Patent Publication Number: US-2023158587-A1

Title: Suction device and handheld power saw machine equipped therewith

Description:
The invention relates to a suction device for a portable handheld power saw, wherein the handheld power saw has a housing in which a drive motor is arranged and has a tool holder, which can be driven to linearly oscillate along an axis of movement by the drive motor, for a sawing tool having an elongate design and extending along a longitudinal axis for making a saw cut in a workpiece, wherein the handheld power saw has a machine guide body having a machine guide surface facing away from the housing, in front of which machine guide surface the sawing tool protrudes when mounted on the handheld power saw, for guiding the handheld power saw on the workpiece, wherein the suction device has fastening means for detachable fastening on the handheld power saw and has a suction connection for connecting a suction hose such that particles produced when the workpiece is being machined can be suctioned away from the machine guide body through the suction connection. The invention also relates to a handheld power saw with such a suction device. 
     Such a suction device and a handheld power saw equipped therewith are described, for example, in DE 10 2018 102 855 A1. The known suction device is fastened, for example, to the housing, such that when sawing into the workpiece, for example insulating material, the particles produced can be suctioned away directly through the suction connection. The particles pass through the machine guide body in the direction of the suction device. 
     The known suction device is preferably permanently fastened to the housing, even if it is in principle removable therefrom. 
     Further suction devices are described in EP 3 715 032 A1, US 2013/0055577 A1, EP 0 347 631 A2, DE 10 2013 226 082 A1, EP 2 567 964 A1 and US 2011/0083330 A1. 
     It is therefore the object of the present invention to provide an improved suction device and a handheld power saw equipped therewith. 
     To achieve the object, a suction device of the type mentioned at the outset provides for the suction device to have at least one guide contour which, when the suction device is mounted on the handheld power saw, protrudes in front of the machine guide surface, such that the handheld power saw can be guided on the workpiece using the at least one guide contour instead of the machine guide surface. To achieve the object, a handheld power saw with such a suction device is also provided. 
     An advantage results, for example, from the fact that the guide contour is optimally adapted to the respective guide task. For example, different suction devices can be provided for different guide tasks. If the guide contour is worn out, it can be easily replaced, for example by replacing the entire suction device. Furthermore, the assembly and disassembly of the suction device is facilitated. The suction device can be fastened to the front of the machine guide body or mounted in another way. The suction device does not have to be placed, for example, in an intermediate space between the machine guide body and the housing. 
     Furthermore, the assembly of the suction device is facilitated by the fact that it is not or at least not completely to be mounted behind the machine guide surface, e.g., in a space between the machine housing and the machine guide body, but can be mounted completely or at least partially in front of the machine guide surface. 
     It is advantageous if a suction channel or flow channel of the suction device, which is connected on the one hand to the suction connection and on the other hand to a location at which the sawing tool is arranged when the suction device is mounted on the handheld power saw, runs next to or on the machine guide surface. This can contribute to improved suction. 
     An advantageous measure provides that the suction device has a flow channel that extends between a receiving region for the sawing tool and the suction connection, the flow channel extending along the machine guide surface and/or on a side of the machine guide body facing away from the housing when the suction device is fastened to the handheld power saw. 
     The suction device can be designed, for example, in the manner of a shoe. 
     The machine guide body is designed, for example, as a type of slide for guiding along the workpiece or a workpiece surface of the workpiece. 
     The machine guide surface and/or the guide contour of the suction device is, for example, a sliding surface or includes a sliding surface. The machine guide surface and/or the guide contour is or preferably includes a planar surface or planar surface. 
     The machine guide surface and/or the suction device can, for example, have a recess, in particular a fork-shaped and/or V-shaped or U-shaped recess in which the sawing tool is received and/or which is intended to hold the sawing tool. 
     The machine guide surface extends, for example, transversely to the axis of movement of the tool holder and/or transverse to the longitudinal axis of the sawing tool. 
     It is advantageously provided that the suction device, in particular the at least one guide contour, at least partially covers or only partially covers the machine guide surface. It is therefore possible for the machine guide surface to be completely or partially covered by the suction device. 
     Provision can be made, for example, for a partial portion of the machine guide surface to protrude in front of the suction device, in particular laterally and/or in particular in front of the at least one guide contour when the suction device is mounted on the handheld power saw. This portion of the machine guide surface is, for example, positioned at the back in the working direction and is not needed, for example, for guiding the handheld power saw on the workpiece. The partial portion of the machine guide surface protrudes in front of the suction device, for example on a side opposite to the suction connection. 
     Provision is also advantageously made for the at least one guide contour to protrude in front of the machine guide body, in particular on a side facing the suction connection. 
     The suction device advantageously has a support portion for support on the machine guide surface. The support portion includes, for example, support surfaces which are opposite the machine guide surface and which are provided and/or are designed for supporting the machine guide surface. The support surfaces are, for example, planar surfaces or have planar surface portions. 
     The suction connection is preferably arranged next to the support part. For example, the suction connection can be arranged at the back in the working direction when the suction device is fastened to the handheld power saw. As a result, for example, the operator’s view of a work location or of a point where the sawing tool cuts into the workpiece is not impaired by the suction connection or a suction hose arranged thereon. 
     The suction device is preferably designed in such a way that the suction connection is oriented in the direction of an underside of the housing of the handheld power saw when the suction device is fastened to the handheld power saw. 
     The suction device preferably has a recess for the sawing tool, for example a U-shaped, V-shaped recess, a slot or the like. 
     The suction connection and the recess for the sawing tool are preferably arranged on opposite end regions or longitudinal end regions of the suction device. 
     The guide contour of the suction device advantageously extends over the region of the support portion. 
     The guide contour advantageously extends into the region of the suction connection and/or over the entire region of the suction connection. 
     The guide contour preferably extends over an entire region of the suction device that faces away from the housing of the handheld power saw when the latter is mounted on the handheld power saw. 
     The support portion is preferably designed to receive part of the machine guide surface in such a way that another part of the machine guide surface projects in front of the suction device. A length of the support part with respect to a working direction, along which saw cuts can be made in a workpiece with the handheld power saw, is preferably shorter than a length of the machine guide surface with respect to this working direction. 
     The tool holder of the handheld power saw is preferably arranged between the housing and the machine guide body. The tool holder is preferably provided in a receiving space or intermediate space between the machine guide body and the housing that is freely accessible for a tool change of the sawing tool. 
     It is advantageous if the suction device does not extend into the or an intermediate space or receiving space between the machine guide body and the housing and/or does not reach into this space or receiving space when the suction device is mounted on the handheld power saw. 
     An expedient measure also provides that the suction device, apart from a part that receives the machine guide body in a form-fitting manner, does not engage in the or an intermediate space or receiving space between the machine guide body and the housing. 
     It is advantageously provided that the fastening means of the suction device are provided and/or are designed exclusively for fastening to the machine guide body. The fastening means therefore only comprise components which are intended for fastening to the machine guide body. 
     The suction device advantageously has no fastening means for fastening to the housing of the handheld power saw and/or no part that engages in a gap between the machine guide body and the housing when the suction device is mounted on the handheld power saw. 
     The fastening means advantageously have form-fitting holding means, in particular at least one form-fitting projection and/or at least one form-fitting receptacle for a form-fitting hold on the machine guide body. The fastening means particularly preferably have at least one form-fitting projection for form-fitting engagement in the machine guide body, in particular a plug-in receptacle of the machine guide body, and/or a form-fitting receptacle for a form-fitting reception of the machine guide body, in particular a plug-in projection of the machine guide body. 
     The fastening means advantageously have latching means for latching the suction device to the machine guide body. The latching means can include, for example, latching receptacles, latching hooks, latching projections or the like. 
     Alternatively or in addition to the latching means, however, magnetic holding means can also be provided, i.e., for example a magnet or the like, which is provided on the suction device and enables magnetic hold on the machine guide body of the handheld power saw. 
     It is preferred if the form-fitting holding means and/or the latching means and/or the magnetic holding means are arranged on a support part of the suction device on which the machine guide surface of the machine guide body is or can be supported. The form-fitting holding means and/or the latching means and/or the magnetic holding means are therefore used to hold directly on the machine guide surface. For example, a form-fit counter-contour for the form-fitting holding means is provided and designed directly on the machine guide surface, for example as a depression, a projection or the like on the machine guide surface. For example, the machine guide surface itself or a latching counter-contour arranged on the machine guide surface can be used for latching the latching means and/or be provided to magnetically hold the magnetic holding means. Said latching means or holding means therefore do not act on an edge region of the machine guide surface, but rather in a core region of the machine guide surface. For example, latching receptacles or plug-in receptacles are provided on the machine guide surface. 
     It is advantageous if the fastening means have at least one plug-in receptacle for plugging in the machine guide body and/or at least one plug-in projection for plugging into a machine plug-in receptacle along a plug-in path and/or have a quick-release axle. The support portion already mentioned is preferably provided in the region of the at least one plug-in receptacle and/or extends next to the receptacle. At least part of the machine guide surface can preferably be inserted into the plug-in receptacle. 
     The suction device advantageously has first and second plug-in receptacles arranged next to one another, into which the machine guide body can be inserted sequentially, i.e., it can first be plugged into the first and then into the second plug-in receptacle, with the machine guide body being already able to engage at least partially in the second plug-in receptacle when inserted into the first plug-in receptacle. When the machine guide body is fully inserted into the first plug-in receptacle, it can be fully inserted into the second plug-in receptacle. 
     A combination of both measures is easily possible. For example, a portion of the machine guide body can be inserted into the plug-in receptacle of the fastening means or the suction device, thus forming a guide-body plug-in projection, so to speak. The suction device for its part can have at least one plug-in projection, which can be plugged into a plug-in receptacle of the machine, for example when the machine guide body is plugged into the receptacle for the suction device. The at least one machine plug-in receptacle is preferably arranged on the machine guide surface. It is particularly advantageous if a machine plug-in receptacle is provided next to a recess for the sawing tool. 
     It is also advantageous if the plug-in receptacle of the suction device is designed to receive an edge part of the machine guide body, the edge part having a part of the machine guide surface and an end face of the machine guide body at an angle to the machine guide surface. For example, a part of the machine guide body that faces away from the tool holder of the handheld power saw can be provided for plugging into the plug-in receptacle of the suction device. 
     The plug-in receptacle of the suction device is preferably designed in the manner of a receptacle pocket. For example, the edge portion of the machine guide body can be inserted into these receiving parts. 
     The machine guide body therefore preferably has at least one machine plug-in receptacle, for example in the form of an eyelet, a slot or the like. As mentioned, this machine plug-in receptacle is preferably located on the machine guide surface, in particular next to a recess for the sawing tool. 
     A preferred measure provides for the fastening means to have plug-in fixing means for fixing the suction device transversely to the plug-in direction, along which the machine guide body can be plugged into the plug-in receptacle. The machine guide body is thus fixed in the plug-in receptacle by preventing it being pulled out by the plug-in fixing means. 
     The plug-in fixing means include, for example, magnetic holding means, in particular at least one magnet, and/or latching means and/or latch hooks and/or the already mentioned form-fitting holding means or the like. 
     The plug-in fixing means can be formed, for example, by a further plug-in projection or a further plug-in receptacle of the suction device: 
     It is advantageously possible, for example, for the machine guide body to be able to be inserted into the plug-in receptacle of the suction device along a first plug-in path, e.g., along a plug-in axis or direction and the at least one plug-in projection of the suction device can be inserted into the machine plug-in receptacle in a second plug-in path or direction at an angle with respect to the first plug-in path or direction, e.g., along an arcuate path. For example, the machine guide body can first be inserted into the plug-in receptacle and then the at least one plug-in projection of the suction device can be brought into engagement with the machine plug-in receptacle along the second plug-in direction. 
     Preferably on the plug-in receptacle of the suction device and/or on the at least one plug-in projection of the suction device there are latching means for latching with the machine guide body. It is possible for the at least one plug-in projection of the suction device to be designed as a latching hook. The latching means can include, for example, latching receptacles, latching hooks, latching projections or the like. 
     A plug-in direction for plugging the machine guide body into the plug-in receptacle of the suction device preferably extends away from the at least one plug-in projection or transversely to the at least one plug-in projection of the suction device. Thus, for example, a part of the machine guide body dips into the plug-in receptacle when it is plugged into the plug-in receptacle of the suction device and then the at least one plug-in projection of the suction device can be plugged into the machine plug-in receptacle of the machine guide body. 
     The machine guide body preferably has one or more receptacles for the fastening means of the suction device on the machine guide surface. Such a receptacle is or includes, for example, a form-fitting receptacle and/or a plug-in receptacle and/or a latching receptacle. One or more such receptacles are preferably provided on each of the side legs of the machine guide body, which extend next to a recess for the sawing tool. For example, the machine guide surface has passage openings and/or cavities as receptacles for the fastening means and/or for form-fitting fastening of the suction device in the region of the machine guide surface. 
     The suction device preferably has a pair of plug-in projections and/or latching hooks. The plug-in projections or latching hooks preferably have the same or essentially the same distance from the plug-in receptacle of the suction device if a plug-in receptacle is provided. 
     The suction device advantageously has a pair of plug-in projections, in particular latching hooks, for insertion into machine plug-in receptacles of the machine guide body, which have at least one latching contour, in particular a hooked projection, for latching with the machine plug-in receptacles, wherein the latching contours of the plug-in projections can be brought out of engagement with counter-latching contours of the machine plug-in receptacles, for example their edge regions, by a movement of the plug-in projections toward or away from each other. Thus, for example, an operator can grasp the plug-in projections with two fingers and move them towards one another in order to release a latching with the machine plug-in receptacles and thus bring the plug-in projections out of engagement with the machine plug-in receptacles. 
     When the latching means engage or disengage, application of force to the suction device can lead to its deformation, which makes operation more difficult, for example. The following measure can help to make operation easier: 
     It is advantageously provided that the fastening means have a latching body, in particular a latching hook, for latching with the machine guide body and at least one support body, in particular a plug-in projection or a plug-in receptacle, for support and/or form-fitting fixing of the suction device on the machine guide body with respect to a release movement for releasing the latching body from a latching engagement with the machine guide body and/or with respect to a fixing movement of the latching body for latching the suction device with the machine guide body. The latching body has a latching contour, for example a hook projection, for latching with the machine guide body, which can be disengaged from the machine guide body by a release movement. The support body counteracts, for example, a deformation of a base body of the suction device when the latching body is actuated. 
     An advantageous measure provides that the latching body and the at least one support body are arranged directly next to one another and/or both are designed for joint engagement in a machine plug-in receptacle of the machine guide body. If the latching body and the support body are arranged directly next to one another, for example a plug-in projection and a latching hook, they can engage in one and the same machine plug-in receptacle or in separate machine plug-in receptacles. The machine guide body is equipped accordingly, i.e., it has a pair of plug-in receptacles arranged next to one another or a sufficiently large plug-in receptacle and/or an elongated hole for receiving the latching body and the support body of the fastening means of the suction device. 
     It is particularly preferred if the latching body is arranged between two support bodies, for example between two plug-in projections, at least one of which is used for form-fitting fixing and/or supporting during the release movement or fixing movement of the latching body. It is possible for the other support body to form, for example, a displacement safeguard that blocks or impedes removal of the machine guide body, in particular its edge portion, from the plug-in receptacle of the suction device. 
     The guide contour can, for example, be designed as a machine guide surface or have a machine guide surface. 
     The suction device preferably has a recess for the sawing tool. The recess can be provided, for example, on a machine guide surface of the guide contour designed as a planar surface. 
     However, a recess for the sawing tool is preferably delimited by one or more side walls of the suction device. 
     At this point it should be mentioned that the guide contour can be designed as a planar surface, for example, or can have a planar surface. 
     However, the guide contour is preferably relatively narrow, which can be implemented in particular by the following measures. 
     It is advantageous if the suction device has at least one side wall, the narrow side or face of which forms the guide contour or a part of the guide contour. It is advantageously provided that the at least one side wall is located next to the suction connection and/or extends in a region between the suction connection and a recess of the suction device for the sawing tool. 
     The sidewall may form part of a U-shaped or annular sidewall or be configured as a U-shaped or annular sidewall. The side wall can delimit a flow channel, for example, through which particles can flow away from the sawing tool in the direction of the suction connection. 
     A preferred measure provides that the guide contour has a U-shape. A base leg of the guide contour preferably runs next to the suction connection. Side legs of the guide contour advantageously extend in the direction of a recess for the sawing tool. 
     It is advantageously provided that the suction device has at least two side walls at a distance from one another, the distance being designed and provided for receiving the sawing tool or the saw blade and/or forming part of a flow channel leading to the suction connection. Narrow sides of the side walls are provided, for example, for resting on the workpiece or for guiding on the workpiece. 
     The suction device as a whole or a part thereof is preferably made of plastic, which is also preferably reinforced by fibers, for example glass fibers and/or carbon fibers. The suction device can thus be produced inexpensively and can therefore be easily replaced when it is worn. For example, the guide contour in this embodiment of the suction device is also made of plastic. 
     For example, the suction device consists at least partially or entirely of polycarbonate-acrylonitrile-butadiene-styrene copolymer (PC-ABS), polyoxymethylene (POM), polyamide, in particular polyamide with glass fiber reinforcement, for example PA6GFx, where x is a percentage of glass fibers and is, for example, between 5 and 50, in particular about 5-20. For example, the plastic consists of 5 % of glass fibers when designated as PA6GF5. 
     Advantageously, however, only one base body of the suction device can be made of plastic, particularly in connection with the measure explained below. 
     An advantageous concept provides that at least part of the guide contour is arranged on a guide element which is detachably fastened or can be fastened to a base body of the suction device. The guide element is designed, for example, like a plate. For example, two guide elements can be provided, which are designed in the manner of skids. 
     It is also advantageous if the guide contour as a whole or at least part of the guide contour is arranged on a guide element which is detachably fastened or can be fastened to a base body of the suction device. 
     The suction connection has, for example, a connection body, in particular a tubular body. 
     For example, latching means, in particular latching lugs or the like, can be provided on the suction connection for latching or holding the suction hose in a form-fitting manner. The suction connection preferably comprises a tubular connection element or a tubular body. 
     This tubular body can form a connecting piece. 
     In a guide plane that is spanned by the guide contour or that is provided on the guide contour, the suction device is supported in the region of the sawing tool on the workpiece to be machined when the suction device is mounted on the handheld power saw. It goes without saying that other parts of the guide contour can, for example, be set back in relation to this guide plane, in particular parts of the guide contour in the region of the suction connection. The guide contour can preferably have a skid-like shape. 
     It is preferred if the suction connection has a connection body, in particular a connecting piece, which is designed for fastening a suction hose and is rotatably or pivotally mounted with respect to a base body provided and designed for connection to the machine guide body, about one or more axes of rotation or pivot axes using at least one pivot bearing or one pivot bearing assembly. The connecting piece is designed, for example, as a piece of pipe. For example, a pivot axis of such a pivot bearing preferably runs parallel to a guide plane in which the guide contour lies or which is spanned by the guide contour. 
     It is advantageous if a longitudinal axis of the suction connection, in particular of a connection body of the suction connection, runs inclined at an angle to a machine guide surface which is spanned by the guide contour or in which the guide contour is arranged. A longitudinal extension or longitudinal axis of the suction connection, in particular a connection body of the suction connection, is oriented, for example, at an angle to a machine guide surface or region in which the guide contour of the suction device is located. The angle between the longitudinal axis or longitudinal extent of the suction connection and the machine guide surface is in a range of approximately 15° to 80°, for example. An inclination of approx. 20-40° is preferred. However, it is also possible that, for example, the machine guide surface and the longitudinal axis or longitudinal extent of the suction connection have an angle of 90° or almost 90°, for example if a region of the suction device on which the suction connection is arranged is protruding sufficiently far to the side in front of the machine guide body and/or the housing. If the connection body or suction connection is stationary with respect to the guide contour, the aforesaid angle is unchangeable. If a pivot bearing is present, the angle can be adjustable, for example in an angle range of 15° to 60°. Such pivotable arrangement can be implemented, for example, with a rotary axis or pivot axis that runs parallel to the machine guide surface. 
     The sawing tool advantageously has a sword-like or blade-like shape. 
     Advantageously, the drive motor of the handheld power saw or a longitudinal axis of the drive motor extends parallel to a longitudinal axis of the sawing tool. 
     The housing of the handheld power saw advantageously has a pistol-like shape. 
     It is advantageously provided that the suction connection is arranged at the front in the working direction when the suction device is fastened to the handheld power saw. This embodiment is preferred in particular when the suction device is used in a jigsaw. 
     The handheld power saw is preferably a saber saw and/or not a jigsaw. In principle, however, the invention can also be used with a jigsaw. 
     It should be mentioned that the handheld power saw can preferably be used in a first working direction and in a second working direction opposite to the first working direction. For example, the sawing tool can have a sawing contour, toothing or the like on opposite sides, such that saw cuts can be made in a workpiece in opposite working directions. However, it is also possible for the sawing tool to have a sawing contour on only one side, in particular the longitudinal side, to be fastenable to the tool holder of the handheld power saw in a first angular position in order to make saw cuts in the workpiece in a first working direction and in a second angular position offset by 180° in order to make saw cuts in a second position in the workpiece. 
    
    
     
       Exemplary embodiments of the invention are explained below with reference to the drawing. In the figures: 
         FIG.  1    shows a perspective oblique view of a handheld power saw with a suction device and a vacuum cleaner, 
         FIG.  2    shows a perspective oblique view of a front part of the handheld power saw according to  FIG.  1    with the suction device removed, 
         FIG.  3    shows the front part of the handheld power saw according to  FIG.  1    and the suction device from the side, 
         FIG.  4    shows a perspective oblique view of the suction device, 
         FIG.  5    shows a section through a machine guide body of the handheld power saw and the suction device approximately along a section line A-A in  FIG.  4   , the suction device being partially pivoted away from the machine guide body, for example when the suction device is installed on or removed from the machine guide body, 
         FIG.  6    shows the view according to  FIG.  5   , with the suction device being connected to the machine guide body, 
         FIG.  7    shows another suction device according to the above figures with magnetic hold in a perspective diagonally from below, 
         FIG.  8    shows the suction device according to  FIG.  7   , but with the guide elements removed, 
         FIG.  9    shows a plan view of the suction device according to  FIGS.  7 ,  8   , 
         FIG.  10    shows a cross-sectional view through the arrangement according to  FIG.  9   , approximately along section line B-B in  FIG.  9   ; 
         FIG.  11    shows another suction device, for example in a plan view corresponding to  FIG.  9   , 
         FIG.  12    shows a side view of the suction device according to  FIG.  11   , 
         FIG.  13    shows a section through the guide device according to  FIG.  11   , approximately along section line D-D; 
         FIG.  14    shows a section through the guide device according to  FIG.  12   , approximately along section line E-E; 
     
    
    
     In the exemplary embodiments described below, the same components are provided with the same reference symbols. Components that are essentially similar or functionally the same have reference numbers that differ by  100  in each case. 
     A handheld power saw  10  has a machine housing  17  in which a drive motor  11  is received. The drive motor  11  is, for example, an electric motor that can be supplied with electrical energy via an electrical energy store  19 , for example a battery pack. Alternatively, the handheld power saw  10  may also comprise a mains cable in order to connect it to an electrical supply power supply. 
     The drive motor  11  can be switched on and off using a switching element  16  and can preferably also be adjusted with regard to its speed. The drive motor  11  drives an output element  13  via a gear  12 , on which a tool holder  14  for a sawing tool  15  is provided. The sawing tool  15  is, for example, a saw blade  15   a , which can be inserted into the tool holder  14  and locked therein. 
     The gear  12  is an oscillating gear and converts a rotating movement of the drive motor  11  into an oscillating linear movement, such that the tool holder  14  and thus also the sawing tool  15  makes an oscillating movement O along an axis of movement SO. 
     The sawing tool  15  can be fixed in opposite positions in the tool holder  14 , such that the handheld power saw  10  can be operated once for a sawing operation in a working direction AR1 and in a position of the sawing tool  15  rotated by 180° with respect to the tool holder  14  in a working direction AR2. 
     Provided on a part of the machine housing  17  facing away from the tool holder  14  is a handle  18  which is designed like a pistol, such that the machine housing  17 , which has a longitudinal shape, can be gripped by an operator. The switch  16 , for example a pressure switch, is located on the handle  18 . 
     The tool holder  14  is arranged on a front wall  17 A of the machine housing  17 , the front wall  17 A and the handle  18  representing opposite end regions of the machine housing  17 . 
     In order to guide the handheld power saw  10  on a workpiece, for example a wall surface or the like, the handheld power saw  10  has a machine guide device  20  with a machine guide body  22 . The machine guide device  20  is positioned in front of the tool holder  14 , so to speak, and has a machine guide surface  23  which extends in front of the machine tool holder  14  and is provided for guiding on a workpiece surface. The machine guide surface  23  is configured as a planar surface, for example. 
     The machine guide body  22  is mounted on the machine housing  17  such that it can be displaced with respect to a longitudinal axis L by means of a bearing device  21 V. The bearing device  21 V comprises support elements  21 , which extend away from the machine guide body  22  in the direction of the machine housing  17  and are immovably received in displacement receptacles  21 A arranged on the machine housing  17 , in particular its inner space. In the region of the displacement receptacles  21 A, there is a fixing body  21 C, for example a bar, latching body or the like, for engaging in fixing receptacles  21 B on one or both of the support elements  21  in order to fix the machine guide body  22  in different longitudinal positions with respect to the longitudinal axis L. A plurality of fixing receptacles  21 B can be provided at longitudinal distances with respect to the longitudinal axis L. 
     The machine guide body  22  has side legs  27  which extend away from the machine guide surface  23  and/or are angled to the machine guide surface  23 . The side legs  27  are connected to the supporting elements  21 , for example integrally or connected by means of bolts or other connecting elements  27 A. 
     The machine guide body  22  has an edge portion  24  from which side legs  25  extend away, between which there is a recess  26  for the sawing tool  15 . The edge portion  24  could also be referred to as a base leg, from which side legs or guide legs  25  extend away. Overall, the edge portion  24  and the side legs  25  form a U-shape or a fork-like shape that delimits an intermediate space in the form of the recess  26  for the sawing tool  15 . The machine guide surface  23  extends both in the region of the base leg or the edge portion  24  and on the side legs  25 . Basically, the machine guide surface  23  is provided for guiding the handheld power saw  10  on the workpiece surface. 
     When the sawing tool  15  is in operation, chips, particles or the like are formed. These can be suctioned away by a suction device  90 , for example a vacuum cleaner. 
     The suction device  90  has a suction housing  95 , a suction turbine  92  and a dust collection chamber  93  which is flow-connected to a suction hose  91 . 
     Now it can be easily imagined that it is difficult for the operator to bring the suction hose  91  or its inflow opening close to the work site of the sawing tool  15  and to hold it there during the sawing operation. In order to remedy this problem, a suction device  30  is provided which can be easily connected to the handheld power saw  10  when needed, but which can also be removed again just as easily when it is not needed. 
     The suction device  30  has a suction connection  31  for connecting the suction hose  91 . The end of the suction hose  91  facing away from the suction housing  95  has a connecting piece  94  which can be connected to the suction connection  31 . The connecting piece  94  can, for example, be plugged onto the suction connection  34  or inserted into the connection. 
     The suction connection  31  has a connecting piece  32  as a connection body  32 A, for example a tubular body, which annularly encloses a passage channel  34 . The passage channel  34  is flow-connected to a suction region  35  of the suction device  30 , with the suction region  35  being arranged in the region of the sawing tool  15  or the tool holder  14  when the suction device  30  is fastened to the handheld power saw  10 , such that when the sawing tool  15  is in operation, resulting chips or other similar particles can be sucked through the passage  34 . 
     The connecting piece  94  can be inserted into the tubular body or connecting piece  32  or slipped onto it. 
     Form-fitting contours  33 , for example latching projections, lugs or the like, are present on the connecting piece  32  for form-fittingly holding the connecting piece  94 , such that this can be form-fittingly connected to the connecting piece  32  with a rotational plug-in movement, for example. 
     Form-fitting contours  33  which protrude into the passage channel  34  and are provided for a form-fitting engagement in the connecting piece  94  when this is inserted into the connecting piece  32  are advantageous. 
     Alternatively or additionally, however, form-fitting contours  33  can also be provided on an outside of the connecting piece  32  facing away from the passage channel  34 , which contours are intended to engage in a connecting piece  94  plugged onto the connecting piece  32 . 
     The suction device  30  has a base body  40 . 
     The suction device  30  and/or the base body  40  comprise a support part  41  for support on the machine guide body  22  and a suction part  42  on which the suction connection  31  is provided. If the suction device  30  is fastened to the machine guide device  20 , in particular the machine guide body  22 , the suction portion  42  projects laterally in front of the machine guide body  22  at least partially. 
     The base body  40  has side walls  44  which are connected to one another by a bottom wall  43  at one longitudinal end region and by a rear wall  45  at another longitudinal end region. The side walls  44  and the rear wall  45  are integral with each other. The rear wall  45  is curved, for example, and extends next to the connecting piece  32  or its peripheral wall. 
     Arranged on their longitudinal end regions of the side walls  44  facing away from the rear wall  45  are supporting legs  46  which are provided for support and fastening to the machine guide body  22 . 
     In the region of the support legs  46  or on the support legs  46  there is a recess  46 A through which a portion of the machine guide body  22  protrudes laterally in front of the suction device  30 . 
     Supporting contours  43 A are provided on the support legs  46 , which are flush with the bottom wall  43  and support the machine guide body  22 , for example on the machine guide surface  23 . 
     A recess  47  is provided on the bottom wall  43  and between the support legs  46  and the sawing tool  15  engages in this recess when the suction device  30  is fastened to the machine guide body  22 . 
     The bottom wall  43  forms part of a base leg or a base  36  of the suction device  30 , from which the side legs  37 , namely in particular the support legs  46 , protrude. The support legs  46  or side legs  37  are assigned to the side legs  27  of the machine guide body  22 . 
     The side legs  37  and the base  36  essentially cover the machine guide surface  23  of the machine guide body  22 . 
     A portion of the side legs  27  protrudes from the free end portions of the support legs  46  or side legs  37  but is not intended to be in contact with a workpiece. Rather, when the suction device  30  is mounted on the handheld power saw  10 , a guide contour  55  of the suction device  30  is provided for guiding along a workpiece W. 
     The guide contour  55  has longitudinal portions  56  which are provided by the narrow sides of the side walls  44 . The longitudinal portions  56  extend along the side legs  37  of the machine guide body  22  and/or of the suction device  30 . Toward the free end regions of the side legs  27 , the guide contour  55  also has support portions  57 . The support portions  57  and a connecting portion  58  of the guide contour  55  connecting the longitudinal portions  56  are provided on opposite sides of the longitudinal portions  56 . The connecting portion  58  is provided by a narrow side of the rear wall  45  of the base body  40 . 
     The guide contour  55  therefore delimits a flow channel  52  which leads to the suction region  35  at the suction connection  31 . The flow channel  52  thus runs past the machine guide surface  23  or next to the machine guide surface  23  or directly adjacent to the machine guide surface  23 . 
     It is clear from  FIG.  3    that the handheld power saw  10  can be guided directly on the workpiece W with the machine guide surface  23  when the suction device  30  is removed from the handheld power saw  10 . However, if the suction device  30  is fastened to the handheld power saw  10 , the guide contour  55  is used for guiding on the workpiece W. 
     The recess  47  for the sawing tool  15  is delimited on the peripheral side by an inner wall  48 . The inner wall  48  extends to an end wall  49  which is arranged at the free end regions of the side legs  37 . 
     A top wall  55  which lies diagonally opposite the bottom wall  43  extends between the side walls  44 . Furthermore, a top wall  51  is connected to the top wall  50  on which the connecting piece  32  is arranged. 
     The top walls  50 ,  51  are preferably at an angle to one another, such that the connecting piece  32  arranged on the top wall  51  is oriented at an angle to the guide contour  55 , for example at an angle of approximately 45°. 
     Consequently, a flow channel runs through the suction connection  31  obliquely to the rear in the direction of the machine housing  17  when the suction device  30  is fastened to the handheld power saw  10 . It is preferred if the flow channel is inclined backwards with respect to the machine housing  17  and/or is oriented towards an underside of the machine housing  17 . 
     Fastening means  60  are provided for fastening the suction device  30  to the handheld power saw  10 , in particular to its guide device  20 . 
     The fastening means  60  comprise a plug-in receptacle  61  and a plug-in receptacle  62  arranged next to the plug-in receptacle  61 . The machine guide body  22  can be inserted into the plug-in receptacle  61  along a plug-in path SB 1 , namely with its edge part  24 . 
     The plug-in receptacle  61  is bounded by the side walls  44  and the top wall  50 , in particular a portion  50 A of the top wall  50 . In the plug-in receptacle  61  there is also a plug-in stop  54  which, for example, is connected to the side walls  44  and/or the top wall  50 . The portion  50 A of the top wall  50  is supported on the machine guide body  22 , such that the suction device  30  is supported with respect to a force acting from below to the right in  FIG.  6   , for example, which can be exerted by the suction hose  95 , for example. 
     The edge portion  24  of the machine guide body  22  strikes the plug-in stop  54  with its end face  24 A facing away from the recess  26 , which is shown by way of example in  FIG.  5    and  FIG.  6   , for example. Consequently, the edge portion  24  of the machine guide body  22  forms a plug-in projection for plugging into the plug-in receptacle  61 . 
     When the machine guide body  22  is plugged into the plug-in receptacle  61 , it is then completely plugged into the plug-in receptacle  62  arranged next to the plug-in receptacle  61 , namely along a plug-in path SB 2 . The plug-in path SB 2  runs at an angle to the plug-in path SB 1 , for example approximately at right angles. 
     When the machine guide body  22  is inserted into the receptacles  61 ,  62 , a part  24 B of the machine guide body  22  assigned to the sawing tool  15  protrudes in front of the suction device, in particular the support leg  46 . 
     While the plug-in path SB 1  can have a substantially rectilinear or linear course, the plug-in path SB 2  is, for example, approximately arcuate. Consequently, the machine guide body  22  is pivoted into the plug-in receptacle  62 , so to speak, with the machine guide body  22  being pivoted with its edge portion  24  in the plug-in receptacle  61 , which in this respect forms a pivot bearing receptacle. 
     When the machine guide body  22  is pivoted into the plug-in receptacle  62 , it is supported on the side walls  44  with its narrow longitudinal sides, which extend next to the machine guide surface  23 . Supporting ribs  53  for supporting the machine guide body  22  are preferably provided there. 
     The plug-in receptacles  61  and  62  form form-fitting receptacles  61 A,  62 A for holding the machine guide body  22  as a whole in a form-fitting manner. Consequently, for example, the two form-fitting receptacles  61 A,  62 A are form-fitting holding means  63 . 
     Further form-fitting-latching holding means  63  of the fastening means  60  are formed by support bodies  64  and  65  which are provided for engaging in machine plug-in receptacles  28  on the machine guide body  22 . 
     The machine plug-in receptacles  28  are located on the side legs  27  and are arranged directly on the machine guide surface  23 . Consequently, recesses are provided on the machine guide surface  23  to provide the machine plug-in receptacles  28 . 
     The support bodies  64 ,  65  form plug-in projections  64 A,  65 A for plugging into the machine plug-in receptacles  28 . The machine plug-in receptacles  28  form form-fitting-latching receptacles and/or components of form-fitting means. 
     A support body  64  and a support body  65  are provided on each side leg  37 . Both support bodies  64  and  65  of a respective side leg  37  engage in one and the same machine plug-in receptacle  28 . 
     It would of course be possible for a separate plug-in receptacle to be provided on the side legs  27  of the machine guide body  22  for each support body  64  or  65 , even if this is not shown in the drawing. 
     Latching projections  67  are provided between the support bodies  64  and  65  to provide latching means  66 . The latching projections  67  have latching contours  68  on their free end regions, which are designed for latching with the machine plug-in receptacles  28 , which form latching receptacles. The latching projections  67 , which are designed, for example, as latching hooks  67 A, hook into the plug-in receptacles  28  and are supported on the machine guide body  22  on a side facing away from the machine guide surface  23 , i.e., on the edge regions of the machine plug-in receptacles  28 . The latching projections  67  can be gripped by an operator, for example with his fingers, such that she can move the two latching projections  67  toward one another, i.e., in the direction of the recess  47 , which is indicated as a release movement LK in the drawing, in order to disengage the latching projections  67  To bring engagement with the plug-in receptacles or latching receptacles  28 . 
     The support bodies  64  have a stabilizing effect, i.e., they support the suction device  30  during the release actuation or release movement LK by preventing the side legs  37  on which the latching projections  67  are arranged from moving toward one another. 
     The support bodies  64  are provided on the longitudinal end regions of the side legs  37 , for example as an extension of the end wall  49  or as an extension of the end wall  49 . 
     Extending alongside the end wall  49  is the inner wall  48  which delimits the recess  47 , the end wall  49  and the inner wall  48  being at an angle to one another. Due to the mutually angled walls  48  and  49 , the support bodies  64 , which are designed in the manner of spikes or supporting projections, are particularly rigid. 
     Thus, when the support bodies  64  engage in the machine plug-in receptacles  28 , they support the side legs  37  of the suction device  30  with respect to movements in the sense of a narrowing of the recess  47  or a widening of the recess  47 . Thus, the support bodies  64  can act in particular as a support during the release movement LK. 
     The machine plug-in receptacles  28 , in which the latching projections  67  also engage, are designed, for example, as slots, such that the support bodies  64 ,  65  arranged next to one another in a row and the latching projections  67  arranged in between can engage in one and the same machine plug-in receptacle  28 . 
     The support bodies  64  and the support bodies  65  are provided for support on mutually opposite longitudinal end regions of the machine plug-in receptacles  28 . Both support bodies  64  and  65  counteract mutually opposite sliding movements of the machine guide body  22  along the plug-in path SB 1 . 
     The machine plug-in receptacles  28  and/or  29  are designed, for example, as passage openings. The machine plug-in receptacles  28  and  29  form latching receptacles, for example and/or form-fitting receptacles and/or plug-in receptacles, i.e., generally receptacles for the fastening means  60 ,  160 ,  260 . 
     The support bodies  65  counteract a release movement or a pulling out of the machine guide body  22 , in particular of the edge portion  24 , from the plug-in receptacle  61  and form plug-fixing means  74  with respect to the plug-in receptacle  61 . 
     At the bottom of the receptacle  62  and/or on the bottom wall  43  a projection  69  is arranged. The projection  69  can be provided for support on the machine guide surface  23 , for example and/or as an aid for a tool, for example an injection molding tool, with which the suction device  30  can be produced. If there is no machine plug-in receptacle  29 , as explained below which is arranged on a base leg of the machine guide surface  23 , the projection  69  can be supported on the machine guide surface  23 . An embodiment of the machine guide surface  23  or the machine guide body  22  without a machine plug-in receptacle  29  is preferred when the suction device  30  is used. 
     Additional plug-in fixing means  74  can also be formed by the projection  69 , for example, if this forms a latching contour. The projection  69 , i.e., the latching contour, can, for example, engage in a latching manner in the machine plug-in receptacle  29  forming a latching receptacle when the edge part  24  is inserted into the plug-in receptacle  61  along the plug-in path SB 1 . 
     The support bodies  64 ,  65  thus ensure that the edge portion  24  or the machine guide body  22  is held in a form-fitting manner in the plug-in receptacle  61 . 
     The latching means  66 , in particular the latching projections  67 , counteract a release of the machine guide body  22  from the plug-in receptacle  62  along the plug-in path SB 2  and form plug-fixing means  75  with respect to the plug-in receptacle  61 . 
     A suction device  130  according to  FIGS.  7 - 10    has components that are similar or identical to those of the suction device  30 . 
     The suction device  130  comprises a support portion  41  for support on the machine guide body  22  and a suction portion  42  with a suction connection  131 . The suction connection  131  comprises a connecting piece  132  as a connection body  132 A, on the outer circumference of which form-fitting contours  133 , for example bayonet-like form-fitting contours  133 , are arranged for connecting the connecting piece  94  or another connecting piece of a suction hose having bayonet contours. 
     A preferred concept provides that the connecting piece  132  can be rotated or pivoted about an axis S 2  with respect to a base body  140  of the suction device  30 . For this purpose, a tubular body  136 , for example, is arranged on the base body  140 , on which the connecting piece  132  is pivotally mounted, for example by means of a pivot bearing  137 . The pivot bearing  137  is formed, for example, in that flange-like projections and receptacles of the connecting piece  132  and the tubular body  136  engage in one another. The tubular body  136  and the connecting piece  132  are flow-connected to one another. 
     The tubular body  136  has an inlet opening which is open to a suction region  35  between side legs  37  of the suction device  130  and is flow-connected thereto. 
     The base body  140  thus has the two side legs  37  and a base  36  from which the side legs  37  protrude. 
     The base body  140 , like the base body  40 , has plug-in receptacles  61  and  62  into which the machine guide body  22  can be inserted. Plug-in receptacles  61  and  62  and magnetic holding means  70  form part of fastening means  160  of suction device  130 . 
     From a bottom wall  143  of the base body  140 , which represents the base of the support part  41 , so to speak, side walls  144  protrude at an angle in the manner of side legs, on which narrow sides of the machine guide body  22  can be supported. The side walls  144  and the bottom wall  143  delimit the plug-in receptacle  62 . 
     The bottom wall  143  and a top wall  150  lying opposite it in the region of the suction connection  131  and portions of the side walls  144  delimit the plug-in receptacle  61 . 
     Recesses  144 A can be provided on the side walls  144 , in which, for example, the connecting elements  27 A or other contours protruding in front of the machine guide body  22  can engage. 
     As a result, the machine guide body  22  can be inserted into the plug-in receptacles  61  and  62  along the already explained plug-in paths SB 1  and SB 2 , with plug-in fixing means  174  and  175  fixing the machine guide body  22  in the plug-in receptacles  61  and  62 . 
     The plug-fixing means  174  include plug-in projections or support bodies  164  for engaging in the machine plug-in receptacles  28 . The plug-in paths SB 1  and SB 2  run in plug-in directions SR 1  and SR 2  at an angle to one another. 
     Advantageously, the plug-fixing means  174  also include a plug-in projection  169 , which can also be regarded as a latching projection, which is provided and designed to engage in the plug-in receptacle or latching receptacle  29 . The plug-in projection or latching projection  169  is located, so to speak, on the base  36  in a bottom region of the plug-in receptacle  61 . For example, the plug-in projection  169  is designed as a latching contour  169 A and thus as a latching means. 
     The plug-in fixing means  175  comprise magnetic holding means  70 . The magnetic holding means  70  comprise a plurality of magnets  71  for a magnetic hold on the machine guide body  22 . The magnets  71  ensure that the suction device  130  is held magnetically on the machine guide body  22 , for example if this is made of ferromagnetic metal. The suction device  30  must therefore be removed from the machine guide body  22  against the force of the magnets  71 , such that it can be removed from the plug-in receptacle  62  when the suction device  30  is no longer required. 
     The magnets  71  are received in receptacles  72  of the base body  140 . The receptacles  72  are arranged on the side legs  37 , for example. A clamping contour  73 , for example a clamping projection, is advantageously arranged in a respective receptacle  72  for clamping the magnet  71  received in the receptacle  72 . The magnets  71  can, for example, be held in the receptacles  72  in a materially bonded manner, for example by gluing. 
     The receptacles  72  are provided, for example, on the bottom wall  43 , in particular on the side facing away from the plug-in receptacle  62 . The receptacles  72  are open, for example in the direction of a guide contour  155  of the suction device  130 , but are closed by guide elements  156 . Thus, the receptacles  72  and the magnets  71  arranged therein are covered both on their side facing away from the plug-in receptacle  62  and on their side facing the plug-in receptacle  62 . 
     The guide elements  156  are made of plastic or metal, for example. The guide elements  156  preferably consist of a ferromagnetic multipart, such that the magnets  71  can also hold the guide elements  156  magnetically on the base body  140 . 
     The base body  140  has receptacles  138  for the guide elements  156  on a side facing away from the plug-in receptacle  62 . The guide elements  156  are designed, for example, like plates and have recesses into which the retaining projections  139 B on the receptacles  138  engage. The holding projections  139 B are designed, for example, in the form of supporting projections, latching projections or the like. Furthermore, the receptacles  138  are bounded by side legs  139 A which project at an angle from the bottom wall  143 . 
     The guide elements  156  are advantageously designed in the form of guide skids or the like, with which the suction device  130  and thus also the handheld power saw  10  to which the suction device  130  is fastened can be guided along the workpiece W. 
     The guide elements  156  extend along the side legs  37  and are arranged laterally next to the recess  47  into which the sawing tool  15  can engage. 
     A further pivotability of the connecting piece  132  or the suction connection  131  with respect to the base body  140  about a pivot axis S 1  is indicated in  FIG.  8    as an example, the pivot axes S 1  and S 2  being at an angle to one another, for example at right angles. A bearing concept for pivoting the connecting piece  132  about the pivoting axis S 1  in addition to or alternatively to the pivoting about the pivoting axis S 2  is explained in connection with the suction device  230  and its connecting piece  232  according to  FIGS.  11 - 13   . 
     At this point it should be mentioned that the bearing concept of the connecting piece  232  forming a connecting body  232 A and the connecting piece  132  can also be implemented individually or in combination with the suction device  130 . 
     The connecting piece  232  is pivotably mounted about the pivot axis S 1  with respect to a base body  240  of the suction device  230  by means of pivot bearings  280 . 
     Bearing receptacles  282  are arranged on the base body  240 , in particular in the region of a plug-in receptacle  61  of the base body  240 , into which bearing pins or bearing projections  281 , which are arranged on the connecting piece  232 , engage. The bearing projections  281  protrude outwards in front of the connecting piece  232  and engage in the bearing receptacles  282 , which are configured as receiving chambers, for example. 
     Furthermore, a swivel stop  283  is provided on the connecting piece  232 , which limits the swiveling movement of the connecting piece in the direction of a position aligned with a guide contour  255  of the suction device  230 . For example, the swivel stop  283  is formed by a flange projection that strikes an outer peripheral surface of the base body  240 . 
     The base body  240  essentially corresponds to the base bodies  40 ,  140  and has, for example, the plug-in receptacle  61  and a further plug-in receptacle  62  delimited by the side legs  244  that are functionally identical to side legs  44 ,  144 . 
     A latching contour  269  for engaging in the plug-in receptacle or latching receptacle  29  of the machine guide body  22  is provided on the bottom of the plug-in receptacle  62 , for example. 
     Furthermore, latching means  266  are provided, which are designed functionally similarly to latching means  66 , but have latching projections  267  and can be operated easily using actuating portions  276 . 
     The plug-in receptacles  61 ,  62  and the latching means  266  form fastening means  260  and/or form-fitting latching means  263  of the suction device  230 . 
     The latching projections  267  have latching contours  268 , for example hook contours, on their free end regions provided for engagement in the latching receptacles or machine plug-in receptacles  28 . The hook contours or latching contours  268  can be disengaged and engaged with the plug-in receptacles or latching receptacles  28  by a displacement movement R ( FIG.  13   ). 
     The latching projections  267  have bearing portions  272  which are displaceably mounted with respect to the movement R in bearing receptacles  271  of slide bearings  270 . The bearing receptacles  271  are located, for example, on or in the region of the bottom wall  243  of the base body  240 . 
     The latching projections  267  are biased by springs  273  in the direction of their latching position. Only one spring is shown in  FIG.  13   , with the latching projection  267  also having such a spring in the drawing on the right. The springs  273  rest on support projections  274  of the bearing portions  272  or the latching projections  267  and on a support surface  275  of the bearing receptacle  271 . The support surfaces  275  limit the release movement of the latching projections  267  and opposite stops  278  of the bearing receptacles  271  limit the movement of the latching projections  267  in the direction of their latching position. Stops  277  of the latching projections  267  strike against the stops  278  and protrude in front of the actuating portions  276 , for example. 
     The actuating portions  276  have actuating surfaces which are arranged on the outer sides of the side legs  244  of the base body  240 . Thus, an operator can easily actuate the actuating surfaces with a kind of pinching movement of his fingers on one another in order to disengage the latching projections  267  from the latching receptacles or machine plug-in receptacles  28 . 
     The guide contour  55  lies in a guide plane FF or spans a guide plane FF in the region of the sawing tool  15 , for example in the region of the recess  47  when the suction device  30 ,  130 ,  230  is fastened to the machine guide body  22 . The guide plane FF is that plane on which the suction device  30 ,  130 ,  230  is supported on the workpiece W in the region of the sawing tool  15 . In principle, it is now possible for a longitudinal axis LA of the connection body  32 A,  132 A,  232 A to run parallel to the guide plane FF. However, an angle Wl between the longitudinal axis LA and the guide plane FF is preferred, for example a fixed angle in a range from 15° to 80°. Thus, the suction hose  91  can run obliquely away from the suction device  30 ,  130 ,  230  past the machine housing  17 A. However, the angle Wl can also be variable, for example using a pivot bearing arrangement. Such a pivotability or change in the position of the longitudinal axis LA with respect to the guide plane FF is shown in  FIG.  12    as an example, which is implemented using the pivot bearing  280 .