Patent Publication Number: US-9849574-B2

Title: Hand-held power tool

Description:
FIELD OF THE INVENTION 
     The present invention relates to a hand-held power tool for operation in hammer-drilling, drilling and screwing modes, which includes a mode-setting device having an actuating element and a setting element, as well as a gear unit for driving an output shaft; the actuating element and the setting element being interconnected in a rotatably fixed manner, and, at least in one operating mode, the setting element being coupled to a transmission element, which is supported at a coupling housing assigned to the gear unit and, in a screwing position associated with the screwing mode, is axially displaceable at the coupling housing and, in hammer-drilling and drilling positions associated with the hammer-drilling and drilling modes, is axially fixed at the coupling housing. 
     BACKGROUND INFORMATION 
     Such a hand-held power tool, which includes a driving device provided for driving an output shaft that has a drive unit and a gear unit coupled to the drive unit, is discussed in EP 1 555 091 A2. This hand-held power tool may be operated in different operating modes, which include a hammer-drilling, a drilling and a screwing mode. In the hammer-drilling and drilling modes, there is a rigid torque coupling between the output shaft and the driving device, whereas in the screwing mode, at most, a settable torque may be transmitted. A mode-setting device is used for setting the operating modes, the mode-setting device including a mode-setting sleeve rotatable via manual manipulation, as well as a transmission element, which is coupled to the mode-setting sleeve in a rotatably fixed manner and is supported on a coupling housing assigned to the gear unit. The mode-setting sleeve and the transmission element are supported so as to be able to rotate about the longitudinal axis of the output shaft, so that the transmission element executes corresponding rotary setting movements of the mode-setting sleeve. Consequently, each of the different operating modes is assigned a respective, predetermined rotational position of the mode-setting sleeve and the transmission element. 
     A disadvantage of the related art is that there is normally a predetermined axial free space between the transmission element and the mode-setting sleeve, which may increase in size over the service life of the hand-held power tool, due to abrasion. Therefore, a reliable and precise mode-setting position over a comparatively long operating period of the hand-held power tool is only achievable with difficulty. 
     SUMMARY OF THE INVENTION 
     Therefore, an object of the present invention is to provide a new hand-held power tool for operation in hammer-drilling, drilling and screwing modes, where the operating modes of the hand-held power tool are also reliably settable over a long period of operation. 
     This object may be achieved by a hand-held power tool for operation in hammer-drilling, drilling and screwing modes, the hand-held power tool including a mode-setting device having an actuating element and a setting element, as well as a gear unit for driving an output shaft. The actuating element and the setting element are interconnected in a rotatably fixed manner, and, at least in one operating mode, the setting element is coupled to a transmission element, which is supported at a coupling housing assigned to the gear unit and, in a screwing position associated with the screwing mode, is axially displaceable at the coupling housing and, in hammer-drilling and drilling positions associated with the hammer-drilling and drilling modes, is axially fixed at the coupling housing. The transmission element is connected to the coupling housing in a rotatably fixed manner, and a predefined operating mode may be set by rotating the setting element. The setting element and transmission element may rotate relative to one another, and the setting element embraces the transmission element at least sectionally. 
     Thus, the present invention allows a hand-held power tool to be provided, which may be produced with a reduced size and a reduced number of component parts and has a robust and reliable mode-setting device, via which different operating modes may be reliably set over a long operating period. 
     According to one specific embodiment, the transmission element is formed in the shape of a disk. 
     This may allow a sturdy and compact mode-setting device to be provided. 
     The transmission element may include fixing elements, by which the transmission element is fixed in position at the coupling housing in a rotatably fixed manner. 
     Consequently, the transmission element may be safely and reliably locked in position at the coupling housing in a rotatably fixed manner. 
     The fixing elements may have extensions, which are directed radially outwards, and by which the transmission element is fixed axially in position at the coupling housing in the hammer-drilling and drilling modes. 
     Therefore, in the hammer-drilling and drilling modes, the transmission element may be axially fixed in position at the coupling housing in a simple manner. 
     According to one specific embodiment, the setting element is fixed in position at the coupling housing so as to be essentially immovable in the axial direction. 
     Thus, the present invention allows a hand-held power tool having a compact design and a comparatively reduced overall length to be provided. 
     The setting element may be formed in the shape of a sleeve. 
     This allows a simple and inexpensive setting element to be provided. 
     According to one specific embodiment, the setting element includes fastening elements, which are configured to permit or prevent the axial displaceability of the transmission element at the coupling housing. 
     Thus, the present invention allows a mode-setting device produced using a reduced number of component parts to be provided. 
     The fastening elements may include retaining elements, which are configured to axially fix the setting element in position at the coupling housing. 
     Consequently, the setting element may be axially fixed in position at the coupling housing in a simple manner. 
     The fastening elements may include blocking elements, by which, in the hammer-drilling and drilling modes, the transmission element is axially fixed in the corresponding hammer-drilling or drilling position at the coupling housing; in the screwing mode, the blocking elements releasing the transmission element in the axial direction. 
     Therefore, the axial displaceability of the transmission element at the coupling housing may be allowed or prevented safely and reliably. 
     According to one specific embodiment, force-transmission elements for axially transmitting force from the setting element to the coupling housing in at least one operating mode are provided at the coupling housing. 
     Consequently, the present invention allows a mode-setting device to be provided, in which a displacement may be limited or a force introduced via the output shaft may be received by the setting element. 
     According to one specific embodiment, the output shaft is assigned a stop mechanism for producing percussion in the hammer-drilling mode, and the setting element has deactivation elements for deactivating the stop mechanism. 
     Consequently, the present invention allows a single setting element to be provided, by which both deactivation of a torque coupling assigned to the hand-held power tool and deactivation of a locking mechanism assigned to the hand-held power tool may be carried out safely and reliably. 
     The setting element may be connected to the coupling housing by a bayonet joint. 
     This allows sturdy and robust attachment of the setting element to the coupling housing. 
     The actuating element may be formed in the manner of an actuating sleeve rotatable via manual manipulation. 
     Thus, a simple and reliable actuating element may be provided. 
     According to one specific embodiment, the setting element and the actuating element are formed in one piece. 
     This allows a robust and inexpensive, combined setting and actuating element to be provided. 
     According to one specific embodiment, at least one spring element is provided, which is configured to axially apply a predefined spring force to the transmission element in the direction of the hammer-drilling and drilling positions. The predefined spring force may be adjustable within specified limits by a corresponding torque setting device. 
     Therefore, the present invention allows a safe and reliable torque coupling to be provided. 
     The present invention is explained in further detail in the following description, on the basis of exemplary embodiments illustrated in the drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows a perspective view of a detail of a hand-held power tool, including a gear unit, a mode-setting device, as well as a torque-setting device according to the present invention. 
         FIG. 2  shows a first sectional view of the detail of the hand-held power tool of  FIG. 1 . 
         FIG. 3  shows a second sectional view of the detail of the hand-held power tool of  FIG. 1 . 
         FIG. 4  shows a simplified perspective view and a sectional view of the detail of the hand-held power tool of  FIG. 1  in the screwing mode. 
         FIG. 5  shows a simplified perspective view and a sectional view of the detail of the hand-held power tool of  FIG. 1  in the drilling mode. 
         FIG. 6  shows a simplified perspective view and a sectional view of the detail of the hand-held power tool of  FIG. 1  in the hammer-drilling mode. 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 1  shows a hand-held power tool  100  for operation in hammer-drilling, drilling and screwing modes in accordance with the present invention. To simplify the drawing, hand-held power tool  100  is only illustrated sectionally, in light of a gear unit  120 , a mode-setting device  150  having a setting element  110 , a torque-setting device  160 , as well as an output shaft  140 . 
     According to one specific embodiment, hand-held power tool  100  has a driving device, e.g., an electric drive motor, for driving gear unit  120 . An angular motion of the drive motor is transmitted to output shaft  140 , which is illustratively formed in the manner of a tool spindle, and to which, e.g., a chuck may be attached for receiving an insertable tool. Gear unit  120  is situated, for example, in a gear housing  122 , which is connected to a coupling housing  130  and may form coupling housing  130  at least in sections. 
     For purposes of illustration, coupling housing  130  is formed in the shape of a sleeve and has, at its circumference, an annular collar  180 , which takes the form of a retaining element that is at least sectionally formed in the shape of a shoulder. Annular collar  180  is provided, for example, with discontinuities  182 ,  184 ,  186  ( FIGS. 4 through 6 ) and has force transmission elements  183 ,  185 ,  187 , which are formed, for example, in the manner of axially oriented extensions on annular collar  180  and are used for axially transmitting force from setting element  110  to coupling housing  130  in at least one operating mode. According to one specific embodiment, on its side facing away from gear housing  122 , annular collar  180  forms an annular support surface  189  for a transmission element  170 , the annular support surface being formed in the shape of a groove in the region of force transmission elements  183 ,  185 ,  187 . In addition, e.g., axially oriented grooves  481 ,  486 , as well as  482 - 485  ( FIGS. 4 to 6 ), are provided at coupling housing  130 . 
     According to one specific embodiment, transmission element  170  is formed to be disk-shaped, in the manner of a pressure plate or a thrust ring, and therefore, it is referred to as such in the following. As illustrated, thrust ring  170  has fixing elements  177 ,  172 ,  173 ,  174 , as well as  175 - 176  ( FIGS. 4 and 5 ) and  471 ,  476  and  472 - 475 , by which thrust ring  170  is fixed in position at coupling housing  130  in a rotatably fixed manner. These have, for example, projections  177 ,  172 ,  173 ,  174  and  175 - 176  ( FIGS. 4 and 5 ) directed radially outwards and bulbous extensions  471 ,  476  and  472 - 475  ( FIGS. 4 through 6 ) directed radially inwards. The extensions  471 ,  476  and  472 - 475  ( FIGS. 4 through 6 ) directed radially inwards are situated in axially oriented grooves  481 ,  486  and  482 - 485  ( FIGS. 4 through 6 ) of coupling housing  130 . In each instance, the projections  177 ,  172 ,  173 ,  174  and  175 - 176  ( FIGS. 4 and 5 ) directed radially outwards embrace, in pairs, a corresponding force transmission element  183 ,  185 ,  187  of coupling housing  130 . For example, projections  172 ,  173  embrace force transmission element  183 . In addition, in the hammer-drilling and drilling modes, the projections  177 ,  172 ,  173 ,  174  and  175 - 176  ( FIGS. 4 and 5 ) directed radially outwards are configured to allow thrust ring  170  to be axially fixed in position at coupling housing  130 , as described below. In the screwing mode, thrust ring  170  may execute an axial positioning movement with respect to coupling housing  130  and setting element  110 , as described below with regard to  FIGS. 4 through 6 . 
     As illustrated, mode-setting device  150  has, for example, a sleeve-shaped actuating element  155  that is, therefore, also referred to below as an actuating sleeve or mode-setting sleeve, as well as the setting element  110 , which is connected to it in a rotatably fixed manner and, as illustrated, is also sleeve-shaped and also referred to in the following as a switching sleeve. An example of the attachment of actuating sleeve  155  to switching sleeve  110  via radial extensions ( 491 ,  493 ,  495  in  FIGS. 4 through 6 ) provided on switching sleeve  110  is described with reference to  FIGS. 4 through 6 . Actuating sleeve  155  is supported at coupling housing  130  via switching sleeve  110 , so as to be able to rotate about the longitudinal axis of output shaft  140 . The operating modes of hammer-drilling, drilling and screwing may be set by appropriately rotating actuating sleeve  155  and, consequently, switching sleeve  110 . 
     Switching sleeve  110  is essentially fixed in position at coupling housing  130 , in the axial direction of output shaft  140 . However, for tolerance reasons, axial play may be advantageous for seating on actuating sleeve  155 . According to one specific embodiment, switching sleeve  110  has fastening elements  111 ,  112 ,  113 , ( FIGS. 4 and 6 ),  114 ,  115 ,  116 , which are configured to allow or prevent the axial displaceability of thrust ring  170  at coupling housing  130 . As illustrated, these fastening elements  111 ,  112 ,  113  ( FIGS. 4 and 6 )  114 ,  115 ,  116  have rib-like retaining elements  112 ,  114 ,  116  directed radially inwards, which are also referred to in the following as retaining ribs, as well as rib-like blocking elements  111 ,  115  and  113  ( FIGS. 4 through 6 ), which are also referred to in the following as blocking ribs. As illustrated, blocking ribs  111 ,  115  and  113  ( FIGS. 4 through 6 ) are formed with an axial orientation, at a circumferential collar  105 , which is provided at an inner circumference of switching sleeve  110  and is directed radially inwards. As an alternative to this, blocking ribs  111 ,  115  and  113  ( FIGS. 4 through 6 ) may be implemented as projections that are formed at the inner circumference of switching sleeve  110  and are directed radially inwards. As described with regard to  FIGS. 5 and 6 , in the hammer-drilling and drilling modes, thrust ring  170  is axially locked in a corresponding hammer-drilling or drilling position at coupling housing  130 , by blocking ribs  111 ,  115  and  113  ( FIGS. 4 through 6 ). In the screwing mode, blocking ribs  111 ,  115  and  113  release thrust ring  170  in the axial direction, as described in  FIG. 4 . In addition, as illustrated, switching sleeve  110  has rib-like deactivation elements  117 ,  118 ,  119 , which are formed on an end face of switching sleeve  110  and form a positioning contour, as described below in regard to  FIG. 2 . 
     When switching sleeve  110  is mounted on coupling housing  130 , switching sleeve  110  is slid onto coupling housing  130  in such a manner, that retaining ribs  112 ,  114 ,  116  initially reach through discontinuities  182 ,  184  and  186  ( FIG. 4 ) at the outer surface of thrust ring  170 . Switching sleeve  110  is then rotated clockwise, for example, so that retaining ribs  112 ,  114 ,  116  reach behind annular collar  180  and, consequently, together with blocking ribs  111 ,  115  and  113  ( FIGS. 4 through 6 ), axially fix switching sleeve  110  in position at annular collar  180  in the manner of a bayonet joint. In addition, a locking element, which allows switching sleeve  110  to be locked into assigned rotational positions at coupling housing  130 , is situated between switching sleeve  110  and coupling housing  130 ; these rotational positions being associated with the different operating modes of hand-held power tool  110 . However, it should be pointed out that suitable locking elements are sufficiently well-known to one skilled in the art, e.g., locating springs, so that for reasons of conciseness of the specification, a detailed description of a specific locking element is omitted, here. 
     As illustrated, torque-setting device  160  has a torque-setting sleeve  165 , which is positioned after actuating or mode-setting sleeve  155  in the axial direction of output shaft  140  and may be actuated independently of it, i.e., may be rotated about the longitudinal axis of output shaft  140 . Using torque-setting sleeve  165 , the maximum transmittable torque of hand-held power tool  100  in the screwing mode may be set. 
       FIG. 2  shows a sectional view of the detail of hand-held power tool  100  of  FIG. 1 , including gear unit  120 , mode-setting device  150 , torque-setting device  160  and output shaft  140 , where the cut is made approximately perpendicular to the plane of the paper. Gear unit  120  takes the form, for example, of planetary gearing including three planet stages. Since the basic design and the method of functioning of planetary gears is sufficiently well-known to one skilled in the art, a detailed description is omitted here for the sake of simplicity of the specification. 
     According to one specific embodiment, torque-setting sleeve  165  of torque-setting device  160  is axially fixed in position at coupling housing  130 , and its internal thread engages with the external thread of a spring retaining ring  213 , which is seated on coupling housing  130  in a rotatably fixed, but axially movable manner. This is accomplished, for example, with the aid of screws  221  and  422 ,  423  ( FIGS. 4 through 6 ), which connect a retaining plate  222  to coupling housing  130 . Plate  222  encompasses output shaft  140  and pushes a locating spring retainer  219  against an annular shoulder in torque-setting device  165 , so that in this manner, torque-setting device  165  is also axially secured at coupling housing  130 . In order that torque-setting sleeve  165  locks into discrete locking positions in response to being rotated for setting a maximum transmittable torque, a locating spring element  220 , which is supported at locating spring retainer  219 , applies a force to the torque-setting sleeve; locating spring retainer  219  and locating spring element  220  being situated in the interior space encompassed by torque-setting sleeve  165 . Locating spring element  220  locks in discrete angular positions, for example, by acting upon a locking contour at the inner side of torque-setting sleeve  165 . 
     As illustrated, output shaft  140  is supported by two axially spaced ball bearings  214 ,  215  so as to be able to rotate with respect to coupling housing  130  and gear housing  122 . In addition to the angular motion, output shaft  140  may also execute an axial positioning movement with respect to coupling housing  130 . To this end, second ball bearing  215  is connected to output shaft  140  in an axially rigid manner and is supported inside of a locking jar  216  so as to be able to slide. First ball bearing  214  is positioned in coupling housing  130  so as to be attached to it. The axial positioning movement allows output shaft  140  to be moved between the hammer-drilling position and the drilling and screwing positions. In the hammer-drilling position, output shaft  140 , in  FIG. 2 , may be moved to the left, i.e., into coupling housing  130 . In this connection, locking jar  216  enters into locking engagement with locking disk  217 , which is seated on the surface of output shaft  140  in a rotatably fixed manner and forms a locking mechanism together with locking jar  216 . Locking disk  217  additionally has the task of axially fixing ball bearing  215  on output shaft  140 , the ball bearing also being seated on the surface of the output shaft. A spring element  218  is situated inside of locking jar  216 , the spring element forcing output shaft  140 , via a locking part  223  and ball bearing  215 , into an assigned, outer locking position, in which locking jar  216  and locking disk  217  are not in engagement. 
     One axial end of locking part  223  rests on switching sleeve  110 , and its other axial end rests on an outer ring assigned to ball bearing  215 . Switching sleeve  110  wraps around at least sections of the thrust ring  170 , which is illustratively situated in the interior of switching sleeve  110  and is directly supported on the support surface  189  formed at coupling housing  130 . Locking part  223  is used for making contact with the positioning contour formed on the end face of switching sleeve  110  by deactivation ribs  118  and  117 ,  119  ( FIG. 1 ), as well as for transmitting it to ball bearing  215 , and consequently, to locking disk  217 . In this connection, predefined axial changes in elevation in the positioning contour at switching sleeve  110 , which are caused by deactivation ribs  118  and  117 ,  119 , are transmitted to locking disk  217  via contact with locking part  223 , so that locking disk  217  experiences a corresponding axial change in position. In this manner, the locking engagement between locking disk  217  and locking jar  216  may be controlled. As illustrated, locking part  223  rests on deactivation ribs  118  and  117 ,  119  ( FIG. 1 ), so that locking disk  217  is axially set apart from the bottom of locking jar  216 , and consequently, the locking mechanism of hand-held power tool  100  is deactivated. This deactivation is carried out in the screwing mode ( FIG. 4 ) and in the drilling mode ( FIG. 5 ). In the hammer-drilling mode ( FIG. 6 ), locking part  223  does not rest on deactivation ribs  118  and  117 ,  119  ( FIG. 1 ), which means that locking disk  217  and locking jar  216  may enter into locking engagement, as described above. 
       FIG. 3  shows a sectional view of the detail of hand-held power tool  100  of  FIG. 1 , including gear unit  120 , mode-setting device  150 , torque-setting device  160  and output shaft  140 , where the cut is made approximately in the plane of the paper in  FIG. 1 .  FIG. 3  illustrates an exemplary embodiment of the switching sleeve  110  connected to coupling housing  130  by a bayonet joint, as described with regard to  FIG. 1 ; as illustrated, the retaining rib  112  directed radially inwards engaging with an annular groove  399 , which is provided in the region of annular collar  180  of coupling housing  130 . In addition, the projection  172  directed radially outwards, as well as a further projection  175  of thrust ring  170  directed radially outwards, is shown in  FIG. 3 . 
     According to one specific embodiment, hand-held power tool  100  has a spring device, which is formed by spring retaining ring  213  and several spring elements  311 ,  314  and  312 ,  313 ,  315 ,  316  ( FIGS. 4 through 6 ) and is configured to set a maximum transmittable torque in the screwing mode of hand-held power tool  100 . Spring elements  311 ,  314  and  312 ,  313 ,  315 ,  316  ( FIGS. 4 through 6 ) are positioned at coupling housing  130  so as to be distributed over the circumference, and take the form of, for example, helical compression springs. As illustrated, spring elements  311 ,  314  and  312 ,  313 ,  315 ,  316  ( FIGS. 4 through 6 ) extend between spring retaining ring  213  and thrust ring  170 . As illustrated, six studs, onto which spring elements  311 ,  314  and  312 ,  313 ,  315 ,  316  ( FIGS. 4 through 6 ) may be slipped, are situated on spring retaining ring  213 . As illustrated, only two studs, which are indicated by reference numerals  321 ,  324 , and onto which spring elements  311  and  314 , respectively, are slipped, are visible in  FIG. 3 . 
     Spring retaining ring  213  is, for example, axially displaceable relative to output shaft  140 , and in the event of a rotational movement of torque-setting sleeve  165 , it moves axially relative to output shaft  140 , due to the threaded connection with torque-setting sleeve  165 , which means that the initial stress of spring elements  311 ,  314  and  312 ,  313 ,  315 ,  316  ( FIGS. 4 through 6 ), which push thrust ring  170  against coupling housing  130  with an axial force corresponding to the initial stress, changes. Consequently, with increasing initial stress of spring elements  314  and  312 ,  313 ,  315 ,  316  ( FIGS. 4 through 6 ), the axial force, which is exerted by them on the thrust ring  170 , increases. 
     According to one specific embodiment, spring retaining ring  213 , spring elements  311 ,  314  and  312 ,  313 ,  315 ,  316  ( FIGS. 4 through 6 ) and thrust ring  170  form a torque coupling together with several balls  389  and a locking disk  391 , which is assigned to planetary gearing  120  and forms, as illustrated, a ring gear of a planet stage of planetary gearing  120 . As illustrated, balls  389  are supported in assigned openings  387  at coupling housing  130 , and in the axial direction of output shaft  140 , they are situated between an end face of locking disk  391 , at which a coupling structure  392  is formed, and thrust ring  170 . A suitable coupling structure may have, for example, a plurality of axial projections and is sufficiently well-known to one skilled in the art, so that in this case, a detailed description of coupling structure  392  is omitted for the sake of conciseness of the specification. In addition, the method of functioning of a suitable torque coupling is sufficiently well-known to one skilled in the art, so that in this case, a detailed description is also omitted for the sake of conciseness of the specification. 
       FIG. 4  shows a perspective top view of the output shaft  140  of  FIGS. 1 through 3  that is rotationally mounted in the coupling housing  130  of  FIGS. 1 through 3 , along with the mode-setting device  150  of  FIGS. 1 to 3 , for illustrating the setting of mode-setting device  150  for operation of hand-held power tool  100  of  FIGS. 1 through 3  in the screwing mode. In this screwing mode, actuating sleeve  155  and, along with it, switching sleeve  110  are rotated into a predefined screwing position. To simplify the view, an illustration of the torque-setting device  160  of  FIGS. 1 through 3  was omitted in  FIG. 4 . 
     In addition, a sectional view of coupling housing  130 , switching sleeve  110  and thrust ring  170  of  FIGS. 1 through 3  is shown in  FIG. 4 , the sectional view being cut in the region of blocking ribs  111 ,  113 ,  115  of switching sleeve  110 , in order to illustrate the interaction of these component parts in the screwing mode. As illustrated, coupling housing  130  has an approximately central opening  499  for guiding output shaft  140  through. 
       FIG. 4  illustrates the locking part  223  resting on deactivation ribs  117 ,  118 ,  119  of switching sleeve  110  in the screwing mode, as described in  FIG. 2 , as well as screws  221 ,  422 ,  423 , which are, for example, screwed down on coupling housing  130 . In addition,  FIG. 4  illustrates an exemplary, rotatably fixed connection of switching sleeve  110  to actuating sleeve  155  via radial extensions  491 ,  493 ,  495 , which are provided at the circumference of switching sleeve  110  and, as illustrated, engage with corresponding recesses  401 ,  403 ,  405  provided at the inner circumference of actuating sleeve  155 . However, it should be pointed out that other rotatably fixed connections between switching sleeve  110  and actuating sleeve  155  are also feasible. For example, one or more projections, which are directed radially inwards and engage with corresponding radial recesses or openings of switching sleeve  110 , may be formed at the inner circumference of actuating sleeve  155 . 
     According to one specific embodiment, in the screwing mode, at least sections of retaining ribs  112 ,  114 ,  116  of switching sleeve  110  are situated behind annular collar  180  of  FIG. 1 , and their blocking ribs  111 ,  113 ,  115  are situated between respective, corresponding projections  174 ,  175  and  176 ,  177  and  172 ,  173 , directed radially outwards. Consequently, blocking ribs  111 ,  113 ,  115  rest against force transmission elements  185 ,  187  and  183  of coupling housing  130  and release thrust ring  170  in the axial direction. Therefore, it may be axially displaced relative to coupling housing  130  by balls  389  from  FIG. 3 , in opposition to the force of spring elements  311 ,  312 ,  313 ,  314 ,  315 ,  316 , where the extensions  471 ,  472 ,  473 ,  474 ,  475 ,  476  of the thrust ring directed radially inwards slide in axially oriented grooves  481 ,  482 ,  483 ,  484 ,  485  and  486 , respectively, of coupling housing  130 . 
       FIG. 5  shows the perspective top view and the sectional view of  FIG. 4 , in which, in order to set mode-setting device  150  for operation of hand-held power tool  100  of  FIGS. 1 to 3  in the drilling mode, actuating sleeve  155 , and along with it, switching sleeve  110 , were rotated by a predefined angle, e.g., clockwise in  FIG. 5 , into an assigned drilling position. In the drilling mode, locking part  223  also rests on deactivation ribs  117 ,  118 ,  119  of switching sleeve  110 , as described in reference to  FIG. 2 . 
     According to one specific embodiment, in drilling mode, at least sections of retaining ribs  112 ,  114 ,  116  of switching sleeve  110  are situated behind annular collar  180  of  FIG. 1  in the line of sight given in  FIG. 5 , and their blocking ribs  111 ,  113 ,  115  block projections of the thrust ring directed radially outwards, that is, projections  175 ,  177  and  173 . Thus, in drilling mode, thrust ring  170  is axially fixed in position by blocking ribs  111 ,  113 ,  115  of switching sleeve  110  in the axial direction of output shaft  140  and is, accordingly, not axially displaceable. Consequently, the torque coupling is deactivated. 
       FIG. 6  shows the perspective top view and the sectional view of  FIGS. 4 and 5 , in which, in order to set mode-setting device  150  for operation of hand-held power tool  100  of  FIGS. 1 to 3  in the hammer-drilling mode, actuating sleeve  155 , and along with it, switching sleeve  110 , were rotated by a predefined angle, e.g., clockwise in  FIG. 6 , into an assigned hammer-drilling position. In the hammer-drilling mode, locking part  223  does not rest on deactivation ribs  117 ,  118 ,  119  of switching sleeve  110 , as described in the context of  FIG. 2 . 
     According to one specific embodiment, in the hammer-drilling mode, at least sections of retaining ribs  112 ,  114 ,  116  of switching sleeve  110  are situated behind annular collar  180  of  FIG. 1  in the line of sight given in  FIG. 6 , and their blocking ribs  111 ,  113 ,  115  block projections of the thrust ring directed radially outwards, that is, projections  175 ,  177  and  173  of  FIGS. 4 and 5 . Thus, in hammer-drilling mode, thrust ring  170  is axially fixed in position by blocking ribs  111 ,  113 ,  115  of switching sleeve  110 , in the axial direction of output shaft  140 , and is, accordingly, not axially displaceable.