Source: https://patents.google.com/patent/DE3742965A1/en
Timestamp: 2020-07-06 21:58:52
Document Index: 663433036

Matched Legal Cases: ['art 5', 'art 7', 'arts 7', 'art 7', 'art 7', 'arts 7', 'art 7', 'arts 7', 'art 7', 'art 5']

DE3742965A1 - Linear guide - Google Patents
DE3742965A1
DE3742965A1 DE19873742965 DE3742965A DE3742965A1 DE 3742965 A1 DE3742965 A1 DE 3742965A1 DE 19873742965 DE19873742965 DE 19873742965 DE 3742965 A DE3742965 A DE 3742965A DE 3742965 A1 DE3742965 A1 DE 3742965A1
DE19873742965
Shizuo Kashiwagi
1986-12-29 Priority to JP61315643A priority Critical patent/JPS63169241A/en
1987-12-18 Application filed by NSK Ltd filed Critical NSK Ltd
1988-07-14 Publication of DE3742965A1 publication Critical patent/DE3742965A1/en
239000011805 balls Substances 0.000 claims description 51
The invention relates to a linear leadership direction with a guide rail that has a number of Rolling grooves for rollers in the axial direction a slider that is guided by the guide rail and with a number of rolling grooves for rollers is equipped with the corresponding rolling grooves opposite the guide rail, and with a number of rollers that can be rolled into the rolling grooves of the Slider and the guide rail are inserted.
Such a linear guide device comprises generally a guide rail, a slider, the is movable along the guide rail and a number of balls between the guide rail and the Are inserted. The slider moves as smoothly as possible along the guide rail in follow the rolling motion of the balls. Because the sliding resistance level of the slider is very low, it is temporary difficult to slide the slider in a desired position to stop. For this reason, there is generally one Braking device between the slider and the Füh rail available.
Such linear guide devices are at for example in the Japanese use disclosed pattern 83-6 010 and Japanese Patent Application Laid-Open 86-11 611 by the same applicant as in the present application.
In the first mentioned publication there is a Plain bearings made of a low friction material manufactures and equipped with a spring that between a guide rail and a slide between is switched, so the frictional resistance between the Guide rail and the slider around a certain Increase amount and a damping force at the time of stopping to deliver after the slider has moved a given distance.
In the second document, a Friction piece loaded by a spring part, which on a Surface of the slider against that of the guide rail is attached, and the friction part can using a screw away from the guide rail moved or brought into contact with the guide rail will. While mounting the slider on the Guide rail becomes the friction part by the screw kept away from the guide rail to assemble to enable. After assembly, the screw removed the friction part in contact with the guide bring guide rail and against the guide rail to press so that the damping force at the time of holding the slider is generated after this has moved a predetermined distance.
With the two known linear guide devices There are disadvantages, because the damping force to Time of holding the slider by the pressure is exerted by the spring in such a way that the Damping force is set to a predetermined value and that it is not possible the braking characteristic to change. Another disadvantage is that the pressure force of the Spring sinks as a result of aging and it swells rig, the slider in a fixed predetermined Stop position. In addition, changes in the spring tension of the spring occur, it is difficult maintain a predetermined value of the damping force received, and furthermore there is an unsolved Problem in the way that the spring is not directly as a Brake to stop the slider can be used can, after this is in a predetermined position has moved. This results if such known linear guiding device in machines tools for high-performance cutting is used, the braking force being adjusted to be the Working condition is adjusted, a large braking force is exercised even under such conditions the running table returns to its starting position, without the work being done or the running table accesses the workpiece. It will be a big one Loss of energy causes when the table is moving quickly moved, and likewise the standard time or the life duration of the machine is shortened because of the delivery screw applied load during the time of fast Leadership is great.
The object of the present invention is a linear guide device of the type described Way of improving so that the braking force is adjustable, that no braking force between the slider and the Guide rail during the movement of the slider is exercised and that the braking force is only effective is exercised when the slider after movement stops by a predetermined distance.
According to the invention, this object is achieved by that in a surface of the slider that the guide opposite rail, a recess is formed, that a printing mechanism is arranged in the receptacle and a compressive force on an upper surface of the guide exercise rail that is opposite the slider, and that a pressure source via a pressure setting device device is coupled to the printing mechanism and the Pressure adjustment device excites the pressure force.
The advantage of the invention is that a frictional resistance between the guide rail and the slider can be regulated. The one in the glide existing pressure mechanism exerts a compressive force against the opposite surface of the guide rail out, and this pressing force of the printing mechanism becomes set by the pressure setting device. To that extent the pressure force of the printing mechanism can vary depending speed depending on the operating condition of the slider be chosen. If the pressure force is chosen to be relatively large, to create a frictional resistance between the slider and the guide rail to increase, the Druckmecha nism directly or positively as a clamp at the time stopping the moving slider will. By adjusting the pressure force of the pressure mecha nism can be the resilience of the printing mechanism during normal movement of the slider on one predetermined value can be set, which for the Bewe suitable, but also resistance Force essentially to be set to zero.
The invention is illustrated below with the aid of two embodiments shown in the drawing explained. It shows
Fig. 1 is a front view of an execution form of the invention, half in section,
Fig. 2 is a sectional view taken along the line II-II in Fig. 1, and
Fig. 3 is a sectional view of another imple mentation form of the invention.
In Fig. 1, a guide rail 1 in the axial (longitudinal) direction thereof, and receiving holes 3 are drilled from an upper surface 2 of the guide rail 1 at predetermined intervals along the axial direction ge. The guide rail 1 is connected by means of fastening bolts 4 to a stationary part 5 . In each of the two side surfaces of the guide rail 1 , two rolling parts or ball rolling grooves 1 a and 1 b are formed, which have a semicircular cross section and are separated from each other in the vertical direction by a predetermined distance. The rolling grooves 1 a , 1 a and 1 b , 1 b in the two side surfaces of the guide rail 1 are symmetrical and extend parallel to one another in the axial direction. In the sole of each of the ball rolling grooves 1 a , 1 b and 1 a , 1 b , a retaining bracket slot 1 d is formed for receiving a retaining bracket 1 c from a piano wire or the like.
A slider 7 is slidably mounted on the guide rail 1 . The slider 7 includes a slider body 7 a , end plates 7 b and 7 c , which limit opposite longitudinal end faces of the slider body 7 a . The slider body 7 a consists of an upper plate part 7 b and vertical plate parts 7 e and 7 f , which extend vertically downward from the two side surfaces of the upper plate part 7 d . The slider body 7 a has an inverted U-shaped cross section. A recess 8 is formed in the lower surface of the upper plate part 7 d , and the recess 8 is defined, for example, by a cylindrical inner surface, the axis of which extends in the vertical direction. A pressure vessel 9 serves as a pressure mechanism and also has a cylindrical shape and consists of an elastic material such as synthetic rubber, synthetic leather, thin-walled metal or the like and is accommodated in the recess 8 . The pressure vessel 9 is liquid-tight. On the lower surface of the pressure vessel 9 , a friction disk or plate 6 made of a relatively rigid and wear-resistant material such as metal, plastic resin or the like is attached. The friction plate 6 is attached by gluing or the like technology. Sealing plates 7 g and 7 g are attached to the end plates 7 b and 7c . Lower surface seals 7 h and 7 h are attached to the lower surfaces of the vertical plate parts 7 e and 7 f .
The pressure vessel 9 is in communication with a hydraulic pressure source 13 through an opening 10 , which laterally penetrates the upper plate part 7 d , a flexible hydraulic line 11 and a pressure control valve 12 , which serves as a control device for the pressure force. The pressure within the pressure vessel 9 is regulated by regulating the pressure control valve 12 , where force is regulated by the pressure exerted on the guide rail 1 .
Kugelabrollnuten 10 a and 10 b in the inner surface 7 of each of the vertical plate parts e and 7f formed at positions corresponding to the Kugelabrollnuten 1 a and 1 b in accordance with the guide rail. 1 The ball rolling grooves 10 a and 10 b also have a semicircular cross section. Ball return passages 14 a and 14 b with a circular cross-section are formed within a thick wall part of each of the vertical plate parts 7 e and 7 f in the axial direction. The ball return passages 14 a and 14 b correspond to the ball rolling grooves 10 a and 10 b . As can be seen from Fig. 2, the opposite ends of each of the ball return passages 14 a and 14 b are in connection with curved ball passages 15 a and 15 b . The curved ball passages 15 a and 15 b are spaces in the shape of half beads, forms out in the end plates 7 b and 7 c . One end of each of the curved ball passages 15 a and 15 b of the ball return passage 14 a is in connection with the corresponding end of a ball rolling path consisting of the ball rolling groove 1 a of the guide rail 1 and the ball rolling groove 10 a of the vertical plate part 7 f of the slider 7 . In other words, this means that a ball recirculation path from the ball return passage 14 a and the curved ball passages 15 a and 15 b is formed. The ball return passage 14 b is formed in the same way. A plurality of balls 16 as rolling parts are inserted into the ball circulation paths and into the ball rolling paths, formed from the ball rolling grooves 1 a , 10 a and 1 b and 10 b of the guide rail 1 and the slider 7 . In this case, the balls 16 are inserted into the ball rolling paths, and the balls 16 are loosely inserted into the ball circulation paths. The balls 16 are from the Kugelab rolling paths to the curved ball passages 15 a and 15 b in the end plates 7 b and 7 c inserted through the bracket 1 c , so that the balls 16 roll and run largely without friction. The bracket 1 c serves as a device for preventing the balls 16 from falling out of the slider 7 .
The assembly of the slider 7 on the guide rail 1 is carried out in such a way that the hydraulic line 11 is detached from the implementation 10 of the slider 7 . At this time, the pressure inside the pressure vessel 9 is kept at atmospheric pressure. Thus, there is essentially no frictional resistance between the friction plate 6 of the pressure vessel 9 and the upper surface 2 of the guide rail 1 , and the slide 7 can slide on the guide rail 1 , with very little force being exerted on the slide 7 . The result of this is that bringing the slider 7 to the guide rail 1 can be carried out easily. After mounting the slider 7 on the guide rail 1 , the hy draulic line 11 is again ruled out to the slider 7 .
The operation of the embodiment is described below. If the slider 7 attached to the guide rail 1 is moved backwards, for example, in the axial direction, then roll between the ball rolling grooves 1 a and 10 a and between the ball rolling grooves 1 b and 10 b of the guide rail 1 and the sliding piece 7 inserted balls 16 as a result of Movement of the slider 7 and move in the opposite direction to the slider 7th On the front end of the slider 7 , the balls 16 are guided through the bracket 1 c and enter the curved ball passage 15 a of the end plate 7 b . The balls 16 undergo a U-shaped movement along the curved ball passage 15 a to pass into the ball return guide passage 14 a . After passing through the ball return passage 14 a , the balls 16 again perform a U-shaped movement through the curved ball passage 15 b of the end plate 7 c and move in the ball rolling path between the ball rolling grooves 1 a and 10 a of the guide rail 1 and the sliding piece 7 so to circulate. Due to this movement movement of the balls 16 , the slider 7 can be kept in motion with little force.
In this state, the hydraulic pressure source 13 is actuated, and the hydraulic pressure acting on the pressure vessel 9 is regulated in a suitable manner by the pressure control valve 12 , so that the pressure inside the pressure vessel 9 is higher than the atmospheric pressure. In this way, the pressure within the pressure vessel 9 is regulated higher than the atmospheric pressure. The upper surface and the side surfaces of the pressure vessel 9 are limited by the recess 8 of the slider 7 be. As a result, the pressure inside the pressure vessel 9 expands the lower surface of the pressure vessel 9 downward, as a result of which the friction plate 6 is pressed against the upper surface 2 of the guide rail 1 . Accordingly, a frictional resistance pro portional to the pressure between the friction plate 6 on the lower surface of the pressure vessel 9 and the guide rail 1 is generated.
By setting the pressure to a value near the atmospheric pressure by the pressure control valve 12 , it is possible to move the slider 7 with a relatively small friction resistance. Is the set chosen by the pressure regulating valve 12, so the frictional resistance increases accordingly, and it is possible to achieve a damping effect according to the weight of the slide piece 7, and an object while holding the movement fixed to the slider 7 of the slider. 7 If the set pressure is further increased by the pressure control valve 12 , it is possible to use the pressure vessel 9 as a brake for the slide 7 , and at the same time it is possible to hold and secure the slide on the guide rail 1 when it is stopped becomes.
Furthermore, when lowering the setting pressure by the pressure control valve 12 during the movement of the slider 7 and by increasing the set pressure of the pressure control valve 12 at the time of the completion of the movement, it is possible to perform the movement of the slide with little force or a Make quick braking when the slider 7 is stopped in its movement.
Although the pressure vessel 9 is used as a pressure mechanism in the embodiment described, the invention is in no way limited to this, but rather, as is shown in the further embodiment according to FIG. 3, it is possible for the pressure vessel 20 to have a pantograph-shaped cross section, that is a cross section similar to a pantograph, and expands vertically with a friction plate 21 attached to the lower surface of the pressure vessel. It is also possible to use a pressure vessel similar to a pressure bellows.
Optionally, instead of the pressure vessel 9 or 20 , inserted into the recess 8 , a piston can be inserted, at the tip of which a friction plate is attached. Furthermore, the opening part of the recess 8 of the slider 7 can be closed liquid-tight ver, by gluing a friction-resistant elastic part, which includes synthetic rubber, plastic resin, synthetic leather, thin-walled metal and the like. The operating fluid is not limited to hydraulic oil, water or other liquids, air or other gases can also be used. The shape of the recess 8 is not limited to a cylindrical shape and can have any arbitrary shape such as square, triangular or the like.
In the embodiment described above, the pressure mechanism is provided in the slider 7 and arranged so that it opposes the upper surface of the guide rail 1 . However, the invention is not limited to this configuration, but the pressure mechanism can also be accommodated in the vertical plate part of the slider 7 so that it faces the side of the guide rail 1 or the fixed part 5 .
The rolling elements do not have to be balls, rather, rolls or rollers or the like can also be used Elements are used.
As described above, the exception is mung formed in the surface of the slider, the faces the guide rail and it is further a printing mechanism is arranged in the recess. The The pressure mechanism of the printing mechanism is using a Adjustable pressure force device, and by Adjusting the pressure force of the printing mechanism can the frictional resistance between the slider and the Guide rail can be changed as desired. So can the damping effect at the time of stopping the Slider can be reached after movement. The slider is used as a moving table of a machine tool or the like is used, it is possible the loss of power by adjusting the pressure force in the way that there is no frictional resistance between the Running table and the guide rail occurs other. At the same time, the service life of the machine is extended Reduce the load on the feed screw or on the bearing that supports the feed screw increases. Another advantage results from the fact that Adjusting the compressive force it is possible to brake the exercise positive if the slider after the Movement is stopped and it is also possible secure the slider on the guide rail.
1.Linear guide device with a guide rail which has a number of rolling grooves for running rollers in the axial direction, a sliding piece which is guided by the guide rail and is equipped with a number of rolling grooves for running rollers which are opposite the corresponding rolling grooves of the guide rail, and with a number of rollers which can be rolled into the rolling grooves of the sliding piece and the guide rail, characterized in that a recess ( 8 ) is formed in a surface of the sliding piece ( 7 ) which is opposite the guide rail ( 1 ), that a pressure mechanism ( 9; 20 ) is arranged in the recess ( 8 ) and exerts a pressure force on an upper surface ( 2 ) of the guide rail ( 1 ), which is opposite the slide ( 7 ), and that a pressure source ( 13 ) a Druckeinstellein direction ( 12 ) with the pressure mechanism ( 9, 20 ) is coupled ge and the pressure adjustment device regulates the pressure force.
2. Device according to claim 1, characterized in that a friction disc ( 6; 21 ) with elastic properties shafts is attached to a lower surface of the printing mechanism so that the friction disc bears against an upper surface ( 2 ) of the guide rail ( 1 ).
3. Apparatus according to claim 1, characterized in that the slider ( 7 ) consists of a slider body ( 7 a) and end plates ( 7 b , 7 c) which complete the opposite longitudinal end faces of the slider body ( 7 a) .
4. The device according to claim 3, characterized in that the slider body ( 7 a) has an inverted U-shaped cross section and consists of an upper plate part ( 7 d) and vertical plate parts ( 7 e , 7 f) , which are different from the two Extend the side parts of the upper plate part ( 7 d) vertically downwards.
5. Device according to claims 3 and 4, characterized in that on the end plates (7 b, 7 c) sealing plates (7 g, 7 g) are fixed, and that on the lower surfaces of the vertical plate parts (7 e, 7 f ) Seals ( 7 h , 7 h) are attached.
6. The device according to claim 4, characterized in that in the vertical plate parts ( 7 e , 7 f) ball return guide passages ( 14 a , 14 b) are formed with ball rolling grooves ( 10 a , 10 b) in the inner surface of the vertical plate parts ( 7 e , 7 f) correspond and together with this form part of a closed ball rolling path, along which balls ( 16 ) circulate.
DE19873742965 1986-12-29 1987-12-18 Linear guide Ceased DE3742965A1 (en)
JP61315643A JPS63169241A (en) 1986-12-29 1986-12-29 Linear guide device
DE3742965A1 true DE3742965A1 (en) 1988-07-14
ID=18067832
DE19873742965 Ceased DE3742965A1 (en) 1986-12-29 1987-12-18 Linear guide
US (1) US4773770A (en)
JP (1) JPS63169241A (en)
DE (1) DE3742965A1 (en)
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