Self-adaptive pneumatic clamp

Abstract

The self-adaptive pneumatic clamp comprises a fixed bottom plate, a clamping block A, an ejector rod A, a clamping block B, an ejector rod B, a sliding block A, a rack A, a sliding block B, a rack B, a driving device and a gear, the clamping block A and the clamping block B are arranged on the left side and the right side of the fixed bottom plate correspondingly, and the ejector rod A and the ejector rod B are arranged on the left side and the right side of the fixed bottom plate correspondingly; the sliding block A and the sliding block B are arranged on the left side and the right side of the fixed bottom plate respectively and can move front and back on the fixed bottom plate, the rack A is fixed to the sliding block A, the rack B is fixed to the sliding block B, the driving device is fixed to the fixed bottom plate, the rack A and the rack B are both meshed with the gear, and the driving device is connected with the gear. Only one side of the workpiece needs to be manually adjusted, the other end of the workpiece can be automatically adjusted, clamping and fixing of the workpiece are facilitated, and the clamping device is simple in structure and good in economical efficiency.

Description

Technical Field

[0001] The invention relates to an adaptive pneumatic clamp, belonging to the technical field of tooling clamps. Background Art

[0002] The Chinese invention patent application with application publication number CN118682674A discloses a bench vise with adjustable jaws, which is a clamp comprising a fixed jaw body and a movable jaw body, the fixed jaw body is arranged in parallel with the movable jaw body and is connected by a connecting piece perpendicular to the two, a jaw body driving device is arranged on the fixed jaw body, the jaw body driving device is connected to the movable jaw body, the fixed jaw body is fixed to a fixed object when in use, the movable jaw body can be driven by the jaw body driving device to move close to or away from the fixed jaw body, a first clamping jaw and a second clamping jaw are rotatably arranged on the fixed jaw body, the second clamping jaw can move close to or away from the first clamping jaw, and a second clamping jaw fixing piece is arranged on the second clamping jaw, a third clamping jaw and a fourth clamping jaw are rotatably arranged on the movable jaw body, the fourth clamping jaw can move close to or away from the third clamping jaw, and a fourth clamping jaw fixing piece is arranged on the fourth clamping jaw, and the first clamping jaw, the second clamping jaw, the third clamping jaw and the fourth clamping jaw rotate and move relatively to clamp the workpiece to be clamped.

[0003] When using the clamp disclosed in the above patent application, two jaws must be adjusted and fixed first, then the workpiece is placed, and the other two jaws are adjusted separately to clamp the workpiece. That is, the four jaws are adjusted and fixed separately, so the steps of clamping and fixing the workpiece are relatively complicated and inconvenient as a whole. Summary of the invention

[0004] The purpose of the present invention is to provide an adaptive pneumatic clamp to solve the technical defects of the prior art that the steps of clamping a workpiece are complicated and the clamping and fixing of the workpiece is inconvenient.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is: an adaptive pneumatic clamp, including a fixed base plate, a clamp block A, a push rod A, a clamp block B, a push rod B, a sliding block A, a rack A, a sliding block B, a rack B, a driving device and a gear, the clamp block A and the clamp block B are respectively arranged on the left and right sides of the fixed base plate and can slide back and forth on the fixed base plate, the push rod A and the push rod B are respectively arranged on the left and right sides of the fixed base plate and are threaded with the fixed base plate, one end of the push rod A and the push rod B are respectively rotatably connected with the clamp block A and the clamp block B, the rotation of the push rod A and the push rod B is used to drive the clamp block A and the clamp block B to move back and forth on the fixed base plate, the sliding block A and the sliding block B are respectively arranged on the left and right sides of the fixed base plate and can move back and forth on the fixed base plate, the rack A is fixed on the sliding block A, and the rack B is fixed on the sliding block B On, rack A and rack B are arranged opposite to each other, the driving device is fixed on the fixed base plate, the gear is located between rack A and rack B, and rack A and rack B are meshed with the gear, the driving device is connected to the gear, and is used to drive the gear to move forward and backward, and the forward and backward movement of the gear is used to push the sliding block A and the sliding block B to move forward and backward. When the clamped workpiece is released, the sliding block A or the sliding block B moves toward the driving device until it abuts against the driving device, and the gear rotates and pulls the sliding block B or the sliding block A continues to move toward the driving device until it abuts against the driving device and stops. When clamping the workpiece, the workpiece is placed on the fixed base plate and abuts against the clamping block A and the clamping block B. When the sliding block A or the sliding block B moves away from the driving device until it abuts against the workpiece, the gear rotates and pulls the sliding block B or the sliding block A continues to move toward the workpiece until it abuts against the workpiece.

[0006] When clamping a workpiece, the present invention only needs to manually adjust and fix the clamping block A and the clamping block B to complete the adjustment and fixation of one side of the workpiece, while the movement and adjustment of the sliding block A and the sliding block B on the other side of the workpiece are driven by the driving device and do not require manual adjustment, thereby reducing the steps of clamping and fixing the workpiece of the present invention and making the clamping of the workpiece more convenient.

[0007] As a further improvement of the present invention, a connecting plate A perpendicular to the tooth groove of the rack A is provided on the top of the rack A, and the connecting plate A is fixedly connected to the sliding block A. A connecting plate B perpendicular to the tooth groove of the rack B is provided on the top of the rack B, and the connecting plate B is fixedly connected to the sliding block B. The present invention provides the connecting plate A and the connecting plate B to facilitate the fixed connection between the rack A and the sliding block A and the fixed connection between the rack B and the sliding block B.

[0008] As a further improvement of the present invention, it also includes a clamp block C and a clamp block D, the length of the rack A is the same as the length of the sliding block A, and the end faces at both ends of the rack A are coplanar with the end faces at both ends of the sliding block A, the length of the rack B is the same as the length of the sliding block B, and the end faces at both ends of the rack B are coplanar with the end faces at both ends of the sliding block B, the clamp block C and the clamp block D are both L-shaped, the horizontal part of the clamp block C is fixedly connected to the connecting plate A and the end of the sliding block A close to the clamp block A, and the horizontal part of the clamp block D is fixedly connected to the connecting plate B and the end of the sliding block B close to the clamp block B. The present invention is provided with the clamp block C and the clamp block D, which is more conducive to the clamping of the workpiece close to the side of the driving device.

[0009] As a further improvement of the present invention, the left and right sides of the upper surface of the fixed bottom plate are respectively fixed with slide rails A and B along the front-back direction, the bottoms of the clamping blocks A and B are respectively fixed with sliders A and B, and the sliders A and B are respectively slidably matched with the slide rails A and B, and the bottoms of the sliding blocks A and B are respectively fixed with sliders C and D, and the sliders C and D are respectively slidably matched with the slide rails A and B. The present invention facilitates the sliding installation of the clamping blocks A, B, the sliding blocks A and B and the fixed bottom plate through the cooperation of the slide rails and the sliders.

[0010] As a further improvement of the present invention, the left and right sides of one end of the fixed bottom plate for mounting the top rod A and the top rod B are respectively protruded upward to form a connecting seat A and a connecting seat B, and the top rod A and the top rod B respectively pass through the connecting seat A and the connecting seat B, and are respectively threadedly matched with the connecting seat A and the connecting seat B. The present invention provides the connecting seat A and the connecting seat B, which facilitates the threaded matching of the top rod A and the top rod B with the fixed bottom plate, and increases the height of the top rod A and the top rod B, making it more convenient for them to rotate.

[0011] As a further improvement of the present invention, a handle A is provided on one end of the push rod A away from the clamping block A, and a handle B is provided on one end of the push rod B away from the clamping block B. The handle A and the handle B are respectively used to rotate the push rod A and the push rod B. The present invention provides the handle A and the handle B to facilitate the rotation of the push rod A and the push rod B in use.

[0012] As a further improvement of the present invention, the driving device is a cylinder, the cylinder body of the cylinder is mounted on a fixed bottom plate, a connecting piece is provided on the piston rod of the cylinder, a gear is rotatably mounted on the connecting piece, and the sliding block A or the sliding block B can be abutted against the cylinder body of the cylinder when moving toward the cylinder. The present invention uses a cylinder as a driving device, and the piston rod of the driving cylinder is telescopically driven to drive the sliding block A and the sliding block B to move, which is not only convenient for installation, but also convenient for the control of the above movement.

[0013] As a further improvement of the present invention, the connecting piece includes a fixing plate A, a fixing plate B and a fixing plate C, the fixing plate B and the fixing plate C are distributed up and down and arranged in parallel, one end of the fixing plate B and the fixing plate C is fixedly connected to the fixing plate A, the fixing plate A is used to be fixedly connected to the piston rod of the cylinder, the gear is arranged between the fixing plate B and the fixing plate C, and the top and bottom ends of the rotating shaft of the gear are respectively connected to the fixing plate B and the fixing plate C. The connecting piece of the present invention has a simple structure and is convenient for the installation of the gear.

[0014] As a further improvement of the present invention, a mounting plate perpendicular to the piston rod end of the cylinder is fixed, and the fixing plate A is detachably connected to the mounting plate. The present invention provides a mounting plate to facilitate the connection between the piston rod of the cylinder and the connecting piece.

[0015] As a further improvement of the present invention, at least one weight-reducing hole is provided on the fixed bottom plate and passes through the upper and lower sides thereof. The present invention reduces the overall weight and the cost of the material of the present invention.

[0016] In summary, the beneficial effects of the present invention are: the present invention only requires manual adjustment on one side of the workpiece, and the other end can be adjusted automatically, which facilitates the clamping and fixing of the workpiece, and the present invention has a simple structure and good economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the present invention.

[0018] Figure 2 It is a top view of the present invention.

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the present invention.

[0020] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle.

[0021] Figure 5 It is a three-dimensional structural schematic diagram of the clamping workpiece state of the present invention.

[0022] Figure 6 It is a three-dimensional structural schematic diagram of another angle of the clamping workpiece state of the present invention.

[0023] Figure 7 yes Figure 6 A partial enlarged view of point B in the middle.

[0024] Among them: 1. Fixed bottom plate; 2. Clamping block A; 3. Push rod A; 4. Clamping block B; 5. Push rod B; 6. Sliding block A; 7. Rack A; 8. Sliding block B; 9. Rack B; 10. Driving device; 11. Gear; 12. Workpiece; 13. Connecting plate A; 14. Connecting plate B; 15. Clamping block C; 16. Clamping block D; 17. Slide rail A; 18. Slide rail B; 19. Slider A; 20. Slider B; 21. Slider C; 22. Slider D; 23. Connecting seat A; 24. Connecting seat B; 25. Handle A; 26. Handle B; 27. Connecting piece; 28. Fixed plate A; 29. ​​Fixed plate B; 30. Fixed plate C; 31. Mounting plate; 32. Weight reduction hole. DETAILED DESCRIPTION

[0025] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings.

[0026] like Figures 1 to 7 The adaptive pneumatic clamp shown includes a fixed base plate 1, a clamping block A2, a push rod A3, a clamping block B4, a push rod B5, a sliding block A6, a rack A7, a sliding block B8, a rack B9, a driving device 10 and a gear 11. The fixed base plate 1 is a rectangular plate. In the present invention, the length direction of the fixed base plate 1 is the front-to-back direction, and the width direction is the left-to-right direction.

[0027] like Figures 1 to 3 As shown, the clamping block A2 and the clamping block B4 in the present invention are respectively arranged on the left and right sides of the upper surface of the fixed base plate 1, and can slide back and forth on the fixed base plate 1. When in use, the clamping block A2 and the clamping block B4 press against the workpiece 12 from one side of the workpiece 12 to be clamped, thereby fixing the workpiece 12 from one side. The clamping block A2 and the clamping block B4 slide independently relative to the fixed base plate 1. Therefore, the present invention can move the clamping block A2 and the clamping block B4 respectively according to the different shapes of the workpiece 12 to be clamped, so as to adapt to workpieces 12 of different shapes. The push rod A3 and the push rod B5 in the present invention are respectively arranged on the left and right sides above the fixed base plate 1 and are threadedly matched with the fixed base plate 1. The push rod A3 and the push rod B5 are both parallel to the fixed base plate 1. One end of the push rod A3 and the push rod B5 are respectively rotatably connected with the clamp block A2 and the clamp block B4. The rotation of the push rod A3 and the push rod B5 is respectively used to drive the clamp block A2 and the clamp block B4 to move back and forth on the fixed base plate 1. The push rod A3 and the push rod B5 respectively resist the clamp block A2 and the clamp block B4, thereby keeping the clamp block A2 and the clamp block B4 fixed when in use.

[0028] like Figures 1 to 7As shown, the sliding block A6 and the sliding block B8 in the present invention are respectively arranged on the left and right sides of the top surface of the fixed base plate 1, and can move forward and backward on the fixed base plate 1, the rack A7 is fixed on the sliding block A6, the rack B9 is fixed on the sliding block B8, and the rack A7 and the rack B9 are arranged opposite to each other, that is, the rack A7 and the rack B9 are respectively arranged on the surfaces of the sliding block A6 and the sliding block B8 on the opposite side, wherein the sliding block A6 is arranged corresponding to the clamping block A2, and the sliding block B8 is arranged corresponding to the clamping block B4.

[0029] like Figures 1 to 7 As shown, the driving device 10 in the present invention is fixed on the fixed base plate 1, and the driving device 10 is located in the middle part of the fixed base plate 1 away from the end of the top rod A3. The gear 11 is located between the rack A7 and the rack B9, and the rack A7 and the rack B9 are both meshed with the gear 11. The rack A7 and the rack B9 in the present invention are respectively meshed with the gear 11 from the left and right sides of the gear 11. The driving device 10 is connected to the gear 11 to drive the gear 11 to move forward and backward. The forward and backward movement of the gear 11 is used to push the sliding block A6 and the sliding block B8 to move forward and backward.

[0030] According to the present invention, when the clamped workpiece 12 is released, the sliding block A6 or the sliding block B8 moves toward the driving device 10 until it abuts against the driving device 10, and the gear 11 rotates and pulls the sliding block B8 or the sliding block A6 to continue moving toward the driving device 10 until it abuts against the driving device 10 and stops. When the workpiece 12 is clamped, the workpiece 12 is placed on the fixed base plate 1 and abuts against the clamping block A2 and the clamping block B4, and the sliding block A6 or the sliding block B8 moves away from the driving device 10 until it abuts against the workpiece 12, and the gear 11 rotates and pulls the sliding block B8 or the sliding block A6 to continue moving toward the workpiece 12 until it abuts against the workpiece 12.

[0031] like Figures 1 to 7 As shown, the present invention is provided with a connecting plate A13 on the top of the rack A7, the connecting plate A13 is perpendicular to the tooth groove of the rack A7, the length of the connecting plate A13 is the same as the length of the rack A7, and the connecting plate A13 is fixedly connected to the sliding block A6. The connecting plate A13 in the present invention is integrally formed with the rack A7, and a connecting plate B14 is provided on the top of the rack B9, the connecting plate B14 is perpendicular to the tooth groove of the rack B9, the length of the connecting plate B14 is equal to the length of the rack B9, and the connecting plate B14 is fixedly connected to the sliding block B8. The connection is fixed, the connecting plate B14 in the present invention is integrally formed with the rack B9, the length of the rack A7 in the present invention is the same as the length of the rack B9, the present invention is respectively provided with a mounting groove A and a mounting groove B on the top side facing each other of the sliding block A6 and the sliding block B8, the connecting plate A13 and the connecting plate B14 are respectively arranged in the mounting groove A and the mounting groove B, the connecting plate A13 and the sliding block A6 are detachably installed by at least two bolts, and the connecting plate B14 and the sliding block B8 are detachably installed by at least two bolts.

[0032] like Figures 1 to 7 As shown, the present invention is provided with a clamping block C15 and a clamping block D16, the length of the rack A7 is the same as the length of the sliding block A6, and the end faces at both ends of the rack A7 are coplanar with the end faces at both ends of the sliding block A6, the length of the rack B9 is the same as the length of the sliding block B8, and the end faces at both ends of the rack B9 are coplanar with the end faces at both ends of the sliding block B8, the clamping block C15 and the clamping block D16 are both L-shaped, the horizontal part of the clamping block C15 is detachably connected to the connecting plate A13 and the end of the sliding block A6 close to the clamping block A2 by bolts, the horizontal part of the clamping block D16 is detachably connected to the connecting plate B14 and the end of the sliding block B8 close to the clamping block B4 by bolts, the vertical parts of the clamping block C15 and the clamping block D16 are both set downward, and the clamping block C15 and the clamping block D16 support the workpiece 12 when in use.

[0033] like Figures 1 to 7 As shown, the present invention adopts multiple bolts to detachably install the slide rails A17 and B18 on the left and right sides of the upper surface of the fixed base plate 1 along the front-back direction, and adopts bolts to detachably install the sliders A19 and B20 on the bottom of the clamping block A2 and the clamping block B4, respectively. The sliders A19 and B20 are respectively slidably matched with the slide rails A17 and B18. The clamping block A2 moves forward and backward on the fixed base plate 1 through the sliding cooperation between the sliders A19 and the guide rails A17, and the sliders B20 and the slide rails are respectively slidably matched. The sliding fit of B18 enables the clamping block B4 to move back and forth on the fixed base plate 1. The slider C21 and the slider D22 are detachably installed on the bottom of the sliding block A6 and the sliding block B8 by bolts. The slider C21 and the slider D22 are slidingly matched with the slide rail A17 and the slide rail B18 respectively. Similarly, the present invention enables the sliding block A6 and the sliding block B8 to move back and forth on the fixed base plate 1 by the sliding fit of the slider C21 and the slide rail A17 and the sliding fit of the slider D22 and the slide rail B18.

[0034] like Figures 1 to 7As shown, on the fixed base plate 1 of the present invention, connection seats A23 and connection seats B24 are respectively formed to protrude upward on the left and right sides at one end for installing the top rod A3 and the top rod B5. The connection seats A23 and the connection seats B24 are integrally formed with the fixed base plate 1. Both the top rod A3 and the top rod B5 are screw rods. The top rod A3 and the top rod B5 respectively pass through the connection seats A23 and the connection seats B24, and are respectively in threaded cooperation with the connection seats A23 and the connection seats B24. Through the connection seats A23 and the connection seats B24, the heights of the top rod A3 and the top rod B5 can be increased, facilitating the installation of the top rod A3 and the top rod B5. At one end of the top rod A3 away from the clamping block A2, a handle A25 is provided, and at one end of the top rod B5 away from the clamping block B4, a handle B26 is provided. The handle A25 and the handle B26 are respectively used to rotate the top rod A3 and the top rod B5. The handle A25 and the handle B26 in the present invention are both in the shape of a butterfly plate, and are respectively welded and fixed to the top rod A3 and the top rod B5.

[0035] As Figures 1 to 7 shown, the driving device 10 in the present invention preferably adopts a cylinder. The cylinder block of the cylinder is detachably installed on the fixed base plate 1 by bolts. A connecting member 27 is provided on the piston rod of the cylinder. The gear 11 is rotatably installed on the connecting member 27. The extension and contraction of the piston rod of the cylinder are used to drive the gear 11 to move back and forth. When the sliding block A6 or the sliding block B8 moves towards the cylinder, they can respectively abut against the left and right sides of the cylinder block. As Figure 4 shown, the connecting member 27 in the present invention includes a fixing plate A28, a fixing plate B29, and a fixing plate C30. The widths of the fixing plate B29 and the fixing plate C30 are equal and smaller than the width of the fixing plate A28. The fixing plate B29 and the fixing plate C30 are distributed vertically and arranged in parallel. One end of the fixing plate B29 and the fixing plate C30 is fixedly connected to the fixing plate A28. The connecting member 27 is integrally in the shape of a "C", and its opening faces away from the cylinder. The fixing plate A28 is used to be fixedly connected to the piston rod of the cylinder. The gear 11 in the present invention is arranged between the fixing plate B29 and the fixing plate C30. The top end and the bottom end of the rotating shaft of the gear 11 are respectively connected to the fixing plate B29 and the fixing plate C30. The rotating shaft of the gear 11 in the present invention is a bolt, and a nut in threaded cooperation with it is provided at the bottom end of the bolt. In the present invention, a mounting plate 31 perpendicular to the piston rod end of the cylinder is fixedly provided. The mounting plate 31 has the same shape as the fixing plate A28, both being rectangular plates. The fixing plate A28 and the mounting plate 31 are detachably connected by at least two bolts.

[0036] As Figure 1 shown, in order to reduce the weight of the present invention, at least one weight-reducing hole 32 penetrating through its upper and lower sides is opened on the fixed base plate 1. The number of the weight-reducing holes 32 in the present invention is one, and it is rectangular in shape. The weight-reducing hole 32 is located between the slide rail A17 and the slide rail B18.

[0037] The following describes the method of using the present invention by taking the clamping and loosening of a "convex"-shaped workpiece 12 as an example.

[0038] The process of clamping the workpiece 12 of the present invention is as follows: first, the workpiece 12 is placed on the fixed base plate 1, and the left and right sides of the workpiece 12 are supported by the slide rails A17 and B18 respectively, and then the push rods A3 and B5 are rotated by the handles A25 and B26 to push the clamping blocks A2 and B4 to respectively press against the workpiece 12 from the left and right sides of the workpiece 12, and then the piston rod of the cylinder is controlled to extend to push the gear 11 to move toward the direction of the workpiece 12, and when the clamping blocks C15 and D16 do not press against the workpiece 12, the workpiece 12 is clamped. When the workpiece 12 is clamped, the clamp block C15 and the clamp block D16 move synchronously toward the workpiece 12 with the movement of the gear 11. When the clamp block D16 abuts against the workpiece 12, the clamp block C15 has not yet abutted against the workpiece 12. At this time, the sliding block B8 stops moving, the piston rod of the cylinder continues to extend, and the gear 11 starts to rotate. At the same time, the rack A7 continues to move toward the workpiece 12 with the rotation of the gear 11 until the clamp block C15 abuts against the workpiece 12, thereby clamping the workpiece 12. Figures 5 to 7 shown.

[0039] The process of loosening the workpiece 12 of the present invention is: the piston rod of the cylinder contracts, pulling the gear 11 to move in the direction away from the workpiece 12. At this time, since the sliding block A6 and the sliding block B8 are not in contact with the cylinder body of the cylinder, the gear 11 does not rotate at this time. The sliding block B8 moves toward the cylinder body of the cylinder with the movement of the gear 11. When the clamping block D16 moves to abut against the cylinder body of the cylinder, the clamping block D16 stops moving. When the gear 11 continues to move, it rotates relative to the rack B9. The gear 11 rotates, pulling the rack A7 and the sliding block A6 to continue to move toward the cylinder body of the cylinder until the sliding block A6 abuts against the cylinder body and stops. Since the clamping block C15 and the clamping block D16 are away from the workpiece 12, the workpiece 12 can be removed from the present invention.

[0040] The parts not specifically described in the above description are all prior art, or can be implemented by prior art. Moreover, the specific implementation cases described in the present invention are only preferred implementation cases of the present invention, and are not used to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patent scope of the present invention should be regarded as the technical scope of the present invention.

Claims

1. An adaptive pneumatic clamp, characterized in that: The invention comprises a fixed base plate (1), a clamping block A (2), a push rod A (3), a clamping block B (4), a push rod B (5), a sliding block A (6), a rack A (7), a sliding block B (8), a rack B (9), a driving device (10) and a gear (11), wherein the clamping block A (2) and the clamping block B (4) are respectively arranged on the left and right sides of the fixed base plate (1) and can slide forward and backward on the fixed base plate (1), the push rod A (3) and the push rod B (5) are respectively arranged on the left and right sides of the fixed base plate (1) and are threadedly engaged with the fixed base plate (1), and the push rod A (3) and the push rod B (5) are respectively arranged on the left and right sides of the fixed base plate (1) and are threadedly engaged with the fixed base plate (1), and the push rod A (3) and the push rod B ( One end of the rack (5) is rotatably connected to the clamp block A (2) and the clamp block B (4), respectively. The push rod A (3) and the push rod B (5) are respectively used to drive the clamp block A (2) and the clamp block B (4) to move forward and backward on the fixed base plate (1). The sliding block A (6) and the sliding block B (8) are respectively arranged on the left and right sides of the fixed base plate (1) and can move forward and backward on the fixed base plate (1). The rack A (7) is fixed on the sliding block A (6), the rack B (9) is fixed on the sliding block B (8), and the rack A (7) and the rack B (9) are arranged opposite to each other. The driving device (10) is fixed The gear (11) is fixed on a fixed base plate (1), the gear (11) is located between a rack A (7) and a rack B (9), and the rack A (7) and the rack B (9) are both meshed with the gear (11), the driving device (10) is connected to the gear (11) and is used to drive the gear (11) to move forward and backward, and the forward and backward movement of the gear (11) is used to push the sliding block A (6) and the sliding block B (8) to move forward and backward, and when the clamped workpiece (12) is released, the sliding block A (6) or the sliding block B (8) moves toward the driving device (10) until it abuts against the driving device (10), and the gear (11) is driven by the gear (11). The wheel (11) rotates and pulls the sliding block B (8) or the sliding block A (6) to continue to move toward the driving device (10) until it stops against the driving device (10). When clamping the workpiece (12), the workpiece (12) is placed on the fixed base plate (1) and abuts against the clamping block A (2) and the clamping block B (4). When the sliding block A (6) or the sliding block B (8) moves away from the driving device (10) until it abuts against the workpiece (12), the gear (11) rotates and pulls the sliding block B (8) or the sliding block A (6) to continue to move toward the workpiece (12) until it abuts against the workpiece (12).

2. The adaptive pneumatic clamp according to claim 1, characterized in that: A connecting plate A (13) perpendicular to the tooth groove of the rack A (7) is provided at the top of the rack A (7), and the connecting plate A (13) is fixedly connected to the sliding block A (6). A connecting plate B (14) perpendicular to the tooth groove of the rack B (9) is provided at the top of the rack B (9), and the connecting plate B (14) is fixedly connected to the sliding block B (8).

3. The adaptive pneumatic clamp according to claim 2, characterized in that: The invention also comprises a clamping block C (15) and a clamping block D (16), wherein the length of the rack A (7) is the same as the length of the sliding block A (6), and the end faces of both ends of the rack A (7) are coplanar with the end faces of both ends of the sliding block A (6), the length of the rack B (9) is the same as the length of the sliding block B (8), and the end faces of both ends of the rack B (9) are coplanar with the end faces of both ends of the sliding block B (8), the clamping block C (15) and the clamping block D (16) are both L-shaped, the horizontal portion of the clamping block C (15) is fixedly connected to the connecting plate A (13) and one end of the sliding block A (6) close to the clamping block A (2), and the horizontal portion of the clamping block D (16) is fixedly connected to the connecting plate B (14) and one end of the sliding block B (8) close to the clamping block B (4).

4. The adaptive pneumatic clamp according to claim 1, characterized in that: A slide rail A (17) and a slide rail B (18) are fixed to the left and right sides of the upper surface of the fixed base plate (1) along the front-rear direction, respectively; a slider A (19) and a slider B (20) are fixed to the bottom of the clamping block A (2) and the clamping block B (4), respectively; the slider A (19) and the slider B (20) are slidably matched with the slide rail A (17) and the slide rail B (18), respectively; a slider C (21) and a slider D (22) are fixed to the bottom of the sliding block A (6) and the sliding block B (8), respectively; the slider C (21) and the slider D (22) are slidably matched with the slide rail A (17) and the slide rail B (18), respectively.

5. The adaptive pneumatic clamp according to claim 1, characterized in that: The left and right sides of one end of the fixed base plate (1) for mounting the top rod A (3) and the top rod B (5) are respectively protruded upward to form a connecting seat A (23) and a connecting seat B (24). The top rod A (3) and the top rod B (5) pass through the connecting seat A (23) and the connecting seat B (24) respectively, and are respectively threadedly engaged with the connecting seat A (23) and the connecting seat B (24).

6. The adaptive pneumatic clamp according to claim 5, characterized in that: A handle A (25) is provided on one end of the push rod A (3) away from the clamping block A (2), and a handle B (26) is provided on one end of the push rod B (5) away from the clamping block B (4). The handle A (25) and the handle B (26) are used to rotate the push rod A (3) and the push rod B (5), respectively.

7. The adaptive pneumatic clamp according to claim 1, characterized in that: The driving device (10) is a cylinder, the cylinder body of which is mounted on a fixed base plate (1), a connecting piece (27) is provided on the piston rod of the cylinder, the gear (11) is rotatably mounted on the connecting piece (27), and the sliding block A (6) or the sliding block B (8) can abut against the cylinder body of the cylinder when moving toward the cylinder.

8. The adaptive pneumatic clamp according to claim 7, characterized in that: The connecting member (27) comprises a fixing plate A (28), a fixing plate B (29) and a fixing plate C (30), wherein the fixing plate B (29) and the fixing plate C (30) are arranged in parallel and arranged vertically, wherein one end of the fixing plate B (29) and the fixing plate C (30) is fixedly connected to the fixing plate A (28), and the fixing plate A (28) is used for being fixedly connected to the piston rod of the cylinder, and the gear (11) is arranged between the fixing plate B (29) and the fixing plate C (30), and the top end and the bottom end of the rotating shaft of the gear (11) are respectively connected to the fixing plate B (29) and the fixing plate C (30).

9. The adaptive pneumatic clamp according to claim 8, characterized in that: A mounting plate (31) perpendicular to the piston rod of the cylinder is fixed at the end of the piston rod, and the fixing plate A (28) is detachably connected to the mounting plate (31).

10. The adaptive pneumatic clamp according to claim 1, characterized in that: The fixed bottom plate (1) is provided with at least one weight-reducing hole (32) penetrating the upper and lower sides thereof.

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