Clamping device

Abstract

This invention relates to a clamping device, comprising a fixed base, a screw shaft, a first clamping body, a second clamping body, and an adjusting mechanism. The screw shaft is threadedly engaged with the fixed base and is movable relative to the fixed base. The first clamping body is fixedly connected to the fixed base, and the second clamping body is connected to the screw shaft and is movable relative to the first clamping body under the drive of the screw shaft. The adjusting mechanism includes a lever assembly, a ratchet assembly, and a reversing adjustment component. The lever assembly is connected to the screw shaft via the ratchet assembly and is capable of driving the screw shaft to rotate. The reversing adjustment component is connected to the ratchet assembly and can adjust the ratchet assembly such that when the lever assembly rotates forward, it drives the screw shaft to rotate and moves the second clamping body relatively closer to the first clamping body, and when it rotates in the reverse direction, it idles; or, when the lever assembly rotates in the reverse direction, it drives the screw shaft to rotate and moves the second clamping body relatively away from the first clamping body, and when it rotates in the forward direction, it idles. The clamping device provided by this invention is suitable for working conditions with limited space or large workpieces.

Description

Technical Field

[0001] This invention relates to the field of hand tools, and in particular to a clamping device. Background Technology

[0002] Clamping devices such as bench vises are common clamping tools used when working on a workbench. Traditional clamping devices adjust the clamping opening size by rotating a lever, and usually require several rotations of the lever to achieve a wide adjustment range. During the rotation of the lever, situations may arise where the workpiece is too large, causing interference between the lever and the workpiece / workbench, or where space is limited, causing interference between the lever and environmental components. In these cases, the lever needs to be rotated a certain angle, slid to the other end, and then rotated again, greatly extending the working time, and in some situations, it may even be impossible to complete the workpiece clamping operation. Summary of the Invention

[0003] In view of this, it is necessary to provide a clamping device.

[0004] This invention provides a clamping device, including a fixed base, a screw shaft, a first clamping body, a second clamping body, and an adjusting mechanism. The screw shaft is threadedly engaged with the fixed base and is movable relative to the fixed base. The first clamping body is fixedly connected to the fixed base, and the second clamping body is connected to the screw shaft and is movable relative to the first clamping body under the drive of the screw shaft. The adjusting mechanism includes a lever assembly, a ratchet assembly, and a reversing adjustment component. The lever assembly is connected to the screw shaft through the ratchet assembly and is capable of driving the screw shaft to rotate.

[0005] The reversing adjustment member is connected to the ratchet assembly. The reversing adjustment member can adjust the ratchet assembly so that when the lever assembly rotates in the forward direction, it drives the screw shaft to rotate and causes the second clamping body to move relatively closer to the first clamping body, and when it rotates in the reverse direction, it idles; or, when the lever assembly rotates in the reverse direction, it drives the screw shaft to rotate and causes the second clamping body to move relatively away from the first clamping body, and when it rotates in the forward direction, it idles.

[0006] In one embodiment of the present invention, the ratchet assembly includes a gear ring seat, a first pawl, a second pawl, and an elastic support member. The gear ring seat is connected to the screw shaft and can drive the screw shaft to rotate. The gear ring seat has teeth. The first pawl and the second pawl are housed in the gear ring seat and mesh with the teeth. The elastic support member is used to elastically hold the first pawl and the second pawl against the teeth.

[0007] The reversing adjustment member is provided with a pawl actuator, which is used to actuate the first pawl or the second pawl, so that the first pawl or the second pawl moves away from the tooth.

[0008] In one embodiment of the present invention, the lever assembly includes a lever and a rotating member. The rotating member includes a rotating part and a driving part connected to each other. The rotating part has a through hole for the lever to pass through. The driving part is housed in the gear ring seat. The first pawl and the second pawl are rotatably connected to the driving part, and the first pawl or the second pawl can drive the gear ring seat to rotate under the drive of the driving part.

[0009] In one embodiment of the present invention, the elastic support is a torsion spring, the gear ring seat has a bottom wall at one end relative to the screw shaft, the bottom wall has a torsion spring shaft protruding on the side facing the rotating part, the torsion spring is sleeved on the torsion spring shaft and the two ends of the torsion spring respectively abut against the first pawl and the second pawl.

[0010] In one embodiment of the present invention, the driving part is located on one side of the gear seat, and a receiving cavity is formed between the driving part and the gear seat, wherein the first pawl and the second pawl are received in the receiving cavity.

[0011] In one embodiment of the present invention, the elastic support is two springs, the driving part is located in the middle of the gear ring seat, and two receiving cavities are formed between the two sides of the driving part and the gear ring seat, the first pawl and the second pawl are respectively received in the two receiving cavities, and the first pawl and the second pawl are respectively connected to the two sides of the driving part by two springs.

[0012] In one embodiment of the present invention, the reversing adjustment member is sleeved on the rotating member, the clamping device further includes a ball, a ball receiving groove is formed on the outer peripheral wall of the rotating member, and the reversing adjustment member is provided with at least two ball adjusting grooves, each of which corresponds to a different rotation mode of the ratchet assembly; the ball is housed in the ball receiving groove and can enter one of the ball adjusting grooves when the reversing adjustment member rotates.

[0013] In one embodiment of the present invention, the reversing adjustment member can adjust the ratchet assembly such that both the first pawl and the second pawl abut against the teeth, so that the actuating assembly can drive the screw shaft to rotate in both forward and reverse rotation.

[0014] In one embodiment of the present invention, the ratchet assembly is fixedly connected to the end of the screw shaft; or,

[0015] The ratchet assembly is detachably mounted to the end of the screw shaft.

[0016] In one embodiment of the present invention, the commutation adjusting member is annular and the outer peripheral wall of the commutation adjusting member is provided with anti-slip texture; or...

[0017] The outer wall of the reversing adjustment member is recessed inward at intervals to form a flower shape.

[0018] The clamping device provided by this invention can control the connection between the lever assembly and the screw shaft through a ratchet assembly and a reversing adjustment component. This allows the lever assembly to drive the screw shaft to rotate when rotating in one direction, and to idle when rotating in the other direction. As a result, when operating the lever assembly, the operator only needs to rotate the lever assembly within a small space to achieve a large range of relative movement between the first and second clamping bodies. This makes the clamping device more flexible in use and suitable for working conditions with limited space or large workpieces. It can also greatly save the time required to clamp the workpiece. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the clamping device in the first embodiment of the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of the clamping device shown from a second perspective;

[0021] Figure 3 for Figure 2 A schematic cross-sectional view of the clamping device along the AA direction.

[0022] Figure 4 for Figure 3 An enlarged schematic diagram of part I shown;

[0023] Figure 5 for Figure 2 A schematic cross-sectional view of the clamping device in the BB direction shown.

[0024] Figure 6 for Figure 1 A schematic diagram of the clamping device shown from a third perspective;

[0025] Figure 7 for Figure 6 A schematic cross-sectional view of the clamping device in the CC direction shown.

[0026] Figure 8 for Figure 1 An exploded view of part of the structure in the clamping device shown;

[0027] Figure 9 This is a partial structural diagram of the adjusting mechanism in the second embodiment of the present invention;

[0028] Figure 10 for Figure 9 An exploded view of the regulating mechanism shown.

[0029] Figure 11 for Figure 9 A schematic cross-sectional view of the adjustment mechanism in the DD direction shown.

[0030] Figure 12 for Figure 9 A schematic cross-sectional view of the adjustment mechanism in the EE direction shown.

[0031] Figure 13 for Figure 9 A schematic cross-sectional view of the adjustment mechanism in the FF direction shown.

[0032] Figure 14 for Figure 9 A schematic diagram of some structures in the adjustment mechanism shown;

[0033] Figure 15 This is a schematic diagram of the clamping device in the third embodiment of the present invention.

[0034] 100. Clamping device; 10. Fixing base; 101. Fixing hole; 11. Base; 111. Annular groove; 12. Rotating rod; 13. Threaded connection seat; 20. Screw shaft; 21. First pin; 22. Elastic connector; 23. Second pin; 24. Connecting hole; 30. First clamping body; 31. First clamping surface; 32. Mounting cavity; 40. Second clamping body; 41. Second clamping surface; 42. Screw shaft receiving cavity; 50. Adjusting mechanism; 51. Actuating assembly; 511. Actuating rod; 512. Rotating component; 5121. Ball bearing receiving groove; 513. Rotating part; 514. Driving part; 5141. Second fixing groove; 5142. Torsion spring receiving groove ; 5143, Protrusion; 5144, Inner ring body fixing groove; 52, Ratchet assembly; 521, Gear ring seat; 5211, Tooth; 5212, Accommodating cavity; 5213, Bottom wall; 5214, Torsion spring shaft; 5215, First fixing groove; 5216, Baffle; 5217, Shaft key; 522, First pawl; 5221, Rotating shaft; 523, Second pawl; 524, Elastic support; 525, Spring fixing groove; 53, Reversing adjustment component; 531, Pawl actuating component; 532, Ball; 533, Ball adjusting groove; 534, Supporting elastic component; 535, Outer ring body; 536, Inner ring body; 54, Connecting tongue; 541, Positioning protrusion. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] It should be noted that when a component is said to be "connected to" another component, it can be directly connected to the other component or it can be centered within another component. When a component is said to be "set to" another component, it can be directly set to the other component or it may also be centered within another component. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or it may also be centered within another component.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] Please see Figures 1 to 8 , Figure 1 This is a schematic diagram of the clamping device 100 in the first embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the clamping device 100 shown from a second perspective; Figure 3 for Figure 2 A cross-sectional view of the clamping device 100 along the AA direction shown. Figure 4 for Figure 3 An enlarged schematic diagram of part I shown; Figure 5 for Figure 2 A cross-sectional view of the clamping device 100 along the BB direction shown. Figure 6 for Figure 1 A schematic diagram of the clamping device 100 shown from a third perspective; Figure 7 for Figure 6 A cross-sectional view of the clamping device 100 in the CC direction shown. Figure 8 for Figure 1 An exploded view of a portion of the structure of the clamping device 100 shown.

[0039] This invention provides a clamping device 100 for clamping a workpiece. In this embodiment, the clamping device 100 is used in a bench vise. It is understood that in other embodiments, the clamping device 100 can also be applied to other applicable occasions requiring workpiece clamping.

[0040] The clamping device 100 includes a fixed base 10, a screw shaft 20, a first clamping body 30, a second clamping body 40, and an adjustment mechanism 50. The adjustment mechanism 50 includes a lever assembly 51. The screw shaft 20 is threadedly engaged with the fixed base 10 and can move relative to the fixed base 10. The first clamping body 30 is fixedly connected to the fixed base 10. The lever assembly 51 is connected to one end of the screw shaft 20 and can drive the screw shaft 20 to rotate. The second clamping body 40 is connected to the screw shaft 20 and can move relative to the first clamping body 30 under the drive of the screw shaft 20.

[0041] The fixed base 10 and the first clamp 30 are fixed elements, and their positions are fixed. When the user rotates the lever assembly 51, the lever assembly 51 drives the screw shaft 20 to rotate. The second clamp 40 can move relative to the first clamp 30 as the screw shaft 20 rotates, thereby changing the distance between the first clamp 30 and the second clamp 40 to clamp workpieces of different sizes.

[0042] Please refer to it again. Figure 1 , Figure 3 , Figure 4 and Figure 7 In this embodiment, the fixing seat 10 includes a base 11 and a threaded connecting seat 13. The base 11 has multiple fixing holes 101, through which threaded fasteners can pass to fix the base 11 in the environment. One end of the threaded connecting seat 13 is fixedly connected to the base 11, and the other end is cylindrical, with an internal thread on its inner wall that mates with the screw shaft 20. To reduce the processing cost of the parts and facilitate assembly, preferably, the threaded connecting seat 13 is detachably mounted on the base 11. It is understood that the outer peripheral wall of the threaded connecting seat 13 at the end with the internal thread can also be of other shapes, as long as the inner wall can mate with the screw shaft 20; the threaded connecting seat 13 can also be integrally formed with the base 11 or the first clamping body 30.

[0043] Since the position of the fixing hole 101 is fixed, but the working conditions are varied, in order to make the clamping device 100 more flexible, an annular groove 111 is provided on the base 11, and a fixing screw (not labeled) is provided on the first clamping body 30. The fixing screw can pass through the annular groove 111, and the first clamping body 30 is fixedly installed on the base 11 by fixing bolts (not shown). Due to the setting of the annular groove 111, the first clamping body 30 can rotate at different angles relative to the environment, increasing the flexibility of the clamping device 100 when fixed.

[0044] To make the connection between the first clamp 30 and the base 11 easier and to save effort for the user when connecting the fixing bolt and the fixing screw, the fixing base 10 also includes a rotating rod 12. The fixing screw has a first through hole (unnumbered) for the rotating rod 12 to pass through. The rotating rod 12 can increase the lever arm when the fixing screw rotates, and the user can save a lot of effort when connecting the fixing bolt and the fixing screw.

[0045] The screw shaft 20 is roughly cylindrical, and an external thread is provided on the outer peripheral wall of the screw shaft 20. The screw shaft 20 is threadedly connected to the threaded connection seat 13, and can reciprocate relative to the threaded connection seat 13 through the threaded engagement.

[0046] In order to enable the screw shaft 20 to drive the second clamping body 40 to move, the clamping device 100 also includes a first pin 21. The end of the screw shaft 20 that is relatively close to the adjusting mechanism 50 has a first pin hole (not labeled). The first pin 21 is fixedly installed in the first pin hole. When the screw shaft 20 drives the second clamping body 40 to move relatively away from the first clamping body 30, the first pin 21 can apply a pushing force to the second clamping body 40 and drive the second clamping body 40 to move in a direction relatively away from the first clamping body 30.

[0047] To better clamp the workpiece between the first clamping body 30 and the second clamping body 40, the clamping device 100 further includes an elastic connector 22. The elastic connector 22 is sleeved on the screw shaft 20, with one end abutting against the first pin 21 and the other end abutting against the second clamping body 40. This arrangement ensures that when the first clamping body 30 and the second clamping body 40 clamp the workpiece, the elastic connector 22 provides a certain elastic force, preventing the workpiece from falling out between the two clamping bodies.

[0048] To prevent the screw shaft 20 from coming out of the threaded connector 13, the clamping device 100 also includes a second pin 23. The end of the screw shaft 20 that is relatively far from the adjusting mechanism 50 is provided with a second pin hole (not labeled). The second pin 23 can be fixedly installed in the second pin hole, and the length of the second pin 23 is greater than the inner diameter of the threaded connector 13. When the screw shaft 20 moves to the point where the second pin 23 abuts against the threaded connector 13, the second pin 23 can play a limiting role to prevent the screw shaft 20 from coming out of the threaded connector 13.

[0049] The first clamping body 30 is detachably and fixedly connected to the base 11, and the first clamping body 30 is provided with a first clamping surface 31 facing the second clamping body 40. In order to increase the friction between the clamping body and the workpiece and prevent the workpiece from slipping, it is preferable that the first clamping surface 31 is provided with anti-slip texture (not shown).

[0050] To reduce the size of the clamping device 100 while ensuring a large relative displacement between the first clamping body 30 and the second clamping body 40, the first clamping body 30 is provided with a mounting cavity 32 for the second clamping body 40 to pass through. This design makes efficient use of space and, while maintaining a small size of the clamping device 100, allows for a large relative displacement between the first clamping body 30 and the second clamping body 40, enabling the clamping of larger workpieces.

[0051] The second clamping body 40 can move closer to or further away from the first clamping body 30 under the drive of the screw shaft 20. The second clamping body 40 is provided with a second clamping surface 41 facing the first clamping body 30. The first clamping surface 31 can move closer to the second clamping surface 41 to clamp the workpiece, or move further away from the second clamping surface 41 to release the workpiece. To increase the friction between the workpiece and the clamping surface and prevent the workpiece from slipping, preferably, the second clamping surface 41 is also provided with anti-slip textures (not shown), and the anti-slip textures on the second clamping surface 41 are staggered with the anti-slip textures on the first clamping surface 31.

[0052] The second clamping body 40 has a screw shaft receiving cavity 42 for the screw shaft 20 to pass through, and a part of the structure of the second clamping body 40 passes through the mounting cavity 32 on the first clamping body 30, and the part of the structure of the second clamping body 40 can reciprocate within the mounting cavity 32. With this arrangement, the components of the clamping device 100 are compact and occupy a small area.

[0053] The adjustment mechanism 50 includes a lever assembly 51, which includes a lever 511 and a rotating member 512. The rotating member 512 has a through hole (not labeled) for the lever 511 to pass through. The lever 511 can slide back and forth in the through hole, which makes it easy for the user to quickly clamp the workpiece.

[0054] However, traditional clamping devices adjust the clamping opening size by rotating a lever, which typically requires several rotations to achieve a wide adjustment range. During the lever's rotation, situations arise where the workpiece is too large, causing interference between the lever and the workpiece / worktable; or where space is limited, causing interference between the lever and environmental components. In these cases, the lever needs to rotate a certain angle, slide to the other end, and then rotate again, significantly extending the working time, and in some situations, even failing to clamp the workpiece.

[0055] Based on this, please participate again. Figure 3 , Figure 4 , Figure 6 and Figure 7In the clamping device 100 provided by the present invention, the adjusting mechanism 50 further includes a ratchet assembly 52 and a reversing adjusting member 53. One end of the ratchet assembly 52 is connected to the screw shaft 20, and the other end is connected to the lever assembly 51. The lever assembly 51 can drive the screw shaft 20 to rotate through the ratchet assembly 52. ​​The reversing adjusting member 53 is connected to the ratchet assembly 52 and can adjust the ratchet assembly 52 so that when the lever assembly 51 rotates in the forward direction, it drives the screw shaft 20 to rotate and drives the second clamping body 40 to move relatively closer to the first clamping body 30, and when it rotates in the reverse direction, it is idle; or, when the lever assembly 51 rotates in the reverse direction, it drives the screw shaft 20 to rotate and drives the second clamping body 40 to move relatively away from the first clamping body 30, and when it rotates in the forward direction, it is idle.

[0056] The clamping device 100 in this invention is used as follows: When a workpiece needs to be clamped, the user adjusts the reversing adjustment component 53 to a mode where forward rotation is normal and reverse rotation is idle. Then, the user rotates the lever 511 forward, causing the second clamping body 40 to continuously move closer to the first clamping body 30. When the lever 511 rotates to an angle that causes positional interference with other components or makes it inconvenient for the user to apply force, the user rotates the lever 511 in the reverse direction. At this time, since the reverse rotation is idle, the lever 511 will not drive the screw shaft 20 to rotate, and the relative position between the first clamping body 30 and the second clamping body 40 remains unchanged. After rotating in the reverse direction to a suitable position, the user rotates the lever 511 forward again, causing the second clamping body 40 to continuously move closer to the first clamping body 30. This process is repeated until the first clamping surface 31 and the second clamping surface 41 approach each other and clamp the workpiece. Similarly, when it is necessary to release the workpiece, the user only needs to adjust the reversing adjustment component 53 to a mode where reverse rotation is normal and forward rotation is idle.

[0057] It should be noted that in this application, "forward rotation" and "reverse rotation" are only used to describe different directions of rotation. Forward rotation can be clockwise or counterclockwise, as long as the direction of reverse rotation is opposite to that of forward rotation.

[0058] The ratchet assembly 52 includes a gear ring seat 521, a first pawl 522, a second pawl 523, and an elastic support member 524. The gear ring seat 521 is connected to the screw shaft 20 and can drive the screw shaft 20 to rotate. The gear ring seat 521 has teeth 5211 inside. The first pawl 522 and the second pawl 523 are housed in the gear ring seat 521 and the first pawl 522 and the second pawl 523 are engaged with the teeth 5211. The elastic support member 524 is used to elastically hold the first pawl 522 and the second pawl 523 against the teeth 5211. The reversing adjustment member 53 is provided with a pawl actuating member 531, which is used to actuate the first pawl 522 or the second pawl 523 so that the first pawl 522 or the second pawl 523 is away from the teeth 5211.

[0059] The operating principle of the ratchet assembly 52 is as follows: the elastic support member 524 can elastically hold the first pawl 522 and the second pawl 523 against the teeth 5211 in the gear ring seat 521, and make the first pawl 522 and the second pawl 523 mesh with the teeth 5211; since the first pawl 522 and the second pawl 523 are elastically held, the pawl actuating member 531 on the reversing adjustment member 53 can actuate the first pawl 522 or the second pawl 523, so that at least one of the first pawl 522 and the second pawl 523 moves away from the teeth 5211. When the first pawl 522 engages with the tooth 5211 and the second pawl 523 disengages from the tooth 5211, the actuating assembly 51 can drive the screw shaft 20 to rotate in the forward direction, and rotates idling in the reverse direction; when the second pawl 523 engages with the tooth 5211 and the first pawl 522 disengages from the tooth 5211, the actuating assembly 51 can drive the screw shaft 20 to rotate in the reverse direction, and rotates idling in the forward direction.

[0060] Preferably, in one embodiment, to further increase the flexibility of the clamping device 100 during use, the reversing adjustment member 53 can adjust the ratchet assembly 52 so that both the first pawl 522 and the second pawl 523 abut against the teeth 5211, so that the lever assembly 51 can drive the screw shaft 20 to rotate in both forward and reverse rotation. Specifically, in this position, the reversing adjustment member 53 can drive the lever assembly 51 to rotate forward via the first pawl 522, thereby driving the screw shaft 20 to rotate, so that the second clamping body 40 can be relatively close to the first clamping body 30; and the reversing adjustment member 53 can drive the lever assembly 51 to rotate in reverse via the second pawl 523, thereby driving the screw shaft 20 to rotate, so that the second clamping body 40 can be relatively far away from the first clamping body 30. This configuration can increase the flexibility of the clamping device 100 in different usage scenarios, making it suitable not only for confined spaces but also for large spaces.

[0061] It is understood that in other embodiments, an idle gear can be added as needed. In this case, the reversing adjustment member 53 can adjust the ratchet assembly 52 so that the first pawl 522 and the second pawl 523 are both away from the tooth 5211, so that the lever assembly 51 is idle when rotating in the forward direction and in the reverse direction.

[0062] The rotating component 512 includes a rotating part 513 and a driving part 514 connected to each other. The rotating part 513 has a through hole for the lever 511 to pass through. The driving part 514 is housed in the gear ring seat 521. The first pawl 522 and the second pawl 523 are rotatably connected to the driving part 514, and the first pawl 522 or the second pawl 523 can drive the gear ring seat 521 to rotate under the drive of the driving part 514.

[0063] In this embodiment, the drive unit 514 is located on one side of the gear ring seat 521, and a receiving cavity 5212 is formed between the drive unit 514 and the gear ring seat 521. The first pawl 522 and the second pawl 523 are housed in the receiving cavity 5212. The elastic support member 524 is a torsion spring. The gear ring seat 521 has a bottom wall 5213 at the end closer to the screw shaft 20. The side of the bottom wall 5213 away from the receiving cavity 5212 is fixedly connected to the screw shaft 20. The side of the bottom wall 5213 facing the receiving cavity 5212 has a torsion spring shaft 5214 protruding into the receiving cavity 5212. The torsion spring is sleeved on the torsion spring shaft 5214, and the two ends of the torsion spring abut against the first pawl 522 and the second pawl 523 respectively, and abut against the teeth 5211 of the gear ring seat 521. It is understandable that the bottom wall 5213 and the gear ring seat 521 can be integrally formed or separately set, as long as the bottom wall 5213 can be fixedly connected to the end of the gear ring seat 521 that is relatively close to the screw shaft 20.

[0064] The inner wall of the reversing adjustment member 53 protrudes 5143 towards the axis and forms two pawl actuating members 531. The two pawl actuating members 531 are respectively connected to the first pawl 522 and the second pawl 523. When the reversing adjustment member 53 is rotated, the pawl actuating member 531 can move the first pawl 522 to engage with the tooth 5211, while the second pawl 523 moves away from the tooth 5211; or the second pawl 523 engages with the tooth 5211, while the first pawl 522 moves away from the tooth 5211; or the first pawl 522 and the second pawl 523 move away from the tooth 5211 at the same time.

[0065] In this embodiment, the reversing adjustment member 53 is generally annular and moves the first pawl 522 or the second pawl 523 by rotating relative to the rotating member 512. It is understood that in other embodiments, the reversing adjustment member 53 can also adjust the position of the pawl actuating member 531 by other means of movement, such as sliding up and down, sliding left and right, pressing, etc.

[0066] Preferably, the reversing adjustment member 53 has anti-slip texture on its outer peripheral wall, or the outer wall of the reversing adjustment member 53 is recessed inward at intervals to form a flower shape, so as to achieve the anti-slip function and facilitate the user to turn the reversing adjustment member 53. It is understood that the outer wall of the reversing adjustment member 53 can also be other shapes, as long as it is easy for the user to turn it.

[0067] To elaborate further, in this embodiment, the cross-section of the tooth 5211 actuating member is triangular, which achieves the effect of actuating the first pawl 522 or the second pawl 523 while avoiding positional interference with other components. It is understood that in other embodiments, the tooth 5211 actuating member can also have other shapes, as long as it can actuate the first pawl 522 or the second pawl 523 without interfering with positional interference with other components.

[0068] In this embodiment, two first fixing slots (unnumbered) are formed on the bottom wall 5213 of the gear ring seat 521, and two second fixing slots (unnumbered) are formed on the drive part 514 of the rotating member 512. One end of the first pawl 522 and the second pawl 523 are respectively accommodated in the first fixing slot, and the other end is respectively accommodated in the second fixing slot, thereby realizing the rotational connection between the first pawl 522 and the second pawl 523 and the drive part 514. It can be understood that in other embodiments, only the first fixing slot or only the second fixing slot may be provided, and the rotational connection between the first pawl 522 and the second pawl 523 and the drive part 514 may be achieved by common methods.

[0069] In this embodiment, the drive unit 514 is also provided with a torsion spring receiving groove 5142 for accommodating the torsion spring shaft 5214. The torsion spring and the torsion spring shaft 5214 can be accommodated in the torsion spring receiving groove 5142, and the two ends of the torsion spring can extend out of the torsion spring receiving groove 5142 and abut against the first pawl 522 and the second pawl 523 respectively.

[0070] In this embodiment, to more quickly lock the position of the reversing adjustment member 53, the reversing adjustment member 53 is fitted with a rotating member 512. The clamping device 100 also includes a ball bearing 532. A ball receiving groove 5121 is formed on the outer peripheral wall of the rotating member 512. The reversing adjustment member 53 is provided with at least two ball adjusting grooves 533, and different ball adjusting grooves 533 correspond to different rotation modes of the ratchet assembly 52. ​​The ball bearing 532 is housed in the ball receiving groove 5121 and can enter one of the ball adjusting grooves 533 when the reversing adjustment member 53 rotates. With this configuration, when the ball bearing 532 enters one of the ball receiving grooves 5121, the reversing adjustment member 53 makes the ratchet assembly 52 exactly in one of the rotation modes, such as normal forward rotation and free rotation in reverse; or normal reverse rotation and free rotation in forward rotation; or normal forward and reverse rotation; or free rotation in both forward and reverse rotation. The user can quickly lock the position of the reversing adjustment member 53, making the clamping device 100 easier to use.

[0071] To further enhance the positioning effect of the ball bearing 532, the clamping device 100 also includes a retaining elastic member 534, which is housed in the ball bearing receiving groove 5121 and can press the ball bearing 532 into the ball bearing adjusting groove 533. With this configuration, the ball bearing 532 is subjected to a certain elastic force, making it easier for the reversing adjusting member 53 to rotate; and when the ball bearing 532 enters the ball bearing adjusting groove 533, the ball bearing 532 will make a sound under the elastic force of the retaining elastic member 534, reminding the user that the reversing adjusting member 53 has entered a rotation mode.

[0072] Please refer to the following: Figures 9 to 14 , Figure 9 This is a partial structural schematic diagram of the adjusting mechanism 50 in the second embodiment of the present invention; Figure 10 for Figure 9 An exploded view of the regulating mechanism 50 shown; Figure 11 for Figure 9 A schematic cross-sectional view of the adjustment mechanism 50 in the DD direction shown; Figure 12 for Figure 9 A schematic cross-sectional view of the adjustment mechanism 50 in the EE direction shown. Figure 13 for Figure 9 A schematic cross-sectional view of the adjustment mechanism 50 in the FF direction shown; Figure 14 for Figure 9 A schematic diagram of part of the structure of the adjustment mechanism 50 shown.

[0073] The present invention also provides a second embodiment, which is substantially the same as the first embodiment, except that some parts of the adjustment structure are different.

[0074] In this embodiment, the elastic support member 524 consists of two springs. The drive part 514 is located in the middle of the gear ring seat 521, and two accommodating cavities 5212 are formed between the two sides of the drive part 514 and the gear ring seat 521, respectively. The first pawl 522 and the second pawl 523 are respectively accommodated in the two accommodating cavities 5212, and the first pawl 522 and the second pawl 523 are respectively connected to the two sides of the drive part 514 by two springs.

[0075] Two protrusions 5143 are respectively provided on both sides of the drive unit 514. Spring fixing grooves 525 are respectively formed on the first pawl 522 and the second pawl 523. One end of the spring is fitted with the protrusion 5143, and the other end is accommodated in the spring fixing groove 525, thereby achieving spring positioning. It can be understood that in other embodiments, both ends of the spring can be positioned by the protrusions 5143 or by the spring fixing grooves 525, as long as spring positioning can be achieved.

[0076] In this embodiment, a rotating shaft 5221 is provided in the middle of the first pawl 522 and the second pawl 523, so that the first pawl 522 and the second pawl 523 are rotatably connected to the drive unit 514.

[0077] In this embodiment, the reversing adjustment member 53 includes an outer ring body 535 and an inner ring body 536. The outer ring body 535 is sleeved on the inner ring body 536 and engages with the inner ring body 536. The outer ring body 535 can drive the inner ring body 536 to rotate. The outer peripheral wall of the driving part 514 is provided with an inner ring body fixing groove 5144. The inner ring body 536 is provided with a pawl actuating member 531 protruding towards the gear ring seat 521. The pawl actuating member 531 can actuate the first pawl 522 and the second pawl 523, so that the first pawl 522 or the second pawl 523 moves away from the tooth 5211.

[0078] In this embodiment, the gear ring seat 521 is a hollow cylindrical shape, and the clamping device 100 further includes a baffle 5216 and a key 5217. The baffle 5216 can extend into the gear ring seat 521 and is engaged and fixed by the key 5217. This design simplifies installation and saves installation time.

[0079] Please refer to the following: Figure 15 , Figure 15 This is a schematic diagram of the clamping device 100 in the third embodiment of the present invention.

[0080] The present invention also provides a third embodiment, which is substantially the same as the first embodiment, except that in this embodiment, the ratchet assembly 52 is detachably mounted to the end of the screw shaft 20.

[0081] Specifically, a connecting hole 24 is provided on one end of the screw shaft 20 and the end of the ratchet assembly 52, and a connecting tongue 54 that mates with the connecting hole 24 is provided on the other end; a positioning hole (not shown) is provided on the inner wall of the connecting hole 24, and a positioning protrusion 541 is provided on the connecting tongue 54. The connecting tongue 54 can be inserted into the connecting hole 24, and the positioning protrusion 541 is accommodated in the positioning hole, so that the ratchet assembly 52 can be detachably installed on the end of the screw shaft 20.

[0082] The clamping device 100 provided by the present invention can control the connection relationship between the lever assembly 51 and the screw shaft 20 through the ratchet assembly 52 and the reversing adjustment member 53, so that when the lever assembly 51 rotates in one direction, it drives the screw shaft 20 to rotate, and when it rotates in the other direction, it idles. This allows the operator to achieve a large range of relative movement between the first clamping body 30 and the second clamping body 40 by rotating the lever assembly 51 in a small space. This makes the clamping device 100 more flexible in use and suitable for working conditions with small space or large workpiece volume. It can also greatly save the time required to clamp the workpiece.

[0083] The technical features of the above-described embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any appropriate changes and variations made to the above embodiments within the essential spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A clamping device, characterized in that The utility model provides a kind of adjustable clamp, including fixed seat (10), screw shaft (20), first clamping body (30), second clamping body (40) and adjusting mechanism (50), the screw shaft (20) is threadedly matched with the fixed seat (10) and can be moved relative to the fixed seat (10), the first clamping body (30) is fixedly connected to the fixed seat (10), the first clamping body (30) is set with the installation cavity (32) for the second clamping body (40) to pass through, the second clamping body (40) is connected to the screw shaft (20) and can be moved relative to first clamping body (30) under the driving of the screw shaft (20);The adjusting mechanism (50) includes pulling assembly (51), ratchet assembly (52) and reversing adjusting piece (53), the pulling assembly (51) is connected to the screw shaft (20) by the ratchet assembly (52), and can drive the screw shaft (20) rotation; The ratchet assembly (52) includes gear ring seat (521), first pawl (522), second pawl (523) and elastic support (524), the gear ring seat (521) is connected to the screw shaft (20) and can drive the screw shaft (20) rotation;Gear ring seat (521) is equipped with tooth (5211) in, the first pawl (522) and the second pawl (523) are housed in the gear ring seat (521), and the first pawl (522) and the second pawl (523) are engaged on the tooth (5211), the elastic support (524) is used to elastically resist the first pawl (522) and the second pawl (523) on the tooth (5211); The reversing adjusting piece (53) is provided with pawl poking piece (531), the pawl poking piece (531) is used to poke the first pawl (522) or the second pawl (523), so that the first pawl (522) or the second pawl (523) is away from the tooth (5211), the reversing adjusting piece (53) is connected to the ratchet assembly (52), the reversing adjusting piece (53) can adjust the ratchet assembly (52), so that the pulling assembly (51) positive rotation drives the screw shaft (20) rotation, and drives the second clamping body (40) relatively close to the first clamping body (30), and reversely rotates empty;Or, so that the pulling assembly (51) reversely rotates and drives the screw shaft (20) rotation, and drives the second clamping body (40) relatively away from the first clamping body (30), and positive rotation is empty.

2. The clamping device of claim 1, wherein The pulling assembly (51) comprises a pulling rod (511) and a rotating member (512), the rotating member (512) comprises a rotating part (513) and a driving part (514) connected with each other, the rotating part (513) is provided with a through hole for the pulling rod (511) to pass through, the driving part (514) is accommodated in the gear ring seat (521), the first pawl (522) and the second pawl (523) are rotationally connected to the driving part (514), and the first pawl (522) or the second pawl (523) can drive the gear ring seat (521) to rotate under the driving of the driving part (514).

3. The clamping device of claim 2, wherein The elastic support (524) is a torsion spring, one end of the gear ring seat (521) close to the screw shaft (20) is provided with a bottom wall (5213), a torsion spring shaft (5214) is protruded from one side of the bottom wall (5213) towards the rotating part (513), the torsion spring is sleeved on the torsion spring shaft (5214), and two ends of the torsion spring are respectively abutted against the first pawl (522) and the second pawl (523).

4. The clamping device of claim 3, wherein The driving part (514) is located on one side of the gear ring seat (521), and the first pawl (522) and the second pawl (523) are accommodated in the accommodating cavities (5212).

5. The clamping device of claim 2, wherein The elastic support (524) is a torsion spring, one end of the gear ring seat (521) close to the screw shaft (20) is provided with a bottom wall (5213), a torsion spring shaft (5214) is protruded from one side of the bottom wall (5213) towards the rotating part (513), the torsion spring is sleeved on the torsion spring shaft (5214), and two ends of the torsion spring are respectively abutted against the first pawl (522) and the second pawl (523).

6. The clamping device of claim 2, wherein The reversing adjusting member (53) is sleeved on the rotating member (512), the clamping device (100) further comprises a ball (532), the outer peripheral wall of the rotating member (512) is provided with a ball accommodating groove (5121), the reversing adjusting member (53) is provided with at least two ball adjusting grooves (533), different ball adjusting grooves (533) correspond to different rotating modes of the ratchet wheel assembly (52), respectively, the ball (532) is accommodated in the ball accommodating groove (5121) and can enter one of the ball adjusting grooves (533) when the reversing adjusting member (53) rotates.

7. The clamping device of claim 1, wherein The reversing adjusting member (53) can adjust the ratchet wheel assembly (52), so that the first pawl (522) and the second pawl (523) are abutted against the teeth (5211), so that the pulling assembly (51) can drive the screw shaft (20) to rotate in the forward rotation and the reverse rotation.

8. The clamping device of claim 1, wherein The ratchet wheel assembly (52) is fixedly connected to the end of the screw shaft (20); or, The ratchet wheel assembly (52) is detachably installed on the end of the screw shaft (20).

9. The holding device according to claim 1, characterized in that The reversing adjusting piece (53) is circular ring-shaped, and an anti-skid pattern is arranged on the outer peripheral wall of the reversing adjusting piece (53); or The outer wall of the reversing adjusting piece (53) is recessed inward at intervals and forms a flower shape.

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