CN220051545U - Thumb clamp - Google Patents

Abstract

The utility model provides a thumb clamp which comprises a clamp body and a driving assembly, wherein the clamp body comprises a shell, a movable cavity and two clamping jaws, the movable cavity is formed in the shell, and the two clamping jaws are both arranged on the shell. The driving assembly comprises a piston rod and an elastic structure, the piston rod and the elastic structure are fixedly arranged in the movable cavity, and the piston rod is configured to drive the two clamping jaws to move oppositely or back to back under the action of the elastic structure. Compared with the related art, the thumb clamp provided by the utility model adopts an elastic structure, and can replace compressed gas to drive the piston rod to move. And can be under the condition that no external force acts on the piston rod, can make the piston rod be located the one end that two clamping jaws were kept away from all the time to the activity intracavity, consequently two clamping jaws have the trend of opposite movement all the time to make two clamping jaws can the centre gripping work piece all the time, compare with the correlation technique, can significantly reduce the energy consumption.

Description

Thumb clamp

Technical Field

The utility model belongs to the technical field of fixture tools, and particularly relates to a thumb fixture.

Background

The thumb clamp is an actuating device which uses compressed air as power and is used for driving two clamping jaws to move towards or away from each other to clamp a workpiece. In the practical application process, because the workpiece is required to be clamped all the time by using the thumb clamp due to the processing requirement, the workpiece is required to be continuously pressurized by using compressed air, and the energy consumption is increased. In the processing process, in order to improve the processing efficiency, a plurality of thumb clamps are often required to be used for respectively clamping a plurality of workpieces for simultaneous processing, and the operation conditions of the thumb clamps are different at different stations, so that the thumb clamps are required to be controlled according to the operation conditions, the operation is complex, and the use convenience is reduced.

Disclosure of Invention

The embodiment of the utility model aims to provide a thumb clamp, which solves the technical problem of complicated operation when a plurality of thumb clamps are used in the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme: there is provided a thumb grip comprising:

the clamp comprises a clamp body, a clamping head and a clamping head, wherein the clamp body comprises a shell, a movable cavity and two clamping jaws, the movable cavity is formed in the shell, and the two clamping jaws are both arranged on the shell;

the driving assembly comprises a piston rod and an elastic structure, the piston rod and the elastic structure are fixedly installed in the movable cavity, and the piston rod is configured to drive the two clamping jaws to move oppositely or back to back under the action of the elastic structure.

Optionally, the clamp body includes a limit sleeve, and the limit sleeve is fixedly installed at one end of the movable cavity, which is close to the clamping jaw; the piston rod comprises a rod body and a first boss, the rod body is arranged through the limit sleeve in a penetrating mode, and the first boss is formed on the outer peripheral side of the rod body; the elastic structure is abutted between the limit sleeve and the first boss.

Optionally, the piston rod further includes a second boss, where the second boss is formed on the outer peripheral side of the rod body and is located between the limiting sleeve and the first boss.

Optionally, the driving assembly further comprises two transmission structures, wherein the transmission structures are hinged between the clamping jaw and the piston rod and used for transmitting acting force of the piston rod to the two clamping jaws, and the two transmission structures and the two clamping jaws are arranged in a one-to-one correspondence mode.

Optionally, the transmission structure includes first transfer line and second transfer line, one end of first transfer line articulated in the piston rod, the other end articulated in the shell, the second transfer line connect in first transfer line is kept away from the one end of piston rod, the second transfer line keep away from first transfer line one end articulated in the clamping jaw.

Optionally, a first clamping groove is formed at one end of the first transmission rod, which is far away from the second transmission rod; the piston rod is close to one end of the first transmission rod and is provided with a hinge shaft, the hinge shaft is clamped in the first clamping groove and is configured to drive the two first transmission rods to rotate relative to the shell under the action of the piston rod.

Optionally, the clamping jaw is provided with a second clamping groove; the second transmission rod is far away from one end of the first transmission rod and is provided with a spherical hinge, and the spherical hinge is clamped in the second clamping groove and is configured to drive the clamping jaw to move under the action of the second transmission rod.

Optionally, an inclined plane is formed at one end of the limiting sleeve, which is close to the clamping jaw.

Optionally, the clamp body further includes a slide rail, and the slide rail is fixedly installed on the housing; the clamping jaw is provided with a sliding groove, and the sliding rail is clamped in the sliding groove.

Optionally, the clamp body further comprises a third boss, and the third boss is formed on the inner wall of the movable cavity far away from one end of the clamping jaw; the piston rod further comprises a fourth boss, the fourth boss is formed on the outer peripheral side, away from one end of the clamping jaw, of the piston rod, and the fourth boss and the third boss can form limiting.

The thumb clamp provided by the utility model has the beneficial effects that:

compared with the prior art, the thumb clamp provided by the embodiment of the utility model adopts the elastic structure, and can replace compressed gas to drive the piston rod to move. And can be under the condition that no external force acts on the piston rod, can make the piston rod be located the one end that two clamping jaws were kept away from all the time to the activity intracavity, consequently two clamping jaws have the trend of opposite movement all the time to make two clamping jaws can the centre gripping work piece all the time, compare with the correlation technique, can significantly reduce the energy consumption, help improving the convenience of using. In addition, when a plurality of thumb clamps are used simultaneously, the plurality of thumb clamps can be controlled simultaneously by only adopting one external power source, and the operation is simple.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of a thumb grip provided in an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a thumb grip provided in an embodiment of the present utility model;

fig. 3 is a partial enlarged view at a in fig. 2.

Wherein, each reference sign in the figure:

1. a clamp body; 11. a housing; 12. a movable cavity; 13. a clamping jaw; 14. a limit sleeve; 15. a second clamping groove; 16. an inclined plane; 17. a slide rail; 18. a chute; 19. a third boss;

2. a drive assembly; 21. a piston rod; 211. a rod body; 212. a first boss; 213. a second boss; 214. a hinge shaft; 22. an elastic structure; 23. a transmission structure; 231. a first transmission rod; 232. a second transmission rod; 233. a first clamping groove; 234. spherical hinge;

3. an exhaust nozzle.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Based on this, the present utility model provides a thumb clamp which adopts the elastic structure 22 to replace the compressed air as the power, can reduce the energy consumption, and can achieve the purpose of always clamping the workpiece in the initial state, and is simple to operate.

As shown in fig. 1 to 3, the embodiment of the utility model provides a thumb clamp, which comprises a clamp main body 1 and a driving component 2, wherein the clamp main body 1 comprises a shell 11, a movable cavity 12 and two clamping jaws 13, the movable cavity 12 is arranged on the shell 11, and the two clamping jaws 13 are both arranged on the shell 11. The driving assembly 2 comprises a piston rod 21 and an elastic structure 22, wherein the piston rod 21 and the elastic structure 22 are fixedly arranged in the movable cavity 12, and the piston rod 21 is configured to drive the two clamping jaws 13 to move towards or away from each other under the action of the elastic structure 22.

It should be noted here that, in the technical field of marking, when marking gold ingots, a plurality of holders (i.e. thumb clamps) are required to be arranged on a movable disc of a cam divider to respectively clamp a plurality of gold ingots, the movable disc rotates under the drive of the cam divider, the movable disc drives the plurality of thumb clamps to rotate, each thumb clamp sequentially passes through a plurality of processing stations under the action of the movable disc, and each thumb clamp always maintains a clamping state when passing through the plurality of processing stations so as to ensure the marking quality of the gold ingots. In summary, the thumb clamp only needs to open the two clamping jaws 13 at the feeding station, so that the gold ingot is conveniently placed between the two clamping jaws 13, and after the gold ingot is placed between the two clamping jaws 13, the clamping state is required to be maintained all the time until the marking of the gold ingot is finished. In the process, compressed air is required to be continuously pressurized so as to ensure that the thumb clamp is always in a clamping state, so that the energy consumption is higher, and the production cost is not reduced. In addition, in order to ensure the continuity of marking, a plurality of thumb clamps need to pass through the feeding station in sequence, so that one thumb clamp is always in an open state, the thumb clamps need to be controlled according to the station where the thumb clamps are located, and the operation is complex.

Specifically, when the thumb grip is in use, an external driver is used to drive the piston rod 21 in a first direction within the movable cavity 12 towards the jaws 13. The elastic structure 22 is gradually compressed by the piston rod 21 while storing elastic potential energy. The two clamping jaws 13 are moved back in the second direction by the piston rod 21. Here, the first direction above and below refers to the axial direction of the piston rod 21, specifically, the X-axis as shown in fig. 1. The second direction above and below refers to the bi-directional direction of the shortest line between the two jaws 13, in particular the Y-axis as shown in fig. 1. After the two clamping jaws 13 are spread back in the second direction, the workpiece can be placed between the two clamping jaws 13. The driving force of the external driver acting on the piston rod 21 is cancelled, at this time, the elastic structure 22 gradually rebounds and gradually stretches, and the piston rod 21 can also be driven to move back to the clamping jaw 13 along the first direction, and the two clamping jaws 13 move towards each other along the second direction under the action of the piston rod 21 so as to clamp a workpiece.

More specifically, in this embodiment, the external driver is fixedly mounted on the fixed disc of the cam divider, and the output end of the external driver is opposite to the feeding station, and when the cam divider drives the movable disc to drive the plurality of thumb clamps to rotate, the plurality of thumb clamps sequentially pass through the feeding station, so that the plurality of thumb clamps can be simultaneously controlled by adopting one external driver, the operation is simple, and the convenience of use is improved.

Compared with the prior art, the thumb clamp provided by the utility model adopts the elastic structure 22, and can replace compressed gas to drive the piston rod 21 to move. And can be under the condition that no external force acts on piston rod 21, can make piston rod 21 be located the one end that keeps away from two clamping jaw 13 all the time in movable chamber 12, consequently two clamping jaw 13 have the trend of opposite direction motion all the time to make two clamping jaw 13 can the centre gripping work piece all the time, compare with the correlation technique, can reduce the energy consumption greatly, help improving the convenience of use. When a plurality of thumb clamps are used simultaneously, the plurality of thumb clamps can be controlled simultaneously by only adopting one external power source, and the operation is simple. In addition, the piston rod 21 can drive the two clamping jaws 13 to simultaneously move back to back or opposite to each other, so that workpieces can be clamped in a centering manner, and the positioning effect is good.

Alternatively, the elastic structure 22 is provided as a spring or a leaf spring.

In one embodiment of the present utility model, referring to fig. 1 to 3, the clamp body 1 includes a limiting sleeve 14, and the limiting sleeve 14 is fixedly mounted on one end of the movable cavity 12 near the clamping jaw 13. The piston rod 21 includes a rod body 211 and a first boss 212, the rod body 211 is disposed through the limiting sleeve 14, and the first boss 212 is formed on the outer periphery of the rod body 211. Wherein the elastic structure 22 is abutted between the limit sleeve 14 and the first boss 212.

So set up, adopting spacing sleeve 14 and first boss 212, can make elastic structure 22 butt between spacing sleeve 14 and first boss 212. Since the limiting sleeve 14 is fixedly installed in the movable cavity 12, the limiting sleeve 14 and the housing 11 are kept fixed, so that the elastic structure 22 can drive the rod body 211 to move along the first direction through the first boss 212, and the rod body 211 can be always located at one end, far away from the clamping jaw 13, of the movable cavity 12. In summary, the limit sleeve 14 and the first boss 212 are adopted, so that the two clamping jaws 13 can always maintain the clamping state, and the energy consumption can be reduced. In addition, the rod 211 is inserted into the limiting sleeve 14, and the limiting sleeve 14 can limit the rod 211, so that the rod 211 can only move along the first direction, thereby improving the movement stability of the rod 211, preventing the movement of the rod 211 from deviating from the first direction, and further improving the clamping stability of the two clamping jaws 13.

In an embodiment of the present utility model, referring to fig. 1 to 3, the piston rod 21 further includes a second boss 213, and the second boss 213 is formed on the outer peripheral side of the rod body 211 and is located between the limiting sleeve 14 and the first boss 212.

So set up, adopt second boss 213, compare with the correlation technique, can be when body of rod 211 moves towards clamping jaw 13 along first direction, second boss 213 can realize spacing with spacing sleeve 14 to body of rod 211 is spacing, can body of rod 211 along first direction towards clamping jaw 13 removal distance overlength lead to body of rod 211 and other spare part to bump, helps improving the life of device.

Alternatively, a cross-sectional diameter of the second boss 213 perpendicular to the first direction is smaller than a cross-sectional diameter of the first boss 212 perpendicular to the first direction.

In one embodiment of the present utility model, referring to fig. 1 to 3, the driving assembly 2 further includes two transmission structures 23, each of the transmission structures 23 is hinged between the clamping jaw 13 and the piston rod 21, and is used for transmitting the acting force of the piston rod 21 to the two clamping jaws 13, and the two transmission structures 23 and the two clamping jaws 13 are arranged in a one-to-one correspondence. The transmission structure 23 comprises a first transmission rod 231 and a second transmission rod 232, wherein one end of the first transmission rod 231 is hinged to the piston rod 21, the other end of the first transmission rod 231 is hinged to the housing 11, the second transmission rod 232 is connected to one end, far away from the piston rod 21, of the first transmission rod 231, and one end, far away from the first transmission rod 231, of the second transmission rod 232 is hinged to the clamping jaw 13.

Specifically, when the lever body 211 moves toward the first transmission rod 231 in the first direction, since one end of the first transmission rod 231 near the second transmission rod 232 is hinged to the housing 11, the first transmission rod 231 is rotated about the third direction substantially toward the jaw 13 by the lever body 211. It should be noted here that the above and below third directions refer to bidirectional directions along the axis thereof, specifically, the Z axis as shown in fig. 1. Since the second transmission rod 232 is connected to the first transmission rod 231, the second transmission rod 232 follows the first transmission rod 231 to rotate around the third direction substantially away from the rod body 211, and at this time, the two second transmission rods 232 rotate away from each other. Since the clamping jaw 13 is hinged to one end of the second transmission rod 232 away from the first transmission rod 231, the two clamping jaws 13 are driven by the two second transmission rods 232 to move back along the second direction. When the rod body 211 moves away from the first transmission rod 231 along the second direction, the first transmission rod 231 rotates about the third direction and is substantially away from the clamping jaw 13 under the action of the rod body 211. The second transmission rods 232 rotate along the first transmission rods 231 around the third direction approximately towards the rod body 211, and at this time, the two second transmission rods 232 rotate oppositely. The two clamping jaws 13 are driven by the two second transmission rods 232 to move oppositely along the second direction.

So set up, adopting first transfer line 231 and second transfer line 232, body of rod 211 can drive two clamping jaw 13 back of the body of rod or move in opposite directions. The second transmission rod 232 is connected in first transmission rod 231 of bending, compares for the straight line pole with the second transmission rod 232 in the related art with first transmission rod 231 is connected, can make transmission structure 23 compacter, helps reducing the volume of thumb anchor clamps, and then can increase the application scene of thumb anchor clamps.

In an embodiment of the present utility model, referring to fig. 1 to 3, a first clamping groove 233 is formed at an end of the first transmission rod 231 away from the second transmission rod 232. The end of the piston rod 21 near the first transmission rod 231 is provided with a hinge shaft 214, and the hinge shaft 214 is clamped in the first clamping groove 233 and is configured to drive the two first transmission rods 231 to rotate relative to the housing 11 under the action of the piston rod 21.

So set up, adopt first draw-in groove 233, first transfer line 231 can realize articulated with body of rod 211. Compared with the through holes in the related art, the through holes are convenient to detach and mount, and the convenience of use is improved. In addition, the rod body 211 can simultaneously drive the two first driving rods 231 to simultaneously rotate by adopting the two first clamping grooves 233.

In an embodiment of the present utility model, referring to fig. 1 to 3, the clamping jaw 13 is provided with a second clamping groove 15. The end of the second transmission rod 232 far away from the first transmission rod 231 is provided with a spherical hinge 234, and the spherical hinge 234 is clamped in the second clamping groove 15 and is configured to drive the clamping jaw 13 to move under the action of the second transmission rod 232.

So set up, adopt the second draw-in groove 15, second transfer line 232 can realize articulated with body of rod 211. By adopting the spherical hinge 234, compared with the related art, when the second transmission rod 232 and the clamping jaw 13 relatively rotate, the second transmission rod 232 and the clamping jaw 13 can be prevented from being blocked as much as possible, so that the second transmission rod 232 drives the clamping jaw 13 to move.

In one embodiment of the present utility model, referring to fig. 1 to 3, the end of the limiting sleeve 14 near the clamping jaw 13 is provided with a bevel 16.

By adopting the inclined surface 16, the rotation space of the first transmission rod 231 can be increased, and interference of the limit sleeve 14 to the rotation of the first transmission rod 231 can be prevented when the first transmission rod 231 rotates.

In one embodiment of the present utility model, referring to fig. 1 to 3, the clamp body 1 further includes a sliding rail 17, and the sliding rail 17 is fixedly mounted on the housing 11. The clamping jaw 13 is provided with a sliding groove 18, and the sliding rail 17 is clamped in the sliding groove 18.

By adopting the sliding rail 17 and the sliding groove 18, the clamping jaw 13 can be limited on the sliding rail 17, so that the clamping jaw 13 can only move along the second direction, and the moving stability of the clamping jaw 13 can be improved.

In an embodiment of the present utility model, referring to fig. 1 to 3, the clamp body 1 further includes a third boss 19, and the third boss 19 is formed on an inner wall of the movable cavity 12 at an end far from the clamping jaw 13.

So set up, adopt third boss 19 and first boss 212, first boss 212 and third boss 19 can form spacingly, can prevent that elastic construction 22 from popping out body of rod 211 from movable chamber 12.

Optionally, the casing 11 is provided with an exhaust nozzle 3, and the exhaust nozzle 3 is communicated with the movable cavity 12.

So set up, adopt exhaust nozzle 3 for movable cavity 12 and external environment intercommunication can prevent that movable cavity 12 from leading to the atmospheric pressure increase in movable cavity 12 because of the volume reduction when body of rod 211 removes along first direction towards clamping jaw 13, thereby can prevent that the condition that body of rod 211 can't remove from appearing.

One or more embodiments of the present utility model are intended to embrace all such alternatives, modifications and variations as fall within the broad scope of the present utility model. Accordingly, any omissions, modifications, equivalents, improvements and others which are within the spirit and principles of the one or more embodiments of the utility model are intended to be included within the scope of the utility model.

Claims (10)

1. A thumb grip, comprising:

the clamp comprises a clamp body (1), wherein the clamp body (1) comprises a shell (11), a movable cavity (12) and two clamping jaws (13), the movable cavity (12) is formed in the shell (11), and the two clamping jaws (13) are both installed on the shell (11);

the driving assembly (2), the driving assembly (2) comprises a piston rod (21) and an elastic structure (22), the piston rod (21) and the elastic structure (22) are fixedly installed in the movable cavity (12), and the piston rod (21) is configured to drive the two clamping jaws (13) to move in opposite directions or back to back under the action of the elastic structure (22).

2. The thumb grip according to claim 1, characterized in that the grip body (1) comprises a limit sleeve (14), the limit sleeve (14) being fixedly mounted to the movable cavity (12) at one end near the gripping jaw (13); the piston rod (21) comprises a rod body (211) and a first boss (212), the rod body (211) is arranged on the limiting sleeve (14) in a penetrating mode, and the first boss (212) is formed on the outer periphery side of the rod body (211); wherein, the elastic structure (22) is abutted between the limit sleeve (14) and the first boss (212).

3. The thumb grip according to claim 2, wherein the piston rod (21) further comprises a second boss (213), the second boss (213) being formed on the outer peripheral side of the rod body (211) and being located between the limit sleeve (14) and the first boss (212).

4. Thumb grip according to claim 1, characterized in that the drive assembly (2) further comprises two transmission structures (23), which transmission structures (23) are each hinged between the clamping jaw (13) and the piston rod (21) and are used for transmitting the force of the piston rod (21) to the two clamping jaws (13), which transmission structures (23) and the two clamping jaws (13) are arranged in a one-to-one correspondence.

5. Thumb grip according to claim 4, characterised in that the transmission structure (23) comprises a first transmission rod (231) and a second transmission rod (232), one end of the first transmission rod (231) being hinged to the piston rod (21) and the other end being hinged to the housing (11), the second transmission rod (232) being connected to the end of the first transmission rod (231) remote from the piston rod (21), the end of the second transmission rod (232) remote from the first transmission rod (231) being hinged to the clamping jaw (13).

6. The thumb clamp according to claim 5, wherein a first clamping groove (233) is formed at one end of the first transmission rod (231) away from the second transmission rod (232); one end of the piston rod (21) close to the first transmission rod (231) is provided with a hinge shaft (214), and the hinge shaft (214) is clamped in the first clamping groove (233) and is configured to drive the two first transmission rods (231) to rotate relative to the shell (11) under the action of the piston rod (21).

7. Thumb grip according to claim 5, characterised in that the gripping jaw (13) is provided with a second clamping groove (15); one end of the second transmission rod (232) far away from the first transmission rod (231) is provided with a spherical hinge (234), and the spherical hinge (234) is clamped in the second clamping groove (15) and is configured to drive the clamping jaw (13) to move under the action of the second transmission rod (232).

8. Thumb clamp according to claim 2, characterised in that the end of the limit sleeve (14) adjacent to the clamping jaw (13) is provided with a bevel (16).

9. The thumb grip according to any of the claims 1-8, characterised in that the grip body (1) further comprises a slide (17), which slide (17) is fixedly mounted to the housing (11); the clamping jaw (13) is provided with a sliding groove (18), and the sliding rail (17) is clamped to the sliding groove (18).

10. The thumb grip according to any of the claims 1-8, characterised in that the grip body (1) further comprises a third boss (19), which third boss (19) is formed in the inner wall of the movable cavity (12) at the end remote from the jaw (13); the piston rod (21) further comprises a fourth boss (215), the fourth boss (215) is formed on the outer peripheral side of one end, far away from the clamping jaw (13), of the piston rod (21), and the fourth boss and the third boss (19) can form limit positions.