CN218946793U

CN218946793U - Clamping device

Info

Publication number: CN218946793U
Application number: CN202320056174.4U
Authority: CN
Inventors: 何明蕙; 文江东; 郭贵福; 丘锋仁
Original assignee: Jiangxi Luxshare Intelligent Manufacture Co Ltd
Current assignee: Jiangxi Luxshare Intelligent Manufacture Co Ltd
Priority date: 2023-01-09
Filing date: 2023-01-09
Publication date: 2023-05-02
Anticipated expiration: 2033-01-09

Abstract

The utility model relates to the technical field of mechanical clamping, and discloses a clamping device which comprises a base, a driving mechanism, a first-direction clamping assembly and a second-direction clamping assembly, wherein the driving mechanism is fixed on the base; the first direction clamping assembly comprises two first push plates, the driving mechanism can drive the two first push plates to be close to or far away from each other at the same time, the two first push plates are fixedly provided with a first clamping jaw and a push rod, and the extending directions of the two push rods are deviated from each other; the second direction clamping assembly comprises two second push plates, the second push plates are in sliding connection with the base, second clamping jaws are fixed on the two second push plates, inclined planes are arranged on the two second push plates, the push rods are in butt joint with the inclined planes, and elastic reset mechanisms are arranged between the two second push plates and the base. The clamping device realizes the linkage control of four groups of clamping jaws through the driving mechanism, can simultaneously position and clamp the periphery sides of a workpiece, has convenient operation, good synchronism, accurate positioning, small occupied space and cost saving.

Description

Clamping device

Technical Field

The utility model relates to the technical field of mechanical clamping, in particular to a clamping device.

Background

SMT is a surface assembly technique, and components are soldered and assembled on a printed circuit board by reflow soldering or dip soldering, so as to obtain a module capable of realizing a certain function. When the existing assembly equipment assembles the components, the components are required to be clamped and transferred onto the printed circuit board by the clamping device, so that the components are positioned and mounted.

In order to achieve good clamping of components, an existing clamping device generally adopts four cylinders to push clamping jaws in four directions so as to position and clamp the periphery of the components. However, such a clamping device has the following problems: firstly, the pushing of four cylinders is difficult to synchronize, and inaccurate positioning can be caused; secondly, because the air cylinders are provided with air paths and circuits, the layout is difficult due to the fact that four air cylinders are arranged in a narrow space; moreover, the use of four cylinders is costly, resulting in an expensive clamping device.

In addition, the following clamping schemes are also adopted in the prior art: the clamping jaw in at least one direction is fixed, and the clamping jaw in other directions is controlled to approach the fixed clamping jaw by utilizing the air cylinder in a linkage mode, so that the periphery of a workpiece is clamped. Although the number of the air cylinders is reduced to a certain extent, when the clamping device is used, at least one edge of a workpiece needs to be positioned, then other edges are positioned and clamped, the operation is inconvenient, the workpiece clamping process is not flexible enough, and the simultaneous positioning and clamping of the periphery sides of the workpiece cannot be realized.

Therefore, a clamping device is needed to solve the above technical problems.

Disclosure of Invention

Based on the above, the utility model aims to provide the clamping device which can synchronously position and clamp the periphery of a workpiece through one driving mechanism, and has the advantages of convenient operation, good synchronism, accurate positioning, small occupied space and cost saving.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the present utility model provides a clamping device comprising:

a base;

the driving mechanism is fixed on the base;

the first direction clamping assembly comprises two first push plates which are oppositely arranged along a first direction, and the driving mechanism can simultaneously drive the two first push plates to be close to or far away from each other along the first direction; the first clamping jaws are used for clamping two opposite edges of a workpiece along a first direction; push rods arranged along a second direction are fixed on the two first push plates, the extending directions of the two push rods deviate from each other, and the second direction is perpendicular to the first direction;

the second direction clamping assembly comprises two second pushing plates which are oppositely arranged along the second direction, the second pushing plates are in sliding connection with the base, second clamping jaws are fixed on the two second pushing plates, and the second clamping jaws are used for clamping the other two opposite edges of the workpiece along the second direction; the two pushing plates are respectively provided with an inclined surface at one end which is close to each other, the pushing rods are abutted against the inclined surfaces, and when the two first pushing plates are far away from each other, the two pushing rods can push the two second pushing plates to be far away from each other along the second direction; elastic reset mechanisms are arranged between the two second push plates and the base, and when the two first push plates are close to each other, the two elastic reset mechanisms can push the two second push plates to be close to each other along the second direction.

In some possible embodiments, the elastic return mechanism comprises:

the mounting block is fixed on the second push plate;

the limiting block is fixed on the base;

one end of the limiting column is fixedly connected with the mounting block, and the other end of the limiting column movably penetrates through the limiting block;

and the compression spring is arranged on the limit post and is positioned between the mounting block and the limit block.

In some possible embodiments, a sliding mechanism is disposed between the second push plate and the base, the sliding mechanism comprising:

the guide rail mounting plate is fixed on the base;

the guide rail is fixed on the guide rail mounting plate and extends along the second direction;

the sliding block is slidably arranged on the guide rail and is fixedly connected with the second push plate.

In some possible embodiments, a push rod fixing block is fixed on one side surface of the first push plate, which is close to the second push plate, and the push rod is fixed on the push rod fixing block.

In some possible embodiments, the end of the push rod is provided with a rounded chamfer.

In some possible embodiments, the second pushing plate is further provided with a smooth limiting groove at the bottom of the inclined plane, and when the two first pushing plates approach each other to the limit position, the pushing rod is matched with the limiting groove.

In some possible embodiments, a first mounting groove is formed in the bottom of the first push plate, and the first clamping jaw is fixed in the first mounting groove; and/or

The bottom of second push pedal is provided with the second mounting groove, the second clamping jaw is fixed in the second mounting groove.

In some possible embodiments, at least two first clamping jaws are fixed on each first push plate at intervals, and the first clamping jaws on the two first push plates are arranged in a one-to-one correspondence manner; and/or

At least two second clamping jaws are fixed on each second push plate at intervals, and the second clamping jaws on the two second push plates are arranged in one-to-one correspondence.

In some possible embodiments, the first clamping jaw comprises a first fixing part, a first connecting part and a first clamping part which are sequentially arranged, the first fixing part is used for being fixed with the first push plate, the first connecting part is used for connecting the first fixing part and the first clamping part, and the first clamping part is provided with a first groove matched with the edge thickness of the workpiece and used for clamping the edge of the workpiece; and/or

The second clamping jaw comprises a second fixing portion, a second connecting portion and a second clamping portion which are sequentially arranged, wherein the second fixing portion is used for being fixed with the second pushing plate, the second connecting portion is used for being connected with the second fixing portion and the second clamping portion, and the second clamping portion is provided with a second groove which is matched with the edge thickness of the workpiece and used for clamping the edge of the workpiece.

In some possible embodiments, the driving mechanism is a parallel sliding table finger cylinder, and includes a cylinder body, a linear sliding rail mounted on the cylinder body, and two air pawls capable of sliding along the linear sliding rail, where the two air pawls are respectively and fixedly connected with the two first pushing plates in a one-to-one correspondence manner.

The beneficial effects of the utility model are as follows:

when the driving mechanism provides opening power, the two first pushing plates are mutually far away along the first direction, and at the moment, the first clamping jaws on the two first pushing plates are mutually far away, namely in an opening state; meanwhile, the push rods on the two first push plates push the two second push plates to be away from each other along the second direction, and at the moment, the second clamping jaws on the two second push plates are also away from each other, namely in an open state; the clamping jaw of the whole clamping device is in an open state, so that the workpiece can be conveniently moved. When the driving mechanism provides shrinking power, the two first pushing plates are close to each other along the first direction, and the first clamping jaws on the two first pushing plates are also close to each other, namely in a clamping state, so that two opposite edges of a workpiece can be positioned and clamped along the first direction; meanwhile, the two groups of elastic reset mechanisms push the two second push plates to be close to each other along the second direction, and at the moment, the second clamping jaws on the two second push plates are also close to each other, namely in a clamping state, so that the other two opposite edges of the workpiece can be positioned and clamped along the second direction, and the simultaneous positioning and clamping of the periphery sides of the workpiece are realized.

According to the clamping device provided by the utility model, the linkage control of the four groups of clamping jaws is realized through the driving mechanism, so that the four groups of clamping jaws can simultaneously position and clamp the periphery of a workpiece, and the clamping device has good synchronism, accurate positioning and firm clamping; and one driving mechanism occupies small space and is convenient to arrange; and the number of the driving mechanisms is reduced, so that the cost is effectively saved. The four groups of clamping jaws of the clamping device synchronously clamp the workpiece, are more convenient to operate, are more flexible to clamp the workpiece, and can be suitable for various working occasions.

Drawings

Fig. 1 is a schematic structural diagram of a clamping device according to an embodiment of the present utility model when clamping a workpiece;

fig. 2 is a schematic structural diagram of a clamping device according to an embodiment of the present utility model;

FIG. 3 is a split structure diagram of a clamping device and a workpiece provided by an embodiment of the utility model;

figure 4 is a schematic view of the construction of a first push plate according to an embodiment of the present utility model;

figure 5 is a schematic view of a second pusher plate according to an embodiment of the present utility model;

figure 6 is a schematic diagram of a second push plate according to an embodiment of the present utility model;

figure 7 is a schematic view of a first jaw according to an embodiment of the utility model;

figure 8 is a schematic diagram of a second jaw according to an embodiment of the present utility model;

fig. 9 is a schematic structural view of a driving mechanism according to an embodiment of the present utility model.

In the figure:

100-workpiece;

1-a base;

2-a driving mechanism; 21-a cylinder; 22-linear slide rails; 23-air claw;

3-a first direction clamping assembly; 31-a first push plate; 311-a first mounting groove; 32-a first jaw; 321 a first fixing portion; 322-first connection portion; 323-a first clamping portion; 324-a first groove; 33-push rod; 34-a push rod fixing block;

4-a second direction clamping assembly; 41-a second push plate; 411-bevel; 412-a limit groove; 413-a second mounting groove; 42-a second jaw; 421-second fixation; 422-a second connection; 423-a second clamping portion; 424-a second groove; 43-mounting blocks; 44-limiting blocks; 45-limiting columns; 46-compressing a spring; 47-a rail mounting plate; 48-a guide rail; 49-slider.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", etc., are orientation or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The embodiment provides a clamping device, which can be used in an SMT assembly or other machining processes to realize synchronous positioning and clamping of the peripheral edges of a workpiece 100. Preferably, the workpiece 100 in this embodiment is a rectangular structure having two opposing edges extending in a first direction and two opposing edges extending in a second direction, wherein the first direction is perpendicular to the second direction.

As shown in fig. 1-9, the clamping device comprises a base 1, a driving mechanism 2, a first direction clamping assembly 3 and a second direction clamping assembly 4. The base 1 is the supporting structure of the entire clamping device and is also used for the connection of the clamping device to an external manipulator or other external structure. A drive mechanism 2 is fixed to the base 1 for providing a driving force for opening and clamping the entire clamping device. The first direction clamping assembly 3 comprises two first push plates 31 which are oppositely arranged along the first direction, and the driving mechanism 2 can drive the two first push plates 31 to be close to or far away from each other along the first direction. A set of first clamping jaws 32 is fixed to each first push plate 31, and two sets of first clamping jaws 32 are used to clamp two opposite edges of the workpiece 100 in a first direction. Push rods 33 arranged along the second direction are fixed on the two first push plates 31, and the extending directions of the two push rods 33 are opposite to each other. The second direction clamping assembly 4 comprises two second pushing plates 41 oppositely arranged along the second direction, the second pushing plates 41 are in sliding connection with the base 1, a group of second clamping jaws 42 are fixed on each second pushing plate 41, and the two groups of second clamping jaws 42 are used for clamping the other two opposite edges of the workpiece 100 along the second direction. The two second push plates 41 are provided with inclined surfaces 411 at the ends close to each other, the push rods 33 are abutted against the inclined surfaces 411, and when the driving mechanism 2 drives the two first push plates 31 to move away from each other, the two push rods 33 can push the two second push plates 41 to move away from each other along the second direction. Elastic reset mechanisms are arranged between the two second push plates 41 and the base 1, and when the driving mechanism 2 drives the two first push plates 31 to approach each other, the two groups of elastic reset mechanisms can push the two second push plates 41 to approach each other along the second direction.

According to the clamping device provided by the utility model, when the driving mechanism 2 provides opening power, the two first push plates 31 are far away from each other along the first direction, and at the moment, the first clamping jaws 32 on the two first push plates 31 are also far away from each other, namely in an opening state; meanwhile, the push rods 33 on the two first push plates 31 push the two second push plates 41 to be away from each other along the second direction, and at the moment, the second clamping jaws 42 on the two second push plates 41 are also away from each other, namely in an open state; because the clamping jaws of the whole clamping device are in an open state, the clamping effect on the workpiece 100 is not formed, and the movement of the workpiece 100 can be facilitated. When the driving mechanism 2 provides clamping power, the two first pushing plates 31 are close to each other along the first direction, and the first clamping jaws 32 on the two first pushing plates 31 are also close to each other, namely in a clamping state, so that two opposite edges of the workpiece 100 can be positioned and clamped along the first direction; meanwhile, the two elastic reset mechanisms push the two second push plates 41 to approach each other along the second direction, and at the moment, the second clamping jaws 42 on the two second push plates 41 are also close to each other, namely in a clamping state, so that the other two opposite edges of the workpiece 100 can be positioned and clamped along the second direction, and the simultaneous positioning and clamping of the four sides of the workpiece 100 is realized.

According to the clamping device provided by the utility model, the linkage control of the four groups of clamping jaws is realized through the driving mechanism 2, so that the four groups of clamping jaws can simultaneously position and clamp the periphery of the workpiece 100, and the clamping device has good synchronism, accurate positioning and firm clamping; and one driving mechanism 2 occupies small space and is convenient to arrange; and the number of the driving mechanisms 2 is reduced, so that the cost is effectively saved. The four groups of clamping jaws of the clamping device synchronously clamp the workpiece, are more convenient to operate, are more flexible to clamp the workpiece, and can be suitable for various working occasions.

Alternatively, referring to fig. 3, the elastic restoring mechanism of the present embodiment includes a mounting block 43, a stopper 44, a stopper post 45, and a compression spring 46. The mounting block 43 is fixed on the second push plate 41, and the mounting block 43 can move along with the movement of the second push plate 41; the limiting block 44 is fixed at one end of the base 1 through a fastener; one end of the limiting column 45 is fixedly connected with the mounting block 43, and the other end of the limiting column movably penetrates through the limiting block 44; the compression spring 46 is mounted on the stopper post 45 and is located between the mounting block 43 and the stopper 44. When the driving mechanism 2 drives the two first push plates 31 to expand outwards in the first direction, the two push rods 33 push the two second push plates 41 to expand outwards in the second direction, and at the same time, the compression springs 46 are compressed; when the driving mechanism 2 drives the two first push plates 31 to clamp inwards in the first direction, the push rod 33 releases the pressing action on the second push plates 41, and the compression springs 46 push the second push plates 41 to clamp inwards in the second direction. Preferably, in this embodiment, two sets of elastic restoring mechanisms are connected to each second push plate 41, so that the driving force of the second push plate 41 is more sufficient and the movement is smoother.

Further, with continued reference to fig. 3, a sliding mechanism is provided between the second push plate 41 and the base 1, the sliding mechanism specifically includes a rail mounting plate 47, a rail 48 and a slider 49, the rail mounting plate 47 is fixed to the base 1, the rail 48 is fixed to the rail mounting plate 47, and the rail 48 extends in the second direction; the sliding block 49 is slidably disposed on the guide rail 48, the sliding block 49 can slide along the guide rail 48 along the second direction, and the sliding block 49 is fixedly connected with the second push plate 41 through a fastener. So arranged, the second push plate 41 moves more smoothly and smoothly on the base 1. Preferably, the sliding mechanisms of the present embodiment are provided with two groups, and the two groups of sliding mechanisms are provided in one-to-one correspondence with the two second push plates 41.

Alternatively, as shown in fig. 2 to 3 and fig. 5 to 6, a push rod fixing block 34 is fixed to one side of the first push plate 31 adjacent to the second push plate 41 in this embodiment, the push rod fixing block 34 preferably extends in the first direction, and the push rod 33 is vertically fixed to the push rod fixing block 34. Specifically, the first push plates 31 are in a convex structure, and the convex ends of the two first push plates 31 are oppositely arranged; each push rod fixing block 34 is fixed to one side face of the protruding end of the corresponding first push plate 31, and two push rod fixing blocks 34 are staggered on two sides of the protruding end. By the arrangement, the first push plate 31 can run more smoothly, the structure of the first push plate 31 is simplified, and the occupied volume is reduced. Further, the end of the push rod 33 is provided with a rounded chamfer to achieve a better fit with the inclined surface 411, enabling a smoother and smoother operation of the second push plate 41. In addition, a smooth limit groove 412 is further provided at the bottom of the inclined surface 411 on the second push plate 41, and when the two first push plates 31 approach each other to the limit position, the push rod 33 cooperates with the limit groove 412.

In this embodiment, referring to fig. 3 to 6, a first mounting groove 311 is formed at the bottom of the first push plate 31, and the first clamping jaw 32 is fixed in the first mounting groove 311 by a fastener; the bottom of the second push plate 41 is provided with a second mounting groove 413, and the second clamping jaw 42 is fixed in the second mounting groove 413 by a fastener. Through setting up above-mentioned mounting groove for the installation of clamping jaw is convenient, the location is accurate. Further, the number of the first clamping jaws 32 on the first pushing plate 31 may be one, two or more, and the number of the second clamping jaws 42 on the second pushing plate 41 may be one, two or more, which can be flexibly set according to the size and clamping requirements of the workpiece 100. Preferably, in this embodiment, two first clamping jaws 32 are fixed on each first push plate 31 at intervals, and the first clamping jaws 32 on the two first push plates 31 are arranged in a one-to-one correspondence; meanwhile, two second clamping jaws 42 are fixed on each second push plate 41 at intervals, and the second clamping jaws 42 on the two second push plates 41 are arranged in a one-to-one correspondence. That is, in this embodiment, eight clamping jaws are provided to position and clamp the periphery of the workpiece 100, that is, two clamping jaws are provided for each edge of the workpiece 100. With this arrangement, accuracy in positioning and stability in clamping the workpiece 100 are improved.

As shown in fig. 7, the first clamping jaw 32 of the present embodiment is L-shaped and includes a first fixing portion 321, a first connecting portion 322 and a first clamping portion 323 that are integrally formed, wherein the first fixing portion 321 is perpendicular to the first connecting portion 322, the first fixing portion 321 and the first clamping portion 323 are located on the same side of the first connecting portion 322, the first fixing portion 321 is used for fixing the first push plate 31, the first connecting portion 322 is used for connecting the first fixing portion 321 and the first clamping portion 323, and the first clamping portion 323 is provided with a first groove 324 adapted to the edge thickness of the workpiece 100 and used for clamping the edge of the workpiece 100. Similarly, as shown in fig. 8, the second clamping jaw 42 is also L-shaped and includes a second fixing portion 421, a second connecting portion 422 and a second clamping portion 423 that are integrally formed, wherein the second fixing portion 421 is disposed perpendicular to the second connecting portion 422, the second fixing portion 421 and the second clamping portion 423 are located on the same side of the second connecting portion 422, the second fixing portion 421 is used for fixing the second push plate 41, the second connecting portion 422 is used for connecting the second fixing portion 421 and the second clamping portion 423, and the second clamping portion 423 is provided with a second groove 424 adapted to the edge thickness of the workpiece 100 for clamping the edge of the workpiece 100. The first clamping jaw 32 and the second clamping jaw 42 have simple structure, easy processing and convenient installation and use. Of course, in other embodiments, the first clamping jaw 32 and the second clamping jaw 42 may take other structures, which is not limited to the present embodiment.

As shown in fig. 9, alternatively, the driving mechanism 2 of the present embodiment is a parallel sliding table finger cylinder, and the parallel sliding table finger cylinder includes a cylinder 21, a linear sliding rail 22 mounted on the cylinder 21, and two air pawls 23 capable of sliding along the linear sliding rail 22, where the two air pawls 23 are fixedly connected with two first push plates 31 in a one-to-one correspondence manner. In operation, the air cylinder drives the two air pawls 23 toward or away from each other, thereby driving the two first push plates 31 toward or away from each other. The parallel sliding table finger cylinder provided by the embodiment has the advantages of simple structure, portability, simple installation and maintenance, stable operation, high motion accuracy and long service life; and because the cylinder body and the workbench are integrally arranged, the whole size is small, and the space is saved. Of course, in other embodiments, the driving mechanism 2 may be implemented by other structures, which is not limited to the present embodiment, for example, a motor may be used to drive a double-ended screw to rotate, and the double-ended screw drives two nut blocks thereon to approach or separate from each other.

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims

1. Clamping device, its characterized in that includes:

a base (1);

the driving mechanism (2) is fixed on the base (1);

the first direction clamping assembly (3) comprises two first pushing plates (31) which are oppositely arranged along the first direction, and the driving mechanism (2) can simultaneously drive the two first pushing plates (31) to be close to or far away from each other along the first direction; a first clamping jaw (32) is fixed on each of the two first pushing plates (31), and the first clamping jaws (32) are used for clamping two opposite edges of a workpiece (100) along a first direction; push rods (33) arranged along a second direction are fixed on the two first push plates (31), the extending directions of the two push rods (33) deviate from each other, and the second direction is perpendicular to the first direction;

the second direction clamping assembly (4) comprises two second pushing plates (41) which are oppositely arranged along the second direction, the second pushing plates (41) are in sliding connection with the base (1), second clamping jaws (42) are fixed on the two second pushing plates (41), and the second clamping jaws (42) are used for clamping the other two opposite edges of the workpiece (100) along the second direction; one ends of the two second pushing plates (41) close to each other are respectively provided with an inclined surface (411), the push rods (33) are abutted against the inclined surfaces (411), and when the two first pushing plates (31) are far away from each other, the two push rods (33) can push the two second pushing plates (41) to be far away from each other along the second direction; elastic reset mechanisms are arranged between the two second push plates (41) and the base (1), and when the two first push plates (31) are close to each other, the two elastic reset mechanisms can push the two second push plates (41) to be close to each other along the second direction.

2. The clamping device as recited in claim 1, characterised in that said resilient return means comprises:

a mounting block (43) fixed to the second push plate (41);

the limiting block (44) is fixed on the base (1);

one end of the limiting column (45) is fixedly connected with the mounting block (43), and the other end of the limiting column movably penetrates through the limiting block (44);

and the compression spring (46) is arranged on the limit column (45) and is positioned between the mounting block (43) and the limit block (44).

3. Clamping device according to claim 1, characterized in that a sliding mechanism is provided between the second push plate (41) and the base (1), said sliding mechanism comprising:

a guide rail mounting plate (47) fixed to the base (1);

a guide rail (48) fixed to the guide rail mounting plate (47), the guide rail (48) extending in the second direction;

and the sliding block (49) is slidably arranged on the guide rail (48), and the sliding block (49) is fixedly connected with the second push plate (41).

4. Clamping device according to claim 1, characterized in that a push rod fixing block (34) is fixed to one side of the first push plate (31) close to the second push plate (41), and the push rod (33) is fixed to the push rod fixing block (34).

5. Clamping device according to claim 1, characterized in that the end of the push rod (33) is provided with a rounded chamfer.

6. Clamping device according to claim 5, characterized in that the second push plate (41) is further provided with a rounded limit groove (412) at the bottom of the inclined surface (411), and the push rod (33) cooperates with the limit groove (412) when the two first push plates (31) approach each other to the limit position.

7. Clamping device according to claim 1, characterized in that the bottom of the first push plate (31) is provided with a first mounting groove (311), the first clamping jaw (32) being fixed in the first mounting groove (311); and/or

The bottom of the second push plate (41) is provided with a second mounting groove (413), and the second clamping jaw (42) is fixed in the second mounting groove (413).

8. Clamping device according to claim 1, characterized in that at least two first clamping jaws (32) are fixed on each first push plate (31) at intervals, and the first clamping jaws (32) on the two first push plates (31) are arranged in a one-to-one correspondence; and/or

At least two second clamping jaws (42) are fixed on each second push plate (41) at intervals, and the second clamping jaws (42) on the two second push plates (41) are arranged in a one-to-one correspondence mode.

9. Clamping device according to claim 1, characterized in that the first clamping jaw (32) comprises a first fixing portion (321), a first connecting portion (322) and a first clamping portion (323) which are sequentially arranged, wherein the first fixing portion (321) is used for fixing with the first push plate (31), the first connecting portion (322) is used for connecting the first fixing portion (321) and the first clamping portion (323), and the first clamping portion (323) is provided with a first groove (324) which is matched with the edge thickness of the workpiece (100) and is used for clamping the edge of the workpiece (100); and/or

The second clamping jaw (42) comprises a second fixing portion (421), a second connecting portion (422) and a second clamping portion (423) which are sequentially arranged, the second fixing portion (421) is used for being fixed with the second pushing plate (41), the second connecting portion (422) is used for being connected with the second fixing portion (421) and the second clamping portion (423), and the second clamping portion (423) is provided with a second groove (424) which is matched with the edge thickness of the workpiece (100) and used for clamping the edge of the workpiece (100).

10. Clamping device according to any one of claims 1-9, wherein the driving mechanism (2) is a parallel sliding table finger cylinder, and comprises a cylinder body (21), a linear sliding rail (22) arranged on the cylinder body (21), and two air pawls (23) capable of sliding along the linear sliding rail (22), wherein the two air pawls (23) are fixedly connected with the two first pushing plates (31) in a one-to-one correspondence manner.