CN216398858U

CN216398858U - Pneumatic clamp

Info

Publication number: CN216398858U
Application number: CN202122963335.1U
Authority: CN
Inventors: 李谦存
Original assignee: Taizhou Ruikelang Automation Equipment Co ltd
Current assignee: Taizhou Ruikelang Automation Equipment Co ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-04-29
Anticipated expiration: 2031-11-26

Abstract

The utility model discloses a pneumatic clamp, which belongs to the technical field of machining equipment and comprises a clamp seat, wherein the clamp seat comprises a base (1) and a fixed frame (2), a mounting hole is formed in the fixed frame (2), a clamping part (3) is arranged in the mounting hole, the clamping part (3) comprises a first clamping plate (37) and a second clamping plate (38), a gap (4) is arranged between the first clamping plate (37) and the second clamping plate (38), an inclined plane I (5) is arranged on the outer surface of the first clamping plate (37), an inclined plane II (6) is arranged in the mounting hole, an inclined plane III (7) is arranged on the outer surface of the second clamping plate (38), an inclined plane IV (8) is arranged in the mounting hole, a driving part is arranged on the base (1), the lower surface of a workpiece (39) is supported through a reference surface (12) of a supporting plate (9), and two side surfaces of the workpiece (39) are clamped and positioned through the first clamping plate (37) and the second clamping plate (38), the stability of clamping the flat workpiece is ensured.

Description

Pneumatic clamp

Technical Field

The utility model belongs to the technical field of machining equipment, and particularly relates to a pneumatic clamp for clamping a flat workpiece, particularly a workpiece with thin side edges.

Background

When a workpiece is machined on a machine tool, in order to enable the dimensional accuracy of the workpiece to meet the specified technical requirements, the workpiece needs to be clamped and positioned before machining, so that the workpiece needs to be placed on a clamp for fixing, the workpiece occupies a correct position for receiving machining or detection, the machining quality of the workpiece is improved, and the standardization of workpiece production is guaranteed.

The existing clamp is various and can clamp and fix the side edge or the inner cavity of the workpiece, but for the flat workpiece, the clamp is inconvenient to use a conventional clamp to clamp, because the area of the two side surfaces of the flat workpiece is small, the clamp is in the process of clamping the workpiece, and the clamp lacks sufficient force points, so that the level of the workpiece during positioning cannot be guaranteed, and particularly when the side edge of the flat workpiece is thin, the workpiece can be shaken and the like, so that the processing precision is influenced.

SUMMERY OF THE UTILITY MODEL

The pneumatic clamp aims to overcome the technical problems that a clamp in the prior art is inconvenient to clamp a flat workpiece and the like, and provides the pneumatic clamp capable of clamping the flat workpiece, so that the stability of workpiece processing is ensured, and the quality and the precision of the workpiece are improved.

In order to solve the technical problem, the utility model provides a pneumatic clamp, which comprises a clamp seat, wherein the clamp seat comprises a base and a fixed frame arranged on the base, the fixing frame is provided with a mounting hole, a clamping part is arranged in the mounting hole and comprises a first clamping plate and a second clamping plate which are oppositely arranged along the axial direction of the mounting hole, a gap for placing a workpiece is arranged between the inner surface of the first clamping plate and the inner surface of the second clamping plate, the outer surface of one end of the clamping plate I, which is close to the workpiece, is provided with a first inclined surface, a second inclined surface corresponding to the first inclined surface is arranged in the mounting hole, the outer surface of one end of the clamping plate II, which is close to the workpiece, is provided with a bevel III, a bevel IV corresponding to the bevel III is arranged in the mounting hole, and the base is provided with a driving part for driving the first clamping plate and the second clamping plate to move along the axial direction of the mounting hole.

As a further improvement measure of the present invention, a supporting plate is disposed in the mounting hole, the supporting plate is disposed in a gap between an inner surface of the first clamping plate and an inner surface of the second clamping plate, the supporting plate divides the mounting hole into a first through hole for placing the first clamping plate and a second through hole for placing the second clamping plate, the second inclined surface is disposed in the first through hole, the fourth inclined surface is disposed in the second through hole, an upper surface of the supporting plate is a reference surface contacting with the workpiece, and the reference surface is flush with an upper surface of the fixing frame. The workpiece is placed on the supporting plate, and the lower surface of the workpiece is supported by the reference surface.

As a further improvement measure of the utility model, the lower end of the first clamping plate is provided with at least two first connecting holes, the lower end of the second clamping plate is provided with at least two second connecting holes corresponding to the first connecting holes, connecting pieces are inserted into the first connecting holes and the second connecting holes, the upper end of the first clamping plate is provided with a rectangular first clamping part, the upper end of the second clamping plate is provided with a rectangular second clamping part, when a workpiece is clamped, the upper surface of the first clamping part is flush with the upper surface of the second clamping part, and the horizontal heights of the upper surfaces of the first clamping part and the second clamping part are higher than the horizontal height of the reference surface. A U-shaped space for placing the workpiece is formed among the first clamping part, the second clamping part and the reference surface, and positioning and clamping of two side surfaces and the lower surface of the workpiece are achieved.

As a further improvement measure of the present invention, the fixing frame is provided with an installation groove, the installation groove and the supporting plate are arranged on the same horizontal line, and a limiting member contacting with an end portion of one end of the workpiece is arranged in the installation groove.

As a further improvement measure of the utility model, a first matching clamping block in contact with the first clamping plate is detachably arranged in the first through hole, the first matching clamping block is trapezoidal, one side surface of the first matching clamping block in contact with the first clamping plate is an inclined surface II, a second matching clamping block in contact with the second clamping plate is detachably arranged in the second through hole, the second matching clamping block is trapezoidal, and one side surface of the second matching clamping block in contact with the second clamping plate is an inclined surface IV. The first matched clamping block and the second matched clamping block can be replaced conveniently.

As a further improvement measure of the present invention, the driving component includes a driving component disposed on the base, a connecting rod connected to an output end of the driving component, and a rocker respectively connected to ends of the first clamping plate and the second clamping plate far away from the workpiece, wherein an end of the connecting rod far away from the driving component is hinged to an end of the rocker far away from the first clamping plate and the second clamping plate.

As a further improvement measure of the utility model, a third through hole is formed in the connecting rod, the third through hole is formed in one end, close to the rocker, of the connecting rod, a supporting rod is inserted into the third through hole and movably connected with the connecting rod, and two ends of the supporting rod are fixedly connected with two side faces of the fixing frame respectively. The lever principle is utilized, so that the distance of the power arm on the connecting rod is greater than that of the resistance arm, and the aim of saving labor is fulfilled.

As a further improvement measure of the utility model, a connecting part is arranged at one end of the rocker, which is respectively connected with the first clamping plate and the second clamping plate, a third connecting hole is formed in the connecting part, a fourth connecting hole corresponding to the third connecting hole is formed in one end of the first clamping plate, which is far away from the workpiece, a fifth connecting hole corresponding to the third connecting hole and the fourth connecting hole is formed in one end of the second clamping plate, which is far away from the workpiece, and a second connecting piece is inserted in the third connecting hole, the fourth connecting hole and the fifth connecting hole. The rocker is connected with the first clamping plate and the second clamping plate.

As a further improvement measure of the utility model, one end of the rocker, which is far away from the connecting part, is provided with a groove corresponding to the connecting rod, two side surfaces of the groove are respectively provided with a first hinge hole, one end of the connecting rod, which is connected with the rocker, is provided with a second hinge hole corresponding to the first hinge hole, and a pin shaft is inserted in the first hinge hole and the second hinge hole. The connection between the rocker and the connecting rod is realized.

Compared with the prior art, the utility model has the beneficial effects that: 1. the workpiece is placed on the supporting plate, the lower surface of the workpiece is supported, the horizontal position of the workpiece is determined, and then the two side surfaces of the workpiece are clamped and positioned through the first clamping plate and the second clamping plate; 2. in the utility model, the upper surface of the fixing frame is also provided with a limiting part which is contacted with the end part of the workpiece and is used for ensuring the transverse position of the workpiece on the supporting frame, ensuring the clamping position of each workpiece on the pneumatic fixture to be the same and ensuring the processing identity and standardization of the workpiece; 3. the driving component utilizes a lever principle, has a simple structure, mainly drives the connecting rod to rotate around the supporting rod when the driving component drives the driving component up and down along the longitudinal direction, thereby realizing that the rocker drives the first clamping plate and the second clamping plate to move along the longitudinal direction to clamp or loosen a workpiece, and the power arm of the connecting rod is larger than the resistance arm of the connecting rod, thereby saving more labor and being beneficial to improving the production efficiency.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a top view of the present invention.

Fig. 3 is a left side view of the present invention.

Fig. 4 is a sectional view taken along the line a-a in fig. 3.

Fig. 5 is an enlarged perspective view of one of the clamping members of the present invention.

Fig. 6 is an enlarged perspective view of the second clamping member of the present invention.

Fig. 7 is an enlarged front view of the clamping member of the present invention.

Fig. 8 is a sectional view taken along line B-B in fig. 7.

Fig. 9 is an enlarged perspective view of the fixing frame of the present invention.

Fig. 10 is an enlarged top view of the mount of the present invention.

Fig. 11 is an enlarged perspective view of a first splint and a second splint of the present invention.

Fig. 12 is an enlarged right side view of a splint one and a splint two of the present invention.

Fig. 13 is a perspective view of the drive member of the present invention.

Fig. 14 is a front view of the drive member of the present invention.

FIG. 15 is an enlarged perspective view of the resistance element of the present invention.

FIG. 16 is an enlarged front view of the resistance element of the present invention.

FIG. 17 is an enlarged perspective view of the power rod of the present invention.

FIG. 18 is an enlarged front view of the power rod of the present invention.

The reference numbers illustrate: 1-base, 2-fixing frame, 3-clamping part, 4-gap, 5-inclined plane I, 6-inclined plane II, 7-inclined plane III, 8-inclined plane IV, 9-supporting plate, 10-through hole I, 11-through hole II, 12-datum plane, 13-connecting hole I, 14-connecting hole II, 15-connecting piece I, 16-clamping part I, 17-clamping part II, 18-mounting groove, 19-limiting piece, 20-matching clamping block I, 21-matching clamping block II, 22-driving piece, 23-connecting rod, 24-rocker, 25-connecting part, 26-connecting hole III, 27-connecting hole IV, 28-connecting hole V, 30-hinge hole II, 31-groove, 32-hinge hole I, 32-hinge hole II, 33-pin shaft, 34-through hole III, 35-support rod, 37-clamping plate I, 38-clamping plate II and 39-workpiece.

Detailed Description

The utility model will be further explained with reference to the drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

On the contrary, the utility model is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the utility model as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.

The pneumatic clamp shown in fig. 1 to 3 includes a clamp base, the clamp base includes a base 1 and a fixing frame 2 disposed on the base 1, in this embodiment, the fixing frame 2 includes two first fixing plates disposed on the base 1 along a longitudinal direction, and a second fixing plate disposed on end surfaces of upper ends of the two first fixing plates along a horizontal direction, the second fixing plates are parallel to the base 1, and the first fixing plates and the second fixing plates may also be disposed as an integral structure.

As shown in fig. 1, 9 to 12, the fixing frame 2 is provided with a mounting hole, and in the present embodiment, the mounting hole is provided on the second fixing plate. The clamping component 3 is arranged in the mounting hole, the clamping component 3 comprises a first clamping plate 37 and a second clamping plate 38 which are oppositely arranged along the axial direction of the mounting hole, and a gap 4 for placing a workpiece 39 is arranged between the inner surface of the first clamping plate 37 and the inner surface of the second clamping plate 38. The outer surface of one end of the first clamping plate 37, which is close to the workpiece 39, is provided with a first inclined surface 5, the outer surface of one end of the second clamping plate 38, which is close to the workpiece 39, is provided with a second inclined surface 6 corresponding to the first inclined surface 5, the outer surface of one end of the second clamping plate 38 is provided with a third inclined surface 7, and the inner surface of the mounting hole is provided with a fourth inclined surface 8 corresponding to the third inclined surface 7.

The base 1 is provided with a driving component for driving the first clamping plate 37 and the second clamping plate 38 to move along the axial direction of the mounting hole, so that the distance of the gap 4 between the first clamping plate 37 and the second clamping plate 38 is adjusted, and the workpiece 39 is clamped or loosened. In the present embodiment, since the inclined surface one 5 is engaged with the inclined surface two 6, and the inclined surface three 7 is engaged with the inclined surface four 8, when the driving part drives the clamping plate one 37 and the clamping plate two 38 to move downward in the mounting hole along the axial direction of the mounting hole, the clamping plate one 37 and the clamping plate two 38 are engaged to clamp the workpiece 39, and when the driving part drives the clamping plate one 37 and the clamping plate two 38 to move upward in the mounting hole along the axial direction of the mounting hole, the clamping plate one 37 and the clamping plate two 38 loosen the workpiece 39.

As shown in fig. 6 to 8, in order to ensure that the first clamping plate 37 and the second clamping plate 38 realize synchronous movement under the driving of the driving component, the lower end of the first clamping plate 37 is provided with at least two connecting holes first 13, the lower end of the second clamping plate 38 is provided with at least two connecting holes second 14 corresponding to the connecting holes first 13, a first connecting piece 15 is inserted into the connecting holes first 13 and second connecting holes second 14, the lower ends of the first clamping plate 37 and the second clamping plate 38 are fixedly connected through the first connecting piece 15, and the first clamping plate 37 and the second clamping plate 38 are ensured to synchronously move upwards or downwards in the mounting hole along the axial direction of the mounting hole.

As shown in fig. 5, 8 and 9, when processing the upper surface, the flat workpiece 39 is not convenient to clamp on both sides, so it is necessary to support and position the lower surface of the workpiece 39 that is not processed, in this embodiment, a support plate 9 is disposed in the mounting hole, the support plate 9 is disposed in the gap 4 between the inner surface of the first clamping plate 37 and the inner surface of the second clamping plate 38, and the workpiece 39 can be placed on the support plate 9 for support, in this embodiment, the support plate 9 and the second fixing plate of the fixing frame 2 are an integral structure. The upper surface of the supporting plate 9 is set to be a reference surface 12 which is in contact with the workpiece 39, and the reference surface 12 is flush with the upper surface of the fixing frame 2, so that the level of the workpiece 39 in the processing process can be ensured on one hand, and the workpiece 39 is higher than the upper surface of the fixing frame 2 on the other hand, thereby being convenient for processing.

As shown in fig. 8, 11 and 12, the upper end of the first clamping plate 37 is provided with a rectangular first clamping portion 16, the upper end of the second clamping plate 38 is provided with a rectangular second clamping portion 17, and the first clamping plate 37 and the second clamping plate 38 are mainly in contact with the workpiece 39 through the first clamping portion 16 and the second clamping portion 17 in the clamping process, so that the two sides of the workpiece 39 are clamped and positioned, the upper surface of the first clamping portion 16 is flush with the upper surface of the second clamping portion 17, the first clamping portion 16 and the second clamping portion 17 are uniformly stressed in the clamping process, and the workpiece 39 is prevented from shaking. In this embodiment, when the first clamping plate 37 and the second clamping plate 38 move towards each other to clamp the workpiece 39, the upper surfaces of the first clamping portion 16 and the second clamping portion 17 are flush with the upper surface of the workpiece 39 to be machined, so that the upper surface of the workpiece 39 can be completely exposed, the first clamping portion 16 and the second clamping portion 17 do not shield the upper surface of the workpiece 39 to be machined, and the horizontal heights of the upper surfaces of the first clamping portion 16 and the second clamping portion 17 are all higher than the horizontal height of the reference surface 12, so that a U-shaped space can be formed among the first clamping portion 16, the reference surface 12 and the second clamping portion 17 for placing the workpiece 39, and the two sides and the lower surface of the workpiece 39 not to be machined are positioned and clamped.

As shown in fig. 8 to 10, the mounting hole is divided into a first through hole 10 for placing the first clamping plate 37 and a second through hole 11 for placing the second clamping plate 38 by the supporting plate 9, the second inclined surface 6 is arranged in the first through hole 10, and the fourth inclined surface 8 is arranged in the second through hole 11. In order to adjust the angles between the first inclined plane 5, the second inclined plane 6, the third inclined plane 7 and the fourth inclined plane 8 conveniently, so that workpieces with different sizes can be clamped, the first matched clamping block 20 in contact with the first clamping plate 37 is detachably arranged in the first through hole 10, the first matched clamping block 20 is trapezoidal, one side face, in contact with the first clamping plate 37, of the first matched clamping block 20 is arranged to be the second inclined plane 6, the second matched clamping block 21 in contact with the second clamping plate 38 is detachably arranged in the second through hole 11, the second matched clamping block 21 is trapezoidal, and one side face, in contact with the second clamping plate 38, of the second matched clamping block 21 is arranged to be the fourth inclined plane 8. Therefore, the angles of the first inclined surface 5 and the third inclined surface 7 can be adjusted by replacing the first clamping plate 37 and the second clamping plate 38, and the angles of the second inclined surface 6 and the fourth inclined surface 8 can be adjusted by replacing the first matched clamping block 20 and the second matched clamping block 21, so that the whole pneumatic clamp cannot be influenced. In this embodiment, the first mating clamping block 20 is connected to the fixing frame 2 by a first longitudinally disposed fastening member, and the second mating clamping block 21 is connected to the fixing frame 2 by a second longitudinally disposed fastening member.

As shown in fig. 1, 5, 9 and 10, the fixing frame 2 is provided with an installation groove 18, the installation groove 18 and the supporting plate 9 are arranged on the same horizontal line, a limiting member 19 contacting with one end of the workpiece 39 is arranged in the installation groove 18, and the limiting member 19 can limit the position of the workpiece 39 on the supporting plate 9, so that the processing uniformity of each workpiece is ensured, and the processing quality of the workpiece and the standardization of processing production are ensured.

As shown in fig. 1, 13 and 14, the driving part includes a driving part 22 disposed on the base 1, a connecting rod 23 connected to an output end of the driving part 22, and a rocker 24 connected to an end of the first clamping plate 37 and an end of the second clamping plate 38 away from the workpiece 39, respectively, the driving part 22 is configured as an air cylinder, and an end of the connecting rod 23 away from the driving part 22 is hinged to an end of the rocker 24 away from the first clamping plate 37 and the second clamping plate 38. As shown in fig. 13, 14, 17 and 18, the connecting rod 23 is provided with a third through hole 34, a supporting rod 35 is inserted into the third through hole 34, the supporting rod 35 is movably connected with the connecting rod 23, and two ends of the supporting rod 35 are respectively fixedly connected with two side surfaces of the fixing frame 2.

As shown in fig. 1, 8, 13 and 14, in this embodiment, when the output end of the driving member 22 is driven upward, the connecting rod 23 rotates around the supporting rod 35 according to the lever principle, and the horizontal height of the end of the connecting rod 23 connected with the driving member 22 is higher than the horizontal height of the end of the connecting rod 23 connected with the rocker 24, so that the rocker 24 drives the first clamping plate 37 and the second clamping plate 38 to move downward along the axial direction of the first through hole 10 and the second through hole 11, respectively, to clamp the workpiece 39; when the output end of the driving member 22 is driven downwards, similarly, according to the lever principle, the connecting rod 23 rotates around the supporting rod 35, and the horizontal height of the end of the connecting rod 23 connected with the rocker 24 is higher than that of the end of the connecting rod 23 connected with the driving member 22, so that the rocker 24 drives the first clamping plate 37 and the second clamping plate 38 to move upwards along the axial direction of the first through hole 10 and the axial direction of the second through hole 11 respectively, and the workpiece 39 is loosened.

As shown in fig. 13, 14, 17 and 18, the third through hole 34 is formed at one end of the connecting rod 23 close to the rocker 24, so that the length of the power arm on the connecting rod 23 is greater than that of the resistance arm, and the driving of the driving member 22 can be more labor-saving.

As shown in fig. 3, 4, 6, 13 to 16, in order to realize the connection between the rocker 24 and the first and

second clamping plates

37, 38, a connecting portion 25 is disposed at one end of the rocker 24 connected to the first and

second clamping plates

37, 38, respectively, a connecting hole three 26 is disposed on the connecting portion 25, a connecting hole four 27 corresponding to the connecting hole three 26 is disposed at one end of the first clamping plate 37 away from the workpiece 39, a connecting hole five 28 corresponding to the connecting hole three 26, the connecting hole four 27, the connecting hole five 28 is disposed at one end of the second clamping plate 38 away from the workpiece 39, and a connecting member two is inserted into the connecting hole three 26, the connecting hole four 27, and the connecting hole five 28.

As shown in fig. 13 to 18, in order to realize the hinge connection between the rocker 24 and the connecting rod 23, a groove 31 corresponding to the connecting rod 23 is formed in one end of the rocker 24 away from the connecting portion 25, two side surfaces of the groove 31 are respectively formed with a first hinge hole 32, a second hinge hole 30 corresponding to the first hinge hole 32 is formed in one end of the connecting rod 23 connected to the rocker 24, and a pin 33 is inserted into the first hinge hole 32 and the second hinge hole 30.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and it will be apparent to those skilled in the art that several modifications and improvements may be made without departing from the present invention, and these should be construed as falling within the scope of the present invention.

Claims

1. The pneumatic clamp comprises a clamp seat and is characterized in that the clamp seat comprises a base (1) and a fixing frame (2) arranged on the base (1), a mounting hole is formed in the fixing frame (2), a clamping part (3) is arranged in the mounting hole, the clamping part (3) comprises a first clamping plate (37) and a second clamping plate (38) which are oppositely arranged along the axial direction of the mounting hole, a gap (4) for placing a workpiece (39) is formed between the inner surface of the first clamping plate (37) and the inner surface of the second clamping plate (38), a first inclined plane (5) is arranged on the outer surface of one end, close to the workpiece (39), of the first clamping plate (37), a second inclined plane (6) corresponding to the first inclined plane (5) is arranged in the mounting hole, and a third inclined plane (7) is arranged on the outer surface of one end, close to the workpiece (39), of the second clamping plate (38), and a fourth inclined plane (8) corresponding to the third inclined plane (7) is arranged in the mounting hole, and a driving part for driving the first clamping plate (37) and the second clamping plate (38) to move along the axial direction of the mounting hole is arranged on the base (1).

2. The pneumatic clamp according to claim 1, wherein a support plate (9) is disposed in the mounting hole, the support plate (9) is disposed at a gap (4) between an inner surface of the first clamping plate (37) and an inner surface of the second clamping plate (38), the support plate (9) divides the mounting hole into a first through hole (10) for placing the first clamping plate (37) and a second through hole (11) for placing the second clamping plate (38), the second inclined surface (6) is disposed in the first through hole (10), the fourth inclined surface (8) is disposed in the second through hole (11), an upper surface of the support plate (9) is disposed as a reference surface (12) which is in contact with the workpiece (39), and the reference surface (12) is flush with an upper surface of the fixed frame (2).

3. The pneumatic clamp according to claim 2, wherein the lower end of the first clamping plate (37) is provided with at least two connecting holes I (13), the lower end of the second clamping plate (38) is provided with at least two connecting holes (14) corresponding to the connecting holes (13), a connecting piece (15) is inserted in the connecting hole I (13) and the connecting hole II (14), the upper end of the first clamping plate (37) is provided with a rectangular first clamping part (16), the upper end of the second clamping plate (38) is provided with a rectangular second clamping part (17), when the workpiece (39) is clamped, the upper surface of the first clamping part (16) is flush with the upper surface of the second clamping part (17), and the horizontal heights of the upper surfaces of the first clamping part (16) and the second clamping part (17) are higher than the horizontal height of the reference surface (12).

4. The pneumatic clamp according to claim 3, wherein the fixing frame (2) is provided with a mounting groove (18), the mounting groove (18) and the supporting plate (9) are arranged on the same horizontal line, and a limiting member (19) contacting with one end of a workpiece (39) is arranged in the mounting groove (18).

5. The pneumatic clamp according to claim 2, wherein a first matching clamping block (20) which is in contact with the first clamping plate (37) is detachably arranged in the first through hole (10), the first matching clamping block (20) is trapezoidal, one side surface, in contact with the first clamping plate (37), of the first matching clamping block (20) is provided with a second inclined surface (6), a second matching clamping block (21) which is in contact with the second clamping plate (38) is detachably arranged in the second through hole (11), the second matching clamping block (21) is trapezoidal, and one side surface, in contact with the second clamping plate (38), of the second matching clamping block (21) is provided with a fourth inclined surface (8).

6. The pneumatic clamp according to any one of claims 1 to 5, wherein the driving component comprises a driving member (22) arranged on the base (1), a connecting rod (23) connected with an output end of the driving member (22), and a rocker (24) respectively connected with one ends of the first clamping plate (37) and the second clamping plate (38) far away from the workpiece (39), wherein one end of the connecting rod (23) far away from the driving member (22) is hinged with one ends of the rocker (24) far away from the first clamping plate (37) and the second clamping plate (38).

7. The pneumatic clamp according to claim 6, wherein a third through hole (34) is formed in the connecting rod (23), the third through hole (34) is formed in one end, close to the rocker (24), of the connecting rod (23), a supporting rod (35) is inserted into the third through hole (34), the supporting rod (35) is movably connected with the connecting rod (23), and two ends of the supporting rod (35) are fixedly connected with two side faces of the fixing frame (2) respectively.

8. The pneumatic clamp according to claim 6, wherein a connecting portion (25) is arranged at one end of the rocker (24) connected with the first clamping plate (37) and the second clamping plate (38), a connecting hole three (26) is formed in the connecting portion (25), a connecting hole four (27) corresponding to the connecting hole three (26) is formed in one end of the first clamping plate (37) far away from the workpiece (39), a connecting hole five (28) corresponding to the connecting hole three (26) and the connecting hole four (27) is formed in one end of the second clamping plate (38) far away from the workpiece (39), and a connecting piece two is inserted into the connecting hole three (26), the connecting hole four (27) and the connecting hole five (28).

9. The pneumatic clamp according to claim 8, wherein a groove (31) corresponding to the connecting rod (23) is formed in one end, away from the connecting portion (25), of the rocker (24), a first hinge hole (32) is formed in each of two side faces of the groove (31), a second hinge hole (30) corresponding to the first hinge hole (32) is formed in one end, connected with the rocker (24), of the connecting rod (23), and a pin shaft (33) is inserted into the first hinge hole (32) and the second hinge hole (30).