CN215748782U

CN215748782U - Take battery case anchor clamps of hydraulic pressure upset

Info

Publication number: CN215748782U
Application number: CN202122058375.1U
Authority: CN
Inventors: 宋瑞华; 任圣权
Original assignee: SUZHOU WID ELECTROMECHANICAL AUTOMATION CO Ltd
Current assignee: SUZHOU WID ELECTROMECHANICAL AUTOMATION CO Ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-02-08
Anticipated expiration: 2031-08-30

Abstract

The utility model discloses a battery box clamp with hydraulic overturn, which comprises: the device comprises a workbench, a top turnover mechanism, a pressing mechanism, an operating valve, an oil cylinder puller, a workpiece ejector and a battery box; the two top turnover mechanisms are respectively arranged at the left end and the right end of the rear side of the top end of the workbench; the pressing mechanisms are arranged on the front side of the workbench in a clearance mode; the plurality of oil cylinder tightening devices are respectively arranged on the left side and the right side of the top end of the workbench and the front side of the top end of the workbench in a clearance manner and are positioned at the clearance between two adjacent pressing mechanisms; the battery box is detachably arranged on the upper surface of the workbench and positioned on the inner sides of the plurality of oil cylinder jacking devices. This take hydraulic pressure upset's battery case anchor clamps can realize carrying out multi-direction ascending fixed simultaneously to battery case all around and the top to carry out quick fixed to battery case processing department, the battery case work piece of being convenient for is dismantled simultaneously, improves the fixed stability of battery case work piece, and then improves the machining precision.

Description

Take battery case anchor clamps of hydraulic pressure upset

Technical Field

The utility model relates to the technical field of welding automation, in particular to a battery box clamp with hydraulic overturning.

Background

Automation (Automation) refers to a process of realizing an expected target by automatic detection, information processing, analysis and judgment, and manipulation control of machine equipment, systems or processes (production and management processes) according to human requirements without direct participation of people or few people. The automation technology is widely used in the aspects of industry, agriculture, military, scientific research, transportation, commerce, medical treatment, service, family and the like, and the authorized bulletin numbers in the prior art are as follows: CN 212496642U's utility model discloses a battery case assembly anchor clamps, this battery case assembly anchor clamps include: the battery box assembly is characterized by comprising a bottom plate, wherein Z-axis pressing oil cylinders are symmetrically arranged on the left and right sides of the upper part of the bottom plate, and pressing arms of the Z-axis pressing oil cylinders press the battery box assembly downwards; two X-axis clamping oil cylinders are symmetrically arranged on the bottom plate along the X axis, and the X-axis pressing oil cylinders tightly press the side face of the battery box assembly; two pairs of Y-axis pressing oil cylinders are symmetrically fixed on the bottom plate along the Y axis, the Y-axis pressing oil cylinders press the battery box assembly, the X axis, the Y axis and the Z axis are perpendicular to each other, and the Z axis is perpendicular to the bottom plate; the bottom plate is also fixedly provided with a first supporting oil cylinder, and the first supporting oil cylinder is arranged at the front part of the bottom plate and is used for supporting the top of the side surface of the battery box assembly. The technical problem of add to battery case assembly and hold unstability has been solved in this application, but this anchor clamps can only fix the position around the battery case, lack the top to the battery case work piece fixed on a large scale, and anchor clamps fixity is relatively poor, and then produces the removal because of factors such as vibrations in making the follow-up course of working of battery case easily, and then influences the machining precision.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a battery box clamp with hydraulic overturn, which at least solves the problems that the clamp in the prior art can only fix the peripheral part of a battery box, the top of a battery box workpiece is not fixed in a large range, the clamp is poor in fixity, and further the battery box is easy to move due to factors such as vibration in the subsequent processing process, and the processing precision is influenced.

In order to achieve the purpose, the utility model provides the following technical scheme: a battery case clamp with hydraulic flipping, comprising: the device comprises a workbench, a top turnover mechanism, a pressing mechanism, an operating valve, an oil cylinder puller, a workpiece ejector and a battery box; the number of the top turnover mechanisms is two, and the two top turnover mechanisms are respectively arranged at the left end and the right end of the rear side of the top end of the workbench; the number of the pressing mechanisms is a plurality, and the plurality of pressing mechanisms are arranged on the front side of the workbench in a clearance mode; the operating valve is arranged on the outer side of the workbench; the number of the oil cylinder tightening devices is a plurality, and the oil cylinder tightening devices are respectively arranged on the left side and the right side of the top end of the workbench and the front side of the top end of the workbench in a clearance manner and are positioned at the clearance between two adjacent pressing mechanisms; the workpiece lifters are arranged at the top opening of the workbench respectively; the battery box is detachably arranged on the upper surface of the workbench and positioned on the inner sides of the plurality of oil cylinder jacking devices.

Preferably, the top turnover mechanism includes: the device comprises a first mounting seat, a rotating shaft, a top plate, a pressing plate and a limiting slot; the first mounting seat is arranged on the rear side of the top end of the workbench along the left-right direction; the rotating shaft is rotatably connected to the inner side of the first mounting seat through a bearing along the left-right direction; the top plate is arranged on the outer wall of the rotating shaft, and a through processing groove is formed in the surface of the top plate; the number of the pressing plates is a plurality, and the pressing plates are arranged on the front side of the top plate in a staggered mode; the limiting slot is formed in the bottom end of the outer side of the top plate; the outer side of the top plate is provided with a limiting assembly, and the outer wall of the rotating shaft is provided with a driving assembly.

Preferably, the limiting assembly comprises: the device comprises a fixed seat, a first cylinder and a limiting bolt; the fixed seat is arranged at the top end of the workbench and positioned on the outer side of the first mounting seat; the first air cylinder is arranged on the outer side of the fixed seat, the telescopic end of the first air cylinder extends to the inner side of the fixed seat, and the first air cylinder can be connected with the operating valve through an air duct; the limiting bolt is arranged at the telescopic end of the first cylinder and can be inserted into the inner cavity of the limiting slot.

Preferably, the driving assembly includes: the limiting seat, the rack block, the second cylinder, the second mounting seat, the first gear and the second gear; the limiting seat is arranged at the bottom end of the rear opening of the workbench; the rack block is inserted into the inner side of the limiting seat along the front-back direction; the second cylinder is arranged at the bottom end of the rear opening of the workbench and is positioned on the front side of the limiting seat, the telescopic end of the second cylinder is fixedly connected with the rack block, and the second cylinder can be connected with the operating valve through an air duct; the second mounting seat is arranged at the top end of the rear opening of the workbench and is positioned above the rack block; the first gear is rotatably connected to the inner side of the second mounting seat through a pin shaft and is meshed with the rack block; and the second gear is in keyed connection with the outer wall of the rotating shaft and is meshed with the first gear.

Preferably, the pressing mechanism includes: the device comprises a base, a top block, a mounting rod, a first rotating seat, a pressing block, a connecting rod, a third air cylinder, a connecting seat, a mounting seat, a second rotating seat and a stop block; the base is arranged on the front side of the top end of the workbench; the top block is arranged on the rear side of the top end of the base; the number of the mounting rods is two, and one ends of the two mounting rods are rotatably connected to the front sides of the tops of the left side and the right side of the base through pin shafts; the first rotating seat is rotatably connected to the other ends of the inner sides of the left and right mounting rods through a pin shaft; the pressing block is arranged on the rear side of the bottom end of the first rotating seat and at a position corresponding to the top block; the number of the connecting rods is two, and one ends of the two connecting rods are respectively and rotatably connected to the bottom end of the front side of the first rotating seat through pin shafts; the third cylinder is rotatably connected to the front side of the base through a pin shaft in the vertical direction and can be connected with the operating valve through an air duct; the connecting seat is arranged at the telescopic end of the third cylinder; the mounting seat is mounted at the top end of the front side of the top block; the second rotating seat is V-shaped, the rear end of the second rotating seat is rotatably connected to the inner side of the mounting seat through a pin shaft, the front end of the second rotating seat is rotatably connected to the inner side of the connecting seat through a pin shaft, and the corner of the second rotating seat is rotatably connected with the inner sides of the other ends of the left connecting rod and the right connecting rod through a pin shaft; the stopper is disposed at a front side of the base, and the front side of the stopper may contact with a rear side of the second rotating base.

Compared with the prior art, the utility model has the beneficial effects that: this take battery case anchor clamps of hydraulic pressure upset:

1. the battery box is tightly jacked through the extension of the oil cylinder jacking device, the third air cylinder extends to push the connecting seat to move upwards, the connecting seat drives the second rotating seat to rotate by taking the connecting part of the connecting seat and the pin shaft of the mounting seat as a vertex, one end of the connecting rod is driven to move upwards, the first rotating seat is driven to rotate towards the rear side by taking the connecting part of the mounting rod and the pin shaft of the base as a vertex under the matching of the connecting rod, and the first rotating seat drives the pressing block and the jacking block to clamp the front end of the battery box to be fixed;

2. the second cylinder extends to enable the rack block to move towards the rear side in the inner cavity of the limiting seat, the first gear rotates under the action of the rack block, the second gear drives the rotating shaft to rotate under the action of the first gear, the rotating shaft drives the top plate to rotate towards the front side, so that the pressing plate is attached to and pressed against the top end of the battery box, the first cylinder extends to push the limiting bolt to move towards the inner side to be inserted into the inner cavity of the limiting slot at the corresponding position, and the top plate is fixed;

thereby can realize carrying out multi-direction ascending fixed simultaneously to the top around the battery case to carry out quick fixed to battery case processing department, the battery case work piece of being convenient for is dismantled simultaneously, improves the stability that the battery case work piece was fixed, and then improves the machining precision.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is an exploded view of the top canting mechanism of FIG. 1;

fig. 4 is an exploded view of the hold down mechanism of fig. 1.

In the figure: 1. the device comprises a workbench, 2, a top turnover mechanism, 21, a first mounting seat, 22, a rotating shaft, 23, a top plate, 24, a pressing plate, 25, a limiting slot, 26, a fixed seat, 27, a first air cylinder, 28, a limiting bolt, 29, a limiting seat, 210, a rack block, 211, a second air cylinder, 212, a second mounting seat, 213, a first gear, 214, a second gear, 3, a pressing mechanism, 31, a base, 32, a top block, 33, a mounting rod, 34, a first rotating seat, 35, a pressing block, 36, a connecting rod, 37, a third air cylinder, 38, a connecting seat, 39, a mounting seat, 310, a second rotating seat, 311, a stop block, 4, an operating valve, 5, an oil cylinder puller, 6, a workpiece ejector, 7 and a battery box.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a battery case clamp with hydraulic flipping, comprising: the device comprises a workbench 1, a top turnover mechanism 2, a pressing mechanism 3, an operating valve 4, an oil cylinder jacking device 5, a workpiece ejector 6 and a battery box 7; the number of the top turnover mechanisms 2 is two, and the two top turnover mechanisms 2 are respectively arranged at the left end and the right end of the rear side of the top end of the workbench 1; the number of the pressing mechanisms 3 is a plurality, and the plurality of pressing mechanisms 3 are arranged on the front side of the workbench 1 in a clearance mode; the operating valve 4 is arranged on the outer side of the workbench 1, the operating valve 4 is directly purchased, installed and used from the market according to the actual use requirement, and the operating valve 4 can be connected with an external air pump; the number of the oil cylinder ejectors 5 is a plurality, the oil cylinder ejectors 5 are respectively arranged on the left side and the right side of the top end of the workbench 1 and the front side of the top end of the workbench 1 in a clearance manner and are positioned at the clearance between two adjacent pressing mechanisms 3, the oil cylinder ejectors 5 are directly purchased, installed and used from the market according to actual use requirements, and the oil cylinder ejectors 5 tightly eject the battery box 7 through the extension of self telescopic ends; the number of the workpiece lifters 6 is a plurality, and the workpiece lifters 6 are respectively arranged at the opening at the top end of the workbench 1; the battery box 7 is detachably arranged on the upper surface of the workbench 1 and is positioned at the inner side of the plurality of oil cylinder ejectors 5.

Preferably, the top turnover mechanism 2 further comprises: the device comprises a first mounting seat 21, a rotating shaft 22, a top plate 23, a pressure plate 24 and a limiting slot 25; the first mounting seat 21 is arranged at the rear side of the top end of the workbench 1 along the left-right direction; the rotating shaft 22 is rotatably connected to the inner side of the first mounting seat 21 through a bearing in the left-right direction; the top plate 23 is arranged on the outer wall of the rotating shaft 22, and a through processing groove is formed in the surface of the top plate 23; the number of the pressing plates 24 is a plurality, the pressing plates 24 are arranged on the front side of the top plate 23 in a staggered mode, and the surfaces of the pressing plates 24 are made of fireproof silica gel materials so as to avoid damaging the battery box 7; the limiting slot 25 is formed in the bottom end of the outer side of the top plate 23; wherein, the outside of roof 23 is provided with spacing subassembly, and spacing subassembly includes: a fixed seat 26, a first air cylinder 27 and a limit bolt 28; the fixed seat 26 is arranged at the top end of the workbench 1 and is positioned at the outer side of the first installation seat 21; the first air cylinder 27 is arranged on the outer side of the fixed seat 26, the telescopic end of the first air cylinder 27 extends to the inner side of the fixed seat 26, the first air cylinder 27 can be connected with the operating valve 4 through an air guide pipe, the specific usage model of the first air cylinder 27 is directly purchased, installed and used from the market according to the actual usage requirement, and the first air cylinder 27 can be controlled by the operating valve 4 to extend and shorten; the limiting bolt 28 is arranged at the telescopic end of the first air cylinder 27, and the limiting bolt 28 can be inserted into the inner cavity of the limiting slot 25; the outer wall of pivot 22 is provided with drive assembly, and drive assembly includes: the limiting seat 29, the rack block 210, the second cylinder 211, the second mounting seat 212, the first gear 213 and the second gear 214; the limiting seat 29 is arranged at the bottom end of the rear opening of the workbench 1; the rack block 210 is inserted into the inner side of the limiting seat 29 along the front-back direction; the second cylinder 211 is arranged at the bottom end of the rear opening of the workbench 1 and is positioned at the front side of the limiting seat 29, the telescopic end of the second cylinder 211 is fixedly connected with the rack block 210, the second cylinder 211 can be connected with the operating valve 4 through an air duct, the specific usage model of the second cylinder 211 is directly purchased, installed and used from the market according to the actual usage requirement, and the second cylinder 211 can be controlled by the operating valve 4 to extend and shorten; the second mounting seat 212 is arranged at the top end of the rear opening of the workbench 1 and above the rack block 210; the first gear 213 is rotatably connected to the inner side of the second mounting seat 212 through a pin shaft, the first gear 213 is engaged with the rack block 210, and the first gear 213 can rotate under the action of the rack block 210; the second gear 214 is keyed on the outer wall of the rotating shaft 22, the second gear 214 is meshed with the first gear 213, and the second gear 214 can drive the rotating shaft 22 to rotate under the action of the first gear 213.

Preferably, the pressing mechanism 3 further includes: the device comprises a base 31, a top block 32, a mounting rod 33, a first rotating seat 34, a pressing block 35, a connecting rod 36, a third air cylinder 37, a connecting seat 38, a mounting seat 39, a second rotating seat 310 and a stop block 311; the base 31 is arranged on the front side of the top end of the workbench 1; the top block 32 is arranged at the rear side of the top end of the base 31; the number of the mounting rods 33 is two, and one ends of the two mounting rods 33 are rotatably connected to the front sides of the tops of the left side and the right side of the base 31 through pin shafts; the first rotating seat 34 is rotatably connected to the other ends of the inner sides of the left and right mounting rods 33 through a pin shaft, and the mounting rod 33 can rotate towards the rear side by taking the pin shaft rotating connection position with the base 31 as a vertex; the pressing block 35 is arranged at the rear side of the bottom end of the first rotating seat 34 and at the position corresponding to the top block 32; the number of the connecting rods 36 is two, and one end of each of the two connecting rods 36 is rotatably connected to the bottom end of the front side of the first rotating seat 34 through a pin shaft; the third cylinder 37 is rotatably connected to the front side of the base 31 through a pin shaft in the vertical direction, the third cylinder 37 can be connected with the operating valve 4 through an air duct, the specific usage model of the third cylinder 37 is directly purchased, installed and used from the market according to the actual usage requirement, and the third cylinder 37 can be controlled by the operating valve 4 to extend and shorten; the connecting base 38 is arranged at the telescopic end of the third cylinder 37; the mounting seat 39 is mounted on the front top end of the top block 32; the second rotating seat 310 is in a V shape, the rear end of the second rotating seat 310 is rotatably connected to the inner side of the mounting seat 39 through a pin shaft, the front end of the second rotating seat 310 is rotatably connected to the inner side of the connecting seat 38 through a pin shaft, the corner of the second rotating seat 310 is rotatably connected to the inner sides of the other ends of the left and right connecting rods 36 through a pin shaft, and the joint of the second rotating seat 310 and the mounting seat 39 through a pin shaft can rotate as a vertex; the stopper 311 is disposed at the front side of the base 31, and the front side of the stopper 311 may contact the rear side of the second rotary holder 310 to limit the second rotary holder 310.

All the electrical components in the present application can be connected with an external adaptive power supply through a wire, and an adaptive external controller should be selected to connect according to specific actual use conditions to meet the control requirements of all the electrical components, and the specific connection mode and the control sequence thereof should be referred to in the following working principle that the electrical components are electrically connected in sequence, the detailed connection means thereof is a known technology in the art and is not described, and the following main description of the working principle and the process specifically works as follows.

1. The operator places the battery box at the top end of the workbench 1 and controls the operating valve 4 to start the oil cylinder puller 5, so as to cause the oil cylinder puller 5 to extend to push the battery box 7 tightly, and controls the operation valve 4 to synchronously start a plurality of third air cylinders 37 in the pressing mechanism 3, the third air cylinders 37 push the connecting seats 38 to move upwards through self extension, and the connecting base 38 drives the second rotating base 310 to rotate with the pin joint with the mounting base 39 as the vertex and contact with the front side of the stopper 311, so that the second rotating base 310 drives one end of the connecting rod 36 to move upwards, and then the first rotating base 34 is pushed by the connection rod 36 to be matched with the installation rod 33, the first rotating base 34 rotates towards the rear side by taking the pin shaft rotating connection position of the installation rod 33 and the base 31 as a vertex, further, the first rotating base 34 drives the pressing block 35 and the top block 32 to clamp and fix the front end of the battery box 7;

2. the operator controls the operation valve 4 to start the second cylinder 211 and the first cylinder 27 in sequence, the second cylinder 211 extends by itself, and then under the limiting action of the limiting seat 29, the rack block 210 moves to the rear side in the inner cavity of the limiting seat 29, because the first gear 213 is meshed with the rack block 210, the first gear 213 rotates under the action of the rack block 210, and because the second gear 214 is meshed with the first gear 213, the second gear 214 drives the rotating shaft 22 to rotate under the action of the first gear 213, and the rotating shaft 22 drives the top plate 23 to rotate to the front side, so that the pressing plate 24 is attached to and tightly pressed against the top end of the battery box, the first cylinder 27 pushes the limiting bolt 28 to move to the inner side through self extension to be inserted into the inner cavity of the limiting slot 25 at the corresponding position, so as to fix the top plate 23, the external welding processing device can perform welding processing along the processing slot of the top plate 23, and the workpiece ejector 6 extends to push the battery box 7 after the processing is finished, returning the material;

In the description of the present invention, it is to be understood that the terms "top end", "bottom end", "one end", "front side", "rear side", "the other end", "up", "down", "inside", "outside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated; also, unless expressly stated or limited otherwise, the terms "mounted," "screwed," "plugged," "interference fit," "disposed," and the like are to be construed broadly, e.g., as a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a take battery case anchor clamps of hydraulic pressure upset which characterized in that includes:

a table (1);

the number of the top turnover mechanisms (2) is two, and the two top turnover mechanisms (2) are respectively arranged at the left end and the right end of the rear side of the top end of the workbench (1);

the number of the pressing mechanisms (3) is a plurality, and the pressing mechanisms (3) are arranged on the front side of the workbench (1) in a clearance mode;

an operation valve (4) provided outside the table (1);

the number of the oil cylinder jacking devices (5) is a plurality, and the oil cylinder jacking devices (5) are respectively arranged on the left side and the right side of the top end of the workbench (1) and the front side of the top end of the workbench (1) in a clearance manner and are positioned at the clearance between two adjacent pressing mechanisms (3);

the number of the workpiece lifters (6) is a plurality, and the workpiece lifters (6) are respectively arranged at the opening at the top end of the workbench (1);

and the battery box (7) is detachably placed on the upper surface of the workbench (1) and is positioned on the inner sides of the plurality of oil cylinder jacking devices (5).

2. The battery box clamp with hydraulic overturn function of claim 1, which is characterized in that: the top turnover mechanism (2) comprises:

a first mounting base (21) arranged at the rear side of the top end of the workbench (1) along the left-right direction;

a rotating shaft (22) rotatably connected to the inner side of the first mounting seat (21) through a bearing in the left-right direction;

the top plate (23) is installed on the outer wall of the rotating shaft (22), and a through processing groove is formed in the surface of the top plate (23);

the number of the pressing plates (24) is a plurality, and the pressing plates (24) are arranged on the front side of the top plate (23) in a staggered mode;

the limiting slot (25) is formed in the bottom end of the outer side of the top plate (23);

the outer side of the top plate (23) is provided with a limiting assembly, and the outer wall of the rotating shaft (22) is provided with a driving assembly.

3. The battery box clamp with hydraulic overturn function of claim 2, which is characterized in that: the spacing subassembly includes:

the fixed seat (26) is arranged at the top end of the workbench (1) and is positioned on the outer side of the first mounting seat (21);

the first air cylinder (27) is arranged on the outer side of the fixed seat (26), the telescopic end of the first air cylinder (27) extends to the inner side of the fixed seat (26), and the first air cylinder (27) can be connected with the operating valve (4) through an air guide pipe;

and the limiting bolt (28) is arranged at the telescopic end of the first air cylinder (27), and the limiting bolt (28) can be inserted into the inner cavity of the limiting slot (25).

4. A battery pack holder as claimed in claim 3 with hydraulic flipping, wherein: the drive assembly includes:

the limiting seat (29) is arranged at the bottom end of the rear side opening of the workbench (1);

the rack block (210) is inserted into the inner side of the limiting seat (29) along the front-back direction;

the second air cylinder (211) is arranged at the bottom end of the rear side opening of the workbench (1) and is positioned on the front side of the limiting seat (29), the telescopic end of the second air cylinder (211) is fixedly connected with the rack block (210), and the second air cylinder (211) can be connected with the operating valve (4) through an air guide pipe;

the second mounting seat (212) is arranged at the top end of the opening of the rear side of the workbench (1) and is positioned above the rack block (210);

the first gear (213) is rotatably connected to the inner side of the second mounting seat (212) through a pin shaft, and the first gear (213) is meshed with the rack block (210);

a second gear (214) which is keyed on the outer wall of the rotating shaft (22), wherein the second gear (214) is meshed with the first gear (213).

5. The battery box clamp with hydraulic overturn function of claim 4, which is characterized in that: the pressing mechanism (3) includes:

a base (31) mounted on the front side of the top end of the workbench (1);

a top block (32) arranged at the rear side of the top end of the base (31);

the number of the mounting rods (33) is two, and one end of each of the two mounting rods (33) is rotatably connected to the front side of the top of the left side and the right side of the base (31) through a pin shaft;

the first rotating seat (34) is rotatably connected to the other ends of the inner sides of the left and right mounting rods (33) through a pin shaft;

the pressing block (35) is arranged on the rear side of the bottom end of the first rotating seat (34) and corresponds to the top block (32);

the number of the connecting rods (36) is two, and one ends of the two connecting rods (36) are respectively and rotatably connected to the bottom end of the front side of the first rotating seat (34) through pin shafts;

the third air cylinder (37) is rotatably connected to the front side of the base (31) through a pin shaft in the vertical direction, and the third air cylinder (37) can be connected with the operating valve (4) through an air guide pipe;

the connecting seat (38) is arranged at the telescopic end of the third cylinder (37);

a mounting seat (39) mounted on the front top end of the top block (32);

the second rotating seat (310) is V-shaped, the rear end of the second rotating seat (310) is rotatably connected to the inner side of the mounting seat (39) through a pin shaft, the front end of the second rotating seat (310) is rotatably connected to the inner side of the connecting seat (38) through a pin shaft, and the corners of the second rotating seat (310) are rotatably connected with the inner sides of the other ends of the left connecting rod (36) and the right connecting rod (36) through pin shafts;

and a stopper (311) disposed at a front side of the base (31), the front side of the stopper (311) being contactable with a rear side of the second rotating base (310).