Rear row seat adjusting lock welding positioning clamp stable in welding

Abstract

The utility model discloses a stable-welding rear-row seat adjusting lock welding positioning clamp, belongs to the technical field of welding positioning clamps, and solves the problems that in the prior art, the effect of clamping assembly parts in place cannot be guaranteed, the working efficiency is low, welding slag is easily adhered to an adjusting guide rail, and subsequent assembly is influenced. Comprising a clamp bottom plate, a rear end supporting assembly, a middle supporting assembly and a front end supporting assembly are sequentially arranged on the clamp bottom plate, an adjusting guide rail clamping mechanism is arranged on the side portion of the rear end supporting assembly, a fixed hook pressing mechanism is arranged on the side portion of the front end supporting assembly, and a connecting plate jacking air cylinder is arranged in front of the front end supporting assembly. A connecting plate jacking pressing head is arranged at the telescopic end of the connecting plate jacking air cylinder. The device is reasonable in design, compact in structure, accurate in welding, assembling and positioning, capable of avoiding the large-batch size problem of products, capable of improving the production takt, capable of effectively preventing welding slag from adhering to the adjusting guide rail to affect follow-up assembling, high in use reliability and high in practicability.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding positioning fixtures, and in particular relates to a welding positioning fixture for a rear seat adjustment lock with stable welding. Background Art

[0002] The rear seat adjustment lock is a key component of the rear seat adjustment action, and its assembly and welding dimensions directly affect the seat adjustment position and the comfort of the passengers. At present, manual clamping fixtures are generally used during the assembly and welding of the seat adjustment locks. The clamping effect of each assembly component cannot be guaranteed. Once the manual clamping is not in place, it will cause dimensional problems in large quantities of products. Moreover, the manual clamping work efficiency is low, which has a certain impact on the production rhythm. In addition, the adjustment rail of the rear seat adjustment lock serves as the working surface of the adjustment lock to adjust the seat. During the automatic welding process, it is very easy to stick welding slag, which will cause the working surface of the adjustment rail to be uneven, affecting the subsequent assembly. Therefore, it is necessary to improve the welding positioning fixture of the rear seat adjustment lock in the prior art. Utility Model Content

[0003] The utility model aims to solve the above-mentioned problems and provides a welding assembly positioning fixture with accurate positioning, which can avoid dimensional problems of large quantities of products, improve the production rhythm, and effectively prevent welding slag from adhering to the adjustment guide rail of the adjustment lock and affecting subsequent assembly. The utility model has high reliability and strong practicality, and is stable in welding the rear seat adjustment lock welding positioning fixture.

[0004] The technical solution adopted by the utility model is: the welded stable rear seat adjustment lock welding positioning fixture includes a fixture bottom plate, characterized in that: a rear end support assembly, a middle support assembly and a front end support assembly are sequentially arranged on the fixture bottom plate, the two ends of the adjustment lock adjustment guide rail are respectively arranged on the rear end support assembly and the middle support assembly, and the adjustment lock connecting plate and the adjustment lock fixing hook are respectively arranged on the front end support assembly; an adjustment guide rail clamping mechanism is arranged on the side of the rear end support assembly, a fixed hook clamping mechanism is arranged on the side of the front end support assembly, a horizontally arranged connecting plate tightening cylinder is arranged in front of the front end support assembly, the connecting plate tightening cylinder is connected to the fixture bottom plate through a tightening cylinder connecting seat, and a connecting plate tightening pressure head is arranged at the telescopic end of the connecting plate tightening cylinder; a starting button for controlling the action of each cylinder is also arranged on the fixture bottom plate.

[0005] The rear end support assembly includes a rear end support seat connected to the fixture bottom plate, a contact pad is arranged at the upper end of the rear end support seat, and rear end side blocks are arranged on the left and right sides of the contact pad respectively. The rear end of the adjusting lock adjusting guide rail is placed on the contact pad at the upper end of the rear end support seat, and the rear end side blocks on both sides of the contact pad are used for lateral positioning.

[0006] The middle support assembly includes a middle support seat connected to the fixture bottom plate, a contact pad is arranged at the upper end of the middle support seat, and middle side blocks are arranged on the left and right sides of the contact pad, so that the front end of the adjustment lock adjustment guide rail is placed on the contact pad at the upper end of the middle support seat, and the middle side blocks on both sides of the contact pad are used for lateral positioning.

[0007] An adjusting rail welding protective cover is rotatably arranged between the rear support assembly and the middle support assembly, and the adjusting rail welding protective cover includes a protective cover hinge seat arranged vertically on the bottom plate of the fixture, and a protective cover connecting block is rotatably arranged on the upper end of the protective cover hinge seat, one end of the protective cover connecting block is hinged to the protective cover hinge seat, and the other end of the protective cover connecting block is fixedly arranged with a protective cover body. The reciprocating swing of the protective cover body around the hinge shaft at the upper end of the protective cover hinge seat is used to shield and protect the adjusting rail of the adjusting lock placed between the rear support assembly and the middle support assembly, thereby preventing welding slag from sticking to the adjusting rail of the adjusting lock during welding, and effectively protecting the working surface of the adjusting rail.

[0008] The adjusting guide rail clamping mechanism comprises a guide rail clamping cylinder connection seat, on which an adjusting guide rail clamping cylinder arranged obliquely is arranged, and the telescopic end of the adjusting guide rail clamping cylinder is provided with an adjusting guide rail clamping pressure head for clamping the adjusting lock adjusting guide rail. By controlling the telescopic movement of the adjusting guide rail clamping cylinder, the adjusting guide rail clamping pressure head is driven to clamp the adjusting lock adjusting guide rail placed between the rear support assembly and the middle support assembly; it can be understood that when the adjusting guide rail welding protective cover is lowered and covers the adjusting guide rail, the adjusting guide rail clamping pressure head is pressed on the protective cover body.

[0009] The front end support assembly includes a front end support seat, a contact pad is provided at the upper end of the front end support seat, a fixed hook positioning boss is provided in the middle of the contact pad, two groups of connection plate side positioning blocks are provided at the upper end of the front end support seat and on the side facing the middle support assembly, and a connection plate lower support block is also provided below the two groups of connection plate side positioning blocks. The adjustment lock fixing hook is horizontally positioned and placed on the fixed hook positioning boss at the upper end of the front end support seat, and the adjustment lock connection plate is vertically positioned and placed between the two groups of connection plate side positioning blocks, and the adjustment lock connection plate is supported by the connection plate lower support block.

[0010] The connecting plate pressing head is a U-shaped structure, and the pressing head connection part at the rear end of the connecting plate pressing head is fixedly connected to the cylinder telescopic rod connection block provided at the telescopic end of the connecting plate pressing cylinder, and the front side of the pressing head connection part is respectively provided with an upper telescopic push rod and a lower telescopic push rod arranged at intervals, and the lower telescopic push rod passes through the lower push rod through hole provided in the middle of the fixing hook positioning boss, and the upper telescopic push rod is arranged in the upper push rod guide groove provided on the upper side of the fixing hook positioning boss; the front end of the upper telescopic push rod is also provided with a connecting plate holding block. The lower telescopic push rod and the upper telescopic push rod of the connecting plate pressing head are driven to reciprocate in the upper end of the front end support assembly, the lower push rod through hole in the middle of the fixing hook positioning boss, and the upper push rod guide groove on the upper side by utilizing the telescopic movement of the connecting plate pressing cylinder, so as to position and fix the adjusting lock connecting plate vertically arranged between the adjusting guide rail of the adjusting lock and the fixing hook of the adjusting lock, so as to facilitate the subsequent automatic welding.

[0011] The fixed hook clamping mechanism comprises a hook clamping cylinder connection seat, a hook clamping cylinder arranged vertically is arranged on the hook clamping cylinder connection seat, a swinging pressure rod is arranged at the telescopic end of the upper part of the hook clamping cylinder, one end of the swinging pressure rod is hinged to the telescopic end of the hook clamping cylinder, and the other end of the swinging pressure rod is provided with two groups of symmetrically arranged L-shaped hook clamping blocks, and an articulated connecting rod is also arranged between the rear part of the swinging pressure rod and the cylinder body of the hook clamping cylinder. Through the extension and contraction of the hook clamping cylinder, the swinging pressure rod is driven to swing back and forth around the hinge shaft of the telescopic end of the hook clamping cylinder and under the guidance of the articulated connecting rod, and then the two groups of symmetrically arranged L-shaped hook clamping blocks are used to press and fix the adjustment lock fixed hook positioned on the upper part of the front end support assembly.

[0012] The beneficial effects of the utility model are as follows: since the utility model adopts a clamp base plate on which a rear end support assembly, a middle support assembly and a front end support assembly are sequentially arranged, the two ends of the adjusting lock adjusting rail are respectively arranged on the rear end support assembly and the middle support assembly, and the adjusting lock connecting plate and the adjusting lock fixing hook are respectively arranged on the front end support assembly; an adjusting rail clamping mechanism is arranged on the side of the rear end support assembly, a fixing hook pressing mechanism is arranged on the side of the front end support assembly, a connecting plate tightening cylinder is arranged in front of the front end support assembly, and a connecting plate tightening pressure head is arranged at the telescopic end of the connecting plate tightening cylinder, so it has a reasonable design, compact structure, accurate welding assembly positioning, can avoid large-scale size problems of products, and at the same time, can improve production rhythm, high production efficiency, and can effectively prevent welding slag from sticking to the adjusting lock adjusting rail and affecting subsequent assembly, with high reliability and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 yes Figure 1 A-direction view.

[0015] Figure 3 yes Figure 1 A partial structural schematic diagram of the rear end support assembly, middle support assembly and adjustment guide rail welding protection cover.

[0016] Figure 4 yes Figure 1 A partial structural schematic diagram of the front end support assembly, the connecting plate tightening head and the connecting plate tightening cylinder.

[0017] Figure 5 yes Figure 4 A structural schematic diagram of the front end support assembly in FIG.

[0018] Figure 6 yes Figure 4 A schematic diagram of a connection structure between a connecting plate tightening pressure head and a connecting plate tightening cylinder.

[0019] Figure 7 yes Figure 1 A structural schematic diagram of a fixed hook clamping mechanism in FIG.

[0020] Description of the serial numbers in the figure: 1 fixture base plate, 2 rear end support assembly, 3 middle support assembly, 4 front end support assembly, 5 adjustment guide rail welding protection cover, 6 adjustment guide rail clamping pressure head, 7 adjustment guide rail clamping cylinder, 8 guide rail clamping cylinder connecting seat, 9 fixed hook clamping mechanism, 10 connecting plate top pressure head, 11 connecting plate top cylinder, 12 start button, 13 adjustment lock adjustment guide rail, 14 adjustment lock connecting plate, 15 adjustment lock fixed hook, 16 rear end support seat, 17 rear end side block, 18 middle support seat, 19 middle side block , 20 protective cover hinge seat, 21 protective cover connecting block, 22 protective cover body, 23 connecting plate side positioning block, 24 fixed hook positioning boss, 25 front end support seat, 26 connecting plate lower support block, 27 lower push rod through hole, 28 upper push rod guide groove, 29 clamping cylinder connecting seat, 30 cylinder telescopic rod connecting block, 31 clamping head connecting part, 32 lower telescopic push rod, 33 upper telescopic push rod, 34 connecting plate holding pressure block, 35 hook clamping cylinder connecting seat, 36 hook clamping cylinder, 37 swing pressure rod, 38 hinged connecting rod, 39 L-shaped hook clamping block. DETAILED DESCRIPTION

[0021] according to Figures 1 to 7The specific structure of the utility model is described in detail. The welding and stabilizing rear seat adjustment lock welding and positioning fixture comprises a fixture bottom plate 1, on which a rear end support assembly 2, a middle support assembly 3 and a front end support assembly 4 are sequentially arranged, and both ends of the adjustment lock adjustment guide rail 13 to be welded are respectively arranged on the rear end support assembly 2 and the middle support assembly 3, and the adjustment lock connecting plate 14 to be welded and the adjustment lock fixing hook 15 are respectively arranged on the front end support assembly 4.

[0022] The rear end support assembly 2 includes a rear end support seat 16 connected to the fixture bottom plate 1, a contact pad is provided at the upper end of the rear end support seat 16, and rear end side blocks 17 are provided on the left and right sides of the contact pad respectively; the rear end of the adjustment lock adjustment rail 13 is aligned and placed on the contact pad at the upper end of the rear end support seat 16, and the rear end side blocks 17 on both sides of the contact pad are used for lateral positioning. At the same time, the middle support assembly 3 includes a middle support seat 18 connected to the fixture bottom plate 1, a contact pad is provided at the upper end of the middle support seat 18, and middle side blocks 19 are provided on the left and right sides of the contact pad respectively; the front end of the adjustment lock adjustment rail 13 is aligned and placed on the contact pad at the upper end of the middle support seat 18, and the middle side blocks 19 on both sides of the contact pad are used for lateral positioning.

[0023] In addition, an adjusting rail welding protective cover 5 is rotatably provided between the rear end support assembly 2 and the middle support assembly 3. The adjusting rail welding protective cover 5 includes a protective cover hinge seat 20 vertically arranged on the fixture bottom plate 1, and a protective cover connecting block 21 is rotatably provided on the upper end of the protective cover hinge seat 20, one end of the protective cover connecting block 21 is hinged to the protective cover hinge seat 20, and a protective cover body 22 is fixedly provided on the other end of the protective cover connecting block 21; according to specific use requirements, the protective cover body 22 can be made of copper. Thus, the reciprocating swing of the protective cover body 22 around the hinge shaft at the upper end of the protective cover hinge seat 20 is utilized to shield and protect the adjusting lock adjusting rail 13 placed between the rear end support assembly 2 and the middle support assembly 3, so as to prevent welding slag from adhering to the adjusting lock adjusting rail 13 during the welding process, and effectively protect the working surface of the adjusting rail.

[0024] The front end support assembly 4 includes a front end support seat 25, a contact pad is provided at the upper end of the front end support seat 25, a fixed hook positioning boss 24 is provided in the middle of the contact pad, and two groups of connecting plate side positioning blocks 23 are provided at the upper end of the front end support seat 25 and on the side facing the middle support assembly 3, and a connecting plate lower support block 26 is also provided below the two groups of connecting plate side positioning blocks 23, so as to horizontally position the adjustment lock fixing hook 15 on the fixed hook positioning boss 24 at the upper end of the front end support seat 25, and vertically position the adjustment lock connecting plate 14 between the two groups of connecting plate side positioning blocks 23, and support the adjustment lock connecting plate 14 through the connecting plate lower support block 26.

[0025] An adjusting guide rail clamping mechanism is arranged on the side of the rear end support assembly 2, and the adjusting guide rail clamping mechanism includes a guide rail clamping cylinder connecting seat 8, and an obliquely arranged adjusting guide rail clamping cylinder 7 is arranged on the guide rail clamping cylinder connecting seat 8, and an adjusting guide rail clamping head 6 for clamping the adjusting lock adjusting guide rail 13 is arranged at the telescopic end of the adjusting guide rail clamping cylinder 7; and then, by controlling the telescopic movement of the adjusting guide rail clamping cylinder 7, the adjusting guide rail clamping head 6 is driven to press and fix the adjusting lock adjusting guide rail 13 placed between the rear end support assembly 2 and the middle support assembly 3; it can be understood that when the adjusting guide rail welding protective cover 5 swings down and covers the adjusting guide rail, the adjusting guide rail clamping head 6 is pressed on the protective cover body 22.

[0026] A fixed hook clamping mechanism 9 is provided at the side of the front end support assembly 4. The fixed hook clamping mechanism 9 includes a hook clamping cylinder connection seat 35. A vertically arranged hook clamping cylinder 36 is provided on the hook clamping cylinder connection seat 35. A swinging pressure rod 37 is provided at the telescopic end of the upper part of the hook clamping cylinder 36. One end of the swinging pressure rod 37 is hinged to the telescopic end of the hook clamping cylinder 36. Two groups of symmetrically arranged L-shaped hook clamping blocks 39 are provided at the other end of the swinging pressure rod 37. In addition, a hinged connecting rod 38 is also provided between the rear part of the swinging pressure rod 37 and the cylinder body of the hook clamping cylinder 36. Thus, the swinging pressure rod 37 is driven to swing back and forth around the hinge axis of the telescopic end of the hook clamping cylinder 36 and under the guidance of the hinged connecting rod 38 by the extension and contraction of the hook clamping cylinder 36, so as to use the two groups of symmetrically arranged L-shaped hook clamping blocks 39 to press and fix the adjustment lock fixed hook 15 positioned at the upper part of the front end support assembly 4.

[0027] In front of the front-end support assembly 4, there is also a horizontally arranged connecting plate tightening cylinder 11, which is connected to the clamp base plate 1 through a tightening cylinder connecting seat 29, and a connecting plate tightening pressure head 10 is provided at the telescopic end of the connecting plate tightening cylinder 11; a start button 12 for controlling the action of each cylinder is provided on the clamp base plate 1. The connecting plate tightening head 10 is a U-shaped structure. The tightening head connecting part 31 at the rear end of the connecting plate tightening head 10 is fixedly connected to the cylinder telescopic rod connecting block 30 arranged at the telescopic end of the connecting plate tightening cylinder 11. The front side of the tightening head connecting part 31 is respectively provided with an upper telescopic push rod 33 and a lower telescopic push rod 32 arranged at intervals; and the lower telescopic push rod 32 passes through the lower push rod through hole 27 set in the middle part of the fixed hook positioning boss 24, and the upper telescopic push rod 33 is arranged in the upper push rod guide groove 28 set on the upper side of the fixed hook positioning boss 24; the front end of the upper telescopic push rod 33 is also provided with a connecting plate holding block 34. Thus, the extension and retraction of the connecting plate tightening cylinder 11 is utilized to drive the lower telescopic push rod 32 and the upper telescopic push rod 33 of the connecting plate tightening pressure head 10 to move back and forth in the lower push rod through hole 27 in the middle of the fixed hook positioning boss 24 at the upper end of the front end support assembly 4 and the upper push rod guide groove 28 on the upper side, so as to position and fix the adjustment lock connecting plate 14 vertically arranged between the adjustment lock adjustment guide rail 13 and the adjustment lock fixing hook 15, so as to facilitate subsequent automatic welding.

[0028] When the welding and stabilizing rear seat adjustment lock welding and positioning fixture is used, first, the rear end and front end of the adjustment lock adjustment rail 13 are aligned and placed on the rear support assembly 2 and the middle support assembly 3 respectively; then, the adjustment lock fixing hook 15 is horizontally and positioned on the fixing hook positioning boss 24 at the upper end of the front support seat 25, and then the adjustment lock connecting plate 14 is vertically and positioned between the two groups of connecting plate side positioning blocks 23, and the adjustment lock connecting plate 14 is supported by the connecting plate lower support block 26. Then, the adjustment guide rail welding protective cover 5 is pulled to make the protective cover body 22 cover the adjustment lock adjustment rail 13, so as to prevent welding slag from adhering to the adjustment lock adjustment rail 13 during the welding process and protect the working surface of the adjustment rail. After the adjustment lock guide rail 13, the adjustment lock fixing hook 15 and the adjustment lock connecting plate 14 are placed in place, the start button 12 is pressed, the connecting plate tightening cylinder 11 is extended, and the connecting plate tightening head 10 is pushed forward to position and tighten the adjustment lock connecting plate 14 vertically arranged between the adjustment lock guide rail 13 and the adjustment lock fixing hook 15. After the adjustment lock connecting plate 14 is tightened in place, the hook tightening cylinder 36 is driven to extend, so as to use the two groups of L-shaped hook tightening blocks 39 at the front end of the swing pressure rod 37 to tighten the adjustment lock fixing hook 15 positioned on the upper part of the front support assembly 4; at the same time, the adjustment guide rail clamping cylinder 7 is extended to drive the adjustment guide rail clamping head 6 to tighten the adjustment guide rail welding protective cover 5 and the adjustment lock adjustment guide rail 13 inside it. After all the assembled parts are positioned and clamped, subsequent automatic welding is carried out.

Claims

1. A welding and stabilizing rear seat adjustment lock welding and positioning fixture, comprising a fixture base plate (1), characterized in that: The clamp base plate (1) is provided with a rear end support assembly (2), a middle support assembly (3) and a front end support assembly (4) in sequence; the two ends of the adjustment lock adjustment rail (13) are arranged on the rear end support assembly (2) and the middle support assembly (3), respectively; and the adjustment lock connecting plate (14) and the adjustment lock fixing hook (15) are arranged on the front end support assembly (4), respectively; the side of the rear end support assembly (2) is provided with an adjustment rail clamping mechanism; the side of the front end support assembly (4) is provided with a fixing hook pressing mechanism (9); the front end support assembly (4) is provided with a horizontally arranged connecting plate tightening cylinder (11); the connecting plate tightening cylinder (11) is connected to the clamp base plate (1) through a tightening cylinder connecting seat (29); the telescopic end of the connecting plate tightening cylinder (11) is provided with a connecting plate tightening pressure head (10); the clamp base plate (1) is also provided with a start button (12) for controlling the action of each cylinder.

2. The welding and positioning fixture for welding and stabilizing rear seat adjustment locks according to claim 1 is characterized in that: The rear end support assembly (2) comprises a rear end support seat (16) connected to the fixture bottom plate (1), a contact pad is provided at the upper end of the rear end support seat (16), and rear end side stoppers (17) are respectively provided on the left and right sides of the contact pad.

3. The welding and positioning fixture for welding and stabilizing rear seat adjustment locks according to claim 1 is characterized in that: The middle support assembly (3) comprises a middle support seat (18) connected to the fixture bottom plate (1), a contact pad is arranged at the upper end of the middle support seat (18), and middle side stoppers (19) are arranged on the left and right sides of the contact pad respectively.

4. The welding and positioning fixture for welding and stabilizing rear seat adjustment locks according to claim 1, characterized in that: An adjustable guide rail welding protective cover (5) is rotatably arranged between the rear end support assembly (2) and the middle support assembly (3), the adjustable guide rail welding protective cover (5) comprising a protective cover hinge seat (20) vertically arranged on the fixture bottom plate (1), a protective cover connecting block (21) is rotatably arranged at the upper end of the protective cover hinge seat (20), one end of the protective cover connecting block (21) is hinged to the protective cover hinge seat (20), and the other end of the protective cover connecting block (21) is fixedly provided with a protective cover body (22).

5. The welding and positioning fixture for welding and stabilizing rear seat adjustment locks according to claim 1 is characterized in that: The adjusting guide rail clamping mechanism comprises a guide rail clamping cylinder connection seat (8), an adjusting guide rail clamping cylinder (7) arranged obliquely is arranged on the guide rail clamping cylinder connection seat (8), and an adjusting guide rail clamping pressure head (6) for pressing the adjusting lock adjusting guide rail (13) is arranged at the telescopic end of the adjusting guide rail clamping cylinder (7).

6. The welding and positioning fixture for welding and stabilizing rear seat adjustment locks according to claim 1, characterized in that: The front end support assembly (4) comprises a front end support seat (25), a contact pad is arranged at the upper end of the front end support seat (25), a fixed hook positioning boss (24) is arranged in the middle of the contact pad, two groups of connecting plate side positioning blocks (23) are arranged at the upper end of the front end support seat (25) and on the side facing the middle support assembly (3), and a connecting plate lower support block (26) is also arranged below the two groups of connecting plate side positioning blocks (23).

7. The welding and positioning fixture for welding and stabilizing rear seat adjustment locks according to claim 6, characterized in that: The connecting plate tightening head (10) is of a U-shaped structure. The tightening head connection portion (31) at the rear end of the connecting plate tightening head (10) is fixedly connected to a cylinder telescopic rod connection block (30) provided at the telescopic end of the connecting plate tightening cylinder (11). An upper telescopic push rod (33) and a lower telescopic push rod (32) arranged at intervals are provided on the front side of the tightening head connection portion (31). The lower telescopic push rod (32) passes through a lower push rod through hole (27) provided in the middle of the fixed hook positioning boss (24). The upper telescopic push rod (33) is arranged in an upper push rod guide groove (28) provided on the upper side of the fixed hook positioning boss (24). A connecting plate holding block (34) is also provided at the front end of the upper telescopic push rod (33).

8. The welding and positioning fixture for welding and stabilizing rear seat adjustment locks according to claim 1, characterized in that: The fixed hook clamping mechanism (9) comprises a hook clamping cylinder connecting seat (35), a hook clamping cylinder (36) arranged vertically is arranged on the hook clamping cylinder connecting seat (35), a swinging pressure rod (37) is arranged at the telescopic end of the upper part of the hook clamping cylinder (36), one end of the swinging pressure rod (37) is hinged to the telescopic end of the hook clamping cylinder (36), and the other end of the swinging pressure rod (37) is provided with two groups of symmetrically arranged L-shaped hook clamping blocks (39), and a hinged connecting rod (38) is also arranged between the rear part of the swinging pressure rod (37) and the cylinder body of the hook clamping cylinder (36).

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