Vehicle door fixing tool

Abstract

The utility model relates to the technical field of vehicle auxiliary tools, in particular to a vehicle door fixing tool which comprises a vertical frame provided with four first direction adjusting devices. The bottom frame is transversely erected on one side of the vertical frame, and the two first direction adjusting devices below the vertical frame are connected with the two ends of the bottom frame correspondingly; the first traction assembly is arranged above the bottom frame, and any one of the first direction adjusting devices above the vertical frame is connected with the first traction assembly; the second traction assembly is arranged on the side, away from the first traction assembly, of the vertical frame, the second traction assembly comprises a first traction piece, a second direction adjusting device and a connecting piece which are sequentially connected, and the other first direction adjusting device above the vertical frame is connected with the first traction piece. The vehicle door fixing tool disclosed by the utility model can be adapted to vehicle doors of different vehicle types, and is high in universality.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle auxiliary tooling, in particular to a door fixing tooling. Background Art

[0002] At present, during the storage of vehicle doors in the vehicle production process and the disassembly and assembly of vehicle doors during vehicle maintenance, the doors need to be separately hung on a tooling rack. However, since the shapes, sizes, etc. of the doors of each vehicle model are different, the adjustable range of the existing door fixing tooling is limited and cannot adapt to the doors of all vehicle models.

[0003] Obviously, the existing technology still needs to be improved. Content of the Utility Model

[0004] In view of the deficiencies of the above-mentioned existing technology, the purpose of the utility model is to provide a door fixing tooling to solve the problem that the existing door fixing tooling cannot adapt to the doors of all vehicle models.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A door fixing tooling, comprising:

[0007] A vertical frame, on which four first azimuth adjusting devices are provided;

[0008] A bottom frame, which is horizontally arranged on one side of the vertical frame to support the bottom of the door, and two of the first azimuth adjusting devices below the vertical frame are respectively connected to both ends of the bottom frame;

[0009] A first traction assembly, which is arranged above the bottom frame, any one of the first azimuth adjusting devices above the vertical frame is connected to the first traction assembly, and the first traction assembly is connected to the hinge of the door;

[0010] A second traction assembly, which is arranged on the side of the vertical frame away from the first traction assembly. The second traction assembly includes a first traction member, a second azimuth adjusting device and a connecting member connected in sequence. The other first azimuth adjusting device above the vertical frame is connected to the first traction member, and the connecting member is connected to the back panel of the door;

[0011] The first traction member includes a first rod body and a second rod body. The first rod body is vertically disposed at one end of the second rod body relative to the second rod body. One end of the second rod body away from the first rod body is connected to any one of the first azimuth adjustment devices. The second azimuth adjustment device includes a first collar, a second collar, two locking mechanisms, a movable rod, an extension block, a swing member, and a fine adjustment mechanism. The central axes of the first collar and the second collar are perpendicular to each other, and the outer sides of the first collar and the second collar are connected to each other. The first collar is sleeved on the first rod body, and the movable rod passes through the second collar. One of the locking mechanisms connects the first collar and the first rod body, and the other locking mechanism connects the second collar and the movable rod. The extension block is disposed at one end of the movable rod away from the second collar. The swing member is hinged to the extension block. The fine adjustment mechanism is disposed on the swing member and is connected to the connecting member.

[0012] For a door fixing tooling as described above, each of the first azimuth adjustment devices respectively includes a chute, a slide bar, and a locking nut. The chute is arranged along the height direction of the vertical frame. The slide bar passes through the chute, and the slide bar and the second rod body are coaxially arranged. The slide bar is connected to one end of the second rod body away from the first rod body. The locking nut is threadedly connected to one end of the slide bar away from the second rod body. One end of the second azimuth adjustment device is sleeved on the first rod body.

[0013] For a door fixing tooling as described above, each of the locking mechanisms respectively includes a first screw hole, a first screw rod, and a knob. The first screw hole is disposed on the first collar or the second collar. The knob is disposed at one end of the first screw rod, and the other end of the first screw rod is threadedly connected to the first screw hole.

[0014] For a door fixing tooling as described above, the swing member includes a first plane and a second plane which are perpendicularly arranged. The first plane is hinged to the extension block. The fine adjustment mechanism includes a second screw hole, a second screw rod, two gaskets, and two fine adjustment nuts. The second screw hole is disposed on the second plane. The two gaskets are respectively disposed on both sides of the second plane. The two fine adjustment nuts respectively abut against one side of the two gaskets facing away from the second plane. The second screw rod sequentially passes through the two gaskets, the two fine adjustment nuts, and the second screw hole.

[0015] For a door fixing tooling as described above, the first traction assembly includes a second traction member, a cushion block, and a clamping rod. The second traction member has the same structure as the first traction member. Both ends of the second traction member are respectively connected to the cushion block and any one of the first azimuth adjustment devices. The clamping rod is disposed on the cushion block.

[0016] A door fixing tooling as described above, the vertical frame includes a base, two vertical rods, an inner skeleton, four reinforcing members and a pulley set. The pulley set is arranged on the bottom of the base. The two vertical rods are respectively arranged on both sides of the top of the base. Any two of the reinforcing members are respectively connected to both sides of any one of the vertical rods and the base. Both sides of the inner skeleton are respectively connected to the two vertical rods.

[0017] A door fixing tooling as described above, the inner skeleton includes a fixed cross bar, a movable cross bar, two first guide grooves, two first connection components, a scissor frame, four second guide grooves, four second connection components and a driving cylinder. The two ends of the fixed cross bar are respectively connected to the two vertical rods. The two first guide grooves are respectively arranged on the two vertical rods in one-to-one correspondence. The two first connection components are respectively arranged through the two first guide grooves in one-to-one correspondence. The two first connection components are respectively connected to both ends of the movable cross bar. Two of the second guide grooves are respectively arranged on the fixed cross bar and the movable cross bar. The four second connection components are respectively arranged through the four second guide grooves in one-to-one correspondence. The four second connection components are all connected to the scissor frame. The driving cylinder is arranged on the fixed cross bar, and the output end of the driving cylinder is connected to the scissor frame.

[0018] Beneficial effects:

[0019] A door fixing tooling disclosed by the present utility model includes a vertical frame, a bottom frame, a first traction component and a second traction component. Four first orientation adjusting devices are arranged on the vertical frame. The second traction component includes a first traction member, a second orientation adjusting device and a connecting member connected in sequence. For this embodiment, the first orientation adjusting device is for adjusting in the up-and-down direction, and the second orientation adjusting device is for adjusting in the front-and-back direction. Among them, the relative distances between the bottom frame, the first traction component and the second traction component can be adjusted through the four first orientation adjusting devices, that is, the height corresponding to the door. The other end of the first traction component is connected to the hinge position of the door. The front-and-back inclination position of the first traction member and the connecting member can be adjusted through the second orientation adjusting device. The connecting member is connected to the back panel of the door. The bottom frame supports the bottom of the door. A door fixing tooling disclosed by the present application can be adapted to the doors of different vehicle models, and has high versatility. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the door fixing tooling provided by the present utility model;

[0021] Figure 2 It is a schematic structural diagram of the door fixing tooling provided by the present utility model from another angle;

[0022] Figure 3 An exploded view of the door fixing tooling provided by the present utility model;

[0023] Figure 4 is Figure 3 an enlarged view of part A of;

[0024] Reference numerals: 1, vertical frame; 11, first azimuth adjustment device; 12, chute; 13, sliding rod; 14, locking nut; 15, base; 16, vertical rod; 17, inner skeleton; 171, fixed cross bar; 172, movable cross bar; 173, first guide groove; 174, first connection assembly; 175, scissors frame; 176, second guide groove; 177, second connection assembly; 178, driving cylinder; 18, reinforcement member; 19, pulley block; 2, chassis; 3, first traction assembly; 31, second traction member; 32, spacer block; 33, clamping rod; 4, second traction assembly; 41, first traction member; 411, first rod body; 412, second rod body; 42, second azimuth adjustment device; 44, first collar; 45, second collar; 46, locking mechanism; 461, first screw hole; 462, first screw; 463, knob; 47, movable rod; 48, extension block; 49, swing member; 491, first plane; 492, second plane; 40, fine adjustment mechanism; 401, second screw hole; 402, second screw; 403, gasket; 404, fine adjustment nut; 43, connecting member. Detailed implementation manners

[0025] The present utility model provides a door fixing tooling. To make the purpose, technical solution and effect of the present utility model clearer and more definite, the following takes examples with reference to the attached drawings and further elaborates on the present utility model in detail.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "top", etc. is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present utility model and simplifying the description, and should not be construed as a limitation to the present utility model; in addition, terms such as "installation" and "connection" should be understood in a broad sense. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] As Figures 1-4 shown, an embodiment of the present application proposes a door fixing tooling, including:

[0028] A vertical frame 1, on which four first azimuth adjustment devices 11 are provided;

[0029] A chassis 2, which is horizontally mounted on one side of the vertical frame 1 to support the bottom of the door, and the two first azimuth adjustment devices 11 below the vertical frame 1 are respectively connected to both ends of the chassis 2;

[0030] The first traction assembly 3 is disposed above the chassis 2. Any one of the first orientation adjustment devices 11 above the vertical frame 1 is connected to the first traction assembly 3, and the first traction assembly 3 is hinged to the vehicle door.

[0031] The second traction assembly 4 is disposed on a side of the vertical frame 1 away from the first traction assembly 3. The second traction assembly 4 includes a first traction member 41, a second orientation adjustment device 42, and a connecting member 43 that are connected in sequence. The other first orientation adjustment device 11 above the vertical frame 1 is connected to the first traction member 41, and the connecting member 43 is connected to the back panel of the vehicle door.

[0032] The first traction member 41 includes a first rod body 411 and a second rod body 412. The first rod body 411 is disposed perpendicular to the second rod body 412 at one end of the second rod body 412. One end of the second rod body 412 away from the first rod body 411 is connected to any one of the first orientation adjustment devices 11. The second orientation adjustment device 42 includes a first collar 44, a second collar 45, two locking mechanisms 46, a movable rod 47, an extension block 48, a swinging member 49, and a fine adjustment mechanism 40. The central axes of the first collar 44 and the second collar 45 are perpendicular to each other. The outer sides of the first collar 44 and the second collar 45 are connected to each other. The first collar 44 is sleeved on the first rod body 411. The movable rod 47 passes through the second collar 45. One of the locking mechanisms 46 connects the first collar 44 and the first rod body 411, and the other locking mechanism 46 connects the second collar 45 and the movable rod 47. The extension block 48 is disposed at one end of the movable rod 47 away from the second collar 45. The swinging member 49 is hinged to the extension block 48. The fine adjustment mechanism 40 is disposed on the swinging member 49 and is connected to the connecting member 43.

[0033] A door fixing tooling disclosed by the utility model comprises a vertical frame 1, a bottom frame 2, a first traction assembly 3 and a second traction assembly 4. Four first azimuth adjusting devices 11 are arranged on the vertical frame 1. The second traction assembly 4 comprises a first traction piece 41, a second azimuth adjusting device 42 and a connecting piece 43 which are connected in sequence. In this embodiment, the first azimuth adjusting device 11 is adjusted in the up-and-down direction, and the second azimuth adjusting device 42 is adjusted in the front-and-rear direction. Among them, the relative distances among the bottom frame 2, the first traction assembly 3 and the second traction assembly can be adjusted by the four first azimuth adjusting devices 11, that is, the height corresponding to the door. The other end of the first traction assembly 3 is connected to the hinge position of the door. The front-and-rear inclination positions of the first traction piece 41 and the connecting piece 43 can be adjusted by the second azimuth adjusting device 42. The connecting piece 43 is connected to the back plate of the door. The bottom frame 2 supports the bottom of the door. A door fixing tooling disclosed by the present application can be adapted to doors of different vehicle models and has high versatility.

[0034] Each of the first azimuth adjusting devices 11 respectively comprises a sliding groove 12, a sliding rod 13 and a locking nut 14. The sliding groove 12 is arranged along the height direction of the vertical frame 1. The sliding rod 13 is arranged through the sliding groove 12. The sliding rod 13 and the second rod body 412 are coaxially arranged. The sliding rod 13 is connected to the end of the second rod body 412 far away from the first rod body 411. The locking nut 14 is threadedly connected to the end of the sliding rod 13 far away from the second rod body 412. One end of the second azimuth adjusting device 42 is sleeved on the first rod body 411. The sliding rod 13 can move and rotate in the sliding groove 12. The first traction piece 41 can rotate relative to the vertical frame 1 following the sliding rod 13. In this embodiment, the sliding rod 13 is arranged along the front-and-rear direction of the vertical frame 1, that is, the rotation direction of the first rod body 411 is the left-and-right direction. When the first rod body 411 faces the inner side of the vertical frame 1, the second azimuth adjusting device 42 can move along the first rod body 411 to approach the first traction assembly 3. When the first rod body faces the outer side of the vertical frame 1, the second azimuth adjusting device 42 can move along the first rod body 411 to be away from the first traction assembly 3, further improving the flexibility of the adjustment of the door fixing tooling.

[0035] The second azimuth adjustment device 42 includes a first collar 44, a second collar 45, two locking mechanisms 46, a movable rod 47, an extension block 48, a swing member 49 and a fine adjustment mechanism 40. The central axes of the first collar 44 and the second collar 45 are perpendicular to each other. The outer sides of the first collar 44 and the second collar 45 are connected to each other. The first collar 44 is sleeved on the first rod body 411. The movable rod 47 passes through the second collar 45. One of the locking mechanisms 46 connects the first collar 44 and the first rod body 411, and the other locking mechanism 46 connects the second collar 45 and the movable rod 47. The extension block 48 is arranged at one end of the movable rod 47 away from the second collar 45. The swing member 49 is hinged to the extension block 48. The fine adjustment mechanism 40 is arranged on the swing member 49 and is connected to the connecting member 43. The first collar 44 can move and rotate axially relative to the first rod body 411. The movable rod 47 moves back and forth along the second collar 45. The swing member 49 swings relative to the extension block 48 for fine adjustment in the front-back direction. Through multi-stage angle adjustment, the connecting member 43 is made parallel to the door back panel. The fine adjustment mechanism 40 adjusts the distance between the connecting member 43 and the door back panel, and is adjusted according to the door thickness and the back panel shape, with high flexibility of adjustment.

[0036] Each of the locking mechanisms 46 includes a first screw hole 461, a first screw rod 462 and a knob 463. The first screw hole 461 is arranged on the first collar 44 or the second collar 45. The knob 463 is arranged at one end of the first screw rod 462. The other end of the first screw rod 462 is threadedly connected to the first screw hole 461. By rotating the knob 463, the first screw rod 462 is screwed into or out of the first screw hole 461, and the first screw rod 462 presses against the first rod body 411 or the movable rod 47, so as to lock the connection between the first collar 44 and the first rod body 411, and between the second collar 45 and the movable rod 47.

[0037] The swing member 49 includes a first plane 491 and a second plane 492 which are perpendicularly arranged. The first plane 491 is hinged to the extension block 48. The fine adjustment mechanism 40 includes a second screw hole 401, a second screw 402, two gaskets 403 and two fine adjustment nuts 404. The second screw hole 401 is arranged on the second plane 492. The two gaskets 403 are respectively arranged on both sides of the second plane 492. The two fine adjustment nuts 404 respectively abut against one side of the two gaskets 403 facing away from the second plane 492. The second screw 402 sequentially passes through the two gaskets 403, the two fine adjustment nuts 404 and the second screw hole 401. The second screw 402 adjusts the distance between the connecting member 43 and the vehicle door. The relative movement between the second screw 402 and the second screw hole 401 is restricted by the two fine adjustment nuts 404.

[0038] The first traction assembly 3 includes a second traction member 31, a cushion block 32 and a clamping rod 33. The structure of the second traction member 31 is the same as that of the first traction member 41. The two ends of the second traction member 31 are respectively connected to the cushion block 32 and any one of the first orientation adjustment devices 11. The clamping rod 33 is arranged on the cushion block 32. In this embodiment, by arranging the sliding grooves 12 of adjacent first traction assemblies 3 parallel to the plane where the chassis 2 is located, the second traction member 31 can rotate around the sliding rod 13 in the front-back direction of the vertical frame 1, that is, adjust the inclination direction between the second traction member 31 and the vehicle door. By inserting the clamping rod 33 into the hinge of the vehicle door, one end of the vehicle door is fixed.

[0039] The vertical frame 1 includes a base 15, two vertical rods 16, an inner frame 17, four reinforcing members 18 and a pulley group 19. The pulley group 19 is arranged at the bottom of the base 15. The two vertical rods 16 are respectively arranged on both sides of the top of the base 15. Any two of the reinforcing members 18 are respectively connected to both sides of any one of the vertical rods 16 and the base 15. The two sides of the inner frame 17 are respectively connected to the two vertical rods 16. The connection between the two vertical rods 16 and the base 15 is reinforced by the four reinforcing members 18. At the same time, the vehicle door fixing tooling can be moved through the pulley group 19.

[0040] The inner skeleton 17 includes a fixed cross bar 171, a movable cross bar 172, two first guide grooves 173, two first connection components 174, a scissors frame 175, four second guide grooves 176, four second connection components 177 and a driving cylinder 178. Two ends of the fixed cross bar 171 are respectively connected to the two vertical rods 16. The two first guide grooves 173 are respectively arranged on the two vertical rods 16 in a one-to-one correspondence. The two first connection components 174 are respectively arranged through the two first guide grooves 173 in a one-to-one correspondence. The two first connection components 174 are respectively connected to two ends of the movable cross bar 172. Two of the second guide grooves 176 are arranged on both the fixed cross bar 171 and the movable cross bar 172. The four second connection components 177 are respectively arranged through the four second guide grooves 176 in a one-to-one correspondence. The four second connection components 177 are all connected to the scissors frame 175. The driving cylinder 178 is arranged on the fixed cross bar 171. An output end of the driving cylinder 178 is connected to the scissors frame 175. Four corners of the scissors frame 175 are connected by the four second connection components 177. When the driving cylinder 178 contracts, two ends of the width of the scissors frame 175 expand outwards along the second guide grooves 176 respectively, and a height distance of the scissors frame 175 decreases, thereby driving the movable cross bar 172 to rise along the first guide grooves 173. On the one hand, for vehicle doors with different heights and sizes, when fixing the vehicle door, the height positions where the bottom of the vehicle door presses against the vertical rod 16 are different, that is, the vertical rod 16 receives the force when the bottom of the vehicle door is hung. By adjusting the movable cross bar 172 to the position corresponding to the hanging position of the bottom of the vehicle door, the reinforcement requirements for different positions of the vertical rod 16 can be realized. On the other hand, when the movable cross bar 172 is flush with the position of the vehicle door that needs to be repaired, that is, the movable cross bar 172 obstructs the repair, the movable cross bar 172 can be moved to avoid the position of the vehicle door that needs to be repaired.

[0041] It can be understood that for those of ordinary skill in the art, equivalent substitutions or changes can be made according to the technical solutions and the inventive concept of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A door fixing tooling, characterized in that, Comprising: An upright frame (1), on which four first azimuth adjustment devices (11) are provided; A chassis (2), which is horizontally mounted on one side of the upright frame (1) to support the bottom of the vehicle door, and two of the first azimuth adjustment devices (11) below the upright frame (1) are respectively connected to both ends of the chassis (2); A first traction assembly (3), which is arranged above the chassis (2), and any one of the first azimuth adjustment devices (11) above the upright frame (1) is connected to the first traction assembly (3), and the first traction assembly (3) is connected to the hinge of the vehicle door; A second traction assembly (4), which is arranged on the side of the upright frame (1) away from the first traction assembly (3), and the second traction assembly (4) includes a first traction member (41), a second azimuth adjustment device (42) and a connecting member (43) connected in sequence. The other first azimuth adjustment device (11) above the upright frame (1) is connected to the first traction member (41), and the connecting member (43) is connected to the back panel of the vehicle door; The first traction member (41) includes a first rod body (411) and a second rod body (412). The first rod body (411) is perpendicularly arranged relative to the second rod body (412) at one end of the second rod body (412). The end of the second rod body (412) away from the first rod body (411) is connected to any one of the first azimuth adjustment devices (11). The second azimuth adjustment device (42) includes a first collar (44), a second collar (45), two locking mechanisms (46), a movable rod (47), an extension block (48), a swinging member (49) and a fine adjustment mechanism (40). The central axes of the first collar (44) and the second collar (45) are perpendicular to each other, and the outer sides of the first collar (44) and the second collar (45) are connected to each other. The first collar (44) is sleeved on the first rod body (411), the movable rod (47) passes through the second collar (45), one of the locking mechanisms (46) connects the first collar (44) and the first rod body (411), and the other locking mechanism (46) connects the second collar (45) and the movable rod (47). The extension block (48) is arranged at the end of the movable rod (47) away from the second collar (45), the swinging member (49) is hinged to the extension block (48), and the fine adjustment mechanism (40) is arranged on the swinging member (49) and connected to the connecting member (43).

2. The door fixing tooling according to claim 1, characterized in that, Each of the first azimuth adjustment devices (11) includes a chute (12), a slide bar (13) and a locking nut (14). The chute (12) is arranged along the height direction of the vertical frame (1). The slide bar (13) is disposed through the chute (12). The slide bar (13) and the second rod body (412) are coaxially arranged. The slide bar (13) is connected to one end of the second rod body (412) away from the first rod body (411). The locking nut (14) is threadedly connected to one end of the slide bar (13) away from the second rod body (412). One end of the second azimuth adjustment device (42) is sleeved on the first rod body (411).

3. The door fixing tooling according to claim 1, characterized in that, Each of the locking mechanisms (46) includes a first screw hole (461), a first screw rod (462) and a knob (463). The first screw hole (461) is provided on the first collar (44) or the second collar (45). The knob (463) is provided on one end of the first screw rod (462). The other end of the first screw rod (462) is threadedly connected to the first screw hole (461).

4. A door fixing tooling according to claim 1, characterized in that, The swinging member (49) includes a first plane (491) and a second plane (492) which are perpendicularly arranged. The first plane (491) is hinged to the extension block (48). The fine adjustment mechanism (40) includes a second screw hole (401), a second screw rod (402), two gaskets (403) and two fine adjustment nuts (404). The second screw hole (401) is provided on the second plane (492). The two gaskets (403) are respectively arranged on both sides of the second plane (492). The two fine adjustment nuts (404) are respectively abutted against one side of the two gaskets (403) facing away from the second plane (492). The second screw rod (402) is sequentially disposed through the two gaskets (403), the two fine adjustment nuts (404) and the second screw hole (401).

5. The door fixing tooling according to claim 1, characterized in that, The first traction assembly (3) includes a second traction member (31), a cushion block (32) and a clamping rod (33). The second traction member (31) has the same structure as the first traction member (41). The two ends of the second traction member (31) are respectively connected to the cushion block (32) and any one of the first azimuth adjustment devices (11). The clamping rod (33) is provided on the cushion block (32).

6. The door fixing tooling according to claim 1, characterized in that, The vertical frame (1) includes a base (15), two vertical rods (16), an inner skeleton (17), four reinforcing members (18) and a pulley set (19). The pulley set (19) is provided at the bottom of the base (15). The two vertical rods (16) are respectively arranged on both sides of the top of the base (15). Any two of the reinforcing members (18) are respectively connected to both sides of any one of the vertical rods (16) and the base (15). Both sides of the inner skeleton (17) are respectively connected to the two vertical rods (16).

7. The door fixing tooling according to claim 6, characterized in that, The inner frame (17) comprises a fixed cross bar (171), a movable cross bar (172), two first guide grooves (173), two first connecting assemblies (174), a scissor frame (175), four second guide grooves (176), four second connecting assemblies (177) and a driving cylinder (178), wherein the two ends of the fixed cross bar (171) are respectively connected to the two vertical bars (16), the two first guide grooves (173) are respectively arranged on the two vertical bars (16) in a one-to-one correspondence, and the two first connecting assemblies (174) are respectively inserted into the two first guide grooves (173) in a one-to-one correspondence. ), two of the first connection components (174) are respectively connected to the two ends of the movable cross bar (172), the fixed cross bar (171) and the movable cross bar (172) are each provided with two of the second guide grooves (176), four of the second connection components (177) are respectively and one by one arranged on the four second guide grooves (176), the four second connection components (177) are all connected to the scissor frame (175), the driving cylinder (178) is arranged on the fixed cross bar (171), and the output end of the driving cylinder (178) is connected to the scissor frame (175).

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