CN211517223U - Clamping mechanism for automobile assembly line - Google Patents

Abstract

The utility model discloses a fixture for automobile assembly line, the on-line screen storage device comprises a base, hold in the palm the claw down, go up and press claw and taut subassembly, be provided with the side extension board on the base, hold in the palm the claw down and slide along the vertical direction of side extension board and connect on the lateral wall of side extension board, one side that the side branch board held in the palm the claw down towards is equipped with the drive assembly who is used for driving down and holds in the palm the claw and remove, it rotates the top that sets up on the lateral wall of side extension board and lie in down the support claw to press the claw on, form the centre gripping chamber between lower support claw and the relative one side of last pressure claw, taut subassembly sets firmly first grip block and second grip block respectively with last side extension board and relative one side of keeping away from down support claw and last pressure claw, first grip block and second grip block symmetry set up. The operator can press the claw and hold in the palm the interval between the claw down to adjust in order to be applicable to the spare part of the different thickness of centre gripping, enlarged the utility model discloses a protection scope.

Description

Clamping mechanism for automobile assembly line

Technical Field

The utility model relates to a technical field of automobile manufacturing especially relates to a fixture for automobile assembly line.

Background

With the development of economic society, the living standard of people is continuously improved, almost every family possesses an automobile, and the automobile gradually becomes a main vehicle for people to go out.

The manufacturing process of the automobile mainly comprises the following steps: firstly, pressing a steel plate into a shell of a vehicle by using a punch; after the vehicle shell is finished, the vehicle body is usually turned upside down in order to facilitate the welding work in the subsequent steps;

after the preliminary welding is finished, righting the vehicle body, and additionally installing a vehicle door and a vehicle cover; fourthly, removing burrs and marks of each steel plate on the vehicle shell, and performing rust prevention treatment on the chassis to paint the vehicle body conveniently; fifthly, assembling a girder, resisting vibration, transmitting, an engine and other systems; and sixthly, decorating the interior of the automobile, wherein the interior of the automobile comprises glass, a windshield wiper, a saddle and the like, and a radiator (a water tank), a hydraulic system, a fuel system, wheels and the like are additionally arranged.

However, in the production process of automobile assembly line, need carry out the centre gripping to the spare part of different thickness fixedly, process the spare part again, consequently the utility model discloses need provide a fixture for automobile assembly line, can carry out the centre gripping to the spare part of different thickness.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a be not enough to prior art exists, the utility model aims at providing a fixture for automobile assembly line can be used for the spare part of the different thickness of centre gripping to the processing demand to the spare part of different thickness has been satisfied.

The above technical purpose of the present invention can be achieved by the following technical solutions: a clamping mechanism for an automobile assembly line comprises a base, a lower supporting claw, an upper pressing claw and a tensioning assembly, wherein a side supporting plate is arranged on the base, the lower supporting claw is connected to the side wall of the side supporting plate in a sliding mode along the vertical direction of the side supporting plate, a sliding block is fixedly connected to one side, facing the side supporting plate, of the lower supporting claw, a sliding groove is formed in one side, facing the lower supporting claw, of a side supporting plate along the vertical direction, the sliding block is embedded into the sliding groove and matched with the sliding groove, a driving assembly used for driving the lower supporting claw to move is arranged on one side, facing the lower supporting claw, of the side supporting plate, the upper pressing claw is rotatably arranged on the side wall of the side supporting plate and located above the lower supporting claw, a clamping cavity is formed between the opposite sides of the lower supporting claw and the upper pressing claw, the tensioning assembly is arranged on the side supporting plate and used for relatively tensioning the lower supporting claw and the upper pressing claw, a first clamping block and a second clamping block are fixedly arranged on one side, the first clamping block and the second clamping block are symmetrically arranged.

Through above-mentioned technical scheme, before the processing, the operator passes through drive assembly according to the thickness of the spare part of treating processing and moves lower support claw for the interval in centre gripping chamber suits with the thickness of the spare part of treating processing, then utilizes the rotation of last pressure claw, can open the centre gripping chamber relatively, thereby can put into the centre gripping chamber with the spare part, and make first grip block and second grip block press from both sides the spare part of treating processing tightly through taut subassembly. Set up like this, the operator can adjust the interval in centre gripping chamber according to the thickness of the spare part of treating processing for be applicable to the spare part of the different thickness of centre gripping between first grip block and the second grip block, enlarged the utility model discloses a fixture's application scope.

The utility model discloses further set up to: the drive assembly comprises a first fixing block fixedly connected to one side of the lower supporting claw in the width direction, a second fixing block is fixedly connected to one side of the side supporting plate facing the lower supporting claw below the first fixing block, a first screw rod is welded to one side of the first fixing block facing the second fixing block, and a first nut is connected to the first screw rod in a penetrating mode through the second fixing block and is in threaded connection with the first screw rod on the upper side and the lower side of the second fixing block.

Through above-mentioned technical scheme, the operator can wear to establish the second fixed block with first screw rod through twisting two first nuts for first screw rod drives first fixed block and holds in the palm the claw down and removes along the vertical direction of side extension board, holds in the palm the claw down and last the thickness looks adaptation of pressing the interval between the claw and the spare part of treating processing, and easy operation is convenient.

The utility model discloses further set up to: and one side of the sliding block facing the sliding groove is fixedly connected with an anti-slip pad.

Through above-mentioned technical scheme, the setting of slipmat has increased the frictional resistance between slider and the spout, reduces the slider in the gliding possibility of spout to be favorable to increasing the stability of being connected between slider and the spout.

The utility model discloses further set up to: the driving assembly comprises a cylinder, the cylinder is fixedly arranged on one side of the side supporting plate facing the lower supporting claw and is positioned below the lower supporting claw, and the output end of the cylinder is fixedly connected with one side of the lower supporting claw, which deviates from the upper pressing claw.

Through above-mentioned technical scheme, the output of cylinder carries out concertina movement to the support claw goes up and down under the drive, makes the interval in centre gripping chamber the same with the thickness of the spare part of treating processing, and easy operation is convenient, makes and presses the claw and hold in the palm the spare part that is applicable to the different thickness of centre gripping down between the claw.

The utility model discloses further set up to: the tensioning assembly comprises a hook clamp, a hook ring, a waist-shaped transposition block and a positioning abutting block, the hook clamp is arranged on the side wall of one side, close to the side supporting plate, of the upper pressing claw, the hook head of the hook clamp is bent upwards, the positioning abutting block is arranged on the side wall of one side, close to the side supporting plate, of the lower supporting claw, one side, far away from the side supporting plate, of the positioning abutting block is provided with a waist-shaped abutting groove attached to the outer edge of the waist-shaped transposition block, the top end of the waist-shaped transposition block is rotatably arranged at the top end of the waist-shaped abutting groove, the bottom end of the hook ring is hinged to one end, far away from the rotating point, of the waist-shaped transposition block, a wrench rod is arranged on the waist-shaped transposition block, and the; when the waist-shaped transposition block is clamped with the waist-shaped abutting groove, the hook ring hooks the hook clamp and pulls the upper pressing claw to press the lower supporting claw.

Through the technical scheme, when rotating waist type transposition piece, the circular motion is done to the bottom that waist type transposition piece can drive the shackle, thereby the top that drives the shackle takes place to remove in vertical direction, make waist type transposition piece support the groove with the waist type and throw off, the shackle shifts up, realize the separation of shackle and hook card, waist type transposition piece card is gone into when the waist type supports the groove, utilize waist type transposition piece and waist type to support the joint between the groove, when shifting the piece and fixing a position to the waist type, drive the shackle downstream and catch the hook card, and the pulling is pressed the claw downstream, thereby make and press the claw and hold in the palm the claw down and compress tightly spare part.

The utility model discloses further set up to: and a wear-resistant rubber pad is arranged on one side of the positioning abutting block, which faces the waist-shaped transposition block.

Through the technical scheme, when the waist type transposition block is clamped into the waist type abutting groove, the waist type transposition block abuts against the wear-resistant rubber pad, the wear-resistant rubber pad has elasticity, the abutting effect between the waist type transposition block and the waist type abutting groove is favorably increased, and the locking effect of the tensioning piece is favorably increased.

The utility model discloses further set up to: a through groove is formed in the lower supporting claw along the vertical direction, a rack is fixedly connected to one side, facing the through groove, of the first clamping block, a rotating shaft is arranged in the through groove in a rotating mode along the width direction, a gear is coaxially connected to the periphery of the rotating shaft, the rack penetrates through the through groove and is meshed with the gear, one end of the rotating shaft penetrates through the side wall of the lower supporting claw and is coaxially connected with a second screw rod, a second nut is rotatably connected onto the second screw rod, a sunken groove is coaxially formed in one side, facing the second nut, of the lower supporting claw along the axial direction of the rotating shaft, an inner tooth nut and an outer tooth nut of a sunken head inner angle are arranged in the sunken groove, through holes in the inner tooth nut of the sunken head inner angle are matched with the second nut, a section of a groove is axially formed in the groove wall of the sunken groove, a convex block matched with the groove is fixedly connected to the outer side of the inner, one side of the side support plate facing the second nut is connected with an insertion rod in a sliding mode, the second nut is partially limited in a through hole in the nut with the inner thread and the outer thread of the countersunk head inner angle in a normal state, and the insertion rod is inserted in the insertion groove.

Through the technical scheme, after spacing between holding in the palm claw and the last pressure claw is adjusted down through drive assembly, the operator twists the second nut, make the second nut move towards the direction that is close to holding in the palm the claw down, until the second nut and the interior outer relative one side of tooth nut of countersunk head interior angle laminate mutually, then the operator twists the interior outer tooth nut of countersunk head interior angle towards the direction that is close to the second nut and moves, make the interior outer tooth nut part cover of countersunk head interior angle establish the outside at the second nut, and remove the inserted bar and make the inserted bar peg graft in the inserting groove, the inside and outside tooth nut of countersunk head interior angle has played the restriction effect, thereby the effect of restriction has been played second nut and second screw rod.

The utility model discloses further set up to: and a rubber layer is fixedly arranged in the insertion groove.

Through above-mentioned technical scheme, when the spliced pole is pegged graft in the inserting groove, the spliced pole is inconsistent with the rubber layer, and the setting on rubber layer has increased the frictional resistance between spliced pole and the inserting groove, has increased the stability of being connected between spliced pole and the inserting groove to be favorable to strengthening the limiting displacement to the interior outer tooth nut of countersunk head interior angle.

To sum up, the utility model discloses following beneficial effect has:

1. the distance between the lower supporting claw and the upper pressing claw can be conveniently adjusted by an operator, so that the upper pressing claw and the lower supporting claw are suitable for clamping and fixing automobile parts with different thicknesses, and the application range is expanded;

2. after the distance between the upper pressing claw and the lower supporting claw is adjusted, an operator can adjust the distance between the first clamping block and the second clamping block conveniently, and the accuracy of adjustment is realized.

Drawings

Fig. 1 is a schematic view of the entire structure of embodiment 1.

Fig. 2 is a schematic structural view of a connecting structure for embodying a slider and a chute in embodiment 1.

Fig. 3 is a schematic structural diagram for showing the connection relationship between the through-groove internal gear and the rack in embodiment 1.

Fig. 4 is an enlarged view of a portion a in fig. 2.

Fig. 5 is an enlarged view of a portion B in fig. 1.

Fig. 6 is a schematic structural view for showing the connection relationship of the nut with the inner and outer threads in the countersunk interior angle to the second nut and the second screw in embodiment 1.

Fig. 7 is a schematic structural view for embodying the locking assembly in embodiment 1.

FIG. 8 is a schematic view of the entire structure of embodiment 2.

Reference numerals: 1. a base; 11. a side support plate; 111. a chute; 12. a lower supporting claw; 121. a slider; 1211. a non-slip mat; 122. a first clamping block; 123. a through groove; 124. a rack; 125. a gear; 126. a rotating shaft; 1261. a second screw; 1262. a second nut; 127. sinking a groove; 1271. a groove; 128. inner and outer thread nuts of the countersunk head inner angle; 1281. a bump; 1282. a plug rod; 1283. inserting grooves; 1284. a rubber layer; 13. pressing the claw upwards; 131. a second clamping block; 14. a clamping cavity; 15. connecting blocks; 16. rotating the block; 17. rotating the rod; 18. a position-giving rod; 181. a screw hole; 182. mounting a rod; 183. a ring; 2. a tension assembly; 21. hooking and clamping; 22. a shackle; 23. a waist-shaped transposition block; 231. a spanner bar; 24. positioning a resisting block; 241. a waist-shaped abutting groove; 242. a wear-resistant rubber pad; 3. a drive assembly; 31. a first fixed block; 32. a second fixed block; 33. a first screw; 34. a first nut; 35. and a cylinder.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1: referring to fig. 1, for the utility model discloses a fixture for automobile assembly line, including base 1, lower support claw 12, go up and press claw 13 and connect the side extension board 11 on base 1, base 1 is the L type, and side extension board 11 passes through the bolt tightening to be fixed at the vertical lateral wall of base 1. The upper pressing claw 13 and the lower supporting claw 12 are connected with the side supporting plate 11.

Referring to fig. 1, the upper pressing claw 13 is rotatably connected to the side supporting plate 11, the side supporting plate 11 is fixedly connected with a connecting block 15 through a bolt, a rotating block 16 is arranged between the connecting block 15 and the upper pressing claw 13, two ends of the rotating block 16 are respectively rotatably connected with the connecting block 15 and the rotating block 16, and the connecting block 15 and the rotating block 16 are simultaneously rotatably connected with a rotating rod 17.

Referring to fig. 1 and 2, the upper pressing claw 13 is disposed above the lower supporting claw 12, the lower supporting claw 12 is connected to the side supporting plate 11 in a sliding manner, a sliding groove 111 is formed in one side of the side supporting plate 11 facing the lower supporting claw 12 in the vertical direction, a sliding block 121 is welded to one end of the lower supporting claw 12 facing the sliding groove 111, in this embodiment, the sliding groove 111 and the sliding block 121 are a dovetail groove and a dovetail block which are matched with each other, and a layer of anti-slip pad 1211 is bonded to one side of the sliding block 121 facing the sliding groove 111. The provision of the anti-slip pad 1211 is advantageous to increase the frictional resistance between the slider 121 and the sliding groove 111, thereby increasing the tightness of the connection between the slider 121 and the sliding groove 111. A clamping cavity 14 is formed between the opposite sides of the lower supporting claw 12 and the upper pressing claw 13, a first clamping block 122 and a second clamping block 131 are fixedly arranged on the opposite sides of the lower supporting claw 12 and the upper pressing claw 13 far away from the side support plate 11 respectively, and the first clamping block 122 and the second clamping block 131 are symmetrically arranged.

Referring to fig. 1, the yielding rod 18 is vertically arranged on the vertical side wall of the upper pressing claw 13 through a bolt, three screw holes 181 arranged along the length direction of the yielding rod 18 are arranged on the side wall of the yielding rod 18, the screw holes 181 are connected with an installation rod 182 through bolts, and a supporting ring 183 is arranged at one end, away from the yielding rod 18, of the installation rod 182. When the part is processed, the screw hole 181 at a proper position is selected to be connected with the mounting rod 182 according to the size of the part, so that the supporting ring 183 is far away from the part, and then the relevant workpiece is placed in the supporting ring 183.

Referring to fig. 1, the side bearer plate 11 is equipped with the drive assembly 3 that is used for driving the lower support claw 12 to move towards one side of the lower support claw 12, the drive assembly 3 includes first fixed block 31 and second fixed block 32, first fixed block 31 bonds and fixes one side along the width direction at the lower support claw 12, the side bearer plate 11 bonds and has a second fixed block 32 in the below of the lower support claw 12, first fixed block 31 has first screw 33 towards one side welding of second fixed block 32, first screw 33 wears to establish second fixed block 32 and has first nut 34 in the equal threaded connection in the upper and lower both sides of second fixed block 32. When parts with different thicknesses need to be machined, an operator rotates and moves the two first nuts 34 towards a direction away from the second fixed block 32, so that the first screw 33 penetrates through the second fixed block 32 to drive the lower supporting claw 12 to move along the vertical direction of the side supporting plate 11, and the distance between the clamping cavities 14 is adaptive to the thickness of the part to be machined.

Referring to fig. 1 and 3, a through groove 123 is formed in the lower holding claw 12 along the vertical direction, a rotating shaft 126 is rotatably arranged in the through groove 123 along the width direction, a gear 125 is coaxially connected to the periphery of the rotating shaft 126, and a rack 124 is fixedly connected to one side of the first clamping block 122 facing the through groove 123. The rack 124 is inserted into the through groove 123 and slidably connected to the sidewall of the through groove 123 (fig. 4), and the rack 124 is engaged with the gear 125.

Referring to fig. 4 and 5, one end of the rotating shaft 126 penetrates through the side wall of the lower supporting claw 12 and is coaxially welded with the second screw 1261, one side of the lower supporting claw 12 facing the second screw 1261 is provided with a sinking groove 127, the sinking groove 127 is coaxial with the rotating shaft 126, the sinking groove 127 is internally provided with an inner and outer tooth nut 128 of a sinking inner angle, the outer side wall of the inner and outer tooth nut 128 of the sinking inner angle is bonded with a projection 1281, the groove wall of the sinking groove 127 is provided with a section of groove 1271 along the vertical direction, the projection 1281 is embedded into the groove 1271, and the inner and outer tooth nut 128 of the sinking inner angle and the sinking groove 127 are slidably connected through the matching of the projection 1281 and the groove.

Referring to fig. 5 and 6, a second nut 1262 is rotatably coupled to the second screw 1261, and an outer side of the second nut 1262 is fitted into a through hole of the inner and outer thread nuts 128 of the countersunk inner corner. An inserting groove 1283 is formed in the outer side wall of the nut 128 with the inner tooth and the outer tooth of the countersunk inner angle, a rubber layer 1284 side support plate 11 is fixedly arranged in the inserting groove 1283, and an inserting rod 1282 matched with the inserting groove 1283 is connected to one side of the second nut 1262 in a sliding manner. Under normal conditions, the second nut 1262 is partially limited in the through hole on the inner and outer nuts 128 of the inner corner of the countersunk head, and the plug-in rod 1282 is plugged in the plug-in groove 1283 and is abutted against the rubber layer 1284.

Referring to fig. 5 and 6, when the distance between the first clamping block 122 and the second clamping block 131 needs to be adjusted and reduced, an operator moves the plugging rod 1282 out of the plugging slot 1283, pushes the nut 128 with inner and outer threads at the inner corner of the countersunk head into the sinking slot 127, then rotates the second screw 1261, so that the rotating shaft 126 rotates and drives the gear 125 to rotate, so that the rack 124 moves along the vertical direction, and the first clamping block 122 is lifted and lowered, so that the distance between the first clamping block 122 and the second clamping block 131 is the same as the thickness of the part to be processed.

Referring to fig. 7, the tensioning assembly 2 includes a hook 21, a hook ring 22, a waist-shaped shifting block 23 and a positioning abutting block 24, the hook 21 is disposed on a side wall of the upper pressing claw 13 near one side of the side support plate 11, the positioning abutting block 24 is disposed on a side wall of the lower supporting claw 12 near one side of the side support plate 11, a waist-shaped abutting groove 241 attached to an outer edge of the waist-shaped shifting block 23 is disposed on a side of the positioning abutting block 24 away from the side support plate 11, a top end of the waist-shaped shifting block 23 is rotatably disposed at a top end of the waist-shaped abutting groove 241, and a wear-resistant rubber pad 242 is bonded to a side of the positioning abutting block 24 facing the waist-shaped shifting block 23.

Referring to fig. 7, the bottom end of the hook ring 22 is hinged to one end of the waist-shaped transposition block 23 away from the rotation point, a wrench rod 231 is arranged on the waist-shaped transposition block 23, and the waist-shaped transposition block 23 is movably clamped with the waist-shaped abutting groove 241. The wrench rod 231 is rotated upwards to enable the waist-shaped shifting block 23 to be far away from the waist-shaped abutting groove 241, at the moment, the hook ring 22 moves upwards to be away from the hook clamp 21, then the upper pressing claw 13 (shown in figure 1) is rotated upwards through overturning the rotating rod 17, parts are conveniently placed in the clamping cavity 14 (shown in figure 1), after the parts are placed, the hook ring 22 is hung on the hook clamp 21, the wrench rod 231 is rotated downwards to enable the hook ring 22 to move downwards to tighten the upper pressing claw 13, and meanwhile, the waist-shaped shifting block 23 enters the waist-shaped abutting groove 241.

The implementation principle of the embodiment is as follows: when the part to be processed needs to be clamped and fixed, an operator adjusts the distance between the lower supporting claw 12 and the upper pressing claw 13 through the driving assembly 3, further adjusts the distance between the first clamping block 122 and the second clamping block 131 through the matching of the gear 125 and the rack 124, and turns the wrench rod 231 upwards, so that the hook ring 22 is relatively disengaged from the hook clamp 21, the upper pressing claw 13 is rotated upwards through the rotating rod 17, and the part to be processed is clamped between the first clamping block 122 and the second clamping block 131. Finally, the lever 231 is turned downward to clamp the hook ring 22 to the hook clip 21, so that the first and second clamping blocks 122 and 131 clamp and fix the component.

Example 2: referring to fig. 8, for the utility model discloses a fixture for automobile assembly line, different from embodiment 1, drive assembly 3 includes cylinder 35, and the lateral wall of cylinder 35 bonds in side extension board 11 towards one side of holding in the palm 12 down and is located the below of holding in the palm 12 down, and the output welding of cylinder 35 holds in the palm 12 down and deviates from one side of last pressure claw 13.

Referring to fig. 8, when the distance between the upper pressing claw 13 and the lower supporting claw 12 needs to be adjusted, the output end of the air cylinder 35 makes telescopic motion, so that the lower supporting claw 12 makes lifting motion in the vertical direction, and the distance between the upper pressing claw 13 and the lower supporting claw 12 is the same as the thickness of the part to be processed. The arrangement is convenient for adjusting the distance between the upper pressing claw 13 and the lower supporting claw 12, so that the upper pressing claw 13 and the lower supporting claw 12 are suitable for clamping parts with different thicknesses.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims (8)

1. A fixture for automobile assembly line which characterized in that: the clamping device comprises a base (1), a lower supporting claw (12), an upper pressing claw (13) and a tensioning assembly (2), wherein a side support plate (11) is arranged on the base (1), the lower supporting claw (12) is connected to the side wall of the side support plate (11) in a sliding mode along the vertical direction of the side support plate (11), a sliding block (121) is fixedly connected to one side, facing the side support plate (11), of the lower supporting claw (12), the sliding groove (111) is formed in one side, facing the lower supporting claw (12), of the side support plate (11) along the vertical direction, the sliding block (121) is embedded into the sliding groove (111) and matched with the sliding groove (111), a driving assembly (3) used for driving the lower supporting claw (12) to move is arranged on one side, facing the lower supporting claw (12), of the upper pressing claw (13) is rotatably arranged on the side wall of the side support plate (11) and located above the lower supporting claw (12), and a clamping cavity (14) is formed between the lower supporting claw (12) and the opposite side of the upper pressing, the tensioning assembly (2) is arranged on the side support plate (11) and used for oppositely tensioning the lower support claw (12) and the upper pressing claw (13), the lower support claw (12) and the upper pressing claw (13) are far away from the side support plate (11), one opposite sides of the lower support claw (12) and the upper pressing claw (13) are respectively and fixedly provided with a first clamping block (122) and a second clamping block (131), and the first clamping block (122) and the second clamping block (131) are symmetrically arranged.

2. The clamping mechanism for the automobile assembly line according to claim 1, characterized in that: drive assembly (3) include first fixed block (31) of one side of fixed connection support claw (12) along width direction under, one side of support claw (12) is equipped with second fixed block (32) in the below rigid coupling of first fixed block (31) down towards side extension board (11), first fixed block (31) have first screw rod (33) towards one side welding of second fixed block (32), first screw rod (33) are worn to establish second fixed block (32) and are had first nut (34) in the equal threaded connection in the upper and lower both sides of second fixed block (32).

3. The clamping mechanism for the automobile assembly line according to claim 2, characterized in that: and one side of the sliding block (121) facing the sliding chute (111) is fixedly connected with an anti-skid pad (1211).

4. The clamping mechanism for the automobile assembly line according to claim 1, characterized in that: the driving assembly (3) comprises an air cylinder (35), the air cylinder (35) is fixedly arranged on one side, facing the lower supporting claw (12), of the side supporting plate (11) and is located below the lower supporting claw (12), and the output end of the air cylinder (35) is fixedly connected to one side, facing away from the upper pressing claw (13), of the lower supporting claw (12).

5. The clamping mechanism for the automobile assembly line according to claim 1, characterized in that: the tensioning component (2) comprises a hook clamp (21), a hook ring (22), a waist-shaped transposition block (23) and a positioning resisting block (24), the hook clamp (21) is arranged on the side wall of the upper pressing claw (13) close to the side support plate (11), the hook head of the hook clamp (21) is bent upwards, the positioning resisting block (24) is arranged on the side wall of the lower supporting claw (12) close to one side of the side supporting plate (11), a waist-shaped abutting groove (241) jointed with the outer edge of the waist-shaped transposition block (23) is arranged on one side of the positioning abutting block (24) far away from the side support plate (11), the top end of the waist-shaped transposition block (23) is rotatably arranged at the top end of the waist-shaped abutting groove (241), the bottom end of the hook ring (22) is hinged at one end of the waist-shaped transposition block (23) far away from the rotating point, a wrench rod (231) is arranged on the waist-shaped transposition block (23), and the waist-shaped transposition block (23) is movably clamped with the waist-shaped abutting groove (241); when the waist-shaped transposition block (23) is clamped with the waist-shaped abutting groove (241), the hook ring (22) hooks the hook clamp (21) and pulls the upper pressing claw (13) to press the lower supporting claw (12).

6. The clamping mechanism for the automobile assembly line according to claim 5, characterized in that: one side of the positioning resisting block (24) facing the waist-shaped transposition block (23) is provided with a wear-resistant rubber pad (242).

7. The clamping mechanism for the automobile assembly line according to claim 1, characterized in that: a through groove (123) is formed in the lower supporting claw (12) along the vertical direction, a rack (124) is fixedly connected to one side, facing the through groove (123), of the first clamping block (122), a rotating shaft (126) is rotatably arranged in the through groove (123) along the width direction, a gear (125) is coaxially connected to the periphery of the rotating shaft (126), the rack (124) penetrates through the through groove (123) and is meshed with the gear (125), one end of the rotating shaft (126) penetrates through the side wall of the lower supporting claw (12) and is coaxially connected with a second screw rod (1261), a second nut (1262) is rotatably connected to the second screw rod (1261), a sunken groove (127) is coaxially formed in one side, facing the second nut (1262), of the lower supporting claw (12) along the axial direction of the rotating shaft (126), a sunken head inner-angle inner-outer-tooth nut (128) is arranged in the sunken groove (127), and a through hole in the sunken head-inner-angle inner-outer-tooth nut (128) is matched with the, a groove (1271) is axially formed in the wall of the sunken groove (127), a bump (1281) matched with the groove (1271) is fixedly connected to the outer side of the inner and outer nuts (128) of the inner corner of the sunken head, an insertion groove (1283) is formed in the outer side wall of the inner and outer nuts (128) of the inner corner of the sunken head, an insertion rod (1282) is connected to one side of the side support plate (11) facing the second nut (1262) in a sliding mode, the second nut (1262) is partially limited in a through hole in the inner and outer nuts (128) of the inner corner of the sunken head in a normal state, and the insertion rod (1282) is inserted into the insertion groove (1283).

8. The clamping mechanism for an automobile assembly line according to claim 7, characterized in that: a rubber layer (1284) is fixedly arranged in the inserting groove (1283).

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