Clamping tool for assembling automobile parts

Abstract

The invention relates to a mechanical clamping technology, in particular to a clamping tool for assembling automobile parts, which comprises a horizontally arranged cross beam, and clamping seats are symmetrically arranged on two sides of the cross beam; a first sliding rail is arranged on the side, away from the cross beam, of the clamping base and connected with the clamping arm through a flexible structure. A transmission mechanism is further arranged on the clamping seat, and the transmission mechanism is matched with the cross beam and the first sliding rail; an overturning structure is further arranged between the clamping base and the flexible structure. Through the arranged transmission mechanism, in the process that the clamping base gets close to the center of the cross beam, on the basis that the first sliding rail is driven to move along with the clamping base, the first sliding rail is driven to move relative to the clamping base, and then the rapid clamping action of the clamping arm is achieved.

Description

Technical Field

[0001] The invention relates to a mechanical clamping technology, in particular to a clamping tool for assembling automobile parts. Background Art

[0002] Efficient and accurate vehicle production requires advanced technical support. In this field, the end gripper, with its intelligent and high-precision features, is becoming a powerful assistant in the automobile assembly process.

[0003] As an important part of industrial robots, the end gripper is directly involved in the assembly process, which is the last link of automobile production. It can accurately grip, flip and place parts according to instructions, thus ensuring the smoothness and accuracy of the assembly process. In automobile production lines, the application of end grippers is becoming more and more widespread.

[0004] The end grippers commonly used in the industry are basically multi-source driven with servo control algorithms to achieve tasks such as gripping, flipping, and placing; however, when the components that execute the action (such as cylinders, hydraulic cylinders, motors, etc.) switch between start and stop, there will inevitably be impact. This is because the execution unit is given momentum when it is in action, and it needs to be unloaded in time to eliminate the momentum when it stops; the momentum is positively correlated with the speed of the execution unit. When the mass of the execution unit remains unchanged, the speed of the execution unit can be used to characterize its momentum.

[0005] The magnitude of the impact caused by the conversion of momentum during the above-mentioned start-stop process depends on the action rate of the execution unit. In order to reduce the wear, vibration, error, and failure caused by the impact, the speed of the execution unit should be reduced; but directly reducing the execution speed of the execution unit will inevitably lead to a decrease in production efficiency. Summary of the invention

[0006] The object of the present invention is to provide a clamping tool for assembling automobile parts to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: A clamping tool for assembling automobile parts, comprising a horizontally arranged crossbeam, and clamping seats movable along the length direction of the crossbeam are symmetrically arranged on both sides of the crossbeam; A first slide rail capable of moving relative to the clamping seat along the length direction of the cross beam is provided on the side of the clamping seat away from the cross beam, and the first slide rail is connected to the clamping arm via a flexible structure; The clamping seat is also provided with a transmission mechanism, which cooperates with the cross beam and the first slide rail; when the clamping seat approaches the center of the cross beam along the length direction of the cross beam, the transmission mechanism drives the first slide rail to move relative to the clamping seat, and makes the first slide rail approach the center of the cross beam faster than the clamping seat; A flipping structure is also provided between the clamping seat and the flexible structure, and when the first slide rail drives the clamping arm to move to the end of its travel close to the center of the beam, the flipping structure drives the clamping arm to flip downward.

[0008] The clamping tool for assembling automobile parts as described above: an electric telescopic mechanism is installed on a side of the crossbeam away from the clamping seat, and the telescopic end of the electric telescopic mechanism is connected to the clamping seat through a connecting piece; The crossbeam is provided with a slide groove through which the connecting member can pass and slide, and a second slide rail is provided on the side of the crossbeam facing the clamping arm, the second slide rail is fixed to the crossbeam through a fixed bent foot, and the second slide rail is slidably matched with a cavity provided on the clamping seat; A sliding channel communicated with the cavity is provided on the clamping seat, and the fixed bent leg passes through the sliding channel and slides with the sliding channel.

[0009] The above-mentioned clamping tool for assembling automobile parts: the transmission mechanism includes a lead screw rotatably arranged on the clamping seat, a gear transmission structure matched with the crossbeam, and a differential structure connecting the gear transmission structure and the lead screw; When the clamping seat moves along the length direction of the beam, the lead screw is driven to rotate through the gear transmission structure and the differential structure; A ferrule is fixed on the first slide rail, and the ferrule is threadably matched with the lead screw.

[0010] The clamping tool for assembling automobile parts as described above: the gear transmission structure includes a tooth plate fixedly arranged on the cross beam along the length direction of the cross beam, and a gear rotated on the clamping seat by a rotating shaft; wherein the gear and the tooth plate are engaged with each other; The differential structure includes an input shaft rotatably disposed on the clamping seat and connected to the rotating shaft, a differential installed in the clamping seat, and a synchronous belt connecting the output end of the differential and the lead screw; The input shaft is connected to the rotating shaft via a transmission belt.

[0011] The clamping tool for assembling automobile parts as described above: the flexible structure includes a limiting sleeve fixed on the first slide rail through a frame, a slide cylinder with one end slidingly disposed in the limiting sleeve, and a telescopic member rotatably matched with the slide cylinder; The other end of the slide tube passes through one end of the limiting sleeve near the center of the beam, and one end of the telescopic member also extends from one end of the slide tube near the center of the beam; One end of the telescopic member extending out of the slide cylinder is fixed to the clamping arm, and a spring is arranged between the slide cylinder and the inner wall of the limiting sleeve.

[0012] The above-mentioned clamping tool for assembling automobile parts: the flip structure includes a rotating rod matched with the telescopic part, and a guide rail assembly for driving the rotating rod to rotate when the limiting sleeve moves to the end of the stroke close to the center of the crossbeam; one end of the rotating rod is in the limiting sleeve and matched with the inside of the telescopic part; The other end of the rotating rod passes through an end of the limiting sleeve away from the center of the crossbeam, and the rotating rod is rotatably matched with the limiting sleeve; A convex ridge is integrally provided on a section of the outer wall of the rotating rod extending into the limiting sleeve along its length direction, and a guide groove slidably matched with the convex ridge is provided on an inner wall of the telescopic member on one side facing the rotating rod.

[0013] The clamping tool for assembling automobile parts as described above: the guide rail assembly includes a rod sleeve fixed to the clamping seat through a truss, a pit is provided on the inner wall of the rod sleeve, and a groove is provided on the outer wall of a section of the rotating rod passing through the limiting sleeve; A ball is movably embedded between the embedding groove and the pit.

[0014] The clamping tool for assembling automobile parts as described above: the embedding groove includes a straight portion and a spiral portion, the spiral portion is smoothly connected with the straight portion, the straight portion is close to the limiting sleeve, and the spiral portion is far away from the limiting sleeve; The straight portion is parallel to the axis of the rotating rod.

[0015] Compared with the prior art, the beneficial effect of the present invention is that: through the transmission mechanism, when the clamping seat approaches the center of the beam, the first slide rail is driven to move relative to the clamping seat on the basis of following the movement of the clamping seat, thereby realizing the rapid clamping action of the clamping arm.

[0016] By setting up two levels of co-directional activities to overlap each other, the action rate of the power source for driving execution can be reduced. The power source for driving execution is only responsible for providing one-level drive, that is, the activity rate requirement of the clamping seat is not high; while the transmission mechanism uses the transmission method to achieve a two-level speed increase based on the relatively slow movement of the clamping seat, thereby ensuring that the action rate of the power source for driving execution is reduced without affecting the absolute action speed of the clamping arm of the terminal, which is obviously better for wear, failure, and end-of-stroke error caused by the impact of the equipment.

[0017] In addition, the present invention utilizes the provided flipping structure in cooperation with the transmission mechanism, so that the clamping arm automatically flips after completely clamping the automobile accessory, which facilitates subsequent assembly reference positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a clamping tool for assembling automotive parts.

[0019] Figure 2 This is a schematic diagram of the partial structure on the back of the clamping tooling used for assembling automotive parts after it has been removed.

[0020] Figure 3 For Figure 2 A schematic diagram of the structure in which the clamping seat on one side is removed from the beam.

[0021] Figure 4 for Figure 3 Schematic diagram of the structure from another perspective.

[0022] Figure 5 This is a schematic diagram of the results on the back of the clamping seat.

[0023] Figure 6 It is a schematic diagram after the second slide rail is removed from the cavity.

[0024] Figure 7 This is a schematic diagram of the structure after the second slide rail is removed.

[0025] Figure 8 For Figure 7 A schematic diagram of the internal structure of the clamping seat is shown in FIG.

[0026] Fig. 9 It is a schematic diagram of the structure of the limit sleeve and the frame being separated.

[0027] Fig.10 This is a schematic diagram after the rod sleeve is detached from the rotating rod.

[0028] Fig.11 It is a schematic diagram of the clamping arm after being disassembled from one end of the telescopic member.

[0029] Fig.12 This is a schematic diagram of the separation of the limiting sleeve and its internal structure.

[0030] Fig.13 This is a schematic diagram after the rotating rod, the slide cylinder, and the telescopic member are completely disassembled.

[0031] Fig.14 It is a schematic diagram of the structure of the rod sleeve and the balls on its inner wall.

[0032] In the figure: 1, crossbeam; 101, slide groove; 2, clamping seat; 201, sliding channel; 202, cavity; 3, first slide rail; 4, clamping arm; 5, electric telescopic mechanism; 6, connecting piece; 7, second slide rail; 8, fixed bent foot; 9, tooth plate; 10, gear; 11, rotating shaft; 12, transmission belt; 13, input shaft; 14, differential; 15, synchronous belt; 16, lead screw; 17, hoop; 18, frame; 19, limiting sleeve; 20, slide cylinder; 21, telescopic member; 2101, guide groove; 22, spring; 23, rotating rod; 2301, convex ridge; 2302, embedded groove; 24, rod sleeve; 25, ball bearing; 26, truss. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] See also Figure 1-Figure 14 As an embodiment of the present invention, the clamping tool for assembling automobile parts comprises a horizontally arranged crossbeam 1, and clamping seats 2 movable along the length direction of the crossbeam 1 are symmetrically arranged on both sides of the crossbeam 1; A first slide rail 3 capable of moving relative to the clamping seat 2 along the length direction of the cross beam 1 is provided on the side of the clamping seat 2 away from the cross beam 1, and the first slide rail 3 is connected to the clamping arm 4 via a flexible structure; The clamping seat 2 is also provided with a transmission mechanism, which cooperates with the cross beam 1 and the first slide rail 3; when the clamping seat 2 approaches the center of the cross beam 1 along the length direction of the cross beam 1, the transmission mechanism drives the first slide rail 3 to move relative to the clamping seat 2, and makes the first slide rail 3 approach the center of the cross beam 1 faster than the clamping seat 2; A flipping structure is also provided between the clamping seat 2 and the flexible structure. When the first slide rail 3 drives the clamping arm 4 to move to the end of its travel close to the center of the beam 1, the flipping structure drives the clamping arm 4 to flip downward.

[0035] In this embodiment, the transmission mechanism is set up so that when the clamping seat 2 approaches the center of the beam 1, it drives the first slide rail 3 to move relative to the clamping seat 2 on the basis of following the movement of the clamping seat 2, thereby realizing a rapid clamping action of the clamping arm 4.

[0036] It should be noted that, in theory, based on the technical concept of the present invention, the effect of rapid movement of the clamping arm 4 can also be achieved by increasing the activity speed of the clamping seat 2; however, in the actual production process, if the activity speed of the power source of a single drive is increased blindly, there will be a huge impact caused by rapid start and stop, which is not conducive to wear, failure, and stroke error. In the present invention, the action rate of the power source of the drive execution can be reduced by setting two levels of unidirectional activities to overlap each other. The power source of the drive execution is only responsible for providing one-level drive, that is, the activity rate of the clamping seat 2 is not required to be high; and the transmission mechanism, on the basis of the relatively slow movement of the clamping seat 2, uses the transmission method to achieve a two-level speed increase, thereby ensuring that the action rate of the power source of the drive execution is reduced without affecting the absolute action speed of the clamping arm 4 of the terminal, which is obviously better for the wear, failure, and end-of-stroke error caused by the impact of the equipment.

[0037] In addition, the present invention utilizes the provided flipping structure in cooperation with the transmission mechanism so that the clamping arm 4 automatically flips over after completely clamping the automobile accessory, thereby facilitating subsequent assembly reference positioning.

[0038] As a further solution of the present invention, an electric telescopic mechanism 5 is installed on the side of the beam 1 facing away from the clamping seat 2, wherein the electric telescopic mechanism 5 is an application of the prior art, such as a hydraulic gear-driven electric telescopic mechanism, a pneumatic electric telescopic mechanism, and a motor-driven electric telescopic mechanism, which will not be described in detail here.

[0039] The telescopic end of the electric telescopic mechanism 5 is connected to the clamping seat 2 via a connecting piece 6 . Specifically, one end of the connecting piece 6 is fixed to the telescopic end of the electric telescopic mechanism 5 , and the other end of the connecting piece 6 is fixed to the clamping seat 2 .

[0040] The cross beam 1 is provided with a sliding groove 101 through which the connecting member 6 can pass and slide.

[0041] In this embodiment, the electric telescopic mechanism 5 drives the connecting member 6 to move along the length direction of the beam 1, thereby driving the clamping seat 2 to move synchronously.

[0042] In addition, in order to increase the stability of the clamping seat 2 during movement, a second slide rail 7 is provided on the side of the beam 1 facing the clamping arm 4, and the second slide rail 7 is fixed to the beam 1 through a fixed bent foot 8, and the second slide rail 7 is slidably matched with the cavity 202 provided on the clamping seat 2.

[0043] A sliding channel 201 communicating with the receiving cavity 202 is provided on the clamping seat 2 , and the fixed bent leg 8 passes through the sliding channel 201 and slides therewith.

[0044] Since the second slide rail 7 is provided and the second slide rail 7 slides in cooperation with the cavity 202, the stability of the clamping seat 2 along the length direction of the beam 1 can be further increased, thereby avoiding the clamping seat 2 completely relying on the connecting member 6 and the slide groove 101 for bearing, thereby avoiding failures caused by breakage, deformation and wear of the connecting member 6.

[0045] As a further solution of the present invention, the transmission mechanism includes a lead screw 16 rotatably disposed on the clamping seat 2, a tooth transmission structure matched with the crossbeam 1, and a differential structure connecting the tooth transmission structure and the lead screw 16; When the clamping seat 2 moves along the length direction of the beam 1, the lead screw 16 is driven to rotate through the gear transmission structure and the differential structure; A ferrule 17 is fixed on the first slide rail 3 , and the ferrule 17 is threadably matched with the lead screw 16 .

[0046] In this embodiment, when the electric telescopic mechanism 5 drives the clamping seat 2 to move along the length direction of the beam 1, the gear transmission mechanism and the differential structure drive the lead screw 16 to rotate, and the lead screw 16 cooperates with the hoop 17 to drive the first slide rail 3 to move further in the same direction while following the movement of the clamping seat 2, so as to increase the absolute speed of the clamping arm 4.

[0047] As a further solution of the present invention, the gear transmission structure includes a tooth plate 9 fixedly arranged on the cross beam 1 along the length direction of the cross beam 1, and a gear 10 arranged on the clamping seat 2 and rotating through a rotating shaft 11; wherein the gear 10 and the tooth plate 9 are engaged with each other; The differential structure includes an input shaft 13 rotatably disposed on the clamping seat 2 and connected to the rotating shaft 11, a differential 14 installed in the clamping seat 2, and a synchronous belt 15 connecting the output end of the differential 14 and the lead screw 16; The input shaft 13 is connected to the rotating shaft 11 via a transmission belt 12 , and the differential 14 is also an application of the prior art, including but not limited to a worm gear differential, a two-stage helical gear differential, and the like.

[0048] In this embodiment, when the electric telescopic mechanism 5 drives the clamping seat 2 to move along the length direction of the beam 1, the gear 10 cooperates with the toothed plate 9 to drive the rotating shaft 11 to rotate while following the movement of the clamping seat 2; the rotating shaft 11 then drives the input shaft 13 of the differential 14 to rotate with the help of the transmission belt 12, and after the differential 14 increases the speed, it drives the screw 16 to rotate rapidly through the synchronous belt 15.

[0049] As a further solution of the present invention, the flexible structure includes a limiting sleeve 19 fixed on the first slide rail 3 through a frame 18, a slide cylinder 20 with one end slidingly disposed in the limiting sleeve 19, and a telescopic member 21 rotatably matched with the slide cylinder 20; The other end of the slide cylinder 20 passes through the end of the limiting sleeve 19 near the center of the beam 1, and one end of the telescopic member 21 also extends from the end of the slide cylinder 20 near the center of the beam 1; One end of the telescopic member 21 extending out of the slide cylinder 20 is fixed to the clamping arm 4 , and a spring 22 is provided between the slide cylinder 20 and the inner wall of the limiting sleeve 19 .

[0050] In this embodiment, after the clamping arm 4 is completely in contact with the accessory, the first slide rail 3 drives the limiting sleeve 19 through the frame 18 to continue to approach the center of the beam 1. At this time, since the clamping arm 4 is already completely in contact with the accessory, the clamping arm 4 will not follow the limiting sleeve 19 and further approach the middle of the beam 1; instead, the spring 22 in the limiting sleeve 19 is compressed by driving the telescopic member 21 and the slide cylinder 20 to telescope relative to the limiting sleeve 19, so that the telescopic member 21 and the slide cylinder 20 remain absolutely still in the length direction of the beam 1; since the spring 22 is compressed, the spring 22 always gives the slide cylinder 20, the telescopic member 21, and the clamping arm 4 an elastic force toward the center of the beam 1, and utilizes this elastic force to maintain the flexible contact between the clamping arm 4 and the accessory, thereby avoiding deformation of the accessory caused by rigid clamping.

[0051] As a further solution of the present invention, the flip structure includes a rotating rod 23 matched with the telescopic member 21, and a guide rail assembly for driving the rotating rod 23 to rotate when the limiting sleeve 19 moves to the end of the stroke close to the center of the beam 1; one end of the rotating rod 23 is in the limiting sleeve 19 and matches with the inside of the telescopic member 21; The other end of the rotating rod 23 passes through the end of the limiting sleeve 19 away from the center of the beam 1, and the rotating rod 23 is rotatably matched with the limiting sleeve 19; A ridge 2301 is integrally provided on a section of the outer wall of the rotating rod 23 extending into the limiting sleeve 19 along its length direction, and a guide groove 2101 slidably matched with the ridge 2301 is provided on the inner wall of the telescopic member 21 facing the rotating rod 23 .

[0052] In this embodiment, since the rotating rod 23 and the limiting sleeve 19 are rotationally matched, when the limiting sleeve 19 moves along the length direction of the beam 1, the rotating rod 23 always moves along the length direction of the beam 1 following the limiting sleeve 19.

[0053] When the clamping arm 4 contacts the accessory, the clamping arm 4, the slide cylinder 20, and the telescopic member 21 will not follow the limiting sleeve 19 to move further toward the middle of the beam 1; while the rotating rod 23 still moves along the length direction of the beam 1 following the limiting sleeve 19; Therefore, during this process, the rotating rod 23 and the telescopic member 21 will maintain relative expansion and contraction; however, under the action of the convex ridge 2301 and the embedded groove 2302, the rotating rod 23 and the telescopic member 21 cannot generate relative rotation.

[0054] At the same time, the guide rail assembly drives the rotating rod 23 to rotate, and the rotating rod 23 drives the telescopic member 21 to rotate accordingly, thereby driving the clamping arm 4 and the accessory clamped thereon to flip.

[0055] As a further solution of the present invention, the guide rail assembly includes a rod sleeve 24 fixed to the clamping seat 2 through a truss 26, a pit is provided on the inner wall of the rod sleeve 24, and a groove 2302 is provided on a section of the outer wall of the rotating rod 23 passing through the limiting sleeve 19; A ball 25 is movably embedded between the embedding groove 2302 and the pit.

[0056] In this embodiment, since the rod sleeve 24 is fixed to the clamping seat 2 by the truss 26, the rod sleeve 24 and the recess thereon are stationary relative to the clamping seat 2; at the same time, the position of the ball 25 embedded in the recess cannot be changed; and when the rotating rod 23 moves relative to the clamping seat 2, the ball 25 is always on the trajectory of the embedding groove 2302. Since the position of the ball 25 cannot be changed, only the embedding groove 2302 moves to correspond to the ball 25.

[0057] As a further solution of the present invention, the embedding groove 2302 includes a straight portion and a spiral portion, the spiral portion is smoothly connected with the straight portion, the straight portion is close to the limiting sleeve 19, and the spiral portion is far away from the limiting sleeve 19; The straight portion is parallel to the axis of the rotating rod 23 .

[0058] In this embodiment, when the rotating rod 23 moves relative to the clamping seat 2 and gets closer to the center of the beam 1, the ball 25 cooperates with the straight portion in advance, and during this process, the rotating rod 23 only moves linearly along the length direction of the beam 1; and when the ball 25 smoothly transitions from the straight portion to the spiral portion, as the rotating rod 23 continues to approach the center of the beam 1, the spiral portion can only maintain its correspondence with the ball 25 by rotating; and the rotation of the spiral portion will drive the rotating rod 23 to rotate, and finally drive the telescopic member 21 and the clamping arm 4 to flip.

[0059] The above embodiments are exemplary rather than restrictive, so the technical solutions of the present invention that can be implemented in other specific forms without departing from the spirit or basic features of the present invention are all included in the present invention.

Claims

1. A clamping tool for assembling automobile parts, comprising a horizontally arranged crossbeam (1), and clamping seats (2) symmetrically arranged on both sides of the crossbeam (1) and movable along the length direction of the crossbeam (1), characterized in that: A first slide rail (3) capable of moving relative to the clamping seat (2) along the length direction of the cross beam (1) is provided on the side of the clamping seat (2) facing away from the cross beam (1), and the first slide rail (3) is connected to the clamping arm (4) via a flexible structure; The clamping seat (2) is also provided with a transmission mechanism, and the transmission mechanism cooperates with the crossbeam (1) and the first slide rail (3); when the clamping seat (2) approaches the center of the crossbeam (1) along the length direction of the crossbeam (1), the transmission mechanism drives the first slide rail (3) to move relative to the clamping seat (2), and makes the first slide rail (3) approach the center of the crossbeam (1) faster than the clamping seat (2); A flipping structure is also provided between the clamping seat (2) and the flexible structure, and when the first slide rail (3) drives the clamping arm (4) to move to the end of its travel close to the center of the beam (1), the flipping structure drives the clamping arm (4) to flip downward.

2. The clamping tool for assembling automobile parts according to claim 1, characterized in that: An electric telescopic mechanism (5) is installed on a side of the crossbeam (1) facing away from the clamping seat (2), and a telescopic end of the electric telescopic mechanism (5) is connected to the clamping seat (2) via a connecting piece (6); The crossbeam (1) is provided with a slide groove (101) through which the connecting member (6) can pass and slide, and a second slide rail (7) is provided on the side of the crossbeam (1) facing the clamping arm (4), the second slide rail (7) is fixed to the crossbeam (1) via a fixed bent foot (8), and the second slide rail (7) is slidably matched with a cavity (202) provided on the clamping seat (2); A sliding channel (201) communicating with the cavity (202) is provided on the clamping seat (2), and the fixed bent foot (8) passes through the sliding channel (201) and slides therewith.

3. The clamping tool for assembling automobile parts according to claim 1, characterized in that: The transmission mechanism comprises a lead screw (16) rotatably arranged on the clamping seat (2), a tooth transmission structure matched with the crossbeam (1), and a differential structure connecting the tooth transmission structure and the lead screw (16); When the clamping seat (2) moves along the length direction of the crossbeam (1), the lead screw (16) is driven to rotate through the tooth transmission structure and the differential structure; A ferrule (17) is fixed on the first slide rail (3), and the ferrule (17) is threadably matched with the lead screw (16).

4. The clamping tool for assembling automobile parts according to claim 3, characterized in that: The tooth transmission structure comprises a tooth plate (9) fixedly arranged on the cross beam (1) along the length direction of the cross beam (1), and a gear (10) arranged on the clamping seat (2) and rotated by a rotating shaft (11); wherein the gear (10) and the tooth plate (9) are meshed with each other; The differential structure comprises an input shaft (13) rotatably disposed on the clamping seat (2) and connected to the rotating shaft (11), a differential (14) installed in the clamping seat (2), and a synchronous belt (15) connecting an output end of the differential (14) and the lead screw (16); The input shaft (13) is connected to the rotating shaft (11) via a transmission belt (12).

5. The clamping tool for assembling automobile parts according to claim 1, characterized in that: The flexible structure comprises a limiting sleeve (19) fixed on the first slide rail (3) via a frame (18), a slide cylinder (20) with one end slidably disposed in the limiting sleeve (19), and a telescopic member (21) rotatably matched with the slide cylinder (20); The other end of the slide cylinder (20) extends out from one end of the limiting sleeve (19) near the center of the cross beam (1), and one end of the telescopic member (21) also extends out from one end of the slide cylinder (20) near the center of the cross beam (1); One end of the telescopic member (21) extending out of the slide cylinder (20) is fixed to the clamping arm (4), and a spring (22) is provided between the slide cylinder (20) and the inner wall of the limiting sleeve (19).

6. The clamping tool for assembling automobile parts according to claim 5, characterized in that: The flip structure comprises a rotating rod (23) matched with the telescopic member (21), and a guide rail assembly for driving the rotating rod (23) to rotate when the limiting sleeve (19) moves to a travel end point close to the center of the crossbeam (1); one end of the rotating rod (23) is located in the limiting sleeve (19) and matched with the interior of the telescopic member (21); The other end of the rotating rod (23) passes through an end of the limiting sleeve (19) away from the center of the crossbeam (1), and the rotating rod (23) and the limiting sleeve (19) are rotatably matched; A ridge (2301) is integrally provided on a section of the outer wall of the rotating rod (23) extending into the limiting sleeve (19) along its length direction, and a guide groove (2101) is provided on an inner wall of the telescopic member (21) facing the rotating rod (23) and is slidably matched with the ridge (2301).

7. The clamping tool for assembling automobile parts according to claim 6, characterized in that: The guide rail assembly comprises a rod sleeve (24) fixed to the clamping seat (2) via a truss (26), a pit being provided on the inner wall of the rod sleeve (24), and an embedding groove (2302) being provided on a section of the outer wall of the rotating rod (23) passing through the limiting sleeve (19); A ball (25) is movably embedded between the embedding groove (2302) and the recess.

8. The clamping tool for assembling automobile parts according to claim 7, characterized in that: The embedding groove (2302) comprises a straight portion and a spiral portion, the spiral portion is smoothly connected to the straight portion, the straight portion is close to the limiting sleeve (19), and the spiral portion is far away from the limiting sleeve (19); The straight portion is parallel to the axis of the rotating rod (23).

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