Back door positioning fixture and back door positioning system

Abstract

The application discloses a back door positioning clamp, which comprises a main frame, a mechanical arm connecting end, a side clamping assembly, a side positioning assembly, a panel adsorption assembly and a door closing assembly which are installed on the main frame; the mechanical arm connecting end is used for connecting with a mechanical arm; the side clamping assembly is slidably installed on one side of the main frame and is used for clamping left and right sides of a back door; the side positioning assembly is slidably installed on the other side of the main frame and is used for positioning the left and right sides of the back door; the panel adsorption assembly is located on the same side of the side clamping assembly and is used for adsorbing an upper part of a panel of the back door; and the door closing assembly is located on the same side of the side positioning assembly and is used for adsorbing a lower part of the panel of the back door and pushing the back door to close. The application further discloses a back door positioning system. The application can realize full-automatic positioning and installation of a back door of a vehicle body, saves manpower and improves work efficiency and precision.

Description

Technical Field

[0001] This invention relates to the technical field of clamps, and more particularly to a tailgate positioning clamp and a tailgate positioning system. Background Technology

[0002] The current assembly of the vehicle's tailgate typically requires three people to work together to install and tighten it, and also requires manual lifting of the door or operation of heavy auxiliary equipment, which presents the following problems:

[0003] 1. Difficult operation: In order to ensure easy hole alignment, two rear door hinge straightening fixtures and two stud hole guide fixtures are required, which makes hole alignment difficult.

[0004] 2. Efficiency: Low work efficiency, long waiting times, and significant waste of time;

[0005] 3. Quality: Manual installation makes it impossible to guarantee the accuracy of hole alignment, the assembly of hinges is prone to stress, and the quality of the rear-end components cannot be guaranteed.

[0006] 4. Fixtures: Five auxiliary fixtures are required for installation. They need to be installed and retrieved manually. At the same time, they require high precision and need to be inspected regularly. It is difficult to ensure the precision.

[0007] Therefore, it is necessary to design a tailgate positioning fixture and tailgate positioning system that can achieve fully automatic positioning and installation of the tailgate of the vehicle. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a tailgate positioning fixture and tailgate positioning system that can achieve fully automatic positioning and installation of the tailgate of a vehicle.

[0009] The technical solution of the present invention provides a rear door positioning clamp, including a main frame, and a robotic arm connecting end, a side clamping assembly, a side positioning assembly, a panel adsorption assembly and a door closing assembly mounted on the main frame;

[0010] The robotic arm connection end is used to connect to the robotic arm;

[0011] The side clamping assembly is slidably mounted on one side of the main frame for clamping the left and right sides of the rear door.

[0012] The side positioning component is slidably mounted on the other side of the main frame for positioning the left and right sides of the rear door.

[0013] The panel adsorption assembly is located on the same side as the side clamping assembly and is used to adsorb the upper part of the panel of the rear door.

[0014] The closing assembly is located on the same side as the side positioning assembly and is used to attract the lower part of the rear door panel and push the rear door to close.

[0015] Furthermore, the side clamping assembly includes a first drive unit, a first slider, a first slide rail, a first support rod, and a ball-head positioning pin. The two ends of the first drive unit are respectively connected to the two first support rods. The first support rods are fixedly connected to the first slider. The first slider slides along the first slide rail. The first slide rail is fixed laterally on the main frame. The ball-head positioning pin is connected to the bottom end of the first support rod. The ball-head positioning pin is used to insert into the positioning holes on the left and right sides of the rear door.

[0016] Furthermore, the first drive unit includes a first drive cylinder, a first drive rod, and a first connecting rod. The first drive cylinder drives the first drive rod to rotate. The two ends of the first drive rod are rotatably connected to one end of the first connecting rod, and the other end of the first connecting rod is rotatably connected to the first support rod.

[0017] Furthermore, the side positioning assembly also includes a second drive unit, a second slider, a second slide rail, a second support rod, and a contour block. The two ends of the second drive unit are respectively connected to the two second support rods. The second support rods are fixedly connected to the second slider. The second slider slides along the second slide rail. The second slide rail is fixed laterally on the main frame. The contour block is connected to the bottom end of the second support rod. The contour block is used to clamp with the left and right sides of the rear door.

[0018] Furthermore, the second drive unit includes a second drive cylinder, a second drive rod, and a second connecting rod. The second drive cylinder drives the second drive rod to rotate. The two ends of the second drive rod are rotatably connected to one end of a second connecting rod, and the other end of the second connecting rod is rotatably connected to the second support rod.

[0019] Furthermore, the panel adsorption assembly includes a third driving cylinder, a third driving rod, a third slider, a third slide rail, and a vacuum adsorption unit. The third driving cylinder is mounted on the main frame and drives the third driving rod to move up and down. The third driving rod is fixedly connected to the third slider. The third slide rail is arranged longitudinally, and the third slider is slidably mounted on the third slide rail. Each end of the third driving rod is connected to a vacuum adsorption unit, which is used to repair the upper part of the rear door panel.

[0020] Furthermore, the vacuum adsorption unit includes a fourth cylinder, a telescopic rod, an extension rod, and a first suction cup. The fourth cylinder is used to drive the telescopic rod to move up and down. The telescopic rod is connected to the extension rod, and the extension rod is connected to the first suction cup.

[0021] Furthermore, the panel adsorption assembly also includes a limiting rod that extends longitudinally and is used to contact the panel of the rear door.

[0022] Furthermore, the closing assembly includes a transfer bracket, a fifth cylinder, a connecting plate, and a second suction cup. The transfer bracket is connected between the main frame and the fifth cylinder. The fifth cylinder can drive the connecting plate to perform telescopic movements. Two second suction cups are connected to the connecting plate. The second suction cups are used to adhere to the lower part of the rear door panel.

[0023] The present invention also provides a rear door positioning system, including a robotic arm and a rear door positioning fixture as described in any of the above claims. The robotic arm is connected to the main frame via a robotic arm connecting end, and the robotic arm is used to drive the movement of the rear door positioning fixture.

[0024] The above technical solution has the following beneficial effects:

[0025] This invention uses a side clamping assembly and a side positioning assembly to clamp and position the tailgate, while a panel adsorption assembly restricts the tailgate's displacement. After the tailgate is installed with the vehicle body, a closing assembly adsorbs the tailgate and actuates it to close. This invention enables fully automated positioning and installation of the tailgate, saving manpower and improving work efficiency and accuracy. Attached Figure Description

[0026] The disclosure of this invention will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings:

[0027] Figure 1 This is a perspective view of a rear door positioning clamp according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of a side clamping assembly in one embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of a side positioning component in one embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of a panel adsorption assembly in one embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of a door closing component in one embodiment of the present invention.

[0032] Appendix Label Reference Table:

[0033] Main frame 1, robotic arm connection end 2, detection component 7;

[0034] Side clamping assembly 3: First drive unit 31, first slider 32, first slide rail 33, first support rod 34, ball head positioning pin 35, first drive cylinder 311, first drive rod 312, first connecting rod 313, first drive frame 314;

[0035] Side positioning assembly 4: second drive unit 41, second slider 42, second slide rail 43, second support rod 44, contour block 45, second drive cylinder 411, second drive rod 412, second connecting rod 413, second drive frame 414;

[0036] Panel adsorption assembly 5: third drive cylinder 51, third drive rod 52, third slider 53, third slide rail 54, vacuum adsorption unit 55, limit rod 56, fixing frame 57, fourth cylinder 551, telescopic rod 552, extension rod 553, first suction cup 554.

[0037] Door closing assembly 6: adapter bracket 61, fifth cylinder 62, connecting plate 63, second suction cup 64. Detailed Implementation

[0038] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0039] It is readily understood that, based on the technical solution of this invention, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of the invention.

[0040] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0041] In some embodiments of the present invention, such as Figure 1-2 As shown, the rear door positioning fixture includes a main frame 1, and a robotic arm connecting end 2, a side clamping assembly 3, a side positioning assembly 4, a panel adsorption assembly 5, and a door closing assembly 6 mounted on the main frame 1.

[0042] The robotic arm connection end 2 is used to connect to the robotic arm;

[0043] The side clamping assembly 3 is slidably mounted on one side of the main frame 1 for clamping the left and right sides of the rear door.

[0044] The side positioning component 4 is slidably mounted on the other side of the main frame 1 for positioning the left and right sides of the tailgate.

[0045] The panel adsorption component 5 is located on the same side as the side clamping component 3 and is used to adsorb the upper part of the rear door panel.

[0046] The closing assembly 6 is located on the same side as the side positioning assembly 4, and is used to attract the lower part of the rear door panel and push the rear door to close.

[0047] Specifically, such as Figure 1 As shown, the main frame 1 is a rectangular frame structure. Figure 3 As shown, the robotic arm connecting end 2 is installed on one side of the main frame 1. The robotic arm (not shown) is connected to the robotic arm connecting end 2 and is used to move the entire tailgate positioning fixture. The robotic arm can move the tailgate positioning fixture to the position of the tailgate (not shown). After the tailgate positioning fixture positions and clamps the tailgate, the robotic arm pushes the tailgate to close. After the tailgate is installed, the robotic arm moves the tailgate positioning fixture away to prepare for the positioning and installation of the next tailgate.

[0048] like Figure 1 As shown, the side clamping assembly 3 is slidably mounted on one side of the main frame 1 for clamping the left and right sides of the rear door.

[0049] The side positioning component 4 is slidably mounted on the other side of the main frame 1 for positioning the left and right sides of the tailgate.

[0050] The side clamping assembly 3 and the side positioning assembly 4 can respectively position and clamp the left and right sides of different parts of the tailgate, ensuring the stability of the tailgate during installation.

[0051] The panel adsorption assembly 5 is located on the same side as the side clamping assembly 3 and is used to adsorb the upper part of the rear door panel. The panel adsorption assembly 5 simulates a worker's hands to position the rear door panel and, together with the side clamping assembly 3 and the side positioning assembly 4, maintains the stability of the rear door during the installation process.

[0052] The closing assembly 6 is located on the same side as the side positioning assembly 4. It is used to attach to the lower part of the tailgate panel and push the tailgate to close. After the tailgate is installed, the closing assembly 6 attaches to the lower part of the tailgate panel, simulating a worker's hands to close the tailgate.

[0053] This embodiment enables fully automated positioning and installation of the vehicle's rear door, saving manpower and improving work efficiency and accuracy.

[0054] Furthermore, such as Figure 2As shown, the side clamping assembly 3 includes a first drive unit 31, a first slider 32, a first slide rail 33, a first support rod 34, and a ball-head positioning pin 35. The two ends of the first drive unit 31 are respectively connected to two first support rods 34. The first support rods 34 are fixedly connected to the first slider 32. The first slider 32 slides along the first slide rail 33. The first slide rail 33 is fixed laterally on the main frame 1. The ball-head positioning pin 35 is connected to the bottom end of the first support rod 34. The ball-head positioning pin 35 is used to insert into the positioning holes on the left and right sides of the rear door.

[0055] Specifically, a first slide rail 33 is fixedly installed at each end of one side of the main frame 1. The first slider 32 can slide along the first slide rail 33. The two first sliders 32 are each fixedly connected to the upper end of a first support rod 34. The bottom end of the first support rod 34 is connected to a ball head positioning pin 35. The two ball head positioning pins 35 extend toward each other.

[0056] The first drive unit 31 is installed in the middle of one side of the main frame 1. Both ends of the first drive unit 31 are connected to two first support rods 34 respectively. The first drive unit 31 can simultaneously drive the two first support rods 34 to move towards each other or away from each other. When the two first support rods 34 move towards each other, they clamp the left and right sides of the tailgate. Each side of the tailgate has a positioning hole, into which a ball-head positioning pin 35 is inserted to clamp the tailgate. When the two first support rods 34 move away from each other, they release the tailgate.

[0057] Furthermore, such as Figure 2 As shown, the first drive unit 31 includes a first drive cylinder 311, a first drive rod 312 and a first connecting rod 313. The first drive cylinder 311 drives the first drive rod 312 to rotate. The two ends of the first drive rod 312 are rotatably connected to one end of a first connecting rod 313, and the other end of the first connecting rod 313 is rotatably connected to the first support rod 34.

[0058] Specifically, the first drive cylinder 311 is mounted on the main frame 1, and the cylinder rod of the first drive cylinder 311 is rotatably connected to the first drive rod 312. The first drive unit 31 also includes a first drive frame 314, which is fixedly mounted on the main frame 1. The rotation center of the first drive rod 312 is rotatably connected to the first drive frame 314, and both ends of the first drive rod 312 are rotatably connected to the first connecting rod 313. When the first drive cylinder 311 drives the cylinder rod to perform a telescopic movement, it pushes the first drive rod 312 to rotate. The first drive rod 312 simultaneously drives the two first connecting rods 313 to move laterally. The two first connecting rods 313 move towards each other or away from each other, and the first connecting rods 313 drive the first support rod 34 to move horizontally.

[0059] Furthermore, such as Figure 3 As shown, the side positioning assembly 4 also includes a second drive unit 41, a second slider 42, a second slide rail 43, a second support rod 44, and a contour block 45. The two ends of the second drive unit 41 are respectively connected to two second support rods 44. The second support rods 44 are fixedly connected to the second slider 42. The second slider 42 slides along the second slide rail 43. The second slide rail 43 is fixed laterally on the main frame 1. The contour block 45 is connected to the bottom end of the second support rod 44. The contour block 45 is used to clamp with the left and right sides of the rear door.

[0060] Specifically, a second slide rail 43 is fixedly installed at both ends of one side of the main frame 1. The second slider 42 can slide along the second slide rail 43. The upper end of a second support rod 44 is fixedly connected to each of the two second sliders 42. The bottom end of the second support rod 44 is connected to a contour block 45. The two contour blocks 45 extend toward each other.

[0061] The second drive unit 41 is installed in the middle of one side of the main frame 1. Both ends of the second drive unit 41 are connected to two second support rods 44 respectively. The second drive unit 41 can simultaneously drive the two second support rods 44 to move towards each other or away from each other. When the two second support rods 44 move towards each other, the contour block 45 clamps the left and right sides of the tailgate. When the two second support rods 44 move away from each other, they release the tailgate.

[0062] The contour block 45 is provided with a contour groove. The shape of the contour groove is designed according to the position of the corresponding rear door, so that the two contour blocks 45 can contact and clamp with the left and right sides of the rear door.

[0063] Furthermore, such as Figure 3As shown, the second drive unit 41 includes a second drive cylinder 411, a second drive rod 412, and a second connecting rod 413. The second drive cylinder 411 drives the second drive rod 412 to rotate. The two ends of the second drive rod 412 are rotatably connected to one end of a second connecting rod 413, and the other end of the second connecting rod 413 is rotatably connected to the second support rod 44.

[0064] Specifically, the second drive cylinder 411 is mounted on the main frame 1, and the cylinder rod of the second drive cylinder 411 is rotatably connected to the second drive rod 412. The second drive unit 41 also includes a second drive frame 414, which is fixedly mounted on the main frame 1. The rotation center of the second drive rod 412 is rotatably connected to the second drive frame 414, and both ends of the second drive rod 412 are rotatably connected to the second connecting rod 413. When the second drive cylinder 411 drives the cylinder rod to perform a telescopic movement, it pushes the second drive rod 412 to rotate. The second drive rod 412 simultaneously drives the two second connecting rods 413 to move laterally. The two second connecting rods 413 move towards each other or away from each other, and the second connecting rods 413 drive the second support rod 44 to move horizontally.

[0065] Furthermore, such as Figure 4 As shown, the panel adsorption assembly 5 includes a third driving cylinder 51, a third driving rod 52, a third slider 53, a third slide rail 54, and a vacuum adsorption unit 55. The third driving cylinder 51 is mounted on the main frame 1. The third driving cylinder 51 drives the third driving rod 52 to move up and down. The third driving rod 52 is fixedly connected to the third slider 53. The third slide rail 54 is arranged longitudinally. The third slider 53 is slidably mounted on the third slide rail 54. Each end of the third driving rod 52 is connected to a vacuum adsorption unit 55. The vacuum adsorption unit 55 is used to repair the upper part of the rear door panel.

[0066] Specifically, a fixed frame 57 is fixedly connected to the main frame 1. A third drive cylinder 51 is mounted on the fixed frame 57 and is fixedly connected to a third drive rod 52, enabling the third drive rod 52 to move up and down. The third drive rod 52 is arranged laterally, and the third drive cylinder 51 is connected to the center of the third drive rod 52. Two vacuum adsorption units 55 are respectively installed at the left and right ends of the third drive rod 52. A third slider 53 is connected to the middle section of each of the left and right sides of the third drive rod 52. A third slide rail 54 is fixedly connected to the fixed frame 57 and is arranged longitudinally.

[0067] When the third drive cylinder 51 is driven, it drives the third drive rod 52 to move up and down. The third drive rod 52 drives the third slider 53 to slide along the third slide rail 54. The third drive rod 52 also drives the two vacuum adsorption units 55 to move up and down.

[0068] When the vacuum adsorption unit 55 moves downward, it moves to the position closest to the rear door, but at this time it does not adsorb the rear door; when the vacuum adsorption unit 55 moves upward, it separates from the rear door.

[0069] Furthermore, such as Figure 4 As shown, the vacuum adsorption unit 55 includes a fourth cylinder 551, a telescopic rod 552, an extension rod 553, and a first suction cup 554. The fourth cylinder 551 is used to drive the telescopic rod 552 to move up and down. The telescopic rod 552 is connected to the extension rod 553, and the extension rod 553 is connected to the first suction cup 554.

[0070] Specifically, the fourth cylinder 551 can drive the telescopic rod 552 to extend and retract up and down, and the telescopic rod 552 drives the first suction cup 554 to extend and retract up and down through the extension rod 553.

[0071] The vertical extension range of the telescopic rod 552 is smaller than that of the third drive rod 52. The third drive rod 52 is used to move the first suction cup 554 to a position where it is in contact with the rear door panel, but at this time the first suction cup 554 does not adhere to the rear door. When the telescopic rod 552 extends, it causes the first suction cup 554 to press against the rear door; when the telescopic rod 552 retracts, the first suction cup 554 adheres to the rear door.

[0072] Furthermore, such as Figure 4 As shown, the panel adsorption assembly 5 also includes a limiting rod 56, which extends longitudinally and is used to contact the panel of the rear door.

[0073] When the first suction cup 554 adheres to the tailgate, the bottom of the limiting rod 56 contacts the tailgate panel. When the third drive cylinder 51 drives the third drive rod 52 to move upward, the limiting rod 56 is used to prevent the tailgate from being lifted by the first suction cup 554. After the first suction cup 554 moves upward together with the third drive rod 52, the first suction cup 554 separates from the tailgate.

[0074] Furthermore, such as Figure 5 As shown, the door closing assembly 6 includes a transition bracket 61, a fifth cylinder 62, a connecting plate 63, and a second suction cup 64. The transition bracket 61 is connected between the main frame 1 and the fifth cylinder 62. The fifth cylinder 62 can drive the connecting plate 63 to perform telescopic movements. Two second suction cups 64 are connected to the connecting plate 63. The second suction cups 64 are used to adsorb the lower part of the rear door panel.

[0075] Specifically, the adapter bracket 61 extends the door closing assembly 6 outward, and the fifth cylinder 62 is arranged at an angle at the bottom of the adapter bracket 61. The fifth cylinder 62 is connected to the second suction cup 64 through the connecting plate 63. Each end of the connecting plate 63 is connected to a second suction cup 64, which is used to suction the lower part of the rear door panel.

[0076] When the side clamping assembly 3 and the side positioning assembly 4 are clamped and positioned with the tailgate, the second suction cup 64 only moves closer to the tailgate and does not yet adhere to it. After the tailgate is installed with the vehicle body, the fifth cylinder 62 drives the second suction cup 64 to adhere to the tailgate. Subsequently, the robotic arm rotates the entire tailgate positioning fixture to close the tailgate.

[0077] Better, such as Figure 1 As shown, the rear door positioning fixture also includes a detection component 7, which is installed in the middle of the main frame 1. The detection component 7 is equipped with a 3D structured light camera to obtain the real-time orientation of the rear door positioning fixture, so as to accurately locate and grasp the rear door.

[0078] The tailgate positioning and clamping mechanism in this embodiment requires no manual intervention, enabling the tailgate to be clamped and positioned, and the door to close automatically after installation. This saves labor, improves work efficiency, and enhances positioning accuracy.

[0079] In another embodiment of the present invention, the rear door positioning system includes a robotic arm and a rear door positioning fixture as described in any of the above embodiments. The robotic arm is connected to the main frame 1 via a robotic arm connecting end 2, and the robotic arm is used to drive the movement of the rear door positioning fixture.

[0080] The above description is merely the principle and preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several other modifications can be made based on the principle of the present invention, and these modifications should also be considered within the scope of protection of the present invention.

Claims

1. A tailgate positioning clamp, characterized in that, It includes a main frame, and a robotic arm connection end, a side clamping assembly, a side positioning assembly, a panel adsorption assembly, and a door closing assembly mounted on the main frame; The robotic arm connection end is used to connect to the robotic arm; The side clamping assembly is slidably mounted on one side of the main frame for clamping the left and right sides of the rear door. The side positioning component is slidably mounted on the other side of the main frame for positioning the left and right sides of the rear door. The panel adsorption assembly is located on the same side as the side clamping assembly and is used to adsorb the upper part of the panel of the rear door. The closing assembly is located on the same side as the side positioning assembly and is used to adsorb the lower part of the tailgate panel and push the tailgate to close. The closing assembly includes an adapter bracket, a fifth cylinder, a connecting plate, and a second suction cup. The adapter bracket is connected between the main frame and the fifth cylinder. The fifth cylinder can drive the connecting plate to perform telescopic movement. Two second suction cups are connected to the connecting plate. The second suction cups are used to adsorb the lower part of the tailgate panel. After the tailgate is installed with the vehicle body, the fifth cylinder drives the second suction cups to adsorb the tailgate. Then, the robotic arm drives the entire tailgate positioning fixture to flip and close the tailgate.

2. The rear door positioning clamp according to claim 1, characterized in that, The side clamping assembly includes a first drive unit, a first slider, a first slide rail, a first support rod, and a ball-head positioning pin. The two ends of the first drive unit are respectively connected to the two first support rods. The first support rods are fixedly connected to the first slider. The first slider slides along the first slide rail. The first slide rail is fixed laterally on the main frame. The ball-head positioning pin is connected to the bottom end of the first support rod. The ball-head positioning pin is used to insert into the positioning holes on the left and right sides of the rear door.

3. The tailgate positioning clamp according to claim 2, characterized in that, The first drive unit includes a first drive cylinder, a first drive rod, and a first connecting rod. The first drive cylinder drives the first drive rod to rotate. The two ends of the first drive rod are rotatably connected to one end of the first connecting rod, and the other end of the first connecting rod is rotatably connected to the first support rod.

4. The tailgate positioning clamp according to claim 1, characterized in that, The side positioning assembly further includes a second drive unit, a second slider, a second slide rail, a second support rod, and a contour block. The two ends of the second drive unit are respectively connected to the two second support rods. The second support rods are fixedly connected to the second slider. The second slider slides along the second slide rail. The second slide rail is fixed laterally on the main frame. The contour block is connected to the bottom end of the second support rod. The contour block is used to clamp with the left and right sides of the rear door.

5. The tailgate positioning clamp according to claim 4, characterized in that, The second drive unit includes a second drive cylinder, a second drive rod, and a second connecting rod. The second drive cylinder drives the second drive rod to rotate. The two ends of the second drive rod are rotatably connected to one end of a second connecting rod, and the other end of the second connecting rod is rotatably connected to the second support rod.

6. The tailgate positioning clamp according to claim 1, characterized in that, The panel adsorption assembly includes a third driving cylinder, a third driving rod, a third slider, a third slide rail, and a vacuum adsorption unit. The third driving cylinder is mounted on the main frame and drives the third driving rod to move up and down. The third driving rod is fixedly connected to the third slider. The third slide rail is arranged longitudinally, and the third slider is slidably mounted on the third slide rail. Each end of the third driving rod is connected to a vacuum adsorption unit, which is used to repair the upper part of the rear door panel.

7. The tailgate positioning clamp according to claim 6, characterized in that, The vacuum adsorption unit includes a fourth cylinder, a telescopic rod, an extension rod, and a first suction cup. The fourth cylinder is used to drive the telescopic rod to move up and down. The telescopic rod is connected to the extension rod, and the extension rod is connected to the first suction cup.

8. The tailgate positioning clamp according to claim 7, characterized in that, The panel adsorption assembly also includes a limiting rod that extends longitudinally and is used to contact the panel of the rear door.

9. A tailgate positioning system, comprising a robotic arm, characterized in that, It also includes the rear door positioning fixture as described in any one of claims 1-8, wherein the robotic arm is connected to the main frame via the robotic arm connecting end, and the robotic arm is used to drive the movement of the rear door positioning fixture.

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