A lifting mechanism for spraying a back door of an automobile

Abstract

This application relates to the technical field of lifting equipment, providing a lifting mechanism for painting automotive tailgates. The mechanism includes a base, a boom, a lifting drive device, and a counter-positioning device. The boom and lifting drive device achieve stable lifting of the automotive tailgate, while the counter-positioning device provides additional support and positioning, ensuring the tailgate's stability during painting. Furthermore, the boom employs a multi-arm structure and is equipped with locking components for angle adjustment. The bottom frame is equipped with a tensioning device and tension sensor to optimize the tension on the pull ropes, further improving lifting accuracy and safety. This application achieves the technical effect of improving the stability, accuracy, and ease of operation of automotive tailgate lifting, providing reliable support for painting processes.

Description

Technical Field

[0001] This application relates to the technical field of lifting equipment, and in particular to a hoisting mechanism for painting automotive tailgates. Background Technology

[0002] During automobile production, body parts such as tailgates need to be painted to achieve effects such as corrosion resistance and aesthetics. Production lines typically integrate lifting mechanisms to hoist and secure tailgates, facilitating the painting system's application of the paint.

[0003] A typical lifting mechanism consists of several key components: a lifting arm, a clamping system, and a motion control system. The lifting arm is used to lift and transport the car tailgate, and its design must consider sufficient strength and flexibility to accommodate tailgates of different sizes and weights. The clamping system is specifically designed to firmly hold the tailgate, preventing displacement or falling during the painting process, while also avoiding damage to the tailgate's surface. The motion control system includes components such as motors, drives, and controllers, responsible for precisely controlling the movement of the lifting arm and clamping system, transporting the car tailgate to the designated painting area.

[0004] When the clamp is holding the tailgate of a car, the clamp is in direct contact with the outer arm of the tailgate. Because the clamp blocks part of the tailgate, these areas cannot receive the spraying material, resulting in discontinuous coating and the problem of spraying dead corners in the clamped area. Summary of the Invention

[0005] To reduce blind spots during the painting process, this application provides a lifting mechanism for painting automotive tailgates.

[0006] This application provides a lifting mechanism for painting automotive tailgates, employing the following technical solution: A lifting mechanism for painting automotive tailgates includes: Base A boom is connected to the base, and a hook is provided at one end of the boom; The lifting drive device includes a lifting rope, a first guide wheel, and a lifting rope retractor. Several first guide wheels are spaced apart along the length of the boom and are rotatably connected to the boom. One end of the lifting rope is connected to the lifting rope retractor, and the other end passes sequentially around each of the first guide wheels and is detachably connected to the tailgate of a vehicle. The lifting rope retractor is mounted on the base and is used to drive the lifting rope to move. The pull positioning device includes a bottom frame, a pull rope, a second guide wheel, and a pull rope retractor. The bottom frame is connected to the bottom of the base. Several second guide wheels are spaced apart along the length of the bottom frame and are rotatably connected to the bottom frame. One end of the pull rope is connected to the pull rope retractor, and the other end passes around each of the second guide wheels and is detachably connected to the tailgate of the car. The pull rope retractor is disposed on the base and is used to drive the pull rope to move.

[0007] By adopting the above technical solution, a bidirectional traction system is formed through the cooperation of the lifting drive device and the pull positioning device. The flexible connection of the lifting rope and pull rope replaces the traditional rigid clamps, greatly reducing the contact area with the back door and ensuring that the connected parts only have line contact rather than surface obstruction. The tension of the pull rope and lifting rope is precisely controlled by the lifting rope and pull rope retractors, ensuring stability while exposing most of the back door surface without obstruction, significantly improving the problem of spraying dead angles caused by clamp obstruction.

[0008] Optionally, it also includes a lifting connection assembly, which includes a lifting ring, a pull ring, and a clearance bar. The pull ring is located at one end of the vehicle tailgate, the clearance bar is located at the other end of the vehicle tailgate, and the lifting ring is connected to one end of the clearance bar.

[0009] By adopting the above technical solution, the lifting ring provides a connection point for the lifting rope to be attached to the tailgate of the car. The combined connection structure of the lifting ring and the avoidance bar, through the extension of the avoidance bar, maintains a distance between the lifting connection point and the tailgate surface. This creates physical clearance space during spraying, ensuring that the lifting ring connection point does not form a projected obstruction area on the tailgate surface, further eliminating blind spots in the spraying of corner areas. At the same time, the pull ring is provided for the connection of the pull rope, facilitating the coordination of the pull positioning device and the lifting drive device to stably fix the tailgate of the car, improving the safety and stability during the lifting process.

[0010] Optionally, the boom includes a first arm, a second arm, and a first locking member, wherein the first arm is connected to the base, and the hook is connected to one end of the second arm; The second arm is rotatably connected to the arm segment of the first arm, and the first locking member is used to lock the position of the second arm after rotation.

[0011] By adopting the above technical solution, the boom consists of a first arm, a second arm, and a first locking element, making the boom adjustable. The second arm can rotate relative to the first arm and is fixed in the desired position by the first locking element, thereby achieving precise positioning of the car tailgate. It adapts to car tailgates of different sizes and weights and also improves the utilization rate of the working space.

[0012] Optionally, one end of the first arm is fixed with a locking groove, and the first locking element includes a locking pin; the arm segment of the second arm is located in the locking groove, and the locking pin passes through the locking groove and the second arm.

[0013] By adopting the above technical solution, the position of the second boom after rotation is locked by the insertion of a locking pin, thereby ensuring the stability of the lifting mechanism in the working state. This improves the flexibility of the boom and enhances its safety in actual operation, avoiding accidents caused by the second boom moving again after adjustment.

[0014] Optionally, the bottom support includes a horizontal guide rail and a horizontal support slidably disposed on the horizontal guide rail. A drive source is disposed on the horizontal guide rail, and the drive source is used to drive the horizontal support to slide. The horizontal guide rail is fixedly connected to the base, and the second guide wheel is rotatably mounted on the horizontal support platform.

[0015] By adopting the above technical solution, the horizontal guide rail is fixedly connected to the base, ensuring the stability of the bottom frame structure. Simultaneously, the horizontal support platform is slidably mounted on the horizontal guide rail. Driven by the drive source, the sliding of the horizontal support platform allows for flexible adjustment of the position of the second guide wheel. This enables precise control of the force direction and angle of the pull rope, thereby better adjusting the posture of the car tailgate and reducing blind spots during painting. Furthermore, the second guide wheel's rotational mounting on the horizontal support platform provides guidance for the movement of the pull rope, reduces frictional resistance during rope movement, and improves the overall operating efficiency and stability of the lifting mechanism.

[0016] Optionally, a tensioning device is provided on the bottom frame, and a tension sensor is provided on the pull rope; The tensioning device includes a tensioning bracket, a lifting source, and a tensioning wheel slidably mounted on the tensioning bracket. The lifting source is used to drive the tensioning wheel to rise and fall. The tension rope is wound around the tensioning wheel. The tension sensor is electrically connected to the lifting source.

[0017] By adopting the above technical solution, the tensioning wheel can dynamically adjust the tension of the pull rope by raising and lowering it under the action of the lifting source, avoiding positioning problems and stability issues of the car tailgate caused by the pull rope being too loose or too tight. At the same time, the combined use of the tension sensor and the lifting source enables automatic monitoring and adjustment of the pull rope tension, further improving the reliability and accuracy of the tensioning device.

[0018] Optionally, the second arm includes a first rotating arm segment and a second rotating arm segment rotatably connected to one end of the first rotating arm segment. One end of the first rotating arm segment is rotatably connected to the first arm, and the rotation axis of the first rotating arm segment is perpendicular to the rotation axis of the second rotating arm segment. The second arm is also equipped with a second locking member, which locks the position of the second rotating arm segment after it has rotated.

[0019] By adopting the above technical solution, the rotational connection between the first and second rotating arm sections, and the design of their perpendicular rotation axes, further improves the adjustment range, enabling flexible adjustment of the boom in space. This allows the lifted car tailgate to be rotated to different angles to adjust its lifting state, meeting the all-around painting requirements of the car tailgate and ensuring it maintains its optimal posture during painting, further reducing painting blind spots. The second locking component locks the position of the second rotating arm section, ensuring stability after adjustment and preventing quality problems caused by positional changes during painting.

[0020] Optionally, one end of the first rotating arm segment is provided with a snap-fit ​​groove, and the second rotating arm segment is provided with a snap-fit ​​part, the snap-fit ​​part being located within the snap-fit ​​groove; the second arm also includes a hinge pin, the hinge pin passing through the snap-fit ​​groove and the snap-fit ​​part; the second locking element is specifically a locking nut, the locking nut being threadedly connected to the hinge pin.

[0021] By adopting the above technical solution, the locking part of the second rotating arm segment is locked into the locking groove of the second rotating arm segment and fixed by a hinge pin, ensuring the rotational connection between the first and second rotating arm segments. Simultaneously, the second locking element is set as a locking nut, which, through a threaded connection with the hinge pin, causes the locking groove and the locking part to abut against each other, thereby locking the position of the second rotating arm segment. This effectively prevents the second rotating arm segment from loosening or shifting due to vibration or other external forces during the painting process, thus ensuring the stability of the car tailgate during hoisting.

[0022] Optionally, the hook may be specifically configured as an anti-detachment hook.

[0023] By adopting the above technical solutions, the anti-detachment hook can effectively prevent the tailgate of a car from falling off during lifting and transportation, improving operational safety. It enhances the stability of the lifting process, avoiding equipment damage or personal injury caused by accidental detachment, while ensuring the smooth progress of the painting operation.

[0024] In summary, this application includes at least one of the following beneficial effects: 1. In this application, the coordinated action of the lifting drive device and the pull positioning device enables stable suspension and precise spatial positioning of the car tailgate, effectively avoiding the problem of paint obstruction caused by direct contact of traditional clamps with the outer surface of the tailgate, thereby reducing paint dead angles; 2. The lifting rope and the pull rope in this application are guided by the first guide wheel and the second guide wheel, respectively, to ensure that the car tailgate is subjected to uniform force during lifting and fixing, to prevent displacement or shaking, and to improve the stability of the spraying operation; 3. This application provides flexible adjustment capabilities through the combined design of the base, boom, and bottom frame, adapting to car tailgates of different sizes and weights, thus enhancing the versatility and applicability of the equipment; 4. The rotating connection structure between the first rotating boom segment and the second rotating boom segment within the second boom in this application, combined with the second locking member, allows for adjustment of the boom angle and position according to actual needs, further optimizing the convenience of the spraying operation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the hoisting mechanism for painting the tailgate of a car, as shown in Embodiment 1 of this application. Figure 2 This is a schematic diagram of the overall structure of the hoisting mechanism for painting the tailgate of a car, as shown in Embodiment 2 of this application. Figure 3 This is a side view of the hoisting mechanism for painting the tailgate of a car, as shown in Embodiment 2 of this application. Figure 4 This is a schematic diagram of the structure of the second arm in Embodiment 2 of this application; Explanation of reference numerals in the attached drawings: 1. Base; 2. Boom; 21. First boom; 22. Second boom; 221. First rotating boom section; 2211. Snap-fit ​​groove; 222. Second rotating boom section; 2221. Snap-fit ​​part; 223. Locking nut; 23. Hinge pin; 24. Locking pin; 25. Locking groove; 251. Locking channel; 3. Anti-detachment hook; 4. Lifting drive device; 41. Lifting rope; 42. First guide pulley; 43. Hoisting rope retractor; 5. Pull-out positioning device; 51. Bottom frame; 511. Horizontal guide rail; 512. Horizontal support platform; 52. Pull rope; 53. Second guide wheel; 54. Pull rope retractor; 55. Drive source; 6. Hoisting connection assembly; 61. Lifting ring; 62. Pull ring; 63. Clearance bar; 7. Tensioning device; 71. Tensioning bracket; 72. Lifting source; 73. Tensioning wheel; 8. Tension sensor; 9. Car tailgate. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 -Appendix Figure 4 This application will be described in further detail.

[0027] Example 1: Reference Figure 1The lifting mechanism for automotive tailgate painting provided in this application includes a base 1, a boom 2, a lifting drive device 4, and a lifting connection assembly 6. The boom 2 includes a first arm 21, a second arm 22, and a first locking element. The first arm 21 is connected to the base 1, and the second arm 22 is rotatably connected to the arm segment of the first arm 21. The first arm 21 is welded and fixed to the base 1, and can be made of materials such as stainless steel or aluminum alloy. The second arm 22 can be made of the same material as the first arm 21, and one end of the second arm 22 is rotatably connected to the arm segment of the first arm 21 via a hinge support or other components. A hook is fixed to the end of the second arm 22 away from its rotating end. The hook is specifically an anti-detachment hook 3 with a spring-loaded locking tongue, requiring a certain external force to unlock in the locked state.

[0028] Reference Figure 1 The first arm 21, at its end furthest from the base 1, is fixed with a locking groove 25, and the first locking element is specifically a locking pin 24. The locking groove 25 can be welded from steel plates, and the inner wall of the locking groove 25 can be ground to ensure smoothness. The locking pin 24 can be made of alloy steel. A locking channel 251 is provided on the locking groove 25. When the second arm 22 rotates to be parallel with the first arm 21, part of the arm of the second arm 22 is located in the locking groove 25. At this time, the boom 2 is in a fully extended state; by using the locking pin 24 to pass through the locking channel 251 onto the second arm 22, the second arm 22 can be locked. By removing the locking pin 24, the second arm 22 can be rotated to different states.

[0029] In other embodiments, for ease of operation, the end of the locking pin 24 may be provided with a handle or wrench interface, allowing operators to quickly lock or unlock it. In other embodiments, multiple locking channels 251 may be spaced around the rotation axis of the second arm 22 on the locking groove 25, facilitating locking in different states of the second arm 22 after rotation, to accommodate more usage states.

[0030] Reference Figure 1 The lifting drive device 4 includes a lifting rope 41, a first guide wheel 42, and a lifting rope retractor 43. Multiple first guide wheels 42 are spaced apart along the length of the boom 2, and the specific number can be selected according to requirements. In this embodiment, two first guide wheels 42 are specifically provided: one first guide wheel 42 is rotatably connected to the first support arm 21, and the other second guide wheel 42 is rotatably connected to the second support arm 22. The lifting rope retractor 43 is fixed to the upper end of the base 1. In use, one end of the lifting rope 41 is connected to the lifting rope retractor 43, and the other end passes sequentially around each of the first guide wheels 42 and is detachably connected to the car tailgate 9.

[0031] The lifting rope 41 is made of steel wire rope, which has good tensile strength and wear resistance. In practical applications, steel wire ropes of different diameters can be selected according to the load weight, and nylon rope or other synthetic fiber materials can also be used as substitutes. The first guide pulley 42 can be made of cast iron or stainless steel, and the surface is precision machined to reduce frictional resistance and extend service life. The lifting rope retractor 43 is specifically selected from electric hoists.

[0032] Reference Figure 1 The lifting connection assembly 6 includes a lifting ring 61, a pull ring 62, and a clearance bar 63. The clearance bar 63 is fixed to the tailgate 9 of the vehicle, and the lifting ring 61 is rotatably connected to one end of the clearance bar 63; when lifting the tailgate 9, the lifting rope 41 can be tied to the lifting ring 61. The pull ring 62 is rotatably connected to the end of the tailgate 9 away from the clearance bar 63, and the pull ring 62 and the clearance bar 63 are arranged on the same side. In this embodiment, two pull rings 62 are arranged at intervals.

[0033] In other embodiments, multiple clearance bars 63 may also be provided, so that the pull ring 62 is also connected to the tailgate 9 of the car via the clearance bars 63.

[0034] Both the lifting ring 61 and the pull ring 62 can be made of stainless steel or aluminum alloy, offering high strength and corrosion resistance. The clearance bar 63 can be made of lightweight aluminum alloy or carbon fiber composite material to reduce overall weight. To avoid stress concentration, the connection between the lifting ring 61 and the clearance bar 63 needs to be rounded and reinforced with ribs to improve structural strength. Furthermore, rubber pads can be added to the lifting ring 61 and the pull ring 62 to cushion shocks and prevent scratches on the back door surface.

[0035] The fixing method of the back door is further optimized by using the hoisting connection component 6, which reduces the direct contact area with the hoisting mechanism.

[0036] The implementation principle of the lifting mechanism for painting a car tailgate according to Embodiment 1 of this application is as follows: After rotating the second arm 22 to be parallel with the first arm 21, a locking pin 24 is inserted into the locking groove 25 and the second arm 22 to lock the second arm 22. The end of the lifting rope 41 away from the rope retractor 43 is tied to the lifting ring 61 of the car tailgate 9, and then the rope retractor 43 is activated to drive the rope 41 to lift the car tailgate 9. After the car tailgate 9 is lifted to a certain height, the lifting ring 61 is suspended from the hook. By fixing the car tailgate 9 with fixed components, the car tailgate 9 can be painted.

[0037] Example 2: The difference between this embodiment and embodiment 1 is that this embodiment adds a counter-positioning device 5 and a tensioning device 7, and the second support arm 22 in this embodiment is configured as two parts that are rotatably connected.

[0038] Reference Figure 2 and Figure 3 The pull positioning device 5 includes a bottom frame 51, a pull rope 52, a second guide wheel 53, and a pull rope retractor 54. The bottom frame 51 is fixedly connected to the bottom of the base 1. The bottom frame 51 includes a horizontal guide rail 511 and a horizontal support 512 slidably connected to the horizontal guide rail 511. A drive source 55 is provided on the horizontal guide rail 511. The horizontal guide rail 511 can be made of materials such as square steel pipe or I-beam, and is fixed to the base 1 by welding or bolting. The drive source 55 can be a cylinder or a motor to drive the horizontal support 512 to slide along the horizontal guide rail 511, realizing the telescopic function of the bottom frame 51. In this embodiment, a motor screw assembly is specifically used to drive the horizontal support 512 to slide, and the drive source 55 is specifically set as a servo motor.

[0039] Reference Figure 2 The second guide wheel 53 is provided at intervals along the length of the horizontal support 512, and the second guide wheel 53 is rotatably connected to the horizontal support 512; in this embodiment, two second guide wheels 53 are provided at intervals on the second horizontal support 512.

[0040] Reference Figure 3 A tensioning device 7 is installed on the bottom frame 51, and a tension sensor 8 is installed on the pull rope 52. The tensioning device 7 includes a tensioning bracket 71, a lifting source 72, and a tensioning wheel 73 rotatably mounted on the tensioning bracket 71; the lifting source 72 is located between two second guide wheels 53 and is fixed on the horizontal support 512. The lifting end of the lifting source 72 is fixedly connected to the tensioning bracket 71 to drive the tensioning wheel 73 to rise and fall. The lifting source 72 is specifically an electric lifting rod. The pull rope retractor 54 is fixed on the base 1. One end of the pull rope 52 is connected to the pull rope retractor 54, and the other end passes sequentially around one second guide wheel 53, the tensioning wheel 73, and another second guide wheel 53; in this embodiment, there are two pull ropes corresponding to the pull rings 62, and one end of the pull rope 52 is tied to the corresponding pull ring 62 to realize the connection between the pull rope 52 and the car tailgate 9. Correspondingly, each of the second guide pulleys 53 has two parallel annular grooves for accommodating the connecting ropes 52, and the tension pulley 73 also has two parallel annular guide grooves for accommodating the two ropes 52. Two tension sensors 8 are provided corresponding to the ropes 52, and each tension sensor 8 is fixed to its corresponding rope 52.

[0041] Each tension sensor 8 is electrically connected to the lifting source 72. During spraying operations, the tension of the pull rope 52 can be monitored in real time, automatically adjusting the position of the tension wheel 73 to ensure that the pull rope 52 always maintains appropriate tension. Before hoisting the car tailgate 9, the tension wheel 73 is at a certain height driven by the lifting source 72, facilitating the rapid and small-range retraction and extension of the pull rope 52 during subsequent position adjustments of the car tailgate 9 via the tensioning device 7.

[0042] Reference Figure 2 and Figure 4 The second arm 22 includes a first rotating arm segment 221 and a second rotating arm segment 222. One end of the first rotating arm segment 221 is rotatably connected to the first arm 21, and the rotation axis of the first rotating arm segment 221 is perpendicular to the rotation axis of the second rotating arm segment 222. One end of the first rotating arm segment 221 has an integrally formed locking groove 2211, and one end of the second rotating arm segment 222 has an integrally formed locking portion 2221, located within the locking groove 2211. The second arm 22 also includes a hinge pin 23, which passes through the locking groove 2211 and the locking portion 2221. The second locking element is specifically a locking nut 223, which is threaded onto the hinge pin 23. Tightening the locking nut 223 causes the locking groove 2211 and the locking portion 2221 to abut against each other, thus locking the second rotating arm segment 222.

[0043] By introducing a rotatable and adjustable second boom 22, the boom 2 can better adapt to different models of car tailgates 9, and can also adjust the lifting position of the car tailgate 9 during the painting process, improving the flexibility and accuracy of the painting operation. At the same time, this design also simplifies the operation process, reduces the frequency of manual intervention, and helps to improve production efficiency.

[0044] In other embodiments, a telescopic source, such as an electric push rod, can be added between the first rotating arm segment 221 and the second rotating arm segment 222 to realize the automatic rotation function of the second arm 22.

[0045] The implementation principle of the lifting mechanism for painting a car tailgate in Embodiment 2 of this application is as follows: Through the coordinated action of the hook at one end of the boom 2 and the pull-positioning device 5, combined with the lifting connection assembly 6, the car tailgate 9 is kept stable during the painting process, while avoiding direct contact with the fixing device, thereby reducing painting dead angles. The boom 2 is responsible for lifting the car tailgate 9 to an appropriate height for suspension, while the pull-positioning device 5 provides vertical constraint force through the pull rope 52, ensuring accurate positioning of the car tailgate 9 in space. This significantly improves the efficiency and quality of the painting operation, while also reducing the problem of painting dead angles caused by obstruction.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hoisting mechanism for painting automotive tailgates, characterized in that, include: Base (1) A boom (2) is connected to the base (1), and a hook is provided at one end of the boom (2); The lifting drive device (4) includes a lifting rope (41), a first guide wheel (42), and a lifting rope retractor (43). Several first guide wheels (42) are spaced apart along the length of the boom (2), and the first guide wheels (42) are rotatably connected to the boom (2). One end of the lifting rope (41) is connected to the lifting rope retractor (43), and the other end passes through each of the first guide wheels (42) in sequence and is detachably connected to the tailgate (9) of the car. The lifting rope retractor (43) is set on the base (1) and is used to drive the lifting rope (41) to move. The pull positioning device (5) includes a bottom frame (51), a pull rope (52), a second guide wheel (53), and a pull rope retractor (54). The bottom frame (51) is connected to the bottom of the base. Several second guide wheels (53) are spaced apart along the length of the bottom frame (51) and are rotatably connected to the bottom frame (51). One end of the pull rope (52) is connected to the pull rope retractor (54), and the other end passes around each of the second guide wheels (53) and is detachably connected to the tailgate (9). The pull rope retractor (54) is set on the base (1) and is used to drive the pull rope (52) to move.

2. The lifting mechanism for automotive tailgate painting according to claim 1, characterized in that, It also includes a hoisting connection assembly (6), which includes a hoisting ring (61), a pull ring (62) and a clearance bar (63). The pull ring (62) is located at one end of the car tailgate (9), and the clearance bar (63) is located at the other end of the car tailgate (9). The hoisting ring (61) is connected to one end of the clearance bar (63).

3. The lifting mechanism for automotive tailgate painting according to claim 1, characterized in that, The boom (2) includes a first arm (21), a second arm (22) and a first locking member. The first arm (21) is connected to the base (1), and the hook is connected to one end of the second arm (22). The second arm (22) is rotatably connected to the arm segment of the first arm (21), and the first locking member is used to lock the position of the second arm (22) after rotation.

4. The lifting mechanism for automotive tailgate painting according to claim 3, characterized in that, One end of the first arm (21) is fixed with a locking groove (25), and the first locking element includes a locking pin (24); the arm section of the second arm (22) is located in the locking groove (25), and the locking pin (24) passes through the locking groove (25) and the second arm (22).

5. The lifting mechanism for automotive tailgate painting according to claim 3, characterized in that, The bottom frame (51) includes a horizontal guide rail (511) and a horizontal support platform (512) slidably disposed on the horizontal guide rail (511). A drive source (55) is provided on the horizontal guide rail (511), and the drive source (55) is used to drive the horizontal support platform (512) to slide. The horizontal guide rail (511) is fixedly connected to the base (1), and the second guide wheel (53) is rotatably mounted on the horizontal support (512).

6. The lifting mechanism for automotive tailgate painting according to claim 5, characterized in that, A tensioning device (7) is provided on the bottom frame (51), and a tension sensor (8) is provided on the pull rope (52). The tensioning device (7) includes a tensioning bracket (71), a lifting source (72), and a tensioning wheel (73) slidably disposed on the tensioning bracket (71). The lifting source (72) is used to drive the tensioning wheel (73) to rise and fall. The pull rope (52) is wound around the tensioning wheel (73). The tension sensor (8) is electrically connected to the lifting source (72).

7. A lifting mechanism for painting automotive tailgates according to claim 6, characterized in that, The second arm (22) includes a first rotating arm segment (221) and a second rotating arm segment (222) rotatably connected to one end of the first rotating arm segment (221). One end of the first rotating arm segment (221) is rotatably connected to the first arm (21), and the rotation axis of the first rotating arm segment (221) is perpendicular to the rotation axis of the second rotating arm segment (222). The second arm (22) is also provided with a second locking member, which locks the position of the second rotating arm segment (222) after rotation.

8. A lifting mechanism for painting automotive tailgates according to claim 7, characterized in that, The first rotating arm segment (221) is provided with a snap-fit ​​groove (2211) at one end, and the second rotating arm segment (222) is provided with a snap-fit ​​part (2221), which is located inside the snap-fit ​​groove (2211); the second arm (22) also includes a hinge pin (23), which passes through the snap-fit ​​groove (2211) and the snap-fit ​​part (2221); the second locking member is specifically a locking nut (223), which is threadedly connected to the hinge pin (23).

9. A lifting mechanism for painting automotive tailgates according to claim 1, characterized in that, The hook is specifically configured as an anti-detachment hook (3).

Images