Vehicle door transfer device
By designing a door transfer device with a lifting platform and support mechanism adapted to different vehicle models, the problem of poor adaptability of door transfer devices was solved, and efficient and low-cost door transfer was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHERY AUTOMOBILE CO LTD
- Filing Date
- 2024-01-03
- Publication Date
- 2026-08-04
AI Technical Summary
The existing door transfer device cannot adapt to the differences between different platforms and vehicle models, resulting in the need to frequently change transfer tooling, increasing labor costs and reducing production efficiency.
A door transfer device was designed, comprising a lifting platform and a support mechanism. The support mechanism has multiple mounting positions to adapt to the outer panel profiles of different vehicle models. The lifting mechanism enables automatic transfer of the door, avoiding the need for tooling changes.
It improves production efficiency, saves time on changing transfer tools, reduces labor costs, and ensures that the doors are not damaged during transfer.
Smart Images
Figure CN117900304B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of material handling technology in automobile manufacturing, and specifically to a door transfer device. Background Technology
[0002] As competition in the automotive market intensifies, manufacturers continuously iterate on their models to enhance product competitiveness, leading to increasing production pressure on factory assembly lines. At the four-door pressing station on the welding workshop assembly line, doors from multiple car models need to be transferred to the pressing mold cavity using transfer fixtures. Because doors from different platforms and car models have different shapes and dimensions, each type of door requires a corresponding transfer device. These door transfer fixtures are relatively large, and switching between them requires not only manually pushing the fixture to the feeding port of the pressing mold cavity but also calibration before pressing and power plug switching, resulting in significant time consumption, increased labor costs, and reduced factory production efficiency.
[0003] The patent disclosed in the patent entitled "Automobile Door Cover Edge Lifting and Conveying Device" (CN201950134U) includes a base frame, a main frame and conveying guide wheels. In this solution, the top surfaces of the conveying guide wheels are arranged in the same horizontal plane, which cannot fit well with the surface of the outer panel of the car door with a large curvature, and cannot meet the transfer work of various car doors with large differences in shape. Summary of the Invention
[0004] The purpose of this invention is to provide a door transfer device that can conveniently transfer doors of various car models.
[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a car door transfer device, including a frame and a lifting platform arranged on the frame, a support mechanism is provided on the lifting platform, a lifting mechanism is provided on the frame to drive the support mechanism to move up and down, the top surface of the support mechanism is supported on the outer panel surface of the car door, and the support mechanism includes at least two placement positions for placing the car door.
[0006] This invention places the car door on a support mechanism of a lifting platform, allowing the car door to be transferred to the processing station within the pressing mold cavity via the up-and-down movement of the lifting platform. The support mechanism has at least two placement positions for the car door, and its top surface can support various car door outer panel profiles. When transferring car doors of different models, there is no need to switch transfer fixtures, saving time on changing transfer fixtures and improving production efficiency. Attached Figure Description
[0007] Figure 1 This is an isometric view of the door transfer device;
[0008] Figure 2This is a front view of the door transfer device;
[0009] Figure 3 for Figure 2 A magnified view of a portion of the image;
[0010] Figure 4 Left view of the door being transported by the door transfer device;
[0011] Figure 5 An isometric view of the door being transported to the door transfer device;
[0012] Figure 6 A bottom view of the conveyor door of the door transfer device with the frame removed. Detailed Implementation
[0013] Example 1
[0014] See Figure 1-6 The door transfer device shown includes a frame 1 and a lifting platform 10 arranged on the frame 1. The lifting platform 10 is provided with a support mechanism 11. The frame 1 is provided with a lifting mechanism 12 that drives the support mechanism 11 to move up and down. The top surface of the support mechanism 11 is supported on the outer panel surface of the door A. The support mechanism 11 includes at least two placement positions for placing the door A.
[0015] In the above scheme, door A needs to be transported to the pressing mold cavity for processing. In actual factory production, the feeding height of the pressing mold cavity is approximately 1.2 meters, therefore a lifting platform 10 is needed to transport door A to a higher position. Since the outer panel of door A is smoother than the inner panel, it is placed face down on the support mechanism 11 during transport to facilitate downstream transport and reduce the risk of scratches between door A and the support mechanism 11. The support mechanism has at least two placement positions for the door, eliminating the need to switch transfer fixtures when transferring doors from different car models, saving time on changing transfer fixtures and improving production efficiency.
[0016] In addition, the lifting mechanism 12 that drives the support mechanism 11 to move up and down can be selected from various driving mechanisms such as electric cylinder, pneumatic cylinder, and hydraulic cylinder. In this embodiment, electric cylinder drive is preferred for its convenience. In actual use, a pair of auxiliary telescopic rods are also provided on both sides of the electric cylinder. The two auxiliary telescopic rods are of the same length and are symmetrically distributed relative to the electric cylinder to prevent the lifting platform 10 from tilting during the up and down movement.
[0017] Preferably, the support mechanism 11 is detachably connected to the frame 1, and the support mechanism 11 is selectively installed on the frame 1 at at least two different mounting positions. The support mechanism 11 can be used to transfer doors A with different outer panel shapes for different car models by changing its mounting position on the frame 1, thus forming different placement positions for doors A.
[0018] Specifically, the support mechanism 11 includes a left column roller group 11A and a right column roller group 11B. The left column roller group 11A and the right column roller group 11B are composed of unit rollers 111. The top profiles of the unit rollers 111 in the same column are coplanar and the roller cores are parallel. The top surfaces of the left column roller group 11A and the right column roller group 11B are in the shape of an upward-opening figure eight, and the intersection line of the top surfaces of the left column roller group 11A and the right column roller group 11B is horizontal as a whole.
[0019] In the above scheme, any two adjacent unit rollers 111 in the same column can be arranged alternately or abutted against each other, that is, the outlines of two adjacent rollers are arranged tangentially. This embodiment preferably arranges them alternately, which can save the number of unit rollers 111 in each column of rollers and reduce the wear of unit rollers 111. The coplanar roller top outlines and parallel roller cores of the unit rollers 111 in the same column are to ensure that the door A can be smoothly conveyed on the unit rollers 111. Since the outer panel of the door A is an outwardly convex arc surface, the roller top surfaces of the left column roller group 11A and the right column roller group 11B are open-to-the-up V-shape, which can better fit the outer panel surface of the door A and prevent the door A from slipping off the side of the support mechanism 11 under the action of gravity. The intersection line of the roller top surfaces of the left column roller group 11A and the right column roller group 11B is horizontal as a whole, so that the door A will not slip along the conveying direction.
[0020] To facilitate the rapid transfer of doors A from different vehicle models, the left-row roller assembly 11A includes a first left-row roller assembly 11A1 and a second left-row roller assembly 11A2 arranged outwardly downward and inwardly upward, respectively. The second left-row roller assembly 11A2 is detachably connected to the frame 1. When using the second left-row roller assembly 11A2 and the right-row roller assembly 11B as the placement position for transferring door A, the first left-row roller assembly 11A1 will not interfere with door A because the second left-row roller assembly 11A2 is higher than the first left-row roller assembly 11A1. When it is necessary to transfer a door A from another vehicle model, the second left-row roller assembly 11A2 can be directly disassembled, and the first left-row roller assembly 11A1 and the right-row roller assembly 11B can then be used as the placement position for the new door A.
[0021] To enable the support mechanism 11 to be detachably connected to the frame 1, a strip support plate 112 is provided on the frame 1. The unit rollers 111 in the same row have the same diameter, and the lower end of their axles is fixed to the upper end of the strip support plate 112. The axle surfaces of the unit rollers 111 on opposite sides form a figure-eight shape with an upward angle or a slight upward slope. In the above scheme, the unit rollers 111 in the same row are arranged on the same strip support plate 112, and the top surface of the unit roller 111 is higher than the upper edge of the strip support plate 112, preventing the strip support plate 112 from hitting the outer panel surface of the car door A. In this embodiment, as shown... Figure 3As shown, the lower edge of the strip support plate 112 is inserted into a strip groove on the frame 1 that matches the strip support plate 112, so as to facilitate the installation and disassembly of the strip support plate 112. The strip support plate 112 can be configured as a folded plate with the folded edge parallel to the column where the unit rollers 111 are located, and its upper half is inclined inward so that the surfaces where the axles of the unit rollers 111 on the opposite side are located form an upward or oblique V-shape.
[0022] Example 2
[0023] Building upon the existing features in Embodiment 1, the frame 1 is further equipped with a conveyor platform 20. The conveyor platform 20 is arranged adjacent to the downstream end of the guide door A of the support mechanism 11. A conveyor belt mechanism 21 for conveying the guide door A is arranged on the conveyor platform 20. The support mechanism 11 can be raised to a transition position flush with the top surface of the guide door A supported by the conveyor belt mechanism 21, or lowered to a loading position below the transition position. The two conveyor belt surfaces 211 of the conveyor belt mechanism 21 are arranged in an upward-opening V-shape, and the intersection line of the conveyor belt surfaces 211 is horizontal overall.
[0024] It should be noted that, Figure 4-6 The invention demonstrates two states: door A is in the loading position lifting state and conveyor belt mechanism 21 conveying state. The device of the present invention can only transfer one door A at a time.
[0025] To provide more space for the pressing mold cavity process, door A needs to be horizontally fed into the pressing mold cavity via a transfer device. However, most existing door transfer fixtures directly move door A onto a liftable conveyor belt, then lift the conveyor belt along with door A to a suitable height before belt conveying. When manually handling door A, placing the outer panel of door A on the conveyor belt generates impact force, which can easily lead to conveyor belt wear over time, increasing maintenance costs. Furthermore, a large impact force from placing door A can also cause dents on the surface of the outer panel, requiring rework or even complete scrapping. This invention separates the above-mentioned processes, using a lifting platform 10 and a conveyor platform 20. The operator first places the car door A on the support mechanism 11 at the loading position, ensuring that the impact force generated by placing the car door A is borne by the support mechanism 11 of the lifting platform 10, rather than the conveyor belt mechanism 21. After the support mechanism 11 is raised to the transfer position, the car door A is then pushed horizontally onto the conveyor platform 20, and the conveyor belt mechanism 21 transports the car door A into the pressing mold cavity. This transfer process directly eliminates the impact along the direction of gravity between the car door A and the conveyor belt surface 211, simply and conveniently solving the aforementioned problems. The conveyor belt mechanism 21 can be driven by a motor to achieve belt conveying.
[0026] To facilitate the positioning of door A, guide roller groups 22 are respectively provided on the sides of the support mechanism 11 and the conveyor belt mechanism 21. The guide roller group 22 is composed of unit guide rollers 221. The unit guide rollers 221 in the same row have the same wheel diameter and the coplanar plane of the wheel axle is perpendicular or nearly perpendicular to the bottom edge of door A. The circumferential surface of the rollers of the guide roller group 22 abuts against the bottom edge of door A.
[0027] In the above scheme, when the car door A is placed on the support mechanism 11, the guide roller group 22 can serve as a reference for the car door A. The bottom edge of the car door A can be directly pressed against the wheel surface of the corresponding guide roller group 22 to quickly adjust the transfer posture of the car door A. Simultaneously, the guide roller group 22 can also prevent the car door A from accidentally slipping off the side where the guide roller group 22 is located. The axle of the unit guide roller 221 on the lifting platform 10 is in the vertical direction, and the axle of the unit guide roller 221 on the transfer platform 20 is slightly inclined relative to the vertical surface, but both are perpendicular or nearly perpendicular to the bottom edge of the car door A. When the car door A is pushed from the transfer position to the transfer platform 20 and conveyed into the pressing mold cavity, the guide roller group 22 can also play a guiding role during the translation of the car door A.
[0028] Another point that needs to be specifically noted is that, Figure 1 , Figure 2 The guide roller assembly 22 shown is connected to the folding plate, which can be moved up and down along the edge of the conveyor frame 20 to adjust its position to fit the door A of different car models.
[0029] To protect door A from damage during transport, the supporting surface of the support mechanism 11 and the circumferential surface of the unit guide roller 221 are both made of rubber. Preferably, parallel annular grooves can also be provided on the circumferential surfaces of the unit roller 111 and the unit guide roller 221. The annular grooves on the circumferential surface of the unit roller 111 can reduce the noise generated when door A is pushed; at the loading or transfer position, the bottom edge of door A can be directly inserted into the annular grooves on the circumferential surface of the unit guide roller 221, making it less likely to slip out.
[0030] The vehicle door A includes a symmetrical left door and a right door. To facilitate the transport of different left and right doors by the conveyor frame 20, the upper end of the conveyor frame 20 is rotatably engaged with the column 23 below it, and a limiting mechanism 24 is provided between them to restrict their relative rotation. In the above scheme, the column 23 is rotatably connected to the frame 1, allowing the conveyor frame 20 to rotate around the center of the conveying path of the conveyor belt mechanism 21 on the frame 1. Preferably, the limiting mechanism 24 is a positioning pin, arranged on one side of the rotation center, and the positioning pin passes through both the conveyor frame 20 and the frame 1. The conveyor frame 20 is also provided with two positioning pin holes symmetrically arranged opposite the column 23. When it is necessary to switch the left and right doors being transported, simply pull out the positioning pin, rotate the conveyor frame 20 180 degrees around the column 23, reinsert the positioning pin, and change the belt conveying direction of the conveyor belt mechanism 21 to complete the switching of different transport postures of the conveyor frame 20.
Claims
1. A door transfer device, comprising a frame (1) and a lifting platform (10) arranged on the frame (1), characterized in that: The lifting platform (10) is provided with a support mechanism (11), and the frame (1) is provided with a lifting mechanism (12) that drives the support mechanism (11) to move up and down. The top surface of the support mechanism (11) is supported on the outer panel of the door (A). The support mechanism (11) includes at least two placement positions for the door (A). The support mechanism (11) includes a left column roller group (11A) and a right column roller group (11B). The left column roller group (11A) and the right column roller group (11B) are composed of unit rollers (111). The top profiles of the unit rollers (111) in the same column are coplanar and the roller cores are parallel. The top surfaces of the left column roller group (11A) and the right column roller group (11B) are in the shape of an upward-opening figure eight, and the intersection line of the top surfaces of the left column roller group (11A) and the right column roller group (11B) is horizontal as a whole. The frame (1) is also provided with a conveyor frame (20), which is arranged adjacent to the downstream end of the guide door (A) of the support mechanism (11). The conveyor frame (20) is provided with a conveyor belt mechanism (21) for the conveyor door (A). The support mechanism (11) can be raised to a transition position that is flush with the top surface of the conveyor belt mechanism (21) supporting the door (A), or lowered to a loading position below the transition position. The conveyor frame (20) is rotatably engaged with the upper end of the column (23) below it, and a limiting mechanism (24) is provided between the two to restrict their relative rotation.
2. The door transfer device according to claim 1, characterized in that: The support mechanism (11) is detachably connected to the frame (1), and the support mechanism (11) is selected to be installed on the frame (1) at at least two mounting positions.
3. The door transfer device according to claim 1 or 2, characterized in that: The left column roller group (11A) includes a left column first roller group (11A1) and a left column second roller group (11A2) arranged in an outer lower and inner upper configuration. The left column second roller group (11A2) is detachably connected to the frame (1).
4. The door transfer device according to claim 2, characterized in that: The frame (1) is provided with a strip support plate (112). The unit rollers (111) in the same row have the same wheel diameter and the lower end of the wheel axle is fixed to the upper end of the strip support plate (112). The surfaces where the wheel axles of the unit rollers (111) on opposite sides are located form a figure-eight shape with the included angle upward or obliquely upward.
5. The door transfer device according to claim 1, characterized in that: The two conveyor belt surfaces (211) of the conveyor belt mechanism (21) are in an upward-opening figure-eight shape, and the intersection line of the conveyor belt surfaces (211) is horizontal as a whole.
6. The door transfer device according to claim 1, characterized in that: The support mechanism (11) and the conveyor belt mechanism (21) are respectively provided with guide roller groups (22). The guide roller group (22) is composed of unit guide rollers (221). The unit guide rollers (221) in the same row have the same wheel diameter and the coplanar plane of the wheel axle is perpendicular or nearly perpendicular to the bottom edge of the door (A). The circumferential surface of the rollers of the guide roller group (22) abuts against the bottom edge of the door (A).
7. The door transfer device according to claim 6, characterized in that: The support surface of the support mechanism (11) and the roller circumference of the unit guide roller (221) are both made of rubber.