A multi-model door centering device

Abstract

This invention discloses a multi-vehicle door alignment device, comprising a base, on which are mounted a lifting mechanism, a support mechanism, a positioning mechanism, a hinge correction mechanism, and a guide mechanism. The lifting mechanism includes a lifting frame capable of being raised and lowered; the support mechanism includes at least two support units, each including a rotatable support frame with a support block on it; the positioning mechanism includes at least two positioning units, each including a positioning frame capable of sliding in the left-right, front-back, and vertical directions, with a positioning pin on it; the hinge correction mechanism includes two hinge correction units, each including a correction frame, a fixed correction block, and a movable correction block; the guide mechanism includes multiple guide units for guiding the vertical movement of the door. The advantage of this invention compared to existing technologies is that it achieves door alignment correction during automatic door installation.

Description

Technical Field

[0001] This invention relates to the field of automotive welding tools, and more particularly to a multi-model door alignment device. Background Technology

[0002] In the automated door installation process of the automotive welding industry, after the door is assembled, it is removed from the production line and placed on a transfer platform for later use. During automated installation, a robot retrieves the door from the transfer platform and installs it onto the vehicle body. Existing transfer platforms typically only have a support mechanism and a guiding mechanism surrounding the support mechanism. Operators manually place the door onto the support mechanism of the transfer platform, and the guiding mechanism guides the door during placement. This type of transfer platform has the following drawbacks:

[0003] 1. When switching between multiple vehicle models, the commonality of this transfer station is reduced, especially when the vehicle models have significantly different shapes, making it impossible to share the transfer station;

[0004] Second, during the process of placing the car door on the transfer platform, it is impossible to accurately position the horizontal plane of the car door;

[0005] Third, the hinges on the car door cannot be corrected. If the hinges on the car door are rotated at a large angle, during the subsequent automatic installation process of the car door, when the car door is fastened to the car body, the hinges are very likely to collide with the car body or even fail to be installed. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-vehicle door alignment device to realize the door alignment correction function during automatic door installation.

[0007] This invention is achieved through the following technical solution:

[0008] A multi-vehicle door alignment device includes a base, on which a lifting mechanism, a support mechanism, a positioning mechanism, a hinge correction mechanism, and a guide mechanism are provided.

[0009] The lifting mechanism is used to hold the car door in place and move the car door vertically; the guiding mechanism is used to guide the vertical movement of the car door; the positioning mechanism is used to position the car door; and the supporting mechanism is used to support the car door after it has been moved into place.

[0010] The hinge correction mechanism includes two hinge correction units, which correspond to two hinges on the car door. Each hinge correction unit includes a correction frame, a fixed correction block, and a movable correction block. The correction frame is slidably mounted on the base, the fixed correction block is fixedly mounted on the correction frame, and the movable correction block is movably mounted on the correction frame and can be rotated relative to the correction frame. By rotating the movable correction block, the hinge correction unit can be opened or closed. In the closed state, the movable correction block and the fixed correction block are respectively clamped on the upper and lower sides of the hinge plate of the car door hinge.

[0011] As a preferred embodiment of the above-mentioned centering device, the lifting mechanism includes a lifting frame that can be raised and lowered, and multiple lifting blocks are provided on the lifting frame to lift the center of gravity of the car door.

[0012] The support mechanism includes at least one support unit, and the positioning mechanism includes at least two positioning units, with each support unit and each positioning unit arranged around the lifting mechanism.

[0013] The support unit includes a rotatable support frame with support blocks on it, which support the car door.

[0014] The positioning unit includes a positioning frame that can slide in the left-right, front-back and vertical directions respectively. The positioning frame is equipped with a positioning pin, which cooperates with the positioning hole of the door to achieve the positioning of the door.

[0015] The guiding mechanism includes multiple guiding units distributed around the periphery of the base. The guide blocks of the multiple guiding units contact the edge of the door to guide the vertical movement of the door.

[0016] As a preferred embodiment of the above-mentioned centering device, the centering device further includes a detection unit, which includes several position sensors. At least one support unit and at least one positioning unit are respectively provided with position sensors. Each hinge correction unit is provided with a position sensor, and the position sensor in the hinge correction unit is set on the correction frame and located on one side of the fixed correction block.

[0017] As a preferred embodiment of the above-mentioned centering device, a positioning support column is provided at the bottom of the positioning pin. The diameter of the top surface of the positioning support column is larger than the diameter of the bottom of the positioning pin, and the top surface of the positioning support column forms a positioning support surface located outside the positioning pin.

[0018] As a preferred embodiment of the above-mentioned centering device, the positioning unit further includes three modules, namely a first module, a second module, and a third module. The first module is mounted on the base, and the first slider of the first module can slide left and right under the action of the first module. The second module is mounted on the first slider of the first module through an adapter plate one, and the second slider of the second module can slide back and forth under the action of the second module. The third module is mounted on the second slider of the second module through an adapter plate two, and the third slider of the third module can slide vertically under the action of the third module. The positioning frame of the positioning unit is mounted on the third slider.

[0019] As a preferred embodiment of the above-mentioned centering device, the base is provided with a first auxiliary support structure on one side of the first module, and the first auxiliary support structure provides sliding support for the first adapter plate. The first adapter plate is provided with a second auxiliary support structure on one side of the second module, and the second auxiliary support structure provides sliding support for the second adapter plate.

[0020] As a preferred embodiment of the above-mentioned centering device, the support unit further includes a support base and a support swing arm cylinder. The support base is fixedly installed on the base, the cylinder body of the support swing arm cylinder is installed on the support base, and the support frame is fixedly installed on the swing arm of the support swing arm cylinder.

[0021] As a preferred embodiment of the above-mentioned centering device, in the hinge correction unit, the correction frame is slidably mounted on the base via the fourth module. The fourth module is mounted on the base, and the fourth slider of the fourth module can slide horizontally under the drive of the fourth module. The sliding direction of the fourth slider is parallel to the axis of the hinge shaft of the door hinge. The bottom of the correction frame is fixedly mounted on the fourth slider of the fourth module.

[0022] As a preferred embodiment of the above-mentioned centering device, the hinge correction unit further includes a correction arm cylinder, the cylinder body of which is mounted on the correction frame, and the movable correction block is fixedly mounted on the arm of the correction arm cylinder.

[0023] As a preferred embodiment of the above-mentioned centering device, the base is provided with several support legs at its bottom. The bottom of the support legs is connected to the support base plate through a connecting plate. The support base plate is fixedly supported on the ground. A vertical leveling bolt is threaded onto the support leg. A support groove matching the shape of the bottom of the leveling bolt is opened on the top surface of the support base plate. A threaded hole is opened on the support base plate below the support groove. A guide bolt is threaded into the threaded hole of the support base plate. The bottom of the leveling bolt is pressed against the support groove of the support base plate. The leveling bolt is a hollow bolt, and the center hole of the adjusting bolt is fitted outside the guide bolt.

[0024] The present invention has the following advantages over the prior art:

[0025] 1. This invention provides a multi-vehicle door centering device. A lifting mechanism pre-attaches the door, which is then lowered until it contacts the positioning and support mechanisms. During this descent, multiple guiding units of the guiding mechanism guide the door's vertical movement, ensuring stability and accuracy during placement and preventing scratches or deformation. The positioning mechanism uses positioning pins that engage with the door's positioning holes to achieve precise door positioning. The support mechanism provides stable support for the positioned door. After placement, a hinge correction mechanism effectively corrects the hinge state, ensuring smooth subsequent door installation.

[0026] 2. The present invention provides a multi-vehicle door centering device, wherein the positioning pin of the positioning unit can be adjusted in three directions: left and right, front and back, and vertical, ensuring the flexibility and positioning accuracy shared by multiple vehicle models.

[0027] 3. The present invention provides a multi-model door centering device, which is further provided with a detection unit. The position sensors on the support unit and the positioning unit detect whether the door has been lowered into position. When the door is lowered into position, the hinge plate of the door hinge is clamped by the hinge correction unit to correct the posture of the hinge plate. The position sensor on the hinge correction unit detects whether the hinge plate of the door hinge has been rotated into position, thereby ensuring the accuracy of the door's own state and the state of the hinge on the door.

[0028] 4. The present invention provides a multi-model door centering device, wherein the straightening frame of the hinge straightening unit can slide horizontally, thereby adjusting the distance between the two hinge straightening units, and thus meeting the needs of different door hinge distances on different models. Attached Figure Description

[0029] Figure 1 This is a perspective view of the present invention.

[0030] Figure 2 This is a perspective view of the base of the present invention.

[0031] Figure 3 This is a cross-sectional view of the connection between the support legs and the support base plate of the base of the present invention.

[0032] Figure 4 This is a perspective view of the lifting mechanism of the present invention.

[0033] Figure 5 This is a perspective view of the support unit of the present invention.

[0034] Figure 6 This is a perspective view of the positioning unit of the present invention.

[0035] Figure 7This is a three-dimensional exploded view of the positioning unit of the present invention.

[0036] Figure 8 This is a perspective view of the hinge correction unit of the present invention.

[0037] Figure 9 This is a perspective view of the hinge correction unit of the present invention in conjunction with the door hinge.

[0038] Figure 10 This is a perspective view of the guide unit of the present invention.

[0039] Figure 11 This is a perspective view of the car door in the raised position when the invention is in operation.

[0040] Figure 12 This is a perspective view of the vehicle door in the raised, low position when the invention is in operation.

[0041] Numbering on the map:

[0042] 1. Base, 11. Support legs, 12. Connecting plate, 13. Support base plate, 14. Leveling bolt, 15. Threaded hole;

[0043] 2 Lifting mechanism, 21 Lifting base, 22 Lifting cylinder, 23 Lifting frame, 24 Lifting block;

[0044] 3 Support mechanism, 31 Support frame, 32 Support block, 33 Support base, 34 Support swing arm cylinder, 35 Support position sensor;

[0045] 4 Positioning mechanism, 41 Positioning frame, 42 Positioning pin, 43 Positioning support column, 44 Positioning support surface, 45 First module, 46 Second module, 47 Third module, 48 First slider, 49 Adapter plate one, 410 Second slider, 411 Adapter plate two, 412 Third slider, 413 Support rail, 414 Support slider, 415 Positioning sensor.

[0046] 5. Hinge correction mechanism, 51. Correction swing arm cylinder, 52. Correction frame, 53. Fixed correction block, 54. Movable correction block, 55. Fourth module, 56. Fourth slider, 57. Correction position sensor.

[0047] 6. Guiding mechanism, 61. Guide frame, 62. Guide block, 63. Guide surface, 64. Guide swing arm cylinder, 65. Guide base;

[0048] 7. Car door, 71. Hinge, 72. Hinge shaft, 73. Hinge plate. Detailed Implementation

[0049] The embodiments of the present invention are described in detail below. These embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments.

[0050] See Figures 1 to 12 This embodiment discloses a multi-vehicle door centering device, including a base 1, on which a lifting mechanism 2, a support mechanism 3, a positioning mechanism 4, a hinge correction mechanism 5, and a guide mechanism 6 are provided.

[0051] The base 1 has several support legs 11 at its bottom. The bottom of the support legs 11 is connected to the support base plate 13 via a connecting plate 12. The connecting plate 12 is an L-shaped plate. The support base plate 13 is fixedly supported on the ground. A vertical leveling bolt 14 is threaded onto the support leg 11. A support groove matching the shape of the bottom of the leveling bolt 14 is opened on the top surface of the support base plate 13. A threaded hole 15 is opened on the support base plate 13 below the support groove. A guide bolt is threaded into the threaded hole 15 of the support base plate 13. The bottom of the leveling bolt 14 is pressed against the support groove of the support base plate 13. The leveling bolt 14 is a hollow bolt. The center hole of the adjusting bolt is fitted outside the guide bolt. The guide bolt can vertically guide the adjusting bolt. During installation, the support base plate 13 is first fixed to the ground with screws. The adjusting bolts on each support leg 11 are rotated to adjust the horizontal height of the base 1. When the horizontality of the base 1 meets the requirements, the L-shaped connecting plate 12 is welded to the support leg 11 and the support base plate 13 respectively to achieve a fixed connection between the support leg 11 and the support base plate 13, thus ensuring the horizontality of the base 1 installation.

[0052] The lifting mechanism 2 is used to hold the door 7 in place and move the door 7 vertically; the guiding mechanism 6 is used to guide the vertical movement of the door 7; the positioning mechanism 4 is used to position the door 7; and the supporting mechanism 3 is used to support the door 7 after it has been moved into place.

[0053] The lifting mechanism 2 includes a lifting base 21, a lifting cylinder 22, and a lifting frame 23 capable of being raised and lowered. The lifting base 21 is fixedly mounted on the base 1. The cylinder body of the lifting cylinder 22 is mounted on the lifting base 21, and the cylinder guide rod of the lifting cylinder 22 extends vertically upward. The lifting frame 23 is mounted on the top of the cylinder guide rod of the lifting cylinder 22. Multiple lifting blocks 24 are provided on the lifting frame 23, which lift the center of gravity of the car door 7. In this embodiment, the lifting frame 23 has four lifting blocks 24, which surround the center of gravity of the car door 7 during operation.

[0054] The support mechanism 3 includes at least one support unit, and the positioning mechanism 4 includes at least two positioning units. Each support unit and each positioning unit is arranged around the lifting mechanism 2.

[0055] The support unit includes a rotatable support frame 31 with a support block 32 supporting the door 7. The support unit also includes a support base 33 and a support swing arm cylinder 34. The support base 33 is fixedly mounted on the base 1, the cylinder body of the support swing arm cylinder 34 is mounted on the support base 33, and the support frame 31 is fixedly mounted on the swing arm of the support swing arm cylinder 34. The support swing arm cylinder 34 drives the swing arm to rotate up and down, thereby causing the support frame 31 and its support block 32 to rotate up and down together, thus opening or closing the support unit. Different support units can be selectively opened or closed to adapt to the support requirements of different vehicle models.

[0056] The positioning unit includes a positioning frame 41 that can slide in the left-right, front-back, and vertical directions. The positioning frame 41 has a positioning pin 42, which engages with the positioning hole of the door 7 to position the door 7. A positioning support post 43 is located at the bottom of the positioning pin 42. The top diameter of the positioning support post 43 is larger than the bottom diameter of the positioning pin 42. The top surface of the positioning support post 43 forms a positioning support surface 44 around the positioning pin 42, which supports the door 7. Thus, the positioning pin 42 provides positioning support for the door 7. A combination of one support unit and two positioning units can be used to form a three-point support for the door 7.

[0057] The positioning unit also includes three modules: a first module 45, a second module 46, and a third module 47. The first module 45 is mounted on the base 1, and the first slider 48 of the first module 45 can slide left and right under the action of the first module 45. The second module 46 is mounted on the first slider 48 of the first module 45 via an adapter plate 1 49, and the second slider 410 of the second module 46 can slide back and forth under the action of the second module 46. The third module 47 is mounted on the second slider 410 of the second module 46 via an adapter plate 2 411, and the third slider 412 of the third module 47 can slide vertically under the action of the third module 47. The positioning frame 41 of the positioning unit is mounted on the third slider 412. A first auxiliary support structure is provided on the base 1 on one side of the first module 45, which provides sliding support for the first adapter plate 49. A second auxiliary support structure is provided on the first adapter plate 49 on one side of the second module 46, which provides sliding support for the second adapter plate 411. Each auxiliary support structure includes a support guide rail 413 and a support slider 414 that slide together. The two support sliders 414 provide sliding support for the two adapter plates respectively. The provision of two sets of auxiliary support mechanisms 3 to provide auxiliary support for the two adapter plates can prevent off-center loading.

[0058] The first module 45 drives the positioning frame 41 and its positioning pin 42 to move left and right, the second module 46 drives the positioning frame 41 and its positioning pin 42 to move back and forth, and the third module 47 drives the positioning frame 41 and its positioning pin 42 to move vertically. This allows the positioning frame 41 and its positioning pin 42 to be adjusted in three directions: left and right, back and forth, and vertical, to adapt to the positioning requirements of the door 7 of different car models.

[0059] The hinge correction mechanism 5 includes two hinge correction units, each corresponding to one of the two hinges 71 on the door 7. Each hinge correction unit includes a correction arm cylinder 51, a correction frame 52, a fixed correction block 53, and a movable correction block 54. The correction frame 52 is slidably mounted on the base 1, the fixed correction block 53 is fixedly mounted on the correction frame 52, and the movable correction block 54 is movably mounted on the correction frame 52 and can rotate relative to the correction frame 52. The cylinder body of the correction arm cylinder 51 is mounted on the correction frame 52, and the movable correction block 54 is fixedly mounted on the arm of the correction arm cylinder 51. By rotating the movable correction block 54, the hinge correction unit can be opened or closed. In the closed state, the movable correction block 54 and the fixed correction block 53 are respectively clamped on the upper and lower sides of the hinge plate 73 of the hinge 71 of the door 7.

[0060] In the hinge correction unit, the correction frame 52 is slidably mounted on the base 1 via the fourth module 55. The fourth module 55 is mounted on the base 1, and the fourth slider 56 of the fourth module 55 can slide horizontally under the drive of the fourth module 55. The sliding direction of the fourth slider 56 is parallel to the axis of the hinge shaft 72 of the hinge 71 on the door 7. The bottom of the correction frame 52 is fixedly mounted on the fourth slider 56 of the fourth module 55. Driven by the fourth module 55, the correction frame 52 of the hinge correction unit can slide horizontally, thereby adjusting the distance between the two hinge correction units and meeting the needs of varying distances between the two hinges 71 on the door 7 of different car models.

[0061] The guiding mechanism 6 includes multiple guiding units distributed around the periphery of the base 1. Each guiding unit includes a rotatable guide frame 61. The guide frame 61 is driven to rotate by a guide swing arm cylinder 64. The guide swing arm cylinder 64 is mounted on the base 1 via a guide base 65. The guide frame 61 is provided with a guide block 62. When the guiding unit is closed, the guide surface 63 on the inner side of the guide block 62 extends vertically. The guide surface 63 on the inner side of the guide block 62 of the multiple guiding units contacts the edge of the door 7, thereby guiding the vertical movement of the door 7.

[0062] The centering device also includes a detection unit, which comprises several position sensors. At least one support unit and at least one positioning unit are each equipped with a position sensor. The position sensor in the support unit is a support position sensor 35, which is mounted on the support frame 31 and located on one side of the support block 32. The position sensor in the positioning unit is a positioning position sensor 415, which is mounted on the positioning frame 41 and located on one side of the positioning pin 42. Each hinge correction unit is also equipped with a position sensor, specifically a correction position sensor 57, which is mounted on the correction frame 52 and located on one side of the fixed correction block 53.

[0063] The working process of the multi-vehicle door alignment device provided in this embodiment is as follows:

[0064] In the initial state, the lifting mechanism 2 of the centering device is in the raised position, the guide units of the guide mechanism 6 are in the closed state, the support units of the support mechanism 3 are in the closed state, the positioning units of the positioning mechanism 4 are adjusted to the appropriate position for the corresponding vehicle model, and the two hinge correction units are in the open state.

[0065] The door 7 is transported to the top of the centering device by a transport gripper. When the door 7 is in the raised position, the transport gripper releases the door 7 and moves away, supported by multiple lifting blocks 24 of the lifting mechanism 2. Driven by the lifting cylinder 22 of the lifting mechanism 2, the lifting frame 23 lowers the door 7 together. During the descent, the guide surfaces 63 on the inner sides of the guide blocks 62 of the surrounding guide units contact the edge of the door 7 to guide its descent. During the descent of the door 7, the positioning pins 42 of each positioning unit are inserted into the positioning holes of the door 7 one by one. When the door 7 is lowered into place, the support blocks 32 of each support unit support the lowered door 7, and the positioning support surfaces 44 on each positioning pin 42 provide auxiliary support for the lowered door 7. When the support position sensor 35 and the positioning position sensor 415 detect that the door 7 has descended to the correct position, the support position sensor 35 and the positioning position sensor 415 will send signals, and the correction swing arm cylinders 51 of the two hinge correction units will move, driving the two movable correction blocks 54 to flip and close respectively. This will press the hinge plates 73 of the two hinges 71 on the door 7 between the corresponding movable correction blocks 54 and the fixed correction blocks 53, correcting the posture of the hinge plates 73 of the hinges 71. The correction position sensor 57 in the hinge correction unit will detect whether the correction of the hinge plates 73 of the corresponding hinges 71 is in place. When the correction position sensor 57 detects that the posture of the hinges 71 is in place, the posture of the entire door 7 and the posture of the hinges 71 on the door 7 are in accordance with the requirements. Next, the automatic installation visual guidance and positioning gripper of door 7 will pick up door 7. When the automatic installation visual guidance and positioning gripper of door 7 moves to the picking position, the two hinge correction units will open, and the automatic installation visual guidance and positioning gripper of door 7 will pick up door 7 and leave, and enter the next automatic installation process of door 7.

[0066] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-vehicle door centering device, comprising a base (1), characterized in that: The base (1) is equipped with a lifting mechanism (2), a support mechanism (3), a positioning mechanism (4), a hinge correction mechanism (5), and a guide mechanism (6). The lifting mechanism (2) is used to hold the door (7) in place and drive the door (7) to move vertically; the guiding mechanism (6) is used to guide the vertical movement of the door (7); the positioning mechanism (4) is used to position the door (7); the supporting mechanism (3) is used to support the door (7) after it has moved into place. The hinge correction mechanism (5) includes two hinge correction units, which correspond to the two hinges (71) on the car door (7). Each hinge correction unit includes a correction frame (52), a fixed correction block (53), and a movable correction block (54). The correction frame (52) is slidably mounted on the base (1), the fixed correction block (53) is fixedly mounted on the correction frame (52), and the movable correction block (54) is movably mounted on the correction frame (52) and can be flipped relative to the correction frame (52). By flipping the movable correction block (54), the hinge correction unit can be opened or closed. In the closed state, the movable correction block (54) and the fixed correction block (53) are respectively clamped on the upper and lower sides of the hinge plate (73) of the hinge (71) of the car door (7).

2. The multi-vehicle door centering device as described in claim 1, characterized in that: The lifting mechanism (2) includes a lifting frame (23) that can be raised and lowered, and multiple lifting blocks (24) are provided on the lifting frame (23) to lift the center of gravity of the car door (7) through the multiple lifting blocks (24); The support mechanism (3) includes at least one support unit, and the positioning mechanism (4) includes at least two positioning units. Each support unit and each positioning unit are arranged around the lifting mechanism (2). The support unit includes a rotatable support frame (31), on which a support block (32) is provided to support the door (7); The positioning unit includes a positioning frame (41) that can slide in the left-right direction, the front-back direction and the vertical direction respectively. The positioning frame (41) is provided with a positioning pin (42). The positioning pin (42) cooperates with the positioning hole of the door (7) to achieve the positioning of the door (7). The guiding mechanism (6) includes multiple guiding units distributed around the periphery of the base (1). The guide blocks (62) of the multiple guiding units contact the edge of the door (7) to guide the vertical movement of the door (7).

3. A multi-vehicle door centering device as described in claim 2, characterized in that: The centering device further includes a detection unit, which includes several position sensors. At least one support unit and at least one positioning unit are respectively provided with position sensors. Each hinge correction unit is provided with a position sensor. The position sensors in the hinge correction unit are set on the correction frame (52) and located on one side of the fixed correction block (53).

4. A multi-vehicle door centering device as described in claim 2, characterized in that: The bottom of the positioning pin (42) is provided with a positioning support column (43), the top diameter of the positioning support column (43) is larger than the bottom diameter of the positioning pin (42), and the top surface of the positioning support column (43) forms a positioning support surface (44) on the periphery of the positioning pin (42).

5. A multi-vehicle door centering device as described in claim 2, characterized in that: The positioning unit also includes three modules, namely a first module (45), a second module (46), and a third module (47). The first module (45) is mounted on the base (1). The first slider (48) of the first module (45) can slide left and right under the drive of the first module (45). The second module (46) is mounted on the first slider (48) of the first module (45) through a first adapter plate (49). The second slider (410) of the second module (46) can slide back and forth under the drive of the second module (46). The third module (47) is mounted on the second slider (410) of the second module (46) through a second adapter plate (411). The third slider (412) of the third module (47) can slide vertically under the drive of the third module (47). The positioning frame (41) of the positioning unit is mounted on the third slider (412).

6. A multi-vehicle door centering device as described in claim 5, characterized in that: The base (1) has a first auxiliary support structure on one side of the first module (45), which provides sliding support for the first adapter plate (49). The first adapter plate (49) has a second auxiliary support structure on one side of the second module (46), which provides sliding support for the second adapter plate (411).

7. A multi-vehicle door centering device as described in claim 2, characterized in that: The support unit also includes a support base (33) and a support swing arm cylinder (34). The support base (33) is fixedly installed on the base (1), the cylinder body of the support swing arm cylinder (34) is installed on the support base (33), and the support frame (31) is fixedly installed on the swing arm of the support swing arm cylinder (34).

8. A multi-vehicle door centering device as described in claim 1, characterized in that: In the hinge correction unit, the correction frame (52) is slidably mounted on the base (1) via the fourth module (55). The fourth module (55) is mounted on the base (1). The fourth slider (56) of the fourth module (55) can slide horizontally under the drive of the fourth module (55). The sliding direction of the fourth slider (56) is parallel to the axis of the hinge shaft (72) of the hinge (71) on the door (7). The bottom of the correction frame (52) is fixedly mounted on the fourth slider (56) of the fourth module (55).

9. A multi-vehicle door centering device as described in claim 1, characterized in that: The hinge correction unit also includes a correction arm cylinder (51), the cylinder body of which is mounted on the correction frame (52), and the movable correction block (54) is fixedly mounted on the arm of the correction arm cylinder (51).

10. A multi-vehicle door centering device as described in claim 1, characterized in that: The base (1) has several support legs (11) at its bottom. The bottom of the support legs (11) is connected to the support base plate (13) through a connecting plate (12). The support base plate (13) is fixedly supported on the ground. A vertical leveling bolt (14) is threaded onto the support leg (11). A support groove matching the shape of the bottom of the leveling bolt (14) is opened on the top surface of the support base plate (13). A threaded hole (15) is opened on the support base plate (13) below the support groove. A guide bolt is threaded into the threaded hole (15) of the support base plate (13). The bottom of the leveling bolt (14) is pressed against the support groove of the support base plate (13). The leveling bolt (14) is a hollow bolt. The center hole of the adjusting bolt is fitted outside the guide bolt.

Images