Multi-hole-site positioning pin limiting assembly and vehicle body carrier

Abstract

The utility model discloses a multi-hole-site positioning pin limiting assembly and a vehicle body carrier. A pin seat is provided with a plurality of adjacent insertion holes; a limiting protruding block is arranged on the outer side of the middle of the positioning pin, and a first axial limiting structure is arranged at the inserting hole. The limiting assembly comprises a second axial limiting structure which is movably mounted on the pin seat and is provided with limiting parts in one-to-one correspondence with the insertion holes; the elastic reset element is used for elastically connecting the pin seat with the second axial limiting structure; under the elastic force effect of the elastic reset element, the limiting part is located at the first position, and the limiting part and the first axial limiting structure limit the axial freedom degree of the positioning pin in the insertion hole in the direction of the two axial ends of the limiting protruding block correspondingly. Under the action of external force, the elastic force of the elastic reset element is overcome, so that the second axial limiting structure moves relative to the pin seat, the limiting part is located at the second position, and the limiting part and the insertion axis of the positioning pin are spaced by a preset distance to avoid the movement path of the positioning pin along the insertion axis; and rapid limiting and limiting releasing of the axial freedom degree of the positioning pins corresponding to the multiple insertion holes are achieved.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, and in particular to a multi-hole positioning pin limiting component and a vehicle body. Background Technology

[0002] As the automotive manufacturing industry accelerates its transformation towards flexibility, the co-production of multiple platform models on the same line has become a core requirement for enhancing companies' market competitiveness. Existing technologies enable rapid switching between different platform models by setting multiple locating pin mounting holes on the vehicle corresponding to different platform models, allowing a single production line to be compatible with multiple models.

[0003] Currently, the connection method between the locating pin and the carrier takes a lot of time during installation and disassembly. For example, if the locating pin is fixed by a threaded connection, when replacing the locating pin, the current locating pin needs to be removed and then the new locating pin needs to be installed on the corresponding hole. This operation method is not only labor-intensive, but also has a long cycle time for replacing the pin. Utility Model Content

[0004] In response to the shortcomings of the existing production technology, the applicant provides a multi-hole positioning pin limiting component and vehicle body, thereby enabling rapid limiting and release of the axial degree of freedom of the positioning pins corresponding to multiple holes, shortening the cycle time of pin replacement, and reducing labor intensity.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A multi-hole positioning pin limiting assembly is provided on a vehicle. The pin seat of the vehicle is provided with multiple adjacent insertion holes. Different insertion holes are used to install positioning pins for different vehicle body models.

[0007] A limiting protrusion is provided on the outer side of the middle part of the positioning pin, and a first axial limiting structure is provided at the insertion hole to limit the insertion depth of the positioning pin;

[0008] The limiting component includes:

[0009] The second axial limiting structure is movably mounted on the pin seat and is provided with limiting parts that correspond one-to-one with the insertion holes;

[0010] An elastic reset element elastically connects the pin seat to the second axial limiting structure;

[0011] Under the elastic force of the elastic reset element, the limiting part is located in the first position. The limiting part and the first axial limiting structure restrict the axial degree of freedom of the positioning pin in the insertion hole from both ends of the limiting protrusion. Under the action of external force, the elastic force of the elastic reset element is overcome, and the second axial limiting structure moves relative to the pin seat, so that the limiting part is located in the second position. The limiting part is spaced at a predetermined distance from the insertion axis of the positioning pin, avoiding the movement path of the positioning pin along the insertion axis.

[0012] As a further improvement to the above technical solution:

[0013] The limiting component further includes a rotating pin assembly on which the second axial limiting structure is rotatably mounted to the pin seat. An external force drives the second axial limiting structure to swing around the central axis of the rotating pin assembly, so that the limiting part is located in the second position.

[0014] The rotating pin assembly includes a rotating shaft, one end of which is fixedly connected to a second axial limiting structure. The middle part of the rotating shaft passes through a shaft hole on a pin seat. A retaining ring is fixedly installed at the other end of the rotating shaft to axially limit the rotating shaft, so that the middle part of the rotating shaft is rotatably connected to the shaft hole.

[0015] The limiting assembly also includes a swing arm, one end of which is fixedly connected to the second axial limiting structure, and the other end of which is provided with a force-bearing handle. One end of the elastic reset element is fixedly connected to the pin seat, and the other end of the elastic reset element is fixedly connected to the middle of the swing arm.

[0016] The pin seat is provided with a stop block, which is used to limit the swing angle of the swing arm under the elastic force of the elastic reset element, so that the limiting part is in the first position.

[0017] The elastic reset element is a helical spring.

[0018] A limiting sleeve is provided inside the insertion hole. The end face of the limiting sleeve is a first axial limiting structure. When the first axial limiting structure contacts the limiting protrusion, it limits the insertion depth of the positioning pin.

[0019] The positioning pin includes a shaft segment, one end of which is a positioning part that matches a positioning hole on the vehicle body. The middle part of the shaft segment is provided with the limiting protrusion, and the side of the limiting protrusion is provided with a first lateral limiting surface.

[0020] The first axial limiting structure is located in the insertion hole and forms a stepped structure with the end of the insertion hole. The two sides of the end of the limiting sleeve are symmetrically provided with support blocks that contact the pin seat surface. The central hole of the limiting sleeve matches the diameter of the shaft segment. The support block is provided with a second lateral limiting surface. The first lateral limiting surface contacts the second lateral limiting surface to restrict the degree of freedom of the positioning pin in the rotation direction.

[0021] The support block is provided with a guide slope, and the other end of the shaft segment is provided with a guide cone surface corresponding to the guide slope.

[0022] A vehicle body includes the multi-hole positioning pin limiting assembly described in any of the preceding claims.

[0023] The beneficial effects of this utility model are as follows:

[0024] This utility model has a compact and reasonable structure and is easy to operate. A first axial limiting structure is set at the insertion hole to limit the insertion depth of the positioning pin along one axis. A second axial limiting structure outside the insertion hole is provided with multiple limiting parts to limit the positioning pin from another axis. The second axial limiting structure is driven by external force to overcome the elastic force of the elastic reset element and move, while changing the position of multiple limiting parts relative to the corresponding insertion hole. The elastic reset element resets the positioning pin, realizing the restriction and release of the freedom of the positioning pin in the direction of the insertion hole. This enables the rapid limiting and release of the axial freedom of the positioning pin corresponding to multiple insertion holes, shortens the cycle of pin replacement, and reduces labor intensity.

[0025] In addition, this utility model also has the following advantages:

[0026] (1) By setting a rotating pin assembly in the middle of the distribution area of ​​multiple sockets, the second axial limiting structure is rotatably connected to the pin seat and swings perpendicular to the axis of the positioning pin. Multiple limiting parts simultaneously approach and move away from the central axis of the socket from the side of the positioning pin, reducing the installation space of the limiting assembly and facilitating the pin replacement operation.

[0027] (2) A swing arm is provided on the second axial limiting structure so that the part of the second axial limiting structure and the external force are extended out of the distribution area of ​​the insertion hole, which facilitates operation and avoids the movement space of the positioning pin.

[0028] (3) The limiting sleeve integrates the axial limiting, radial limiting and guiding structure of the positioning pin into one unit. The separate design and assembly of the limiting sleeve and the insertion hole facilitates the processing of the limiting and guiding structure at the insertion hole. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of this utility model (when the carrier is a lifting device).

[0030] Figure 2 This is a schematic diagram of the structure of the multi-hole positioning pin limiting component of this utility model.

[0031] Figure 3 This is a schematic diagram of the multi-hole positioning pin limiting component of this utility model (from another perspective).

[0032] Figure 4This is a partial cross-sectional view (at the insertion hole) of the multi-hole positioning pin limiting component of this utility model.

[0033] Figure 5 This is a partial cross-sectional view (at the rotating pin assembly) of the multi-hole positioning pin limiting assembly of this utility model.

[0034] Figure 6 This is a schematic diagram of the structure of the limiting sleeve of this utility model.

[0035] Figure 7 This is a schematic diagram of the positioning pin of this utility model.

[0036] Figure 8 A structural diagram showing the external force provided by the actuator (when the carrier is a lifting device).

[0037] Figure 9 for Figure 8 Enlarged view of a portion of point A in the middle.

[0038] Figure 10 This is a structural diagram when the external force is provided by the actuator (when the vehicle is a skid).

[0039] in:

[0040] 1. Limiting assembly; 11. Rotary pin assembly; 111. Rotating shaft; 112. Copper sleeve; 113. Retaining ring; 114. Anti-loosening nut; 12. Second axial limiting structure; 121. Limiting part; 13. Swing arm; 14. Elastic reset element; 15. Stop block;

[0041] 2. Vehicle; 3. Pin seat;

[0042] 4. Insertion hole; 41. First axial limiting structure; 42. Limiting sleeve; 43. Support block; 431. Second lateral limiting surface; 432. Guide slope;

[0043] 5. Locating pin; 51. Locating part; 52. Shaft segment; 53. Protrusion; 531. First limiting surface; 532. Second limiting surface; 533. First lateral limiting surface; 54. Guide cone surface;

[0044] 6. Driver; 61. Mobile device. Detailed Implementation

[0045] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0046] Example 1:

[0047] like Figures 1-3As shown, in this embodiment, the multi-hole positioning pin limiting assembly is mounted on the carrier 2. The carrier 2 has multiple adjacent insertion holes 4 on the pin seat 3. Different insertion holes 4 are used to install positioning pins 5 to correspond to different models of car bodies.

[0048] A limiting protrusion 53 is provided on the outer side of the middle part of the positioning pin 5, and a first axial limiting structure 41 is provided at the insertion hole 4 to limit the insertion depth of the positioning pin 5.

[0049] Limiting component 1 includes:

[0050] The second axial limiting structure 12 is movably mounted on the pin seat 3, and the second axial limiting structure 12 is provided with limiting parts 121 that correspond one-to-one with the insertion holes 4.

[0051] The elastic reset element 14 elastically connects the pin seat 3 to the second axial limiting structure 12.

[0052] Under the elastic force of the elastic reset element 14, the limiting part 121 is located in the first position. The limiting part 121 and the first axial limiting structure 41 restrict the axial degree of freedom of the positioning pin 5 in the insertion hole 4 from both ends of the limiting protrusion 53. Under the action of external force, the elastic force of the elastic reset element 14 is overcome, and the second axial limiting structure 12 moves relative to the pin seat 3, so that the limiting part 121 is located in the second position. The limiting part 121 is spaced at a predetermined distance from the insertion axis of the positioning pin 5, avoiding the movement path of the positioning pin 5 along the insertion axis.

[0053] Different sockets 4 are used to install positioning pins 5 to correspond to different car body models, making a single production platform compatible with different platform models. In the automobile production line, the carrier 2 is part of the car body conveyor line and is used to carry the car body. The replacement of positioning pins 5 can be carried out at a fixed pin-changing station. The pin-changing station is a specific station node in the car body conveyor line. The pins of the carrier 2 at the pin-changing station are changed according to the car body model produced by the production line.

[0054] The locating pin 5, which typically needs to be replaced, is located at one end of the vehicle's length direction and is symmetrically distributed about the vehicle's central axis. Therefore, the limiting assembly 1 is located at one end of the vehicle 2's length direction, and there are two sets, symmetrically distributed about the vehicle's central axis. The vehicle 2 can be a lifting device or a skid, such as... Figure 8 As shown, when the carrier 2 is a lifting device, the limiting component 1 can be installed on the front support of the lifting device.

[0055] When the carrier 2 needs to replace the pin and the replacement is done manually, the operator pushes the second axis axial limiting structure 12 to overcome the elastic force of the elastic reset element 14 and move the limiting part 121 to the second position, avoiding the movement path of the positioning pin 5 along the insertion axis. The predetermined distance between the limiting part 121 and the insertion axis of the positioning pin 5 can be controlled by manually controlling the movement amplitude of the limiting part 121, or a limiting post can be set on the pin seat 3 so that the limiting part 121 is in the second position after the second axis limiting structure 12 touches the limiting post.

[0056] After the current positioning pin 5 is removed, a new positioning pin 5 is inserted into another socket 4. After the positioning pin 5 contacts the first axial limiting structure 41 at the socket 4, the insertion depth of the positioning pin 5 is limited.

[0057] Then, after the second axial limiting structure 12 is released, under the elastic force of the elastic reset element 14, the limiting part 121 is reset and located in the first position. The limiting part 121 and the first axial limiting structure 41 restrict the axial degree of freedom of the positioning pin 5 in the insertion hole 4 from both ends of the limiting protrusion 53.

[0058] The first axial limiting structure 41 can be the bottom plane of the insertion hole 4 to limit the insertion depth of the positioning pin 5. The first axial limiting structure 41 can also be the surface of the pin seat 3, and the surface of the pin seat 3 contacts the first limiting surface 531 of the limiting protrusion 53 to limit the insertion depth of the positioning pin 5.

[0059] The second axial limiting structure 12 is installed on the outside of the insertion hole 4. The limiting part 121 is located above the second limiting surface 532 of the limiting protrusion 53 and has a predetermined gap, ensuring that the second axial limiting structure 12 can move above the second limiting surface 532 and limit the limiting protrusion 53 between the first axial limiting structure 41 and the limiting part 121, so that the positioning pin 5 does not disengage from the insertion hole 4.

[0060] A first axial limiting structure 41 is provided at the insertion hole 4 to limit the insertion depth of the positioning pin 5 along one axis. Multiple limiting parts 121 are provided on the second axial limiting structure 12 outside the insertion hole 4 to limit the positioning pin 5 from another axis. The second axial limiting structure 12 is driven by external force to overcome the elastic force of the elastic reset element 14 and move. At the same time, the positions of the multiple limiting parts 121 relative to the corresponding insertion hole 4 are changed. The elastic force of the elastic reset element 14 is used to reset, thereby realizing the restriction and release of the axial degree of freedom of the positioning pin 5 from the insertion hole 4. This achieves rapid limiting and release of the axial degree of freedom of the positioning pin corresponding to the multiple insertion holes 4, shortens the cycle of pin replacement, and reduces labor intensity.

[0061] A single action can release the axial limit of the positioning pin 5 at one socket 4 and simultaneously avoid other sockets 4, thus improving operational efficiency.

[0062] Example 2:

[0063] Based on Embodiment 1, the multi-hole positioning pin limiting component of this embodiment, such as... Figure 5 As shown, the limiting component 1 also includes a rotating pin assembly 11 on which the second axial limiting structure 12 is rotatably mounted on the pin seat 3. An external force drives the second axial limiting structure 12 to swing around the central axis of the rotating pin assembly 11, so that the limiting part 121 is in the second position.

[0064] One end of the rotating pin assembly 11 is fixedly connected to the second axial limiting structure 12, and the other end of the rotating pin assembly 11 is rotatably connected to the pin seat 3; the insertion holes 4 are distributed in a circular area centered on the rotating pin assembly 11; the second axial limiting structure 12 is plate-shaped in general, and a notch is provided between two adjacent limiting parts 121 to avoid the positioning pin 5. The distance between the end of the limiting part 121 and the central axis of the rotating pin assembly 11 is related to the relative position of the insertion holes 4; the swing plane of the second axial limiting structure 12 is perpendicular to the axis of the positioning pin 5.

[0065] like Figure 5 As shown, the rotating pin assembly 11 includes a rotating shaft 111. One end of the rotating shaft 111 is fixedly connected to the second axial limiting structure 12. The middle part of the rotating shaft 111 passes through the shaft hole on the pin seat 3. The other end of the rotating shaft 111 is fixedly installed with a retaining ring 113 to axially limit the rotating shaft 111, so that the middle part of the rotating shaft 111 is rotatably connected to the shaft hole.

[0066] like Figure 5 As shown, a copper sleeve 112 is provided in the shaft hole, and the copper sleeve 112 contacts the outer surface of the rotating shaft 111. An anti-loosening nut 114 is installed at the end of the rotating shaft 111. A retaining ring 113 is provided between the anti-loosening nut 114 and the pin seat 3. There is an installation gap between the retaining ring 113 and the pin seat 3, which ensures that the rotating shaft 111 can rotate in the copper sleeve 112 while restricting the position of the second axial limiting structure 12 along the axial direction of the positioning pin 5, thereby enabling axial limiting of the positioning pin 5.

[0067] By setting a rotating pin assembly 11 in the middle of the distribution area of ​​multiple sockets 4, the second axial limiting structure 12 is rotatably connected to the pin seat 3 and swings perpendicular to the axis of the positioning pin 5. Multiple limiting parts 121 simultaneously approach and move away from the central axis of the socket 4 from the side of the positioning pin 5, reducing the installation space of the limiting assembly 1 and facilitating the pin replacement operation.

[0068] The number of sockets 4 is configured according to the number of vehicle body models that need to be matched.

[0069] like Figure 2 , Figure 3As shown, the limiting assembly 1 also includes a swing arm 13. One end of the swing arm 13 is fixedly connected to the second axial limiting structure 12, and the other end of the swing arm 13 is provided with a force-bearing handle. One end of the elastic reset element 14 is fixedly connected to the pin seat 3, and the other end of the elastic reset element 14 is fixedly connected to the middle part of the swing arm 13.

[0070] A swing arm 13 is provided on the second axial limiting structure 12 so that the part of the second axial limiting structure 12 that acts on the external force extends out of the distribution area of ​​the insertion hole 4, which facilitates operation and avoids the movement space of the positioning pin 5.

[0071] like Figure 2 , Figure 3 As shown, a stop 15 is provided on the pin seat 3. The stop 15 is used to limit the swing angle of the swing arm 13 under the elastic force of the elastic reset element 14, so that the limiting part 121 is in the first position.

[0072] When there is no positioning pin 5 in the socket 4, the elastic reset element 14 is always stretched under the limiting action of the stop block 15, so that the limiting part 121 is in the first position when the limiting component 1 is in the free state.

[0073] The elastic reset element 14 is a helical spring.

[0074] When the carrier 2 moves with the conveyor line, the elastic force of the elastic reset element 14 keeps the limiting component 1 in the limiting state.

[0075] like Figure 4 , Figure 7 As shown, the limiting protrusion 53 has a first limiting surface 531 and a second limiting surface 532 respectively at its two axial ends. The limiting part 121 corresponds to the first limiting surface 531, and the first axial limiting structure 41 corresponds to the second limiting surface 532. When the limiting part 121 is in the second position, the limiting protrusion 53 is located between the limiting part 121 and the first axial limiting structure 41.

[0076] Specifically, the first limiting surface 531 is located on one side of the shaft segment 52 of the positioning pin 5, ensuring that when the second axial limiting structure 12 swings, it has the swing space of the limiting part 121, under the condition that the limiting part 121 has a limiting effect on the limiting protrusion 53; under the condition of ensuring the support strength of the limiting protrusion 53, the local position of the limiting protrusion 53 is thinned to reduce the distance between the first limiting surface 531 and the surface of the pin seat 3.

[0077] Example 3:

[0078] Based on the above embodiments, when the positioning part 51 of the positioning pin 5 is not a rotating body, it is necessary to limit the horizontal placement of the positioning pin 5. For example... Figures 4-7As shown, in this embodiment, the multi-hole positioning pin limiting assembly has a limiting sleeve 42 inside the insertion hole 4. The end face of the limiting sleeve 42 is a first axial limiting structure 41. When the first axial limiting structure 41 contacts the limiting protrusion 53, it limits the insertion depth of the positioning pin 5.

[0079] The positioning pin 5 includes a shaft segment 52, one end of which is a positioning part 51 that matches the positioning hole on the vehicle body. A limiting protrusion 53 is provided in the middle of the shaft segment 52, and a first lateral limiting surface 533 is provided on the side of the limiting protrusion 53.

[0080] The first axial limiting structure 41 is located in the insertion hole 4 and forms a stepped structure with the end of the insertion hole 4. The two sides of the end of the limiting sleeve 42 are symmetrically provided with support blocks 43 that contact the surface of the pin seat 3. The central hole of the limiting sleeve 42 matches the diameter of the shaft section 52. The support block 43 is provided with a second lateral limiting surface 431. The first lateral limiting surface 533 contacts the second lateral limiting surface 431, restricting the degree of freedom of the rotation direction of the positioning pin 5.

[0081] When the positioning pin 5 is inserted into the insertion hole 4, the second limiting surface 532 of the limiting protrusion 53 contacts the first axial limiting structure 41, limiting the insertion depth of the positioning pin 5.

[0082] The insertion hole 4 is a light hole. A limiting sleeve 42 is installed in the insertion hole 4. The support block 43 contacts the pin seat 3 to achieve axial positioning of the support block 43 and the pin seat 3. The support block 43 bears the insertion force of the positioning pin 5.

[0083] like Figure 6 As shown, the support block 43 is provided with a guide slope 432, and the other end of the shaft segment 52 is provided with a guide cone surface 54 corresponding to the guide slope 432. When the positioning pin 5 is inserted into the insertion hole 4, the guide cone surface 54 plays a guiding role.

[0084] The limiting sleeve 42 integrates the axial limiting, radial limiting and guiding structure of the positioning pin 5. The separate design of the limiting sleeve 42 and the insertion hole 4 facilitates the processing of the limiting and guiding structure at the insertion hole 4.

[0085] Example 4:

[0086] The vehicle body of this embodiment includes the multi-hole positioning pin limiting assembly of any of the above embodiments.

[0087] When carrier 2 replaces positioning pin 5 at the pin-changing station, if Figures 8-10As shown, a driver 6 fixedly installed at the pin-changing station can also be used. The moving end 61 of the driver 6 applies external force to the swing arm 13, pushing the swing arm 13 to swing against the elastic force of the elastic reset element 14, thereby achieving the switching between the limit state and the avoidance state of the automatic switching limit component 1 at the pin-changing station, improving the automation level of the production line. The driver 6 can be a pneumatic cylinder or a hydraulic cylinder, and the moving end 61 is the end of a piston rod.

[0088] like Figure 8 , Figure 9 As shown, when the carrier 2 is a vehicle body lifting device, the driver 6 is located in the middle of the vehicle body conveying line. There are two sets of drivers 6, which act from the middle of the lifting device on the swing arms 13 in the multi-hole positioning pin limiting assembly 1 on the corresponding side.

[0089] like Figure 10 As shown, when the vehicle 2 is a skid, the driver 6 is located on both sides of the vehicle body conveyor line. There are two sets of drivers 6, which act on the swing arms 13 in the multi-hole positioning pin limit assembly 1 on the corresponding sides of the skid from both sides.

[0090] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A multi-hole positioning pin limiting assembly, characterized in that: The limiting component is set on the carrier (2), and the carrier (2) has multiple adjacent insertion holes (4) on the pin seat (3). Different insertion holes (4) are used to install positioning pins (5) to correspond to different models of car bodies. A limiting protrusion (53) is provided on the outer side of the middle part of the positioning pin (5), and a first axial limiting structure (41) is provided at the insertion hole (4) to limit the insertion depth of the positioning pin (5). The limiting component (1) includes: The second axial limiting structure (12) is movably installed on the pin seat (3) and is provided with limiting parts (121) corresponding one-to-one with the insertion hole (4). The elastic reset element (14) elastically connects the pin seat (3) to the second axial limiting structure (12); Under the elastic force of the elastic reset element (14), the limiting part (121) is located in the first position. The limiting part (121) and the first axial limiting structure (41) restrict the axial degree of freedom of the positioning pin (5) in the insertion hole (4) from both ends of the limiting protrusion (53). Under the action of external force, the elastic force of the elastic reset element (14) is overcome, and the second axial limiting structure (12) moves relative to the pin seat (3), so that the limiting part (121) is located in the second position. The insertion axis of the limiting part (121) and the positioning pin (5) are spaced apart by a predetermined distance, avoiding the movement path of the positioning pin (5) along the insertion axis.

2. The multi-hole positioning pin limiting assembly as described in claim 1, characterized in that: The limiting component (1) further includes a rotating pin assembly (11) on which the second axial limiting structure (12) is rotatably mounted on the pin seat (3). An external force drives the second axial limiting structure (12) to swing around the central axis of the rotating pin assembly (11), so that the limiting part (121) is in the second position.

3. The multi-hole positioning pin limiting assembly as described in claim 2, characterized in that: The rotating pin assembly (11) includes a rotating shaft (111). One end of the rotating shaft (111) is fixedly connected to the second axial limiting structure (12). The middle part of the rotating shaft (111) passes through the shaft hole on the pin seat (3). The other end of the rotating shaft (111) is fixedly installed with a retaining ring (113) to axially limit the rotating shaft (111), so that the middle part of the rotating shaft (111) is rotatably connected to the shaft hole.

4. The multi-hole positioning pin limiting assembly as described in claim 1, characterized in that: The limiting component (1) also includes a swing arm (13), one end of which is fixedly connected to the second axial limiting structure (12), the other end of which is provided with a force-bearing handle, one end of the elastic reset element (14) is fixedly connected to the pin seat (3), and the other end of the elastic reset element (14) is fixedly connected to the middle part of the swing arm (13).

5. The multi-hole positioning pin limiting assembly as described in claim 2, characterized in that: A stop (15) is provided on the pin seat (3). The stop (15) is used to limit the swing angle of the swing arm (13) under the elastic force of the elastic reset element (14), so that the limiting part (121) is in the first position.

6. The multi-hole positioning pin limiting assembly as described in any one of claims 1-5, characterized in that: The elastic reset element (14) is a helical spring.

7. The multi-hole positioning pin limiting assembly as described in claim 1, characterized in that: A limiting sleeve (42) is provided inside the insertion hole (4). The end face of the limiting sleeve (42) is a first axial limiting structure (41). When the first axial limiting structure (41) contacts the limiting protrusion (53), it limits the insertion depth of the positioning pin (5).

8. The multi-hole positioning pin limiting assembly as described in claim 7, characterized in that: The positioning pin (5) includes a shaft segment (52), one end of which is a positioning part (51) that matches the positioning hole on the vehicle body. The middle part of the shaft segment (52) is provided with the limiting protrusion (53), and the side of the limiting protrusion (53) is provided with a first lateral limiting surface (533). The first axial limiting structure (41) is located in the insertion hole (4) and forms a stepped structure with the end of the insertion hole (4). The two sides of the end of the limiting sleeve (42) are symmetrically provided with support blocks (43) that contact the surface of the pin seat (3). The central hole of the limiting sleeve (42) matches the diameter of the shaft segment (52). The support block (43) is provided with a second lateral limiting surface (431). The first lateral limiting surface (533) contacts the second lateral limiting surface (431) to restrict the degree of freedom of the rotation direction of the positioning pin (5).

9. The multi-hole positioning pin limiting assembly as described in claim 8, characterized in that: The support block (43) is provided with a guide slope (432), and the other end of the shaft segment (52) is provided with a guide cone surface (54) corresponding to the guide slope (432).

10. A vehicle-mounted vehicle, characterized in that: Includes the multi-hole positioning pin limiting assembly as described in any one of claims 1-9.

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