Car door limiting device

Abstract

The utility model relates to the technical field of vehicle door machining equipment, in particular to a vehicle door limiting device which comprises a rack, the rack is provided with a containing structure, a profiling limiting structure and a vehicle door clamping mechanism, the profiling limiting structure is located on the periphery of the vehicle door clamping mechanism, and an in-place detection piece is arranged at the position of the rack and / or the vehicle door clamping mechanism. A limiting assembly is further arranged on the rack and / or the vehicle door clamping mechanism. According to the automobile door limiting device, an automobile door can be stably placed and clamped, and the limiting efficiency of the automobile door is improved.

Description

A door limiting device Technical Field

[0001] This utility model relates to the technical field of car door processing equipment, and more specifically, to a car door limiting device. Background Technology

[0002] In the automotive manufacturing industry, there is a process involving the assembly and processing of car doors. During this process, the doors need to be placed stably to prevent displacement that could affect the quality of the work. Therefore, the accuracy and stability of door limiting devices are crucial for ensuring the quality of door assembly. Currently, most door limiting devices on the market use clamping devices to hold the doors in place and prevent displacement during operation. However, this type of device requires the door to be positioned in the correct position with the clamping device open before it can be activated to clamp the door. This means that before the clamping device activates, the door may fall or be easily displaced by impact, making it difficult for the clamping device to perform its clamping action effectively, thus hindering the improvement of limiting efficiency. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the low limiting efficiency of existing car doors and to provide a car door limiting device that can stably place and clamp the car door, thereby improving the limiting efficiency of the car door.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A door limiting device is provided, including a frame, the frame having a placement structure, a contour limiting structure, and a door clamping mechanism, the contour limiting structure being located at the periphery of the door clamping mechanism, the frame and / or the door clamping mechanism having an arrival detection element, and the frame and / or the door clamping mechanism also having a limiting component.

[0006] This utility model discloses a door limiting device. The placement structure and the contour limiting structure are designed to stably place and limit the door before the clamping action, preventing unnecessary displacement of the door and preventing the door from falling off, thus improving the limiting efficiency of the door. The limiting component is designed to limit the placement of the door, the door clamping mechanism is designed to clamp the stably placed door, and the positioning detection component is designed to detect whether a door is placed at the door clamping mechanism.

[0007] Preferably, the contour-following limiting structure includes a first contour-following limiting block group and a second contour-following limiting block group, and the door clamping mechanism is located between the first contour-following limiting block group and the second contour-following limiting block group; wherein, the first contour-following limiting block group includes a first limiting block and a second limiting block located below the first limiting block, the side of the first limiting block near the door clamping mechanism is a first contour-following surface, and the side of the second limiting block near the door clamping mechanism is a second contour-following surface.

[0008] Preferably, the contour-following limiting structure further includes a first position adjusting frame and a second position adjusting frame. The first limiting block is connected to the fixed end of the door clamping mechanism through the first position adjusting frame, and the second limiting block is connected to the frame through the second position adjusting frame.

[0009] Preferably, the placement structure includes a plurality of placement blocks connected to the frame, the placement blocks being located below the contour limiting structure, and the side of the placement block closest to the door clamping mechanism being the fifth contour surface.

[0010] Preferably, the door clamping mechanism includes a first clamping component, a second clamping component, a third clamping component, and a fourth clamping component connected to the frame. The first clamping component is located above the second clamping component, and the third clamping component is located above the fourth clamping component. The positioning detection element is provided at any one or more of the first clamping component, the second clamping component, the third clamping component, and the fourth clamping component.

[0011] Preferably, the first clamping assembly includes a first clamping structure, a first mounting member, and a first driving member. The first clamping structure includes a first clamping part and a second clamping part, wherein the second clamping part is connected to the frame through the first mounting member, the first clamping part is hinged to the first mounting member, and the first clamping part is movably connected to the first mounting member through the first driving member. The first driving member can drive the first clamping part and the second clamping part to perform alignment clamping. The first mounting member is also connected to a first abutment part.

[0012] Preferably, the limiting component includes a limiting pin and a third position adjusting bracket, wherein the limiting pin is connected to the fixed end of the door clamping mechanism through the third position adjusting bracket.

[0013] Preferably, the door limiting device further includes a rivet detection mechanism connected to the frame. The rivet detection mechanism includes a second mounting base, a trigger connected to the second mounting base, and an elastic contact assembly. One end of the elastic contact assembly abuts against the trigger end of the trigger, and the other end is used for contact detection with the rivet bolt.

[0014] Preferably, the frame includes a base frame, a mounting bracket connected to the base frame, and support legs. The placement structure is connected to the base frame, and the door clamping mechanism is connected to the mounting bracket. The mounting bracket is provided with clearance for the operation of the door clamping mechanism.

[0015] Preferably, the frame is provided with lifting lugs; and / or: the frame is provided with forklift connectors.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The placement structure and contour limiting structure are designed to ensure the stable placement and limiting of the car door before the clamping action, preventing unnecessary displacement of the car door and preventing the car door from falling off, thus improving the limiting efficiency of the car door; the limiting component is designed to limit the placement of the car door, the car door clamping mechanism is designed to clamp the stably placed car door, and the position detection component is designed to detect whether a car door is placed at the car door clamping mechanism.

[0018] 2. The setting of the first position adjustment bracket and the second position adjustment bracket enables the contour limiting structure to limit the door of different car models;

[0019] 3. The rivet detection mechanism can be used to detect whether the current door has been installed with rivet bolts, so as to avoid defective products caused by missing rivet bolts. Attached Figure Description

[0020] Figure 1 is a structural schematic diagram of a door limiting device according to the present invention from a frontal view.

[0021] Figure 2 is a structural schematic diagram of a door limiting device according to this utility model from another perspective;

[0022] Figure 3 is an enlarged schematic diagram of part I in Figure 2;

[0023] Figure 4 is a partial structural schematic diagram of a door limiting device according to this utility model;

[0024] Figure 5 is a structural schematic diagram of a third embodiment of a door limiting device according to this utility model;

[0025] Figure 6 is a structural schematic diagram of the riveting detection mechanism of this utility model;

[0026] Figure 7 is a diagram of the usage state of a door limiting device according to the present invention from the main view.

[0027] Figure 8 is a diagram showing the usage state of the inner panel of the door limiting device of this utility model.

[0028] Figure 9 is a diagram showing the usage status of a door limiting device of this utility model from a rear view.

[0029] In the attached diagram: 100, frame; 110, base frame; 120, mounting bracket; 121, clearance space; 130, support leg; 140, reinforcing structure; 150, placement structure; 151, fifth contouring surface; 161, lifting lug; 162, forklift connector; 170, air source distributor; 180, air control valve; 200, contouring limiting structure; 210, first limiting block; 211, first contouring surface; 220, second... Limiting block; 221, Second contoured surface; 230, Third limiting block; 240, Fourth limiting block; 250, First position adjusting bracket; 251, First connecting hole; 260, Second position adjusting bracket; 300, First clamping assembly; 310, First clamping part; 311, First clamping block; 312, Movable block; 320, Second clamping part; 330, First mounting component; 331, First mounting base; 332, Mounting Plate; 340, First driving component; 350, First abutting part; 351, Abutting block; 352, Fourth position adjusting frame; 400, Second clamping assembly; 410, Second clamping structure; 420, Second mounting component; 430, Second driving component; 440, Second abutting part; 500, Third clamping assembly; 510, Third clamping structure; 600, Fourth clamping assembly; 610, Fourth clamping structure; 700, Position detection component; 710, First limit switch; 720, Connecting piece; 800, Limiting assembly; 810, Limiting pin; 820, Third position adjusting frame; 900, Riveting detection mechanism; 910, Second mounting base; 920, Trigger; 930, Elastic contact assembly; 931, Contact pin; 932, Housing; 933, Spring locking sleeve; 101, Outer plate; 102, Inner plate; 103, Riveting bolt. Detailed Implementation

[0030] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0031] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0032] Example 1

[0033] Figures 1 to 4 show a first embodiment of a door limiting device of the present invention, including a frame 100. The frame 100 is provided with a placement structure 150, a contour limiting structure 200, and a door clamping mechanism. The contour limiting structure 200 is located on the periphery of the door clamping mechanism. The frame 100 and / or the door clamping mechanism are provided with an arrival detection element 700. The frame 100 and / or the door clamping mechanism are also provided with a limiting component 800.

[0034] The placement structure 150 and the contour limiting structure 200 are used to stably place and limit the door before the clamping action, to prevent unnecessary displacement of the door and to prevent the door from falling off, thereby improving the limiting efficiency of the door; the limiting component 800 is used to limit the placed door, the door clamping mechanism is used to clamp the stably placed door, and the position detection component 700 is used to detect whether a door is placed at the door clamping mechanism.

[0035] As shown in Figures 1 and 2, the frame 100 includes a base frame 110, a mounting frame 120, and support legs 130. The mounting frame 120 is vertically arranged and connected to the upper end of the base frame 110, while the support legs 130 are connected to the lower end of the base frame 110. It should be noted that multiple support legs 130 can be provided depending on the actual usage scenario, and the bottom surface of the support legs 130 can be set as a horizontal or inclined plane depending on the ground surface of the usage scenario. The placement structure 150 is connected to the base frame 110, and the door clamping mechanism is connected to the mounting frame 120. The mounting frame 120 is provided with a clearance 121 for the movement of the door clamping mechanism. To improve the stability of the frame 100, a reinforcing structure 140 is also connected between the mounting frame 120 and the base frame 110, wherein the reinforcing structure 140 may include at least one reinforcing rib.

[0036] As shown in Figures 1 and 2, a lifting lug 161 is connected to the top of the mounting frame 120 to enable the frame 100 to be lifted. A forklift connector 162 is also connected to the lower end of the base frame 110 to enable the frame 100 to be transported by forklift.

[0037] As shown in Figures 1 and 2, the contouring limiting structure 200 includes a first contouring limiting block group and a second contouring limiting block group, with the door clamping mechanism located between the first and second contouring limiting block groups. The first contouring limiting block group includes a first limiting block 210 and a second limiting block 220 located below the first limiting block 210. The side of the first limiting block 210 closest to the door clamping mechanism is a first contouring surface 211, and the side of the second limiting block 220 closest to the door clamping mechanism is a second contouring surface 221. The second contouring limiting block group includes a third limiting block 230 and a fourth limiting block 240 located below the third limiting block 230. The side of the third limiting block 230 closest to the door clamping mechanism is a third contouring surface, and the side of the fourth limiting block 240 closest to the door clamping mechanism is a fourth contouring surface. Specifically, each contouring surface can be configured as one or more of the following: an inclined surface, a vertical surface, or a curved surface, depending on the side of the door.

[0038] As shown in Figures 2 and 4, in order to enable the contouring limiting structure 200 to limit the doors of different car models, the contouring limiting structure 200 also includes a first position adjusting frame 250 and a second position adjusting frame 260. The first limiting block 210 is connected to the fixed end of the door clamping mechanism through the first position adjusting frame 250, and the second limiting block 220 is connected to the base frame 110 through the second position adjusting frame 260. In this embodiment, the third limiting block 230 is also connected to the fixed end of the door clamping mechanism through the first position adjusting frame 250, and the fourth limiting block 240 is connected to the base frame 110 through the second position adjusting frame 260.

[0039] Specifically, the first position adjustment frame 250 includes at least one connecting strip, and the first limiting block 210 is connected to the fixed end of the door clamping mechanism through the connecting strip. Preferably, the first position adjustment frame 250 includes multiple connecting strips, and multiple first connecting holes 251 are arranged on the connecting strips. The connecting strips are connected to each other through the first connecting holes 251, and the position of the connecting strips can be adjusted by connecting the first connecting holes 251 at different positions. Furthermore, the structure of the connecting strips can be set to one or more of straight segments and bent shapes, which can further improve the position adjustability of the first position adjustment frame 250, as shown in Figure 4. The second position adjustment frame 260 includes an adjustment seat and multiple second connecting holes arranged on the adjustment seat. The second limiting block 220 is connected to the adjustment seat through the second connecting holes, and the position adjustment of the second limiting block 220 can also be achieved by connecting the second connecting holes at different positions, as shown in Figure 2.

[0040] As shown in Figures 1 and 2, the placement structure 150 includes multiple placement blocks connected to the base frame 110. The placement blocks are located below the contour limiting structure 200, and the side of the placement block closest to the door clamping mechanism is the fifth contour surface 151. In this embodiment, the upper surface of the placement block is the fifth contour surface 151, which can be used to support the bottom of the door. Specifically, the fifth contour surface 151 can also be configured as one or more of the following: a slope, a horizontal surface, or a curved surface, depending on the bottom of the door.

[0041] The working principle of a door limiting device in this embodiment is as follows:

[0042] The car door to be processed is placed on the frame 100. The fifth contouring surface 151 of the placement block is used to support the bottom of the car door, specifically, to support the bottom of the outer panel 101 of the car door. The first contouring surface 211 of the first limiting block 210 and the second contouring surface 221 of the second limiting block 220 are used to limit and support one side of the car door. The third contouring surface of the third limiting block 230 and the fourth contouring surface of the fourth limiting block 240 are used to limit and support the other side of the car door. That is, the contouring limiting structure 200 can be used to limit both sides of the outer panel 101 to achieve stable placement, as shown in Figure 7. At the same time, the limiting component 800 can limit the car door. When the positioning detection component 700 detects that the car door has been placed, the car door clamping mechanism clamps the car door.

[0043] Example 2

[0044] This embodiment is a second embodiment of a door limiting device. This embodiment is similar to the first embodiment, except that, as shown in Figures 1 to 4, 8 and 9, the door clamping mechanism includes a first clamping component 300, a second clamping component 400, a third clamping component 500 and a fourth clamping component 600 connected to the frame 100. The first clamping component 300 is located above the second clamping component 400, and the third clamping component 500 is located above the fourth clamping component 600. A positioning detection element 700 is provided at any one or more of the first clamping component 300, the second clamping component 400, the third clamping component 500 and the fourth clamping component 600.

[0045] As shown in Figures 2 and 4, the first clamping assembly 300 includes a first clamping structure, a first mounting member 330, and a first driving member 340. The first clamping structure includes a first clamping part 310 and a second clamping part 320. The second clamping part 320 is connected to the frame 100 through the first mounting member 330. The first clamping part 310 is hinged to the first mounting member 330, and the first clamping part 310 is movably connected to the first mounting member 330 through the first driving member 340. The first driving member 340 can drive the first clamping part 310 and the second clamping part 320 to perform alignment and clamping. The first mounting member 330 is also connected to a first abutment part 350. In this embodiment, the first mounting component 330 includes a first mounting base 331 and a mounting plate 332 connected to the first mounting base 331. The first mounting base 331 is connected to the mounting frame 120. The first driving component 340 is a clamping cylinder. The cylinder seat of the clamping cylinder is hinged to the mounting plate 332. The clearance 121 can prevent the mounting frame 120 from interfering with the movement of the clamping cylinder. The first clamping part 310 includes a first clamping block 311 and a movable block 312 fixedly connected to the first clamping block 311. The movable block 312 is hinged to the mounting plate 332 and is also hinged to the telescopic rod of the clamping cylinder. The second clamping part 320 is a second clamping block that is correspondingly arranged to the first clamping block 311 and is connected to the mounting plate 332. When the clamp cylinder is in the extended state, the movable block 312 can drive the first clamping block 311 and the second clamping block to move closer to each other and clamp them; when the clamp cylinder is in the retracted state, the movable block 312 can drive the first clamping block 311 and the second clamping block to move further apart and open them.

[0046] As shown in Figure 4, the first abutment portion 350 is designed to abut against the inner panel 102 of the door, further improving the stability of the door on the door limiting device. The first abutment portion 350 includes an abutment block 351 and a fourth position adjustment bracket 352. The abutment block 351 is connected to the mounting plate 332 through the fourth position adjustment bracket 352. It should be noted that the fourth position adjustment bracket 352 has a structure similar to or the same as the first position adjustment bracket 250.

[0047] As shown in Figures 2 and 3, the second clamping assembly 400 includes a second clamping structure 410, a second mounting member 420, a second driving member 430, and a second abutting part 440. In this embodiment, the second clamping structure 410 is similar to or the same as the structure of the first clamping structure, the second mounting member 420 is similar to or the same as the structure of the first mounting member 330, the second driving member 430 is similar to or the same as the structure of the first driving member 340, and the second abutting part 440 is similar to or the same as the structure of the first abutting part 350. The second driving member 430 can drive the second clamping structure 410 to open or clamp.

[0048] As shown in Figures 2 and 3, the positioning detection component 700 is installed at the second clamping assembly 400. In this embodiment, the positioning detection component 700 includes a first limit switch 710 and a connecting piece 720. The first limit switch 710 is connected to the second mounting component 420 through the connecting piece 720. The connecting piece 720 can be set to a Z shape to facilitate the installation of the first limit switch 710.

[0049] As shown in Figures 1 and 2, the third clamping component 500 has a structure that is similar to or the same as that of the first clamping component 300, and the fourth clamping component 600 has a structure that is similar to or the same as that of the first clamping component 300. The third clamping structure 510 of the third clamping component 500 and the fourth clamping structure 610 of the fourth clamping component 600 are also used to clamp the car door, thereby improving the clamping stability of the car door.

[0050] In this embodiment, the first limiting block 210 is connected to the first mounting component 330 through the first position adjustment frame 250, and the third limiting block 230 is connected to the fixed end of the third clamping assembly 500 through the first position adjustment frame 250; specifically, the first limiting block 210 is connected to the mounting plate 332 through the first position adjustment frame 250, as shown in Figures 2 and 4.

[0051] As shown in Figures 1, 2, and 5, the base frame 110 is equipped with a pneumatic control valve 180, and the mounting frame 120 is equipped with an air source distributor 170. The clamping cylinders of the first clamping assembly 300, the second clamping assembly 400, the third clamping assembly 500, and the fourth clamping assembly 600 are all connected to the pneumatic control valve 180 through the air source distributor 170. The first limit switch 710 is electrically connected to the pneumatic control valve 180. In this embodiment, it can be configured such that the pneumatic control valve 180 controls each clamping cylinder to perform clamping or opening actions by whether the first limit switch 710 is triggered.

[0052] As shown in Figures 1, 2, and 4, the limiting assembly 800 includes a limiting pin 810 and a third position adjusting bracket 820. The limiting pin 810 is connected to the fixed end of the door clamping mechanism via the third position adjusting bracket 820. In this embodiment, two sets of limiting assemblies 800 are provided. One set of limiting pins 810 is connected to the first mounting member 330 via the third position adjusting bracket 820, and the other set of limiting pins 810 is connected to the fixed end of the third clamping assembly 500 via the third position adjusting bracket 820. Specifically, one set of limiting pins 810 is connected to the mounting plate 332 via the third position adjusting bracket 820. It should be noted that the structure of the third position adjusting bracket 820 is similar to or the same as that of the first position adjusting bracket 250.

[0053] The working principle of a door limiting device in this embodiment is as follows:

[0054] The car door is positioned at the frame 100 by the placement structure 150 and the contour limiting structure 200. At the same time, the limiting pin 810 can be inserted into the corresponding hole on the inner panel 102 of the car door for limiting. Then, when the first limit switch 710 detects that the car door has been placed, the pneumatic control valve 180 drives the cylinders of each clamp to move, so that the first clamping structure, the second clamping structure 410, the third clamping structure 510, and the fourth clamping structure 610 can all extend into the gap between the outer panel 101 and the inner panel 102 of the car door to achieve clamping, as shown in Figures 8 and 9.

[0055] Example 3

[0056] This embodiment is a third embodiment of a door limiting device. This embodiment is similar to Embodiment 1 or 2, except that, as shown in Figures 5, 6, and 9, the door limiting device further includes a rivet detection mechanism 900 connected to the frame 100. The rivet detection mechanism 900 includes a second mounting base 910, a trigger element 920 connected to the second mounting base 910, and an elastic contact assembly 930. One end of the elastic contact assembly 930 abuts against the trigger end of the trigger element 920, and the other end is used for contact detection with the rivet bolt 103. The second mounting base 910 is connected to the mounting bracket 120. The rivet detection mechanism 900 can be used to detect whether the current door has rivet bolts installed, avoiding defective products caused by missing rivet bolts.

[0057] In this embodiment, the riveting detection mechanism 900 is located between the first clamping assembly 300 and the third clamping assembly 500. The elastic contact assembly 930 includes a contact pin 931, a housing 932, and a spring locking sleeve 933. The housing 932 is connected to the second mounting base 910. The spring locking sleeve 933 is located inside the housing 932, and the fixing part of the spring locking sleeve 933 is connected to the housing 932. One end of the elastic part of the spring locking sleeve 933 extends out of the housing 932 and is connected to the contact pin 931. The other end of the elastic part of the spring locking sleeve 933 extends out of the housing 932 and abuts against the trigger member 920. When the contact pin 931 contacts the object, the trigger member 920 can be triggered by the spring locking sleeve 933. Specifically, the trigger 920 is a second limit switch electrically connected to the pneumatic control valve 180. In this embodiment, it can be configured to control the pneumatic control valve 180 to perform clamping or opening actions by whether the second limit switch is triggered, so that only the door with the rivet bolts 103 installed can be clamped by the door clamping mechanism, which can further avoid the occurrence of defective products.

[0058] The working principle of a door limiting device in this embodiment is as follows:

[0059] The door is positioned at the frame 100 by the placement structure 150 and the contour limiting structure 200, and is also limited by the limiting pin 810. Then, when the first limit switch 710 detects that the door has been placed, and when the second limit switch detects that the rivet bolt 103 has been installed at the inner panel 102, the door clamping mechanism is then controlled by the pneumatic valve 180 to clamp the door, as shown in Figures 8 and 9.

[0060] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0061] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A door limiting device, characterized in that, The device includes a frame (100), which is provided with a placement structure (150), a contour limiting structure (200), and a door clamping mechanism. The contour limiting structure (200) is located on the periphery of the door clamping mechanism. The frame (100) and / or the door clamping mechanism are provided with a positioning detection element (700). The frame (100) and / or the door clamping mechanism are also provided with a limiting component (800).

2. The door limiting device according to claim 1, characterized in that, The contouring limiting structure (200) includes a first contouring limiting block group and a second contouring limiting block group, and the door clamping mechanism is located between the first contouring limiting block group and the second contouring limiting block group; wherein, the first contouring limiting block group includes a first limiting block (210) and a second limiting block (220) located below the first limiting block (210), the side of the first limiting block (210) near the door clamping mechanism is the first contouring surface (211), and the side of the second limiting block (220) near the door clamping mechanism is the second contouring surface (221).

3. The door limiting device according to claim 2, characterized in that, The contour-following limiting structure (200) further includes a first position adjustment frame (250) and a second position adjustment frame (260). The first limiting block (210) is connected to the fixed end of the door clamping mechanism through the first position adjustment frame (250), and the second limiting block (220) is connected to the frame (100) through the second position adjustment frame (260).

4. The door limiting device according to claim 1, characterized in that, The placement structure (150) includes a plurality of placement blocks connected to the frame (100), the placement blocks being located below the contour limiting structure (200), and the side of the placement block closest to the door clamping mechanism being the fifth contour surface (151).

5. The door limiting device according to claim 1, characterized in that, The door clamping mechanism includes a first clamping assembly (300), a second clamping assembly (400), a third clamping assembly (500), and a fourth clamping assembly (600) connected to the frame (100). The first clamping assembly (300) is located above the second clamping assembly (400), and the third clamping assembly (500) is located above the fourth clamping assembly (600). The positioning detection element (700) is provided at any one or more of the first clamping assembly (300), the second clamping assembly (400), the third clamping assembly (500), and the fourth clamping assembly (600).

6. The door limiting device according to claim 5, characterized in that, The first clamping assembly (300) includes a first clamping structure, a first mounting member (330), and a first driving member (340). The first clamping structure includes a first clamping part (310) and a second clamping part (320). The second clamping part (320) is connected to the frame (100) through the first mounting member (330). The first clamping part (310) is hinged to the first mounting member (330), and the first clamping part (310) is movably connected to the first mounting member (330) through the first driving member (340). The first driving member (340) can drive the first clamping part (310) and the second clamping part (320) to perform alignment clamping. The first mounting member (330) is also connected to a first abutment part (350).

7. The door limiting device according to any one of claims 1 to 6, characterized in that, The limiting component (800) includes a limiting pin (810) and a third position adjustment bracket (820). The limiting pin (810) is connected to the fixed end of the door clamping mechanism through the third position adjustment bracket (820).

8. The door limiting device according to any one of claims 1 to 6, characterized in that, It also includes a riveting detection mechanism (900) connected to the frame (100), the riveting detection mechanism (900) including a second mounting base (910), a trigger (920) connected to the second mounting base (910), and an elastic contact assembly (930); one end of the elastic contact assembly (930) abuts against the trigger end of the trigger (920), and the other end is used to perform contact detection with the riveting bolt (103).

9. The door limiting device according to any one of claims 1 to 6, characterized in that, The frame (100) includes a base frame (110), a mounting bracket (120) connected to the base frame (110), and support legs (130). The placement structure (150) is connected to the base frame (110), and the door clamping mechanism is connected to the mounting bracket (120). The mounting bracket (120) is provided with clearance space (121) for the operation of the door clamping mechanism.

10. The door limiting device according to any one of claims 1 to 6, characterized in that, The frame (100) is provided with lifting lugs (161); and / or: the frame (100) is provided with forklift connectors (162).

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