Self-locking traction structure of vehicle

Abstract

A vehicle self-locking traction structure comprises a mounting base and a traction hook, the mounting base comprises a cavity, the cavity comprises a first opening located in the upper end of the mounting base and a second opening located in the lower end of the mounting base, the mounting base is provided with a first limiting piece and a second limiting piece, and the first limiting piece is located at the upper end of the first opening; the towing hook comprises a mounting arm, the mounting arm comprises a first clamping piece and a second clamping piece, the first clamping piece is arranged at the upper end of the mounting arm in a protruding mode and matched with the first limiting piece, and the second clamping piece is matched with the second limiting piece, so that the mounting arm is rotatably connected with the mounting base, and a first position and a second position are arranged in the cavity. When the mounting arm is located at the first position, the upper end of the first clamping piece makes contact with the first limiting piece, one end of the first clamping piece penetrates out of the first opening, and when the mounting arm is located at the second position, the lower end of the first clamping piece makes contact with the upper end of the mounting base.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle parts, in particular to a vehicle self-locking traction structure. Background Art

[0002] The towing hook is an important component of a vehicle, which can connect the towing vehicle and the vehicle to be towed, and is used to realize the emergency rescue of the vehicle. Therefore, it plays an important role in the safety of the vehicle. All vehicles need to be equipped with a towing hook when leaving the factory. The existing towing hooks are usually installed on the vehicle by screwing, but corresponding installation tools are required to complete the operation during disassembly and assembly, which has high requirements for installation, increases the difficulty of disassembly and assembly, and affects the use experience of vehicle users.

[0003] Therefore, there is an urgent need to propose a vehicle self-locking traction structure with a simple structure and low disassembly and assembly difficulty. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a vehicle self-locking traction structure, which has a simple structure, is convenient to install the towing hook on the vehicle or remove it from the vehicle, does not require additional installation tools, has a small disassembly and assembly operation difficulty, is not easy to fall off during the towing process, and is beneficial to improving the use experience.

[0005] The utility model provides a vehicle self-locking traction structure, including:

[0006] A mounting seat, including a cavity, the cavity includes a first opening at the upper end of the mounting seat and a second opening at the lower end of the mounting seat. The mounting seat is provided with a first limiting member and a second limiting member. The first limiting member is located at the upper end of the first opening, and the second limiting member is located at the lower end of the second opening.

[0007] And a towing hook, including a mounting arm, the mounting arm includes a first clamping member and a second clamping member. The first clamping member protrudes from the upper end of the mounting arm and cooperates with the first limiting member. The second clamping member cooperates with the second limiting member, so that the mounting arm is rotatably connected to the mounting seat and has a first position and a second position in the cavity.

[0008] When the mounting arm is in the first position, the upper end of the first clamping member contacts the first limiting member, and one end of the first clamping member passes through the first opening. When the mounting arm is in the second position, the lower end of the first clamping member contacts the upper end of the mounting seat.

[0009] In one embodiment, a limiting groove is formed in one of the second limiting member and the second clamping member, and the other is set as a shaft member, and the shaft member is rotatably received in the limiting groove.

[0010] In one embodiment, the upper end of the mounting base includes a first inclined surface, and the lower end of the first clamping member includes a second inclined surface. When the mounting arm is in the second position, the first inclined surface contacts the second inclined surface.

[0011] In one embodiment, the cavity wall of the cavity includes a first fitting surface perpendicular to the first inclined surface. There is a notch on the mounting arm, which is located at the lower end of the first clamping member and forms a second fitting surface on the mounting arm. The second fitting surface is perpendicular to the second inclined surface. When the mounting arm is in the second position, the first fitting surface contacts the second fitting surface.

[0012] In one embodiment, a third limiting member protrudes from the cavity wall of the cavity, and the third limiting member is used to contact the mounting arm.

[0013] In one embodiment, a locking assembly is further included. The locking assembly includes a control member and a fixing member. The mounting arm includes a control groove and a fixing groove, and the control groove communicates with the fixing groove. The control member is partially installed in the control groove and is connected to the fixing member. The fixing member is movably installed in the fixing groove. The control member can rotate around its own axis in the control groove, so that one end of the fixing member can penetrate out of the fixing groove and be clamped with the mounting base.

[0014] In one embodiment, a clamping groove is formed on the first limiting member, and the position of the clamping groove is matched with that of the fixing groove. When the mounting arm is in the second position in the cavity, the upper end of the fixing member penetrates out of the fixing groove and is received in the clamping groove.

[0015] In one embodiment, the control member is connected to the fixing member through a transmission member. The transmission member includes a gear and a rack that are in tooth engagement. The gear is installed in the control groove and is connected to the control member, and the rack is installed in the fixing groove and is connected to the fixing member.

[0016] In one embodiment, the control member is connected to the fixing member through a transmission member. The transmission member includes a connecting rod. The connecting rod is movably installed in the control groove. One end of the connecting rod is connected to the control member, and the other end is rotatably connected to the fixing member.

[0017] In one embodiment, the control member is connected to a lock core. The lock core includes a lock hole, and the lock core is used to lock or unlock the control member.

[0018] The beneficial effects of the present utility model are as follows:

[0019] Through the setting of the cavity, the quick positioning connection between the mounting seat and the towing hook can be realized. The cooperation between the first limiting member and the first clamping member can play a role in mounting and limiting. The upper end of the first clamping member contacts the first limiting member, reminding the user that the towing hook has been installed in place at this angle. The second limiting member cooperates with the second clamping member. The user only needs to rotate the towing hook after the towing hook is installed in the first position, so that the lower end of the first clamping member contacts the upper end of the mounting seat to complete the installation. The operation is simple and convenient, without the need to rely on additional installation tools. Moreover, during the towing process, the towing force will exert a downward force on the mounting arm, making the lower end of the first clamping member fit tightly with the upper end of the mounting seat and preventing it from disengaging from the cavity, which is beneficial to improving the towing efficiency. Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0022] Figure 2 It is an exploded view of the mounting seat, towing hook and locking assembly of an embodiment of the present invention;

[0023] Figure 3 It is a cross-sectional view of the mounting seat of an embodiment of the present invention;

[0024] Figure 4 It is a cross-sectional view of the towing hook in the first position of an embodiment of the present invention;

[0025] Figure 5 It is a cross-sectional view of the towing hook in the second position of an embodiment of the present invention;

[0026] Figure 6 It is a cross-sectional view of the towing hook in the second position of another embodiment of the present invention.

[0027] In the figure:

[0028] 100 - Mounting seat; 101 - First inclined surface; 110 - Cavity; 111 - First fitting surface; 120 - First limiting member; 121 - Clamping groove; 130 - Second limiting member; 131 - Limiting groove; 140 - Third limiting member;

[0029] 200 - Traction hook; 210 - Mounting arm; 211 - Second fitting surface; 212 - Control groove; 213 - Fixing groove; 220 - First clamping member; 221 - Second inclined surface; 230 - Second clamping member;

[0030] 300 - Locking assembly; 310 - Control member; 311 - Lock core; 320 - Fixing member; 330 - Transmission member; 331 - Gear; 332 - Rack; 333 - Connecting rod;

[0031] 400 - Main beam; 410 - First mounting member; 420 - Second mounting member; 500 - Anti - collision beam. Detailed implementation manners

[0032] The following will describe in detail specific embodiments of the present utility model in conjunction with the drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the description of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0033] Unless otherwise clearly defined and limited, terms such as "set", "installed", "connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of description and simplification of the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0035] Terms such as "first", "second", "third", etc. are only used to distinguish elements with similar attributes, rather than indicating or implying relative importance or a specific order.

[0036] The term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion. In addition to the listed elements, it may also include other elements not specifically listed.

[0037] As shown in the attached Figure 1As shown in the coordinate system, the X, Y, and Z directions in the coordinate system are based on the vehicle coordinate system. The vehicle coordinate system is a special moving coordinate system used to describe the movement of the vehicle. The origin of this coordinate system coincides with the center of mass of the vehicle. When the vehicle is stationary on a horizontal road surface, the X direction of this coordinate system refers to the direction parallel to the driving direction of the vehicle, the Y direction refers to the width direction of the vehicle, and the Z direction refers to the height direction of the vehicle.

[0038] It can be understood that the positions, directions, etc. of the various components mentioned in the present invention do not need to be strictly set according to the X, Y, and Z directions. Those skilled in the art can flexibly adjust according to actual needs.

[0039] Combined with the attached Figure 1 and the attached Figure 2 , the vehicle self-locking traction structure proposed by the present invention includes:

[0040] The mounting seat 100 is mounted on the vehicle. Combined with the attached Figure 2 and the attached Figure 3 , the mounting seat 100 includes a cavity 110. The cavity 110 includes a first opening at the upper end of the mounting seat 100 and a second opening at the lower end of the mounting seat 100. The first opening is in communication with the second opening. The mounting seat 100 is provided with a first limiting member 120 and a second limiting member 130. The first limiting member 120 is located at the upper end of the first opening. The first limiting member 120 partially covers the upper end of the first opening and is used to contact the upper end of the towing hook 200 to play a role in mounting and limiting. The second limiting member 130 is located at the lower end of the second opening;

[0041] And the towing hook 200. As shown in the attached Figure 2 , the towing hook 200 includes a mounting arm 210. The mounting arm 210 is installed in the cavity 110 from bottom to top. The mounting arm 210 includes a first clamping member 220 and a second clamping member 230. The first clamping member 220 protrudes from the upper end of the mounting arm 210 and cooperates with the first limiting member 120. The second clamping member 230 cooperates with the second limiting member 130, so that the mounting arm 210 is rotatably connected to the mounting seat 100. By rotating the mounting arm 210, the mounting arm 210 has a first position and a second position in the cavity 110;

[0042] As shown in the attached Figure 4 , when the mounting arm 210 is in the first position in the cavity 110, the upper end of the first clamping member 220 contacts the first limiting member 120, and one end of the first clamping member 220 passes through the first opening. At this time, the mounting arm 210 extends in the up and down direction and can still be disengaged from the cavity 110;

[0043] As shown in the attached Figure 5As shown, when the mounting arm 210 is in the second position within the cavity 110, the mounting arm 210 is inclined and installed within the cavity 110. The lower end of the first clamping member 220 contacts the upper end of the mounting base 100. The mounting base 100 provides support and limitation to the first clamping member 220. Under the action of the self-gravity of the mounting arm 210, the first clamping member 220 presses on the upper end of the mounting base 100, and the mounting arm 210 cannot be disengaged from the cavity 110 at this angle.

[0044] Through the setting of the cavity 110, rapid positioning connection between the mounting base 100 and the towing hook 200 can be achieved. The cooperation between the first limiting member 120 and the first clamping member 220 can play a role in mounting limitation. The upper end of the first clamping member 220 contacts the first limiting member 120, reminding the user that the towing hook 200 has been installed in place at this angle. The second limiting member 130 cooperates with the second clamping member 230. The user only needs to rotate the towing hook 200 after the towing hook 200 is installed in the first position to make the lower end of the first clamping member 220 contact the upper end of the mounting base 100 to complete the installation. The operation is simple and convenient, without the need to rely on additional installation tools. And during the towing process, the towing force will exert a downward force on the mounting arm 210, making the lower end of the first clamping member 220 fit tightly with the upper end of the mounting base 100 and not disengaging from the cavity 110, which is beneficial to improving the towing efficiency.

[0045] Optionally, the towing hook 200 includes a ball head arm connected to the mounting arm 210, and the ball head arm is used to connect the towing rope to achieve the towing function.

[0046] Optionally, the first limiting member 120, the second limiting member 130 and the mounting base 100 are integrally formed.

[0047] Optionally, the first clamping member 220, the second clamping member 230 and the mounting arm 210 are integrally formed.

[0048] In one example, referring to the coordinate system in the appendix Figure 1 and combining with appendix Figure 2 and appendix Figure 3 , the first limiting member 120 is connected to the upper end of the mounting base 100, extends backward along the X direction, and covers the upper end of the first opening, so that the X-direction dimension of the first opening is reduced. With the mounting arm 210 in the first position as a reference, the first clamping member 220 is connected to the upper end of the mounting arm 210 and protrudes and extends backward along the X direction.

[0049] As shown in appendix Figure 5 , when the mounting arm 210 is in the second position, the mounting arm 210 is installed in the cavity 110 in a backward and downward inclined manner. To make the lower end of the first clamping member 220 fit tightly with the upper end of the mounting base 100, combining with appendix Figure 4, the upper end of the mounting base 100 includes a first inclined surface 101, and the lower end of the first clamping member 220 includes a second inclined surface 221. The first inclined surface 101 and the second inclined surface 221 are parallel, and the first inclined surface 101 contacts the second inclined surface 221 to support the first clamping member 220 through the mounting base 100.

[0050] It can be understood that the setting position and extension direction of the first limiting member 120, and the setting position and extension direction of the first clamping member 220 can be flexibly set according to actual needs. The above examples are intended to illustrate a possible embodiment.

[0051] In one example, in combination with the attached Figure 2 and the attached Figure 3 , a limiting groove 131 is formed on one of the second limiting member 130 and the second clamping member 230, and the other is set as a shaft member, and the shaft member is rotatably received in the limiting groove 131.

[0052] Optionally, referring to the coordinate system in the attached Figure 1 , and in combination with the attached Figure 2 , the second limiting member 130 is disposed on at least one side of the mounting base 100 in the Y direction, and a limiting groove 131 is formed at the lower end of the second limiting member 130. The limiting groove 131 penetrates the second limiting member 130 along the Y direction and communicates with the cavity 110. The second clamping member 230 is set as a shaft member and protrudes from at least one side of the mounting arm 210 in the Y direction. When the mounting arm 210 is installed in the cavity 110 from bottom to top, the shaft member is received in the limiting groove 131 from bottom to top.

[0053] Optionally, two second limiting members 130 are provided and located at both ends of the mounting base 100 in the Y direction, and two second clamping members 230 are provided and protrude from both ends of the mounting arm 210 in the Y direction.

[0054] Optionally, the limiting groove 131 is set as an arc groove, and the shaft member is set as a cylindrical shaft.

[0055] In one example, as shown in the attached Figure 3 , the cavity wall of the cavity 110 includes a first fitting surface 111, and the first fitting surface 111 is perpendicular to the first inclined surface 101. In combination with the attached Figure 2 , a notch is provided on the mounting arm 210. The notch is located at the lower end of the first clamping member 220 and forms a second fitting surface 211 on the mounting arm 210. The second fitting surface 211 is perpendicular to the second inclined surface 221. When the mounting arm 210 is in the second position, referring to the attached Figure 5 , the first fitting surface 111 contacts the second fitting surface 211 to ensure the stable cooperation between the first clamping member 220 and the mounting base 100.

[0056] Optionally, the first fitting surface 111 is disposed on a rear wall of the cavity 110 , and the notch is disposed at a rear end of the mounting arm 210 .

[0057] In one example, as shown in the attached Figure 3 As shown, a third stopper 140 is convexly disposed on the cavity wall of the cavity body 110, and the third stopper 140 is used to contact with the mounting arm 210 and to be combined with the attachment Figure 5 When the mounting arm 210 is located at the second position in the cavity 110 , the third stopper 140 contacts the mounting arm 210 , and can support the mounting arm 210 to ensure that the mounting arm 210 is firmly installed in the cavity 110 .

[0058] Optionally, the third stopper 140 is protruded on the rear end wall of the cavity 110 , protrudes forward in the cavity 110 , and contacts the rear end of the mounting arm 210 .

[0059] Optionally, the third limiting member 140 and the mounting base 100 are integrally formed.

[0060] Optionally, the third limiting member 140 includes an arc segment, which protrudes toward a side close to the mounting arm 210, and the arc segment is used to contact the mounting arm 210 to cooperate with the second limiting member 130 and the second clamping member 230 to ensure stable and smooth rotation of the mounting arm 210.

[0061] In one example, as shown in the attached Figure 1 As shown, the vehicle self-locking traction structure proposed by the utility model further includes a locking assembly 300, through which the traction hook 200 is detachably connected to the mounting seat 100, and the locking assembly 300 is used to lock the traction hook 200 to the mounting seat 100, or unlock it from the mounting seat 100. Figure 2 and attached Figure 4 The locking assembly 300 includes a control member 310 and a fixing member 320. A control groove 212 and a fixing groove 213 are provided on the mounting arm 210. The control groove 212 is communicated with the fixing groove 213. The control member 310 is partially installed in the control groove 212 and can rotate around its own axis in the control groove 212. The fixing member 320 is movably installed in the fixing groove 213. The control member 310 is transmission-connected with the fixing member 320. By rotating the control member 310, the fixing member 320 can move in the fixing groove 213. One end of the fixing member 320 can pass through the fixing groove 213 and be engaged with the mounting seat 100.

[0062] Refer to the attached Figure 1 The coordinate system in Figure 2 and attached Figure 4, the control groove 212 is formed at one end of the mounting arm 210 along the Y direction. Taking the mounting arm 210 in the first position as a reference, the fixing groove 213 is formed on the mounting arm 210 along the Z direction and at least penetrates through the upper end of the mounting arm 210. The fixing member 320 can move in the fixing groove 213 in the up and down direction, and its upper end can pass through the fixing groove 213 and be clamped with the mounting seat 100.

[0063] As shown in the attached Figure 3 , a clamping groove 121 is formed at the upper end of the mounting seat 100. More specifically, a clamping groove 121 is formed at the rear end of the first limiting member 120. The clamping groove 121 penetrates through the lower end of the first limiting member 120 and corresponds to the position of the fixing groove 213. When the mounting arm 210 is in the second position in the cavity 110, by operating the control member 310, the upper end of the fixing member 320 passes through the fixing groove 213 and is received in the clamping groove 121 to lock the mounting arm 210 in the fixing groove 213.

[0064] In one embodiment, as shown in the attached Figure 2 , the control member 310 is connected to the fixing member 320 through a transmission member 330. As shown in the attached Figure 4 , the transmission member 330 includes a gear 331 and a rack 332. The gear 331 and the rack 332 are in meshing transmission. The gear 331 is installed in the control groove 212 and is connected to the control member 310. The rack 332 is received in the fixing groove 213 and is connected to the fixing member 320. By rotating the control member 310, the gear 331 can rotate about its own axis. Through tooth meshing, the rack 332 moves in the fixing groove 213, and further drives the fixing member 320 to move in the fixing groove 213.

[0065] Optionally, referring to the coordinate system in the attached Figure 1 and combining with the attached Figure 4 , the control groove 212 and the fixing groove 213 are distributed and communicated along the X direction. The axis of the gear 331 extends along the Y direction, and the rack 332 extends along the Z direction and is connected to the lower end of the fixing member 320.

[0066] Optionally, the rack 332 and the fixing member 320 are integrally formed.

[0067] In another embodiment, combining the attached Figure 2 and the attached Figure 6 , the transmission member 330 includes a connecting rod 333. The connecting rod 333 is movably installed in the control groove 212. One end of the connecting rod 333 is connected to the control member 310, and the other end is rotatably connected to the fixing member 320. By rotating the control member 310, the connecting rod 333 rotates about the axis of the control member 310 in the control groove 212, and then the connection angle between the connecting rod 333 and the fixing member 320 changes. The connecting rod 333 drives the fixing member 320 to move in the fixing groove 213.

[0068] Optionally, referring to the coordinate system in the attached Figure 1 and combining with the attached Figure 6 , the control groove 212 and the fixing groove 213 are distributed along the Z direction, and the control groove 212 is opened at the lower end of the fixing groove 213.

[0069] Optionally, the connecting rod 333 and the fixing member 320 adopt a crank - connecting rod structure.

[0070] In one example, as shown in the attached Figure 6 , the control member 310 is connected to the lock core 311. The lock core 311 includes a keyhole that cooperates with a key. The lock core 311 is used to lock or unlock the control member 310, and thus lock or unlock the mounting arm 210. Only by unlocking the lock core 311 with the key can the control member 310 be rotated, and then the position of the fixing member 320 in the fixing groove 213 can be controlled. The setting of the lock core 311 can play an anti - theft role, prevent the tow hook 200 from being lost, and is beneficial to improving the safety of the vehicle.

[0071] In one example, as shown in the attached Figure 1 , the vehicle self - locking tow structure proposed by the present utility model includes a main beam 400. The mounting seat 100 is mounted on the main beam 400 and is mounted on the vehicle through the main beam 400. The main beam 400 is detachably connected to the vehicle.

[0072] Optionally, the main beam 400 and the vehicle are detachably connected by screwing.

[0073] Exemplarily, the main beam 400 extends substantially along the Y direction. A first mounting member 410 and a second mounting member 420 are connected to the main beam 400 along the X direction. The first mounting member 410 and the second mounting member 420 are spaced apart in the Y direction. The mounting seat 100 is mounted between the first mounting member 410 and the second mounting member 420 and is detachably connected to the first mounting member 410 and the second mounting member 420. The cooperation of the first mounting member 410 and the second mounting member 420 can increase the stability of the mounting of the mounting seat 100 and improve the reliability.

[0074] Optionally, the mounting seat 100 is connected to the first mounting member 410 and the second mounting member 420 by screwing.

[0075] Optionally, the first mounting member 410 and the second mounting member 420 are connected to the main beam 400 by welding.

[0076] As shown in the attached Figure 1 , the anti - collision beam 500 is detachably mounted on the main beam 400 by screwing. The specifications of the main beam 400 and the anti - collision beam 500 can be flexibly selected and installed according to the requirements of different vehicle models, having good versatility and flexibility, and being able to meet the styling design requirements and rear - impact regulation requirements of different vehicles.

[0077] The above are only specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A vehicle self-locking traction structure, characterized in that, Comprising: A mounting base (100), including a cavity (110), the cavity (110) including a first opening at the upper end of the mounting base (100) and a second opening at the lower end of the mounting base (100), the mounting base (100) being provided with a first limiting member (120) and a second limiting member (130), the first limiting member (120) being located at the upper end of the first opening, and the second limiting member (130) being located at the lower end of the second opening. And a towing hook (200), including a mounting arm (210), the mounting arm (210) including a first clamping member (220) and a second clamping member (230), the first clamping member (220) protruding from the upper end of the mounting arm (210) and cooperating with the first limiting member (120), and the second clamping member (230) cooperating with the second limiting member (130), so that the mounting arm (210) is rotatably connected to the mounting base (100) and has a first position and a second position within the cavity (110). When the mounting arm (210) is in the first position, the upper end of the first clamping member (220) contacts the first limiting member (120), and one end of the first clamping member (220) passes through the first opening. When the mounting arm (210) is in the second position, the lower end of the first clamping member (220) contacts the upper end of the mounting base (100).

2. The vehicle self-locking traction structure according to claim 1, characterized in that A limiting groove (131) is formed in one of the second limiting member (130) and the second clamping member (230), and the other is provided as a shaft member, and the shaft member is rotatably received in the limiting groove (131).

3. The vehicle self-locking traction structure according to claim 1, characterized in that, The upper end of the mounting base (100) includes a first inclined surface (101), and the lower end of the first clamping member (220) includes a second inclined surface (221). When the mounting arm (210) is in the second position, the first inclined surface (101) contacts the second inclined surface (221).

4. The vehicle self-locking traction structure according to claim 3, characterized in that, The cavity wall of the cavity (110) includes a first fitting surface (111), the first fitting surface (111) being perpendicular to the first inclined surface (101). The mounting arm (210) is provided with a notch, the notch being located at the lower end of the first clamping member (220) and forming a second fitting surface (211) on the mounting arm (210), the second fitting surface (211) being perpendicular to the second inclined surface (221). When the mounting arm (210) is in the second position, the first fitting surface (111) contacts the second fitting surface (211).

5. The vehicle self-locking traction structure according to claim 1, wherein, A third limiting member (140) protrudes from the cavity wall of the cavity (110), and the third limiting member (140) is used to contact the mounting arm (210).

6. The vehicle self-locking traction structure according to claim 1, characterized in that, It further includes a locking assembly (300). The locking assembly (300) includes a control member (310) and a fixing member (320). The mounting arm (210) includes a control groove (212) and a fixing groove (213). The control groove (212) communicates with the fixing groove (213). The control member (310) is partially disposed in the control groove (212) and is connected to the fixing member (320). The fixing member (320) is movably disposed in the fixing groove (213). The control member (310) can rotate around its own axis in the control groove (212), so that one end of the fixing member (320) can penetrate out of the fixing groove (213) and be clamped with the mounting base (100).

7. The vehicle self-locking traction structure according to claim 6, characterized in that, A clamping groove (121) is formed in the first limiting member (120). The position of the clamping groove (121) is matched with that of the fixing groove (213). When the mounting arm (210) is in the second position in the cavity (110), the upper end of the fixing member (320) penetrates out of the fixing groove (213) and is received in the clamping groove (121).

8. The vehicle self-locking traction structure according to claim 6, characterized in that, The control member (310) is connected to the fixing member (320) through a transmission member (330). The transmission member (330) includes a gear (331) and a rack (332) that are in tooth engagement. The gear (331) is installed in the control groove (212) and is connected to the control member (310). The rack (332) is installed in the fixing groove (213) and is connected to the fixing member (320).

9. The vehicle self-locking traction structure according to claim 6, characterized in that, The control member (310) is connected to the fixing member (320) through a transmission member (330). The transmission member (330) includes a connecting rod (333). The connecting rod (333) is movably installed in the control groove (212). One end of the connecting rod (333) is connected to the control member (310), and the other end is rotatably connected to the fixing member (320).

10. The vehicle self-locking traction structure according to claim 8 or 9, characterized in that, The control member (310) is connected to a lock core (311). The lock core (311) includes a lock hole. The lock core (311) is used to lock or unlock the control member (310).

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