Towing connection device

Abstract

The application provides a trailer connecting device, which comprises a trailer support, a hitch mounting block connected to the trailer support, the hitch mounting block being provided with a mounting portion, a hitch member comprising a fitting body matched with the mounting portion and a hitch structure connected to the fitting body, and an elastic limiting mechanism arranged between the hitch mounting block and the hitch member, the elastic limiting mechanism being used for limiting the relative movement of the hitch mounting block and the hitch member at the mounting portion, so that the structure is simple, the assembly operation is convenient, and the connecting structure is stable.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, and more specifically, to a trailer hitch-on device for vehicle towing. Background Technology

[0002] With the advancement of science and technology and the significant development of engineering technology, vehicles have become an indispensable piece of equipment in people's social life and production.

[0003] Vehicles possess an important extended function—towing. The trailer hitch is a crucial component for enabling vehicle towing. Common trailer hitchs include ball-joint types. These are mostly designed as assembly structures, with the ball joint connector mounted onto the hitch mounting bracket. Conventional installation structures are relatively complex, requiring cumbersome assembly steps and causing inconvenience. Therefore, improved technical solutions are necessary. Summary of the Invention

[0004] In view of the above, the present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a towing connection device, which is assembled by sequentially arranging a towing bracket, a mounting block, and a mounting member. The mounting block is provided with a mounting hole to accommodate the mating body of the mounting member. An elastic limiting mechanism is correspondingly arranged between the mounting block and the mating body to achieve relative limiting between the two, thereby realizing the limited installation of the mounting block and the mounting member. The structure is simple and the connection is stable.

[0005] Therefore, in a first aspect, embodiments of the present invention provide a towing connection device, comprising: Trailer bracket; A mounting block is attached to the towing bracket, and the mounting block is provided with a mounting part; The mounting bracket includes a mating body adapted to the mounting portion and a mounting structure connected to the mating body; and, An elastic limiting mechanism is disposed between the mounting block and the mounting member, and the elastic limiting mechanism is used to limit the relative movement of the mounting block and the mounting member in the mounting part.

[0006] Preferably, the mounting part is configured as a mounting hole, and the inner wall of the mounting hole is provided with a first limiting blind groove; the mating body is provided with a second limiting blind groove corresponding to the first limiting blind groove, and the mating body is configured to be installed into the mounting hole from the outside; the elastic limiting mechanism is configured to be received in the first limiting blind groove and the second limiting blind groove, and to limit the relative movement of the hanging mounting block and the hanging member in the axial direction of the mounting hole.

[0007] Preferably, the mounting hole includes a cylindrical hole portion, the first limiting blind groove is disposed on the inner wall of the cylindrical hole portion, the mating body includes a corresponding cylindrical portion, and the second limiting blind groove is disposed on the cylindrical portion.

[0008] Preferably, the second limiting blind groove is configured as a hole groove structure extending radially along the mating body, and the elastic extension direction of the elastic limiting mechanism corresponds to the radial direction of the mating body.

[0009] Preferably, the second limiting blind groove is configured as a stepped hole groove structure, including a first hole groove portion located inside the mating body and a second hole groove portion located on the surface of the mating body. In the direction perpendicular to the corresponding radial direction of the mating body, the size of the second hole groove portion is larger than the size of the first hole groove portion. The elastic limiting mechanism includes a spring and a limiting block sleeved on the spring. The spring is received in the first hole groove portion. In the direction perpendicular to the corresponding radial direction of the mating body, the size of the limiting block is adapted to the size of the second hole groove portion.

[0010] Preferably, the first limiting blind groove is configured as a hole-groove structure extending radially along the mounting hole; or, the first limiting blind groove is configured as an annular groove structure extending circumferentially along the mounting hole.

[0011] Preferably, the mounting hole further includes a stepped hole portion that connects the cylindrical hole portion and the external space, and the mating body further includes a stepped portion that is connected to the main body portion and corresponds to the stepped hole portion. The stepped portion is received in the stepped hole portion to restrict the relative movement of the hanging mounting block and the hanging member in the axial direction of the mounting hole.

[0012] Preferably, the cross-sectional shape of the stepped hole portion is set to be non-circular, and the stepped portion is correspondingly received in the stepped hole portion to restrict the relative rotation of the hook mounting block and the hook member corresponding to the axial direction of the mounting hole.

[0013] Preferably, the elastic limiting mechanism includes a spring and a limiting block sleeved on the spring, wherein the two ends of the spring opposite to the limiting block respectively abut against the bottom of the first limiting blind groove and the bottom of the second limiting blind groove, or respectively abut against the bottom of the second limiting blind groove and the bottom of the first limiting blind groove.

[0014] Preferably, the limiting block includes a connecting part that sleeves the spring and a limiting part that connects the connecting part, wherein the connecting part is provided with a receiving groove or receiving hole for receiving part of the spring.

[0015] Preferably, the cylindrical hole portion and the cylindrical body portion are configured as corresponding cylindrical structures; the first limiting blind groove and the second limiting blind groove are configured such that: one of them allows the elastic limiting mechanism to extend elastically along the radial direction of the mating body, and the other allows the elastic limiting mechanism to slide circumferentially along the mating body and extend elastically along the radial direction of the mating body.

[0016] Preferably, the first limiting blind groove is configured as a groove structure that extends from the inner wall surface of the mounting hole inward along the circumference of the mating body, and the second limiting blind groove is configured as a hole groove structure that extends radially along the mating body.

[0017] Preferably, the first limiting blind groove extends from both ends in the circumferential direction relative to the mating body towards the middle.

[0018] Preferably, the end face of the elastic limiting mechanism corresponding to the first limiting blind groove is configured as a convex structure that transitions in the circumferential direction of the mating body, and the middle part of the end face protrudes from the other parts.

[0019] Preferably, the mounting hole is configured as a through hole structure, and the hook structure of the hook member is configured as two, respectively disposed at opposite ends of the mating body, and the projection size of at least one hook structure in the radial direction of the hook member is not greater than the projection size of the mating body in the radial direction of the hook member.

[0020] Preferably, the trailer bracket includes a generally horizontal tie rod portion and a generally vertical trailer portion connected to the tie rod portion, and the mounting block is configured to connect to different height positions of the trailer portion; wherein, The towing bracket has a plurality of vertically distributed first connecting holes, and the mounting block has a second connecting hole, through which a pin can be optionally locked to different first connecting holes; and / or, The towing bracket and the mounting block are provided with a vertical sliding structure for cooperation.

[0021] The towing connection device provided by this invention is assembled by sequentially arranging a towing bracket, a mounting block, and a connector. The towing bracket is connected to a tractor, and the connector is used to connect to the trailer, thereby achieving towing and coupling. The mounting block has mounting holes to accommodate the mating body of the connector, and an elastic limiting mechanism is correspondingly positioned between the mounting block and the mating body to achieve limited installation of the mounting block and the connector. The structure is simple and the connection is stable. The elastic limiting mechanism is positioned between the mounting block and the mating body in a compressed state. As the mating body and the mounting block move relative to each other, the elastic limiting mechanism extends elastically at a suitable position, simultaneously limiting the relative movement of the mounting block and the mating body, thus restricting the connector and the mounting block's relative movement. This design is convenient to operate and provides a good user experience. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the towing connection device provided in an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the disassembled structure of the trailer connection device; Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the trailer connection device along the longitudinal section AA. Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure of the trailer connection device along the BB section of the line; Figure 5 for Figure 1 A schematic diagram of the cross-sectional structure of the trailer connection device along the CC section. Figure 6 A cross-sectional view of the towing connection device along line BB in another embodiment; Figure 7 This is a schematic cross-sectional view of the towing connection device along the CC section of another embodiment. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0025] Please refer to Figures 1 to 5 This invention provides a trailer-mounted connection device for vehicle towing. Specifically, it is attached to the rear of a tractor unit to tow a trailer, such as a mid-to-large SUV, towing a caravan trailer, thus enabling long-distance travel scenarios. This trailer-mounted connection device has a simple structure, is easy to assemble, and provides a stable connection.

[0026] The towing connection device specifically includes: 10-ton trailer hitch; The mounting block 20 is connected to the towing bracket 10, and the mounting block 20 is provided with a mounting part; The mounting bracket 30 includes a mating body 31 adapted to the mounting portion and a mounting structure 32 connected to the mating body 31; and, An elastic limiting mechanism 40 is disposed between the mounting block 20 and the mounting member 30. The elastic limiting mechanism 40 is used to limit the relative movement of the mounting block 20 and the mounting member 30 in the mounting part.

[0027] The hanging structure 32 is actually set as a hanging ball head, but it can also be set as other structures.

[0028] Furthermore, the towing bracket 10 has its front end used to connect to a towing vehicle; The mounting block 20 is connected to the rear end of the towing bracket 10. The mounting part is configured as a mounting hole 21, located at the end of the mounting block 20 away from the towing bracket 10. The inner wall of the mounting hole 21 is provided with a first limiting blind groove 22. The mating body 31 is provided with a second limiting blind groove 33 corresponding to the first limiting blind groove 22, and the mating body 31 is configured to be externally installed into the mounting hole 21; and The elastic limiting mechanism 40 is specifically configured to be housed in the first limiting blind groove 22 and the second limiting blind groove 33, and to restrict the relative movement of the hook mounting block 20 and the hook member 30 in the axial direction of the mounting hole 21.

[0029] In this embodiment, the mating body 31 of the hook-up member 30 is installed in the mounting hole 21 of the hook-up mounting block 20, and correspondingly provided with a first limiting blind groove 22 and a second limiting blind groove 33, and internal limiting is achieved by an elastic limiting mechanism 40. The first limiting blind groove 22 and the second limiting blind groove 33 are accommodating structures that open to one side. When the hook-up mounting block 20 and the hook-up member 30 are combined and installed, the space of the first limiting blind groove 22 and the second limiting blind groove 33 is relatively closed, so that the connection between the two forms an integral structure. The elastic limiting mechanism 40 achieves internal limiting connection, resulting in a stable structure. In addition, during the assembly process, the elastic limiting mechanism 40 is compressed and housed in one of the first limiting blind groove 22 and the second limiting blind groove 33. When the hanger 30 is installed in place relative to the hanging mounting block 20, the positions of the first limiting blind groove 22 and the second limiting blind groove 33 are relative, and the elastic limiting mechanism 40 is elastically released and extended while being housed in the first limiting blind groove 22 and the second limiting blind groove 33, thereby achieving the limiting of the hanger 30 relative to the hanging mounting block 20. The assembly is simple and the operation is convenient.

[0030] The number of elastic limiting mechanisms 40 can be set to one, two, three, four, etc. In the embodiment shown in the figure, the number is set to two, and the two elastic limiting mechanisms 40 are positioned opposite each other, which makes the structure relatively simple and the connection stable.

[0031] In other embodiments, the mounting part may also be configured as a groove, cavity, bushing or other structure to achieve a fitting connection with the mating body 31.

[0032] Furthermore, the mounting hole 21 includes a cylindrical hole portion 211, the first limiting blind groove 22 is disposed on the inner wall of the cylindrical hole portion 211, the mating body 31 includes a corresponding cylindrical portion 311, and the second limiting blind groove 33 is disposed on the cylindrical portion 311.

[0033] Wherein, the first limiting blind groove 22 is disposed outside the space of the cylindrical hole portion 211, the cylindrical hole portion 211 means that the space of the portion excluding the space of the first limiting blind groove 22 connected thereto is a cylindrical structure; the second limiting blind groove 22 is disposed inside the solid of the cylindrical portion 311, the cylindrical portion 311 means that the overall structure of the portion including the second limiting blind groove 33 is a cylindrical structure.

[0034] In this embodiment, the mounting hole 21 and the mating body 31 are respectively configured as corresponding cylindrical structures, such as cylindrical, triangular prism, quadrangular prism, pentagonal prism, etc. The installation direction of the mating body 31 relative to the mounting hole 21 is set along the axial direction of the mounting hole 21 and the mating body 31, resulting in a uniform structural distribution and stable connection. The embodiment shown in the figure uses a cylindrical structure, but it is not limited to this. It is understood that the shapes of the mounting hole 21 and the mating body 31 are not limited to cylindrical structures; for example, they can be conical or stepped, as long as they allow the mating body 31 to be tightly connected to the mounting hole 21.

[0035] Furthermore, the second limiting blind groove 33 is configured as a hole groove structure extending radially along the mating body 31, and the elastic extension direction of the elastic limiting mechanism 40 corresponds to the radial direction of the mating body 31.

[0036] In this embodiment, setting the radial direction as the extension direction of the elastic element is a preferred approach, resulting in a balanced force and structural stability in the limiting connection. However, it is understood that the extension direction of the elastic limiting mechanism 40 does not necessarily have to be set in the radial direction; a certain misalignment with the radial direction can also achieve the effect of limiting the connection.

[0037] Furthermore, the second limiting blind groove 33 is configured as a stepped hole groove structure, including a first hole groove portion 331 located inside the mating body 31 and a second hole groove portion 332 located on the surface of the mating body 31. In the direction perpendicular to the radial direction of the mating body 31, the size of the second hole groove portion 332 is larger than the size of the first hole groove portion 331. The elastic limiting mechanism 40 includes a spring 41 and a limiting block 42 sleeved on the spring 41. The spring 41 is received in the first hole groove portion 331. In the direction perpendicular to the radial direction of the mating body 31, the size of the limiting block 42 is adapted to the size of the second hole groove portion 332.

[0038] In this embodiment, the second limiting blind groove 33 is configured as a stepped hole groove structure. Correspondingly, the elastic limiting mechanism 40 is configured to consist of a spring 41 and a limiting block 42. The spring 41 is confined and housed in the smaller first hole groove portion 331. The connection of the spring 41 is tight. The size of the limiting block 42 is enlarged and housed in the second hole groove portion 332. The enlarged size of the limiting block 42 provides a greater limiting force for the connection between the hanging mounting block 20 and the hanging member 30, which is beneficial to the structural stability.

[0039] Furthermore, the first limiting blind groove 22 is configured as a groove structure extending radially along the mounting hole 21. The first limiting blind groove 22 is also configured as a groove structure extending radially, for the limiting block 42 to be elastically received therein. The first limiting blind groove 22 adopts a groove structure adapted to the limiting block 42, and it is limited and connected to the limiting block 42 from various sides, which helps to further improve the stability of the limiting connection. It can be understood that in other embodiments, the first limiting blind groove 22 is configured as an annular groove structure extending circumferentially along the mounting hole 21, which limits and connects to the limiting block 42 from the upper and lower sides, preventing the limiting block 42 from moving relative to it in the axial direction.

[0040] Furthermore, the mounting hole 21 further includes a stepped hole portion 212 connecting the cylindrical hole portion 211 and the external space. The mating body 31 also includes a stepped portion 312 connected to the main body portion 311 and corresponding to the stepped hole portion 212. The stepped portion 312 is received within the stepped hole portion 212 to restrict the relative movement of the hook mounting block 20 and the hook member 30 in the axial direction of the mounting hole 21. In this embodiment, the stepped connection structure further provided on the relatively outer side, together with the elastic limiting mechanism 40, provides the hook member 30 and the hook mounting block 20 to move in the axial direction of the mounting hole 21, resulting in better limiting effect and more stable connection.

[0041] Furthermore, the cross-sectional shape of the stepped hole portion 212 is set to be non-circular, and the stepped portion 312 is correspondingly received within the stepped hole portion 212 to restrict the relative rotation of the mounting block 20 and the hook member 30 corresponding to the axial direction of the mounting hole 21. In this embodiment, setting the stepped hole portion 212 and the stepped portion 312 to non-circular structures can, on the one hand, restrict the relative rotation of the mounting block 20 and the hook member 30, and on the other hand, enable blind installation during installation, thereby further improving the ease of operation and connection stability. Specifically, as shown... Figure 5 As shown, the stepped hole portion 212 and the stepped portion 312 are respectively configured as a racetrack-shaped structure, including two opposite parallel sides and two arc-shaped sides, and the structure is relatively simple.

[0042] Further, the elastic limiting mechanism 40 includes a spring 41 and a limiting block 42 sleeved on the spring 41. The two ends of the spring 41 and the limiting block 42 respectively abut against the bottom of the first limiting blind groove 22 and the bottom of the second limiting blind groove 33, or respectively abut against the bottom of the second limiting blind groove 33 and the bottom of the first limiting blind groove 22. It can be understood that, in a preferred embodiment, the spring 41 is disposed in the second limiting blind groove 33 and is installed in the mounting block 20 together with the hanger 30. During operation and assembly, the limiting block 42 and the spring 41 are kept in a compressed state so that when the hanger 30 enters the mounting hole 31... It is understood that the relative directions of the elastic limiting mechanism 40 can be interchanged. The spring 41 and the limiting block 42 are compressed in the first limiting blind groove 22 by means of a thin pressure plate. When the hanger 30 enters the mounting hole 21, the second limiting blind groove 33 corresponds to the first limiting blind groove 22, and the thin pressure plate is released, that is, the limiting block 42 can be released to enter the second limiting blind groove 33 to achieve the limiting connection.

[0043] Furthermore, the limiting block 42 includes a connecting portion 421 that sleeves the spring 41 and a limiting portion 422 that connects to the connecting portion 421. The connecting portion 421 is provided with a receiving groove 423 or a receiving hole for receiving part of the spring 41. Specifically, the receiving groove 423 is configured as an annular structure, and the spring 41 is correspondingly limited and received in the receiving groove 423, resulting in a tight connection that is not easily deformed, which is beneficial for maintaining a stable limiting connection.

[0044] Furthermore, the cylindrical hole portion 211 and the cylindrical body portion 212 are configured as corresponding cylindrical structures; the first limiting blind groove 21 and the second limiting blind groove 22 are configured such that: one of them allows the elastic limiting mechanism 40 to extend elastically in the radial direction along the mating body 31, and the other allows the elastic limiting mechanism 40 to slide circumferentially along the mating body 31 and extend elastically in the radial direction along the mating body 31.

[0045] Please refer to Figure 6 and Figure 7 In this embodiment, the overall shape of the mating body 31 and the mounting hole 21 is configured as a cylindrical mating structure. The mating body 31 can enter the mounting hole 21 axially and can also rotate relative to the inner wall of the mounting hole 21. With such an assembly structure, a limiting connection structure with a combined installation direction is formed, which further improves the stability of the limiting connection.

[0046] Furthermore, the first limiting blind groove 22 is configured as a sliding groove structure that extends from the inner wall surface of the mounting hole 21 inward along the circumference of the mating body 31, and the second limiting blind groove 33 is configured as a hole groove structure that extends radially along the mating body 31.

[0047] In this embodiment, one end of the elastic limiting mechanism 40 is housed in the second limiting blind groove 33 of the slot structure. The elastic limiting mechanism 40 rotates relative to the mounting hole 21 as the mating body 31 rotates. The end of the elastic limiting mechanism 40 away from the second limiting blind groove 33 slides relative to the sliding groove structure of the second limiting blind groove 22. Since the first limiting blind groove 22 is configured as a sliding groove structure extending from the surface inwards, the end of the elastic limiting mechanism 40 gradually penetrates deeper into the first limiting blind groove 22 as the rotation progresses until it reaches the lowest point of the first limiting blind groove 22. It can be understood that, using the technical solution of this embodiment, the above-mentioned rotational installation process can also be reversed, causing the end of the elastic limiting mechanism 40 to be gradually compressed by the first limiting blind groove 22 until it detaches. This allows the mating body 31 to be removed from the mounting hole 21, achieving disassembly. The structure is simple, the operation is convenient, and it can be used for maintenance or replacement of the ball joint connector 30.

[0048] Furthermore, the first limiting blind groove 22 extends from both ends in the circumferential direction relative to the mating body 31 towards the middle. In this embodiment, the first limiting blind groove 22 is configured as a two-segment symmetrical transition structure, allowing for free selection of the rotation direction during the aforementioned rotational installation or rotational disassembly steps, without being limited to a single direction, further improving operational convenience.

[0049] Furthermore, the end face of the elastic limiting mechanism 40 corresponding to the first limiting blind groove 22 is configured as a convex structure that transitions in the circumferential direction of the mating body 31, and the middle part of the end face protrudes from the other parts.

[0050] In this embodiment, the end face of the elastic limiting mechanism 40 corresponding to the first limiting blind groove 22 is set as a convex structure, which helps to reduce the resistance in the above-mentioned rotation operation and facilitates operation.

[0051] Please refer to Figure 1 and Figure 4 Furthermore, the mounting hole 21 is configured as a through hole structure, and the hook structure 32 of the hook member 30 is configured as two, respectively disposed at opposite ends of the mating body 31, and at least one of the hook structures 32 has a radial projection size of the hook member 30 that is not greater than the radial projection size of the mating body 31 of the hook member 30.

[0052] In this embodiment, the mounting hole 21 is a through hole structure. The hanger 30 is installed through the mounting hole 21 as a whole. For example, the mounting hole 21 is set as a vertical through hole, and the hanging structure 32 on the upper side of the hanger 30 passes through the mounting hole 21 from bottom to top. The mating body 31 is correspondingly installed and connected in the mounting hole 21. The hanger 30 is set as an integral structure, with balanced connection and stable structure. It can be understood that in other embodiments, the mounting hole 21 can also be set as a blind hole structure, for example, opening upward or downward. A hanging structure 32 is provided on the mating body 31 of the hanger 30, and the mating body 31 is installed into the mounting hole 21 to achieve assembly connection.

[0053] Furthermore, the trailer support 10 includes a generally horizontal tie rod portion 11 and a generally vertical trailer portion 12 connected to the tie rod portion 11. The mounting block 20 is configured to connect to different height positions of the trailer portion 12 to achieve adjustable towing height, adapting to trailers of different heights. The tie rod portion 11 and the trailer portion 12 are combined in a generally L-shape, with the front end of the tie rod portion 11 used to connect to the towing vehicle.

[0054] Specifically, the towing bracket 10 is provided with a plurality of vertically distributed first connecting holes 13, and the mounting block 20 is provided with second connecting holes 23. A pin 50 passes through the second connecting hole 23 and can be optionally locked to different first connecting holes 13.

[0055] In addition, the towing bracket 10 and the mounting block 20 are provided with a cooperating vertical sliding structure. Specifically, the sliding structure can be configured as a sliding rail or sliding groove cooperating structure.

[0056] The towing connection device provided by this invention comprises a towing bracket 10, a hook-up mounting block 20, and a hook-up member 30 arranged sequentially for overall assembly. The towing bracket 10 is connected to a tractor, and the hook-up member 30 is used to connect to the trailer, thereby realizing towing and hooking. The hook-up mounting block 20 has a mounting hole 21 to accommodate a mating body 31 for mounting the hook-up member 30. A first limiting blind groove 22 and a second limiting blind groove 33 are correspondingly provided on the inner wall of the mounting hole 21 and the surface of the mating body 31. An elastic limiting mechanism 40 is used to accommodate the first limiting blind groove 22 and the second limiting blind groove 23, thereby enabling the hook-up mounting block 10 to be connected to the trailer. The limiting installation of the 0 and the hanging block 20 is simple in structure and stable in connection. The elastic limiting mechanism 40 is housed in the first limiting blind groove 22 or the second limiting blind groove 23 in the compressed state. The elastic limiting mechanism 40 moves with the relative movement of the mating body 31 and the hanging block 20. When the positions of the first limiting blind groove 22 and the second limiting blind groove 23 correspond, the elastic limiting mechanism 40 extends elastically, so as to simultaneously limit the position of the mating body 31 and the hanging block 20, thereby restricting the relative movement of the mating body 31 and the hanging block 20. The operation is convenient and provides users with a good user experience.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A towing connection device, characterized in that, include: Trailer bracket; A mounting block is attached to the towing bracket, and the mounting block is provided with a mounting part; The mounting bracket includes a mating body adapted to the mounting portion and a mounting structure connected to the mating body; and, An elastic limiting mechanism is disposed between the mounting block and the mounting member, and the elastic limiting mechanism is used to limit the relative movement of the mounting block and the mounting member in the mounting part.

2. The towing connection device according to claim 1, characterized in that, The mounting part is configured as a mounting hole, and the inner wall of the mounting hole is provided with a first limiting blind groove; the mating body is provided with a second limiting blind groove corresponding to the first limiting blind groove, and the mating body is configured to be installed into the mounting hole from the outside; the elastic limiting mechanism is configured to be received in the first limiting blind groove and the second limiting blind groove, and to limit the relative movement of the hanging mounting block and the hanging member in the axial direction of the mounting hole.

3. The towing connection device according to claim 2, characterized in that, The mounting hole includes a cylindrical hole portion, the first limiting blind groove is disposed on the inner wall of the cylindrical hole portion, the mating body includes a corresponding cylindrical portion, and the second limiting blind groove is disposed on the cylindrical portion.

4. The towing connection device according to claim 3, characterized in that, The second limiting blind groove is configured as a hole groove structure extending radially along the mating body, and the elastic extension direction of the elastic limiting mechanism corresponds to the radial direction of the mating body.

5. The towing connection device according to claim 4, characterized in that, The second limiting blind groove is configured as a stepped hole groove structure, including a first hole groove portion located inside the mating body and a second hole groove portion located on the surface of the mating body. In the direction perpendicular to the corresponding radial direction of the mating body, the size of the second hole groove portion is larger than the size of the first hole groove portion. The elastic limiting mechanism includes a spring and a limiting block sleeved on the spring. The spring is housed in the first hole groove portion. In the direction perpendicular to the corresponding radial direction of the mating body, the size of the limiting block is adapted to the size of the second hole groove portion.

6. The towing connection device according to claim 5, characterized in that, The first limiting blind groove is configured as a hole groove structure extending radially along the mounting hole; or, the first limiting blind groove is configured as an annular groove structure extending circumferentially along the mounting hole.

7. The towing connection device according to claim 3, characterized in that, The mounting hole also includes a stepped hole portion that connects the cylindrical hole portion and the external space. The mating body also includes a stepped portion that is connected to the main body portion and corresponds to the stepped hole portion. The stepped portion is received in the stepped hole portion to restrict the relative movement of the mounting block and the hook member in the axial direction of the mounting hole.

8. The towing connection device according to claim 7, characterized in that, The cross-sectional shape of the stepped hole portion is set to be non-circular, and the stepped portion is correspondingly received in the stepped hole portion to restrict the relative rotation of the mounting block and the mounting member corresponding to the axial direction of the mounting hole.

9. The towing connection device according to claim 3, characterized in that, The elastic limiting mechanism includes a spring and a limiting block sleeved on the spring. The two ends of the spring and the limiting block respectively abut against the bottom of the first limiting blind groove and the bottom of the second limiting blind groove, or respectively abut against the bottom of the second limiting blind groove and the bottom of the first limiting blind groove.

10. The towing connection device according to claim 9, characterized in that, The limiting block includes a connecting part that sleeves the spring and a limiting part that connects the connecting part. The connecting part is provided with a receiving groove or receiving hole for receiving a portion of the spring.

11. The towing connection device according to claim 3, characterized in that, The cylindrical hole portion and the cylindrical body portion are configured as corresponding cylindrical structures; the first limiting blind groove and the second limiting blind groove are configured such that: one of them allows the elastic limiting mechanism to extend elastically along the radial direction of the mating body, and the other allows the elastic limiting mechanism to slide circumferentially along the mating body and extend elastically along the radial direction of the mating body.

12. The towing connection device according to claim 11, characterized in that, The first limiting blind groove is configured as a sliding groove structure that extends from the inner wall surface of the mounting hole inward along the circumference of the mating body, and the second limiting blind groove is configured as a hole groove structure that extends radially along the mating body.

13. The towing connection device according to claim 12, characterized in that, The first limiting blind groove extends from both ends in the circumferential direction relative to the mating body towards the middle; and / or, The end face of the elastic limiting mechanism corresponding to the first limiting blind groove is configured as a convex structure that transitions and extends in the circumferential direction of the mating body, with the middle part of the end face protruding from the other parts.

14. The towing connection device according to claim 3, characterized in that, The mounting hole is configured as a through hole structure, and the hook structure of the hook member is configured as two, respectively located at opposite ends of the mating body. The projection size of at least one hook structure in the radial direction of the hook member is not greater than the projection size of the mating body in the radial direction of the hook member.

15. The towing connection device according to claim 1, characterized in that, The trailer hitch includes a generally horizontal tie rod portion and a generally vertical trailer portion connected to the tie rod portion. The mounting blocks are configured to connect to different height positions of the trailer portion. The towing bracket has a plurality of vertically distributed first connecting holes, and the mounting block has a second connecting hole, through which a pin can be optionally locked to different first connecting holes; and / or, The towing bracket and the mounting block are provided with a vertical sliding structure for cooperation.

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