Height-adjustable rear dragging structure and vehicle

Abstract

The utility model relates to a height-adjustable rear dragging structure and a vehicle. The height-adjustable rear dragging structure comprises a first connecting plate, a height adjusting assembly, a guide rail, a second connecting plate and a motor home connecting piece. The motor home connecting piece is fixedly mounted on the second connecting plate; the second connecting plate is fixedly mounted on the guide rail; the height adjusting assembly is mounted on the first connecting plate and comprises an adjusting part and a driving part connected with the adjusting part; the height adjusting assembly is connected with the second connecting plate or the guide rail through a driving part, and when the adjusting part is subjected to preset external force in the preset direction, the driving part drives the motor home connecting piece to move in the height direction. The position of the motor home connecting piece in the height direction can be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of lower vehicle body parts, in particular to a height-adjustable rear drag structure and a vehicle. Background Art

[0002] With rising living standards, recreational vehicles (RVs) have become a common mode of travel. Trailer RVs are a subcategory of RVs. Unlike self-propelled RVs, trailer RVs lack their own power and require a separate vehicle to tow them. In the prior art, trailer RVs typically have a connecting ring at the front end, which connects to a ball joint at the rear end of the tractor. However, because neither the connecting ring nor the ball joint can be adjusted in height, connection problems can occur when the tractor's ball joint and the trailer RV's connecting ring are at different heights.

[0003] For example, patent document CN 214929268U discloses a towing-friendly RV, in which a rotating rod rotates about a rotating pin, and turning a second handle drives the end gear and the spacer seat to adjust the position of the screw on the inner side of the right end bottom of the rotating rod. Adjusting the rotating rod and changing the position of the screw adjusts the position of the lock. When the lock is adjusted to directly above the RV unhooking, turning the first handle drives the screw to change the height of the tow bar, completing the engagement of the lock with the RV tow hook. During the connection process, the user does not need to frequently move the position and spacing between the RV tow hook and the lock, making the operation simple and quick, and avoiding the user's difficulty in quickly completing the towing connection of the RV in complex environments. However, this towing-friendly RV can only adjust the lock in the vehicle's front-to-back direction (the vehicle's X-direction), but still cannot adjust the vehicle's height.

[0004] Therefore, it is necessary to develop a new height-adjustable rear drag structure and vehicle. Utility Model Content

[0005] The purpose of the utility model is to provide a height-adjustable rear towing structure and vehicle, which can achieve height-adjustable position of a recreational vehicle connecting part.

[0006] In a first aspect, the utility model provides a height-adjustable rear towing structure comprising a first connecting plate, a height adjustment assembly, a guide rail, a second connecting plate, and a recreational vehicle connector;

[0007] The RV connector is fixedly mounted on the second connecting plate;

[0008] The second connecting plate is fixedly mounted on the guide rail;

[0009] The height adjustment assembly is mounted on the first connecting plate, and the height adjustment assembly includes an adjustment portion and a driving portion connected to the adjustment portion;

[0010] The height adjustment assembly is connected to the second connecting plate or the guide rail through a driving part. When the adjustment part is subjected to a preset external force in a preset direction, the driving part drives the RV connector to move in the height direction.

[0011] Optionally, the height adjustment assembly further comprises a cam mounting seat, a first end of which is fixedly mounted on the first connecting plate;

[0012] The adjusting portion includes a cam mounted on a cam mounting seat, and the cam is capable of rotating about its axis when subjected to a preset external force in a clockwise or counterclockwise direction, and an adjusting slot having a preset length in a height direction of the vehicle is formed on the cam;

[0013] The driving part is a pin, the first end of which is located in the adjustment slot, and the second end of which is fixed to the second connecting plate or the guide rail. Composed of multiple parts, if a part is damaged by external forces during use, the damaged part can be replaced individually, reducing maintenance costs and conserving resources.

[0014] Optionally, a guide groove is provided on the second end of the cam mounting seat;

[0015] The guide rail is installed in the guide groove, and the guide rail can slide up and down along the guide groove. When the guide rail is driven to move up and down, it is guided and limited by the guide groove.

[0016] Optionally, the cam mounting seat includes an upper cam mounting block and a lower cam mounting block that are arranged in parallel up and down;

[0017] The first end of the cam upper mounting block and the first end of the cam lower mounting block are both fixed to the first connecting plate;

[0018] The guide groove includes an upper guide groove formed on the second end of the upper mounting block of the cam and a lower guide groove formed on the second end of the lower mounting block of the cam.

[0019] Optionally, the adjustment portion further includes a handle;

[0020] The lower end of the cam is rotatably mounted on the cam lower mounting block, and the upper end of the cam is rotatably mounted on the cam upper mounting block. The handle is fixedly connected to the upper end of the cam, and rotating the cam by the handle is more convenient and labor-saving.

[0021] Optionally, the cross section of the guide rail is a "convex" shape, and the cross section of the guide groove is adapted to the cross section of the guide rail; this can effectively prevent the guide rail from falling out of the guide groove.

[0022] Optionally, the first end is the front end and the second end is the rear end, which facilitates installation.

[0023] Optionally, the RV connecting piece is a connecting ball head.

[0024] Optionally, the guide rail is divided into two sections, upper and lower, and each section is welded to the second connecting plate as one body;

[0025] Alternatively, the guide rail and the second connecting plate are integrally formed.

[0026] In a second aspect, the present invention provides a vehicle that adopts the height-adjustable rear drag structure described in the present invention.

[0027] Beneficial effects of the utility model:

[0028] (1) The utility model can adjust the vertical position of the RV connector simply, reliably and steplessly by manually rotating the adjustment portion of the height adjustment assembly, so that the vehicle can be adapted to different models of trailer RVs.

[0029] (2) The utility model can be disassembled without the need for dragging, that is, the vertical position of the RV connector can be stably adjusted without disassembly, making the connection between the vehicle and the trailer RV easier.

[0030] (3) The utility model is composed of a plurality of parts and is easy to disassemble and assemble. If a part is damaged by external force during use, the damaged part can be replaced separately, which reduces maintenance costs and saves resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is an overall schematic diagram of an embodiment of the present application;

[0032] Figure 2 This is a schematic diagram of the connection structure of the first connecting plate and the height adjustment assembly (excluding the pin) in the embodiment of the present application;

[0033] Figure 3 Schematic diagram of the connection structure of the guide rail, the second connecting plate, the RV connector and the pin in the embodiment of the present application;

[0034] Figure 4 This is a state diagram of the height-adjustable rear towing structure described in an embodiment of the present application on a motorhome;

[0035] Explanation of the accompanying drawings: 1-first connecting plate, 2-cam upper mounting block, 21-upper guide groove, 3-cam lower mounting block, 31-lower guide groove, 4-handle, 5-cam, 51-adjusting slot, 6-pin shaft, 7-guide rail, 8-second connecting plate, 9-RV connecting piece. DETAILED DESCRIPTION

[0036] The following describes the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will be able to understand the other advantages and effects of the present invention from the contents disclosed in this specification. The present invention may also be implemented or applied through different specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are merely illustrative of the present invention and are not intended to limit the scope of protection of the present invention.

[0037] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The illustrations only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0038] like Figures 1 to 4 As shown, in an embodiment of the present application, a height-adjustable rear towing structure includes a first connecting plate 1, a height adjustment assembly, a guide rail 7, a second connecting plate 8 and a motorhome connector 9. The motorhome connector 9 is fixedly mounted on the second connecting plate 8. The second connecting plate 8 is fixedly mounted on the guide rail 7. The height adjustment assembly is mounted on the first connecting plate 1, and the height adjustment assembly includes an adjustment portion and a driving portion connected to the adjustment portion. The height adjustment assembly is connected to the second connecting plate 8 or the guide rail 7 through the driving portion. When the adjustment portion is subjected to a preset external force in a preset direction, the driving portion drives the motorhome connector 9 to move in the height direction.

[0039] like Figure 1 As shown, in one embodiment of the application, the height adjustment assembly further includes a cam mounting seat, the first end of which is fixedly mounted on the first connecting plate 1. The adjustment portion includes a cam 5, which is mounted on the cam mounting seat and can rotate about its axis when subjected to a preset external force in the clockwise or counterclockwise direction. The cam 5 is also provided with an adjustment slot 51 having a preset length in the height direction of the vehicle. The driving portion is a pin 6, the first end of which is located in the adjustment slot 51, and the second end of which is fixed to the second connecting plate 8 or the guide rail 7.

[0040] like Figure 1 As shown, in one embodiment of the application, a guide groove (including an upper guide groove 21 and a lower guide groove 31) is opened on the second end of the cam mounting seat; the guide rail 7 is installed in the guide groove, and the guide rail 7 can slide up and down along the guide groove.

[0041] like Figures 1 to 4 As shown, the following description is made by taking the cam mounting seat including the cam upper mounting block 2 and the cam lower mounting block 3, and the adjustment portion including the cam 5 and the handle 4 as an example:

[0042] like Figure 1 As shown, the height-adjustable rear drag structure is integrally mounted and fixed to the rear end of the vehicle via a first connecting plate 1 .

[0043] like Figure 2 As shown, the cam upper mounting block 2 and the cam lower mounting block 3 are arranged parallel to each other, and the first ends of the cam upper mounting block 2 and the first ends of the cam lower mounting block 3 are both fixed to the first connecting plate 1. Specifically, the first end of the cam upper mounting block 2 is rigidly connected to the first connecting plate 1 by welding, and the first end of the cam lower mounting block 3 is also rigidly connected to the first connecting plate 1 by welding. An upper guide groove 21 is provided on the second end of the cam upper mounting block 2, and a lower guide groove 31 is also provided on the second end of the cam lower mounting block 3. The orientation and structure of the lower guide groove 31 and the upper guide groove 21 are the same. Preferably, the first ends of the cam upper mounting block 2 and the first ends of the cam lower mounting block 3 are both front ends, and the second ends of the cam upper mounting block 2 and the second ends of the cam lower mounting block 3 are both rear ends, and the openings of the lower guide groove 31 and the upper guide groove 21 are both rearward facing.

[0044] like Figure 2 As shown, cam 5 is located between upper cam mounting block 2 and lower cam mounting block 3. The lower end of cam 5 is mounted on lower cam mounting block 3 via a rotating shaft, while the upper end of cam 5 is rotatably mounted on upper cam mounting block 2 via a rotating shaft. The rotating shaft at the upper end of cam 5 is welded or bolted to handle 4. Rotating handle 4 drives cam 5 to rotate about its own axis. Rotating handle 4 makes operation more convenient and labor-saving.

[0045] In order to prevent the handle 4 from rotating during use, the handle 4 is connected to the cam upper mounting block 2 through a thread; or the upper end of the cam 5 is connected to the cam upper mounting block 2 through a thread; or other anti-rotation structures are provided.

[0046] like Figure 3 As shown, the guide rail 7 is installed in the lower guide groove 31 and the upper guide groove 21. The rear end of the pin 6 is fixedly mounted on the front end surface of the second connecting plate 8 (or mounted on the guide rail 7), and the front end of the pin 6 is located in the adjustment groove 51. When the guide rail 7 rotates, the pin 6 moves along the adjustment groove 51, thereby achieving the height adjustment of the RV connector 9.

[0047] like Figure 3 As shown, the RV connector 9 adopts a connecting ball head, which is fixedly mounted on the second connecting plate 8 .

[0048] like Figure 3 As shown, the guide rail 7 is divided into two sections, an upper section and a lower section, which are respectively welded to the second connecting plate 8. Alternatively, the guide rail 7 and the second connecting plate 8 are formed into an integral part by an integrated machine.

[0049] like Figure 2 and Figure 3 As shown, the cross section of the guide rail 7 is a "convex" shape, and the cross section of the guide groove is adapted to the cross section of the guide rail 7. It can effectively prevent the guide rail 7 from falling out of the guide groove.

[0050] In the embodiment of the present application, the working principle of a height-adjustable rear drag structure is as follows:

[0051] When it is necessary to raise or lower the position of the RV connector 9, rotate the handle 4 clockwise or counterclockwise. Since the handle 4 is rigidly connected to the cam 5, the handle 4 can drive the cam 5 to rotate synchronously. Since the front end of the pin 6 is located in the adjusting groove 51, and the pin 6 and the guide rail 7, the second connecting plate 8, and the RV connector 9 are a whole, when the cam 5 rotates, the cam 5 can drive the pin 6 to move in the adjusting groove 51, so that the guide rail 7 slides up and down along the lower guide groove 31 and the upper guide groove 21, thereby moving the RV connector 9 up and down, thereby realizing the adjustable position of the RV connector 9 in the height direction.

[0052] like Figure 4 As shown, in an embodiment of the present application, a vehicle adopts the height-adjustable rear towing structure as described in the embodiment of the present application. When the vehicle adopts this height-adjustable rear towing structure, since the RV connector 9 thereon is adjustable in height, the vehicle can be adapted to different models of trailer RVs.

[0053] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by those skilled in the art based on the present invention shall fall within the protection scope of the present invention.

Claims

1. A height-adjustable rear drag structure, characterized in that: It comprises a first connecting plate (1), a height adjustment assembly, a guide rail (7), a second connecting plate (8) and a recreational vehicle connecting piece (9); The RV connecting piece (9) is fixedly mounted on the second connecting plate (8); The second connecting plate (8) is fixedly mounted on the guide rail (7); The height adjustment component is mounted on the first connecting plate (1), and comprises an adjustment part and a driving part connected to the adjustment part; The height adjustment component is connected to the second connection plate (8) or the guide rail (7) via a driving part, and when the adjustment part is subjected to a preset external force in a preset direction, the driving part drives the RV connection part (9) to move in the height direction.

2. The height-adjustable rear drag structure according to claim 1, characterized in that: The height adjustment assembly further comprises a cam mounting seat, a first end of which is fixedly mounted on the first connecting plate (1); The adjustment portion comprises a cam (5), the cam (5) being mounted on a cam mounting seat, and the cam (5) being capable of rotating about its axis when subjected to a preset external force in a clockwise or counterclockwise direction, and an adjustment slot (51) having a preset length in a height direction of the vehicle is provided on the cam (5); The driving part is a pin shaft (6), a first end of the pin shaft (6) is located in the adjustment groove (51), and a second end of the pin shaft (6) is fixed to the second connecting plate (8) or the guide rail (7).

3. The height-adjustable rear drag structure according to claim 2, characterized in that: A guide groove is provided on the second end of the cam mounting seat; The guide rail (7) is installed in the guide groove, and the guide rail (7) can slide up and down along the guide groove.

4. The height-adjustable rear drag structure according to claim 3, characterized in that: The cam mounting seat comprises an upper cam mounting block (2) and a lower cam mounting block (3) which are arranged in parallel up and down; The first end of the cam upper mounting block (2) and the first end of the cam lower mounting block (3) are both fixed on the first connecting plate (1); The guide groove comprises an upper guide groove (21) formed on the second end of the cam upper mounting block (2) and a lower guide groove (31) formed on the second end of the cam lower mounting block (3).

5. The height-adjustable rear drag structure according to claim 4, characterized in that: The adjustment portion also includes a handle (4); The lower end of the cam (5) is rotatably mounted on the cam lower mounting block (3), and the upper end of the cam (5) is rotatably mounted on the cam upper mounting block (2), and the handle is fixedly connected to the upper end of the cam (5).

6. The height-adjustable rear drag structure according to claim 3, characterized in that: The cross section of the guide rail (7) is a "convex" shape, and the cross section of the guide groove is adapted to the cross section of the guide rail (7).

7. The height-adjustable rear drag structure according to claim 4, characterized in that: The first end is a front end, and the second end is a rear end.

8. The height-adjustable rear drag structure according to claim 1, characterized in that: The RV connecting piece (9) is a connecting ball head.

9. The height-adjustable rear drag structure according to claim 1, characterized in that: The guide rail (7) is divided into two sections, an upper section and a lower section, and each section is welded to the second connecting plate (8) as a whole; Alternatively, the guide rail (7) and the second connecting plate (8) are integrally formed by an injection molding machine.

10. A vehicle, characterized in that: A height-adjustable rear drag structure as described in any one of claims 1 to 9 is adopted.

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