Vehicle tail hook extension structure

Abstract

The problem that the height of an existing tow hook is difficult to adjust is solved. The vehicle tail hook extending structure comprises a driving base used for controlling steering, a first-stage hook, a second-stage hook and a connecting base. Wherein the driving seat is fixedly arranged on the connecting seat, and the connecting seat is used for being fixedly connected with an external vehicle structure; the first-stage hook is arranged at a movable part of the driving seat; a round ball head is further arranged at the end, away from the driving base, of the first-stage hook, and the second-stage hook is detachably connected and fixed to the round ball head of the first-stage hook in a sleeved mode. The overall height of the hook is adjusted, an object higher than the hook part can be dragged more stably, and in addition, a frame installed on the hook can be lifted.

Description

Technical Field

[0001] This utility model relates to the field of automobile tow hook technology, and in particular to an extension structure for a rear hook. Background Technology

[0002] During vehicle use, to cope with unexpected situations, a tow hook is usually installed at the rear of the vehicle. This tow hook is not only used for towing the vehicle but also for attaching external racks such as luggage racks and bicycle racks. Existing tow hook structures, to avoid interference or collision with the vehicle's exterior when not in use and to improve the vehicle's aesthetics, typically employ a rotating structure, as shown in patents CN118722086A and CN120327155A. However, the overall height of existing tow hook structures is usually difficult to adjust, which can cause inconvenience and even danger during towing operations with height differences; it also makes it difficult to adjust the height of externally mounted racks. Therefore, a height-adjustable rear-end tow hook extension structure is needed. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies and provide a tail hook extension structure.

[0004] To solve the above problems, the present invention adopts the following solution:

[0005] A rear hook extension structure includes a drive seat for controlling steering, a first-stage hook, a second-stage hook, and a connecting seat; wherein the drive seat is fixedly mounted on the connecting seat, and the connecting seat is used for fixed connection with an external vehicle structure; the first-stage hook is located on the movable part of the drive seat; the end of the first-stage hook away from the drive seat is also provided with a ball head for preventing the hook rope from coming off, and the second-stage hook is detachably sleeved and fixed to the ball head of the first-stage hook.

[0006] Furthermore, the top of the second-stage hook is provided with a ball head portion; the interior of the second-stage hook is provided with a cavity corresponding to the ball head portion of the first-stage hook.

[0007] Furthermore, the overall shape of the ball head is spherical.

[0008] Furthermore, the second-level hook includes two symmetrically arranged shells, each shell comprising a hemispherical top block and a bottom block with a hemispherical groove, the top block and the bottom block being integrally formed.

[0009] Furthermore, the bottom block has an overall hemispherical shape, and the edge of the bottom block is provided with a connecting skirt that extends outward along the radial direction of the hemispherical shape. The connecting skirt is provided with a first threaded hole for fastening.

[0010] Furthermore, the top block is also provided with a second threaded hole for interconnection; the second threaded hole is a countersunk hole.

[0011] Furthermore, the drive base includes a drive motor, a drive shaft, rollers, and a positioning element; wherein the drive motor is connected to the drive shaft, and the drive shaft rotates with the movement of the drive motor; the drive shaft is provided with a plurality of first grooves that match the rollers; when the rollers are located in the first grooves on the drive shaft, the rollers are close to the axis of the drive shaft; when the rollers are located in other parts of the drive shaft, the rollers are far from the axis of the drive shaft; the positioning element is sleeved on the outside of the drive shaft, and the positioning element is also fixedly connected to the connecting seat; the positioning element is provided with a plurality of through holes for embedding the rollers, and the rollers are located in the through holes; one end of the first-stage hook is rotatably sleeved on the outer periphery of the positioning disk, and the rollers are located between the first-stage hook and the drive shaft; the inner wall of the part of the first-stage hook that sleeves the positioning disk is also provided with a plurality of second grooves that match the rollers.

[0012] Furthermore, the first-stage hook is generally shaped like a hook, with an annular tubular structure at one end for rotatably connecting with the positioning component, and a ball head at the other end.

[0013] Furthermore, the first-stage hook is also provided with a wiring mounting hole, which is used to install a terminal block for connecting external electrical components.

[0014] The beneficial effects of this utility model are as follows:

[0015] By designing the structure of the shell in the second-level hook, the connection between the second-level hook and the first-level hook is made stable, making it less prone to deflection and affecting the stability of the load.

[0016] By designing the structure of the drive seat, the first-stage hook can switch between locking and releasing under the action of the drive motor. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0018] Figure 2 This is an exploded view of the overall structure of Example 1;

[0019] Figure 3 This is a schematic diagram of the first-stage hook in Example 1;

[0020] Figure 4 This is a schematic diagram of the housing of the second-stage hook in Example 1;

[0021] Figure 5 This is a front view of the overall structure of Example 1;

[0022] Figure 6 for Figure 5 A schematic diagram of the AA cross-section.

[0023] Explanation of reference numerals in the attached drawings: drive base 1, drive motor 11, drive shaft 12, roller 13, positioning element 14, first groove 15, first-stage hook 2, ball head 21, second groove 22, wiring mounting hole 23, second-stage hook 3, housing 31, connecting skirt 32, first threaded hole 33, second threaded hole 34, connecting base 4. Detailed Implementation

[0024] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0025] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the figures only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0026] Example 1:

[0027] like Figures 1-6 As shown, a rear-end hook extension structure includes a drive seat 1 for controlling steering, a first-stage hook 2, a second-stage hook 3, and a connecting seat 4. The drive seat 1 is fixedly mounted on the connecting seat 4, which is used for fixed connection to an external vehicle structure. The first-stage hook 2 is located on the movable part of the drive seat 1. The end of the first-stage hook 2 furthest from the drive seat 1 is provided with a ball head 21 to prevent the hook rope from slipping off. It should be noted that the ball head 21 is usually spherical; however, since its main function is to prevent the hook rope from slipping off, in some other embodiments, the ball head 21 can be set as a mushroom head or other structure that forms a barrier between it and the first-stage hook 2. The second-stage hook 3 is detachably sleeved and fixed to the ball head 21 of the first-stage hook 2. With the cooperation of the second-stage hook 3 and the first-stage hook 2, the overall height of the hook extends upwards, making it more stable when dragging objects higher than the hook, and also raising the frame mounted on the hook.

[0028] The second-stage hook 3 has a ball head 21 at its top; the interior of the second-stage hook 3 has a cavity corresponding to the ball head 21 of the first-stage hook 2, so that the second-stage hook 3 can be directly fitted onto the first-stage hook 2 to achieve a fixed connection between the two; the ball head 21 of the first-stage hook 2 also has a cylindrical extension, which is located between the ball head 21 and the first-stage hook 2, and the extension, ball head 21 and first-stage hook 2 are integrally formed; when the second-stage hook 3 is connected to the first-stage hook 2, the extension is also located in the cavity of the second-stage hook 3, which enhances the connection stability between the second-stage hook 3 and the first-stage hook 2 and prevents deflection due to the outer arc surface of the ball head 21. In this example, the second-stage hook 3 includes two symmetrically arranged shells 31. Each shell 31 includes a hemispherical top block and a bottom block with a hemispherical groove. The top block and the bottom block are integrally formed. The bottom block has a hemispherical shape, and its edge has a connecting skirt 32 extending outward along the radial direction of the hemispherical shape. The connecting skirt 32 has a first threaded hole 33 for fastening. The top block also has a second threaded hole 34 for interconnection. When the two shells 31 are connected to form the second hook, the connecting skirts 32 on the two shells 31 also fit together, making it easy to fix with screws. The second threaded hole 34 is a countersunk hole, which allows the bolts used for connection to be recessed into the countersunk hole, avoiding interference with ropes tied to the outside or equipment fixed to the outside.

[0029] The drive base 1 includes a drive motor 11, a drive shaft 12, rollers 13, and a positioning element 14; wherein the drive motor 11 is connected to the drive shaft 12, and the drive shaft 12 rotates with the movement of the drive motor 11; the drive shaft 12 is provided with a plurality of first grooves 15 that match the rollers 13; when the rollers 13 are located in the first grooves 15 on the drive shaft 12, the rollers 13 are close to the axis of the drive shaft 12; when the rollers 13 are located in other parts of the drive shaft 12, the rollers 13 are away from the drive shaft 12. The axis of the drive shaft 12 is shown. The positioning element 14 is cylindrical and hollow inside. It is sleeved on the outside of the drive shaft 12 and is also fixedly connected to the connecting seat 4. The positioning element 14 has several through holes for embedding rollers 13, which are located inside the through holes. One end of the first-stage hook 2 is rotatably sleeved on the outer periphery of the positioning disk, and the roller 13 is located between the first-stage hook 2 and the drive shaft 12. The inner wall of the first-stage hook 2 where it sleeves the positioning disk also has several second grooves 22 that match the rollers 13. Due to the restrictive effect of the positioning element 14, the rollers 13 can only move within their through holes. On the other hand, with the rotation of the drive shaft 12, in conjunction with the structure of the first groove 15, the rollers 13 move radially along the drive shaft 12 within the through holes, thereby locking or releasing the first-stage hook 2.

[0030] The first-stage hook 2 is generally shaped like a hook, with an annular tubular structure at one end for rotatable connection with the positioning member 14, and a ball head 21 at the other end. The first-stage hook 2 is also provided with a wiring mounting hole 23, which is used to install a terminal block for connecting external electrical components. These terminal blocks are usually connected to the vehicle's power supply to power the electrical equipment connected to the terminal block, such as indicator lights on the rack mounted on the hook.

[0031] During implementation, by setting the first-level hook 2 and the detachable second-level hook 3, the overall height of the hook can be adjusted, which makes it more stable when dragging objects higher than the hook. In addition, it can also raise the frame installed on the hook. By setting the structure of the housing 31 in the second-level hook 3, the connection between the second-level hook 3 and the first-level hook 2 is stable and it is not easy to deflect, which would affect the stability of the load. By setting the structure of the drive seat 1, the first-level hook 2 can switch between locking and releasing under the action of the drive motor 11.

[0032] The above description is merely a specific example of this utility model and does not constitute any limitation on this utility model. Obviously, those skilled in the art, after understanding the content and principle of this utility model, may make various modifications and changes in form and details without departing from the principle and structure of this utility model. However, these modifications and changes based on the concept of this utility model are still within the protection scope of the claims of this utility model.

Claims

1. A tail hook extension structure, characterized in that, It includes a drive seat (1) for controlling steering, a first-stage hook (2), a second-stage hook (3), and a connecting seat (4); wherein the drive seat (1) is fixedly mounted on the connecting seat (4), and the connecting seat (4) is used to fixally connect with the external vehicle structure; the first-stage hook (2) is located on the movable part of the drive seat (1); the end of the first-stage hook (2) away from the drive seat (1) is also provided with a ball head (21) to prevent the hook rope from coming off, and the second-stage hook (3) is detachably sleeved and fixed to the ball head (21) of the first-stage hook (2).

2. The tail hook extension structure according to claim 1, characterized in that, The top of the second-level hook (3) is provided with a ball head (21) part; the interior of the second-level hook (3) is provided with a cavity corresponding to the ball head (21) part of the first-level hook (2).

3. The tail hook extension structure according to claim 2, characterized in that, The ball head (21) is spherical in shape.

4. The tail hook extension structure according to claim 3, characterized in that, The second-level hook (3) includes two symmetrically arranged shells (31). The shell (31) includes a hemispherical top block and a bottom block with a hemispherical groove. The top block and the bottom block are integrally formed.

5. The tail hook extension structure according to claim 4, characterized in that, The bottom block has a hemispherical shape, and the edge of the bottom block is provided with a connecting skirt (32) extending outward along the radial direction of the hemispherical shape. The connecting skirt (32) is provided with a first threaded hole (33) for fastening.

6. The tail hook extension structure according to claim 5, characterized in that, The top block is also provided with a second threaded hole (34) for interconnection; the second threaded hole (34) is a countersunk hole.

7. The tail hook extension structure according to claim 1, characterized in that, The drive base (1) includes a drive motor (11), a drive shaft (12), rollers (13), and a positioning element (14); wherein the drive motor (11) is connected to the drive shaft (12) for transmission, and the drive shaft (12) rotates with the action of the drive motor (11); the drive shaft (12) is provided with a plurality of first grooves (15) that match the rollers (13); when the rollers (13) are located in the first grooves (15) on the drive shaft (12), the rollers (13) are close to the axis of the drive shaft (12); when the rollers (13) are located in other parts of the drive shaft (12), The roller (13) is away from the axis of the drive shaft (12); the positioning member (14) is sleeved on the outside of the drive shaft (12), and the positioning member is also fixedly connected to the connecting seat (4); the positioning member (14) is provided with several through holes for embedding the roller (13), and the roller (13) is located in the through holes; one end of the first-stage hook (2) is rotatably sleeved on the outer periphery of the positioning disk, and the roller (13) is located between the first-stage hook (2) and the drive shaft (12); the first-stage hook (2) is also provided with several second grooves (22) matching the roller (13) on the inner wall of the part where it sleeves the positioning disk.

8. The tail hook extension structure according to claim 7, characterized in that, The first-level hook (2) is in the shape of a bent hook. One end of it is provided with an annular tubular structure for rotating connection with the positioning member (14), and the other end is provided with a ball head (21).

9. The tail hook extension structure according to claim 8, characterized in that, The first-stage hook (2) is also provided with a wiring mounting hole (23), which is used to install a terminal block for connecting external electrical components.

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