Hidden trailer hook quick release device

Abstract

The utility model relates to trailer hook dismounting technical field, and disclose hidden trailer hook quick release device, including trailer hook and rear pole, the rear pole is fixed in the car tail through both sides mounting sheet, and the L shape card slot is opened symmetrically in the recess inner wall in the base in -side through the upper and lower ends of connecting column are equipped with the clamping block, realize the plug -in type rotary assembly of trailer hook and base. When installing, the clamping block is axially inserted along the vertical section of L shape card slot, rotates the trailer hook after reaching the end, the reset action of compression spring can push the T type sliding sleeve, make the clamping block and L shape card slot closely adhere, need not to rely on torque wrench, special tool such as special sleeve to complete dismounting, effectively solve the problem that the inside hidden trailer hook dismounting in the prior art relies on special tool, cannot be quickly dismounted under the emergency scene because of not carrying the tool or the tool loss damage, satisfy the demand of'just install and use'of emergency rescue, temporary traction etc. scene.

Description

Technical Field

[0001] This utility model relates to the field of trailer hitch disassembly technology, and in particular to a concealed trailer hitch quick-release device. Background Technology

[0002] With the rapid development of the automotive industry, consumer demand for vehicles has gradually expanded from simple transportation tools to diversified scenarios such as emergency rescue, outdoor recreation, and cargo transportation. As a core component for realizing vehicle towing function, the rationality of the tow hook's design directly affects the user experience and the overall performance of the vehicle. At the same time, in today's aesthetically-conscious economy, the integrity and aesthetics of the vehicle's appearance have become important factors for users when making a purchase. Traditional exposed tow hooks, because they protrude from the exterior of the vehicle body for a long time, are prone to collisions with pedestrians and obstacles during daily driving, posing safety hazards. Currently, concealed tow hooks have become the mainstream configuration for passenger cars, SUVs, and light commercial vehicles. When not in use, their main structure is completely stored in the reserved space inside the rear bumper of the vehicle, with only a removable cover plate matching the color and material of the rear bumper concealing the installation area.

[0003] Currently, concealed trailer hitches are widely used in various vehicle models. However, due to the limitations of traditional fixed connection structures, their use is constrained. The connecting components of these trailer hitches (such as bolt sets, pins + cotter pins) are mostly standardized designs adapted to the vehicle body base. Disassembly and assembly require specialized tools such as torque wrenches and special sockets, and alignment of the holes must be achieved through the narrow space inside the rear bumper. In emergency scenarios (such as highway breakdowns or roadside assistance), users often do not carry specialized tools, and the existing connection structure cannot eliminate the reliance on tools during operation.

[0004] Some users choose to carry specialized tools with them in their vehicles, which not only increases the burden of carrying tools and the time cost of installation, but also makes it difficult to quickly complete disassembly and assembly when tools are lost, damaged, or bolts are rusted and stuck. This makes it difficult to meet the "ready to use" needs in scenarios such as emergency rescue and temporary towing. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a concealed trailer hitch quick-release device.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a concealed trailer hitch quick-release device, including a tow hook and a rear bumper. The rear bumper is fixed to the rear of the vehicle by mounting plates on both sides. A base is welded to the middle of the rear bumper. A connecting post is fixedly installed on the side of the tow hook near the rear bumper. Locking blocks are fixedly installed at the upper and lower ends of the connecting post. The inner side of the base is provided with a groove that matches the connecting post. Two L-shaped slots are symmetrically opened on the inner wall of the groove inside the base. The size of the locking blocks matches the size of the L-shaped slots. A guide rod is fixedly installed at the center of the inner end of the base. A T-shaped sliding sleeve is slidably provided on the surface of the guide rod. A guide hole that matches the guide rod is opened at the center of the connecting post. A compression spring is fixedly installed on the T-shaped sliding sleeve near the inner end of the base.

[0007] Preferably, the compression spring is fixedly installed on the inner end of the base on the side away from the T-shaped sliding sleeve, and the compression spring is sleeved on the surface of the guide rod.

[0008] Preferably, the inner upper edge of the L-shaped slot and the side of the card block facing the tow hook are both provided with toothed grooves, and the toothed grooves on the inner side of the L-shaped slot and the toothed grooves on the card block are adapted to each other.

[0009] Preferably, the locking block is first inserted axially into the vertical section along the L-shaped slot, and then rotated when it reaches the end of the L-shaped slot, so that the two are engaged by utilizing the reset effect of the compression spring.

[0010] Preferably, a damping ring is fixedly installed on the surface of the guide rod. The damping ring is made of elastic rubber, and the inner wall of the T-shaped sleeve is provided with multiple arc-shaped grooves that are adapted to the damping ring at equal intervals.

[0011] Preferably, when the L-shaped groove and the locking block engage with each other through the toothed groove, the damping ring engages with the first arc-shaped groove at the end of the T-shaped sliding sleeve.

[0012] Preferably, the diameter of the multiple arc-shaped grooves on the inner wall of the T-shaped sleeve is larger than the diameter of the guide rod, and the distance between them is 1-2 mm.

[0013] Preferably, the outer wall of the end of the tow hook away from the connecting post is provided with anti-slip texture, and the opening edge of the groove on the inner side of the base is provided with a chamfer, the chamfer angle being 30°-45°. When the connecting post is inserted into the groove of the base, the chamfer can guide the connecting post to quickly align with the groove.

[0014] In summary, this utility model has the following beneficial effects:

[0015] 1. This utility model achieves plug-in rotational assembly of the tow hook and the base by setting locking blocks at both ends of the connecting column and symmetrically opening L-shaped slots on the inner wall of the groove on the inner side of the base. During installation, the locking blocks are inserted axially along the vertical section of the L-shaped slot. After reaching the end, the tow hook is rotated, and the restoring action of the compression spring can push the T-shaped sliding sleeve, so that the locking blocks and the L-shaped slot are tightly fitted. Disassembly and assembly can be completed without relying on special tools such as torque wrenches and special sockets. This effectively solves the problem that the disassembly and assembly of the internally hidden tow hook in the prior art relies on special tools, and cannot be quickly disassembled and assembled in emergency scenarios due to lack of tools or loss or damage of tools. It meets the "install and use" requirements of emergency rescue, temporary towing and other scenarios.

[0016] 2. By opening matching toothed grooves on the inner upper edge of the L-shaped groove and on the side of the block facing the tow hook, when the block is inserted into the L-shaped groove and rotated to the designated position, the restoring force of the compression spring pushes the T-shaped sleeve, so that the block and the toothed groove of the L-shaped groove mesh with each other. Utilizing the anti-loosening characteristics of the toothed structure, the axial and circumferential displacement of the block in the L-shaped groove is effectively limited, avoiding the safety hazard of loosening of the tow hook due to vehicle vibration and load changes during traction, or even causing the tow hook body to shake or separate. This significantly improves the connection reliability and load-bearing stability of the tow hook during use, and ensures the safety of traction operations.

[0017] 3. By fixing a damping ring made of elastic rubber to the surface of the guide rod, and opening arc-shaped grooves at equal intervals on the inner wall of the T-shaped sleeve to match the damping ring, when the locking block and the L-shaped locking groove are engaged with each other through the toothed groove, the damping ring is precisely engaged with the first arc-shaped groove at the end of the T-shaped sleeve. Through the clamping force of the damping ring and the arc-shaped groove, an additional limit is formed on the T-shaped sleeve and the connecting column, avoiding the unexpected axial movement of the locking block inward due to accidental contact with the tow hook, severe bumps during vehicle movement, or other unforeseen factors, thereby preventing the toothed groove from disengaging and causing the tow hook to detach from the base, further improving the safety of the device during use, and ensuring that the tow hook always maintains a stable connection state when not in use or in traction. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the separation structure of the tow hook and the base of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal sectional view of the base of this utility model;

[0021] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0022] Figure 5This is a schematic diagram of the connection structure between the card block and the L-shaped card slot of this utility model;

[0023] Figure 6 This is a schematic diagram of the internal exploded structure of the base of this utility model.

[0024] Figure label:

[0025] 1. Tow hook;

[0026] 2. Rear bumper; 201. Base;

[0027] 3. Connecting post; 301. Locking block;

[0028] 4. L-shaped slot; 401. Toothed groove;

[0029] 5. Guide rod; 501. Guide hole;

[0030] 6. T-type sliding sleeve;

[0031] 7. Compression spring;

[0032] 8. Damping ring; 801. Arc-shaped ring groove. Detailed Implementation

[0033] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0034] The specific embodiments of this utility model are described below with reference to the accompanying drawings:

[0035] Example: Reference Figures 1-6 The concealed trailer hitch quick-release device includes a tow hook 1 and a rear bumper 2. The rear bumper 2 is fixed to the rear of the vehicle by mounting plates on both sides. A base 201 is welded to the middle of the rear bumper 2. A connecting post 3 is fixedly installed on the side of the tow hook 1 near the rear bumper 2. A locking block 301 is fixedly installed at the upper and lower ends of the connecting post 3. The inner side of the base 201 is provided with a groove that matches the connecting post 3. Two L-shaped slots 4 are symmetrically opened on the inner wall of the groove inside the base 201. The size of the locking block 301 matches the size of the L-shaped slot 4. A guide rod 5 is fixedly installed at the center of the inner end of the base 201. A T-shaped sliding sleeve 6 is slidably provided on the surface of the guide rod 5. A guide hole 501 that matches the guide rod 5 is opened at the center of the connecting post 3. A compression spring 7 is fixedly installed at the position of the T-shaped sliding sleeve 6 near the inner end of the base 201.

[0036] Specifically: In actual use, the L-shaped groove 4 on the inner wall of the groove cooperates with the locking blocks 301 at the upper and lower ends of the connecting column 3. The trajectory of the L-shaped groove 4 constrains the locking blocks 301 to complete the "insertion-rotation" action, realizing the initial positioning of the tow hook 1 and the base 201. The compression spring 7 fitted with the T-shaped sliding sleeve 6 stores the reset potential energy when the connecting column 3 is inserted into the base 201 and pushes the T-shaped sliding sleeve 6; when the locking block 301 rotates to the end of the horizontal section of the L-shaped groove 4, the compression spring 7 releases the potential energy to push the T-shaped sliding sleeve 6 to press against the connecting column 3, so that the locking block 301 and the L-shaped groove 4 fit tightly together, strengthening the connection between the tow hook 1 and the base 201.

[0037] In specific operation, align the guide hole 501 of the connecting post 3 with the guide rod 5 and push the hook 1 so that the locking block 301 is inserted into the vertical section of the L-shaped slot 4 and the spring 7 is compressed. Rotate the hook 1 to let the locking block 301 enter the horizontal section, and the spring returns to its original position and tightens the connecting post 3 to complete the installation. When disassembling, rotate the hook 1 in the opposite direction to let the locking block 301 return to the vertical section, and pull it outward to separate. No special tools are required throughout the process, which can achieve quick disassembly and assembly.

[0038] The compression spring 7 is fixedly installed on the inner end of the base 201 on the side away from the T-shaped sliding sleeve 6. The compression spring 7 is sleeved on the surface of the guide rod 5. The inner upper edge of the L-shaped slot 4 and the side of the block 301 facing the tow hook 1 are both provided with toothed grooves 401. The toothed grooves 401 on the inner side of the L-shaped slot 4 and the toothed grooves 401 of the block 301 are matched. The block 301 is first inserted axially into the vertical section along the L-shaped slot 4, and rotates when it reaches the end of the L-shaped slot 4. The two are engaged by the reset effect of the compression spring 7.

[0039] Specifically: In actual use, the guide rod 5 constrains the spring deformation trajectory, laying the foundation for the stable transmission of subsequent reset force. The concave and convex structure of the toothed groove 401 can form a physical limit when the block 301 and the L-shaped groove 4 are engaged, preventing relative sliding between the two under traction load or vehicle vibration. At the same time, in conjunction with the reset effect of the compression spring 7, the engagement tightness can be further enhanced. When the block 301 is axially inserted into the end along the vertical section of the L-shaped groove 4 and rotated, the compression spring 7 releases the reset force to push the T-shaped sliding sleeve 6. The T-shaped sliding sleeve 6 presses against the connecting column 3, causing the block 301 to move closer to the inner upper edge of the L-shaped groove 4, and finally the toothed grooves 401 of the two are precisely engaged, realizing a stable connection between the tow hook 1 and the base 201, avoiding the problem of easy loosening in traditional connection methods.

[0040] In specific operation, the operator aligns the locking block 301 with the vertical section of the L-shaped slot 4 and inserts it axially until it reaches the end of the slot. At this time, the connecting column 3 pushes the T-shaped sliding sleeve 6 to compress the spring 7, and the spring stores the reset potential energy. Then, the tow hook 1 is rotated, which drives the locking block 301 to move along the horizontal section of the L-shaped slot 4. After the locking block 301 is in place, the reset force of the compression spring 7 is transmitted to the connecting column 3 through the T-shaped sliding sleeve 6, which causes the toothed groove 401 of the locking block 301 to tightly engage with the toothed groove 401 of the L-shaped slot 4, thus completing the stable installation of the tow hook 1. The whole process does not require special tools, and the engagement structure can ensure the reliability of the connection.

[0041] A damping ring 8 is fixedly installed on the surface of the guide rod 5. The damping ring 8 is made of elastic rubber and the inner wall of the T-shaped sleeve 6 is provided with multiple arc-shaped ring grooves 801 that are adapted to the damping ring 8 at equal intervals. When the L-shaped slot 4 and the slot block 301 are engaged with each other through the toothed groove 401, the damping ring 8 is engaged with the first arc-shaped ring groove 801 at the end of the T-shaped sleeve 6.

[0042] Specifically, in actual use, the damping ring 8 is made of elastic rubber, which has deformable characteristics. It can achieve a tight fit with the arc-shaped groove 801 through elastic deformation, and can also deform appropriately under force for easy disengagement. Simultaneously, the damping properties of the rubber material reduce wear and tear between components, extending the structural lifespan. Multiple arc-shaped grooves 801 are all adapted to the size of the damping ring 8, providing multiple engagement positions for the damping ring 8. Furthermore, the arc-shaped groove structure provides stable positioning of the damping ring 8, preventing it from easily disengaging under unexpected external forces.

[0043] The diameter of the multiple arc-shaped grooves 801 on the inner wall of the T-sleeve 6 is larger than the diameter of the guide rod 5, and the distance between them is 1-2mm. This provides sufficient space for the damping ring 8 on the surface of the guide rod 5, preventing excessive deformation and damage when the damping ring 8 engages with the arc-shaped grooves 801 due to insufficient space. The limited distance also ensures a tight fit after the damping ring 8 is embedded in the arc-shaped grooves 801, preventing excessive gaps from causing limit failure. Simultaneously, it does not affect the smooth sliding of the T-sleeve 6 along the guide rod 5, ensuring the proper engagement of the damping ring 8 with the arc-shaped grooves 801. To ensure reliable fit and flexible movement of the sliding sleeve, the outer wall of the end of the hook 1 away from the connecting post 3 is provided with anti-slip texture, and the opening edge of the groove on the inner side of the base 201 is provided with a chamfer, with a chamfer angle of 30°-45°. When the connecting post 3 is inserted into the groove of the base 201, the chamfer can guide the connecting post 3 to quickly align with the groove. When there is a slight deviation in the alignment direction of the connecting post 3 with the groove, the chamfer can guide the connecting post 3 to automatically correct its position through the contact of the inclined surface, eliminating the need for operators to repeatedly adjust the alignment, greatly reducing the difficulty of alignment before inserting the connecting post 3, and shortening the disassembly and assembly preparation time.

[0044] The working principle of this utility model is as follows: In specific use, the operator first holds the tow hook 1 and aligns the connecting post 3 on one side of the tow hook 1 with the groove inside the base 201 in the middle of the rear bumper 2. At the same time, the guide hole 501 in the center of the connecting post 3 is precisely aligned with the guide rod 5 at the inner end of the base 201. Then, the operator pushes the connecting post 3 axially along the guide rod 5, so that the locking blocks 301 at the upper and lower ends of the connecting post 3 are inserted into the vertical section of the L-shaped slot 4 on the inner wall of the groove of the base 201. During this process, the end of the connecting post 3 will contact the T-shaped sliding sleeve 6 inside the base 201 and push the T-shaped sliding sleeve 6 to slide along the guide rod 5 towards the inner end of the base 201, thereby compressing the compression spring 7 sleeved on the surface of the guide rod 5 until the locking block 301 slides to the end of the vertical section of the L-shaped slot 4. At this time, the operator rotates the tow hook 1, causing the connecting column 3 and the locking block 301 to rotate along the horizontal section of the L-shaped slot 4. When the locking block 301 rotates to the end of the horizontal section of the L-shaped slot 4, the operator stops applying force. Under the action of its own elastic restoring force, the compression spring 7 pushes the T-shaped sleeve 6 to slide in the opposite direction. The T-shaped sleeve 6 pushes the connecting column 3 and the locking block 301 to move away from the inner end of the base 201, so that the toothed groove 401 on the side of the locking block 301 facing the tow hook 1 meshes with the toothed groove 401 on the upper inner edge of the L-shaped slot 4. At the same time, the elastic rubber damping ring 8 on the surface of the guide rod 5 is just inserted into the first arc-shaped ring groove 801 at the end of the inner wall of the T-shaped sleeve 6. The clamping force of the damping ring 8 and the arc-shaped ring groove 801 forms an axial limit on the T-shaped sleeve 6 and the connecting column 3, completing the stable installation of the tow hook 1 and the base 201, ensuring that the tow hook 1 will not move axially or rotate circumferentially during the traction process.

[0045] When it is necessary to disassemble the tow hook 1, the operator first holds the tow hook 1 and applies axial thrust towards the inner end of the base 201 to overcome the clamping force between the damping ring 8 and the arc-shaped groove 801, pushing the connecting column 3 and the T-shaped sliding sleeve 6 to compress the compression spring 7 again, so that the toothed groove 401 between the locking block 301 and the L-shaped groove 4 is disengaged. After the toothed groove 401 is completely separated, the operator rotates the tow hook 1 in the opposite direction, causing the locking block 301 to rotate back from the horizontal section of the L-shaped groove 4 to the vertical section. Then, the operator pulls the tow hook 1 axially outward along the guide rod 5, so that the connecting column 3 and the locking block 301 are disengaged along the vertical section of the L-shaped groove 4. At the same time, the guide hole 501 in the center of the connecting column 3 separates from the guide rod 5, completing the disassembly of the tow hook 1. The entire disassembly and assembly process does not require any external special tools, and through the cooperation of the damping ring 8 and the arc-shaped ring groove 801, it can effectively prevent the connecting column 3 from axially moving due to unexpected factors such as vehicle driving bumps and accidental collisions, and avoid the toothed groove 401 from accidentally disengaging or the locking block 301 from falling out of the L-shaped locking groove 4, thus ensuring the safety and reliability of the device during use.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A concealed trailer hitch quick-release device, comprising a tow hook (1) and a rear bumper (2), characterized in that: The rear bumper (2) is fixed to the rear of the car by mounting plates on both sides. A base (201) is welded to the middle of the rear bumper (2). A connecting post (3) is fixedly installed on the side of the tow hook (1) near the rear bumper (2). A locking block (301) is fixedly installed at the upper and lower ends of the connecting post (3). The inner side of the base (201) is provided with a groove that matches the connecting post (3). Two L-shaped slots (4) are symmetrically opened on the inner wall of the groove inside the base (201). The size of the locking block (301) matches the size of the L-shaped slot (4). A guide rod (5) is fixedly installed at the center of the inner end of the base (201). A T-shaped sleeve (6) is slidably provided on the surface of the guide rod (5). A guide hole (501) that matches the guide rod (5) is opened at the center of the connecting post (3). A compression spring (7) is fixedly installed at the position of the T-shaped sleeve (6) near the inner end of the base (201).

2. The concealed trailer hitch quick-release device according to claim 1, characterized in that: The compression spring (7) is fixedly installed on the inner end of the base (201) on the side away from the T-shaped sliding sleeve (6), and the compression spring (7) is sleeved on the surface of the guide rod (5).

3. The concealed trailer hitch quick-release device according to claim 1, characterized in that: The inner upper edge of the L-shaped slot (4) and the side of the block (301) facing the tow hook (1) are both provided with toothed grooves (401), and the toothed grooves (401) on the inner side of the L-shaped slot (4) and the toothed grooves (401) of the block (301) are compatible.

4. The concealed trailer hitch quick-release device according to claim 1, characterized in that: The card block (301) is first inserted axially into the vertical section along the L-shaped slot (4), and rotates when it reaches the end of the L-shaped slot (4). The compression spring (7) is used to reset the two and make them engage.

5. The concealed trailer hitch quick-release device according to claim 1, characterized in that: A damping ring (8) is fixedly installed on the surface of the guide rod (5). The damping ring (8) is made of elastic rubber and the inner wall of the T-shaped sleeve (6) is provided with multiple arc-shaped grooves (801) that are adapted to the damping ring (8).

6. The concealed trailer hitch quick-release device according to claim 5, characterized in that: When the L-shaped groove (4) and the locking block (301) engage with each other through the toothed groove (401), the damping ring (8) engages with the first arc-shaped ring groove (801) at the end of the T-shaped sliding sleeve (6).

7. The concealed trailer hitch quick-release device according to claim 6, characterized in that: The diameter of the multiple arc-shaped annular grooves (801) on the inner wall of the T-shaped sleeve (6) is larger than the diameter of the guide rod (5), and the distance between them is 1-2 mm.

8. The concealed trailer hitch quick-release device according to claim 1, characterized in that: The outer wall of the end of the hook (1) away from the connecting post (3) is provided with anti-slip texture. The opening edge of the groove inside the base (201) is provided with a chamfer, the chamfer angle is 30°-45°. When the connecting post (3) is inserted into the groove of the base (201), the chamfer can guide the connecting post (3) to quickly align with the groove.

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