An automatic locking device for vehicle tow hooks

Abstract

This utility model discloses an automatic locking device for vehicle tow hooks, relating to the field of vehicle tow hook technology. It includes a tow hook mechanical device and a trailer sling. The device is characterized by further including an automatic locking key assembly, comprising an upper key and a lower key. The upper key is fixed to the bottom sidewall of the guide sleeve of the tow hook mechanical device and located at the front end of the guide sleeve. The lower key is disposed on the top mating surface of the trailer sling and located behind the pin hole of the trailer sling. When the trailer sling moves to the preset mating position, the lower key collides with the upper key, forcing the trailer sling to stop axial movement. Simultaneously, the mechanical engagement eliminates radial freedom, ensuring complete alignment between the trailer sling and the pin hole, thus achieving automatic positioning of the tow hook mechanical device and the trailer sling. This automatic locking device for vehicle tow hooks achieves precise automatic locking between the tow hook and the trailer sling, eliminating the need for manual intervention.

Description

Technical Field

[0001] This utility model relates to the field of vehicle tow hook technology, and in particular to an automatic locking device for vehicle tow hooks. Background Technology

[0002] Some vehicles require manual operation for most of the towing hook operation, and the docking between the towing hook and the trailer sling is not precise, resulting in low docking efficiency, low operational efficiency, and certain dangers. Some towing auxiliary equipment has achieved semi-automatic technology, but still requires manual calibration, and is not precise enough in docking operations, and its operational stability is not high. Utility Model Content

[0003] The purpose of this invention is to provide an automatic locking device for vehicle tow hooks to solve the problems existing in the prior art, achieve precise automatic locking between the tow hook and the trailer swivel, and eliminate the need for manual intervention.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides an automatic locking device for a vehicle tow hook, which also includes an automatic locking key assembly. The automatic locking key assembly includes an upper key and a lower key. The upper key is fixed to the bottom side wall of the guide sleeve of the tow hook mechanism and is located at the front end of the guide sleeve. The lower key is disposed on the top mating surface of the trailer ring and is located behind the pin hole of the trailer ring. When the trailer ring moves to the preset mating position, the lower key collides with the upper key, forcing the trailer ring to stop axial movement. At the same time, the radial degree of freedom is eliminated through mechanical engagement, ensuring that the trailer ring is completely aligned with the pin hole, thereby realizing the automatic positioning of the tow hook mechanism and the trailer ring.

[0006] Preferably, the guide housing of the towing hook mechanical device is connected to the towing rod through a guide sleeve; the pin is placed in the hole of the guide housing, and the pin can pass through the trailer ring. The upper end of the pin is provided with a U-shaped groove, and a cylindrical pin is provided between the U-shaped grooves. The bottom of the U-shaped groove is a sloping structure; a limiting mechanism is provided on the guide housing; a cover is provided on the top of the guide housing and fixed with screws; the rocker arm is connected to the handle through a spline; the upper end of the compression spring is placed on the cover, and the lower end is connected to the rocker arm through a cylindrical pin and a lower spring guide seat; the rubber buffer block, buffer block pad, and fixing seat are connected to the towing rod through a slotted nut.

[0007] The present invention achieves the following technical advantages over the prior art:

[0008] In the process of aligning the trailer ring and the pin, the upper and lower convex keys make contact with each other. The complementary geometry of the upper and lower convex keys forces the trailer ring to stop axial movement. At the same time, the radial degree of freedom is eliminated through mechanical engagement, ensuring that the trailer ring and the pin hole are completely aligned. The collision sensing of the upper and lower convex keys realizes the one-time accurate automatic positioning of the towing hook and the trailer ring, which solves the problems of manual calibration required during towing operations, which poses safety risks and low work efficiency. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the locking state of the automatic locking device for vehicle towing hooks in this utility model;

[0011] Figure 2 This is a schematic diagram of the disengaged state of the automatic locking device for vehicle towing hooks in this utility model;

[0012] In the diagram: 1. Guide sleeve; 2. Pin; 3. Guide sleeve; 4. Guide housing; 5. Cylindrical pin; 6. Limiting mechanism; 7. Cover; 8. Compression spring; 9. Guide seat; 10. Rocker arm; 11. Handle; 12. Trailer ring; 13. Drawbar; 14. Pressure plate; 15. Return spring; 16. Buffer block pad; 17. Fixed seat; 18. Slotted nut; 19. Upper convex key; 20. Lower convex key. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] The purpose of this invention is to provide an automatic locking device for vehicle tow hooks to solve the problems existing in the prior art.

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] The automatic locking device for the vehicle tow hook in this embodiment, such as Figures 1-2 As shown, the device includes a tow hook mechanism and a trailer ring 12, as well as an automatic locking key assembly. The automatic locking key assembly includes an upper key 19 and a lower key 20. The upper key 19 is fixed to the bottom side wall of the guide sleeve 3 of the tow hook mechanism and is located at the front end of the guide sleeve 3. The lower key 20 is disposed on the top mating surface of the trailer ring 12 and is located behind the pin hole of the trailer ring 12. When the trailer ring 12 moves to the preset mating position, the lower key 20 collides with the upper key 19, forcing the trailer ring 12 to stop axial movement. At the same time, the radial degree of freedom is eliminated through mechanical engagement, ensuring that the trailer ring 12 is completely aligned with the pin 2 hole of the tow hook mechanism, thereby realizing the automatic positioning of the tow hook mechanism and the trailer ring 12.

[0017] In this specific embodiment, the guide housing 4 of the towing hook mechanical device is connected to the towing rod 13 through the guide sleeve 1 and the guide sleeve 3; the pin 2 is placed in the hole of the guide housing 4, and the pin 2 can pass through the trailer ring 12. The upper end of the pin 2 is provided with a U-shaped groove, and the cylindrical pin 5 is provided between the U-shaped grooves. The bottom of the U-shaped groove is a sloping structure; the guide housing 4 is provided with a limiting mechanism 6; the top of the guide housing 4 is provided with a cover 7, which is fixed with screws; the rocker arm 10 is connected to the handle 11 through a spline; the upper end of the compression spring 8 is placed on the cover 7, and the lower end is connected to the rocker arm 10 through the cylindrical pin 5 and the lower spring guide seat 9; the rubber buffer block, the buffer block pad 14, and the pressure plate; 16 and the fixed seat 17 are connected to the towing rod 13 through the slotted nut 18.

[0018] During operation, the top of the rocker arm 10, under the elastic force of the compression spring 8, rests against the semi-circular concave point of the U-shaped groove of the pin 2, preventing the pin 2 from moving up and down. When it is necessary to disengage the tractor from the trailer ring 12, the driver should first pull out the limiting pin of the limiting mechanism 6, then turn the handle 11, causing the rocker arm 10 to rotate together. During the rotation of the rocker arm 10, the compression spring 8 simultaneously hooks the pin 2 at its top, thus disengaging the trailer ring 12 from the pin 2. When the pin 2 is lifted to the top, continued force will cause the cylindrical pin 5 to be jammed at the right angle at the top of the rocker arm 10 under the action of the conical spring, locking the pin 2 and preventing it from sliding down automatically, thus keeping the pin 2 in a disengaged state, achieving the desired effect. Figure 2 The state shown allows the tractor and trailer to separate.

[0019] When it is necessary to connect the trailer to the tractor, the driver manipulates the tractor to align the guide housing of the towing device with the trailer ring 12. When the lower protruding key 20 on the trailer ring 12 engages with the upper protruding key 19 on the guide sleeve 3, the driver stops the tractor, ensuring that the pin hole of the trailer ring 12 is fully aligned with the pin 2 hole of the towing hook mechanism. The driver then disengages the rocker arm 10 from the cylindrical pin 5. Under the action of the compression spring 8, the rocker arm 10 moves and presses against the U-shaped groove of the pin 2. Under the elastic force of the compression spring 8, the pin 2 inserts into the trailer ring 12 and the guide sleeve 1, achieving the desired connection. Figure 1 The state shown.

[0020] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An automatic locking device for a vehicle tow hook, comprising a tow hook mechanical device and a trailer swivel, characterized in that: It also includes an automatic locking key assembly, which includes an upper key and a lower key. The upper key is fixed to the bottom side wall of the guide sleeve of the towing hook mechanism and is located at the front end of the guide sleeve. The lower key is disposed on the top mating surface of the trailer ring and is located behind the pin hole of the trailer ring. When the trailer ring moves to the preset mating position, the lower key collides with the upper key, forcing the trailer ring to stop axial movement. At the same time, the radial degree of freedom is eliminated through mechanical engagement, ensuring that the trailer ring is completely aligned with the pin hole, thereby realizing the automatic positioning of the towing hook mechanism and the trailer ring.

2. The automatic locking device for vehicle tow hooks according to claim 1, characterized in that: The guide housing and the towing rod of the towing hook mechanical device are connected together by a guide sleeve and a guide bushing; the pin is placed in the hole of the guide housing, and the pin can pass through the trailer ring. The upper end of the pin is provided with a U-shaped groove, and a cylindrical pin is provided between the U-shaped grooves. The bottom of the U-shaped groove is a sloping structure; a limiting mechanism is provided on the guide housing; a cover is provided on the top of the guide housing and fixed with screws; the rocker arm is connected to the handle through a spline; the upper end of the compression spring is placed on the cover, and the lower end is connected to the rocker arm through a cylindrical pin and a lower spring guide seat; the rubber buffer block, buffer block pad, and fixing seat are connected to the towing rod through a slotted nut.

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