Self-adjusting trailer hitch

Abstract

The utility model relates to trailer technology field especially relates to a self -adjusting trailer hook. The self -adjusting trailer hook includes box seat, is equipped with lock bar and is installed with main drive part and auxiliary drive part in box seat upper. The self -adjusting trailer hook provided by the utility model drives the driving toothed plate to slide down through the depression pedal, makes the lock rod retract the installation cavity through the linkage of the middle gear linkage toothed plate slide up, does not need to manually dismount the lock, and the reset force of spring A and spring B is relied on to automatically complete the locking after loosening, and the operation can be completed by a single person, when the trailer hook is inserted into the insertion port, extrusion resistance arc plate drives the sleeve joint to rotate around the rotating shaft, the limiting rod on the folding plate is separated from the limiting hole of the driving toothed plate, the driving toothed plate resets under the action of spring A, the linkage toothed plate drives the lock rod to insert into the locking hole and completes the locking, and the whole process does not need additional operation, responds quickly and locks reliably, and in the locking state, the lock rod inserts into the locking hole and the resistance arc plate sticks to the trailer hook, forming double limiting.

Description

Technical Field

[0001] This utility model relates to the field of trailer technology, and in particular to a self-adjusting trailer hook. Background Technology

[0002] As a key component connecting the tractor and trailer, the stability and ease of operation of the trailer hook directly affect towing safety and efficiency. Currently, traditional trailer hooks mostly employ a manual plug-in locking structure, which suffers from cumbersome operation and insufficient locking reliability. Manually tightening or pulling the locking lever to lock the hook takes a considerable amount of time during the preparation phase before towing, especially when operated by a single person. It is difficult to simultaneously ensure the alignment of the tractor and trailer and the locking operation. Furthermore, relying on a single locking component (such as a bolt or clip) can easily lead to loosening due to vibration after prolonged use, posing a risk of the hook falling off.

[0003] Therefore, it is necessary to provide a new self-adjusting trailer hitch to solve the above-mentioned technical problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a self-adjusting trailer hook.

[0005] The self-adjusting trailer hook provided by this utility model includes a housing, the housing having an insertion port for attaching the trailer hook, and the housing having an installation cavity, the installation cavity having a locking rod and a main drive component and an auxiliary drive component for driving the locking rod to open and close.

[0006] The main drive component includes a central gear, which is rotatably installed in the mounting cavity. A drive gear plate and a linkage gear plate are respectively meshed on both sides of the central gear. Both the drive gear plate and the linkage gear plate are slidably connected to the mounting cavity. A limit hole is provided on the drive gear plate, and the locking rod is installed on the linkage gear plate.

[0007] The auxiliary drive component includes a rotating shaft, which is rotatably mounted in the mounting cavity and fitted with a torsion spring. A sleeve ring is fitted on the rotating shaft, a pressing block is fixedly mounted on one side of the sleeve ring, and a folding plate is fixedly mounted on the other side of the sleeve ring. A limit rod is fixedly mounted on the folding plate.

[0008] Preferably, a spring A is fixedly installed at the bottom of the drive tooth plate, and the other end of the spring A is fixedly connected to the bottom wall of the mounting cavity. The top of the drive tooth plate extends out of the top wall of the housing and is fixedly installed with a foot pedal.

[0009] Preferably, a horizontally arranged side plate is fixedly installed on the linkage tooth plate, and a spring B is fixedly installed on the top of the side plate. The other end of the spring B is fixedly connected to the top wall of the mounting cavity. The locking rod is fixedly installed at the bottom of the side plate and inserted into the insertion hole provided in the housing, and the insertion hole and the insertion port are interconnected.

[0010] Preferably, the bottom of the insertion port has a locking hole on the base that corresponds to the locking rod.

[0011] Preferably, one end of the torsion spring is fixedly connected to the side wall of the sleeve ring, and the other end of the torsion spring is fixedly connected to the inner wall of the mounting cavity.

[0012] Preferably, the pressing block extends to the insertion port and is fixedly installed with an abutting arc plate.

[0013] Preferably, a mounting plate is fixedly installed on the back of the housing.

[0014] Preferably, both sides of the drive tooth plate and the linkage tooth plate are fixedly fitted with limiting protrusions, and the limiting protrusions are inserted into the sliding groove provided in the housing and are slidably connected to the sliding groove.

[0015] Compared with related technologies, the self-adjusting trailer hook provided by this utility model has the following beneficial effects:

[0016] 1. This utility model allows the drive plate to slide down by pressing down the pedal, and then the drive plate slides up through the linkage of the central gear, causing the locking rod to retract into the mounting cavity. There is no need to manually disassemble the lock. After being released, the locking is automatically completed by the restoring force of spring A and spring B. The operation can be completed by a single person, which greatly improves the work efficiency.

[0017] 2. When the tow hook is inserted into the insertion port, the pressing and abutting arc plate drives the sleeve to rotate around the pivot, causing the limiting rod on the folding plate to disengage from the limiting hole of the drive tooth plate. The drive tooth plate is reset under the action of spring A, and the linkage tooth plate drives the locking rod to insert into the locking hole to complete the locking. No additional operation is required throughout the process. The response is rapid and the locking is reliable. In the locked state, the locking rod is inserted into the locking hole and the abutting arc plate is in contact with the tow hook, forming a double limit. Even if one component fails, the other component can still provide basic locking capability. Attached Figure Description

[0018] Figure 1 A schematic diagram of a preferred embodiment of the self-adjusting trailer hook provided by this utility model;

[0019] Figure 2 for Figure 1 A cross-sectional view of the box base shown.

[0020] Figure 3 for Figure 2 The diagram shows the structure of the main drive component;

[0021] Figure 4 for Figure 2 The diagram shows the structure of the auxiliary drive component.

[0022] The following are the labeling elements in the diagram: 1. Base; 1a. Insertion port; 1b. Mounting cavity; 1c. Locking hole; 2. Locking rod; 3. Main drive component; 31. Connecting gear; 32. Drive gear plate; 32a. Limiting hole; 321. Spring A; 322. Foot pedal; 33. Linkage gear plate; 331. Side plate; 332. Spring B; 4. Auxiliary drive component; 41. Rotating shaft; 42. Sleeve ring; 421. Torsion spring; 43. Pressing block; 431. Abutting arc plate; 44. Folding plate; 441. Limiting rod; 5. Mounting plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0025] Please see Figures 1 to 4 This utility model provides a self-adjusting trailer hook, which includes: a base 1, a locking rod 2, a main drive component 3, and an auxiliary drive component 4.

[0026] In the embodiments of this utility model, please refer to Figures 1 to 4 A mounting plate 5 is fixedly installed on the back of the housing 1. The housing 1 has an insertion port 1a for attaching a tow hook, and a mounting cavity 1b is provided inside the housing 1. The mounting cavity 1b is provided with a locking rod 2 and a main drive component 3 and an auxiliary drive component 4 for driving the locking rod 2 to open and close.

[0027] The main drive component 3 includes a central gear 31, which is rotatably mounted in the mounting cavity 1b. A drive gear plate 32 and a linkage gear plate 33 are respectively meshed on both sides of the central gear 31. Both the drive gear plate 32 and the linkage gear plate 33 are slidably connected to the mounting cavity 1b. A limit hole 32a is provided on the drive gear plate 32. A locking rod 2 is mounted on the linkage gear plate 33. A spring A321 is fixedly mounted on the bottom of the drive gear plate 32, and the other end of the spring A321 is fixedly connected to the bottom wall of the mounting cavity 1b. The top of the plate 32 extends out of the top wall of the box base 1 and is fixedly installed with a foot pedal 322. A horizontally arranged side plate 331 is fixedly installed on the linkage tooth plate 33, and a spring B332 is fixedly installed on the top of the side plate 331. The other end of the spring B332 is fixedly connected to the top wall of the mounting cavity 1b. The locking rod 2 is fixedly installed at the bottom of the side plate 331 and inserted into the insertion hole provided in the box base 1. The insertion hole and the insertion port 1a are interconnected. The box base 1 at the bottom of the insertion port 1a has a locking hole 1c corresponding to the locking rod 2.

[0028] It should be noted that: by using screws to pass through the mounting holes of the mounting plate 5 and fixing the box seat 1 to the front of the vehicle, keeping the insertion port 1a of the box seat 1 facing forward, before locking the tow hook, pressing down the pedal 322 causes the drive gear plate 32 to slide down along the mounting cavity 1b and compress the spring A321. At the same time, the drive gear plate 32 drives the linkage gear plate 33 to slide up along the mounting cavity 1b through the central gear 31 and compress the spring B332. Therefore, the locking rod 2 slides back into the mounting cavity 1b (as shown in the attached diagram). Figure 2 As shown), and the drive tooth plate 32 is locked by the limiting rod 441 in the auxiliary drive component 4, so the insertion port 1a is in an open state so that the tow hook can be inserted into the insertion port 1a.

[0029] Both sides of the drive tooth plate 32 and the linkage tooth plate 33 are fixedly fitted with limiting protrusions, and the limiting protrusions are inserted into the sliding grooves provided in the housing 1 and slidably connected to the sliding grooves. The limiting protrusions provided on both sides of the drive tooth plate 32 and the linkage tooth plate 33 improve the stability of the drive tooth plate 32 and the linkage tooth plate 33 when sliding.

[0030] In the embodiments of this utility model, please refer to Figures 1 to 4 The auxiliary drive component 4 includes a rotating shaft 41, which is rotatably installed in the mounting cavity 1b and fitted with a torsion spring 421. A sleeve ring 42 is fitted on the rotating shaft 41. One end of the torsion spring 421 is fixedly connected to the side wall of the sleeve ring 42, and the other end of the torsion spring 421 is fixedly connected to the inner wall of the mounting cavity 1b. A pressing block 43 is fixedly installed on one side of the sleeve ring 42, and the pressing block 43 extends to the insertion port 1a and is fixedly installed with an abutting arc plate 431. A folding plate 44 is fixedly installed on the other side of the sleeve ring 42, and a limit rod 441 is fixedly installed on the folding plate 44.

[0031] In addition, when the tow hook is inserted, the abutment plate 431 rotates adaptively with the size of the tow hook, and the elastic force of the torsion spring 421 keeps it in contact with the tow hook, ensuring that the limit rod 441 accurately disengages from the limit hole 32a after the tow hook is fully inserted, thus avoiding locking failure due to differences in the size of the tow hook.

[0032] It is worth noting that in this application, the middle part of the tooth surface of the drive tooth plate 32 is a planar structure, and the limiting hole 32a is located at the planar structure. The limiting rod 441 abuts against the planar structure under the action of the torsion spring 421.

[0033] It should be noted that when the pedal 322 is pressed down, causing the drive gear plate 32 to slide down along the mounting cavity 1b, the limiting rod 441 slides along the planar structure of the drive gear plate 32 until the limiting rod 441 is inserted into the limiting hole 32a to lock the drive gear plate 32. At this time, the locking rod 2 slides back into the mounting cavity 1b, and then the tow hook is inserted into the insertion port 1a and presses against the arc plate 431. When the arc plate 431 is pressed, the sleeve ring 42 rotates around the shaft. The deflection of 41 causes the limiting rod 441 to slide out of the limiting hole 32a; therefore, under the elastic force of spring A321 and spring B332, the drive tooth plate 32 slides up along the mounting cavity 1b. At the same time, the drive tooth plate 32 drives the linkage tooth plate 33 to slide down along the mounting cavity 1b under the action of the connecting gear 31 and the elastic force of the cooperating spring B332, so that the locking rod 2 slides into the insertion port 1a and is inserted into the locking hole 1c, thus quickly completing the locking of the hook.

[0034] Among them, springs A321 and B332 are made of fatigue-resistant alloy springs, thereby improving the service life of springs A321 and B332.

[0035] The working principle of the self-adjusting trailer hook provided by this utility model is as follows:

[0036] This application allows the drive gear plate 32 to slide down by pressing down the pedal 322, which in turn drives the linkage gear plate 33 to slide up via the central gear 31, causing the locking rod 2 to retract into the mounting cavity 1b. No manual disassembly of the lock is required. After release, the locking is automatically completed by the restoring force of springs A321 and B332. This allows for operation by a single person, significantly improving work efficiency. Furthermore, the auxiliary drive component 4 works in conjunction with the main drive component 3 to achieve the "insertion-locking" function. That is, when the tow hook is inserted into the insertion port 1a, it presses against the abutment plate 431, causing the sleeve to engage. The ring 42 rotates around the shaft 41, causing the limiting rod 441 on the folding plate 44 to disengage from the limiting hole 32a of the drive tooth plate 32. The drive tooth plate 32 is reset under the action of the spring A321, and the linkage tooth plate 33 drives the locking rod 2 to insert into the locking hole 1c to complete the locking. No additional operation is required throughout the process, the response is rapid and the locking is reliable. In the locked state, the locking rod 2 is inserted into the locking hole 1c and abuts against the arc plate 431 to fit the tow hook, forming a double limit. Even if one component fails, the other component can still provide basic locking capability.

[0037] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A self-adjusting trailer hitch, characterized in that, Includes a housing (1), the housing (1) having an insertion port (1a) for attaching a tow hook, and the housing (1) having an installation cavity (1b), the installation cavity (1b) having a locking rod (2) and a main drive component (3) and an auxiliary drive component (4) for driving the locking rod (2) to open and close; The main drive component (3) includes a central gear (31), which is rotatably installed in the mounting cavity (1b). The two sides of the central gear (31) are respectively meshed with a drive gear plate (32) and a linkage gear plate (33). The drive gear plate (32) and the linkage gear plate (33) are slidably connected to the mounting cavity (1b). The drive gear plate (32) has a limit hole (32a). The locking rod (2) is installed on the linkage gear plate (33). The auxiliary drive component (4) includes a rotating shaft (41), which is rotatably installed in the mounting cavity (1b) and fitted with a torsion spring (421). A sleeve ring (42) is fitted on the rotating shaft (41). A pressing block (43) is fixedly installed on one side of the sleeve ring (42), and a folding plate (44) is fixedly installed on the other side of the sleeve ring (42). A limit rod (441) is fixedly installed on the folding plate (44).

2. The self-adjusting trailer hook according to claim 1, characterized in that, A spring A (321) is fixedly installed at the bottom of the drive tooth plate (32), and the other end of the spring A (321) is fixedly connected to the bottom wall of the mounting cavity (1b). The top of the drive tooth plate (32) extends out of the top wall of the housing (1) and is fixedly installed with a foot pedal (322).

3. The self-adjusting trailer hook according to claim 2, characterized in that, A horizontally arranged side plate (331) is fixedly installed on the linkage tooth plate (33), and a spring B (332) is fixedly installed on the top of the side plate (331). The other end of the spring B (332) is fixedly connected to the top wall of the mounting cavity (1b). The locking rod (2) is fixedly installed at the bottom of the side plate (331) and inserted into the insertion hole provided in the housing (1). The insertion hole and the insertion port (1a) are interconnected.

4. The self-adjusting trailer hook according to claim 3, characterized in that, The bottom of the insertion port (1a) has a locking hole (1c) that corresponds to the locking rod (2).

5. The self-adjusting trailer hook according to claim 1, characterized in that, One end of the torsion spring (421) is fixedly connected to the side wall of the sleeve ring (42), and the other end of the torsion spring (421) is fixedly connected to the inner wall of the mounting cavity (1b).

6. The self-adjusting trailer hook according to claim 1, characterized in that, The pressing block (43) extends to the insertion port (1a) and is fixedly installed with the abutting arc plate (431).

7. The self-adjusting trailer hook according to claim 1, characterized in that, A mounting plate (5) is fixedly installed on the back of the housing (1).

8. The self-adjusting trailer hook according to claim 3, characterized in that, Both sides of the drive tooth plate (32) and the linkage tooth plate (33) are fixedly fitted with limiting protrusions, and the limiting protrusions are inserted into the sliding groove provided in the housing (1) and slidably connected to the sliding groove.

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