Automobile towing hitch device

Abstract

The application discloses a kind of automobile towing tow hook devices, it is related to automobile tow hook technical field;And the present application includes U-shaped main plate, cover plate, tow hook seat and bottom supporting plate, the tow hook seat is rotatably connected to one end of U-shaped main plate, the cover plate is connected at the end of U-shaped main plate and cover plate, the bottom supporting plate is slidably connected to the middle of U-shaped main plate;The middle of the lower end of the two sides of U-shaped main plate is provided with horizontal sliding slot, the middle of the lower end of the two sides of U-shaped main plate is provided with inclined sliding slot on one side, the other side of the lower end of the two sides of U-shaped main plate is provided with inner rotating hole, the outer side of two the inner rotating hole is provided with outer rotating hole;The present application is slid by adopting the sliding piece lever sliding linkage structure, cooperates with sliding slot guide transmission, by poking sliding piece can realize tow hook unfolding and storage, discard traditional hidden tow hook thread rotation disassembly mode, can effectively avoid the jamming, rust death phenomenon caused by thread rust, opening and closing switch simple labor-saving, emergency use efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of automobile tow hook technology, specifically to an automobile towing tow hook device. Background Technology

[0002] The tow hook is an important component of the vehicle structure. In actual use, the tow hook and its associated structure need to withstand a large traction load. Its structural strength directly affects the reliability and safety performance of the vehicle. Therefore, the tow hook and its supporting components must have excellent structural strength and load-bearing capacity. At present, the tow hook has become an indispensable standard component of vehicles, and the related design and manufacturing have formed a complete set of automotive industry standards and specifications. Traditional concealed car tow hooks generally use a split threaded assembly structure, requiring manual alignment and screwing in before use, and then unscrewing them one by one after storage. The overall operation process is cumbersome, laborious, and inefficient. Under long-term outdoor driving conditions, mud, sand, rain, snow, and dirt can easily penetrate the threaded mating area, making it prone to problems such as moisture corrosion, thread wear, jamming, and stripping failure. In emergency rescue scenarios, it cannot be quickly disassembled and connected, seriously delaying the rescue progress, resulting in poor practicality in actual operation. At the same time, the cover plates of traditional tow hooks often use simple elastic clips. The snap-fit ​​fixing method has low alignment accuracy, resulting in large gaps and insufficient sealing after closure. It is prone to loosening and displacement during vehicle travel, causing continuous abnormal noises. Furthermore, the cover plate is not equipped with a dedicated locking and limiting structure, making it highly susceptible to accidental loosening and falling off due to airflow vibrations and road bumps during driving. This not only damages the overall appearance of the bumper but also increases driving safety hazards, resulting in a poor overall user experience. To address these issues, the inventor proposes a car towing hook device. Summary of the Invention

[0003] To address the issues of easy failure in the threaded mating area of ​​traditional split-threaded assembly structures of automobile tow hooks, and the easy loosening and displacement of the simple elastic snap-fit ​​fixing method used for the tow hook cover plate, which can cause abnormal noises during driving, the present invention aims to provide an automobile towing tow hook device.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a vehicle towing hook device, comprising a U-shaped main plate, a cover plate, a hook seat, and a base plate. The hook seat is rotatably engaged with one end of the U-shaped main plate, the cover plate is engaged with the end of the connection between the U-shaped main plate and the cover plate, and the base plate is slidably engaged with the middle of the U-shaped main plate. A transverse sliding groove is formed in the middle of the lower ends of both sides of the U-shaped main plate, an oblique sliding groove is formed on one side of the middle of the lower ends of both sides of the U-shaped main plate, and an inner rotating hole is formed on the other side of both sides of the U-shaped main plate. An outer rotating hole is formed on the outer side of each of the two inner rotating holes. A bracket is fixedly installed at the lower end of one end of the U-shaped main plate, and a connecting rod is fixedly installed in the middle of the lower end of the bracket. A bottom plate has a bottom section in the middle of its lower end. The base plate has a notch. A lever is fixedly connected to one end of the base plate. A connecting shaft one is rotatably mounted in the middle of the upper part of the base plate. Connecting shaft two is rotatably engaged at both ends of one side of the middle of the upper part of the base plate. A shaft limiting plate is fixedly mounted at both ends of both connecting shaft one and connecting shaft two. A narrow opening is provided in the middle of the connecting shaft two, and a hook spring is hooked to the surface of the narrow opening. The other end of the hook spring is hooked to a connecting rod. A rotating shaft is rotatably mounted in the middle of both sides below one end of the tow hook seat. A tow hook body is fixedly mounted in the middle of the lower part of the other end of the tow hook seat. Positioning grooves are provided at both ends of the middle of both sides below one end of the tow hook seat. Connecting shaft one is slidably engaged in the middle of the transverse sliding groove. The two connecting shafts two... The rotating shafts are respectively slidably engaged in the middle of the corresponding inclined sliding grooves. The rotating shaft limiting plates at both ends of the connecting rotating shaft one and the connecting rotating shaft two are in contact with the surfaces of the U-shaped main plate and the base plate. The rotating shaft limiting plates at both ends of the connecting rotating shaft one can be slidably engaged in the middle of the corresponding positioning grooves and limit the position of the tow hook seat. The tow hook body can pass through the notch opened in the base plate and is located in the middle of the U-shaped main plate. The two sets of positioning grooves are respectively located at 180 degrees on both sides below one end of the tow hook seat. When the rotating shaft limiting plates at both ends of the connecting rotating shaft two are located in the middle of the two positioning grooves on the side closer to the tow hook body, the tow hook seat and the tow hook body at the end are in a retracted state. When the rotating shaft limiting plates at both ends of the connecting rotating shaft two are located in the middle of the two positioning grooves on the side farther away from the tow hook body, the tow hook seat and the tow hook body at the end are in a retracted state. In the middle section, the tow hook seat and the tow hook body at the end are in the unfolded state. A rotating shaft is fixedly installed in the middle of the tow hook seat. The rotating shaft is rotatably engaged in the middle of the inner rotating hole. Positioning rings are fixedly installed on the outer side of the middle of the connection between the rotating shaft and the tow hook seat. The two positioning rings are respectively rotatably engaged in the middle of the corresponding outer rotating hole. Multiple positioning holes are evenly opened around the perimeter of the U-shaped main board near the support end. Positioning slots are opened on both sides of the middle of the middle of the U-shaped main board near the support end. Positioning plates are fixedly installed on both sides of the middle of the upper end of the U-shaped main board. When the tow hook seat is in the unfolded state, the two sides of the tow hook seat end away from the tow hook body are respectively engaged in the middle of the corresponding positioning slots, and the middle of the tow hook seat end abuts against the support.

[0005] Preferably, a plurality of positioning rods are evenly fixedly installed around one end of the cover plate, and the positioning rods are respectively inserted into the corresponding positioning plates. A through hole is provided above the middle of the cover plate, and a limiting groove is provided on the outer side of the middle of the through hole. A semi-circular limiting ring is fixedly installed in the middle of the limiting groove. A rotating rod is rotatably engaged in the middle of the through hole, and a rotary button is fixedly installed at one end of the rotating rod.

[0006] Preferably, limit blocks are fixedly installed at both ends of the middle part of the rotating rod, and one of the limit blocks near the rotating button is rotatably engaged in the middle of the first limit groove and abuts against both ends of the first semi-circular limit ring.

[0007] Preferably, a second through hole is provided above the middle of one side of the bracket, a second semi-circular limiting rotating ring is provided on the outer side of the middle of the second through hole, a second limiting rotating groove is fixedly installed in the middle of the second semi-circular limiting rotating ring, a sliding groove is provided on one side of the second semi-circular limiting rotating ring, the sliding groove passes through the second limiting rotating groove and reaches the bottom of the second through hole, and the first through hole and the second through hole are connected.

[0008] Preferably, one of the limiting blocks, which is away from the rotary button, is rotatably engaged with the middle of the semi-circular limiting ring two and abuts against both ends of the limiting groove two, while the other limiting block, which is away from the rotary button, is slidably engaged with the middle of the sliding groove.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention adopts a lever sliding linkage structure with a sliding groove guide transmission. The tow hook can be unfolded and retracted by moving the lever. It abandons the traditional hidden tow hook threaded rotation disassembly and assembly method, which can effectively avoid jamming and rusting caused by thread corrosion. The opening and closing is simple and labor-saving, and the emergency use efficiency is high. 2. This invention uses multiple limiting mechanisms, including a slide groove, a positioning groove, a rotating shaft limiting plate, a positioning slot, and a bracket, to precisely limit the retraction and unfolding positions of the tow hook, ensuring a smooth and stable rotation and sliding process without deviation or looseness. After unfolding, it forms a mechanical self-locking structure, which resists shaking and deflection during dragging, ensures uniform force transmission, and has high overall structural strength and good operational reliability. 3. In this invention, the cover plate adopts a plug-in positioning and a 180-degree damping lock with a rotating button. After closing, it is flush with the vehicle body, has good concealment, and can effectively block the intrusion of mud, water and dust from the front. It can also prevent loosening and abnormal noise caused by driving bumps, and has a longer service life. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a schematic diagram of the disassembly structure of the U-shaped main board and cover plate of the present invention; Figure 3 This is a schematic diagram of the unfolded structure in this invention; Figure 4 This is a schematic diagram showing the connection relationship between the bottom support plate and the tow hook seat in this invention; Figure 5 This is a schematic diagram showing the connection relationship between the U-shaped motherboard and the hook base in this invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the hook seat in this invention; Figure 7 This is a schematic diagram of the second appearance structure of the present invention; Figure 8 This is a disassembled diagram showing the connection relationship between the U-shaped mainboard and the base plate in this invention; Figure 9 This is a cross-sectional disassembly diagram showing the internal connection relationship between the cover plate and the bracket at the end of the U-shaped main board in this invention.

[0012] In the diagram: 1. U-shaped main board; 11. Positioning plate; 12. Horizontal slide groove; 13. Angled slide groove; 14. Inner rotating hole; 15. Outer rotating hole; 16. Positioning hole; 17. Positioning slot; 2. Cover plate; 21. Positioning rod; 22. Through hole one; 23. Limiting rotating groove one; 24. Semicircular limiting rotating ring one; 25. Rotating rod; 26. Limiting block; 27. Rotary button; 28. Bracket; 29. ​​Through hole two ; 291. Limiting groove two; 292. Semicircular limiting ring two; 293. Sliding groove; 294. Connecting rod; 3. Hook seat; 31. Hook body; 32. Rotating shaft; 33. Positioning ring; 34. Positioning groove; 4. Bottom support plate; 41. Paddle; 42. Notch; 43. Connecting shaft one; 44. Connecting shaft two; 45. Shaft limiting plate; 46. Narrow opening; 47. Hook spring. Detailed Implementation

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

[0014] Example: Figure 1-9 As shown, the present invention provides a technical solution: a vehicle towing hook device, comprising a U-shaped main plate 1, a cover plate 2, a hook seat 3, and a bottom support plate 4. The hook seat 3 is rotatably engaged with one end of the U-shaped main plate 1, the cover plate 2 is engaged with the end of the connection between the U-shaped main plate 1 and the cover plate 2, and the bottom support plate 4 is slidably engaged with the middle of the U-shaped main plate 1. A transverse sliding groove 12 is provided in the middle of the lower ends of both sides of the U-shaped main plate 1, an oblique sliding groove 13 is provided on one side of the middle of the lower ends of both sides of the U-shaped main plate 1, and an inner rotating hole 14 is provided on the other side of the lower ends of both sides of the U-shaped main plate 1. An outer rotating hole 15 is provided on the outer side of each of the two inner rotating holes 14. A bracket 28 is fixedly installed at the lower end of one end of the U-shaped main plate 1, and a connecting rod 294 is fixedly installed in the middle of the lower end of the bracket 28. The bottom support plate... 4. A notch 42 is provided in the middle of the lower end of the bottom plate 4. A lever 41 is fixedly connected to one end of the bottom plate 4. A connecting shaft 43 is rotatably installed in the middle of the upper end of the bottom plate 4. A connecting shaft 44 is rotatably engaged at both ends of one side of the middle of the upper end of the bottom plate 4. A shaft limiting plate 45 is fixedly installed at both ends of the connecting shaft 43 and the connecting shaft 44. A narrow opening 46 is provided in the middle of the connecting shaft 44. A hook spring 47 is hooked to the surface of the narrow opening 46. The other end of the hook spring 47 is hooked to the connecting rod 294. A rotating shaft 32 is rotatably installed in the middle of both sides below one end of the tow hook seat 3. A tow hook body 31 is fixedly installed in the middle of the lower part of the other end of the tow hook seat 3. A positioning groove 34 is provided at both ends of the middle of both sides below one end of the tow hook seat 3. By adopting the above technical solution, the lever-type linkage opening and closing of the concealed car tow hook 41 is realized. When in use, the lever 41 is moved to drive the bottom plate 4 to slide along the corresponding groove, thereby driving the tow hook seat 3 to rotate and unfold or retract and close. The operation is simple, the opening and closing is quick and labor-saving. After the tow hook is retracted, it will be hidden inside the U-shaped main board 1. The overall appearance of the vehicle is strong and the pedestrian protection performance is better. After unfolding, the tow hook body 31 has a reasonable stress structure and high load-bearing strength, taking into account both daily aesthetics and reliability for emergency towing.

[0015] The first connecting shaft 43 is slidably engaged in the middle of the transverse slide groove 12, and the two second connecting shafts 44 are respectively slidably engaged in the middle of the corresponding oblique slide grooves 13. The shaft limiting plates 45 at both ends of the first connecting shaft 43 and the second connecting shaft 44 are in contact with the surfaces of the U-shaped main plate 1 and the bottom support plate 4. The shaft limiting plates 45 at both ends of the first connecting shaft 43 can be slidably engaged in the middle of the corresponding positioning grooves 34 and limit the position of the hook seat 3. The hook body 31 can pass through the notch 42 opened in the bottom support plate 4 and be located in the middle of the U-shaped main plate 1. By adopting the above technical solution, the connecting shaft 1 43 and the connecting shaft 2 44 slide in the transverse slide groove 12 and the oblique slide groove 13 respectively, and the shaft limiting plate 45 achieves axial limiting and precise positioning, which can smoothly drive the tow hook seat 3 to rotate in linkage; at the same time, the shaft limiting plate 45 is inserted into the positioning groove 34 to achieve stroke limiting, and the tow hook body 31 can be smoothly stored and hidden through the notch 42, and the overall structure layout is compact.

[0016] Two sets of positioning grooves 34 are located at 180 degrees on both sides below one end of the tow hook seat 3. When the rotating shaft limiting plate 45 connecting the two ends of the rotating shaft 44 is located in the middle of the two positioning grooves 34 on the side closer to the tow hook body 31, the tow hook seat 3 and the tow hook body 31 at the end are in a retracted state. When the rotating shaft limiting plate 45 connecting the two ends of the rotating shaft 44 is located in the middle of the two positioning grooves 34 on the side away from the tow hook body 31, the tow hook seat 3 and the tow hook body 31 at the end are in an extended state.

[0017] By adopting the above technical solution, using two sets of positioning grooves 34 arranged at 180 degrees, and cooperating with the locking of the rotating shaft limiting plate 45, the two extreme working positions of the hook seat 3 retracting and unfolding can be precisely limited, so as to achieve precise locking of the opening and closing position of the hook and avoid random shaking and deviation during operation.

[0018] A rotating shaft 32 is fixedly installed in the middle of the hook seat 3. The rotating shaft 32 is rotatably engaged in the middle of the inner rotating hole 14. A positioning rotating ring 33 is fixedly installed on the outer side of the middle of the connection between the rotating shaft 32 and the hook seat 3. The two positioning rotating rings 33 are respectively rotatably engaged in the middle of the corresponding outer rotating hole 15.

[0019] By adopting the above technical solution, the tow hook seat 3 rotates smoothly around the axis through the rotational engagement of the rotating shaft 32 and the inner rotating hole 14, and the positioning rotating ring 33 and the outer rotating hole 15 are matched for limiting, thereby achieving both radial rotation and axial bidirectional limiting, and preventing the tow hook seat 3 from shifting or moving when rotating.

[0020] Multiple positioning holes 16 are evenly provided around the perimeter of the U-shaped main board 1 near the bracket 28. Positioning slots 17 are provided on both sides of the middle part of the U-shaped main board 1 near the bracket 28. Positioning plates 11 are fixedly installed on both sides of the middle part of the upper end of the U-shaped main board 1.

[0021] By adopting the above technical solution, the combination structure of positioning hole 16, positioning slot 17 and positioning plate 11 can be used to quickly install and position the U-shaped main board 1 and to securely assemble it, so that the whole device can be accurately aligned and fixed with the vehicle body bumper.

[0022] Multiple positioning rods 21 are evenly fixedly installed around one end of the cover plate 2. The positioning rods 21 are respectively inserted into the corresponding positioning plates 11. A through hole 22 is opened at the top of the middle of the cover plate 2. A limiting groove 23 is opened on the outer side of the middle of the through hole 22. A semi-circular limiting ring 24 is fixedly installed in the middle of the limiting groove 23. A rotating rod 25 is rotatably engaged in the middle of the through hole 22. A rotary button 27 is fixedly installed at one end of the rotating rod 25.

[0023] By adopting the above technical solution, the positioning rod 21 of the cover plate 2 can be precisely inserted and aligned with the positioning plate 11, thus enabling the cover plate 2 to be quickly and sealed.

[0024] Limiting blocks 26 are fixedly installed at both ends of the middle part of the rotating rod 25. One of the limiting blocks 26 near the rotating button 27 is rotatably engaged in the middle of the limiting groove 23 and abuts against both ends of the semi-circular limiting ring 24.

[0025] By adopting the above technical solution, the rotation angle of the rotating rod 25 can be precisely limited by the limiting block 26 on the rotating rod 25 in conjunction with the limiting rotating groove and the semi-circular limiting rotating ring, so as to realize the fixed angle start and stop positioning of the rotating button 27.

[0026] A second through hole 29 is provided above the middle of one side of the bracket 28. A semi-circular limiting rotating ring 292 is provided on the outer side of the middle of the second through hole 29. A limiting rotating groove 291 is fixedly installed in the middle of the semi-circular limiting rotating ring 292. A sliding groove 293 is provided on one side of the semi-circular limiting rotating ring 292. The sliding groove 293 passes through the limiting rotating groove 291 and reaches the bottom of the second through hole 29. The first through hole 22 and the second through hole 29 are connected. By adopting the above technical solution, the connection between the first perforation 22 and the second perforation 29 can form a through installation channel, which facilitates the through assembly of the rotating rod 25; at the same time, the rotating rod 25 can be rotated and guided and its angle limited by the cooperation of the second limiting rotating groove 291 and the second semi-circular limiting rotating ring 292, and the sliding groove 293 facilitates the disassembly and assembly of the cover plate 2.

[0027] One of the limiting blocks 26, which is away from the rotary button 27, is rotatably engaged in the middle of the semi-circular limiting ring 292 and abuts against both ends of the limiting groove 291. The other limiting block 26, which is away from the rotary button 27, is slidably engaged in the middle of the sliding groove 293.

[0028] By adopting the above technical solution, the limiting block 26 on the side away from the rotary button 27 simultaneously abuts against the semi-circular limiting rotating ring 292 and the limiting rotating groove 291, accurately limiting the rotation stroke and angle range of the rotating rod 25 and avoiding excessive rotation; the limiting block 26 can slide into the sliding groove 293 for positioning, which not only facilitates the overall alignment, assembly and disassembly of the rotating rod 25, but also prevents the rotating rod 25 from loosening or moving during operation.

[0029] When the hook seat 3 is in the unfolded state, the two sides of one end of the hook seat 3 away from the hook body 31 are respectively engaged with the middle of the corresponding positioning slot 17, and the middle of one end of the hook seat 3 abuts against the bracket 28. By adopting the above technical solution, the tow hook seat 3 is fixed and locked in the unfolded state by engaging with the positioning slots 17 on both sides after unfolding, and at the same time, the end abuts against the bracket 28 for limitation, which can effectively enhance the structural stability when dragged.

[0030] Working principle: This concealed car tow hook is mainly composed of a U-shaped main board 1, a cover plate 2, a tow hook seat 3, a base plate 4, a linkage shaft, a spring, and a rotation locking mechanism. The whole structure adopts a lever-paddle 41 sliding linkage, a slide groove guide, a shaft rotation limit, and a rotation button 27 locking structure, abandoning the traditional threaded engagement and disassembly method, realizing the switching between the tow hook retracting and concealing and unfolding for use, and the cover plate 2 can be closed and locked and unlocked by rotating the button 27.

[0031] Under normal conditions, the entire tow hook mechanism is housed and installed on the vehicle bumper using the positioning plates 11 on both sides of the upper end of the U-shaped main plate 1. The cover plate 2 is flush with the vehicle body, and the tow hook seat 3 and the tow hook body 31 are completely hidden inside the U-shaped main plate 1, resulting in a smooth and integrated appearance. At this time, the shaft limiting plates 45 connecting the two ends of the second shaft 44 are engaged in the positioning groove 34 on the side near the tow hook body 31. The tow hook seat 3 remains in a retracted and housed state, and in conjunction with the hook spring 47, it is hooked at the narrow opening 46 between the connecting rod 294 and the second shaft 44, which can always apply a preload force to the mechanism.

[0032] The cover plate 2 is assembled by inserting the positioning plate 11 on the U-shaped main plate 1 through the surrounding positioning rods 21, which can achieve quick alignment and sealing. The cover plate 2 is connected to the through holes 22 and 29 on the bracket 28, allowing the rotating rod 25 to pass through for assembly. The user can rotate the rotating rod 25 by rotating the button 27. Since the two sets of limiting blocks 26 on the rotating rod 25 cooperate and abut with the limiting groove 23, the semi-circular limiting ring 24 and the limiting groove 291 and the semi-circular limiting ring 292 respectively, the rotation angle of the rotating rod 25 can be precisely limited, thereby realizing the rotation locking and unlocking of the cover plate 2. The sliding groove 293 on the bracket 28 allows the far-end limiting block 26 to slide into, which facilitates the overall assembly, alignment and disassembly of the rotating rod 25. In the locked state, it can prevent the cover plate 2 from being opened accidentally. It has good sealing performance and can prevent mud, water and dust from entering the interior of the mechanism, avoid component corrosion and jamming, and extend service life. When the tow hook is needed, the cover plate 2 can be removed first. The user can operate the rotary button 27 to drive the rotating rod 25 to rotate. The limiting block 26 on the rotating rod 25 cooperates with the semi-circular limiting rotating ring 1 24, the limiting rotating groove 1 23, the semi-circular limiting rotating ring 292, and the limiting rotating groove 291 to release the corner limit. Using the avoidance structure of the sliding groove 293, the cover plate 2 can be directly removed from the end of the U-shaped main plate 1 to expose the internal tow hook linkage mechanism.

[0033] Subsequently, the user can manually move the lever 41 at the end of the base plate 4 to make the base plate 4 slide in the middle of the U-shaped main plate 1. During the sliding process of the base plate 4, the connecting shaft 1 43 at the upper end slides along the transverse slide groove 12, and the two connecting shafts 2 44 slide synchronously along the oblique slide groove 13. The movement direction is constrained by the slide groove trajectory to ensure smooth sliding without jamming. The shaft limiting plates 45 at both ends of the connecting shaft 1 43 and connecting shaft 2 44 fit against the contact surface between the U-shaped main plate 1 and the base plate 4, which can play the role of axial limiting. During the process, the shaft limiting plates 45 will be simultaneously engaged in the positioning groove 34 of the hook seat 3, causing the hook seat 3 to rotate around the inner rotating hole 14 with the rotating shaft 32 as the center. The positioning ring 33 on the outside of the rotating shaft 32 rotates and engages with the outer rotating hole 15, providing radial rotation support and axial limiting for the hook seat 3, ensuring smooth rotation without deviation or looseness.

[0034] When the lever 41 pushes the base plate 4 to its limit position, the pivot limiting plate 45 connecting the two ends of the pivot 44 locks into the middle of the positioning groove 34 on the side away from the tow hook body 31, and the tow hook seat 3 rotates into position and enters the unfolded working state. At this time, the two sides of the end of the tow hook seat 3 are locked into the positioning groove 17 of the U-shaped main plate 1, and the top surface of the end of the tow hook seat 3 abuts against the bracket 28 to form a bidirectional limiting lock, which can effectively limit the shaking, deflection and retraction of the tow hook seat 3 during towing. The load can be transmitted to the U-shaped main plate 1 and the vehicle body mounting position through the tow hook seat 3 and the pivot 32. The structure has stable load bearing and high tensile strength. In the unfolded state, the base plate 4 will automatically reset under the return force of the spring and the assistance of gravity.

[0035] After use, move the lever 41 again and repeat the above operation. When the connecting shaft 2 44 and connecting shaft 1 43 of the base plate 4 slide to the limit of the corresponding horizontal slide groove 12 and oblique slide groove 13 respectively, the shaft limiting plate 45 will disengage from the positioning groove 34. The user can then reverse the hook seat 3 to allow the hook seat 3 and the hook body 31 at the end to re-enter the U-shaped main plate 1. Then release the limiting of the lever 41, and the base plate 4 will reset under the assistance of the spring's restoring force. The corresponding shaft limiting plate 45 will also be locked into the middle of the corresponding storage positioning groove 34 to achieve the limiting, thereby restoring the closed and hidden state.

[0036] Finally, precisely align and insert the cover plate 2 with the positioning plate 11 on the U-shaped main board 1 via the positioning rod 21. Then, rotate the rotary button 27 to drive the rotating rod 25 to rotate synchronously. Simply rotate the limiting block 26 on the rotating rod 25 to the intersection with the semi-circular limiting ring 24. At this time, the limiting block 26 will be aligned with the sliding groove 293. Then, it will be pressed inward along the sliding groove 293 and the positioning hole 16 until the rotating rod 25 touches the bottom through hole 29. At this time, the rotary button 27 can be rotated again to drive the rotating rod 25 and the two limiting blocks 26 to rotate along the limiting groove 23 and the semi-circular limiting ring 292 until the limiting blocks 26 abut against the other side of the semi-circular limiting ring 24 and the limiting groove 291 respectively. The rotation angle of the rotating rod 25 is 180 degrees and has a certain damping, which can reliably fix the cover plate 2 to the end of the U-shaped main board 1, avoid the vehicle from loosening and making abnormal noises, and effectively prevent water from entering the device from the front, thereby extending the service life.

[0037] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A vehicle towing hook device, comprising a U-shaped main plate (1), a cover plate (2), a hook seat (3), and a base plate (4), characterized in that: The hook seat (3) is rotatably engaged with one end of the U-shaped main board (1), the cover plate (2) is engaged with the end of the connection between the U-shaped main board (1) and the cover plate (2), and the bottom support plate (4) is slidably engaged with the middle of the U-shaped main board (1); a transverse sliding groove (12) is provided in the middle of the lower ends of both sides of the U-shaped main board (1), an oblique sliding groove (13) is provided on one side of the middle of the lower ends of both sides of the U-shaped main board (1), an inner rotating hole (14) is provided on the other side of the lower ends of both sides of the U-shaped main board (1), and an outer rotating hole (15) is provided on the outer side of the two inner rotating holes (14); a bracket (28) is fixedly installed at the lower end of one end of the U-shaped main board (1), a connecting rod (294) is fixedly installed in the middle of the lower end of the bracket (28), and a notch (42) is provided in the middle of the lower end of the bottom support plate (4); one side of the bottom support plate (4) A paddle (41) is fixedly connected to the end of the bottom plate (4). A connecting shaft (43) is rotatably installed in the middle of the upper end of the bottom plate (4). A connecting shaft (44) is rotatably engaged at both ends of one side of the middle of the upper end of the bottom plate (4). A shaft limiting plate (45) is fixedly installed at both ends of the connecting shaft (43) and the connecting shaft (44). A narrow opening (46) is opened in the middle of the connecting shaft (44). A hook spring (47) is hooked on the surface of the narrow opening (46). The other end of the hook spring (47) is hooked to the connecting rod (294). A rotating shaft (32) is rotatably installed in the middle of both sides below one end of the tow hook seat (3). A tow hook body (31) is fixedly installed in the middle of the other end of the tow hook seat (3). A positioning groove (34) is opened at both ends of the middle of both sides below one end of the tow hook seat (3).

2. The vehicle towing hook device as described in claim 1, characterized in that, The first connecting shaft (43) is slidably engaged in the middle of the transverse slide groove (12), and the two second connecting shafts (44) are respectively slidably engaged in the middle of the corresponding oblique slide groove (13). The shaft limiting plates (45) at both ends of the first connecting shaft (43) and the second connecting shaft (44) are in contact with the surfaces of the U-shaped main plate (1) and the bottom support plate (4). The shaft limiting plates (45) at both ends of the first connecting shaft (43) can be slidably engaged in the middle of the corresponding positioning groove (34) and limit the position of the hook seat (3). The hook body (31) can pass through the notch (42) opened in the bottom support plate (4) and be located in the middle of the U-shaped main plate (1).

3. The vehicle towing hook device as described in claim 1, characterized in that, The two sets of positioning grooves (34) are located at 180 degrees on both sides below one end of the hook seat (3). When the pivot limiting plate (45) connecting the two ends of the pivot shaft (44) is located in the middle of the two positioning grooves (34) on the side close to the hook body (31), the hook seat (3) and the hook body (31) at the end are in a retracted state. When the pivot limiting plate (45) connecting the two ends of the pivot shaft (44) is located in the middle of the two positioning grooves (34) on the side away from the hook body (31), the hook seat (3) and the hook body (31) at the end are in an unfolded state.

4. The vehicle towing hook device as described in claim 1, characterized in that, A rotating shaft (32) is fixedly installed in the middle of the hook seat (3). The rotating shaft (32) is rotatably engaged in the middle of the inner rotating hole (14). A positioning rotating ring (33) is fixedly installed on the outer side of the middle of the connection between the rotating shaft (32) and the hook seat (3). The two positioning rotating rings (33) are respectively rotatably engaged in the middle of the corresponding outer rotating hole (15).

5. A vehicle towing hook device as described in claim 1, characterized in that, The U-shaped main board (1) has multiple positioning holes (16) evenly distributed around the end near the bracket (28). The U-shaped main board (1) has positioning slots (17) on both sides of the middle part of the end near the bracket (28). The U-shaped main board (1) has positioning plates (11) fixedly installed on both sides of the middle part of the upper end.

6. The vehicle towing hook device as described in claim 1, characterized in that, Multiple positioning rods (21) are evenly fixedly installed around one end of the cover plate (2). The positioning rods (21) are respectively inserted into the corresponding positioning plates (11). A through hole (22) is opened above the middle part of the cover plate (2). A limiting groove (23) is opened on the outer side of the middle part of the through hole (22). A semi-circular limiting ring (24) is fixedly installed in the middle of the limiting groove (23). A rotating rod (25) is rotatably engaged in the middle of the through hole (22). A rotary button (27) is fixedly installed at one end of the rotating rod (25).

7. A vehicle towing hook device as described in claim 6, characterized in that, Limiting blocks (26) are fixedly installed at both ends of the middle part of the rotating rod (25). One of the limiting blocks (26) near the rotating button (27) is rotated and engaged in the middle of the limiting groove (23) and abuts against both ends of the semi-circular limiting ring (24).

8. A vehicle towing hook device as described in claim 7, characterized in that, A second through hole (29) is provided above the middle of one side of the bracket (28). A semi-circular limiting rotating ring (292) is provided on the outer side of the middle of the second through hole (29). A limiting rotating groove (291) is fixedly installed in the middle of the semi-circular limiting rotating ring (292). A sliding groove (293) is provided on one side of the semi-circular limiting rotating ring (292). The sliding groove (293) passes through the limiting rotating groove (291) and reaches the bottom of the second through hole (29). The first through hole (22) and the second through hole (29) are connected.

9. A vehicle towing hook device as described in claim 8, characterized in that, One of the limiting blocks (26) that is away from the rotary button (27) is rotated and engaged in the middle of the semi-circular limiting ring (292) and abuts against both ends of the limiting groove (291). The other limiting block (26) that is away from the rotary button (27) is slidably engaged in the middle of the sliding groove (293).

10. A vehicle towing hook device as described in claim 1, characterized in that, When the hook seat (3) is in the unfolded state, the two sides of one end of the hook seat (3) away from the hook body (31) are respectively engaged with the middle of the corresponding positioning slot (17), and the middle of one end of the hook seat (3) abuts against the bracket (28).

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