Pull type motor home with anti-unhooking structure

By using a fixed plate and clamping components to prevent the tow hook from loosening and detaching on bumpy roads, the problem of the tow hook coming loose on the trailer caravan is solved, ensuring a stable connection between the trailer caravan and the towing vehicle and avoiding traffic accidents and safety threats.

CN223778128UActive Publication Date: 2026-01-09ZHENGZHOU ELECTRIC POWER VOCATIONAL & TECH COLLEGE
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Patent Information

Application Number
CN202423294585.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-30
Publication Date
2026-01-09
Estimated Expiration
2034-12-30

AI Technical Summary

Technical Problem

During the journey, the trailer hitch may become loose or damaged due to bumpy roads, potentially causing it to detach unexpectedly and leading to traffic accidents that threaten the safety of vehicles and pedestrians.

Method used

The anti-detachment structure is adopted. Through the combination design of the fixing plate and the clamping part, it is ensured that the fixing plate slides on the support plate and is fixed by the clamping part, which enhances the connection stability between the towed caravan and the towing vehicle and prevents the trailer hook from loosening or detaching.

Benefits of technology

It effectively prevents the trailer hitch from loosening or detaching under vibration conditions, avoids loss of control of the RV, reduces traffic accidents, and ensures the safety of vehicles and pedestrians.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a pull type motor home with an anti-unhooking structure, and belongs to the technical field of motor home anti-unhooking. Comprising a touring car and a trailer chassis, anti-unhooking structures are arranged on the two sides of the trailer chassis, each anti-unhooking structure comprises a first fixing plate, a supporting plate is arranged below the first fixing plate and located on the trailer chassis, a second fixing plate is detachably arranged at the top of the supporting plate, and one end of the second fixing plate is connected with a tractor; the second fixing plate and the first fixing plate are connected through a pressing piece. According to the utility model, the fixing plate II and the fixing plate I are fixed, so that a guarantee is provided for the connection between the travel trailer and the tractor, and the vibration can not cause the looseness or damage of the connecting part of the tow hook and the accidental separation of the tow hook, so that the accidental separation of the tow hook from the tractor due to the out-of-control of the tow vehicle can be avoided; therefore, not only is the travel trailer ensured not to be damaged, but also the safety of other vehicles and pedestrians on the road is guaranteed.
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Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of trailer type motor home with anti-unhooking structure, belong to motor home anti-unhooking technical field. BACKGROUND

[0002] Trailer type motor home is a kind of motor home, and trailer type motor home is different from self-propelled motor home, and trailer type motor home itself has no power, and needs towing vehicle to be towed to travel. The rear bumper of the existing towing vehicle is generally provided with a towing hook, a towing ring and a fixed plate for towing at both ends of the rear bumper. The towing hook, the towing ring, the two fixed plates and the towing chassis are fixedly connected, so that the trailer type motor home can travel long distances.

[0003] When the trailer type motor home is traveling, it will be subjected to strong vibration due to road bumps when encountering uneven or rugged roads. Such vibration can cause the towing hook connection part to loosen or be damaged, which in turn causes the towing hook to accidentally detach, resulting in the motor home losing control and accidentally detaching from the towing vehicle, causing a traffic accident. This not only causes damage to the trailer motor home itself, but also poses a threat to other vehicles and pedestrians on the road. SUMMARY

[0004] The utility model solves the problem that the trailer type motor home is subjected to strong vibration due to road bumps when encountering uneven or rugged roads during travel. Such vibration can cause the towing hook connection part to loosen or be damaged, which in turn causes the towing hook to accidentally detach, resulting in the motor home losing control and accidentally detaching from the towing vehicle, causing a traffic accident. This not only causes damage to the trailer motor home itself, but also poses a threat to other vehicles and pedestrians on the road.

[0005] The utility model solves the problem by adopting the following technical solution: a trailer type motor home with an anti-unhooking structure, comprising a towing vehicle, a motor home and a towing chassis fixedly connected to the bottom of the motor home. The two sides of the end of the towing chassis connected to the towing vehicle are each fixed with an anti-unhooking structure. The anti-unhooking structure comprises a first fixed plate, which is integrally formed on the side wall of the towing chassis on one side. A support plate is fixed to the towing chassis below the first fixed plate. A second fixed plate is detachably mounted on the top of the support plate. The end of the second fixed plate away from the motor home is connected to the towing vehicle. The second fixed plate and the first fixed plate are connected by a compression member, which slides vertically.

[0006] By adopting the above technical scheme, in order to ensure that the trailer hook does not accidentally separate when the towing house car is running on uneven or rugged road, the anti-unhooking structure is used for further fixing, the driving towing vehicle is used to make the two ends of the second fixing plate installed on the top of the two support plates, then, under the support of the support plate on the second fixing plate, the compression member is moved in the vertical direction, so that the second fixing plate is connected with the first fixing plate, so that the second fixing plate is fixed on the support plate, and then the second fixing plate is fixed on the towing chassis, so that the towing vehicle and the towing chassis are fixed. Through the structure of the application, when the towing house car is running, the towing house car will be subjected to strong vibration due to the bumping of the road. By fixing the second fixing plate and the first fixing plate, the connection between the towing house car and the towing vehicle is ensured, so that the vibration does not cause the connection part of the trailer hook to be loose or damaged, and the trailer hook does not accidentally separate, so that the house car does not lose control and accidentally separates from the towing vehicle, and further traffic accidents are caused. This not only ensures that the towing house car itself does not be damaged, but also provides protection for the safety of other vehicles and pedestrians on the road.

[0007] The utility model further sets up: one side of support plate is integrally formed on the side wall of towing chassis, and the other side is integrally formed with slide rail for fixing plate two to slide, and slide rail and towing chassis form slide cavity.

[0008] By adopting the above technical scheme, when the towing vehicle and the towing chassis are connected, the towing vehicle only needs to be driven to be close to the towing chassis, so that the two sides of the second fixing plate are clamped into the slide rail and are installed on the top of the support plate by sliding along the slide cavity, so that the second fixing plate is connected with the towing chassis, and the towing vehicle is connected with the towing chassis.

[0009] The utility model further sets up: the compression member includes compression rod, and the first fixing plate is provided with a round hole one, and the second fixing plate is provided with a round hole two for the end of the compression rod to be clamped.

[0010] The two sides of the bottom end of the compression rod are integrally formed with protrusions, the two sides of the round hole two are provided with grooves for the protrusions to be clamped, and the inside of the round hole two is provided with an annular groove communicated with the grooves in the circumferential direction.

[0011] By adopting the above technical scheme, in the process of fixing the second fixed plate on the towing chassis, in the initial state, the compression rod passes through the round hole one and the protruding block one end is located between the first fixed plate and the second fixed plate. At this time, the staff rotates and presses the compression rod downward at the same time, so that the protruding block is aligned and clamped into the groove, when the protruding block moves to the communication position of the groove and the annular groove, the compression rod is rotated, so that the protruding block is clamped into the annular groove, the protruding block is limited by the annular groove, so that the compression rod cannot be separated from the round hole two, so that the second fixed plate is connected with the first fixed plate, and the second fixed plate is fixed on the supporting plate under the limiting action of the slide rail, so that the second fixed plate is stably fixed on the towing chassis.

[0012] The utility model further sets up: the elastic piece is set up between the first fixed plate and the second fixed plate on the compression rod, and the pressing plate for resisting the elastic piece is fixed at the position above the elastic piece on the compression rod, and the elastic piece is a spring in this embodiment.

[0013] By adopting the above technical scheme, in the process of connecting the first fixed plate and the second fixed plate, when the compression rod is clamped into the round hole two, the compression rod is pressed downward, so that the pressing plate moves downward, because one side of the spring is pressed by the pressing plate, and the other side abuts against the top of the second fixed plate, therefore, the spring generates upward elastic force after compression. When the protruding block is clamped into the annular groove, the external force of the compression rod is removed, so that the spring is no longer extruded by the pressing plate and restores to the original state, the spring releases a part of elastic force upward and drives the pressing plate to rise, at the same time, the compression rod rises, so that the protruding block rises in the annular groove, until the top surface of the protruding block abuts against the inner top surface of the annular groove, so that the connection between the compression rod and the second fixed plate is more stable, so that the connection between the first fixed plate and the second fixed plate is more stable, and the connection between the towing vehicle and the towing chassis is more stable.

[0014] The utility model further sets up: the compression cap is screw connected at the position above the first fixed plate on the compression rod.

[0015] By adopting the above technical scheme, in order to further improve the stability of the connection between the towing vehicle and the towing chassis, the staff can hold the rotating block with one hand to prevent the compression rod from rotating, then rotate the compression cap with the other hand, so that the compression cap rotates and approaches the top surface of the first fixed plate, until the bottom of the compression cap abuts against the top surface of the first fixed plate, then continue to rotate the compression cap, so that the compression cap presses the first fixed plate downward, so that the first fixed plate approaches the second fixed plate. At the same time, in the process of rotating the compression cap downward, the compression rod has a tendency to move upward, driving the protruding block to move upward, so that the protruding block abuts against the second fixed plate in the first fixed plate and moves upward, so that the second fixed plate approaches the first fixed plate, so that the connection between the first fixed plate and the second fixed plate is further stable, and the connection between the towing vehicle and the towing chassis is further stable.

[0016] The utility model further sets up: the trailer chassis is provided with fixed link on the trailer chassis, the fixed link is provided with the hook for connecting the trailer ring, the fixed link is provided with the rotating groove, the both sides of rotating groove are provided with connecting rod, the one end of hook is provided with the round hole for connecting rod, the opening of hook is provided with the limit structure, the limit structure includes the limit block, the hook is provided with fixed block, the fixed block is provided with the round stick, the both sides of limit block are rotatably connected in the both ends of round stick.

[0017] Among them, the tail side of the tractor is fixed with a trailer ring for hooking.

[0018] Through the above technical scheme, when the connection between the trailer chassis and the tractor needs to be strengthened, the opening of the hook is aligned and close to the trailer ring by rotating the hook, and then the limit block is rotated around the round stick towards the direction close to the hook, so as to open the opening of the hook, and then the trailer ring is clamped into the hook by rotating the hook. Then, the limit block is rotated around the round stick towards the direction away from the hook, so that one side of the limit block abuts against the sharp part of the hook, that is, the opening of the hook is closed.

[0019] The utility model has the advantages that: in order to ensure that the trailer hook does not accidentally separate when the trailer house car drives on uneven or rugged roads, the anti-unhooking structure is used for further fixing, the two fixed plates II are installed on the top of the two supporting plates by driving the tractor, then the fixed plate II is connected with the fixed plate I by moving the compression member in the vertical direction under the support of the supporting plate on the fixed plate II, so that the fixed plate II is fixed on the supporting plate, and then the fixed plate II is fixed on the trailer chassis, so that the tractor and the trailer chassis are fixed. When the trailer house car drives on uneven or rugged roads, the trailer house car will be subjected to strong vibration due to the road bumping. By fixing the fixed plate II and the fixed plate I, the connection between the trailer house car and the tractor is ensured, so that the vibration does not cause the trailer hook connection part to be loose or damaged, and the trailer hook does not accidentally separate, so that the trailer house car does not lose control and accidentally separates from the tractor, and further traffic accidents are avoided. This not only ensures that the trailer house car itself is not damaged, but also provides safety for other vehicles and pedestrians on the road. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the utility model;

[0021] Figure 2 It is a structural schematic view of the house car in the utility model;

[0022] Figure 3 It is a structural schematic view of the tractor in the utility model;

[0023] Figure 4 It is the schematic view of the anti-unhooking structure in the utility model;

[0024] Figure 5 It is the structural schematic view of the fixed rod and the hook in the utility model;

[0025] Figure 6 It is the structural schematic view of the compression rod in the utility model.

[0026] In the drawing: 1, towing vehicle; 2, motor home; 3, towing chassis; 4, fixed plate one; 5, support plate; 6, fixed plate two; 7, trailer hook; 8, trailer hole; 9, slide rail; 10, slide cavity; 11, compression rod; 12, round hole one; 13, round hole two; 14, protruding block; 15, recess; 16, annular groove; 17, elastic member; 18, pressing plate; 19, rotating block; 20, compression cap; 21, fixed rod; 22, hook; 23, rotating groove; 24, connecting rod; 25, round hole; 26, limiting clamping block; 27, fixed block; 28, round rod; 29, towing ring. DETAILED DESCRIPTION

[0027] In order to make the technical means, creation characteristics, purposes and effects of the utility model easy to understand, the following further describes the utility model in combination with specific drawings 1-6.

[0028] As Figures 1-3 shown, a towing type motor home with an anti-unhooking structure, comprising a towing vehicle 1, a motor home 2 and a towing chassis 3 fixedly connected to the bottom of the motor home 2, the towing chassis 3 is provided with an anti-unhooking structure on both sides of one end connected with the towing vehicle 1, the anti-unhooking structure comprises a fixed plate one 4, one side of the fixed plate one 4 is integrally formed on the side wall of the towing chassis 3, a support plate 5 is fixed on the towing chassis 3 below the fixed plate one 4, a fixed plate two 6 is detachably installed on the top of the support plate 5, one end of the fixed plate two 6 away from the motor home 2 is connected with the towing vehicle 1, the fixed plate two 6 and the fixed plate one 4 are connected through a compression member, and the compression member slides and fixes in the vertical direction.

[0029] Among them, the towing vehicle 1 is fixed with a trailer hook 7 at the tail side, and the towing chassis 3 is provided with a trailer hole 8 at one end for the trailer hook 7 to be clamped.

[0030] In order to ensure that the trailer hook 7 and the trailer hole 8 do not accidentally separate when the towing type house car 2 is running on uneven or rugged roads, the anti-unhooking structure is used for further fixing, the driving tractor 1 is driven to make the two ends of the fixed plate two 6 installed on the top of the two support plates 5, then, under the support of the support plate 5 to the fixed plate two 6, the compression part is moved in the vertical direction, so that the fixed plate two 6 is connected with the fixed plate one 4, so that the fixed plate two 6 is fixed on the support plate 5, and then the fixed plate two 6 is fixed on the towing chassis 3, so that the tractor 1 and the towing chassis 3 are fixed. Through the structure of the present application, when the towing type house car 2 encounters uneven or rugged roads during running, the towing type house car 2 will be subjected to strong vibration due to the bumping of the road. By fixing the fixed plate two 6 and the fixed plate one 4, a guarantee is provided for the connection between the towing type house car 2 and the tractor 1, so that such vibration will not cause the connection part of the trailer hook 7 to be loose or damaged, and will not cause the trailer hook 7 to accidentally separate, so that the house car 2 will not lose control and accidentally separate from the tractor 1, and will not cause a traffic accident, which not only ensures that the towing house car 2 itself will not be damaged, but also provides a guarantee for the safety of other vehicles and pedestrians on the road.

[0031] As shown in Figure 3 , one side of the support plate 5 is integrally formed on the side wall of the towing chassis 3, and the other side is integrally formed with a sliding rail 9 for sliding of the fixed plate two 6, and the sliding rail 9 and the towing chassis 3 form a sliding cavity 10.

[0032] When connecting the tractor 1 and the towing chassis 3, only the tractor 1 is driven to approach the towing chassis 3, so that the two sides of the fixed plate two 6 are clamped into the sliding rail 9 and slidably installed on the top of the support plate 5 along the sliding cavity 10, so that the fixed plate two 6 is connected with the towing chassis 3, and the tractor 1 is connected with the towing chassis 3.

[0033] As shown in Figure 2 , Figure 4 , and Figure 6 , the compression part includes a compression rod 11, a circular hole one 12 is formed through the fixed plate one 4, and a circular hole two 13 is formed on the fixed plate two 6 for clamping the end of the compression rod 11.

[0034] The bottom end of the compression rod 11 is integrally formed with a protrusion 14 on both sides, the circular hole two 13 is formed with a groove 15 on both sides for clamping the protrusion 14, and the circular hole two 13 is formed with an annular groove 16 in the circumferential direction inside the circular hole two 13.

[0035] In the process of fixing the second fixing plate 6 on the trailer chassis 3, initially, the pressing rod 11 passes through the round hole one 12 and the end of the protrusion 14 is between the first fixing plate 4 and the second fixing plate 6. At this time, the staff rotates and presses the pressing rod 11 downward, so that the protrusion 14 is aligned and clamped into the groove 15. When the protrusion 14 moves to the communication position of the groove 15 and the annular groove 16, the pressing rod 11 is rotated, so that the protrusion 14 is clamped into the annular groove 16. The protrusion 14 is limited by the annular groove 16, so that the pressing rod 11 cannot be separated from the round hole two 13. Thus, the second fixing plate 6 is connected with the first fixing plate 4, and the second fixing plate 6 is fixed on the support plate 5 under the limiting action of the slide rail 9. Thus, the second fixing plate 6 is stably fixed on the trailer chassis 3.

[0036] When the second fixing plate 6 needs to be removed, the protrusion 14 is rotated out of the annular groove 16 by rotating the pressing rod 11. When the protrusion 14 moves to the communication position of the groove 15 and the annular groove 16, the pressing rod 11 is pulled out of the groove 15, so that the end of the protrusion 14 is between the first fixing plate 4 and the second fixing plate 6. Thus, the connection between the second fixing plate 6 and the first fixing plate 4 is released, and the second fixing plate 6 can be removed from the support plate 5. The operation is very convenient.

[0037] As shown in FIG. 1, Figure 6 The elastic member 17 is sleeved on the pressing rod 11 between the first fixing plate 4 and the second fixing plate 6. The pressing plate 18 for abutting against the elastic member 17 is fixed on the pressing rod 11 above the elastic member 17. In this embodiment, the elastic member 17 is a spring.

[0038] In the process of connecting the first fixing plate 4 and the second fixing plate 6, when the pressing rod 11 is clamped into the round hole two 13, the pressing rod 11 is pressed downward, so that the pressing plate 18 moves downward. Since one side of the spring is pressed by the pressing plate 18 and the other side abuts against the top of the second fixing plate 6, the compressed spring generates upward elastic force. After the protrusion 14 is clamped into the annular groove 16, the external force pressing the pressing rod 11 is removed, so that the spring is no longer pressed by the pressing plate 18 and returns to the original state. The spring releases part of the upward elastic force to drive the pressing plate 18 to rise. At the same time, the pressing rod 11 rises, so that the protrusion 14 rises in the annular groove 16 until the top surface of the protrusion 14 abuts against the inner top surface of the annular groove 16. Thus, the connection between the pressing rod 11 and the second fixing plate 6 is more stable, so that the connection between the first fixing plate 4 and the second fixing plate 6 is more stable, and the connection between the towing vehicle 1 and the trailer chassis 3 is more stable.

[0039] When the connection between the fixed plate one 4 and the fixed plate two 6 is to be released, the compression rod 11 is only rotated, when the lug 14 is rotated to the position where the annular groove 16 is communicated with the groove 15, the spring continues to release another part of the elastic force upwardly, so that the pressing plate 18 moves upwardly, thereby the compression rod 11 moves upwardly, and then the lug 14 moves upwardly along the groove 15 until the lug 14 is separated from the fixed plate two 6 and moves to the position between the fixed plate one 4 and the fixed plate two 6, so that the compression rod 11 is separated from the fixed plate two 6, and the connection between the fixed plate one 4 and the fixed plate two 6 is released, which is convenient and efficient.

[0040] As shown in Figure 6 The top of the compression rod 11 is fixed with the rotating block 19 at the position above the pressing cap 20.

[0041] The rotating block 19 is arranged, so that the operation of the compression rod 11 by the worker is more convenient, and the flexibility of the compression rod 11 is improved.

[0042] As shown in Figure 6 The compression rod 11 is threadedly connected with the pressing cap 20 at the position above the fixed plate one 4.

[0043] In order to further improve the stability of the connection between the towing vehicle 1 and the trailer chassis 3, the worker can hold the rotating block 19 with one hand to prevent the compression rod 11 from rotating, and then rotate the pressing cap 20 with the other hand, so that the pressing cap 20 rotates while approaching the top surface of the fixed plate one 4, until the bottom of the pressing cap 20 abuts against the top surface of the fixed plate one 4, and then continue to rotate the pressing cap 20, so that the pressing cap 20 presses downwardly on the fixed plate one 4, and the fixed plate one 4 approaches the fixed plate two 6. At the same time, in the process of rotating the pressing cap 20 downwardly, the compression rod 11 has a tendency to move upwardly, and drives the lug 14 to move upwardly, so that the lug 14 abuts against the fixed plate two 6 in the fixed plate and moves upwardly, and the fixed plate two 6 approaches the fixed plate one 4, so that the connection between the fixed plate one 4 and the fixed plate two 6 is further stabilized, and the connection between the towing vehicle 1 and the trailer chassis 3 is further stabilized.

[0044] As shown in Figure 5 The trailer chassis 3 is provided with the fixed rod 21, the hook 22 for connecting the towing ring 29 is rotationally arranged on the fixed rod 21, the rotating groove 23 is formed in the fixed rod 21, the connecting rod 24 is arranged between the two sides of the rotating groove 23, the round hole 25 for the connecting rod 24 to pass through is formed in one end of the hook 22, the limiting structure is rotationally arranged at the opening of the hook 22, the limiting structure comprises the limiting block 26, the fixed block 27 is arranged on the hook 22, the round rod 28 is arranged on the fixed block 27, and the two sides of the limiting block 26 are rotationally connected to the two ends of the round rod 28.

[0045] The towing ring 29 for the hook 22 to be clamped into is fixed to the tail side of the towing vehicle 1.

[0046] In addition, the length of the limiting block 26 is greater than or equal to the width of the opening.

[0047] When it is necessary to strengthen the connection between the trailer chassis 3 and the towing vehicle 1, the hook 22 is only rotated so that the opening of the hook 22 is aligned and close to the trailer ring 29, then the limiting block 26 is rotated around the round rod 28 towards the direction close to the hook 22, so as to open the opening of the hook 22, and then the hook 22 is rotated again, so that the trailer ring 29 is clamped into the hook 22 by the opening. Then, the limiting block 26 is rotated around the round rod 28 towards the direction away from the hook 22, so that one side of the limiting block 26 abuts against the sharp part of the hook 22, that is, the opening of the hook 22 is closed.

[0048] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and various changes and improvements can be made without departing from the spirit and scope of the present application. These changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A trailerable housecar having an anti-unhooking structure, comprising a housecar (2) and a trailer chassis (3), characterized in that: Both sides of the trailer chassis (3) are provided with anti-unhooking structure, the anti-unhooking structure includes fixed plate one (4), the lower of fixed plate one (4) is located on the trailer chassis (3) and is provided with support plate (5), the top of support plate (5) is detachably provided with fixed plate two (6), one end of fixed plate two (6) is connected with tractor (1), fixed plate two (6) and fixed plate one (4) are connected through compression member, the compression member is arranged in vertical direction slidingly; The compression member includes compression rod (11), a circular hole one (12) is formed in the fixed plate one (4), a circular hole two (13) for the end of the compression rod (11) is clamped into is formed in the fixed plate two (6); Both sides of the compression rod (11) are provided with protruding block (14), both sides of the circular hole two (13) are provided with recess (15) for clamping protruding block (14), the circular hole two (13) is internally provided with annular groove (16) which is communicated with recess (15) along the circumferential direction; The compression rod (11) is provided with elastic member (17) which is sleeved between the fixed plate one (4) and the fixed plate two (6), the compression rod (11) is provided with pressing plate (18) which is used for abutting against elastic member (17) at the position above the elastic member (17); The compression rod (11) is threadedly connected with compression cap (20) at the position above the fixed plate one (4).

2. The travel trailer with an anti-unhooking structure according to claim 1, characterized in that: One side of the support plate (5) is arranged on the side wall of the trailer chassis (3), and the other side is provided with sliding rail (9) for sliding of the fixed plate two (6).

3. The travel trailer with an anti-unhooking structure according to claim 1, characterized in that: The trailer chassis (3) is provided with fixed rod (21), the fixed rod (21) is rotatably provided with hook (22) for connecting trailer ring (29), the opening of the hook (22) is rotatably provided with limiting structure.

4. The travel trailer with an anti-unhooking structure according to claim 3, characterized in that: The fixed rod (21) is provided with rotating groove (23), the connecting rod (24) is arranged between both sides of the rotating groove (23), one end of the hook (22) is provided with circular hole (25) for the connecting rod (24) to pass through.

5. The travel trailer as defined in claim 4, wherein: The limiting structure includes limiting block (26), the hook (22) is provided with fixed block (27), the fixed block (27) is provided with circular rod (28), both sides of the limiting block (26) are rotatably connected to both ends of the circular rod (28).