Dual wheel stowable trailer

Abstract

The utility model relates to a double -wheel storable trailer, including frame, be located the wheel turnover mechanism and damping mechanism in the bottom of frame, the frame includes girder and is located between two girders cross -pier, the wheel turnover mechanism includes reinforcing plate, support plate, two front connecting pieces, two rear connecting pieces and at least one shock absorber, and the outer end of two front connecting pieces is rotatively hinged on support plate and the inner end of two front connecting pieces is rotatively hinged on riser and forms the front parallelogram structure, and the outer end of two rear connecting pieces is rotatively hinged on support plate and the inner end of two rear connecting pieces is rotatively hinged on riser and forms the rear parallelogram structure. The utility model discloses a double -wheel storable trailer, when storing, the wheel is parallel with cross -pier by pulling the wheel, greatly reduces the land occupation of trailer, when unfolding, only need to pull the wheel reversely, it is very convenient and efficient, sets up shock absorber and can establish the buffer in the wheel and frame, makes the trailer operation more stable.

Description

Technical Field

[0001] This utility model relates to the field of cargo transportation machinery technology, and in particular to a two-wheeled retractable trailer. Background Technology

[0002] Airdropped vehicles are fixed to an airdrop platform, which is then slidably mounted on a transport aircraft. During the airdrop, the vehicle is dropped along with the platform. Since the width of the tracks inside the transport aircraft and the size of the airdrop platform are relatively fixed, and different supplies or vehicles vary in width, for smaller supplies or vehicles, such as the Warrior, there is still considerable space on both sides after the vehicle is placed on the airdrop platform. This space cannot be effectively utilized, resulting in a waste of transport aircraft capacity. Furthermore, during disaster relief and combat deployments, large amounts of supplies and equipment need to be carried, and while some vehicles are highly mobile and adaptable, their limited loading capacity makes it difficult to meet operational needs.

[0003] How to reduce the waste of transport aircraft capacity and how to increase vehicle loading capacity are urgent technical problems that need to be solved. Utility Model Content

[0004] The purpose of this invention is to provide a two-wheeled retractable trailer in order to solve the above-mentioned technical problems.

[0005] The technical solution adopted in this utility model is as follows: A two-wheeled retractable trailer includes a frame, a wheel tipping mechanism located at the bottom of the frame, and a shock-absorbing mechanism. The frame includes main beams extending in a front-to-back direction on both sides and a crossbeam between the two main beams. The bottom of the main beams is lower than the bottom of the crossbeam. The wheel tipping mechanism includes a reinforcing plate fixed to the inner side of the main beam at the bottom of the crossbeam, a fixed plate hinged to the bottom of the reinforcing plate via a hinge structure, and a vertical plate fixed to the lower surface of the fixed plate. The shock-absorbing mechanism includes a support plate fixedly connected to the wheel axle, two front connectors, two rear connectors, and at least one shock absorber whose outer end is rotatably hinged to the middle of the bottom of the support plate. The outer ends of the two front connectors are rotatably hinged to the support plate, and the inner ends of the two front connectors are rotatably hinged to the vertical plate to form a front parallelogram structure. The outer ends of the two rear connectors are rotatably hinged to the support plate, and the inner ends of the two rear connectors are rotatably hinged to the vertical plate to form a rear parallelogram structure. The inner end of the shock absorber is rotatably hinged to the top of the vertical plate.

[0006] Preferably, the hinge structure includes a first hinge plate fixed to the front and rear of the bottom of the reinforcing plate, a second hinge plate fixed to the front and rear of the upper surface of the fixing plate, and a first hinge shaft rotatably passing through the first hinge plate and the third hinge plate.

[0007] Preferably, each front connector includes two front connecting plates, and each rear connector includes two rear connecting plates.

[0008] Preferably, the support plate is a U-shaped plate, including a base plate and front and rear side plates integrally formed on the front and rear sides of the base plate, the outer ends of the two front connecting plates are hinged to the front side plates, and the two rear connecting plates are hinged to the rear side plates.

[0009] Preferably, two strip-shaped third hinge plates are fixed on the upright plate, and the inner ends of the front connecting plate and the rear connecting plate are hinged to the corresponding third hinge plates.

[0010] Preferably, there are two shock absorbers. The outer end of the shock absorber is hinged and fixed by a fourth hinge plate fixed to the bottom of the support plate, and the inner end of the shock absorber is hinged and fixed by a fifth hinge plate fixed to the top of the vertical plate.

[0011] Preferably, it also includes a locking mechanism, which is fixed to the main beam and locked in a locking connection with the fixing plate.

[0012] Preferably, the locking mechanism is a plug-in electromagnetic lock.

[0013] Preferably, the locking mechanism includes two end plates fixed to the bottom of the main beam, a spring cylinder fixed between the two end plates, a compression spring fixed in the spring cylinder, and a rod inserted into the compression spring and the end plates. The head of the rod is used to insert into the bottom of the fixed plate and the tail has a handle. A baffle is provided on the rod between the compression spring and the front end plate. The diameter of the baffle is larger than the diameter of the compression spring.

[0014] Preferably, the cross frame includes multiple crossbeams connecting the two main beams, and a hook-off locking mechanism is fixed on the crossbeam at the rear of the frame. The hook-off locking mechanism includes an upper locking plate, a lower locking plate, and side locking plates connecting the upper and lower locking plates. There is a gap between the upper and lower locking plates for a horizontal connecting ring or hook to be engaged. A pin through hole is provided at the opposite position of the upper and lower locking plates.

[0015] This utility model features a two-wheeled retractable trailer. When retracting, simply turn the wheels to align them parallel to the crossbar, significantly reducing the trailer's footprint. When unfolding, simply turn the wheels in the opposite direction, making it extremely convenient and efficient. It is suitable for scenarios such as transporting goods within factories and carrying combat equipment during rapid deployment via airdrop. For example, during airdrops, the trailer can be folded and secured to the sides of military vehicles like the Mengshi, utilizing the remaining space on the airdrop pallet to increase its utilization rate. After landing, the trailer can be quickly unfolded, equipment loaded, and the military vehicle tows the trailer for rapid deployment. The inclusion of shock absorbers creates a buffer between the wheels and the frame, resulting in smoother trailer operation. The two parallelogram structures formed by the hinged support plate, front connector, rear connector, and upright plate mutually constrain the shock absorbers, limiting the shock absorption amplitude and the lateral movement of the wheels, and preventing the wheels from swinging outwards or inwards during operation.

[0016] Furthermore, a locking mechanism is fixed at the bottom of the main beam. The head of the locking mechanism's rod is inserted below the fixing plate to prevent the fixing plate from detaching from the main beam in the vertical direction.

[0017] Furthermore, a hook-and-unhook locking mechanism is installed on the crossbeam at the rear of the chassis. The horizontal connecting ring of the trailer connecting frame can be inserted between the upper and lower plates, and then the pin can be inserted into the pin hole and the horizontal connecting ring and fixed. This allows multiple trailers to be connected together, making it convenient for a tractor to tow multiple trailers at once. Attached Figure Description

[0018] Figure 1 This is a bottom view of the structure of the two-wheeled retractable trailer in the embodiment of this utility model; Figure 2 This is a three-dimensional structural diagram of the two-wheeled retractable trailer in an embodiment of the present utility model; Figure 3 for Figure 1 Enlarged structural diagram at point A; Figure 4 for Figure 2 Enlarged structural diagram at point B; Figure 5 This is a schematic diagram of the locking mechanism; Figure 6 A schematic diagram of the connection structure between two retractable two-wheeled trailers; Figure 7 for Figure 6 A magnified structural diagram at point C.

[0019] To make it easier to read the image, Figure 2The image only shows the wheel and wheel tilting mechanism on one side of the bottom of the frame, including: 1. Frame; 2. Main beam; 3. Crossbeam; 4. Fixing plate; 5. Wheel; 6. Locking mechanism; 7. Vertical plate; 8. Reinforcing plate; 9. First hinge plate; 10. Rear connecting plate; 11. Support plate; 12. Second hinge plate; 13. Shock absorber; 14. Spring cylinder; 15. End plate; 16. Head; 17. Handle; 18. Third hinge plate; 19. Insert rod; 20. Front connecting plate; 21. Axle; 22. Unhooking locking mechanism; 23. Upper clamping plate; 24. Lower clamping plate; 25. Side clamping plate; 26. Pin through hole; 27. H-shaped reinforcing steel tube frame; 28. Pin; 29. ​​Connecting frame. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Examples of two-wheeled retractable trailers, such as Figure 1-5 As shown, the vehicle includes a frame 1, a wheel tilting mechanism, a shock absorption mechanism, and a locking mechanism 6 located at the bottom of the frame. The frame includes main beams 2 extending in the front-rear direction on both sides and a crossbeam 3 located between the two main beams. The wheel tilting mechanism includes a reinforcing plate 8 welded and fixed to the inner side of the main beam at the bottom of the crossbeam, a fixing plate 4 hinged to the bottom of the reinforcing plate via a hinge structure, and a vertical plate 7 welded and fixed to the lower surface of the fixing plate. The bottom of the main beam 2 is lower than the bottom of the crossbeam 3, so that the fixing plate can fit against the bottom of the main beam when the wheel tilting mechanism is tilted to the vertical position of the wheel. The shock absorption mechanism includes a mechanism fixed to the wheel axle 21. The system includes a support plate 11, two front connectors, two rear connectors, and at least one shock absorber 13 with its outer end rotatably hinged to the middle of the bottom of the support plate. In this embodiment, the shock absorber is a spring shock absorber, but in other embodiments, it can also be a hydraulic shock absorber. The outer ends of the two front connectors are rotatably hinged to the support plate 11, and the inner ends of the two front connectors are rotatably hinged to the upright plate 7 to form a front parallelogram structure. The outer ends of the two rear connectors are rotatably hinged to the support plate 11, and the inner ends of the two rear connectors are rotatably hinged to the upright plate 7 to form a rear parallelogram structure. The inner end of the shock absorber 13 is rotatably hinged to the top of the upright plate.

[0022] Specifically, the hinge structure includes a first hinge plate 9 welded and fixed to the front and rear sides of the bottom of the reinforcing plate 8, a second hinge plate 12 welded and fixed to the front and rear sides of the upper surface of the fixed plate 4, and a first hinge shaft (not shown in the figure) rotatably passing through the first and third hinge plates. Each front connector includes two front connecting plates 20, and each rear connector includes two rear connecting plates 10. The support plate is a U-shaped plate, including a bottom plate and front and rear side plates integrally formed on the front and rear sides of the bottom plate. The outer ends of the two front connecting plates 20 are hinged to the front side plates, and the outer ends of the two rear connecting plates 10 are hinged to the rear side plates. Two strip-shaped third hinge plates 18 are fixed on the upright plate. The inner ends of the front and rear connecting plates are hinged to the corresponding third hinge plates. The top of the strip-shaped third hinge plates is welded and fixed to the fixed plate, and the top of the third hinge plates is wider. In addition to being hinged to the front and rear connecting plates, the top of the third hinge plates also enhances the structural strength of the upright plate.

[0023] In this embodiment, there are two shock absorbers 13. The outer end of the shock absorber is hinged and fixed by a fourth hinge plate fixed to the bottom of the support plate 11, and the inner end of the shock absorber is hinged and fixed by a fifth hinge plate fixed to the top of the vertical plate. The locking mechanism 6 is fixed to the main beam and locked in place with the fixing plate.

[0024] The locking mechanism is existing technology; any mechanism that can securely and detachably lock the fixing plate to the beam is sufficient, with a plug-in type locking mechanism being preferred. Specifically, a plug-in type electromagnetic lock or other plug-in type locking mechanisms can be selected.

[0025] In this embodiment, the plug-in locking mechanism includes two end plates 15 fixed to the bottom of the main beam, a spring cylinder 14 fixed between the two end plates, a compression spring (not shown in the figure) fixed in the spring cylinder, and a plug-in rod 19 inserted into the compression spring and the end plates. The head 16 of the plug-in rod is used to insert into the bottom of the fixed plate and the tail has a handle 17. A baffle (not shown in the figure) is provided on the plug-in rod between the compression spring and the front end plate. The diameter of the baffle is larger than the diameter of the compression spring.

[0026] In this embodiment, the crossbeam includes multiple crossbeams connecting the two main beams. A hook-and-lock mechanism 22 is fixedly installed on the crossbeam at the rear of the frame. The hook-and-lock mechanism includes an upper locking plate 23, a lower locking plate 24, and side locking plates 25 connecting the upper and lower locking plates. There is a gap between the upper and lower locking plates for a horizontal connecting ring or hook to engage. A pin through hole 26 is provided at the opposite position of the upper and lower locking plates. Specifically, in this embodiment, the crossbeam at the rear of the frame is broken in the middle. The crossbeam at the rear of the frame is fixedly connected to the adjacent crossbeam through an H-shaped reinforcing steel tube frame 27. The hook-and-lock mechanism 22 is embedded and welded to the crossbeam at the rear of the frame and the H-shaped reinforcing steel tube frame.

[0027] The trailer's main beam has a front-mounted hinged connecting frame 29. This frame includes a front A-frame, with a crossbar extending forward from the A-frame. A horizontal connecting ring is fixed to the front end of the A-frame for connection to the rear of the trailer. A hook-locking mechanism is fixed to the crossbar at the rear of the frame. This mechanism allows the horizontal connecting ring of the trailer connecting frame to be inserted between upper and lower locking plates. Then, a pin 28 is inserted into the pin hole 26 and the horizontal connecting ring and secured. This allows multiple trailers to be connected together, facilitating the towing of multiple trailers by a single tractor.

[0028] This embodiment of the dual-wheel retractable trailer allows for easy and efficient storage. When retracting, unlocking the locking mechanism 6 and maneuvering the wheels 5 parallel the wheels to the crossbar significantly reduces the trailer's footprint. Unfolding is as simple as maneuvering the wheels in the opposite direction, making it highly convenient and efficient. It is suitable for scenarios such as transporting goods within factories and carrying combat equipment during rapid deployment via airdrop. For example, during airdrops, the trailer can be folded and secured to the sides of military vehicles like the Mengshi, utilizing the remaining space on the airdrop pallet to increase its utilization rate. After landing, the trailer can be quickly unfolded, equipment loaded, and the military vehicle tows the trailer for rapid deployment. The inclusion of shock absorbers creates a buffer between the wheels and the frame, resulting in smoother trailer operation. The two parallelogram structures formed by the hinged support plate, front connector, rear connector, and upright plate mutually constrain the shock absorbers, limiting the shock absorption amplitude and the lateral movement of the wheels, and preventing outward or inward wheel swaying during operation. A locking mechanism is also fixed at the bottom of the main beam. The head of the locking mechanism's rod is inserted below the fixing plate to prevent the fixing plate from separating from the main beam in the vertical direction.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A two-wheeled retractable trailer, characterized in that: The vehicle includes a frame, a wheel tilting mechanism located at the bottom of the frame, and a shock absorption mechanism. The frame includes main beams extending in the front-rear direction on both sides and a crossbeam between the two main beams. The bottom of the main beams is lower than the bottom of the crossbeam. The wheel tilting mechanism includes a reinforcing plate fixed to the inner side of the main beam at the bottom of the crossbeam, a fixed plate hinged to the bottom of the reinforcing plate via a hinge structure, and a vertical plate fixed to the lower surface of the fixed plate. The shock absorption mechanism includes a support plate fixedly connected to the wheel axle, two front connectors, two rear connectors, and at least one shock absorber whose outer ends are rotatably hinged to the middle of the bottom of the support plate. The outer ends of the two front connectors are rotatably hinged to the support plate, and the inner ends of the two front connectors are rotatably hinged to the vertical plate to form a front parallelogram structure. The outer ends of the two rear connectors are rotatably hinged to the support plate, and the inner ends of the two rear connectors are rotatably hinged to the vertical plate to form a rear parallelogram structure. The inner end of the shock absorber is rotatably hinged to the top of the vertical plate.

2. The two-wheeled retractable trailer according to claim 1, characterized in that: The hinge structure includes a first hinge plate fixed to the front and rear of the bottom of the reinforcing plate, a second hinge plate fixed to the front and rear of the upper surface of the fixing plate, and a first hinge shaft rotatably passing through the first hinge plate and the third hinge plate.

3. The two-wheeled retractable trailer according to claim 1, characterized in that: Each front connector includes two front connecting plates, and each rear connector includes two rear connecting plates.

4. The two-wheeled retractable trailer according to claim 3, characterized in that: The support plate is a U-shaped plate, including a base plate and front and rear side plates integrally formed on the front and rear sides of the base plate. The outer ends of the two front connecting plates are hinged to the front side plates, and the two rear connecting plates are hinged to the rear side plates.

5. The two-wheeled retractable trailer according to claim 4, characterized in that: Two strip-shaped third hinge plates are fixed on the upright plate, and the inner ends of the front connecting plate and the rear connecting plate are hinged to the corresponding third hinge plates.

6. The two-wheeled retractable trailer according to claim 1, characterized in that: There are two shock absorbers. The outer end of the shock absorber is hinged and fixed by a fourth hinge plate fixed to the bottom of the support plate, and the inner end of the shock absorber is hinged and fixed by a fifth hinge plate fixed to the top of the vertical plate.

7. The two-wheeled retractable trailer according to claim 1, characterized in that: It also includes a locking mechanism, which is fixed to the main beam and locked in place with the fixing plate.

8. The two-wheeled retractable trailer according to claim 7, characterized in that: The locking mechanism is a plug-in type electromagnetic lock.

9. The two-wheeled retractable trailer according to claim 7, characterized in that: The locking mechanism includes two end plates fixed to the bottom of the main beam, a spring cylinder fixed between the two end plates, a compression spring fixed in the spring cylinder, and a rod inserted into the compression spring and the end plates. The head of the rod is used to insert into the bottom of the fixed plate and the tail has a handle. A baffle is provided on the rod between the compression spring and the front end plate. The diameter of the baffle is larger than the diameter of the compression spring.

10. The two-wheeled retractable trailer according to any one of claims 1-9, characterized in that: The cross frame includes multiple crossbeams connecting the two main beams. A hook-and-lock mechanism is fixed on the crossbeam at the rear of the frame. The hook-and-lock mechanism includes an upper locking plate, a lower locking plate, and side locking plates connecting the upper and lower locking plates. There is a gap between the upper and lower locking plates for a horizontal connecting ring or hook to be engaged. A pin through hole is provided at the opposite position of the upper and lower locking plates.

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