Flat-bed trailer

Abstract

A flat-bed trailer belongs to the technical field of semitrailers and is used for realizing the tilting function of a semitrailer frame so as to realize that a vehicle can be conveniently moved to the frame when the vehicle such as a motorcycle or a pickup truck is loaded. Comprising a frame, wheels, a traction frame, a pedal and a hydraulic oil cylinder, the frame comprises two groups of frame longitudinal beams, a frame cross beam and a frame panel, the two groups of frame longitudinal beams are positioned on two sides of the frame panel, and the frame cross beam is transversely arranged at the lower bottom of the frame panel; the wheels are arranged on the frame; the traction frame is arranged on the front side of the frame, and the rear end of the traction frame is hinged to a frame longitudinal beam of the frame. A traction frame cross beam is arranged on the traction frame, the front end of the hydraulic oil cylinder is hinged to the traction frame cross beam, and the rear end of the hydraulic oil cylinder is hinged to the frame cross beam; the pedal is arranged at the rear end of the frame, and the front end of the pedal is hinged to the rear end of the frame. By means of the arrangement, the vehicle frame can turn over with the tires as the axes, and meanwhile the hydraulic oil cylinder achieves the buffering function of turning over.

Description

Technical Field

[0001] The utility model belongs to the technical field of semi-trailers, and in particular relates to a flatbed trailer. Background Art

[0002] Flatbed trailers can tow all types of vehicles under 2.5 tons, including pickup trucks, SUVs, MPVs, and various motorcycles. Loading these vehicles onto the trailer typically requires the use of a ramp, which extends from the rear of the trailer to the ground, to facilitate pushing the vehicle onto the trailer. Due to the height difference between the trailer bed and the ground, if the ramp's angle is too steep, the weight of heavy equipment like motorcycles could cause excessive stress on the connection point between the ramp and the trailer bed, increasing the risk of damage. Therefore, to mitigate this risk, the ramp's length is increased to reduce its angle. Furthermore, given the weight of equipment like motorcycles and forklifts, the ramp could deform or break under these loads. Utility Model Content

[0003] In view of this, the present invention discloses a flatbed trailer, the specific scheme of which is as follows:

[0004] A flatbed trailer includes a frame, wheels, a traction frame, pedals, a hydraulic cylinder, a hydraulic station, a first tee pipe, a second tee pipe, a first oil pipeline, a second oil pipeline, a third oil pipeline, a fourth oil pipeline, a fifth oil pipeline, a sixth oil pipeline, a first valve, and a second valve;

[0005] The vehicle frame comprises a frame longitudinal beam, a frame cross beam, and a frame panel. The frame longitudinal beams are provided in two groups and are located on both sides of the frame panel. The frame cross beam is transversely arranged at the lower bottom of the frame panel.

[0006] The wheels are arranged on the frame;

[0007] The traction frame is arranged on the front side of the vehicle frame, and the rear end of the traction frame is hinged to the frame longitudinal beam of the vehicle frame; the traction frame cross beam is provided on the traction frame, the front end of the hydraulic oil cylinder is hinged to the traction frame cross beam, and the rear end of the hydraulic oil cylinder is hinged to the frame cross beam;

[0008] The pedal is arranged at the rear end of the frame, and the front end of the pedal is hinged to the rear end of the frame;

[0009] The hydraulic cylinder is provided with two groups, namely the first hydraulic cylinder and the second hydraulic cylinder, and the hydraulic station is provided on the traction frame;

[0010] The first pipe opening of the first tee pipe is connected to the lower opening of the first hydraulic cylinder through the first oil pipeline;

[0011] The second pipe opening of the first tee pipe is connected to the hydraulic station through a second oil pipeline, and the first valve is arranged on the second oil pipeline;

[0012] The third pipe opening of the first tee pipe is connected to the lower opening of the second hydraulic cylinder through the third oil pipeline;

[0013] The first pipe opening of the second tee pipe is connected to the upper opening of the second hydraulic cylinder through the fourth oil pipeline;

[0014] The second pipe opening of the second tee is connected to the hydraulic station through a fifth oil pipeline, and the second valve is provided on the fifth oil pipeline;

[0015] The third pipe opening of the second three-way pipe is connected to the upper opening of the first hydraulic cylinder through the sixth oil pipeline.

[0016] As a supplement to the technical solution of the present invention, a locking mechanism is also included, which includes a lock and a hook. The hook is arranged at the front end of the frame, the lock is arranged on the traction frame and the lock is located below the hook, and the lock is connected to the hook.

[0017] As a supplement to the technical solution of the present invention, the pedals are provided in two groups, namely a first pedal and a second pedal. The first pedal is arranged at the left part of the rear end of the frame, and the second pedal is arranged at the right part of the rear end of the frame.

[0018] As a supplement to the technical solution of the present invention, a winch system is also included. The winch system includes a fixed beam and a winch. One end of the fixed beam is fixed to the front end of the frame by bolts, and the other end of the fixed beam is provided with a winch.

[0019] As a supplement to the technical solution of the present invention, the winch system also includes a first reinforcing beam, one end of which is hinged to the middle position of the front end of the frame, and the other end of the first reinforcing beam is hinged to the middle of the fixed beam.

[0020] As a supplement to the technical solution of the present invention, the winch system also includes a second reinforcing beam, one end of which is hinged to the upper end of the frame, and the other end of which is hinged to the middle part of the fixed beam.

[0021] As a supplement to the technical solution of the present invention, a support plate is further included, which is arranged at the rear end of the frame and below the pedal.

[0022] Beneficial Effects: The flatbed trailer disclosed in the present invention can use a hydraulic cylinder to tilt the frame around the wheels. Furthermore, by configuring a hydraulic station, hydraulic cylinder, and oil pipeline, the cylinder can provide a buffer for frame tilting without requiring a power source. In another aspect of the present invention, a winch system can be provided to pull vehicles such as motorcycles and pickup trucks onto the trailer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model.

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the utility model.

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the utility model.

[0027] In the figure: 1. frame, 2. wheel, 3. traction frame, 4. pedal, 5. first hydraulic cylinder, 6. second hydraulic cylinder, 7. hydraulic station, 8. first tee, 9. second tee, 10. first oil pipeline, 11. second oil pipeline, 12. third oil pipeline, 13. fourth oil pipeline, 14. fifth oil pipeline, 15. sixth oil pipeline, 16. frame longitudinal beam, 17. frame cross beam, 18. frame panel, 19. fixed beam, 20. winch, 21. first reinforcement beam, 22. support plate, 23. second reinforcement beam, 24. lock, 25. hook. DETAILED DESCRIPTION

[0028] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0029] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0030] like Figures 1 to 4 As shown, a flatbed trailer includes a frame 1, wheels 2, a traction frame 3, pedals 4, and a hydraulic cylinder.

[0031] The vehicle frame 1 includes a frame longitudinal beam 16, a frame cross beam 17, and a frame panel 18. The frame longitudinal beam 16 is provided in two groups and is located on both sides of the frame panel 18. The frame cross beam 17 is transversely arranged at the bottom of the frame panel 18. The wheels 2 are provided on the vehicle frame 1, and there are two wheels 2, which are respectively located on the left and right sides of the vehicle frame 1.

[0032] The traction frame 3 is arranged on the front side of the vehicle frame 1 , and the rear end of the traction frame 3 is hinged to the frame longitudinal beam 16 of the vehicle frame 1 .

[0033] The traction frame 3 includes a transversely arranged traction frame 3 crossbeam, the front end of the hydraulic cylinder is hinged to the traction frame 3 crossbeam, and the rear end of the hydraulic cylinder is hinged to the frame crossbeam 17.

[0034] The pedal 4 is arranged at the rear end of the frame 1 , and the front end of the pedal 4 is hinged to the rear end of the frame 1 so that the pedal 4 can be flipped and arranged on the frame 1 .

[0035] The hydraulic oil cylinder can automatically control the extension or retraction of its piston rod through the pump group, and can accurately control the extension or retraction amplitude of the piston rod of the hydraulic oil cylinder.

[0036] In the above technical solution, it is necessary to cooperate with the power source of the pump group to realize the function of the hydraulic cylinder. In order to realize the function of the hydraulic cylinder without using the power source, the flatbed trailer also includes a hydraulic station 7, a first three-way pipe 8, a second three-way pipe 9, a first oil pipeline 10, a second oil pipeline 11, a third oil pipeline 12, a fourth oil pipeline 13, a fifth oil pipeline 14, a sixth oil pipeline 15, a first valve, a second valve

[0037] The hydraulic cylinders are provided in two groups, namely a first hydraulic cylinder 5 and a second hydraulic cylinder 6. The hydraulic station 7 is provided on the traction frame 3.

[0038] The first pipe opening of the first tee pipe 8 is connected to the lower opening of the first hydraulic cylinder 5 through the first oil pipeline 10;

[0039] The second pipe opening of the first three-way pipe 8 is connected to the hydraulic station 7 through the second oil pipeline 11, and the first valve is arranged on the second oil pipeline 11;

[0040] The third pipe opening of the first three-way pipe 8 is connected to the lower opening of the second hydraulic cylinder 6 through the third oil pipeline 12;

[0041] The first pipe opening of the second three-way pipe 9 is connected to the upper opening of the second hydraulic cylinder 6 through the fourth oil pipeline 13;

[0042] The second pipe opening of the second three-way pipe 9 is connected to the hydraulic station 7 through the fifth oil pipeline 14, and the second valve is provided on the fifth oil pipeline 14;

[0043] The third pipe opening of the second three-way pipe 9 is connected to the upper opening of the first hydraulic cylinder 5 through the sixth oil pipeline 15 .

[0044] Through the above-mentioned arrangement, when a motorcycle or pickup truck is transferred to a trailer via the pedal 4, the rear end of the frame 1 is lowered and the front end of the frame 1 is raised with the wheel 2 as the fulcrum. During this process, the frame 1 pulls the piston rods of the first hydraulic cylinder 5 and the second hydraulic cylinder 6 to extend, so that a negative pressure is formed in the working chambers of the first hydraulic cylinder 5 and the second hydraulic cylinder 6. The hydraulic oil in the hydraulic station 7 is transported to the first tee pipe 8 through the second oil pipeline 11, and then transported to the working chambers of the first hydraulic cylinder 5 and the third cylinder through the first oil pipeline 10 and the third oil pipeline 12 respectively. Due to the setting of the first valve, the flow rate of the hydraulic oil can be controlled, so that the piston rod of the cylinder is slowly extended, thereby achieving a buffering effect and preventing the piston rod from extending too quickly due to a large flow of hydraulic oil, resulting in failure of the cylinder buffering function.

[0045] As the body of a motorcycle or pickup truck is transferred to the trailer and continuously moves toward the front end of the frame 1, the front end of the frame 1 applies downward pressure on the piston rods of the first hydraulic cylinder 5 and the second hydraulic cylinder 6. During this process, the frame 1 pushes the piston rods of the first hydraulic cylinder 5 and the second hydraulic cylinder 6 to retract, so that a negative pressure is formed in the return oil chambers of the first hydraulic cylinder 5 and the second hydraulic cylinder 6. The hydraulic oil in the hydraulic station 7 is transported to the second three-way pipe 9 through the fifth oil pipeline 14, and then transported to the return oil chambers of the first hydraulic cylinder 5 and the third cylinder through the fourth oil pipeline 13 and the sixth oil pipeline 15 respectively. Due to the setting of the second valve, the flow rate of the hydraulic oil can be controlled, so that the piston rods of the cylinders retract slowly, thereby achieving a buffering effect and preventing the piston rods from retracting too quickly due to a large flow of hydraulic oil, resulting in failure of the cylinder buffering function.

[0046] At the same time, the design of the device can realize the raising and lowering functions of the frame 1 in conjunction with the deadweight of a vehicle such as a motorcycle without a power source.

[0047] As a preferred technical solution of the present invention, a locking mechanism is also included, which includes a lock buckle 24 and a hook 25. The hook 25 is arranged at the front end of the frame 1, and the lock buckle 24 is arranged on the traction frame 3 and the lock buckle 24 is located below the hook 25.

[0048] When the trailer is traveling, the lock catch 24 is hooked on the hook 25 to prevent the frame 1 from turning upward.

[0049] When a motorcycle, pickup truck, etc. needs to be loaded onto the trailer, the lock 24 is separated from the hook 25.

[0050] As a supplement to the above technical solution, two sets of running boards 4 are provided: a first set of running boards located on the left side of the rear end of the vehicle frame 1, and a second set of running boards located on the right side of the rear end of the vehicle frame 1. When the flatbed trailer is used to load motorcycles, the motorcycles can be pushed onto the trailer from the first and second running boards, respectively, allowing the trailer to carry two rows of motorcycles. For four-wheeled vehicles such as pickup trucks, the first and second running boards can be used to push the motorcycles onto the trailer using the tires on both sides.

[0051] As a preferred technical solution of the present invention, a winch system is also included. The winch system includes a fixed beam 19 and a winch 20. One end of the fixed beam 19 is fixed to the vehicle frame 1 by bolts, and the other end of the fixed beam 19 is provided with the winch 20. The winch system is installed at the left or right portion of the front end of the vehicle frame 1. The winch system can tow the motorcycle on the two sets of running boards 4 respectively, so that the direction of the force applied by the winch 20 to the motorcycle is the same as the direction of travel of the motorcycle.

[0052] The frame 1 further comprises a frame end beam, which is transversely arranged at the front end of the frame panel, and its two ends are respectively connected to the two sets of frame longitudinal beams. A fixed beam 19 is connected to the frame end beam.

[0053] As a supplement to the above technical solution, the winch system also includes a first reinforcing beam 21, one end of which is hinged to the middle of the front end of the vehicle frame 1, and the other end of which is hinged to the middle of the fixed beam 19. With this arrangement, when towing a four-wheeled vehicle, such as a pickup truck, the towing hook is located in the middle of the vehicle's front end. Because the winch system is located on the left and right sides of the front end of the vehicle frame 1, the force generated when towing the vehicle is split, which can easily cause the fixed beam 19 to bend under the force. The provision of the first reinforcing beam 21 improves the overall structural stability of the winch system.

[0054] As a supplement to the above technical solution, the winch system also includes a second reinforcement beam 23, one end of which is hinged to the upper end of the frame 1, and the other end of which is hinged to the middle of the fixed beam 19. When only the fixed beam 19 and the first reinforcement beam 21 are provided, only the front end of the frame 1 is subjected to force. To avoid the technical problem of excessive force on the front end of the frame 1 causing deformation, the second reinforcement beam 23 is provided. The second reinforcement beam 23 can transmit force to the upper end of the frame, thereby improving the overall structural stability.

[0055] As a supplement to the technical solution of the present invention, a support plate 22 is provided at the rear end of the frame 1, below the pedals 4. The support plate 22 is vertically arranged, with its ends connected to the two sets of frame longitudinal beams. When the rear end of the frame 1 descends, the support plate 22 contacts the ground, supporting the rear end of the frame 1 and preventing deformation caused by stress on the rear end of the frame 1.

[0056] The above is only a preferred specific implementation method of the present invention, but the scope of protection of the present invention is not limited to this. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the scope of protection of the present invention.

Claims

1. A flatbed trailer, characterized in that: It comprises a vehicle frame (1), wheels (2), a traction frame (3), pedals (4), a hydraulic cylinder, a hydraulic station (7), a first three-way pipe (8), a second three-way pipe (9), a first oil pipeline (10), a second oil pipeline (11), a third oil pipeline (12), a fourth oil pipeline (13), a fifth oil pipeline (14), a sixth oil pipeline (15), a first valve, and a second valve; The vehicle frame (1) comprises a frame longitudinal beam (16), a frame cross beam (17), and a frame panel (18); the frame longitudinal beam (16) is provided in two groups and is located on both sides of the frame panel (18); the frame cross beam (17) is transversely arranged at the lower bottom of the frame panel (18); The wheels (2) are arranged on the vehicle frame (1); The traction frame (3) is arranged on the front side of the vehicle frame (1), and the rear end of the traction frame (3) is hinged to the frame longitudinal beam (16) of the vehicle frame (1); a traction frame (3) cross beam is provided on the traction frame (3), the front end of the hydraulic oil cylinder is hinged to the traction frame (3) cross beam, and the rear end of the hydraulic oil cylinder is hinged to the frame cross beam (17); The pedal (4) is arranged at the rear end of the vehicle frame (1), and the front end of the pedal (4) is hinged to the rear end of the vehicle frame (1); The hydraulic cylinders are provided in two groups, namely a first hydraulic cylinder (5) and a second hydraulic cylinder (6), and the hydraulic station (7) is provided on the traction frame (3); The first pipe opening of the first three-way pipe (8) is connected to the lower opening of the first hydraulic cylinder (5) through the first oil delivery pipeline (10); The second pipe opening of the first three-way pipe (8) is connected to the hydraulic station (7) through a second oil pipeline (11), and the first valve is arranged on the second oil pipeline (11); The third pipe opening of the first three-way pipe (8) is connected to the lower opening of the second hydraulic cylinder (6) through the third oil pipeline (12); The first pipe opening of the second three-way pipe (9) is connected to the upper opening of the second hydraulic cylinder (6) through the fourth oil pipeline (13); The second pipe opening of the second three-way pipe (9) is connected to the hydraulic station (7) through a fifth oil pipeline (14), and the second valve is arranged on the fifth oil pipeline (14); The third pipe opening of the second three-way pipe (9) is communicated with the upper opening of the first hydraulic cylinder (5) through the sixth oil delivery pipeline (15).

2. A flatbed trailer according to claim 1, characterized in that: The vehicle also includes a locking mechanism, which includes a lock buckle (24) and a hook (25). The hook (25) is arranged at the front end of the vehicle frame (1). The lock buckle (24) is arranged on the traction frame (3) and the lock buckle (24) is located below the hook (25). The lock buckle (24) is connected to the hook (25).

3. A flatbed trailer according to claim 1, characterized in that: The pedals (4) are provided in two groups, namely a first pedal and a second pedal. The first pedal is provided at the left portion of the rear end of the vehicle frame (1), and the second pedal is provided at the right portion of the rear end of the vehicle frame (1).

4. A flatbed trailer according to claim 3, characterized in that: The vehicle also includes a winch system, which includes a fixed beam (19) and a winch (20). One end of the fixed beam (19) is fixed to the front end of the vehicle frame (1) by a bolt, and the other end of the fixed beam (19) is provided with the winch (20).

5. A flatbed trailer according to claim 4, characterized in that: The winch system further comprises a first reinforcing beam (21), one end of the first reinforcing beam (21) being hinged to the middle position of the front end of the vehicle frame (1), and the other end of the first reinforcing beam (21) being hinged to the middle of the fixed beam (19).

6. A flatbed trailer according to claim 4, characterized in that: The winch system further comprises a second reinforcing beam (23), one end of the second reinforcing beam (23) is hinged to the upper end of the vehicle frame (1), and the other end of the second reinforcing beam (23) is hinged to the middle of the fixed beam (19).

7. The flatbed trailer according to claim 1, characterized in that: The vehicle also includes a support plate (22), which is arranged at the rear end of the vehicle frame (1) and is located below the pedal (4).

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