A type of dump semi-trailer

Abstract

This utility model relates to the field of semi-trailer transportation technology, and more particularly to a self-dumping semi-trailer, including a cargo box body. A support frame is fixedly installed at the bottom of the cargo box body, and a driveable vertical tipping assembly is fixedly installed on one side of the support frame. The support frame includes a base frame, a lifting frame fixedly installed at both ends of one side of the base frame, a first hinge seat welded to the top of the lifting frame, one end of a supporting inclined frame fixedly installed to the top of the lifting frame, and the other end of the supporting inclined frame fixedly installed to the middle of the base frame. Second hinge seats are fixedly installed on both sides of the bottom of the tipping frame, and the second hinge seats are rotatably mounted to the first hinge seats. The telescopic end of the hydraulic cylinder is fixedly installed to a third hinge seat. This utility model forms a triangular structure with the supporting inclined frame, lifting frame, and base frame, effectively dispersing the impact force generated during unloading. The telescopic speed of the hydraulic cylinder is adjustable, allowing the operator to adjust the tipping angle and speed according to the type of cargo, optimizing the unloading effect.

Description

Technical Field

[0001] This utility model relates to the field of semi-trailer transportation, and in particular to a self-dumping semi-trailer. Background Technology

[0002] A semi-trailer is a heavy-duty transportation vehicle that is unpowered and shares the load with a tractor unit. It is usually connected to the tractor unit through a towing coupling device. It has advantages such as large carrying capacity and is suitable for transporting bulk and loose goods such as coal, ore, and building materials. To facilitate unloading, dump semi-trailers have emerged based on semi-trailers. Dump semi-trailers are composed of a frame, hydraulic cylinders, and a cargo box. The cargo box uses a side-tipping or rear-tipping self-unloading method. The frame and longitudinal beams of the cargo box are welded from high-quality manganese plates. The cargo box is available in two types: scoop and rectangular. It has advantages such as high strength, strong lifting capacity, good toughness, strong load-bearing capacity, and no permanent deformation.

[0003] A self-unloading semi-trailer, as disclosed in utility model patent application CN220996227U, includes a tractor unit, a box welded to the sidewall of the side panel, a ceramic tube fixedly installed between the inner walls of the box, a coil wound around the ceramic tube, a first metal sheet welded to one side of the coil, a metal tube fixedly installed between the inner walls of the box, a movable ring slidably fitted onto the metal tube, a connecting piece welded to the movable ring, a movable rod welded to the top side of the movable ring, a movable rod assembled in a groove, a connecting ring fixedly fitted onto the metal tube, a second metal sheet welded to the connecting ring, and by pushing an insulating block, the movable rod and movable ring slide, and the movable ring causes the connecting piece to slide on the coil. The change in coil length allows for adjustment of resistance. By adjusting the internal resistance of the motor, the unloading speed can be controlled, improving the adjustability of the device. This solution changes the resistance by pushing the insulating block to slide the connecting plate on the coil. However, this mechanical resistance adjustment method is prone to poor contact due to vibration, dust, and other factors in practical use. For example, vibrations generated during vehicle movement and unloading may loosen the contact between the connecting plate and the coil, affecting the stability of the resistance value. This, in turn, leads to unstable motor output power, fluctuating conveyor belt speed, and affecting the precise control of the unloading speed. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a self-unloading semi-trailer with adjustable hydraulic cylinder extension and retraction speed. Operators can adjust the tilting angle and speed according to the type of cargo to optimize the unloading effect.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a self-unloading semi-trailer, including a cargo box body, a mounting frame for support fixedly installed at the bottom of the cargo box body, a raised frame on one side, a first hinge seat, a support inclined frame and a tilting frame, the raised frame being fixedly installed at both ends of one side of the base frame, the first hinge seat being welded to the top of the raised frame, one end of the support inclined frame being fixedly installed to the top of the raised frame, the other end of the support inclined frame being fixedly installed to the middle of the base frame, a second hinge seat and a third hinge seat being fixedly installed on both sides of the bottom of the tilting frame, the second hinge seat being rotatably installed with the first hinge seat, and the vertical tilting assembly including a hydraulic cylinder, the telescopic end of the hydraulic cylinder being fixedly installed with the third hinge seat.

[0006] As a preferred technical solution of this utility model, the vertical flipping assembly further includes an oil tank, a hydraulic pump motor, an electromagnetic overflow valve, and an oil circuit pipe. The oil tank is fixedly installed on one side of the base frame, the hydraulic pump motor is fixedly installed on the upper surface of the oil tank, the oil cylinders are all installed through the hydraulic pump motor, the electromagnetic overflow valve is fixedly installed on the upper surface of the oil tank, and the electromagnetic overflow valve cross is located in the middle of the oil circuit pipe.

[0007] As a preferred embodiment of this utility model, an electrical box is fixedly installed on the side wall of the base frame, and the electrical box is connected to the hydraulic pump motor and the electromagnetic overflow valve wires.

[0008] As a preferred embodiment of this utility model, the second hinge seat and the third hinge seat are welded together with the tilting platform frame.

[0009] As a preferred technical solution of this utility model, the extension and retraction length of the hydraulic cylinder can be extended to allow the tilting frame to rotate 0-90 degrees.

[0010] Compared with the prior art, the beneficial effects that this utility model can achieve are: The triangular structure formed by the supporting inclined frame, lifting frame, and base frame effectively disperses the impact force generated during unloading, preventing deformation or breakage of the mounting frame and extending its service life. The synergistic action of the first, second, and third hinge seats ensures uniform force transmission when the cargo box is tilted, reducing local stress concentration and improving structural reliability. Compared with traditional rear or side tilting designs, vertical tilting can more quickly concentrate and unload goods to designated locations such as conveyor belts or stacking areas, reducing the scope of goods scattering and increasing unloading speed. The extension and retraction speed of the hydraulic cylinder is adjustable, allowing operators to adjust the tilting angle and speed according to the type of goods to optimize the unloading effect. The design of the lifting frame provides ample installation space for the hydraulic cylinder while avoiding interference with other vehicle components, making it suitable for semi-trailer chassis of different specifications. Attached Figure Description

[0011] Figure 1 This is a structural diagram of the present invention; Figure 2 This is the mounting bracket structure of the present utility model; Figure 3 This is a structural diagram of the vertical flipping component of this utility model; Figure 4 This is a structural diagram of the hydraulic cylinder of this utility model.

[0012] The components include: 1. Cargo box body; 2. Mounting frame; 21. Base frame; 22. Lifting frame; 23. First hinge seat; 24. Supporting inclined frame; 25. Tilting frame; 251. Second hinge seat; 252. Third hinge seat; 3. Vertical tilting assembly; 31. Oil tank; 32. Hydraulic pump motor; 33. Electromagnetic overflow valve; 34. Oil pipe; 35. Oil cylinder; 36. Electrical box. Detailed Implementation

[0013] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this utility model. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0014] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model provides a self-unloading semi-trailer, including a cargo box body 1, a mounting frame 2 for support is fixedly installed at the bottom of the cargo box body 1, and a vertically tilting component 3 that can be driven to tilt is fixedly installed on one side of the mounting frame 2. Mounting frame 2 includes a base frame 21, a lifting frame 22, a first hinge seat 23, a support inclined frame 24, and a tilting frame 25. The lifting frame 22 is fixedly installed at both ends of one side of the base frame 21. The first hinge seat 23 is welded to the top of the lifting frame 22. One end of the support inclined frame 24 is fixedly installed to the top of the lifting frame 22, and the other end of the support inclined frame 24 is fixedly installed to the middle of the base frame 21. The bottom sides of the tilting frame 25 are fixedly installed with a second hinge seat 251 and a third hinge seat 252. The second hinge seat 251 is rotatably installed with the first hinge seat 23. The vertical tilting assembly 3 includes a hydraulic cylinder 35. The telescopic end of the hydraulic cylinder 35 is fixedly installed with the third hinge seat 252.

[0015] In this case, the cargo box body 1, as the core load-bearing component, is used to load bulk goods such as coal, ore, and sand. Its structural design must meet the requirements of high strength and wear resistance, and it must also work in conjunction with the tipping assembly to achieve the unloading function. The base frame 21 of the mounting frame 2 serves as the base of the entire structure, directly connected to the semi-trailer frame, providing stable support and bearing the entire weight of the cargo box and cargo. The lifting frame 22 is fixed to both sides of the base frame 21, raising the bottom height of the cargo box to provide installation space for the vertical tipping assembly 3, such as the hydraulic cylinder 35, while optimizing the center of gravity distribution and improving driving stability. The first hinge seat 23 serves as the rotation fulcrum of the tipping platform 25, and connects with the second... The hinge seat 251 cooperates to realize the flipping action of the cargo box. The support slant frame 24 connects the middle of the lifting frame 22 and the base frame 21 to form a stable triangular structure, which enhances the overall rigidity of the mounting frame 2 and prevents deformation caused by uneven loading of goods during unloading. The tipping frame 25 is hinged to the first hinge seat 23 through the second hinge seat 251. The third hinge seat 252 is connected to the hydraulic cylinder 35 and is the direct execution component for flipping the cargo box. The hydraulic cylinder 35 of the vertical flipping component 3 serves as a power source and drives the tipping frame 25 to rotate around the first hinge seat 23 through telescopic movement, realizing the vertical flipping and unloading of the cargo box. Its telescopic end is fixed to the third hinge seat 252 to ensure accurate force transmission.

[0016] Workflow: The cargo box body 1 is in a horizontal position. The cargo is evenly filled into the cargo box by the loading equipment. The support frame 24 and the base frame 21 of the mounting frame 2 jointly bear the weight of the cargo, maintaining structural stability. The cargo box remains horizontal, the hydraulic cylinder 35 is in a retracted state, and the tipping frame 25 is parallel to the base frame 21. The weight of the cargo is transferred to the semi-trailer frame through the mounting frame 2, and the vehicle travels normally. During the unloading stage, the hydraulic cylinder 35 is activated, and the hydraulic cylinder 35 extends, pushing the third hinge seat 252 upward. The tipping frame 25 rotates around the first hinge seat 23, and the cargo box body 1 tilts synchronously with the tipping frame 25. When the hydraulic cylinder 35 extends to its maximum stroke, the tilt angle of the cargo box reaches the design value. The cargo slides down the bottom of the cargo box under the action of gravity, completing the unloading. After unloading, the cargo box is reset, the hydraulic cylinder 35 retracts, the tipping frame 25 rotates in the opposite direction to return to the horizontal position, and the cargo box returns to the transportation state.

[0017] Effects: The supporting inclined frame 24, the lifting frame 22, and the base frame 21 form a triangular structure, which effectively disperses the impact force generated during unloading, prevents the mounting frame 2 from deforming or breaking, and extends its service life. Through the synergistic action of the first hinge seat 23, the second hinge seat 251, and the third hinge seat 252, the force transmission is ensured to be uniform when the cargo box is tilted, reducing local stress concentration and improving structural reliability. Compared with the traditional rear tilting or side tilting design, vertical tilting can more quickly concentrate the cargo to a designated location such as a conveyor belt or stacking area, reduce the cargo scattering range, and increase the unloading speed. The extension and retraction speed of the hydraulic cylinder 35 is adjustable, and the operator can adjust the tilting angle and speed according to the type of cargo to optimize the unloading effect. The design of the lifting frame 22 provides ample installation space for the hydraulic cylinder 35 while avoiding interference with other parts of the vehicle, making it suitable for semi-trailer chassis of different specifications.

[0018] The vertical tilting assembly 3 also includes an oil tank 31, a hydraulic pump motor 32, an electromagnetic relief valve 33, and an oil pipe 34. The oil tank 31 is fixedly installed on one side of the base frame 21, the hydraulic pump motor 32 is fixedly installed on the upper surface of the oil tank 31, the oil cylinders 35 are all installed through the hydraulic pump motor 32, the electromagnetic relief valve 33 is fixedly installed on the upper surface of the oil tank 31, and the electromagnetic relief valve 33 is cross-shaped in the middle of the oil pipe 34.

[0019] In this case, the oil tank 31 serves as the oil storage container for the hydraulic system, providing clean hydraulic oil to the hydraulic pump motor 32. It also functions as a heat sink and a sedimentation point for impurities. Fixedly mounted on one side of the base frame 21, it forms an integral structure with the vehicle frame, reducing the impact of vibration on the hydraulic system. An internal filter or magnetic adsorption device can be installed to filter metal particles and impurities in the oil, extending the lifespan of hydraulic components. The hydraulic pump motor 32 converts mechanical energy into hydraulic energy, generating high-pressure oil flow through rotational motion, driving the extension and retraction of the cylinder 35. Fixed to the upper surface of the oil tank 31, its vertical installation reduces space occupation. An overload protection device is provided to prevent motor burnout due to oil circuit blockage or cylinder 35 jamming. The electromagnetic relief valve 33 serves as both a safety valve and a pressure regulating valve for the hydraulic system, automatically releasing pressure when the oil circuit pressure exceeds a set value. The system is opened to return excess oil to the oil tank 31, preventing damage from overpressure. Simultaneously, the oil circuit can be controlled via electromagnetic signals to remotely adjust the unloading speed. The oil pipes are installed in a cross pattern in the middle of the oil pipe 34 to ensure uniform oil flow. High-pressure resistant and corrosion-resistant sealing materials are used to adapt to harsh working conditions. The oil pipe 34 connects the hydraulic pump motor 32, the electromagnetic relief valve 33, and the oil cylinder 35, forming a closed hydraulic circuit to transmit high-pressure oil flow. The automatic pressure relief function of the electromagnetic relief valve 33 prevents the oil circuit pressure from exceeding the pressure resistance limit of the oil cylinder 35 or the oil pipe, avoiding pipe bursts, oil leaks, and other malfunctions. It is especially suitable for heavy-load or frequently start-stop conditions. Through the dynamic adjustment of the electromagnetic relief valve 33, the oil cylinder 35 is ensured to be subjected to uniform force during unloading, reducing cargo box vibration caused by pressure fluctuations and improving unloading stability.

[0020] An electrical box 36 is fixedly installed on the side wall of the base frame 21. The electrical box 36 is connected to the hydraulic pump motor 32 and the electromagnetic overflow valve 33 by wires.

[0021] In this case, the electrical box 36 has built-in circuit protection devices such as circuit breakers and fuses, which distribute the power from the vehicle power supply to the hydraulic pump motor 32 and the electromagnetic relief valve 33. At the same time, it prevents electrical fires or equipment damage caused by overload, short circuit and other faults. It adopts a waterproof and dustproof design to adapt to the harsh environment during transportation. The internal wiring layout is clear and the function of each circuit is marked, which facilitates maintenance and repair. The electrical box 36 provides an adjustable current to the electromagnetic coil of the electromagnetic relief valve 33 to control the valve core opening, thereby regulating the oil pressure and unloading speed. Through the pressure regulating module in the electrical box 36, the opening pressure threshold of the electromagnetic relief valve 33 is set. When the oil pressure exceeds the value, the valve core opens automatically and part of the oil flows back to the oil tank 31.

[0022] The second hinge seat 251 and the third hinge seat 252 are welded together with the tilting platform 25.

[0023] In this case, the second hinge seat 251 and the third hinge seat 252 are located on both sides of the tipping frame 25, with the third hinge seat 252 at the middle and the second hinge seat 251 at the rear. They are rigidly connected to the tipping frame 25 by welding. During the unloading process, the tipping frame 25 bears the bending moment and shear force generated by the weight of the cargo. The hinge seat, as a key stress point, transfers the load to the base frame 21 or other supporting structures. Compared with bolted connections, welding eliminates the connection gap, avoids stress concentration caused by loosening, and ensures the continuity and uniformity of load transfer. For example, under full load, the welded hinge seat can withstand a vertical load of more than 50 tons, while bolted connections may experience fretting wear due to insufficient preload.

[0024] Among them, the extension length of the hydraulic cylinder 35 can be extended to allow the tilting frame 25 to rotate 0-90 degrees.

[0025] In this case, the 0-degree tipping frame 25 is in its initial position, flush with the transport plane, facilitating stable fixation during cargo loading or transport. For example, in a mining dump semi-trailer, this position prevents ore from slipping during transport. The 90-degree tipping frame 25 is fully tilted to a vertical position, achieving complete unloading of the cargo. For example, in a construction waste transport vehicle, this position ensures that heavy objects such as concrete blocks and bricks are completely unloaded, avoiding residue. Intermediate angles, such as 30° and 60°, can be adjusted by the extension and retraction length of the hydraulic cylinder 35, allowing the tipping frame 25 to remain at any intermediate angle to adapt to different unloading needs. For example, when transporting grain, a 30° tilt can achieve slow unloading, preventing grain from splashing. When transporting chemical raw materials, a 60° tilt can ensure that materials with poor flowability are smoothly discharged.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A self-dumping semi-trailer, comprising a cargo box body (1), characterized in that: The bottom of the cargo box body (1) is fixedly installed with a mounting frame (2) for support, and a vertical flipping component (3) that can be driven to flip is fixedly installed on one side of the mounting frame (2). The mounting frame (2) includes a base frame (21), a lifting frame (22), a first hinge seat (23), a support inclined frame (24), and a flipping frame (25). The lifting frame (22) is fixedly installed at both ends of one side of the base frame (21). The first hinge seat (23) is welded to the top of the lifting frame (22). One end of the support inclined frame (24) is fixedly installed to the top of the lifting frame (22), and the other end of the support inclined frame (24) is fixedly installed to the middle of the base frame (21). The bottom sides of the flipping frame (25) are fixedly installed with a second hinge seat (251) and a third hinge seat (252). The second hinge seat (251) is rotatably installed with the first hinge seat (23). The vertical flipping assembly (3) includes a hydraulic cylinder (35). The telescopic end of the hydraulic cylinder (35) is fixedly installed with the third hinge seat (252).

2. The self-dumping semi-trailer according to claim 1, characterized in that: The vertical flipping assembly (3) also includes an oil tank (31), a hydraulic pump motor (32), an electromagnetic relief valve (33), and an oil pipe (34). The oil tank (31) is fixedly installed on one side of the base frame (21). The hydraulic pump motor (32) is fixedly installed on the upper surface of the oil tank (31). The oil cylinders (35) are all installed through the hydraulic pump motor (32). The electromagnetic relief valve (33) is fixedly installed on the upper surface of the oil tank (31). The electromagnetic relief valve (33) is cross-shaped in the middle of the oil pipe (34).

3. The self-dumping semi-trailer according to claim 1, characterized in that: An electrical box (36) is fixedly installed on the side wall of the base frame (21), and the electrical box (36) is connected to the hydraulic pump motor (32) and the electromagnetic overflow valve (33) by wires.

4. A self-dumping semi-trailer according to claim 1, characterized in that: The second hinge seat (251) and the third hinge seat (252) are welded together with the flip table frame (25).

5. A self-dumping semi-trailer according to claim 1, characterized in that: The extension length of the oil cylinder (35) can be extended to allow the tilting frame (25) to rotate 0-90 degrees.

Images