A semi-trailer frame with large carrying capacity

Abstract

The utility model provides a kind of semi-trailer frame of large bearing capacity, including two longitudinal beams and several cross beams, the front end of longitudinal beam is fixedly connected with pulling assembly, the bottom surface of longitudinal beam is fixedly connected with reinforcing box.The utility model has the advantages that: reinforcing box is arranged at the bottom of longitudinal beam, reinforcing box can effectively improve the rigidity of longitudinal beam, so that it can bear greater load, and the overall strength of the frame is higher.When unloading, start the drive motor, and the drive motor drives the moving seat to move horizontally, and then the drive cylinder and the auxiliary wheel can be driven to move horizontally, and the horizontal position of the auxiliary wheel can be adjusted.Start the drive cylinder, and the drive cylinder is elongated, so that the auxiliary wheel contacts the ground, forming support for the moving seat, and the moving seat transmits the support force to the reinforcing box and the longitudinal beam, resisting the load of goods.The support position of the longitudinal beam can be adjusted according to the actual load, so that the longitudinal beam is instantly reinforced, and the use is more flexible, and the bearing capacity is stronger.

Description

Technical Field

[0001] This utility model relates to the field of semi-trailer frame technology, and in particular to a semi-trailer frame with high load-bearing capacity. Background Technology

[0002] Semi-trailers are typically used to transport heavy-duty trucks, rail vehicles, construction machinery, forestry machinery, and other heavy-duty goods, which are characterized by their large size and difficulty in disassembling and unpacking. The lower the center of gravity of a semi-trailer, the better its stability and safety, and the stronger its ability to pass over overhead obstacles during transport. The greater the rigidity of its frame, the greater its resistance to deformation after loading cargo, and the safer it is during transport.

[0003] Existing low-bed semi-trailers experience frame deformation under stress after loading, especially when the load is concentrated, leading to more severe deformation. When the pressure on the main frame is applied to the semi-trailer tires, the front axle tires, closest to the load, experience the greatest stress, while the rear axle tires, furthest from the load, experience no stress, causing the semi-trailer to warp, specifically resulting in the rear axle tires being suspended in the air. Due to the greatest stress, the front axle tires wear more severely, requiring more frequent tire replacements than the other two axles, increasing operating costs. Furthermore, the uneven wear caused by the difference in stress between the front and rear tires leads to frequent tire blowouts. Therefore, this paper proposes an improved semi-trailer frame with a higher load-bearing capacity. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to propose a semi-trailer frame with high load-bearing capacity to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0006] To achieve the above objectives, one embodiment of this utility model provides a high-load-bearing capacity semi-trailer frame, comprising two longitudinal beams and several transverse beams. A traction assembly is fixedly connected to the front end of each longitudinal beam, and a reinforcing box is fixedly connected to the bottom surface of each longitudinal beam. A drive shaft is rotatably connected inside the reinforcing box, and a drive motor is provided at one end of the drive shaft. A movable seat is threadedly connected to the drive shaft. A support plate is fixedly connected to the inner side of the reinforcing box, and a connecting column is fixedly connected to the bottom surface of the movable seat. A drive cylinder is fixedly connected to the bottom surface of the connecting column, and an mounting plate is fixedly connected to the piston rod end of the drive cylinder. An auxiliary wheel is provided on the mounting plate.

[0007] Preferably, in any of the above schemes, the plurality of crossbeams are evenly arranged along the length of the longitudinal beams, and the tensioning assembly includes a plurality of transverse tie rods disposed between two longitudinal beams and a connecting plate disposed between the transverse tie rods.

[0008] The above technical solution employs longitudinal beams and crossbeams to form the main body of the chassis. Crossbeams connect two longitudinal beams and assist the longitudinal beams in bearing the upper load. Several crossbeams are evenly distributed, resulting in a more balanced overall strength of the chassis. A traction assembly is installed at the front end of the longitudinal beams to facilitate the connection between the chassis and the tractor unit.

[0009] Preferably, in any of the above embodiments, the reinforcing box is disposed at the front end of the longitudinal beam, and several reinforcing ribs are fixedly connected to the longitudinal beam.

[0010] The above technical solution involves installing a reinforcing box at the bottom of the longitudinal beam. This box effectively increases the rigidity of the longitudinal beam, enabling it to withstand greater loads and resulting in higher overall frame strength. Simultaneously, the reinforcing box provides installation space for the drive axle and movement space for the sliding seat. The reinforcing box is located at the front end of the longitudinal beam, reinforcing the front end to withstand the load concentrated at the front of the frame during unloading. Reinforcing ribs are also installed on the longitudinal beam to further increase its strength.

[0011] Preferably, in any of the above embodiments, the drive motor is located on the outside of the reinforcing box, and a protective box is provided on the outside of the drive motor.

[0012] The above technical solution involves starting the drive motor, which in turn moves the moving base horizontally, thereby moving the drive cylinder and auxiliary wheel horizontally and adjusting the horizontal position of the auxiliary wheel. A protective box is installed outside the drive motor to protect it from external impacts.

[0013] Preferably, in any of the above embodiments, a guide rod is fixedly connected inside the reinforcing box, and the movable seat is sleeved on the guide rod.

[0014] The above technical solution involves setting a guide rod inside the reinforcing box. The guide rod can constrain and guide the movable seat fitted on it, preventing it from displacing in other directions and also preventing it from rotating with the drive shaft, thus making the movement of the movable seat smoother.

[0015] Preferably, the top and bottom surfaces of the movable seat are provided with a number of ball bearings, and the tray is provided with two rows in each reinforcing box and symmetrically arranged on both sides of the connecting column.

[0016] The above technical solution involves installing ball bearings on both the top and bottom surfaces of the movable seat. These ball bearings effectively reduce the friction between the movable seat and the reinforcing box, resulting in smoother movement of the movable seat. A support plate supports the movable seat, bearing the weight load of the movable seat and its superstructure, thus reducing the working pressure on the drive shaft.

[0017] Preferably, the auxiliary wheel is a swivel wheel, as described in any of the above schemes.

[0018] The above technical solution involves the following steps: During unloading, the drive motor rotates the drive shaft as needed to adjust the position of the movable seat. Then, the drive cylinder is activated, extending to bring the auxiliary wheels into contact with the ground, providing support for the movable seat. The movable seat then transfers the supporting force to the reinforcing box and longitudinal beams to resist the cargo load. The auxiliary wheels are swivel casters, allowing for smoother and freer rotation.

[0019] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0020] 1. This high-load-bearing semi-trailer frame, through the inclusion of reinforcing boxes, drive shafts, drive motors, pallets, connecting columns, drive cylinders, mounting plates, and auxiliary wheels, effectively increases the rigidity of the longitudinal beams by incorporating reinforcing boxes. This allows the frame to withstand greater loads and enhances overall frame strength. During unloading, the drive motor is activated as needed, causing the moving seat to shift horizontally. This, in turn, shifts the drive cylinder and auxiliary wheels horizontally, adjusting their level. Activating the drive cylinder extends it, bringing the auxiliary wheels into contact with the ground and supporting the moving seat. The moving seat then transfers the supporting force to the reinforcing boxes and longitudinal beams, resisting the cargo load. The support position for the longitudinal beams can be adjusted according to the actual load conditions, providing immediate reinforcement and enhancing flexibility and load-bearing capacity.

[0021] 2. This high-load-bearing semi-trailer frame features reinforcing ribs on the longitudinal beams, increasing their strength. Guide rods are installed within the reinforcing box to constrain and guide the movable seat, preventing displacement in other directions and avoiding rotation along with the drive shaft, thus ensuring smoother movement. Ball bearings are installed on both the top and bottom surfaces of the movable seat, effectively reducing friction between the seat and the reinforcing box, further enhancing smooth movement.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a first-view structural diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the second-view structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the transverse cross-section structure of this utility model;

[0027] Figure 4 This is a schematic diagram of the longitudinal section structure of the reinforcing box of this utility model.

[0028] In the diagram: 1-Longitudinal beam, 2-Crossbeam, 3-Tension assembly, 4-Reinforcing box, 5-Drive shaft, 6-Moving seat, 7-Panel, 8-Connecting column, 9-Drive cylinder, 10-Mounting plate, 11-Auxiliary wheel, 12-Drive motor. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] like Figures 1-4 As shown, this utility model includes two longitudinal beams 1 and several transverse beams 2. A traction assembly 3 is fixedly connected to the front end of the longitudinal beam 1. A reinforcing box 4 is fixedly connected to the bottom surface of the longitudinal beam 1. A drive shaft 5 is rotatably connected inside the reinforcing box 4. A drive motor 12 is provided at one end of the drive shaft 5. A movable seat 6 is threadedly connected to the drive shaft 5. A support plate 7 is fixedly connected to the inner side of the reinforcing box 4. A connecting column 8 is fixedly connected to the bottom surface of the movable seat 6. A drive cylinder 9 is fixedly connected to the bottom surface of the connecting column 8. An mounting plate 10 is fixedly connected to the piston rod end of the drive cylinder 9. An auxiliary wheel 11 is provided on the mounting plate 10.

[0032] Example 1: Several crossbeams 2 are evenly arranged along the length of the longitudinal beam 1. The traction assembly 3 includes several transverse tie rods disposed between two longitudinal beams 1 and connecting plates disposed between the transverse tie rods. The longitudinal beams 1 and crossbeams 2 cooperate to form the main body of the frame. The crossbeams 2 connect the two longitudinal beams 1 together and assist the longitudinal beams 1 in bearing the upper load. The even arrangement of several crossbeams 2 makes the overall strength of the frame more balanced. The traction assembly 3 is set at the front end of the longitudinal beam 1 to provide conditions for the connection between the frame and the tractor. The reinforcing box 4 is set at the front end of the longitudinal beam 1, and several reinforcing ribs are fixedly connected to the longitudinal beam 1. The reinforcing box 4 is set at the bottom of the longitudinal beam 1. The reinforcing box 4 can effectively improve the rigidity of the longitudinal beam 1, enabling it to bear a larger load and making the overall strength of the frame higher. At the same time, the reinforcing box 4 provides installation space for the drive shaft 5 and provides movement space for the movable seat 6. The reinforcing box 4 is set at the front end of the longitudinal beam 1 to reinforce the front end of the longitudinal beam 1 so that it can resist the load concentrated at the front end of the frame during unloading. Reinforcing ribs are installed on longitudinal beam 1 to increase its strength.

[0033] Example 2: The drive motor 12 is located on the outside of the reinforcing box 4, and a protective box is provided on the outside of the drive motor 12. When the drive motor 12 is started, it drives the movable seat 6 to move horizontally, which in turn drives the drive cylinder 9 and the auxiliary wheel 11 to move horizontally, adjusting the horizontal position of the auxiliary wheel 11. The protective box on the outside of the drive motor 12 provides protection against external forces. A guide rod is fixedly connected inside the reinforcing box 4, and the movable seat 6 is sleeved on the guide rod. The guide rod inside the reinforcing box 4 can constrain and guide the movable seat 6, preventing it from moving in other directions and preventing it from rotating with the drive shaft 5, making the movement of the movable seat 6 smoother.

[0034] Example 3: The top and bottom surfaces of the movable seat 6 are equipped with several ball bearings. Two support plates 7 are symmetrically arranged on both sides of the connecting column 8 within each reinforcing box 4. The ball bearings on both the top and bottom surfaces of the movable seat 6 effectively reduce the friction between the movable seat 6 and the reinforcing box 4, making the movement of the movable seat 6 smoother. The support plates 7 support the movable seat 6, bearing the weight of the movable seat 6 and its upper structure, reducing the working pressure on the drive shaft 5. The auxiliary wheels 11 are omnidirectional wheels. During unloading, the drive motor 12 is used to rotate the drive shaft 5 as needed to adjust the position of the movable seat 6. Subsequently, the drive cylinder 9 is activated, extending it so that the auxiliary wheels 11 contact the ground, providing support for the movable seat 6. The movable seat 6 transmits the supporting force to the reinforcing box 4 and the longitudinal beam 1 to resist the load of the goods. The auxiliary wheels 11 are omnidirectional wheels, allowing for smoother and freer rotation.

[0035] The working principle of this utility model is as follows:

[0036] S1. A reinforcing box 4 is installed at the bottom of the longitudinal beam 1. The reinforcing box 4 can effectively improve the rigidity of the longitudinal beam 1, enabling it to bear a greater load and making the overall strength of the frame higher.

[0037] S2. When unloading, the drive motor 12 is started as needed. The drive motor 12 drives the moving seat 6 to move horizontally, which in turn drives the drive cylinder 9 and the auxiliary wheel 11 to move horizontally, and adjusts the horizontal position of the auxiliary wheel 11.

[0038] S3. Start the drive cylinder 9 to extend the drive cylinder 9 and make the auxiliary wheel 11 contact the ground to form a support for the moving seat 6. The moving seat 6 transmits the support force to the reinforcing box 4 and the longitudinal beam 1 to resist the load of the goods.

[0039] Compared with the prior art, the present invention has the following advantages:

[0040] 1. This high-load-bearing semi-trailer frame incorporates a reinforcing box 4, drive shaft 5, drive motor 12, pallet 7, connecting column 8, drive cylinder 9, mounting plate 10, and auxiliary wheels 11. The reinforcing box 4, located at the bottom of the longitudinal beam 1, effectively increases the rigidity of the longitudinal beam 1, enabling it to withstand greater loads and resulting in higher overall frame strength. During unloading, the drive motor 12 is activated as needed, causing the moving seat 6 to move horizontally. This, in turn, moves the drive cylinder 9 and auxiliary wheels 11 horizontally, adjusting their horizontal position. Activating the drive cylinder 9 extends it, bringing the auxiliary wheels 11 into contact with the ground, supporting the moving seat 6. The moving seat 6 then transfers the supporting force to the reinforcing box 4 and longitudinal beam 1, resisting the cargo load. The support position on the longitudinal beam 1 can be adjusted according to the actual load, providing immediate reinforcement and enhancing its flexibility and load-bearing capacity.

[0041] 2. The semi-trailer frame with high load-bearing capacity features reinforcing ribs on the longitudinal beams 1, increasing their strength. Guide rods are installed inside the reinforcing box 4 to constrain and guide the movable seat 6 fitted onto it, preventing displacement in other directions and avoiding rotation along with the drive shaft 5, thus ensuring smoother movement of the movable seat 6. Ball bearings are installed on both the top and bottom surfaces of the movable seat 6, effectively reducing friction between the movable seat 6 and the reinforcing box 4, further enhancing smoother movement.

Claims

1. A high-load-bearing semi-trailer frame, comprising two longitudinal beams (1) and several transverse beams (2); characterized in that, The front end of the longitudinal beam (1) is fixedly connected to a traction assembly (3), the bottom surface of the longitudinal beam (1) is fixedly connected to a reinforcing box (4), a drive shaft (5) is rotatably connected inside the reinforcing box (4), a drive motor (12) is provided at one end of the drive shaft (5), a moving seat (6) is threadedly connected to the drive shaft (5), a support plate (7) is fixedly connected to the inside of the reinforcing box (4), a connecting column (8) is fixedly connected to the bottom surface of the moving seat (6), a drive cylinder (9) is fixedly connected to the bottom surface of the connecting column (8), an mounting plate (10) is fixedly connected to the piston rod end of the drive cylinder (9), and an auxiliary wheel (11) is provided on the mounting plate (10).

2. The high-load-bearing capacity semi-trailer frame as described in claim 1, characterized in that: Several crossbeams (2) are evenly arranged along the length of the longitudinal beam (1), and the traction assembly (3) includes several transverse tie rods arranged between the two longitudinal beams (1) and connecting plates arranged between the transverse tie rods.

3. A high-load-bearing capacity semi-trailer frame as described in claim 2, characterized in that: The reinforcing box (4) is located at the front end of the longitudinal beam (1), and several reinforcing ribs are fixedly connected to the longitudinal beam (1).

4. A high-load-bearing capacity semi-trailer frame as described in claim 3, characterized in that: The drive motor (12) is located on the outside of the reinforcing box (4), and a protective box is provided on the outside of the drive motor (12).

5. A high-load-bearing capacity semi-trailer frame as described in claim 4, characterized in that: A guide rod is fixedly connected inside the reinforcing box (4), and the movable seat (6) is sleeved on the guide rod.

6. A high-load-bearing capacity semi-trailer frame as described in claim 5, characterized in that: The top and bottom surfaces of the movable seat (6) are provided with a number of ball bearings, and the tray (7) is provided with two rows in each reinforcing box (4) and symmetrically arranged on both sides of the connecting column (8).

7. A high-load-bearing capacity semi-trailer frame as described in claim 6, characterized in that: The auxiliary wheel (11) is a swivel wheel.

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