Semitrailer capable of quickly adjusting wheelbase

Abstract

The utility model discloses a semitrailer capable of quickly adjusting axle distance, which comprises a frame, a lifting support leg and a traveling mechanism, a first traction pin, a second traction pin and a third traction pin are respectively arranged on the lower side of the frame, the third traction pin is positioned on the edge of the front end of the frame, and the second traction pin is positioned on one side of the third traction pin. The first traction pin is located on one side of the third traction pin, and the first traction pin, the second traction pin and the third traction pin are arranged on the lower side of the front end of the frame in an equidistant linear array shape. According to the semitrailer capable of rapidly adjusting the wheelbase, through the first traction pin, the second traction pin and the third traction pin, a user can change the frame to different wheelbases according to driving in different areas, so that the semitrailer can adapt to different roads, the applicability is improved, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of semi-trailers, in particular to a semi-trailer with a quick-adjustable wheelbase. Background Art

[0002] With economic development, the national logistics industry has grown rapidly. However, my country's terrain is diverse, and vehicle requirements are regionalized. For example, in the Yunnan, Guizhou, and Sichuan regions, with numerous mountainous roads, many turns, and many ups and downs, a shorter wheelbase is required for semi-trailers, which makes the vehicles more flexible and has a smaller turning radius, but at the same time reduces the longitudinal stability of the vehicle. In plain areas, with straight and flat roads, a longer wheelbase is required for semi-trailers to improve the longitudinal stability of the vehicle, but of course, the turning radius is larger and the flexibility is reduced. A longer or shorter wheelbase has both advantages and disadvantages, depending on the terrain.

[0003] However, the rapid development of the logistics industry has broken the regional restrictions. Transport vehicles often transport goods from the plain area to the Yunnan-Guizhou-Sichuan area, and then transport goods from Yunnan-Guizhou-Sichuan back to the plain area, which reduces the applicability of the vehicles. Therefore, it is urgent to design a semi-trailer with a quick wheelbase adjustment to solve the above problem. Utility Model Content

[0004] The purpose of the utility model is to provide a semi-trailer with a quick-adjustable wheelbase, so as to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A semi-trailer with quick wheelbase adjustment includes a frame, lifting legs and a walking mechanism, wherein a first traction pin, a second traction pin and a third traction pin are respectively provided on the lower side of the frame, the third traction pin is located at the front end edge of the frame, the second traction pin is located on one side of the third traction pin, and the first traction pin is located on one side of the third traction pin, and the first traction pin, the second traction pin and the third traction pin are arranged in an equidistant linear array on the lower side of the front end of the frame.

[0007] A connecting bracket is provided on one side of the lifting leg, and fixing brackets are fixedly installed on both sides of the frame. The lifting leg is connected to the fixing bracket through the connecting bracket.

[0008] A rotating frame is rotatably mounted on the lower end of the lifting leg, and a grounding plate is provided on the lower side of the rotating frame.

[0009] The lifting leg is located between the first traction pin and the walking mechanism.

[0010] The number of the traveling mechanisms is three, and the three traveling mechanisms are arranged in an equidistant linear array on the lower side of the frame.

[0011] The walking mechanism includes a fixed arm, a rotating arm, a supporting oil cylinder, a wheel axle frame, a tire and an axle. The fixed arm is fixedly mounted on the lower side of the vehicle frame, the rotating arm is rotatably mounted on the lower side of the fixed arm, and both ends of the supporting oil cylinder are rotatably connected to one side of the rotating arm and one side of the fixed arm respectively. The wheel axle frame is arranged on one side of the rotating arm, the axle is arranged between the wheel axle frame and the rotating arm, and the tire is arranged at both ends of the wheel axle.

[0012] In the above technical solution, the utility model provides a semi-trailer with a quick wheelbase adjustment, which has the following beneficial effects:

[0013] (1) The semi-trailer with quick wheelbase adjustment provided by the present invention can enable the user to replace the frame to different wheelbases according to driving in different areas through the first traction pin, the second traction pin and the third traction pin, so that the vehicle can adapt to different roads, improve applicability, and improve safety.

[0014] (2) The semi-trailer with quick wheelbase adjustment provided by the present invention can ensure the strength requirements of the longitudinal beam assembly and reduce its own weight, thereby reducing manufacturing costs, increasing loading capacity, and improving transportation efficiency.

[0015] (3) The semi-trailer with quick wheelbase adjustment provided by the utility model can control the raising and lowering of the front part of the semi-trailer by raising and lowering the support legs, and assist in the connection and disconnection of the tractor and the semi-trailer, thereby improving the convenience of users in adjusting the wheelbase of the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 The present invention provides a schematic diagram of the side structure of a semi-trailer with a quick wheelbase adjustment embodiment of the present invention.

[0018] Figure 2 The present invention is a schematic diagram of a semi-trailer with a quick wheelbase adjustment embodiment provided with a frame structure viewed from above.

[0019] Figure 3 The present invention is a schematic diagram of the front end structure of a semi-trailer frame provided in an embodiment of the present invention for quickly adjusting the wheelbase.

[0020] 1. Frame; 2. Lifting legs; 3. First traction pin; 4. Second traction pin; 5. Third traction pin; 6. Travel mechanism; 7. Fixed bracket; 8. Connecting bracket; 9. Rotating frame; 10. Ground plate; 11. Fixed arm; 12. Rotating arm; 13. Support cylinder; 14. Axle frame; 16. Tire; 17. Axle. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1-3 As shown, an embodiment of the present invention provides a semi-trailer with quick wheelbase adjustment, including a frame 1, a lifting leg 2 and a walking mechanism 6. A first traction pin 3, a second traction pin 4 and a third traction pin 5 are respectively provided on the lower side of the frame 1. The third traction pin 5 is located at the front end edge of the frame 1, the second traction pin 4 is located on one side of the third traction pin 5, and the first traction pin 3 is located on one side of the third traction pin 5. The first traction pin 3, the second traction pin 4 and the third traction pin 5 are arranged in an equidistant linear array on the lower side of the front end of the frame 1.

[0023] Specifically, in this embodiment, the distance from the traction pin to the first axle of the front running mechanism 6 is C. Through the first traction pin 3, the second traction pin 4, and the third traction pin 5, the semi-trailer forms three distances, namely, C1 from the first traction pin 3 to the first axle, C2 from the second traction pin 4 to the first axle, and C3 from the third traction pin 5 to the first axle, where C1 < C2 < C3.

[0024] When the semi-trailer is transported in mountainous areas such as Yunnan, Guizhou and Sichuan, the first traction pin 3 of the tractor and the frame 1 is connected to make the wheelbase C1, forming a short wheelbase driving, reducing the turning radius and improving operational flexibility. When the semi-trailer is transported in flat areas such as plains, the third traction pin 5 of the tractor and the frame 1 is connected to make the wheelbase C3, forming a long wheelbase driving, improving the longitudinal stability of the vehicle and making it safer. When the semi-trailer is transported in non-plain and non-mountainous areas, the second traction pin 4 of the tractor and the frame 1 is connected to make the wheelbase C2, forming a medium wheelbase driving, taking into account both operational flexibility and longitudinal stability.

[0025] By connecting the vehicle frame 1 and the tractor using one of the first tractor pin 3 , the second tractor pin 4 and the third tractor pin 5 , the connection and disconnection of the vehicle frame 1 and the tractor can be completed within a few minutes.

[0026] The utility model provides a semi-trailer with a quick wheelbase adjustment. A connecting bracket 8 is provided on one side of the lifting leg 2, and fixed brackets 7 are fixedly installed on both sides of the frame 1. The lifting leg 2 is connected to the fixed bracket 7 through the connecting bracket 8. A rotating frame 9 is rotatably installed on the lower end of the lifting leg 2, and a grounding plate 10 is provided on the lower side of the rotating frame 9. The lifting leg 2 is located between the first traction pin 3 and the walking mechanism 6.

[0027] In one embodiment provided by the present invention, the lifting and lowering of the front part of the frame 1 can be controlled by the lifting legs 2, and the connection and disconnection of the tractor and the frame 1 are assisted, which is suitable for fully loaded and unloaded working conditions. When the semi-trailer transports goods from the mountainous areas of Yunnan, Guizhou and Sichuan, passes through non-mountainous and non-plain areas, and arrives at a plain and flat area, before starting transportation, the lifting legs 2 are started to lift and connect the tractor and the first traction pin 3, so that the semi-trailer forms a short wheelbase. After arriving at the non-mountainous and non-plain area, the lifting legs 2 are started to lift and connect again, and the tractor and the second traction pin 4 are connected, so that the semi-trailer forms a medium wheelbase. After arriving at the plain and flat area, the lifting legs 2 are started to lift and connect again, and the tractor and the third traction pin 5 are connected, so that the semi-trailer forms a long wheelbase.

[0028] The utility model provides a semi-trailer with a quick wheelbase adjustment, wherein the number of the traveling mechanisms 6 is three, and the three traveling mechanisms 6 are arranged in an equidistant linear array on the lower side of the frame 1, the traveling mechanism 6 includes a fixed arm 11, a rotating arm 12, a supporting cylinder 13, an axle frame 14, a tire 16 and an axle 17, the fixed arm 11 is fixedly mounted on the lower side of the frame 1, the rotating arm 12 is rotatably mounted on the lower side of the fixed arm 11, the two ends of the supporting cylinder 13 are rotatably connected to one side of the rotating arm 12 and one side of the fixed arm 11 respectively, the axle frame 14 is arranged on one side of the rotating arm 12, the axle 17 is arranged between the axle frame 14 and the rotating arm 12, and the tire 16 is arranged at both ends of the axle 17.

[0029] In another embodiment provided by the present invention, when the walking mechanism 6 needs to be adjusted, the supporting oil cylinder 13 is started, so that the supporting oil cylinder 13 drives the rotating arm 12 to rotate, and the rotation of the rotating arm 12 can drive the axle frame 14 to rotate, and the rotation of the axle frame 14 can drive the wheel axle 17 and the tire 16 to rotate along the fixed arm 11, thereby completing the adjustment of the walking mechanism 6_.

[0030] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A semi-trailer with a quick wheelbase adjustment, comprising a frame (1), lifting legs (2) and a walking mechanism (6), characterized in that: A first traction pin (3), a second traction pin (4) and a third traction pin (5) are respectively provided on the lower side of the vehicle frame (1); the third traction pin (5) is located at the front end edge of the vehicle frame (1); the second traction pin (4) is located on one side of the third traction pin (5); the first traction pin (3), the second traction pin (4) and the third traction pin (5) are arranged in an equidistant linear array on the lower side of the front end of the vehicle frame (1).

2. A semi-trailer with quick wheelbase adjustment according to claim 1, characterized in that: A connecting bracket (8) is provided on one side of the lifting leg (2), and fixed brackets (7) are fixedly installed on both sides of the vehicle frame (1), and the lifting leg (2) is connected to the fixed bracket (7) via the connecting bracket (8).

3. The semi-trailer with quick wheelbase adjustment according to claim 2, characterized in that: A rotating frame (9) is rotatably mounted on the lower end of the lifting leg (2), and a grounding plate (10) is provided on the lower side of the rotating frame (9).

4. The semi-trailer with quick wheelbase adjustment according to claim 2, characterized in that: The lifting leg (2) is located between the first traction pin (3) and the walking mechanism (6).

5. The semi-trailer with quick wheelbase adjustment according to claim 4, characterized in that: The number of the running mechanisms (6) is three, and the three running mechanisms (6) are arranged in an equidistant linear array on the lower side of the vehicle frame (1).

6. The semi-trailer with quick wheelbase adjustment according to claim 5, characterized in that: The walking mechanism (6) comprises a fixed arm (11), a rotating arm (12), a supporting oil cylinder (13), a wheel axle frame (14), a tire (16) and a wheel axle (17); the fixed arm (11) is fixedly mounted on the lower side of the vehicle frame (1); the rotating arm (12) is rotatably mounted on the lower side of the fixed arm (11); two ends of the supporting oil cylinder (13) are rotatably connected to one side of the rotating arm (12) and one side of the fixed arm (11); the wheel axle frame (14) is arranged on one side of the rotating arm (12); the wheel axle (17) is arranged between the wheel axle frame (14) and the rotating arm (12); and the tire (16) is arranged at both ends of the wheel axle (17).

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