Connecting arm of container transportation semitrailer and semitrailer thereof

Abstract

The invention provides a connecting arm of a container transportation semitrailer and the semitrailer, the upper end of the whole connecting arm tends to be gradually heightened in the direction away from a semitrailer head, and the lower end of the whole connecting arm tends to contract upwards and then expand downwards; the end, away from the vehicle head, of the connecting arm is folded downwards to form a connecting part, and an arc-shaped stress part is arranged at the end, facing the vehicle head, of the lower end of the connecting part.

Description

Technical Field

[0001] This invention relates to the field of special vehicle technology, and in particular to a connecting arm for a container transport semi-trailer and the semi-trailer thereof. Background Technology

[0002] A semi-trailer is a trailer whose axle is located behind the vehicle's center of gravity (when the vehicle is evenly loaded) and equipped with a coupling device that transmits horizontal and vertical forces to the tractor. It typically consists of a cab that provides traction and a trailer that carries the cargo.

[0003] The connecting arm (neck) is the main connection between the trailer and the tractor. After the cargo is placed, the neck sinks and bears a large installation stress. During the semi-trailer's movement, due to turning, going uphill and downhill, and bumpy sections, the neck usually has to withstand impact forces from all directions in addition to the already large traction force. This part is prone to stress concentration and deformation.

[0004] Traditional semi-trailers typically reduce the overall load of a single trailer by making the trailer section smaller to reduce stress concentration at the neck, or by connecting multiple trailers in a segmented manner. However, these methods are generally more suitable for cargo transport on roads without sharp turns or steep gradients. During long-distance transport and on roads with sharp turns and steep gradients, the neck will experience significant shear stress and deformation. Simply adding a reinforcing plate between the two lever arms at the neck will still cause torsional deformation of the lever arms. Summary of the Invention

[0005] To address the above problems, this invention provides a connecting arm for a container transport semi-trailer and the semi-trailer thereof, which is implemented as follows: A connecting arm for a container transport semi-trailer, wherein the upper part of the connecting arm is arranged to gradually increase in the direction away from the front of the vehicle, and the lower part of the connecting arm is arranged to first contract upward and then expand downward. The end of the connecting arm away from the front of the vehicle is folded down to form a connecting part, and an arc-shaped stress part is provided at the lower end of the connecting part facing the front of the vehicle.

[0006] As a further improvement, the connecting part specifically includes a pair of symmetrical and spaced lever arm plates, the longitudinal cross-section of the two lever arm plates is "I-shaped", and the two lever arm plates are fixedly connected by a number of spaced connecting plates. A docking plate is provided at the lower end of the two lever arm plates near the front of the vehicle. A connecting pin is provided at the lower end of the docking plate. After the connecting pin is inserted into the pin hole of the front of the vehicle, the front of the vehicle is rotatably connected to the semi-trailer.

[0007] As a further improvement, the bottom of the lever arm plate near the front of the vehicle extends downward at an angle away from the front of the vehicle to form a clearance portion. A transition portion is provided between the clearance portion and the arc-shaped stress portion. The transition portion includes a first transition portion extending upward first and a second transition portion extending downward. The rising and falling parts of the transition portion are either straight or arc-shaped. The lower end of the arc-shaped stress portion extends vertically downward and then folds horizontally away from the front of the vehicle to form a load-bearing portion. The upper part of the lever arm plate near the front of the vehicle is arranged to gradually increase in the direction away from the front of the vehicle to form a buffer part. The buffer part includes a first buffer part near the front of the vehicle and a second buffer part away from the front of the vehicle. The tilt angle of the first buffer part is greater than the tilt angle of the second buffer part. The end of the second buffer part away from the first buffer part is folded down to form a baffle part. The lower end of the baffle part is folded horizontally towards the arc-shaped stress part and abuts against the arc-shaped stress part to form an end part. The frame abuts against the baffle and is mounted on the load-bearing part before being fixedly connected to the connecting arm.

[0008] As a further improvement, the length of the first buffer section is defined as L, then the length of the second buffer section is 2 / 3 to 3 / 4L, and the highest point of the transition section is located on the vertical plane at a distance of 1 / 5 to 1 / 3L from the turning point between the first buffer section and the second buffer section. The starting point of the arc-shaped stress section is located on the vertical plane at a distance of 1 / 6 to 1 / 5L from the turning point of the second buffer section and the first buffer section. The ending point of the arc-shaped stress section is located on the vertical plane at a distance of 1 / 3 to 1 / 2L from the turning point of the second buffer section and the first buffer section.

[0009] As a further improvement, a number of reinforcing ribs are provided between the arc-shaped stress portion, the second buffer portion, and the baffle portion, and the reinforcing ribs do not point to the center of the arc-shaped stress portion.

[0010] As a further improvement, the mating plate fits the lower surface contour of the first transition portion and is fixedly disposed on the lower surface of the first transition portion, and the inclination angle of the first transition portion and the second transition portion does not exceed 3°, or the angle between the tangent at the starting point of the first transition portion and the tangent at the ending point of the second transition portion does not exceed 5°.

[0011] As a further improvement, a plurality of connecting reinforcing rods are arranged in a cross pattern in the area corresponding to the first transition section between the two lever arms. The lower end surface of the connecting reinforcing rod is fixedly connected to the connecting plate, and a first reinforcing plate is vertically arranged at the upper end of the connecting reinforcing rod. The upper end of the first reinforcing plate is in contact with the steel plate portion of the lever arm plate that is folded inward. Several second reinforcing plates are inclinedly arranged between the two lever arms in the area corresponding to the second transition section, and the upper end of the second reinforcing plates is not in contact with the steel plate portion of the lever arms that is folded inward.

[0012] The present invention also provides a container transport semi-trailer, including the connecting arm of the container transport semi-trailer described above.

[0013] The beneficial effects of this invention are as follows: 1. Traditional semi-trailer connecting arms are generally straight. When going uphill, downhill, or on bumpy roads, straight connecting arms are poor at withstanding shear forces in the vertical direction and are prone to deformation, leading to unstable connections. In contrast, the connecting arm in this application is generally arc-shaped, and the arc-shaped neck is superior to a straight arm in withstanding shear forces.

[0014] 2. A straight connecting arm is prone to stretching and tilting at the head under straight-line traction, leading to unstable connection of the connecting pin. In contrast, the connecting arm in this application is arc-shaped, with the part near the front of the vehicle sinking downwards. During traction, it undergoes straightening deformation, causing the pin at the end away from the front of the vehicle to sink, reducing the likelihood of the pin detaching from the front of the vehicle and colliding with it. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the semi-trailer of the present invention.

[0016] Figure 2 This is a schematic diagram of the overall structure of the connecting arm of the present invention.

[0017] Figure 3 This is a schematic diagram of the connecting arm of the present invention viewed from below. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0019] In the description of this invention, 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 indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0020] A connecting arm for a container transport semi-trailer, wherein the upper part of the connecting arm is arranged to gradually increase in the direction away from the front of the vehicle, and the lower part of the connecting arm is arranged to first contract upward and then expand downward. The end of the connecting arm away from the front of the vehicle is folded down to form a connecting part, and an arc-shaped stress part is provided at the lower end of the connecting part facing the front of the vehicle.

[0021] As a further improvement, the connecting part specifically includes a pair of symmetrical and spaced lever arm plates, the longitudinal cross-section of the two lever arm plates is "I-shaped", and the two lever arm plates are fixedly connected by a number of spaced connecting plates. A docking plate is provided at the lower end of the two lever arm plates near the front of the vehicle. A connecting pin is provided at the lower end of the docking plate. After the connecting pin is inserted into the pin hole of the front of the vehicle, the front of the vehicle is rotatably connected to the semi-trailer.

[0022] As a further improvement, the bottom of the lever arm plate near the front of the vehicle extends downward at an angle away from the front of the vehicle to form a clearance portion. A transition portion is provided between the clearance portion and the arc-shaped stress portion. The transition portion includes a first transition portion extending upward first and a second transition portion extending downward. The rising and falling parts of the transition portion are either straight or arc-shaped. The lower end of the arc-shaped stress portion extends vertically downward and then folds horizontally away from the front of the vehicle to form a load-bearing portion. The upper part of the lever arm plate near the front of the vehicle is arranged to gradually increase in the direction away from the front of the vehicle to form a buffer part. The buffer part includes a first buffer part near the front of the vehicle and a second buffer part away from the front of the vehicle. The tilt angle of the first buffer part is greater than the tilt angle of the second buffer part. The end of the second buffer part away from the first buffer part is folded down to form a baffle part. The lower end of the baffle part is folded horizontally towards the arc-shaped stress part and abuts against the arc-shaped stress part to form an end part. The frame abuts against the baffle and is mounted on the load-bearing part before being fixedly connected to the connecting arm.

[0023] As a further improvement, the length of the first buffer section is defined as L, then the length of the second buffer section is 2 / 3 to 3 / 4L, and the highest point of the transition section is located on the vertical plane at a distance of 1 / 5 to 1 / 3L from the turning point between the first buffer section and the second buffer section. The starting point of the arc-shaped stress section is located on the vertical plane at a distance of 1 / 6 to 1 / 5L from the turning point of the second buffer section and the first buffer section. The ending point of the arc-shaped stress section is located on the vertical plane at a distance of 1 / 3 to 1 / 2L from the turning point of the second buffer section and the first buffer section.

[0024] As a further improvement, a number of reinforcing ribs are provided between the arc-shaped stress portion, the second buffer portion, and the baffle portion, and the reinforcing ribs do not point to the center of the arc-shaped stress portion.

[0025] As a further improvement, the mating plate fits the lower surface contour of the first transition portion and is fixedly disposed on the lower surface of the first transition portion, and the inclination angle of the first transition portion and the second transition portion does not exceed 3°, or the angle between the tangent at the starting point of the first transition portion and the tangent at the ending point of the second transition portion does not exceed 5°.

[0026] As a further improvement, a plurality of connecting reinforcing rods are arranged in a cross pattern in the area corresponding to the first transition section between the two lever arms. The lower end surface of the connecting reinforcing rod is fixedly connected to the connecting plate, and a first reinforcing plate is vertically arranged at the upper end of the connecting reinforcing rod. The upper end of the first reinforcing plate is in contact with the steel plate portion of the lever arm plate that is folded inward. Several second reinforcing plates are inclinedly arranged between the two lever arms in the area corresponding to the second transition section, and the upper end of the second reinforcing plates is not in contact with the steel plate portion of the lever arms that is folded inward.

[0027] The present invention also provides a container transport semi-trailer, including the connecting arm of the container transport semi-trailer described above.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A connecting arm for a container transport semi-trailer, characterized in that, The upper part of the connecting arm is designed to gradually increase in height away from the front of the vehicle, and the lower part of the connecting arm is designed to first contract upward and then expand downward. The end of the connecting arm away from the front of the vehicle is folded downward to form a connecting part, and the lower end of the connecting part facing the front of the vehicle is provided with an arc-shaped stress part.

2. The connecting arm of a container transport semi-trailer as described in claim 1, characterized in that, The connecting part specifically includes a pair of symmetrical and spaced lever arm plates, the longitudinal cross-section of the two lever arm plates is "I-shaped", and the two lever arm plates are fixedly connected by several spaced connecting plates. A docking plate is provided at the lower end of the two lever arm plates near the front of the vehicle. A connecting pin is provided at the lower end of the docking plate. After the connecting pin is inserted into the pin hole of the front of the vehicle, the front of the vehicle is rotatably connected to the semi-trailer.

3. The connecting arm of a container transport semi-trailer as described in claim 2, characterized in that, The bottom of the lever arm plate near the front of the vehicle extends downward at an angle away from the front of the vehicle to form a clearance portion. A transition portion is provided between the clearance portion and the arc-shaped stress portion. The transition portion includes a first transition portion that extends upward first and a second transition portion that extends downward. The rising and falling parts of the transition portion are either straight or arc-shaped. The lower end of the arc-shaped stress portion extends vertically downward and then folds horizontally away from the front of the vehicle to form a load-bearing portion. The upper part of the lever arm plate near the front of the vehicle is arranged to gradually increase in the direction away from the front of the vehicle to form a buffer part. The buffer part includes a first buffer part near the front of the vehicle and a second buffer part away from the front of the vehicle. The tilt angle of the first buffer part is greater than the tilt angle of the second buffer part. The end of the second buffer part away from the first buffer part is folded down to form a baffle part. The lower end of the baffle part is folded horizontally towards the arc-shaped stress part and abuts against the arc-shaped stress part to form an end part. The frame abuts against the baffle and is mounted on the load-bearing part before being fixedly connected to the connecting arm.

4. The connecting arm of a container transport semi-trailer as described in claim 3, characterized in that, If the length of the first buffer section is defined as L, then the length of the second buffer section is 2 / 3 to 3 / 4 L. The highest point of the transition section is located on the vertical plane at a distance of 1 / 5 to 1 / 3 L from the turning point between the first buffer section and the second buffer section. The starting point of the arc-shaped stress section is located on the vertical plane at a distance of 1 / 6 to 1 / 5L from the turning point of the second buffer section and the first buffer section. The ending point of the arc-shaped stress section is located on the vertical plane at a distance of 1 / 3 to 1 / 2L from the turning point of the second buffer section and the first buffer section.

5. The connecting arm of a container transport semi-trailer as described in claim 3, characterized in that, A plurality of reinforcing ribs are also provided between the arc-shaped stress section, the second buffer section, and the baffle section, and the reinforcing ribs do not point to the center of the arc-shaped stress section.

6. The connecting arm of a container transport semi-trailer as described in claim 3, characterized in that, The mating plate fits the lower surface contour of the first transition portion and is fixedly disposed on the lower surface of the first transition portion. The inclination angle of the first transition portion and the second transition portion does not exceed 3°, or the angle between the tangent at the starting point of the first transition portion and the tangent at the ending point of the second transition portion does not exceed 5°.

7. The connecting arm of a container transport semi-trailer as described in claim 3, characterized in that, A plurality of connecting reinforcing rods are arranged in a cross pattern in the area corresponding to the first transition section between the two lever arm plates. The lower end surface of the connecting reinforcing rod is fixedly connected to the connecting plate. A first reinforcing plate is vertically arranged at the upper end of the connecting reinforcing rod. The upper end of the first reinforcing plate is in contact with the steel plate portion of the lever arm plate that is folded inward. Several second reinforcing plates are inclinedly arranged between the two lever arms in the area corresponding to the second transition section, and the upper end of the second reinforcing plates is not in contact with the steel plate portion of the lever arms that is folded inward.

8. A container transport semi-trailer, characterized in that, Includes the connecting arm of a container transport semi-trailer as described in any one of claims 1-7.

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