Heavy trailer arm

Abstract

The utility model relates to a heavy trailer arm, and belongs to the technical field of trailer hooks. A heavy trailer arm comprises an installation part, a transition part and a ball seat part which are integrally connected, and the two ends of the transition part are in smooth transition connection with the installation part and the ball seat part respectively. The mounting part comprises an upper layered body, a lower layered body and a cylindrical body supported between the upper layered body and the lower layered body; a through hole facilitating installation of the trailer arm is formed in the cylindrical body. An upper connecting part and a lower connecting part are arranged at one end of the transition part, and the upper layered body and the lower layered body are connected with the transition part through the upper connecting part and the lower connecting part respectively. The trailer arm is designed into the mounting part, the transition part and the ball seat part, and the mounting part is designed into the upper layered body, the lower layered body and the supporting body, so that the structural strength is obviously enhanced.

Description

Technical Field

[0001] The utility model relates to a trailer arm for towing a non-powered trailer, in particular to a heavy-duty trailer arm, and belongs to the technical field of trailer hooks. Background Art

[0002] The driving of non-powered trailers is usually solved by connecting a ball head trailer hook and a ball head cover. This connection method ensures that the tractor and trailer are rigidly connected, and the tractor and trailer can rotate flexibly, so that the combined vehicle structure of "tractor-trailer" can travel normally on urban and rural roads.

[0003] For example, a utility model patent with authorization announcement number CN 220242910U discloses a vehicle towing rear trailer device, which includes: it includes a trailer slot device and a trailer hook device, the trailer slot device is composed of a trailer hook connecting column, a trailer arm and a ball head trailer, the trailer hook connecting column is provided with a first through-type circular hole, a positioning pin is provided in the first through-type circular hole, and the positioning pin is locked by a positioning clip, the trailer hook device is composed of a frame connecting plate and a trailer hook sleeve, the trailer hook sleeve has a trailer hook slot hole, the trailer hook sleeve is provided with a second through-type circular hole, and the first through-type circular hole of the trailer hook connecting column and the second through-type circular holes provided on both sides of the trailer hook sleeve correspond one to one.

[0004] However, since trailers have various specifications, especially different load capacities, trailer hook devices usually also have various models. When it is necessary to tow a heavy trailer, such as a trailer weighing 5 tons or even more than 10 tons, the trailer device provided by the above utility model patent is not applicable.

[0005] The towing devices currently available on the market can usually only tow trailers under 7,500 pounds. For heavy trailers, such as large RVs with high configurations, it is difficult to apply. Utility Model Content

[0006] The utility model aims to solve the above problems, thereby providing a heavy-duty trailer arm. The heavy-duty trailer arm of the utility model has the advantages of high strength and relatively light weight through structural design and hot forging.

[0007] The technical solution of the utility model to solve the above problems is as follows:

[0008] A heavy-duty trailer arm comprises an integrally connected mounting portion, a transition portion and a ball seat portion, wherein the two ends of the transition portion are respectively smoothly transitionally connected to the mounting portion and the ball seat portion; the mounting portion comprises an upper layer body, a lower layer body and a columnar body supported between the upper layer body and the lower layer body; the columnar body is provided with a through hole for facilitating the installation of the trailer arm; an upper connecting portion and a lower connecting portion are provided at one end of the transition portion, and the upper layer body and the lower layer body are respectively connected to the transition portion through the upper connecting portion and the lower connecting portion.

[0009] In the above technical solution of the utility model, the trailer arm is designed as a mounting part, a transition part and a ball seat part, and the mounting part is designed as an upper layer body, a lower layer body and a support body, so that the structural strength is significantly enhanced and the weight of the trailer arm is reduced. In addition, the heavy-duty trailer arm is made of 45# steel by hot forging, which further increases the product strength, thereby reaching a trailer weight of 21,000 pounds (10 tons).

[0010] As a preferred embodiment of the above technical solution, an inwardly curved rounded corner structure is formed between the upper connecting portion and the lower connecting portion.

[0011] As a preferred embodiment of the above technical solution, the end faces of the front and rear ends of the columnar body are concave cylindrical arc surfaces.

[0012] As a preferred embodiment of the above technical solution, the side surfaces on the left and right sides of the columnar body are concave flat surfaces.

[0013] In the above technical solution of the utility model, the designs of the inward-curved rounded corner structure, the inward-concave cylindrical arc and the inward-concave flat surface strengthen the transition connection between multiple partitions, optimize the conduction and dispersion of the internal stress generated by the load between the installation part and the transition part, and further improve the strength of the product.

[0014] As a preferred embodiment of the above technical solution, a sheet connector is further arranged between the upper layer body and the lower layer body; the sheet connector includes a first sheet connector arranged between the column body and the transition part and a second sheet connector arranged on the side of the column body away from the transition part.

[0015] In the above technical solution of the utility model, the first sheet-like connecting body and the second sheet-like connecting body optimize the force transmission between the upper layer body and the lower layer body, and further improve the strength of the product.

[0016] As a preferred embodiment of the above technical solution, the first sheet-like connecting body and the upper layered body, the lower layered body and the columnar body together form a nest-like structure with four sides closed.

[0017] As a preferred embodiment of the above technical solution, the first sheet-like connector includes a thick sheet body close to the transition portion and a thin sheet body close to the columnar body, so that the socket structure is divided into a shallow socket area corresponding to the thick sheet body and a deep socket area corresponding to the thin sheet body.

[0018] In the above technical solution of the utility model, the separation design of the shallow dimple area and the deep dimple area further optimizes the force transmission and further improves the strength of the product.

[0019] As a preferred embodiment of the above technical solution, the shallow dimple area and the deep dimple area are integrally connected and smoothly transitioned.

[0020] As a preferred embodiment of the above technical solution, the first sheet-like connecting body, the upper layer body, the lower layer body and the columnar body together form a second nest-like structure with a flat bottom and a through opening at the end.

[0021] In the above technical solution of the utility model, the arrangement of the nest-shaped structure enables the utility model to reduce the overall weight while ensuring the strength.

[0022] As a preferred embodiment of the above technical solution, the angle α formed between the mounting portion and the transition portion is 120-150°; the angle β formed between the ball seat portion and the transition portion is complementary to the angle α.

[0023] In summary, the utility model has the following beneficial effects:

[0024] 1. The utility model significantly enhances the structural strength by designing the trailer arm as a mounting portion, a transition portion and a ball seat portion, and designing the mounting portion as an upper layered body, a lower layered body and a supporting body. In addition, the heavy-duty trailer arm is made of 45# steel by hot forging, which further increases the product strength, thereby achieving a trailer weight of 21,000 pounds (10 tons);

[0025] 2. The utility model further optimizes the force transmission between components and improves the strength of the product through various structural designs in subtle places. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0027] Figure 2 yes Figure 1 Side view of

[0028] In the figure, 1-mounting portion, 2-transition portion, 3-ball seat portion;

[0029] 11-upper layer body, 12-lower layer body, 13-columnar body, 14-first sheet-shaped connecting body, 15-second sheet-shaped connecting body, 16-through hole;

[0030] 21-upper connecting portion, 22-lower connecting portion, 23-rounded structure;

[0031] 13-1- cylindrical arc surface, 13-2- flat surface, 14-1- thick sheet, 14-2- thin sheet. DETAILED DESCRIPTION

[0032] The present invention is further explained below in conjunction with the accompanying drawings.

[0033] This specific implementation is only an explanation of the utility model, not a limitation of the utility model. Any changes made by those skilled in the art after reading the specification of the utility model will be protected by the patent law as long as they are within the scope of the claims.

[0034] like Figure 1~2 As shown, a heavy-duty trailer arm is made of 45# steel by hot forging and is designed to have a trailer weight of 21,000 pounds.

[0035] Specifically, the overall structure of the heavy-duty trailer arm is integrated. It includes a mounting portion 1, a transition portion 2 and a ball seat portion 3; the two ends of the transition portion 2 are smoothly transitionally connected to the mounting portion 1 and the ball seat portion 3 respectively. The angle α formed between the mounting portion 1 and the transition portion 2 is 120°; the angle β formed between the ball seat portion 3 and the transition portion 2 is 60°, so the mounting portion 1 and the ball seat portion 3 are basically parallel.

[0036] In order to strengthen the structure and reduce its own weight, the heavy-duty trailer arm of the utility model has a structural design for the mounting portion 1. Specifically, Figure 2As shown, the mounting portion 1 includes an upper layer 11, a lower layer 12, and a columnar body 13 supported between the upper layer 11 and the lower layer 12; the columnar body 13 is provided with a through hole 16 for facilitating the installation of the trailer arm. The end faces of the front and rear ends of the columnar body 13 are concave cylindrical arc surfaces 13-1, and the side faces on the left and right sides are concave flat surfaces 13-2. A sheet connector is also provided between the upper layer 11 and the lower layer 12, including a first sheet connector 14 provided between the columnar body 13 and the transition portion 2, and a second sheet connector 15 provided on the side of the columnar body 13 away from the transition portion 2. Furthermore, the first sheet connector 14, the upper layer 11, the lower layer 12, and the columnar body 13 together form a nest-like structure that is closed on all sides. The first sheet-like connector 14 includes a thick sheet body 14-1 near the transition portion and a thin sheet body 14-2 near the columnar body 13, so that the nest-like structure is divided into a shallow nest area corresponding to the thick sheet body 14-1 and a deep nest area corresponding to the thin sheet body 14-2. The shallow nest area and the deep nest area are integrally connected and smoothly transitioned. The first sheet-like connector 14, the upper layer body 11, the lower layer body 12 and the columnar body 13 together form a second nest-like structure with a flat bottom and a through opening at the end. The utility model enhances the force conduction between various parts and improves the strength of the product by optimizing the structure in the above-mentioned various subtle places.

[0037] The utility model also optimizes the design between the mounting portion 1 and the transition portion 2. Specifically, an upper connecting portion 21 and a lower connecting portion 22 are provided at one end of the transition portion 2, and the upper layered body 11 and the lower layered body 12 are connected to the transition portion 2 through the upper connecting portion 21 and the lower connecting portion 22, respectively. An inwardly curved rounded corner structure 23 is formed between the upper connecting portion 21 and the lower connecting portion 22. The connection between the upper layered body 11 and the upper connecting portion 21, the connection between the lower layered body 12 and the lower connecting portion 22, and the inwardly curved rounded corner structure and other designs strengthen the transition connection between the mounting portion 1 and the transition portion 2, and further improve the strength of the product.

Claims

1. A heavy-duty trailer arm, comprising a mounting portion (1), a transition portion (2) and a ball seat portion (3) connected in an integral manner, wherein two ends of the transition portion (2) are smoothly transitionally connected to the mounting portion (1) and the ball seat portion (3), respectively; characterized in that: The mounting portion (1) comprises an upper layered body (11), a lower layered body (12), and a columnar body (13) supported between the upper layered body (11) and the lower layered body (12); the columnar body (13) is provided with a through hole (16) for facilitating the installation of the trailer arm; an upper connecting portion (21) and a lower connecting portion (22) are provided at one end of the transition portion (2); the upper layered body (11) and the lower layered body (12) are connected to the transition portion (2) via the upper connecting portion (21) and the lower connecting portion (22), respectively.

2. A heavy-duty trailer arm according to claim 1, characterized in that: An inwardly curved rounded corner structure (23) is formed between the upper connecting portion (21) and the lower connecting portion (22).

3. A heavy-duty trailer arm according to claim 1, characterized in that: The end surfaces at the front and rear ends of the columnar body (13) are concave cylindrical arc surfaces (13-1).

4. A heavy-duty trailer arm according to claim 1, characterized in that: The side surfaces on the left and right sides of the columnar body (13) are concave straight surfaces (13-2).

5. The heavy-duty trailer arm according to claim 1, characterized in that: A sheet-like connector is also provided between the upper layered body (11) and the lower layered body (12); the sheet-like connector comprises a first sheet-like connector (14) provided between the columnar body (13) and the transition portion (2) and a second sheet-like connector (15) provided on a side of the columnar body (13) away from the transition portion (2).

6. A heavy-duty trailer arm according to claim 5, characterized in that: The first sheet-like connecting body (14) and the upper layered body (11), the lower layered body (12) and the columnar body (13) together form a closed nest-shaped structure.

7. A heavy-duty trailer arm according to claim 6, characterized in that: The first sheet-shaped connecting body (14) comprises a thick sheet body (14-1) close to the transition portion and a thin sheet body (14-2) close to the columnar body (13), so that the socket-shaped structure is divided into a shallow socket area corresponding to the thick sheet body (14-1) and a deep socket area corresponding to the thin sheet body (14-2).

8. A heavy-duty trailer arm according to claim 7, characterized in that: The shallow dimple area and the deep dimple area are integrally connected and smoothly transitioned.

9. The heavy-duty trailer arm according to claim 5, characterized in that: The first sheet-like connecting body (14) and the upper layered body (11), the lower layered body (12) and the columnar body (13) are combined to form a second nest-like structure with a flat bottom and a through opening at the end.

10. The heavy-duty trailer arm according to claim 1, characterized in that: The angle α formed between the mounting portion (1) and the transition portion (2) is 120-150°; the angle β formed between the ball seat portion (3) and the transition portion (2) is complementary to the angle α.

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