CN221067694U

CN221067694U - Trailer straight hook

Info

Publication number: CN221067694U
Application number: CN202322901998.XU
Authority: CN
Inventors: 林德龙; 黄强; 徐上兰
Original assignee: Ruian Huadong Forging Co ltd
Current assignee: Ruian Huadong Forging Co ltd
Priority date: 2023-10-28
Filing date: 2023-10-28
Publication date: 2024-06-04
Anticipated expiration: 2033-10-28

Abstract

The utility model discloses a trailer straight hook, wherein a welding part is a cylinder extending along a first direction and is used for welding with a front vehicle; the pulling part is of a spherical structure and is arranged at intervals with the welding part; the connecting part is provided with a first extending section used for being connected with the welding part, a second extending section used for being connected with the pulling part, and a third extending section connected with the first extending section and the second extending section, wherein the third extending section is of a linear structure extending along a second direction, and the cross section area of the second extending section is gradually reduced from one end close to the welding part to one end close to the pulling part.

Description

Trailer straight hook

Technical Field

The application belongs to the technical field of trailer couplers, and particularly relates to a trailer straight coupler.

Background

A trailer hook is an important vehicle accessory, the main function of which is to connect a trailer to a tractor, so that the trailer can be towed by the tractor. In the existing trailer hook design, the strength of the trailer hook is lower, and when the trailer hook is subjected to larger traction force, the defects such as cracking and the like are easy to occur, so that the service life and the safety of the trailer hook are influenced. In addition, the existing trailer hook in the market is complex in structure, troublesome in manufacturing process and high in production cost. Therefore, there is a need to solve the above-mentioned technical problems.

Disclosure of Invention

The embodiment of the application aims to provide a trailer straight hook so as to solve the technical problems of low structural strength and complex structure of a trailer hook in the prior art.

In order to achieve the above purpose, the application adopts the following technical scheme: there is provided a trailer hitch comprising:

a welding part which is a cylinder extending along a first direction and is used for welding with a front vehicle;

the pulling part is of a spherical structure and is arranged at intervals with the welding part;

The connecting part is provided with a first extending section used for being connected with the welding part, a second extending section used for being connected with the pulling part, and a third extending section connected with the first extending section and the second extending section, wherein the third extending section is of a linear structure extending along a second direction, and the cross sectional areas of the second extending section and the third extending section are gradually reduced from one end close to the welding part to one end close to the pulling part.

Optionally, the welding part and the third extension section are located in two planes which intersect and have an included angle of 7 °.

Optionally, an included angle between the projection of the welding part on the plane of the third extension section and the third extension section is 125 °.

Optionally, an included angle of 39 ° is formed between the second extension section and the third extension section.

Optionally, the cross-sectional shape of the third extension section is "i" shaped.

Optionally, the first extension section is of a cylindrical structure and has a smooth transition of circular arc shape between the first extension section and the weld.

Optionally, the second extension section is of a cylindrical structure, the diameter of the second extension section is smaller than that of the pulling part, and a circular arc smooth transition is formed between the second extension section and the pulling part.

Optionally, the welding part, the pulling part and the connecting part are integrally formed by forging.

Optionally, grooves extending integrally are formed on the third extension section and the second extension section.

Optionally, the trailer straight hook further comprises a locating plate, wherein the locating plate is installed in the groove and has a preset locating distance from the pulling part.

The trailer straight hook provided by the application has the beneficial effects that: compared with the prior art, the trailer straight hook comprises a welding part, a pulling part and a connecting part. The connecting part comprises a first extending section, a second extending section and a third extending section, wherein the third extending section is of a linear structure extending along the second direction, the cross section area of the second extending section is gradually reduced from one end close to the welding part to one end close to the pulling part, and one side of the connecting part close to the welding part can be used for bearing larger bending load, so that the structural strength of the trailer hook is effectively improved. The trailer direct hook provided by the application has the advantages of simple structure, convenience in production and far superior to the prior art.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a front view of the overall structure of a straight hook of a trailer provided by an embodiment of the present application;

FIG. 2 is a rear view of the overall structure of a straight hook of a trailer provided by an embodiment of the present application;

FIG. 3 is a top view of the overall structure of a trailer hitch provided in an embodiment of the present application;

fig. 4 is a schematic view of a cross-sectional structure along the direction A-A in fig. 3.

Wherein, each reference sign in the figure: 100. a welding part; 200. a pulling part; 301. a first extension; 302. a second extension; 303. a third extension; 400. a groove; 500. and (5) positioning the plate.

Description of the embodiments

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1 to 4, a description will be given of a trailer hitch according to an embodiment of the present application. The present trailer hitch includes a weld 100, a hitch 200, and a connection. Wherein the welding portion 100 is a cylinder extending along the first direction, the welding portion 100 is used for welding with a front vehicle, and the welding portion 100 in this embodiment can be conveniently welded to the front vehicle, that is, the tractor, by adopting a cylindrical structure. The trailer 200 has a spherical structure and is spaced from the welding portion 100, and in this embodiment, the trailer 200 is used for connecting with a rear vehicle, i.e., a trailer. The spherical structure can be conveniently connected with a rear vehicle and has larger steering freedom degree.

The connecting portion in this embodiment has a first extension 301 for connecting with the welding portion 100, a second extension 302 for connecting with the pulling portion 200, and a third extension 303 connected to the first extension 301 and the second extension 302, wherein the third extension 303 has a linear structure extending along the second direction, and the cross-sectional areas of the second extension 302 and the third extension 303 gradually decrease from one end near the welding portion 100 to one end near the pulling portion 200. According to the trailer structure provided in the present embodiment, since the third extension section 303 is a linear structure extending in the second direction and the cross-sectional areas of the second extension section 302 and the third extension section 303 gradually decrease from the end near the welding portion 100 to the end near the hitching portion 200, the side of the connecting portion near the welding portion 100 can be used to bear a larger bending load, and the structural strength of the trailer hook is effectively improved. The trailer direct hook provided by the application has the advantages of simple structure, convenience in production and far superior to the prior art.

In another embodiment of the present application, referring to fig. 1 to 4, the welding portion 100 and the third extension 303 are located in two planes intersecting each other and having an included angle of 7 °. Therefore, the welding portion 100 and the pulling portion 200 provided in the present embodiment have an initial torsion angle, which is beneficial to improving the structural strength of the trailer straight hook.

In another embodiment of the present application, referring to fig. 1 to 4, an included angle between a projection of the welding portion 100 on a plane of the third extension 303 and the third extension 303 is 125 °; the second extension section 302 and the third extension section 303 have an included angle of 39 degrees, so that the trailer hitch 200 and the third extension section 303 have reasonable space structures, and have certain elastic buffering capacity when impacted, so that the structural strength of the trailer straight hook in the embodiment can be further improved, the impact on the trailer connecting assembly can be reduced, and the reliability of the whole trailer assembly is improved.

In another embodiment of the present application, please refer to fig. 1 to 4 together, the cross-sectional shape of the third extension 303 is "i" shaped. It can be appreciated from the foregoing embodiments that the cross-sectional shape of the third extension 303 in this embodiment is not limited, but the cross-sectional shape of the third extension 303 in this embodiment is "i" shaped, relative to other cross-sectional shapes in the art, to provide the trailer hitch with better structural strength.

In another embodiment of the present application, referring to fig. 1 to 4, the first extension 301 has a cylindrical structure and a smooth transition between the first extension 301 and the welding portion 100 has a circular arc shape. According to the structure provided in the present embodiment, the arc-shaped smooth transition between the first extension section 301 and the welding portion 100 can not only eliminate the processing stress therebetween, but also improve the structural strength of the trailer straight hook; the integral direct hook structure of the trailer can be smoother, and the use is convenient.

In another embodiment of the present application, referring to fig. 1 to 4, the second extension 302 has a cylindrical structure, the diameter of the second extension 302 is smaller than that of the trailer 200, and a circular arc smooth transition is formed between the second extension 302 and the trailer 200. According to the structure provided in the present embodiment, the arc-shaped smooth transition between the second extension section 302 and the trailer hitch 200 not only can eliminate the processing stress between the two, but also can improve the structural strength of the trailer straight hook; in addition, since the diameter of the second extension 302 is gradually reduced toward the hitch portion 200, there is also provided a structure that facilitates the attachment of the hitch portion 200 to the rear vehicle.

In another embodiment of the present application, referring to fig. 1 to 4, the welding portion 100, the pulling portion 200 and the connecting portion are integrally formed by forging, so that the straight hook of the trailer has better metal fluid, and is beneficial to maintaining the straight hook of the trailer with better structural strength.

In another embodiment of the present application, referring to fig. 1 to 4, the third extension 303 and the second extension 302 are provided with a groove 400 extending integrally. According to the above structure provided in this embodiment, under the condition of meeting the strength requirement, the grooves 400 provided on the third extension section 303 and the second extension section 302 can be used to eliminate the processing internal stress of the third extension section 303 and the second extension section 302, and can also reduce the consumption of the preparation materials, have obvious economic benefit, and can also improve the capability of making torsion strength.

In another embodiment of the present application, referring to fig. 1 to 4, the trailer hitch further includes a positioning plate 500, and the positioning plate 500 is installed inside the recess 400 and has a predetermined positioning distance from the hitch portion 200. According to the locating plate 500 structure provided in this embodiment, the location of the locating plate 500 can be flexibly customized, so that when the trailer 200 is installed and connected with the rear vehicle, the locating plate 500 is just abutted with the rear vehicle sensor, and thus the information of the installed location is fed back to the operator in time, and the locating plate has an obvious technical effect in terms of safety protection.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims

1. A trailer hitch, comprising:

a welding part (100) which is a cylinder extending along a first direction, wherein the welding part (100) is used for welding with a front vehicle;

a pulling part (200) which is of a spherical structure and is arranged at intervals with the welding part (100);

The connecting part is provided with a first extending section (301) used for being connected with the welding part (100) and a second extending section (302) used for being connected with the pulling part (200), and a third extending section (303) connected with the first extending section (301) and the second extending section (302), wherein the third extending section (303) is of a linear structure extending along a second direction, and the cross sections of the second extending section (302) and the third extending section (303) are gradually reduced from one end close to the welding part (100) to one end close to the pulling part (200).

2. The trailer hitch of claim 1, further comprising:

the welding part (100) and the third extension section (303) are positioned in two planes which are intersected and have an included angle of 7 degrees.

3. The trailer hitch of claim 2, further comprising:

An included angle between a projection of the welding part (100) on a plane of the third extension section (303) and the third extension section (303) is 125 degrees.

4. The trailer hitch of claim 1, further comprising:

The second extension section (302) and the third extension section (303) have an included angle of 39 degrees.

5. The trailer hitch of claim 1, further comprising:

the cross section of the third extension section (303) is I-shaped.

6. The trailer hitch of claim 1, further comprising:

The first extension (301) is of cylindrical structure and a smooth transition of circular arc shape is provided between the first extension (301) and the weld (100).

7. The trailer hitch of claim 1, further comprising:

the second extension section (302) is of a cylindrical structure, the diameter of the second extension section (302) is smaller than that of the pulling part (200), and a circular arc-shaped smooth transition is formed between the second extension section (302) and the pulling part (200).

8. The trailer hitch of claim 1, further comprising:

The welding part (100), the pulling part (200) and the connecting part are of an integral forging structure.

9. The trailer hitch of claim 1, further comprising:

The third extension section (303) and the second extension section (302) are provided with grooves (400) which are integrally extended.

10. The trailer hitch of claim 9, further comprising:

The trailer straight hook further comprises a locating plate (500), wherein the locating plate (500) is installed inside the groove (400) and has a preset locating distance with the pulling part (200).