Rear traction device of semi-trailer tractor

Abstract

The utility model relates to the technical field of traction devices, in particular to a rear traction device of a semi-trailer tractor, which comprises a cross beam, the cross section of the cross beam is of a C-shaped opening structure with an opening on one side, a trailer hook is arranged in the middle of the cross beam, and an upper connecting beam and a lower connecting beam are respectively arranged on the upper portion and the lower portion of two sides of the cross beam. Longitudinal beams are installed on one side of the upper connecting beam and one side of the lower connecting beam, and the longitudinal beams are oppositely arranged in parallel. The rear traction device of the semi-trailer tractor has the advantages of being high in assembly efficiency, simple in structure, easy in material forming, small in occupied space and free of influence on arrangement of other systems of a chassis.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of traction device especially a kind of semi-trailer tractor rear traction device. BACKGROUND

[0002] With the rapid development of China's economy, highway transportation has become the main transportation mode in China. As the main equipment of highway transportation, semi-trailer tractor is widely used due to its professionalization, large loading capacity and fast transportation. The semi-trailer tractor head generally does not have rear traction capability or has limited traction capability. However, with the increasing use of semi-trailer tractor in China and the demand of foreign export vehicle customers, semi-trailer tractor needs to have the ability to tow its own weight traction force.

[0003] The existing tractor rear traction device adopts a back-to-back groove beam reinforced tail cross beam structure or increases a second cross beam on the tail cross beam to transfer the towing force of the rear traction hook. This structure is complex, difficult to form materials, difficult to assemble, increases the overall vehicle weight and cost, and occupies a large space, affecting the layout of other systems of the chassis. SUMMARY

[0004] The technical problem to be solved by the utility model is to solve the problems in the above background technology. The utility model provides a semi-trailer tractor rear traction device, which has the advantages of high assembly efficiency, simple structure, easy material forming, small space occupation and no influence on the layout of other systems of the chassis, and is convenient for widespread promotion and use.

[0005] The utility model adopts the technical scheme to solve the technical problem: a semi-trailer tractor rear traction device, comprising a cross beam, the cross beam is in a C-shaped opening structure with one side open, a trailer hook is installed in the middle of the cross beam, an upper connecting beam and a lower connecting beam are installed on the upper part and the lower part of the two sides of the cross beam respectively, a longitudinal beam is installed on one side of the upper connecting beam and the lower connecting beam, and the longitudinal beams are arranged opposite and parallel to each other.

[0006] Further limitation, in the above technical solution, the longitudinal beam is in a C-shaped opening structure with one side open, and an inner web is installed on the inner side of the longitudinal beam. This design can enhance the overall connection strength through the inner web.

[0007] Further limitation, in the above technical solution, a wire hole is formed at the opposite position on the end face of the longitudinal beam and the end face of the inner web. This design is convenient for the connection of cable.

[0008] Further limitation, in the above technical solution, a trailer hook mounting hole is formed in the middle of the inner side of the cross beam, and a weight-reducing hole is formed on the two sides of the trailer hook mounting hole. This design reduces the self-weight and improves the overall installation convenience.

[0009] Further, in the technical scheme, the inner middle part of the cross beam is further provided with a vertical beam; the vertical beam can improve the mounting strength of the trailer hook.

[0010] Further, in the technical scheme, the upper end of the cross beam is in an inclined structure, and the lower end of the cross beam is in a horizontal structure; such a design can satisfy that the semi-trailer does not interfere with the main trailer when the semi-trailer is inclined, and the main cross section structure is inclined at the upper end and horizontal at the lower end, the upper wall edge middle region is designed to be lightened, and stress concentration is eliminated through a circular arc transition.

[0011] Further, in the technical scheme, the upper end of the cross beam is in an inclined structure, and the lower end of the cross beam is in a horizontal structure; such a design can satisfy that the semi-trailer does not interfere with the main trailer when the semi-trailer is inclined, and the main cross section structure is inclined at the upper end and horizontal at the lower end, the upper wall edge middle region is designed to be lightened, and stress concentration is eliminated through a circular arc transition.

[0012] Further, in the technical scheme, the two ends of the cross beam are provided with lightening notches.

[0013] Further, in the technical scheme, the upper connecting beam and the lower connecting beam are both in L-shaped structures.

[0014] The semi-trailer rear traction device has the advantages of high assembly efficiency, simple structure, easy material forming, small space occupation, no influence on the arrangement of other systems of the chassis, and the like, and is convenient to widely popularize and use. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0016] Figure 1 is a structural schematic view of the present application;

[0017] Figure 2 is Figure 1 an exploded structural schematic view of the present application;

[0018] Figure 3 is Figure 1 a top view structural schematic view of the present application;

[0019] Figure 4 is Figure 3 a structural schematic view of A direction in the present application;

[0020] Figure 5 is Figure 1 a structural schematic view of the cross beam in the present application Figure 1;

[0021] Figure 6 is Figure 1 structure diagram of the middle cross beam Figure 2 ;

[0022] Figure 7 is Figure 5 structure diagram of the side of the middle cross beam

[0023] Figure 8 is Figure 1 structure diagram of the upper connecting beam Figure 1 ;

[0024] Figure 9 is Figure 1 structure diagram of the upper connecting beam Figure 2 ;

[0025] Figure 10 is Figure 1 structure diagram of the lower connecting beam

[0026] Figure 11 is Figure 1 structure diagram of the vertical beam

[0027] The reference signs in the drawings are: 1, cross beam, 2, trailer hook, 3, upper connecting beam, 4, lower connecting beam, 5, vertical beam, 6, inner web, 7, threading hole, 8, trailer hook mounting hole, 9, weight reduction hole, 10, vertical beam, 11, weight reduction notch, 12, upper arm arc transition. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical schemes and beneficial effects solved by the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and do not limit the utility model.

[0029] In the present application, one side of the inner web 6 is tightly connected with the vertical beam 5, and the other side of the inner web 6 is tightly connected with the upper connecting beam 3 and the lower connecting beam 4 respectively.

[0030] In the present application, Figure 2 The dashed line in the above formula indicates the assembly sequence.

[0031] See Figures 1-11 As shown in the figure, the rear traction device of the semi-trailer tractor includes a cross beam 1, the cross beam 1 is in a C-shaped opening structure with one side opening, a trailer hook 2 is installed in the middle of the cross beam 1, an upper connecting beam 3 and a lower connecting beam 4 are installed on the upper part and the lower part of the two sides of the cross beam 1 respectively, a vertical beam 5 is installed on one side of the upper connecting beam 3 and the lower connecting beam 4, and the vertical beams 5 are arranged oppositely and in parallel.

[0032] The longitudinal beam 5 is in a C-shaped opening structure with one side open, and the inner web 6 is installed inside the longitudinal beam 5. Thread holes 7 are formed on the end faces of the longitudinal beam 5 and the end face of the inner web 6 in opposite positions. A trailer hook mounting hole 8 is formed in the middle of the inner side of the cross beam 1, and a weight reduction hole 9 is formed on both sides of the trailer hook mounting hole 8. A vertical beam 10 is also provided in the middle of the inner side of the cross beam 1. The upper end of the cross beam 1 is in an inclined structure, and the lower end of the cross beam 1 is in a horizontal structure. The upper connecting beam 3 is inclined downward on one side near the cross beam 1, and is horizontal on the other side. A weight reduction notch 11 is provided at both ends of the cross beam 1. The cross section of the upper connecting beam 3 and the cross section of the lower connecting beam 4 are both in an L-shaped structure.

[0033] In this application, the inner web 6 is a high-strength steel plate with a mechanical property not less than 610L material and a thickness not less than the frame longitudinal beam 5. The inner web 6 is installed inside the frame longitudinal beam 5 to strengthen the frame longitudinal beam 5, so as to ensure that the left and right longitudinal beams 5 of the frame have sufficient strength and rigidity to meet the rear traction capacity. The inner web 6 and the frame longitudinal beam 5 are provided with a plurality of circular holes with a diameter of 50 mm to meet the through-hole requirements of the chassis wire harness.

[0034] The overall cross-sectional shape of the cross beam 1 is C-shaped, the material is 610L, and the thickness is 8 mm. In order to meet the requirement that the semi-trailer does not interfere with the main trailer when it is inclined forward, the main cross-sectional structure is inclined at the upper end and horizontal at the lower end, and the edge of the upper wall is designed to be reduced in weight in the middle region, and the stress concentration is eliminated through an upper arm circular arc transition 12. The cross beam 1 is provided with a plurality of weight reduction holes with a diameter of 60 mm or more, and a plurality of trailer hook mounting holes 8 with a diameter of 17 mm are uniformly arranged around the middle weight reduction hole 9. The cross beam 1 is designed with a weight reduction notch 11 on both sides to meet the rear traction strength and at the same time to design the cross beam 1 to be lightweight

[0035] A plurality of mounting holes with a diameter of 15 mm are arranged on both sides of the upper wall and the lower wall of the cross beam 1, which facilitates the connection with the upper connecting beam 3 and the lower connecting beam 4. A vertical beam 10 is welded to the inner side of the cross beam 1, the material of the vertical beam 10 is 610L, the thickness is 8 mm, and the cross-sectional shape is C-shaped. The vertical beam 10 has a weight reduction hole in the middle, and the diameter of the weight reduction hole is 10 mm larger than that of the weight reduction hole of the cross beam, which facilitates the welding with the cross beam 1. The side wall edge of the vertical beam 10 is provided with a transition circular arc at the middle position, and the edge is 40 mm away from the lower wall edge of the cross beam, reserving space for wire harness arrangement.

[0036] The upper connecting beam 3 is formed by integral stamping process, the material is 610L, and the thickness is 8 mm. It meets the requirement that the semi-trailer does not interfere with the main trailer when it is inclined forward, and the upper connecting beam 3 is designed with a horizontal front end and an inclined rear end, and the horizontal angle of the rear end is 10°. The lower connecting beam 4 is formed by integral stamping process, the material is 610L, and the thickness is 8 mm. The lower wall edge is increased with a weight reduction circular arc transition.

[0037] In the application, the trailer hook assembly comprises a trailer hook, a pin shaft, a cotter pin, is installed on the cross beam 1 through fasteners, and is convenient to disassemble. The inner web plate 6 is a high-strength steel plate, and the thickness is not less than that of the frame longitudinal beam 5, and is installed on the inner side of the frame longitudinal beam 5. The frame longitudinal beam 5 and the inner web plate 6 are provided with a plurality of wire holes, so that the chassis wire harness can pass through the middle of the longitudinal beam 5. The cross beam 1 adopts a stamping forming process, and the cross section structure is C-shaped, the upper end is inclined, and the lower end is horizontal. The upper wall edge and the web surface are designed to be lightweight. The vertical beam 10 is welded on the inner side of the cross beam 1, and plays a reinforcing role on the cross beam 1 during traction. The vertical beam weight reduction hole is concentric with the cross beam weight reduction hole, and the diameter is 10mm larger than that of the cross beam 1, so as to facilitate welding. The distance between the side edge of the vertical beam 10 and the lower wall edge of the cross beam 1 is 40mm, and a wire harness passing space is left. The upper connecting beam 3 adopts a stamping forming process, the upper end is horizontal, the rear end is inclined, and the horizontal angle of the rear end is 10°.

[0038] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art, according to the technical scheme and the inventive concept of the present application, can make equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A rear towing device for a semi-trailer tractor, characterized in that: The device includes a crossbeam with a C-shaped opening on one side. A trailer hook is installed in the middle of the crossbeam. Upper and lower connecting beams are installed on the upper and lower sides of the crossbeam, respectively. A longitudinal beam is installed on one side of the upper and lower connecting beams. The longitudinal beams are arranged opposite each other and parallel to each other.

2. The semi-trailer tractor rear towing device according to claim 1, characterized in that: The longitudinal beam has a C-shaped opening structure with one side open, and an inner web is installed on the inner side of the longitudinal beam.

3. The semi-trailer tractor rear towing device according to claim 1, characterized in that: Threading holes are provided at relative positions on the end faces of the longitudinal beams and the inner web plates.

4. The semi-trailer tractor rear towing device according to claim 1, characterized in that: A trailer hitch mounting hole is provided in the middle of the inner side of the crossbeam, and weight reduction holes are provided on both sides of the trailer hitch mounting hole.

5. A semi-trailer tractor rear towing device according to claim 1, characterized in that: A vertical beam is also provided in the middle of the crossbeam.

6. A semi-trailer tractor rear towing device according to claim 1, characterized in that: The upper end of the crossbeam is inclined, and the lower end of the crossbeam is horizontal.

7. A semi-trailer tractor rear towing device according to claim 1, characterized in that: The upper part of the upper connecting beam has a downward sloping structure on the side near the crossbeam, while the other side of the upper connecting beam has a horizontal structure.

8. A semi-trailer tractor rear towing device according to claim 1, characterized in that: Both ends of the crossbeam are provided with weight-reduction notches.

9. A semi-trailer tractor rear towing device according to claim 1, characterized in that: Both the upper connecting beam and the lower connecting beam have an L-shaped cross-section.

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