CN210083144U - Vehicle rear portion protector - Google Patents

Abstract

The utility model belongs to the technical field of export commercial car chassis, a vehicle rear portion protector is related to, including annular support, linking bridge and crossbeam assembly, its characterized in that, the crossbeam assembly is fixed with the side of two linking bridges, the upper end of two linking bridges is fixed with the lower extreme of an annular support respectively, the upper end of two annular supports is fixed with the left and right longerons of frame assembly afterbody respectively, the frame assembly afterbody is located on the vehicle chassis; the utility model discloses a back protector satisfies P2 point loading power and is 180kN, and P1, P3 point loading power are 100 kN's experimental requirement, have structural strength height, the quality is light, with low costs and simple to operate's advantage.

Description

A vehicle rear guard

technical field

The utility model relates to a vehicle rear protection device, which belongs to the technical field of export commercial vehicle chassis.

Background technique

In the rear-end collision of vehicles on the road, a considerable part of the situation is that a car collides with a large truck, resulting in heavy casualties for the occupants of the car. In order to prevent the occurrence of small vehicles colliding with large trucks, and to improve and improve the collision compatibility of the rear protection devices of trucks with other vehicles, the Economic Commission for Europe has made relevant legal regulations for automobiles, namely ECE R58-03 "Rear Lower Protection". Uniform Regulations for Authentication Devices. The new test loading requirements for the rear protection device are: (1) When loading at three points, the loading force at each point (ie points P1 and P3) is 100kN or the smaller value of 50% full load. (2) When loading at two points, the loading force at each point (ie point P2) is 180kN or the smaller value of 85% full load.

The loading requirements of the rear protective device of the existing export car are that the loading force of the three-point loading is 50kN or the smaller value of 25% of the full load, and the loading force of the two-point loading is the smaller value of 100kN or 50% of the full load, and the structural strength is low. , poor reliability.

SUMMARY OF THE INVENTION

The purpose of the utility model is to solve the problem of the existing export vehicle rear protection device, and propose a rear protection device with strong impact resistance, which can meet the test requirements that the loading force at the P2 point is 180kN, and the loading force at the P1 and P3 points is 100kN. The advantages of high structural strength, light weight, low cost and convenient installation.

In order to achieve the above technical purpose, the technical solution of the present utility model is: a vehicle rear protection device, comprising an annular bracket, a connecting bracket and a cross beam assembly, characterized in that the cross beam assembly is fixed to the side surfaces of the two connecting brackets The upper ends of the two connecting brackets are respectively fixed with the lower end of an annular bracket, and the upper ends of the two annular brackets are respectively fixed with the left and right longitudinal beams of the rear of the frame assembly, which is located on the vehicle chassis.

The beam assembly includes a beam, a reinforcing plate, and projection welding nuts. The number of the reinforcing plates is two, the edges of which are welded to the beam, and four first round holes are provided on the reinforcing plate. Welded in the first round hole on the reinforcing plate.

Further, the connecting support is a T-shaped support formed by welding a left connecting support and a right connecting support, and the left connecting support and the right connecting support are symmetrical on the left and right, and the welding position is the intersection of the large round hole in the middle of the T-shaped support;

Further, the left connecting bracket and the right connecting bracket are respectively provided with two second round holes, and the connecting bracket is fixed to the beam by a projection welding nut screwed into the first round hole by bolts through the second round hole.

Further, the lower end of the annular support is provided with two fourth circular holes, the upper end of the connecting support is provided with two third circular holes, the two fourth circular holes at the lower end of the annular support and the two fourth circular holes at the upper end of the connecting support. The third round hole is aligned and fixed by bolt assembly.

Further, the upper end of the annular bracket is provided with five fifth circular holes, and is screwed into the fifth circular holes through bolt assemblies to be fixedly connected to the left and right longitudinal beams at the rear of the frame assembly.

The utility model has the following advantages:

1) The rear protection device of the present utility model is verified in accordance with the ECE R58-03 regulations, and no fracture damage occurs during the entire loading process. 03 Relevant requirements of laws and regulations, high structural strength, firm and reliable, and good protection;

(2) The cross beam of the rear guard of the present utility model is formed by roll forming of a thin-walled metal plate with high specific strength, which is light in weight, high in material utilization rate and low in cost;

(3) The annular support of the utility model is cast by using ductile iron with high specific strength, which is a topology optimized structure, and achieves a weight reduction of 25% compared with sheet metal parts.

Description of drawings

FIG. 1 is an axial schematic view of the rear protection device of the present invention.

FIG. 2 is a schematic structural diagram of the rear protective beam assembly of the present invention.

FIG. 3 is a schematic structural diagram of A-A in FIG. 2 .

FIG. 4 is a schematic structural diagram of the rear protection left and right connecting bracket assemblies of the present invention.

FIG. 5 is a schematic structural diagram of the left and right annular brackets for rear protection of the present utility model (left and right symmetrical parts).

Reference numerals: 1, annular bracket; 1-1, fifth round hole; 1-2, fourth round hole; 2, connecting bracket; 2-1, left connecting bracket; 2-2, right connecting bracket; 2- 3, the third round hole; 2-4, the second round hole; 3, the beam assembly; 3-1, the beam; 3-2, the reinforcement plate; 3-3, the projection welding nut; 3-4, the first circle 4. The rear of the frame assembly.

Detailed ways

The utility model will be further described below in conjunction with the specific drawings and embodiments.

As shown in FIG. 1 , a vehicle rear protection device in this embodiment 1 includes an annular bracket 1 , a connecting bracket 2 and a beam assembly 3 , and the beam assembly 3 is fixed to the sides of the two connecting brackets 2 , The upper ends of the two connecting brackets 2 are respectively fixed with the lower end of an annular bracket 1 , and the upper ends of the two annular brackets 1 are respectively fixed with the left and right longitudinal beams of the rear part 4 of the frame assembly, which is located in the vehicle. on the chassis.

As shown in FIG. 2 , the beam assembly 3 includes a beam 3-1, a reinforcing plate 3-2, and a projection welding nut 3-3. The number of the reinforcing plates 3-2 is two, and the edges of the reinforcing plates 3-2 are welded on the beam 3-2. 1. There are four first round holes 3-4 on the reinforcing plate 3-2, and the projection welding nuts 3-3 are welded in the first round holes 3-4 on the reinforcing plate 3-2; The cross-section size of the beam 3-1 is 120x90mm and the thickness is 3mm. The material is made of a metal plate with high specific strength, which is formed by roll pressing. The yield strength reaches 700MPa, and the structural strength is high.

As shown in FIG. 3 , the connection bracket 2 is a T-shaped bracket formed by welding a left connection bracket 2-1 and a right connection bracket 2-2. The left connection bracket 2-1 and the right connection bracket 2-2 are symmetrical on both sides, And the welding position is the intersection of the large round hole in the middle of the T-shaped bracket;

The upper end of the connecting bracket 2 is provided with two third round holes 2-3, the left connecting bracket 2-1 and the right connecting bracket 2-2 are respectively provided with two second round holes 2-4. 2. The projection welding nut 3-3 screwed into the first round hole 3-4 through the bolt through the second round hole 2-4 is fixed to the beam 3-1.

As shown in FIG. 4 , the lower end of the annular support 1 is provided with two fourth round holes 1 - 2 . The three circular holes 2-3 are aligned, and are connected and fixed by bolt assemblies; the upper end of the annular bracket 1 is provided with five fifth circular holes 1-1, which are screwed into the fifth circular holes 1-1 and the vehicle through the bolt assembly. The left and right longitudinal beams of the rear part 4 of the frame assembly are fixedly connected; the material of the annular bracket 1 is made of ductile iron QT800-2, the tensile strength reaches 800MPa, and the strength is high; the structure is a topology optimized structure, which reduces the weight by 25% compared with sheet metal parts ,light in mass.

The rear protection device of the utility model is tested on a rigid platform. When loading at three points, the point P1 is 975mm away from the vertical plane of the longitudinal centerline of the vehicle, and the point P3 is 0mm away from the vertical plane of the longitudinal centerline of the vehicle. The loading force is loaded from 0kN to 10kN When the force is applied at points P1 and P3, the horizontal displacement is 52mm and 14mm respectively; when the two points are loaded, the distance between point P2 and the vertical plane of the longitudinal center line of the vehicle is 580mm, and the horizontal displacement at the force-applying point is 29mm. It meets the requirements of ECE R58-03 regulations; the utility model has high structural strength, firmness and reliability, low production cost, convenient installation, obvious weight reduction effect of beams and brackets, and realizes light weight.

The present invention and its embodiments have been described above, and the description is not limiting, and what is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it, without departing from the purpose of the present invention, and without creatively designing the structural modes and embodiments similar to the technical scheme, all should belong to the protection of the present invention. scope.

Claims (6)

1. A rear protection device for a vehicle, comprising an annular bracket (1), a connecting bracket (2) and a cross beam assembly (3), characterized in that the cross beam assembly (3) and two connecting brackets (2) The upper ends of the two connecting brackets (2) are respectively fixed with the lower end of an annular bracket (1), and the upper ends of the two annular brackets (1) are respectively connected with the left and right longitudinal beams of the rear part (4) of the frame assembly. Fixed, the rear part (4) of the frame assembly is located on the vehicle chassis. 2. A vehicle rear protection device according to claim 1, characterized in that: the beam assembly (3) comprises a beam (3-1), a reinforcing plate (3-2), a projection welding nut (3) -3), the number of the reinforcing plates (3-2) is two, the edges of which are welded to the beam (3-1), and the reinforcing plates (3-2) are provided with four first round holes (3 -4), the projection welding nut (3-3) is welded in the first round hole (3-4) on the reinforcing plate (3-2). 3 . The vehicle rear protection device according to claim 2 , wherein the connecting bracket ( 2 ) is formed by welding a left connecting bracket ( 2-1 ) and a right connecting bracket ( 2-2 ). 3 . A zigzag bracket, the left connecting bracket (2-1) and the right connecting bracket (2-2) are symmetrical on the left and right, and the welding position is the intersection of the large round holes in the middle of the T-shaped bracket. 4 . The vehicle rear protection device according to claim 3 , wherein the left connecting bracket ( 2 - 1 ) and the right connecting bracket ( 2 - 2 ) are respectively provided with two second round holes ( 4 . 2-4), the connecting bracket (2) is screwed into the projection welding nut (3-3) and the beam (3) in the first circular hole (3-4) through the bolt through the second circular hole (2-4) -1) Fixed. 5. A vehicle rear protection device according to claim 1, characterized in that: the lower end of the annular bracket (1) is provided with two fourth round holes (1-2), the connecting bracket (2) ) are provided with two third round holes (2-3) at the upper end, the two fourth round holes (1-2) at the lower end of the annular bracket (1) and the third round hole (2) at the upper end of the connecting bracket (2) -3) The two are aligned and fixed by bolt assembly connection. 6. A vehicle rear protection device according to claim 1, characterized in that: the upper end of the annular bracket (1) is provided with five fifth circular holes (1-1), which are screwed in through a bolt assembly The fifth round hole (1-1) is fixedly connected with the left and right longitudinal beams of the rear part (4) of the frame assembly.

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