Front lower portion protection device

Abstract

The invention belongs to the technical field of commercial vehicle chassis protection devices, and particularly discloses a front lower portion protection device. The front lower portion protection device comprises T-shaped sheet metal part, a plastic cross beam and embedded bolts. The T-shaped sheet metal part and the embedded bolts are separately and fixedly disposed on two opposite sides of theplastic cross beam and are subjected to integrated injection molding with the plastic cross beam. The front lower portion protection device adopts a structure of which the T-shaped sheet metal part,the plastic cross beam and the embedded bolts are integrally injection-molded, and the T-shaped sheet metal part is directly injection-molded with the plastic cross beam. The structure is simple, andthe connection strength of the T-shaped sheet metal part and the plastic cross beam can be ensured, and damage caused by collision and cracking can be avoided. At the same time, the T-shaped sheet metal part is arranged on one side of the plastic cross beam, when colliding, the T-shaped sheet metal part can provide effective collision contact points to protect the plastic cross beam and prevent the plastic beam from being damaged by collision and cracking. Furthermore, the embedded bolts are directly injection-molded into the plastic cross beam, connecting pieces for installation do not need to be arranged, the mounting structure is simplified, the weight is reduced, and installation is facilitated.

Description

technical field [0001] The invention belongs to the technical field of commercial vehicle chassis protection devices, in particular to a front lower protection device. Background technique [0002] The front lower protective device of commercial vehicles refers to the special front lower protective device or the vehicle body, frame parts or other parts of the vehicle that can have the front lower protective function by virtue of its own shape and characteristics. According to the requirements of the commercial vehicle front lower protection regulations, the front lower protection device must have sufficient blocking force to resist vehicle collision. The specific requirements are that the three collision points P1, P2, and P3 on the front lower protective device need to have strengths of 50%, 100%, and 50% of the maximum total mass of the vehicle or the force of 16t, respectively (see "GB26511 Commercial Vehicle Front Lower Part" for detailed requirements in regulations) Pr...

AI Technical Summary

Problems solved by technology

[0004] The anti-collision beam assembly 01 in the prior art is formed by sheet metal stamping and welding. In order to ensure the anti-collision beam assembly 01 assembly, four pieces of sheet metal with the same length are usually welded to form a square anti-collision beam assembly. 01, not only has a complex structure, but also, when it is collided, the sheet metal welding part of the anti-collision beam assembly 01 is vulnerable to vibration and cracking, resulting in damage; at the same time, the welding on the anti-collision beam assembly 01 is used to fix and connect the frame 05 The connecting piece 04, when in use, with the vibration caused by the collision, the anti-collision beam assembly 01 and the connecting frame 05 are also prone to detachment

The above together reduce the service life of the anti-collision beam assembly 01 as a whole; The crossbeam assembly 01 reaches 30kg, and the left mounting support 02 and the right mounting support 03 both exceed 8kg, which are relatively heavy and increase the difficulty of assembly. In summary, the structure of the lower front protection device in the prior art is complex and easy to crack and damage , heavy weight, and difficult assembly. At the same time, due to the heavy weight of the front lower protective device in the prior art, the weight of the whole vehicle will be increased when used, and the fuel consumption of the car will be increased.

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