Energy absorbing type rear protection device capable of automatically adjusting height

Abstract

The invention provides an energy absorbing type rear protection device capable of automatically adjusting height. The energy absorbing type rear protection device capable of automatically adjusting the height comprises two ground clearance detection mechanisms, two 4-shaped brackets, a transmission mechanism, B-shaped cross beams and energy absorbing units; the two 4-shaped brackets are symmetrically mounted on the external side surfaces of two longitudinal beams at the tail part of a commercial vehicle; the two 4-shaped brackets are connected with each other through the transmission mechanism; the B-shaped cross beams are connected to the end surfaces, facing the vehicle tail, of the 4-shaped brackets through the energy absorbing units; the two ground clearance detection mechanisms are correspondingly connected to the internal sides of the two longitudinal beams at the tail part of the commercial vehicle through connecting pins; each ground clearance detection mechanism comprises a connecting head, a connecting rod and a plate with a universal wheel; the connecting heads are mounted on the internal sides of the longitudinal beams at the tail part of the commercial vehicle throughconnecting pins; and the connecting heads can rotate around the connecting pins. According to the energy absorbing type rear protection device capable of automatically adjusting the height, the obstacle crossing ability is realized, collision energy can be stably absorbed stage by stage, the rigidity in the height direction is distributed in a graded manner, and an automobile suffering rear-end collision can be effectively prevented from getting to the bottom of a truck.

Description

technical field [0001] The invention relates to the technical field of rear protective devices for commercial vehicles, in particular to an energy-absorbing rear protective device with automatic height adjustment. Background technique [0002] In the mixed traffic mode in my country, the accident rate of car rear-end collision with truck is relatively high, and because the compatibility between the two is extremely bad, the collision consequences are more serious, and because the front end height of small passenger cars is lower than that of commercial vehicles Therefore, in the event of a rear-end collision accident, small passenger cars can easily get into the bottom of commercial vehicles, and rear-end cars often cause car crashes and fatalities. Most of the existing commercial vehicle rear lower protective devices are fixed, directly rigidly connected with the frame, and the vehicle passability is poor; some use mechatronics technology to ensure the safety of the rear veh...

AI Technical Summary

Problems solved by technology

[0002] In the mixed traffic mode in my country, the accident rate of car rear-end collision with truck is relatively high, and because the compatibility between the two is extremely bad, the collision consequences are more serious, and because the front end height of small passenger cars is lower than that of commercial vehicles In the event of a rear-end collision accident, small passenger cars can easily get into the bottom of commercial vehicles, and rear-end cars are often the result of car crashes and fatalities.

Most of the existing commercial vehicle rear lower protective devices are fixed, directly rigidly connected with the frame, and the vehicle passability is poor; some use mechatronics technology to ensure the safety of the rear vehicle in the event of a collision, and can improve the safety of the vehicle itself. Passability ensures that the rear protection device will not be damaged when the vehicle is running normally

At present, the adjustable rear protective device based on mechatronics has high cost and heavy weight, and is not suitable for wide-scale popularization and promotion; at the same time, the existing rear protective device is relatively rigid, and the energy during the collision process is almost completely absorbed by the car. Absorption, resulting in deformation of the car, lower survival rate inside the car

Images