Active extension type automobile front bumper

Abstract

The invention discloses an active extension type automobile front bumper. Three fixed sleeves are rigidly connected to the rear side wall of a cross beam of a U-shaped fixed frame, an impact rod is sleeved in the middle of the interior of each fixed sleeve in a spaced mode, and the front end of each impact rod penetrates through the cross beam of the U-shaped fixed frame and then is fixedly connected with a bumper body; the rear end of each impact rod is fixedly connected with a movable cross beam horizontally arranged left and right, a left longitudinal beam and a right longitudinal beam of the U-shaped fixed frame are each provided with a movable longitudinal beam capable of moving front and back, and the left end and the right end of each movable cross beam extend into the correspondingleft longitudinal beam and the corresponding right longitudinal beam of the U-shaped fixed frame respectively and are fixedly connected with the front end of the corresponding movable longitudinal beam. The rear end of each movable longitudinal beam is fixedly connected with a hydraulic mechanism. An energy absorption mechanism is arranged between every two adjacent fixed sleeves, the distance between the bumper body and an automobile body is changed through an active extension mechanism and the energy absorption mechanisms, and high-strength springs, the energy absorption mechanisms and thehydraulic mechanisms absorb energy generated during collision in a multi-stage energy absorption mode.

Description

technical field [0001] The invention relates to the technical field of automobile bumpers, in particular to an active extension type automobile front bumper. Background technique [0002] The bumper is an essential safety device for a car. Its function is to absorb and buffer external impact and protect the body from direct impact. The current automobile bumper is composed of three parts: the outer plate, the buffer material and the beam. The outer plate and the buffer material are made of plastic, and the beam is stamped with a cold-rolled sheet to form a U-shaped groove. The outer plate and the buffer material are attached to the beam. , although the energy absorption effect of the bumper is getting stronger and stronger, it is rigidly connected to the frame. During the collision, only passive buffer energy absorption is performed and the buffer distance is short. When a large collision occurs, It utilizes the deformation of the bumper to absorb energy so that the ability...

AI Technical Summary

Problems solved by technology

The current automobile bumper is composed of three parts: the outer plate, the buffer material and the beam. The outer plate and the buffer material are made of plastic, and the beam is stamped with a cold-rolled sheet to form a U-shaped groove. The outer plate and the buffer material are attached to the beam. , although the energy absorption effect of the bumper is getting stronger and stronger, it is rigidly connected to the frame. During the collision, only passive buffer energy absorption is performed and the buffer distance is short. When a large collision occurs, It uses the deformation of the bumper to absorb energy to resist impacts, and the cushioning effect is not good. There is still a large impact energy that will be transmitted to the body, causing greater damage to the occupants of the vehicle.

At present, extending the distance between the bumper and the frame and increasing the buffering capacity of the bumper can be regarded as an effective method to improve the safety performance of the bumper. The scheme can increase the buffer distance of the bumper, but it needs to adjust the buffer gap by pre-operating the rotary handle. Due to the limitation of the vehicle distance, the bumper cannot be extended to the maximum extent, and the normal state of the bumper and the working room cannot be realized. Switching, and no additional energy-absorbing device, the energy-absorbing effect of the bumper is not good

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