Novel crushable energy absorption type engine cover lock catch structure and design method

Abstract

The invention relates to a novel crushable energy absorption type engine cover lock catch structure and a design method. The novel crushable energy absorption type engine cover lock catch structure comprises a lock catch crushable base plate, a lock catch body and a lock catch rotatable buckle. The lock catch crushable base plate is welded and fixed with the front end of an engine cover inner plate, the lock catch rotatable buckle is welded and fixed with the rear end of the engine cover inner plate, one end of the lock catch body is connected with the lock catch crushable base plate, and the other end of the lock catch body is connected with the lock catch rotatable buckle to form the engine cover lock catch structure. A weakening groove is formed in the position, close to the bottom, of the lock catch crushable base plate, a second buckle mounting hole is formed in the lock catch rotatable buckle, and a weakening hole is formed in the connecting position of the second buckle mounting hole and the lock catch body. By means of deformation and rotating energy absorption of the weakening groove and the weakening hole, impact acceleration is reduced, the injury degree of the head of a pedestrian when the pedestrian is hit by an automobile engine cover can be effectively reduced, the overall structure is simple, the lock catch collapsible base plate and the lock catch rotatable buckle are integrally formed through a metal plate stamping technology, and the manufacturing cost is low.

Description

technical field [0001] The patent of the present invention relates to the technical field of automobile engine cover lock structure design, in particular to a novel crushable energy-absorbing engine cover lock structure and its design method. Background technique [0002] With the increasing production and sales of automobiles and frequent collisions between automobiles and pedestrians or non-motor vehicle drivers, manufacturers and consumers have increasingly stringent requirements for pedestrian protection. At present, C-NCAP has introduced pedestrian protection test specifications in 2018, and the national standard of the People's Republic of China GB / T 24550 "Collision Protection of Vehicles to Pedestrians" is currently being revised and will become a mandatory standard. Overseas regulations such as European ECE127 and international standard GTR And overseas NCAPs have already introduced pedestrian protection assessment. Nowadays, manufacturers pay more and more attenti...

AI Technical Summary

Problems solved by technology

The traditional cover lock is a solid U-shaped structure with a circular cross section. In order to ensure the locking reliability of the cover, it is usually designed with extremely high strength and cannot be deformed.

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