Passenger car rollover collision energy absorbing structure

Abstract

The invention belongs to the technical field of passenger car rollover collision safety, and particularly relates to a passenger car rollover collision energy absorbing structure with high efficiencyand reasonable energy absorbing characteristics in rollover collision. The structure comprises a diagonal bracing beam, a curved beam, a first energy absorbing box, a second energy absorbing box, a third energy absorbing box and a fourth energy absorbing box, various components of each structure are connected by welding, and the diagonal bracing beam and the curved beam adopt hollow steel pipes shaped like the Chinese character 'ri'. The first, second, third and fourth energy absorbing boxes are composed of thin-walled trapezoidal steel tubes with rectangular sections. In order to accurately control an energy absorbing mode and a maximum load carrying capacity during axial crushing, trapezoidal induction grooves are formed in a pipe wall, the induction grooves are only formed in two wide planes symmetrical about central axes of the energy absorbing boxes, and the induction grooves are not formed in the other two planes. The invention is the high-efficiency energy absorbing structure specially used for collision energy absorbing in the rollover process of a passenger car so as to minimize the collision energy transmitted to survival space of occupants, and the safety of the occupants is protected.

Description

technical field [0001] The invention belongs to the technical field of passenger car rollover collision safety, in particular to a passenger car rollover collision energy absorbing structure with high efficiency and reasonable energy absorption characteristics in the rollover collision. Background technique [0002] With the construction of expressways and the rapid development of road transportation, road traffic accidents have become the main cause of heavy casualties, serious economic losses and strong social repercussions. Among them, the passenger car rollover collision accident is recognized as the chief culprit causing heavy casualties and economic losses. Existing passenger car framework is composed of 6 large pieces of structure (left and right side enclosure structure, front and rear enclosure structure, top cover structure and underframe structure), and the six parts are connected by welding, among which the left and right side enclosure framework and The joint o...

AI Technical Summary

Problems solved by technology

[0003] (1) During the rollover collision process of the existing passenger car structure, the energy is mainly absorbed through the bending deformation of the side pillars and roof beams that constitute the closed ring structure. This inefficient energy absorption method leads to excessive deformation of the side pillars and Invade the living space and seriously threaten the safety of passengers

[0004] (2) In order to meet the requirements for the strength of the upper structure of the passenger car stipulated in the regulations, the strength of the closed ring structure of the existing passenger car is greatly enhanced to ensure that the living space of the occupants is not invaded. However, due to the unreasonable matching of the structural strength, the acceleration during the collision Larger and cause more damage to occupants

In addition, due to the increase in structural strength, the overall vehicle mass, center of gravity height and manufacturing cost will increase

The Chinese patent authorization announcement number is: CN105383569A, and the authorization announcement date is: March 9, 2016. The invention patent discloses a double gradient strength passenger car column structure. Ensure that the collision force of the key components of the closed-loop structure of the bus matches the strength of the corresponding positions during the rollover process of the bus, so that the force on each part of the side wall of the bus is more uniform, and avoiding excessive plastic deformation of the side wall of the bus and invading the living space , but the collision energy is mainly absorbed by the bending deformation of the closed ring structure, which does not improve the energy absorption efficiency of the structure and reduce the peak acceleration during collision;

[0005] (3) The energy transfer path of the existing passenger car structure is unreasonable and the energy absorption efficiency is low during the rollover collision process

In order to solve this problem, part of the bus frame structure is equipped with a closed ring reinforcement structure. For example, the Chinese patent authorization announcement number is: CN202806893U, and the authorization announcement date is: a utility model patent on March 20, 2013 discloses a closed ring reinforcement structure for tourist buses. structure, in order to increase the rigidity of the closed ring structure during the rollover process and reduce the deformation of the bus structure during the rollover process, but these methods still reduce the deformation by increasing the strength, and do not fundamentally reduce the incoming The energy of the living space, but also increases the mass of the vehicle

[0006] (4) The existing passenger car structure does not have a special rollover collision energy-absorbing structure, which causes the collision energy to be directly transmitted to the passenger car structure, resulting in large deformation or high collision acceleration of the passenger car structure, which in turn causes damage to the occupants in the car

In order to solve this problem, some patents have proposed a method of adding an energy-absorbing structure to the side window column of a passenger car. For example, the Chinese patent authorization announcement number is: CN105172899A, and the authorization announcement date is: The invention patent on December 23, 2015 discloses a passenger car The energy-absorbing window column assembly, this structure can absorb a certain amount of energy and reduce the deformation of the window column, but due to the low efficiency and low energy absorption of this energy-absorbing method, it cannot effectively restrain the energy from entering the living space

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