Connecting structure of front longitudinal beam and front floor longitudinal beam of automobile

Abstract

The invention discloses a connecting structure of a front longitudinal beam and a front floor longitudinal beam of an automobile, which comprises the front longitudinal beam, a connecting plate and the front floor longitudinal beam which are welded in turn; and the front part of a connecting plate reinforcing groove is lapped with the tail of the front longitudinal beam, while the rear part is lapped with a groove-shaped front floor longitudinal beam. The connecting structure is characterized in that: the groove on the lapped part of the front longitudinal beam and the connecting plate is welded with a root reinforced piece; groove-shaped floor beam reinforcing pieces are overlapped on the rear part of the groove back of the connecting plate reinforcing groove; the rear parts of the groove-shaped floor beam reinforcing pieces are overlapped and lapped with the groove back of the front floor longitudinal beam; and the lateral surface of the tail of the front longitudinal beam is welded with strip shield-shaped floor beam front end reinforcing pieces of which the rear parts are welded with the connecting plate reinforcing groove and the outer side wall of the front floor longitudinal beam groove. The connecting structure can make the front longitudinal beam and the front floor longitudinal beam of the automobile connected firmly; and the capacity of the connecting structure of bearing impact load is improved, and the connecting part cannot be broken and scattered even if the connecting structure bears large impact load.

Description

technical field [0001] The invention relates to an automobile body structure, and more specifically relates to a connection structure between an automobile front longitudinal beam and a front floor longitudinal beam. Background technique [0002] When a car collides accidentally, it is required that the body of the car has a good energy absorption effect to ensure the living space of the driver and passengers to the greatest extent, and minimizing the deformation of the cab is the most basic requirement. The front longitudinal beam of the car is located on both sides of the front of the car body. It is the main component of the cabin and load bearing. It bears the longitudinal force of the car body and transmits the longitudinal force to other parts such as the floor. The front longitudinal beam absorbs and attenuates the impact energy through twisting and deformation. At the same time, part of the force will also be transmitted to the floor beams. The front floor longitudi...

AI Technical Summary

Problems solved by technology

The front floor longitudinal beam and the front longitudinal beam are overlapped and welded through the connecting plate. One side of the connecting plate is a reinforcement groove extending along the front and rear direction of the vehicle body. , the rear end overlaps with the trough-shaped front floor longitudinal beam. Since the three are connected by welding, the joint becomes a weak area. When subjected to impact load, it is easy to break, and the effective energy absorption effect cannot be achieved, causing damage to the occupants.

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