Novel tail crossbeam structure for full-load coach underframe

Abstract

The invention discloses a novel tail crossbeam structure for a full-load coach underframe and relates to the technical field of auto parts. The novel tail crossbeam structure comprises a tail crossbeam assembly, a compressor assembly and a water tank support assembly and is characterized in that a left suspension reinforcing plate and a right suspension reinforcing plate which are symmetrical to each other are arranged on the inner side of the tail crossbeam assembly, and the left suspension reinforcing plate and the right suspension reinforcing plate are respectively connected with the left longitudinal beam and the right longitudinal beam of the frame; the compressor assembly is assembled to the left side of the tail crossbeam assembly, and the water tank support assembly is assembled tothe right side of the tail crossbeam assembly. The novel tail crossbeam structure has the advantages that a traditional frame tail end structure is optimized, the Z-direction bending rigidity of a combined structure of a compressor support, a frame tail crossbeam and a water tank support and the torsional rigidity of the frame tail end are greatly increased, the Z-direction dynamic stiffness of the frame at a front suspension support is enhanced, the vibration isolation performance at a suspension position is increased, NVH performance is guaranteed effectively, and riding comfortableness isincreased.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to a novel tail beam structure for the underframe of a fully loaded passenger car. Background technique [0002] The frame is a frame structure spanning the front and rear axles of the car. It is generally composed of longitudinal beams and beams. The beams are used to ensure the torsional stiffness of the frame and bear longitudinal loads, and can also support the main components of the car. The automobile suspension bracket refers to the elastic connection part between the powertrain and the frame, and is one of the key paths for the vibration of the engine to be transmitted to the body. [0003] Such as figure 1 As shown, the Z-direction dynamic stiffness of the left and right front suspension brackets of the car at the engine idle frequency is mainly affected by the natural mode of the rear end of the frame near this frequency, and the mode shape of this mode is mainly shown...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a novel tail beam structure for the underframe of a full-load passenger car. The main purpose of the present invention is to solve the problem of low Z-direction rigidity and poor vibration isolation effect of the front suspension bracket caused by the unreasonable design of the tail end structure of the existing passenger car. NVH performance degradation, poor ride comfort, etc.

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