Rear axle mass shock absorber

Abstract

The invention discloses a rear axle mass shock absorber and relates to a shock absorber. The rear axle mass shock absorber comprises a screw, mass inertia blocks, vibration absorption rubber and a mounting bracket. The mounting bracket is formed by a bottom plate and a vertical plate; the vertical plate is provided with a limiting hole; the mass inertia blocks are respectively arranged on both sides of the vertical plate; each mass inertia block is provided with a center round hole; the mass inertia blocks are connected with the vertical plate by the vibration absorption rubber in a vulcanizing manner; the screw is sleeved by a gasket, a nut and a buffer rubber sleeve; the screw passes through the center round holes of the mass inertia blocks, the vibration absorption rubber and the limiting hole of the vertical plate and enables the buffer rubber sleeve to be positioned in the limiting hole of the vertical plate; the two mass inertia blocks, the two pieces of vibration absorption rubber and the vertical plate are locked together by the gasket and the nut, so that lateral compression or stretching deformation of the vibration absorption rubber can be regulated. According to the rear axle mass shock absorber, vibration noise can be reduced; after the rubber is vulcanized and formed, rigidity can be freely regulated; safety performance is good; NVH (Noise Vibration and Harshness) performance of a vehicle can be improved; the development period of the vehicle or the shock absorber product is shortened; the rear axle mass shock absorber is easy to popularize and apply.

Description

technical field [0001] The invention relates to a shock absorber, in particular to a rear axle mass shock absorber. Background technique [0002] With the continuous improvement of automobile ride comfort and noise requirements, solving the vibration and noise problem of the rear drive axle of automobiles has become the main research content of NVH engineers in the domestic automobile industry. There are many reasons for the vibration and noise of the rear drive axle. The main reason is that the vibration of the unbalanced inertial force of the engine crankshaft is transmitted through the torsional vibration of the drive shaft, and the coupling resonance with the vibration of the unsprung mechanism and tires occurs at or near the rear axle. Under the existing conditions, installing a mass shock absorber on the rear drive axle is a more economical and effective means to reduce or eliminate the vibration and noise of the rear axle. [0003] Design and control the natural fr...

AI Technical Summary

Problems solved by technology

However, this structural scheme also has obvious deficiencies. First, the structure is relatively complex, requiring relatively many parts and manufacturing processes, and several rubber parts are required to be vulcanized separately (such as upper and lower limit rubber blocks, working rubber blocks vulcanization), welding (such as installation Second, the rigidity of the rubber after vulcanization cannot be adjusted, and unqualified products cannot be effectively reworked and repaired, and cannot 100% meet the natural frequency requirements. The cost is high, and there are limitations in popularization and use.

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