Torsion-resistant suspension structure of power assembly

Abstract

The invention discloses an torsion-resistant suspension structure of a power assembly, which comprises a torsion-resistant pull rod and a torsion-resistant bracket, wherein the torsion-resistant pullrod comprises a torsion-resistant pull rod framework, one end of the torsion-resistant pull rod framework is fixedly connected with the torsion-resistant bracket through a small bushing, the other endof the torsion-resistant pull rod framework is provided with a large bushing, a large bushing rubber ring and a large bushing inner core are arranged in the large bushing, and the torsion-resistant suspension structure also comprises a vibration absorber, wherein the vibration absorber is detachably and fixedly connected with the torsion-resistant pull rod framework; the large bushing rubber ringis provided with a forward gear rubber collision block, the large bushing inner core is provided with a forward gear rubber limit block, and the forward gear rubber collision block and the forward gear rubber limit block are both in convex arc shapes and are oppositely arranged in the length direction of the torsion-resistant pull rod framework. According to the invention, the natural frequency of the torsion-resistant suspension structure is shifted to two sides of an original resonance frequency, so that the vibration intensity under the resonance frequency is reduced; meanwhile, the changeof the rigidity curve under the three-gear acceleration working condition is smooth, the vibration intensity is further integrally reduced, the noise in the vehicle caused by the resonance and the acceleration working condition is obviously reduced, and the NVH performance of the whole vehicle is improved.

Description

technical field [0001] The invention relates to the technical field of automobile engine vibration reduction, in particular to a power assembly anti-torsion suspension structure. Background technique [0002] The main function of the torsional mount is to limit the torsional displacement of the powertrain and to isolate torsional vibration. Reasonable design of the torsional mount structure (including the stiffness of the large and small bushes, the length of the connecting frame, the modal frequency of the assembly, etc.) has a significant effect on the vibration isolation and decoupling capabilities of the control mount system. [0003] Aiming at the problems of loud acceleration noise in the third gear area and roaring sound in the car in the SUV model equipped with a three-point pendulum suspension system: the noise in the car is easy to detect when accelerating, and the roaring sound at a high speed is at a certain frequency in the X direction and at a certain frequency...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem of loud acceleration noise in the third gear area and roaring sound in the car in the SUV model equipped with a three-point pendulum suspension system: the noise in the car is easy to detect when accelerating, and the roaring sound at a high speed is at a certain frequency in the X direction and at a certain frequency in the Z direction. There are abnormal peaks around a certain frequency, affecting ride comfort

But the mating surfaces of the recessed portion and the fourth rubber bumper are planes, such as Figure 7 As shown, the curve D is the stiffness curve of the torsional suspension structure. It can be seen from the figure that the slope of the stiffness curve ab in the third gear area will gradually increase, resulting in a rapid increase in stiffness, so that under the acceleration condition of the third gear Causes large vibration and noise in the car, affecting the NVH performance of the whole car

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