Torsional vibration absorber with excellent NVH (Noise Vibration and Harshness) performance, vibration absorber connecting structure and vehicle

Abstract

The invention discloses a torsional vibration absorber with excellent NVH (Noise Vibration and Harshness) performance, a vibration absorber connecting structure and a vehicle. The torsional vibration absorber comprises a flange plate, rubber, a pin and an inertia ring, and the rubber is vulcanized between the flange plate and the inertia ring to form a whole; the pin is assembled in the axial through hole of the rubber and can roll in the axial through hole in the circumferential direction to limit the radial movement of the inertia ring, so that the inertia ring is coaxial with the flange plate; the rubber comprises a main spring, and a plurality of axial through holes and limiting structures are arranged on the main spring in the circumferential direction at intervals. The pin penetrates through an axial through hole in the main spring and is radially limited with the main spring; the limiting structure is a bidirectional limiting structure; the main spring is of a double-main-spring structure and is composed of two semicircular main spring units in a butt joint mode. Overload can be reliably prevented, the service life is prolonged, the structure is simple, functions are complete, cost is low, assembling is easy, vibration of a transmission system can be effectively reduced, and the NVH performance is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of automobile transmission systems, and in particular relates to a torsional vibration absorber with excellent NVH performance, a vibration absorber connecting structure and a vehicle. Background technique [0002] The excitation of the automobile transmission system mainly comes from the excitation of the engine, the impact of gear gnawing and the order excitation of the universal joint of the transmission shaft. When the torsional vibration frequency of the transmission system coincides with or is similar to the excitation frequency, the transmission system will generate torsional vibration, and the torsional vibration will be transmitted to the cab through the suspension, frame and other structures, resulting in roaring noise. [0003] For front-rear-drive vehicles, the transmission chain of the transmission system is long, and its first-order torsion frequency is low. In the common vehicle speed range, t...

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Problems solved by technology

[0006] 2. A flexible coupling is added to the transmission system, and the wire is wound between the two sleeves of the flexible coupling, which can buffer the excitation vibration of the transmission system. This optimization scheme has a good effect, but the cost is relatively high (the torsional 60-80 yuan / piece, flexible couplings are generally 200 yuan / piece), generally used in high-end passenger cars

[0007] However, both of the above two solutions have the problems of complex structure, high difficulty in assembly, unfavorable positioning, easy overload, and insufficient NVH performance

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