Rigidity-adjustable semi-active control type torsional damper for vehicle

Abstract

The invention discloses a rigidity-adjustable semi-active control type torsional damper for vehicles. The rigidity-adjustable semi-active control type torsional damper for the vehicles comprises a driving shaft, a driven shaft, a negative stiffness structure, a positive stiffness structure, a damping fin, a displacement sensor, a controller and a power supply. The power supply is connected with the controller, and the controller is respectively connected with the negative stiffness structure, the positive stiffness structure and the displacement sensor. The positive stiffness structure is arranged at the bottom inside the driven shaft and covers the outer portion of the end of the driving shaft, the damping fin is arranged between the positive stiffness structure and the driven shaft, the negative stiffness structure sleeves the outer portion of the driving shaft and is connected between an outer circle of the driving shaft and an inner wall of the driven shaft, and the displacement sensor is arranged on the outer circle of the driving shaft. Compared with the prior art, the rigidity-adjustable semi-active control type torsional damper for the vehicles can guarantee the transmission of required torque and can reduce torsional vibration of a wide band, the problem of contradiction of a traditional torsional damper between torque transmission and vibration reduction is solved, and the rigidity-adjustable semi-active control type torsional damper for the vehicles is favorable for vehicle running safety and comfort.

Description

technical field [0001] The invention relates to a shafting torsional vibration damping mechanism, in particular to an adjustable stiffness semi-active control type vehicle torsional vibration damper. Background technique [0002] The phenomenon of torsional vibration in the vehicle power transmission system is ubiquitous, and torsional vibration will cause fatigue damage to shaft parts, reduce service life, and affect driving safety and comfort. In recent years, with the continuous improvement of vehicle operating speed and people's improvement of vehicle operating standards, the vibration of shaft components has attracted more and more attention from enterprises and scientific research units. [0003] The torsional shock absorber commonly used in vehicles now belongs to the passive type, because the elastic element of the passive torsional shock absorber is responsible for the dual functions of torque transmission and vibration reduction, that is, it is necessary to ensure ...

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Problems solved by technology

[0003] The torsional shock absorber commonly used in vehicles now belongs to the passive type, because the elastic element of the passive torsional shock absorber is responsible for the dual functions of torque transmission and vibration reduction, that is, it is necessary to ensure the average torque of the engine, and to make the stiffness as small as possible to achieve Good vibration damping effect is limited by the vibration damping mechanism and space size, and it is difficult to break through the contradiction between the stiffness of the elastic element and the load-carrying capacity, which makes the passive torsional damper's vibration damping frequency band limited, and it is difficult to further improve the vibration damping effect. Especially in terms of idling vibration reduction and high-speed vibration reduction in the transmission system

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