Vibration damping device, suspension and suspension stiffness control method

Abstract

The invention discloses a shock absorbing device, a suspension and a suspension stiffness control method. According to the shock absorbing device, an assistant shock absorbing element is prearranged in an initial position separating from a shock frame or moving out of a shocking location, and the assistant shock absorbing element is adjusted to a work position in abut connection with the shock frame or moved into the shocking location as required by the shock frame and is moved back to the initial position as not required by the shock frame subsequently. Thus, the assistant shock absorbing element can be adjusted corresponding to the shock absorbing requirements of the shock frame to enter the work position actively, the assistant shock absorbing element can be adjusted actively to be adaptive to the shock absorbing requirements of the shock frame when the shock absorbing requirements of the shock frame occur, the shock absorbing element stiffness can be adjusted rapidly, the shock absorbing requirements of the shock frame can be met by one step, and rapid and active shock absorbing effect is realized.

Description

technical field [0001] The invention relates to a damping device, a mount and a method for controlling the stiffness of the mount. Background technique [0002] The powertrain mount is a relatively soft component connecting the powertrain and the frame, and its function is to attenuate the transmission of vibration force between the powertrain and the frame. Therefore, the powertrain mount should have the following characteristics: It has sufficient static stiffness to support the powertrain; with reasonable dynamic stiffness, it can effectively isolate the vibration of the frame or body caused by the engine excitation, reduce the vibration and noise inside the vehicle, and effectively isolate the input caused by the unevenness of the road surface. Powertrain vibrations. It can be seen that the suspension is required to have small stiffness and small damping under the conditions of constant speed driving to reduce the vibration and noise in the car; when the engine is start...

AI Technical Summary

Problems solved by technology

Most of the existing bus powertrain mounts on the market use rubber mounts, but due to the structural characteristics of rubber, either the stiffness and damping are designed to be large at the same time, or the design is small at the same time, which only meets the requirements of the mount stiffness in the main working conditions such as constant speed. Requirements, resulting in poor shock mitigation effect in engine start and stop, acceleration and deceleration, and uneven road surface conditions

[0003] Chinese patent document 201961398U discloses a variable stiffness front suspension device, which includes a vibrating frame hinged between the fixed frame and the cab, and a damping shock absorber is hinged between the front side of the vibrating frame and the fixed frame , and the main spring mounted on the lower side of the vibrating frame is fixed at the bottom of the fixed frame, and the auxiliary springs arranged at intervals under the vibrating frame are respectively fixed on the top of the fixed frame at the front and rear sides of the hinge point of the vibrating frame. When in use, as the cab tilts forward or backward, the vibrating frame will tilt forward or backward correspondingly driven by the cab, and after the vibrating frame is lifted by the hinge point on the fixed frame, the vibrating frame will Press one of the two auxiliary springs, so that the two auxiliary springs can buffer the impact force of the vibrating frame together with the main spring when the cab moves, but the auxiliary spring is in passive contact with the vibrating frame and cannot actively contact the vibrating frame Clutching or entering and leaving the vibration area cannot actively adjust the stiffness of the suspension device, and its work is only related to the amplitude of the vibration, so it cannot be applied to vibration reduction occasions with small amplitude and high frequency

Images