Passive damping adjustable magneto-rheological fluid shock absorber

Abstract

The invention discloses a passive damping adjustable magneto-rheological fluid shock absorber. The lower end of a damping cylinder is provided with a piston body; a spring is arranged between the piston body and the bottom surface of the damping cylinder; the middle part of the damping cylinder is provided with a T-shaped piston body; a coil is embedded in a groove at the middle part of a cylindrical surface at the small end of the T-shaped piston body; the coil is sequentially provided with inner and outer hole bodies outwards; the inner and outer hole bodies are in clearance fit; the upper end of the damping cylinder is provided with a T-shaped damping cavity cover body; the upper end of an induction cylinder is connected with an induction cavity cover; permanent magnets are fixed amongan inner hole of the induction cylinder, the damping cavity cover body and the lower end of an induction cavity cover; a piston rod passes through the induction cavity cover, an induction iron core and the damping cavity cover body to be connected with a threaded hole at the center of the T-shaped piston body; an induction coil is embedded in a groove of the induction iron core; the two coils areconnected through a lead hole in the middle of the piston rod; a sealed inner cavity is formed among the damping cavity cover body, the piston body and the damping cylinder; and the sealed inner cavity is filled with magneto-rheological fluid. The size of a damping force of the shock absorber can be automatically regulated according to the vibration condition and an external power supply and a controller are not required.

Description

technical field [0001] The invention relates to a magnetorheological fluid shock absorber, in particular to a passive damping adjustable magnetorheological fluid shock absorber. Background technique [0002] Motorcycles, electric vehicles and bicycles will cause indirect rigid vibration between the occupant and the ground due to potholes or complex terrain when riding, thus affecting riding safety and comfort. At present, most of them are equipped with springs or hydraulic dampers. Vibrator for vibration damping. However, pure spring damping cannot quickly attenuate the vibration, causing the occupant to bump, increasing the risk and discomfort of riding; the traditional hydraulic shock absorber has constant damping characteristics, and damps when the vibration is severe or slight The characteristics are consistent, but in order to attenuate severe vibration as soon as possible during riding, it is necessary to increase the damping force. The traditional hydraulic shock abs...

AI Technical Summary

Problems solved by technology

However, the magnetorheological fluid damper currently developed requires an external power supply and a controller to control the magnetic field strength of the magnetorheological fluid, resulting in a complex device and an increase in cost; in addition, the current damping channel of the magnetorheological fluid damper is linear, The damping force is too small, and the length of the damping channel needs to be increased to increase the damping force

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