Electromagnetic variable force shock absorber

Abstract

The invention relates to an electromagnetic variable force shock absorber which comprises an oil storage cylinder, a work cylinder, an oil sealing cover, a piston rod connected with an upper connecting ring, a piston, a guide seat and an oil storage cylinder base seat connected with a lower connecting ring. The electromagnetic variable force shock absorber is characterized in that an electromagnetic coil is arranged on the piston; a lead connected with the electromagnetic coil passes through the piston rod; a damping channel is arranged on the piston; the damping channel is communicated with the peripheral space of the electromagnetic coil; a valve core which is provided with a circulation hole is arranged on the valve seat; a spring is assembled between the core valve and the valve seat; and the piston rod is provided with a flow passage communicated with circulation hole of the valve core. The invention has the characteristics of fast response, strong stability, wide adjustable range of damping force and continuously adjustable damping force. Time change is in the millisecond level, the root-mean-square value of acceleration at a vehicle seat can be reduced by 20% to 50%, forward rotation and hypsokinesis of passengers are reduced in braking and acceleration processes, drive is quiet and accurate, and ride is comfortable. The wheel adjoined-ground performance is obviously improved, rideperformance, safety and reliability are obviously improved, and the danger for driving on crankcase ventilaton, such as mine, and the like by drivers is greatly reduced. The invention is suitable for various surfaces.

Description

technical field [0001] The invention belongs to a vibration damping device for a motor vehicle, in particular to an electromagnetic variable force shock absorber for a motor vehicle. Background technique [0002] Shock absorbers are important components of vehicle suspensions such as heavy vehicles, tanks, and armored vehicles. Existing shock absorbers mainly include hydraulic shock absorbers and air-type shock absorbers according to the materials that produce damping. Among them, the hydraulic shock absorber is characterized by light weight, small external size, relatively simple structure, and easy to obtain the required resistance. Existing hydraulic shock absorbers are divided into two structural forms of one-way circulating flow and two-way reciprocating flow. The utility model patent No. 03211789.2 discloses a new type of "hydraulic shock absorber", which is a two-way reciprocating flow structure, which has the advantages of rapid vibration stop, effective buffering, ...

AI Technical Summary

Problems solved by technology

However, through practical application, it is found that there are still some deficiencies: if it cannot adapt to various working conditions, there are many valves, the structure and assembly are more complicated, the damping adjustment is completely dependent on the opening and closing of the one-way valve, and the flow area of ​​the valve is fixed, so it is not very good. Realize the requirements of fast response, continuously adjustable damping force and good ride comfort,

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