Fluid variable damping shock absorber and washing machine equipped with same

Abstract

The invention discloses a fluid variable damping shock absorber comprising a shock absorber cylinder shell, a piston rod and a piston, wherein the shock absorber cylinder shell is composed of a damping chamber and a cushion chamber; the piston rod is inserted in the cylinder shell; the piston is fixedly arranged on the piston rod of the damping chamber; the cushion chamber is communicated with the outside world; a damping medium is loaded in the damping chamber; and a fluid channel used for the circulation of the damping medium is arranged in the piston. According to the shock absorber, two groups of one-way valves with opposite directions and unequal quantities are arranged on the piston; when the shock absorber motions toward different directions, only one group of one-way valves which are maintained in a same direction can open; and different damping of the shock absorber can be produced in reciprocating motion by utilizing the throttling action of the one-way valves on the damping medium with different flow directions. More particularly, the shock absorber provided by the invention can be in an undamped state during high-frequency shock; therefore, the resonance of a housing of a washing machine can be greatly weakened during the high-speed running of the washing machine, which is more beneficial to maintaining the stabilization of the washing machine and protecting the washing machine. The fluid variable damping shock absorber has a simple structure and a remarkable effect and is suitable for popularizing and using.

Description

technical field [0001] The invention relates to a shock absorber, in particular to a fluid variable damping shock absorber and a washing machine equipped with the shock absorber. Background technique [0002] The existing drum-type washing machine includes a shell forming an appearance; a washing tub arranged in the casing for storing washing water; a drum rotatably arranged in the washing tub for washing and dehydrating clothes; The back of the laundry bucket is connected to the drive motor of the rotating shaft of the drum. A door through which laundry is put in or out is rotatably provided on a front surface of the housing, and a bracket for supporting a rotating shaft of the drum is provided behind the tub. The spring is fixed to the casing at the upper part of the washing tub, and the shock absorber for attenuating the vibration transmitted to the washing tub from the drum is provided at the lower part of the washing tub. [0003] figure 1 is a longitudinal sectional...

AI Technical Summary

Problems solved by technology

However, in the shock absorber of the conventional drum type washing machine, the vibration amplitudes generated during the normal dehydration operation and the excessive dehydration operation are quite different in the actual washing operation, thus effectively attenuating large and small amplitude vibrations. Limited when vibrating

In the shock absorber of the existing drum type washing machine, the frictional force of the shock absorption is basically constant at all times, and the change and adjustment of the damping cannot be realized, because the constant damping in the reciprocating motion makes the damping force not too large , otherwise it will pull the shell of the washing machine to move, and it will not be able to absorb the vibration energy greatly

At the same time, the downward displacement of the outer cylinder is too large, which will increase the tension of the spring and increase the boost vibration

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