shock absorbers

Abstract

A shock absorber (20; 20A) comprising a first oil flow path (25) and a second oil flow path (27) connected to a damper housing (23) and allowing oil to flow therethrough, a compression resistance unit (30) including a resistance unit oil chamber (31a) connected to the first oil flow path (25) and allowing oil to flow thereinto when a rod (21) is displaced in a compression direction, and a receiving member (32) having one end facing the resistance unit oil chamber (31a) and the other end receiving an urging force of a spring (24), a reservoir (28) connected to the second oil flow path (27) and allowing oil to flow thereinto, and a flow rate control unit (29) provided on the second oil flow path (27) and capable of To control the flow rate of the oil flowing into the reservoir (28).

Claims

[1] Shock absorber, comprising: a pole; a piston attached to the rod; a damper housing having a tubular shape and surrounding a part of the rod and the piston so that the rod and the piston are movable in an axial direction in which oil is filled in the damper housing; a spring that urges the rod and the damper housing in an extension direction, which is a direction in which the rod and the damper housing are separated from each other; a first oil flow path connected to the damper housing and allowing oil to flow therethrough; a compression resistance unit comprising a resistance unit oil chamber and a receiving member, wherein the resistance unit oil chamber is connected to the first oil flow path and allows oil to flow thereinto when the rod is displaced in a compression direction opposite to the extension direction, and wherein the receiving member has one end facing the resistance unit oil chamber and another end receiving an urging force of the spring; a second oil flow path separate from the first oil flow path and allowing oil drained from the damper housing to flow therethrough; a reservoir connected to the second oil flow path and allowing oil to flow thereinto; and a flow rate control unit provided on the second oil flow path and configured to control a flow rate of the oil flowing to the reservoir. [2] The shock absorber according to claim 1, wherein the flow rate control unit is implemented by an orifice valve or a variable orifice valve. [3] The shock absorber according to claim 1, wherein the flow rate of the oil controlled by the flow rate control unit can be changed manually by an operator or electrically. [4] Shock absorber according to claim 1, further comprising: a vehicle height adjustment mechanism configured to adjust a vehicle height. [5] A shock absorber according to claim 4, wherein the compression resistance unit and the vehicle height adjusting mechanism are arranged in series. [6] The shock absorber according to claim 5, wherein the vehicle height adjusting mechanism is disposed between the spring and the compression resistance unit. [7] The shock absorber according to claim 4, wherein the vehicle height adjusting mechanism comprises a pump configured to supply a fluid for adjusting the vehicle height. [8] Shock absorber according to claim 7, comprising: a control unit configured to control the flow rate control unit and the pump. [9] A shock absorber according to claim 8, wherein the flow rate control unit and the pump are independently controllable.

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