US 11,988,266 B2
Shock absorber
Koichiro Awano, Tokyo (JP); Takahisa Mochizuki, Tokyo (JP); and Sodai Shimauchi, Gifu (JP)
Assigned to KYB Corporation, Tokyo (JP)
Appl. No. 17/434,973
Filed by KYB CORPORATION, Tokyo (JP)
PCT Filed Feb. 28, 2020, PCT No. PCT/JP2020/008380
§ 371(c)(1), (2) Date Aug. 30, 2021,
PCT Pub. No. WO2020/179684, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 2019-038129 (JP), filed on Mar. 4, 2019.
Prior Publication US 2022/0128117 A1, Apr. 28, 2022
Int. Cl. F16F 9/46 (2006.01); B62K 25/04 (2006.01); B62K 25/08 (2006.01); F16F 9/19 (2006.01); F16F 9/34 (2006.01)
CPC F16F 9/466 (2013.01) [F16F 9/19 (2013.01); F16F 9/34 (2013.01); B62K 2025/044 (2013.01); B62K 25/08 (2013.01); F16F 2222/12 (2013.01); F16F 2228/066 (2013.01); F16F 2232/08 (2013.01); F16F 2234/02 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A shock absorber comprising:
a cylinder;
a piston that is inserted into the cylinder so as to be movable in an axial direction and partitions an inside of the cylinder into an extension side chamber and a compression side chamber;
a piston rod that is coupled to the piston and has one end protruding to an outside of the cylinder;
a hard-side damping element that gives resistance to a flow of liquid from the extension side chamber to the compression side chamber;
an electromagnetic valve capable of changing an opening area of a bypass passage that bypasses the hard-side damping element and communicates the extension side chamber and the compression side chamber; and
a soft-side damping element provided in the bypass passage in series with the electromagnetic valve,
wherein the hard-side damping element includes an orifice and a leaf valve provided in parallel with the orifice, and
wherein the soft-side damping element includes a large-diameter orifice having an opening area larger than an opening area of the orifice.