US 12,013,011 B2
Cylinder device
Chigaya Sekine, Ibaraki (JP); and Satsuki Yamamoto, Ibaraki (JP)
Assigned to HITACHI ASTEMO, LTD., Ibaraki (JP)
Appl. No. 17/621,787
Filed by HITACHI ASTEMO, LTD., Ibaraki (JP)
PCT Filed Jun. 5, 2020, PCT No. PCT/JP2020/022342
§ 371(c)(1), (2) Date Dec. 22, 2021,
PCT Pub. No. WO2020/261942, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 2019-118457 (JP), filed on Jun. 26, 2019.
Prior Publication US 2022/0260130 A1, Aug. 18, 2022
Int. Cl. F16F 9/58 (2006.01); B60G 13/08 (2006.01); F16F 1/12 (2006.01)
CPC F16F 9/58 (2013.01) [B60G 13/08 (2013.01); F16F 1/12 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A cylinder device comprising:
a cylinder in which a working fluid is filled and sealed;
a piston slidably fitted into the cylinder to divide an inside of the cylinder into a rod side chamber and a bottom side chamber;
a piston rod connected to the piston;
a rod guide provided at one end of the cylinder through which the piston rod is inserted and closed; and
a rebound control mechanism that operates during an extension stroke of the piston rod when the piston moves toward the rod guide in the cylinder,
wherein the rebound control mechanism includes:
a spring located between the piston and the rod guide and provided on an outer periphery of the piston rod; and
a spring receiver provided on the rod guide and to which one end of the spring is attached, and
wherein the spring receiver includes a tubular portion fixed between the cylinder and the rod guide, and a second flange portion provided at one end of the tubular portion and extending inward in a radial direction, and is configured to directly or indirectly fix the one end of the spring by the second flange portion, and
wherein the spring receiver includes a third flange portion engaged with the second flange portion, and a spring mounting portion protruding from the third flange portion toward the piston and press-fitted into one end of the spring.