US 11,952,988 B2
Fluid pressure rotating machine
Hiroaki Kuboi, Kanagawa (JP); and Tetsuya Iwanaji, Kanagawa (JP)
Assigned to KYB CORPORATION, Tokyo (JP)
Appl. No. 17/906,233
Filed by KYB Corporation, Tokyo (JP)
PCT Filed Mar. 11, 2021, PCT No. PCT/JP2021/009842
§ 371(c)(1), (2) Date Sep. 13, 2022,
PCT Pub. No. WO2021/240951, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 2020-091536 (JP), filed on May 26, 2020.
Prior Publication US 2023/0122543 A1, Apr. 20, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F04B 1/324 (2020.01); F04B 1/2078 (2020.01)
CPC F04B 1/324 (2013.01) [F04B 1/2078 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A fluid pressure rotating machine comprising:
a cylinder block configured to be rotated together with a driving shaft;
a plurality of cylinders formed in the cylinder block, the cylinders being arranged at predetermined intervals in a circumferential direction of the driving shaft;
pistons respectively slidably inserted into the cylinders, the pistons each configured to define a capacity chamber in an interior of the cylinder;
a tiltable swash plate configured to cause the pistons to reciprocate such that the capacity chambers are expanded and contracted;
a first biasing mechanism configured to bias the swash plate in accordance with control pressure supplied;
a second biasing mechanism configured to bias the swash plate against the first biasing mechanism; and
a regulator configured to control the control pressure guided to the first biasing mechanism in accordance with self-pressure of the fluid pressure rotating machine, wherein
the regulator has:
a biasing member configured to be extended and compressed by following tilting of the swash plate;
a control spool configured to be moved in accordance with a biasing force from the biasing member, the control spool being configured to adjust the control pressure;
an auxiliary biasing member configured to exert a biasing force to the control spool against the biasing force from the biasing member; and
an adjusting mechanism configured to adjust the biasing force exerted by the auxiliary biasing member.