公开(公告)号：US11293417B2

公开(公告)日：2022-04-05

申请号：US16484921

申请日：2018-06-04

Applicant: KOMATSU LTD.

Inventor： Mutsumi Ono ,  Mitsuru Ohshiro ,  Naoya Sodeyama ,  Jun Nabata ,  Shuuji Hori

IPC: F04B1/324 ,  F04B1/2078

Abstract: A variable displacement hydraulic pump or motor includes: a swash plate; a lever supported by a housing and configured to rotate in conjunction of tilting of the swash plate; and a sensor configured to detect a displacement amount of the lever.

公开(公告)号：US20200003191A1

公开(公告)日：2020-01-02

申请号：US16484921

申请日：2018-06-04

Applicant: KOMATSU LTD.

Inventor： Mutsumi Ono ,  Mitsuru Ohshiro ,  Naoya Sodeyama ,  Jun Nabata ,  Shuuji Hori

IPC: F04B1/32

Abstract: A variable displacement hydraulic pump or motor (10) includes: a swash plate (13); a lever (22) supported by a housing (21) and configured to rotate in conjunction of tilting of the swash plate (13); and a sensor (23) configured to detect a displacement amount of the lever (22).

公开(公告)号：US20170276055A1

公开(公告)日：2017-09-28

申请号：US15504137

申请日：2014-08-22

Applicant: Komatsu Ltd.

Inventor： Jun Nabata ,  Takashi Ochiai ,  Shuuji Hori

IPC: F01P5/04 ,  G11B7/09 ,  F16K31/06 ,  F01P7/04

CPC classification number: F01P5/04 ,  F01P7/044 ,  F04B1/24 ,  F04B2201/0805 ,  F16K31/0682 ,  G11B7/0903

Abstract: A hydraulic pump/motor includes a rotational shaft rotatably attached inside a casing, a cylinder block configured to rotate together with the rotational shaft, a plurality of pistons, a swash plate, a valve plate, and a rotation detection mechanism. The rotation detection mechanism includes a detection target section having three or more recesses formed on an outer peripheral surface of the cylinder block in a unique arrangement pattern with different arc lengths between the three continuous recesses with respect to one rotational direction of the rotational shaft and being formed so as not to include the unique arrangement pattern with respect to the other rotational direction of the rotational shaft, each of the three or more recesses having a cross section having a same semicircular shape perpendicular to a direction of the rotational shaft; and a rotation sensor arranged in the casing in a state of facing the detection target section.