公开(公告)号：US20210184536A1

公开(公告)日：2021-06-17

申请号：US17188049

申请日：2021-03-01

Applicant: DENSO CORPORATION

Inventor： Hiroyuki KADO ,  Taku ITO

IPC: H02K5/10 ,  F16H61/32 ,  F16J15/447 ,  H02K7/116 ,  H02K5/22 ,  H02K7/14

Abstract: A rotary actuator includes: an electric motor; a case that receives the electric motor; a rotatable body that is configured to transmit an output of the electric motor to an outside of the case; a seal member that seals between the rotatable body and the case; and a labyrinth forming portion that forms a labyrinth space in a path that extends from an outside space of the case to a sealing point of the rotatable body, at which the rotatable body is sealed by the seal member.

公开(公告)号：US20200263790A1

公开(公告)日：2020-08-20

申请号：US16867850

申请日：2020-05-06

Applicant: DENSO CORPORATION

Inventor： Koji SAKAGUCHI ,  Taku ITO ,  Haruka MIYANO

IPC: F16H61/32 ,  F16H61/12

Abstract: A shift range switching system includes: a motor that includes motor windings and generates a cogging torque by a permanent magnet; drive circuits; an output shaft; a shift range switching mechanism that includes a trough providing member with troughs and crests and integrally rotates with the output shaft, an engagement member that fits in one trough corresponding to a shift range, and an urging member that urges the engagement member toward one trough; and a control unit with one calculation unit. The engagement member drops into one trough with an allowance. When an abnormality occurs in motor drive systems in an ascending action in which the engagement member moves from one trough toward one crest, the shift range switching systems avoids an occurrence of an intermediate range stop abnormality.

公开(公告)号：US20200263786A1

公开(公告)日：2020-08-20

申请号：US16867827

申请日：2020-05-06

Applicant: DENSO CORPORATION

Inventor： Koji SAKAGUCHI ,  Taku ITO ,  Haruka MIYANO

IPC: F16H61/12 ,  F16H61/32 ,  H02P6/10

Abstract: A shift range switching system includes: a motor that includes a motor winding and generates a cogging torque by a permanent magnet; a drive circuit; an output shaft; a shift range switching mechanism that includes a trough providing member with troughs and crests and integrally rotates with the output shaft, an engagement member that fits in one trough corresponding to a shift range, and an urging member that urges the engagement member toward the one trough; and a control unit. The engagement member drops into the one trough with an allowance. When an abnormality occurs in a motor drive system in an ascending action in which the engagement member moves from one trough toward one crest, the shift range switching system reduces an occurrence probability of an intermediate range stop abnormality.

公开(公告)号：US20190245407A1

公开(公告)日：2019-08-08

申请号：US16390273

申请日：2019-04-22

Applicant: DENSO CORPORATION

Inventor： Hiroyuki KADO ,  Taku ITO

IPC: H02K5/10 ,  F16H61/32 ,  H02K7/116 ,  F16J15/447

CPC classification number: H02K5/10 ,  F16H61/32 ,  F16H2061/326 ,  F16J15/4476 ,  H02K7/116 ,  H02K2205/09

Abstract: A rotary actuator includes: an electric motor; a case that receives the electric motor; a rotatable body that is configured to transmit an output of the electric motor to an outside of the case; a seal member that seals between the rotatable body and the case; and a labyrinth forming portion that forms a labyrinth space in a path that extends from an outside space of the case to a sealing point of the rotatable body, at which the rotatable body is sealed by the seal member.