公开(公告)号：US20190264759A1

公开(公告)日：2019-08-29

申请号：US16410001

申请日：2019-05-13

Applicant: DENSO CORPORATION

Inventor： Yugo YAMADA ,  Akira KISHIBUCHI ,  Junichi NAKAGAWA ,  Toshinobu TAKASAKI ,  Kozo TOMOKAWA ,  Satoshi KAWAKAMI ,  Yohei KUSHIDA

IPC: F16D27/112 ,  H02K1/22 ,  F16D27/14 ,  B60H1/32

Abstract: A power transmission device includes an armature that is shaped into a circular ring form and is configured to be coupled with a rotor by an electromagnetic attractive force of an electromagnet at a time of energizing the electromagnet and is configured to be decoupled from the rotor at a time of deenergizing the electromagnet. The armature has an armature-side friction surface that is configured to contact a rotor-side friction surface of the rotor at the time of energizing the electromagnet. Grooves are formed at the armature-side friction surface such that each of the grooves extends in a form of slit from a radially inner side toward a radially outer side of the armature-side friction surface. A different type of material, which is different from a material of the armature-side friction surface, is placed in the grooves.

公开(公告)号：US20190264758A1

公开(公告)日：2019-08-29

申请号：US16409955

申请日：2019-05-13

Applicant: DENSO CORPORATION

Inventor： Yugo YAMADA ,  Akira KISHIBUCHI ,  Yohei KUSHIDA ,  Junichi NAKAGAWA ,  Satoshi KAWAKAMI ,  Toshinobu TAKASAKI ,  Kozo TOMOKAWA

IPC: F16D27/112 ,  H02K1/22

Abstract: A power transmission device includes an armature that is shaped into a circular ring form. The armature is configured to be coupled with a rotor by an electromagnetic attractive force of an electromagnet at a time of energizing the electromagnet and is configured to be decoupled from the rotor at a time of deenergizing the electromagnet. The armature has an armature-side friction surface that is configured to contact a rotor-side friction surface of the rotor at the time of energizing the electromagnet. The armature-side friction surface has a plurality of grooves, each of which extends from a radially inner end portion of the armature-side friction surface to a location that is on a radially inner side of a radially outer end portion of the armature-side friction surface.

公开(公告)号：US20180058516A1

公开(公告)日：2018-03-01

申请号：US15557491

申请日：2016-05-23

Applicant: DENSO CORPORATION

Inventor： Yousuke YAMAGAMI ,  Hirotaka MATSUMOTO ,  Motohiko UEDA ,  Masashi TOBAYAMA ,  Satoshi KAWAKAMI

IPC: F16D27/112 ,  F16D13/64 ,  C23C8/30

CPC classification number: F16D27/112 ,  C23C8/30 ,  C23C10/14 ,  C23C10/24 ,  C23C10/60 ,  F16D3/76 ,  F16D13/40 ,  F16D13/64 ,  F16D13/76 ,  F16D2200/0021 ,  F16D2200/0052 ,  F16D2250/0046 ,  F16H55/36

Abstract: A clutch includes: a rotor that has a steel material as a base material and is rotated upon receiving a rotational drive force from a drive source; and an armature that has a steel material as a base material and receives the rotational drive force from the rotor when the armature is attracted to the rotor by a magnetic force. The armature has a contact surface side region that includes a contact surface, which contacts a counterpart when the armature is attracted to the rotor. The contact surface side region has a plurality of pores opened at the contact surface and forms a nitride compound of an element of the base material through nitridization of a part of the base material while the contact surface side region is harder than an unreacted portion of the base material that is not reacted at the nitridization.