# US 7,607,520 B2 · Electric disk brake for vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,607,520 B2 - Document ID: US7607520B2 - Status: Granted - Kind: B2 - Application number: 11/496,002 - Filed: 2006-07-28 - Published: 2007-02-15 - Granted: 2009-10-27 - Earliest claimed: 2005-08-04 - Assignees: Nissin Kogyo Co., Ltd.; Honda Motor Co., Ltd. - Inventors: Manabu Matsushita; Akihiko Koike - Web page: https://patentgrep.com/patent/US7607520B2 ## CPC - H02K 5/148: {Slidably supported brushes} - B60T 13/74: with electrical assistance or drive - H02K 7/06: Means for converting reciprocating motion into rotary motion or vice versa - H02K 23/66: Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the machine, e.g. with impedances or switches - H02K 5/225: {Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132)} - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES ## Abstract An electric disk brake for a vehicle, includes an electric motor in which a brush coming into slide contact with a commutator provided on an output shaft rotatably supported in a motor housing is held by a brush holder secured to the motor housing, and a rotation angle detection sensor for detecting a rotation angle of the electric motor. A brake piston driven by the electric motor is slidably fitted to a caliper body. A detected portion to be detected by the rotation angle detection sensor housed and placed in the motor housing is provided on the output shaft in the motor housing. Thus, the rotation angle detection sensor can be provided without any special waterproof seal and with a reduced number of components. ## Claims ### Claim 1 An electric disk brake for a vehicle, said electric disk brake comprising: an electric motor in which a brush, that comes into slide contact with a commutator provided on an output shaft rotatably supported in a motor housing, is held by a brush holder secured to the motor housing; a rotation angle detection sensor for detecting a rotation angle of the electric motor, the rotation angle sensor disposed inside of the motor housing; and a brake piston driven by the electric motor being slidably fitted to a caliper body, wherein a detected portion to be detected by the rotation angle detection sensor is provided on the output shaft in the motor housing, the detected portion circumferentially disposed from the rotation angle detection sensor relative to an axis of the output shaft in the motor housing; a bottomed cylindrical yoke having a plurality of magnets on an inner periphery thereof; a lid plate that is connected to the yoke to cover an opening formed therein and which holds the brush holder between itself and the yoke, the lid plate having a bearing housing integrally provided thereon for housing a motor bearing; and a motor bearing disposed in the bearing housing for rotatably supporting the output shaft therein; wherein the rotation angle detection sensor is housed and secured in a recess provided in the brush holder so as to be covered with the lid plate. ### Claim 2 (depends on 1) The electric disk brake for a vehicle according to claim 1, wherein the detected portion is provided on the output shaft between the commutator and the motor bearing provided on the lid plate. ### Claim 3 (depends on 1) The electric disk brake for a vehicle according to claim 1, wherein a coupler for removably mounting an external connector is integrally provided in the brush holder. ### Claim 4 (depends on 2) The electric disk brake for a vehicle according to claim 2, wherein a coupler for removably mounting an external connector is integrally provided in the brush holder. ### Claim 5 An electric disk brake for a vehicle, said electric disk brake comprising an electric motor which includes: a motor housing comprising a bottomed cylindrical yoke having an opening end and a lid plate for covering the opening end, an output shaft rotatably supported in the motor housing, a commutator provided on the output shaft, a brush holder secured to the motor housing, a brush that comes into slide contact with the commutator and is held by the brush holder, a rotation angle detection sensor for detecting a rotation angle of the electric motor, and a detected portion to be detected by the rotation angle detection sensor provided on the output shaft inside the motor housing; and a brake piston driven by the electric motor being slidably fitted to a caliper body; wherein the rotation angle detection sensor is housed in a resin case secured in a recess provided in the brush holder so as to be covered with the lid plate and enclosed within the motor housing. ### Claim 6 (depends on 5) The electric disk brake for a vehicle according to claim 5, wherein the detected portion is provided on the output shaft between the commutator and a motor bearing, the motor bearing provided on the lid plate of the motor housing so as to enclose the motor bearing inside the motor housing. ### Claim 7 (depends on 5) The electric disk brake for a vehicle according to claim 5, wherein the brush holder is integrally provided with a coupler for removably mounting an external connector therein.