# US 2019/0316639 A1 · Clutch drive device and vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0316639 A1 - Document ID: US20190316639A1 - Status: Published application - Kind: A1 - Application number: 16/455,884 - Filed: 2019-06-28 - Published: 2019-10-17 - Earliest claimed: 2016-12-29 - Assignees: Yamaha Hatsudoki Kabushiki Kaisha - Applicants: Yamaha Hatsudoki Kabushiki Kaisha - Inventors: Kengo MINAMI; Yoshiki TERASHIMA; Yu SEKIYA - Web page: https://patentgrep.com/patent/US20190316639A1 ## CPC - F16D 23/12: Mechanical clutch-actuating mechanisms arranged outside the clutch as such (specific for combined clutches F16D21/00; mechanisms specific for synchronisation F16D23/02) - F16D 28/00: Electrically-actuated clutches (arrangements for synchronisation F16D23/02; clutches actuated directly by means of an electromagnet F16D27/00; automatic clutches F16D43/00 - F16D45/00; external control F16D48/00) - F16D 13/52: Clutches with multiple lamellae {; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member (F16D13/385 takes precedence)} - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES ## Abstract A clutch driving device having a self-lock function includes a friction mechanism that generates a friction force in a direction opposite to a rotation direction of rotation transferred by a transfer mechanism that transfers an output of a motor to a clutch. The friction mechanism includes a rotation body that rotates by the force in the rotation direction transferred by the transfer mechanism, a friction plate that generates a friction force by contact with the rotation body, and a spring that biases the friction plate toward the rotation body such that the rotation body and the friction plate are brought into contact with each other. An intermediate shaft of the transfer mechanism includes a rotation transfer portion that rotates together with the rotation body and is movable in the axial direction relative to the rotation body. ## Claims ### Claim 1 A clutch driving device including a driving unit for driving a clutch and a transfer mechanism that transfers, to the clutch, a rotation force output from the driving unit, the clutch driving device comprising: a friction mechanism that generates a friction force in a direction opposite to a rotation direction of the rotation force, wherein the transfer mechanism includes an input shaft that receives the rotation force output from the driving unit, an output shaft that outputs the rotation force to the clutch, and a transfer element that transfers the rotation force from the input shaft to the output shaft, the friction mechanism includes a rotation body that rotates about an axis in response to the rotation force transferred by the transfer mechanism, a friction force generating portion that generates a friction force by contact with the rotation body, and a biasing portion that biases one of the rotation body or the friction force generating portion relative to the other in an axial direction such that the rotation body and the friction force generating portion are brought into contact with each other, the axial direction being a direction in which the axis extends, and one of the input shaft, the output shaft, or the transfer element includes a rotation transfer portion that rotates together with the rotation body and is disposed to be movable in the axial direction relative to the rotation body. ### Claim 2 (depends on 1) The clutch driving device according to claim 1, further comprising: a casing housing the transfer mechanism and the friction mechanism, wherein the casing includes a first casing portion housing the transfer mechanism and a second casing portion housing the friction mechanism. ### Claim 3 (depends on 2) The clutch driving device according to claim 2, wherein one of the input shaft, the output shaft, or the transfer element including the rotation transfer portion partially projects out of the first casing portion. ### Claim 4 (depends on 2) The clutch driving device according to claim 2, wherein the first casing portion has a cylindrical shape having a bottom, and the second casing portion is attached to the first casing portion to cover an opening of the first casing portion. ### Claim 5 (depends on 3) The clutch driving device according to claim 3, wherein the first casing portion has a cylindrical shape having a bottom, and the second casing portion is attached to the first casing portion to cover an opening of the first casing portion. ### Claim 6 (depends on 4) The clutch driving device according to claim 4, wherein the second casing portion includes a cover body that covers the opening of the first casing portion and includes a housing recess capable of housing at least a part of the friction mechanism, and a lid portion covering the housing recess. ### Claim 7 (depends on 5) The clutch driving device according to claim 5, wherein the second casing portion includes a cover body that covers the opening of the first casing portion and includes a housing recess capable of housing at least a part of the friction mechanism, and a lid portion covering the housing recess. ### Claim 8 (depends on 1) The clutch driving device according to claim 1, wherein the transfer element includes an intermediate shaft that transfers the rotation force from the input shaft to the output shaft, and the rotation transfer portion is disposed in the intermediate shaft. ### Claim 9 (depends on 1) The clutch driving device according to claim 1, wherein the rotation body is located closer to the rotation transfer portion than to the biasing portion. ### Claim 10 (depends on 1) The clutch driving device according to claim 1, wherein the rotation body has an opening portion at a rotation center of the rotation body, and the rotation transfer portion is located in the opening portion. ### Claim 11 (depends on 1) The clutch driving device according to claim 1, wherein the friction mechanism is disposed such that the transfer mechanism is located between the friction mechanism and the driving unit in the axial direction. ### Claim 12 (depends on 1) The clutch driving device according to claim 1, wherein the transfer element includes a spur gear, and rotation of the input shaft is transferred to the output shaft through the spur gear. ### Claim 13 (depends on 1) The clutch driving device according to claim 1, further comprising an assist mechanism that applies, to the output shaft, an assist force in the rotation direction to assist operation of the clutch. ### Claim 14 (depends on 1) A vehicle comprising the clutch driving device according to claim 1.