# US 2021/0277958 A1 · Triple clutch and actuator thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0277958 A1 - Document ID: US20210277958A1 - Status: Published application - Kind: A1 - Application number: 16/332,486 - Filed: 2017-11-14 - Published: 2021-09-09 - Earliest claimed: 2017-11-14 - Assignees: C-Stone Technologies Co., Ltd. - Applicants: C-Stone Technologies Co., Ltd - Inventors: Dong-Hoon PARK - Web page: https://patentgrep.com/patent/US20210277958A1 ## CPC - F16D 21/06: at least two driving shafts or two driven shafts being concentric - F16D 25/082: {the line of action of the fluid-actuated members co-inciding with the axis of rotation} - B60K 6/26: characterised by the motors or the generators - B60K 6/38: characterised by the driveline clutches (shift clutches within the gearing or transmission B60K6/36) - 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 25/0638: with more than two discs, e.g. multiple lamellae - F16D 25/10: Clutch systems with a plurality of fluid-actuated clutches (arrangements or mounting of clutches in vehicles B60K17/00) - F16H 3/093: with two or more countershafts - B60Y 2200/92: Hybrid vehicles - B60Y 2400/424: Friction clutches - F16D 2021/0661: {Hydraulically actuated multiple lamellae clutches} - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - F16H: GEARING - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY ## Abstract a A triple clutch according to an exemplary embodiment of the present invention includes: an input shaft which receives rotational power of an engine; a motor which includes a motor housing, a stator fixedly mounted on an outer circumferential surface of the motor housing, and a rotor rotatably disposed at a radially inner side of the stator; a clutch housing which is operatively connected to the rotor, receives rotational power of the motor while rotating together with the rotor, and has therein a clutch space; a first clutch which selectively transmits rotational power of the clutch housing to a first output shaft; a second clutch which selectively transmits the rotational power of the clutch housing to a second output shaft; and a third clutch which selectively transmits rotational power of the input shaft to the clutch housing, in which all of the first, second, and third clutches are disposed in the clutch space. ## Claims ### Claim 1 A triple clutch comprising: an input shaft which receives rotational power of an engine; a motor which includes a motor housing, a stator fixedly mounted on an outer circumferential surface of the motor housing, and a rotor rotatably disposed at a radially inner side of the stator; a clutch housing which is operatively connected to the rotor, receives rotational power of the motor while rotating together with the rotor, and has lo therein a clutch space; a first clutch which selectively transmits rotational power of the clutch housing to a first output shaft; a second clutch which selectively transmits the rotational power of the clutch housing to a second output shaft; and a third clutch which selectively transmits rotational power of the input shaft to the clutch housing, ein all of the first, second, and third clutches are disposed in the clutch space. ### Claim 2 (depends on 1) The triple clutch of claim 1, wherein: the first, second, and third clutches include first, second, and third disc packs, respectively, and at least some of the first, second, and third disc packs are disposed in an axial direction within a length of the rotor. ### Claim 3 (depends on 1) The triple clutch of claim 1, wherein: the first and second clutches are disposed in parallel in an axial direction, and the third clutch is disposed at radially inner sides of the first and second clutches. ### Claim 4 (depends on 1) The triple clutch of claim 1, wherein: the first clutch includes a first disc pack which selectively and operatively connects the first output shaft and the clutch housing by axial force, and a drum which selectively applies the axial force to the first disc pack, second clutch includes a second disc pack which selectively and operatively connects the second output shaft and the clutch housing by axial force, the drum is operatively connected to the clutch housing and continuously receives the rotational power of the clutch housing, and the second disc pack selectively and operatively connects the second output shaft and the drum. ### Claim 5 (depends on 1) The triple clutch of claim 1, wherein: the motor housing includes a motor housing outer circumferential portion which extends in an axial direction and has an inner circumferential surface to which the stator is fixedly attached, a motor housing connecting portion which extends radially inward from a front end of the motor housing outer circumferential portion, and a motor housing inner circumferential portion which extends from an inner end of the motor housing connecting portion toward a rear side in the axial direction, and the clutch housing includes a clutch housing outer circumferential portion which extends in the axial direction and has an outer circumferential surface to which the rotor is fixedly attached, a clutch housing connecting portion which extends radially inward from a front end of the clutch housing outer circumferential portion and is spaced apart from the motor housing connecting portion in the axial direction, and a clutch housing inner circumferential portion which extends in the axial direction from an inner end of the clutch housing connecting portion and is spaced apart from the motor housing inner circumferential portion in a radial direction. ### Claim 6 (depends on 5) The triple clutch of claim 5, wherein: the first clutch includes: a first operating hub which is operatively connected to the first output shaft; a first disc pack which is mounted between the clutch housing outer circumferential portion and the first operating hub and selectively and operatively connects the clutch housing and the first operating hub by axial force; a drum which is operatively connected to an inner circumferential surface of the clutch housing outer circumferential portion and selectively applies the axial force to the first disc pack while moving in the axial direction; and a first pressure plate which applies the axial force to the drum. ### Claim 7 (depends on 6) The triple clutch of claim 6, wherein: the second clutch includes: a second operating hub which is operatively connected to the second output shaft; a second disc pack which is mounted between the drum and the second operating hub and selectively and operatively connects the drum and the second operating hub by axial force; and a second pressure plate which selectively applies the axial force to the second disc pack while moving in the axial direction. ### Claim 8 (depends on 7) The triple clutch of claim 7, wherein: the first pressure plate is mounted on an inner circumferential surface of the drum so as to be movable in the axial direction together with the drum, and the second pressure plate is coupled, by means of splines, to the inner circumferential surface of the drum so as to be movable in the axial direction independently of the drum. ### Claim 9 (depends on 7) The triple clutch of claim 7, wherein: the first pressure plate is disposed at an axially rear side of the second pressure plate. ### Claim 10 (depends on 5) The triple clutch of claim 5, wherein: the third clutch includes: a third operating hub which is operatively connected to the input shaft; a third disc pack which is mounted between the third operating hub and the clutch housing inner circumferential portion and selectively and operatively connects the clutch housing and the third operating hub by axial force; and a third pressure plate which selectively applies the axial force to the third disc pack while moving in the axial direction. ### Claim 11 (depends on 10) The triple clutch of claim 10, wherein: the third pressure plate penetrates the clutch housing connecting portion and applies the axial force to the third disc pack. ### Claim 12 An actuator which transmits axial force to a first clutch, a second clutch, or a third clutch of a triple clutch comprising: an input shaft which receives rotational power of an engine; a motor which includes a motor housing, a stator fixedly mounted on an outer circumferential surface of the motor housing, and a rotor rotatably disposed at a radially inner side of the stator; a clutch housing which is operatively connected to the rotor, receives rotational power of the motor while rotating together with the rotor, and has therein a clutch space; the first clutch which selectively transmits rotational power of the clutch housing to a first output shaft; the second clutch which selectively transmits the rotational power of the clutch housing to a second output shaft; and the third clutch which selectively transmits rotational power of the input shaft to the clutch housing, the actuator comprising: a first piston which transmits the axial force to the first clutch; a second piston which transmits the axial force to the second clutch; and a third piston which transmits the axial force to the third clutch, wherein the first piston and the second piston are provided in an actuator housing, and the third piston is mounted in a motor housing. ### Claim 13 (depends on 12) The actuator of claim 12, wherein: the first piston and the second piston are separated by a partition wall disposed between the first piston and the second piston, and an outer circumferential surface of the second piston is positioned to be closer to a radially outer side than is an inner circumferential surface of the first piston. ### Claim 14 (depends on 13) The actuator of claim 13, wherein: the partition wall includes: a partition wall mounting portion which is mounted in the actuator housing, extends toward a front side in the axial direction, and is slidably in contact with an outer end of the second piston; a partition wall connecting portion which extends radially inward from the partition wall mounting portion; and a partition wall extension portion which extends from an inner end of the partition wall connecting portion toward the front side in the axial direction and is slidably in contact with an inner circumferential surface of the first piston. ### Claim 15 (depends on 14) The actuator of claim 14, wherein: a first support plate is mounted on the partition wall extension portion at a front side of the first piston, a first return spring is mounted between the first support plate and a front surface of the first piston, and a second return spring is mounted between a front surface of the second piston and the partition wall connecting portion. ### Claim 16 (depends on 12) The actuator of claim 12, wherein: the motor housing includes a motor housing outer circumferential portion which extends in an axial direction and has an inner circumferential surface to which the stator is fixedly attached, a motor housing connecting portion which extends radially inward from a front end of the motor housing outer circumferential portion, and a motor housing inner circumferential portion which extends from an inner end of the motor housing connecting portion toward a rear side in the axial direction, the motor housing connecting portion further includes first and second protruding portions which are spaced radially apart from each other and extend toward the rear side in the axial direction, and the third piston is mounted in a space between the first and second protruding portions. ### Claim 17 (depends on 16) The actuator of claim 16, wherein: a second support plate is mounted on an inner circumferential surface of the first protruding portion, and a third return spring is mounted between the second support plate and a rear surface of the third piston. ### Claim 18 A triple clutch comprising: an input shaft which receives rotational power of an engine; a motor which includes a motor housing, a stator fixedly mounted on an outer circumferential surface of the motor housing, and a rotor rotatably disposed at a radially inner side of the stator; a clutch housing which is operatively connected to the rotor, receives rotational power of the motor while rotating together with the rotor, and has therein a clutch space; a first clutch which selectively transmits rotational power of the clutch housing to a first output shaft; a second clutch which selectively transmits the rotational power of the clutch housing to a second output shaft; and a third clutch which selectively transmits rotational power of the input shaft to the clutch housing, wherein the first, second, and third clutches include first, second, and third disc packs, respectively, and at least some of the first, second, and third disc packs are disposed in an axial direction within a length of the rotor. ### Claim 19 (depends on 18) The triple clutch of claim 18, wherein: the clutch housing includes a first support portion configured to support the first clutch in the axial direction, the first, second, and third clutches include first, second, and third operating hubs, respectively, the second operating hub includes a second operating hub extension portion that extends toward a rear side in the axial direction, the axial force applied to the first clutch is transmitted to the clutch housing and supported by a first support bearing disposed at the front side in the axial direction between the clutch housing and the motor housing, the axial force applied to the second clutch is transmitted to the second operating hub, transmitted to a second support bearing through a snap ring mounted on the second operating hub extension portion, and supported by the second supporting bearing, and the axial force applied to the third clutch is transmitted to the clutch housing through a snap ring mounted on an inner circumferential surface of the clutch housing, and supported by a third support bearing disposed at the rear side in the axial direction between the clutch housing and the motor housing. ### Claim 20 (depends on 18) The triple clutch of claim 18, wherein: the clutch housing includes a first support portion configured to support the first clutch in the axial direction, the first, second, and third clutches include first, second, and third operating hubs, respectively, the second operating hub is coupled, by means of spline, to a second output shaft and coupled by a snap ring mounted on the second output shaft, the axial force applied to the first clutch is transmitted to the clutch housing and supported by a first support bearing disposed at the front side in the axial direction between the clutch housing and the motor housing, the axial force applied to the second clutch is transmitted to the second operating hub, transmitted to the second output shaft by the snap ring mounted on the second output shaft, transmitted to and supported by a second support bearing mounted on the output shaft, and the axial force applied to the third clutch is transmitted to the clutch housing through a snap ring mounted on an inner circumferential surface of the clutch housing, and supported by a third support bearing disposed at the rear side in the axial direction between the clutch housing and the motor housing.