# US 11,306,792 B2 · Automatic transmission > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,792 B2 - Document ID: US11306792B2 - Status: Granted - Kind: B2 - Application number: 17/029,412 - Filed: 2020-09-23 - Published: 2021-05-06 - Granted: 2022-04-19 - Earliest claimed: 2019-10-30 - Assignees: Mazda Motor Corporation - Applicants: Mazda Motor Corporation - Inventors: Tomotaka Ishizaka; Norio Iwashita; Kensuke Ueda; Masanori Sasaki - Web page: https://patentgrep.com/patent/US11306792B2 ## CPC - F16D 67/04: fluid actuated - F16D 25/10: Clutch systems with a plurality of fluid-actuated clutches (arrangements or mounting of clutches in vehicles B60K17/00) - F16D 25/123: {in view of cooling and lubrication} - F16H 57/023: Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly - F16H 57/043: {within rotary parts, e.g. axial channels or radial openings in shafts} - F16H 57/0473: {Friction devices, e.g. clutches or brakes} - F16H 63/3026: {comprising friction clutches or brakes (band brake actuating mechanisms F16H63/3003)} - F16D 25/0638: with more than two discs, e.g. multiple lamellae - F16D 2121/04: acting on a piston-type actuator, e.g. for liquid pressure - F16D 2300/06: Lubrication details not provided for in group F16D13/74 - F16H 57/0424: {Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes} - F16H 57/0484: {with variable gear ratio or for reversing rotary motion} - F16H 2057/02047: {Automatic transmissions} - F16H 2057/02095: {Measures for reducing number of parts or components} - F16H 2063/3093: {Final output elements, i.e. the final elements to establish gear ratio, e.g. coupling sleeves or other means establishing coupling to shaft} - F16H 2200/006: the gear ratios comprising eight forward speeds - F16H 2200/2012: with four sets of orbital gears - F16H 2200/2043: with five engaging means - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - F16H: GEARING ## Abstract An automatic transmission is provided, which includes a transmission case having a vertical wall part, a clutch disposed on a first side of the vertical wall part in an axial direction, a given component disposed on the second side of the vertical wall part, and a sleeve having a cylindrical body and a flange part coupled to the second side of the vertical wall part and disposed radially inward of the given component. The hydraulic fluid is supplied to the clutch from radially inward of the clutch through the vertical wall part. An oil supply passage is configured to supply the hydraulic fluid to the radially inward of the clutch through a first oil passage extending in the axial direction via a coupling part between the vertical wall part and the flange part, a second oil passage inside the flange part, and a third oil passage inside the cylindrical body. ## Claims ### Claim 1 An automatic transmission, comprising: a transmission case having a vertical wall part; a clutch disposed on a first side of the vertical wall part in an axial direction of the transmission case; a given component disposed on a second side of the vertical wall part in the axial direction; a sleeve having a cylindrical body extending in the axial direction to the first side and to the second side of the vertical wall part, at a location radially inward of the vertical wall part, and a flange part extending radially outward from the cylindrical body and coupled to the vertical wall part from the second side in the axial direction, the flange part being disposed radially inward of the given component; and an oil supply passage through which hydraulic fluid is supplied to the clutch, wherein the hydraulic fluid is supplied to the clutch from radially inward of the clutch through the vertical wall part, wherein the oil supply passage is configured to supply the hydraulic fluid from the vertical wall part to the radially inward of the clutch through a first oil passage extending in the axial direction via a coupling part between the vertical wall part and the flange part, a second oil passage inside the flange part, connected to the first oil passage and extending in the radial direction, and a third oil passage inside the cylindrical body, connected to the second oil passage and extending in the axial direction, and wherein a position of the flange part in the axial direction is configured to overlap with a position of the given component in the axial direction. ### Claim 2 (depends on 1) The automatic transmission of claim 1, wherein the given component is a brake. ### Claim 3 (depends on 1) The automatic transmission of claim 1, wherein the sleeve includes a first sleeve having a first cylindrical body constituting an outer circumferential side of the cylindrical body, and the flange part, and a second sleeve having a second cylindrical body constituting an inner circumferential side of the cylindrical body and attached to an inner surface of the first cylindrical body, and wherein the third oil passage is formed between the inner surface of the first cylindrical body and an outer surface of the second cylindrical body. ### Claim 4 (depends on 1) The automatic transmission of claim 1, wherein the clutch includes a plurality of clutches disposed on the first side of the vertical wall part in the axial direction, and wherein the oil supply passage includes a plurality of oil supply passages through which hydraulic fluid for engagement is supplied to the plurality of clutches, respectively. ### Claim 5 (depends on 1) The automatic transmission of claim 1, wherein the clutch includes a plurality of clutches disposed on the first side of the vertical wall part in the axial direction, and wherein the oil supply passage includes an oil supply passage through which hydraulic fluid for lubrication is supplied to the plurality of clutches. ### Claim 6 (depends on 1) The automatic transmission of claim 1, wherein a plate configured to receive a return spring of a brake that is the given component is coupled to the vertical wall part, together with the sleeve, by a coupling member configured to couple the sleeve. ### Claim 7 (depends on 2) The automatic transmission of claim 2, wherein the sleeve includes a first sleeve having a first cylindrical body constituting an outer circumferential side of the cylindrical body, and the flange part, and a second sleeve having a second cylindrical body constituting an inner circumferential side of the cylindrical body and attached to an inner surface of the first cylindrical body, and wherein the third oil passage is formed between the inner surface of the first cylindrical body and an outer surface of the second cylindrical body. ### Claim 8 (depends on 2) The automatic transmission of claim 2, wherein the clutch includes a plurality of clutches disposed on the first side of the vertical wall part in the axial direction, and wherein the oil supply passage includes a plurality of oil supply passages through which hydraulic fluid for engagement is supplied to the plurality of clutches, respectively. ### Claim 9 (depends on 2) The automatic transmission of claim 2, wherein the clutch includes a plurality of clutches disposed on the first side of the vertical wall part in the axial direction, and wherein the oil supply passage includes an oil supply passage through which hydraulic fluid for lubrication is supplied to the plurality of clutches. ### Claim 10 (depends on 2) The automatic transmission of claim 2, wherein a plate configured to receive a return spring of a brake that is the given component is coupled to the vertical wall part, together with the sleeve, by a coupling member configured to couple the sleeve. ### Claim 11 (depends on 3) The automatic transmission of claim 3, wherein the clutch includes a plurality of clutches disposed on the first side of the vertical wall part in the axial direction, and wherein the oil supply passage includes a plurality of oil supply passages through which hydraulic fluid for engagement is supplied to the plurality of clutches, respectively. ### Claim 12 (depends on 3) The automatic transmission of claim 3, wherein the clutch includes a plurality of clutches disposed on the first side of the vertical wall part in the axial direction, and wherein the oil supply passage includes an oil supply passage through which hydraulic fluid for lubrication is supplied to the plurality of clutches. ### Claim 13 (depends on 3) The automatic transmission of claim 3, wherein a plate configured to receive a return spring of a brake that is the given component is coupled to the vertical wall part, together with the sleeve, by a coupling member configured to couple the sleeve. ### Claim 14 (depends on 4) The automatic transmission of claim 4, wherein a plate configured to receive a return spring of a brake that is the given component is coupled to the vertical wall part, together with the sleeve, by a coupling member configured to couple the sleeve. ### Claim 15 (depends on 5) The automatic transmission of claim 5, wherein a plate configured to receive a return spring of a brake that is the given component is coupled to the vertical wall part, together with the sleeve, by a coupling member configured to couple the sleeve. ### Claim 16 (depends on 7) The automatic transmission of claim 7, wherein the clutch includes a plurality of clutches disposed on the first side of the vertical wall part in the axial direction, and wherein the oil supply passage includes a plurality of oil supply passages through which hydraulic fluid for engagement is supplied to the plurality of clutches, respectively. ### Claim 17 (depends on 7) The automatic transmission of claim 7, wherein the clutch includes a plurality of clutches disposed on the first side of the vertical wall part in the axial direction, and wherein the oil supply passage includes an oil supply passage through which hydraulic fluid for lubrication is supplied to the plurality of clutches. ### Claim 18 (depends on 17) The automatic transmission of claim 17, wherein a plate configured to receive a return spring of a brake that is the given component is coupled to the vertical wall part, together with the sleeve, by a coupling member configured to couple the sleeve.