# US 10,309,523 B2 · Driving force transmission device of vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,309,523 B2 - Document ID: US10309523B2 - Status: Granted - Kind: B2 - Application number: 15/486,379 - Filed: 2017-04-13 - Published: 2017-11-30 - Granted: 2019-06-04 - Earliest claimed: 2016-05-30 - Assignees: Subaru Corporation - Applicants: Subaru Corporation - Inventors: Hirofumi Kawarazaki; Satoshi Akimoto - Web page: https://patentgrep.com/patent/US10309523B2 ## CPC - F16H 57/0471: {Bearing} - B60K 1/00: Arrangement or mounting of electrical propulsion units (B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00) - F16C 33/6677: {from radial inside, e.g. via a passage through the shaft and/or inner ring} - F16H 57/0426: {Means for guiding lubricant into an axial channel of a shaft} - F16H 57/043: {within rotary parts, e.g. axial channels or radial openings in shafts} - F16H 57/0435: {Pressure control for supplying lubricant; Circuits or valves therefor} - F16H 57/045: {Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case} - F16H 57/0457: {Splash lubrication} - F16H 57/0495: {with fixed gear ratio} - F16K 15/026: {the valve member being a movable body around which the medium flows when the valve is open} - F16K 31/44: Mechanical actuating means - F16K 99/0063: {using centrifugal forces} - B60K 2001/001: {one motor mounted on a propulsion axle for rotating right and left wheels of this axle} - B60Y 2306/03: Lubrication - F16C 2361/61: Toothed gear systems, e.g. support of pinion shafts - F16H 57/0423: {Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes} - F16H 57/0483: {Axle or inter-axle differentials} - F16H: GEARING - 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 - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY ## Abstract A driving force transmission device of a vehicle includes: a main body; a carrying up gear; a drive shaft; and a blocking member. A gear that transmits a driving force to the vehicle is housed in the main body. The carrying up gear carries up a lubricating oil stored in the main body. The drive shaft has, in the shaft, a lubricating oil storage space into which the carried up lubricating oil is introduced and a lubricating oil discharge hole through which the lubricating oil in the lubricating oil storage space is supplied to a bearing unit. The blocking member blocks the lubricating oil discharge hole in accordance with a rotational speed of the drive shaft. ## Claims ### Claim 1 A driving force transmission device of a vehicle, the driving force transmission device comprising: a main body in which a driving force gear configured to transmit a driving force to the vehicle is housed; a carrying up gear configured to carry up a lubricating oil stored in the main body; a drive shaft that has therein a lubricating oil storage space into which the carried up lubricating oil is introduced and a lubricating oil discharge hole through which the lubricating oil in the lubricating oil storage space is supplied to a bearing unit; and a blocking member configured to block the lubricating oil discharge hole in accordance with a rotational speed of the drive shaft, wherein the blocking member opens the lubricating oil discharge hole when the drive shaft rotates at a low speed, and blocks the lubricating oil discharge hole when the drive shaft rotates at a high speed. ### Claim 2 (depends on 1) The driving force transmission device of the vehicle according to claim 1, wherein when the blocking member opens the lubricating oil discharge hole, the lubricating oil in the lubricating oil storage space is supplied to the bearing unit, and when the blocking member blocks the lubricating oil discharge hole, the lubricating oil is accumulated within the lubricating oil storage space. ### Claim 3 (depends on 2) The driving force transmission device of the vehicle according to claim 2, wherein the blocking member is disposed inside the lubricating oil storage space to block the lubricating oil discharge hole with a centrifugal force generated by a rotation of the drive shaft, and the driving force transmission device comprises an elastic member configured to perform biasing in a direction in which the blocking member is separated from the lubricating oil discharge hole. ### Claim 4 (depends on 3) The driving force transmission device of the vehicle according to claim 3, wherein the elastic member comprises a conical spring. ### Claim 5 (depends on 2) The driving force transmission device of the vehicle according to claim 2, wherein the lubricating oil storage space has an end that is open in an axial direction of the drive shaft, and the driving force transmission device comprises a rib on a wall surface of the main body, the rib guiding the carried up lubricating oil to the end. ### Claim 6 (depends on 5) The driving force transmission device of the vehicle according to claim 5, wherein the bearing unit comprises a bearing, the driving force transmission device comprises an annular bearing holder that protrudes from the wall surface of the main body and holds the bearing, and the carried up lubricating oil is introduced into a space inside the annular bearing holder from an opening provided in the annular bearing holder and is introduced into the lubricating oil storage space from the end. ### Claim 7 (depends on 6) The driving force transmission device of the vehicle according to claim 6, comprising: a guide member configured to guide the lubricating oil introduced into the space inside the annular bearing holder from the opening to an inside of the lubricating oil storage space. ### Claim 8 (depends on 2) The driving force transmission device of the vehicle according to claim 2, wherein the driving force gear comprises a helical gear. ### Claim 9 (depends on 3) The driving force transmission device of the vehicle according to claim 3, wherein the driving force gear comprises a helical gear. ### Claim 10 (depends on 1) The driving force transmission device of the vehicle according to claim 1, wherein the blocking member is disposed inside the lubricating oil storage space to block the lubricating oil discharge hole with a centrifugal force generated by a rotation of the drive shaft, and the driving force transmission device comprises an elastic member configured to perform biasing in a direction in which the blocking member is separated from the lubricating oil discharge hole. ### Claim 11 (depends on 10) The driving force transmission device of the vehicle according to claim 10, wherein the elastic member comprises a conical spring. ### Claim 12 (depends on 10) The driving force transmission device of the vehicle according to claim 10, wherein the driving force gear comprises a helical gear. ### Claim 13 (depends on 1) The driving force transmission device of the vehicle according to claim 1, wherein the lubricating oil storage space has an end that is open in an axial direction of the drive shaft, and the driving force transmission device comprises a rib on a wall surface of the main body, the rib guiding the carried up lubricating oil to the end. ### Claim 14 (depends on 13) The driving force transmission device of the vehicle according to claim 13, wherein the bearing unit comprises a bearing, the driving force transmission device comprises an annular bearing holder that protrudes from the wall surface of the main body and holds the bearing, and the carried up lubricating oil is introduced into a space inside the annular bearing holder from an opening provided in the annular bearing holder and is introduced into the lubricating oil storage space from the end. ### Claim 15 (depends on 14) The driving force transmission device of the vehicle according to claim 14, comprising: a guide member configured to guide the lubricating oil introduced into the space inside the annular bearing holder from the opening to an inside of the lubricating oil storage space. ### Claim 16 (depends on 1) The driving force transmission device of the vehicle according to claim 1, wherein the driving force gear comprises a helical gear. ### Claim 17 (depends on 1) The driving force transmission device of the vehicle according to claim 1, wherein the carrying up gear comprises a helical gear.