# US 10,502,261 B2 · Vehicular power transmission device

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- Number: US 10,502,261 B2
- Document ID: US10502261B2
- Status: Granted
- Kind: B2
- Application number: 15/722,207
- Filed: 2017-10-02
- Published: 2018-04-12
- Granted: 2019-12-10
- Earliest claimed: 2016-10-06
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Koichi Kato; Shinichi Baba; Shinichiro Suenaga; Iori Matsuda; Michitaka Tsuchida; Akiko Nishimine
- Web page: https://patentgrep.com/patent/US10502261B2

## CPC

- F16C 19/385: {with two rows, i.e. double-row tapered roller bearings}
- B60K 6/383: One-way clutches or freewheel devices
- B60K 6/445: Differential gearing distribution type
- F16C 19/547: {with two angular contact rolling bearings}
- F16C 33/585: {of raceways, e.g. ribs to guide the rollers}
- F16C 35/042: {Housings for rolling element bearings for rotary movement}
- F16C 39/02: using mechanical means
- F16H 3/727: {with at least two dynamo electric machines for creating an electric power path inside the gearing, e.g. using generator and motor for a variable power torque path}
- B60Y 2200/92: Hybrid vehicles
- B60Y 2410/102: Shaft arrangements; Shaft supports, e.g. bearings
- F16C 19/364: {with tapered rollers, i.e. rollers having essentially the shape of a truncated cone}
- F16C 2226/00: Joining parts; Fastening; Assembling or mounting parts
- F16C 2229/00: Setting preload
- F16C 2326/06: Drive shafts
- F16C 2361/61: Toothed gear systems, e.g. support of pinion shafts
- Y02T 10/62: Hybrid vehicles
- Y10S 903/902: Prime movers comprising electrical and internal combustion motors
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- 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
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A concave portion provided in at least one of the first assembled surface, and other assembled surfaces for fastening the driving force source, in the region corresponding to the outer race of the tapered roller bearing, the other assembled surfaces provided to one of the fixed component and the driving force source.

## Claims

### Claim 1

A vehicular power transmission device comprising:
a driving force source;
a tapered roller bearing;
a case member including an end surface, the end surface including a convex streak provided with a first assembled surface, a part of the convex streak provided on the end surface such that the part of the convex streak passes through a region corresponding to an outer race of the tapered roller bearing; a rotary shaft that transmits a driving force from the driving force source, the rotary shaft being supported in a rotating manner in a circumferential direction of the rotary shaft via the tapered roller bearing while being pressurized in a direction of a rotational centerline of the rotary shaft, in the case member, and one end of the rotary shaft being supported in a rotating manner by the end surface of the case member via the tapered roller bearing;
a fastened state where the driving force source is fastened to the first assembled surface being one of a state where the driving force source is fastened to the first assembled surface via a fixed component, and a state of where the driving force source is directly fastened to the first assembled surface; and
a concave portion provided in at least one of the first assembled surface, and other assembled surfaces for fastening the driving force source, in the region corresponding to the outer race of the tapered roller bearing, the other assembled surfaces provided to one of the fixed component and the driving force source.

### Claim 2 (depends on 1)

The vehicular power transmission device according to claim 1, wherein
the driving force source is fastened to the first assembled surface via the fixed component,
the fixed component is a plate-shaped component that is interposed between the driving force source and the end surface of the case member, the plate-shaped component includes a second assembled surface facing the first assembled surface at a side of the case member, and a third assembled surface provided at a side of the driving force source, the driving force source includes a fourth assembled surface facing the third assembled surface at a side of the plate-shaped component, and
the concave portion is provided in at least one of the first assembled surface, the second assembled surface, the third assembled surface, and the fourth assembled surface.

### Claim 3 (depends on 1)

The vehicular power transmission device according to claim 1, wherein
the driving force source is directly fastened to the first assembled surface,
the driving force source includes a fourth assembled surface facing the first assembled surface at a side of the case member, and
the concave portion is provided in at least one of the first assembled surface and the fourth assembled surface.

### Claim 4 (depends on 1)

The vehicular power transmission device according to claim 1, wherein the concave portion is 100 to 300 μm in depth.