# US 2019/0376594 A1 · Vehicle transfer

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- Number: US 2019/0376594 A1
- Document ID: US20190376594A1
- Status: Published application
- Kind: A1
- Application number: 16/430,797
- Filed: 2019-06-04
- Published: 2019-12-12
- Earliest claimed: 2018-06-08
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Takahide KOBAYASHI
- Web page: https://patentgrep.com/patent/US20190376594A1

## CPC

- F16H 57/027: characterised by means for venting gearboxes, e.g. air breathers
- B60K 17/02: characterised by arrangement, location, or kind of clutch
- B60K 17/34: for driving both front and rear wheels, e.g. four wheel drive vehicles
- B60K 17/344: having a transfer gear
- B60K 17/35: including arrangements for suppressing or influencing the power transfer, e.g. viscous clutches
- B60K 17/3515: {with a clutch adjacent to traction wheel, e.g. automatic wheel hub}
- B60K 23/0808: {for varying torque distribution between driven axles, e.g. by transfer clutch}
- F16H 57/04: Features relating to lubrication or cooling {or heating} (control of lubrication or cooling in hydrostatic gearing F16H61/4165)
- F16H 57/0421: {on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like}
- B60K 2023/0833: {for adding torque to the rear wheels}
- 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

## Abstract

A vehicle transfer comprises: a ring gear and a pinion gear; a transfer casing; and a bearing. The transfer casing includes a breather chamber that is partitioned by a partition wall with respect to a gear chamber and that is allowed to communicate with the gear chamber through a communication hole formed in the partition wall to adjust a pressure in the transfer casing, and a lubricating oil passage for supplying the oil to the bearing. The communication hole is disposed at a position to which the oil scooped up by the pinion gear is directed, and the vehicle transfer includes an oil receiver including a vertical wall portion preventing the oil scooped up by the pinion gear from flowing into the communication hole and a horizontal wall portion capturing the oil scooped up by the pinion gear and causing the captured oil to flow toward the lubricating oil passage.

## Claims

### Claim 1

A vehicle transfer comprising: a ring gear and a pinion gear orthogonally arranged and meshed with each other for transmitting a power; a transfer casing housing the ring gear and the pinion gear and enclosing an oil; and a bearing rotatably supporting the pinion gear on the transfer casing, wherein
the transfer casing includes therein a breather chamber that is partitioned by a partition wall with respect to a gear chamber housing the pinion gear and that is allowed to communicate with the gear chamber through a communication hole formed in the partition wall to adjust a pressure in the transfer casing, and a lubricating oil passage for supplying the oil to the bearing, wherein
the communication hole is disposed at a position to which the oil scooped up by the pinion gear is directed, and wherein
the vehicle transfer includes an oil receiver including a vertical wall portion preventing the oil scooped up by the pinion gear from flowing into the communication hole and a horizontal wall portion capturing the oil scooped up by the pinion gear and causing the captured oil to flow toward the lubricating oil passage.

### Claim 2 (depends on 1)

The vehicle transfer according to claim 1, wherein
the transfer casing is provided with an oil receiving portion connected to the lubricating oil passage and receiving the oil captured by the horizontal wall portion, and wherein
the horizontal wall portion is provided with a guide portion guiding the captured oil to the oil receiving portion.

### Claim 3 (depends on 2)

The vehicle transfer according to claim 2, wherein
the horizontal wall portion is inclined downward relative to a horizontal line as the horizontal wall portion extends toward the side provided with the guide portion.

### Claim 4 (depends on 1)

The vehicle transfer according to claim 1, wherein
the oil receiver is disposed on a cover disposed at the position to which the oil scooped up by the pinion gear is directed, wherein
the vertical wall portion is disposed to face the pinion gear, wherein
the communication hole is located on a back side of a wall surface of the vertical wall portion facing the pinion gear, and wherein
the horizontal wall portion is extended perpendicularly from the wall surface of the vertical wall portion.

### Claim 5 (depends on 2)

The vehicle transfer according to claim 2, wherein
the oil receiver is disposed on a cover disposed at the position to which the oil scooped up by the pinion gear is directed, wherein
the vertical wall portion is disposed to face the pinion gear, wherein
the communication hole is located on a back side of a wall surface of the vertical wall portion facing the pinion gear, and wherein
the horizontal wall portion is extended perpendicularly from the wall surface of the vertical wall portion.

### Claim 6 (depends on 3)

The vehicle transfer according to claim 3, wherein
the oil receiver is disposed on a cover disposed at the position to which the oil scooped up by the pinion gear is directed, wherein
the vertical wall portion is disposed to face the pinion gear, wherein
the communication hole is located on a back side of a wall surface of the vertical wall portion facing the pinion gear, and wherein
the horizontal wall portion is extended perpendicularly from the wall surface of the vertical wall portion.

### Claim 7 (depends on 4)

The vehicle transfer according to claim 4, wherein
the breather chamber is formed by being surrounded by a recess portion that is formed in a wall surface of the partition wall on a back side of a wall surface facing the gear chamber and that is connected to the communication hole and the cover attached to the wall surface on the back side.

### Claim 8 (depends on 5)

The vehicle transfer according to claim 5, wherein
the breather chamber is formed by being surrounded by a recess portion that is formed in a wall surface of the partition wall on a back side of a wall surface facing the gear chamber and that is connected to the communication hole and the cover attached to the wall surface on the back side.

### Claim 9 (depends on 6)

The vehicle transfer according to claim 6, wherein
the breather chamber is foiiiied by being surrounded by a recess portion that is formed in a wall surface of the partition wall on a back side of a wall surface facing the gear chamber and that is connected to the communication hole and the cover attached to the wall surface on the back side.