# US 9,518,647 B2 · Lubricating device of automatic transmission

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- Number: US 9,518,647 B2
- Document ID: US9518647B2
- Status: Granted
- Kind: B2
- Application number: 14/232,996
- Filed: 2011-12-21
- Published: 2014-06-19
- Granted: 2016-12-13
- Earliest claimed: 2011-12-21
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Tomoaki Yanagida; Takaho Kawakami
- Inventors: Tomoaki Yanagida; Takaho Kawakami
- Web page: https://patentgrep.com/patent/US9518647B2

## CPC

- F16H 57/0473: {Friction devices, e.g. clutches or brakes}
- F16H 57/0479: {Gears or bearings on planet carriers}
- F16H 57/0484: {with variable gear ratio or for reversing rotary motion}
- F16H: GEARING

## Abstract

A lubricating device of an automatic transmission includes a partitioning member that partitions an oil chamber, to which a lubricating oil of a first oil chamber is introduced; a second oil chamber partitioned by the partitioning member and to which lubricating oil to supply to a forward clutch is introduced; and a third oil chamber partitioned by the partitioning member and to which lubricating oil to supply to a pinion unit such as a pinion gear coupled with one engagement unit of the forward clutch is introduced; wherein a clutch oil path that introduces the lubricating oil of the first oil chamber to the second oil chamber and a pinion oil path that introduces the lubricating oil of the first oil chamber to the third oil chamber are formed in a clutch drum interposed between the first oil chamber and the oil chamber.

## Claims

### Claim 1

A lubricating device of an automatic transmission comprising:
a first oil chamber, to which a lubricating oil is introduced;
a partitioning member configured to partition a space, to which the lubricating oil of the first oil chamber is introduced;
a second oil chamber partitioned by the partitioning member and to which a lubricating oil to supply to a forward clutch is introduced; and
a third oil chamber partitioned by the partitioning member and to which a lubricating oil to supply to a pinion unit coupled with one engagement unit of the forward clutch is introduced, wherein
a clutch oil path that introduces the lubricating oil of the first oil chamber to the second oil chamber and a pinion oil path that introduces the lubricating oil of the first oil chamber to the third oil chamber are formed in a member interposed between the first oil chamber and the space in which the partitioning member is arranged, and
an oil path switching member that opens the clutch oil path and interrupts the pinion oil path at time of engagement of the forward clutch, and that interrupts the clutch oil path and opens the pinion oil path at time of release of the forward clutch is arranged.

### Claim 2 (depends on 1)

The lubricating device of the automatic transmission according to claim 1, wherein
the oil path switching member performs oil path switching at the time of engagement of the forward clutch by using a hydraulic pressure for clutch engagement of the forward clutch.

### Claim 3 (depends on 2)

The lubricating device of the automatic transmission according to claim 2, wherein
the automatic transmission is mounted on a vehicle coasting under no power conditions.

### Claim 4 (depends on 1)

The lubricating device of the automatic transmission according to claim 1, wherein
the automatic transmission is mounted on a vehicle coasting under no power conditions.

### Claim 5 (depends on 1)

The lubricating device of the automatic transmission according to claim 1, wherein
the second oil chamber is connected to a first oil path that introduce the lubricating oil of the second oil chamber to the forward clutch,
the second oil chamber is arranged between the first oil chamber and the first oil path,
the third oil chamber is connected to a second oil path that introduce the lubricating oil of the third oil chamber to the pinion unit, and
the third oil chamber is arranged between the first oil chamber and the first oil path.