Power transmission device

Patent metadata

Field	Value
Publication number	US-9528404-B2
Application number	US-201314096173-A
Country	US
Kind code	B2
Filing date	Dec 4, 2013
Priority date	Dec 6, 2012
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

A power transmission device has a first check valve and a second check valve on the respective discharge passages. An oil temperature sensor is disposed at a position that is vertically lower than an oil-introducing portion of a merging section.

First claim

The invention claimed is:

1. A power transmitting device comprising:
a first discharge passage connected to a mechanical oil pump;
a second discharge passage connected to an electric oil pump;
a merging section connected to the first discharge passage and the second discharge passage such that oil from the first discharge passage is merged with oil from the second discharge passage, wherein the merging section includes an oil sump;
an oil-introducing portion connected to the merging section and an oil cooler, the oil-introducing portion introducing the oil from the merging section into the oil cooler, wherein the merging section is disposed at a position that is vertically lower than the oil-introducing portion;
a first check valve provided on the first discharge passage;
a second check valve provided on the second discharge passage;
an oil temperature sensor disposed in the oil sump; and
wherein the oil sump is located vertically below the entirety of the first and second discharge passages.

2. The power transmitting device according to claim 1 , further comprising:
a transmission mechanism; and
a housing accommodating the transmission mechanism, wherein
the mechanical oil pump is driven by an engine,
the electric oil pump is driven by an onboard battery, and
the mechanical oil pump and the electric oil pump pump up oil from inside the housing to supply the oil to the oil cooler, and supply the oil cooled in the oil cooler to the transmission mechanism.

Assignees

• Kimura Hiroaki
• Nishimine Akiko
• Kuwahara Takeshi
• Takayanagi Ryota
• Toyota Motor Co Ltd

Inventors

• Kimura Hiroaki
• Nishimine Akiko
• Kuwahara Takeshi
• Takayanagi Ryota

Classifications

• F16N2250/08

  Temperature · CPC title

• F01M5/002

  Cooling · CPC title

• F01M2005/026

  with an auxiliary pump · CPC title

• F01M11/10 Primary

  Indicating devices; Other safety devices · CPC title

• F16H57/0424 Primary

  Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes · CPC title