Power transmission device

Patent metadata

Field	Value
Publication number	US-12416355-B2
Application number	US-202318846938-A
Country	US
Kind code	B2
Filing date	Mar 23, 2023
Priority date	Mar 23, 2022
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

A power transmission device for a vehicle includes a housing that accommodates a power transmission mechanism, a control valve configured to control an oil pressure supplied to the power transmission mechanism, a first pump and a second pump configured to supply oil to the control valve. The housing includes a first chamber that accommodates the power transmission mechanism and the first pump, and a second chamber that is arranged adjacent to the first chamber in a horizontal line direction. In the first chamber, the first pump is arranged such that an axis of rotation of the first pump extends along a direction of an axis of rotation of the power transmission mechanism. In the second chamber, the control valve is arranged upright. In the second chamber, the second pump is arranged upright with an axis of rotation of the second pump extending along a vertical direction.

First claim

The invention claimed is:

1. A power transmission device for a vehicle, comprising:
a housing that accommodates a power transmission mechanism;
a control valve configured to control an oil pressure supplied to the power transmission mechanism; and
a first pump and a second pump configured to supply oil to the control valve,
wherein the housing includes
a first chamber that accommodates the power transmission mechanism and the first pump, and
a second chamber that is arranged adjacent to the first chamber in a horizontal line direction,

in the first chamber, the first pump is arranged such that an axis of rotation of the first pump extends along a direction of an axis of rotation of the power transmission mechanism,
in the second chamber, the control valve is arranged upright, and
in the second chamber, the second pump is arranged upright with an axis of rotation of the second pump extending along a vertical direction.

2. The power transmission device according to claim 1 , wherein
the control valve and the second pump are aligned in the direction of the axis of rotation of the power transmission mechanism in the second chamber.

3. The power transmission device according to claim 2 , wherein
the second chamber is located toward a front of the vehicle as viewed from the first chamber,
as viewed from the front of the vehicle, the control valve has a cut-out, and
as viewed from the front of the vehicle, the second pump is arranged at least partially in the cut-out.

4. The power transmission device according to claim 3 , wherein
as viewed from the front of the vehicle, the cut-out is provided at a bottom of the control valve, and
as viewed from one side in the vertical direction, the second pump and the control valve are provided in an overlapping positional relationship.

5. The power transmission device according to claim 4 , wherein
the second pump includes
a motor unit housing a motor, and
a pump unit configured to suction and pressurize the oil using a rotational force of the motor,

the motor unit and the pump unit are aligned in a direction of the axis of rotation of the second pump,
as viewed from the front of the vehicle, the second pump is provided so that an axis of rotation of the motor extends along a direction orthogonal to the axis of rotation of the power transmission mechanism.

6. The power transmission device according to claim 5 , wherein
the pump is located below the motor unit.

7. The power transmission device according to claim 1 , further comprising
a strainer provided in the first chamber, wherein
the first pump and the second pump share the strainer.

8. The power transmission device according to claim 7 , wherein
as viewed from the front of the vehicle, the control valve is provided in a positional relationship overlapping the first pump and the strainer.

Assignees

• Jatco Ltd
• Nissan Motor

Inventors

• Yamashita Katsunori
• Yukawa hirohisa
• Kouya Masahiro
• Ikeda Tomoo
• Kojima Kenji
• Higashiyama Akira
• Yumoto Yasuaki
• Itou Tsutomu
• Numata Kazuya
• Kawahara Junnosuke
• Akiyama Kazunori

Classifications

• F16H57/0441

  Arrangements of pumps · CPC title

• F16H57/0439

  using multiple pumps with different power sources or a single pump with different power sources, e.g. one and the same pump may selectively be driven by either the engine or an electric motor · CPC title

• F16H57/0402

  Cleaning of lubricants, e.g. filters or magnets · CPC title

• F16H57/0489

  with endless flexible members, e.g. belt CVTs · CPC title

• F16H57/0424

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