Power transmission device

Patent metadata

Field	Value
Publication number	US-12480573-B2
Application number	US-202318846965-A
Country	US
Kind code	B2
Filing date	Mar 23, 2023
Priority date	Mar 23, 2022
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

A power transmission device includes a case that houses a power transmission mechanism, a control valve configured to control an oil pressure supplied to the power transmission mechanism, and an electric pump configured to supply oil to the control valve. The case has a first chamber that houses the power transmission mechanism, and a second chamber that is arranged adjacent to the first chamber. The control valve and the electric pump are arranged upright in the second chamber. In the case, a first recess that is recessed from above the electric pump toward the electric pump is formed in a region that overlaps the electric pump, as viewed from above along an axis of rotation of the electric pump, and a connector of the electric pump is arranged such that a connection part with a mating connector faces up in the first recess.

First claim

The invention claimed is:

1 . A power transmission device, comprising:
a case that houses a power transmission mechanism; a control valve configured to control an oil pressure supplied to the power transmission mechanism; and an electric pump configured to supply oil to the control valve, wherein the case has a first chamber that houses the power transmission mechanism, and a second chamber that is arranged adjacent to the first chamber, the control valve and the electric pump are arranged upright in the second chamber, in the case, a first recess that is recessed from above the electric pump toward the electric pump is formed in a region that overlaps the electric pump, as viewed from above along an axis of rotation of the electric pump, and a connector of the electric pump is arranged such that a connection part with a mating connector faces up in the first recess.

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

3 . The power transmission device according to claim 2 , wherein
the electric pump has a vertical length that is shorter than a vertical length of the control valve.

4 . The power transmission device according to claim 2 , wherein
in the case, a second recess is provided in a region overlapping the control valve, as viewed from a direction of the axis of rotation of the electric pump, in the second recess, a control connector of the electric pump is disposed so that a connection part with a mating connector faces a side opposite the electric pump, and the connector arranged in the first recess is a power supply connector for the electric pump.

5 . The power transmission device according to claim 4 , wherein
the first recess and the second recess are provided staggered in the direction of the axis of rotation of the power transmission device.

6 . The power transmission device according to claim 4 , wherein
the case has
a circumferential wall section that surrounds an outer circumference of the second chamber, and
a cover section that seals an opening in the circumferential wall section, and
the first recess is provided in the circumferential wall section, and the second recess is provided in the cover section.

7 . The power transmission device according to claim 1 , wherein
the case has
a support wall that supports an axis of rotation of the power transmission mechanism, and
a partition wall that partitions the first chamber and the second chamber on one side of the support wall,
the partition wall extends from the other side of the support wall to a side of a third chamber, and as viewed from a radial direction of the axis of rotation of the power transmission mechanism, in the partition wall, a region that overlaps the first chamber is a first region to which the control valve is attached, a region that overlaps the third chamber is a second region to which the electric pump is attached, and an attachment hole for the connector arranged inside the first recess is open in a top section of the second region.

8 . The power transmission device according to claim 7 , wherein
as viewed from the radial direction of the axis of rotation of the power transmission mechanism, in the second region, a region that overlaps the electric pump constitutes a bulging part that bulges toward the third chamber, and a top of the bulging part is the first recess.

9 . The power transmission device according to claim 8 , wherein
as viewed from the direction of the axis of rotation of the electric pump, the bulging part bulges up to a position that overlaps the third chamber.

Assignees

• Jatco Ltd
• Nissan Motor

Inventors

• Yamashita Katsunori
• Yukawa hirohisa
• Kouya Masahiro
• Ikeda Tomoo

Classifications

• F16H2057/02052

  Axle units; Transfer casings for four wheel drive · CPC title

• F16H2057/02034

  Gearboxes combined or connected with electric machines · CPC title

• F16H57/0495

  with fixed gear ratio · CPC title

• F16H57/0489

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

• F16H57/0483 Primary

  Axle or inter-axle differentials · CPC title