Power transmission device

Patent metadata

Field	Value
Publication number	US-12553513-B2
Application number	US-202318846955-A
Country	US
Kind code	B2
Filing date	Mar 23, 2023
Priority date	Mar 23, 2022
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

A power transmission device includes a housing that accommodates a power transmission mechanism, a partition section that is provided in the housing and that supports the power transmission mechanism, a first oil path that is provided inside the partition section, a second oil path that is provided inside the partition section, a recess that is provided in the partition section, and a filter member that is disposed inside the recess. The recess is provided with an opening facing a direction of an axis of rotation of the power transmission device. The first oil path and the second oil path communicate via the recess.

First claim

The invention claimed is:

1 . A power transmission device, comprising:
a housing that accommodates a power transmission mechanism; a partition section that is provided in the housing and that supports the power transmission mechanism; a first oil path that is provided inside the partition section and into which oil collected in the housing is suctioned by a strainer and then supplied; a second oil path that is provided inside the partition section; a recess that is provided in the partition section; and a filter member that is disposed inside the recess, wherein the recess is provided with an opening facing a direction of an axis of rotation of the power transmission device, and the first oil path and the second oil path communicate via the recess.

2 . The power transmission device according to claim 1 , wherein
in the direction of the axis of rotation of the power transmission device, the recess is defined by varying a thickness of the partition section.

3 . The power transmission device according to claim 1 , wherein
as viewed from the direction of the axis of rotation of the power transmission device, the recess is disposed between an axis of rotation of a first rotating body and an axis of rotation of a second rotating body which constitute the power transmission mechanism.

4 . The power transmission device according to claim 3 , wherein
the first rotating body is a primary pulley of a variator, the second rotating body is a secondary pulley of the variator, and as viewed from a radial direction of the axis of rotation of the power transmission device, the recess overlaps the variator.

5 . The power transmission device according to claim 4 , further comprising
a control unit configured to control an oil pressure supplied to the power transmission mechanism, wherein the control unit is provided in a direction aligned in a vertical direction based on an installation state of the power transmission device in a vehicle, and in the direction of the axis of rotation of the power transmission device, the recess is disposed between the control unit and the secondary pulley.

6 . The power transmission device according to claim 5 , further comprising
a rotation restriction mechanism configured to restrict rotation of the secondary pulley, wherein the primary pulley is positioned below the recess in the vertical direction, and on a control unit side of the recess, a first component of the rotation restriction mechanism is provided in a direction aligned in the direction of the axis of rotation of the power transmission device, and as viewed from the direction of the axis of rotation of the power transmission device, the first oil path extends diagonally from the control unit to the recess through a position that avoids interference with the primary pulley and the first component of the rotation restriction mechanism.

7 . The power transmission device according to claim 6 , wherein
as viewed from the direction of the axis of rotation of the power transmission device, a second component of the rotation restriction mechanism and the recess are provided in an overlapping positional relationship.

8 . The power transmission device according to claim 7 , wherein
in the direction of the axis of rotation of the power transmission mechanism, the filter member is positioned between the second component and the partition section.

9 . The power transmission device according to claim 4 , wherein
in the direction of the axis of rotation of the power transmission device, the filter member is positioned between the partition section and a belt wrapped around the primary pulley and the secondary pulley.

10 . The power transmission device according to claim 5 , wherein
the partition section divides a space inside the housing into a first chamber and a second chamber adjacent in the direction of the axis of rotation of the power transmission device, as viewed from the direction of the axis of rotation of the power transmission device, a flow path for oil for lubrication of the primary pulley and the secondary pulley opens near the recess on a second chamber side surface of the partition section, on a first chamber side surface of the partition section, the second oil path and the flow path open, and a communication groove connecting the second oil path and the flow path is formed, and a communication path linking the recess and the flow path is formed by a cover member attached to the first chamber side surface of the partition section and covering an opening of the second oil path, an opening of the flow path, and an opening of the communication groove.

11 . The power transmission device according to claim 10 , wherein
a branch path opening a section opposite the communication groove is provided inside the cover member, and oil that flows into the branch path is supplied to elements of the power transmission mechanism except for the first rotating body and the second rotating body.

12 . The power transmission device according to claim 10 , further comprising
a cover sealing the opening of the recess, wherein the recess opens into the second chamber.

13 . The power transmission device according to claim 12 , wherein
the cover is supported by the partition section.

14 . The power transmission device according to claim 12 , wherein
in the direction of the axis of rotation of the power transmission device, the cover is positioned between the partition section and a belt of the variator.

Assignees

• Jatco Ltd
• Nissan Motor

Inventors

• Yamashita Katsunori
• Yukawa hirohisa

Classifications

• F16H2057/02043

  for vehicle transmissions · CPC title

• F16H2057/02008

  characterised by specific dividing lines or planes of the gear case · CPC title

• F16H63/3416

  Parking lock mechanisms or brakes in the transmission · CPC title

• F16H57/045

  Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case · CPC title

• F16H57/0435

  Pressure control for supplying lubricant; Circuits or valves therefor · CPC title