Breather device

Patent metadata

Field	Value
Publication number	US-11073199-B2
Application number	US-202016929156-A
Country	US
Kind code	B2
Filing date	Jul 15, 2020
Priority date	Jul 17, 2019
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

A breather device that communicates an inside of a case with an outside of the case in a vertical direction includes a cylindrical body having a hollow portion that extends in the vertical direction, a stopper inserted in the hollow portion, and a blocking body that is located in a space defined by the stopper in the hollow portion, and blocks a communicating hole provided in a lower part of the cylindrical body as viewed in the vertical direction. The communicating hole ceases to be blocked when the pressure inside the case exceeds a first predetermined value, and the blocking body moves upward in the vertical direction in the space.

First claim

What is claimed is:

1. A breather device that communicates an inside of a case with an outside of the case in a vertical direction, the breather device comprising:
a main body having a through portion that extends through the main body in the vertical direction;
a cylindrical body in the through portion having a hollow portion that extends in the vertical direction, the cylindrical body configured to move in the vertical direction relative to the through portion;
a stopper inserted in the hollow portion; and
a blocking body that is located in a space defined by the stopper in the hollow portion, and blocks a communicating hole provided in a lower part of the cylindrical body as viewed in the vertical direction, wherein
the communicating hole ceases to be blocked when a pressure inside the case exceeds a first predetermined value, and the blocking body moves upward in the vertical direction in the space.

2. The breather device according to claim 1 , wherein the cylindrical body includes an inclined portion having a diameter that increases as an upward distance from the communicating hole in the vertical direction increases, and the blocking body is a spherical body having a larger diameter than the communicating hole, the blocking body being configured to block the communicating hole when the blocking body sinks along the inclined portion.

3. The breather device according to claim 1 , wherein
the communicating hole is configured to be blocked when the pressure inside the case exceeds a second predetermined value that is higher than the first predetermined value, and the cylindrical body moves upward in the vertical direction.

4. The breather device according to claim 3 , wherein the communicating hole has a smaller diameter than a portion of the hollow portion in which the stopper is fitted.

5. The breather device according to claim 4 , wherein the diameter of the communicating hole is equal to or larger than one millimeter.

6. The breather device according to claim 3 , wherein a volume of the space is reduced as the cylindrical body moves upward in the vertical direction.

7. The breather device according to claim 1 , wherein the case is an oil pipe to which oil having an oil pressure increased by an oil pump is delivered.

8. The breather device according to claim 1 , wherein the case is an oil chamber case of an oil chamber in an actuator that controls a brake for a transmission.

9. A breather device that communicates an inside of a case with an outside of the case in a vertical direction, the breather device comprising:
a cylindrical body having a hollow portion that extends in the vertical direction, the cylindrical body configured to move in the vertical direction;
a stopper inserted in the hollow portion;
a blocking body that is located in a space defined by the stopper in the hollow portion, and blocks a communicating hole provided in a lower part of the cylindrical body as viewed in the vertical direction; and
a return spring that presses an upper part of the cylindrical body and that biases the cylindrical body, wherein
the communicating hole ceases to be blocked when a pressure inside the case exceeds a first predetermined value, and the blocking body moves upward in the vertical direction in the space.

Assignees

• Toyota Motor Co Ltd
• Aisin Aw Co

Inventors

• Tan Guodong
• Ito Shinichi
• Ideshio Yukihiko
• Ikemura Masashi
• Iijima Takashi
• Yamaguchi Masamichi
• Tanaka Keisuke
• Yamaguchi Tetsuya
• Yoshimoto Ryota

Classifications

• B60K6/445

  Differential gearing distribution type · CPC title

• F16H57/02 Primary

  Gearboxes; Mounting gearing therein · CPC title

• F16H2057/02043

  for vehicle transmissions · CPC title

• F16H2200/0043

  the gear ratios comprising four forward speeds · CPC title

• F16H2200/2066

  using one freewheel mechanism · CPC title