Engagement device and power transmission device

Patent metadata

Field	Value
Publication number	US-9816569-B2
Application number	US-201314771944-A
Country	US
Kind code	B2
Filing date	Mar 22, 2013
Priority date	Mar 22, 2013
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

An engagement device includes: an engaged body configured to rotate in conjunction with a rotary shaft; an engaging body arranged coaxially with the engaged body and configured to engage with the engaged body by movement in an axial direction; a power source configured to provide thrust to the engaging body in the axial direction; and a hub member configured to couple the engaging body to a torque receiver which receives torque transmitted from the engaged body at a time the engaging body engages with the engaged body. The engaged body, the engaging body, and the power source are accommodated in a closed space, and the hub member is at least a part of an outer shell forming the closed space.

First claim

The invention claimed is:

1. An engagement device comprising:
an engaged body configured to rotate in conjunction with a rotary shaft;
an engaging body arranged coaxially with the engaged body and configured to engage with the engaged body by movement in an axial direction;
a power source configured to provide thrust to the engaging body in the axial direction; and
a hub member configured to couple the engaging body to a torque receiver which receives torque transmitted from the engaged body at a time the engaging body engages with the engaged body, wherein
the engaged body, the engaging body, and the power source are accommodated in a closed space, and
the hub member is at least a part of an outer shell forming the closed space.

2. The engagement device according to claim 1 , wherein the outer shell forming the closed space is configured to cover at least a region on an outer side, in a radial direction, of an engaging portion between the engaging body and the engaged body.

3. The engagement device according to claim 1 , wherein
the engaging body is arranged around the rotary shaft,
the power source is arranged on an outer side of the engaging body in the radial direction,
the hub member includes an inner cylinder portion extending in an axial direction between the rotary shaft and the engaging body,
the engaging body is located on a peripheral surface of the inner cylinder portion of the hub member in a manner in which movement in the axial direction is allowed and rotation is regulated, and
the hub member has a shape extending radially outwardly from the inner cylinder portion while covering the engaging body and the power source.

4. The engagement device according to claim 1 , comprising an accumulating unit configured to accumulate a foreign object generated in the closed space.

5. A power transmission device comprising:
an engagement device on a power transmission path from a power source to a drive wheel, the engagement device including
an engaged body configured to rotate in conjunction with a rotary shaft;
an engaging body arranged coaxially with the engaged body and configured to engage with the engaged body by movement in an axial direction;
a power source configured to provide thrust to the engaging body in the axial direction; and
a hub member configured to couple the engaging body to a torque receiver which receives torque transmitted from the engaged body at a time the engaging body engages with the engaged body, wherein
the engaged body, the engaging body, and the power source are accommodated in a closed space, and
the hub member is at least a part of an outer shell forming the closed space.

6. The power transmission device according to claim 5 , comprising:
an engine;
a first rotary machine;
a power distributing mechanism connected to the engine and the first rotary machine and configured to distribute power of the engine to a drive wheel and the first rotary machine; and
a second rotary machine connected to the drive wheel, wherein
the engaging body of the engagement device is coupled to a rotary shaft of the first rotary machine, and
the engagement device is configured to regulate rotation of the first rotary machine by engaging the engaging body with the engaged body.

7. The power transmission device according to claim 5 , wherein the engagement device is a dog clutch.

8. The power transmission device according to claim 5 , wherein the outer shell forming the closed space is configured to cover at least a region on an outer side, in a radial direction, of an engaging portion between the engaging body and the engaged body.

9. The power transmission device according to claim 5 , wherein
the engaging body is arranged around the rotary shaft,
the power source is arranged on an outer side of the engaging body in the radial direction,
the hub member includes an inner cylinder portion extending in an axial direction between the rotary shaft and the engaging body,
the engaging body is located on a peripheral surface of the inner cylinder portion of the hub member in a manner in which movement in the axial direction is allowed and rotation is regulated, and
the hub member has a shape extending radially outwardly from the inner cylinder portion while covering the engaging body and the power source.

10. The power transmission device according to claim 5 , comprising an accumulating unit configured to accumulate a foreign object generated in the closed space.

Assignees

• Funato Yasumichi
• Hata Hiroshi
• Toyota Motor Co Ltd

Inventors

• Funato Yasumichi
• Hata Hiroshi

Classifications

• F16D11/14

  with clutching members movable only axially (F16D11/02, F16D11/08 take precedence) · CPC title

• F16D27/09 Primary

  and with interengaging jaws or gear-teeth · CPC title

• F16D2011/002

  using an external and axially slidable sleeve for coupling the teeth of both coupling components together · CPC title

• F16H37/0813

  with only one input shaft · CPC title

• F16D27/14

  Details · CPC title