Stator wheel of torque converter and torque converter

Patent metadata

Field	Value
Publication number	US-10132396-B2
Application number	US-201614993456-A
Country	US
Kind code	B2
Filing date	Jan 12, 2016
Priority date	Jan 13, 2015
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

A stator wheel, located between a pump and a turbine of a torque converter, includes: a first annular portion configured to be rotatable about a center of rotation; a second annular portion away from the first annular portion in a radial direction of the first annular portion; and blades provided at intervals in a circumferential direction of the first annular portion, extending between the first and second annular portions in the radial direction of the first annular portion, extending toward one side in the circumferential direction as it goes in an axial direction of a rotational shaft, being formed integrally with the first and second annular portions, and including a first surface provided on one side in the circumferential direction and a second surface located on an opposite side from the first surface in the circumferential direction configured to receive pressure from the operating fluid flowing from the turbine.

First claim

What is claimed is:

1. A stator wheel for a torque converter including a pump configured to be rotatable in response to an input of torque from a motor and to cause operating fluid to flow by rotation; and a turbine configured to be rotatable in response to an input of torque from the pump via the flowing operating fluid, and to be capable of outputting the torque to a rotational shaft by rotation thereof, the stator wheel being configured to be located between the pump and the turbine, and comprising:
a first annular portion configured to be rotatable about a center of rotation extending in an axial direction;
a second annular portion away from the first annular portion in a radial direction of the first annular portion; and
a plurality of blades provided at intervals in a circumferential direction of the first annular portion, the plurality of blades each extending between the first annular portion and the second annular portion in the radial direction of the first annular portion, extending in a direction inclined circumferentially with respect to the axial direction, being formed integrally with the first annular portion and the second annular portion, and including a first surface provided on one side in the circumferential direction of the first annular portion and a second surface located on an opposite side from the first surface in the circumferential direction of the first annular portion and configured to receive pressure, which is lower than that the first surface receives, from the operating fluid flowing from the turbine toward the pump in a state in which the pump rotates and the turbine is standstill,
wherein a radius of curvature of a first connecting portion which is a portion where the first surface and the first annular portion are connected at an end portion on one side of one of the plurality of blades in the circumferential direction of the first annular portion on a virtual plane orthogonal to the axial direction of the rotational shaft is larger than a radius of curvature of a second connecting portion which is a portion where the second surface and the first annular portion are connected at an end portion on an other side in the circumferential direction of the first annular portion of an other of the plurality of blades adjacent to the one of the plurality of blades on the one side in the circumferential direction of the first annular portion on a virtual plane orthogonal to the axial direction of the rotational shaft, and
wherein a radius of curvature of a third connecting portion which is a portion where the first surface and the second annular portion are connected at an end portion on the one side of the one blade in the circumferential direction of the first annular portion on a virtual plane orthogonal to the axial direction of the rotational shaft is lamer than a radius of curvature of a fourth connecting portion which is a portion where the second surface and the second annular portion are connected at an end portion on the other side in the circumferential direction of the first annular portion of the other blade adjacent to the one blade on the one side in the circumferential direction of the first annular portion on a virtual plane orthogonal to the axial direction of the rotational shaft.

2. The stator wheel according to claim 1 ,
wherein a length of the blade in the circumferential direction of the first annular portion is longer than a length obtained by subtracting twice a length of the first connecting portion in the circumferential direction of the first annular portion and a distance between the first connecting portion and the second connecting portion in the circumferential direction of the first annular portion from a length obtained by dividing the circumference of an outer peripheral surface of the first annular portion by the number of blades.

3. The stator wheel according to claim 1 , wherein shapes of the first and second connecting portions on a virtual plane orthogonal to the axial direction of the rotational shaft are concave.

Assignees

• Aisin Seiki

Inventors

• Tsuzuki Yukihisa

Classifications

• F16H41/26

  Shape of runner blades or channels with respect to function · CPC title

• F16H41/04 Primary

  Combined pump-turbine units · CPC title

• F16H41/28

  with respect to manufacture, e.g. blade attachment · CPC title