STATOR WHEEL OF TORQUE CONVERTER AND TORQUE CONVERTER

摘要

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.

主权项

1. A stator wheel of 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 and to be connectable to a rotational shaft in response to an input of torque from the pump via the flowing operating fluid, and to be capable of output the torque to the rotational shaft by rotation thereof,the stator wheel being located between the pump and the turbine, and comprising: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; anda 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 toward one side in the circumferential direction of the first annular portion as it goes in an axial direction of the rotational shaft, 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 the other side in the circumferential direction of the first annular portion of the other blade adjacent to the one blade on one side in the circumferential direction of the first annular portion on a virtual plane orthogonal to the axial direction of the rotational shaft.