Vane wheel for torque converter and manufacturing method
AssigneeNissan Motor Co., Ltd.
InventorsAkihiko Sano, Yoshitaka Miura, Tsutomu Kamitani
Life of this patent
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Abstract
A vane wheel for torque converter with a plurality of blades formed integrally with a shell in a casting process is disclosed. The blade tilts relative to an axial direction of the vane wheel and has an inner surface located on a positive pressure side thereof and an outer surface located on a negative pressure side thereof. A root thickness in a middle section between an outer periphery side and an inner periphery side of the shell is thicker than a root thickness on the inner periphery side relative to a blade cross section along a circumferential direction from an axis center of the vane wheel.
Claims13
A vane wheel for torque converter comprising:
- a plurality of blades formed integrally with a shell in a casting process,
- wherein said blade tilts relative to an axial direction of the vane wheel and has an inner surface located on a positive pressure side thereof and an outer surface located on a negative pressure side thereof,
- wherein a root thickness in a middle section between an outer periphery side and an inner periphery side of said shell is thicker than a root thickness on the inner periphery side relative to a blade cross section along a circumferential direction from an axis center of the vane wheel.
A method of manufacturing a vane wheel for torque converter having a shell and a plurality of blades in a casting process by means of a mold assembly,
- wherein said mold assembly comprises a stationary die having a cavity surface that corresponds to an outer periphery of the shell and a movable die having a cavity surface that corresponds to an outer surface of the blade,
- wherein said movable die is rotatable freely around an axis center of the vane wheel and movable freely along an axial direction of the vane wheel,
- wherein said blade tilts relative to the axial direction of the vane wheel and has an inner surface located on a positive pressure side thereof and an outer surface located on a negative pressure side thereof, and
- wherein a root thickness in a middle section between an outer periphery side and an inner periphery side of said shell is thicker than a root thickness on the inner periphery side relative to a blade cross section along a circumferential direction from the axis center of the vane wheel,
- said method comprising:
- separating the movable die from the stationary die by moving the movable die along the axial direction of the vane wheel while rotating the movable die around the axis center of the vane wheel after the casting process.
Dependencies are inferred from the claim text.