Constant velocity joint and manufacturing method therefor
AssigneeHonda Motor Co., Ltd.
InventorMitsuru Kamikawa
Life of this patent
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Abstract
A first constant velocity joint is equipped with a cup part made of a light alloy. First ball grooves that receive a torque from torque transmitting members are formed on an inner wall of the cup part. A high hardness layer made of ceramic or cermet as a principal component thereof is formed on an inner surface of the cup part including at least inner surfaces of the first ball grooves.
Claims10
A constant velocity joint comprising an outer member including a cup part and a shaft, an inner member inserted into the outer member, and a torque transmitting member configured to carry out transmission of torque and interposed between the outer member and the inner member;
- wherein
- the shaft is made of steel,
- the cup part is made of a light alloy in which a bottomed hole is formed,
- the cup part has an inner wall on which a groove is formed, the groove receives the torque from the torque transmitting member, and the cup part further comprises a high hardness layer made up from a multilayer structure made of ceramic or cermet as a principal component thereof on an inner surface of the cup part including at least an inner surface of the groove and an inner bottom surface of the bottomed hole, and the high hardness layer is a thermally sprayed layer.
A manufacturing method for a constant velocity joint comprising an outer member including a cup part made of a light alloy and a shaft made of steel, an inner member inserted into the outer member, and a torque transmitting member configured to carry out transmission of torque and interposed between the outer member and the inner member, the manufacturing method comprising:
- a high hardness layer forming step of forming a groove that receives the torque from the torque transmitting member on an inner wall of the cup part in which a bottomed hole is formed, and forming a high hardness layer made up from a multilayer structure made of ceramic or cermet as a principal component thereof on an inner surface of the cup part including at least an inner surface of the groove and an inner bottom surface of the bottomed hole, wherein the high hardness layer is a thermally sprayed layer.
Dependencies are inferred from the claim text.