Hitachi Astemo Ltd.

Hitachi Automotive Systems, Ltd.

Xiaojin Zhu

Kenichiro Ishikura

Yasutomo Mabe

Toshiyuki Masuda

Hiromichi Komai

Kiyokazu Nakane

Kenichi Sugiyama

A propeller shaft () that is a power transmission shaft has a shaft member () as a tubular body made of iron-based metal and a balance weight () made of iron-based metal and welded to an outer peripheral surface of this shaft member (). At least a part of the balance weight () of the propeller shaft () is covered with a sacrificial metal coating () made of sacrificial corrosion prevention material that contains metal whose ionization tendency is higher than that of metal forming the shaft member (). With this, it is possible to suppress local progression of corrosion at a periphery of the balance weight () and improve durability of the propeller shaft ().

Power transmission shaft and method for manufacturing same

A propeller shaft (PS) has a balance piece () on the outer peripheral side of a stub shaft body section () of a stub shaft (), which is axially separated from both spline sections (), which are spline fitting sections. Due to this configuration, changes in the gap in both spline sections () when the balance piece () is welded are minimized, and the occurrence of new rotational imbalance can be minimized. As a result, rotational imbalance in the propeller shaft (PS) due to the balance piece () can be corrected appropriately and easily.

Power transmission shaft

A power transmission shaft includes: a bearing including a cylindrical portion, an internal spline portion, and an internal spline side annular groove including a bottom surface, and a first side wall and a second side wall, the first side wall which includes a first inclination surface inclined with respect to the rotation axis of the shaft portion, and on which the circlip is abutted in a state where a radius of the circlip is decreased within the internal spline side annular groove, and the second side wall on which the circlip is abutted in the state where the radius of the circlip is decreased within the internal spline side annular groove.

A power transmission shaft is interposed between a first shaft section and a second shaft section. The power transmission shaft comprises: a cylindrical section rotated integrally with a shaft section and formed cylindrically; a through hole disposed in the cylindrical section and penetrated radially with respect to a rotational axial line, each of a pair of vehicle side rotational shaft sections having an engagement groove disposed on an outer peripheral side of the pair of vehicle side rotational shaft sections and extended in a direction around the rotational axial line and the engagement groove being exposed from the through hole; and a retaining ring (circlip) disposed to enclose at least a portion of the outer peripheral side of the cylindrical section, a portion of the retaining ring being inserted into the through hole from the outer peripheral side of the cylindrical section and being engaged with the engagement groove.

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Atsugi, Japan

Xiaojin Zhu