Nakanishi Metal Works Co., Ltd.

Jtekt Corporation

Yoshio Horikawa

Yasuhiro Narazaki

Hiroshi Yano

Kohei Shibata

Shogo Fukada

Ikuhisa Maeda

A strut bearing includes an upper case, a lower case, an upper raceway ring held by the upper case, a lower raceway ring held by the lower case, and rolling elements that roll in a space between the upper raceway ring and the lower raceway ring. The upper case has an upper surface on which an annular recess is provided, and the annular recess contains an elastic member fitted thereinto. The elastic member includes a base in the recess and a protrusion protruding from the upper surface of the upper case.

Strut bearing and vehicle strut suspension

An upper raceway ring has an inward flange portion. A lower raceway ring has an outward flange portion. An upper case has an outwardly projecting piece projecting in the radially outward direction toward an end surface of the inward flange portion from a surface facing the end surface. A lower case has an inwardly projecting piece projecting in the radially inward direction toward an end surface of the outward flange portion from a surface facing the end surface. The end surface of the upper raceway ring comes into contact with the outwardly projecting piece of the upper case, to allow the upper raceway ring to be held by the upper case. The end surface of the lower raceway ring comes into contact with the inwardly projecting piece of the lower case, to allow the lower raceway ring to be held by the lower case.

Provided is a strut bearing including an upper case and a lower case that are made of a synthetic resin, and an engaging portion for preventing separation of components which are free from any stress exerted thereon during assembly. The strut bearing includes an outwardly-projecting piece row on an inner diameter side of an upper case, and an inwardly-projecting piece row on an inner diameter side of a lower case. Within a relative pivoting range of the upper and lower cases in a use state of the strut bearing, a detachment preventing engagement portion for preventing the upper and lower cases from being separated from each other in the axial direction is provided. Within a predetermined angle range outside the relative pivoting range, the detachment preventing engagement portion is not present.

The inner elastic sealing memberincludes an inner cylindrical base portionA leading to an end portion of an inner cylindrical portionB of the inner ring, and also includes, at an outer circumferential surface of the inner cylindrical base portionA, a projectionextending radially outward of an inner periphery of a lower end of an inner cylindrical portionB of the outer ring. The outer elastic sealing memberincludes a lipB brought into pressure contact with a pressure contact surface B of the outer ring. An upper surfaceA of the projectionis spaced downward from the lower end of the inner cylindrical portionB of the outer ring, and an outer circumferential surfaceC of the projectionis spaced radially inward from the lower member

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Osaka, Japan

Yoshio Horikawa