Daido Metal Company Ltd.

Honda Motor Co., Ltd.

Daldo Metal Company Ltd.

Mikio Suzuki

Yuto Otsuki

Hideo Nakamura

Takayuki Shibayama

Hideo Ishikawa

Satoshi Imai

Nobutaka Hiramatsu

Kentaro Komori

Daijiro Endo

Yutaka Okamoto

Masato Kushiya

Mitsuharu Sahashi

An object of the present invention is to provide a vibration damping device including a bearing member capable of achieving simplification of configuration in the vibration damping device, reducing frictional force during operation, and having an excellent wear resistance. A vibration damping device of the present invention includes a bearing structure, in which a metal bush (bearing member) has a resin layer on a side defined as a friction sliding surface of a base member, the resin layer includes polytetrafluoroethylene and a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin, and the metal bush is lubricated by a magneto-rheological fluid composition.

Bearing member, and vibration damping device using same

A half bearing for a crankshaft of an internal combustion engine, which includes crush relieves at both circumferential end portions of an inner circumferential surface of the half bearing, is provided. The half bearing further includes an axial groove at least at a position adjacent to a crush relief on a rear side of a relative rotation direction of the crankshaft, and adjacent to the inner circumferential surface of the half bearing. The axial groove extends along an entire width of the inner circumferential surface of the half bearing.

Half bearing

A halved sliding bearing is provided, two of which are paired into a cylindrical shape. The halved sliding bearing includes a steel back metal, and a bearing alloy layer, which serves as a sliding surface, on the inside of the steel back metal. A coat layer of Bi or a Bi-based alloy is formed on the outside back surface of the steel back metal. Preferably, the coat layer consists of 1 to 30 mass % of one or more of Sn, Pb, In, Ag and Cu and the balance being Bi and inevitable impurities.

Sliding bearing

A cylindrical sliding bearing having a cylindrical steel back metal, and a bearing alloy layer, serving as a sliding surface, on the inside of the steel back metal is provided. The cylindrical sliding bearing further have a coat layer of Bi or a Bi-based alloy formed on the outer back surface of the steel back metal. Preferably, the coat layer is made from the Bi-based alloy of 1 to 30 mass % of one or more kinds of Sn, Pb, In, Ag and Cu; and the balance being Bi and inevitable impurities.

There is provided a method of working a plain bearing and a working apparatus of the plain bearing, which make it easy to perform working by forming a plurality of inclined surfaces of different angles in portions on both sides of the inner peripheral surface of the bearing alloy metal of the plain bearing in the axial direction thereof. In the working method and apparatus, a working holder is provided which has a groove extending on the inner peripheral surface in the peripheral direction and portions on both sides of the groove in the transverse direction formed in step-like shape, a half bearing is housed in the working holder and both ends of the half bearing in the peripheral direction are pressed by use of pressing means Then, the half bearing undergoes plastic deformation so as to be fitted into the groove and both sides of the half bearing in the axial direction thereof come into abutment with the edges of the step-like portions and are deformed in a polygonal line form. In this state, both ends of the half bearing in the axial direction thereof are cut along one cylindrical surface by use of a broach As a result, two inclined surfaces of different angles are continuously formed in the portions of both sides of the bearing alloy metal of the half bearing in the axial direction thereof.

Growing community of inventors

Inuyama, Japan

Mikio Suzuki