Other

Hitachi Home and Life Solutions, Inc.

Tsutomu Nozaki

Yuji Yoshitomi

Hidekazu Tokushima

Toshikazu Takehana

Tadayoshi Yano

Kensuke Kato

Takeo Watanabe

Nobuo Abe

A high-performance hermetic type compressor in which the influence of a cylinder bore deformation caused during assembly is reduced and the sealing tightness between a piston and a cylinder block is improved. A bore hole in the cylinder block has a hollow portion. Depth Hof the hollow portion is larger than thickness Hof compression space V at the moment when the pressure in the compression space V reaches the discharge pressure level Pd.

Hermetic type compressor

A spindle motor having a bearing housing and a thrust bearing fitted in the bearing housing at the lower end of the latter, in which an inclined part is formed on the outer peripheral edge at the lower end of the thrust bearing, and the outer diameter part of the thrust bearing is fitted in a coupling bore formed in the end surface of the bearing housing, the end surface of the bearing housing being pressed uniformly in the axial direction over the entire circumference around the coupling bore to cause the bearing housing to plastically flow around the coupling bore in order to cover the above-mentioned inclined part of the thrust bearing. The above-mentioned covering part formed in the bearing housing through plastic flow can exhibit a high bonding strength between the bearing housing and the thrust bearing in the spindle motor without deteriorating the sealing ability of the spindle motor, due to a shearing force and a residual contact pressure of the covering part.

Spindle motor and manufacture thereof

Growing community of inventors

Kashiwa, Japan

Tsutomu Nozaki