Mitsubishi Denki Kabushiki Kaisha

Keiji Sakaino

Hiroshi Ogawa

Toshiyuki Nakamura

Takashi Yamamoto

Fumiaki Sano

Norihide Kobayashi

Masahiko Oide

Yoshinori Shirafuji

A scroll type compressor having a main frame, a sub frame and a crankshaft rotatably mounted in the main frame and the sub frame via a main frame bushing and a sub frame bushing, further includes a fixed scroll and an orbiting scroll cooperable with the fixed scroll to compress gas, the orbiting scroll being drivingly mounted on the eccentric shaft portion. A barrel shaped band portion faces the crankshaft and presents a convex surface in at least one of a respective force direction of a compressive load generated in a compression chamber formed between the orbiting scroll and the fixed scroll, and a reactive force direction of a centrifugal load generated by a revolution movement of the orbiting scroll and rotary movements of upper and lower balance weights. The barrel shaped band portion is formed on the sub frame bushing.

Scroll type compressor having a convex surface on the sub frame bushing

A scroll type compressor comprising: a crankshaft having an eccentric shaft portion formed thereon; an orbiting scroll which is given torque by the crankshaft through the eccentric shaft portion; and bearing means for rotatably supporting the crankshaft; wherein at least one of the eccentric shaft portion and the bearing means is constituted by a rotatably engaged bushing and a curved surface portion.

Scroll type compressor having curved bearing surfaces

Scroll type compressor having curved surface portions between the shaft

Growing community of inventors

Shizuoka, Japan

Keiji Sakaino