| 摘要 |
In a scroll type fluid displacement apparatus in which a drive pin (151) is connected between a large-diameter portion (15) of a main shaft (13) and a bushing (33) rotatably held to a movable scroll (26) and which a rotation of the main shaft is transmitted to the bushing through the drive pin to make the movable scroll have an orbital motion around a predetermined axis, a balance weight (331) attached to the bushing has a positioning projection (331c) which is engaged with the large-diameter portion in a rotation direction of the bushing. Therefore, the movable scroll is positioned relative to the main shaft. In addition, the movable scroll defines fluid pockets in cooperation with a fixed scroll (25) therebetween. When the orbital motion of the movable scroll is caused in dependence on rotation of the main shaft with inhibiting rotation of the movable scroll around the predetermined axis, the fluid pockets are displaced between the movable and the fixed scrolls. <IMAGE> |
