JPS61147389U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional structural view of a scroll compressor that is an embodiment of the present invention, Fig. 2 is an exploded perspective view of a rotation prevention mechanism thereof, and Fig. 3 is a diagram for explaining the rotation prevention mechanism. Fig. 4 is a sectional view taken along the line A--A in Fig. 1, Fig. 5 is a sectional view of the conventional example, Fig. 6 is an exploded perspective view of the conventional drive mechanism, and Fig. 7 is a cross-sectional view of the eccentric bushing in Fig. 5. 8 is a diagram for explaining the dynamic balance in FIG. 5, and FIG. 9 is an exploded perspective view of the rotation prevention mechanism in FIG. 5. In the figure, 10 is a compressor housing, 11 is a front end plate, 12 is a cup-shaped portion, 14 is a main shaft, 20 is a fixed scroll member, 21 is a movable scroll member, 22 is a rotation prevention mechanism, 224 is a ball element, 30, 143,271,271',2
71″ is a balance weight.

Claims (1)

[Scope of utility model registration request] A fixed scroll member having a first spiral body provided on one surface of a first plate and fixedly disposed within the housing, and a second spiral body provided on one surface of a second plate. a movable scroll member superimposed with the fixed scroll member such that the second spiral body meshes with the first spiral body in an angularly offset manner to form a closed fluid pocket therebetween; a main shaft rotatably supported by the housing; a drive pin provided eccentrically at the inner end of the main shaft and coupled to the movable scroll member for imparting circular orbital motion to the movable scroll member; and a rotation prevention mechanism that prevents rotation of the movable scroll member during circular orbital motion and thrust-supports the movable scroll member, and the fluid pocket increases in volume due to the circular orbital motion of the movable scroll member. In the scroll type compressor, the rotation prevention mechanism moves toward the center of both the spiral bodies while decreasing the amount of fluid, thereby compressing the fluid. a ring-shaped movable scroll side race fixed to the surface opposite to the spiral body; and a ring-shaped movable scroll side race fixed to the surface of the second plate body opposite to the second spiral body so as to cover the movable scroll side race. A movable scroll side ring, a ring-shaped fixed race whose entire surface is bonded and fixed to the inner wall of the housing opposite to the movable scroll side race, and a slight ring between the movable scroll side ring and the movable scroll side ring so as to cover the fixed race. It is made in a ring shape with a fixing ring fixed to the inner wall of the housing so that there is a gap,
Moreover, the movable scroll side ring and the fixed ring each have a plurality of pockets of the same diameter drilled in the axial direction at respective positions in the circumferential direction where they can overlap when the centers of each ring are aligned. A plurality of ball elements are always held between the pocket of the scroll side ring and the pocket of the fixed ring, and the difference between the outer diameter and the inner diameter of the movable scroll side race and the fixed race is the transfer of the ball element. The second plate body of the movable scroll member has a boss formed on a surface opposite to the second spiral body. A bush having an eccentric hole is rotatably supported in the boss, the drive pin is rotatably fitted in the eccentric hole, and the bush is connected to the orbit of the movable scroll member and the bush. The balance weight has a balance weight that offsets the dynamic unbalance caused by the orbital movement, and the balance weight has a balance weight formed between the outer periphery of the boss and the inner periphery of the rotation prevention mechanism due to the circular orbital movement of the movable scroll member. A scroll compressor characterized by being provided with an auxiliary balance weight extending within a generally crescent-shaped space.