JPS6170192A - Rotary compressor - Google Patents

Abstract

PURPOSE:To prevent harmful stress from being caused in an elastic member for placing a vane in pressure contact with a rotor, by making the elastic member of a helical torsion spring, and layer the axis of the spring nearly in parallel with the axis of gyration of the rotor. CONSTITUTION:A helical torsion spring 11 is located at one end portion 11a in contact with the back of a vane 8 and at the other end portion 11b with the bottom of the vane sliding groove 4a of a cylinder. The axis of the spring 11 is nearly parallel with that of a rotary shaft 6. The spring 11 acts in conjunction with the sliding of the vane 8. Since the force acting to the end portion 11a of the spring 11 produces twisting moment about the axis of the spring, almost only bending stress in caused in the wire constituting the spring. Furthermore, the end portion 11b of the spring 11 is rotatable on the bottom of the sliding groove 4a. As a result, no harmful stress is caused in the spring.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary compressor suitable for air conditioners, household electric refrigerators, and the like.

1 and 2 are cross-sectional views of a conventionally known rotary compressor (hereinafter referred to as compressor), in which an electric element 2 is placed in a closed container 1.
The compression element is formed by fixing a cylinder 4 and a bearing 7 to the frame 3 with a pin 10, and enclosing a roller 5 inside the cylinder. The vane 8 has a function of partitioning the inside of the cylinder 4 into a high pressure chamber and a low pressure chamber, and its back surface is connected by a spring 9 and pressed against the roller 5. Further, the other end of the spring 9 is locked in a hole 3m provided in the frame. This kind of spring shape has the following drawbacks: That is, in order to be connected to the hole 3a of the frame, the spring 9
Harmful torsional force is generated in the wire in the straight portion of the spring, and this torsional force acts repeatedly in conjunction with the movement of the vane 8, causing a decrease in the fatigue strength of the spring 9. Further, this type of spring is disposed at the bottom of the closed container 1, but since it occupies about half (2) of the area of the bottom 9 gaps, it is necessary to provide it in another part.

In other words, we focused on the fact that a torsional coil spring receives a torsional moment around the axis of the spring, and that bending acts as stress during tightening.One end of the torsion coil spring is brought into contact with the back surface of the vane, and the other end is I will explain. Figure 2 shows the structure of the compressor for first base.
The shape of the compression element is shown in detail, including the frame 3, rotating shaft 6, and shaft-mounting material.One end 11a of the spring is brought into contact with the back surface of the vane, and the other end 11b is brought into contact with the cylinder. The axial center of the spring 11 is substantially parallel to the axial center of the rotating shaft 6. Also, since the surface 4b of this cypress cylinder 4 sandwiching the sliding groove 4s can be partially formed to be lower than the height of the cylinder, the two end portions 11a, llb of the spring 11
are inserted from both sides of the sliding groove 4m. Furthermore, in order to prevent the spring 11 from falling, the base end 11 of the end portion 11b is
c is bent by 90° and locked onto the end 4b of the sliding groove 4m. On the other hand, the movement of the spring 11 is linked to the sliding movement of the vane 8, and the force acting on the end 11m acts as a torsion moment around the axis of the spring 11, so almost only bending stress acts on the wire. . Furthermore, the end fB 1
Since lb is fixed at the rotation mark on the bottom of the sliding groove 41, it has a structure that prevents harmful stress, so the strength of the spring is improved and the conformability of the pressure is improved. Furthermore, since the spring shape is compact, there are fewer restrictions on the shape of the pond parts. Furthermore, spring installation requires the use of special parts or holes in the frame as in the past.

[Brief explanation of drawings]

A vertical cross-sectional view of a rotary compressor, Figure 4 is a horizontal sectional view of Figure 3.
The R-side view, FIG. 5, is a perspective view of section A in FIG. 2. DESCRIPTION OF SYMBOLS 1... Sealed container, 2... Electric element, 3... Frame, 31... Hole, 4... Cylinder, 4m... Sliding groove, 4b... Sliding groove end surface, 5 ...Roller, 6...
・Rotating shaft, 7...bearing, 8...vane, 9...
Spring, lO... Bolt, 11... Torsion coil spring, l1m... Vane side end, 11b... Sliding groove bottom side end, 11c... Bent part.

Claims (1)

[Claims] 1. A rotary compressor in which a vane is configured to be slidable in a sliding groove provided in a cylinder, and the vane is pressed against a roller by an elastic body, wherein the elastic body is formed by a torsion coil spring. and the axis of the spring is arranged so as to be substantially parallel to the rotation axis, and one end of the spring is brought into contact with the back surface of the vane, and the other end is brought into contact with the bottom surface of the vane sliding groove of the cylinder. A rotary compressor characterized by: 2. The rotary type compression according to claim 1, wherein both ends of the torsion coil spring are inserted into the bottom surface of the vane sliding groove and the back surface of the vane from both sides of the cylinder that sandwich the vane sliding groove. Machine. 3. The tip of the end of the torsion coil spring that comes into contact with the bottom surface of the vane sliding groove is bent at 90 degrees, and the bent portion is locked to the side surface of the end of the bottom surface of the vane sliding groove, and the bottom surface of the sliding groove is 2. The rotary compressor according to claim 1, wherein the rotary compressor is configured to be rotatable.