JPS6219598B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rolling piston rotary type used in air conditioners or refrigeration equipment, as well as hydraulic and pneumatic equipment.

Conventional structure and its problems In a conventional rolling piston rotary compressor, the wire locking structure that urges the partition plate to move in and out is as follows:
As shown in FIG. 4, a semicircular leg a is formed at one end of an elastic wire A having a circular cross section, and the cylinder piece is fitted with a fixing means such as fitting or adhesive so as to be in contact with the inner diameter of the leg a. A groove b with a flat bottom was provided around the entire circumference of the cylinder c fixed to the cylinder c, and the leg part a was locked in the groove b. However, in such a structure, as the partition plate reciprocates, the force of the elastic wire A is forcibly applied to the semicircular portion of the locked leg a, and the groove b of the cylinder c and the elastic wire A are There was line contact. Therefore, elastic wire A
The problem is that the elastic wire A wears out extremely quickly because the leg a slides but the cylinder C is fixed, and the groove b wears out locally due to line contact, causing the elastic wire A or the cylinder C to wear out very quickly. It had the problem of breaking.

Furthermore, as the wear increases, the gap between the groove b of the cylinder c that locks the leg a of the elastic wire A becomes larger, and the leg a of the elastic wire A does not come into close contact with the groove b and the leg a. had the disadvantage of generating noise when they come into contact with each other.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems and prevents local wear of the elastic wire and cylinder due to line contact between the elastic wire and the groove.

Structure of the Invention In order to achieve this object, the present invention forms the bottom surface of the groove formed around the entire circumference of a freely rotatable cylinder in a circular shape along the outer periphery of the elastic wire, so that the elastic wire and the groove are in surface contact with each other. The cylinder is also designed to rotate.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
This will be explained with reference to FIG.

In the figure, 1 is a sealed container, 2 is a motor stator fixed to the sealed container 1, 3 is a rotor, 4 is a crankshaft fixed to the rotor 3, and 5 is a crankshaft 4
6 is a cylinder piece. A partition plate groove 8 into which the partition plate 7 is inserted and slid is provided in a part of the outer periphery of the cylinder piece 6 in a penetrating state. Reference numeral 9 denotes an elastic wire rod having a circular cross section for pressing the partition plate 7 toward the roller 5 from the outside of the cylinder piece 6, and extends semicircularly around the outer periphery of the cylinder piece 6. One end of the elastic wire 9 fits into a hole in the partition plate 7, and a semicircular leg portion 10 extending toward the partition plate 7 is formed at the other end. Reference numeral 11 denotes a through hole formed in the cylinder piece 6, and is formed at a position 180 degrees from the partition plate groove 8. Reference numeral 12 denotes a cylinder inserted into the through hole 11, one end of which is prevented from coming out, and an engagement groove 13 is formed around the entire circumference at the end on the side where the elastic wire 9 is routed. The engaging groove 13 has a semicircular inner surface including a bottom surface so as to be in surface contact with the elastic wire 9. Here, the leg portion 10 of the elastic wire 9 is connected to the engagement groove 1.
3. Note that 14 is an upper bearing, and 15 is a lower bearing.

In the above configuration, as the crankshaft 4 rotates, the partition plate 7 moves in and out of the partition plate groove 8 due to the biasing force of the elastic wire 9, thereby performing a predetermined compression operation. The leg portion 10 of the elastic wire 9 is fitted into the engaging groove 13 chamfered with a hyperboloid that is in contact with the wire diameter of the elastic wire 9 and is in surface contact, so that the wear resistance of the cylinder 12 and the elastic wire 9 is improved. do. Also, since the cylinder 12 can rotate within the bore of the cylinder piece 6, localized wear is eliminated. Further, even if the leg portions 10 of the elastic wire 9 and the engagement grooves 13 are worn, the elastic wire 9 continues to be in surface contact with each other, so that there is no wobbling.

Effects of the Invention As is clear from the above embodiments, the rolling piston rotary compressor of the present invention engages an elastic wire in surface contact with an engagement groove having a circular bottom surface formed in a rotatable cylinder. Therefore, the abrasion resistance of the elastic wire improves, making it possible to extend the life of refrigeration and air conditioning equipment using this rotary compressor, and making the contact between the elastic wire and the engagement groove smoother. Therefore, there is no noise caused by friction, and quiet compression operation can be obtained, which has many effects.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a rolling piston rotary compressor according to an embodiment of the present invention, Fig. 2 is a plan sectional view taken along the - line in Fig. 1, and Figs. 3 a and b.
4 is a plan view of the main part and a side view of the main part showing the fitted state of the cylinder and the leg in the same compressor, respectively, and FIG. 4 is a plane view of the main part showing the fitted state of the cylinder and the leg of a conventional compressor. FIG. 2 is a diagram and a side view of main parts. DESCRIPTION OF SYMBOLS 1... Airtight container, 2... Stator, 3... Rotor, 4... Crankshaft, 5... Roller, 6... Cylinder piece, 7... Partition plate, 8... Partition plate groove, 9 ……
Elastic wire rod, 10... Leg portion, 11... Through hole, 12
...Cylinder, 13...Engagement groove.

Claims (1)

[Claims] 1. An electric motor and a compression mechanism part driven by the electric motor are arranged in a sealed container, and the compressor part is provided in a crankshaft, a roller, a cylinder piece having a cylindrical cylinder, and the cylinder piece. A rotary compression mechanism is provided with a partition plate that moves by fitting into a groove, and an elastic wire with a circular cross section is provided outside the partition plate to press the partition plate toward the roller. One end is locked to the outside of the partition plate, the other end is bent semicircularly toward the partition plate through the outside of the cylinder piece, and the crank is attached to the cylinder piece at a position opposite to the partition plate. A through hole extending parallel to the axis is formed, a cylinder with one end secured to be rotatably inserted into the through hole, and a curved surface whose bottom surface has the same shape as the elastic wire rod is provided around the entire circumference of the other end of the cylinder. A rolling piston type rotary compressor, in which a rounded engagement groove is provided, and the other end of the elastic wire is engaged with the engagement groove.