JPS60201095A - Enclosed rotary type compressor - Google Patents

Abstract

PURPOSE:To prevent change of characteristics of the compressor, which is due to the strain of welding, by a method wherein a compression mechanism is retained to the inner periphery of a holder plate made of iron plate while an L-shaped outer periphery thereof is secured to an enclosed case by welding. CONSTITUTION:The holder plate 8 of iron plate, formed by press forming, is secured by force fitting to the outer periphery 4a of the thick and strong bearing section of the bearing plate 4 of a compression mechanism. The holder plate 8 is provided with a circumferential rib 8a, whose outer periphery is formed into L-shape, and the outer peripheral section 8b is abutted against the inner surface of the enclosed case 1 to weld it thereto by spot welding or the like at the outer periphery 9 thereof. As a result, generation of strain in the compressor, which is due to heat upon welding, may be mitigated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hermetic rotary compressor used in refrigerant devices such as refrigerators and air conditioners, and relates to a technique for joining a compression mechanism within a hermetic case.

Structure of a conventional example and its problems A sectional view of a rotary compressor, which is one type of conventional hermetic rotary compressor (hereinafter referred to as a compressor), is shown in FIG. 1 and will be described. A is a sealed case in which an electric motor b and a compression mechanism C are built. The outer periphery of the electric motor b is shrink-fitted and fixed to the sealed case. The bearing grade dK of the compression mechanism C is the cylinder e2 rotating piston f.

An end plate q is screwed onto the end plate q, and its outer periphery is in close contact with a welding hole in the sealed case a, and is welded by welding i.

With the above configuration, thermal strain when welding i is performed causes distortion in the bearing plate 1-d, causing deviation in the gap j between the rotating piston f and the bearing plate 1-d, etc.
This has the disadvantage that the input power of the compressor becomes large and the performance is poor, that is, the characteristics of the compressor become unstable. Furthermore, since the material of the bearing plate 1-d is cast metal, welding is difficult and gas leaks easily from the welding holes.

OBJECTS OF THE INVENTION In order to solve the above-mentioned drawbacks, it is an object of the present invention to eliminate unstable characteristics of a compressor caused by distortion and to eliminate gas leakage from welding holes.

Structure of the Invention In order to achieve this object, the present invention uses a holder plate made of iron plate that connects the compression mechanism and the closed case. The compression mechanism is locked at a strong portion by the iron holder plate. Furthermore, the iron plate holder plate has an L-shaped contact surface with the sealed case, and when this part is spot welded to the sealed case, there is no need to drill holes for welding in the sealed case. be.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. Second
In the figure, an electric motor 2 and a compression mechanism 3 are built into a sealed case 1. The outer periphery of the electric motor 2 is fixed to the sealed case 1 by shrink fitting. A cylinder 6, a rotary piston 6, end plays 1 and 7, etc. are screwed onto a bearing plate 4 of the compression mechanism 3. A holder plate 8 made of, for example, an iron plate is press-fitted into the thick and strong bearing outer layer 4a of the bearing plate 4 and is formed by a press or the like.

The holder plate 8 has a circumferential lip 8a, the outer periphery is formed into an L-shape, and the outer periphery 8b is brought into contact with the inner surface of the sealed case 1 and welded by spot welding 9 or the like.

FIG. 3 shows a spherical rotary compressor according to another embodiment, in which an electric motor 2 and a compression mechanism 13 are built in a sealed case 1. The outer periphery of the electric motor 2 is fixed to the sealed case 1 by shrink fitting. A spherical rotating mechanism 15 is housed in the casing 14 of the compression mechanism 13 and is screwed onto the casing 14 of the compression mechanism 13. The thick and strong bearing of the casing 14 has a portion 14a.
A holder plate 8 made of, for example, an iron plate, formed by a press or the like, is press-fitted into the IC. The holder plate 8 has a circumferential lip 8a, the outer periphery is formed into an L-shape, and the outer periphery 8b is brought into contact with the sealed case 1 and welded by spot welding 9 or the like.

In the above configuration, the connection between the compression mechanism and the sealed case 1 is as follows:
A holder plate 8 made of a molded iron plate is used, and a strong part of the compression mechanism is locked therein, and the holder plate 8 is provided with a circumferential lip 8a for strain absorption. The contact surface of the holder plate 8 with the sealed case 1 is spot welded 9, and no hole is drilled in this part of the sealed case 1.

The performance characteristics of the compressor are stable because the accuracy of the gaps, etc. of the following compression mechanism does not go out of order. Additionally, there are no holes for welding, so no gas leaks occur. The above effects can be obtained.

As is clear from the explanation in Section 2 of ``Effects of the Invention'', in the present invention, communication between the compression mechanism and the sealed case is made by a holder plate made of iron plate, and the L-shaped outer periphery of this holder plate is connected to the sealed case. Since it is fixed by spot welding, it has the following effects.

[1] Since the accuracy of the compression mechanism will not be lost due to thermal distortion during welding, the performance characteristics of the compressor will maintain a predetermined value and be stable with little variation.

[2] The compression mechanism and the contact case are connected by a holder plate made of iron plate, and the holder plate and the holder plate are tightly sealed.1. Since there are no holes for welding in the bolt case, there is no gas leakage from the welded part.

The above effects can be obtained.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional rotary compressor, Fig. 2 is a sectional view of a hermetic rotary compressor showing an embodiment of the present invention, and Fig. 3 is a sectional view of a hermetic rotary compressor showing another embodiment of the invention. It is a sectional view of a compressor. 1°... sealed case, 3... compressor, 8. holder plate, 8b... outer periphery of holder plate.

Claims (1)

[Claims] It consists of an airtight case, a compression mechanism built into the airtight case, and a holder plate made of iron plate that connects the airtight case and the compression mechanism. A hermetically sealed rotary compressor in which an outer circumferential portion formed in the casing is fixed to the hermetically sealed case by welding.