JPS59180084A - Enclosed type compressor - Google Patents

Abstract

PURPOSE:To simplify the structure of a stopper part and improve the rigidity of a support piece part by a method wherein a frame, provided with the stopper part and the stator support piece part, connected mutually, is formed integrally by the bending and the extrusion forming of a U-shape of a plate material. CONSTITUTION:The stopper parts 9, 9 and the stator support piece parts 10, 10, which are connected mutually, are formed by the bending forming and the extrusion forming of the U-shape of the end parts of the plate material 6. The stopper parts 9, 9 are simple in the structure and the manufacture thereof while respective support pieces 10, 10, to which forces are applied especially, have very high rigidity when the stator is supported by them since they are connected mutually through connecting parts 10a. Further, the structure may be simplified. Furthermore, the ends of the plate material 6 are bent and the whole body of the frame 6 may be formed by the bending forming, therefore, the basic overall size of the frame 6 is not enlarged and the manufacturing cost therefor may be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in the cover of a hermetic compressor, particularly to a frame to which a motor section and a compressor section are attached.

[Technical background of the invention and its problems]

It is known that a hermetic compressor is constructed by attaching an electric motor section and a compressor section to a frame disposed within a hermetic case. Conventionally, the frame of a hermetic compressor is made of cast iron, aluminum, or die-cast aluminum.The stator, which constitutes the electric motor, is attached to one side of the frame, and the compressor is attached to the other side. I am trying to attach the cylinders that make up the structure. However, such frames made of cast metal or die-cast aluminum require a lot of post-processing and have the disadvantage of being expensive.Recently, sheet metal frames using cheaper plate materials have been proposed. has been done.

By the way, the frame of a hermetic compressor is a frame that not only mounts the compressor section and electric motor section, but also serves to restrict vertical movement within the sealed case, so rigidity is strongly required. However, there is a problem in that the flat plate shape of the plate material itself is inferior in rigidity.

Therefore, in order to increase the rigidity of the above-mentioned sheet metal frame,
At the same time, we applied a lot of plastic processing such as squeezing the plate materials, and at the same time constructed the stock horns and parts that regulate vertical movement, and the mounting parts by joining separate parts to create a new structure for each electric motor, compressor, and stock parts. and reinforcement at the same time as installation ψ.

However, in the structure of a frame to which other parts are joined, which undergoes a large number of plastic workings, the basic outline of the frame becomes thick, which is disadvantageous in that it is not suitable for practical use.

Therefore, at the same time as bending the end of the plate material, a pair of separated stator mounting pieces was formed at the end, and the stator was supported by the stator mounting pieces, while the cylinder was supported by the plate-shaped outer surface. In addition, it has been proposed to attach part of the stopper as a separate part to the plate material, thereby minimizing machining and joining of parts. There is a need for a frame that has sufficient rigidity and has a simple structure for the stopper part, which can solve the problems of not being able to connect the stopper part and the troublesome joining of the stopper part.

[Purpose of the invention]

This invention was made in view of the above-mentioned circumstances, and its purpose is to provide a frame equipped with a portion of the strami 4, which has high rigidity for supporting the stator, and has a simple structure, without increasing the basic external size. The purpose of the present invention is to provide a hermetic compressor.

[Summary of the invention]

In this invention, the frame is formed by bending the ends of a plate material and punching out the center of the end into a U-shape.
, a cylinder mounting surface part is integrally formed on the outer surface of the plate material, a part of the stopper that protrudes laterally at the center of the end of the plate material, and a stator mounting piece part that is connected to each other on both sides of the stopper and part of the part are integrally formed. By bending the plate material, the basic external shape is not increased in size, and the structure is integrated with the plate material. This is intended to increase the rigidity of supporting the stator with the stator mounting pieces that are bent.

[Embodiments of the invention]

The present invention will be described below based on an embodiment shown in the drawings. In FIG. 1, 1 is a hermetic case of a hermetic compressor, 2 is a reciprocating type compressor section consisting of a cylinder 2a and a piston 2a connected to a connecting part RbK, 3 is a frame which is the main part of the present invention, 4 is an electric motor section composed of a rotor 4a and a stator 4b. Further, on the inner circumferential surface of the upper stage side of the sealed case 1, there is a vertical direction regulating mechanism 5 formed by separately arranging an upper limiting member 51L and a lower limiting member 5b.
A pair is provided.

The structure of the frame 3 of this hermetic compressor is shown in FIG. To explain this frame 3,
For example, U-shaped slits 7.7 are provided in advance on both ends of a substantially rectangular steel plate 6, and the ends of the plate 65- are bent into an L-shape using a press machine or the like. , which is constructed by extracting U-shaped parts 8, 8 surrounded by each slit 7.7, and has a cylinder mounting surface 6a on the outer surface of the plate 6, and a cylinder mounting surface 6a at the center of the end of the plate 6, flush with the plate surface.
Stopper portions 9, 9 are integrally formed with the planar portions of the U-shaped portions 8, 8 that protrude laterally. Therefore, Stotsuno J? The parts 9, 9 have a simple structure that does not require any troublesome joining. ′! ! , stopper part 9,9
At the L-shaped part where the two sides are connected,
each forming a stator support piece portion 10°10,
Each stator support piece 10.10 has a connecting portion 10m that connects each other, and the rigidity of the stator support is dramatically increased.

A fixing hole 11 is formed in the frame 3 on the cylinder mounting surface 6a of the frame 3, which has increased rigidity and has a simplified structure of the stopper parts 9, 9.
．． The cylinder 2a is attached by delt tightening through the fixing hole 12.1 in each stator support piece 10.10.
2 through which the stator 4b is similarly attached by delt tightening. Further, a through hole 14 for attaching a main bearing 13 is provided in the center of the plate surface of the frame 3, and the connecting portion 2b constituting the compressor section 2 is connected to the motor section 4 through the main bearing 13 attached to the through hole 14. The rotor 4a constituting the rotor 4a is connected via a shaft 15. And, as shown in the figure, the frame 3 to which the electric motor part 4 and the compressor part 2 are attached is located on both sides of the frame A? The portions 9, 9 are arranged between each of the upper limiting member 5a and the lower limiting member 5b,
In this state, it is floatingly supported via the stator 4b by a support mechanism 16 installed at the inner bottom of the sealed case 1.
Inadvertent movement of the frame 3 in the vertical direction is restricted by interference between each stop/'P portion 9, 9 and each upper restriction member 5 & and lower restriction member 5b.

Thus, as described above, by bending the ends of the plate material 6 and punching them into a U-shape, the stopper portions 9,
9 and the stator support piece portion 1 connected to each other.
0.10, the stator A parts 9, 9 are simple in terms of structure and manufacture, and in particular, the stator support pieces 10, 10, to which force is applied, are mutually connected via the connecting part 10a. Since the stator is connected, the rigidity involved in supporting the stator is extremely high, and the structure is simple. Moreover, since the ends of the plate material 6 are bent, the basic external shape of the frame 6 does not increase in size, and since the entire frame (l) is formed by bending, the production cost is extremely low. .

In the above-mentioned embodiment, the stator support piece is bent outward, but the stator support piece may be bent inward, and the stator support piece is bent inward. may be provided on all sides. Further, in the above-mentioned embodiment, the frame is constructed from a plate material using slits, but it goes without saying that the frame may be constructed without using slits.

〔Effect of the invention〕

As explained above, according to the present invention, the frame is integrally formed by bending the plate material and punching it into a U-shape to form the stator support piece, which is connected to the stator support piece. The structure of the stator support piece can be made extremely simple, and sufficient rigidity can be obtained in the stator support piece with a simple structure. Moreover, since the frame is constructed by bending plate materials, the basic external size is not large, and since only the bending process is required, the manufacturing cost is low.

[Brief explanation of drawings]

The drawings show an embodiment of the invention, with FIG. 1 being a cross-sectional view of a hermetic compressor, and FIG. 2 being a perspective view of a frame. DESCRIPTION OF SYMBOLS 1... Airtight case, 2... Compressor part, 21... Cylinder, 3... Frame, 4... Electric motor part, 4b.
...S9-tenitor, 6h...Cylinder mounting surface part, 9...Part of stator horn 4, 10...Stator support piece part. Applicant's agent Patent attorney Takehiko Suzue 10-

Claims (1)

[Claims] Attach the stator that constitutes the electric motor to one side,
A frame is provided on the other side surface to which the cylinder constituting the compressor section is attached, and a stopper is provided at the end of this frame, and this stopper partially restricts the vertical movement of the frame within the sealed case. In the hermetic compressor, the frame is formed by bending the ends of a plate material and punching out the center of the end into a U-shape. A closed type compression device characterized in that a part of the stopper protruding laterally at the center of the end of the compressor is integrally formed with stator mounting pieces which are connected to each other on both sides of the part of the stopper. Machine.