JPS6310314B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a hermetic compressor, and particularly relates to an improvement of a frame for mounting an electric motor section and a compressor section.

[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 iron, aluminum casting, and aluminum die-casting.The stator, which constitutes the motor part, is attached to one side of the frame, and the compressor part is attached to the other side. I am trying to install the cylinders that make up the. However, frames made of cast metal or die-cast aluminum require a lot of post-processing.
It has the disadvantage of being expensive, and recently sheet metal frames using inexpensive plate materials have been proposed.

Incidentally, the frame of a hermetic compressor is required to have rigidity, as it not only mounts the compressor and electric motor parts, but also serves to restrict vertical movement within the hermetic case. There is a problem in that the flat plate shape of the plate material itself is inferior in rigidity.

Therefore, in the above-mentioned sheet metal frame, in order to increase the rigidity, the plate material is subjected to a lot of plastic processing such as squeezing, and at the same time, the stopper part that restricts vertical movement and the mounting part are constructed by joining separate parts.
The electric motor, compressor, and stopper sections are reinforced at the same time as they are installed.

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

Therefore, at the same time as the end of the plate is bent, a pair of separated stator mounting pieces are formed at the end so that the stator can be supported by the stator mounting pieces, and the cylinder can be supported by the plate-shaped outer surface. In addition, it has been proposed to attach a stopper part as a separate part to the plate material, thereby minimizing processing and joining of parts.

However, this has the problem of not being able to provide sufficient rigidity for the stator mounting piece, which is particularly subjected to force, and the trouble of joining the stopper part cannot be solved. There is a demand for a simple frame.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and its purpose is to provide a sealed type with a frame equipped with a stopper portion that has high rigidity for supporting the stator without increasing the basic external size, and has a simple structure. Our goal is to provide compressors.

[Summary of the invention]

In this invention, the frame is formed by bending and forming the ends of a plate material and punching out the center of the end into a U-shape. By integrally forming the protruding stopper part and the stator mounting piece part, which is connected to both sides of the stopper part, the basic external size does not increase when the plate material is bent, and becomes integrated with the plate material. The structure of the stopper part is simplified by the stopper part, and the rigidity of stator support is increased by the stator mounting piece part that connects the stator parts.

[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 compressor case, 2 is a reciprocating compressor section consisting of a cylinder 2a and a piston 2c connected to a connecting section 2b, and 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, a pair of vertical direction regulating mechanisms 5 are provided, which are formed by an upper restricting member 5a and a lower restricting member 5b arranged apart from each other.

The structure of the frame 3 of this hermetic compressor is shown in FIG. To explain this frame 3, it is a substantially rectangular plate 6 made of steel.
For example, U-shaped slits 7, 7 are provided in advance on both end sides of the plate material 6, and the ends of the plate material 6 are bent into an L shape using a press machine, etc., and the plate material 6 is surrounded by each slit 7, 7. U-shaped portion 8, 8
The cylinder mounting surface portion 6a is formed on the outer surface of the plate material 6, and the U-shaped portions 8, 8 are located at the center of the end of the plate material 6 and protrude laterally flush with the plate surface portion.
The stopper portions 9, 9 are integrally formed at the plane portion. Therefore, the stopper parts 9, 9 have a simple structure that does not require any complicated joining. Furthermore, L-shaped portions located on both sides of the stopper portions 9, 9 that are connected to each other form stator support pieces 10, 10, respectively, and the stator support pieces 10, 10 are connected to each other. The rigidity of stator support at the connecting portion 10a is dramatically increased.

The frame 3 has such increased rigidity and the structure of the stopper parts 9, 9 is simplified.
The cylinder 2a is bolted onto the cylinder mounting surface 6a of the frame 3 through fixing holes 11, 11 drilled in the frame 3, and the stator support pieces 6a are mounted on the stator support pieces 10, 10 of the cylinder 2a. Fixing holes 12,1 drilled in parts 10,10
2 through which the stator 4b is similarly attached by bolting. Also, in the center of the plate surface of the frame 3, there is a through hole 14 for attaching the main bearing 13.
A main bearing 13 is installed in the through hole 14.
Connecting part 2 which constitutes compressor part 2 through
b and a rotor 4a constituting the electric motor section 4 are connected via a shaft 15. The frame 3 to which the electric motor section 4 and the compressor section 2 are attached in this manner has its stopper sections 9, 9 on both sides disposed between the upper and lower limiting members 5a and 5b, and is in this state. The frame 3 is floatingly supported via the stator 4b by a support mechanism 16 installed at the inner bottom of the sealed case 1, and the frame 3 is This prevents careless movement in the vertical direction.

Thus, by forming the stopper parts 9, 9 and forming the stator support piece parts 10, 10 connected to each other by bending the ends of the plate material 6 and punching them into a U-shape as described above, The stopper parts 9, 9 may be simple in terms of structure and manufacture, and since the stator support pieces 10, 10, to which particular force is applied, are connected to each other via the connecting part 10a, the rigidity related to stator support is reduced. It is extremely expensive and structurally simple. Moreover, since the ends of the plate material 6 are bent, the basic external shape of the frame 6 does not become large, and since the entire frame 3 is formed by the bending process, the production cost is extremely low. be.

In addition, in the above-mentioned embodiment, the stator support piece was bent outward to form the stator support piece, but the stator support piece may be bent inward to form the stator support piece. They may be provided on all sides. Further, in the above-described 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.

[Effects of the Invention] As explained above, according to the present invention, the frame including the stopper portion and the stator support piece portions connected to each other is integrally constructed by bending a plate material and punching it into a U-shape. In addition, the structure of the stopper part can be made extremely simple, and sufficient rigidity can be obtained in the stator support piece part 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 the drawing]

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. 1... Sealed case, 2... Compressor section, 2a...
Cylinder, 3... Frame, 4... Electric motor section, 4
b...Stator, 6a...Cylinder mounting surface part, 9
...Stopper part, 10...Stator support piece part.

Claims (1)

[Claims] 1. A stator constituting the electric motor section is attached to one side surface, a frame is provided to attach the cylinder constituting the compressor section to the other side surface, a stopper section is provided at the end of this frame, and the stopper section is used to seal the In a hermetic compressor that restricts the vertical movement of the frame within the case, 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 portion is formed on the outer surface of the plate material, a stopper portion protruding laterally at the center of the end of the plate material, and stator mounting piece portions connected to each other on both sides of the stopper portion are integrally formed. A hermetic compressor characterized by: