JPS6027836Y2 - compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compressor with an improved frame structure for mounting a compression section.

Generally, in the case of a rotary type compressor, the frame or the stator of the motor are sequentially press-fitted into the case and fixed, and the cylinders that make up the compression section are hermetically fixed to the frame. ing.

However, in the past, the frame was formed into a flat plate shape and was fixed by press-contacting the peripheral side to the inner wall surface of the case, so the press-fitting stress received by the peripheral side of the frame as a reaction during press-fitting is directly applied to the frame. It was transmitted to the cylinder mounting part.

For this reason, the flatness of the frame is likely to be distorted, causing distortion in the inner curved surface dimensions of the cylinder, the parallelism of the blade grooves, etc., reducing the accuracy of the compression part, and also causing a problem in the relationship between the bearing part of the frame and the rotor axis of the motor. There were drawbacks such as difficulty in alignment.

The present invention was developed in view of the above circumstances, and its purpose is to provide a pressure welding part that is press-fitted into the case, a base to which the compression part is attached, and a connecting part that connects the pressure welding part and the base. By forming the connecting part of the frame consisting of It is an object of the present invention to provide a compressor in which a portion can be absorbed by a connecting part.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

Reference numeral 1 in FIG. 1 is a compressor case, and a frame 2 is press-fitted into the center of the case 1 and fixed thereto.

A bearing part 3 that projects upward is integrally provided at the center of the base part 2a of the frame 2, and a rotating shaft 4 is rotatably supported on this bearing part 3.

Further, a motor rotor 5 is integrally provided on the upper side of the rotating shaft 4, and the motor rotor 5 is surrounded by a motor stator 6 with an appropriate gap.

Further, a cylinder 7 is airtightly fixed to the lower surface side of the base 2a of the frame 2, and an eccentric portion 4a of the rotating shaft 4 is located inside the cylinder 7. A roller 8 is attached to 4a.

A blade 10 is attached to the cylinder 7 and is constantly urged against the roller 8 by a spring 9. This blade 10 advances and retreats into the cylinder 7 as the roller 8 rotates, forming a compression chamber. It looks like this.

Furthermore, a sub-bearing 1 is provided on the lower end surface of the cylinder 7.
1 is attached, and this sub-bearing 11 is attached to the base 2 of the frame 2 together with the cylinder 7 by a bolt 12.
It is fixed at a.

Note that 13 is a lubricating oil 2 housed in the inner bottom of the case 1.

In the above configuration, when the motor rotor 5 is operated to rotate the rotating shaft 4, the roller 8 in the cylinder 7 is rotated, and when the compressor constitutes a refrigeration cycle, the refrigerant evaporated in the evaporator is Gas is drawn into the cylinder 7, compressed, and then discharged to a condenser.

On the other hand, to explain the frame 2 in detail, as shown in FIG. 2, this frame 2 includes a base 2a from which a bearing 3 is protruded, and a connecting part 2b having a wall thickness smaller than that of the base 2a. The pressure contact portion 2c is integrally connected with the pressure contact portion 2c via the pressure contact portion 2c.

The connecting portion 2b is inclined upward toward the inner wall of the case 1, and a step H is formed between the pressure contact portion 2C and the base portion 2a.

When this frame 2 is press-fitted into the compressor case 1, the pressure contact portion 2C is pressed against the inner wall surface of the case 1 and fixed.

When the frame 2 is press-fitted, a press-fitting stress in the normal direction as shown by the arrow is applied to the press-fitting part 2c of the frame 2, which presses against the inner wall surface of the case 1, based on the reaction at the time of press-fitting, and this press-fitting stress is It attempts to act on the base portion 2a via the portion 2b.

However, the connecting portion 2b is formed to have a smaller wall thickness than the base portion 2a, and is also inclined as described above, and a step H is formed between the pressure contact portion 2C and the base portion 2a, so that the pressure contact portion 2C is When subjected to press-fitting stress, the connecting portion 2b easily elastically deforms, and most of the press-fitting stress is absorbed into the connecting portion 2b.

Therefore, the press-fitting stress acting on the press-fitting portion 2C of the frame 2 does not directly act on the base 2a, and is significantly reduced, thereby preventing deformation of the base 2a due to the press-fitting stress.

In the above embodiment, a step H is formed between the pressure contact part 2C and the base part 2a by inclining the connecting part 2b, but the present invention is not limited to this, and as shown in FIG. A step H may be provided by forming a step 14 in the middle of the connecting portion 2b.

Further, as shown in FIG. 4, the step H may be formed using an inclined rib 15 as a connecting portion.

As explained above, the present invention provides a connection part of a frame that is made up of a press-fitting part that is press-fitted into the case, a base part to which the compression part is attached, and a connecting part that connects the press-fitting part and the base part, which is thicker than the base part. Since the frame is formed to be small and there is a step between the base and the press-fitting part, most of the press-fitting stress that the press-fitting part of the frame receives when the frame is press-fitted into the case is transferred to the base and the press-fitting part. It is possible to provide a frame that can be absorbed by the connecting portion and can prevent deformation of the base due to press-fit stress.

Therefore, there is no distortion in the inner curved surface dimensions of the cylinder attached to the base of the frame or the parallelism of the blade grooves, and the accuracy of the compression part can be maintained. This has practical effects such as facilitating mental alignment.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the present invention.
FIG. 1 is a longitudinal sectional side view showing the compression part, FIG. 2 is a longitudinal sectional view showing the main part, and FIG. 3 is a longitudinal sectional view showing another embodiment of the main part.
FIG. 4 is a longitudinal sectional view showing still another embodiment of the main part. 1...Case, 2...Frame, 2a
...Base, 2b...Connection part, 2c...
...pressure welding part.

Claims (1)

[Scope of utility model registration request] In a compressor equipped with a frame consisting of a pressure welding part that is press-fitted into a case, a base part to which a compression part is attached, and a connecting part that connects the pressure welding part and the base, the connecting part of the frame has a wall thickness smaller than that of the base part. What is claimed is: 1. A compressor characterized by having a step between a base portion and a pressure welding portion.