JPH11336685A - Rotary compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent such possibilities that inside noises are leaked out, and at times, a discharge cover itself vibrates, causing the noise, in the case where press fit of the discharge cover is difficult due to the size of fitting between the cover and a bearing, and a clearance is large enough, from occurring. SOLUTION: In this compressor, a discharge cover 11 is stuck and secured to a bearing 5 by a peripheral part and a stepped flat part 14, and a run-off part 15 or notch is installed in the peripheral part of a section where the stepped flat part 14 of the discharge cover 11 is situated. With the run-off part 15 or notch installed, the run-off part 15 or the notch is extended when press fitting can be easily pressed in, whereby assembling work is improved. Since the run-off part 15 or the notch is installed in the peripheral part of a section where the stepped flat part 14 of the discharge cover 11 is situated, inside noises are hard to leak to the outside from the run-off part 15 or notch.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor used for refrigeration and air conditioning.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a rotary compressor of this type has a motor 102 and a compression mechanism 103 in a closed container 101, and the compression mechanism 103 is driven by a drive shaft 104.
The drive shaft 104 is supported by an upper bearing 105 and a lower bearing 106. Refrigerant gas is sucked through a suction hole 107, compressed by a compression mechanism 103, discharged out of a discharge hole 108 of an upper bearing 105 into a closed container 101, and refrigerated through a discharge pipe 109 (not shown).
Spitted inside. A discharge cover 111 is attached to the upper bearing 105 so as to cover the discharge hole 108 for the purpose of reducing noise generated by gas discharge and noise caused by opening and closing the valve 110. When the discharge cover 111 is mounted on the upper bearing 105, the tip of the press-fitting portion is bent outward to facilitate the press-fitting.

[0003]

However, in the above-mentioned conventional configuration, when the inner circumference of the discharge cover 111 is too small than the outer circumference of the upper bearing, the press-fitting force when mounting the discharge cover 111 is too large, and In other words, there is a problem in that deformation or press-fitting is not possible.

When the fitting between the discharge cover 111 and the upper bearing 105 is large, a gap is formed between the inner periphery of the discharge cover and the outer periphery of the upper bearing, so that internal noise leaks to the outside or sometimes the discharge cover 111 itself. Had the problem that it vibrated and caused noise.

The present invention solves such a conventional problem, and provides a discharge cover which improves the adhesion between the discharge cover and the upper bearing, and further improves the assembling property, and further reduces the noise. It is an object of the present invention to provide a type compressor.

[0006]

In order to solve the above-mentioned problems, the present invention provides a compression mechanism, a drive shaft for driving the compression mechanism, a bearing for supporting the drive shaft, and the compression mechanism provided on the bearing. A discharge cover that covers the discharge hole of the discharge cover, the discharge cover is tightly fixed to the bearing by an outer peripheral portion and a step flat portion, and a relief portion is provided on an outer peripheral portion of a portion where the step flat portion of the discharge cover is located. It is a thing.

By providing the escape portion on the outer peripheral portion of the discharge cover, the escape portion is extended at the time of press-fitting, so that the press-fit can be easily performed, and the assembling work is improved. In addition, since the relief portion is provided on the outer peripheral portion of the portion where the stepped flat portion of the discharge cover is located, the outer peripheral portion of the discharge cover and the stepped flat portion maintain the sealing property with the bearing, so that the internal noise can escape. This makes it possible to easily manufacture a rotary compressor that is less likely to leak from the part to the outside and has less noise.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a compression mechanism, a drive shaft for driving the compression mechanism, a bearing for supporting the drive shaft,
The bearing is provided with a discharge cover that covers a discharge hole of the compression mechanism provided in the bearing. The discharge cover is closely fixed to the bearing by an outer peripheral portion and a step flat portion, and a portion where the step flat portion of the discharge cover is located. The outer peripheral portion is provided with a relief portion convex toward the outer periphery.

By providing a relief portion on the outer peripheral portion of the discharge cover corresponding to a portion where the discharge cover is in close contact with the flat portion of the bearing, the relief portion can be easily press-fitted by extending the relief portion at the time of press-fitting, and assemblability is improved. The adhesion of other parts can be improved.

According to the present invention, a notch is provided in the outer peripheral portion of the discharge cover as a relief portion of the discharge cover. By doing so, the notch widens at the time of press-fitting, the press-fitting pressure can be reduced, and the assemblability can be improved.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) In FIG. 1, a closed casing 1 has an electric motor 2 and a compression mechanism 3, and the compression mechanism 3 is driven by a drive shaft 4. The drive shaft 4 is supported by an upper bearing 5 and a lower bearing 6. Refrigerant gas is sucked from the suction hole 7, compressed by the compression mechanism 3, and discharged from the discharge hole 8 of the upper bearing 5 into the closed container,
It is discharged from the discharge pipe 9. A discharge cover 11 is attached to the upper bearing 5 so as to cover the discharge hole 8 for the purpose of reducing noise generated by gas discharge and noise caused by opening and closing of the valve 10. The discharge cover 11 is inserted from above the upper bearing 5, pressed into the upper bearing 5, and fixed with bolts 12.

FIG. 2 is a perspective view of the discharge cover portion. In the drawing, an outer peripheral portion 13 and a step flat portion 14
The outer peripheral portion 13 and the flat step portion 14 are in close contact with the upper bearing 5. An escape portion 15 having an outwardly convex shape is provided on the outer peripheral portion of the portion where the stepped flat portion 14 of the discharge cover is located. By forming a convex shape, the discharge cover
The protrusion is extended at the time of press-fitting without significantly impairing the rigidity of the eleventh embodiment, so that the press-fit pressure can be reduced and the assembling property can be improved. Further, as described above, since the discharge cover 11 is continuously in close contact with the upper bearing 5, the outer peripheral portion 13, and the step flat portion 14, the internal noise does not leak from the escape portion. (Embodiment 2) In FIG.
6 is assumed. Similarly to the above, the notch extends at the time of press-fitting, so that the press-fitting pressure can be reduced and the assembling property can be improved.

[0013]

As is apparent from the above embodiment, the relief portion 15 or the notch 16 is provided in the discharge cover 11, so that when the discharge cover 11 is pressed into the upper bearing 5, the relief portion 12 or the notch 16 is formed. Extend, the discharge cover 11 and the upper bearing 5 can be stably cut, and the assemblability can be improved.
A low-noise rotary compressor can be provided.

In this figure, the rolling piston type rotary compressor has been described, but the present invention can be applied to other rotary compressors. In addition, although the example in which the discharge cover is assembled to the upper bearing is shown, it is apparent that the same effect can be obtained by assembling the discharge cover to the lower bearing.

[Brief description of the drawings]

FIG. 1 is a sectional view of a rotary compressor showing an embodiment of the present invention.

FIG. 2 is a perspective view of a discharge cover showing an embodiment of the present invention.

FIG. 3 is a perspective view of a discharge cover showing another embodiment of the present invention.

FIG. 4 is a sectional view of a rotary compressor showing a conventional example.

[Explanation of symbols]

 Reference Signs List 3 Compression mechanism 4 Drive shaft 5 Upper bearing 8 Discharge hole 11 Discharge cover 13 Outer peripheral part 14 Flat step part 15 Relief part 16 Notch

Claims (2)

[Claims] A discharge shaft for driving the compression mechanism; a bearing for supporting the drive shaft; and a discharge cover for covering a discharge hole of the compression mechanism provided in the bearing. The outer peripheral portion and the flat step portion are tightly fixed to the bearing, and a relief portion convex toward the outer periphery is provided on the outer peripheral portion of the portion where the flat step portion of the discharge cover is located. Type compressor. 2. The rotary compressor according to claim 1, wherein a notch is provided at an outer peripheral portion of the discharge cover as a relief portion.