JPS6090995A - Enclosed type compressor - Google Patents

Abstract

PURPOSE:To mount a balancer and an oil separating plate simply by establishing pins of the end section of a rotor. CONSTITUTION:The rotor 3 of the enclosed type compressor is provided with two sets of pins 15 vertically at the upper end thereof while the balancer 4 and the oil separating plate 7 are fixed to the upper end of the rotor 3 by the pins 15 with a predetermined space S. The pin 15 is a caulking pin and formed with a large diametral part 15a for fixing the balancer 4 and a small diametral part 15b for fixing the oil separating plate 7 stepwisely. The oil separating plate 7 is arranged at a position remote upwardly from the balancer 4 in order to cover the upper end of the rotor 3. The balancer 4 and the oil separating plate 7 are mounted to the rotor by a method wherein the balancer 4 and the oil separating plate 7 are engaged with the pin 15 and the pin 15 is deformed by pressing and caulking it from the axial direction thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a hermetic compressor, and particularly to a hermetic compressor in which the mounting structure of a balancer and an oil separation plate to a rotor is improved.

[Technical background of the invention and its problems] Generally, hermetic compressors used in refrigeration cycles, etc.
As shown in FIG. 1, a motor 2 for driving a compressor is provided in a sealed housing 1, and a rotor of this motor 2 is provided.
3 has a balancer 4 to balance the rotation,
It is contained in a large amount in the compressed gas sent from the lower compressor to the lower side through the through hole 5 formed in the rotor 33. An oil+Vt plate 7 is provided to separate the oil and prevent the oil from flowing out from the discharge pipe 6.

However, in a conventional hermetic compressor, the balancer 4 is fixed to the end of the rotor with a pin 11T'', while the oil separation plate 7 is attached to the sleeve 9 fitted into the shaft hole 8 of the rotor 3. A fixed mounting structure was used.As a result, the number of parts increased and the cost increased by 8.
1 was there.

In addition, in a hermetic compressor where the motor 2 is required to be downsized, there is a tendency for many screws 71 to 10 to be inserted into the shift hole 8, so as shown in FIG. In order to avoid interference with the sleeve 9, it is necessary to form small diameter portions 12 at the ends of the shirts 1 to 10, resulting in an unnecessary increase in the number of processing steps.

In the figure, 13 is a stator of the motor 2, and 14 and 15 are snap rings and corrugated washers for fixing the oil separation plate 7 to the sleeve 9.

[Object of the Invention] The present invention has been made in consideration of the above circumstances, and provides a hermetic compressor in which a balancer and an oil separation plate can be easily and reliably attached, the number of parts is small, and costs can be reduced. The purpose is to provide.

[Summary of the Invention 1] In order to achieve the object, the present invention has a bottle erected at the end of the rotor, and a balancer and an oil separation plate are fixed to the end of the rotor with a predetermined gap by the bottle. It is a thing,
Efforts are being made to reduce the number of parts.

[Embodiments of the Invention] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In FIGS. 3 and 4, reference numeral 3 denotes a rotor of a hermetic compressor, and two bins 15 are installed at the upper end of the rotor. and a disk-shaped oil separation plate 7 are fixed with a predetermined gap S between them. The bottle 15 has a caulking pin that can be easily caulked, and as shown in FIG. 15b are formed in a step shape. The balancer 4 is disposed at the end of the rotor 3, and the oil separation plate 7 is disposed one space above the balancer 14 to cover the upper end of the rotor 3.

Holes 17 and 18 are respectively formed in the balancer 4 and the oil separation plate 7 at portions corresponding to the bottles 15, through which the bottles 15 are inserted.

The balancer 4 and oil separation plate 7 are installed on the bin 15.
The balancer 4 and the oil separation plate 7 are fitted together, and the bottle 15 is
This is done by pressing from the axial direction and deforming it by caulking. In this case, a spacer 19 is formed on the pin 15 between the balancer 4 and the oil separation plate 7 to form a predetermined gap S between the balancer 4 and the oil separation plate 7. However, in the example, Suba', 1-19 is Bin 1.
It is constituted by a deformed swollen portion 20 that is integrally molded on the top of the holder 5 at the time of caulking.

In the hermetic compressor having the above structure, the balance 4 and the oil separation plate 7 are placed in the same bin 15 at the end of the rotor 3.
Since it is fixed in place, it is easy to remove (= J k), eliminating the need for sleeves, snap rings, etc., reducing the number of parts, and eliminating the need to process small diameter parts to avoid interference with the sleeve. As a result, the number of machining steps can be reduced, and at the same time, loss can be reduced.Furthermore, since the weight of the rotating body including the rotor 3 is reduced, the need for photographing the rotating body can be reduced.

[Modification of the Invention] FIG. 5 shows a modification in which a ring 21 is used as one spacer. Bin 1 between balancer 4 and oil separation plate 7
Since the predetermined gap S can be formed by fitting the ring 21 onto the bottle 5, only the tip of the bottle 15 needs to be caulked.
Processing becomes easier.

Furthermore, FIG. 6 shows a modification in which a recess 23 for accommodating the tip crimped portion 22 of the bottle 15 is formed at the periphery of the hole 18 of the oil separation plate 7, so that the upper end of the bottle 15 is placed above the oil separation plate 7. It is formed identically to the end face.

This prevents the occurrence of turbulence in the compressed gas passing through the upper surface of the oil separation plate 7, making the flow of the compressed gas smoother, thereby improving the oil separation effect.

Note that the number of bottles 15 is not limited, and the fixing of the balancer 4 and oil separation plate 7 is not limited to caulking.
It may be fixed on the bottle 15 by brazing or the like.

[Effects of the Invention] In summary, the present invention exhibits the following excellent effects.

(1) Since the balancer and oil separation plate are fixed by a pin provided upright at the end of the rotor, the balancer and oil separation plate can be easily and reliably removed.

(2) The number of parts can be reduced by eliminating the need for sleeves, etc., and there is no need to process small diameter parts to avoid interference with the sleeve, reducing machining man-hours and reducing costs. .

(3) Furthermore, by eliminating the need for a sleeve or the like, the weight of the rotating body including the rotor can be reduced, and vibrations of the rotating body can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional hermetic compressor, Fig. 2 is an enlarged sectional view of the same main part, and Fig. 3 is a sectional view of main parts showing an embodiment of the hermetic compressor according to the present invention. , Figure 4 is an exploded perspective view,
FIGS. 5 and 6 are partial sectional views showing different modifications of the present invention. In the figure, 3 is a rotor, 4 is a balancer, 7 is an oil separation plate, 15
is the pin, and 19 is the subarei degree. Representative patent attorney Kensuke Chika (1 other person) No. 1 (2) Figure 4

Claims (4)

[Claims] (1) A hermetic compressor characterized in that a pin is provided upright at the end of the rotor, and a balancer and an oil separation plate are fixed to the end of the rotor with a predetermined gap therebetween by the pin. (2) The hermetic compressor according to claim 1, wherein the pin includes a spacer for maintaining a predetermined gap between the balancer and the oil separation plate. (3) The hermetic compressor according to claim 2, wherein the spacer is a deformed ridge portion integrally molded with the pin. (4) The hermetic compressor according to claim 2, wherein the spacer is a ring fitted onto a pin. [5] The hermetic compressor according to claim 1, wherein the upper end of the pin is formed to be the same as the upper end surface of the oil separation plate.