JPH0514585U - Hermetic compressor - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to eliminate the need to cover the crimped portion with a disk cover, to eliminate the need for a disk cover, to easily design and process the shape to improve the oil separation effect, and to reduce the size and weight. [Structure] Upper end ring 11 of rotor 7 of electric motor 4
In the hermetic compressor in which the balancer 13 and the oil separating disk 14 are attached to the protruding shaft 12 by caulking, at least one of the upper end ring 11, the balancer 13 and the disk 14 is provided with a positioning notch 19, and the disk 14 In addition, a concave portion 21 for accommodating the crimped portion 15 of the protruding shaft 14 flush with the upper surface of the disk 14 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hermetic compressor with an improved rotor top structure of an electric motor.

[0002]

[Prior Art]

 As shown in Fig. 4, a hermetic compressor often used in an air conditioner has a vertical hermetic container 2 containing lubricating oil 1 at the bottom, a compressor 3 at the bottom, and a compressor 3 at the top. An electric motor 4 for driving the motor 3 is provided. The compressor 3 is fixed to a bearing 6 that rotatably supports the crankshaft 5, and the electric motor 4 is housed in the hermetically sealed container 2 while surrounding the rotor 7 fitted to the crankshaft 5 and the outer periphery of the rotor 7. It is mainly composed of a fitted stator 8.

The gas compressed by the compressor 3 flows upward in the tightly closed container 2 through a through hole 9 provided in the rotor 7, and is guided by a discharge pipe 10 at the top of the closed container 2.

The rotor 7 has an upper end ring 11 at the top, and a plurality of protruding shafts 12 projecting from the upper end of the upper end ring 11 are fitted with a balancer 13 and an oil separating disk 14, It is fixed by crimping the upper end of the protruding shaft 12.

[0005]

[Problems to be solved by the device]

 By the way, when the rotor 7 is fitted on the crankshaft 5, in order to position the rotor 7 so as not to cause an angular deviation, the crimped portion 15 is conventionally made to largely project from the upper surface of the disk 14 and is used as a reference. Therefore, it is necessary to prevent the occurrence of turbulence due to the protruding caulking portion 15 that causes vibration and an increase in the amount of oil to be discharged. After the rotor 7 is fitted on the crush shaft 5, the disc 14 is covered with the caulking portion 15. It was necessary to attach the cover 16. Further, the top of the rotor 7 is raised by the amount corresponding to the disc cover 16, so that the hermetic compressor is increased in size and weight.

It should be noted that the shape of the disk cover 16 has little effect of oil separation, and the performance of oil separation is insufficient for high-speed operation of compressors in recent years. Is difficult to process into a complicated shape.

The present invention has been made in consideration of the above circumstances, and it is not necessary to cover the crimped portion with a disk cover, and the disk cover can be easily designed into a shape that makes the disk cover unnecessary or increases the oil separation effect. It is an object of the present invention to provide a hermetic compressor that is compact and lightweight.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a hermetic compressor in which a balancer and an oil separating disk are attached to an upper end ring of a rotor of an electric motor by caulking a salient shaft, and at least one of the upper end ring, the balancer and the disk. One of them is provided with a positioning notch, and the disc is provided with a recess for accommodating the caulked portion of the protruding shaft flush with the disc upper surface.

[0009]

[Action]

 Since the positioning notch is provided on at least one of the upper end ring, the balancer, and the disc, it is not necessary to make the caulked portion of the salient shaft protrude significantly as in the conventional hermetic compressor, and the salient shaft is attached to the disc. Since the concave portion for accommodating the crimped portion of the disk is flush with the upper surface of the disk, the upper surface of the disk becomes a flat surface without turbulence. Therefore, it is not necessary to cover the crimped portion with the disk cover, the disk cover can be eliminated, and the hermetic compressor can be made compact and lightweight. In addition, when the disk cover is provided, it is not necessary to cover the caulked portion, so that it is possible to easily design and process the shape to enhance the oil separation effect.

[0010]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In FIGS. 1 and 2, reference numeral 7 denotes a rotor of an electric motor 4 of a hermetic compressor, an upper end ring 11 is provided on the top of the rotor, and a plurality of, more specifically, upper ends of the upper end ring 11 are provided. Is provided with three projecting shafts 12 projecting at substantially equal intervals in the circumferential direction. These protruding shafts 12 are composed of a lower thick shaft portion 12a and an upper thin shaft portion 12b.

An arc-shaped balancer 13 having a shaft hole 17 that fits into the thick shaft portion 12a of the two protruding shafts 12 is mounted on the upper end portion of the upper end ring 11, and further on the balancer 13. Is mounted with a ring-shaped oil separating disk 14 having a shaft hole 18 that fits into the thin shaft portions 12b of the three protruding shafts 12. The balancer 13 and the disk 14 caulk the thin shaft portion 12b at the upper end of the protruding shaft 12. It is fixed by crushing.

In particular, the upper end ring 11 and the balancer 13 are formed with positioning notches 19 for determining an angle when the rotor 7 is fitted to the crankshaft 5. These notches 19 are formed in a shape in which both upper end portions 20a of the U-shaped positioning jig 20 are engaged.

Further, a concave portion 21 for accommodating the crimped portion 15 of the protruding shaft 12 flush with the upper surface of the disk 14 is formed in the upper peripheral portion of the shaft hole 18 of the disk 14. Since these concave portions 21 are formed by press molding, convex portions 22 are formed on the lower surface of the disk 14 on the contrary, and these convex portions 22 serve as a leg seat on the end surface of the thick shaft portion 12a of the protruding shaft 12. ing.

Further, in the present embodiment, the disk 14 is fitted with a cylindrical cover 24 having an upper end having a flange 16a which fits in the central hole 14a and contacts the upper peripheral edge of the hole 14a. The lower end portion 24b of the rotor is squeezed so as to fit into the crankshaft fitting hole 23 of the rotor 7 and inserted into the fitting hole 23. The cover 24 is provided in order to further improve the oil separation performance of the compressor, and may be attached if necessary.

According to the above configuration, since the upper end ring 11 and the balancer 13 are provided with the positioning notch portion 19, the caulking portion 15 of the protruding shaft 12 is used for positioning as in the conventional hermetic compressor. Since there is no need to make a large protrusion, and since the disk 14 is provided with a recess 21 for accommodating the crimped portion 15 of the protruding shaft 12 so as to be flush with the upper surface of the disk 14, the upper surface of the disk 14 is a flat surface that does not cause turbulence. Therefore, it is not necessary to cover the crimped portion 15 with a disc cover as in the conventional case.

Therefore, the disk cover can be eliminated, and the size and weight of the hermetic compressor can be reduced accordingly. Further, when the cover 24 is provided, it is not necessary to cover the crimped portion 15, so that the lower end portion 24b is inserted into the crankshaft fitting hole 23 of the rotor 7 as shown in FIG. It is possible to easily design and process the oil into a shape that enhances the oil separation effect by partitioning the oil into a ring shape to eliminate the blow-up in the central part.

Although the positioning notch 19 is provided in both the upper end ring 11 and the balancer 13 in the above embodiment, either one may be provided or the disc 14 may be provided. Further, the positions and shapes of these notches 19 are not limited, and for example, the diameters of the upper end ring 11 and the balancer 13 so as to engage with the inner facing surface 20b of the U-shaped positioning jig 20 as shown in FIG. It is also possible to provide notches 19 in a shape that is cut off tangentially on opposite sides in the direction.

[0019]

[Effect of the device]

 In summary, according to the present invention, at least one of the upper end ring, the balancer, and the disc is provided with the positioning notch, so that it is not necessary to largely project the caulking portion of the salient shaft unlike the conventional hermetic compressor. Moreover, since the disc is provided with a recess for accommodating the caulked portion of the protruding shaft flush with the disc upper surface, the disc upper surface becomes a flat surface without turbulence, and the caulked portion does not need to be covered with the disc cover. ..

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of a hermetic compressor according to the present invention.

FIG. 2 is an exploded perspective view of the same main part.

FIG. 3 is an exploded perspective view of an essential part showing another embodiment of the present invention.

FIG. 4 is a sectional view showing a conventional hermetic compressor.

FIG.

[Explanation of symbols]

 4 Electric Motor 7 Rotor 11 Upper End Ring 12 Projection Shaft 13 Balancer 14 Oil Separation Disk 19 Positioning Notch 21 Recess

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[Procedure amendment]

[Submission date] October 5, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of a hermetic compressor according to the present invention.

FIG. 2 is an exploded perspective view of the same main part.

FIG. 3 is an exploded perspective view of an essential part showing another embodiment of the present invention.

FIG. 4 is a sectional view showing a conventional hermetic compressor.

[Explanation of symbols] 4 electric motor 7 rotor 11 upper end ring 12 protruding shaft 13 balancer 14 oil separation disk 19 notch for positioning 21 recess

Claims (1)

[Scope of utility model registration request] 1. A hermetic compressor in which a balancer and an oil separating disk are attached to an upper end ring of a rotor of an electric motor by caulking a salient shaft, wherein at least one of the upper end ring, the balancer and the disk has a positioning notch. And a recess for accommodating the caulked portion of the protruding shaft flush with the disc upper surface.