JPH02146273A - Closed type electric compressor - Google Patents

Abstract

PURPOSE:To perform the fitting of a balancer simply as well as positively by laminating plural thin plates and fixing these thin plates at eyelets so as to form the balancer as well as caulking the balancer fixedly at the dowel of a rotor and ring through eyelet holes. CONSTITUTION:In a closed type electric compressor, a rotor 1 is fixed at a crankshaft 3 rotated in a cylinder 2, and a compression element and a transmission element are integrally connected. A balancer is fitted at the end face of a rotor end ring 4. In this case, the balancer is formed by laminating plural thin plates of the same form punched by a press as well as inserting a ring fitting 5c into an eyelet hole bored in each thin plate 5a. After each thin plate 5a is jointed at the eyelet, the whole thing is fixedly caulked at a fitting dowel 4a formed integrally at the end face of the rotor end ring 4. The fitting of the balancer 5 is thus performed simply as well as positively.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Field of Industrial Application) This invention relates to a hermetic electric compressor mainly used for refrigeration and air conditioning, and particularly to a hermetic electric compressor that reduces the amount of unbalance in a rotating shaft system. Installing a balancer involves improving the parts.

(Prior Art) In a conventional hermetic electric compressor, as shown in FIG. Fixed.

In order to balance these rotating systems, a balancer (balance weight) 5 is attached to the rotor end ring 4.

The balancer 5 is a thin plate 5 of the same shape punched by a press.
It is formed by stacking a large number of A and fixing them.

Therefore, when attaching the balancer 5 to the rotor end ring 4, the optimum weight can be selected by adjusting the number of stacked plates.

The rotor 1 is formed by aluminum die-casting after stacking electromagnetic steel plates punched with a press, but the balancer is attached using a dowel during die-casting.
4a is integrally molded with the rotor end ring 4 in advance, and the balancer 5 is attached by inserting a hole previously formed during pressing into this dowel 4a.

However, when actually assembling this hermetic electric compressor, if the number of laminated thin plates 5a constituting this balancer 5 increases, it becomes necessary to attach the relatively small number of thin plates 5a to the end ring 4. It takes time and effort to assemble the parts while aligning them, so there was a need to improve the work efficiency.

(Problems to be Solved by the Invention) In conventional hermetic electric compressors, it takes time to assemble and fix the balancer to the end ring of the rotor because the number of laminated sheets must be aligned and assembled one by one, which causes problems in the manufacturing process. It had become.

SUMMARY OF THE INVENTION Therefore, the object of this invention is to provide a hermetic electric compressor that improves the assembly structure of the balancer, allows the balancer to be assembled in advance with simple work, and also allows for easy attachment to the end ring. shall be.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a hermetic electric compressor in which an electric element and a compression element are housed in a closed container, and a balancer is provided on the rotor end ring end face of the electric element. A large number of hammer-formed thin plates are laminated, and a balancer is fixedly formed with an eyelet through a hole commonly provided in each of these thin plates, and this balancer is connected to the eyelet. It is characterized by being caulked and fixed to a dowel on the rotor end ring through a hole.

(Function) The present invention is configured as described above, and is capable of fixing a thin plate at an eyelet through a through hole formed by punching in advance, and thereby fixing a balancer to a rotor end ring. , which utilizes the eyelet holes mentioned above.

Therefore, the assembly of the balancer can be carried out separately and independently from the manufacturing process of the compressor, and since it is fixedly assembled using eyelets, it can be manufactured very easily and efficiently.

Furthermore, the incorporation into the end ring utilizes the eyelet hole, and can be easily fixed to the dowel by simply caulking the dowel.

(Example) Hereinafter, a first example of the hermetic electric compressor according to the present invention will be described.
This will be explained in detail with reference to FIGS. 4 to 4. In addition, the fifth
Components that are the same as those shown in the figures are given the same reference numerals, and detailed explanations will be omitted.

That is, in FIG. 1, a rotor 1 is fixed to a crankshaft 3 rotating within a cylinder 2, and a compression element and an electric element are integrally connected.

A dowel 4a for mounting a balancer 5 is integrally provided at the end of the rotor end ring 4.

Therefore, the balancer 5 is formed by stacking and fixing thin plates 5a of the same shape punched by a press, and as shown in FIG. The laminated thin plates 5a are inserted and fixed together as shown in FIG.

This balancer 5 is manufactured by adjusting and selecting the number of laminated thin plates 5a in advance, so when assembling the compressor, as shown in FIG.
Insert it into the holder and press and fix it by caulking.

As described above, in the hermetic electric compressor according to the present invention, the balancer 5 is easily formed and installed by joining a plurality of thin sheets 5a with eyelets, and fixing and covering the balancer 5 by caulking. This was achieved through a simple work process. Therefore, according to the present invention, a conventional thin plate for a balunry can be easily assembled without changing its shape, for example, without requiring special protrusions for caulking or special operations such as fixing by welding. It has the great advantage of being easily manufacturable.

[Effect of the invention 1 In summary, according to the hermetic electric compressor of the present invention,
Assembling the balancer using the eyelet and caulking it to the dowel of the end ring using the hole in the eyelet's tubular metal fitting were both easy tasks, and the effects obtained in practical use. is a must.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an embodiment of the closed type electric compression according to the present invention, and FIG. 2 is an exploded perspective view showing how the balancer is assembled and incorporated into the rotor end ring in the compressor shown in FIG. 1. 3 is a partially cutaway sectional view of the balancer shown in FIG. 1; FIG. 4 is a partially cutaway sectional view showing the rotor end ring after the balancer is assembled in FIG. 1;
FIG. 5 is a sectional view showing a conventional hermetic electric compressor. 1... Rotor 2... Cylinder 3... Crankshaft 4... Rotor end ring 4a... Dowel 5... Balun 1 no. 5a... Thin plate 5b... Hole 5C.・Tubular metal fittings agent Patent attorney Norio Ogo

Claims (1)

[Claims] In a hermetic electric compressor in which an electric element and a compression element are housed in an airtight container and a balancer is provided on the rotor end ring end face of the electric element, a large number of stamped thin plates are laminated, and a balancer is provided in common to each of these thin plates. The balancer is fixed to a dowel on the rotor end ring through the eyelet hole, and the balancer is caulked and fixed to a dowel on the rotor end ring through the eyelet hole. Hermetic electric compressor.