JPH0218880A - Terminal connecting device for sealed compressor - Google Patents

Abstract

PURPOSE:To reduce the number of parts used, facilitate works for fitting, and accomplish a terminal connecting device with high reliability by providing a cluster with an insulative covering member consolidated as in a single piece, wherein the covering member is fitted in a metal outer ring of an air-tight terminal so as to block the opening of outer ring. CONSTITUTION:An air-tight terminal 5 is provided with a cup-shaped outer ring 6 of metal and a pin 8 installed upright in the center of this outer ring through a glass part 7, so as to penetrate the inside and outside of an enclosure case 2, and fixed so that the opening 9 of this same 5 faces the inside of the case 2. The pin 8 is inserted in a pin insert hole 15 while an insulative covering member 13 formed on a cluster 10 in a single piece is fitted by pressure into the outer ring 6. Thereby the opening 9 of the outer ring 6 is blocked at the same time connecting operation of cluster 10, and the covering member 13 has a comparatively large thickness, so that close and storing contact is accomplished to the inside of the outer ring 6. Also the covering member 13 is prevented from rattling caused by air intrusion to the inside thereof, and metal powder is avoided to flow into the inside of the terminal 5 and attach to the glass part 7, and also electric leakage or breakage of the terminal due to spark can be precluded in advance.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a terminal connection device for a hermetic compressor used in refrigerators, showcases, etc.

(B) Conventional technology Conventionally, the terminal connection device for this type of hermetic compressor has been constructed by connecting the electric motor part and the motor part in a sealed case storing lubricating oil, as described in Japanese Utility Model Publication No. 54-30643. A compressor unit that drives the electric motor unit is housed, and an airtight terminal having a cup-shaped metal outer ring is fixed to the sealed case, and a cluster electrically connected to the electric motor unit is connected to a pin inside the sealed case of this terminal. It was composed of

However, with such a configuration, the glass part of the airtight terminal is exposed to the refrigerant atmosphere in the sealed case, so abraded metal powder in the refrigerant is likely to adhere to the glass part, and if the amount of adhesion increases, the compressor may be regenerated. There was a problem in that sparks could fly between the pin and the metal outer ring during startup, etc., leading to accidents such as electrical leakage and damage to the terminals.

Therefore, as shown in Japanese Patent Application Laid-Open No. 62-27195, the applicant fitted a cap made of a thin resin plate as a separate part to the inside of the sealed case of the metal outer ring of the airtight terminal so that metal powder could not be absorbed into the glass part of the terminal. I proposed something that would prevent it from attaching.

(C) Problems to be Solved by the Invention However, the above configuration requires a separate cap, which not only increases the number of parts, but also requires installation work, which increases the number of work steps. Since the cap is a thin plate, there is a problem in that air gets into the cap and it tends to flap, and the insulation of the glass part is not perfect.

The present invention has been made in view of the above, and is a sealed type that can insulate the glass portion of an airtight terminal with a simple structure without increasing the number of parts or work hours, and has good insulation properties. The purpose of the present invention is to provide a terminal connection device for a compressor.

(d) Means for Solving the Problems The present invention provides an airtight system in which an electric motor section and a compressor section for driving the motor section are housed in a sealed case that stores lubricating oil, and the sealed case has a cup-shaped metal outer ring. A terminal is fixed and a cluster electrically connected to the motor section is connected to a pin inside the sealed case of the terminal, and the cluster is fitted into the metal outer ring of the airtight terminal and has an opening in the outer ring. An insulating cover member that closes the book is integrally formed.

(*) Function The terminal connection device for a hermetic compressor of the present invention has the above-described configuration, and at the same time as the cluster is connected to the airtight terminal, the opening of the metal outer ring of the terminal can be closed with the insulating cover member, Not only can the number of parts be reduced, but workability can also be improved.

In addition, since the insulating cover member is integrally formed into the cluster and fitted into the metal outer ring, the insulation of the glass part is improved without air entering the inside of the insulating cover member and causing it to flap. You can improve.

Kube) Example Embodiments of the present invention will be described below based on the drawings.

Reference numeral 1 designates a hermetic compressor in which an electric motor section 3 and a compressor section 4 for driving the motor section 3 are housed in a closed case 2 in which lubricating oil is stored at the bottom. Reference numeral 5 denotes an airtight terminal fixed to the side wall of the sealed case 2. This terminal has a cup-shaped metal outer ring 6,
A pin 8 is provided at the center of the outer ring with a glass portion 7 interposed therebetween and penetrates the inside and outside of the sealed case 2, and is fixed so that the opening 9 faces inside the sealed case 2. A cluster 10 is electrically connected to the electric motor section 3 via a lead wire 11. This cluster includes a case 12 made of a synthetic resin material, a disk-shaped insulating cover member 13 made of a synthetic rubber material bonded to one side of the case with an adhesive, and the case 1
2 is connected to the lead wire 11 or the septacle fitting 14
and a pin insertion hole 15 that passes through the case 12 and the insulating cover member 13. The cluster 10 is connected to the airtight terminal 5 by press-fitting the insulating cover member 13 into the metal outer ring 6 of the airtight terminal 5 and inserting the pin 8 into the pin insertion hole 15.

The terminal connection device for a hermetic compressor configured in this way is
Insulating cover member 13 integrally formed with cluster 10
The opening 9 of the metal outer ring 6 can be closed at the same time as the cluster 10 connection operation of inserting the pin 8 into the pin insertion hole 15 while press-fitting the terminal into the metal outer ring 6 of the airtight terminal 5. Since the insulating cover member 13 is formed to be relatively thick, it can be tightly attached to the inside of the metal outer ring 6. This not only makes it possible to reduce the number of parts, but also improves workability during installation by integrating the cluster 10 and the insulating cover member 13 into one part.
It is possible to prevent air from entering the inside of the terminal 3 and causing the member to flap, and to reliably prevent phenomena such as the inflow of metal powder into the inside of the terminal 5 and the adhesion of metal powder to the glass part 7, and to prevent the occurrence of sparks. Damage to the airtight terminal 5 and electrical leakage accidents can be prevented.

Incidentally, on the Kinomi style side, a case 12 of the cluster 10 has been described in which a separate insulating cover member 13 is glued and integrated, but the same result can be achieved even if the insulating cover member 13 is integrally formed with the case 12 in advance. It goes without saying that the effect can be obtained, and the material is not limited to synthetic resin or synthetic rubber; any material can be used as long as it has insulation properties, refrigerant resistance, elasticity, etc.

(g) Effects of the Invention As described above, the present invention not only reduces the number of parts and improves installation workability, but also provides highly reliable hermetic compression with excellent insulating properties of airtight terminals and no terminal damage or leakage. We can provide terminal connection devices for machines.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a hermetic compressor showing an embodiment of the present invention, FIG. 2 is a sectional view of a terminal connecting device, FIG. 3 is a plan view of the same, and FIG. 4 is a sectional view of a cluster. 2... Sealed case, 5... Airtight terminal, 6...
・Metal outer ring, 8...pin, 9...opening,
10...Cluster, 13...Insulating cover member.

Claims (1)

[Claims] (1) The electric motor section and the compressor section that drives it are housed in a sealed case that stores lubricating oil, and an airtight terminal having a cup-shaped metal outer ring is fixed to the sealed case, and the inside of the sealed case of this terminal is fixed. A cluster that is electrically connected to the electric motor section is connected to the pin, and the cluster is integrally formed with an insulating cover member that is fitted into the metal outer ring of the airtight terminal and closes the opening of the outer ring. A terminal connection device for a hermetic compressor, which is characterized by: