JP2002005019A - Device for protecting parts of electric equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that a hermetic casing of hermetic compressor becomes to be sphere shape for high pressure use, so a flat face 2 around a closed terminal 7 is considerably lessed than before, therefore a gasket 4 tends to move when mounting a terminal cover 5, this causes a clearance between gasket 4 and the casing 1 allowing water infiltration. SOLUTION: Deviation from the place on installing the terminal cover can be prevented and rainwater can be prevented from entering by preparing a projecting rib 4 (a) on a gasket 4 covering around the enclosed terminal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a protection device for an electric component.

[0002]

2. Description of the Related Art A conventional protection device for an electric component is constructed as shown in, for example, Japanese Utility Model Publication No. 57-26391. Here, a conventional example will be described with reference to this publication. FIG. 5 is an exploded perspective view of the compressor protection device, and FIG.
FIG. 7 is a plan sectional view of the protection device mounting portion, and FIG. 7 is a vertical sectional view of the portion AA in FIG. In the figure, reference numeral 1 denotes a closed container forming an envelope of a closed type compressor, and a flat surface 2 is provided on an upper wall of the container. 7 embeds a part in the closed container 1 and
The other part is a sealed terminal that protrudes to the outside of the sealed container 1, and a plurality of connection terminals 9 are protruded from the sealed terminal.

[0003] Reference numeral 3 denotes a protective device mounted on the flat surface 2 of the sealed container 1, and reference numeral 5 denotes a terminal cover for accommodating the sealed terminal 7. The terminal cover is formed of an electrically insulating material such as a synthetic resin. ing. Reference numeral 11 denotes an outlet from which a lead wire (not shown) connected to the connection terminal 9 of the sealed terminal 7 is drawn, and is formed on the lower end 5 a side of the terminal cover 5. Reference numeral 4 denotes a gasket interposed between the terminal cover 5 and the closed container 1.

Reference numeral 6 denotes a rod protruding from the upper portion of the outer surface of the sealed container 1 and provided mainly for fixing the terminal cover. Reference numeral 12 denotes a hole formed in the terminal cover 5 and penetrating in the vertical direction. It is formed slightly larger than the outer diameter of the rod 6. Reference numeral 8 denotes a nut screwed to the rod 6.

[0005] In the electrical component protection device 3 of this structure, the hole 10 of the gasket 4 and the hole 12 of the terminal cover 5 are inserted into the rod 6 and the terminal cover 5 is tightened with the nut 8 so that the terminal cover is closed. 1 is hermetically fixed so that moisture and the like do not enter the terminal cover 5.

Here, in the conventional closed container 1, since the area of the flat surface 2 provided on the upper wall is large, the terminal cover 5 is attached so as to be displaced about the hole 12 as shown in FIGS. However, the airtightness was sufficiently ensured between the gasket 4 and the sealed container 1.

[0007]

However, in recent years, hydrofluorocarbon (H.sub.H) has been used as an operating refrigerant of a compressor which is less affected by the problems of ozone layer depletion and global warming.
FCs and hydrocarbons (HC) are being shifted to refrigerants, and these refrigerants have a higher operating pressure than conventional hydrochlorofluorocarbon (HCFC) refrigerants.

In view of the above, the hermetic container forming the outer cover of the hermetic compressor is being made into a spherical shape that can withstand use at a higher pressure, and the flat surface 2 around the hermetic terminal 7 is significantly reduced in comparison with the prior art. Was. For this reason, the conventional flat gasket 4 is displaced when the terminal cover 5 is attached,
There is a problem that a gap is formed between the gasket 4 and the sealed container 1 so that water easily enters.

The present invention solves the above problems,
An object of the present invention is to provide a protection device for an electrical component provided with a gasket having excellent mounting workability and insulation properties.

[0010]

According to the first aspect of the present invention, a terminal cover for accommodating an electric component such as a sealed terminal is attached to an outer wall of a compressor via a gasket. In the protective device, the gasket is provided with a convex rib surrounding the periphery of the sealed terminal, thereby preventing the terminal cover from being displaced.

According to a second aspect of the present invention, the ribs of the gasket have a tapered configuration in which the outer diameter becomes smaller toward the distal end, thereby guiding the assembly of the terminal cover.

According to a third aspect of the present invention, the gasket is made of rubber or a synthetic resin having high elasticity, and is formed by molding, so that a convex rib is easily formed.

According to a fourth aspect of the present invention, there is provided a protection device in which a terminal cover for accommodating an electric component such as a sealed terminal is attached to an outer wall of a compressor via a gasket. In addition, by providing a configuration in which a flange is formed on the outer wall opposite to the sealing terminal, the contact between the opening end and the gasket is made uniform.

[0014]

Embodiments of the present invention will be described with reference to the drawings. Note that the same reference numerals are used for the same configurations as those in the related art.

The present invention will be described below with reference to the embodiment shown in FIGS. 1 is an exploded perspective view of a protection device of the compressor, FIG. 2 is a plan sectional view of a protection device mounting portion, and FIG. 3 is a longitudinal sectional view of a BB portion in FIG. In the figure, reference numeral 1 denotes a cylindrical hermetic container in which an electric compressor main body (not shown) is housed. 2 are provided. 3
Is a protection device mounted on the flat surface 2 of the closed container 1, which is a gasket 4 installed on the flat surface 2 of the closed container 1, a terminal cover 5 placed on the gasket, While pressing the cover against the gasket 4, the nut 6 is attached to the rod 6 fixed to the closed container 1.
Are screwed and fixed.

The terminal cover 5 houses a sealed terminal 7 which is attached through the flat surface 2 of the sealed container 1, and a plurality of connection terminals 9 are protruded from the sealed terminal 7. Reference numeral 11 denotes a lead-out portion (not shown) connected to the connection terminal 9 of the sealed terminal 7, which is provided on the terminal cover 5, and formed by inclining the upper wall 16 so as to become lower toward the outside. I have.

The gasket 4 has a plate shape slightly larger than the outer shape of the opening end 5a of the terminal cover 5 and is formed of rubber or synthetic resin having high elasticity. The gasket 4 is provided with an opening 21 penetrating the sealing terminal 7 and an opening 10 penetrating the rod 6, and the opening 21 is formed with a convex rib 4a surrounding the periphery of the terminal. The outer diameter of the rib 4a is formed slightly smaller than the inner wall shape of the opening end 5a of the terminal cover 5. Also, terminal cover 5
Also, a hole 12 is provided through the rod 6, and a flange 13 is formed on the outer wall of the opening end 5a on the side opposite to the sealed terminal.
Is molded.

The order of assembling the protection device 3 in the protection device for electrical components configured as described above will be described. First, the gasket 4 is attached to the flat surface 2 of the sealed container 1. Then, lead wires are respectively connected to the connection terminals 9 of the sealed terminal 7. Next, bundle the lead wires and make the terminal cover 5
Then, the terminal cover 5 is covered so that the lead wire passes through the take-out portion 11, and the nut 8 is screwed and fixed to the rod 6 to assemble the protection device 3.

Here, the convex ribs 4a formed on the gasket 4 are positioned when the terminal cover 5 can be covered, and the positional displacement of the terminal cover 5 can be prevented, thereby preventing rainwater or the like from entering. It becomes possible.

FIG. 4 is a sectional view of a main part of a gasket 4 according to another embodiment of the present invention. The rib 4a of the gasket 4 has a tapered shape in which the outer diameter becomes smaller toward the tip. By providing the terminal cover 5, the terminal cover 5 can be guided, and the troublesome positioning work required in the conventional flat gasket shape is unnecessary, so that the mounting workability can be improved. Will be possible.

Further, the gasket 4 is formed by molding using a rubber or a synthetic resin material having high elasticity, and the rib having a convex shape can be easily formed. By the method of fixing the gasket to the closed container 1, the gasket is deformed and adhered, and it is possible to provide at low cost a protection device for electrical components that can improve the sealing performance.

The terminal cover 5 has an open end 5.
a, and a flange portion 13 is formed on the outer wall opposite to the sealing terminal 7, and a fixing rod 6 insertion hole 12
From the position of the terminal 7 and the opposite side to the open end 5a
And the gasket 4 contact area is reduced. Thereby, the pressing of the gasket 4 can be made uniform,
The sealing property is ensured, and it is possible to reliably prevent infiltration of rainwater or the like.

[0023]

As described above, according to the first aspect of the present invention, there is provided a protection device in which a terminal cover for accommodating an electric component such as a sealed terminal is attached to an outer wall of a compressor via a gasket. Since the gasket is provided with a rib having a convex shape surrounding the periphery of the sealed terminal, it is possible to prevent the terminal cover from being displaced and prevent rainwater or the like from entering.

According to the second aspect of the present invention, the ribs of the gasket have a tapered configuration in which the outer diameter becomes smaller toward the tip, so that the terminal cover can be guided for assembly. Further, since complicated positioning work as in the related art is not required, mounting workability can be improved.

According to the third aspect of the present invention, since the gasket is made of rubber or synthetic resin having high elasticity and is formed by molding, the convex rib can be easily formed, It is possible to provide a gasket that can improve sealing performance at a low price.

According to a fourth aspect of the present invention, in a protection device in which a terminal cover for housing electrical components such as a sealed terminal is attached to an outer wall of a compressor via a gasket, the terminal cover has an open end. In addition, by providing a configuration in which a flange portion is formed on the outer wall opposite to the sealing terminal, the contact between the opening end and the gasket can be made uniform, whereby the sealing performance is ensured and rainwater or the like is ensured. Can be reliably prevented from entering.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a compressor protection device according to an embodiment of the present invention.

FIG. 2 is a plan sectional view of a protection device mounting portion of the present invention.

FIG. 3 is a longitudinal sectional view taken along a line BB in FIG. 2;

FIG. 4 is a sectional view of a main part of a gasket showing another embodiment of the present invention.

FIG. 5 is an exploded perspective view of a conventional compressor protection device.

FIG. 6 is a plan sectional view of a conventional protection device mounting portion.

FIG. 7 is a longitudinal sectional view taken along the line AA of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 3 Protective device 4 Gasket 4a Rib 5 Terminal cover 7 Sealed terminal 13 Flange

Claims (4)

[Claims] 1. A protection device in which a terminal cover for accommodating an electric component such as a sealed terminal is attached to an outer wall of a compressor via a gasket, wherein the gasket has a convex rib surrounding the periphery of the sealed terminal. A protection device for electrical components, comprising: 2. The protection device according to claim 1, wherein the rib of the gasket has a tapered shape in which an outer diameter becomes smaller toward a tip. 3. The protection device according to claim 1, wherein the gasket is made of rubber or synthetic resin having high elasticity, and is formed by molding. 4. A protective device in which a terminal cover for housing electrical components such as a sealed terminal is attached to an outer wall of a compressor via a gasket, wherein the terminal cover has an open end and a sealed terminal. A protection device for electrical components, characterized in that a flange portion is formed on an outer wall on the opposite side of the electronic component.