JPH10108409A - Protective device for electric equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a protective device for electric equipment that allows cost to be reduced, has versatility and is excellent in installing workability and insulation performance, by forming a gasket into a shape similar to the shape of the open end of a terminal cover. SOLUTION: A gasket 4 is formed into a band shape similar to the shape of the open end 5a of a terminal cover, and a groove 23 into which the open end 5a of the terminal cover 5 is to be fit is formed in the central portion of the band-shaped gasket. A large opening 21, 22 through which a sealed terminal 7, an overload relay and rod 6a are to be inserted, is formed in the gasket 4, and a hole 24 through which the rod 6a is to be inserted is formed in the terminal cover 5 as well. Therefore, it is possible to form the gasket 4 using a minimum of material for the prevention of the entry of rainwater and the like, and to easily apply it to compressors that use internal protectors and those that use external overload relays.

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. In FIG. 4, reference numeral 50 denotes a hermetic container which forms a jacket of the hermetic compressor, 51 denotes a rod which protrudes to the upper portion of the outer surface of the hermetic container and is provided mainly for supporting the compressor, and 52 denotes a rod which A sealed terminal that is partially buried in the closed container 50 and that protrudes the other portion to the outside of the closed container 50, and a plurality of connection terminals 53 protrude from the sealed terminal.

Reference numeral 54 denotes a terminal cover having a terminal chamber 55 for accommodating the sealed terminal 52. The terminal cover is formed of a material having electrical insulation and elasticity, such as rubber. Reference numeral 56 denotes a hole formed in the terminal cover 54 and penetrating in the vertical direction. The inner diameter of the upper end of this hole is formed slightly smaller than the outer diameter of the rod 51. Reference numeral 57 denotes a protector chamber formed integrally with the terminal cover 54 to accommodate an overload relay (not shown). A step for pressing the overload relay at the lower end of the protector chamber and bringing the overload relay into close contact with the outer surface of the sealed container 50. A part 60 is provided.

[0006] Reference numeral 61 denotes an outlet from which a lead wire connected to the terminal of the overload relay or a lead wire connected to the connection terminal 53 of the sealed terminal 52 is formed, and is formed at a lower end of the terminal cover 54. 63 is a gasket interposed between the terminal cover 54 and the sealed container 50, and 64 is a nut screwed to the rod 51.

In the protective device for an electric component having this structure, the hole 65 of the gasket 63 and the hole 56 of the terminal cover 54 are inserted into the rod 51, and the terminal cover 54 is tightened with the nut 64. To the terminal cover 54
It is designed to prevent moisture and the like from entering the inside.

[0006]

However, the gasket 63 has large holes 66 and 67 for inserting the sealed terminal 52 and the overload relay, and the entire shape of the gasket 63 becomes large, so that a large amount of material is required. In addition, the compressors of the type using the internal protector and the type using the external overload relay have a problem that the holes 66 and 67 are unnecessary and lack versatility. .

In addition, when the gasket 63 is mounted, the sealing terminal 52 and the overload relay must be securely inserted and set in the holes 66 and 67, so that the mounting workability is poor and insulation is not considered. There was a problem.

The present invention solves the above problems,
The aim is to provide a protection device for electrical components equipped with a gasket that can reduce the cost by greatly reducing the material, and has versatility corresponding to the type of compressor, and is excellent in mounting workability and insulation. It is what it was.

[0009]

According to the present invention, a terminal cover accommodating an electric component is provided as described in claim 1.
In the protective device attached to the outer wall of the compressor via a gasket, the gasket is formed in a shape similar to the shape of the opening end of the terminal cover.

According to a second aspect of the present invention, there is provided a protective device in which a terminal cover accommodating electrical components is mounted on an outer wall of a compressor via a gasket, wherein the gasket has the same shape as the opening end of the terminal cover. The terminal is formed in a band shape, and a groove is formed in the center of the band shape to fit the opening end of the terminal cover.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiment shown in FIG. Reference numeral 1 denotes a cylindrical hermetic container in which an electric compressor main body (not shown) is housed, and a flat surface 2 is provided on an upper wall of the container. Reference numeral 3 denotes a protection device mounted on the flat surface 2 of the closed container 1. The protection device includes 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 terminal cover against the gasket 4, the sealed container 1
And a rod 6a and a nut 6b which are fixed to the base. In the terminal cover 5, a sealed terminal 7 attached through the flat surface 2 of the sealed container 1 and an overload relay (not shown) are housed.

The sealing terminal 7 is provided with a plurality of connecting terminals 9 protruding therefrom. The overload relay also has a plurality of terminals.

Reference numeral 11 denotes a take-out portion provided on the terminal cover 5. The take-out portion is a guide 13 for guiding a lead wire (not shown) connected to the connection terminal 9 of the sealed terminal 7 and the terminal of the overload relay, respectively. The guide is formed by an outlet 14 provided at the base of the guide. That is, the take-out part 11 for drawing out the lead wire is formed at the center in the height direction of the cover 5, and the guide 13 is formed so as to cover the draw-out opening 14.

The guide 13 is formed such that the side wall 15 is widened toward the inside and the upper wall 16 is inclined so as to be lowered toward the outside. The connection terminal 9 of the sealed terminal 7 and the terminal of the overload relay are connected within the terminal cover 5 by a lead wire.

The gasket 4 is formed in a band shape similar to the shape of the opening end portion 5a of the terminal cover 5, and the center of the band shape has an opening end portion 5 of the terminal cover 5.
A groove 23 into which a is fitted is formed. The gasket 4 is provided with large openings 21 and 22 penetrating the sealing terminal 7, the overload relay and the rod 6a, and the terminal cover 5 is also provided with a hole 24 penetrating the rod 6a.

The order of assembling the protection device 3 in the protection device for electrical components configured as described above will be described. First, the groove of the gasket 4 is fitted into the opening end 5a of the terminator cover 5 to be integrated. . Then, the overload relay is set at a predetermined position on the flat surface 2 of the sealed container 1, and lead wires are respectively connected to the terminals of the overload relay and the connection terminals 9 of the sealing terminal 7. Next, after bundling the lead wires and pulling them out of the cover from the outlet 14 of the extraction portion 11 of the terminal cover 5 through the lead wires, the terminal cover 5 with the gasket 4 integrally mounted thereon is covered,
The nut 6b is screwed into the rod 6a and fixed to secure the protection device 3
Is assembled.

Here, since the gasket 4 is formed in a band shape similar to the shape of the opening end 5a of the terminal cover 5, it is possible to form the gasket 4 with a minimum material for preventing infiltration of rainwater or the like. In addition to the above, it can be easily adapted to a compressor using an internal protector or a compressor using an external overload relay.

The gasket 4 has a groove 23 into which the opening end 5a of the terminal cover 5 is fitted at the center of the band.
When the gasket 4 is mounted, the cover 5 and the gasket 4 are integrated only by fitting the groove 23 of the gasket 4 into the opening end 5a of the terminal cover 5. Since the mounting work can be performed with, the troublesome positioning work like the conventional one is not required,
Mounting workability and insulation can be improved.

Since the outlet 14 of the take-out portion 11 is formed at the center of the terminal cover 5 in the height direction,
The lower end surface of the cover 5 is flat, and the lower end surface and the gasket 4 can be closely contacted over the entire circumference. In addition, since the outlet 14 is covered with the guide 13, the sealing action of the gasket 4 does not work at the outlet 14 as in the related art, and moisture such as rainwater is covered by the gap between the outlet 14 and the lead wire. You can avoid getting inside,
It is possible to reliably prevent rainwater from entering, and to prevent electric components inside the cover 5 from being damaged.

Further, the guide 13 of the take-out section 11 is
And the upper wall 16 is formed so as to be inclined so as to become lower toward the outside, so that the lead wires collected at the outlet 14 can be connected to the connection terminal 9 of the sealed terminal 7 or the overload relay. The lead wire can be drawn out substantially linearly from the terminal connection portion, and the lead wires can be prevented from overlapping at the outlet 14.

[0021]

As described above, according to the present invention, since the gasket is formed in a band shape similar to the shape of the opening end of the terminal cover, the gasket is formed with a minimum material for preventing infiltration of rainwater and the like. In addition to being able to reduce costs, it can be easily adapted to a compressor using a type using an internal protector or a type using an external overload relay, thereby improving versatility.

In the gasket, a groove is formed in the center of the band to fit the opening end of the terminal cover. Therefore, when the gasket is mounted, the gasket is inserted into the opening end of the terminal cover. By simply fitting the grooves, mounting work can be performed with the cover and gasket integrated, eliminating the need for cumbersome positioning work as in the past. Can be improved.

[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 view of a gasket.

FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2;

FIG. 4 is an exploded perspective view of a compressor protection device showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 3 Protective device 4 Gasket 5 Terminal cover 7 Sealed terminal 11 Extraction part 13 Guide 14 Outlet 15 Side wall 16 Upper wall 23 Groove

Claims (2)

[Claims] 1. A protection device in which a terminal cover accommodating electrical components is attached to an outer wall of a compressor via a gasket, wherein the gasket is formed in a shape similar to a shape of an opening end of the terminal cover. A protection device for electrical components. 2. A protection device in which a terminal cover accommodating electrical components is attached to an outer wall of a compressor via a gasket, wherein the gasket is formed in a strip shape similar to the shape of the opening end of the terminal cover. A groove for fitting an opening end of the terminal cover is formed in a central portion of the band shape, wherein the protection part is provided for an electrical component.