JPH08240181A - Protection device for electrical equipment part - Google Patents

Abstract

PURPOSE: To provide a protection device for an electrical equipment parts which is provided for fixing and pulling up a lead wire connected to the electrical equipment parts and which is provided with a terminal cover having a water proof structure. CONSTITUTION: In a protection device which is installed a terminal cover for housing an electrical equipment parts on the outer wall of a compressor through a gasket 4, a taking-out part 11 for pulling out a lead wire connected to the electric equipment parts is arranged on the terminal cover 5. The taking-out part is constituted by a guide 13 for guiding the lead wire and a U-shaped pulling-out port 14 which is arranged on the top end of the guide 13. The guide 13 is inclined in such a constitution that a side wall is enlarged toward an inner side, and also an upper wall is lowered toward an outside.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A conventional device for protecting electrical components is constructed, for example, as shown in Japanese Utility Model Publication No. 57-26391. Here, a conventional example will be described with reference to this publication. Sixth
In FIG. 8 to FIG. 8, 50 is a hermetic container that forms the outer casing of the hermetic compressor, 51 is a rod that protrudes above the outer surface of the hermetic container and is provided mainly for supporting the compressor, and 52 is A sealing terminal is provided in such a manner that a part thereof is embedded in the closed container 50 in the vicinity of this rod and the other part is projected to the outside of the closed container 50, and a plurality of connection terminals 53 are provided so as to project in this sealed terminal. Reference numeral 54 is a terminal cover provided with a terminal chamber 55 for accommodating the sealed terminal 52, and the terminal cover is made of a material having electrical insulation and elasticity such as rubber. Reference numeral 56 is a hole formed in the terminal cover 54 and penetrating in the vertical direction, and the inner diameter of the upper end of this hole is formed slightly smaller than the outer diameter of the rod 51. 57 is a protector chamber which is formed integrally with the terminal cover 54 and accommodates the overload relay 58.The lower end portion of this protector chamber is connected to the flange portion 59 of the overload relay 58 to hold the overload relay in place. A stepped portion 60 is provided which is brought into close contact with the outer surface of the closed container 50. 61 is an outlet for drawing out the lead wire 62 connected to the terminal of the overload relay 58, 63 is an outlet for drawing out the lead wire 64 connected to the connection terminal 53 of the sealed terminal 52, and these outlets are provided at two places. There is. The terminal cover 54 is provided with a slit 65 between the outlet 63 and the contact surface of the closed container 50.

In the protective device for electrical components of this structure, the terminal cover 54 is fixed only by fitting the hole 56 of the terminal cover 54 into the rod 51, and the overload relay 58 is sealed by the step portion 60 of the terminal cover 54. Container 50
And the terminal cover 54
It is designed to prevent water from entering inside.

[0004]

However, since the terminal cover 54 is provided with the terminal chamber 55 for accommodating the sealed terminal 52 and the protector chamber 57 for accommodating the overload relay 58 separately, the connection terminal 53 of the sealed terminal 52 is provided. The lead wire 66 connecting the terminal of the overload relay 58 with the terminal of the overload relay 58 has to be pulled out and connected to the outside of the terminal cover 54, which causes a problem that wiring work becomes difficult.
Moreover, since the lead wires 62 and 64 are not fixed to the outlets 61 and 63, there is a problem that the connection portion of the electrical component is disconnected when an external tensile stress acts on the lead wires.

The present invention solves the above problems,
An object of the present invention is to provide a protective device for an electric component, which is provided with a terminal cover having a waterproof structure, while fixing and pulling out a lead wire connected to the electric component.

[0006]

According to the present invention, a terminal cover attached to the outer wall of a compressor is provided with a lead-out portion for leading out a lead wire connected to an electrical component, and this lead-out portion is provided with a guide for guiding the lead wire. This guide is formed by a U-shaped outlet provided at the tip of the guide, and the side wall of the guide is widened toward the inside and the upper wall is inclined so as to be lowered toward the outside.

Further, according to the present invention, the terminal cover mounted on the outer wall of the compressor through the gasket is provided with a lead-out portion for drawing out the lead wire connected to the electrical component, and the lead wire is pressed against the gasket at the mounting portion. The protruding pieces are provided substantially orthogonal to the lead-out direction of the lead wire, and these protruding pieces are arranged densely on the outside and roughly on the inside.

[0008]

The present invention is constructed as described above,
The side wall of the guide that guides the lead wire of the extraction part is widened toward the inside, and the upper wall is inclined so that it becomes lower toward the outside, so that the lead wire is approximately straight from the connection part of the electrical component to the outlet. The lead wire is prevented from overlapping and drawing out at the outlet.

Further, according to the present invention, by arranging a plurality of projecting pieces provided in the take-out portion densely on the outside and roughly on the inside,
The lead wire is made hard to move outside the lead-out portion so that even if a tensile stress is applied to the lead wire from the outside of the terminal cover, the tensile stress does not act on the connection portion of the electric component.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in FIGS.

Reference numeral 1 denotes a cylindrical hermetic container having an electric compressor body (not shown) housed therein, and a flat surface 2 is provided on an upper wall of the container. Reference numeral 3 denotes a protective device attached to the flat surface 2 of the closed container 1. This protective device includes a gasket 4 installed on the flat surface 2 of the closed container 1, a terminal cover 5 placed on the gasket, and The terminal cover is fixed to the gasket 4 while pressing the terminal cover against the gasket 4, and the fastening metal 6 is provided. The terminal cover 5 accommodates a sealed terminal 7 which is mounted so as to penetrate the flat surface 2 of the sealed container 1 and an overload relay 8. The sealing terminal 7 is provided with a plurality of connecting terminals 9 protruding therefrom. Further, the overload relay 8 is provided with a plurality of terminals 10.

Reference numeral 11 denotes a take-out portion provided on the terminal cover 5, and this take-out portion is a guide 13 for guiding the lead wires 12 respectively connected to the connection terminal 9 of the sealed terminal 7 and the terminal 10 of the overload relay 8. , A U-shaped outlet 14 provided at the tip of this guide. Guide 13
Is formed by widening the side wall 15 toward the inside and inclining the upper wall 16 toward the outside. In addition, the projecting port 14 is provided with three projecting pieces 17, 18 and 19 which are substantially orthogonal to the direction of drawing out the lead wire 12 and which are provided on the upper part so as to face the gasket 4. These projecting pieces are provided separately from the outer end and the inner end of the outlet 14, and two projecting pieces 17 and 18 are provided close to each other on the outer side,
Moreover, one projecting piece 19 is provided inside.

The connection terminal 9 of the sealed terminal 7 and the terminal 10 of the overload relay 8 are connected by a lead wire 20 in the terminal cover 5. The gasket 4 is provided with holes 21, 22, and 23 penetrating the hermetically sealed terminal 7, the overload relay 8 and the tightening fitting 6. The tightening fitting 6 is composed of a bolt 24 attached to the flat surface 2 of the closed container 1 and a nut 25 screwed to the bolt.

In the protective device for electrical components having the above-described structure, the assembling order of the protective device 3 will be described. First, the gasket 4 is attached to the flat surface 2 of the closed container 1. At that time, the gasket 4 is positioned by fitting the holes 21, 21 into the sealing terminal 7 and the bolt 24. Then, the overload relay 8 is installed, and the terminal 10 of this overload relay and the connection terminal 9 of the sealed terminal 7 are installed.
Connect the lead wire 12 to each. Next, with the lead wires 12 bundled and aligned with the position of the take-out portion 11 of the terminal cover 5, the terminal cover 5 is covered, and the nut 25 is screwed and fixed to the bolt 24, and the protection device 3 is assembled.

The guide 13 of the take-out portion 11 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, so that each lead wire gathered at the outlet 14 is formed. 12 is the connection terminal 9 of the sealed terminal 7
The lead wire 12 is drawn out in a substantially straight line from the connection portion of the terminal 10 of the overload relay 8 and the lead wire 12 so as not to overlap each other. Further, the outlet 14 is formed in a U-shape to lengthen the portion where the lead wire 12 is pulled out, so that the water splashed on the terminal cover 5 does not enter into the terminal cover 5.

The three projecting pieces 17, 18 and 19 provided at the outlet 14 for pressing the lead wire 12 against the gasket 4 and fixing it to the outside
By arranging one projecting piece 17 and one projecting piece 19 on the inner side, the lead wire 12 can be firmly fixed on the outer side of the outlet 14, and the tensile stress is applied to the lead wire 12 from the outside of the terminal cover 5. Even if it is applied, the tensile stress does not act on the connection portion of the connection terminal 9 of the sealed terminal 7 and the terminal 10 of the overload relay 8. According to the present invention, the guide wire 13 of the take-out portion 11 of the terminal cover 5 allows the lead wire 12 to be drawn out to the outlet 14 in a substantially straight line shape, and the lead wire 12 is fixed by the protruding pieces 17, 18, 19 of the outlet. By doing this, so that this lead wire will not overlap and be attached at the outlet 14,
Water is prevented from entering the terminal cover 5 through the gaps between the lead wires 12 and external tensile stress does not act on the connection portion of the lead wires 12 in the terminal cover 5.

[0017]

According to the protective device for electrical components of the present invention, the terminal cover attached to the outer wall of the compressor is provided with a lead-out portion for leading out a lead wire connected to the electrical component, and the guide portion guides the lead wire. And a U-shaped outlet provided at the tip of the guide, the side wall of the guide is widened toward the inside, and the upper wall is inclined so as to be lowered toward the outside. Therefore, it is possible to prevent the lead wires from overlapping at the outlet by allowing the lead wires to be drawn out in a substantially straight line by the guide from the connecting portion of the lead wire to be connected to the electrical component toward the outlet. Water can be prevented from entering the terminal cover through the gap.

Further, in the protection device for electrical equipment of the present invention, the terminal cover attached to the outer wall of the compressor via the gasket is provided with the lead-out portion for leading out the lead wire connected to the electrical equipment, and the lead wire is provided in the lead-out portion. Since the plurality of protruding pieces to be pressed against the gasket are provided substantially orthogonal to the lead-out direction of the lead wire, and these protruding pieces are arranged densely on the outer side and roughly on the inner side, By making it harder to move on the outside than on the inside, even if tensile stress acts on the lead wire from the outside of the terminal cover, tensile stress acts on the connection part of the lead wire connected to the electrical components in the terminal cover. This is something that can be prevented.

[Brief description of drawings]

FIG. 1 is a plan view showing a compressor according to an embodiment of the present invention with a protective device attached thereto.

FIG. 2 is a front view of relevant parts showing a state in which a protective device is also attached to the compressor.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view taken along line BB in FIG.

FIG. 5 is an enlarged sectional view of an essential part showing a state in which the lead wire of the present invention is fixed.

FIG. 6 is a perspective view in which a protection device is attached to a conventional compressor.

FIG. 7 is a sectional view of an essential part showing a state in which a protective device is also attached to the compressor.

8 is a sectional view taken along line CC of FIG. 1 ... Airtight container 3 ... Protective device 5 ... Terminal cover 7 ... Sealed terminal 8 ... Overload relay 11 ... Extraction part 12 ... Lead wire 13 ... Guide 14 ... Outlet port 15 ... Side wall 16 …… Top wall 17,18,19 …… Projecting piece

Claims (1)

[Claims] 1. A terminal cover accommodating electrical components,
In a protective device mounted on the outer wall of a compressor via a gasket, the terminal cover is provided with a lead-out portion for leading out a lead wire connected to an electrical component, and this lead-out portion includes a guide for guiding the lead wire and this guide. An electrical outlet characterized by a U-shaped outlet provided at the tip of the guide, and the guide has a side wall that widens inward and the upper wall slopes downward toward the outside. Parts protection device.