JP3356588B2 - Compressor terminal cover mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a terminal cover for covering a terminal portion on a case surface of a compressor, and more particularly to an improvement in a structure for mounting a terminal cover using stud bolts projecting from the case surface. .

[0002]

2. Description of the Related Art Conventionally, in a compressor used in a refrigerating cycle or the like, a terminal cover mounting structure for the compressor as shown in FIGS. 8 and 9 has been known. 8 and 9, a terminal 10 and an overload relay 11 are provided on the surface of the case 2 of the compressor. Also,
A terminal 10 and an overload relay 11 (terminal part 10,
Terminal cover 40 covering 11) is attached. Terminal 10 on case 2 and overload relay 1
1, a stud bolt 3 having a tip 3a formed with a threaded portion is provided so as to protrude therefrom. On the other hand, approximately at the center of the upper wall portion 41 of the terminal cover 40, the stud bolt 3
Is formed with a bolt hole 44 through which the tip 3a passes. A nut 4 is screwed into the tip 3a of the stud bolt 3 that penetrates the bolt hole 44 of the terminal cover 40. Then, the nut 4 comes into contact with a peripheral edge of an upper end portion of the bolt hole portion 44 of the terminal cover 40 to press and fix the terminal cover 40 against the surface of the case 2.

[0003]

The conventional terminal cover mounting structure for a compressor has the following problems.

[0004] That is, there is a possibility that moisture may enter the terminal cover interior 42 from the bolt hole 44 of the terminal cover 40 and adhere to the terminals 10 and 11.
As shown in (1), it is necessary to interpose a waterproof member 45 such as rubber packing between the nut 4 and the periphery of the upper end of the bolt hole 44 of the terminal cover 40. Further, the waterproof member 45 may be deteriorated due to aging, and the waterproof property of the bolt hole 44 may be reduced. Therefore, by securing the waterproofness of the terminal cover 40 without using such a waterproofing member 45, the number of parts is reduced, the cost of parts is reduced, and the assembling property is improved. It is an issue to secure the property.

When the terminal cover 40 is mounted on the surface of the case 2, the bolt holes 44 are formed in the terminal cover 4.
0, the bolt holes 44
It is not easy to align the tip 3a of the stud bolt 3 with the stud bolt 3 and pass the stud bolt 3 through the bolt hole 44. For this reason, the terminal cover 40 cannot be easily positioned with respect to the surface of the case 2 with reference to the stud bolt 3, and the assemblability when attaching the terminal cover 40 to the surface of the case 2 is not good.

The present invention has been made in view of such a point, and it is possible to prevent moisture from entering the inside of the terminal cover without using a waterproof member in a portion of the terminal cover corresponding to the stud bolt and the nut. It is another object of the present invention to provide a compressor terminal cover mounting structure which can prevent the terminal cover from being stuck to the case surface with reference to the stud bolt.

[0007]

According to the first aspect of the present invention,
A terminal portion provided on the case surface of the compressor, a terminal cover covering the terminal portion and attached to the case surface, and a stud bolt protruding from the case surface;
And a nut screwed into the tip of this stud bolt.
The terminal cover has a concave portion formed on an outer peripheral wall thereof for receiving the stud bolt, and the nut abuts on a peripheral edge of an upper end portion of the concave portion of the terminal cover to press and fix the terminal cover against the surface of the case. And a terminal cover mounting structure for the compressor.

According to a second aspect of the present invention, in the first aspect, the concave portion of the terminal cover has a width slightly larger than the diameter of the stud bolt.

[0009]

[0010]

According to the first aspect of the present invention, the terminal cover has a concave portion formed on the outer peripheral wall thereof for receiving the stud bolt, and the nut abuts on the peripheral edge of the upper end portion of the concave portion of the terminal cover so that the terminal cover is placed on the case surface. Since the terminal cover is pressed and fixed, there is no possibility that moisture may enter the terminal cover from the portion corresponding to the stud bolt and the nut of the terminal cover.

According to the second aspect of the present invention, in the first aspect of the present invention, the concave portion of the terminal cover has a width slightly larger than the diameter of the stud bolt. The terminal cover can be accurately and easily positioned with respect to the case surface with reference to the stud bolt simply by inserting the stud bolt into the concave portion of the cover.

[0012]

[0013]

Next, an embodiment of the present invention will be described with reference to the drawings.

First Embodiment FIGS. 1 to 3 show a first embodiment of the present invention.
In the first embodiment shown in FIGS. 1 to 3, the same components as those of the conventional example shown in FIGS. 8 and 9 will be denoted by the same reference numerals.

As shown in FIG. 1, a terminal 10 and an overload relay 11 are provided on the surface of a case 2 of the compressor. A packing 1 is provided on the surface of the case 2 of the compressor.
4, terminal 10 and overload relay 11
The terminal cover 1 that covers the (terminal portions 10, 11) is attached. A stud bolt 3 having a tip 3a formed with a thread is protruded between the terminal 10 and the overload relay 11 on the surface of the case 2.

On the other hand, as shown in FIGS. 1 to 3, a portion of the outer peripheral wall 6 of the terminal cover 1 corresponding to the stud bolt 3 extends from the lower end of the outer peripheral wall 6 to the upper end (upper wall surface 8). A recess 7 for receiving 3 is formed. Tip 3a of stud bolt 3 received in recess 7
Protrudes upward from the upper end (upper wall surface 8) of the concave portion 7, and a nut 4 is screwed into a tip 3a of the stud bolt 3. The bottom of the nut 4 abuts on the peripheral edge 9 of the upper end of the recess 7 of the terminal cover 1 to press and fix the terminal cover 1 against the surface of the case 2 (see FIG. 3).

Next, the operation of the present embodiment having such a configuration will be described.

According to the present embodiment, the terminal cover 1
Has a concave portion 7 formed on its outer peripheral wall 6 to receive the stud bolt 3, and the nut 4 abuts on the upper peripheral edge 9 of the concave portion 7 of the terminal cover 1 to press and fix the terminal cover 1 against the surface of the case 2. So terminal cover 1
There is no possibility that moisture will enter the terminal cover interior 12 from the portion corresponding to the stud bolt 3 and the nut 4.

The width of the recess 7 of the terminal cover 1 is preferably slightly wider than the diameter of the stud bolt 3. In this case, when the terminal cover 1 is mounted on the surface of the case 2, The terminal cover 1 can be accurately and easily positioned with respect to the surface of the case 2 based on the stud bolts 3 only by inserting the stud bolts 3 into the recesses 7.

Second Embodiment FIGS. 4 and 5 show a second embodiment of the present invention. In the second embodiment shown in FIGS. 4 and 5, FIG.
The same components as those of the first embodiment shown in FIG. 3 are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 4 and 5, a concave portion 27 for receiving the stud bolt 3 is formed in a portion corresponding to the stud bolt 3 on the outer peripheral wall 26 of the terminal cover 20. At the upper end of the concave portion 27, a plate-shaped nut receiving portion 23 having a bolt hole 24 through which the tip 3a of the stud bolt 3 passes is provided. The tip 3a of the stud bolt 3 penetrating through the bolt hole 24 is
Of the stud bolt 3 protrudes upward from the upper end (the upper wall surface 28 of the nut receiving portion 23).
Is screwed. The bottom of the nut 4 abuts on the upper peripheral edge 29 of the bolt hole 24 of the terminal cover 1 to press and fix the terminal cover 20 against the surface of the case 2.

Next, the operation of the present embodiment having such a configuration will be described.

According to this embodiment, the terminal cover 20
Has a concave portion 27 formed on the outer peripheral wall 26 for receiving the stud bolt 3, and a nut receiving portion 23 having a bolt hole 24 for passing the tip 3 a of the stud bolt 3 is provided at the upper end of the concave portion 27. Since the nut 4 abuts on the upper peripheral edge 29 of the bolt hole 24 of the terminal cover 20 and presses and fixes the terminal cover 20 against the surface of the case 2, the stud bolt 3 of the terminal cover 20 is fixed.
There is no possibility that moisture will enter the terminal cover interior 22 from the portion corresponding to the nut 4. Further, since the bolt hole 24 through which the tip 3a of the stud bolt 3 passes is formed in the nut receiving portion 23 provided at the upper end of the recess 27, the bolt hole 44 is formed as in the conventional example shown in FIG. Compared to the case formed on the upper wall 41 of the terminal cover 40, the stud bolt 3 is passed through the bolt hole 24 by aligning the tip 3a of the stud bolt 3 with the entrance of the bolt hole 24, and the stud bolt 3 is used as a reference. Positioning the terminal cover 40 with respect to the surface of the case 2 can be facilitated.

Third Embodiment FIGS. 6 and 7 show a third embodiment of the present invention. In the third embodiment shown in FIGS. 6 and 7, FIG.
The same components as those of the first embodiment shown in FIG. 3 are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 6 and 7, a portion of the outer peripheral wall 36 of the terminal cover 30 corresponding to the stud bolt 3 protrudes toward the inside 32 of the terminal cover and has a lower end to an upper end (upper wall surface). A thick portion 35 extending to 38) is formed. The stud bolt 3 extends through the thick portion 35 in the vertical direction inside the thick portion 35.
Is formed. Tip 3a of stud bolt 3 received in bolt hole 34
Protrudes upward from the upper end (upper wall surface 38) of the bolt hole portion 34, and a nut 4 is screwed into a tip 3a of the stud bolt 3. The bottom of the nut 4 abuts on the upper peripheral edge 39 of the bolt hole 34 of the terminal cover 30 to press and fix the terminal cover 30 against the surface of the case 2.

Next, the operation of the present embodiment having such a configuration will be described.

According to the present embodiment, the terminal cover 30
Has a bolt hole portion 34 formed in the thick portion 35 of the outer peripheral wall 36 to receive the stud bolt 3, and the nut 4 abuts on a peripheral edge 39 of an upper end portion of the bolt hole portion 34, and the terminal cover 30 is attached to the surface of the case 2. , The stud bolt 3 and the nut 4 of the terminal cover 30 are fixed.
There is no danger that moisture will enter the terminal cover 30 from the portion corresponding to. The bolt holes 34 for receiving the stud bolts 3 are formed on the outer peripheral wall 3 of the terminal cover 30.
6, the bolt hole 44 is formed in the terminal cover 40 as in the conventional example shown in FIG.
The stud bolt 3 is passed through the bolt hole 34 by aligning the tip 3a of the stud bolt 3 with the entrance (lower end) of the bolt hole 34 of the terminal cover 30 as compared with the case formed on the upper wall 41. It is possible to accurately and easily position the terminal cover 30 with respect to the surface of the case 2 with the bolt 3 as a reference.

[0028]

According to the first aspect of the present invention, the terminal cover has a recess formed on the outer peripheral wall thereof for receiving the stud bolt, and the nut abuts on the peripheral edge of the upper end portion of the recess of the terminal cover to hold the terminal cover. Since the terminal cover is pressed and fixed to the surface of the case, there is no possibility that moisture may enter the terminal cover from a portion corresponding to the stud bolt and the nut of the terminal cover. For this reason, it is not necessary to use a waterproofing member for preventing moisture from entering the portion corresponding to the stud bolt and the nut of the terminal cover, and it is possible to reduce the number of parts and to ensure reliable waterproofing over a long period of time. Can be maintained.

According to the second aspect of the present invention, when the terminal cover is mounted on the case surface, the concave portion of the terminal cover has a width slightly larger than the diameter of the stud bolt. The terminal cover can be accurately and easily positioned with respect to the case surface with reference to the stud bolt simply by inserting the stud bolt into the concave portion of the cover. For this reason, the assemblability when attaching the terminal cover to the case surface can be improved.

[0030]

[Brief description of the drawings]

FIG. 1 is an elevation view showing a first embodiment of a structure for mounting a terminal cover of a compressor according to the present invention.

FIG. 2 is an end view in the direction of the line II-II of the terminal cover mounting structure of the compressor shown in FIG.

3 is a cutaway perspective view showing a periphery of a nut of the terminal cover mounting structure of the compressor shown in FIG. 1;

FIG. 4 is an elevational view showing a second embodiment of the terminal cover mounting structure of the compressor according to the present invention.

FIG. 5 is an end view in the direction VV of the terminal cover mounting structure of the compressor shown in FIG. 4;

FIG. 6 is an elevational view showing a third embodiment of the compressor terminal cover mounting structure according to the present invention.

FIG. 7 is an end view in the direction VII-VII of the terminal cover mounting structure of the compressor shown in FIG. 6;

FIG. 8 is a longitudinal sectional view showing an example of a conventional terminal cover mounting structure of a compressor.

FIG. 9 is an end view in the IX-IX line direction of the conventional example shown in FIG. 8;

[Explanation of symbols]

 1,20,30,40 Terminal cover 2 Compressor case 3 Stud bolt 3a Tip 4 Nut 6,26,36,46 Outer wall 7,27 Concave 9 Upper peripheral edge of concave 10,11 Terminal 24,34,44 Bolt holes 29, 39 Periphery of upper end of bolt holes

Claims (2)

(57) [Claims] A terminal provided on a case surface of the compressor; a terminal cover covering the terminal and attached to the case surface; a stud bolt protruding from the case surface; Wherein the terminal cover has a concave portion formed on an outer peripheral wall thereof for receiving the stud bolt, and the nut abuts on a peripheral edge of an upper end portion of the concave portion of the terminal cover to form the terminal cover. And a terminal cover mounting structure for the compressor. 2. The structure according to claim 1, wherein the recess of the terminal cover has a width slightly larger than the diameter of the stud bolt.