JPH0443638Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a vibration isolating device for a compressor of an air conditioner.

BACKGROUND ART Conventionally, vibration isolators for compressors used in air conditioners have been of the type shown in FIGS. 5 and 6. 1 is the base of the air conditioner main body (not shown);
A fixing nut 2 is fixed to the base 1 from below by welding 3. Reference numeral 4 denotes a bolt, which is screwed into the fixing nut 2 from below, forming a threaded portion 6 with a smaller diameter than the upper seat portion 5, and above the seat portion 5, a washer 7 and a nut 8 are attached with the seat portion 5 abutting. It is tightened. Reference numeral 9 denotes a lower vibration isolating rubber provided around the bolt 4 above the base 1, a single spring 10 is placed above this, and an upper vibration isolating rubber 11 is further placed on top of this. Reference numeral 12 denotes a groove provided in the upper vibration isolating rubber 11, and a leg 13 of the compressor is inserted into this structure 12.
is inserted.

Figure 6 shows a state in which the bolt 4 is rotated and the spring 10 and the upper vibration isolating rubber 11 are pulled down together with the washer 7 and nut 8 to prevent the compressor from vibrating during transportation, and the leg 13 is fixed. ing.

Conventionally, during normal operation, as shown in FIG.
The spring 10 and the upper vibration isolating rubber 11 absorb vibrations during operation of the compressor to prevent the vibrations from being transmitted to other parts.

Also, during transportation, as shown in FIG. 5, in a free state, cracks occur in the piping (not shown) due to impact during transportation, so as shown in FIG. Anti-vibration rubber 9 and spring 10
Then, the upper vibration isolating rubber 11 was compressed to an allowable range, and the legs 13 of the compressor were fixed to cope with shock during transportation.

Problems to be Solved by the Invention In such a conventional configuration, when the manufacturing process is completed and the state shown in FIG. 5 is changed to the state shown in FIG. When the bolt 4 rotates, the washer 7
The nut 8 will also rotate at the same time, but as it moves downward, the lower part 7a of the washer 7 and the upper part 11a of the upper vibration isolating rubber 11 will start to come into contact, and this contact resistance will cause the bolt 4 to rotate and the washer to rotate. 7
The rotation of the nut 8 and the nut 8 cannot follow each other, and the nut 8 becomes loose. Furthermore, if the bolt 4 is rotated counterclockwise without noticing this loosening, the bolt 4 will descend to the dotted line position 4a as shown in FIG.
There is no problem during transportation in the fixed state shown in Fig. 6, but when the installation is completed at the installation site, if the bolt 4 is turned clockwise again to the free state shown in Fig. 5, the nut 8 and washer Since the contact portion 8a with the compressor 7 is loose, a gap occurs, and if the compressor is operated as it is, the vibration of the leg 13, that is, the compressor becomes large, and there is a problem that the vibration-proofing effect is lost.

This invention solves these problems,
The purpose is to prevent such loosening of nuts.

Means for Solving the Problem In order to solve this problem, the present invention has a bolt that is threadedly engaged with a fixing nut fixed to a base, a seat above the bolt, and a seat above the seat. A small diameter threaded portion and a D formed only on this small diameter threaded portion.
A washer having a D-shaped cut hole matching the D-shaped cut of the small diameter threaded portion is provided.

Function With this configuration, the bolt is pulled downward in preparation for transportation, and the washer with a D-shaped cut hole and the nut fixed to this washer can be
It will rotate regardless of the contact resistance of the anti-vibration rubber.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. 15 is a base provided below the main body of the air conditioner (not shown), and a fixing nut 17 fixed by welding 16 is inserted into the hole of this base 15.
has been inserted. Reference numeral 18 denotes a bolt that is screwed into the threaded portion 19 of the fixing nut 17 and has a seat portion 20 above and a small diameter threaded portion 21 above the seat portion 20. The small diameter screw portion 21 above the seat portion 20 has a D-shaped cut portion 22 cut in the longitudinal direction.
There is also a D-shaped cut hole 23 on the seat 20.
A washer 24 having a washer 24 is provided. 25 is a nut fixed on this washer 24, 26
is located inside the base 15 of the fixing nut 17,
A lower vibration isolating rubber made of an elastic body, 27 is a spring placed on this lower vibration isolating rubber, 28 is a spring placed on this spring 27, and an upper vibration isolating rubber made of an elastic body; 29 is a spring placed on this lower vibration isolating rubber; A leg 30 of the compressor is fitted into a groove 29 of a groove provided in the vibration isolating rubber 28. FIG. 2 is a diagram showing a state in which the legs 30 of the compressor are fixed during transportation.

In the above configuration, during normal operation or testing during the manufacturing process, the compressor leg 30 is operated in a free state as shown in FIG. That is, the bolt 18 that is threaded into the fixing nut 17 fixed to the base 15 is threaded from below. At the top, against the seat 20 is a washer 24 with a D-shaped cut hole 23, on which a nut 25 is located. The nut 25 is tightened with a tool onto a small diameter threaded portion having a D-shaped cut portion 22.
Therefore, the washer 24 is tightened to the seat portion 20, and the washer 24 and the nut 25 are fixed. In this state, the bolt 18 is firmly fixed in the vertical position, and the upper vibration isolating rubber 28 is firmly fixed in the vertical position.
A gap is created between the upper part 28a of the washer 24 and the lower part 24a of the washer 24, and the leg 30 of the compressor is supported by the lower vibration isolating rubber 26, the spring 27, and the upper vibration isolating rubber 28. Vibrations are absorbed by these vibration isolators.

Next, the legs 30 of the compressor are to be fixed in preparation for transportation, but at this time, as shown in Figure 2,
Rotate and tighten the bolt 18. During this rotation, the upper part 28a of the upper vibration isolating rubber 28 and the lower part 24a of the washer 24 come into contact immediately, but the washer 24 is fitted into the small diameter threaded part 21 having the D-shaped cut part 22. inserted into D
The washer 24 has a mold cut hole 23,
Forcibly rotates together with the bolt 18, and the upper part 28a
Even if the contact resistance between the lower part 24a and the lower part 24a is large, the bolt 18 moves to the lower position and lowers the lower vibration isolating rubber 24a.
6, the bolt 18 is lowered to the allowable compression range of the spring 27 and the upper vibration isolating rubber 28. That is, when the compression is lowered to the allowable range, the bolt 18 hardly rotates and the compressor leg 30 is fixed, and the washer 24 does not rotate due to the D-shaped cut hole 23 even while the bolt 18 is rotating. Nut 2 fixed to this washer 24
5 will not slacken either.

Next, after transporting the air conditioner in the state shown in Figure 2 and installing the air conditioner on-site, the vibration isolator is returned to the free state (Figure 1), but this time, the bolt 18 must be tightened to the right. With this clockwise rotation, the washer 24 having the D-shaped cut hole 23 and the nut 25 are rotated at the same time, and the bolt 18 moves upward, and the head of the bolt 18 touches the fixing nut 17. When it hits the bottom surface of the body, the state shown in FIG. 1 is reached. That is, the rotation of the bolt 18 and the washer 2 which continued the D-shaped cut hole 23
Since the rotation of 4 follows, the nut 25 returns to the operating state of the vibration isolator without loosening.

Effects of the invention As described above, the present invention has a bolt that is threadedly engaged with a fixing nut fixed to a base, a seat above the bolt, and a non-circular part formed only on the small diameter threaded part above the seat. , a washer having a non-circular hole that matches the non-circular portion of the small-diameter screw portion is provided, and the vibration isolator is compressed while the bolt is rotated up and down, and the legs are fixed and transported by this compression. The washer and nut will not loosen when the washer is tightened or in the free state during operation, and the vibration isolator will not loosen due to the compression of the vibration isolator. This has the effect of ensuring that the legs are fixed and the vibration isolator is free.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a vibration isolator for a compressor according to an embodiment of the present invention, Fig. 2 is a sectional view of a vibration isolator prepared for transporting the vibration isolator for the same compressor, and Fig. 3 is a sectional view of the vibration isolator for the same compressor. Fig. 4 is a plan view of the washer of the vibration isolator of the same compressor, Fig. 5 is a sectional view of the vibration isolator of the conventional compressor, and Fig. 6 is a plan view of the nut of the vibration isolator of the compressor. FIG. 2 is a cross-sectional view of the vibration isolator for the machine when the vibration isolator is transported. 15...Base, 17...Fixing nut, 18...
Bolt, 20...Seat part, 21...Small diameter threaded part, 2
2...D-shaped cut portion, 23...D-shaped cut hole, 2
4... Washer, 25... Nut, 26... Lower anti-vibration rubber, 27... Spring, 28... Upper anti-vibration rubber, 30... Legs of the compressor.

Claims (1)

[Scope of utility model registration request] A fixing nut 17 fixed by welding 16 or the like so as to penetrate the base 15, and a bolt 18 formed with a thread to be threaded into the threaded portion 19 of the fixing nut 17.
A lower anti-vibration rubber 26 is attached around the fixing nut 17, a coil-shaped spring 27 is placed on the lower anti-vibration rubber 26, and a leg 30 of the compressor is placed on the upper end of the spring 27. An upper vibration isolating rubber 28 is provided with a groove 29 into which the bolt 18 is inserted.
a small diameter threaded portion 21 having a
A washer 24 is fitted into the washer 24 and provided with a D-cut hole 23, and a small-diameter threaded portion 21 having the D-shaped cut portion 22 at the upper part of the washer 24 has the seat portion 20 and the washer 24 fixed by tightening. A vibration isolating device for a compressor, which is provided with a nut 25.