JPH03175169A - Supporting device for closed type motor-driven compressor - Google Patents

Abstract

PURPOSE:To extremely reduce the rasping noise at the time of start or stop of operation by screwedly fixing the respective resin seats inserted in the inside of a coil spring to lower and upper supports by means of bolts, and also by forming the head of each bolt in a spherical shape. CONSTITUTION:Motor-driven elements and compression elements are elastically supported in the vertical direction via a coil spring 8 installed between a lower support 4 and an upper support 6 of the compression element, and via an upper seat 13 and a lower seat 9, both of which are made of resin. When the operation of a motor-driven compressor is started, or when the smooth operation is stopped, the motor-driven elements and compression elements significantly vibrate by the force of inertia of rotation, however, in this case, since the con tact surface of the coil spring 8 being in contact with the upper seat 13 or the lower seat 9 are made to be resin-to-metal contact, rasping noise can be minimized. Further, since the heads of bolts 17 are formed in a spherical shape, even if they are brought into contact with each other, loosening is hardly caused.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hermetic electric compressor used in refrigerators, near container containers, etc.

Conventional technology In recent years, electric compressors have become much quieter, and during operation,
There is an increasing need to take into consideration the prevention of unpleasant noises from the time of startup (when starting operation) to the time of stopping (when stopping operation).

An example of a conventional electric compressor support device will be described below with reference to the drawings.

Figures 3 and 4 are shown in Japanese Patent Application Laid-Open No. 64-3086. Figure 3 is a cross-sectional structural diagram of a conventional electric compressor, and Figure 4 is a conventional electric compressor support and equipment. FIG. 2 is an enlarged sectional view of a main part of an electric compressor in one embodiment when it is stationary.

In FIGS. 3 and 4, 21 is a closed container, 22 is an electric element, and 23 is a compression element.
3 is attached to the closed container 21 by a method such as welding and is elastically supported by the upper support 26 of the compression element 23 via a lower support 24 and a coil spring 26 fitted in the lower support. . The lower support member 24 and the coil spring 26 are fixed by a method such as press fitting. The upper support member 26 and the coil spring 25 are fixed by a loose fit or a light press fit.

The operation of the electric compressor support device configured as above will be described below.

First, the electric element 22 and the compression element 23 are elastically supported via the coil spring 25 fitted in the lower support 24 and the upper support 2e at any time, such as when the electric compressor is stopped, running, or transported. This function maintains the elasticity of the electric element 22 and compression element 23, protects them from external vibrations, and reduces the transmission of vibrations and noise generated by the electric element 22 and compression element 23 during operation. Additionally, movements are regulated when starting, stopping, and stopping operations.

Problem to be Solved by the Invention However, with the above configuration, when the spring coil 26 shakes significantly when starting and stopping the electric compressor, the contact and repulsion of the upper support 26 and the coil spring 26 causes a harsh sound. We had the challenge of doing so.

In view of the above-mentioned problems, the present invention provides a resin seat between the upper support, the lower support, and the coil spring, so that the resin seat and the coil spring are free from metal-to-metal contact and are electrically compressed. To provide a support device for an electric compressor for constructing a quiet electric compressor that produces extremely little jarring noise when starting and stopping the machine.

Means for Solving the Problems In order to solve the above problems, the support device for a hermetic electric compressor of the present invention includes a lower support that is fixed in a hermetic container and supports an electric element and a compression element. , an upper support formed in part of the motorized element or the compression element;
It has a resin seat made of a substantially cylindrical coil spring, a seat part that receives an end face of the coil spring, and a nunavuba part that is inserted inside the coil spring,
The seat is screwed and fixed to the lower support and the upper support with bolts, and the heads of the bolts have a spherical shape.

Effects The present invention has the above-described configuration, and even when the coil spring shakes significantly when starting and stopping the electric compressor, by interposing the resin seat between the upper support, the lower support, and the coil spring, The harsh noise caused by metal contact is extremely reduced.

EXAMPLE Hereinafter, a support device for a hermetic electric compressor according to an example of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional structural diagram of a hermetic electric compressor according to an embodiment of the present invention, and FIG. 2 is a sectional view of a hermetic electric compressor according to an embodiment of the support device for a hermetic electric compressor of the present invention. FIG. 3 is an enlarged cross-sectional view of the main part when the vehicle is at rest.

1 and 2, 1 is a sealed container, 2 is an electric element, 3 is a compression element, 4 is a lower support attached to the sealed container 1 by a method such as welding, and 6 is the lower support. A screw hole provided in the tool 4; 6 is an upper support formed in a part of the compression element 3 or the electric element 2; 7 is a screw hole provided in the upper support 6; 8 is approximately a cylindrical coil spring; 9 is a resin lower seat fixed to the lower support 4; 10 is a hole provided in the lower seat 9; 11 is a seat for receiving the end surface of the coil spring 8; Reference numeral 12 has a nunaguba portion inserted inside the coil spring 8. 13 is an upper seat fixture fixed to the upper support e; 14 is a hole provided in the upper seat fixture 13; 15 is a seat surface portion for receiving the end face of the coil spring 8; and 16 is an inner side of the coil spring 8. It has a snug bar part that is inserted. 17 is the upper seat fixture 13 and the upper support fixture 6;
The bolt 18 is a spherical head provided on the bolt 17 for screwing and fixing the button, the lower seat 1o, and the lower support 4, respectively. The lower seat fixture 9 and the upper seat fixture 13
The coil spring 8 interposed between the lower seat 9 is press-fitted, and the upper seat 13 is fitted to elastically support the compression element 3 or the electric element 2.

The lower seat 9 and the lower support 4 are fixed by screwing and fixing the bolt 17 into the threaded hole 5 of the lower support 4 through the hole 1o of the lower seat 9. The seat 13 and the upper support 6 are fixed by screwing the bolt 17 through the hole 11 of the upper seat 13 into the threaded hole 7 of the upper support e.

The operation of the support device for a hermetic electric compressor constructed as described above will be described below with reference to FIGS. 1 and 2.

When the electric compressor is stationary, the electric element 2 and the compression element 3 are connected to the coil spring 8 and the upper seat installed between the lower support 4 attached to the closed container 1 and the upper support 6 of the compression element 3. It is elastically supported in the vertical direction via the tool 13 button and the lower seat 9. When the electric compressor starts operating (rotating) or when the electric compressor that has been smoothly operating (rotating) stops, the shimbling element 2 and the compression element 3 swing significantly due to the inertial force of rotation. At this time, upper seat fixture 1
The contact surfaces of the lower seat 9 and the coil spring 8 are resin-to-metal, and the harsh noise is minimized. Further, since the head 18 of the bolt 17 is spherical, the structure is such that even if the bolts 17 come into contact with each other, they are difficult to loosen.

As described above, according to this embodiment, by interposing the resin seat between the upper support, the lower support, and the coil spring, it is possible to provide a compressor with low noise when starting and stopping the electric compressor. be able to.

Effects of the Invention As described above, the present invention provides a lower support fixed in a closed container and supporting an electric element and a compression element, an upper support formed on a part of the electric element or the compression element,
It has a resin seat that includes a substantially cylindrical coil spring, a seat surface portion that receives an end surface of the coil spring, and a snub bar portion that is inserted inside the coil spring;
The seat is screwed and fixed to the lower support and the upper support with bolts, and the head of the bolt has a spherical shape, thereby eliminating metal contact between the upper support and the coil spring. So start the electric compressor,
The harsh noises that occur when the vehicle stops (coil spring popping sounds, metal contact sounds) can be extremely reduced.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional structural diagram of an electric compressor according to an embodiment of the present invention, and Fig. 2 is an enlarged view of the main parts of an electric compressor support device according to an embodiment of the present invention when the electric compressor is stationary. Cross section, 3rd
FIG. 4 is a cross-sectional structural diagram of a conventional electric compressor, and FIG. 4 is an enlarged view of essential parts of an embodiment of a conventional electric compressor support device when the electric compressor is stationary. 1...Airtight container, 2...Electric element, 3
... Compression element, 4 ... Lower support, 6
... Upper support, 8 ... Coil spring, 9 ... Seat, 11 ... Seat part,
12... Snubber part, 13... Seating tool,
16... Seat part, 1e... Snap pad part, 17... Bolt, 18... Head.

Claims (1)

[Claims] A lower support fixed in a sealed container and supporting the electric element and the compression element; an upper support formed on a part of the electric element or the compression element; a substantially cylindrical coil spring; The seat has a resin seat made of a seat for receiving an end surface and a snub bar inserted inside the coil spring, and the seat is screwed and fixed to the lower support and the upper support with bolts, respectively. In addition, the head of the bolt has a spherical shape.