JPS6018633Y2 - Hermetic electric compressor - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of a hermetic electric compressor having a structure in which the electric compression element main body is suspended within the hermetic envelope by a coil spring. It is an object of the present invention to provide a support device that allows easy installation of an electric compression element main body, is inexpensive, and is reliable.

An embodiment of this invention shown in FIGS. 1 to 4 will be described below.

Reference numeral 1 denotes a hermetic envelope, 2 an electric compression element main body which is installed within the hermetic envelope and consists of a compression part and a driving part, 3 a lubricating oil stored in the inner bottom of the hermetic envelope 1, and 4 a main body of the element. 2
A coil spring for suspending the element body 2, one end of which is used to suspend the element body 2.
It is screwed into place and fixed.

Reference numeral 5 denotes a receiver for the coil spring which is fixed to the inner peripheral wall of the hermetic envelope 1 by welding or the like, and is formed into a substantially Z-shaped cross section, one end of which serves as a fixing portion 51 to the hermetic envelope 1, and the other end. The support portion 52 is fitted between the spiral wires of the coil spring 4.

Reference numerals 53 and 54 indicate bent portions formed by bending both side edges of the supporting portion in different directions, and 55 indicates a protrusion formed at the center of the supporting portion 5, with the spring fitting side being the base portion 55a, and the spring fitting direction being the bent portion 55. It is cut and raised so that it gradually becomes higher than the support part surface along the downward direction in FIG. 4.

In addition, the rising part 56 in the middle of the spring holder 5 is
As shown in FIG. 3, it is formed in an arc shape to match the outer shape of the coil spring 4.

Further, the plate thickness of the support portion 52 of the spring receiver is equal to or slightly smaller than the pitch interval of the coil spring 4.

The end portion of the coil spring 4 inserted into the gap 6 between the sealing envelope 1 and the support portion 52 is formed in a straight line so as to be disposed parallel to and in close proximity to or in contact with the bent portion 54 .

In the above structure, when assembling, the spring receiver 5 is first fixed to the inner surface of the hermetic envelope 1, and one end of the coil spring 4 is screwed and fixed to the element main body 2.

Then, the element main body 2 is inserted into the sealing jacket 1, and the support part 52 of the spring receiver is inserted between the spiral wires at the ends of the coil spring 4 to suspend the element main body 2.

At this time, the plate thickness of the support portion 52 is the above-mentioned thickness, so that the coil spring is not significantly deformed and local fatigue can be reduced.

The lower part of the coil spring 4 easily passes over the protrusion 55 along its slope, and the spring receiver is pushed in until it comes into contact with the rising part 56 of the tool, and the lower part of the spring 4 is placed between the lower end of the protrusion 55 and the rising part 56. The vertical movement of the coil spring 4 is suppressed.

In addition, movement in the lateral direction is suppressed by the bent portions 53 and 54.

The tip of the coil spring 4 is linear and comes into contact with the bent piece 54 to stop the coil spring 4 from rotating.

As described above, the spring holder has one end edge located on the end side of the fitted coil spring of the flat plate part that holds the coil spring of the tool, and one end edge of the other end located on the end side of the fitted coil spring. The edge is bent toward the electric compression element main body side to form a bent piece, and the flat plate part is provided with a protrusion that suppresses the movement of the coil spring, so that it is possible to suppress the movement of the coil spring in the horizontal and vertical directions, and also to prevent activation. The pressure contact force between the coil spring and the bent piece due to the forced displacement of the insertion side end of the relatively large coil spring that occurs when the coil spring is stopped can also be reduced by the above configuration, and the service life can be improved.

Furthermore, the electric compression element can be easily assembled by simply fitting the coil spring into the spring receiver.

Since the spring receiver has a simple shape, press working is easy, and since the slanted protrusions are formed by cut and raised pieces, they can be formed at the same time by the above press working.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing the compressor of this invention, Fig. 2 is an enlarged plan view showing the main parts of this invention, Fig. 3 is an enlarged front view thereof, and Fig. 4 is an enlarged sectional view thereof. . In the figure, 1 is a sealing jacket, 2 is an electric compression element main body, 4 is a coil spring, 5 is a spring receiver, 51 is a fixed part, 52 is a support part, 53 and 54 are bent pieces, and 55 is a protrusion. .

Claims (3)

[Scope of utility model registration request] (1) By fitting the other end of the coil spring, one end of which is fixed to the electric compression element body, into a spring holder fixed to the inner surface of the hermetic envelope, the electric compression element body is suspended within the hermetic envelope. In the spring receiver, the spring holder includes a flat plate portion fixed to the inner surface of the outer cover, a rising portion continuous to the flat plate portion, a rising portion continuous to the rising portion facing the inner surface of the outer cover, and a screw thread of the coil spring. and a flat plate part that is fitted between the shaped wires and holds the coil spring, forming a substantially Z-shaped cross section, and one edge of the facing flat plate part located on the tip side of the fitted coil spring. On the side of the sealing envelope, one edge of the other side is bent toward the electric compression element main body side to form a bent piece for suppressing the free movement of the coil spring, and at the same time, the facing flat plate part is provided with a bent piece that protrudes toward the side of the sealing envelope. A hermetic electric compressor characterized by forming protrusions that suppress the free movement of a coil spring. (2) The hermetic electric compressor according to item 1 above, wherein the protrusion is formed in the shape of an inclined surface that gradually becomes higher along the direction in which the spring is inserted. (3) The hermetic electric compressor according to any one of the above items 1 and 2, wherein the protrusion is formed by a cut-and-raised piece whose base is on the spring insertion side.