JPH03107582A - Supporting device of compressor - Google Patents

Abstract

PURPOSE:To prevent damage to and removal of parts, and to reduce high frequency noise by forming a ring groove on the center part of an lower retainer, and by fitting a cushioning material that abuts on a part ranging from a contact winding part of a coil spring lower end to a pitch winding part, to the ring groove. CONSTITUTION:A compressor main body 6 is flexibly supported by a supporting device as described below, in a contact case 2. The supporting device provides an upper retainer 8 formed on an arm of a frame body, a lower retainer 10 mounted on a fitting 9 that is fastened on an inner wall of the contact case 2, and a coil spring 13 into the upper and lower retainers 8, 10 of which upper and lower contact winding parts 11, 12 are inserted, respectively. In the center part of the lower retainer 10, a ring groove 15 is formed, to which a C-shaped ring cushioning material 16 is fitted. The cushioning material 16 is abutted on a part ranging from the contact winding part 12 of the lower end of the coil spring 13 to a pitch winding part.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a compressor support device used in refrigerators, showcases, etc., in which a compressor main body is elastically supported within a sealed case by a coil spring. .

(b) Prior art Conventionally, this type of compressor support device was developed in U.S. Pat.
As disclosed in Publication No. 7, etc., there is an upper retainer formed on the frame constituting the compressor main body, a lower retainer attached to a metal fitting fixed to the inner wall of the sealed case, and a large diameter retainer at the upper end. The coil springs each have a tightly wound portion with a JX diameter at the lower end and are inserted into both retainers, and when the small diameter tightly wound portion of the coil spring is press-fitted into the lower retainer, the size of the spring is The compressor main body is elastically supported within the sealed case by inserting the upper retainer into the radially tight winding portion.

By forming the lower end of the coil spring into a tightly wound portion with a small diameter, such a support device prevents the diameter of the sealed case from becoming too large and promotes the compressor's nozzle shape. By press-fitting the coiled portion into the lower retainer, the coil spring was prevented from coming off even when the compressor was being transported. Further, the tips of the upper and lower retainers collide with each other due to impact during transportation of the compressor, etc., and function as a stopper during pitching.

(C) Problems to be Solved by the Invention However, according to the above configuration, since the close winding portions are formed at the upper and lower ends of the coil spring, the pitch of the transition portion from the close winding portion to the pitch winding portion is the normal pitch. ′ of the winding part
It is designed to be thinner than the pitch. For this reason, when the load of the compressor body is applied to the coil spring, the pitch of the transition portion becomes smaller, and this transition portion, that is,
There is a problem in that the gap between the coil springs and the part where they are separated from the retainer is small, which causes high-frequency noise, so-called chatter noise, to occur when the compressor is operating.

The present invention has been developed in view of these points, and has a simple configuration that promotes downsizing of the compressor, prevents the large pitching of the compressor body and the detachment of the coil springs during transportation, and reduces high-frequency noise during operation. The aim is to reduce

(d) Means for Solving the Problems The present invention comprises an upper retainer provided on the compressor body, a lower retainer attached to the inner wall of the sealed case, and a small-diameter tightly wound portion at the lower end, which is inserted into both the retainers. The compressor main body is supported in a sealed case by a coil spring, and an annular groove is provided in the center of the lower retainer, and in this annular groove, the lower end of the coil spring moves from a close-wound portion to a pitch-wound portion. A cushioning material is inserted that comes into contact with the part.

(E) Function With the above-described configuration, the compressor support device of the present invention can keep the cushioning material in contact with the portion of the lower end of the coil spring where the /J\ diameter transitions from the close-wound portion to the pitch-wound portion, This cushioning material can reduce high-frequency noise by absorbing vibrations generated when the coil spring is separated, such as between the coil spring and the lower retainer or at the above-mentioned transition portion of the coil spring. In addition, since the cushioning material is inserted into the center of the lower retainer, the tightly wound part can be press-fitted into the lower part of the retainer to firmly fix the coil spring. Shaking can be suppressed by having the upper part of the upper retainer touch the upper retainer.

(f) Example Embodiments of the present invention will be described below based on the drawings.

Reference numeral 1 denotes a hermetic compressor in which a compressor main body 6 consisting of a compressor section 3, an electric motor section 4, and a frame 5 to which both the machine sections 3 and 4 are attached is housed in a closed case 2. The compressor main body 6
consists of an upper retainer 8 formed on the arm portion 7 of the frame body 5, a lower retainer 10 attached to a metal fitting 9 fixed to the inner wall of the sealed case 2, and a large-diameter tightly wound portion 11 on the upper end. The coil spring 13 has a small-diameter tightly wound portion 12 on each side, and the coil spring 13 is inserted into both the retainers 8 and 10, and the coil spring 13 is formed so that the pitches other than the tightly wound portions 11 and 12 are equal. The device is supported by a synthetic resin bushing 14 which is inserted into the tightly wound portion 11 of the spring and is interposed between the spring and the upper retainer 8. Reference numeral 15 denotes an annular groove formed in the center of the lower retainer 10, and a C-ring-shaped buffer material 16 made of synthetic resin or synthetic rubber is inserted into this annular groove. Here, the inner diameter of the buffer material is formed to be slightly larger than the outer diameter of the annular groove 15, so that it can be easily inserted into the lower retainer 10, and its own elastic force acting in the expansion direction allows the coil spring 13 to be It is formed to be pressed from the inside. This cushioning material 16 is attached to a portion of the lower end of the coil spring 13 where the tightly wound portion 12 transitions to the pitch wound portion, that is, a portion where the coil spring 13 comes into contact with a portion where the coil spring 13 is about to separate.

In the support device for the compressor configured in this way, the buffer material 16 is in contact with the lower end of the coil spring 13 at the portion transitioning from the tight winding portion 12 to the pitch winding portion. Vibration generated when the coil spring 13 is about to separate, such as between the coil spring 13 and the lower retainer 10, can be absorbed by the buffer material 16, and high frequency noise of the compressor can be reduced. Furthermore, since the cushioning material 16 is inserted into the center of the lower retainer 10, the lower part of the retainer can be left for press-fitting the tightly wound part 12, while the upper part of the lower retainer 10 hits the upper retainer 8 during a large pitching motion. This can prevent the coil spring 13 from coming off and damaging internal parts during transport of the compressor. It should be noted that the annular groove 15 formed in the lower retainer 10 is provided in the center part, which is not affected by external forces much.
Furthermore, since the depth may be shallow enough to allow insertion of the C-ring-shaped buffer material 16, there is no problem with the strength of the lower retainer 10.

(G) Effects of the Invention As described above, according to the present invention, it is possible to promote the /J\ type of compressor and prevent damage to internal parts and detachment of coil springs due to large pitching of the compressor body during transportation. , can reduce high-frequency noise during operation with a simple configuration.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a hermetic compressor showing an embodiment of the present invention, FIG. 2 is a sectional view of a support device, and FIG. 3 is an exploded sectional view of the support device. 2... Sealed case, 6... Compressor body, 8...
・Upper retainer, 10...Lower retainer, 1
1, 12...Tightly wound part, 13...Coil spring,
15... Annular groove, 6... Cushioning material.

Claims (1)

[Claims] (1) The compressor body is sealed tightly by an upper retainer provided on the compressor body, a lower retainer attached to the inner wall of the sealed case, and a coil spring having a small-diameter tightly wound portion at the lower end and inserted into both retainers. In those supported within the case,
A support device for a compressor, characterized in that an annular groove is provided in the center of the lower retainer, and a cushioning material is attached to the annular groove so as to come into contact with a portion of the lower end of the coil spring that transitions from the close-wound portion to the pitch-wound portion. .