JP6530279B2 - Support device for compressor - Google Patents

Description

  The present invention relates to a support device for a compressor used in a refrigerator or the like.

  Conventionally, in a refrigerator provided with a closed type compressor in which a compression unit for compressing a refrigerant and a motor for driving the compression unit are housed in a closed container, transmission of vibration of the compressor to the refrigerator main body etc. is suppressed Therefore, it is known to support a compressor using an elastic body such as anti-vibration rubber (for example, Patent Document 1 and Patent Document 2).

  FIG. 6 is a longitudinal sectional view showing a support structure of a compressor in the refrigerator disclosed in Patent Document 1. As shown in FIG. As shown in FIG. 6, in the refrigerator disclosed in the same document, a grommet mounting hole is formed in the compressor support portion 208 formed in the lower part of the compressor, and the grommet 204 elastically supports the compressor in the grommet mounting hole. Is attached.

  The grommet 204 is formed of a buffer material such as rubber, and has a through hole into which the sleeve 205 is inserted, and a constricted portion to which the compressor support portion 208 is attached to the outer diameter portion. Above the grommet 204, a washer 206 larger than the grommet mounting hole diameter of the compressor support portion 208 is provided, and the grommet 204 is fixed by screwing a bolt 207 inserted from above into the bolt insertion hole of the base frame 203. Be done.

  As another example of the prior art, Patent Document 2 discloses a configuration in which a bolt is fixed to a bottom plate and a nut and a washer are attached to the upper end of the bolt. That is, in the vibration-proof rubber of the same document, the radial movement is restricted by the bolt fixed to the bottom plate and penetrating the central hole of the rubber, and the axial movement is made by the nut and washer attached to the upper end of this bolt Limited

JP, 2014-181747, A (page 4-5, FIG. 2) JP, 2013-151996, A (page 7, FIG. 4)

  However, in the above-described prior art, during operation of the compressor, the bolt supporting the elastic body comes into contact with the washer through which the bolt is inserted due to the vibration of the compressor, and noise caused by the contact between the bolt and the washer There was a problem that it occurs.

  Further, in the prior art shown in FIG. 6, the head of the bolt 207 and the grommet 204 are brought into contact with each other via the washer 206, and the grommet 204 is axially clamped and fixed by the bolt 207. Therefore, there is a problem that the vibration of the compressor is easily transmitted to the base frame 203 (the refrigerator main body side) through the bolt 207.

  Further, as in the prior art disclosed in Patent Document 2, in the configuration in which the bolt is fixed to the bottom plate and the nut and the washer are attached to the upper end of the bolt, there is a problem that the number of production steps is large. That is, in order to attach the anti-vibration rubber, a process of fixing a bolt to the bottom plate and a process of tightening a nut on the bolt are required. Moreover, after fixing a volt | bolt to a baseplate by welding, caulking process etc., the process of repairing (touching up) the surface treatment layer etc. of the said fixing location vicinity is required. Therefore, it has been desired to reduce the number of production processes to improve productivity.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a supporting device of a compressor which exhibits excellent vibration damping effect with less generation of noise and is easy to attach. It is.

  The supporting device for a compressor according to the present invention is a supporting device for supporting the compressor from below on a base, and is mounted on a mounting hole formed in a mounting leg of the compressor and mounted on the base An elastic body, a washer attached to an upper portion of the elastic body protruding upward from the mounting hole, a through hole formed in the elastic body, and a support shaft inserted into the washer and erected on the base , And the elastic body is formed with a washer attachment portion fitted to the inner diameter portion of the washer, and the washer is fitted to the washer attachment portion.

  Further, in the support device of the compressor according to the present invention, a stopper portion whose radial dimension is formed larger than the inner diameter of the washer is provided on the upper portion of the support shaft projecting above the washer. The mounting portion is characterized by projecting upward from the upper surface of the washer.

  Further, in the support device for a compressor according to the present invention, the washer attachment portion is formed such that the radial dimension thereof is larger than the inner diameter of the washer.

  Further, in the support device of the compressor according to the present invention, the support shaft is a cylindrical main shaft portion, a head formed in the vicinity of an upper end portion of the main shaft portion to be the stopper portion, and a lower end portion of the main shaft portion And a screw portion formed in the vicinity and screwed into a fixing hole formed in the base.

  In the compressor supporting device of the present invention, the outer diameter of the main shaft portion is larger than the outer diameter of the screw portion, and the length of the main shaft portion is longer than the height dimension of the elastic body. Do.

  According to the support device of the compressor of the present invention, the elastic body for elastically supporting the compressor is formed with the washer attachment portion fitted to the inner diameter portion of the washer, and the washer is fitted to the washer attachment portion . Therefore, there is no direct contact between the inner diameter portion of the washer and the support shaft, and the generation of noise due to the contact between the washer and the support shaft can be suppressed.

  Further, according to the support device of the compressor of the present invention, the stopper portion whose radial dimension is formed larger than the inner diameter of the washer is provided on the upper portion of the support shaft projecting above the washer. And the washer prevent the elastic body from coming off. And since the washer attachment part with which a washer is fitted protrudes above the upper surface of a washer, a washer and a stopper part do not contact directly. As a result, generation of noise and transmission of vibration due to the contact between the upper surface of the washer and the stopper portion can be reduced.

  Further, according to the support device of the compressor of the present invention, the washer attachment portion of the elastic body may be formed so that the dimension in the radial direction is larger than the inner diameter of the washer. As a result, the washer attachment portion and the washer are fitted with an appropriate interference (tight fit), so the washer is held by the elastic restoring force of the elastic body, and the washer is prevented from being detached from the washer attachment portion Can.

  Further, according to the support device for a compressor of the present invention, as the support shaft, a cylindrical main shaft, a head formed in the vicinity of the upper end of the main shaft to be a stopper and a vicinity of the lower end of the main shaft A bolt having a formed thread portion may be used. This eliminates the need for a caulking process, welding process, etc. for fixing the support shaft to the base in advance, and also eliminates the need for processes such as touch-up after mounting such as attaching the support shaft to the base by caulking etc. Become.

  In addition, compared with the case where the compressor having the elastic body attached thereto is attached from the upper side to the support shaft previously fixed to the base, the assembling operation of the compressor is easy. That is, the compressor attached with the elastic body is placed on the base, and in this state, the position adjustment of the compressor is possible.

  Further, according to the support device of the compressor of the present invention, the outer diameter of the main shaft portion of the bolt as the support shaft may be formed larger than the outer diameter of the screw portion. Accordingly, since the lower end portion of the main shaft portion is abutted and fixed to the base at the time of bolt tightening, positioning in the height direction of the head serving as the stopper portion is facilitated.

  Further, the length of the main shaft portion of the bolt may be formed longer than the height dimension of the elastic body. As a result, the elastic body is not crushed excessively, the transmission of the vibration through the bolt as the support shaft can be suppressed, and a suitable anti-vibration effect can be obtained.

It is a side sectional view near machine room of a refrigerator which adopts a support device of a compressor concerning an embodiment of the present invention. It is a perspective view of the support device of the compressor concerning the embodiment of the present invention. It is a longitudinal section of the support device of the compressor concerning the embodiment of the present invention. It is a disassembled longitudinal cross-sectional view of the support device of the compressor concerning the embodiment of the present invention. It is a longitudinal cross-sectional view which shows the modification of the elastic body which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which shows the support structure of a prior art compressor.

  Hereinafter, a support device for a compressor according to an embodiment of the present invention will be described in detail based on the drawings.

  FIG. 1 is a side cross-sectional view of the vicinity of a machine room 35 of a refrigerator 30 employing the support device 1 according to the embodiment of the present invention. As shown in FIG. 1, the refrigerator 30 includes a heat insulation box 32 having a front opening, and a heat insulating door 33 which can close the opening, and stores food and the like inside the heat insulation box 32. A chamber 31 is formed. Storage room 31 may be divided into a plurality of storage rooms according to storage temperature and a use.

  The refrigerator 30 is provided with a vapor compression refrigeration cycle circuit as a cooling means. Specifically, the refrigeration cycle circuit includes a cooler 34 (evaporator) for cooling air circulating in the storage chamber 31, and a compressor 5 connected to the cooler 34 via a refrigerant pipe, And an expansion valve (capillary tube). In the refrigerator 30 according to the present embodiment, isobutane (R600a) is used as a refrigerant of the refrigeration cycle circuit.

  The compressor 5 sucks the low-temperature low-pressure vapor refrigerant evaporated in the cooler 34 and compresses it to a high-temperature high-pressure, and a compression unit for compressing the refrigerant and a motor for driving the compression unit It is a sealed compressor housed. As a format of the compressor 5, for example, a scroll type, a rotary type, and a reciprocating type can be adopted.

  On the lower back surface side in the housing of the refrigerator 30, a machine room 35 which is a space for arranging the compressor 5 and a radiator (not shown) is formed. The compressor 5 is elastically supported from below by the support device 1 and disposed on the base 8 (bottom plate) of the machine chamber 35.

  FIG. 2 is a perspective view of the support device 1. As shown in FIG. 2, the support device 1 includes an elastic body 2 that elastically supports the compressor 5 (see FIG. 1) from below, a washer 3 attached to an upper portion of the elastic body 2, an elastic body 2 and a washer 3. And a bolt 4 as a support shaft inserted into the

  The elastic body 2 is a so-called vibration-proof rubber formed of synthetic rubber or the like, and a compressor mounting surface 15 on which the compressor 5 is mounted, and a substantially concave groove-shaped compressor mounting for mounting the compressor 5 And supports the load of the compressor 5 and elastically deforms to absorb the vibration of the compressor 5.

  The bolt 4 is, for example, a hexagonal bolt made of steel or the like, and functions as a support shaft that displaceably supports the elastic body 2 and the compressor 5 mounted thereon. The washer 3 is, for example, a plate-like body such as a substantially circular or substantially polygonal shape in which a substantially circular through hole is formed at substantially the center and formed of a steel plate or the like. Suppress.

  FIG. 3 is a longitudinal sectional view of the support device 1. As shown in FIG. 3, the elastic body 2 has a substantially cylindrical cylindrical portion 10 disposed on the base 8 such that the central axis is substantially vertical. The cylindrical portion 10 is a main portion that elastically deforms in response to the load of the compressor 5 (see FIG. 1) to exhibit the anti-vibration function. The cylindrical portion 10 is formed to have a predetermined thickness so as to have a predetermined spring constant corresponding to the mass, the operating frequency, and the like of the compressor 5.

  The lower portion of the cylindrical portion 10, that is, the vicinity of the lower end surface 14 in contact with the upper surface of the base 8 of the refrigerator 30 (see FIG. 1) is thicker than the other portions. Thereby, the lower end surface 14 can be secured widely, the load of the compressor 5 can be dispersed and transmitted to the base 8, and the shape of the cylindrical portion 10 in the vicinity of the lower end surface 14 can be maintained to exert a suitable vibration damping effect. can do.

  The elastic body 2 has a substantially disc-shaped step 11 continuously formed inward from the upper end of the cylindrical portion 10. The upper surface of the step portion 11 is a compressor mounting surface 15 on which the compressor 5 is mounted. Specifically, the compressor mounting surface 15 abuts on the lower surface of the mounting leg 6 provided at the lower part of the compressor 5 and receives the load of the compressor 5. Then, the load is transmitted to the cylindrical portion 10 through the step portion 11 and supported by the base 8.

  A substantially cylindrical inner cylinder portion 12 continuously formed from the step portion 11 and substantially coaxial with the cylindrical portion 10 is formed substantially at the center of the step portion 11. A through hole 13 is formed substantially at the center of the inner cylindrical portion 12, and the bolt 4 is inserted through the through hole 13.

  The inner cylindrical portion 12 protrudes from the upper and lower surfaces of the step portion 11, and the inner cylindrical portion 12 of a portion protruding from the upper surface of the stepped portion 11 is formed in a substantially annular shape continuously from the compressor mounting surface 15. A substantially concave groove-shaped compressor mounting portion 17 is formed which opens in the outer peripheral direction.

  The compressor mounting portion 17 is fitted into a mounting hole 7 formed in the mounting leg 6 of the compressor 5. Thereby, the elastic body 2 is attached to the attachment hole 7 of the attachment leg 6. Here, since the compressor attachment portion 17 is formed in a substantially concave groove shape, the attachment leg 6 of the compressor 5 is held by the compressor attachment portion 17 and the elastic body 2 is attached to the attachment leg 6 of the compressor 5 Even if the compressor 5 is lifted in the state, the elastic body 2 does not fall off. Thereby, the assembly operation of the compressor 5 can be facilitated.

  A washer mounting surface 16 on which the washer 3 is mounted is formed on the upper surface of the inner cylindrical portion 12 of the elastic body 2 protruding upward from the mounting hole 7 of the mounting leg 6. Then, a substantially cylindrical washer attachment portion 18 continuously projecting upward from the vicinity of the edge portion of the through hole 13 at the center of the washer attachment surface 16 is formed on the elastic body 2 substantially coaxially with the through hole 13. Ru.

  The washer attachment portion 18 is fitted to the inner diameter portion of the washer 3. That is, the washer 3 is attached to the washer attachment surface 16 formed on the upper portion of the elastic body 2 and fitted in the washer attachment portion 18.

  Then, the bolt 4 is inserted from above into the through hole 13 and the washer 3 formed in the elastic body 2, and the bolt 4 is erected on the base 8. Specifically, the bolt 4 has a substantially cylindrical main shaft portion 20, a head portion 21 formed in the vicinity of the upper end portion of the main shaft portion 20 and serving as a stopper portion, and a screw portion 22 formed in the vicinity of the lower end portion of the main shaft portion 20. And the screw portion 22 of the bolt 4 is screwed into the fixing hole 9 formed in the base 8.

  Thus, by inserting the bolt 4 into the elastic body 2 and tightening it, the elastic body 2 and the compressor 5 can be displaceably supported with their displacement limited within a predetermined range. As described above, the elastic body 2 elastically supporting the compressor 5 is provided with the washer attachment portion 18 fitted to the inner diameter portion of the washer 3, and the washer 3 is fitted to the washer attachment portion 18 . Therefore, there is no direct contact between the inner diameter portion of the washer 3 and the bolt 4 inserted therein, and the generation of noise due to the contact between the washer 3 and the bolt 4 can be suppressed.

  Further, by adopting the bolt 4 as the support shaft, it is not necessary to fix the support shaft to the base 8 in advance as in the prior art, and there is no need for a caulking process, a welding process or the like. Further, since the support shaft is not attached to the base 8 by caulking or the like, a process such as touch-up after attaching the support shaft is not necessary.

  Further, since the support shaft is not fixed to the base 8 in advance, the assembling work of the compressor 5 to which the elastic body 2 is attached is easy. That is, the compressor 5 to which the elastic body 2 is attached can be placed on the base 8 and the position of the compressor 5 can be adjusted in this state.

  The above-mentioned fixing hole 9 formed in the base 8 is, for example, a screw hole or the like in which a screw is formed by tapping in a hole burred in the base 8 or the like. The fixing hole 9 may be configured by attaching a nut or the like to the through hole drilled in the base 8 by caulking or welding.

  FIG. 4 is an exploded longitudinal sectional view of the support device 1. As shown in FIG. 4, the head 21 of the bolt 4 is formed in a substantially hexagonal cross-sectional shape, and the radial dimension, that is, the diagonal length L2 of the substantially hexagonal shape is larger than the inner diameter D3 of the washer 3 It is formed. Thus, the head portion 21 functions as a stopper portion, and the head portion 21 of the bolt 4 fastened to the base 8 (see FIG. 3) and the washer 3 suppress the detachment of the elastic body 2.

  The outer diameter d4 (the length of the diagonal etc. in the case of a polygon) of the washer 3 is the inner diameter of the attachment hole 7 (see FIG. 2) of the attachment leg 6 (see FIG. 2) of the compressor 5 (see FIG. 1). It is desirable to be formed larger than. As a result, the mounting leg 6 of the compressor 5 can be prevented from coming off the elastic body 2.

  Further, the outer diameter d5 of the main shaft portion 20 of the bolt 4 is smaller than the inner diameter D1 of the through hole 13 formed in the elastic body 2. Thereby, as shown in FIG. 3, a clearance is secured between the main shaft portion 20 of the bolt 4 and the through hole 13. As a result, the vibration of the compressor 5 is suppressed from being transmitted to the base 8 via the bolt 4 by the bolt 4 coming into contact with the elastic body 2 and being pressed, and the preferable vibration-proof effect of the elastic body 2 Maintained.

  Referring to FIG. 4, the outer diameter d5 of the main shaft portion 20 of the bolt 4 is formed larger than the outer diameter d6 (peak diameter of the screw) of the screw portion 22. As a result, when the bolt 4 is tightened, as shown in FIG. 3, the lower end portion 20a of the main shaft portion 20 abuts the base 8 and is fixed, so positioning of the head 21 serving as a stopper portion in the height direction is easy. become.

  Further, referring to FIG. 4, the length L1 of the main shaft portion 20 of the bolt 4 is formed longer than the height h1 of the elastic body 2. Thereby, as shown in FIG. 3, in a state in which the bolt 4 is fastened, the main shaft portion 20 of the bolt 4 protrudes above the upper end portion of the elastic body 2 and the protruding main shaft portion 20 as a stopper portion The head 21 is located. That is, a predetermined gap is secured between the upper end of the elastic body 2 and the head 21 of the bolt 4.

  With such a configuration, the elastic body 2 is not crushed excessively by the tightening of the bolt 4, and the transmission of vibration via the bolt 4 as a support shaft can be suppressed. Therefore, the suitable vibration-proof effect by the elastic body 2 can be acquired.

  Referring to FIG. 4, the washer attachment portion 18 of the elastic body 2 is formed such that its radial dimension, that is, the outer diameter d 2 is larger than the inner diameter D 3 of the washer 3. As a result, the washer attachment portion 18 and the washer 3 are fitted with an appropriate interference (tight fit), so the washer 3 fitted to the washer attachment portion 18 is held by the elastic restoring force of the elastic body 2 . That is, securing the suitable interference can suppress the washer 3 from being detached from the washer attachment portion 18. A protrusion or the like partially projecting from the outer peripheral surface may be formed on the outer peripheral surface of the washer mounting portion 18 to secure the interference between the washer mounting portion 18 and the washer 3.

  The height h 2 at which the washer attachment portion 18 of the elastic body 2 protrudes upward from the washer attachment surface 16 is larger than the thickness t 1 of the washer 3. Thereby, as shown in FIG. 3, in a state in which the washer 3 is attached to the elastic body 2, the washer attachment portion 18 of the elastic body 2 to which the washer 3 is fitted protrudes above the upper surface of the washer 3 . Therefore, even if the elastic body 2 is deformed by the vibration from the compressor 5 or the like, the washer 3 and the head 21 of the bolt 4 as the stopper do not directly contact with each other. Generation of noise and transmission of vibration resulting from contact with the portion 21 can be reduced.

  The washer attachment portion 18 may be formed such that the outer diameter of the portion protruding upward from the upper surface of the washer 3 is larger than the outer diameter of the portion fitted to the washer 3 located in the lower portion. That is, the outer peripheral surface of the washer attaching portion 18 may be formed in a substantially concave shape opened in the outer peripheral direction so that the washer 3 is fitted. Thereby, the detachment of the washer 3 can be prevented more reliably.

  FIG. 5 is a longitudinal sectional view of an elastic body 102 as a modification of the elastic body 2. In addition, in FIG. 5, the same code | symbol is attached | subjected about the component which show | plays the effect | action and effect the same as that of the elastic body 2 already demonstrated, or an effect.

  As shown in FIG. 5, in the elastic body 102, in the vertical direction middle portion of the inner surface of the through hole 13, a concave portion 19 concaved in the outer diameter direction is formed. That is, the inner diameter D7 of the recess 19 is formed larger than the inner diameter D1 near the upper opening of the through hole 13 and near the lower opening.

  With such a configuration, the contact portion between the bolt 4 (see FIG. 2) and the elastic body 102 can be reduced, so that a suitable deformation of the elastic body 102 is allowed, and a suitable vibration damping effect by the elastic body 102 is obtained. Be Moreover, it can suppress that the vibration of the compressor 5 (refer FIG. 1) is transmitted to the base 8 (refer FIG. 2) via the volt | bolt 4. FIG.

  The present invention is not limited to the above embodiment. For example, although the above-mentioned embodiment explained an example which adopts bolt 4 as a support shaft, a support shaft may be a stud bolt, a pin, etc. which are beforehand fixed to base 8. In that case, the stopper portion may be a ring screwed to the support shaft, a ring attached by caulking, or the like. Even in such a configuration, by fitting the washer 3 to the washer mounting portion 18, it is possible to suppress the generation of noise due to the contact between the washer 3 and the support shaft. In addition, the present invention can be variously modified without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Support device 2 Elastic body 3 Washer 4 Bolt 5 Compressor 6 Mounting leg 7 Mounting hole 8 Base 9 Fixing hole 10 Cylindrical part 11 Step part 12 Inner cylindrical part 17 Compressor mounting part 18 Washer mounting part 20 Main spindle part 21 Head 22 Screw 30 Refrigerator 35 Machine room

Claims (5)

A support device for supporting a compressor from below on a base, comprising:
An elastic body mounted on a mounting hole formed in a mounting leg of the compressor and mounted on the base;
A washer attached to an upper portion of the elastic body protruding upward from the mounting hole;
A through hole formed in the elastic body, and a support shaft inserted into the washer and erected on the base;
A washer mounting portion is formed on the elastic body, the washer mounting portion being fitted to the inner diameter portion of the washer, and the washer is fitted to the washer mounting portion. A stopper having a radial dimension larger than an inner diameter of the washer is provided on an upper portion of the support shaft protruding above the washer.
The support device for a compressor according to claim 1, wherein the washer attachment portion protrudes above the upper surface of the washer.   The supporting device for a compressor according to claim 1 or 2, wherein the washer mounting portion is formed such that a radial dimension thereof is larger than an inner diameter of the washer.   The support shaft is a cylindrical main shaft portion, a head formed in the vicinity of the upper end portion of the main shaft portion to be the stopper portion, and a fixation formed in the lower end portion of the main shaft portion The support device for a compressor according to any one of claims 1 to 3, wherein the support device is a bolt having a screw portion screwed into the hole.   The compressor according to claim 4, wherein the outer diameter of the main shaft portion is larger than the outer diameter of the screw portion, and the length of the main shaft portion is longer than the height dimension of the elastic body. Support device.

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