JPH055484A - Scroll type compressor - Google Patents

Abstract

PURPOSE:To prevent a drive shaft from its lateral swinging and collapse by providing a housing 'or supporting a movable scroll and a motor and having upper/lower bearings of the drive shaft, and supporting upper/lower parts of the housing respectively to a barrel body of a casing, in a scroll type compressor for a refigerator. CONSTITUTION:A housing 5 comprising upper/lower part housings 5A, 5B is provided. A movable scroll 2 is turnably supported by the upper part housing 5A and also a cylindrical wall part 51, covering a receiving chamber 50 and a motor 4 in a crank pin part 30, is formed and supported to an inner side of a flange 71 of a barrel body 91 by a flange-shaped supporting part 55. On the other hand, a side wall part 52 and a bottom wall part 58 for surrounding a lower part space of the motor 4 are provided in the lower part housing 5B, and a contact part 57 is brought into contact with an inner side of the barrel body 91 to restrict a lower part. Further, upper/lower part bearings 31, 32 are respectively provided in the upper/lower part housings 5A, 5B to support a drive shaft 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll type compressor used as a refrigerant compressor or the like in a refrigerator.

[0002]

2. Description of the Related Art Conventionally, Japanese Unexamined Patent Publication No. 57-93601 has been disclosed.
As disclosed and shown in FIG.
Flanges J at the joint between top A and bottom B
Provided, movable scroll O and fixed scroll
F and the motor M and the upper part of the drive shaft S are supported.
By forming a housing H having a bearing portion R,
The support leg E is provided on the outer side of the guide H, and
And the housing H is supported by the flange J.
This allows the movable scroll O and the motor to be installed in advance when assembled.
Assemble M and the like integrally with the housing H
From the top of the casing D with the top A side open
Insert the support leg E onto the flange J and bolt
By fixing W, interior parts can be easily assembled.
I am trying to comply. In addition, L is a suction pipe, and its opening
Side part of the cover body C whose end is attached to the lower part of the housing H
, T is the discharge pipe, and V is the casing.
It is a bolt for.

[0003]

However, in the above, the housing H is held in the closed casing D only by the flange J, and the drive shaft S is provided only by the bearing R on the upper side of the motor M. Since the cantilever is supported in a cantilevered manner, and the lower side thereof is in a free state, the supporting rigidity of the rotating portion is low, and the drive shaft S is easily shaken or tilted, resulting in vibration or noise. There is.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a scroll type compressor which can simplify the assembling of the interior parts of the compressor and can prevent the shaft runout and the shaft tilt of the drive shaft.

[0005]

In the present invention, therefore, in order to achieve the above object, the fixed scroll 1 and the movable scroll 2 are provided in the upper portion of the closed casing 9, and the drive shaft 3 is connected to the lower portion thereof. In the scroll compressor having the motor 4 installed therein, a flange 71 for mounting a top 92 constituting the upper portion of the casing 9 is provided on the upper portion of a body 91 constituting the main body of the casing 9, and the movable scroll 2 and the motor are provided. Housing 5 including an upper bearing 31 and a lower bearing 32 that support the drive shaft 3 at both upper and lower positions of the motor 4.
And a support portion 55 for supporting the flange 71 is provided on the upper outer peripheral portion of the housing 5, while the lower outer peripheral portion of the housing 5 is in contact with the inner surface of the casing 9 and the lower portion of the housing 5 is formed. Abutment portion 57 for restraining the
Was established.

[0006]

When assembled, the movable scroll 2, the motor 4, etc. are held in the housing 5, and this is inserted from the upper side of the closed casing 9 with the top 92 open to support the support portion 55 on the flange 71. , The contact portion 57 to the body 91
It is possible to easily assemble the drive shaft 3 by bringing the drive shaft 3 into contact with the inner surface of the upper bearing 31 after the assembly is completed.
And the lower bearing 32, and the upper portion of the housing 5 is supported by the casing 9 through the support portion 55, and the lower portion of the housing 5 is supported by the casing portion 57 through the contact portion 57. Since it is constrained to, the support rigidity of the rotating portion can be increased, and shaft runout and shaft tilt of the drive shaft 3 can be prevented.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The scroll type compressor shown in FIGS.
On the upper part of the closed casing 9, a fixed scroll 1 in which a scroll body 12 and an outer peripheral wall 13 continuous with the scroll body 12 are integrally projected on a mirror plate 11, and a movable scroll 2 in which a scroll body 22 is integrally projected on a mirror plate 21 are opposed to each other. While combining and decorating in a shape,
The lower part includes a rotor 41 and a stator 42, and the rotor 4
1, a motor 4 in which the drive shaft 3 is connected via a key 43 and a fixing nut 44 is installed.

Then, an eccentric hole 30a is opened in a large-diameter crank pin portion 30 provided on the upper end of the drive shaft 3, and the eccentric hole 30a is provided on the lower surface of the second scroll 2 through a rolling bearing 30b. While fitting the boss portion 23, the movable scroll 2 is engaged with the Oldham ring 33 that constitutes a rotation preventing mechanism, and the movable scroll 2 is revolved with respect to the fixed scroll 1 by driving the motor 4, and the spiral outer peripheral portion is sucked. The suction gas taken in from the port 14 is compressed in the compression chamber 15 defined between the spirals, and the compressed gas is taken out from the discharge hole 16 at the center of the spiral through the discharge pipe 97 to the outside.

With the above construction, the casing 9 has a cylindrical pipe-shaped body 91 constituting the main body thereof, a dome-shaped lid body 92a constituting the upper part thereof, and a cylindrical body 92b integrated with the top. 92 and a bottom 93 which is a bottom portion and is composed of a thick base plate.
The upper flange 71 that attaches the top 92 to the upper part of
Further, lower flanges 72 are provided below the cylindrical body 92b of the top 92, and the upper mounting portions 7 are formed by these, and bolts 7a and nuts 7b are coupled at a plurality of positions on the circumference thereof to form a body 91 and a body 91. The top 92 is freely attached and detached, and the lower flange 81 is attached to the lower part of the body 91.
Further, the large diameter portion 82 is provided on the outer peripheral portion of the bottom 93, and the lower mounting portion 8 is configured by these, and the bolts 8a are coupled at a plurality of locations on the circumference thereof to form the body 91 and the bottom 9
3 and can be freely attached and detached. Sealing means 73 and 83 made of O-rings are provided at the contact portions of the mounting portions 7 and 8.

Further, the movable scroll 2 is rotatably supported, and the accommodating chamber 50 of the crank pin portion 30 and the motor 4 are provided.
An upper housing 5A having a cylindrical wall portion 51 for covering the lower housing 5B and a lower housing 5B having a side wall portion 52 surrounding the lower space of the motor 4 and a bottom wall portion 58, which are coupled to the lower portion of the lower wall through an inlay portion 52a and a bolt 52b The upper housing 65A is provided with an upper bearing 31 formed of a pair of rolling bearings 31a and 31b, and the lower housing 5B is formed with a lower bearing 32 formed of a metal bearing. 4 and a rotating portion such as the movable scroll 2 which is interlocked with the supporting member 4 are supported. The upper and lower bearings 31, 32 and the rotary sliding portion such as the crank pin portion 30 are attached to the lower end of the drive shaft 3 to provide an oil supply pump device 3.
Oil pick-up 35 from the bottom oil sump 90 via
The oil to be pumped is supplied into the oil supply holes 36 and 37 via the.

A flange-shaped support portion 55 for supporting the inside of an upper flange 71 provided on the body 91 is provided on the outer peripheral portion of the upper housing 5A, and a bolt is provided between the support portion 55 and the flange 71. Connect by 56.

Further, on the lower outer peripheral portion of the lower housing 5B,
An abutting portion 57 that is continuous with the outer peripheral portion of the bottom wall portion 58 and that contacts the inner surface of the body 91 and restrains the lower portion of the housing 5 is provided.

At the side portion of the lower housing 5B, a suction pipe 6 for fixing the base portion 6a of the body 91 to a mounting seat 91a with bolts 6b is connected, and an O-ring 60 is provided around the connection port 59. In addition, an annular filter 61 is interposed via a rib 53 in a cross section between the side wall portion 52 and the central bearing boss portion 54.

On the other hand, a suction opening 62 is opened in the upper portion of the cylindrical wall portion 51 of the upper housing 5A, and the fixed scroll 1 is attached to the upper end surface of the upper housing 5A via bolts 17. .. Further, an O-ring 18 defines a discharge chamber 94 in the upper part of the fixed scroll 1 and separates it from the inside of the casing 9, and an oil having a demister 95a for separating oil from the discharge gas and a holding body 95b is formed inside the discharge chamber 94. An oil drain pipe 50, which is interposed with a separator 95, causes the separated oil to merge with the oil drain from the oil return port 50a of the storage chamber 50 via the capillary tube 96, and is joined to the joint body 50b.
The oil is returned to the oil reservoir 90 via c.

With the above construction, when the compressor is assembled, the movable scroll 2 and the motor 4 are held in the housing 5, and the assembled product is installed from the upper side of the closed casing 9 with the top 92 open. The support portion 55 is supported by the flange 71, and the contact portion 57 is inserted into the body 91.
It can be easily assembled by contacting the inner surface of the. Moreover, at the time of use after the assembly is completed, the drive shaft 3 is supported on both sides by the upper bearing 31 and the lower bearing 32,
In addition, the upper portion of the housing 5 is supported by the casing 9 via the supporting portion 55, and the lower portion of the housing 5 is constrained by the casing 9 via the abutting portion 57, so that the supporting rigidity of the rotating portion is improved. Can be raised, drive shaft 3
It is possible to prevent shaft runout and shaft tilt.

[0016]

As described above, according to the present invention, the flange 71 for mounting the top 92 is provided on the upper portion of the body 91, and
A support portion that supports the movable scroll 2 and the motor 4 and that has an upper bearing 31 and a lower bearing 32 that both support the drive shaft 3 and that forms a housing 5, and that supports a flange 71 on the outer peripheral portion of the upper portion of the housing 5. 55, and abutment portions 57 for contacting the inner surface of the closed casing 9 and restraining the lower portion of the housing 5 are provided on the outer periphery of the lower portion of the housing 5, respectively. At times, the supporting rigidity of the rotating part can be increased, and the drive shaft 3
It is possible to prevent shaft runout and shaft tilt, and to prevent vibration and noise.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an upper side of a scroll compressor according to the present invention.

FIG. 2 is a sectional view of the lower side.

FIG. 3 is a cross-sectional view of a conventional scroll compressor.

[Explanation of symbols]

 1 Fixed Scroll 2 Movable Scroll 3 Drive Shaft 4 Motor 5 Housing 9 Sealed Casing 31 Upper Bearing 32 Lower Bearing 55 Supporting Part 57 Abutting Part 71 Flange 91 Body 92 Top

Claims (1)

Claim: What is claimed is: 1. A scroll compressor in which a fixed scroll 1 and a movable scroll 2 are installed in an upper part of a hermetic casing 9, and a motor 4 for connecting a drive shaft 3 is installed in a lower part of the scroll compressor. A flange 71 for mounting a top 92 constituting the upper portion of the casing 9 is provided on the upper portion of a body 91 constituting the main body portion of the casing 9, and supports the movable scroll 2 and the motor 4 and also the motor 4
Upper bearing 3 that supports the drive shaft 3 at both upper and lower positions
Forming a housing 5 comprising 1 and a lower bearing 32,
A support portion 55 for supporting the flange 71 is provided on the upper outer peripheral portion of the housing 5, while a contact portion for contacting the inner surface of the casing 9 and restraining the lower portion of the housing 5 is provided on the lower outer peripheral portion of the housing 5. A scroll compressor having a portion 57.