JPH0874752A - Scroll type compressor - Google Patents

Abstract

PURPOSE: To reduce the assembly error as well as to lower the cost, by reducing the processing numbers and the assembly process numbers of the right side cup form member, the left side cup form member, and a frame. CONSTITUTION: A sealed housing 4 is composed of two cup form members 49 and 43, An electric motor M, a subbearing 51, and the like are provided inside the one side cup form member 49, and a scroll type compressor mechanism C is provided inside the other side cup form member 43, while a frame 5 to install a main bearing 52 and the like is composed of separate parts independent from the two cup form members 49 and 43, and the frame 5 is provided at the connecting part of the two cup form members 49 and 43.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor.

[0002]

2. Description of the Related Art One example of a conventional scroll type compressor is shown in FIG.
Is shown in. In FIG. 3, reference numeral 4 denotes a closed housing, which includes a right cup-shaped member 41, a shell 42 fastened to the right cup-shaped member 41 with a bolt 55, and a left cup-shaped member 43 fastened with the shell 42 to the shell 42.

A sub-bearing 51 is arranged inside the right cup-shaped member 41, an electric motor M and a main bearing 52 are arranged inside the shell 42, and a scroll-type compression is arranged inside the left cup-shaped member 43. Mechanism C is provided.

The electric motor M and the compression mechanism C are interlockingly connected to each other via a rotary shaft 3, and the rotary shaft 3 is integrated with a right cup-shaped member 41 and a shell 42 via a sub bearing 51 and a main bearing 52. It is rotatably supported by.

The electric motor M comprises a rotor Ma and a stator Mb. The rotor Ma is fixed to the rotating shaft 3 and the stator Mb is fixed by being press-fitted into the shell 42.

The scroll compression mechanism C comprises a fixed scroll 1, an orbiting scroll 2, and a rotation preventing mechanism 6 such as an Oldham link for preventing rotation of the orbiting scroll 2.

The fixed scroll 1 includes an end plate 11 and a spiral wrap 12 provided upright on the inner surface of the end plate 11. The end plate 11 is fastened to a left cup-shaped member 43 by a bolt 57.

By closely contacting the outer peripheral surface of the end plate 11 and the inner peripheral surface of the left cup-shaped member 43, the inside of the closed housing 4 is partitioned, a discharge chamber 46 is formed on the left side of the end plate 11, and a suction chamber is formed on the right side. Chamber 47 is limited. Further, a discharge port 13 is formed in the center of the end plate 11, and the discharge port 13 is opened and closed by a discharge valve 17.

The orbiting scroll 2 is provided with an end plate 21 and a spiral wrap 22 erected on the inner surface of the end plate 21, and a drive bush 32 is orbited in a boss 23 erected on the outer surface of the end plate 21.
It is rotatably fitted through 34. An eccentric drive pin 31 eccentrically provided on the inner end of the rotary shaft 3 is slidably fitted in a slide groove 33 formed in the drive bush 32.

The fixed scroll 1 and the orbiting scroll 2 are eccentric to each other by the orbiting radius, and are meshed with each other by shifting the angle by 180 degrees and engaging with each other.
24 are formed.

By driving the electric motor M, the rotary shaft 3, the eccentric drive pin 31, the drive bush 32,
The orbiting scroll 2 is driven via the boss 23, and the orbiting scroll 2 revolves on a circular orbit having an orbiting radius of revolution while being prevented from rotating by the rotation preventing mechanism 6.

Then, the gas enters the low-pressure chamber 48 through the suction pipe 44, and this gas passes through the passage 5 provided on the outer periphery of the stator Mb.
8, the air is sucked into the closed space 24 through the gap between the stator Mb and the rotor Ma, the passage 54 provided in the frame 5 and the suction chamber 47. Then, as the volume of the closed space 24 decreases due to the orbiting movement of the orbiting scroll 2, the compressed space reaches the central portion while being compressed, and the discharge valve 17 is pushed open from the discharge port 13 and discharged into the discharge chamber 46, It flows out from here via the discharge pipe 45.

In addition to the main bearing 52, a thrust bearing 53 for supporting a thrust load acting on the orbiting scroll 2 and a rotation preventing mechanism 6 are attached to the frame 5 integral with the shell 42.

[0014]

In the conventional scroll compressor described above, the hermetic housing 4 is composed of three members, a right cup-shaped member 41, a shell 42, and a left cup-shaped member 43, and these three members are bolted together. Since they are integrated by fastening using 55 and 56, there is a problem that the man-hours for processing these three members and the fastening and assembling man-hours for the flange portion increase, resulting in higher cost and larger assembly error.

[0015]

SUMMARY OF THE INVENTION The present invention has been invented to solve the above problems, and the gist of the first invention is to provide a scroll type compression mechanism, an electric motor, In a scroll compressor having a rotating shaft, a main bearing for supporting the rotating shaft, a sub-bearing, etc., the hermetic housing is composed of two cup-shaped members, and the inside of one cup-shaped member The electric motor and sub-bearing are installed in
The scroll type compression mechanism is disposed inside the other cup-shaped member, and a frame for mounting the main bearing and the like is formed by a separate component independent of the two cup-shaped members. The scroll compressor is characterized in that it is arranged at a connecting portion of a cup-shaped member.

A gist of the second invention is that a scroll type compression mechanism, an electric motor, a rotary shaft, a main bearing for pivotally supporting the rotary shaft, a sub bearing and the like are provided in a hermetically sealed housing. In a mold compressor, the hermetic housing is composed of two cup-shaped members, the electric motor and the sub-bearings are arranged inside one cup-shaped member, and the scroll-type compression inside the other cup-shaped member. The frame for arranging the mechanism and for mounting the main bearing etc.
A scroll-type compressor is characterized in that it is sandwiched between the flange portions of individual cup-shaped members, and is fixed by co-tightening these flange portions with a common bolt.

The gist of the third aspect of the invention is that a scroll having a scroll type compression mechanism, an electric motor, a rotating shaft, a main bearing for pivotally supporting the rotating shaft, a sub bearing and the like arranged in a hermetically sealed housing. In a mold compressor, the hermetic housing is composed of two cup-shaped members, the electric motor and the sub-bearings are arranged inside one cup-shaped member, and the scroll-type compression inside the other cup-shaped member. A scroll compressor is characterized in that a frame for mounting the mechanism and for mounting the main bearing and the like is fixed to one end of the cup-shaped member by press fitting.

[0018]

In the present invention, since the above-mentioned structure is provided, the hermetically sealed housing is constructed by disposing the frame at the connecting portion of the one cup-shaped member and the other cup-shaped member and integrating them. You can

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A first embodiment of the invention is shown in FIG. In FIG. 1, reference numeral 4 denotes a closed housing, which is a right cup-shaped member 49 and a left cup-shaped member fastened thereto with bolts 56.
It consists of 43 and. A sub-bearing 51 and an electric motor M are arranged inside the right cup-shaped member 49, and a scroll type compression mechanism C is arranged inside the left cup-shaped member 43.

Reference numeral 5 denotes a frame which is a separate member independent of both cup-shaped members 43 and 49. The outer peripheral fitting surface 5a is engaged with the inner peripheral surface of the right cup-shaped member 49, and then the peripheral edge portion 5b is formed. Is sandwiched between the flange portion 49a of the right cup-shaped member 49 and the flange portion 43a of the left cup-shaped member 43 and fastened together with the flange portions 49a, 43a by a bolt 56 to be integrated.

A main bearing 52 is mounted in the center of the frame 5, a thrust bearing 53 is fixed to the outer peripheral edge of the frame 5, and a rotation preventing mechanism 6 is slidably supported. Other configurations and operations are similar to those of the conventional one shown in FIG. 3, and corresponding members are designated by the same reference numerals.

A second embodiment of the invention is shown in FIG. In FIG. 2, the frame 5 is fixed to the end portion of the right cup-shaped member 49 by shrink fitting the outer peripheral fitting surface 5a into the right cup-shaped member 49 and press-fitting it. The right cup-shaped member 49 and the left cup-shaped member 43 are fastened together with bolts 56. The other structure is similar to that of the first embodiment shown in FIG.

[0023]

According to the first aspect of the invention, since the frame is composed of a separate component independent of the two cup-shaped members and is arranged at the connecting portion of the two cup-shaped members, these processing and these Since it becomes easy to incorporate components such as an electric motor and a bearing inside, the cost of the scroll compressor can be reduced.

According to the second aspect of the invention, the frame is sandwiched between the flange portions of the two cup-shaped members, and the flange portions are integrally fastened together by a common bolt, so that they are integrated. There is only one flange portion and one bolt fastening portion. For this reason, not only the same effect as the first aspect of the invention can be obtained, but also the man-hours for processing the flange and the number of steps for assembling and assembling the flange are reduced as compared with the conventional one, so that the cost can be reduced and the assembly error can be reduced. can do.

In the third aspect of the invention, the frame is fixed to one end of the cup-shaped member by being press-fitted, so that the flange portion and the bolt fastening portion of the hermetic housing are provided at one place. Therefore, it is possible to obtain the same effect as that of the second invention and further reduce the cost.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a second embodiment of the present invention.

FIG. 3 is a vertical sectional view of a conventional scroll compressor.

[Explanation of symbols]

 C scroll type compression mechanism M electric motor 3 rotating shaft 4 hermetic housing 5 frame 43 left cup-shaped member 49 right cup-shaped member 51 sub-bearing 52 main bearing 56 bolt

Claims (3)

[Claims] 1. A scroll type compressor comprising a scroll type compression mechanism, an electric motor, a rotary shaft, a main bearing for axially supporting a rotary shaft, a sub bearing, etc. in the hermetically sealed housing. It is composed of two cup-shaped members, the electric motor and the sub-bearing are arranged inside one cup-shaped member, the scroll type compression mechanism is arranged inside the other cup-shaped member, and the main bearing is formed. A scroll compressor, characterized in that a frame for mounting the above-mentioned components is constituted by a separate component independent of the two cup-shaped members and is disposed at a connecting portion of the two cup-shaped members. 2. A scroll-type compressor in which a scroll-type compression mechanism, an electric motor, a rotary shaft, a main bearing for supporting a rotary shaft, a sub-bearing, and the like are provided in the hermetically sealed housing. It is composed of two cup-shaped members, the electric motor and the sub-bearing are arranged inside one cup-shaped member, the scroll type compression mechanism is arranged inside the other cup-shaped member, and the main bearing is formed. A scroll-type compressor characterized in that a frame for mounting etc. is sandwiched between the flange portions of the two cup-shaped members and fixed by co-tightening with a bolt common to both flange portions. 3. A scroll type compressor in which a scroll type compression mechanism, an electric motor, a rotating shaft, a main bearing for pivotally supporting a rotating shaft, a sub bearing, and the like are arranged in the sealed housing. It is composed of two cup-shaped members, the electric motor and the sub-bearing are arranged inside one cup-shaped member, the scroll type compression mechanism is arranged inside the other cup-shaped member, and the main bearing is formed. A scroll type compressor characterized in that a frame for mounting the etc. is fixed to one end of the one cup-shaped member by press fitting.