JP2001323884A - Two-cylinder type rotary compressor, assembling jig and assembling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-cylinder type rotary compressor solving problems that a system and a method that a central partition plate and a crank shaft is not coaxially maintained are not established in the prior art necessary for coaxially maintaining a rotor and stationary element and that a reduction of motor efficiency and an electromagnetic noise are caused when a coaxial system of the rotor and the stationary element are deviated in a conventional two-cylinder type rotation compressor fixed to a close container by the central partition plate. SOLUTION: An outer diameter of a central partition plate 1 and a crank shaft 5 are adjusted to a coaxial system. A processing surface 1d parallel to a seat surface 1c at a main shaft-receiving side is provided on the outermost periphery of the central partition plate 1 and an outer diameter of the central partition plate 1 is processed so as to be perpendicular to the processing surface 1d. A core adjustment of the central partition plate 1 and the crank shaft 5 is carried out using the processing surface 1d of the outermost periphery of the central partition plate 1, the outer diameter part 1b and a part projected from a main. shaft receiver 3 of the crank shaft 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor, and more particularly to a structure, an assembling jig, and an assembling method of a two-cylinder rotary compressor.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a cross-sectional view of a conventional two-cylinder rotary compressor shown in Japanese Patent Application Publication. In the drawing, 1 is a central partition plate, 1a is an inner diameter portion of the central partition plate, 2a is an upper cylinder disposed above the central partition plate, 2b is a lower cylinder disposed below the central partition plate, 3 is an upper cylinder The main bearing 4 is disposed on the end face opposite to the central partition plate of the lower cylinder, the sub-bearing 4 is disposed on the end surface of the lower cylinder opposite to the central partition plate, and 5 is supported by the main bearing 3 and the sub-bearing 4. Crankshafts having two eccentric portions, 6a and 6b are rolling pistons fitted in respective eccentric portions of the crankshaft, and 7a and 7b are fitted in vane grooves of the upper and lower cylinders and reciprocate while abutting on the rolling pistons. A vane who exercises. The compression element 101 configured as described above and the rotor 8
The electric element 102 constituted by the stator 9 is housed in the closed container 10. The compression element 101 has a center partition plate fixed to a closed container by welding or the like, and the stator 9 of the electric element 102 is fixed to the closed container by shrink fitting or the like.

A rotor 8 which is one of the components of the electric element 102 is fixed to a crankshaft 5 which is a component of the compression element 101, and the crankshaft 5 is compressed by the main bearing 3 and the sub-bearing 4. Supported within. In addition, the compression element 101 fixes the outer diameter portion of the center partition plate 1 to a closed container. Further, the stator, which is the other of the electric elements 102, is fixed to the closed casing 10. That is, the positional relationship between the rotor 8 and the stator 9 is determined by the position where each of the center partition plate 1 and the stator 9 is fixed to the closed casing 10.

[0004] Normally, in the method of assembling the compression element 101 and the electric element 102 in the above-described configuration to the closed container, first, the rotor 8 is attached to the crankshaft 5. Next, rotor 8
And the stator 9 are aligned so as to be coaxial. Then, the airtight container 10 is covered, the stator 9 is attached to the airtight container 10 by means such as shrink fitting, and the center partition plate 1 which is the outermost peripheral portion of the compression element 101 is attached to the airtight container 10 by means such as welding.

[0005] Usually, the stator 8 shrink-fitted in the closed container 10 is machined so that the outer diameter and the inner diameter are coaxial with high precision. The outer diameter of the center partition plate 1 welded and fixed to the closed container 10 is slightly smaller than the inner diameter of the closed container 10, and the gap between the central partition plate 1 and the closed container 10 is such that spatter generated during welding does not enter. Has become. Also,
The airtight container 10 includes the shrink-fit portion of the stator 9 and the central partition plate 1.
Straightness is ensured between the welded portions.

[0006] From the above, the coaxial of the rotor 8 and the stator 9 is:
The misalignment of the outer diameter of the central partition plate 1 fixed in the closed casing 10 together with the crankshaft 5 on which the rotor is mounted and the stator 9 is greatly affected.

Next, the operation will be described. Electric element 10
The rotational force generated in 2 is transmitted to the crankshaft 5 and the crankshaft 5 rotates to perform compression work in the compression element 101.

[0008] The motor efficiency and the electromagnetic excitation force of the motor when performing the above-mentioned compression work are greatly affected by the center deviation between the rotation center of the rotor 8 of the electric element 102 and the center of the stator 9. The motor efficiency deteriorates, and the electromagnetic excitation force and the accompanying noise increase.

The sealing of the end surfaces of the rolling pistons 6a and 6b on the side of the center partition plate 1 is greatly affected by the overlap between the end surface of the rolling piston and the sheet surface of the center partition plate around the inner diameter of the center partition plate 1. When the amount is reduced, the sealing performance is deteriorated, and the performance of the compressor is reduced.

[0010]

If the center of rotation of the rotor 8 of the electric element and the center of the stator 9 are largely displaced from each other, there is a problem that the motor efficiency decreases and noise due to an increase in the electromagnetic excitation force increases. Was.

The coaxial alignment between the outer diameter of the center partition plate 1 and the crankshaft 5, which is necessary to secure the coaxiality between the rotor 8 and the stator 8, and the means for establishing the same are known in the prior art. It has not been.

When the center deviation between the inner diameter portion 1a of the center partition plate and the rotation center of the crankshaft 5 increases, the end surfaces of the rolling pistons 6a and 6b on the side of the center partition plate overlap with the sheet surface of the center partition plate 1. And the seal between the suction chamber or the compression chamber and the space on the inner diameter side of the central partition plate 1 is deteriorated in a portion where the overlap is small, and gas flows into or out of the suction chamber or the compression chamber, and There is a problem that performance is reduced.

The present invention has been made to solve the above-mentioned problems, and has means for preventing an increase in noise caused by an electromagnetic excitation force caused by a shift between the rotation center of the rotor 8 and the rotation center of the stator 9 of the electric element. And a two-cylinder rotary compressor.

The present invention also relates to an inner diameter portion 1 of a center partition plate.
and means for preventing performance degradation caused by a center shift between the rotation center of the crankshaft 5 and the rotation center of the crankshaft 5.

Another object of the present invention is to provide an assembling jig and an assembling method for a compressor for solving the above problems.

[0016]

A two-cylinder rotary compressor according to the present invention comprises a disk-shaped central partition plate having a hole in the center, an upper cylinder, a lower cylinder disposed above and below the central partition plate, and an upper cylinder. A main bearing provided on an end face opposite to the center partition plate of the lower cylinder, a sub bearing provided on an end face opposite to the center partition plate of the lower cylinder, and an eccentric portion in the upper and lower cylinders, a main bearing, a sub bearing. And a pair of rolling pistons fitted on the respective eccentric portions of the crankshaft on the inner diameter sides of the upper and lower cylinders, and the rolling pistons fitted on vane slots provided in the upper and lower cylinders. A compression element composed of a pair of vanes that reciprocate while abutting the outer peripheral portion,
An electric element configured of a stator and a rotor, and applying a rotational force to the crankshaft.The compression element and the electric element are housed in a closed container, and the compression element is welded to the central partition plate. In a two-cylinder rotary compressor fixed in the closed container by means such as
The outer diameter of the center partition plate and the crankshaft are coaxial.

Further, the outer diameter of the central partition plate is made coaxial with the inner diameter.

Further, the center partition plate has a ring-shaped processing surface which is the same as or parallel to the main bearing side seat surface, outside a portion in contact with the upper cylinder on the main bearing side end surface. The outer diameter of the central partition plate is perpendicular to the ring-shaped processing surface.

The main bearing is obtained by coaxially processing the inner diameter and the outer diameter of the boss.

Also, the assembly jig of the two-cylinder rotary compressor according to the present invention includes a large-diameter portion for housing a central partition plate, a medium-diameter portion for housing a bearing and a cylinder, and a bearing or a crankshaft. A small-diameter portion for accommodating the shaft rotatably is provided, and the outer diameter of the central partition plate and the crankshaft can be guided coaxially by rotation of the crankshaft.

A disk-shaped central partition plate having a hole in the center, an upper cylinder and a lower cylinder disposed above and below the disk, and a main bearing provided on an end surface of the upper cylinder opposite to the central partition plate; The sub-bearing provided on the end face opposite to the center partition plate of the lower cylinder, the eccentric part in the upper and lower cylinders, the main bearing, the crankshaft supported by the sub-bearing, and the inner diameter side of each of the upper and lower cylinders, Consisting of a pair of rolling pistons fitted in each eccentric part of the crankshaft, and a pair of vanes fitted in vane slots provided in upper and lower cylinders and reciprocating while abutting on the outer periphery of the rolling piston. Compression element to be
An electric jig, comprising a stator and a rotor, for applying a rotational force to the crankshaft, and an assembling jig for assembling a two-cylinder rotary compressor having an inner diameter slightly larger than the outer diameter of the central partition plate. A large-diameter portion having the bottom surface of the large-diameter portion machined at right angles to the large-diameter portion, a medium-diameter portion formed on the bottom surface of the large-diameter portion, and having an inner diameter smaller than the inner diameter of the large-diameter portion; A small-diameter portion which is coaxial with the portion and has an inner diameter slightly larger than the diameter of the main bearing portion of the crankshaft and smaller than the middle diameter portion.

A disk-shaped center partition plate having a hole in the center, an upper cylinder and a lower cylinder disposed above and below the center partition plate, and a main bearing provided on an end face of the upper cylinder opposite to the center partition plate; The sub-bearing provided on the end face opposite to the center partition plate of the lower cylinder, the eccentric part in the upper and lower cylinders, the main bearing, the crankshaft supported by the sub-bearing, and the inner diameter side of each of the upper and lower cylinders, Consisting of a pair of rolling pistons fitted in each eccentric part of the crankshaft, and a pair of vanes fitted in vane slots provided in upper and lower cylinders and reciprocating while abutting on the outer periphery of the rolling piston. Compression element to be
An assembly comprising a stator and a rotor, an electric element for applying a rotational force to the crankshaft, and assembling a two-cylinder rotary compressor in which the inner diameter and the outer diameter of the boss portion of the main bearing are coaxially processed. In the jig, a large-diameter portion having an inner diameter slightly larger than the outer diameter of the central partition plate, a bottom surface of the large-diameter portion machined at right angles to the large-diameter portion, and a middle diameter smaller than the inner diameter of the large-diameter portion. And a small-diameter portion coaxial with the large-diameter portion and having an inner diameter slightly larger than the outer diameter of the boss portion of the main bearing and smaller than the middle-diameter portion.

Also, the method for assembling a two-cylinder compressor according to the present invention provides an upper structure in which a main bearing and an upper cylinder are centered or eccentrically assembled, and a lower structure in which a sub-bearing and a lower cylinder are centered or eccentrically assembled. Body, a center partition plate, a pair of upper and lower rolling pistons, a pair of upper and lower vanes, a step of manufacturing a structure temporarily assembled with a crankshaft, and a step of setting the temporarily assembled structure with a jig, Fixing the upper structure, the lower structure, and the center partition so that the outer diameter of the center partition and the crankshaft are coaxial.

A first structure for manufacturing an upper structure by centering or eccentrically assembling a main bearing and an upper cylinder.
And manufacturing the lower structure by centering or eccentrically assembling the sub-bearing and the lower cylinder with high accuracy.
And a third step of manufacturing a structure in which the upper structure, the lower structure, the central partition plate, the pair of upper and lower rolling pistons, the pair of upper and lower vanes, and the crankshaft are temporarily assembled, and Using a jig in which the large-diameter portion, the middle-diameter portion, and the small-diameter portion are formed in a stepped shape, the outer diameter of the central partition plate is fitted into the large-diameter portion of the jig, and the main shaft of the central partition plate The receiving side end surface was brought into contact with the large diameter side end surface of the middle diameter portion end of the jig, and the portion of the crankshaft protruding from the main bearing was temporarily fitted by fitting into the inner diameter of the subtotal portion of the jig. The compression element is formed by a fourth step of setting the structure to a jig and a fifth step of fixing the upper structure, the lower structure, and the center partition plate by means such as bolting while rotating the crankshaft. Assemble

A first structure for manufacturing an upper structure by centering or eccentrically assembling a main bearing and an upper cylinder.
And manufacturing the lower structure by centering or eccentrically assembling the sub-bearing and the lower cylinder with high accuracy.
And a third step of manufacturing a structure in which the upper structure, the lower structure, the central partition plate, the pair of upper and lower rolling pistons, the pair of upper and lower vanes, and the crankshaft are temporarily assembled, and Using a jig in which the large-diameter portion, the middle-diameter portion, and the small-diameter portion are formed in a stepped shape, the outer diameter of the central partition plate is fitted into the large-diameter portion of the jig, and the main shaft of the central partition plate A structure in which the receiving end face is brought into contact with the large diameter end face of the middle diameter end of the jig, and the outer diameter of the boss portion of the main bearing is fitted into the inner diameter of the subtotal portion of the jig, thereby temporarily assembling the structure. The compression element is assembled from a fourth step of setting the jig to the jig and a fifth step of fixing the upper structure, the lower structure, and the center partition plate by means such as bolting while rotating the crankshaft. .

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a configuration of a two-cylinder rotary compressor according to Embodiment 1 of the present invention. In the drawing, 1 is a central partition plate, 2a is an upper cylinder disposed above the central partition plate, 2b is a lower cylinder disposed below the central partition plate, and 3 is an opposite side of the upper cylinder from the central partition plate. A main bearing 4 disposed on the end face; a sub-bearing 4 disposed on the end face opposite to the central partition plate of the lower cylinder; 5 a crankshaft supported by the main bearing 3 and the sub-bearing 4 and having two eccentric portions; Reference numerals 6a and 6b denote rolling pistons fitted in the respective eccentric portions of the crankshaft, and reference numerals 7a and 7b denote reciprocating vanes which are fitted in the vane grooves of the cylinder and abut on the rolling piston. A compression element 101 configured as described above;
Electric element 102 constituted by rotor 8 and stator 9
Is stored in the closed container 10.

Next, an assembling method will be described. Upper cylinder 2a and main bearing 3 and lower cylinder 2b and sub-bearing 4
Are assembled individually or concentrically. Thereafter, the rolling piston 6 (6a, 6b), the vane 7, the crankshaft 5, and the center partition plate 1 are assembled, and the outer diameter of the center partition plate 1 and the crankshaft 5 are fixed by bolts or the like so as to be concentric. 101 is formed.

Next, the rotor 8 is attached to a portion of the crankshaft 5 which is the rotation shaft of the compression element 101, protruding from the main bearing 3 by means such as shrink fitting. By doing so, the outer diameters of the rotor 8, one of the electric elements 102, the crankshaft 5, which is a component of the compression element 101, and the center partition plate 1 are concentric.

Thereafter, the rotor 8 and the stator 9 are held by a jig or the like so as to be concentric, and the closed container 10 is attached. At this time, since the stator 9 is attached to the closed container 10 by shrink fitting, the coaxial relationship between the closed container 10 and the stator 9 is ensured. Further, the outer diameter portion of the center partition plate 1 is attached to the closed container 10 by welding or the like while the concentricity of the rotor 8 and the stator 9 is maintained.

At this time, the gap between the outer diameter of the center partition plate 1 and the sealed container 10 is an amount necessary to make the stator 8 and the rotor 9 coaxial, ie, the outer diameter of the center partition plate 1. Rotor 8
Must be equal to or greater than the amount corresponding to the center deviation of In addition, it is necessary to prevent spatter having a large particle size generated during welding from entering the closed container.
Is smaller than the particle size of the sputter to prevent intrusion. That is, unless the outer diameter of the center partition plate 1 and the center deviation amount of the rotor 8 are not less than the particle diameter of the spatter to prevent intrusion into the closed container 10, the rotor 8 may have a smaller diameter.
And the stator 9 cannot be secured concentrically.

Since the outer diameter of the central partition plate 1 and the rotor 8 are kept concentric as described above, the gap between the outer diameter of the central partition plate 1 and the closed container 10 is limited to the space between the spatter and the closed container 10. Even if the gap is small enough to prevent intrusion, the coaxiality between the rotor and the stator can be ensured.

Next, the operation will be described. Electric element 10
The rotational force generated in 2 is transmitted to the crankshaft 5 and the crankshaft 5 rotates to perform compression work in the compression element 101.

At this time, if the center deviation between the rotor 8 and the stator 9 constituting the electric element 102 is large, problems such as a decrease in motor efficiency and an increase in electromagnetic noise may occur.
As described above, since the rotor 8 and the stator 9 are coaxial, the above problem can be avoided.

Embodiment 2 In FIG. 1, the dimensions a1 and a2 correspond to the end face of the central partition plate 1 and the rolling piston 6.
The dimensions of the overlapping portions of a and 6b are shown. The center partition plate 1 has a configuration as shown in FIG.
a and the outer diameter portion 1b are processed so as to be coaxial. Reference numeral 1c denotes a main bearing side seat surface, and 1d denotes a ring-shaped processed surface. Other configurations are the same as those of the first embodiment.

The outer diameter of the center partition plate 1 and the crankshaft 5 are coaxial as described in the first embodiment. Further, in the present embodiment, the inner diameter portion 1a and the outer diameter portion 1 of the central partition plate 1 are provided.
Since b is coaxially processed, the inner diameter portion 1b of the center partition plate 1 and the crankshaft 5 are kept coaxial. This allows
The overlapping portions a1, a2 of the rolling pistons 6a, 6b fitted in the respective eccentric portions of the crankshaft 5 and the end surfaces of the center partition plate 1 are uniform over the entire circumference, and a portion with a small partial overlap occurs. Therefore, gas leakage from the gap between the rolling pistons 6a and 6b and the center partition plate 1 is minimized, and variations between solids can be suppressed.

Embodiment 3 FIG. In the first embodiment, as shown in FIG. 2, the center partition plate 1 has a ring-shaped portion 1d which is brought into contact with the outer peripheral side of the main bearing side end surface with an assembly jig flush with or parallel to the main bearing side seat surface 1c. Has,
As an assembly jig, a large diameter portion 12a as shown in FIG.
A cylindrical jig having a middle diameter portion 12b and a small diameter portion 12c. The inner diameter of the large diameter portion 12a is substantially equal to the outer diameter 1b of the center partition plate 1 and larger than the outer diameter 1b of the center partition plate 1. The end surface 12d of the large diameter portion of the portion 12b is formed at right angles to the inner diameter of the large diameter portion 12a, and the inner diameter of the small diameter portion 12c is concentric with the large diameter portion 12a and substantially equal to the outer diameter of the crankshaft 5 on the main bearing side. A crankshaft having a diameter larger than the outer diameter of the crankshaft 5 on the main bearing side is prepared.

Next, a method of assembling the compression element will be described with reference to FIG.
This will be described with reference to FIG. A first step (a) of assembling the main bearing 3 and the upper cylinder 2a concentrically or slightly eccentric to produce an upper structure, and assembling the sub-bearing 4 and the lower cylinder 2b concentrically or slightly eccentric to form a lower structure The two structures produced in the second step (b) and the first and second steps are arranged at both ends of the central partition plate 1, and the crankshaft 5, rolling pistons 6a and 6b, vanes 7a and 7b Third step (c) of temporarily assembling by incorporating
The outer diameter portion 1b of the center partition plate 1 is a large diameter portion 1b of the assembly jig 12.
2a, a portion protruding from the main bearing 3 of the crankshaft 5 to the side opposite to the cylinder, with the ring-shaped surface 1d of the outer peripheral portion of the central partition plate 1 abutting against the end surface 12d of the middle diameter portion of the assembly jig 12. A fourth step (d) for mounting the crankshaft 5 so as to fit into the small diameter portion 12c of the assembly jig 12;
The compression element is assembled in a fifth step (e) of fixing the upper structure, the lower structure, and the center partition plate 1 by bolting or the like while rotating.

In the compression element 101 assembled in this manner, the outer diameter portion 1b of the center partition plate 1 and the crankshaft 5 are coaxial.

Embodiment 4 In the first embodiment, the center partition plate 1 is formed by coaxially processing the inner diameter 1a and the outer diameter 1b and making the outer peripheral side of the main bearing side end face contact with an assembly jig flush with or parallel to the main bearing side seat surface 1c. The outer diameter of the boss portion of the main bearing 3 is coaxially processed with the inner diameter of the main bearing 3 to form a large diameter portion 12a, a medium diameter portion 12b, and a small diameter portion as shown in FIG. The inner diameter of the large-diameter portion 12a is substantially equal to the outer diameter 1b of the central partition plate 1 and the outer diameter 1b of the central partition plate 1 in the cylindrical jig 12 having 12c.
The diameter is larger, and the end surface 12 on the large diameter portion side of the middle diameter portion 12b is
d is processed at right angles to the inner diameter of the large diameter portion 12a,
The inner diameter of the main bearing 3 is prepared to be concentric with the large diameter portion 12a, substantially equal to the outer diameter of the boss of the main bearing 3, and larger than the outer diameter of the boss of the main bearing 3.

Next, a method of assembling the compression element will be described. The first to third steps and the fifth step are the same as in the third embodiment. In the fourth step (d), FIG.
As shown in the figure, the outer diameter portion 1b of the center partition plate 1 fits the structure temporarily assembled in the assembly jig 12 into the inner diameter of the large diameter portion 12a of the assembly jig, and a ring-shaped outer peripheral portion of the center partition plate 1 is formed. The surface 1d is brought into contact with the end face 12d of the middle diameter portion of the assembling jig, and the outer diameter 3a of the boss portion of the main bearing 3 is attached so as to fit into the small diameter portion 12c of the assembling jig.

In the assembled compression element 101, the outer diameter 1b of the center partition plate 1 and the outer diameter of the boss of the main bearing 3 are kept coaxial. Since the inner and outer diameters of the boss portion of the main bearing 3 are coaxial, the crankshaft 5 supported by the main bearing 3 is coaxial with the outer diameter portion 1b of the center partition plate 1.

[0042]

As described above, according to the present invention, since the outer diameter portion of the center partition plate and the crankshaft are assembled so as to be coaxial, when the stator and the rotor are assembled in the closed container, the center partition is used. Even if the gap between the plate and the inner diameter of the closed vessel is small, the coaxiality of the stator and rotor can be secured,
There is an effect that reduction in motor efficiency and generation of electromagnetic noise due to coaxial misalignment between the stator and the rotor can be suppressed.

Further, since the outer diameter and the inner diameter of the central partition plate are coaxial, the outer diameter of the central partition plate and the coaxial axis of the crankshaft are provided so that the inner diameter of the central partition plate and the coaxial axis of the crankshaft are simultaneously secured. The overlap between the center hole of the center partition plate and the center partition plate on the side of the center partition plate end face of the rolling piston fitted into the eccentric portion of the crankshaft is:
The direction becomes uniform over the entire circumference, so that gas leakage from the end face of the rolling piston can be reduced, and there is an effect that performance degradation can be prevented.

Further, a ring-shaped processing portion which is the same as or parallel to the main bearing side seat surface is provided outside the portion of the center partition plate which comes into contact with the upper cylinder on the main bearing side end surface, Since the outer diameter of the center partition plate is perpendicular to the ring-shaped processed portion, there is an effect that a portion serving as a reference on the compression element side can be secured when the crankshaft and the center partition plate outer diameter are coaxially assembled. .

In addition, since the inner and outer diameters of the main bearing boss are coaxially machined, the outer diameter of the crankshaft and the main bearing boss can be reduced even when the length of the protruding portion of the crankshaft from the main bearing is short. The coaxial shape has an effect that a portion that can substitute for the center of the crankshaft can be secured.

A large-diameter portion for accommodating the central partition plate;
A middle diameter portion for housing a bearing and a cylinder, and a small diameter portion for housing a bearing or a crankshaft so that the crankshaft can rotate. The rotation of the crankshaft causes the outer diameter of the central partition plate and the crankshaft to be coaxial. Since this leads to the state, setting the jig on this jig has the effect that the outer diameter of the center partition plate and the crankshaft can be made coaxial.

Also, a disk-shaped center partition plate having a hole in the center, upper and lower cylinders disposed above and below the center partition plate, and a main bearing provided on an end surface of the upper cylinder opposite to the center partition plate, The sub-bearing provided on the end face opposite to the center partition plate of the lower cylinder, the eccentric part in the upper and lower cylinders, the main bearing, the crankshaft supported by the sub-bearing, and the inner diameter side of each of the upper and lower cylinders, Consisting of a pair of rolling pistons fitted in each eccentric part of the crankshaft, and a pair of vanes fitted in vane slots provided in upper and lower cylinders and reciprocating while abutting on the outer periphery of the rolling piston. Compression element to be
An electric jig, comprising a stator and a rotor, for applying a rotational force to the crankshaft, and an assembling jig for assembling a two-cylinder rotary compressor having an inner diameter slightly larger than the outer diameter of the central partition plate. A large-diameter portion having the bottom surface of the large-diameter portion machined at right angles to the large-diameter portion, a medium-diameter portion formed on the bottom surface of the large-diameter portion, and having an inner diameter smaller than the inner diameter of the large-diameter portion; The assembly jig provided with a small-diameter portion having an inner diameter slightly larger than the diameter of the main bearing portion of the crankshaft coaxially with the portion and having an inner diameter smaller than the middle diameter portion was used. This has the effect that the outer diameter and the crankshaft can be made coaxial.

Also, a disk-shaped central partition plate having a hole in the center, an upper cylinder and a lower cylinder disposed above and below the central partition plate, and a main bearing provided on an end surface of the upper cylinder opposite to the central partition plate, The sub-bearing provided on the end face opposite to the center partition plate of the lower cylinder, the eccentric part in the upper and lower cylinders, the main bearing, the crankshaft supported by the sub-bearing, and the inner diameter side of each of the upper and lower cylinders, Consisting of a pair of rolling pistons fitted in each eccentric part of the crankshaft, and a pair of vanes fitted in vane slots provided in upper and lower cylinders and reciprocating while abutting on the outer periphery of the rolling piston. Compression element to be
An assembly comprising a stator and a rotor, an electric element for applying a rotational force to the crankshaft, and assembling a two-cylinder rotary compressor in which the inner diameter and the outer diameter of the boss portion of the main bearing are coaxially processed. In the jig, a large-diameter portion having an inner diameter slightly larger than the outer diameter of the central partition plate, a bottom surface of the large-diameter portion machined at right angles to the large-diameter portion, and a middle diameter smaller than the inner diameter of the large-diameter portion. And an assembly jig having a small-diameter portion coaxial with the large-diameter portion and having an inner diameter slightly larger than the outer diameter of the boss portion of the main bearing and smaller than the middle-diameter portion. There is an effect that the outer diameter of the center partition plate and the crankshaft can be made coaxial.

An upper structure in which the main bearing and the upper cylinder are centered or eccentrically assembled, a lower structure in which the sub-bearing and the lower cylinder are centered or eccentrically assembled, a center partition plate, and a pair of upper and lower rolling pistons A step of manufacturing a structure in which a pair of upper and lower vanes and a crankshaft are temporarily assembled; a step of setting the jig in the temporarily assembled structure; and an outer diameter of the central partition plate and the crankshaft are coaxial. Fixing the upper structure, the lower structure, and the center partition so that the three components of the upper structure, the center partition, and the lower structure can be coaxially output at the same time. There is.

The first structure for manufacturing the upper structure by centering or eccentrically assembling the main bearing and the upper cylinder.
And manufacturing the lower structure by centering or eccentrically assembling the sub-bearing and the lower cylinder with high accuracy.
And a third step of manufacturing a structure in which the upper structure, the lower structure, the central partition plate, the pair of upper and lower rolling pistons, the pair of upper and lower vanes, and the crankshaft are temporarily assembled, and Using a jig in which the large-diameter portion, the middle-diameter portion, and the small-diameter portion are formed in a stepped shape, the outer diameter of the central partition plate is fitted into the large-diameter portion of the jig, and the main shaft of the central partition plate The receiving side end surface was brought into contact with the large diameter side end surface of the middle diameter portion end of the jig, and the portion of the crankshaft protruding from the main bearing was temporarily fitted by fitting into the inner diameter of the subtotal portion of the jig. The compression element is formed by a fourth step of setting the structure to a jig and a fifth step of fixing the upper structure, the lower structure, and the center partition plate by means such as bolting while rotating the crankshaft. The upper structure, the central partition, and the lower structure There is an effect that it is possible to issue a coaxial simultaneously. Also, since the center partition plate is positioned and the upper and lower cylinders are centered at the same time, the process of fixing the center partition plate to the upper cylinder or the lower cylinder by another means and the accompanying bolts and bolt holes are not required. This has the effect of reducing costs.

A first structure for manufacturing an upper structure by centering or eccentrically assembling a main bearing and an upper cylinder.
And manufacturing the lower structure by centering or eccentrically assembling the sub-bearing and the lower cylinder with high accuracy.
And a third step of manufacturing a structure in which the upper structure, the lower structure, the central partition plate, the pair of upper and lower rolling pistons, the pair of upper and lower vanes, and the crankshaft are temporarily assembled, and Using a jig in which the large-diameter portion, the middle-diameter portion, and the small-diameter portion are formed in a stepped shape, the outer diameter of the central partition plate is fitted into the large-diameter portion of the jig, and the main shaft of the central partition plate A structure in which the receiving end face is brought into contact with the large diameter end face of the middle diameter end of the jig, and the outer diameter of the boss portion of the main bearing is fitted into the inner diameter of the subtotal portion of the jig, thereby temporarily assembling the structure. A compression element is assembled from a fourth step of setting the upper structure, the lower structure, and the center partition plate by means such as bolting while rotating the crankshaft. The upper structure, the center partition, and the lower structure
There is an effect that the coaxial of the person can be simultaneously output.
Also, since the center partition plate is positioned and the upper and lower cylinders are centered at the same time, the process of fixing the center partition plate to the upper cylinder or the lower cylinder by another means and the accompanying bolts and bolt holes are not required. This has the effect of reducing costs.

[Brief description of the drawings]

FIG. 1 is a sectional view of a two-cylinder rotary compressor showing a first embodiment of the present invention.

FIG. 2 is a perspective view of a center partition plate showing the first and second embodiments of the present invention.

FIG. 3 is a sectional view of an assembly jig according to a third embodiment of the present invention.

FIG. 4 is a process chart showing an assembling method according to a third embodiment of the present invention.

FIG. 5 is a sectional view of an assembly jig according to a fourth embodiment of the present invention.

FIG. 6 is a process chart showing an assembling method according to a fourth embodiment of the present invention.

FIG. 7 is a sectional view of a conventional two-cylinder compressor.

[Explanation of symbols]

1 center partition, 1a inner diameter part, 1b outer diameter part,
1c main bearing side seat surface, 1d ring-shaped machined surface,
2 cylinder, 2a upper cylinder, 2b lower cylinder, 3 main bearing, 4 sub bearing, 5 crankshaft, 6 rolling piston, 6a upper rolling piston, 6b lower rolling piston, 7 vane, 7a upper vane, 7b lower vane, 8 rotation Numeral, 9 stator, 10 airtight container, 12 assembly jig, 12a large diameter part, 12b medium diameter part, 12c small diameter part, 12d large diameter part side end face of medium diameter part, 101 compression element, 102 electric element.

Claims (10)

[Claims] 1. A disk-shaped central partition plate having a hole in the center, and upper and lower cylinders arranged above and below the central partition plate.
A main bearing provided on an end face opposite to the center partition plate of the upper cylinder, a sub-bearing provided on an end face opposite to the center partition plate of the lower cylinder, and an eccentric portion in the upper and lower cylinders; A crankshaft supported by a sub-bearing, a pair of rolling pistons fitted on each eccentric part of the crankshaft on the inner diameter side of each of the upper and lower cylinders, and the rolling fit fitted into a vane slot provided in each of the upper and lower cylinders A compression element constituted by a pair of vanes reciprocating while abutting on the outer peripheral portion of the piston; and an electric element constituted by a stator and a rotor, which applies a rotational force to the crankshaft. The compression element and the electric element are housed in a closed container, and the compression element has the central partition plate fixed in the closed container by means such as welding. In the cylinder type rotary compressor, 2-cylinder rotary compressor, characterized in that the the outer diameter and the crankshaft of the central partition plate coaxially. 2. The two-cylinder rotary compressor according to claim 1, wherein an outer diameter of said center partition plate is made coaxial with an inner diameter. 3. The center partition plate has a ring-shaped machined surface which is the same as or parallel to the main bearing side seat surface, outside a portion of the main bearing side end surface which comes into contact with the upper cylinder. 3. The two-cylinder rotary compressor according to claim 1, wherein an outer diameter of the central partition plate is perpendicular to the ring-shaped processing surface. 4. The two-cylinder rotary compressor according to claim 3, wherein said main bearing is formed by coaxially processing an inner diameter and an outer diameter of a boss portion. 5. A crankshaft comprising: a large-diameter portion for accommodating a center partition plate; a medium-diameter portion for accommodating a bearing and a cylinder; and a small-diameter portion for accommodating a bearing or a crankshaft so that the crankshaft can rotate. An assembly jig for a two-cylinder rotary compressor, wherein an outer diameter of the central partition plate and the crankshaft can be guided coaxially by rotation. 6. A disk-shaped central partition plate having a hole in the center, and upper and lower cylinders disposed above and below the central partition plate.
A main bearing provided on an end face opposite to the center partition plate of the upper cylinder, a sub-bearing provided on an end face opposite to the center partition plate of the lower cylinder, and an eccentric portion in the upper and lower cylinders; A crankshaft supported by a sub-bearing, a pair of rolling pistons fitted on each eccentric part of the crankshaft on the inner diameter side of each of the upper and lower cylinders, and the rolling fit fitted into a vane slot provided in each of the upper and lower cylinders A compression element composed of a pair of vanes that reciprocate while abutting the outer periphery of the piston,
An electric jig, comprising a stator and a rotor, for applying a rotational force to the crankshaft, and an assembling jig for assembling a two-cylinder rotary compressor having an inner diameter slightly larger than the outer diameter of the central partition plate. A large-diameter portion having the bottom surface of the large-diameter portion machined at right angles to the large-diameter portion, a medium-diameter portion formed on the bottom surface of the large-diameter portion, and having an inner diameter smaller than the inner diameter of the large-diameter portion; A small-diameter portion that is coaxial with the main portion and has an inner diameter slightly larger than the diameter of the main bearing portion of the crankshaft and smaller than the medium-diameter portion. 7. A disk-shaped central partition plate having a hole in the center, and upper and lower cylinders disposed above and below the central partition plate.
A main bearing provided on an end face opposite to the center partition plate of the upper cylinder, a sub-bearing provided on an end face opposite to the center partition plate of the lower cylinder, and an eccentric portion in the upper and lower cylinders; A crankshaft supported by a sub-bearing, a pair of rolling pistons fitted on each eccentric part of the crankshaft on the inner diameter side of each of the upper and lower cylinders, and the rolling fit fitted into a vane slot provided in each of the upper and lower cylinders A compression element composed of a pair of vanes that reciprocate while abutting the outer periphery of the piston,
An assembly comprising a stator and a rotor, an electric element for applying a rotational force to the crankshaft, and assembling a two-cylinder rotary compressor in which the inner diameter and the outer diameter of the boss portion of the main bearing are coaxially processed. In the jig, a large-diameter portion having an inner diameter slightly larger than the outer diameter of the central partition plate, a bottom surface of the large-diameter portion machined at right angles to the large-diameter portion, and a middle diameter smaller than the inner diameter of the large-diameter portion. A jig for assembling a two-cylinder rotary compressor, comprising: a portion having a small diameter portion which is coaxial with the large diameter portion and which is slightly larger than the outer diameter of the boss portion of the main bearing and smaller than the middle diameter portion. 8. An upper structure in which a main bearing and an upper cylinder are centered or eccentrically assembled, a lower structure in which a sub-bearing and a lower cylinder are centered or eccentrically assembled, a center partition plate, and a pair of upper and lower rolling pistons. A step of manufacturing a structure in which a pair of upper and lower vanes and a crankshaft are temporarily assembled; a step of setting the jig in the temporarily assembled structure; and an outer diameter of the central partition plate and the crankshaft are coaxial. Fixing the upper structure, the lower structure, and the center partition plate so as to obtain a two-cylinder compressor. 9. A first step of manufacturing an upper structure by centering or eccentrically assembling a main bearing and an upper cylinder, and a lower structure by centering or eccentrically assembling a sub bearing and a lower cylinder. A second step of manufacturing a body, and a third step of manufacturing a structure in which the upper structure, the lower structure, the center partition plate, the pair of upper and lower rolling pistons, the pair of upper and lower vanes, and the crankshaft are temporarily assembled. Step, using a jig in which the temporarily assembled structure has a large-diameter portion, a middle-diameter portion, and a small-diameter portion formed in a stepped shape, fitting the outer diameter of the center partition plate into the large-diameter portion of the jig, The end surface of the center partition plate on the main bearing side is brought into contact with the end surface of the jig at the large diameter end of the middle diameter portion, and the portion of the crankshaft protruding from the main bearing is fitted into the inner diameter of the subtotal portion of the jig. The fourth step of setting the temporarily assembled structure to the jig And a fifth step of fixing the upper structure, the lower structure, and the center partition plate by means such as bolting while rotating the crankshaft. How to assemble a compressor. 10. A first step of manufacturing an upper structure by centering or eccentrically assembling a main bearing and an upper cylinder, and a lower structure by centering or eccentrically assembling a sub-bearing and a lower cylinder. A second step of manufacturing a body, and a third step of manufacturing a structure in which the upper structure, the lower structure, the center partition plate, the pair of upper and lower rolling pistons, the pair of upper and lower vanes, and the crankshaft are temporarily assembled. Process and
Using the jig in which the large-diameter portion, the middle-diameter portion, and the small-diameter portion are formed in a stepped shape, the outer diameter of the central partition plate is fitted into the large-diameter portion of the jig, and the central partition is formed. The main bearing side end face of the plate is brought into contact with the large diameter side end face of the middle diameter end of the jig, and the outer diameter of the boss portion of the main bearing is fitted into the inner diameter of the subtotal portion of the jig, thereby temporarily assembling. A fourth step of setting the assembled structure to a jig, and a fifth step of fixing the upper structure, the lower structure, and the center partition plate by means such as bolting while rotating the crankshaft. A method for assembling a two-cylinder compressor, comprising assembling elements.