JP2000287424A - Rotor of rotary compressor and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost of a balancing device of an armature used in a DC motor. SOLUTION: An air conditioner compresses refrigerant with a compressor. As the compressor, a rotary compressor is used. In a rotor 32 of a DC motor of the rotary compressor, a balancing device 40 fixed to the rotor 32 is formed by laminating a plurality of balancers 41, which are clamped by supporting plates 42. The area of a part where a large weight is necessary in the balancers 41 is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor of a rotary compressor and a method of manufacturing the rotor, and more particularly, to a rotor of a rotary compressor and a rotor capable of manufacturing a balance device at low cost. And a method for producing the same.

[0002]

2. Description of the Related Art Today, air conditioners are widely used in homes and the like. Such an air conditioner compresses a refrigerant with a compressor, and a number of configurations such as a reciprocating compressor, a rotary compressor, and a scroll compressor have been proposed for the compressor.

However, there is no difference between these compressors in that the compression chamber is mechanically reduced by the power of a DC motor.

A DC motor is composed of a cylindrical stator fixed to a case and a rotor inserted in the stator, and the rotor is rotated by receiving a magnetic force by a magnetic field generated by the stator. It has become.

At this time, in order to adjust the imbalance of the rotor, a balancer formed by die casting is provided above the rotor.

[0006] A magnetizing member is embedded in the yoke portion of the rotor so as to generate a high torque, and is magnetized after assembling the DC motor to form a permanent magnet.

[0007]

However, die-casting is expensive, and the mold used when creating a balancer using this member has a problem that the cost is high because the number of times it can be used is relatively small. Was.

[0008] The balancer stacks a plurality of plates,
In some cases, this is formed by caulking at the same time as punching, but in this case, since punching oil is used for punching, there is a problem that the punching oil enters between the laminated plate materials and makes cleaning and removal difficult. Was.

Accordingly, an object of the present invention is to provide a DC motor of a compressor capable of solving the above problems.

[0010]

According to a first aspect of the present invention, there is provided a rotor for a DC motor of a rotary compressor, comprising a plurality of balancers mounted on a balance device mounted on the rotor. And the balancer is made of a plate material.

The invention according to claim 2 is characterized in that a portion of the balancer requiring a large weight is formed by enlarging the area.

According to a third aspect of the present invention, the balancer includes:
The plate material is formed by press punching.

According to a fourth aspect of the present invention, in a rotor of a DC motor of a rotary type compressor, a balance device attached to the rotor laminates a plurality of balancers, and the balancers are formed of two substantially disk-shaped ones. And a concave portion for positioning is formed in the support plate.

According to a fifth aspect of the present invention, in a rotor of a DC motor of a rotary compressor, a balance device attached to the rotor stacks a plurality of balancers, and the balancers are formed of two substantially disk-shaped balancers. And a fold is formed in the support plate, and a cutout that fits into the fold is provided in the balancer.

According to a sixth aspect of the present invention, in a rotor of a DC motor of a rotary type compressor, a balance device attached to the rotor stacks a plurality of balancers, and the balancers are formed of two substantially disk-shaped balancers. And a punching process for punching the balancer and the supporting plate, and a crimping process for crimping these.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram when a DC motor according to the present invention is applied to a rotary compressor.
The DC motor 10 is a driving element, and has a compression element provided below the DC motor 10.

The compression element is urged by a cylinder 11 forming a compression chamber for taking in and compressing the refrigerant, a roller 12 disposed in the cylinder 11 and rotating, a high-pressure refrigerant, etc., and is ejected into the cylinder 11. And a main bearing 13 provided at an upper portion of the cylinder 11, a sub bearing 14 provided at a lower portion of the cylinder 11, and the like.

A rotary shaft 15 of the DC motor 10 is disposed so as to pass through the cylinder 11, and a crank 16 is provided in the cylinder 11. The crank 16 rotates the roller 12 eccentrically in the cylinder 11. It is configured as follows.

The rotating shaft 15 is supported by a main bearing 13 and a sub bearing 14. That is, the radial direction of the rotating shaft 15 is supported by the main bearing 13 and the sub-bearing 14,
The thrust direction is supported by the auxiliary bearing 14.
The main bearing 13 and the sub-bearing 14 allow the cylinder 11
The inside is closed to form a closed space.

Further, the inside of the rotary shaft 15 is formed hollow, and an oil passage 17 is provided.
An oil supply hole 18 penetrates in the radial direction of the rotating shaft 15 in the vicinity of the upper and lower ends.

The lower end of the oil passage 17 has a rotating shaft 15
A screw (not shown) fixed to the oil passage 17 is provided so that the screw sucks up the oil 20 stored in the bottom of the sealed case 19 into the oil passage 17 as the rotating shaft 15 rotates.

As a result, the oil passage 17 is filled with the oil 20, and the oil 20 flows out of the oil supply hole 18, so that the sliding surface of the rotating shaft 15 and the main bearing 13 and the sliding surface of the rotating shaft 15 and the sub bearing 14 are formed. The sliding surface is lubricated.

Roller 12 disposed in cylinder 11
Is rotated by the rotation of a crank 16 disposed inside thereof, and rotates in contact with a vane urged inside the cylinder 11 by a high-pressure refrigerant or the like which is compressed and discharged. Therefore, the space formed by the roller 12 and the cylinder 11 is partitioned by the vane to form an intake chamber and a compression chamber (not shown).

The cylinder 11 is provided with an intake port 22 for communicating the intake pipe 21 with the intake chamber.
The refrigerant is sucked from outside the machine into the suction chamber through the outside.

The intake chamber becomes a compression chamber as the roller 12 rotates, and the compression chamber is reduced to compress the refrigerant and discharge it from the discharge pipe 26 to the outside of the machine.

The DC motor 10 has a cylindrical stator 31 fixed to the sealed case 19 and a rotor 32 inserted in the stator 31. The rotor 32 is driven by a magnetic field generated by the stator 31. Is rotated by the magnetic force.

FIG. 2 shows a top view of the rotor 32 and FIG.
Shows a side sectional view thereof.

As can be seen from these figures, the rotor 32
A balance device 40 is provided on the head, and a rivet 33 is inserted through the yoke portion to fix the balance device 40. A magnetized member 34 that becomes a permanent magnet by magnetizing is embedded in the yoke portion.

The balance device 40 is formed to have a balancer 41 made of a member such as brass, which is appropriately smaller than the diameter of the rotor 32, and has a diameter substantially equal to the diameter of the rotor 32. A support plate 42 made of stainless steel or the like is provided.

The balancer 41 has fixing holes 44 for fixing the balance device 40 to the rotor 32 with rivets 33,
It has a balance portion 45 which is a substantially semicircular plate material for keeping the rotation balance of the rotor 32.

Conventionally, the balance portion 45 has been formed by providing a projection (this projection acts as the balancer 41) on a disk material. Therefore, the weight of the member used increases as the amount of the member used increases.

The support plate 42 made of a member such as stainless steel prevents the magnetic flux lines from extending along the rotation axis so that the magnetic field does not spread over a wide range.

A recess 46 is provided in the support plate 42 of the opposing support plate 42 at a position away from the rotor 32. The concave portion 46 is used for positioning when the magnetized member 34 is magnetized.

As described above, since the balance portion 45 is formed in a substantially semicircular shape and smaller than the diameter of the rotor 32 to reduce the weight and the consumption of members, the positioning concave portion 46 is conventionally balanced. Since it is difficult to provide the portion 45, the present invention provides the support plate 42 as described above.

Incidentally, the balance portion 45 is formed by laminating a plurality of balancers 41. In some cases, such a balance portion 45 is formed by stacking and punching plate materials serving as a base material of the balancer 41 and simultaneously performing crimping.

At this time, the punching oil is used as described above. However, since the balancers 41 are caulked and integrated, it is difficult to wash and remove the punching oil that has entered between the balancers 41. Was.

Of course, it is also possible to punch out the balancers 41 one by one without laminating the base material and to laminate them, but in this case, if the balancers 41 are not strictly aligned with each other, the balancer 41 is not required. The operation value is reduced, so that the operation becomes troublesome.

Therefore, in the present invention, as shown in FIG.
A notch 47 is provided around a hole of the balancer 41 through which the rotating shaft 15 is inserted, and a fold 48 is formed in the support plate 42.

FIG. 4A shows a top view of the balancer 41 thus formed, and FIG. 4B shows a top view of the support plate. The support plate 42 shown in FIG.
Is not yet bent, and a cross-sectional view when bent is shown in FIG. 4C. Further, FIG. 4D is a cross-sectional view when such a balancer 41 is positioned and stacked using the support plate 42.

Therefore, even if the balancers 41 are punched one by one, the alignment when stacking the balancers 41 is facilitated, and the punching oil can be easily washed and removed.

Then, the balancers 41 are positioned by folding the support plate 42, and are caulked together as shown in FIG. 5, so that there is no displacement and there is no residual washing of the punching oil. 40 can be formed.

At this time, if the punching and caulking are performed by a composite press machine capable of performing both the punching process and the caulking process, the number of working steps is reduced and the cost is reduced.

Reference numeral 49 denotes a caulking portion formed when the support plate 42 and the balancer 41 are caulked together.

[0044]

As described above, according to the first aspect of the present invention, the balance device attached to the rotor is formed by laminating a plurality of balancers and this balancer is made of a plate material, so that the cost can be reduced. Becomes possible.

According to the second aspect of the present invention, the area of the portion of the balancer requiring a large weight is increased, so that the cost can be reduced.

According to the third aspect of the present invention, since the balancer is formed by pressing the plate material, the cost can be reduced.

According to the fourth aspect of the present invention, the balance device attached to the rotor is formed by stacking a plurality of balancers, and sandwiching the balancer between two substantially disk-shaped support plates. Since the positioning recess is formed in the support plate, the positioning in the magnetization becomes easy.

According to the fifth aspect of the present invention, the balance device mounted on the rotor is formed by stacking a plurality of balancers, and sandwiching the balancer between two substantially disk-shaped support plates, and Since the support plate is formed with a fold and a cutout that fits into the fold is provided in the balancer, the balancer can be easily overlapped.

According to the sixth aspect of the present invention, the balance device attached to the rotor is formed by stacking a plurality of balancers and sandwiching the balancer between two substantially disk-shaped support plates. Since the punching process for punching the balancer and the support plate and the caulking process for caulking are performed by a composite press machine, the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a rotary compressor applied to an embodiment of the present invention.

FIG. 2 is a top view of a rotor.

FIG. 3 is a side view of a rotor.

FIG. 4 is a diagram showing a configuration of a balancer and a support plate.

FIG. 5 is a view when a balancer and a support plate are caulked by a composite press machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 DC motor 15 Rotating shaft 31 Stator 32 Rotor 33 Rivets 34 Magnetizing member 40 Balancer 41 Balancer 42 Support plate 44 Fixing hole 45 Balance part 46 Recess 47 Notch 48 Fold

Continuation of the front page (72) Inventor Matsu-Saki ▼ 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Hideaki Tsukamoto 2--5 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. F term (reference) 5H607 AA04 BB01 BB04 BB14 CC01 CC03 DD02 DD03 EE40 FF07 5H615 AA01 BB01 BB07 BB14 BB16 PP02 SS03 SS05 SS20 SS54 SS57 5H621 GA01 GA04 GA16 HH01 JK15 CB05 CA03 CB05 PP03 PP10 PP11 PP14 PP16

Claims (6)

[Claims] 1. A rotor of a DC motor of a rotary compressor, wherein a balance device attached to the rotor is formed by laminating a plurality of balancers, and the balancer is made of a plate material. Compressor rotor. 2. The rotary compressor rotor according to claim 1, wherein a portion of the balancer requiring a large weight is formed by increasing an area. 3. The rotor of a rotary compressor according to claim 1, wherein the balancer is formed by stamping a plate material. 4. A rotor of a DC motor of a rotary compressor, wherein a balance device attached to the rotor stacks a plurality of balancers and combines the balancers with a substantially disc-shaped two-piece.
A rotor for a rotary compressor, wherein the rotor is sandwiched between a plurality of support plates and a concave portion for positioning is formed in the support plate. 5. A rotor of a DC motor of a rotary compressor, wherein a balance device attached to the rotor stacks a plurality of balancers, and this balancer is mounted on a substantially disk-shaped two-wheel motor.
A rotor for a rotary compressor, wherein the rotor is formed by being sandwiched by a plurality of support plates, and a fold is formed in the support plate, and a cutout that fits into the fold is provided in the balancer. 6. A rotor of a DC motor of a rotary type compressor, wherein a balance device attached to the rotor stacks a plurality of balancers, and this balancer is formed into a substantially disc-shaped two-piece.
Manufacturing a rotor characterized in that it is formed by sandwiching between a plurality of support plates, and in which case, a punching process for punching the balancer and the support plate and a caulking process for caulking these are performed by a composite press machine. Method.