JP3731357B2 - Scroll compressor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a scroll compressor for refrigerant used in a refrigeration system, an air conditioner, and the like, and a detent mechanism for a scroll compressor for air compression.
[0002]
[Prior art]
Conventionally, in this type of compressor, as shown in FIG. 7, a stator 4 of an electric motor 3 that drives a compression mechanism 2 is fixed inside a sealed container 1, and the compression mechanism 2 is driven by a rotor 5 of the electric motor 3. The crankshaft 6 is fixed. A lower part of the sealed container 1 is a lubricating oil reservoir 7.
[0003]
The compression mechanism 2 swivels a fixed spiral blade member 10 integrally formed with a fixed spiral blade 9 on a fixed frame body 8 and a swirl spiral blade 11 that meshes with the fixed spiral blade 9 to form a plurality of compression work spaces 14. The swirl spiral blade member 13 formed on the end plate 12 and an Oldham joint 15 that prevents the swirl swirl blade 13 from rotating and allows only swirl, and the swirl end plate 12 is opposite to the swirl spiral blade 11. The pivot drive shaft 16 provided in the main shaft 17 is inserted into an eccentric bearing 18 inside the main shaft 17 formed at one end of the crank shaft 6, and the crank shaft 6 has a main bearing member 19 having a main bearing 19 that supports the main shaft 17. 20 and a secondary bearing 21 that supports the shaft portion of the crankshaft 6 opposite to the main shaft. A hole 8 communicates with the inside of the turning end plate 12 and the turning drive shaft 16. The main bearing 19 and the sub bearing 21 are fixed to the sealed container 1 by welding or the like by the main bearing member 20 and the sub bearing support member 24, respectively. In addition, a casing 23 is formed on the auxiliary bearing 21 in order to provide an oil supply mechanism 22 at the end of the crankshaft 6. An oil suction pipe 27 is connected to the casing 23, and the lower end of the oil suction pipe 27 is immersed in the lubricating oil reservoir 7.
[0004]
On the other hand, an oil feed passage 28 is formed in the crankshaft 6, one connected to the space inside the casing and the other connected to each sliding portion of the compression mechanism 2. Lubricating oil drawn by the suction pressure on the outer periphery of the swivel end plate 12 is sucked in from the oil suction pipe 27 by the communicating hole 69 opened inside the swivel end plate 12 and the swivel drive shaft 16, and each slide is passed through the oil feed path 28. After lubricating the moving part, it is discharged into the sealed container 1 and returns to the oil suction pipe 27 through the gap between the electric motor 3 and the sealed container 1. Further, the refrigerant sucked from the suction pipe 29 of the compressor is compressed in the compression work space 14 in the compression mechanism 2, passes through the discharge port 30, passes through the discharge pipe 31 provided in the sealed container 1 near the oil supply path 22, It is discharged out of the compressor.
[0005]
As shown in FIGS. 7 and 8, the Oldham joint 15 slides the pair of key grooves 32 and the swirling spiral blade member 13 disposed on the main bearing member 20 into the pair of key grooves 33 disposed on the swivel end plate 12, respectively. The nail | claw part 41 and the nail | claw part 40 to which a movement is fitted are comprised, and the nail | claw part 40 becomes a shape which protruded outside from the ring-shaped part 34 which connects the nail | claw part 40 and the nail | claw part 41. FIG.
[0006]
[Problems to be solved by the invention]
However, since the claw portion 40 protrudes outside the ring-shaped portion 32 in the conventional Oldham joint 15, the ring-shaped portion 34 and the claw portion 40 are subjected to finishing processing so as to have a fitting size with the key groove 30. A burr is generated at the boundary 46 between the corner and the finished processed portion of the claw 40, and an extra facility or operator is required to remove the burr, and the processed surface of the claw 40 is removed when removing the burr. There was a problem that the parts would be defective if scratched.
[0007]
The present invention solves the above-described conventional problems, and an object of the present invention is to provide an inexpensive scroll fluid machine by facilitating the removal of burrs to reduce the manufacturing cost.
[0008]
Another object of the present invention is to solve the above-mentioned conventional problems, and to reduce the production cost by suppressing the generation of burrs and to provide an inexpensive scroll fluid machine.
[0009]
Furthermore, the present invention solves the above-mentioned conventional problems, and aims to provide an inexpensive scroll compressor by reducing the manufacturing cost by reducing the number of processed parts with a sintered material and suppressing the occurrence of burrs. It is what.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, the present invention forms the ring-shaped part into a wide shape on both sides of the claw part so as to be flush with the outer peripheral surface of the claw part protruding from the ring-shaped part of the Oldham joint. Is.
[0011]
The above configuration eliminates the boundary between the claw portion and the corner portion of the ring-shaped portion and the finish-finished portion of the claw portion, so that when the claw portion is machined, the burr only on the outer peripheral side of the ring-shaped portion and the outer peripheral side. Is generated, and deburring is facilitated. In addition, since the finished portion is not damaged during deburring, the manufacturing cost can be reduced, and an inexpensive scroll compressor can be provided.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, the ring-shaped portion is formed in a wide shape on both sides of the claw portion so as to be flush with the surface protruding in the outer peripheral direction of the claw portion protruding from the ring-shaped portion of the Oldham joint. It is a thing. This eliminates the boundary between the corners of the claw part of the ring-shaped part and the finished processed part of the claw part, so that burrs are generated only on the outer side of the ring-shaped part. Thus, the manufacturing cost can be reduced.
[0013]
The invention according to claim 2 is such that the ring-shaped portion is oval.
In the invention according to claim 3, the ring-shaped part is formed in a wide shape on both sides of the claw part so as to be flush with the surface of the claw part protruding from the ring-shaped part of the Oldham joint. Furthermore, chamfering is performed on the opposite side of the claw portion along the outer shape of the ring-shaped portion, starting from the intersection of each claw portion and the ring-shaped portion. This eliminates the boundary between the ring-shaped portion, the corner of the claw portion, and the finished processed portion of the claw portion, and the burr at the time of claw-finished processing is chamfered at the intersection with the ring-shaped portion outer shape. The generation of burrs can be suppressed, the deburring operation can be facilitated, and the manufacturing cost can be reduced.
[0014]
According to a fourth aspect of the present invention, the ring-shaped portion has an oval shape.
Further, in the invention according to claim 5, the ring-shaped part is formed in a shape having a wide width on both sides of the claw part so as to be flush with the surface protruding in the outer peripheral direction of the claw part protruding from the ring-shaped part of the Oldham joint. Further, a chamfered shape having a fine flat portion extending from the intersection of each claw portion and the ring-shaped portion to the opposite side of the claw portion along the outer shape of the ring-shaped portion is given. This eliminates the boundary between the ring-shaped part, the corner of the claw part, and the finished part of the claw part, and the burr at the time of finishing the claw part has a fine flat part at the intersection with the outer shape of the ring-like part. Due to the chamfering, the generation of burrs can be suppressed, the deburring work can be facilitated, and the manufacturing cost can be reduced. In addition, since a small flat part is arranged on the outer side of the chamfered shape, it becomes easy to mold the material with a sintered product, so it is possible to make an inexpensive material and further reduce the manufacturing cost. Can be realized.
[0015]
Further, in the invention described in claim 6, the ring-shaped portion has an oval shape.
[0016]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0017]
Example 1
In FIG. 1, it is comprised from the ring-shaped part 34 of Oldham coupling 15, two claws 40 provided in a pair on the upper surface, and two claws 41 provided in a pair on the lower surface. It is arranged. The surface facing the ring center of each claw is configured to be flush with the inner peripheral surface 42 of the ring-shaped portion 34, the lower surface claw 41 has the same width as the ring-shaped portion 34, and the upper surface claw 40 has a ring shape. It protrudes from the part 34 to the outer peripheral side. Furthermore, the ring-shaped portion 34 is configured to be wide on both sides of the claw so that both sides of the claw 40 on the upper surface are flush with the surface 43 protruding in the outer peripheral direction of each claw.
[0018]
In the above embodiment, when the claw portion 40 is processed to the fitting dimension with the key groove, the burr is formed in the thickness direction of the claw portion 34 of the inner periphery side intersection portion 44 and the outer periphery side intersection portion 45 with the outer shape and the ring shape portion 34. However, since both are locations along the outer shape of Oldham's joint, deburring work is easy and there is no secondary disaster such as scratches on the processed surface of the claw part. An inexpensive scroll compressor can be provided.
[0019]
The same effect can be obtained by linearly expanding the width of the ring-shaped part 34 on both sides of the claw as shown in FIG. Moreover, if chamfering is installed at the intersection with the ring-shaped portion in the claw thickness direction, the generation of burrs in the claw thickness direction can be suppressed, and a more inexpensive scroll compressor can be obtained. In addition, if a chamfered shape having a minute flat portion is arranged at the intersection with the ring shape portion in the claw thickness direction, the material can be formed with a sintered alloy, and an inexpensive scroll compressor is obtained. I can do it.
[0020]
(Example 2)
In FIG. 3, the Oldham coupling 15 includes a ring-shaped portion 34, two claws 40 provided in a pair on the upper surface, and two claws 41 provided in a pair on the lower surface. It is arranged. The surface facing the ring center of each claw is configured to be flush with the inner peripheral surface 52 of the ring-shaped portion 34, the claw 41 on the lower surface is the same width as the ring-shaped portion 34, and the claw 40 on the upper surface is ring-shaped. It protrudes from the part 34 to the outer peripheral side. Further, the ring-shaped portion 34 is configured to be wide on both sides of the claw so that both sides of the claw 40 on the upper surface are flush with the surface 53 protruding in the outer peripheral direction of each claw. Starting from the intersections 54, 55, 56, 57 of the pair of claw portions 40, 41 and the ring-shaped portion 34, chamfers 54a, 55a, 56a and 57a are configured.
[0021]
In the above embodiment, when the claw portion 40 is processed to the fitting dimension with the key groove, the burr is generated in the thickness direction of the claw portion 40 of the inner periphery side intersection portion 58 and the outer periphery side intersection portion 59 with the outer shape. Since both are locations along the outer shape of Oldham's joint, a low-cost scroll compressor is provided that is easy to deburr and that does not cause secondary disasters such as scratching the processed surface of the claws. I can do it.
[0022]
Note that the same effect can be obtained by linearly expanding the width of the ring-shaped part 34 on both sides of the claw as shown in FIG. Moreover, if chamfering is installed at the intersection with the ring-shaped portion in the claw thickness direction, the generation of burrs in the claw thickness direction can be suppressed, and a cheaper scroll compressor can be obtained. In addition, if a chamfered shape having a minute flat portion is arranged at the intersection with the ring shape portion in the claw thickness direction, the material can be formed with a sintered alloy, and an inexpensive scroll compressor is obtained. I can do it.
[0023]
Example 3
5, the ring-shaped portion 34 of the Oldham coupling 15 is composed of two claws 40 provided in a pair on the upper surface and two claws 41 provided in a pair on the lower surface. It is arranged. The surface of each claw facing the ring center is configured to be flush with the inner peripheral surface 62 of the ring-shaped portion 34, the lower surface claw 41 has the same width as the ring-shaped portion 34, and the upper surface claw 40 has a ring shape. It protrudes from the part 34 to the outer peripheral side. Further, the ring-shaped portion 34 is configured to be wide on both sides of the claw so that both sides of the claw 40 on the upper surface are flush with the surface 63 protruding in the outer peripheral direction of each claw. Starting from the intersections 64, 65, 66, and 67 of the pair of claw portions 40 and 41 and the ring-shaped portion 34, a micro-planar portion is provided on the opposite side of the claw portions 40 and 41 along the outer shape of the ring-shaped portion 34. Chamfered shapes 64a, 65a, 66a, 67a are formed.
[0024]
In the above embodiment, since the minute flat surface portion 64b is provided in the chamfered shape 64a in the vicinity of the claw portion 40 of the ring-shaped portion 34, since it can be formed from a material with high dimensional accuracy such as a sintered alloy, there is no roughing process. Since it can be used as a part that can be used only by finishing the claw portions 40 and 41, an inexpensive part can be obtained. Further, when the claw portion 40 is finished to the fitting dimension with the key groove, the burr is generated in the thickness direction of the claw portion 40 of the inner periphery side intersection portion 68 and the outer periphery side intersection portion 69 with the outer shape. Since it is a location along the outer shape of the joint, it is possible to provide an inexpensive scroll compressor that is easy to deburr and that does not cause a secondary disaster such as scratching the processed surface of the claw portion.
[0025]
Note that the same effect can be obtained by linearly expanding the width of the ring-shaped part 34 on both sides of the claw as shown in FIG. In addition, if the chamfered shape has a minute flat surface at the intersection with the ring-shaped part in the claw thickness direction, the generation of burrs in the claw thickness direction can be suppressed and a cheaper scroll compressor can be obtained. I can do it.
[0026]
In any of the embodiments, one end face of the claw portion has a shape protruding from the ring-shaped portion, but the same is true even if the end surface of the other claw portion protrudes from the ring-shaped portion.
[0027]
【The invention's effect】
As apparent from the above embodiment, according to the invention described in claim 1, after the claw portion is processed, the width is increased by the thickness of the ring shape portion from the ring shape portion to the outer peripheral portion of the claw portion. The burr is generated in a portion along the outer shape of the ring-shaped portion. Therefore, the deburring operation is facilitated, and no secondary disaster occurs during the deburring operation, so that inexpensive parts can be supplied, and an inexpensive scroll compressor can be provided.
[0028]
As is apparent from the above embodiment, according to the invention described in claim 3, the width of the ring-shaped portion is increased from the ring-shaped portion to the outer peripheral surface of the claw portion, and the width of the claw portion and the ring portion is increased. By chamfering along the ring-shaped portion from the intersecting portion, burrs after processing the claw portion are generated along the thickness direction of the claw portion of the outer shape of the ring-shaped portion. Therefore, the deburring operation is facilitated, and no secondary disaster occurs during the deburring operation, so that inexpensive parts can be supplied, and an inexpensive scroll compressor can be provided.
[0029]
As apparent from the above embodiment, according to the invention described in claim 5, the width of the ring-shaped part is increased from the ring-shaped part to the outer peripheral surface of the claw part, and the width of the claw part and the ring part is increased. By arranging a chamfered shape with a minute flat part from the intersection part along the ring shape part, the material can be manufactured with sintered alloy, and there are no roughing processes and parts can be obtained with few machining processes I can do it. Moreover, the burr | flash after a nail | claw part process will generate | occur | produce along the thickness direction of the nail | claw part of the external shape of a ring-shaped part. Therefore, there is no roughing process, and it is possible to obtain an Oldham joint at an inexpensive manufacturing cost with few machining processes. Furthermore, the deburring operation is easy and no secondary disaster occurs during the deburring operation. Parts can be supplied, and a low-cost scroll compressor can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view of an Oldham joint showing an embodiment of the first invention of the present invention. FIG. 2 is a perspective view of an Oldham joint showing another embodiment of the first invention of the present invention. FIG. 4 is a perspective view of an Oldham joint showing another embodiment of the second invention of the present invention. FIG. 5 is a perspective view of an Oldham joint showing an embodiment of the third invention of the present invention. FIG. 6 is a perspective view of an Oldham joint showing another embodiment of the third aspect of the present invention. FIG. 7 is a cross-sectional view of a horizontal hermetic scroll compressor. FIG. 8 is a perspective view of an Oldham joint showing a conventional example. Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Airtight container 2 Compression mechanism 3 Electric motor 6 Crankshaft 7 Lubricating oil reservoir 8 Fixed frame body hole 9 Fixed spiral blade 10 Fixed spiral blade member 11 Swirling spiral blade 12 Swirling end plate 13 Swirling spiral blade member 14 Compression work space 15 Oldham coupling 16 Swirling Drive shaft 17 Main shaft 18 Eccentric bearing 19 Main bearing 20 Main bearing member 21 Sub bearing 22 Oil supply mechanism 23 Casing 24 Sub bearing support member 26 Pump shaft 27 Oil suction pipe 28 Oil supply path 29 Intake pipe 30 Discharge port 31 Discharge pipe 32, 33 Keyway 34 Ring-shaped part 40, 41 Claw 42, 52, 62 Inner peripheral surface 43, 53, 63 Surface 44, 58, 68 projecting in the inner peripheral direction Inner peripheral side tolerance part 45, 59, 69 Outer peripheral side tolerance part 54, 55, 56, 57, 64, 65, 66, 67 Intersections 54a, 55a, 56a, 57a Chamfers 64a, 65a, 66a, 67 a Chamfered shape 64b having a minute plane part Minute plane part

Claims (6)

Fixed scrolls and orbiting scrolls that form a compression chamber by projecting spiral wall surfaces such as involute on the end plate and combining the spiral wall surfaces with each other, and preventing rotation of the orbiting scrolls around the orbiting scroll axis In the scroll compressor having an Oldham joint which is an anti-rotation mechanism for orbiting the orbiting scroll, the Oldham joint is provided with a pair of a ring-shaped portion and a pair of upper and lower surfaces of the ring-shaped portion. At a position symmetrical to the center of each of the two ring-shaped portions of each pair of the claw portions, and two pairs perpendicular to each other in the ring diameter direction, Each claw portion protrudes in the ring thickness direction so that the surface facing the center of the ring-shaped portion is flush with the inner peripheral surface of the ring-shaped portion. The part has the same width as the ring-shaped part and protrudes in the ring thickness direction, and the other pair of claws protrudes in the circumferential direction of the ring-shaped part, so that it is flush with the surface protruding in the outer peripheral direction A scroll compressor characterized in that a ring-shaped part is formed into a wide shape on both sides of a claw part. The scroll compressor according to claim 1, wherein the ring-shaped portion is an ellipse. Fixed scrolls and orbiting scrolls that form a compression chamber by projecting spiral wall surfaces such as involute on the end plate and combining the spiral wall surfaces with each other, and preventing rotation of the orbiting scrolls around the orbiting scroll axis In the scroll compressor having an Oldham joint which is an anti-rotation mechanism for orbiting the orbiting scroll, the Oldham joint is provided with a pair of a ring-shaped portion and a pair of upper and lower surfaces of the ring-shaped portion. Two pairs of each of the claw portions are in symmetrical positions with respect to the center of the ring-shaped portion, and two pairs are perpendicular to each other in the ring diameter direction. A pair of claws projecting in the ring thickness direction so that the surface facing the ring center of each claw is flush with the inner peripheral surface of the ring-shaped part A chamfer is formed on the opposite side of the claw part along the outer shape of the ring-shaped part starting from the intersection of the claw part and the ring-shaped part, with the same width as the ring-shaped part and protruding from the intersection of the claw part and the ring-shaped part. The claw portion also protrudes in the circumferential direction of the ring-shaped portion, and the ring-shaped portion is formed in a wide shape on both sides of the claw portion so as to be flush with the surface protruding in the outer circumferential direction. A scroll compressor characterized in that a chamfer is formed on the opposite side of the claw portion along the outer diameter of the ring-shaped portion, starting from the intersection of the ring-shaped portion. The scroll compressor according to claim 3, wherein the ring-shaped portion is an ellipse. A spiral scroll wall such as involute protrudes from the end plate, and by combining the spiral wall surfaces with each other, the fixed scroll and the orbiting scroll that form a compression chamber, and the rotation of the orbiting scroll around the orbiting scroll axis are prevented. In the scroll compressor having an Oldham joint which is an anti-rotation mechanism for orbiting the orbiting scroll, the Oldham joint is provided with a pair of a ring-shaped portion and a pair of upper and lower surfaces of the ring-shaped portion. Two pairs of each of the claw portions are in symmetrical positions with respect to the center of the ring-shaped portion, and two pairs are perpendicular to each other in the ring diameter direction. Each claw portion protrudes in the ring thickness direction so that the surface facing the center of the ring-shaped portion is flush with the inner peripheral surface of the ring-shaped portion. The part has the same width as the ring-shaped part and protrudes in the ring thickness direction, and has a small flat part on the opposite side of the claw part along the outer shape of the ring-shaped part, starting from the intersection of the claw part and the ring-shaped part. The other pair of claw portions protrudes also in the outer circumferential direction of the ring-shaped portion, and the ring-shaped portion is placed on both sides of the claw portion so as to be flush with the surface protruding in the outer circumferential direction. Formed in a wide shape, and it has a chamfered shape with a small flat part on the opposite side of the claw part along the outer diameter of the ring part, starting from the intersection of each claw part and ring part Scroll compressor. The scroll compressor according to claim 5, wherein the ring-shaped portion is an ellipse.

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