JP3687279B2 - Scroll compressor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a scroll compressor used for commercial and home air conditioners, and more particularly to a shaft support structure for a turning scroll.
[0002]
[Prior art]
As a conventional example, FIG. 5 shows a turning scroll shaft support structure of a vertical scroll compressor.
[0003]
In FIG. 5, the orbiting scroll 1 is a direction in which the turning radius of the orbiting scroll is reduced when liquid refrigerant is sucked in a refrigeration cycle in a transient state, or for the purpose of avoiding foreign matters mixed in the cycle. As described above, the eccentric bearing 2 that supports the orbiting scroll shaft 1a and the crankshaft 3 are configured as separate parts, and the eccentric bearing 2 and the elastic body are provided at the end of the crankshaft. 4 is stored, and the orbiting scroll shaft support structure is configured to be movable in the radial direction.
[0004]
Conventionally, as described in Japanese Patent Laid-Open No. 5-164083 and the like, when such a orbiting scroll shaft support structure is used, the eccentric bearing 2 and the elastic body 4 which are housed inside from the storage portion of the crankshaft end are lifted. The crankshaft storage end and the eccentric bearing described above do not cause any problem in reliability such as abnormal contact with the thrust surface 1b of the orbiting scroll 1 or abnormal wear of the orbiting scroll shaft 1a. Protrusions 3a and 2a for preventing lifting are provided at the ends, and an elastic body 4 acting as an urging force is disposed between the protrusions.
[0005]
[Problems to be solved by the invention]
However, in the above-described conventional configuration, since there are gaps δ1, δ2 in the crankshaft direction between the crankshaft end storage portion, the eccentric bearing, and the elastic body, the lifting of the eccentric bearing cannot be completely prevented.
[0006]
Accordingly, a gap δ (= δ1 + δ2) is generated in the crankshaft contact surface between the eccentric bearing and the crankshaft end storage portion, and lubricating oil leaks between the outer periphery of the eccentric bearing and the inner surface of the storage hole provided on the end face of the crankshaft. Since the lubricating oil supplied to the inner surface of the eccentric bearing decreases, the lubricating oil that tends to seize is likely to be in a severe condition, and there is a method of eliminating the gap δ between the eccentric bearing and the crankshaft contact surface of the crankshaft end storage portion. It was requested.
[0007]
The present invention solves such conventional problems, and an object thereof is to provide a scroll compressor excellent in reliability.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a clearance δ between the eccentric bearing and the crankshaft end storage portion of the eccentric bearing and the crankshaft end storage portion by means of the eccentric bearing and the storage contact surface shape and biasing means incorporated in the crankshaft end portion. It is something to lose.
[0009]
By eliminating the gap between the eccentric bearing and the crankshaft contact surface of the crankshaft end storage portion, the lubricating oil supplied from the lubricating oil supply means can easily flow between the orbiting scroll shaft and the inner surface of the eccentric bearing that supports it. Thus, an excellent configuration of the lubricating oil can be realized, and a highly reliable scroll compressor can be configured.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, there is provided a compression mechanism portion composed of a fixed scroll and a turning scroll that makes a turning motion by a rotation prevention mechanism in an airtight container, an electric motor that drives the compression mechanism portion via a crankshaft, and a compression Means for supplying lubricating oil to the mechanism section are provided, and in a scroll compressor constituted by these, the end of the crankshaft to which the orbiting scroll shaft is fitted is movable so as to reduce the orbiting radius in the radial direction. The intended eccentric bearing and the elastic body that holds the eccentric bearing are housed, and a convex portion is provided at a position opposite to the axial direction of the crankshaft at the housing end portion and the eccentric bearing end portion, and the convex shaft is provided between both convex portions in the crankshaft direction. A scroll compressor having an orbiting scroll shaft support mechanism using an elastic body that applies a load. According to this configuration, the lubricating oil can be reliably supplied between the orbiting scroll shaft and the eccentric bearing.
[0011]
The invention according to claim 2 is characterized in that a leaf spring is used as an elastic body, the leaf spring is provided with a notch near the storage end convex portion, and has a spring property in the crankshaft direction. According to this configuration, the lubricating oil can be reliably supplied between the orbiting scroll shaft and the eccentric bearing.
[0012]
The invention according to claim 3 is characterized in that a leaf spring is used as an elastic body, the leaf spring is provided with a notch near the eccentric bearing end convex portion, and has a spring property in the crankshaft direction. According to this configuration, the lubricating oil can be reliably supplied between the orbiting scroll shaft and the eccentric bearing.
[0013]
According to a fourth aspect of the present invention, in the scroll compressor having the compression mechanism according to the first aspect, the crankshaft end portion on which the shaft of the orbiting scroll is fitted is movable so as to reduce the orbiting radius in the radial direction. it houses the elastic body for pressing this with eccentric bearing for the purpose of that, the convex portion is provided on the eccentric bearing end the housing end position opposing the axial direction of the crankshaft, the first elastic body the A scroll compressor having a orbiting scroll shaft support mechanism, which is installed between both convex portions and in which a second elastic body having a sealing property is installed between contact surfaces of the eccentric bearing and the storage portion in the crank shaft direction. According to this, lubricating oil can be reliably supplied between the orbiting scroll shaft and the eccentric bearing.
[0014]
According to a fifth aspect of the present invention, in the scroll compressor according to the fourth aspect of the present invention, a leaf spring is used as the first elastic body. According to this configuration, there is no problem between the orbiting scroll shaft and the eccentric bearing. Can be supplied with lubricating oil.
[0015]
According to a sixth aspect of the present invention, in the scroll compressor having the compression mechanism according to the first aspect, the orbiting scroll shaft can be fitted and biased to move in a direction to reduce the orbiting radius. The eccentric contact is supported by an eccentric bearing, and the radial contact surface of the eccentric bearing and the crankshaft storage part is inclined, and the eccentric bearing can be moved so as to be pressed against the contact surface in the crankshaft direction of the storage part by the biased force. A scroll compressor having an orbiting scroll shaft support mechanism and having this structure, according to this configuration, it is possible to reliably supply lubricating oil between the orbiting scroll shaft and the eccentric bearing.
[0016]
According to a seventh aspect of the present invention, in the scroll compressor according to the sixth aspect of the present invention, a leaf spring is used as the biasing means. According to this configuration, the lubricating oil is reliably supplied between the orbiting scroll shaft and the eccentric bearing. be able to.
[0017]
The invention according to claim 8 is the scroll compressor according to claim 6, wherein a coil spring is used as the biasing means. According to this configuration, the lubricating oil is reliably supplied between the orbiting scroll shaft and the eccentric bearing. Can do.
[0018]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0019]
(Example 1)
FIG. 1 shows a structure in which a clearance between the eccentric bearing and the crankshaft contact surface of the crankshaft end storage portion in the present invention is eliminated, and a notch of a leaf spring is provided on the convex portion of the crankshaft storage portion end, It is a turning scroll bearing block diagram comprised by giving. In FIG. 1, the arrow indicates the crankshaft direction force generated by the notch of the leaf spring, and this force can bring the eccentric bearing and the crankshaft contact surface of the crankshaft end storage portion into close contact with each other. The lubrication between the scroll shaft and the eccentric bearing can be made good.
[0020]
(Example 2)
FIG. 2 is a configuration diagram of the orbiting scroll bearing in which a notch of a leaf spring is provided on the side of the eccentric bearing as a generation source of the crankshaft direction force in the above-described embodiment so as to have a spring property. In FIG. 2, the arrow indicates the crankshaft direction generated by the notch of the leaf spring, and the eccentric bearing can be brought into close contact with the crankshaft contact surface of the crankshaft end storage portion as in the first embodiment. Thereby, the lubrication between the orbiting scroll shaft and the eccentric bearing can be improved.
[0021]
(Example 3)
FIG. 3 shows a configuration in which the clearance between the eccentric bearing and the crankshaft contact surface of the crankshaft end storage portion in the present invention is eliminated, and a second elastic body (for example, tetrafluoroethylene etc.) having a sealing property between them is provided. It is a turning scroll bearing block diagram at the time of using a leaf | plate spring as a 1st elastic body which inserts and generate | occur | produces radial direction force. In FIG. 3, the eccentric bearing is pushed toward the orbiting scroll as shown by the arrow, but the leaf spring is in close contact with the inside of the crankshaft housing and the convex portion of the eccentric bearing, so that the eccentric bearing does not pop out as a result. The contact surface in the crankshaft direction can be brought into close contact. According to this embodiment, the lubrication between the orbiting scroll shaft and the eccentric bearing can be made satisfactory.
[0022]
(Example 4)
FIG. 4 shows a configuration in which the clearance between the eccentric bearing and the crankshaft storage portion of the crankshaft end storage portion in the present invention is eliminated, and the radial contact surface between the eccentric bearing and the crankshaft storage portion is inclined to obtain the radial force. It is a turning scroll bearing block diagram at the time of using a leaf | plate spring as a generation source of this. Here, by providing an inclined surface as shown in FIG. 4 on the opposite side in the radial direction, a force as indicated by an arrow is generated, and the eccentric bearing does not jump out of the storage portion. The contact surface in the axial direction can be brought into close contact. According to this embodiment, the lubrication between the orbiting scroll shaft and the eccentric bearing can be made satisfactory.
[0023]
【The invention's effect】
As is apparent from the above-described embodiments, the invention according to claim 1 is an eccentricity intended to be movable at the end of the crankshaft to which the shaft of the orbiting scroll is fitted so as to reduce the orbiting radius in the radial direction. Elasticity that accommodates the bearing and the elastic body that holds it, provides convex portions at the storage end and the eccentric bearing end at positions corresponding to the axial direction of the crankshaft, and applies a load also between the convex portions in the crankshaft direction This structure is a scroll compressor having a rotating scroll shaft support mechanism using a body. According to this configuration, the contact portion in the crankshaft direction of the storage portion and the eccentric bearing can be brought into close contact, and lubrication between the rotating scroll shaft and the eccentric bearing can be achieved. It can be good.
[0024]
The invention according to claim 2 is the invention according to claim 1, wherein a leaf spring is used as the elastic body, and a notch is provided near the convex portion of the end of the crankshaft housing hole in the leaf spring, and the crankshaft direction The scroll compressor with the orbiting scroll shaft support mechanism that has the spring property of this structure, this structure can contact the contact surface in the crankshaft direction of the storage portion and the eccentric bearing, between the orbiting scroll shaft and the eccentric bearing It is possible to improve the lubrication.
[0025]
According to a third aspect of the present invention, in the first aspect of the invention, a leaf spring is used as the elastic body, and the leaf spring is closer to the eccentric bearing end convex portion facing the convex portion of the crankshaft housing hole end. This is a scroll compressor that has a notch and has a rotating scroll shaft support mechanism with springiness in the crankshaft direction. According to this configuration, the contact surface in the crankshaft direction of the storage portion and the eccentric bearing can be brought into close contact. The lubrication between the orbiting scroll shaft and the eccentric bearing can be made satisfactory.
[0026]
According to a fourth aspect of the present invention, in the scroll compressor having the compression mechanism according to the first aspect, the crankshaft end portion on which the shaft of the orbiting scroll is fitted is movable so as to reduce the orbiting radius in the radial direction. it houses the elastic body for pressing this with eccentric bearing for the purpose of that, the convex portion is provided on the eccentric bearing end the housing end position opposing the axial direction of the crankshaft, the first elastic body the A scroll compressor having a orbiting scroll shaft support mechanism, which is installed between both convex portions and in which a second elastic body having a sealing property is installed between contact surfaces of the eccentric bearing and the storage portion in the crank shaft direction. Accordingly, the contact surface of the storage portion and the eccentric bearing in the crankshaft direction can be brought into close contact with each other, and the lubrication between the orbiting scroll shaft and the eccentric bearing can be improved.
[0027]
The invention according to claim 5 is the invention according to claim 4, wherein a leaf spring is used as the first elastic body, the leaf spring is installed between both convex portions, and the eccentric bearing and the crank of the storage portion are provided. A scroll compressor having an orbiting scroll shaft support mechanism in which a second elastic body having a sealing property is installed between contact surfaces in the axial direction. According to this configuration, the contact surface in the crank shaft direction of the storage portion and the eccentric bearing And the lubrication between the orbiting scroll shaft and the eccentric bearing can be improved.
[0028]
According to a sixth aspect of the present invention, in the scroll compressor having the compression mechanism according to the first aspect, the orbiting scroll shaft can be fitted and biased to move in a direction to reduce the orbiting radius. The eccentric contact is supported by an eccentric bearing, and the radial contact surface of the eccentric bearing and the crankshaft storage part is inclined, and the eccentric bearing can be moved so as to be pressed against the contact surface in the crankshaft direction of the storage part by the biased force. The scroll compressor having the orbiting scroll shaft support mechanism, which has a simple structure, can contact the storage surface and the contact surface in the crankshaft direction of the eccentric bearing. Lubrication can be made good.
[0029]
The invention described in claim 7 uses a leaf spring as the biasing means in the invention described in claim 6, and according to this configuration, the storage portion and the eccentric bearing contact in the crankshaft direction. The surfaces can be brought into close contact with each other, and the lubrication between the orbiting scroll shaft and the eccentric bearing can be made satisfactory.
[0030]
The invention described in claim 8 uses a coil spring as the biasing means in the invention described in claim 6, and according to this configuration, the contact surface of the storage portion and the eccentric bearing in the crankshaft direction is used. And the lubrication between the orbiting scroll shaft and the eccentric bearing can be improved.
[Brief description of the drawings]
FIG. 1A is a perspective view of a main part of an orbiting scroll bearing structure showing an embodiment of the present invention. FIG. 2B is a sectional view of the bearing structure. FIG. 2A is another embodiment of the present invention. FIG. 3B is a cross-sectional view of the main structure of the orbiting scroll bearing structure showing FIG. 3. FIG. 3A is a main part perspective view of the orbiting scroll bearing structure showing an embodiment of the present invention. FIG. 4 (a) is a perspective view of the main part of the orbiting scroll bearing structure showing an embodiment of the present invention. FIG. 5 (b) is a sectional view of the bearing structure. FIG. 6 is a cross-sectional view of the orbiting scroll bearing structure and a flow chart of the lubricating oil. FIG. 6 is a cross-sectional view of the orbiting scroll bearing structure when the lubricity is severe. Exploded perspective view [FIG. 8] Cross-sectional view of the scroll compressor showing the conventional example [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Orbiting scroll 1a Orbiting scroll shaft 1b Orbiting scroll thrust surface 2 Eccentric bearing 2a Convex part 3 of eccentric bearing end Crankshaft 3a Convex part of crankshaft storing end 4 Elastic body 5 Fixed scroll 6 Shell 7 Rotor 8 Stator 9 Lubricating oil 10 Lubrication Oil supply means (oil pump, etc.)
DESCRIPTION OF SYMBOLS 11 Discharge pipe 12 Intake pipe 13 Leaf spring 14 based on the present embodiment 2 Leaf spring 15 based on the present embodiment 3 Elastic body 16 having sealing properties based on the present embodiment 4 Eccentric bearing having an inclined surface based on the present embodiment 4

Claims (8)

  The airtight container is provided with a compression mechanism section, an electric motor that drives the compression mechanism, and a means for supplying lubricating oil to the compression mechanism section. The compressor is constituted by these, and has a spiral shape with an involute curve or a similar curve. Using two springs, one is fixed (hereinafter referred to as a fixed scroll), and the other is swiveled using a rotation prevention mechanism by the crankshaft of the electric motor, which is a rotation drive element. (Hereinafter, referred to as orbiting scroll), in the scroll compressor constituting the compression mechanism, the crankshaft end portion into which the orbiting scroll shaft is fitted is movable so as to reduce the orbiting radius in the radial direction. An eccentric bearing for this purpose and an elastic body that holds the eccentric bearing are housed, and a convex portion is provided at a position opposite to the axial direction of the crankshaft at the housing end and the eccentric bearing end. Provided, the scroll compressor having a orbiting scroll shaft support mechanism using an elastic member applying a load to the crankshaft direction between both protrusions.   2. The scroll compressor according to claim 1, wherein a leaf spring is used as an elastic body, and the leaf spring is provided with a cutout near the convex portion at the storage end so as to have a spring property in the crankshaft direction.   The scroll compressor according to claim 1, wherein a leaf spring is used as an elastic body, and the leaf spring is provided with a notch near the eccentric bearing end convex portion so as to have a spring property in a crankshaft direction. The airtight container is provided with a compression mechanism section, an electric motor that drives the compression mechanism, and a means for supplying lubricating oil to the compression mechanism section. The compressor is constituted by these, and has a spiral shape with an involute curve or a similar curve. By using two of these honeys, one is used as a fixed scroll, and the other is used as a turning scroll using an anti-rotation mechanism by the crankshaft of the electric motor that is a rotational drive element. In the scroll compressor to be configured, an eccentric bearing intended to be movable so as to reduce the turning radius in the radial direction at the end of the crankshaft to which the shaft of the turning scroll is fitted, and a first elastic body for holding the eccentric bearing accommodated, a convex portion is provided on the eccentric bearing end the housing end position opposing the axial direction of the crankshaft, the first elastic body set between the two protrusions And, between the contact surfaces of the crankshaft direction of the storage portion and the eccentric bearing, the eccentric bearing and the crank shaft by installing a second elastic body having a sealing property is a load is applied in a direction away, orbiting scroll shaft support A scroll compressor with a mechanism. As a first elastic body that works for the purpose of moving to reduce the turning radius in the radial direction with respect to the crankshaft in the storage portion of the orbiting scroll shaft support mechanism provided with the movable mechanism in the crankshaft end, The scroll compressor according to claim 4, wherein a leaf spring is used.   The airtight container is provided with a compression mechanism section, an electric motor that drives the compression mechanism, and a means for supplying lubricating oil to the compression mechanism section. The compressor is constituted by these, and has a spiral shape with an involute curve or a similar curve. By using two of these honeys, one is used as a fixed scroll, and the other is used as a turning scroll using an anti-rotation mechanism by the crankshaft of the electric motor that is a rotational drive element. In the scroll compressor to be configured, the shaft of the orbiting scroll is fitted and supported by an eccentric bearing capable of moving in a direction to reduce the orbiting radius by the biased force, and the radius of the eccentric bearing and the crankshaft storage portion The directional contact surface is inclined, and the eccentric bearing moves so as to be pressed against the crankshaft contact surface of the storage part by the biased force. Having both ability configuration, the scroll compressor having a orbiting scroll shaft support mechanism. 7. The scroll compressor according to claim 6 , wherein a leaf spring is used as the biasing means. The scroll compressor according to claim 6 , wherein a coil spring is used as the biasing means.

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