JPH1113658A - Scroll compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scroll compressor excellent in reliability by eliminating a clearance between crank shaft direction contact surfaces of a crank shaft end housing part and an eccentric bearing by the eccentric bearing assembled with a crank shaft end part and the shape of a housing contact surface and an energizing means. SOLUTION: A scroll compressor is formed in such a constitution that a clearance between crank shaft direction contact surfaces of a crank shaft end housing part and an eccentric bearing is eliminated. A turning scroll bearing is formed in such a constitution that a cutout is arranged on a plate spring 14 in a projection part of the crank shaft housing part end, and thereby, a spring performance is provided. Arrows show crank shaft direction force generated by the cutout of the plate spring 14, and the crank shaft direction contact surfaces of the crank shaft end housing part and the eccentric bearing are tightly fitted to each other by the force. It is thus possible to make lubrication between the turning scroll shaft and the eccentric bearing in a good condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor used for an air conditioner for business use or home use, and more particularly to a shaft support structure for an orbiting scroll.

[0002]

2. Description of the Related Art As a conventional example, FIG. 5 shows an orbiting scroll shaft support structure of a vertical scroll compressor.

In FIG. 5, when the orbiting scroll 1 draws liquid refrigerant in a transient state in a refrigerating cycle or the like,
Alternatively, the eccentric bearing 2 supporting the orbiting scroll shaft 1a as described above is used as a support structure of the orbiting scroll shaft 1a that can move in the direction of reducing the orbiting radius of the orbiting scroll for the purpose of avoiding foreign substances and the like mixed in the cycle. And the crankshaft 3 are formed as separate components, the eccentric bearing 2 and the elastic body 4 are stored at the end of the crankshaft, and the orbiting scroll shaft supporting structure movable in the radial direction is formed.

Conventionally, as described in Japanese Patent Application Laid-Open No. H5-164083, etc., when such a orbiting scroll shaft support structure is used, the eccentric bearing 2 and the elastic body accommodated inside the storage portion at the end of the crankshaft. 4 rises, orbiting scroll 1
In order not to cause abnormal contact with the thrust surface 1b of the shaft or to cause abnormal wear of the orbiting scroll shaft 1a, the above-described floating of the crankshaft storage end and the eccentric bearing end occurs. Protrusions 3a, 2a for prevention
And the elastic body 4 acting as an energized force is installed between the convex portions.

[0005]

However, in the above-mentioned conventional construction, since there are gaps .delta.1 and .delta.2 in the crankshaft direction between the crankshaft end accommodating portion and the eccentric bearing and the elastic body, floating of the eccentric bearing is completely prevented. Can not do it.

Accordingly, a gap δ (= δ1 + δ2) is formed between the eccentric bearing and the contact surface of the crankshaft end storage portion in the crankshaft direction, and the lubricant leaks between the outer periphery of the eccentric bearing and the inner surface of the storage hole provided on the crankshaft end surface, turning. Since the amount of lubricating oil supplied to the scroll shaft and the inner surface of the eccentric bearing decreases, it is easy for the lubricating oil, which is liable to seize, to be in a severe state. A way to get rid of it was required.

An object of the present invention is to solve such a conventional problem and to provide a scroll compressor excellent in reliability.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an eccentric bearing and a storage contact surface shape and a storage contact surface built into an end of a crankshaft. This eliminates the gap δ between the contact surfaces in the crankshaft direction.

By eliminating the gap between the eccentric bearing and the contact surface of the crankshaft end storing section in the crankshaft direction, the lubricating oil supplied from the lubricating oil supply means is supplied between the orbiting scroll shaft and the inner surface of the eccentric bearing supporting the orbiting scroll shaft. The scroll compressor can be easily formed, and an excellent configuration of lubricating oil can be realized, and a scroll compressor having excellent reliability can be configured.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to the first aspect of the present invention provides a compression mechanism comprising a fixed scroll and a revolving scroll revolving by a rotation preventing mechanism in a closed container.
A motor for driving this through a crankshaft and a means for supplying lubricating oil to a compression mechanism are provided. An eccentric bearing intended to be movable so as to reduce the turning radius in the direction and an elastic body for holding the eccentric bearing are housed, and the housing end and the eccentric bearing end have a convex portion at a position opposed to the axial direction of the crankshaft. Is established,
This is a scroll compressor having an orbiting scroll shaft support mechanism using an elastic body that applies a load in the crankshaft direction between both convex portions. According to this configuration, the lubricating oil can be reliably supplied between the orbiting scroll shaft and the eccentric bearing.

According to a second aspect of the present invention, a leaf spring is used as the elastic body, and the leaf spring is provided with a notch near the convex portion of the storage end so as to have a spring property in the crankshaft direction. With this configuration, the lubricating oil can be reliably supplied between the orbiting scroll shaft and the eccentric bearing.

According to a third aspect of the present invention, a leaf spring is used as the elastic body, and the leaf spring is provided with a notch near the convex portion at the end of the eccentric bearing so as to have 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.

According to a fourth aspect of the present invention, in the scroll compressor having the compression mechanism according to the first aspect, a turning radius is reduced in a radial direction at an end of the crankshaft to which the orbiting scroll shaft is fitted. The eccentric bearing intended to be movable as described above and an elastic body for holding the eccentric bearing are housed, and the housing end and the eccentric bearing end are provided with protrusions at positions opposed to each other in the axial direction of the crankshaft. A scroll compressor having an orbiting scroll shaft support mechanism, which is installed between both convex portions and an elastic body having a sealing property is installed between the eccentric bearing and the contact surface in the crankshaft direction of the storage portion, according to this configuration. Lubricating oil can be reliably supplied between the orbiting scroll shaft and the eccentric bearing.

According to a fifth aspect of the present invention, as the elastic body,
5. The scroll compressor according to claim 4, wherein a lubricating oil can be reliably supplied between the orbiting scroll shaft and the eccentric bearing.

According to a sixth aspect of the present invention, in the scroll compressor having the compression mechanism according to the first aspect, a shaft of the orbiting scroll is fitted and moves in a direction to reduce the orbital radius by the biased force. And the radial contact surface between the eccentric bearing and the crankshaft housing is inclined, so that the eccentric bearing is pressed against the crankshaft contact surface of the housing by the biased force. A scroll compressor having a orbiting scroll shaft support mechanism, which has a structure capable of moving the orbiting scroll, and according to this structure, lubricating oil can be reliably supplied between the orbiting scroll shaft and the eccentric bearing.

According to a seventh aspect of the present invention, there is provided the scroll compressor according to the sixth aspect, wherein a leaf spring is used as the urging means. According to this structure, the lubricating oil is surely provided between the orbiting scroll shaft and the eccentric bearing. Can be supplied.

According to an eighth aspect of the present invention, there is provided the scroll compressor according to the sixth aspect, wherein a coil spring is used as the urging means. According to this configuration, the lubricating oil is reliably supplied between the orbiting scroll shaft and the eccentric bearing. Can be supplied.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 shows a configuration in which a gap between an eccentric bearing and a contact surface in the crankshaft direction of a crankshaft end storing portion in the present invention is eliminated. FIG. 4 is a configuration diagram of a orbiting scroll bearing configured by providing a notch and having a spring property. In FIG. 1, the arrow indicates the crankshaft direction force generated by the notch of the leaf spring, and this force allows the eccentric bearing and the crankshaft direction contact surface of the crankshaft end storing portion to be in close contact with each other, thereby turning. Lubrication between the scroll shaft and the eccentric bearing can be improved.

(Embodiment 2) FIG. 2 shows a configuration of a revolving scroll bearing having a notch of a leaf spring on the eccentric bearing side as a source of a crankshaft force in the above embodiment to provide a spring property. FIG. In FIG. 2, the arrow indicates the direction of the crankshaft caused by the notch of the leaf spring, and the eccentric bearing and the contact surface of the crankshaft end storage section in the crankshaft direction can be brought into close contact with each other by this force, as in the first embodiment. Thereby, lubrication between the orbiting scroll shaft and the eccentric bearing can be improved.

(Embodiment 3) FIG. 3 shows a structure in which a gap between an eccentric bearing and a contact surface in a crankshaft direction of a crankshaft end storage portion is eliminated according to the present invention. FIG. 3 is a configuration diagram of an orbiting scroll bearing in a case where a leaf spring is used as a source of radial force when ethylene chloride or the like is inserted. In FIG. 3, the eccentric bearing is pushed toward the orbiting scroll side as shown by an arrow. However, since the leaf spring adheres to the inside of the crankshaft housing and the convex portion of the eccentric bearing, as a result, the eccentric bearing does not jump out. The contact surface in the crankshaft direction can be brought into close contact. According to this embodiment, lubrication between the orbiting scroll shaft and the eccentric bearing can be improved.

(Embodiment 4) FIG. 4 shows a structure for eliminating a gap between an eccentric bearing and a crankshaft end storage section in the crankshaft direction according to the present invention. FIG. 7 is a configuration diagram of a orbiting scroll bearing when a leaf spring is used as a source of the radial force when the orbit is inclined. Here, by providing the inclined surface as shown in FIG. 4 on the opposite side in the radial direction, a force as shown by an arrow is generated, the eccentric bearing does not protrude from the storage part, and furthermore, the crank of the storage part and the eccentric bearing The contact surface in the axial direction can be brought into close contact. According to this embodiment, lubrication between the orbiting scroll shaft and the eccentric bearing can be improved.

[0023]

As is apparent from the above embodiment, the first aspect of the present invention is that the orbiting scroll is movable at the end of the crankshaft where the shaft of the orbiting scroll is fitted so as to reduce the orbital radius in the radial direction. The eccentric bearing for the purpose and the elastic body that holds it are housed, and the housing end and the eccentric bearing end are provided with protrusions at positions opposite to the axial direction of the crankshaft, and between the two protrusions in the crankshaft direction. This is a scroll compressor with an orbiting scroll shaft support mechanism using an elastic body that applies a load. According to this configuration, the storage section and the contact surface of the eccentric bearing in the crankshaft direction can be brought into close contact, and the orbiting scroll shaft and the eccentricity Good lubrication between bearings can be achieved.

According to a second aspect of the present invention, in the first aspect of the present invention, a leaf spring is used as the elastic body, and the leaf spring is provided with a notch near the convex portion at the end of the crankshaft housing hole.
A scroll compressor having a revolving scroll shaft support mechanism with spring properties in the crankshaft direction. According to this configuration, the storage portion and the contact surface of the eccentric bearing in the crankshaft direction can be brought into close contact, and the revolving scroll shaft and Lubrication between the eccentric bearings can be improved.

According to a third aspect of the present invention, in the first aspect of the present invention, a leaf spring is used as the elastic body, and the leaf spring has an eccentric bearing end convex which is opposed to a convex portion of the crankshaft housing hole end. A scroll compressor having a revolving scroll shaft support mechanism provided with a notch near the part and having spring characteristics in the crankshaft direction. According to this configuration, the contact surface of the eccentric bearing with the storage part in the crankshaft direction is brought into close contact. The lubrication between the orbiting scroll shaft and the eccentric bearing can be improved.

According to a fourth aspect of the present invention, in the scroll compressor having the compression mechanism according to the first aspect, a turning radius is reduced in a radial direction at an end of the crankshaft to which a turning scroll shaft is fitted. The eccentric bearing intended to be movable as described above and an elastic body for holding the eccentric bearing are housed, and the housing end and the eccentric bearing end are provided with protrusions at positions opposed to each other in the axial direction of the crankshaft. A scroll compressor having an orbiting scroll shaft support mechanism, which is installed between both convex portions and an elastic body having a sealing property is installed between the eccentric bearing and the contact surface in the crankshaft direction of the storage portion, according to this configuration. The contact surface of the storage portion and the eccentric bearing in the crankshaft direction can be brought into close contact, and the lubrication between the orbiting scroll shaft and the eccentric bearing can be improved.

According to a fifth aspect of the present invention, in accordance with the fourth aspect of the present invention, a leaf spring is used as the elastic body, and the leaf spring is provided between the two convex portions, and the eccentric bearing and the crank of the storage portion are provided. An elastic body with sealing properties was installed between the contact surfaces in the axial direction.
A scroll compressor with an orbiting scroll shaft support mechanism.
According to this configuration, the contact portion of the eccentric bearing in the direction of the crankshaft can be brought into close contact with the housing portion, and the lubrication between the orbiting scroll shaft and the eccentric bearing can be improved.

According to a sixth aspect of the present invention, in the scroll compressor having the compression mechanism according to the first aspect, a shaft of the orbiting scroll is fitted and moves in a direction to reduce the orbital radius by the biased force. And the radial contact surface between the eccentric bearing and the crankshaft housing is inclined, so that the eccentric bearing is pressed against the crankshaft contact surface of the housing by the biased force. A scroll compressor having a orbiting scroll shaft support mechanism, which has a structure that can be moved to the center. According to this structure, the housing and the contact surface of the eccentric bearing in the crankshaft direction can be brought into close contact, and the eccentricity with the orbiting scroll shaft can be achieved. Good lubrication between bearings can be achieved.

According to a seventh aspect of the present invention, in the sixth aspect, a leaf spring is used as the urging means. According to this configuration, the housing and the crankshaft of the eccentric bearing are used. The contact surfaces in the directions can be closely contacted, and the lubrication between the orbiting scroll shaft and the eccentric bearing can be improved.

According to an eighth aspect of the present invention, in the sixth aspect, a coil spring is used as the urging means. According to this configuration, the storage portion and the eccentric bearing are arranged in the crankshaft direction. Can be brought into close contact, and 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 configuration showing an embodiment of the present invention, and FIG. 1B is a sectional view of the bearing configuration.

FIG. 2A is a perspective view of a main part of an orbiting scroll bearing configuration showing another embodiment of the present invention, and FIG. 2B is a sectional view of the bearing configuration.

FIG. 3 (a) is a perspective view of a main part of an orbiting scroll bearing configuration showing one embodiment of the present invention, and (b) is a sectional view of the bearing configuration.

FIG. 4A is a perspective view of a main part of a configuration of an orbiting scroll bearing showing an embodiment of the present invention, and FIG. 4B is a sectional view of the bearing configuration.

FIG. 5 is a cross-sectional view of a configuration of an orbiting scroll bearing showing the conventional example and a flow chart of lubricating oil.

FIG. 6 is a cross-sectional view of the configuration of the orbiting scroll bearing in the case of severe lubricity showing the conventional example.

FIG. 7 is an exploded perspective view of the orbiting scroll bearing components showing the conventional example.

FIG. 8 is a cross-sectional view of a scroll compressor showing the conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 orbiting scroll 1a orbiting scroll shaft 1b orbiting scroll thrust surface 2 eccentric bearing 2a convex portion at eccentric bearing end 3 crankshaft 3a convex portion at crankshaft storage end 4 elastic body 5 fixed scroll 6 shell 7 rotor 8 stator 9 lubricating oil 10 lubrication Oil supply means (oil pump or the like) 11 Discharge pipe 12 Suction pipe 13 Leaf spring based on the second embodiment 14 Leaf spring based on the third embodiment 15 Elastic body having sealability based on the fourth embodiment 16 Fourth embodiment Bearing with inclined surface based on

Claims (8)

[Claims] 1. A closed container is provided with a compression mechanism, an electric motor for driving the compression mechanism, and means for supplying lubricating oil to the compression mechanism.
With a compressor constituted by these, a spiral spiral is formed by an involute curve or a curve similar thereto, and two of these springs are used to fix one (hereinafter referred to as a fixed scroll) and the other to the other. Is rotated by a crankshaft of the electric motor, which is a rotary drive element, using a rotation preventing mechanism (hereinafter, referred to as a orbiting scroll). In a scroll compressor constituting a compression mechanism, the orbit of the orbiting scroll is An eccentric bearing intended to be movable in the radial direction so as to reduce the turning radius and an elastic body for holding the eccentric bearing are housed at the end of the fitted crankshaft, and a crank is provided at the housing end and the eccentric bearing end. A orbiting scroll shaft support mechanism that uses a resilient body that provides a convex portion at a position facing the axial direction of the shaft and applies a load between both convex portions also in the crankshaft direction One scroll compressor. 2. The spring according to claim 1, wherein a leaf spring is used as the elastic body, and the leaf spring is provided with a notch near the convex portion of the storage end to have a spring property in the crankshaft direction. Scroll compressor. 3. The spring according to claim 1, wherein a leaf spring is used as the elastic body, and the leaf spring is provided with a notch near the convex portion at the end of the eccentric bearing so as to have a spring property in the crankshaft direction. Scroll compressor. And a means for supplying lubricating oil to the compression mechanism, an electric motor for driving the compression mechanism, and the compression mechanism.
In the compressor constituted by these, a spiral spiral is formed by an involute curve or a curve similar to the involute curve, two of these springs are used, one is used as a fixed scroll, and the other is a rotary drive element. By using a rotating shaft with a rotation preventing mechanism by a crankshaft of an electric motor, in a scroll compressor constituting a compression mechanism, a turning radius in a radial direction is applied to an end of the crankshaft where a shaft of the orbiting scroll is fitted. An eccentric bearing intended to be movable so as to be reduced and an elastic body for holding 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. The orbiting scroll shaft is installed between the two convex parts, and an elastic body with sealing properties is installed between the contact surface of the eccentric bearing and the storage part in the crankshaft direction. Scroll compressor with a lifting mechanism. 5. A resilient member which serves to move in a radial direction with respect to the crankshaft so as to reduce a turning radius in a storage portion of the orbiting scroll shaft support mechanism provided with the movable mechanism in the end of the crankshaft. The scroll compressor according to claim 4, wherein a leaf spring is used. 6. A closed container provided with a compression mechanism, an electric motor for driving the compression mechanism, and a means for supplying lubricating oil to the compression mechanism.
In the compressor constituted by these, a spiral spiral is formed by an involute curve or a curve similar to the involute curve, two of these springs are used, one is used as a fixed scroll, and the other is a rotary drive element. By using the crankshaft of the electric motor as the orbiting scroll using the anti-rotation mechanism, in the scroll compressor that constitutes the compression mechanism, the orbiting scroll shaft is fitted and the turning radius is reduced by the biased force. The eccentric bearing is supported by a movable eccentric bearing, and the radial contact surface between the eccentric bearing and the crankshaft housing is inclined, and the eccentric bearing is pressed against the crankshaft contact surface of the housing by the biased force. A scroll compressor having an orbiting scroll shaft support mechanism, which has a movable configuration so that it can be moved. 7. The scroll compressor according to claim 7, wherein a leaf spring is used as the urging means. 8. The scroll compressor according to claim 7, wherein a coil spring is used as the urging means.