JPH1182328A - Scroll fluid machine having rotation blocking mechanism for revolving scroll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scroll fluid machine which has a rotation blocking mechanism for a revolving scroll mechanism, and which can be easily manufactured and assembled. SOLUTION: In this scroll fluid machine having a rotation blocking mechanism for a revolving scroll, a plurality of rotation blocking mechanisms 10 for a revolving scroll 12, which limit the revolving of the revolving scroll 12 and revolves the revolving scroll to a fixed scroll 11, are mounted between the fixed scroll 11 and the revolving scroll 12, the both are connected, and an absorbing mechanism for absorbing the revolving error on the driving between the both scrolls 11, 12, is formed by installing the elastic members 23, 24 on the rotation blocking mechanism 10. The absorbing mechanism for absorbing the revolving error, is formed by burying the crank pins 21, 22 having the shaft centers separated by a specific distance, onto the front and rear faces of a crank plate 11g, the crank pins 21, 22 are respectively connected with the both scrolls 11, 12 through the bearings 6, 7, 8, 9, and the crank pin 21 at the revolving scroll side is connected with the bearings 6, 7 through the elastic members 23, 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll fluid machine for compressing, expanding and pumping a fluid, and more particularly to a orbiting scroll for orbiting a fixed scroll in which the orbiting scroll revolves while restricting the orbiting of the orbiting scroll. The present invention relates to a scroll fluid machine having a rotation preventing mechanism.

[0002]

2. Description of the Related Art Conventionally, a scroll fluid machine provided with a rotation preventing mechanism between a fixed scroll and an orbiting scroll to restrict the orbiting of the orbiting scroll so that the orbiting scroll can revolve with respect to the fixed scroll is good. Are known.

The anti-rotation mechanism has a pin implanted in one of a fixed and orbiting scroll, and the pin is rotatably fitted in an opening as a regulating cam provided in the other scroll so as to rotate the orbiting scroll. A method of restricting the orbiting area, or providing a crank plate between the fixed scroll and the orbiting scroll, and implanting a crank pin whose axis is shifted by the amount of the restricted area on the front and back of the crank plate, It is known as a method of restricting the orbiting region of the orbiting scroll by fixing each of them to a fixed or rotatable opening formed in the orbiting scroll.

However, in both of these methods, the swiveling range is regulated by the sliding contact of a plant such as a pin or a crank pin with a mating sliding contact surface. The contact position varies depending on the planting angle of the plant that is planted on the scroll or crank plate of the plant. In other words, if the plant is manufactured to be tilted in a certain direction with respect to the reference position of the scroll or the crank plate, the tilted portion will bite into the contact surface of the other party that comes into contact with the plant. It requires a dimensional margin to absorb errors.

For this reason, each scroll mechanism is manufactured with high precision to minimize the combination error between the two scrolls, and to allow the contact surface with the other member to absorb a contact error. And one is formed larger.

However, according to the above prior art,
Since there is a margin between the implant and the sliding surface of the other party, the implant is inclined toward the sliding surface of the other party by centrifugal force, and the rotational position of the implant itself is more than the rotation center of the orbiting scroll. Due to the relative fluctuation, the centrifugal force also fluctuates and the implanted body swings with respect to the sliding surface of the other party, causing a fretting phenomenon on the implanted body and the sliding surface of the other party, generating abnormal noise. , Lowering the durability of the scroll mechanism.

[0007] Further, because of the margin, the amount of contact between the laps increases, the contact resistance increases, and a driving source having a large driving force is required. Detachment of surface treatment layer, baking of wrap, and fretting phenomenon,
The airtightness of the closed space formed by the wrap of the fixed scroll and the orbiting scroll is reduced, and the durability of the scroll mechanism is reduced.

[0008]

As a technique for solving the above-mentioned problems, two fixed scroll-side bearings are used.
The bearing on the orbiting scroll side uses a JIS clearance symbol C3 to C5 with a radial gap larger than normal,
The fitting between the bearing box of the orbiting scroll and the bearing outer diameter is
Japanese Patent Publication No. 4-47121 discloses an arrangement in which an elastic body is interposed between the bearing housing and the bearing without a loose fit.

This technique is, for example, when the nominal bearing inner diameter of a deep groove ball bearing is 30 to 40 mm, when the value of the radial internal clearance exceeds the turning error of the turning scroll of C2 minimum 1 μm to C5 maximum 64 μm, the clearance gap The range permitted by fitting (for example, 25 μm) is to be absorbed by the elastic body interposed between the bearing box and the bearing.

However, in the dimensions from the reference position of each scroll to the wrap wall surface, the dimensions from the center position of the bearing, and the like, errors due to the manufacture of the fixed scroll and the orbiting scroll are accumulated by assembly. Further, the combination of the inner diameter of the bearing housing, the outer diameter of the bearing, and the like also result in a cumulative error. Therefore, the bearing and the crankpin may interfere with each other due to the accumulated error in the range shown in the conventional technique, and a high technology is required to keep the accumulated error within the range.

In addition, since the elastic body that absorbs the accumulated error is interposed between the bearing box and the bearing, the inner peripheral surface of the scroll-side bearing box into which an existing bearing is fitted. Need to be grooved. Shaft grooving may be performed by turning with a lathe, but grooving of the inner peripheral surface needs to be performed at a constant depth with a milling machine, which is difficult to perform, increases processing time, and increases cost.

In the case of assembling the bearing and the crankpin, the inner ring O-ring system in which an elastic member is interposed between the crankpin and the bearing inserts the bearing into the bearing box side and then inserts the crankpin. When the bearing is inserted, the bearing can be received from the lower side of the substantially entire lower surface of the bearing, so that the bearing can be stably pressed. And when press-fitting the crankpin into the bearing, it is possible to easily press-fit the crankpin into the bearing with a weaker force than by press-fitting the bearing into the bearing box side by supporting the eccentric crankpin directly below from below. it can.

However, in the case of the outer ring O-ring system in which an elastic member is interposed between the bearing and the bearing box, the crankpin is pressed into the bearing and then the bearing is pressed into the bearing box. Since the eccentric crankpin is pressed into the bearing, the bearing cannot be directly supported from below.If the jig that makes the crankpin improper is used, not only will the crankpin shaft bend, An eccentric load acts on the bearing, and the life may be shortened. Also, the bending of the crankpin reduces the performance of the compressor. Therefore, advanced technology is required.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a scroll fluid machine having a rotation preventing mechanism of a revolving scroll mechanism which is easy to process and manufacture and assemble.
Another object of the present invention is to provide a scroll fluid machine provided with an absorption mechanism in which a range for absorbing a rotational error in driving in a rotation preventing mechanism of the orbiting scroll mechanism is widened and improved. Another object of the present invention is to prevent a fretting phenomenon caused by a rotation error in driving in a rotation preventing mechanism of a orbiting scroll mechanism, and to improve the durability of a scroll machine. Another object of the present invention is to prevent fretting phenomenon occurring on the wrap wall surfaces of both scrolls and improve the durability of the scroll machine.

[0015]

Means for Solving the Problems Claim 1 of the first invention.
With respect to the fixed scroll, a plurality of orbiting scroll rotation preventing mechanisms for restricting the turning of the orbiting scroll and revolving the orbiting scroll are provided between the fixed scroll and the orbiting scroll, and both are connected. A scroll fluid machine having a rotation preventing mechanism for a orbiting scroll configured by interposing an elastic member in the rotation preventing mechanism, wherein the absorbing mechanism absorbs a rotational error in driving between the two scrolls; A crank pin having a shaft center separated by a predetermined distance is implanted on the front and back of the crank plate, and the crank pin is connected to each of the two scrolls via a bearing, and the crank pin on the orbiting scroll side is provided with the elastic member. It is characterized in that it is connected to a bearing through the intermediary.

As described above, in the absorbing mechanism according to the first aspect, the crank pin on the orbiting scroll side is connected to a bearing via the elastic member, and further connected to the orbiting scroll via the bearing. Therefore, since the groove in which the elastic member is interposed may be cut in the outer periphery of the crankpin, a scroll fluid machine having a rotation preventing mechanism of the orbiting scroll mechanism that can be easily manufactured can be provided.

The first aspect of the present invention is an inner ring O-ring system in which an elastic member is interposed between the crankpin and the bearing. The crankpin is inserted after the bearing is pressed into the bearing box side. By supporting the portion directly below the crank pin from below, the crank pin can be easily and stably pressed into the bearing with a smaller force than when the bearing is pressed into the bearing box side.

Further, the effective means of the first invention is such that the bearing on the orbiting scroll side is further connected to the orbiting scroll via an elastic member. It is. With this structure, the orbiting error of the orbiting scroll has a wide error absorption range by the two elastic members, and the elastic member is interposed between the crankpin and the bearing on the orbiting scroll side. Therefore, the crank mechanism integral with the crank plate and the crank pin is held by the orbiting scroll with a frictional force by the elastic force of the elastic member, and the crank mechanism can be attached to the orbiting scroll mechanism at the time of assembly. Even when the orbiting scroll mechanism is not temporarily tightened even if the orbital scroll mechanism is moved, the work does not drop and the workability can be improved.

According to a second aspect of the present invention, a rotation preventing mechanism for orbiting the revolving scroll, which restricts the revolving of the orbiting scroll and revolves with respect to the fixed scroll, comprises the fixed scroll and the orbiting scroll. A rotation preventing mechanism for the orbiting scroll, wherein an absorbing mechanism for absorbing a driving orbiting error between the two scrolls is provided by interposing an elastic member in the rotation preventing mechanism. In the scroll fluid machine having the above, the absorption mechanism implants a crankpin having a shaft center separated by a predetermined distance on the front and back of a crank plate, and attaches the crankpin to each of the two scrolls, a bearing and the elastic member. Characterized by being connected via

According to the third aspect of the present invention, the absorbing mechanism absorbs a driving turning error between the two scrolls, so that the occurrence of a fretting phenomenon between the two scrolls is suppressed, the durability is good, and the turning error is reduced. It is economical because there is no need to use a large output drive source that covers the load.

Further, it is an effective means of the present invention that the elastic member is disposed between the bearing and the crank pin on the orbiting scroll side and between the bearing and the orbiting scroll. is there. Here, the elastic member includes a rubber-based elastic body irrespective of whether it is intrinsic or synthetic, and a plate or a striate having spring properties.

With such a configuration, the orbiting error of the orbiting scroll has a wide error absorption range by the two elastic members, and the elastic member is interposed between the crankpin and the bearing on the orbiting scroll side. Therefore, the crank mechanism integrated with the crank plate and the crank pin is held by the orbiting scroll with a frictional force by the elastic force of the elastic member, and the crank mechanism can be attached to the orbiting scroll mechanism at the time of assembly. Thus, even if the orbiting scroll mechanism is moved even if it is not temporarily fastened with a screw or the like, the orbiting scroll mechanism does not fall and the workability can be improved.

Further, as a fifth aspect of the present invention, the crank pin on the orbiting scroll side may be provided with a plurality of bearings. If the crank pin on the orbiting scroll side has a structure in which a plurality of the bearings are interposed, the swing in the tilt direction of the crank pin with respect to the rotation center line of the bearing in the assembled state causes the crank pin to move in the axial direction. Since the bearing is held at a plurality of locations, the number of bearings is smaller than in the case of one bearing. Therefore, the dimensional margin in the absorption mechanism is not small, and it is economical to use a small elastic member.

According to a sixth aspect of the present invention, the resilient member is disposed between the fixed scroll side crank pin and the bearing and between the bearing and the fixed scroll. It is.

According to the above construction, a third aspect is provided.
In addition to the operation and effect described in the above, the orbiting error of the orbiting scroll will have a wide error absorption range by the two elastic members, and the fixed scroll side crankpin and bearing are provided with the elastic member , The crank mechanism integrated with the crank plate and the crank pin is held by the fixed scroll by frictional force by the elastic force of the elastic member, and the crank mechanism is attached to the fixed scroll mechanism at the time of assembly. Therefore, even if the fixed scroll mechanism is not temporarily tightened with screws or the like, the fixed scroll mechanism is not dropped and the workability can be improved.

According to a third aspect of the present invention, there is provided the scroll fluid machine according to the third aspect of the present invention, wherein the scroll fluid machine has a rotation preventing mechanism for rotating the orbiting scroll and revolving the orbiting scroll with respect to the fixed scroll. The orbiting scroll and the orbiting scroll are connected to each other through the plurality of rotation preventing mechanisms, and an absorbing mechanism for absorbing a driving orbiting error between the two scrolls is driven by the orbiting scroll and the orbiting scroll. It is characterized by being arranged between the drive shaft.

According to a seventh aspect of the present invention, the absorbing mechanism is a mechanism for absorbing a positional deviation in operation of the two scrolls due to a manufacturing and assembling error of the two scrolls, and applies a fluid or magnetic force to a driving source of the orbiting scroll mechanism. A configuration in which the intermediate rotating body is floated and disposed so as to slide on the sliding contact surface of the orbiting scroll, and a configuration in which the driving source is slidably contacted with the sliding contact surface of the orbiting scroll via an elastic member. Including.

According to a seventh aspect of the present invention, an absorbing mechanism for absorbing a rotational error in driving between the two scrolls is provided between the orbiting scroll and a drive shaft for driving the orbiting scroll. Therefore, since the turning error in driving between the two scrolls is absorbed by the absorbing mechanism, the occurrence of fretting phenomenon between the two scrolls is suppressed, the durability is good, and a large load covering the load due to the turning error is provided. It is economical because there is no need to use an output drive source.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the invention thereto, but are merely illustrative examples unless otherwise specified. Not just.

FIG. 1 is a sectional view of a main part showing a schematic structure according to an embodiment of the present invention, FIG. 2 is a view taken along the line AA in FIG. 1, and FIG. FIG.

As shown in FIG. 1, a scroll fluid machine 1 according to the present invention is provided with a fixed scroll 11, a fixed scroll housing 13 mounted on an upper portion thereof, and an orbit connected to a drive shaft 3 of a motor 2 in an internal space thereof. The fixed scroll 11 and the housing 13 and the orbiting scroll 12 are formed of a metal member such as aluminum.

The fixed scroll 11 is formed in a conical shape having a triangular cross section as shown in FIG. 3, and has three vertices each having a crank pin 22 of a pin crank mechanism 10 described later, which is a rotation preventing mechanism of the orbiting scroll. (FIG. 1), the size of the hook pin between the crank pin 22 and the inner races of the bearings 8 and 9 is set to be small, and the crank pin 22 is rotatably fitted to the bearings 8 and 9. A smaller diameter opening 11 having a fitting opening 11g and a step for holding the outer ring of the bearing 9
h has been established.

At the center of the sliding surface 11c used as a reference surface of the fixed scroll 11 in assembly, a discharge hole 11d communicating with a discharge port 16 (FIG. 1) for discharging a wrap compressed gas described later is opened. A revolving scroll wrap 11a is implanted on the moving surface 11c in the vicinity of the discharge hole 11d. A tip seal 34 (FIG. 1) having self-lubricating properties is formed at the tip of the wrap 11a so as to form a sealed space by slidingly contacting the other sliding surface.

The sliding surface 11c is provided with an opening 11e (FIG. 3) communicating with the gas suction ports 15, 15 (FIG. 2). A number of cooling and reinforcing fins 11b (FIG. 2) are implanted on the outer bottom surface 11i of the fixed scroll 11.

A base 13a having the same cross-sectional outer shape as the fixed scroll 11 is provided above the fixed scroll 11.
Is fixed with a screw. A space 13b is provided in the base 13a,
An opening 13f is opened in the space 13b, so that the outside air can flow freely. Further, a continuous portion 13d having a space 13c smaller than 13b is provided at an upper portion of the space 13b, and a motor 2 having a drive shaft 3 is provided at an upper portion thereof.

Empty space 13 of fixed scroll housing 13
b, the orbiting scroll 12 on which the orbiting scroll wrap 12a having a plane facing the wall surface of the fixed scroll wrap 11a is provided. The fixed scroll housing 13 is provided on a sliding surface 12e, which is rotatably connected to the sliding surface 12e and is located near the outer periphery opposite to the wrap surface.
The dust seal 36 having self-lubricating property disposed in the sliding portion 13e is slidably slidable.

A plurality of cooling fins 12b are provided upright on the surface opposite to the orbiting scroll wrap surface so that the orbiting scroll can be cooled by the outside air flowing from the opening 13f of the housing 13. A tip seal 35 having a self-lubricating property for forming a closed space by slidingly contacting the sliding surface of the counterpart scroll is disposed at the tip of the orbiting scroll wrap 12a.

At the position of the orbiting scroll 12 corresponding to the opening 11g of the fixed scroll 11, three opening holes 12 are provided.
g, and bearings 6 and 7 are provided in the opening 12g.
The crankpin 21 is inserted into the inner ring of these bearings, and two O-rings 23 and 24 are inserted into grooves provided on the outer periphery of the crankpin 21. The pin 21 is configured to be swingable in the radial direction.

The crank pin 21 is implanted on the crank plate 17 via a spacer 18, a spring washer 32 is interposed between the spacer 18 and the bearing 7, and a screw is provided on the upper surface of the bearing 6 via a holding plate 19. 37 prevents the bearing 6 from being separated from the crankpin 21 and allows the relative position between the crankpin 21 and the bearing 6 to be adjusted and regulated, so that there is play between the bearing and the crank plate. To eliminate backlash.

Further, since the inner ring is of the O-ring type, the tip clearance between the fixed scroll and the orbiting scroll and the counterpart mirror surface can be adjusted by adjusting the relative position between the crankpin 21 and the bearing 6.

The crank pin 2 of the crank plate 17
A crank pin 22 having an axis is implanted on a side opposite to the axis 1 at a distance p from the axis of the crank pin 21, and the crank pin 22 is fitted into an opening hole 11 g of the fixed scroll 11. The bearings 8 and 9 are inserted into inner rings.

The crank pin 22 has a spring washer 33 interposed between the crank plate 17 and the bearing 8, and the upper and lower surfaces of the bearing 9 are separated from the upper and lower bearings by screws 38 via the holding plate 20. I have.

Next, the operation of the thus-configured scroll fluid machine according to the present embodiment will be described. In FIG. 1, when the motor 2 rotates and the orbiting scroll 12 starts the orbiting motion, the fluid taken in from the tips of the wraps 11a and 12a is a crescent-shaped closed space formed by the wraps 12a and 11a, respectively. And is discharged to the discharge port 16 from the discharge hole 11d opened in the center portion.

In the process, the high heat generated by being compressed by the closed space causes the cooling fins 12b provided on the back of the orbiting scroll 12 to be cooled by the fins rotating and disturbing the air flowing from the opening 13f. Is done. The high heat is cooled by the cooling fins 11b of the fixed scroll 11.

In the manufacturing and assembling process, if an interfering portion occurs between the driving portion and the fixed portion due to the accumulated error due to the combination of the orbiting scroll and the fixed scroll housing, the force in the direction in which the laps collide with each other is applied to the crank pin 21. And 22 are absorbed by the deformation of the O-ring. Then, as shown in FIG. 1, the deformation of the O-rings 23 and 24 of the crankpin 21 absorbs the turning error due to the accumulated error.

Therefore, the lap wall surfaces do not rub against each other with a large force, and the crank pin does not directly rub against the wall surface of the inner ring of the bearing. The drive mechanism between the two scrolls absorbs the turning error in the driving, so that the fretting phenomenon between the two scrolls, that is, the occurrence of the fretting phenomenon on both the lap wall surfaces or the sliding contact surface of the pin crank mechanism is generated. It is economical because there is no need to use a high-output drive source that is suppressed, has good durability, and covers the load due to the turning error.

4 to 11 show another embodiment according to the present invention. FIG. 4 shows that the bearings 8 and 9 are fitted into the opening holes of the fixed scroll 11, and the dimensions of the hook pin between the crank pin 22 and the inner rings of the bearings 8 and 9 are set small. Insert rotatably.

Further, the dimension of the opening between the opening of the orbiting scroll and the outer diameters of the bearings 6 and 7 is set loose enough to absorb the accumulated error between the orbiting scroll and the fixed scroll member. O-rings 25 and 26 are inserted into the grooves, and the bearings 6 and 7 are swingably inserted into the opening holes of the orbiting scroll via the O-rings 25 and 26. In addition, the dimensions of the eyelashes between the crankpin 21 and the inner races of the bearings 6 and 7 are set loose enough to absorb the accumulated error between the orbiting scroll and the fixed scroll member. Two O-rings 23 and 24 are inserted into grooves provided on the outer periphery of the crankpin 21, and the crankpin 21 is inserted in the bearing.
Are configured to be swingable in the radial direction.

With this configuration, the pin crank mechanism shown in FIG.
6, it is possible to secure a larger swing amount, and it is possible to absorb a drive turning error between both scrolls.

FIG. 5 shows that the bearings 8 and 9 are fitted into the opening of the fixed scroll 11 and the crank pin 2
2 and the inner diameter of the bearings 8 and 9 are set loose enough to absorb the accumulated error between the orbiting scroll and the fixed scroll member, and a crank pin 22 is inserted into the inner rings of the bearings 8 and 9. Two O-rings 27 are provided in a groove provided on the outer periphery of the crank pin 22,
The crank pin 22 is configured to be able to swing in the radial direction in the bearing.

Further, the bearings 6 and 7 are fitted into the opening holes of the orbiting scroll, and the dimensions of the crank pin 21 and the inner ring of the bearings 6 and 7 are adjusted so that the accumulated error between the orbiting scroll and the fixed scroll member can be absorbed. The crank pins 21 are inserted into the inner rings of the bearings 6 and 7, and two O-rings 23 and 24 are inserted into grooves provided on the outer periphery of the crank pins 21. Inside the crank pin 21
Are configured to be swingable in the radial direction.

With this configuration, the pin crank mechanism shown in FIG.
8, it is possible to secure a larger swing amount, and it is possible to absorb a drive turning error between the two scrolls.

FIG. 6 shows that the size of the opening between the opening of the fixed scroll housing and the outer diameter of the bearings 8 and 9 is set loose enough to absorb the accumulated error between the orbiting scroll and the fixed scroll member. The O-rings 29 and 30 are inserted into the grooves, and the bearings 8 and 9 are swingably inserted into the openings of the fixed scroll via the O-rings 29 and 30. In addition, the dimensions of the hook pin between the crank pin 22 and the inner rings of the bearings 8 and 9 are set to be small, and the inner
2 is rotatably inserted.

The size of the opening between the opening of the orbiting scroll and the outer diameter of the bearings 6 and 7 is set to be small enough to absorb the accumulated error between the orbiting scroll and the fixed scroll member. O-rings 25 and 26 are inserted into the grooves, and the bearings 6 and 7 are swingably inserted into the opening holes of the orbiting scroll via the O-rings 25 and 26. In addition, the dimension of the eyelash between the crankpin 21 and the inner rings of the bearings 6 and 7 is set to be small, and the crankpin 21 is rotatably inserted into the inner rings of the bearings 6 and 7.

With this configuration, the pin crank mechanism shown in FIG.
With 0, a larger swing amount can be ensured, and a driving turning error between the two scrolls can be absorbed.

FIG. 7 shows that the bearings 8 and 9 are fitted into the opening holes of the fixed scroll housing 11 and that the accumulated error between the crank pin 22 and the inner rings of the bearings 8 and 9 is reduced by the cumulative error between the orbiting scroll and the fixed scroll member. The crank pins 22 are inserted into the inner rings of the bearings 8 and 9, and two O-rings 27 and 28 are inserted into grooves provided on the outer periphery of the crank pins 22. The crank pin 22 is configured to be able to swing in the radial direction in the bearing.

A groove is provided in the opening of the orbiting scroll, and O-rings 25 and 26 are inserted into the groove. Bearings 6 and 7 are connected to the opening of the orbiting scroll through O-rings 25 and 26. The crank pins 21 are inserted into the inner rings of the bearings 6 and 7, and two O-rings 23 and 24 are provided in grooves provided on the outer periphery of the crank pins 21. The crank pin 21 is configured to be able to swing in the radial direction within the bearing.

With this configuration, the pin crank mechanism shown in FIG. 7 can set the O-ring 2 by appropriately setting the dimensions of the opening of the orbiting scroll and the outer ring of the bearing, and the inner diameter of the bearing inner ring and the crankpin.
Operation errors that cannot be absorbed by the O-rings 23, 24, 25, and 26 can be absorbed by the O-rings 23, 24, 25, and 26, and a larger swing amount than that of FIGS. A turning error in driving between scrolls can be absorbed.

FIG. 8 shows that the size of the opening between the opening of the fixed scroll housing and the outer diameter of the bearings 8 and 9 is set loose enough to absorb the accumulated error between the orbiting scroll and the fixed scroll member. The O-rings 29 and 30 are inserted into the grooves, and the bearings 8 and 9 are swingably inserted into the opening holes of the orbiting scroll via the O-rings 29 and 30. In addition, the dimensions of the hook pin between the crank pin 22 and the inner rings of the bearings 8 and 9 are set to be small, and the inner
2 is rotatably inserted.

A groove is provided in the opening of the orbiting scroll, and O-rings 25 and 26 are inserted into the groove, and the bearings 6 and 7 are connected to the opening of the orbiting scroll through the O-rings 25 and 26. The crank pins 21 are inserted into the inner rings of the bearings 6 and 7, and two O-rings 23 and 24 are provided in grooves provided on the outer periphery of the crank pins 21. The crank pin 21 is configured to be able to swing in the radial direction within the bearing.

With this configuration, the pin crank mechanism shown in FIG. 8 can set the O-ring 2 by appropriately setting the dimensions of the opening of the orbiting scroll and the outer ring of the bearing and the inner ring of the bearing and the crank pin.
The turning error which cannot be absorbed by the components 9 and 30 can be absorbed by the O-rings 23, 24, 25 and 26, and a larger swinging amount can be secured than in FIGS. 4, 5 and 6. A turning error in driving between scrolls can be absorbed.

FIG. 9 shows that a groove is provided in the opening of the fixed scroll housing 11, and O-rings 29, 3 are provided in the groove.
0 is inserted and the bearings 8 and 9 are
The crank pin 22 is inserted into the opening of the fixed scroll housing 11 so as to be able to swing through an inner ring 0, and a crank pin 22 is inserted into the inner ring of the bearings 8 and 9 so as to be inserted into a groove provided on the outer periphery of the crank pin 22. Has two O-rings 27,
The crank pin 22 is configured to be swingable in the radial direction in the bearing.

A groove is provided in the opening of the orbiting scroll 12, and O-rings 25 and 26 are inserted into the groove. Bearings 6 and 7 are connected to the orbiting scroll 12 via the O-rings 25 and 26. A crankpin 21 is inserted into the opening of the bearing 6 and 7 so as to be able to swing, and two O-rings 23 are inserted into a groove provided on the outer periphery of the crankpin 21. The crank pin 21 is configured to be able to swing in the radial direction in the bearing.

With such a configuration, the pin crank mechanism shown in FIG. 9 can set the above-mentioned O by appropriately setting the opening holes of the orbiting scroll and the fixed scroll and the outer ring of the bearing and the inner ring of the bearing and the crank pin. Rings 23, 24, 25, 26, 27, 2
8, 29, and 30, it is possible to secure a larger swing amount than the pin crank mechanism shown in FIGS. 4 to 8, and it is possible to absorb a turning error in driving between both scrolls. .

FIG. 10 shows the fixed scroll housing 11.
The bearings 8 and 9 are fitted into the openings of the bearings 8 and 9 and the inner dimensions of the crank pins 22 and the inner rings of the bearings 8 and 9 are set to be small, and the crank pins 22 are rotatably inserted into the inner rings of the bearings 8 and 9. Then, the bearings 6 and 7 are fitted into the opening holes of the orbiting scroll 12, and the dimensions of the crankpin 21 and the inner rings of the bearings 6 and 7 are set to be small, and the crankpin 21 is rotated on the inner rings of the bearings 6 and 7. Insert as possible.

With the pin crank mechanism kept in this configuration, FIG.
When applied to the scroll fluid mechanism described above, the cumulative error between the orbiting scroll and the fixed scroll member causes interference in the operation of the scroll mechanism. Therefore, as shown in FIG. 11, the outer diameter of the drive shaft 4 and the inner diameter of the bearing 5 are set loose enough to absorb the accumulated error between the orbiting scroll and the fixed scroll member. An O-ring 31 is inserted into the groove, and the bearing 5 is swingably inserted into the mounting base of the orbiting scroll via the O-ring 31. With this configuration, accumulated errors due to the orbiting scroll, the fixed scroll member, and the like can be absorbed by the O-ring 31.

In the above-described embodiment, a mechanism for absorbing a displacement in the operation of both scrolls due to a manufacturing and assembling error of the two scrolls is provided by a combination of a crankpin or a drive shaft, a bearing, and an O-ring. Although disclosed, the invention is not necessarily limited to this, and at least one of the scroll mechanisms is directly or indirectly erected on an implant (ie, a crankpin or a drive shaft) via a fluid or magnetic force. Intermediate rotor (ie,
Needless to say, the present invention is also applicable to an absorbing mechanism having a configuration in which a rotating body having a shape of an inner ring or an outer ring of a bearing is floated and the intermediate rotating body slides on a mating sliding surface.

In the above-described embodiment, the O-ring is used. However, the present invention is not limited to this, and it is not limited to this. It may be a thing.

Further, the O-ring,
Needless to say, the number of bearings and the like is not limited to the illustrated example.

The drive shaft 4 and the bearing 5 shown in FIG.
Are not connected via an O-ring, but the drive shaft 4 and the bearing 5 may be connected via an O-ring 31 as shown in FIG.

As described in detail above, in this embodiment, in order to absorb a rotational error in driving between the fixed scroll and the orbiting scroll, the absorbing mechanism is constructed by interposing an elastic member in the rotation preventing mechanism. Since the crank pin on the orbiting scroll side is connected to the bearing via the elastic member and further connected to the orbiting scroll via the bearing, the groove in which the elastic member is interposed is cut on the outer periphery of the crank pin. Because it is possible to adopt a mechanism that only needs to be installed,
Processing and manufacturing are simple.

Further, in this embodiment, an inner ring O-ring system in which an elastic member is interposed between the crankpin and the bearing can be employed, and the crankpin is inserted after the bearing is pressed into the bearing box side. By supporting directly below the cored crank pin from below, the crank pin can be easily and stably pressed into the bearing with a smaller force than pressing the bearing into the bearing box.

Further, in the present embodiment, the inner ring O-ring system can be adopted, and a small O-ring can be used, which is advantageous in cost.

In this embodiment, since the inner ring O-ring system can be adopted, by adjusting the relative position between the crank pin 21 and the bearing 6, the tip of the fixed scroll and the orbiting scroll and the other mirror surface can be adjusted. Adjustment of clearance is possible.

In the present embodiment, the bearing on the orbiting scroll side is further connected to the orbiting scroll via an elastic member, so that the orbiting error of the orbiting scroll is reduced by two elastic members. It will have a wide error absorption range.

In this embodiment, the elastic member is
Since both the fixed scroll side crank pin and the bearing and the fixed scroll are arranged between the bearing and the fixed scroll, the orbiting error of the orbiting scroll has a wide error absorption range by the two elastic members.

Further, in this embodiment, since the elastic member is interposed between the crank pin and the bearing on the orbiting scroll side, the crank mechanism integrated with the crank plate and the crank pin is provided by the elastic force of the elastic member. And the crank mechanism can be attached to the orbiting scroll mechanism at the time of assembling. Therefore, even if the orbiting scroll mechanism is moved even if it is not temporarily tightened with screws or the like, it can be dropped. Operability can be improved.

Also, in this embodiment, the crank mechanism integral with the crank plate and the crank pin is held by the fixed scroll by frictional force by the elastic force of the elastic member, and the crank mechanism is attached to the fixed scroll mechanism at the time of assembly. Therefore, even if the fixed scroll mechanism is not moved even if it is temporarily tightened with a screw or the like, the fixed scroll mechanism does not fall and the workability can be improved.

Further, in this embodiment, an absorbing mechanism for absorbing a rotational error in driving between the fixed scroll and the orbiting scroll is configured by interposing an elastic member in a rotation preventing mechanism of the orbiting scroll, and the absorbing mechanism includes Since a crank pin having a shaft center separated by a predetermined distance is implanted on the front and back surfaces of the crank plate and the crank pin is connected to each of the two scrolls via a bearing and the elastic member, a fretting phenomenon occurs between the two scrolls. Is suppressed, the durability is good, and there is no need to use a drive source with a large output to cover the load due to the turning error, which is economical.

In the present embodiment, since a plurality of bearings are arranged on the crank pin on the orbiting scroll side, the swing of the crank pin in the inclination direction with respect to the rotation center line of the bearing in the assembled state. Is smaller than in the case of one bearing because the crankpin is held at a plurality of positions in the axial direction. Therefore, the dimensional margin in the absorption mechanism is not small, and it is economical to use a small elastic member.

In this embodiment, an absorbing mechanism for absorbing a rotational error in driving between the two scrolls is provided between the orbiting scroll and a drive shaft for driving the orbiting scroll. As shown in FIG. 11, the outer ring of the bearing 5 is fitted into the base of the orbiting scroll as shown in FIG. 11, but the error between the outer diameter of the drive shaft 4 and the inner ring of the bearing 5 can be reduced if necessary. Since the drive shaft 4 is set as loosely as possible, the drive shaft 4 can be easily removed compared to the case where the drive shaft 4 is fitted and fixed to the bearing inner ring, and the operation is easy at the time of assembly or repair. is there.

[0082]

As described above, according to the first aspect of the present invention, an absorbing mechanism for absorbing a turning error between the fixed scroll and the orbiting scroll is configured by interposing an elastic member in the rotation preventing mechanism. The above-mentioned absorption mechanism implants a crankpin having a shaft center separated by a predetermined distance on the front and back surfaces of a crank plate, connects the crankpin to each of the two scrolls via a bearing, and forms a crank on the orbiting scroll side. Since the pin is connected to the bearing via the elastic member, the groove in which the elastic member is interposed may be cut on the outer periphery of the crankpin. And a scroll fluid machine having the same.

Further, since the bearing on the orbiting scroll side is further connected to the orbiting scroll via an elastic member, the orbiting error of the orbiting scroll can be reduced by two points. Since the elastic member has a wide error absorption range, and the elastic member is interposed between the crankpin and the bearing on the orbiting scroll side, the crank mechanism integrated with the crank plate and the crankpin is provided by the elastic member. The orbiting scroll is held by the orbiting scroll with a frictional force by elastic force, and the crank mechanism can be attached to the orbiting scroll mechanism at the time of assembly. Workability can be improved.

According to a third aspect of the present invention, there is provided an absorbing mechanism for absorbing a rotational error in driving between the fixed scroll and the orbiting scroll with an elastic member interposed between the rotation preventing mechanism of the orbiting scroll, The absorption mechanism implants a crankpin having a shaft center separated by a predetermined distance on the front and back of the crank plate, and connects the crankpin to each of the two scrolls via a bearing and the elastic member. The mechanism can absorb a turning error in driving between the two scrolls, suppress the occurrence of fretting phenomenon between the two scrolls, have good durability, and drive a large output that covers the load due to the turning error. There is no need to use a source and it is economical.

Further, according to the present invention, since the elastic member is arranged between the bearing and the crank pin on the orbiting scroll side and between the bearing and the orbiting scroll, the orbiting error of the orbiting scroll is reduced. The two elastic members will have a wide error absorption range,
Since the elastic member is interposed between the crank pin and the bearing on the orbiting scroll side, a crank mechanism integrated with the crank plate and the crank pin is held by the orbiting scroll with a frictional force by the elastic force of the elastic member, Since the crank mechanism can be attached to the orbiting scroll mechanism at the time of assembly, even if the orbiting scroll mechanism is moved even if it is not temporarily tightened with screws or the like, the crank mechanism does not drop and the workability can be improved. .

According to the fifth aspect of the present invention, since a plurality of bearings are arranged on the crank pin on the orbiting scroll side, a plurality of bearings are interposed on the crank pin on the orbiting scroll side. And take
In the assembled state, the swing of the crank pin in the inclination direction with respect to the rotation center line of the bearing is smaller than in the case of one bearing because the crank pin is held at a plurality of positions in the axial direction. Therefore, the dimensional margin in the absorption mechanism is small, and it is economical to use a small elastic member.

According to the sixth aspect of the present invention, since the elastic member is disposed between the fixed scroll side crank pin and the bearing and between the bearing and the fixed scroll, the orbiting error of the orbiting scroll is reduced by two. Will have a wider error absorption range due to the elastic member of the location,
Further, since the elastic member is interposed between the fixed scroll side crank pin and the bearing, the crank mechanism integrated with the crank plate and the crank pin is subjected to frictional force on the fixed scroll by the elastic force of the elastic member. The crank mechanism is held and can be attached to the fixed scroll mechanism at the time of assembling. Therefore, even if the fixed scroll mechanism is not temporarily tightened by screws or the like and moved, the work does not drop, thereby improving workability. be able to.

According to the seventh aspect of the present invention, the absorbing mechanism for absorbing an operation error in driving between the two scrolls is provided between the orbiting scroll and the drive shaft for driving the orbiting scroll. The occurrence of the fretting phenomenon between the two scrolls is suppressed, the durability is good, and there is no need to use a drive source having a large output to cover the load due to the turning error, which is economical.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part showing a schematic configuration according to an embodiment of a scroll fluid machine of the present invention.

FIG. 2 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a schematic structural view showing a second embodiment of the pin crank mechanism.

FIG. 5 is a schematic structural view showing a third embodiment of a pin crank mechanism.

FIG. 6 is a schematic structural view showing a fourth embodiment of a pin crank mechanism.

FIG. 7 is a schematic structural diagram showing a fifth embodiment of the pin crank mechanism.

FIG. 8 is a schematic structural view showing a sixth embodiment of the pin crank mechanism.

FIG. 9 is a schematic structural view showing a seventh embodiment of the pin crank mechanism.

FIG. 10 is a schematic structural view showing an eighth embodiment of a pin crank mechanism.

FIG. 11 is a partial configuration diagram showing another embodiment of the drive shaft mounting portion of the orbiting scroll.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Scroll fluid machine 10 Pink rank mechanism (rotation prevention mechanism) 11 Fixed scroll 12 Orbiting scroll 13 Fixed scroll housing 17 Crank plate 21, 22 Crank pin 23-31 O-ring

Claims (7)

[Claims] A plurality of orbiting scroll rotation preventing mechanisms are provided between the fixed scroll and the orbiting scroll for limiting the orbiting of the orbiting scroll and revolving the orbiting scroll with respect to the fixed scroll. A scroll fluid machine having an orbiting scroll rotation preventing mechanism configured to connect and absorb a driving orbiting error between the two scrolls by interposing an elastic member in the rotation preventing mechanism; The mechanism implants a crank pin having a shaft center separated by a predetermined distance on the front and back of the crank plate, connects the crank pin to each of the two scrolls via a bearing, and the crank pin on the orbiting scroll side is The orbiting scroll has a rotation preventing mechanism characterized by being connected to a bearing via an elastic member. Scroll fluid machinery. 2. The bearing on the orbiting scroll side,
3. The scroll fluid machine according to claim 1, further comprising an orbiting scroll connected to the orbiting scroll via an elastic member. 3. A plurality of orbiting scroll rotation preventing mechanisms for restricting the orbiting of the orbiting scroll with respect to the fixed scroll and revolving the orbiting scroll are provided between the fixed scroll and the orbiting scroll. A scroll fluid machine having an orbiting scroll rotation preventing mechanism configured to connect and absorb a driving orbiting error between the two scrolls by interposing an elastic member in the rotation preventing mechanism; The mechanism is characterized in that a crank pin having a shaft center separated by a predetermined distance is implanted on the front and back surfaces of the crank plate, and the crank pin is connected to each of the two scrolls via a bearing and the elastic member. Scroll fluid machine having an orbiting scroll rotation preventing mechanism. 4. The scroll fluid according to claim 3, wherein the elastic member is disposed between the crank pin and the bearing on the orbiting scroll side and between the bearing and the orbiting scroll. machine. 5. The scroll fluid machine according to claim 3, wherein a plurality of bearings are arranged on the crank pin on the orbiting scroll side. 6. The scroll fluid according to claim 3, wherein the elastic member is disposed between the crank pin on the fixed scroll side and the bearing and between the bearing and the fixed scroll. machine. 7. A scroll fluid machine having an orbiting scroll rotation preventing mechanism for restricting the orbiting of the orbiting scroll with respect to the fixed scroll and revolving the orbiting scroll, wherein a plurality of portions are provided between the fixed scroll and the orbiting scroll. And an absorbing mechanism for absorbing a rotational error in driving between the two scrolls is disposed between the orbiting scroll and a drive shaft for driving the orbiting scroll. A scroll fluid machine having an orbiting scroll rotation preventing mechanism, characterized in that: