JPWO2018116685A1 - Scroll compressor - Google Patents

Abstract

A pin ring mechanism (26) is provided to support the drive side scroll member and the driven side scroll member so as to relatively revolve. The pin ring mechanism (26) includes a pin member (30), an inner ring (34b) that contacts the pin member (30), a plurality of balls (34c) that roll with respect to the inner ring (34b), and a retainer (34d). A ring member (34) having an inner ring (34b) disposed on the inner periphery of the inner ring (34b) and receiving a component in the circumferential direction of the inner ring (34b) from the pin member (30) and rotating together with the inner ring (34b) It has.

Description

  The present invention relates to a scroll compressor.

  Conventionally, a double-rotating scroll compressor has been known as one form of a scroll compressor (see Patent Document 1). This comprises a drive-side scroll and a driven-side scroll that rotates synchronously with the drive-side scroll, and the driven shaft that supports the rotation of the driven-side scroll is divided by a turning radius relative to the drive shaft that rotates the drive-side scroll. The drive shaft and the driven shaft are rotated at the same angular velocity in the same direction with an offset of only. A synchronous drive mechanism is provided that transmits drive force from the drive-side scroll member to the driven-side scroll member so that the drive-side scroll member and the driven-side scroll member rotate in the same direction at the same angular velocity.

Japanese Patent No. 4556183

When a pin ring mechanism having a pin member and a ring member is employed as the synchronous drive mechanism and the ring member is a rolling bearing, there are the following problems.
10A and 10B show a case where six pin ring mechanisms 26 are arranged. Transmission of power between the pin member 30 and the ring member 34 is shared by each pin ring mechanism 26 for each angle range. When there are six pin ring mechanisms 26, each pin ring mechanism 26 shares power transmission by 60 ° (= 360 ° ÷ 6). For example, in the case of FIG. 10A, the pin ring mechanism 26-1 in the lower left in FIG. 10 shares power transmission, and when each scroll member rotates by a predetermined angle, the position of FIG. The power transmission is transferred to the adjacent pin ring mechanism 26-2. At this time, if the ring member 34 is a rolling bearing, when the pin member 30 and the inner ring of the ring member 34 come into contact with each other, only the rolling element corresponding to the position is urged to roll. The moving object tries to remain stationary. Thereby, rolling of the rolling element corresponding to the position in contact with the pin member 30 is hindered, and a load is applied to the retainer that holds each rolling element, and the retainer may be damaged.

  When a pin ring mechanism having a pin member and a ring member is employed as the synchronous drive mechanism, the pin member is fixed in a stationary state by being press-fitted into the scroll member. For this reason, when the pin member transmits power, there is a problem that wear occurs between the pin member and the mating member in contact with the pin member, and the life of the synchronous drive mechanism is reduced.

  This invention is made in view of such a situation, Comprising: It aims at providing the scroll compressor provided with the synchronous drive mechanism made into the rolling bearing which can reduce the load added to a retainer. To do.

  Another object of the present invention is to provide a scroll compressor provided with a synchronous drive mechanism that can reduce a decrease in life due to contact with a pin member.

In order to solve the above problems, the scroll compressor of the present invention employs the following means.
That is, the scroll compressor according to one aspect of the present invention includes a first scroll member having a spiral first wall disposed on the first end plate, and a first scroll member disposed on the second end plate. A second scroll member having a second wall corresponding to the body, and forming a compression space by meshing the second wall with the first wall, and the first scroll member and the first scroll member. A synchronous drive mechanism that supports the two scroll members so as to perform a revolving orbiting relative to each other, and the synchronous drive mechanism is fixed to the first wall body and / or the second wall body and faces the first wall. A pin member protruding toward the two end plates and / or the first end plate, an inner ring fixed to the first end plate and / or the second end plate, and in contact with the pin member; A plurality of rolling elements that roll and a relative position of each of the rolling elements is maintained. A ring member having a retainer, and an intermediate member for transmitting circumferential force from the pin member relative to the inner ring.

The first wall body disposed on the first end plate of the first scroll member and the corresponding second wall body of the second scroll member are engaged with each other. A synchronous drive mechanism is provided between the first scroll member and the second scroll member so that the scroll members relatively revolve. Thereby, compression is performed by reducing the compression space formed between the 1st scroll member and the 2nd scroll member with revolution revolution motion.
The synchronous drive mechanism is composed of a pin member and a ring member. The ring member is a rolling bearing having an inner ring, a plurality of rolling elements that roll with respect to the inner ring, and a retainer that holds the relative position of each rolling element. Furthermore, the ring member includes an intermediate member that transmits a circumferential force to the inner ring from the pin member. Each of the rolling elements can be rolled by the intermediate member rotating the inner ring. Thereby, when a pin member and an inner ring contact, only the rolling element corresponding to the position rolls, the state where other rolling elements try to keep a stationary state can be avoided, and a rolling element is held. Retainer breakage can be avoided.
As the scroll compressor, for example, a fixed orbiting scroll compressor in which one scroll member is a fixed scroll and the other scroll member is a orbiting scroll, or both scroll members are in the same direction, respectively. A double-rotation scroll compressor that rotates at the same angular velocity is mentioned.

  Furthermore, in the scroll compressor according to one aspect of the present invention, the intermediate member is disposed on the inner periphery of the inner ring and rotates together with the inner ring.

  By providing an intermediate member that is arranged on the inner circumference of the inner ring and rotates together with the inner ring, the inner ring is always rotated by receiving a force from the pin member.

  Furthermore, in the scroll compressor according to one aspect of the present invention, the intermediate member has a substantially disc shape formed so as to contact the inner periphery of the inner ring, and the pin is located at a position corresponding to the pin member. A notch having a gap between the members is provided.

  By making the intermediate member into a substantially disc shape formed so as to be in contact with the inner periphery of the inner ring, the load transmitted to and from the pin member can be smoothly transmitted to the inner ring. And since the notch which has a clearance gap between pin members in the position corresponding to a pin member is provided in the intermediate member, the movement of a pin member is not restrained more than necessary, and synchronous drive The function as a mechanism can be exhibited effectively.

  Furthermore, in the scroll compressor according to one aspect of the present invention, the intermediate member is an elastic member provided on the outer periphery of the pin member.

By providing an elastic member as an intermediate member on the outer periphery of the pin member, the inner ring is rotated by receiving a force from the pin member. Preferably, the elastic member is always in contact with the inner ring so that the inner ring is always rotated.
Moreover, the impact when the pin member and the inner ring come into contact with each other can be reduced by the elastic member, and noise can be reduced.
For example, an O-ring can be used as the elastic member.

  Furthermore, in the scroll compressor according to one aspect of the present invention, the elastic member is disposed at a central position in the axial direction of the inner ring.

  By disposing the elastic member at an intermediate position in the axial direction of the inner ring, the posture of the inner ring can be prevented from being inclined with respect to the axial direction when a force is transmitted to the inner ring.

  Furthermore, in the scroll compressor according to an aspect of the present invention, the pin member is disposed between the pin member and the first wall body and / or the second wall body to which the pin member is fixed. Rolling bearings are provided that are rotatably supported.

  Between the pin member and the wall body to which the pin member is fixed, a rolling bearing that supports the pin member so as to be rotatable around the axis is provided. As a result, when the pin member comes into contact with the intermediate member, the pin member rotates about the axis, so that wear due to friction between the pin member and the intermediate member is reduced, and the life of the synchronous drive mechanism is extended. Can be planned.

  Furthermore, in the scroll compressor according to one aspect of the present invention, the intermediate member is made of resin, and the pin member is made of metal.

  Since the intermediate member is made of resin, there is a possibility that great wear will occur on the intermediate member when it comes into contact with the pin member made of metal. On the other hand, since the pin member is supported by the rolling bearing as described above to be free to rotate, wear of the intermediate member can be reduced.

  Since the intermediate member rotates each of the rolling elements by rotating the inner ring, the load applied to the retainer can be reduced.

  Since the rolling bearing that supports the pin member so as to be rotatable about the axis is provided, wear due to friction between the pin member and the intermediate member is reduced, and the life of the synchronous drive mechanism can be extended.

1 is a longitudinal sectional view showing a double-rotating scroll compressor according to a first embodiment of the present invention. It is the cross-sectional view which showed the scroll member of FIG. It is the top view which showed the pin ring mechanism. It is the partial expansion longitudinal cross-section which showed the pin ring mechanism periphery. It is the top view which showed the bush. It is the top view which showed the contact state of the pin ring mechanism. It is the elements on larger scale which showed the pin ring mechanism of the double scroll type compressor which concerns on 2nd Embodiment of this invention. It is the top view which showed the pin ring mechanism of FIG. It is the elements on larger scale which showed the surroundings of the pin ring mechanism of the double-rotation scroll type compressor which concerns on 3rd Embodiment of this invention. It is the top view which showed the contact state of the pin ring mechanism. It is the top view which showed the contact state of the pin ring mechanism which the phase advanced only the predetermined angle with respect to FIG. 10A.

[First Embodiment]
A first embodiment according to the present invention will be described below with reference to the drawings.
FIG. 1 shows a longitudinal section of the scroll compressor 1. As shown in FIG. 1, the scroll compressor 1 includes a drive unit 3 and a compression mechanism unit 5 in a housing 9.

The drive unit 3 includes an electric motor 7 accommodated in the small diameter portion 9 a of the housing 9. Radiating fins are provided on the outer periphery of the small diameter portion 9 a of the housing 9. The electric motor 7 includes a stator 11 fixed to the housing 9 side, and a rotor 13 that rotates around the drive-side central axis L <b> 1 inside the stator 11. The rotor 13 is fixed to the outer periphery of the rotating shaft 15.
Both ends of the rotating shaft 15 are supported by bearings 17 and 19. A shaft portion 20a of the drive scroll member 20 is connected to one end (left end in FIG. 1) of the rotary shaft 15. Therefore, the driving side central axis L1 in which the rotating shaft 15 and the driving scroll member 20 rotate coincides.

  The compression mechanism 5 is housed in the large-diameter portion 9b of the housing 9, and is made of a drive scroll member (first scroll member) 20 made of metal and a driven scroll member (second scroll member) 22 made of metal. And.

  The drive scroll member 20 rotates around the drive-side central axis L1 when the rotational drive force from the rotary shaft 15 is transmitted through the shaft portion 20a. The driving scroll member 20 includes an end plate (first end plate) 20b having a disk shape, and a spiral wall body (first wall body) 20c erected in a direction substantially perpendicular to the end plate 20b. I have. As shown in FIG. 2, the spiral wall body 20c has a spiral shape having a winding start portion 20c1 on the center side and a winding end portion 20c2 on the outer peripheral side. The shapes of the inner peripheral surface and the outer peripheral surface of the spiral wall body 20c are formed by, for example, an involute curve. However, the winding start portion 20c1 is formed using various curves.

The driven scroll member 22 includes a disk-shaped end plate (second end plate) 22b, a spiral wall body (second wall body) 22c erected in a direction substantially perpendicular to the end plate 22b, And a shaft portion 22a provided at the center of the end plate 22b.
A bearing 24 is attached to the outer periphery of the shaft portion 22a between the housing 9 and the housing. Thereby, the driven scroll member 22 rotates around the driven side central axis L2. The driving side central axis L1 and the driven side central axis L2 are offset by a predetermined distance ρ, and this predetermined distance ρ is a turning radius when the driving scroll member 20 and the driven scroll member 22 relatively revolve. It becomes.

  The shaft portion 22a has a cylindrical shape, and compressed fluid (for example, air or refrigerant) is discharged through a through hole 22a1 formed on the center side of the shaft portion 22a.

  As shown in FIG. 2, the spiral wall body 22 c has a spiral shape having a winding start portion 22 c 1 on the center side and a winding end portion 22 c 2 on the outer peripheral side. The shape of the inner peripheral surface and the outer peripheral surface of the spiral wall body 22c is formed by, for example, an involute curve so as to mesh with the spiral wall body 20c of the drive scroll member 20. However, the part of the winding start part 22c1 is formed using various curves.

  Between the drive scroll member 20 and the driven scroll member 22, a pin ring mechanism (synchronous drive mechanism) that transmits the power to rotate both the scroll members 20 and 22 synchronously and relatively perform a revolving motion. 26 is provided. Here, to rotate synchronously means to rotate in the same direction, the same angular velocity, and the same phase.

As shown in FIG. 1, the pin ring mechanism 26 is fitted into a pin member 30 fixed to the driven scroll member 22 and a circular groove 32 formed in the end plate 20 b of the drive scroll member 20. And a ring member 34.
The pin member 30 is made of metal and is fixed to the outer peripheral wall portion 22 d of the driven scroll member 22 facing the end plate 20 b of the drive scroll member 20. The pin member 30 is provided so that one end is embedded in the outer peripheral wall portion 22 d and the other end protrudes to the inner peripheral side of the ring member 34.

  The circular groove 32 is a circular groove having an inner diameter corresponding to the outer diameter of the ring member 34, and is a hole penetrating the end plate 20b in this embodiment.

  As shown in FIGS. 3 and 4, the ring member 34 is a ball bearing (rolling bearing), and an outer ring 34 a disposed so that the outer periphery contacts the circular groove 32, and the inner periphery An inner ring 34b arranged so that the side contacts the pin member 30, a plurality of balls (rolling elements) 34c arranged between the outer ring 34a and the inner ring 34b, and a retainer 34d that holds the relative position of each ball 34c, It has.

  A bush (intermediate member) 36 made of resin is fitted on the inner peripheral side of the inner ring 34b. As shown in FIG. 5, the bush 36 has a substantially disk shape. A part of the bush 36 is formed with a notch 36 a that is notched from the outer peripheral side toward the center side. The notch 36a has a shape in which the opening width increases toward the outer peripheral side.

  As shown in FIG. 2, six pairs of the pin member 30, the circular groove 32, and the ring member 34 are provided around the center C <b> 1 of the drive scroll member 20. The number of pairs of the pin member 30, the circular groove 32, and the ring member 34 is six in this embodiment, but may be three or more, and may be four, for example.

  FIG. 6 shows a state where power is transmitted by the six pin ring mechanisms 26. In the figure, power is transmitted through the pin member 30 by the pin ring mechanism 26-1 located at the left end. That is, the outer peripheral surface of the pin member 30 of the pin ring mechanism 26-1 is in contact with the inner peripheral surface of the inner ring 34b, and power is transmitted to the end plate 20b via the balls 34c and the outer ring 34a.

  On the other hand, power transmission is not performed in the five pin ring mechanisms 26 other than the pin ring mechanism 26-1. However, the pin member 30 and the bush 36 are always in contact even when the pin member 30 and the inner ring 34b are not in direct contact. That is, the side surface forming the notch 36 a of the bush 36 is in contact with the outer peripheral surface of the pin member 30. Thereby, a component force in the circumferential direction of the inner ring 34b is applied from the pin member 30, and the bush 36 rotates together with the inner ring 34b. When the inner ring 34b rotates, all the balls 34c roll. That is, even when the pin ring mechanism 26 does not transmit power to the pin member 30, all the balls 34c roll.

The scroll compressor 1 having the above-described configuration operates as follows.
The electric motor 7 is driven by power supplied from a power source (not shown), and the rotor 13 rotates, whereby the rotating shaft 15 rotates around the drive-side central axis L1. The rotational driving force of the rotating shaft 15 is transmitted to the driving scroll member 20 via the shaft portion 20a, and the driving scroll member 20 rotates around the driving side central axis L1. The rotational force of the drive scroll member 20 is transmitted to the driven scroll member 22 by the pin ring mechanism 26. At this time, when the pin member 30 of the pin ring mechanism 26 rotates while contacting along the inner periphery of the ring member 34, the driving scroll member 20 and the driven scroll member 22 relatively revolve.
The compression scroll formed between the spiral wall body 20c of the drive scroll member 20 and the spiral wall body 22c of the driven scroll member 22 by the revolving orbiting movement of the drive scroll member 20 and the driven scroll member 22 relatively. The space is reduced as the space moves from the outer peripheral side to the central side, and the fluid sucked from the outer peripheral side of the scroll members 20 and 22 is compressed. The compressed fluid is discharged to the outside from a through hole 22a1 formed in the shaft portion 22a of the driven scroll member 22.

According to this embodiment, there exist the following effects.
The bush 36 disposed on the inner periphery of the inner ring 34b of the pin ring mechanism 26 is provided. The bush 36 receives a component force in the circumferential direction of the inner ring 34b from the pin member 30 and rotates together with the inner ring 34b. Each of the balls 34c can be rolled by the bush 36 rotating the inner ring 34b. Thereby, when the pin member 30 and the inner ring 34b come into contact with each other, it is possible to avoid a state in which only the ball 34c corresponding to the position rolls and the other ball 34c tries to maintain a stationary state. Therefore, the load applied to the retainer 34d that holds the ball 34c can be reduced, and damage to the retainer 34d can be avoided.

  In addition, by forming the bush 36 in a substantially disc shape formed so as to be in contact with the inner periphery of the inner ring 34b, the load transmitted to and from the pin member 30 can be smoothly transmitted to the inner ring 34b. . And since the notch 36a which has a clearance gap between the pin members 30 in the position corresponding to the pin member 30 is provided in the bush 36, the bush 36 may restrain movement of the pin member 30 more than necessary. Therefore, the function as the synchronous drive mechanism can be effectively exhibited.

[Second Embodiment]
Next, a double-rotation scroll compressor according to a second embodiment of the present invention will be described. Since this embodiment is different from the first embodiment in the pinning mechanism and is otherwise the same, the pinning mechanism will be described below.
As shown in FIGS. 7 and 8, the pin ring mechanism 26 ′ includes an O-ring (intermediate member, elastic member) 38 provided on the outer periphery of the pin member 30. In the present embodiment, the bush 36 described in the first embodiment is not provided.

  The O-ring 38 is provided so as to protrude outward from the outer peripheral surface of the pin member 30 in an unloaded state. Thus, the inner ring 34b is always rotated in contact with the inner circumference of the inner ring 34b even in a no-load state.

  As shown in FIG. 8, when the power is transmitted between the pin member 30 and the inner ring 34b, the power is transmitted by the O-ring 38 being crushed. At this time, it is preferable to determine the outer diameter of the O-ring 38 so that the inner ring 34b and the pin member 30 do not directly contact each other. This is to reduce noise by avoiding contact between metals.

  Further, as shown in FIG. 7, the O-ring 38 is disposed at an intermediate position of the height H in the axial direction of the inner ring 34b (vertical direction in the figure). Accordingly, it is possible to prevent the posture of the inner ring 34b from being inclined with respect to the axial direction when a force is transmitted to the inner ring 34b.

[Third Embodiment]
Next, a double-rotation scroll compressor according to a third embodiment of the present invention will be described. This embodiment is different from each of the above embodiments in the pin fixing structure of the pin ring mechanism. Since the rest is the same, the pinning mechanism will be described below.

  As shown in FIG. 9, the pin member 30 is made of metal, and is fixed to the outer peripheral wall portion 22 d of the driven scroll member 22 facing the end plate 20 b of the driving scroll member 20. One end of the pin member 30 is fixed to the outer peripheral wall portion 22d of the driven scroll member 22 via a ball bearing (rolling bearing) 37 so as to be freely rotatable about the axis. Thus, since the pin member 30 is rotatably supported by the ball bearing 37, even if it contacts with the side wall which forms the notch 36a of the bush 36, it rolls without producing a big friction. .

In the present embodiment, the number of ball bearings 37 is two, but the number may be one or three or more. The other end of the pin member 30 is provided so as to protrude to the inner peripheral side of the ring member 34.
Further, the ball bearing 37 is used as a bearing that freely supports the pin member 30. However, other rolling bearings may be used, for example, a needle bearing (needle roller bearing).

According to this embodiment, there exist the following effects.
A ball bearing 37 that supports the pin member 30 so as to be rotatable around the axis is provided. As a result, when the pin member 30 contacts the bush 36, the pin member 30 rotates about the axis, so that wear due to friction between the pin member 30 and the bush 36 is reduced, and the pin ring mechanism 26 Long life can be achieved.

  Further, since the bush 36 is made of resin, there is a risk that the bush 36 will be greatly worn when it comes into contact with the pin member 30 made of metal. On the other hand, since the pin member 30 is supported by the ball bearing 37 so as to be freely rotatable, the wear of the bush 36 can be reduced.

  In each of the embodiments described above, the pin member 30 of the pin ring mechanism 26, 26 'is provided on the driven scroll member 22 and the ring member 34 is provided on the drive scroll member 20. However, the pin member 30 is provided on the drive scroll. The ring member 34 may be provided on the driven scroll member 22 or may be distributed to the scroll members 20 and 22.

  Moreover, the shape of the notch 36a formed in the bush 36 of the first embodiment and the third embodiment is not limited to these embodiments, and even if the load is not borne, the pin member 30 can be Any shape that contacts the outer peripheral surface may be used.

  Further, not only the double-rotation type scroll compressor 1 as in each embodiment, but also a fixed orbiting scroll compressor in which one scroll member is a fixed scroll and the other scroll member is a orbiting scroll. Can also be applied.

DESCRIPTION OF SYMBOLS 1 Scroll type compressor 3 Drive part 5 Compression mechanism part 7 Electric motor 9 Housing 11 Stator 13 Rotor 15 Rotating shaft 17 Bearing 19 Bearing 20 Drive scroll member (first scroll member)
20a Shaft portion 20b End plate (first end plate)
20c spiral wall (first wall)
20c1 winding start portion 20c2 winding end portion 22 driven scroll member (second scroll member)
22a Shaft portion 22b End plate (second end plate)
22c spiral wall (second wall)
22c1 Winding start portion 22c2 Winding end portion 24 Bearings 26, 26 'Pin ring mechanism (synchronous drive mechanism)
30 Pin member 32 Circular groove 34 Ring member 34a Outer ring 34b Inner ring 34c Ball (rolling element)
34d Retainer 36 Bush (intermediate member)
36a Notch 37 Ball bearing (rolling bearing)
38 O-ring (intermediate member, elastic member)
L1 Drive side center axis L2 Drive side center axis

Claims (7)

A first scroll member having a spiral first wall disposed on the first end plate;
A second end plate disposed on the second end plate and corresponding to the first wall body, the second wall body meshing with the first wall body to form a compression space; A scroll member;
A synchronous drive mechanism that supports the first scroll member and the second scroll member so as to relatively revolve and rotate;
With
The synchronous drive mechanism is fixed to the first wall body and / or the second wall body, and projects toward the second end plate and / or the first end plate facing each other,
An inner ring fixed to the first end plate and / or the second end plate and in contact with the pin member, a plurality of rolling elements that roll with respect to the inner ring, and a retainer that holds a relative position of each of the rolling elements A ring member having
An intermediate member that transmits a circumferential force from the pin member to the inner ring;
Scroll type compressor equipped with.   The scroll compressor according to claim 1, wherein the intermediate member is disposed on an inner periphery of the inner ring and rotates together with the inner ring.   The intermediate member has a substantially disk shape formed so as to be in contact with the inner periphery of the inner ring, and a notch having a gap between the pin member and a position corresponding to the pin member is provided. Item 3. The scroll compressor according to Item 2.   The scroll compressor according to claim 1, wherein the intermediate member is an elastic member provided on an outer periphery of the pin member.   The scroll compressor according to claim 4, wherein the elastic member is disposed at a central position in the axial direction of the inner ring.   A rolling bearing is provided between the pin member and the first wall body and / or the second wall body to which the pin member is fixed to support the pin member so as to be rotatable about an axis. Item 6. The scroll compressor according to any one of Items 1 to 5. The intermediate member is a resin,
The scroll compressor according to claim 6, wherein the pin member is made of metal.

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