JP2010053696A - Driven scroll and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a driven scroll having a structure for easily forming the driven scroll and a method for manufacturing the same. <P>SOLUTION: The invention relates to the driven scroll integrally formed with an outer peripheral annular block part being a cylindrical shape having a predetermined height corresponding to a part between end plates of a driving scroll, a connecting part positioned in the center, and a spiral driven scroll wrap for connecting a part between the outer peripheral annular block part and the connecting part. A driven scroll block for forming a clearance hole extending in a forming range of a peripheral groove part is formed outward in the radial direction in an outer peripheral side end part of an insertion space. By forming the peripheral groove part of the predetermined depth so that the clearance hole is opened on an outer peripheral side surface of the outer peripheral annular block part, a suction hole of the driven scroll is opened in the peripheral groove part by penetrating in the radial direction through the outer peripheral annular block part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is slidably held between the end plates of the drive scroll and rotates in a compression space defined between the drive scroll and the drive scroll in synchronization with the rotation of the drive scroll. The present invention relates to a driven scroll that performs a turning motion and a manufacturing method thereof.

  Patent Document 1 discloses a housing, a drive scroll unit that is rotatable in the housing, and rotates with the rotation of the first scroll unit (drive scroll unit) and pivots relative to the drive scroll unit. Disclosed is a scroll fluid machine that includes a second scroll unit (driven scroll unit) that moves, and performs suction and discharge by changing the volume of a compression space defined by the drive scroll unit and the driven scroll unit.

Similarly, in Patent Document 2, a driving scroll and a driven scroll are rotatably supported in a cylindrical housing closed at both ends in the axial direction, an intake port is provided on the outer peripheral surface of the housing, and a shaft of the housing is provided. A discharge port is provided at the end of the direction, and a spiral drive wrap portion is formed on the drive scroll, and a spiral follower lap portion is formed on the driven scroll, and the drive wrap portion and the driven lap portion are connected to each other. Engaging with each other and rotating the drive scroll with respect to the driven scroll, moving the compression chamber formed between the drive lap portion and the driven lap portion from the radially outer side to the inner side while compressing, A scroll compressor that takes in outside air from the intake port and discharges outside air compressed in the compression chamber from the discharge port; Shimesuru.
JP 2007-23776 A JP 2008-184945 A

  In the scroll fluid machine disclosed in Patent Documents 1 and 2 described above, the driven scroll has a substantially cylindrical shape having a predetermined height corresponding to between the end plates of the drive scroll, and is connected to the center from the outer peripheral annular block. A driven scroll wrap extending in a spiral toward the part, and thereby, the driven scroll wrap and the outer peripheral annular block define an insertion space for the driving scroll wrap. Has a structure having a circumferential groove formed by grooving of a predetermined depth on the circumferential surface of the cylinder.

  In order to form a driven scroll having such a structure, the outer peripheral annular block, the driven scroll wrap, and a cylindrical block having a connecting portion are formed by molding or the like, and a groove is formed on the outer peripheral side surface of the cylindrical block. And a suction port for communicating the circumferential groove and the insertion space is formed by an end mill. At present, it is demanded to reduce the cost of the scroll fluid machine, and simplification of production is demanded.

  For this reason, this invention is providing the driven scroll which has the structure which forms a driven scroll easily, and its manufacturing method.

  Therefore, the present invention has a cylindrical shape having a predetermined height corresponding to the end plate of the drive scroll, and includes an outer peripheral annular block portion, a connecting portion located in the center, the outer peripheral annular block portion, and the connecting portion. A spiral driven scroll wrap that connects the outer peripheral annular block portion and a circumferential groove formed along the outer peripheral surface of the outer peripheral annular block portion, the driven scroll wrap, the coupling portion, and the outer periphery An annular block portion inserts a drive scroll wrap of the spiral drive scroll to define an insertion space that forms a compression space, and further, a suction hole that communicates the insertion space with the outside of the circumferential groove portion is formed. In the driven scroll, a suction hole of the driven scroll is formed in the peripheral groove portion through the outer peripheral annular block portion in the radial direction.

  Further, the driven scroll according to the present invention includes the outer peripheral annular block portion, the connecting portion, and the driven scroll wrap, and the outer peripheral side end portion of the insertion space is within a range in which the peripheral groove portion is formed radially outward. It is desirable to form a driven scroll block having a relief hole extending in a circumferential direction, and to form a peripheral groove portion of a predetermined depth on the outer peripheral side surface of the outer peripheral annular block portion so that the escape hole opens.

  As a result, the suction hole of the driven scroll passes through the outer peripheral annular block portion in the radial direction and opens into the peripheral groove portion, so that the driven scroll wrap is formed before the peripheral groove portion is formed (in the insertion space). Since a relief hole extending in the radial direction is formed at the outer peripheral end of the insertion space at the same time, the suction hole can be opened in the peripheral groove at the same time as the peripheral groove is formed. It can be simplified and cost reduction can be achieved.

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

  As a scroll fluid machine provided with a driven scroll according to the present invention, for example, there is a scroll compressor 1 shown in FIG. The scroll compressor 1 includes a motor 2 as a drive source, a housing 4 in which the motor 2 is mounted and defining a storage space 3 inside, and a drive scroll unit disposed in the storage space 3 in the housing 4. 5, an oil seal having a driven scroll unit 7 meshing with the drive scroll unit 5 to define a compression space 6, and a discharge opening 8 formed in the drive scroll unit 5 and a blow-off opening 9 connected to the outside. And at least block 11.

  The housing 4 has a coupling storage chamber 20 which is defined by the motor 2 being mounted. A coupling 22 provided at the tip of the drive shaft 21 of the motor 2 is stored in the coupling storage chamber 20. In addition, an air introduction hole 23 is formed for communicating the coupling storage chamber 20 and the outside air (outside of the housing 4). Further, a through hole 24 having a predetermined size is formed between the coupling storage chamber 20 and the storage space 3. The size of the through hole 24 may be set so as to have a throttling effect on the pulsating sound. The housing 4 rotatably holds the first drive shaft 51 of the drive scroll unit 5 connected to the drive shaft 21 of the motor 2 through the coupling 22.

  The scroll unit is composed of a drive scroll unit 5 and a driven scroll unit 7.

  The drive scroll unit 5 is rotatably arranged in the storage space 3 in the housing 4 and has a first end plate 52 integrally including a first drive shaft 51 connected to the drive shaft 21 of the motor 2; At least two drive scroll wraps 53 extending from the first end plate 52 in the axial direction of the drive shaft 51 and spirally extending along the surface of the first end plate 52, and the first The drive scroll wrap 53 is clamped and fixed together with the end plate 52 and the second end plate 55 is integrally formed with the second drive shaft 54.

  The driven scroll unit 7 includes a driven scroll 72 and a driven scroll receiver 73. 2 (a) and 2 (b), the driven scroll 72 includes an outer peripheral annular block portion 79, a connecting portion 74 located in the center, the outer peripheral annular block portion 79, and the connecting portion 74. An insertion space 70 is defined by the outer peripheral annular block portion 79, the connecting portion 74, and the driven scroll wrap 71. Further, the driven scroll receiver 73 supports the driven scroll 72 rotatably with respect to the housing 4.

  Further, a suction hole 76 communicating with the storage space 3 and the insertion space 70 is formed at the outer peripheral end of the insertion space 70 of the driven scroll 7 so as to extend radially outward. A discharge groove 75 that communicates with the discharge hole 8 is formed in the connecting portion 74 at the center of the discharge port 75. Further, a peripheral groove 77 having a predetermined depth is formed on the outer peripheral side surface of the outer peripheral annular block 79, and the suction hole 76 opens into the peripheral groove 77. As a result, a fluid, for example, air is sucked from the suction hole 76 formed in the outer peripheral portion and discharged from the central discharge hole 8.

  In this embodiment, the Oldham mechanism 10 is provided between the outer surface of the first end plate 52 of the drive scroll unit 5 and the driven scroll receiver 73 of the driven scroll unit 7, and the passive scroll unit 7. Is configured to efficiently perform synchronous rotational motion with respect to the drive scroll unit 5, but there is a case where an Oldham mechanism is not particularly provided.

  The driven scroll 72 used in the scroll compressor 1 having the structure described above has a structure having a suction hole 76 that penetrates the outer peripheral annular block portion 79 in the radial direction, and can be manufactured by the following method.

  When the driven scroll 72 is formed of a plastic material, it is formed by injection molding or extrusion molding, and when it is formed of metal, the outer peripheral annular block portion 79, the connecting portion is formed by laser processing, press processing, casting, forging, or the like. 74 (including the discharge groove 75) and the driven scroll wrap 71 are integrally formed, and at the outer peripheral side end portion of the insertion space 70, a relief hole extending radially outward in the formation range of the peripheral groove portion 77. A driven scroll block 78 is formed.

  A circumferential groove 77 having a predetermined depth is formed on the outer peripheral side surface of the outer peripheral annular block 79 of the driven scroll block by turning or the like so that the escape hole 78 is opened. The outer peripheral annular block 79 is formed with a plurality of screw holes 80 for fixing the driven scroll receiver 73.

  As a result, the suction holes 76 can be easily formed, so that cost reduction can be achieved.

It is a schematic block diagram of the scroll fluid machine in which the driven scroll which concerns on this invention is used. (A) is sectional drawing of the driven scroll which concerns on this invention, (b) is a top view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Scroll compressor 2 Motor 3 Storage space 4 Housing 5 Drive scroll unit 6 Compression space 7 Driven scroll unit 8 Discharge hole 9 Outlet 10 Oldham mechanism 11 Oil seal block 20 Coupling storage chamber 21 Drive shaft 22 Coupling 23 Air introduction Hole 24 Through-hole 51 First drive shaft 52 First end plate 53 Drive scroll wrap 54 Second drive shaft 55 Second end plate 70 Insertion space 71 Driven scroll wrap 72 Driven scroll 73 Driven scroll receiver 74 Connecting portion 75 Discharge groove 76 Suction hole 77 Circumferential groove part 78 Relief hole 79 Peripheral annular block part 80 Screw hole

Claims (2)

A cylindrical shape having a predetermined height corresponding to an end plate of the drive scroll, and an outer peripheral annular block portion, a connecting portion located in the center, and a spiral connecting the outer peripheral annular block portion and the connecting portion. Is formed integrally with the outer peripheral annular block portion, and has a circumferential groove portion formed along the outer peripheral surface of the outer peripheral annular block portion, and is spirally formed by the driven scroll wrap, the connecting portion and the outer peripheral annular block portion. In the driven scroll in which the drive scroll wrap of the drive scroll is inserted to define an insertion space that forms a compression space, and a suction hole that communicates the insertion space and the outside of the circumferential groove portion is formed.
The driven scroll is characterized in that a suction hole of the driven scroll passes through the outer peripheral annular block portion in the radial direction and opens into the peripheral groove portion. A follower comprising the outer peripheral annular block portion, the connecting portion, and the driven scroll wrap, and having a relief hole extending radially outwardly within the formation range of the peripheral groove portion at an outer peripheral side end portion of the insertion space. Form a scroll block,
2. The method of manufacturing a driven scroll according to claim 1, wherein a peripheral groove portion having a predetermined depth is formed on the outer peripheral side surface of the outer peripheral annular block portion so as to open the escape hole.

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