JP2019178679A - Scroll type compressor - Google Patents

Abstract

To suppress enlargement of a rotary shaft in a radial direction.SOLUTION: An elastic body 50 comprises an annular flange part 52 protruding in a thickness direction of a spring part 51. Therefore, rigidity in an outer peripheral part of the elastic body 50 is improved. When the elastic body 50 is elastically deformed to be expanded toward a side opposite to a movable-side substrate 17a by press-welding a projected part 17f with the spring part 51, a recover force of the elastic body 50 to recover an original shape acts on a movable scroll 17. Therefore, it is not necessary to sandwich the outer peripheral part of the elastic body 50 by using an outer peripheral wall of a stationary scroll 16 in order to make the recovery force for the elastic body 50 to recover the original shape act on the movable scroll 17 like the prior arts. As a result, the need of a space for disposing the outer peripheral wall of the stationary scroll 16 radially outside of a rotary shaft 12 from an outer peripheral surface 17g of the movable-side substrate 17a is eliminated.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a scroll compressor.

  The scroll compressor includes a fixed side substrate, a fixed scroll having a fixed side spiral wall erected from the fixed side substrate, a movable side substrate facing the fixed side substrate, and the movable side substrate toward the fixed side substrate. A movable scroll having a movable spiral wall that is erected and meshes with the fixed spiral wall. The compression chamber is defined by the fixed substrate and the fixed spiral wall, and the movable substrate and the movable spiral wall. In the scroll compressor, the movable scroll revolves as the rotating shaft rotates, and the fluid sucked into the compression chamber is compressed as the movable scroll revolves.

  Further, a back pressure chamber into which a fluid for urging the movable scroll toward the fixed scroll is introduced is formed in the housing. The scroll compressor includes a partition wall that partitions the back pressure chamber in cooperation with the movable substrate. Then, the movable scroll is biased toward the fixed scroll by the pressure of the fluid introduced into the back pressure chamber (back pressure), the distal end surface of the movable side spiral wall is pressed against the fixed side substrate, and the fixed side spiral wall The front end surface of this is pressed against the movable substrate, and the sealing property of the compression chamber is ensured.

  Also, as shown in FIG. 6, a thin plate-like elastic body 104 that is disposed on the opposite side of the fixed scroll 103 with respect to the movable scroll 102 in the housing 101 and urges the movable scroll 102 toward the fixed scroll 103. For example, Patent Document 1 discloses a scroll compressor 100 including the above. In the scroll compressor 100 of Patent Document 1, the fixed scroll 103 has an outer peripheral wall 103 c that surrounds the outer peripheral surface of the movable substrate 102 a, and the outer peripheral portion of the elastic body 104 is a shaft that supports the rotary shaft 105. It is sandwiched between the support member 106 and the outer peripheral wall 103 c of the fixed scroll 103. In addition, an annular convex portion 102f that is pressed against the elastic body 104 is formed on the movable substrate 102a.

  When the convex portion 102f is pressed against the elastic body 104, the elastic body 104 is elastically deformed so as to swell toward the opposite side of the movable substrate 102a, and the elastic body 104 attempts to return to the original shape. When the restoring force acts on the movable scroll 102, the movable scroll 102 is urged toward the fixed scroll 103. According to this, for example, even when the back pressure in the back pressure chamber 107 is not sufficient, such as when the scroll compressor 100 is started up, the movable scroll 102 is urged by the fixed scroll 103, so that the compression is performed. The sealing property of the chamber 108 is improved.

JP2013-148020A

  By the way, in the scroll type compressor 100 of patent document 1, in order to make the return force which the elastic body 104 tries to return to an original shape act on the movable scroll 102, the outer peripheral part of the elastic body 104 is connected with the shaft support member 106. It is sandwiched between the outer peripheral wall 103 c of the fixed scroll 103. For this reason, the outer peripheral wall 103c of the fixed scroll 103 exists outside the outer peripheral surface of the movable substrate 102a in the radial direction of the rotating shaft 105.

  Here, if the outer peripheral wall 103c of the fixed scroll 103 is thin, the outer peripheral wall 103c of the fixed scroll 103 may not be able to withstand the load in the axial direction of the rotary shaft 105. The outer peripheral wall 103c needs to secure a certain thickness. Therefore, the scroll compressor 100 is arranged in the radial direction of the rotary shaft 105 because a space for arranging the outer peripheral wall 103c of the fixed scroll 103 is required on the outer side in the radial direction of the rotary shaft 105 from the outer peripheral surface of the movable substrate 102a. It will increase in size.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a scroll compressor capable of suppressing an increase in size in the radial direction of a rotating shaft.

  A scroll compressor that solves the above problems includes a cylindrical housing, a rotating shaft that is rotatably supported with respect to the housing, a fixed-side substrate, and a fixed-side spiral wall that is erected from the fixed-side substrate. A fixed scroll that is fixed to the housing, a movable side substrate that faces the fixed side substrate, and a movable that is erected from the movable side substrate toward the fixed side substrate and meshes with the fixed spiral wall A movable scroll having a side spiral wall; a compression chamber defined by the fixed side substrate, the fixed side spiral wall, the movable side substrate, and the movable side spiral wall; and the movable scroll formed in the housing. A back pressure chamber into which a fluid for urging the fixed scroll toward the fixed scroll is introduced; a partition wall that partitions the back pressure chamber in cooperation with the movable side substrate; An elastic body that is disposed so as to be interposed between the movable side substrate and the partition wall and urges the movable scroll toward the fixed scroll, wherein the elastic body Has a thin plate-like spring portion that is pressed by the movable scroll and elastically deforms in the thickness direction, and an annular flange that protrudes in the thickness direction of the spring portion, and the outer peripheral surface of the movable-side substrate and the The outer peripheral edge of the spring portion and the flange portion are opposed to the inner peripheral surface of the housing in the radial direction, and the outer peripheral surface of the movable side substrate and the inner periphery of the housing are viewed from the axial direction of the rotating shaft. Located between the faces.

  According to this, the elastic body protrudes in the thickness direction of the spring portion and has an annular flange portion positioned between the outer peripheral surface of the movable side substrate and the inner peripheral surface of the housing as seen from the axial direction of the rotating shaft. Since it has, the rigidity of the outer peripheral part of an elastic body is increasing. Accordingly, when the movable scroll is pressed against the spring portion and the spring portion is elastically deformed, a return force that causes the spring portion to return to the original shape acts on the movable scroll. Therefore, unlike the prior art, it is not necessary to sandwich the outer peripheral portion of the elastic body using the outer peripheral wall of the fixed scroll in order to apply a restoring force to the movable scroll to return the elastic body to the original shape. As a result, there is no need for a space for disposing the outer peripheral wall of the fixed scroll outside the outer peripheral surface of the movable-side substrate in the radial direction, and in the scroll compressor, the increase in the radial direction of the rotary shaft is suppressed. be able to.

  In the scroll compressor, the flange portion may protrude from the spring portion to the fixed scroll side and be positioned between an outer peripheral surface of the movable side substrate and an inner peripheral surface of the housing.

  According to this, since the collar portion can be positioned in the existing space existing between the outer peripheral surface of the movable side substrate and the inner peripheral surface of the housing, it is necessary to separately provide a space for arranging the collar portion. In addition, the configuration of the scroll compressor can be simplified.

The said scroll type compressor WHEREIN: The said collar part is good to be located in the outermost periphery of the said spring part.
According to this, compared with the case where the collar part is located inside the outermost peripheral edge of the spring part, the size of the movable scroll in the radial direction of the rotating shaft can be increased, and the volume of the compression chamber can be increased. Can be bigger.

  According to this invention, the enlargement in the radial direction of the rotating shaft can be suppressed.

A side sectional view showing a scroll type compressor in an embodiment. Sectional drawing which expands and shows a part of scroll type compressor. The perspective view of an elastic body. Sectional drawing which expands and shows a buttocks periphery. Sectional drawing which expands and shows the collar part periphery in another embodiment. Sectional drawing which expands and shows a part of scroll type compressor in a prior art example.

  Hereinafter, an embodiment embodying a scroll compressor will be described with reference to FIGS. The scroll compressor according to the present embodiment is mounted on a vehicle and used for a vehicle air conditioner.

  As shown in FIG. 1, the scroll compressor 10 includes a cylindrical housing 11, a rotating shaft 12 accommodated in the housing 11, and a compressing unit that compresses a refrigerant that is a fluid by rotating the rotating shaft 12. 13 and an electric motor 14 that drives the compression unit 13.

  The housing 11 is connected to the bottomed cylindrical first housing component 15, the bottomed cylindrical second housing component 20 connected to the first housing component 15, and the second housing component 20. And a third housing component 40 having a bottomed cylindrical shape. The first housing component 15, the second housing component 20, and the third housing component 40 are made of a metal material, for example, aluminum.

  The 1st housing structure 15 has the plate-shaped bottom wall 15a and the surrounding wall 15b extended in a cylinder shape from the outer peripheral part of the bottom wall 15a. The direction in which the axial center of the peripheral wall 15b extends coincides with the direction (axial direction) in which the axis L1 of the rotating shaft 12 extends. The peripheral wall 15b has a large diameter hole 151b and a small diameter hole 152b having an inner diameter smaller than that of the large diameter hole 151b. The direction in which the axial centers of the large diameter hole 151b and the small diameter hole 152b extend coincides with the direction in which the axial center of the peripheral wall 15b extends. The large diameter hole 151b is located on the opposite side of the bottom wall 15a than the small diameter hole 152b. The peripheral wall 15b has an annular step surface 153b that connects the large diameter hole 151b and the small diameter hole 152b. The bottom wall 15a closes the opening of the small diameter hole 152b opposite to the large diameter hole 151b. The compression part 13 is accommodated in the large diameter hole 151 b of the first housing component 15.

  The 3rd housing structure 40 has the plate-shaped bottom wall 40a and the surrounding wall 40b extended in a cylinder shape from the outer peripheral part of the bottom wall 40a. An opening edge 40e on the opposite side of the bottom wall 40a in the peripheral wall 40b of the third housing component 40 and an opening edge 15e on the opposite side of the bottom wall 15a in the peripheral wall 15b of the first housing component 15 are rotation axes. It faces 12 axial directions. The direction (axial direction) in which the axis of the peripheral wall 15b of the first housing component 15 extends coincides with the direction (axial direction) in which the axis of the peripheral wall 40b of the third housing component 40 extends.

  The third housing component 40 is formed with a suction port (not shown). The suction port is connected to an external refrigerant circuit (not shown). A discharge port (not shown) is formed in the first housing component 15. The discharge port is connected to an external refrigerant circuit.

  The electric motor 14 is accommodated in the third housing component 40. The electric motor 14 and the compression unit 13 are arranged side by side in the axial direction of the rotary shaft 12. The electric motor 14 includes a rotor 14a that rotates integrally with the rotary shaft 12, and a cylindrical stator 14b that surrounds the rotor 14a. The stator 14b has a cylindrical stator core 141b fixed to the inner peripheral surface of the peripheral wall 40b of the third housing component 40, and a coil 142b wound around the stator core 141b. Then, electric power controlled by a drive circuit (not shown) is supplied to the coil 142b, whereby the electric motor 14 is driven, and the rotary shaft 12 rotates integrally with the rotor 14a.

  A cylindrical boss portion 40 c projects from the inner surface of the bottom wall 40 a of the third housing component 40. The end of the rotating shaft 12 opposite to the compression portion 13 is inserted into the boss portion 40c. A rolling bearing 40d is provided between the inner peripheral surface of the boss portion 40c and the outer peripheral surface of the end portion of the rotating shaft 12 opposite to the compression portion 13. And the edge part on the opposite side to the compression part 13 in the rotating shaft 12 is rotatably supported by the 3rd housing structure 40 via the rolling bearing 40d.

  As shown in FIG. 2, the compression unit 13 includes a fixed scroll 16 and a movable scroll 17 disposed to face the fixed scroll 16. The fixed scroll 16 is located closer to the bottom wall 15 a than the movable scroll 17 in the axial direction of the rotary shaft 12.

  The fixed scroll 16 includes a disk-shaped fixed side substrate 16a and a fixed side spiral wall 16b erected from the fixed side substrate 16a toward the side opposite to the bottom wall 15a. The movable scroll 17 has a disk-shaped movable side substrate 17a facing the fixed side substrate 16a, and a movable side spiral wall 17b erected from the movable side substrate 17a toward the fixed side substrate 16a. . The fixed-side spiral wall 16b and the movable-side spiral wall 17b are meshed with each other. The distal end surface of the fixed spiral wall 16b is in contact with the movable substrate 17a, and the distal surface of the movable spiral wall 17b is in contact with the fixed substrate 16a. The compression chamber 18 is partitioned by the fixed substrate 16a and the fixed spiral wall 16b, and the movable substrate 17a and the movable spiral wall 17b.

  As shown in FIG. 1, the fixed scroll 16 is fixed to the first housing component 15 by attaching the fixed side substrate 16a to the step surface 153b with a bolt 16c. Therefore, the fixed scroll 16 is fixed to the housing 11.

  As shown in FIG. 2, a discharge port 16h is formed at the center of the fixed substrate 16a. A valve mechanism 16v that opens and closes the discharge port 16h is attached to the end surface 16e of the fixed side substrate 16a opposite to the movable scroll 17. A discharge chamber 19 is formed in the first housing component 15. The discharge chamber 19 is partitioned by the bottom wall 15a, the small diameter hole 152b, and the fixed side substrate 16a. The refrigerant compressed in the compression chamber 18 by the compression unit 13 is discharged into the discharge chamber 19 through the discharge port 16h.

  A cylindrical boss portion 17c protrudes from an end surface 17e of the movable side substrate 17a opposite to the fixed scroll 16. The direction (axial direction) in which the axial center of the boss portion 17 c extends coincides with the axial direction of the rotary shaft 12. A plurality of circular recesses 17h are formed around the boss 17c on the end surface 17e of the movable substrate 17a. The plurality of recesses 17h are arranged at predetermined intervals in the circumferential direction of the rotating shaft 12. An annular ring member 17d is fitted in each recess 17h. The movable substrate 17a has an annular convex portion 17f. The convex portion 17f protrudes from the radially outer portion of the rotating shaft 12 with respect to the plurality of concave portions 17h on the end surface 17e of the movable substrate 17a. The convex portion 17f surrounds the boss portion 17c. Further, the outer peripheral surface 17g of the movable substrate 17a and the inner peripheral surface 15g of the first housing component 15 are opposed to each other in the radial direction.

  The second housing component 20 includes a plate-like bottom wall 21 and a peripheral wall 22 that extends in a cylindrical shape from the outer peripheral portion of the bottom wall 21. The direction in which the axial center of the peripheral wall 22 extends coincides with the axial direction of the rotary shaft 12. Further, the second housing component 20 has an annular flange wall 23 extending from the end of the outer peripheral surface of the peripheral wall 22 on the opposite side to the bottom wall 21 toward the radially outer side of the rotary shaft 12.

  An end surface 23 a on the bottom wall 21 side of the flange wall 23 has an annular first surface 231 a and second surface 232 a extending in the radial direction of the rotating shaft 12. The first surface 231 a is continuous with the outer peripheral surface of the peripheral wall 22 and extends from the end of the outer peripheral surface of the peripheral wall 22 opposite to the bottom wall 21 in the radial direction of the rotary shaft 12. The second surface 232a is disposed on the outer side in the radial direction of the rotating shaft 12 with respect to the first surface 231a and at a position separated from the bottom wall 21 in the axial direction of the rotating shaft 12 with respect to the first surface 231a. The outer peripheral edge on the radially outer side of the rotary shaft 12 on the first surface 231a and the inner peripheral edge on the radially inner side of the rotary shaft 12 on the second surface 232a are connected by an annular step surface 233a extending in the axial direction of the rotary shaft 12. Has been.

  The opening edge 15e of the peripheral wall 15b of the first housing component 15 is in contact with the outer periphery of the end surface 20a of the second housing component 20, and the opening edge 40e of the peripheral wall 40b of the third housing component 40 is The second housing component 20 is in contact with the second surface 232a of the flange wall 23. A motor chamber 40 s in which the electric motor 14 is accommodated is defined by the bottom wall 40 a and the peripheral wall 40 b of the second housing structure 20 and the third housing structure 40. The refrigerant is sucked into the motor chamber 40s from the external refrigerant circuit through the suction port. Therefore, the motor chamber 40s is a suction chamber into which the refrigerant is sucked from the suction port.

  The peripheral wall 22 has a large-diameter recess 24 and a bearing housing recess 25. Further, the bottom wall 21 has a seal member accommodating recess 26 and an insertion hole 27. The axis of the large-diameter recess 24, the axis of the bearing receiving recess 25, the axis of the seal member receiving recess 26, and the axis of the insertion hole 27 coincide with the axis L <b> 1 of the rotary shaft 12. The large-diameter recess 24 is open to the end surface 20 a on the opposite side of the bottom wall 21 in the second housing component 20. The bearing receiving recess 25 is formed on the bottom surface 24 a of the large diameter recess 24. Therefore, the large diameter recess 24 and the bearing receiving recess 25 communicate with each other. The seal member housing recess 26 is formed on the bottom surface 25 a of the bearing housing recess 25. Therefore, the bearing housing recess 25 and the seal member housing recess 26 communicate with each other. The insertion hole 27 is formed in the bottom surface 26 a of the seal member housing recess 26 and penetrates the bottom wall 21. Therefore, the seal member housing recess 26 and the insertion hole 27 communicate with each other.

  The end of the rotating shaft 12 on the compression portion 13 side is inserted into the insertion hole 27 and passes through the seal member accommodation recess 26 and the bearing accommodation recess 25 and protrudes into the large diameter recess 24. An end surface 12 a on the compression shaft 13 side of the rotary shaft 12 is located in the large-diameter recess 24. A bearing 28 is housed in the bearing housing recess 25. The bearing 28 is provided between the outer peripheral surface of the rotating shaft 12 and the inner peripheral surface of the bearing housing recess 25. The bearing 28 is a rolling bearing. The end of the rotating shaft 12 on the compression unit 13 side is rotatably supported by the second housing component 20 via a bearing 28.

  An eccentric shaft 29 that protrudes toward the movable scroll 17 from a position eccentric with respect to the axis L <b> 1 of the rotating shaft 12 is integrally formed on the end surface 12 a of the rotating shaft 12. The axial direction of the eccentric shaft 29 coincides with the axial direction of the rotary shaft 12. The eccentric shaft 29 is inserted into the boss portion 17c.

  A bush 31 with an integrated balance weight 30 is fitted to the outer peripheral surface of the eccentric shaft 29. The balance weight 30 is integrally formed with the bush 31. The balance weight 30 is accommodated in the large-diameter recess 24. The movable scroll 17 is supported by the eccentric shaft 29 via the bush 31 and the rolling bearing 32 so as to be rotatable relative to the eccentric shaft 29.

  In addition, the end surface 20a of the second housing component 20 is formed with a circular recess 20h. The inner peripheral side of the escape recess 20 h is continuous with the large-diameter recess 24. A pin 33 to be inserted into each ring member 17d protrudes around the large-diameter recess 24 in the escape recess 20h.

  The rotation of the rotary shaft 12 is transmitted to the movable scroll 17 via the eccentric shaft 29, the bush 31, and the rolling bearing 32, and the movable scroll 17 rotates. The pins 33 and the inner peripheral surfaces of the ring members 17d come into contact with each other, so that the rotation of the movable scroll 17 is prevented and only the revolving motion of the movable scroll 17 is allowed. Thereby, the movable scroll 17 revolves while the movable spiral wall 17b is in contact with the fixed spiral wall 16b, the volume of the compression chamber 18 is reduced, and the refrigerant is compressed. The balance weight 30 cancels the centrifugal force acting on the movable scroll 17 when the movable scroll 17 revolves, thereby reducing the unbalance amount of the movable scroll 17.

  An introduction chamber 34 for introducing a refrigerant into the compression chamber 18 is formed in the housing 11. The introduction chamber 34 is defined by the outer peripheral surfaces of the fixed side substrate 16 a and the fixed side spiral wall 16 b of the fixed scroll 16, the outer peripheral surface 17 g of the movable side substrate 17 a, and the end surface 20 a of the second housing structure 20. The introduction chamber 34 communicates with the outermost peripheral portion in the compression chamber 18.

  The housing 11 is formed with an introduction passage 35 for introducing the refrigerant in the motor chamber 40 s into the introduction chamber 34. The introduction passage 35 is in communication with the first groove 40 f and the first groove 40 f that are recessed in a part of the inner peripheral surface of the peripheral wall 40 b of the third housing component 40, and the flange wall 23 of the second housing component 20. And a second groove 15f that communicates with the hole 23f and that is recessed in a part of the inner peripheral surface of the peripheral wall 15b of the first housing component 15. The refrigerant in the motor chamber 40 s passes through the introduction passage 35 and the introduction chamber 34 and is sucked into the compression chamber 18.

  A back pressure chamber 36 is formed in the housing 11. The back pressure chamber 36 is partitioned by the end surface 17 e of the movable side substrate 17 a and the large-diameter recess 24 of the second housing component 20. Therefore, the back pressure chamber 36 is formed at a position opposite to the movable side substrate 17a in the housing 11 from the fixed side substrate 16a side. The second housing component 20 functions as a partition wall that partitions the back pressure chamber 36 in cooperation with the movable substrate 17a. The second housing component 20 also functions as a partition wall that partitions the back pressure chamber 36 and the motor chamber 40s that is a suction chamber.

  The movable scroll 17 is formed with a back pressure introduction passage 37 that penetrates both the movable substrate 17 a and the movable spiral wall 17 b and introduces the refrigerant in the compression chamber 18 into the back pressure chamber 36. The back pressure chamber 36 has a higher pressure than the motor chamber 40 s because the refrigerant in the compression chamber 18 is introduced via the back pressure introduction passage 37. As the pressure in the back pressure chamber 36 increases, the movable scroll 17 is urged toward the fixed scroll 16 so that the distal end surface of the movable spiral wall 17b is pressed against the fixed substrate 16a. Therefore, a refrigerant that is a fluid for urging the movable scroll 17 toward the fixed scroll 16 is introduced into the back pressure chamber 36.

  The rotary shaft 12 is formed with an in-shaft passage 12h that allows the back pressure chamber 36 and the rolling bearing 40d to communicate with each other. One end of the in-shaft passage 12h is open to the end surface 12a of the rotating shaft 12. The other end of the in-shaft passage 12h opens to a portion of the outer peripheral surface of the rotating shaft 12 supported by the rolling bearing 40d. The in-shaft passage 12h communicates the back pressure chamber 36 and the motor chamber 40s.

  A seal member 38 is housed in the seal member housing recess 26. The seal member 38 is provided between the outer peripheral surface of the rotating shaft 12 and the inner peripheral surface of the seal member housing recess 26. The seal member 38 seals between the outer peripheral surface of the rotating shaft 12 and the inner peripheral surface of the seal member housing recess 26. Therefore, the seal member 38 suppresses the flow of the refrigerant between the back pressure chamber 36 and the motor chamber 40s via the seal member housing recess 26 and the insertion hole 27.

  A thin plate-like elastic body 50 is provided between the end surface 17 e of the movable substrate 17 a and the end surface 20 a of the second housing component 20. Therefore, the elastic body 50 is disposed so as to be interposed between the movable side substrate 17 a and the second housing component 20. The elastic body 50 is disposed on the side opposite to the fixed scroll 16 with respect to the movable scroll 17 in the housing 11. The elastic body 50 is made of an elastically deformable material (for example, metal).

  As shown in FIG. 3, the elastic body 50 includes a thin plate-like spring portion 51 that is a disc shape, and an annular flange portion 52 that protrudes in the thickness direction of the spring portion 51. The collar portion 52 protrudes in a direction intersecting the spring portion 51. A circular through hole 51 a is formed at the center of the spring portion 51. A plurality of circular pin insertion holes 51b are formed around the through hole 51a in the spring portion 51. Each pin 33 is inserted into each pin insertion hole 51b. The flange portion 52 is located at the outermost peripheral edge 51 e of the spring portion 51. The flange portion 52 protrudes from the outermost peripheral edge 51 e of the spring portion 51 in a direction orthogonal to the spring portion 51. The elastic body 50 is a molded part by press working, and the flange portion 52 is formed by drawing the entire disc and bending the outer peripheral portion of the disc.

  As shown in FIG. 2, the hole diameter of the through hole 51 a is larger than the outer diameter of the boss portion 17 c of the movable scroll 17. In addition, the hole diameter of the through hole 51 a is the same as the hole diameter of the large-diameter recess 24. The elastic body 50 is disposed between the end surface 17 e of the movable side substrate 17 a and the end surface 20 a of the second housing component 20 so that the axis of the through hole 51 a coincides with the axis of the large-diameter recess 24. The inner peripheral edge of the through hole 51 a overlaps the inner peripheral surface of the large-diameter recess 24 in the axial direction of the rotary shaft 12. The spring portion 51 overlaps with the escape recess 20 h in the axial direction of the rotary shaft 12. When viewed from the axial direction of the rotary shaft 12, the outermost peripheral edge 51e of the spring portion 51 is located on the radially outer side of the rotary shaft 12 with respect to the inner peripheral surface of the escape recess 20h.

  An annular mounting groove 20g is formed on the outer peripheral portion of the bottom surface of the escape recess 20h. An O-ring 20s is mounted in the mounting groove 20g. The O-ring 20s is in close contact with the end surface of the spring portion 51 of the elastic body 50 on the second housing component 20 side. The O-ring 20 s seals between the spring portion 51 of the elastic body 50 and the end surface 20 a of the second housing component 20. Therefore, the O-ring 20 s suppresses the flow of the refrigerant between the back pressure chamber 36 and the introduction chamber 34 via the space between the spring portion 51 of the elastic body 50 and the end surface 20 a of the second housing component 20.

  As shown in FIG. 4, the tip of the convex portion 17 f of the movable scroll 17 is in pressure contact with the spring portion 51 of the elastic body 50. The spring portion 51 is pressed by the movable scroll 17 and elastically deformed in the thickness direction when the tip of the convex portion 17f of the movable scroll 17 is pressed. Only the convex portion 17 f of the movable scroll 17 is pressed against the end surface of the spring portion 51 on the movable scroll 17 side. The flange portion 52 protrudes from the outer peripheral side to the fixed scroll 16 side with respect to the portion where the convex portion 17f of the spring portion 51 is pressed. The flange 52 is located between the outer peripheral surface 17g of the movable substrate 17a and the inner peripheral surface 15g of the first housing component 15. Therefore, the outermost peripheral edge 51e and the flange 52 of the spring portion 51 are located between the outer peripheral surface 17g of the movable side substrate 17a and the inner peripheral surface 15g of the first housing component 15 when viewed from the axial direction of the rotating shaft 12. positioned. The outermost peripheral edge 51 e and the flange part 52 of the spring part 51 are separated from the inner peripheral surface 15 g of the first housing component 15. Only the flange 52 exists between the outer peripheral surface 17g of the movable substrate 17a and the inner peripheral surface 15g of the first housing component 15.

  The movable scroll 17 revolves with respect to the fixed scroll 16 while maintaining the state where the tip of the convex portion 17 f of the movable scroll 17 is in pressure contact with the spring portion 51 of the elastic body 50. The refrigerant flows between the convex portion 17f of the movable scroll 17 and the spring portion 51 of the elastic body 50 by the pressure contact between the tip of the convex portion 17f of the movable scroll 17 and the spring portion 51 of the elastic body 50. Is suppressed.

  The elastic body 50 is elastically deformed so as to swell toward the opposite side to the movable side substrate 17a when the convex portion 17f is pressed against the spring portion 51. The escape recess 20 h and the O-ring 20 s allow elastic deformation of the elastic body 50. The movable scroll 17 is urged toward the fixed scroll 16 by the return force that the elastic body 50 tries to return to the original shape acting on the movable scroll 17. Therefore, the elastic body 50 biases the movable scroll 17 toward the fixed scroll 16.

Next, the operation of this embodiment will be described.
The refrigerant in the compression chamber 18 is introduced into the back pressure chamber 36 through the back pressure introduction passage 37, and the movable scroll 17 is attached to the fixed scroll 16 by the pressure (back pressure) of the refrigerant introduced into the back pressure chamber 36. Be forced. As a result, the distal end surface of the movable spiral wall 17b is in pressure contact with the fixed substrate 16a, and the distal end surface of the fixed spiral wall 16b is in pressure contact with the movable substrate 17a, so that the compression chamber 18 is sealed.

  Further, since the elastic body 50 has an annular flange portion 52 that protrudes in a direction perpendicular to the spring portion 51 from the outer peripheral side with respect to the portion where the convex portion 17f of the spring portion 51 is pressed, the elastic body 50 is elastic. The rigidity of the outer periphery of the body 50 is increased. Therefore, when the elastic body 50 is elastically deformed so as to swell toward the opposite side of the movable side substrate 17a by the convex portion 17f being pressed against the spring portion 51, the elastic body 50 is returned to the original shape. A force acts on the movable scroll 17. As a result, the movable scroll 17 is biased toward the fixed scroll 16. Therefore, for example, even when the back pressure of the back pressure chamber 36 is not sufficient, such as when the scroll compressor 10 is started, the movable scroll 17 is urged by the fixed scroll 16. Sealing is improved.

In the above embodiment, the following effects can be obtained.
(1) The elastic body 50 includes a thin plate-like spring portion 51 that is pressed by the movable scroll 17 and elastically deforms in the thickness direction, and an annular flange portion 52 that protrudes in the thickness direction of the spring portion 51. . The outer peripheral surface 17g of the movable side substrate 17a and the inner peripheral surface 15g of the first housing component 15 are opposed to each other in the radial direction, and the outermost peripheral edge 51e and the flange portion 52 of the spring portion 51 are from the axial direction of the rotary shaft 12. As seen, it is located between the outer peripheral surface 17 g of the movable substrate 17 a and the inner peripheral surface 15 g of the first housing component 15. According to this, since the elastic body 50 has the flange part 52, the rigidity of the outer peripheral part of the elastic body 50 increases. Therefore, when the elastic body 50 is elastically deformed so as to swell toward the opposite side of the movable side substrate 17a by the convex portion 17f being pressed against the spring portion 51, the elastic body 50 is returned to the original shape. A force acts on the movable scroll 17. Therefore, as in the prior art, it is necessary to sandwich the outer peripheral portion of the elastic body 50 using the outer peripheral wall of the fixed scroll 16 in order to apply the return force that the elastic body 50 tries to return to the original shape to the movable scroll 17. Absent. As a result, a space for disposing the outer peripheral wall of the fixed scroll 16 on the outer side in the radial direction of the rotary shaft 12 from the outer peripheral surface 17g of the movable side substrate 17a is not necessary. Therefore, in the scroll compressor 10, the diameter of the rotary shaft 12 is eliminated. The enlargement in the direction can be suppressed.

  (2) The flange portion 52 protrudes from the spring portion 51 toward the fixed scroll 16 and is located between the outer peripheral surface 17g of the movable side substrate 17a and the inner peripheral surface 15g of the first housing component 15. According to this, since the collar part 52 can be located in the existing space which exists between the outer peripheral surface 17g of the movable side board | substrate 17a, and the internal peripheral surface 15g of the 1st housing structure 15, There is no need to provide a separate space for arrangement, and the configuration of the scroll compressor 10 can be simplified.

  (3) The flange portion 52 is located at the outermost peripheral edge 51 e of the spring portion 51. According to this, compared with the case where the collar portion 52 is located on the inner side of the outermost peripheral edge 51e of the spring portion 51, the portion of the spring portion 51 where the convex portion 17f is press-contacted is arranged. It can be located radially outward. That is, since the position of the convex portion 17f can be set on the radially outer side of the rotary shaft 12, the size of the movable scroll 17 in the radial direction of the rotary shaft 12 can be increased, and the volume of the compression chamber 18 can be increased. can do.

  (4) In the housing 11, the space for disposing the outer peripheral wall of the fixed scroll 16 is not required on the outer side in the radial direction of the rotary shaft 12 than the outer peripheral surface 17 g of the movable side substrate 17 a. The physique in the radial direction of the shaft 12 can be increased. Accordingly, since it is not necessary to increase the height of the movable spiral wall 17b in order to increase the volume of the compression chamber 18, the height of the movable spiral wall 17b can be suppressed, and the rotation in the scroll compressor 10 can be suppressed. The physique in the axial direction of the shaft 12 can be reduced in size.

In addition, you may change the said embodiment as follows.
As shown in FIG. 5, the flange portion 52 may protrude from the spring portion 51 to the side opposite to the fixed scroll 16. An annular housing groove 20k in which the flange portion 52 is housed is formed on the end surface 20a of the second housing structure 20. Even in this case, the outer peripheral surface 17g of the movable substrate 17a and the inner peripheral surface 15g of the first housing component 15 are opposed to each other in the radial direction, and the outermost peripheral edge 51e and the flange portion 52 of the spring portion 51 are When viewed from the axial direction of the rotating shaft 12, the movable substrate 17 a is located between the outer peripheral surface 17 g and the inner peripheral surface 15 g of the first housing component 15.

In embodiment, the collar part 52 may be located inside the outermost periphery 51e of the spring part 51, for example.
In embodiment, the collar part 52 may protrude in the direction which crosses with respect to the spring part 51 from the outermost periphery 51e of the spring part 51. As shown in FIG. In short, the flange portion 52 only has to protrude in a direction intersecting the spring portion 51 from the spring portion 51.

  In the embodiment, the flange portion 52 may be bent so as to protrude from the spring portion 51 in a direction intersecting the spring portion 51, and the distal end of the flange portion 52 may face the direction along the spring portion 51. .

  In the embodiment, the flange portion 52 may be a separate body from the spring portion 51. That is, the elastic body 50 may be configured by attaching the flange portion 52 to the spring portion 51.

  In the embodiment, the partition wall that partitions the back pressure chamber 36 in cooperation with the movable side substrate 17 a may not be a part of the housing 11 but may be a member accommodated in the housing 11.

In the embodiment, the scroll compressor 10 may be of a type driven by a vehicle engine.
(Circle) in embodiment, the scroll compressor 10 may not be used for a vehicle air conditioner, and may be used for another air conditioner.

  DESCRIPTION OF SYMBOLS 10 ... Scroll type compressor, 11 ... Housing, 12 ... Rotating shaft, 15g ... Inner peripheral surface, 16 ... Fixed scroll, 16a ... Fixed side board | substrate, 16b ... Fixed side spiral wall, 17 ... Movable scroll, 17a ... Movable side board | substrate , 17b ... movable side spiral wall, 17g ... outer peripheral surface, 18 ... compression chamber, 20 ... second housing component functioning as a partition wall, 36 ... back pressure chamber, 50 ... elastic body, 51 ... spring part, 51e ... Outer peripheral edge, 52.

Claims (3)

A tubular housing;
A rotating shaft rotatably supported with respect to the housing;
A fixed scroll having a fixed side substrate and a fixed side spiral wall erected from the fixed side substrate and fixed to the housing;
A movable side substrate facing the fixed side substrate, and a movable scroll having a movable side spiral wall standing from the movable side substrate toward the fixed side substrate and meshing with the fixed side spiral wall;
A compression chamber defined by the fixed-side substrate and the fixed-side spiral wall and the movable-side substrate and the movable-side spiral wall;
A back pressure chamber formed in the housing and into which a fluid for urging the movable scroll toward the fixed scroll is introduced;
A partition wall that partitions the back pressure chamber in cooperation with the movable substrate;
An elastic body arranged to be interposed between the movable side substrate and the partition wall and urging the movable scroll toward the fixed scroll,
The elastic body includes a thin plate-like spring portion that is pressed by the movable scroll and elastically deforms in the thickness direction, and an annular flange portion that protrudes in the thickness direction of the spring portion,
While the outer peripheral surface of the movable side substrate and the inner peripheral surface of the housing face each other in the radial direction,
The outermost peripheral edge of the spring part and the flange part are located between the outer peripheral surface of the movable-side substrate and the inner peripheral surface of the housing as seen from the axial direction of the rotating shaft. Scroll type compressor.   2. The scroll according to claim 1, wherein the flange portion protrudes from the spring portion toward the fixed scroll and is positioned between an outer peripheral surface of the movable-side substrate and an inner peripheral surface of the housing. Mold compressor.   3. The scroll compressor according to claim 1, wherein the flange portion is located at an outermost peripheral edge of the spring portion. 4.