JP6906932B2 - Scroll compressor - Google Patents

Description

The present invention relates to a scroll compressor.

The scroll compressor has a compressor body that includes a fixed scroll and a swivel scroll.
The compressor body includes a compression chamber formed by engaging a swivel scroll with a fixed scroll. The scroll compressor compresses the fluid in the compression chamber by driving the swivel scroll to revolve and swivel with respect to the fixed scroll.
Such a scroll compressor has a ring-shaped thrust plate as a member for suppressing seizure caused by sliding of the swivel scroll (see, for example, Patent Document 1).

In Patent Document 1, the position of the thrust plate is regulated by providing the swivel scroll with a ring-shaped recess for accommodating a part of the thrust plate and sandwiching the thrust plate between the swivel scroll and the front housing (frame). The configuration is disclosed.

Japanese Unexamined Patent Publication No. 2012-225257

As described above, in Patent Document 1, the thrust plate is sandwiched between the swivel scroll that revolves and swivels with respect to the fixed scroll and the front housing. For this reason, when the centrifugal force increases due to the rotation of the swivel scroll and the thrust load increases, the position of the thrust plate shifts from the recess and the thrust plate and the front housing interfere with each other, so that the thrust plate and peripheral parts (thrust plate) There was a possibility that the parts placed around the) would be damaged.

Therefore, an object of the present invention is to provide a scroll compressor capable of suppressing damage to the thrust plate and peripheral parts.

In order to solve the above problems, the scroll compressor according to the first aspect of the present invention is provided in a housing having a cylindrical rear housing and a front housing including a plate arrangement surface, and the rear housing. By engaging the fixed scroll fixed to the housing and the fixed scroll provided in the rear housing and engaging with the fixed scroll, a compression chamber is partitioned between the fixed scroll and the fixed scroll is revolved and swiveled around the fixed scroll. A ring-shaped thrust plate arranged between the swivel scroll and the end plate of the swivel scroll, which is arranged on the side opposite to the side where the fixed scroll is provided, and the plate arrangement surface of the front housing. The front housing includes a plurality of bolts that are fastened to a plate arrangement portion that partitions the plate arrangement surface and regulate the position of the thrust plate with respect to the plate arrangement surface, and the plurality of bolts. Each includes a head and a shaft portion to which one end is connected to the head, and at least a part of the head is arranged so as to project from the plate arrangement surface, and the thrust plate is the head. Has a plurality of through holes through which the scroll can pass.

In this way, among the front housings that do not rotate, by having a plurality of bolts that are fastened to the plate arrangement portion that partitions the plate arrangement surface and regulate the position of the thrust plate with respect to the plate arrangement surface, the rotation of the swivel scroll As a result, even when the centrifugal force increases and the thrust load increases, it is possible to suppress the displacement of the thrust plate.
As a result, interference between the thrust plate and the front housing is suppressed, so that damage to the thrust plate and peripheral parts (parts arranged around the thrust plate) can be suppressed.
Further, the thrust plate can be arranged on the plate arrangement surface in a state where the plurality of bolts are fastened to the plate arrangement portion without removing the plurality of bolts fastened to the plate arrangement portion from the plate arrangement portion. As a result, the position regulation of the thrust plate can be enhanced by fitting the head of the bolt and the through hole of the thrust plate.
In addition, by configuring the thrust plate not to be directly fastened with bolts, it is possible to fasten bolts.
Since the occurrence of distortion and deformation of the thrust plate due to it is suppressed, the reliability of the scroll compressor
The sex can be improved.

Further, in the scroll compressor according to the second aspect of the present invention, in the first aspect, the front housing is provided in the circumferential direction of the outer peripheral portion of the plate arrangement portion, and corresponds to the plate arrangement surface. A plurality of second notches formed by notching the plate arrangement portion are included, and the thrust plate is provided in the circumferential direction of the outer peripheral portion of the thrust plate, and the plurality of thrust plates are provided in a bent state. Each may have a claw portion arranged in the second notch portion.

In this way, by having the claws arranged in the plurality of second notches in a bent state, the position of the thrust plate is regulated by using both the claws and the heads of the bolts. Therefore, even if the thrust load increases, the displacement of the thrust plate can be further suppressed.
Further, since the position of the thrust plate can be regulated by using both the members of the claw portion and the head of the bolt, one of the claw portion and the head of the bolt can be worn out and the thrust plate can be regulated. Even if the function of the position regulation of the above is lost, the position regulation of the thrust plate can be performed by using the other. As a result, the reliability of the scroll compressor can be improved.

Further, in the scroll compressor according to the third aspect of the present invention, in the second aspect, the first clearance formed between the head of the bolt and the through hole of the thrust plate is the thrust. It may be smaller than the second clearance formed between the bent position of the plate and the second notch.

In this way, by making the first clearance smaller than the second clearance, when the thrust plate is displaced, the thrust plate of the portion that divides the through hole and the bolt come into contact with each other, so that a plurality of claws are formed. It is possible to suppress collision with the corner of the second notch.
This makes it possible to suppress damage to the claw portion due to the claw portion colliding with the corner of the second notch portion.

In order to solve the above problems, the scroll compressor according to the fourth aspect of the present invention is provided in a housing having a cylindrical rear housing and a front housing including a plate arrangement surface, and the rear housing. By engaging the fixed scroll fixed to the housing and the fixed scroll provided in the rear housing, a compression chamber is partitioned between the fixed scroll and the fixed scroll is revolved and swiveled around the fixed scroll. A ring-shaped thrust plate arranged between the swivel scroll and the end plate of the swivel scroll, which is arranged on the side opposite to the side where the fixed scroll is provided, and the plate arrangement surface of the front housing. And the front housing, the front housing includes a plurality of bolts that are fastened to a plate arrangement portion that partitions the plate arrangement surface and regulate the position of the thrust plate with respect to the plate arrangement surface. The thrust plate includes a plurality of second notches provided in the circumferential direction of the outer peripheral portion of the plate arrangement portion and formed by notching the plate arrangement portion corresponding to the plate arrangement surface. Has claws provided in the circumferential direction of the outer peripheral portion of the thrust plate and arranged in the plurality of second notches in a bent state, and the head of the bolt and the thrust plate. The first clearance formed between the through hole and the second clearance is smaller than the second clearance formed between the bent position of the thrust plate and the second notch.

In this way, among the front housings that do not rotate, the swivel scroll can be swiveled by having a plurality of bolts that are fastened to the plate arrangement portion that partitions the plate arrangement surface and regulate the position of the thrust plate with respect to the plate arrangement surface. As a result, even when the centrifugal force increases and the thrust load increases, it is possible to suppress the displacement of the thrust plate.
As a result, interference between the thrust plate and the front housing is suppressed, so that damage to the thrust plate and peripheral parts (parts arranged around the thrust plate) can be suppressed.
Further, by having the claws arranged in the plurality of second notches in a bent state, the position of the thrust plate can be regulated by using both the claws and the heads of the bolts. Since it is possible, the displacement of the thrust plate can be further suppressed even when the thrust load increases.
Further, since the position of the thrust plate can be regulated by using both the members of the claw portion and the head of the bolt, one of the claw portion and the head of the bolt can be worn out and the thrust plate can be regulated. Even if the function of the position regulation of the above is lost, the position regulation of the thrust plate can be performed by using the other. As a result, the reliability of the scroll compressor can be improved.
Further, by making the first clearance smaller than the second clearance, when the thrust plate is displaced, the thrust plate of the portion that divides the through hole and the bolt come into contact with each other, so that the plurality of claws are seconded. It is possible to prevent the vehicle from colliding with the corner of the notch.
This makes it possible to suppress damage to the claw portion due to the claw portion colliding with the corner of the second notch portion.

Further, in the scroll compressor according to the fifth aspect of the present invention, in the second to fourth aspects, a plurality of the claws are provided on the thrust plate in the radial direction of the thrust plate. It may be provided at a position different from the position where the through hole is formed.

By providing the plurality of claws at such positions, it is possible to prevent the strength of the plurality of claws from decreasing.

Further, in the scroll compressor according to the sixth aspect of the present invention, in the second to fifth aspects, the plurality of the claws are outside the positions where the plurality of through holes provided in the thrust plate are formed. May be placed in.

The plurality of claws are formed by bending a thrust plate, which is a thin plate. Therefore, the claw portion may be damaged when it receives a large thrust load.
Therefore, by providing a plurality of claws outside the formation positions (in other words, bolt positions) of the plurality of through holes provided in the thrust plate, even when a large thrust load is applied to the thrust plate, a plurality of claws are provided. By contacting the thrust plate with a plurality of bolts arranged inside the claw portion of the thrust plate, it is possible to reduce the thrust load on the outer peripheral portion of the thrust plate. As a result, the plurality of claws are not subjected to a large thrust load. Therefore, the displacement of the thrust plate can be further suppressed while suppressing the damage of the plurality of claws.

Further, in the scroll compressor according to the seventh aspect of the present invention, in the first to sixth aspects, the heads of the plurality of bolts are arranged outside the swivel scroll, and the end plate is provided. A first notch portion capable of accommodating the head when the swivel scroll revolves around the outer peripheral portion of the head may be provided.

By providing the first notch portion having such a configuration on the outer peripheral portion of the end plate, it is possible to prevent the outer peripheral portion of the swivel scroll from coming into contact with the head of the bolt when the swivel scroll revolves. can.

Further, in the scroll compressor according to the eighth aspect of the present invention, in the first to seventh aspects, the material of the plurality of bolts may be a material harder than the material of the swivel scroll.

In this way, by using a material harder than the material of the swivel scroll as the material of the plurality of bolts, even if the outer peripheral portion of the swivel scroll and the head of the bolt come into contact with each other when the swivel scroll revolves around the bolt. It is possible to prevent damage to the head of the scroll. As a result, even when the thrust load increases, the displacement of the thrust plate can be suppressed by the plurality of bolts.

Further, in the scroll compressor according to the ninth aspect of the present invention, in the first to eighth aspects, the rear housing includes a suction port for sucking a fluid into the rear housing, and the plurality of suction ports are included. The bolt may be provided at a position separated from the suction port in the circumferential direction of the plate arrangement portion.

In this way, by providing a plurality of bolts at positions separated from the suction port for sucking the fluid in the circumferential direction of the plate arrangement portion, the fluid is less likely to collide with the head of the bolt. As a result, it is possible to suppress the occurrence of turbulence in the air flow of the fluid in the housing.

Further, in the scroll compressor according to the tenth aspect of the present invention, in the first to ninth aspects, the plate arrangement portion of the front housing is provided with a bolt hole to which the plurality of bolts are fastened. The plurality of bolts are provided at the other end of the shaft portion of the plurality of bolts, have an outer diameter smaller than the outer diameter of the shaft portion, and have a protruding portion protruding in the extending direction of the shaft portion. It may be included.

In this way, by having a protruding portion having an outer diameter smaller than the outer diameter of the shaft portion and projecting in the extending direction of the shaft portion at the other end of the shaft portion of the plurality of bolts, the bolt can be inserted into the bolt hole. By inserting the protruding portion into the bolt hole at the time of fastening, the bolt can be made self-supporting with respect to the bolt hole. This makes it possible to easily fasten bolts to a plurality of bolt holes.

Further, the scroll compressor according to the eleventh aspect of the present invention is provided between the swivel scroll and the thrust plate in the first to tenth aspects, and suppresses the rotation of the swivel scroll. The thrust plate includes a plurality of insertion notches into which the engagement protrusions are inserted, and the plurality of through holes are the plurality of insertions. It may be provided at a position away from the notch.

By providing a plurality of through holes at positions separated from the plurality of insertion notches in this way, the strength of the portion of the thrust plate that partitions the through holes and the portion that partitions the insertion notches is increased. The decrease can be suppressed.

According to the present invention, damage to the thrust plate and peripheral parts (parts arranged around the thrust plate) can be suppressed.

It is sectional drawing which shows typically the schematic structure of the main part of the scroll compressor which concerns on 1st Embodiment of this invention. It is a schematic diagram for demonstrating the positional relationship between the suction port which constitutes a housing, and a plurality of bolts. It is a cross-sectional view of a C ₁ -C ₂ along the line of the scroll compressor shown in FIG. It is a top view which shows typically the rotation suppression member shown in FIG. It is sectional drawing for demonstrating the deformation example of a bolt fastened to a plate arrangement part. It is sectional drawing which shows typically the schematic structure of the main part of the scroll compressor which concerns on the modification of 1st Embodiment. It is a figure which shows typically the schematic structure of the main part of the scroll compressor which concerns on 2nd Embodiment of this invention. It is a cross-sectional view of D ₁ -D ₂ along the line of the scroll compressor shown in FIG.

Hereinafter, embodiments to which the present invention has been applied will be described in detail with reference to the drawings.

(First Embodiment)
The scroll compressor 10 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. _{Note that O 1} shown in FIG. 1 indicates an axis of the drive shaft 14 (hereinafter, referred to as “axis O ₁ ”). FIG. 2 is a view of the plate arrangement portion 42, the thrust plate 27, the bolt 12, and the rear housing 32 shown in FIG. 1 as viewed from A. In FIG. 2, for convenience of explanation, the rear housing 32 is shown in cross section. E shown in FIG. 2 indicates the circumferential direction of the plate arrangement portion 42 (hereinafter, referred to as “circumferential direction E”).
In FIGS. 2 and 3, the same components as those of the structure shown in FIG. 1 are designated by the same reference numerals. Further, in FIG. 3, for convenience of explanation, an end plate 51A (see FIG. 1), which is not shown in FIG. 2, is shown.

The scroll compressor 10 includes a housing 11, a plurality of bolts 12, a main bearing 13, a drive shaft 14, a sub bearing 15, a lip seal 17, a drive shaft 14, a sub bearing 15, and a lip seal 17. It has a driven crank mechanism 19, a compressor main body 21, a rotation suppressing member 23, and a thrust plate 27.

The housing 11 has a closed structure, and has a rear housing 32 and a front housing 34.
The rear housing 32 is a cylindrical cup-shaped member. The rear housing 32 has an open end on one side. The rear housing 32 has a suction port 35 for introducing a fluid into the housing 11 from the outside of the housing 11.

The front housing 34 is provided on the open end side of the rear housing 32 so as to close the open end of the rear housing 32. The front housing 34 has a first housing portion 36 and a second housing portion 37.

The first housing portion 36 is fitted to the rear housing 32 on the open end side of the rear housing 32 via a sealing member (for example, an O-ring or the like).
The first housing portion 36 has a main bearing accommodating portion 41 and a plate arranging portion 42. The main bearing accommodating portion 41 has a space inside which the main bearing 13 can be accommodated.

Plate arranging unit 42, in the axial O _1, it is arranged between the main bearing receiving portion 41 and the orbiting scroll 51. The plate arranging portion 42 projects in the direction toward the swivel scroll 51 from the main bearing accommodating portion 41 located outside the main bearing 13. The shape of the plate arrangement portion 42 is a ring shape.
The plate arrangement portion 42 has a plate arrangement surface 42a which is a plane facing the swivel scroll 51. The plate arrangement surface 42a is a ring-shaped flat surface. A thrust plate 27 is arranged on the plate arrangement surface 42a.

The plate arranging portion 42 has a plurality of bolt holes 42A (in the case of FIG. 2, two as an example) and a notch groove 42B. Bolts 12 are fastened to the plurality of bolt holes 42A, respectively. It is preferable that the plurality of bolt holes 42A are provided at positions separated from the suction port 35 in the circumferential direction E of the plate arrangement portion 42, for example.

By providing the plurality of bolt holes 42A at positions separated from the suction port 35 in the circumferential direction E of the plate arrangement portion 42, the plurality of bolts 12 are separated from the suction port 35 in the circumferential direction E of the plate arrangement portion 42. It is possible to place it in the desired position.
As a result, it is possible to prevent the fluid immediately after being sucked from the suction port 35 from colliding with the head portion 12A of the bolt 12, and thus it is possible to suppress the occurrence of turbulence in the airflow formed in the housing 11. can.

Further, as shown in FIG. 2, if the plate arranging unit 42 has two bolt holes 42A, two bolt holes 42A is across the axis O _1, may be opposed. By providing the two bolt holes 42A at such positions, the position of the thrust plate 27 with respect to the plate arrangement 42 can be firmly regulated by using the two bolts 12.
In FIG. 2, the case where two bolt holes 42A are provided has been described as an example, but the number of bolt holes 42A may be a plurality and is not limited to two.

The notch groove 42B is formed by notching a part of the inner peripheral portion of the plate arrangement surface 42a. A plurality of notch grooves 42B (two as an example in the case of FIG. 2) are arranged in the circumferential direction of the plate arrangement portion 42. As shown in FIG. 2, the case of providing the two notched groove 42B, it may be arranged opposite each other across the axis O _1.

The plurality of bolts 12 have a head portion 12A and a shaft portion 12B having one end connected to the head portion 12A. The plurality of bolts 12 are provided in the plate arrangement portion 42. The bolts 12 are fastened to the two bolt holes 42A in a state where the lower surface 12Aa of the head portion 12A is in contact with the plate arranging surface 42a. As a result, the entire head 12A protrudes from the plate arrangement surface 42a. The plurality of bolts 12 are arranged in the circumferential direction of the outer peripheral portion of the thrust plate 27.

The head portion 12A of the bolt 12 is arranged in the through hole 64 of the thrust plate 27, which will be described later, so that when the thrust plate 27 is displaced, the thrust plate 27 that partitions the through hole 64 is brought into contact with the head 12A. , The displacement of the thrust plate 27 is suppressed.

The plurality of bolts 12 may be provided, for example, at positions separated from the suction port 35 in the circumferential direction of the plate arrangement portion 42.
In this way, by providing the plurality of bolts 12 at positions separated from the suction port 35 for sucking the fluid in the circumferential direction of the plate arrangement portion 42, the fluid is less likely to collide with the head portion 12A of the bolt 12. As a result, it is possible to suppress the occurrence of turbulence in the air flow of the fluid in the housing 11.

The second housing portion 37 is integrally formed with the first housing portion 36 so that the first housing portion 36 is arranged between the second housing portion 37 and the swivel scroll 51.
The second housing portion 37 is a cylindrical member extending in the axial O ₁ direction, and both ends are open ends. The outer diameter and inner diameter of the second housing portion 37 are configured to be smaller than the outer diameter and inner diameter of the main bearing accommodating portion 41.

The main bearing 13 has an outer ring 13A, an inner ring 13B, and a plurality of rolling elements 13C. The outer ring 13A is fixed to the main bearing accommodating portion 41. The inner ring 13B is fixed to the outer peripheral portion of the base end portion 14A of the drive shaft 14. The plurality of rolling elements 13C are arranged between the outer ring 13A and the inner ring 13B.

Drive shaft 14 extends in the axial _{O 1} direction and has a proximal portion 14A, and a tip portion 14B, the crank pin 14C, a.
The drive shaft 14 penetrates the second housing portion 37 from the inside of the housing 11. A part of the tip portion 14B of the drive shaft 14 is housed in the second housing portion 37 with a gap in which the sub bearing 15 can be arranged is interposed between the tip portion 14B and the second housing portion 37.
The remaining portion of the tip portion 14B of the drive shaft 14 (the portion located on the tip side of the tip portion 14B) protrudes to the outside of the second housing portion 37.

The base end portion 14A has a larger diameter than the tip end portion 14B. The crank pin 14C is provided at the base end portion 14A located on the side opposite to the side where the tip end portion 14B is arranged. Crank pin 14C is arranged in a predetermined dimension eccentric position with respect to the axis O _1.

The sub-bearing 15 is provided between the second housing portion 37 and a part of the tip portion 14B of the drive shaft 14. The sub-bearing 15 has an outer ring 15A, an inner ring 15B, and a plurality of rolling elements 15C. The outer ring 15A is fixed to the inside of the second housing portion 37.
The inner ring 15B is fixed to a part of the outer peripheral portion of the tip portion 14B of the drive shaft 14. The plurality of rolling elements 15C are arranged between the outer ring 15A and the inner ring 15B.
As a result, the sub-bearing 15 rotatably supports the drive shaft 14 together with the main bearing 13.

The lip seal 17 is provided on the inner wall of the second housing portion 37 located closer to the base end portion 14A of the drive shaft 14 than the sub bearing 15. The lip seal 17 is in contact with the outer peripheral surface of the drive shaft 14. The lip seal 17 is a sealing member for maintaining airtightness inside the housing 11 (to prevent air from entering outside the housing 11).

The driven crank mechanism 19 has a drive bush 46 and a swivel bearing 47. The drive bush 46 accommodates the crank pin 14C and is fixed to the outside of the crank pin 14C. The swivel bearing 47 is provided on the outside of the drive bush 46.

The compressor main body 21 is housed in the housing 11 and has a fixed scroll 49 and a swivel scroll 51.
The fixed scroll 49 has an end plate 49A and a wrap portion 49B. End plate 49A is perpendicular to the axis _{O 1.} End plate 49A is in the axial O ₁ direction via the orbiting scroll 51 are opposed and the front housing 34. End plate 49A, along orthogonal to the axis _{O 1,} having a surface 49Aa facing the orbiting scroll 51. The end plate 49A of the fixed scroll 49 is fixed to the rear housing 32 by bolts or the like.

The wrap portion 49B has a spiral shape and is provided on one surface 49Aa of the end plate 49A. Wrap portion 49B is erected on the axis _{O 1} direction.

The swivel scroll 51 is arranged between the front housing 34 and the fixed scroll 49. The swivel scroll 51 has an end plate 51A, a wrap portion 51B, and a boss portion 51C.
End plate 51A is perpendicular to the axis _{O 1.} The end plate 51A has one surface 51Aa facing one surface 49Aa of the fixed scroll 49, another surface 51Ab, and a first notched portion 51Ac.
One surface 51Aa is in contact with the inner peripheral portion of the thrust plate 27, and is arranged inside the position where the heads 12A of the plurality of bolts 12 are provided.

Other surface 51Ab is arranged on the opposite side of the one surface 51Aa, are perpendicular to the axis _{O 1.} The other surface 51Ab faces the driven crank mechanism 19.
The first notch 51Ac is provided on the outer peripheral portion of the end plate 51A so that the head portion 12A of the bolt 12 can be accommodated when the swivel scroll 51 revolves.
By providing the first notch portion 51Ac having such a configuration on the outer peripheral portion of the end plate 51A, when the swivel scroll 51 revolves, the outer peripheral portion of the swivel scroll 51 and the head portion 12A of the bolt 12 are formed. Can be suppressed from contacting.

The wrap portion 51B has a spiral shape and is provided on one surface 51Aa of the end plate 51A. Wrap portion 51B is erected on the axis _{O 1} direction (the direction toward the end plate 49A). The lap portion 51B is meshed with the lap portion 49B. As a result, a compression chamber 21A for compressing the fluid is partitioned between the fixed scroll 49 and the swivel scroll 51.

The boss portion 51C is provided on the other surface 51Ab of the end plate 51A. The boss portion 51C protrudes from the other surface 51Ab of the end plate 51A in the direction toward the front housing 34. The boss portion 51C accommodates a part of the driven crank mechanism 19. The boss portion 51C is connected to the crank pin 14C via a driven crank mechanism 19.
As a result, the swivel scroll 51 is configured to be able to revolve and swivel with respect to the fixed scroll 49.

As the material of the plurality of bolts 12 described above, for example, a material harder than the material of the swivel scroll 51 may be used.
As described above, by using a material harder than the material of the swivel scroll 51 as the material of the plurality of bolts 12, when the swivel scroll 51 revolves, the outer peripheral portion of the swivel scroll 51 and the head portion 12A of the bolt 12 are formed. It is possible to prevent the head portion 12A of the bolt 12 from being damaged even when the bolts 12 come into contact with each other. As a result, even when the thrust load increases, it is possible to suppress the suppression of the displacement of the thrust plate 27 by the plurality of bolts 12.

Next, the rotation suppressing member 23 will be described with reference to FIGS. 1, 2, and 4. FIG. 4 shows a rotation suppressing member 23 viewed from the front housing 34 side in a plan view. Further, in FIG. 4, an omdam ring is illustrated as an example of the rotation suppressing member 23.

The rotation suppressing member 23 is provided between the plate arranging portion 42 and the swivel scroll 51. The rotation suppressing member 23 has a ring-shaped member 55, a first engaging protrusion 56, and a second engaging protrusion 57. The ring-shaped member 55 has a surface that comes into contact with the end plate 51A of the swivel scroll 51, and a surface 55a that is arranged on the side opposite to the surface. The surface 55a is a surface facing the front housing 34.

The first engaging protrusions 56 are provided on the surface 55a of the ring-shaped member 55 in the same number as the notch grooves 42B. The first engaging protrusion 56 projects in a direction orthogonal to the surface 55a of the ring-shaped member 55. The first engaging protrusion 56 is arranged at a position where it can be inserted into the notch groove 42B.

A plurality of second engaging protrusions 57 are provided on the surface 55a of the ring-shaped member 55 located on the opposite side of the surface 55a (in the case of FIG. 3, two as an example). The second engaging protrusion 57 projects from the surface 55a of the ring-shaped member 55 located on the opposite side of the surface 55a. The second engaging protrusion 57 has a wider shape than the ring-shaped member 55. The second engaging protrusion 57 is inserted into the groove formed in the end plate 51A.
The rotation suppressing member 23 having the above configuration suppresses the rotation of the swivel scroll 51.

In FIG. 4, as an example of the rotation suppressing member 23, an old dam ring has been described as an example, but for example, a pin / link type rotation suppressing member or another type of rotation suppressing member may be used.

Next, the thrust plate 27 will be described with reference to FIGS. 1 to 4.
The thrust plate 27 is a thin metal plate, and is provided between the plate arrangement portion 42 and the swivel scroll 51. The thrust plate 27 has a plate body 61, a plurality of insertion notches 62, and a plurality of through holes 64.

The plate body 61 is a ring-shaped plate material. The entire surface of the plate body 61 is in contact with the plate arrangement surface 42a, and the inner peripheral portion of the other surface is in contact with the end plate 51A of the swivel scroll 51. As a result, the outer peripheral portion of the plate body 61 is exposed from the end plate 51A.

A plurality of (two in the case of FIG. 2, as an example) insertion notches 62 are provided in the inner peripheral portion of the plate main body 61. The plurality of insertion notches 62 are provided so as to correspond to the formation positions of the notch grooves 42B.
A part of the first engaging protrusion 56 is inserted into the plurality of insertion notches 62. By inserting the first engaging protrusion 56 into the insertion notch 62 and the notch groove 42B, the positions of the plate arrangement portion 42, the thrust plate 27, and the rotation suppressing member 23 are restricted.

As shown in FIG. 2, when providing two insertion notch 62, two insertion notch 62 may be arranged so as to face each other across the axis O _1. The number of notches 62 for insertion may be a plurality, and is not limited to two.

The plurality of through holes 64 (two as an example in the case of FIG. 2) are circular holes formed by penetrating the outer peripheral portion of the plate main body 61. The diameters of the plurality of through holes 64 are set to a size that allows the head portion 12A of the bolt 12 to pass through. _{A first clearance CL 1} is provided between the plurality of through holes 64 and the head portion 12A of the bolt 12. A plurality of through holes 64 through the first clearance CL _1, surrounds the head 12A of the bolt 12.

As described above, the thrust plate 27 is provided on the plate arrangement surface 42a of the plate arrangement portion 42 and includes a plurality of through holes 64 sized so that the head portion 12A of the bolt 12 protruding from the plate arrangement surface 42a can pass therethrough. As a result, the thrust plate 27 is attached to the plate arrangement surface 42a in a state where the plurality of bolts 12 are fastened to the plate arrangement portion 42 without removing the plurality of bolts 12 fastened to the plate arrangement portion 42 from the plate arrangement portion 42. It becomes possible to arrange.
As a result, the position regulation of the thrust plate 27 can be enhanced by fitting the head portion 12A of the bolt 12 and the through hole 64 of the thrust plate 27.
Further, by adopting a configuration in which the thrust plate 27 is not directly fastened with the bolt 12, the occurrence of distortion and deformation of the thrust plate 27 due to the bolt fastening is suppressed, so that the reliability of the scroll compressor 10 can be improved. can.

Further, the plurality of through holes 64 may be provided at positions separated from the plurality of insertion notches 62, for example.
By providing the plurality of through holes 64 at positions separated from the plurality of insertion notches 62 in this way, the portion of the thrust plate 27 that partitions the through holes 64 and the insertion notch 62 are partitioned. It is possible to suppress a decrease in the strength of the portion to be processed.

In the scroll compressor 10 having the above configuration, in a state where a plurality of bolts 12 are fastened to the bolt holes 42A of the plate arrangement portion 42, the swivel scroll 51 is separated from the thrust plate 27 to replace the thrust plate 27 ( Perform maintenance).

According to the scroll compressor 10 of the first embodiment, the position of the thrust plate 27 with respect to the plate arrangement 42 is determined by being fastened to the plate arrangement portion 42 that partitions the plate arrangement surface 42a in the front housing 34 that does not rotate. By having a plurality of regulating bolts 12, it is possible to suppress the displacement of the thrust plate 27 even when the centrifugal force increases due to the rotation of the swivel scroll 51 and the thrust load increases.
As a result, interference between the thrust plate 27 and the front housing 34 is suppressed, so that damage to the thrust plate 27 and peripheral parts (parts arranged around the thrust plate 27) can be suppressed.

Next, a modified example of the bolt fastened to the plate arranging portion 42 will be described with reference to FIG. In FIG. 5, the same components as those of the structure shown in FIG. 3 are designated by the same reference numerals.

The bolt 67 is configured in the same manner as the bolt 12 except that the protrusion 68 is further provided in the configuration of the bolt 12 shown in FIG. The plurality of bolts 67 are fastened to the bolt holes 42A. The protruding portion 68 is provided at the other end of the shaft portion 12B.
The protruding portion 68 projects in the extending direction of the shaft portion 12B. The outer diameter of the protruding portion 68 is configured to be smaller than the outer diameter of the shaft portion 12B.

As described above, the other end of the shaft portion 12B of the plurality of bolts 67 has a protruding portion 68 having an outer diameter smaller than the outer diameter of the shaft portion 12B and protruding in the extending direction of the shaft portion 12B. When the bolt 67 is fastened to the bolt hole 42A, the bolt 67 can be made independent with respect to the bolt hole 42A by inserting the protrusion 68 into the bolt hole 42A. Thereby, the bolt 67 can be easily fastened to the plurality of bolt holes 42A.

Next, with reference to FIG. 6, the scroll compressor 70 according to the modified example of the first embodiment will be described. In FIG. 6, only a part of the components of the scroll compressor 70 is shown. In FIG. 6, the same components as those of the structure shown in FIG. 3 are designated by the same reference numerals.

The scroll compressor 70 is configured in the same manner as the scroll compressor 10 except that it has a bolt hole 71 instead of the bolt hole 42A constituting the scroll compressor 10 of the first embodiment.

The bolt hole 71 has a head accommodating portion 71A and a shaft portion hole 71B. The head accommodating portion 71A is provided on the plate arranging surface 42a side of the plate arranging portion 42. The head accommodating portion 71A accommodates a part of the head 12A of the bolt 12. The shaft portion hole 71B is a hole into which the shaft portion 12B of the bolt 12 is screwed, and is formed integrally with the head accommodating portion 71A.

By providing the bolt hole 71 having such a configuration in the plate arranging portion 42 and fastening the bolt 12 to the bolt hole 71, it is possible to reduce the amount of protrusion of the head 12A protruding from the plate arranging surface 42a. Become.
Thus, the structure shown in FIG. 3 compared (entire head 12A from the plate placement surface 42a is a structure protruding) and, in the axial O ₁ direction shown in the width W (FIG. 1 of the first notch portions 51Ac Width) can be reduced.

(Second embodiment)
The scroll compressor 75 of the second embodiment will be described with reference to FIGS. 3, 7, and 8. In FIG. 7, only the main part of the scroll compressor 75 is schematically shown. Further, in FIG. 6, the same components as those of the structure shown in FIG. 2 are designated by the same reference numerals. Further, in FIG. 7, the same components as those of the structures shown in FIGS. 1 and 7 are designated by the same reference numerals.

The scroll compressor 75 of the second embodiment is provided with a plurality of second notch portions 76 in the plate arrangement portion 42 described in the first embodiment, and constitutes the scroll compressor 10 of the first embodiment. It is configured in the same manner as the scroll compressor 10 except that it has a thrust plate 78 instead of the thrust plate 27.

The plurality of second notch portions 76 are provided in the circumferential direction of the outer peripheral portion of the plate arrangement portion 42 for partitioning the plate arrangement surface 42a. The second cutout portion 76 has a surface 76a orthogonal to the plate arrangement surface 42a.
The second notch 76 can be arranged, for example, between the bolt 12 and the notch groove 42B.
By providing the second notch 76 at such a position, the second notch 76 can be arranged at a position where the insertion notch 62 and the through hole 64 are not provided.

The thrust plate 78 is configured in the same manner as the scroll compressor 10 described in the first embodiment, except that it has a plurality of claw portions 79.
The plurality of claw portions 79 are configured such that a portion protruding from the outer peripheral edge of the plate main body 61 is bent toward the second notched portion 76. The claw portion 79 is arranged in the plurality of second notch portions 76.

In this way, by having the claw portions 79 arranged in the plurality of second notch portions 76 in a bent state, both the claw portion 79 and the head portion 12A of the bolt 12 are used for thrusting. Since the position of the plate 78 can be regulated, the displacement of the thrust plate 78 can be further suppressed even when the thrust load increases.
Further, since the position of the thrust plate 78 can be regulated by using both the members of the claw portion 79 and the head portion 12A of the bolt 12, any one of the claw portion 79 and the head portion 12A of the bolt 12 can be regulated. Even if one loses the function of restricting the position of the thrust plate 78 due to wear or the like, the position of the thrust plate 78 can be regulated by using the other. Thereby, the reliability of the scroll compressor 75 can be improved.

Further, the plurality of claw portions 79 may be arranged outside the formation positions of the plurality of through holes 64 provided in the thrust plate 78, for example.
The plurality of claws 79 are formed by bending a thrust plate 78, which is a thin metal plate. Therefore, the claw portion 79 may be damaged when it receives a large thrust load.

Therefore, by providing a plurality of claw portions 79 outside the formation positions of the plurality of through holes 64 provided in the thrust plate 78 (in other words, the positions of the plurality of bolts 12), a large thrust load is applied to the thrust plate 78. Even when applied, the thrust plate 78 is brought into contact with the plurality of bolts 12 arranged inside the plurality of claw portions 79, so that the thrust load on the outer peripheral portion of the thrust plate 78 can be reduced. Therefore, the plurality of claw portions 79 are not subjected to a large thrust load.
As a result, the displacement of the thrust plate 78 can be further suppressed while suppressing the damage of the plurality of claw portions 79.

Further, the plurality of claw portions 79 may be provided at positions different from the formation positions of the plurality of through holes 64 provided in the thrust plate 78 in the radial direction of the thrust plate 78.
By providing the plurality of claw portions 79 at such positions, it is possible to suppress a decrease in the strength of the plurality of claw portions 79.

_{A second clearance CL 2} is formed between the surface 76a of the second notch 76 and the claw 79. The first clearance CL ₁ described above may be smaller than, for example, the second clearance CL _2.

By making the first clearance CL ₁ smaller than the second clearance CL _{2 in} this way, when the thrust plate 78 is displaced, the thrust plate 78 of the portion that partitions the through hole 64 and the bolt 12 come into contact with each other. As a result, it is possible to prevent the claw portion 79 from colliding with the angle 76A of the second notch portion 76.
As a result, damage to the claw portion 79 caused by the claw portion 79 colliding with the corner 76A of the second notch portion 76 can be suppressed.

According to the scroll compressor 75 of the second embodiment, in addition to the plurality of bolts 12 that regulate the position of the thrust plate 78 with respect to the plate arrangement 42, the scroll compressor 75 is arranged in the circumferential direction of the outer peripheral edge of the thrust plate 78. By having the plurality of claw portions 79, it is possible to suppress damage to the plurality of claw portions 79 and further suppress the displacement of the thrust plate 78.

In the second embodiment, the bolt 67 shown in FIG. 5 may be used instead of the plurality of bolts 12. Further, in the second embodiment, the bolt hole 71 shown in FIG. 6 may be used.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various aspects are described within the scope of the claims of the present invention. It can be transformed and changed.

10, 70, 75 ... Scroll compressor, 11 ... Housing, 12, 67 ... Bolt, 12A ... Head, 12B ... Shaft, 12Aa ... Bottom surface, 13 ... Main bearing, 13A, 15A ... Outer ring, 13B, 15B ... Inner ring , 13C, 15C ... Rolling element, 14 ... Drive shaft, 14A ... Base end, 14B ... Tip, 14C ... Crank pin, 15 ... Sub bearing, 17 ... Lip seal, 19 ... Driven crank mechanism, 21 ... Compressor body , 21A ... compression chamber, 23 ... rotation suppression member, 27,78 ... thrust plate, 32 ... rear housing, 34 ... front housing, 35 ... suction port, 36 ... first housing part, 37 ... second housing part, 41 ... Main bearing housing, 42 ... Plate arrangement, 42a ... Plate arrangement surface, 42A, 71 ... Bolt hole, 42B ... Notch groove, 46 ... Drive bush, 47 ... Swivel bearing, 49 ... Fixed scroll, 49A, 51A ... end plate, 49Aa, 51Aa ... one side, 49B, 51B ... lap part, 51 ... swivel scroll, 51A ... end plate, 51Ab ... other side, 51Ac ... first notch part, 51B ... wrap part, 51C ... boss part , 55 ... Ring-shaped member, 55a, 76a ... Surface, 56 ... First engaging protrusion, 57 ... Second engaging protrusion, 61 ... Plate body, 62 ... Insertion notch, 64 ... Through hole, 68 ... Protruding part, 71A ... Head housing part, 71B ... Shaft hole, 76 ... Second notch part, 76A ... Corner, 79 ... Claw part, B ... Area, E ... Circumferential direction, CL ₁ ... First Clearance, CL ₂ ... 2nd clearance, O ₁ ... Axis, W ... Width

Claims (11)

A housing with a cylindrical rear housing and a front housing that includes a plate placement surface,
A fixed scroll provided in the rear housing and fixed to the rear housing,
A swivel scroll provided in the rear housing and meshed with the fixed scroll to partition a compression chamber from the fixed scroll and revolve around the fixed scroll.
Of the swivel scrolls, a ring-shaped thrust plate arranged between an end plate arranged on the side opposite to the side where the fixed scroll is provided and the plate arrangement surface of the front housing, and
A plurality of bolts of the front housing, which are fastened to a plate arrangement portion for partitioning the plate arrangement surface and regulate the position of the thrust plate with respect to the plate arrangement surface.
With
Each of the plurality of bolts includes a head and a shaft portion to which one end is connected to the head, and at least a part of the head is arranged so as to project from the plate arrangement surface.
The thrust plate is a scroll compressor having a plurality of through holes through which the head can pass. The front housing is provided in the circumferential direction of the outer peripheral portion of the plate arrangement portion, and includes a plurality of second notches formed by cutting out the plate arrangement portion corresponding to the plate arrangement surface. ,
The scroll compressor according to claim 1, wherein the thrust plate is provided in the circumferential direction of the outer peripheral portion of the thrust plate, and has claws each arranged in the plurality of second notches in a bent state. .. The first clearance formed between the head of the bolt and the through hole of the thrust plate is a second clearance formed between the bent position of the thrust plate and the second notch. The scroll compressor according to claim 2, which is smaller than the clearance of the above. A housing with a cylindrical rear housing and a front housing that includes a plate placement surface,
A fixed scroll provided in the rear housing and fixed to the rear housing,
A swivel scroll provided in the rear housing and meshed with the fixed scroll to partition a compression chamber from the fixed scroll and revolve around the fixed scroll.
Of the swivel scrolls, a ring-shaped thrust plate arranged between an end plate arranged on the side opposite to the side where the fixed scroll is provided and the plate arrangement surface of the front housing, and
A plurality of bolts of the front housing, which are fastened to a plate arrangement portion for partitioning the plate arrangement surface and regulate the position of the thrust plate with respect to the plate arrangement surface.
With
The front housing is provided in the circumferential direction of the outer peripheral portion of the plate arrangement portion, and includes a plurality of second notches formed by cutting out the plate arrangement portion corresponding to the plate arrangement surface. ,
The thrust plate has claws that are provided in the circumferential direction of the outer peripheral portion of the thrust plate and are arranged in each of the plurality of second notches in a bent state.
The first clearance formed between the head of the bolt and the through hole of the thrust plate is a second clearance formed between the bent position of the thrust plate and the second notch. Scroll compressor smaller than the clearance of. The scroll compression according to any one of claims 2 to 4, wherein the plurality of claws are provided at positions different from the positions where the plurality of through holes provided in the thrust plate are formed in the radial direction of the thrust plate. Machine. The scroll compressor according to any one of claims 2 to 5, wherein the plurality of claw portions are arranged outside the formation positions of the plurality of through holes provided in the thrust plate. The heads of the plurality of bolts are arranged outside the swivel scroll.
The scroll compressor according to any one of claims 1 to 6, provided with a first notch portion capable of accommodating the head when the swivel scroll revolves around the outer peripheral portion of the end plate. .. The scroll compressor according to any one of claims 1 to 7, wherein the material of the plurality of bolts is a material harder than the material of the swivel scroll. The rear housing includes a suction port for sucking a fluid in the rear housing.
The scroll compressor according to any one of claims 1 to 8, wherein the plurality of bolts are provided at positions separated from the suction port in the circumferential direction of the plate arrangement portion. The plate arrangement portion of the front housing is provided with bolt holes for fastening the plurality of bolts.
The plurality of bolts are provided at the other end of the shaft portion of the plurality of bolts, have an outer diameter smaller than the outer diameter of the shaft portion, and include a protruding portion protruding in the extending direction of the shaft portion. The scroll compressor according to any one of items 1 to 9. A rotation suppressing member provided between the swivel scroll and the thrust plate, which suppresses the rotation of the swivel scroll and includes a plurality of engaging protrusions, is provided.
The thrust plate includes a plurality of insertion notches into which the engaging protrusions are inserted.
The scroll compressor according to any one of claims 1 to 10, wherein the plurality of through holes are provided at positions separated from the plurality of insertion notches.

Images