Scroll Compressor

Abstract

To inhibit wear of a bearing part and ease a contact surface pressure between a driving shaft and a support member.SOLUTION: A scroll compressor includes: a compression mechanism (20) having a fixed scroll (21) and a movable scroll (26); a driving shaft (40) for rotationally driving the movable scroll (26); and a support member (50) including a scroll support part (51) which supports the movable scroll (26), a bearing part (53) which rotatably supports the driving shaft (40), and a connection part (55) which connects the scroll support part (51) with the bearing part (53). A wall thickness (T1) of the connection part (55) is smaller than a radial wall thickness (T0) of the bearing part (53). The scroll support part (51) has a thin part (51a) which is continuous with the connection part (55) and extends in a radial direction of the driving shaft (40). An axial wall thickness (T2) of the driving shaft (40) in the thin part (51a) is smaller than or equal to the thickness (T1) of the connection part (55).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to scroll compressors. [Background technology]

[0002] BACKGROUND ART Scroll compressors that compress refrigerants are known in the art (for example, Patent Document 1).

[0003] The scroll compressor described in Patent Document 1 has an annular slit groove and a thin outer diameter portion at the end of the journal bearing, which reduces the rigidity of both ends of the journal bearing and allows the journal bearing to deform along the drive shaft when the drive shaft makes uneven contact, thereby mitigating the uneven contact. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-097458 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when the load on the drive shaft increases as the capacity of the scroll compressor increases, there is a risk that the journal bearing (bearing portion) will wear out due to the high contact pressure between the drive shaft and the journal bearing.

[0006] An object of the present disclosure is to reduce the contact surface pressure between the drive shaft and the support member while suppressing wear of the bearing portion. [Means for solving the problem]

[0007] A first aspect of the present disclosure is directed to a scroll compressor. The scroll compressor includes a compression mechanism (20) having a fixed scroll (21) and a movable scroll (26), a drive shaft (40) for rotationally driving the movable scroll (26), and a support member (50) including a scroll support portion (51) supporting the movable scroll (26), a bearing portion (53) rotatably supporting the drive shaft (40), and a connecting portion (55) connecting the scroll support portion (51) and the bearing portion (53), wherein a thickness (T1) of the connecting portion (55) is thinner than a radial thickness (T0) of the bearing portion (53), the scroll support portion (51) has a thin portion (51a) that is continuous with the connecting portion (55) and extends in the radial direction of the drive shaft (40), and a thickness (T2) of the thin portion (51a) in the axial direction of the drive shaft (40) is equal to or smaller than the thickness (T1) of the connecting portion (55).

[0008] In the first aspect, it is possible to reduce the contact surface pressure between the drive shaft (40) and the support member (50) while suppressing wear of the bearing portion (53).

[0009] A second aspect of the present disclosure is characterized in that, in the first aspect, the bearing portion (53) includes an annular slit portion (53c) formed in an annular shape around the axis of the drive shaft (40).

[0010] In the second embodiment, the contact pressure between the drive shaft (40) and the support member (50) can be reduced by using both the thin-walled portion (51a) and the annular slit portion (53c).

[0011] A third aspect of the present disclosure is characterized in that in the second aspect, the thin-walled portion (51a) of the scroll support portion (51) is provided on the outer circumferential side of the annular slit portion (53c).

[0012] In the third embodiment, the thin portion (51a) and the annular slit portion (53c) can be provided at different locations.

[0013] A fourth aspect of the present disclosure is characterized in that, in any one of the first to third aspects, a crank chamber (80) is provided at a connection portion between the movable scroll (26) and the drive shaft (40), the crank chamber (80) includes a bulging portion (81) that bulges in a radial direction of the drive shaft (40) from below the vertical center of the crank chamber (80), and the thin-walled portion (51 a) is provided along the bulging portion (81).

[0014] In the fourth aspect, the thickness (T2) of the thin portion (51a) can be made thin.

[0015] A fifth aspect of the present disclosure is characterized in that, in the fourth aspect, the crank chamber (80) is provided inside the scroll support portion (51), and the thin-walled portion (51a) of the scroll support portion (51) is provided below the bulge portion (81) of the crank chamber (80).

[0016] In the fifth embodiment, the thin portion (51a) can be elastically deformed by using the space of the bulge (81).

[0017] A sixth aspect of the present disclosure is characterized in that, in any one of the first to fifth aspects, the support member (50) includes a floating member (50) that presses the movable scroll (26) against the fixed scroll (21).

[0018] In the sixth aspect, the contact pressure between the drive shaft (40) and the floating member (50) can be reduced while suppressing wear of the bearing portion (53). [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a cross-sectional view of a scroll compressor according to an embodiment of the present invention. [Figure 2] FIG. 2 is a partially enlarged cross-sectional view of the scroll compressor shown in FIG. [Figure 3] FIG. 3 is a partially enlarged cross-sectional view of the scroll compressor shown in FIG. [Figure 4] FIG. 4 is a diagram showing the results of a test investigating the relationship between the contact surface pressure between the drive shaft and the floating member and the inclination of the drive shaft. [Figure 5] FIG. 5 is a cross-sectional view showing a modified example of the connecting portion of the floating member. DETAILED DESCRIPTION OF THE INVENTION

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the accompanying drawings. In the drawings, the same or corresponding parts are designated by the same reference numerals, and detailed descriptions thereof and accompanying effects will not be repeated.

[0021] A scroll compressor (1) according to an embodiment of the present invention will be described with reference to Fig. 1. Fig. 1 is a cross-sectional view of the scroll compressor (1) according to an embodiment of the present invention.

[0022] The scroll compressor (1) is applied to, for example, a refrigeration system. Refrigeration systems include air conditioners that adjust the temperature and humidity of air, cooling systems that cool the interior of a refrigerator, and hot water supply systems that generate hot water. The scroll compressor (1) is provided in a refrigerant circuit (not shown) of a vapor compression refrigeration cycle and compresses a refrigerant, which is a working fluid. In the refrigerant circuit, the refrigerant compressed by the scroll compressor (1) is condensed in a condenser, decompressed in a decompression mechanism, evaporated in an evaporator, and then sucked into the scroll compressor (1).

[0023] As shown in FIG. 1, the scroll compressor (1) includes a casing (10), a compression mechanism (20), an electric motor (30), a drive shaft (40), a floating member (50), and a frame (60).

[0024] The casing (10) is formed in the shape of a vertically elongated cylinder with both ends closed. The casing (10) accommodates a compression mechanism (20), an electric motor (30), a drive shaft (40), a floating member (50), and a frame (60). The compression mechanism (20) and the electric motor (30) are connected by the drive shaft (40). The drive shaft (40) extends along the axial direction of the casing (10). In this embodiment, the axial direction of the casing (10) indicates the up-down direction.

[0025] A partition member (11) is provided in the upper part of the casing (10). The partition member (11) divides the internal space of the casing (10) into two spaces. The space above the partition member (11) forms a first casing space (S1). The space below the partition member (11) forms a second casing space (S2).

[0026] The casing (10) is provided with a suction pipe (not shown) and a discharge pipe (12). The suction pipe radially penetrates the body of the casing (10) and communicates with the second casing space (S2). The suction pipe introduces a low-pressure fluid (e.g., gas refrigerant) into the second casing space (S2). The discharge pipe (12) radially penetrates the upper part of the casing (10) and communicates with the first casing space (S1). The discharge pipe (12) discharges the high-pressure fluid in the first casing space (S1) to the outside of the casing (10).

[0027] The compression mechanism (20) draws in and compresses a fluid. The compression mechanism (20) has a fixed scroll (21) and a movable scroll (26). The fixed scroll (21) is fixed to a frame (60). The movable scroll (26) is disposed between the floating member (50) and the fixed scroll (21). The movable scroll (26) is configured to mesh with the fixed scroll (21) and to perform eccentric rotational motion relative to the fixed scroll (21).

[0028] The fixed scroll (21) is disposed on one side (upper side in this example) in the axial direction of the frame (60). The fixed scroll (21) has a fixed end plate (22), a fixed wrap (23), and an outer peripheral wall portion (24).

[0029] The fixed side head 22 is formed in a generally circular plate shape. The fixed side wrap 23 is formed in a spiral wall shape that describes an involute curve and protrudes from the front surface (lower surface in this example) of the fixed side head 22. The outer peripheral wall portion 24 is formed to surround the outer periphery of the fixed side wrap 23 and protrudes from the front surface of the fixed side head 22. The tip surface (lower end surface in this example) of the fixed side wrap 23 and the tip surface of the outer peripheral wall portion 24 are approximately flush with each other.

[0030] An intake port (not shown) is formed in the outer peripheral wall portion (24) of the fixed scroll (21). The intake port communicates with the second casing space (S2). A discharge port (25) is formed in the center of the fixed end plate (22) of the fixed scroll (21) and penetrates the fixed end plate (22) in the thickness direction.

[0031] The movable scroll (26) has a movable end plate (27), a movable wrap (28), and a boss portion (29).

[0032] The movable end plate (27) is formed in a generally circular plate shape. The movable wrap (28) is formed in a spiral wall shape that describes an involute curve and protrudes from the front surface (in this example, the upper surface) of the movable end plate (27). The boss portion (29) is formed in a cylindrical shape and is disposed in the center of the back surface (in this example, the lower surface) of the movable end plate (27). The movable wrap (28) of the movable scroll (26) is engaged with the fixed wrap (23) of the fixed scroll (21).

[0033] With this configuration, a compression chamber (S20) is formed between the fixed scroll (21) and the movable scroll (26). The compression chamber (S20) is a space for compressing a fluid. The compression chamber (S20) is configured to compress the fluid sucked through the suction pipe, the second casing space (S2), and the suction port, and to discharge the compressed fluid through the discharge port (25).

[0034] The electric motor (30) is housed in the casing (10) and disposed below the compression mechanism (20). The electric motor (30) has a stator (31) and a rotor (32). The stator (31) is formed in a substantially cylindrical shape and is fixed to the casing (10). The rotor (32) is rotatably inserted into the inner periphery of the stator (31). A drive shaft (40) is inserted into and fixed to the inner periphery of the rotor (32).

[0035] The drive shaft (40) drives the movable scroll (26). The drive shaft (40) is connected to the movable scroll (26) and rotatably supports the movable scroll (26). The drive shaft (40) has a main shaft portion (41) and an eccentric shaft portion (42). The main shaft portion (41) extends in the axial direction (vertical direction) of the casing (10). The eccentric shaft portion (42) is provided at the upper end of the main shaft portion (41). The outer diameter of the eccentric shaft portion (42) is smaller than the outer diameter of the main shaft portion (41). The axis of the eccentric shaft portion (42) is eccentric by a predetermined distance from the axis (41a) of the drive shaft (40) (see FIG. 2). The axis (41a) of the drive shaft (40) specifically refers to the axis (41a) of the main shaft portion (41) of the drive shaft (40). The eccentric shaft portion (42) is inserted into the boss portion (29) of the movable scroll (26), thereby connecting the movable scroll (26) and the drive shaft (40).

[0036] The floating member (50) presses the movable scroll (26) against the fixed scroll (21). The floating member (50) is formed in a substantially cylindrical shape. The floating member (50) has a scroll support portion (51), a bearing portion (53), and a connecting portion (55). The floating member (50) is an example of a support member of the present invention.

[0037] The scroll support portion (51) is a substantially cylindrical portion that comes into contact with the back surface of the movable scroll (26). The scroll support portion (51) supports the movable scroll (26). A first annular groove (52) that accommodates an O-ring is formed near the lower end of the outer wall of the scroll support portion (51).

[0038] The bearing portion (53), which is a journal bearing, rotatably supports the drive shaft (40). The bearing portion (53) is a substantially cylindrical portion having an inner diameter smaller than that of the scroll support portion (51). The bearing portion (53) rotatably supports the main shaft portion (41) of the drive shaft (40). The bearing portion (53) has an inner circumferential surface (53e) that faces the outer circumferential surface of the main shaft portion (41). A second annular groove (54) that accommodates an O-ring is formed near the upper end of the outer wall of the bearing portion (53).

[0039] The connecting portion (55) is a portion formed substantially in a ring shape. The connecting portion (55) connects the scroll support portion (51) and the bearing portion (53). The connecting portion (55) is located closer to the axis (41 a) of the drive shaft (40) than the upper end portion (53 f) of the outer circumferential surface (53 b) of the bearing portion (53).

[0040] The frame (60) supports the floating member (50). The frame (60) is formed in a substantially cylindrical shape. The frame (60) is fixed to the casing (10) in the second casing space (S2) by, for example, press-fitting. The frame (60) has a fixing portion (61) and a protruding portion (62).

[0041] The fixed portion (61) is a portion formed in a substantially cylindrical shape. The outer peripheral surface of the fixed portion (61) is fixed to the casing (10). The fixed scroll (21) is fixed to the upper surface of the fixed portion (61).

[0042] The protruding portion 62 is a portion formed substantially in a cylindrical or ring shape. The protruding portion 62 protrudes radially inward from the inner periphery of the fixing portion 61. A third annular groove 63 for accommodating an O-ring is formed near the inner periphery of the upper surface of the protruding portion 62.

[0043] A through hole 64 is formed radially inward of the protrusion 62. The drive shaft 40 and the bearing 53 are inserted through the through hole 64.

[0044] A high pressure space (71) and an intermediate pressure space (72) are formed between the floating member (50) and the frame (60).

[0045] The high-pressure space (71) is formed between the connecting portion (55) and the bearing portion (53) of the floating member (50) and the protruding portion (62) of the frame (60). The high-pressure space (71) is located on the outer periphery side of the bearing portion (53) and between the floating member (50) and the frame (60). The high-pressure space (71) is partitioned by an O-ring (not shown) accommodated in the second annular groove (54) and an O-ring (not shown) accommodated in the third annular groove (63). The high-pressure space (71) extends around the entire circumferential direction of the casing (10). A high pressure, which is the pressure of the fluid compressed by the compression mechanism (20), is introduced into the high-pressure space (71).

[0046] An intermediate pressure space (72) is formed on the outer circumferential side of the high pressure space (71). The high pressure space (71) and the intermediate pressure space (72) are separated from each other by an O-ring (not shown) received in the third annular groove (63).

[0047] A first inlet passage (not shown) is formed inside the fixed scroll (21) and the frame (60). An inlet end of the first inlet passage opens to the discharge port (25). An outlet end of the first inlet passage opens to the high-pressure space (71).

[0048] The intermediate pressure space (72) is formed between the scroll support portion (51) and the connecting portion (55) of the floating member (50) and the protruding portion (62) of the frame (60). The intermediate pressure space (72) is located on the outer circumferential side of the high-pressure space (71) and between the floating member (50) and the frame (60). The intermediate pressure space (72) is partitioned by an O-ring (not shown) accommodated in the first annular groove (52) and an O-ring (not shown) accommodated in the third annular groove (63). The intermediate pressure space (72) extends around the entire circumferential direction of the casing (10). An intermediate pressure, whose pressure is higher than the pressure of the fluid sucked into the compression mechanism (20) and lower than the pressure (high pressure) of the fluid discharged from the compression mechanism (20), is introduced into the intermediate pressure space (72).

[0049] A second introduction passage (not shown) is formed inside the fixed scroll (21) and the frame (60). An inlet end of the second introduction passage opens into the compression chamber (S20). An outlet end of the second introduction passage opens into the intermediate pressure space (72).

[0050] The operation of the scroll compressor (1) will be described.

[0051] As shown in Fig. 1, when power is supplied to the electric motor (30), the rotor (32) of the electric motor (30) rotates, thereby rotating the drive shaft (40). The rotation of the drive shaft (40) causes the movable scroll (26) connected to the drive shaft (40) to perform eccentric rotation relative to the fixed scroll (21). As a result, low-pressure fluid is sucked into the compression chamber (S20) through the suction pipe and the second casing space (S2) and compressed in the compression chamber (S20). The compressed fluid is discharged from the discharge pipe (12) through the discharge port (25) and the first casing space (S1).

[0052] The compressed fluid flows into the first inlet passage from the discharge port (25). The fluid is guided through the first inlet passage to the high-pressure space (71). A high pressure (high pressure) is generated in the high-pressure space (71), and the high pressure presses the movable scroll (26) against the fixed scroll (21) via the floating member (50).

[0053] The fluid being compressed flows into the second inlet passage from the compression chamber (S20). This fluid is guided through the second inlet passage to the intermediate pressure space (72). A slightly high pressure (intermediate pressure) is generated in the intermediate pressure space (72), and the intermediate pressure presses the movable scroll (26) against the fixed scroll (21) via the floating member (50).

[0054] The scroll compressor (1) will be further described with reference to Figures 2 and 3. Figures 2 and 3 are enlarged views of parts of the scroll compressor (1) shown in Figure 1.

[0055] 2 and 3, the casing (10) includes a crank chamber (80). The crank chamber (80) is a hollow space that accommodates the boss portion (29) of the movable scroll (26). The crank chamber (80) is provided at a connection portion between the movable scroll (26) and the drive shaft (40).

[0056] The crank chamber (80) includes a bulging portion (81). The bulging portion (81) has a shape that bulges in the radial direction of the drive shaft (40) from a lower side (82) of the crank chamber (80) than the vertical center. The radial direction of the drive shaft (40) is perpendicular to the axial center (41a) of the drive shaft (40). The bulging portion (81) is formed in an annular shape around the axial center (41a). In this embodiment, the bulging portion (81) is provided on the outer periphery of the upper part of the main shaft portion (41).

[0057] The scroll support portion (51) of the floating member (50) has a thin portion (51a). The thin portion (51a) is provided at the lower part of the scroll support portion (51) and is disposed between the bulging portion (81) of the crank chamber (80) and the frame (60). There is a bulging portion (81) above the thin portion (51a), and there is a frame (60) below the thin portion (51a). The thin portion (51a) is continuous with the connecting portion (55) and extends in the radial direction of the drive shaft (40). The thin portion (51a) is provided along the bulging portion (81). The thin portion (51a) is formed in an annular shape around the axis (41a) of the drive shaft (40).

[0058] The connecting portion (55) includes an inclined portion (56b). The inclined portion (56b) From the upper part (53a) of the bearing part (53) to the thin part (51a) has a shape that inclines outward in the radial direction of the drive shaft (40) with respect to the axial direction of the drive shaft (40) toward. The axial direction of the drive shaft (40) indicates a direction parallel to the axis (41a) of the drive shaft (40). In the present embodiment, the axial direction of the drive shaft (40) is the vertical direction.

[0059] The wall thickness (T1) of the connecting portion (55) is thinner than the radial wall thickness (T0) of the bearing portion (53) (T1 < T0). As shown in FIG. 3, The connecting part (55) when it is composed of the inclined portion (56b), Connecting part (55) the wall thickness (T1) indicates the wall thickness in a direction perpendicular to the inner peripheral surface (55a) of the inclined portion (56b).

[0060] The axial wall thickness (T2) of the drive shaft (40) in the thin portion (51a) is less than or equal to the wall thickness (T1) of the connecting portion (55) (T2 ≦ T1).

[0061] The bearing portion (53) of the floating member (50) has an annular slit portion (53c). The annular slit portion (53c) is provided in the upper portion (53a) of the bearing portion (53) and has a shape in which a part of the upper portion (53a) of the bearing portion (53) is recessed. The annular slit portion (53c) is formed in an annular shape around the axis (41a) of the drive shaft (40). A thin portion (51a) is provided on the outer peripheral side of the annular slit portion (53c).

[0062] FIG. 4 is a diagram showing the test results of examining the relationship between the contact surface pressure between the drive shaft (40) and the floating member (50) and the inclination of the drive shaft (40). In the coordinate system shown in FIG. 4, the vertical axis represents the contact surface pressure between the drive shaft (40) and the floating member (50), and the horizontal axis represents the inclination of the drive shaft (40). In FIG. 4, the solid line graph A shows the test results when using the floating member (50) having both the thin portion (51a) and the annular slit portion (53c). The dashed-dotted line graph B shows the test results when using the floating member (50) having the annular slit portion (53c) but not having the thin portion (51a). The dotted line graph C shows the test results when using the floating member (50) not having both the thin portion (51a) and the annular slit portion (53c).

[0063] As shown in FIG. 4, in the order of graph A, graph B, and graph C, the ratio of the increase in the contact surface pressure between the drive shaft (40) and the floating member (50) with respect to the increase in the inclination of the drive shaft (40) becomes larger. Thereby, in the order of graph A, graph B, and graph C, the increase in the contact surface pressure with respect to the increase in the inclination of the drive shaft (40) can be suppressed, and good test results were obtained from the viewpoint of suppressing the increase in the contact surface pressure.

[0064] - Effects of the present embodiment - As described above, the thickness (T1) of the connecting portion (55) is thinner than the radial thickness (T0) of the bearing portion (53) (T1 < T0), and the axial thickness (T2) of the drive shaft (40) in the thin portion (51a) is less than or equal to the thickness (T1) of the connecting portion (55) (T2 ≦ T1). Thereby, when the drive shaft (40) is inclined, the drive shaft (40) comes into a single-contact state with respect to the scroll support portion (51) which is a support member, but the thin portion (51a) can be effectively elastically deformed in accordance with the inclination of the drive shaft (40). As a result, the contact surface pressure between the drive shaft (40) and the floating member (50) can be relaxed. Further, since the thin portion (51a) of the scroll support portion (51) is elastically deformed, the load applied to the bearing portion (53) can be reduced, and the contact surface pressure between the drive shaft (40) and the floating member (50) can be relaxed while suppressing the wear of the bearing portion (53).

[0065] The bearing portion (53) of the floating member (50) includes an annular slit portion (53c) formed in an annular shape around the axial center (41a) of the drive shaft (40). This allows not only the thin-walled portion (51a) of the scroll support portion (51) to elastically deform, but also the thin-walled portion of the bearing portion (53) on the outer periphery of the annular slit portion (53c) to elastically deform, thereby allowing the bearing portion (53) to adapt to the inclination of the drive shaft (40). As a result, the contact pressure between the drive shaft (40) and the floating member (50) can be reduced. Furthermore, since the contact pressure between the drive shaft (40) and the floating member (50) is reduced using both the thin-walled portion (51a) and the annular slit portion (53c), the load on the bearing portion (53) can be reduced, thereby reducing the contact pressure while suppressing wear on the bearing portion (53).

[0066] Furthermore, the crank chamber (80) has the bulging portion (81) formed on the lower side (82) of the crank chamber (80) from the vertical center, so that the thickness (T2) of the thin portion (51a) can be made thin.

[0067] A crank chamber (80) is provided inside the scroll support portion (51), and the thin-walled portion (51a) of the scroll support portion (51) is provided below the bulging portion (81) of the crank chamber (80). This allows the thin-walled portion (51a) to elastically deform using the space of the bulging portion (81).

[0068] -Variation- A modified example of the connecting portion (55) of the floating member (50) will be described with reference to FIG.

[0069] 5, in this modification, the connecting portion 55 has a vertical portion 56a and an inclined portion 56b. The vertical portion 56a extends upward from the upper portion 53a of the bearing portion 53.

[0070] In the case where the connecting portion (55) has a vertical portion (56a) and an inclined portion (56b) as in the modified example, the thickness (T1) of the connecting portion (55) indicates the thickness of the vertical portion (56a) in the radial direction of the drive shaft (40) (left-right direction in Figure 5).

[0071] Although the embodiments and modifications have been described above, it will be understood that various modifications of form and details are possible without departing from the spirit and scope of the claims (for example, (1) and (2) below). Furthermore, the above embodiments and modifications may be combined or substituted as appropriate as long as the functionality of the subject matter of the present disclosure is not impaired.

[0072] (1) In this embodiment and the modified example, the floating member 50 is provided with both the thin-walled portion 51 a and the annular slit portion 53 c. However, the present invention is not limited to this. It is sufficient that the floating member 50 is provided with at least the thin-walled portion 51 a of the thin-walled portion 51 a and the annular slit portion 53 c.

[0073] (2) In this embodiment and its modified examples, the scroll compressor (1) includes a floating member (50). However, the present invention is not limited to this. In this embodiment and its modified examples, the scroll compressor (1) does not necessarily include a floating member (50). That is, the support member of the present invention is not limited to a member movable relative to the casing (10), such as the floating member (50), but may be a member fixed to the casing (10). In this case, the high pressure introduced into the high-pressure space (71) and the intermediate pressure introduced into the intermediate-pressure space (72) are configured to directly act on the back surface of the movable scroll (26). [Industrial Applicability]

[0074] As described above, the present disclosure is useful for scroll compressors. [Explanation of symbols]

[0075] 1 Scroll compressor 20 Compression mechanism 21 Fixed Scroll 26 Movable scroll 40 Drive shaft 50 Support member, floating member 51 Scroll support part 51a Thin wall part 53 Bearing section 53c Circular slit 55 Connecting part 80 Crankcase 81 Bulge T0 Radial thickness of bearing T1 Thickness of connecting part T2 Axial thickness of drive shaft

Claims

1. a compression mechanism (20) having a fixed scroll (21) and a movable scroll (26); a drive shaft (40) for driving the movable scroll (26) to rotate; a support member (50) including a scroll support (51) that supports the movable scroll (26), a bearing (53) that rotatably supports the drive shaft (40), and a connecting portion (55) that connects the scroll support (51) and the bearing (53) and is disposed on an upper portion (53a) of the bearing (53); Equipped with a wall thickness (T1) of the connecting portion (55) is smaller than a wall thickness (T0) in the radial direction of the bearing portion (53); The scroll support portion (51) is continuous with the connecting portion (55) and has a thin-walled portion (51a) extending in the radial direction of the drive shaft (40), a thickness (T2) of the thin-walled portion (51a) in the axial direction of the drive shaft (40) is equal to or smaller than a thickness (T1) of the connecting portion (55); The tilt of the drive shaft (40) causes the thin portion (51a) to elastically deform, The bearing portion (53) includes an annular slit portion (53c) formed in an annular shape around the axis of the drive shaft (40), The connecting portion (55) includes an inclined portion (56b) inclined from an upper portion (53a) of the bearing portion (53) toward the thin-walled portion (51a) with respect to the axial direction of the drive shaft (40), The thickness (T1) of the connecting portion (55) indicates the thickness of the inclined portion (56b) in a direction perpendicular to the inner circumferential surface (55a) of the inclined portion (56b), The scroll compressor, wherein the connecting portion (55) is provided on the outer circumferential side of the annular slit portion (53c).

2. a compression mechanism (20) having a fixed scroll (21) and a movable scroll (26); a drive shaft (40) for driving the movable scroll (26) to rotate; a support member (50) including a scroll support (51) that supports the movable scroll (26), a bearing (53) that rotatably supports the drive shaft (40), and a connecting portion (55) that connects the scroll support (51) and the bearing (53) and is disposed on an upper portion (53a) of the bearing (53); Equipped with a wall thickness (T1) of the connecting portion (55) is smaller than a wall thickness (T0) in the radial direction of the bearing portion (53); The scroll support portion (51) is continuous with the connecting portion (55) and has a thin-walled portion (51a) extending in the radial direction of the drive shaft (40), a thickness (T2) of the thin-walled portion (51a) in the axial direction of the drive shaft (40) is equal to or smaller than a thickness (T1) of the connecting portion (55); The tilt of the drive shaft (40) causes the thin portion (51a) to elastically deform, The bearing portion (53) includes an annular slit portion (53c) formed in an annular shape around the axis of the drive shaft (40), The connecting portion (55) includes a vertical portion (56a) extending upward from an upper portion (53a) of the bearing portion (53), and an inclined portion (56b) inclined with respect to the axial direction of the drive shaft (40) from an upper end of the vertical portion (56a) toward the thin-walled portion (51a), The thickness (T1) of the connecting portion (55) indicates the thickness of the vertical portion (56a) in the radial direction, The scroll compressor, wherein the connecting portion (55) is provided on the outer circumferential side of the annular slit portion (53c).

3. In claim 1 or claim 2, A crank chamber (80) is provided at a connection between the movable scroll (26) and the drive shaft (40), The crank chamber (80) includes a bulging portion (81) that bulges in the radial direction of the drive shaft (40) from below the vertical center of the crank chamber (80), The scroll compressor is characterized in that the thin-walled portion (51a) is provided along the bulging portion (81).

4. In claim 3, The crank chamber (80) is provided inside the scroll support part (51), The scroll compressor is characterized in that the thin-walled portion (51a) of the scroll support (51) is provided below the bulging portion (81) of the crank chamber (80).

5. In any one of claims 1 to 4, The scroll compressor is characterized in that the support member (50) is a floating member (50) that presses the movable scroll (26) against the fixed scroll (21).

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