Bush assembly and compressor having same

Abstract

A bush assembly and a compressor having same, of the present invention, are for improving the coupling structure of a slide bush and a balance weight such that same can be both easily coupled and accurately coupled at the correct position. To this end, the bush assembly and the compressor having same, of the present invention, comprise the bush assembly comprising: a slide bush inserted into an eccentric pin and provided at a coupling portion between the eccentric pin and a second scroll; and a balance weight coupled to the slide bush so as to provide a centrifugal force, wherein the slide bush of the bush assembly has a coupling flange to be coupled to a portion of the balance weight.

Description

Bush assembly and compressor having the same

[0001] The present invention relates to a bushing assembly combined with a balance weight and a compressor having the same.

[0002] Generally, a compressor is a device or apparatus used for generating high pressure or transporting high-pressure fluids. Compressors applied in refrigeration cycles, such as those found in refrigerators or air conditioners, perform the function of compressing refrigerant gas and transferring it to the condenser.

[0003] A scroll compressor is a type of compressor in which the rotating scroll among two scrolls installed facing each other rotates around the stationary scroll, and the compression chamber created between the wraps of each scroll gradually narrows to compress the refrigerant.

[0004] The pivot scroll of this scroll compressor is eccentrically coupled to the rotation axis and pivots around the axis center of the rotation axis.

[0005] A slide bush is provided at the joint between the above-mentioned rotation axis and the pivot scroll.

[0006] If the weight of the above-mentioned rotating scroll increases or the operating speed is high, the wrap of the rotating scroll may be damaged by the centrifugal force of the rotating scroll, or power consumption may increase due to friction with the fixed scroll.

[0007] Accordingly, conventionally, a balance weight for adjusting rotational imbalance in the slide bushing is provided. In this regard, various such methods are provided, including Registered Patent No. 10-0147097, Published Patent No. 10-2010-0123689, Published Patent No. 10-2021-0090492, Published Patent No. 10-2021-0149955, and Registered Patent No. 10-0289429.

[0008] The above balance weight is formed as an injection-molded metal product and is integrated with the above slide bushing through mutual connection to be managed as a single product.

[0009] Conventionally, in order to integrate the balance weight and the slide bushing, the slide bushing was press-fitted into the balance weight. That is, the slide bushing was press-fitted into a press-fit hole formed in the balance weight to integrate them.

[0010] During the process of pressing the slide bushing into the balance weight in this manner, there was a problem in which stress was concentrated in specific parts of the coupling hole formed on the inner circumference of the slide bushing. In particular, since the slide bushing is formed from a sintered body, there was a problem in which damage, such as cracking or deformation, occurred in the area where the stress was concentrated.

[0011] In addition, when the slide bushing is integrated by press-fitting it into the balance weight, there was a problem in accurately aligning the orientation of the slide bushing. That is, the method of press-fitting the slide bushing can cause problems such as the slide bushing deviating from its proper position in the circumferential direction or tilting from the axial direction.

[0012] In particular, if the slide bushing rotates or tilts in this way, the direction of the centrifugal force of the balance waiter deviates from the direction of the centrifugal force of the scroll, which may result in a problem where the centrifugal force of the scroll cannot be relieved.

[0013] The present invention was devised to solve various problems according to the aforementioned prior art.

[0014] The objective of the present invention is to prevent deformation caused during the process of integrating the slide bushing with the balance weight.

[0015] The objective of the present invention is to enable the slide bushing to be accurately coupled to the balance weight in its correct position without rotating from its correct position.

[0016] The objective of the present invention is to enable the slide bushing to be accurately coupled to the balance weight in the correct position without tilting.

[0017] The objective of the present invention is to enable the process of integrating the slide bushing with the balance weight to be performed accurately and simply.

[0018] The objective of the present invention is to enable easy quality control of the bush assembly, reduce material costs, and shorten the production period.

[0019] According to the compressor of the present invention for achieving the above objective, a slide bush and a balance weight for providing centrifugal force to a scroll when the slide bush rotates are joined by a bolt connection to form a bush assembly.

[0020] According to the compressor of the present invention, a connecting flange may be provided on the slide bush. The slide bush and the balance weight may be connected by this connecting flange.

[0021] According to the compressor of the present invention, the coupling flange of the slide bush can be in surface contact with a part of the balance weight. By means of this coupling flange, the slide bush and the balance weight can be stably coupled.

[0022] According to the compressor of the present invention, the coupling flange of the slide bushing can be formed to make surface contact with a portion of the bottom surface of the balance weight. Due to the coupling position of this coupling flange and the balance weight, the operation for coupling them can be easily performed.

[0023] According to the compressor of the present invention, the balance weight may include a gripping projection. By means of such a gripping projection, the bushing assembly may be coupled to the boss of the second scroll.

[0024] According to the compressor of the present invention, the gripping projection may be formed to be spaced apart from a portion of the circumferential surface of the slide bush. By the structure of such a gripping projection, a gap for coupling with the second scroll may be provided between the slide bush and the gripping projection.

[0025] According to the compressor of the present invention, the balance weight may include a protrusion. This protrusion can provide centrifugal force in a direction opposite to the direction of action of the centrifugal force acting on the second scroll during the pivoting motion of the second scroll.

[0026] According to the compressor of the present invention, the protrusion may be formed to extend from the outer circumferential surface of the gripping protrusion. The structure of such a protrusion can provide centrifugal force in the direction of extension.

[0027] According to the compressor of the present invention, the coupling flange of the slide bushing can be formed on the bottom surface of the protrusion. With this structure, assembly work for coupling the slide bushing and the balance weight can be easily performed.

[0028] According to the compressor of the present invention, a seating ledge may be formed on the bottom surface of the protrusion of the balance weight. The coupling position for the coupling flange of the slide bushing can be accurately distinguished on this seating ledge.

[0029] According to the compressor of the present invention, the seating ledge formed on the balance weight can be formed to protrude downward from the bottom surface of the protrusion. This allows the operator to accurately recognize whether the coupling flange is aligned with the seating ledge.

[0030] According to the compressor of the present invention, the coupling flange and the seating jaw can be fastened with bolts. By such bolt fastening, the balance weight and the slide bushing can be selectively coupled or separated.

[0031] According to the compressor of the present invention, the slide bush can be fastened with a plurality of bolts so that it does not deviate from its original position while rotating when the bolt is fastened.

[0032] According to the compressor of the present invention, the coupling flange of the slide bushing can be coupled to the inner circumference portion of the bottom surface of the protrusion of the balance weight. By doing so, the protrusion can be provided as a site for the actual application of centrifugal force.

[0033] According to the compressor of the present invention, the seating flange can be formed along the inner circumference of the protrusion. This allows the coupling flange of the slide bushing to be coupled to the inner circumference of the protrusion.

[0034] According to the compressor of the present invention, the coupling flange and the seating jaw may be formed with the same or similar shape. By verifying whether these two structures match, the correct positional coupling of the slide bushing and the balance weight can be recognized.

[0035] According to the compressor of the present invention, the coupling flange and the seating ledge can be formed so that their periphery surfaces align with each other. This allows the operator to more accurately verify whether the coupling flange and the seating ledge align.

[0036] According to the compressor of the present invention, the protrusion and the coupling flange can be formed in an arc shape that forms a concentric circle. As a result, the direction of the centrifugal force acting on the protrusion and the direction of the centrifugal force acting on the coupling flange can be aligned.

[0037] According to the compressor of the present invention, a coupling flange can be formed around the lower circumference of the slide bush. This allows for maximizing the contact surface with the boss of the second scroll inserted between the outer surface of the slide bush and the inner surface of the gripping projection.

[0038] According to the compressor of the present invention, the coupling flange can be formed in an arc shape while protruding radially from the circumferential surface of the slide bush. This enables the coupling flange to provide centrifugal force in the same direction as the protrusion of the balance weight.

[0039] According to the compressor of the present invention, oil pumped along the rotating shaft can be discharged into a space within the compressor through a joint with a slide boss. To this end, a drainage channel for discharging oil can be formed in the joint flange.

[0040] According to the compressor of the present invention, the drainage channel can be formed as a recess on the bottom surface of the coupling flange.

[0041] According to the compressor of the present invention, the drainage channel can be formed to communicate with the inner surface of the slide bush.

[0042] According to the compressor of the present invention, the drainage path can be formed to be directed radially from the center of the slide bush.

[0043] According to the bushing assembly of the present invention for achieving the above-mentioned purpose, it comprises a slide bushing coupled to an eccentric portion; and a balance weight coupled to the slide bushing to provide centrifugal force, wherein the slide bushing may be provided with a coupling flange for coupling with the balance weight. By means of such a coupling flange, the slide bushing and the balance weight can be coupled to each other to form an integrated unit.

[0044] According to the bush assembly of the present invention, the coupling flange can be formed to be coupled while matching a part of the blend weight.

[0045] According to the bushing assembly of the present invention, the balance weight may include a gripping projection that is spaced apart from a portion of the circumferential surface of the slide bushing and forms a concentric circle with said circumferential surface, and an arc-shaped protrusion that extends from the outer circumferential surface of said gripping projection to provide centrifugal force.

[0046] According to the bush assembly of the present invention, the coupling flange of the slide bush can be bolted together while matching a portion of the bottom surface of the protrusion.

[0047] According to the bush assembly of the present invention, an inclined surface may be formed on the coupling flange to guide the scattering of oil.

[0048] According to the bush assembly of the present invention, inclined surfaces that guide oil scattering can be formed at each corner of the coupling flange.

[0049] As described above, since the slide bush and the balance weight are fastened together by bolts in the bush assembly of the present invention, deformation caused during the process of integrating the slide bush with the balance weight can be prevented.

[0050] In addition, since the bushing assembly of the present invention is provided with multiple bolt fastening portions, the slide bushing can be accurately coupled to the balance weight in its correct position without rotating from its correct position.

[0051] In addition, since the bushing assembly of the present invention fastens the contact portion after the connecting flange of the slide bushing is pressed against the balance weight, the slide bushing can be accurately coupled to the balance weight in the correct position without tilting. In particular, tilting of the slide bushing can be prevented by pressing the connecting flange against the bottom surface of the protrusion forming the balance weight.

[0052] In addition, since the slide bush and the balance weight of the bush assembly of the present invention are fastened together with bolts, the operation can be performed accurately and simply. Along with this, manufacturing quality control of the bush assembly is easy, and material costs can be reduced and the production period shortened.

[0053] In addition, since the bushing assembly of the present invention has a drainage channel formed on the bottom surface of the coupling flange, the oil pumped along the rotating shaft can be supplied more smoothly to the operating space inside the compressor.

[0054] In addition, the bushing assembly of the present invention has a seating projection formed on the lower surface of the protrusion of the balance weight, and the coupling flange is coupled to the seating projection, thereby allowing the operator to accurately recognize the coupling positions of each other. Along with this, the operator can accurately identify any coupling defects.

[0055] FIG. 1 is an internal cross-sectional view of a compressor of an embodiment of the present invention.

[0056] FIG. 2 is a cross-sectional view of the key parts regarding the relationship between the second scroll, the rotating shaft, and the bushing assembly constituting the compressor of an embodiment of the present invention.

[0057] FIG. 3 is a perspective view of a bushing assembly of an embodiment of the present invention.

[0058] FIG. 4 is an exploded perspective view of a bushing assembly of an embodiment of the present invention.

[0059] FIG. 5 is a perspective view of a bushing assembly of an embodiment of the present invention in a direction different from FIG. 3.

[0060] FIG. 6 is an exploded perspective view of a bushing assembly of an embodiment of the present invention in a direction different from FIG. 4.

[0061] FIG. 7 is a bottom perspective view of a bushing assembly of an embodiment of the present invention.

[0062] FIG. 8 is a bottom side exploded perspective view of a bush assembly of an embodiment of the present invention.

[0063] FIG. 9 is a plan view of a bushing assembly of an embodiment of the present invention.

[0064] FIG. 10 is a cross-sectional view of line AA of FIG. 9.

[0065] FIG. 11 is a bottom view of a bushing assembly of an embodiment of the present invention.

[0066] FIG. 12 is an exploded perspective view illustrating an example of another form of the present invention.

[0067] FIG. 13 is a bottom perspective view illustrating an example of another form of the present invention.

[0068] FIG. 14 is a bottom-side exploded perspective view illustrating an example of another form of the present invention.

[0069] FIG. 15 is a rear view illustrating an example of another form of the present invention.

[0070] FIG. 16 is a bottom view illustrating another example of another form of the present invention.

[0071] FIG. 17 is a bottom perspective view illustrating another example of another form of the present invention.

[0072] FIG. 18 is a bottom-side exploded perspective view for illustrating another example of another form of the present invention.

[0073] FIG. 19 is a side view illustrating another example of another form of the present invention.

[0074] FIG. 20 is a perspective view illustrating another example of another form of the present invention.

[0075] FIG. 21 is a side view illustrating another example of a different form of the present invention.

[0076] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted.

[0077] In describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are intended only to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by the terms. Where it is stated that a component is "connected," "combined," or "connected" to another component, it should be understood that the component may be directly connected or connected to the other component, but that another component may also be "connected," "combined," or "connected" between each component.

[0078] The bush assembly of the present invention and the compressor having the same improve the coupling structure between the slide bush (400) and the balance weight (500) so that they can be easily coupled while also being accurately coupled in the correct position. To this end, the bush assembly (400) and the compressor having the same of the present invention are provided with a coupling flange (412) for coupling with the balance weight (420) on the slide bush (410).

[0079] A preferred embodiment of a compressor having a slide bushing assembly of the present invention will be described in more detail for each component with reference to the attached FIGS. 1 to 21 as follows.

[0080] The compressor of the embodiment of the present invention has a case (100) defined by its exterior.

[0081] As illustrated in FIG. 1, the case (100) may be formed to have a sealed internal space. Inside the case (100), a compression unit (200) and a transmission unit (300) are respectively provided.

[0082] The above-mentioned electric motor (300) may be defined as a part or device that provides driving force to the above-mentioned compression unit (200) to compress the refrigerant. The above-mentioned electric motor (300) may be provided in any one of the internal spaces of the case (100). For example, as illustrated, the above-mentioned electric motor (300) may be provided in the lower space of the internal space of the case (100).

[0083] The above-mentioned electric motor (300) includes a rotor (310) and a stator (320). The rotor (310) rotates a rotation axis (330) that is located inside the stator (320) and passes through its center.

[0084] The above-mentioned rotating shaft (330) can be defined as a conventional crank shaft, and the upper end of the above-mentioned rotating shaft (330) is connected to the above-mentioned compression part (200).

[0085] The above compression unit (200) may be defined as a part or assembly that compresses the refrigerant. The compression unit (200) may be provided in any one of the internal spaces of the case (100). For example, as illustrated, the compression unit (200) may be provided in the upper space within the case (100).

[0086] The above compression unit (200) includes a first scroll (210) and a second scroll (220) arranged to face each other vertically. For example, the first scroll (210) is located on the upper side and the second scroll (220) is located on the lower side.

[0087] Each of the above-mentioned scrolls (210, 220) is provided with a respective wrap (211, 221) on the opposing surface between them. For example, a first wrap (211) is provided on the bottom surface of the first scroll (210), and a second wrap (221) is provided on the top surface of the second scroll (220). The first wrap (211) and the second wrap (221) interlock with each other to form at least one compression chamber. Each of the above-mentioned wraps (211, 221) may be formed in a spiral shape.

[0088] The compression space of the above compression chamber can be varied by the rotational movement of the second wrap (221). For example, the compression space of the compression chamber is gradually reduced by the rotational movement of the second wrap (221), thereby compressing the refrigerant inside the compression chamber.

[0089] At least one of the first scroll (210) and the second scroll (220) can be rotated relative to the other scroll.

[0090] For example, the first scroll (210) may not rotate, and only the second scroll (220) may rotate.

[0091] The first scroll (210) may be fixedly installed within a case. The fixation may be defined as a state in which rotation or pivoting in the circumferential direction is prevented. For example, the first scroll (210) may be installed to move in an up-and-down direction opposite to the second scroll (220), or the first scroll (210) may be installed to move radially from the axis center.

[0092] The second scroll (220) can be installed to pivot relative to the first scroll (210).

[0093] The axis center of the rotation shaft (330) is installed to be concentric with the center of the first scroll (210), and the center of the second scroll (220) is coupled to be eccentric from the axis center of the rotation shaft (330). To this end, as shown in FIG. 2, an eccentric pin (331) is formed at the top of the rotation shaft (330) and is eccentric from the axis center of the rotation shaft (330), and a boss (222) is formed at the bottom of the second scroll (220) to receive the eccentric pin (331).

[0094] Next, the compressor of the embodiment of the present invention includes a bush assembly (400).

[0095] The bush assembly (400) can be defined as a device, part, or structure that transmits power to allow the second scroll (220) to pivot by receiving rotational force from the rotation shaft (330). That is, as shown in FIG. 2, the bush assembly (400) transmits power while being provided to the connection part between the rotation shaft (330) and the second scroll (220).

[0096] FIGS. 3 to 11 illustrate a bush assembly (400) of an embodiment of the present invention.

[0097] As illustrated in these drawings, the bush assembly (400) of the embodiment of the present invention may be composed of a slide bush (410) and a balance weight (420).

[0098] The above slide bush (410) rotates together with the eccentric pin (331) of the rotating shaft (330) during normal operation of the scroll compressor, causing the wraps (211, 221) of the two scrolls (210, 220) to be in close contact with each other, and acts to cause the wraps (211, 221) of the two scrolls (210, 220) to be separated from each other when the scroll compressor stops.

[0099] The above slide bush (410) may be formed as a bush having an inner surface through which the eccentric pin (331) of the rotation shaft (330) passes or is inserted.

[0100] In addition, a flat portion (411) formed as a flat surface may be formed on the inner surface of the slide bush (410).

[0101] The above-mentioned flat portion (411) can act as a contact surface that contacts the eccentric pin (331) of the rotation shaft (330) to transmit power. In addition, the flat portion (411) acts to cause the second scroll (220) to slide in the radial direction of the rotation shaft (330) when abnormal compression occurs. This prevents damage by separating the wraps (211, 221) of each scroll (210, 220) from each other when abnormal compression occurs in the compressor.

[0102] The balance weight (420) is a component for counteracting the centrifugal force of the second scroll (220). That is, the balance weight (420) is configured to provide centrifugal force in a direction opposite to the direction in which the centrifugal force of the second scroll (220) is applied, thereby allowing the centrifugal force provided to the slide bush (410) to be relieved.

[0103] The balance weight (420) includes a protrusion (421) for providing centrifugal force. The protrusion (421) may be formed to provide centrifugal force in a direction opposite to the direction of action of the centrifugal force acting on the second scroll (220) during the pivoting motion of the second scroll (220). That is, the protrusion (421) may be formed to protrude from the axis center of the slide bush (410) in a direction opposite to the direction of the centrifugal force of the second scroll (220).

[0104] The above protrusion (421) can be formed in an arc shape when viewed from a planar view. That is, the above protrusion (421) is formed to gradually expand toward the outside, thereby providing centrifugal force in the direction of expansion.

[0105] The balance weight (420) may further include a gripping projection (422) that is spaced apart from a portion of the circumferential surface of the slide bush (410) and provides a gap for coupling with the boss (222) formed on the second scroll (220) between the circumferential surface and the balance weight (420). The gripping projection (422) may provide a gap for coupling with the boss (222) of the second scroll (220) between the slide bush (410) and the balance weight (420).

[0106] The gripping protrusion (422) may be formed as a ring-shaped structure that surrounds the boss (222), and may be formed as an arc shape when viewed from a planar view. The gripping protrusion (422) may be formed such that the thickness of the central portion and the thickness of both ends are different. For example, the gripping protrusion (422) may be formed such that the thickness gradually decreases towards both ends.

[0107] In addition, the gripping protrusion (422) may be formed to be equal to the height of the slide bush (410) or lower than the slide bush (410). For example, the height of the upper surface of the gripping protrusion (422) and the upper surface of the slide bush (410) may be formed to be the same.

[0108] The above gripping projection (422) may be formed to protrude upward from the inner circumference of the upper surface of the protrusion (421). Alternatively, the protrusion (421) may be formed to protrude while extending from the outer surface of the gripping projection (422).

[0109] The above gripping protrusion (422) may be formed roundly to have concentric circles with the slide bush (410). That is, the inner surface (or outer surface) of the gripping protrusion (422) and the inner surface of the slide bush (410) may be formed concentrically.

[0110] The above bush assembly (400) may further include a coupling structure for combining the slide bush (410) and the balance weight (420). That is, the slide bush (410) and the balance weight (420) can be combined with each other by the coupling structure to form an integrated unit.

[0111] The above coupling structure includes a coupling flange (412) formed on the slide bush (410). That is, the slide bush (410) can be coupled to the balance weight (420) by providing the coupling flange (412).

[0112] The above coupling flange (412) is fastened with a bolt (430) while in contact with a part of the balance weight (420). That is, the slide bushing (410) is not pressed into the balance weight (420) to become an integral part of it, but rather is fastened with a bolt using the coupling flange (412).

[0113] The coupling flange (412) of the slide bush (410) can be formed to match a part of the balance weight (420). For example, since the coupling flange (412) is formed to match a part of the bottom surface of the balance weight (420) while in surface contact, the connection with the balance weight (420) can be made stable. The match may be defined not as a perfect dimensional match, but as a match between shapes having an error range that can be verified by an operator.

[0114] Preferably, the coupling flange (412) of the slide bush (410) can be coupled to a portion of the bottom surface of the protrusion (421) forming the balance weight (420). To this end, the coupling flange (412) can be formed in an arc shape such that at least a portion of it aligns with the protrusion (421) when viewed from a planar view.

[0115] In this way, since the above-mentioned connecting flange (412) is joined by aligning with a part of the bottom surface of the protrusion (421), the bolt fastening work for joining them can be easily performed.

[0116] The above bolt (430) may be provided in multiple numbers, at least two or more. That is, the bolt fastening portion of the coupling flange (412) may be provided in multiple positions. This structure is designed to prevent the coupling flange (412) from rotating in the fastening direction or the relative position of the slide bushing (410) and the balance weight (420) from becoming misaligned when the bolt (430) is fastened.

[0117] Meanwhile, the coupling flange (412) is formed with the same shape as a portion of the bottom surface of the balance weight (420) and is coupled to that portion. For example, the coupling flange (412) is formed with an arc structure identical to the inner circumference portion of the protrusion (421) while concentric with the protrusion (421), so that the direction of the centrifugal force acting on the protrusion (421) and the direction of the centrifugal force acting on the coupling flange (412) can be aligned.

[0118] Additionally, the coupling flange (412) may be formed around the lower circumference of the slide bush (410). This allows for maximizing the contact surface with the boss (222) of the second scroll (220) inserted between the outer surface of the slide bush (410) and the inner surface of the gripping protrusion (422).

[0119] In the following, the assembly process of a bush assembly (400) according to an embodiment of the present invention is described.

[0120] First, the bush assembly (400) of the embodiment of the present invention is made by combining a slide bush (410) and a balance weight (420).

[0121] To this end, a slide bush (410) and a balance weight (420) are prepared, and then the connecting flange (412) of the slide bush (410) is brought into close contact with the bottom surface of the protrusion (421) of the balance weight (420). At this time, the connecting flange (412) and the protrusion (421) each have their respective fastening holes (412a, 421a) aligned with each other.

[0122] Afterwards, the connection between the slide bush (410) and the balance weight (420) is completed by fastening the bolt (430) to each fastening hole (412a, 421a).

[0123] And, the bush assembly (400) is installed on the eccentric pin (331) of the rotation shaft (330). That is, the eccentric pin (331) is inserted into the slide bush (410) of the bush assembly (400).

[0124] Additionally, the bush assembly (400) coupled to the rotation axis (330) is inserted into a boss (222) formed on the bottom surface of the second scroll (220). That is, the bush assembly (400) is installed on the second scroll (220) by inserting the boss (222) between the gripping protrusion (422) of the bush assembly (400) and the outer surface of the slide bush (410).

[0125] The bush assembly (400) provided in this way rotates eccentrically from the axis center of the rotation shaft (330) during the rotational movement of the rotation shaft (330) driven by the drive of the electric motor (300), thereby causing the second scroll (220) to pivot from the center of the first scroll (210).

[0126] In particular, the slide bush (410) of the bush assembly (400) acts to cause the second scroll (220) to slide in the radial direction of the rotation axis (330) when abnormal compression occurs by providing a flat portion (411). As a result, when abnormal compression occurs in the compressor, the wraps (211, 221) of each scroll (210, 220) are separated from each other, thereby preventing damage.

[0127] In addition, the balance weight (420) of the bush assembly (400) provides centrifugal force in a direction opposite to the direction in which the centrifugal force of the second scroll (220) is applied when the slide bush (410) rotates. This allows the centrifugal force provided to the slide bush (410) to be eliminated.

[0128] The slide bush (410) of the above-described bush assembly (400) is at risk of being damaged by prolonged operation. However, in the bush assembly (400) of the present invention embodiment, the slide bush (410) and the balance weight (420) are joined to each other by a bolt (430). Accordingly, if damage occurs to the slide bush (410), the bolt connection from the balance weight (420) is released to separate them, and then a new slide bush (410) can be attached and used.

[0129] As described above, in a compressor having a bush assembly (400) of the present invention, the slide bush (410) and the balance weight (420) are fastened together by a bolt (430), so deformation caused during the process of integrating the slide bush (410) with the balance weight (420) can be prevented.

[0130] In addition, since the compressor having the bush assembly (400) of the present invention is provided with a plurality of fastening portions of the bolt (430), the slide bush (410) can be accurately coupled to the balance weight (420) without rotating or shifting from its original position.

[0131] In addition, the compressor having the bush assembly (400) of the present invention can accurately connect the slide bush (410) to the balance weight (420) without tilting because the connecting flange (412) of the slide bush (410) is pressed against the balance weight (420) and the contact portion is fastened. In particular, tilting of the slide bush (410) can be prevented by pressing the connecting flange (412) against the bottom surface of the protrusion (421) forming the balance weight (420).

[0132] In addition, the compressor having the bush assembly (400) of the present invention can perform the operation accurately and simply because the slide bush (410) and the balance weight (420) are fastened with a bolt (430). Along with this, manufacturing quality control of the bush assembly (400) is easy, and material costs can be reduced and the manufacturing period shortened.

[0133] Meanwhile, the bush assembly (400) forming the compressor of the present invention can be implemented in a form different from the previously described embodiment. That is, additional modifications are possible to provide better performance or effects.

[0134] As an example of another form of the compressor of the present invention, as shown in FIGS. 12 to 16, a drainage channel (440) may be further formed in the bush assembly (400) of the compressor of the present invention. That is, by additionally forming the drainage channel (440), oil pumped along the rotating shaft (330) can be discharged into the operating space within the compressor through the connection portion with the slide boss (410).

[0135] To this end, a drainage channel (440) through which oil is discharged can be formed in the coupling flange (412) of the slide bush (410) forming the bush assembly (400).

[0136] The above drainage channel (440) may be formed on the bottom surface of the coupling flange (412). At this time, one end of the above drainage channel (440) may be formed to be in communication with the inner surface of the slide bush (410). Thus, oil present on the inner surface of the slide bush (410) that moves upward along the interior or surface of the rotating shaft (330) can flow along the above drainage channel (440) and be discharged into the operating space inside the compressor.

[0137] The above drainage channel (440) may be formed to discharge oil in a radial direction from the center of the slide bush (410). That is, the above drainage channel (440) is formed in a radial direction from the center of the slide bush (410).

[0138] Preferably, the drainage channel (440) is formed to face the direction in which the centrifugal force of the balance weight (420) acts. Due to this structure, oil that has moved upward along the rotating shaft (330) can be smoothly discharged into the space inside the compressor through the drainage channel (440).

[0139] As another example of another form of the compressor of the present invention, the bush assembly (400) of the compressor of the present invention may further be provided with a structure for accurately recognizing the connection between the slide bush (410) and the balance weight (420).

[0140] That is, considering that the connecting flange (412) of the slide bush (410) and the protrusion (421) of the balance weight (420) are connected by surface contact with each other, it may be difficult for the operator to perceive the accuracy of the connection. Taking this into consideration, the bush assembly (400) of the compressor of the present invention additionally provides a structure for recognizing the connection between the slide bush (410) and the balance weight (420) so that the operator can perceive the accuracy of the connection.

[0141] To this end, in the bush assembly (400) of the compressor of the present invention, as shown in FIGS. 17 to 19, a seating ledge (423) is formed on the bottom surface of the balance weight (420), and the coupling flange (412) of the slide bush (410) can be coupled by aligning with the bottom surface of the seating ledge (423).

[0142] The above-mentioned seating ledge (423) is formed as a stepped ledge that protrudes from the bottom surface of the above-mentioned protrusion (421). The protrusion height of the above-mentioned seating ledge (423) can be formed to protrude from the above-mentioned protrusion (421) and be thinner than the upper and lower thickness of the above-mentioned protrusion (421). That is, the seating ledge (423) protrudes from the above-mentioned protrusion (421) so that it can be perceived by the operator, and the seating ledge (423) is made to have a lower height than the above-mentioned protrusion (421) so that the effect on the centrifugal force provided by the above-mentioned protrusion (421) can be minimized.

[0143] Additionally, the seating ledge (423) may be formed to form an arc shape along the inner circumference of the protrusion (421). That is, the inner surface of the seating ledge (423) and the inner surface of the protrusion (421) (or the inner surface of the gripping protrusion) are formed to coincide with each other.

[0144] The length of the above-mentioned seating ledge (423) (distance from the inner surface to the outer surface) is formed to be smaller than the length of the above-mentioned protrusion (421) (distance from the inner surface to the outer surface). This allows the influence of the above-mentioned seating ledge (423) on the centrifugal force of the above-mentioned protrusion (421) to be minimized.

[0145] Preferably, the perimeter surface of the coupling flange (412) and the perimeter surface of the seating ledge (423) can be formed to coincide. With this structure, the operator can determine whether the coupling is accurately formed by confirming that the perimeter surface of the coupling flange (412) and the perimeter surface of the seating ledge (423) coincide.

[0146] As another example of another form of the compressor of the present invention, as shown in FIGS. 20 and 21, the bush assembly (400) of the compressor of the present invention may further have inclined surfaces (421a, 422a) formed therein to guide oil to be scattered to the bottom surface of the second scroll (220) when the bush assembly (400) rotates.

[0147] That is, when the bush assembly (400) rotates, the oil pumped into the boss (222) of the second scroll (220) along the inside of the rotation axis (330) can be scattered toward the bottom surface of the second scroll (220) by riding along the inclined surface (421a, 422a) formed at the end corners of the protrusion (421) and gripping protrusion (422) of the balancer weight (420). This allows the lubrication performance of the second scroll (220) to be improved.

[0148] Although not shown, the upper inner corner of the gripping protrusion (422) can also be formed at an angle to guide the scattering of the oil.

[0149] As another example of another form of the compressor of the present invention, the coupling flange (412) formed on the slide bush (410) may be formed to be approximately the same size as the protrusion (421) of the balance weight (420). That is, as shown in FIGS. 20 and 21, the entire coupling flange (412) may be formed to cover the entire bottom surface of the protrusion (421). Of course, although not shown in detail, the coupling flange (412) and the protrusion (421) may be formed to match each other or may be formed with some difference in size.

[0150] As another example of a different form of the compressor of the present invention, although not illustrated, the slide bush (400) may be formed such that the outer surface and the inner surface do not form concentric circles with respect to each other. For example, the outer surface of the slide bush (400) may be formed eccentrically with respect to the center of the inner surface. In this case, the eccentric pin (331) is not required. That is, the slide bush (400) can perform the role of the eccentric pin (331) instead.

[0151] On the other hand, the bush assembly of the present invention may also be used in other devices or equipment other than compressors.

[0152] For example, the bush assembly of the present invention can be applied to various types of bushes for power transmission.

[0153] That is, a bush assembly (400) may be provided alone, comprising a slide bush (410) coupled to an eccentric portion and a balance weight (420) coupled to the slide bush (410) to provide centrifugal force, and further provided with a coupling flange (412) coupled to the slide bush (410) while matching a part of the balance weight.

[0154] Here, the balance weight (420) includes a gripping protrusion (422) that is spaced apart from a portion of the circumferential surface of the slide bush (410) and forms a concentric circle with said circumferential surface, and an arc-shaped protrusion (421) that extends from the outer circumferential surface of said gripping protrusion (422) to provide centrifugal force, and the coupling flange (412) of said slide bush (410) is coupled with a bolt (430) while aligning with a portion of the bottom surface of said protrusion (421).

[0155] Thus, the bush assembly of the present invention or the compressor having the bush assembly can be applied to various parts or modified into various forms.

[0156] In the foregoing, although all components constituting an embodiment according to the present invention have been described as being combined or operating in combination, the present invention is not necessarily limited to such embodiments. That is, within the scope of the purpose of the present invention, all such components may be selectively combined in one or more ways to operate. Furthermore, terms such as "include," "constitute," or "have" described above, unless specifically stated otherwise, mean that the relevant component may be inherent; thus, they should be interpreted as allowing for the inclusion of additional components rather than excluding other components. All terms, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains, unless otherwise defined. Terms commonly used, such as those defined in advance, should be interpreted in accordance with their meaning in the context of the relevant technology and, unless explicitly defined in the present invention, should not be interpreted in an ideal or overly formal sense.

[0157] The foregoing description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations within the scope of the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by these embodiments. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention.

Claims

1. A first scroll having a first wrap; A second scroll having a second lap that engages with the first lap; A rotating shaft having an eccentric pin to pivot the second scroll relative to the first scroll; A bushing assembly comprising a slide bushing inserted into the eccentric pin while being provided at the coupling portion between the eccentric pin and the second scroll, and a balance weight coupled to the slide bushing to provide centrifugal force; A compressor in which the slide bush of the above bush assembly is further provided with a coupling flange that is coupled to a part of the balance weight.

2. In Paragraph 1, A compressor in which the coupling flange of the above slide bushing is coupled to a portion of the bottom surface of the above balance weight.

3. In Paragraph 1, The above balance weight is, A gripping projection that provides a gap so that the second scroll is placed between the circumferential surface and the above-mentioned slide bushing while being spaced apart from a part of the circumferential surface of the above-mentioned slide bushing, and A compressor comprising an arc-shaped protrusion that extends from the outer circumferential surface of the above-mentioned gripping protrusion to provide centrifugal force.

4. In Paragraph 3, A compressor in which the coupling flange of the above slide bushing is coupled to a portion of the bottom surface of the above protrusion.

5. In Paragraph 4, On the bottom surface of the above-mentioned protrusion, a seating ledge is formed that protrudes downward from the above-mentioned protrusion and is formed as a stepped edge, and The coupling flange of the above slide bushing is a compressor coupled to the above seating jaw.

6. In Paragraph 5, A compressor in which the above-mentioned coupling flange and mounting jaw are fastened with bolts.

7. In Paragraph 6, The above bolt is provided in a compressor with at least two or more multiple bolts.

8. In Paragraph 5, The above-mentioned seating ledge is a compressor formed along the inner circumference of the above-mentioned protrusion.

9. In Paragraph 3, A compressor in which the above-mentioned protrusion and the above-mentioned coupling flange are formed to form concentric circles.

10. In Paragraph 1, A compressor in which the above-mentioned coupling flange is formed to form an arc shape while protruding radially from the lower circumferential surface of the above-mentioned slide bush.

11. In Paragraph 1, A compressor having a drainage passage formed on the bottom surface of the above-mentioned coupling flange that communicates with the inner surface of the above-mentioned slide bushing.

12. In Paragraph 11, A compressor in which the above-mentioned drainage path is formed to be directed radially from the center of the above-mentioned slide bush.

13. A slide bushing installed at the eccentric portion of the rotating shaft; It includes a balance weight coupled to the slide bushing above to provide centrifugal force; and A bushing assembly in which a connecting flange is further provided on the slide bushing to be connected to a part of the balance weight.

14. In Paragraph 13, The balance weight includes a gripping projection spaced apart from a portion of the circumferential surface of the slide bushing, and an arc-shaped protrusion extending from the outer circumferential surface of the gripping projection to provide centrifugal force. The coupling flange of the above slide bushing is a bushing assembly that is bolted to a portion of the bottom surface of the above protrusion.

15. In Paragraph 14, On the bottom surface of the above-mentioned protrusion, a seating ledge is formed that protrudes downward from the above-mentioned protrusion and is formed as a stepped edge, and The coupling flange of the above slide bushing is a bushing assembly coupled to the above seating ledge.

16. In Paragraph 15, The above-mentioned seating ledge is a bushing assembly formed along the inner circumference of the above-mentioned protrusion.

17. In Paragraph 14, A bushing assembly having an inclined surface formed in the above coupling flange to guide the scattering of oil between the slide bushing and the above coupling flange.

18. In Paragraph 17, The above inclined surface is a bushing assembly formed at the end corners of the gripping protrusion and the projection of the above coupling flange, respectively.

19. In Paragraph 13, A bushing assembly having a drainage channel formed on the bottom surface of the above-mentioned coupling flange that communicates with the inner surface of the above-mentioned slide bushing.

20. In Paragraph 19, The above drainage channel is a bush assembly formed to be radially directed from the center of the slide bush.

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