KR200351633Y1 - Compressor - Google Patents

Compressor Download PDF

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Publication number
KR200351633Y1
KR200351633Y1 KR20-2004-0006452U KR20040006452U KR200351633Y1 KR 200351633 Y1 KR200351633 Y1 KR 200351633Y1 KR 20040006452 U KR20040006452 U KR 20040006452U KR 200351633 Y1 KR200351633 Y1 KR 200351633Y1
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KR
South Korea
Prior art keywords
drive shaft
shaft insertion
compressor
press
insertion hole
Prior art date
Application number
KR20-2004-0006452U
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Korean (ko)
Inventor
정수철
임권수
Original Assignee
한라공조주식회사
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Priority to KR20-2004-0006452U priority Critical patent/KR200351633Y1/en
Application granted granted Critical
Publication of KR200351633Y1 publication Critical patent/KR200351633Y1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B27/1036—Component parts, details, e.g. sealings, lubrication
    • F04B27/1054—Actuating elements
    • F04B27/1063—Actuating-element bearing means or driving-axis bearing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
    • F04B27/0878—Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B27/1036—Component parts, details, e.g. sealings, lubrication
    • F04B27/1045—Cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B27/1036—Component parts, details, e.g. sealings, lubrication
    • F04B27/1081—Casings, housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/12—Kind or type gaseous, i.e. compressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/14—Refrigerants with particular properties, e.g. HFC-134a
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2250/00—Geometry
    • F05B2250/40—Movement of component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

본 고안은 압축기에 관한 것으로서, 압축기 실린더의 구동축삽입공에 니들 롤러 베어링을 압입할 때 실린더 보어의 변형이 발생하지 않도록 하는 것을 목적으로 한다.The present invention relates to a compressor, which aims to prevent deformation of the cylinder bore when pressing the needle roller bearing into the drive shaft insertion hole of the compressor cylinder.

본 고안의 압축기는, 전/후방 하우징(120, 130)과; 상기 전/후방 하우징과 결합되고, 피스톤(140)을 왕복운동가능하게 수용하는 다수의 보어(102)가 각각 형성되며, 중앙부에 구동축(150)이 삽입되는 구동축삽입공(104)이 각각 형성된 한 쌍의 실린더(100, 100)와; 상기 각 구동축삽입공에 개재되어 구동축을 회전가능하게 지지하는 베어링부재(110);를 포함하여 이루어진다. 상기 각 구동축삽입공(104)의 내주면에, 다수의 압입비드(106)가 돌출형성된다. 상기 압입비드(106)는, 삼각형 단면형상을 가지며 구동축삽입공(104)의 내주면에 원주방향 또는 길이방향으로 형성될 수 있다.Compressor of the present invention, the front / rear housing (120, 130); As long as the plurality of bores 102 coupled with the front / rear housings and reciprocally receiving the piston 140 are formed, respectively, the drive shaft inserting holes 104 into which the drive shaft 150 is inserted are respectively formed. A pair of cylinders 100 and 100; And a bearing member 110 interposed in each of the driving shaft insertion holes to rotatably support the driving shaft. On the inner circumferential surface of each of the drive shaft insertion holes 104, a plurality of press-fit beads 106 are formed to protrude. The press-fit bead 106 has a triangular cross-sectional shape and may be formed in the circumferential direction or the longitudinal direction on the inner circumferential surface of the drive shaft insertion hole 104.

Description

압축기{COMPRESSOR}Compressor {COMPRESSOR}

본 고안은 압축기에 관한 것으로서, 특히 압축기 실린더의 구동축삽입공에 니들 롤러 베어링(Needle Roller Bearing)을 압입할 때 실린더 보어(Cylinder Bore)의 변형이 발생하지 않는 압축기에 관한 것이다.The present invention relates to a compressor, and more particularly, to a compressor in which deformation of a cylinder bore does not occur when a needle roller bearing is pressed into a drive shaft insertion hole of a compressor cylinder.

자동차용 냉방장치를 구성하는 사판식 압축기는 풀리를 통하여 전달되는 엔진의 동력을 전자클러치의 단속작용에 의하여 선택적으로 전달받아 증발기로부터 공급되는 냉매를 압축하여 응축기로 보내는 장치이다.The swash plate compressor constituting the cooling device for automobiles is a device that selectively receives power of an engine delivered through a pulley by an intermittent action of an electronic clutch, compresses a refrigerant supplied from an evaporator, and sends the refrigerant to a condenser.

이러한 압축기는 여러 가지 종류가 있으며, 그 중 통상적으로 사용되고 있는 사판식 압축기는, 도 1에 도시된 바와 같이, 전방실린더(30)가 내장되고 냉매흡입실(12) 및 냉매배출실(14)이 형성된 전방하우징(10)과, 상기 전방하우징(10)과 결합되고 후방실린더(40)가 내장되며 냉매흡입실(22) 및 냉매배출실(24)이 형성된 후방하우징(20)을 구비한다. 상기 전/후방실린더(30, 40)에는 다수의 보어(32, 42)가 서로 대응하여 형성되어 있고, 상기 대응하는 보어(32, 42)들에 걸쳐 양두 피스톤(50)들이 직선왕복운동하도록 결합된다. 이 양두 피스톤(50)들은 전/후방실린더(30, 40)에 의하여 형성되는 크랭크실(60)에서 구동축(70) 둘레로 결합되는 사판(80)의 외주를 따라 한 쌍의 슈(52, 52)를 각각 개재하여 결합된다. 전방하우징(10)과 전방실린더(30)와의 사이에는 전방밸브유니트(34)가 개재되고,후방하우징(20)과 후방실린더(40)와의 사이에는 후방밸브유니트(44)가 개재된다. 따라서, 구동축(70)의 회전에 따라 회전하는 사판(80)에 의하여 양두 피스톤(50)들은 전/후방실린더(30, 40)의 보어(32, 42)들 내부를 왕복하게 되고, 양두 피스톤(50)들의 왕복운동에 의하여 증발기로부터 전/후방하우징(10, 20)의 냉매흡입실(12, 22) 및 밸브유니트(34, 44)를 거쳐 전/후방실린더(30, 40)의 보어(32, 42)들에 공급되는 냉매가 압축되어, 밸브유니트(34, 44) 및 전/후방하우징(10, 20)의 냉매배출실(14, 24)을 거쳐 응축기 쪽으로 배출된다.There are many kinds of such compressors, and the swash plate type compressor, which is commonly used, has a built-in front cylinder 30 and a refrigerant suction chamber 12 and a refrigerant discharge chamber 14 as shown in FIG. The front housing 10 is formed, and the rear housing 20 is coupled to the front housing 10 and has a rear cylinder 40 embedded therein and includes a refrigerant suction chamber 22 and a refrigerant discharge chamber 24. The front / rear cylinders 30 and 40 have a plurality of bores 32 and 42 formed to correspond to each other, and both piston pistons 50 are coupled to reciprocate linearly over the corresponding bores 32 and 42. do. These two head pistons (50) are a pair of shoes (52, 52) along the outer periphery of the swash plate (80) coupled around the drive shaft (70) in the crank chamber (60) formed by the front and rear cylinders (30, 40) ) Are coupled through each. A front valve unit 34 is interposed between the front housing 10 and the front cylinder 30, and a rear valve unit 44 is interposed between the rear housing 20 and the rear cylinder 40. Therefore, the two head pistons 50 reciprocate inside the bores 32 and 42 of the front and rear cylinders 30 and 40 by the swash plate 80 that rotates in accordance with the rotation of the drive shaft 70. Bore 32 of the front and rear cylinders 30 and 40 from the evaporator through the refrigerant suction chambers 12 and 22 and the valve units 34 and 44 of the front and rear housings 10 and 20 by the reciprocating motion of the 50. 42 are compressed and discharged toward the condenser via the valve units 34 and 44 and the refrigerant discharge chambers 14 and 24 of the front and rear housings 10 and 20.

상기한 바와 같은 사판식 압축기에 있어서, 구동축(70)은 전/후방실린더(30, 40)의 중앙부에 형성된 구동축삽입공(36, 46)에 각각 니들 롤러 베어링(72)을 개재하여 회전가능하게 지지된다. 전/후방실린더(30, 40)의 구동축삽입공(36, 46)중 전/후방하우징(10, 20)을 향한 부분은 확관부로 형성되어 있고, 니들 롤러 베어링(72)은 구동축삽입공(36, 46)의 확관부를 통하여 확관부 끝까지 압입된다. 또한, 니들 롤러 베어링(72)의 유동은 구동축삽입공(36, 46)중 확관부 끝단부에 압입되는 스토퍼링(Stopper Ring, 74)에 의하여 방지될 수 있다.In the swash plate type compressor as described above, the drive shaft 70 is rotatable through the needle roller bearing 72 in the drive shaft insertion holes 36 and 46 formed in the center of the front and rear cylinders 30 and 40, respectively. Supported. Portions of the front / rear cylinders 30 and 40 toward the front / rear housings 10 and 20 of the drive shaft insertion holes 36 and 46 are formed with expansion pipes, and the needle roller bearing 72 is the drive shaft insertion hole ( 36, 46) to the end of the expansion pipe through the expansion pipe. In addition, the flow of the needle roller bearing 72 can be prevented by a stopper ring 74 which is pressed into the end portion of the expansion pipe of the drive shaft insertion holes 36 and 46.

상기 니들 롤러 베어링(72)이 구동축삽입공(36, 46)에 압입되는 관계로 니들 롤러 베어링(72)의 외경은 구동축삽입공(36, 46)의 내경보다 20∼60㎛ 정도의 압입공차만큼 크다. 따라서, 니들 롤러 베어링(72)을 구동축삽입공(36, 46)에 압입할 때 도 2에 도시된 바와 같이, 전/후방실린더(30, 40)의 보어(32, 42)가 점선으로 표시된 것처럼 변형되며, 이 때문에 양두 피스톤(50)의 직선왕복운동이 원활하게 이루어지지 않을 뿐만 아니라, 실린더 보어(32, 42)의 내주면 및 양두 피스톤(50)의 내주면이 쉽게 마모된다.Since the needle roller bearing 72 is press-fitted into the drive shaft insertion holes 36 and 46, the outer diameter of the needle roller bearing 72 is about 20 to 60 μm larger than the inner diameter of the drive shaft insertion holes 36 and 46. Big. Thus, when the needle roller bearing 72 is press-fitted into the drive shaft insertion holes 36 and 46, as shown in FIG. 2, the bores 32 and 42 of the front / rear cylinders 30 and 40 are indicated by dotted lines. It is deformed, and therefore, the linear reciprocating motion of the double head piston 50 is not smoothly performed, and the inner circumferential surfaces of the cylinder bores 32 and 42 and the inner circumferential surface of the double head piston 50 are easily worn.

이러한 문제점을 해결하고자, 일본 공개특허 제2003-202016호에 개시된 기술이 제안되었다. 이 선행기술은 니들 롤러 베어링의 외륜의 두께를 소정의 치수로 설정함으로써 상기한 문제점을 해결하고자 한 것이다.To solve this problem, a technique disclosed in Japanese Patent Laid-Open No. 2003-202016 has been proposed. This prior art aims to solve the above problems by setting the thickness of the outer ring of the needle roller bearing to a predetermined dimension.

그러나, 외륜의 두께를 소정의 치수로 설정한다 할 지라도 실린더 및 니들 롤러 베어링의 제조상의 공차, 조립상의 공차 등 여러 가지 이유로 인하여 상기한 문제점을 해소하는 데에는 한계가 있다.However, even if the thickness of the outer ring is set to a predetermined dimension, there are limitations in solving the above problems due to various reasons such as manufacturing tolerances of cylinders and needle roller bearings and assembly tolerances.

본 고안은 상기한 종래 문제점을 고려하여 이루어진 것으로서, 압축기 실린더의 구동축삽입공에 니들 롤러 베어링을 압입할 때 실린더 보어의 변형이 발생하지 않는 압축기 실린더의 베어링 장착구조의 제공을 목적으로 한다.The present invention has been made in consideration of the above-described conventional problems, and an object of the present invention is to provide a bearing mounting structure of a compressor cylinder in which deformation of a cylinder bore does not occur when pressing a needle roller bearing into a drive shaft insertion hole of a compressor cylinder.

도 1은 일반적인 사판식 압축기를 개략적으로 나타내는 단면도이다.1 is a cross-sectional view schematically showing a general swash plate compressor.

도 2는 압축기 실린더에 니들 롤러 베어링을 압입할 때 실린더 보어가 변형되는 상태를 나타내는 정면도이다.2 is a front view showing a state in which the cylinder bore is deformed when the needle roller bearing is pressed into the compressor cylinder.

도 3은 본 고안에 따른 압축기를 개략적으로 나타내는 단면도이다.3 is a cross-sectional view schematically showing a compressor according to the present invention.

도 4는 베어링 부재를 실린더에 장착하는 상태를 나타내는 분해 사시도이다.It is an exploded perspective view which shows the state which mounts a bearing member to a cylinder.

도 5는 본 고안에 따른 압축기를 구성하는 실린더를 나타내는 부분 단면도이다.5 is a partial cross-sectional view showing a cylinder constituting the compressor according to the present invention.

도 6은 본 고안에 따른 압축기중 베어링 부재가 실린더에 장착된 상태를 나타내는 부분 단면도이다.6 is a partial cross-sectional view showing a state in which a bearing member of the compressor according to the present invention is mounted on a cylinder.

도 7은 본 고안에 따른 압축기의 다른 예에 의하여 베어링 부재가 실린더에 장착된 상태를 나타내는 부분 단면도이다.7 is a partial cross-sectional view showing a state in which a bearing member is mounted to a cylinder by another example of the compressor according to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

100 : 실린더(Cylinder), 102 : 실린더 보어(Cylinder Bore),100: cylinder, 102: cylinder bore,

104 : 구동축삽입공, 106 : 압입비드,104: driving shaft insertion hole, 106: press-fit beads,

110 : 베어링(Bearing)부재, 120 : 전방 하우징(Housing),110: bearing member, 120: front housing (Housing),

130 : 후방 하우징, 140 : 피스톤,130: rear housing, 140: piston,

150 : 구동축.150: drive shaft.

상기 목적을 달성하기 위하여, 본 고안은, 전/후방 하우징과; 상기 전/후방 하우징과 결합되고, 피스톤을 왕복운동가능하게 수용하는 다수의 보어가 각각 형성되며, 중앙부에 구동축이 삽입되는 구동축삽입공이 각각 형성된 한 쌍의 실린더와; 상기 각 구동축삽입공에 개재되어 구동축을 회전가능하게 지지하는 베어링부재;를 포함하여 이루어지는 압축기에 있어서: 상기 베어링부재가 삽입되는 구동축삽입공의 내주면에, 다수의 압입비드가 돌출형성되어 있는 것을 특징으로 한다.In order to achieve the above object, the present invention, the front and rear housings; A pair of cylinders coupled to the front / rear housings, each of which comprises a plurality of bores for reciprocatingly accommodating pistons, each of which includes a drive shaft insertion hole into which a drive shaft is inserted; And a bearing member interposed in each of the drive shaft insertion holes to rotatably support the drive shaft, the compressor comprising: a plurality of press-fit beads protrude from the inner circumferential surface of the drive shaft insertion hole into which the bearing member is inserted. It is done.

상기 압입비드는, 구동축삽입공의 내주면에 원주방향으로 형성될 수 있다.The indentation bead may be formed in the circumferential direction on the inner circumferential surface of the drive shaft insertion hole.

또한, 상기 압입비드는 구동축삽입공의 내주면에 길이방향으로 형성될 수도있다.In addition, the indentation bead may be formed in the longitudinal direction on the inner peripheral surface of the drive shaft insertion hole.

또한, 상기 압입비드는 삼각형 단면형상을 가지는 것이 바람직하다.In addition, the indentation bead preferably has a triangular cross-sectional shape.

상기한 바와 같이 구성된 본 고안의 압축기 실린더의 베어링 장착구조에 따르면, 구동축삽입공에 니들 롤러 베어링을 압입할 때 압입비드들의 첨두부가 압입공차만큼 완충적으로 니들 롤러 베어링이 구동축삽입공에 압입되므로, 압축기 실린더의 보어에는 어떠한 변형도 발생하지 않는다.According to the bearing mounting structure of the compressor cylinder of the present invention configured as described above, when the needle roller bearing is press-fitted into the drive shaft insertion hole, the needle roller bearing is press-fitted into the drive shaft insertion hole by buffering the tip of the press-fit beads by the press-in tolerance. No deformation occurs in the bore of the compressor cylinder.

본 고안의 특징 및 이점들은 첨부도면에 의거한 다음의 상세한 설명으로 더욱 명백해질 것이다. 이에 앞서, 본 명세서 및 청구범위에 사용된 용어나 단어는, 고안자가 그 자신의 고안을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 입각하여 본 고안의 기술적 사상에 부합하는 의미와 개념으로 해석되어야만 한다.The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terminology or words used in this specification and claims are technical idea of the present invention based on the principle that the inventor can properly define the concept of the term in order to best explain his or her design in the best way. It should be interpreted as meanings and concepts corresponding to

도 3에는 본 고안에 따른 압축기의 예가 도시되어 있다. 도 3에 도시된 바와 같이, 본 고안에 따른 압축기는, 전/후방 하우징(120, 130)과, 상기 전/후방 하우징(120, 130)과 결합되고, 피스톤(140)을 왕복운동가능하게 수용하는 다수의 보어(102)가 각각 형성된 한 쌍의 실린더(100, 100)를 포함하여 이루어진다.3 shows an example of a compressor according to the present invention. As shown in FIG. 3, the compressor according to the present invention is coupled to the front and rear housings 120 and 130, and the front and rear housings 120 and 130, and reciprocally receives the piston 140. A plurality of bores 102 are formed, each comprising a pair of cylinders (100, 100) formed.

도 3 및 도 4에 도시된 바와 같이, 상기 실린더(100)에는, 피스톤(140)을 왕복가능하게 수용하도록, 소정의 동심원을 따라 다수(여기서는 5개가 도시됨)의 보어(102)가 형성되며, 실린더(100)의 중앙부에는 구동축(150)이 삽입되는 구동축삽입공(104)이 형성되어 있다.As shown in FIGS. 3 and 4, the cylinder 100 has a plurality of bores 102 formed therein along predetermined concentric circles to reciprocally receive the piston 140. In the center portion of the cylinder 100, a drive shaft insertion hole 104 is formed in which the drive shaft 150 is inserted.

상기 구동축삽입공(104)에는, 구동축(150)을 회전가능하게 지지하도록 베어링부재(110)가 압입된다. 상기 베어링 부재로 니들 롤러 베어링이 채용되는 것이 바람직하다. 구동축삽입공(104)은 소경부 및 대경부를 가지며, 베어링 부재(110)는 구동축삽입공(104)의 대경부 끝까지 압입된다.The bearing member 110 is press-fitted into the drive shaft insertion hole 104 to rotatably support the drive shaft 150. It is preferable that a needle roller bearing is employed as the bearing member. The drive shaft insertion hole 104 has a small diameter part and a large diameter part, and the bearing member 110 is press-fitted to the end of the large diameter part of the drive shaft insertion hole 104.

본 고안에서는 구동축삽입공(104)의 대경부가 니들 롤러 베어링(110)의 외경보다 작은 내경을 가지도록, 구동축삽입공(104)의 대경부 내주면에 다수의 압입비드(106)가 돌출형성된다. 즉, 압입비드(106)의 돌출높이는 니들 롤러 베어링(110)의 압입공차보다 커야 한다.In the present invention, a plurality of press-fit beads 106 protrude from the inner circumferential surface of the large diameter portion of the drive shaft insertion hole 104 such that the large diameter portion of the drive shaft insertion hole 104 has an inner diameter smaller than the outer diameter of the needle roller bearing 110. That is, the protruding height of the indentation bead 106 should be larger than the indentation tolerance of the needle roller bearing 110.

도 4 내지 도 6에 도시된 바와 같이, 상기 압입비드(106)는 구동축삽입공(104)의 대경부 내주면에 원주방향으로 형성될 수 있다.4 to 6, the press-fit beads 106 may be formed in the circumferential direction on the inner circumferential surface of the large diameter portion of the drive shaft insertion hole 104.

또한, 상기 압입비드(106)는, 도 7에 도시된 바와 같이, 구동축삽입공(104)의 대경부 내주면에 길이방향으로 형성될 수 있다. 즉, 압입비드(106)들이 세레이션(Serration) 구조로 형성될 수 있다. 이 경우, 압축기의 크랭크실로부터 오일이 함유된 냉매가 니들 롤러 베어링(110)에 원활하게 공급될 수 있으므로 니들 롤러 베어링(110)의 윤활에 유리하다.In addition, the press-fit bead 106, as shown in Figure 7, may be formed in the longitudinal direction on the inner peripheral surface of the large diameter portion of the drive shaft insertion hole 104. That is, the indentation beads 106 may be formed in a serration structure. In this case, since oil-containing refrigerant can be smoothly supplied to the needle roller bearing 110 from the crank chamber of the compressor, it is advantageous for lubrication of the needle roller bearing 110.

어느 경우든 상기 압입비드(106)는, 도 5에 도시된 바와 같이 삼각형 단면형상을 가지는 것이 바람직하다.In any case, the indentation bead 106 preferably has a triangular cross-sectional shape as shown in FIG. 5.

다음에 상기한 바와 같이 구성된 본 고안에 따른 압축기의 작용에 대하여 설명한다.Next, the operation of the compressor according to the present invention configured as described above will be described.

실린더(100)의 구동축삽입공(104)에 베어링 부재(110)를 압입하면 베어링 부재(110)의 외경이 압입비드(106)들이 이루는 내경보다 크기 때문에, 도 5에 도시된바와 같이, 베어링 부재(110)의 압입공차에 의하여 삼각형 단면 형상을 가진 압입비드(106)들의 끝단부가, 도 6 및 도 7에 도시된 바와 같이, 베어링 부재(110)의 압입공차만큼 변형되어, 베어링 부재(110)가 구동축삽입공(104)에 압입된다. 따라서, 베어링 부재(110)의 압입시, 보어(102)들에는 압입비드(106)들의 완충효과에 의하여 압입에 의한 변형력이 거의 작용하지 않으므로, 압축기 실린더(100)의 보어(102)에 어떠한 변형도 발생하지 않는다.When the bearing member 110 is press-fitted into the drive shaft insertion hole 104 of the cylinder 100, since the outer diameter of the bearing member 110 is larger than the inner diameter of the press-fit beads 106, as shown in FIG. 5, the bearing member Due to the indentation tolerance of 110, the end portions of the indentation beads 106 having a triangular cross-sectional shape are deformed by the indentation tolerance of the bearing member 110, as shown in FIGS. 6 and 7. Is pressed into the drive shaft insertion hole 104. Accordingly, when the bearing member 110 is press-fitted, since the deformation force due to the press-fitting hardly acts on the bores 102 by the buffering effect of the press-fit beads 106, any deformation is applied to the bore 102 of the compressor cylinder 100. Also does not occur.

상기한 바와 같이 구성된 본 고안에 따른 압축기에 의하면, 구동축삽입공(104)에 베어링 부재(110)가 압입될 때, 압입비드(106)들이 베어링 부재(110)의 압입공차만큼 변형되도록 함으로써, 보어(102)의 변형을 방지할 수 있다. 따라서, 보어(102)에 삽입되는 피스톤(140)의 직선왕복운동이 원활하게 이루어질 수 있을 뿐만 아니라, 보어(102)의 내주면 및 피스톤(140) 외주면의 마모를 방지할 수 있다.According to the compressor according to the present invention configured as described above, when the bearing member 110 is press-fitted into the drive shaft insertion hole 104, the press-fit beads 106 are deformed by the press-fitting tolerance of the bearing member 110, bore Deformation of the 102 can be prevented. Therefore, the linear reciprocating motion of the piston 140 inserted into the bore 102 can be made smoothly, and wear of the inner circumferential surface of the bore 102 and the outer circumferential surface of the piston 140 can be prevented.

Claims (4)

전/후방 하우징(120, 130)과; 상기 전/후방 하우징과 결합되고, 피스톤(140)을 왕복운동가능하게 수용하는 다수의 보어(102)가 각각 형성되며, 중앙부에 구동축(150)이 삽입되는 구동축삽입공(104)이 각각 형성된 한 쌍의 실린더(100, 100)와; 상기 각 구동축삽입공에 개재되어 구동축을 회전가능하게 지지하는 베어링부재(110);를 포함하여 이루어지는 압축기에 있어서:Front and rear housings 120 and 130; As long as the plurality of bores 102 coupled with the front / rear housings and reciprocally receiving the piston 140 are formed, respectively, the drive shaft inserting holes 104 into which the drive shaft 150 is inserted are respectively formed. A pair of cylinders 100 and 100; A compressor comprising: a bearing member (110) interposed in each of the drive shaft inserting holes to rotatably support the drive shaft. 상기 각 구동축삽입공(104)의 내주면에, 다수의 압입비드(106)가 돌출형성되어 있는 것을 특징으로 하는 압축기.Compressor, characterized in that a plurality of indentation beads (106) are projected on the inner peripheral surface of each of the drive shaft insertion hole (104). 제 1 항에 있어서,The method of claim 1, 상기 압입비드(106)는, 구동축삽입공(104)의 내주면에 원주방향으로 형성되어 있는 것을 특징으로 하는 압축기.The press-fit bead (106) is formed in the circumferential direction on the inner circumferential surface of the drive shaft insertion hole (104). 제 1 항에 있어서,The method of claim 1, 상기 압입비드(106)는, 구동축삽입공(104)의 내주면에 길이방향으로 형성되어 있는 것을 특징으로 하는 압축기.The press-fit beads (106) are formed in the longitudinal direction on the inner circumferential surface of the drive shaft insertion hole (104). 제 1 항 내지 제 3 항중 어느 한 항에 있어서,The method according to any one of claims 1 to 3, 상기 압입비드(106)는 삼각형 단면형상을 가지는 것을 특징으로 하는 압축기.The press-fit bead (106) is characterized in that it has a triangular cross-sectional shape.
KR20-2004-0006452U 2004-03-10 2004-03-10 Compressor KR200351633Y1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102002124B1 (en) 2018-02-26 2019-07-19 엘지전자 주식회사 Motor operated compressor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102002124B1 (en) 2018-02-26 2019-07-19 엘지전자 주식회사 Motor operated compressor
EP3530946A1 (en) 2018-02-26 2019-08-28 LG Electronics Inc. Motor-operated compressor

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