KR100581395B1 - A ball jointed piston for a compressor of refrigerators - Google Patents

A ball jointed piston for a compressor of refrigerators Download PDF

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KR100581395B1
KR100581395B1 KR1020040107611A KR20040107611A KR100581395B1 KR 100581395 B1 KR100581395 B1 KR 100581395B1 KR 1020040107611 A KR1020040107611 A KR 1020040107611A KR 20040107611 A KR20040107611 A KR 20040107611A KR 100581395 B1 KR100581395 B1 KR 100581395B1
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South Korea
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ball
piston
cup
cup portion
groove
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KR1020040107611A
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Korean (ko)
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이상택
손승길
허수현
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주식회사 대우일렉트로닉스
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    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F04B39/0022—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons piston rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/10—Connection to driving members
    • F16J1/14—Connection to driving members with connecting-rods, i.e. pivotal connections
    • F16J1/22—Connection to driving members with connecting-rods, i.e. pivotal connections with universal joint, e.g. ball-joint
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F25B31/02—Compressor arrangements of motor-compressor units
    • F25B31/023—Compressor arrangements of motor-compressor units with compressor of reciprocating-piston type
    • 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
    • F05B2260/00—Function
    • F05B2260/40—Transmission of power
    • 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
    • F05B2260/00—Function
    • F05B2260/50—Kinematic linkage, i.e. transmission of position
    • 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
    • Y10S417/902—Hermetically sealed motor pump unit

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Compressor (AREA)

Abstract

본 발명은 커넥팅 로드(30)의 볼(31)이 자유로이 회전가능하게 피스톤(40) 내측에 형성된 컵부분(41)의 오목한 요홈(42)에 맞물려 결합되는 냉장고 압축기의 볼조인트 피스톤에 관한 것으로, 컵부분의 요홈(42)에 볼이 배치된 상태에서 코킹공정에 의해 컵부분의 상단부를 볼의 상면으로 만곡하여 조립할 때 컵부분의 상단부 내측에 제공되는 테프론의 링부재(43)는 상측이 하측보다 두께가 감소되게 내측면이 경사면으로 형성되어 코킹공정에 의해 만곡되는 컵부분의 상단부의 볼에 대한 가압력이 일정하게 유지되도록 구성됨으로써, 종래 볼 조인트 피스톤을 갖는 압축기의 초기 운전기간에 볼과 피스톤 컵의 요홈 표면 사이에서의 과도한 국소 마찰에 의한 성능 저하 현상이 방지되어 제품 품질이 개선되는 효과가 있다. The present invention relates to a ball joint piston of a refrigerator compressor in which the ball 31 of the connecting rod 30 is freely rotatably engaged with the concave groove 42 of the cup portion 41 formed inside the piston 40. When the ball is arranged in the groove 42 of the cup part, the upper part of the cup part is assembled by bending the upper part of the cup part to the upper surface of the ball by the caulking process. Since the inner surface is formed to be inclined surface to reduce the thickness more, the pressing force against the ball of the upper end of the cup portion curved by the coking process is maintained to be constant, so that the ball and the piston in the initial operation period of the conventional compressor having a ball joint piston The performance degradation caused by excessive local friction between the groove surface of the cup is prevented, thereby improving the product quality.

냉장고 압축기 볼조인트 피스톤Refrigerator Compressor Ball Joint Piston

Description

냉장고 압축기용 볼조인트 피스톤{A BALL JOINTED PISTON FOR A COMPRESSOR OF REFRIGERATORS}Ball joint piston for refrigerator compressor {A BALL JOINTED PISTON FOR A COMPRESSOR OF REFRIGERATORS}

도 1은 종래 냉장고 압축기의 구조를 보여주는 개략적인 단면도.       1 is a schematic cross-sectional view showing the structure of a conventional refrigerator compressor.

도 2는 도 1의 종래 볼조인트 피스톤을 보여주는 개략적인 분해도.       Figure 2 is a schematic exploded view showing the conventional ball joint piston of Figure 1;

도 3은 본 발명에 의한 압축기의 볼조인트 피스톤의 개략적인 단면도.       Figure 3 is a schematic cross-sectional view of the ball joint piston of the compressor according to the present invention.

도 4는 도 3의 볼조인트 피스톤의 개략적인 분해도.       4 is a schematic exploded view of the ball joint piston of FIG.

도 5는 피스톤의 컵부분에 볼조인트를 삽입한 뒤 코팅가공에 의해 결합한 상태를 보여주는 평면도.       5 is a plan view showing a state in which the ball joint is inserted into the cup portion of the piston and then bonded by coating.

* 도면의 주요 부분에 대한 부호의 설명 *        Explanation of symbols on the main parts of the drawings

30 : 커넥팅 로드 31 : 볼         30: connecting rod 31: ball

40 : 피스톤 41 : 컵부분         40: piston 41: cup part

42 : 요홈 43 : 링부재         42: groove 43: ring member

본 발명은 냉장고 압축기의 볼조인트 피스톤에 관한 것으로, 특히 피스톤에 커넥팅로드의 볼조인트부를 에이징과정 없이도 원활하게 동작하게 결합하도록 개선된 압축기 볼조인트 피스톤에 관한 것이다.The present invention relates to a ball joint piston of a refrigerator compressor, and more particularly to an improved compressor ball joint piston to couple the ball joint portion of the connecting rod to the piston to operate smoothly without an aging process.

일반적으로, 냉장고 압축기는 기체상태 냉매의 액화를 위하여 고압으로 압축하기 위한 것으로 도 1에 단면도로 개략적으로 도시된 바와같이 압축기 케이스(1)내에 냉매 압축을 위한 실린더(2)가 제공되고, 실린더의 피스톤을 구동하기 위하여 크랭크축(3)이 회전자(4)에 고정되어 고정자(5)의 유도 전류에 의해 회전자와 함께 회전운동하게 된다.In general, a refrigerator compressor is for compressing at high pressure for the liquefaction of gaseous refrigerant, and a cylinder (2) for compressing the refrigerant is provided in the compressor case (1) as schematically shown in cross section in FIG. In order to drive the piston, the crankshaft 3 is fixed to the rotor 4 to rotate with the rotor by the induced current of the stator 5.

상기 크랭크축의 단부에는 커넥팅로드(6)가 연결되고, 그 커넥팅로드에는 피스톤(7)이 커넥팅 로드 단부에서 볼조인트 방식으로 커넥팅로드에 대하여 일정 각도 범위내에서 자유로이 회동가능하게 결합되어 커넥팅로드의 선회운동이 피스톤의 왕복운동으로 변환되도록 하여 피스톤에 의해 실린더내에서 냉매 가스가 압축될 수 있게 한다.A connecting rod 6 is connected to an end of the crankshaft, and a piston 7 is rotatably coupled to the connecting rod in a predetermined angle range with respect to the connecting rod in a ball joint manner at the connecting rod end. The motion is converted into a reciprocating motion of the piston so that the refrigerant gas can be compressed in the cylinder by the piston.

종래 피스톤(7)과 커넥팅로드의 볼(8) 결합방식은 도 2에 분해도로 도시된 바와같이 피스톤 내측 중앙부에 오목한 요홈부(11)가 커넥팅 로드의 볼 시트로서 형성된 컵부분(9)이 피스톤과 일체로 형성되고, 그 컵부분의 요홈부 내측면에 커넥팅로드의 볼부분(10)이 삽입되고, 컵부분의 개방된 단부에 인접한 요홈부 내측면에 는 환형의 테두리부분(12)이 형성되어 그곳에 테프론으로 단면이 직사각형으로 형성된 링(13)이 배치된다.Conventionally, the piston (7) and the connecting rod (8) of the connecting rod, as shown in the exploded view in FIG. 2, the cup portion (9) formed with a concave groove (11) formed as a ball seat of the connecting rod in the inner center of the piston is a piston And the ball portion 10 of the connecting rod is inserted into the groove portion inner surface of the cup portion, and the annular edge portion 12 is formed on the inner surface of the groove portion adjacent to the open end of the cup portion. Thereby, a ring 13 having a rectangular cross section of Teflon is disposed therein.

이와 같은 상태에서 상기 테두리부분(12)을 커넥팅로드의 볼 외측면을 향하여 밀착되게 코킹공정에 의해 오므림으로써 커넥팅로드의 볼이 컵부분의 요홈에서 이탈되지 않고 자유로이 회전가능하게 조립된다.In this state, the edge of the connecting rod 12 is pinched toward the ball outer surface of the connecting rod by a caulking process so that the ball of the connecting rod is freely rotatable without being detached from the groove of the cup portion.

그러나, 상기와 같은 종래의 볼조인트 피스톤의 결합구조에서는 압축기의 초기 운전시, 약 48시간정도의 시간 동안에 커넥팅 로드 단부의 볼이 컵부분속에서의 회전운동이 원활하지 못하고 볼과 컵부분의 요홈부 표면 사이에 마찰이 심하게 발생되어 압축기의 약 5%의 성능 저하가 발생되는 것으로 나타났으며, 이러한 초기 운전시 마찰에 의한 성능 저하 기간을 에이징단계라 부른다. 이러한 에이징과정의 발생 원인은 아직 정확히 밝혀진 것은 없으나, 볼의 하측 표면에 환형의 띠 형상으로 마찰 자국이 환형의 띠형상으로 형성되는 것으로부터 볼의 하측 외주면의 국소영역과 컵부분의 요부의 국소 표면과의 마찰이 집중됨에 의한 것으로 관찰 결과 판단되고 있다. However, in the coupling structure of the conventional ball joint piston as described above, during the initial operation of the compressor, the ball at the end of the connecting rod is not smoothly rotated in the cup portion for about 48 hours. The friction between the grooves is severely generated, resulting in about 5% of the performance degradation of the compressor. This period of performance degradation due to friction during the initial operation is called an aging step. The cause of the aging process is not yet known, but since the friction marks are formed in the annular band shape on the lower surface of the ball, the local area of the lower outer peripheral surface of the ball and the local surface of the recessed part of the cup part. The observation result is judged to be due to the concentration of friction with.

따라서, 볼조인트 피스톤의 컵부분과 볼 사이의 마찰을 감소시킴으로써, 냉장고 압축기의 초기 성능 저하를 감소시킬 수 있도록 볼과 컵부분의 결합구조 개선이 요망되고 있다.Therefore, by reducing the friction between the cup portion of the ball joint piston and the ball, it is desired to improve the coupling structure of the ball and the cup portion to reduce the initial performance degradation of the refrigerator compressor.

따라서, 본 발명의 목적은 종래 냉장고 압축기의 볼조인트 피스톤의 볼과 컵부분 사이의 마찰에 따른 압축기의 초기 성능 저하의 문제점을 해결하기 위하여 피 스톤의 컵부분의 요홈에 커넥팅 로드의 볼을 조립할 때 볼이 컵부분의 요홈 바닥의 국소 영역을 향하여 국과도한 압력이 발생되지 않도록 하여 컵부분 요홈의 국소 영역에서 과도한 마찰이 발생되지 않도록 개선된 구조의 냉장고 압축기의 볼조인트 피스톤을 제공하는 것이다.Therefore, an object of the present invention is to assemble the ball of the connecting rod in the groove of the cup portion of the piston in order to solve the problem of the initial performance degradation of the compressor due to friction between the ball and the piston portion of the ball joint piston of the conventional refrigerator compressor. It is to provide a ball joint piston of the refrigerator compressor of the structure which is improved so that the ball does not generate excessive pressure toward the local area of the groove bottom of the cup part so that excessive friction does not occur in the local area of the cup part groove.

상기한 목적을 달성하기 위한 본 발명의 냉장고 압축기용 볼조인트 피스톤은 커넥팅 로드의 볼이 자유로이 회전가능하게 피스톤 내측에 형성된 컵부분의 오목한 요홈에 맞물려 결합되는 냉장고 압축기의 볼조인트 피스톤로서, 컵부분의 요홈에 볼이 배치된 상태에서 코킹공정에 의해 컵부분의 상단부를 볼의 상면으로 만곡하여 조립할 때 컵부분의 상단부 내측에 제공되는 테프론의 링부재는 상측이 하측보다 두께가 감소되게 내측면이 경사면으로 형성되어 코킹공정에 의해 만곡되는 컵부분의 상단부의 볼에 대한 가압력이 일정하게 유지되도록 구성된다.Ball joint piston for a refrigerator compressor of the present invention for achieving the above object is a ball joint piston of the refrigerator compressor is coupled to the concave groove of the cup portion formed inside the piston so that the ball of the connecting rod freely rotatable, When the upper end of the cup portion is bent and assembled by the caulking process in the state where the ball is disposed in the groove, the inner surface of the teflon ring member provided inside the upper end of the cup portion is inclined so that the upper side is reduced in thickness than the lower side. It is formed so that the pressing force on the ball of the upper end of the cup portion curved by the caulking process is configured to be kept constant.

상기 링부재의 상부와 하부 두께의 차이는 코킹공정에 의해 볼의 상면에 대하여 컵부분의 상단부가 하측부분과 비교하여 만곡되는 정도의 차이만큼 설정되는 것이 바람직하다.The difference between the upper and lower thicknesses of the ring member is preferably set by the difference in degree of curvature of the upper end portion of the cup portion with respect to the upper surface of the ball by the caulking process compared to the lower portion.

이하, 본 발명의 실시예를 도시한 첨부 도면을 참고하여 본 발명을 상세히 설명하기로 한다.Hereinafter, with reference to the accompanying drawings showing an embodiment of the present invention will be described in detail the present invention.

도 3과 도 4에는 본 발명에 따라 압축기의 볼조인트 피스톤 결합구조가 도시되어 있으며, 본 발명에 따라 커넥팅 로드(30)의 볼(31)이 자유로이 회전가능하게 결합되는 피스톤(40) 내측에 형성된 컵부분(41)의 오목한 요홈(42) 상부 내측면에 코킹공정에 의해 견고하게 맞물리도록 조립될 때 볼(31)이 컵부분의 요홈(42) 바닥면을 향하여 과도하게 가압되지 않도록 개선된 구조의 링부재(43)가 제공된다.3 and 4 shows the ball joint piston coupling structure of the compressor according to the present invention, the ball 31 of the connecting rod 30 is formed inside the piston 40 to be rotatably coupled in accordance with the present invention Improved structure so that the ball 31 is not excessively pressed toward the bottom surface of the groove 42 of the cup portion when assembled to be firmly engaged with the upper inner surface of the concave groove 42 of the cup portion 41 by the caulking process The ring member 43 is provided.

상기 링부재(43)는 볼조인트 피스톤의 커넥팅 로드의 볼을 피스톤의 컵부분의 요홈에 조립할 때 컵부분의 상단부를 볼의 상면 외주면에 대하여 오므려지게 하여 볼이 요홈에서 빠지지 않고 유지되도록 하는 코킹공정에서 도 5에 도시된 바와같이 볼과 오므려지게 성형되는 컵부분의 상단부내에서 원활하게 회전하도록 볼을 유지하기 위하여 통상적으로 제공되는 테프론 재질의 환형의 부재와 기본적으로는 유사한 면이 있다.The ring member 43 is when the ball of the connecting rod of the ball joint piston is assembled into the groove of the cup portion of the piston, the upper end of the cup portion is pinched with respect to the outer peripheral surface of the upper surface of the ball caulking so that the ball does not fall out of the groove In the process, as shown in Fig. 5, there is basically a similar surface to the annular member of Teflon material which is conventionally provided to keep the ball to rotate smoothly within the upper end of the cup portion formed to be retracted with the ball.

그러나, 종래의 테프론 부재는 단면이 단순히 직사각형으로 이루어진 밴드 형상으로 되어 컵의 요홈 내측 상부에 배치된 다음 코킹공정에서 컵부분의 상부가 오므로질 때 컵부분의 최상단부가 하측보다 상대적으로 더 만곡되게 변형됨에 따라 균일한 두께의 테프론 부재의 상부가 하부보다 볼의 상면에 더 가압됨에 따라 컵부분의 바닥면을 향하여 볼을 가압하는 작용을 하게 되어 압축기의 초기 운전시 컵부분의 요홈 내측에 띠형상으로 국소 영역에 과도한 마찰이 발생되는 문제를 해결하기 위하여, 본 발명에 따른 링부재(43)는 도 4의 단면도로 도시된 바로부터 알 수 있듯이 상측이 하측보다 두께가 감소되게 내측면이 경사면으로 형성되어 있다.However, the conventional Teflon member has a rectangular cross-sectional shape that simply has a rectangular cross section so that the upper end of the cup portion is more curved than the lower side when the upper portion of the cup portion is placed in the caulking process. As it is deformed, the upper part of the Teflon member having a uniform thickness is pressed more on the upper surface of the ball than the lower part, thereby acting to press the ball toward the bottom surface of the cup part. In order to solve the problem that excessive friction is generated in the local area, the ring member 43 according to the present invention, as can be seen from the cross-sectional view of FIG. Formed.

상기 링부재의 상부와 하부 두께의 차이는 코킹공정에 의해 볼의 상면에 대하여 컵부분의 상단부가 하측부분과 비교하여 만곡되는 정도의 차이만큼 설정함으로써 코킹공정에 의해 컵부분의 상단부가 만곡되더라도 볼에 대하여 작용되는 가압력의 차이가 없도록 한다.The difference between the upper and lower thicknesses of the ring member is set by the difference between the upper end portion of the cup portion and the lower portion of the cup portion by the caulking process compared to the lower portion, so that the upper portion of the cup portion is curved by the caulking process. There should be no difference in the pressing force acting on the.

이에 따라, 커넥팅 로드의 볼이 피스톤의 컵부분의 요홈(42)에 배치되고, 컵부분의 요홈 상측 내면에 턱(44)이 환형으로 형성되어 테프론의 링부재를 배치하고 코킹공정에 의해 컵의 상단부를 만곡시켜 볼이 요홈에서 자유로이 회전할 수 있게 결합될 때 코킹공정에서 컵의 최상단부가 하측부분 보다 더 만곡되더라도 링부재의 하부 두께가 상부보다 얇게 형성되어 그러한 만곡되는 정도의 차이가 상쇄됨으로써 볼의 상면에는 테프론의 링부재가 균일한 가압력으로 작용하게 된다.Accordingly, the ball of the connecting rod is disposed in the groove 42 of the cup part of the piston, and the jaw 44 is formed in an annular shape on the upper inner surface of the groove of the cup part to arrange the ring member of Teflon and the caulking process of the cup. When the ball is bent to rotate freely in the groove when the upper part is bent, the lower part of the ring member is thinner than the upper part, even though the top end of the cup is bent in the caulking process. On the upper surface of the Teflon ring member acts as a uniform pressing force.

따라서, 종래 볼 조인트 피스톤을 갖는 압축기의 초기 운전기간에 볼과 피스톤 컵의 요홈 표면 사이에서의 과도한 국소 마찰에 의한 성능 저하 현상은 방지된다. Thus, the performance degradation caused by excessive local friction between the ball and the groove surface of the piston cup during the initial operation of the compressor having the ball joint piston is prevented.

본 발명에 따라, 커넥팅 로드의 볼이 자유로이 회전가능하게 결합되는 피스톤의 컵부분에 형성된 요홈(42)에 배치되어 커넥팅 로드의 볼이 피스톤의 컵부분의 요홈(42)에 배치되고, 요홈 상부에서 볼과의 사이에 상부가 하부 보다 단면 두께가 상대적으로 얇은 테프론의 링부재를 배치하여 코킹공정에 의해 만곡시켜 볼이 컵부분에서 자유로이 회전할 수 있게 유지되게 조립되며, 이때 코킹공정에 의한 컵부분의 상부의 만곡되는 정도의 차이만큼 링부재의 상부 두께를 하부 두께 보다 얇게 형성하여 볼에 대하여 균일한 압력이 작용하도록 함으로써, 종래 볼 조인트 피스톤을 갖는 압축기의 초기 운전기간에 볼과 피스톤 컵의 요홈 표면 사이에서의 과도한 국소 마찰에 의한 성능 저하 현상이 방지되어 제품 품질이 개선되는 효과가 있다. According to the invention, the ball of the connecting rod is disposed in the groove 42 formed in the cup portion of the piston to be rotatably coupled so that the ball of the connecting rod is disposed in the groove 42 of the cup portion of the piston, The Teflon ring member whose upper part is relatively thinner than the lower part is arranged between the ball and bent by the caulking process so that the ball can be freely rotated at the cup part, and the cup part by the caulking process By forming the upper thickness of the ring member to be thinner than the lower thickness by the difference in the degree of curvature of the upper part of the upper part, the uniform pressure acts on the ball, so that the groove of the ball and the piston cup in the initial operation period of the compressor having the conventional ball joint piston The performance degradation caused by excessive local friction between the surfaces is prevented, thereby improving product quality.

Claims (2)

커넥팅 로드(30)의 볼(31)이 자유로이 회전가능하게 피스톤(40) 내측에 형성된 컵부분(41)의 오목한 요홈(42)에 맞물려 결합되는 냉장고 압축기의 볼조인트 피스톤에 있어서, 컵부분의 요홈(42)에 볼이 배치된 상태에서 코킹공정에 의해 컵부분의 상단부를 볼의 상면으로 만곡하여 조립할 때 컵부분의 상단부 내측에 제공되는 테프론의 링부재(43)는 상측이 하측보다 두께가 감소되게 내측면이 경사면으로 형성되어 코킹공정에 의해 만곡되는 컵부분의 상단부의 볼에 대한 가압력이 일정하게 유지되도록 구성된 것을 특징으로 하는 냉장고 압축기용 볼 조인트 피스톤.In the ball joint piston of the refrigerator compressor in which the ball 31 of the connecting rod 30 is freely rotatably engaged with the concave groove 42 of the cup portion 41 formed inside the piston 40, the groove of the cup portion is provided. Teflon ring member 43 provided inside the upper end of the cup portion when the upper end of the cup portion is bent and assembled by the caulking process in the state where the ball is disposed at 42, the thickness of which is lower than that of the lower side. Ball joint piston for a refrigerator compressor, characterized in that the inner surface is formed in an inclined surface so that the pressing force on the ball of the upper end of the cup portion curved by the caulking process is kept constant. 제 1항에 있어서, 상기 링부재(43)의 상부와 하부 두께의 차이는 코킹공정에 의해 볼의 상면에 대하여 컵부분의 상단부가 하측부분과 비교하여 만곡되는 정도의 차이만큼 설정되는 것을 특징으로 하는 냉장고 압축기의 볼 조인트 피스톤.The method of claim 1, wherein the difference between the upper and lower thicknesses of the ring member 43 is set by the degree of the degree of curvature of the upper end of the cup portion compared to the lower portion with respect to the upper surface of the ball by the caulking process. Ball joint piston of refrigerator compressor.
KR1020040107611A 2004-12-17 2004-12-17 A ball jointed piston for a compressor of refrigerators KR100581395B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10520012B1 (en) 2015-04-14 2019-12-31 Roller Bearing Company Of America, Inc. Rod end having wear mitigation features for an augmenter nozzle on a jet engine turbine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62248878A (en) 1986-04-21 1987-10-29 Matsushita Refrig Co Piston device for enclosed motor compressor
JPH01294978A (en) * 1988-05-19 1989-11-28 Sanyo Electric Co Ltd Piston device in compressor
JPH03260381A (en) * 1990-03-12 1991-11-20 Sanyo Electric Co Ltd Piston device of compressor
KR19980013857A (en) * 1996-08-05 1998-05-15 배순훈 Compressor with detachable piston

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62248878A (en) 1986-04-21 1987-10-29 Matsushita Refrig Co Piston device for enclosed motor compressor
JPH01294978A (en) * 1988-05-19 1989-11-28 Sanyo Electric Co Ltd Piston device in compressor
JPH03260381A (en) * 1990-03-12 1991-11-20 Sanyo Electric Co Ltd Piston device of compressor
KR19980013857A (en) * 1996-08-05 1998-05-15 배순훈 Compressor with detachable piston

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10520012B1 (en) 2015-04-14 2019-12-31 Roller Bearing Company Of America, Inc. Rod end having wear mitigation features for an augmenter nozzle on a jet engine turbine

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