KR20000047338A - Structure for preventing rotation of piston for variable capacity swash plate type compressor - Google Patents

Structure for preventing rotation of piston for variable capacity swash plate type compressor Download PDF

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Publication number
KR20000047338A
KR20000047338A KR1019980064141A KR19980064141A KR20000047338A KR 20000047338 A KR20000047338 A KR 20000047338A KR 1019980064141 A KR1019980064141 A KR 1019980064141A KR 19980064141 A KR19980064141 A KR 19980064141A KR 20000047338 A KR20000047338 A KR 20000047338A
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KR
South Korea
Prior art keywords
piston
swash plate
rotation
cylinder bore
variable displacement
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KR1019980064141A
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Korean (ko)
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KR100563850B1 (en
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안휴남
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신영주
한라공조 주식회사
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Priority to KR1019980064141A priority Critical patent/KR100563850B1/en
Publication of KR20000047338A publication Critical patent/KR20000047338A/en
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Publication of KR100563850B1 publication Critical patent/KR100563850B1/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
    • F04B27/0873—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
    • F04B27/1054—Actuating elements
    • 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
    • F05B2210/14—Refrigerants with particular properties, e.g. HFC-134a
    • 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)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

PURPOSE: A structure for preventing the rotation of a piston for a swash plate type compressor is provided to reduce the entire outer diameter of a compressor by reducing the size and weight of a piston. CONSTITUTION: To limit the rotation of a piston(2) with rotational resistance of a swash plate, a couple of stopper groves(47) are formed along the axial direction of the piston up to a certain position of a piston head(3). The stopper grooves are located without exceeding the outer diameter of the piston or the inner diameter of a cylinder bore(13). A guide groove(17) is formed lengthwise on an inner circumference(18) of a front housing(11) to have a width corresponding to the distance between the stopper grooves. Therefore, in moving the piston back and forth in the cylinder bore, the piston is prevented from rotating by contacting the opposite stopper groove with the inner circumference of the front housing.

Description

가변용량형 사판식 압축기의 피스톤 회전방지구조Piston anti-rotation structure of variable displacement swash plate compressor

본 발명은 가변용량형 사판식 압축기의 피스톤 회전방지구조에 관한 것으로서, 특히 피스톤의 크기 및 중량을 줄일 수 있고, 이에 따라 압축기 전체 외경을 감소시킬 수 있는 가변용량형 사판식 압축기의 피스톤 회전방지구조에 관한 것이다.The present invention relates to a piston anti-rotation structure of a variable displacement swash plate compressor, and in particular, it is possible to reduce the size and weight of the piston, thereby reducing the overall outer diameter of the piston piston anti-rotation structure of the variable displacement swash plate compressor It is about.

일반적으로 가변용량형 사판식 압축기는 하우징의 내부에는 구동축이 회전가능하게 지지되어 있고, 하우징의 일부를 구성하는 실린더블록에는 다수의 실린더 보어가 형성되고, 각 실린더 보어 내에는 피스톤이 왕복운동가능하게 수용된다. 이 피스톤은 실린더 보어내에서 전후진함으로써 실질적으로 냉매를 흡입 및 압축하는 피스톤 헤드부와, 상기 피스톤 헤드부의 상단부 후측으로 연장되어 아래로 굴곡됨으로써 웨브부 및 외측플랜지를 가짐과 아울러 피스톤 헤드부 배면에 상기 외측플랜지와 대응하여 내측플랜지를 가지고 이 웨브부 및 플랜지들에 의하여 좌우 및 아래쪽이 개방된 삽입공간을 가지는 브릿지부로 이루어져 있다. 그리고, 상기한 바와 같이 이루어진 피스톤은 구동축에 이와 함께 회전가능하게 설치됨과 아울러 경사운동이 가능하게 설치되는 사판의 가장자리가 피스톤의 브릿지부에 의해 형성되는 삽입공간에 삽입됨으로써 사판의 회전에 따라 전후이동된다. 사판의 경사운동이 원활하게 이루어질 수 있도록 플랜지들의 내면에는 슈우 포켓이 형성되고, 이 슈우 포켓에 대략 반구형으로 이루어진 슈우가 삽입되어 사판의 양면을 지지하고 있다. 또한, 피스톤의 전후이동시 사판의 회전저항에 따른 피스톤의 회전운동을 제한하기 위하여 피스톤에 회전방지구조가 형성된다.In general, the variable displacement swash plate type compressor is rotatably supported inside the housing, a plurality of cylinder bores are formed in the cylinder block constituting part of the housing, and the piston is reciprocally movable in each cylinder bore. Are accepted. The piston has a piston head portion that substantially sucks and compresses refrigerant by advancing back and forth in the cylinder bore, and extends to the rear of the upper end of the piston head portion and is bent downward to have a web portion and an outer flange, and to the rear of the piston head portion. A bridge portion having an inner flange corresponding to the outer flange and having an insertion space open to the left and right sides by the web portion and the flanges. In addition, the piston made as described above is rotatably installed along with the drive shaft, and the edge of the swash plate which is installed to allow the inclined movement is inserted into the insertion space formed by the bridge portion of the piston, thereby moving back and forth in accordance with the rotation of the swash plate. do. Shoe pockets are formed on the inner surfaces of the flanges so as to smoothly incline the swash plate, and a shoe having a substantially hemispherical shape is inserted into the shoe pocket to support both sides of the swash plate. In addition, in order to limit the rotational movement of the piston according to the rotational resistance of the swash plate during the front and rear movement of the piston is formed a rotation prevention structure.

이러한 종래 피스톤 회전방지구조로서, 미국 특허 제5,706,716호에 개시된 것이 알려져 있다. 이 피스톤 회전방지구조는, 도 5에 도시된 바와 같이, 피스톤(7)은 브릿지부(71)의 웨브부(72) 양쪽에 형성되는 돌기부(73,73)를 가져, 실린더 블록(9)에 형성된 실린더 보어(73)에 삽입됨으로써 피스톤(7)이 사판(미도시)의 회전에 따라 전후진할 때 사판의 회전에 따른 회전저항을 피스톤(7)이 받아 회전하는 시점에서 실린더 보어(91)의 내경 범위를 벗어나 크게 돌출된 돌기부(73)들이 전방 하우징(10)의 내면에 접촉함으로써 피스톤(7)의 회전이 방지되도록 되어 있다.As such a conventional piston anti-rotation structure, one disclosed in US Pat. No. 5,706,716 is known. This piston anti-rotation structure, as shown in Fig. 5, the piston (7) has projections (73, 73) formed on both sides of the web portion 72 of the bridge portion 71, the cylinder block (9) The cylinder bore 91 is inserted into the formed cylinder bore 73 when the piston 7 receives and rotates the rotational resistance according to the rotation of the swash plate when the piston 7 moves forward and backward according to the rotation of the swash plate (not shown). The projections 73 protruding out of the inner diameter range of the large contact the inner surface of the front housing 10 is to prevent the rotation of the piston (7).

그러나, 상기한 바와 같은 피스톤 회전방지구조에 있어서는, 돌기부(73)들이 실린더 보어(91)의 내경(또는 피스톤(7)의 외경) 범위를 벗어나 크게 돌출되어 있기 때문에 피스톤(7)의 크기 및 중량이 증대될 뿐만 아니라 전방 하우징(10)의 내경 및 외경이 증가되는 문제점을 가지고 있다.However, in the piston anti-rotation structure as described above, the size and weight of the piston 7 because the projections 73 protrude greatly out of the range of the inner diameter (or outer diameter of the piston 7) of the cylinder bore 91. Not only is this increased, there is a problem that the inner and outer diameters of the front housing 10 are increased.

본 발명은 상기한 종래 문제점들을 감안하여 안출된 것으로서, 피스톤의 크기 및 중량을 줄일 수 있고, 이에 따라 압축기의 전체 외경을 감소시킬 수 있는 사판식 압축기의 피스톤 회전방지구조의 제공을 목적으로 한다.The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a piston anti-rotation structure of a swash plate compressor, which can reduce the size and weight of the piston and, accordingly, reduce the overall outer diameter of the compressor.

도 1은 본 발명에 따른 피스톤 회전방지구조가 형성된 피스톤을 나타내는 측면도이다.1 is a side view showing a piston having a piston anti-rotation structure according to the present invention.

도 2는 본 발명에 따른 피스톤 회전방지구조가 형성된 피스톤이 실린더 보어에 장착된 상태를 나타내는 요부 단면도이다.Figure 2 is a sectional view of the main part showing a state in which a piston with a piston anti-rotation structure according to the present invention is mounted on a cylinder bore.

도 3는 본 발명에 따른 피스톤 회전방지구조의 작용상태를 나타내는 요부 단면도이다.Figure 3 is a sectional view of the main portion showing the action of the piston anti-rotation structure according to the present invention.

도 4는 본 발명에 따른 피스톤 회전방지구조가 형성된 피스톤이 장착된 가변용량형 사판식 압축기를 나타내는 개략적인 단면도이다.Figure 4 is a schematic cross-sectional view showing a variable displacement swash plate type compressor equipped with a piston with a piston anti-rotation structure according to the present invention.

도 5는 종래 피스톤 회전방지구조가 형성된 피스톤이 실린더 보어에 설치된 상태를 나타내는 요부 단면도이다.5 is a sectional view showing the main parts of a piston having a conventional piston anti-rotation structure installed in a cylinder bore.

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

2 : 피스톤, 3 : 피스톤 헤드부,2: piston, 3: piston head,

11 : 전방 하우징, 12 : 실린더 블록11: front housing, 12: cylinder block

13 : 실린더 보어, 17 : 가이드홈,13: cylinder bore, 17: guide groove,

41 : 내측 플랜지, 42 : 웨브부,41: inner flange, 42: web portion,

43 : 외측 플랜지, 47 : 스토퍼홈,43: outer flange, 47: stopper groove,

18 : 전방 하우징 내주면18: inner peripheral surface of the front housing

상기 목적을 달성하기 위하여, 본 발명에 따른 피스톤 회전방지구조는, 피스톤 헤드부와, 상기 피스톤 헤드부의 배면에 형성되는 내측 플랜지, 상기 내측 플랜지의 상단으로부터 피스톤 헤드부의 축방향으로 연장되는 웨브부 및 상기 내측 플랜지와 대향하도록 상기 웨브부의 끝단으로부터 아래로 굴곡되는 외측 플랜지를 가진 브릿지부를 구비하여 이루어지는 피스톤에 있어서 그 피스톤의 회전을 제한하기 위한 가변용량형 사판식 압축기의 피스톤 회전방지구조로서, 상기 웨브부의 상면 양단으로부터 피스톤의 축방향을 따라 피스톤 헤드부 쪽으로 소정의 위치까지 형성된 한 쌍의 스토퍼홈과; 상기 스토퍼홈들 사이의 거리에 대응하는 폭을 가지도록 전방 하우징(11)의 내주면에 그 길이방향을 따라 형성되는 가이드홈을 포함하여 이루어지는 것을 특징으로 한다.In order to achieve the above object, the piston anti-rotation structure according to the present invention, the piston head portion, the inner flange formed on the rear surface of the piston head portion, the web portion extending in the axial direction of the piston head portion from the upper end of the inner flange and A piston comprising a bridge portion having an outer flange bent downward from an end of the web portion so as to face the inner flange, the piston anti-rotation structure of a variable displacement swash plate type compressor for limiting rotation of the piston, the web A pair of stopper grooves formed from both ends of the upper surface to a predetermined position in the axial direction of the piston toward the piston head portion; It characterized in that it comprises a guide groove formed along the longitudinal direction on the inner peripheral surface of the front housing 11 to have a width corresponding to the distance between the stopper grooves.

상기한 바와 같이 구성된 본 발명의 피스톤 회전방지구조에 따르면, 실린더 보어 내에서 사판의 회전에 따라 피스톤이 전후진할 때 사판의 회전에 의하여 피스톤은 회전저항을 전달받지만 피스톤의 회전시작시점에서 회전방향과는 반대쪽에 위치하는 스토퍼홈이 가이드홈과 인접한 전방 하우징(11)의 내주면에 걸리므로 피스톤의 회전이 방지되고, 가이드홈은 피스톤의 전후진을 안내하는 역할을 하게 된다.According to the piston anti-rotation structure of the present invention configured as described above, when the piston is moved forward and backward in accordance with the rotation of the swash plate in the cylinder bore by the rotation of the swash plate, the piston receives a rotational resistance, but the direction of rotation at the start of rotation of the piston Stopper groove located on the opposite side is caught on the inner circumferential surface of the front housing 11 adjacent to the guide groove, thereby preventing rotation of the piston, and the guide groove serves to guide the piston forward and backward.

본 발명의 다른 특징 및 이점들은 첨부도면에 의거한 다음의 상세한 설명으로 더욱 명백해질 것이다.Other features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

도 4에 도시된 바와 같이, 참조부호 1은 가변용량형 사판식 압축기로서, 전방 하우징(11)의 내부에는 구동축(14)이 회전가능하게 지지되어 있고, 전방 하우징(11)은 뒤쪽에는 실린더블록(12)이 결합되어 있다. 이 실린더블록(12)에는 다수의 실린더 보어(13)가 형성됨과 아울러 각 실린더 보어(13) 내에는 피스톤(2)이 왕복운동가능하게 수용된다.As shown in FIG. 4, reference numeral 1 is a variable displacement swash plate type compressor, in which a drive shaft 14 is rotatably supported inside the front housing 11, and the front housing 11 has a cylinder block at the rear thereof. (12) is combined. A plurality of cylinder bores 13 are formed in the cylinder block 12, and the piston 2 is accommodated in each cylinder bore 13 so as to reciprocate.

그리고, 피스톤(2)은 도 1에 도시된 바와 같이, 실린더 보어(13)내에서 전후진함으로써 실질적으로 냉매를 흡입 및 압축하는 피스톤 헤드부(3)와; 상기 피스톤 헤드부(3)의 상단부 후측으로 연장되어 아래로 굴곡됨으로써 웨브부(42) 및 외측플랜지(43)를 가짐과 아울러 피스톤 헤드부(3) 배면에 상기 외측플랜지(43)와 대응하여 내측플랜지(41)를 가지고 이 웨브부(42) 및 플랜지들(41,43)에 의하여 좌우 및 아래쪽이 개방된 삽입공간(44)을 가진다. 또한, 도 1 및 도 4에 도시된 바와 같이 구동축(14)에는 이와 함께 회전가능하게 경사진 상태로 사판(15)이 축착되고, 이 사판(15)의 가장자리는 피스톤(2)의 삽입공간(44)에 삽입된다. 따라서, 구동축(14)과 함께 사판(15)이 회전하면 사판(15)의 위상이 연속적으로 변함으로써 피스톤(2)이 실린더 보어(13) 내에서 전후이동하게 된다. 사판(15)의 회전이 원활하게 이루어질 수 있도록 플랜지들(41,43)의 내면에는 슈우 포켓(45)이 각각 형성되고, 이 슈우 포켓(45)들에 대략 반구형으로 이루어진 슈우(46)가 각각 삽입되어 사판(15)의 양면을 지지하고 있다.And, as shown in FIG. 1, the piston 2 includes a piston head portion 3 which sucks and compresses the refrigerant substantially by moving back and forth in the cylinder bore 13; It extends to the rear end of the upper end of the piston head 3 and is bent downward to have a web portion 42 and an outer flange 43 and to correspond to the outer flange 43 on the back of the piston head 3. It has a flange 41 and has an insertion space 44 which is open to the left and right by the web part 42 and the flanges 41 and 43. In addition, as shown in FIGS. 1 and 4, the swash plate 15 is attached to the drive shaft 14 in a rotatably inclined state, and the edge of the swash plate 15 has an insertion space of the piston 2 ( 44). Therefore, when the swash plate 15 rotates together with the drive shaft 14, the phase of the swash plate 15 continuously changes, causing the piston 2 to move back and forth within the cylinder bore 13. In order to smoothly rotate the swash plate 15, shoe pockets 45 are formed on the inner surfaces of the flanges 41 and 43, respectively, and shoe 46, which has a substantially hemispherical shape, is formed in the shoe pockets 45, respectively. It is inserted to support both sides of the swash plate 15.

본 발명에 따르면, 피스톤(2)의 전후이동시 사판(15)의 회전에 의하여 회전저항을 받음으로써 피스톤(2)이 회전운동하는 것을 제한하기 위하여, 도 1 및 도 3에 도시된 바와 같이, 상기 웨브부(42)의 상면 양단으로부터 피스톤(2)의 축방향을 따라 피스톤 헤드부(3) 쪽으로 소정의 위치까지 한 쌍의 스토퍼홈(47,47)이 형성된다. 따라서, 스토퍼홈(47)들은 피스톤(2)의 외경 또는 실린더 보어(13)의 내경의 범위를 넘지 않은 영역에 위치하게 된다. 그리고, 상기 스토퍼홈(47)들과 대응하여 상기 스토퍼홈(47)들 사이의 거리에 대응하는 폭을 가지도록 전방 하우징(11)의 내주면에는 그 길이방향을 따라 가이드홈(17)이 형성된다.According to the present invention, in order to limit the rotational movement of the piston 2 by receiving a rotational resistance by the rotation of the swash plate 15 during the forward and backward movement of the piston 2, as shown in Figs. A pair of stopper grooves 47 and 47 are formed from the upper end of the web portion 42 to the predetermined position toward the piston head portion 3 along the axial direction of the piston 2. Accordingly, the stopper grooves 47 are located in an area not exceeding the range of the outer diameter of the piston 2 or the inner diameter of the cylinder bore 13. In addition, a guide groove 17 is formed along the longitudinal direction of the inner circumferential surface of the front housing 11 to have a width corresponding to the distance between the stopper grooves 47 corresponding to the stopper grooves 47. .

본 발명에 따르면, 스토퍼홈(47)들의 길이는 웨브부(42)의 길이만큼 형성되는 것이 바람직하지만 피스톤(2)의 전후진에 따른 실린더 보어(13)의 용적을 벗어나지 않는 위치까지 상기 가이드홈(17)의 길이를 고려하여 더 길게 형성되어도 무방하다. 역으로 가이드홈(17)은 스토퍼홈(47)들의 길이에 대응하여 피스톤(2)의 행정에 따라 피스톤(2)과 대응하는 범위를 벗어나지 않는 길이로 형성되어야 한다.According to the invention, the length of the stopper groove 47 is preferably formed by the length of the web portion 42, but the guide groove to a position not to deviate from the volume of the cylinder bore 13 along the front and rear of the piston (2) It may be formed longer in consideration of the length of (17). On the contrary, the guide groove 17 should be formed in a length that does not depart from the range corresponding to the piston 2 according to the stroke of the piston 2 corresponding to the length of the stopper grooves 47.

따라서, 피스톤(2)이 도 2와 같이 정상상태로부터 사판(15)의 회전에 따라 실린더 보어(13) 내부를 전후진할 때 사판(15)의 회전에 의하여 피스톤(2)은 회전저항을 전달받지만 피스톤(2)의 회전시작시점에서 피스톤(2)의 회전방향과는 반대쪽 스토퍼홈(47)이 가이드홈(17)과 인접한 위치의 전방 하우징(11)의 내주면(18)에 도 3의 A부와 같이 접촉함으로써 피스톤(2)의 회전이 방지된다. 이 때, 도 3에 도시된 B부는 미접촉상태임을 나타낸다.Therefore, when the piston 2 advances back and forth the inside of the cylinder bore 13 in accordance with the rotation of the swash plate 15 from the normal state as shown in FIG. 2, the piston 2 transmits a rotational resistance by the rotation of the swash plate 15. A stopper groove 47 opposite to the direction of rotation of the piston 2 at the start of rotation of the piston 2 is provided on the inner circumferential surface 18 of the front housing 11 at a position adjacent to the guide groove 17. By contacting negatively, rotation of the piston 2 is prevented. At this time, part B shown in FIG.

상기한 바와 같이 구성된 본 발명에 따른 가변용량형 사판식 압축기의 피스톤 회전방지구조에 있어서는, 종래와 같이 실린더 보어(13)의 내경 범위를 벗어나는 돌기부를 별도로 더 설치하는 것이 아니라 축 방향으로 형성됨으로써 실린더 보어(13)의 내경 범위를 벗어나지 않는 된 한 쌍의 스토퍼홈(47,47)이 종래 회전방지용 돌기부의 역할을 하도록 함으로써 피스톤(2)의 중량 및 크기를 줄일 수 있어 피스톤(2)의 제조원가를 낮출 수 있다.In the piston anti-rotation structure of the variable displacement swash plate compressor according to the present invention configured as described above, the cylinder is formed in the axial direction rather than additionally provided with a protrusion that is outside the inner diameter range of the cylinder bore 13 as in the related art. As long as the pair of stopper grooves 47 and 47 serve as a conventional anti-rotation protrusion, the weight and size of the piston 2 can be reduced, so that the cost of manufacturing the piston 2 can be reduced. Can be lowered.

또한, 한 쌍의 스토퍼홈(47,47)이 실린더 보어(13)의 내경 범위를 벗어나지 않게 되어 전방 하우징(11)의 내경 및 외경을 감소시킬 수 있어 압축기 전체 외경을 감소시킬 수 있다.In addition, the pair of stopper grooves 47 and 47 do not depart from the inner diameter range of the cylinder bore 13 so that the inner and outer diameters of the front housing 11 can be reduced, thereby reducing the total outer diameter of the compressor.

Claims (2)

피스톤 헤드부와; 상기 피스톤 헤드부의 배면에 형성되는 내측 플랜지, 상기 내측 플랜지의 상단으로부터 피스톤 헤드부의 축방향으로 연장되는 웨브부 및 상기 내측 플랜지와 대향하도록 상기 웨브부의 끝단으로부터 아래로 굴곡되는 외측 플랜지를 가진 브릿지부를 구비한 가변용량형 사판식 압축기의 피스톤의 회전을 제한하기 위한 가변용량형 사판식 압축기의 피스톤 회전방지구조로서,A piston head portion; A bridge portion having an inner flange formed on the rear surface of the piston head portion, a web portion extending in the axial direction of the piston head portion from an upper end of the inner flange, and an outer flange bent downward from an end of the web portion so as to face the inner flange. A piston anti-rotation structure of a variable displacement swash plate compressor for restricting the rotation of a piston of a variable displacement swash plate compressor, 상기 웨브부의 상면 양단으로부터 피스톤의 축방향을 따라 피스톤 헤드부 쪽으로 소정의 위치까지 형성된 한 쌍의 스토퍼홈과;A pair of stopper grooves formed up to a predetermined position from both ends of the upper surface of the web portion toward the piston head portion along the axial direction of the piston; 상기 스토퍼홈들 사이의 거리에 대응하는 폭을 가지도록 전방 하우징의 내주면에 그 길이방향을 따라 형성되는 가이드홈을 포함하여 이루어지는 것을 특징으로 하는 가변용량형 사판식 압축기의 피스톤 회전방지구조.Piston anti-rotation structure of a variable displacement swash plate type compressor comprising a guide groove formed in the longitudinal direction on the inner peripheral surface of the front housing to have a width corresponding to the distance between the stopper grooves. 제 1 항에 있어서, 상기 스토퍼홈들은 피스톤의 외경 또는 실린더 보어의 내경의 범위를 넘지 않는 영역에 위치함을 특징으로 하는 가변용량형 사판식 압축기의 피스톤 회전방지구조.The piston anti-rotation structure of a variable displacement swash plate compressor of claim 1, wherein the stopper grooves are located in a region not exceeding a range of an outer diameter of the piston or an inner diameter of the cylinder bore.
KR1019980064141A 1998-12-31 1998-12-31 Anti-rotating piston structure for variable capacity wobble palte compressors KR100563850B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100558702B1 (en) * 1999-03-20 2006-03-10 한라공조주식회사 Wobble plate type compressor with variable displacement
KR100735718B1 (en) * 2001-05-15 2007-07-06 한라공조주식회사 Anti-rotating piston for capacity wobble plate compressor
KR100772242B1 (en) * 2001-05-15 2007-11-01 한라공조주식회사 Anti-rotating piston for capacity wobble plate compressor
KR102147797B1 (en) * 2020-03-24 2020-08-26 서재진 Axial piston type air motor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2573362Y2 (en) * 1990-09-04 1998-05-28 株式会社豊田自動織機製作所 Piston guide structure for variable displacement swash plate compressor
JP3155858B2 (en) * 1993-05-10 2001-04-16 サンデン株式会社 Swash plate compressor
JP3536396B2 (en) * 1994-12-28 2004-06-07 株式会社豊田自動織機 Piston rotation restricting structure in piston type compressor
JPH10169558A (en) * 1996-12-09 1998-06-23 Toyota Autom Loom Works Ltd Single-head piston type compressor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100558702B1 (en) * 1999-03-20 2006-03-10 한라공조주식회사 Wobble plate type compressor with variable displacement
KR100735718B1 (en) * 2001-05-15 2007-07-06 한라공조주식회사 Anti-rotating piston for capacity wobble plate compressor
KR100772242B1 (en) * 2001-05-15 2007-11-01 한라공조주식회사 Anti-rotating piston for capacity wobble plate compressor
KR102147797B1 (en) * 2020-03-24 2020-08-26 서재진 Axial piston type air motor

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