Method and device for fabricating piston assembly

F - Mech Eng,Light,Heat,Weapons – 04 – B

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F04B 27/08 (2006.01) F04B 39/14 (2006.01)

Patent

CA 2234056

The invention is intended to permit automatic installation of pistons and shoes on a swash plate, for reducing in costs and improving the quality of a swash plate type compressor. A slide table 52 is provided which is movable in a direction perpendicular to the axis O of a rotating shaft 2. A plurality of pistons 4 to be assembled are disposed on the, slide table 52 in a manner parallel to one another. When the slide table 52 is advanced, the shoes 7 disposed within a notch 4a in each of the pistons 4 on the slide table 52 are raised to a substantially vertical position by means of a presser member 54 and the piston 4 is aligned with the peripheral edge of the awash plate. A pair of heads 50 and 51 for supporting the rotating shaft 2 are provided with a shaft support portion 55 for supporting the rotating shaft 2 thereon. A plurality of piston support portions 67 for supporting the pistons are provided around the shaft support portion at circumferential positions. The pistons on the slide table 52 are supported by the piston support portions 57 in their assembled positions on the peripheral edge of the swash plate. The piston support portions 67 are unitarily rotated a predetermined pitch in synchronous with advancement of the slide table. 46

L'invention permet de diminuer le coût d'un compresseur à plateau oscillant et d'en améliorer la qualité en automatisant complètement le montage d'un piston et d'un sabot au plateau oscillant. Un plateau coulissant (52) est mobile dans un sens perpendiculaire à l'axe 0 d'un arbre rotatif (2) et un piston devant être monté sur le plateau coulissant (52) est situé parallèle à ce dernier. Le plateau coulissant (52) est avancé, de sorte qu'un sabot (7) situé dans une encoche (4a) du piston (4) sur le plateau coulissant (52) est élevé par un élément de pression (54) et que le piston (4) est aligné sur la partie périphérique du plateau oscillant. Une partie (65) servant à supporter l'arbre rotatif est située sur une paire de têtes de support (50, 51) supportant l'arbre rotatif (2) et des parties (67) servant à supporter le piston sont situées au niveau d'une pluralité de parties périphériques le long de la circonférence du piston. Ce piston sur le plateau coulissant (52) est supporté par les parties (67) dans un état dans lequel le piston est monté sur la partie périphérique du plateau oscillant et les parties respectives (67) de support du piston sont mises en rotation ensemble à un pas prédéterminé synchronisé à l'avance du plateau coulissant.

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