Swash plate type hydraulic unit

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

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F04B 1/22 (2006.01) F04B 1/20 (2006.01) F16H 39/14 (2006.01)

Patent

CA 2303035

In a swash plate type hydraulic unit for use as a swash plate type hydraulic pump and a hydraulic motor, a plurality of block plates 4 1 to 4 5 being divided at split planes extending orthogonal to a cylinder block axis X are soldered to one another to form a cylinder block 4. Inlet holes 25i and 39i for supporting plungers 27 and 41 slidably therein are formed in an inlet-side one of the block plates 4 1, 4 2 ; 4 4, 4 5 located close to plunger swash plates 9a and 19a, while in remaining inner-side ones of the block plates 4 3 to 4 5 ; 4 1 to 4 3 are formed inner holes 25o and 39o of a diameter larger than that of the inlet holes 25i and 39i, the inner holes 25o and 39o each defining an oil chamber to which the outer peripheral surface of the associated plunger 27, 41 faces. With this arrangement, a cylinder block structure superior in mass-productivity is provided.

Dispositif hydraulique à plateaux inclinés, qui peut être utilisé comme pompe hydraulique à plateaux inclinés, et moteur hydraulique, qui comprend une pluralité de plateaux (41-45) divisés suivant des plans orthogonaux par rapport à un axe de bloc-cylindres (X) et brasés les uns sur les autres de façon à constituer un bloc-cylindres (4); des plateaux de bloc côté entrée (41, 42, 44, 45), disposés près des plateaux inclinés (9a, 19a) à pistons plongeurs et présentant des alésages d'entrée (25i, 39i) qui portent des pistons plongeurs (27, 41) coulissants; et d'autres plateaux de bloc côté postérieur (43-45; 41-43), présentant des orifices postérieurs (25o, 39o) dont le diamètre est supérieur à celui des alésages d'entrée (25i, 39i) et définissant une chambre à huile opposée aux surfaces périphériques externes des pistons plongeurs (27, 41). Cette structure de bloc-cylindres convient très bien pour une production de masse.

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