HYDRAULIC PISTON PUMP MOTOR

PURPOSE: To sufficiently enable use even if a vibration control material is not used by attaining vibration reduction and noise reduction of a hydraulic piston pump motor itself. CONSTITUTION: In a hydraulic pump 20, a pair of front pump 21a and rear pump 21b are opposed to each other, and rotary sh...

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Bibliographische Detailangaben
Hauptverfasser:	UMEDA TOKIHIKO, KAWABATA SACHIO
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING HEATING LIGHTING MECHANICAL ENGINEERING POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE: To sufficiently enable use even if a vibration control material is not used by attaining vibration reduction and noise reduction of a hydraulic piston pump motor itself. CONSTITUTION: In a hydraulic pump 20, a pair of front pump 21a and rear pump 21b are opposed to each other, and rotary shafts are connected to each other by a pump joint 31 so as to mutually negate vibrations generated according to phases of reciprocating motion of respective pistons. The front pump 21a and the rear pump 21b are variable delivery pumps which have the same constitution and whose swash plate 23a inclines to a driving shaft 22 and inclination is controlled by a servo piston 27a constituting a regulator. Since vibration and a noise generated by the hydraulic pump 20 itself are reduced, they can be directly installed on a bracket 32.