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1. EP1712788 - INCLINED ROTATION CONTROL DEVICE OF VARIABLE DISPLACEMENT HYDRAULIC PUMP

Office European Patent Office
Application Number 04799844
Application Date 19.11.2004
Publication Number 1712788
Publication Date 18.10.2006
Publication Kind A1
IPC
F04B 1/32
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
1Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
12having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
26Control
30of machines or pumps with rotary cylinder blocks
32by varying the relative positions of a swash plate and a cylinder block
F04B 49/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
49Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups F04B1/-F04B47/196
CPC
F04B 1/324
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
1Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
12having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
26Control
30of machines or pumps with rotary cylinder blocks
32by varying the relative positions of a swash plate and a cylinder block
324by changing the inclination of the swash plate
F04B 49/002
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
49Control ; , e.g. of pump delivery, or pump pressure; of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
002Hydraulic systems to change the pump delivery
Applicants HITACHI CONSTRUCTION MACHINERY
Inventors NIIDOME TAKASHI
YABUUCHI YOSHITOMO
KOBAYASHI TAKESHI
Designated States
Priority Data 2004000529 05.01.2004 JP
Title
(DE) GENEIGTE DREHSTEUERVORRICHTUNG EINER HYDRAULIKPUMPE MIT VARIABLER VERDRĂ„NGUNG
(EN) INCLINED ROTATION CONTROL DEVICE OF VARIABLE DISPLACEMENT HYDRAULIC PUMP
(FR) DISPOSITIF DE COMMANDE DE ROTATION INCLINE DESTINE A UNE POMPE HYDRAULIQUE A DEPLACEMENT VARIABLE
Abstract
(EN)
A motion converting section (31) and a translation bar (33) of a feedback mechanism (30) are provided between a lateral side of a swash plate (21) and a control sleeve (26) of a regulator (24). When the swash plate (21) is in a neutral position, the motion converting section (31) is located in an initial position (F-F) at one end of axial direction along an axis line (O-O) passing through a tilting center (C) of tilting motions, and, when the swash plate (21) is driven to tilt in a forward or reverse direction, displaced to the other end of axial direction along the axis line (O-O) to convert a tilting motion of the swash plate (21) into an axial displacement. Through the translation bar (33), the axial displacement is transmitted to the control sleeve (26) of the regulator (24) as an axial displacement.