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1. WO2020110946 - HYDRAULIC DRIVING APPARATUS

Publication Number WO/2020/110946
Publication Date 04.06.2020
International Application No. PCT/JP2019/045812
International Filing Date 22.11.2019
IPC
F15B 11/02 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
11Servomotor systems without provision for follow-up action
02Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member
E02F 9/22 2006.01
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
FDREDGING; SOIL-SHIFTING
9Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/-E02F7/160
20Drives; Control devices
22Hydraulic or pneumatic drives
CPC
E02F 9/22
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
FDREDGING; SOIL-SHIFTING
9Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
20Drives; Control devices
22Hydraulic or pneumatic drives
F15B 11/02
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
11Servomotor systems without provision for follow-up action; ; Circuits therefor
02Systems essentially incorporating special features for controlling the speed or actuating force of an output member
Applicants
  • 日立建機株式会社 HITACHI CONSTRUCTION MACHINERY CO., LTD. [JP]/[JP]
Inventors
  • 伊藤 和裕 ITOH Kazuhiro
  • 沼口 和弘 NUMAGUCHI Kazuhiro
Agents
  • 特許業務法人広和特許事務所 HIROWA PATENT FIRM
Priority Data
2018-22385129.11.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) HYDRAULIC DRIVING APPARATUS
(FR) APPAREIL D'ENTRAÎNEMENT HYDRAULIQUE
(JA) 油圧駆動装置
Abstract
(EN)
A counter balance valve (71L) is positioned between a directional control valve (23) and a hydraulic motor (32L) and is provided between a pair of supplying/discharging tube paths (25A, 25B). In the counter balance valve (71L), a spool (72L) is displaced in an axial direction on the basis of a pressure difference between the supplying/discharging tube paths (25A, 25B). The counter balance valve (71L) includes a communication path (73L) that communicates the supplying/discharging tube paths (25A, 25B), when displacement of the spool (72L) exceeds a predetermined value (XCM) due to the pressure difference between the supplying/discharging tube paths (25A, 25B). The communication path (73L) is provided in the spool (72L) of the counter balance valve (71L).
(FR)
L'invention concerne une soupape d'équilibrage de compteur (71L) positionnée entre une soupape de commande directionnelle (23) et un moteur hydraulique (32L) et disposée entre une paire de trajets de tube d'alimentation/évacuation (25A, 25B). Dans la soupape d'équilibrage de compteur (71L), une bobine (72L) est déplacée dans une direction axiale sur la base d'une différence de pression entre les trajets de tube d'alimentation/évacuation (25A, 25B). La soupape d'équilibrage de compteur (71L) comprend un trajet de communication (73L) qui fait communiquer les trajets de tube d'alimentation/évacuation (25A, 25B), lorsque le déplacement de la bobine (72L) dépasse une valeur prédéfinie (XCM) en raison de la différence de pression entre les trajets de tube d'alimentation/évacuation (25A, 25B). Le trajet de communication (73L) est prévu dans la bobine (72L) de la soupape d'équilibrage de compteur (71L).
(JA)
カウンタバランス弁(71L)は、方向制御弁(23)と油圧モータ(32L)との間に位置して一対の給排管路(25A,25B)の途中に設けられている。カウンタバランス弁(71L)は、給排管路(25A,25B)の圧力差に基づいて、スプール(72L)が軸方向に変位する。カウンタバランス弁(71L)は、給排管路(25A,25B)の間の圧力差によりスプール(72L)の変位が所定量(XCM)を超えると、給排管路(25A,25B)の間を連通する連通路(73L)を備えている。連通路(73L)は、カウンタバランス弁(71L)のスプール(72L)に設けられている。
Also published as
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