Processing

Please wait...

Settings

Settings

1. WO2000043601 - HYDRAULIC DRIVING DEVICE OF CIVIL ENGINEERING AND CONSTRUCTION MACHINERY

Publication Number WO/2000/043601
Publication Date 27.07.2000
International Application No. PCT/JP2000/000201
International Filing Date 18.01.2000
Chapter 2 Demand Filed 30.06.2000
IPC
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 9/2239
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
2221Control of flow rate; Load sensing arrangements
2239using two or more pumps with cross-assistance
E02F 9/2242
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
2221Control of flow rate; Load sensing arrangements
2239using two or more pumps with cross-assistance
2242including an electronic controller
E02F 9/2267
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
2264Arrangements or adaptations of elements for hydraulic drives
2267Valves or distributors
E02F 9/2271
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
2264Arrangements or adaptations of elements for hydraulic drives
2271Actuators and supports therefor and protection therefor
E02F 9/2292
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
2278Hydraulic circuits
2292Systems with two or more pumps
Applicants
  • HITACHI CONSTRUCTION MACHINERY CO., LTD. [JP/JP]; 5-1, Koraku 2-chome Bunkyo-ku Tokyo 112-0004, JP (AllExceptUS)
  • TOYOOKA, Tsukasa [JP/JP]; JP (UsOnly)
  • HIRATA, Toichi [JP/JP]; JP (UsOnly)
  • SUGIYAMA, Genroku [JP/JP]; JP (UsOnly)
  • ISHIKAWA, Kouji [JP/JP]; JP (UsOnly)
  • NISHIMURA, Masao [JP/JP]; JP (UsOnly)
  • NAKAMURA, Tsuyoshi [JP/JP]; JP (UsOnly)
Inventors
  • TOYOOKA, Tsukasa; JP
  • HIRATA, Toichi; JP
  • SUGIYAMA, Genroku; JP
  • ISHIKAWA, Kouji; JP
  • NISHIMURA, Masao; JP
  • NAKAMURA, Tsuyoshi; JP
Agents
  • TAKE, Kenjiro; Kashiwaya Building 6-13, Nishishinbashi 1-chome Minato-ku Tokyo 105-0003, JP
Priority Data
11/1083319.01.1999JP
11/29263714.10.1999JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) HYDRAULIC DRIVING DEVICE OF CIVIL ENGINEERING AND CONSTRUCTION MACHINERY
(FR) DISPOSITIF D'ENTRAINEMENT HYDRAULIQUE POUR ENGINS DE TERRASSEMENT ET DE GENIE CIVIL
Abstract
(EN)
A hydraulic driving device of civil engineering and construction machinery, comprising hydraulic pumps (1, 2), a switching valve group (15a) which is connected to the pump (1) and includes a bypass stop valve (7), a switching valve group (15b) which is connected to the pump (2) and includes a preliminary directional control valve (11), a communication pipe line (13) establishing communication of the upstream-most side of the switching valve group (15a) with the supply pipe line (11a) of the preliminary directional control valve (11), a merge switching valve (14) allowing the communication pipe line (13) to communicate or shut off, an interlocked operation means switching the merge switching valve (14) to open position and the bypass stop valve (7) to closed position in conjuction with the switching operation of the preliminary directional control valve (11), and a selective switching valve (28) switching between the states where the switching operation of the merge switching valve (14) is enabled and disabled by the interlocked operation means, wherein the switching valve groups (15a, 15b), communication pipe line (13), and merge switching valve (14) are installed in a housing (15) so that a change in the maximum value of the operating speed of an actuator controlled by the preliminary directional control valve can be achieved.
(FR)
L'invention concerne un dispositif d'entraînement hydraulique pour engins de terrassement et de génie civil, qui comporte des pompes hydrauliques (1, 2), un groupe de soupapes de commutation (15b) reliées à la pompe (1) et comportant une soupape d'arrêt de dérivation (7), un groupe de soupapes de commutation (15b) relié à la pompe (2) et comportant un distributeur (11), une conduite de communication (13) faisant communiquer le côté le plus en amont du groupe de soupapes de commutation (15a) avec la conduite d'alimentation du distributeur préliminaire (11), une soupape de commutation de fusion (14) permettant l'ouverture ou la fermeture de la conduite de communication (13), un moyen de commande verrouillé faisant passer la soupape de commutation de fusion (14) en position ouverte et la soupape d'arrêt de dérivation (7) en position fermée conjointement à la commande du distributeur préliminaire (11), et une soupape de commutation sélective (28) qui permet au moyen de commande verrouillé d'activer ou de désactiver la soupape de commutation de fusion (14). Les groupes de soupapes de commutation (15a, 15b), la conduite de communication (13) et la soupape de commutation de fusion (14) sont installés dans un logement (15) de manière à obtenir une vitesse maximale de commande d'actionneur sous la commande du distributeur préliminaire.
Latest bibliographic data on file with the International Bureau