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1. WO2018168277 - CRANE HYDRAULIC CIRCUIT

Publication Number WO/2018/168277
Publication Date 20.09.2018
International Application No. PCT/JP2018/004496
International Filing Date 08.02.2018
IPC
B66C 13/20 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
13Other constructional features or details
18Control systems or devices
20for non-electric drives
B66C 23/82 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
23Cranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes
62Constructional features or details
82Luffing gear
CPC
B66C 13/20
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
13Other constructional features or details
18Control systems or devices
20for non-electric drives
B66C 23/82
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
23Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
62Constructional features or details
82Luffing gear
Applicants
  • 日立住友重機械建機クレーン株式会社 HITACHI SUMITOMO HEAVY INDUSTRIES CONSTRUCTION CRANE CO., LTD. [JP]/[JP]
Inventors
  • 宮崎 格 MIYAZAKI Tadashi
Agents
  • 特許業務法人 武和国際特許事務所 THE PATENT BODY CORPORATE TAKEWA INTERNATIONAL PATENT OFFICE
Priority Data
2017-05278517.03.2017JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) CRANE HYDRAULIC CIRCUIT
(FR) CIRCUIT HYDRAULIQUE DE GRUE
(JA) クレーンの油圧回路
Abstract
(EN) Provided is a crane hydraulic circuit with which operability when a crane is under high load can be improved. This crane hydraulic circuit comprises: a flow dividing valve (30) which is disposed between a first hydraulic pump (1) and a boom-hoisting control valve (15) so as to make the differential pressure across the boom-hoisting control valve constant and divide the pressure oil from the first hydraulic pump to the upstream side and downstream side of the boom-hoisting control valve; and a switching valve (31) which is disposed between the boom-hoisting control valve and a first auxiliary winding control valve (11) and switches the hydraulic circuit between a series circuit for connecting the boom-hoisting control valve and the first auxiliary winding control valve in series with the first hydraulic pump and a parallel circuit for connecting the boom-hoisting control valve and the first auxiliary winding control valve in parallel to the first hydraulic pump.
(FR) L'invention concerne un circuit hydraulique de grue grâce auquel l'aptitude au fonctionnement lorsqu'une grue se trouve dans des conditions de charge élevée peut être améliorée. Ce circuit hydraulique de grue comprend : une soupape distributrice (30) qui est disposée entre une première pompe hydraulique (1) et une soupape de commande de levage de flèche (15) de façon à rendre constante la pression différentielle dans la soupape de commande de levage de flèche et à diviser l'huile sous pression de la première pompe hydraulique au côté amont et au côté aval de la soupape de commande de levage de flèche ; et une soupape de commutation (31) qui est disposée entre la soupape de commande de levage de flèche et une première soupape de commande d'enroulement auxiliaire (11) et commutant le circuit hydraulique entre un circuit en série permettant de lier la soupape de commande de levage de flèche et la première soupape de commande d'enroulement auxiliaire en série avec la première pompe hydraulique et un circuit en parallèle permettant de lier la soupape de commande de levage de flèche et la première soupape de commande d'enroulement auxiliaire en parallèle à la première pompe hydraulique.
(JA) クレーンの高負荷時における操作性を改善できるクレーンの油圧回路を提供する。 第1の油圧ポンプ(1)と起伏用制御弁(15)との間に設けられ、起伏用制御弁の前後差圧を一定にすると共に、第1の油圧ポンプからの圧油を起伏用制御弁の上流側と下流側とに分流する分流弁(30)と、起伏用制御弁と第1の補巻用制御弁(11)との間に設けられ、起伏用制御弁と第1の補巻用制御弁とを第1の油圧ポンプに対してシリーズに接続するシリーズ回路と、起伏用制御弁と第1の補巻用制御弁とを第1の油圧ポンプに対してパラレルに接続するパラレル回路とに油圧回路を切り換える切換弁(31)と、を有するクレーンの油圧回路。
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