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1. WO2022009654 - WORK MACHINE AND METHOD FOR CONTROLLING WORK MACHINE

Publication Number WO/2022/009654
Publication Date 13.01.2022
International Application No. PCT/JP2021/023443
International Filing Date 21.06.2021
IPC
B62D 12/00 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
DMOTOR VEHICLES; TRAILERS
12Steering specially adapted for vehicles operating in tandem or having pivotally connected frames
E02F 9/20 2006.1
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
B62D 5/065 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
DMOTOR VEHICLES; TRAILERS
5Power-assisted or power-driven steering
06fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
065characterised by specially adapted means for varying pressurised fluid supply based on need, e.g. on-demand, variable assist
B62D 5/12 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
DMOTOR VEHICLES; TRAILERS
5Power-assisted or power-driven steering
06fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
10characterised by type of power unit
12Piston and cylinder
Applicants
  • 株式会社小松製作所 KOMATSU LTD. [JP]/[JP]
Inventors
  • 平間 貴大 HIRAMA, Takahiro
  • 林 圭一 HAYASHI, Keiichi
Agents
  • 新樹グローバル・アイピー特許業務法人 SHINJYU GLOBAL IP
Priority Data
2020-11912510.07.2020JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) WORK MACHINE AND METHOD FOR CONTROLLING WORK MACHINE
(FR) ENGIN DE CHANTIER ET PROCÉDÉ DE COMMANDE D'ENGIN DE CHANTIER
(JA) 作業機械、および作業機械の制御方法
Abstract
(EN) In this work machine (1), steering cylinders (9a, 9b) drive a front frame (11) with respect to a rear frame (12). A direction control valve (42) changes the amount of hydraulic oil supplied to the steering cylinders (9a, 9b). A steering wheel (21) operates the direction control valve (42). A variable displacement pump (23) discharges the hydraulic oil to the direction control valve (42). Cylinder stroke sensors (25a, 25b) are provided to detect the rotation angle of the front frame (11) with respect to the rear frame (12). A controller (27) reduces the discharge flow rate of the variable displacement pump (23) on the basis of the detected values of the cylinder stroke sensors (25a, 25b).
(FR) Dans cet engin de chantier (1), des vérins de direction (9a, 9b) entraînent un cadre avant (11) par rapport à un cadre arrière (12). Une soupape de commande de direction (42) modifie la quantité d'huile hydraulique fournie aux vérins de direction (9a, 9b). Un volant de direction (21) actionne la soupape de commande de direction (42). Une pompe à cylindrée variable (23) évacue l'huile hydraulique vers la soupape de commande de direction (42). Des capteurs de course de vérin (25a, 25b) sont prévus pour détecter l'angle de rotation du cadre avant (11) par rapport au cadre arrière (12). Un dispositif de commande (27) réduit le débit d'évacuation de la pompe à cylindrée variable (23) sur la base des valeurs détectées des capteurs de course de vérin (25a, 25b).
(JA) 作業機械(1)では、ステアリングシリンダ(9a、9b)は、リアフレーム(12)に対してフロントフレーム(11)を駆動する。方向制御弁(42)は、ステアリングシリンダ(9a、9b)への作動油の供給量を変更する。ステアリングホイール(21)は、方向制御弁(42)を操作する。可変容量ポンプ(23)は、方向制御弁(42)に作動油を吐出する。シリンダストロークセンサ(25a、25b)は、リアフレーム(12)に対するフロントフレーム(11)の回動角度を検出するために設けられている。コントローラ(27)は、シリンダストロークセンサ(25a、25b)の検出値に基づいて、可変容量ポンプ(23)の吐出流量を減少させる。
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