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1. 发明申请

WO1988009280A1 HYDRAULIC STEERING APPARATUS 审中-公开
标题翻译：液压转向装置
公开(公告)号：WO1988009280A1
公开(公告)日：1988-12-01
申请号：PCT/JP1988000509
申请日：1988-05-26
申请人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO , SUKETOMO, Toshitaka , IKARI, Masanori
发明人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO
IPC分类号： B62D05/06
CPC分类号： B62D5/093
摘要： A hydraulic steering apparatus for a construction vehicle, which has been developed for the purpose of improving the steering control performance of an apparatus of this kind by preventing the occurrence of non-synchronousness between a steering wheel and a knuckle arm or some other pivotable member, and eliminating a dead zone ascribed to an operation of a link mechanism. This steering apparatus has a pilot valve (2) connected directly to a steering wheel, a main control valve (7) provided separately from the pilot valve and adapted to be operated by a pressure oil sent from a pilot pump (9) which is controlled by the pilot valve, a steering cylinder (6) to which a pressure oil is supplied from a main pump (8) via the main control valve, and a feedback link (4) connected between a pivotable member (5), such as a knuckle arm connected pivotably to a piston rod in the steering cylinder and a spool in the pilot valve.

2. 发明申请

WO1991019100A1 DEVICE FOR AND METHOD OF CONTROLLING VEHICLE FOR LOADING WORK 审中-公开
标题翻译：用于装载车辆的装置和控制车辆的方法
公开(公告)号：WO1991019100A1
公开(公告)日：1991-12-12
申请号：PCT/JP1991000760
申请日：1991-06-05
申请人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO , KOMATSU MEC KABUSHIKI KAISHA , IKARI, Masanori
发明人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO , KOMATSU MEC KABUSHIKI KAISHA
IPC分类号： F04B49/00
CPC分类号： E02F9/2246
摘要： A device for controlling a vehicle for loading work equipped with a plurality of hydraulic pumps (P1, P2) of a fixed capacity for loading work machine and with a torque converter (TC), in which: an engine (E) equipped with electronic control type governor (10) capable of optionally selecting output characteristics in steps is provided as means for controlling output of the engine; changeover valves (17, 18) for changing over the flow of pressure oil to the drain circuit in response to working oil pressure or electric instruction are disposed in the circuit on the downstream side of one (P1) of a plurality of hydraulic pumps (P1, P2) for the working machine; and a selection switch (15) for output characteristics, a governor controller (11) for controlling engine output characteristic selected by said switch (15), and control circuits (P1, P2, 13, 16, 17, 18) for actuating said changeover valves (17, 18) in response to electric instruction of the selection switch (15) are provided. Accordingly, engine output, hydraulic driving power, and driving power in a plurality of degrees can be set by combining cut-off conditions of the hydraulic pumps in steps in response to a selected engine output, whereby functions of the vehicle can be set according to the work load and work amount.

3. 发明申请

WO1990001588A1 MOVING SPEED REGULATOR FOR HYDRAULICALLY DRIVEN WORKING MACHINES 审中-公开
标题翻译：用于液压驱动机床的移动调速器
公开(公告)号：WO1990001588A1
公开(公告)日：1990-02-22
申请号：PCT/JP1989000798
申请日：1989-08-02
申请人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO , KOMATSU MEC CORP. , IKARI, Masanori
发明人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO , KOMATSU MEC CORP.
IPC分类号： E02F09/22
CPC分类号： E02F9/2203
摘要： A moving speed regulator for hydraulically driven working machines, designed so that it enables a lifting speed of a boom to be controlled automatically, especially, a maximum lifting speed of a boom during an earth and sand scooping operation to be regulated to an optimum level, and a lifting speed of a boom to be reduced when the boom reaches a position close to the highest position. This moving speed regulator is provided with a pilot circuit (10) having a pilot pump (P), a working machine driving hydraulic circuit having a working machine operating valve (g) which is operated by a pilot pressure from a hydraulic pilot valve (i1) installed in the pilot circuit, a pressure regulating valve (12) installed in the pilot circuit, and a change-over valve (11) for switching the pressure regulating valve to an operated state or a non-operated state. A maximum discharge flow rate of the working machine operating valve is controlled by regulating the pressure of the pressure oil in the pilot circuit on the basis of the cooperative effect of the change-over valve and pressure regulating valve.

4. 发明申请

WO1990015270A1 DEVICE FOR CONTROLLING VARIABLE CAPACITY MOTOR OF HYDRAULIC DRIVE VEHICLE 审中-公开
标题翻译：用于控制液压驱动车辆可变能力电机的装置
公开(公告)号：WO1990015270A1
公开(公告)日：1990-12-13
申请号：PCT/JP1990000747
申请日：1990-06-08
申请人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO , KOMATSU MEC KABUSHIKI KAISHA , IKARI, Masanori
发明人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO , KOMATSU MEC KABUSHIKI KAISHA
IPC分类号： F16H61/42
CPC分类号： F16H61/46 , F16H61/423
摘要： A device for controlling the variable capacity motor (2) incorporated in a hydraulic drive vehicle, wherein means (201) for reducing the oil pressure for controlling the motor is provided to pilot hydraulic piping (15) extending from a control pump (3) for controlling the capacity of the motor (2), and changeover valves (202), (203) are provided for performing changeover between operation and non-operation of said pressure reduction means (201). The above structure serves to control the minimum capacity of the variable capacity hydraulic motor while reducing the pressure of pilot oil introduced from the control pump and, when a pressure in the main circuit exceeds a preset value, the changeover valves operate even when the pressure reduction means is in operation so as to cancel such operation for continuously controlling the vehicle.

5. 发明申请

WO1992001869A1 METHOD AND UNIT FOR CONTROLLING VEHICLE FOR LOADING OPERATION 审中-公开
标题翻译：用于控制车辆加载操作的方法和单元
公开(公告)号：WO1992001869A1
公开(公告)日：1992-02-06
申请号：PCT/JP1991000948
申请日：1991-07-16
申请人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO , KOMATSU MEC KABUSHIKI KAISHA , IKARI, Masanori
发明人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO , KOMATSU MEC KABUSHIKI KAISHA
IPC分类号： F04B49/00
CPC分类号： E02F9/2296 , E02F9/2235 , E02F9/2246 , F02D29/04
摘要： A method and a unit for controlling a vehicle for loading operation which carries a variable capacity hydraulic pump (PV) for operating a loading machine and a torque converter (T) for driving itself. The control unit comprises an engine (E) provided with an electronically controlled governor (10) capable of selecting output characteristics stepwise; means (12), (14), (42) and (43) for setting stepwise the maximum capacity and output torque of the variable-capacity hydraulic pump (PV) for operating the loading machine; means (44), (45) for detecting a pump capacity and hydraulic pressure; switches (42), (43) for selecting output characteristics of the engine; a governor controller (11) for controlling to the output characteristics selected by the selecting switches; and a pump controller (41) for selectively setting the maximum capacity and output torque characteristics of the variable-capacity hydraulic pump (PV) in accordance with the engine output characteristics selected by the selecting switches. Accordingly, even if the hydraulic torque fluctuates at the time of high pressure in the variable-capacity hydraulic pump, the fluctuating range of absorption torque of the torque converter can be controlled, thereby enabling to perform earth-sand scoop-up working with ease and efficiently.

6. 发明申请

WO1989011411A1 HYDRAULIC CIRCUIT DEVICE OF CONSTRUCTION VEHICLE 审中-公开
标题翻译：液压电路建筑车辆装置
公开(公告)号：WO1989011411A1
公开(公告)日：1989-11-30
申请号：PCT/JP1989000496
申请日：1989-05-16
申请人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO , KOMATSU MEC CORP. , IKARI, Masanori
发明人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO , KOMATSU MEC CORP.
IPC分类号： B62D05/07
CPC分类号： E02F9/2292 , B62D5/07 , E02F9/2239 , E02F9/2242
摘要： This invention relates to a hydraulic circuit device of a construction vehicle equipped with an excessive pressure oil control circuit (50) in order to reduce a pressure loss when all the operation valves of a work machine are at neutral positions, to reduce power consumption of a hydaulic pump as a whole when a small amount of pressure oil is necessary for a hydraulic circuit of the work machine, to make it possible to effect arbitrarily an unload instruction of the excessive pressure oil and to make it easier to adjust the change of a flow rate at the time of valve switching. This excessive pressure oil control circuit includes a pilot operated unload valve (11) disposed inside an excessive pressure oil supply pipe (51) connected between a hydraulic pump (P1) dedicated to the work machine and a drain pipe (Ct) through a check valve (20) and a pilot pressure change-over valve (12) disposed inside one of pilot pipes (19) for this unload valve.
摘要翻译：本发明涉及一种配备有过压力油控制回路（50）的施工车辆的液压回路装置，以便在作业机械的所有操作阀处于空档位置时减小压力损失，以减少功率消耗当需要少量的压力油作为工作机械的液压回路时，作为整体的氢泵，可以任意地执行过压力油的卸载指令，并且能够更容易地调节流动的变化阀切换时的速率。该过压压力油控制回路包括先导操作的卸载阀（11），其设置在通过专用于作业机械的液压泵（P1）和排出管（Ct）之间的过压供油管（51）内部，通过止回阀（20）和设置在用于该卸载阀的先导管（19）内的先导压力转换阀（12）。

7. 发明申请

WO1988007108A1 OPERATION SPEED CONTROLLER OF CONSTRUCTION MACHINE 审中-公开
标题翻译：施工机械操作速度控制器
公开(公告)号：WO1988007108A1
公开(公告)日：1988-09-22
申请号：PCT/JP1988000292
申请日：1988-03-18
申请人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO , IKARI, Masanori , YAJIMA, Noboru
发明人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO
IPC分类号： E02F33/43
CPC分类号： E02F3/432 , E02F3/433
摘要： A construction machine of the type which has a boom (2) and a bucket (4) as operation members, such as a wheel loader or a showel loader, according to the present invention is provided with an operation speed controller which matches a tilt speed to a boom speed. When a scoop-up operation which repeats alternately the lift of the boom (2) and the tilt of the bucket (4) by the switching operation between the tilt and neutral of only a bucket operation lever (16) by keeping a boom operation lever (15) at a boom kick-out position, the lift speed of the boom (2) is controlled in accordance with the tilt speed of the bucket or with the boom angle so as to match the tilt speed to the boom speed.

8. 发明申请

WO1990013762A1 VARIABLE CAPACITY PUMP CONTROLLER OF HYDRAULICALLY DRIVEN WHEEL 审中-公开
标题翻译：液压驱动轮的可变容量泵控制器
公开(公告)号：WO1990013762A1
公开(公告)日：1990-11-15
申请号：PCT/JP1990000499
申请日：1990-04-17
申请人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO , KOMATSU MEC KABUSHIKI KAISHA , IKARI, Masanori
发明人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO , KOMATSU MEC KABUSHIKI KAISHA
IPC分类号： F16H61/42
CPC分类号： F16H61/433 , F16H61/46 , F16H61/472 , F16H2059/6861
摘要： This invention relates to a variable capacity pump controller for an industrial vehicle such as a shovel loader using a static hydraulic driving system. In a hydraulically driven vehicle equipped with a variable capacity hydraulic pump (P), the controller of the invention includes variable throttle devices (11, 13), (21, 24), (31, 35), (41, 46) which are disposed in pilot hydraulic circuits (10, 12), (20, 22), (30, 32), (40, 42) of a pump capacity control cylinder (C) for controlling the capacity of a variable capacity hydraulic pump (P) and operate in such a manner as to change the operation speed of the pump capacity control cylinder (C) in accordance with the oil pressure of a main hydraulic circuit (S). According to this construction, the variable throttle device operates in such a manner as to open a check valve or a throttle valve in the pilot circuit of the pump capacity control cylinder when the hydraulic driving main circuit is at a high pressure. Therefore, a return hydraulic circuit of the pump control cylinder is expanded to speed up the reducing speed of the pump capacity and to prevent an excessive torque to an engine.

9. 发明申请

WO1989006723A1 BUCKET POSTURE RETAINER FOR CARGO HANDLING VEHICLES 审中-公开
标题翻译：用于货物处理车辆的BUCKET POSTURE保持器
公开(公告)号：WO1989006723A1
公开(公告)日：1989-07-27
申请号：PCT/JP1989000036
申请日：1989-01-18
申请人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO , IKARI, Masanori , FUKUDA, Masao
发明人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO
IPC分类号： E02F03/43
CPC分类号： E02F3/433
摘要： In a cargo handling vehicle provided with a boom and a bucket, such as a shovel loader or a wheel loader, the agreement of an actual angle of the bucket with respect to the ground surface with a preset angle is detected after the starting of an automatic pivotal movement thereof, and the moment this agreement has been detected, the automatic pivotal movement of the bucket is stopped. A deviation of the actual angle of the bucket with respect to the ground surface from the preset angle is thereafter determined, and the angle of the bucket is corrected so that this deviation becomes zero. Accordingly, even when the boom is turned after the bucket is stopped, the bucket is retained at the preset angle.

10. 发明申请

WO1990005254A1 APPARATUS FOR CONTROLLING VARIABLE-CAPACITY HYDRAULIC MOTOR OF A HYDRAULICALLY DRIVEN VEHICLE 审中-公开
标题翻译：用于控制液压驱动车辆的可变容量液压马达的装置
公开(公告)号：WO1990005254A1
公开(公告)日：1990-05-17
申请号：PCT/JP1989001147
申请日：1989-11-08
申请人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO , KOMATSU MEC CORP. , IKARI, Masanori
发明人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO , KOMATSU MEC CORP.
IPC分类号： F16H39/48
CPC分类号： F16H61/47 , F16H61/423 , F16H61/46
摘要： An apparatus for controlling variable-capacity motor of a hydraulically driven vehicle capable of continuously controlling a maximum speed of the vehicle without deteriorating running performance which is characteristic to the hydraulically driven vehicles with a continuously variable transmission. The apparatus for controlling the variable-capacity hydraulic motor is characterized by the provision of a vehicle speed cut-off device (122) which works to limit a minimum capacity of the motor (2) in response to a hydraulic pressure on the high-pressure side of main circuits (24, 25) connecting a hydraulic pump (1) to the variable-capacity hydraulic motor (2) and to a pilot pressure from a control pump (3) that acts on a motor capacity control cylinder (31) that controls the motor (2).

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