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公开(公告)号：EP3159550A4
公开(公告)日：2018-02-28
申请号：EP15811218
申请日：2015-06-10
发明人： TAKAHASHI KIWAMU , MORI KAZUSHIGE , ITO MASAMICHI , TAKEBAYASHI YOSHIFUMI , NAKAMURA NATSUKI , OKAZAKI YASUHARU , YAMADA KENJI
CPC分类号： E02F9/2062 , E02F3/325 , E02F3/964 , E02F9/2225 , E02F9/2228 , E02F9/2232 , E02F9/2235 , E02F9/2285 , E02F9/2296 , F15B11/162 , F15B11/165 , F15B13/024 , F15B13/06 , F15B2211/20507 , F15B2211/20546 , F15B2211/20553 , F15B2211/30535 , F15B2211/40576 , F15B2211/50518 , F15B2211/513 , F15B2211/5151 , F15B2211/55 , F15B2211/6051 , F15B2211/6055 , F15B2211/7135
摘要： In a hydraulic driving system for construction machines, when track motors 3f and 3g are operated and the delivery pressure of a main pump 2 increases to a second value PS2 of the set pressure of a main relief valve 14, the set pressure of a signal pressure relief valve 16 increases from a third value PA1 to a fourth value PA2, which is smaller than the second value PS2 of the set pressure of the main relief valve 14, the difference between the second value PS2 and the fourth value PA2 being smaller than the target LS differential pressure. With such a structure, even if one of actuators reaches the stroke end and the delivery pressure of the hydraulic pump rises to the set pressure of the main relief valve, the other actuators do not stop, and further when the main relief valve is configured to increase the set pressure during operation of a specific actuator, the load pressure of the specific actuator does not increase to the increased set pressure of the main relief valve.
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公开(公告)号：EP3112695A4
公开(公告)日：2017-12-27
申请号：EP14882008
申请日：2014-11-26
发明人： TAKAHASHI KIWAMU , TSURUGA YASUTAKA , MORI KAZUSHIGE , TAKEBAYASHI YOSHIFUMI , NAKAMURA NATSUKI , OKAZAKI YASUHARU , YAMADA KENJI
CPC分类号： F15B13/06 , E02F3/325 , E02F9/2235 , E02F9/2267 , E02F9/2292 , E02F9/2296 , F15B11/161 , F15B11/17 , F15B2211/20507 , F15B2211/20523 , F15B2211/20546 , F15B2211/20553 , F15B2211/20576 , F15B2211/253 , F15B2211/255 , F15B2211/2656 , F15B2211/50554 , F15B2211/6355 , F15B2211/67
摘要： The object is to make it possible to efficiently utilize rated output torque of the prime mover by performing total torque control with high precision through precise detection of absorption torque of the other hydraulic pump by use of a purely hydraulic structure and feedback of the absorption torque to the one hydraulic pump's side. For this purpose, the hydraulic drive system is equipped with: a torque feedback circuit 112v which is supplied with delivery pressure of a main pump 202 and load sensing drive pressure, modifies the delivery pressure of the main pump 202 to achieve a characteristic simulating the absorption torque of the main pump 202, and outputs the modified pressure; and a torque feedback piston 112f which is supplied with output pressure of the torque feedback circuit and controls displacement of a main pump 102 so as to decrease the displacement of the main pump 102 and thereby decrease maximum torque T12max as the output pressure increases. The torque feedback circuit 112v includes first and second variable pressure reducing valves 112g and 112q.
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公开(公告)号：EP2662576A4
公开(公告)日：2018-01-10
申请号：EP12732178
申请日：2012-01-05
CPC分类号： E02F9/2267 , E02F3/325 , E02F3/964 , E02F9/02 , E02F9/2225 , E02F9/2228 , E02F9/2232 , E02F9/2235 , E02F9/2271 , E02F9/2285 , E02F9/2292 , E02F9/2296 , E02F9/267 , F04B17/03 , F15B11/163 , F15B11/165 , F15B13/026 , F15B19/002 , F15B2211/20523 , F15B2211/20546 , F15B2211/20553 , F15B2211/30535 , F15B2211/3111 , F15B2211/3116 , F15B2211/323 , F15B2211/355 , F15B2211/522 , F15B2211/528 , F15B2211/5756 , F15B2211/6054 , F15B2211/7058 , F15B2211/7135 , F15B2211/782
摘要： A hydraulic drive system for a working machine including a track device of crawler type is provided. The track device of crawler type travels with hydraulic fluid supplied from at least one hydraulic pump to right and left track motors. The hydraulic drive system is capable of easily correcting skew traveling for straight line traveling without having to replace a track motor or other large-size device and without having to specially modify a main circuit. A traveling test is conducted upon shipment from a factory. If skew is noted during the test, a plug 65b disposed on the side of a valve opening-side pressure receiving portion 28b (or 28d) of a pressure compensating valve 27b (or 27d) for track whichever is lower in speed is removed and, instead, an adjusting mechanism-mounted plug 37 is mounted. An adjusting pin 37b of the adjusting mechanism-mounted plug 37 is operated so as to strengthen a biasing force of a target compensating differential pressure adjusting spring 36b. An opening in the pressure compensating valve 27b (or 27d) is thereby corrected in an opening direction and a flow rate to a left track motor 6 (or 8) is thereby adjusted to be equal to that of a right track motor 8 (or 6).
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4.发明公开HYDRAULICALLY DRIVEN SYSTEM FOR CONSTRUCTION MACHINE 审中-公开HYDRAULIKANTRIEBSSYSTEMFÜREINE BAUMASCHINE
公开(公告)号：EP2578890A4
公开(公告)日：2017-08-02
申请号：EP11786393
申请日：2011-03-09
CPC分类号： E02F9/2232 , E02F9/2285 , E02F9/2296 , F15B11/163 , F15B2211/253 , F15B2211/30535 , F15B2211/6355 , F15B2211/71 , F15B2211/7135
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公开(公告)号：EP3121453A4
公开(公告)日：2018-01-17
申请号：EP14886607
申请日：2014-12-02
CPC分类号： E02F9/2271 , E02F3/325 , E02F3/425 , E02F3/964 , E02F9/2235 , E02F9/2239 , E02F9/2267 , E02F9/2282 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B11/163 , F15B11/165 , F15B11/17 , F15B13/06 , F15B2211/20546 , F15B2211/20576 , F15B2211/255 , F15B2211/30565 , F15B2211/3111 , F15B2211/3116
摘要： An object to achieve favorable operability, in a combined operation that involves a specific actuator and involves a great difference in load pressure and when an operation of an operating unit for the specific actuator is a fine operation, by reducing energy consumption arising from wasted restricting pressure loss of a pressure compensating valve and by flexibly varying a flow rate of a hydraulic fluid supplied to the specific actuator depending on the load pressure. To achieve this object, a boom cylinder (3a) is provided with an open center type flow control valve (6a) that controls a hydraulic fluid from a main pump (202) and a closed center type flow control valve (6i) that controls a hydraulic fluid from a main pump (102). The main pump (102) is subject to load sensing control. The flow control valve (6a) is opened to control a supply flow rate up to an intermediate zone of an operating range of an operating unit for the boom cylinder (3a). Both the flow control valves (6a) and (6i) are opened to control the supply flow rate after the intermediate zone.
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6.发明公开HYDRAULIC DRIVE DEVICE FOR CONSTRUCTION MACHINE 审中-公开HYDRAULISCHE ANTRIEBSVORRICHTUNGFÜREINE BAUMASCHINE
公开(公告)号：EP3076026A4
公开(公告)日：2017-08-02
申请号：EP14865196
申请日：2014-11-26
发明人： TAKAHASHI KIWAMU , TSURUGA YASUTAKA , TAKEBAYASHI YOSHIFUMI , MORI KAZUSHIGE , NAKAMURA NATSUKI , OKAZAKI YASUHARU , NOBEZAWA HIROYUKI , YAMADA KENJI
IPC分类号： F15B11/02 , E02F3/32 , E02F3/96 , E02F9/20 , E02F9/22 , F15B11/00 , F15B11/16 , F15B11/17 , F15B13/02 , F15B13/06 , F15B20/00
CPC分类号： F15B11/165 , E02F3/325 , E02F3/964 , E02F9/2066 , E02F9/2228 , E02F9/2235 , E02F9/2267 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B13/026 , F15B13/06 , F15B20/007 , F15B2211/20523 , F15B2211/20546 , F15B2211/20553 , F15B2211/20576 , F15B2211/6652 , F15B2211/6655
摘要： The object is to make it possible to efficiently utilize rated output torque of the prime mover by performing total torque control with high precision through precise detection of absorption torque of the other hydraulic pump by use of a purely hydraulic structure and feedback of the absorption torque to one hydraulic pump's side. For this purpose, the hydraulic drive system is equipped with: a torque feedback circuit 112v which is supplied with delivery pressure of a main pump 202 and load sensing drive pressure, modifies the delivery pressure of the main pump 202 to achieve a characteristic simulating the absorption torque of the main pump 202, and outputs the modified pressure; and a torque feedback piston 112f which is supplied with an output pressure of the torque feedback circuit and controls displacement of a main pump 102 so as to decrease the displacement of the main pump 102 and thereby decrease maximum torque T12max as the output pressure increases.
摘要翻译： 本发明的目的是通过利用纯粹的液压结构精确检测另一液压泵的吸收转矩并将吸收转矩反馈到以下方式，以高精度进行总转矩控制，从而有效地利用原动机的额定输出转矩： 一个液压泵的一侧。 为此，液压驱动系统配备有：被供应有主泵202的输送压力和负载传感驱动压力的转矩反馈回路112v，改变主泵202的输送压力以实现模拟吸收的特性 主泵202的转矩，输出修正后的压力; 以及转矩反馈活塞112f，该转矩反馈活塞112f被供给转矩反馈回路的输出压力，并控制主泵102的排量，从而减小主泵102的排量，从而随着输出压力增加而减小最大转矩T12max。
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7.发明公开HYDRAULIC DRIVE SYSTEM ADAPTED FOR USE IN CONSTRUCTION MACHINE AND PROVIDED WITH EXHAUST GAS PURIFICATION DEVICE 审中-公开HYDRAULISCHES ANTRIEBSSYSTEM麻省理工学院ABGASREINIGUNGSVORRICHTUNG ZUR VERWENDUNG在EINER BAUMASCHINE
公开(公告)号：EP2636906A4
公开(公告)日：2017-07-26
申请号：EP11837948
申请日：2011-10-28
CPC分类号： F01N9/002 , E02F9/2235 , E02F9/2285 , E02F9/2296 , F01N3/023 , F01N2590/08 , F02D29/04 , F04B49/002 , F15B11/165 , F15B2211/20523 , F15B2211/20553 , F15B2211/6057 , F15B2211/6058 , F15B2211/633 , F15B2211/653 , F15B2211/665 , F15B2211/6652 , F15B2211/6658
摘要： A hydraulic drive system executing the load sensing control is designed to be capable of efficiently combusting and removing filter deposits inside an exhaust gas purification device (42) by pump output power increasing control when there is no actuator operation, eliminating interference between the actuator operation and the pump output power increasing control even when they are performed at the same time, and achieving these effects with ease and at a low cost. The hydraulic drive system comprises: a solenoid selector valve (46) which selects between tank pressure and delivery pressure of a pilot pump (30) upstream of an engine revolution speed detecting valve (13) and outputs the selected pressure to a shuttle valve (45) ; and a solenoid selector valve (48) which is arranged in a line (12b) leading the output pressure of a differential pressure reducing valve (11) to an LS control valve (17b) and selects between enabling and disabling of the load sensing control. When the exhaust gas purification device (42) needs regeneration, a controller (49) executes switching to make the solenoid selector valve (46) output the delivery pressure of the pilot pump (30) as dummy load pressure and to make the solenoid selector valve (48) disable the load sensing control.
摘要翻译： 执行负载传感控制的液压驱动系统被设计成能够在没有执行器操作时通过泵输出功率增大控制有效地燃烧和去除排气净化装置（42）内的过滤器沉积物，消除执行器操作与 即使在同时执行泵输出功率增加控制，并且容易且低成本地实现这些效果。 该液压驱动装置具备：电磁切换阀（46），其在发动机转速检测阀（13）的上游侧的先导泵（30）的油箱压力与排出压力之间进行选择，并将该选择出的压力向梭阀 ）; 以及布置在将差压减压阀（11）的输出压力引导至LS控制阀（17b）的线路（12b）中并且在负载感测控制的启用和禁用之间进行选择的电磁切换阀（48）。 当排气净化装置（42）需要再生时，控制器（49）执行切换，以使电磁切换阀（46）输出先导泵（30）的排出压力作为模拟负载压力，并且使电磁切换阀 （48）禁用负载传感控制。
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