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1.发明公开HYDRAULIC DRIVE DEVICE FOR CONSTRUCTION MACHINE 审中-公开HYDRAULISCHE ANTRIEBSVORRICHTUNGFÜREINE BAUMASCHINE
公开(公告)号：EP3076027A4
公开(公告)日：2017-08-02
申请号：EP14866109
申请日：2014-11-26
CPC分类号： E02F9/2235 , E02F3/325 , E02F9/2228 , E02F9/2232 , E02F9/2267 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B13/025 , F15B13/026 , F15B13/0803 , F15B20/007 , F15B2211/20523 , F15B2211/20546 , F15B2211/20553 , F15B2211/20576 , F15B2211/25 , F15B2211/6652 , F15B2211/6655
摘要： It is an object of the present invention to accurately detect the absorption torque of the other of two hydraulic pumps by a purely hydraulic structure and feed the absorption torque to one of the two hydraulic pumps, thereby to accurately perform a total torque control, effectively utilize a rated output torque of a prime mover, and enhance mountability. To achieve the object, there are provided: a torque feedback circuit 31 to which the delivery pressure of a first hydraulic pump 1a and a load sensing drive pressure are introduced, which modifies the delivery pressure of a second hydraulic pump 1b to provide a characteristic simulating the absorption torque of the second hydraulic pump 1b, and which outputs the modified pressure; and torque feedback pistons 32a, 32b to which the output pressure of the torque feedback circuit 31 is introduced, and which control the capacity of the first hydraulic pump 1a to decrease the capacity of the first hydraulic pump 1a and decrease a maximum torque T1max as the output pressure becomes higher. The torque feedback circuit 31 includes pressure dividing restrictor parts 34a, 34b, pressure dividing valves 35a, 35b, and relief valves 37a, 37b.
摘要翻译： 本发明的目的是通过纯液压结构精确地检测两个液压泵中的另一个液压泵的吸收转矩，并将吸收转矩提供给两个液压泵中的一个，由此精确地执行总转矩控制，从而有效地利用 原动机的额定输出转矩，提高搭载性。 为了实现该目的，提供了：扭矩反馈回路31，第一液压泵1a的输送压力和负载感测驱动压力被引入该扭矩反馈回路31，其改变第二液压泵1b的输送压力以提供特性模拟 第二液压泵1b的吸收扭矩，并输出修正后的压力; 以及转矩反馈回路31的输出压力被导入的转矩反馈活塞32a，32b，其控制第一液压泵1a的容量，以减小第一液压泵1a的容量，并减小最大转矩T1max， 输出压力变高。 转矩反馈回路31具有分压限制部34a，34b，分压阀35a，35b，溢流阀37a，37b。
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2.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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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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