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公开(公告)号：US09957982B2
公开(公告)日：2018-05-01
申请号：US14436263
申请日：2012-10-18
Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
Inventor： Yuki Ueda , Tsutomu Matsuo , Hirohiko Ishikawa
CPC classification number: F15B11/0413 , B66F9/22 , F15B2211/20569 , F15B2211/30505 , F15B2211/30515 , F15B2211/3057 , F15B2211/353 , F15B2211/355 , F15B2211/46 , F15B2211/473 , F15B2211/7052 , F15B2211/8606
Abstract: An electromagnetic switching valve, for which the maximum opening is set to be small, is disposed on piping between a lift cylinder and a hydraulic pump motor. A pilot check valve, for which the maximum opening is set to be larger than the electromagnetic switching valve, is disposed on piping, different from the piping, between the lift cylinder and the hydraulic pump motor. In addition, during lowering operations, first, the electromagnetic switching valve is opened, and then after the same is opened, the pilot check valve is opened after a prescribed time has passed. Thus, the shock generated when lowering an object to be raised/lowered is reduced and a fork is operated quickly.
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公开(公告)号：US20150013324A1
公开(公告)日：2015-01-15
申请号：US14375580
申请日：2013-01-16
Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
Inventor： Tsutomu Matsuo , Hirohiko Ishikawa , Yuki Ueda , Tetsuya Goto , Junichi Morita
CPC classification number: B66F9/22 , F15B11/02 , F15B13/02 , F15B21/14 , F15B2211/20569 , F15B2211/6336 , F15B2211/761 , F15B2211/88
Abstract: An outlet port of a hydraulic pump/motor and a bottom chamber of a lift cylinder are connected to each other by a hydraulic fluid passage. A hydraulic fluid passage that is connected to a hydraulic fluid tank is formed to branch off the hydraulic fluid passage. A flow control valve controls the hydraulic fluid delivered from the lift cylinder when the fork is lowered, thereby regulating the flow rate of hydraulic fluid supplied to the hydraulic pump/motor and the flow rate of hydraulic fluid supplied to the hydraulic fluid tank. If regenerative operation can be performed, the flow control valve is closed and hydraulic fluid is delivered to the hydraulic pump/motor. If regenerative operation cannot be performed, the flow control valve is opened and hydraulic fluid is delivered to the hydraulic fluid tank. In either case, the fork can be lowered at an instructed speed.
Abstract translation: 液压泵/马达的出口和提升缸的底部腔室通过液压流体通道相互连接。 连接到液压油箱的液压流体通道形成为从液压流体通道分支。 当叉子下降时，流量控制阀控制从提升缸输送的液压流体，从而调节供给到液压泵/马达的液压流体的流量和供给到液压油箱的液压流体的流量。 如果可以进行再生运转，则流量控制阀关闭，液压油被输送到液压泵/马达。 如果无法进行再生运转，则流量控制阀打开，液压油输送到液压油箱。 在任一情况下，可以以指示的速度降低叉。
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公开(公告)号：US09631613B2
公开(公告)日：2017-04-25
申请号：US14304229
申请日：2014-06-13
Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
Inventor： Yuki Ueda , Tsutomo Matsuo , Takashi Uno , Hirohiko Ishikawa , Naoya Yokomachi
CPC classification number: F04B35/045 , B60L1/003 , B60L1/20 , B60L2200/42 , B60L2240/36 , B66F9/22 , F15B21/14 , F15B2211/20515 , F15B2211/20538 , F15B2211/20569 , F15B2211/30595 , F15B2211/40569 , F15B2211/41572 , F15B2211/4159 , F15B2211/50536 , F15B2211/7142 , F15B2211/88
Abstract: A hydraulic drive device for cargo handling vehicle has: a tank; a pump for drawing in a hydraulic oil from the tank and supplying the hydraulic oil to hydraulic cylinders; an electric motor for driving the pump; a solenoid-controlled proportional valve disposed between an inlet port of the pump and a bottom chamber of an up-and-down hydraulic cylinder and configured to open with a valve travel depending upon a control input of a descent control of an up-and-down control member; a pressure compensation valve disposed between a branch portion located between the pump and the solenoid-controlled proportional valve and the tank and configured to open with a valve travel depending upon a pressure difference between pressures upstream and downstream of the solenoid-controlled proportional valve; and a valve disposed between the pressure compensation valve and the tank and configured to be switched between an open position and a close position.
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Patent Agency Ranking
公开(公告)号：US20150300380A1
公开(公告)日：2015-10-22
申请号：US14436263
申请日：2012-10-18
Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
Inventor： Yuki Ueda , Tsutomu Matsuo , Hirohiko Ishikawa
CPC classification number: F15B11/0413 , B66F9/22 , F15B2211/20569 , F15B2211/30505 , F15B2211/30515 , F15B2211/3057 , F15B2211/353 , F15B2211/355 , F15B2211/46 , F15B2211/473 , F15B2211/7052 , F15B2211/8606
Abstract: An electromagnetic switching valve, for which the maximum opening is set to be small, is disposed on piping between a lift cylinder and a hydraulic pump motor. A pilot check valve, for which the maximum opening is set to be larger than the electromagnetic switching valve, is disposed on piping, different from the piping, between the lift cylinder and the hydraulic pump motor. In addition, during lowering operations, first, the electromagnetic switching valve is opened, and then after the same is opened, the pilot check valve is opened after a prescribed time has passed. Thus, the shock generated when lowering an object to be raised/lowered is reduced and a fork is operated quickly.
Abstract translation: 将最大开度设定得较小的电磁切换阀设置在提升缸和液压泵马达之间的配管上。 将最大开度设定为大于电磁切换阀的先导止回阀设置在与提升缸和液压泵马达之间的配管不同的配管上。 此外，在下降动作中，首先，电磁切换阀打开，然后在打开之后，经过规定时间后，先导止回阀打开。 因此，降低降低物体时产生的冲击减少，叉子快速操作。
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公开(公告)号：US10059575B2
公开(公告)日：2018-08-28
申请号：US14769836
申请日：2014-02-12
Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
Inventor： Yuki Ueda , Tsutomu Matsuo , Takashi Uno , Hirohiko Ishikawa
IPC: B66F9/22
CPC classification number: B66F9/22
Abstract: A hydraulic control device for a forklift includes: a plurality of hydraulic mechanisms including a lifting/lowering hydraulic cylinder and a tilting hydraulic cylinder; a hydraulic pump; an electric motor; a discharge control mechanism; a proportional valve; a flow rate control valve; and a controller. When the lifting/lowering hydraulic cylinder performs a lowering operation of the fork and a hydraulic mechanism other than the lifting/lowering hydraulic cylinder simultaneously performs a further operation, the controller controls an open degree of the proportional valve in accordance with a rotation speed difference of a required lowering operation rotation speed for the hydraulic pump, which is required to perform the lowering operation at an instructed speed that is in accordance with an operation amount of the lifting/lowering control member, and a required further operation rotation speed for the hydraulic pump, which is required to perform the further operation.
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公开(公告)号：US09771250B2
公开(公告)日：2017-09-26
申请号：US14368410
申请日：2012-12-10
Inventor： Yuki Ueda , Tsutomu Matsuo , Hirohiko Ishikawa , Tetsuya Goto , Junichi Morita , Toshinari Fukatsu , Akira Nakajo , Ryo Yazawa
IPC: B66F9/22 , F15B11/044 , E02F9/22 , F15B11/042
CPC classification number: B66F9/22 , E02F9/2246 , F15B11/0423 , F15B11/044 , F15B2211/20515 , F15B2211/20561 , F15B2211/40515 , F15B2211/41581 , F15B2211/428 , F15B2211/45 , F15B2211/7052 , F15B2211/761
Abstract: A hydraulic control device for a forklift includes a hydraulic pump, a single electric motor for driving the hydraulic pump, an outflow control mechanism provided between a lift cylinder and the hydraulic pump, a flow control valve provided between the outflow control mechanism and a draining portion, and a controller. When a lowering operation of a fork and either forward or rearward mast tilting operations of a mast are performed at the same time, the controller controls the electric motor based on a target speed of the hydraulic pump. The flow control valve controls the flow rate of hydraulic fluid from the lift cylinder to the hydraulic pump and the flow rate from the lift cylinder to the draining portion in accordance with the difference between the actual rotation speed of the hydraulic pump and the target rotation speed of the hydraulic pump.
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公开(公告)号：US09469515B2
公开(公告)日：2016-10-18
申请号：US14375580
申请日：2013-01-16
Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
Inventor： Tsutomu Matsuo , Hirohiko Ishikawa , Yuki Ueda , Tetsuya Goto , Junichi Morita
CPC classification number: B66F9/22 , F15B11/02 , F15B13/02 , F15B21/14 , F15B2211/20569 , F15B2211/6336 , F15B2211/761 , F15B2211/88
Abstract: An outlet port of a hydraulic pump/motor and a bottom chamber of a lift cylinder are connected to each other by a hydraulic fluid passage. A hydraulic fluid passage that is connected to a hydraulic fluid tank is formed to branch off the hydraulic fluid passage. A flow control valve controls the hydraulic fluid delivered from the lift cylinder when the fork is lowered, thereby regulating the flow rate of hydraulic fluid supplied to the hydraulic pump/motor and the flow rate of hydraulic fluid supplied to the hydraulic fluid tank. If regenerative operation can be performed, the flow control valve is closed and hydraulic fluid is delivered to the hydraulic pump/motor. If regenerative operation cannot be performed, the flow control valve is opened and hydraulic fluid is delivered to the hydraulic fluid tank. In either case, the fork can be lowered at an instructed speed.
Abstract translation: 液压泵/马达的出口和提升缸的底部腔室通过液压流体通道相互连接。 连接到液压油箱的液压流体通道形成为从液压流体通道分支。 当叉子下降时，流量控制阀控制从提升缸输送的液压流体，从而调节供给到液压泵/马达的液压流体的流量和供给到液压油箱的液压流体的流量。 如果可以进行再生运转，则流量控制阀关闭，液压油被输送到液压泵/马达。 如果无法进行再生运转，则流量控制阀打开，液压油输送到液压油箱。 在任一情况下，可以以指示的速度降低叉。
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公开(公告)号：US20140331662A1
公开(公告)日：2014-11-13
申请号：US14368410
申请日：2012-12-10
Inventor： Yuki Ueda , Tsutomu Matsuo , Hirohiko Ishikawa , Tetsuya Goto , Junichi Morita , Toshinari Fukatsu , Akira Nakajo , Ryo Yazawa
IPC: B66F9/22 , F15B11/042 , E02F9/22
CPC classification number: B66F9/22 , E02F9/2246 , F15B11/0423 , F15B11/044 , F15B2211/20515 , F15B2211/20561 , F15B2211/40515 , F15B2211/41581 , F15B2211/428 , F15B2211/45 , F15B2211/7052 , F15B2211/761
Abstract: A hydraulic control device for a forklift includes a hydraulic pump, a single electric motor for driving the hydraulic pump, an outflow control mechanism provided between a lift cylinder and the hydraulic pump, a flow control valve provided between the outflow control mechanism and a draining portion, and a controller. When a lowering operation of a fork and either forward or rearward mast tilting operations of a mast are performed at the same time, the controller controls the electric motor based on a target speed of the hydraulic pump. The flow control valve controls the flow rate of hydraulic fluid from the lift cylinder to the hydraulic pump and the flow rate from the lift cylinder to the draining portion in accordance with the difference between the actual rotation speed of the hydraulic pump and the target rotation speed of the hydraulic pump.
Abstract translation: 一种用于铲车的液压控制装置包括液压泵，用于驱动液压泵的单个电动机，设置在提升缸和液压泵之间的流出控制机构，设置在流出控制机构和排出部分之间的流量控制阀 ，和控制器。 当叉子的下降操作和桅杆的前后倾斜操作同时进行时，控制器基于液压泵的目标速度来控制电动机。 流量控制阀根据液压泵的实际转速与目标转速之间的差异来控制从提升缸到液压泵的液压流体的流量以及从提升缸到排出部的流量 的液压泵。
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