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1. 发明授权

US11440583B2 Hydraulic drive device for industrial vehicle 有权
公开(公告)号：US11440583B2
公开(公告)日：2022-09-13
申请号：US16759495
申请日：2018-10-05
申请人： KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
发明人： Takashi Uno , Naoya Yokomachi , Yuki Ueda , Tsutomu Matsuo
IPC分类号： F16D31/00 , F15B13/00 , F15B11/00 , B62D5/065 , B62D5/07 , B62D5/08 , B66F9/22
摘要： A hydraulic drive device for an industrial vehicle includes a variable displacement pump, a displacement control valve, a power steering cylinder, a power steering valve, a loading cylinder, a loading valve, a hydraulic oil passage, and a pilot line. The displacement control valve controls the variable displacement pump to increase displacement of the variable displacement pump when differential pressure between discharge pressure of hydraulic oil discharged from the variable displacement pump and pilot pressure generated in the pilot line is smaller than a predetermined set pressure. A spool of the loading valve is provided with a groove portion that forms a communication passage that makes communication between the hydraulic oil passage and the pilot line at a neutral position of the loading valve when the power steering valve is located in a neutral position.

2. 发明申请

US20150013324A1 FORKLIFT HYDRAULIC CONTROL APPARATUS 有权
标题翻译：叉车液压控制装置
公开(公告)号：US20150013324A1
公开(公告)日：2015-01-15
申请号：US14375580
申请日：2013-01-16
申请人： KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
发明人： Tsutomu Matsuo , Hirohiko Ishikawa , Yuki Ueda , Tetsuya Goto , Junichi Morita
IPC分类号： B66F9/22 , F15B13/02
CPC分类号： B66F9/22 , F15B11/02 , F15B13/02 , F15B21/14 , F15B2211/20569 , F15B2211/6336 , F15B2211/761 , F15B2211/88
摘要： 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.
摘要翻译：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。

3. 发明授权

US10358329B2 Hydraulic control device of forklift truck 有权
公开(公告)号：US10358329B2
公开(公告)日：2019-07-23
申请号：US15092161
申请日：2016-04-06
申请人： KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
发明人： Yuki Ueda , Naoya Yokomachi , Tsutomu Matsuo , Takashi Uno
IPC分类号： B66F9/22 , F15B11/16
摘要： A hydraulic control device of a forklift truck includes a first hydraulic cylinder, a first instructing member, a second hydraulic cylinder, a second instructing member, a hydraulic pump, an electric motor, a first oil passage, a lowering control valve, a second oil passage that is branched from the first oil passage at a junction, a flow control valve, a first pilot passage through which pressure in the first oil passage at a position between the first hydraulic cylinder and the lowering control valve is applied to a first accommodating chamber of the flow control valve as the pressure upstream of the lowering control valve, and a second pilot passage through which pressure in the first oil passage at a position between the lowering control valve and the hydraulic pump is applied to a second accommodating chamber of the flow control valve as the pressure downstream of the lowering control valve.

4. 发明授权

US09957982B2 Lifting device 有权
公开(公告)号：US09957982B2
公开(公告)日：2018-05-01
申请号：US14436263
申请日：2012-10-18
申请人： KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
发明人： Yuki Ueda , Tsutomu Matsuo , Hirohiko Ishikawa
IPC分类号： F15B11/04 , B66F9/22
CPC分类号： F15B11/0413 , B66F9/22 , F15B2211/20569 , F15B2211/30505 , F15B2211/30515 , F15B2211/3057 , F15B2211/353 , F15B2211/355 , F15B2211/46 , F15B2211/473 , F15B2211/7052 , F15B2211/8606
摘要： 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.

5. 发明授权

US10465667B2 Variable displacement pump 有权
公开(公告)号：US10465667B2
公开(公告)日：2019-11-05
申请号：US15768125
申请日：2016-09-23
申请人： KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
发明人： Tsutomu Matsuo , Naoya Yokomachi , Yuki Ueda , Takashi Uno
IPC分类号： F04B1/32 , F04B1/20 , F04B53/22 , F04B53/16
摘要： Provided is a variable displacement pump which includes a cylinder block including a plurality of cylinder bores formed in a rotation shaft in a circumferential direction and rotating together with the rotation shaft, a piston provided inside each of the plurality of cylinder bores to be slidable, and a swash plate supported to be tiltable with respect to the rotation shaft while a distal end portion of the piston is slidable thereon and which sucks and discharges a working fluid by moving the piston in a reciprocating manner with a stroke in accordance with an inclination angle of the swash plate, the variable displacement pump including: a control piston which includes a piston portion pressing the swash plate and controls the inclination angle of the swash plate; a piston accommodation portion which is formed in the housing and accommodates the piston portion; and a hollow cylindrical guide portion which is disposed between the piston accommodation portion and the piston portion and includes an inner peripheral surface supporting the piston portion to be slidable thereon, in which the housing is formed of a material having higher fatigue strength than the guide portion and the guide portion is formed of a material harder than the housing.

6. 发明授权

US10059575B2 Hydraulic control device for forklift 有权
公开(公告)号：US10059575B2
公开(公告)日：2018-08-28
申请号：US14769836
申请日：2014-02-12
申请人： KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
发明人： Yuki Ueda , Tsutomu Matsuo , Takashi Uno , Hirohiko Ishikawa
IPC分类号： B66F9/22
CPC分类号： B66F9/22
摘要： 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.

7. 发明授权

US09771250B2 Hydraulic control device for forklift 有权
公开(公告)号：US09771250B2
公开(公告)日：2017-09-26
申请号：US14368410
申请日：2012-12-10
申请人： KABUSHIKI KAISHA TOYOTA JIDOSHOKKI , NISHINA INDUSTRIAL CO., LTD.
发明人： Yuki Ueda , Tsutomu Matsuo , Hirohiko Ishikawa , Tetsuya Goto , Junichi Morita , Toshinari Fukatsu , Akira Nakajo , Ryo Yazawa
IPC分类号： B66F9/22 , F15B11/044 , E02F9/22 , F15B11/042
CPC分类号： B66F9/22 , E02F9/2246 , F15B11/0423 , F15B11/044 , F15B2211/20515 , F15B2211/20561 , F15B2211/40515 , F15B2211/41581 , F15B2211/428 , F15B2211/45 , F15B2211/7052 , F15B2211/761
摘要： 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.

8. 发明授权

US09469515B2 Forklift hydraulic control apparatus 有权
标题翻译：叉车液压控制装置
公开(公告)号：US09469515B2
公开(公告)日：2016-10-18
申请号：US14375580
申请日：2013-01-16
申请人： KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
发明人： Tsutomu Matsuo , Hirohiko Ishikawa , Yuki Ueda , Tetsuya Goto , Junichi Morita
IPC分类号： B66F9/22 , F15B21/14 , F15B11/02 , F15B13/02
CPC分类号： B66F9/22 , F15B11/02 , F15B13/02 , F15B21/14 , F15B2211/20569 , F15B2211/6336 , F15B2211/761 , F15B2211/88
摘要： 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.
摘要翻译：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。

9. 发明申请

US20140331662A1 HYDRAULIC CONTROL DEVICE FOR FORKLIFT 有权
标题翻译：液压控制装置
公开(公告)号：US20140331662A1
公开(公告)日：2014-11-13
申请号：US14368410
申请日：2012-12-10
申请人： KABUSHIKI KAISHA TOYOTA JIDOSHOKKI , NISHINA INDUSTRIAL CO., LTD.
发明人： Yuki Ueda , Tsutomu Matsuo , Hirohiko Ishikawa , Tetsuya Goto , Junichi Morita , Toshinari Fukatsu , Akira Nakajo , Ryo Yazawa
IPC分类号： B66F9/22 , F15B11/042 , E02F9/22
CPC分类号： B66F9/22 , E02F9/2246 , F15B11/0423 , F15B11/044 , F15B2211/20515 , F15B2211/20561 , F15B2211/40515 , F15B2211/41581 , F15B2211/428 , F15B2211/45 , F15B2211/7052 , F15B2211/761
摘要： 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.
摘要翻译：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。

10. 发明授权

US11053929B2 Variable displacement pump 有权
公开(公告)号：US11053929B2
公开(公告)日：2021-07-06
申请号：US15769853
申请日：2016-09-23
申请人： KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
发明人： Tsutomu Matsuo , Naoya Yokomachi , Yuki Ueda , Takashi Uno
IPC分类号： F04B1/324 , F04B1/22 , F04B1/2035 , F04B1/2085 , F04B1/2078 , F04B49/00 , F04B1/34
摘要： Provided is a variable displacement pump which sucks and discharges a working fluid by moving a piston with a stroke in response to an inclination angle of a swash plate, the variable displacement pump including: a control piston which includes a columnar piston portion pressing the swash plate and adjusts the inclination angle of the swash plate between a maximal inclination angle in which a discharge capacity of the working fluid becomes maximal and a minimal inclination angle in which the discharge capacity of the working fluid becomes minimal; a piston accommodation portion which is formed in the housing and accommodates the piston portion; and a pressed portion which is disposed between the swash plate and the piston portion and is pressed toward the swash plate by the piston portion, in which when the inclination angle of the swash plate is an intermediate inclination angle in which the discharge capacity of the working fluid becomes an intermediate amount between the maximal amount and the minimal amount, a contact point between the piston portion and the pressed portion is located at a center portion including an axis center of the piston portion in an end surface on the side of the swash plate in the piston portion.

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