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公开(公告)号：US20160002017A1
公开(公告)日：2016-01-07
申请号：US14769836
申请日：2014-02-12
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.
摘要翻译： 一种用于叉车的液压控制装置，包括：多个液压机构，包括升降液压缸和倾斜液压缸; 液压泵; 电动马达 排放控制机构; 比例阀; 流量控制阀; 和控制器。 当升降液压缸执行叉的降低操作时，除了升降液压缸以外的液压机构同时进行进一步的动作，所以控制器根据转速差来控制比例阀的开度 需要按照与升降控制部件的运转量对应的指示速度进行下降动作所需要的液压泵的下降动作转速以及液压泵所需的另外的运转转速 ，这是执行进一步操作所必需的。
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公开(公告)号：US20180231055A1
公开(公告)日：2018-08-16
申请号：US15750946
申请日：2016-07-28
发明人： Tsutomu MATSUO , Naoya YOKOMACHI , Yuki UEDA , Takashi UNO
CPC分类号： F16C19/364 , F04B1/2085 , F16C19/547 , F16C25/083 , F16C2360/42
摘要： A hydraulic pump having a rotary shaft rotatably supported with respect to a casing, the hydraulic pump including: a bearing part provided to one end side and the other end side of the rotary shaft; and a first annular member provided around the rotary shaft on at least one side of the one end side and the other end side of the rotary shaft. The bearing part on the one side has a support part which rotatably supports the rotary shaft, and a preload applying member which applies a preload in the axial direction to the support part. The first annular member is interposed between the bearing part of the one side and a receiving part of the rotary shaft in the axial direction, and an inner diameter of the first annular member is larger than a diameter of the rotary shaft.
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公开(公告)号：US20170211556A1
公开(公告)日：2017-07-27
申请号：US15326094
申请日：2015-07-02
发明人： Yuki UEDA , Naoya YOKOMACHI , Tsutomu MATSUO , Takashi UNO
IPC分类号： F04B1/32
CPC分类号： F04B1/324 , F04B1/2007 , F04B1/2078 , F04B1/32
摘要： A variable capacity piston pump including a control piston pressing a pressed portion of a swashplate from a cylinder block side to adjust an inclination of the swashplate between a maximum inclination and a minimum inclination, and a swashplate return spring biasing the pressed portion of the swashplate toward the cylinder block side of the sliding contact surface, wherein there is a positional relationship in which a vertical reference line passes between a first seat surface center position of the swashplate return spring when the swashplate is at the maximum inclination and a second seat surface center position of the swashplate return spring when the swashplate is at the minimum inclination.
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公开(公告)号：US20190032645A1
公开(公告)日：2019-01-31
申请号：US16069205
申请日：2016-12-19
发明人： Tsutomu MATSUO , Naoya YOKOMACHI , Yuki UEDA , Takashi UNO
摘要： A variable displacement swash plate type piston pump includes first and second housing members fastened to each other by fastening members, a rotary shaft, a swash plate. A section of the inner circumferential surface of the first housing member has a recess. A bulging portion is arranged in a section of the outer circumferential wall of the first housing member. A section of the outer circumferential wall of the second housing member has a closing portion that closes the opening of the recess. The fastening members include first and second fastening members arranged at positions that are on the opposite sides of the recess, inside the width of the swash plate in a direction along the inclination axis of the swash plate, and closer to the rotary shaft than the distal ends of the bulging portion and the closing portion in the bulging direction.
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公开(公告)号：US20190003494A1
公开(公告)日：2019-01-03
申请号：US15752775
申请日：2016-08-18
发明人： Yuki UEDA , Naoya YOKOMACHI , Tsutomu MATSUO , Takashi UNO , Tetsuya GOTO , Takanori KANNA
IPC分类号： F15B11/024 , F15B21/14 , F15B11/16 , F15B11/04
摘要： In a hydraulic driving device for a cargo handling vehicle, a power running torque limit value setting unit sets a power running torque limit value to a minimum rotation speed set in advance, in a case where a determination unit determines that operations of second hydraulic cylinders including a lowering operation of a first operating portion are simultaneously performed, a rotation speed command value setting unit sets a rotation speed command value to a maximum value from between a lowering required rotation speed based on an operation amount of the first operating portion and a second hydraulic cylinder required rotation speed based on operation amounts of the second operating portions, and the power running torque limit value setting unit sets the power running torque limit value to the second hydraulic cylinder required rotation speed based on the operation amounts of the second operating portions, and a control unit controls an electric motor to rotate at a rotation speed based on the rotation speed command value and controls the electric motor to rotate at a rotation speed based on the power running torque limit value in a case where an output torque of the electric motor shifts toward a power running side.
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公开(公告)号：US20180328350A1
公开(公告)日：2018-11-15
申请号：US15769853
申请日：2016-09-23
发明人： Tsutomu MATSUO , Naoya YOKOMACHI , Yuki UEDA , Takashi UNO
CPC分类号： F04B1/324 , F04B1/2035 , F04B1/2078 , F04B1/2085 , F04B1/22 , 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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公开(公告)号：US20200283061A1
公开(公告)日：2020-09-10
申请号：US16759495
申请日：2018-10-05
发明人： Takashi UNO , Naoya YOKOMACHI , Yuki UEDA , Tsutomu MATSUO
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.
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公开(公告)号：US20180306171A1
公开(公告)日：2018-10-25
申请号：US15768125
申请日：2016-09-23
发明人： Tsutomu MATSUO , Naoya YOKOMACHI , Yuki UEDA , Takashi UNO
CPC分类号： F04B1/324 , F04B1/2064 , F04B1/2078 , F04B53/168 , F04B53/22
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.
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公开(公告)号：US20160332854A1
公开(公告)日：2016-11-17
申请号：US15152012
申请日：2016-05-11
发明人： Yuki UEDA , Naoya YOKOMACHI , Tsutomu MATSUO , Takashi UNO , Tetsuya GOTO , Takanori KANNA
CPC分类号： B66F9/22 , B66F9/205 , F15B11/161 , F15B13/021 , F15B13/06 , F15B2211/20515 , F15B2211/40576
摘要： A hydraulic control device of a forklift truck includes a first hydraulic cylinder, a first instruction member, a second hydraulic cylinder, a second instruction member, a hydraulic pump, an electric motor, a first passage which has a drain passage, a lowering control valve that controls flow of hydraulic oil, a flow rate control valve, and a controller. When a lowering operation of forks and an operation of a hydraulically-operated unit are performed simultaneously, when a required rotation speed of the hydraulic pump that is required for operating the hydraulically-operated unit at an instruction speed based on an operation of the second instruction member is a specified rotation speed or lower, the controller controls an instruction rotation speed of the electric motor so as to operate the hydraulic pump at the required rotation speed to thereby restrict the operation of the hydraulic pump.
摘要翻译： 叉车的液压控制装置包括第一液压缸，第一指令构件，第二液压缸，第二指令构件，液压泵，电动马达，具有排水通道的第一通道，下降控制阀 其控制液压油的流动，流量控制阀和控制器。 当同时执行叉的下降操作和液压操作单元的操作时，当以基于第二指令的操作的指令速度操作液压操作单元所需的液压泵所需的转速 构件是指定的转速或更低的速度，控制器控制电动机的指令转速，以便以所需的转速操作液压泵，从而限制液压泵的操作。
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公开(公告)号：US20170211555A1
公开(公告)日：2017-07-27
申请号：US15326061
申请日：2015-07-02
发明人： Yuki UEDA , Naoya YOKOMACHI , Tsutomu MATSUO , Takashi UNO
CPC分类号： F04B1/295 , F04B1/2078 , F04B1/32 , F04B1/324
摘要： A variable capacity piston pump including a piston portion of the control piston causing a pressing force to act along one direction by pressing a pressed portion of a swashplate from a cylinder block side to adjust an inclination of the swashplate between a maximum inclination and a minimum inclination, and a swashplate return spring biasing the pressed portion of the swashplate toward the cylinder block side of the sliding contact surface, wherein there is a positional relationship in which a vertical reference line passes between a first action position which is an action position of the pressing force when the inclination of the swashplate is the maximum inclination and a second action position which is an action position of the pressing force when the inclination of the swashplate is the minimum inclination.
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