-
公开(公告)号：US11440583B2
公开(公告)日：2022-09-13
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.
-
公开(公告)号：US20240104768A1
公开(公告)日：2024-03-28
申请号：US18474552
申请日：2023-09-26
申请人： National Institute of Advanced Industrial Science and Technology , KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
发明人： Nobuyuki KITA , Takuro Kato , Daisuke Okabe , Eiichi Yoshida , Yukikazu Koide , Norihiko Kato , Naoya Yokomachi , Tatsuya Komuro
CPC分类号： G06T7/73 , B66F9/0755 , G06T7/13 , G06T2207/20061 , G06T2207/30252
摘要： An article detection device includes: an image acquiring unit acquiring a surroundings image; a first information image preparing unit preparing a first information image by converting information on a load/unloading target portion of the article to an easily recognizable state based on the surroundings image; a first calculation unit calculating at least one of a position and a posture of the load/unloading target portion; a second information image preparing unit preparing a second information image by converting information on a pitch angle detection portion of the article to an easily recognizable state; and a second calculation unit configured extracting at least two edge candidates for the article extending in a specific direction and included in the second information image based on a calculation result from the first calculation unit and calculating a three-dimensional direction vector indicating a pitch angle of the article from the edge candidates.
-
公开(公告)号：US10465667B2
公开(公告)日：2019-11-05
申请号：US15768125
申请日：2016-09-23
发明人： Tsutomu Matsuo , Naoya Yokomachi , Yuki Ueda , Takashi Uno
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.
-
公开(公告)号：US10358329B2
公开(公告)日：2019-07-23
申请号：US15092161
申请日：2016-04-06
发明人： Yuki Ueda , Naoya Yokomachi , Tsutomu Matsuo , Takashi Uno
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.
-
公开(公告)号：US11053929B2
公开(公告)日：2021-07-06
申请号：US15769853
申请日：2016-09-23
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.
-
公开(公告)号：US10215226B2
公开(公告)日：2019-02-26
申请号：US15750946
申请日：2016-07-28
发明人： Tsutomu Matsuo , Naoya Yokomachi , Yuki Ueda , Takashi Uno
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.
-
公开(公告)号：US10106386B2
公开(公告)日：2018-10-23
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
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.
-
公开(公告)号：US09631613B2
公开(公告)日：2017-04-25
申请号：US14304229
申请日：2014-06-13
发明人： Yuki Ueda , Tsutomo Matsuo , Takashi Uno , Hirohiko Ishikawa , Naoya Yokomachi
CPC分类号： 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
摘要： 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.
-
-
-
-
-
-
-
搜索结果
8 条记录 (耗时 0.017 秒)
