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公开(公告)号：US11214941B2
公开(公告)日：2022-01-04
申请号：US17253187
申请日：2019-03-28
发明人： Teppei Saitoh , Kenji Hiraku , Mitsuo Aihara
摘要： It is an object of the present invention to provide a construction machine having a good engine starting property in a low temperature environment.
The construction machine of the present invention includes: an electric pump having a delivery port connected to a line part of a pilot line, the line part connecting a pilot pump with a pilot control valve; a motor that drives the electric pump; and a temperature sensor that measures a temperature of a hydraulic working fluid delivered from the pilot pump. A controller starts driving of the motor in the case where a key switch is operated from a key OFF state to a key ON state and where the temperature of the hydraulic working fluid measured by the temperature sensor is lower than a predetermined temperature.-
42.发明授权公开(公告)号：US11199856B2
公开(公告)日：2021-12-14
申请号：US16334964
申请日：2017-08-01
发明人： Seiya Katou , Takeshi Ito , Hiroshi Watanabe
摘要： The safe operation assistance device 200 includes: a connecting destination detecting section 259 that detects and manages a connection state between the safe operation assistance device 200 and a connecting destination device; a unique information setting section 251 that sets unique information identifying a vehicle type of an own vehicle according to the connecting destination device; a positional information acquisition section 257 that acquires positional information of the own vehicle; an own vehicle information management section 252 that manages the positional information and the unique information of the own vehicle; an inter-vehicle communication section 255 that transmits the own vehicle information to other vehicle and acquires other vehicle information; and a risk determination section 254 that determines presence or absence of a collision risk between the own vehicle and the other vehicle using the own vehicle information and the other vehicle information.
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公开(公告)号：US11193254B2
公开(公告)日：2021-12-07
申请号：US17255934
申请日：2019-09-03
IPC分类号： E02F9/22 , E02F3/43 , F15B11/028 , F15B11/042 , F15B11/044 , F15B11/05 , F15B11/16
摘要： To provide a construction machine that can highly precisely control branch flows from a hydraulic pump to a plurality of hydraulic actuators without being affected by load conditions. A controller (100) has a meter-out valve control section (140) configured to calculate a target opening area of a second meter-out valve (65a) (65b) according to a pressure difference between a supply pressure and a second meter-in pressure, or calculate a target opening area of a first meter-out valve (55a) (55b) according to a pressure difference between the supply pressure and the first meter-in pressure.
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公开(公告)号：US11180900B2
公开(公告)日：2021-11-23
申请号：US16081744
申请日：2017-03-31
发明人： Daisuke Watanabe
摘要： A pedal operation switching mechanism can switch a foot pedal to any movement pattern of three movement patterns of a front/rear step pattern of being capable of the operation of depressing a front side of the foot pedal from a neutral position of a rotational part of a pilot valve and of being capable of the operation of depressing a rear side of the foot pedal from the neutral position of the rotational part, a front step limit pattern of being capable of the operation of depressing only the front side of the foot pedal from the neutral position of the rotational part, and a fixing pattern of fixing the movement of the foot pedal in the neutral position of the rotational part.
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公开(公告)号：US20210355655A1
公开(公告)日：2021-11-18
申请号：US17274211
申请日：2019-11-27
摘要： This invention provides a work vehicle in which operating switches are easy to operate even in a situation where the vehicle is shaken. In a wheel loader 1 including a working device 2 and a cab 3, wherein the cab 3 is provided with a driver's seat 51, a pair of front pillars 331L, 331R, an operating lever 54 for operating the working device 2, and a switchbox 55 having an operating surface 550 in which multiple operating switches S are arranged, the operating lever 54 is placed between a right front pillar 331R and the driver's seat 51, the switchbox 55 is installed to the right front pillar 331R with its long side direction being along the pillar extension direction, the operating surface 550 is oriented toward a direction along an imaginary line IL that passes through the center in its short side direction and extends perpendicular to the surface, the imaginary line intersecting a backrest of the driver's seat 51 and a center line C with respect to the left and right direction of the cab 3, and one side of the switchbox 55 in a short side direction has a guide 553 formed to overhang out along its long side direction.
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公开(公告)号：US11173890B2
公开(公告)日：2021-11-16
申请号：US16490986
申请日：2018-02-23
摘要： To provide a power regeneration system for a working vehicle that can effectively use a regenerative electric energy.
A first electric circuit for supplying an electric power generated by the first generator to a traveling motor, a voltage detector for detecting an actual voltage of the first electric circuit, a second electric circuit for supplying an electric power generated by a second generator to an auxiliary device, a step-down device connected to the first electric circuit and the second electric circuit, and a controller are provided. The controller estimates the voltage of the first electric circuit after a predetermined time has elapsed from the present time, based on information on a traveling state of a work vehicle and the actual voltage detected by the voltage detector, and outputs a drive command to the step-down device when the estimated voltage is equal to or more than a threshold.-
公开(公告)号：US20210348362A1
公开(公告)日：2021-11-11
申请号：US17272694
申请日：2020-01-15
发明人： Shinji NISHIKAWA , Ryousuke ITOU , Katsuaki KODAKA
摘要： There is provided a construction machine that draws attention from the surroundings of the machine body when the prime mover is started and that can have the operator reliably confirm the surroundings of the machine body before the prime mover is started. An engine start control section 23 of a main controller 22 inhibits an engine 18 from starting when a key switch 12 is operated while a horn switch 21 is not operated, inhibits the engine 18 from starting when the key switch 12 is operated for the duration until a first set time T1 elapses after the operation of the horn switch 21 has been finished, permits the engine 18 to start in a case the key switch 12 is operated for the duration until a second set time T2 elapses after the first set time T1 has elapsed, and inhibits the engine 18 again from starting when the key switch 12 is operated if the engine 18 is not started for the duration until the second set time T2 elapses.
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公开(公告)号：US20210332563A1
公开(公告)日：2021-10-28
申请号：US17289365
申请日：2019-12-13
发明人： Akira KANAZAWA , Hidekazu MORIKI , Takaaki CHIBA , Shinya IMURA
摘要： A construction machine is provided that can cause each hydraulic actuator to accurately operate according to operation by an operator in combined operation in which a hydraulic fluid of a hydraulic pump is subjected to flow dividing and is supplied to plural hydraulic actuators. A controller 10, in a case of determining that combined operation is being carried out, controls a regulator 7a in such a manner that the delivery flow rate of a hydraulic pump 7 becomes larger than the total target flow rate of plural hydraulic actuators 4a, 5a, and 6a, and controls the respective opening amounts of plural directional control valves 8a1, 8a3, and 8a5 in such a manner that the difference between the respective target flow rates of the plural hydraulic actuators and the respective inflow flow rates of the plural hydraulic actuators sensed by velocity sensors 12 to 14 becomes small.
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公开(公告)号：US20210317637A1
公开(公告)日：2021-10-14
申请号：US17271743
申请日：2019-12-25
发明人： Tetsuji TANAKA , Masaki NUKII , Keisuke NAITOU
IPC分类号： E02F9/22
摘要： Provided is a wheel loader capable of automatically decreasing vehicle speed without making an operator feel discomfort during a loading operation. A wheel loader 1 mounted with a torque converter type traveling drive system comprises a controller 5 configured to control shifting of a transmission 32. When a vehicle body travels forward at vehicle speed corresponding to a second speed stage set greater by one speed stage than the lowest speed stage of the transmission 32 while operating the lift arm 21 upwardly, the controller 5 sets, as a gear ratio of the transmission 32, an intermediate gear ratio between a gear ratio corresponding to the second speed stage and a gear ratio corresponding to a first speed stage, and outputs a signal for selecting a combination of a plurality of gears corresponding to the set gear ratio to each first to fifth solenoid control valves 32A to 32E.
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公开(公告)号：US11142887B2
公开(公告)日：2021-10-12
申请号：US16644288
申请日：2018-07-23
发明人： Akira Watanabe , Ken Takeuchi , Tadashi Osaka
摘要： An engine cooling system (22) includes an engine (11), an engine cooling pipe line (23), an engine water pump (24) and an engine radiator (25). An electricity storage device cooling system (27) includes an electricity storage device (19), an electricity storage device cooling pipe line (28), an electricity storage device water pump (29) and an electricity storage device radiator (31). Different heat-transfer media (engine cooling water and electricity storage device cooling water) flow respectively in the engine cooling system (22) and the electricity storage device cooling system (27). Further, a heating heat exchanger (32) is provided in the halfway of the engine cooling pipe line (23) and in the halfway of the electricity storage device cooling pipe line (28) for performing heat exchange between the engine cooling water and the electricity storage device cooling water.
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