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公开(公告)号：US20230055738A1
公开(公告)日：2023-02-23
申请号：US17797545
申请日：2021-03-08
申请人： KOMATSU LTD.
发明人： Yuichi NAKANO
摘要： When an inclination angle is greater than or equal to a first threshold, a controller determines a displacement of a hydraulic pump from a command vehicle speed based on second pump data and determines a displacement of a hydraulic motor from the command vehicle speed based on second motor data. The second pump data defines the displacement of the hydraulic pump that is smaller than that of first pump data with respect to the command vehicle speed. The second motor data defines the displacement of the hydraulic motor that is smaller than that of first motor data with respect to the command vehicle speed.
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公开(公告)号：US11585219B2
公开(公告)日：2023-02-21
申请号：US17268980
申请日：2019-10-30
申请人： Komatsu Ltd.
发明人： Masaaki Uetake , Yuichi Kodama , Kazunari Kawai , Shinichi Terada
摘要： A mining system includes: a first tunnel that reaches a dump site and includes a first road surface; a second tunnel that crosses the first tunnel, reaches a mining site, and includes a second road surface positioned above the first road surface; a frame that includes a lower surface provided above the first road surface of the first tunnel and forming a transport passage between the first road surface and the lower surface and an upper surface forming a work road surface, on which a loading machine operates, together with the second road surface; and a moving vehicle that is capable of traveling on the first road surface and is capable of passing through the transport passage.
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公开(公告)号：US20230036958A1
公开(公告)日：2023-02-02
申请号：US17768544
申请日：2020-11-05
申请人： Komatsu Ltd.
发明人： Akira TANISHIGE , Junki IRIE , Daiki ARIMATSU , Koichi SHIMA
摘要： A display control system includes a GNSS reception unit configured to receive position information from a GNSS controller, a display signal generation unit configured to generate a signal for displaying guidance information of a work machine based on the position information, a power signal reception unit configured to receive a power-off signal, and a shutdown processing unit configured to perform a shutdown process after a predetermined time has elapsed from receiving the power-off signal.
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公开(公告)号：US20230036534A1
公开(公告)日：2023-02-02
申请号：US17789296
申请日：2021-01-25
申请人： Komatsu Ltd.
发明人： Masanori Minagawa
摘要： A remote operation system for a work machine includes, at a remote place of the work machine: an image data reception unit that receives a first image in a first imaging range and a second image in a second imaging range at least partially overlapping the first imaging range; and a display control unit that causes a display device to display the first image and the second image including an object whose state changes in an overlapping range between the first imaging range and the second imaging range.
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公开(公告)号：US20230026073A1
公开(公告)日：2023-01-26
申请号：US17788016
申请日：2021-01-07
申请人： KOMATSU LTD.
发明人： Manabu NAKAMURA , Masaya KATOU
IPC分类号： G01M3/16 , F16H57/029
摘要： An oil leak detection device includes a pair of permanent magnets, a plurality of commutators, a coil, a pair of brushes, and a current sensor. An N-pole and an S-pole of the pair of permanent magnets face each other. The plurality of commutators are attached to an output shaft. The coil is wound onto the output shaft inside the pair of permanent magnets in the radial direction of the output shaft. The coil is electrically connected to the plurality of commutators. The pair of brushes are attached to a housing and are capable of coming into contact with each of the plurality of commutators. The current sensor detects an induction current flowing between the pair of brushes and the housing.
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公开(公告)号：US20230022248A1
公开(公告)日：2023-01-26
申请号：US17788077
申请日：2020-12-09
申请人： Komatsu Ltd.
发明人： Yuuji Shibata , Yusuke Fujii
摘要： A control system for a work machine includes a plurality of hydraulic pumps that discharge hydraulic oil, a hydraulic cylinder that moves a working equipment element, a plurality of flow rate control valves that are respectively connected to the hydraulic pumps and adjust a flow rate of the hydraulic oil supplied to the hydraulic cylinder, a plurality of supply flow paths respectively connected to the of flow rate control valves, a meter-in flow path that connects a collective part of the supply flow paths and an inlet of the hydraulic oil in the hydraulic cylinder, a plurality of discharge flow paths respectively connected to the flow rate control valves, a meter-out flow path that connects a collective part of the discharge flow paths and an outlet of the hydraulic oil in the hydraulic cylinder, and a throttle disposed in the meter-out flow path.
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公开(公告)号：US20230021713A1
公开(公告)日：2023-01-26
申请号：US17778714
申请日：2020-12-04
申请人： Komatsu Ltd.
IPC分类号： F03C1/34 , F04B1/2042 , F04B53/16 , F04B1/2021 , F03C1/06 , F03C1/32
摘要： A hydraulic pump/motor includes: a cylinder block rotating about a rotation axis; a piston in a cylinder bore; and a valve plate facing a cylinder port. The valve plate includes: a high pressure port through which hydraulic oil discharged from the cylinder port flows; a low pressure port through which the oil to be sucked into the cylinder port flows; a region disposed between the high and low pressure ports in a circumferential direction of the rotation axis and including a top dead center position facing the cylinder port of the cylinder bore in which the piston moved to a top dead center is disposed; and a residual pressure release port between the top dead center position and the low pressure port in the region. The residual pressure release port includes first and second ports disposed at a positions different from each other in the radial direction of the rotation axis.
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98.发明申请公开(公告)号：US20230018377A1
公开(公告)日：2023-01-19
申请号：US17781481
申请日：2021-01-07
申请人： KOMATSU LTD.
发明人： Jun MATSUMOTO , Yuuki KOBAYASHI
摘要： A camera captures an image of a region including at least a portion of an operating member and generates image data indicative of the image. A controller acquires the image data from the camera. The controller determines whether an operation of the operating member by an operator is an intentional operation or an unintentional operation based on the image. When the operation of the operating member by the operator is determined to be the intentional operation, the controller controls a work machine according to the operation of the operating member. When the operation of the operating member by the operator is determined to be the unintentional operation, the controller invalidates the operation of the operating member.
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公开(公告)号：US20220410694A1
公开(公告)日：2022-12-29
申请号：US17777195
申请日：2020-10-29
申请人： Komatsu Ltd.
发明人： Masahiro Ikeda , Kazuya Imamura , Takaaki Mizokami , Naotsuna Matsuda , Takeshi Nakagawa , Naoya Ando
摘要： A work machine includes: a partition member provided with an intake port and an exhaust port and forming an engine room; an engine disposed in the engine room; a cooling fan disposed on an intake port side of the engine in the engine room; an exhaust pipe discharging exhaust gas from the engine; and an exhaust duct disposed in the engine room and having an inflow port into which air from the cooling fan flows, and an outflow port. At least a portion of the exhaust duct is disposed above the engine and has a facing surface facing the engine and a through-hole provided in the facing surface. At least a portion of the exhaust pipe is disposed in the through-hole. A gap is formed between an outer surface of the exhaust pipe and an inner surface of the through-hole.
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公开(公告)号：US20220403617A1
公开(公告)日：2022-12-22
申请号：US17779453
申请日：2020-11-25
申请人： KOMATSU LTD.
发明人： Toru MATSUYAMA
摘要： A distance calculation unit calculates a bucket distance that is a distance between a point on a bucket and a target design surface representing a target shape of an excavation target. An intervention control unit calculates an intervention control amount to suppress a speed of work equipment such that the bucket does not intrude on the target design surface based on the bucket distance. An attachment control unit calculates an attachment control amount to rotate the bucket around an attachment axis such that an edge of the bucket and the target design surface approach each other in a parallel state. An attachment limiting unit limits rotation of the bucket around the attachment axis such that the bucket distance is not increased by a movement of the work equipment based on the intervention control amount and the attachment control amount.
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