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公开(公告)号：EP4083334A1
公开(公告)日：2022-11-02
申请号：EP20905996.3
申请日：2020-12-24
Applicant: KUBOTA CORPORATION
Inventor： HORII, Hiroshi
IPC: E02F3/43
Abstract: A working machine (1) capable of bringing a distal end portion of a working tool into the vicinity of or into contact with a blade (7A) of a dozer (7) is provided.
A working machine includes a machine body (2), a dozer (7), a boom (31), an arm (41), a working tool (51), a boom cylinder (32), and an arm cylinder (42). The working machine also includes an arm crowd restricting unit (64) and a crowd restriction releasing unit (65). The arm crowd restricting unit (64) imposes a restriction on a stroke (S1) of the arm cylinder (42) in an arm crowd direction (D1) so that a swing track (M3) of a distal end portion of the working tool is spaced from the boom cylinder (32). The crowd restriction releasing unit (65) releases the restriction on the stroke (S1) of the arm cylinder (42) to enable the arm (41) to swing to an end of a swing range in the arm crowd direction (D1) when the boom (31) is at a swing position at which the working tool (51) in an operating position close to a working-tool dump position (Y2) is disposed in a vicinity of a blade (7A).
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公开(公告)号：EP3184827B1
公开(公告)日：2018-08-29
申请号：EP16204950.6
申请日：2016-12-19
Applicant: KUBOTA CORPORATION
Inventor： HORII, Hiroshi
CPC classification number: F15B11/16 , E02F3/32 , E02F3/425 , E02F3/964 , E02F9/123 , E02F9/22 , E02F9/2225 , E02F9/2296 , F15B11/162 , F15B11/163 , F15B2211/20553 , F15B2211/30555 , F15B2211/3111 , F15B2211/35 , F15B2211/605 , F15B2211/7052 , F15B2211/7058 , F15B2211/71 , F15B2211/7135 , F15B2211/7142 , F15B2211/78 , F15B2211/781
Abstract: A hydraulic system for a work machine includes a first hydraulic actuator, a second hydraulic actuator, a hydraulic pump to discharge an operation fluid, a first control valve serving as a control valve to control the first hydraulic actuator, the first control valve including a first direction switch to switch the operation fluid and a pressure compensator to maintain a differential pressure to a constant pressure, the differential pressure being generated between a pressure of the operation fluid inputted and a pressure of the operation fluid to be outputted. And, the hydraulic system includes a second control valve serving as another control valve to control the second hydraulic actuator, the second control valve including a second direction switch to switch the operation fluid and a flow rate prioritizer to prioritize a flow rate of the operation fluid that is to be outputted to the second hydraulic actuator.
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公开(公告)号：EP4459051A1
公开(公告)日：2024-11-06
申请号：EP22915895.1
申请日：2022-12-22
Applicant: KUBOTA CORPORATION
Inventor： HORII, Hiroshi
IPC: E02F9/22 , F15B11/00 , F15B11/042
Abstract: Provided is a working machine (1) capable of improving responsiveness of a hydraulic actuator when a predetermined operation is performed.
The working machine (1) includes a machine body (2), working devices (a working device 4 and a dozer device 7) mounted on the machine body (2), hydraulic actuators (C5, C3, C4, C1) that drive the working devices, control valves (V1, V2, V7, V3, V6) that switch the state of a hydraulic fluid supplied to the hydraulic actuators, operation members (41) that receive operation instructions for the hydraulic actuators, and a controller (U1) that controls actuation of the control valves in response to operations performed on the operation members (41). The controller (U1) is capable of performing second control for controlling the actuation of each of the control valves on the basis of the amount of an operation performed on a corresponding one of the operation members (41) and the correspondence between a preset operation amount for the operation member (41) and the actuation amount of the control valve and first control for controlling, in accordance with the amount of the operation performed on the operation member (41), the actuation of the control valve such that the flow rate of the hydraulic fluid supplied from the control valve to the corresponding hydraulic actuator increases to be greater than that in the second control. The controller (U1) performs the first control when the operation performed on the operation member (41) is in a predetermined operation state.
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公开(公告)号：EP4286599A1
公开(公告)日：2023-12-06
申请号：EP21923307.9
申请日：2021-12-29
Applicant: KUBOTA CORPORATION
Inventor： HORII, Hiroshi , UEDA, Masaaki , NISHIGORI, Yoichi , HATTA, Kazuyuki , SYOBU, Kazuaki
IPC: E02F9/00 , E02F9/16 , B60K15/063
Abstract: In order to provide a working machine that can increase a foot space for an operator, the working machine includes a machine body (2), a cabin (5) on the machine body (2), an air conditioner body (29) for air conditioning in the cabin (5), and a prime mover room (E2) to contain a prime mover (E1) on the machine body (2). The air conditioner body (29) is disposed above the prime mover room (E2).
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公开(公告)号：EP4209860A1
公开(公告)日：2023-07-12
申请号：EP23158932.6
申请日：2018-06-29
Applicant: KUBOTA CORPORATION
Inventor： HORII, Hiroshi , SHOBU, Kazuaki
Abstract: A working machine according to an embodiment of the present invention includes an air cooling system, wherein a cooling airflow flowing between a prime mover (E1) and a ceiling portion (183) of a prime mover room (ER) is mixed with an exhaust gas (203) from the prime mover inside the prime mover room and wherein the mixture is discharged to the outside of the prime mover room through a discharge portion (228).
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公开(公告)号：EP4083337A1
公开(公告)日：2022-11-02
申请号：EP20906822.0
申请日：2020-12-24
Applicant: KUBOTA CORPORATION
Inventor： HORII, Hiroshi
IPC: E02F9/22 , F15B11/00 , F15B11/028 , F15B11/042 , F15B11/05 , F15B11/08
Abstract: To suppress a variation in the actuation speed of a low-load hydraulic actuator (MT) whose hydraulic pressure required for actuation thereof is low. A working machine (1) includes: a plurality of hydraulic actuators; a plurality of direction switching valves that are provided so as to correspond to the plurality of hydraulic actuators, respectively, and each of which switches a direction of a hydraulic fluid for a corresponding one of the hydraulic actuators; and a dummy-load forming unit (97) that forms a dummy load in a low-load direction switching valve (DV8) that switches a direction of hydraulic fluid for a low-load hydraulic actuator (MT) whose hydraulic pressure required for actuation thereof is lower than a hydraulic pressure required for actuation of a high-load hydraulic actuator (C3), the low-load hydraulic actuator (MT) and the high-load hydraulic actuator (C3) being included in the plurality of hydraulic actuators, to suppress a variation in an actuation speed of the low-load hydraulic actuator (MT) between a time when the high-load hydraulic actuator (C3) and the low-load hydraulic actuator (MT) are operated in combination and a time when the low-load hydraulic actuator (MT) is operated singly.
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公开(公告)号：EP4455520A1
公开(公告)日：2024-10-30
申请号：EP22910706.5
申请日：2022-11-21
Applicant: KUBOTA CORPORATION , KYB Corporation
Inventor： HORII, Hiroshi , FUKUDA, Syunsuke
Abstract: To provide a control valve (V) capable of stably removing air.
The control valve (V) includes a valve body (46); a spool hole (47) formed in the valve body (46); a spool (45) slidably fitted in the spool hole (47); a pilot chamber (57) into which a pilot fluid to actuate the spool (45) is led; a discharge passage (51) to discharge a hydraulic fluid to an outside of the valve body (46); a spiral groove (67) to communicate with the discharge passage (51), the spiral groove (67) being formed in a spiral shape on an outer periphery of the spool (45); and at least one axial groove (72) to cause the pilot chamber (57) and the spiral groove (67) to communicate with each other, the axial groove (72) being formed along an axial direction of the spool (45) on an inner surface of the spool hole (47).
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公开(公告)号：EP4286601A1
公开(公告)日：2023-12-06
申请号：EP21923250.1
申请日：2021-12-23
Applicant: KUBOTA CORPORATION
Inventor： HORII, Hiroshi
Abstract: A working machine includes: an operating body switchable between a first position to prevent an operator from getting on/off an operator's seat and a second position (Y2) to allow the operator to get on/off the operator's seat; a plurality of hydraulic actuators whose operation is enabled when the operating body is in the first position and disabled when in the second position; a manipulation member (62) to be manipulated to operate the plurality of hydraulic actuators; and a pattern switching member to be operated switchingly to select one from among a plurality of manipulation patterns of the manipulation member to operate the plurality of hydraulic actuators. When the operating body is in the first position, at least a part of the pattern switching member is covered by the operating body so that the pattern switching member is impossible or difficult to be operated. When the operating body is in the second position, the pattern switching member is exposed to be operable.
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公开(公告)号：EP4286598A1
公开(公告)日：2023-12-06
申请号：EP21923246.9
申请日：2021-12-23
Applicant: KUBOTA CORPORATION
Inventor： HORII, Hiroshi
Abstract: To ease work of transferring a fuel from a fuel supply tank (54) to a fuel tank (T1), a fuel supply guide (55) to be used to supply the fuel by using the fuel supply tank (54) to the fuel tank (T1) having a tank body (T1A) for storing the fuel and a fuel supply port (T1a) on the upper side of the tank body (T1A) includes a support member (56) provided on an upper portion of the fuel tank (T1), and a body member (57) projecting from the support member (56) in a direction away from the fuel supply port (T1a) as the body member extends upward and projecting higher than the fuel supply port (T1a). The body member is capable of receiving the fuel supply tank (T1a) by an upper portion thereof to support the fuel supply tank (T1a).
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公开(公告)号：EP3184827A1
公开(公告)日：2017-06-28
申请号：EP16204950.6
申请日：2016-12-19
Applicant: KUBOTA CORPORATION
Inventor： HORII, Hiroshi
CPC classification number: F15B11/16 , E02F3/32 , E02F3/425 , E02F3/964 , E02F9/123 , E02F9/22 , E02F9/2225 , E02F9/2296 , F15B11/162 , F15B11/163 , F15B2211/20553 , F15B2211/30555 , F15B2211/3111 , F15B2211/35 , F15B2211/605 , F15B2211/7052 , F15B2211/7058 , F15B2211/71 , F15B2211/7135 , F15B2211/7142 , F15B2211/78 , F15B2211/781
Abstract: A hydraulic system for a work machine includes a first hydraulic actuator, a second hydraulic actuator, a hydraulic pump to discharge an operation fluid, a first control valve serving as a control valve to control the first hydraulic actuator, the first control valve including a first direction switch to switch the operation fluid and a pressure compensator to maintain a differential pressure to a constant pressure, the differential pressure being generated between a pressure of the operation fluid inputted and a pressure of the operation fluid to be outputted. And, the hydraulic system includes a second control valve serving as another control valve to control the second hydraulic actuator, the second control valve including a second direction switch to switch the operation fluid and a flow rate prioritizer to prioritize a flow rate of the operation fluid that is to be outputted to the second hydraulic actuator.
Abstract translation: 本发明提供一种作业机械的液压系统，其包括：第一液压致动器，第二液压致动器，排出工作流体的液压泵，作为控制第一液压致动器的控制阀的第一控制阀，第一控制阀包括第一 方向开关切换操作流体和压力补偿器以将压差保持为恒定压力，所述压差是在输入的操作流体的压力与要输出的操作流体的压力之间产生的。 并且，液压系统具备作为用于控制第二液压致动器的其他控制阀的第二控制阀，该第二控制阀具有切换工作流体的第二方向开关和流量优先顺序器，使工作流体的流量优先 将输出到第二液压致动器。
