公开(公告)号：US20170184134A1

公开(公告)日：2017-06-29

申请号：US15387548

申请日：2016-12-21

Applicant: KUBOTA CORPORATION

Inventor： Hiroshi HORII

IPC: F15B11/16 ,  E02F9/22 ,  E02F9/12 ,  E02F3/42

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 control valve including a first direction switch to switch a direction in which the operation fluid is to flow through a first hydraulic actuator and a pressure compensator to maintain a differential pressure to a constant pressure, the differential pressure being a difference between a pressure of the operation fluid to be inputted to the pressure compensator and a pressure of the operation fluid to be outputted from the pressure compensator. And, the hydraulic system includes a second control valve including a second direction switch to switch a direction in which the operation fluid is to flow through a second hydraulic actuator and a flow rate prioritizer to prioritize a flow rate of the operation fluid to be outputted to the second hydraulic actuator.

公开(公告)号：US20250109569A1

公开(公告)日：2025-04-03

申请号：US18976799

申请日：2024-12-11

Applicant: KUBOTA CORPORATION

Inventor： Yoichi NISHIGORI ,  Hiroshi HORII ,  Satoru SAKURAOKA

IPC: E02F9/08 ,  E02F9/16

Abstract: A working machine includes a cabin, an air conditioner body to generate conditioned air supplied into the cabin, and a duct structure to guide conditioned air from the air conditioner body. The air conditioner body is operable to mix cool air and warm air to generate conditioned air for cooling/heating, the duct structure includes a first duct to allow conditioned air for cooling to flow therethrough, a second duct to allow conditioned air for heating to flow therethrough, a switching box connected to the first and second ducts and including a switch portion to switch between a first state in which conditioned air is allowed to flow through the first duct, and a second state in which conditioned air is allowed to flow through the second duct, and a relay duct to connect the air conditioner body and the switching box to guide conditioned air to the switching box.

公开(公告)号：US20230323629A1

公开(公告)日：2023-10-12

申请号：US18205831

申请日：2023-06-05

Applicant: KUBOTA CORPORATION

Inventor： Hiroshi HORII ,  Masaaki UEDA ,  Yoichi NISHIGORI ,  Kazuyuki HATTA ,  Kazuaki SYOBU

IPC: E02F9/08 ,  B60H1/32 ,  B60H1/00 ,  B60K15/067

CPC classification number: E02F9/0866 ,  B60H1/00378 ,  B60H1/3222 ,  B60H1/3228 ,  B60H1/3229 ,  B60K15/067 ,  B60H1/00485

Abstract: A working machine includes a machine body, a cabin on the machine body, an air conditioner body for air conditioning in the cabin, and a prime mover room to contain a prime mover on the machine body. The air conditioner body is disposed above the prime mover room.

公开(公告)号：US20230117431A1

公开(公告)日：2023-04-20

申请号：US18077736

申请日：2022-12-08

Applicant: KUBOTA CORPORATION

Inventor： Hiroshi HORII

IPC: E02F9/16 ,  G05G1/445 ,  G05G1/01 ,  E02F9/20 ,  G05G1/483

Abstract: A working machine includes: an operator’s seat; and at least one pedal to be operated by being stepped on with a foot, or with feet. The at least one pedal is disposed ahead of the operator’s seat. The at least one pedal includes a pedal body extending in a predetermined direction, a pedal shaft having an axis intersecting the predetermined direction and supporting the pedal body in such a way as to allow pivotal motion of the pedal body around the axis, and a tread surface provided on an upper surface of the pedal body and being a surface on which an operator places the foot. The tread surface is sloped such that a height from the pedal body decreases gradually from a portion closer to a big toe of the foot of the operator placed thereon toward a portion closer to a little toe.

公开(公告)号：US20220235534A1

公开(公告)日：2022-07-28

申请号：US17554443

申请日：2021-12-17

Applicant: KUBOTA CORPORATION

Inventor： Hiroshi HORII

IPC: E02F9/20 ,  E02F3/32 ,  E02F3/43 ,  E02F9/12

Abstract: A swivel working machine includes a machine body swivelable around a swivel axis, a working device attached to the machine body swingably around a swing axis, an operation member to be handled and operated by an operator, and a controller to control swivel movement, which is a swiveling movement of the machine body, and swing movement, which is a swinging movement of the working device. The controller includes an operation pattern shifting unit configured or programmed to perform shifting between a swivel operation state where operation of the operation member in a specific direction causes the swivel movement and a swing operation state where the operation of the operation member in the specific direction causes the swing movement.

公开(公告)号：US20190121386A1

公开(公告)日：2019-04-25

申请号：US16227825

申请日：2018-12-20

Applicant: KUBOTA CORPORATION

Inventor： Hiroshi HORII

IPC: G05G9/047 ,  G05G1/06 ,  G05G5/05 ,  E02F9/20

Abstract: An operation device includes a grip to be grasped by an operator, and a supporting portion supporting the grip and allowing the grip to be turned in an arbitrary turning direction. A rotation fulcrum of the grip is positioned inside the grip. In this manner, the present invention requires less hand operation and is configured to be stably operated even when a machine body is shaken.

公开(公告)号：US20250101712A1

公开(公告)日：2025-03-27

申请号：US18976775

申请日：2024-12-11

Applicant: KUBOTA CORPORATION

Inventor： Yoichi NISHIGORI ,  Hiroshi HORII

IPC: E02F9/16 ,  B60S1/04 ,  E05C1/00 ,  E05C1/10

Abstract: A cabin of a working machine includes a protective frame vertically provided around an operator's seat; a roof at an upper portion of the protective frame; and a front window at a front portion of the protective frame. The front window is vertically divided into an upper window portion coupled to a window frame at the front portion of the protective frame so as to be movable toward a lower surface of the roof, and a lower window portion detachably coupled to the window frame. The window frame includes a lower window stay to engage with a lower edge of the lower window portion, and a lock receiver to hold a side edge of the lower window portion in a closed position. The lower window portion includes a lock to be fitted to the lock receiver when the side edge of the lower window portion overlaps the window frame.

公开(公告)号：US20240328122A1

公开(公告)日：2024-10-03

申请号：US18741261

申请日：2024-06-12

Applicant: KUBOTA CORPORATION

Inventor： Hiroshi HORII ,  Hiroya MORI

IPC: E02F9/22

CPC classification number: E02F9/2285 ,  E02F9/2228

Abstract: A hydraulic system of a working machine includes: a hydraulic actuator; a direction switching valve; the solenoid proportional valve; a controller to control a current to be supplied to the solenoid proportional valve; an operation member for a worker to operate the hydraulic actuator; and a permission operation actuator capable of performing a switching operation between a permission operation for permitting driving of the hydraulic actuator and a non-permission operation for not permitting the driving, in which, when the permission operation actuator is subjected to the non-permission operation and a temperature of the hydraulic fluid is lower than a predetermined temperature, the controller supplies, to the solenoid proportional valve, a first standby current of a first current value defined in a range in which a switching position of the direction switching valve is not switched.

公开(公告)号：US20240328120A1

公开(公告)日：2024-10-03

申请号：US18738284

申请日：2024-06-10

Applicant: KUBOTA CORPORATION

Inventor： Hiroya MORI ,  Hiroshi HORII

IPC: E02F9/22

CPC classification number: E02F9/2228 ,  E02F9/2285

Abstract: In a hydraulic system of a working device, a controller includes a first calculator that calculates a first electric current value for decelerating an angular velocity of a movable member, a second calculator that calculates a second electric current value for decreasing a supply flow rate of a hydraulic fluid to a hydraulic cylinder, and an electric current restrictor that corrects an electric current supplied to an electromagnetic proportional valve by the second electric current value if a determination distance of an operation length from a current operation position of the hydraulic cylinder to a stroke end is longer than a first threshold value and is not more than a second threshold value and corrects the electric current supplied to the electromagnetic proportional valve by either the selected first or second electric current value if the determination distance is not more than the first threshold value.

公开(公告)号：US20230021137A1

公开(公告)日：2023-01-19

申请号：US17840235

申请日：2022-06-14

Applicant: KUBOTA CORPORATION

Inventor： Hiroshi HORII

IPC: E02F9/22

Abstract: A working machine includes: a plurality of hydraulic actuators including a high-load hydraulic actuator and a low-load hydraulic actuator whose hydraulic pressure for actuation thereof is lower than that of the high-load hydraulic actuator; a plurality of direction switching valves each of which switches a direction of a hydraulic fluid for a corresponding one of the hydraulic actuators, the plurality of direction switching valves including a low-load direction switching valve that switches a direction of hydraulic fluid for the low-load hydraulic actuator; and a dummy-load forming unit that forms a dummy load in the low-load direction switching valve to suppress a variation in an actuation speed of the low-load hydraulic actuator between a time when the high-load hydraulic actuator and the low-load hydraulic actuator are operated in combination and a time when the low-load hydraulic actuator is operated singly.