公开(公告)号：US20190003497A1

公开(公告)日：2019-01-03

申请号：US16069207

申请日：2016-01-29

Applicant: Komatsu Ltd.

Inventor： Shuuji Hori ,  Masato Kageyama ,  Mutsumi Ono ,  Hiroyuki Chikugo ,  Akira Hasebe ,  Junichi Fukushima ,  Shunsuke Koike

IPC: F15B13/04 ,  F15B11/10 ,  F15B13/043 ,  F15B13/042 ,  F16K31/06

Abstract: A hydraulic cylinder spool valve device, which extends and retracts a cylinder rod of a hydraulic cylinder, includes: a first spool valve having a first dead band and a first opening characteristic; a second spool valve having a second dead band and a second opening characteristic; and a controller performing communication with the hydraulic cylinder by using the first spool valve and positioning the second spool of the second spool valve within the second dead band and performing communication with the hydraulic cylinder by using the second spool valve and positioning the first spool of the first spool valve within the first dead band, and adjusting a characteristic of a switching dead band between the first opening characteristic and the second opening characteristic.

公开(公告)号：US09309647B2

公开(公告)日：2016-04-12

申请号：US14726670

申请日：2015-06-01

Applicant: KOMATSU LTD.

Inventor： Kota Imanishi ,  Hiroyuki Chikugo ,  Shuuji Hori ,  Mitsumasa Akashi ,  Akira Hasebe ,  Shuki Akushichi ,  Nobumasa Takamatsu

IPC: B62D5/09 ,  E02F9/22 ,  B62D1/22 ,  B62D12/00 ,  E02F9/08 ,  B62D5/07 ,  B62D5/28 ,  B62D5/12 ,  B62D5/18 ,  B62D5/20

CPC classification number: E02F9/225 ,  B62D1/22 ,  B62D5/075 ,  B62D5/09 ,  B62D5/091 ,  B62D5/12 ,  B62D5/18 ,  B62D5/20 ,  B62D5/28 ,  B62D12/00 ,  E02F9/0841 ,  E02F9/2285 ,  E02F9/2296

Abstract: A steering device for a wheel loader includes a handle for steering, a lever for steering, a steering cylinder, a steering valve that controls a direction of operating fluid to the steering cylinder, and a pump that supplies operating fluid to the steering cylinder via the steering valve. The steering device further includes a handle control valve that controls the supply direction of the operating fluid according the handle, a lever electromagnetic control valve that controls the supply direction of operating fluid according to the lever, and a handle prioritization valve that shuts off a pilot hydraulic pressure supplied from the lever electromagnetic control valve to the steering valve according to a pressure produced by operating fluid flowing through the handle control valve when the handle is operated. Communication between the lever electromagnetic control valve and the steering valve is allowed when only the lever electromagnetic control valve is operated.

Abstract translation: 一种用于轮式装载机的转向装置，包括用于转向的手柄，用于转向的转向杆，转向缸，控制向转向缸工作流体的方向的转向阀，以及经由该转向缸将工作流体供给到转向缸的泵 转向阀 所述转向装置还包括手柄控制阀，所述手柄控制阀根据所述手柄控制所述工作流体的供给方向，杠杆电磁控制阀，其根据所述杠杆控制工作流体的供给方向;以及手柄优先阀， 根据在手柄操作时流经手柄控制阀的工作流体产生的压力，从杠杆电磁控制阀供给到转向阀的液压。 只有杠杆电磁控制阀工作时才允许杠杆电磁控制阀和转向阀之间的通信。

公开(公告)号：US10753376B2

公开(公告)日：2020-08-25

申请号：US16069207

申请日：2016-01-29

Applicant: Komatsu Ltd.

Inventor： Shuuji Hori ,  Masato Kageyama ,  Mutsumi Ono ,  Hiroyuki Chikugo ,  Akira Hasebe ,  Junichi Fukushima ,  Shunsuke Koike

IPC: F15B11/04 ,  F15B13/04 ,  F15B11/042 ,  F15B13/12 ,  F15B11/10 ,  F15B13/042 ,  F15B13/043 ,  F16K31/06 ,  E02F9/22

Abstract: A hydraulic cylinder spool valve device, which extends and retracts a cylinder rod of a hydraulic cylinder, includes: a first spool valve having a first dead band and a first opening characteristic; a second spool valve having a second dead band and a second opening characteristic; and a controller performing communication with the hydraulic cylinder by using the first spool valve and positioning the second spool of the second spool valve within the second dead band and performing communication with the hydraulic cylinder by using the second spool valve and positioning the first spool of the first spool valve within the first dead band, and adjusting a characteristic of a switching dead band between the first opening characteristic and the second opening characteristic.

公开(公告)号：US09309646B2

公开(公告)日：2016-04-12

申请号：US14726658

申请日：2015-06-01

Applicant: KOMATSU LTD.

Inventor： Kota Imanishi ,  Hiroyuki Chikugo ,  Shuuji Hori ,  Mitsumasa Akashi ,  Akira Hasebe ,  Shuki Akushichi ,  Nobumasa Takamatsu

IPC: B62D5/20 ,  E02F9/22 ,  B62D1/22 ,  B62D5/09 ,  B62D12/00 ,  E02F9/08 ,  B62D5/07 ,  B62D5/28 ,  B62D5/12 ,  B62D5/18

CPC classification number: E02F9/225 ,  B62D1/22 ,  B62D5/075 ,  B62D5/09 ,  B62D5/091 ,  B62D5/12 ,  B62D5/18 ,  B62D5/20 ,  B62D5/28 ,  B62D12/00 ,  E02F9/0841 ,  E02F9/2285 ,  E02F9/2296

Abstract: A steering device for a wheel loader includes a handle for steering, a lever for steering, a steering cylinder, a steering valve that controls a direction of operating fluid to the steering cylinder, and a pump that supplies operating fluid to the steering cylinder via the steering valve. The steering device further includes a handle control valve that controls the supply direction of the operating fluid according the handle, a lever electromagnetic control valve that controls the supply direction of operating fluid according to the lever, and a handle prioritization valve that shuts off a pilot hydraulic pressure supplied from the lever electromagnetic control valve to the steering valve according to a pressure produced by operating fluid flowing through the handle control valve when the handle is operated. The handle prioritization valve includes a switching valve and a priority control valve switchable between a handle stage and a lever stage.

Abstract translation: 一种用于轮式装载机的转向装置，包括用于转向的手柄，用于转向的转向杆，转向缸，控制向转向缸工作流体的方向的转向阀，以及经由该转向缸将工作流体供给到转向缸的泵 转向阀 所述转向装置还包括手柄控制阀，所述手柄控制阀根据所述手柄控制所述工作流体的供给方向，杠杆电磁控制阀，其根据所述杠杆控制工作流体的供给方向;以及手柄优先阀， 根据在手柄操作时流经手柄控制阀的工作流体产生的压力，从杠杆电磁控制阀供给到转向阀的液压。 手柄优先阀包括切换阀和可在手柄级和杠杆级之间切换的优先控制阀。

公开(公告)号：US20140083792A1

公开(公告)日：2014-03-27

申请号：US14122405

申请日：2012-04-19

Applicant: KOMATSU LTD.

Inventor： Kota Imanishi ,  Hiroyuki Chikugo ,  Shuuji Hori ,  Mitsumasa Akashi ,  Akira Hasebe ,  Shuki Akushichi ,  Nobumasa Takamatsu

IPC: E02F9/22 ,  B62D5/07 ,  B62D5/28

CPC classification number: E02F9/225 ,  B62D1/22 ,  B62D5/075 ,  B62D5/09 ,  B62D5/091 ,  B62D5/12 ,  B62D5/18 ,  B62D5/20 ,  B62D5/28 ,  B62D12/00 ,  E02F9/0841 ,  E02F9/2285 ,  E02F9/2296

Abstract: A steering device for a wheel loader includes a rotatable handle, a tiltable lever, a steering cylinder, a steering valve, a pump, a handle control valve, a lever control valve, and a handle prioritization valve. The steering valve controls a supply direction of operating fluid to the steering cylinder with pilot hydraulic pressure. The pump supplies operating fluid to the steering cylinder via the steering valve. The handle and lever control valves supply pilot hydraulic pressure to control the supply direction to the steering valve according to handle rotation and lever tilt, respectively. The handle prioritization valve shuts off the pilot hydraulic pressure supplied from the lever control valve to the steering valve according to a differential pressure or an absolute pressure in a hydraulic circuit produced due to operating fluid flowing through the handle control valve when the handle is operated.

Abstract translation: 用于轮式装载机的转向装置包括可旋转手柄，可倾斜杆，转向缸，转向阀，泵，手柄控制阀，杠杆控制阀和手柄优先阀。 转向阀通过先导液压控制到转向缸的工作流体的供给方向。 泵通过转向阀将工作流体提供给转向油缸。 手柄和杠杆控制阀分别提供先导液压以根据手柄旋转和杠杆倾斜来控制转向阀的供给方向。 手柄优先阀根据手柄操作时由于通过手柄控制阀流动的工作流体产生的液压回路中的差压或绝对压力，切断从杠杆控制阀供给到转向阀的先导液压。

公开(公告)号：US20180296948A1

公开(公告)日：2018-10-18

申请号：US15519971

申请日：2014-10-30

Applicant: Komatsu Ltd.

Inventor： Akira Hasebe ,  Hiroyuki Chikugo ,  Shuuji Hori

IPC: B01D29/03 ,  B01D39/10

Abstract: An oil filter includes a filter body including first and second plates stacked to each other, the first plate including a plurality of filtration holes, the second plate including a plurality of passage holes, an inner diameter of the passage holes being greater than an inner diameter of the filtration holes, the filtration holes facing the respective passage holes. Further, the first plate and the second plate are bonded to each other in a manner that a whole area of openings of the filtration holes is arranged within a range of openings of the passage holes.

公开(公告)号：US09309648B2

公开(公告)日：2016-04-12

申请号：US14726683

申请日：2015-06-01

Applicant: KOMATSU LTD.

Inventor： Kota Imanishi ,  Hiroyuki Chikugo ,  Shuuji Hori ,  Mitsumasa Akashi ,  Akira Hasebe ,  Shuki Akushichi ,  Nobumasa Takamatsu

IPC: B62D1/22 ,  E02F9/22 ,  B62D5/09 ,  B62D12/00 ,  E02F9/08 ,  B62D5/07 ,  B62D5/28 ,  B62D5/12 ,  B62D5/18 ,  B62D5/20

CPC classification number: E02F9/225 ,  B62D1/22 ,  B62D5/075 ,  B62D5/09 ,  B62D5/091 ,  B62D5/12 ,  B62D5/18 ,  B62D5/20 ,  B62D5/28 ,  B62D12/00 ,  E02F9/0841 ,  E02F9/2285 ,  E02F9/2296

Abstract: A steering device for a wheel loader includes a handle for steering, a lever for steering, a steering cylinder, a steering valve that controls a direction of operating fluid to the steering cylinder, a pump that supplies operating fluid to the steering cylinder via the steering valve, and a return oil passage connected to a tank. The steering device further includes a handle control valve that controls the supply direction of the operating fluid according the handle, a lever electromagnetic control valve that controls the supply direction of operating fluid according to the lever, and a handle prioritization valve that shuts off a pilot hydraulic pressure supplied from the lever electromagnetic control valve to the steering valve according to a pressure produced by operating fluid flowing through the handle control valve when the handle is operated. The handle prioritization valve includes a throttle arranged in the return oil passage.

Abstract translation: 一种用于轮式装载机的转向装置，包括用于转向的手柄，用于转向的转向杆，转向缸，控制向转向缸工作流体的方向的转向阀，经由转向器向操作缸供给工作流体的泵 阀和连接到油箱的回油通道。 所述转向装置还包括手柄控制阀，所述手柄控制阀根据所述手柄控制所述工作流体的供给方向，杠杆电磁控制阀，其根据所述杠杆控制工作流体的供给方向;以及手柄优先阀， 根据在手柄操作时流经手柄控制阀的工作流体产生的压力，从杠杆电磁控制阀供给到转向阀的液压。 手柄优先阀包括布置在返回油通道中的节流阀。