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：US20160245408A1

公开(公告)日：2016-08-25

申请号：US14383120

申请日：2014-01-07

Applicant: Komatsu Ltd.

Inventor： Takuya Nohara ,  Hiroyuki Chikugo ,  Shuuji Hori ,  Mitsumasa Akashi

IPC: F16J13/12

CPC classification number: F16J13/12 ,  F16L55/1108

Abstract: A blocking configuration of an oil pressure circuit hole includes a plug screwed together with an aperture end portion of the oil pressure circuit hole provided to a main body. The plug includes: a shaft portion; an external thread portion disposed on a leading end of the shaft portion; an O-ring mounted on an outer periphery of a base end portion of the shaft portion and pressed between the outer periphery of the shaft portion and an inner periphery of the oil pressure circuit hole to seal them; a flange portion having an external diameter larger than that of the shaft portion and disposed on a part of a base end side of a storage groove on which the O-ring is mounted; and a polygonal column-shaped head portion on which a tightening tool is mounted and disposed on a part of a base end side of the flange portion.

Abstract translation: 油压回路孔的阻塞构造包括与设置在主体上的油压回路孔的孔端部螺纹连接的螺栓。 插头包括：轴部; 设置在所述轴部的前端的外螺纹部; O型圈，其安装在所述轴部的基端部的外周上并且被压在所述轴部的外周与所述油压回路孔的内周之间以密封; 凸缘部，其外径大于所述轴部的外径，并且设置在所述O形环安装在所述容纳槽的基端侧的一部分上; 以及多边形柱状的头部，在所述凸缘部的基端侧的一部分上安装有紧固工具。

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：US09599225B2

公开(公告)日：2017-03-21

申请号：US14383120

申请日：2014-01-07

Applicant: Komatsu Ltd.

Inventor： Takuya Nohara ,  Hiroyuki Chikugo ,  Shuuji Hori ,  Mitsumasa Akashi

IPC: F16J13/12 ,  F16L55/11

CPC classification number: F16J13/12 ,  F16L55/1108

Abstract: A blocking configuration of an oil pressure circuit hole includes a plug screwed together with an aperture end portion of the oil pressure circuit hole provided to a main body. The plug includes: a shaft portion; an external thread portion disposed on a leading end of the shaft portion; an O-ring mounted on an outer periphery of a base end portion of the shaft portion and pressed between the outer periphery of the shaft portion and an inner periphery of the oil pressure circuit hole to seal them; a flange portion having an external diameter larger than that of the shaft portion and disposed on a part of a base end side of a storage groove on which the O-ring is mounted; and a polygonal column-shaped head portion on which a tightening tool is mounted and disposed on a part of a base end side of the flange portion.

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。