公开(公告)号：US20200071911A1

公开(公告)日：2020-03-05

申请号：US16556366

申请日：2019-08-30

申请人： TAKEUCHI MFG. CO., LTD.

发明人： Tomonori SATO

IPC分类号： E02F9/22 ,  E02F9/20 ,  F16H61/4035 ,  F16H61/47 ,  F15B7/00 ,  F15B11/16 ,  F15B11/044

摘要： To provide a traveling control mechanism and a traveling control method capable of controlling a traveling mechanism taking into consideration operation contents of a remote control valve. The problem is solved by a traveling control mechanism comprising a remote control valve (21, 22, 23, 24), a pressure adjusting solenoid valve (61, 62), a setting mechanism (70), and a controller (60). The traveling mechanism (8) allows a traveling speed to be switched between a high speed and a low speed in accordance with an operation amount of the remote control valve (21, 22, 23, 24). An HST circuit (30) is provided with a pump (31, 32) and a traveling motor (33), the pump (31, 32) connects to a pilot line (41, 42, 43, 44) allowing a hydraulic oil supplied from the remote control valve (21, 22, 23, 24) to flow therethrough, a pressure sensor (45) is attached to the pilot line (41, 42, 43, 44), and a rotation sensor (65) is attached to the traveling motor (33). The controller (60) controls a pressure of the hydraulic oil supplied from the remote control valve (21, 22, 23, 24) independently of a manual operation of the remote control valve (21, 22, 23, 24), on the basis of a setting signal, a pressure signal, and a rotation speed signal. The remote control valve (21, 22, 23, 24) controls a flow rate of the hydraulic oil discharged from the pump (31, 32) by changing or keeping constant the pressure inside the pilot line (41, 42, 43, 44).

公开(公告)号：US20170241448A1

公开(公告)日：2017-08-24

申请号：US15426574

申请日：2017-02-07

申请人： Takeuchi Mfg. Co., Ltd.

发明人： Hiroki KONDO ,  Shumpei OKUTANI ,  Takeshi KAKURYU ,  Takato TAKIZAWA ,  Tomonori SATO

IPC分类号： F15B11/16 ,  F16H61/4008 ,  F16H61/431 ,  E02F9/22 ,  F15B11/10 ,  B60W10/103 ,  B60W10/06 ,  B60W30/188 ,  F16H39/04 ,  F16H59/36

CPC分类号： F15B11/16 ,  B60W10/06 ,  B60W10/103 ,  B60W30/188 ,  B60Y2200/41 ,  E02F9/2225 ,  E02F9/225 ,  E02F9/2253 ,  E02F9/2267 ,  E02F9/2292 ,  F15B11/10 ,  F15B2211/20546 ,  F15B2211/25 ,  F15B2211/275 ,  F15B2211/56 ,  F15B2211/575 ,  F15B2211/6316 ,  F15B2211/633 ,  F15B2211/6346 ,  F15B2211/6355 ,  F15B2211/6651 ,  F15B2211/6652 ,  F15B2211/6653 ,  F15B2211/7053 ,  F15B2211/7058 ,  F15B2211/7135 ,  F15B2211/75 ,  F15B2211/78 ,  F15B2211/8613 ,  F16H39/04 ,  F16H59/36 ,  F16H61/4008 ,  F16H61/4139 ,  F16H61/431 ,  F16H61/433 ,  F16H61/465 ,  F16H61/478 ,  F16H2059/366

摘要： A travel control device is provided with hydraulic pumps of a variable capacity type that are driven by an engine; hydraulic motors that are driven by discharged oil from the hydraulic pumps; traveling devices that are rotation-driven by the hydraulic motors; a travel operation lever that is operated so as to instruct a traveling operation; a first control valve for generating a charged hydraulic pressure by adjusting the discharged oil from a charge pump and a second control valve for generating a capacity control hydraulic pressure in accordance with the operation of the travel operation lever. The first control valve is designed to pressure-adjust and generate a charged hydraulic pressure in accordance with the rotation speed of the engine, and the hydraulic pump is subjected to a variable capacity control process by a capacity control hydraulic pressure that is pressure-adjusted and generated by the second control valve.