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公开(公告)号：US06474426B2
公开(公告)日：2002-11-05
申请号：US09814184
申请日：2001-03-22
申请人： Shigeru Yamamoto , Toshikazu Okada , Hisao Asada , Tomohiro Nakagawa , Ikuo Kita
发明人： Shigeru Yamamoto , Toshikazu Okada , Hisao Asada , Tomohiro Nakagawa , Ikuo Kita
IPC分类号： B62D1106
CPC分类号： B62D11/183
摘要： A steering method and steering system which enable a minimum turn radius more than the discharge capacities of a hydraulic motor and a hydraulic pump and which positively prevent the unstable traveling and turning behavior of a vehicle when the vehicle makes a pivot turn. The vehicle is provided with a pair of brakes for right and left output shafts and designed to transmit the driving force of the hydraulic motor to the output shafts through planetary gear mechanisms. During a pivot turn of the vehicle, an operation of the brake of either one of the right and left output shafts and a transmission of a driving force from the hydraulic motor to a planetary gear mechanism are simultaneously carried out for a specified period of time and thereafter, the transmission of the driving force from the hydraulic motor to the planetary gear mechanism is interrupted.
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公开(公告)号：US06349882B1
公开(公告)日：2002-02-26
申请号：US09553156
申请日：2000-04-20
IPC分类号： F01P702
摘要： A controlling device for a hydraulically operated cooling fan capable of obtaining optimum cooling efficiency by continuously controlling a rotational frequency of the cooling fan according to a cooling water temperature, a hydraulic oil temperature, and an engine speed is provided. To this end, the controlling device includes a hydraulic motor (16) for driving a cooling fan (13), a variable displacement hydraulic pump (14) capable of controlling the rotational frequency of the hydraulic motor (16), a cooling water temperature sensor (21) for detecting a cooling water temperature (TW), a hydraulic oil temperature sensor (22) for detecting a hydraulic oil temperature (To), an engine speed sensor (23) for detecting an engine speed (E), and a controller (20) which inputs detected signals from these sensors (21, 22, 23), computes and outputs a discharge capacity command value of the variable displacement hydraulic pump (14) according to the inputted cooling water temperature (Tw), hydraulic oil temperature (To), and engine speed (E), and continuously controls a rotational frequency (N) of the cooling fan (13) by means of the variable displacement hydraulic pump (14).
摘要翻译： 提供一种用于通过根据冷却水温度，液压油温度和发动机转速连续控制冷却风扇的转速来获得最佳冷却效率的液压冷却风扇的控制装置。 为此，控制装置包括用于驱动冷却风扇（13）的液压马达（16），能够控制液压马达（16）的转速的可变排量液压泵（14），冷却水温度传感器 用于检测冷却水温度（TW）的控制器（21），用于检测液压油温度（To）的液压油温度传感器（22），用于检测发动机转速（E）的发动机转速传感器（23） 输入来自这些传感器（21,22,23）的检测信号的输入端（20）根据输入的冷却水温度（Tw），液压油温度（Tw）计算并输出可变排量液压泵（14）的排出容量指令值 To）和发动机转速（E），并通过可变排量液压泵（14）连续地控制冷却风扇（13）的转速（N）。
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公开(公告)号：US06481506B2
公开(公告)日：2002-11-19
申请号：US09821793
申请日：2001-03-30
申请人： Toshikazu Okada , Ikuo Kita
发明人： Toshikazu Okada , Ikuo Kita
IPC分类号： E02F385
CPC分类号： E02F3/7618 , E02F9/22
摘要： To provide a dual tilt control system for a work vehicle, the system being capable of using a switching valve adapted to low pressure and low flow rates and left and right tilt cylinders of the same diameter and yielding large force during pitch and dual tilt operations and requiring no piston valve. A left tilt cylinder driving hydraulic circuit and a right tilt cylinder driving hydraulic circuit for respectively supplying pressure oil from a hydraulic pump to the left and right cylinders are arranged in parallel and comprise a left tilt cylinder actuation switching valve and a right tilt cylinder actuation switching valve, respectively. In a pilot pressure signal circuit for controlling the tilt cylinder actuation switching valves, a pilot switching valve for switching a blade between the pitch operation, a single tilt operation and the dual tilt operation by means of the left and right cylinders is provided.
摘要翻译： 为了提供一种用于工作车辆的双倾斜控制系统，该系统能够使用适于低压和低流量的切换阀以及相同直径的左右倾斜缸，并且在俯仰和双倾斜操作期间产生大的力，并且 不需要活塞阀。 左倾斜缸驱动液压回路和用于分别从液压泵向左右气缸供应压力油的右倾斜缸驱动液压回路平行布置，包括左倾斜气缸致动切换阀和右倾斜气缸致动切换 阀门。 在用于控制倾斜气缸致动切换阀的先导压力信号电路中，提供了用于通过左右气缸在桨距操作，单次倾斜操作和双倾斜操作之间切换叶片的先导切换阀。
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公开(公告)号：US08899371B2
公开(公告)日：2014-12-02
申请号：US13883199
申请日：2012-09-04
IPC分类号： B60K17/356 , E02F3/84 , E02F3/76 , E02F9/08 , E02F9/22
CPC分类号： E02F3/84 , E02F3/7609 , E02F9/0825 , E02F9/0891 , E02F9/2275
摘要： A vehicle body frame of a bulldozer has a left side frame, a right side frame, a base plate, and a cross member. The left and right side frames each extend in the front and back direction. The base plate spans across between the left and right side frames. The cross member is positioned between a hydraulic pump and left and right hydraulic motors. The cross member protrudes upward from the base plate. The cross member spans across between the left and right side frames. The cross member has a left conduit hole and a right conduit hole which are spaced apart in a left and right direction of the bulldozer. The first and second left hydraulic fluid tubes pass through the left conduit hole. The first and second right hydraulic fluid tubes pass through the right conduit hole.
摘要翻译： 推土机的车身框架具有左侧框架，右侧框架，基板和横梁。 左右侧框架各自在前后方向上延伸。 底板横跨左右侧框架。 横向构件位于液压泵和左右液压马达之间。 横向构件从基板向上突出。 十字架横跨左右侧框架。 横向构件具有在推土机的左右方向上间隔开的左导管孔和右导管孔。 第一和第二左液压流体管通过左导管孔。 第一和第二右液压流体管通过右导管孔。
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公开(公告)号：US20140041956A1
公开(公告)日：2014-02-13
申请号：US13883199
申请日：2012-09-04
IPC分类号： E02F3/84
CPC分类号： E02F3/84 , E02F3/7609 , E02F9/0825 , E02F9/0891 , E02F9/2275
摘要： A vehicle body frame of a bulldozer has a left side frame, a right side frame, a base plate, and a cross member. The left and right side frames each extend in the front and back direction. The base plate spans across between the left and right side frames. The cross member is positioned between a hydraulic pump and left and right hydraulic motors. The cross member protrudes upward from the base plate. The cross member spans across between the left and right side frames. The cross member has a left conduit hole and a right conduit hole which are spaced apart in a left and right direction of the bulldozer. The first and second left hydraulic fluid tubes pass through the left conduit hole. The first and second right hydraulic fluid tubes pass through the right conduit hole.
摘要翻译： 推土机的车身框架具有左侧框架，右侧框架，基板和横梁。 左右侧框架各自在前后方向上延伸。 底板横跨左右侧框架。 横向构件位于液压泵和左右液压马达之间。 横向构件从基板向上突出。 十字架横跨左右侧框架。 横向构件具有在推土机的左右方向上间隔开的左导管孔和右导管孔。 第一和第二左液压流体管通过左导管孔。 第一和第二右液压流体管通过右导管孔。
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