公开(公告)号：US20060254268A1

公开(公告)日：2006-11-16

申请号：US10553099

申请日：2004-04-14

申请人： Toshifumi Yasuda ,  Shinegori Sakikawa ,  Kazuhiko Ohtsuki

发明人： Toshifumi Yasuda ,  Shinegori Sakikawa ,  Kazuhiko Ohtsuki

IPC分类号： F16D31/02

CPC分类号： F16H61/465 ,  F16H47/02 ,  F16H59/14 ,  F16H59/42 ,  F16H61/40 ,  F16H61/4035 ,  F16H61/4052

摘要： The present invention provides a load controller for use in a hydrostatic transmission for a work vehicle that is free from control failure caused by deterioration of the constituent components, and that can be miniaturized and simplified in structure compared to conventional load controllers. In the work vehicle, power supplied from an engine (E) is branched to drive an implement system and a traveling system. A hydrostatic transmission (1) is provided in the traveling system. The hydrostatic transmission (1) connects, in an oil-hydraulic closed circuit, an oil-hydraulic pump (2) driven by the engine (E) and an oil-hydraulic motor (4) driven by the oil-hydraulic pump (2). The load controller is provided with a bypass oil line for bypassing an oil line that has high pressure during forward movement (3a) in the oil-hydraulic closed circuit to reach an oil line that has low pressure during forward movement (3b) or an oil tank (T); a first opening/closing valve for opening or closing the bypass oil line (8); and an opening/closing valve (9) controller that detects a load applied to the engine (E) while traveling during working and opens the first opening/closing valve (9) when the load exceeds a predetermined level.

摘要翻译： 本发明提供了一种用于工作车辆的静液压变速器的负载控制器，其与组成部件的劣化无关的控制故障，并且与传统的负载控制器相比可以小型化和简化结构。 在工作车辆中，从发动机（E）供给的动力被分支以驱动车辆系统和行驶系统。 在行驶系统中设置静液压传动装置（1）。 液压传动装置（1）在油压闭路中连接由发动机（E）驱动的油压泵（2）和由油压泵（2）驱动的油压马达（4） 。 负载控制器设置有旁路油管线，用于绕过在油压闭合回路中向前运动（3a）期间具有高压力的油管线，以到达在向前运动（3b）期间具有低压的油管线 油箱（T）; 用于打开或关闭旁路油管线（8）的第一打开/关闭阀; 以及打开/关闭阀（9）控制器，其在工作期间行进时检测施加到发动机（E）的负荷，并且当负载超过预定水平时打开第一开/关阀（9）。