公开(公告)号：US4805719A

公开(公告)日：1989-02-21

申请号：US98216

申请日：1987-09-18

申请人： Pentti Kostamo

发明人： Pentti Kostamo

IPC分类号： B60K17/10 ,  B60K17/34

CPC分类号： F16H61/431 ,  B60K17/10 ,  F16H2059/366

摘要： A vehicle is described having a front pair of ground contacting wheels, a rear pair of ground contacting wheels, an internal combustion engine, hydraulic motors for driving each said ground contacting wheel, and a plurality of variable flow hydraulic pumps for driving the hydraulic motors. In such a vehicle the internal combustion engine (7) is arranged to drive directly first and second variable displacement pumps (12, 13) for driving the motors (46, 47) of the front pair of wheels (2) and the motors (47, 48) of the back pair of wheels (3) respectively as well as first and second boost pumps (14, 15), while a control valve (22) is supplied with hydraulic fluid from one of the boost pumps (14) and is arranged to give an output hydraulic pressure which is dependent on the speed of the engine (7). A further valve (33, 34) is positioned under the control of the output hydraulic pressure from the control valve (22) in the path of hydraulic fluid from each of the boost pumps (14, 15) to a respective operating piston and cylinder arrangement (35, 36; 37, 38) for adjusting the displacement of the hydraulic pumps (12, 13) in dependence on the speed of the engine (7).

摘要翻译： 描述了一种车辆，其具有前一对接地轮，后一对接地轮，内燃机，用于驱动每个所述接地轮的液压马达和用于驱动液压马达的多个可变流量液压泵。 在这种车辆中，内燃机（7）被布置成直接驱动第一和第二可变排量泵（12,13），用于驱动前轮对（2）和马达（47）的马达（46,47） 分别为后一对车轮（3）以及第一和第二增压泵（14,15），而控制阀（22）从其中一个增压泵（14）供应液压流体，并且是 被布置成给出取决于发动机（7）的速度的输出液压。 在来自每个增压泵（14,15）的液压流体的路径中，来自控制阀（22）的输出液压的控制下的另一个阀（33,34）被定位到相应的操作活塞和气缸装置 （35,36; 37,38），用于根据发动机（7）的速度来调节液压泵（12,13）的位移。

公开(公告)号：US4804055A

公开(公告)日：1989-02-14

申请号：US98217

申请日：1987-09-18

申请人： Pentti Kostamo

发明人： Pentti Kostamo

IPC分类号： B62D49/02 ,  B62D49/06 ,  B60K17/28 ,  B60K25/00

CPC分类号： B62D49/02 ,  B62D49/065 ,  Y10S180/90

摘要： An attachment for a tractor comprises a frame which is demountable from the tractor, a hydraulic motor having a power take off shaft mounted on the frame, a pivotal attachment mounting for an upper link of a three point hitch, lifting arms pivotally mounted on the frame for raising and lowering the lower links of the three point hitch by means of swinging link arms connected between the lower links and the lifting arms, hydraulic rams mounted on the frame for raising and lowering the lifting arms, and respective releasable hydraulic couplings connected to the hydrulic motor and to the rams for connection to a hydraulic system of the tractor.

摘要翻译： 用于拖拉机的附件包括可从拖拉机拆卸的框架，具有安装在框架上的动力输出轴的液压马达，用于三点搭接的上连杆的枢转附接安装件，可枢转地安装在框架上的提升臂 用于通过连接在下连杆和提升臂之间的摆动连杆臂升高和降低三点搭接的下连杆，安装在框架上的用于升高和降低提升臂的液压柱塞以及连接到起重臂的相应的可释放液压联轴器 水力马达和用于与拖拉机的液压系统连接的公柱。