公开(公告)号：US07077220B2

公开(公告)日：2006-07-18

申请号：US10722572

申请日：2003-11-28

申请人： James Thomas Dunn ,  Henry Jerome Schulz ,  Leonard Bergman

发明人： James Thomas Dunn ,  Henry Jerome Schulz ,  Leonard Bergman

IPC分类号： B62D11/04

CPC分类号： B60B35/003 ,  B60B35/1018 ,  B60B35/109 ,  B60B2310/305 ,  B60Y2200/221 ,  B62D49/00 ,  Y10T16/196

摘要： A hydrostatic agricultural tractor has front ground wheels mounted on the frame at fixed angles parallel to each other and parallel to a center line of the frame and rear ground wheels mounted on a respective castor, with each of the front ground wheels being driven by a respective drive motor which allows variable speed in both the first and second directions such that steering of the tractor is effected by a differential in speed between the front wheels with the rear wheels following the steering in a castoring action. A pair of damper cylinders is provided each connected between a bracket on a rear axle of the frame and a lever in the castor plane of the castor so as to provide a damping force tending to restrict rotation of the respective second wheel about the respective vertical pivot axis with the damping force at a maximum value when the rear wheels are parallel to the center line in either the forward or reverse directions.

摘要翻译： 静液压农业拖拉机具有安装在框架上的固定角度彼此平行并且平行于框架的中心线和安装在相应脚轮上的后地面轮的框架的前地面轮，每个前地面轮由相应的 驱动马达，其允许在第一和第二方向上的可变速度，使得牵引车的转向由前轮与后轮之间的速度差在跟随转向动作的转向之后实现。 一对阻尼气缸被设置成各自连接在框架的后轴上的支架和脚轮的脚轮平面中的杠杆之间，以便提供阻尼力，该阻尼力趋向于限制相应的第二轮围绕相应垂直枢轴的旋转 当后轮在正向或反向方向上平行于中心线时，阻尼力处于最大值。

公开(公告)号：US07438305B2

公开(公告)日：2008-10-21

申请号：US11290826

申请日：2005-12-01

申请人： Henry Jerome Schulz

发明人： Henry Jerome Schulz

IPC分类号： B60R3/02

CPC分类号： B60R3/02

摘要： A tractor has a frame defined by two side rails extending longitudinally carried on ground wheels with a cab on the frame at one end and an engine compartment at the other end. The cab has doors on each side and there are provided two operator platforms each attached to the frame at a respective side with suitable ladder, guard rails and surface by which the operator can climb to the cab. Each operator platform is mounted for movement longitudinally of the frame on levers allowing movement along the side of the frame from the cab entry position to an engine service position. The platform can cover operator serviceable parts which in the cab position which are exposed when the platform is moved to the engine service position.

摘要翻译： 拖拉机具有由纵向延伸地承载在地面轮上的两个侧轨定义的框架，一端的框架上的驾驶室和另一端的发动机舱。 驾驶室在每一侧都有门，并且设有两个操作平台，每个操作平台各自在相应的一侧连接到框架，具有合适的梯子，护栏和操作者可以爬上驾驶室的表面。 每个操作平台被安装成在框架的纵向移动的杠杆上，允许沿着框架的侧面从驾驶室进入位置移动到发动机服务位置。 平台可以覆盖当平台移动到发动机服务位置时露出的驾驶室位置中的操作者可维修部件。