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    • 3. 发明授权
    • Implement hitch
    • 实施搭便车
    • US5052495A
    • 1991-10-01
    • US610008
    • 1990-11-07
    • Stanley E. McFarlaneJames E. McFarlane
    • Stanley E. McFarlaneJames E. McFarlane
    • A01B49/02A01B51/00A01B73/04
    • A01B73/044A01B49/02A01B51/00
    • A hitch for connecting a first implement to a second implement pulled behind a tractor is disclosed which has a first parallel linkage assembly with two upright members with upper and lower portions, the upper portions of the upright members being connected by an upper follower arm and the lower portions of the upright members being pivotally connected by a lower follower arm. One upright member is adapted to rigidly connect to the second implement. A central horizontal member has two opposed ends and front and rear sides. An upright member of the first parallel linkage is rigidly connected to the front side of the horizontal member. Ground engaging caster wheels are pivotally mounted on each end of the horizontal member. A second parallel linkage has two upright members with upper and lower portions. The upper portions of the upright members are pivotally connected by an upper lifting arm and the lower portions of the upright members are pivotally connected by a lower lifting arm. One upright member is rigidly connected to the rear side of the horizontal member and the other upright member is adapted to connect to the first implement. An actuator is mounted between the central member and the second parallel linkage and adapted to move a connected first implement between a first lowered, ground-engaging position and an elevated position, wherein the weight of the first implement is substantially carried by the caster wheel. The hitch may be employed for connecting a harrow or drag behind a tractor-pulled disc tiller.
    • 公开了一种将第一工具连接到拖拉机后面的第二工具的连接件,其具有带有两个具有上部和下部的直立部件的第一平行连杆组件,直立部件的上部通过上部从动臂连接, 直立构件的下部由下部从动臂枢转地连接。 一个直立构件适于刚性地连接到第二工具。 中央水平构件具有两个相对的端部和前侧和后侧。 第一平行连杆的直立构件刚性地连接到水平构件的前侧。 地面接合轮脚轮可枢转地安装在水平构件的每一端上。 第二平行连杆具有两个具有上部和下部的直立部件。 直立构件的上部通过上升臂枢转地连接,并且直立构件的下部通过下部提升臂枢转地连接。 一个直立构件刚性地连接到水平构件的后侧,另一直立构件适于连接到第一工具。 致动器安装在中心构件和第二平行连杆之间,并且适于在第一降低的接地位置和升高位置之间移动连接的第一工具,其中第一工具的重量基本上由脚轮驱动。 拖拉机可用于连接拖拉机拖拉盘后的耙子或拖车。