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    • 5. 发明授权
    • Agricultural implement with hitch control
    • 农用拖把控制
    • US4428435A
    • 1984-01-31
    • US376358
    • 1982-05-10
    • Kevin L. HubbardRobert R. Roth
    • Kevin L. HubbardRobert R. Roth
    • A01B63/22
    • A01B63/22
    • A tractor-drawn agricultural implement of the type that requires a floating hitch member while operating but a rigid hitch member while in transport. This is achieved according to the present invention by linkage connected between a hitch member control mechanism and the cranked axle that serves as the wheeled carrying structure for the implement main frame. The linkage is arranged so that when the main frame is in its lowered or operating mode, a stop is clear from the hitch member control so that the hitch member has a free pivotal movement about a transverse axis, but when the frame is raised to transport or raised mode, the stop engages the hitch member control and renders the hitch member rigid with the frame.
    • 拖拉机式农用工具,在运输过程中需要一个浮动牵引构件,但需要一个刚性搭接构件。 根据本发明,通过连接在牵引构件控制机构和用作工具主框架的轮式承载结构的曲柄轴之间的联动来实现。 联动装置被布置成使得当主框架处于其下降或操作模式时,从联结构件控制器中可以清除挡块,使得搭接构件具有围绕横向轴线的自由枢转运动,但是当框架被升高以运输时 或升起模式,止挡件接合连接构件控制并使挂钩构件与框架刚性。