Castering wheel locking for implement lift system

摘要

A lift support system for a wheel assembly that provides variable support for the wing frame section of a tillage implement above the soil. The lift support system includes a vertically oriented tube slidably connected to the wing frame section for movement along a vertical axis. A wheel axle assembly is pivotally connected to the lower end of the tube and provides a support for the axle assembly. Wheels are journaled on the axle assemblies. A locking assembly selectively locks the wheel assembly in place when the tube is in a position for field transport and field operation with the locking mechanism being disengageable when the wing section is in a transport position to permit castoring of the wheel assemblies.

主权项

1. A tillage implement comprising:
a main frame section including a pull hitch tube extending in a travel direction; at least one wing frame section pivotally connected to said mainframe section between a field position in which said wing frame is transverse to the travel direction and a transport position in which said wing frame is parallel to said travel direction; wheel assemblies for variably positioning said mainframe section above the soil and oriented to enable rolling movement in the travel direction; and at least one wheel assembly for variably positioning at least one wing frame section above the soil between a field position in which said wheel assembly is locked to permit movement only in the travel direction and a transport position in which said wheel assembly castors to support said at least one wing frame section, said wheel assembly including an axle for journaling at least one wheel, said axle assembly being pivotally connected to a vertically extending tube which is vertically displaceable relative to said at least one wing frame section; said tillage implement further comprising a bar having a U-shaped section and displaceable between a position in which the U-shaped section is free of said axle assembly for permitting castoring movement and a second position in which the U-shaped section embraces and prevents pivoting movement.