초록 ▼

A cotton picker doffer element adjustment mechanism which continuously and automatically adjusts the elevation of the doffer elements in relationship with the picker spindles as the doffer pads wear. The doffer elements continuously gravitate downwardly to maintain contact between the doffer pads an

A cotton picker doffer element adjustment mechanism which continuously and automatically adjusts the elevation of the doffer elements in relationship with the picker spindles as the doffer pads wear. The doffer elements continuously gravitate downwardly to maintain contact between the doffer pads and the picker spindles. A hydraulic fluid arrangement is provided to automatically prevent upward movement of the doffer elements. A manually operable device may be provided to selectively exert additional pressure over gravity to the doffer elements or to permit gravity to be overridden. An external pressure source may be provided to supplement the downward gravitation of the doffer elements.

대표청구항 ▼

In a cotton picker doffer assembly including picker spindles and a doffer element having doffer pads positioned adjacent to said spindles for removing cotton therefrom, an adjustment mechanism for adjusting the vertical relationship of said doffer element relative to said picker spindles, comprising

In a cotton picker doffer assembly including picker spindles and a doffer element having doffer pads positioned adjacent to said spindles for removing cotton therefrom, an adjustment mechanism for adjusting the vertical relationship of said doffer element relative to said picker spindles, comprising: a substantially vertical shaft about which said doffer element is attached; means for rotating said shaft which permits said shaft to gravitate downwardly such that as said doffer pads wear they are maintained in continuous contact with said picker spindles; and means for continuously preventing upward movement of said shaft as said shaft gravitates downwardly so as to maintain said doffer pads in contact with said picker spindles, comprising hydraulic piston means operatively connected with said vertical shaft, said piston means being movably positioned in hydraulic cylinder means and defining therewith a cavity of variable volume having a substantially incompressible fluid therein, said piston means being movably in response to downward gravitational movement of said vertical shaft to increase the volume of said fluid in said cavity with the increased volume of the fluid in said cavity acting to prevent reverse movement of said pisston means so that said piston means prevents upward movement of said vertical shaft.