| 主权项 |
1. A side brush assembly mechanism for a floor surface maintenance machine comprising:
a brush deck carrying a floor-engaging brush; a linkage assembly supporting the brush deck above the floor surface; a pivot assembly connected to a machine frame and adapted to rotate the brush deck and linkage assembly about a pivot pin, said pivot pin being generally vertical relative to the floor surface, with the pivot assembly adapted to swing the brush deck about the pivot pin either toward or away from a machine centerline; a cable connected at one end to the linkage assembly; a downforce spring connected at one end to a link of the linkage assembly, said downforce spring for biasing the brush deck downwardly toward the floor surface; and a selectively controlled cable tensioning device attached to a machine frame away from the linkage assembly and the pivot assembly, said cable tensioning device for retracting the cable during use of the machine to both raise and retract the brush deck, wherein upon activation by an operator the cable tensioning device provides a tension force on the cable tending to both lift the brush deck away from the floor surface and swing the brush deck about the pivot pin toward the machine centerline and extend the downforce spring, and when the tension force is decreased the brush deck swings about the pivot pin away from the machine centerline and lowers into contact with the floor surface and the downforce spring retracts causing the linkage assembly to pivot the brush deck toward the floor surface. |
