Importance

Loading Importance Indicators...

Abstract

A mower drive mechanism including a clutch-brake assembly, a travel control and neutral lift-off assembly, and a traction sensor assembly for a friction disc transmission having a driven disc engageable with a drive disc. The clutch-brake assembly includes a rockshaft, bellcrank actuator asssembly, and swing plate for raising the driven disc of the friction disc transmission when the rockshaft rotates a predetermined amount. Further rotation of the rockshaft causes a brake arm to come into engagement with a brake hub on the drive shaft for the driven disc thereby effecting a braking action. Also, a spring force is applied to the rockshaft which is transmitted through the bellcrank actuator assembly to the swing plate for biasing the driven disc toward the drive disc in a driving mode. The travel control and neutral lift-off assembly includes a rotatable control member for causing the driven disc to be moved linearly along its drive shaft to a desired speed and direction of rotation setting. The rotatable control member is also connected to a neutral cam member, and when the driven disc is positioned at a neutral speed or directional setting, the neutral cam member raises the swing plate thereby raising the driven disc above the drive disc. Finally, the traction sensor assembly includes an idler sprocket which senses increases in the tension in the final drive chain due to increased load. As the chain tension increases, additional traction force is applied between the driven disc and drive disc by a linkage connected between the idler sprocket and bellcrank actuator assembly.

Loading the Abstract Image...

First Claim