Patent ID: 7437971

Claim:
A drive arrangement, the arrangement having a module which includes a motor, a driven wheel mounted, in use, for rotation within the module and drivable, in use, by the motor, and clutch means operable between the motor and the wheel, and wherein the motor drives a drive wheel, and the module has a belt around the drive wheel and the driven wheel, and the clutch means serves to movably mount the motor and the drive wheel relative to the driven wheel, so that the drive wheel is movable relative to the driven wheel to increase the separation of the rotation axes of the said wheels, and to releasably tighten the belt until the belt tightens to convey drive from the drive wheel to the driven wheel, and wherein the drive wheel is releasable to decrease the separation of the rotation axes of the said wheels and to disengage drive from the drive wheel to the driven wheel, through the belt, the module further comprising brace means, wherein the module is installable as a single unit to a target installation having a shaft to be driven by the arrangement, and is removable as a single unit from the target installation, the module being installable to drivingly engage the shaft of the target installation, and wherein the brace means is attachable, when the module is installed, to a member which is fixed relative to the rotation axis of the driven wheel, to brace the module against turning as the driven wheel is driving the shaft, during use, and wherein the module comprises a base assembly, and a bearing assembly by which the driven wheel is mounted on the base assembly, whereby the module is carried by the shaft by means of the driven wheel being fixed for rotation with the shaft.