Internally mounted drive mechanism for a belt-winding drum

An internally mountable drive mechanism for a rotary drum having an internal cylindrical cavity for accommodating the drive mechanism, said cavity having a peripheral wall and an access opening at one end of the drum, the drive mechanism including a gearbox having a housing adapted to fit the cavity, ring-like mounting flange means on the gearbox housing having an outside diameter substantially conforming to the diameter of said wall, fastener means for releasably attaching the flange means to the wall of the cavity in predetermined axial position, the fastener means comprising circumferentially spaced fasteners extending radially into the flange means through oversize apertures in the drum, a motor for driving the gearbox in a manner to rotate the gearbox housing and thereby apply torque to the drum through said mounting flange means, and a motor mounting assembly for mounting the motor in driving position in the cavity adjacent an end of the gearbox facing said access opening and for supporting the motor from an anchor means externally of the drum adjacent said one end thereof, wherein the motor mounting assembly comprises a motor mounting flange for locating the motor adjacent said end of the gearbox, attachment means between the motor and said flange, a reactor tube, second fastener means for releasably securing an inner end of the reactor tube to the motor mounting flange, and further attachment means between an outer end of the reactor tube and said anchor means.

A rotary belt-winding, belt-driving or like drum having an internal cavity with a peripheral wall, a first access opening at one end of the drum, a further access opening at the other end of the drum, a drive mechanism within the cavity for rotating the drum, the drive mechanism comprising a motor and gearbox assembly, the gearbox having a housing adapted to be rotated by the motor for applying torque to the drum, mounting flange means on the gearbox housing, first releasable fastener means extending radially through the drum securing the mounting flange means to the drum, a motor mounting flange adjacent one end of the gearbox housing facing the first access opening, the flange locating the motor in a gearbox driving position, a first reactor tube supporting the motor mounting flange, the reactor tube extending out of the drum through the first access opening for attachment to a first anchor means adjacent said one end of the drum, a bearing assembly for the other end of the drum, the bearing assembly including a dummy gearbox within said cavity, the dummy gearbox having a housing, a shaft and bearings between the housing and shaft, further mounting flange means on the housing of the dummy gearbox, further releasable fastener means extending radially through the drum securing the further mounting flange means to the drum, mounting bracket means in the cavity for the shaft of the dummy gearbox, a further reactor tube extending into the cavity from said second access opening for supporting the mounting bracket means, and second anchor means outside the other end of the drum for supporting the further reactor tube.