Drive and support for mixer drum

An improved drive for a tiltable rotating mixing drum for mixing concrete batch materials or the like comprising:

• a rotatable mixing drum comprising a relatively flat rear conical charging zone having a central opening for receiving materials to be mixed from a charging chute, a front conical zone having a central discharge opening therein for discharging mixed materials and a generally cylindrical central zone disposed between said front and said rear conical zones;
• support means for supporting said mixing drum for rotation about its longitudinal axis;
• and
• drum drive means for causing and controlling the rotation of the drum about its longitudinal axis, said drum drive means further comprising a dual-tooth ring drive gear fixed to said drum and circumscribing said front conical zone having a pair of spaced parallel rows of teeth wherein the teeth of said two spaced rows are offset from each other and wherein said ring gear is adapted to be addressed by at least one pair of drive gears attached to the shaft of a proximately mounted electric motor.

An improved drive for a tiltable rotating mixing drum for mixing concrete batch materials or the like comprising:

• a rotatable mixing drum comprising a relatively flat rear conical charging zone having a central opening for receiving materials to be mixed from a charging chute, a front conical zone having a central discharge opening therein for discharging mixed materials and a generally cylindrical central zone disposed between said front and said rear conical zones;
• support means for supporting said mixing drum for rotation about its longitudinal axis, said drum support means further comprising a pair of boggy rollers disposed beneath the generally cylindrical central zone of said mixinq drum wherein each of said boggy rollers comprises a pair of rollers suitably journalled in rotatable fashion, mounted on a support means to thereby distribute the weight of said drum, said drum further being provided with a circumferential race in which said boggy rollers are adapted to ride during the rotation of said drum;
• drum tilting means for causing said drum to pivot from the horizontal mixing position to a discharge position, said tilting means further comprising rotating torque tube support means providing the pivot axis for the drum during the pivoting function, and tilt actuating means for tilting said drum;
• and
• drum drive means for causing and controlling the rotation of the drum about its longitudinal axis, said drum drive means further comprising a dual-tooth ring gear fixed to said drum and circumscribing said front conical zone having a pair of spaced parallel rows of teeth wherein the teeth of said two spaced rows are offset from each other and wherein said ring gear is adapted to be addressed by at least one pair of drive gears attached to the shaft of a proximately mounted electric motor.