Tire building machine
AssigneeNRM Corporation
InventorArmindo Cantarutti
Life of this patent
Estimating the term…
Abstract
Tire building machine includes a pair of carriages axially movable in unison toward and away from opposite ends of the tire building drum on which are mounted bead carriers for supporting tire beads radially outwardly of the drum ends. Suitable controls and adjustments are provided for moving the carriages symmetrically about the center line of the drum into precise positions for positioning the tire beads with precision over the ends of the drum and holding the tire beads in place during expansion of the drum. Pusher rings may also be provided on the carriages to assist in obtaining symmetrical movement of the ply turnup bladders for obtaining the same amount of stitching and turnup of the plies on both sides of the tire.
Claims15
In a tire building machine, an expandable tire building drum having tire bead carriers mounted for movement toward and away from opposite ends of said drum, means for expanding and contracting said drum, said tire bead carriers including means for supporting the tire beads radially outwardly of the drum ends when the drum is contracted, and means for synchronously moving said tire bead carriers symmetrically about the centerline of said drum to position the tire beads at the desired location over the ends of said drum and holding the tire beads in place during expansion of said drum, said means for synchronously moving said tire bead carriers symmetrically about the centerline of said drum comprising a pair of carriages for said tire bead carriers, means mounting said carriages for movement toward and away from opposite ends of said drum, a rack and pinion mechanism for synchronizing the movements of said carriages in opposite directions, and control means for moving said carriages to the desired extent for positioning the tire beads at the desired location over the ends of said drum and holding the tire beads in place during expansion of said drum as aforesaid, said rack and pinion mechanism comprising a stationary housing located intermediate said carriages, a pinion rotatably mounted in said housing, and a pair of racks engaging opposite sides of said pinion, one of said racks being connected to one of said carriages and the other of said racks being connected to the other of said carriages for causing said carriages to move axially toward and away from each other to the same extent, one of said carriages being part of an inboard assembly at one end of said drum and the other of said carriages being part of an outboard assembly at the other end of said drum, means providing a releasable connection between said other carriage and its associated rack, and means for moving said other carriage toward and away from the adjacent end of said drum when said other carriage is disconnected from its associated rack to permit placement of the tire beads on said tire bead carriers and removal of the finished tire carcass from said tire building drum, said means providing a releasable connection between said other carriage and its associated rack comprising a yoke on said other carriage for receipt of a reduced end portion on its associated rack, a roller extending between the arms of said yoke for engaging the bottom surface of said reduced end portion, an aperture in said reduced end portion, and a pin on said carriage movable into and out of said aperture in said reduced end portion for locking and releasing said other carriage from its associated rack.
In a tire building machine, an expandable tire building drum having tire bead carriers mounted for movement toward and away from opposite ends of said drum, means for expanding and contracting said drum, said tire bead carriers including means for supporting the tire beads radially outwardly of the drum ends when the drum is contracted, and means for synchronously moving said tire bead carriers symmetrically about the centerline of said drum to position the tire beads at the desired location over the ends of said drum and holding the tire beads in place during expansion of said drum, and mechanical stop means provided on one of said carriages for limiting inward movement of said carriages for accurate bead set, said mechanical stop means comprising at least one longitudinally extending rod having its inner end attached to said tire bead carrier of said one carriage, adjustable stop nut means threaded onto the outer end of said rod, and gate means mounted for movement into and out of the path of said stop nut means for limiting axial inward movement of said carriages to the bead setting position upon engagement of said stop nut means with said gate means.
In a tire building machine, an expandable tire building drum having tire bead carriers mounted for movement toward and away from opposite ends of said drum, means for expanding and contracting said drum, said tire bead carriers including means for supporting the tire beads radially outwardly of the drum ends when the drum is contracted, and means for synchronously moving said tire bead carriers symmetrically about the centerline of said drum to position the tire beads at the desired location over the ends of said drum and holding the tire beads in place during expansion of said drum, said means for synchronously moving said tire bead carriers symmetrically about the centerline of said drum comprising a pair of carriages for said tire bead carriers, means mounting said carriages for movement toward and away from opposite ends of said drum, a rack and pinion mechanism for synchronizing the movements of said carriages in opposite directions, and control means for moving said carriages to the desired extent for positioning the tire beads at the desired location over the ends of said drum and holding the tire beads in place during expansion of said drum as aforesaid, said rack and pinion mechanism comprising a stationary housing located intermediate said carriages, a pinion rotatably mounted in said housing, and a pair of racks engaging opposite sides of said pinion, one of said racks being connected to one of said carriages and the other of said racks being connected to the other of said carriages for causing said carriages to move axially toward and away from each other to the same extent, and means for moving said housing laterally with respect to the centerline of said carriages to insure proper axial alignment of said pinion therewith, said means for moving said housing laterally with respect to the centerline of said carriages comprising rotatable pins adjacent each side of said housing having eccentrics thereon, said eccentrics being received in bushings carried by mounting plates extending into slots in said housing, whereby rotation of said pins causes said eccentrics to rotate, forcing said housing laterally as aforesaid.
Dependencies are inferred from the claim text.