Load dependent acting brake for conveyor devices

Claim 2

A load dependent acting brake for a conveyor device, comprising a drive shaft provided for the conveyor device, a brake disk secured to said drive shaft of said conveyor device, brake lever means cooperating with said brake disk, at least one brake jaw mounted at said brake lever means, said brake jaw incluDing a brake clamp, a brake rod cooperating with said brake lever means, a fixed bearing in which the brake rod is displaceably guided, a brake wedge secured to an end of the brake rod, brake spring means operatively engaging at the brake wedge and bearing against said fixed bearing, said brake spring means exerting a force upon said brake wedge secured to the brake rod for pressing said brake jaw against said brake disk, a brake vent device operatively connected with said brake rod, said brake jaw being in operative co-action by means of said brake rod with said brake vent device, said brake vent device in its switched-in state for venting the brake retracting the brake rod against the action of said brake spring means and said brake vent device in its switched-off state pressing the brake lever means and said brake jaw through the action of the force applied by the brake spring means upon the brake wedge of the brake rod into a brake closing position, a mechanically acting deceleration feeler device effective at the brake lever means, an adjustment lever rotatably mounted at the fixed bearing and cooperating with said brake rod, a disk secured to said brake rod, a prestressed pressure spring disposed between the fixed bearing and the brake vent device, said prestressed pressure spring bearing at said disk secured to the brake and exerting a force upon the adjustment lever, said adjustment lever acting by means of said prestressed pressure spring upon said brake rod, said mechanically acting deceleration feeler device cooperating with said adjustment lever in order to move said adjustment lever through a path substantially proportional to the deceleration occuring at the drive shaft of the conveyor device in the sense of reducing the braking force exerted by the brake jaw upon the brake disk.

Claim 3

A load dependent acting brake for a conveyor device, comprising a drive shaft provided for the conveyor device, a brake disk secured to said drive shaft of said conveyor device, brake lever means cooperating with said brake disk, at least one brake jaw mounted at said brake lever means, brake spring means for exerting a force upon said brake lever means for pressing said brake jaw against said brake disk, a brake rod cooperating with said brake lever means, a brake vent device operatively connected with said brake rod, said brake jaw being in operative co-action by means of said brake rod with said brake vent device, said brake vent device in its switched-in state for venting the brake exerting a pneumatic force upon the brake lever means by means of the brake rod which opposes the direction of the force applied by said brake spring means and said brake vent device in its switched-off state pressing the brake lever means through the action of the force applied by the brake spring means into a brake closing position, a mechanically acting deceleration feeler device effective at said brake lever means, an adjustment lever positioned to cooperate with said mechanically acting deceleration feeler device and said brake rod, a prestressed pressure spring provided for said adjustment lever, said adjustment lever acting by means of said prestressed pressure spring upon said brake rod, said mechanically acting deceleration feeler device comprising a flywheel mounted to be freely movable and axially displaceable at the end of said drive shaft, said flywheel having a hub extending towards said end of the drive shaft, a pressure hood mounted at said hub, said pressure hood actuating the adjustment lever but not rotating along with the flywheel but axially displaceable therewith, at least one pressure roller mounted at the flywheel at a side thereof confronting the brake disk, adjustment cam means arranged at the brake disk and cooperating with said pressure roller, said pressure roller being pressed under the action of the prestress force of the pressure spring transmitted from the adjustment lever to the flywheel against said adjustment cam means and converting rotation of the flywheel and brake dIsk into an axial displacement of the flywheel, said axial displacement of the flywheel causing said flywheel to act upon said adjustment lever to move said adjustment lever through a path substantially proportional to the deceleration occurring at the drive shaft of the conveyor device in the sense of reducing the braking force exerted by the brake jaw upon the brake disk.

Claim 4

A load dependent acting brake for a conveyor device, comprising a drive shaft provided for the conveyor device, a brake disk secured to said drive shaft of said conveyor device, brake lever means cooperating with said brake disk, at least one brake jaw mounted at said brake lever means, brake spring means for exerting a force upon said brake lever means for pressing said brake jaw against said brake disk, a brake rod cooperating with said brake lever means, a brake vent device operatively connected with said brake rod, said brake jaw being in operative co-action by means of said brake rod with said brake vent device, said brake vent device in its switched-in state for venting the brake exerting a pneumatic force upon the brake lever means by means of the brake rod which opposes the direction of the force applied by said brake spring means and said brake vent device in its switched-off state pressing the brake lever means through the action of the force applied by the brake spring means into a brake closing position, a mechanically acting deceleration feeler device effective at said brake lever means, an adjustment lever positioned to cooperate with said mechanically acting deceleration feeler device and said brake rod, a prestressed pressure spring provided for said adjustment lever, said adjustment lever acting by means of said prestressed pressure spring upon said brake rod, said mechanically acting deceleration feeler device comprising a flywheel mounted to be freely movable and axially displaceable at the end of said drive shaft, said flywheel having a hub extending towards said end of the drive shaft, a pressure hood mounted at said hub, said pressure hood actuating the adjustment lever but not rotating along with the flywheel but axially displaceable therewith, at least one pressure roller mounted at the flywheel at a side thereof confronting the brake disk, adjustment cam means arranged at the brake disk and cooperating with said pressure roller, said pressure roller being pressed under the action of the prestress force of the pressure spring transmitted from the adjustment lever to the flywheel against said adjustment cam means and converting rotation of the flywheel and brake dIsk into an axial displacement of the flywheel, said axial displacement of the flywheel causing said flywheel to act upon said adjustment lever to move said adjustment lever through a path substantially proportional to the deceleration occurring at the drive shaft of the conveyor device in the sense of reducing the braking force exerted by the brake jaw upon the brake disk.