Elevator drive machine placed in the counterweight
AssigneeKone Corporation
InventorHarri Hakala
Life of this patent
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Abstract
A rotating elevator motor provided with a traction sheave is placed in the counterweight of an elevator suspended from ropes. The sector-shaped stator of the motor has a diameter (2*Rs) larger than that (2*Rv) of the traction sheave and the elevator ropes are passed through the open part or parts of the stator. This structure allows the use of traction sheaves of dif ferent diameters with rotors of the same diameter. Still, the length of the motor remains small and the motor/counterweight of the invention can be accommodated in the space normally reserved for a counterweight in an elevator shaft. The motor shaft is placed in the counterweight substantially midway between the guide rails and the same number of ropes are placed on both sides of the rotor.
Claims23
Counterweight of a rope-suspended elevator movable along guide rails and an elevator motor placed at least partially inside the counterweight, said motor comprising a traction sheave, a bearing, a shaft, an element supporting the bearing, a stator provided with a winding and a rotating disc-shaped rotor, the element supporting the stator of the elevator motor forming a structural part in common with the counterweight, said element forming a frame of the counterweight.
Counterweight of a rope-suspended elevator movable along guide rails and an elevator motor placed at least partially inside the counterweight, said motor comprising a traction sheave, a bearing, a shaft, an element supporting the bearing, a stator provided with a winding and a rotating disc-shaped rotor, a diameter (2*Rs) of the stator of the motor being larger than a diameter (2*Rv) of the traction sheave, the stator forming a generally circular sector and the elevator ropes passing between sides of the circular sector.
Counterweight of a rope-suspended elevator movable along guide rails and an elevator motor placed at least partially inside the counterweight, said motor comprising a traction sheave, a bearing, a shaft, an element supporting the bearing, a stator provided with a winding and a rotating disc-shaped rotor, a diameter (2*Rs) of the stator of the motor being larger than a diameter (2*Rv) of the traction sheave, the rotor of the elevator motor is a disc-shaped rotor provided with a bearing, said motor having between the rotor provided with a rotor winding and the stator provided with a stator winding an air gap, the air gap being substantially perpendicular to the shaft of the motor, the rotor of said motor being provided with at least one traction sheave attached to the rotor in the area between the rotor winding and the shaft.
Dependencies are inferred from the claim text.