Traction geared machine for elevator
AssigneeOtis Elevator Company
InventorsBenjamin J. Watson, Piech Zbigniew
Life of this patent
Estimating the term…
Abstract
A machine assembly for use in an elevator system is provided including a drive sheave (52) configured to rotate about a first axis of rotation (R). A first roller shaft (54) is configured to rotate about a second axis of rotation (S) substantially parallel to the first axis of rotation. Rotation of the first roller shaft about the second axis of rotation is configured to rotate the drive sheave about the first axis of rotation. A first motor is operably coupled to the first roller shaft and is configured to rotate the first roller shaft about the second axis of rotation.
Claims13
A machine assembly for use in an elevator system, comprising:
- a drive sheave having a plurality of grooves formed in an exterior surface of the drive sheave for receiving a plurality of tension members, the drive sheave being configured to rotate about a first axis of rotation;
- a first roller shaft configured to rotate about a second axis of rotation substantially parallel to the first axis of rotation, wherein rotation of the first roller shaft about the second axis of rotation is configured to rotate the drive sheave about the first axis of rotation, at least a portion of the first roller shaft being arranged in contact with the exterior surface of the drive sheave;
- a second roller shaft operably coupled to the drive sheave, the second roller shaft being configured to rotate about a third axis of rotation substantially parallel to the first axis of rotation and the second axis of rotation, wherein the second roller shaft is passively rotated about the third axis by one of the drive sheave and the first roller shaft;
- and
- a first motor operably coupled to the first roller shaft and configured to rotate the first roller shaft about the second axis of rotation.
An elevator system, comprising:
- a hoistway having a machine room arranged at a first end;
- a car coupled with at least one car guide rail for movement in the hoistway;
- a counterweight coupled with at least one counterweight guide rail for movement in the hoistway;
- at least one traction member operably coupled to the car and to the counterweight;
- and
- a machine assembly configured to move the elevator car within the hoistway, the machine assembly including:
- a drive sheave configured to rotate about a first axis of rotation, the drive sheave having at least one groove formed in an exterior surface of the drive sheave, the at least one traction member being arranged within the at least one groove;
- a first roller shaft configured to rotate about a second axis of rotation substantially parallel to the first axis of rotation, wherein rotation of the first roller shaft about the second axis of rotation is configured to rotate the drive sheave about the first axis of rotation, at least a portion of the first roller shaft being arranged in contact with the exterior surface of the drive sheave;
- a second roller shaft operably coupled to the drive sheave, the second roller shaft being configured to rotate about a third axis of rotation substantially parallel to the first axis of rotation and the second axis of rotation, wherein the second roller shaft is passively rotated about the third axis by one of the drive sheave and the first roller shaft;
- and
- a first motor operably coupled to the first roller shaft and configured to rotate the first roller shaft about the second axis of rotation.
Dependencies are inferred from the claim text.