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US 11,584,621 B2Granted
Autonomous elevator car movers and traction surfaces therefor, configured with traction increasing and guidance enhancing implements
AssigneeOtis Elevator Company
InventorsKiron Bhaskar, Sam Thieu Wong, Brad Guilani
Life of this patent
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Abstract
Disclosed is a ropeless elevator system having: a car mover operationally connected to an elevator car, the car mover configured to move along a car mover track in a hoistway lane, thereby moving the elevator car along the hoistway lane, wherein the car mover has a first tire of a first wheel that is configured to engage the car mover track when the car mover moves along the car mover track, wherein one or more of the first tire and the car mover track has an engagement feature for increasing traction between the first tire and the car mover track.
Claims13
A ropeless elevator system comprising:
- a car mover operationally connected to an elevator car, the car mover configured to move along a car mover track in a hoistway lane, thereby moving the elevator car along the hoistway lane,
- wherein the car mover includes a first tire of a first wheel that is configured to engage the car mover track when the car mover moves along the car mover track, wherein one or more of the first tire and the car mover track includes an engagement feature for increasing traction between the first tire and the car mover track,
- wherein:
- the first tire includes the engagement feature, wherein the engagement feature includes a first coil winding configured for being powered to provide one or more of heat and magnetic flux;
- the first tire engages a first side of the car mover track;
- and
- the car mover includes a second tire of a second wheel that engages a second side of the car mover track, wherein the second tire includes a second tire coil winding configured for being powered to provide magnetic flux so that the first tire and the second tire are either attracted toward or repelled away from each other.
4 more elements
A ropeless elevator system comprising:
- a car mover operationally connected to an elevator car, the car mover configured to move along a car mover track in a hoistway lane, thereby moving the elevator car along the hoistway lane,
- wherein the car mover includes a first tire of a first wheel that is configured to engage the car mover track when the car mover moves along the car mover track, wherein one or more of the first tire and the car mover track includes an engagement feature for increasing traction between the first tire and the car mover track,
- wherein:
- the car mover track includes a track engagement feature that is configured to enhance one or more of traction and guidance when engaged by the first tire;
- and
- the track engagement feature is one or more of:
- a track cross section of the car mover track that forms a diamond profile or a circular profile;
- and a track web cross section of the car mover track that forms a convex profile, a concave profile, or a semi-circular profile on one side or both sides of the of the car mover track.
5 more elements
A ropeless elevator system comprising:
- a car mover operationally connected to an elevator car, the car mover configured to move along a car mover track in a hoistway lane, thereby moving the elevator car along the hoistway lane,
- wherein the car mover includes a first tire of a first wheel that is configured to engage the car mover track when the car mover moves along the car mover track, wherein one or more of the first tire and the car mover track includes an engagement feature for increasing traction between the first tire and the car mover track,
- wherein:
- the first tire includes a tire engagement feature and the car mover track includes a track engagement feature, wherein the tire engagement feature and the track engagement feature are located and shaped to complement each other and engage each other when the car mover moves along the car mover track;
- the tire engagement feature is one of protrusions and impressions formed circumferentially along an outer annular surface of the first tire;
- the track engagement feature is another of protrusions and impressions along the car mover track;
- and
- either:
- the tire engagement feature is axially centered or offset from an axial center of the first tire;
- or
- the tire engagement feature and the track engagement feature form a triangular waveform profile.
8 more elements
A method of operating a ropeless elevator system comprising:
- powering a first coil winding in a first tire of a first wheel of a car mover operationally connected to an elevator car, wherein the car mover configured to move along a car mover track in a hoistway lane, thereby moving the elevator car along the hoistway lane;
- and
- providing one or more of heat and magnetic flux from powering the first coil winding
- the first tire engaging a first side of the car mover track;
- and
- powering a second tire coil winding in a second tire of a second wheel of the car mover, the second tire engaging a second side of the car mover track, to provide magnetic flux so that the first tire and the second tire are selectively attracted toward and repelled away from each other.
3 more elements
Dependencies are inferred from the claim text.