ARRANGEMENT OF ELEVATOR MACHINES

• US 20110315487A1
• Filed: 03/16/2009
• Published: 12/29/2011
• Est. Priority Date: 03/16/2009
• Status: Abandoned Application

• Current Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Original Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Inventors: Fargo, Richard N.
• Application Number:
  US13/144,733
• Publication Number:
  US 20110315487A1
• Time in Patent Office: Days
• US Class Current: 187/258
• CPC Class Codes: B66B 11/004 in the machine room
• CPC Class Codes: B66B 11/0484 with a clutch or a coupling system between several motors, e.g. switching different speeds, progressive starting, torque limitation, flywheel control B66B1/28

Abstract

A drive (50) for a gearless elevator (10) includes a first drive machine (52) with a first sheave having a first axis of rotation, the first sheave to receive a first set of ropes (20A) attached to the elevator car (12), and a second drive machine (54) having a second sheave having a second axis of rotation, the second sheave to receive a second set of ropes (20B) attached to the elevator car (12). The first axis of rotation and the second axis of rotation are parallel, and have a distance therebetween.

Claims

1. A drive for an elevator, the drive comprising:

a first drive machine having a first sheave to receive a first set of ropes that attach to an elevator car, the first sheave having a first axis of rotation; and

a second drive machine having a second sheave to receive a second set of ropes that attach to the elevator car, the second sheave having a second axis of rotation;

wherein the first axis of rotation and the second axis of rotation are parallel and have a distance therebetween.

2. The drive of claim 1 wherein the first drive machine is separated from the second drive machine by a support structure.

3. The drive of claim 1 further comprising:

a deflector sheave that aligns the first set of ropes and second set of ropes with respect to the elevator car.

4. The drive of claim 1 wherein the first drive machine and second drive machine are configured in a master/slave relationship.

5. The drive of claim 1, wherein the first drive machine is vertically spaced from the second drive machine.

6. An elevator system comprising:

an elevator car within a hoistway;

a counterweight;

a plurality of ropes connecting the elevator car and the counterweight; and

a drive apparatus comprising;

a first drive machine with a first sheave;

a second drive machine with a second sheave; and

a deflector sheave; and

wherein a first set of said plurality of ropes engage the first sheave, a second set of said plurality of ropes engage the second sheave, and all of said plurality of ropes engage said deflector sheave.

7. The elevator system of claim 6 wherein the first drive machine is located above the second drive machine.

8. The elevator system of claim 6 wherein a wrap angle of the first set of ropes is greater than a wrap angle of the second set of ropes.

9. The elevator system of claim 6 wherein the first set of ropes and the second set of ropes are symmetrically arranged around the deflector sheave.

10. The elevator system of claim 6 wherein the first drive machine and second drive machine are identical.

11. The elevator system of claim 6 wherein the first drive machine is separated from the second drive machine by a support structure.

12. The elevator system of claim 6 wherein the deflector sheave is located below the ceiling of the hoistway.

13. The elevator system of claim 6 wherein the first drive machine and the second drive machine are configured in a master/slave relationship.

14. The elevator system of claim 6 wherein the first drive machine and the second drive machine are mounted on the same support structure.

15. A drive for an elevator, the drive comprising:

a plurality of drive machines for driving an elevator car;

wherein each of the plurality of drive machines contain a sheave with an axis, each axis parallel to the rest of the sheave axes, and each axis of the plurality of machines is spaced from adjacent axes.

16. The drive of claim 15 wherein the plurality of drive machines are identical.

17. The drive of claim 16 wherein the plurality of drive machines are separated from each other by a support structure.

18. The drive of claim 16 further comprising:

a separate set of ropes wrapped around the sheaves of each of the plurality of machines.

19. The drive of claim 18 wherein the separate sets of ropes are symmetrically arranged around the deflector sheave.

20. The drive of claim 15 wherein the plurality of machines are configured in master/slave relationships.