Rope wheel assembly, compensator and elevator arrangement

Patent metadata

Field	Value
Publication number	US-10556777-B2
Application number	US-201816117226-A
Country	US
Kind code	B2
Filing date	Aug 30, 2018
Priority date	Oct 11, 2017
Publication date	Feb 11, 2020
Grant date	Feb 11, 2020

Abstract

A rope wheel assembly of an elevator includes a frame, a plurality of rope wheels for guiding ropes of the elevator, and a plurality of bearings. The rope wheels are mounted coaxially on the frame such that they are rotatable relative to the frame as well as relative to each other. The rope wheel assembly includes a central shaft passing through the rope wheels, which central shaft is non-rotatable relative to the frame, and the rope wheel assembly includes a hollow cylinder surrounding the central shaft, the hollow cylinder being mounted on the central shaft rotatably relative to the central shaft, each said rope wheel being mounted on the cylinder rotatably relative to the cylinder. The rope wheel assembly includes a bearing axially between rope wheels that are next to each other via which bearing they are supported on each other in axial direction. A compensator and an elevator arrangement implementing the rope wheel assembly are also disclosed.

First claim

The invention claimed is:

1. A rope wheel assembly of an elevator, comprising:
a frame;
a plurality of rope wheels for guiding ropes of the elevator; and
bearings, wherein the plurality of rope wheels are mounted coaxially on the frame such that the plurality of rope wheels are rotatable relative to the frame as well as relative to each other;
a central shaft passing through said plurality of rope wheels, the central shaft being non-rotatable relative to the frame;
a hollow cylinder surrounding the central shaft, the hollow cylinder being mounted on the central shaft rotatably relative to the central shaft, each of said plurality of rope wheels being mounted on the cylinder rotatably relative to the cylinder, said bearings including at least one radial bearing arranged between the plurality of rope wheel and the cylinder; and
an axial ball bearing in an axial direction between the rope wheels that are next to each other, said rope wheels that are next to each other being supported on each other in the axial direction via said axial bearing,
wherein the rope wheels next to each other comprise annular bearing grooves on axial sides thereof that are facing each other for accommodating the axial bearing, and the axial bearing is positioned radially outward of the radial bearing in its entirety with a radial distance from the radial bearing, and lubricant is contained within said radial distance between the rope wheels next to each other.

2. The rope wheel assembly according to claim 1 , wherein the rope wheel assembly comprises gap between the rope wheels that are next to each other, and an annular seal in the gap for blocking substances passing in the gap in a radial direction.

3. The rope wheel assembly according to claim 2 , wherein the seal is positioned in the radial direction on an outer side of the axial bearing.

4. The rope wheel assembly according to claim 2 , wherein the seal is positioned in the radial direction on an outer side of the axial bearing and closer to the axial bearing than outer rims of the rope wheels that are next to each other.

5. The rope wheel assembly according to claim 2 , wherein the rope wheel assembly comprises the lubricant in the radial direction on an inner side of the seal.

6. The rope wheel assembly according to claim 5 , wherein the lubricant is arranged to lubricate the axial bearing.

7. The rope wheel assembly according to claim 5 , wherein the seal is suitable for blocking the lubricant from passing radially outwards in the gap.

8. The rope wheel assembly according to claim 2 , wherein the seal is suitable for blocking dirt and/or water from passing radially inwards in the gap.

9. The rope wheel assembly according to claim 2 , wherein the axial sides of the seal extend into annular seal grooves of the rope wheels next to each other.

10. The rope wheel assembly according to claim 9 , wherein each of the rope wheels next to each other comprise a rope wheel body, and said annular seal grooves and/or said annular bearing grooves are delimited by the body.

11. The rope wheel assembly according to claim 9 , wherein each of the rope wheels next to each other comprise a rope wheel body, and the body comprises a hub, and said annular seal grooves and/or said annular bearing grooves are formed in the hub.

12. The rope wheel assembly according to claim 1 , wherein the axial bearing is a rolling element bearing.

13. The rope wheel assembly according to claim 12 , wherein the rolling elements are placed in the annular bearing grooves and are in direct contact with the annular bearing grooves.

14. The rope wheel assembly according to claim 12 , wherein the rolling elements are arranged between rope wheels next to each other in a circular array surrounding the cylinder, and the diameter of the circular array is more than 15 times the diameter of the rolling bearing elements.

15. The rope wheel assembly according to claim 1 , wherein the rope wheel assembly comprises an adjusting means mounted on the cylinder for adjusting axial position of the rope wheels relative to the cylinder.

16. The rope wheel assembly according to claim 1 , wherein said at least one radial bearing is a sliding contact bearing.

17. The rope wheel assembly according to claim 1 , wherein the rope wheel assembly comprises at least one bearing radially between the shaft and the cylinder, said at least one bearing being a rolling element bearing.

18. A compensator of an elevator, comprising the rope wheel assembly according to claim 1 .

19. An arrangement for guiding belt-shaped ropes of an elevator, the arrangement comprising:
a plurality of ropes; and
the compensator according to claim 18 .

20. An arrangement for guiding belt-shaped ropes of an elevator, the arrangement comprising:
a plurality of ropes; and
the rope wheel assembly according to claim 1 .

Assignees

• Kone Corp

Inventors

• Salmi Markus

Classifications

• B66B7/10

  for equalising rope or cable tension · CPC title

• B66B15/02 Primary

  Rope or cable carriers · CPC title

• B66B9/00

  Kinds or types of lifts in, or associated with, buildings or other structures (characterised by control systems B66B1/00; apparatus for raising or lowering persons on stages of theatres A63J5/12) · CPC title

• F16C19/14

  for both radial and axial load · CPC title

• B66B7/1253

  Lubricating means · CPC title