EP2829498A1 - Treibscheibenanordnung - Google Patents

Treibscheibenanordnung Download PDF

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Publication number
EP2829498A1
EP2829498A1 EP13178202.1A EP13178202A EP2829498A1 EP 2829498 A1 EP2829498 A1 EP 2829498A1 EP 13178202 A EP13178202 A EP 13178202A EP 2829498 A1 EP2829498 A1 EP 2829498A1
Authority
EP
European Patent Office
Prior art keywords
traction sheave
electric motor
contact surface
rope
side walls
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13178202.1A
Other languages
English (en)
French (fr)
Inventor
Asmo Tenhunen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kone Corp
Original Assignee
Kone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kone Corp filed Critical Kone Corp
Priority to EP13178202.1A priority Critical patent/EP2829498A1/de
Publication of EP2829498A1 publication Critical patent/EP2829498A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B15/00—Main component parts of mining-hoist winding devices
    • B66B15/02—Rope or cable carriers
    • B66B15/04—Friction sheaves; "Koepe" pulleys

Definitions

  • the invention relates to lifting devices and more particularly a traction sheave arrangement for a lifting device.
  • At least one rope is used for lifting the elevator or other load.
  • these ropes are arranged such that they are operated by a motor that is connected to a traction sheave. In the most typical configurations a gear system is used between the motor and the traction sheave, however, also direct drive is possible.
  • the traction sheave rotates ropes move such that the elevator or other load is moved up or down.
  • an elevator car is in the other end of the rope and a counter weight in the other end. Because of opposing forces caused by the elevator car and counter weight the rope is tightened and forced against traction sheave.
  • the number of ropes may be regulated so that in passenger elevators more than one rope is typically used.
  • the friction of the traction sheave may be increased by using special purpose shapes in the groove of the traction sheave.
  • An example of a typical groove is V-shape, wherein the rope has contact surface on both sides. Furthermore, the contact surface may be hardened.
  • a person skilled in the art knows several different shapes and understands that they have benefits and drawbacks. For example, some shapes may be difficult to manufacture, require too much space, do not provide the best possible friction, have high rope deterioration and similar. Thus, the shape of the groove is always a compromise and the designing engineer must choose the shape according to the application. Examples of different shapes are disclosed, for example, in GB139735 .
  • Traction sheave elevators are operated with ropes arranged to grooves of a traction sheave.
  • the traction sheave is connected to a motor and the friction between grooves and ropes is high enough so that when the traction sheave rotates the elevator and counterweight move according to the rotation without slipping.
  • the friction in traction sheave may be improved by using specific shapes in the rope contact surface in grooves of the traction sheave.
  • the shape of the groove is divided into contact surface for increasing the friction, outer surface for securing the guidance of the rope and bottom of the groove.
  • a traction sheave for a lifting device comprises at least one groove for receiving a rope.
  • Each of the grooves of the traction sheave comprise a contact surface, wherein side walls of the contact surface are inclined in order to form opening angle such that when the traction sheave is in use a rope contacts the contact surface on both side walls.
  • Each of the grooves further comprise an outer surface, wherein side walls of the outer surface have an opening angle less than the opening angle of said side walls of said contact surface.
  • the traction sheave is attached to an electric motor that is configured to operate an elevator.
  • an elevator comprising the traction sheave of the embodiment described above is disclosed.
  • a benefit of the invention is that the traction sheave described above requires less space. Thus, it can be fitted to smaller space and the space can be used for other purposes.
  • a further benefit of the traction sheave described above is that the ropes can be arranged closer to the electric motor and the support. Thus, the ropes cause smaller forces when the traction sheave, or the axel attached to the traction sheave is supported only from the end attached to the motor. In other words, the traction sheave is thinner and/or the axial part or the axel attached to the traction sheave is shorter. Instead of thinner traction sheave the save space may be used for providing thicker walls between the grooves of the traction sheave. This makes the overall construction stronger and provides a construction that is easier to harden.
  • FIG 1 is an illustration of an example embodiment of the invention.
  • a traction sheave 10 with three grooves is disclosed.
  • the traction is connected to an electric motor 15 and supported by bearings 16 from the first end. It is noted that the support and the attachment between the traction sheave 10 and the electric motor 15 are examples only.
  • the traction sheave 10 of Figure 1 includes an integrated axel structure for attaching the traction sheave 10 to the electric motor 15. A person skilled in the art understands, that there may be other suitable means for attachment.
  • each of the grooves there is a contact surface 12.
  • the side walls of the contact surface are inclined in order to form opening angle such that when the traction sheave is in use, each of the ropes 14 contacts the contact surface 12 on both side walls of the respective groove.
  • the friction is high enough in order to prevent slipping of the rope and an elevator car and counter weight fixed to the ends of the rope move to opposite directions.
  • the traction sheave may comprise any number of grooves.
  • Each of the grooves further comprises an outer surface 13.
  • the side walls of the outer surface are inclined in order to form an opening angle less than the opening angle of said side walls of the contact surface.
  • the purpose of the outer surface is to guide the rope into the traction sheave so that it does not get displaced.
  • the distance between side walls of the outer surface is only slightly larger than the diameter of the rope used so that the rope can be easily placed on the contact surface.
  • outer surface may be inclined, however, it is not necessary.
  • the opening angle discussed above is the angle between, for example contact surfaces in the opposite sides of the groove.
  • a typical opening angle for contact surface is 40 - 50 degrees.
  • the contact surface opens in V-form.
  • the cross section of each of the side walls of the contact surface is typically straight so that the same opening angle is maintained through the contact area.
  • the opening angle of outer surface is smaller than the opening angle of contact surface.
  • the opening angle of side walls of the outer surface may be as small as zero degrees, in other words, the side walls may be forming a right-angle with the central axis of the traction sheave. Thus, there is an angle between side walls of the contact surface and outer surface.
  • Each of the grooves may further comprise a bottom surface 11.
  • the bottom surface may be inclined, flat, round or any other form, however.
  • the bottom surface is arranged such that the rope does not touch the bottom surface of the groove.
  • the contact surfaces extend so that the distance between them is 8,6mm.
  • the minimum distance between outer surfaces is in the example 8,6mm. If the opening angle is zero degrees this distance is maintained through outer surface. If the opening angle is, for example ten degrees, the distance increases slightly until the end of the outer surface.
  • Each of the grooves may be arranged next to each other so that the length of the axel is minimized and the side wall 17 between two grooves is thin.
  • a designing engineer may choose thicker wall when extended strength of the wall is desired. Both of these options are enabled by the fact that the outer surface has smaller opening angle than the contact surface and thus, space is saved for desired used.
  • the form of the top of the side wall may be chosen according to the need. For example, sharp edges may be rounded or chamfered in order to prevent unnecessary rope wearing.
  • the electric motor 15 in the embodiment is a conventional electric motor using electric magnets 18, wherein the traction sheave 10 comprises permanent magnets 19.
  • This operating method is an example and any other means for rotating traction sheave 10 may be used.
  • the support on bearings 16 may be constructed according to the need of the application.
  • a direct drive is used, however, between the motor and the traction sheave a gear box or other gear system may be used.

Landscapes

  • Cage And Drive Apparatuses For Elevators (AREA)
EP13178202.1A 2013-07-26 2013-07-26 Treibscheibenanordnung Withdrawn EP2829498A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13178202.1A EP2829498A1 (de) 2013-07-26 2013-07-26 Treibscheibenanordnung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13178202.1A EP2829498A1 (de) 2013-07-26 2013-07-26 Treibscheibenanordnung

Publications (1)

Publication Number Publication Date
EP2829498A1 true EP2829498A1 (de) 2015-01-28

Family

ID=48906108

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13178202.1A Withdrawn EP2829498A1 (de) 2013-07-26 2013-07-26 Treibscheibenanordnung

Country Status (1)

Country Link
EP (1) EP2829498A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10941021B2 (en) 2017-08-28 2021-03-09 Otis Elevator Company Sheave for belt with profile tracking features

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE138813C (de) *
DE41165C (de) * J. KÖSTER in Zittau i. S Seilscheiben aus zusammengenieteten Blechstreifen
GB139735A (en) 1919-10-09 1920-03-11 Otis Elevator Co Improvements relating to rope transmission for lifts and the like
US1796875A (en) * 1927-05-17 1931-03-17 Felten & Guilleaume Carlswerk Rope hoist
DE1280518B (de) * 1964-12-05 1968-10-17 Alois Kasper Hebezeugfabrik Aufzugsgetriebe mit Drehstrommotor
GB2076928A (en) * 1980-06-03 1981-12-09 Mitsubishi Electric Corp Reducing gear vibration in elevator apparatus
EP0884267A2 (de) * 1997-06-12 1998-12-16 WITTUR AUFZUGTEILE GmbH & Co. Antriebseinheit für Hebezeug
WO2008061492A1 (de) * 2006-11-04 2008-05-29 Manuela Widmann Antrieb für aufzüge
EP2020398A1 (de) 2007-08-03 2009-02-04 ORONA S. Coop. Seil für Aufzüge und Hubvorrichtung mit dem Seil

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE138813C (de) *
DE41165C (de) * J. KÖSTER in Zittau i. S Seilscheiben aus zusammengenieteten Blechstreifen
GB139735A (en) 1919-10-09 1920-03-11 Otis Elevator Co Improvements relating to rope transmission for lifts and the like
US1796875A (en) * 1927-05-17 1931-03-17 Felten & Guilleaume Carlswerk Rope hoist
DE1280518B (de) * 1964-12-05 1968-10-17 Alois Kasper Hebezeugfabrik Aufzugsgetriebe mit Drehstrommotor
GB2076928A (en) * 1980-06-03 1981-12-09 Mitsubishi Electric Corp Reducing gear vibration in elevator apparatus
EP0884267A2 (de) * 1997-06-12 1998-12-16 WITTUR AUFZUGTEILE GmbH & Co. Antriebseinheit für Hebezeug
WO2008061492A1 (de) * 2006-11-04 2008-05-29 Manuela Widmann Antrieb für aufzüge
EP2020398A1 (de) 2007-08-03 2009-02-04 ORONA S. Coop. Seil für Aufzüge und Hubvorrichtung mit dem Seil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10941021B2 (en) 2017-08-28 2021-03-09 Otis Elevator Company Sheave for belt with profile tracking features

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