EP2574584A1 - Reibantrieb für einen Aufzug und Betriebsverfahren - Google Patents

Reibantrieb für einen Aufzug und Betriebsverfahren Download PDF

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Publication number
EP2574584A1
EP2574584A1 EP11183573A EP11183573A EP2574584A1 EP 2574584 A1 EP2574584 A1 EP 2574584A1 EP 11183573 A EP11183573 A EP 11183573A EP 11183573 A EP11183573 A EP 11183573A EP 2574584 A1 EP2574584 A1 EP 2574584A1
Authority
EP
European Patent Office
Prior art keywords
traction sheave
traction
motor
car
elevator
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Withdrawn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
EP11183573A
Other languages
English (en)
French (fr)
Inventor
Roman Lenk
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.)
Inventio AG
Original Assignee
Inventio AG
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 Inventio AG filed Critical Inventio AG
Priority to EP11183573A priority Critical patent/EP2574584A1/de
Publication of EP2574584A1 publication Critical patent/EP2574584A1/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Withdrawn legal-status Critical Current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
    • B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/04—Driving gear ; Details thereof, e.g. seals
    • B66B11/043—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation
    • B66B11/0476—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation with friction gear, e.g. belt linking motor to sheave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/04—Driving gear ; Details thereof, e.g. seals
    • B66B11/043—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation
    • B66B11/0484—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation with a clutch or a coupling system between several motors, e.g. switching different speeds, progressive starting, torque limitation, flywheel

Definitions

  • an elevator car and a counterweight are conventionally supported on and interconnected by traction means.
  • the traction means is driven through engagement with a motor-driven traction sheave to move the car and counterweight in opposing directions along the elevator hoistway.
  • the drive unit consisting of the motor, an associated brake and the traction sheave, is normally located in the upper end of the elevator hoistway or alternatively in a machine room directly above the hoistway.
  • a further important consequence of over-traction is that if the counterweight becomes stuck along the hoistway, so that the section of the traction means between the traction sheave and the counterweight becomes slack, the drive may still be capable of moving the elevator car upwards. In a second converse situation, if the car becomes jammed while being lowered down the hoistway, resulting in slackening of the section of the traction means between the car and the traction sheave, the drive may still be capable of moving the counterweight upwards.
  • US-A1-2008/0185232 describes an apparatus and method for solving the problems associated with the first situation described above.
  • the drive unit has a motor unit and a deflecting unit. If the counterweight which is supported by the deflecting unit rests on a pit buffer for example, the deflecting unit is unloaded and is raised by means of a spring element of the monitoring device. A sensor of the monitoring device detects the movement of the deflecting unit and switches off the motor of the motor unit via a safety circuit.
  • EP-A2-1764335 proposes another solution to over-traction wherein the running surface of the traction sheave, over which the traction means runs, is provided with a friction-reducing coating or subjected to a friction-reducing surface treatment.
  • An objective of the present invention is to provide an elevator drive that reduces the effects and stated disadvantages of over-traction.
  • a further objective is to provide an elevator installation and an operating method in which the elevator car cannot be raised further by the traction means if the counterweight becomes jammed along its travel path particularly when it strikes an associated buffer.
  • the invention provides an elevator drive comprising a motor and a traction sheave wherein the motor engages the traction sheave with a first coefficient of friction.
  • the motor In a conventional drive where the traction sheave is positively driven by the motor, either directly or through a gear, the result is always simultaneous rotation of traction sheave with the motor.
  • the motor in the present invention as defined by the claims the motor is frictionally coupled to the traction sheave and thereby facilitates a degree of slippage or non-simultaneous rotation therebetween.
  • the motor includes a motor shaft and the traction sheave engages with the motor shaft. Accordingly, the region in which the shaft engages with the traction sheave is external to the motor housing and is therefore easy to inspect and maintain.
  • the traction sheave can partially surround the motor shaft.
  • the traction sheave can be arranged to engage with an axial end of the motor shaft.
  • one of the traction sheave and the motor shaft preferably includes a frictional plate mounted for concurrent rotation therewith but axially displaceable therealong. Axial displacement of the frictional plate allows it to be easily replaced during maintenance.
  • a spring is provided to axially bias the frictional plate. Accordingly, the spring biases the frictional plate with a normal force axially towards and into engagement with the other of the traction sheave and the motor shaft.
  • the spring can be axially adjustable.
  • the spring is retained on one of the traction sheave and the motor shaft by a collar and the collar is adjustable axially therealong. Hence, the force exerted by the spring on the friction plate can be easily adjusted.
  • the other of the traction sheave and the motor shaft includes a second frictional plate mounted for concurrent rotation therewith.
  • the invention also provides an elevator installation comprising a drive as described above together with a car, a counterweight and traction means interconnecting the car and counterweight wherein the traction means engages the traction sheave of the drive with a second coefficient of friction.
  • the first coefficient of friction is less than the second coefficient of friction. Accordingly, even if the motor begins to slip with respect to the traction sheave, the traction sheave will still retain the traction means.
  • the first coefficient of friction can be selected such that if the car or counterweight becomes jammed during downward movement, the traction sheave will not rotate even if the motor continues to rotate. This ensures that there is no over-traction.
  • the invention also provides a method of operating an elevator installation having a car, a counterweight, traction means interconnecting the car and the counterweight, a motor and a traction sheave engaging the traction means, the method comprises the step of frictionally driving the traction sheave with the motor and thereby facilitates a degree of slippage or non-simultaneous rotation therebetween
  • the method further comprises the step of permitting the motor to rotate with respect to the traction sheave when one of the car and the counterweight becomes jammed during downward movement. This reduces the effects of over-traction.
  • FIG. 1 An elevator installation 1 according to the invention is shown in FIG. 1 .
  • the installation 1 is generally defined by a hoistway 3 bound by walls 2 within a building wherein a counterweight 5 and car 4 are movable in opposing directions along guide rails (not shown). Buffers 12, 13 are mounted in a pit of the hoistway 3 underneath the counterweight 5 and car 4, respectively. Suitable traction means 11 supports and interconnects the counterweight 5 and the car 4. The traction means 11 is fastened at either end to termination devices 40 mounted in the upper region of the hoistway 3.
  • the traction means 11 extends from one termination device 40 to a deflection pulley 6 mounted on top of the counterweight 5, over a traction sheave 7, under the car 4 via deflection pulleys 6 and is fastened at the other end in the other termination device 40.
  • a deflection pulley 6 mounted on top of the counterweight 5, over a traction sheave 7, under the car 4 via deflection pulleys 6 and is fastened at the other end in the other termination device 40.
  • the traction sheave 7 is driven by a motor 8 which together form the drive 9 of the elevator 1.
  • the traction sheave 7 is implemented as a hollow cylinder having a radially outer surface 7.2 and a radially inner surface 7.1.
  • the inner surface 7.1 frictionally engages a shaft 20 of the motor 8, the engagement interface having a first coefficient of friction ⁇ 1.
  • the outer surface 7.2 of the of the sheave 7 engages with the traction means 11 with a second coefficient of friction ⁇ 2 for driving the interconnected car 4 and counterweight 5 along guide rails in the hoistway 3.
  • a first portion 11.1 of the tension means 11 spanning the traction sheave 7 and the deflection pulleys 6 mounted under the elevator car 4 is under a first tension FZ1.
  • the portion 11.2 of the traction means 11 spanning between the sheave 7 and the deflection pulley 6 mounted on the counterweight 5 experiences a second tension FZ2.
  • FIG. 3 illustrates an alternative embodiment of a drive 9 according to the invention.
  • the drive 9 comprises a motor 8 positioned centrally between two end plates 15 and connected thereto by a series of frame elements 14. Such a drive arrangement has previously been described in WO-A1-2009/060037 .
  • a first frictional coupling plate 31 is mounted at each of the opposing ends of the motor shaft 20.
  • the drive 9 also includes two discrete traction sheaves 7.
  • Each of the traction sheaves 7 is rotatably mounted and supported at one end in the end plate 15 and a second frictional coupling plate 32 is provided at the opposing end of the traction sheave 7 for engagement with the neighbouring first frictional coupling plate 31 mounted to the motor shaft 20.
  • Each pair of engaging frictional coupling plates 31,32 forms a frictional coupler 30 which will be described in greater detail with reference to FIG. 4 .
  • Each of the traction sheaves 7 supports two discrete traction means 11 and as in the previous embodiment, each traction sheave 17 engages with the traction means 11 with a second coefficient of friction ⁇ 2 for driving the interconnected car 4 and counterweight 5 along guide rails in the hoistway 3.
  • An intermediate bearing 16 is securely mounted to the frame elements 14 to support each traction sheave 7 at a position between the second frictional coupling plate 32 and neighbouring traction means 11.
  • FIG. 4 further illustrates the frictional coupler 30 positioned to the left of the motor 8 as shown in FIG. 3 .
  • the second frictional plate 32 is securely fastened to the end of the traction sheave 7.
  • the first frictional plate 31 comprises a cavity 33 into which the end of the motor shaft 20 is inserted.
  • Splines 34 provided around the wall of the cavity 33 mate with corresponding splines 34 on the motor shaft 20 thereby ensuring concurrent rotation of the first frictional plate 31 with the motor shaft 20.
  • a spring 35 is positioned between the first frictional plate 31 and an adjustment collar 21 mounted on the motor shaft 20.
  • the spring 35 biases the first frictional plate 31 with a normal force N axially into engagement with second frictional plate 32. This engagement exhibits a first coefficient of friction ⁇ 1.
  • the collar is adjustable axially along the motor shaft 20 and thereby the magnitude of the normal force N can be varied.
  • the counterweight 5 strikes its buffer 12 in the pit of the hoistway 2, a substantial portion of the tension in the counterweight span of the traction means 11 is relieved since the weight of the counterweight 5 is now supported directly by the buffer 12 rather than by the traction means 11.
  • the first coefficient of friction ⁇ 1 is selected and the normal force N exerted by the spring 35 can be adjusted to ensure that, in these circumstances, the normal force N exerted by the spring 35 is insufficient to deliver the greater torque required through the frictional coupler 30 to drive the now unbalanced car 4. Accordingly, although the motor shaft 20 continues to rotate, it will not induce rotation into the traction sheave 7.
EP11183573A 2011-09-30 2011-09-30 Reibantrieb für einen Aufzug und Betriebsverfahren Withdrawn EP2574584A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11183573A EP2574584A1 (de) 2011-09-30 2011-09-30 Reibantrieb für einen Aufzug und Betriebsverfahren

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11183573A EP2574584A1 (de) 2011-09-30 2011-09-30 Reibantrieb für einen Aufzug und Betriebsverfahren

Publications (1)

Publication Number Publication Date
EP2574584A1 true EP2574584A1 (de) 2013-04-03

Family

ID=44763938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11183573A Withdrawn EP2574584A1 (de) 2011-09-30 2011-09-30 Reibantrieb für einen Aufzug und Betriebsverfahren

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EP (1) EP2574584A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2789562A1 (de) * 2013-04-10 2014-10-15 Kone Corporation Drehmomenteingrenzungskupplung für Hebemaschine
DE102017206131A1 (de) 2017-04-10 2018-10-11 Thyssenkrupp Ag Antriebswelle für eine Aufzugsanlage

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE613078C (de) * 1932-09-06 1935-05-13 Hans Mangelsdorff Feineinstellungskupplung fuer Aufzuege
GB576528A (en) * 1944-01-31 1946-04-09 Express Lift Co Ltd Improvements in driving arrangements for lifts, hoists and the like
US4465162A (en) * 1981-12-28 1984-08-14 Mitsubishi Denki Kabushiki Kaisha Elevator drive apparatus using a traction-type speed change gear
JPS59165877U (ja) * 1983-04-19 1984-11-07 三菱電機株式会社 エレベ−タの減速装置
GB2153465A (en) 1984-01-11 1985-08-21 Hitachi Ltd Emergency stop control apparatus for elevator
US5244060A (en) 1991-05-09 1993-09-14 Hitachi, Ltd. Elevator apparatus
US5323878A (en) 1991-08-20 1994-06-28 Hitachi, Ltd. Braking apparatus for elevator cage
EP1493708A2 (de) * 2003-07-03 2005-01-05 Alberto Sassi S.P.A Antrieb für Aufzug oder Lastenaufzug
EP1764335A2 (de) 2005-09-20 2007-03-21 Inventio Ag Aufzugsanlage mit Antriebsriemenscheibe und flachriemenartigem Tragmittel
US20070170009A1 (en) 2004-04-28 2007-07-26 Mitsubishi Denki Kabushiki Kaisha Elevator Appartus
JP2007230693A (ja) * 2006-02-28 2007-09-13 Toshiba Elevator Co Ltd エレベータ装置
US20080185232A1 (en) 2007-02-02 2008-08-07 Philippe Henneau Lift and method of monitoring a lift
WO2009060037A1 (de) 2007-11-07 2009-05-14 Inventio Ag An elevator drive unit
EP2292546A1 (de) 2009-09-04 2011-03-09 Inventio AG Vorrichtung und Verfahren zur Detektion, ob ein Aufzugskorb auf seinem Fahrweg eingeklemmt wurde
WO2011069773A1 (en) 2009-12-11 2011-06-16 Inventio Ag Selective elevator braking during emergency stop

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE613078C (de) * 1932-09-06 1935-05-13 Hans Mangelsdorff Feineinstellungskupplung fuer Aufzuege
GB576528A (en) * 1944-01-31 1946-04-09 Express Lift Co Ltd Improvements in driving arrangements for lifts, hoists and the like
US4465162A (en) * 1981-12-28 1984-08-14 Mitsubishi Denki Kabushiki Kaisha Elevator drive apparatus using a traction-type speed change gear
JPS59165877U (ja) * 1983-04-19 1984-11-07 三菱電機株式会社 エレベ−タの減速装置
GB2153465A (en) 1984-01-11 1985-08-21 Hitachi Ltd Emergency stop control apparatus for elevator
US5244060A (en) 1991-05-09 1993-09-14 Hitachi, Ltd. Elevator apparatus
US5323878A (en) 1991-08-20 1994-06-28 Hitachi, Ltd. Braking apparatus for elevator cage
EP1493708A2 (de) * 2003-07-03 2005-01-05 Alberto Sassi S.P.A Antrieb für Aufzug oder Lastenaufzug
US20070170009A1 (en) 2004-04-28 2007-07-26 Mitsubishi Denki Kabushiki Kaisha Elevator Appartus
EP1764335A2 (de) 2005-09-20 2007-03-21 Inventio Ag Aufzugsanlage mit Antriebsriemenscheibe und flachriemenartigem Tragmittel
JP2007230693A (ja) * 2006-02-28 2007-09-13 Toshiba Elevator Co Ltd エレベータ装置
US20080185232A1 (en) 2007-02-02 2008-08-07 Philippe Henneau Lift and method of monitoring a lift
WO2009060037A1 (de) 2007-11-07 2009-05-14 Inventio Ag An elevator drive unit
EP2292546A1 (de) 2009-09-04 2011-03-09 Inventio AG Vorrichtung und Verfahren zur Detektion, ob ein Aufzugskorb auf seinem Fahrweg eingeklemmt wurde
WO2011069773A1 (en) 2009-12-11 2011-06-16 Inventio Ag Selective elevator braking during emergency stop

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2789562A1 (de) * 2013-04-10 2014-10-15 Kone Corporation Drehmomenteingrenzungskupplung für Hebemaschine
DE102017206131A1 (de) 2017-04-10 2018-10-11 Thyssenkrupp Ag Antriebswelle für eine Aufzugsanlage
WO2018188974A1 (de) 2017-04-10 2018-10-18 Thyssenkrupp Elevator Ag Antriebswelle für eine aufzugsanlage
US11530113B2 (en) 2017-04-10 2022-12-20 Tk Elevator Innovation And Operations Gmbh Drive shaft for an elevator system

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