EP2322464A1 - Dispositif de treuil pour ascenseur - Google Patents

Dispositif de treuil pour ascenseur Download PDF

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Publication number
EP2322464A1
EP2322464A1 EP09805055A EP09805055A EP2322464A1 EP 2322464 A1 EP2322464 A1 EP 2322464A1 EP 09805055 A EP09805055 A EP 09805055A EP 09805055 A EP09805055 A EP 09805055A EP 2322464 A1 EP2322464 A1 EP 2322464A1
Authority
EP
European Patent Office
Prior art keywords
bearing
sheave
shaft
wire rope
hoist apparatus
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.)
Granted
Application number
EP09805055A
Other languages
German (de)
English (en)
Other versions
EP2322464A4 (fr
EP2322464B1 (fr
Inventor
Masayuki Kawaguchi
Keiichi Koroki
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.)
Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
Original Assignee
Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
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 Meidensha Corp, Meidensha Electric Manufacturing Co Ltd filed Critical Meidensha Corp
Publication of EP2322464A1 publication Critical patent/EP2322464A1/fr
Publication of EP2322464A4 publication Critical patent/EP2322464A4/fr
Application granted granted Critical
Publication of EP2322464B1 publication Critical patent/EP2322464B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B66B11/08—Driving gear ; Details thereof, e.g. seals with hoisting rope or cable operated by frictional engagement with a winding drum or 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
    • B66B11/0438—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation with a gearless driving, e.g. integrated sheave, drum or winch in the stator or rotor of the cage motor

Definitions

  • the present invention relates to an elevator hoist device or apparatus used for moving an elevator car up and down in an elevator, and more specifically to a hoist device or apparatus including a sheave supported by a shaft in a manner of cantilever.
  • FIG. 6 shows an elevator hoist apparatus in which a sheave is supported on a shaft in the form of a cantilever.
  • the elevator hoist apparatus 101 includes a stator 104 and a rotor 111.
  • the stator 104 includes a stator core 103 attached to an internal periphery of a frame 102.
  • the rotor 111 includes a rotor core 105 attached to a shaft 106 which is supported rotatably by a first bearing 107 (referred to as a sheave's side bearing hereinafter) and a second bearing 108 (referred to as an anti-sheave's side bearing hereinafter), on first and second brackets 109 and 110 installed in the frame.
  • the elevator hoist apparatus further includes a sheave 112 which is mounted on a projecting end portion of the shaft 106 projecting outwards to an outer side of the sheave's side bearing 107.
  • the external periphery of the sheave 112 is formed with a wire rope wind-up surface 114 including a plurality of wire rope grooves 113 arranged in a row.
  • Patent Document 1 JP 53-5963 U
  • an overhang dimension or length D of the shaft 106 is expressed by a following equation 1 by using a dimension A from an end of the wire rope wind-up surface 114 toward the sheave's side bearing 107, to a sheave shaft load center (the middle of the wire rope wind-up surface 114), a dimension B from a sheave's side end face of the sheave side bearing 107 to the middle of the sheave side bearing 107, and a distance or spacing C from the sheave's side end face of the sheave's side bearing 107 to the end of the wire rope wind-up surface 1 14 toward the sheave side bearing 107.
  • D A + B + C
  • Equation 2 and 3 are obtained by using a distance E between the middle of the sheave's side bearing 107 and the middle of the anti-sheave's side bearing 108, a force L1 applied to the sheave's side bearing 107 by a sheave shaft load W and a force L2 applied to the anti-sheave's side bearing 108.
  • the shaft receives a bending moment M due to the sheave shaft load W.
  • the hoist apparatus requires the use of a thick shaft having a greater shaft diameter, and hence encounters the disadvantage of weight increase and cost increase.
  • an existing system employs a hoist apparatus 120 of a dual support structure having a sheave 1 24 between bearings 122 and 123 supporting a shaft 121 , as shown in FIG. 7 .
  • this structure supporting the sheave on both sides is disadvantageous in that installation and replacement of the sheave are difficult after the assembly of the hoist apparatus.
  • an elevator hoist apparatus comprising a stator including a stator core attached to an internal periphery of a frame, a rotor including a rotor core attached to a shaft supported rotatably, by a first bearing and a second bearing, on first and second brackets provided in the frame, and a sheave mounted on a projecting end portion of the shaft projecting to an outer side of the first bearing
  • the invention of Claim 1 is arranged so that the sheave includes a wire rope wind-up surface which is formed on an external peripheral side of the sheave and which includes a plurality of wire rope grooves arranged in a row, and a bearing insertion portion which is formed on an internal peripheral side of the wire rope wind-up surface and which is arranged to receive the first bearing, the first bearing is inserted in the bearing insertion portion, and an end face of the first bearing on a side toward a sheave shaft load center is located on an inner side of the sheave shaft load center (on a side toward the second bearing).
  • an elevator hoist apparatus comprising a stator including a stator core attached to an internal periphery of a frame, a rotor including a rotor core attached to a shaft supported rotatably, by a first bearing and a second bearing, on first and second brackets provided in the frame, and a sheave mounted on a projecting end portion of the shaft projecting to an outer side of the first bearing
  • the invention of Claim 2 is arranged so that the sheave includes a wire rope wind-up surface which is formed on an external peripheral side of the sheave and which includes a plurality of wire rope grooves arranged in a row, and a bearing insertion portion which is formed on an internal peripheral side of the wire rope wind-up surface and which is arranged to receive the first bearing, the first bearing is inserted in the bearing insertion portion, and a widthwise middle of the first bearing is positioned at the sheave shaft load center.
  • an elevator hoist apparatus comprising a stator including a stator core attached to an internal periphery of a frame, a rotor including a rotor core attached to a shaft supported rotatably, by a first bearing and a second bearing, on first and second brackets provided in the frame, and a sheave mounted on a projecting end portion of the shaft projecting to an outer side of the first bearing
  • the invention of Claim 3 is arranged so that the sheave includes a wire rope wind-up surface which is formed on an external peripheral side of the sheave and which includes a plurality of wire rope grooves arranged in a row, and a bearing insertion portion which is formed on an internal peripheral side of the wire rope wind-up surface and which is arranged to receive the first bearing, the first bearing is inserted in the bearing insertion portion, and a widthwise middle of the first bearing is positioned on an outer side of the sheave shaft load center (on a side opposite to an anti-sheave's side bearing with respect to the
  • FIG. 1 shows an elevator hoist apparatus or device 1 according to a first embodiment.
  • the elevator hoist apparatus 1 includes a stator 4 and a rotor 11.
  • the stator 4 is formed by attaching or fixing a stator core 3 to an internal periphery of a frame 2.
  • the rotor 11 is formed by supporting a shaft 6 to which a rotor core 5 is attached or fixed, by a first bearing 7 (hereinafter referred to as a sheave's side bearing) and a second bearing 8 (hereinafter referred to as an anti-sheave's side bearing), rotatably on first and second brackets 9 and 10 installed in the frame 2.
  • the elevator hoist apparatus 1 further includes a sheave 12 (wheel with a groove for a rope to run on) mounted on a projecting end portion of the shaft 6 which projects to an outer side of the sheave bearing 7.
  • the sheave 12 includes a wire rope wind-up surface 14 which is formed in an external periphery of the sheave 12, and which is formed with a plurality of wire rope grooves 13 arranged in a row.
  • the sheave 12 includes a bearing insertion portion 15 which is formed on an internal peripheral side of the wire rope wind-up surface 14 or radial inner side surrounded by the wire rope wind-up surface 14, and adapted to receive the sheave side bearing 7 inserted into the bearing insertion portion 15.
  • the sheave side bearing 7 is inserted in the bearing insertion portion 15.
  • the sheave's side bearing 7 is located between the position at which the sheave's side bearing 7 is inserted, and covered, entirely in the bearing insertion portion 15, and the position at which the end face of the sheave's side bearing 7 facing toward the sheave shaft load center is located at the position of the sheave shaft load center.
  • This relationship between the position of the sheave's side bearing 7 and the position of the sheave 12 is expressed by a following mathematical expression, 2B ⁇ C ⁇ A.
  • the sheave's side bearing 7 By placing the sheave's side bearing 7 within the bearing insertion portion 15 as explained above, it is possible to decrease the overhang dimension D, as compared to the hoist apparatus of the earlier technology shown in FIG. 6 .
  • the force L1 acting on the sheave's side bearing 7 and the force L2 acting on the anti-sheave side bearing 8 become smaller in magnitude, and hence it becomes possible to reduce the sizes and weights of these bearings, the shaft and the frame, and to reduce the cost.
  • the bending moment M due to the sheave shaft load W becomes smaller, too. Accordingly, even in the case of a thinner shaft, it is possible to decrease the deflection of the shaft due to the sheave shaft load W, and to decrease the inclination of the sheave.
  • FIG. 2 shows an elevator hoist apparatus 1 according to a second embodiment.
  • the sheave's side bearing 7 inserted in the bearing insertion portion 15 is so positioned that the widthwise middle or middle in the widthwise direction, of the sheave's side bearing 7 is located at the sheave shaft load center.
  • the second embodiment is the same as the first embodiment, and repetitive explanation is omitted.
  • the bending moment M due to the sheave shaft load W is eliminated, so and the shaft undergoes no deflection, and it is possible to eliminate the inclination of the sheave due to deflection of the shaft. In addition, it is possible to make the shaft thinner in size and lighter in weight.
  • FIG. 3 shows an elevator hoist apparatus 1 according to a third embodiment.
  • the sheave's side bearing 7 is so positioned that the widthwise middle or middle in the widthwise direction of the sheave's side bearing 7 is positioned on the outer side of the sheave shaft load center (on the opposite side of the sheave shaft load center, opposite to the side on which the anti-sheave's side bearing 8 is located).
  • This relationship between the position of the sheave's side bearing 7 and the position of the sheave 12 is expressed by a following mathematical expression, 0 ⁇ D.
  • the sheave shaft load W is supported between the sheave's side bearing 7 and anti-sheave's side bearing 8. Therefore, this arrangement can restrain the deflection of the shaft, eliminate the inclination of the sheave, and support the sheave in a stable state like the hoist apparatus of the dual support type as shown in FIG. 7 . In addition, this arrangement can maintain the superior usability of the cantilever type hoist apparatus.
  • the sheave 12 is fixedly mounted on the end portion of the shaft 6 by shrink fitting.
  • the end portion of shaft 6 is inserted into a shaft insertion portion 16 formed in the sheave 12, and fixed to the sheave 12 by nut 17 or bolts 18. These arrangements can facilitate operations such as replacement of the sheave.

Landscapes

  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
EP09805055.2A 2008-08-08 2009-08-07 Dispositif de treuil pour ascenseur Active EP2322464B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008205092A JP5347365B2 (ja) 2008-08-08 2008-08-08 エレベータの巻上装置
PCT/JP2009/064028 WO2010016573A1 (fr) 2008-08-08 2009-08-07 Dispositif de treuil pour ascenseur

Publications (3)

Publication Number Publication Date
EP2322464A1 true EP2322464A1 (fr) 2011-05-18
EP2322464A4 EP2322464A4 (fr) 2014-12-24
EP2322464B1 EP2322464B1 (fr) 2017-06-21

Family

ID=41663786

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09805055.2A Active EP2322464B1 (fr) 2008-08-08 2009-08-07 Dispositif de treuil pour ascenseur

Country Status (5)

Country Link
EP (1) EP2322464B1 (fr)
JP (1) JP5347365B2 (fr)
KR (1) KR101208904B1 (fr)
CN (1) CN102112387B (fr)
WO (1) WO2010016573A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6260024B2 (ja) 2013-11-07 2018-01-17 株式会社明電舎 エレベータの巻上機

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4355785A (en) * 1981-02-23 1982-10-26 Westinghouse Electric Corp. Electrically driven sheave
EP1657207A1 (fr) * 2003-08-21 2006-05-17 Mitsubishi Denki Kabushiki Kaisha Treuil de faible epaisseur pour ascenseur
EP1845051A1 (fr) * 2004-12-15 2007-10-17 Mitsubishi Electric Corporation Appareil de levage pour ascenseur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS535963U (fr) * 1976-07-01 1978-01-19
JPS62111889A (ja) * 1985-11-11 1987-05-22 株式会社日立製作所 エレベ−タ−巻上機の基台構造
US4679661A (en) * 1986-02-24 1987-07-14 Otis Elevator Company Modular gearless elevator drive
JP2003104666A (ja) 2001-09-28 2003-04-09 Meidensha Corp 巻上機及びエレベータ装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4355785A (en) * 1981-02-23 1982-10-26 Westinghouse Electric Corp. Electrically driven sheave
EP1657207A1 (fr) * 2003-08-21 2006-05-17 Mitsubishi Denki Kabushiki Kaisha Treuil de faible epaisseur pour ascenseur
EP1845051A1 (fr) * 2004-12-15 2007-10-17 Mitsubishi Electric Corporation Appareil de levage pour ascenseur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2010016573A1 *

Also Published As

Publication number Publication date
CN102112387B (zh) 2014-12-03
EP2322464A4 (fr) 2014-12-24
EP2322464B1 (fr) 2017-06-21
WO2010016573A1 (fr) 2010-02-11
KR20110039486A (ko) 2011-04-18
CN102112387A (zh) 2011-06-29
KR101208904B1 (ko) 2012-12-06
JP2010037094A (ja) 2010-02-18
JP5347365B2 (ja) 2013-11-20

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