EP1538123B1 - Brake device of elevator hoist - Google Patents

Brake device of elevator hoist Download PDF

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Publication number
EP1538123B1
EP1538123B1 EP02765508A EP02765508A EP1538123B1 EP 1538123 B1 EP1538123 B1 EP 1538123B1 EP 02765508 A EP02765508 A EP 02765508A EP 02765508 A EP02765508 A EP 02765508A EP 1538123 B1 EP1538123 B1 EP 1538123B1
Authority
EP
European Patent Office
Prior art keywords
braking
brake arm
segment
pressing
disposed
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.)
Expired - Fee Related
Application number
EP02765508A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1538123A4 (en
EP1538123A1 (en
Inventor
Hirofumi Mitsubishi Denki K. K. SAGAWA
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP1538123A1 publication Critical patent/EP1538123A1/en
Publication of EP1538123A4 publication Critical patent/EP1538123A4/en
Application granted granted Critical
Publication of EP1538123B1 publication Critical patent/EP1538123B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/24—Operating devices
    • B66D5/30—Operating devices electrical
    • 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
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/06—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect
    • B66D5/08—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect embodying blocks or shoes

Definitions

  • the present invention relates to an elevator hoisting machine braking apparatus disposed on an elevator hoisting machine for braking rotation of a rotating portion.
  • a braking surface is disposed on an inner circumference of a cylindrical rotating portion.
  • a pivotable brake arm is disposed inside the rotating portion.
  • a braking segment separably placed in contact with the braking surface by pivoting of the brake arm is mounted to the brake arm.
  • the brake arm is forced by a braking spring in such a direction that the braking segment contacts the braking surface.
  • An electromagnet is disposed inside the rotating portion.
  • An armature attracted by the electromagnet is linked to the brake arm by means of a linking pin.
  • the electromagnet When the electromagnet is not excited, the braking segment is pressed against the braking surface by the braking spring, braking rotation of the rotating portion by friction.
  • the armature By exciting the electromagnet, the armature can be attracted to the electromagnet, separating the braking segment from the braking surface counter to the braking spring, and releasing the brake.
  • the present invention aims to solve the above problems and an object of the present invention is to provide an elevator hoisting machine braking apparatus enabling a stable attracting operation to be achieved while reducing time spent on mounting and adjusting, and enabling strength of a brake arm to be reduced.
  • an elevator hoisting machine braking apparatus including: a cylindrical rotating portion in which a braking surface is disposed on an inner circumference; a supporting portion fixed relative to a fixed portion of an elevator hoisting machine; a brake arm disposed inside the rotating portion and pivotably supported by the supporting portion; a braking segment mounted to the brake arm and separably placed in contact with the braking surface by pivoting of the brake arm; and a pressing and attracting means for braking rotation of the rotating portion by pressing the braking segment against the braking surface by means of the brake arm and for releasing braking of the rotating portion by attracting the brake arm such that the braking segment separates from the braking surface, wherein: a first spherical seat is interposed between the brake arm and the braking segment; a second spherical seat is interposed between the brake arm and the pressing and attracting means; and a central portion of the braking segment is pressed against the braking surface during braking by means
  • FIG. 1 is a partially-sectioned front elevation showing an elevator hoisting machine braking apparatus according to Embodiment 1 of the present invention.
  • a cylindrical brake drum 1 constituting a rotating portion is rotated by a driving force from a motor of an elevator hoisting machine.
  • the brake drum 1 is rotated together with a drive sheave (not shown) around which an elevator main rope is wound.
  • a braking surface 1a is disposed on an inner circumference of the brake drum 1.
  • a frame 2 functioning as a supporting portion that is fixed relative to a fixed portion of the elevator hoisting machine is disposed inside the brake drum 1.
  • An arc-shaped brake arm 3 is supported by the frame 2 so as to be pivotable around a pin 4.
  • the brake arm 3 is disposed inside the brake drum 1 so as to face the braking surface 1a.
  • the pin 4 is disposed on a base end portion of the brake arm 3.
  • a braking segment accommodating recess portion 3a is disposed on a surface of the brake arm 3 facing the braking surface 1a.
  • a screw-threaded aperture 3b extending in a radial direction of the brake drum 1 and passing through the brake arm 3 is disposed in a bottom portion of the braking segment accommodating recess portion 3a.
  • a braking segment 5 is mounted in a vicinity of a tip portion of the brake arm 3.
  • the braking segment 5 is disposed inside the braking segment accommodating recess portion 3a.
  • the braking segment 5 is separably placed in contact with the braking surface 1a by pivoting of the brake arm 3.
  • a first spherical seat 6 is interposed between the brake arm 3 and the braking segment 5.
  • the first spherical seat 6 is disposed so as to be coaxial with the screw-threaded aperture 3b.
  • a first spherical recess portion 5a coupling with the first spherical seat 6 is formed in a central portion of a surface of the braking segment 5 on an opposite side from a surface contacting the braking surface 1a.
  • a first end portion of a stroke adjusting screw 7 is screwed into the screw-threaded aperture 3b from an opposite side to the first spherical seat 6.
  • a second spherical seat 8 is formed integrally on a second end portion of the stroke adjusting screw 7.
  • a locknut 9 for fixing an amount of fastening of the stroke adjusting screw 7 inside the screw-threaded aperture 3b is screwed onto an intermediate portion of the stroke adjusting screw 7.
  • a disk-shaped armature 10 is linked to the second end portion of the stroke adjusting screw 7.
  • a strike plate 11 is interposed between the armature 10 and the second spherical seat 8.
  • a second spherical recess portion 11a coupling with the second spherical seat 8 is formed in the strike plate 11.
  • a plurality of spherical-seat leaf springs 12 for pressing the second spherical seat 8 against the strike plate 11 are mounted to the armature 10.
  • An electromagnet 13 facing the armature 10 is secured to the frame 2.
  • a plurality of braking springs 14 for braking rotation of the brake drum 1 by pressing the braking segment 5 against the braking surface 1a are disposed between the electromagnet 13 and the armature 10.
  • the braking segment 5 is pressed against the braking surface 1a by the braking springs 14 through the armature 10, the strike plate 11, the second spherical seat 8, the stroke adjusting screw 7, the brake arm 3, and the first spherical seat 6.
  • the armature 10 can be attracted by the electromagnet 13 so as to act against the braking springs 14, separating the braking segment 5 from the braking surface 1a.
  • the pressing and attracting means 15 in Embodiment 1 includes the armature 10, the electromagnet 13, and the braking springs 14.
  • the first spherical seat 6 is disposed, relative to the second spherical seat 8, in a direction that the pressing and attracting means 15 presses the second spherical seat 8.
  • the first and second spherical seats 6 and 8 are disposed in a straight line extending along a resultant force vector of the pressing forces from the braking springs 14.
  • Figure 2 is a right side elevation showing a mounting construction of the braking segment 5 in Figure 1
  • Figure 3 is a cross section taken along line III - III in Figure 2 .
  • the braking segment 5 is mounted to the brake arm 3 by being pressed against the first spherical seat 6 by a pair of braking-segment leaf springs 16.
  • the braking segment 5 is pressed toward a central direction of the first spherical seat 6 by the braking-segment leaf springs 16.
  • the braking-segment leaf springs 16 are mounted to the brake arm 3 by the plurality of bolts 17.
  • the armature 10 When the electromagnet 13 is excited, the armature 10 is attracted toward the electromagnet 13 counter to the braking springs 14 and displaces, separating the braking segment 5 from the braking surface 1a. Thus, braking of the brake drum 1 is released, and the brake drum 1 is rotated together with the drive sheave by the driving force from the motor.
  • an operating stroke of the braking segment 5 is adjusted by loosening the locknut 9 and adjusting the amount of fastening of the stroke adjusting screw 7 inside the screw-threaded aperture 3b. More specifically, by tightening the stroke adjusting screw 7 to displace it toward the braking segment 5, a gap between the armature 10 and the electromagnet 13 during braking is increased, thereby also increasing the operating stroke of the braking segment 5. Conversely, by loosening the stroke adjusting screw 7 to displace it toward the electromagnet 13, the gap between the armature 10 and the electromagnet 13 during braking is reduced, thereby also reducing the operating stroke of the braking segment 5.
  • a stable attracting operation can be achieved without having to adjust the mounted angle of the armature 10, even when the precision of the attracting surface of the armature 10 relative to the brake arm 3 is low.
  • the first spherical seat 6 is disposed, relative to the second spherical seat 8, in a direction that the pressing and attracting means 15 presses the second spherical seat 8, there is no bending moment acting on the brake arm 3, enabling the strength of the brake arm 3 to be reduced, thereby enabling the brake arm 3 to be made thinner.
  • the second spherical seat 8 and the strike plate 11 do not separate from the armature 10 during the release operation, enabling the release operation to be stabilized. Furthermore, the brake arm 3 can be drawn closer during the release operation.
  • the braking segment 5 is mounted to the brake arm 3 by being pressed against the first spherical seat 6 by braking-segment leaf springs 16, removal and replacement of the braking segment 5 can be performed easily, simply by removing the braking-segment leaf springs 16. Consequently,maintainabilitycan be improved even in a braking apparatus mounted in a limited space inside the brake drum 1.
  • the braking segment 5 is pressed toward a central direction of the first spherical seat 6 by the braking-segment leaf springs 16, the braking segment 5 is displaced and placed in contact with the braking surface 1a while constantly maintaining its attitude relative to the braking surface 1a. Consequently, the braking segment 5 can be stably pressed against the brake drum 1.
  • Figure 4 is a partially-sectioned front elevation showing an elevator hoisting machine braking apparatus according to Embodiment 2 of the present invention
  • Figure 5 is a right side elevation showing a mounting construction of a braking segment in Figure 4 .
  • a fixed rod 21 passing through a tip portion of a brake arm 3 being an end portion at an opposite end of a braking segment 5 from a pin 4 (a pivot point) is fixed to an armature 10.
  • a spring bearing portion 21a is disposed on a tip portion of the fixed rod 21.
  • a first backlash preventing spring (a coil spring) 22 for forcing the brake arm 3 toward the pressing and attracting means 15 is disposed between the spring bearing portion 21a and the tip portion of the brake arm 3.
  • a plurality of second backlash preventing springs 23 for forcing the brake arm 3 in such a direction as to be separated from the pressing and attracting means 15 are disposed between the brake arm 3 and the armature 10 in a vicinity of the pin 4 (closer to the pin 4 than the braking segment 5) .
  • These backlash preventing springs 23 are disposed so as to be distributed uniformly in an axial direction of the pin 4 relative to an axial center of the pin 4, and are also disposed within a range of an axial length of the pin 4.
  • the spherical-seat leaf springs 12 shown in Embodiment 1 can be omitted.
  • second backlash preventing springs 23 for forcing the brake arm 3 in such a direction as to be separated from the pressing and attracting means 15 are disposed between the brake arm 3 and the armature 10 in a vicinity of the pin 4, even if disturbances by twisting forces such as that represented by the arrow A in Figure 5 act on the brake arm 3, backlash is prevented from arising in the operation of the brake arm 3, enabling the operation of the brake arm 3 to be stabilized.
  • the first backlash preventing spring 22 is disposed between the armature 10 and the brake arm 3, but it may also be disposed between the electromagnet 13 and the brake arm 3.
  • the second backlash preventing springs 23 are disposed between the armature 10 and the brake arm 3, but they may also be disposed between the electromagnet 13 and the brake arm 3.
  • first and second backlash preventing springs 22 and 23 are provided, but the second backlash preventing springs 23 may also be omitted and only a first backlash preventing spring 22 provided.
  • first backlash preventing spring 22 may also be omitted and only second backlash preventing springs 23 provided. In that case, it is necessary for the second spherical seat 8 to be pressed against the pressing and attracting means 15 by spherical-seat leaf springs 12, etc., such as those shown in Embodiment 1, for example.
  • braking apparatus only one braking apparatus is shown in Figure 1 and Figure 4 , but two braking apparatuses may also be disposed inside the brake drum with bilateral symmetry. Three or more braking apparatuses can also be disposed inside the brake drum.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Braking Arrangements (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
EP02765508A 2002-09-12 2002-09-12 Brake device of elevator hoist Expired - Fee Related EP1538123B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2002/009356 WO2004024611A1 (ja) 2002-09-12 2002-09-12 エレベータ巻上機のブレーキ装置

Publications (3)

Publication Number Publication Date
EP1538123A1 EP1538123A1 (en) 2005-06-08
EP1538123A4 EP1538123A4 (en) 2008-12-17
EP1538123B1 true EP1538123B1 (en) 2010-03-10

Family

ID=31986094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02765508A Expired - Fee Related EP1538123B1 (en) 2002-09-12 2002-09-12 Brake device of elevator hoist

Country Status (6)

Country Link
EP (1) EP1538123B1 (ko)
JP (1) JP4279780B2 (ko)
KR (1) KR100623168B1 (ko)
CN (1) CN1289381C (ko)
DE (1) DE60235654D1 (ko)
WO (1) WO2004024611A1 (ko)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1916435B (zh) * 2005-08-17 2010-12-08 三阳工业株式会社 制动装置
WO2009044450A1 (ja) * 2007-10-02 2009-04-09 Mitsubishi Electric Corporation エレベータ用巻上機及びブレーキ装置
KR101219210B1 (ko) * 2008-06-02 2013-01-08 미쓰비시덴키 가부시키가이샤 엘리베이터용 권상기의 브레이크장치
CN101823661B (zh) * 2010-03-17 2011-11-30 郭自刚 刹车抱闸具有机械缓冲装置的电梯曳引机
CN105090295B (zh) * 2014-05-19 2018-07-06 三菱电机株式会社 电磁制动装置及使用该电磁制动装置的电梯装置
CN104196925A (zh) * 2014-09-24 2014-12-10 安徽贵达汽车部件有限公司 一种车辆用刹车蹄铁
KR101564880B1 (ko) 2015-05-14 2015-10-30 이창근 엘리베이터용 착상 레벨 유지장치
JP6697792B2 (ja) * 2017-04-17 2020-05-27 三菱電機株式会社 エレベータの巻上機ブレーキ及びエレベータ巻上機
JP7031039B1 (ja) * 2021-04-20 2022-03-07 三菱電機株式会社 ブレーキ装置及びエレベータ用巻上機
JP7191261B1 (ja) * 2022-04-15 2022-12-16 三菱電機株式会社 エレベータ巻上機のブレーキ装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52133473A (en) * 1976-04-30 1977-11-08 Mitsubishi Electric Corp Brake drum device
JP3537348B2 (ja) * 1999-04-05 2004-06-14 三菱電機株式会社 トラクション式エレベーター用巻上機
JP2002106611A (ja) * 2000-09-28 2002-04-10 Sanyo Kogyo Kk ブレーキ装置
JP3635035B2 (ja) * 2001-02-15 2005-03-30 三陽工業株式会社 ブレーキ装置
JP4711574B2 (ja) * 2001-05-02 2011-06-29 三菱電機株式会社 制動方法及び制動装置

Also Published As

Publication number Publication date
KR20040083055A (ko) 2004-09-30
WO2004024611A1 (ja) 2004-03-25
CN1561309A (zh) 2005-01-05
DE60235654D1 (de) 2010-04-22
KR100623168B1 (ko) 2006-09-19
EP1538123A4 (en) 2008-12-17
EP1538123A1 (en) 2005-06-08
CN1289381C (zh) 2006-12-13
JP4279780B2 (ja) 2009-06-17
JPWO2004024611A1 (ja) 2006-01-05

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