EP2586739A1 - Brake release mechanism - Google Patents

Brake release mechanism Download PDF

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Publication number
EP2586739A1
EP2586739A1 EP10853667.3A EP10853667A EP2586739A1 EP 2586739 A1 EP2586739 A1 EP 2586739A1 EP 10853667 A EP10853667 A EP 10853667A EP 2586739 A1 EP2586739 A1 EP 2586739A1
Authority
EP
European Patent Office
Prior art keywords
release mechanism
relative rotation
brake
brake release
rolling bodies
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Withdrawn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
EP10853667.3A
Other languages
German (de)
English (en)
French (fr)
Inventor
Yoshinori Tani
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 EP2586739A1 publication Critical patent/EP2586739A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • 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
    • 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
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/027—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions to permit passengers to leave an elevator car in case of failure, e.g. moving the car to a reference floor or unlocking the door
    • 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

Definitions

  • the present invention relates to a brake release mechanism for a hoisting-machine brake for an elevator.
  • a brake for stopping a car is provided to a hoisting machine of an elevator.
  • An electromagnetic coil is provided to the brake. During a normal operation in which the car is raised and lowered, the electromagnetic coil is energized. By an electromagnetic function, the hoisting-machine brake is placed in a released state.
  • the hoisting-machine brake is configured so that the energization is interrupted to automatically place the brake in a braking state. Therefore, as an operation after the car makes an emergency stop, the hoisting-machine brake is manually released to place the car in a state in which the car can be raised and lowered and then the car is moved to the nearest floor.
  • Patent Literature 1 As a structure for manually releasing the hoisting-machine brake in the situation described above, there is a structure disclosed in Patent Literature 1.
  • a pin passes through a movable iron core constituting the brake.
  • a distal end of the pin is screwed into a fixed iron core having an electromagnetic magnet.
  • a head of the pin projects from a surface of the movable iron core, which is on the side opposite to the fixed iron core.
  • a wedge-like portion of a brake releaser is inserted between the head of the pin and the movable iron core.
  • a brake shoe supported by the movable iron core is separated from a braking surface of a rotor.
  • the present invention has been made in view of the problem described above, and therefore has an object to provide a brake release mechanism capable of reducing effort required for a manual brake releasing operation.
  • a brake release mechanism for a hoisting-machine brake for an elevator including movable bodies for supporting brake shoes and a fixed base having electromagnetic coils for driving the movable bodies
  • the brake release mechanism including: a first member and a second member provided so as to be rotatable relative to each other; and a plurality of rolling bodies provided between the first member and the second member, in which: the brake release mechanism further includes: a plurality of supporting holes for partially housing the plurality of rolling bodies therein, the plurality of supporting holes being formed on one of a pair of surfaces of the first member and the second member, which face each other; and a plurality of elongated holes each extending in an arc-like manner so as to enable a corresponding one of the plurality of rolling bodies to move while rolling, the plurality of elongated holes being formed on another of the pair of surfaces ; the plurality of supporting holes respectively support the plurality of
  • the brake release mechanism of the present invention it is possible to reduce effort required for a manual brake releasing operation.
  • FIG. 1 is a schematic view of an internal-expanding drum brake for an elevator hoisting-machine, which uses the brake release mechanism according to this embodiment.
  • a hoisting-machine brake 1 includes a pair of movable bodies 3 and a fixed base 5.
  • the pair of movable bodies 3 are respectively provided on both sides of the fixed base 5 so as to sandwich the fixed base 5 therebetween.
  • a projection 3a to which a fixed lever described below is locked by hooking, is formed on each of the movable bodies 3.
  • the brake shoes 9 are respectively supported by the corresponding movable bodies 3.
  • An elastic body 11 is provided between each of the movable bodies 3 and the fixed base 5. In this manner, the pair of movable bodies 3 and the pair of brake shoes 9 are constantly biased toward the rotor 7 by elastic forces of the corresponding elastic bodies 11, respectively.
  • the fixed base 5 includes electromagnetic coils (not shown) in the vicinity of the pair of movable bodies 3.
  • the pair of movable bodies 3 are driven by the electromagnetic coils. Specifically, when the electromagnetic coils are energized, the pair of movable bodies 3 are subjected to driving forces for attracting the movable bodies toward the fixed base 5 by electromagnetic forces thereof.
  • FIG. 2 is a view for illustrating a state in which a movable lever and a fixed lever, which constitute the brake release mechanism, are combined.
  • FIG. 3 is a view for illustrating a state as viewed from the arrow III in FIG. 2 .
  • FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3 .
  • the brake release mechanism includes a movable lever (first member) 13, a fixed lever (second member) 15, and a plurality of rolling bodies 17.
  • the movable lever 13 and the fixed lever 15 are provided so as to be rotatable relative to each other.
  • the plurality of (three in this embodiment) rolling bodies 17 are provided between the movable lever 13 and the fixed lever 15, and are formed as, for example, spherical bodies made of a bearing steel material in this embodiment.
  • the same number of (three in this embodiment) supporting holes 19 as that of the rolling bodies are formed on one surface 13a of a pair of surfaces 13a and 15a of the movable lever 13 and the fixed lever 15, which face each other.
  • the same number of (three in this embodiment) elongated holes 21 as that of the rolling bodies are formed on the another surface 15a.
  • the supporting holes and the elongated holes are further described referring to other figures.
  • FIG. 5 is a plan view of the movable lever.
  • FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5 .
  • FIG. 7 is a plan view of the fixed lever.
  • FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 7 , for illustrating an arc-like region extending along the line VIII-VIII, which is developed in a planar form.
  • the movable lever 13 includes a body portion 23 and a lever-piece portion 25.
  • the body portion 23 is a circular disc-like portion provided about a rotation axis CL for the above-mentioned relative rotation.
  • a through hole 27 is formed in a central portion of the body portion 23, a through hole 27 is formed.
  • the lever-piece portion 25 is a portion extending in a radial direction for the relative rotation, and specifically, is a portion extending from the body portion 23 outward in a radial direction of the body portion 23 in this embodiment.
  • Each of the supporting holes 19 is a recess which is open on the above-mentioned one surface 13a of the body portion 23.
  • Each of the supporting holes 19 has a form in which each of the rolling bodies 17 is partially housed, and for example, has a shape in accordance with an outer shape of each of the rolling bodies 17 (inner-surface shape similar to the outer shape of each of the rolling bodies).
  • each of the rolling bodies 17 is a spherical body in this embodiment, and hence the inner-surface shape of each of the supporting holes 19 is formed as a spherical surface shape.
  • a depth of each of the supporting holes 19 is a half of a diameter "d" of the spherical body forming each of the rolling bodies 17, as illustrated in FIG.
  • each of the supporting holes 19 is a semi-spherical recess. Because of the form of each of the supporting holes 19 described above, each of the supporting holes 19 supports a corresponding one of the rolling bodies 17 in a mode in which the rolling body cannot move in the hole but can spin by itself in the hole, in other words, in a mode in which the rolling body can move and spin by itself in synchronization with a corresponding one of the supporting holes.
  • the three supporting holes 19 are arranged on a circumference having a single radius about the center (relative rotation axis CL) of the body portion 23 in plan view. Further, each of the supporting holes 19 is separated from another adjacent one of the supporting holes 19 at an equiangular distance (120 degrees in this embodiment) in plan view.
  • the fixed lever 15 includes a body portion 29 and a fixing-arm portion 31.
  • the body portion 29 is a circular disc-like portion provided about the relative rotation axis CL.
  • a through hole 33 is formed in a central portion of the body portion 29.
  • the fixing-arm portion 31 is a portion relating to the relative rotation, which extends in the radial direction, and specifically, is a portion extending outward in the radial direction of the body portion 29 from the body portion 29 in this embodiment.
  • a pair of hooks 35 are provided in the vicinity of a distal end of the fixing-arm portion 31 .
  • the pair of hooks 35 are a pair of protruding portions vertically standing on a surface opposite to the above-mentioned another surface 1.5a, on which the elongated holes 21 are formed, specifically, a surface on the side which faces a corresponding one of the movable bodies 3 at the time of completion of assembly. Then, when the brake is to be manually released, the above-mentioned projection 3a of the corresponding one of the movable bodies 3 is inserted between the pair of hooks 35.
  • Each of the elongated holes 21 is a recess which is open on the above-mentioned another surface 15a of the body portion 29.
  • the elongated holes 21 have a form for partially housing the rolling bodies 17 therein and are arranged about the relative rotation axis CL, each extending in an arc-like shape. Further, as illustrated in FIG. 7 , each of the elongated holes 21 has a shape which corresponds to a locus obtained when a circle is moved in an arc-like manner in plan view.
  • An inner-surface shape of each of the elongated holes 21 corresponds to an outer shape of each of the rolling bodies 17, and specifically, is a shape which corresponds to a locus obtained when a spherical surface is moved in an arc-like manner in this embodiment, as illustrated in FIG. 8 .
  • a depth of each of the elongated holes 21 changes in accordance with the position in a direction in which each of the elongated holes 21 extends in the arc-like manner, as illustrated in FIG. 8 .
  • each of the elongated holes 21 is formed so that a depth for housing a corresponding one of the rolling bodies 17 therein changes when the rolling body 17 moves along the elongated hole 21.
  • each of the rolling bodies 17 can move along a direction in which the elongated holes 21 extend while rolling inside a corresponding one of the elongated holes 21.
  • the depth for housing each of the rolling bodies 17 (in other words, a height of a part of each of the rolling bodies 17, which is exposed from a corresponding one of the elongated holes 21) changes in accordance with the movement of the rolling bodies 17.
  • the three elongated holes 21 are arranged on a circumference having a single radius about the center (relative rotation axis CL) of the body portion 29 in plan view. Further, each of the elongated holes 21 is separated from another adjacent one of the elongated holes 21 at an equiangular distance (approximately 120 degrees between the centers of the elongated holes in the circumferential direction in this embodiment) in plan view.
  • Each of the rolling bodies 17 is partially housed in a corresponding one of the supporting holes 19 having the configuration described above on one side, and is partially housed in a corresponding one of the elongated holes 21 having the configuration described above on the other side. Specifically, each of the rolling bodies 17 is housed in both a corresponding one of the supporting holes 19 and a corresponding one of the elongated holes 21 between the movable bodies 3 and the fixed base 5. As a result, a distance between each of the movable bodies 3 and the fixed base 5 in the direction of the relative rotation axis CL varies in accordance with a rotating operation of the movable bodies 3 and the fixed base 5 relative to each other, specifically, in accordance with the positions of the rolling bodies 17 in the elongated holes 21.
  • the brake release mechanism further includes a cover member and a plurality of collars.
  • the cover member and the plurality of collars are described referring to FIGS. 2 and 9.
  • FIG. 9 is a view for illustrating the vicinity of one of the collars in an enlarged manner in association with FIG. 2 .
  • a cover member 37 is provided so that the movable lever 13 is interposed between the cover member 37 and the fixed lever 15.
  • Each of collars 39 is a cylindrical member and is provided between the cover member 37 and the fixed lever 15 so as to maintain a distance between the cover member 37 and the fixed lever 15.
  • a collar screw 41 is inserted. By the collar screws 41, the cover member 37 and the fixed lever 15 are connected to each other.
  • the brake release mechanism further includes a securing portion.
  • the securing portion does not secure the position of one of the movable lever 13 and the fixed lever 15 in the direction of the relative rotation axis CL but secures the position of another thereof in the direction of the relative rotation axis CL.
  • the securing portion is formed of a release bolt fixed to the fixed base 5. The securing portion is described referring to FIGS. 10 and 11 .
  • FIG. 10 is a view in the same mode as that of FIG. 1 , for illustrating a state in which the brake release mechanism is assembled to the hoisting-machine brake.
  • FIG. 11 is a sectional view taken along the line XI-XI in FIG. 10 .
  • a release bolt 43 corresponding to the securing portion passes through the movable lever 13 and the fixed lever 15 so as to extend along the relative rotation axis CL, specifically, is inserted into the through holes 27 and 33 described above.
  • a distal end of the release bolt 43 is screwed into the fixed base 5.
  • a head of the release bolt 43 has a larger outer diameter than that of the through hole 27, and is exposed on an opposite surface 13b to the one surface 13a of the movable lever 13, on which the supporting holes 19 are formed, so as to sit on the opposite surface 13b.
  • a hole for the escape of the head is provided so as not to prevent the head of the release bolt 43 from sitting on the opposite surface 13b.
  • FIG. 12 is a view for illustrating a plane taken along the line XII-XII in FIG. 10 .
  • the movable lever 13 and the fixed lever 15 of the break release mechanism are provided on the side of each of the movable bodies 3, which is opposite to the fixed base 5, as illustrated in FIGS. 10 and 11 .
  • the movable lever 13 and the fixed lever 15 are provided to have the relation in which the fixed lever 15 is provided on the side closer to a corresponding one of the movable bodies 3. Further, as illustrated in FIGS.
  • the projection 3a of the corresponding one of the movable bodies 3 is inserted between the pair of hooks 35 of the fixed lever 15.
  • Each of the rolling bodies 17 is located at the portion with the maximum depth Xmax in a corresponding one of the elongated holes 21.
  • An example of a mounting procedure is described. First, the pair of hooks 35 of the fixed lever 15 are brought into engagement with the projection 3a of the corresponding one of the movable bodies 3. Subsequently, the release bolt 43 is inserted into the through holes 27 and 33 to be screwed into the fixed base 5. In this manner, the head of the release bolt 43 is brought into close abutment on the opposite surface 13b of the movable lever 13.
  • the movable lever 13 is rotated as indicated by the arrow R in FIG. 12 . Then, the rotation of the fixed lever 15 in the direction of the relative rotation is blocked by the corresponding one of the movable bodies 3 due to the engagement between the hooks 35 and the projection 3a. Specifically, the fixed lever 15 does not rotate, but only the movable lever 13 rotates. Therefore, the relative rotation occurs between the movable lever 13 and the fixed lever 15.
  • each of the rolling bodies 17 changes the position in synchronization with (together with) a corresponding one of the supporting holes 19 due to the arc-like movement of the supporting holes 19 provided on the rotating movable lever 13, and hence moves to the portion with the minimum depth Xmin while rolling inside a corresponding one of the elongatedholes 21.
  • the increase in distance between the movable lever 13 and the fixed lever 15 appears as the movement of the fixed lever 15 in the direction of the relative rotation axis CL away from the movable lever 13. Therefore, the corresponding one of the movable bodies 3 is subjected to a pressing force in the direction of the relative rotation axis CL from the fixed lever 15 so as to move closer to the fixed base 5 against the elastic force of the elastic body 11.
  • one of the brake shoes 9, which is provided integrally with the corresponding one of the movable bodies 3, separates from the inner circumferential surface of the rotor 7 to achieve the manual release of the brake.
  • the distance can be changed so that the movable lever 13 and the fixed lever 15 do not interfere with each other at the time of the brake releasing operation.
  • the rolling bodies 17 interposed therebetween can be prevented from dropping off.
  • a large frictional force due to surface contact over a wide area is advantageously prevented from being generated in a movable portion. More specifically, the friction generated due to the rotation of the movable lever can be absorbed by the rotation of the rolling bodies themselves. As aresult, effort required for the manual brake releasing operation can be significantly reduced. Moreover, the brake can be forcibly released by only applying a vertical turning force to the hoisting machine. Therefore, it is not necessary to provide a large space for the releasing operation on the side of the hoisting machine, which can lead to space saving of a hoistway and a machine room.
  • any securing portion which can provide the function of securing the position of one of the movable lever (first member) and the fixed lever (second member) in the direction of the relative rotation axis CL without securing the position of another thereof in the direction of the relative rotation axis CL. Therefore, the securing portion is not limited to a single independent member as in the embodiment described above as long as the function described above can be provided, and may be a part of the first member or the second member, a part of the fixed base, or a part of another element.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Braking Arrangements (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
EP10853667.3A 2010-06-25 2010-06-25 Brake release mechanism Withdrawn EP2586739A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2010/060828 WO2011161807A1 (ja) 2010-06-25 2010-06-25 ブレーキ解放機構

Publications (1)

Publication Number Publication Date
EP2586739A1 true EP2586739A1 (en) 2013-05-01

Family

ID=45371019

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10853667.3A Withdrawn EP2586739A1 (en) 2010-06-25 2010-06-25 Brake release mechanism

Country Status (5)

Country Link
EP (1) EP2586739A1 (zh)
JP (1) JPWO2011161807A1 (zh)
KR (1) KR20130043641A (zh)
CN (1) CN102958820A (zh)
WO (1) WO2011161807A1 (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI549896B (zh) * 2014-09-30 2016-09-21 Fong Hwang Entpr Co Ltd Lifting equipment for power failure Safe decoupling escape switch
WO2018216111A1 (ja) * 2017-05-23 2018-11-29 三菱電機株式会社 エレベータ用ブレーキ開放装置
KR102341995B1 (ko) * 2021-08-30 2021-12-21 김정록 승강기용 시브제동장치
KR102341994B1 (ko) * 2021-08-30 2021-12-21 김정록 승강기용 시브제동장치

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5922890A (ja) * 1982-07-26 1984-02-06 山久チエイン株式会社 巻上機
JP4684015B2 (ja) 2005-06-07 2011-05-18 三菱電機株式会社 エレベータ巻上機用ブレーキの手動開放装置及びそのブレーキの手動開放方法
MY151628A (en) * 2006-05-29 2014-06-30 Inventio Ag Lift facility with a braking device and method for braking a lift facility
IL186678A0 (en) * 2006-11-16 2008-02-09 Inventio Ag Brake equipment, lift installation, a method for detecting a function of the brake equipment, and a modernisation set
MY143851A (en) * 2006-12-05 2011-07-15 Inventio Ag Braking device for holding and braking a lift cabin in a lift facility

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011161807A1 *

Also Published As

Publication number Publication date
WO2011161807A1 (ja) 2011-12-29
KR20130043641A (ko) 2013-04-30
CN102958820A (zh) 2013-03-06
JPWO2011161807A1 (ja) 2013-08-19

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