EP2206674B1 - Hebevorrichtung für aufzug und bremssystem - Google Patents

Hebevorrichtung für aufzug und bremssystem Download PDF

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Publication number
EP2206674B1
EP2206674B1 EP07828983.2A EP07828983A EP2206674B1 EP 2206674 B1 EP2206674 B1 EP 2206674B1 EP 07828983 A EP07828983 A EP 07828983A EP 2206674 B1 EP2206674 B1 EP 2206674B1
Authority
EP
European Patent Office
Prior art keywords
braking
bowl
base
shaped portions
movable core
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.)
Not-in-force
Application number
EP07828983.2A
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English (en)
French (fr)
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EP2206674A1 (de
EP2206674A4 (de
Inventor
Koji Ogawa
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
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Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP2206674A1 publication Critical patent/EP2206674A1/de
Publication of EP2206674A4 publication Critical patent/EP2206674A4/de
Application granted granted Critical
Publication of EP2206674B1 publication Critical patent/EP2206674B1/de
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Anticipated expiration legal-status Critical

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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
    • B66B11/043—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
    • 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 a hoisting machine for driving an elevator, and particularly relates to a braking device for braking the elevator by pressing a braking drum by a braking member, and a hoisting machine including the braking device.
  • a conventional hoisting machine includes a braking drum rotating around a main shaft, a braking member that is disposed at an inner circumference side of the braking drum and brakes a rotation, and an arm that is disposed at an inner circumference side of the braking drum and pivotally supported by a fixing portion at one end portion of the arm.
  • the braking member is connected to a center portion of the arm, and the braking member is pressed against and separated from the braking drum by a rotation of the arm. Thereby, the braking operation or the brake releasing operation of the hoisting machine is performed.
  • a pressure spring for pressing the arm toward the braking drum is disposed at the other end portion that is the opposite side of the pivotally supporting portion of the arm.
  • the braking member presses the braking drum by the pressure spring with the principle of leverage, and the rotation of the braking drum is braked by a frictional force generated in a rotational direction.
  • the pivotally supporting portion of the arm is apart from an operation point of the frictional force of the braking member so as to generate rotational moment on the arm by the frictional force of the braking member.
  • two braking members and two arms are provided and disposed symmetrically with respect to the rotation center of the braking drum (refer to Patent Document 1).
  • another conventional hoisting machine includes a braking drum rotating around a main shaft, a braking member that is disposed at an inner circumference side of the braking drum and brakes the rotation, and an electromagnet mechanism that is connected in series with the braking member in a direction in which the braking member presses the braking drum.
  • the electromagnet mechanism includes a movable core and a stationary core by which the movable core is pulled by an electromagnetic coil and pressed by a pressure spring.
  • the braking member is pressed against and separated from the braking drum by movements of the movable core in forward and backward directions with respect to the stationary core by the electromagnet mechanism. Thereby, the braking operation or the brake releasing operation of the hoisting machine is performed.
  • two braking devices are provided and disposed symmetrically with respect to the rotation center of the braking drum (refer to Patent Document 2).
  • the above-described hoisting machines include two braking devices, and even when one braking device is not operated due to some troubles, the other braking device is operated, and the hoisting machine can be stopped.
  • Patent Publication EP 15 68 645 shows a braking device according to the state of the art.
  • the pivotally supporting portion of the arm is apart from an operation point of the frictional force of the braking member so as to generate rotational moment on the arm by the frictional force of the braking member.
  • the pressing force of the pressure spring can be set smaller than the pressing force of the braking member, according to a ratio of the distances from the pivotally supporting portion of the arm to the braking member, and to the pressure spring, in other words, according to a leverage-ratio.
  • the pressing force must be increased more than required in order to compensate the decrease of the braking torque so that the braking device gets larger.
  • the present invention has been made to solve above-described problems, and an object of the invention is to provide a braking device and a hoisting machine which can be miniaturized while the braking torque does not depend on a rotational direction of a braking drum.
  • An elevator hoisting machine and a braking device of the present invention include a stationary core having an electromagnetic coil for generating an electromagnetic force and a pressure spring that generates a force to oppose the electromagnetic force, a movable core that is separated or pressed with respect to the stationary core by the electromagnetic coil and the pressure spring, and a braking member that is mounted on the movable core and brakes a braking drum, whereby the movable core is pivotally supported with respect to a shaft center, which is tangentially extended in a rotational direction of the braking drum, and rotated by the stationary core, and the braking member is pressed or separated with respect to the braking drum.
  • a movable core is pivotally supported with respect to a shaft center, which is tangentially extended in a rotational direction of a braking drum.
  • Fig. 1 is a front view illustrating a half cross section of a hoisting machine according to Embodiment 1 for carrying out the present invention.
  • Fig. 2 is a cross-sectional view taken along Line A-A in Fig. 1 .
  • Fig. 3 is a magnified view illustrating main portions in Fig. 1
  • Fig. 4 is a magnified view illustrating main portions in Fig. 2 .
  • bowl-shaped portions 1a open in one direction are formed on the outside of a base 1, and a bottom portion 1b connecting the bowl-shaped portions 1a with each other is formed on the inside of the base 1.
  • a stationary core 2 is fastened to the bottom portion 1b by bolts 3 from the opposite side of the open side of the bowl-shaped portions 1a.
  • a main shaft 4 is provided in the center portion of the stationary core 2 so as to protrude in a direction of the open side of the bowl-shaped portions 1a, and a rotary unit 5 is rotatably supported by the main shaft 4 via bearings 4a.
  • the rotary unit 5 has a bowl shape and is open in one direction, and is disposed in such a way that its bottom faces the bottom portion 1b of the base 1.
  • a drive sheave 6 is provided on a bottom side of the rotary unit 5.
  • a hoist rope, not shown, is winded around the drive sheave 6, and an elevator car suspended by the hoist rope is moved up and down by rotating the drive sheave 6.
  • a braking drum 7 having a cylindrical shape is provided on the open side of the rotary unit 5. The braking drum 7 is disposed so as to be inserted to the bowl-shaped portions 1a of the base 1.
  • Field magnets 8 are attached to the outer circumference of the braking drum 7, and stator windings 9 are provided on the inner circumference of the bowl-shaped portions 1a of the base 1 so as to face the field magnets 8.
  • a motor 10 is configured with the field magnets 8 and the stator windings 9.
  • a braking surface 11 is provided on the inner circumference of the braking drum 7.
  • Two braking devices 12 are provided on the left and right sides symmetrically with respect to the rotation center of the braking drum 7, and disposed on the inner circumference side of the braking drum 7.
  • the braking devices 12 are configured as described below. To explain simply, the configuration of a braking device on one side will be explained.
  • a braking member 13 is provided so as to face the braking surface 11.
  • the braking drum 7 is braked by pressing the braking member 13 against the braking surface 11, so that the hoisting machine is stopped.
  • the stationary core 2 has an attraction surface 2a facing the braking surface 11, and an electromagnetic coil 2b on which a coil is winded is provided. Electromagnetic force is generated on the attraction surface 2a by energizing the electromagnetic coil 2b.
  • pressure springs 14 are provided in parallel with the electromagnetic coil 2b. The pressure springs 14 generate pressing forces to oppose the electromagnetic force of the electromagnetic coil 2b.
  • adjusting bolts 14b are provided via supporting plates 14a at sides opposite to the pressing sides of the pressure springs 14. By rotating the adjusting bolts 14b, the length of the pressure springs 14 are varied via the supporting plates 14a to adjust the pressing force.
  • supporting portions 16 are provided at both sides of a movable core 15 so that the movable core 15 is fitted therein.
  • the movable core 15 has a plate shape, and is disposed between the braking member 13 and the attraction surface 2a to face the attraction surface 2a.
  • the movable core 15 is pivotally supported with respect to a shaft center 17, which is tangentially extended in a rotational direction of the braking drum 7. The pivotal supporting is performed as described below.
  • Pins 18 having the shaft center 17 are provided at both ends of the movable core 15 on the bottom side of the braking drum 7, and the pins 18 are rotatably connected to the supporting portions 16 of the stationary core 2.
  • the pressure spring 14 is arranged to press the attraction surface 2a side of the movable core 15.
  • the movable core 15 opposes the pressing force of the pressure spring 14 by the electromagnetic force of the electromagnetic coil 2b and rotates so as to contact with the attraction surface 2a. Moreover, by interrupting the current to the electromagnetic coil 2b, the movable core 15 rotates so as to get away from the attraction surface 2a by the pressure spring 14.
  • the braking member 13 is mounted on the other side of the movable core 15. A position at which the braking member 13 presses the braking surface 11, in other words, a position at which the braking member 13 is mounted on the movable core 15, is set between a position at which the electromagnetic coil 2b pulls and the pressure spring 14 presses and the position of the shaft center 17.
  • the braking member 13 is rotatably mounted on the movable core 15 via a rotary mechanism 20.
  • the rotary mechanism 20 includes a spherical shaft 21 and a spherical concave member 22.
  • the spherical shaft 21 has a rod shape, and includes a spherical portion 21b having a convex spherical surface 21a jutting in a direction of forward movement of the braking member 13 at the tip of the shaft, and a screw 21c having a diameter smaller than a diameter of the spherical portion 21b at the base of the shaft.
  • the spherical shaft 21 is fixed to the movable core 15 by clamping the screw 21c and a stopper nut 23 with each other.
  • the spherical concave member 22 has a disc shape and includes a concave spherical surface 22a, which is fitted to the spherical surface 21a of the spherical portion 21b; and its bottom is attached in contact with the braking member 13.
  • a recess 24 is formed in the braking member 13, and the spherical concave member 22 is fitted to the recess 24.
  • the recess 24 is open on the bottom side of the braking drum 7.
  • two plate springs 25 having a nearly "Z" shape are attached on both sides of the spherical shaft 21.
  • one end portion is in contact with a side opposite to the spherical surface 21a of the spherical portion 21b, and the other end portion is attached to the braking member 13.
  • Guide portions 26 are integrally formed on the inside of the bowl-shaped portion 1a of the base 1.
  • the guide portions 26 are formed at both end portions of the braking member 13 in a rotational direction of the braking drum 7. Moreover, the guide portions 26 slidably guide movements of the braking member 13 for in forward/backward directions with respect to the braking drum 7.
  • the stator windings 9 are energized to excite the field magnets 8, whereby the rotary unit 5 is rotated.
  • the electromagnetic force opposing the pressing force of the pressure spring 14 is generated by energizing the electromagnetic coil 2b, and the movable core 15 is rotated around the shaft center 17 so as to be brought into contact with the attraction surface 2a.
  • the braking member 13 is guided by the guide portion 26 and separated from the braking drum 7, and the braking is released.
  • a driving operation of the motor is stopped by interrupting the current to the stator windings 9.
  • the electromagnetic force is terminated by interrupting the current to the electromagnetic coil 2b, and the pressure springs 14 press the movable core 15.
  • the movable core 15 is rotated around the shaft center 17 so as to be apart from the attraction surface 2a.
  • the braking member 13 is guided and moved forward by the guide portion 26 and then presses the braking drum 7 to generate the braking torque.
  • the rotary unit 5 is braked.
  • the braking member 13 When the braking member 13 is inclined with respect to the braking surface 11, the braking member 13 is rotated with respect to the movable core 15 by the rotary mechanism 20 and fitted to the braking surface 11. At this time, the rotary mechanism 20 is operated as described below. In a state where the spherical surface 21a is fitted to the spherical surface 21a, the spherical concave member 22 rotates along the spherical surface with respect to the spherical shaft 21, whereby the braking member 13 is rotated with respect to the movable core 15.
  • the plate springs 25 support the spherical portion 21b and the spherical concave member 22 by their spring force, and the braking member 13 is separated from the braking surface 11 with its attitude being fitted to the braking surface 11. Although a force is generated in a tangential direction of the braking surface 11 on the braking member 13, the force is sustained by the guide portion 26.
  • the hoisting machine according to Embodiment 1 of the present invention can provide effects as described below.
  • the braking member 13 is mounted on the movable core 15, and the movable core 15 is pivotally supported with respect to the shaft center 17, which is tangentially extended in a rotational direction of the braking drum 7.
  • the braking member 13 presses and brakes the braking surface 11 of the braking drum 7, the braking force which is generated in a rotational direction of the braking drum 7, in other words, the frictional force of the braking member 13, is not operated in a rotational direction of the movable core 15, so that the force of the pressure springs 14 pressing the movable core 15 is not affected by the braking force.
  • the pressure springs 14 are not required to be formed larger than a required size, and the braking device 12 can be miniaturized.
  • the position at which the braking member 13 presses the braking surface 11 is set between the pressing position of the pressure spring 14 and the position of the shaft center 17of the pin 18.
  • the pressing force of the pressure springs 14 can be set smaller than the pressing force of the braking member 13 toward the braking surface 11, and the braking device 12 can be miniaturized.
  • the position at which the braking member 13 presses the braking surface 11 is set between the pulling position of the electromagnetic coil 2b and the shaft center 17 of the pin 18. Therefore, according to the principle of leverage, the attractive force by the electromagnetic force of the electromagnetic coil 2b can be set smaller than the pressing force of the braking member 13 against the braking surface 11, and the electromagnetic coil 2b can be miniaturized.
  • the braking member 13 is rotatably mounted on the movable core 15 via the rotary mechanism 20. Thereby, the braking member 13 presses the braking surface 11 so as to be fitted while braking, so that a stable braking torque can be achieved. Moreover, the braking member 13 is separated from the braking surface 11 with its attitude being fitted to the braking surface 11 when the braking is released so that a gap between the braking member 13 and the braking surface 11 can be certainly ensured. Thereby, the braking member 13 does not touch the braking surface 11 when the braking drum 7 is rotated, so that a reliable braking device can be achieved.
  • the screw 21c is formed at the base of the spherical shaft 21 and fixed to the movable core 15 by clamping the screw 21c and the stopper nut 23 with each other.
  • a protrusion amount from the movable core 15 is adjusted by the screw function of the screw 21c, and the rotation amount of the movable core 15, in other words, the forward/backward shift amount of the braking member 13, is adjusted.
  • the forward/backward shift amount of the braking member 13 can be adjusted by a simple operation of rotating the spherical shaft 21.
  • the adjusting bolts 14b are provided via the supporting plates 14a at sides opposite to the pressing sides of the pressure springs 14. Thereby, the pressing force of the pressure springs 14 can be adjusted by a simple operation of rotating the adjusting bolts 14b, and the braking torque can be adjusted.
  • the recess 24 is formed on the braking member 13, and the spherical concave member 22 is fitted to the recess 24. Thereby, the distance between the movable core 15 and the braking member 13 can be reduced, and the braking device 12 can be miniaturized.
  • the recess 24, which is wider than the width of the spherical concave member 22, is open on the bottom side of the braking drum 7. Moreover, in order to clamp the spherical surface 21a and the spherical concave member 22 by the plate springs 25 having a nearly "Z" shape, one end portion is in contact with the spherical portion 21b of the spherical shaft 21, and the other end portion is attached to the braking member 13.
  • the braking member 13 can be demounted by pressing plate springs 25 to open without demounting the movable core 15 or the stationary core 2 from the hoisting machine. Accordingly, the braking member 13 can be replaced without demounting the whole braking device from the hoisting machine, and the maintenance work can be easily performed.
  • the movable core 15 is pivotally supported by the supporting portion 16 of the stationary core 2, and the guide portions 26 are provided on both end portions of the braking member 13 in a rotational direction of the braking drum 7.
  • the guide portions 26 are formed on the base 1 so as to slidably guide movements of the braking member 13 in forward/backward directions. Thereby, the braking member 13 can be smoothly brought into contact with or separated from the braking surface 11.
  • the guide portions 26 sustain the braking force that is generated on the braking member 13 in a rotational direction of the braking drum 7. Therefore, the movable core 15 and the stationary core 2 need not support the force, and the braking device 12 can be miniaturized.
  • the hoisting machine includes the base 1, in which the bowl-shaped portions 1a open in one direction are formed on the outside of the base 1, and the bottom portion 1b connecting the bowl-shaped portions 1a with each other is formed on the inside of the base 1, and the stationary core 2 is connected to the bottom portion 1b by the bolts 3 from the opposite side of the open side of the bowl-shaped portions 1a.
  • the main shaft 4 is provided in the center portion of the stationary core 2 so as to protrude in a direction of the open side of the bowl-shaped portion 1a, and the rotary unit 5 is rotatably supported by the main shaft 4.
  • the rotary unit 5 has a bowl shape and is open in one direction, and the bottom of the rotary unit 5 is faced to the bottom portion 1b of the base 1 and disposed, and the drive sheave 6 is provided on the bottom side of the rotary unit 5.
  • the braking drum 7 having the braking surface 11 on the inner circumference is provided on the open side of the rotary unit 5.
  • the braking device 12 is disposed on the inner circumference side of the braking drum 7.
  • the field magnets 8 are attached to the outer circumference of the braking drum 7, and the stator windings 9 are provided on the inner circumference of the bowl-shaped portion 1a of the base 1 to face the field magnets 8, whereby the motor 10 is configured.
  • a thickness in an axial direction and a diameter of an outer circumference of the hoisting machine can be reduced, and the hoisting machine can be miniaturized.
  • Fig. 5 is a front view illustrating a half cross section of a hoisting machine according to Embodiment 2 for carrying out the present invention.
  • Fig. 6 is a cross-sectional view taken along Line B-B in Fig. 5 .
  • Fig. 7 is a magnified view illustrating main portions in Fig. 5
  • Fig. 8 is a magnified view illustrating main portions in Fig. 5 .
  • the movable core 15 is pivotally supported by the stationary core 2 in the braking device 12 according to Embodiment 1, whereas a movable core 32 is pivotally supported by a base 31 in a braking device 30 according to Embodiment 2.
  • Bowl-shaped portions 31a open in one direction are formed on the outside of the base 31, and a bottom portion 31b connecting the bowl-shaped portions 31a with each other is formed on the inside of the base 31.
  • a stationary core 2 is fastened to the bottom portion 31b by bolts 3 from the opposite side of the open side of the bowl-shaped portion 31a.
  • the base 31 includes supporting portions 31c at both sides of the movable core 32 so that the movable core 32 is fitted therein.
  • the movable core 32 includes a guide portion 32a that protrudes with a square U-shaped cross section.
  • a braking member 13 is disposed at an inner circumference side of a braking drum 7 to face a braking surface 11 so as to be fitted to the inside of the guide portion 32a of the movable core 32.
  • the square U-shaped bottom portion of the movable core 32 is disposed to face an attraction surface 2a.
  • the movable core 32 is pivotally supported with respect to a shaft center 33, which is tangentially extended in a rotational direction of the braking drum 7. The pivotal supporting is performed as described below.
  • Pins 34 having the shaft center 33 provided at both ends of the movable core 32 on the bottom side of the braking drum 7, and the pins 34 are rotatably connected to the supporting portions 31c of the base 31.
  • Embodiment 1 The other components are the same as those in Embodiment 1, and detailed explanations are omitted.
  • the symbols which are the same as those in Embodiment 1 indicate equivalent parts.
  • the electromagnetic force opposing the pressing force of the pressure springs 14 is generated by energizing the electromagnetic coil 2b, and the movable core 32 is rotated around the shaft center 33 so as to be brought into contact with the attraction surface 2a.
  • the braking member 13 is separated from the braking drum 7 with the braking member 13 being engaged with the guide portion 32a of the movable core 32, so that the braking is released.
  • the electromagnetic force is terminated by interrupting the current to the electromagnetic coil 2b, and the pressure springs 14 press the movable core 32.
  • the movable core 32 is rotated around the shaft center 33 so as to press the braking member 13 against the braking drum 7.
  • the braking member 13 presses the braking drum 7 with the braking member 13 being engaged with the guide portion 32a of the movable core 32, to generate the braking torque.
  • the rotary unit 5 is braked.
  • the force is transmitted to the guide portion 32a of the movable core 32 and sustained by the pins 34 on both sides.
  • the movable core 32 is moved in a direction of the force and brought into contact with the supporting portion 31c of the base 31, the force is sustained by the contact portion as well.
  • the hoisting machine according to Embodiment 2 of the present invention can provide the same effects as those in Embodiment 1 as well as the effects as described below. Because the braking member 13 is engaged with the guide portion 32a of the movable core 32, the braking member 13 moves, with a path synchronizing with the rotation path of the movable core 32, in a forward/backward direction with respect to the braking drum 7. Moreover, the braking member 13 moves with its attitude being kept, in a forward/backward direction with respect to the movable core 32. Therefore, when the braking is released, an inclination by which a gap between the braking member 13 and the braking surface 11 is reduced does not occur. Accordingly, the braking can be released with the sufficient gap being kept, so that a reliable hoisting machine can be achieved.
  • Fig. 9 is a front view illustrating a half cross section of a hoisting machine according to Embodiment 3 of the present invention.
  • Fig. 10 is a cross-sectional view taken along Line C-C in Fig. 9 .
  • Fig. 11 is a magnified view illustrating main portions in Fig. 9
  • Fig. 12 is a magnified view illustrating main portions in Fig. 10 .
  • the braking devices 12 are disposed at an inner circumference side of the braking drum 7 in Embodiment 1, whereas braking devices 40 are disposed at an outer circumference side of a braking drum 41 in Embodiment 3.
  • bowl-shaped portions 42a open in one direction are formed on the outside of a base 42, and a bottom portion 42b connecting the bowl-shaped portions 42a with each other is formed on the inside of the base 42.
  • Brake mounting portions 42c are provided on both sides of the outer circumference of the bowl-shaped portions 42a.
  • the braking devices 40 are fastened to the brake mounting portions 42c by the bolts 3.
  • the main shaft 4 is provided in the center portion of the bottom portion 42b so as to protrude in a direction of the open side of the bowl-shaped portions 42a, and a rotary unit 43 is rotatably supported by the main shaft 4 via bearings 4a.
  • the rotary unit 43 has a bowl shape and is open in one direction, and is disposed in such a way that its bottom faces the bottom portion 42b of the base 42.
  • the drive sheave 6 is provided on a bottom side of the rotary unit 43.
  • the braking drum 41 having a cylindrical shape is provided on an open side of the rotary unit 43. The braking drum 41 is disposed so as to be inserted to the bowl-shaped portion 42a of the base 42.
  • the field magnets 8 are attached to the outer circumference of the braking drum 41, and the stator windings 9 are provided on the inner circumference of the base 42 so as to face the field magnets 8. Moreover, a braking surface 44 is provided on the outer circumference of the braking drum 41 neighboring the field magnet 8, two braking devices 40 are provided on the left and right sides symmetrically with respect to the rotation center of the braking drum 41, and disposed on the outer circumference of the braking drum 41. To explain simply, the configuration of the braking device on one side will be explained.
  • a braking member 45 is provided to face the braking surface 44. By pressing the braking surface 44 by the braking member 45, the braking drum 41 is braked, and the hoisting machine is stopped.
  • the braking member 45 is mounted on the movable core 15 via the rotary mechanism 20.
  • the movable core 15 is pivotally supported by the stationary core 2 via the pins 18 in a similar way to Embodiment 1.
  • the stationary core 2 is fastened to the brake connecting members 42c by the bolts 3.
  • the movable core 15 is rotated by the stationary core 2 in a similar way to Embodiment 1, and the braking member 45 presses the braking surface 44, or the braking member 45 is separated from the braking surface 44. Thereby, the braking operation or the brake releasing operation is performed.
  • Embodiment 1 The other components are the same as those in Embodiment 1, and detailed explanations are omitted.
  • the symbols which are the same as those in Embodiment 1 indicate equivalent parts.
  • the hoisting machine according to Embodiment 3 of the present invention can provide the same effects as those in Embodiment 1. Because the braking devices 40 are disposed on the outer circumference side of the braking drum 41, a thickness in an axial direction of the hoisting machine according to Embodiment 3 is greater than that of the hoisting machine according to Embodiment 1, but the radial position on which the braking member 13 is brought into contact with the braking surface 44 can be increased, so that the pressing force of the braking member 13 can be decreased. Thereby, the braking device can be miniaturized.
  • an elevator hoisting machine related to the present invention is suitable to be used as a driving device by which an elevator car is moved up/down and stopped at boarding floors.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Braking Arrangements (AREA)

Claims (9)

  1. Bremsvorrichtung mit:
    einer Bremstrommel (7), die in einer Hebevorrichtung zum Antreiben eines Fahrstuhls angeordnet ist und in Rotation versetzt wird, und eine Bremsfläche (11) aufweist;
    einem Bremselement (13), das derart angeordnet ist, dass es der Bremsfläche gegenüberliegt, sich bezüglich der Bremsfläche in eine vor- und zurück-Richtung bewegt und die Bremstrommel bremst;
    einer elektromagnetischen Spule (2b), auf die eine Spule gewickelt ist, zum Erzeugen einer elektromagnetischen Kraft durch Versorgen der Spule mit Energie;
    einem stationären Kern (2) zum Anbringen der elektromagnetischen Spule;
    einer Druckfeder (14), die an dem stationären Kern angebracht ist und eine Kraft erzeugt, die der elektromagnetischen Kraft der elektromagnetischen Spule entgegengerichtet ist; und
    einem bewegbaren Kern (15), der bezüglich einer Achsenmitte (17), die sich in einer Drehrichtung der Bremstrommel tangential erstreckt, drehbar abgestützt ist und durch die elektromagnetische Spule und die Druckfeder derart gedreht wird, dass er das Bremselement gegen die Bremsfläche drückt und von dieser trennt.
  2. Bremsvorrichtung nach Anspruch 1, bei der eine Position, an der das Bremselement gegen die Bremsfläche drückt, zwischen der Achsenmitte und zumindest einer Position, an der die Druckfeder gegen den bewegbaren Kern drückt, und einer Position, an der die elektromagnetische Spule den bewegbaren Kern anzieht, eingestellt ist.
  3. Bremsvorrichtung nach Anspruch 1, ferner mit einem Drehmechanismus (20), um das Bremselement drehbar an dem bewegbaren Kern anzubringen.
  4. Bremsvorrichtung nach Anspruch 3, bei welcher der Drehmechanismus aufweist:
    eine sphärische Achse (21), die an der Achsenspitze eine konvexe, sphärische Fläche (21a) aufweist und an dem bewegbaren Kern derart befestigt ist, dass sie den Versatzbetrag vor und zurück des Bremselements einstellt; und
    ein sphärisches, konkaves Element (22), das eine Scheibenform und eine konkave, sphärische Fläche (22a) aufweist, die an die konvexe, sphärische Fläche gepasst ist und an dem Bremselement angebracht ist.
  5. Bremsvorrichtung nach Anspruch 4, bei der eine Ausnehmung (24), welche breiter als ein Außendurchmesser des sphärischen, konkaven Elements ist, derart ausgebildet ist, dass sie auf beiden Seiten des Bremselements geöffnet ist.
  6. Bremsvorrichtung nach einem der Ansprüche 1 bis 5, bei der eine Einstelleinrichtung (14b) zum Einstellen einer Presskraft der Druckfeder an dem stationären Kern angeordnet ist.
  7. Hebevorrichtung mit:
    einer Bremsvorrichtung nach einem der Ansprüche 1 bis 5, bei welcher der bewegbare Kern in dem stationären Kern drehbar abgestützt ist, und welche die Bremsfläche an einem Innenumfang der Bremstrommel aufweist;
    einer Basis (1), bei der in einer Richtung offene, schüsselförmige Abschnitte außen ausgebildet sind, und ein Bodenabschnitt (1b), welcher die schüsselförmigen Abschnitte miteinander verbindet, innen ausgebildet ist;
    einem Führungsabschnitt (26), der an der Innenseite der schüsselförmigen Abschnitte der Basis angeordnet ist und Bewegungen des Bremselements in der vor- und zurück-Richtung bezüglich der Bremstrommel gleitend führt;
    einer Hauptachse (4), die in dem Mittelabschnitt des stationären Kerns angeordnet ist, der an dem Bodenabschnitt der Basis derart angebracht ist, dass er in Richtung der offenen Seite der schüsselförmigen Abschnitte der Basis vorsteht;
    einer Dreheinheit (5), die durch die Hauptachse drehbar abgestützt ist, eine Schüsselform aufweist, auf einer Seite offen ist und derart angeordnet ist, dass ihr Boden zum Bodenabschnitt der Basis gerichtet ist;
    einer Treibscheibe (6), die an einer Bodenseite der Dreheinheit angeordnet ist;
    einem Feldmagneten (8), der an dem Außenumfang der Bremstrommel angebracht ist, die an der offenen Seite der Dreheinheit angeordnet ist; und
    einer Statorwicklung (9), die an dem Innenumfang der schüsselförmigen Abschnitte der Basis derart angeordnet ist, dass sie zum Feldmagneten gerichtet ist und zusammen mit dem Feldmagneten einen Motor bildet.
  8. Hebevorrichtung mit:
    einer Bremsvorrichtung nach einem der Ansprüche 1 bis 5, bei welcher der bewegbare Kern einen Führungsabschnitt (26) aufweist, der mit einem quadratischen, U-förmigen Querschnitt vorsteht, und das Bremselement (13) derart angeordnet ist, dass es in den Führungsabschnitt eingepasst ist, und welche die Bremsfläche an einem Innenumfang der Bremstrommel aufweist;
    einer Basis (1), bei der in einer Richtung offene, schüsselförmige Abschnitte außen ausgebildet sind, und ein Bodenabschnitt, welcher die schüsselförmigen Abschnitte miteinander verbindet, innen ausgebildet ist;
    einem Abstützungsabschnitt (16), der an der Innenseite der schüsselförmigen Abschnitte der Basis angeordnet ist und den bewegbaren Kern drehbar abstützt;
    einer Hauptachse (4), die in dem Mittelabschnitt des stationären Kerns angeordnet ist, der an dem Bodenabschnitt der Basis derart angebracht ist, dass er in Richtung der offenen Seite der schüsselförmigen Abschnitte der Basis vorsteht;
    einer Dreheinheit (5), die durch die Hauptachse drehbar abgestützt ist, eine Schüsselform aufweist, auf einer Seite offen ist und derart angeordnet ist, dass ihr Boden zum Bodenabschnitt der Basis gerichtet ist;
    einer Treibscheibe (6), die an einer Bodenseite der Dreheinheit angeordnet ist;
    einem Feldmagneten (8), der an dem Außenumfang der Bremstrommel angebracht ist, die an der offenen Seite der Dreheinheit angeordnet ist; und
    einer Statorwicklung (9), die an dem Innenumfang der schüsselförmigen Abschnitte der Basis derart angeordnet ist, dass sie zum Feldmagneten gerichtet ist und zusammen mit dem Feldmagneten einen Motor bildet.
  9. Hebevorrichtung mit:
    einer Bremsvorrichtung nach einem der Ansprüche 1 bis 5, bei welcher der bewegbare Kern drehbar in dem stationären Kern abgestützt ist, und welche die Bremsfläche an einem Außenumfang der Bremstrommel aufweist;
    einer Basis (1), bei der in einer Richtung offene, schüsselförmige Abschnitte außen ausgebildet sind, und ein Bodenabschnitt, welcher die schüsselförmigen Abschnitte miteinander verbindet, innen ausgebildet ist;
    einem Bremsenanbringabschnitt (42c), der außerhalb der schüsselförmigen Abschnitte der Basis angeordnet ist und an dem der stationäre Kern angebracht ist;
    einer Hauptachse (4), die in dem Mittelabschnitt des Bodenabschnitts der Basis derart angebracht ist, dass sie in Richtung der offenen Seite der schüsselförmigen Abschnitte der Basis vorsteht;
    einer Dreheinheit (5), die durch die Hauptachse drehbar abgestützt ist, eine Schüsselform aufweist, auf einer Seite offen ist und derart angeordnet ist, dass ihr Boden zum Bodenabschnitt der Basis gerichtet ist;
    einer Treibscheibe (6), die an einer Bodenseite der Dreheinheit angeordnet ist;
    einem Feldmagneten (8), der an dem Außenumfang der Bremstrommel angebracht ist, die an der offenen Seite der Dreheinheit angeordnet ist; und
    einer Statorwicklung (9), die an dem Innenumfang der schüsselförmigen Abschnitte der Basis derart angeordnet ist, dass sie zum Feldmagneten gerichtet ist und zusammen mit dem Feldmagneten einen Motor bildet.
EP07828983.2A 2007-10-02 2007-10-02 Hebevorrichtung für aufzug und bremssystem Not-in-force EP2206674B1 (de)

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EP2206674B1 true EP2206674B1 (de) 2014-09-17

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JP5354013B2 (ja) * 2009-07-07 2013-11-27 三菱電機株式会社 エレベータ巻上機の制動装置
JP5490154B2 (ja) * 2010-02-10 2014-05-14 三菱電機株式会社 エレベータ用巻上機のブレーキ装置
JP5470290B2 (ja) * 2011-01-31 2014-04-16 株式会社日立製作所 エレベーター用巻上機及びエレベーター装置

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JPS426835Y1 (de) * 1960-04-26 1967-03-30
JPH03109627U (de) * 1990-02-23 1991-11-11
JP2000143131A (ja) * 1998-11-06 2000-05-23 Mitsubishi Electric Corp エレベーター用制動装置
WO2003002448A1 (fr) * 2001-06-29 2003-01-09 Mitsubishi Denki Kabushiki Kaisha Systeme de levage d'ascenseur et ascenseur
CN1289381C (zh) * 2002-09-12 2006-12-13 三菱电机株式会社 电梯卷扬机的制动装置
CN100393602C (zh) * 2002-12-04 2008-06-11 三菱电机株式会社 卷扬机的制动机构
WO2005019085A1 (ja) * 2003-08-21 2005-03-03 Mitsubishi Denki Kabushiki Kaisha エレベータ用薄形巻上機
WO2005077807A1 (ja) * 2004-02-16 2005-08-25 Mitsubishi Denki Kabushiki Kaisha エレベータ巻上機用ブレーキ装置

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JPWO2009044450A1 (ja) 2011-01-27
WO2009044450A1 (ja) 2009-04-09
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KR101201027B1 (ko) 2012-11-14
EP2206674A1 (de) 2010-07-14
JP5471445B2 (ja) 2014-04-16
EP2206674A4 (de) 2013-12-11
CN101815666B (zh) 2012-11-21

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