EP4238921B1 - Dispositif de freinage pour un ascenseur ou un système d'escalier mécanique - Google Patents

Dispositif de freinage pour un ascenseur ou un système d'escalier mécanique Download PDF

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Publication number
EP4238921B1
EP4238921B1 EP23382202.2A EP23382202A EP4238921B1 EP 4238921 B1 EP4238921 B1 EP 4238921B1 EP 23382202 A EP23382202 A EP 23382202A EP 4238921 B1 EP4238921 B1 EP 4238921B1
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EP
European Patent Office
Prior art keywords
drive shaft
ratchet wheel
attachment sleeve
sleeve part
escalator
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.)
Active
Application number
EP23382202.2A
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German (de)
English (en)
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EP4238921A1 (fr
Inventor
Aurelio CASAÑO LANTERO
José Ojeda Arenas
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.)
TK Escalator Norte SA
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TK Escalator Norte SA
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Publication of EP4238921A1 publication Critical patent/EP4238921A1/fr
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    • 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
    • B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B25/00—Control of escalators or moving walkways

Definitions

  • the present disclosure generally relates to elevator systems, including at least one elevator car being carried by a tension member and being movable upward and downward in a vertical elevator shaft by an elevator drive.
  • the present disclosure further relates to escalator systems having a number of escalator steps being moveable along an escalator path. More particularly, the present invention is directed to a breaking device for breaking the elevator car or the escalator steps, in particular in an emergency situation.
  • Elevators and escalators for transporting people and goods are an integral part of modern residential and commercial buildings.
  • a typical elevator system includes one or more elevator cars raised and lowered by a hoist system such as an elevator drive.
  • An elevator drive typically includes driven sheave assemblies over which one or more tension members attached to the elevator car are driven.
  • the tension member is connected to a counter weight on an end opposite to the elevator car.
  • the elevator car is raised or lowered due to traction between the tension members and drive sheaves, while the counter weight is lowered or raised accordingly.
  • tension member types including wire rope, V-belts, flat belts, and chains, may be used, with the sheave assemblies having corresponding running surfaces to transmit tractive force between the tension members and the sheave assemblies.
  • the sheave assemblies are therefore part of an elevator drive which has a drive unit driving a drive shaft, wherein the drive shaft carries the sheave or sheaves.
  • a typical escalator system includes a path which is usually formed by a frame and along which elevator steps can move. The steps may therefore be connected to travel rails or at least to each other and be deflected by two shafts at the ends of the path. At least one of the shafts may be a drive shaft or may be connected to a drive shaft.
  • An escalator may have a path running horizontal and vertical or may also run only horizontal to form a moving walk, which may be included within the term escalator.
  • a breaking device for an elevator system is disclosed in US 5,007,505 .
  • two types of breaking devices are common located at the elevator drive.
  • a breaking device for stopping the elevator car during normal operation e.g. at an elevator stop to allow passengers to enter or leave the elevator car is known.
  • auxiliary breaking devices are common, which hold fast the elevator car in one direction in case of an emergency, e.g. a loss of power, while the elevator car can be moved in the other direction for evacuation.
  • breaking devices in particular auxiliary breaking devices, comprise means being connected to the drive shaft and means to engage with these means.
  • a ratchet wheel is connected to the drive shaft and a pawl is configured to engage with the ratchet wheel, holding fast the elevator or escalator in one rotational direction while allowing rotation in the other rotational direction.
  • the ratchet wheel needs to be fixed to the driving shaft in a torsionally rigid manner, which is mostly archived by mounting the ratchet wheel in the axial direction on a corresponding heel of the shaft.
  • a breaking device cannot be added in an existing drives since the drive shaft is neither prepared for receiving a ratchet wheel nor is it sufficiently accessible.
  • KR 101 608 038 B1 and KR 101 833 910 B1 both disclose breaking devices for escalators with ratchet wheels and pawls to stop the escalator in case of an unintended backward rotation.
  • the ratchet wheels are divided into c-shaped halves and are fixed to disk drums which are fixed to drive shafts by radial screws. Disadvantageously, the devices are complicated to install.
  • the object is solved by a braking device for an elevator car of an elevator system or for escalator steps of an escalator system according to claim 1.
  • the ratchet wheel is basically formed as a ring having an inner surface for abutting with an outer surface of the drive shaft and an outer surface with ratchet teeth along the circumferential direction for interaction with the pawl.
  • the first half and the second half each comprise a half of the inner surface and a half of the outer surface, both extending over 180° or close to 180°.
  • the inner surface and/or the outer surface of the halves extend over a little less than 180°, e.g.
  • the inner surface and/or the outer surface of the halves extend over exactly 180°, so that they form a continuous ratchet wheel having the form of a ring, when places on the drive shaft together.
  • the halves are placed on the drive shaft from a radial direction and form the ratchet wheel by being placed adjacent to each other.
  • the halves are configured to align with each other in radial direction or at least having teeth which align with each other in the radial direction to form a closed contour of teeth in the circumferential direction covering 360° or 360° minus the gap of the drive shaft.
  • the halves therefore at least overlap in the axial direction.
  • the halves extend over the same axial part of the drive shaft when being placed on the drive shaft forming the ratchet.
  • the ratchet wheel is fastened to the drive shaft in a torsionally rigid manner by means of clamping force or by form-fit, e.g. on a heel of the drive shaft with a non-circular contour or by means of pins, tongue and groove connection, screws or the like.
  • the pawl preferably is a moveable lever and most preferably spring-loaded, wherein the spring force is directed to an engaged position of the pawl at the ratchet wheel.
  • the ratchet wheel teeth preferably have a first surface on one side being steep, which interacts with a first surface of the pawl and cannot pass the pawl, so that the ratchet wheel is locked in a corresponding first rotational direction.
  • the ratchet wheel teeth preferably further have a less steep second surface which, when moved against the pawl, is able to displace the pawl against the spring-load and ultimately pass the pawl, so that the tension wheel is unlocked in a corresponding second rotational direction.
  • the pawl is preferably configured to be attached to any stationary element around the drive shaft, e.g. a housing, rack or frame, against which it holds the ratchet wheel.
  • the descripted breaking device has the advantage, that it can be mounted in existing drives although the drive shaft is not particularly prepared to receive the ratchet wheel and/or is not accessible, in particular not accessible in the axial direction or along the axial direction. Thus, no preparation or manipulation must be performed on such an drive, e.g. on the drive shaft, to mount the breaking device.
  • the breaking device can therefore be used with many drives either of elevators or escalators, in particular existing drives, no matter of the exact configuration of the drive.
  • the breaking device, in particular the ratchet wheel can also easily be configured to be mounted on a drive shaft with any surface contour, if required, e.g. a round contour or any non-round contour. Furthermore, an interruption of the operation of the elevator system or escalator system during installation of the breaking device is kept short due to the simple installation of the ratchet wheel and causes only little inconvenience.
  • the first half and/or the second half are configured so that by fasten the first half and the second half together the ratchet wheel is clamped on the drive shaft.
  • the means for fasten the first half and the second half together to form the ratchet wheel and the means for fasten the ratchet wheel to the drive shaft in a torsionally rigid manner are the same means.
  • only these means have to be fastened to fasten the ratchet wheel together and to the drive shaft, so that installation of the ratchet wheel is simplified.
  • a satisfactory torsional rigidity is archived by clamping.
  • the clamping force can be adjusted by said means according to the configuration and the materials of the ratchet wheel and the drive shaft.
  • the two halves each enclose the drive shaft by a little less than 180°, so that a gap arises between the halves, when placing them on the drive shaft. By compressing this gap with the fastening means, the halves are clamped on the drive shaft and are fastened together.
  • the means for fasten the first half and the second half together and/or the means for fasten the ratchet wheel to the drive shaft are formed by screws.
  • the halves each comprise recesses for such screws.
  • screws allow a precise adjustment of the force over a wide range.
  • screws are simple to fasten, so that the installation of the breaking device is simple.
  • at least two screws are used to fasten the halves together and/or to the drive shaft, so that symmetry is given. More preferred, more than two screws are used. Most preferred a straight number of screws is used, e.g. 4, 6, 8, 10, 12, 14 or 16 screws.
  • the screws may be used with screw nuts or interact with threads in at least one of the halves.
  • the first half is connected to an attachment sleeve having a first attachment sleeve part and a second attachment sleeve part, each of which is configured to half-enclose the drive shaft, wherein the attachment sleeve serves as means for fasten the ratchet wheel to the drive shaft in a torsionally rigid manner, and wherein the first attachment sleeve part and the second attachment sleeve part are connected to each other by a hinge.
  • the first half can be fastened to the drive shaft by means of the attachment sleeve.
  • the first half might therefore be connected to the hinge, e.g. by form-fit.
  • the attachment sleeve is configured to be clamped on the drive shaft, e.g. in a comparable manner like described before.
  • the attachment sleeve parts each enclose the drive shaft by a little less than 180°, so that a gap arises between the attachment sleeve parts, when placing them on the drive shaft, wherein said gap is compressed for generating a clamping force.
  • the gap can exemplarily be compressed by the means of screws and screw nuts.
  • the attachment sleeve can be of a configuration suitable to sufficiently fasten the first half to the drive shaft, e.g. the attachment sleeve is of a material having a favorable friction coefficient with the drive shaft and/or can be of a favorable form.
  • the attachment sleeve extends in the axial direction on both sides of the first half and even more preferred has a significant longer extension in the axial direction than the first half.
  • the attachment sleeve can be opened by swivel at least one attachment sleeve part around the hinge to receive the drive shaft in the attachment sleeve and closed for fastening of the attachment sleeve to the drive shaft.
  • the attachment sleeve parts cannot loose each other in the open state, e.g. before installation on the drive shaft.
  • at least one attachment sleeve part has a recess configured to pass along the first half, when the attachment sleeve is opened.
  • the recess can also be configured to receive the second half after fastening the attachment sleeve to the drive shaft.
  • the second half is preferably configured to be fastened to the first half, e.g. by screws or the like.
  • the second half can also be configured to be fastened to the attachment sleeve, in particular after fastening the attachment sleeve to the drive shaft.
  • the pawl is configured to engage with the ratchet wheel only in emergency situations.
  • the breaking device allows a rotation of the drive shaft in both directions during normal operation.
  • the breaking device does not at all take any influence on the drive during normal operation.
  • the breaking device locks the elevator car or the escalator steps in a direction corresponding to the first rotational direction while the elevator car or escalator steps can be safely moved in the opposite direction, e.g. for evacuation.
  • the breaking device is an auxiliary breaking device.
  • auxiliary breaking devices installation in an existing drive is of interest, since a need may exist to add or replace such an auxiliary breaking device, when it is not yet included in the drive or when an existing auxiliary breaking device needs to be replaced at least partially, e.g. to conform to new standards.
  • the breaking device comprises at least one friction sleeve which is configured to be placed between inner surfaces of the first half and/or the second half and the drive shaft and/or between inner surfaces of the first attachment sleeve part and/or the second attachment sleeve part and the drive shaft, and wherein the friction sleeve is configured to increase friction between the ratchet wheel and the drive shaft.
  • the friction sleeve is made from a material having a high friction coefficient with the material of the ratchet wheel, the material of the attachment sleeve and/or the material of the drive shaft.
  • the friction sleeve has a friction coefficient of more than 0,15, preferred more than 0,2 or even more preferred more than 0,25 with the material of the ratchet wheel, the material of the attachment sleeve and/or the material of the drive shaft.
  • the friction sleeve can be configured to be placed on the drive shaft separately from the ratchet wheel before placing the ratchet wheel on the drive shaft or can be attached to the ratchet wheel or the attachment sleeve in particular.
  • the friction sleeve is configured to enclose the drive shaft by 270 up to 360°, wherein the friction sleeve is deformable for placement on the drive shaft. The friction sleeve is then placed on the drive shaft prior to the placement of the ratchet wheel.
  • the friction sleeve is wrapped around the drive shaft while being from a soft material, e.g. a textile or the like.
  • the friction sleeve comprises a first friction sleeve part and a second friction sleeve part, each of which is configured to enclose the drive shaft by 90 up to 180°.
  • the two friction sleeve parts can be placed on the drive shaft from a radial direction in the same manner as the ratchet wheel halves and the friction sleeve is easy to assemble.
  • the friction sleeve is then enclosed by the ratchet wheel and/or the attachment sleeve and thus fixed in place on the drive shaft.
  • the first friction sleeve part and the second friction sleeve part are each of a rigid form, which favors a simple and convenient assembly of the friction sleeve and the breaking device.
  • the first friction sleeve part is assigned to the first half and/or the first attachment sleeve part and the second friction sleeve part is assigned to the second half and/or the second attachment sleeve part.
  • the first friction sleeve part is fixed to or hold by the first half and/or the first attachment sleeve part and the second friction sleeve part is fixed to or hold by the second half and/or the second attachment sleeve part.
  • the friction sleeve parts cannot be lost from the ratchet wheel and/or the attachment sleeve before installation and a small number of independent parts has to be assembled.
  • the friction sleeve parts can be fixed at the sleeve parts exemplarily by glue or the like or be hold by form-fit.
  • the ratchet wheel can be configured according to any of the embodiments or configurations described beforehand and archives the same advantages like the described breaking device accordingly.
  • the object is further solved by a method for assembling a predescribed ratchet wheel on a drive shaft of an elevator system or escalator system according to claim 10.
  • the attachment sleeve is opened by swivel at least one attachment sleeve part against the other attachment sleeve part.
  • the first ratchet wheel half might be passed by the according attachment sleeve part utilizing a recess in the attachment sleeve part.
  • the second ratchet wheel half might also utilize said recess for being placed adjacent to the first half after fastening the attachment sleeve on the drive shaft.
  • the ratchet wheel and the attachment sleeve are placed on the drive shaft from a radial direction and therefore do not reliant on axial accessibility of the drive shaft. With this method, the advantages described according to the respective embodiments of the ratchet wheel can be achieved accordingly.
  • an elevator drive for moving an elevator car along a vertical elevator shaft with a tension member, comprising at least one drive unit, at least one drive shaft for transmitting a drive torque from the drive unit to the tension member, at least one sheave for receiving the tension member, wherein the sheave is connected to the drive shaft in a torsionally rigid manner, and at least one predescribed breaking device, wherein the ratchet wheel is mounted on the drive shaft.
  • the drive unit is an electric motor/generator.
  • the elevator drive comprises a first predescribed breaking device for breaking the elevator car in a first rotational direction and a second predescribed breaking device for breaking the elevator car in a second rotational direction adjacent to the first rotational direction.
  • an elevator system comprising a vertical elevator shaft, at least one elevator car being moveable upward and downward in the elevator shaft, at least one tension member connected to the elevator car, and a predescribed elevator drive receiving the tension member on the sheave.
  • an escalator drive for moving escalator steps along an escalator path, comprising at least one drive unit, at least one drive shaft for transmitting a drive torque from the drive unit to the escalator steps, and at least one predescribed breaking device, wherein the ratchet wheel is mounted on the drive shaft.
  • the drive unit is an electric motor/generator.
  • an escalator system comprising an escalator path, a number of escalator steps being moveable along the escalator path, and an predescribed escalator drive.
  • FIG. 1 shows an embodiment of a breaking device 100.
  • the breaking device 100 comprises a ratchet wheel 1, which is mounted on a drive shaft 2 of an elevator or escalator drive not shown in further detail.
  • the ratchet wheel 1 comprises a first half 1.1 and a second half 1.2, each half-enclosing the drive shaft 2 and together forming the ratchet wheel 1.
  • the ratchet wheel 1, respectively the first half 1.1 and the second half 1.2, has an inner surface 1.3 abutting on the drive shaft 2 and an outer surface 1.4 having several ratchet teeth 3 evenly distributed around the circumference of the ratchet wheel 1.
  • the ratchet teeth 3 each have a steep first surface 3.1 and a less steep second surface 3.2 for interaction with a pawl 4.
  • the pawl 4 is pivotable around a pawl shaft 6 and in an engaged position according to fig. 1 is pressed against the ratchet wheel 1 counterclockwise around the pawl shaft 6 by a spring mechanism 7, so that the pawl 4 is spring-loaded.
  • a spring mechanism 7 so that the pawl 4 is spring-loaded.
  • the ratchet wheel 1 can then rotate freely in both rotational directions 5.1, 5.2 and is generally unlocked.
  • the breaking device 100 comprises a actuator 8 such as an electric or hydraulic drive, to switch the spring mechanism 7 between the engaged position of the breaking device 100 and the unengaged position of the breaking device 100.
  • the first half 1.1 and the second half 1.2 are placed on the drive shaft 2 adjacent to each other, thus in radial alignment, wherein both half-enclose the drive shaft 2, as shown in figure 1a and 1b in closer detail.
  • Figure 1b shows the ratchet wheel of the breaking device 100 in a perspective view.
  • the term half-enclosing is to be understood in a way that both halves 1.1, 1.2 enclose the drive shaft by a little less than 180° in the shown embodiment. Accordingly, a gap 9 results between the halves 1.1, 1.2, which is utilized to generate a clamping force for fastening the ratchet wheel 1 to the round drive shaft 2 in a torsionally rigid manner.
  • Both halves 1.1, 1.2 comprise recesses to receive a number of screws 10, which engage with screw nuts 11 to generate the clamping force and thereby fasten the ratchet wheel 1 to the drive shaft 2.
  • the recesses to receive the screws 10 are placed on protrusions 13.
  • the ratchet wheel 1 comprises ratchet teeth 3 over a first axial area 14.1, while it also extends over a second axial area 14.2 on a first side of the ratchet teeth 3 and over a third axial area 14.3 on a second side of the ratchet teeth 3.
  • the second axial area 14.2 and the third axial area 14.3 are provided to increase the contact area between the ratchet wheel 1 and the drive shaft 2 in the axial direction to generate a sufficient amount of clamping force to safely hold fast the drive shaft 2 in the first rotational direction 5.2, when the breaking device 100 is locked.
  • FIGS 2a, 2b and 2c show a ratchet wheel 1 of a second preferred embodiment of a breaking device, wherein the further parts of the breaking device may be configured in the same way shown in figures 1a and 1b .
  • the ratchet wheel 1 comprises a first half 1.1 and a second half 1.2, together forming the ratchet wheel 1 with an inner surface 1.3 and an outer surface 1.4.
  • the first half 1.1 is connected to an attachment sleeve 15, having a first attachment sleeve part 15.1 and a second attachment sleeve part 15.2, wherein the first attachment sleeve part 15.1 and the second attachment sleeve part 15.2 are connected to each other by a hinge 16.
  • first half 1.1 is connected to the hinge 16 as shown in detail in figure 2c , which is a cross section through the hinge 16.
  • first attachment sleeve part 15.1, the second attachment sleeve part 5.2 and the first half 1.1 enclose the hinge 16 in a form-fit manner and thus interlock with the hinge 16.
  • the first half 1.1 and the second half 1.2 can both swivel against the first half 1.1 to bring the attachment sleeve 15 to an open position as shown in figure 2a .
  • the first attachment sleeve part 15.1 comprises a first recess 17.1
  • the second attachment sleeve part 15.2 comprises a second recess 17.2, which allow the attachment sleeve parts 15.1, 15.2 to pass along the first half 1.1, when swivel to the open position.
  • the attachment sleeve 15 can receive the drive shaft 2 along a receiving direction R, which is parallel to the direction, in which the first half 1.1. is to be placed on the drive shaft 2.
  • the attachment sleeve parts 15.1, 15.2 are swiveled against the first half 1.1 to a closed position shown in figure 2b and are fastened to each other by screws 10 with screw nuts 11.
  • the screws 10 and screw nuts 11 are located at protrusions 13.
  • the attachment sleeve 15 forms a gap 9, so that by fastening the screws 10, a clamping force arises which results in fastening of the attachment sleeve 15 on the drive shaft 2 in a torsionally rigid manner.
  • the second half 1.2 is connected to the first half 1.1.
  • the first half 1.1 and the second half 1.2 both have recesses 18 to receive connection plates 19, which are fastened to the respective halves 1.1, 1.2 by screws 20.
  • the recesses 17.1, 17.2 in the attachment sleeve parts 15.1, 15.2 are formed to receive the second half 1.2 for connection with the first half 1.1.
  • the second half 1.2 is connected to the first half 1.1 in a torsionally rigid manner.
  • the second half 1.2 might alternatively, but not shown in the figures, be fastened to the attachment sleeve 15.
  • the ratchet wheel 1 of figures 2a, 2b and 2c further comprises a friction sleeve 12, which has a first friction sleeve part 12.1 assigned to the first attachment sleeve part 15.1 and a second friction sleeve part 12.2 assigned to the second attachment sleeve part 15.2.
  • the friction sleeve parts 12.1, 12.2 are hold on the attachment sleeve parts 15.1, 15.2 by form-fit at least in the radial and circumferential directions.
  • the friction sleeve parts 12.1, 12.2 can additionally be fixed to the attachment sleeve parts 15.1, 15.2 materially by glue or the like.
  • Figures 3a and 3b show a ratchet wheel 1 of a third preferred embodiment of a breaking device, which is on a par with the second embodiment in numberous aspects.
  • the first half 1.1 is connected to an attachment sleeve 15, having a first attachment sleeve part 15.1 and a second attachment sleeve part 15.2, wherein the first attachment sleeve part 15.1 and the second attachment sleeve part 15.2 are connected to each other by a hinge 16.
  • the attachment sleeve 15 extends to a first axial direction A. 1 of the ratchet wheel 1 only.
  • the second half 1.2 of the ratchet wheel 1 is connected to an attachment sleeve 15', having a first attachment sleeve part 15.1' and a second attachment sleeve part 15.2', wherein the first attachment sleeve part 15.1' and the second attachment sleeve part 15.2' are connected to each other by a hinge 16'.
  • the attachment sleeve 15' extends to a second axial direction A.2 of the ratchet wheel 1 contrary to the first axial direction A. 1.
  • FIG 4 shows a schematic and simplified view of an elevator system 200 comprising a vertical elevator shaft 30, in which an elevator car 31 is moveable upwards and downwards. Above the shaft 30, an engine room 32 is located.
  • the elevator car 31 is carried by a tension member 33 such as a rope, which extends into the engine room 32.
  • an elevator drive 34 is located, having a drive unit 35 such as an electric motor/generator, driving a drive shaft 2.
  • the drive unit 35 might further comprise a breaking device not shown in figure 4 for breaking the elevator car 31 during normal operation of the elevator system 200.
  • the drive shaft 2 is mounted in a bearing 36 on its end adjacent to the drive unit 35.
  • a driven sheave 37 On the drive shaft 2, a driven sheave 37 is mounted, which receives the tension member 33 and drives the tension member 33 due to traction between the sheave 37 and the tension member 33.
  • the tension member 33 is connected to a counter weight not shown in the figures on its end adjacent to the elevator car 31. Further, a ratchet wheel 1 of a breaking device 100 is mounted on the drive shaft 2 without the breaking unit 100 being shown in further detail.
  • Figure 5 shows a schematic and simplified view of an escalator system 300 comprising travel rails 40, which form a path 41, along which steps 42 are pulled. Only a small number of steps 42 is shown in figure 5 , yet steps 42 are attached to the travel rails 40 all along the path 41.
  • the travel rails 40 are deflected on an upper end 43 by a shaft 44, wherein the travel rails 40 engage with gears 45, which are attached to the shaft 44.
  • the travel rails 40 are further also deflected on an lower end 43 by a drive shaft 2, wherein the travel rails 40 engage with gears 46, which are attached to the drive shaft 2.
  • the drive shaft 2 forms an escalator drive 47 together with a drive unit not shown.
  • a ratchet wheel 1 of a breaking device 100 is mounted on the drive shaft 2 without the breaking unit 100 being shown in further detail.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Escalators And Moving Walkways (AREA)

Claims (14)

  1. Dispositif de freinage (100) pour une cabine d'ascenseur (31) d'un système d'ascenseur (200) ou pour des marches d'escalator (42) d'un système d'escalator (300), le dispositif de freinage (100) comprenant
    une roue à rochet (1) pouvant être montée sur un arbre d'entraînement (2) du système d'ascenseur (200) ou du système d'escalator (300) ;
    un cliquet (4) conçu pour venir en prise avec la roue à rochet (1) afin de faire fonctionner le dispositif de freinage (100), de telle sorte que la roue à rochet (1) est verrouillée dans une première direction de rotation (5.1) et déverrouillée dans une seconde direction de rotation (5.2) ;
    dans lequel la roue à rochet (1) comprend une première moitié (1.1) et une seconde moitié (1.2), chacune étant conçue pour enfermer à moitié l'arbre d'entraînement (2) ;
    dans lequel la première moitié (1.1) et/ou la seconde moitié (1.2) comprennent des moyens de fixation de la première moitié (1.1) et de la seconde moitié (1.2) conjointement pour former la roue à rochet (1) et des moyens de fixation de la roue à rochet (1) à l'arbre d'entraînement (2) d'une manière rigide en torsion ;
    caractérisé en ce que
    la première moitié (1.1) et/ou la seconde moitié (1.2) sont conçues de telle sorte que par la fixation de la première moitié (1.1) et de la seconde moitié (1.2) conjointement, la roue à rochet (1) est fixée par serrage sur l'arbre d'entraînement (2).
  2. Dispositif de freinage (100) selon la revendication 1,
    dans lequel les moyens de fixation de la première moitié (1.1) et de la seconde moitié (1.2) conjointement et/ou les moyens de fixation de la roue à rochet (1) à l'arbre d'entraînement (2) sont formés par des vis (10, 20).
  3. Dispositif de freinage (100) selon la revendication 1 ou 2,
    dans lequel la première moitié (1.1) est reliée à un manchon de fixation (15, 15') ayant une première pièce de manchon de fixation (15.1, 15.1') et une seconde pièce de manchon de fixation (15.2, 15.2'), chacune étant conçue pour enfermer à moitié l'arbre d'entraînement (2) ;
    dans lequel le manchon de fixation (15, 15') sert de moyen de fixation de la roue à rochet (1) à l'arbre d'entraînement (2) d'une manière rigide en torsion ; et
    dans lequel la première pièce de manchon de fixation (15.1, 15.1') et la seconde pièce de manchon de fixation (15.2, 15.2') sont reliées l'une à l'autre par une charnière (16, 16').
  4. Dispositif de freinage (100) selon l'une quelconque des revendications précédentes,
    dans lequel le cliquet (4) est conçu pour venir en prise avec la roue à rochet (1) uniquement dans les situations d'urgence.
  5. Dispositif de freinage (100) selon l'une quelconque des revendications précédentes,
    comprenant au moins un manchon de frottement (12) qui est conçu pour être placé entre les surfaces internes (1.3) de la première moitié (1.1) et/ou de la seconde moitié (1.2) et l'arbre d'entraînement (2) et/ou entre les surfaces internes de la première pièce de manchon de fixation (15.1, 15.1') et/ou de la seconde pièce de manchon de fixation (15.2, 15.2') et l'arbre d'entraînement (2) ; et
    dans lequel le manchon de frottement (12) est conçu pour augmenter les frottements entre la roue à rochet (1) et l'arbre d'entraînement (2).
  6. Dispositif de freinage (100) selon la revendication 5,
    dans lequel le manchon de frottement (12) est conçu pour enfermer l'arbre d'entraînement (2) de 270° jusqu'à 360° et dans lequel le manchon de frottement (12) est déformable pour le placement sur l'arbre d'entraînement (2).
  7. Dispositif de freinage (100) selon la revendication 5,
    dans lequel le manchon de frottement (12) comprend une première pièce de manchon de frottement (12.1) et une seconde pièce de manchon de frottement (12.2), chacune étant conçue pour enfermer l'arbre d'entraînement (2) de 90 jusqu'à 180°.
  8. Dispositif de freinage (100) selon la revendication 7,
    dans lequel la première pièce de manchon de frottement (12.1) est assignée à la première moitié (1.1) et/ou la première pièce de manchon de fixation (15.1, 15.1') et la seconde pièce de manchon de frottement (12.1) est assignée à la seconde moitié (1.2) et/ou la seconde pièce de manchon de fixation (15.2, 15.2').
  9. Roue à rochet (1) pour un dispositif de freinage (100) selon une revendication précédente,
    dans laquelle la roue à rochet (1) comprend une première moitié (1.1) et une seconde moitié (1.2), chacune étant conçue pour enfermer à moitié un arbre d'entraînement (2) d'un système d'ascenseur (200) ou d'un système d'escalator (300) ; et
    dans laquelle la première moitié (1.1) et/ou la seconde moitié (1.2) comprennent des moyens de fixation de la première moitié (1.1) et de la seconde moitié (1.2) conjointement pour former la roue à rochet (1) et des moyens de fixation de la roue à rochet (1) à l'arbre d'entraînement (2) d'une manière rigide en torsion ;
    caractérisée en ce que la première moitié (1.1) et/ou la seconde moitié (1.2) sont conçues de telle sorte que par la fixation de la première moitié (1.1) et de la seconde moitié (1.2) conjointement, la roue à rochet (1) est fixée par serrage sur l'arbre d'entraînement (2).
  10. Procédé d'assemblage d'une roue à rochet (1) selon la revendication 9 sur un arbre d'entraînement (2) d'un système d'ascenseur (200) ou d'un système d'escalator (300),
    dans lequel la première moitié (1.1) est reliée à un manchon de fixation (15, 15') ayant une première pièce de manchon de fixation (15.1, 15.1') et une seconde pièce de manchon de fixation (15.2, 15.2'), chacune étant conçue pour enfermer à moitié l'arbre d'entraînement (2) ;
    dans lequel le manchon de fixation (15, 15') sert de moyen de fixation de la roue à rochet (1) à l'arbre d'entraînement (2) d'une manière rigide en torsion ;
    caractérisé en ce que
    la première pièce de manchon de fixation (15.1, 15.1') et la seconde pièce de manchon de fixation (15.2, 15.2') sont reliées l'une à l'autre par une charnière (16, 16') ;
    dans lequel dans une première étape la première moitié (1.1) est placée sur l'arbre d'entraînement (2) et fixée à lui au moyen du manchon de fixation (15, 15') en utilisant la charnière (16, 16') ; et
    dans lequel dans une seconde étape la seconde moitié (1.2) est fixée à la première moitié (1.2) ou au manchon de fixation (15, 15').
  11. Moteur d'ascenseur (34) pour le déplacement d'une cabine d'ascenseur (31) le long d'une cage d'ascenseur verticale (30) avec un élément de tension (33), comprenant
    au moins une unité d'entraînement (35) ;
    au moins un arbre d'entraînement (2) pour la transmission d'un couple d'entraînement depuis l'unité d'entraînement (35) à l'élément de tension (33) ;
    au moins une poulie (37) pour la réception de l'élément de tension (33), dans lequel la poulie (37) est reliée à l'arbre d'entraînement (2) d'une manière rigide en torsion ; et
    au moins un dispositif de freinage (100) selon l'une des revendications 1 à 8, dans lequel la roue à rochet (1) est montée sur l'arbre d'entraînement (2).
  12. Système d'ascenseur (200) comprenant
    une cage d'ascenseur verticale (30) ;
    au moins une cabine d'ascenseur (31) déplaçable vers le haut et vers le bas dans la cage d'ascenseur (30) ;
    au moins un élément de tension (33) relié à la cabine d'ascenseur (31) ; et
    un moteur d'ascenseur (34) selon la revendication 11 recevant l'élément de tension (33) sur la poulie (37).
  13. Moteur d'escalator (47) pour le déplacement de marches d'escalator (42) le long d'un trajet d'escalator (41), comprenant
    au moins une unité d'entraînement ;
    au moins un arbre d'entraînement (2) pour la transmission d'un couple d'entraînement depuis l'unité d'entraînement vers les marches d'escalator (42) ; et
    au moins un dispositif de freinage (100) selon l'une des revendications 1 à 8, dans lequel la roue à rochet (1) est montée sur l'arbre d'entraînement (2).
  14. Système d'escalator (300) comprenant
    un trajet d'escalator (41) ;
    un certain nombre de marches d'escalator (42) déplaçables le long du trajet d'escalator (41) ; et
    un moteur d'escalator (47) selon la revendication 13.
EP23382202.2A 2022-03-03 2023-03-03 Dispositif de freinage pour un ascenseur ou un système d'escalier mécanique Active EP4238921B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22382196 2022-03-03

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EP4238921B1 true EP4238921B1 (fr) 2024-02-28

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FI (1) FI4238921T3 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3071502B1 (fr) * 2013-11-18 2019-07-03 Otis Elevator Company Frein destiné à être utilisé dans système de transport de personnes

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5007505A (en) 1990-03-19 1991-04-16 Northern Elevator Limited Elevator traction sheave brake
KR101608038B1 (ko) 2015-08-27 2016-03-31 (주)신한엘리베이터 호환성·탈부착결합성이 우수한 에스컬레이터 역회전 방지용 스마트 보조브레이크장치
CN106976817A (zh) * 2017-05-24 2017-07-25 苏州汉森电梯有限公司 自动扶梯的梯级链轮轴附加制动装置
KR101833910B1 (ko) 2017-06-01 2018-03-02 (주)신한엘리베이터 높이 6m 이상의 중·대형 에스컬레이터용 역회전 방지 스마트 트윈 SE형 보조브레이크장치

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3071502B1 (fr) * 2013-11-18 2019-07-03 Otis Elevator Company Frein destiné à être utilisé dans système de transport de personnes

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EP4238921A1 (fr) 2023-09-06

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