CN105565122A - Stabilization mechanism of elevator car - Google Patents
Stabilization mechanism of elevator car Download PDFInfo
- Publication number
- CN105565122A CN105565122A CN201610158583.XA CN201610158583A CN105565122A CN 105565122 A CN105565122 A CN 105565122A CN 201610158583 A CN201610158583 A CN 201610158583A CN 105565122 A CN105565122 A CN 105565122A
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- China
- Prior art keywords
- close proximity
- electromagnetic iron
- proximity electromagnetic
- carrier
- guide rail
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- 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.)
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Classifications
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- 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
- B66B11/02—Cages, i.e. cars
- B66B11/026—Attenuation system for shocks, vibrations, imbalance, e.g. passengers on the same side
- B66B11/028—Active systems
- B66B11/0286—Active systems acting between car and supporting frame
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- 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
- B66B11/02—Cages, i.e. cars
- B66B11/026—Attenuation system for shocks, vibrations, imbalance, e.g. passengers on the same side
- B66B11/0293—Suspension locking or inhibiting means to avoid movement when car is stopped at a floor
Abstract
The invention discloses a stabilization mechanism of an elevator car. The stabilization mechanism comprises a base, a bearing frame, a short range electromagnet, a push electromagnet and a damper, wherein the base is used for relatively fixing the elevator car and is fixed with a vertical guide device; the bearing frame is matched with the vertical guide device in a sliding mode; the short range electromagnet is arranged on the bearing frame in a sliding mode; the push electromagnet is used for driving the short range electromagnet to slide to a guide rail; and one end of the damper is connected with the bearing frame, and the other end of the damper is connected with the base. According to the stabilization mechanism, the damper is adopted for weakening the vertical shaking caused by rapid change of loads of the elevator car, and the damper of the stabilization mechanism does not supply resistance, so that although the short range electromagnet is released so as not to be attracted to the guide rail through magnetic force, the elevator car can not be obviously impacted.
Description
Technical field
The present invention relates to elevator technology and manufacture field, be specifically related to a kind of car stabilizing mechanism.
Background technology
Generally using of elevator brings convenience to the life of people, and meanwhile, the comfort property of elevator also receives publicity day by day.
At present along with building hoisting depth constantly improves, the elevator of large hoisting depth also more and more applies to market.Rely on traction medium during lift car, hang in hoistway, when hoisting depth is large, the elasticity of traction medium increases, and car there will be the sinking of short time and rocks when load/unload passenger.This brings bad boarding to passenger and experiences.For alleviating this problem, elevator manufacturer often increases traction medium to improve system rigidity, but significantly cost can be brought to increase.
Therefore simple in the urgent need to a kind of structure, lower-cost stabilizing mechanism.
Summary of the invention
The present invention is directed to the problems referred to above, propose a kind of stabilizing mechanism of lift car.Solve prior art and improve system rigidity by increasing traction medium, institute causes the problem of significantly cost increase.
The technical scheme that the present invention takes is as follows:
The stabilizing mechanism of the first lift car disclosed by the invention, the stabilizing mechanism of this lift car is for being arranged on elevator cab, and coordinate with the guide rail of elevator, stabilizing mechanism comprises:
Pedestal, for relative with elevator cab fixing, pedestal is fixed with vertical guide piece;
Carrier, with described vertical guide piece bearing fit;
Close proximity electromagnetic iron, is slidably mounted on described carrier;
Promoting electromagnet, sliding to guide rail for driving close proximity electromagnetic iron;
Damper, one end is connected with described carrier, and the other end is connected with described pedestal.
Stabilizing mechanism improves for system rigidity relative to increase traction medium, can be greatly cost-saving.
Except improving system rigidity to carry out except increasing surely by increasing traction medium, having and carrying out stable mechanism by magnetic force in prior art, its principle is after lift car is stopped, before door is opened, by electromagnetic attraction, between guide rail and mechanism, produce friction force, stop lift car to rock; After elevator cab door is closed, before lift car reruns, cancel electromagnetic attraction, eliminate friction force, allow elevator normally run.Prior art is clamped by a pair gear mesh guide rail of driven by motor in addition.The common feature of above two kinds of methods is, mechanism provides a constant friction drag, teetertotters stop lift car.Its defect is, when constant friction force is too small, stablizing effect is not obvious, and passenger still can feel the strong sinking of car; When friction force is excessive, before lift car starts, friction force can be cancelled, and the lift car losing friction force rocks again, to reach new state of equilibrium.Secondly, in the life cycle of elevator, friction material can experience the friction repeatedly of up to a million times, and for ensureing its life-span and stability, type selecting is very difficult; Or adopt conventional friction material, but need periodic replacement.
The application adopts damper to slow down the vertical wobble produced when elevator lift car load changes rapidly, when stabilizing mechanism uses, close proximity electromagnetic iron and guide rail is driven to fit by promoting electromagnet, close proximity electromagnetic iron and guide rail pass through magnetic attraction, during stabilizing mechanism work, its friction drag does not derive from the relative sliding between close proximity electromagnetic iron and guide rail, but the hydraulic pressure of damper or air pressure resistance, during the obvious relative motion of the speed that produces between lift car and guide rail, carrier and pedestal relative motion, close proximity electromagnetic iron is motionless, damper moves, damper can provide larger antagonistic force simultaneously, lift car is impelled to calm down fast, and when car and guide rail geo-stationary, damper does not provide resistance, even if so close proximity electromagnetic iron release not with guide rail magnetic attraction, also can not produce lift car and obviously impact.
During practice, damper can adopt, but the damper being not limited to following kind comes:
1) two way damper, reduces rocking car rise and fall;
2) speed sensitivity damper, when speed of relative movement is large, provides significant dumping force, at speed of relative movement hour, provides faint dumping force;
3) adjustable damper, because temperature can form impact to the speed of damper-drag relationship, can select adjustable damper, be convenient to building site and adjust according to present case.
Carrier be fixed on vertical guide piece bearing fit on pedestal, take pedestal as object of reference, except can prolonging shaft depth direction (y direction) translation, other degree of freedom of carrier is all limited.During practice, vertical guide piece can adopt, but is not limited to come with under type:
1) translation line slideway,
2) the cross section circle of vertically arranging for a pair is plain bearing, and axial motion can be prolonged in its outer ring,
3) a non-circular plain bearing in cross section vertically arranged, axial motion can be prolonged in its outer ring, but cannot prolong axial rotation,
The second protection that carrier and pedestal should be provided with slip-off preventing during practice designs, even if when vertical guide piece is destroyed, carrier can not depart from pedestal.
The promotion electromagnet of the application can adopt normal traction formula electromagnet, also can adoption rate electromagnet, and the former electromagnetic force obviously increases with stroke, close proximity electromagnetic iron can be caused to impact guide rail, and produce noise, the size of the power output of the latter is comparatively stable, obviously can reduce impact, reduce noise.
When adopting common close proximity electromagnetic iron, sequence of operation has following three kinds of schemes,
1) close proximity electromagnetic iron and promotion electromagnet are energized simultaneously, and close proximity electromagnetic iron is pressed close to and adsorbed guide rail, and close proximity electromagnetic iron and dead electricity while of promoting electromagnet, depart from.Feature is as follows: control simple; Two electromagnet simultaneously electric time, increase impact during absorption, so noise is larger; Promote electromagnet and be in long-time state that must be electric, it is overheated easily to occur.
2) close proximity electromagnetic iron and promotion electromagnet are energized simultaneously, and close proximity electromagnetic iron is pressed close to and adsorbed guide rail, and only close proximity electromagnetic Tie Tong electricity maintains absorption, close proximity electromagnetic iron dead electricity, departs from.Feature is as follows: solve and promote the overheated problem of electromagnet.
3) promoting electromagnet obtains electric, and close proximity electromagnetic iron is near guide rail, and close proximity electromagnetic iron obtains electric absorption, promotes electromagnet dead electricity, close proximity electromagnetic iron dead electricity, departs from.Feature is as follows: solve absorption noise and promote the overheated problem of electromagnet, logic control slightly complicated.
When selecting dead electricity type close proximity electromagnetic iron and two-way close proximity electromagnetic iron, more than logical AND similar.Difference is the acting characteristic of electromagnet self.
Except common close proximity electromagnetic iron, also dead electricity type close proximity electromagnetic iron can be adopted to substitute, its advantage is: provide the adsorption affinity between guide rail by permanent magnet, and when needs discharge, only need its energising, cancelling out each other in the magnetic field of electromagnet and the magnetic field of permanent magnet, thus realizes eliminating adsorption affinity.And under not service condition, have enough gaps between close proximity electromagnetic iron and guide rail, ensure the confining force of the adsorption affinity of permanent magnet much smaller than horizontal retracing spring.
Also reversible close proximity electromagnetic iron can be selected, when dead electricity, electromagnet is provided by permanent magnet the adsorption affinity pressing close to object, when forward obtains electric, permanent magnet superposes in the same way with electromagnetic force, provides larger adsorption affinity, reverse electric time, permanent magnet and electromagnetic force are oppositely offset, and externally then do not have adsorption affinity.Select reversible close proximity electromagnetic iron, larger adsorption affinity can be obtained with small area analysis, when discharging, only need repercussion to be energized, can adsorption affinity be eliminated.
Suitable friction force is produced between close proximity electromagnetic iron and guide rail, the rock of car under common Loading conditions can be tackled on the one hand, be subject to damage at car, when sharply sinking in short-term on the other hand, dumping force exceedes maximum static friction force, and produces slippage between close proximity electromagnetic iron and guide rail.To protect damper.
During practice, the state of feedback stability mechanism can be carried out by arranging respective element, if occur that unit state is abnormal, reminding fault or break-off by suitable strategy.Scheme is including but not limited to under type:
1) at carrier, one stroke switch can be set between close proximity electromagnetic iron;
2) magnetic field induction element is set in close proximity electromagnetic iron, identifies whether close proximity electromagnetic iron is adsorbed on guide rail by the change of magnetic-field intensity;
3) pair of contact, gives prominence on the adsorption plane of close proximity electromagnetic iron, when close proximity electromagnetic iron absorption guide rail, by the metal surface short circuit of guide rail.
Because whether stabilizing mechanism is triggered not easily by direct detection, in order to elevator debugging convenience, one or more status indicator lamps can be set the conspicuous position outside stabilizing mechanism.Represent whether on off mode and the stabilizing mechanism of close proximity electromagnetic iron effectively work.
Optionally, carrier is also provided with horizontal orientation device, and described close proximity electromagnetic iron coordinates with horizontal orientation device.
Horizontal orientation device can make close proximity electromagnetic iron on carrier, prolong x direction to move (x direction is vertical with y direction), and in order to realize guide function, horizontal orientation device can adopt and singly be not limited to following four kinds of modes:
1) guide pillar of the round section of a pair lateral arrangement and guide pin bushing combine, and wherein, guide pillar is relative with close proximity electromagnetic iron fixing, and guide pin bushing is relative with carrier fixing, or guide pillar is relative with carrier fixing, and guide pin bushing is relative with close proximity electromagnetic iron fixing;
2) guide pillar of the noncircular cross section of at least one lateral arrangement and guide pin bushing combine, and guide pillar is relative with close proximity electromagnetic iron fixing, and guide pin bushing is relative with carrier fixing, or guide pillar is relative with carrier fixing, and guide pin bushing is relative with close proximity electromagnetic iron fixing;
3) two flangings on carrier are for limiting the degree of freedom of close proximity electromagnetic iron in y direction, the two ends up and down of close proximity electromagnetic iron are furnished with two limit shafts, limit shaft is relative with carrier fixing, and limit shaft is for limiting the degree of freedom (x direction, y direction and z direction between two mutually vertical) of close proximity electromagnetic iron in z direction.During practical operation, can be cliding friction between limit shaft and close proximity electromagnetic iron, also can install bearing at limit shaft, friction force when reducing mobile.
4) two flangings on carrier, for limiting the degree of freedom of close proximity electromagnetic iron in y direction, electromagnet arrange the waist hole of a transverse direction, and a limit shaft is fixed on carrier through waist hole, limits the degree of freedom of close proximity electromagnetic iron in z direction.Equally, also bearing can be installed to reduce friction at limit shaft.
Cage guide angle has at installation error, can in order to allow close proximity electromagnetic iron have small deflection freely, it and inter-agency not employing of laterally steering connect firmly completely, but are designed to the shaft hole matching that has gap
Optionally, described horizontal orientation device comprises the mounting groove be arranged on close proximity electromagnetic iron and the cross spacing axle coordinated with mounting groove, and described mounting groove coordinates with cross spacing shaft clearance, and gap location is filled with elastomeric material.
This structure can be suitable for the common installation error of guide rail, and this version can tolerate that electromagnet has faint rotation.
Optionally, also comprise:
Horizontal retracing spring, resets, away from guide rail surface for making close proximity electromagnetic iron;
Vertical retracing spring, resets for making carrier.
Vertical retracing spring is after carrier leaves initial position, reset force is provided, its reset force is much smaller than the friction force provided of close proximity electromagnetic iron, can not when stabilizing mechanism discharges, lift car is made to produce shake, and obvious impact can not be produced on the flat bed again of elevator, but still after stabilizing mechanism release, carrier can be returned to back initial position slowly.
During practice, vertical retracing spring comprises following arrangement, but is not limited to under type
1) two springs are adopted to interact, at initial position infinite place device.
2) two springs are adopted to interact, at initial position limited location device.
3) Compress Spring is adopted roller to be pushed to the V-block of a vertical direction.
Vertical retracing spring needs to overcome the dumping force of damper and the friction force between piston and casing wall when acting on, and dumping force can be very little when low velocity, so friction force can be comparatively obvious.So employing scheme 1 shortcoming is, one section of interval is had near its initial position, the thrust being subject to two springs adds the deadweight of carrier, three's vector is not enough to the friction force overcoming damper, so each time return time, carrier cannot get back to initial position accurately, so device more easily reaches displacement limits, has an effect with locating dowel pin.Employing scheme 2 or 3 can address this problem, and carrier can be made to return to initial position, and scheme 2 is compared with scheme 3, and the design space of scheme 2 is compacter.
Horizontal retracing spring is used for when close proximity electromagnetic iron discharges, and short range electromagnet is moved to initial position, getaway, horizontal retracing spring can adopt but be not limited to under type:
1) be connected on close proximity electromagnetic iron with the Compress Spring on carrier.
2 be connected on close proximity electromagnetic iron with the chip type spring on carrier.
3) be connected on close proximity electromagnetic iron with the extension spring on carrier.
Be the stress balance at upper and lower two ends owing to needing to be arranged symmetrically with, be more conducive to the translation of close proximity electromagnetic iron, above scheme can be arranged to axisymmetric two of transversely center.
Optionally, the side of the untouchable direction guiding rail of described close proximity electromagnetic is fixed with friction lining.
Comparing the lower static friction force between iron and iron, for strengthening the friction force between guide rail, the friction lining of great friction coefficient should be adopted to be attached on the adsorption plane of close proximity electromagnetic iron.
In order to obtain stable support power on guide rail, by activating close proximity electromagnetic iron absorption guide rail, the feature of close proximity electromagnetic iron is, when pressing close to adsorbed target, can produce very large adsorption affinity with very little electric current.Be have employed electromagnetic attraction for positive pressure is to provide friction force equally, and in this programme, electromagnet is directly adsorbed on the side of guide rail, magnetic confining field is produced in guide rail side and electromagnet, friction lining is fixed on the surface of electromagnet, and guide rail, as armature, does not need additional friction sheet more on the surface.
Optionally, described damper and close proximity electromagnetic iron are separately positioned on the both sides of guide rail.
Such setting is the moment of torsion be subject to reduce vertical guide piece, can reduce the distance at close proximity electromagnetic iron driving surface and damper center as far as possible, now can effectively reduce torsional forces arm lengths.
Optionally, described promotion electromagnet comprises:
Cylinder, comprises a cavity, and described cavity comprises the first cylindrical sidewalls, transition sidewall and the second cylindrical sidewalls that join successively, and wherein, the internal diameter of the first cylindrical sidewalls is greater than the internal diameter of described second cylindrical sidewalls;
Piston rod, is slidably arranged in described cavity, and piston rod comprises the large-diameter portion coordinated with the first cylindrical sidewalls and the minor diameter part coordinated with described second cylindrical sidewalls, and described minor diameter part is used for passing cylinder and coordinates with described close proximity electromagnetic iron.
In the cavity promoting electromagnet, the cavity closed is by narrow gap and extraneous UNICOM, and when electromagnet ejects, the resistance that the air in cavity is formed effectively can reduce the speed that electromagnet ejects, realize fitting slowly, effectively can reduce the absorption noise of close proximity electromagnetic iron.
Adopt the cavity with the external world of minim gap UNICOM as buffering, slow down the noise produced when guide rail is pressed close in the absorption of close proximity electromagnetic iron; During practice, this structure also can be combined into one with horizontal orientation device.
Optionally, be provided with inhibiting device between described carrier and pedestal, described inhibiting device comprises the bar shaped spacing hole of the vertical setting be arranged on pedestal, and is fixed on limited location pin on carrier, and described locating dowel pin stretches in bar shaped spacing hole.
By arranging inhibiting device, can avoid because elevator lost efficacy at flat bed, the vertical displacement amount of carrier exceedes the situation appearance of damper end position.
The signal provided by apparatus for controlling elevator when car door is opened excite, and to restore at closing time at cars.Due to the elevator promoted greatly, rocking when low floor of car is more obvious, and control system also selectively can provide excitation signal, as the only just excitation apparatus when resting in low floor
Control system also can adopt mode more targetedly to carry out the start and stop of control setup, as release gear in the process starting again flat bed, to reach higher flat bed progress, when once running on elevator prepares, first release gear, read elevator internal load weight again, to obtain weight information more accurately.
When a stabilization system cannot meet dumping force demand when lift car rocks, multiple stabilizing device collaborative work can be set.Control system selectivity can trigger wherein any one or more device, obtains appropriate dumping force.
The stabilizing mechanism of the application also can be used for cargo lift, and when reducing heavily loaded dolly turnover car, car rocks slowly, and can not away from flat bed region.Now need to adopt the close proximity electromagnetic iron of larger suction and the larger damper of application force.Its principle is identical with above-mentioned principle.
The invention also discloses the stabilizing mechanism of the second lift car, for being arranged on elevator cab, coordinate with the guide rail of elevator, stabilizing mechanism comprises:
Carrier, relative with elevator cab fixing;
Close proximity electromagnetic iron, is slidably mounted on described carrier, for being pull-in on guide rail surface;
Promoting electromagnet, sliding to guide rail for driving close proximity electromagnetic iron.
Adopt the suction between close proximity electromagnetic iron and guide rail, the damping be subject to when improving rock of car, to reduce rock of car.
Optionally, also comprise horizontal retracing spring, described horizontal retracing spring is used for close proximity electromagnetic iron is resetted, away from guide rail surface.
Optionally, the side of the untouchable direction guiding rail of described close proximity electromagnetic is fixed with friction lining.
Electromagnet is directly adsorbed on the side of guide rail, and produce magnetic confining field in guide rail side and electromagnet, friction lining is fixed on the surface of electromagnet, and guide rail, as armature, does not need additional friction sheet more on the surface.
The invention also discloses the stabilizing mechanism of another kind of lift car, for being arranged on elevator cab, coordinate with the guide rail of elevator, stabilizing mechanism comprises:
Pedestal, for relative with elevator cab fixing, pedestal is fixed with horizontal orientation device;
Carrier, with described horizontal orientation device bearing fit, carrier is fixed with vertical guide piece;
Close proximity electromagnetic iron, is slidably mounted on vertical guide piece;
Damper, relative fixing with described close proximity electromagnetic iron, the two ends of damper are connected with carrier respectively;
Promoting electromagnet, for promoting carrier direction guiding rail one lateral movement, close proximity electromagnetic iron and guide rail being reclined.
Optionally, the vertical retracing spring for making damper reset also is comprised.
Optionally, because the end of damper has slip for base supports face, in order to avoid the sliding resistance of transverse direction forms impact to the life-span of damper, the two ends of damper can be provided with antifriction-bearing box to reduce traverse resistance.
The invention has the beneficial effects as follows: adopt damper to slow down the vertical wobble produced when elevator lift car load changes rapidly, when stabilizing mechanism uses, close proximity electromagnetic iron and guide rail is driven to fit by promoting electromagnet, close proximity electromagnetic iron and guide rail pass through magnetic attraction, during stabilizing mechanism work, its friction drag does not derive from the relative sliding between close proximity electromagnetic iron and guide rail, but the hydraulic pressure of damper or air pressure resistance, during the obvious relative motion of the speed that produces between lift car and guide rail, carrier and pedestal relative motion, close proximity electromagnetic iron is motionless, damper moves, damper can provide larger antagonistic force simultaneously, lift car is impelled to calm down fast, and when car and guide rail geo-stationary, damper does not provide resistance, even if so close proximity electromagnetic iron release not with guide rail magnetic attraction, also can not produce lift car and obviously impact.
Accompanying drawing illustrates:
Fig. 1 is the stabilizing mechanism internal main view of lift car of the present invention;
Fig. 2 is the block diagram of the stabilizing mechanism of lift car of the present invention;
Fig. 3 is the schematic diagram after Fig. 2 biopsy cavity marker devices;
Fig. 4 is the stabilizing mechanism inside top figure of lift car of the present invention;
Fig. 5 is the partial schematic diagram promoting electromagnet;
Fig. 6 is the schematic diagram of the first structure of horizontal orientation device;
Fig. 7 is the schematic diagram of horizontal orientation device the second structure;
Fig. 8 is the schematic diagram of the third structure of horizontal orientation device;
Fig. 9 is the schematic diagram of horizontal orientation device the 4th kind of structure;
Figure 10 is the schematic diagram of close proximity electromagnetic iron;
Figure 11 is the structural representation of the embodiment of the present invention 2;
Figure 12 is the structural representation of the embodiment of the present invention 3.
In figure, each Reference numeral is:
1, elevator cab, 2, guide rail, 3, pedestal, 4, carrier, 5, horizontal orientation device, 6, promote electromagnet, 7, horizontal retracing spring, 8, close proximity electromagnetic iron, 9, damper, 10, vertical retracing spring, 11, bar shaped spacing hole, 12, locating dowel pin, 13, vertical guide piece, 14, cylinder, 15, piston rod, 16, first cylindrical sidewalls, 17, cavity, 18, transition sidewall, 19, second cylindrical sidewalls, 20, large-diameter portion, 21, minor diameter part, 22, guide pillar, 23, guide pin bushing, 24, limit shaft, 25, waist hole, 26, mounting groove, 27, cross spacing axle, 28, antifriction-bearing box.
Detailed description of the invention:
Below in conjunction with each accompanying drawing, the present invention is described in detail.
Embodiment 1
XYZ direction defines
As shown in figures 1-4, a kind of stabilizing mechanism of lift car, the stabilizing mechanism of this lift car is used for being arranged on elevator cab 1, and coordinate with the guide rail 2 of elevator, stabilizing mechanism comprises:
Pedestal 3, for relative with elevator cab 1 fixing, pedestal 3 is fixed with vertical guide piece 13;
Carrier 4, with vertical guide piece 13 bearing fit;
Close proximity electromagnetic iron 8, is slidably mounted on carrier 4;
Promoting electromagnet 6, sliding to guide rail 2 for driving close proximity electromagnetic iron 8;
Damper 9, one end is connected with carrier 4, and the other end is connected with pedestal 3.
During the present embodiment practice, pedestal can be arranged on top or the bottom of elevator cab 1.
During practice, damper 9 can adopt, but the damper being not limited to following kind comes:
1) two way damper, reduces rocking lift car rise and fall;
2) speed sensitivity damper, when speed of relative movement is large, provides significant dumping force, at speed of relative movement hour, provides faint dumping force;
3) adjustable damper, because temperature can form impact to the speed of damper-drag relationship, can select adjustable damper, be convenient to building site and adjust according to present case.
Defining vertical direction in the present embodiment is Y-direction (i.e. the length direction of guide rail), and come from guiding cheekn and vertical Y direction is X-direction, X-direction, Y-direction and Z-direction, mutually vertical between two.The present embodiment carrier 4 is except can prolonging the motion of y direction, and other degree of freedom of carrier 4 is all limited.
During practice, vertical guide piece 13 can adopt, but is not limited to come with under type:
1) translation line slideway, the present embodiment adopts this structure exactly.
2) the cross section circle of vertically arranging for a pair is plain bearing, and axial motion can be prolonged in its outer ring.
3) a non-circular plain bearing in cross section vertically arranged, axial motion can be prolonged in its outer ring, but cannot prolong axial rotation.
The second protection that carrier 4 and pedestal 3 should be provided with slip-off preventing during practice design, even if when vertical guide piece is destroyed, carrier can not depart from pedestal.
The promotion electromagnet 6 of the present embodiment can adopt normal traction formula electromagnet, also can adoption rate electromagnet, the former electromagnetic force obviously increases with stroke, close proximity electromagnetic iron can be caused to impact guide rail, produce noise, the size of the power output of the latter is comparatively stable, obviously can reduce impact, reduces noise.
When adopting common close proximity electromagnetic iron, sequence of operation has following three kinds of schemes,
1) close proximity electromagnetic iron and promotion electromagnet are energized simultaneously, and close proximity electromagnetic iron is pressed close to and adsorbed guide rail, and close proximity electromagnetic iron and dead electricity while of promoting electromagnet, depart from.Feature is as follows: control simple; Two electromagnet simultaneously electric time, increase impact during absorption, so noise is larger; Promote electromagnet and be in long-time state that must be electric, it is overheated easily to occur.
2) close proximity electromagnetic iron and promotion electromagnet are energized simultaneously, and close proximity electromagnetic iron is pressed close to and adsorbed guide rail, and only close proximity electromagnetic Tie Tong electricity maintains absorption, close proximity electromagnetic iron dead electricity, departs from.Feature is as follows: solve and promote the overheated problem of electromagnet.
3) promoting electromagnet obtains electric, and close proximity electromagnetic iron is near guide rail, and close proximity electromagnetic iron obtains electric absorption, promotes electromagnet dead electricity, close proximity electromagnetic iron dead electricity, departs from.Feature is as follows: solve absorption noise and promote the overheated problem of electromagnet, logic control slightly complicated.
When selecting dead electricity type close proximity electromagnetic iron and two-way close proximity electromagnetic iron, more than logical AND similar.Difference is the acting characteristic of electromagnet self.
Except common close proximity electromagnetic iron, also dead electricity type close proximity electromagnetic iron can be adopted to substitute, its advantage is: provide the adsorption affinity between guide rail by permanent magnet, and when needs discharge, only need its energising, cancelling out each other in the magnetic field of electromagnet and the magnetic field of permanent magnet, thus realizes eliminating adsorption affinity.And under not service condition, have enough gaps between close proximity electromagnetic iron and guide rail, ensure the confining force of the adsorption affinity of permanent magnet much smaller than horizontal retracing spring.
Also reversible close proximity electromagnetic iron can be selected, when dead electricity, electromagnet is provided by permanent magnet the adsorption affinity pressing close to object, when forward obtains electric, permanent magnet superposes in the same way with electromagnetic force, provides larger adsorption affinity, reverse electric time, permanent magnet and electromagnetic force are oppositely offset, and externally then do not have adsorption affinity.Select reversible close proximity electromagnetic iron, larger adsorption affinity can be obtained with small area analysis, when discharging, only need repercussion to be energized, can adsorption affinity be eliminated.
Suitable friction force is produced between close proximity electromagnetic iron and guide rail, the lift car can tackled on the one hand under common Loading conditions rocks, damage is subject on the other hand at lift car, when sharply sinking in short-term, dumping force exceedes maximum static friction force, and produces slippage between close proximity electromagnetic iron and guide rail.To protect damper.
During practice, the state of feedback stability mechanism can be carried out by arranging respective element, if occur that unit state is abnormal, reminding fault or break-off by suitable strategy.Scheme is including but not limited to under type:
1) at carrier, one stroke switch can be set between close proximity electromagnetic iron;
2) magnetic field induction element is set in close proximity electromagnetic iron, identifies whether close proximity electromagnetic iron is adsorbed on guide rail by the change of magnetic-field intensity;
3) pair of contact, gives prominence on the adsorption plane of close proximity electromagnetic iron, when close proximity electromagnetic iron absorption guide rail, by the metal surface short circuit of guide rail.
Because whether stabilizing mechanism is triggered not easily by direct detection, in order to elevator debugging convenience, one or more status indicator lamps can be set the conspicuous position outside stabilizing mechanism.Represent whether on off mode and the stabilizing mechanism of close proximity electromagnetic iron effectively work.
In the present embodiment, carrier 4 is also provided with horizontal orientation device 5, and close proximity electromagnetic iron 8 coordinates with horizontal orientation device 5.Horizontal orientation device can make close proximity electromagnetic iron on carrier, prolong x direction to move, and in order to realize guide function, horizontal orientation device can adopt and singly be not limited to following four kinds of modes:
1) guide pillar 22 of the round section of a pair lateral arrangement combines with guide pin bushing 23, and wherein, guide pillar 22 is relative with close proximity electromagnetic iron 8 fixing, guide pin bushing 23 is relative with carrier 4 fixing, see Fig. 6, can also be that guide pillar is relative with carrier fixing during practice, guide pin bushing be relative with close proximity electromagnetic iron fixing.
2) noncircular cross section of at least one lateral arrangement guide pillar 22 and combine with the guide pin bushing 23 of guide pillar adaptation, guide pillar 22 is relative with close proximity electromagnetic iron 8 fixing, guide pin bushing 23 is relative with carrier 4 fixing, see Fig. 7, can also be that guide pillar is relative with carrier fixing during practice, guide pin bushing be relative with close proximity electromagnetic iron fixing.
3) two flangings on carrier are for limiting the degree of freedom of close proximity electromagnetic iron in y direction, the two ends up and down of close proximity electromagnetic iron are furnished with two limit shafts 24, limit shaft 24 is relative with carrier 4 fixing, and limit shaft 4 is shown in Fig. 8 for limiting close proximity electromagnetic iron 8 at the degree of freedom in z direction.During practical operation, can be cliding friction between limit shaft and close proximity electromagnetic iron, also can install bearing at limit shaft, friction force when reducing mobile.
4) two flangings on carrier are for limiting the degree of freedom of close proximity electromagnetic iron in y direction, electromagnet arranges the waist hole 25 of a transverse direction, a limit shaft 24 is fixed on carrier 4 through waist hole, limits the degree of freedom of close proximity electromagnetic iron in z direction, sees Fig. 9.Equally, also bearing can be installed to reduce friction at limit shaft.
Cage guide angle has at installation error, can in order to allow close proximity electromagnetic iron have small deflection freely, it and inter-agency not employing of laterally steering connect firmly completely, but are designed to the shaft hole matching that has gap
As shown in Figure 10, in the present embodiment, horizontal orientation device 5 comprises the mounting groove 26 be arranged on close proximity electromagnetic iron 8 and the cross spacing axle coordinated with mounting groove 26 27 (being equal to guide pillar 22 above), mounting groove 26 and cross spacing axle 27 free-running fit, and gap location is filled with elastomeric material.This structure can be suitable for the common installation error of guide rail, and this version can tolerate that electromagnet has faint rotation.
As shown in Fig. 1,6 ~ 9, stabilizing mechanism also comprises:
Horizontal retracing spring 7, for making close proximity electromagnetic iron 8 reset, away from guide rail 2 surface;
Vertical retracing spring 10, resets for making carrier 4.
Vertical retracing spring is after carrier leaves initial position, reset force is provided, its reset force is much smaller than the friction force provided of close proximity electromagnetic iron, can not when stabilizing mechanism discharges, lift car is made to produce shake, and obvious impact can not be produced on the flat bed again of elevator, but still after stabilizing mechanism release, carrier can be returned to back initial position slowly.
During practice, vertical retracing spring comprises following arrangement, but is not limited to under type
1) two springs are adopted to interact, at initial position infinite place device.
2) two springs are adopted to interact, at initial position limited location device.
3) Compress Spring is adopted roller to be pushed to the V-block of a vertical direction.
Vertical retracing spring needs to overcome the dumping force of damper and the friction force between piston and casing wall when acting on, and dumping force can be very little when low velocity, so friction force can be comparatively obvious.So employing scheme 1 shortcoming is, one section of interval is had near its initial position, the thrust being subject to two springs adds the deadweight of carrier, three's vector is not enough to the friction force overcoming damper, so each time return time, carrier cannot get back to initial position accurately, so device more easily reaches displacement limits, has an effect with locating dowel pin.Employing scheme 2 or 3 can address this problem, and carrier can be made to return to initial position, and scheme 2 is compared with scheme 3, and the design space of scheme 2 is compacter.
Horizontal retracing spring is used for when close proximity electromagnetic iron discharges, and short range electromagnet is moved to initial position, getaway, horizontal retracing spring can adopt but be not limited to under type:
1) be connected on close proximity electromagnetic iron with the Compress Spring on carrier.
2 be connected on close proximity electromagnetic iron with the chip type spring on carrier.
3) be connected on close proximity electromagnetic iron with the extension spring on carrier.
Be the stress balance at upper and lower two ends owing to needing to be arranged symmetrically with, be more conducive to the translation of close proximity electromagnetic iron, above scheme can be arranged to axisymmetric two of transversely center.
In the present embodiment, close proximity electromagnetic iron 8 is fixed with friction lining (not shown in FIG.) towards the side of guide rail.Comparing the lower static friction force between iron and iron, for strengthening the friction force between guide rail, the friction lining of great friction coefficient should be adopted to be attached on the adsorption plane of close proximity electromagnetic iron.
In order to obtain stable support power on guide rail, by activating close proximity electromagnetic iron absorption guide rail, the feature of close proximity electromagnetic iron is, when pressing close to adsorbed target, can produce very large adsorption affinity with very little electric current.Be have employed electromagnetic attraction for positive pressure is to provide friction force equally, and in this programme, electromagnet is directly adsorbed on the side of guide rail, magnetic confining field is produced in guide rail side and electromagnet, friction lining is fixed on the surface of electromagnet, and guide rail, as armature, does not need additional friction sheet more on the surface.
As shown in Figure 4, in the present embodiment, damper 9 and close proximity electromagnetic iron 8 are separately positioned on the both sides of guide rail 2.Such setting is the moment of torsion be subject to reduce vertical guide piece, can reduce the distance at close proximity electromagnetic iron driving surface and damper center as far as possible, now can effectively reduce torsional forces arm lengths.
As shown in Figure 5, the promotion electromagnet 6 of the present embodiment comprises:
Cylinder 14, comprises a cavity 17, and cavity 17 comprises the first cylindrical sidewalls 16, transition sidewall 18 and the second cylindrical sidewalls 19 that join successively, and wherein, the internal diameter of the first cylindrical sidewalls 16 is greater than the internal diameter of the second cylindrical sidewalls 19;
Piston rod 15, is slidably arranged in cavity 17, and piston rod 15 comprises the large-diameter portion 20 coordinated with the first cylindrical sidewalls and the minor diameter part 21 coordinated with the second cylindrical sidewalls, and minor diameter part is used for passing cylinder and coordinates with close proximity electromagnetic iron.
In the cavity promoting electromagnet, the cavity closed is by narrow gap and extraneous UNICOM, and when electromagnet ejects, the resistance that the air in cavity is formed effectively can reduce the speed that electromagnet ejects, realize fitting slowly, effectively can reduce the absorption noise of close proximity electromagnetic iron.
Adopt the cavity with the external world of minim gap UNICOM as buffering, slow down the noise produced when guide rail is pressed close in the absorption of close proximity electromagnetic iron; During practice, this structure also can be combined into one with horizontal orientation device.
As shown in figures 2-3, be provided with inhibiting device between the carrier of the present embodiment and pedestal, inhibiting device comprises the bar shaped spacing hole 11 of the vertical setting be arranged on pedestal, and is fixed on limited location pin 12 on carrier 4, and locating dowel pin stretches in bar shaped spacing hole.By arranging inhibiting device, can avoid because elevator lost efficacy at flat bed, the vertical displacement amount of carrier exceedes the situation appearance of damper end position.
When the present embodiment uses, the signal provided by apparatus for controlling elevator when car door is opened excite, and to restore at closing time at cars.Due to the elevator promoted greatly, rocking when low floor of car is more obvious, and control system also selectively can provide excitation signal, as the only just excitation apparatus when resting in low floor
Control system also can adopt mode more targetedly to carry out the start and stop of control setup, as release gear in the process starting again flat bed, to reach higher flat bed progress, when once running on elevator prepares, first release gear, read elevator internal load weight again, to obtain weight information more accurately.
When a stabilization system cannot meet dumping force demand when lift car rocks, multiple stabilizing device collaborative work can be set.Control system selectivity can trigger wherein any one or more device, obtains appropriate dumping force.
The stabilizing mechanism of the present embodiment also can be used for cargo lift, and when reducing heavily loaded dolly turnover car, car rocks slowly, and can not away from flat bed region.Now need to adopt the close proximity electromagnetic iron of larger suction and the larger damper of application force.Its principle is identical with above-mentioned principle.
The present embodiment stabilizing mechanism is a kind of principle of work wherein:
1, in the process of elevator operation, close proximity electromagnetic iron, with under the effect of horizontal retracing spring, is in initial position, keeps certain gap with guide rail, avoids friction to produce.
2, out of service at elevator, before passenger passes in and out car, device obtains the signal coming from control system, promoting electromagnet obtains electric, and push short range electromagnet to guide pass, close proximity electromagnetic iron obtains electric, himself be adsorbed on guide rail, its adsorption affinity enough makes both keep geo-stationary.
3, lift car loads, in uninstall process, under common delivery operating mode, (namely passenger normally passes in and out lift car) adopts close proximity electromagnetic iron to be connected on guide rail by one end of damper, under general load/unload operating mode, friction force is large enough to make that close proximity electromagnetic iron is static to be attached on guide rail; When car load changes, car can move in upwards/lower direction, now connect carrier and also have relative velocity between the piston and cylinder body of the damper of pedestal, if when lift car rate of sinking increases, the resistance that hydraulic coupling between piston and cylinder body produces also will increase, and resistance is enough to the speeds control between lift car and guide rail in lower scope;
4, when car sinking or when being increased beyond between leveling zone, but still in the setting range of stabilizing mechanism maximum displacement (this value is greater than again between leveling zone).Elevator traction chance is carried out lift car when small rotation comes and is come back to level position, now stabilizing mechanism is in running order, because speed of relative movement is lower, the dumping force that damper provides is less, can not form affect the process of flat bed again and langding accuracy.Note: large hoisting depth elevator all can arrange story-leveling function again, and after namely lift car exceeds flat bed scope under door opening state, elevator traction machine will carry out fine position, make lift car reenter flat bed region.
If 5 elevators lost efficacy at flat bed; car displacement is beyond device setting value, and the locating dowel pin on carrier is by the chute end of the pedestal of slippage, and it is mobile that locating dowel pin will stop carrier to continue on pedestal; and force between close proximity electromagnetic iron and guide rail and produce Relative sliding, with fender guard self.
6, lift car loads; in uninstall process; when when lift car is subject to abnormal load impacting (such as having heavier dolly to advance lift car), hypervelocity is sunk; the antagonistic force that hydraulic damper produces exceedes the friction force that close proximity electromagnetic iron provides; produce slippage between close proximity electromagnetic iron and guide rail, damage to protect hydraulic damper to be subject to excessive pressure.
7, after lift car completes load/unload, be about to start and run next time, now lift car reaches a state of equilibrium, so now elevator car speed is zero substantially, hydraulic damper does not externally have power to export, so when after nearly device release, close proximity electromagnetic iron is getaway under the effect of retracing spring, completes this time action.
8, in upper once running process of elevator, what vertical retracing spring can be less tries hard to recommend dynamic carrier, makes it to be returned to initial position slowly, for action is next time prepared.
The stabilizing mechanism of the present embodiment improves for system rigidity relative to increase traction medium, can be greatly cost-saving.
Except improving system rigidity to carry out except increasing surely by increasing traction medium, having and carrying out stable mechanism by magnetic force in prior art, its principle is after lift car is stopped, before door is opened, by electromagnetic attraction, between guide rail and mechanism, produce friction force, stop lift car to rock; After elevator cab door is closed, before lift car reruns, cancel electromagnetic attraction, eliminate friction force, allow elevator normally run.Prior art is clamped by a pair gear mesh guide rail of driven by motor in addition.The common feature of above two kinds of methods is, mechanism provides a constant friction drag, teetertotters stop lift car.Its defect is, when constant friction force is too small, stablizing effect is not obvious, and passenger still can feel the strong sinking of car; When friction force is excessive, before lift car starts, friction force can be cancelled, and the lift car losing friction force rocks again, to reach new state of equilibrium.Secondly, in the life cycle of elevator, friction material can experience the friction repeatedly of up to a million times, and for ensureing its life-span and stability, type selecting is very difficult; Or adopt conventional friction material, but need periodic replacement.
The application adopts damper to slow down the vertical wobble produced when elevator lift car load changes rapidly, when stabilizing mechanism uses, close proximity electromagnetic iron and guide rail is driven to fit by promoting electromagnet, close proximity electromagnetic iron and guide rail pass through magnetic attraction, during stabilizing mechanism work, its friction drag does not derive from the relative sliding between close proximity electromagnetic iron and guide rail, but the hydraulic pressure of damper or air pressure resistance, during the obvious relative motion of the speed that produces between lift car and guide rail, carrier and pedestal relative motion, close proximity electromagnetic iron is motionless, damper moves, damper can provide larger antagonistic force simultaneously, lift car is impelled to calm down fast, and when car and guide rail geo-stationary, damper does not provide resistance, even if so close proximity electromagnetic iron release not with guide rail magnetic attraction, also can not produce lift car and obviously impact.
Embodiment 2
As shown in figure 11, present embodiment discloses a kind of stabilizing mechanism of lift car, for being arranged on elevator cab, coordinate with the guide rail 2 of elevator, stabilizing mechanism comprises:
Carrier 4, relative with elevator cab fixing;
Close proximity electromagnetic iron 8, is slidably mounted on carrier, for being pull-in on guide rail surface;
Promoting electromagnet 6, sliding to guide rail for driving close proximity electromagnetic iron.
Adopt the suction between close proximity electromagnetic iron and guide rail, the damping be subject to when improving rock of car, to reduce rock of car.
During practice, also comprise horizontal retracing spring, horizontal retracing spring is used for close proximity electromagnetic iron is resetted, away from guide rail surface.
During practice, the side of the untouchable direction guiding rail of close proximity electromagnetic is fixed with friction lining.Electromagnet is directly adsorbed on the side of guide rail, and produce magnetic confining field in guide rail side and electromagnet, friction lining is fixed on the surface of electromagnet, and guide rail, as armature, does not need additional friction sheet more on the surface.
The close proximity electromagnetic iron 8 of the present embodiment, the kind promoting electromagnet 6, horizontal retracing spring and friction lining or structure can be identical with embodiment 1.
Embodiment 3
As shown in figure 12, the present embodiment discloses a kind of stabilizing mechanism of lift car, and for being arranged on elevator cab, coordinate with the guide rail 2 of elevator, stabilizing mechanism comprises:
Pedestal 3, for relative with elevator cab fixing, pedestal is fixed with horizontal orientation device 5;
Carrier 4, with horizontal orientation device bearing fit, carrier is fixed with vertical guide piece 13;
Close proximity electromagnetic iron 8, is slidably mounted on vertical guide piece;
Damper 9, relative with close proximity electromagnetic iron fixing, the two ends of damper are connected with carrier respectively;
Promoting electromagnet 6, for promoting carrier direction guiding rail one lateral movement, close proximity electromagnetic iron and guide rail being reclined.
In the present embodiment, also comprise the vertical retracing spring 10 for making damper reset.
In the present embodiment, because the end of damper has slip for base supports face, in order to avoid the sliding resistance of transverse direction forms impact to the life-span of damper, the two ends of damper can be provided with antifriction-bearing box 28 to reduce traverse resistance.
The foregoing is only the preferred embodiments of the present invention; not thereby scope of patent protection of the present invention is namely limited; the equivalent structure transformation that every utilization specification sheets of the present invention and accompanying drawing content are done; directly or indirectly be used in the technical field that other are relevant, be all in like manner included in protection scope of the present invention.
Claims (10)
1. a stabilizing mechanism for lift car, for being arranged on elevator cab, coordinating with the guide rail of elevator, it is characterized in that, comprising:
Pedestal, for relative with elevator cab fixing, pedestal is fixed with vertical guide piece;
Carrier, with described vertical guide piece bearing fit;
Close proximity electromagnetic iron, is slidably mounted on described carrier;
Promoting electromagnet, sliding to guide rail for driving close proximity electromagnetic iron;
Damper, one end is connected with described carrier, and the other end is connected with described pedestal.
2. the stabilizing mechanism of lift car as claimed in claim 1, it is characterized in that, carrier is also provided with horizontal orientation device, and described close proximity electromagnetic iron coordinates with horizontal orientation device.
3. the stabilizing mechanism of lift car as claimed in claim 2, it is characterized in that, described horizontal orientation device comprises the mounting groove be arranged on close proximity electromagnetic iron and the cross spacing axle coordinated with mounting groove, and described mounting groove coordinates with cross spacing shaft clearance, and gap location is filled with elastomeric material.
4. the stabilizing mechanism of lift car as claimed in claim 1, is characterized in that, also comprise:
Horizontal retracing spring, resets, away from guide rail surface for making close proximity electromagnetic iron;
Vertical retracing spring, resets for making carrier.
5. the stabilizing mechanism of lift car as claimed in claim 1, it is characterized in that, the side of the untouchable direction guiding rail of described close proximity electromagnetic is fixed with friction lining.
6. the stabilizing mechanism of lift car as claimed in claim 1, it is characterized in that, described damper and close proximity electromagnetic iron are separately positioned on the both sides of guide rail.
7. the stabilizing mechanism of lift car as claimed in claim 1, it is characterized in that, described promotion electromagnet comprises:
Cylinder, comprises a cavity, and described cavity comprises the first cylindrical sidewalls, transition sidewall and the second cylindrical sidewalls that join successively, and wherein, the internal diameter of the first cylindrical sidewalls is greater than the internal diameter of described second cylindrical sidewalls;
Piston rod, is slidably arranged in described cavity, and piston rod comprises the large-diameter portion coordinated with the first cylindrical sidewalls and the minor diameter part coordinated with described second cylindrical sidewalls, and described minor diameter part is used for passing cylinder and coordinates with described close proximity electromagnetic iron.
8. the stabilizing mechanism of lift car as claimed in claim 1, it is characterized in that, inhibiting device is provided with between described carrier and pedestal, described inhibiting device comprises the bar shaped spacing hole of the vertical setting be arranged on pedestal, and being fixed on limited location pin on carrier, described locating dowel pin stretches in bar shaped spacing hole.
9. a stabilizing mechanism for lift car, for being arranged on elevator cab, coordinating with the guide rail of elevator, it is characterized in that, comprising:
Carrier, relative with elevator cab fixing;
Close proximity electromagnetic iron, is slidably mounted on described carrier, for being pull-in on guide rail surface;
Promoting electromagnet, sliding to guide rail for driving close proximity electromagnetic iron.
10. a stabilizing mechanism for lift car, for being arranged on elevator cab, coordinating with the guide rail of elevator, it is characterized in that, comprising:
Pedestal, for relative with elevator cab fixing, pedestal is fixed with horizontal orientation device;
Carrier, with described horizontal orientation device bearing fit, carrier is fixed with vertical guide piece;
Close proximity electromagnetic iron, is slidably mounted on vertical guide piece;
Damper, relative fixing with described close proximity electromagnetic iron, the two ends of damper are connected with carrier respectively;
Promoting electromagnet, for promoting carrier direction guiding rail one lateral movement, close proximity electromagnetic iron and guide rail being reclined.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610158583.XA CN105565122B (en) | 2016-03-18 | 2016-03-18 | The stabilizing mechanism of lift car |
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| CN201610158583.XA CN105565122B (en) | 2016-03-18 | 2016-03-18 | The stabilizing mechanism of lift car |
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| CN105565122B CN105565122B (en) | 2018-03-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112499436A (en) * | 2020-12-11 | 2021-03-16 | 湖州职业技术学院 | Multi-degree-of-freedom weak connection node additionally provided with elevator steel shaft |
| WO2022027882A1 (en) * | 2020-08-03 | 2022-02-10 | 迅达（中国）电梯有限公司 | Control method for car damping device |
| WO2023204485A1 (en) * | 2022-04-22 | 2023-10-26 | 현대엘리베이터주식회사 | Device for reducing bouncing of elevator car |
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| CN112499436A (en) * | 2020-12-11 | 2021-03-16 | 湖州职业技术学院 | Multi-degree-of-freedom weak connection node additionally provided with elevator steel shaft |
| WO2023204485A1 (en) * | 2022-04-22 | 2023-10-26 | 현대엘리베이터주식회사 | Device for reducing bouncing of elevator car |
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| CN105565122B (en) | 2018-03-23 |
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