CN207046627U - A kind of Lift car type elevator speed-limiting device - Google Patents
A kind of Lift car type elevator speed-limiting device Download PDFInfo
- Publication number
- CN207046627U CN207046627U CN201721035522.0U CN201721035522U CN207046627U CN 207046627 U CN207046627 U CN 207046627U CN 201721035522 U CN201721035522 U CN 201721035522U CN 207046627 U CN207046627 U CN 207046627U
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- China
- Prior art keywords
- speed
- pinch rollers
- snib
- detection means
- hoistway
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Abstract
It the utility model is related to elevator speed limit field,More specifically,It is related to a kind of Lift car type elevator speed-limiting device,Including the speed limit detection means installed in cage side and it is fixed on the ripple glaze pad of hoistway side,The speed limit detection means of the cage side is contradicted on the ripple glaze pad of hoistway side by flexible member,When car makees movement in vertical direction in hoistway,Speed limit detection means makees the waveform motion of vertical direction,The speed limit detection means passes through machinery inertial principle detection speed,Lift car type elevator speed-limiting device disclosed in the utility model,Speed limit detection means is integrally concentrated on car,Therefore save in the past in the speed limiter wire rope of hoistway side,The complicated mechanical structure such as steel wire rope stretching device and rope break detection device,Simplify installation,Maintenance difficulties,In addition,The utility model is using non-rail friction formula velocity measuring technique,Avoid cause because pressure is unbalanced frictional force can not reliable guarantee the problem of.
Description
Technical field
Elevator speed limit field is the utility model is related to, more particularly, to a kind of Lift car type elevator speed-limiting device.
Background technology
Traditional elevator limiter of speed is generally installed on the top of computer room or hoistway, is made by speed limiter wire rope and lift car
Annular connection, makes the speed of car synchronous with limiter of speed, and the rotating speed of limiter of speed is then detected by mechanisms such as centrifugal hammers, works as rotating speed
Crush trigger formula safety tongs and electrical safety loop protection when reaching protection limitation.
Traditional elevator limiter of speed advantage is that detection process is purely mechanic action, without provide power supply also can normal work,
But its shortcoming is associated mechanisms complexity, including tensioning apparatus in limiter of speed body, speed limiter wire rope, hoistway, disconnected rope detection
Device etc., the problems such as hoistway space utilization rate is low, and material cost is higher, particularly its installation, maintenance of machine-roomless lift is caused to be made
Industry is especially difficult.
The patented technology of some new car type speed-limiting devices, such as west are also gradually proposed in the development of industry technology at present
Sub this patent CN101301976B and SJEC Corporation patent CN102514996A difficult to understand, this two parts specially
The basic ideas of profit are by way of frictional drive, in cage side increase friction pulley and guide rail coordinated operation, make car
Movement velocity can embody on friction pulley, then centrifuge hammer mechanism by friction pulley internal build, when friction wheel speed reaches
Hammer mechanism is centrifuged during one limit value and touches related organization, and lifting braking wedge implements braking under the dynamic action of friction pulley
Protection.
The shortcomings that this two parts of patents is, when car in hoistway up and down in running when because elevator installation quality
Problem, hoistway compress random air flow problems, reason, the car such as personnel activity can be constantly in the swing state of certain amplitude in sedan-chair,
Therefore friction pulley and guide pass pressure in itself and unstable.In addition to improve car operational efficiency and relatively low operation noise,
Guide pass is very smooth, and the guide pass of part specification will also go up lubricating oil, that is to say, that the friction between friction pulley and guide rail
Power is difficult to determine.Therefore, it is difficult to ensure that using the speed sync of frictional force realization and the purpose of drive lifting rod, as
For safety device, this problem is extremely serious.
In addition, progressively occur using function electronic security(ELSEC) to clamp dress for the electronic safety of design concept in elevator industry
Put, these devices only need car speed reach need protection when provide an electrical trigger signal it is achieved that and
It can realize that remote status is recovered, but still lack cage side reliably mechanical limiter of speed cooperation at present, therefore, it is difficult to large area
Promote.
It is therefore proposed that a kind of Lift car type elevator speed-limiting device for solving the above problems is actually necessary.
Utility model content
The utility model is to overcome at least one defect described in above-mentioned prior art（Deficiency）, there is provided a kind of installation completely
In car, structure is safe and reliable, need not power mechanical Lift car type elevator speed-limiting device.
In order to solve the above technical problems, the technical solution of the utility model is as follows：A kind of Lift car type elevator speed-limiting device, bag
Include the speed limit detection means for being arranged on cage side and the ripple glaze pad for being fixed on hoistway side, the speed limit detection dress of the cage side
Put and contradicted by flexible member on the ripple glaze pad of hoistway side, when car makees movement in vertical direction in hoistway, speed limit detection
Device makees the waveform motion of vertical direction, and the speed limit detection means is examined speed limit by machinery inertial principle detection speed
Survey device integrally concentrate on car, therefore save in the past the speed limiter wire rope of hoistway side, steel wire rope stretching device and
The complicated mechanical structure such as rope break detection device, simplifies installation, maintenance difficulties, in addition, the utility model is led using non-
The frictional velocity measuring technique of rail, avoid cause because pressure is unbalanced frictional force can not reliable guarantee the problem of.
Further, the speed limit detection means include with constant weight and the pinch rollers of preset elastic pressure and
With spacing movable snib, when car above-below direction moves, pinch rollers are in the presence of thrust along hoistway side wave
Slippage pad makees wave motion, and the speed of service of car can be reflected by the amount of casting aside of pinch rollers connecting rod horizontal hunting, snib
Default speed-limiting protection operating point, when pinch rollers connecting rod pushed amount is more than or equal to preset, snib enters triggering speed-limiting protection
Position.
Or the speed limit detection means include the non-positive round pinch rollers with constant weight and preset elastic pressure with
And make wave fortune along hoistway side plane in the presence of thrust with spacing movable snib, the non-positive round pinch rollers
Dynamic, the car speed of service can reflect that snib is limited in advance by the amount of casting aside of the horizontal swing of the pinch rollers connecting rod of non-positive round
Fast protection act point, when pinch rollers connecting rod pushed amount is more than or equal to preset, snib enters triggering speed-limiting protection position.
Further, in addition to energy-accumulating element, safety tongs connecting rod, wedge and guide rail, the snib are compacted idler-wheel connecting-rod
It is pushed into trigger speed-limiting protection position, in the presence of energy-accumulating element, safety tongs connecting rod is lifted up wedge, makes its clamping guide-rail,
Implement the safe clamp brake protection of car overspeed descending.
Further, in addition to electronic over-speed governor, pinch rollers and the pinch rollers connecting rod are pushed to triggering speed limit
Protective position, the triggering speed-limiting protection position are arranged on the electric trigger mechanism of electronic over-speed governor, trigger electric trigger mechanism
Implement the safety tongs braking maneuver of car speeding.
Further, in addition to self- recoverage spring, when the pinch rollers interlinking lever end is less than snib, in self- recoverage bullet
In the presence of spring, snib recovers stuck state again, and safety tongs connecting rod can not move up, and energy-accumulating element accumulation of energy again, that is, limits
Speed detector recovers idle protection state.
Further, hoistway both ends extreme position sets special height, makes pinch rollers and its pinch rollers connecting rod
Enter speed-limiting protection trigger position snib can be pushed directly on away from the case of without throwing, implement hoistway end station extreme position and protect
Shield, by forbidding running position to set limit protection trigger at hoistway both ends, make pinch rollers and safety tongs connecting rod in nothing
Need to throw can push directly on snib away from the case of enters speed-limiting protection trigger position, so that safety tongs acts, implements hoistway
End station extreme position is protected, so as to substitute conventional shaft bottom buffer usage.
Compared with prior art, the beneficial effect of technical solutions of the utility model is：
（1）Lift car type elevator speed-limiting device disclosed in the utility model, speed limit detection means is integrally concentrated on car,
Therefore save in the past in the complicated machinery such as speed limiter wire rope, steel wire rope stretching device and rope break detection device of hoistway side
Structure, simplify installation, maintenance difficulties, in addition, the utility model using non-rail friction formula velocity measuring technique, avoid because
Pressure is unbalanced cause frictional force can not reliable guarantee the problem of.
（2）Lift car type elevator speed-limiting device disclosed in the utility model, when car vertical speed reaches predetermined value,
The horizontal direction of pinch rollers, which is swung, reaches precalculated position, and promotes snib, and the thrust of pinch rollers only needs in the horizontal direction
Overcome the horizontal direction frictional force of snib, therefore pinch rollers achieve that speed-limiting protection without larger motive force
Triggering.
（3）Lift car type elevator speed-limiting device disclosed in the utility model, when the pushed amount of pinch rollers is more than or equal to snib
Preset value when, now ascending for elevator or descending excessive velocities, the speed-limiting protection action-trigger action on snib, so as to
Lock guide rail and realize braking protection.
（4）Lift car type elevator speed-limiting device disclosed in the utility model, by forbidding running position to install at hoistway both ends
Extreme position trigger is put, pinch rollers and safety tongs connecting rod is being pushed directly on snib entrance away from the case of without throwing
Speed-limiting protection trigger position, so that safety tongs acts, implement the protection of hoistway end station extreme position, so as to substitute conventional hoistway bottom
Portion's buffer usage.
Brief description of the drawings
Fig. 1 is that speed limit detection means is arranged on the structural representation on car in the utility model.
Fig. 2 is the structural representation that speed limit detection means is in triggering state in the utility model.
Fig. 3 is that speed limit detection means is in the structural representation for locking state to be triggered in the utility model.
Fig. 4 is that two ends set the structural representation of ripple glaze pad on the inside of hoistway in the utility model.
Fig. 5 is the structural representation of the non-positive round pinch rollers of speed limit detection means in the utility model.
In figure, 1 be car, 2 be safety tongs, 3 be guide rail, 4 be ripple glaze pad, 4a is plain cushion, 5 is limited speed detector, 6
Be safety tongs framework for safety tongs connecting rod, 7,8 be energy-accumulating element, 9 be wedge, 10 be pinch rollers, 10a be that non-circular compresses
Roller, 11 are snib.
Embodiment
Accompanying drawing being given for example only property explanation, it is impossible to be interpreted as the limitation to this patent；It is attached in order to more preferably illustrate the present embodiment
Scheme some parts to have omission, zoom in or out, do not represent the size of actual product；To those skilled in the art,
Some known features and its explanation may be omitted and will be understood by accompanying drawing.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together or be indirectly connected with by intermediary, can be with
Say the connection of two element internals.For the ordinary skill in the art, it can understand that above-mentioned term exists with concrete condition
Concrete meaning of the present utility model.The technical solution of the utility model is done further with reference to the accompanying drawings and examples
It is bright.
As shown in figure 1, a kind of Lift car type elevator speed-limiting device, including car 1, be fixed on the inside of hoistway ripple glaze pad 4,
With speed limit detection means 5；The speed limit detection means 5 be arranged on car 1 on, and with the 4 inconsistent work of ripple glaze pad on the inside of hoistway
The waveform motion of vertical direction, the safety tongs 2 of energy-storage type are connected by the position of snib 11 of safety tongs connecting rod 6 and speed-limiting device 5
Connect, in the present embodiment, ripple glaze pad 4 is combined by the moulding of industrial plastic, is fixed on the base of guide rail 3,
Wherein, speed limit detection means 5 can be one or more groups of in the present embodiment, to set one group respectively in the both sides of guide rail, will limit
Speed detector 5 is overall to be concentrated on car 1, therefore saves the speed limiter wire rope in hoistway side, steel wire tensioning in the past
The complicated mechanical structure such as device and rope break detection device, simplifies installation, maintenance difficulties, in addition, what the utility model used
Non- rail friction formula velocity measuring technique, avoid cause because pressure is unbalanced frictional force can not reliable guarantee the problem of.
As Figure 2-3, speed limit detection means 5 include with constant weight and the pinch rollers 10 of preset elastic pressure,
Flexible member and it is connected on car 1 with spacing movable snib 11, flexible member one end with snib 11, the other end
Contradicted by pinch rollers 10 on the pad 4 on the inside of hoistway, when car vertical speed reaches predetermined value, pinch rollers
10 horizontal direction, which is swung, reaches precalculated position, and promotes snib 11, and the thrust of pinch rollers 10 only needs in the horizontal direction
Overcome the horizontal direction frictional force of snib, therefore pinch rollers 10 achieve that speed-limiting protection without larger motive force
Triggering.
In the utility model, safety tongs 2 passes through safety tongs connecting rod 6 and the speed-limiting protection action-trigger phase on snib 11
Connection, snib 11 is driven to move by safety tongs connecting rod 6, when reaching trigger position, you can the speed limit on triggering snib 11 is protected
Action-trigger running is protected, when needing to recover, state can be set by human hand or other machinery auxiliary before recovering idle protection
It is standby to be pushed away under safety tongs connecting rod, when the end of safety tongs connecting rod 6 is less than snib 11, in the presence of self- recoverage spring, snib weight
New to recover stuck state, now safety tongs connecting rod can not move up, and energy-accumulating element accumulation of energy again, i.e. speed limit detection means recover
Idle protection state.
Wherein, safety tongs 2 includes safety tongs framework 7, energy-accumulating element 8 and the wedge 9 for clamping safety tongs connecting rod 6, peace
After full pincers connecting rod 6 passes through energy-accumulating element 8, it is connected with the wedge 9 in safety tongs framework 7, in actual applications, due to
Snib 11 is compacted roller 10 and safety tongs connecting rod 6 is pushed into trigger speed-limiting protection position, can not be by the safety tongs with energy-accumulating element 8
Connecting rod 6 props up, and in the presence of energy-accumulating element 8, safety tongs connecting rod 6 is lifted up wedge, makes its clamping guide-rail 3, implements car 1
The safe clamp brake protection of overspeed descending, in addition it is also possible to set electronic over-speed governor to substitute mechanical safety tongs, is rolled when compressing
Wheel 10 and safety tongs connecting rod 6 are pushed on the electric trigger mechanism of triggering speed-limiting protection position, and electronic over-speed governor can trigger electricity
Minor speed limiting mechanism implements the safety tongs braking maneuver of car speeding.
In the utility model, energy-accumulating element 8 is spring or mechanical accumulated energy part, in a particular application, can also be by making
Replaced with other with devices of accumulation of energy function, its within the scope of protection of the utility model, wherein, in hoistway
The forbidding of side is provided with extreme position trigger in the area of running position, by forbidding running position to set the limit at hoistway both ends
Location trigger, pinch rollers and safety tongs connecting rod is set to push directly on snib away from the case of into speed limit guarantor without throwing
Trigger position is protected, so that safety tongs acts, implements the protection of hoistway end station extreme position, so as to substitute conventional shaft bottom buffering
Device purposes.
Further, since in view of the protection of up hypervelocity, one or more groups of speed limit detection dresses can also be set in counterweight-side
5 are put, speed limit detection means 5 makes the pinch rollers 10 of the front end of speed limit detection means 5 reliably contradict hoistway side wave by preset spring
The gasket surface of Slippage, because the structure of pinch rollers is employed, therefore between ripple glaze pad 4 and speed limit detection means 5 simultaneously
It is non-to use frictional drive, the uncontrollability for implementing velocity measuring by frictional force is avoided, when car 1 makees vertical direction in hoistway
During motion, pinch rollers 10 can produce similar waveform and move in vertical direction, due to caused by the deadweight of pinch rollers 10
Inertia force is acted on, and the inertia that its wave swings the speed generation wave top that can be moved with the above-below direction of car 1 is cast aside now
As, and the distance cast aside is directly proportional to the speed of movement in vertical direction, the utility model is exactly to be detected using this mechanical property
The speed that lift car moves up and down.When the vertical speed of car 1 reaches predetermined value, the horizontal direction pendulum of pinch rollers 10
It is dynamic to reach precalculated position, and snib 11 is promoted, the thrust of pinch rollers only needs to overcome the level of snib 11 in the horizontal direction
Direction frictional force, therefore pinch rollers 10 achieve that the triggering of speed-limiting protection without larger motive force.
And speed-limiting protection, in the state of not being triggered, safety tongs 2 can be one group of machine to be triggered with energy-accumulating element 8
Structure, snib 11 pin the linkage of energy storage equipment 8 in vertical direction, it is constantly in accumulation of energy state to be triggered, work as snib
11 by Level Promoting to speed-limiting protection position when, safety tongs energy-accumulating element 8 is no longer lockable, release mechanical energy driving safety tongs connect
Bar 6 above puies forward wedge 9, its clamping guide-rail 3 is implemented the braking protection of car overspeed descending, and in speed limit detection means 5 and band
After the safety tongs 2 of energy storage equipment implements action protection, by the auxiliary equipment of human hand or other machinery by under safety tongs connecting rod 6
Push away, energy-accumulating element 8 is recovered energy accumulating state, snib 11 reenters lock-out state in the presence of back-moving spring, then speed limit is examined
Survey device 5 and energy storage type safe pincers 2 recover idle protection state.
In addition, under the non-triggering state of speed-limiting protection, safety tongs 2 can also be the electronic safety jaw mechanism of driven by power,
When pinch rollers 10 and its Level Promoting connecting rod are pushed into speed-limiting protection position, connecting rod can trigger the electricity of electronic safety pincers
Gas trigger mechanism, electronic safety pincers implement the braking protection of car overspeed descending under electric power effect, wherein, the utility model
The energy storage equipment 8 mentioned can be that spring can also be the mechanical accumulated energy part such as shell fragment, and pad can be that plastic material can also
Be other such as metals or timber be suitable for the utility model proposes technical scheme.
Embodiment one
Pinch rollers 10 are round type, and the surface of ripple glaze pad 4 is in wavy, such design, can be effectively reduced
Friction between pinch rollers 10 and hoistway side ripple glaze pad 4, only realizes the preset conflict power of horizontal direction, therefore can realize
Reliable velocity measuring, the uncontrollability for implementing velocity measuring by frictional force is avoided, as shown in figure 4, being hoistway side wave
Line pad 4 runs to the extreme positions at hoistway both ends in car 1, and its horizontal direction is highly arranged to special height, examines speed limit
Snib 11 is directly pushed into speed-limiting protection position by the push rod for surveying the pinch rollers 10 of device 5, and this design can be realized when car is anticipated
When running to hoistway terminal limitation target phase outside, directly pass through the stop elevator car 1 of safety tongs device 2, implement hoistway buffer
Defencive function, so as to save existing hoistway buffer device.
Embodiment two
As shown in figure 5, pinch rollers can also be non-circular pinch rollers 10a, and with certain deadweight and
It is horizontal to well enclosure precompressed resiliency characteristics, now pad of the hoistway side without ripple glaze, but use with certain frictional force
Plain cushion 4a, when the vertical speed of car 1 reaches predetermined value, the pinch rollers 10a of non-positive round can equally produce ripple
Shape wave move, cast aside in the horizontal direction swing it is proportional with movement in vertical direction speed, then promote snib when reaching precalculated position
11, in the horizontal direction non-positive round pinch rollers 10a thrust only need to overcome the horizontal direction frictional force of snib 11, therefore
Non- positive round pinch rollers 10a achieves that the triggering of speed-limiting protection without larger motive force.
In figure, position relationship being given for example only property explanation is described, it is impossible to be interpreted as the limitation to this patent；Obviously, this reality
The utility model example is only intended to clearly illustrate with new above-described embodiment, and is not to the utility model
Embodiment restriction.For those of ordinary skill in the field, can also make on the basis of the above description
Other various forms of changes or variation.There is no necessity and possibility to exhaust all the enbodiments.It is all new in this practicality
All any modification, equivalent and improvement made within the spirit and principle of type etc., should be included in the utility model right will
Within the protection domain asked.
Claims (7)
1. a kind of Lift car type elevator speed-limiting device, including speed limit detection means installed in cage side and it is fixed on hoistway side
Ripple glaze pad, it is characterised in that the speed limit detection means of the cage side contradicts the ripple glaze in hoistway side by flexible member
On pad, when car makees movement in vertical direction in hoistway, speed limit detection means makees the waveform motion of vertical direction, the speed limit
Detection means passes through machinery inertial principle detection speed.
2. Lift car type elevator speed-limiting device according to claim 1, it is characterised in that the speed limit detection means includes tool
There are the pinch rollers of constant weight and preset elastic pressure and with spacing movable snib, when car above-below direction moves
When, pinch rollers make wave motion in the presence of thrust along hoistway side ripple glaze pad, and the speed of service of car can pass through
The amount of casting aside the reflection of pinch rollers connecting rod horizontal hunting, snib presets speed-limiting protection operating point, when pinch rollers connecting rod pushed amount
During more than or equal to preset, snib enters triggering speed-limiting protection position.
3. Lift car type elevator speed-limiting device according to claim 1, it is characterised in that the speed limit detection means includes tool
There are the non-positive round pinch rollers of constant weight and preset elastic pressure and with spacing movable snib, the non-positive round pressure
Tight roller makees wave motion in the presence of thrust along hoistway side plane, and the car speed of service can pass through the compression of non-positive round
The amount of casting aside the reflection of the horizontal swing of idler-wheel connecting-rod, snib presets speed-limiting protection operating point, when pinch rollers connecting rod pushed amount is big
When equal to preset, snib enters triggering speed-limiting protection position.
4. the Lift car type elevator speed-limiting device according to Claims 2 or 3, it is characterised in that also including energy-accumulating element, safety
Connecting rod, wedge and guide rail are clamped, the snib is compacted idler-wheel connecting-rod and is pushed into trigger speed-limiting protection position, in the effect of energy-accumulating element
Under, safety tongs connecting rod is lifted up wedge, makes its clamping guide-rail, implements the safe clamp brake protection of car overspeed descending.
5. the Lift car type elevator speed-limiting device according to Claims 2 or 3, it is characterised in that also including electronic over-speed governor, institute
State pinch rollers and pinch rollers connecting rod is pushed to triggering speed-limiting protection position, the triggering speed-limiting protection position is arranged on electronics limit
On the electric trigger mechanism of fast device, the safety tongs braking maneuver that electric trigger mechanism implements car speeding is triggered.
6. the Lift car type elevator speed-limiting device according to Claims 2 or 3, it is characterised in that also including self- recoverage spring, institute
When stating pinch rollers interlinking lever end and being less than snib, in the presence of self- recoverage spring, snib recovers stuck state, safety tongs again
Connecting rod can not move up, and energy-accumulating element accumulation of energy again, i.e. speed limit detection means recover idle protection state.
7. Lift car type elevator speed-limiting device according to claim 4, it is characterised in that hoistway both ends extreme position is set
Special height is put, pinch rollers and its pinch rollers connecting rod is being pushed directly on snib away from the case of into limit without throwing
Speed protection trigger position, implements the protection of hoistway end station extreme position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721035522.0U CN207046627U (en) | 2017-08-18 | 2017-08-18 | A kind of Lift car type elevator speed-limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721035522.0U CN207046627U (en) | 2017-08-18 | 2017-08-18 | A kind of Lift car type elevator speed-limiting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207046627U true CN207046627U (en) | 2018-02-27 |
Family
ID=61503038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721035522.0U Expired - Fee Related CN207046627U (en) | 2017-08-18 | 2017-08-18 | A kind of Lift car type elevator speed-limiting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207046627U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111824883A (en) * | 2019-04-15 | 2020-10-27 | 杭州沪宁电梯部件股份有限公司 | Diagnosis maintenance system based on elevator car |
| CN114715745A (en) * | 2020-12-22 | 2022-07-08 | 迅达（中国）电梯有限公司 | Hoistway magnetic stripe overspeed device tensioner and elevator car position detection device |
-
2017
- 2017-08-18 CN CN201721035522.0U patent/CN207046627U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111824883A (en) * | 2019-04-15 | 2020-10-27 | 杭州沪宁电梯部件股份有限公司 | Diagnosis maintenance system based on elevator car |
| CN111824883B (en) * | 2019-04-15 | 2022-01-11 | 杭州沪宁电梯部件股份有限公司 | Diagnosis maintenance system based on elevator car |
| CN114715745A (en) * | 2020-12-22 | 2022-07-08 | 迅达（中国）电梯有限公司 | Hoistway magnetic stripe overspeed device tensioner and elevator car position detection device |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180227 Termination date: 20210818 |