CN207861686U - A kind of elevator of more host drivens - Google Patents
A kind of elevator of more host drivens Download PDFInfo
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- CN207861686U CN207861686U CN201820000814.9U CN201820000814U CN207861686U CN 207861686 U CN207861686 U CN 207861686U CN 201820000814 U CN201820000814 U CN 201820000814U CN 207861686 U CN207861686 U CN 207861686U
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Abstract
The utility model discloses a kind of more host driven elevators, including traction machine, steel wire rope, regulating wheel, car, counterweight, the at least two or more traction machine of the elevators of more host drivens, wherein all traction machines are distributed between lift car and counterweight, it is mounted in elevator(lift) machine room or hoistway by main machine base, passes through steel wire rope tractive driving.The regulating wheel is mounted between traction machine, can adjust the cornerite of traction machine steel wire rope, and regulating wheel is equipped with spring assembly, and the steel wire rope between traction machine has tensioning adjustment effect, can eliminate the instantaneous asynchrony phenomenon occurred between traction machine.The multiple traction machine provides driving force and speed for a unified steel wire rope group in series, realizes multiple drive power and multistage brake.The car and the outside to focusing on traction machine can be suspended on than in a manner of in elevator shaft by a variety of suspensions.The elevator of the utility model not only makes elevator cost lower, and installation maintenance is easier, also more energy saving and safe and reliable.
Description
Technical field
The utility model is related to elevator technology fields, and in particular to a kind of elevator of more host drivens.
Background technology
Existing elevator includes generally traction machine, steel wire rope, car, counterweight, guide rail, door, control system, safety device, limit
Speed variator, wherein car and counterweight by steel wire rope anastomosis on traction machine, by traction machine driving car with to focusing on well
In road along guide rail up and down run, by control system make car stop to needs floor position, passenger can by door into
Enter or exit, to ensure that passenger safety and elevator are reliable for operation, existing elevator is equipped with safety device and speed-limiting device.Existing electricity
A terraced fixed car, a fixed counterweight promote people or cargo by the frictional force of steel wire rope on the traction sheave.Structure letter
Singly have 1:The elevator of 1 suspension ratio, the disadvantage is that efficiency is low, speed is low, manufacturing cost is high, therefore mostly uses car and counterweight greatly
All use 2：The elevator of 1 suspension ratio, 2：Than being the principle using movable pulley, the stroke of rope is the two of object stroke for 1 suspension
Times, the speed of rope is twice of object speed, and the stress of rope is the half of the power of object.The elevator of prior art described above
Feature, which is an elevator, to be had and an only host, and elevator is needed with higher speed or more load capacity or needs elevator
When the occasion of variable-speed operation, it is necessary to which development rate is faster or the high-power driving host of loading capacity bigger.High-power driving master
That there are volumes is big for machine, and manufacturing cost is high, installation difficulty is big, the exploitation manufacturing cycle is long, replaces the problems such as maintenance difficulties are big, to elevator
Development and application bring adverse effect.
To solve the problems, such as single driving host, a kind of existing double host synchronizations driving elevators, publication No.：CN 104760870
A, a kind of double host synchronizations drive elevator, including two hosts, car, counterweight, guide rail, diversion sheave, directive wheel, steel wires
Rope, computer room put beam, the elevator there are two traction machine, two directive wheels, two counterweights, the car two traction machines it
Between, two counterweights are respectively in the outside of two traction machines.Two host synchronizations of the elevator pair require height, to elevator track forces
It is very little to require greatly, to increase counterweight, directive wheel, steel wire rope, diversion sheave, of high cost, the application of unfavorable elevator also cannot achieve more
More host drivens.
Invention content
The utility model provides a kind of elevator of more host drivens, solves the application limitation of single host driving elevator,
Can meet the needs of various speed and load, accomplish that cost is lower, space smaller safeguards to replace being more convenient, is simple.More hosts
The elevator of driving realizes multiple drive power, multistage brake, security reliability higher, more energy saving.
The utility model provides a kind of elevator of more host drivens, including traction machine, steel wire rope, regulating wheel, car, right
Again, at least two or more traction machine of the elevator of more host drivens, plurality of traction machine are distributed in electricity
It between terraced car and counterweight, is fixed in elevator(lift) machine room or hoistway by mounting seat, is coupled by steel wire rope and driven.The electricity
Terraced steel wire rope sequentially passes through counterweight, first traction machine, regulating wheel, second traction machine, car, and the regulating wheel installs two
Between traction machine, the steel wire rope cornerite size of two traction machines is can be adjusted according to the needs, regulating wheel is equipped with spring assembly, right
Steel wire rope between two traction machines has tensioning adjustment effect, even if two traction machines have in short-term asynchronous, can also lead to
Wheel is overregulated to eliminate the effects of the act.
The regulating wheel of the elevator can protect the abrasion of steel wire rope, the material of regulating wheel and surface treatment to use low friction
Coefficient, and regulating wheel is easier to wear relative to steel wire rope, can shield to steel wire rope, extends steel wire rope and uses the longevity
Life.
The elevator can be as needed, configures multiple traction machines, and each traction machine is cascaded, for unified steel wire rope
Group provides driving force and speed, realizes multiple drive power.Each traction machine is uniformly controlled by control system, synchronous driving and system
Stop, if deviation occurs in driving synchronism, can ensure the reliable and stable of system by the effect of regulating wheel, hoisting elevator
Running comfort.A high-power traction machine is substituted by multiple traction machines, it is not only cost-effective, it is difficult to reduce manufacture, installation, maintenance
Degree saves space, also helps steel wire rope arrangement.While ensureing traction, the abrasion of steel wire rope is reduced, improving steel wire rope makes
Use the service life.
The elevator of more host drivens, each traction machine separate configurations brake, realizes multistage brake, if there is one
A misfunctioning of brake also can be such that elevator normally stops by remaining brake, even if cannot achieve the complete stopping of elevator,
The unexpected speed of service of elevator can be at least substantially reduced, the operating frequency of each safety component of elevator is reduced, protects to the greatest extent
The safety of passenger and elevator is protected.Multistage brake not only improves the running comfort of elevator, improves passenger's boarding safety, can be with
Extend the service life of elevator components.
The elevator of more host drivens can set each traction machine to different Operation class as needed, point
For main driving traction machine and auxiliary drive traction machine, keep elevator operation more energy efficient.Main driving traction machine and auxiliary drive traction machine
It can also exchange as needed, the more preferable service life for ensureing all parts.Different operations etc. can be arranged in each traction machine
Grade and the necessary synchronization action of the brake of sequence but each traction machine, it is desirable that open simultaneously or brake.When elevator no-load uplink, electricity
When the fully loaded downlink of ladder, car load and counterweight relative equilibrium, elevator only needs main driving traction machine to work, other auxiliary drives are draged
Draw machine not work, it is only necessary to which brake is opened, and may be implemented energy saving.It can also be real according to the difference of load when multiple traction machines
The setting that existing multiple traction machines drive successively, to reach energy saving to the greatest extent.
The elevator of more host drivens of the utility model, multiple traction machines are distributed between lift car and counterweight, sedan-chair
Compartment is relatively simple for structure as the suspension of counterweight ratio, can be used 1：1、2：1、4：1 equal suspension ratio, to meet under different condition
The use of elevator, while reaching cost-effective, the effect of simple installation.
It is described with 1:1 suspension ratio is exactly that steel wire rope one end is fixed on counterweight, then sequentially passes through first traction
Machine, regulating wheel, second traction machine, last steel wire rope one end are fixed on car, the side-by-side mounting counterweight and car of traction machine.
It is described with 2:1 suspension ratio is exactly that steel wire rope one end is fixed on computer room or hoistway, and then steel wire rope is worn first
The movable pulley on counterweight is crossed, is then passed through first traction machine, regulating wheel, second traction machine, on last steel wire penetrating car
Movable pulley after be fixed on the other position of computer room or hoistway, the car is with counterweight by movable pulley thereon by traction machine steel
Cord is with 2:1 suspension ratio is suspended in lifting hoistway.
It is described with 4:1 suspension ratio is exactly that steel wire rope one end is fixed on computer room or hoistway, and then steel wire rope is worn first
First movable pulley on counterweight is crossed, the directive wheel being fixed in hoistway is then passed through, again through second movable pulley on counterweight,
Then first traction machine, regulating wheel, second traction machine are sequentially passed through, is passed through after first movable pulley being then passed through on car
Another directive wheel being fixed in hoistway eventually passes through and is fixed on computer room or hoistway after second on car movable pulley
In addition position, the car is with counterweight by passing twice through the traction machine steel wire rope of two movable pulleys thereon with 4:1 suspension
Than being suspended in lifting hoistway.
The elevator of more host drivens, mounting structure are same as above, it is only necessary to which steel wire rope is sequentially passed through first
A traction machine, second traction machine, third traction machine, n-th of traction machine increase regulating wheel between two of which traction machine.
With 2:The elevator such as Fig. 5 of 1 suspension than three host drivens.
The elevator of more host drivens can be adapted for having machine room elevator, machine-roomless lift.
Preferably, the traction machine is permanent magnetic synchronous traction machine.Permanent magnetic synchronous traction machine output rotating speed is low, and torque is big,
Requirement of the elevator in speed and load-carrying can more be met, and permanent magnetic synchronous traction machine cost is relatively low, it is efficient, it is more energy efficient.
Preferably, gear-driven traction machine may be used in the traction machine.It is preferably applied to heavy－duty, the goods of high speed
On ladder and automobile elevator.
The utility model is by the preferred arrangement to elevator host, to meet the requirement of elevator under different condition,
The application limitation for solving single host driving elevator, not only makes elevator cost lower, more energy efficient, installation maintenance is easier, needs
Computer room or hoistway space smaller, also improve elevator safety reliability.
Description of the drawings
Fig. 1 is elevator structure schematic diagram in the prior art.
Fig. 2 is the utility model 1:Structural schematic diagram of 1 suspension than double host driven elevators.
Fig. 3 is the utility model 2:Structural schematic diagram of 1 suspension than double host driven elevators.
Fig. 4 is the utility model 4:Structural schematic diagram of 1 suspension than double host driven elevators.
Fig. 5 is the utility model 2:Structural schematic diagram of 1 suspension than three host driven elevators.
Fig. 6 is the utility model 2:Structural schematic diagram of 1 suspension than more host driven elevators.
In figure：1. the first traction machine, the second traction machines of 1 (a), 1 (b) third traction machines, the n-th traction machines of 1 (n),
2. steel wire rope, 3. cars, 4. counterweights, 5. regulating wheels, the second regulating wheels of 5 (a), the n-th regulating wheels of 5 (n), 6. cars
Movable pulley, 6 (a) the second movable pulleys of car, 7. counterweight movable pulleys, 7 (a) the second movable pulleys of counterweight, 8. car directive wheels,
8 (a) counterweight directive wheels.
Specific implementation mode
Below in conjunction with the accompanying drawings, a kind of elevator of more host drivens of the utility model is described in detail.
The utility model provides a kind of elevator of more host drivens, including at least two or more tractions
Machine, these traction machines couple driving in series by unified steel wire rope group, and traction machine is all mounted in elevator
Car and counterweight between, be fixed in elevator(lift) machine room or hoistway by mounting seat.More host driven elevators can
Satisfaction has the various hoistway demands such as computer room, machine room.
As shown in Fig. 2, one kind 1:1 suspension is than double host driven elevators, including the first traction machine 1, the second traction machine 1
(a), steel wire rope 2, regulating wheel 5, car 3, counterweight 4, the first traction machine 1, the second traction machine 1 (a) are installed by base of traction machine
In elevator(lift) machine room or hoistway, 2 one end of steel wire rope is fixed on counterweight 4, sequentially passes through first traction machine 1, regulating wheel 5,
Two traction machines 1 (a), the other end are fixed on car 3, and counterweight 4 is suspended on car 3 on the outside of two traction machines.Setting first
Traction machine 1 is main driving traction machine, and the second traction machine 1 (a) is auxiliary driving traction machine, in first traction machine 1 and second
The difference of installation and adjustment wheel 5 between traction machine 1 (a), 5 installation site of regulating wheel can adjust first traction machine 1 and second
The steel wire rope cornerite size of traction machine 1 (a) can be buffered elevator and be opened by the extension and compression of the spring assembly in regulating wheel 5
Stop the asynchronous problem of moment.When elevator no-load uplink or fully loaded downlink or car load and the range of balance to focusing on setting
When, elevator only needs to open simultaneously the brake of the first traction machine 1 and the second traction machine 1 (a), is realized by the first traction machine 1
Car 3 is with counterweight 4 in lifting hoistway and along this lifting rail；When elevator no-load downlink or fully loaded uplink or car load with it is right
When focusing on outside the range of balance of setting, the first traction machine of elevator 1 drives simultaneously with the second traction machine 1 (a), come ensure car 3 with
Counterweight 4 works normally in lifting hoistway and along this guide rail.
As shown in figure 3, one kind 2:1 suspension is than double host driven elevators, including the first traction machine 1, the second traction machine 1
(a), steel wire rope 2, regulating wheel 5, car 3, counterweight 4, car movable pulley 6, counterweight movable pulley 7, the first traction machine 1, the second traction
Machine 1 (a) is mounted on by base of traction machine in elevator(lift) machine room or hoistway, and 2 both ends of steel wire rope are separately fixed at elevator(lift) machine room or well
In road, steel wire rope 2 sequentially passes through 4, first traction machines 1 of counterweight, regulating wheel 5, second traction machines 1 (a), cars 3.The sedan-chair
3 top of compartment is equipped with car movable pulley 6, and car 3 is by steel wire rope 2 with 2:1 suspension ratio is suspended in lifting hoistway, the counterweight
4 tops are equipped with counterweight movable pulley 7, and counterweight 4 is by steel wire rope 2 with 2:1 suspension ratio is suspended in lifting hoistway, counterweight 4 and sedan-chair
Compartment 3 is suspended on the outside of two traction machines.It is main driving traction machine to set the first traction machine 1, and the second traction machine 1 (a) is that auxiliary is driven
Dynamic traction machine, the installation and adjustment wheel 5 between first traction machine 1 and second traction machine 1 (a), 5 installation site of regulating wheel is not
With the steel wire rope cornerite size that can adjust first traction machine 1 and second traction machine 1 (a), pass through the spring in regulating wheel 5
The extension and compression of device can buffer the asynchronous problem of elevator start and stop moment.When elevator no-load uplink or fully loaded downlink or
When car load is with range of balance to focusing on setting, elevator only needs to open simultaneously the first traction machine 1 and the second traction machine 1
(a) brake realizes car 3 with counterweight 4 in lifting hoistway and along this lifting rail by the first traction machine 1；Work as elevator
When empty down or fully loaded uplink or car load are with to focusing on outside the range of balance of setting, the first traction machine of elevator 1 and second
Traction machine 1 (a) drives simultaneously, to ensure that car 3 is worked normally with counterweight 4 in lifting hoistway and along this guide rail.
As shown in figure 4, one kind 4:1 suspension is than double host driven elevators, including the first traction machine 1, the second traction machine 1
(a), steel wire rope 2, regulating wheel 5, car 3, counterweight 4, car movable pulley 6, the second movable pulley 6 (a) of car, counterweight movable pulley 7, right
The second movable pulley 7 (a), car directive wheel 8, counterweight directive wheel 8 (a) are weighed, the first traction machine 1, the second traction machine 1 (a) are by draging
Draw machine base in elevator(lift) machine room or hoistway, 2 both ends of steel wire rope are separately fixed in elevator(lift) machine room or hoistway, steel wire rope 2
Sequentially pass through car movable pulley 6, car directive wheel 8, the second movable pulley 6 (a) of car, first traction machine 1, regulating wheel 5, second
A traction machine 1 (a), the second movable pulley 7 (a) of counterweight, counterweight directive wheel 8 (a), counterweight movable pulley 7, wherein car movable pulley 6 with
The second movable pulley 6 (a) of car is mounted on car 3, and car 3 is by steel wire rope 2 with 4:1 suspension ratio is suspended in lifting hoistway,
The second movable pulley 7 (a) of counterweight is mounted on counterweight movable pulley 7 on counterweight 4, and counterweight 4 is by steel wire rope 2 with 4:1 suspension is than suspension
In lifting hoistway, counterweight 4 is suspended on car 3 on the outside of two traction machines, car directive wheel 8 and counterweight directive wheel 8 (a) difference
In elevator(lift) machine room or hoistway.It is main driving traction machine to set the first traction machine 1, and the second traction machine 1 (a) is auxiliary drive
Traction machine, the installation and adjustment wheel 5 between first traction machine 1 and second traction machine 1 (a), the difference of 5 installation site of regulating wheel
The steel wire rope cornerite size that first traction machine 1 and second traction machine 1 (a) can be adjusted is filled by the spring in regulating wheel 5
The extension and compression set can buffer the asynchronous problem of elevator start and stop moment.When elevator no-load uplink or fully loaded downlink or sedan-chair
When compartment load is with range of balance to focusing on setting, elevator only needs to open simultaneously the first traction machine 1 and the second traction machine 1 (a)
Brake, realize car 3 and counterweight 4 in lifting hoistway and along this lifting rail by the first traction machine 1；Work as elevator no-load
When downlink or fully loaded uplink or car load are with to focusing on outside the range of balance of setting, elevator the first traction machine 1 and the second traction
Machine 1 (a) drives simultaneously, to ensure that car 3 is worked normally with counterweight 4 in lifting hoistway and along this guide rail.
As shown in figure 5, one kind 2:1 suspension three host driven elevators of ratio, including the first traction machine 1, the second traction machine 1
(a), third traction machine 1 (b), steel wire rope 2, regulating wheel 5, the second regulating wheel 5 (a), car 3, counterweight 4, car movable pulley 6, right
Weight movable pulley 7, the first traction machine 1, the second traction machine 1 (a), third traction machine 1 (b) are mounted on elevator by base of traction machine
In computer room or hoistway, 2 both ends of steel wire rope are separately fixed in elevator(lift) machine room or hoistway, and steel wire rope 2 sequentially passes through car movable pulley
6, first traction machine 1,5, second traction machines 1 (a) of regulating wheel, regulating wheel 5 (a), second traction machine 1 (b), counterweight are dynamic slides
Wheel 7,3 top of the car are equipped with car movable pulley 6, and car 3 is by steel wire rope 2 with 2:1 suspension ratio is suspended on lifting hoistway
Interior, 4 top of the counterweight is equipped with counterweight movable pulley 7, and counterweight 4 is by steel wire rope 2 with 2:1 suspension ratio is suspended on lifting hoistway
Interior, counterweight 4 is suspended on car 3 on the outside of two traction machines.It is main driving traction machine, the second traction machine 1 to set the first traction machine 1
(a), third traction machine 1 (b) is auxiliary driving traction machine, is installed between first traction machine 1 and second traction machine 1 (a)
Regulating wheel 5 installs the second regulating wheel 5 (a), regulating wheel installation position at second between traction machine 1 (a) and third traction machine 1 (b)
The steel wire rope cornerite size that the difference set can adjust traction machine can by the extension and compression of the spring assembly in regulating wheel
To buffer the asynchronous problem of elevator start and stop moment.When elevator no-load uplink or fully loaded downlink or car load are set with to focusing on
Range of balance when, elevator only needs to open simultaneously the brake of three traction machines, by the first traction machine 1 realize car 3 with
Counterweight 4 is in lifting hoistway and along this lifting rail；When elevator no-load downlink or fully loaded uplink or car load are set with to focusing on
When outside fixed range of balance, three traction machines of elevator drive simultaneously, to ensure car 3 with counterweight 4 in lifting hoistway and along this
Guide rail works normally.
As shown in fig. 6, one kind 2:Than the elevator of more host drivens, example is the elevator of n host driven for 1 suspension, wherein
N is natural number more than 3, including n traction machine, steel wire rope 2, regulating wheel, car 3, counterweight 4, car movable pulley 6, counterweight move
Pulley 7, each traction machine are mounted on by base of traction machine in elevator(lift) machine room or hoistway, and 2 both ends of steel wire rope are separately fixed at electricity
In terraced computer room or hoistway, steel wire rope 2 sequentially passes through 5, second 6, first traction machines 1 of car movable pulley, regulating wheel traction machines 1
(a), regulating wheel 5 (a), second traction machine 1 (b), regulating wheel 5 (n), n-th of traction machine 1 (n), counterweight movable pulley 7, the sedan-chair
3 top of compartment is equipped with car movable pulley 6, and car 3 is by steel wire rope 2 with 2:1 suspension ratio is suspended in lifting hoistway, the counterweight
4 tops are equipped with counterweight movable pulley 7, and counterweight 4 is by steel wire rope 2 with 2:1 suspension ratio is suspended in lifting hoistway, counterweight 4 and sedan-chair
Compartment 3 is suspended on the outside of multiple traction machines.It is main driving traction machine, the second traction machine 1 (a), third traction to set the first traction machine 1
Machine 1 (n) is auxiliary driving traction machine, and the difference of the installation and adjustment wheel between each traction machine, each regulating wheel installation site can
Steel wire rope cornerite size to adjust each traction machine can be buffered by the extension and compression of the spring assembly in regulating wheel
The asynchronous problem of elevator start and stop moment.When elevator no-load uplink or fully loaded downlink or car load and the balance to focusing on setting
When range, elevator only needs to open simultaneously the brake of all traction machines, realizes that car 3 exists with counterweight 4 by the first traction machine 1
It lifts in hoistway and along this lifting rail；When elevator no-load downlink or fully loaded uplink or car load and the balance to focusing on setting
When outside range, all traction machines of elevator drive simultaneously, to ensure that car 3 and counterweight 4 are normal in lifting hoistway and along this guide rail
Work.Elevator can set each traction machine job class and sequence according to load condition.
A kind of elevator of more host drivens provided by the utility model is solved single by Optimal improvements elevator driving structure
The application limitation problem of host driven elevator, keeps elevator cost lower, and more energy efficient, installation maintenance is easier, need computer room or
Hoistway space smaller also improves elevator safety reliability.
Claims (8)
1. a kind of elevator of more host drivens, including traction machine, steel wire rope, regulating wheel, car, counterweight, more host drivens
At least two or more traction machine of elevator, all traction machines are distributed between lift car and counterweight, the sedan-chair
Compartment can be run with a variety of suspensions than being suspended in elevator shaft with counterweight, and the multiple drive power of elevator may be implemented in more host drivens
With multistage brake.
2. elevator according to claim 1, which is characterized in that elevator includes two or more traction machine, institute
There is traction machine to be distributed between car and counterweight, car is with counterweight respectively in the both sides of traction machine.
3. elevator according to claim 1, which is characterized in that the regulating wheel is mounted between each traction machine, is adjusted
Wheel installation site can adjust the cornerite of traction machine steel wire rope, and the regulating wheel is equipped with spring assembly, between traction machine
Steel wire rope have tension, the instantaneous asynchrony phenomenon occurred between traction machine can be eliminated.
4. elevator according to claim 1, which is characterized in that the traction machine can be arranged to different Operation class
With operation order, main driving traction machine and auxiliary drive traction machine can be divided into, start traction machine as needed and reach more energy efficient
Effect.
5. elevator according to claim 1, which is characterized in that the traction machine is unified steel wire in series
Rope group provides driving force and speed, realizes multiple drive power and multistage brake.
6. elevator according to claim 1, which is characterized in that the traction machine is fixed on elevator machine by mounting seat
In room or hoistway, can meet has the kinds of schemes such as machine room elevator, machine-roomless lift.
7. elevator according to claim 1, which is characterized in that the car can be with a variety of suspensions than hanging with counterweight
It is run in elevator shaft, car is hung with counterweight than identical.
8. elevator according to claim 1, which is characterized in that the regulating wheel is used to be easier to grind relative to steel wire rope
The low material of damage, skin-friction coefficient, reduces the abrasion of steel wire rope, shields to steel wire rope, extends steel wire rope and uses the longevity
Life.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820000814.9U CN207861686U (en) | 2018-01-02 | 2018-01-02 | A kind of elevator of more host drivens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820000814.9U CN207861686U (en) | 2018-01-02 | 2018-01-02 | A kind of elevator of more host drivens |
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| Publication Number | Publication Date |
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| CN207861686U true CN207861686U (en) | 2018-09-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109987488A (en) * | 2018-01-02 | 2019-07-09 | 杭州菱智电梯科技有限公司 | A kind of elevator of more host drivens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109987488A (en) * | 2018-01-02 | 2019-07-09 | 杭州菱智电梯科技有限公司 | A kind of elevator of more host drivens |
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