CN207792397U - A kind of elevator emergent rescue mechanism - Google Patents
A kind of elevator emergent rescue mechanism Download PDFInfo
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- CN207792397U CN207792397U CN201721707870.8U CN201721707870U CN207792397U CN 207792397 U CN207792397 U CN 207792397U CN 201721707870 U CN201721707870 U CN 201721707870U CN 207792397 U CN207792397 U CN 207792397U
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- rescue
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- traction machine
- elevator
- traction
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Abstract
The utility model discloses a kind of elevator emergent rescue mechanisms, including traction machine tripper, when traction machine powers off, traction machine tripper action, to make braking of the electromagnetic braking mechanism releases of traction machine to traction machine by drawstring；Worm gear, it is coaxially connected with traction sheave；The worm screw being meshed with worm gear, to constitute the lockable mechanism of traction sheave；Rescue system, including the driving element that worm screw rotates, the stand-by power supply powered for driving element can be driven, when elevator normal operation, rescue system keeps the rotating ratio of worm and wheel synchronous with the holding of the transmission ratio of worm and wheel；When needing rescue, rescue system makes worm screw rotate by stand-by power supply, to be rotated by worm-gear driven traction sheave, makes car flat bed nearby, to realize the self-service rescue of passenger.The utility model can realize the self-service rescue of passenger, can not only be effectively reduced the maintenance cost of rescue system, but also can greatly improve safety of the elevator when the abnormal conditions such as occurring having a power failure.
Description
Technical field
The utility model is related to technical field of elevator manufacturing, more particularly, to a kind of elevator emergency of achievable passenger self-rescue
Rescue facility.
Background technology
In skyscraper, elevator is a kind of corollary equipment of indispensability, can be brought great convenience to occupant.Mesh
Before, with the development of economy, middle high-income group largely occurs, and the demand of villa is also being continuously increased, and correspondingly, is suitable for
The home lift of villa class building also begins to prevalence.Elevator includes mainly hoistway, a sedan-chair being liftably arranged in hoistway
Compartment, the driving mechanism to drive car to lift, currently, driving mechanism is traction-type driving mechanism mostly comprising one sets
The traction machine in well headroom is set, traction machine connects traction sheave, and hoist ropes is arranged on traction sheave, and one end of hoist ropes connects sedan-chair
Compartment, the other end connects a counterweight that can be lifted in hoistway, to balance the weight of car, to reduce the negative of traction machine
It carries.When the forward and reverse rotation of traction machine driving traction sheave, the hoist ropes of winding on the traction sheave moves back and forth, to realize car
Lifting, and counterweight is then reversely lifted with car.
Due to traction sheave by frictional force drives hoist ropes move, after elevator is used for a long time, hoist ropes with
It easy tos produce slipping phenomenon or control system between traction sheave to fail to the control of traction machine, so as to cause the quick of car
It rushes to summit or crouching bottom, less serious case leads to the impaired of passenger's body and elevator, serious to result even in passenger's death.For this purpose, people set
The various device and method that car safety when elevator is run can be improved are counted, wherein most important mode is set on traction machine
Set an electromagnetic braking mechanism.When elevator power failure or because elevator failure control system cut off elevator power supply when, electromagnetism
Electromagnet dead electricity in arrestment mechanism and lose electromagnetic attraction, the mechanism of electromagnetic braking at this time is dynamic by the active force of tripping spring
Make, you can locking braking is realized to traction machine；And elevator is when having electricity, the electromagnet in electromagnetic braking mechanism obtain it is electric, to overcome
The elastic force of tripping spring makes locking of the electromagnetic braking mechanism releases to traction machine, elevator can normal operation.
After traction machine or car are braked locking, the passenger in car needs to alarm by tools such as phone, intercoms
It seeks help, then carries out external rescue by special maintenance personnel.Specifically, maintenance personnel needs to be introduced into the top of hoistway artificially
Braking of the arrestment mechanism to traction machine is released, then so that car is risen or fallen with corresponding barring gear, to realize nearby
Flat bed.
However there are following defects for the braking of above-mentioned elevator and rescue mode：Firstly, since passenger needs outside
Maintenance personnel rescues, and therefore, the time of rescue is long, can cause greatly at heart to fear to the passenger in enclosed environment
Unbearably.At this point, passenger easily occurs to push aside gate escape by force or from hazardous acts such as car top escapes.Secondly, work as maintenance
When personnel release the braking to traction machine, car can be lifted voluntarily in runaway condition in a short time, therefore, maintenance personnel
Barring gear and traction sheave must be first connected, the braking to traction machine is then released.That is, rescue must be by 24 one hour values
Class professional by profession equipment carry out, to cause routine use, maintenance cost it is surging.And once safeguard people
The operation sequence of member is made a fault, and extremely serious safety accident will be caused.
Utility model content
It the braking when having a power failure or being abnormal situation that purpose of the utility model is to solve existing elevators and rescues
Help the rescue present in mode not in time, the regular maintenance cost of rescue system is high, there are problems that security risk, one kind is provided
Elevator emergent rescue mechanism can realize the self-service rescue of passenger, you can be effectively reduced in system blackout or failure
The maintenance cost of rescue system, and safety of the elevator when the abnormal conditions such as occurring having a power failure can be greatlyd improve.
To achieve the goals above, the utility model uses following technical scheme：
A kind of elevator emergent rescue mechanism, including：
Traction machine tripper is arranged on the mounting platform of well headroom, when traction machine powers off, traction machine unlock
Device action, to make braking of the electromagnetic braking mechanism releases of traction machine to traction machine；
Worm gear mechanism, worm gear therein and the traction sheave driven by traction machine are coaxially connected；
Rescue system, including the driving element that worm screw rotates, the stand-by power supply powered for driving element can be driven, work as elevator
When normal operation, rescue system keeps the rotating ratio of worm and wheel synchronous with the holding of the transmission ratio of worm and wheel；It needs to rescue
When, rescue system makes worm screw rotate by stand-by power supply, to be rotated by worm-gear driven traction sheave, makes car flat bed nearby,
To realize the self-service rescue of passenger.
The rescue system of the utility model includes traction machine tripper, driving element and powers for driving element standby
With power supply, in this way, when needing rescue, elevator is in off-position, and the electromagnet of the electromagnetic braking mechanism of traction machine loses at this time
Electricity and lose suction, braking to traction machine is realized in driving spring action.At the same time, traction machine tripper acts, i.e.,
Electromagnetic braking mechanism action can be driven by drawstring, to release the braking to traction machine.It is understood that traction machine unlock dress
It can also be an electromagnet with spring to set, and the elastic force of its spring is greater than in traction machine electromagnetic braking mechanism and drives
The elastic force of spring.In this way, in elevator normal operation, the electromagnet in traction machine electromagnetic braking mechanism and traction machine tripper
In the state that is powered on, correspondingly, traction machine releases locking and is in normal operation, and drawstring at this time is then in just
The state of tension.When needing rescue, the electromagnet dead electricity in traction machine tripper, spring works, and is drawn to pass through
It restricts and a pulling force is applied to the driving spring in the electromagnetic braking mechanism of traction machine, make driving spring that can not act, to make electricity
Magnetic brake mechanism remains the state for releasing locking.
Passenger can directly press the button for starting driving element in car at this time, to keep driving first by stand-by power supply
Part works, and then drives traction sheave rotation by worm gear mechanism, to realize the flat bed nearby of car.It should be noted that
Worm gear mechanism is arranged in the utility model between driving element and traction sheave, in this way, when needing rescue, worm and gear machine
Structure can be used as reduction gearing mechanism, to be conducive to increase the torque of driving element driving traction sheave.That is, a small work(
The driving element of rate can be driven car with slower rescue speed flat bed nearby, to reduce the requirement to stand-by power supply, with
Advantageously reduce cost.In particular, when elevator powers off, only driving element can drive traction sheave to rotate, and traction sheave can not
Reversed dragging driving element action, worm gear mechanism can be used as the reliable self-locking mechanism of traction sheave, can with realize traction sheave
By self-locking, the car caused by the voluntarily fast lifting of car is avoided to rush to summit or the security risks such as crouching bottom.Therefore, the utility model
Can realize the automatic unlocking of traction machine electromagnetic braking mechanism by the way that traction machine tripper is arranged, at the same ensure car can
By locking.
In elevator normal operation, we can make driving element and traction machine be kept for appropriate turn by corresponding controller
Speed ratio, to enable worm and worm wheel to keep operating synchronously, worm screw at this time is driven by driving element and is independently rotated, and worm gear is then
It is rotated by traction wheel drive, that is to say, that in the most of the time of elevator normal operation, driving element is all in unloaded shape
State can be effectively prevented from the waste of electric energy.
Preferably, the traction machine tripper includes a self-replaced type electromagnet with resetting spring, it is described
The iron core of traction machine tripper is connected with one end of a drawstring, the electromagnetic braking dress of the other end connection traction machine of drawstring
It sets, when needing rescue, traction machine tripper power-off, resetting spring driving plunger return makes traction to drive drawstring to act
Braking of the electromagnetic braking mechanism releases of machine to traction machine.
Self-replaced type electromagnet structure is simply at low cost, it is convenient to realize traction machine tripper and traction machine electromagnetic system
The synchronization action of motivation structure, to realize the automatic unlocking of traction machine electromagnetic braking mechanism.
Preferably, the driving element includes a rescue motor being connect with worm screw, rescue system further includes servo
Controller, when elevator normal operation, servo controller controls traction machine and rescue respectively according to the transmission ratio of worm and wheel
The rotating speed of motor makes worm and wheel keep synchronizing；When needing rescue, rescue motor is rotated by worm screw, worm-gear driven traction
It is dynamic, to make car to rescue that speed is mobile flat bed nearby, the rescue speed and setting speed when car normal operation it
Than 1/6th between a quarter.
In the present solution, rescue motor plays the role of two simultaneously, on the one hand, rescue motor abnormal feelings can occur in elevator
Traction sheave is driven by stand-by power supply when condition, to realize the flat bed nearby of car, on the other hand, the utility model passes through servo control
Device processed accurately controls traction machine and rescues the rotating speed of motor, makes worm and wheel keep synchronizing, to avoid elevator normal operation
When worm screw interfere caused by worm gear, it is ensured that the normal operation of traction sheave.In particular, rescue motor passes through worm screw, the biography of worm gear
It is dynamic, can be with a lower rescue speed driving car movement, thus the power of rescue motor can be greatly reduced, be conducive to drop
The cost of low rescue system.
Preferably, the driving element includes the rescue motor for being connected to worm screw one end, is connected to the worm screw other end
Motor is protected, rescue system further includes servo controller, and when elevator normal operation, servo controller is according to worm and wheel
Transmission ratio controls traction machine and protects the rotating speed of motor respectively, and worm and wheel is made to keep synchronizing；When needing rescue, motor is rescued
It is rotated by worm screw, worm-gear driven traction sheave, to make car to rescue speed movement and nearby flat bed, the rescue speed and sedan-chair
The ratio between setting speed when the normal operation of compartment is 1/6th between a quarter.
Unlike aforementioned schemes, a rescue motor and a protection motor is respectively set at worm screw end in this programme,
Protection motor therein is used to that worm and worm wheel holding to be made to operate synchronously when elevator normal operation, and rescues motor and be then used for elevator
There is passenger self-rescue when abnormal conditions.In this way, when abnormal conditions occurs in elevator, either traction machine still protects motor to go out
Existing failure, system can cut off traction machine and protect the power supply of motor simultaneously, to first ensure that the safety of elevator, while be conducive to letter
Switching when changing passenger self-rescue between alternating current and stand-by power supply.
Preferably, the stand-by power supply is accumulator.Use accumulator that can simplify rescue program as stand-by power supply.
Preferably, the stand-by power supply is man-power generator, the man-power generator includes one and is arranged in car
Manpower driving element, when elevator powers off, the passenger in car can make the rotor of man-power generator by manpower driving element
Rotation power generation to drive rescue motor rotation, and then drives traction sheave rotation by worm screw, worm gear.
Man-power generator can avoid the appearance of situations such as self discharge damage for making accumulator easy to produce because long-time is idle,
Ensure the effective always of passenger self-rescue.Certainly, it would be desirable to corresponding regulating device be set, electric power caused by generating electricity from manpower is made
It can driving motor normal work.
Therefore, the utility model has the advantages that：Oneself of passenger can be realized in system blackout or failure
Help formula to rescue, can not only be effectively reduced the maintenance cost of rescue system, but can greatly improve elevator occur having a power failure etc. it is abnormal
Safety when situation.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of the utility model.
In figure：1, traction machine 11, electromagnetic braking mechanism 2, traction machine tripper 3, worm gear mechanism 4, traction
Wheel 5, rescue system 51, rescue motor 52, protection motor 6, mounting platform.
Specific implementation mode
The utility model is further described with specific implementation mode below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of elevator emergent rescue mechanism, occur having a power failure it is suitable for the elevator driven in traction machine or different
The self-service rescue of passenger drives electromagnetism there are one the tools of traction machine 1 of car as the standard configuration of elevator in car when reason condition
Arrestment mechanism 11.The electromagnetic braking mechanism includes the driving spring and electromagnet that braking member is connected with braking member, is being needed
When braking traction machine, electromagnetic braking mechanism powers off, and electromagnet loses electromagnetic attraction at this time, and driving spring drives braking member dynamic
Make, to realize the braking to traction machine, to ensure the safety of elevator.And when elevator normal operation, the electricity of electromagnetic braking mechanism
Magnet obtains electric and generates electromagnetic attraction, so that braking member is released the braking to traction machine to overcome the elastic force of driving spring.
Specifically, elevator emergent rescue mechanism includes a traction machine solution being arranged on the mounting platform 6 of well headroom
Locking device 2, the worm gear mechanism 3 being made of intermeshing worm gear, worm screw and a rescue system 5, worm and gear machine
One end of worm gear and traction sheave 4 in structure is coaxially connected, and the other end of traction sheave is connect with traction machine, and traction machine tripper can
The braking to traction machine is automatically terminated in passenger self-rescue.Rescue system includes the driving element that worm screw can be driven to rotate and is
The stand-by power supply of driving element power supply.When elevator normal operation, rescue system make the rotating ratio of worm and wheel and worm screw with
The transmission ratio of worm gear keeps synchronizing, and is rotated to enable worm and worm wheel mutually to keep independent without interfering, this
When worm tooth and the tooth socket of worm gear between tool there are one small gap, driving element is then in light condition.When elevator stops
Electricity or when abnormal conditions occur and cutting off the power supply of traction machine, first passes through traction machine tripper and releases electromagnetic braking mechanism
Braking to traction machine relies on the self-locking of worm and gear, traction sheave that can not be rotated by worm gear reverse drive worm screw at this time,
To make traction sheave be in reliable self-locking state.That is, the worm and worm wheel in the utility model constitute elevator power failure
Or traction sheave lockable mechanism when breaking down.Then the passenger in car can by corresponding button or switch make elevator into
Enter self-saving model, the driving element in traction machine tripper is powered by stand-by power supply and started, to pass through worm and gear
Mechanism drives traction sheave rotation, to realize that the flat bed nearby of car, passenger can open sedan-chair by the mechanism that opens Door by Hand accordingly
Door and layer door, to complete the self-service rescue of passenger.Due to gate layer door open Door by Hand mechanism be elevator standard configuration,
This does not make excessive description.
It should be noted that the driving element in rescue system includes a rescue motor 51 for being connected to worm screw one end.
In order to accurately control rotating speed, it is servo motor to rescue motor and traction machine, and rescue system also needs setting one for controlling
The servo controller of system rescue motor and traction machine rotating speed.When elevator normal operation, servo controller is according to worm and wheel
Transmission ratio control respectively traction machine and rescue motor rotating speed, make worm and wheel keep synchronize；When needing rescue, standby electricity
Source power supply makes rescue electric motor starting, to drive traction sheave rotation by worm gear mechanism, makes car to rescue speed movement
And flat bed nearby.We can make the rescue speed and car of car conveniently by the transmission ratio of reasonable design worm and wormwheel
The ratio between setting speed when normal operation is maintained at 1/6th between a quarter, and preferred value is 1/5th.In this way,
The power that rescue motor can be greatly reduced, advantageously reduces the cost of rescue system.
As an alternative, the driving element in the rescue system of the utility model, which may also comprise, is connected to worm screw one
The rescue motor 51 at end, the protection motor 52 for being connected to the worm screw other end, it is servo motor to protect motor and traction machine, and
Rescue system also needs servo controller of the setting one for controlling protection motor and traction machine rotating speed.When elevator normal operation
When, servo controller controls traction machine according to the transmission ratio of worm and wheel and protects the rotating speed of motor respectively, makes worm screw and snail
Wheel keeps synchronizing；When needing rescue, stand-by power supply power supply makes rescue electric motor starting, to drive traction by worm gear mechanism
Wheel rotation makes car to rescue speed movement and nearby flat bed.Similarly, we can be conveniently by reasonable design worm screw snail
The transmission ratio of wheel makes the rescue speed of car be maintained at 1 to four/6th point with the ratio between setting speed when car normal operation
One of between, preferred value be 1/5th.In this way, the power of rescue motor can be greatly reduced, rescue system is advantageously reduced
The cost of system.
Unlike aforementioned schemes, a rescue motor and a protection electricity is respectively set in worm end in this programme
Machine, protection motor therein is used to that worm and worm wheel holding to be made to operate synchronously when elevator normal operation, and rescues motor and be then used for
There is passenger self-rescue when abnormal conditions in elevator.In this way, when abnormal conditions occurs in elevator, either traction machine still protects electricity
Machine breaks down, and system can cut off traction machine and protect the power supply of motor simultaneously, to stop the lifting of car, to first ensure that
The safety of elevator, and stand-by power supply can directly be connected with rescue motor, when rescue, need to only open stand-by power supply and rescue motor
Between switch can start rescue motor, without carrying out the switching between alternating current and stand-by power supply to rescue motor.
Further, stand-by power supply can be setting rechargeable storage battery on mounting platform, to need
Easily start rescue motor by accumulator when saving oneself.Since accumulator is easy to lose because of the electric discharge of itself after long-term leave unused
Effect, therefore, the stand-by power supply of the utility model can also be a man-power generator, and man-power generator includes generator unit and one
A manpower driving element being arranged in car, it is preferable that generator unit may be provided at car top.In this way, when elevator powers off
When, the passenger in car can generate electricity by manpower driving element make the generator unit of man-power generator work, and be rescued to drive
Motor rotation is helped, and then traction sheave rotation is driven by worm screw, worm gear.Since man-power generator is a kind of prior art, herein
Excessive description is not done.And manpower driving element can be one and rotatable crank is arranged on car side wall, in crank axle
The transmission mechanism of belt transmission or chain drive one kind is set between generator unit.When passenger's rotating crank, you can pass through biography
Motivation structure drives generator unit work and generates electricity.Certainly, it would be desirable to corresponding regulating device be set, made produced by generating electricity from manpower
Electric power can drive rescue motor normal work.
Finally, the traction machine tripper of the utility model includes a self-replaced type electromagnet with resetting spring,
The iron core of the self-replaced type electromagnet is connected with one end of drawstring, and the other end of drawstring then connects the electromagnetic braking dress of traction machine
Braking member in setting.In this way, in elevator normal operation, the self-replaced type electromagnet work once electrified of traction machine tripper,
To overcome the elastic force of resetting spring to make resetting spring accumulation of energy.When needing rescue, electromagnetic braking mechanism is in off-position, at this time
The driving spring of electromagnetic braking mechanism works, and driving braking member action makes traction machine be in on-position, while pulling
Rope, makes drawstring just at tensioning state.At the same time, the self-replaced type electromagnet of traction machine tripper powers off and loses electricity
Magnetic attraction, resetting spring can be driven the plunger return of self-replaced type electromagnet, to drive drawstring to act, make the electricity of traction machine
Braking member direction in magnetic brake mechanism acts and releases the braking to traction machine.It should be noted that traction machine unlock dress
The elastic force of resetting spring in setting should be greater than the elastic force of the driving spring of electromagnetic braking mechanism, so that it is guaranteed that traction machine tripper
Braking of the electromagnetic braking mechanism to traction machine can be released.When entire elevator device has a power failure, traction machine, electromagnetic braking mechanism
And traction machine tripper powers off simultaneously, the resetting spring in traction machine tripper acts and is tensioned drawstring at this time, due to
The elastic force of the driving spring of electromagnetic braking mechanism is less than the elastic force of resetting spring, and therefore, driving spring can not act and continue
Keep energy accumulating state.When the control system of elevator detects that abnormal conditions occurs in elevator and cuts off traction machine, electromagnetic braking mechanism
Power supply when, the control system of elevator can directly cut off the power supply of traction machine tripper, or can be arranged in car corresponding
Control switch, need the passenger to save oneself can first pass through control switch cutoff traction machine tripper power supply, easily to solve
Except the braking to traction machine.
Claims (6)
1. a kind of elevator emergent rescue mechanism, characterized in that including：
Traction machine tripper is arranged on the mounting platform of well headroom, when traction machine powers off, traction machine tripper
Action, to make braking of the electromagnetic braking mechanism releases of traction machine to traction machine；
Worm gear mechanism, worm gear therein and the traction sheave driven by traction machine are coaxially connected；
Rescue system, including the driving element that worm screw rotates, the stand-by power supply powered for driving element can be driven, when elevator is normal
When operation, rescue system keeps the rotating ratio of worm and wheel synchronous with the holding of the transmission ratio of worm and wheel；When needing rescue, rescue
Help system makes worm screw rotate by stand-by power supply, to be rotated by worm-gear driven traction sheave, makes car flat bed nearby, to real
The self-service rescue of existing passenger.
2. a kind of elevator emergent rescue mechanism according to claim 1, characterized in that the traction machine tripper includes
One self-replaced type electromagnet with resetting spring, the iron core of the traction machine tripper are connected with one end of a drawstring
It connects, the electro-magnetic braking device of the other end connection traction machine of drawstring, when needing rescue, the power-off of traction machine tripper resets bullet
Spring driving plunger return makes braking of the electromagnetic braking mechanism releases of traction machine to traction machine to drive drawstring to act.
3. a kind of elevator emergent rescue mechanism according to claim 1, characterized in that the driving element include one with
The rescue motor of worm screw connection, rescue system further includes servo controller, and when elevator normal operation, servo controller is according to snail
The transmission ratio of worm and wheel controls traction machine and rescues the rotating speed of motor respectively, and worm and wheel is made to keep synchronizing；It needs to rescue
When, rescue motor is rotated by worm screw, worm-gear driven traction sheave, to make car to rescue speed movement and nearby flat bed, is somebody's turn to do
The ratio between setting speed when rescue speed and car normal operation is 1/6th between a quarter.
4. a kind of elevator emergent rescue mechanism according to claim 1, characterized in that the driving element includes being connected to
The rescue motor of worm screw one end, the protection motor for being connected to the worm screw other end, rescue system further includes servo controller, works as elevator
When normal operation, servo controller controls traction machine according to the transmission ratio of worm and wheel and protects the rotating speed of motor respectively, makes
Worm and wheel keeps synchronizing；When needing rescue, rescue motor is rotated by worm screw, worm-gear driven traction sheave, to make car
The flat bed nearby to rescue that speed is mobile, the ratio between the rescue speed and setting speed when car normal operation 1/6th to
Between a quarter.
5. a kind of elevator emergent rescue mechanism according to claim 1, characterized in that the stand-by power supply is accumulator.
6. a kind of elevator emergent rescue mechanism according to claim 1, characterized in that the stand-by power supply is generating electricity from manpower
Machine, the man-power generator includes a manpower driving element being arranged in car, when elevator powers off, the passenger in car
The rotor of man-power generator can be made to rotate power generation by manpower driving element, to drive rescue motor rotation, and then pass through snail
Bar, worm gear drive traction sheave rotation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721707870.8U CN207792397U (en) | 2017-12-08 | 2017-12-08 | A kind of elevator emergent rescue mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721707870.8U CN207792397U (en) | 2017-12-08 | 2017-12-08 | A kind of elevator emergent rescue mechanism |
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| Publication Number | Publication Date |
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| CN207792397U true CN207792397U (en) | 2018-08-31 |
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| CN201721707870.8U Expired - Fee Related CN207792397U (en) | 2017-12-08 | 2017-12-08 | A kind of elevator emergent rescue mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109665401A (en) * | 2017-10-17 | 2019-04-23 | 陕西小溪机电科技有限公司 | A kind of elevator emergent rescue mechanism |
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2017
- 2017-12-08 CN CN201721707870.8U patent/CN207792397U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109665401A (en) * | 2017-10-17 | 2019-04-23 | 陕西小溪机电科技有限公司 | A kind of elevator emergent rescue mechanism |
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Granted publication date: 20180831 Termination date: 20211208 |