CN106429698A - Over-speed protection device for elevator - Google Patents
Over-speed protection device for elevator Download PDFInfo
- Publication number
- CN106429698A CN106429698A CN201610954094.5A CN201610954094A CN106429698A CN 106429698 A CN106429698 A CN 106429698A CN 201610954094 A CN201610954094 A CN 201610954094A CN 106429698 A CN106429698 A CN 106429698A
- Authority
- CN
- China
- Prior art keywords
- block
- brake
- brake block
- elevator
- voussoir
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/044—Mechanical overspeed governors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
- B66B5/22—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces by means of linearly-movable wedges
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses an over-speed protection device for an elevator. The over-speed protection device comprises two over-speed protection sub-devices symmetrically arranged on two sides outside a car of the elevator; each over-speed protection sub-device comprises an over-speed brake mechanism, a safety gear mechanism and a micro-switch electrically connected with an elevator safety circuit; each over-speed brake mechanism comprises a chassis, a speed limiting wheel, a brake disc and two flail blocks; each safety gear mechanism comprises a steel brake rope, a wedge block and a brake block, one end of the steel brake rope is connected with the brake disc, the other end of the steel brake rope is connected with the brake block, and the brake block can move and get close to a guide rail of the car of the elevator under the effects of the steel brake rope and the wedge block; and each micro-switch is arranged on the surface where the wedge block makes contact with the brake block.
Description
Technical field
The present invention relates to elevator technology field, particularly a kind of elevator overspeed protecting device.
Background technology
Elevator is a kind of vertical conveyor with motor as power, equipped with box like gondola, for tier building take advantage of people or
Carrying goods.Elevator, as the transport facility of vertical direction, has become as important building in skyscraper and public place
Build equipment and indispensable.With the development of computer technology, automatic technology and Power Electronic Technique, modem elevator has become
For typical electromechanical integrated product.With the raising of overall national economy strength, the life consumption level of the people rises appreciably,
Real estate developer releases medium-to-high grade little high-rise and high-rise residential building one after another energetically, has driven increasing rapidly of residential lift,
Become the main growth factor in whole elevator market.
Existing elevator, its limiter of speed and safety tongs are separate, and limiter of speed is installed on machine room, and safety tongs is installed on sedan-chair
Frame in addition it is also necessary to install over-speed governor tensioning apparatus in pit, by speed limiter wire rope by limiter of speed, safety tongs and limiter of speed tensioning
Device links together.Due to floor too high when, speed limiter wire rope is long and installation difficulty and limiter of speed steel wire easily
The lax phenomenon of rope, fault rate is higher, manufactures and installation cost is higher, repair and maintenance are also relatively difficult.
Content of the invention
Present invention aims to the deficiencies in the prior art and a kind of elevator overspeed protecting device is provided, can significantly drop
Less trouble, reduces manufacturing and installation cost is so that repair and maintenance and being easily installed.
The technical scheme is that：A kind of elevator overspeed protecting device, including being symmetricly set in the outer both sides of lift car
Two overspeed protection sub-devices, described overspeed protection sub-device includes automatic brake mechanism, safe jaw mechanism and and elevator
The microswitch of safety return circuit electrical connection；Described automatic brake mechanism includes underframe, speed limited wheel, brake disc and two and gets rid of block,
The axis vertical with the guide rail of lift car is provided with described underframe, described speed limited wheel and brake disc are rotatably arranged
On axis, and the guide rail contact of this speed limited wheel periphery and lift car, described speed limited wheel is near the side of brake disc with it
The center of circle is symmetrically arranged with two bearing pins, and block is eccentric respectively is arranged on two bearing pins for getting rid of described in two, and described in two
Get rid of block to be centrosymmetric setting with the center of circle of speed limited wheel, the described block that gets rid of is provided with ratchet away from one end of its corresponding bearing pin, its
In one get rid of block and be connected with speed limited wheel by extension spring away from one end of bearing pin, and this gets rid of block and passes through connecting rod near one end of bearing pin
Get rid of block with another to be flexibly connected away from one end of bearing pin, described brake disc is provided with and the groove getting rid of block phase wedging and spine
Tooth；Described safe jaw mechanism includes braking steel cable, voussoir and brake block, one end of described braking steel cable and described brake disc
Connect, the other end of this braking steel cable is connected with brake block, described brake block is removable in the presence of braking steel cable and voussoir
The guide rail of dynamic and close lift car；Described microswitch is arranged at the contact surface of voussoir and brake block.
Speed limited wheel and guide rail contact, when elevator is static, speed limited wheel does not rotate, get rid of block keep in the presence of extension spring in
The position that the heart tightens；When elevator declines, guide rail can drive speed limited wheel to rotate, when lift car decrease speed is normal, centrifugation
Power makes to get rid of block and swings out around bearing pin and keep balance with the elastic force of extension spring, and the space between ratchet and ratchet reduces；Work as elevator
When car reaches the speed that overspeed protective device sets, under the influence of centrifugal force, get rid of block and swing out around bearing pin and exceed and draw
Elastic force constraint, ratchet and the ratchet engagement of spring, gets rid of block and drives disc rotation, and brake disc drives braking steel cable again, by brake block
Pull-up, brake block will touch microswitch thus disconnecting the safety return circuit of elevator in the presence of braking steel wire and voussoir, makes electricity
Terraced main frame is out of service, and reaches, near guide rail and by the frictional force between guide rail, the purpose slowed down to lift car.
Automatic brake mechanism and safe jaw mechanism are integrated by the present invention, can substantially reduce fault rate, reduce manufacture and
Installation cost so that repair and maintenance and being easily installed, solves speed limiter wire rope in prior art long and easily occur installing
The phenomenon that difficult and speed limiter wire rope relaxes, thus causing trouble rate is higher, manufactures and installation cost is higher, repair and maintenance also compare
Difficult the problems such as.
Preferably, this elevator overspeed protecting device includes multipair overspeed protection being arranged at elevator car roof and bottom
Device.
Lift car can be made more to balance in overspeed protection by becoming symmetrically arranged overspeed protection sub-device, protect car
The security of the lives and property of interior passenger.
Preferably, described brake disc is arranged on described axis by unilateral bearing.
Connect brake disc and axis using unilateral bearing so that brake disc can only rotate under the drive getting rid of block, and cannot
Revolution, during preventing overspeed protection, brake disc is turned round so that brake block drops loses the effect of clamping down on.
Preferably, described voussoir and brake block may be contained within underframe and be located at the lower section of brake disc, described voussoir
It is right-angled trapezium shape with brake block；Described voussoir is wide at the top and narrow at the bottom, and the hypotenuse of this voussoir is near brake block；Described brake block
Up-narrow and down-wide, the hypotenuse of this brake block is near voussoir；The height of described voussoir is more than the height of brake block, described microswitch
It is arranged at the contact surface of voussoir and brake block, and this microswitch is higher than brake block.
The safety tongs mechanism structure of this structure is simple, and cooperation is accurate, before ensureing safety tongs protection good protection function
Put cost-effective further.
Preferably, one end that described braking steel cable connects described brake block is provided with hook, and described braking steel cable passes through
This hook is connected with brake block.
It is only necessary to hook is taken off from brake block after elevator overspeed protecting device carries out overspeed protection, then will make
Moving plate rotates again to hang over hook after making the reset of braking steel cable and is ready for overspeed protection next time on brake block, and reset operation
Simple and convenient, reusable.
Preferably, the periphery of described speed limited wheel is provided with skid resistant course.
When elevator declines, skid resistant course can ensure that guide rail can accurately drive speed limited wheel to rotate, it is to avoid during elevator overspeed, speed limited wheel
Elevator overspeed cannot be correctly detecting, also can reduce the abrasion of speed limited wheel simultaneously, increase the service life.
Preferably, described brake block and the one side of the guide rail contact of lift car are provided with damping friction layer.
Damping friction layer can provide bigger frictional force when elevator overspeed is more, can be in elevator overspeed quickly to elevator
Slowed down, also can reduce the abrasion of brake block it is ensured that elevator overspeed protecting device normally runs simultaneously, increase the service life.
Preferably, described brake block is contacted with the guide rail of lift car and speed limited wheel under the pulling of braking steel cable respectively,
The one side that described brake block is contacted with speed limited wheel is provided with damping friction layer.
When elevator overspeed, the brake block being pulled up is when being slowed down with guide rail contact moreover it is possible to contact anti-with speed limited wheel
Only speed limited wheel is rotated further, and makes the rolling friction between speed limited wheel and guide rail be changed into sliding friction, increases frictional force further, from
And make slowing effect more notable.
The invention has the beneficial effects as follows：
1st, automatic brake mechanism and safe jaw mechanism are integrated, fault rate can be substantially reduced, reduce and manufacture and install
Cost so that repair and maintenance and being easily installed, solves speed limiter wire rope in prior art long and installation difficulty easily
The phenomenon relaxing with speed limiter wire rope, thus causing trouble rate is higher, manufactures and installation cost is higher, repair and maintenance are also relatively difficult
The problems such as.；
2nd, lift car can be made more to balance in overspeed protection by becoming symmetrically arranged overspeed protection sub-device, protect sedan-chair
The security of the lives and property of passenger in railway carriage or compartment；
3rd, brake disc and axis are connected so that brake disc can only rotate under the drive getting rid of block using unilateral bearing, and no
Method is turned round, and during preventing overspeed protection, brake disc is turned round so that brake block drops loses the effect of clamping down on；
4th, safety tongs mechanism structure is simple, and cooperation is accurate, enters on the premise of ensureing safety tongs protection good protection function
One step is cost-effective；
5th, it is only necessary to hook is taken off from brake block after elevator overspeed protecting device carries out overspeed protection, then will
Disc rotation makes braking steel cable again hang over hook after resetting and is ready for overspeed protection next time on brake block, and reset behaviour
Make simple and convenient, reusable；
6th, when elevator declines, skid resistant course can ensure that guide rail can accurately drive speed limited wheel to rotate, it is to avoid during elevator overspeed, speed limit
Wheel cannot be correctly detecting elevator overspeed, also can reduce the abrasion of speed limited wheel simultaneously, increase the service life；
7th, damping friction layer can provide bigger frictional force when elevator overspeed is more, can be in elevator overspeed quickly to electricity
Ladder is slowed down, and also can reduce the abrasion of brake block it is ensured that elevator overspeed protecting device normally runs simultaneously, extends and uses the longevity
Life；
8th, when elevator overspeed, the brake block being pulled up is when being slowed down with guide rail contact moreover it is possible to contact with speed limited wheel
Prevent speed limited wheel to be rotated further, make the rolling friction between speed limited wheel and guide rail be changed into sliding friction, increase frictional force further,
So that slowing effect is more notable.
Brief description
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is the internal structure schematic diagram of underframe in the embodiment of the present invention；
Fig. 3 is the structural representation near brake disc side for the speed limited wheel in the embodiment of the present invention；
Fig. 4 is the structural representation near speed limited wheel side for the brake disc in the embodiment of the present invention；
Reference：100- overspeed protection sub-device, 200- automatic brake mechanism, 210- underframe, 220- axis, 230- limits
Speed wheel, 240- bearing pin, 250- gets rid of block, 251- ratchet, 260- connecting rod, 270- extension spring, 280- brake disc, 281- ratchet, 300-
Safe jaw mechanism, 310- brakes steel cable, 320- voussoir, 330- brake block, 400- microswitch, 500- lift car, and 600- leads
Rail.
Specific embodiment
Below in conjunction with the accompanying drawings embodiments of the invention are described in detail.
Embodiment
As Figure 1-4, a kind of elevator overspeed protecting device, including being symmetricly set in the two of the outer both sides of lift car 500
Individual overspeed protection sub-device 100, described overspeed protection sub-device 100 includes automatic brake mechanism 200, safe jaw mechanism 300
And the microswitch 400 electrically connecting with elevator safety loop；Described automatic brake mechanism 200 includes underframe 210, speed limited wheel
230th, brake disc 280 and two get rid of block 250, described underframe 210 are provided with vertical with the guide rail 600 of lift car 500
Axis 220, described speed limited wheel 230 and brake disc 280 are rotatably arranged on axis 220, and this speed limited wheel 230 periphery
Contact with the guide rail 600 of lift car 500, described speed limited wheel 230 is symmetrically arranged with its center of circle near the side of brake disc 280
Two bearing pins 240, block 250 is eccentric respectively is arranged on two bearing pins 240 for getting rid of described in two, and gets rid of block described in two
250 are centrosymmetric setting with the center of circle of speed limited wheel 230, and the described block 250 that gets rid of is provided with away from one end of its corresponding bearing pin 240
Ratchet 251, one of them is got rid of block 250 and is connected with speed limited wheel 230 by extension spring 270 away from one end of bearing pin 240, and this gets rid of block
250 get rid of block 250 by connecting rod 260 with another near one end of bearing pin 240 is flexibly connected away from one end of bearing pin 240, institute
State and be provided with brake disc 280 and the groove getting rid of block 250 phase wedging and ratchet 281；Described safe jaw mechanism 300 includes braking
Steel cable 310, voussoir 320 and brake block 330, one end of described braking steel cable 310 is connected with described brake disc 280, this braking
The other end of steel cable 310 is connected with brake block 330, and described brake block 330 is in the presence of braking steel cable 310 and voussoir 320
The guide rail 600 of removable and close lift car 500；Described microswitch 400 is arranged at voussoir 320 and brake block 330
Contact surface.
Wherein in an embodiment, this elevator overspeed protecting device include multipair be arranged at lift car 600 top and
The overspeed protection sub-device 100 of bottom.
Wherein in an embodiment, described brake disc 280 is arranged on described axis 220 by unilateral bearing.
Wherein in an embodiment, described voussoir 320 and brake block 330 may be contained within underframe 210 and be located at system
The lower section of Moving plate 280, described voussoir 320 and brake block 330 are right-angled trapezium shape；Described voussoir 320 is wide at the top and narrow at the bottom, should
The hypotenuse of voussoir 320 is near brake block 330；Described brake block 330 is up-narrow and down-wide, and the hypotenuse of this brake block 330 is near voussoir
320；The height of described voussoir 320 is more than the height of brake block 330, and described microswitch 400 is arranged at voussoir 320 and braking
The contact surface of block 330, and this microswitch 400 is higher than brake block 330.
Wherein in an embodiment, one end that described braking steel cable 310 connects described brake block 330 is provided with hook,
Described braking steel cable 310 is connected with brake block 330 by this hook.
Wherein in an embodiment, the periphery of described speed limited wheel 230 is provided with skid resistant course.
Wherein in an embodiment, the one side setting that described brake block 330 is contacted with the guide rail 600 of lift car 500
There is damping friction layer.
Wherein in an embodiment, described brake block 330 braking steel cable 310 pulling under respectively with lift car
500 guide rail 600 contacts with speed limited wheel 230, and the one side that described brake block 330 is contacted with speed limited wheel 230 is provided with damping friction
Layer.
Embodiment described above only have expressed the specific embodiment of the present invention, and its description is more concrete and detailed, but simultaneously
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformation can also be made and improve, these broadly fall into the guarantor of the present invention
Shield scope.
Claims (8)
1. a kind of elevator overspeed protecting device is it is characterised in that include two overspeed protections being symmetricly set in outside lift car
Sub-device, described overspeed protection sub-device is included automatic brake mechanism, safe jaw mechanism and is electrically connected with elevator safety loop
Microswitch；Described automatic brake mechanism includes underframe, speed limited wheel, brake disc and two and gets rid of block, and described underframe sets
It is equipped with the axis vertical with the guide rail of lift car, described speed limited wheel and brake disc are rotatably arranged on axis, and should
Speed limited wheel periphery and the guide rail contact of lift car, described speed limited wheel is symmetrically arranged with its center of circle near the side of brake disc
Two bearing pins, block is eccentric respectively is arranged on two bearing pins for getting rid of described in two, and gets rid of block with speed limited wheel described in two
The center of circle is centrosymmetric setting, and the described block that gets rid of is provided with ratchet away from one end of its corresponding bearing pin, one of them get rid of block away from
One end of bearing pin is connected with speed limited wheel by extension spring, and this gets rid of block and passes through connecting rod near one end of bearing pin to get rid of block remote with another
It is flexibly connected from one end of bearing pin, described brake disc is provided with and the groove getting rid of block phase wedging and ratchet；Described safety tongs
Mechanism includes braking steel cable, voussoir and brake block, and one end of described braking steel cable is connected with described brake disc, this braking steel cable
The other end be connected with brake block, described brake block is removable and near lift car in the presence of braking steel cable and voussoir
Guide rail；Described microswitch is arranged at the contact surface of voussoir and brake block.
2. elevator overspeed protecting device according to claim 1 is it is characterised in that this elevator overspeed protecting device includes two
To the overspeed protection sub-device being respectively arranged at elevator car roof and bottom.
3. elevator overspeed protecting device according to claim 1 and 2 is it is characterised in that described brake disc is by unidirectional
Bearing is arranged on described axis.
4. elevator overspeed protecting device according to claim 3 is it is characterised in that described voussoir and brake block are respectively provided with
In underframe and be located at the lower section of brake disc, described voussoir and brake block are right-angled trapezium shape；Under width on described voussoir
Narrow, the hypotenuse of this voussoir is near brake block；Described brake block is up-narrow and down-wide, and the hypotenuse of this brake block is near voussoir；Described wedge
The height of block is more than the height of brake block, and described microswitch is arranged at the contact surface of voussoir and brake block, and this fine motion is opened
Closing is higher than brake block.
5. elevator overspeed protecting device according to claim 4 is it is characterised in that described braking steel cable connects described braking
One end of block is provided with hook, and described braking steel cable is connected with brake block by this hook.
6. elevator overspeed protecting device according to claim 5 is it is characterised in that the periphery of described speed limited wheel is provided with
Skid resistant course.
7. elevator overspeed protecting device according to claim 6 is it is characterised in that the leading of described brake block and lift car
The one side of rail contact is provided with damping friction layer.
8. elevator overspeed protecting device according to claim 7 is it is characterised in that described brake block is braking drawing of steel cable
Contact with the guide rail of lift car and speed limited wheel respectively under dynamic, the one side that described brake block is contacted with speed limited wheel is provided with damping and rubs
Wipe layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610954094.5A CN106429698A (en) | 2016-10-27 | 2016-10-27 | Over-speed protection device for elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610954094.5A CN106429698A (en) | 2016-10-27 | 2016-10-27 | Over-speed protection device for elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106429698A true CN106429698A (en) | 2017-02-22 |
Family
ID=58179194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610954094.5A Pending CN106429698A (en) | 2016-10-27 | 2016-10-27 | Over-speed protection device for elevator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106429698A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111498638A (en) * | 2020-05-22 | 2020-08-07 | 福州快科电梯工业有限公司 | Mechanical speed limiting protection device for elevator and working method thereof |
| CN111776912A (en) * | 2020-07-20 | 2020-10-16 | 台州学院 | Elevator safety tongs and elevator |
| CN114249203A (en) * | 2020-09-24 | 2022-03-29 | 湖南大举信息科技有限公司 | Safety protection device for multi-car parallel elevator |
| CN114249201A (en) * | 2020-09-24 | 2022-03-29 | 湖南大举信息科技有限公司 | Speed limiter for multi-car parallel elevator |
| CN114261864A (en) * | 2021-12-31 | 2022-04-01 | 湖南大举信息科技有限公司 | Emergency rescue method for cable-free self-driven elevator |
| CN114408699A (en) * | 2021-12-25 | 2022-04-29 | 湖南亚富智能设备股份有限公司 | Novel linkage structure of safety tongs at top of household elevator car |
| CN115072518A (en) * | 2022-06-16 | 2022-09-20 | 常熟理工学院 | Cordless speed-limiting safety tongs |
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| CN2098492U (en) * | 1991-08-28 | 1992-03-11 | 侯庆祥 | Overrunning governor for lift |
| CN1397480A (en) * | 2002-08-14 | 2003-02-19 | 宁波欣达电梯配件厂 | Speed-limiting safety jaw |
| CN2923627Y (en) * | 2006-01-25 | 2007-07-18 | 周友仁 | Guide-wheel speed-limiting device |
| CN101301976A (en) * | 2008-07-07 | 2008-11-12 | 西子奥的斯电梯有限公司 | Integrated security device of elevator |
| CN101549818A (en) * | 2008-04-01 | 2009-10-07 | 上海三菱电梯有限公司 | Elevator brake |
| CN202245610U (en) * | 2011-07-21 | 2012-05-30 | 刘炯棠 | Speed limiter |
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| CN103253575A (en) * | 2013-05-29 | 2013-08-21 | 江南嘉捷电梯股份有限公司 | Lift car frame speed limiting device |
| CN103420246A (en) * | 2013-08-23 | 2013-12-04 | 宁波赛富特电梯部件有限公司 | Rope clamp |
| CN206108606U (en) * | 2016-10-27 | 2017-04-19 | 宜春市特种设备监督检验中心 | Elevator overspeed protective device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2098492U (en) * | 1991-08-28 | 1992-03-11 | 侯庆祥 | Overrunning governor for lift |
| CN1397480A (en) * | 2002-08-14 | 2003-02-19 | 宁波欣达电梯配件厂 | Speed-limiting safety jaw |
| CN2923627Y (en) * | 2006-01-25 | 2007-07-18 | 周友仁 | Guide-wheel speed-limiting device |
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| CN101301976A (en) * | 2008-07-07 | 2008-11-12 | 西子奥的斯电梯有限公司 | Integrated security device of elevator |
| CN202245610U (en) * | 2011-07-21 | 2012-05-30 | 刘炯棠 | Speed limiter |
| CN102514996A (en) * | 2011-12-30 | 2012-06-27 | 江南嘉捷电梯股份有限公司 | Elevator speed limiting device |
| CN103253575A (en) * | 2013-05-29 | 2013-08-21 | 江南嘉捷电梯股份有限公司 | Lift car frame speed limiting device |
| CN103420246A (en) * | 2013-08-23 | 2013-12-04 | 宁波赛富特电梯部件有限公司 | Rope clamp |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111498638A (en) * | 2020-05-22 | 2020-08-07 | 福州快科电梯工业有限公司 | Mechanical speed limiting protection device for elevator and working method thereof |
| CN111776912A (en) * | 2020-07-20 | 2020-10-16 | 台州学院 | Elevator safety tongs and elevator |
| CN114249203A (en) * | 2020-09-24 | 2022-03-29 | 湖南大举信息科技有限公司 | Safety protection device for multi-car parallel elevator |
| CN114249201A (en) * | 2020-09-24 | 2022-03-29 | 湖南大举信息科技有限公司 | Speed limiter for multi-car parallel elevator |
| CN114408699A (en) * | 2021-12-25 | 2022-04-29 | 湖南亚富智能设备股份有限公司 | Novel linkage structure of safety tongs at top of household elevator car |
| CN114408699B (en) * | 2021-12-25 | 2023-08-22 | 湖南亚富智能设备股份有限公司 | Novel household elevator car roof safety tongs linkage structure |
| CN114261864A (en) * | 2021-12-31 | 2022-04-01 | 湖南大举信息科技有限公司 | Emergency rescue method for cable-free self-driven elevator |
| CN115072518A (en) * | 2022-06-16 | 2022-09-20 | 常熟理工学院 | Cordless speed-limiting safety tongs |
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Application publication date: 20170222 |