CN104444698B - Elevator self adaptation reduces the buffer system of damping force - Google Patents
Elevator self adaptation reduces the buffer system of damping force Download PDFInfo
- Publication number
- CN104444698B CN104444698B CN201410776246.8A CN201410776246A CN104444698B CN 104444698 B CN104444698 B CN 104444698B CN 201410776246 A CN201410776246 A CN 201410776246A CN 104444698 B CN104444698 B CN 104444698B
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- damping
- buffer
- engagement
- elevator
- piston rod
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- 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
- B66B5/28—Buffer-stops for cars, cages, or skips
- B66B5/282—Structure thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses a kind of elevator self adaptation reduces the buffer system of damping force, including Buffer Unit and magnetorheological reduction damper assembly；Buffer Unit is fixedly installed on elevator bottom to be used for preventing elevator car rigid touch bottom；Magnetorheological reduction damper assembly includes magnetorheological damping body and control system；Magnetorheological damping body forms reduction damping to Buffer Unit；The present invention bottoms out buffering in car and terminates the speed that the engagement of pre reduction damper assembly is played a part of to limit resilience, ensure gentle resilience, and the parameter of the parameter adjustment magnetic flow liquid fallen according to elevator car, as falling speed greatly if can cause bigger screen resilience, then magnetic flow liquid electrical current increases retrogradation, to increase reduction damping force, while, magnetic flow liquid viscosity also can adjust in reduction damping process, it is ensured that resilience Erlotinib；Avoid because buffer spring coefficient of elasticity is excessive or the long and caused secondary security incident for causing that rebounds of compression travel.
Description
Technical field
The present invention relates to a kind of special safety equipment system, special type is related to the security system that a kind of cage type elevator is bottomed out.
Background technology
Cage type elevator is a kind of vehicles for solving vertical transport, is closely connected with daily life；Existing
Cage type elevator is mainly made up of traction machine, switch board, car, guide rail etc., realizes more rapidly uplink and downlink；In order to realize
Uplink and downlink simultaneously install relevant device, building or other using where cage type elevator can type of construction elevators hoistway, with reality
Existing trouble-free operation.
By mechanical force traction, the uplink and downlink of cage type elevator typically realize that structure is complex, due to use environment,
The problems such as cycle and ageing equipment, quality, drop in the case of causing lift car without constraint or finite constraint, tool
There is more serious safety problem.In prior art, in order to solve by car rigid touch bottom (directly dropping to shaft bottom) to taking advantage of
Seated user causes serious danger, arranges buffer unit in shaft bottom；For express elevator buffer unit is hydraulic cushion, for
Slower elevators then typically using buffer spring structure, and so consider mainly the coefficient of elasticity of spring, stroke and car it
Between relation, if elastic force is excessive, larger bounce can be carried out, cause bigger injury, therefore, express elevator then can not
Using the spring that coefficient of elasticity is larger；And in fact, for express elevator, due to speed, and Action of Gravity Field is added, liquid
The buffering of pressure buffering has more slowly, can still produce more serious rigid collision, so as to cause the accident.
Accordingly, it would be desirable to be improved to existing elevator cushion construction, it is suitable to all cage type elevators and uses, in elevator accident
When bottoming out, ensure that gentle, gradual compression buffering and return, it is to avoid because the coefficient of elasticity of buffer spring excessive or
The long and caused secondary security incident for causing that rebounds of compression travel.
Content of the invention
In view of this, it is an object of the invention to provide a kind of elevator self adaptation reduces the buffer system of damping force, it is suitable to own
Cage type elevator is used, and when elevator accident is bottomed out, ensure that gentle, gradual compression buffering and return, it is to avoid because slow
Rush spring coefficient of elasticity is excessive or the long and caused secondary security incident for causing that rebounds of compression travel.
The elevator self adaptation of the present invention reduces the buffer system of damping force, including Buffer Unit and magnetorheological reduction damping group
Part；
The Buffer Unit is fixedly installed on elevator bottom to be used for preventing elevator car rigid touch bottom；
The magnetorheological reduction damper assembly includes magnetorheological damping body and control system；
The control system includes：
Solenoid, for providing electromagnetic field for magnetorheological damping body；
Power subsystem, for providing power supply for solenoid；
Descent parameters detector unit, for detecting the descent parameters of elevator car；
CPU, for receiving the data-signal of descent parameters detector unit and according to the signal to power subsystem
Offer power command is provided.
The piston rod that magnetorheological damping body is included cylinder body, damping piston and is fixedly connected with damping piston, in the cylinder body
For magnetic flow liquid, the solenoid is located at around cylinder body, is provided with damping hole on damping piston, and the piston rod is in Buffer Unit
Engage with Buffer Unit between rebound stroke after being compressed by elevator car, reduction resistance is formed to Buffer Unit by damping piston
Buddhist nun.
Further, buffer spring on the basis of the Buffer Unit includes being arranged at and it is supported in slow at the top of buffer spring
Punching, the buffer board is just to elevator car bottom；
Further, relative with piston rod be provided with the buffer board fairlead and for engage with piston rod reduction resistance
Buddhist nun's power fastener, the fairlead by can axially directed in the way of be coated at piston rod, the reduction damping force fastener is slow
Rush spring and be compressed between rebound stroke by elevator car and engage with piston rod, the piston normality is close to cylinder base；
Further, reduction damping force fastener be by can along piston rod radially wobble in the way of be articulated with connecing on buffer board
Close bar, engagement bar lower end is provided with the engagement boss for extending internally, be provided with the piston rod for after engagement bar is descending with connect
Close the engagement groove that boss forms hasp；The fairlead is provided with the groove that at least can be used for radial through engagement boss；
Further, engagement bar passes through gravity vertically downward, and engagement boss extends inward into fairlead extended distance to be made to connect
Close boss inner end and can extend into engagement groove；It is used for by the groove for engaging boss in the tangential of fairlead on the fairlead
To engaging boss shape into spacing.
Further, the engagement boss lower surface is the acclivitous inclined-plane of ecto-entad, and the piston rod top is cone
Platform structure；
Further, the engagement groove is the cannelure around piston rod；
Further, the axial location of boss is engaged when the lower edge of the engagement groove is less than buffer spring limited compression；
Further, the descent parameters detector unit includes：
Falling speed detection sensor, for detecting elevator car falling speed parameter；
Elevator car weight parameter sensor, for detecting the real-time load weight parameter of elevator car；
Further, whereabouts contact detection sensor, during for detecting that elevator car is fallen and contacted with Buffer Unit
The pressure parameter produced by Buffer Unit.
Beneficial effects of the present invention：The elevator self adaptation of the present invention reduces the buffer system of damping force, using buffer spring
The structure that component is combined with magnetorheological reduction damper assembly, bottoms out buffering end pre reduction damper assembly engagement in car and plays
Limit the effect of the speed of resilience, it is ensured that gentle resilience, and the ginseng of the parameter adjustment magnetic flow liquid fallen according to elevator car
Number, as falling speed greatly if can cause bigger screen resilience, then magnetic flow liquid electrical current increase retrogradation, with increase reduction damping
Power, meanwhile, magnetic flow liquid viscosity is also can adjust in reduction damping process, it is ensured that resilience Erlotinib；The present invention utilizes buffering group
Part realizes downstream buffer, due to the presence of magnetorheological reduction damper assembly, can also increase the cushion stroke and elasticity of Buffer Unit
Coefficient, thus the realization buffering that more can be relaxed, avoid quick resilience using reduction damping after buffering, it is ensured that final buffering effect
Really；Therefore, the structure is suitable to all cage type elevators uses, when elevator accident is bottomed out, ensure that gentle, gradual compression
Buffering and return, it is to avoid because the coefficient of elasticity of buffer spring is excessive or the long and caused secondary bounce-back of compression travel is caused
Security incident.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the structural representation of the present invention.
Specific embodiment
Fig. 1 is the structural representation of the present invention, as shown in the figure：The elevator self adaptation of the present embodiment reduces the buffering of damping force
System, including Buffer Unit and magnetorheological reduction damper assembly；
The Buffer Unit is fixedly installed on elevator bottom to be used for preventing 1 rigid touch bottom of elevator car；
The magnetorheological reduction damper assembly includes magnetorheological damping body and control system；
The control system includes：
Solenoid 19, for providing electromagnetic field for magnetorheological damping body；
Power subsystem 16, for providing power supply for solenoid；
Descent parameters detector unit, for detecting the descent parameters of elevator car；
CPU 17, for receiving the data-signal of descent parameters detector unit and according to the signal to power supply list
Unit sends offer power command；
The piston rod 12 that magnetorheological damping body is included cylinder body 9, damping piston 10 and is fixedly connected with damping piston 10, described
Piston rod 12 is engaged between rebound stroke with Buffer Unit after Buffer Unit is compressed by elevator car 1, in the cylinder body is
Magnetic flow liquid, the solenoid are located at around cylinder body, are provided with damping hole, by damping piston 10 to Buffer Unit on damping piston
Reduction damping is formed, and reduction damping refers to damping be formed when the reduction after being compressed deforms；Piston rod 12 and Buffer Unit
The mode of engagement can adopt mechanical automatic locking button, electromagnetism engagement etc. mode, and certainly, electromagnetism engagement needs to adopt data
Collect and automatically controlled, will not be described here；The setting of engagement can be carried out according to the stroke of Buffer Unit (such as buffer spring)
Set, such as in the compression travel limit of Buffer Unit or before, or the bounce of elastic deformation in Buffer Unit etc.
In the node that elevator car comparatively fast can rebound, can be designed by the means of prior art and be obtained a result, here is no longer gone to live in the household of one's in-laws on getting married
State；As illustrated, there is damping hole (being sized as needed and quantity) on damping piston 10, piston is transported under external force
When dynamic, damping liquid is only passed through by damping hole, and stroke is damped；When piston is moved under external force, magnetic flow liquid only passes through
Damping hole passes through, and viscosity determines damping force and forms damping；As illustrated, cylinder body 9 is embedded among basis 8, solenoid 20
Isolated by division board in basis and with basis 8,9 top of cylinder body is sealed by cylinder cap 11, cylinder cap 11 is by being embedded on basis 8
Foundation bolt 7 be sealedly attached to cylinder body 9, be integrally formed the axle sleeve 12 for being oriented to piston rod on cylinder cap 11；Using buffering
Component and the magnetorheological reduction structure that combines of damper assembly, it is possible to increase the cushion stroke of Buffer Unit and increase as needed
The elastic coefficient, more can relaxed realize buffering and rebound；The structure is suitable to all cage type elevators and uses, and touches in elevator accident
During bottom, gentle compression buffering and gentle bounce-back is ensure that.
Elevator car 1 can have different speed and inertia according to differing heights and load-carrying in dropping process, because
And for Buffer Unit, different impulsive forces can be obtained, certainly, upon compression, elevator car also just obtains different anti-
Elastic force, and in prior art, it is impossible to realize buffering using larger coefficient of elasticity spring, be exactly in order to avoid larger buffering is anti-
Hand over caused by elastic force big dangerous；In the present invention, the gravity that detected using descent parameters detector unit, speed and to buffering dress
The pressure parameter of generation is put, certainly, the parameter needed for other can be also detected；Solenoid 20 is adjusted by CPU 17
Energization intensity, to adjust magnetic field intensity, so as to reach adjustment magnetic flow liquid machinery, physical property purpose, to change reduction
Damping force；When gravity, speed and to Buffer Unit produce pressure parameter bigger than normal when, due to using larger coefficient of elasticity bullet
Spring, preferably prevents high speed resilience caused by big elastic force, then by increase and adjustment energization intensity, magnetic flow liquid entirety retrogradation,
Reduction damping force increases, and forms the self adaptation reduction damping to big elastic force resilience, it is ensured that the resilience that releives；Vice versa；Central authorities
Processing unit is then belonged to using much energization intensity according to great gravity, speed and to the pressure parameter that buffer unit is produced
In existing be confirmable control method by experiment, will not be described here.
In the present embodiment, the Buffer Unit include being arranged on the basis of buffer spring 3 and be supported in buffer spring top
The buffer board 15 in portion, the buffer board 15 is just to elevator car bottom；Basis 8 refers to the base of the installation for Buffer Unit
Plinth；As illustrated, being additionally provided with the basis of for installing the spring base 6 of buffer spring 3, can be used for the maximum pressure for adjusting spring 3
Indention journey and limited compression position；The quantity of buffer spring 3 can be installed as needed, and generally more than three circumferentially square
To being uniformly arranged；Can be installed with being merged into capable welding using lead column at the top of buffer board 15 and buffer spring 3, it is to avoid buffering is anti-
Depart from during bullet.
In the present embodiment, the buffer spring 3 is variable-pitch spring；Damping force in buffering course is bottomed out in elevator car 1
Gradually increase, and increase process is rapid and gentle compared with common spring, realize the ride comfort of downstream buffer and with enough
Damping force, therefore can increase the coefficient of elasticity of cushion stroke and gradual change compared with prior art, can form automatic adjustment spring power
The technical scheme of this critical performance parameters, is applicable to express elevator and uses, the effect with dynamic application at any time, in conjunction with
The damping structure for going forward one by one relative with buffer spring so that elevator car 1 bottoms out the comfortable of the moment of front and contact Buffer Unit
Property and reliability effectively improve, the security performance of hoisting elevator.
In the present embodiment, the pitch of the buffer spring 3 is become larger from bottom to top；Can be in the wink of the contact of elevator car 1
Between can submissive buffering at once, and gradually increase coefficient of elasticity.
In the present embodiment, relative with piston rod 12 be provided with the buffer board 15 fairlead 4 and for and piston rod 12
The reduction damping force fastener 14 of engagement, the fairlead 4 by can axially directed in the way of be coated at piston rod 12, the reduction
Damping force fastener is compressed between rebound stroke by elevator car 1 in buffer spring 3 and is engaged with piston rod 12, the piston 10
Normality is close to 9 bottom of cylinder body；The structure can ensure that buffer board 15 is stablized descending after being compressed in buffer spring 3, and ensures also
Former damping force fastener 14 is aligned with piston rod 12 and is engaged.
In the present embodiment, reduction damping force fastener 14 be by can along piston rod 12 radially wobble in the way of be articulated with buffering
Engagement bar on plate 15, engagement bar lower end are provided with the engagement boss 13 for extending internally, and are provided with for connecing on the piston rod 12
With the engagement groove 5 for engaging the formation hasp of boss 13 after conjunction bar is descending；The fairlead 4 be provided with least can be used for radial through
The groove 2 of engagement boss 13；Buffer board overcomes the elastic force compression spring of buffer spring 3 in the presence of lift car whereabouts,
When falling setting position under lift car 1, engagement boss 13 is embedded engages groove 5, and now piston rod 12 is contacted with engagement boss 13
Position have and incline, to produce radially outer component, at engagement boss set back and make to connect after making engagement bar outside
Close the embedded engagement groove of boss；The setpoint distance normally close in the limited compression position of buffer spring, to give full play to spring
Buffering, extend compression travel.
In the present embodiment, engagement bar by gravity vertically downward, engagement boss 13 extend inward into fairlead and extend away from
Engagement groove 5 be can extend into from 13 inner end of engagement boss is made；It is used for leading by engaging the groove of boss on the fairlead 4
To the tangential to engaging boss shape into spacing, the tangential direction for tangentially referring to along the circumferential direction of fairlead 4 of set 4；Structure letter
Single and easy for installation, and ensure the engagement between engagement boss 13 and engagement groove 5 and separate, it is to avoid there is deviation, particularly
Reduction damping process upon engagement, prevents from disengaging so as to avoiding losing damping force.
In the present embodiment, engagement boss 13 lower surface is the acclivitous inclined-plane of ecto-entad, the piston rod 12
Top is frustum structure；The structure that frustum structure and inclined-plane combine to ensure that and produce radially outer point in the moment of contact
Power, it is to avoid disturb, so that engaging process is smooth.
In the present embodiment, the engagement groove 5 is the cannelure around piston rod；Processing is simply and readily engaged, it is to avoid
Because bonding station is not corresponding caused by the rotation of piston rod 12.
In the present embodiment, the lower edge of the engagement groove 5 engages the axle of boss 13 when being less than 3 limited compression of buffer spring
To position, it is to avoid engagement boss 13 exceedes engagement groove 5 during descending, prevents the rigid contact that there is no need, so as to keep away
Exempt from the damage of generation part.
In the present embodiment, the descent parameters detector unit includes：
Falling speed detection sensor 18, for detecting elevator car falling speed parameter；Elevator is arranged at, can be adopted
Hall element such as tests the speed at the existing velocity sensor, will not be described here；
Elevator car weight parameter sensor 21, for detecting the real-time load weight parameter of elevator car.May be disposed at
Elevator car bottom or other load parts；
The present embodiment also includes whereabouts contact detection sensor 19, for detect elevator car 1 fall and with buffering
Pressure parameter Buffer Unit produced during component touch；Whereabouts contact detection sensor 19 is arranged at elevator car anon-normal
The part contacted when often falling, the buffer board upper surface of such as the present embodiment；
The needs that buffering inertia can be obtained by above-mentioned elevator car falling speed parameter and real-time load weight parameter,
CPU obtains inertial data in advance according to above-mentioned parameter and adjusts the size of electric current in advance, and the adjustment is under elevator
Carry out by during falling, real-time inertial parameter is obtained according to falling speed, overall weight, be likely to form so as to obtain
Maximum screen resilience scope, the viscosity of real-time adjustment magnetic flow liquid, and have；When actually used,
There is when elevator car is fallen and contacted with Buffer Unit effect promptly and accurately to the pressure parameter that Buffer Unit is produced, can be accurate
The actual impulsive force of true acquisition, so as to reach the purpose of correction to the inertial parameter of above-mentioned two gain of parameter, should be with pressure
Parameter and the big person of the inertia force for obtaining are defined；Due to having detection in real time, cause also in the springback process after buffer limit
Former damping force has, and is also unlikely to the change with mutation and impulsive force after pressure parameter correction；
The inertial parameter of above-mentioned acquisition simultaneously adjusts magnetic flow liquid viscosity according to inertial parameter, by simply calculating and prior art
Program can achieve, and will not be described here.
Finally illustrate, above example is only unrestricted in order to technical scheme to be described, although with reference to compared with
Good embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent, and without deviating from the objective and scope of technical solution of the present invention, which all should be covered at this
In the middle of the right of invention.
Claims (5)
1. a kind of elevator self adaptation reduces the buffer system of damping force, it is characterised in that：Including Buffer Unit and magnetorheological reduction
Damper assembly；
The Buffer Unit is fixedly installed on elevator bottom to be used for preventing elevator car rigid touch bottom；
The magnetorheological reduction damper assembly includes magnetorheological damping body and control system；
The control system includes：
Solenoid, for providing electromagnetic field for magnetorheological damping body；
Power subsystem, for providing power supply for solenoid；
Descent parameters detector unit, for detecting the descent parameters of elevator car；
CPU, for receiving the data-signal of descent parameters detector unit and being sent to power subsystem according to the signal
Power command is provided；
It is magnetic in the piston rod that magnetorheological damping body is included cylinder body, damping piston and is fixedly connected with damping piston, the cylinder body
Rheology liquid, the solenoid are located at around cylinder body, are provided with damping hole on damping piston, and the piston rod is electric in Buffer Unit
Engage with Buffer Unit between rebound stroke after the compression of elevator car body, reduction damping is formed to Buffer Unit by damping piston；
The Buffer Unit include being arranged on the basis of buffer spring and the buffer board that is supported at the top of buffer spring, described slow
Punching is just to elevator car bottom；Relative with piston rod fairlead is provided with the buffer board and for engaging with piston rod
Reduction damping force fastener, the fairlead by can axially directed in the way of be coated at piston rod, reduction damping force engagement
Part is compressed between rebound stroke by elevator car in buffer spring and is engaged with piston rod, and the piston normality is close to cylinder body bottom
Portion；
Reduction damping force fastener be by can along piston rod radially wobble in the way of be articulated with engagement bar on buffer board, engage bar
Lower end is provided with the engagement boss for extending internally, be provided with the piston rod for engagement bar descending after with engage boss formation take
The engagement groove of button；The fairlead is provided with the groove that at least can be used for radial through engagement boss；Engagement bar passes through gravity
Vertically downward, engagement boss extends inward into fairlead and extended distance makes engagement boss inner end can extend into engagement groove；
It is used on the fairlead by the groove for engaging boss in the tangential to engaging boss shape into spacing of fairlead；The engagement is convex
Platform lower surface is the acclivitous inclined-plane of ecto-entad, and the piston rod top is frustum structure.
2. elevator self adaptation according to claim 1 reduces the buffer system of damping force, it is characterised in that：The engagement is recessed
Groove is the cannelure around piston rod.
3. elevator self adaptation according to claim 1 reduces the buffer system of damping force, it is characterised in that：The engagement is recessed
The lower edge of groove engages the axial location of boss when being less than buffer spring limited compression.
4. elevator self adaptation according to claim 1 reduces the buffer system of damping force, it is characterised in that：The whereabouts ginseng
Number detector unit includes：
Falling speed detection sensor, for detecting elevator car falling speed parameter；
Elevator car weight parameter sensor, for detecting the real-time load weight parameter of elevator car.
5. elevator self adaptation according to claim 4 reduces the buffer system of damping force, it is characterised in that：
Whereabouts contact detection sensor, produces to Buffer Unit when elevator car is fallen and contacted with Buffer Unit for detecting
Raw pressure parameter.
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| CN201410776246.8A CN104444698B (en) | 2014-12-15 | 2014-12-15 | Elevator self adaptation reduces the buffer system of damping force |
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| CN201410776246.8A CN104444698B (en) | 2014-12-15 | 2014-12-15 | Elevator self adaptation reduces the buffer system of damping force |
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| CN106015421B (en) * | 2016-03-19 | 2018-05-22 | 沈阳工业大学 | For the new two cavitys impact-resistant isolation device of on-board equipment |
| JP6731047B2 (en) * | 2016-06-24 | 2020-07-29 | 日立オートモティブシステムズ株式会社 | Damping force adjustable shock absorber and solenoid |
| CN106763442A (en) * | 2016-11-08 | 2017-05-31 | 安徽理工大学 | The self-supplied magnetic current liquid damp type shock absorber of miniature precision instrument |
| CN107686034B (en) * | 2017-08-25 | 2019-04-02 | 辽宁工程技术大学 | A kind of elevator hydraulic damping device |
| CN107713538A (en) * | 2017-09-22 | 2018-02-23 | 广州本元信息科技有限公司 | Weighing device and shelf of weighing |
| CN108861946B (en) * | 2018-08-16 | 2021-02-09 | 英沃电梯有限公司 | Elevator protection device |
| CN109573778B (en) * | 2019-01-02 | 2023-12-22 | 广州广日电梯工业有限公司 | Magneto-rheological elevator buffer and control method |
| CN110639800A (en) * | 2019-10-09 | 2020-01-03 | 济南大学 | Novel damping support device for vibrating screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08247203A (en) * | 1995-03-11 | 1996-09-24 | Nobuhito Kawachi | Electroviscous fluid buffer |
| JP4427159B2 (en) * | 2000-03-28 | 2010-03-03 | 三菱電機株式会社 | Elevator buffer |
| JP2005054847A (en) * | 2003-08-01 | 2005-03-03 | Univ Kanagawa | Viscous variable fluid shock absorber |
| CN201779206U (en) * | 2010-07-13 | 2011-03-30 | 沈阳长城液压机械制造有限公司 | Electromagnetic shock absorber capable of changing force |
| CN203246978U (en) * | 2013-05-09 | 2013-10-23 | 中国化学工程第十三建设有限公司 | Construction elevator falling buffering device |
| CN204324640U (en) * | 2014-12-15 | 2015-05-13 | 重庆和航科技股份有限公司 | Adaptive damping prevents the elevator buffer device of quick resilience |
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Effective date of registration: 20200930 Address after: New Jing Zhong Yang She Zhen Tang Suzhou City, Jiangsu province 215600 city of Zhangjiagang City, room 5 No. 10-1 Patentee after: ZHANGJIAGANG OUWEI AUTOMATION RESEARCH AND DEVELOPMENT Co.,Ltd. Address before: Jiulongpo Branch Park four street 400039 Chongqing City No. 52 standard factory building 3 floor K Patentee before: CHONGQING HEHANG TECHNOLOGY Co.,Ltd. |
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