CN109052105A - A kind of machine-roomless lift arragement construction - Google Patents
A kind of machine-roomless lift arragement construction Download PDFInfo
- Publication number
- CN109052105A CN109052105A CN201811046122.9A CN201811046122A CN109052105A CN 109052105 A CN109052105 A CN 109052105A CN 201811046122 A CN201811046122 A CN 201811046122A CN 109052105 A CN109052105 A CN 109052105A
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- Prior art keywords
- car
- counterweight
- guide rail
- machine
- steel belt
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- 238000010276 construction Methods 0.000 title description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 51
- 239000010959 steel Substances 0.000 claims abstract description 51
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 230000035939 shock Effects 0.000 claims 2
- 238000005516 engineering process Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012357 Gap analysis Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Automation & Control Theory (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
本发明公开了一种无机房电梯布置结构，包括轿厢、轿厢导轨、曳引系统、对重、对重导轨以及对重带轮；轿厢包括立梁和轿厢带轮，轿厢带轮设置在立梁的下部，且不超出轿厢的轿底；轿厢导轨相对地设于井道上，且位于前、后立梁之间，轿厢导轨与轿厢滑动连接；对重导轨单侧设置，并安装在井道上；对重与对重导轨滑动连接；对重带轮设于对重上；曳引系统包括曳引机和钢带；曳引机置于井道的上方，并安装于井道或对重导轨上；钢带的一端设置在轿厢导轨的上方，另一端依次穿绕过轿厢带轮、曳引机以及对重带轮，并安装在井道或对重导轨上。本发明提供的电梯布置结构具有更低的底坑深度和顶层，和更小的井道平面尺寸。
The invention discloses an arrangement structure of an elevator without a machine room, which comprises a car, a car guide rail, a traction system, a counterweight, a counterweight guide rail and a counterweight pulley; The wheels are set at the lower part of the vertical beam, and do not exceed the car bottom of the car; the car guide rail is relatively set on the hoistway, and is located between the front and rear vertical beams, and the car guide rail is slidingly connected with the car; the counterweight guide rail is single The counterweight is slidingly connected with the counterweight guide rail; the counterweight pulley is set on the counterweight; the traction system includes a traction machine and a steel belt; the traction machine is placed above the well and installed On the hoistway or counterweight guide rail; one end of the steel belt is set above the car guide rail, and the other end passes around the car pulley, traction machine and counterweight pulley in turn, and is installed on the hoistway or counterweight guide rail. The elevator layout structure provided by the present invention has lower pit depth and top floor, and smaller hoistway plane size.
Description
Technical field
The present invention relates to the machine-roomless lift arragement construction based on Steel Belt Transmission, in particular to a kind of compact-sized, occupancy
The small machine-roomless lift arragement construction in space.
Background technique
Machine-roomless lift is not take up the space in addition to hoistway relative to there is machine room elevator, and environmentally protective, has
Preferable development trend.
Elevator structure without machine room based on Steel Belt Transmission in industry at present, is influenced, usual hoistway by layout structure of elevator
Width dimensions are mostly that car width adds 600mm, and headroom height is greater than 2800mm, and pit depth is greater than 300mm, it is difficult to guarantee
Diminution tunnel dimension is carried out in the case where car casing size again.
The application proposes a kind of machine-roomless lift arragement construction, to meet lower pit depth and top layer requirement, adapts to
Smaller hoistway planar dimension.
Summary of the invention
To solve the above-mentioned problems, the technical scheme is that
A kind of machine-roomless lift arragement construction, including carriage, car guide rail, traction system, counterweight, counter weight guide track and right
Heave hand wheel；
The carriage includes vertical beam and carriage belt wheel, and the lower part of vertical beam is arranged in the carriage belt wheel, and without departing from carriage
Car floor；
The car guide rail is relatively set on hoistway, and between forward and backward vertical beam, and the car guide rail and carriage are sliding
Dynamic connection；
The counter weight guide track unilateral side setting, and be mounted on hoistway；The counterweight is slidably connected with counter weight guide track；It is described right
Heave hand wheel is set on counterweight；
The traction system includes traction machine and steel band；The traction machine is placed in the top of hoistway, and is installed on the well
On road or the counter weight guide track；The top of car guide rail is arranged in one end of the steel band, and the other end successively passed around carriage band
Wheel, traction machine and counterweight belt wheel, and be mounted on hoistway or counter weight guide track.
It preferably, further include guide shoe, the guide shoe is set on the top and the car floor of carriage, and is set in car floor
Lower guide shoe is without departing from car floor；The carriage is slidably connected by guide shoe and car guide rail.
It preferably, further include safety tongs, the safety tongs is set to the top of carriage, and be located at the upper guide shoe of car top
Lower section.
Preferably, upper guide shoe uses elastic sliding guide-boots for electric.
Preferably, the car floor includes upper car floor, car floor bracket and buffer layer, and the damping is placed on the upper car floor
Between the car floor bracket, the upper car floor, car floor bracket and buffer layer are wholely set.
Preferably, the car floor bracket, buffer layer and upper car floor are wholely set by fastener, and the fastener is fixed
In in upper car floor.
Preferably, the steel band is detached from the part of carriage belt wheel, counterweight belt wheel and traction machine into horizontal or vertical state.
It preferably, further include band cramp and steel band seat, the steel band seat is set on car guide rail, and one end of the steel band is logical
The band cramp is crossed to be mounted on steel band seat.
Preferably, traction system further includes mounting base, and the mounting base is fixed on counter weight guide track or wall of well, institute
The other end for stating traction machine and steel band is connected in mounting base.
Preferably, the two carriage belt wheels, a counterweight belt wheel and a steel band for being located opposite from elevator two sides are defined
For a pulley assemblies, then traction machine drives two groups of pulley assemblies disposed in parallel.
Compared with the existing technology, the beneficial effects of the present invention are:
1, the application situation that carriage belt wheel is underlying reduces by carriage belt wheel bring pit depth.
2, in the application, the setting of counterweight unilateral side more saves well space, thus the plane meter of hoistway relative to bilateral setting
It is very little to be reduced.
3, it in the application, sets, is eliminated by traction machine bring pit depth on traction machine, that is, in design pit depth
When, without considering the factor of traction machine, to further reduce pit depth.
4, in the application, the bottom of lower guide shoe is no more than car floor, thus by lower guide shoe bring depth, i.e., pit saves
Reduce the depth of pit.
5, it in the application, is postponed on safety tongs, pit is saved by safety tongs bring pit depth, that is, reduces pit
Depth.
6, the part of steel band disengaging carriage belt wheel, counterweight belt wheel and traction machine is hung down at horizontal or vertical state, i.e. steel band
Straight or horizontal winding enters/lays out carriage belt wheel, counterweight belt wheel and traction sheave, to make steel band the space occupied minimize, into one
The planar dimension of step reduction hoistway.
Detailed description of the invention
Fig. 1 is the front view of the layout structure of elevator of the application；
Fig. 2 is the lateral plan of the layout structure of elevator of the application；
Fig. 3 is the floor plan of the layout structure of elevator of the application；
Fig. 4 is the floor map of the layout structure of elevator of the application；
Fig. 5 is the structure diagram of the traction system of the application；
Fig. 6 is the portion the A enlarged drawing of Fig. 2；
Fig. 7 is the portion the B enlarged drawing of Fig. 2；
Fig. 8 is the portion the C enlarged drawing of Fig. 1；
Fig. 9 is that top layer pit analyzes front view；
Figure 10 is the top layer of carriage, pit analysis side view；
Figure 11 is that the top layer pit of counterweight analyzes side view；
Figure 12 is elevator plane figure Gap Analysis figure.
Wherein: 1, carriage, 11, car cab, 12, sedan-chair frame, 121, vertical beam, 122, carriage belt wheel, 123, upper beam, 124, sedan-chair
Bottom, 1241, upper car floor, 1242, car floor bracket, 1243, buffer layer, 1244, screw, 2, car guide rail, 3, traction system, 31,
Traction machine, 32, steel band, 33, mounting base, 4, counterweight, 5, counter weight guide track, 6, counterweight belt wheel, 7, guide shoe, 8, safety tongs, 9, car top
Snap ring, 10, band cramp, 11, steel band seat, 12, buffer.
Specific embodiment
It is described in detail below in conjunction with the drawings and specific embodiments.Described orientation is corresponding with door-opened elevator below
For " preceding ", with it is preceding it is opposite be " rear "；One end of steel band as described below uniformly refers to the corresponding end in the left side shown in FIG. 1, with
The other end of the lower steel band uniformly refers to the corresponding end in the right shown in FIG. 1；Following all sizes are in millimeters.
Please refer to Fig. 1-8, a kind of machine-roomless lift arragement construction, including carriage 1, car guide rail 2, traction system 3, counterweight
4, counter weight guide track 55 and counterweight belt wheel 66.
Carriage 1 includes car cab 11 and sedan-chair frame 12, wherein car cab 11 is used for load-carrying, is openable and closable cabinet；Sedan-chair frame 12
For fixing and carrying car cab 11, sedan-chair frame 12 includes vertical beam 121 and carriage belt wheel 122, what vertical beam 121 was as arranged vertically
Beam, there are four vertical beam 121, four seamed edges of the corresponding car cab 11 of four vertical beams 121 for arrangement in this programme.
Carriage belt wheel 122 is for connecting traction system 3, that is, traction system 3 is led by carriage belt wheel 122 to the offer of carriage 1
Gravitation；Carriage belt wheel 122 is installed in rotation on the lower part of vertical beam 121, i.e., rubs between steel band 32 and carriage belt wheel 122 to roll
It wipes, this scheme reduces the frictional dissipations of system；The bottom of carriage belt wheel 122 without departing from sedan-chair frame 12 car floor 124, relative to existing
Having by the situation that carriage belt wheel 122 is underlying in technology, this programme is at least reduced by 122 bring pit depth of carriage belt wheel,
That is, when designing pit depth, without the factor for considering carriage belt wheel 122.
The two sides of sedan-chair frame 12 are equipped with carriage belt wheel 122, and in other words, in an elevator, at least there are two carriage belt wheels
122, when only there are two when carriage belt wheel 122, which is located at together in preceding vertical beam, or is located on back vertical tube together；
Preceding vertical beam described in the application is interpreted as the vertical beam positioned at front side, and back vertical tube is interpreted as two vertical beams positioned at rear side.
Car guide rail 2 is oppositely disposed on hoistway, and between forward and backward vertical beam, and car guide rail 2 and carriage sliding connect
It connects.That is, car guide rail 2 is vertically laid on wall of well, and corresponded with two sides of carriage 1.
The unilateral setting of counter weight guide track 5, and be mounted on hoistway, counterweight 4 is slidably connected with counter weight guide track 5, and counterweight belt wheel 6 is set
In on counterweight 4.That is, counter weight guide track 5 is vertically laid on the wall of well of 1 side of carriage, counterweight belt wheel 6 is mounted on counterweight 4
Top, counterweight 4 connects traction system 3 by counterweight belt wheel 6, and slides on 4 track of counterweight under the action of traction system 3.
Traction system 3 includes traction machine 31 and steel band 32, and traction machine 31 is located at the top of hoistway, and be installed on hoistway or
On counter weight guide track 5；The top of car guide rail 2 is arranged in one end of steel band, and the other end successively passed around carriage belt wheel 122, traction
Machine 31 and counterweight belt wheel 6, and be mounted on hoistway or counter weight guide track 5.It postpones, is eliminated by traction machine 31 on traction machine 31
Bring pit depth, that is, when designing pit depth, without the factor for considering traction machine 31.
As shown in Fig. 1,2,5, steel band 32 is by one end, extends downwardly and passed around two carriage belt wheels 122, it is backward
On extend around traction machine 31, then again down around upwardly extending after counterweight belt wheel 6, its last other end is arranged close to drag
At the position for drawing machine 31.Traction machine 31 drives steel band 32, so that counterweight 4 be driven to slide upward or downward, and then draw carriage 1 to
Down or move upwards.
Further, sedan-chair frame 12 further includes the components such as upper beam 123.The both ends of upper beam 123 are separately connected preceding vertical beam with after
Vertical beam, two pieces upper beam 123 are arranged in parallel.Certainly, in other embodiments, it may also include four upper beams 123, the two of upper beam 123
End connection vertical beam, four upper beams 123 be sequentially connected with to be formed it is rectangular.
Specifically, layout structure of elevator further includes guide shoe 7 please continue to refer to Fig. 2,6,7, the top of carriage 1 is arranged in guide shoe 7
In the car floor 124 of portion and sedan-chair frame 12, and the lower guide shoe being set in car floor 124 is without departing from car floor 124；Carriage 1 passes through guide shoe 7 and sedan-chair
Compartment guide rail 2 is slidably connected.For convenient for stating, the guide shoe 7 defined positioned at the top of carriage 1 is upper guide shoe, positioned at leading for car floor 124
Boots 7 are lower guide shoe.Upper guide shoe and lower guide shoe it is each there are two, each correspondence in the two sides of carriage 1 one upper guide shoe and a lower guide shoe, such as
Shown in Fig. 7, the space of car floor 124 is preferably utilized between preceding vertical beam and back vertical tube in lower guide shoe, makes the knot of entire elevator
Structure is more compact.In the present solution, the bottom of lower guide shoe is no more than car floor 124, thus pit is saved by lower guide shoe bring depth,
That is, when design pit, without the factor for considering lower guide shoe.
Further, layout structure of elevator further includes safety tongs 8, and the top of carriage 1 is arranged in safety tongs 8, and is located at upper
The lower section of guide shoe.It is postponed on safety tongs 8, pit is saved by 8 bring pit depth of safety tongs, that is, when design pit depth,
Without the factor for considering safety tongs 8.
Further, upper guide shoe uses elastic sliding guide-boots for electric, that is, the guide shoe 7 for being arranged in 8 top of safety tongs is Elastic Sliding
Guide shoe, the reliability for further improving the movement of safety tongs 8 also improve the safety of elevator certainly.
Further, layout structure of elevator further includes car top snap ring 9, and car top snap ring 9 is mounted on the top of vertical beam, and with it is vertical
Beam 121 corresponds.
Specifically, car floor 124 includes upper car floor 1241, car floor bracket 1242 and buffer layer please continue to refer to Fig. 1,7,8
1243.Buffer layer 1243 is placed between car floor 1241 and car floor bracket 1242, and three in one is arranged.Upper car floor 1241 can adopt
With plate structure, the composite structure etc. of plate and reinforcing rib can also be used, being wholely set at this can be regarded as three and be fixedly connected with each other
Or be detachably connected, three can be used as an entirety and be commonly connected in vertical beam 121, can also be separately connected as individual part
In in vertical beam 121.This programme is inhaled to a certain extent using double-layered car bottom 124 plus the structure of buffer layer 1243, buffer layer 1243
The vibration of carriage 1 is received, to improve the comfort of elevator.
Further, there are a space, buffer layers between 1242 car floor bracket 1242 of car floor bracket and upper car floor 1241
1243 are located in this space.It is fixed with fastener in upper car floor 1241, resilient cushion and car floor bracket 1242 is equipped with and those
The corresponding through-hole of fastener, fastener pass through corresponding through-hole, and by upper car floor 1241, car floor bracket 1242 and buffer layer
1243 link together；Specific structure is for example: being welded with screw 1244 in upper car floor 1241, sedan-chair is sunk in the upper end of screw 1244
The upper surface at bottom 1241 passes through nut after screw 1244 sequentially passes through the buffer layer 1243 and car floor bracket 1242 of rubber material
Locking.
Further, the application does not limit the concrete shape of car floor bracket 1242, and plate, channel steel shape, work can be used
Word steel shape etc., can be opposite with the entire plane of upper car floor 1241, can also be opposite with the part plan of upper car floor 1241, such as Fig. 8 institute
Show, by taking downward opening channel steel shape car floor bracket as an example, car floor bracket 1242 is opposite with the part plan of upper car floor 1241, upper sedan-chair
Several car floor brackets 1242 are disposed on the lower surface at bottom 1241, corresponding buffer layer 1243 is also several, and and car floor
Bracket 1242 corresponds, and the car floor bracket 1242 positioned at upper 1241 periphery of car floor is connected in vertical beam 121 by fastener.
Specifically, steel band 32 is detached from carriage belt wheel 122, counterweight belt wheel 6 and traction machine 31 please continue to refer to Fig. 1,2,5
Part at horizontal or vertical state, i.e., steel band 32 is horizontal or vertical around entering/lay out carriage belt wheel 122, counterweight belt wheel 6 and drag
Running wheel.In the present solution, 32 the space occupied of steel band minimizes, thus the planar dimension of hoistway is optimized.
Specifically, layout structure of elevator further includes band cramp 10 and steel band seat 11, steel band seat please continue to refer to Fig. 1 and Fig. 5
11 are mounted on car guide rail 2, and one end of steel band is fixed on steel band seat 11 by band cramp 10.In view of steel band seat 11 and
The fixed form of steel band 32 is existing mature technology, therefore the application is not described here in detail.Certainly, the other end of steel band 32 can also lead to
Same mode is crossed to be installed.
Specifically, traction system 3 further includes mounting base 33 please continue to refer to Fig. 1, mounting base 33 is fixed on counter weight guide track 5
Or on wall of well, traction machine 31 is arranged in the mounting base 33 by fastener.In one embodiment, steel band 32 is another
One end is fixed in the mounting base 33 by band cramp 10, in order to realize that steel band 32 vertically around entering counterweight belt wheel 6, and then optimizes
Hoistway planar dimension.
Specifically, parent defines the two carriage belt wheels 122, one for being located opposite from elevator two sides with continued reference to Fig. 3 and Fig. 4
A counterweight belt wheel 6 and a steel band 32 are a pulley assemblies, then traction machine 31 drives two groups of pulley assemblies disposed in parallel,
That is, traction machine 31 drives two steel bands 32 simultaneously, carriage 1 has two groups of tractive force.This programme is promoted using two groups of pulley assemblies
The stability and safety of carriage 1.
Specifically, layout structure of elevator further includes buffer 12 please continue to refer to Fig. 1, which is mounted on hoistway
Lower section.
It is above-mentioned that the application is had been described in detail from connection relationship and positional relationship, one group of instance data is lifted below to this Shen
It please be further elaborated.The physical feature that following elevator uses is compared with the component in technology, and the area of itself and existing elevator
It is not that each components are arranged according to the arragement construction of the application.
Fig. 9-12 is please referred to, by stringent calculating and check, the structure according to the application is arranged elevator:
1. pit depth is analyzed: as shown in figures 9 and 11, pit depth H1 is 150, buffer compression travel 40, car floor
Lowest point is 90 from H2 to car floor identity distance, and for carriage in Stall leveling, car floor lowest point to pit ground distance is 150-
90=60, i.e. pit 150 can meet elevator normal operation；
2. headroom height most unfavorable combination is analyzed: as shown in Figure 10, car height H3 is 2050, buffer compression travel
40, headroom height H4 are 2600, and carriage distance H5 on car top highest point to hoistway top in top layer leveling is 172, when to weight
Top minimum clearance is 172-40-30=102 after contracting buffer；
3. shaft width HW is 1400, car width CW is 900, and shaft width is equal to car width and adds 500, relative to existing
There is technology to reduce 100, there is apparent advantage.
It should be noted that the calculating and check process are carried out according to the relevant criterion of elevator design.
Disclosed above is only some embodiments of the application, and however, this application is not limited to this, any this field
Technical staff can think variation, should all fall in the protection domain of the application.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811046122.9A CN109052105A (en) | 2018-09-07 | 2018-09-07 | A kind of machine-roomless lift arragement construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811046122.9A CN109052105A (en) | 2018-09-07 | 2018-09-07 | A kind of machine-roomless lift arragement construction |
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| Publication Number | Publication Date |
|---|---|
| CN109052105A true CN109052105A (en) | 2018-12-21 |
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ID=64760834
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811046122.9A Pending CN109052105A (en) | 2018-09-07 | 2018-09-07 | A kind of machine-roomless lift arragement construction |
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| CN (1) | CN109052105A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109733973A (en) * | 2018-12-24 | 2019-05-10 | 宁波宏大电梯有限公司 | A kind of bridge-type steel band type civil engineering structure |
| CN114873417A (en) * | 2022-05-26 | 2022-08-09 | 常熟市通润电梯厂有限公司 | Ultra-shallow pit low top layer steel belt traction home elevator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1511778A (en) * | 2002-12-27 | 2004-07-14 | 永大机电工业股份有限公司 | Machine room-less elevator system |
| CN1589230A (en) * | 2001-11-23 | 2005-03-02 | 因温特奥股份公司 | Lift system |
| CN201102846Y (en) * | 2007-09-11 | 2008-08-20 | 东莞市快意电梯有限公司 | Elevator compartment rack |
| CN201999600U (en) * | 2011-03-28 | 2011-10-05 | 江南嘉捷电梯股份有限公司 | Rescuing device for power cut of elevator without machine room |
| CN206126599U (en) * | 2016-10-18 | 2017-04-26 | 杭州奥立达电梯有限公司 | Steel band elevator car bottom structure |
| CN207275988U (en) * | 2017-10-12 | 2018-04-27 | 美迪斯智能装备有限公司 | A kind of steel band ladder car floor structure |
-
2018
- 2018-09-07 CN CN201811046122.9A patent/CN109052105A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1589230A (en) * | 2001-11-23 | 2005-03-02 | 因温特奥股份公司 | Lift system |
| CN1511778A (en) * | 2002-12-27 | 2004-07-14 | 永大机电工业股份有限公司 | Machine room-less elevator system |
| CN201102846Y (en) * | 2007-09-11 | 2008-08-20 | 东莞市快意电梯有限公司 | Elevator compartment rack |
| CN201999600U (en) * | 2011-03-28 | 2011-10-05 | 江南嘉捷电梯股份有限公司 | Rescuing device for power cut of elevator without machine room |
| CN206126599U (en) * | 2016-10-18 | 2017-04-26 | 杭州奥立达电梯有限公司 | Steel band elevator car bottom structure |
| CN207275988U (en) * | 2017-10-12 | 2018-04-27 | 美迪斯智能装备有限公司 | A kind of steel band ladder car floor structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109733973A (en) * | 2018-12-24 | 2019-05-10 | 宁波宏大电梯有限公司 | A kind of bridge-type steel band type civil engineering structure |
| CN114873417A (en) * | 2022-05-26 | 2022-08-09 | 常熟市通润电梯厂有限公司 | Ultra-shallow pit low top layer steel belt traction home elevator |
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Application publication date: 20181221 |