CN203486710U - Hoisting steel strip and elevator hoisting system comprising same - Google Patents
Hoisting steel strip and elevator hoisting system comprising same Download PDFInfo
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- CN203486710U CN203486710U CN201320533989.3U CN201320533989U CN203486710U CN 203486710 U CN203486710 U CN 203486710U CN 201320533989 U CN201320533989 U CN 201320533989U CN 203486710 U CN203486710 U CN 203486710U
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- steel band
- elevator
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Abstract
The utility model discloses a hoisting steel strip and an elevator hoisting system comprising the same. The hoisting steel strip comprises a plurality of steel wire ropes and a wrapping layer integrally wrapping the steel wire ropes, two cylindrical guide surfaces parallel to the length direction of the hoisting steel strip are formed on only two sides of the hoisting steel strip respectively, an inward recessed guide groove is formed in a pulley used with the hoisting steel strip, arc grooves corresponding to the cylindrical guide surfaces are formed in two sides of the bottom of the guide groove, and the arc radius of each arc groove is matched with that of each cylindrical guide surface. The problems of large friction coefficient and over-constraint of a plurality of guide surfaces are avoided, the hoisting steel strip can be automatically centered, deviation is avoided, the stress state of the hoisting steel strip is improved, the service life of the hoisting steel strip is prolonged, vibration and noise are reduced, the hoisting steel strip is really applicable to long-term operation of an elevator, and the service life of the hoisting steel strip is ensured while the installation process of the elevator is simplified.
Description
Technical field
The utility model relates to elevator field, and particularly a kind of elevator traction promotes steel band, and this lifting steel band is used mainly as elevator traction, carrying, suspension and lifting subassembly.
Background technology
Elevator is as a kind of vertical transport instrument, closely bound up with modern society life, along with the quickening of socioeconomic development and urbanization process, make high-rise more and more, and high-rise has become the sign in a city, some even becomes the terrestrial reference in city.Along with appearance and the socio-cultural development of high-rise, for the demand of elevator, be more and more powerful, particularly entered today of social senilization, the meaning of elevator is more great.Every day born a large amount of stream of peoples and the transportation of logistics all in running by global elevator, and it is extremely important that the effect that elevator is born in building has become, and is modern society's indispensable part of living.
Traditional elevator is mainly used steel rope as the carrier of traction and hanging, and steel rope, not only as safety component, is carrying the weight of car and counterweight, especially as the carrier of traction, drives lift car to turn round up and down.Steel rope has been used many years as elevator vitals, but its shortcoming is also very obvious, and steel rope has large, the easy wearing and tearing of rolled steel dosage, discontinuity, needs lubricate, can get rusty, maintain the shortcomings such as trouble, installation requirement height.Therefore, development along with elevator technology, occurred by the trend that promotes steel band replacement steel rope, and will be main flow future, the advantage that promotes steel band is that steel rope is incomparable, and certainly promoting steel band also has its shortcoming, such as promoting the easy sideslip of steel band left and right migration, cause vibration of elevator to produce noise, also aggravated to promote the wearing and tearing of steel band simultaneously.
For avoiding promoting steel band departing from pulley, existing pulley such as Chinese patent 00805967.5 and 201020530296.5, national standard (standard No. is GB/T11358-1999) etc. are all partial to adopt drum type groove 8a(as Fig. 1), Chinese patent 200480043744.6 adopts concave slot 8b(as Fig. 2), this kind of grooved has tangential force to produce, thereby guarantee to promote steel band 22 ' Lun Shangxiang center, moves.But will cause that the internal stress with middle part is greater than both sides like this, and the general flakiness ratio of traditional flat rubber belting is larger, internal stress obtains cambic release at Width.But width and the Thickness Ratio of the band using on elevator are smaller, adopt such technical scheme, promote stressed the wanting greatly compared with periphery of steel band centre portion, the be squeezed overplate at top of the overplate that promotes steel band bottom is stretched, steel band discontinuity, easily cause lifting steel band overplate cracking and steel band is damaged, and when wheel turnover wheel face with promote steel band and contact and can experience cross section bending, while not contacting thereafter, external force does not disappear, band reverts to plane, internal stress changes relatively sharply, there is flexural fatigue phenomenon, number of run acquires a certain degree, inner wire wire rope core occurs separated with integument, cause middle part cracking, promoting steel band scraps, operation life reduces.With regard to current production technology, the cost that promotes steel band is still higher, is about 8～10 times of steel rope cost, therefore should take into full account the service life that promotes steel band.
Also there are some designs to adopt concaveconvex shape to promote steel band, for example Chinese patent 200810061529.9, at lifting steel band, do in shape to change exactly, increased the discontinuous projection of a plurality of dispersions, between each projection, be concave surface (or adopting polywedge bet), on race, also correspondingly make male and fomale(M&F) and mate use with the projection and the concave surface that promote steel band, although also can effectively realize the guiding that promotes steel band, but the critical defect of this structure is exactly that to cause promoting the friction coefficient of steel band and race larger, promoting steel band cannot skid, according to elevator standard, no matter which kind of reason of elevator is trapped in hoistway, should allow steel rope to skid on rope sheave, this kind of structure cannot realize skids, therefore, its application is very limited.In addition, manufacturing this kind of concaveconvex shape, to promote the cost of steel band higher compared with common platypelloid type steel band.
As the application number Chinese patent that is 200780100831.4, although its two sides is also provided with circular arc spigot surface, but because its arc surface is to steel band inner recess, thickness of strips is increased progressively to both sides by center position, its leading sheave or traditional drum type structure, because the inevitable defect of drum type structure is exactly middle stressed bigger than normal, stressed inconsistent, and at its thickness of the position of the stressed maximum in centre, be but minimum at steel band, therefore, cracking in the middle of steel band, easily ftractures, once cannot lead.
The Chinese patent that and for example application number is 200810120635.X, its steel band two sides is provided with a plurality of arc surfaces (the corresponding arc surface of per share steel wire), this design and polywedge bet or there is identical defect with the steel band of male and fomale(M&F), be the area of contact that has greatly increased steel band and pulley, thereby cause friction coefficient larger, promoting steel band cannot realize and skidding by elevator standard requirement.Moreover, promote steel band two sides a plurality of arc surfaces are set, it requires also to arrange on pulley a plurality of arc surfaces of correspondence, requirement on machining accuracy for pulley is very high, the making accuracy requirement of a plurality of circular arcs that simultaneously promotes steel band is also very high, once it is inadequate to promote the arc accuracy of steel band and pulley, owing to promoting steel band, by multistrand rope, formed and be connected, will cause promoting steel band and occur multi-point constraint, caused the situation of constraint, between each circular arc, form and pull, easily cause promoting steel band wearing and tearing aggravation and because discontinuity produces cracking.
Summary of the invention
For addressing the above problem, the purpose of this utility model is to provide a kind of lifting steel band that can realize enhanced feature, has avoided a plurality of spigot surfaces to cause friction coefficient problem excessive and that excessively retrain, more reasonable in structure, promotes steel band strained condition better.
Another object of the present utility model is to provide the elevator hoist system that includes above-mentioned lifting steel band, promote steel band can be in pulley groove smooth running, prevent from promoting the migration of steel band left and right and sideslip, can not affect again the service life that promotes steel band, more reasonable in structure, promote steel band strained condition better.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of lifting steel band, by multistrand rope and by each steel rope parcel all-in-one-piece integument, form, it is characterized in that: described lifting steel band only forms respectively a cylindrical spigot surface parallel with promoting steel band length direction in both sides.
The center of circle of described cylindrical spigot surface is positioned on the line of centers that promotes thickness of strips.
The double-edged roughness of described lifting steel band is identical or different; Or tow sides are provided with identical or different minimizing and promote the groove that steel band can area of contact; Or, promote steel band and only at the tow sides of cylindrical spigot surface, identical or different roughness be set, or only on cylindrical spigot surface tow sides, be provided with identical or different minimizing and promote the groove that steel band can area of contact.
Described lifting steel band the widest part and ratio >=2 in thickness, the diameter of cylindrical spigot surface is 1.1～2 with the width ratio that promotes steel band mid-plane part.
A kind of elevator hoist system, comprise above-mentioned lifting steel band and pulley matching used with it, pulley is provided with the guide groove caving inward, the position of this guide groove bottom land both sides corresponding circle cylindricality spigot surface is provided with arc groove, and the arc radius of arc groove mates with the arc radius of cylindrical spigot surface.
The width of described guide groove is identical with lifting width of steel band, or is greater than lifting steel band but is no more than 5mm.
Described pulley is the traction sheave, track adjusting wheel, crosshead sheave, sedan-chair return pulley of elevator or at least one in roller.
Described lifting steel band is walked around the crosshead sheave of elevator or sedan-chair return pulley, track adjusting wheel, traction sheave and successively to roller, promote the less one side of steel band roughness and fit with traction sheave, the another side that roughness is larger and crosshead sheave or sedan-chair return pulley, track adjusting wheel and roller is fitted; Or, promote steel band and establish fluted can the less one side of area of contact laminating with traction sheave, can area of contact more another side and crosshead sheave or sedan-chair return pulley, track adjusting wheel and roller is fitted.
Described guide groove two side is formed slopely respectively inclined flange laterally.
The utility model is by arranging respectively cylindrical spigot surface in lifting steel band both sides, avoid occurring that a plurality of spigot surface friction coefficient are large and cross the problem of constraint, not only can realize and promote steel band automatic centering, guarantee to promote steel band smooth running in guide groove, avoided promoting the deviation phenomenon of steel band completely, but also improve the strained condition that promotes steel band, and extend its service life, reduce vibration and noise simultaneously.Owing to promoting on steel band, through specially designed spigot surface, can make to promote steel band automatic centering, prevent its sideslip or deviate from, in the time of actual installation, only need put in corresponding pulley groove promoting steel band, without accurately carrying out centering, compare with other grooveds, there is very large advantage, lifting steel belt deviation problem and unbalance stress problem have been solved on the one hand, also solved on the other hand and to have adopted concaveconvex shape to promote the excessive and problem that can not skid of steel band or polywedge bet and pulley friction coefficient, really be applicable to the long-time running of elevator, when having simplified the mounting process of elevator, guarantee to promote the service life of steel band.
Accompanying drawing explanation
Fig. 1 is the force analysis figure that promotes the drum type groove of steel band and pulley in prior art;
Fig. 2 is concave slot and the force analysis figure that promotes steel band and pulley in prior art;
Fig. 3 A, Fig. 3 B are respectively cross sectional drawing and the block diagrams that the utility model promotes steel band;
Fig. 4 is the figure that coordinates that the utility model promotes steel band and pulley;
Fig. 5 is the A portion enlarged drawing of Fig. 4;
Fig. 6 is the B portion enlarged drawing of Fig. 4;
Fig. 7 is the utility model elevator traction system schematic diagram.
The specific embodiment
As shown in Fig. 3 A, Fig. 3 B, the utility model is a kind of lifting steel band 22, by multistrand rope arranged side by side 33 and by each steel rope 33 parcel all-in-one-piece integuments 44, forms.Integument 44 is rubber, plastics or other composite material.Described lifting steel band 22 only forms respectively a cylindrical spigot surface 88 parallel with promoting steel band 22 length directions in both sides, make to promote and on each face of steel band 22 pros and cons, all have two and only have two spigot surfaces, so both can avoid occurring that a plurality of spigot surface friction coefficient were large and cross the problem of constraint, the lifting steel band (as polywedge bet) that can avoid again occurring monolateral spigot surface will turn over the problem of turnback while walking around traction sheave.
Preferably, the center of circle of cylindrical spigot surface 88 is positioned on the line of centers that promotes steel band 22 thickness, makes cylindrical spigot surface 88 to promote the line of centers symmetry of steel band 22 thickness.The roughness that promotes the tow sides (or only at tow sides of cylindrical spigot surface 88) of steel band 22 can be identical or different; Or the tow sides (or only at tow sides of cylindrical spigot surface 88) that promote steel band 22 are upper can be provided with the groove that identical or different minimizing lifting steel band can area of contact, thereby reaches desired friction coefficient.
Preferably, promote ratio >=2 in steel band 22 the widest part and thickness, it is stressed more even in order to make to promote steel band 22 that larger flakiness ratio is set.The diameter of cylindrical spigot surface 88 is 1.1～2 with the width ratio that promotes steel band 22 mid-plane parts, and the words that ratio is too little cannot form spigot surface, if too large, can cause the position of cylindrical spigot surface 88 blocked up, are unfavorable for promoting the bending of steel band 22.
A kind of elevator hoist system of the present utility model, comprises above-mentioned lifting steel band 22 and pulley matching used with it, the traction sheave that pulley is elevator, track adjusting wheel, crosshead sheave, sedan-chair return pulley or at least one in roller.Pulley is provided with the guide groove 8 caving inward, and the position of these guide groove 8 bottom land both sides corresponding circle cylindricality spigot surfaces 88 is provided with arc groove 83, and the arc radius of arc groove 83 mates with the arc radius of cylindrical spigot surface 88.Preferably, the width of guide groove 8 is identical with lifting steel band 22 width, or is greater than lifting steel band 22 but is no more than 5mm, avoids promoting steel band 22 left and right skews.As shown in Figure 7, promote steel band 22 walk around successively the crosshead sheave 71 of elevator or sedan-chair return pulley, track adjusting wheel (if any words), traction sheave 72 and to roller 74, now promote steel band 22 and can not fit with other pulley with the one side of traction sheave 72 laminatings, the tow sides that promote steel band 22 lead separately.Preferably, promote one side and traction sheave 72 laminatings that in steel band 22, roughness is less, the another side that roughness is larger and other pulleys (as crosshead sheave or sedan-chair return pulley, track adjusting wheel with to roller) laminating, or, promote steel band 22 establish fluted can less one side and traction sheave 72 laminatings of area of contact, can area of contact more another side and other pulleys (as crosshead sheave or sedan-chair return pulley, track adjusting wheel with to roller) are fitted; Simultaneously on traction sheave 72, also corresponding roughness height can be set, make to promote the function of skidding that steel band 22 can be realized elevator standard requirement, make again to promote between steel band 22 and traction sheave 72 more wear-resisting, improve 22 service lifes of lifting steel band.
As shown in Fig. 3 A, 3B, promote the middle uniform steel rope side by side 33 of steel band 22, be around packing material 44, width can be W=30mm, and mid-plane segment thickness can be H=3mm, and cylindrical spigot surface 88 diameters are D=5mm, radius is R=2.5mm, flakiness ratio W/D=6 >=2.Cylindrical spigot surface 88 exceeds mid-plane part and should be arranged in 0.5～1.5mm as far as possible, in the present embodiment, cylindrical spigot surface 88 exceeds the height h=1mm of mid-plane part, so formed the cylindrical spigot surface 88 that promotes steel band 22, promote steel band mid-plane part and still keep straight, main bearing surface 77 in the middle of forming.In order to reduce concentrating of stress, between spigot surface 88 and bearing surface 77, pass through circular arc 66 transition, its radius R 1=2mm.
As shown in Figure 4, the present embodiment is crosshead sheave 1 with the leading sheave that lifting steel band 22 is used in conjunction with.Crosshead sheave 1 two ends are provided with bearing 2, for crosshead sheave 1 is arranged on to sedan-chair head piece.Crosshead sheave 1 is provided with a plurality of guide grooves 8.
As shown in Figure 5,6, guide groove 8 is groove, the position of bottom land both sides corresponding circle cylindricality spigot surface 88 is provided with arc groove 83, can make to promote steel band 22 automatic centerings, guarantee to promote steel band 22 smooth running in guide groove 8, avoided promoting the deviation phenomenon of steel band 22 completely, order is stressed evenly to promoting steel band 22 again simultaneously, can not cause because local pressure is excessive cracking.
Preferably, the bottom land 81 of guide groove 8 is straight, the sidewall 82 of both sides is formed slopely respectively inclined flange laterally, and sidewall 82 passes through arc groove 83 transition with bottom land 81, arc groove 83 has and only has two, the arc radius of arc groove 83 is R2=2.5mm, circular arc camber h2=1mm, consistent with ball-type spigot surface 88 shapes that promote steel band 22, between arc groove 83 and bottom land 81, for reducing stress, concentrate simultaneously, transition arc 84 is set, its radius is R3=2mm, with other pulley structures such as the structures such as arc surface or convex surface are compared, more reasonable in structure, promote steel band 22 strained conditiones better.Secondly, the sidewall 82 of guide groove 8 and the angle α > of bottom land 81 planes are 95 °.
Preferably, the circular shape of arc groove 83 is consistent with lifting steel band spigot surface 88.In the present embodiment, arc groove 83 fits like a glove with the spigot surface that promotes steel band 22.Owing to promoting, the cylindrical spigot surface 88 of steel band 22 is identical with the circular shape of arc groove 83, make to it's time to promote steel band 22 sideslips, under the effect of both sides arc surface, all the time lifting steel band 22 is maintained to midway location, greatly reduced to promote the inertia of steel band 22 left and right migration in guide groove 8, also reduced to promote the friction of steel band 22 and two side 82, realize and promote the steadily object of guiding of steel band 22 simultaneously.Preferably, the depth H 2 of guide groove 8 is more than or equal to 2mm, promotes steel band 22 and can not skid off guide groove, has fully guaranteed its guiding.
In the present embodiment, crosshead sheave 1 is provided with a plurality of guide grooves 8.A plurality of guide grooves 8 adopt identical grooved.The flange 3 that is not less than 3mm by thickness between guide groove 8 between two separates, and flange 3 forms the sidewall 82 of guide grooves 8.
Promoting steel band 22 both sides is cylindrical spigot surface 88, after installing, promoting steel band 22 is limited in guide groove 8 completely, coordinating of the arc surface of the arc surface of cylindrical spigot surface 88 and guide groove 8 arc grooves 83, making to promote steel band 22 can sideslip, each promotes between steel band 22 can overlappingly not interfere yet, each comfortable corresponding interior operation of guide groove 8.
As shown in Figure 7, described lifting steel band 22 is walked around crosshead sheave 71(or the sedan-chair return pulley of elevator successively), track adjusting wheel is (as sometimes, this example nothing), traction sheave 72 and to roller 74, wherein promoting steel band 22 can not fit with other pulley with the one side D face of traction sheave 72 laminatings, can not fit with traction sheave 72 with the C face of other pulley laminating, because the cylindrical spigot surface 88 that promotes steel band 22 is with mid-depth line symmetry, make the tow sides that promote steel band 22 both sides all with arc surface, the steel band (as polywedge bet) of avoiding occurring monolateral spigot surface will turn over the problem of turnback while walking around traction sheave 72.Less roughness can be set as required or the area that groove minimizing D face can be fitted with traction sheave 72 is set with the D face of traction sheave 72 laminatings, by above-mentioned setting, reach and meet the needed friction coefficient of operating needs.
By description of listed embodiment, basic conception of the present utility model and groundwork have been set forth.But the utility model is not limited to above-mentioned listed embodiment.
Claims (9)
1. a lifting steel band forms by multistrand rope and by each steel rope parcel all-in-one-piece integument, it is characterized in that: described lifting steel band only forms respectively a cylindrical spigot surface parallel with promoting steel band length direction in both sides.
2. lifting steel band according to claim 1, is characterized in that: the center of circle of described cylindrical spigot surface is positioned on the line of centers that promotes thickness of strips.
3. lifting steel band according to claim 1, is characterized in that: the double-edged roughness of described lifting steel band is identical or different; Or tow sides are provided with identical or different minimizing and promote the groove that steel band can area of contact; Or, promote steel band and only at the tow sides of cylindrical spigot surface, identical or different roughness be set, or only on cylindrical spigot surface tow sides, be provided with identical or different minimizing and promote the groove that steel band can area of contact.
4. lifting steel band according to claim 1, is characterized in that: described lifting steel band the widest part and ratio >=2 in thickness, the diameter of cylindrical spigot surface is 1.1～2 with the width ratio that promotes steel band mid-plane part.
5. an elevator hoist system, it is characterized in that comprising and in claim 1-4, described in arbitrary claim, promote steel band and pulley matching used with it, pulley is provided with the guide groove caving inward, the position of this guide groove bottom land both sides corresponding circle cylindricality spigot surface is provided with arc groove, and the arc radius of arc groove mates with the arc radius of cylindrical spigot surface.
6. elevator hoist system according to claim 5, is characterized in that: the width of described guide groove is identical with lifting width of steel band, or is greater than lifting steel band but is no more than 5mm.
7. elevator hoist system according to claim 5, is characterized in that: the traction sheave that described pulley is elevator, track adjusting wheel, crosshead sheave, sedan-chair return pulley or at least one in roller.
8. elevator hoist system according to claim 5, it is characterized in that: described lifting steel band is walked around the crosshead sheave of elevator or sedan-chair return pulley, track adjusting wheel, traction sheave and successively to roller, promote the less one side of steel band roughness and fit with traction sheave, the another side that roughness is larger and crosshead sheave or sedan-chair return pulley, track adjusting wheel and roller is fitted; Or, promote steel band and establish fluted can the less one side of area of contact laminating with traction sheave, can area of contact more another side and crosshead sheave or sedan-chair return pulley, track adjusting wheel and roller is fitted.
9. elevator hoist system according to claim 5, is characterized in that: described guide groove two side is formed slopely respectively inclined flange laterally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320533989.3U CN203486710U (en) | 2013-08-29 | 2013-08-29 | Hoisting steel strip and elevator hoisting system comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320533989.3U CN203486710U (en) | 2013-08-29 | 2013-08-29 | Hoisting steel strip and elevator hoisting system comprising same |
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| Publication Number | Publication Date |
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| CN203486710U true CN203486710U (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320533989.3U Expired - Lifetime CN203486710U (en) | 2013-08-29 | 2013-08-29 | Hoisting steel strip and elevator hoisting system comprising same |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104760861A (en) * | 2015-04-13 | 2015-07-08 | 恒达富士电梯有限公司 | Special guide wheel used for steel belt elevator |
| CN104930120A (en) * | 2015-06-26 | 2015-09-23 | 苏州莱茵电梯制造有限公司 | Offset prevention steel belt of elevator traction machine and traction wheel applied to same |
| CN105347136A (en) * | 2015-11-23 | 2016-02-24 | 江苏赛福天钢索股份有限公司 | Abrasion-resisting lifting piece for elevator |
| CN109179148A (en) * | 2018-10-29 | 2019-01-11 | 叶荣伟 | A kind of pulley and the elevator hoisting systems comprising the pulley |
| DE102022125706A1 (en) | 2022-10-05 | 2023-12-14 | Tk Elevator Innovation And Operations Gmbh | Drive train arrangement for a belt drive unit of an elevator system as well as the corresponding shaft and its use |
| DE102022125720A1 (en) | 2022-10-05 | 2024-04-11 | Tk Elevator Innovation And Operations Gmbh | Drive train arrangement for a belt drive unit of an elevator system as well as correspondingly designed shaft and its use |
-
2013
- 2013-08-29 CN CN201320533989.3U patent/CN203486710U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104760861A (en) * | 2015-04-13 | 2015-07-08 | 恒达富士电梯有限公司 | Special guide wheel used for steel belt elevator |
| CN104930120A (en) * | 2015-06-26 | 2015-09-23 | 苏州莱茵电梯制造有限公司 | Offset prevention steel belt of elevator traction machine and traction wheel applied to same |
| CN105347136A (en) * | 2015-11-23 | 2016-02-24 | 江苏赛福天钢索股份有限公司 | Abrasion-resisting lifting piece for elevator |
| CN105347136B (en) * | 2015-11-23 | 2018-09-18 | 江苏赛福天钢索股份有限公司 | A kind of wear-resisting lifting piece of elevator |
| CN109179148A (en) * | 2018-10-29 | 2019-01-11 | 叶荣伟 | A kind of pulley and the elevator hoisting systems comprising the pulley |
| DE102022125706A1 (en) | 2022-10-05 | 2023-12-14 | Tk Elevator Innovation And Operations Gmbh | Drive train arrangement for a belt drive unit of an elevator system as well as the corresponding shaft and its use |
| DE102022125720A1 (en) | 2022-10-05 | 2024-04-11 | Tk Elevator Innovation And Operations Gmbh | Drive train arrangement for a belt drive unit of an elevator system as well as correspondingly designed shaft and its use |
| WO2024074346A1 (en) | 2022-10-05 | 2024-04-11 | Tk Elevator Innovation And Operations Gmbh | Drive train assembly for a belt drive unit of a lift system and correspondingly designed shaft and use thereof |
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