CN105114427A - Intelligent autorotation electric control screw - Google Patents
Intelligent autorotation electric control screw Download PDFInfo
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- CN105114427A CN105114427A CN201510454699.3A CN201510454699A CN105114427A CN 105114427 A CN105114427 A CN 105114427A CN 201510454699 A CN201510454699 A CN 201510454699A CN 105114427 A CN105114427 A CN 105114427A
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- screw
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- autorotation
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Abstract
The invention relates to an intelligent autorotation electric control screw which comprises a screw body (1), and a screw cap (7) fixedly arranged at the top end of the screw body (1), and further comprises a fixed clamp ring (4), at least one location rod (5), a control module (8), an external power module (2), a rotation motor (3) and a distance measurement sensor (9), wherein the external power module (2), the rotation motor (3) and the distance measurement sensor (9) are connected with the control module (8); based on the designed technical scheme, the above structures are connected and mounted to form the intelligent autorotation electric control screw; an electric control structure is designed based on the existing screw structure; the rotation motor (3) is introduced; the location rods (5) are further designed to overcome autorotation of the rotation motor (3); autorotation mounting operation of the screw and real-time self-tightening operation detection are achieved; a narrow mounting space and loosening are effectively responded; and the working efficiency in actual application is greatly improved.
Description
Technical field
The present invention relates to
oneplant the automatically controlled screw of intelligent autorotation, belong to intelligent technical field of hardware.
Background technique
Screw utilizes the inclined-plane circular rotating of object and the physics of frictional force and mathematical principle, the by easy stages instrument of fastening implements workpiece, screw is industrial necessity indispensable in daily life: the minimum screw used as photographic camera, glasses, clock and watch, electronics etc., the general screw of TV, electric product, musical instrument, furniture etc., large-scale screw, nut is then used as engineering, building, bridge, traffic tool, aircraft, electric car, automobile etc. then sized by screw using, screw industrially bears vital task, as long as the earth also exists industry, then the function of screw is forever important, screw is the joint invention over the past thousands of years in people's productive life, according to application, it is the first invention of the mankind, and along with the continuous progress of scientific and technological level, for the reformed AHP also variation day by day of screw, the such as patent No.: 201010543313.3, disclose a kind of screw, it includes a body of rod, the one spiral shell head being located at this body of rod one end, the one brill lock section being located at this body of rod the other end, and the thread on this body of rod is located at by plural whorl, it is mainly the cutting face this brill lock section being formed with two inclinations, and this connecting part, two cutting face is formed with a cutting edge, and the plural number thread be located on this body of rod extends to this cutting edge simultaneously, and connects with a wherein ora terminalis of this cutting edge, time sealed, the channel of chip removal that chip can enter between thread smoothly through this two cutting face tilted is got rid of fast, so the phenomenon that a large amount of chip is hoarded can not be caused, the sealed torsion of effective reduction and the sealed speed of lifting, after simultaneously sealed, this screw is deeply buried in sealed object, is conducive to these sealed objects follow-up and connect the carrying out of construction.
Also has number of patent application: 201210579040.7, disclose a kind of screw, comprise screw terminal, from the spiro rod section that described screw terminal extends to form downwards, described spiro rod section comprises the screw section on the body of rod and some outer rims being formed at the described body of rod that extend to form from described screw terminal downwards, described screw also comprises from described spiro rod section to downward-extension and diameter is less than the chip ejection segment thereupon of described spiro rod section diameter, described chip ejection segment thereupon comprises the chip removal bar portion extended to form from the described body of rod downwards, chip removal screw thread in some outer rims being formed at described chip removal bar portion, and the groove be formed between adjacent chip removal screw thread, described spiro rod section also comprises at least one and extends also cutting at the chip removal extending groove of described spiro rod section by groove towards described spiro rod section, this screw structural is simple, easy to use, be convenient to the installation of screw thread.
Moreover, number of patent application: 201410462333.6, disclose a kind of screw, the spiro rod section comprising screw terminal and extend to form downwards from screw terminal, spiro rod section comprises the body of rod and some tooth portions being formed at the outside of the body of rod that extend to form from screw terminal downwards, screw terminal comprises screw terminal main body and is arranged at the startup plane of screw terminal main body one end, and be provided with flight in screw terminal, the cross section of flight has the enclosed construction be made up of five " several " font double wedges connected in turn; The cross section of the flight of technique scheme design has the enclosed construction be made up of five " several " font double wedges connected in turn, it has taken into full account stress effect, make grooved have higher torque transmitting characteristic can not cause when fastening again stress concentrate radial force, thus achieve 0 real ゜ driving angle, eliminate radial force, improve the drive performance of thread, thus extend the working life of instrument, save artificial cost.
As can be seen from the screw of prior art, artificer has stable structure, more firm fixed effect more to make screw, much useful improvement suggestion is proposed, but, from screw actual make for, existing screw still also also exists some unavoidable problems, such as in some narrow spaces, the just application of very inconvenient screw, no matter be aim at screw placing screws, still turn screw to install, all very inconvenient; Moreover, As time goes on, easily there is loosening phenomenon in some screws, will have influence on like this its stability between workpiece is installed, this just needs staff's moment to check, needs to arrange more manpower on the one hand, on the other hand for narrow space, operator not only check difficulty, equally again rotate installation, also can be very difficult.
Summary of the invention
For above-mentioned technical problem, technical problem to be solved by this invention is to provide a kind of based on electric control structure, introduce rotary electric machine, and combine the distance measuring sensor of design, conveniently can not only realize screw to install, and can detect in real time for screw state, intelligent operation, ensure the automatically controlled screw of intelligent autorotation of screw tightening degree.
The present invention is in order to solve the problems of the technologies described above by the following technical solutions: the present invention devises the automatically controlled screw of a kind of intelligent autorotation, comprises screw body, and is fixedly installed on the screw cap on screw body top; Also comprise fixing snap ring, at least one positioning rod, a control module and be connected with control module respectively ABAP Adapter module, rotary electric machine, distance measuring sensor; Wherein, ABAP Adapter module is respectively rotary electric machine through control module, distance measuring sensor is powered; The drive end of rotary electric machine is fixedly connected with the top of screw cap, and the axis collinear of the axis of rotary electric machine and screw body; Distance measuring sensor is embedded in the lower surface of screw cap, and the range finding end of distance measuring sensor is mutually concordant with the lower surface of screw cap, and the range finding direction of distance measuring sensor and the axis of screw body point to the below of screw cap with paralleling; Fixing snap ring is fixedly installed on the fuselage of rotary electric machine, the side of fixing snap ring is fixedly installed at least one extension rod, the quantity of extension rod is equal with the quantity of positioning rod, each extension rod is arranged respectively a through hole, each positioning rod is each passed through the through hole on each extension rod, and each positioning rod parallels with the axis of screw body, rotary electric machine is sliding along each positioning rod place rectilinear direction with fixing snap ring.
As a preferred technical solution of the present invention: described in be fixedly installed on each extension rod on fixing snap ring side, respectively with the axis perpendicular of described rotary electric machine.
As a preferred technical solution of the present invention: the quantity of described positioning rod is two, the side of described fixing snap ring is fixedly installed two extension rods, and two extension rods are coplanar each other.
As a preferred technical solution of the present invention: described rotary electric machine is miniature rotary electric machine.
As a preferred technical solution of the present invention: described miniature rotary electric machine is miniature brushless rotary motor.
As a preferred technical solution of the present invention: described distance measuring sensor is infrared distance sensor.
As a preferred technical solution of the present invention: described control module is single-chip microcomputer.
The automatically controlled screw of the intelligent autorotation of one of the present invention adopts above technological scheme compared with prior art, has following technique effect:
(1) the automatically controlled screw of intelligent autorotation of the present invention's design, improve based on existing screw structural basis, design electric control structure, introduce rotary electric machine, and the rotation of rotary electric machine is overcome in conjunction with Design Orientation bar, achieve the convenient installation for screw, overcome existing narrow space and be unfavorable for the problem that screw is installed, be applicable to any installation conditions, substantially increase the working efficiency in practical application; And introduce distance measuring sensor, after completing screw installation, detect in real time for screw and the degree of tightening that is fixed between workpiece, and based on real-time testing result, further control rotary electric machine work, the degree of tightening that moment keeps screw and is fixed between workpiece, effectively ensure that the automatically controlled screw of intelligent autorotation stability in actual applications designed by the present invention;
(2) in the automatically controlled screw of intelligent autorotation that the present invention designs, for each extension rod be fixedly installed on fixing snap ring side, further design its respectively with the axis perpendicular of rotary electric machine, based on lever principle, substantially increase the working efficiency that positioning rod overcomes rotary electric machine rotation, make rotary electric machine can have more powerful service behaviour for screw rotating operation; And for positioning rod and extension rod, the quantity of further Design Orientation bar is two, the side of fixing snap ring is fixedly installed two extension rods, and two extension rods are coplanar each other, make the present invention design the automatically controlled screw of intelligent autorotation while having stable rotation function, greatly reduce cost of production;
(3) in the automatically controlled screw of intelligent autorotation that the present invention designs, for rotary electric machine, further design adopts miniature rotary electric machine, greatly can control the spatial volume of introduced electric control structure, control the overall volume of the designed automatically controlled screw of intelligent autorotation to greatest extent, ensure that the convenience of each side in practical application; And for miniature rotary electric machine, further design adopts miniature brushless rotary motor, make the automatically controlled screw of intelligent autorotation designed by the present invention in practical work process, quiet work can be realized, both ensure that the designed automatically controlled screw of intelligent autorotation had stable rotation function, can ensure that again its working procedure does not produce noise, embodies the human oriented design in design process;
(4) in the automatically controlled screw of intelligent autorotation that the present invention designs, for distance measuring sensor, further design adopts infrared distance sensor, the situation that light environment is bad can be successfully managed, obtain Real-time Monitoring Data more accurately, effectively ensure that the stability in the automatically controlled screw real work of intelligent autorotation designed by the present invention further; And for control module (8), design adopts single-chip microcomputer further, and can be applicable to the expansion demand of later stage for the automatically controlled screw of intelligent autorotation on the one hand, on the other hand, succinct control architecture mode can be convenient to the maintenance in later stage.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention designs the automatically controlled screw of intelligent autorotation.
Wherein, 1. screw body, 2. ABAP Adapter module, 3. rotary electric machine, 4. fixing snap ring, 5. positioning rod, 6. extension rod, 7. screw cap, 8. control module, 9. distance measuring sensor.
Embodiment
Be described in further detail for the specific embodiment of the present invention below in conjunction with Figure of description.
As shown in Figure 1, the automatically controlled screw of one intelligence autorotation of the present invention's design, comprises screw body 1, and is fixedly installed on the screw cap 7 on screw body 1 top; Also comprise fixing snap ring 4, at least one positioning rod 5, control module 8 and be connected with control module 8 respectively ABAP Adapter module 2, rotary electric machine 3, distance measuring sensor 9; Wherein, ABAP Adapter module 2 is respectively rotary electric machine 3 through control module 8, distance measuring sensor 9 is powered; The drive end of rotary electric machine 3 is fixedly connected with the top of screw cap 7, and the axis collinear of the axis of rotary electric machine 3 and screw body 1; Distance measuring sensor 9 is embedded in the lower surface of screw cap 7, and the range finding end of distance measuring sensor 9 is mutually concordant with the lower surface of screw cap 7, and the range finding direction of distance measuring sensor 9 and the axis of screw body 1 point to the below of screw cap 7 with paralleling; Fixing snap ring 4 is fixedly installed on the fuselage of rotary electric machine 3, the side of fixing snap ring 4 is fixedly installed at least one extension rod 6, the quantity of extension rod 6 is equal with the quantity of positioning rod 5, each extension rod 6 is arranged respectively a through hole, each positioning rod 5 is each passed through the through hole on each extension rod 6, and each positioning rod 5 parallels with the axis of screw body 1, rotary electric machine 3 is sliding along each positioning rod 5 place rectilinear direction with fixing snap ring 4.The automatically controlled screw of intelligent autorotation of technique scheme design, improve based on existing screw structural basis, design electric control structure, introduce rotary electric machine 3, and the rotation of rotary electric machine 3 is overcome in conjunction with Design Orientation bar 5, achieve the convenient installation for screw, overcome existing narrow space and be unfavorable for the problem that screw is installed, be applicable to any installation conditions, substantially increase the working efficiency in practical application; And introduce distance measuring sensor 9, after completing screw installation, detect in real time for screw and the degree of tightening that is fixed between workpiece, and based on real-time testing result, further control rotary electric machine 3 works, the degree of tightening that moment keeps screw and is fixed between workpiece, effectively ensure that the automatically controlled screw of intelligent autorotation stability in actual applications designed by the present invention.
On basis based on the automatically controlled screw technological scheme of above-mentioned design intelligence autorotation, the present invention also devises following optimal technical scheme further: for each extension rod 6 be fixedly installed on fixing snap ring 4 side, further design its respectively with the axis perpendicular of rotary electric machine 3, based on lever principle, substantially increase the working efficiency that positioning rod 5 overcomes rotary electric machine 3 rotation, make rotary electric machine 3 can have more powerful service behaviour for screw rotating operation, and for positioning rod 5 and extension rod 6, the quantity of further Design Orientation bar 5 is two, the side of fixing snap ring 4 is fixedly installed two extension rods 6, and two extension rods 6 are coplanar each other, make the present invention design the automatically controlled screw of intelligent autorotation while having stable rotation function, greatly reduce cost of production, and, for rotary electric machine 3, design adopts miniature rotary electric machine further, greatly can control the spatial volume of introduced electric control structure, control the overall volume of the designed automatically controlled screw of intelligent autorotation to greatest extent, ensure that the convenience of each side in practical application, moreover, for miniature rotary electric machine, further design adopts miniature brushless rotary motor, make the automatically controlled screw of intelligent autorotation designed by the present invention in practical work process, quiet work can be realized, both ensure that the designed automatically controlled screw of intelligent autorotation had stable rotation function, can ensure that again its working procedure does not produce noise, embody the human oriented design in design process, and, for distance measuring sensor 9, further design adopts infrared distance sensor, the situation that light environment is bad can be successfully managed, obtain Real-time Monitoring Data more accurately, effectively ensure that the stability in the automatically controlled screw real work of intelligent autorotation designed by the present invention further, and for control module 8, design adopts single-chip microcomputer further, and can be applicable to the expansion demand of later stage for the automatically controlled screw of intelligent autorotation on the one hand, on the other hand, succinct control architecture mode can be convenient to the maintenance in later stage.
The present invention designs the automatically controlled screw of a kind of intelligent autorotation in the middle of actual application, comprises screw body 1, and is fixedly installed on the screw cap 7 on screw body 1 top; Also comprise fixing snap ring 4, two positioning rods 5, single-chip microcomputer and be connected with single-chip microcomputer respectively ABAP Adapter module 2, miniature brushless rotary motor, infrared distance sensor; Wherein, ABAP Adapter module 2 is respectively miniature brushless rotary motor through single-chip microcomputer, infrared distance sensor powers; The drive end of miniature brushless rotary motor is fixedly connected with the top of screw cap 7, and the axis collinear of the axis of miniature brushless rotary motor and screw body 1; Infrared distance sensor is embedded in the lower surface of screw cap 7, and the range finding end of infrared distance sensor is mutually concordant with the lower surface of screw cap 7, and the range finding direction of infrared distance sensor and the axis of screw body 1 point to the below of screw cap 7 with paralleling; Fixing snap ring 4 is fixedly installed on the fuselage of miniature brushless rotary motor, the side of fixing snap ring 4 is fixedly installed two extension rods 6, and two extension rods 6 is coplanar each other, each extension rod 6 respectively with the axis perpendicular of miniature brushless rotary motor; Each extension rod 6 is arranged respectively a through hole, each positioning rod 5 is each passed through the through hole on each extension rod 6, and each positioning rod 5 parallels with the axis of screw body 1, miniature brushless rotary motor is sliding along each positioning rod 5 place rectilinear direction with fixing snap ring 4.In practical application, screw body 1 bottom of the automatically controlled screw of designed intelligent autorotation is aimed at the mounting hole be fixed on workpiece and is placed by operator, then operator fix the top of positioning rod 5 with hand, prevent positioning rod 5 from rocking, then operator send control command through single-chip microcomputer to miniature brushless rotary motor, control miniature brushless rotary motor to start working, owing to fixing snap ring 4 between positioning rod 5 and miniature brushless rotary motor, the structural relation of extension rod 6, miniature brushless rotary motor is in drive end rotation work process, rotation can not be there is, like this, screw body 1 is under the effect of miniature brushless rotary motor drive end, rotate in the mounting hole be fixed on workpiece, and because miniature brushless rotary motor is sliding along each positioning rod 5 place rectilinear direction with fixing snap ring 4, therefore, when screw body 1 rotates in the mounting hole be fixed on workpiece, miniature brushless rotary motor moving and be moved also with screw body 1, when screw body 1 is rotated into after in the mounting hole be fixed on workpiece, the upper surface of the bottom of positioning rod 5 with the workpiece that is fixed is fixed by operator on the one hand, keeps the position of positioning rod 5 to fix, send control command through single-chip microcomputer to infrared distance sensor on the other hand, control infrared distance sensor and start real-time working, and real time distance result is uploaded in the middle of single-chip microcomputer, now, the lower surface of screw body 1 top screw cap 7 and the upper surface close contact of the workpiece that is fixed, because infrared distance sensor is embedded in the lower surface of screw cap 7, the range finding end of infrared distance sensor is mutually concordant with the lower surface of screw cap 7, and the range finding direction of infrared distance sensor and the axis of screw body 1 point to the below of screw cap 7 with paralleling, therefore, range measurement now detected by infrared distance sensor is 0, then single-chip microcomputer is after acquisition is the range measurement of 0, does not do any further operation, As time goes on, the screw be fixed if be arranged on workpiece occurs to loosen, i.e. screw cap 7 and be fixed when to there is gap between workpiece surface, range measurement detected by infrared distance sensor is greater than 0, now, after single-chip microcomputer receives the range measurement being greater than 0, the miniature brushless rotary motor controlling immediately to be attached thereto is started working again, screw body 1 is rotated again, make it to enter further in the screw be fixed on workpiece, until make the lower surface of screw body 1 top screw cap 7 and the upper surface close contact of the workpiece that is fixed, the degree of tightening ensureing screw and be fixed between workpiece, effectively prevent screw and be fixed between workpiece and occur loosening phenomenon.Based on above-mentioned actual application, the automatically controlled screw of intelligent autorotation that the present invention can be adopted to design, realize the autorotation fitting operation of screw, and detect in real time from tightening operation, successfully manage the situation of narrow installing space, and loosening phenomenon, substantially increase the working efficiency in practical application.
Be explained in detail for embodiments of the present invention in conjunction with Figure of description above, but the present invention is not limited to above-mentioned mode of execution, in the ken that those of ordinary skill in the art possess, can also make a variety of changes under the prerequisite not departing from present inventive concept.
Claims (7)
1. the automatically controlled screw of intelligent autorotation, comprises screw body (1), and is fixedly installed on the screw cap (7) on screw body (1) top; It is characterized in that: also comprise fixing snap ring (4), at least one positioning rod (5), a control module (8) and be connected with control module (8) respectively ABAP Adapter module (2), rotary electric machine (3), distance measuring sensor (9); Wherein, ABAP Adapter module (2) is respectively rotary electric machine (3) through control module (8), distance measuring sensor (9) is powered; The drive end of rotary electric machine (3) is fixedly connected with the top of screw cap (7), and the axis collinear of the axis of rotary electric machine (3) and screw body (1); Distance measuring sensor (9) is embedded in the lower surface of screw cap (7), the range finding end of distance measuring sensor (9) is mutually concordant with the lower surface of screw cap (7), and the below of screw cap (7) is pointed to the axis of screw body (1) in the range finding direction of distance measuring sensor (9) with paralleling; Fixing snap ring (4) is fixedly installed on the fuselage of rotary electric machine (3), the side of fixing snap ring (4) is fixedly installed at least one extension rod (6), the quantity of extension rod (6) is equal with the quantity of positioning rod (5), each extension rod (6) is arranged respectively a through hole, each positioning rod (5) is each passed through the through hole on each extension rod (6), and each positioning rod (5) parallels with the axis of screw body (1), rotary electric machine (3) is sliding along each positioning rod (5) place rectilinear direction with fixing snap ring (4).
2. the automatically controlled screw of a kind of intelligent autorotation according to claim 1, is characterized in that: described in be fixedly installed on each extension rod (6) on fixing snap ring (4) side, respectively with the axis perpendicular of described rotary electric machine (3).
3. the automatically controlled screw of a kind of intelligent autorotation according to claim 1 or 2, it is characterized in that: the quantity of described positioning rod (5) is two, the side of described fixing snap ring (4) is fixedly installed two extension rods (6), and two extension rods (6) are coplanar each other.
4. the automatically controlled screw of a kind of intelligent autorotation according to claim 1, is characterized in that: described rotary electric machine (3) is miniature rotary electric machine.
5. the automatically controlled screw of a kind of intelligent autorotation according to claim 4, is characterized in that: described miniature rotary electric machine is miniature brushless rotary motor.
6. the automatically controlled screw of a kind of intelligent autorotation according to claim 1, is characterized in that: described distance measuring sensor (9) is infrared distance sensor.
7. the automatically controlled screw of a kind of intelligent autorotation according to claim 1, is characterized in that: described control module (8) is single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510454699.3A CN105114427A (en) | 2015-07-30 | 2015-07-30 | Intelligent autorotation electric control screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510454699.3A CN105114427A (en) | 2015-07-30 | 2015-07-30 | Intelligent autorotation electric control screw |
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| Publication Number | Publication Date |
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| CN105114427A true CN105114427A (en) | 2015-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201510454699.3A Withdrawn CN105114427A (en) | 2015-07-30 | 2015-07-30 | Intelligent autorotation electric control screw |
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| CN (1) | CN105114427A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106002229A (en) * | 2016-08-05 | 2016-10-12 | 蒋安为 | Automatic screw assembling and disassembling device |
| CN109798293A (en) * | 2017-11-17 | 2019-05-24 | 南宁市富久信息技术有限公司 | A kind of large size Electric nut system of Quick fastening disassembly flange |
| CN114560374A (en) * | 2022-03-15 | 2022-05-31 | 南通中尧特雷卡电梯产品有限公司 | Elevator door vane system with limiting device |
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| EP0203370A1 (en) * | 1985-05-30 | 1986-12-03 | Robert Bosch Gmbh | Screwing device with motor-driven screw driver |
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| CN103498851A (en) * | 2013-10-22 | 2014-01-08 | 无锡俊达测试技术服务有限公司 | Self-testing connecting piece |
| CN204171934U (en) * | 2014-09-26 | 2015-02-25 | 宁波旭升机械有限公司 | A kind of torque sensor |
| JP2015063235A (en) * | 2013-09-25 | 2015-04-09 | Ｊｆｅスチール株式会社 | Method for reinforcing panel component, and panel component reinforced by the same |
| CN104696338A (en) * | 2015-01-15 | 2015-06-10 | 广州中国科学院工业技术研究院 | Fastening bolt with force transducers arranged inside |
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|---|---|---|---|---|
| EP0203370A1 (en) * | 1985-05-30 | 1986-12-03 | Robert Bosch Gmbh | Screwing device with motor-driven screw driver |
| JPH1043970A (en) * | 1996-07-31 | 1998-02-17 | Nitto Seiko Co Ltd | Automatic screw tightener |
| US6021555A (en) * | 1998-02-25 | 2000-02-08 | Leong; Irving | Method of inserting a threaded fastener into a fastening element |
| JP2015063235A (en) * | 2013-09-25 | 2015-04-09 | Ｊｆｅスチール株式会社 | Method for reinforcing panel component, and panel component reinforced by the same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106002229A (en) * | 2016-08-05 | 2016-10-12 | 蒋安为 | Automatic screw assembling and disassembling device |
| CN106002229B (en) * | 2016-08-05 | 2018-02-09 | 长沙理工大学 | A kind of automatic loading and unloading screw device |
| CN109798293A (en) * | 2017-11-17 | 2019-05-24 | 南宁市富久信息技术有限公司 | A kind of large size Electric nut system of Quick fastening disassembly flange |
| CN114560374A (en) * | 2022-03-15 | 2022-05-31 | 南通中尧特雷卡电梯产品有限公司 | Elevator door vane system with limiting device |
| CN114560374B (en) * | 2022-03-15 | 2023-08-29 | 南通中尧特雷卡电梯产品有限公司 | Elevator door vane system with limiting device |
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Application publication date: 20151202 |