CN101648677A - Overload protection devices of hoisting device - Google Patents
Overload protection devices of hoisting device Download PDFInfo
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- CN101648677A CN101648677A CN200810041574A CN200810041574A CN101648677A CN 101648677 A CN101648677 A CN 101648677A CN 200810041574 A CN200810041574 A CN 200810041574A CN 200810041574 A CN200810041574 A CN 200810041574A CN 101648677 A CN101648677 A CN 101648677A
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Abstract
The invention discloses four kinds of overload protection devices of hoisting devices, which aims to provide a series of overload protection devices of the hoisting devices with high accuracy and sensitivity. A basic structure of the invention comprises a proving ring body, a micro switch and an adjusting screw. The micro switch and the adjusting screw are fixed at the two ends of the proving ringthrough a rigid bracket respectively. The contact terminal of the micro switch and a screw head of the adjusting screw point to opposite directions and correspond to each other. When the tensile force is applied to the proving ring at the two ends of the proving ring, the distance between the micro switch and the adjusting screw is reduced. On the basis of the basic structure, a screw hole or a through hole is processed on the proving ring body corresponding to the adjusting screw, so that the tail part of the adjusting screw extends outwards to a structure outside the proving ring body and that an externally-adjusted overload protection device is provided. Meanwhile, by arranging proving ring joints, screw rods and fixed blocks at the two ends of the proving ring based on the two kinds of structures, the invention also provides two kinds of overload protection devices for limiting the moment of a tower crane.
Description
Affiliated technical field
The present invention relates to the safety device of elevator machinery, relate to four kinds of devices that the overload behavior of weight-lifting equipment is limited and protects particularly.
Background technology
At present; elevator machinery and equipment thereof; especially commonly used mechanical type hoisting capacity fender guard on the tower crane; generally all continue to use introduction from smooth (Potain) company of French ripple and improved conventional art, promptly main body dynamometry and control action core are made up of several the micro-switchs of installing on two bow-shaped shrapnels in the proving ring and the shell fragment.Be subjected to the two ends of force direction respectively to be processed with the twice groove in the proving ring, insert two bow-shaped shrapnels and fix with viscose glue, micro-switch and set screw are contained on two bow-shaped shrapnels respectively and are corresponding mutually.When being subjected to external pull, the proving ring distortion, drive that bow-shaped shrapnel is corresponding unfolds distortion, thereby make the distance between micro-switch and the set screw further, when reaching the load limit amount of setting, micro-switch is conditioned screw and pushes up to trigger bit, thereby reaches the purpose of reporting to the police and cutting off hoisting circuit.
Chinese patent publication number CN207029IU, open day is the invention 90203350.6 on January 30th, 1991, this application case discloses a kind of load lifting limiter, is made up of ring body, shell fragment and micro-switch etc.Similar with aforementioned prior art, the technical characterictic of this patent is still, and external pull causes proving ring distortion and drive the bow-shaped shrapnel corresponding deformation, thereby makes micro-switch by the holding screw roof pressure and trigger action.
Because being, the prior art scheme adopt bow-shaped shrapnel that proving ring is transformed into and the path increment that is subjected to the micro-switch action on the force direction vertical direction in the main deformation that is subjected to force direction, and the mode of the crooked assembling of shell fragment be cannot say for sure to demonstrate,prove the micro-switch contact and is aimed at consistent relative with direction of action in line with set screw, cause the deformation quantity conversion efficiency lower, sensitivity and precision are lower, and bow-shaped shrapnel is subject to China's north and south interzone and the obvious temperature difference between the summer in winter and that the cooresponding deformation of expanding with heat and contract with cold takes place is poor, and the easy season cracking of viscose glue even come off, make that all the action and the control of prior art are sensitive inadequately and accurate, stability and reliability are undesirable.
Summary of the invention
The objective of the invention is to overcome known technology and deficiency of the prior art, more high precision and sensitivity are provided, are subjected to variation of ambient temperature to influence little, good stability, overload protection devices of hoisting device that reliability is higher.
For achieving the above object; the invention provides four kinds of overload protection devices; include following technical scheme: comprise the dynamometry ring body; micro-switch and set screw; micro-switch and set screw are fixed on the two ends of proving ring respectively by rigid support; the ailhead direction of the contact of micro-switch and set screw is relative and corresponding one by one; when on the pointing direction of the ailhead of the contact of micro-switch and set screw, proving ring being imposed pulling force at the proving ring two ends; cross and resilient proving ring generation tensile deformation through modifier treatment, the spacing of micro-switch and set screw is then corresponding to diminish.
Overload protection device provided by the invention; when the two ends of proving ring on the pointing direction of the ailhead of the contact of micro-switch and set screw are subjected to external pull and produce ring body deformation; micro-switch is corresponding with the set screw spacing to diminish; arrive predefined specified value of thrust (promptly being generally the hoisting capacity rated value of hoisting crane); the stroke of the ailhead roof pressure micro-switch contact of set screw reaches the degree that triggers micro-switch just, thereby carries out safety protection functions such as warning and outage.
Rigid support of the present invention is meant used rigid material, elastic deformation can not take place under overload protection device normal operation of the present invention, includes but not limited to metallic material, alloy, engineering plastics etc. such as iron and steel.
Described rigid support is connected with the dynamometry ring body, can be welding or the fastening mode of screw, perhaps other any mode that can be fastenedly connected.
The quantity of micro-switch of the present invention is generally 4, but also can be adjusted into other quantity because of the difference of market demand.
First kind of overload protection device provided by the invention, its technical scheme is the set of technique scheme.
Second kind of overload protection device provided by the invention; its technical scheme is: on the basis of the technical scheme of first kind of overload protection device that the invention described above provides; on the cooresponding dynamometry ring body of the adjusting tail end of set screw; be processed with the screw hole that runs through ring body; can use more longer set screw, make the adjusting tail end of set screw stretch out the outer of proving ring body outward, to make things convenient for the user directly on the ring body outer wall, set screw to be adjusted and set needed action load capacity to screw hole.This screw hole can also be the general through hole that runs through ring body.
First kind and second kind of overload protection device provided by the invention, its further characteristics are, can also be as the overload protection of pressure dynamometry type: with the vertical direction of the pointing direction of the ailhead of the contact of micro-switch and set screw on when proving ring being pressed at the proving ring two ends, the spacing of micro-switch and set screw also can diminish; When arriving the rated pressure value of setting, micro-switch is conditioned the ailhead roof pressure trigger action of screw, thereby reaches the purpose of the overload protection of reporting to the police and cutting off the power supply.
The third overload protection device provided by the invention; its technical scheme is: on the basis of the technical scheme of first kind of overload protection device that the invention described above provides; all be connected with the proving ring joint at following in working order two ends of bearing pulling force of proving ring; the short screw that passes through of the proving ring joint of one end connects the near-end fixed block, and the proving ring joint of the other end connects the far-end fixed block by long bolt.This kind overload protection device is particularly suitable for being installed in behind the tower cap of building tower crane on the chord member, is used for restriction and protection to the moment overload of tower crane.
The 4th kind of overload protection device provided by the invention; its technical scheme is: on the basis of the technical scheme of second kind of overload protection device that the invention described above provides; all be connected with the proving ring joint at following in working order two ends of bearing pulling force of proving ring; the proving ring joint of one end connects the near-end fixed block by short screw; the proving ring joint of the other end connects the far-end fixed block by long bolt.This kind overload protection device is particularly suitable for being installed in behind the tower cap of building tower crane on the chord member, is used for restriction and protection to the moment overload of tower crane.
The third and the 4th kind of overload protection device provided by the invention, described long bolt can also be by the screw rod joint long screw rod that is formed by connecting by two sections short screw rods.The benefit of doing like this is to have reduced package length, the inconvenience of having avoided logistics to transport.And described proving ring joint, long bolt and screw rod joint all can also be processed with the little rectangle plane of or several indents, and during for on-site installation, the installer is with spanner power taking, convenient stubborn connect screw rod and assembling.
Compared with the prior art, advantage of the present invention is:
1. the maximum differential of the present invention and prior art, be the spacing change direction of micro-switch and set screw and proving ring the direction that is subjected to external pull in a straight line, make the largest deformation on direction of pull of proving ring almost can absolutely reflect and change into the corresponding variable in distance of micro-switch and set screw, and avoided the loss of the indirect conversion of the ubiquitous deformation quantity of prior art.This makes precision of the present invention and sensitivity be significantly higher than prior art.
2. compared to the bow-shaped shrapnel formula structure of prior art, the rigid support that the present invention adopts more difficultly is subjected to the temperature difference influence that expands with heat and contract with cold in the external world, and therefore, precision is higher, stability and better reliability.
3. avoided bow-shaped shrapnel and proving ring in the prior art to adopt the inefficacy of this mode of adhesive-bonded joint and the risk that comes off.
4. in the practical application, the annular opening face of the both sides of proving ring generally by cover closure with shading wind and rain and dustproof etc., existing known technology generally is to regulate set screw usefulness, this rectangular window window cover plate for sealing at ordinary times when being provided with a rectangular window and being used to set rated load; Second kind and the 4th kind of overload protection device provided by the invention can be regulated set screw outside ring body, the user needn't open the window cover plate, can directly set needed micro-switch action load capacity outside ring body, and be very convenient.
Description of drawings
Fig. 1, Fig. 2 and Fig. 3 are the constructionals drawing of first kind of overload protection device provided by the invention, and wherein, Fig. 1 is a main structure chart, and Fig. 2 is a left view, and Fig. 3 is a cutaway view.
Fig. 4, Fig. 5 and Fig. 6 are the constructionals drawing of second kind of overload protection device provided by the invention, and wherein, Fig. 4 is a cutaway view, and Fig. 5 is a left view, and Fig. 6 is a birds-eye view.
Fig. 7 and Fig. 8 are the constructionals drawing of another embodiment of first kind of overload protection device provided by the invention, and wherein, Fig. 7 is the agent structure cutaway view, and Fig. 8 is a left view.
Fig. 9 and Figure 10 are the constructionals drawing of another embodiment of second kind of overload protection device provided by the invention, and wherein, Fig. 9 is the agent structure cutaway view, and Figure 10 is a left view.
Figure 11 and Figure 12 are the constructionals drawing of the third overload protection device provided by the invention, and wherein, Figure 11 is the agent structure cutaway view, and Figure 12 is a right elevation.
Figure 13 and Figure 14 are the constructionals drawing of the 4th kind of overload protection device provided by the invention, and wherein, Figure 13 is the agent structure cutaway view, and Figure 14 is a right elevation.
Among the figure: the little rectangle plane 12 of dynamometry ring body 1 micro-switch 2 set screw 3 rigid supports 4 screw holes 5 proving ring joints 6 near-end fixed blocks 7 long bolts 8 far-end fixed blocks 9 screw rod joints 10 short screws 11 indents
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described in further detail:
Fig. 1, Fig. 2 and Fig. 3 are the constructionals drawing of first kind of overload protection device provided by the invention, this be a kind of ear suspension type forging through modified steel proving ring structure, wherein, Fig. 1 is a main structure chart, Fig. 2 is a left view, Fig. 3 is a cutaway view.Two rigid supports 4 are arranged, be welded, be respectively applied for four micro-switchs 2 and four set screw 3 are installed by non-resilient, enough thick steel plate and non-resilient, enough thick reinforcing bar; Two rigid supports 4 in perforate on the correspondence position in case according to intert mutually shown in the accompanying drawing good after, welding is fastened on the inside of dynamometry ring body 1.Corresponding one by one after micro-switch 2 and set screw 3 install, and the contact of micro-switch 2 points to the relative same straight line that is with the ailhead of set screw 3.When dynamometry ring body 1 is subjected to tensile force f to produce deformation on direction as shown, spacing is corresponding between micro-switch 2 and the set screw 3 dwindles, when reaching the specified value of thrust that configures and be rated load, the contact travel of micro-switch 2 is conditioned the ailhead roof pressure of screw 3 just to the triggering state, reports to the police or the outage action thereby carry out.
Fig. 4, Fig. 5 and Fig. 6 are the constructionals drawing of second kind of overload protection device provided by the invention, this be a kind of external regulation type, ear suspension type forging through modified steel proving ring structure, wherein, Fig. 4 is a cutaway view, Fig. 5 is a left view, Fig. 6 is a birds-eye view.Two rigid supports 4 are arranged, be welded, be respectively applied for four micro-switchs 2 and four set screw 3 are installed by non-resilient, enough thick steel plate and non-resilient, enough thick reinforcing bar; Two rigid supports 4 in perforate on the correspondence position in case according to intert mutually shown in the accompanying drawing good after, welding is fastened on the inside of dynamometry ring body 1.Corresponding one by one after micro-switch 2 and set screw 3 install, and the contact of micro-switch 2 points to the relative same straight line that is with the ailhead of set screw 3.Dynamometry ring body 1 is processed with the screw hole 5 that runs through ring body in the position of corresponding set screw 3, make that the adjusting tail end of set screw 3 extend out to screw hole 5 outers and proving ring body wall from dynamometry ring body 1 inside beyond.When dynamometry ring body 1 is subjected to tensile force f to produce deformation on direction as shown, spacing is corresponding between micro-switch 2 and the set screw 3 dwindles, when reaching the specified value of thrust that configures and be rated load, the contact travel of micro-switch 2 is conditioned the ailhead roof pressure of screw 3 just to the triggering state, reports to the police or the outage action thereby carry out.Because the adjusting tail end of set screw 3 directly reaches outside the ring body wall, the user can directly adjust to needed load actuating quantity to set screw 3 easily outside dynamometry ring body 1.
Fig. 7 and Fig. 8 are the constructionals drawing of another embodiment of first kind of overload protection device provided by the invention, and this is a kind of non-ear suspension type, based on the proving ring structure of solid drawn pipe material, and wherein, Fig. 7 is the agent structure cutaway view, and Fig. 8 is a left view.In this embodiment, dynamometry ring body 1 is not to forge to produce, but is formed through modified and machinework manufacturing by solid drawn pipe.The ear suspension type structure is not adopted at the stressed two ends of dynamometry ring body 1, but adopts two proving ring joints 6 to be connected with a side who applies pulling force.Two rigid supports 4 are arranged, be welded, be respectively applied for four micro-switchs 2 and four set screw 3 are installed by non-resilient, enough thick steel plate and enough thick reinforcing bar; Two rigid supports 4 in fluting on the correspondence position or perforate in case according to intert mutually shown in the accompanying drawing good after, rigid support 4 welding that are used to install micro-switch 2 are fastened on inside one end of dynamometry ring body 1, and another rigid support 4 usefulness screw rods that are used to install set screw 3 are twisted to connect and are fixed on the dynamometry ring body 1 in-to-in other end.Corresponding one by one after micro-switch 2 and set screw 3 install, and the contact of micro-switch 2 points to the relative same straight line that is with the ailhead of set screw 3.When dynamometry ring body 1 is subjected to tensile force f to produce deformation on the joint direction, spacing is corresponding between micro-switch 2 and the set screw 3 dwindles, when reaching the specified value of thrust that configures and be rated load, the contact travel of micro-switch 2 is conditioned the ailhead roof pressure of screw 3 just to the triggering state, reports to the police or the outage action thereby carry out.
Fig. 9 and Figure 10 are the constructionals drawing of another embodiment of second kind of overload protection device provided by the invention, and this is a kind of external regulation type, based on the proving ring structure of solid drawn pipe material, and wherein, Fig. 9 is the agent structure cutaway view, and Figure 10 is a left view.In this embodiment, dynamometry ring body 1 is formed through modified and machinework manufacturing by solid drawn pipe.The stressed two ends of dynamometry ring body 1 are fastened with two proving ring joints 6.Two rigid supports 4 are arranged, be welded, be respectively applied for four micro-switchs 2 and four set screw 3 are installed by non-resilient, enough thick steel plate and enough thick reinforcing bar; Two rigid supports 4 in fluting on the correspondence position or perforate in case according to intert mutually shown in the accompanying drawing good after, rigid support 4 welding that are used to install micro-switch 2 are fastened on inside one end of dynamometry ring body 1, and another rigid support 4 usefulness screw rods that are used to install set screw 3 are twisted to connect and are fixed on the dynamometry ring body 1 in-to-in other end.Corresponding one by one after micro-switch 2 and set screw 3 install, and the contact of micro-switch 2 points to the relative same straight line that is with the ailhead of set screw 3.Dynamometry ring body 1 is processed with the screw hole 5 that runs through ring body in the position of corresponding set screw 3, make that the adjusting tail end of set screw 3 extend out to screw hole 5 outers and proving ring body wall from dynamometry ring body 1 inside beyond.When dynamometry ring body 1 is subjected to pulling force to produce deformation on the joint direction, spacing is corresponding between micro-switch 2 and the set screw 3 dwindles, when reaching the specified value of thrust that configures and be rated load, the contact travel of micro-switch 2 is conditioned the ailhead roof pressure of screw 3 just to the triggering state, reports to the police or the outage action thereby carry out.Because the adjusting tail end of set screw 3 directly reaches outside the ring body wall, the user can directly adjust to needed load actuating quantity to set screw 3 easily outside dynamometry ring body 1.
Figure 11 and Figure 12 are the constructionals drawing of the third overload protection device provided by the invention; this is a kind of proving ring structure based on the solid drawn pipe material, is mainly used in the moment restriction and the protection of tower crane, wherein; Figure 11 is the agent structure cutaway view, and Figure 12 is a right elevation.In this embodiment, dynamometry ring body 1 is formed through modified and machinework manufacturing by solid drawn pipe.Two rigid supports 4 are arranged, be welded, be respectively applied for four micro-switchs 2 and four set screw 3 are installed by non-resilient, enough thick steel plate and enough thick reinforcing bar; Two rigid supports 4 in fluting on the correspondence position or perforate in case according to intert mutually shown in the accompanying drawing good after, rigid support 4 welding that are used to install micro-switch 2 are fastened on inside one end of dynamometry ring body 1, and another rigid support 4 usefulness screw rods that are used to install set screw 3 are twisted to connect and are fixed on the dynamometry ring body 1 in-to-in other end.Corresponding one by one after micro-switch 2 and set screw 3 install, and the contact of micro-switch 2 points to the relative same straight line that is with the ailhead of set screw 3.The stressed two ends of dynamometry ring body 1 respectively are fastened with 6, one proving ring joints of proving ring joint 6 and are connected with near-end fixed block 7 by short screw 11, and another proving ring joint 6 is connected with far-end fixed block 9 by long bolt 8; Long bolt 8 is actually and is assembled by screw rod joint 10 by two short screw rods.Proving ring joint 6, long bolt 8 and screw rod joint 10 all are milled with the little rectangle plane 12 of several indents by diagram, during for on-site installation, the installer is with the spanner power taking, conveniently tighten assembling.This overload protection device is welded on its near-end fixed block 7 and far-end fixed block 9 on the tower cap post main chord bar of tower crane, is used for moment monitoring and overload protection to the tower machine; The arm of tower machine is when lifting stands moment loading; the corresponding generation tensile deformation of tower cap post main chord bar meeting; because fixed block 7 and 9 all is weldingly fixed on the main chord; make overload protection device of the present invention be stretched equally; spacing is corresponding between micro-switch 2 and the set screw 3 dwindles; when reaching the specified value of thrust that configures and be rated moment load, the contact travel of micro-switch 2 is conditioned the ailhead roof pressure of screw 3 just to the triggering state, reports to the police or the outage action thereby carry out.
Figure 13 and Figure 14 are the constructionals drawing of the 4th kind of overload protection device provided by the invention; this is a kind of external regulation type, based on the proving ring structure of solid drawn pipe material, be mainly used in the moment restriction and the protection of tower crane, wherein; Figure 13 is the agent structure cutaway view, and Figure 14 is a right elevation.In this embodiment, dynamometry ring body 1 is formed through modified and machinework manufacturing by solid drawn pipe.Two rigid supports 4 are arranged, be welded, be respectively applied for four micro-switchs 2 and four set screw 3 are installed by non-resilient, enough thick steel plate and enough thick reinforcing bar; Two rigid supports 4 in fluting on the correspondence position or perforate in case according to intert mutually shown in the accompanying drawing good after, rigid support 4 welding that are used to install micro-switch 2 are fastened on inside one end of dynamometry ring body 1, and another rigid support 4 usefulness screw rods that are used to install set screw 3 are twisted to connect and are fixed on the dynamometry ring body 1 in-to-in other end.Corresponding one by one after micro-switch 2 and set screw 3 install, and the contact of micro-switch 2 points to the relative same straight line that is with the ailhead of set screw 3.Dynamometry ring body 1 is processed with the screw hole 5 that runs through ring body in the position of corresponding set screw 3, beyond making that the adjusting tail end of set screw extend out to screw hole 5 outers and proving ring body wall from dynamometry ring body inside, the user can directly adjust to needed load actuating quantity to set screw 3 easily outside dynamometry ring body 1.The stressed two ends of dynamometry ring body 1 respectively are fastened with 6, one proving ring joints of proving ring joint 6 and are connected with near-end fixed block 7 by short screw 11, and another proving ring joint 6 is connected with far-end fixed block 9 by long bolt 8; Long bolt 8 is actually and is assembled by screw rod joint 10 by two short screw rods.Proving ring joint 6, long bolt 8 and screw rod joint 10 all are milled with the little rectangle plane 12 of several indents by diagram, during for on-site installation, the installer is with the spanner power taking, conveniently tighten assembling.This overload protection device is welded on its near-end fixed block 7 and far-end fixed block 9 on the tower cap post main chord bar of tower crane, is used for moment monitoring and overload protection to the tower machine; The arm of tower machine is when lifting stands moment loading; the corresponding generation tensile deformation of tower cap post main chord bar meeting; because fixed block 7 and 9 all is weldingly fixed on the main chord; make this overload protection device be stretched equally; spacing is corresponding between micro-switch 2 and the set screw 3 dwindles; when reaching the specified value of thrust that configures and be rated moment load, the contact travel of micro-switch 2 is conditioned the ailhead roof pressure of screw 3 just to the triggering state, reports to the police or the outage action thereby carry out.
Claims (10)
1. overload protection devices of hoisting device; comprise dynamometry ring body (1), micro-switch (2) and set screw (3); it is characterized in that: micro-switch (2) and set screw (3) are separately fixed at the two ends of proving ring (1) by rigid support (4); the contact of micro-switch (2) is relative with the ailhead direction of set screw (3) and corresponding one by one; on the pointing direction of the ailhead of the contact of micro-switch (2) and set screw (3) at the proving ring two ends to dynamometry ring body (1) when imposing pulling force, the pitch smaller of micro-switch (2) and set screw (3).
2. overload protection devices of hoisting device; it is characterized in that: have the described whole features of claim 1; and on the cooresponding dynamometry ring body of the adjusting tail end of set screw (3) (1); be processed with the screw hole (5) that runs through ring body, make the adjusting tail end of set screw (3) can stretch out the outer of proving ring body (1) outward to screw hole (5).
3. overload protection devices of hoisting device; it is characterized in that: have the described whole features of claim 1; and following in working order two ends of bearing pulling force of proving ring (1) all are equipped with proving ring joint (6); the proving ring joint (6) of one end connects near-end fixed block (7) by short screw (11), and the proving ring joint (6) of the other end connects far-end fixed block (9) by long bolt (8).
4. overload protection devices of hoisting device; it is characterized in that: have the described whole features of claim 2; and following in working order two ends of bearing pulling force of proving ring (1) all are connected with proving ring joint (6); the proving ring joint (6) of one end connects near-end fixed block (7) by short screw (11); the proving ring joint (6) of the other end connects far-end fixed block (9) by long bolt (8).
5. according to claim 1 or 2 or 3 or 4 described overload protection devices of hoisting device, it is characterized in that described rigid support (4) elastically-deformable rigid material can not take place makes under this overload protection device normal operation.
6. according to claim 1 or 2 or 3 or 4 described overload protection devices of hoisting device, it is characterized in that described rigid support (4) is captiveed joint with dynamometry ring body (1), is to adopt welding manner or the fastening mode of screw.
7. according to claim 1 or 2 or 3 or 4 described overload protection devices of hoisting device, it is characterized in that the quantity of described micro-switch (2) is 4.
8. according to claim 2 or 4 described overload protection devices of hoisting device, it is characterized in that the described screw hole (5) that runs through ring body can also be a through hole.
9. according to claim 3 or 4 described overload protection devices of hoisting device, it is characterized in that described long bolt (8) is to be formed by connecting by screw rod joint (10) by two sections screw rods.
10. according to claim 3 or 4 described overload protection devices of hoisting device, it is characterized in that described proving ring joint (6), long bolt (8) and screw rod joint (10) all are processed with the little rectangle plane (12) of indent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810041574A CN101648677A (en) | 2008-08-11 | 2008-08-11 | Overload protection devices of hoisting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810041574A CN101648677A (en) | 2008-08-11 | 2008-08-11 | Overload protection devices of hoisting device |
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| CN101648677A true CN101648677A (en) | 2010-02-17 |
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| CN200810041574A Pending CN101648677A (en) | 2008-08-11 | 2008-08-11 | Overload protection devices of hoisting device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060878A (en) * | 2014-07-09 | 2014-09-24 | 周刚 | Overhead stay wire hanging protector |
| CN104291212A (en) * | 2014-10-31 | 2015-01-21 | 安徽江淮汽车股份有限公司 | Overload alarming device for lifting appliance |
| CN105776028A (en) * | 2016-03-24 | 2016-07-20 | 中国十七冶集团有限公司 | Overload warning control device of mechanical lifting equipment |
| CN107473108A (en) * | 2017-06-30 | 2017-12-15 | 上海建工集团股份有限公司 | A kind of tower crane tower body vertically connects safety monitoring assembly and its use and method for early warning |
-
2008
- 2008-08-11 CN CN200810041574A patent/CN101648677A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060878A (en) * | 2014-07-09 | 2014-09-24 | 周刚 | Overhead stay wire hanging protector |
| CN104291212A (en) * | 2014-10-31 | 2015-01-21 | 安徽江淮汽车股份有限公司 | Overload alarming device for lifting appliance |
| CN105776028A (en) * | 2016-03-24 | 2016-07-20 | 中国十七冶集团有限公司 | Overload warning control device of mechanical lifting equipment |
| CN107473108A (en) * | 2017-06-30 | 2017-12-15 | 上海建工集团股份有限公司 | A kind of tower crane tower body vertically connects safety monitoring assembly and its use and method for early warning |
| CN107473108B (en) * | 2017-06-30 | 2019-05-17 | 上海建工集团股份有限公司 | A kind of tower crane tower body vertically connects safety monitoring assembly and its use and method for early warning |
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Open date: 20100217 |