CN101648678A - Overload protection devices of hoisting device - Google Patents
Overload protection devices of hoisting device Download PDFInfo
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- CN101648678A CN101648678A CN200810041575A CN200810041575A CN101648678A CN 101648678 A CN101648678 A CN 101648678A CN 200810041575 A CN200810041575 A CN 200810041575A CN 200810041575 A CN200810041575 A CN 200810041575A CN 101648678 A CN101648678 A CN 101648678A
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- overload protection
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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 more reliability and stability. 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 ring through 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 two ends of the proving ring in the vertical direction pointed by the contact terminal, the distance between the micro switch and the adjusting screw is reduced. On the basis of the basic structure, a screw 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 joints, screw rods and fixed blocks at the two ends of the proving ring based on the twokinds 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.
The bow-shaped shrapnel that the prior art scheme adopts, it is consistent relative with direction of action in line with the set screw aligning that its crooked fit cannot say for sure to demonstrate,prove the micro-switch contact, influence sensitivity and precision, 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 stability of prior art and reliability are not satisfactory.
Summary of the invention
The objective of the invention is to overcome known technology and deficiency of the prior art; the overload protection devices of hoisting device of another kind of structure is provided; it is easy to accurately assemble micro-switch and set screw, be subjected to variation of ambient temperature to influence less, stability and reliability 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 the proving ring two ends on the vertical direction of the sensing of the ailhead of the contact of micro-switch and set screw impose pulling force to the dynamometry ring body; 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 vertical direction of the sensing 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, for example 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: when at the proving ring two ends proving ring being pressed on the pointing direction of the ailhead of the contact of micro-switch and set screw, 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.
Second kind and the 4th kind of overload protection device provided by the invention for the purpose of protective effect, in the set screw hole of dynamometry ring body or the outside of through hole, can also have removable cover, and removable cover can adopt hinge as flexible connection.
Compared with the prior art, advantage of the present invention is:
1. compared to the bow-shaped shrapnel formula structure of prior art, the rigid support that the present invention adopts, the more difficult temperature difference influence that expands with heat and contract with cold in the external world, stability and the better reliability of being subjected to.
2. compared to the crooked fit of bow-shaped shrapnel, technology of the present invention makes that the Installation and Debugging of micro-switch and set screw are more easy, and the easier correspondence one by one of micro-switch and set screw can improve precision and sensitivity also in a straight line.
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 and Fig. 2 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.
Fig. 3 and Fig. 4 are the constructionals drawing of second kind of overload protection device provided by the invention, and wherein, Fig. 3 is a right elevation, and Fig. 4 is the A-A cutaway view.
Fig. 5 and Fig. 6 are the constructionals drawing of another embodiment of first kind of overload protection device provided by the invention, and wherein, Fig. 5 is the agent structure cutaway view, and Fig. 6 is a right elevation.
Fig. 7 and Fig. 8 are the constructionals drawing of another embodiment of second kind of overload protection device provided by the invention, and wherein, Fig. 7 is the agent structure cutaway view, and Fig. 8 is a right elevation.
Fig. 9 and Figure 10 are the constructionals drawing of the third overload protection device provided by the invention, and wherein, Fig. 9 is a right elevation, and Figure 12 is the agent structure cutaway view.
Figure 11 and Figure 12 are the constructionals drawing of the 4th kind of overload protection device provided by the invention, and wherein, Figure 11 is a right elevation, and Figure 12 is the agent structure cutaway view.
Among the figure: little rectangle plane 12 removable covers 13 hinges 14 fix screws 15 moving screws 16 holding screws 17 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 and Fig. 2 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.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; Two rigid supports 4 all weld the in-to-in two ends that are fastened on 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. 3 and Fig. 4 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. 3 is a right elevation, Fig. 4 is the A-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; Two rigid supports 4 all weld the inside that is fastened on 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 that the contact of micro-switch 2 points to and the ailhead of set screw 3 points to when being subjected to pulling force generation deformation on the perpendicular direction at the hangers two ends, 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.The adjusting tail end of the set screw that exposes for protection; ad hoc have a removable cover 13; one end of removable cover 13 is a hinge 14, is fastened on the ring body outer wall with fix screw 15, and the other end of removable cover 13 is fixed on the ring body outer wall with moving screw 16 that can formula for convenience detach.Moving screw 16 can be the such form of socket head cap screw.
Fig. 5 and Fig. 6 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. 5 is the agent structure cutaway view, and Fig. 6 is a right elevation.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.There are two rigid supports 4 to be respectively applied for four micro-switchs 2 and four set screw 3 are installed; Two rigid supports 4 are weldingly fixed on dynamometry ring body 1 in-to-in two ends respectively as shown.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. 7 and Fig. 8 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. 7 is the agent structure cutaway view, and Fig. 8 is a right elevation.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 not used to install four micro-switchs 2 and four set screw 3; Two rigid supports 4 are weldingly fixed on dynamometry ring body 1 in-to-in two ends as shown.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.The adjusting tail end of the set screw that exposes for protection; ad hoc have a removable cover 13; one end of removable cover 13 is a hinge 14, is fastened on the ring body outer wall with fix screw 15, and the other end of removable cover 13 is fixed on the ring body outer wall with moving screw 16 that can formula for convenience detach.Moving screw 16 can be the such form of socket head cap screw.
Fig. 9 and Figure 10 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; Fig. 9 is a right elevation, and Figure 10 is the agent structure cutaway view.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 respectively applied for four micro-switchs 2 and four set screw 3 are installed; Two rigid supports 4 are fixed on dynamometry ring body 1 in-to-in two ends with welding manner.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.Dynamometer link joint 6 and screw rod joint 10 all have holding screw 17 nails to bite the screw rod of the inside, prevent the screw rod unintentional rotation.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 11 and Figure 12 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 11 is a right elevation, and Figure 12 is the agent structure cutaway view.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 respectively applied for four micro-switchs 2 and four set screw 3 are installed; Two rigid supports 4 are fixed on dynamometry ring body 1 in-to-in two ends in the mode of welding.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 adjusting tail end of the set screw that exposes for protection; ad hoc have a removable cover 13; one end of removable cover 13 is a hinge 14, is fastened on the ring body outer wall with fix screw 15, and the other end of removable cover 13 is fixed on the ring body outer wall with moving screw 16 that can formula for convenience detach.Moving screw 16 can be the such form of socket head cap screw.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.Dynamometer link joint 6 and screw rod joint 10 all have holding screw 17 nails to bite the screw rod of the inside, prevent the screw rod unintentional rotation.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; proving ring two ends on the vertical direction of the sensing of the ailhead of the contact of micro-switch (2) and set screw (3) are 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 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.
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 2 or 4 described overload protection devices of hoisting device, it is characterized in that, also have removable cover (13).
10. overload protection devices of hoisting device according to claim 1 and 2; it is characterized in that; pressure is applied to proving ring two ends on the pointing direction of the ailhead of the contact of micro-switch (2) and set screw (3); promptly can carry out dynamometry to pressure, described overload protection devices of hoisting device then can be as the overload protection device of pressure dynamometry class.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810041575A CN101648678A (en) | 2008-08-11 | 2008-08-11 | Overload protection devices of hoisting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810041575A CN101648678A (en) | 2008-08-11 | 2008-08-11 | Overload protection devices of hoisting device |
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| CN101648678A true CN101648678A (en) | 2010-02-17 |
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| CN200810041575A Pending CN101648678A (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 |
|---|---|---|---|---|
| CN102583180A (en) * | 2012-02-29 | 2012-07-18 | 王基业 | Overload protecting device for tower crane |
| CN106744326A (en) * | 2017-03-31 | 2017-05-31 | 太原科技大学 | A kind of raising lift heavy is weighed and control device |
| CN114394499A (en) * | 2021-12-30 | 2022-04-26 | 国网江苏省电力有限公司建设分公司 | Safety monitoring system and monitoring method for angle-adjustable suspension cage |
| CN114394499B (en) * | 2021-12-30 | 2024-05-17 | 国网江苏省电力有限公司建设分公司 | Safety monitoring system and monitoring method for angle-adjustable suspension cage |
-
2008
- 2008-08-11 CN CN200810041575A patent/CN101648678A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583180A (en) * | 2012-02-29 | 2012-07-18 | 王基业 | Overload protecting device for tower crane |
| CN106744326A (en) * | 2017-03-31 | 2017-05-31 | 太原科技大学 | A kind of raising lift heavy is weighed and control device |
| CN106744326B (en) * | 2017-03-31 | 2018-02-13 | 太原科技大学 | A kind of raising lift heavy weighs and control device |
| CN114394499A (en) * | 2021-12-30 | 2022-04-26 | 国网江苏省电力有限公司建设分公司 | Safety monitoring system and monitoring method for angle-adjustable suspension cage |
| CN114394499B (en) * | 2021-12-30 | 2024-05-17 | 国网江苏省电力有限公司建设分公司 | Safety monitoring system and monitoring method for angle-adjustable suspension cage |
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Open date: 20100217 |