CN101717047A - Overload protection device for electric hoist crane - Google Patents
Overload protection device for electric hoist crane Download PDFInfo
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- CN101717047A CN101717047A CN200910228516A CN200910228516A CN101717047A CN 101717047 A CN101717047 A CN 101717047A CN 200910228516 A CN200910228516 A CN 200910228516A CN 200910228516 A CN200910228516 A CN 200910228516A CN 101717047 A CN101717047 A CN 101717047A
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- elastic element
- load lifting
- limiter
- protection device
- lifting limiter
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Abstract
The invention relates to an overload protection device for an electric hoist crane, which comprises a suspending beam, a hoist weighting limiter and a taper sleeve provided with a hoisting cable, and is characterized in that: the inside of the suspending beam is provided with the taper sleeve through a pin roll; an eccentric moment plate is arranged on the pin roll; the middle bent part of the eccentric moment plate is arranged on the suspending beam through a pin roll; a signal acquisition end of the eccentric moment plate is made into a horizontal section; the upper part of the horizontal section is provided with a horizontal bottom plate on which an elastic element is arranged; the hoist weighting limiter is arranged over the elastic element, and is a pressure type hoist weighting limiter; a gap is reserved between the bottom surface of the hoist weighting limiter and the elastic element; and the suspending beam on the outer side of the elastic element is provided with a sensor for measuring displacement and deformation of the elastic element in the horizontal direction. The overload protection device has the advantages of compact structure, small volume, high sensitivity and high safety performance.
Description
Technical field
The invention belongs to hoisting crane manufacturing technology field, particularly relate to a kind of overload protection device for electric hoist crane.
Background technology
At present, hoisting crane is widely used in fields such as Aeronautics and Astronautics, nuclear power, and electric block is a component part important in the hoisting crane, has a wide range of applications in a lot of fields.Since the particularity of many working spaces, for the purpose of safety guard-safeguard, Don't Exceed Weight Limit lotus hoisting heavy.State Administration for Quality Supervision and Inspection and Quarantine was in issue on 02 21st, 2008; on 08 01st, 2008 formal " the elevator machinery safety and technical supervision rules-crane in bridge type " implemented; the 69 regulation wherein; hoisting crane all must be provided with load lifting limiter, and as seen the importance of safety guard is installed.See also Fig. 4, existing mainly tension board of installation on the suspension crossbeam is installed a load lifting limiter of gathering the tension board pulling force on the tension board, cover of wedge is installed in the lower end of tension board, it is big that this kind structure has a volume, and the rise height of cost height and suspension hook is subjected to certain restriction; Because tension board is in a strained condition for a long time, and the tensile deformation amount of tension board will change in the course of time, thereby causes the inaccurate of Information Monitoring, therefore long-time use makes and has certain potential safety hazard in addition.
Summary of the invention
The present invention provides a kind of compact conformation, volume little, highly sensitive for solving the technical matters that exists in the known technology, the overload protection device for electric hoist crane that safety performance is high.
The technical scheme that the present invention takes for the technical matters that exists in the solution known technology is:
A kind of overload protection device for electric hoist crane; comprise the suspension crossbeam; load lifting limiter and the cover of wedge that steel rope is installed; it is characterized in that: describedly by bearing pin cover of wedge is installed hanging crossbeam inside; the eccentric moment plate also is installed on the bearing pin; the middle bending part of eccentric moment plate is installed in by bearing pin and hangs on the crossbeam; the acquisition of signal end of eccentric moment plate is made horizontal segment; top at horizontal segment is equipped with horizonal base plate; elastic element is installed on horizonal base plate; load lifting limiter is installed on top over against elastic element; this load lifting limiter adopts the pressure type load lifting limiter; be provided with the gap between load lifting limiter bottom surface and the elastic element, the sensor of measuring elastic element horizontal direction displacement deformation is installed on the side mounting crossbeam outside elastic element.
The present invention can also adopt following technical measures:
Described elastic element adopts belleville spring.
Described horizonal base plate is provided with guidepost, is set with the belleville spring that two symmetries are placed on guidepost.
Advantage and good effect that the present invention has are: because the present invention adopts technique scheme; This apparatus structure compactness is saved the space, can install the corresponding protection measure additional.It utilizes an eccentric moment plate cleverly, changes original force way, makes original load lifting limiter that need to measure big pulling force replace to the load lifting limiter of measuring less pressure, reduces volume in the time of the precision that guaranteed to measure.On the basis of this structure, change the installation site of existing load limiter, the load lifting limiter with the alternative original measurement pulling force of new gaging pressure load lifting limiter so not only makes the precision of measurement higher.Also will dwindle the oad of load lifting limiter greatly, the rising limit when guaranteeing hoisting crane work.The present invention also has the function of duplicate protection in addition; promptly increase a sensor of measuring the deformation of elastic element horizontal direction in the elastic element side; like this when one of them sensor breaks down; another sensor still can normal operation; thereby reach the purpose of duplicate protection, for the safety in production of hoisting crane provides necessary guarantee, simultaneously when hanging the steel rope swing of carrying; disk spring can play autoregulation, make to hang the object that carries more steady.Increase single-piece stability.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 be among Fig. 1 A-A to cutaway view;
Fig. 3 is eccentric moment plate and the local enlarged diagram of elastic element connection structure among Fig. 1;
Fig. 4 is the prior art structural representation.
Among the figure: 1, hang crossbeam; 2, load lifting limiter; 3, steel rope; 4, cover of wedge; 5, bearing pin; 6, eccentric moment plate; 6-1, middle bending part; 6-2, bearing pin; 6-3, acquisition of signal end; 6-4, horizonal base plate; 6-5, guidepost; 7, elastic element; 7-1, belleville spring; 8, sensor.
The specific embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1 to Fig. 3; a kind of overload protection device for electric hoist crane; comprise the suspension crossbeam of installing on the lanyard device (being not mark among the figure) 1; load lifting limiter 2 and the cover of wedge 4 that steel rope 3 is installed; described inner by bearing pin 5 installation covers of wedge 4 at suspension crossbeam 1; eccentric moment plate 6 also is installed on the bearing pin 5; the middle bending part 6-1 of eccentric moment plate 6 is installed in by bearing pin 6-2 and hangs on the crossbeam 1; the acquisition of signal end 6-3 of eccentric moment plate 6 makes horizontal segment; on the top of horizontal segment horizonal base plate 6-4 is installed; elastic element 7 is installed on horizonal base plate 6-4; load lifting limiter 2 is installed on top over against elastic element 7; this load lifting limiter 2 adopts the pressure type load lifting limiter; under light condition; be provided with the gap between load lifting limiter 2 bottom surfaces and the elastic element 7; generally set its gap width according to the deformation of bearing pin; gap width in this enforcement is 0.5mm～1mm, and the sensor 8 of measuring elastic element 7 horizontal direction displacement deformation is installed on the side mounting crossbeam 1 outside elastic element 7.
Principle of work: when hoisting heavy; gravity is delivered on the cover of wedge 4 by steel rope 3; cover of wedge 4 links to each other with suspension crossbeam 1 by a bearing pin 5; after this bearing pin 5 is stressed; can produce a micro-deformation; producing an eccentric arm of force by eccentric moment plate 6 and this fulcrum of bearing pin 6-2 acts on the horizonal base plate 6-4; be welded in the acquisition of signal end 6-3 of eccentric moment plate 6 on the horizonal base plate 6-4; guidepost 6-5 is housed on the horizonal base plate 6-4; disk spring 7-1 can move freely by vertical direction on guidepost 6-5; deformation by these two symmetrical disk springs of installing collects information; load lifting limiter 2 is accepted this information and is converted it into and the proportional voltage signal of load; situation that so just can real time recording load; can accurately understand the situation of the load of hanging; when reaching rated load; and surpass the load of defined; load limiter can cut off electrical source of power automatically; play the function of safety guard-safeguard; meanwhile; when belleville spring generation deformation; be installed in the sensor 8 of its side; can collect the horizontal deformational displacement signal of belleville spring automatically; the deformational displacement signal collection is handled; after sensor acceptance; information is changed into corresponding electric signal, and the situation of real time recording load plays the function of safety guard-safeguard equally.Like this when one of them load lifting limiter or sensor break down, another fender guard still can normal operation, thereby reaches the purpose of duplicate protection.The guarantee of necessity is provided for the safety in production of hoisting crane.
Said structure has compact conformation in sum, volume is little, highly sensitive, the security performance advantages of higher. It utilizes an eccentric moment plate cleverly, changes original force way, makes original load lifting limiter that need to measure big pulling force replace to the load lifting limiter of the littler pressure of measurement, reduces volume in the time of the precision that guaranteed to measure. On the basis of this structure, change the installation site of existing load limiter, the load lifting limiter with the alternative original measurement pulling force of new gaging pressure load lifting limiter so not only makes the precision of measurement higher. Also will greatly dwindle the appearance and size of load lifting limiter, the rising limit when guaranteeing crane work. The present invention also has the function of duplicate protection in addition; namely increase a sensor of measuring the deformation of flexible member horizontal direction in the flexible member side; by this sensor, we just can measure and show according to the display unit of outer connection simultaneously the weight of lifting thing in real time, when weight reaches setting value; has the acousto-optic early warning; report to the police, and cut off the function of hoisting circuit power supply, thereby reach the function with dual security protection; when making crane work, more safe and reliable.
Claims (3)
1. overload protection device for electric hoist crane; comprise the suspension crossbeam; load lifting limiter and the cover of wedge that steel rope is installed; it is characterized in that: describedly by bearing pin cover of wedge is installed hanging crossbeam inside; the eccentric moment plate also is installed on the bearing pin; the middle bending part of eccentric moment plate is installed in by bearing pin and hangs on the crossbeam; the acquisition of signal end of eccentric moment plate is made horizontal segment; top at horizontal segment is equipped with horizonal base plate; elastic element is installed on horizonal base plate; load lifting limiter is installed on top over against elastic element; this load lifting limiter adopts the pressure type load lifting limiter; be provided with the gap between load lifting limiter bottom surface and the elastic element, the sensor of measuring elastic element horizontal direction displacement deformation is installed on the side mounting crossbeam outside elastic element.
2. overload protection device for electric hoist crane according to claim 1 is characterized in that: described elastic element adopts belleville spring.
3. overload protection device for electric hoist crane according to claim 1 and 2 is characterized in that: described horizonal base plate is provided with guidepost, is set with the belleville spring that two symmetries are placed on guidepost.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102285160A CN101717047B (en) | 2009-11-13 | 2009-11-13 | Overload protection device for electric hoist crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102285160A CN101717047B (en) | 2009-11-13 | 2009-11-13 | Overload protection device for electric hoist crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101717047A true CN101717047A (en) | 2010-06-02 |
| CN101717047B CN101717047B (en) | 2012-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102285160A Expired - Fee Related CN101717047B (en) | 2009-11-13 | 2009-11-13 | Overload protection device for electric hoist crane |
Country Status (1)
| Country | Link |
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| CN (1) | CN101717047B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910538A (en) * | 2012-09-20 | 2013-02-06 | 宁波凯荣船用机械有限公司 | Hoisting weight limiter |
| CN103274302A (en) * | 2013-04-27 | 2013-09-04 | 江苏工力重机有限公司 | Mounting structure of overload limiter of ship unloader |
| CN106081920A (en) * | 2016-08-10 | 2016-11-09 | 河南新科起重机股份有限公司 | A kind of modularity calabash load limiter |
| CN106716055A (en) * | 2014-04-23 | 2017-05-24 | 哈利伯顿能源服务公司 | Measuring hookload |
| CN107482562A (en) * | 2017-09-01 | 2017-12-15 | 南方电网科学研究院有限责任公司 | Power transmission tower |
| CN108285096A (en) * | 2018-03-05 | 2018-07-17 | 苏州库力铁重工有限公司 | Rope end fixing device |
| CN113148852A (en) * | 2021-04-30 | 2021-07-23 | 乐山市特种设备监督检验所 | Measuring device for load mass of hoisting machinery |
| CN114483881A (en) * | 2022-01-21 | 2022-05-13 | 湖南三一中型起重机械有限公司 | Cable joint assembly and operation machine |
-
2009
- 2009-11-13 CN CN2009102285160A patent/CN101717047B/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910538A (en) * | 2012-09-20 | 2013-02-06 | 宁波凯荣船用机械有限公司 | Hoisting weight limiter |
| CN103274302A (en) * | 2013-04-27 | 2013-09-04 | 江苏工力重机有限公司 | Mounting structure of overload limiter of ship unloader |
| CN103274302B (en) * | 2013-04-27 | 2015-04-29 | 江苏工力重机有限公司 | Mounting structure of overload limiter of ship unloader |
| CN106716055A (en) * | 2014-04-23 | 2017-05-24 | 哈利伯顿能源服务公司 | Measuring hookload |
| CN106081920A (en) * | 2016-08-10 | 2016-11-09 | 河南新科起重机股份有限公司 | A kind of modularity calabash load limiter |
| CN107482562A (en) * | 2017-09-01 | 2017-12-15 | 南方电网科学研究院有限责任公司 | Power transmission tower |
| CN107482562B (en) * | 2017-09-01 | 2023-04-18 | 南方电网科学研究院有限责任公司 | Power transmission tower |
| CN108285096A (en) * | 2018-03-05 | 2018-07-17 | 苏州库力铁重工有限公司 | Rope end fixing device |
| CN108285096B (en) * | 2018-03-05 | 2023-10-20 | 苏州库力铁重工有限公司 | rope end fixing device |
| CN113148852A (en) * | 2021-04-30 | 2021-07-23 | 乐山市特种设备监督检验所 | Measuring device for load mass of hoisting machinery |
| CN114483881A (en) * | 2022-01-21 | 2022-05-13 | 湖南三一中型起重机械有限公司 | Cable joint assembly and operation machine |
| CN114483881B (en) * | 2022-01-21 | 2023-03-24 | 湖南三一中型起重机械有限公司 | Cable joint assembly and operation machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101717047B (en) | 2012-07-18 |
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Granted publication date: 20120718 Termination date: 20121113 |