CN2442980Y - Balanced pulley eccentric spring force moment limiter - Google Patents
Balanced pulley eccentric spring force moment limiter Download PDFInfo
- Publication number
- CN2442980Y CN2442980Y CN 00248813 CN00248813U CN2442980Y CN 2442980 Y CN2442980 Y CN 2442980Y CN 00248813 CN00248813 CN 00248813 CN 00248813 U CN00248813 U CN 00248813U CN 2442980 Y CN2442980 Y CN 2442980Y
- Authority
- CN
- China
- Prior art keywords
- tower crane
- balanced
- bearing pin
- line
- eccentric shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a balanced pulley eccentric spring force moment limiter, which is a lifting force moment limiter for a tower crane, and an eccentric shaft is connected with the top of the tower crane. The utility model is characterized in that an eccentric part arranged in the middle part of the eccentric shaft is provided with the balanced pulley on which a balanced guy cable is wound, both ends of the balanced guy cable are respectively connected with a draw plate by pin shafts, and the lower end of the draw plate is connected with a draw rod of the tower crane with the pin shafts. The end part of the eccentric shaft is fixed with a transmission lever, wherein, the end part of which is connected with a similar spring type lifting power limiter member through the pin shafts. The utility model has the advantages of simple structure, reasonable structure, high safety, easy debugging and low cost.
Description
The utility model relates to a kind of load moment limiter of tower crane, belongs to tower crane
Technical field.
Because being the variationization with work range, the rated load weight of tower crane changes.Behind the tower crane hoisting heavy, with the also corresponding increase of its hoisting moment of increase of weight mobile range.If hoisting moment is excessive, major accident such as can cause that the tumbling of tower crane, folding arm, body of the tower folding fall.For fear of the generation of accident, tower crane should be adorned load moment limiter.The mechanical type load moment limiter is use always a kind of.
Existing mechanical type load moment limiter needs testing amplitude and two parameters of hoisting capacity, drive a covering device of simulation reel work by coupler by amplitude-changing drum, and realize monitoring to moment under the different amplitudes, complex structure, cost height by steel wire tow line and curve ruler.
The utility model purpose is to overcome the shortcoming in the above-mentioned technology, a kind of compensating pulley centering type spring torque killer is proposed, its eccentric shaft is installed in the tower crane top, eccentric part is equipped with compensating pulley in the middle of eccentric shaft, be wound with a balanced drag-line on the compensating pulley, the two ends of balanced drag-line are connected with arm-tie by bearing pin respectively, and the arm-tie lower end is connected with the pull bar upper end of tower crane with bearing pin.The elevator boom rack system that makes tower crane is converted into statically determimate structure by the hyperstatic structure of three fulcrums, and this moment, the pulling force of pull bar was directly proportional with hoisting moment.Drawbar Pull acts on the eccentric shaft of cat head by balanced drag-line and compensating pulley, and produce one with lifting power apart from the eccentric moment that is directly proportional, eccentric moment reaches end points by force transferring lever and produces application force to spring, the size of this power is directly proportional with the pulling force of pull bar, just is directly proportional with hoisting moment.Suitably adjust the tight power of giving of spring, and two switches be set, when hoisting moment reach rated value 95% the time, spring begins distortion, and touches the first element switch, sends alerting signal; When hoisting moment reach rated value 100% the time, touch second step switch, mechanism is quit work.
The utility model has the advantages that simple and reasonable for structure, safe and reliable, the easy cost of Installation and Debugging is low.
In conjunction with the accompanying drawings, two embodiment are described
Fig. 1 is to use the compensating pulley centering type spring torque limiter structure scheme drawing of pressure type spring.Eccentric shaft 1 is installed in the top of tower crane, compensating pulley 2 is contained in the middle eccentric part of eccentric shaft 1, and eccentric throw is e, and balanced drag-line 3 is walked around compensating pulley, its end connects arm-tie 5 by bearing pin 4 respectively, and arm-tie 5 lower ends are connected the pull bar 6 of tower crane by bearing pin.Drawbar Pull acts on the compensating pulley 2, produces eccentric moment, and eccentric moment acts on the end by force transferring lever 7, generation is to the pressure of spring 12, and the pressure size is directly proportional with hoisting moment, and 10 is adjustment nut, 11 for regulating bolt, the 13rd, spring guide, 14 is spring perch, the 15th, bearing, the 16th, trigger bolt, the 17th, jam nut, the 18, the 19th, step switch, the 24th, binding.Arrow is depicted as turning to of eccentric moment.
Fig. 2 is the compensating pulley centering type spring torque limiter structure scheme drawing of three pull bar elevator boom racks, the 12nd, and spring (pull-type), the 20th, top sheave, the 21st, connecting panel, the 22nd, lower sheave, the 23rd, following balanced drag-line.
Claims (3)
1. compensating pulley centering type spring torque killer is connected the top of tower crane by an eccentric shaft.It is characterized in that a compensating pulley being installed in eccentric shaft middle part eccentric part.Be wound with a balanced drag-line on the compensating pulley, the two ends of balanced drag-line connect the pull bar of arm-tie arm-tie lower end with bearing pin connection tower crane by bearing pin respectively, at an end of eccentric shaft, fix a force transferring lever.The force transferring lever end connects the member of a spring-like formula load lifting limiter by bearing pin.
2. according to the described compensating pulley centering type of claim 1 spring torque killer, it is characterized in that its spring can be pull-type, also can be pressure type.
3. according to the described compensating pulley formula of claim 2 spring torque killer, it is characterized in that connecting sister block, and this end is fixed on the tower crane top at an end of balanced drag-line.Sister block is made up of bearing pin and connecting panel bonded assembly top sheave and lower sheave, and lower sheave is wound with down balanced drag-line, and the other end of following balanced drag-line two ends and balanced drag-line connects arm-tie by bearing pin respectively, and the arm-tie lower end is connected with the pull bar of tower crane with bearing pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00248813 CN2442980Y (en) | 2000-10-05 | 2000-10-05 | Balanced pulley eccentric spring force moment limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00248813 CN2442980Y (en) | 2000-10-05 | 2000-10-05 | Balanced pulley eccentric spring force moment limiter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2442980Y true CN2442980Y (en) | 2001-08-15 |
Family
ID=33607379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00248813 Expired - Fee Related CN2442980Y (en) | 2000-10-05 | 2000-10-05 | Balanced pulley eccentric spring force moment limiter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2442980Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109940659A (en) * | 2019-03-28 | 2019-06-28 | 东南大学 | A kind of Wire driven robot elastic mechanism for the compensation of mechanical arm gravitational moment |
-
2000
- 2000-10-05 CN CN 00248813 patent/CN2442980Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109940659A (en) * | 2019-03-28 | 2019-06-28 | 东南大学 | A kind of Wire driven robot elastic mechanism for the compensation of mechanical arm gravitational moment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |