CN204342318U - Single pulley type crane arm pull bar - Google Patents
Single pulley type crane arm pull bar Download PDFInfo
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- CN204342318U CN204342318U CN201420766518.1U CN201420766518U CN204342318U CN 204342318 U CN204342318 U CN 204342318U CN 201420766518 U CN201420766518 U CN 201420766518U CN 204342318 U CN204342318 U CN 204342318U
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- bar
- pull bar
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- tower top
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Abstract
The utility model discloses a kind of single pulley type crane arm pull bar, it comprises the tower top pulley (2) be arranged on tower top (1); The upper winding hoisting steel rope (3) of shown tower fixed pulley (2), hoisting cable (3) one end connects lifting mechanism; Also comprise the single-sheaved block (8) being separately positioned on outside link (5), draw-in bar (6) top; When install outside link (5), draw-in bar (6) time, hoisting cable (3) other end walk around outside link (5), draw-in bar (6) top single-sheaved block (8) and be fixed on tower top (1), form a fixed pulley system; Hoist rope is that two multiplying powers play suspending bars, and therefore speed can reduce half, and the fine motion hoisted like this will improve greatly, the crawl stage in place can be relatively easy make pin shaft hole centering; And cost is low, design easy, economical and practical; Be specially adapted to middle-size and small-size tower machine.
Description
Technical field
The utility model relates to a kind of crane arm pull bar, and specifically a kind of single pulley type crane arm pull bar, belongs to hoisting crane technical field.
Background technology
The crane arm pull bar of tower top formula tower machine is generally divided into outside link and draw-in bar, and outer tie rod is all connected with tower top by bearing pin, and normally outside link lifts together with draw-in bar when mounted, also has gradation to install one by one.Because pull bar also has certain weight, can because of gravity sag in the middle part of pull bar during lifting.Then must have been assisted by pull bar device as once completed lifting, having had the auxiliary meeting of pull bar device to make the installation of pull bar very easy, but the design comparison of pull bar device is complicated, makes also cumbersome simultaneously.
Directly successively lifting as shown in Figure 1, first hoist rope 3 is walked around tower top pulley 2 to be connected with the pull bar hanger 4 on outside link 5 top, then lifting mechanism is started, when outside link 5 reaches installation site soon, point operation control is carried out to lifting mechanism, when hole centering with tower top connecting ear plate of outside link 5, pound into bearing pin, unclamp hoist rope 3 and namely realize connecting; Same method lifts draw-in bar 6 again; This crane arm pull bar needing to lift one by one, owing to being the single multiplying power lifting of hoisting cable 3, hoisting cable 3 speed is wayward, pull bar difficulty in place can be caused like this, often need crawl repeatedly could realize centering to install, often cause the irritated of installation personnel when mounted at heart.
The auxiliary installation method of simultaneously slinging of use pull bar device as shown in Figure 2, first be that pull bar device 7 is connected with two groups of pull bars, then hoist rope 3 is walked around tower top pulley 2, walk around pull bar device pulley again, steel rope two multiplying power can be realized like this, three multiplying powers or four multiplying powers promote, after starting lifting mechanism, two groups of pull bars are promoted simultaneously, when outside link 5 is near installation site, point operation control is carried out to lifting mechanism, outside link 5 meeting first installation in position, rear hoist rope 3 in place, draw-in bar 5 can be in a position of relatively easily installing, squeeze into pin shaft joint draw-in bar 5, installation assisted by this pull bar device that needs, and can realize once lifting, but the structure of pull bar device 7 is relatively loaded down with trivial details and need design separately, for medium and small type, then can obviously occupy certain cost, practical but uneconomical.
Summary of the invention
For above-mentioned prior art Problems existing, the utility model provides a kind of single pulley type crane arm pull bar, convenient and swiftly laborsaving installation in place is carried out in pull bar pull-up.
To achieve these goals, the technical solution adopted in the utility model is: a kind of single pulley type crane arm pull bar, it comprises
Be arranged on the tower top pulley on tower top;
Winding hoisting steel rope on shown tower top pulley, hoisting cable one end connects lifting mechanism;
Also comprise the single-sheaved block being separately positioned on outside link, draw-in bar top;
When install outside link, draw-in bar time, the hoisting cable other end walk around outside link, draw-in bar top single-sheaved block and be fixed on tower top, form two multiplying power pulley systems; Start lifting mechanism by outside link, draw-in bar pull-up, when reaching the mode with regard to changing crawl during site into soon and adjusting arm-tie hole site until pin shaft hole centering loads bearing pin.
Described hoisting cable is the steel rope that two multiplying powers are wound around.
Described single-sheaved block quantity is 2, is installed on the top of crane arm pull bar near the pull bar of tower top junction respectively.
Hoist rope in the utility model is that two multiplying powers play suspending bars, and therefore speed can reduce half, and the fine motion hoisted like this will improve greatly, the crawl stage in place can be relatively easy make pin shaft hole centering;
Compared with pull bar device, this programme cost is low, designs easy, economical and practical; Be specially adapted to middle-size and small-size tower machine.
Accompanying drawing explanation
Fig. 1 is existing direct successively hoisting structure schematic diagram;
Fig. 2 uses the auxiliary installation method structural representation of simultaneously slinging of pull bar device;
Fig. 3 is the utility model structural representation.
In figure: 1, tower top, 2, tower top pulley, 3, hoisting cable, 4, pull bar hanger, 5, outside link, 6, draw-in bar, 7, pull bar device, 8, single-sheaved block.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 3, a kind of single pulley type crane arm pull bar, it comprises
Be arranged on the tower top pulley 2 on tower top 1;
Winding hoisting steel rope 3 on shown tower top pulley 2, hoisting cable 3 one end connects lifting mechanism;
Also comprise the single-sheaved block 8 being separately positioned on outside link 5, draw-in bar 6 top, wherein said single-sheaved block 8 quantity is 2, is installed on the top of crane arm pull bar near the pull bar of tower top 1 junction respectively.
When install outside link 5, draw-in bar 6 time, hoisting cable 3 other end walk around outside link 5, draw-in bar 6 top single-sheaved block 8 and be fixed on tower top 1, form two multiplying power pulley systems; Start lifting mechanism by outside link 5, draw-in bar 6 pull-up, when reaching the mode with regard to changing crawl during site into soon and adjusting arm-tie hole site until pin shaft hole centering loads bearing pin.
Described hoisting cable 3 is the steel rope that two multiplying powers are wound around, therefore rising or falling speed can reduce half, the fine motion hoisted like this will improve greatly, the crawl stage in place can be relatively easy make pin shaft hole centering, and the utility model cost is low, design easy, economical and practical, be particularly suitable for middle-size and small-size tower machine.
Claims (3)
1. a single pulley type crane arm pull bar, it comprises
Be arranged on the tower top pulley (2) on tower top (1);
The upper winding hoisting steel rope (3) of shown tower top pulley (2), hoisting cable (3) one end connects lifting mechanism;
It is characterized in that, also comprise the single-sheaved block (8) being separately positioned on outside link (5), draw-in bar (6) top;
When install outside link (5), draw-in bar (6) time, hoisting cable (3) other end walk around outside link (5), draw-in bar (6) top single-sheaved block (8) and be fixed on tower top (1), form two multiplying power pulley systems; Start lifting mechanism by outside link (5), draw-in bar (6) pull-up, when reaching the mode with regard to changing crawl during site into soon and adjusting arm-tie hole site until pin shaft hole centering loads bearing pin.
2. a kind of single pulley type crane arm pull bar according to claim 1, is characterized in that, described hoisting cable (3) is the steel rope that two multiplying powers are wound around.
3. a kind of single pulley type crane arm pull bar according to claim 1, is characterized in that, described single-sheaved block (8) quantity is 2, is installed on the top of crane arm pull bar near the pull bar of tower top (1) junction respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420766518.1U CN204342318U (en) | 2014-12-09 | 2014-12-09 | Single pulley type crane arm pull bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420766518.1U CN204342318U (en) | 2014-12-09 | 2014-12-09 | Single pulley type crane arm pull bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204342318U true CN204342318U (en) | 2015-05-20 |
Family
ID=53225604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420766518.1U Active CN204342318U (en) | 2014-12-09 | 2014-12-09 | Single pulley type crane arm pull bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204342318U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365050A (en) * | 2016-11-10 | 2017-02-01 | 徐州建机工程机械有限公司 | Novel pull rod fast installation structure |
| CN106904543A (en) * | 2017-03-02 | 2017-06-30 | 哈尔滨理工大学 | A kind of new derrick runway girder pull bar installation plate pulling device |
-
2014
- 2014-12-09 CN CN201420766518.1U patent/CN204342318U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365050A (en) * | 2016-11-10 | 2017-02-01 | 徐州建机工程机械有限公司 | Novel pull rod fast installation structure |
| CN106904543A (en) * | 2017-03-02 | 2017-06-30 | 哈尔滨理工大学 | A kind of new derrick runway girder pull bar installation plate pulling device |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |