Compound Lever: Difference between revisions
From DT Online
m (Added category links) |
mNo edit summary |
||
| (7 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
[[File:BenchShearCompoundLever.jpg| | [[File:BenchShearCompoundLever.jpg|400px|right]] | ||
__TOC__ | |||
Common examples of '''Compound Lever''' applications include: bolt cutters, [[Bench Shears and Guillotines|bench shears]], 'aviation' type [[tinsnips]], bass drum pedal and mechanical typewriter mechanisms. | =====Description===== | ||
Levers of any of the 3 Classes may be combined such that the load of one lever is the effort applied to another. | |||
This can be done to increase '''[[Mechanical Advantage]]''' ''(especially where operating space is restricted)'' or to increase movement as with a piano key mechanism for example. | |||
=====Features and Uses===== | |||
[[File:Fingernail Clippers.jpg|250px|left]] | |||
Common examples of '''Compound Lever''' applications include: nail clippers, bolt cutters, [[Bench Shears and Guillotines|bench shears]], 'aviation' type [[tinsnips]], bass drum pedal and mechanical typewriter mechanisms. | |||
<div style="clear: both;"></div> | |||
=====Animations===== | |||
* Examples from '''[[2100 Animated Mechanical Mechanisms|Nguyen Duc Thang's]]''' YouTube Channel '''[[2100 Animated Mechanical Mechanisms]]''' | |||
{| | |||
|- | |||
| [https://youtu.be/zLLgQCJ4vSQ '''Bench Shears'''] - a '''[[Four Bar Chain|4-Bar Linkage]]''' is used. Hand force is applied to one crank. The upper tool blade is fixed to the other crank. | |||
| {{#ev:youtube|zLLgQCJ4vSQ|200x200|right||frame|loop=1&autoplay=0&playlist=zLLgQCJ4vSQ}} | |||
| [https://youtu.be/pyGNgP6ZNvA '''Foot Operated Shearing Machine'''] - the blue slider carrying the red upper cutter is driven by a 6-bar mechanism. The sheet is clamped before sheared by a slider crank mechanism of brown eccentric shaft. The runway of the green slider is on the blue slider. The orange lower cutter is fixed to the machine base. The red upper cutter has an inclined cutting edge to cut with reduced force using a skewed slicing action. | |||
| {{#ev:youtube|pyGNgP6ZNvA|200x200|right||frame|loop=1&autoplay=0&playlist=pyGNgP6ZNvA}} | |||
|} | |||
{{Construction Kits Buyers Guide}} | |||
[[Category:Primary]] | [[Category:Primary]] | ||
[[Category:Secondary]] | [[Category:Secondary]] | ||
[[Category:Levers]] | [[Category:Levers]] | ||
Latest revision as of 13:53, 28 August 2016
Description
Levers of any of the 3 Classes may be combined such that the load of one lever is the effort applied to another.
This can be done to increase Mechanical Advantage (especially where operating space is restricted) or to increase movement as with a piano key mechanism for example.
Features and Uses
Common examples of Compound Lever applications include: nail clippers, bolt cutters, bench shears, 'aviation' type tinsnips, bass drum pedal and mechanical typewriter mechanisms.
Animations
- Examples from Nguyen Duc Thang's YouTube Channel 2100 Animated Mechanical Mechanisms
| Bench Shears - a 4-Bar Linkage is used. Hand force is applied to one crank. The upper tool blade is fixed to the other crank. | Foot Operated Shearing Machine - the blue slider carrying the red upper cutter is driven by a 6-bar mechanism. The sheet is clamped before sheared by a slider crank mechanism of brown eccentric shaft. The runway of the green slider is on the blue slider. The orange lower cutter is fixed to the machine base. The red upper cutter has an inclined cutting edge to cut with reduced force using a skewed slicing action. |
|
Click top left to enlarge |
