What is the Design Procedure for an Eccentric Lobe and Crankshaft?

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Discussion Overview

The discussion revolves around the design procedure for an eccentric lobe and crankshaft system, specifically addressing the mechanical aspects and terminology involved in the design process. Participants are exploring the relationship between the crankshaft, connecting rod, and eccentric lobe under periodic loading conditions.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant inquires about the design procedure for an eccentric lobe and crankshaft, noting a maximum load of 350 kg and a rotation of the eccentric for about 50 degrees.
  • Another participant questions the nature of the eccentric part, asking if it is solid and requesting clarification on the terminology used regarding the shaft and eccentric runner.
  • A participant describes the eccentric as a moving part relative to the crankshaft and mentions they are in the process of modeling the assembly.
  • Concerns are raised about potential terminology confusion, with one participant suggesting that the terms "shaft" and "crank" may have been used incorrectly.
  • One participant expresses a need for an analytical design procedure for the connecting rod and eccentric lobe, as well as dimensions for the shaft.
  • Another participant seeks clarification on the role of the eccentric lobe in the system and whether the crankshaft rotates continuously or only reciprocates as needed.
  • A participant explains that the panel experiences a periodic load that causes movement, which drives the eccentric lobe and results in the rotation of the shaft.

Areas of Agreement / Disagreement

Participants have not reached a consensus on the terminology used, and there are multiple competing views regarding the design procedure and the mechanics of the system. The discussion remains unresolved with respect to the specifics of the design process.

Contextual Notes

There are limitations in the discussion regarding the clarity of the terminology used, the need for diagrams for better understanding, and the specifics of the analytical design procedure, which have not been fully addressed.

monster_head
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Guys does anyone know the design procedure for an eccentric lobe and a crankshaft. Crank is subjected to maximum load 350 kg periodically. As load is applied the crank rotates the eccentric for about 50 degrees and runs the shaft connected to the eccentric runner. Its urgent. Can anyone help out.
 
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Is the eccentric a solid part of the crankshaft?
What do you mean by “and runs the shaft connected to the eccentric runner”.
Can you provide a diagram?
 
it is a moving part with respect to the crankshaft.. I'm yet to model the whole assembly. but i did draw you the particular part. hope you can make out something out of it
 

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It seems to me from your diagram that your “shaft” is a crank, and your “Crank” is a connecting rod. This may be a problem of terminology.
 
Oh yeah.. Sorry for the error in the terminology.. I need to run the crankshaft.. And i need to design the connecting rod and eccentric lobe and get the dimension of the shaft. Is there a analytical design procedure that you could help me out with.
 
Where is the "eccentric lobe" in the system ?
Does the crankshaft rotate continuously or does it reciprocate through part of a turn only when needed ?
 
The panel gets a periodic load which tends to move it up & down and hence the connecting rod drives the eccentric lobe. Which in result rotation of the shaft. That's all..
 

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