Elimination OF Abrupt Mechanical Shock Loading

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SUMMARY

The discussion centers on mitigating abrupt mechanical shock loading from an 850 kg runaway machine descending a 20-degree ramp. The machine is tethered to a van's tow hitch, and the user seeks to size an appropriate in-line spring to absorb shock. Suggestions include using block-and-tackles for safer descent, but the forum emphasizes the risks involved and the limitations of providing precise spring calculations without comprehensive circumstances. Ultimately, the thread concludes with a warning against discussing potentially dangerous topics.

PREREQUISITES
  • Understanding of mechanical shock loading principles
  • Knowledge of spring dynamics and calculations
  • Familiarity with block-and-tackle systems
  • Basic engineering safety protocols
NEXT STEPS
  • Research spring sizing calculations for shock absorption
  • Explore block-and-tackle systems for load management
  • Study mechanical safety standards in engineering
  • Investigate alternative shock absorption methods for heavy machinery
USEFUL FOR

Engineers, safety professionals, and anyone involved in the design and operation of heavy machinery, particularly those focused on shock load mitigation and safety protocols.

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It's a problem of reducing an abrupt shock load as an 850 kg runaway machine trundles down ramps, and comes to an abrupt halt at the end of its tether fixed to a van's tow hitch. Ramps fixed to the van's rear door sill incline at 20 degrees to ground level and their length is 2.5 metres. I need to pass on figures to size a suitable in-line spring.
 
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Why not use block-and-tackles to lower it gently? That sound much safer.

If we give you a spring calculation, it might be wrong because we can't know all the circumstances no matter how much you describe it.

We don't allow discussion of dangerous topics here on PF.
 
anorlunda said:
Why not use block-and-tackles to lower it gently? That sound much safer.

If we give you a spring calculation, it might be wrong because we can't know all the circumstances no matter how much you describe it.

We don't allow discussion of dangerous topics here on PF.

This is not an existing current risk which has been resolved with a valid working tether used as a backup to a self propelled machine that is successfully being driven down ramps under its own power. I am trying to improve the tether---should on the unlikely off chance it be needed--- by reducing its shock load with a suitable spring. There are no further circumstances to describe? It is a straight forward 850kg mass down a 20 degree incline requiring buffering on a tether. (KISS)
 
Sorry, it involves the safety of people and equipment, so we can't really offer you advice on your project. Thread is closed.
 

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