A typical wrist mechanism with three rotational joints would be indicated by

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ESE Mechanical 2021 Official Paper
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  1. TRL
  2. TRT
  3. LLL
  4. TRR

Answer (Detailed Solution Below)

Option 4 : TRR
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ST 1: UPSC ESE (IES) Civil - Building Materials
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Explanation:

Rotational joints:

A rotational joint allows two 3-dimensional bodies to rotate relative to each other about a fixed axis and permits no other relative motion.

It is, by far, the most common joint in robotic and other mechanical systems, and more complex linkages are often constructed by composing simple rotational joints.

F1 Ateeb Ravi 02.12.21 D11

 

F1 Ateeb Ravi 02.12.21 D12

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