Question

Which translatory joint in a robot configuration is known as a sliding joint?

• A. Revolute Joint
• B. Prismatic Joint
• C. Cylindrical Joint
• D. Spherical Joint

Hint:

\textbf{Prismatic Joint = Linear (sliding) motion}.
Think: Piston movement.

Answer 1

The Correct Option is B

Concept: In robotics, joints are classified based on the type of motion they allow. Translatory joints permit linear motion, unlike rotational joints.
Step 1: Understanding translatory motion.
A translatory (linear) joint allows movement along a straight line without rotation.
Step 2: Identifying the sliding joint.
The Prismatic Joint allows linear sliding motion between two links, similar to a piston moving inside a cylinder. Hence, it is also called a sliding joint.
Step 3: Eliminating incorrect options.

• Revolute Joint allows rotational motion.
• Cylindrical Joint allows both rotation and translation.
• Spherical Joint allows multi-axis rotation.

Conclusion:
Thus, the correct answer is Prismatic Joint.