The Hooke’s joint is made up of ____________________?
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Answer: A. two forks
Explanation
A standard Hooke joint requires two distinct yokes to connect angularly misaligned rotating drive shafts together properly. The two forks attach to the driving and driven shafts respectively at right angles around a central cross. Physical examination of any universal joint confirms the presence of exactly two forks linked by a spider. A Hooke joint, commonly called a universal joint, transmits rotational power between intersecting non-parallel shafts. The assembly consists of two yokes, a central spider or cross, and four needle roller bearings for smooth motion. Cardan originally analyzed this mechanical linkage, establishing mathematical descriptions for its varying angular velocity ratios.
A single fork is mechanically insufficient to connect two separate shafts across a central pivoting cross member. Having three or more forks would over-constrain the simple cross-pin geometry of a standard universal joint assembly. Alternative constant velocity joints use different internal ball and cage arrangements rather than traditional yokes.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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