Higher Pair Contact Explained
In mechanical engineering and kinematics, elements are classified based on their contact type.
- Lower Pair: Formed when the surface of one element entirely touches the surface of another. This typically involves surface contact, like a hinge (pin in a hole) or a slider (block in a slot).
- Higher Pair: Formed when the elements have contact along a line or at a single point. This involves relative sliding motion between the surfaces.
Understanding Higher Pair Contact
A higher pair is characterized by the contact occurring along a line or at a point. Examples include:
- A cam and its follower (often line or point contact).
- Gear teeth meshing (line contact).
- A ball bearing (point contact).
The defining feature distinguishing it from a lower pair is the nature of the contact geometry and the type of relative motion allowed.
Conclusion on Contact Type
For a higher pair, the contact established is specifically point contact (or line contact, which can be viewed as infinitesimally separated points).
Therefore, the correct type of contact is point contact.
Important Questions from Classification of Kinematic Pair
Which of the following pairs is NOT an example of a lower pair?
When two elements of a pair are connected such that they can only turn about a fixed axis of another elements, they are called ______.
The lead screw of a lathe with nut forms a:
Davis steering gear consists of _____.
A cam and follower combination belongs to the category of ____________.
