Parallel and push-pull linkages
I can make parallel and push-pull linkages.
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Lesson details
Key learning points
- A parallel linkage contains fixed pivots and allow movement back and forth and side to side.
- A push-pull linkage allows the input and output levers to move in the same direction.
Keywords
Parallel linkage - a linkage that creates movement in the same direction using two pairs of levers
Input - something that goes into a system
Output - something that comes out of a system
Push-pull linkage - a linkage that uses short levers to push and pull three other levers in the same direction
Common misconception
Push-pull and parallel linkages are made of more than one lever.
Levers can be joined together to form a linkage. A parallel and push-pull linkage is made up of multiple levers.
Equipment
Please see the additional materials for the equipment and resources
Content guidance
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.What is another word for a fulcrum?
Q2.Which of the following describes a lever?
Q3.Complete the following sentence. A reverse motion linkage creates movement that is ...
Q4.A reverse motion linkage contains ...
Q5.Match the definitions
starts the mechanism
the outcome of the mechanism
a set of moving parts that make something happen
a mechanism connecting levers together
Q6.Which of the following is the word used to describe a mechanism that connects levers together?
Assessment exit quiz
6 Questions
Q1.To create movement, a parallel linkage must have ...
Q2.How does a parallel linkage move?
Q3.Which of the following explanations are the best description for parallel linkages?
Q4.How many fixed pivot points does a push-pull linkage usually have?
Q5.Match the words to the definition.
a free moving point that joins two levers together
a point that joins a lever to one place
the motion used to start a mechanism
the motion caused by the input
Q6.What happens to the input and output movements on a push-pull linkage?
