relation
(Dimensions/Relations toolbar) and the Belt/Chain
tool (Blocks toolbar) enable you to use layout sketches
to create these mechanisms:The Traction relation
(Dimensions/Relations toolbar) and the Belt/Chain
tool (Blocks toolbar) enable you to use layout sketches
to create these mechanisms:
Multiple gear sets
Cable and belt pulleys
Chain sprocket systems
The Traction relation creates relative rotation constraints between sketch entities by adding a tangent relation between blocks that represent pulleys or sprockets.
To add traction relation:
Sketch multiple circular or linear entities to represent gears, rack and pinion mechanisms, etc.
Make each entity a separate block.
Add relations and dimensions to eliminate motion not related to the mechanism.
Limit the use of the Fix relation, for example to the center
of one circle. Use horizontal and vertical relations, dimensions, or construction
geometry to locate the centers of additional circles or sketch entities.
Adding multiple fix relations potentially restricts the model's degrees
of freedom.
In the graphics area, select two sketch entities to which you want to add relative rotation constraints.
To use the belt chain tool:
Sketch multiple circular entities to represent belt members.
Although not required, making
each entity a block is recommended.
Click Belt/Chain
(Blocks toolbar) or Tools,
Sketch Entities, Belt/Chain.
Add relations and dimensions to eliminate motion not related to the mechanism.
Add belt members and belt to create the mechanism.
