Tutorial 12: Design a Spatial Mechanism

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Tutorial 12: Design a Spatial Mechanism

Design of a Spatial Mechanism - very common to Packaging Machines

We will design a kinematic-chain that is frequently found in packaging machines. The input and output Parts of the kinematic-chain are on Mechanism-Planes that are perpendicular(⊥) to each other.

Design a Spatial Mechanism

1.About the Ball-Joint and Connecting-Part

2.Add a Part and two Ball-Joints to make the Part a Connecting-Part

3.Edit the Length of the Connecting-Part

4.Edit the 'diameter' of the Connecting-Part

5.Edit the 'diameter' of the Ball symbol

6.Edit the offset of the Ball-Joints from each Mechanism-Plane

Note: In a machine, the Ball-Joint is usually a Rod-End bearing or a Ball and Socket bearing. A Rod-End bearing is called a Heim-Joint in North America or a Rose-Joint in the UK.


All Dyads have two Parts and three Joints.

It is helpful to think of the Dyad Structure as

Joint - Part - Joint - Part - Joint

A Dyad is known by its three Joints. It does not reference the Parts

The middle joint in the dyad connects the two Parts together.

The other two Joints connect each of the Parts to different Parts.




See also: Ball-Joint Mounting Configurations.

btn_delkeywordThe Ball-Joint and Connecting-Part
btn_delkeywordPrepare Kinematic-Chain 1
btn_delkeywordPrepare Kinematic-Chain 2

Add the Connecting-Part and two Ball-Joints.

btn_delkeywordAdd a Connecting-Part and two Ball-Joints
btn_delkeywordEdit the Length of the Connecting-Part
btn_delkeywordEdit the Radius of the Connecting-Part
btn_delkeywordEdit the Ball-Joints