Internal Geneva Mechanism motion analysis using solidworks

Motion analysis of internal geneva mechanism

Aim

To design and study the motion analysis of the internal geneva mechanism.

Introduction

The Geneva drive or Maltese cross is a gear mechanism that translates a continuous rotational movement into intermittent rotary motion.The rotating drive wheel is usually equipped with a pin that reaches into a slot located in the other wheel (driven wheel) that advances it by one step at a time. The drive wheel also has an elevated circular blocking disc that "locks" the rotating driven wheel in position between steps.

An internal Geneva drive is a variant on the design. The axis of the drive wheel of the internal drive can have a bearing only on one side. The angle by which the drive wheel has to rotate to effect one step rotation of the driven wheel is always smaller than 180° in an external Geneva drive and always greater than 180° in an internal one, where the switch time is therefore greater than the time the driven wheel stands still

3d parts:

Driver part

Driven part

Assembeled part

Plots obtained:

60 frames per second with precise contact off with 10rpm

contact force

angular displacement:

60 frames per second with precise contact with 10rpm

contact force

angular displacement

20rpm with 120 frames per second:

contact forceangular displacement

conclusion:

Thus the required graphs are drawn.