Internal Geneva Mechanism
Aim: Simulation of internal geneva mechanism using solidworks
Objective:
1) 3D model for Internal Geneva Simulation
2) Motion Analysis with driving wheel rotating at 10rpm
3) Contact Force and Angular Displacement of driven wheel
4) Comparision of results with and without "Precise contact"
Procedure:
1) 3D model is developed based on given drawings:
- Driving Wheel:
- Driven Wheel:
2) The parts are assembled based on the dimensions determined using the drawings:
- For the pin to be located correctly the centers of the wheels must be placed as shown in the figure below
- Where the ends of construction line in green are the centers of the wheels
- This will allow the pin to enter next leg of the driven wheel after exiting the first
3) The motion of the wheels is to be constrained to rotation about their axes.
4) A motor is to defined at the axis of driving wheel at required rpm
5) Contact has to be established between the wheels and the simulation is ready to be run.
6) After running the simulation required plots are to be extracted.
7) Precision contact available in the settings can be used to determine the contact forces more accurately.
- Precise Contact Option:
Results:
1) Angular Displacement of the driven wheel:
2) Angular Displacement of the driving wheel:
3) Contact Force Plots:
4) Animation:
Assembly_Dynamics.avi
5) Comparision between results generated with and without contact pression at 10RPM
Discussion:
1) The angular displacement plots show a liner trend for the driving wheel, the driven wheel describes curves during motion along with intervals of time at rest.
2) The number of peaks increased linearly with RPM as expected.
3) Precision enabled study shows higher contact forces as compared to one without.