Internal geneva mechanism
Aim:- To create a 3D model of internal geneva mechanism using solid works.
Theory:- 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
Fig:-Internal Geneva Mechanism
Objectives :-The following are the objectives
- Create 3D models for driver and driven wheels.
- Perform motion analysis by rotating the driver wheel at 10rpm.
- Obtain the following plots
- Contact force (between driving and the driven wheel) as a function of time.
- Angular Displacement of the driven wheel.
- Compare the contact forces with and without "Precise contact"
- Show image for precise contact selection
Procedure:- Follow the fpllowing points to complete the 3D Animation of Internal geneva mechanism
1. First we should sketch the driving wheel with dimensions that are given to us.
After sketching Extrude the required part as shown in the drawing.
The following is the figure of driving wheel
2. We should sketch the driven wheel with dimensions that are given to us
After sketching Extrude the required part as shown in the drawing.
The following is the figure of driving wheel
Assembly design:-
The following are the steps to assemble the parts of internal gennneva mechanism
- First open a new assembly tab in solid works
- Then call driven wheel and driving wheel parts
- Now right click on the part that you have called first('driven wheel') and select the float option
- Now visible the hidden axis of the parts.
- Now mate the following parts with the planes
- Mate the driving wheel and driven wheel with suitable distance.
Plots:-
1.10 rpm
The plot of contact force between driving wheel amd driven wheel without "Precise contact" is shown
The plot of angular displacement of driven wheel is shown below
The plot of contact force between driving wheel amd driven wheel with "Precise contact" is shown
2.20RPM
The plot of contact force between driving wheel amd driven wheel without "Precise contact" is shown
The plot of angular displacement of driven wheel is shown below
The plot of contact force between driving wheel amd driven wheel with "Precise contact" is shown
Comparing the contact forces with and without "Precise contact"
Result:-The files of the Internal geneva mechanism are uploaded on google drive link is given below
https://drive.google.com/drive/folders/1abmrN7X4ah3xrSLbBeo0btyHUmfrN9q4?usp=sharing
The animated video of internal geneva mechanism is uploaded in youtube. the following link is given below