Started Motionsolve recently and need help in building a model especially bearing.

Purna

Description: I'm working on a differential unit with disconnect to check the ratcheting behavior while engaging.

I have a piston, Spring plate, ball bearing and sleeve. The assembly for the differential disconnect is like, the solenoid pushes the piston, the piston applies force on bearing, the top ring of bearing pushes the spring plate (which gets compressed with spring with force applied) and the bottom bearing ring is sitting on the step slot of sleeve (meaning it can push the sleeve as the piston did).. now this sleeve will engage the bevel gear of the differential (this is disconnect network). and while releasing, the compressed spring helps the piston and solenoid back to its position. I have modeled to an extent with the knowledge I have but I'm unable to transfer the force/moment through bearing. How can I mimic the bearing model in Motionsolve? Help me with any inputs.

Product/Topic Name : Differential unit with disconnect (Ratcheting behavior), VERSION 2024.1

Orestis_YB

Hello @Purna,

if you are new to Multibody modeling I would strongly suggest to first go thought our MotionView Introduction training in order to familiarize yourself with the several modeling entities. An easy way to model a bearing is to use a revolute joint. This will constrain all relative motions of Body I with respect to Body J except for the rotation about the spin axis. Therefore your translational force will be transferred from the piston to the spring plate. If there is also relative translational movement between piston and spring plate (i.e a gap) you can use a cylindrical joint instead and then use a force using BISTOP() function in order to mimic a simplified contact. You can also use contacts but keep in mind that due to your complex geometries this will drastically increase the simulation time. Here are some best practices if you want to define Contacts in MotionView.

Hope this helps!

Best regards,
Orestes