1:24
Aircraft landing gear with bearing friction
How much does joint friction change the cylinder force during extension and retraction? ASOM shows the force with and without friction in one diagram.
Example · Medical technology · ASOM
Hospital bed with spindle drives
Two drives adjust a hospital bed: one the height, the other the tilt of the foot section. ASOM shows which forces act in the drives, joints and bearings.
3:13
The task
Two drives, friction in all joints
The example shows part of the kinematics of a hospital bed or an examination table. In practice, spindle drives are often used here. The task is to find their drive forces as well as the joint and bearing forces over the entire motion sequence, including the sliding friction, which depends on the joint forces.
What ASOM shows here
- Each spindle drive can be combined with a supporting pressure spring if required; constraints make both follow every change.
- Drive, joint and bearing forces continuously over the entire motion sequence, with Coulomb sliding friction in all joints and guides.
- Height and foot section move in real time; diagrams and element shadows update automatically as they do.
Your benefits
Drive forces with friction, right from the start
You design drives and bearings with friction taken into account – as early as the conceptual design stage.
Choose the right drives
You know the drive forces, including friction, over the entire motion sequence before you select drives. More on force calculation
Variants without rebuilding
Constraints keep the model consistent; you try out other pivot points directly. More on constraints
Design bearings reliably
The bearing forces with friction show what joints and guides have to withstand.
More examples
All example videos
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Truck lift gate
Two hydraulic cylinders open the gate and raise and lower the platform. ASOM combines the partial movements into one motion sequence and calculates the bearing forces with friction.
4:18
Joint friction
How much force is lost to friction? With a pin diameter and a friction coefficient for each joint, you compare manual and joint forces with and without friction.
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