The strain wave gearbox is a high-precision reduction gear used in applications requiring compact designs and high positioning accuracy, such as robotics or aviation. The rolling bearings in this system play a central role: they reliably support the flexspline and the output shaft and ensure the exact alignment of the components. Under conditions such as changing loads, high torques, and limited installation space, the bearings ensure smooth running, minimize friction, and contribute significantly to the service life and performance of the entire gearbox.
Typical application requirements
Flexible bearing:
- Small cross-section ball bearing
- Static deformation of the inner ring
- Dynamic deformation of the outer ring
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Operating conditions:
- Drive rotational speed (According to the customer requirements)
- Wave-like deformation on the inner ring, which is also transferred to the outer ring.
- Vibrations
- Gear forces
- Both rings rotate, but in different directions.
Bearing requirements:
- Operating hours: According to the customer requirements
- Flexible rings (low stifness)
- Transfer of deformation from the wave generator to the flexspline.
Our development services:
The development of roller bearings for strain wave gearboxes requires the highest precision and engineering expertise. Due to the extreme demands on positioning accuracy and compact design, we rely on advanced simulations and optimized geometries. The goal is to create bearing solutions that ensure minimal friction and a long service life under high loads and limited installation space.
Our typical development workflow for this application area:
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Analysis of current status
- System mechanics analyses
- Simulative system evaluation (digital twin)
- Identification of possible failure mechanisms
Lifetime assessment and optimization
- Selection of critical parameters
- Simulative system assessment
- Variation of design parameters
Deformations and stresses in bearing rings
- Selection of critical parameters
- Simulative system evaluation (FEM simulation)
- Variation of design parameters
Prototype and series production
- Drawings and 3D data
- Manufacturing partners
- Delivery of samples and approval documentation, e.g., EMPB/PPAP