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Strain wave gearhead Strain wave gearheads make use of the prin- ciple of elastic deformation and the flexibility of one component, known as the flexspline. The centerpiece of the strain wave gearhead is the wave generator, an elliptical shaft. This shaft deforms the flexspline, a thin-walled flexible ring that meshes with a rigid outer ring (circular spline). This deformation generates radial mo- tion that is converted into rotational motion. − Zero backlash and precise
Ultra-performance gearhead The UP (Ultra Performance) gearhead uses rolling bearings in all stages. This results in a very high efficiency and thus in a higher load capacity, as well as back-drivability even with high reductions. High power gearhead Especially high output torques in the output stage of planetary gearheads can be achieved through the following measures − Use of ceramic components − 4 instead of 3 planet gears in the output stage − Additional motor-side support of the output stage − Reinforcement of the output bearings Heavy duty gearhead The HD (heavy duty) gearheads are character- ized by their robust construction. The use of stainless steel and optimized welding joints enable use under the most extreme conditions. Reduced backlash gearhead The reduction in backlash is achieved through a preloading of the planet gears in the output stage. Despite the wear that occurs during operation, the gearhead backlash remains constantly low, unlike for gearheads in which the backlash reduction is achieved by low- tolerance manufacturing and material pairing.
Sterilizable gearhead Sterilizable gearheads are characterized by the use of stainless steel and special lubricants. The bearing of the output shaft and the con- nection to the motor are designed so that fluid leaking into the gearhead is inhibited.
Koaxdrive Noise reduction
Noise is primarily generated in the input stage of the gearhead. The following measures can help to reduce noise: − Smaller input speeds and thus smaller relative velocity of the tooth flanks − Input stage with plastic gears − Use of a Koaxdrive gearhead The quiet “Koaxdrive” combines worm and planetary gearing. In the first stage, a sepa- rately mounted worm drives the three offset planetary wheels which then mesh in the specially toothed internal geared wheel. All further stages are designed as a normal planetary gear: − low noise − high reduction ratio in the first stage − other properties as planetary gears
− High torsional rigidity − High reduction ratios − Large hollow shaft possible
Technology – short and to the point 75
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