Precision Gears for Mobile Robotics
Mobile robotics is a key driver of automation – not least against the backdrop of rising cost pressures, a shortage of skilled workers, and the need for scalable production and logistics solutions. It expands traditional automation systems with location-independent functions and opens up new possibilities in sectors such as intralogistics, construction, agriculture, and services. We’ll show you the role precision gearboxes play in this context and the requirements they must meet.
Precision gearboxes in mobile robotics must resolve a trade-off between performance and factors such as energy consumption, cost, scalability, installation space, and weight. Requirements vary significantly depending on the application: While systems like AGVs typically operate under controlled and highly predictable conditions, other mobile robots are often exposed to higher and more fluctuating loads. Gearboxes must therefore be tailored to the specific application profile.
Key requirements:
- High torque density with low weight
- High efficiency for energy-efficient operation, even in the partial load range
- Low backlash for high positioning accuracy
- High torsional rigidity for precise power transmission
- Compact design for limited installation space
- High reliability and long service life
- Low maintenance requirements
- Good reversibility depending on the application, especially for interaction with humans
- Sufficient overload capacity against load peaks
Advantages of precision gears in mobile robotics
The main advantage of precision gears lies in the combination of compact design, high precision, and high load capacity – especially compared to direct-drive solutions, which often require a larger installation space when high torque is required. Cycloidal gears are particularly suitable for applications with high loads and high requirements for rigidity and shock resistance. Strain wave gears offer advantages in lightweight and compact drive solutions, as well as in applications where zero backlash is required.
Advantages at a glance:
- High gear ratios with a small installation space
- High repeatability for positioning and handling tasks
- Precise transmission of torque and force
- High power density
- Easy integration into compact axis and joint units
Applications and fields of use
Precision gearboxes are in demand in drive, steering, lifting, and joint drives where torque and speeds must be transmitted precisely, reliably, and in a space-saving manner.
Applications:
- Automated guided vehicles (AGVs) and autonomous mobile robots (AMRs) in logistics and production
- Mobile manipulators, e.g., robotic arms on mobile platforms
- Indoor service and assistance robots
- Humanoid and legged robots
- Mobile medical assistance and transport systems
- Exoskeletons for medical, industrial, or assistive applications
- Inspection and maintenance robots for facilities or infrastructure
- Outdoor robotics in agriculture, construction, and environmental monitoring
- Robotic systems for security and hazardous operations
The advantages of actuators
The performance of a drive system is not determined solely by the gearbox, but by the interaction of the gearbox, motor, power electronics, and sensor technology. A holistic design is crucial for optimally coordinating all components. Consequently, integrated actuators—in which these components are combined into a compact unit—are increasingly being used. This reduces interfaces, simplifies integration, and improves system performance.
Condition Monitoring and Predictive Maintenance
Condition monitoring and predictive maintenance are also gaining importance in mobile robotics. By collecting operating data such as torque, temperature, or vibration, wear conditions can be detected early and maintenance measures planned specifically. This increases availability and reduces operating costs.
Solutions from Nabtesco
Our portfolio ranges from small backlash-free strain wave gears to highly rigid cycloidal gears and covers a torque range from 4.5 to 70,000 Nm. This enables the realization of both compact lightweight robots and applications with high loads. These solutions are used in numerous mobile robotics applications, including intralogistics, autonomous mobile systems, and robotic assistance and handling systems. With the Mecanum wheel, we also offer a fully integrated drive unit for omnidirectional mobility.
Our solutions:
- Backlash-free strain wave gears
- Compact short gears
- Heavy-duty cycloidal gears
- High-performance actuators
- Digital drive concepts
- Mechatronic systems
- Drive units with Mecanum wheels
- Standard and custom solutions
Increasing demands
As automation advances, the demands on compact robotic systems in terms of power density, precision, and service life are increasing. Highly integrated drive solutions are therefore becoming increasingly important. Precision gearboxes play a central role in this context, as they form the basis for powerful and compact drive systems and thus significantly support the further development of mobile robotic systems.
Would you like to learn more about the benefits of our precision gearboxes for mobile robotics? Our experts are here to support you with your project. Contact us now!
