Innovative construction details for special requirements

Application-specific gearboxes from Neugart for delta and other robot drives Innovative construction details for special requirements

2024-12-01 Source: Press release | Translated by AI 2 min Reading Time

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Neugart Schweiz AG

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Taiwan Machine Tool & Accessory Builders' Association (TMBA)

Wuxi InfiMotion Technology Co., Ltd.

High dynamics, great precision, special mechanical loads: Manipulators in robotics must meet extreme requirements, and so must the gearboxes in the drives. One answer to these demands can be application-specific gearboxes like the NDF from Neugart. For even more unusual robotics tasks, the manufacturer develops individual special solutions.

Special gearboxes are used where standard or modified standard gearboxes reach their limits. Their development takes place in close dialogue between manufacturer and customer.(Image: Neugart GmbH) — Special gearboxes are used where standard or modified standard gearboxes reach their limits. Their development takes place in close dialogue between manufacturer and customer.
(Image: Neugart GmbH)

The precision of the gearboxes used also plays an important role in the positioning accuracy of a robot. Essential factors include low backlash and high torsional stiffness: The lower the backlash of a gearbox, the more accurately an object can be positioned. But aspects such as reduced inertia, low breakaway torque, or an application-specific adapted sealing concept also play a role in determining how precisely a gearbox operates, even at high dynamics.

Neugart demonstrates how such a powerful solution can look with the NDF flange gearbox. This features, for example, a particularly torsionally rigid planetary carrier cage and specially designed planetary gears. The backlash of the gearbox gearing is limited to less than 1 arcminute as standard. The positioning accuracy is correspondingly high. This reduces the system's readjustment to a minimum and shortens the robot's cycle time. Moreover, the NDF is characterized by a whole range of other special features on both the input and output sides.

Design features on input and output

In the input stage, an aluminum clamping ring reduces the inertia on the clamping system. A low-friction radial shaft seal also reduces the breakaway torque. This "Dynamic Drive System" enables extremely fast changes in direction and simultaneously relieves the motor. Therefore, less force is needed to drive the gearbox, allowing for the use of a smaller and lighter motor.

As another measure, the input stage of the NDF is equipped with three planet gears, which keeps inertia low and reduces friction in the fast-rotating input stage. The gearbox is thermally relieved. Less heat is generated, especially in the fast-rotating gearbox drive. Additionally, splash losses in the oil bath are reduced.

Predestined for use in delta robots

With these properties, the NDF is particularly ideally suited for use in delta robots. For example, Marco Ebner from Syntegon Packaging Systems AG in Beringen, Switzerland, is also convinced of this: "The reliability of the gearboxes is an absolute must for us in order to meet the expectations of our customers to their fullest satisfaction. From our point of view, the NDF gearbox from Neugart offers the best overall package of performance, quality, and cost efficiency. During the development of our new RPP machine platform, we worked very closely and intensively with the company Neugart and thus found the ideal gearbox solution for us."

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