New robot gears with large hollow shafts and low weight
24 October 2018
Precision gearing specialist Harmonic Drive UK has released a new series of robotic gears ideal for highly dynamic applications, such as robotic axes. The new SHG Series Units are a direct response to the growing focus on robotics in industry.
The increased use of robotics in heavy lifting applications demands gears that can both resist heavy loads and provide zero backlash. The SHG Series offers high resistance to shock loads, due to its 30 per cent increase in collision torque, compared to previous models. This, paired with the series’ lifetime precision and zero backlash, make it perfect for industrial robot uses.
The SHG Series offers 30 per cent higher torque values when compared with other strain wave gears with similar dimensions. This ensures increased dynamics and reduces cycle time for positioning tasks. When this is paired with the components’ increased collision torque, it allows industrial robots to provide precise movement, even when lifting and moving heavy loads.
The SHG Series Units are available in ten sizes, with gear ratios of 50, 80, 100, 120 and 160, offering repeatable peak torques from 23 to 3419 Nm.
“Robots are a staple of industry, they permeate every process and are indispensable in achieving efficiency and high levels of production. The SHG Series was made with industrial robots in mind and the three versions available offer a high degree of flexibility to design engineers,” explained Graham Mackrell, managing director of Harmonic Drive UK.
“While their compact design and high torque density means there is no compromise in size versus use. The SHG Unit Series comes in SHG-2UH, 2SH and 2SO versions.
“The 2UH has a mounted and fully sealed hollow shaft, through which to feed supply line, shafts or cables. in contrast the 2SH and 2SO are simpler units, composed of the components and the output bearing, reducing maintenance. The hollow shaft is used directly as the rotor for the drive motor reducing the amount of complex parts. As a result, SHG Unit Series are ready for both simple and complex uses.”
As industrial robots become more complex, it is even more important to make sure good transmission is maintained. The SHG Unit Series uses the existing housing structure to support the bearings from the input shaft. As such, there is no need for a separate input and output flange, reducing overall weight. Less weight allows for more complex design, which in turn paves the way for more complex uses. This makes the components ideal for delicate and precise moving axes in industrial robots.
The SHG-2SO Unit has a wave generator with an input bore and is ideal for the direct attachment of a servo motor, making it ideal for creating a completely electromechanically actuated robot. This will decrease the reliance on mechanical actuation, which is less precise than electromechanical actuation.
For more information, please contact:
Graham Mackrell or Gail Softley
Staffordshire Technology Park
Tel: +44 (0) 1785 245190