Because there are no gears, direct drives , offer numerous advantages over traditional motor-transmission combinations, such as greater compactness, high energy efficiency and low service costs.
The ball screw with driven nut is used when it is necessary to convert a rotating movement into a linear movement, in which case the screws can be moved axially through the hollow shaft motor. This allows a high level of positioning precision with high traversing speeds and a high torque. The important thing when connecting hollow motors is that the machine construction absorbs the axial forces produced. No axial forces should act on the motors.
All of the hollow shaft connections are suitable for very high torques. They can meet virtually any requirements, from high positioning precision to rapid assembly to compactness, according to priority. The assembly elements named are not part of the supply scope of Baumüller motors, but we will be happy to refer you to a supplier that we trust.
With a torque motor as a kit motor you are particularly flexible for integration.
The kit motor consists exclusively of the active parts of the motor, i.e. the rotor and the stator without the housing and bearing. This allows an especially flexible integration with the machine.
The version with thrust bearing is an industry-specific version of the torque motors specially designed for the plastics industry. Thrust-bearing motors were specially designed for use in extruders. The extruder screw is directly coupled here with the blind hole of the motor, thereby exposing the motor to high axial forces. These forces are absorbed by the integrated spherical roller bearings, which protects the motor from damage.
The DST2 torque motors are additionally available with solid shaft or also with blind hole shaft. Although the solid shaft reduces the stiffness in the drive train, it simplifies assembly, is compact, has positive damping properties and can e.g. have a balancing effect with offset or production tolerances. Advantages of blind hold shafts are that the machine spindles can reach into the motor and a coaxial sensor mount and thus the use of a safety sensor is possible.
The diversity of assembly options simplifies the change from high-loss hydraulic solutions and classic motor-transmission combinations to direct drives. Contact us for further information on the integration options with our high torque motors.