DC motor takes worm gear onboard
An
EMS product story
Edited by the Engineeringtalk editorial team
Dec 17, 2004
The Valeo DCK31 series DC motor range available from EMS has been extended with the addition of a new motor gearhead.
The Valeo DCK31 series DC motor range available from EMS has been extended with the addition of a new motor gearhead.
The assembly comprises a 24V DC motor fitted to a worm gearhead.
The worm gear is cut into the motor shaft, and gives a ratio of 48:1 when combined with the large worm wheel.
Nominal torque is 4Nm at 160rev/min, with up to 20Nm possible at lower speeds and intermittent duty cycles.
For speed and position control a Hall-effect encoder is built in to the gearhead, and gives one pulse per revolution of the motor - 48 pulses per revolution of the gearhead output shaft.
Also built into the gearhead are electrical noise suppression components.
To reduce costs the gearhead housing is moulded in zinc, which has reduced the number of machining operations necessary as zinc offers a more precise result than using the conventional aluminium.
The worm gear has been redesigned to improve the gear mesh, the strength and the resistance to hard end-stop.
The motor is designed for automotive use, but due to its robust design is offered by EMS to industrial and other non-automotive markets, but benefits from the economy of scale achieved within the automotive production environment.
The DCK31 Series is aimed at a broad range of applications including: door openers; medical devices; agricultural machines; furniture actuation; and smart building technology.
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