DC Motor with Right Angle Reducer

This OEM produces automated smoke curtains which lower at elevator doors in the event of a fire. They had tested three other brands of gearmotors to operate their curtains, and all had failed.

The Challenge

This is the Challenge content.

• A Gearmotor which could operate in a wide range of curtain configurations
• High reliability especially after prolonged periods of inactivity
• Low cost to maintain competitiveness
• Small package for a tight envelop
• Power to be applied at a right angle to the motor

The Solution

This is the Solution content:

• A DC (permanent magnet DC) motor with reduced length
• Right-angle worm gear reducer with 30-1 ratio
• Composite reducer housing
• Non-replaceable brushes

The Groschopp solution resulted from extensive work with the OEM, and also with a manufacturer of cast composite material to create a strong, but less expensive motor reducer housing. The intermittent duty cycle permitted cost optimization with a smaller motor and use of non-replaceable brushes.