VM-TL Cyclo Drive Reducer Cycloidal Gear Motor Torque Limiter Speed

• Safe Unattended Operation

Reliable torque limiter response to overload cuts motor power automatically, stopping the driven machine.

• Cost Effective Machine Design

The limit set on a Cyclo® unit equipped with a torque limiter is more accurate and reliable when compared to conventional torque limiters.Consequently, use of a lower safety factor on auxiliary equipment maybe considered, which will decrease the cost of the entire system.

• Bi-directional Torque Setting

Usually the torque limiter is set for only one direction of slow speed shaft rotation; however, if requested, it can be set for bi-direction.

• Easy Set Point Adjustment

The factory sets all calibration levels. No further adjustments are required. However, you can make an adjustment within +25% of set torque by rotating the adjusting bolt that changes restraint spring load and set point.

• Enclosed Structure

The torque limiter is enclosed to keep out gas, dust and other environmental contaminants. Combines with Other Protective Devices The torque limiter may be connected to another alarm system (i.e., buzzer and/or lamp) as an option to warn of power failure.

• High Precision

The basic component of the torque limiter is a high-precision coil spring. Under load, the spring deflects in proportion to torque. Repeatability of the torque set point is +5% to +10%.

• Instantaneous Overload Response

Overload response time is much faster than comparable electrical systems.

• Option to Withstand Start-up Torque

The torque set point may optionally withstand start-up torque by bypassing the limit switch current.

Output torque on the slow speed shaft (4) of the Cyclo drive is transmitted by means of a Cycloid disc (3) to the ring gear housing (2), which is free to rotate in the fixed frame (1). Under constant load, the lever (6) fitted in the ring gear housing (2) is held in a fixed position by the preset force of the coil spring (5). When load on the slow speed shaft (4) is increased, the ring gear housing (2) rotates in the opposition direction to the slow speed shaft (4) causing the lever (6) to press against the coil spring (5). When the output load exceeds the preset value, the lever (6) actuates

the limit switch (7), instantaneously cutting motor power. After the motor stops, and the cause of overload eliminated, the force of the coil spring (5) returns the lever (6) to its original neutral position.

 

The torque limiter mounts on the first stage housing of double reduction units (example: on frame of 8135 for double reduction size 8195DB) and on the second stage housing of triple reduction units (example: on frame 8135 of triple reduction size 8195TD).