초록 ▼

A motor with an integral magnetic torque limiting coupling which maintains the relative positions of the motor rotor and a coupling output shaft thereof when the rotor is rotated, and transmits up to a predetermined amount of torque during such rotation, which exceeds the maximum sustained torque wh

A motor with an integral magnetic torque limiting coupling which maintains the relative positions of the motor rotor and a coupling output shaft thereof when the rotor is rotated, and transmits up to a predetermined amount of torque during such rotation, which exceeds the maximum sustained torque which the motor develops during normal operation so as not to interfere with the torque transmission during normal operation of the motor while allowing the output shaft and rotor to slip relative to one another to prevent transmitting a torque above a maximum safe torque which may be safely applied to a gear train to be driven by the motor, thereby preventing damage to the gear train by the motor in the event of a sudden change of speed of the gear train. The rotor of the motor is rotatably supported by bearings in the motor on journal extensions located beyond the ends of the rotor, so as to enable the magnetic coupling to have a length comparable to that of the rotor, in order to readily attain the necessary magnetic strength of the coupling.

대표청구항 ▼

An apparatus for isolating momentum of a motor from a drive means through which the motor drives a movable load to prevent the motor from damaging the drive means when there is a sudden change in speed of the movable load and drive means causing a torque on the drive means above a maximum torque whi

An apparatus for isolating momentum of a motor from a drive means through which the motor drives a movable load to prevent the motor from damaging the drive means when there is a sudden change in speed of the movable load and drive means causing a torque on the drive means above a maximum torque which may be safely applied to the drive means, said apparatus comprising a magnetic torque limiting coupling for transferring torque between said motor and said drive means having first and second rotatable members for driving connection with said motor and said drive means, respectively, said first and second members being located in spaced relationship and rotatably coupled to one another by magnetic means, said magnetic means having a magnetic strength which exceeds the maximum sustained torque which said motor develops during normal operation so as to transfer torque without interruption during normal operation of the motor but which permits slippage to occur between said first and second members of said coupling to prevent a torque above said maximum safe torque from being applied to said drive means by said motor to thereby protect the drive means from being damaged by the motor in the event of a sudden change of speed of the movable load and the drive means.