Clutch motor with electromagnetically operated auxiliary braking means

Claim 2

In a clutch motor comprising an electric motor, an output shaft connected to said electric motor for transmitting power from said electric motor to a load, a movable clutch wheel disposed in fixed relationship with said output shaft to transmit power from said electric motor to said output shaft during the normal mode of operation of the clutch motor and a stop plate capable of engaging said clutch wheel to stop the rotational movement of said output shaft, the combination of means for placing said clutch wheel in a partly clutched mode of operation before said output shaft completely stops rotating, and auxiliary brake means for applying a braking action to said clutch wheel when the latter is in the partly clutched mode of operation.

Claim 3

A clutch motor as claimed in claim 1 wherein said means for placing said clutch wheel in the partly clutched mode of operation includes electromagnet means, and wherein said auxiliary brake means are fixedly mounted on said output shaft to be operative in response to the energization of said electromagnetic means.

Claim 4

In combination: a rotationally driven input member rotatable about a longitudinal axis; a stationary braking surface spaced apart from said input member along said longitudinal axis; a clutch wheel having friction facings on each side thereof movably disposed between said input member and said braking surface; an output member connected to said clutch wheel for movement therewith; mounting means mounting said clutch wheel and output member for both rotary movement together about said longitudinal axis and translational movement together along said longitudinal axis between a first working position wherein said clutch wheel frictionally engages with said input member to effect rotation of said output member at a given speed and a second working position wherein said clutch wheel frictionally engages with said braking surface; moving means for effecting movement of said clutch wheel to said first and second working positions; and means operable when said moving means has moved said clutch wheel to said second working position for effecting movement of said clutch wheel to said first working position while concurrently applying a braking action to said clutch wheel to effect rotation of said output member at a speed less than said given speed.

Claim 5

In combination: a rotationally driven input member rotatable about a longitudinal axis; a stationary braking surface spaced apart from said input member along said longitudinal axis; a clutch wheel having friction facings on each side thereof movably disposed between said input member and said braking surface; an output member connected to said clutch wheel for movement therewith; mounting means mounting said clutch wheel and output member for both rotary movement together about said longitudinal axis and translational movement together along said longitudinal axis between a first working position wherein said clutch wheel frictionally engages with said input member to effect rotation of said output member at a given speed and a second working position wherein said clutch wheel frictionally engages with said braking surface; moving means for effecting movement of said clutch wheel to said first and second working positions; and means operable when said moving means has moved said clutch wheel to said second working position for effecting movement of said clutch wheel to said first working position while concurrently applying a braking action to said clutch wheel to effect rotation of said output member at a speed less than said given speed.

Claim 6

A combination according to claim 3; wherein said last-mentioned means comprises electromagnetic means for electromagnetically effecting movement of said clutch wheel to said first working position, and braking means rendered effective during movement of said clutch wheel to Said first working position by said electromagnetic means to apply said braking action to said clutch wheel. 5 A combination according to claim 3; wherein said last-mentioned means comprises at least one rotationally stationary magnetic member having a braking surface portion, means mounting said magnetic member for translational movement relative to said clutch wheel and output member, a friction lining connected to said clutch wheel in oppositely spaced-apart relationship from said braking surface portion of said magnetic member, and means spaced-apart from said magnetic member for selectively creating a magnetic flux coacting with said magnetic member to effect translational movement of said braking surface portion of said magnetic member into frictional engagement with said friction lining followed by translational movement of said clutch wheel into said first working position.