Self-adjusting electromagnetic clutch-brake

Claim 2

In combination with an electromagnetic clutch-brake of the type having a friction disc assembly, which assembly includes two sets of coacting friction discs adapted for releasably coupling a driving and a driven rotary component, and wherein pressure is exerted on said disc assembly by an armature''s response to a magnetic force created by electromagnetic actuating means, the improvement comprising: self-adjusting wear compensating clutch means, said compensating means including a clutch adjusting ring advanceably and concentrically threaded to said armature for relative rotation therewith, said ring being slidably adapted for axial movement along said driven rotary component for contactive engagement with said friction disc assembly, and said ring being secured to said driven rotary component for rotation therewith so that upon energization of said actuating means, said armature is drawn into contactive engagement with said driving rotary component which in turn causes said clutch adjusting ring to coact with said driven rotary component and its threaded connection with said armature, thereby axially advancing said adjusting ring into contactive engagement with said friction disc assembly; and self-adjusting wear compensating brake means for braking said driven rotary means when said electromagnetic actuating means is de-energized, said brake means including a brake member secured to said self-adjusting clutch means for rotation therewith and a brake adjusting ring operatively coupled to said brake member so that when said electromagnetic actuating means is de-energized said brake member and said brake adjusting ring co-act to compensate for wear of the brake member.

Claim 3

The combination as claimed in claim 1 including further first detent means for continuously retarding said armature from rotatably reversing its direction of rotation relative to said clutch adjusting ring.

Claim 4

The combination as claimed in claim 1 wherein the electromagnetic actuating means comprises a magnetic body disposed about said driving means and an electromagnetic winding disposed within said magnet body.

Claim 5

The combination as claimed in claim 1 wherein the self-adjusting brake means includes clutch disengagement means adapted to exert an axial load on said clutch adjusting ring opposite in direction to the electromagnetic engaging force.

Claim 6

The combination as claimed in claim 4 wherein said self-adjusting brake means is operative to apply a braking action to said driven rotary component under the influence of said clutch disengagement means; and a rotatively fixed frame member for reacting against said brake member when said brake member is biased into contact with said frame member upon de-energization of said clutch actuating means.

Claim 7

In combination with an electromagnetic clutch-brake of the type having a friction disc assembly, which assembly includes two sets of coacting friction discs adapted for releasably coupling a driving and a driven rotary component, and wherein pressure is exerted on said disc assembly by an armature''s response to a magnetic force created by electromagnetic actuating means, the improvement comprising: self-adjusting wear compensating clutch means, said compensating means including a clutch adjusting ring advanceably and concentrically threaded to said armature for relative rotation therewith, said ring being slidably adapted for axial movement along said driven rotary component for contactive engagement with said friction disc assembly, and said ring being secured to said driven rotary component for rotation therewith so that upon energization of said actuating means, said armature is drawn into contactive engagement with said driving rotary component which in turn causes said clutch adjusting ring to coact with said driven rotary component and its threaded connection with said armature, thereby axially advancing said adjusting ring into contactive engagement with said friction disc assembly; self-adjusting wear compensating brake means for braking said driven rotary means when said electromagnetic actuating means is de-energized, said self-adjusting brake means being operatively coupled to said self-adjusting clutch means; said self-adjusting brake means including clutch disengagement means adapted to exert an axial load on said clutch adjusting ring opposite in direction to the electromagnetic engaging force; said self-adjusting brake means including an annular friction brake member rotatably mounted to said clutch adjusting ring and operative to apply a braking action to said driven rotary component under the influence of said resilient disengagement means, said annular friction brake member being fabricated from an organic friction material; and a rotatably fixed frame member for reacting against said brake member when said brake member is biased into contact with said frame membeR upon de-energization of said clutch actuating means.

Claim 8

In combination with an electromagnetic clutch-brake of the type having a friction disc assembly, which assembly includes two sets of coacting friction discs adapted for releasably coupling a driving and a driven rotary component, and wherein pressure is exerted on said disc assembly by an armature''s response to a magnetic force created by electromagnetic actuating means, the improvement comprising: self-adjusting wear compensating clutch means, said compensating means including a clutch adjusting ring advanceably and concentrically threaded to said armature for relative rotation therewith, said ring being slidably adapted for axial movement along said driven rotary component for contactive engagement with said friction disc assembly, and said ring being secured to said driven rotary component for rotation therewith so that upon energization of said actuating means, said armature is drawn into contactive engagement with said driving rotary component which in turn causes said clutch adjusting ring to coact with said driven rotary component and its threaded connection with said armature, thereby axially advancing said adjusting ring into contactive engagement with said friction disc assembly; self-adjusting wear compensating brake means for braking said driven rotary means when said electromagnetic actuating means is de-energized, said self-adjusting brake means being operatively coupled to said self-adjusting clutch means; said self-adjusting brake means including clutch disengagement means adapted to exert an axial load on said clutch adjusting ring opposite in direction to the electromagnetic engaging force; said self-adjusting brake means including an annular friction brake member rotatably mounted to said clutch adjusting ring and operative to apply a braking action to said driven rotary component under the influence of said resilient disengagement means, said annular friction brake member being fabricated from an organic friction material; and a rotatably fixed frame member for reacting against said brake member when said brake member is biased into contact with said frame membeR upon de-energization of said clutch actuating means.

Claim 9

The combination as claimed in claim 6 wherein said annular friction brake member has a frusto-conical braking surface for reacting against a mating frusto-conical surface of said fixed frame member.

Claim 10

In combination with an electromagnetic clutch-brake of the type having a friction disc assembly, which assembly includes two sets of coacting friction discs adapted for releasably coupling a driving and a driven rotary component, and wherein pressure is exerted on said disc assembly by an armature''s response to a magnetic force created by electromagnetic actuating means, the improvement comprising: self-adjusting wear compensating clutch means, said compensating means including a clutch adjusting ring advanceably and concentrically threaded to said armature for relative rotation therewith, said ring being slidably adapted for axial movement along said driven rotary component for contactive engagement with said friction disc assembly, and said ring being secured to said driven rotary component for rotation therewith so that upon energication of said actuating means, said armature is drawn into contactive engagement with said driving rotary component which in turn causes said clutch adjusting ring to coact with said driven rotary component and its threaded connection with said armature, thereby axially advancing said adjusting ring into contactive engagement with said friction disc assembly; and self-adjusting wear compensating brake means including an annular friction braking member rotatably mounted to said clutch adjusting ring and adapted to slide axially there along, said braking member having helical threads in one of its radial surfaces, a brake adjusting ring concentrically and threadably received within said mating helical threads of said annular braking member, a resilient braking member operative to exert a braking force on said clutch adjusting ring, and a rotatably fixed frame member for reacting against said brake member when said brake member is biased into contact with said frame member by said resilient brake means when said actuating means is de-energized.

Claim 11

In combination with an electromagnetic clutch-brake of the type having a friction disc assembly, which assembly includes two sets of coacting friction discs adapted for releasably coupling a driving and a driven rotary component, and wherein pressure is exerted on said disc assembly by an armature''s response to a magnetic force created by electromagnetic actuating means, the improvement comprising: self-adjusting wear compensating clutch means, said compensating means including a clutch adjusting ring advanceably and concentrically threaded to said armature for relative rotation therewith, said ring being slidably adapted for axial movement along said driven rotary component for contactive engagement with said friction disc assembly, and said ring being secured to said driven rotary component for rotation therewith so that upon energication of said actuating means, said armature is drawn into contactive engagement with said driving rotary component which in turn causes said clutch adjusting ring to coact with said driven rotary component and its threaded connection with said armature, thereby axially advancing said adjusting ring into contactive engagement with said friction disc assembly; and self-adjusting wear compensating brake means including an annular friction braking member rotatably mounted to said clutch adjusting ring and adapted to slide axially there along, said braking member having helical threads in one of its radial surfaces, a brake adjusting ring concentrically and threadably received within said mating helical threads of said annular braking member, a resilient braking member operative to exert a braking force on said clutch adjusting ring, and a rotatably fixed frame member for reacting against said brake member when said brake member is biased into contact with said frame member by said resilient brake means when said actuating means is de-energized.

Claim 12

The combination as claimed in claim 8 including further detent means for retarding said brake adjusting ring from rotatably reversing its direction of rotation relative to said friction braking member.

Claim 13

The combination as claimed in claim 8 wherein said annular friction braking member is fabricated from an organic friction material.

Claim 14

The combination as claimed in claim 1 including second detent means for continuously retarding said brake adjusting ring from rotatably reversing its direction of rotation relative to said braking member.