# US 2014/0197717 A1 · Drive unit for a revolving door with an integrated blocking device and/or braking device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197717 A1 - Document ID: US20140197717A1 - Status: Published application - Kind: A1 - Application number: 14/153,829 - Filed: 2014-01-13 - Published: 2014-07-17 - Earliest claimed: 2013-01-14 - Inventors: Sven BUSCH - Web page: https://patentgrep.com/patent/US20140197717A1 ## CPC - H02P 3/04: Means for stopping or slowing by a separate brake, e.g. friction brake or eddy-current brake - E05F 15/608: for revolving wings - H02K 1/14: Stator cores with salient poles - H02K 1/2791: Surface mounted magnets; Inset magnets - H02K 11/30: Structural association with control circuits or drive circuits - E05Y 2900/132: Doors - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - E05F: DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF ## Abstract A drive unit for a revolving door having a turnstile includes: an electronically commutated multipole motor having: (i) a disk-shaped or cup-shaped stator part configured to be arrangable at a stationary structural component part of the revolving door, (ii) a disk-shaped or cup-shaped rotor part configured to be gearlessly connectable to the turnstile of the revolving door, and (iii) an engagement device arranged between the stator part and the rotor part, the engagement device being configured to intervene in rotational movement of the rotor part. The stator part and the rotor part are in a plane-parallel arrangement with respect to one another. ## Claims ### Claim 1 A drive unit for a revolving door (100) having a turnstile (13), the drive unit comprising: an electronically commutated multipole motor (1) having: (i) a disk-shaped or cup-shaped stator part (10) configured to be arrangable at a stationary structural component part (11) of the revolving door (100), (ii) a disk-shaped or cup-shaped rotor part (12) configured to be gearlessly connectable to the turnstile (13) of the revolving door (100), and (iii) an engagement device (14) arranged between the stator part (10) and the rotor part (12), the engagement device (14) being configured to intervene in rotational movement of the rotor part (12), wherein the stator part (10) and the rotor part (12) are in a plane-parallel arrangement with respect to one another. ### Claim 2 (depends on 1) The drive unit according to claim 1, wherein the engagement device (14) comprises a blocking device (27) configured to block the rotational movement of the rotor part (12), the blocking device (27) being arranged in a stationary manner at the stator part (10) and configured to be engagable with at least a part of the rotor part (12) by positive engagement. ### Claim 3 (depends on 2) The drive unit according to claim 2, wherein: the rotor part (12) comprises a receiving opening (16), and the blocking device (27) comprises an actuator and a blocking element (15) movable, by the actuator, in a positively engaging manner into the receiving opening (16) in the rotor part (12). ### Claim 4 (depends on 3) The drive unit according to claim 3, wherein the actuator of the blocking device (27) comprises a magnet coil (17) configured to act on a magnet armature (18) connected to the blocking element (15), when the magnet coil (17) is electrically activated, so as to cause the blocking element (15) to carry out a lifting movement. ### Claim 5 (depends on 4) The drive unit according to claim 4, wherein the rotor part (12) has an engagement disk (19), the engagement disk (19) having the receiving opening (16) in which the blocking element (15) engages during the lifting movement. ### Claim 6 (depends on 1) The drive unit according to claim 1, further comprising a control unit (20) arranged between the stator part (10) and the rotor part (12) of the multipole motor (1), the control unit (20) being configured to activate the engagement device (14). ### Claim 7 (depends on 6) The drive unit according to claim 6, further comprises: (a) a plurality of coil elements (21) arranged between the stator part (10) and the rotor part (12), the coil elements (21) being coupled to the stator part (10), and (b) a quantity of magnet elements (22) arranged between the stator part (10) and the rotor part (12), the magnet elements (22) being coupled to the rotor part (12). ### Claim 8 (depends on 7) The drive unit according to claim 7, wherein the coil elements (21) are arranged on a circular path at the stator part (10) so as to form a coil ring, wherein the engagement device (14) and the control unit (20) are arranged in an area inside the coil ring. ### Claim 9 (depends on 1) The drive unit according to claim 1, wherein the engagement device (14) comprises a braking device (23) configured to brake the rotational movement of the rotor part (12). ### Claim 10 (depends on 9) The drive unit according to claim 9, wherein the braking device (23) is arranged in a stationary manner at the stator part (10) and is configured to engage the rotating rotor part (12) in a frictionally engaging manner. ### Claim 11 (depends on 9) The drive unit according to claim 9, wherein the braking device (23) has an actuator (24) and a braking element (25), wherein the braking element (25) can be brought into frictional engagement against a disk-shaped portion (26) of the rotor part (12) by activating the actuator (24). ### Claim 12 (depends on 1) A revolving door having a drive unit according to claim 1. ### Claim 13 (depends on 5) The drive unit according to claim 5, wherein the engagement disk (19) has a plurality of receiving openings (16) into which the blocking element (15) may engage during the lifting movement. ### Claim 14 (depends on 11) The drive unit according to claim 11, wherein the disk-shaped portion (26) is annular in shape.