F - Mech Eng,Light,Heat,Weapons – 16 – D
Patent
F - Mech Eng,Light,Heat,Weapons
16
D
188/145, 192/18
F16D 65/16 (2006.01) B60T 13/74 (2006.01) F16D 13/74 (2006.01) F16D 55/224 (2006.01) F16D 63/00 (2006.01) F16D 65/14 (2006.01) F16H 25/20 (2006.01) H02K 7/06 (2006.01) F16D 65/21 (2006.01)
Patent
CA 1319329
ELECTRICALLY OPERATED DISC BRAKES ABSTRACT OF THE DISCLOSURE The electrically operated disc brakes (10, 210) may include a high efficiency screw and nut mechanism (60) and/or a one-way clutch mechanism (230). The high efficiency screw and nut mechanism (60) includes a screw (86) with a screw thread (89) that has a predetermined pitch, and at least one nut (77, 97) disposed about the screw (86) and having an interior opening (78, 98) with a nut thread (79, 99) therein. The pitch of the nut thread (79, 99) is equal to the pitch of the screw thread (89), and the pitch diameter of the nut thread (79, 99) is greater than the pitch diameter of the screw thread (89). The screw (86) is driven by the electric motor (40) of the disc brake (10, 210) . The one-way clutch mechanism (230) includes a sun gear drive member (252) which has oppo- sitely disposed radial drive slots (257) through which ex- tends a drive pin (243) that extends transversely through the drive shaft (241) of the electric motor (240). The sun gear drive member (252) is journalled within a cage member (281) which has oppositely disposed radial cage slots (282) into which extends the drive pin (243). The radial cage slots (282) are in circumferential non-alignment with the radial drive slots (257) of the sun gear drive member (252). The sun gear drive member (252) includes cam sur- faces (253) receiving roller bearings (290) thereat, the roller bearings (290) extending through oppositely dis- posed openings (284) within the cage member (281) to engage an interior surface (297) of an annular housing (295). The clutch mechanism (230) permits the sun gear drive member (252) to be rotated in both directions by the drive shaft (241), but when reaction forces attempt to re- verse rotation of the drive member (252) and electric motor (240), the clutch mechanism (230) locks and prevents such reverse rotation.
592514
Allied-Signal Inc.
Macrae & Co.
LandOfFree
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