Clutch and brake arrangements for a motor

• US 4,222,471 A
• Filed: 05/11/1978
• Issued: 09/16/1980
• Est. Priority Date: 05/11/1978
• Status: Expired due to Term

• Current Assignee: Yung-San Hsu
• Original Assignee: Yung-San Hsu
• Inventors: Hsu, Yung-San
• Primary Examiner(s): Krizmanich, George H.
• Application Number:
  US05/904,815
• Time in Patent Office: 859 Days
• Field of Search: 192/18 B, 192/12 D, 192/84 AB
• US Class Current: 192/18.00B
• CPC Class Codes: F16D 67/06 electromagnetically actuated
• CPC Class Codes: H02K 7/1125 Magnetically influenced friction clutches and brakes

Abstract

This invention relates to a clutch and brake device, more particularly to such a device that the coupling winding fixed onto the supporting means extends within the rim groove of the flywheel-and-clutch member, having a clearance in between the coupling winding and the flywheel-and-clutch member, and two sets of brake winding are installed in the brake member; having the features that by selecting either the coupling winding or the brake winding to be energized either the clutch disc or the brake disc is moved toward the coupling or the braking position to make friction engagement with the clutch member or the brake member to drive or to brake.

Claims

1. A clutch and brake device for controlling motion of a transmission shaft, comprising:

a motor shaft;

a transmission shaft;

a supporting means connected to said motor shaft;

a flywheel-and-clutch member, having the provision of a rim groove;

an iron core having the provision of a circular depression defined thereon, being fixed onto said supporting means and extending within said rim groove of said flywheel-and-clutch member with a clearance defined between said rim groove and said flywheel-and-clutch member;

a pair of coupling windings each of which is wired within said circular depression of said iron core, said windings being wound in directions opposite to each other so that current passing through one of the windings is opposite to current passing through the other one of said pair of windings, said pair of windings being positioned in end-to-end alignment with each other, both windings being spaced from each other and in spaced parallelism with the transmission shaft so that magnetic flux generated on said transmission shaft by one of said windings is offset by magnetic flux generated on said transmission shaft by the other one of said pair of windings to minimize net inductance on said transmission shaft;

magnetic means located between said pair of coupling windings so that magnetic fluxes generated by said coupling windings are added together in said magnetic means between said coupling windings;

a non-magnetic material fixed at the bottom of said rim groove of said flywheel-and-clutch member;

a brake member, having the provision of a plurality of ring shaped grooves;

a plurality of brake windings each of which is wired respectively in one of said ring shaped grooves in opposite directions to each other to minimize the overall inductance and the overall reactive electromotive force, said brake windings being in spaced parallelism with each other and with the transmission shaft;

a clutch disc connected to said transmission shaft and located adjacent said set of coupling windings; and

a brake disc connected to said transmission shaft and located adjacent said brake windings.