ELECTRIC BRAKE

• US 3,734,245 A
• Filed: 10/01/1971
• Issued: 05/22/1973
• Est. Priority Date: 10/01/1971
• Status: Expired due to Term

• Current Assignee: Harold C. Hubbard
• Original Assignee: Harold C. Hubbard
• Inventors: Hubbard, Harold C.
• Primary Examiner(s): Duggan, D. F.
• Application Number:
  US05/185,664
• Time in Patent Office: 599 Days
• Field of Search: 310/77,93,103 188/163,162,161,164 192/84R,84A
• US Class Current: 188/163
• CPC Class Codes: B60T 1/06 acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
• CPC Class Codes: F16D 2065/024 the braking surface being inclined with respect to the rotor's axis of rotation at an angle other than 90 degrees, e.g. comprising a conical rotor
• CPC Class Codes: F16D 2121/20 using electromagnets
• CPC Class Codes: F16D 55/00 Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes similar clutches F16D13/38

Abstract

A vehicle electric brake with stationary and axially moveable cores providing a V-shape annular recess receiving an endless belt providing a friction liner releasably urged into firm frictional engagement with the cores by an electromagnet mounted in the stationary core. The moveable core is mounted on a wheel hub for rotation therewith and axial movement with respect to the fixed core to engage the belt between the cores and thereby restrain rotation of a wheel on the hub to stop the vehicle.

Claims

1. A braking device adapted for use in a vehicle having an axle and a wheel hub on the axle comprising first and second cores each having a friction surface in generally opposed, spaced relation forming an annular recess having a generally V-shape cross section, an endless belt with a generally V-shape cross section providing a ring of friction material received in said annular recess between said opposed surfaces, an electromagnet received in one of said cores and adapted to move said cores toward each other and said opposed friction surfaces into firm frictional engagement with said endless belt when energizEd, one of said cores being adapted for mounting such that it does not rotate with respect to the vehicle, the other of said cores being adapted for connection with the wheel hub for rotation therewith, and one of said cores also being mounted for generally axial movement toward and away from the other of said cores.

2. The braking device of claim 1 in which said cores are generally cylindrical and one of said cores encircles the axle and the other of said cores is concentric with and mounted on a flange of the wheel hub.

3. The braking device of claim 1 in which said electromagnet comprises a coil of electrically conductive wire encircling the axle and mounted in an annular groove in said one core and in which said other core has an annular rim extending generally axially into said groove adjacent to said coil of wire.

4. The braking device of claim 2 in which said electromagnet comprises a coil of electrically conductive wire encircling the axle and mounted in an annular groove in said one core and in which said other core has an annular rim extending generally axially into said groove adjacent to said coil of wire.

5. The braking device of claim 1 in which one of said cores has means retaining said endless belt on said core when at least one of said opposed friction surfaces is disengaged from said endless belt.

6. The braking device of claim 2 in which one of said cores has means retaining said endless belt on said core when at least one of said opposed friction surfaces is disengaged from said endless belt.

7. The braking device of claim 3 in which one of said cores has means retaining said endless belt on said core when at least one of said opposed friction surfaces is disengaged from said endless belt.

8. The braking device of claim 7 in which said retaining means of said one core comprises a generally radially extending circumferential flange spaced from said friction surface of said one core and adapted to retain said endless belt on said one core when at lease one of said friction surfaces is disengaged from said endless belt.

9. A braking device for a vehicle comprising a wheel hub, first and second cores each having a friction surface thereon with the surfaces in opposed spaced relation forming an annular recess with a generally V-shape cross section, an endless belt with a generally V-shape cross section providing a ring of friction material received in said annular recess between said opposed surfaces, one of said cores being concentric with and carried by said wheel hub for rotation therewith and generally axial movement in relation thereto toward and away from the other of said cores, the other of said cores being generally co-axial with said hub and adapted for mounting in a stationary position with respect to the vehicle, and an electromagnet received in said one core and adapted when energized to move said cores toward each other and said friction surfaces into firm engagement with said endless belt.

10. The braking device of claim 9 in which said one core is adapted to journal for free rotation an axle adapted for connection to said hub.

11. The braking device of claim 10 further including an axle connected to said hub and journaled for free rotation in said one core.