US 12,429,100 B1Granted

Electric brake assembly for electric drives

AssigneeHydro-Gear Limited Partnership

InventorRyan S. Buescher

Life of this patent

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Abstract

An electric brake for an electric drive includes a brake coil housing joined to an electric motor end cap to form a brake compartment containing a first and second stator with a rotor assembly disposed between the two stators. The rotor assembly comprises isolators for vibration damping and alignment of brake pucks constrained by and rotating along with a rotor engaged to an output shaft of the electric motor. An adjustable plug, a spacer and a spring are disposed in the brake coil housing. The spring is compressed by the adjustable plug to apply a biasing force against the second stator to press the stator against the brake pucks of the rotor assembly, and an electric brake coil is positioned adjacent to the second stator to electromagnetically pull the second stator away from the pair of brake pucks when energized.

Claims21

Dependent claims

An electric drive assembly, comprising:

a housing forming an internal brake compartment;
an electric motor output shaft partially disposed in the brake compartment;
an electric brake assembly comprising:
a first stator and a second stator disposed in the brake compartment;
a brake rotor assembly disposed in the brake compartment between the first stator and the second stator and engaged to the electric motor output shaft, the brake rotor assembly comprising a rotor made of a non-magnetic material, a brake puck engaged to the rotor, and a brake puck isolator engaged to the rotor and contacting the brake puck;
an adjustable plug at least partially disposed in the brake compartment;
a spring disposed in the brake compartment and contacting the second stator and in operable engagement with the plug to provide a biasing force to the second stator;
an electric brake coil disposed in the brake compartment concentrically about the spring and adjacent the second stator;
wherein compression of the spring by adjustment of the plug increases the biasing force to the second stator;
and
wherein the electric brake coil is configured to move the second stator away from the rotor when the electric brake coil is energized, to remove the biasing force from the electric motor output shaft.

8 more elements

An electric brake assembly for use with an electric drive having a housing, the electric brake assembly comprising:

a first stator and a second stator each disposed within a brake compartment formed in the housing;
a brake rotor assembly disposed within the brake compartment between the first stator and the second stator and comprising:
a rotor body having a center portion and two opposing arms extending outwardly from the center portion to form a bow tie shape,
a pair of slots formed in the rotor body, each slot of the pair of slots being formed in one of the two opposing arms and having an isolator portion and a puck portion, wherein each respective isolator portion is located between the center portion and the respective puck portion;
a pair of brake pucks, each of the pair of brake pucks being disposed in a respective one of the puck portions;
and
a pair of brake puck isolators, each of the pair of brake puck isolators being disposed in a respective one of the isolator portions;
a spring disposed within the brake compartment and configured to apply a biasing force against the second stator to press the second stator against the pair of brake pucks;
and
an electric brake coil disposed within the housing and positioned adjacent to the second stator, the electric brake coil configured to overcome the biasing force and electromagnetically move the second stator away from the pair of brake pucks when the electric brake coil is energized.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/658,171Filed 6 Apr 2022 · us provisional application
Priority: 21 May 2021
Granted: 30 Sep 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

F16D 55/226
The braking members being brake pads: in which the common actuating member is moved axially , e.g. floating caliper disc brakes
F16D 65/0006
Parts or details: noise or vibration control
F16D 65/121
Discs; Drums for disc brakes: consisting of at least three circumferentially arranged segments
F16D 65/122
Discs; Drums for disc brakes: adapted for mounting of friction pads