Gear-driven electric mechanical brake assembly and motor subassembly therefor

An electric mechanical brake assembly comprising:

• a) an electric-mechanical-brake-caliper housing;
• b) an electric-mechanical-brake ballscrew subassembly at least partially disposed within the housing, having a rotatable actuation shaft, and having a linearly-movable member which is driven by the actuation shaft and which is attachable to a brake pad;
• c) a first electric motor having a first drive shaft;
• d) a second electric motor having a second drive shaft;
• and
• e) at least three gears operatively connecting the first and second drive shafts to the actuation shaft,
• wherein the first and second drive shafts are substantially parallel to the actuation shaft,
• wherein the first and second electric motors are shorter in axial length than the ballscrew subassembly, and
• wherein the first and second electric motors are at least partially disposed within the housing and are completely disposed alongside the ballscrew subassembly.

An electric-mechanical-brake motor subassembly comprising:

• a) an electric-mechanical-brake first electric motor having a first drive shaft;
• b) an electric-mechanical-brake second electric motor having a second drive shaft;
• c) a motor plate, wherein the first and second electric motors are attached to the motor plate, and wherein the motor plate is attachable to an electric-mechanical-brake-caliper housing;
• and
• d) at least three gears operatively connectable to the first and second drive shafts and to a rotatable actuation shaft, of an electric-mechanical-brake ballscrew subassembly at least partially disposed within the housing, for the first and second drive shafts to rotate the actuation shaft.

An electric-mechanical-brake motor subassembly comprising:

• a) an electric-mechanical-brake first electric motor having a first drive shaft;
• b) an electric-mechanical-brake second electric motor having a second drive shaft;
• c) a motor plate, wherein the first and second electric motors are attached to the motor plate, and wherein the motor plate is attachable to an electric-mechanical-brake-caliper housing;
• and
• d) at least three gears operatively connectable to the first and second drive shafts and to a rotatable actuation shaft, of an electric-mechanical-brake ballscrew subassembly at least partially disposed within the housing, for the first and second drive shafts to rotate the actuation shaft,
• wherein, when the motor plate is attached to the housing, the first and second drive shafts are substantially parallel to the actuation shaft,
• wherein the first and second electric motors are shorter in axial length than the ballscrew subassembly, and
• wherein, when the motor plate is attached to the housing, the first and second electric motors are at least partially disposed within the housing and are completely disposed alongside the ballscrew subassembly.