Electro-mechanical brake

An electro-mechanical brake (EMB) comprising:

• a driving unit configured to generate rotational force by power selectively applied as a user operates a brake pedal;
• a differential gear unit connected to the driving unit and including a first shaft and a second shaft disposed to be aligned to form rotational shafts and rotate in the same direction by rotational force from the driving unit;
• a first pad disposed on one side of a brake disk;
• a second pad disposed on the other side of the disk;
• a first braking unit connected to the first shaft in one end thereof and connected to the first pad in the other end thereof and configured to enable the first pad to be brought into contact with one side of the disk according to a rotation of the first shaft to generate braking force;
• and
• a second braking unit connected to the second shaft in one end thereof and connected to the second pad in the other end thereof and configured to enable the second pad to be brought into contact with the other side of the disk according to a rotation of the second shaft to generate braking force,
• wherein the first braking unit moves in a first plane and the second braking unit moves in a second plane different from the first plane,
• wherein the first braking unit is disposed in a direction parallel to the first shaft and varied in length in a length direction of the first shaft according to a rotation of the first shaft,
• wherein the second braking unit is disposed in a direction parallel to the second shaft and varied in length in a length direction of the second shaft according to a rotation of the second shaft,
• wherein the first braking unit, with a length increasing, moves the first pad in the direction toward the disk, and the second braking unit, with a length decreasing, moves the second pad in the direction toward the disk.