Electric brake caliper

An electric brake caliper, comprising:

• a caliper main body;
• a pair of brake pads held by the caliper main body such that the brake pads face each other with a disc rotor interposed therebetween, the disc rotor being configured to rotate with a wheel;
• and
• an actuator held by the caliper main body and comprising (A) a piston, (B) an electric motor of a rotary type as a drive source, and (C) a motion converting mechanism to move the piston by rotation of the electric motor, the actuator being configured to move one of the brake pads toward the other of the brake pads,
• wherein the motion converting mechanism comprises (a) an output sleeve having a hollow cylindrical shape and configured to be linearly moved to move the piston in an axial direction in which an axis of the motion converting mechanism extends, the piston being disposed at one of opposite ends of the output sleeve that is nearer to the one of the brake pads, and (b) an input shaft disposed in the output sleeve along the axis and configured to be rotated by the electric motor, the motion converting mechanism being configured to convert rotation of the input shaft into a linear movement of the output sleeve,
• wherein the electric motor comprises a driving rotary shaft having a hollow cylindrical shape,
• wherein the motion converting mechanism is disposed in an inner space of the driving rotary shaft, and the input shaft comprises a flange whose outer circumferential end is in mesh with an inner circumferential portion of the driving rotary shaft,
• wherein the electric brake caliper further comprises an inclination allowing mechanism configured to allow inclination of the motion converting mechanism so as to allow inclination of the axis,
• wherein the inclination allowing mechanism comprises:
• a seat member which is fixed to the caliper main body and which comprises a seat surface recessed so as to define a part of a spherical surface;
• and a slide member which supports the input shaft and which slides on the seat surface, and
• wherein a center of the spherical surface coincides with a center of the inclination of the motion converting mechanism.

An electric brake caliper, comprising:

• a caliper main body;
• a pair of brake pads held by the caliper main body such that the brake pads face each other with a disc rotor interposed therebetween, the disc rotor being configured to rotate with a wheel;
• and
• an actuator held by the caliper main body and comprising (A) a piston, (B) an electric motor of a rotary type as a drive source, and (C) a motion converting mechanism to move the piston by rotation of the electric motor, the actuator being configured to move one of the brake pads toward the other of the brake pads,
• wherein the motion converting mechanism comprises (a) an output sleeve having a hollow cylindrical shape and configured to be linearly moved to move the piston in an axial direction in which an axis of the motion converting mechanism extends, the piston being disposed at one of opposite ends of the output sleeve that is nearer to the one of the brake pads, and (b) an input shaft disposed in the output sleeve along the axis and configured to be rotated by the electric motor, the motion converting mechanism being configured to convert rotation of the input shaft into a linear movement of the output sleeve,
• wherein the electric motor comprises a driving rotary shaft having a hollow cylindrical shape,
• wherein the motion converting mechanism is disposed in an inner space of the driving rotary shaft, and the input shaft comprises a flange whose outer circumferential end is in mesh with an inner circumferential portion of the driving rotary shaft,
• wherein the motion converting mechanism comprises a plurality of planetary rollers disposed between an outer circumference of the input shaft and an inner circumference of the output sleeve such that the planetary rollers extend in the axial direction and are revolvable about the input shaft,
• wherein threads are formed on the outer circumference of the input shaft, the inner circumference of the output sleeve, and an outer circumference of each of the planetary rollers, and
• wherein the thread of the input shaft and the thread of each of the planetary rollers are engaged with each other, and the thread of the output sleeve and the thread of each of the planetary rollers are engaged with each other.