| 摘要 |
<p>PROBLEM TO BE SOLVED: To miniaturize a motor and a caliper main body while lowering the motor torque by assembling a reduction gear capable of providing a large speed reduction ratio without requiring a large space. SOLUTION: A stator 16 and a rotor 17 of an electric motor 15 are arranged inside the caliper main body 2, and the rotation of the rotor 17 is transmitted to a piston 10 while converting the rotation to the linear motion through a ball lamp mechanism 21, and brake pads 9 and 8 are pressed to a disk rotor D by the piston 10 and a claw body 4. In a disk brake with the described structure, the rotor 17 is provided with two external gears 31 and 32, and two disks 23 and 25 of the ball lamp mechanism 21 are provided with two internal gears 36 and 37, and these external gears 31 and 32 and the internal gears 36 and 37 are engaged with each other so as to rotate the two disks 23 and 25 of the ball lamp mechanism 21 at a constant ratio of rotation in relation to the rotor 17. One rotating disk 25 is moved by the differential movement, and the piston 10 is moved forward with that movement.</p> |
