| 摘要 |
PROBLEM TO BE SOLVED: To provide a disc brake device provided with a servo mechanism and capable of reducing a servo ratio in accordance with the increase of anchor loads when braking. SOLUTION: A braking piston 14 is pushed and moved in accordance with operation force to press a pad 12 against a disc rotor 11 when braking, and friction force in the peripheral direction of a rotor of the pad 12 and the disc rotor 11 is taken out as anchor load by the servo mechanism 20, is converted into servo load toward the disc rotor 11, and is added to the pad 12. The servo mechanism 20 is a mechanical mechanism for reducing a servo ratio in accordance with increase of anchor load and is provided with a lever 21 engaging with a back metal unit 12a of the pad and a supporting pin 23 assembling the lever 21 on a caliper 15. The lever 21 is provided with a first arm part 21a engaging with an end face in the peripheral direction of the rotor of the back metal unit 12a, being elastically deformed in accordance with increase of anchor load, and moving a part engaging with the back metal unit 12a onto a supporting pin 23 side and a second arm part 21b engaging with a rear surface of the back metal unit 12a to add servo load on the back metal unit 12a. COPYRIGHT: (C)2007,JPO&INPIT
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