| 摘要 |
<p>PURPOSE:To obtain simple construction by enabling clearance adjustment by using a spring made by only a spring and mounted between a strut and an eccentric cam. CONSTITUTION:A long hole 8c of an eccentric cam member 11 is fit to a circular supporting pin 11a fixed to a strut 8 and mounted so that the eccentric cam member 11 can rotate and can move at a predetermined amount in the axial direction of the strut 8. The eccentric cam member 11 has a circular tooth unit 11b which makes an axial support point O1 of the cam member as a center, and the tooth unit 11b is engaged with a tooth unit 12a of a gear member 12 fixed to the strut 8. Respective tooth units 11b, 12a are formed in teeth shape and enable one-direction rotation of the eccentric cam member 11. The eccentric cam member 11 forms a cam face 11c which changes radius vector whose axial support point O1 is the center gradually, and contacts the cam face 11c to an end edge corner of a web of a brake shoe 3 and engaged by a force of a spring 13 mounted between with the strut 8.</p> |
