| 摘要 |
<p>The brake unit comprises two brake shoes to be pushed towards a brake drum and two spreading elements (16,17) moved by a drive shaft (35). The inner ends of the spreading elements act in combination with a rotating mutual cam (20) provided with a slot (23) for the insertion of the flat lower end (26) of the drive shaft (35). A second flat segment (30) is located at a distance from the first (26) engaging with a second slot (38) in the drive shaft (35). The flat segments (26,30) can be moved longitudinally inside the slots (23,38).</p> |
