| 摘要 |
<p>The brake comprises identical arms (17) rotating freely on trunnions carrying in its top part a hollow Vee cam (23) drilled in its middle with a horizontal bisecting edge which receives a pin (9) carrying a cam finger (21) which acts against the cam to close the brake. The pin is fixed at the end (3) of the movable arc (1), which controls the action of the brake in a rotational movement, from holes (4,5) located in the top and central part of the arc. Compression springs (26) placed around the pins hold and return the arms into position. The arc deforms in the event of too much pressure by the pads (27) against the rim.</p> |
