| 摘要 |
<p>The webs (38) of brake shoes (14) have adequate apertures in the ends adjacent to the actuator cam (18), to engage with a roller assembly (20). The apertures have radial sections and lateral flats to engage with radial sections (48) and lateral flats (46) on the ends of roller pin (22). The assembly of roller (20) consists of pin (22), and roller body (24) rotatably mounted on pin (22). A return spring (28) is mounted between the two brake shoes (14). The spring (28) has in one end a semi-circular hook (32) and in the other end a semi-circular hook having an extension (34), to enable its removal or mounting by hand.</p> |
