| 摘要 |
A rotational facility includes a barrel coupled to a driving device for being rotated and driven by the driving device, a wheel rotatably attached onto the barrel, and a braking device secured to the wheel for engaging with the barrel and for braking the wheel relative to the barrel. The braking device includes a housing secured to the wheel and one or more actuating members received in the housing for engaging with the barrel to brake the housing and the wheel relative to the barrel. The housing includes a brake member for engaging with and for actuating the actuating member to engage with the barrel. The housing includes a peripheral channel formed by inner and outer peripheral walls to receive the brake member.
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