| 摘要 |
A rolling door operator comprises a rotary shaft, a centrifugal brake mechanism, and a unidirectional centrifugal mechanism, in which a latching tooth and plurality of slots are disposed around one end of the rotary shaft, and the unidirectional centrifugal mechanism includes an active pin with an axial latching face and a sliding face, the axial latching face being engaged with one of slots to latch the rotary shaft together only in the falling direction of a door curtain, and the sliding face having a bevel adjacent to the latching face to contact slidingly over the slots, so that the door curtain can be lifted up immediately in another direction, and without affecting normal opening function of the door curtain. |
| 主权项 |
1. A door operator, comprising a rotary shaft, a centrifugal brake mechanism, and a unidirectional mechanism, wherein:
the rotary shaft is provided in a housing, a plurality of slots equally spaced from each other are disposed circumferentially on a first end of the rotary shaft, and a second end of the rotary shaft is coupled to an output shaft; the centrifugal brake mechanism includes an end disc, a pair of stationary pins, and a pair of brake pads, the end disc is rotatably mounted on the first end of the rotary shaft, the end disc has a first end face and a second end face opposite to the first end face, a shaft hub extends from the first end face of the end disc and has a radial mounting hole extending radially toward the plurality of slots; the pair of stationary pins extend from the second end face of the end disc; the pair of brake pads are pivoted on the end disc by the pair of stationary pins, respectively, so that each of the pair of brake pads is capable of being swung and abutted on an inner wall of the housing when the centrifugal brake mechanism is rotated together with the rotary shaft; the unidirectional mechanism includes a base, an active pin and an elastic element, the base is disposed on the shaft hub and located outside the mounting hole, the base includes a limiting slot; one end of the active pin is provided with a unidirectional latching tooth, the active pin is slidably disposed in the mounting hole in such a manner that the other end of the active pin extends through the base and protrudes from the base; the other end of the active pin is provided with a draw bar; the elastic element is accommodated in the mounting hole and configured to surround the active pin; the elastic element is compressed and located between the unidirectional latching tooth and the base so that the active pin is biased by the elastic element and that the latching tooth is biased toward the plurality of slots when the draw bar is received in the limiting slot. |
