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    • 92. 发明授权
    • Lawn mower blade control apparatus
    • 割草机叶片控制装置
    • US4035994A
    • 1977-07-19
    • US581029
    • 1975-05-27
    • Stephen J. Hoff
    • Stephen J. Hoff
    • A01D34/68F16D67/02A01D75/20
    • A01D34/6812F16D67/02A01D2101/00Y10T477/747Y10T477/865
    • Mounting and control apparatus for a driven element such as a lawn mower blade mounted coaxially on an engine drive shaft, in an arrangement in which, under control of a deadman lever, the driven element is normally de-clutched from the shaft and stopped by a brake, as when the driving engine is idled, and for operation is released by the brake and clutched by a centrifugal clutch to the drive shaft, as when the engine is speeded up. The compact nested assembly includes a driven drum element having an outer cylindrical brake and clutch drum and an inner bearing ring which lies within the axial length of the drum and is mounted on the outer race of a ball bearing carried by a reduced-diameter bearing sleeve on a main hub fixed to the motor shaft. A clutch carrier plate on the hub carries centrifugal shoes engageable with the inside of the drum and partially nested between it and the bearing ring. The hub carries a flywheel when the engine is designed to depend on the mower blade for flywheel mass. A protective bowl about the assembly forms a mounting platform for an arcuate brake-mounting plate which supports an elongated brake band about the drum. One band end straddles and is anchored to the plate; the other straddles the plate and is connected between a brake-applying spring anchored on the plate and a brake-release link connected to an eccentric pin on a crank wheel rotatable on the mounting plate.
    • 用于被驱动元件的安装和控制装置,例如同轴地安装在发动机驱动轴上的割草机叶片,在这种布置中,在所述从动元件的控制下,所述从动元件通常与所述轴脱离并被一个 制动器,当驱动发动机空转时,并且通过制动器释放操作并通过离心式离合器与驱动轴卡住,如同发动机加速时那样。 紧凑型嵌套组件包括具有外圆柱形制动器和离合器鼓的从动鼓元件和位于滚筒的轴向长度内的内轴承环,并且安装在滚珠轴承的外圈上,滚珠轴承由直径小的轴承套 在固定在电机轴上的主轴上。 轮毂上的离合器承载板承载与滚筒内部接合并部分嵌套在其与轴承环之间的离心鞋。 当发动机被设计为依赖于飞轮质量的割草机叶片时,轮毂承载飞轮。 关于组件的保护碗形成用于弓形制动器安装板的安装平台,其支撑围绕滚筒的细长的制动带。 一个带端跨过并固定在板上; 另一个跨接在板上,并且连接在锚固在板上的制动施加弹簧和连接到可在安装板上旋转的曲柄轮上的偏心销的制动释放连杆。