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    • 2. 发明授权
    • Variable gear ratio ratchet
    • 可变齿轮比棘轮
    • US08122788B2
    • 2012-02-28
    • US12689065
    • 2010-01-18
    • Michael T. GauthierMara C. SchwartzRobert F. Miller
    • Michael T. GauthierMara C. SchwartzRobert F. Miller
    • B25B17/00
    • B25B17/00B25B15/04
    • This invention relates to a fastener driving device including a variable ratio gear mechanism that enables the ratio of the rotation of the handle to the rotation of a driving bit extending from the handle to be varied to allow the bit to rotate at different speeds from the handle. The device includes a gear mechanism disposed within a housing for the device that includes a locking member and a biasing member. The biasing member urges the locking member into engagement with the gear mechanism to lock the gear mechanism in a configuration for a 1:1 gear ratio. A selector switch is secured to the device over the gear mechanism and is operable to move the locking member into and out of engagement with the planetary gears against the bias of the biasing member to provide an increased gear ratio for the gear mechanism when desired.
    • 本发明涉及一种紧固件驱动装置,其包括可变比齿轮机构,其能够使手柄的旋转与从手柄延伸的驱动钻头的旋转的比率变化,以允许钻头以与手柄不同的速度旋转 。 该装置包括设置在用于装置的壳体内的齿轮机构,其包括锁定构件和偏压构件。 偏置构件促使锁定构件与齿轮机构接合,以将齿轮机构锁定在1:1的齿轮比的构造中。 选择器开关通过齿轮机构固定到设备上,并且可操作以抵抗偏压构件的偏压而将锁定构件移动到与行星齿轮啮合并脱离与行星齿轮接合,从而当需要时为齿轮机构提供增加的齿轮比。