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    • 3. 发明授权
    • Hammer drill
    • 锤钻
    • US3955628A
    • 1976-05-11
    • US462187
    • 1974-04-18
    • Dieter GrozingerHeribert SchrammSteffen WunschErich Vogel
    • Dieter GrozingerHeribert SchrammSteffen WunschErich Vogel
    • B25D15/02B25D16/00B25D11/10E21C1/02
    • B25D16/006B25D16/003B25D2216/0015B25D2216/0023B25D2216/0038B25D2216/0046
    • A driven output shaft is mounted in a housing and has freedom of limited axial displacement between a first and a second position. A biasing spring permanently biases the output shaft to the first position. An impact member surrounds the output shaft and has a plurality of angularly spaced first axial projections which interdigitate with angularly spaced second axial projections provided on a disk member axially fixed on and turnably surrounding the output shaft. A retaining arrangement is provided in the housing and is engageable with the disk member to prevent rotation of the same when an axial force is exerted upon the output shaft counter to the action of the biasing spring, causing axial displacement of the output shaft to the second position thereof, and engagement of the disk member with the retaining arrangement.
    • 驱动输出轴安装在壳体中,并且在第一和第二位置之间具有有限的轴向位移的自由度。 偏置弹簧将输出轴永久地偏压到第一位置。 冲击构件围绕输出轴并且具有多个角度间隔开的第一轴向突起,该第一轴向突起与设置在轴向固定在可转动地围绕输出轴的盘构件上的有角度间隔开的第二轴向突起相交错。 保持装置设置在壳体中,并且当与偏压弹簧的作用相反的轴向力作用在输出轴上时可与盘构件接合以防止其旋转,导致输出轴向第二 位置,以及盘构件与保持装置的接合。