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    • 1. 发明授权
    • Automatic ball balancer for rotating machine
    • 旋转机自动球平衡机
    • US6132354A
    • 2000-10-17
    • US965768
    • 1997-11-07
    • Shinki OhtsuMitsuyuki IshikawaMasanori Yoshioka
    • Shinki OhtsuMitsuyuki IshikawaMasanori Yoshioka
    • F16F15/32B04B5/02B04B9/14F16F15/36
    • F16F15/363B04B9/14Y10T74/2109
    • A ball balancer for minimizing a dynamic unbalance of a moving part of a rotating machine such as a centrifuge is provided. The ball balancer includes a rotary balancer casing having disposed therein balls. The rotary balancer casing is mounted on the moving part coaxially with an axis of rotation thereof and has formed therein an inner side wall which is so curved that the balls are lifted away from the bottom of the balancer casing along the inner side wall by the centrifugal force and biased toward the opposite side of an unbalanced mass of the moving part when the rotational speed of the moving part exceeds a resonant speed that is a rotational speed of the moving part when matched with a natural frequency of the moving part, thereby counterbalancing the unbalanced mass of the moving part. In an alternative form, the balls include a first group having a large diameter and a second group having a small diameter. The large-diameter balls and the small-diameter balls are arranged alternately. Each of the large-diameter balls is lifted on adjacent one of the small-diameter balls by the reaction force produced by a shift in center between one of the large-diameter balls and adjacent one of the small-diameter balls arranged on the bottom of the balancer casing and biased toward the opposite side of the unbalanced mass of the moving part when the rotational speed of the moving part exceeds the resonant speed.
    • 提供了一种用于最小化诸如离心机之类的旋转机器的运动部件的动态不平衡的球平衡器。 球平衡器包括设置在其中的旋转平衡器壳体。 旋转平衡器壳体与其旋转轴线同轴地安装在移动部件上,并且在其中形成有如此弯曲的内侧壁,使得球通过离心机沿着内侧壁从平衡器壳体的底部提升离开 当运动部件的旋转速度超过作为运动部件的旋转速度的共振速度,当与运动部件的固有频率相匹配时,力并且偏置到运动部件的不平衡质量块的相对侧,从而平衡 移动部件的质量不平衡。 在替代形式中,球包括具有大直径的第一组和具有小直径的第二组。 大直径球和小直径球交替布置。 每个大直径的球通过在大直径球之间的中心的一个之间产生的反作用力和相邻的一个小直径球上相邻的一个小直径球提升, 平衡器壳体并且当运动部件的转速超过谐振速度时偏向移动部件的不平衡质量块的相对侧。
    • 5. 发明授权
    • Noise reduction mechanism for percussion tools
    • 打击乐器降噪机构
    • US5601149A
    • 1997-02-11
    • US378374
    • 1995-01-25
    • Yoshimitsu KawasakiMitsuyuki IshikawaTakao TanabeToshiaki Uchida
    • Yoshimitsu KawasakiMitsuyuki IshikawaTakao TanabeToshiaki Uchida
    • B23B45/16B25B21/02B25D17/11B25D17/24
    • B25D17/24B25B21/02B25B21/026B25D17/11
    • A percussion hammer tool comprises a spindle 1 causing rotation about an axis thereof. The spindle 1 is driven by a motor M. A hammer 3, slidably coupled with the spindle 1, generates a percussion force to rotate and hit an anvil. The anvil is divided into an engaging portion 7 engageable with the hammer 3 and a tip tool holding portion 8 holding a tip tool 16. The engaging portion 7 and the tip tool holding portion 8 are locked with each other. A torque transmitting mechanism 11 makes the engaging portion 7 and the tip tool holding portion 8 displaceable with each other telescopically in an axial direction. A cushion member 10 is provided in a clearance 9a between the engaging portion 7 and the tip tool holding portion 8, thereby transmitting an angular component of the percussion force while absorbing an axial component of the percussion force. An additional cushion member 13 may be interposed between the spindle 1 and the anvil.
    • 冲击锤工具包括绕其轴线旋转的主轴1。 主轴1由马达M驱动。与主轴1可滑动地连接的锤3产生旋转并撞击砧座的冲击力。 砧座被分成与锤子3接合的接合部分7和保持尖端工具16的尖端工具保持部分8.接合部分7和尖端工具保持部分8彼此锁定。 扭矩传递机构11使得接合部7和末端工具保持部8能够沿轴向可伸缩地彼此位移。 缓冲构件10设置在接合部分7和尖端工具保持部分8之间的间隙9a中,从而在吸收冲击力的轴向分量的同时传递冲击力的角分量。 可以在主轴1和砧之间插入附加的缓冲构件13。