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    • 45. 发明授权
    • Method and apparatus for reducing gear backlash impacts in an elevator
system
    • 减少电梯系统齿轮间隙冲击的方法和装置
    • US4616733A
    • 1986-10-14
    • US674632
    • 1984-11-26
    • Toshiaki Ishii
    • Toshiaki Ishii
    • B66B5/00F16H57/12F16H59/14F16H59/46
    • B66B5/00F16H57/12F16H59/14F16H59/46F16H2057/123
    • Collision impacts between meshing gears in a speed reduction mechanism 11 of an elevator system due to backlash during transitions between power/driving and regenerative/driven modes of operation are reduced by detecting the actual or approaching separation of the gear teeth, and in response thereto temporarily reducing the motor torque to correspondingly reduce the equalized relative speed difference between the input and output shafts of the mechanism. Tooth separation may be detected by sensing a difference in amplitude between signals proportional to the input and output shaft speeds, equalized in accordance with the gear ratio, or by sensing a polarity change in the motor drive current. The motor torque may be reduced by the relay controlled switching of resistors 40, 43 in a speed controller to thereby convert the function of an operational amplifier 45 therein from a first order time lag circuit to an integrator.
    • 通过检测齿轮齿的实际或接近的分离,减少了在电力/驱动和再生/驱动的运行模式之间的过渡期间由于反向间隙而导致的电梯系统的减速机构11中的啮合齿轮之间的碰撞冲击,并且响应于此临时 降低电动机转矩,以相应地减小机构的输入和输出轴之间的相等的相对速度差。 可以通过感测与根据传动比相等的输入和输出轴速度成比例的信号之间的振幅差或通过感测电动机驱动电流的极性变化来检测齿分离。 可以通过速度控制器中的电阻器40,43的继电器控制切换来减小电动机转矩,从而将其中的运算放大器45的功能从一阶时滞电路转换为积分器。