Studies on Precision Grinding of Internal Gears and Internal Speed Changers

对自行设计制造的数控外齿轮磨齿机进行机构改进，研制出内齿轮磨齿机。在磨齿机上，利用伺服电机和单颗金刚石梳妆台，实现了内齿轮成形砂轮的自动修整。在试验的内齿轮磨床上加工出模数为4、60齿、齿宽为50 mm的内齿轮。此外，用于太阳齿轮和行星齿轮的外齿轮由试验齿轮磨床完成。由于内啮合齿轮传动的减速比不高，且不含差动机构，其传动效率可达98%以上，为此设计制造了两种提高减速比的差动齿轮传动，并进行了运行试验。此外，对轿车自动变速器的内齿轮系中的一些齿轮进行了磨削， 关于我们 研究了磨削对内啮合齿轮传动的噪声和传动效率的影响，试验结果表明，内啮合齿轮传动效率高，但噪声不低。内啮合混合减速器是一种很有希望的高性能内啮合齿轮传动装置，它是将两个内啮合齿轮中的一个内啮合齿轮用一个环形滚子代替，用太阳滚子和行星滚子代替内啮合齿轮。这些混合式减速器的运行噪音比内齿轮传动要低得多，因为齿间的冲击载荷被滚子间的油膜修正了。但是，当齿轮箱的尺寸假定为常数时，混合式减速器的动力传递能力比内齿轮传动要低。因此，在齿轮系统的设计和制造方法以及磨齿技术领域，需要进一步系统地研究以降低内啮合齿轮传动的运行噪声。少

An internal gear grinder was produced by improving the mechanism of a CNC (computer numerically controlled) external gear grinder which was previously designed and made by the present investigators. The form grinding wheel for internal gears was trued automatically on the gear grinder using the servo-motors and a dresser with a single diamond grain. Internal gears with a module of 4, 60 teeth and a face-width of 50 mm were finished on the trial internal gear grinder. Moreover, the external gears to be used for the sun and planetary gears were finished by the trial gear grinder. Power transmission efficiency of the internal gear drive with these gears is higher than 98% because the speed reduction ratio is not high and contains no differential mechanism.Two kinds of differential gear drives were designed and made to increase the reduction ratio, and running tests were conducted. Moreover some gears in the internal gear train of an automatic transmission of a passenger car were ground an … More d the effects of grinding on the running noise and power transmission efficiency were examined.The trial internal gear drives was high in the efficiency, but running noise was not low as expected. As hopeful high performance internal gear drives, internal hybrid reducer were designed and made, in which one of the two internal gears was replaced by a ring roller and the sun and planetary rollers were used instead of the gears. These hybrid reducers produced appreciably lower running noise than the internal gear drives because the shock loading between teeth is modified by the oil film between the rollers.However, it should be noted that the power transmission capacity of the hybrid reducers is lower than the internal gear drives when the sizes of the gear boxes are assumed to be constant. Therefore, further systematic investigation is required to reduce the running noise of internal gear drives in the field of the design and manufacturing method in gear systems together with gear grinding technology. Less