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长期来,乐器工作者对弓弦乐器的调弦机构进行了深入的研究和改革。蜗轮蜗杆以它结构紧凑、传动平稳、无噪声、大传动比、蜗杆开角小于摩擦角、蜗轮主动时发生自锁等,而被广泛采用到胡琴类的调弦机构上。然而它也存在一些不足的方面。例如:蜗杆传动时,在啮合齿面间会产生相当大的滑动速度,因而导致了齿面的摩擦热和磨损,其磨损程度比起齿轮传动要严重得多。由此而引起的主要失效形式表现为齿面的胶合和磨损,齿面的点蚀和蜗轮轮齿弯曲折断现象亦常出现。上述问题会给调节、固定和保持弦的张力带来麻烦。对齿面
For a long time, musical instrument workers carried out in-depth research and reform on the tuning mechanism of bowed stringed instruments. Worm gear with its compact structure, smooth transmission, no noise, large transmission ratio, the worm angle is less than the friction angle, the worm occurs when the active self-locking, etc., has been widely used to Huqin tuning mechanism. However, it also has some shortcomings. For example, when the worm is driven, a considerable sliding speed is generated between the meshing tooth surfaces, resulting in frictional heat and wear of the tooth flanks, which wear more seriously than gear transmission. The main failure forms caused by this are the gluing and wearing of the tooth flanks, the pitting of the tooth flanks and the bending and breaking of the worm gear teeth. The above problems will bring trouble to adjusting, fixing and keeping the string tension. On the tooth surface