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国产工程起重机的回转支承中,连接螺栓的防松采用弹簧垫圈或双螺母和平垫圈等,实际应用中均有不足之处。但日本加藤制作所生产的起重机,回转支承的连接螺栓均采用锥形弹簧垫圈,防松可靠,效果良好。作者将这一新型垫圈引用到国产起重机上,并从机理、计算、制造工艺,试验等方面作了分析和论述。
In the slewing bearings of domestic construction cranes, the use of spring washers, double nuts, and flat washers to prevent the loosening of the connecting bolts has disadvantages in practical applications. However, the cranes manufactured by Kato Manufacturing Co., Ltd. in Japan use conical spring washers for the connection bolts of the slewing bearings, which are reliable and effective. The author quoted the new type of washer to the domestic crane and analyzed and discussed the mechanism, calculation, manufacturing process, and testing.