The combined design method of second design , CAD and optimal design is adoped to design 304304 type luffing mechanism for lorry crane, aiming at obtaining the dimension parameters of this mechanism.

• 采用反求设计(二次设计)、计算机辅助设计和优化设计相结合的设计方法编写计算程序，来反求随车起重机304304型变幅机构，以期得到其合理的尺寸参数。