According to the body mechanism design of power supports in coal business, this paper introduces some simple design methods of approximate straightlinemechanism.
结合煤炭行业液压支架主体机构的设计，介绍了几种近似直线机构的简易设计方法。
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On the basis of mechanism kinematics knowledge, a new synthesis method for double straightlinemechanism is proposed to solve the synthesis problem of double straightlinemechanism.
Disclosed is a mold head apparatus of a spring molding machine, comprising a rotation control mechanism, a straight-line moving mechanism, a rotating head and a mold head;