The invention discloses a design method of an automatic orienting device for big ends of eggs. The automatic orienting device for the big ends of eggs comprises a
rowing region, an overturning region and a
combing region in sequential arrangement. Time t1 required for an egg to complete the
maximum displacement A-L on support rollers along an axial direction within the
rowing section is computed via a formula, length of the
rowing section is obtained according to the time t1 and the formula; length W of a bending section of each limit guide rod in the overturning region is computed via the formula; length D' of the overturning region, time t2 required for an egg to complete the
maximum displacement A-L on support rollers along an axial direction within the
combing region is computed, and length of the
combing region is computed; and total length of a working area is obtained by summing the B, the D', the P, the length of a feeding region and the length of a discharging region. By the aid of the design method of the automatic orienting device for the big heads of eggs, structural parameters of above regions and bending sections of the limit guide rods are optimized, structural size of a whole
machine is further optimized, and transmission efficiency between the eggs and the support rollers is improved.