RACK SHAFT FOR DUAL PINION TYPE ELECTRIC POWER STEERING DEVICE, MANUFACTURING METHOD THEREOF, AND DUAL PINION TYPE ELECTRIC POWER STEERING DEVICE,申请号JP20130185473-传众专利搜索

RACK SHAFT FOR DUAL PINION TYPE ELECTRIC POWER STEERING DEVICE, MANUFACTURING METHOD THEREOF, AND DUAL PINION TYPE ELECTRIC POWER STEERING DEVICE

申请公布号：JP2015024801(A)

申请号：JP20130185473

申请日期：2013.09.06

申请公布日期：2015.02.05

申请人：

NSK LTD

发明人：OSAWA AKIRA

分类号：B62D3/12;B21D11/14;B21D51/16;B21D53/88;B21J5/06;B21K1/76;B62D5/04;F16H19/04;F16H55/26

主分类号：B62D3/12

摘要：<p>PROBLEM TO BE SOLVED: To realize a structure precisely regulating relationship in circumferential direction between both first and second rack teeth 13, 14 while suppressing increase in manufacturing cost.SOLUTION: Both first and second rack teeth 13, 14 are respectively formed at portions at which the phases in circumferential direction agree with each other, at two points separating in axial direction on an outer peripheral surface of a metal tubular material. Then, plastic process is applied, in axial direction, to twist the portion where the second rack teeth 14 are formed against the portion where the first rack teeth 13 are formed, so that, phases in terms of circumferential direction of both first and second rack teeth 13, 14 are different from each other.</p>