To provide a worm wheel capable of reducing difference in an amount of a sink mark in each portion, an electric power steering device and a manufacturing method for a worm wheel.SOLUTION: On axial side surfaces 60A, 60B of an annular convex part 60, a plurality of small-diameter recess parts 61 (first small-diameter recess part 62, second small-diameter recess part 63) extending radially inward from an outer peripheral surface 61C of the annular convex part 60 are provided at predetermined intervals in a circumferential direction. The annular convex part 60 is fixed to a core metal part 50 by insert molding so as to embed a plurality of overhanging parts 53 of the core metal part 50. The tooth part 70 is fixed to the annular convex part 60 by injection molding so as to embed the outer peripheral surface 61C of the annular convex part 60.SELECTED DRAWING: Figure 2
【課題】各部位におけるヒケの量の差を低減可能なウォームホイール、電動パワーステアリング装置、及びウォームホイールの製造方法を提供する。【解決手段】環状凸部60の軸方向両側面60A,60Bには、周方向に所定間隔で、環状凸部60の外周面61Cから径方向内側に延びる複数の小径凹部61(第一小径凹部62、第二小径凹部63)が設けられる。環状凸部60は、芯金部50の複数の張出部53を埋め込むように、インサート成形で芯金部50に固着される。歯部70は、環状凸部60の外周面61Cを埋め込むように、射出成形で環状凸部60に固着される。【選択図】図2
WORM WHEEL, ELECTRIC POWER STEERING DEVICE, AND MANUFACTURING METHOD FOR WORM WHEEL
ウォームホイール、電動パワーステアリング装置、及びウォームホイールの製造方法
2022-07-05
Patent
Electronic Resource
Japanese
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