PROBLEM TO BE SOLVED: To provide a rack shaft capable of reducing a shaft length, and a power steering device having the rack shaft.SOLUTION: A rack shaft 13 comprises: a rack tooth formation part 13A in which an effective rack tooth row 131 is formed by plastically deforming an outer peripheral surface of a shaft member W into a concave shape; a non-rack tooth part 13B having no rack tooth; and a connection part 13C for connecting the rack tooth formation part 13A and the non-rack tooth part 13B, which is located at an end part in a shaft direction of the concave shape and is plastically deformed according to the plastic deformation of the rack tooth formation part 13A. Non-effective rack teeth 134 adjacent to the effective rack tooth row 131 are formed in the connection part 13C.SELECTED DRAWING: Figure 3A
【課題】軸長の短縮化を図ることができるラック軸及びそのラック軸を備えるパワーステアリング装置を提供する。【解決手段】本発明に係るラック軸13は、軸部材Wの外周面を凹状に塑性変形させて有効ラック歯列131を形成したラック歯形成部13Aと、ラック歯を有しない非ラック歯部13Bと、凹状の軸方向端部に位置し、ラック歯形成部13Aの塑性変形に伴って塑性変形され、ラック歯形成部13Aと非ラック歯部13Bとを連結する連結部13Cと、を有し、連結部13Cには、有効ラック歯列131に隣り合う無効ラック歯134が形成される。【選択図】図3A
RACK SHAFT AND STEERING DEVICE
ラック軸及びステアリング装置
2016-04-14
Patent
Elektronische Ressource
Japanisch
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