PROBLEM TO BE SOLVED: To provide a steering angle ratio variable device comprising: a speed reducing (speed increasing) device including an inscribed planetary gear mechanism and a constant velocity internal gear mechanism; and a hollow auxiliary shaft comprising a body part externally inserted with a rotor of an electric motor and an eccentric part rotatably inserted, via a rolling bearing, to an external tooth gear constituting an inscribed planetary gear mechanism, with reduced occurrence of noise and vibration as well as reduced transmission error of a steering angle ratio owing to improved condition of load transmission by pins and pin holes constituting a constant velocity internal gear mechanism.SOLUTION: A constant velocity internal gear mechanism comprises: multiple pin holes 33 formed between an external tooth gear constituting an inscribed planetary gear mechanism and one end in an axial direction of a first shaft, and multiple pins 21 inserted respectively into the pin holes. A protrusion 34 is formed on a periphery surface of the pin hole 33. The protrusion 34 protrudes from the periphery surface of the pin hole 33 along a straight line L connecting a pitch circle center O2 of the pin hole 33 and a center O33 of a circle constituting the pin hole 33.SELECTED DRAWING: Figure 5
【課題】内接式遊星歯車機構および等速度内歯車機構からなる減速(増速)機と、電動モータのロータを外嵌する本体部と内接式遊星歯車機構を構成する外歯歯車に転がり軸受を介して回転自在に設置される偏芯部とを有する中空の補助軸と、を備えた舵角比可変装置の、等速度内歯車機構を構成するピンとピン穴とによる荷重伝達状態を良好にして、音や振動の発生および舵角比の伝達誤差を低減する。【解決手段】等速度内歯車機構は、内接式遊星歯車機構を構成する外歯歯車と第一軸の軸方向一端との間に形成された、複数のピン穴33と複数のピン穴にそれぞれ入る複数のピン21とからなる。ピン穴33の周面に突起34が形成されている。突起34は、ピン穴33のピッチ円中心O2とピン穴33をなす円の中心O33とを結ぶ直線Lに沿って、ピン穴33の周面から突出している。【選択図】図5
STEERING ANGLE RATIO VARIABLE DEVICE
舵角比可変装置
2018-06-21
Patent
Electronic Resource
Japanese