To provide a wiper motor comprising an operation mode in which a speed of oscillating a wiper is changed in accordance with an oscillation position and further a speed reduction mechanism configured more efficiently which is favorable in downsizing the wiper motor, and a vehicular wiper device.SOLUTION: A speed reduction gear pair constituting a speed reduction mechanism 29 is made to have the function of changing a speed of oscillating a wiper 13, by utilizing the fact that radii r11, r12, r 21 and r22 respectively vary in an angular range in which parts 32a and 33a engaged with an eccentric circular transmission gear 32 at a front stage side and a non-circular output gear 33 at a rear stage side engage with each other, and is also made to have the function of decelerating a rotation transmission, by utilizing the fact that a rotation ratio of the non-circular output gear 33 becomes smaller than a rotation ratio of the eccentric circular transmission gear 32 when setting an angular range of engagement of the part 33a engaged with the non-circular output gear 33 to be smaller than the angular range of engagement of the part 32a engaged with the eccentric circular transmission gear 32.SELECTED DRAWING: Figure 1
【課題】ワイパの揺動動作速度を揺動位置に応じて変化させる作動態様に加えワイパモータの小型化に有利なより効率的な構成の減速機構を備えてなるワイパモータ及び車両用ワイパ装置を提供する。【解決手段】減速機構29を構成する減速ギヤ対において、前段側の偏心円形伝達ギヤ32と後段側の非円形出力ギヤ33との各噛合部32a,33aが互いの噛み合う角度範囲内でそれぞれ半径r11,r12,r21,r22が変化することを利用し、ワイパ13の揺動動作速度を変更する機能を持たせる。また、偏心円形伝達ギヤ32の噛合部32aより非円形出力ギヤ33の噛合部33aの方の噛み合いの角度範囲を小さく設定して偏心円形伝達ギヤ32よりも非円形出力ギヤ33の回転比が小さくなることを利用し、この間での回転伝達を減速させる機能を持たせる。【選択図】図1
WIPER MOTOR AND VEHICULAR WIPER DEVICE
ワイパモータ及び車両用ワイパ装置
2021-11-18
Patent
Electronic Resource
Japanese
IPC: | B60S SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR , Warten, Reinigen, Instandsetzen, Unterstützen, Anheben oder Rangieren von Fahrzeugen, soweit nicht anderweitig vorgesehen / F16H Getriebe , GEARING / H02K Dynamoelektrische Maschinen , DYNAMO-ELECTRIC MACHINES |