MOTOR UNIT AND ELECTRIC BICYCLE

• Main Author: KAWAKAMI MASAFUMI
• Format: Patent
• Language: English; Japanese
• Published: 05.07.2023
• Subjects: ACCESSORIES PECULIAR TO CYCLES AND NOT OTHERWISE PROVIDED FOR,e.g. ARTICLE CARRIERS, CYCLE PROTECTORS; CYCLE SADDLES OR SEATS; CYCLES; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; PERFORMING OPERATIONS; POWERED PROPULSION OF SLEDGES OR; RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES; TRANSPORTING

To provide a motor unit that can easily be reduced in the size of a case by reducing the width of the case and to provide an electric bicycle.SOLUTION: A motor unit 3 includes: a case 4; a motor 5 accommodated in the case 4 and having a motor rotation shaft 51 and a rotor 52 that rotates integrally with the motor rotation shaft 51; an input shaft 6; an output body 8; and a speed reduction mechanism 9. The input shaft 6 extends through the case 4 in the direction of the axis 600 and is disposed so as to be rotatable about the axis 600. The output body 8 extends through the case 4 in the direction of the axis 600 and is disposed so as to be rotatable about the axis 600. The speed reduction mechanism 9 is accommodated in the case 4, reduces the speed of rotation of the motor 5 and transmits the rotation to the output body 8. The speed reduction mechanism 9 includes a plurality of pairs (91, 92) of gears (911, 912; 921, 922) that mesh with each other. In at least one pair of the plurality of pairs of gears, respective central axes of rotations of the gears are orthogonal to each other.SELECTED DRAWING: Figure 3 【課題】ケースの幅を短くしてケースの小型化を図りやすいモータユニット及び電動自転車を提供する。【解決手段】モータユニット３は、ケース４と、ケース４内に収容され、モータ回転軸５１と、モータ回転軸５１と一体に回転するロータ５２とを有するモータ５と、入力軸６と、出力体８と、減速機構９と、を備える。入力軸６は、軸線６００方向にケース４を貫通して軸線６００回りに回転可能に配置される。出力体８は、軸線６００方向にケース４を貫通して軸線６００回りに回転可能に配置される。減速機構９は、ケース４内に収容され、モータ５の回転を減速して出力体８に伝達する。減速機構９は、互いに噛み合う歯車（９１１、９１２、９２１、９２２）の対（９１、９２）を複数有する。複数の歯車の対のうち少なくとも一対は、各歯車の回転の中心軸が互いに直交する。【選択図】図３