To provide a drive unit and a power-assisted bicycle with the drive unit that can maintain inner rigidity while providing two outer parts.SOLUTION: A drive unit (20) is attached to a vehicle body frame (12) of a power-assisted bicycle (10) to generate drive power transmitted to a wheel (14R). A housing (21) of the drive unit includes: a first case (211) having a recessed portion (404) for housing an electric motor (25); a second case (212) serving together with the first case as an outer part of the housing; and an inner cover (213) for covering at least a portion of the electric motor. The inner cover supports a gear rotation shaft (241) such that the gear rotation shaft is rotatable, and an outer circumferential edge of the inner cover passes between the gear rotation axis and a pedal crank shaft (22). The recessed portion of the first case includes a wall portion (406) along the periphery of the electric motor. The wall portion supports the inner cover.SELECTED DRAWING: Figure 7

    【課題】外郭部品を2つにしつつ、内部の剛性を維持することが可能な駆動ユニット、およびその駆動ユニットを備えた電動補助自転車を提供する。【解決手段】駆動ユニット(20)は、電動補助自転車(10)の車体フレーム(12)に取り付けられ、車輪(14R)に伝達される駆動力を発生させる。駆動ユニットのハウジング(21)は、電動モータ(25)を収容する凹部(404)を有する第1ケース(211)と、第1ケースと共にハウジングの外郭となる第2ケース(212)と、電動モータの少なくとも一部を覆う内蓋(213)とを有する。内蓋は、歯車回転軸(241)を回転可能に支持し、かつ、その外周縁が歯車回転軸とペダルクランク軸(22)との間を通る。第1ケースの凹部は、電動モータの周囲に沿う壁部(406)を有する。壁部は内蓋を支持している。【選択図】図7


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    Title :

    DRIVE UNIT AND POWER-ASSISTED BICYCLE


    Additional title:

    駆動ユニットおよび電動補助自転車


    Contributors:

    Publication date :

    2021-04-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer



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