A drive unit (20) includes: a housing (21); a motor (25) accommodated in the housing; a crank shaft (22) extending through the housing along the right-left direction of the bicycle; and a pair of bearings (38L, 38R) rotatably supporting the crank shaft within the housing, each bearing including an inner ring (381) and an outer ring (382). The pair of bearings are a first bearing (38L) which is provided at one side of a thrust direction and a second bearing (38R) which is provided at another side along the thrust direction, the thrust direction being an axial direction of the crank shaft. The first bearing is disposed so as not to move along the thrust direction relative to the crank shaft. The drive unit has a movement restricting structure to restrict movement of the first bearing relative to the relative to the housing along the thrust direction.
DRIVE UNIT AND ELECTRICALLY ASSISTED BICYCLE
ANTRIEBSEINHEIT UND ELEKTRISCH UNTERSTÜTZTES FAHRRAD
UNITÉ D'ENTRAÎNEMENT ET BICYCLETTE À DIRECTION ASSISTÉE
2021-10-06
Patent
Electronic Resource
English