DRIVE UNIT AND ELECTRICALLY ASSISTED BICYCLE

DRIVE UNIT AND ELECTRICALLY ASSISTED BICYCLE

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 i...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: USAMI, Tomohiro
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
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
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Beschreibung
Zusammenfassung: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.