Centrifugal shoe clutch structure

摘要

A centrifugal shoe clutch structure including: a clutch inner (81) configured to rotatably hold a plurality of clutch shoes (84) respectively including friction members (83), and connected to an input rotary member (55); and a clutch outer (82) connected to an output rotary member (45), provided surrounding an outer periphery of the clutch inner, configured to be connected to the clutch inner in accordance with rotation of the clutch shoes in an outer peripheral direction due to a centrifugal force, and thereby a rotary driving force of the clutch inner being transmitted to the clutch outer, wherein the clutch outer includes: a boss portion (86) fitted to the output rotary member; a drum portion (87) whose inner peripheral surface constitutes a cylinder-shaped friction surface (87a) configured to come into contact with the clutch shoes; and a connecting wall portion (88) connecting the boss portion and the drum portion together, and the boss portion, the drum portion and the connecting wall portion are integrally cast by use of the same cast iron material by casting.