| 摘要 |
PROBLEM TO BE SOLVED: To provide a sprocket with a simple structure and light weight excellent in corrosion-resistance and wear-resistance of a key groove part, and a sludge scraping-up device using the sprocket. SOLUTION: A sprocket body 3 is a circular disk-like member having a plurality of teeth 5 on a periphery, and a boss hole 11 penetrated through the sprocket 1 is provided on a center. The boss 7 is a member having a shaft hole 15 penetrating through the boss 7 at a center. A plate installation part 19 is provided on an end surface of the boss 7. The sprocket body 3 is clamped by a pair of bosses 7, and a plate 9 installed on the plate installation part 19 is clamped between the boss 7 and the sprocket body 3. The key groove 27 is provided on a bottom surface of the plate 9 and is a groove of rectangular cross section having a release part on the shaft hole 15. COPYRIGHT: (C)2009,JPO&INPIT
|
