| 摘要 |
PURPOSE: A prefabricated double layer is provided to improve reliability by inserting and fixing a plurality of wheel in which a belt groove is formed on the external diameter portion. CONSTITUTION: A belt groove is formed on the external diameter portion of a plurality of wheels. A connection ball is formed on the center portion of the plurality of wheels. A boss(10) laminates the plurality of wheels and fixes it. A gap member(12) is respectively arranged between wheels and forms wheel assembly by laminating the plurality of wheels. A connection body(11) is arranged behind the wheel assembly. The plurality of wheels and the boss are fixed to a fixing bolt by passing through a coupling hole of the gap member and the connection body. A muster groove and a muster protrusion are formed between the gap member and the connection body. |
