| 摘要 |
<p>PURPOSE: To improve rupture strength and a vibrating characteristic by constituting a hollow shaft of a plural number of pipe parts and collars frictionally making contact with each other and fixing driving elements on each of the pipe parts and collars by frictional contact. CONSTITUTION: Pipe parts 13, 14, 22a, 22b are internally installed in an outside pipe 9, a collar 10 is provided on an outer periphery of the outside pipe 9, a hollow shaft 1 is formed by frictionally making each of them contact with each other, a driving element 2 is fixed on the outside pipe 9, a driving element 3 is fixed on the collar 10 and a driving element 4 is fixed on the pipe part 14 by frictional contact. Consequently, as it comes to be free to slide between the outside pipe 9, the pipe parts 13, 14, 22a, 22b and the collar 10, and rupture strength and a vibrating characteristic are improved.</p> |
