| 摘要 |
PURPOSE:To contrive an improvement in sealing properties of a bearing part, by a method wherein a spring is provided between a sleeve and sealing collar outserted over an agitating blade shaft for mounting turnably an agitating blade body of a concrete mixer on a drum with a shaft. CONSTITUTION:A pressure contacting flange 21 is provided on the outside of a sealing case provided on a boss 3a of a driving side and driven side of a drum 3, the flange 21 is outserted over a sleeve 22 outserted over a blade shaft 8, and a sealing collar 23 abutting against an end face of the outside of the pressure contacting flange 21 is outserted over the sleeve 22. A spring 25 is interposed between a sleeve 26 and the sealing collar which abut against an end face of the inside of a bearing 27 and are outserted ever the blade shaft 8. As the sealing collar 23 is brought into pressure-contact to the pressure contacting flanges 21, 24 with bounce of the spring, sealing properties become favorable. |
