| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve workability in the work of attaching and detaching a bearing by using a bearing hydraulic nut. <P>SOLUTION: A bearing hydraulic nut 1 is constituted so that pressure oil is supplied to the space between the bottom face of a circular concave part 6a of a main nut 6 and a plunger 7 fitted slidably into the concave part 6a to push out the plunger 7. An inward flange 8b which is opposed to a part of the plunger 7 in the axial direction is formed on a sub nut 8 to be screw-joined to a male screw part 6b of the outer peripheral surface of the main nut 6. The sub nut 8 is screwed to presses the plunger 7 which is pushed out of the main nut 6 by the inward flange 8b so as to push the plunger back to an initial position. Accordingly, when the plunger 7 is returned to the initial position, man-hours may not required more than before, and since a force is uniformly applied to the plunger 7 to move smoothly the plunger 7, the workability can be improved in the work of attaching and detaching the bearing. <P>COPYRIGHT: (C)2013,JPO&INPIT |
