| 摘要 |
PROBLEM TO BE SOLVED: To prevent current flow to a roll bearing for preventing the generation electric corrosion by providing a recess to the side in contact with an insulation material of a bearing bracket, and then engaging and fixing a projected part of insulation material providing the projected part corresponding to the recess of the bearing bracket to the recess thereof. SOLUTION: Recesses 5c, 5b are provided to a side which is in contact with an insulation material 2b of a bearing bracket 1b, and projected portions 6c, 6d are also provided to the insulation material 2b corresponding to the recesses 5c, 5d provided to the bearing bracket 1b. The recesses 5c, 5d are provided in the engaging side of the roll bearing. At assembling, the insulation material 2b is engaged with the bearing bracket 1b and is then pushed with the outer ring of roll bearing, clamping plate or pre-load spring or the like, thereby engaging and fixing the recessed area of bearing bracket with the projected portion of the insulation material. As a result, an electric rotating mash which can be assembled easily is attained, in such a structure that a current flowing to the roll bearing provided between the rotary shaft and motor case can be prevented. |
