| 摘要 |
<p>PURPOSE:To reduce the number of parts and improve the assembly efficiency by overlapping the opposing rims of protection covers placed on the bottom face of a pad and on the column side of a boss plate respectively. CONSTITUTION:A boss plate 17 has a protection cover 25 formed around it and a pad part 56 has a pad-side cover 59 formed on the bottom face thereof. The opposing rim parts of the cover 59 and the protection cover 25 are overlapped on each other with a clearance therebetween. Each of the spoke parts 23 which are stuck to the boss plate 17 has the coating member 22 with which each of extension parts 24 each radiated in one direction is unified. At the assembly time, the protection cover 25 is inserted in the boss plate 17 from the side of a column part, and the rear face of a spoke part 23 is overlapped with a flange part 26a and screwed up. Thus, the entire planetary gear mechanism may be protected and the number of parts be reduced.</p> |
