| 摘要 |
PURPOSE:To raise the productivity, support a bearing surely and prevent the creep of a vehicle by constituting a plural number of bearing boxes into a unitary body. CONSTITUTION:A set of a side plate A is formed by calking a stud 18 to the side plate A7, while a set of a bearing box is formed by pressing a bearing 5 in bearing boxes 21 and 22 which are made into a single body by forming a plural number of them into one body. The set or the bearing box related to the bearing box 21 is inserted into a hole for bearing made in the above set of the side plate A, a set of gears of each stage is inserted, and the set of bearing box related to the bearing box 22 is inserted. After that, a side plate B8 is fitted based on the hole part for bearing, fixed monolithically through tightening by a screw 13, and formed into a set of a gear train. Next, since a gear box 1 is provided with a hole for supporting a bearing 6 and further has a spigot joint of the same diameter with the external diameters of side plates A7 and B8, the set of the gear train is inserted based on these and fixed by a screw 17. Then, a washer 15 and a C ring 14 are incorporated for fixing the bearing 6 in the axial direction.
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