| 摘要 |
PURPOSE:To reduce costs and to devise the commonness of a flange section by pressing and moulding a steel plate to make a bracket at load side and a flange section wherein coupling holes are formed at irregular intervals at the contact sections with the load bracket at the flange section. CONSTITUTION:A steel plate is pressed and moulded and a bracket at load side 30 having a bearing section 22, a closure section 17 and ventilation holes 9. Similarly, the steel plate is pressed and moulded and a flange section 31 having a flange surface 23 is formed. Furthermore, contact sections 32 which make contact with the closure section 17 for the bracket at loade side are made in the flange section 31 and ventilation flues 35 are provided between the bracket 30 and the contact sections 32 by producing plural concave places 34 at a part of the contact sections 32. Coupling holes 36 in the contact sections 32 are also provided by shifting by theta from the central shaft. In this way, the cost reduction will be planned without using casting items and the same flange section 31 will be shared even if the number of ventilation holes 9 is not the same. |
