| 摘要 |
PURPOSE: Drain plug structure of a transmission is provided to remove iron powder adhered to permanent magnet without separating a drain plug from the transmission by improving structure of the drain plug. CONSTITUTION: A drain plug forms an auxiliary bolt(7) having a pitch corresponding to a screw mounted on an upper side of a permanent magnet(5). A height of the bolt is 1/3-1/2 range of height of a drain hole(2). A size of the permanent magnet is decided by considering removing period of the iron powder to install a space unit between the auxiliary bolt and the drain plug. Thus, the iron powder is generated in a transmission(1) by wear of a bearing and a gear through travelling, and is dropped by self-weight. Thereby, the iron powder is attached to the permanent magnet located between the bolt and the drain plug. |
