| 摘要 |
673,190. Toothed gearing. HANSEN, D. Jan. 24, 1950 [Oct. 31, 1949], No. 1839/50. Class 80 (i). The casing 1 of a reduction gear unit is formed with' a removable side plate 8 having a, series of bores 9, 10, 11, 12 forming pairs with an identical series of bores in the opposite side of the casing. The pairs of bores are adapted to receive the bearings of shafts as required for selected pairs of gears to provide a desired reduction ratio and,disposition of input and output shafts, the bores not used being blanked off. A further opening 15 may be provided in the casing to receive a cover with a bearing adapted to enable a right-angled drive to be obtained with the use of bevel gears. Thus a single casing is adaptable to provide a series of reduction gear units with different ratios and different shaft dispositions. Three surfaces 2, 3 and 4 are machined to allow of securing the unit in three different planes. To provide for different powers a series of sizes of the casing may, be utilised but to enable standard sets of gears to be used in several sizes of the units all but one of the centre distances between the bores are repeated in each size. |
