| 摘要 |
The casing (1) of which is preferably composed of two tube parts (2) and (3) and of a flange (4). The worm wheel (25) between the bearings (16) is inserted in the worm (29) between the spacers (26) or is designed without spacers (26). Bearings (16) are built in the centering bushes (17) extending to one or two seals (21) inserted on the lateral part of the tube (2). Between the tube (2) and the centering bush (17) there is a circular seal (19) either in a groove on the tube (2) or in a groove on the centering bush (17). The reduction gear has a supporting connection (5) for a steering wheel (6) which is preferably placed and centered in the axle of the worm wheel (25).
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