| 摘要 |
PURPOSE: To reduce overall height by causing both a worm gear driven by a motor and a rope drum driven by the gear to be borne on a bearing pin within a casing comprising separate units combined. CONSTITUTION: A first separate unit 1 is formed by inserting a bearing pin 4 coaxially into a casing 3, securing an electric drive 5 to the casing 3, and forcing the worm drive 5a of the drive 5 into the casing 3. A bush 7a provided integrally with a worm gear 7 is engaged in a hole 2a in a casing shell 6 and a rope drum 8 is borne on the bush 7a so as to form a second separate unit 2. The bearing pin 4 of the separate unit 1 is inserted into the hollow section of the bush 7a of the separate unit 2 so as to combine both of the separate units 1, 2. |
