abstract
The graduation design is aimed at the reduction devices part of wall-whirling motor hoists in graduation practice. Motor hoist is characterized by small volume, light weight, simple operation, and easy to use, so it is applied to wide range of factories, most commonly industrial and mining enterprises, warehousing wharfs, etc. It's the most flexible in hoist application. Lighter tonnage motor hoists are widely used in conveying light weight workpieces, and occupy a very important position. Most motor hoists are manipulated by people on the ground with buttons, or in driver-room, or distant controlled in cable(or without cable), therefore, the installation, the operation and the maintenance are quite convenient. However, the motor hoists applied in China now are not delicate enough, with heavier weight, especially the reduction devices make up a great part of the weight. How to design it rationally and concise structure weight is our topic for study. The design is aimed at the eduction devices part of wall-whirling motor hoists and the main content is the chioce, arrangement and proofread of the gear axle, screw bolt, key, beam of the the reduction devices part of wall-whirling motor hoists.
key words: motor hoist; gear axle, reduction device, screw bolt.
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