关键词: 煮熟茧, 翻斗机构, 齿轮传动, 凸轮机构, 间歇机构

Abstract: Silkworm culture is one of the traditional cultures in China. The silk processing industry is a symbol of traditional Chinese culture, and therefore, it is important for us to vigorously develop the silk processing industry in the future. At present, foreign technologies and equipment are mainly used in the silk processing industry, and the research progress of related domestic equipment is quite slow. For example, in the past few decades, there has been no breakthrough in the development of silk reeling machines, and it is still unable to achieve a high level of automation in this field. Processes like reeling must be manually involved. For the feeding of cooked cocoons from the cocoon cooking machine to the head of the reeling machine, it is necessary to go through a series of actions, such as manual cocooning, cocoon feeding, cocoon unloading, and adding cocoon and other actions. It requires several cocoon workers to continuously feed cocoons. In the process of manual feeding, there are some problems, such as long cocoon feeding time, uncertain cocoon feeding amount, extrusion and collision of cooked cocoons during the feeding process. All these can affect the silk reeling process and lead to the deterioration of raw silk quality. The feeding of cooked cocoons is a key process linking the cocoon cooking and the silk reeling processes. Therefore, it is necessary to find an automatic feeding method that can replace the traditional cocoon feeding method.
To solve the problems of high labor intensity, low conveying efficiency and long waiting time for reeling in the process of cooked cocoon feeding in the silk reeling enterprises, we analyzed the traditional method of cooked cocoons feeding and sought solutions. Through the study of existing cooked cocoon feeding mode, an automatic feeding mode was designed to replace the traditional cooked cocoon feeding. In order to realize the loading, feeding and cocoon tipping of the feeding trolley in automatic feeding, a bucket-tipping device of the cocoon feeding trolley was designed. The bucket-tipping device drives the flip of the cocoon bucket through the reducer motor and the transmission mechanism to realize cocoon tipping action and the reset action of the cocoon bucket after tipping cocoons. The transmission mechanism is composed of gears, groove wheels and a cam intermittent mechanism. The working principle of the device, the calculation process of the cam design, the transmission route of the mechanism and the main structural analysis based on engineering mechanics were analyzed in detail, and the feasibility of the mechanism was verified by CAE analysis. Finally, the tipping mechanism was designed and assembled, and the pilot test was carried out in the enterprise. The tests show that the developed device works well. The weight of cocoon feeding was set for each group of silk reeling machines. The cocoon feeding data of the cocoon feeding trolley under different weights during three working days were statistically analyzed. The results show a maximum error of 1.31 % for cocoon feeding. The balance of the cocoon feeding trolley for each silk reeling machine was verified with the allocated amount of cooked cocoons within the allowed range. The use of this device can replace six cocoon feeding workers, realize the automatic feeding and instant use of cooked cocoons, and improve the production efficiency of enterprises.
The application of the bucket-tipping device in the transport of cooked cocoon feeding optimizes the process of silk processing. The results of this study can provide solutions for cooked cocoon conveying in silk reeling enterprises.

Key words: cooked cocoon, bucket-tipping mechanism, gear drive, cam mechanism, intermittent mechanism