Requirement of Low cost thresher
To increase the life period of the existing model Mr. Manivannan simply advises that the farmers had to frequently change Blade, Worker shaft, Crankshaft, 35 bearing weights since all the items were made with cheap Cast Iron. Based on the idea, he had developed the model with M.S. iron rods. He used thread bolts against the troublesome small bearings. It is based on the simple principle similar that of hand threshing performed by labourers in the field. It is operated by tractor PTO shaft. The output of the shaft is taken via 3 belts. One is at the foremost part used to separate the grains from the inserted husk and act as a huller, another at the rear is used to rotate the whole cylindrical body with fan attachment and the third is near the hopper used to separate the husks. In the inner portion 700 M.S. iron rods are attached to rotate the inserted material and performed the threshing operation by entering them into 6 sub portions. But the existing model has only 8 blades. Belts are attached with the help of cylindrical iron wheels made with M.S. iron. It is non-separable. So, all the auxiliary parts are long lasting. The material inserted should undergo 3 rotations to separate the grains individually and inert chaff materials will be exerted out with the help of fan. Since the mechanism is similar that of hand threshing there will not be any possibility of damaging grains and it is done by reduction facility arrangement of RPM of drum with wheel. The stones and other unwanted debris could be removed with the help of 3m.m. gauge sieves attached. The tractor plunge can easily be fitted with the thresher. Diesel consumption is 3 litres per acre and per hour threshing efficiency is 40 bags, i.e. (40 x 75kgs per bag =3,000kgs). As the cautious attachments are fully protected in this new machine there will not be any damage to the working labourers. The cost is around Rs.1,45,000/-and per hour rental fee is Rs.400/-. So far he has sold 20 machines along and hiring is also possible. Now he is manufacturing new machines in his lathe workshop. Comparison between the previous model and New model Sl.No Existing old model New type thresher 1. It separates the grains by It separates the grains grinding the inserted matter. similar that of beating grains manually for 8 times. 2. More number of wastage of No wastage of single grains. grain. 3. It is operated by Diesel oil It is operated with Tractor engine motor. PTO shaft. 1. It is laborious. (needs 10 skilled It needs 10 (6 Women men labourers along with labouers and 4men laborers) women labourers). Free and casual threshing operation is sufficient and thus it saves time and labour. 5. Threshing capacity is 20 bags 40-45 bags per hour. per hour. (70 kgs./bag.) 6. The chaff exerted out may induce The problem is not noticed weezing problems to the working here. labourers. 7. It is very difficult to transport It is portable. So it easily the machine. So the threshes grains harvested from efficiency is 200 bags per 15 acres (i.e.500-600 bags) day only. per day. 8. It is a crushing type thresher. So the It is beating type thresher. grains produced here is not able So the grains can be used to be utilized as seed material. as seed here. 9. Broken grains loss is 4% and the value is There is no broken grains Rs.1000/-per acre. loss. 10. There may be a chance of quarrel It is not possible here. between the labour and owner. 11. When the farmer is not available during This kind of mal practices threshing and as a result, is not possible. a supervisor or any of the labourers may lift or down the blade to complete the work quickly. It will create another 20% of grain loss. 12. The accessory items blade, crankshaft, All accessories are made Walker shaft are liable to breaking. with M.S. iron and it will not be easily be broken.
Manufacturing Capacity: b) Design Support
Problem Scale: Grave in india