Design of Automatic Multipurpose Indian Flatbread Maker
501
Fig. 7 Sprocket and chain mechanism
2.3 Sprocket and Chain Mechanism
Power from motor drive is also providing energy to the conveyors. To transfer this
power, we needed an integrated sprocket chain mechanism. It required two steps [3].
• To transfer power vertically from the drive to a middle sprocket.
• To transfer power horizontally from middle sprocket to conveyor (Fig. 7).
So here, sprocket A is mounted on gearbox output shaft (on which cam is also
mounted) and sprocket B is mounted on shaft which is further mounted on the two
bearings on the lower section of the main frame. This sprocket chain mechanism
provides 9.6 RPM speed at the end (Table 1).
In the second step, sprocket C mounted on the same shaft as sprocket B transfers
the motion to larger sprocket D. Sprocket D is mounted on the shaft connected to the
conveyor assembly. So finally, motion is transferred from motor drive to conveyor
assembly but at a lower speed 8 RPM. Such a slow speed is required to provide the
roti enough time to be baked (30 s).
2.4 Conveyor Assembly
For baking chapatti, we are using conveyor mechanism. It is one of the most important
part on this machines, not only because it should meet the requirement but also
because it is to be chosen such that the price of the product should not raise beyond
par.
501
Fig. 7 Sprocket and chain mechanism
2.3 Sprocket and Chain Mechanism
Power from motor drive is also providing energy to the conveyors. To transfer this
power, we needed an integrated sprocket chain mechanism. It required two steps [3].
• To transfer power vertically from the drive to a middle sprocket.
• To transfer power horizontally from middle sprocket to conveyor (Fig. 7).
So here, sprocket A is mounted on gearbox output shaft (on which cam is also
mounted) and sprocket B is mounted on shaft which is further mounted on the two
bearings on the lower section of the main frame. This sprocket chain mechanism
provides 9.6 RPM speed at the end (Table 1).
In the second step, sprocket C mounted on the same shaft as sprocket B transfers
the motion to larger sprocket D. Sprocket D is mounted on the shaft connected to the
conveyor assembly. So finally, motion is transferred from motor drive to conveyor
assembly but at a lower speed 8 RPM. Such a slow speed is required to provide the
roti enough time to be baked (30 s).
2.4 Conveyor Assembly
For baking chapatti, we are using conveyor mechanism. It is one of the most important
part on this machines, not only because it should meet the requirement but also
because it is to be chosen such that the price of the product should not raise beyond
par.