09-09-2017, 01:20 PM
Geneva Mechanism is commonly used indexing mechanism where intermittent movement is necessary. The reverse Geneva mechanism, which is a variation of the Geneva mechanism, is used when the wheel has to rotate in the same direction as the crank. It requires less radial space and the locking device may be a circular segment attached to the crank locking by rubbing against a flange constructed at the periphery of the wheel. The design and manufacture of a conventional Geneva mechanism is generally simple and inexpensive because there is no specially curved profile in any of the components except in straight lines and circular arcs. However, due to the discontinuity of the acceleration in the initial and final positions, the short use of the conventional Geneva mechanism is the great impact when the trailing crank engages and disengages with the wheel slot.
In this mechanism, for each turn of the drive wheel A, the drive wheel B makes a quarter turn. The pin, attached to the drive wheel A, moves in the grooves causing the movement of the wheel B. The contact between the lower parts of the actuator A with the corresponding hollow of the wheel B holds it in position when the pin is out of the slot. Wheel A is cut close to the pin as shown to provide clearance for wheel B as it moves. If one of the slots is closed, A can make less than one turn in any direction before the pin touches the closed slot and stops the movement.
The Geneva drive is used to provide intermittent motion, the drive wheel rotates continuously, the bolt on the drive wheel then rotates the quarter-piece cross shape part for each drive wheel revolution . The crescent-shaped cut on the drive wheel allows the points of the cross to pass through, the rest of the circle blocks the slotted wheel in place while it is stationary. The movement of the unit can be changed by changing the number of slots in the slotted wheel. The Geneva Drive mechanism is commonly used in film projectors to move the film in one frame at a time holding it still while the bright projector light shines through it. The design of the disk and the drive of geneva is done using software catiaV5 and the used drive is of four slots. Disk and drive analysis of geneva is done by static loading condition of ANSYS 16. The MSPlate is the material used for the geneva wheel and msword is used for shaft and steel plate is used for crossing of Geneva. by motor to the driving gear of the device. In the most common arrangement, the driven wheel has four slots and thus advances for each rotation of the drive wheel by a 90 ° pitch. If the drive wheel has groove n '.
In this mechanism, for each turn of the drive wheel A, the drive wheel B makes a quarter turn. The pin, attached to the drive wheel A, moves in the grooves causing the movement of the wheel B. The contact between the lower parts of the actuator A with the corresponding hollow of the wheel B holds it in position when the pin is out of the slot. Wheel A is cut close to the pin as shown to provide clearance for wheel B as it moves. If one of the slots is closed, A can make less than one turn in any direction before the pin touches the closed slot and stops the movement.
The Geneva drive is used to provide intermittent motion, the drive wheel rotates continuously, the bolt on the drive wheel then rotates the quarter-piece cross shape part for each drive wheel revolution . The crescent-shaped cut on the drive wheel allows the points of the cross to pass through, the rest of the circle blocks the slotted wheel in place while it is stationary. The movement of the unit can be changed by changing the number of slots in the slotted wheel. The Geneva Drive mechanism is commonly used in film projectors to move the film in one frame at a time holding it still while the bright projector light shines through it. The design of the disk and the drive of geneva is done using software catiaV5 and the used drive is of four slots. Disk and drive analysis of geneva is done by static loading condition of ANSYS 16. The MSPlate is the material used for the geneva wheel and msword is used for shaft and steel plate is used for crossing of Geneva. by motor to the driving gear of the device. In the most common arrangement, the driven wheel has four slots and thus advances for each rotation of the drive wheel by a 90 ° pitch. If the drive wheel has groove n '.