In the countries bordering the Mediterranean Sea (and beyond) this time of year is dedicated to the olive harvest.
As described in the previous article (…..) Cifarelli produces shakers for olive harvesting since 1998; currently we produce two models: SC800 and SC105.
Although the two machines have different characteristics, the operating principle is the same: a combustion engine moves a rod, which at its end there is a hook that, shaking the branch, makes the olives fall.
But how is made a shaker?
As already said, the Cifarelli shaker consists of a 2-stroke combustion engine and a gearbox.
The engine is similar to those that are commonly mounted on the normal motorcycles: it is formed by a cylinder and a piston with a displacement of 52 cc, the explosion within the combustion chamber moves down the piston which, through a rod, gives rotation to the crankshaft.
At the end of the crankshaft there is the flywheel A, on which is mounted a clutch, formed by two masses (B1 and B2) joined by a spring (C); the centrifugal force exerted by the rotation of the flywheel (from 10500 to 12800 rpm) distances the two masses which, for friction, adhere to the inner walls of the clutch bell, putting it in turn moving (rotating).
The clutch bell D is directly mounted on the pinion E of the gear box and rotates on a crown gear F; the pinion and the crown are identified by a serial number identical for both, because they are processed together to ensure the best coupling possible and reduce friction and clearance between the parts.
This group, together with the connecting rod G (connected to the crown F), transforms the rotary motion of the bell in alternate linear motion (forward and backward) of the connecting rod.
The rod L is connected to the connecting rod G through a swivel joint H which allows the rotation of the rod.
The gear box encloses this transmission system which is immersed in oil, to lubricate and cool the parts. The processing of the two half casings that compose the gear box is performed in pairs on a numerical control to ensure a better coupling.
On the rod L, and here we are in the visible part of the machine, through a eccentric joint M, it is connected the pole whose end is mounted the hook (the one that shakes the branch).
At this point, just hook the branch and accelerate to shake.
For “wear” the machine, there is the ergonomic padded shoulder strap (for a better comfort).
Furthermore it has two amortized handles that reduce considerably the vibrations transmitted to the body and arms of the user; in the right handle there is the throttle lever for controlling the phases of shaking.
All the shakers produced from the assembly line are tested in a soundproofed rehearsal room and turned on one by one, leaving the engine running at full power for 2 minutes.
Subsequently the shaker is “labeled” with the serial number through an indelible marker and packed.
The knowledge of the functioning of the shaker is not important to collect faster your olives; however, allows you to consider the machine from a different point of view, appreciating the technology needed for its project and production.
Generally in mechanics it is normal trying to eliminate vibrations, while the shaker, due to the nature of the work to accomplish, creates them; these stresses require high quality of the mechanical components, an indispensable requirement for a professional machine.