Shaker with adjustable spring rate for harvesting machines and harvesting machines using such shakers

摘要

The shaker (5) has an animation branch (5a) and an active branch (5b) connected by a curved portion (5c), where a fixation end (5d) of the animation branch is connected to an actuation system while an end (5e) of the active branch is attached to a fixed support. The animation branch has a modification unit formed of an upper rigidification rod (5g) and an assembling unit (9), permitting to modify degree of stiffness or flexibility of the animation branch on a portion of its length, and to regulate degree of stiffness or flexibility of the shaker, where the shaker is in form of a hairpin loop. An independent claim is also included for a berry harvesting machine including a chassis provided with neutralization elements permitting establishment of connection between the chassis and the branch.