This invention relates to the field of
agricultural machinery technology and discloses a mechanism for adjusting the speed of a star wheel. The mechanism includes a
steel frame with star wheel shafts evenly distributed from bottom to top. Star wheel bodies are evenly fitted onto the star wheel shafts along their axial direction. Sprockets and chains are provided between adjacent star wheel shafts. A
hydraulic motor is mounted on the outside of the
steel frame. The mechanism also includes a centrifugal wheel, with its main body fixed to one end of the star wheel shaft. A radial groove is formed on the centrifugal wheel, and a centrifugal counterweight and a
cam are connected within the groove via a first serpentine spring. The main body is connected to one end of the star wheel shaft via a bearing, and a first
torsion spring is provided between its outer wall and the star wheel shaft. A connecting arm is provided between the
cam and the centrifugal counterweight. The mechanism utilizes a
hydraulic motor to independently drive the star wheel, achieving stepless speed regulation. Through the triple synergistic effect of
centrifugal force adaptive clamping force adjustment, automatic jamming clearance, and eccentric linkage vibration unblocking, it effectively prevents the star wheel body from jamming and
corn kernel damage, resulting in a high peeling rate, low kernel
loss rate, and stable operation.