Tensioning sprocket to be applied to the row of a corn header
A tensioning sprocket designed to be mounted on the frame or row of a corn header of the type consisting of a control box ( 8 ) on which two drive gears ( 6 ) and ( 7 ) are mounted that generate the linear movement at the lifting chains ( 1 ) and ( 2 ), which maintain their adequate tension by action of the pair of tensioning sprockets ( 9 ) and ( 10 ) that are arranged on respective bearings ( 12 ) mounted on the appropriate carrier arms ( 11 ), wherein each tensioning sprocket includes an annular step ( 16 ) adjacent to its upper face; wherein each tensioning sprocket includes a annular embossment that defines a continuous circumferential line ( 17 ).
1 . A tensioning sprocket device, comprising:
a tensioning sprocket having a lower face with an internal perimeter edge having an adjacent annular embossment;
said annular embossment determining a mechanical interference with a bearing housed therein and defining a passive structural stop suitable for axially retaining said baring in position, said bearing mounted on a vertical shaft fixed at one end of a carrier arm arranged at a distal end in relation to a corresponding drive sprocket.
2 . The tensioning sprocket device according to claim 1 , wherein said annular embossment defines a continuous circumferential line along the internal perimeter edge, constituting a structural stop that axially limits the displacement of said bearing housed in a central bore.
3 . The tensioning sprocket device according to claim 1 , wherein said annular embossment is formed by a plurality of segments arranged one after the other following a circumferential path on the continuous circumferential line, constituting a structural stop that axially limits the displacement of said bearing housed in a central bore.
4 . The tensioning sprocket device according to claim 1 , wherein a respective lifting chain connects said tensioning sprocket to a drive sprocket.