Singulating device, agricultural implement and method of distributing granular material to ground
A singulating device ( 140 ) for singulating granular material comprises a base part ( 1401 ), a singulating part ( 1407 ) which is rotatable relative to the base part and which has a plurality of through-holes ( 14073 ) for receiving individual granules from said granular material with the ad of a pressure difference between opposite sides of the singulating part ( 1407 ), a closure part ( 1408 ) which is rotatable relative to the base part and which is attachable to the singulating part ( 1407 ), in order to form a closable space, such that the closure part ( 1408 ) is rotatable together with the singulating part ( 1407 ), and a motor ( 1409 ) for driving the closure part ( 1408 ) and the singulating part ( 1407 ). The singulating part ( 1407 ) is idly rotatably supported on the base part ( 1401 ). A drive shaft ( 14092 ) driven by the motor ( 1409 ) can be coupled to a driver arrangement ( 1408, 1413 ), in order to cause the driver arrangement to rotate. The singulating part ( 1407 ) is drivable by rotation of the driver arrangement ( 1408, 1413 ).
1 . Singulating device for singulating granular material, comprising:
a base part,
a singulating part, which is rotatable relative to the base part and which has a plurality of through-holes for receiving individual granules from said granular material with the aid of a pressure difference between opposite sides of the singulating part,
a closure part which is rotatable relative to the base part and which is attachable to the singulating part, in order to form a closable space, such that the closure part is rotatable together with the singulating part, and
a motor for driving the closure part and the singulating part,
wherein a drive shaft driven by the motor is couplable to a driver arrangement in order to cause the driver arrangement to rotate,
wherein the singulating part is drivable by rotation of the driver arrangement, and
wherein the closure part is releasably fixable to the singulating part, and
wherein, in a position when the closure part is disengaged from the singulating part, the singulating part is idly rotatably supported on the base part.
2 . Singulating device according to claim 1 , wherein the singulating part is mounted and supported on the base part.
3 . Singulating device according to claim 1 , wherein the base part has an outer wall and a central portion located at a distance radially inwards from the outer wall, wherein the singulating part is mounted and supported on the central portion.
4 . Singulating device according to claim 1 , wherein the motor comprises a motor body, wherein the drive shaft is drivable in rotation relative to the motor body, and wherein the motor body is mounted on the base part and extends through the singulating part.
5 . Singulating device according to claim 3 , wherein the drive shaft extends through the central portion, and wherein a ventilation gap for ventilation of a low-pressure side of the singulating part lies between the drive shaft and an inner surface of the central portion.
6 . Singulating device according to claim 5 , further comprising a transmission device, wherein the motor is connected to the drive shaft via the transmission device.
7 . Singulating device according to claim 5 , further comprising a guide, which is arranged between the drive shaft and the central portion, such that said ventilation gap for ventilation of a low-pressure side of the singulating part lies between the guide and the inner surface of the central portion.
8 . Singulating device according to claim 1 , wherein the driver arrangement comprises an auxiliary frame which can form-fittingly engage with the singulating part for torque transmission.
9 . Singulating device according to claim 1 , wherein the driver arrangement is integrated with the closure part.
10 . Singulating device according to claim 9 , wherein the driver arrangement is formed by the closure part.
11 . Singulating device according to claim 1 , wherein the closure part has an axial edge portion which is configured for engagement, especially form-fit engagement, with an edge portion of the singulating part.
12 . Singulating device according to claim 1 , wherein the singulating part has a radially outer edge portion which is configured for engagement, especially form-fit engagement, with an edge portion of the closure part.
13 . Singulating device according to claim 1 , wherein a distal end of the motor shaft has a coupling device for torque-transmitting coupling to a corresponding coupling device of the driver arrangement.
14 . Singulating device according to claim 1 , further comprising an arm, wherein the closure part is idly rotatably supported relative to the arm, and wherein the arm can be pivotably fastened radially outside the singulating part.
15 . Singulating device according to claim 1 , further comprising a cover which is attachable to the base part such that the base part and the cover enclose a singulating space in which the closure part and the singulating part are rotatable, and in which, when said pressure difference between opposite sides of the singulating part is obtained, a higher pressure is present in the singulating space than in a space that is defined by the closure part and the singulating part.
16 . Agricultural implement, especially a seed drill, for distributing granular material to ground over which the agricultural implement travels, comprising a plurality of material outlets, wherein at least some of the material outlets are associated with a singulating device according to claim 1 , which is configured to supply the material outlet with singulated seed.
17 . Method of distributing granular material to ground from an agricultural implement which comprises one or more singulating devices, each of them comprising:
a base part,
a singulating part, which is rotatable relative to the base part and which has a plurality of through-holes for receiving individual granules from said granular material with the aid of a pressure difference between opposite sides of the singulating part,
a closure part which is rotatable relative to the base part and which is attachable to the singulating part, such that the closure part is rotatable together with the singulating part, and
a motor for driving the closure part and the singulating part,
wherein the method comprises:
causing the driver arrangement to rotate with the aid of the motor, and
transmitting rotation from the driver arrangement to the singulating part,
wherein the singulating part is idly rotatably supported on the base part when the closure part is disengaged from the singularing part.
18 . Method according to claim 17 , wherein the rotation is transmitted with the aid of the closure part, which is form-fittingly connected to the motor and to the singulating part.
19 . Method according to claim 18 , wherein the rotation is transmitted by engagement between an axial edge portion of the closure part and a radial edge portion of the singulating part.
20 . Method according to claim 17 , wherein the rotation is transmitted with the aid of an auxiliary frame which is form-fittingly connected to the motor and to the singulating part.