PLANTING UNIT Russian patent published in 2015 - IPC A01C7/12 

FIELD: agriculture.

SUBSTANCE: planting unit comprises a housing, a coil in the form of a cylinder with grooves on its surface, and the valve. The coil is made with increased volume of grooves, of wear resistant plastic with antifriction properties. On the valve the bottom is rigidly mounted by means of supports, made in the form of a part of the lateral surface of the cylinder with the front and rear edges and a symmetry axis coinciding with the axis of symmetry of the coil. The bottom has the polished inner surface with the radius greater than the radius of the coil. The front edge of the bottom is inclined along the path of rotation of the coil by the angle of 40-45 degrees down from the horizontal plane of symmetry of the coil and located in the third quadrant parallel to the symmetry axis of the coil. The rear edge of the bottom which is provided with a bevel for throwing seeds, is located in the fourth quadrant and is inclined along the path of rotation of the coil by the angle of 54-58 degrees to the right from the vertical plane of symmetry of the coil. In the housing of the planting unit the shaper-guide is rigidly mounted adjacently to the front edge of the bottom, made in the form of a part of the lateral surface of the cylinder with the axis of symmetry coinciding with the axis of symmetry of the coil. The shaper-guide has a polished inner surface with the radius equal to the radius of the inner polished surface of the bottom. Free upper part of the shaper-guide which is located in the second quadrant parallel to the axis of symmetry of the coil, is inclined along the path of rotation of the coil by the angle of 47-53 degrees to the left from the vertical plane of symmetry of the coil, and a brush is attached to it. The shag of the brush is located on a circle with a radius less than the radius of the coil. The gaps between the coil, the bottom and the shaper-guide are equal to and less than the average minimal thickness of the seeds.

EFFECT: invention enables to provide improvement of uniformity of distribution of seeds, and yield.

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