RU1822635C - Pneumatic sowing apparatus - Google Patents

Abstract

PNEUMATIC SOWING UNIT

The use in agricultural engineering, in particular in sowing machines, of the precision sowing of seeds of row crops. The apparatus includes a housing with a seed chamber 2, a cover 3 with a vacuum chamber 4, a seed disk 6 with suction holes 7, and an ejector 6 seeds. The latter is made in the form of an elastically elastic ring, the diameter of which is equal to the diameter of the circumference of the centers of the suction holes, and the roller 12 mounted on the axis 13 of the fork 14, the fork is located together with the spring 15 and the washer is mounted on it. Each suction port is provided with a reverse chamfer 18. 4 ill. be u 00 yu about SA SL

Description

Figure 1

The invention relates to agricultural machinery, in particular to sowing machines for precision sowing of seeds of row crops.

The aim of the invention is to increase the reliability and quality of sowing.

Figure 1 shows a pneumatic sowing apparatus, General view; figure 2 is a section aa in figure 1; in Fig.Z - section bB in Fig.1; in FIG. 4 - sowing disk with an elastic-elastic ejector installed in its groove and a section along BB.

The pneumatic metering device includes a housing 1 with a seed chamber 2, a cover 3 with a vacuum chamber 4, a hopper 5, a metering disk 6 with suction holes 7 and an elastic-elastic ejector 8 in the form of a ring located together with a agitator 9 on a horizontal shaft 10. B seeds 11 are located in the hopper 5 and the seed chamber 2. A roller 12 mounted on the axis 13 of the fork 14, which, together with the spring 15, is located in the cavity 16 of the cover 3 (Fig. 2) abuts the elastic-elastic ejector 8. A washer 17 is mounted on the yoke 14, against which the spring 15 abuts (Fig. 3). Each suction hole is provided with a reverse chamfer 18, and an annular groove 19 is made on the back of the sowing disk, in which an elastic-elastic ejector 8 is located, the diameter of which is equal to the diameter of the circumference of the center of the suction holes.

The metering device operates as follows.

Seeds 11 (FIG. 1 and FIG. 2) enter the seed chamber 2 of the housing 1 from the hopper 5, where they are entrained in the rotary motion of the agitator 9 and, due to the vacuum created in the vacuum chamber 4, are sucked to the holes 7 of the seed disk 6. Rotation When mounted together with the shaft 10, the disk 6 conveys the seeds 11 to the rarefaction zone. There, the seeds are separated from the holes 7 and fall into the openings open by the coulter. After this, clogged inlet openings are cleaned of litter in the lower part of the metering unit. The cleaning process is as follows. When aligning the suction hole 7 with the roller 12, it, under the action of the spring 15, enters the back facet 18 of the hole 7 and stretches the part of the elastic-elastic ejector that is under it, which enters the suction

hole and pushes rubbish, stuck in it. After coming out of contact with the roller 12, the elongated part of the ejector is compressed and takes its initial position on the axial line of the groove 19. In this position, as well as due to the fact that the diameter of the ejector’s cross section is less than the diameter of the suction hole, it completely prevents suction seed to holes m.

Due to the fact that the roller 12 rotates on the axis 13 and the force required to push the ejector into the suction holes, the wear of the surface of the elastic-elastic ejector slightly

due to friction, it runs slowly on the surface of the roller, which significantly lengthens its service life, increases the reliability and quality of the sowing apparatus.

Claims (1)

The claims A pneumatic metering apparatus comprising a housing with a vacuum chamber, a metering disc with suction holes, a tedder, a drive shaft and a spring-loaded ejector located in an annular groove made in the disk body from the side of the vacuum chamber, characterized in that, in order to increase the reliability and quality of sowing, the ejector is made in the form of an elastic ring located in the groove, the diameter of which is equal to the diameter of the circumference of the location of the centers of the suction holes, and installed in the seeding zone a roller for periodic interaction with the ring, with each suction opening having a chamfer on the side of the vacuum chamber. 7 6 Fig. / 55 scan 3 17 FIG. J /AND AT in 8 FIG. 4