Spreading roller of seedling tray seeder

Abstract

The utility model discloses a sowing roller of a seedling tray sowing machine, which relates to the technical field of sowing machines and comprises a roller body and a groove on the surface of the roller body, the groove in the radial section of the roller body is in the shape of a smooth curve, and the opening length of the groove is larger than the length of one seed and smaller than the sum of the lengths of two seeds. The groove depth of the groove is larger than the width of one seed and smaller than the length of the opening, the curve comprises a third arc section, a second arc section and a first arc section which are sequentially and smoothly connected in the rotating direction of the cylinder, the circle where the first arc section is located is externally tangent to the circle where the second arc section is located, and the circle where the second arc section is located is internally tangent to the circle where the third arc section is located. The radius of the third arc is smaller than that of the first arc, and the length of the second arc section is larger than that of the first arc section and smaller than that of the third arc section. According to the sowing roller of the seedling tray sowing machine adopting the structure, seeds can enter grooves conveniently, and the seeds are effectively prevented from being clamped on the inner walls of the grooves.

Description

TECHNICAL FIELD

[0001] The utility model relates to seeding machine technical field especially is involved in a kind of seedling tray seeding machine sowing roller. BACKGROUND

[0002] The seedling tray seeding machine sowing roller is used to scatter the seed in the groove to the seedling tray, and the distance between the seeds is adjusted by the moving speed of the seedling tray. The seeds in the groove need to be flattened by the flattening device before sowing to ensure the sowing accuracy. The groove of the seedling tray seeding machine sowing roller for sowing rice seeds in the prior art is usually semicircular. During the process of the seed falling into the groove, some larger seeds are difficult to enter the groove, which affects the accuracy of the number of seeds entering the groove. During the flattening process, the larger seeds may also be stuck on the inner wall of the groove, which affects the removal of the seeds from the groove. The above problems may cause uneven sowing of seeds, affect the sowing accuracy, and in addition, the sowing efficiency is affected after the seeds are stuck on the inner wall of the groove.

[0003] To solve the above problems, a new seedling tray seeding machine sowing roller is needed. SUMMARY

[0004] The utility model discloses a seedling tray seeding machine sowing roller, which is beneficial to the entry of seeds into the groove, effectively avoids the sticking of seeds on the inner wall of the groove, and thus ensures the sowing accuracy and sowing efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides a seedling tray seeding machine sowing roller, which comprises a cylinder body, the surface of the cylinder body is provided with grooves uniformly distributed along the circumferential direction thereof, the shape of the groove in the radial section of the cylinder body is a smooth curve concave towards the axis direction of the cylinder body, the distance between the two end points of the curve is the opening length of the groove, the opening length is greater than the length of one seed and less than the total length of two seeds, the groove depth is greater than the width of one seed and less than the opening length, the curve comprises a third circular arc segment, a second circular arc segment and a first circular arc segment connected smoothly in sequence along the rotation direction of the cylinder body, the circle where the first circular arc segment is located is circumscribed to the circle where the second circular arc segment is located, the circle where the second circular arc segment is located is inscribed to the circle where the third circular arc segment is located, and the radius of the third circular arc is less than the radius of the first circular arc, the length of the second circular arc segment is greater than the length of the first circular arc segment and less than the length of the third circular arc segment.

[0006] Preferably, the radius of the first circular arc segment is 16 mm, the radius of the second circular arc segment is 3.8 mm, the radius of the third circular arc segment is 7 mm, the opening length is 9.9 mm, and the groove depth is 4.5 mm.

[0007] Preferably, the distance between two adjacent grooves is 1.5mm.

[0008] Preferably, the number of the grooves is 58.

[0009] Preferably, each of the grooves is parallel to the generatrix of the cylinder.

[0010] Therefore, the seedling tray seeder spreading roller with the above structure has the following beneficial effects:

[0011] 1. Compared with the semicircular groove in the prior art, the groove in the utility model increases the opening length and the groove depth ratio, thereby facilitating the seed to enter the groove.

[0012] 2. The first arc and the second arc can quickly increase the groove depth, and the third arc can make the groove outlet more gentle, so that the seed in the groove can be supported by the first arc and the second arc, and the seed is prevented from falling prematurely before the groove is turned to the bottom end of the roller, thereby affecting the seeding accuracy.

[0013] 3. The combination of the first arc, the second arc segment and the third arc segment can avoid the occurrence of the seed clamping point, and is beneficial to the seed moving out.

[0014] The technical scheme of the utility model will be further described in detail below by means of the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a structure schematic view of the embodiment of the utility model a seedling tray seeder spreading roller.

[0016] Fig. 2 It is a sectional view of the embodiment of the utility model a seedling tray seeder spreading roller.

[0017] REFERENCE NUMERALS

[0018] 1. Cylinder; 2. Groove; 21. Third arc segment; 22. Second arc segment; 23. First arc segment. DETAILED DESCRIPTION

[0019] The technical scheme of the utility model will be further described in detail below by means of the drawings and examples.

[0020] EMBODIMENT

[0021] As Figs. 1-2As shown, a seedling tray seeder spreading roller includes a cylinder 1, the surface of the cylinder 1 is provided with grooves 2 uniformly distributed along the circumferential direction thereof, each groove 2 is parallel to the generatrix of the cylinder 1. The shape of the groove 2 in the radial cross section of the cylinder 1, that is, the cross section perpendicular to the direction of the roller axis, is a smooth curve concave toward the axis direction of the cylinder 1, the distance between the two end points of the curve is the opening length of the groove 2. The opening length is greater than the length of one seed and less than the sum of the lengths of two seeds, the groove depth of the groove 2 is greater than the width of one seed and less than the opening length, compared with the semicircular groove 2 in the prior art, the opening length and the groove depth ratio are increased, thereby facilitating the seed to enter the groove 2. The curve includes a third circular arc segment 21, a second circular arc segment 22 and a first circular arc segment 23 which are smoothly connected in turn in the rotation direction of the cylinder 1, the circle where the first circular arc segment 23 is located is circumscribed to the circle where the second circular arc segment 22 is located, and the circle where the second circular arc segment 22 is located is inscribed to the circle where the third circular arc segment 21 is located, the tangential relationship can ensure the smoothness of the curve. The radius of the third circular arc is smaller than the radius of the first circular arc, and the length of the second circular arc segment 22 is greater than the length of the first circular arc segment 23 and less than the length of the third circular arc segment 21. The first circular arc and the second circular arc can quickly increase the groove depth of the groove 2, and the third circular arc can make the outlet of the groove 2 more gentle, so that the seed can be supported by the first circular arc and the second circular arc in the groove 2, thereby avoiding the seed from falling prematurely before the groove 2 is turned to the bottom end of the roller, affecting the uniformity of the seed on the seedling tray and the seeding accuracy. In addition, the combination of the first circular arc, the second circular arc segment 22 and the third circular arc segment 21 can avoid the occurrence of the seed clamping point, which is beneficial to the seed moving out.

[0022] In the embodiment, the radius of the first circular arc segment 23 is 16 mm, the radius of the second circular arc segment 22 is 3.8 mm, the radius of the third circular arc segment 21 is 7 mm, the opening length is 9.9 mm, and the groove depth is 4.5 mm, so that the shape of the groove 2 forms an approximate half water drop shape, thereby facilitating the seed to enter and move out of the groove 2, and effectively preventing the seed from being clamped on the inner wall of the groove 2. The spacing between adjacent two grooves 2 is 1.5 mm, and the number of the grooves 2 is 58. The size of the groove 2 in the embodiment is suitable for sowing rice seeds with a seed length of 6-8 mm and a seed diameter of 2.5-3.5 mm.

[0023] In use, the large opening length and groove depth ratio of the groove 2 are beneficial to the seed entering the groove 2, after the seed falls into the groove 2, the groove 2 slowly moves from the top end of the cylinder 1 to the bottom end of the cylinder 1 under the rotation of the cylinder 1, in the moving process, the first circular arc segment 23 and the second circular arc segment 22 support the seed to prevent the seed from falling, at the same time, the third circular arc segment 21 will not cause the seed to be clamped, thereby avoiding the influence of the production efficiency caused by the stop working and picking seeds, when the groove 2 moves to the bottom end of the cylinder 1, the seed can fall smoothly onto the seedling tray under the action of gravity, thereby avoiding the influence of the seeding accuracy caused by the missed sowing.

[0024] Therefore, the seedling tray seeder spreading roller with the above structure is beneficial to the seed entering the groove, effectively avoids the seed being stuck on the inner wall of the groove, and further guarantees the seeding precision and the seeding efficiency.

[0025] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the utility model and not to limit them, although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that: its still can modify or equivalent replace the technical solutions of the utility model, and these modifications or equivalent replacements also cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the utility model.

Claims

1. A seed tray planter broadcast drum, characterized by: The application relates to a seed sowing device, which comprises a cylinder (1), the surface of the cylinder (1) is provided with grooves (2) uniformly distributed along the circumferential direction of the cylinder (1), the shape of the groove (2) in the radial section of the cylinder (1) is a smooth curve which is concave towards the axis direction of the cylinder (1), the distance between two end points of the curve is the opening length of the groove (2), the opening length is greater than the length of one seed and less than the total length of two seeds, the groove depth of the groove (2) is greater than the width of one seed and less than the opening length, the curve comprises a third circular arc segment (21), a second circular arc segment (22) and a first circular arc segment (23) which are smoothly connected in sequence along the rotation direction of the cylinder (1), the circle where the first circular arc segment (23) is located is circumscribed to the circle where the second circular arc segment (22) is located, the circle where the second circular arc segment (22) is located is inscribed to the circle where the third circular arc segment (21) is located, the radius of the third circular arc is less than the radius of the first circular arc, and the length of the second circular arc segment (22) is greater than the length of the first circular arc segment (23) and less than the length of the third circular arc segment (21).

2. A seed metering roller for a seed metering device as claimed in claim 1, wherein: The radius of the first circular arc segment (23) is 16 mm, the radius of the second circular arc segment (22) is 3.8 mm, the radius of the third circular arc segment (21) is 7 mm, the opening length is 9.9 mm, and the groove depth is 4.5 mm.

3. A seed metering roller for a seed metering device as claimed in claim 2, wherein: The interval between two adjacent grooves (2) is 1.5 mm.

4. A seed metering roller for a seed metering device as claimed in claim 3, wherein: The number of the grooves (2) is 58.

5. A seed metering roller for a seed metering device as claimed in claim 1, wherein: Each groove (2) is parallel to the generatrix of the cylinder (1).

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