Disc for agricultural machine

FIELD: agriculture.

SUBSTANCE: invention relates to the field of agricultural engineering, in particular to the disc tillage working elements. The annular tillage part of the disc is located outside the specified central diameter (D). The central dish-shaped part of the disc is located within the specified diameter (d) and has an inner side for receiving the hub. The annular connecting part of the disc has holes for mounting bolts. The connecting part has a shape of a truncated cone. The line passing along the plane of each hole for the mounting bolt on the inner side forms an angle α equal to 5°-10°, with a plane perpendicular to the centre line of the disc. The transitional areas between the tillage part and the annular connecting part and between the annular connecting part and the central dish-shaped part form obtuse outer angles.

EFFECT: constructive solution enables to improve the strength of the disc.

9 cl, 8 dwg

 

The invention relates to a drive for an agricultural machine, made according to the restrictive part of claim 1 of the claims.

Background of invention

The use of disks of different types of agricultural machines has long been known for tillage desirable discs often set at some angle. Often the weak point are the bearings, because they are experiencing a lot of stress. It is often difficult to make a sufficiently durable and wear-resistant bearing, which remains quite compact. Often the constructive height of the bearing, if you look at it in the direction of its Central axis, is too great. In addition, in practice it is difficult to produce a disc with a hub or sleeve with a small axial structural height. Therefore, the attainment of the desired axial size is a problem. Obviously, it is easier to make a sufficiently strong bearing, if you can increase its length or height. In addition, the disks are subjected to heavy wear, and therefore they are usually made from high quality steel, which is subjected to quenching and tempering to achieve the best balance between toughness and strength. As needed, the farmer replaces the disks. This change often occurs in unsuitable conditions. When continuous is yunam production assembles a large number of disks, and it is desirable that the Assembly was automated. Since the drives are usually connected with the flat side of the bearing, the natural orientation of the disc when the Assembly is missing, which may complicate the Assembly in the field and in industry. Examples of known interfaces are presented in US-A-2746371 and W02/19791.

The purpose of the invention

The aim of the invention is to provide a drive for an agricultural machine, which solved the above problems and which also has an optimal device and user friendly. In addition, it must be reliable, inexpensive and easy to use.

The invention

This goal is achieved by creating a disk corresponding to the characterizing part of claim 1 of the claims.

Preferred embodiments of the invention are described in dependent claims.

The boundary between the disk having a truncated-conical annular portion, and the corresponding hub or sleeve creates a natural orientation and provides some contour fixation of the disk due to the shape. This boundary provides a number of advantages.

Due to the fact that the bearing has a conical surface connection, it is possible to reduce the so-called constructive height corresponding to the dimension a in Fig. 5, i.e. the distance between the inner edge of the lever drive and place of contact between the hub flange and far, in the radial direction, the edge of the disc. In practical terms, this distance can be considered as structural height. This dimension is critical in some designs, for example in some ordinary drills. In addition, for a bolted connection is preferable that the Central axis of the bolts were held essentially parallel to the Central axis of the hub, as it provides benefits in respect of other equipment in manual or automated production.

The advantage is that as a result of this simplified replacement disk, which is important for the user. Due to the fact that the head of the bolt disc has a lower part in the shape of a truncated cone, when the Assembly is secured orientation, because the bolts are always screwed parallel to the Central axis of the hub as in automated Assembly and in the field, when worn discs replaced manually. In addition, in this design due to the shape of the disk is a certain fixation relative to the hub, which is necessary because the bolts are subjected to heavy load while working in the field, where the soil is very hard and sometimes contain rocks. This is caused by form fixation in combination with the design of the bolts reduces the load on the bolts and allow yet to use three mounting bolts instead of the usual four or five. Naturally, the presence of three mounting bolts is more preferable as when replacing a drive in the field and in the Assembly in the production process.

Description of the drawings

Below the invention is described in more detail with reference to accompanying drawings showing the preferred options for its implementation.

In Fig. 1 shows a side view of an agricultural machine equipped with tillage discs made according to the invention.

In Fig. 2 shows a perspective view of the transverse beam agricultural machine, depicted in figure 1, with a number of collected disk nodes containing the disk according to the invention.

In Fig. 3 shows a perspective view of mostly flat disc according to the invention, mounted on a carrying arm mounted on the beam.

In Fig. 4 shows a perspective view of the disk shown in Fig. 2, on the other hand.

In Fig. 5 shows a partial section of the hub part of the rotor lever and part of the drive.

In Fig. 6 shows a partial section of the drive shown in Fig. 4, a perspective view,

In Fig. 7 shows a side view of a disk according to the invention.

In Fig. 8 shows a section of the disk shown in Fig. 4.

In Fig. 1 shows an agricultural machine 1, which can pull tractor (not shown). Instead of the tractor, agricultural machine 1 can be moved forward other known what s means. The agricultural machine 1 in this case is an ordinary drill and contains wheel group 2, 3, 4, at least two groups tillage machinery in the form of two front rows of disk nodes 5 with a freely rotating disks for tillage, as well as the introduction of straw, and two rear rows of disk nodes with 6 rotating disks to create furrows for seeds, and the harrow 7 on the rear. Both groups of disk nodes 5, 6 can contain a freely rotating disks 8, made according to the invention. The disks in the ranks of the disk nodes 5 or 6 can have a different design. An ordinary planter shown in Fig. 1 presented only as an example and does not limit the scope of the disks 8, made according to the invention. On the frame 10 of the agricultural machine 1 has a hopper 9 for seed and/or fertilizer. Through the dispensing and transporting (not shown) seeds and/or fertilizer are to follow the dosing in the VAS deferens 11 on the disk 8 (see Fig. 2). In order not to complicate the drawing, Fig. 1 flexible hoses for the transport of seeds from the hopper 9 to the VAS deferens 11 are not shown and only the designated position 12. Wheel unit 4, located behind the disk nodes 5 and 6, has mounted in bearings freely rotating wheels 4A, which close the furrow formed the data disk 8, after delivery of seeds in the soil and then compacted soil. Wheels 4A in the wheel nodes 4 are also used as transport wheels for moving agricultural machine 1 between the fields where you want to work the soil and make the North.

In Fig. 2-8 in the example shown the preferred embodiment of one of the disk nodes 6, depicted in figure 1 and intended to create furrows for seeds. Each disk node 6 is made according to the invention the disk 8 mounted with free rotation on the sleeve or the hub 13, which, in turn, mounted on a carrying arm 14 disk node 6. Fastener 15 is fixed, preferably by welding, on semiprivate 11 and screwed the two mounting bolts 16 to the hub 13 on the side of the supporting arm 14 opposite to the disk. The bolts 16 are inserted through the holes drilled in the mounting part 15, and a carrying arm 14, and attach these items to the hub 13. The upper part of each support arm 14 is attached, naprimerparu, to the lower part 17 of the housing 18 of the bearing. The upper part 19 of each body 18 of the bearing is attached by bolts 18a to the lower part 17. In the space between the parts 17, 19 of the bearing housing, having an essentially square cross section, each corner has an elastic pliable rod 2. As a result, the housing 18 of the bearing in each disk node 5, 6 disc is fixed, by providing some flexibility, on the beams 21, having an essentially square cross-section and positioned across the entire agricultural machine 1.

The disk nodes 5 and 6 disks 8 are installed along the transverse beams 21 at a specified distance from each other. Curved beam 22 with one end attached to the respective supporting arm 14, allowing you to regulate the depth of sowing or cutting depth of the soil disks 8.

Each disk 8 attached Rethimno corresponding to the hub 13 by four bolts 23, preferably distributed uniformly around the circumference, located at a specified distance from the center of the disc. Each hub 13 has a through Central opening 24, which is mounted in the bearings of the axis of rotation, screwed in the field 26 to the lower end of the supporting arm 14 (see Fig. 5 and 6).

Thus, the disk 8 is fixed on the hub 13 Rethimno by means of bolts 23, screwed into the threaded holes 27 in the outer annular flange 28 of each of the hub 13. In the Central threaded hole 30 made in the hub 13 on its side facing the disk 8, the threaded bolt 29. Between the head 31 of the bolt 29 and facing the disk 8 side of the hub 13 mounted spring washer 32 (next to the hub 13 and contribu 33. When tightening the AI bolt 29 its head 31 pushes against the washer 32, 33 which clamp half 34 of the bearing 35 with the balls 36. The other half of the bearing includes a shaped portion 37 of the center hole 24 of the hub 13. When tightening the bolt 29 is pocomania bearing 35. In the Central hole 24 on the side facing the lever 14 has a sealing ring 38 to prevent the ingress into the bearing 35 soil and other contaminants. For the same reason, the bearing 35 secured on the other, facing the disk 8, the side sealing cap 39 has an annular flange 40 with the sleeve 41, which snaps around the annular ribs 42 on the hub 3.

The disc 8 has a Central, generally dish-shaped portion 43, which in Fig. 8 is determined by the diameter d. Between the dish-shaped part 43 and the outer cutting edge part 44 of the disk 8 is annular part 45 having the shape of a truncated cone and located, as seen in Fig, between the diameter D and diameter d. The holes 46 of the ring portion 45 located around the circumference, preferably at equal intervals, are intended for insertion of the bolts 23 in the Assembly. An annular, generally truncated-conical part 45 has a mantle surface, which is in one of the embodiments of the invention is flat, but in another embodiment, this surface may be curved and convex side facing toward the Central axis or int is nna side of the disc 8, intended for reception of the hub, i.e. to the left and down on Fig. In this embodiment of the invention in a circular truncated-conical portion 45 of the disc 8 made four holes 46. Circular truncated-conical portion 45 of the disc 8 in the area of the holes 46 or, more precisely, the line passing through the plane of the hole of each mounting bolt on the inside, the receiving hub side of the disc 8, is inclined inward at an angle α to the plane perpendicular to the Central line of the disk 8. The annular portion 45 is inclined inward at an angle α so that its inner mantle surface adjacent to executed it the hub 13. Outer relatively flat end surface 47 of the disc portion 43 forms an angle β relative to the mantle surface of the circular truncated-conical part 45. This form solid turns from the point of view of durability, the disk 8, in which the sloping area with different radii, overlapping, have transitions under the relevant angles, resulting in the risk of rupture disk 8 is minimized. Used here, the term "inclined" refers to the slope of the line passing through the plane of the hole in each bolt hole of the disk 8. Side of the flange 28 of the hub facing the disk 8, corresponds to the form of a circular truncated-conical portion 45 of the disc and that is they way prisposobena for receiving the edge of the disk. To prevent the possibility of fault transitions between tillage part 44 of the disk and its connecting part 45, and between the connecting part 45 and the Central disc part 43 is made without edges, i.e. curved on the radius.

As clearly seen in Fig. 5 and 8, the screw holes 27 are essentially parallel to the Central axis 50 and are located in the middle before the corresponding holes 46 in the disk 8. Each hole 46 in the disk 8 has a countersunk portion 46a and a mainly cylindrical part 46b, with the shape of a circular cylinder. According to the invention, the plane in which the transition between the parts 46a and 46b holes 46 lies between the side surfaces of the disk 8, i.e. the part of the plane, which is located within the boundaries of the holes included in the material of the disk 8. When this transition region, i.e. the boundary between the parts 46a and 46b holes 46, lies within the periphery of the disc, near the hole does not occur faults. In addition, you can create sharp corners, and to create smooth transitions between the Central disc part 43 and the middle annular part 45, and between the middle annular part 45 and the outer part 44 of the disk 8. It was found that to achieve this, a suitable value of the angle α is 5°-10°, preferably 6°-8°, and more preferably 7°. Also what was expedient, to the angle β was equal to 130°-140°, preferably 132°-135°, and more preferably 133°. Because of this transitional area between tillage part 44 and the connecting part 45 of the disk, and between the connecting part 45 and the Central disc part 43 have a blunt outer corners.

The outer annular surface 48 of the flange 28 of the hub 13 on the side facing the disk 8, corresponds to the shape of the annular portion 45 of the disc 8, so that its radial continuation corresponds to a radial continuation of the annular part 45 and preferably comes to the outside when viewed in the radial direction, the periphery of the annular part 45, which allows to connect the disk 8 with a hub 13 having a corresponding shape.

In Fig. 6 shows a partial section of the hub 13 is installed on the disk 8. It is seen that the inner part of the disc 43 closes the sealing cap 39 and the bolts 23 in the annular portion 45 of the disc 8 are uniformly distributed around the circumference of the disc around the inner part 43.

The shape of the disc 8 in the outer ring portion 44 does not affect the shape of its Central parts 43 and 45 and may be flat, conical or another. Provided with notches edge 49 of the disk 8, as shown in the drawings, also does not limit the invention, and may have another shape, for example, may be equal.

It should be noted that the disk 8 for all the horses has a generally uniform thickness. At selected angles in the transition areas between the parts 43, 44 and 44 of the disc 8 there is no need to increase any of them by increasing its thickness. The holes 46 in the disk are made so that their shape and dimensions correspond to the tapered portion of the bolt 23 between the head and threaded rod. Due to the fact that the truncated-conical portion 44 of the disk 8 is located at an angle α, each hole 46 is slightly asymmetrical when viewed from the side of the disk facing the hub 13, so that outside in the countersunk portion 46a of the holes 46 can be seen more material on the side facing the center line 50. This is well illustrated in Fig. 7 and 8.

The invention allows various modifications within its formula, for example, as indicated in the introductory part, in the hub 13 and the disk 8 can be executed a different number of holes 27, 46, with the preferred number of holes 46 in the disk 8 is set to three and, respectively, in the flange 28 of the hub 13 has three threaded holes 27 under the bolts 23. Regardless of their number, these holes should be distributed evenly around the circumference.

1. Drive (8) for agricultural machine (1), contains ring-tillage portion (44)that is located outside of the specified Central diameter (D), the Central dish-shaped portion (43)located within a given Central is about the diameter (d) and having an inner side for receiving the hub, and located between the parts of the annular connecting part (45) with holes (46) for mounting bolts, intended to receive fixing bolts (23) parallel to the Central line (50) of the disk, characterized in that the connecting part (45) has the form of a truncated cone, and the line passing through the plane of the hole in each bolt hole on the specified inner side, forming an angle (α)equal to 5°-10°, with the plane perpendicular to the Central line (50) of the disk, and transition areas between tillage part (44) and the annular connecting part (45), and between the annular connecting part (45) and the Central disc part (43) form a blunt outer corners.

2. Disc (8) according to claim 1, characterized in that the angle (α) equal to 6°-8°, preferably 7°.

3. Disc (8) according to claim 1 or 2, characterized in that each hole (46) for mounting bolts in the connecting part (45) of the disc (8) has a countersunk portion (46a) and a portion (46b) mainly in the form of a circular cylinder.

4. Disc (8) according to claim 1 or 2, characterized in that the specified line passing through the plane of the holes on the inner side of the disc, forms a complementary angle (β)equal to 130°-140°, with a predominantly flat end section (47) of the dish-shaped part (43).

5. Disc (8) according to claim 4, characterized in that the more the positive angle (β) is equal to 132°-135°, preferably 133°.

6. Disc (8) according to claim 1 or 2, characterized in that the transition region between tillage part (44) and connecting part (45), as well as the transition region between the connecting part (45) and dish-shaped part (43) is curved and have a radius.

7. Disc (8) according to claim 1 or 2, characterized in that it has a uniform thickness throughout its area.

8. The disk node (5, 6) disks containing the lever (6) for a tool with wheel hub (13), made with the possibility of installation of the disc (8) according to any one of claims 1 to 7 and having a shape corresponding to the shape of the specified disk.

9. Agricultural machine (1) with the disk nodes (5, 6), each of which contains a lever (6) for a tool with wheel hub (13), made with the possibility of installation of the disc (8) according to any one of claims 1 to 7 and having a shape corresponding to the shape of the specified disk.



 

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