RU172764U1 - ROTARY CULTIVATOR - Google Patents

Abstract

The utility model relates to agricultural machinery, in particular to rotary implements for tillage. A rotary cultivator consists of a frame and racks mounted on it with the possibility of changing its position in height. It also includes a pair of flat disks fixed to the uprights by means of hubs, which are equipped with blades and are inclined to each other in horizontal and vertical planes. Moreover, each flat disk on the periphery is bent at a given angle and on the bent area around the circumference are fixed blades in the form of a knife. In this case, the cutting edge of each blade has a contour formed by a section of a logarithmic spiral, the convexity of which is turned towards the direction of movement and is made toothed along the contour. Also, the front edge of each tooth has the shape of a half parabola, the branch of which is directed from the center of the bent flat disk, and the apex and its convexity are in the direction of movement and are made from the toe to the heel of the tooth along the parabola section. 4 ill.

Description

The utility model relates to agricultural machinery, in particular to rotary implements for tillage.

Known rotary implements for surface tillage, containing batteries of disk working bodies, consisting of separate sections, including two disks mounted on a curved axis with the possibility of free rotation. In this case, the rotation planes of these two disks form an angle α between themselves. The curved axes of the sections are connected to each other motionlessly and form a solid battery, with the bending lines of the curved axes of each section lying in the same plane, deviated from the vertical towards the translational movement of the gun by an angle ϕ, which ensures a minimum distance between the disks at the level of the field surface in the exit zone them from the soil [1].

The disadvantage of this tool is that it performs only surface tillage, poorly copies the surface of the field and is not able to perform deeper tillage.

A disk cultivator is also known, including a frame with uprights and a pair of flat discs fixed to the uprights by means of hubs inclined to each other in horizontal and vertical planes having a greater distance between the upper front cutting edges than between the lower rear [2].

The disadvantages of the disk cultivator are that for deepening the disks requires a significant vertical load, which leads to uneven tillage in depth. In addition, high-quality crumbling of the soil is not always ensured due to slippage of disks and insufficient engagement of the formation located in the interdisk space.

The prototype is a rotary cultivator, including a frame, racks mounted on it and a pair of flat discs inclined to each other in horizontal and vertical planes, having a greater distance between the upper front cutting edges than between the lower rear and fixed to the racks by means of hubs, and the racks are equipped hydraulic vibrators that ensure their vibration in the axial direction, and the flat discs are equipped with blades having the shape of a rectangular trapezoid and located radially around the circumference of their cutting second edge, and the blade fixedly attached to the disks with the inner side of the trapezoid larger base and smaller base length is equal to the maximum depth of the soil processing [3].

The disadvantages of this invention are the low quality of the soil and the significant energy consumption of the process of loosening due to the presence of a blade having the shape of a rectangular trapezoid, which leads to rapid wear and breakage of blades of this shape.

The objective of the utility model is to eliminate these drawbacks.

The technical result is a reduction in energy intensity of tillage, ensuring a stable depth of cultivation and an increase in the degree of crumbling.

The specified technical result is achieved by the fact that in a rotary cultivator, including a frame, racks mounted on it with the possibility of changing their position in height, fixed to the racks by means of hubs, equipped with vanes and tilted to each other in horizontal and vertical planes, a pair of flat disks, each flat the disk is bent around the periphery by a predetermined angle and on the bent area around the circumference are fixed blades in the form of a knife, while the cutting edge of each blade has a contour formed by a a spiral, the convexity of which is directed to the direction of movement and is serrated along the contour, with the front edge of each tooth having the shape of a half parabola, the branch of which is facing away from the center of the bent flat disk, and the apex and its convexity are facing the direction of movement.

The rotary cultivator is illustrated by the schemes:

FIG. 1. - scheme of a rotary cultivator, front view;

FIG. 2. - scheme of a rotary cultivator, top view;

FIG. 3. - scheme for constructing the contour of the cutting edge of the blade;

FIG. 4. - diagram of the construction of the leading edge of the tooth of the scapula.

The rotary cultivator (Fig. 1 and 2) consists of a frame 1, and mounted on it with the ability to change its position in height of the uprights 2. It also includes a pair of flat discs 3, fixed to the uprights by means of hubs 4, which are equipped with blades 5 and tilted to each other to a friend in horizontal and vertical planes. Moreover, each flat disk 3 on the periphery is bent at a given angle and on the bent area 6 around the circumference are fixed blades 5 in the form of a knife. At the same time, the cutting edge of each blade has a contour 7 (Fig. 3), formed by a section of a logarithmic spiral, the convexity of which is turned in the direction of movement and along the contour 7 is made gear. Also, the front edge 8 of each tooth 9 has the shape of a half parabola, the branch of which is directed from the center of the bent flat disk 3, and the apex and its convexity are in the direction of movement and are made from the toe K to the heel M of tooth 9 along the parabola section (Fig. 4) .

A rotary cultivator operates as follows.

When the gun passes through the field, pre-treated with disk or paw working bodies, discs 3 cut the surface layer and are buried in the soil to a predetermined depth a . In the process of movement, due to friction, the disks 3 rotate in the direction of translational movement of the unit. Moreover, due to the execution of the contour 7 of the cutting edge passing along the ends of the teeth 9 of the blade 5, along a section of a logarithmic spiral whose polar axis is at the intersection of the circle lines of the disk 3 and the longitudinal axis of the blade 5, the soil and weeds are trimmed in a vertical plane with sliding and minimum energy consumption of the cutting process. Under the action of the teeth 9 of the blade 5, the leading edge 8 of which has the shape of a half parabola, the branch of which is facing away from the center of the bent flat disk 3, and the apex and its convexity are in the direction of movement, the soil lumps are destroyed, and the soil and weeds are cut at an angle slip. Next, the cropped soil layer, rising along the working surface, enters the bent part 6 of the disk 3, where intensive crumbling of the soil occurs without increasing the traction resistance of the working body 3. In addition, the implementation of the toothed cutting edge of the blade 5 in the above form provides sliding cutting and deformation of the soil with the least resistance and helps to control the trajectory of the soil bed, which reduces its rejection to the side.

Thus, such a design of the rotary cultivator provides a steady penetration of disk working bodies into the soil and an increase in the degree of crumbling of the treated formation with minimal energy consumption.

List of used literature.

1. RF patent №2520124, IPC АВВ 21/08; 23/00; 35/28. Rotary implements for surface tillage / A.R. Valiev, B.G. Ziganshin, R.V. Minikaev et al. 11/26/2012, publ. 06/20/2014, bull. Number 17.

2. Panov I.M. Physical foundations of soil mechanics / I.M. Panov, V.I. Vetohin. - K .: Phoenix, 2008 .-- S. 36-38.

3. RF patent No. 2552364, IPC АВВ 35/28. Rotary cultivator / A.R. Valiev, N.K. Mazitov, B.G. Ziganshin, R.V. Minikaev et al. 02/03/2014, publ. 06/10/2015, bull. No. 16.

Claims (1)

A rotary cultivator, including a frame mounted on it with the possibility of changing its position along the height of the rack, fixed to the racks by means of hubs, equipped with blades and inclined to each other in the horizontal and vertical planes of a pair of flat discs, characterized in that each flat disc is bent around the periphery blades in the form of a knife are fixed at a given angle and on a bent area around the circumference, while the cutting edge of each blade has a contour formed by a section of a logarithmic spiral, convexity which faces the direction of movement and is serrated along the contour, with the front edge of each tooth having the shape of a half parabola, the branch of which is facing away from the center of the bent flat disk, and the apex and its convexity are facing the direction of movement.

Images