WO2014108909A1

WO2014108909A1 - A tractor drawn rotary plough

Info

Publication number: WO2014108909A1
Application number: PCT/IN2013/000364
Authority: WO
Inventors: Hasmukhbhai Gatorbhai GOHIL
Original assignee: Tirth Agro Technology Pvt. Ltd.
Priority date: 2013-01-09
Filing date: 2013-06-07
Publication date: 2014-07-17

Abstract

The present invention discloses a tractor drawn rotary plough (11) consists of a main transverse frame (1) at the front side for attaching three point linkage system of tractor; a pair of floating plates (5) each of which being mounted at each end of said transverse frame (1); a plurality of rotatably coupled rotor-blade assembly (15) being arranged horizontally throughout the width of said transverse frame (1) at the bottom of said transverse frame (1) to substantially till the soil; a transverse levelling bar (12) being secured at rear side of said frame (1) to level the dug soil; a roller assembly (9') being mounted at the rear side of said levelling bar (12) to break the soil clods that being left after tilling the soil; and a gearbox (3) having an input shaft, an output shaft, a bevel gear and a plurality of spur gear.

Description

A TRACTOR DRAWN ROTARY PLOUGH

Field of the invention The present invention relates to a rotary plough for physical manipulation of soil to convert barren land into cultivable land. More particularly relates to a tractor drawn rotary plough to prepare the soil for seeding operation. Back ground and prior art of the invention

The ideal soil is deep, friable, well-drained and has high organic matter content. Proper soil preparation provides the basis for good seed germination and subsequent growth of crops. Careful use of various soil implement can improve soil structure and provide the best possible starting ground for crops.

The type of equipment used to prepare soil-bed depends on the size of the farm, physical ability, time, and budget. Options include hand tilling with a spade or shovel, tilling with a power rotary tiller or ploughs such as Moldboard Plough (MB Plough) or disc plough and tilling with a rototilling. However, hand tilling or manual tilling requires a huge hard work and which is really a time consuming. Further, MB plough or disc plough are passive type of machines for the physical manipulation of the soil for seed-bed preparation which requires huge amount of draft for its operation. Also the clod sizes of the soil resulting from said MB plough or disc plough is bigger hence the secondary tillage implements such as disc harrow or cultivator are used for reducing the clod size of soil as well as seed-bed preparation. So, there is an increase in compaction of the soil beneath the soil surface which affects the upward movement of the nutrients necessary for the crop growth. As far as rototilling is concerned, it mixes with only the upper layer of soil rather than completely turning the soil over, hence the moisture content of soil retains as it is.

Various documents available in the prior art too regarding said MB plough or disc plough and rototillers. For example, WO 2008/071391 discloses a disc harrow comprising a frame and at least one disc which is fixed by means of a number of bolts to a hub in the frame. Each of the discs is usually fixed to a hub, which is rotably supported in the frame of the disc harrow. The discs are usually made of a material which is significantly harder than the material of which the bolts are made. As a result, there is a danger that the bolt shanks will be compressed under the influence of the load exerted on the bolts via the discs and that the discs will come loose and the bolts may shear off, with all its adverse consequences.

US 3,162,248 discloses a mold board type plough which comprises a mold board and a rotary soil crushing shaft having a number of cultivating blades arranged along thereon and adapted to be rotated by the rotating power derived from a power supply source of a tractor, said rotary soil crushing shaft being journalled in bearings adjacent to and along the front curved surface of said mold board with a narrow gap formed between the ends of said cultivating blades and the front curved surface of said mold board. However, mold board plough requires huge amount of draft for its operation and also the clod sizes of the soil resulting from said MB plough is bigger hence the secondary tillage implements are required for reducing the clod size of soil. US 4,204,579 discloses a rototiller or cultivator with frame that contains plurality of tines. Such tines penetrate the ground. In addition each such tine may carry a V-shaped blade increasing the mixing and aeration effect of the cultivator. However, one possible harmful effect of rototiller is the formation of a compaction layer just beyond the reach of tines and double digging is required to alleviate from such harmful effect.

Hence, it is needed to provide accurate and precise ploughing apparatus that achieves desired depth in the soil and for leveling of the farm in a single pass without using secondary implements. It is also needed to provide a cultivator that requires quite less amount of fuel consumption and labor requirement to perform soil processing for cultivation in a single pass.

Object of the invention The main object of this invention is to provide a tractor drawn rotary plough that converts barren land into cultivable land in a single pass by avoiding usage of any further secondary tillage implement. Another object of this invention is to provide a tractor drawn rotary plough that prepares the soil for seeding operation very quickly and helps in reducing the labor requirement.

Yet another object of this invention is to provide a tractor drawn rotary plough that utilizes better tractor power, high field efficiency, a quite less amount of draft operation and high quality performance. Yet another object of this invention is to provide a tractor drawn rotary plough that consists of the blades which rotates about the vertical axis which tills the soil at the higher depth that avoids compaction of the soil beneath the soil surface and breaks the soil clods. Still another object of this invention is to provide a tractor drawn rotary plough for loosening and granulating actions of plowing that improves soil structure. ,

Summary of the Invention The present invention discloses a tractor drawn rotary plough which is attached to the three point linkage system of the tractor by way of a main transverse frame at the front side and which moves along the track of the tractor with PTO speed of 540 or 1000 rpm. Said rotary plough consists of the main transverse frame, a pair of floating plates each of which being mounted at each end of said transverse frame; a plurality of rotatably coupled rotor- blade assembly arranged horizontally throughout the width of said transverse frame is rotatably mounted at the bottom of said transverse frame to substantially till the soil; a transverse levelling bar being secured at rear side of said main transverse frame for levelling tilled soil; a roller assembly being mounted at the rear side of said levelling bar to break the soil clods that being left after tilling the soil by means of said rotor blade assembly; and a gear box having an input shaft, an output shaft, a bevel gear and a plurality of spur gear. The power from the rota table PTO shaft of the tractor is transferred to the rotary plough via a propeller shaft and the gear box being assembled on said transverse frame. Detailed description of the drawings

Fig. 1 is a perspective rear view of illustrating front elevational view of tractor drawn rotary plough.

Fig. 2 is a perspective view of illustrating side view of the rotary plough.

Fig. 3 is the plan bottom view of rotors.

Fig. 4 is the plan view of a roller assembly.

Fig. 5 is the sectional view of the rotor assembly.

Fig. 6 shows the spike rollers. Detailed description of the invention

Before explaining the present invention in detail, it is to be understood that the invention is not limited in its application to the details of the construction and arrangement of parts illustrated in the accompany drawings. The invention is capable of other embodiments, as depicted in different figures as described above and of being practiced or carried out in a variety of ways. It is to be understood that the phraseology and terminology employed herein is for the purpose of description and not of limitation.

Referred to the drawing, Fig. 1 a tractor drawn rotary plough (11) is attached to the three point linkage system of the tractor by way of a main transverse frame (1) at the front side and which moves along the track of the tractor. The power from the rotatable PTO shaft of the tractor is transferred to the rotary plough (11) via a propeller shaft and a gear box (3) having a bevel gear and a plurality of spur gear combination. The gear box (3) being assembled on said transverse frame (1) comprises an input shaft, an output shaft, a bevel gear and a plurality of spur gear combination.

The PTO shaft is connected to said input shaft by means of said propeller shaft; and input shaft is connected to said output shaft by means of said bevel gear; and said output shaft is connected to said rotary-blade assembly by means of said plurality of spur gear combination The power from the rotatable PTO shaft is primarily transferred to said input shaft via said propeller shaft and from which the power is further transferred to the output shaft of the gear box (3) by means of said bevel gear and from said output shaft the power is finally distributed to a plurality of rotor-blade assembly rotary plough (11) along with said main transverse frame (1) is attached to the three point linkage of the tractor by means of a swinging bracket (2) and upper hitch point as directed in Fig. 2.

Said rotary plough consists of the main transverse frame (1), a pair of floating plates (5) each of which being mounted at each end of said transverse frame (1) as directed in Fig. 2, a plurality of rotatably coupled rotor-blade assembly (15) being rotatably mounted at the bottom of said transverse frame (1) and arranged horizontally throughout the width of said transverse frame (1), as directed in Fig. 3; a transverse levelling bar (12) being secured at rear side of said main transverse frame (1); a pair of spring arrangement (14) being secured at the bottom of said levelling bar (12) to prevent damage to the rotary plough (11); a pair of depth adjuster (4) with height adjusting handle is mounted on the said levelling bar (12) for adjusting the height or depth of the levelling bar (12); and a roller assembly (9') is mounted at the rear side of said levelling bar (12) to break the soil clods that being left after tilling the soil by means of said rotor blade assembly, as directed in Fig. 3. Said roller assembly (9'), as directed in Fig. 4 consists a plurality of horizontally arranged different soil engaging toothed rollers (9) and a supporting frame (13) being supportably mounted at each end of said transverse frame (1) for holding said plurality of rollers to rotatably engage with the ground to break the soil clods by means of land friction. Said different soil engaging toothed rollers (9) includes a rear pack roller, a spiral roller, a cage roller and a spiked roller, as directed in Fig. 6, each of which being used depending upon the soil condition and the need. In case of said rear packer roller, a swivelling arm is provided on the rear side of the rotary plough (11) to hold freely rotatable roller between the rear end of the arms which works as a packer roller and tooth of the packer roller helps in further breaking the soil clod. It possesses a great levelling and crumbling effect. In case of spiral roller, a spiral bar is wrapped around a central shaft. This kind of rollers is particularly suitable for light, sandy soil and leaves a fair amount of clod on the surface and prepares the field most suitable for seed bed. The cage roller is used for soil of medium texture. It levels the tilled soil, refines the seed bed achieving an optimum ground preparation. The spiked roller

5 consists of a cylinder equipped with a set of long teeth. It is used for all types and in all soil condition. It leaves the soil aerated and levelled.

Said pair of spring arrangement (14) provides an extra force to the levelling bar (12) and also the springs elongate when there is obstacle in the path and lift the levelling bar to prevent damage to the machine. The levelling bar comes to its original position due to the spring force when the rotary plough (11) passes the obstacle. Said floating plates (5) consist of a plurality of slots and pin. The floating plates (5) follow the contour of the soil through the slot and pin and guide the soil stream of the tilled soil in front of the rollers (9) and prevent the soil from throwing to the side.

Each of said rotor-blade assembly, as directed in Fig. 5 consists of a rota table shaft (7), a rota table flange (16) being rotatably mounted at the bottom of said shaft (7), a pair of ground engaging blade (10) which is being mounted on the bottom of the shaft (7) below the flange (16) by means of bolts rotate freely during the operation; a bearing which being rotatably provided on the said rotatable shaft (7) for smooth operation of the shaft; and a sealing package (8) which is also being provided On said rotatable shaft (7) to prevent the oil leakage.

Each of said ground engaging blades (10) is made of optimum quality steel and is heat treated to make it extremely tough and wear resistant. Further, said blades (10) are positioned at different angle with respect to nearby pair of blades so as to have the sharp edge of the blades (Ϊ0) pointed along the direction of rotation of axis to reduce the transmission of vibration and peak load on the driveline of the rotary plough (11) to result smoother operation. During the operation, the rotation of the output shaft of the gearbox (3) is coupled to said plurality of rotor-blade assembly by means of different spur gear to rotate subsequent flange in a direction opposite to each other. Due to the rotation of each of said flanges the corresponding pair of blade (10) freely rotates at a desired RPM to substantially till the soil. In consequence of tilling the soil at sufficient depth the land that has been tilled is levelled up by means of said levelling bar (12). Finally, after the levelling the soil, the clod size of the soil has been made reduced by means of passing said different soil engaging toothed rollers (9) on to said levelled soil, as directed in Fig. 2 and 6.

While, the invention has been described with respect to the given embodiment, it will be appreciated that many variations, modifications and other applications of the invention may be made. However, it is to be expressly understood that such modifications and adaptations are within the scope of the present invention, as set forth in the following claims.

Claims

We Claim:

1. A tractor drawn rotary plough (11) consists of a main transverse frame (1), a pair of floating plates (5), a plurality of rotatably coupled rotor- blade assembly (15), a transverse levelling bar (12) with a pair of spring arrangement (14), a pair of depth adjuster (4) with height adjusting handle and a roller assembly (9'); wherein said main transverse frame (1) is positioned at the front side by means of which said rotary plough (11) being attached to a three point linkage system of the tractor; wherein said main transverse frame (1) is attached to said three point linkage system of the tractor by means of a swinging bracket (2) and upper hitch point; wherein each of said pair of floating plates (5) is mounted at each end of said transverse frame (1); wherein said plurality of rotatably coupled rotor-blade assembly (15) is rotatably mounted at the bottom of said transverse frame (1) and arranged horizontally throughout the width of said transverse frame

(i); wherein said transverse levelling bar (12) is secured at rear side of said main transverse frame (1) to engage the soil processed part of the land; wherein said pair of depth adjuster (4) is mounted on said levelling bar (12); wherein said roller assembly (9') is mounted at the rear side of said levelling bar (12); wherein each of said rotor-blade assembly consists of a rotatable shaft (7), a rotatable flange (16), a pair of ground engaging blade (10), a bearing being and a sealing package (8); wherein said flange (16) is mounted at the bottom of said shaft (7);

wherein said pair of, ground engaging blade (10) is mounted on bottom side of the shaft by means of bolt to freely during an operation of the rotary plough (11); wherein said bearing is rotatably provided on the said rotatable shaft (7) for smooth operation of the shaft during said operation; wherein said floating plates (5) consists of a plurality of slots and pin to follow the contour of the soil through said slots and pin. wherein power from a rotatable PTO shaft of the tractor is transferred to the rotary plough (11) via a propeller shaft and a gearbox (3) being assembled on said transverse frame (1); wherein said sealing package (8) is provided on said rotatable shaft (7) to prevent oil leakage.

2. The tractor drawn rotary plough (11) as claimed in claim 1, wherein said gearbox (3) consists of an input shaft, an output shaft, a bevel gear, a plurality of spur gear.

3. The tractor drawn rotary plough (11) as claimed in claim 1 and 2, wherein said PTO shaft is rotatably connected to said input shaft by means of said propeller shaft; and input shaft is rotatably connected to said output shaft by means of said bevel gear; and said output shaft is rotatably connected to said rotary-blade assembly by means of said plurality of spur gear combination.

4. The tractor drawn rotary plough (11) as claimed in claim 1, wherein said roller assembly (9') consists a plurality of horizontally arranged different soil engaging toothed rollers (9) and a supporting frame (13) being supportably mounted at each end of said transverse frame (1).

5. The tractor drawn rotary plough (11) as claimed in claim 1 and 4, wherein said different soil engaging toothed rollers (9) includes a rear pack roller or a spiral roller or a cage roller or a spiked roller.

6. The tractor drawn rotary plough (11) as claimed in claim 1 and 5, in case of said rear packer roller, a swivelling arm is provided on the rear side of the rotary plough (11).

7. The tractor drawn rotary plough (11) as claimed in claim 1 and 5, in case of said spiral roller, a spiral bar is wrapped around a central shaft.

8. The tractor drawn rotary plough (11) as claimed in claim 1 and 5, wherein the spiked roller consists of a cylinder equipped with a set of long teeth for breaking the soil clods, aerating and levelling the soil.

9. The tractor drawn rotary plough (11) as claimed in claim 1, wherein each of said ground engaging blades (10) being heat treated.

10. The tractor drawn rotary plough (11) as claimed in claim 1, wherein each of said blades (10) are positioned so as to have the edge of the blades (10) pointed along the direction of rotation of axis of the blade (10) to reduce the transmission of vibration and peak load on the driveline of the rotary plough (11).