DESC:TECHNICAL FIELD
[001] The embodiments herein generally relate to agricultural implements. More particularly, but not exclusively to a blade assembly for an agricultural implement having spring mechanism that permits the blades to deflect or turn aside during an impact with at least one obstacle.
BACKGROUND
[002] Farmers utilize a wide variety of agricultural tillage implements to prepare soil for planting. Some of the implements include two or more sections coupled together to perform multiple functions as they are pulled through the fields by an agricultural vehicle such as a tractor. For example, a cultivator and a harrow are used together, which can simultaneously till and level the soil in preparation for planting.
[003] A conventional agricultural implement includes a driven shaft, on which are mounted on plurality of rotary tillage members having soil engaging blades, the outer extremities of which are generally parallel to the shaft. The blades erupt the soil from below the seed bed depth upwardly so as to open up the soil.
[004] Blades of the rotavator or rotary tillage members get damaged when the blades encounter hard objects (for example, stones, rocks, roots, and so on) which are usually present in abundance in fields. The blades when pressed against hard objects may bend or break or disengage from the rotating shaft or suffer other serious damage which is undesirable. Further, the rotating shafts having the blades are prone to bend or damage on only one side due to prolonged usage which in turn can affect the life of the rotary tillage members.
[005] Therefore, there exists a need for an agricultural implement having a blade assembly comprising a spring mechanism that permits the blade to deflect or turn aside during impact with at least one obstacle, to eliminate the aforementioned drawbacks.
OBJECTS
[006] The principal object of the embodiments disclosed herein is to provide an agricultural implement having a blade assembly comprising a spring mechanism that permits the blade to deflect or turn aside on impact with at least one obstacle.
[007] Another object of the embodiments disclosed herein is to provide an agricultural implement having a blade assembly comprising plurality of magnetic blades along with the spring mechanism that permits the blades to be closer during an operation on soil and deflects on impact with at least one obstacle.
[008] These and other objects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the embodiments herein without departing from the spirit thereof, and the embodiments herein include all such modifications.
BRIEF DESCRIPTION OF DRAWINGS
[009] The embodiments herein are illustrated in the accompanying drawings, throughout which like reference letters indicate corresponding parts in the various figures. The embodiments herein will be better understood from the following description with reference to the drawings, in which:
[0010] FIG. 1 depicts a perspective view of an agricultural implement, according to an embodiment as disclosed herein.
[0011] FIG. 2 depicts a schematic view of a spring mechanism coupled between a blade and a flange, according to an embodiment as disclosed herein; and
[0012] FIG. 3 depicts a schematic view of a spring mechanism coupled between a magnetic blade and a flange, according to an embodiment as disclosed herein.

DETAILED DESCRIPTION
[0013] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
[0014] The embodiments herein disclose an agricultural implement having a blade assembly 100 comprising a spring mechanism that permits the blade to deflect on impact with at least one obstacle “S”. Further, the embodiments herein achieve an agricultural implement having a blade assembly 100 comprising a plurality of magnetic blades with the spring mechanism that permits the blades to be closer during an operation on soil and deflects or turns aside on impact with at least one obstacle “S”. Referring now to the drawings and more particularly to FIGS. 1 through FIG. 3, where similar reference characters denote corresponding features consistently throughout the figures, there are shown embodiments.
[0015] FIG. 1 depicts a perspective view of the agricultural implement, according to an embodiment as disclosed herein. In an embodiment, the agricultural implement 200 includes a frame 114, a driving means (not shown) coupled to a drive shaft(not shown),a drive shaft gear wheel 102, at least one first rotary shaft 104, a first shaft gear wheel 104a, the at least one first rotary shaft 104 having at least one first flange 106, the at least one first flange 106 having at least one first blade106a, at least one second rotary shaft 108, a second shaft gear wheel 108a, the at least one second rotary shaft 108 having at least one second flange 110, the at least one second flange 110having at least one second blade110a, and at least one pre-stressed/pretension spring 112 coupled between each of the corresponding blades and the flanges of the first rotary shaft 104 and the second rotary shaft 108.
[0016] In an embodiment, the agricultural implement 200 is pulled by the tractor. The tractor has a conventional power take-off shaft (not shown) extending rearward from its body and a drawbar structure mounted on the underside of the body and extending rearward from the tractor to terminate at its rearward end in a clevis type connection (not shown). These and all other features of the tractor are conventional and consequently details are neither shown nor described relative to those features.
[0017] The agricultural implement 200includes the frame 114. The frame 114 is composed of a front transverse beam (not shown) extending across the front end of the agricultural implement 200. In an embodiment, the frame114 is configured to be connected to the clevis by means of a pin (not shown). In an embodiment, the frame 114 may be adjusted vertically and relative to the ground. The frame 114 includes a top cover 116 disposed between a left side wall 118 and a right side wall 120.
[0018] The agricultural implement 200 includes the drive shaft (not shown). The drive shaft (not shown) is coupled to a drive shaft gear wheel 102 at a first side 114a of the frame 114. In an embodiment, the drive shaft (not shown) is rotated by the driving means (not shown).The driving means is rotated by a power take-off unit (PTO) of the tractor. The power take off unit produces a torque T.
[0019] The agricultural implement 200 includes at least one first rotary shaft 104 (here after first rotary shaft 104). The first rotary shaft 104 is disposed in the frame 114.The first rotary shaft 104 is connected to the at least one first gear wheel 104a at a first end 114a of the frame 114 as shown in FIG. 1. The first rotary shaft 104 is driven by the drive shaft (not shown) through the drive shaft gear wheel 102. The first rotary shaft 104 includes the at least one first flange 106. In an embodiment, the first rotary shaft 104 may include a plurality of first flanges 106. At least one first blade 106a is coupled or connected to each of the flanges 106. In an embodiment, each of the flange 106 may include a plurality of first blades 106a. In an embodiment, the plurality of first flanges 106 is rotated in a forward direction F. However, it is also within the scope of the invention to provide any rotation direction for the plurality of first flange 106 without otherwise deterring the intended function of the rotation as can be deduced from this description and corresponding drawings.
[0020] In an embodiment, the agricultural implement 200 includes at least one second rotary shaft 108 (hereafter referred to as the second rotary shaft 108). The second rotary shaft 108 is disposed in the frame 114. The second rotary shaft 108 is connected to the at least one second gear wheel 108a at a first end 114a of the frame 114 as shown in FIG. 1. The second rotary shaft 108 is driven by one of the drive shafts (not shown) through the drive shaft gear wheel 102 or by the first shaft gear wheel 104a. At least one second flange 110 is coupled to the second rotary shaft 108. In an embodiment, the second rotary shaft 108 may include a plurality of second flanges 110. In an embodiment, the plurality of second flanges 110 includes the plurality of second blade110a. The plurality of second flange 110 is rotated in reverse direction R. However, it is also within the scope of the embodiments herein to provide any rotation direction for the plurality of second flange 110 without otherwise deterring the intended function of the rotation as can be deduced from this description and corresponding drawings.
[0021] For the purpose of this description and ease of understanding, the agricultural implement 200is explained herein below with reference to be provided in an agricultural vehicle. However, it is also within the scope of the invention to assemble the blade assembly 100 in a single rotor shaft agricultural implement 200 without otherwise deterring the intended function of the tilling the soil as can be deduced from the description and corresponding drawings.
[0022] In an embodiment, the blades 106a and 110a are fabricated in a shape selected from a group comprising L shape, C shape and J shape. However, it is also within the scope of the invention to provide any shape of blade for fabricating the blade without otherwise deterring the intended function of the tilling as can be deduced from this description and corresponding drawings.
[0023] FIG. 2 depicts a schematic view of a spring mechanism coupled between a blade and a flange, according to an embodiment as disclosed herein. The agricultural implement 200includes the blade assembly 100 having the at least one pre-stressed/pretension spring 112 coupled between the first flange 106 and each of the first blade 106a. In an embodiment, the pre-stressed/pretension spring is a coil spring 112 having a first end 112a and a second end 112b. The coil spring 112 includes at least one of vertical spring axis, horizontal axis and/or may include an inclined axis (not shown) passing concentrically therethrough. In an embodiment, the choice of orientation of the coil spring 112 in the vertical axis is for convenience of mounting only and need not necessarily be so aligned in all embodiments. The first end 112a of each of the coil spring 112 is connected to the corresponding flanges on the first rotary shaft 104. Similarly, the second end 112b of each of the coil spring 112 is connected to the first blades 106a. The spring 112 is a pre-stressed/pretension coil spring having predetermined tension or stress.
[0024] In an embodiment, the coil spring 112 is a high tension spring. However, it is also within the scope of the embodiments herein to use any type of spring having either high or low tension without otherwise deterring the intended function of expansion and/or compression as can be deduced from the description and corresponding drawings.
[0025] In an embodiment, the first blades 106a are pivotably connected to the first flange 106 at a pivot point defined in the flanges through a shievel 122. In an embodiment, the shievel 122 connects the first blades 106a with the first flange 106 and is configured to allow the first blades 106a to move/displace within a predetermined limit.
[0026] The cutting blades, i.e., the first blades 106a, are configured to move/displace/turn aside during an impact with an obstacle “S”. The first blades 106a are held in their original position by the coil spring 112. In an embodiment, the first blades 106a are configured to move/displace when a mechanical force acts on the first blades 106a (due to the impact with the obstacle) is higher than a predetermined force through which the first blades 106a are held in their original position.
[0027] FIG. 3 depicts a schematic view of a spring mechanism coupled between a magnetic blade and a flange, according to an embodiment as disclosed herein. In an alternate embodiment, the agricultural implement 200 includes the blade assembly 100 having a plurality of magnetic cutting blades (i.e. the first blades 106a) along with the spring mechanism that permits the blades to be closer during the operation in the soil and deflects in at least one of upward direction and/or in downward direction on impact with at least one obstacle “S”.
[0028] The magnetic cutting blades (i.e. the first blades 106a) are pivotably connected to the first flange 106 at the pivot point defined in the flanges through the shievel 122. The shievel 122 connects the magnetic cutting blades (i.e. the first blades 106a) with the first flange 106 and is configured to allow the first blades 106a to move/displace within a predetermined limit. In an embodiment, the magnetic cutting blades (i.e. the first blades 106a) are configured to move/displace when a mechanical force acting on the magnetic cutting blades (due to the impact with the obstacle) is higher than a predetermined force through which the magnetic cutting blades (i.e. the first blades 106a) are held in their original position. In an embodiment, the coil spring 112 is a low tension spring. However, it is also within the scope of the embodiments herein to use any type of spring having either high or low tension without otherwise deterring the intended function of expansion and/or compression as can be deduced from the description and corresponding drawings.
[0029] The technical advantages disclosed by the embodiments herein are, the agricultural implement 200 mixes and pulverizes the tilled soil well resulting in a good clod size distribution. The number of tillage passes required to achieve an acceptable tilt quality, using implement, is also significantly reduced. Further, damage of the rotating shafts and blades due to impact of stones and roots in soil are evaded.
[0030] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
,CLAIMS:We claim,
1. A blade assembly 100 for an agricultural implement 200, said agricultural implement 200 having a frame 114 and at least one first rotary shaft 104 disposed within said frame 114, comprising:
at least one first flange 106 coupled to said first rotary shaft 104;
at least one first blade 106a connected to said first flange 106; and
at least one spring 112 coupled between said first flange 106 and said first blade 106a;
said spring 112 is configured to deflect said first blade 106a in one of upward direction and in downward direction on impact with at least one obstacle.
2. The blade assembly 100 as claimed in claim 1, wherein said spring 112 includes a first end 112a and a second end 112b, said first end 112a of said spring 112 is connected to said first flange 106 and said second end 112b of said spring 112 is connected to said first blade 106a.
3. The blade assembly100 as claimed in claim 1, wherein said spring 112 includes at least one of a vertical spring axis, a horizontal spring axis and an inclined axis.
4. The blade assembly100 as claimed in claim 1, wherein said spring 112 is a pre-stressed/pretension coil spring having predetermined tension or stress.
5. The blade assembly100 as claimed in claim 1, wherein said spring 112 is configured to at least one of expand and compress on impact with at least one obstacle.
6. The blade assembly100 as claimed in claim 1, wherein said first blades 106a are pivotably connected to said first flange 106 at a pivot point defined in said flange through a shievel 122.
7. The blade assembly100 as claimed in claim 1, wherein said spring 112 is configured to allow said first blade 106a to move or displace within a predetermined limit.
8. The blade assembly100 as claimed in claim 1, wherein said first blade 106a is configured to move or displace when a mechanical force acting on said first blade 106ais higher than a predetermined force which holds said first blade 106a in an original position, wherein the mechanical force acting on said first blade 106ais due to impact with said at least one obstacle.
9. The blade assembly100 as claimed in claim 1, wherein said first blade 106a is made up of magnetic material.
10. The blade assembly100 as claimed in claim 1, wherein said first blade 106a is made up of non-magnetic material.
11. The blade assembly100 as claimed in claim 1, wherein said blade assembly 100 includes a plurality of first magnetic blades 106a along with said spring 112 that permits said blades106a to be closer during an operation in soil and configured to deflect in one of upward direction and downward direction on impact with at least one obstacle.