Claims:We claim,
1) A gear train for a power harrow having improved gear life comprises of,

a) a first shaft (101), said first shaft (101) having a first end and a second end;
b) a first bearing (102) is appropriately positioned on the first shaft (101) near the first end of the first shaft (101);
c) a second bearing (103) appropriately positioned on the first shaft (101) near the second end of the first shaft (101);
d) a transmission gear (104) is coupled with the first shaft (101), wherein said transmission gear (104) is positioned adjacent to the second bearing (103);
e) a receiving gear (105), said receiving gear (105) is operatively meshed with the transmission gear (104);
f) a second shaft (106), said second shaft (106) having a first end and a second end, wherein the receiving gear (105) is coupled with the second shaft (106) at the second end of the second shaft (106);
g) a spacer (107), said spacer (107) is mounted on the second shaft (106) adjacent to the receiving gear (105);
h) a third bearing (108), said third bearing (108) is appropriately mounted upon the spacer (107), wherein the third bearing (108) arrests lateral movement of the spacer (107);
i) a pinion (109), said pinion (109) is operatively mounted on the first end of the second shaft (106);
j) a fourth bearing (110), said fourth bearing (110) is appropriately mounted upon the pinion (109) at the first end of the second shaft (106), wherein the fourth bearing (110) arrests lateral movement of the pinion (109);
k) a crown wheel (111), said crown wheel (111) is operatively meshed with the pinion (109), wherein the centre axis of the crown wheel (111) is perpendicular to the centre axis of the pinion (109);
l) a third shaft (112), said third shaft (112) having a first end and a second end, wherein the first end of the third shaft (112) is coupled with the crown wheel (111); and
m) a gear unit (113), said gear unit (113) receives rotational energy from the first shaft (101) through the third shaft (112), wherein the gear unit (113) is coupled with the third shaft (112) at the second end of the third shaft (112);
wherein, position of the spacer (107) and the pinion (109) is interchangeable with each other
2) A gear train for a power harrow having improved gear life, as claimed in claim 1, wherein the gear unit comprises of,

a) a plurality of gears (114) including a first gear (114a), a second gear (114b), a third gear (114c), a fourth gear (114d), fifth gear (114e) and a sixth gear (114f);
b) a plurality of rotor shafts (115), said plurality of rotor shafts (115) are operatively coupled with the plurality of gears (114), wherein each of the plurality of rotor shafts (115) are operatively coupled with the each of the plurality of gears (114); and
c) a plurality of tine assembly (116), wherein each of the plurality of tine assembly (116) coupled with the each of the plurality of rotor shafts (115) at a pre-determined angle, said pre-determined angle of the plurality of tine assembly (116) is chosen in such a way that the plurality of tine assembly (116) does not collide with each other.

3) A gear train for a power harrow having improved gear life, as claimed in claim 1, wherein the pinion is a bevel pinion.

4) A gear train for a power harrow having improved gear life, as claimed in claim 1, wherein position of the spacer (107) along with the third bearing (108) is interchangeable with the pinion (109) along with the fourth bearing (110).

5) A method for having an improved gear life of the gears in a gear train of a power harrow, comprising of,

a) supplying energy to the first shaft (101), said energy is rotational energy;
b) transferring said rotational energy from the first shaft (101) to the second shaft (106) through the transmission gear (104) and the receiving gear (105);
c) conveying said rotational energy from the second shaft (106) to the crown wheel (111) through the pinion (109), wherein the pinion (109) is operatively mounted on the first end of the second shaft (106) and the spacer (108) is mounted on the second shaft (106) adjacent to the receiving gear (105);
d) giving said rotational energy as output to the gear unit (113) from the crown wheel (111) through the third shaft (112); and
e) providing said output rotational energy to components of the gear unit (113) including the plurality of gears (114), the plurality of rotors (115) and the plurality of tine assembly (116).

6) A method for having improved gear life of a gear train of a power harrow, as claimed in claim 5, wherein interchanging position of the spacer (107) with the pinion (109) changes the direction of output rotational energy.

7) A method for having improved gear life of a gear train of a power harrow, as claimed in claim 5 and claim 6, optionally interchanging position of the spacer (107) along with the third bearing (108) with the pinion (109) along with the fourth bearing (110).

8) A method for having improved gear life of a gear train of a power harrow, as claimed in claim 5, claim 6 and claim 7, wherein the plurality of tine assembly (116) are shifted with respect to the position of the spacer (107) and the pinion (109).
, Description:A GEAR TRAIN FOR A POWER HARROW HAVING IMPROVED GEAR LIFE AND A METHOD THEREOF
FIELD OF THE INVENTION
The present invention relates to power harrow. In particular, the present invention relates to the gear train of the power harrow having improved gear life.
BACKGROUND OF THE INVENTION
Generally, gears in gear train meshed with each other. The gears rotate in a particular direction on the basis of input direction. Unidirectional rotation of the gears leads to the faster wear of the gears. The worn gears need to be replaced for effective operation. Replacing of gears is not economical for the farmers.
European Patent EP1295520 discloses about gears of the gear train rotates in both direction by shifting contact of pinion gear from one gear to the adjacent second gear. This type of arrangement creates constraint on the compactness of the gear train of the power harrow.
Therefore, there is need in art to provide a gear train for power harrow which operates in both direction without undergoing any major changes in the design and also maintain the compactness of the gear train. Due to this operation in both direction, gears will use both sides of the gear teeth and thus less wear occurs on the gear teeth.
OBJECTIVE OF THE INVENTION
It is an object of the present invention to provide a gear train for a power harrow, which rotates its gears in both direction without changing the input rotational direction.
It is an another object of the present invention to provide a gear train for a power harrow, which does not consume large space and is compact.
It is an another object of the present invention to provide a gear train for a power harrow, which is cost effective for the farmers/user.
SUMMARY OF THE INVENTION
A gear train for a power harrow having improved gear life comprises of, a first shaft (101); a first bearing (102) is appropriately positioned on the first shaft (101) near the first end of the first shaft (101); a second bearing (103) appropriately positioned on the first shaft (101) near the second end of the first shaft (101); a transmission gear (104) is coupled with the first shaft (101), wherein said transmission gear (104) is positioned adjacent to the second bearing (103); a receiving gear (105), said receiving gear (105) is operatively meshed with the transmission gear (104); a second shaft (106), wherein the receiving gear (105) is coupled with the second shaft (106) at a second end of the second shaft (106); a spacer (107), said spacer (107) is mounted on the second shaft (106) adjacent to the receiving gear (105); a third bearing (108), said third bearing (108) is appropriately mounted upon the spacer (107); a pinion (109), said pinion (109) is operatively mounted on the first end of the second shaft (106); a fourth bearing (110), said fourth bearing (110) is appropriately mounted upon the pinion (109) at the first end of the second shaft (106); a crown wheel (111), said crown wheel (111) is operatively meshed with the pinion (109); a third shaft (112), wherein the first end of the third shaft (112) is coupled with the crown wheel (111); a gear unit (113), said gear unit (113) receives rotational energy from the first shaft (101) through the third shaft (112), wherein the gear unit (113) is coupled with the third shaft (112) at the second end of the third shaft (112). Position of the pinion (109) and the spacer (107) is interchangeable. Interchanging position of the spacer (107) and the pinion (109) changes the direction of output rotational energy. Due to this change in direction, both faces of a gear teeth of a plurality of gears (114) is utilised. Thus increases life and reduces wear rate of the plurality of gears (114) of the gear train.
BRIEF DESCRIPTION OF THE DIAGRAM
Figure 1 shows a top view of an embodied gear train for the power harrow.
Figure 2 depicts a front view of the embodied gear train for the power harrow.
Figure 3 illustrates the working of the embodied gear train for the power harrow.
Figure 4 illustrates the working of the gear train for the power harrow when the position of the spacer is interchanged with the pinion.
While the invention is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
DETAILED DESCRIPTION OF THE INVENTION
The present invention as embodied by the "A gear train for a power harrow having improved gear life and a method thereof", succinctly fulfils the above-mentioned need(s) in the art. The present invention has objective(s) arising as a result of the above-mentioned need(s), said objective(s) being enumerated below. In as much as the objective(s) of the present invention are enumerated, it will be obvious to a person skilled in the art that, the enumerated objective(s) are not exhaustive of the present invention in its entirety, and are enclosed solely for the purpose of illustration. Further, the present invention encloses within its scope and purview, any structural alternative(s) and/or any functional equivalent(s) even though, such structural alternative(s) and/or any functional equivalent(s) are not mentioned explicitly herein or elsewhere, in the present disclosure. The present invention therefore encompasses also, any improvisation(s)/modification(s) applied to the structural alternative(s)/functional alternative(s) within its scope and purview. The present invention may be embodied in other specific form(s) without departing from the spirit or essential attributes thereof.
Throughout this specification, the use of the word "comprise" and variations such as "comprises" and "comprising" may imply the inclusion of an element or elements not specifically recited.
A gear train for a power harrow having improved gear life comprises of, a first shaft (101), said first shaft (101) having a first end and a second end; a first bearing (102) is appropriately positioned on the first shaft (101) near the first end of the first shaft (101); a second bearing (103) appropriately positioned on the first shaft (101) near the second end of the first shaft (101); a transmission gear (104) is coupled with the first shaft (101), wherein said transmission gear (104) is positioned adjacent to the second bearing (103); a receiving gear (105), said receiving gear (105) is operatively meshed with the transmission gear (104); a second shaft (106), said second shaft (106) having a first end and a second end, wherein the receiving gear (105) is coupled with the second shaft (106) at the second end of the second shaft (106); a spacer (107), said spacer (107) is mounted on the second shaft (106) adjacent to the receiving gear (105); a third bearing (108), said third bearing (108) is appropriately mounted upon the spacer (107), wherein the third bearing (108) arrests lateral movement of the spacer (107); a pinion (109), said pinion (109) is operatively mounted on the first end of the second shaft (106); a fourth bearing (110), said fourth bearing (110) is appropriately mounted upon the pinion (109) at the first end of the second shaft (106), wherein the fourth bearing (110) arrests lateral movement of the pinion (109); a crown wheel (111), said crown wheel (111) is operatively meshed with the pinion (109), wherein the centre axis of the crown wheel (111) is perpendicular to the centre axis of the pinion (109); a third shaft (112), said third shaft (112) having a first end and a second end, wherein the first end of the third shaft (112) is coupled with the crown wheel (111); a gear unit (113), said gear unit (113) receives rotational energy from the first shaft (101) through the third shaft (112), wherein the gear unit (113) is coupled with the third shaft (112) at the second end of the third shaft (112).
Said gear unit (113) comprises of, a plurality of gears (114) including a first gear (114a), a second gear (114b), a third gear (114c), a fourth gear (114d), fifth gear (114e) and a sixth gear (114f); a plurality of rotor shafts (115), said plurality of rotor shafts (115) are operatively coupled with the plurality of gears (114), wherein each of the plurality of rotor shafts (115) are operatively coupled with the each of the plurality of gears (114); a plurality of tine assembly (116), wherein each of the plurality of tine assembly (116) coupled with the each of the plurality of rotor shafts (115) at a pre-determined angle, said pre-determined angle of the plurality of tine assembly (116) is chosen in such a way that the plurality of tine assembly (116) does not collide with each other.
The position of the spacer (107) along with the third bearing (108) is interchanged with the pinion (109) along with the fourth bearing (110) to change the rotational output direction.
In a first embodiment, rotational energy from the first shaft (101) is transmitted to the second shaft (106) through the transmission gear (104) and the receiving gear (105). The direction of the said rotational energy from the first shaft (101) is counter clockwise direction. The second shaft (106) rotates in clockwise direction. The pinion (109) positioned at the first end of the second shaft (106), transmits rotational energy in clockwise direction to the crown wheel (111). Said crown wheel (111) outputs the rotational energy in clockwise direction to the gear unit (113) through the third shaft (112). The first gear (114a), the third gear (114c) and the fifth gear (114e) rotates in the clockwise direction. The second gear (114b), the fourth gear (114d) and the sixth gear (114f) rotates in the counter clock wise direction. The plurality of rotor shafts (115) and the plurality of tine assembly (116) rotates in direction appropriate to their respective plurality of gears (114) rotates.
In a second embodiment, position of the spacer (107) along with the third bearing (108) is interchanged with the pinion (109) along with the fourth bearing (110), i.e. the pinion (109) is positioned adjacent to the receiving gear (108) and the spacer (107) is positioned at the first end of the second shaft (106). Said pinion (109) is meshed with the crown wheel (111). The first shaft (101) rotates in the counter clockwise direction. The rotational energy from the first shaft (101) is transmitted to the second shaft (106) through the transmission gear (104) and the receiving gear (105). The second shaft (106) rotates in clockwise direction and thus the pinion (109) rotates in clockwise direction. The crown wheel (111) which is meshed with the pinion (109) rotates in counter clockwise direction. Said crown wheel (111) outputs the rotational energy in counter clockwise direction to the gear unit (113) through the third shaft (112). The first gear (114a), the third gear (114c) and the fifth gear (114e) rotates in the counter clockwise direction. The second gear (114b), the fourth gear (114d) and the sixth gear (114f) rotates in the clock wise direction. The plurality of rotor shafts (115) and the plurality of tine assembly (116) rotates in direction appropriate to their respective plurality of gears (114) rotates.
A method for having an improved gear life of the gears in a gear train of a power harrow, comprising of,
• supplying energy to the first shaft (101), said energy is rotational energy;
• transferring said rotational energy from the first shaft (101) to the second shaft (106) through the transmission gear (104) and the receiving gear (105);
• conveying said rotational energy from the second shaft (106) to the crown wheel (111) through the pinion (109), wherein the pinion (109) is operatively mounted on the first end of the second shaft (106) and the spacer (108) is mounted on the second shaft (106) adjacent to the receiving gear (105);
• giving said rotational energy as output to the gear unit (113) from the crown wheel (111) through the third shaft (112); and
• providing said output rotational energy to components of the gear unit (113) including the plurality of gears (114), the plurality of rotors (115) and the plurality of tine assembly (116).
Further more,
• interchanging position of the spacer (107) with the pinion (109), i.e. the pinion (109) is positioned adjacent to the receiving gear (108) and the spacer (107) is positioned at the first end of the second shaft (106); and
• shifting the plurality of tine assembly (116) adjacently.
Interchanging the pinion (109) and the spacer (107), changes the direction of output rotational energy, wherein the direction of output rotational energy is reversed. Furthermore, due to interchanging the direction of rotation of the components of the gear unit (113) including the plurality of gears (114), the plurality of rotors (115) and the plurality of tine assembly (116) is reversed. Therefore both the faces of the gear teeth of the plurality of gears (114) is utilised. This improves the life of the plurality of gears (114) in the gear unit (113) and thus reduces the wear rate of the plurality of the gears (114).
Interchanging the position of the spacer (107) along with the third bearing (108) with the pinion (109) along with the fourth bearing (110) is done for ease of assembly.
The interchanging of position of the pinion (109) and the spacer (107) is to be done periodically to enhance the operating life of the plurality of gears (114) and reduce the wear rate of the plurality of gears (114). Said interchanging is done manually.
It will be apparent to a person skilled in the art that the above description is for illustrative purposes only and should not be considered as limiting. Various modifications, additions, alterations, and improvements without deviating from the spirit and the scope of the invention may be made by a person skilled in the art.