CN105284209B - Blade unit and blade unit assembly for forming a perforating ventilator - Google Patents
Blade unit and blade unit assembly for forming a perforating ventilator Download PDFInfo
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- CN105284209B CN105284209B CN201510382203.6A CN201510382203A CN105284209B CN 105284209 B CN105284209 B CN 105284209B CN 201510382203 A CN201510382203 A CN 201510382203A CN 105284209 B CN105284209 B CN 105284209B
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Abstract
A blade unit and blade unit assembly for forming a perforating ventilator (10) to be operated by a work vehicle are disclosed. The punching ventilator (10) is formed of a plurality of blade units (18) rotatably supported on a support shaft. The perforating ventilator (10) is driven by torque received from the work vehicle via a power take-off shaft. Each blade unit (18) includes a hub, a pair of tines, and a cutter blade associated with each tine. The hub of each blade unit (18) includes engagement portions defined on either end of the hub. During operation of the perforating ventilator (10), each blade unit (18) engages with each other via the joint, and torque is transmitted from one blade unit (18) to the other. This helps reduce stress on the support shaft and also enables easier replacement of damaged blade units (18), thereby reducing maintenance costs and down time of the punching ventilator (10).
Description
Technical Field
The present invention relates to a blade unit for tilling. In particular, the invention relates to an assembly of a plurality of blade units for forming a punching ventilator.
Background
Sowing crops/seeds for cultivation in the field has the advantage of making the soil permeable. The substantially air-permeable soil allows air, water and nutrients to penetrate to the roots of the crops. This helps to produce healthy crops.
Traditionally, animal-driven or mechanized plows are used to cultivate fields. The use of a plough alone has been found to be insufficient for making the soil in the field permeable to air. Therefore, to achieve better ventilation of the soil, it is necessary to sufficiently crush or loosen the soil.
The requirement for better comminution or loosening of the soil has led to the emergence of rotary cultivators, also known as perforated ventilators (aerators). The perforating ventilator includes a blade arrangement driven by a Power Take Off (PTO) shaft of the work vehicle. At least one blade is in continuous contact with the field. Power from the PTO shaft causes the blades to rotate, which causes the soil in the field to break up or loosen.
Attempts have been continuously made to improve the quality of the comminution or loosening achieved by a perforated ventilator. However, conventional punching ventilators suffer from several drawbacks. One drawback of conventional ventilator vents is that they do not operate while the individual blades are being serviced. This results in a significant delay time in preparation of the field for cultivation. Further, another drawback of conventional punching ventilators is the requirement to mount each blade by bolting means, which increases the number of components involved and increases the instances of bolt wear during operation in the field. Thus, in addition to creating a significant amount of delay in the maintenance of a ventilator that is perforated, conventional perforated ventilators also involve high maintenance and operating costs.
Accordingly, it is believed that there is a need for a punching ventilator that will overcome the drawbacks of conventional punching ventilators by substantially reducing the frequency of maintenance and reducing the delay time in farming the field.
Disclosure of Invention
The invention can achieve the following objectives, thus overcoming the drawbacks of the prior art:
it is an object of the present invention to provide a punching ventilator that is directed to reducing maintenance requirements.
It is an additional object of the present invention to provide a punching ventilator that involves reduced maintenance costs.
It is another object of the present invention to provide another perforating ventilator that reduces downtime for cultivation.
It is yet another object of the present invention to provide a perforated ventilator that is capable of adequate shredding or scarifying.
It is a further object of the present invention to provide a highly efficient ventilator.
Other objects of the invention will become apparent when the description of the invention is read in conjunction with the accompanying drawings. The drawings provided herein are for illustration purposes only and are not intended to limit the scope and ambit of the present disclosure.
The present invention relates to a blade unit and an assembly blade unit forming a punching ventilator, wherein the punching ventilator cooperates with a work vehicle, in particular a tractor, for crushing or loosening soil in a field for cultivation. The hole punch ventilator of the present invention cooperates with a work vehicle, particularly a tractor, via a three-point linkage (TPL). The perforating ventilator moves over the field by virtue of traction applied by the tractor. Implementations of the present invention are contemplated to overcome the drawbacks of conventional ventilator punching, wherein the maintenance time and costs invested on a punching ventilator are substantially reduced.
According to one aspect, a plurality of identical blade units are provided, wherein each blade unit comprises a hub, a pair of tines, and a cutter blade associated with each blade unit. Each blade unit is made by welding, casting, molding or fastener securing.
The hub has a cylindrical hollow defined by a cylindrical wall portion, and has a first end portion and a second end portion. The first end and the second end are spaced apart along a longitudinal axis of the hub. An engagement portion is defined on the first and second ends of the hub. The engaging portion includes an arc-shaped protruding portion and an arc-shaped notch portion. Each engagement portion defined on the first end is tangentially displaced by a predetermined azimuthal angle relative to the engagement portion defined on the second end.
The pair of tines extend radially from the cylindrical wall portion of the hub. Each tine has a predetermined profile selected from the group consisting of a straight profile and an arcuate profile.
A cutter blade cooperates with each tine at an end remote from the hub. The cutter blade has an operable cutting edge generally orthogonal to the tines and generally parallel to the longitudinal axis. Each cutter blade has a predetermined profile selected from the group consisting of, but not limited to, a Y-shaped profile, a V-shaped profile, an F-shaped profile, a T-shaped profile, and an S-shaped profile. Each cutter blade includes a first portion and a second portion, wherein the first and second portions are adapted to extend from the tines in opposite directions. Each first portion defines a first predetermined angle with the associated tine and each second portion defines a second predetermined angle with the associated tine. The first portion of each cutter blade defines a first predetermined angle with the tine and the second portion of each cutter blade defines a second predetermined angle with the tine. In one embodiment, the first predetermined included angle is equal to the second predetermined included angle. Alternatively, the first predetermined angle may be different from the second predetermined angle. Further, the first portion and the second portion define a predetermined angle therebetween.
A plurality of blade units are rotatably mounted on the support shaft to form a perforated ventilator. The ventilator is covered in a housing that substantially conforms in shape to at least a portion of the ventilator. The support shaft is rotatably supported between the input flange and the output flange. The support shaft receives torque from the torque transfer unit via the input flange. The input and output flanges are rotatably supported on a transverse structure positioned substantially orthogonal to the support shaft. Each transverse structure is adapted to support a torque transfer unit for receiving torque from a power take-off shaft of the work vehicle. The input and output flanges are rotatably supported on associated transverse structures via associated bearing arrangements. Preferably, the support shaft, the input flange and the output flange are separate (discrete) elements, wherein the support shaft is coupled to the input flange and the output flange. Alternatively, the support shaft is integrally formed with the input flange or the output flange. The support shaft and the output flange are engaged via at least one of a threaded engagement therebetween and a threaded connector element positioned therebetween. During operation of the punching ventilator, each blade unit is functionally engaged with each adjacent blade unit via a complementary engagement portion.
The various features, aspects, and advantages of the present invention will become apparent from the following detailed description of the invention when read in conjunction with the accompanying drawings, wherein like numerals represent like components.
Drawings
The invention will now be described with respect to the accompanying drawings, in which:
FIG. 1 illustrates a punching ventilator cooperating with a tractor in accordance with the present invention;
fig. 2 illustrates a perspective front view of a punching ventilator formed by arranging a plurality of blade units, and a power transmission device for receiving power from a power output shaft of a work vehicle according to the present invention;
fig. 3 illustrates a perspective view of the perforated ventilator shown in fig. 2, showing the power transmission apparatus of fig. 2;
fig. 5 illustrates a front view of the perforated ventilator shown in fig. 3, as viewed from the X-direction;
fig. 4 illustrates an exploded view of the perforated ventilator shown in fig. 3;
fig. 6 illustrates the angular profile of the cutters associated with each blade unit of the punching ventilator;
FIG. 6A illustrates the hub of the blade to show the tangentially moving joint on either side of the hub; and
fig. 7 illustrates a perspective view of a blade unit of a perforated ventilator.
Detailed Description
Conventional ventilator punching machines suffer from several drawbacks, wherein failure of the single blade forming the conventional punching ventilator results in loss of production time of the punching ventilator. This results in a substantial loss of operating time for the perforated ventilator and also increases the overall cost of maintenance. Further, the blade is supported on a shaft, which, however, is subjected to stresses in addition to the weight of the blade, because torque is transmitted to the blade through the shaft.
The present invention stems from the observation that failure of the blade unit of conventional ventilator leads to a significant amount of delay time in completing the work that needs to be performed by the ventilator. Further, conventional punching ventilators also involve frequent failure of the shaft.
To address the problems associated with conventional punching ventilators, the present invention contemplates providing a punching ventilator formed by a plurality of blade units mounted on a support shaft for supporting the blade units. The support shaft is not configured to transmit torque to the blade unit. The blade unit is such that the maintenance time required to correct damage to the blade unit is substantially minimised. Further, since the support shaft is not subjected to stress load due to the operation of the blade unit during the crushing or loosening of soil, according to the present invention, the failure of the support shaft is minimized, thereby increasing the operation time of the punching ventilator.
Fig. 1 illustrates a perforated ventilator according to the present invention, which is particularly illustrated in fig. 2 and 3, and which is generally indicated by the numeral 10. The hole punch ventilator 10 cooperates with a tractor 12 via a three-point linkage (TPL) 14. The perforated ventilator 10 enclosed in the housing 13 operates by receiving power from a power take-off (PTO) (not shown). Referring to fig. 2 and 3, the punching ventilator 10 includes a support shaft 16, particularly illustrated in fig. 4, to enable mounting of a plurality of blade units 18. An input flange 22a and an output flange 22b are respectively provided at one end portion of the support shaft 16. The input flange 22a and the output flange 22b enable the support shaft 16 to be supported on the transverse structures 20a and 20b illustrated in fig. 5 via bearing means (not shown in the figures). The transverse structures 20a and 20b are generally orthogonal to the support shaft 16. The PTO of the tractor 12 illustrated in fig. 1 cooperates with the splined shaft 24 for transmitting torque from the PTO to the hole drilling ventilator 10 via a transmission. The transmission includes a gearbox 26 that transmits torque from the splined shaft 24 to an output shaft 28. The torque from the output shaft 28 is transmitted to the support shaft 16 specifically indicated in fig. 4 via a torque transmission unit (not specifically shown in the drawings) incorporated in the housing 30.
Referring to fig. 6, each blade unit 18 includes a hub 32, at least a pair of tines 34 with an associated cutter blade 36. The hub 32 is cylindrical in shape and includes a cylindrical hollow defined by a cylindrical wall. The hub 32 has a first end and a second end spaced apart along a longitudinal axis a-a of the hub 32. An engagement portion is defined on the first and second ends of the hub 32. Each engagement portion includes an arcuate projection 33a and an arcuate notch portion 33b, particularly illustrated in fig. 7. The joints defined on the first and second ends of the hub 32 move tangentially relative to each other by a predetermined azimuthal angle θ indicated in fig. 6A.
The pair of tines 34 extend radially from the hub 32. Each tine 34 has a predetermined profile such as a straight profile and an arcuate profile. The pair of tines 34 are integral with the hub 32 or are fitted to the cylindrical wall of the hub 32 via a suitable latching arrangement.
Each tine 34 includes an associated cutter blade 36 at the end distal from the hub 32. Each cutter blade 36 has an operable cutting edge that is generally orthogonal to tines 34 and generally parallel to the longitudinal axis a-a of hub 32. The cutter blade 36 is integral with the tines 34 or fitted to the tines 34. Each cutter blade 36 includes a first portion 36a and a second portion 36 b. The first and second portions 36a, 36b extend from the tines 34 in opposite directions such that the first and second portions 36a, 36b are connected at one end while the other ends of the first and second portions 36a, 36b diverge away from one another to define a predetermined angle therebetween. Preferably, the profile of cutter blade 36 is a V-shaped profile or a Y-shaped profile. Optionally, the profile of cutter blade 36 is an F-shaped profile, a T-shaped profile, or an S-shaped profile. The first portion 36a defines a first predetermined angle α with the tines 34 and the second portion 36b defines a second predetermined angle β with the tines 34. Typically, the first predetermined angle α is equal to the second predetermined angle β. In an alternative embodiment, the second predetermined included angle β is different from the second predetermined included angle β. The blade unit 18 is made by welding, casting, molding or fastener securing. In one embodiment, the hub 32, tines 34, and cutter blades 36 are integrally formed by casting or molding. Alternatively, the blade unit 18 is made by welding or fastening separately formed hubs 32, tines 34 and cutter blades 36. In yet another embodiment, the second portion 36b of the cutter blade 36 is secured to the first portion 36a of the cutter blade 36.
As shown in fig. 4, a plurality of blade units 18 are mounted on the shaft 16 to form the perforated ventilator 10. The perforated ventilator 10 is enclosed in a housing 13 that is substantially shaped to conform to at least a portion of the perforated ventilator. Power from the PTO shaft of the tractor 12 illustrated in fig. 1 is transmitted to the input flange 22 a. Torque is transferred from the input flange 22a to the blade unit 18 via structures (not shown) defined on the engagement surface of the input flange 22 a. Alternatively, an engagement element (not shown) is provided between the input flange 22a and the blade unit 18 of the adjacent input flange 22 a. The engagement element is also provided with an engagement portion to complement the engagement portion of an adjacent blade unit 18. Torque from the input flange 22a is transferred from the adjacent blade unit 18 to the input flange 22 a. Torque is then transferred from one blade unit 18 to the next blade unit 18 via the engagement formation of each blade unit 18 with the adjacent blade unit 18, with the engagement defined on the hub 32 of each blade unit 18 facilitating such torque transfer. Further, another engagement element 38 shown in fig. 4 is disposed between the input flange 22a and the blade unit 18 adjacent the input flange 22 a.
The support shaft 16 disposed between the input flange 22a and the output flange 22b is adapted to rotate with the rotation of the input flange 22 a. Preferably, the support shaft 16 is integrally formed with the input flange 22a or the output flange 22 b. Alternatively, the support shaft 16, the input flange 22a, and the output flange 22b are separate elements, and the support shaft 16 is coupled to the input flange 22a and the output flange 22 b. The support shaft 16 and the output flange 22b may be threadably engaged with one another, or a threaded connector element may be positioned between the support shaft 16 and the output flange 22 b. The threaded cooperation between the support shaft 16 and the output flange 22b enables continuous cooperation between the support shaft 16 and the output flange 22b without risk of disengagement.
The rotational speed of the support shaft 16 is the same as the rotational speed of the blade unit 18. Due to the synchronization of the rotational speeds between the support shaft 16 and the blade unit 18, the stress on the blade unit 18 and the support shaft 16 is effectively reduced. Thus, although the support shaft 16 also rotates along with the blade unit 18, the transmission of the torque of the blade unit 18 is not affected by the rotation of the support shaft 16. The synchronized rotation of the support shaft 16 and the blade unit 18 helps to increase the useful life of the support shaft 16 and the blade unit 18. This further helps to reduce the maintenance costs of the perforated ventilator 10.
During operation of the perforating ventilator 10, torque from the PTO is transferred to the splined shaft 24. Torque is then transferred through the transmission to drive the perforating ventilator 10. Rotation of the input flange 22a transfers torque from one blade unit 18 to the next blade unit 18 supported on the support shaft 16. The rotation of the plurality of blade units 18 in contact with the soil causes the soil to be crushed or loosened.
Therefore, the support shaft 16 in the present invention is not intended to transmit torque to the blade unit 18 although it is rotated by the torque from the PTO shaft. This reduces the stress load on the support shaft 16, thereby increasing the service life of the support shaft 16. Further, since the blade unit is not fixed to the support shaft 16, the blade unit can be removed by the outward sliding of the support shaft 16. This can make removal and replacement of a damaged blade unit 18 easier. The present invention thus helps to substantially reduce the downtime of the ventilator 10 due to maintenance. Thus, the overall costs involved in maintenance are substantially reduced.
Advantageous effects
The present invention has a number of benefits, including but not limited to the implementation of:
reduced maintenance time;
reduced maintenance costs;
reduced cultivation downtime;
sufficient pulverization or loosening of the soil; and
efficient ventilator puncture.
While the foregoing description has been described with respect to at least one embodiment, the present invention can be further modified within the spirit and scope of this disclosure. This application is therefore intended to cover any variations, uses, or adaptations of the invention using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains.
Claims (20)
1. A blade unit for a punching ventilator that cooperates with a work vehicle traveling along a direction of travel,
the blade unit includes:
a hub having a cylindrical hollow defined by a cylindrical wall portion, the hub having a first end and a second end spaced apart along a longitudinal axis of the hub;
an engagement defined on the first and second ends of the hub;
at least one pair of tines extending radially from the cylindrical wall portion; and
a cutter blade cooperating with each of the tines at an end distal from the hub, the cutter blade having an operable blade edge generally orthogonal to the tines and generally parallel to a longitudinal axis, the cutter blade including a first portion and a second portion adapted to extend from the tines in opposite directions;
the blade unit is structured for mounting on a support shaft of a punching ventilator such that the blade unit rotates in synchronization with the support shaft;
the blade unit and the support shaft are driven to rotate, respectively.
2. The blade unit of claim 1, wherein the cutter blade has a predetermined profile selected from the group consisting of a Y-shaped profile, a V-shaped profile, an F-shaped profile, a T-shaped profile, and an S-shaped profile.
3. The blade unit of claim 1, wherein each of said first portions defines a first predetermined included angle with said tines; and is
Wherein each of the second portions defines a second predetermined included angle with the tines.
4. The blade unit of claim 3, wherein said first predetermined included angle is equal to said second predetermined included angle.
5. The blade unit of claim 3, wherein said first predetermined included angle is different than said second predetermined included angle.
6. The blade unit of claim 3, wherein the first portion and the second portion define a predetermined angle therebetween.
7. The blade unit of claim 1, wherein said tines have a predetermined profile selected from the group consisting of a straight profile and an arcuate profile.
8. A blade unit according to claim 1, wherein each said engagement portion comprises an arcuate projection and an arcuate notch portion.
9. The blade unit of claim 1, wherein each of said engagement portions defined on said first end is tangentially displaced by a predetermined azimuth angle relative to said engagement portions defined on said second end.
10. The blade unit of claim 1, wherein the blade unit is made by means selected from the group consisting of at least one of welding, casting, molding, and fastener securing.
11. A perforated ventilator formed by rotatably mounting a plurality of the blade units of claim 1 on a support shaft.
12. The perforated ventilator of claim 11, wherein the perforated ventilator is covered in a housing that substantially conforms in shape to at least a portion of the perforated ventilator.
13. The perforated ventilator of claim 11, wherein the support shaft is rotatably supported at both ends thereof between a pair of transverse structures, the transverse structures adapted to be generally orthogonal to the support shaft.
14. The punching ventilator of claim 13, wherein one of the lateral structures is adapted to support a torque transfer unit that receives torque from a power output shaft of a work vehicle.
15. The punching ventilator of claim 11, wherein the support shaft is rotatably supported between an input flange and an output flange, the support shaft adapted to receive torque from a torque transfer unit via the input flange.
16. The perforated ventilator of claim 15, wherein the input flange and the output flange are rotatably supported on an associated lateral structure via associated bearing arrangements.
17. The perforated ventilator of claim 15, wherein the support shaft is integrally formed with either of the input flange and the output flange.
18. The perforated ventilator of claim 15, wherein the support shaft, the input flange, and the output flange are discrete, the support shaft being coupled to the input flange and the output flange.
19. The perforated ventilator of claim 15, wherein the support shaft and the output flange are engaged via at least one of a threaded engagement therebetween and a threaded connector element positioned therebetween.
20. The perforating ventilator of claim 11, wherein each of the blade units is adapted to functionally engage with each adjacent blade unit via a complementary engagement.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN2143MU2014 | 2014-07-02 | ||
| IN2143/MUM/2014 | 2014-07-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105284209A CN105284209A (en) | 2016-02-03 |
| CN105284209B true CN105284209B (en) | 2020-10-09 |
Family
ID=55182739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510382203.6A Active CN105284209B (en) | 2014-07-02 | 2015-07-02 | Blade unit and blade unit assembly for forming a perforating ventilator |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2016013121A (en) |
| CN (1) | CN105284209B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107836146A (en) * | 2017-07-09 | 2018-03-27 | 扬州市恒邦机械制造有限公司 | A kind of new loosenning tiller |
| CN108353541A (en) * | 2018-04-20 | 2018-08-03 | 河南田冠农业机械制造有限公司 | The tiller of multiple types farming knife |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2617865A1 (en) * | 1976-04-23 | 1977-11-03 | Ernst Weichel | DEVICE FOR SOIL LOOSENING |
| US5267517A (en) * | 1992-01-27 | 1993-12-07 | Farmers Tractor And Equipment | Multi function tillage or planting implement |
| CN2285046Y (en) * | 1997-04-01 | 1998-07-01 | 张远明 | Roller with cutter |
| CN2547098Y (en) * | 2002-04-28 | 2003-04-30 | 曹承烈 | Dual-frame rotary cultivator |
| CN201191966Y (en) * | 2008-03-21 | 2009-02-11 | 周鹏 | Stubble-cleaning rotary tillage coulter of stubble-cleaning and rotary tillage integration rotavator |
| CN103348790B (en) * | 2013-07-02 | 2015-07-29 | 邓光辉 | A kind of front positioning type rotovator |
-
2015
- 2015-03-20 JP JP2015058204A patent/JP2016013121A/en active Pending
- 2015-07-02 CN CN201510382203.6A patent/CN105284209B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016013121A (en) | 2016-01-28 |
| CN105284209A (en) | 2016-02-03 |
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