CA1272903A - Method and apparatus for removing a tillage tool from a shank - Google Patents
Method and apparatus for removing a tillage tool from a shankInfo
- Publication number
- CA1272903A CA1272903A CA000524534A CA524534A CA1272903A CA 1272903 A CA1272903 A CA 1272903A CA 000524534 A CA000524534 A CA 000524534A CA 524534 A CA524534 A CA 524534A CA 1272903 A CA1272903 A CA 1272903A
- Authority
- CA
- Canada
- Prior art keywords
- shank
- tool
- fastener
- slot
- aperture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Earth Drilling (AREA)
Abstract
METHOD AND APPARATUS FOR REMOVING A TILLAGE TOOL FROM A SHANK
Abstract of the Disclosure A shank-type tillage assembly includes a replaceable tool such as a shovel or sweep having a conventional two-bolt mounting arrangement. The shank includes a top tool-attaching hole and an upright slot located below the hole which extends through to the lower edge of the shank. The structure permits a tool to be attached in a manner similar to a conventional two-bolt arrangement, but permits a worn shovel or sweep to be replaced by simply removing the upper attaching bolt and then driving the lower, worn fastener down the slot until it is free of the shank.
Abstract of the Disclosure A shank-type tillage assembly includes a replaceable tool such as a shovel or sweep having a conventional two-bolt mounting arrangement. The shank includes a top tool-attaching hole and an upright slot located below the hole which extends through to the lower edge of the shank. The structure permits a tool to be attached in a manner similar to a conventional two-bolt arrangement, but permits a worn shovel or sweep to be replaced by simply removing the upper attaching bolt and then driving the lower, worn fastener down the slot until it is free of the shank.
Description
1 METHOD AND APPARATUS FOR REMOVING A TILLAGE TOOL F~OM A SHANK
~ackground of the Invention The present invention relates generally to agricultural tillage implements, and more specifically, to a sharlk-~ype tillage assembly including a replaceable tool such as a shovel or sweep.
On implements which use a replaceable tool such as a shovel or s~eep attached to a shank, the tool typically is attached by two bolts which pass through vertically aligned holes in the l~ lower end of the shank and through corresponding holes in the tool. Nuts threaded onto the bolts are tightened against the rear of the shank to secure the tool against the front portisn of the shank. Frequently, there is a considerable amount of wear of the rear portion of ~he lower attaching bolt and the corresponding nut. This wear makes the removal of the lower attaching bolt very difficult. Consequently, ~he nut and bolt often must be cut from the shank to allow the ground engaging tool to be removed. This cutting operation is inconvenient and very time consuming. Numerous tool attaching devices have been
~ackground of the Invention The present invention relates generally to agricultural tillage implements, and more specifically, to a sharlk-~ype tillage assembly including a replaceable tool such as a shovel or sweep.
On implements which use a replaceable tool such as a shovel or s~eep attached to a shank, the tool typically is attached by two bolts which pass through vertically aligned holes in the l~ lower end of the shank and through corresponding holes in the tool. Nuts threaded onto the bolts are tightened against the rear of the shank to secure the tool against the front portisn of the shank. Frequently, there is a considerable amount of wear of the rear portion of ~he lower attaching bolt and the corresponding nut. This wear makes the removal of the lower attaching bolt very difficult. Consequently, ~he nut and bolt often must be cut from the shank to allow the ground engaging tool to be removed. This cutting operation is inconvenient and very time consuming. Numerous tool attaching devices have been
2 suggested, such as exemplified in U~S. Patents 2,097,354;
2,908,340; 3,125,170 and 4,115,021. Although these devices may reduce the time re~uired to remove a tool from the shank, most suffer from one or more disadvantages. Some of the devices include numerous components which significantly increase the complexity and expense of the attachment. Some of the devices include_rearwardly projecting members which are also susceptible ~ to wear, particularly adjacent the lower end of the shank, and, therefore, would be rendered inoperable over extended periods of use under certain soil conditions. Other types of devices utilize a single fastening member which either reduces the support of the tool on the shank or otherwise requires closely mating parts to provide adequately fixed positioning of the tool on the shank.
Objects of the Invention It is therefore an object of the present invention to
2,908,340; 3,125,170 and 4,115,021. Although these devices may reduce the time re~uired to remove a tool from the shank, most suffer from one or more disadvantages. Some of the devices include numerous components which significantly increase the complexity and expense of the attachment. Some of the devices include_rearwardly projecting members which are also susceptible ~ to wear, particularly adjacent the lower end of the shank, and, therefore, would be rendered inoperable over extended periods of use under certain soil conditions. Other types of devices utilize a single fastening member which either reduces the support of the tool on the shank or otherwise requires closely mating parts to provide adequately fixed positioning of the tool on the shank.
Objects of the Invention It is therefore an object of the present invention to
3 provide an improved mounting structure for attaching a tool to the lower end of a shank which facilitates removal of the tool from the shankO It is a further object of the invention to provide an improved method for removing the worn tool from the lower end of the shank.
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1 It is yet another object of the invention to provide attaching structure for the tool of a shank-type tillage assembly having a pair of threaded fasteners which permits the tool to be removed quickly and easily from the shank eYen when the lower fastener is severely worn or otherwise rendered inoperable~ It is another ob~ect of the present invention to provide an improved method and apparatus for removing a tool from the lower end of a shank, wherein only the upper fastener need be removed. It is a further object of the invention to l~ provide a method for removing a ~ool supported on the lower end of the shank by a pair of vertically spaced threaded fasteners whereby the tool may be removed without loosening the lower fastener to reduce the time necessary to remove and/or replace the tool even if the lower fastener becomes worn or inoperable.
It is another object of the present invention to provide structure for a removable earth-working tool connected to a shank by at least two vertically spaced fasteners wherein the shank includes structure permitting the tool to be quickly rem~ved without loosening the lower fastener. It is a further object of the invention to provide such structure which is low in cost and requires no additional structure over that of conventional bolt attaching structure.
Brief DescriPtion of the Invention In accordance with the above objects, an upright shank is provided with an upper tool attaching hole and a lower vertical slot which extends from a position below the upper hole through ~ to the bottom edge of the shank. The earth-working tool includes an upper hole for alignment with the top hole and a lower hole for alignment with the top of the slot. Conventional bolt fasteners are extended through the shovel and through the hole and the upper portion of the slot of the shank, and nuts are tightened against the back side of the shank to secure the tool on the shank. When a worn tool is to be replaced, the upper attaching bolt is removed. The shovel may then be removed by driving the lower fastener down the slot until it is free from the shank, thereby releasing the tool from the shank. The lower slot in the shank allows quick removal of worn parts when wear or corrosion on the lower threaded fastener makes it difficult or impossible to remove the fastener by loosening the nut. The mounting arrangement maintains the simplicity and '::
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1 reliability of a conventional two-bolt mounting arrangement while permitting the tool to be easily removed from the shank without loosening the lower attaching bolt. A method and apparatu are thus provided for easy removal of a tool such as a shovel or sweep from the shank without need for expen~ive or complex mounting components. The tool may be removed easily even if wear on the lower fastener makes it difficult or impossible to unfasten the lower nut from the bolt.
These and other objects~ features and advantages of the 13 present invention will become apparent from ~he reading of the following detailed disclosure taken in conjunction with the drawings.
Brief Description of the Drawings FIG. 1 is a rear view of the ~hank with the mounting arrangement of the present invention.
FIG. 2 is a side view of the shank shown in FIG. l.
FIG. 3 is a side view of the lower portion of the shank of FIGS. l and 2 with an earth-working tool connected thereto.
FIG. 4 is a view similar to FIG. 3 with a portion of a worn shovel broken away and showing removal of the tool from the shank with the lower fastening member still in positionO
DescriPtion of the Preferred Embodiment Referring to the drawings, therein is shown generally at 10 a portion of a shank-type tillage assembly including an upright shank 12 having an upper forward end l4 adapted for attachment to the frame of a tillage implement (not shown) in a ~ conventional manner. The shank 12 includes a downwardly and forwardly directed lower end 16 adapted for supporting a conventional earth-working tool 18 for forward movement through the soil. The shank 12 includes generally parallel side edges 22, 24 extending downwardly to a lower edge 26 extending between the side edges 22, 24 at the lower end 16.
The earth-working tool 18 includes a shank-attaching portion 28 which fits against the forward surface of the lower end 16.
The shank-attaching portion 2~ includes a pair of attaching holes 32, 34. The lower end 16 of the shank 12 includes an upper aperture 36 which aligns with the upper hole 32 when the tool is positioned on the lower end 16. The lower end 16 also includes an upright slot 38 having an upper aperture portion 40 adapted for alignment with the lower hole 34 of the shank-":
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l attaching portion 28 of the tool 18. The slot 38 is located directly below the upper aperture 36 and extends the aperture portion 40 through to the lower edge 26 of the lower end 16. A
first threaded fastener 44 is inserted through the upper hole 32 and upper aperture 36l and a second threaded fastener 46 is extended through the lower hole 34 and aperture portion 40.
Nuts 48 and 50 are threaded onto the rearwardly facing ends of the fasteners 44 and 46 and are tightened against the rear of the shank 12 to secure the shank-attaching portion 28 of the tool 18 against the forward face of the lower end 16 of the shank 12. The fasteners 44 and 46 include heads 54 and 5~, and the holes 32 and 34 are outwardly tapered so that the heads 54 and 56 lie flush with the forward face of the shank-attaching portion 28. The width of the slot 38 is approximately equal to, but slightly larger than the width or diameter of the shank portion of the fastener 46 but substantially smaller than the width of the nut 50. As best seen in FIGS. 3 and 4, the threaded portion of the fastener 46 and the corresponding nu~ 50 protrude downwardly and rearwardly toward the 80il S0 that they are subject to a considerable amount of wear (FIG. 4) during the course of tillage operations. Therefore, it is not uncommon for a portion of the fastener 46 and the corresponding nut 50 to wear away during tillage so that it becomes very difficult or impossible to remove the nut 50 from the fastener 46. However, by simply removing the nut 4~ from the upper fastener 44 and removinN the fastener 44, the tool 18 may be removed by driving the lower threaded fastener 46 with the nut 50 still attached thereto down the slot 38 (~IG. 4) until it is free of the standard, thereby releasing the tool from the shank 12. The fastener 46 may be driven down the slot 38, for example, by utilizing a chisel 58 positioned against the nut 50 or fastener 46 and hitting the opposite end of the chisel with a hammer 60.
This system maintains the simplicity, integrity and low cost of a conventional two-bolt mounting arrangement while permitting the tool 18 to be quickly and easily removed from the shank 12 by removing only the upper fastener 44. This removal of the tool 18 can be accomplished even when wear, corrosion, or other damage of the fastener 46 and/or the nut 50 makes it impossible to remove the fastener 46 by loosening the nut 50.
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1 It is yet another object of the invention to provide attaching structure for the tool of a shank-type tillage assembly having a pair of threaded fasteners which permits the tool to be removed quickly and easily from the shank eYen when the lower fastener is severely worn or otherwise rendered inoperable~ It is another ob~ect of the present invention to provide an improved method and apparatus for removing a tool from the lower end of a shank, wherein only the upper fastener need be removed. It is a further object of the invention to l~ provide a method for removing a ~ool supported on the lower end of the shank by a pair of vertically spaced threaded fasteners whereby the tool may be removed without loosening the lower fastener to reduce the time necessary to remove and/or replace the tool even if the lower fastener becomes worn or inoperable.
It is another object of the present invention to provide structure for a removable earth-working tool connected to a shank by at least two vertically spaced fasteners wherein the shank includes structure permitting the tool to be quickly rem~ved without loosening the lower fastener. It is a further object of the invention to provide such structure which is low in cost and requires no additional structure over that of conventional bolt attaching structure.
Brief DescriPtion of the Invention In accordance with the above objects, an upright shank is provided with an upper tool attaching hole and a lower vertical slot which extends from a position below the upper hole through ~ to the bottom edge of the shank. The earth-working tool includes an upper hole for alignment with the top hole and a lower hole for alignment with the top of the slot. Conventional bolt fasteners are extended through the shovel and through the hole and the upper portion of the slot of the shank, and nuts are tightened against the back side of the shank to secure the tool on the shank. When a worn tool is to be replaced, the upper attaching bolt is removed. The shovel may then be removed by driving the lower fastener down the slot until it is free from the shank, thereby releasing the tool from the shank. The lower slot in the shank allows quick removal of worn parts when wear or corrosion on the lower threaded fastener makes it difficult or impossible to remove the fastener by loosening the nut. The mounting arrangement maintains the simplicity and '::
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1 reliability of a conventional two-bolt mounting arrangement while permitting the tool to be easily removed from the shank without loosening the lower attaching bolt. A method and apparatu are thus provided for easy removal of a tool such as a shovel or sweep from the shank without need for expen~ive or complex mounting components. The tool may be removed easily even if wear on the lower fastener makes it difficult or impossible to unfasten the lower nut from the bolt.
These and other objects~ features and advantages of the 13 present invention will become apparent from ~he reading of the following detailed disclosure taken in conjunction with the drawings.
Brief Description of the Drawings FIG. 1 is a rear view of the ~hank with the mounting arrangement of the present invention.
FIG. 2 is a side view of the shank shown in FIG. l.
FIG. 3 is a side view of the lower portion of the shank of FIGS. l and 2 with an earth-working tool connected thereto.
FIG. 4 is a view similar to FIG. 3 with a portion of a worn shovel broken away and showing removal of the tool from the shank with the lower fastening member still in positionO
DescriPtion of the Preferred Embodiment Referring to the drawings, therein is shown generally at 10 a portion of a shank-type tillage assembly including an upright shank 12 having an upper forward end l4 adapted for attachment to the frame of a tillage implement (not shown) in a ~ conventional manner. The shank 12 includes a downwardly and forwardly directed lower end 16 adapted for supporting a conventional earth-working tool 18 for forward movement through the soil. The shank 12 includes generally parallel side edges 22, 24 extending downwardly to a lower edge 26 extending between the side edges 22, 24 at the lower end 16.
The earth-working tool 18 includes a shank-attaching portion 28 which fits against the forward surface of the lower end 16.
The shank-attaching portion 2~ includes a pair of attaching holes 32, 34. The lower end 16 of the shank 12 includes an upper aperture 36 which aligns with the upper hole 32 when the tool is positioned on the lower end 16. The lower end 16 also includes an upright slot 38 having an upper aperture portion 40 adapted for alignment with the lower hole 34 of the shank-":
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l attaching portion 28 of the tool 18. The slot 38 is located directly below the upper aperture 36 and extends the aperture portion 40 through to the lower edge 26 of the lower end 16. A
first threaded fastener 44 is inserted through the upper hole 32 and upper aperture 36l and a second threaded fastener 46 is extended through the lower hole 34 and aperture portion 40.
Nuts 48 and 50 are threaded onto the rearwardly facing ends of the fasteners 44 and 46 and are tightened against the rear of the shank 12 to secure the shank-attaching portion 28 of the tool 18 against the forward face of the lower end 16 of the shank 12. The fasteners 44 and 46 include heads 54 and 5~, and the holes 32 and 34 are outwardly tapered so that the heads 54 and 56 lie flush with the forward face of the shank-attaching portion 28. The width of the slot 38 is approximately equal to, but slightly larger than the width or diameter of the shank portion of the fastener 46 but substantially smaller than the width of the nut 50. As best seen in FIGS. 3 and 4, the threaded portion of the fastener 46 and the corresponding nu~ 50 protrude downwardly and rearwardly toward the 80il S0 that they are subject to a considerable amount of wear (FIG. 4) during the course of tillage operations. Therefore, it is not uncommon for a portion of the fastener 46 and the corresponding nut 50 to wear away during tillage so that it becomes very difficult or impossible to remove the nut 50 from the fastener 46. However, by simply removing the nut 4~ from the upper fastener 44 and removinN the fastener 44, the tool 18 may be removed by driving the lower threaded fastener 46 with the nut 50 still attached thereto down the slot 38 (~IG. 4) until it is free of the standard, thereby releasing the tool from the shank 12. The fastener 46 may be driven down the slot 38, for example, by utilizing a chisel 58 positioned against the nut 50 or fastener 46 and hitting the opposite end of the chisel with a hammer 60.
This system maintains the simplicity, integrity and low cost of a conventional two-bolt mounting arrangement while permitting the tool 18 to be quickly and easily removed from the shank 12 by removing only the upper fastener 44. This removal of the tool 18 can be accomplished even when wear, corrosion, or other damage of the fastener 46 and/or the nut 50 makes it impossible to remove the fastener 46 by loosening the nut 50.
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1 ~aving described the preferred embodiment, it will be apparent that modifications can be made without departing from the scope of the invention as defined in the accompanying claims~
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1 ~aving described the preferred embodiment, it will be apparent that modifications can be made without departing from the scope of the invention as defined in the accompanying claims~
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Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a shank-type tillage assembly including an upright shank supporting a replaceable tool such as a shovel, said shank having a lower tool-supporting end with lower and side edges and including upper and lower vertically spaced apertures, said tool including corresponding holes, and first and second threaded bolt means adapted for insertion through the respective upper and lower apertures and corresponding holes for attaching the tool to the shank, and nut means adapted for threading onto the bolt means for tightly securing the tool to the shank, the improvement comprising means facilitating removal of the tool from the shank by removal of only the first bolt means, said means facilitating comprising a slot extending from the lower aperture and opening said lower aperture through to a one of the edges of the shank to permit the lower fastener to be driven along the slot and free from the shank.
2. The invention as set forth in claim 1 wherein the slot is upright and extends from the lower aperture through to the lower edge of the shank.
3. In a shank-type tillage assembly adapted for mounting a replaceable tillage tool with at least upper and lower vertically spaced bolt-type fasteners, the tool including upper and lower vertically spaced holes for receiving the fasteners, wherein the lower fastener includes a projecting threaded end and mating threaded nut which are subject to wear during tillage operations, an upright shank including: a lower tool-supporting end having a lower edge, a first aperture adapted for alignment with the upper hole for receiving the upper fastener, a slot located below the first aperture and adapted for alignment with the lower hole for receiving the lower fastener with the projecting end and mating nut offset from the shank, said slot extending through to the lower edge for permitting the projecting end with the nut threaded thereon to be driven along the slot for removal of the tool from the tool-supporting end by removing the upper fastener only without removal of the lower fastener from the tool.
4. A method of removing a replaceable tool such as a sweep from the lower end of an upright shank, the shank including vertically spaced upper and lower apertures and the tool including mating first and second holes alignable with the respective upper and lower apertures and receiving first and second threaded fasteners through the first hole and upper aperture, and second hole and lower aperture, respectively, said method including the steps of:
a) providing an elongated slot in the lower end of the shank from the lower aperture through to one edge of the shank;
b) removing the first fastener from the upper aperture and first hole; and c) forcing the tool from the lower end of the shank by driving the second fastener the length of the slot and off the shank.
a) providing an elongated slot in the lower end of the shank from the lower aperture through to one edge of the shank;
b) removing the first fastener from the upper aperture and first hole; and c) forcing the tool from the lower end of the shank by driving the second fastener the length of the slot and off the shank.
5. The method as set forth in claim 4 wherein step a) includes extending the lower aperture through to the lower end of the shank by providing an upright slot and step c) includes driving the second fastener down the slot.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US805,660 | 1977-06-13 | ||
| US80566085A | 1985-12-06 | 1985-12-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1272903A true CA1272903A (en) | 1990-08-21 |
Family
ID=25192145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000524534A Expired - Lifetime CA1272903A (en) | 1985-12-06 | 1986-12-04 | Method and apparatus for removing a tillage tool from a shank |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU6567486A (en) |
| CA (1) | CA1272903A (en) |
-
1986
- 1986-11-24 AU AU65674/86A patent/AU6567486A/en not_active Abandoned
- 1986-12-04 CA CA000524534A patent/CA1272903A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| AU6567486A (en) | 1987-06-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |