DISC BLADE SHARPENER
A disc blade sharpener. A wheel carriage includes a rotatable abrasive wheel contactable against the side surface of the cutting edge of the disc blade. A rotatable driver wheel mounted on the carriage rotates the disc blade while the abrasive wheel contacts and sharpens the cutting edge of the disc blade. The carnage includes an electric motor, abrasive wheel, and driver wheel that may be adjustably moved both in a horizontal direction and a vertical direction relative to the concave disc blade.
1. Field of the Invention
The present invention relate, generally to the field of sharpening devices, and more specifically those used for sharpening disc blades.
2. Description of the Prior Art
Soil cultivators a include a plurality of discs rotatably driven to engage and cultivate the ground. The blades may take different shapes. For example, in
One embodiment of the present invention is a sharpener for engaging and sharpening a disc blade with the disc blade mounted on and rotatably by a shaft of an implement resting atop a supporting surface. A frame has a longitudinal axis and a support upon which the frame is movable across the supporting surface to and from the disc blade. The frame further has a handle to grasp and direct the frame across the supporting surface in the direction of the axis. A power source is mounted on the frame and has a rotatable output. A driver wheel is mounted on the frame and is rotatably driven by the output to rotate the disc blade. An abrasive wheel is rotatably mounted on the frame and rotatably driven by the output against the disc blade for sharpening thereof.
It is an object of the present invention to provide a new and improved disc blade sharpener.
A further object of the present invention is to provide a disc blade sharpener that may be used to sharpen a plurality of concave disc blades facing one direction and a plurality of concave disc blades facing an opposite direction.
Related objects and advantages of the present invention will be apparent from the following description.
For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated device, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates.
A disc blade sharpener 17 (
A carriage 30 (
The carriage includes a pair of tubes 31 and 32 (
Electric motor 7 includes a downwardly extending right angle bracket 36 having a distal end 37 mounted atop a pair of vibration isolators 38 and 29. A pair of conventional fastening devices 40 and 41 extend through plate 33, isolators 38 and 29 and distal portion 37 of bracket 36 thereby mounting the electric motor to carriage plate 33. The vibration isolators may be produced from any suitable vibration isolating material such as rubber or plastic. Fastening devices 40 and 41 may take the form of bolts and mating internally threaded nuts.
The rotatable output shaft 38 of electric motor 7 has a distal end portion having a disc shaped abrasive wheel 34 fixedly mounted thereon in conventional manner. Electric cord 92 is connected to motor 33 and has an input plug mounted to the end of the sharpener 17.
A protective shield 42 mounted to plate 33 extends partially around abrasive wheel 34 and includes a sidewall having a conventional bearing 43 mounted thereto through which axle 38 extends. Abrasive wheel 34 extends outwardly of shield 42 so that the side cutting surfaces 44 and 45 are available to contact and sharpen the concave disc blades of
Disc shaped drive roller 35 is wheel shaped and mounted to axle 46 (
A cross member 52 is fixedly fastened to and extends between tubes 31 and 32 (
Bars 27 and 26 (
Belt cover 73 (
External tube 25 (
The procedure for sharpening the concave disc blade 14 of
Activation of motor 7 results in rotation of the output shaft 38 thereby causing belt 71 to rotate sprocket 70 causing axle 46 to rotate in the direction of arrow 90 along with drive wheel 35, in turn, causing rotation of disc 14 in the direction of arrow 96. With the disc rotating, final adjustment via lever 80 may be made to position abrasive side surface 44 in contact with edge concave surface 92 thereby causing edge 16 to be ground and sharpened. As the output shaft of motor 33 rotates, axle 38 will rotate in the direction of arrow 97 which is in the same direction 90 as axle 46.
Prior to contacting the abrasive side surface of abrasive wheel 34 with disc 14, it may be necessary to position the vertical height of abrasive wheel 34 relative to the disc. Bars 26 and 27 (
The method of sharpening a disc blade having a side surface and a circumferentially extending cutting edge with the disc blade mounted on a rotatably shaft includes providing a sharpening device having a frame, an abrasive wheel rotatably mounted on the frame, and a wheel-shaped engager rotatably mounted on the frame. The sharpening device is moved toward the disc blade until the engager contacts the disc blade with the engager being rotated thereby rotating the disc blade. The abrasive wheel is moved laterally against a side surface of the disc blade and rotated while in contact with the side surface thereby sharpening the cutting edge of the disc blade. The abrasive wheel may be moved vertically on the frame and relative to the disc blade.
While the invention has keen illustrated and described in detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character, it being understood that only the preferred embodiment has been shown and described and that all changes and modifications that come within the spirit of the invention are desired to be protected.
Claims
1. A sharpener for engaging and sharpening a disc blade having a cutting edge with the disc blade mounted on and rotatably by a shaft of an implement resting atop a supporting surface comprising:
- a frame with a longitudinal axis and having a support upon which said frame is movable across a supporting surface to and from an implement having a disc blade, said frame further having a handle to grasp and direct said frame across the supporting surface in the direction of said axis;
- a power source mounted on said frame and having a rotatable output;
- a driver wheel mounted on said frame and rotatably driven by said output to rotate said disc blade; and,
- an abrasive wheel rotatably mounted on said frame and rotatably driven by said output against said disc blade for sharpening thereof.
2. The sharpener of claim 1 and further comprising:
- a carriage mounted to said frame and connected with said abrasive wheel to move said abrasive wheel laterally relative to said longitudinal axis and independent of movement of said frame to contact laterally said disc blade.
3. The sharpener of claim 2 wherein said abrasive wheel is rotatably driven to cause relative motion between said abrasive wheel and said disc blade sharpening the edge of the disc blade.
4. The sharpener of claim 1 and further comprising:
- an adjustment structure mounted to said frame and connected with said abrasive wheel to move said abrasive wheel vertically independent of movement of said frame positioning said abrasive wheel vertically relative to said disc blade.
5. The sharpener of claim 1 wherein said handle is pivotably mounted to said frame to allow said handle to be lifted upwardly pivoting said frame on said support and move the sharpener in wheelbarrow fashion to and from the implement.
6. The sharpener of claim 1 wherein said abrasive wheel has a first axis of rotation and said driver wheel has a second axis of rotation parallel to said first axis, said abrasive wheel includes a side abrasive surface perpendicular to said first axis with said abrasive surface movable against said disc blade to sharpen the cutting edge of the disc blade.
7. The sharpener of claim 6 and further comprising:
- a carriage mounted to said frame and connected with said abrasive wheel to move said abrasive wheel laterally relative to said longitudinal axis and independent of movement of said frame to contact laterally said disc blade with said driver wheel contacting and rotating said disc blade; and
- wherein said handle is pivotably mounted to said frame to allow said handle to be lifted upwardly pivoting said frame on said support and move the sharpener in wheelbarrow fashion to and from the implement.
8. A sharpener for a concave disc blade provided on an agriculture implement wherein the disc blade is rotatable driven on a shaft and has a concave side surface and a circumferentially extending cutting edge with an edge side surface comprising:
- a frame having a longitudinally extending axis and a supporting foot;
- power means having rotating output means;
- an engager mounted to said frame that is rotatably driven and connected to said power means to rotate the disc blade when the frame is moved into engagement with the agriculture implement having the disc blade mounted thereon; and,
- an abrasive wheel mounted to said frame and rotatably driven and connected to said power means, said wheel having an abrasive side surface laterally movable against and edge side surface of the disc blade to sharpen the cutting edge of the disc blade.
9. The sharpener of claim 8 wherein:
- said engager is wheel-shaped and is contactingly engageable with the disc blade,
- said engager is rotatably by said power means to cause rotation of the disc blade when said frame is moved to contact the disc blade.
10. The sharpener of claim 9 wherein:
- said abrasive wheel is movable sideways generally perpendicular to said longitudinally extending axis of the frame to contact the abrasive side surface at the location of the cutting edge to sharpen same.
11. The sharpener of claim 10 and her comprising:
- a first locating mechanism movably mounted to said frame and connected to said abrasive wheel to move said abrasive wheel vertically relative to the disc blade.
12. The sharpener of claim 11 and further comprising:
- a second locating mechanism movably mounted to said frame and connected to said abrasive wheel to move said abrasive wheel laterally and perpendicular to said longitudinal axis to and from the disc blade.
13. A method of sharpening a disc blade having a side surface and a circumferentially extending cutting edge with the disc blade mounted on a rotatably driven shaft comprising the steps off:
- providing a sharpening device having a frame, an abrasive wheel rotatably mounted on said frame, and a wheel-shaped engager rotatably mounted on said frame;
- moving said sharpening device toward a disc blade mounted on a rotatable shaft;
- rotating said wheel-shaped engager to rotate said disc blade;
- moving said abrasive wheel laterally against a side surface of the disc blade; and,
- rotating said abrasive wheel while said abrasive wheel is in contact with said side surface sharpening the cutting edge of the disc blade.
14. The method of sharpening a disc blade of claim 13 and comprising the additional step of:
- moving said abrasive wheel vertically on said frame to move said abrasive vertically relative to said disc blade.
Type: Application
Filed: Apr 3, 2007
Publication Date: Oct 9, 2008
Inventor: Eric Warrenburg (Franklin, IN)
Application Number: 11/695,857