US2420645A

US2420645A - Sickle grinder

Info

Publication number: US2420645A
Application number: US494519A
Authority: US
Inventors: Earl C Beeler
Original assignee: Individual
Current assignee: Individual
Priority date: 1943-07-13
Filing date: 1943-07-13
Publication date: 1947-05-20
Anticipated expiration: 1964-05-20

Description

May 20, 1 47. E. c. BEELER SICKLE GRINDER Filed July 13, 1943 2 Sheets-Sheet 1 N Wm l-nqeni'or:

C. ,BeeZer,

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May 20,1947. E. c. BEELER SICKLE GRINDER Filed July 13, 1945 2 Sheets-Sheet 2 I a7;l CLB eeler, By M, 2:43 M

fiflorneys.

Patented May 20, 1947 UNITED STATES PATENT OFFICE 2'0 Claims.

The present invention relates to sickle sharpenters, and has for its purpose to provide a sharpener of the grinder type which may be conveniently used for sharpening the sickle blades by anyone familiar with such operation and withou t t'he necessity of a skilled operator.

The construction is such that the grinder may be conveniently attached to a motor vehicle, such as a tractor, and power "for driving the grinding wheel taken from a power unit of the tractor, that unit being here shown as the fan shaft. This combining of the grinder and tractor eliminates the necessity of leaving the field With the sickle for a shop where grinding attachments may be set up, and effects saving of time in field operacons.

With the construction herein disclosed, the

grinder maybe brought into fully operative position for grinding the sickle in an expeditious and convenient manner, but the equipment, when not in use, may be collapsed or folded into'compact condition, so as not to interfere in any way with the manipulation of the tractor in performance of its regular operations.

In the drawings herewith and forming a part of this application- Figure 1 is a plan View of the'grinder, so much of the tractor being shown as is necessary to illustrate the mounting of the grinder on the tractor and the grinder driving connections.

Figure 2 is a side view of the grinder and a portion of the tractor frame.

Figure 3 is an end view of the grinder in position for grinding the sickle, and

Figure 4 is a similar View, "showing the grinder parts in folded or collapsed position.

In the drawings, in which like numbers indicate like parts in the several views, Hi indicates atra'ctor part to which the grinder is secured. The base ll of the grinder frame may be fashioned in an suitable form. As here shown, it is made of L-shaped angle iron and is bolted or otherwise secured to the tractor frame Ill. E'xtending upward'ly from the base member II are posts l2 on which certain of the moving parts of the equipment hereinafter described, are mounted. In order to further hold and steady the base II and the posts [2 in position, I preferably provide a tie rod [3 connected with one of the posts I2 and coupled to a front portion of the tractor so as to maintain the main supporting parts in position and prevent undue vibration,

Pivotally mounted on the posts 12 are the grinder shaft supports l4 and connected to the upper ends of said members It is a long shaft bearing !5 in which is mounted for rotation the grinder shaft It. The extended shaft bearing I5 insures a firm mounting for the relatively long grinder shaft l6 so that a smooth running of the shaft I 6 is secured, excessive vibration eliminated, and the grinding stone and its drive pulley may be properly located. Shaft 16 has mounted thereon the drive pulley ll, which may be belted by the belt 18 to a pulley 1'9 mounted on any suitable drive shaft, such as the fan shaft, as here shown. Preferably, the pulley l9 will be a split pulley which may be conveniently attached to the fan shaft without the necessity of taking the shaft down or disturbing the other parts. Mounted on the shaft it is the grinding wheel 20, here shown as a coiled wheel, which form is particularly adapted for grinding the teeth of a sickle, although it will be understood that wheels of different formation may be used, dependent on the work to be done.

ls lidingly and rotatably mounted in lugs 2i carried by the base member ll is a traverse shaft 22, the lugs 2| being widely separated to give spaced bearing points for the shaft 22 and secure accurate and vibrationless sliding and rotating movements of the shaft 22 and the parts carried thereby. Secured to the shaft 22 is a sickle carrier, made up of the toothed or notched plate 23; arms 2d, and the sickle plate supporting rod 25, a sickle clamping member being provided to hold the sickle in place.

The sickle clamp is made up in any suitable fashion, being here shown as formed of a relatively long sleeve 26 slidably and rotatably mounted on the rod 25 and provided with a portion 21 having asubstantially L-shaped sickle seat. From the part 21 extends a screw supporting neck 29, a hand screw 30 being mounted in the neck 29 in such position that it can be set up to clamp a sickle in proper position on the sickle clamp for grinding. To brace the carrier frame and form a rigid structure I provide the cross struts 28 between the carrier arms 24.

The sickle clamp is mounted for independent sliding and rotary movement on the rod 25, carried by the arms 24, so that it has capacity for sliding movement relative to the grinding wheel to bring the teeth sucoessivelyinto place. Additionally, the entire sickle carrier can be movedwith the transverse shaft22 in a longitudinal direction to brin different sections of the sickle into position for grinding. The rotatably mounted sickle clamp may swing to and from the grinder 20 for the purpose of bringing the blades of the sickle into proper position for sharpening, stops 3| being provided to prevent the sickle clamp from swinging back too far on the carrier arms 24. The teeth 32 on the clamp plate 23 lie directly behind the teeth on the sickle, and when the screw 30 is set up, the sickle is held snugly against the teeth 32 so as to hold it securely in place and reduce vibration under the action of the grinder wheel and insure a correct grinding action. The clamp 23 is limited in its movement of withdrawal from the grinder, so that it cannot fall away, by means of a stop finger 33 at the lower end of one of the carrier legs which engages the underside of the base II.

In the position shown in Figure 4, the grinder is folded or collapsed and may be held in such position in any suitable manner, as by means of the spring latch 34, here shown, which is mounted on one of the legs l2 of the base I I, and engages with a portion of the shaft bearing I5. To further maintain the parts in proper collapsed position, I provide a spring clip 35 on the shaft bearing adapted to engage the neck 29 of the sickle clamp when the sickle carrier is folded, so as to prevent the sickle carrie from falling to open position when not in use. To insure against any shifting of the sickle carrier with the traverse shaft 22 when the grinder is not in use, I preferably secure the traverse shaft in any suitable manner, as, for example, by means of a cotter pin 36 which engages pin openings 31 in one of the lugs 2| on the base plate I l and registering opening in the shaft 22.

When the sickle carrier is released and in position for operation, as shown in Figure 3, the sickle will be mounted in its seat 23 and clamped in place by the hand screw 30. The power belt 18 will then be engaged with the pulley l9 on the fan shaft and the operator will move the sickle carrier to and from the grinding wheel, giving the sickle clamp a short traverse on the shaft 25 as the sickle is moved from notch to notch.

This movement of the clamp on the rod 25 will, in the example here shown, take care of substantially seven teeth of the sickle, although it will be understood that the proportions of the parts may be changed so as to take care of a less or greater number of teeth, if desired. The pitman end of the sickle may extend somewhat beyond the sickle seat, as it will be held sufficiently rigid to insure proper grinding. After the clamp on the rod 25 has taken care of the sickle teeth within its range, the whole carrier may itself be shifted with the traverse shaft 22, which slides and rotates in the lugs 2| on the base I I, so as to bring succeeding sickle teeth into position to be ground. It will be seen that the carrier frame, made up of arms 24 and rod 25, which slides with the traverse rod 22, is of such width that it furnishes a firm support for the sickle, even though the extended portions of the sickle are not immediately in contact with the toothed plate of the sickle seat. With a long sickle it will be necessary to release the sickle from its clamp, move it along the sickle seat to bring the unground section into grinding position, and complete the grinding.

In order to position the grinder shaft and properly tension its drive belt I8, I provide an adjustment of the grinder shaft l6 frame relative to the fan belt shaft, that adjustment being here shown as accomplished by means of two ratchet links 38 pivoted to the arms l4 and adapted to engage slots 39 on the uprights [2 of the grinder shaft frame.

The links 38 are preferably connected by rod 43 so that they move in unison and have suitable stops, as pins 4|, at their ends to prevent complete withdrawal from the slots 39. The ratchet links 38 not only permit adjustment of the grinder shaft It for belt tightening, but also allow for adjustment for different sizes of grinding wheels, a shorter or longer belt being used for wheels of different sizes. With this construction it is possible to maintain the grinder shaft It in different operative positions.

I have here shown an operative and satisfactory construction and the best now known to me, but it will be understood that changes in proportions of the parts and such other changes in mechanical make-up as do not depart from the invention here disclosed may be made and are to be considered as within the purview of my invention.

I claim:

1. In a sickle grinder, the combination of a supporting base, a grinder supporting shaft supported by and pivotally adjustable on said base to operative and inoperative positions, pivotally mounted shaft adjusting ratchet arms mounted on the grinder shaft supports and engaging said base, a grinding wheel and driven pulley on said shaft, a driving connection between said pulley and a power shaft, a sickle carrier pivoted on said base and movable toward and from said grinding wheel, and longitudinally movable sickle holding means on said carrier.

2. In a sickle grinder, the combination of a supporting base, a grinder supporting shaft supported by and pivotally adjustable on said base to operative and inoperative positions, a grinding wheel and driven pulley on said shaft, a driving connection between said pulley and a power shaft, a sickle carrier ivoted on said base and movable toward and from said grinding wheel, longitudinally movable sickle holding means on said carrier, and a spring latch mounted on said base for holding said pivotally adjustable grinder shaft folded or in inoperative position collapsed relative to said supporting base.

3. In a sickle grinder, the combination of a supporting base, a grinder supporting shaft pivotally adjustable on said base, a grinding wheel and driven pulley on said shaft, a driving connection between said pulley and a power shaft, a sickle carrier pivoted on said base and movable toward and from said grinding wheel, longitudinally movable sickle holding means on said carrier, a spring latch mounted on said base and engaging the shaft bearing for holding said pivotally adjustable grinder shaft folded or collapsed in inoperative position relative to said supporting base, and a spring catch on the grinder shaft bearing for holding said pivoted sickle carrier folded or collapsed in inoperative position relative to said grinder shaft and said supporting base.

4. In a sickle grinder, the combination of a supporting base, a traverse shaft mounted on said base for longitudinal and rotary movement, a grinder supporting shaft supported by and pivotally adjustable on said base, a grinding wheel and a driven pulley on said grinder shaft, a driving connection between said pulley and a power shaft, a sickle carrier mounted on and movable with said traverse shaft, a sickle seat mounted on said carrier for independent movement, and means for holding a sickle in said seat.

5. In a sickle grinder, the combination of a supporting base, a traverse shaft mounted on saidbase for longitudinal and rotary movement, a grinder supporting :shaft supported by and pivotallyadjustable onrsaidbasaa grinding wheel and a driven pulley on .said grinder shaft, a driving connection between said pulley and a power shaft, a sickle carrier mounted on and movable with said traverse shaft, a sickle seat mounted for independent movement having independent sickle blade supports on said carrier, spaced blade supports on said seat, and means for holding a sickle in said seat.

6.1m a sickle grinder, the combination of a supporting base, a traverse shaft mounted-on-said base for "longitudinal and rotary movement, a grindersupporting shaft .supported by and pivotally adjustable on said base, a grinding wheel and a driven pulley on said grinder shaft, a driving connection between said pulley and a power shaft, a sickle carrier mounted on and movable with said traverse shaft, an independently movable sickle seat having supporting teeth for the individual sickle blades on said carrier, and means for holding a sickle in said seat.

'7. In a sickle grinder, the combination of a supporting base, a traverse shaft mounted on said base for longitudinal and rotary movement, a grinder supporting shaft-supported by and pivotally adjustable on said base, a grinding wheel and a driven ulley on said grinder shaft, a driving connection between said pulley and a power shaft, a sickle carrier mounted on and movable with said traverse shaft, an independently movable sickle seat on said carrier having a plurality of spaced supports for the spaced sickle blades, and means for clamping a sickle in said seat.

8. In a sickle grinder, the combination of a supporting base mountable on a tractor frame, a grinder supporting shaft supported by and pivotally adjustable on said base, means for holding said shaft in different positions of adjustment relative to the tractor frame, a, grinding wheel and a driven pulley on said shaft, a driving connection between said pulley and a power shaft of the tractor, a sickle carrier pivoted on said base, and a sickl holding seat pivotally mounted on and independently movable longitudinally relative to said carrier.

9. In a sickle grinder, the combination of a supporting base mountable on a tractor frame, a grinder supporting shaft supported by and pivot ally adjustable on said base, means for holding said shaft in different positions of adjustment relative to the tractor frame, a grinding wheel and a driven pulley on said shaft, a driving connection between said pulley and a fan shaft of the tractor, a sickle carrier pivoted on said base, and a sickle holding seat pivotally mounted on and independently movable longitudinally relative to said carrier.

10. A sickle seat for sickle grinders of substantially L-shaped form in cross-section having spaced supports underlying the spaced teeth of the sickle, screw supporting means "above said sickle seat, and a sickle clamping screw in said supporting means.

11. In a, sickle grinder, the combination of a supporting base, a grinder supporting shaft supported by and pivotally adjustable on said base to operative and inoperative positions, means for holding said shaft in inoperative position, independent means to maintain said shaft in operative position, a grinding wheel and driven pulley on said shaft, a driving connection between said pulley and a power shaft, a sickle carrier pivoted on and longitudinally movable relative to said 6 base, and sickle holding means on said carrier mounted for longitudinalimovement with respect to said grinder supporting shaft.

I2. In a sickle grinder, the combination of a supporting base, a pair of spaced shaft supports pivoted on said base, a grinder supporting shaft carried by said supports and thereby adjustable on "said base to operative and inoperative positions, means for holding said shaft in inoperative position, ,pivotallymounted shaft adjusting arms carried on the shaft supports and engaging said base to maintain said shaft in different operative positions, a grinding wheel and pulley on said shaft, a driving connection between said pulley aLp'ower shaft, a sickle carrier pivoted on said base and movable toward and from said grinding wheel, and longitudinally movable sickle holding means on :said carrier.

13. In a sickle grinder, the combination of a supporting base, a traverse shaft mounted on said base for longitudinal and rotary movement, a grinder supporting shaft supported by and pivotally adjustable on said base, a grinding wheel and a driven pulley on said grinder shaft, a driving connection between said pulley and a power shaft, 'a sickle carrier mounted on and movable with said traverse shaft, an independently movable .sickle seat pivotally mounted on said carrier and having :a plurality of spaced supports underlying the teeth of the sickle, and means for clamping a sickle in said seat.

14. 1A sickle seat for sickle grinders of substantially L-shape'd form in cross section having spaced supports underlying the spaced teeth of the sickle, a supporting neck above said sickle seat, and a sickle clamping screw in said neck.

15. A sickle grinder for attachment on the frame of a tractor which has a power shaft, comprising a supporting base, a grinder supporting shaft supported by and pivotally adjustable on said base from and toward the power shaft of the tractor to operative and inoperative positions, a grinding wheel and driven pulley on said shaft, a driving connection between said pulley and the power shaft of the tractor, a sickle arrier pivoted on said base and movable toward and from said grinder wheel, sickle holding means on said carrier movable longitudinally of said grinder supporting shaft, and means for holding said pivotally adjustable grinder shaft folded and collapsed in inoperative position relative to said supporting base.

16. In a sickle grinder, the combination of a supporting base, a grinder supporting shaft supported by and. pivotally adjustable on said base to operative and inoperative positions, a grinding wheel and driven pulley on said shaft, a driving connection between said pulley and a power shaft, a sickle carrier pivoted on said base and movable toward and from said grinding wheel, longitudinally movable sickle holding means on said carrier, means for holding said pivotally adjustable grinder shaft folded and collapsed in inoperative position relative to said supporting base, and means for holding said sickle carrier folded or collapsed in inoperative position relative to said grinder shaft and said supporting base.

17. In a sickle grinder, the combination of a supporting frame mounted on a tractor, a grinder supporting shaft supported by and pivotally adjustable on said frame, means for holding said shaft in different positions of adjustment relative to the tractor, a grinding wheel and a driven pulley on said shaft, a driving connection between said pulley and a power shaft of the tractor,

a sickle carrier comprising spaced arms pivoted on said frame and mounted for longitudinal movement with respect to the grinder supporting shaft to move the sickle longitudinally with re-- spect to the grinding wheel, and a sickle holding seat on said carrier,

18. In a sickle grinder, the combination of a supporting structure mounted on a tractor frame, a grinder shaft supporting arm pivoted at its inner end to said structure and carrying the grinder shaft at its outer end, a sickle grinding element on said shaft, a sickle seat supporting arm pivoted at its inner end to said structure and carrying the sickle seat at its outer end, said grinder shaft supporting arm being located for movement between the tractor and said sickle seat supporting arm, means for supporting said grinder shaft arm in operative position with the grinder shaft moved outwardly from the tractor and in housed position when moved inwardly toward the tractor, and means to support the sickle seat arm in operative position with the sickle seat moved outwardly from the tractor and in housed position when moved inwardly toward the tractor.

19. In a sickle grinder, the combination of a supporting structure mounted on a tractor frame, a grinder shaft supporting arm pivoted at its inner end to said structure and carrying the grinder shaft at its outer end, a sickle grinding element on said shaft, a sickle seat supporting arm pivoted at its inner end to said structure and carrying the sickle seat at its outer end, said sickle seat being mounted for adjustment longitudinally with respect to said grinder shaft, said grinder shaft supporting arm being located for movement between the tractor and said sickle seat supporting arm, means for supporting said grinder shaft arm in operative position with the grinder shaft moved outwardly from the tractor and in housed position when moved inwardly toward the tractor, and means to support the sickle seat arm in operative position with the sickle seat moved outwardly from the tractor and in housed position when moved inwardly toward the tractor.

20. A sickle grinder for attachment on a tractor frame having a power shaft, comprising a supporting structure mounted on the tractor frame, a driven grinder shaft supporting arm pivoted at its inner end to'said structure and carrying the grinder shaft at its outer end, a driven pulley and a sickle grinding element on said shaft, a belt for connecting said pulley with a drive pulley on the power shaft of the tractor, a sickle seat supporting arm pivoted at its inner end to said structure and carrying the sickle seat at its outer end, said grinder shaft being located for movement between the.tractor and said sickle seat, means for supporting said grinder shaft arm in operative position with the grinder shaft moved outwardly from the tractor and in housed position when moved inwardly toward the tractor, said means for retaining said arm in its outer and operative position providing for the maintenance of proper drive tension on said belt.

EARL C. BEELER.

tEFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 808,260 Stansbury Dec. 26, 1905 2,188,616 Waddill Jan. 20, 1940 2,307,826 Donason Jan. 12, 1943 1,602,097 Beverly Oct. 5, 1926 2,051,071 Borst Aug. 18, 1936 674,468 Parmer May 21, 1901 342,789 Fenton June 1, 1886 105,802 Hardy July 26, 1870 233,082 Elliot Oct. 12, 1880 583,443 Allen June 1, 1897 FOREIGN PATENTS Number Country Date 27,851 Switzerland Oct. 21, 1903 144,927 Switzerland Apr. 16, 1931 755,824 France Sept. 11, 1933