US1309801A - Tiller - Google Patents

Description

C- F. HADERER.

TILLER.

APPLICATION FILED NOV. 9, 1917.

Patented July 15, 1919.

srnrns AENT onrron.

CARL F. HADERER, OF WEST ALLIS, WISCONSIN, ASSIGNOR TO ALLIS-CHALMERS MANUFACTURING COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF DELAWARE.

Specification of Letters Iatent.

TILLER.

Application filed November 9, 1917. Serial No. 201,692.

To all whom it may concern:

Be it known that I, CARL F. HADERER, a subject of the Emperor of Germany, but having declared his intention of becoming a citizen of the United States, residing at West Allis, in the county of Milwaukee and State of Wisconsin, have invented the new and useful Tiller of which the following is a specification.

This invention relates to improvements in the construction of agricultural appliances and has specific relation to improvements in rotary soil-tilling machines.

An object of the invention is to provide a soil tiller which is simple in construction and e'fiicient in operation. One of the more specific objects is to provide an improved form of disintegrating element for rotary tillers. Another specific obj ect is to provide simple and eflicient means for resiliently and detachably connecting the disintegrat ing elements to a carrier.

It has heretofore been proposed to construct a rotary tiller of aplurality of flexible wire hooks secured to a rotating drum and adapted for angular displacement relatively to the drum around the axis of rotation. With this prior device, if a stone or similar obstruction was encountered by one of the hooks, the obstructed hook would swing inwardly toward and around the axis of rotation, thereby permitting the rotor to pass over the obstruction. n It has been found, however, that in order to provide sufficient stiffness in these wire hooks to effectively till the soil, the hooks must be made of relatively heavy wire which will not readily submit to distortion by obstructions and which will often break rather than bend. In order to overcome these :difliculties of the prior devices, the present invention'contemplates provision of a disintegrating element which in order to provide sufficient rigidity for tilling, is fixed against angular displace ment around the rotor axis and relatively to its carrier, but which will automatically move along the rotor axis and avoid injury to the rotor, in case an obstruction is encountered. With the present invention the disintegrating elements are pivoted in planes perpendicular to the rotor axis and are automatically maintained'in or returned after displacement, to such planes.

A clear con eption o a em e t f the invention may be had by referring to the drawingaccompanyingand forming a part of this specification in which like reference characters designate the same or similarparts in the various views.

. Figure clv is a side elevation of a rotary tiller having one of the rear driving wheels omitted therefrom in order to more clearly disclose other details of construction.

Fig. 2 is an enlarged side elevation of a set of three disintegrating hooks secured to a rotary carrier.

Fig. 3 is an enlarged top elevation of a cam bracketadapted to center an adjacent hook and to automatically return the hook to normal after displacement thereof.

4 is an enlarged end elevation. of the cam bracket shown in Fig. 3.

.The tractor which impels the rotary tilling device comprises a main frame 2-supported by a pair of reartraction wheels and a front steeringwheel :4. The rear traction wheels 6 are propelled by means of an engine 3 of usual construction through the usual trans-mission gearing. The front steering wheel is' manipul-able by means of a hand control 5. Secured to the rear end of the frame 2 is a rotor controlling and driving mechanism 7 which supports and forms a power transmission means for the tilling mechanism. i

. The mechanism 7 and the associated tilling mechanism, may be raised by means of motor operated lifting mechanism which is mounted on the rear of the main frame 2 and is controllable from the drivers seat.

Thetilling mechanism comprises a carrier 8 drivingly connected to a main drive shaft 9 and having mounted thereon a plurality ofdisintegrating elements. Each of the disintegrating elements comprises a spring arm .10 a head 11 locked to the spring arm by means of a cross pin 17 and a renewable point 12 fitting a tapered hole in the head 11. The inner extremities of the spring arm 10 are bent to] form pivots which engage openings 21 in brackets 13, 14 respectively. .The brackets 13, 14 are detachably secured to the carrier 8 by means of cap screws.

Each of the rear brackets 13 is provided with a pair of-warped or cam surfaces 18 which extend laterally away from a rectilinealcentering recess 19, see Figs. 3 and The ente i g miss-19 lies in the P ns of the corresponding pivot openings 21 and has a surface which engages the ad acent spring armlO and normally retains the same axis, that thespring arm 10 coacting there-- with is under considerable tension whereby the arm 10 is prevented from moving outof central or mid position unless lateral pressure is exerted against the outer-extremitythereof. By exertinglateralpressure against the spring arm 10 the same may be moved out of its normal central plane to a position such as indicated by dot and dash lines in Figs. 3 and 4. During this lateral movement of the arm 10 the portion thereof which normally rests in the recess '19, rides upon one'of the cam surfaces '18 and partially withdraws theadjacent bent end of the arm from its pivot opening 21 as indicated in Fig. 4, thereby augmenting the tension in the arm 10. Upon releasing the lateral pressure upon the arm, the tension therein assisted by centrifugal force, causes the arm 10 to automatically ride back turned to-central position upon over the adjacent v cam surface 18 and to reassume its normal mid position. By providing. double cam surfaces 18, the disintee grating elements will be automatically relateral displacement thereof in either direction.

During the normal operation of the tiller the tractor which impels the rotor is ad vanced by means of the engine 3, the direction of motion being controlled by meansof the handcontrol 5. Operation of the tiller rotor is controlled by means of levers v27 which control the raising and lowering of the rotor as well as the rotation thereof; I

The depth of tilling is controlled by means of a gage 15 associated with the tiller rotor,

and the deflector 16 prevents material from belng thrown upon the tractor. While till ing, the rotor revolves in a clockwise direction as-viewed in Figs. 1 and 2, the points 12 being driven through the soilat'a'relatlvely high rate of speed and thoroughly dislntegra'ting the same. r

If, while tilling the soil, a stone or similar obstruction is encountered by One of the points v12, the'correspondin'g disintegrating element will be moved laterally by virtue of the side thrust induced by the lateral com ponentof the resisting force. 'It has been found that in a great majority of thecases where an obstruction is encountered, such obstruction does produce a lateral component of force which will tend'to move the disintegrating element laterally; The lateral'motion of the obstructed disintegrating element will continue until this'element is able tov clear the obstruction, whereupon the disintegrating element passes the obstruction and eventually automatically returns to its normalor mid position. If the obstruction will not. produce lateral motion of the obstructed disintegrating element, the enmoved by striking the small rear ends thereof, so that replacement thereof is readily effected. The spring' arms 10 may be readily removed either by pry ng the bent ends thereof out of the openings-21 or by removing the bolts which normally retain in place the brackets 13, 14. The bolt holes of these brackets may be made --slightly larger thanthe corresponding boltsinorder to permitsome degree of'adjustment so as to vary the tension of the corresponchng springarms. W

' It shouldbe understoodthat it is not desiredto'belimited to the exact details herein shown and described,'for obvious modifications within the scope of thefapp ended claims may occur'to a person skilled in the art. 7 5. qIti's claimed and ters'Patent:

1. As an article of manufacture, a disintegrating element comprising a. bifurcated arm having 'a socket associated "therewith, and a disintegrating tool frictionally held within said socket and lyingin the plane of thebifurcations ofsaid arm.

desired tosecure by Let ;;2. As an article of manufacture,a disinte form pivots, and a disintegrating tool-asso-' ci'ated with said arm and lying'in the plane of said pivots. I I 7 4. In a tiller, a carrier having an axis, a

bifurcated spring arm associated with said 7 carrier andrevoluble about said axis, means for stressing the bifurcations of said arm by relative motion in the planethereof upon shifting said arm along said'axis, and a disintegratingjtool associated with said arm.

'5. In. a tiller, a carrier having anaxis, a

bifurcated spring arm revoluble about said axis, the ends of the arm bifurcations being associated with saidcarrier'to prevent rearward displacement of sa d arm about sald axis relatively to said carrier, means for stressing said bifurcations by relative 1110- tion in the plane thereof upon shifting of said arm along said axis, and a disintegrating tool associated with said arm.

6. In a tiller, a carrier having an axis, a bifurcated spring arm revoluble about said axis, the ends of the arm bifurcations being bent into alinement with each other, means connecting said bent ends to said carrier to prevent rearward displacement of said arm about said axis relatively to said carrier, means for stressing said bifurcations by relative motion in the plane thereof upon shifting of said arm along said axis, and a disintegrating tool assoclated with said arm.

7 In a tiller, a carrier having an axis, a

bifurcated spring arm revoluble about said axis, the ends of the arm bifurcations being bent into alinement with each other, means connecting said bent ends to said carrier to prevent rearward displacement of said arm about said axis relatively to said carrier, means comprising an element having a cam surface engageable with a bifurcation of said arm to stress said bifurcations by relative motion in the plane thereof upon shifting of said arm about said bent ends, and a disintegrating tool associated with said arm.

In testimony whereof, the signature of the inventor is affixed hereto.

CARL F. HADERER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G.

Images