US2038715A - Agricultural disk machine - Google Patents

Description

April 28, 1936. J. CHAMBERS ETYAL 2,038,71

AGRICULTURAL DISK MACHINE Filed Feb. 23, 1935 Rv ATTORNEY.

Patented Apr. 28, 1936 PATENT OFFICE,

AGRICULTURAL DISK MACHINE James Chambers, Saskatoon, Saskatchewan, and Bess Ego, Toronto, Ontario, Canada, assignors to Massey-Harris Company, Limited, Toronto,

Ontario, Canada Application February 23, 1935, Serial No. 7,876

8 Claims.

This invention relates to agricultural disk machines in which a plurality of disk members are mounted on a frame, and is particularly directed to the capacity of the machine to ride over stones or other obstructions found in the ground under cultivation.

V The chief object of the invention is to provide a. construction which makes it much easier for the machine to ride over stones or other obstructions, engaged by one or more of the disk members, than for heretofore known machines. A specific object is to provide a structure. which will permit the machine to ride over a stone without substantial influence by the weight of 1;, the rear furrow wheel which is normally a considerable'distance to the rear of the axis of the disk members. A further object is to provide a draft hitch which offers little, if any, resistance to the normal tendency of the main frame to tilt forward when the disc members ride over an obstruction.

The invention contemplates a construction which is free to buckle at two points as the disk members ride over a stone, that is, at the junction between the main frame and the frame and axle of the rear furrow wheel and at the junction line between the main frame and the draft hitch, as will be more fully explained by reference to the accompanying drawing in which:

Figure 1 is a perspective view of a disk machine embodying the invention and with parts broken away, which are not necessary to illustrate the invention.

Figure 2 is an enlarged elevation View of the 35 novel means for connecting the main frame and rear furrow wheel assembly.

Figure 3 is a partial plan view illustrating the draft hitch connection with the main frame. 7

In the drawing, i is a main frame cross memher, to the rear of which disk members 2 are mounted in assembled relation with end member 3 of the frame and side wheels 4 and 5, as is common construction. A rear wheel assembly includes a rear furrow wheel 6 which is mounted on an axle l, the remote end of which engages a socket bearing 8. This bearing has at its lower end a forward extension or lug 9 engaging a fork at the rear of the end member 3 of the main frame and a rearward extension H] to which a bracket ll of a rear wheel positioning device II is pivotally attached by means of a pin l2. The positioning device also includes a cam member i I secured to bracket l l and which bears on the axle 1 of the rear wheel 6. A pin I3 pivots the lug 9 on the fork. At the upper end of the socket bearing 8 is a forward extension M which carries'a bracket I 5 providing an elongated slot constituting a sliding bearing for a pin l6 carried by a bracket I! mounted loosely adjacent one end of a rod I 8, the other end of. which is pivoted in the bracket II. A spring !9 is positioned on the rod I8 with a nut 2!! for pressure adjustment. The usual depth adjustment rod 2| is adjustably connected to the bracket 15. A spring 22 connects the main frame with the socket bearing 8 by means of a bar 23.

The tension of the spring l9 on the rod I8 is so adjusted by means of the nut 20 that the pressure exerted by the cam member H of the rear wheel positioning device on the axle I through bracket II is such that the left end of the machine, as viewed in Figure 1, will not swing back when operating in soft land conditions but, at the same time, when the machine turns sharply to the left and a positive pressure is exerted by the axle l on the cam member H, the member II will raise and allow the axle and wheel 6 to swivel.

v The draft hitch is pivotally connected directly to the main frame member I, as illustrated. A main member 24 is pivotally connected to the frame at 25 and is angularly disposed to receive a member 26, also pivotally connected to the frame at 21. The member 24 has pivotally connected at its end an extension member 28, to which the usual steering arm 29 is attached. These members are adjustable as to length, as shown.

The normal position for the mechanism for permitting stone jumping is shown in Figure 2 and a bolt 30 may be inserted inthe bracket l5 across the slot, as shown, to retain the mechanism in this position, when it is not desired to make the stone jumping feature available for operation. Figure 1 shows the position of the stone jumping mechanism as one of the disks rides over a stone or other obstruction.

It will be observed that the normal tendency, when the machine rides over a stone or the like, is for the frame to tilt forwardly, and the weight of the rear wheel 6, which is on the axle some distance behind the frame, exerts, in the usual construction, considerable leverage holding the disks in the ground and provides a heavy weight to be lifted when clearing a stone. The stresses thus exerted strain the machine and tend to break or disfigure the disks.

In the present construction, with the bolt 30 removed, the machine has much greater flexibility, the socket bearingB and rear wheel accoutrements being free to pivot, allowing the main frame to rise and tilt forward as required when a stone is engaged, while the pin I6 slides in the elongated bearing in the bracket l5, free ing the main frame, as it rises, from the weight of the rear wheel. The machine buckles, as it were, about the pivot i3. The spring 22 cushions the joint and helps it to hinge as the ma- Thus, it will be observed, the hinge and the fiexibledraft hitch connection cooperate to provideiin the machine facility for stone jumping. 1 i

We claim:

1. An agricultural disk machine comprising in combination, a main frame member, a plurality of disk members'behind said main frame member,

an end frame member; a socket bearing pivoted to said end frame member, a rear wheel, an axle therefor one end of which engages said socket bearing, a rear wheel positioning device engaging said axle and pivotedto said socket'bearing, 'a bracket on said socket bearing having an elongated slot therein, and a rod pivoted to said positioning device'and having a bearing adjacent its upper end for sliding contact in said slot.

2. An agriculturaldiskmachine comprising in combination, a frame, a plurality of disk members connected thereto, a 'rear wheel assembly pivoted on a horizontal axis to one end of said frame including a rear wheel positioning device, a bracket tied to said'frame, an elongated slot in said bracket and a spring pressure control member for said positioning device having adjacent its upper end a bearing for sliding con tact in said elongated slot.

3. A disk machine as defined in claim 1, having draft hitch members pivotally connected to the main frame and to one another.

4. A disk machine comprising in combination a frame, disks connected to said frame, an end frame member extending rearwardly, a rear wheel assembly pivoted to said end frame member, and a spring pressure control member for said rear wheel assembly the upper end of which is mounted for forward and backward movement with respect to the main frame.

5. In a disk machine of, the character described, a main frame, a rear wheel assembly pivotally secured to the frame and including a rear wheel positioning device and a control member for said device and mechanism having engagement with said member whereby the rear wheel assembly may buckle with respect to the frame as the machine rides over a stone;

6. A disk machine as defined in claim 5, hav- 7 ing draft hitch members pivotally connected to the main frame.

7. In a. disk machine of the character described, a frame member, a rear wheel assembly pivotally secured to said frame member and including a rear wheel positioning device, and acontrol member for said device the upper end of which is mounted for forward and backward movement with respect to the frame member.

. 8. An agricultural disk machine comprising in.

spring pressure control member for said device.

the upper end of which is mounted for forward main frame.

JAMES CHAMBERS. ROSS EGO.

"and backward movement with respect to the

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