US1095824A - Plow-lift. - Google Patents

Description

J. M. DENNING.

PLOW LIFT.

APPLICATION FILED OCT. 3. 1912.

4 SHEETS-SHEET 1.

J. M. DENNING.

\ PLOW 1.1m

APPLICATION libill: OUT.

Patented May 5, 1914.

4 SHEETS-532! 1% G i a ans:

c o a J. M. DENNING.

PLOW LIFT.

APPLI GATION FILED OCT. 3. 1912.

LGQEZSZQ v Patented May 5, 1914.

4 SHEETSSHEET 3.

Wit 2']? 6365 6. S 1711 6 72-60 7" y 56 WNW 119222? 27 9' J. M. DENNING.

PLOW LIFT.

AYILIOA'HON 7mm 0013,1912.

1,095,824. Pa ented Mayfi. 1,914.

*1 SHEETS-SHEET 4.

' position.

JOSEPH M. DENN ING, OF DENVER, COLORADO.

PLOWLIFT.

Specification of Letters Patent.

Patented May 5, 1914.

Application filed October 3, 1912. Serial No. 723,801.

To all whom it may concern: Be it known that I, JOSEPH M. 'DENNING, a citizen of the. United States, residing at Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvements in Plow-Lifts, of which the following is a specification.

The present invention relates to a means for raising the plow bodies out of plowing position and lowering the same into plowing The objects of the present invention are to .provide a single crankfor actuating said plow lift.; to so arrange the parts as to have the plow enter the ground point down; to throw the point of connection between the crank and the parts connecting the crank with the plow body, past the center of movement of the crank, when the crank is fully thrown to raised position; whereby the plow is locked in raised position; to provide a level-attached to the front end of the plow beam, to provide a shiftable fulcrum for this lever; and to provide a connection between the lever and the crank and to provide means for adj usting this connection.

The invention further consists in the features of construction and combination of parts hereinafter described and claimed.

In the drawings, Figure 1 is a side elevation of a traction plow equipped with the mechanism of the present invention and with the engine or propeller removed; F ig. 2 a .plan view of the part shown in Fig. 1; Fig. 3 a detail of the plow lifting mechanism showing the plow in lowered position; Fig. 4 a view similar to Fig. 3 showing the plow raised; Fig.5 a section on line-55 of Fig. 2, looking in the direction of the arrows; and Fig. 6 a detail of the mechanism for leveling the frame.

The plow lift for illustrative purposes only is shown with a traction plow comprising side rails 7 and 8 joined together by a front rail 9. a'rear rail 10, and lying between the side rails and extending from the front rail to the rear rail is an intermediate rail '11, all of the rails being preferably of tubular formation which is of a nature to give strength and durability to the frame-work without making the weight of thc'implement of undue proportions. .Tournaled upon the framework is a'traction wheel 12, 91 suitable size and formation which is driven by a motor, not shown, through the instrumentalities of suitable gearing 135' Attached to the side rail 8, as best shown in Figs. 1 and 2, is a frame 14, which constitutes a carrying frame for an auxiliary wheel 15 lying approximately opposite the traction wheel. This auxiliary wheel serves as an added bearing for the rear end of the frame, so that when the device is working upon a hillside, the tendency of the rear end to tip will be overcome. The auxiliary wheel is raised and lowered through t e medium of a lever and segment mechanis 1 16, to the lever of which is connected a crank arm 17 which in turn is. joined to a linkor bar 18, connected at its rear end to the upper end of the frame 14. The connection .between the link and frame is of the slot and pin variety, so that a certain amount of play is permitted between these two parts, and bearing against thelink and the upper end of the frame 14 is a spring 19 which tends to resist relative movement between the link and frame, and forms in effect a resilient connection between the frame and link. Should the wheel 15 be lifted, the frame 14 would swing around its pivotal center, and the upper end would be forced against the spring 19, and owing to the slot and pin connection between the frame and link or bar the movementof the frame would not disturb the position of the link, and hence the movement due to the rising of the auxiliary wheel would not be communicated to thesupporting frame of the machine. Should the front wheels be lifted from the ground. by striking anjobstacle the auxiliary wheel would not be affected thereby and would provide an added support so that the frame would not tip over.

Should it be desired, however, to adjust'the height of the wheel 15, the lever, after'a predetermined movement, would sufficiently compress the spring 19, so as to force the frame 1 1 and the wheel 15 downward in accordance wit he rearward movement of the link 18, and if a raising of the wheel 15 were desired the lever, when moved in the opposite direction, would pull the linkforward, and inasmuch as the pin is normally resting against the rear end of the slot said forward movement would pull the frame 14 upward, and raise the wheel 15.

These movements, of course, if desired, could be utilized for leveling the rear end of the frame since pressure when'brought to bear upon the wheel 15 when it was resting upon the ground would not disturb the position of the wheel but would efi'ect a tilting and leveling of the frame. This fact is-well ,lw'ibwn to those acquainted with the plow art.

The implement is provided at the front end thereof with suitable steering wheels 20, each of which, in the construction shown as best illustrated in Fig. 5, is provided with a trunnion which terminates at its inner end in a block or head 21, through which passes a vertically extending pivot pin 22, which also passes through ears 23 secured to the outer ends of the front axle 24, each of the steering wheels, as shown, being provided with a circumferential rib or flange '25 to better insure its grip, upon the ground. The

axle 24 has secured thereto anupwardly extending'lug 26 pivotally secured to a lug 27 depending from the front rail 9. This pivotal connection permits of an upand down tilting of the axle in accordance with the movement of the wheel over the ground,

arid this pivot orgie provides the center of movement when an adjustment or leveling 'ofthe frame is desired. The mechanism shown. for effecting this adjustment consists of a link 28 secured to an car 29 attached to a portion ofthe axle 24. The link in turn is pivotally connected to a pivoted arm 30 having pivotally attached to its upper enda sleeve 31 provided with an interior thread, and extendingthrough this sleeve 31 is a threaded stem 32 having a bearing in a; sleeve 33 secured to a suitable support 34 attached to the side rail 7. The stem 32 is provided with a suitable handle 35 for rot-ating the same. The action of this mechanism will be obvious from the description: Ro-

cation of the handle 35 in the direction desired rotates the stem. 32, moves the sleeve 31 along saidstem, moves the crank arm 30 up or down about its center, raises orlowers the I link 28 and efiects the proper leveling of the frame, by reason of the fact that the wheels 25 are resting upon the ground and will not be affected by the movements of the leveling mechanism. Of course, should one or the other of the wheels be upon arhigher plane the lowering of one of the wheels would take place when the rod 32 was properly turned.

The means illustrated for effecting a steer ing of the wheels 25 consists of a steering rod 36 provided with the and terminating in its lower end in aworm surface 37, about which is wrapped a cable 38 connected to each of the blocks 21 of the trunnions of the wheel.

It is, of course, necessary to provide some suitable means for raising and lowering the plow body to raise the plow clear from the ground when the implement is transported from place to place. .After the plow has been lifted from the ground and is again lowered into plowing position, it is highly attached usual hand-wheel I noeagsaa' I desirable that the front or point of plow strike thc'ground first, as in this position, it will more easil be dragged into preper plowing position the forward movement of the implement. The mechanism shown for efliecting the-raising and lowering of the plow consists of-a. crank journaled in suitable bearings 4O attached to the rails 7 and 11.. The crankis actuated by a lever 41 which is locked in position to hold the plow raised throughthe instrumentalities of a dctent adapted to engage with a. tooth of a segment 42'. Attached-to the rear portion of the crank .43 is a link 44,-which is secured by suitable means to the rear portion of the.

plow 45, and attached to an arm46-of the crank at a point intermediate the center of movement of 'the crank and the arm.43-

thereof is a clip or ear 47, to the upper end of which is pivotally secured one end of aa link or bar 48.

The other end of the link or bar is secured to the upper portion of a plate 49 which in this lever is pivotedat 50 to a member 50 which member is slidably mounted on a rod Themember 50" furnishes what may be termed ashift-able fulcrum for the lever 49. I

The rod 53 is attached at one end to a member 50, which member pivotally secured to'a stem 50,which stem in turn attached to a plate, 51 securedgto the front rail 9 of the supporting fra e. Pivotally to the lower portion of said plate or lever 49 is the front end of the plow beann52, and the rod 53'is pivotally confact is a bell crank lever;

nected at its-other end to said plow. beam.

The action of this portion of the de'vicewill probably be best understood .by referring to Figs. 3 and 4t the-normal position being shown in Fig. 3, and as will be there seen, the crank 9 is normally lying in a substantially hori ontal plane. As the lever 41 is turned to swing the crank upward the link 44 will be swung upward carrying with it the rear end of the plow, and the clip 47 will be pushed upward and forward forcing the link48 forward, swinging the plate or crank 49 u'pward,'and carrying the forward end of the plow ,beam 52 upward. Owing to the fact that the clip 47 is located closer to the center of movement of the crank than the link 44, said link will, upon initial movement of the crank, travel a greater distance than the clip 47, and at the commencement of the plow lifting operation the rearend of the plow will be carried up faster than the front end: When, however, the link 47 has crossed the center of movemnt of the crank 3 upward movement of the link 44 and the rear end of the plow will cease andv the link 44 will begin to descend and. lower the rear end. This will occur during the lat- I the crank is reached a relatively short time after the link .44 has reached its highest tween said mem point, but the movement after the link has passed the center is sufiicient to allow a continued raising of the front end of the plow beam, while the rear of the plow is being lowered, so that when the parts finally reachv the final position, the low is in a level or substantially level position. WVhen the descent of the plow takes place, there will be no movement downward of the rear end until the crank at has fallen back past the axial center of the crank 39, and henceflon the initial return movement of the crank, the rear end will not descend, but will instead rise. The plate 49, however, will be pulled backward at the commencement of the movement of the crank, and, therefore,

- the front end of the plow'beam will be lowered at the commencement of said movement; thus when the rear end starts to be lowered, the plow will be at an angle so that the front end is pointing toward the ground, and the plow will enter the ground in this position. Then, as the machine is propelled forward, the drag. of the plow will pull the rear end downward and into plow ing position. An adjustment of the length of the link 48 is provided by forming a plurality of holes 56 at the front end of said link, the shortening or lengthening of this link regulating the depth to which the plow enters the ground.

I claim: I I 1. In a plow, the combination of a supporting frame a plow body, a crank on said frame, a member pivotally connected to the front end of the low body, a connection be her and crank, a movable rod, a slidable connection between said member and rod, aconnection between the rear end of the plow body and the crank, the connection between the rear end of the plow body and the crank and the connection between the pivoted member and the crank bein located at different points upon the cran: with respect to the center of movement thereof, substantially as described. 2. In a plow, the combination of a supporting frame, a plow body, a crank on said frame, a member pivotally connected to the front end of the plow body, a connection between said member and crank, a movable rod, a slidable connection between said member and rod, a connection between the rear end of the plow body and the crank, the connection between the rear end of the plow body and the crank and the connection between the pivoted member and the crank being located at dill'erent points upon the crankwith respect to the center of movement thereof, and means for adjusting the length of the connection between the crank otally connected to the front end of the plow 7 body, a crank carried by the frame, a ton nection between said pivoted member and crank, a rod pivoted to the plow beam and to the forward end of the supporting frame, a slidable connection between said pi 'Iittl member and rod, a connection betwerr the rear end of the plow body and the zmh, said connection from the. pivoted rmmher and said connection from the rear end of the plow body being located at different points upon the crank with respect to the (cuter of movement thereof, substantially as described.

at. In a plow, the combination of a supporting frame, a plow body, a member pivotally connected to the forward end of the plow beam, a swinging rod, a slidable connection between said pivoted member and rod, a crank mounted on said frame, a lug on the crank, a link pivotally connected at one end to said member and pivotally connected at the other end to said lug and a connection between said crank and the rear end of the plow body, substantially as described.

5. In a plow, the combination of a supporting frame, a plow body, a crank on said frame, a connection between said crank and the forward end of the plow body, a member directly connecting the crank and'the rear end of the plow body, the point of connection between the crank and the forward end of the plow being-located closer to the center of movement of the crank than thepoint of connection between the crank and the member connecting the crank with the rear end of the plow body and both points of connections swinging past the center of movement of the crank when the crank is fully swung substantially as described.

6. In a pl porting frame, a plow body, a crank on said frame, a connection between said crank and ow, the combination of a s'upforwardend of theplow, means for directly connecting the crank and the rear end of the plow, the point of connection between the crank and the forward end of the. plow being located closer to the center of movement of the crank than the connection between the crank and the connecting means to the rear end of the plow, both of said points of 2 connections swinging past the center of movement of the crank when the crank is fully swung and means for adjusting the length of the connection between the crank and the front end of the plow, substantially as described.

7. In a plow,='tl1e combination of a supporting frame, a-plow body, a lever pivotally connected to the front end of the plow,

a shiftable fulcrum for said lever, a crank, a

connection between said lever and the crank and a connection between the rear end of the plow and the crank, substantially as tlescribed. v 1 8. in a plow. lhc conihination'of a supporling :lra1n15,'a plow body, a lover pivotally connected to the front end of'tlie plow, a ehiftahle fnlci'llin tor said lei'cr, a crank, a connection hclnvcenythe lover and crank,

10 a connection between the rear end of the, plow and the crzmk and means for ad usting lthe'length of the connection between the crank and the lover, substantially as described.

15 9. In a plow,- the coi'n'hination of a supat its other end directly to the rear end of the plow body, substantially as described. 25

v JOSEPH M. DENNING, lvitnesseez v i l J. L. MA'rrsoN, N. J. TUB-rpm.

Images