Патент USA US2392903код для вставки
Jan. 15, 1946. . D, cuRRiE - I 2,392,903 HITCH ATTACHMENT FOR TRACTORS Filed Oct. 15, 1944 2732 ' _ 56 u’\ 25\\ lgi).\\\‘ 20~g g} L” as r vINVENTOR , DONALD CURRIE 764 4“; . M444 , 2,392,903 Patented Jan. 15, 1946 UNITED STATES PATENT OFFICE 2,392,903 HITCH ATTACHMENT FOR TRACTORS Donald Currie, Odebolt, Iowa Application October 16, 1944, Serial No. 558,912 5 Claims. (CI. This invention relates generally to tractor hitches and in particular to a hitch attachment for a tractor provided with what is commonly re ferred to as the “Ferguson” system for connect ing farm implements with a tractor. In one form of the Ferguson system a trans verse draw bar is generally supported an appre ciable distance behind the tractor rear axle hous ing. As a result ‘when a farm implement is. hitched to the draw bar much difficulty is en countered in making turns at the end of a ?eld when working in plowed or loose ground due to the fact that the implement does not closely track behind the tractor. To overcome this difficulty hitch attachments have been provided for use 15 with the Ferguson system but these attachments generally are bulky, relatively complicated, and 280-3344) Pivotally supported at their rear ends on the draw bar l2 are a pair of brace bars IS, the for ward ends of which are pivoted at H to a rocker arm I8, which in turn is pivoted at l9 to the top side of the differential housing 9. A pair of upright lifting arms 2| have their lower ends piv otally connected at 22 to a corresponding one of the frame members ‘I, while the upper ends of the lifting arms 2| are operatively connected with a crank arm 23 rotatably supported in a portion 24 of the tractor frame. The crank arm 23 is operatively associated with lifting mechanism f. not shown) for raising and lowering the arms 2 I. In the use of the hitch attachment 5 of this invention the frame 8 is maintained stationary so that the lifting arms 2| constitute upright frame members. ~ not readily and easily assembled or removed from The hitch attachment comprises a transverse the tractor. member 26 having a pivot bolt 21 extended there It is an object of this invention, therefore, to 20 through at a position centrally between its ends. provide an improved tractor hitch. A pivoted lever arm 28 is pivoted on the bolt 21 A further object of this invention is to provide to the top side of the member 26 and is formed a hitch attachment which can be quickly and at one end with a handle 29 and at its opposite easily assembled on a tractor provided with the end with a cam portion 3|. When the lever arm Ferguson system. 26 28 is in a pivotally moved position normal to the A feature of this invention is found in the member 25, as shown in Fig. 1, its end portion provision of a hitch attachment which is capable 3| is extended forwardly of the member 26 for of being connected with a tractor without the a purpose which will appear later. The lever arm use of bolts, or the like, additional to those pro 28 is locked in its normal position by an eye pin 30 vided on the tractor. 32 receivable through an opening 33 formed in Further objects, features and advantages of the lever arm 28 at a position such that the pin this invention will become apparent from the fol is adjacent to the front surface ofthe member lowing description when taken in connection with 26 and in contact engagement with such surface. the accompanying drawing in which: In order to keep the pin-32 from becoming lost Fig. 1 is a fragmentary perspective view of the 35 there is provided a chain 36 attached at one end hitch attachment of this invention; to the eye portion of the pin 32, and at its oppo Fig. 2 is a sectional view as seen on the line site end to the lever arm 28 adjacent the cam 2-2 in Fig. l: and portion 3|. Fig. 3 is a perspective view showing the hitch A hitch bar 31 is pivotally connected at its attachment in assembly relation with a tractor. 40 forward'end with the pivot bolt 21 and to the Referring to Fig. 3 of the drawing the attach bottom side of the transverse member 26. An ment of this invention is indicated generally as upright inverted U-shaped bracket member 38 5 and shown in assembly relation with a frame carried adjacent the rear end of the hitch bar 6, supported on a tractor, and forming part of 31 rotatably supports a roller 39 in a spaced rela a usual Ferguson system. The frame 6 com 45 tion with the top side of the hitch bar 31. prises a pair of rearwardly extended diverging In the assembly of the hitch attachment 5 with arms ‘I having their front ends pivoted at 8 to the frame 6 the lever arm 28 is moved to its dotted opposite sides of a differential housing 9 consti line position shown in Fig.3 and the member 26 is tuting part of a rear axle housing I I. Connected laid across the top sides of the rearwardly ex between the rear ends of the members ‘I is a 50 tended frame members ‘I at a position forwardly draw bar l2 having reduced ends l3 extended of the upright arms or frame members 2|. The through the members ‘I. The draw bar I2 is member 26 is retained on the members 1 against maintained in an assembly relation with the longitudinal movement by a pin 4| spaced in members ‘I by a tapered keep l4 projected through wardly from each end of the member 26 and pro 65 jected downwardly therefrom. The pins 4| are the ends I3. 2 2,892,903 spaced adistance apart corresponding substan: tially to the distance between the frame mem bers ‘I at their Junction with the frame members bars, each of which 'islsupported at its lower end , on a corresponding-one of said divergingframe members and connected at its upper end to the 2| so as to be engageable with the inner‘sides of tractor above said axle housing, a draw bar ex; the frame members ‘I when the-member 28 is in tended between the rear ends of said diverging a moved position against the lower rear sides of frame members, a hitchattachment comprising a transverse member supported on said diverging the upright frame members 2!; ~frame members forwardly of said upright frame With the member 26 thus supported on the members, means retaining saiditransverse mem frame members 1 one ‘of the pins H is removed from the draw bar and the frame member ‘I corre 10' ber against movement laterally of said diverging frame members, means adjustably supported on sponding to such pin is sprung a distance away said transverse member and movable to engage from the corresponding end i3 of the draw bar II ment with said axle housing to hold said trans a distance sufficient to receive the bracket 88 verse member against the rear sides of said up therethrough. The free end ii of the draw bar I2 is then inserted within the bracket 38 between 15 right frame members, a hitch bar pivoted at its the roller 88 and the top side of the hitch bar 31. forward end on said transverse member for piv otal movement between said diverging frame The sprung frame member ‘I is then reassembled with the free end of the draw bar l2. The rear members, and means movably supporting said end of the hitch bar 3'! is thus movably supported, hitch bar adjacent its rear end on said draw bar. through the roller 39, for swinging movement lon 20 2. In combination, a tractor having an axle gitudinally of the draw bar l2 concurrently with housing, a frame supported on said tractor com prising a pair of rearwardly extended bars con being maintained in a plane substantially paral nected at their forward ends adjacent the lower lel with the plane of the draw bar. side of said housing, a pair of upright bars corre With the hitch bar 31 thus assembled with the draw bar I 2 the lever arm 28 is moved from its 25 sponding to said rearwardly extended bars con dotted line position shown in Fig. 3 to its full line nected at their upper ends to the tractor above said housing, a draw bar connected between the position, also shown in Fig. 3, normal to the trans rear ends of said rearwardly extended bars, a verse member 25. At this normal position of the _ lever arm 28 the cam portion 3| is in engagement ' hitch attachment including a transverse member with the rear side of the differential housing 9, 80 supported on said rearwardly extended bars for wardly of said upright bars, with the ends of said with the length of the lever arm between its pivot transverse member being engageable with the rear 21 and the cam portion 3| being such as to retain sides of said upright bars, means for holding said the member 26 against the rear sides of the up transverse member against movement laterally of right frame members 2! and against forward movement away from such position. The pin 32 85 said rearwardly extended bars, movable means on said transverse member having a portion movable is then dropped within the hole 33 to retain the into abutting engagement with the rear side of lever arm 28 against pivotal movement out of an said axle housing to hold said transverse member engaging position with the differential housing 9. against the rear sides of said upright bars, a hitch It is seen, therefore, that the hitch bar is pivot ally supported for swinging movement at a posi 40 bar pivoted adjacent its forward end on said transverse member, and means movably support tion adjacent the rear side of the axle housing I I ' ing said hitch bar adjacent its rear end on said and forwardly of the draw bar 12. By virtue of draw bar. this pivotal support of the hitch bar any farm implement connected therewith is capable of a 45 3. A hitch attachment for a tractor comprising a transverse frame member, a lateral projection proper tracking with the tractor when sharp or adjacent each end of said transverse frame mem close turns are to be negotiated. It is also appar ber, pivot means extended through said trans ent that to assemble the hitch attachment 5 with verse member intermediate the ends thereof, a the frame 8 it is only necessary to remove a single pin [4 to permit the insertion of the draw bar I! 60 hitch bar pivoted adjacent its forward end on said pivot means and to one side of said transverse within the bracket member 38 and that the re ' member, a lever arm pivoted on said pivot means moved pin is immediately replaced on completion at the opposite side of said transverse member, of this assembly. A complete assembly can thus said lever arm in one pivotally moved position be accomplished in the manner of a few minutes normal to said transverse member having one without the requirement for belts or nuts which 55 end thereof extended forwardly of said transverse might be readily lost or misplaced. member, and means for locking said lever arm From a consideration of the above description, against pivotal movement in said normal position. therefore, it is seen that the invention provides a ' 4. In combination, a tractor having an axle hitch attachment for tractors which is of a simple and inexpensive construction, easily and quickly housing, a frame supported on the tractor com prising a pair of rearwardly extended frame mem; bers connected at their forward ends adjacent the lower side of said‘ axle housing, an upright frame member carried on each said rearwardly ment connected therewith. Although the invention has been described with 65 extended frame members, a draw .bar connected between the rear ends of said rearwardly extended respect to a preferred embodiment thereof it is to frame members, a hitch attachment comprising be understood that it is not to be so limited since a transverse member supported on the tops of modi?cations and changes can be made therein said rearwardly extended frame members and which are within the full intended scope of this against the lower rear sides of said upright frame invention as defined by the appended claims. 70 members, means on said transverse member en I claim: gageable with certain ones of said frame members 1. In combination, ‘a tractor having an axle to retain said transverse member against longi housing, a frame supported on the tractor com attachable with a tractor with a minimum of effort and time, and capable of providing for a proper tracking with the tractor of a farm imple tudinal movement when it is against said upright prising a pair of rearwardly diverging frame members connected at then-‘forward ends with 78 frame members, means movably supported on said transverse member and movable into engagement said axle housing, a pair of upright frame mem 2,392,903 with said axle housing to hold said transverse member against said upright frame members, a hitch bar pivoted adjacent its forward end on said transverse member, and means movably sup_ porting the rear end of the hitch bar on said 3 forwardly of said upright frame members. and adapted to be moved to a position against the rear sides of said upright members, downward pro jections on said transverse member engageable with the inner sides of said rearwardly extended frame members to hold said transverse member 5. In combination, a tractor having an axle against longitudinal movement in said one posi housing, a frame supported on the housing com tion, a pivoted lever arm pivotally supported on prising a pair of rearwardly extended frame mem~ said transverse member having one end movable 'bers connected at their forward ends adjacent. the 10 into engagement with the rear side of said axle lower side of said axle housing, an upright frame housing to hold said transverse member against member on each said rearwardly extended frame forward movement in said one position, means for members connected at its upper end to the trac locking said pivoted lever arm against pivotal tor above said housing, a draw bar connected be movement in an engaged position with said axle tween the rear ends of said rearwardly extended housing, and a hitch bar pivoted at its forward frame members, a hitch attachment comprising end on said transverse member and having its a transverse member supported on the top sur rear end movably supported on said draw bar. faces of said rearwardly extended frame members draw bar. ‘ DONALD CURRIE.