US1396500A - Drawbar - Google Patents

Description

N. C. BEMENT.

DRAWBAR.

APPLICATION men NOV-15,!920.

1,396,500. Patented Nov. 8, 1921.

' 4M @QWM $41M v NAHUM C. IBEMENT, OF ROCKFORD, ILLINOIS.

DRAWBAB.

Specification of Letters Patent.

Patented Nov. 8, 1921.

Application filed November 15, 1920. Serial No. 424,046.

To all whom it may concern:

Be it known that I. NAHUM C. ldmmn'r, a citizen of the United States. residing at Rockford, Winnebago county, Illinois, have invented certain new and useful Improvements in Drawbars, of which the following, taken in connection with the drawings, is a description.

My invention-has for its object the pro duction of a draw bar designed more particularly to be used in connection with vehicles, such as farm tractors.

One of the objects of my invention 1s to provide a draw bar which shall be automatically adjustable to the different heights or levels of the machine or vehicle when traveling over an uneven surface.

Another object of my invention is to provide a draw bar which shall absorb the shock when the machine encounters an obstruction and prevent as far as possible the transmission of the shock to the engine of the machine.

This I accomplish by the provision of springs whereby the horse power draw bar pull will be on the springs.

Another object of my invention is to produce a flexible draw bar which will automatically accomplish the above object, one which is always sure in its action and one which is positioned with respect to its action in connection with the frame of the vehicle to equalize the strain and pull of the propelling force, no matter whether the machine is traveling over a rough or smooth surface.

A further object of my invention is to provide an end spring draw bar which will eliminate the dead pull on starting the machine.

It is also an object of my invention to provide a draw bar which will greatly increase the serviceabilty of the vehicle by relieving it of a great portion of the tearing and straining effect customary with machines of this class, thereby greatly enhancing its usefulness.

A further object of my invention is to provide a draw bar so constructed that the two ends thereof are movably secured to the sides of the vehicle frame forward of the traction wheels. By this means the strain of draw bar pull is at all times upon the two side members of the vehicle frame, thereby securing greater traction than is possible with the draw bar having but a. single point of attachment and that at the center of the rear of the machine as has heretofore been the case.

I In the accompanying drawings I have illustrated what I now consider the preferred form of an embodiment of my construction which consists in the combination of an arrangement of parts hereinafter more fully described and claimed, it being understood of course that certain changes may be made with respect to size, proportion and minor details without departing from the spirit of or sacrificing any of the advantages of my invention.

In these drawings,

Figure 1 is a side elevation of a vehicle frame illustrating the position of attachment of a draw bar with respect to said frame,

Fig. 2 is an enlarged side elevation of one side of my draw bar and Fig. 3 is a top plan view of the same.

Referring to the drawings 4, 4, illustrates the side channels of a tractor frame to which this mechanism is attached. Secured near the rear ends of said channels are opposite ends of a supporting frame member 5 which depends therefrom approximately 12 to inches. and extends transversely of the vehicle frame, between which frame member and the vehicle body my draw bar operates.

6 and 7 are parallel bars, each having one end thereof, 8 and 9 bent at approximately right angles thereto, and attached at the ends by bolts. 10, or otherwise to the side channels 4, 4, of the vehicle.

The point of attachment of these bars is found most expedient in practice to beat the rear of a line extending transversely of the center of the vehicle body as shown more clear y in Fig. 1.

The outwardly extending free ends of the bars 6 and 7, normally rest upon the transversely extending supporting frame 5.

1 represents the end frame of my draw bar, which is positioned transversely of the channels 4, 4, the ends 12, 12, thereof being bent at an angle thereto, extending parallel to the side members 6 and 7 and inclosing the ends 18 of said bars 6 and 7, to which they are securely attached by rivets or other- Wise, aS shown. The frame formed by the side members 6 and 7 and the end member 11 may if desired, be formed of one continuous piece, but I have found it more expedient to construct it of the three pieces shown.

The draw bar frame as completed is U-- shaped, the ends of the frame being bent at an angle as shown.

Extending through the end frame 11 at either side of the center thereof are the draft beams 14:, 14 which are ositioned above the supporting frame 5. upported upon'these beams 14:, inside of the frame formed by the end member 11 and the side members 6 and 7, are the draw bar springs 15, 15, one end of which seats against the frame member 11 and the opposite ends thereof against a plate 16 held on said beam by the bolts 17, 17.

18, 18 are clevises which are attached by bolts to the outer ends of the beams 14, 14, and which are by the links 19, 19, attached to clevises 20, 20, which in turn have engagement with the whiflletree 21. The whiflletree 21 is provided with a plurality of. perforations 22, to which may be adjustably secured any farm implement such as a plow, harrow or the like.

Any pull on the draw bar, which in this instance is formed by the beams 14, supporting the springs 15 which are maintained within the frame formed by the side members 6 and 7 and the end frame 11, is immediately transmitted through the beams 14, the plate 16 to the springs 15 and against the end 11 of the draw bar frame, and through said frame to the connections 10 with the channels 4:, 4, of the vehicle frame. The side members 6 and 7 which are movably attached to the channels 1, 4, will accommodate themselves to any roughness or unevenness by a vertical movement of the end frame between the vehicle frame and the transversely extending supportingmember 5, a distance of 12 inches more or less.

The normal pull on the draw bar attached to the channel l, 4, tends to draw the body of the vehicle downwardly, placing the full weightand force of the pull upon the wheels of the vehicle which insures a better and more even of surface.

I claim:

1. A draw bar for vehicles comprising a U shaped frame member, having the ends thereof bent upwardly at an angle to the sides, means for upwardly bent ends of the draw bar to the vehicle frame at the sides thereof between the traction wheels of the vehicle, and draft beams and draw springs supported on said frame.

2. A draw bar for vehicles comprising a U-shaped frame, the ends of said frame being bent upwardly at an angle and movably supported from the vehicle frame, draft beams extending through openings in the traction on any kind movably attaching said specification.

end of the aforesaid frame, and draw sprin s supported on said beams.

3. draw bar for vehicles, comprising a U shaped frame member, thereof bent at an angle to the side members, means for movably securing said end members to the vehicle frame, a frame extending transversely of the vehicle frame and supporting'the free end of the draw bar frame, draft beams extending through openings in the rear end of the frame member, draft springs supported on said beams and bearing against the inside of the U shaped member.

4. A draw bar for motor vehicles, comprising a U shaped frame member movably attached to the vehicle frame, draft beams extending through openings in the rear end of said frame, springs on said beams,said springs seating against the inside of the U shaped frame, plates bearing against said springs at the opposite end thereof, and attaching members connected with the free ends of the aforesaid draft beams inside the draw bar frame. 7

5. A draw bar for vehicles comprising a U shaped frame member, the ends of said frame member being bent upwardly-at an angle thereto having movable engagement with the vehicle body, a transversely exlending frame member supporting the vertically movable free end of the draw bar frame, draft beams extending through openings in the draw bar frame, draw springs mounted on said beams and bearing against the inside of the draw bar frame, and attaching members connected with the free ends of the aforesaid draft beams outside of the draw bar frame.

6. A draw bar for vehicles, comprising an elongated frame member extending parallel with the side channels of the vehicle body, means for movably attaching said frames to the side channels of the vehicle frame, a transversely extending frame member attached to the side channels of the vehicle frame and supporting the rear end of the draw bar frame, draft beams and draw springs supported thereon in said draw bar frame.

7. Adraw bar for vehicles comprising an elongated U shaped frame member extending parallel with the side channels of the vehicle body, the ends of said U shaped frame bent at an angle thereto, and movably attached to the side channels of the vehicle body, draft beams extending through openings in the free end of the draw bar and draw springs and end plates supported on' said frames. f

Intestimony whereof I have signed this NAHUM o. BEMENT.

having the ends

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