US1684302A - Bolster - Google Patents

Description

Sept. 11 1928.

F. E, RNDT Filed 001;. 25, 1927 Patented Sept. 11, 1928.

UNITED STATES res n PATENT. GFFICB.

FRANKLIN E. ARNDT, OF GALION, OHIO, ASSIGIIOR TO THE GALION IRON WORKS MFG. CO., 015 GALION, OHIO, A CORPORATION OF OHIO.

BOLSTER.

Application filed October 25, 1927. Serial No. 228,675.

This invention relates to bolsters, and particularly to a front axle bolster for a road grader of the type in which the frame bars are supported at their rear ends upon a tractor unit which propels the machine, the tractor and all of the operating mechanism of the grader being under the control of a single operator, although it is to be understood that the invention is not limitedin this'regard but is of more general application.

The invention has for its primary object an improved construction of front axle bolwill be in all'positions of the axle held central or at the middle thereof, and all undue twisting strains upon the parts being avoided.

With this and other objects in view, as will more fully appear as the description procoeds, reference is to be had to the following description and accompanying drawings, in which 7 I Figure 1 is a vertical longitudinal. section of the forward end of a grader embodying my improved bolster.

Fig. 2 is a transverse vertical section on the line 2-2 of Fig. 1, and

Fig. 3, is a top plan view of the bolster.

Referring to the drawing, the numeral 1 designates the front axle of a road grader, and 2 the front wheels thereof. 3 designates generally my improved front axle bolster. This bolster is in the form of a casting embodying a forwardly inclined front wall or plate 4, the upper portion of which is defined at its sides by upwardly and rearwardly inclined vertically disposed and longitudinally extending wings 5, to the outer faces ofwhich the forward ends of the channeled frame beams 6 are bolted, as best. illustrated in Fig. 2, the upper edges of the side wings 5 being depressed slightly below the upper edge of the face plate 4, as indicated at 7, to accommodate a transversely extending top plate 8 riveted at its ends to the upper flanges of the channeled beams 6 having its front edge extending preferably flush with the upper edge of the face plate 4,

Defining the lower portions of the side wings 5 the bolster is provided with a transversely extending web 9 which is formed at its middle with an upstanding boss 10 having an opening 11 extending therethrough, the transversely extending top plate 8 being formed with a correspondingopening 12, and a bolt 13 extends through the openings 12 and 11, being preferably held therein by means of cotter pins, as shown, this bolt and the boss 10 serving as the pivot point for the forward ends of the draw bars 14 which carry the circle and mold board of the grader and which are preferably connected at their f0rward ends to a coupling head 15 resting at its lower side upon the boss 10 and formed with a pivot opening to receive the plvot bolt 13 above mentioned.-

At its lower end the bolster 3 is formed with front and rear depending skirt portions 16 which are preferably downwardly beveled towards their lower edges, as indicated at'17. and which extend transversely,'as shown, in spaced relation to each other receiving between them the axle 1 as clearly shown in the drawings, these skirt portions being joined at their ends and upper portions by downwardly facing shoulders 18 disposed in the san'iehorizontal plane and adapted to rest firmly upon the top of the axle 1 in the normal horizontal position of the latter. Preferably these shouldered portions 18 are strengthened by means of upwardly extending webs 19, as shown.

The skirt portions 16 of the bolster, which embrace between the axle 1, are formed at their middle portions with vertically elongated slots 20, the slots of the two skirt portions registering, as shown, and these two slots 20 are designed to receive and accommodate a pin 21 which is mounted for free movement therein and which is preferably held in place solely by means of retaining plates 22 preferably bolted to the skirt portions 16, as clearly illustrated in the drawings, the pin 21 passing through an opening formed for it in the axle 1 and carried thereby. I

Preferably the face plate 4 of the bolster is formed with openings 23 to receive the ends of a coupling link 24 held in place by belts or similar fastening devices.

Hill

In the operation of the bolster, it is manifest that so long asthe grader, for example, is traveling along a comparatively even road, the shouldered portions 18 thereof will rest solidly and fiat upon the upper edgeof the front axle and all chattering will be avoided.

When the grader is thrown to an extreme position, as for instance, when it is run up on a bank or down into a ditch, obviously the axle has room to flex by means of the vertically elongated slots 20 and. the pin 21 moving therein, while at the same time the pin will keep the bolster 'centralrelative to the axle in all positions of the latter.

While the accompanying drawing illustrateswhat I believe to be the preferred embodiment of my invention, it is to be understood that the invention isnot limited thereto, but that various changes may be made in the construction'and arrangement and proportions of the parts without departing from the scope of the invention as claimed.

What is claimed, is:

.1; In an implement'of the character described, frame bars, a front axle, and a bolster adapted to support the forward end of the frame bars upon and above said axle, said bolster being formed with a. forwardly inclined face plate provided at its side portions with rearwardly extending wings to which the forward ends of the frame bars are fastened, said bolster being also provided with downwardly projecting skirt portions spaced longitudinally one from the other and embracing the axle between them, said skirt portions being respectively formed with 1ongitudinally disposed slots, a. pin carried by the axle and movable at its ends freely in said slots, and means for retaining said pin in said slots, the bolster being also provided at the ends of and oining the skirt portions together with downwardly facing shoulders adapted to rest upon the top of the-axle.

2. In an implement of the character described, frame bars, a front axle, and a bolster adapted to support the forward end of the frame bars upon and above said axle, said bolster being formed with a forwardly inclined face plate provided at its side portions gether with downwardly facing shoulders adapted to rest upon the top of the axle, the bolster being further provided with vertically disposed strengthening webs oining the shouldered portions to the lower sides of the side wings.

3. In a road grader, frame bars, draw bars, a front axle, and a bolster adapted to support the frame bars and draw bars above and from the front axle, said bolster being formed with a forwardly inclined face plate, With side wings extending rearwardly from the upper portion of the face plate and slightly depressed attheir upper ed es below the upper edge of thefaoe plate, tie front ends of the frame bars being fastened to said side wings, a transversely extending top plate secured to the frame bars. at the front ends thereof and having its front edge extending flush with the top edge of the face plate, the bolster being further provided with a. transverse web formed on its upper surface with an upstanding boss having an opening therein, and the top plate being formed with a corresponding opening, a pivot pin held in said openings and with which the draw-bars have a pivotal connection at their front ends, the bolster being also provided with downwardly projecting skirt portions having shoulders at their ends adapted to rest on the to ofthe axle, and having between said 'shoulc ers vertically elongated slots, a pin moavble freely in said slots and carried bythe axle, and cover plates secured to the depending skirt portions over the slots and adapted to retain said pin in place.

In testimony whereof I a-ffix my signature.

FRANKLIN E. ARNDT.

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