US1369033A - Road-grading machine - Google Patents

Description

J. R. KEY.

ROAD GRADING MACHINE.

APPLICATION FILED AUG-14.1919.

Patented Feb. 22,1921.

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UNITED STATES,

JOHN R. KEY, OF LEAVENWORTH, KANSAS.

ROAD-GRADING MACHINE.

Specification of Letters Patent.

Patented Feb. 22, 1921.

Application filed August 14, 1919. Serial No. 317,442.

To all whom it may concern Be it known that 1, JOHN R. KEY a citizen of the United States, residing at eavenworth, in the county of Leavenworth and State of Kansas, have invented certain new and useful Improvements in Road-Grading Machines, of which the following is a specification.

This invention relates to road grading machines of that class having the rear end of the frame laterally adjustable on the rear truck or axle and an adjustable blade carried by the frame, and means for manually adjusting the frame and blade independentl of each other.

ith all machines of the class above referred to as at present constructed, with which applicant is familiar, it is necessary when about to make a turn, to first raise the blade and then shift the rear end of the frame toward the rear wheel at the same side of the machine as the normally elevated end of the blade, which double action consumes considerable valuable time in the course of a days grading operations.

The object of my invention is to produce a construction whereby independent lifting adjustment of the blade and lateral shifting of the frame may take place, as customary, or both the lifting of the blade and the shifting of the frame may be accomplished simultaneously preliminary to making a turn, to reverse the course of travel.

With these objects in view the invention consists in certain novel and useful features of construction and organization of parts as hereinafter described and claimed; and in order that it may be fully understood, reference is to be had to the accompanying drawing, in which:

Figure 1, is a fragmental plan view of the rear end of a road grading machine of well known construction and operation, and belonging to the class mentioned, provided with mechanism embodying the invention.

Fig. 2, is a section on the line 11-11 of Fi 1.

ig. 3, is a rear view of the right hand rear corner of the machine.

Referring to the drawing in detail, 1 in dicates the arched side bars of the frame of the machine, the rear ends of said bars being mounted in the customary or any preferred manner on the axle 2 of the rear wheels 3, the axle having pivotal adjustment so that it can be disposed obliquely at a slight angle to the line of draft, the obect of this adjustment being to dispose the rear wheel at the ditch or cutting side of the machine ahead or back of the other wheel as by so doing there is less tendency for the former to climb out of the ditch. The axle is usually so set when making what 15 known as the first or heavy cut in the road grading operation. For the subsequent or lighter cuts the axle is usually straightened, that is set at right angles to the line of travel. Mounted upon the rear ends of the sides 1 and constituting a part of the frame, is a slatted platform 4 equipped with a seat 5 for the person in control of the grading machine.

For adjusting the axle pivotally a bracket {5 15 mounted on the platform and forms a ournal for a vertical shaft 7 equipped with a pinion S meshing with a segmental rack 9 standing concentrically of the pivotal int of the axle, which is at the opposite si e of the platform, but not detailed. The shaft 7 1s equlpped at its upper end with a worm wheel 9 meshing with a worm 10 on a hOrizontal shaft 11 journaled in the bracket 6 and provided at the inner end of the same with a hand wheel 12, rotation of which causes the pinion to travel on the worm and impart endwise movement to the rack 9 and h e nce pivotal movement to the axle.

At the opposite side of the platform is mounted a bracket 13 forming a journal for a vertical shaft 14 geared by a pinion 14 in the customary manner as shown, to the rack bar 15 on the axle, a suitable keeper 15 inclosing the axle below the platform so as to hold the rack bar in engagement with the said pinion without interferin with longitudinal adjustment of the ax e or ivotal movement thereof around the axis of shaft 14. Shaft 14 is equipped at its upper end with a worm wheel 16 meshing with a worm 17 secured in the bracket 13 on a, shaft 18 journaled in said bracket and equip at its inner end with a hand wheel 19, t e operation of which through the mechanism described effects lateral adjustment of the platform upon the axle toward or from either of the carrying wheels 3.

20 is a circle frame customary in road grading machines for supporting and providing for pivotal adjustment of the scraper blade 21. The mechanism to eflect pivotal adjustment of the blade around the circle frame is omitted with the exception of the operating shaft 22 in Fig. 1.

F or raising and lowering the blade or ti1t-' ing the same so as to depress a particular end thereof there is a left hand shaft 23 and a right hand shaft 24, said shafts being journaled at their rear ends in similar brackets 25 mounted on the corresponding sides 1 of the frame and equipped at their rear ends with worm wheels 26 meshing with worms 27 on short shafts 28 equipped with large hand wheels 29, the operation of which through the shaft 23 or 2 1 and other mechanism not shown or described as forming no part of the subject matter of this invention, effects adjustment of the corresponding ends of the blade.

In the practical operation of a large road grading machine of the class under consideration two or more cuts are ordinarily made in grading one side of a road, the axle being angled to advance the ditch wheel so that it shall not ride out of the ditch produced by the depressed end of the blade. On the ensuing or second cut the axle is straightened and the depressed end of the blade is more or less raised. At the end of the first cut which may be of the length of the road being graded between intersecting roads,'the machine must be turned so as to operate on the other side of the road during the reverse travel of the machine.

is consumed not only in connection with the engine, but because the operator must first necessary to operate wheel 12 as well as wheel 19.

To obviate this double operation, that is to avoid the necessity of operating wheel 19 as well as wheels 29, shafts 18 and 11 are each provided at their innerend with a bevel gear 30 meshing with a bevel gear 31' ona suitably journaled longitudinal shaft 32 equipped at its rear end with a bevel gear 33' meshing with a bevel gear 34; on the inner end of the corresponding shaft 28.

clutch members 35 normally engaged by clutchmembers 36 keyed to slide upon and turn with shafts 32 as customary, and held by springs 37 normally in engagement with clutch members 35. Levers 38 suitably mounted engage the clutch members 36, and

suitable latch mechanism, not shown, be-

cause of common and well known construction, is employed for normally holding" clutchniembers 36 out of engagement with clutch members 35, so that operation of' the To make this turn 7 with the ordinary machlne considerable tune desired, however, the latch mechanisms or 1 levers 38 or either of them may be tripped to permit clutch member or clutch members 36 to be forced into engagementwith the respective clutch members 35, so that theoperator by turning the wheels 29 one at a time, to raise the blade, can incidentally straighten the axle if angled and effect the lateral'adjustment of the rear end of the frame. the axle is not angled the clutch members related to the mechanism affecting the pivotal control of the axle, will be disengaged so that the operation of the right hand wheel 29 will have no efi'ect on the axle.

It will thus be seen that the mechanism shown enables the person in control to make the necessary adjustmentpreliminary to turning the machine, without manipulating the wheels 12 and 19 or either of them, ex cept as they are operated through the power transmission gearing between the worms.

From the above description it will be apparent that I have produced a road grading machine possessing the desirable features of advantage pointed out as desirable, and I reserve the right to all changes properly falling within the spirit and scope of the appended claims and the principle'of construction involved.

This case is a'continuation in partjonly of i applicants allowed application forpatent V for road grader, filed August 15, 1917, Serial Number 186,4:09,

I claim:

1. in a road grading machine, a frame, a V

wheeled. axle supporting the rear end of the frame and endwise adjustable transversely of and pivotally related to the axle, manually-operable means for pivotally operating the axle, a scraper blade, a manually-operable shaft for lifting and lowering one end V of said blade, and means for transmitting power between said shaft and axle-operating means. I

2. in a road grading machine, a frame, a wheeled axle supporting the rear end of the frame and pivotally related thereto, manually-operable means for pivotally operating the axle a scraper blade, a manually-oper- The bevel gears 31 are equipped with able shaft for lifting andlowering one end 3. In a road grading machine, a framepa r wheeled axle supporting the rear end of the j of said blade, means for transmitting power frame and having endwise adjustment rela tive thereto and laterally thereof, manually- V operable means for effecting such relative adjustment between the frame and'axle, a

scraper blade, a manually-operableshaft for lifting and lowering one end of the said blade, and means for transmitting power between said shaft and axle operating means.

4. In a road grading machine, a frame a wheeled axle supporting the rear end of t e frame and having endwise adjustment relative thereto and laterally thereof, manuallyoperable means for effecting such relative adjustment between the frame and axle, a

and clutch mechanism for transmitting ,15

power between said axle and axle-operating means.

In testimony whereof I aflix my signature.

JOHN R. KEY.

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