US2276713A

US2276713A - Road roller

Info

Publication number: US2276713A
Application number: US324223A
Authority: US
Inventors: Bramble William Henry
Original assignee: AVELING BARFORD Ltd
Current assignee: AVELING BARFORD Ltd; AVELING-BARFORD Ltd
Priority date: 1939-03-18
Filing date: 1940-03-15
Publication date: 1942-03-17
Anticipated expiration: 1959-03-17

Description

W. H. BRAMBLE ROAD ROLLER `arch 17, 1942.

Filed March 15, 1940 2 Sheets-Sheet l March 17, 1942. w. H. BRAMBLE ROAD ROLLER 2 Sheets-Sheet 2 Filed March l5, 1940 Patented Mar. 17, 1942 Unirse sr'rs "orties ROAD ROLLER Application March 15, 1940, Serial No. 324,223 In Great Britain March 18, 1939 s claims.v (c1. sii-50) In order however that the roller may be capable of negotiating hills, that is to say, that the driving wheels should be capable of obtaining suliicient grip on the road surface to allow the machine to pass up inclines, it is necessary so to construct the machine that about two-thirds of the total weight thereof comes on the hind or driving wheels. In present day machines it has not been possible to combine this feature with even an approximate equality of unit pressure on the driving and steering wheels respectively. In *s other words with machines as at present constructed, uniform distribution of compressive power which is desirable for obtaining the smooth finish of a road, is not compatible with the best hill climbing ability.

The object of the present invention is to provide means whereby the distribution of weightv between the front and hind wheels may be varied at will without the necessity of attaching or detaching any ballast weights at the time the variation is desired.

According to this invention, in a road roller comprising a front roller unit, by which the roller is steered and hind driving rollers arranged on either side of the front roller unit, there is provided a ballast weight; which is movably suspended on the frame or chassis soas to be capable of adjustment from a position within the wheel or roller base to one which is in alignment with or beyond the hind axle and so arranged that its position can be variedA either automatically or through suitable mechanical means 4to obtain either an even distribution of weight upon the said Wheels or a greater or lesser weight upon the driving or steering wheels.

Preferably the ballast weight is mounted between the side members of the roller frame, and is capable of movement by means of a rope and rotatable drum mechanism means being provided for locking the weight in a predetermined position.

The ballast weight may be in a single piece or formed in several sections suitably secured together and may be mounted on wheels or rollers to reduce the elfort required to move the ballast weight.

The invention is illustrated in the accompanying drawings, as applied to a motor driven road roller, but it may be applicable to steam rollers.

Figure 1 shows in Vertical section the ballast CII ` by the main roller.

weight, mounted on the `side members of the roller frame, only a portion of the frame being shown.

Figure 2 is a plan View of the mechanism according to the inventiomFigure 3 being a vertical section on the line III-III Figure 2. Figure 4 is a detailed front elevational view of the bearing and bearing spindle for operating mechanical means for moving the weight, `and Y Figure 5 is a detailed side elevational View of the parts shown in Figure 4.

Referring to the drawings, the road roller comprises a chassis frame indicated generally at A having the usual front roller B and hind rollers C constituting the driving rollers and arranged to rotate in paths on either side of that followed The front roller B, by which the machine is steered is suspended from a subframe D itself mounted to oscillate about a fore and aft axis in a cradle E carried by the steering post F.

According to this invention aroad roller, such as described, is provided with a ballast weight l so that the distribution of the weight as between the front roller and hind driving rollers can be varied as required to suit conditions. The ballast weight l is adjustably carried on the chassis frame so as to be movable from a position Within the wheel base to one which may be immediately below and where it is in alignment with the hind roller axle. Preferably provision is made for the weight to be movable to a position beyond the hind axle. The channel section members 2 which form part of the chassis frame provide suitable guides or a trackway for the ballast weight. Attached to the members 2 are cover-plates for the protection of the engine and other parts. The ballast weight is, preferably as shown, supported on axles 3 provided with rollers 4 which run on the inturned flanges 5 of the beams 2.

Anchored to the weight I is a rope 6, e. g., a p y wire rope or cable which winds on a winding drum 'l carried on a spindle 8 capable of revolving in bearings ,9, I0, said spindle being rotated by means of an operating element comprising a crank handle Il which is remote from any of a number of different positions of the ballast component on .the trackway and which is hereshown The bearings 9, It, are respec- 4contracted and this is effected by aV clamping screw I2 by manipulation of which the split bearing lil can be contracted on to the spindle 8 and hold the spindle against rotation when the weight has been moved to the desired position, hence securing the weight. At the end of the roller frame remote from the rope drum, a pulley I3 is provided around which the rope passes to be anchored at this other end to the weight I.Y The.

pulley I3 is carried on an adjustable mounting I4 so that any slackness in the rope may be takeni fromV rattling owing to vibration when the roller is inr operation, the weight is provided atboth sides with inclined faces I5, adjustable screws Il being u up. In order to prevent the Weight I provided in the anges 5 of the roller frame so that when the weight is moved .to eitherend lof the roller frame the appropriate pair of screws A may be adjusted to bear on the inclined faces of moved towards the steering wheels,`equalising as far as possible the Weight per unit of width 4on the machine wheels, whilst when greater weight is needed on the driving Wheels, as for example when climbing hills or when. operating a scarier,y the ballastweight will be moved inthe frame towards the -driving wheels.

What I claim is:

l. `A roadroller, comprisingjincombination a.

frame, a frontsteeringroller component connected to the frame, a hind driving roller component connected to the frame the said frame being. formed` with guides extending `longitudinally of the roller, a ballast weight movably suppor-ted by said guides,v a cable connected tothe ballast weight, a rotatabledrum to which the cable ,.is.connected, meansto rotate the drum to move the ballast weight longitudinally to change the .distribution .of .weight on Athe two. roller com.Y ponents,,and..means. to lockY theA drum. against.

rotation. i

2..` A. road.-roller .comprising in. combination .a frame, a .frontsteering roller. component con.-

nectedfto the. frame, ahindidriving rollerY com-.-v

ponent .connected-Lto the .frame the said frame beingl formed. .with.guides.extending longitucli.

nally. of .the roller,aballastlweight movably supe ported Yby said. guidea. a. cable` ,connected .to the ballast Weight, ya rotatable 'drum..to., which. the.. cable is connected,.meansto rotate -the.drum. to movethe ballast weight longitudinally tochange the distribution of weight onthetworollercome,

ponents, and. means l tov lock the .weight .against v movement..

SIA road roller comprising in combination. a

frame a front steeringroller component. con.-YV

nected Ato the. frame, a hind driving. roller. come ponent connected to the frame the said,frame.be. ing formed with guidesextending longitudinally of the roller, a ballast weightmovably. supported, bysaidguides, va cablev connected to tneb'allast weight,` a rotatable'drum. to which the..cable'is connected, meansto rotate the drum tomove the. ballast weight'longitudinally to change the distribution of weight on the two roller com'- ponents, and means to'lock the weight'against movement, the said means comprising screw operated devices'to engage sloping faces formed on the Weight.

4. A road roller comprising a frame, a front rollen means supporting said front roller from the frame for steering movement, hind driving rollers, means supporting the said hind driving rollers Vfrom the frame and at each side of the frontv roller, a longitudinal guide on the frame and-extending from va position within the Wheel base of -the roller at least to one of alignment with, the hind rollers,l a ballast component which is movable on and supported by the guide, and meansto hold the component in a selected position on the guide.

5.`A road rollercomprising a frame, a front roller., means supporting said front roller. from the framefor steering-movement, hind lrdriving, rollers, means supportingthe said hind driving A;

rollers from the frame and at each side ofthe front rollers, a longitudinal guide on the frame.. and extending from a position within the Wheel.,

base of the roller-at least to one of .alignment with the hind roller, a ballast component which is movable on and supported by said guide, means operatively connected to said component and be-` ing adapted for manual operation for moving the component on said guide to Vary the distribution of vWeight on the front andl rear rollers, and means to secure the component in the position to which it is moved.

6. A road roller comprising'a frame, a front roller means, a hind roller means, means mounting'said front and hind roller means on the.

frame, said frame having a trackway extending fore and aft of the frame, a ballast component mounted for free fore-and-aft movement on the trackway; and means for shifting said component fore-and-aft on said trackway including an operating element remote from .said component in any of a number of different positions of the latter, and means extending longitudinally of said trackway and connectingsaid operating4 element to said component.

7. A road roller comprising a frame, a front roller means, a hind roller means, meansmounting said front and hind roller means on the frame, said frame having atrackway extending fore and aft of the frame, a ballast componentY mounted for free fore-andaft movement on the trackway, and means for shifting said compone.

ent fore-and-aft on said trackway including any operating element mounted on said vframe in Xed position longitudinally thereof, and a connection between said operating element andsaid com-- 8. A roadfroller comprisingga frame, afront roller means, a hind roller means, means mounting said front and hind roller means on the frame, said frame having a trackway extending fore and'aft of the frame, a ballast component mounted for free fore-and-aft movement on the trackway, and means for shifting said .component fore-and-afton saidtrackway including a winding member journaled on the frame, a pulleyjournaled on the frame Vand longitudinally spaced from said winding member, and. a cable connected to said component and being trained around said pulley and winding device.

WILLIAM HENRY BRAMBLE'L;