US2099590A - Road roller - Google Patents

Description

Nov .16, 1937. Y A. w. AlTKEN 2,099,590'

ROAD ROLLER Filed March 2; 1937 s Sheets-Sheet 1 A. W. AlTKEN Nov. 16, 1937. 1

ROAD ROLLER Filed March 2, 1937 3 Sheets-Sheet 2 A. W. AlTKEN ROAD ROLLER Nov. 16, 1937.

3 Sheets-Sheet 3 Filed March 2, 19 37 Patented Nov. 16; 1937 UNITED STATES PATENT OFFICE Application March 2, 1937, Serial- No. 128,661 I 12 Claims.

This invention isa novelimprovement in road rollers and like vehicles; and the principal object of the invention is to provide such vehicles with an auxiliary roll disposed intermediate the front 5 and rear rolls or wheels of the vehicle, and disposed slightly in advance of the center of gravity .of'thevehicle, with novel means for raising and lowering the auxiliary roll in a rectilinear path with respect to the road surface, whereby when 1 the intermediate roll is engaged with the road surface'substantial-ly the full weight of the vehicle will be exerted downwardly upon thei-ntermediate roll to roll or smooth any irregularities in the road surface. Y

A further object of the invention is to provide suchroad roller or vehicle with novel guide frames disposed at opposite sides thereof and rigidly fastened to the roller or vehicle frame, said guide frames having rectilinear guide slots therein sloping downwardly and rearwardly, and having blocks slidably mounted therein, said blocks carrying the ends of the fixed shaft on which the intermediate roll is rotatably mounted; fluid cylinders being provided mounted at opposite sides of the frame substantially in axial alignment with the axis of the guide slots, said cylinders-having pistons therein carrying piston rods having their outer lower ends pivotally con- 7 nected to a second shaft fixedly connected by journal castings to the upper ends of the blocks whereby-theblocks are caused tobe reciprocated in unison in the guide slots; means being provided for adjusting the connection between the journal castings with the blocks whereby the axis .35 0f the intermediate roll maybe initially adjusted into parallel relation with respect to the axis of the rear drive rolls or wheels; means also being provided at thelower ends of the guide slots for limiting thedownward movement of the blocks in the guide slotswherebywhen theintermediate roll is inlowermost orn operative 'positionathe lower periphery of the intermediate roll will lie in the plane tangent to the lower peripheries of hereinafter set forth. v

I will explain theinvention with reference to the accompanying drawings which illustrate one practical embodiment-thereof, to enable others 50 and. will summarize in the claims. the novel .features of vconstruction, and novel combinations of parts, for which protection is desired.

In said. drawings: r Fig. l isa side elevation of .a'conventional road familiar with the art to: adopt and use the-same;"

roller, showingmy novel intermediate roll :and mounting applied thereto together with the fluid cylinder operating mechanism, the intermediate roll being shown inlowermost or operative position. 5

Fig. 2 is a reduced top plan view of the road roller frame with engine or motor removed to expose the operating parts of the mounting.-

Fig. 3 is an enlarged side elevation of a portion of the frame showing more in detail-mynovel intermediate roll and the operating means, the roll being shown in raised position in full lines, and being indicated in lowermost or operative position in dotted lines.

Fig. 4 is a top plan view of the parts shown in 5 Fig. 3.

Fig. 5 is a reducedsection on the line 55, Fig. 3. V

Fig. 6 is a'section on the line 6-6, Fig. 3. l

The road roller shown is of conventional form, -2 having a single front roller A, mounted in a yoke B, swiveled in the trunnion casting C, the yoke being operated by suitable steering mechanism (not shown). A pair of side frames D are connected with the trunnion casting C, the' side ?'25 frames being arched. upwardly over the front roller A; Therear ends of the side frames Dare supported by rear wheels E disposed at opposite sides of theside frames and amotor F is mounted in the frame. The above parts are purely conventional, and form no part of my present invention. I

In order to provide headroomfor' the intermediate roller, the lower front portions of the side frames D are recessed as at D to a point135' side frames conforming with the contours thereof. 40 r,

Mounted in journals G in the channel irons G slightlyin advance of the center of gravity of the road roller is a shaft I carrying guidesZ disposed ,at opposite sides of the vehicle, said guides being substantially channel-shaped as shown in Fig. 6 .45 and having webs 211 on their upper faces culminating in a split bearing 21) mounted on the ends of shaft I, said guides having inwardly extending portions 20 at their lower ends adaptedto contact with the under sides of the channel irons G to which the extensions 20 are secured, as by rivets 2d as shown, shims 2e if desired being inserted between the extensions 20 and channels G in order to properly align the axes of the channelsof the guides whenassembling the parts. The guides 2 in Fig. 6, the upper and lower faces of blocks-mak are thus rigidly secured to the frames D, the same being non-rotatably mounted on shaft I byhavdisposed in the same plane, said axes slopir'ig downwardly and rearwardlyof the machine as:

shown.

Slidably mounted within the gui-desare blocks 4, preferably also channel-shaped butfacing in it the opposite direction than the' guidesas" shown ing a. sliding fit within the channels 2. Atthe lower ends of the blocks are bearings'4a (Fig. 5) i receiving the ends of the shaftj5a. of the intermediate roll 5, the shaft being non-rotatably retained in the bearings by means of pins5b (Fig. 3) transfixing the bearings 4a an-d the ends of the shaft 5. The'blocks 4 below the bearings 4a are slightly extendedto form contact faces 42) for engaging the lower boxed ends 2) 'of the guides 2 or to engage the depth stops 3 (Fig. 3);inserted fthrough the openings 2g, so that when the blocks 4 are in their lowermost positions in the' guides 2 the lower periphery of the intermediate roll 5"will be disposed in the plane tangent to the lower peripheries of the front and rear rolls A and E. The upper ends of the 'blocks '4 are preferably boxed as shownat 40 (Fig. 5), and bolted to' the boxed ends 40 are bearing castings 6 for a nonrotatable shaft 1 extending between the blocks4 below theframe channels G whereby both blocks 4 are caused to move in unison,- the shaft 1 being retained "in the castings 6 by means of pins la transfixing'the castings ii and theends of the shaft. Thus the blocks 4 and 'the'non-rot'atable shafts 5a. and I'form a' rigid unit' slidable in the 145 guides 2 and carrying the intermediate roll 5. If desired, shims 8 may be inserted between the castings 6 and blocks 4 for the purpose of adjustment hereinafter explained.

In alignmentwith the axes of the channel's'lis ashaftB journaled in the side frames D of the road roller; and mounted on said shaft are fluid cylinders l carrying journals Illa at their upper ends for the shaft 9, said-cylinders carrying pis- 'tons lOb provided with piston rods 'fllc having bearings Ifld on their outer lower ends which engage the shaft 1, collars la. (Fig, 4) being 'pro' vided on'shaft 1 for retaining the bearings Illd properly spaced between the castings'fi 'and'the 1 collars 1a.. 7 r r 'By the above arrangement the blocks 4 carrying f the intermediate roll may be moved rectilineally fin guides '2 from inoperative position shown in full lines in Fig. 3,'tooperative p0sit ionishownin' dotted lines by direct thrust of the pistons me of the'ifiuid cylinders in. andwhien in operative positionthe depth stops 3 (if necessary) at the "lowerends of the guides 2 will position the intermediate roll 5 so that its lower periphery lies in the plane of the tangent to the lower peripheries of theother two rolls A and Brand byproper se- 'l'ecti'on' org shims :8 between bearing castings 6 i and the'blocks'4'the axis of roll'5 maybe initially adjusted so that same will beheld by blocks l'in a 7 position parallel with the axle of drive rolls E The intermediate roll 5 when in operative position, being disposed in advance of but near the center of gravity of the road roller, will carry the major portion of the weight of the road roller, and willeffectively roll or smooth any irregularities in the road surface. The recessed portions 5 D of the frames D allow ample headroom for receiving the roll 5 when raised into inoperative position shown in full lines,;Fig. 3.- r The above describedconstruction thusprovides an intermediate roll attachment for road rollers in; which the intermediateroll 5 is rectilineally movably mounted in fixed guides 2 secured to the roller frames D and is lowered into operative position by direct thrust of thepiston rods 100.

:v I claim: l. Ina road vehicle having a wheeled frame; guides fixedly mounted on the frame adjacent the center of the vehicle a substantially rigid subframe slidably mounted in the guides; a rotatable ground roll carried bysaid sub-frame and adapted to support the greater'porti'enofj the-weight of the vehicle when theroll is in operative position engaging the ground and means for 'shiftingth'e sub-frame to move said roll erative position. V

2. In combination with a road vehicle a'sfst forth in ,claim 1,- means in said guides for' '-limit ing the downward movement of the sub-fraaelto "fix the operative position of the roll. 5

respect to the sub-frame'for aligning the same in theguidesf' V l 4. In a road vehicle as set forth claimf l, said'sub-frame comprising bearing blocks slidable in the guides; a shaft connecting the blocks ':and having its ends fixedly secured therein for [maintaining the blocks in parallel relation; and said ground roll being journaled onsaidshaft.

5'. In a road vehicle as set forth in claim 1', 'said sub-frame comprising bearing blocks slidable in the guides; a shaft connecting the blocks and havjin'gs its ends fixedly securedtherein; said ground roll being journaled on saids'haft; a second shaft connecting the blocks and having its ends fixedly secured therein; and connections between the frame shifting means and said second shaft. Q f6. In a road vehicle as set forth in claim 1;'in} terconnected members mountedonthje' subeframe adjacent the guides; means for varying the positions of the members with respect Zto'thesubframe; and said shifting means comprising fluid cylinders'adjacent the guides; pistons in'said cylinders; and piston rods connecting the pistons with the interconnected membersf V 'I; In a road vehicle as setffor'th inclaim l,

said; guides being spaced apart; 'and' meansfor adjusting the guides on thevehicle frame, whereby 'the'axes thereof will lie in the same plane. H

v f 8.'In afroad vehicle having'a wheeled frame; 'mernber's fixedly mountedonthe frame adjacent theicenter of the vehicle and having rectilinear guide channels therein slopingl downwardly and rearwardly; a substantially rigidsubframe slidably' mounted in said channels; a rotatable ground 'roll carried by said sub-frame and adapted' to support thegreater portion of the'weight of the 70 vehicle when the roll'i's inoperative position en'- gaging the ground; and means for shifting the sub frame to move ative position; V j

9 In a road vehicle asset forth inclaimjB, a

said roll into and outof oper into and outofop- 3. In roadvehicle as set forth in claim l,

tra nsvers e shaft mounted'in the vehicle frame upon which the members are mounted; and said members having portions underlying the frame and secured thereto.

10. An attachment for road vehicles comprising a pair of guides adapted to be secured to the vehicle adjacent opposite sides thereof; a substantially rigid frame slidable in said guides; a ground roll rotatably mounted in the frame; and a fluid cylinder adapted to be mounted on the vehicle and having a piston operatively connected with the frame.

11. In an attachment as set forth in claim 10, said frame comprising bearing blocks slidable in the guides; a shaft connecting the blocks and having its ends fixedly secured therein for maintaining the blocks in parallel relation; and said ground roll being journaled on said shaft.

12. In an attachment as set forth in claim 10, said frame comprising bearing blocks slidable in the guides; a shaft connecting the blocks and having its ends fixedly secured therein; said ground r011 being journaled on said shaft; a second shaft connecting the blocks and having its ends fixedly secured therein, and connections between the pistons and said second shaft.

ANDREW W. AITKEN.

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