US 2164845 A
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Description (OCR text may contain errors)
y 1 B. c. STEED ET AL 2,164,845
POWER ROLLER FORCOMPACTING MATERIALS USED IN VARIOUS TYPES OF SURFACING Filed Aug. 28, 1956 Z SIueets-Sheet l 8 9 7 32 M 0 3o ZJYWQYA'OW Boyd Cari Ls 5Zeed flawaz'd Brow/z Wen B. C. STEED ET AL July 4, 1939.-
- POWER ROLLER FOR COIIPACTING MATERIALS USED IN VARIOUS TYPES OF SURFACING Filed Au 28, 1936 2 Sheets-Sheet 2 Patented July 4, 1939 PATENT OFFICE 2,164,845- rowan ROLLER FOR- COMPACTING MATE- RIALS USED IN SURFACING VARIOUS TYPES OF Boyd Curtis Steed, Salisbury, and Howard Brown Wentz, Statesville, N. 0.
Application August 28, 1936, Serial No. 98,389
The object of our invention is to provide an improved power roller for compacting materials used in various types of surfacing; to operate under its own power to be movable under its own power at a 5 rapid rate of speed; to provide a roller which will give the results of a solid roller but at the same time will permit differentiating; and to provide the novel combination and arrangement of parts disclosed in the accompanying drawings and herelil inafter described and claimed.
We attain these and other objects of our in-' vention by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a top plan view of the invention; 15 Fig. 2 is a side elevation of the machine in position for operating as a roller, with auxiliary wheels supported clear of ground;
Fig. 3 is a side elevation of the machine in position for moving at a rapid rate of speed, with 29 rollers i supported clear of ground;
Fig. 4 is a rear elevation of the invention when in the position shown in Fig. 2;
Fig. 5 is an alternate or modified form of drive;
Fig. 6 is a side elevation of the form of drive 25 shown in Fig. 5;
Fig. '7 is a section on line ll-l of Fig. 8, showing details of the construction of the rollers; and
Fig. 8 is a transverse section through the rollers on line 5-8 of Fig. 7.
30 Like numerals designate like parts in each of the several views.
Referring to the accompanying drawings, we provide the twin rollers i, mounted on a suitable main or front frame 2. Rollers i rotate around 5 hollow shaft 3 on tapered roller bearings i. Shaft t is mounted rigidly to main frame 2 by means of keyed boxings 5. Boilers i are provided with sprocketsB, rigidly attached, which are driven by the chains 'l, which in turn are driven by the 4 sprockets 8, which are keyed to differentiate axles 8.
The motive power is supplied to the differential axles 9 by the engine ill through the clutch ii, transmission i2, and differential i3, mounted on 45 the inside frame it. The differential axles 9 are equipped with hand brake assemblies i5.
The main frame 2 is supported at its front end either by one or two preferably flat tread pneumatic rubber-tired wheels it; which are 0011-.
50 nected thereto by a fork I'l. I'he front wheels R8 are steered by a worm-driven steering device la. The worm-driven steering assembly is manually controlled by a suitable conventional commercial steering wheel and column which may be con-"'v 55 veniently located with reference to other control.
(on. 94-5 o) as shown in Figs. Land 2, the worm being aflixed to the post of the fork, as shown.
If two wheels are preferred, any suitable commercially built front axle assembly may be substituted for the fork H, but in that case the tread of the front wheels should not exceed that of the roller.
The twin rollers i rotate independent of each other to gain the advantage of differentiation, but
. are spaced close enough together to give the ef- 10 feet of a solid roller. Each roller i is provided with an internal expansion brake shoe i9 anchored to brake anchor 26 rigidly fixed to hollow shaft 3. The braking effect is accomplished by the brake shoe is being forced against the brake drum 2i 1 which is attached to the inside of the roller i.
We provide a hydraulic cylinder and piston 22 to operate the brake shoe it to engage the brake drum 2i, as shown in Fig. '7 of the drawings. The hydraulic cylinder 22 is supplied with liquid 30 from a master cylinder through the tubes 45 leading to the channel 23 in said hollow shaft 3, and in turn through channel 23 to channel M in brake anchor 2i! as shown in Figs. 1 and 8. The brake is operated by the foot pedal 45, which is con- 25 veniently located to the operator.
The machine is provided at its rear end with a rear frame 21! to which are rigidly fixed the rear boxings 2i? and the front boxings 28a. The rear frames 21 and rear boxings 2d are capable of a 30 pivotal movement on the axle 29 which carries the rear auxiliary wheels 25. Front boxlngs 2811 (Figs.
2 and 3) loosely engage the hollow shaft 3 to permit a slight rotation around that shaft and an upand-down swinging movement of that shaft and of the rear portion of the front main frame, the front end of which with forks i'l pivots on the axle ifia. of the front wheels when the rear end of the main frame 2 and the rollers carried by shaft 3 are raised from the ground as shown in Fig. 3. 40 Shaft 3 is mounted rigidly to main frame 2. Boxings 28a prevent movements sideways of the hollow shaft 3 while permitting of the up-and-dowh movement of that shaft with the rollers and the adjacent ends of the main frame and rear frame as described.
We provide sprockets 30 rigidly attached to and operating with the rubber tired wheels 25 whereby the wheels turn with the sprockets. The sprockets 30 are driven by chains 3i, which in turn are driven by sprockets 32, which latter sprockets are rigidly attached to rollers l. The wheels 25 are equipped with a suitable conventional internal 4 expansion hydraulic brake assembly operated by a suitable foot pedal conveniently located to the operator. The wheels 25 rotate around the rear axle 29 on tapered roller bearings. The rear axle 28 .is rigidly mounted to frame 21 by the boxings 28, as shown in Figs. 2 and 3.
We provide double-acting hydraulic jacks 28 having a cylinder, a piston and a piston rod, the lower end of the piston rod being pivotally connected at ll to the swlngable rear frame 21 and the upper end of the cylinder being pivotally connected at 42 to the upwardly slanting frame member 211. Frame members 2a are rigidly afflxe-d to the horizontal front frame 2. Frame struts 33 which extend between frame members 2a. and 21 function to relieve the tension in hydraulic jacks 28. Frame struts 33 are rigidly affixed to frame members 20 and adjustably ailixed to frame member 21 by means of bolts or tapered and keyed pins "a. It will be noted that the members 33 are provided with a plurality of spaced apertures whereby they may be secured in an adjustable position by means of the bolts or pins 33a.
The hydraulic jacks 28 are supplied with liquid from a suitable master cylinder (not shown) and operated by a suitable pump. We provide cross braces 34, as shown in Fig. 1, which function to make the frame 21 more rigid.
In operating this machne as a roller the wheels 25 are jacked upwardly a sufllceht distance to fully clear the ground. and supported by frame struts ll, thus permitting rollers i to come in contact with the surface to be rolled.
Movability of this machine under its own power at a rapid rate of speed is obtained by lacking frame member 2a upwardly a sufhcient distance to fully clear rollers I of the ground and supporting frame members In by frame struts 33, thus permitting rubber tired wheels 25 to support the rear end of the machine.
Figs. 5 and 6 represent an optional attachment which may be used in case it is desired to operate roller and pneumatic rubber tired wheels independent of each other.
The structure shown in Figs-5 and 6 is an assembly which is interposed between shaft 9 and the large rollers I and is hung between frames 2 and I4. The sprockets 8 are removed and the new assembly shown in Figs. 5 and 8 is substituted. The spline hub 35 is keyed to the differential axle and replaces one of the sprockets I in Fig. 2. The sliding spline gear II is driven by spline hub 3! and may be shifted back and forth on that hub by the fork 21a, which engages the collar 81, that collar being integral with or affixed to the gear II. Gear 3!. is shifted back and forth to engage either the sprocket II or the sprocketll. Sprockets I. and 40 both idle on shaft II. Sprocket II is affixed to or integral with gear Ila which drives chain ll. Sprocket ll is integral with or amxed to gear 40a which drives chain I. When gear 30 meshes with and drives sprocket II. as shown in Fig. 5. the drive goes through gear Ila and chain II to sprocket 8| so as to drive the wheels 2!.
When gear 80 is in position to mesh with and drive sprocket I the drive goes through sprocket ll and chain 1 to sprocket I to drive the big rollon I. It will be noted from Fig. that sprocket ll, with its gear "a, is on a different hub from sprocket ,0 with its gear a, and that the sprockets with their respective gears operate independently of each other.
What we claim is:
1. In a power rollerof the type described, the combination of a front frame. a front wheel, means for steering same. twin rollers, an engine independently controlled means operatively connecting said rollers with and driving them from the engine for easily controlled operation under its own power, a stationary shaft on which said rollers are revolubly mounted, a rear frame pivotally connected to said shaft and swingable downwardly to an angle relative to the front frame, an axle carried by said rear frame, wheels rotatably mounted on said arle, sprockets atatached to and rotatable with said wheels, and power means for raising and lowering the pivotal rear frame to bring the wheels into and out of contact with the ground and thereby to correspondingly raise or lower the rollers.
2. In a power roller of the type described, the combination of a horizontal front frame,.a front rollable supporting and steering means, twin rollers, an engine independently controlled, means operatively connecting said rollers with and driving them from the engine for easily controlled operation under its own power, a stationary shaft on which said rollers are revolubly mounted, a rear frame pivotally connected to said shaft and swingable downwardly to an angle relative to the front frame, an axle carried by said rear frame, wheels rotatably mounted on said axle, sprockets attached to and'rotatable with said wheels, and power means for raising and lowering the pivotal rear frame to bring the wheels into and out of contact with the ground and thereby to correspondingly raise or lower the rollers.
3. In combination with the mechanism defined in claim 1, the front frame having rear upwardly slanting frame members, struts amxed at their upper ends to said slanting members, and means for adjustably bolting the lower ends of said struts in either of a plurality of positions to the rear frame, for the purposes described.
4. In combination with the mechanism defined in claim 2, the front frame having rear upwardly slanting frame members, struts amxed at their upper ends to said slanting members, and means for adjustably bolting the lower ends of said struts in either of a plurality of positions to the rear frame, for the purposes described.
5. In a power roller operated and transported under its own power, the combination of a substantially horizontal front frame, front rollable and supporting steering means, a roller, an engine, means operatively connecting said roller with and driving it from the engine, a hollow shaft on which said roller is mounted, a rear frame pivotally connected to said shaft and swingable downwardly to an angle relative to the front frame, an axle carried by said rear frame, wheels mounted on said axle, sprockets attached to and rotatable with said wheels, hydraulic power means for raising and lowering the pivotal rear frame to bend the wheels in and out of contact with the ground and thereby to correspondingly raise or lower the rollers.
6. In combination with the apparatus defined in claim 5, the front frame having rear upwardly slanting frame members, struts affixed at their upper ends to said slanting members, and means for adjustably bolting the lower ends of said struts in either of a plurality of positions to the rear frame, for the purposes described.
7. In a power roller capable of operation and transportation under its own power, the combination of a front frame. a front wheel, means for steering same, independently controlled twin rollers. an engine, means operatively connecting each of said rollers with and driving'them from the engine, a stationary shaft on which said rollers are revolubly mounted, a rear frame pivotally connected to said shaft and swing'abledownwardly to an obtuse angle relative to the front frame, an axle carried by said rear frame, wheels rotatably mounted on said axle, the aforesaid frame being of such length and the wheels so spaced as to equally distribute the weight and 10 driving power and braking power to each of the two rollers and to each of the two auxiliary HOWARD BROWN wmrrz. 10