US1854368A - Road planing machine - Google Patents

Description

April 19, 1932 o. o. DAVIS ET AL ROAD PLANING MACHINE Filed March 18, 1925 3 Sheets-Sheet l April 19, 1932- o; o. DAVIS ET Al. i 1,854,368

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ROAD PLANING MACHINE Filed March 18, 1925 3 Sheets-Sheet `5 Jcr O. Dal/1' a v surface of the road should the tialjly on the line 6--6 of Patented Apr. 19, 1932 U'Nirsn STATES Param errica OSCAR O. DAVIS AND HARRY E. MONROE, OF LOS ANGELES, CALIFORNIA, ASSIGNORS TO STANDARD ROAD MAINTENANCE COMPANY, OF LOS ANGELES, CALIFORNIA, A COR- PORATION 0F NEVADA ROAD PLANING- MACHINE Application filed March 18, 1925. Serial No. 16,313.

This invention relates to improvements 'in .road planing machines An object of the invention is to provide an improved road planing machine having a body or frame consisting of runners capable of .engaging and riding upon the ground or road surface, which runners are adjustably supported upon ground wheels, the purpose being to provide an improved road planing machine which will reduce the force necessary in pulling the road planing machine over the surface of the road because of the ground wheels and whichhas the ground engageable runners which will ride upon the ground wheels drop into any rut or depression.;

A further object of the invention is to provide an improved means for holding the cutting teeth or scarifiers upon the road planing machine.

A still further object of the invention is to provide an improved tooth carrying member upon the road planing machine, which carries the teeth, and to provide means for adjusting the tooth carrying member and the teeth so that as the teeth are lowered, they will always present a new sharp cutting edge. y With the' foregoing and other objects in view which will be made manifest in the following detailed description andspeciflcally pointed out in the appended claims, reference is had to the accompanying drawings for an illustrative embodiment of the invention, wherein: t

Figure 1 is a top plan view of the improved road planing machine;

Fig. 2 is a side elevation of the saine;

Fig. 3 is a vertical section taken substantially on the line 3-3 of Fig. l;

Fig. 4 is a vertical section taken substantally on .the line 4:-4 of Fig. i;

Fig. 5 is a vertical section taken substantially on the line 5.-5 of Fig. 1; and

Fig, 6 is a vertical section taken substan- Referring to the accompanying drawings wherein similar reference characters designate similar parts throughout., the improved road planing machine consists of a rear axle 10 upon which there is mounted a pair of rear ground wheels 11. Longitudinal runners 12 have their rear endsl supported upon the rear axle 10 and normally have their lower edges a slight distance above the ground, usually about an inch and a half. The runners 12 extend forwardly from the rear axle, and adjacent their forward ends they are connected by an axle 13. A pair of front ground wheels 14 are rotatable upon a front axle 15, and a suitable structure, indicated at 16, formed of I-beams, is mounted upon the front axle 15. A. tongue 17 is preferably connected to the structure 16, whereby theroad planing machine may be drawn by a tractor or in any other suitable manner.

Members 18 have their forward ends bent upwardly, as clearly sh-own in Fig. 2, which ends are rigidly secured upon the supporting structure 16. The members 18 are rotatable upon the axle 13 and extend rearwardly therefrom. They are connected by a cross member 19. A jack screw 2O is pivotally secured to the cross member 19 and extends upwardly therefrom. Uprights 21 are mounted upon the sides of the runners 12 and are connected .by transverse members 22, forming a supporting yoke, through which the ack screw 2O extends. A collar 23 is'disposed between the transverse members 22 and has secured to it a hand wheel 24. It will be understood that upon rotating the hand wheel 24, the collar 23 will rotate and thus vertically adjust the jack screw 2 0, swinging the rearward ends of the members 18 upwardly or downwardly upon the axle 13 and thus adjusting the forward .ends of the runners v1-2 with respect to the front ground wheels 14. Normally the bottom surfaces of the runners 12 ,are slightly above the surface of the ground or the road, and the complete machine is supported upon the ground wheels 14 and 11. If in planing the Yroad the ground wheels 14 should enter a rut or depression, the bottom surfaces of the ground engageable runners 12 will engage and ride upon the ground, so that the elevation of the machine will not be materially varied, even though the ground wheels should enter a rut. This prevents the cutting teeth or scarifying devices, which are carried upon the machine, from gouging out the surface of the road. The adjustment provided by the jack screw 2O and the hand wheel 24 provides an adjustment of the distance which the runners are supported above the ground.

As clearly shown in Fig. 5, the runners l2 are formed of channel iron, within which is disposed a filler 2o. Approximately at the centerl of the runners l2, an axle 26 is arranged which extends transversely across the machine. A tooth carrying member, generally designated at 27, is pivotally mounted upon the axle 26 as by bearings 28. The tooth carrying member consists of a. channel iron 29, within which is disposed one or more fillers 30. Smaller channel irons 3l are secured to the back of the channel iron 29 and plates 32 extend rearwardly therefrom and have their rearward ends secured together as by channel irons 33. The plates 32 may be reinforced as by I-beams 34. The whole provides a rigid and strong tooth carrying mem ber which is rotatable upon the axle 26. Bolts 35 extend through the channel irons 29 and 31 and through the filler 30. These bolts project from the forward surface of the tooth carrying member, so as to provide studs upon which are adapted to be tightened clamps 36. Upon the forward face of the tooth carrying member, there is disposed a plurality of teeth or scarifying members 37. These teeth or sca-rifying members may have their ends bent forwardly and are capable of being reversed. In the forward faces of each of the teeth or scarifying members there are formed rows of recesses 38 adapted to receive projections 39 upon the clamps 36. It will be noted that the bolts 35 are arranged between the teeth 37 and that each clamp 36 bears against two teeth, which teeth are adjacent to the bolt upon which the clamp is mounted. Heretofore upon road planing machines employing a plurality of vertical teeth or scarifying members, similar to the teeth 37, a great difficulty has been experienced in preventing longitudinal slipping of the teeth beneath the clamps upon the tooth carrying member. By means of the projections 39 upon the clamps 36, which are received within the recesses 38 upon the teeth 37, an interlocking connection is provided whereby the slipping of the teeth is positively prevented. Furthermore, as each clamp 36 engages two teeth, an upward slipping of one of the teeth 37 will cause a swinging movement of the clamp 36 and will thus tend to force the adjacent tooth 37 downwardly. In this manner, it will be readily appreciated that an improved means is provided for securely fastening the teeth 37 upon the tooth carrying member 27.

Upon the top of the tooth carrying mem- Aber 27 there are mounted staples 40, upon which are pivoted the lower ends of jack screws 4l. The jack screws 4l are arranged 1 forwardly of the shaft or axle 26. Upright members 42 are rigidly secured upon the runners l2 transversely opposite the ack screws 41. The upper ends of the uprights 42 pivotally support a supporting member, generally designated at 43. This supporting member consists of top and bottom transverse members 44 and 45 which have their ends connected as by sections of channel iron 46. Bolts 47 extend through the sections of channel iron 46 and through the upper ends of the uprights 42. These bolts serve as pintles for pivotally mounting the supporting member 43 between the uprights 42. The jack screws 4l extend upwardly through the transverse members 44 and 45, and collars 48 are threaded onto the upper ends of the jack screws 4l and are disposed between the members 44 and 45. Thrust bearings 49 may be arranged between the collars 48 and the top and bottom transverse members 44 and 45. rlhe collars 48 carry beveled'gears 50, which are engageable by beveled pinions 5l which are mounted upon shafts 52 rotatable within bearings 53 which are mounted upon the lower transverse member 45. T he shafts 52 are provided with hand wheels 54, whereby the shafts 52 may be rotated, rotating the beveled pinion 5l, the beveled gear and the collars 48. Rotation of the collar 48 elevates or lowers the jack screws 4l and thus elevates or lowers the tooth carrying member 27 and the teeth 37.

Because of the fact that vthe tooth carrying .member is pivoted upon the shaft or axle 26 and the teeth 37 are arranged forwardly of the shaft or axle 26, it will be appreciated that the edges of the teeth 37 becomeworn even with the ground. As the tooth carrying member 27 is forced downwardly, it will be understood vthat the forward edges of the teeth 37 will engage the ground, whereas the rearward edges of the teeth 37 will not quite engage vthe ground because of the fact that the tooth carrying member 27 is pivoted in the manner shown. in this manner forcing the tooth carrying member 27 downwardly will cause a new sharp edge to be presented upon each of the teeth even after the teeth have become worn.

Upon the inside surfaces of the runners l2 rearwardly of the tooth carrying member 27, there are mounted angles 55 providing guides, within which are slidable blades 56. The foremost blade 56 is inclined from one side of the machine rearwardly and towards the opposite side of the machine, whereas the rearmost blade 56 extends from the rearward end of the foremost blade 56 rearwardly and toward the rear of themachine. In this manner, the scrapings or the loose dirt will be shifted from one side of the machine toward the opposite side by the foremost blade 56 and will then be shifted by the rearmost blade 56 back toward the first side of the machine1 causing the dirt to be moved from side to side, filling ruts or other depressions in the road.

Uprights 57 are secured to the runners 1Q adjacent the ends of the diagonal blades 56, and transverse supporting members 58 are carried by these uprights. Eyes 59 are secured to the blades and jack screws 60 are pivotally secured to the eyes 59. These jack screws extend through the transverse supporting members 58, and collars 61 are threaded onto the upper ends of the jack screws 60 and are disposed between the transverse supporting members 58. Each collar 61 has rigidly secured thereto a hand wheel 62 by which the collar 61 may be rotated to raise and lower the blades 56. Thrust bearings 63 may be arranged between each collar 61 and the transverse supporting members 58. An aperture 64 is formed in the rearmost end of the forward blade 56. It will be understood that as the scrapings orloose dirt pass rearwardly over the face of the foremost blade 56, they pass through the aperture 64 and are picked up by the rearward blade 56. The scrapings on reaching the rearward end of the rearward blade 56 pass through the runner 19. as by an aperture 65 formed in the runner. It will be understood that by the construction of the blades 56 and by the means for elevating and lowering the blades, one end of one blade can be raised slightly above the other in grading the crown of the road which is planed by the road planing machine.

From the above it will be appreciated that an improved road planing machine is provided, consisting of ground engageable runners adjustably supported upon ground wheels, and that an improved means for mounting and adjusting teeth or scarifiers upon the road planer is also provided.

It will be understood that various changes in the detail of construction may be made without departing from the spirit or scope of the invention as defined by the appended claims.

We claim:

1. A road pla-ning machine comprising a frame including a pair of 'road engageable runners, ground wheels normally supporting the runners above the road, means for adjusting the runners with respect to the ground wheels, an axle disposed between the runners,

f a tooth carrying member pivoted upon the axle and extending forwardly therefrom, teeth disposed upon the forward end of said tooth carrying member, studs extending forwardly from the tooth carrying member between said teeth, clamps mounted upon said studs having projections receivable in recesses on said teeth to prevent slipping, means for adjusting the tooth carrying member, a pair of blades extending obliquely between the runners in opposite directions behind the

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