Патент USA US2281224код для вставки
April 28, 1942- 2,281,224 D. F. BAUMGARTNER GRADER Filed May 6, 1941 4 Sheets-Sheet 1 . INVEN Danlzl E Boumga BY . 1M, WTTORNEYS. *M April 23, 1942- D. F. BAUMGARTNER 2,281,224 GRADER Filed May 6, 1941 4 Sheets—Sheet 2 I INVENTOR. Daniel E Baumgari'nerr BY M PM ~ ATTORNEYS April 28, 1942. 2,281,224 D. F. BAUMGARTNER GRADER Filed May 6, 1941 4 Sheets-Sheet 3 mg 35 $5QM INVENTQR. D G H Wu. CL B G U m a: 0 r IT n Z E M, w;ATTORNEYS. M1, 228L224 D. F. BAUMGARTNER GRADEP‘ } Filed May. 6’ 1941 4 Sheets-Sheet 4 52 II 27 I . 53 5955 I 54 II W 1“ l’ 5 27 a /L7 H‘ \ H I 'I I II \ H 1 I’, I ‘ U I ‘L- 1/ F II, - 4 4 6 5 I 22 1I/ / \ ‘ \ 28 “\ \\ 2| l6 3o ///// %/ e4 63 BI 32 32 W9 7 ‘INVENTOR BY M ‘1m , ATTORNEYS’ Patented Apr. 28, 1942 2,281,224 UNITED STATES PATENT OFFICE. 2,281,224 GRADER _ Daniel F. Baumgartner, Bucyrus, Ohio Application May 6, 1941, Serial No. 392,064_ 4 Claims. (Cl. 37-156) My invention relates to a grader. It has to do, more particularly, with a road grader which is the surface to be graded. Suspended from the main frame is a sub-frame which carries a provided with a scraper blade adapted to operate scraper blade that is normally transversely dis posed and in horizontal position. The front end of the‘ sub-frame is pivotally connected to the main frame and the rear end of the sub-frame is suspended from the main frame by lifting links in in a horizontal position or at any desired angle relative to the horizontal. In the past, several different types of road graders have been provided which have included a scraper blade that could be adjusted from the horizontal position to any desired angular posi such a manner that the sub-frame may be swung towards and away from the main frame. This tion up to a substantially vertical position. This 10 varies the distance of the scraper blade from the main frame. The sub-frame is supported on the type of road grader is adapted to be used for main frame in such a manner that the entire sub grading horizontal road surfaces or for grading frame may be bodily revolved around the longi the vertical surfaces of ditches or banks. How tudinal center line of the main frame. This ad ever, the prior art road graders of this general justment is for the purpose of moving the scraper type have been possessed of certain undesirable blade to any desired angle from a horizontal posi features. Usually the scraper blade is carried on tion to a vertical position. Furthermore, the a sub-frame which is carried by~a main frame. sub-frame will revolve bodily around the main The sub-frame is ordinarily connected at its front frame. Therefore, binding and resulting exces end to the main frame by a, universal joint which is in, a ?xed position while the rear end of the 20 sive strains will be eliminated from the machine. Thus, the adjusting of the scraper blade between sub-frame is so mounted that‘it can be swung around the main frame to position the scraper / . horizontal and vertical positions is accomplished without the use of telescoping or collapsing con— blade at the desired angle. With this structure, necting links on lateral shifts and without short the sub-frame is not rotated bodily about the main frame, which corresponds to the line of draft or pull, and, consequently, binding and re sulting excessive strains will be set up in the sub frame, the scraper member and other parts asso ciated with the sub-frame. One of the objects of my invention is to pro ening or lengthening the lifting links. The scraper blade is carried on the main frame by means which permits swinging of the blade to vide a road grader which carries a scraper blade that can be adjusted from a horizontal position to any desired angular position up to a vertical position so that it may be employed for grading horizontal surfaces, such as a roadbed, or angular or vertical surfaces, such as banks or the walls'of ated with ease. a ditch. Another object of my invention is to provide a road grader of the type indicated in the preceding any desired angle in a horizontal plane. All of the movable units of the machine are preferably controlled hydraulically so that they may be oper The preferred embodiment of my invention is illustratedin the accompanying drawings where in similar characters of reference designate corre sponding parts and wherein: Figure 1 is a perspective view of a machine constructed according to niy invention. Figure 2 is a- longitudinal sectional view taken along line 2-2 of Figure 3 through the main paragraph wherein the scraper is carried by a 40 frame of my machine. Figure 3 is a plan view of my invention, show sub-frame which is adjustable on the main frame :ing the scraper blade in horizontal position. in such a manner that it may be rotated bodily Figure 4 is a similar view of a portion of the about the longitudinal center line of the main machine showing the scraper blade in vertical frame, or line of draft or push, so that there will position. ' ' be no binding and resulting excessive strain Figure 5 is a sectional view taken along line created in the machine during operation. 5—-5 of. Figure 6 showing the sub-frame and Another object of my invention is to provide a associated parts of my machine. machine of the type indicated wherein all of the Figure 6 is a side elevation of my machine. movable units are hydraulically controlled so that Figure 7 is a transverse sectional view taken they may be adjusted with ease by thepperator i substantially along line 'l—'l of Figure 3. from a central location. With reference to the drawings, I have illus _ In its preferred form, my invention contem trated a road grader ‘comprising generally a main plates the provision of a road grader which em frame unit I, a sub-frame unit 2 and a tractor bodies a main frame suitably supported on wheels or power unit 3. The particular construction-cf and adapted either to be pulled or pushed along, c 2 2,281,224 . the unit 3 does not form a part of my invention and, therefore, ‘need not be discussed in detail. It is a self-propelled unit adapted to push the combined units I and 2 along the surface to be graded. . , The structure of the main frame unit I is illus trated best in Figures 2 and 7. It comprises a ‘ pair of longitudinally extending channel mem bers 4 disposed with their channeled sides to versal joint 23, to a yoke member 24. This yoke member 24 depends from a collar 25 which-is clamped to the forward end of the tube It by means of a split clamping portion 28. The rear end of the frame 2 is suspended from the tube II by means of a pair of hydraulic cylinder and piston units 21. Each of the units 21 isv pivotally carried by a yoke 28, as at 2!, for swinging later ally of the tube‘ I‘. The tube IO carries at dia wards each other and secured together by weld~ 10 metrically opposed points trunnions 30 upon which‘ the yoke members 23 are rotatably mount ing or other suitable means. At the forward ends of the channels 4 a tubular bearing member ‘ i is mounted thereon and may be suitably an chored in position. At the rear ends of the chan ed. Thus, the units. 21 may also swing longi tudinally of the tube I4. Each of the units 21 is provided with a piston rod 3| extending from nels a tubular bearing member ‘I is mounted 15 the lower end thereof. The lower end of each rod 3| is pivotally connected, as at 22, to the rear thereon and may be suitably anchored in posi end of the frame 2. Suitable means, to be de tion. The tubular bearing member 6 fits within a rearwardly projecting tubular housing 3 which scribed later, _is provided for controlling the hydraulic fluid supply to the units 21. This is formed on the upper portion of a frame sup port 3. The interior of the housing 3 is provided 20 means is of such a nature that both units 21 may be operated simultaneously to swing the frame with an annular shoulder I0 which limits for ward movement of the bearing 6 into the housing 8. The housing 3 is split at its upper side and is provided with pairs of lugs 8a which receive bolts by means of which‘ the split portion of the 25 _ housing may be drawn together to tightly clamp about the universal joint 23 and thereby raise or lower the rear end of the frame while still maintaining it substantially horizontal or it may be operated to selectively control units 21 in such a manner as to raise one side of the rear end of frame 2 and lower the other side thereof. In other words,‘ frame 2 may be raised or lowered without'tilting transversely or it may be tilted II which is swiveled thereto by means of a pin I 2. The yoke portion II receives an axle member 30 transversely as desired. Theframe 2 at its rear end is provided with is which is pivotally connected thereto, as at I4. the usual type of “circle" 33 for supporting the The axle I3 carries a pair of pneumatically tired scraper blade 34. The circle33 comprises a cir wheels l5. Suitable means (not shown) may be cular member 35 which has an inwardly proprovided for steering the wheels l5. Further more, the wheels l5 may be of the tilting type 35 jecting ?ange 38 on its upper edge. This ?ange 36 rests on a plurality of brackets 31 secured to if desired. the bearing portion 6 therein. The frame sup port 3 is provided with a depending yoke portion The bearing sleeve 6 projects rearwardly from the housing 8. This projecting portion of the bearing sleeve receives the forward end of a large longitudinally extending tube or pipe l8 which is 40 the frame 2 at a plurality of points circumferen tially of member 35. . The scraper bar 34- is sus pended from .member 35 by means of rearwardly and downwardly extending pull bars 38. The lower end of bars 33 is pivotally connected to the blade 34, as at 33, adjacent the lower edge is rotatably carried by a forwardly extending of the blade. At its upper edge the blade is pro reduced portion of the bearing sleeve 1. The vided with pivoted straps 40 which are provided forward end of the tube I6 will bear against the rear end of the housing 3 while the rear end of 45 with a plurality of openings H. A pin may be passed, through any one of these openings into the tube IE will bear against an annular shoulder an aligning opening in the bar 33. Thus, the I‘! on the bearing sleeve 1. The bearing sleeve blade “may be adJustably pivoted on the bars 1 is supported in a forwardly projecting tubular 38 to any desired position and be held in such housing IS. The member 1 is held in position within the housing I8 by means of a collar I! 50 adjusted position. The member 35 is adapted to be rotated about which surrounds member l8 and which extends its axis to swing the blade 34 in a horizontal over the shoulder I‘! of member 1. However, plane by means of a cable 42 which passes around member ‘I may be secured in member l8 by a the periphery thereof and is held in position press ?t. The collar I9 is held in position by means of a plurality of circumferentially spaced 55 thereon by suitable guides. This cable 42 is passed around a sheave 43 which is keyed to a bolts 20 which extend through openings in the shaft 44 extending into a gear housing 45. The collar and are threaded into the forward edge pin 44 carries a pinion 46 within housing 45 of member It. The member I! is carried by the which engages a rack bar 41 slidably mounted upper portion of an A-type frame 2| which ex tends forwardly and upwardly from the unit 3. 60 in a guide 48 secured to the housing. This rack bar 41 forms a portion of a piston rod extending It will be apparent that when the unit 3 moves from a hydraulic cylinder and piston unit 49 along, the frame 2| will push the units I and 2 which is pivotally carried as at 50, by the frame forwardly. The housing 8 serves as a thrust 2. Av suitable control for controlling the supply bearing at the forward end of the tube l6 while the bearing sleeve 1 serves as a thrust bearing 65 of ?uid to the unit 43 is provided which will be explained later. By properly controlling the unit at the rear end of the tube IS. The tube I8 may 43 the blade 34 may be swung in a horizontal be rotated about the channel members 4 and about its own axis. A bolt member 22 passes plane or about the axis of the circle 33. through the forward end of the housing 8 and For rotating the tube I 6 about its axis to re is threaded into the block 5, carried by members 70 volve the frame 2 about said axis, I provide the 4 at the front ends thereof, to aid in positioning following structure. It will be noted that a the housing I on bearing sleeve 6 and to aid in sheave 5| is formed on the rear end of the tube keeping it in position thereon. IS. A cable 52 is passed around this sheave 5|. The sub-frame 2 is of substantially Y-shape. The two strands of this cable pass rearwardly ‘ Its forward end is pivotally connected, by a uni over a pair of sheaves 53 which are keyed on a rotatable thereon. The rear end of this tube I6 2,281,224 3 and to a source of hydraulic liquid in the usual shaft 54 that is transversely disposed and rotat ably carried by brackets 55 secured to the frame 2|. Shaft 54 is vertically adjustable in order to adjust the position of the sheaves 53 to provide manner. ‘An important feature of my invention resides in the fact that the frame 2 is revolved bodily around the axis of the tube I 6. The force ex take-up in the cable. The rear portion of the erted through the frame 2 to pull the blade 34 cable passes around a sheave 56 which is keyed along with the main frame I will be exerted on on a shaft 51 that is rotatably carried by the the axis of the frame 2. The pushing force frame 2|. Below the sheave 56 the shaft 51 has exerted by the unit 3 to move the grader itself a gear 58 keyed thereon. This gear is engaged by a rack bar 59 which forms a part of a piston 10 along will be exerted along the axis of the unit I. Thus, binding of the various parts of the machine rod extending from the hydraulic cylinder and and resulting excessive stresses will be elimi piston unit 60. This unit 60 is rigidly carried nated. Since all parts of the machine are pref by the frame 2|. A suitable control, referred to erably hydraulically operated, the machine may hereinafter, is provided for controlling opera tion of the unit 60. When the unit 60 is operated, 15 be controlled with ease by the operator from a central location. the tube l 6 will be swung about its axis and, con Various other advantages will be apparent sequently, the frame 2 will be revolved bodily from the preceding description, the drawings and about the axis of the tube l6. With this struc the following claims. _ ture the blade 34 may be swung from the hori Having thus described my invention, what I zontal position shown in Figure l and some of 20 claim is: the other ?gures to the vertical position shown 1. A road grader comprising a main frame, in Figure 4 or to any desired intermediate posi said main frame including a support, a tubular tion. In fact, the blade 34 may be swung to a vertical position at the opposite side of the ma chine from that shown in Figure 4. ‘ member carried by said support for rotating 25 about its own axis, a sub-frame suspended from When the blade 34 is swung into a vertical position, or approaching a vertical position, at either side of the machine, it is desirable to have ‘ said tubular member, said sub-frame having its forward end connected to said‘ tubular member by a universal joint and having its rear end con nected to said sub-frame by vertically adjustable some means for supporting the weight of the frame 2 and the parts carried thereby other than 30 means, a scraper blade carried by said sub-frame, and means for rotating said tubular member so the piston rod 3|. For this purpose I provide a that the sub-frame will be revolved about the rod 61 which has one end universally connected, axis thereof. as at 62, to the frame .2 and its other end uni 2. A road grader according to ‘claim 1 wherein versally connected, as at 63,, to a bracket 64 ex tending downwardly from the tube Hi. This rod 35 the vertically adjustable means includes hy 6| will take the weight off the piston rod 3| draulically operated cylinder and piston units. and will prevent binding of the piston rods or pistons of the units 21. When it is desired to use my grader for grad ing substantially horizontal surfaces, the units 1 21 are controlled to adjust the blade 34 to the proper level. They may be controlled in such a manner that the blade 34 is horizontal or is tilted transversely of the machine to produce a 3. A road grader according to claim 1 wherein the scraper blade is supported on the sub-frame by means of a circle, and hydraulic means for crown on the road surface. The circle 33 may be operated by controlling unit 49 to swing the blade 34 to any desired position about the axis of the circle. When it is desired to use the grader for grading surfaces at an angle relative to the horizontal, the unit 60 is operated to cause the frame 2 to revolve about the axis of the tube I5. All of the hydraulic cylinder and piston units may be controlled from a central point. The control valves are preferably carried adjacent the operator’s platform on the frame 2| (Figure _ 6). Two way valves 21a and 21b are connected to units 21, and similar valves 49a and 60a are provided for controlling the units 49 and 60. ' The valves are connected to the various units controlling said circle. 4. A road grader comprising a main frame, said main frame including a longitudinally ex tending beam support, a longitudinally extend— ing tubular member carried by said support for rotation about its own axis, a sub-frame sus pended from said tubular member, said sub frame‘ having its forward end connected to said tubular member by a universal joint and having its rear end connected to said sub-frame by ver tically adjustable means permitting transverse tilting of the sub-frame, a scraper blade sup ported on said sub-frame, said scraper blade be ing supported by means of a circle permitting swinging of the bladejn a horizontal plane, and means ‘for rotating said tubular member so that the sub-frame will be revolved about the axis thereof. DANIEL F. BAUMGARTNER.