US2307933A - Scraper - Google Patents

Description

c. LE BLEU Jan. 12, 1943.

SCRAPER 4 Filed Feb. 8, 1941 2 Sheets-Sheet 1 i v INVENTOR.

Jan. 12, 1943. LE BLEU SCRAPER Filed Feb. 8, 1941 2 Sheets-Sheet 2 INVENTOR- mmziww Patented Jan. 12, 1943 UNITED STATESPATENT OFFIE This invention relates in general to material digging, scraping, transporting and leveling machines for use in leveling ground, building roads,

excavating, grading and transporting materials,

254,851 filed February 6, 1939, and which eventuated in Patent No. 2,260,388, October 28, 1941, in which I disclose a common control for the bowl and auxiliary bowl which is adapted to move the auxiliary bowl exclusively of the main bowl and vice versa.

Now, while gathering a load with a machine of the character above referred to, the auxiliary bowl will ordinarily be adjusted, up and down, in the lower portion of its path of travel a number of times before finally being brought to rest in position closing the front end of the main bowl, and in my Patent No. 2,212,713 these adjustments of the auxiliary bowl are accomplished by adjusting the relatively heavier main bowl together with any load that has, at the time of the adjustment, accumulated therein.

In my Patent No. 2,260,388, a single cable is applied to the bowl and apron so that the apron may be adjusted during the loading operation Without the necessity of adjusting the main bowl. However, thi single cable control necessitates a the use of a large number of sheaves, as will be seen, about which the single cable is reeved. This fact coupled with the further fact that the sheaves used on this class of-machines are relatively small in diameter, results in subjecting the cable to excessive Wear and abuse.

This invention, therefore, has as one of its manifold objects, improvements upon my Patent No. 2,212,713 so as to provide means for controlling the apron exclusively of the bowl during the loading operation, said improvements also constituting an improvement upon my co-pending application Serial No. 254,851 in that the multiplicity of sheaves and the cable reeved thereabout is reduced and simplified.

Perhaps it is best stated at this time that it is quite common to View the auxiliary bowl as having simply open or closed positions. It will be more accurate to view the auxiliary bowl as having carrying, intermediate, or dumping positions. In practice, the auxiliary bowl is disposed at its lower limit of travel for carrying position, at its upper limit of travel for discharge position, and

at some intermediate position for loading position thereof. The auxiliary bowl i in the intermediate or loading position when disposed at some point in the lower regions of its path of travel so as to be in position to receive and support thereon materials which move upwardly against the load in the bowl and then tumble forwardly onto the auxiliary bowl. Thus, it is seen that, in practice, the auxiliary bowl is more properly viewed as having carrying, intermediate and discharge positions, instead of simply open and closed positions, and hereafter when the intermediate position of the auxiliary bowl is referred to We shall mean a suitable position thereof relative to the main bowl in which the auxiliary bowl is disposed to allow the passage of a load into the main bowl and also to receive and retain a load which moves upwardly against the load in the main bowl and then falls forwardly onto the auxiliary bowl.

More specifically then, an object of this invention is the provision of a main bowl having loading, carrying and discharge positions; an auxiliary bowl arranged in front of said main bowl so as to be loaded in conjunction therewith and having carrying, intermediate, and discharge positions; and control means applied to said bowls and initially operable when actuated to move said auxiliary bowl from carrying to an intermediate position and thereafter operable upon continued actuation thereof to move both bowls concurrently to discharge positions.

Still other objects and advantages of this invention will be apparent to those skilled in the art upon a detailed perusal of the following specifications and the accompanyin drawings, and

, it is to be understood that my invention is sus- Figure 3 is a front view of the forward end of the toggle link showing the three rollers carried thereby for engaging the frame and the auxiliary bowl.

Figure 4 is a side elevation of a modified form of my invention showing all parts in raised carrying position, the discharge position of the bowls being indicated thereon in broken lines.

Figure 5 is a side elevation, partly in section, of the modified form of my invention showing all parts in the load gathering and supporting positions.

Referring now to the various parts of the preferred embodiment of my invention, reference is made to Figures 1, 2 and 3.

A bowl support Iii comprises spaced apart side walls II rigidly connected adjacent their rear ends by beams I2 and I3 and a back wall M which is provided at its lower edge with a spreader blade I5. sidewalls H are rigidly connected at their lower forward ends by a blade support beam I6 having a blade I? detachably secured thereto. Said sidewalls are each provided along their upper edges with a longitudinally extending beam l8 rigid therewith and at their forward ends with a transverse frame 49 having a forwardly projecting portion 28 which is provided at its front end with a well or opening 21 therethrough. Bowl support It is provided at each side thereof with an inclined rail 22, rigid at their forward ends with transverse frame is and at their lower ends at 23 respectively with an adjacent sidewall I I, the intermediate portion of each of said rails 22 being laterally removed from its adjacent sidewall I I so as to provide unoccupied space therebetween, each of said sidewalls ll being provided with a short rail E i extending parallel to and in spaced relation to the adjacent side of rail 22, thus leaving unoccupied space between rails 22 and the adjacent rails 24, the use of which will become apparent later on.

Means carrying said bowl support II) so that it may be raised and lowered and transported are provided as follows:

A front wheeled truck 25 is adapted, as shown, for connection to a draft device. A post 25 is articulately supported at its lower end on truck 25, as shown, and extends upwardly through opening 2'I in the forward end of frame 29 and is formed to provide opposite channels 21? into each of which a pair of vertically spaced horizontal trunnions 25 extends, said trunnions being rigidly secured to adjacent frame structure 20, and upon the inwardly projecting portion of each of said trunnions a wheel is journaled, as

shown, so as to be operably disposed within channels TI. Thus the forward portion of bowl support I9 is mounted for vertical movement on post 26.

Means for imparting vertical movement to the forward end of bowl support It! is provided as follows:

A bracket 29 is supported on the upper end of post 25 and carries a horizontal pin 30 upon one end of which is journaled a plurality of sheaves 3i, see Fig. l, and upon the opposite end of which is journaled a plurality of sheaves 32, see Fig. 2. A plurality of sheaves 33 are operably arranged relative to sheaves 35 and journaled on pin 34 carried by frame it, see Fig. 1. A plurality of sheaves 35 are arranged relative to sheaves 32 and journaled upon pin 36 carried by frame 2%, see Fig. 2. A direction change sheave 36 is arranged relative to sheaves 33 and journaled on a vertical pin 3 carried by frame 25:, 75

see Fig. l, and a direction change sheave 38 is arranged relative to sheaves and journaled on a vertical pin 39 carried by frame 2'0, see Fig. 2. A pull cable 40 is attached to frame 25 at 4| and then reeved about sheaves 3| and 33 after which it passes about direction change sheaves 36 and 38 respectively and is then reeved about sheaves 35 and 32. Cable 46 then extends downwardly from sheaves 32 to and about a direction change sheave M swivelly mounted on the forward end of frame 2%], and from which it may extend to a winding drum, not shown because of conventional design. Thus it is readily seen that cable 43 may be pulled or slackened to move the forward end of bowl support If) up or down respectively depending upon whether said cable 40 is pulled or slacke-ned.

Means are provided for supporting, raising and lowering the rear end of bowl support It as follows:

A rear wheeled truck 42 includes arms 43 pivotally connected at their forward ends to bowl support It as indicated at 44. Wheeled truck 62 is also provided with spaced apart parallel arms 45 between the upper ends of which a sheave 45 is disposed and journaled on pin 41 carried by arms 65. Bowl support I9 is provided with spaced apart parallel arms 43 rigid therewith and overhanging truck 42. A sheave 49 is disposed between the rear ends of arms 48 and journaled on a. horizontal pin 59 supported by said arms. A sheave 5I is disposed between the upper forward ends of arms 48 and journaled on a horizontal pin 52 carried by said arms. Forwardly of bowl support I9, a sheave 53 is arranged relative to post 26 and sheave 5I and is journaled on a horizontal pin 54 carried by frame 2! The intermediate portion of a cable 55 passes about sheave 46, carried on the upper ends of arms 45, and passes thence about sheaves 4-9, 55 and 53 respectively, both ends of which extend downwardly from sheave 53 to a connection with post 26 as shown at 56, see Fig. 2. Thus it will be readily understood that when a pulling force is applied to cable 4%) raising the forward end of bowl support I0, sheave 53 carried by frame 20, which in turn is an integral part of bawl support I6, will also move upwardly with respect to post 26, to which cable 55 is anchored at 56, resulting in a pulling force in cable 55 so as to swing the forward ends of arms 43 upwardly, thus raising the rear end of bowl support It, and when cable 49 is slackened to allow the forward end of bowl support II] to move downwardly, cable 55 will slacken in response to the downward movement of sheave 53, thus lowering the rear end of bowl support Ill.

A main bowl 5! comprises a bottom 58 disposed between sidewalls I I rearwardly of blade I7, and hanger plates 59 disposed one at each side of said bottom 58 and to the lower edges of which said bottom is secured, said hanger plates 59 being pivotally supported on sidewalls II as shown at fill. Main bowl 5! is thus pivotally supported in a position behind said scraper blade H to receive and support materials scraped up thereby. Each of the hanger plates 59 are provided with a laterally projecting trunnion 6i rigid therewith and extending laterally through openings 52 provided as shown in each of the sidewalls II. It will be readily understood that means may be applied to trunnions 6| to swing bottom 58 forwardly and upwardly to a discharge position, indicated in broken lines at 53, see Fig. 1, so as to discharge materials therefrom directly onto the ground behind said scraper blade ll, that is to say, main bowl may be swung about pivots 60 to dispose the same in a carrying or a discharge position.

An auxiliary bowl 64 is disposed forwardly of blade I! and includes at each end thereof an arm 65 which is attached at its forward end to the auxiliary bowl and extends rearwardly therefrom between rails 22 and 24 to a pivotal connection with bowl support I!) as shown at 66. Auxiliary bowl 64 is thus mounted to swing about pivots 66 to dispose the same in a carrying, intermediate or a discharge position. The carrying and discharge positions are shown in Fig. l, the discharge position being indicated thereon in broken lines at 61', an intermediate position being shown in Fig. 2, in which position it is adapted to receive and support material which moves upwardly against a load in the main bowl and then falls forwardly onto the auxiliary bowl.

Control means for the bowls are provided as follows:

A toggle link 61 is disposed one along the side of each of sidewalls II and each comprises a short link 68 and a long link 69 pivotally connected at their adjacent ends by a pin upon which sheaves H are journaled, each of said links being provided respectively with stops 12 and 13, as shown, and arranged to cooperate in limiting the straightening out or extending action of said links about their pivotal connection HJ. Each of said toggle links 61 is journaled at its rear end on an adjacent trunnion 6| carried by the main bowl, and each is provided at its front end with a pin 14 upon which are journaled three rollers 15, see Fig. 3, the end rollers being arranged to engage rails 22 and 24 while the center roller engages the under edge of an adjacent auxiliary bowl arm 65. Fixed sheave blocks 16, see Fig. 1, and H, see Fig. 2, are disposed one adjacent the forward end of each of side walls H, as shown, and arranged relative to sheaves H. A direction change sheave 18, see Fig. 1, is mounted adjacent the rear end of bowl support In and arranged relative to sheave block 16. A direction change sheave 19, see Fig. 2, is mounted adjacent the rear end of bowl support In and arranged relative to sheave block 11. It willbe understood that sheaves 18 and 18 are also ar- Manipulation of cable 80 is resorted to for dis- 1 posing the bowls in a desired position.

In Fig. 1, both bowls are disposed in a position to support earth, that is, in carrying position. When a pulling force -is applied to cable 80, short links 68 are caused to swing forwardly and upwardly about trunnions 6| so that the toggle links 61 are caused to straighten out or extend, the forward ends thereof moving upwardly along rails 22 and 24 while engaged with the auxiliary bowl arms 65 so that when short links 68 and long links 69 have reached their limits of relative movement, as defined by stops 12 and 13 carried thereby, the toggle links 61 and the auxiliary bowl 64 will have been moved to the positions shown in Fig. 2, and thus the auxiliary bowl has been moved from carrying to intermediate position exclusively of the main bowl in which position the auxiliary bowl is adapted to receive and support material which moves upwardly against the load in the main bowl and then falls forwardly into the auxiliary bowl. Now, the toggle links 61 and the auxiliary bowl 64 having reached the positions shown in Fig. 2, if the pull applied to cable is continued both bowls will be caused to move concurrently to the broken line positions 63 and 6'! in response to the collective bodily movement of toggle links 61. Thus, the toggle links are initially operable to move the auxiliary bowl from carrying to intermediate position, exclusively of the main bowl and thereafter operable upon continuing the pull on cable 80 to move both bowls concurrently to discharge positions. Both bowls being in discharge positions cable 80 may be slackened thus allowing both bowls to move concurrently in a downward direction, the main bowl arriving at the carrying position simultaneously with the arrival of the auxiliary bowl at intermediate position at which time cable 86 may be arrested, or further slackened to dispose the auxiliary bowl, exclusively of the main bowl, in any desired intermediate position or in carrying position.

It is to be noted that my toggle link control for the bowls is particularly well adapted for use with the type of main bowl shown in Figures 1 and 2, in as much as this type of bowl, under certain conditions, may have a tendency to swing in response to pressure from below during the loading operation. However, the toggle links constitute thrust devices between the bowls, when the auxiliary bowl is in an intermediate position, acting in a forwardly direction to maintain the auxiliary bowl in an intermediate position while at the same time acting in a rearwardly direction to maintain the main bowl in its true loading or carrying position.

In operation themachine is caused to move across to surface from which a load is to be gathered. All parts being in the position of Fig. 1, a pulling force is applied to cable 80 to raise the auxiliary bowl to intermediate position and cable 49 is slackened until the blade I! engages the surface to be scraped, after which all parts may appear as in Fig. 2. When the bowls have become loaded cable 80 is slackened to allow auxiliary bowl 64 to come to rest in carrying position to retain the load, and a pulling force is applied to cable 40 for raising bowl support [0 to the position of Fig. 1, in which position the machine is caused to move to a place where the load is to be discharged. To discharge the load, a pulling force is applied to cable 80 resulting in first moving the auxiliary bowl from carrying to intermediate position exclusively of the main bowl and thereafter operable upon continuing the pull on cable 80 to move both bowls concurrently into their respective discharge positions indicated in broken lines at 63 and 61', Fig. 1. When the load has been discharged cable 80 may again be slackened to allow the bowls to move concurrently in a downward direction until the main bowl is in carrying position and the auxiliary bowl is in a selected intermediate position or in carrying position.

Thus we conclude a description of the preferred embodiment of my invention in which the same was combined in a scraper having a main bowl that discharges at the rear end thereof. However, my invention may be combined in a scraper having a main bowl that discharges at its forward end with equal advantage, and reference is now had to a modified form of my invention shown in Figures 4 and 5, in which a bowl support I comprises spaced apart sidewalls I0! rigidly connected at their rear ends by transverse beams I02 and I03, and to which beams rearwardly extending arms I04 and I05 are rigidly secured at their forward ends, said arms being provided at their rear ends with a horizontal axle I06 upon which is journaled a plurality of spaced apart wheels I01.

The lower forward end of sidewalls I9I are rigidly connected by a transverse blade support I 00 to which a blade I09 is detachably secured.

Sidewalls IOI are each provided along their upper edges with a beam I I0 rigid therewith and at their forward end with a transverse frame structure III having a forwardly projecting portion II2. Forwardly projecting portion I I2 is formed to provide a vertically extending opening I I3 therethrough.

A wheeled truck H4 is disposed beneath opening I I3 and is adapted as shown for connection to a draft device.

A post H5 is supported at its lower end on truck H4 and extends upwardly through opening II3, said post being formed to provide channel I I5 at each side thereof.

Forward portion I2 of bowl support I00 is provided, at each side of post I I5, with a pair of vertically spaced trunnions II1 rigid therewith and extending into channels IIB, each of said trunnions having a wheel II8 journaled thereon so as to be operably disposed within said channels.

Thus, the forward end of bowl support I00 is mounted for up and down movement on post 1! I5, and means for causing saidbowl support to so move is provided as follows.

The upper endof post H5 is provided with brackets II9 rigid therewith and supporting a horizontal pin I upon which is journaled a plurality of sheaves I2I. The forward end of bowl support I00 is provided with brackets I22 rigid therewith and supporting a horizontal pin I23 upon whichis journaled a plurality of sheaves I24. A cable I25 is anchored at I25 and reeved about sheaves I2I and I24, and may extend thence to a winding drum, not shown because of conventional design. Viewing Fig. 4, cable I25 may be slackened to allow the forward end of bowl support I00 to move downwardly about the rear wheels as an axis until blade I09 is in scraping engagement with the surface thereunder so that the various parts may appear as in Fig. 5. Now viewing Fig. 5, a pulling force may be applied to cable I25 to raise the forward end of bowl support I00 so that the various parts may appear as in Fig. 4.

A main bowl I21 is disposed between sidewalls I 0| rearwardly of blade I09 and comprises an integral bottom and back wall I28 and I29 respectively, the forward end of bottom I28 being pivotally supported at I30 on bowl support I00 and relative to blade I09. A pair of brace bars I3I are disposed one along the outside of each of sidewalls IOI and are rigidly connected at their upper ends by a transverse beam I32, said beam I32 being attached to the upper edge of backwall I29, the lower ends of brace bars I2I being pivoted at I30 in common with main bowl I21.

Bowl support I00 is provided at each side thereof with an inclined rail I33, rigid at their forward ends with transverse frame I I I and at their lower rear ends at I 34 respectively with an adjacent sidewall IOI, the intermediate portion of each of said rails I33 being laterally removed from its adjacent sidewall IOI', and each of said sidewalls IOI being provided with a short rail I35 extending parallel to and in spaced relation to the adjacent side of rail I33, thus leaving unoccupied space between rails I35 and adjacent rails I33, the use of which will become apparent later on.

An auxiliary bowl I36 is disposed forwardly of blade I09. and main bowl I21 and is provided at each end with an arm I31 which is attached at its forward end to the auxiliary bowl and extends rearwardly therefrom between rails I33 and I35 to a pivotal connection with bowl support I00 as shown at I33.

A toggle link I39 is disposed one along the side of each of side walls IOI and each comprises a short link I40 and a long link I4I pivotally connected at their adjacent ends by a pin I42 upon which is journaled a plurality of sheaves I43, each of said links being provided respectively with stops I44 and I45, as shown, which are arranged to cooperate in limiting the straightening out or extending action of said links about their pivotal connection I42. Each of toggle links I39 are pivotally connected at their rear ends with an ad-- jacent brace bar I3I intermediate the ends thereof as shown at I45, the forward end thereof being disposed to engage auxiliary bowl arms I31 and arrange between the upwardly projecting portion I41 of rail I33, see Fig. 4, and the corresponding upwardly projecting portion I48 of rail I35, see Fig. 5, and each is provided with a pin I49 that extends laterally therethrough and projects to each side thereof into adjacent slots I50 and I5I formed respectively in the upwardly projecting portions I41 and I43 of rails I33 and I35. Thus the forward ends of toggle links I39 are arranged for movement along slots I50 and I5I while engaging the auxiliary bowl arms I31.

Fixed sheave blocks I52, see Fig. 4, and I53, see Fig. 5, are disposed one adjacent the forward end of each of sidewalls IOI, as shown, and arranged relative to sheaves I43 carried by toggle links I39. A direction change sheave I54, see Fig. 4, is

mounted adjacent the rear end of bowl support I00 and arranged relative to sheave block I52. A direction change sheave I55, see Fig. 5, is mounted adjacent the rear end of bowl support I00 and arranged relative to sheave block I53. It will be understood that sheaves I54 and I55 are also arranged relative to each other.

Beginning now with Fig. 5, a cable I56 is anchored to bowl support I00 at I51 and then reeved about sheaves I43 and I53 and passes thence about direction change sheave I55, thence about direction change sheave I54, see Fig. 4, and is then reeved about sheaves I52 and I43 and may extend thence, from sheaves I53, about suitable direction change sheaves to a winding drum not shown because of conventional design.

Viewing Fig. 4, the bowls are disposed in carrying position, and a pulling'force may be applied to cable I 50 in response to which short links I40 are caused to swing forwardly and upwardly'about pivots I46 so that toggle links I39 are caused to straighten out or extend, the forward ends thereof moving upwardly along slots I50 and I5I, formed in rails I33 and I35, while engaged with the auxiliary bowl arms I31 so that when short links I40 and long links I4I have reached their limits of relative movement about pivots I46, as defined by stops I44 and I45 carried thereby, the toggle links I39 and the auxiliary bowl I36 will have been moved to the positions shown in Fig. 5, and thus the auxiliary bowl has been moved from carrying to intermediate position exclusively of the main bowl, in which position the auxiliary bowl is disposed to receive and support material which moves upwardly against the load in the main bowl and then falls forwardly into the auxiliary bowl. Now, the auxiliary bowl having reached the intermediate position, if the pull on cable I56 is continued then both bowls will be caused to move concurrently to discharge position, see broken line positions in Fig. 4 at I51 and I58. Both bowls being in discharge position cable I56 may be slackened thus allowing both bowls to move concurrently in a downward direction, the main bowl arriving at the carrying position simultaneously with the arrival of the auxiliary bowl at intermediate position at which time cable I56 may be arrested, or further slackened to dispose the auxiliary bowl, exclusively of the main bowl, in any selected intermediate position or in carrying position.

Having thus described my invention, I claim:

1. In a scraper; a frame; a main bowl pivotally supported on said frame and adapted to be disposed in loading, carrying and discharge positions; an auxiliary bowl pivotally supported on said frame and arranged forwardly of said main bowl to be loaded in conjunction therewith and adapted to be disposed in carrying, intermediate and discharge positions; and control means for said bowls including toggle links applied at one end thereof to said main bowl and at the other end thereof to said auxiliary bowl, said toggle links'being initially operable when actuated to first move said auxiliary bowl from carrying to intermediate position exclusive of said main bowl, and thereafter operable upon continued actuation of said toggle links to move both bowls concurrently to their discharge positions; stop means cooperating between the toggles to control their sequence of action, and means for causing said toggle links to operate.

2. In a scraper; a frame; a main bowl pivotally supported on said frame and adapted to be disposed in loading, carrying and discharge positions; an auxiliary bowl pivotally supported on said frame and arranged forwardly of said main bowl to be loaded in conjunction therewith and adapted to be disposed in carrying, intermediate and discharge positions; and control means for said bowls including a toggle link comprising a short link and a long link pivotally connected at adjacent ends, the free end of said short link being applied to said main bowl and the free end of said long link being applied to said auxiliary bowl, said toggle links being initially operable when actuated to first move said auxiliary bowl from carrying to intermediate position exclusive of said main bowl and thereafter operable upon continued actuation of said toggle links to move both bowls concurrently to their discharge positions, stop means cooperating between the toggles to control their sequence of action, and means for causing said toggle links to operate.

CHARLES LE BLEU.

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