US1786694A - Hammer crusher - Google Patents

Description

(5. W. BORTON HAMMER CRUS HER Dec. 30, 1930.

Original Filed Aug. 25. 1928 INVENTORI GeorgeWBortoq sea vnee. so, 1930 us-i s rates 1,7saea4 GEORGE w; Benson, or ivawinrsson, NEW ans-say, ASSIGNQR r rannsY yanrA 1 1 CRUSHER coMraNy; or NEW YORK, it. "i., A oonroaa'rron or yEwyoRK HAMM causnnn am application filed August 25, 1928, Serial No. I 1929. Serial This application is a division of my application for patent tiled August I 1928,

I Serial No, 302,080.

- receive what is known as steam shovel feed or the contents of a quarry car, which may be delivered directly into the hopper leading to the crushing zone; 7 i

My present improvements have been ap plied to a structure of the type set forth in my pending application filed August25y1928; Serial No. 302,080, wherein I have described a machine highly efficient for the crushing i material by what may be termed up-running hammers, that is; to say, hammers which pass upwardly between grid bars located in, thefeed'chute 0r hopper and which serve as temporary supportingmeansfor the mate rialoperated upon. These hammers in their rip-running action .tend to lift the larger pieces of material in addition tovthe incremental breaking or crushing action imparted of the-chamber comprising the feed chuteon iopper: into which the material to be crushed.

is dumped; one wall of the samebeing in the form of ahea-vy, reinforced plate, preferably curved andapartiallyoverhanging the hopper, which wall or plate maybe pivotally connected to the frameor hous ng.

302,080. Divided and this application filed. June 6, Na 368,819..

One object-of my invention is to provide means whereby thematerial to be crushed may be retarded in its movementthro igh the hopper-and temporarily supported in a position to be engaged by the hammers of the head. movement, and for'this' purpose I proyide a series of grid barsprojecting int-o the hopper space and which may extend part way or'entirely across the path of the feed and lying overthe rotor structure; the hammers, ofsuch rotor structure passing between said bars and initially engaging such material be-' fore it passes to the lower portion of the crushing chamber. a

rotor structure in their lip-running or overj These grid bars temporarily support the,

larger pieces of material while the hammers are incrementally nippingthem down and preventsuch larger masses crowding in on the hammers and chokingth'e crusher;

A further object of my invention is toprovide the pivotally mounted breaker wall of the chute or hopperwith projectingmemhers, for cooperative [association with grid bars extendingpart wayo-r entirely across the hopper above the rotor'structure; said projecting members being adjustablerwith re spect to the wall of the hopper and toward and from the ends of the shorter grid bars and being available for the dislodgment of any large masses which tendto jamin the hopper and lie outof range of the hammers;

These projecting members alsohelp support the larger pieces of stone or other material, in conjunction with the grid bars, while the hammers are nipping it; thereby preventing choking of the crusher by the premature entrancelotthe larger piecesof stone or other material into the more 'activepor tion of the hammer zone; l

*These and other ieatures' of my invention are more fully describedhereinafter; referencebeing had to the accompanying draw"- ingsyin whichz p g I Figure l'is across sectional elevation, more or-less diagrammatic in character, 'llustratinga formof hammer crusher mechanism within the scope of my invention and Fig. 2 is a sectional plan viewof a portion;

of structure shown in Figure 1, taken on the line IIII.

Like the structure of my pending application above referred to, my present structure comprises a base 1, supporting a frame or housing, indicated generally at 1 which may be made of structural metal and/or heavy cast parts suitably secured together and supporting the various elements making up the crushing structure, and more fully referred to hereinafter.

A screen or cage 2, wh ch may be made up of arcuate side members 3, supporting a series of bars 4, is disposed in the base portion of the structure; such screen as a whole being pivotally supported on a shaft 5 dispose: atone end of the machine, and adjustably supported at the opposite end; preferably by chains 6, passing over pinions 7, carried by a shaft 8; which chains may be adjusted as desired to elevate or lower the right hand end of the cage or screen by imparting rotative movement to the shaft 8. The bars 4 may be of the type illustrated in my Patent No. 1,624,886, dated April 12, 1927, or like those shown in the co-pen din g application of Oscar Anderson, filed July 24-, 1928, Serial No. 295,039. The shaft 5 supporting the left hand end of the cage or screen, as illustrated in the drawings, may be of the adjustable type, such as illustrated in the patent of Charles R. Rouse, No..1,695,562, dated December 18, 1928.

Within the crushing chamber provided by such cage or screen and above the latter a hammer-carrying rotor structure is mounted, which may comprise a shaft 10, j ournaled in suitable bearings 11; end plates 12; a series of disks 13 arranged between said end plates;

' rods 14 extending longitudinally of the rotor structure and passing through said disks and secured to said end plates, and hammers15 which are pivotally hung on said rods. Hammer-carrying rotor structures of this general type are well known in the art and the hammers may be of any suitable type; preferably of massive and heavy construction, which may have renewable tips in order that wear may be compensated for and fresh tips supplied without removing the shanks of the hammers from the suspension rods 14:.

The chute or hopper into which the material to be crushed'may be delivered is indicated generally at 20, and is partly overhung by a'curved breaker wall or plate 21, forming oneend of the crusher structure and which may comprise a reinforced frame or plate of heavy construction. This frame or plate may be p'i'votally mounted on the shaft 5 which supports the cage or screen and may have its inner and partially overhanging face providec with a series of renewablewear members 22, which may be secured to said frame or plate by suitable bolts, as indicated at 23 the larger masses of material fed into the hopper while the latter are being acted upon by the up-runnmg hammers 15, moving in the direction of the arrow at, until such larger masses have been reduced or broken to a size that will permit passage through the spaces between or beyond the grid bars for further action by the hammers 15, cooperating with the bars of the cage or screen, in the final crushing chamber of the machine.

The wall 21 of the hopper or chute, which.

is curved and partially overhangs the grid bars, may be provided with a series of relatively fixed wear plates, indicated at 22. For the purpose of temporarily supporting the material to be crushed additional retarding means may be provided, and one of these plates, that indicated at 22 for instance, may be provided with a series of adustable memherein the form of rods 30 extending through said wear plate; which projecting rods may be disposed above the grid bars 25 or set in any manner with respect to the same that may be desired. The position of these projecting rods is such that they afford additional means for retarding the delivery of the material to be crushed and for this purpose they may be set at various angles and secured in. position by any suitable means that will permit them to function in the proper manner.

By providing the rods with racks, indicated at 30, longitudinal. motion may be imparted to them by means of pinions 31, mounted on a shaft 32 which may be journaled in the reinforced frame or plate forming the curved wall 21; a hand wheel 33 serving to rock said shaft 32 and eflect the desired movement of said rods 30 when it is desired to adjust the same. This movement may also be employed to dislodge any masses of material which may have been wedged in the lower part of the chute above the grid bars. In lieu of such operating means for these bars, they may be set in the desired position (or positions) by hand and held therein by adjustable Wedges.

The, rods 30 are associated with the grid bars 25, which may extend partially or entirely across the lower end of the chute or hopper. The shorter grid bars when employed may terminate at a point just beyond the vertical axis of the rotor structure, or at any desired point where they will perform the desired function. The short grid bars may be of the type disclosed in the copending application ofCharles A. Jamison,

filed August 25, 1928, Serial No. 302,108, and

arcuate side members 3, connected together by suitable spacing cross ,members 3*, 3 et seq.; such side members being hung on the shafte at one end (which shaft may be of the type disclosed in the application of Rouse, before referred to), and supported at the opposite end by chains 6, passing over the pinions 7, carried'by the shaft 8.

A tramp iron pocket may be arranged at the right hand side of the machine, as illustrated in Fig. 1, just beyondthe end of'the cage or screen. At such part of the machine the cross section 21 of the frame which extends between the side walls of the structure and serves as a support for the'grid bars is arched, and receives a wear plate 71 which may extend part way into the crushing cham.- ber being notched at 72 for the passage of the hammers. An opening 7 8 is I provided between a lower cross member 21 and said plate 71, and uncrushable material-discharged through said opening 7 3 may drop onto the shelf provided by said cross-member 21 It willbe seen therefore that any tramp iron in the form of spikes, bolts,nuts and/or the like or other uncrushable material in the path of the hammers will be forcibly thrown against this arched wear, plate 71 and be discharged from the crushlng zone.

it will be un'derstood, of course, that the several walls of the machine, including the chute or hopper, will be provided with the usual wear plates, and that the side members 3 of the cage or screen will carry the usual shedding members designed to shed or direct material being crushed into the path of the hammersand through the spaces between the bars of the screen or cage. Y i

As in the machineof my pending application above referred to, the bottom of the feed chute or hopper formed byxthe grid bars 25,

' cuts into the up-runninghammer circle at a point below the high point offthe'same; in

other rords, the uprunning-hammers have an opportunity of impacting the stone on an up grade for a considerable portion of the arc of the hammer circle, before the center or highest part of the hammer circle is reached. This is believed to be a distinctly advantageous feature of construction, as large pieces of stone or other material are retarded in going'uphillandthis additional time element gives the hammers better opportunity 1n the earlystages, when the pieces of stone'or other material are large, for the'importantand heavier preliminary breaking, so that'when the uncrushed material gets up to thezenith or highestportion of the circle and starts downward at increased-speed, it is better adapt d, by reason of its size, to take the balance of the ride down hill to the left of the zenith, when its speed would be faster and where the lesser but no less important sec would be more rapidly carried into adown hill position. This condition would give the hammers less time todo the prelminary heavy crushing, which would mean that the materia'lwould enter the rapidly restricting zone between the hammers and the breaking surface ofthe wall or plate 21, in appreciably large sizes; thereby causingcongestion of worlrin this restricted Zoneyreducing the chance for a complete and .final reduction, from the hammer action, withincreasedwear and shock to themachine, and the necessity ofincreased power because the total reduction period would be considerably increased.

l claim: v

i. In a crushing machine, the combination: n ith a frame having a hopper and a breaker call structure pivotally connected to said frame and pa tly overhanging said hopper,

, rarily retarded.

In a structure such as set forth in claim 1, adjustablemembers carried by the breaker .wall structure and adapted to be projected into the hopper space to serve as additional retarding means totemporarily support the material .0 be crushed andto displace masses thereof jammed'in the bottom of said hopper. '3. lnafstructnre such asset forth in claim 1.; adjustable members carried by the breaker wallstructure and adapted to be projected into the hopper space to serve as additional retarding means to temporarily support the material to be crushed and to displace masses thereof jammed in the bottom ofsaid hopper, and means for operatingsaid projective members. j j V j 6 in a structure such as setforth in claim 1, series ef adjustable rods carried by the pivotally mounted breaker wall structure and projecting into said hopper in. substantial alignment with said grid bars, and means: for moving said rods'toward and from the. endsofsaid grid barsQ i 5. In a structure such as set forth in claim 1, a series of adjustable rods carried by the pivotally mounted breaker wall structure and projecting into said hopper opposite the ends of said grid bars, and means for moving grid bars.

6. In a structure such as set forth in claim of adjustable rods carrier by the mounted breaker wall structure ec" into the hopper space, racks en (ID'SZUQ rods, pinions engaging said racks and means for operating said pinions.

7. In a ham crusher, the combination one providing;- a crushing chamber, a pirotally supported screen iiirming the lower portion of said crushino chamber, ro-

tating hammers within said chamber, a chute deliveringinto said crushi" chamber and having a curved wall, and grid bars extending part way into the chu which. said hammers may pass, of adjustable projections carried by one of said breaker plates and extending into the chute opposite the ends of said grid bars for retarding delivery of the material under treatment.

8. In a hammer crusher, the combination with a frame providing a crushing chamber, a pivotally supported screen forming the lower por ion of said crushing chamber, ro-

toting hammers within said chamber, a chute delivering into said cr g chamber and ravine one wall constituting a breaking surface, and grid bars extending into the chute between which saic hammers may pass into engagement with material temporarily supported thereby, of adjustable projections carried by said breaking surface and extending into the shute; said projections cooperating with said grid bars to retard delivery of the material under treatment.

9. A hammer crusher comprising a frame having a crushing chamber in the lower part of the same, a hopper in the upper portion of the frame delivering into said crushing chamber, a series of spaced bars in the lower part of said hopper sewing to retard the feed, a series of adjustable rods projecting into said hopper in substantial alignment withsaid spaced bars, and a series of rotating hammers acting between said spaced bars to reduce the material lying upon the same before it reaches the crushing chamber.

10. A hammer crusher comprising a frame having a crushing chamber in the lower part of the same, a hopper in the upper portion of the frame delivering into said crushing chamber, a series of rods projecting into the. hopper and adjustable longitudinally; said rods serving to retard the feed, and a series of hammers acting with respect to said rods to reduce material intercepted thereby before it reaches the crushing chamber.

In Witness whereof I have signed this specification.

GEORGE W. BORTON.

15 with a trz said rods toward and from the ends of said and between

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