US1189471A - Crushing-machine. - Google Patents

Description

I. 138mm,

J, D. OCHTERBECK.

CRUSHING MACH-INE. APPLICANON min JAN.12.1914.

,Patented July 4, 1916.

Jenn D. ocnrnnnncx, or CLAYTON, Missoonr.

CRUSHNG-MACHIN.

specificati .ofI iters atent,

appueauon ana January 12, 1914. serial No. 811,602.

Clayton, Missouri, have invented a certain new and useful Improvement in Crushing- Machines, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appe'rtainsto make and'use the' same.

This invention relates to crushing machines, and more particularly to that class of machines that are used for crushing or pulverizing large pieces of rock, ores, or other material. In machines of this character that have heretofore been-in'use, great ditliculty has been experienced because of the constant breaking of the hammers, and the general practice has been, in order to partially `obviate this trouble, to pass the material through the machine several times in order to reduce it to very small particles. This method, while preventing to some' extent the breakage of the hammers, necessitates an vadjustment of the breaker-plate with respect to the` path of the hammers, at each operatioh, thus materially increasing the time and labor spent in reducing large pieces of material to small particles.

The main object of my invention is to provide a 'machine of the class described which is constructed in such a manner that large pieces of material may be broken or crushed into very small particles by asingle passage therethrough.

Another object is to provide a machine of the class described in which the crushing hammers are mounted in such a manner that there is no liability of thembecoining broken contact with the material being crushed. Still "another object'is to provide mav.hine'of the v' 3haracter described in which novel means is provided for yieldingly supporting Vthe breaker plate and adjusting same with'respect to the path of the crushing hammers.

A still further object is to provide a ma` chine of the class referred to that comprises Vfew simple parts that can he easily assembled or dismantled and which may be produced at a low cost of manufacture.

Other objects and desirable features oi my invention will be hereinafter pointed out.

Figure l of the drawings is an elevational view, partly in vertical section, of a crush ing machine constructed in accordance with my invention; and Fig. Q 1s a horizontal secentran estaras rafrnn'r enteren Patented July a', 19H3. l

tional view taken on the line 2 2 of Fig. l. *l

Referring to the drawings which illusf trate the preferred form of my invention, A.'

designates the casing of themachine that'is i L provided in its upper portion with ra hopper l through which the material to be operated f i n on is introduced into the machine, and at its l lower portionv with a chute 2 whereby the disintegrated material is discharged from.,l

the machine.

A shaft extends transversely through,"

the casing A and carries a` hammer support Bin which are mounted a plurality of crush-A 170 ing hammers C. The hammers C may be4 connected to the support B in various ways, I but l prefer 'to provide each of said hammers with a reduced shank o having`a curved inv,

ner end that coperates with a correspondf,

ingly-curved pocket o formed in thesupf port B. A pin 4 is preferably passedtrans-'yf versely through each of said Shanks and the,v

support B so as to pivotally connect said."l

to. retain, t

hammers to said support and also them in operative position therein.

As shown in Fig. 2, the heads c of the I I hammers C .preferably extend transversely, across the entire distance between the side walls of the casing A, and said hammers normally bear directly against abutnfientsL 5 on the support B, but under certain conditionsin service, is desirable to have said hammers yield slightly, and to accomplish this, I provide a plurality of coiled eXpanthe support B; and a member 7 of any suitable elastic material, such as rubber, is pret-v erably arranged inside of each of said springs for purposes hereinafter appearing.v

The hammers C are adapted to rotatein the direction indicated by the arrow in Fig,

.90.. sion springs 6 that are arranged between l the rear edge of each of the hammers C and uitl l operate with the inclined face e of a vertitimes.

cally adjustable member E. A plurality of curved ribs e are arranged on the rear wall of the member E and coperate with correspondingly curved ribs a integrally arranged on the vertical end wall of the casing A; ,and said member E is also provided with one ormore horizontally-disposed lugs 9 to which adjusting rods 10 are secured, said rods extending upwardly through the top wall of the casing A' and being provided at their upper ends with an adjusting nut ll that bears against said top wall.

'IVhenever it is desired to change the position of the breaker-plateD with respect to the path of the hammers C, the adjust` ing nut 1l is rotated so as to either raise or lower the member E, thus causing the breaker-plate to swing about the pivot 8. The angle of the meeting faces of the member E and the plate D, of course, changes with such adjustment, and the member E tilts or rocks about the curved rear bearing thereof, thus compensating for the change of angle of the breaker-plate bearing surface, and insuring a perfectly fiat bearing between said plate and the member E at all In order to prevent the breaker-plate from breaking when subjected to an unusual shock, I provide means whereby said plate can yield or give slightly at such a time, and, to this end, I form the member E of two separate and distinct parts e2 and e3 that are normally held spaced apart by a plurality of coiled expansion springs l2. Each of the parts e2 and e3 is provided with laterally projecting overlapping flanges e4 that coperate to hold said parts in operative relationship and which permit of movement toward or away from each other.

By ,constructing the breaker-plate and its supporting structure in the manner just described, the liability of said plate becoming broken in service is reduced to a minimum, and said plate can be easily and quickly adjusted from'a point outside ofthe casing of the machine.

In operation, the material to be crushed is introduced onto the breaker-plate Dl through the feed-hopper 1, and the rapidlyrotating hammers C come into `successive contact therewith, crushing said material 'and discharging the same from the machine by means of the chute 2.` The springs 6 and elastic members 7, which are -placed in' position behind the hammers C when under tension, only7 come into service when the4 hammers come into contact with the matic member T will yield and permit the hammer to aemain momentarily stationary with respect to the support B, but on the reaction oi` said hammer, it will strike `the piece of material with greater force than the initial impact, owing to the fact that the expansion of the springs and elastic members is added to the constant speed of the hammer-support B. In other words, the support B is constantly rotating at a certain speed when in service, and if one of the hammers carried by said support is momentarily brought to rest by contact with a hard piece of material, it must necessarily go forward after said stop at a greater speed than before in order Ato catch up to the speed of the support B. The force of the reactive blow of said hammer is consequent-ly greater than the initial impact, because of the additional speed and the additional power exerted b v the compressed springs 6, the result being that large pieces of material being operated on are shattered and reduced to very small particles by a single passage through the machine.

By employing the combination kof the springs 6 and the contained elastic members 7, the hammers C are caused to operate against the great resistance offered by said metallic springs, upon encountering a piece of material that resists their initial impact, but upon the reaction, are acted upon immediately by the elastic members 7, as it has been found in actual practice that these members 7, formed of rubber or like material, will expand much more quickly than a metallic spring, and will therefore cause the hammers C to give a sharper blow on v such a manner as to reduce to a minimuml the liability of breakage thereof, and it can be produced at a low cost of manufacture. l

I am aware that many minor changes may be made in the construction and arrangement' of parts constituting my invention without departing in the leastfrom thev spirit thereof. l g l Having thus described my, invention, what I claim as new and desireto secure byv Letters Patent is:

1. In a crushin machine, a rotary hammer support, a p urality of hammers pivotally mounted in said support, said support havingintegral abutments thereon that 'limit the pivotal movement of said hammers in one" direction, and resilient means that limit the movement'm the opposite directioi, each of-said resilient means comprisv, ,part y fyielding devices, said wedge hav- .nice interposed between the rear edge o vlng one ace bearing against the inclined rear-. face of said breaker-plate andV its opposite face bearing against the end wall of the machine.. f

. 3; In a crushing machine, a rotary crushing element comprising a `solid one-piece hammer support, la plurality of pockets'arranged in said head, crushing hammers provided with reduced shanks that are pivotally mounted in said kets, rigid means in vsaid kets}that linuts the iv'otal movement o said hammers in one irection, and resilientI means in said pockets that limits the movement inthe op osite direction.

4. Ina crushing mac ine, a rotary one piece hammer support provided withja lurality of substantially semi-circular poc a cmshinghammerrmounted -in each olf-said pockets, t mer being normally in enga ement with one end wall of said pocket, an a .yieldi diei sa hammer and the opposite end of said pocket. i

.5. In a crushing-machine, a rotary crushe advancing edge of said hain-v this seventh day of Janna ing element, a breaker plate arran d adi one end wall provided with a plurality ofv curved ribs, a breaker plate having one end pivotall mounted in said machine adjacent said en wall, a yielding wedge interposed between said breaker plate and said curved ribs, and. means for causing said wedge to-` rock about said curved ribs.

7. In a disintegrating machine, a horizontally mounted rotating member and an opposing jaw, the upper face of said working jaw being provided with retarding projections and the lower portion with a grinding surface,'said rotating member being provided with pivotally mounted heads, said heads having shock absorbing means.

In testimony whereof I hereunto aiiix m-y signature in the presence of two witnesses,

ry, 1914. JOHN D. OCHTERBECK. Witnesses:

Gnonon BAKEWELL, Gro. R. LAnsoN.

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