US2339628A - Crusher - Google Patents

Description

Jan. 18, 1944. o. J. FEIGHT 7 2,339,628

CRUSHER Filed Oct. 23, 1942 2 Sheet-Sheet l OSCAR J. FEIGHT,

HTT'Y Jan. 18, 1944. -o. .1. F E|GHT 2,339,623

CRUSHER Filed Oct. 23, 1942 2 Sheets-Sheet 2 //V|/ENTO/2 OscAE J. FEIGHT,

Patented Jan. 18, 1944 CRUSHER Oscar J. Feight, Columbus, Ohio, assignor to The Jeffrey Manufacturing Company, a corporation of Ohio Application October 23, 1942, Serial No. 463,049

5 Claims. (CI. 83-11) This invention relates to a crusher and an object of the invention is to provide a crusher of improved flexible, rugged, simple construction Still another object of the invention is to provide a rotor having improved end member or end plate construction providing for the ready adjustment of the distance between the axis. of

rotation of the rotor and the crushing members,

including relatively rotatable discs and ring members.

A further object of the invention is to provide means for readily inserting and removing rollers in the end plates or end members of a rotor of a crusher.

' Other objects of the invention will appear hereinafter, the novel features and combinations being set forth in the appended claims.

In the accompanying drawings,

Fig. 1 is a front elevational view of the crusher of my invention;

Fig. 2 is a side view of said crusher;

Fig. 3 is a transverse sectional view of the crusher;

Fig. 4 is a sectional View of the crusher taken along the axis of the rotor;

Fig. 5 is a sectional view taken on the line 5-5 of Fig. 4; I

Fig. 6 is a view of one of the end members or end plates with the inner disc, removed;

Fig. 'Tis a detailed view showing one of the end discs and taken at right angles to the axis of the rotor;

Fig. 8 is a view similar to Fig. 5 of a modified rotor structure; and r Fig. 9 is a sectional view of a portion of the modified rotor structure illustrated in Fig. 8.

The invention herein disclosed incorporates a number of the features disclosed and claimed in the application of John T. Fowler, Serial No.

391,538, filed May 2, 1941, entitled Crusher, as to which this invention constitutes an improvement in a number of respects.

Referring particularly to Figs. .1, 2, 3 and 4 of the drawings, it will be seenthat'the crusher comprises a casing or housing Ill which may be mounted upon a foundation l I, the casing II] including a bottom or base portion I2 having a bottom discharge opening which is provided with an arcuate bar screen l3 comprising a plurality of transversely or, axially extending wedge shaped bars l4 rigidly attached to arcuate end bars l5 which are received in arcuate grooves l6 formed in the side plates of'the base I 2. The bar screen I3 at one end abuts a combination breaker and bumper plate I] (see Fig. 3) against which it is rigidly held, by removable set screws, one of which is seen at is.

The housing or casing l0 also includes a top or upper frame portion [9 rigidly but removably attached to the bottom or base frame portion l2 asby nuts and bolts. The upper frame portion i9 is provided with a material receiving throat 20 which is preferably provided on all of its interior walls with removable liner plates 2|. The throat 20 leads to a reducing chamber 22 within the housing 'or casing l0 within which there is provided a material reducing rotor 23, the structure of which shall be described hereinafter in complete detail and which contains important features of my invention. A removable access door 24 is provided which permits access to the interior ofthe housing I0 and to the rotor 23 and reducing chamber 22.

Attention is now directed particularly to the structure of the rotor 23. Said rotor 23 includes a shaft 25 mounted on spaced anti-friction bearings 26, 26 which bearings are carried upon pedestals formed on the bottom or base frame l2. The shaft 25 also preferably carries a fly wheel 21 which is keyed thereto. The central portion of the shaft 25 is enlarged forming spaced abutments against which abut collars 28, 28 which are rigidly attached to and form part of a pair of similar end members or end plate structures, each of which comprises an outer circular disc 29 which is rigidly attached as by welding to the collar 28, said collar 28 being keyed to the shaft 25. Rigidly attached adjacent the outer circumference of each disc 29 and on the inner face thereof and concentric with the axis thereofand of the axis of shaft 25, is a broken ring (see Fig. 5) formed by arcuate segments 30,

preferably welded permanently to the disc 29, and

removable segments 3| which extend radially through the ring, preferably removably bolted or screwed to said disc 29 to provide for the ready insertion and removal of the crushing rollers 32,

'of which rollers 32 I have illustrated three, built into the complete rotor 23, the structure of each of which will be described more completely hereinafter.

Mounted loosely over each collar 28, 28 and removablyattached to associated plate 29 is a mutilated disc 33 which substantially fits within the lateral confines of the ring 3Il3|. Disc 33 may be rotated about the axis of the shaft 25 to assume any one of a plurality of operative positions and may be held in any selected position by means of nuts and bolts 34 which may extend through selective holes 35 and 36 associated with the disc 33 and the disc 29, respectively. The two discs 29 and 33 cooperate to provide end bearing means to hold the crushing rollers 32 in proper axial position since said rollers 32 are provided at opposite ends with spaced trunnions 31, the outer ends of which are preferably spherical to provide bearing surfaces contacting with said disc 29 of the end members or end plates.

One feature of the invention is the provision of means whereby selective bearing surfaces are provided so that the maximum outer diameter of rotation of the crushing rollers 32 may be variably adjusted or, in other words, so that the minimum distance between the rollers 32 and the inner surface of the bar screen I3 may be adjusted, thereby to adjust the fineness to which the material is ground within the reducing chamber 22. To this end each of the inner discs 33 is provided with three generally pear shaped notches 38, one for each of the rollers 32, which notches are made of suflicient depth to allow the rollers 32 to release under the compacting influence of the material being crushed as disclosed and claimed in the above mentioned application of John T. Fowler. The variable determination of the clearance between these rollers 32 and the screen I3 is provided by virtue of the fact that the notches 38 may be adjusted to any one of a plurality of operating positions relative to the ring 3ll3| and each of the segments 3|) of said ring 3ll-3I is provided with a plurality of hearing surfaces, there being three such bearing surfaces illustrated for each segment 39. For example, in the position of the parts illustrated in Fig. 3 of the drawings the notches 39 are opposite the arcuate notches 39 in the segments 39 and these notches 39 provide bearing areas on the interior of the segments 39 which are positioned a maximum distance from the axis of the shaft 25. When the parts are in this position a minimum of clearance is provided between the crushing members or rollers 32 and the screen I3. If the discs 33 are now rotated so that the notches 38 are opposite arcuate notches 49, which condition is illustrated in Fig. of the drawings, it is obvious that a greater clearance will be provided between the rollers 32 and the screen I3 and the notches 41'! provide bearing surfaces for the trunnions 3? of the rollers 32 similar to the notches 39 excepting that these bearing surfaces are closer to the axis of the shaft 25. In a third position of the discs 33 relative to the ring 30-3I the trunnions 31 are adjacent a bearing surface 4| which is a bearing surface formed on the inner surface of each segment 30 of ring 3i|-3I. In this position it is evident that a maximum clearance is provided between the rollers-22 and the bar screen I3.

It is, of course, evident that the relatively adjustable discs 29 and 33 may be locked in any adjusted position by the nuts and bolts 34, and by the removal of said nuts and bolts their relative rotation about the axis of the shaft 25 is effected. To provide for ready removal of the rollers 32 is the function of the removable segments 3|, for by adjusting the notches 38 to align with the segments 3| and then by removing said segments 3| each of the rollers 32 may be readily lifted radially outwardly.

To provide for the ready adj s of the discs 33 relative to the ring 3D3I or disc 29, each of said discs 33 is preferably provided with peripheral notches 42 into which an'adjusting tool may be inserted.

In Figs. 8 and 9 of the drawings I have illustrated a modification of the rotor structure. In this modified rotor structure I have substituted a'pair of spaced discs 43 for the previously described discs 33 and the discs 43 are mounted for rotation upon the disc 29 and collar 28. In this modified form discs 43 are permanently connected together by tube 44 which surrounds the shaft 25 and. extends between the discs 43 and is welded thereto at each end so that the two discs 43 will always rotate in unison insuring their proper axial alignment and also providing for their simultaneous rotation when either is rotated. Fundamentally the disc 43 is the same as the disc 33, however, in addition to the modification above mentioned the disc 43 differs fromrthe disc 33 in that I have eliminated notches 42 and substituted blocks 45 which are welded to discs 43 and are adapted to receive a tool for adjusting said discs 43. It is further to be noted that instead of the ring 30-3I with the three removable segments 3 I, above described, I have provided a ring 46 which is welded to the disc 29 and which is continuous except for a single removable segment 41. The segment 41 has a double function. In the first place by its removal it provides for ready removal of the rollers 32 by successively aligning the notches 38 therewith. In addition the segment 41 has an extension 48 which extends into anyone of three locking notches 43 provided in each disc 43 to lock said discs 43 in proper position for each of the three positions of adjustment thereof, thereby providing for the three different displacements between the rollers 32 and the screen I3, as above described. I

The manner of adjusting the maximum clearance between the rollers 32 and the screen I3 in the modification illustrated in Figs. 8 and 9 of the drawings is believed obvious from the above description of the other embodiment of the invention. In the operation of the device of either form, material will be fed to the throat 20 and will be struck by the crushing rollers 32 of rotor 23. As the rotor 23 rotates in the direction of the arrow seen in Fig. 3 of the drawings, the consequent reduction which takes place in the reducing chamber 22 'may cause the rollers 32 to release and move radially inwardly as they are free to do to a limited extent because of the enlarged notches 38. The material as it is reduced will pass through the screen I3 and out of the bottom of the crusher. If it is desired to adjust the clearance between the rollers 32 and the screen I3 this may be done by rotating the discs 33 or discs 43 to new positions so that notches 38 are opposite notches 39 or 40 or bearing surface 4| inaccordance with the desire of the operator. It is also possible, of course, to replace the screen I3 by a screen of different mesh if this is desired in combination with the aforementioned clearance adjustment. It is evident that the rotor structure which I have provided is quite flexible because of the adjustment I have provided and yet it is very rugged in construction and simple in its adiustability.

Obviously those skilled in the art may make various changes in the details and arrangement of parts without departing from the spirit and scope of the invention as defined by the claims hereto appended and I therefore wish not to be restricted to the precise construction herein disclosed.

Having thus described and shown an embodiment of my invention, what I desire to secure by Letters Patent of the United States is:

l. A rotor structure for a crusher including spaced end plates mounted on a rotor shaft, axially extending crusher members having trunnions supported at opposite ends on said end plates, said end plates having bearing forming members for receiving said ends and providing for variations in the maximum radial distance between the axes of said crusher members and the axis of said rotor shaft, each of said bearing forming members including a ring on an end plate concentric therewith and a disc also on said end plate, said ring and plate having adjacent generally circular edges, said ring having arcuate notches providing bearing surfaces spaced different distances from the axis of said rotor and opposite bearing surfaces formed in notches in said disc, the bearing surfaces in said ring being selectively adjustable to be selectively aligned with the notches in said disc, the aforesaid adjustability of said bearing surfaces being provided by means for rotating said disc relative to said ring.

2. A rotor structure for a crusher including spaced end plates mounted on a rotor shaft, axially extending crusher members supported at opposite ends on said end plates, said end plates having bearing forming members for receiving said ends and providing for variations in the maximum radial distance between the axes of said crusher members and the axis of said rotor shaft, each of said bearing forming members including a ring on an end plate concentric therewith and a disc also on said end plate, said ring and plate having adjacent generically circular edges, said ring having arcuate notches providing bearing surfaces spaced different distances from the axis of said rotor and opposite bearing surfaces formed in notches in said disc, the bearing surfaces in said ring being selectively adjustable to be selectively aligned with the notches in said disc.

3. A rotor for a crusher comprising a pair of circular end plates, crusher means extending between said end plates and mounted on bearings therein, a ring attached to an end plate concentric therewith and adjacent its outer diameter, the interior surface of said ring providing spaced bearing surfaces, a disc removably attached to an end plate and fitting within said ring and having spaced bearing surfaces cooperating with said ring bearing surfaces to support said crusher means, means mounting said ring and disc for relative rotation about their aligned axes, and a removable piece extending radially through said ring providing for removal of said crusher means, said removable piece having a tongue projecting into a recess in said disc normally to hold them against relative rotation,

4. A crusher rotor comprising end members mounted for rotation on a rotor shaft, crusher mechanism extending parallel with said shaft and between said end members, and a plurality of bearings on each end member adapted selectively to receive said crusher mechanism, said bearings being radially spaced different distances from the axis of said rotor, said bearings comprising split members formed by opposed notches on outer and inner relatively rotatable members attached to said end members, the notches on said outer member being arcuate.

5. A rotor for a crusher comprising a pair of end plates, crushing rolls extending between said end plates and having end trunnions mounted in bearings carried by said end plates, a ring attached to each end plate and having spaced arouate bearing surfaces formed on the interior thereof, a disc attached to each of said end plates and fitting within said ring, said disc having peripheral notches each notch being adjustable to align with any one of a plurality of said arcuate bearing surfaces of said ring, said notches and arcuate bearing surfaces forming bearing surfaces for the trunnions of said crushing rolls.

OSCAR J. FEIGHT.

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