US691339A - Rock or ore breaker. - Google Patents

Description

Patented Jan. l4, I902.

. No. 653L339.

A. J. GATES 8. L W."CAPEN. Bock on'one BREAKER.

(Application filed. may 28, 1900.)

(No Model.)

ATTORNEY WITNESSES Tn: mums Pmns 00., marouma, wnsumo'rcn. D4 c.

rte mares ALBERT J. GATES AND THOMAS W.

CAPEN, OF CHICAGO, ILLINOIS, AS-

SIGNORS, BY MESNE ASSIGNMENTS, TO ALLIS-CHALMERS COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

f ROCK OR ORE BREAKER.

SPECIFICATION formingpart of Letters Patent No. 691,339, dated January 14, 1902.

Application filed May 28,1900.

To all whom, it may concern.-

Be it known that we, ALBERT J. GATES and THOMAS WV. CAPEN, of Chicago, Illinois, have invented certain new and useful Improvements in Rock or Ore Breakers, of which the following is a specification.

The invention relates particularly to that class of ore breakers and crushers known as gyratory crushers, and especially to the means for holding the spider for journaling the upper end of the gyratory shaft, all of which will be more fully hereinafter set forth.

The principal object of the invention is to provide an ore-crusher of the gyratory type with a simple, economical, and efficient spider for journaling the upper end of the gyratory shaft, which shall be free from all shrinkage strains and which can be easily and rigidly fastened in operative position; and the invention consists in the features, combinations, and details of construction hereinafter described and claimed.

The accompanying drawing represents a perspective view of a spider constructed in accordance with our improvements shown in full lines, combined with and shown in operative position with the upper portion of the frame, which for convenience is shown in dotted outline.

In the art to which this invention relates it is well known that great difliculty is encountered in fitting the spider to the upper portion of the frame in that no matter how carefully the upper portion of the frame is turned or bored and the spider is turned or bored even with the use of the most accurate gages there is always great difficulty in fitting the spider thereto in such a manner as to absolutely insure the alinement of the axis of the hub of the spider with the axis of the hub of the crushing-frame and at the same time being able to maintain such perfect joint that under the working strain of the machine the joint will not become loose and the parts destroyed by such lost motion. Heretofore in order to insure a tight fit and one that may be maintained between the spider and the upper portion of the frame it has been common practice to make the rim Serial No. 18,240. (No model.)

the top of the frame by from one-quarter to one-half inch, thus allowing the bolts which secured the spider to the top of the frame to draw the spider down into the taper fit securely and to maintain this joint by merely keeping the bolts tight. This arrangement,

which will readily be seen, necessitated the accurate spacing between the lugs on the spider and'the lugs on the upper part of the frame through which the'securing-bolts were passed in order thatthe axis of the bore in the spider should be coincident with the axis of the machine, and if this were not accurately done the bearing for the shaft in the spider would not be perpendicular, and the shaft would bind in its journal.

It is also well known that in the ordinary spider, which consists of the central hub for journaling the crushing-shaft and of arms connecting this hub with the rim of the spider, it is very difficult to overcome the'shrinkage strains so as to prevent the rim of the spider breaking at a point where the arms connect with same, and also to prevent the hub of the spider cracking between the points where the arms connect.

The principal object of our in vention,there fore, is to provide a crusher with a spider of such construction and arrangement that there can be no shrinkage strains set up in the casting and that the partial rim or feet of the spider may have a turned seat on the top portion of the main frame, thereby insuring perfect alinement of the axis of the spider and the axis of the machine, and so that the arms may be easily sprung and fastened securely into position, and which can at the same time be easily removed for the purpose of repair to any parts of the crusher which may become necessary.

In illustrating and describing our improvements we have only illustrated and described that which we consider to be new, taken in connection with so much that is old as will properly disclose the invention and enable those skilled in the art to practice the same,

leaving out of consideration other and wellknown parts, which if described here would only tend to confusion, prolixity, and ambiguity.

In constructinga crusher in accordance with our improvements we use a crusher which is provided with any of the usual frames, and particularly with the upper frame a, as shown in dotted outlines. The upper portion 1) of this frame is turned the desired size and provided with a shoulder formed by a flange c to receive the spider, as hereinafter described.

In order to provide mechanism or a spider that will obviate the above difficulties, we make a spider comprising a hub d, which is bored out the desired diameter to receive and furnish the upper bearing for the gyratory shaft, (not shown,) which is provided with two or more arms, but shown in the drawings with three arms 6 e e, each of such arms extending out from the hub and downwardly therefrom. The lower portions of these arms are provided with sector-shaped lugs or feet j, which are bored on the inside of a diameter equal to the portion 19 of the shell and turned off on the bottom side to rest against the shoulder c.

From the foregoing it will be seen that when the parts are in position and the hubbored the spider may be easily removed therefrom or returned in position at any time or times, all that is necessary to accomplish this result being to slightly and equally spring the arms of the spider into position. It will further be seen that since the rim of the spider is not continuous,shrinkage strains are done away with entirely at this point, and, further, that there can be no shrinkage strains on the hub of the spider, for the reason that the arms are not held by the rim so as to create such strain.

The spider feet or legs are bored transversely to receive bolts g, which extend through the same and through grooves h in the shell and act to hold the parts firmly in position. These feet are also bored longitudinally, as at 2', and also the shoulder of the upper portion of the frame, to receive bolts, which also act to hold the spider against rotation.

There are many advantages incident to the use of a crusher fitted with our improvements, the principal ones being the ease with which the spider may be made and fitted into position, so as to bring about a positive alinement of the axes of the spider-hub and crusherframe, andthe absence of shrinkage strains on anypart of the spider.

We claim 1. In a rock and ore breaker, the combination with the crushing-chamber wall of a shoulder upon the wall of the crushiug-chamher, a spider comprising a heavy cast stationary hub and heavy T-shaped arms integral therewith which extend independently outward beyond the rim of the crushing-chamber and are seated upon the shoulder thereon, and means for fastening the ends of the arms firmly in position, substantially as described.

2. In a rock and ore breaker, the combination with the rim of the crushing-chamber of a shoulder upon the rim, aspider comprising a heavy cast stationary hub and heavy arms integral therewith which extend independently outward beyond and are snapped to the rim of the crushing-chamber and seated upon the shoulder thereon, and means for firmly fastening the ends of the arms in position, substantially as described.

3. In a rock and ore breaker, the combination with the crushing-chamber wall of a shoulder upon the wallof the crushing-chamher, a spider comprising a heavy cast stationary hub and heavy arms integral therewith which extend independently outward to the wall of the crushing-chamber and downward to the shoulder thereon and are seated within the recess formed by the shoulder and crushing-chamber wall, and means for attaching the ends of the arms firmly to the shoulder and wallrof the crushing-chamber, substantially as described.

ALBERT J. GATES. THOMAS W. CAPEN.

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