US1520202A - Crusher - Google Patents

Description

Dec, 23,' 1924. D. J.' NEVILL cRUsHER y Filed May 28, 1920 2 Sheets-Sheet 2 Q Q Se o l o l\- b d f Il Ian' f Jini' Q W n lo INVENToR. D J NE w1. L.

Patented Dec. 23, 1924.

UNITED STATES DAVID J'. NEVILL, OF DENVER, COLORADO, ASSIGNORTO THE STEARNS-ROGER MANU'- N Lszazaz PATENT orf-Fica.

FACTURING COMPANY, A CORPORATION OF COLORADO.

CRUSHER.

Application led May 28, 1920. Serial No. 384,884.

To all whom t may concern.'

Be it known that I, DAVID J. NEVILL, a subject of George V, King of England, residing at Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvements in Crushers, of which the following is a specication.

This invention relates to improvements in crushers of the type in whichA a pivotally suspended jaw has a reciprocating motion opposite to a relative stationary jaw and its primary object is to provide in a crushing machine of this character, means for transferring the thrust of the moving jaw to an end of the frame on which the cooperating parts of the crushing mechanism are assembled, whereby to relieve the body of most of the strains resulting from the crushing pressure.

Another object of the invention is to provide by the application of the thrust transferring means above referred to, an effective and readily operativemedium for adjusting the distance between the crushing jaws to compensate for wear and to allow of varying the size of the product of the machine, and still another object is to so arrange the parts of the thrust transmitting and jaw-adjusting means that in case of breakage of any part thereof the movement of the moving jaw will not react upon the supporting frame.

I obtain the above objects by providing the frame of a crushing machine of the type above referred to, with a slidway open at an end thereof and mounting in said slideway a cross-head which receives the thrust of the moving jaw through the usual toggle movement and which is connected to the opposite end of the supporting structure by means of a pair of parallel side rods. Nuts on the rods provide convenient means for varying the distance between the crushing jaws by adjustment of the cross-head in its slide-way for the purposes hereinbefore described.

An embodiment of my invention has been illustrated in the drawings accompanying l and forming part of this specification, in the two views of which coresponding parts have been designated by similar characters of reference and in which-ff Fig/ure l represents a vertical longitudinal,

section through a jaw crusher to which my improvements are applied;

Figure 2, a horizontal section taken on the line 2 2, Figure 1, and

Figure 3, an enlarged sectional elevation of the end of one of the toggles and its seat,

The crushing machine as shown in the drawings consists of a supporting frame having in integral connection, parallel side members 5, a cored front end member 6 and a rear end member consisting of top and bottom parts 7 and 8 which are spaced in. parallel relation to form a slide-way for the cross head 16. l

The essential operating mechanism of the crusher comprises a stationary jaw 9 rigidly mounted upon the front end member of the supporting frame, a movable jaw 10 pivoted at its upper end in bearingsjon the side members of the same and an actuating mechanism'for the movable jaw consisting ofthe shaft 12 eccentrically supported in boxes on the side members of the frame', a pitman 13 suspended from the shaft and toggle members 14 and 15 loosely engaging with preferably semi-cylindrical convex seats at opposite sides of the lower end of the pitman and bearing respectively upon similarly formed seats on the movable jaw and the sliding cross-head.

The movable jaw is rovided with a hard metal wear plate 29, w ich is secured at its lower end by means of a projecting dovetail lug 28 fitted in the lower portion of` an elongated recess 27 of the jaw. Angular indentations 30 in the upper and lowerends of the wear plate. each provide a seat for a block 31 which by means of a bolt 32 extending through an aperture in the body portion of the jaw, and a nut 33, secures the upper end of the plate against displacement. A second dove-tail lug 28a at an equal distance from the opposite end of the wear plate extends loosely in another recess 27a of the jaw. and its function is to secure the wear plate at its lower end in a reversedposition.

The cross-head consists in its preferred form of` a channeled body member 17 having at its opposite ends grooves' to admit the rods 18 by which the cross head is connected to the front end of the frame, A block 19 removablymtted is @as haar member bithesa fel-0 head has a longitudinal recess in its forward side and carries in said recess a reinovable bearing strip 2O which provides the above mentioned seat for the toggle meinber l5.

The cross-head is slidably fitted in the open-ended slide-way formed between the side members and the upper and lower sections of the rear end member of the supporting frame for its unobstructed movement in either direction.

The rods 18 extend loosely through openings in the front member of the frame and through the grooves at the ends of the crosshead, and they are threaded at their other ends for the application of nuts 2l and 22. The loose connection between the rods and the cross-head thus provided permits of the cross-head disengaging itself from the other rod should, in the operation of the inachine, the other rod be broken.

The nuts 2l screwed upon the ends of the rods at the front of the machine are set partially in recesses to prevent their rotation and the nuts 22 screwed upon the opposite ends of the rod against the back of the crossshead are connected by a locking bar 23 which prevents-.their displacement after the cross-head has been adjusted to its position in which the crushing jaws are the proper distance apart.

The locking bar consists in its preferred form ofza rod the end portion of which is bent at right angles to be inserted in sockets formed in the sides of the nuts as shown in Figure l of the drawings.

The operating parts of the machine are as usual maintained in their relative positions .by tension rods 24 and buffer springs 25 cooperating therewith to yieldingly oppose the 'operative movement of the swinging j aw.

In the operation of the improved crushing machine the eccentric shaft is rotated by power applied to a'pulley 26 causing an up `and downward movement of the pitinan which through the instrumentality ofthe toggles Vi-s converted into a reciprocating motion of the swinging aw.

The material'to be crushed isfed between Ythe .jaws and passes through the space be- .tween the low r ends thereof after having been reduced to the desired lineness.

The thrust of the swing-ing jaw due to its reaction during the crushing operation is received by the Sliding cross-head which in turn transfers it to the front end of the supporting frame through the medium of the rods thereby relieving the body of the Ytrame from the strains to which it would ordinarily be subjected by the crushing pressure of the operating mechanism.

By turning` thenuts 22 upon thev threaded rear ends :ofthe rods the sliding cross head may be 1adjusted to vary the distance between the crushing jaws for thepurpose of taking up wear or changing the size of the product of the machine, it being understood that after the adjustment has been made the locking bar fastens the nuts against further displacement.

ln case of breakage of any part of the thrust-receiving and transmitting element of the machine the cross-head is merely pushed rearwardly in and through the open ended slide-way in which it works, thereby preventing undue strains and ultimate damage to the supporting structure as may readily occur when the frame receives the entire crushing pressure.

lvVhat l claim and desire to secure by Letters Patent is:

l. ln a Crusher, a frame having slide ways7 a movable jaw,v an abut-ment mounted in said ways to slideby a stress on said jaw. a toggle movement operating the j awby reaction on the abutment, and rods connecting the sliding abutment to the opposite end of the frame. Y q

2. ln a Crusher, a frame, a movable jaw, an abutment grooved at its ends and slidably mounted at an end of the frame, rods loosely held in said grooves and connected to the opposite end ofthe frame, and a toggle Inoveinent operating th-e jaw by reaction on the abutment.

3. ln a Crusher, the combination with a rcciprocatory jaw and a rotary driving ele* ment, of a toggle for the operation of the jaw by movement of said element, including` a niovement-transmitting member having a tlat end-face and a seat having a ridge in Contact with said face along a relatively transverse straight line.

4. In. a crusher, the combination with a reciprocatory jaw and a rotary driving elcment therefor, of a toggle for the operation of the jaw by movement of said element including a movement-translnitting member and a scat for said member, having a str transversely rounded ridgeV in Contact with said face along a yrelatively transverse straight line.

5. ln a jaw Crusher, the combination with a stationary jaw, of a jaw comprising a niova-bly mounted body having a fa e opposed to the working face of the stationary jaw, a wear plate resting against said face o said body and covering the same inclusive of the lowerinost edge thereof, and means for fastening the plate to the jaw body at the upper end of the plate7 the plate having a dove-tailed lug projecting from its rear ward lface in spaced relation to the lower edge thereof, and the jaw body having in its forward face with which the plate engages, a correspondingly shaped recess adapted to admit the luO'.

6. In a aw Crusher, the combination with a stationary jaw, of a jaw comprising a niovably mounted body having a face oppo llD site to the Working face of the stationary jaw, a Wear plate resting against said face of said body and covering the same inclusive of the lonf'erlnost edge thereof, and means for fastening the plate to the jaw body at the upper end of the jaw, the plate having 'dovetailed lugs projecting from its rearward face in spaced relation to the upper and lower ends thereof and the jaw body having in its forward face' with which the plate engages, correspondingly shaped recesses adapted to admit the lugs.

In testimony whereof I have affixed my signature.

DAVID J. NEVILL.

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