US2449746A - Wear plate for jaw crushers - Google Patents

Description

P '1, 1948. R. P. KINKEL WEAR PLATE FOR JAW CRUSHERS Filed May 6, 1944 2 Sheets-Sheet l PWOR ATTORNEY se gzl, 1948.

Filed May 6. 1944 R. P. KINKEL WEAR PLATE FOR JAW CRUSHERS 2 Shets-Sheet 2 ATTOR EYS Patented Sept. 21, 1948 WEAR PLATE FOR JAW CRUSHERS Revere P. Kinkel, South Porcupine, Ontario, Canada, assignor to Buffalo Ankerite Gold Mines, Ltd., South Porcupine, Ontario, Canada Application May 6, 1944, Serial No. 534,401

1 Claim. 1

This invention relates to improvements in jaw crushers of the type commonly used for crushing ore, stone or the like. In crushers of this type, it is customary to provide the jaws of the crusher with removable wear plates of special steel alloys capable of resisting for considerable periods of time the abrasion and wear due to the material which is being crushed, and replacing ofthese wear plates is a considerable item of the expense of maintaining and operating these crushers.

One of the objects of this invention is to provide removable wear plates of improved construction by means of which the life of these plates is materially increased. It is an object of this invention to provide means of improved construction for mounting the wear plates on the jaws of the crusher. Other objects and advantages of this invention will appear from the following description and claim.

In the accompanying drawings:

Fig. 1 is a top plan view of a crusher provided with wear plates embodying this invention.

Fig. 2 is an elevation thereof, partly in section.

Fig. 3 is a sectional elevation thereof on an enlarged scale on line 3-3, Fig. 2.

Fig. 4 is a fragmentary, sectional plan view thereof, on line 4-4, Fig. 3.

Fig. 5 is an elevation of the rear face of a wear plate.

My invention is applicable to any desired type of jaw crusher and, in the accompanying drawings I have illustrated by way of example, one type of crusher in connection with which my improved wear plates may be used. This crusher comprises a stationary jaw It, a movable jaw II, and opposite side frames l2 to which the stationary jaw I is secured in any suitable manner. The side frames also support a shaft l on which fly wheels l6 are mounted, and which has a suitable eccentric which moves a pitman ll up and down. The lower end of this pitman has the inner ends of two toggle links l8 and I9 connected therewith so as to permit a limited pivotal movement of the links relatively to the pitman. The toggle link [3 has its outer end pivoted on a fixed bearing or abutment device 20 suitably secured to theside frames l2, and the pitman is has its outer end pivotally engaging the lower portion of the movable jaw ll. This movable jaw has its upper end mounted to swing about the axis of a shaft 22 suitably mounted on the side frames l2. Consequently, when the shaft [5 is rotated, the pitman I! is moved up and down and through the toggle links l8 and I9 imparts a swinging movement to the movable jaw ll about the axis of the shaft 22 so that the movable jaw will move alternately toward and from the stationary jaw. This movement is greatest at the lower end of the movable jaw which approaches closest to the lower end of the stationary jaw. Consequently, as stone, ore or other material is fed between the jaws at the upper portion thereof, it will be subjected to the crushing action when the jaws move toward each other, and when the jaws move away from each other, the material to be crushed will move by gravity downwardly in the space between the converging jaws, the crushed material being discharged between the jaws at the bottom ends thereof. As a result of this action, the greatest amount of crushing is done at the lower edges of the jaws and, consequently, these lower edges are subjected to much greater wear than any other parts of the jaw, this being particularly due to the fact that the greatest movement of the movable jaw is at the lower edge thereof. Consequently, the wear plates can no longer be used when the lower edges thereof, become worn away to a certainextent, even though the greater portions of these plates remote from the lower ends may have received comparatively little wear. In order to reduce the expense of replacing these alloy wear plates, such plates have heretofore been made reversible so that after the lower edge of awear plate becomes worn to the extent that it is. no longer usable, the plate is inverted so that the worn edge becomes the upper edge of the wear plate.

In accordance with my invention, I provide each jaw with two or more wear plates and I make the lower wear plate of each jaw of such shape that its height is substantially equal to its width, thus producing square, lower wear plates 23 and 24. I have also constructed these plates so that any of the four edges thereof may be arranged at the lower ends of the jaws. By constructing the plates with four edges capable of being used at the lower edges of the jaws, a very material saving in replacement expense results over wear plates as heretofore constructed.

It is customary to provide wear plates with corrugations on the surfaces thereof which extend lengthwise in the direction of movement of the material between the jaws, so that the peaks of the corrugations of one wear plate may be arranged opposite to the troughs of the corrugations of the other wear plate. These corrugations usually extend vertically so that the ma terial may readily feed downwardly when the movable jaw is moved away from the stationary jaw. In order to ensure an uninterrupted feed of the material between the jaws regardless of which edge of a removable wear plate is at the lower edge of the jaws, I provide a novel arrangement of the corrugations 25 on the work engaging face of the wear plate 24 of the movable jaw, whereby the corrugations extend perpendicular to each edge of the square plate. As clearly shown in Figs. 1 and 3, this may be accomplished by dividing the material-engaging face of the lower wear plate 24 into four substantially equal areas. This may, for example, be accomplished by using the diagonals of the square wear plate 24 as boundaries for two sides of each zone and arranging the corrugations 25 so that in each zone they extend from an outer edge of this wear plate to the diagonal boundary lines.

Because of the fact that some of the corrugations of the wear plate 24 extend crosswise of the direction of movement of the material between the two jaws, I prefer to make the material engaging face of the stationary wear plate 23 relatively smooth and free from corrugations. The material engaging faces of the two lower wear plates may, however, have any other suitable or desired surface configurations or contour.

The lower wear plates may be secured to the jaws in any suitable or desired manner, but preferably bolts passing through holes in the wear plates are avoided on the lower wear plates because the life of these bolts is relatively short and because they must be frequently tightened to hold the wear plates securely in place. Consequently, I prefer to provide the material-engaging faces of the wear plates with recesses or rabbets along their outer edge portions with which securing means may cooperate. Consequently, the areas of the material-engaging faces of the wear plates are slightly smaller than the areas of the opposite or back faces of these plates. In the case of the wear plate 23 used on the stationary jaw ID, the lower edge of the wear plate may be supported by means of a suitable projection on which this plate may rest. This projection may be in the form of a bar 28 having a projection or lip engaging the lower edge of the wear plate, and this projecting member 28 may -be secured to the stationary jaw ID by any suitable means, such for example, as bolts 29, or the projection may be formed integral with the lower edge of the stationary jaw.

Similarly the lower edge of the wear plate 24 of the movable jaw may be held in place by means of a bar 30 secured to the movable jaw by means of bolts 3! and having an upwardly projecting lip adapted to engage in the recessed or rabbeted lower. edge portion of the movable wear plate 24. Any other means may, however, be employed for supporting the lower edges of the Wear plates 23 and 24.

Since the jaws of these crushers are generally of considerably greater height than Width, supplementary or upper wear plates 33 and 34 are provided respectively on the stationary and movable jaws of the crusher. These upper wear plates are, of course, subjected to very much less wear than the lower wear plates, and'zconsequently, the upper plates may be secured to the jaws by means of the usual bolts 35 having elongated and tapering heads. I preferably also use the upper wear plates for the purpose of holding the upper edges of the lower wear plates in place, and for this purpose, the opposite horizontal edge portions of the upper wear plates are 4 provided with recesses or rabbets which are opposite to those formed on the lower wear plates so that the work engaging faces of the upper Wear plates have projections 36 and 31 at their lower and upper edges respectively which are formed to engage the recessed or rabbeted edge portions of the upper edges of the lower wear plates. Consequently, the upper wear plate 34 in conjunction with the lower edge support 30 securely hold the lower wear plate of the movable jaw in contact with its jaw. Since these projections are provided on both horizontal edges of the upper wear plates,

these plates may also be inverted, if desired, in

case the. lower edges of these upper plates become worn.

Preferably removable wear plates are also provided at the sides of the jaws to prevent the material to be crushed from damaging the side frames l2, and in the particular construction illustrated, I have provided cheek plates or side wear plates All of improved construction which cooperate with the stationary wear plate 23 in such a manner that the cheek plates 40 andthe er in correct position. For this purpose, the cheek plates 40 are provided with edge portions adapted to fit into the recessed or rabbeted edges of the upright sides of the lower wear plate 23 and the opposite edges of the cheek plates may bear against projections ll which may be formed integral with the side frames IE.

will move by gravity into positions to urge the stationary wear plate 23 against the stationary jaw Hi. When it is necessary to replace the lower wear plate 23 of the stationary jaw, it is merely necessary to lift the cheek plates out of their normal positions and to release and remove the upper wear plate 33, whereupon the lower wear plate 23 may be lifted out of its operative position and may be turned to place another edge at the bottom of the stationary jaw. These cheek plates also protect the side frames I2 against wear and may be replaced from time to time as they become worn.

While the means described for securing the wear plates in place at their edges only are preferred, it will be obvious that any other means for securing the wear plates in place may be employed.

It has been customary to'pr-ovide the wear plates with a relatively large number of reinforcing ribs 45 on the rear faces thereof extending at substantially right angles to each other, thus forming square holes or depressions on the rear face of the wear plates between the ribs. These holes are used to reduce the weight of the expensive alloy required to make the wear jacent edge thereof, it is desirable to make the corner and edge portions of the wear plates solid or of the full thickness of the plates.

Wear plates constructed as herein described have been found to have materially more than 1 twice the life of wear plates heretofore rused' Since the cheek 1 plates 4% are necessarily of wedge shape, they 5 having approximately the same initial weight, which have only two edges that can be subjected to the severe wear at the lower edges of the jaws.

I claim as my invention:

In a crusher having a stationary jaw and a movable jaw which is movable toward and from said stationary jaw, the combination of a wear plate of hard material for one of said jaws, said wear plate being of the width of said jaw and of a height equal to said width, said wear plate having its material engaging face divided by diagonals into four areas and having corrugations in each of said areas extending substantially perpendicular to the adjacent edge of said 15 plate, to approximately said diagonals.

REVERE P. KINKEL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

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