US3129899A

US3129899A - Crusher face plate

Info

Publication number: US3129899A
Application number: US224060A
Authority: US
Inventors: Thomas A Ratkowski
Original assignee: American Brake Shoe Co
Current assignee: American Brake Shoe Co
Priority date: 1962-09-17
Filing date: 1962-09-17
Publication date: 1964-04-21
Anticipated expiration: 1981-04-21

Description

April 21, 1964 T. A. RATKowsKl CRUSHER FACE PLATE 2 Sheets-Sheet 1 Filed Sept. 17, 1962 Inventor Thomas A.Ratknw5k Zlfaa, am( .190W

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United States Patent O 3,129,899 CRUSHER FACE PLATE Thomas A. Ratkowski, Chicago Heights, Ill., asslgnor to American Bral-ie Shoe Company, New York, N.Y., a corporation of Delaware Filed Sept. 17, 1962, Ser. No. 224,060 3 Claims. (Cl. 241-291) This invention relates to a jaw plate for a jaw crusher or the like.

In crushing rock, ore and similar material, resort is frequently had to a jaw Crusher characterizedby a pa1r of jaw plates adapted to open and close relative to one another incidental to establishing crushing action on the material fed to the jaw of the crusher. It will be appreciated that the jaw plates are subjected to a great deal of abuse, and in fact the forces are so severe that there is a tendency for the metal at the working face of the jaw plate to spread or expand because of the compressive forces exerted thereon.

It has heretofore been proposed that the problem of metal expansion be alleviated by providing the working face of the jaw plate with relatively deep slots, so-called peening slots, into which the excess metal can flow to prevent warpage and distortion of the plate which would otherwise cause the plate to lose contact with the jaw plate support structure, thereby contributing to early fatigue and failure of the plate due to llexing of the unsupported plate.

The depth of the peening slots or grooves becomes important because the slots must continue to function as the thickness of the jaw plate becomes thinner due to wear. Thus, the grooves to function for the life of the plate may have to be so deep in proportion to the thickness of the plate that they structurally weaken the plate and cause premature failure, and the primary object of the present invention is to overcome this possibility by having resort to cross ties within the slots which join the ribs that are defined by the slots.

Other and further objects of the present invention Will be apparent from the following description and claims and are illustrated in the accompanying drawings which, by way of illustration, show a preferred embodiment of the present invention and the principles thereof and What is now considered to be the best mode contemplated for applying these principles. Other embodiments of the invention embodying the same or equivalent principles may be made as desired by those skilled in the art without departing from the present invention and the purview of the appended claims.

In the drawings:

FIG. 1 is a plan view of a jaw plate constructed in accordance with the present invention;

FIG. 2 is a partial end view substantially on the line 2 2 of FIG. 1, and on an enlarged scale;

FIG. 3 is a fragmentary sectional view on the line 3 3 of FIG. l;

FIG. 4 is a schematic view of a jaw Crusher;

FIG. 5 is a side view of the plate shown in FIG. l, and taken on the line 5 5 of FIG. 2; and

FIGS. 6 and 7 are sectional views respectively on the lines 6 6 and 7 7 of FIG. l, being on an enlarged scale.

In FIG. 4 of the drawing, there is depicted a general form of jaw crusher 10 having jaw structure 12 characterized by a pair of spaced

jaw plates

13 and 14 that are articulated one with respect to the other so as to establish quite large crushing forces on rocks and the like fed into the jaw 12. `law crushers of the general type involved vary in the manner of actuation, and sometimes both jaw plates are movable, but for purposes of disclosure herein the jaw plate 13 is xed and supported on a backing support 16, whereas the jaw plate 14 is supported on a movable backing support 17 for oscillation induced by an eccentric 19 operated by a fly wheel 20 in a well known manner.

As noted, the Crusher 10 is merely typical of a wide variety of jaw crushers, and it may be noted in this same connection that the jaw plates themselves are of widely variant configuration. The jaw plate of the present invention, described in detail hereinafter, may be used as the jaw plate 13 or the jaw plate 14, or configured otherwise to conform to the nature of the supports in the jaw crusher in which the present invention is to be utilized.

The jaw plate of the present invention is illustrated at 25 in FIG. 1, being generally rectangular in plan view. The jaw plate 25 includes a back 26, FIGS. 5, 6 and 7, configured to seat flush against the support in the jaw crusher, as in the manner described above.

The working face 27 of the jaw plate 25, FIGS. l and 5 through 7, includes a plurality of parallel bars or ribs 28 which are separated by peening slots or grooves 30. In the form of the invention illustrated in the drawings, the ribs are approximately five times the width of the slots.

As noted above, the slots 30 are present in order that the flow of metal at the working faces of the crusher ribs can flow thereinto so that the plate does not expand or warp resulting in unseating at the back of the plate relative to the support, such as the

jaw support

16 or 17 identified in FIG. 4. Advantageously, the working ribs in the present instance have working faces of triangular shape characterized by downwardly and inwardly sloping

sides

28A and 28B, FIGS. 2 and 3, but in this respect it is common practice to resort to various forms of geometry for the working faces of the ribs depending upon the type of crushing action involved, as is well known in the art. For example, trapezoidal sections and rounded working faces are quite common.

It is advantageous that the peening slots be as deep as possible, and in the present instance extreme depth is achieved without apprehension of weakening the plate by affording tie bars 35 in the slots, these being cast integral with the entire structure, which itself is a one-piece casting, preferably of manganese steel. Thus, the tie bars 35 originate at the bottoms of the grooves 30, and interconnect opposed

sides

36 and 37 of adjacent ribs 28 as indicated in FIG. 3.

Maximum strength is achieved by spacing the tie bars alternately in adjacent slots. Thus, as shown in FIG. l, the tie bars 35-1, 35-2 and 35-3 in the extreme righthand peening slot 30-1 are spaced to lie between the tie bars 35-4 and 35-5 of the next inner peening slot 30-2, but are aligned with the tie bars 35-6 and 35-8 in the peening slot 30-3 that is next to the left of the peening slot 30-2. This pattern is repeated throughout the length and width of the jaw plate.

It will be seen from the foregoing that the present invention makes it possible to provide peening slots of maximum depth in a jaw plate of the character described, such being achieved by providing transverse tie bars within the peening slots having the ends thereof cast integral Wit-h the opposed sides of adjacent jaw ribs. Resultantly, the peening slots will continue to function substantially for the working life of the plate. Hence, while I have illustrated and described a preferred embodiment of my invention it is to be understood that this is capable of variation and modification, and I therefore do not wish to be limited to the precise details set forth, but desire to avail myself of such changes and alterations as fall within the purview of the following claims.

I claim:

1. In a jaw crusher having reciprocal Crusher jaws,

3 a jaw plate comprising a back adapted to engage a support in the Crusher and a working face adapted to cooperate With the face of an opposed plate to apply crushing forces to rocks andthe like fedjto the jaw of the Crusher, said working face being characterized by a plurality of spaced elongated Crusher ribs separated by peening slots, and said ribs being joined to one another by transverse tie bars located in spaced relation to one another in rows within said slots, said tie bars being of less height than said ribs so as to be confined below the working surfaces of said ribs.

2. A jaw plate according to claim l wherein the jaw plate is a one-piece casting with the ends of the tie bars integral with and joined to the opposed sides of adjacent ribs.

3. A jaw plate according to claim 2 wherein the tie bars in adjacent slots are off-set one relative to another.

Buchanan May 8, 1906 Borden June 26, 1962

Claims

1. IN A JAW CRUSHER HAVING RECIPROCAL CRUSHER JAWS, A JAW PLATE COMPRISING A BACK ADAPTED TO ENGAGE A SUPPORT IN THE CRUSHER AND A WORKING FACE ADAPTED TO COOPERATE WITH THE FACE OF AN OPPOSED PLATE TO APPLY CRUSHING FORCES TO ROCKS AND THE LIKE FED TO THE JAW OF THE CRUSHER, SAID WORKING FACE BEING CHARACTERIZED BY A PLURALITY OF SPACED ELONGATED CRUSHER RIBS SEPARATED BY PEENING SLOTS, AND SAID RIBS BEING JOINED TO ONE ANOTHER BY TRANSVERSE TIE BARS LOCATED IN SPACED RELATION TO ONE ANOTHER IN ROWS WITHIN SAID SLOTS, SAID TIE BARS BEING OF LESS HEIGHT THAN SAID RIBS SO AS TO BE CONFINED BELOW THE WORKING SURFACES OF SAID RIBS.