US1604744A - Crushing roll - Google Patents

Description

Oct. 2 1926. 1,604,744

v r C- W. FINGVER CRUSHING ROLL Filed Jan. 12. 1926 Patented Get. 26, 1926 I entree Pi h Y awn CARL V7. FINGER, 015 WILKESJBARRE, PENNSaYLVANIA.

CRUSHING ROLL.

Application fi1ed January 12; 1928. Serial No. 80,755.

plates or segments thereto which constitute the crushing elements.

Here'tofore in rolls provided with detachable segments or crushing elements, the latter have usually been secured by ordinary bolts passingdirectly therethrough'. Such bolts come in direct contact with the material crushed, and if the material is of an abrasive nature, the bolts are soon worn out, and the segments become loose. The segments are usually made of manganese steel, which cannot be machined or drilled. The holes are cored, which cannot be done accurately, and the replacing of segments is made very difficult, due to differences in the bolt holes.

The object of the present invention is to provide an improved construction for a roll of this type, and especially to provide improved means for securing the segmental crushing elements so that the bolt holes therein may be dispensed with, and said elements held in fixed relation to the body of the roll by securing the same at the ends of the roll.

In the specific embodiment of the invention herein described, the faces of the segments are beveled at the ends, and endrings, having beveled inside faces engaging the same, are held together by means of tie rods or bolts extending longitudinally through the body of the roll. Since the manganese segments cannot be machined, and smooth surfaces must be secured by grinding, any inequality or roughness is taken care of by layers of rubber or similar material between the segments and the body portion of the roll. To prevent the segments from moving on the roll body, a projection is cast on the inner face of each segment, near the center thereof, to fit a corresponding cored hole in the roll body.

The specific construction of the invention and the advantages. thereof will be more clearly explained in connection with the accompanying drawing, which illustrates the same in its preferred form.

In the drawing:

Figure l is a central longitudinal section through the roll.

Figure 2 is a transverse section thereof.

The roll, constituting the subject matter of the invention, comprises a' drum-shaped body portion 5, having ends 6 which are keyed to a shaft 7. The outer face of the body 5 has a circumferential raised portion 8 midway between its ends, which forms a seat against which rest the corresponding raised inner surfaces 9 of the segments 10, constituting the crushing element. These seg ments are arranged in juxtaposed relation surrounding the drum 5, and are formed with outwardly projecting teeth '11.

Each segment 10 is formed centrally with an inwardly projecting lug 19, which fits into a corresponding cored hole 13 in the drum. This positively prevents circumferential movement of the segments with respect to the drum, while they are held against radial movement by a pair of end elements 1 1, which are held together by longitudinal tie rods 15 passing through the body portion of the roll. Each end member 14L is formed with rim 16, having an inside beveled surface which fits over the correspondingly beveled end portion 17 of the seg ments 10. The end members 14:, therefore when drawn. inwardly, serve to clamp the juxtaposed segments 10 accurately in fixed relation to the drum.

The segments are, as above stated, made of manganese steel or similar alloy, and in order to avoid the time and expense of grinding the same to provide smooth surfaces, a thin strip 18 of elasticmaterial may be secured between the rim 16 and the adjacent beveled ends 1'? of the segments, and bands 19 of similar material may be secured between the inner surfaces of the segments and the adjacent surface of the drum. The use of these cushioning strips, however, is optional.

From the foregoing description, it will be seen that as a result of this invention, the construction of the segments is greatly simplified, and they may be made with correspondingly less expense; The danger of the segments becoming loose is practically eliminated. At the same time, when the segments are worn out, they may be easily and quickly replaced.

While I have shown and described in detail the specific construction of the invention in its preferred form, it is to be'understood that this ismerely for the purpose of illustration, and that various modifications may be made in the form and arrangement of the various features without any material departure from the salient features of the invention as set forth in the claims.

What is claimed is:

l. A crushing roll comprising a body portion, a series of detachable segmental elements surrounding the body portion and formed with inwardly projecting lugs, said body portion having holes receiving said lugs to prevent circumferential movementof said elements with respect to the body portion, apair of end members at opposite ends of the roll, and tie rods passing longitudinally through the body portion and holdingsaid end members in clamping relation to said segmental elements.

2. A crushing roll comprising a drum, a series of segmental elements surrounding the drum and having integral inwardly projecting lugs, said drum having radial holes receiving said lugs to prevent circumferential movement of said elements with respect to the drum, said segmental elements having heir ends beveled, a pair of end pieces having rims formed with inner faces correspondingly beveled to fit over the respective ends of the segmental elements, and tie rods passing longitudinally through the drum and holding said end members in clamping relation to said segmental elements.

3. A crushing roll comprising a body portion, a series of detachable segmental elements surounding the body portion, said body portion and the respective segmental elements having co-engaging raised surfaces substantially midway of the length thereof, one surface having lug projecting therefrom and the other having a corresponding portion cut away to receive the lug, whereby to positively prevent circumferential movement of said segmental elements with respect to said body portion, elastic cushioning strips between the body portion and the respective segmental elements near the ends thereof, a pair of end members at opposite endsof' the roll, and tie rods passing longitudinally through the body portion and holding said end members in clamping relation to the segmental elements.

i. A crushing roll comprising a cylindrical body portion, a series of juxtaposed detachable segmental elements surrounding the body portion, a pair of end members at opposite ends of the roll and spaced from the body portion, and tie rods passing longitudi nally through the body portion and holding said end members in clamping relation to said segmental elements, said body portion and said segmental elements having interengaging portions substantially midway of the length of the roll which prevent relative circumferential movement of said elements with respect to the body portion.

A crushing roll comprising a drum, a series of segmental elements surrounding the drum and having their ends beveled, a pair of end pieces spaced from the ends of the drum and having rims formed With inner faces correspondingly beveled to fit over the respective ends of the segmental elements, tie rods passing longitudinally through the drum and holding said end members in clamping relation to the segmental elements, and intcrengaging means formed on the drum and segmental elements respectively midway their length and positively preventing movement of one relative to the other.

5. A crushing roll comprising a drum formed with a circumferential raised surface substantially midway between its ends, a series of segmental elements surrounding the drum and formed with inner raised surfaces between their ends seating against the raised surface on the drum, a pair of end members at opposite ends of the roll, and tie rods passing longitudinally through the drum and holding said end members in clamping relation to the segmental elements, the raised surfaces on the drum and segmental elements having interlocking means to prevent relative circumferential movement of said elements with respect to the drum.

In testimony that I claim the foregoing as my own I have hereto atliXed my signature.

CARL W. FINGER.

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