US2568203A - Housing for impact breaking or crushing machines - Google Patents

Description

p 13, 1951 G. H. PATTINSON 2,568,203

HOUSING FOR IMPACT BREAKING OR CRUSHING MACHINES Filed June 10, 1949 In venior Attorney Patented Sept. 18, 1951 HOUSING FOR. IMPACT snneigmoon onusnme MAGHINES George H..Pat tinson, Staines,1England --Application June 0, 1949, Serial No. 98,352

In Great Britain March 24, 1947 The present invention relates to machines for breaking up or crushing stone, gravel, clinker, slag and like material by impact, and concerns those of the rotary-type wherein a rotor having a series of radial hammers pivoted thereon revolves within a housing having a roughened or ribbed interior anvil-like surface against which the material to be broken or granulated by impact is thrown by the heads of the revolving hammers.

It is the object of the present invention to provide an improved housing for a machine of the kind referred to, in which provision is made of means for reducing to a minimum wear and tear of the anvil-like surface. That is to say the material itself which is crushed or broken by the heads of the hammers is utilised to protect the anvil-like surface in the interior of the housing.

In order that the present invention may be clearly understood and readily carried into efiect, an impact breaker made in accordance therewith will now be described, by way of example, with reference to the accompanying drawings, in which Figure 1 shows a longitudinal sectional elevation of the machine, and

Figure 2 is a section on the line 2, 2 of Figure 1.

Referring to the drawing, l denotes in general the housing of a machine for breaking up or crushing stones, gravel, clinker or the like, in which housing is rotatably mounted a rotor carrying one or more pivoted hammers, one form of which is shown and described in British patent specification No. 489,678. The precise construction of the hammer rotor is not material to the present invention and accordingly the construction of the hammer rotor, which is indicated diagrammatically generally by reference numeral 2, will not be described herein. The material is fed into the hopper 3 where the hammer heads in their revolutions with the rotor 2 impact the material against that portion of the internal surface of the housing I which embraces the descending portion of the rotor which lies approximately on one side of a vertical line passing through the centre of rotation of the rotor 2 and above a horizontal line passing through the same centre, the rotor 2 being considered as rotating in an anti-clockwise direction.

The anvil or striking surface of the housin or casing consists of a number of attritionresistant blocks 4 made of manganese or other suitable steel. Ihese blocks 4 are mounted side by side in the manner shown to form a station- 1 Claim. (Cl. 241F285)- aryarchaving its centre of curvature located at theaxis of rotation of said rotor 2. Each block is reducedatt at-each end (FigureZ) and provided with holes .6 through which bolts or rivets may pass for securing th blocks 4 to the housing I as shown in Figure 2.

The blocks 4 are specially shaped at their sides (as shown in Figure 1) so that when they are placed side to side they form an arcuately shaped member.

Blocks ta, ib, ie and 4d (hereinafter termed anvil-blocks) are practically identical in size and shape and are provided with longitudinal recesses B of substantially semi-circular shape in cross section, the opening of each recess being substantially equal to the width of the housing 1.

Between each of the afore-mentioned blocks as shown in Figure 1, blocks 4e, 4;, 4g and 4h, practically identical to each other, are mounted. These blocks are also provided with centrally located set-back longitudinal recesses 9, which are disposed level with the outer lips of the adjacent circumierentially spaced anvil-blocks.

A special shaped block ii is provided at the top of the housing or casing to join the standard type of lining block Ill of the casing I, said block 42' being provided with a special shaped recess l I. It may be necessary to provide further blocks similar to blocks 4e, 4 4g and 4h in order to complete the arcuate striking surface of the casing.

From Figure 1 it will be seen that when the blocks are assembled together the recesses 8 present substantially horizontal transversely disposed shelf portions and that the recesses 8 match with the recesses 9 to form circumferentially spaced surface on the housing wall. The sides I2 of the blocks ia, 41), 3c and 4d are inclined so that when the material is thrown from the hammers against the striking surface these inclined sides I2 direct the material into the cavities, in which a quantity of the material is retained, so that as the process continues and further material is thrown against the striking surfaces of the blocks, the surfaces are protected by the material initially retained in these cavities. Undue wear on these striking surfaces of the blocks is thus prevented as th material itself takes the impact.

The invention is not limited to the precise forms or details of construction described, as these may be varied to suit particular cases. For example, the recesses 8 need not be. of part circular cross section as shown, but may be of any convenient shape.

What I claim is:

A housing for an impact breaking or crushing machine of the kind comprising a housing within which is rotatabiy mounted a rotor having a number of pivoted hammers thereon, said housing having a portion of the interior wall thereof of arcuate formation with the centre of curvature located at the axis of rotation of the rotor to be used therein, and said arcuate wall portion being composed of a series of circumferentially spaced attrition-resistant anvil blocks which are separated circumferentially by at least one plain surface attrition-resistant spacer block beyond the inner face of which spacer block the adjacent anvil blocks inwardly radially project, each anvil block having that side of the projecting portion thereof which faces in the direction of approach of the hammers of the rotor to be used in said housing formed with a recess presenting a horizontal transversely disposed shelf for retaining a layer of crushed or broken material, the opening of said recess being substantially equal to the width of the housing, and the inner face of each of said spacer blocks being formed with a centrally located set-back surface disposed as a smooth continuation of the radially outermost portion of said opening of the recess in the anvil block which faces toward said spacer block.

GEORGE H. PATTINSON.

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

UNITED STATES PATENTS Number Name Date 100,302 Lyons Mar. 1, 1870 1,144,102 Brainard June 22, 1915 1,166,698 Lincoln Jan. 4, 1916 1,753,437 Lykken Apr. 8, 1930 2,012,694 Runyan Aug. 27, 1935 2,294,921 Lykken Sept. 8, 1942 FOREIGN PATENTS Number Country Date 388,337 Great Britain Feb. 23, 1933 318,697 Italy June 18, 1934

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