Патент USA US2130673код для вставки
Sept.‘ 210, 1938. K. MEISTER 2,130,673 CRUS HER Filed Jan. 7, 1935 2 Sheets-Sheet 1 Patented Sept. 20, 1938 2,130,673 » uNiTEo STATES PATENT OFFICE 2,130,673 ‘ CRUSHER Karl Meister, Magdeburg-Sudenburg, Germany, assignor to the firm Fried. Krupp Grusonwerk ' Aktiengcsellschaft, Magdeburg-Buckau, Ger many Application January 7, 1935, Serial No. 795 In Germany January 16, 1934 1 claim. (o1. 83—53) My invention relates to crushers having a moveable or rocking jaw and a non-moveable or stationary jaw between which the material under treatment is crushed, whereupon the material Ul leaves the crusher through a discharge gap at the lower end of the said jaws. It is well known to those familiar with crush ing machinery that the volume of the material under treatment increases in proportion as it is 1 O disintegrated and the further it is conveyed to the discharge gap. Thus the work of disintegra-. tion increases in the lower part of the crushing zone.w As, moreover, small particles distributed in the material being fed immediately fall down 15 into this lower zone, not only the most important part of the'disintegration work must be executed in this zone, but also an undesiredsswell of ma terial occurs there. Up till now, these disadvan tages could be avoided only by reducing the 2 charge of the crusher, but in this way the capacity of the latter is diminished. As the swell of ma-, terial in the lower part of the crushing zone cannot wholly be avoided in this manner the in ferior sections of the crushing jaws wear consid 2 m erably and a great deal of dust is produced. In order to avoid these disadvantages, I provide a jaw crusher of improved design, the crushing plates of which have an inclined position and broaden towards their lower ends, 1. e., towards 3° the discharge gap of the crusher, , so that the cross section of the crushing zone increases in the direction of the plates, while it decreases in the direction normal to them. Preferably, the inclination of the crushing 535 surfaces varies in the single sections, the upper parts of these surfaces forming an acute angle, the lower ones being nearly parallel to each other. Another feature of the invention consists of grooves arranged in the crushing‘ surfaces, these as Q grooves proceeding from the upper edge of each crushing plate and diverging downwards, taper ing away into the surface of the plate at. some Fig. 3 is an elevation of the lower crushing plate, on the same scale as Fig. 2. Referring to the drawings, I is the machine frame having the yoke 2 in a sloping position. This yoke forms the upper, non-‘moveable jaw. 5 3 is the lower jaw arranged in juxtaposition to , the upper one; this jaw is inclined, too, its in clination being, however, less than that of the jaw 2. The upper section of the jaw 3 is hinged at 4 to the- frame I; the lower part is rocked by 10 the power driven eccentric 5. The jaws 2 and 3 are ?tted respectively with crushing plates 6 and 1 of trapezoid shape which are illustrated in Figs. 2 and 3. These plates 6 and 1 form thus a space the length of which in- 15 creases towards the lower gap, while its breadth decreases, so that the cross section of the crush ing zone increases downwards in the proportion as the volume of the material grows larger when being distintegrated. 2° The crushing plate 1 is arranged on the move able jaw 3. The crushing surface of the plate 6 secured to the stationary yoke 2 is stepped and provided with grooves of triangular shape pro ceeding from the upper edge of the plate 6 and 25 tapering away into its surface at a distance from the lower edge. By these grooves, ribs 8 are formed that have steps 9 and diverge downwards. The steps 9 di minish the height of the ribs 8 at intervals. - 30 In the middle sectionof the plate, the bottom of each groove broadens. On this broadening bottom a tooth I0 is arranged being placed be tween the ribs 8. The teeth lll taper away into the surface in the same manner as the ribs 8. 35 The lower zone of the surface of the crushing plate 6 is smooth. The plate ‘I is provided with similar ribs H and additional teeth l2, these ribs H having, however, no steps. The exterior rib II’ on each 40 . lateral side of plate 1 has only hallI the cross section of the other ribs ll; thus, it has the ' distance from the lower edge of it, so that the . shape of a right triangle. These exterior ribs ll’ 45 crushing surfaces are smooth near the discharge gap. The ribs and teeth formed by these grooves serve to disintegrate the material when it moves throughthe crushing zone, and, at the same time, to spread it equally all over the crushing surfaces. , 50 A structure embodying the features of my in vention is illustrated in the accompanying draw ings forming 'a part of this speci?cation, in which Fig. 1 is a vertical section of a jaw crusher; Fig. 2 is an elevation of . the upper crushing 55 plate, on a-larger scale; form lateral rims that prevent the material un der treatment from'laterally falling down from 45 the plate 1, whereby the space between the move able jaw 3 and the machine frame i would be stopped. The lower part of the plate ‘I has a smooth surface. The apparatus speci?ed before operates as follows: 50 The material fed from above between the crushing plates 6 and 1 consists of pieces of dif ferent size. Large pieces are crushed in the up permost zone by the ribs 8\and II when the jawv . 3 is rocked. Smaller pieces slide down into the 55 2 2,180,673 zone of the additional teeth I!) and I2 and are disintegrated there together with the crushed parts coming from the upper zone. Fine par ticles fall immediately down and leave the crush ing means by passing through the lowest zone which is enclosed by the smooth- parts of the plates 6 and ‘l, as no stopping of the material can be eifected between these smooth-surfaces. Other embodiments and numerous minor 10 changes may be made by those skilled in the art without‘in the least departing from the. scope of my invention. I claim: being secured to the underside of said yoke, the other plate being arranged on said movable jaw, the surfaces of said plates being in the form of alternating grooves and teeth extending down ward from the upper zone of the plate to the low er zone adjacent the bottom edge of said plate providing a smooth lower surface on the plate, the bottom of each groove broadening downward and all the teeth diverging downwardly with re spect to each other and tapering away into the 1 surface of the lower zone of the plate, and addi tional teeth located respectively in each of the v v In a crusher of the type described, a machine frame having a transverse yoke with a sloping underside, a movable jaw arranged in said frame below said yoke and in opposition thereto, means for rocking said jaw, and crushing plates broad ening toward their lower ends, one of said plates broadening bottoms of said grooves, the upper ends of said additional teeth terminating in the medial zone of the plate and their lower ends tapering away into the surface of the lower part of the plate. ‘ KARL MEISTER.