US1297385A - Rock crusher and pulverizer. - Google Patents

Description

c. 0 MICHAELSENQ BOOK CRUSHER AND PULVERIZER.

APPLICATION FILED JUNE 25. NH].

Patented Mar. 18, 1919.

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M m LLWL CHAS. O. MICHAELSEIN, El-mentor.

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C. O. MiCHAELSEN,

ROCK HUSHER AND PULVERIZER.

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0. 0. MICHAELSEN ROCK'CRUSHER AND FULVERiZER.

APPLICATION FILED IUNE 25.1917

1,297,385. Patented Mar. 18,1919.

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UNITED STATES PATENT oFFion.

CHARLES 0. MICHAELSEN, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR, B Y MESNE ASSIGNMENTS, '10 MTOHAELSEN MACHINERY COMPANY, A CORPORATION OF NEVADA.

ROCK CRUSHER AND PULVERIZER.

Patented Mar. 18, 1919.

Application filed June 25, 1917. Serial No. 176,840.

To all whom it may concern:

Be it known that I, CHARLES 0. MICHAEL- sEN, a citizen of the United States, and a resident of Minneapolis, in the county of oscillating jaws adapted to crush and 'abrade material inclosed between them. It is the object of my invention to provide a compact, powerful and durable machine of this kind, having a large capacity in proportion to its size, adapted to receive moderate sized pieces of rock or ore, to reduce the same to a fine pulverulent product, and having actuating mechanism so constructed and arranged that the required actuating force is substantially constant notwithstanding the intermittent or reciprocatory action of the crushing and pulverizing mechanism. A further object of my invention is to .provide a driving or actuating mechanism in which the contacting moving parts receiving the greatest pressures have surfaces which roll upon each other and thereby avoid the friction of rubbing or sliding and the excessive wear which would result therefrom. A further object of my invention is to provide simple and effective means for taking up or compensating wear of the rolling contact-surfaces without altering the operative relation of the parts.

In the accompanying drawings Figure 1 is a side view of a machine embodying my invention, Fig. 2 is a longitudinal vertical section of the same, Fig. 3 is a transverse vertical section thereof taken through the axis of the driving shaft, Fig. 4 is a detail horizontal section through one of the con.- necting links for the lower ends of the oscillating jaws, and Fig. 5 is a diagrammatic side view showing details of a part of the rocking-lever and the co-acting part of one of the oscillating jaws.

In the construction of the machine illustrated in the drawings, I employ two main side-frames 6 which are connected to each other and held in parallel and spaced relation by ribbed end-pieces 7 secured thereto by bolts 8. In the upper part of the sideframes 6 at the center thereof are formed bearings for the transversely extending drive-shaft 9 which carries at its ends, outside the frame, a fly-wheel 10 and drivepulley 11, the latter being connected by belt with a suitable source of power so as to .be driven at a uniform rate when the machine is in operation. Secured on the shaft 9 inside the bearings thereof are two pinions 12 which mesh with large gears 13 mounted on a shaft 14 disposed beneath and parallel with the shaft 9 and having its end-portions suitably journaled in the side-frames. On the central portion of said shaft 14 intermediate the gears 13 there is an eccentric 15 which fits revolubly within the cylindrical transverse bore of a box 16 of approximately cubical external form. Said box 16 fits sli d ably between the forked 'lower endportions 17 of a rocking-lever 18, the upper end of which fits pivotally upon the central portion of the main drive-shaft 9 between the pinions 12. The ends of the forked portions 17 of the rocking-lever are connected by bolts 19, passing through the same as shown. In opposite sides of the upper or hub-portion of the rocking-lever there are grooves or channels for receiving projecting parts of the oscillating jaws and actuating the same as will be hereinafter described.

The oscillating jaws are provided in pairs at each end of the machine and, being alike at each end, may be described with reference only to one pair thereof. The outer jaw 20 is carried by a transverse shaft 21 of which the end-portions have a pivotal bearing in boxes 22 arranged in horizontally extending guideways in the side-frames 6. The boxes 22 are retained in adjusted positions in the guideways by means of spacing-plates 23 disposed between the outer ends thereof and the frame-end-pieces 7, and threaded spacing-rods 24 provided with nuts 25 and arranged between the inner ends of the boxes and the adjacent ends of the guideways as shown. The inner jaw 26 is carried by a transverse shaft 27 of which the end-portionshave a pivotal bearing in eccentric bushings 28 disposed rotatably in openings therefor through the side-frames 6, the

bushings being held in adjusted relations to which the inner sides are formed by sald plates 32 and the outer sides are formed by plates 33 removably attached to the outer i sides of the frame. At the left of Fig. 1 the by means of an open rectangular link 34 fitting around boxes 35 and 36 disposed V spacing-block'37, a plurality of plates 38 and 36 may be made by transferring some of plate 33 is omitted to show the shaft-ends and connecting-link Within the chamber. At each side of the machine the shafts 30 and 31 are pivotally connected to each other about the shafts, said boxes being held in spaced relation to each other by means of a and wedge-plates 39, arranged between the boxes as shown in Fig. 4. The wedge-plates have end-flanges which overhang the ends of the boxes, being connected therewith by screws 40 so that they may be drawn inwardly by said screws. Tensile stresses be tween the shafts are received by the links 34, and compressive stresses are received by the spacing- parts 37, 38 and 39. Adjustments of the axial spacing of the boxes 35 the plates 38 from positions between the boxes and block 37 to positions between the boxes and the ends of the links 34.

The adjacent sides of the jaws 20 and 26 are provided with renewable facing-plates or blocks 41, 42, 43 and 44 secured thereon as shown clearly in Fig. 2, the adjacent faces of the lower blocks 41 preferably being almost in contact but diverging slightly at their upper edges, and the blocks 43 being thinner than the adjoining blocks 42 and 44, to form an enlarged spaceor pocket, wider than the throat between the upper blocks 44. The upper ends of the aws have arcuate faces 45 and 46, concentric respectively with the shafts 21 and 27, and above said arcuate ends there are arranged the converging sides of a feed-hopper 47 by which materials are directed into the space between the pair of aws.

From the upper end of the inner jaw 26 at the back thereof an integral arcuate portion 48 extends concentrically with the pivot-shaft 27 and joins the upper part of an arm 49 which extends radially of said shaft toward the shaft 9. At the end of said arm 49 a lug or tooth 50 projects beyond the upper 'face of the arcuate connecting portion 48,, said lug or tooth extending into the before-mentioned axial groove in the adjacent side of the hub portion of the rocking-lever 18. The upper and lower sides 01' faces aa of the lug or tooth 50 are shaped to conform with involute curves generated upon a base-circle A, indicated in Fig. 5, and the corresponding faces b-b of the groove or channel in the hub of the rockinglever are likewise shaped to conform with involute curves generated upon a base-circle B, also indicated in said Fig. 5. The respective involute faces ab and ab contact with each other, and during pivotal movement of the rocking-lever 18 and jaw 26 about the respective axes of the shafts 9'and" 27 said pairs of involute faces roll upon each other without rubbin or sliding, within the limits of their arcs of contact. Thus movements of the rocking-lever are transmitted to the jaw 26 as though said parts were provided with cylindrical surfaces corresponding to the pitch-circles C and Din ig. 5, and said surfaces rolled upon each other without slipping. Now a peculiar property of involute surfaces, when contacting as described, is that the distance between the cen ters of rotation may be varied withouteither interfering with the rolling of the surfaces upon each other, or changing the relative rates of movement of the actuating and actuated parts. In consequence of this peculiarity, it is practicable to move the center of the shaft 27 toward or away from the center of the shaft 9, to thereby adjust the involute working faces to a proper relation to each other, either initially or to compensate wear after use; and the eccentric bearing-bushings 28 are provided for this purpose.

Owing to the link connections between the A ends of the shafts 30- and 31, the oscillating movements of the lower ends of the jaws 20 and 26 are equal in amount and alike in direction, and the space between the lower facing-blocks 41 remains substantially uniform throughout the movement, the working faces merely moving oppositely to each other in approximately parallel planes so as to rub and abrade the material between them without compressing or crushing said material. The entire working faces of the jaws have a like rubbing movement relatively to each other, but in addition thereto the upper por tions of the jaws move toward and away from each other so as to exert a crushing pressure upon the material between them during the periods of closure. The closure of the upper parts of the j aws. results principally from the disposition of the shaft 21 at'a higher level than the shaft 27, so that be understood that the corresponding parts at. the other ends of the machine, designated by like reference numerals with prime indices added thereto, are substantially a duplication of the described parts. It will be noted,uhowever, that the closing move ment of each set of the jaws occurs as the rocking-lever 18 is moved by the eccentric 15 toward the respective end of the machine, and that the closure of the jaws at opposite ends of the machine thus occurs alternately. It will be obvious that during the closing movement of either pair of jaws, when the working space between the jaws is filled with rock or the like, a greater actuating force will be required for the respective jaws than that for causing the movement thereof in the opposite direction, during which their movement is retarded only by the rubbing of the material between them and mainly in the lower part of the working-space. Owing to the alternate closing of the pairs of jaws, however, the required actuating force is substantially uniform, being the same during each half-revolution of the eccentric-shaft 14. The resistance offered by one set of jaws during the closing movement of the other set tends to balance the pressure upon the pivot-bearing of the rocking-lever, and said bearing-pressure is thus constantly less than it would be if either set of the jaws were being actuated alone.

It will be apparent that my invention provides a powerful leverage-system for actuating the crushing and pul'verizing mechanism; that owing to the incorporation of the two sets of oscillating jaws with the intermediately arranged actuating mechanism the machine will have a large working capacity proportional to its size and that a substantially constant actuating force will be required notwithstanding the intermittent action of either single unit of the crushing and pulverizing devices. It will be noted further that by the use of the described in volute contacting surfaces of the actuating parts receiving the greatest pressures, whereby said surfaces roll upon each other instead of sliding or rubbing, there is a marked saving of friction losses in the transmission of the power; and also that adjustment of the 7 parts to a proper working relation is greatly facilitated, requiring merely the turning of the eccentric bushings 28.

Now, having described my invention, what I claim and desire to secure by Letters Patent is:

1. In a machine of the class described, a pivotally mounted oscillating member having a part extending radially of the pivotal axis and provided with involute faces, a pivoted rocking-lever having involute faces engageable with the faces of said part of the oscillating member to roll thereon during simultaneous pivotal movement of the lever and said member, means for actuating the rocking-lever, and adjusting means for varying the spacing between centers of the oscillating member and rocking-lever.

:2. In a machine of the class described, pivoted oscillating members, a pivoted rocking-lever disposed intermediate said mem bers, means for oscillating said rockinglever about its pivotal axis, and curvilinear surfaces on said rocking-lever and on parts of said members, said surfaces adapted to engage and roll upon each other during simultaneous pivotal movement of the rocking-lever and members about their respective axes.

3. In a machine of the class described, oscillatable members pivotally mounted on parallel spaced axes, a driving-shaft and an eccentric shaft disposed intermediate said members parallel with the axes thereof, gearing connecting said driving-shaft and eccentric-shaft, a rocking-lever pivoted on the driving-shaft and having a forked portion straddling the eccentric-shaft, an eccentric on said shaft for actuating the rockinglever, and means connecting the rockinglever and said oscillatable members whereby the latter are similarly moved during alternate half-revolutions of the eccentric-shaft.

4. In a machine of the class described, members pivoted on spaced parallel axes, a rocking-lever pivoted on an axisintermediate and parallel to the axes of said members, means for oscillating said rockinglever about its pivotal axis, interengaging involute-faced parts on said rocking-lever and said members adapted to communicate movement of the former to the latter, and adjusting means for moving the axes of the oscillating members toward and away from the rocking-lever axes.

5. In a machine of the class described,

members pivotally mounted on spaced parallel axes, a driving-shaft and an eccentricshaft disposed intermediate and axially parallel with said members, gearing connecting said driving-shaft and eccentric-shaft, a rocking-lever pivoted on the driving-shaft and having a forked portion straddling the eccentric-shaft, an eccentric on said shaft, a box on said eccentric and slidable within the forked portion of the rocking-lever, and interengaging involute-faced parts on the pivoted members and on said rocking-lever adjacent to the pivotal axis thereof, said parts adapted to roll upon each other to communicate movement of the rocking-lever to the pivoted members.

6. The combination in a machine of the class described having pivoted members movable about parallel axes and each coacting with another member to crush materials between them during movement in one direction, of actuating means disposed intermediate said pivoted members for oscillating eccentric-shaft, and means on the pivoted the same about their pivotal axes and. immembers engaging parts of' said rockingparting crushing movement thereto alterlever, said means and said parts of the rock- 10 nately, said actuating means comprising a 1ng-lever having curvilinear engaging sur- 5 drive-shaft, an eccentric-shaft, gearing confaces adapted to roll upon each other durneoting said shafts, a rocking-lever pivoted ing pivotal movements of the members;

on the driving-shaft and actuated by the CHARLES O. MICHAELSEN:

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Yatents, Washington, D. 0. V l 1

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