US1491430A - Crusher - Google Patents

Description

April 22 19240 7 1,491,43G

- A. H. STEBBINS CRUSHER Filed Jude 9, 1922 2 Sheets-Sheet 1 lNl/ENTOR.

ATTORNEY Patented Apr. 22, 1924.

UNITED STATES.

PATENT" OFFICE.

Application filed June 9,

I '0 all whom it may concern:

Be it known that I, ALBERT H. STEBBINS, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented an Improvement in Crushers, ofv which the follow- 1ng description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts. 1

The invention to be hereinafter described relates to crushing machines.

One feature of the present invention resides in a crusher having a pair of arms mounted in spaced relation to swing about spaced axes so that the adjacent faces of the arms will move relatively to each other in the direction of their length with crushing effect.

Another feature of the invention resides in a crusher provided with jaws having corrugated or wavy faces arranged to be moved relative to each other in the direction of the length of the jaws to feed the materials downwardly progressively and to crush them.

Another feature of the invention resides in an unbalanced wheel which serves to rock the pair of arms of the crushing machine back and forth with crushing effect. By providing an unbalanced wheel to impart rocking movement to the crushing jaws, danger of breaking the crushing machine upon the introduction of an exceptionally hard piece of material between the jaws is avoided, since the unbalanced wheel is free to vary its path of movement under different pressures.

Other features of the invention and novel combination of parts in addition to the above will be hereinafter described in connection with the accompanying drawings which illustrate one good practical form thereof.

In the drawings:

Fig. 1 is a perspective view of a crusher constructed in accordance with the present invention, one side support of the crusher being broken away;

Fig. 2 is a vertical sectional view of the crusher of Fig. 1;

Fig. 3 is a diagrammatic view showing the pair of crushing jaws swung to the right; and

Fig. 4 is a. view similar to Fig. 3, showing the crushin jaws swung to the left.

In the em odiment of the invention illus- 1922. Serial No. 566,896.

trated the crusher is supported upon side rails 10 and these rails are spaced a art to receive the crushing mechanism t erebetween. The crusher is rovided with a pair of swinging arms 11 and 12 pivotally mounted upon transversely extending shafts 13 and 14 and 'the ends of these shafts are mounted in bearing blocks 15 resting upon the rails 10, and bearing plates 16 are placed over the ends of these shafts and are secured to the bearing blocks 15 and rails 10 by bolts 17. The adjacent faces of the arms 11 and 12 are provided with cooperatin jaws 18 and 19 between which the materia to be treated is crushed.

In the present case, the depending arm 12 consists of spaced downwardly extending side members 20 and 21 connected by a trans versely extending portion to which the jaw 19 is secured, and the arm 11 is similarly formed and has a transversely extending portion to which the jaw 18 is secured. The arms 11 and 12 are connected so that movement of one is im arted to the other, and in the construction s own the arms 11 and 12 are connected by links 22 secured to the respective arms by transversely extending shafts 23 and 24 and these shafts extend through the side members 20 and 21. The arrangement is such that the shafts 23 and 24 are held a fixed distance apart by the links 22 as the arms 11 and 12 are swung back and forth.

Various means may be employed for imparting the-desired rocking movement to the arms 11 and 12 and in the present case unbalanced rotating wheels serve to impart this rocking movement. In theconstruction shown, the arm 12 extends downwardly some distance beyond the arm 11 and at the lower end of the arm 12 is provided a shaft 25 which extends through the downwardly extending side members 20 and 21 and is rotatably supported thereby. The unbalanced wheels 26 and 27 are secured to the shaft 25 at each side of the side members 20 and 21, and this shaft may be rotated by a belt (not shown) engaging a pulley 28 mounted upon the shaft 25. The wheels 26 and 27 may be unbalanced by securing one or more heavy plates 29 to a portion of the wheels as shown. As a result of this construction rotation of the shaft 25 and the unbalanced wheels 26 and 27 secured thereto will tend to impart a gyratory movement to the shaft 25. This gyratory movement is resisted in a ii v w.

direction toward and from the shaft 14 by the arm 12, but not in a direction at right angles to this arm, and the gyratory movement will serve to swing the arm 12 back and forth about its pivotal mounting 14, and a similar movement will be imparted to the arm 11.'by the links 22. The driving belt that operates the pulley 28 preferably extends upwardly from the pulley in substantially a vertical direction so that its tension will not restrict the swinging'movement of the arm 12.

It will be understood that since the shafts 13 and 14 about which the arms 11 and 12 swing are held a fixed distance apart, rocking movement of the arms 11 and 12 about these fixed pivots will produce a movement of one jaw longitudinally of the other, as will be apparent from Figs. 3 and 4, and this serves to crush the materials between the jaws and also to exert a rubbing pressure thereupon. The crushing eifect of the jaws may be increased by providing the same with wavy surfaces or corrugations which extend transversely of the jaws, as will be aparent from the drawings, and the longitudinal movement of one jaw relative to the other will serve to imprison particles to be crushed between the wavy surfaces or corrugations upon the opposite jaws and crush the same as the jaws move from the position shown in Fig. 2 to the position shown in either Fig. 3 or Fig. 4. Upon examining the relative position of the corrugations, as shown in Flgs. 2, 3 and 4, it Wlll be seen that as the arms 11 and 12 are rocked back and forth the corrugated jaws will serve to feed the materials downwardly pro essively and to crush them with a rub ing pressure.

It may be desirable to vary the distance between the jaws 18 and 19 to vary the size to which the materials will be crushed and to this end, in the present case, the transversely extending shafts 23 and 24 extend through the eccentric collars 30 which are journalled in the side members 20 and 21. These collars may be provided with notches 31 to receive a tool adapted to rotate the collars within the sidemembers 20 and 21 and the collars may be clam ed in the desired position of adjustment y set screws 32. The arrangement is such that by rotating the eccentric collars 30 the arms 11 and 12 may be moved relative to the shafts 23 and 24 either towards or from each other.

It may be desirable to provide means for normally retaining the depending arms 11 and 12 in a predetermined position such, for example, as in a vertical position, and to this end in the present case coiled springs 33 are provided to act upon the outer faces of the arms 11 and 12. One end of these springs may be received in the sockets 34 provided in the bars 35 secured to the side rails 10 and mouse extendin transversely therebetween and the other en of these s rin may abut against shoulders 36 upon t e side members 20 and 21 of the depending arms. If desired the tension upon the springs may be adjusted by bolts 37 the inner ends of which en age disks 38 within the sockets 34 and ,w ich .may be forced outwardly by the bolts 37.

Materials may be prevented from escaping from the jaws 18 and 19 at the sides thereof by side plates 39 secured to one of the jaws by screws 40 and positioned to overlap the other jaw, as will be apparent from Fig. 1. The materials to be ground may be delivered to the jaws 18 and 19 by a hopper or other means not shown.

As a result of the construction described, the unbalanced wheels 26 and 27 will rock the jaws back and forth with crushing effect but will not exert sufiicient force upon the jaws to break the crusher upon the introduction of an exceptionally hard piece of material between the jaws. It will therefore be seen that in this construction danger of breaking the crushing machine is avoided.

What is claimed 1s:

1. A crusher comprising in combination, a pair of spaced arms mounted for swinging movement about spaced axes, coo er atmg jaws upon said arms, means inc uding an unbalanced wheel for imparting rocking movement to one of said arms, and a connection between the arms to impart movement of one arm to the other and arranged to impart relative sliding crushing movement to said jaws.

2. A crusher comprising in combination, a pair of spaced arms mounted for swinging movement about spaced axes, cooperating jaws upon said arms, an unbalanced wheel carried by one of said arms and rotatable for imparting rocking movement to the arm, and a connection between the arms to impart movement of one arm to the other and arranged to impart relative sliding crushing movement to said jaws.

3. A crusher comprising in combination, a pair of spaced depending arms mounted for swinging movement about spaced axes,

an unbalanced wheel supported at the lower end of one of said arms and rotatableto impart swinging movement to the arm, and a connection between the arms for imparting movement of one arm to the other and arranged to impart relative sliding crushing movement to said jaws.

4. A crusher comprising in combination,

ing means for normally maintaining the arms in a predetermined position along the path of swinging movement.

5. A crusher comprising in combination,

a pair of spaced arms mounted for swinging movement, cooperating jaws upon said arms, an operating shaft rotatably supported by one of said arms and provided with unbalanced means, means for rotating said shaft with vibratory effect to impart rocking movement to said arm, and a connection between the arms for imparting movement from one arm to the other.

6. A crusher comprising in combination, a pair of spaced arms mounted for swinging movement about spaced axes, cooperating jaws upon said arms, means connecting said arms at points distant from said axes to impart movement from one arm to the other,

means for imparting rocking movement 'to the arms, and springs for yieldingly resistlng movement of the arms from a predetermined pos1tion.

7. crusher comprising in combination, a pair of spaced arms mounted for swinging movement about spaced axes and extending downwardly from the axes, cooperating jaws upon said arms, a shaft journaled in and supported by a downwardly extending portion of one of said arms for free swinging movement with the arm, means for rotating the shaft with vibratory effect to vibrate said arm, and a connection between the arms to impart movement of one arm to the other.

In testimony whereof, I have signed my name to this specification.

ALBERT H. STEBBINS.

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