US1464046A - Machine for truing crusher rolls - Google Patents

Description

Aug. 7, w23. 1,464.04@

J.WCHARDSON MACHINE FOR TRUING CRUSHER ROLLS Filed Feb. 8. 1922 2 Sheets-Shea?l l eiwit/wma MACHINE FOR vTRUING CRUSHER ROLLS Filed Feb. 8. 1922 2 Sheets-Sheetl 2 oem/tor Patented Ang., L 19Z3 U l T E S JOSEPH RICHARDSON, OF`BRISTOL, VERMONT, ASSGNOR TO FREDERICK LADUE,`OF BRISTOL, VER-MONT.

MACHINE FOR TRUING CRSHER ROLLS.

Application led February 8, 1922. Serial No. 534,884.

To all 'whom t may concern.

Be it known that l, Josnrn RICHARDSON, a citizen of the United States, residing at Bristol, in the county, of Addison and State of Vermont, have invented certain new and useful Improvements in Machines for Truing Crusher Rolls; and I dordeclare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improved machine which is especially, although not necessarily, designed for truing and grinding the surfaces of'rollers such as are used in stone crushing machines, the same being designed to permit such worlr to be accomplished without necessitating the removal of the rollers from the crushing machine.

Here, it maybe stated that these crusher rolls, between, which the rock to be ground is passed, become pitted' and their surfaces thus rendered :very uneven after a short time in use and it therefore becomes necessary to grind'their surfaces to put them in condition for further effective use. It is customary at this time to remove the rollers from the crushing machine, and as these rollers are extremely heavy in weight, weighing as much as several tons, considerable labor, time andexpenseis involved in accomplishing the task. Furthermore, the machines are put out of use and-` additional time `is lost during' the time the rollers are taken from the mill to the repairl shop to be groundA by use of a lathe. In view of these circumstances, the `above procedure is eX- tremely expensive to the owner.

In view of the foregoingcircumstances, I have' devised an extremely simple and effectivemachinefor attachment to the trough ofthe stone crusher'which will effectively and accurately grind and'true the surfaces of ythe crusher rolls withoutnecessitating the removal ofV the latter. Hence, much time, labor. and expense is saved.

The invention further aims to provide a machineof this class which is an improvement'over prior patentedand marketed machinesifor'accomplishing a similar end, the sameembodyin a horizontally shiftable and verticallytiltab e `carrier arm for the grinding elementwhichA is so mounted thatit can bequickly and easily positioned for use and readily" .moved back, and forth in a horizontal manner to effectively remove all irregularities from the surface of the rollers.

Other objects, advantages, features and constructional differences of this invention will be apparent as the descriptiongoes on.

ln the accompanying drawings forming a part of this specification in which like numerals are employed to designate like parts throughout the same:

Figure l is a perspective view of'a machine constructed in accordance with this invention showing the same mounted on the trough of the stone crusher.

`Figure 2 is a sectional view taken through the lower portion of the machineshowing the grinding element engaged Awith one of the Crusher rolls.

F i ure 3 is a central longitudinal sectiona view taken substantially on the plane of the line 3-3 of Fig. 2.

Briefly described, the invention comprises a structure adjustably mounted on-a pair of guides secured to a base which, in this instance, is the trough of a stone crushing machine. This structure embodies a horizontally movable and vertically tiltablearm, which has at its outer end, suitable grinding means for engagement with the `surface of the Crusher rolls, said means being driven in any suitable way. ln addition to these parts, there is a feed screw, which serves, through themedium of a horizontally movable block, to move the arm back and forth in a horizontal manner. Thisbloclr is cooperative with a belt shifting device which embodies means for automatically reversing the direction of movement of the arm after the latter has moved a pre-determined distance, thus automatically controlling the movementofthe arm. Other parts and details are shown but need not be mentioned at this time.

Referring to the drawings by numerals, l designates a pair of upstanding duplicate frames of suitable formation whichare arranged in spaced relationship-on one end of the trough 2 of a stone crushing machine. The frames 1 may be connectedwith the crushing machine in any suitable way. However, they are preferably connected by means which is such that it permits them to be moved closer to or further from the rolls 3. The preferredconstruction for accomplishing this comprises a plurality of substantially tfshaped brackets 4L which are detachably connected with the trough 2 in any suitable way. These brackets are arranged opposite one another and the adjacent ones are disposed in spaced relation. The upstanding portions thereof are formed with elongated slots 5 in which binding elements 6 have vertical movement. The means under consideration further comprises a pair of substantially rectangular bars 7 which have Oppositely disposed guide grooves 8 formed in their inner surfaces in which the laterally directed lower ends 9 of the frames are slidably received. Set screws or any other suitable means 10 may be employed for holding the frames invarious set positions. At their upper ends, the frames are provided with horizontal bearings 11, in which a shaft 12 is rotatably mounted, the latter carrying elongated pulleys 13 and 14, which serve purposes to be hereinafter set forth. Referring n-ow to the lower portion of the frames, it will be seen that each of the legs of the latter carriesk rods 15 and 16, the last named of which is positioned at a lower elevation than the first named one. A carrier arm 17 is provided intermediate its ends with a bearing 18 slidably mounted on the rod 16. Here, I may state, that this bearing may be formed in any suitable way, preferably including a removable plate 19 which serves to permit the arm to be removed from the rodrl6 and replaced whenever desired. It is to be noted that this bearing is such that it permits the arm to be tilted in -a vertical manner. A slide 2O of any suitable construction, is mounted for horizontal movement on the rod 15, the same being equipped with upstanding spaced lugs 21 between which the rear end of the arm 17 is received.

f It is desirable to provide means for tilting the arm and insuring effective engagement of the grinding element with the Crusher rolls 3. While some other construction may be used for accomplishing this end, I prefer to employ a thumb-screw 22, the latter being movable through a screwthreaded opening in the slide 20 and having swivel connection with the under face of the arm 17 as indicated at 23. In addil tion to this screw, I also contemplate using -a set screw 24 which is carried by the arm and has its lower end resting on the slide 20 as better shown in Figure 3. It is obvious that by properly manipulating these screws, the angularity 0f the arm can be easily and readily varied.

Referring now to the outer end of the tilting arm 17, it will be seen that it is equipped with spaced bearings25 in which the shaft 26 of a carborundum grinding disk 27 is journalled. Arranged between the bearings and on the shaft 26 is a small pul ley 28 driven by a belt 29 which is in turn driven by the pulley 13, the latter receiving movement from the belt 30. Here, it may be mentioned that it is of course understood that the belt 29 has suflicient slack to permit proper tilting of the arm.

It has been before intimated that the machine embodies means for imparting a horizontal continuous movement to the arm and `grinding element. In carrying this` out, I dispose a feed screw 31 between the frames 1 in the manner shown, the right-hand end of this screw extending beyond the adjacent fra-me and carrying a plurality of pulleys 32, the outer ones of which rotate with the screw and the intermediate one of which is loosely mounted on the latter to act somewhat like an idler. Two belts 33 and 34 are associated with these pulleys and with the elongated pulley 14, the belt 33 being straight as shownV while the remaining one is twisted or crossed to rotate the screw in a direction opposite to that in which it is rotatedfby the belt 33. A. shifting rod 35 for these belts is positioned above the screw 31 and. is carried by theI frames 1. This rod 35 is freely movable through the bearing openings in the frames and carries depending adjustable stops 36. t will be seen that these stops are designed to be engaged by the extension 37 of the horizontal travelling head or block l 38 mounted on the feed screw 31. When the stops are so engaged, they impart a sliding movement to the belt and shifting rod 35 and the latter through its connections 40,

with the belts 33 and 34 `serves to place the latter on the proper pulley 32 to reverse the direction of movement of the arm 1 7 after the latter has travelled a pre-determined distance in one direction. It is yet to be pointed out that the block 38 has detachable connection with the arm 17 through the medium of the depending extension 39. In operation, it will be seen that the frames and parts which they carry will be properly adjusted in the guide grooves 8 of the supporting means to position the guiding means at the proper distance from the Crusher rolls 3. When the belt 30 is set into motion7 the remaining belts will likewise be set `into motion and the grinding element 27 will be rotated against thek Crusher roll, at the same time the feed screw 31 will be rotated ,and the arm 17 will be carried from left to right or in an opposite direction as the case may be. Assuming that the stops 36 have been set in proper position, it will be seen that as soon as the extension 37 engages one of these it will move the belt shifting rod 35 in such a way as to automatically shift the belts 33 and 34 onto the proper pulleys 33, thus All() automatically reversing the direction of As before indicated, by properly manipulat-` ing the screws 22 and 24C, the arm 17 can be tilted to the desired degree to insure effective engagement of the grinding disk with the crusher rolls.

A careful consideration of the foregoing description taken in connection with the accompanying drawings will be suiiicient to enable persons skilled in the art to which the invention relates to obtain a clear understanding of the same. Therefore, a more lengthy description is deemed unnecessary.

Advantageous and effective results are practically insured with the construction and arrangement herein shown and described. However, slight minor changes coming within the scope of the subjoined claims may be resorted t0.

I claim:

l. A device of the class described comprising a. pair of spaced upstanding frames, a pair of horizontally disposed rods connected to and extending between the frames, an arm having a bearing intermediate its ends through which one of said rods extends and on which the arm is horizontally slidable and vertically tiltable, a rotary grinding element carried by said arm, means for actuating said element, means for imparting horizontal movement to said arm and co-acting means between the latter and remaining rod to adjust the arm.

2. A device of the class described coinprising a pair of upstanding frames arranged in spaced relation, front and rear horizontally disposed rods arranged between and connected tosaid frames, a vertically tilting and horizontally movable arm provided intermediate its ends with a bearing loosely and slidably mounted on said 3. A machine for truingy crusher rolls and the like comprising apair of brackets, bars secured to said brackets, said bars having guide grooves in their inner opposed faces, upstanding frames having their laterally directed lower ends slidably received in the grooves in said bars,y horizontally disposed forward and rear rods connected to and extending between the frames, a Afeed screw disposed above and also extending between the frames, a carrier arm extending crosswise of said rods, said arm being provided intermediate its ends with a bearing slidable on the)` forward rod, a grinding element rotatably mounted on the outer free end of said arm, a slide arranged on said rear rod, an adjusting screw passing through said slide and having connection with said arm for tilting the latter, a driving connection between the intermediate portion of the arm and said feed screw, and means for actuating the latter and' the aforesaid grinding element.

4. A device of the class described comprising a base, spaced brackets secured thereto, bars detachably and adjustably connected to said brackets, having guide grooves in their inner opposed faces7 frames having laterally turned lower ends slidably received in said grooves, and adjustable grinding means supported on said frames.

In testimony whereof I have hereunto set my hand.

JOSEPH RICHARDSON.

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