US1578948A - Crusher - Google Patents

Description

March 30 1926 J. R. BAKSTAD v CRUSHER Filed Oct. l' 23 w eJ...

Patented Mar. 30, 1926.

UNITED STATES w V '1578348 PATE-NT OFFICE;

JOHAN B. BAKSTAD, OF CHICAGO, ILLm'OIS.

CBUSHEB.

g Applloationme d October 1, 1928. Serial No. 665,803.

To all whom it may concern:

Be it known that I, JOHAN R. BAKSTAD,

a citizen of the United States, residing at` Chicago,`in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Crushers, of which the following is a specification.

This invention -elates to crushers.

There are many different types of stone crushers all of which may be used with a degree of success for producing road material which will pass through a one inch ring, as required b v highway departments of many States. However, some types of crushers produce too large a proportion of dust and fine particles; others can treat only comparatively fine stone or cannot crush hard stone. l\ost crushers in use produce a percentage of over-size making necessary, screening and recrushng. Again many types of crushers are unable to produce an appreciable Capacity when crushing to a fine product, or the machine is designed to such dimensions that the price of same is prohibitive for the nature of work in question.

Probably the most successful arrangemcnt for securing the desired results is a combination of crushers, such as a jaw crusher for 'primary breaking, and a disk crusher for secondary breaking, This arrangement, however, in addition to the cost of two machines requires the introduction of sizing screens for the separation of products from primary to secondary units and, usually,

- also equipment for conveying same.

It 'being frequently desirable that the entire combination be portable, it will be ap- A preciated that a single-unit, capable of per; 40 forming properly, is much in demand.

There is, and has been for some years, a growing demand for a crusher that will produce in one operation, or with a single unit, a crushed product that will pass through a one inch ring, from stone or gravel boulders ranging in size from four to six inches, and up.

Accordingly, one object of my invention is to provide a simple, durable, eflicient and relatively inexpensive unitary stone crusher *adapted' to overcome the above mentioned disadvantageous and undesirable features and adapted to successfully 'meet all of the requirements demanded under service conditions.

Another object i's` to provide a stone crusher of the above mentioned characteristics which is of a readily Portable" nature. These' and other objects are accomplished by means of the arrangement disclosed on the accompanying sheet of drawings, in whichi Figure lis a fragmentary vertical sec tional View through a stone ,crusher emmostrecent form for fine crushing having a flat crushing'surface at'the bottom of both stationary and movable dies. However, the jaws can only be made to close to approximately one-fourth of an' inch due to the rough cast die surfaces, and with a jaw slip' through occurs in which the product will not pass through a one inch ring. In addition,.the capacity is very much reduced. It is found even under the circumstances above mentioned, there is a'small percentage of large enough size-to require a two and one-half inch ring' One reason for the slip through is the size of' corrugations in'the dies, but a coarse corrugation is more m fact necessary, when crusha satisfactory, ing boulders or 'rock of the size for which various crushers are designed.

It is my conclusion that the jaw type of 'movement ranging from five-eighths of an 4 inch to three-fourths of an inch considerable crusher is superior in action to all other types and further that 'fine crushing can be successfully accomplished with aw members if the crushing surface be materially increased as the stone is gradually broken up or, in other words, a double path or 'outlet for fine material be provided. Based upon this theory, the present design has been produced by which a standard jaw crusher of any size maybe built as 'a reduction crusher by the introduction of a secondary jaw member interposed between the regular aw members.

ioo

Referring first to Figure 1 of 'the drawings, it will be noted that my invention is disclosed *in connection with a jaw type of crusler having a stationary jaw 10 and a .cooperating Inovable jaw 11, the latter of which is pivotally mounted at its upper end on a shaft 12 for apurpose to be described later. The stationary. jaw is provided with stationary jaw die 14 and the movable jaw' nember ,is provided with a die 15. The novable "jaw is actuated from a main drive shaft 16, through avtumbler shaft 17, tumbler arbor 18 and toggle 19, one end of which toggle. is' carriedn a toggle seat '20 associated with the tumbler arbor and the other end of` the toggle being mounted in a similar toggle 'seat 21 carried by the movable jaw 11. A properly anchored sprng rod 22 connected to the movable jaw 11 holds the toggle 19 against displacement.

. Heretofore, stone fed between the aw dies 20 14 and 15 have been subjected to a crush- 3 arate crushig months are provided. i The y auxiliary die 27 is seated 'at 28 in the stationary jaw and is clanped to sad seat by -a wedge shaped clamping member 29 Secured to the stationary jaw by a bolt 30, the clamping member 29 also acting as a seat or support for the stationary die 14 which is otherwise Secured to the 'jaw by a clamp 13. Similarly, theseconclary jaw die 26 is held in place by a clanp 31, which also forms a seat forlthe die .15 carried by the novable jaw 11, the upper end of the die being clamped in place by a wedge shaped clamping member 32.

The design is so worked out that the open.- ing between the regular jaw dies' 145 and 15 is always approximately twice the area of each opening of the secondary crusher months or equal to the combined ,area of 5 the two. In other words, with an opening of two inches between the regular or primary dies 14 and 15. there will be an opening of only one inch between each set of secondary jaw dies, but the width is the same for all three sets of'dies. This relation will remainthe 'same when changing the jaw opening between the regular dies, because the s'econdary jaw 23 is caused to Swing in unison with the primary movable jaw 11 but therelationship may be changed -as described hereinafter. To acconplish this re aneans of length of toggle 19.

'the secondary jaws on both sides of the incd is an eccentric Shaft, so that the-openings between the secondary swinging jaw and its associated seconda'y dies may be equalized,

if necessary, or to vary the smaller openings with relation to the regular jaw opening'for which it nay be set. For fac'ilitating this. adj ustment it will be noted, also, that the pin orshaft 35 to which link 34 is connected also has an eccentric shaft. The opening between the primary jaw dies is varied by As shown, the secondary swingingjaw 23, 35

which is moun'ed between the main jaws and more particularly between the second-, ary die members carried by the main jaws,

preferably is wedge or bell shaped so that the secondary mouth openings gradually narrow toward the lower or exit'ends therel of. The upperend of said jaw is preferably pointed as at 9 and flared for controlling a division of the flow of crushed material. As' shown in Figure 1, thesecondary swinging jaw member, is pivoted at its upper end, but,

as will be pointed out hereinafter, said secondary swinging menber may be pivotally supported at its lower end.

The lower or secondary dies 26 and 27 nay wo be separate or cast in one piece with the regular or primary dies, but by making all dies separate the primary dies are reversible end for end for double wear, as at present, U

and the secondary dies are not only reversi ble but interchangeable between the stationary and movable jaws; lVith separate jaws the sane may be easily and quickly clamped in place as hereinabove described it being'. noted that the clamps 29 and 31 serve the double purpose of clamping the secondary (lies and seating the primary dies.

In Figure 2 of the drawings an arrangement is shown in. which the primary and secondary dies are cast in a single piece as shown at 36 and 37 respectively: Also there is shown a baflle plate 38 for guiding the clischarge from the main portion of the j aw dies to 'the secondary jaw dies portions.

When stone is crushed between the primary jaws, same being closed as in ordinary practice to from 1 to 2 inch opening, the product is broken up fine enough to enter termediate swinging jaw.

In Figure 3 anarrangement is shownin which the' secondary swinging jaw 39` is pivotally mounted eccent-rically on a. pin 40 at its lower end sothat, when free to Swing as a result'ofiown weight-during the outward movement of the main Swinging jaw 41, the secondary swinging jaw 39 may Swing to the left to maintain equal mouth openings'42 and 43. .The secondary `swinging jaw member is linited in such swingng novement by an adjustable sto'p member 44.

A similar arrangement is shown in Figure 4, which shows, however, the primary and secondary dies and 46 cast integrally, and a spring 46 for assisting gravity in 'moving the intermediate jaw in one direction.

I lVith a 'egulating stop provided for the intermediate swinging jaw to stop its movement in a'central position between tlesecondary die surfaces when the primary moving jaw opens to the end of its st-r'oke, it is seenthat the stone which has entered from above will be crushed on both sides of the intermediate jaw by virtue of the power little more than one-half of the primary movenent, since the primary moving jaw s swung from thetop, and-the distance traveled increases toward the bottom. i

To make the secondary 'crushing action defii'itely` positive, the intermediate jaw may receive' its movement and crushing power independently through connecting rods or toggl'es transmitting power from..

the main shaft. or cam. -This may be accomplished with a connection from the tumbler provided with a second toggle seat for a shorter motion, or a connection from the primary swinging jaw arranged in a manner to transmit, to the intermediate jaw .only on-.halfof the full movement of the primary swnging jaw, The latter arrangement being preferable, is shown in'Figure 1 of the drawings' With this arrangement the regulating -stop, as shown in Figures '3 and 4, becomes unnecessary. Also, the modified arrangement shown in Figura 5 becomes unnecessary, said latter arrangement including a secondary swinging member 4:7 which is yieldably held in a central position by two springs 48 and 49 `Operating between suitable abutments 50 and 51 respectively and a depending portion 52 extending downwardly from the member 47. 4

In certain figures of the drawings and I particularly as shown in-Figure 1, a design is provided witha link or toggle 34 con- IIQCllIfI the primary' and intermediate jaws which by .vrtue of the two point suspension of these parts 'and by ofl'setting the link centers, transmi'ts the desired motion and power to the sccondary crusher months. As pointed out hereinabove the intermediate jaw is Suspended from an eccentric shaft 33, in addition to which the connecting link is also provided with an eccentric shaft -35 for adjustment, so that it is possible and a. simple matter to regulate the openings to suit requirenents.

By means of this crusher itis possible to produce in one operation, the commercial ,one inch product required, and with a' capacity substantially equivalent to the same size standard crusler when turni'ng out a two inch product.

It is my intention to 'cover all modifica-` tions of the invention falling within the spirit and scope of the following clams.'

I claim:

1. In a crusher, the combination of a plurality of cooperating relatively movable' jaw members between which stone is given a primary crushingin a single path, and means movable with one of said other jaw members and cooperating with said' jaw members for giving said stone a secondary crushing in a plurality of paths.

2. In a crusher, the combination of aplu- `rality of cooperating relativelymovable aw m bers between which stone is crushed, an' means m a plane nt-ermedate said aw ing-the stone a secondary crushing.

. 3. In a crusher, the combination of a -members and movable with one of same and plurality of relatively novable jaw members between which stone is erushed in a single path, and movably mounted means in a plane intermediate said jaw members eooperating with the latter for giving the stone a secondary crushing.

4. In a brusher, the combination of a sta'- tionary jaw member, a pivotally mounted jaw member cooperating with said stationary jaw member for crushing stone, and means pivotally mounted ina plane between said stationary and movable jaw members and cooperating therewith for giving the stone a secondary crushing.

5. In a crusher, the combination of. a stationary jaw member, a pivotally mounted jaw member cooperating with said station-` a'y jaw member for' crushing stone, and piv- 'otally mounted means in a plane ntermedate said statonary .and movable aw members for giving the stone a secondary crush- .ng. a

6'. In a 'crusheythe combination of a stationary jaw member, a movable jaw member cooperating with the stationary jaw member for crushing stone, and af second movable jaw member in a plane intermediate said stationary and other movable aw mem bers for gv-ng stonea secondary crushmg.

-7. In a erusher, the -combination of a phi- -rality of relatively movable spaeed jaw members between which stone is crushed, and an additional jaw member spaced from the other two movable in unisoh with one of said aforesaid jaw members for controllina' the size of the o penings between said adlitional and other'at'oresaid jaw members. V

8. In a crusher, the combination of three relatively movable spaced jaw members between ,which stone is crushed, certain of said jaw members beiugmovable in unison "for controlling the size of the openings through which the/stone passes and one of said jaw members being located in a plane intermediate the other two jaw members.

9. In a erusher, the combination of two primary and one secondary relatively mivable aw members arranged whereby st ne is crushed in a single primary path and in;

two seeondary paths, one primary and the seeondary of said jaw members being connected for simultaneous actuation.

10. In a crusher, the eombination of a stationiry jaw member, a movable jaw member cooperating therewith for erushing stone, and a third jaw member eooperating with said other jaw members for giving the stone a secondary crushing, said third jaw member being movable with said othermovable jaw member for controlling 'the size of openings between said jaw members, and means for varyng the size ofsaid openings.

11. In a crusher, the c'ombinationof a stationary jaw member, a movable jaw member cooperating therewith for crushing stone, and a third jaw member cooperating with said other jaw members for giving the stone a secondary erushing, said third jew member being movable with said other m ov-` 'able jaw member forcontrollng the size of openings beween said jaw members, and eccentric means for varying the size of said openings.

12. In a crusher, the combinatiou of a stationary j aw member, a movable jaw member eooperating therewith for crushig stone, a third j aw member cooperating with said'other jaw members for causing a secondary crushing of the stone,`and a link connectiug said third jaw member and said movable jaw member whereby said jaw n'embers may move iu unison.

13. In a crusher, the combination of a stationary j aw mem-ber. a movable jaw' member cooperating therewith for erushing stone, and a third jaw member interposed between said other jaw members for giving stone a i secondary crushing action, and an eceentrie mounting for said third j aw member whereby relative aw openngs may be controlled.

14. In a crushen' the combination of a I stationary jaw member, a pivotally nouuted jaw member cooperating with said tationary aw member tor erushmg stone` a thrd aw member coopera: ing with said other :law

members t'or giving stone a seeondary erushing, a link conneeting said third jaw mem'- ber and thepivotaliy mounted jawmember,'

the connection between said jaw members iucluding an eccetrie shaft, said third jaw e member being mounted upon an eeeentric shaft, and the main pivotally mounted jaw being mounted upon an ecentric shutt whereby the jaw members may have a relative swinging movement and the jaw Open ings controlled. I

Signed at Chicago, Illinois', this 26th day of September, 1923.

JOHAN R. BAKSTAD.

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