US1872469A

US1872469A - Grinder

Info

Publication number: US1872469A
Application number: US416839A
Authority: US
Inventors: Lang Franz
Original assignee: W A RIDDELL Co
Current assignee: W A RIDDELL Co
Priority date: 1929-12-27
Filing date: 1929-12-27
Publication date: 1932-08-16
Anticipated expiration: 1949-08-16

Description

Aug. 16, N

GRINDER Filed Dec. 27, 1929 5 Sheets-Sheet l INVENTOR. 5 /4 723 A azy BY Aug. 16, 1932. LANG 1,872,469

GRINDER Filed Dec. 27, 1929 5 Sheets-Sheet 2 INVENTOR. 5 /472; Lazy ATTORN F. LANG Aug. 16 1932.

GRINDER a Sheets-Shet 5 Filed Dec. 27, 1929 INVENTOR. Wag; Lazy 5) m I y ATT Rli i the manufacture-of brick and-like products;

' sive to manufacture.

Patented Aug. 16, 1932 FBA'NZLANG; ossucynus, onro, rissrenon TO w. A. mnnELLooMPAmr oF.BncYRus.

onro, 'a conronATIoN or 02:10

} GRINDER.

Application filedDece mber 27, 1929. Serial'No. 416,839...

This invention, relating as: indicated to grinders, has specific reference'to grinders commonly employed in reducing clay, hard shale, etc, to a suitable fineness preparatory to Grinders for the above purpose as now con structed are excessively heavy, take up unreasonable amounts of floor space, and "are generally constructed in a loosely knit fashion 1 so that the various operating parts are sub ject to unusual amounts of wear and the machine generally is cumbersome beyond the point where a quiet and efficient operation of the grinding'machine is possible. In the construction of such'grinders the grinding operation is performed by a plurality of exceptionally heavy mullers which arerotatably supported and rest upon a rotating bed or an. The material tobe round is fedonto the rotating pan, and in passing under the mullers is crushed to asuitable fineness.

Grinders as now constructed have the shaftf by which the revoluble pan is driven and supported, revolubly supported on a: step or suitable bearing positioned in the pitbelow' the revolu'ble pan. The bearing for axially supporting the shaft when so 130- sitioned'in the pit under the revoluble pan is in direct" communication. with alliof the dirt, dust and ground material. which is discharged from the revoluble pan and therefore the life of such bearing is consequently relatively short. t is an object of my invention to provide a grinder in whi-ch the rev ',-.loluble' pan is axially supported by a bearing lying above the pan and out OfithQ/ZOIIG of deteriorating elements. I

A further dlsadvantage inthe construction of grinders now commonly employed is that the supporting frame for the grinder consists" mainly of wide sprawling legs which lmw terially interfere with free and ready access to the grinding mechanism proper, and which. in'addition are excessively heavy and expen- It'is an object ofinyj invention. to provide a supporting frame structure for a grinder which shall be comp act, rigid and, furnish all the necessary. requirements of'a good frame structure having the added advantage of low cost .of'lnanufac type above described is that when themai terial to be-ground. is fed onto therevol'uble ture, as well as ease and simplicity of assembly. The mullers above referredto, which are revolublycarried by the'grinding: pan, have,

. in structures heretofore" employed, been di 65 rectly supported by the revoluble panan'd' consequently when such mullers pass over the rough material; on such pan the entire mechanism is subjected: to a considerable amount: of unreasonable shock or impact 'destructive to the entire grinding mechanism; I It is an object of'my invention toiprovide-a. means for supporting such:mullers Withree spect to the revoluble pan thata considerable portion of the destructive shock. or impact, due to the operation of such mullers, isiem tirely obviated. r

.A further source of considerable incon-- venience inthe operation ofgrinders of 'the panthe muller which first receives such materialzis apt'to-become choked and the entire operation of the grinding. machine: inters fered with. In order'that the materialto be" ground shall be received" in equal quantities by the-respective mullers on the revoluble pan: 1 have provided i a means wherebye sucheven:; distribution may be effectedand the'efliciency: of the grindingmechanism. appreciably-in: creased. i l

. In thegrinding of dry. or evenwetclay shale, etc., considerable dust is-ra-ised during: the grinding. process, andathis dust has'inthe machines now commonly employed, caused g excessive Wear on the operating parts of'such machine to'the end that the life of the various operating'parts was relatively short, necessitating frequent and expensive: replacement of" parts, which also interferedv with: the, con tinuous operation of the grinder. Itii'safurther obj ect ofmy inventionxto provide 'a'struc-r turein which the various operating parts are so shieldedfrom the dust an'dldirtinithe air so as to'appreciably'add were quietness of? the operation of'the machine" as Wellv as: at

lengthening: of the life of the various operat ing-parts'.

To the accomplishment of the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims; the annexed drawings and the following description setting forth in detail certain structures embodying the invention, such disclosed means constituting, howeveig'but one of various mechanical forms in which the of the invention may be used.

In said annexed drawings: a

Fig. 1 is a part sectional plan View of the grinder comprising my invention; Fig. 2 is a half section half elevation of the grinder shown in Fig. 1; and Fig. 3 is a part section part elevation of the grinder taken on a plane substantially at right angles to the view shown in Fig. 2.

Referring more specifically to the draw ings, and more especially to Figs. 1 and 3, the grinder here illustrated consists of substantially bell-shaped complementary elements 1 and 2, which consist of

reinforced legs

3, 4, 5"and 6 formed integrally therewith, which-serve as a main supporting means for the entire structure. It will be noted in this connection that the legs 5 and 6 above referred to are formedof complementary elements, integral with each of the sections 1 and 2. The

principle sections 1 and 2 are removably secured to each other by means of the bolts 7 so that when such sections are so united they present a substantial bell-shaped body, as shown in Figs. 2 and 3. The supporting

legs

3, 4, 5 and 6 are suitably cross-braced by means of webs 8 and 9 which are so positioned as not to interfere with the ready access tothe interior of the grinding mechanism. The sections 1 and 2 have cross bars 10 and 11' formed integrally I therewith at their upper portions, as most clearly. shown in Fig. 1, which cross bars, when the sections 1 and 2 are in juxtaposition, provide a support for the hollow member 12 which. depends from the supports into the body'of the bell-shaped frame. Positioned within, and upon the top of the bell-shaped body, is adome-shaped member 13, which is removably secured to the body by means of the bolts 14'and has an auxiliary cover 15 rem'ovably secured thereto bymeans of the bolts 16. The dome-shaped cover 13, as most clearly shown in Fig. 2, is adapted at 17 to revolubly support the drive shaft 18 and its associated driving mechanism. The drive shaft .18 is terminally'supportedby friction reduc: ing bearings 19, which are rigidly mounted in the bearing bracket 20 formed integrally with the dome-shaped member 13and is, ad-

jacent its opposite end 21, revolubly support-' l ed by the frictionless bearings 22 which are mounted in the block 23 carried by the extending arm or bracket 24 formed integral with the bell-shaped body adjacent the supporting leg 3. The shaft 18-has rigidly secured theretoadrive pulley 25 by means of the key 26. Associated with the shaft 18 intermediately the

bearings

19 and 22 is a suitable clutch mechanism 27 which, when actuated by the lever 28, may effect driving connection between the shaft 18 and the driving pinion 29 coaxially mounted thereon. A'lubricant duct 30 is provided for introducing a suitable lubricant to the bearing 19.

Positioned within the dome-shaped member 13 is a supporting member 31 which has I an annular ring 32 adapted to support the thrust bearing 33, which in turn supports the thrust element 34 and the thrust ring 35. The thrust ring 35 is secured in a circumferential groove 36 in the upper portion 37 of theshaft 38. The shaft 38 has keyed thereto the hub 39 of the bevel driving gear 40 adapted tointermesh with the driving pinion 29 carried by the driving shaft 18. The upper portion of the shaft 38 is laterally revolubly supported by means of the friction reducing bearing 41 which is positioned intermediately the auxiliary cover 15 and the annular member 42. The annular member 42 has a circumferential skirt 43 formed integrally therewith adapted to serve as a dirtexcluding means for the bearing 41 with the projecting ridge 44 formed integrally with the auxiliary dome member 15.

The shaft 38 is coaxially positioned within the aperture 45 formed centrally of the hollow vertically disposed member 12. The shaft 38 has keyed thereto at its lower portion 46 the pan 47 by means of the key 48. The pan 47 is coaxially secured to the shaft 38 by means of the collar 49 seated in the groove 50 formed in the terminal portion of this shaft. The pan 47 has removably secured thereto the wearing plate 51 by means of the securing bolts 52. The shaft 38 is laterally supportedimmediately above the pan 47 by means of the bushing 53 carried by the removable body 54 secured to the lower end of the hollow member 12. The member 54 has a circumferentially depending skirt 55 formed integrally therewith which, with the member 56, serves as a dust excluding means for protecting the bushing 53 from the dust arising from the revoluble pan 47. The member 56 is secured at its lower end by means of the bolts 57 to the circumferentially extending flange member 58 and the annular member 59, the annular member 59 being removably secured to the pan 47 by means of the bolts 60. The oil-tight cavity formed by the dust excluding members just referred to has an oil sight-gauge 61 secured therein, by means of which the level of the oil in this cavity may be observed through causes the lubricant from the trough 63 to flow by centrifugal force through the conduit 65 onto the face 66 of the gear 40. The lubricant is thence thrown against the side of the dome-shaped aperture and flows back to the trough 63. Some lubricant will find its way down along the side of the shaft 38 through the bushing 53 and into the receptacle therefor formed by the dust-excluding elements terminal portions.

above referred to. It will be seen that the entire operating mechanism is therefore at all times running in a bath of oil and is not subject to the erosive action of the dust necessarily incidental to the grinding operation. The mullers 67, while forming no part of this invention, will be briefly described as formed of a plurality of segments encompassed by a tire 68, which is readilyreplaceable when worn as a result of the grinding operation. The mullers 67 are revolubly mounted by means of the friction reducing bearings 68 on the shaft 69 which, as most clearly shown in Fig. 1, has crank arms 70 and 71 formed integrally therewith on its The crank arms 70 and 71 are suitably ournaled in the bearings 72 and 73, respectively formed therefor in the

legs

3 and 4 of the bell-shaped frame and the vertically disposed hollow member 12. The hollow member 12 and the supporting legs referred to have spring-receiving brackets 74 and 75 formed integrally therewith, as most clearly shown in Fig. 2, which secure the springs 76 and 77 carrying the supporting members 78 and 79. These springs and their associated supporting members sustain the arms 70 and 71 sufiiciently so that when no material is in the pan the mullers 67 will lightly rest on the plates 51.

Circumferentially disposed above the pan 47 is a ringlike member 80 which is adjustably supported from the member 81 by means of the screws 82 and 83. The member 80 has a wear plate 84 removably secured thereto by means of the bolts 85. The purpose of the member 80 and its associate wear plate 84 is to regulate the fineness of the materials which is discharged from the revoluble pan 47. By positioning the wear plate 84 closer to the surface of the rotating table the material which passes from the rotating table thereunder, due to centrifugal force, can be regulated to the desired fineness.

As most clearly shown in Fig. 1, positioned along the side of the feeding ends of the respective mullers are scraper elements 86 supported by the brackets 8? which are removably and adjustably secured to the side frame of the grinder. These brackets supporting the scrapers, are independently adjustable, the amount of material fed under each of the respective mullers can be accurately regulated to prevent the muller adjacent the feed chute from receiving more than its share of the material to be ground.

It will be apparent from I the; above described construction that. the? grinderr com-- prising my. invention has: as: its? salient; few-- tures the axially 7 supported" grinding; pan:

supported at a point above-.theigrinding area 70 providing a means for readily replacing'thewearing edge of such meansso. that the ex- I cessive wear necessarily incidental-to the passage of the ground material" thereunder. will not necessitate the replacement ofthe entire body Jof'the material discharge regulatingi means. Itwill furtherbenoted thatthecon' struction of the scrapers by m'eansofwhich. the material to be groundis fed to the respec tive mullers are adaptableto ready andeasy' adjustment sothat when .the p-an'isrevolving; in the direction ofthe: arrow on Fig.. l the" left-hand muller, as. shown in this figure,

will not. receive more than its shareof thematerialto beground, tliereby preventing the possibility of a chokingr of this muller due. to the entire stream of the raw materiallpassr. ing thereunder. equalizing the streampassing under the respective. mullers notonly is the. quality-of the. groundmaterial materially, enhanced, but' 'the powerconsumption of'the grinder as a wh0le..is.:decreased The structure of the grinder comprising my invention is likewise. particularly advantageous from the standpoint. ofientirely doing; away with right andQleft-handparts,which are a constant source'of annoyance and inconvenience; not only inthe erection of sucli. grinders, but in thereplacement offhroken. or. worn parts. On the whole, a grinder constructed according to the. principles offmy;

invention ismuch lighter than-a construction in accordance with the common types now employed'anda machine which is superior from the standpoint of rigidity as well'as longevity" of thevarious operable parts is'attained:

Other modes of applyingtlie principle of my invention may be employed instead of the one explained, changes being made asregards the mechanism herein disclosed, providedth'e' means stated by any of the following claims or the equivalent of such stated means-be employedi I therefore particularly point out and dis tinctly, claim as-my invention --l. Ina grinding mill, the combination of a supporting frame including plural supple mentary elements adapted to form ahollow bell-shaped body having spaced supporting legs; a cover for said elements; a revoluble pan; reducing agencies cooperating with said pan; a verticallydisposed shaft for supporting and driving said pan,v and means associated withsaid cover for axially and laterallyfsupporting said shaft. v r

2. In agrinding'mill, the combination of asupporting frame including plural supplementary elements adapted to form a hollow bell-shaped body having an axiallydisposed :hollow member; a cover for said body; a

revoluble pan; reducing agencies carried by said pan; a vertically disposed shaft for supporting and driving "said pan positioned within said hollow member; and means associated with said cover fOr axially and laterally supporting said shaft.

' 3. In a grinding mill, the combination of a supporting rame'including plural supplementar-y elements adapted to form a bellshaped body having an axially 1 disposed hollow member; a cover for said body; a revoluble'pan; reducing agencies carried by said pan; a vertically disposed shaft for supporting and driving said pan positioned within said hollow member; means associated with said hollow member for laterally supporting said shaft ;'and means associated with said cover for axially and laterally supporting'said shaft.-

4. In a grinding mill, the combination of a supporting frame including pluralsupplementary elements adapted to form a bellshaped body having an axially disposed l10llow member; a cover for said body; a revoluble pan; reducing agencies carried by said pan; a vertically disposed shaft for supporting' and driving saidpan positioned within said hollow member; means associated with said cover for axially and laterally supportingsaid shaft; a gear wheel mounted on said shaft and enclosed said cover ;a lubricant trough in s aidcover positioned coaxially with said shaft; and means associated with said gear wheel for raising lubricant from said trough to the wearing surfaces thereof upon the rotation of said gear.

5. Ina grinding mill, the combination of plural complementary frame members which when assembled form a hollow bell-shaped frame;a rotatable table, a holow frame positioned coaxi'aly Within said bell, a shaft for rotatably supporting said table, means associated with saidhollow frame and said bell for supporting and driving said shaft, and mullers supported by said hollow frame and said bell over said table Signed by me, this 20th day of December, 1929.

FRANZ LANG.