US2026790A - Rotor for hammer mills - Google Patents

Description

f ,5 made cheaply, y the article Patented Jan. 7, I1936 #UNITED STATES Y`,1 .i1i:-;N'1' OFFICE f i aozsg'iea e i no'ron' Fon HAMMER MILLS Henry'J. Malakoff, IVWichita, Kans. Application September 26, 1933, Serial No. 691,049

"s claims. (ci. isa- 11) 'lllrie device forming the'subject matter of this application is a cylinder or rotor for e.l hammer 'mi11,' and one objectof the invention is `to provide `.a.na.rticle ofthe class described which'may be e Y* possessing great strength, and being capable of; being set up and taken down readily. Another object of the inventionis to Lpro 'de novel, eans'for mounting the hammers. A iurtherobject of theinvention 1,0 is toprovideacylinder'for a hammer which will avoid clogging or choking. It iswithin theprovince of the disclosure to improve generally and toj enhance'theutilityof 1 devices of that typeto whichthe invention appertains.

With the above and other objects in view, which I will appear asthe description proceeds, the'invention resides in the Vcombination and arrangelment `of partsandin the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing `from the spirit of the invention. In the accompanying drawings:

Fig. 1 shows in section, a device constructed in accordance with the invention, parts being in elevation, and parts being broken away;

Fig. 2 isa transverse section of the structure shown in Fig. l;

Fig. 3 is a transverse section showing a modiilcation;

Fig. 4 is a transverse section showing another modification;

' 35 Figs is a sectional view, parallel to the shaft,

and showing a further modin'cation;

Fig. 6 is a transverse section, showing a still further modication;

Fig. 'I is a section oi the structure shown in' 4 Fig. 6, the cutting plane being parallel to the shaf ` 50 may be in the form of like equilateral triangles,

as disclosed in Fig. 2. The plates 5 have openings 6, receiving the shaft I closely. Adjacent plates 5 are mounted on the shaft 4 with their marginal angles 1 out oi registration, the mar- 55 ginal angles of one plate extending outwardly ser the pistes s.

t. In Figs. 1 and 2, there is shown a hammer mill..

fused, with the sumx with respect to the edges of an adjacent plate,

to `render the rotor or cylinder star-shaped in cross section, and to 'form circumferentially spaced projections 8 thereon. `Connections I, which may be rods, pass through the projections 5 e These removable rods 9 are held in place, against longitudinal movement. by cotter pins or other securing devices I0, engaging the projections 8 of the outermost plates 5,

S shown in Fig. 1. 'I'he plates 5 are held tightly 10 together, andl'ef heid on the shaft 4 against relative rotation with respect to the shaft,`by any suitable means, such as nuts I I,`threaded on the shaft, and engaging the outermost plates.`

The hammers are marked by `thenurneral l2, 15 and, as shown in Fig. 2, there is one hammer for each of the plates 5. The inner ends of the hammers I2 are `disposed 'between adjoining plates 5 and are mounted on the connectors 9.

' lThe inner extremities ofthe hammers I2 are re- 20 ceived in seats I4, formed in the edges of the plates `5, the seats giving an additional bearing. of increased strength, for the inner ends of the hammers.

In Fig. 3, parts hereinbefore described are des- 25 ignated by numerals previously used, with the suiiix a. In this form of the invention; the seats Il of Fig. 2 are dispensed with, and the inner extremities ofthe hammers |20; simply abut,

as shown at I5, against one of the marginal edges 30 of the plate 5a.

The structure shown in Figs. 2 and 3 provides for a iixed hammer, but it is within the contem- `plation of the invention that a swinging hammer may be used. Such a construction is shown in Fig. 4. In Fig. 4, parts hereinbefore described have been designated by numerals previously used, with the sumx b. In Fig. 4, the inner portions of the hammers IZb are cut away at their ends and at their sides, as shown at I6, so that o the hammers swingen the connectors 9b.

Sometimes it is desired to use a thicker or heavier hammer, and in this connection, reierence is had to Fig. 5, wherein such a hammer is shown and is marked by the reference character I2c. In Fig.r 5, parts hereinbefore described have been designated by numerals previously In this form of the invention, the plates V5c are arranged in pairs, the members of each pair having their marginal angles 'Ic alined, instead of out of alinement, as shown in Fig. 3. This arrangement gives a wider. space I8, to receive the inner end of the hammer I2C, and also forms -a double-thick mounting for the connectors 9c, 5c

In Figs. 6 and 7, parts hereinbeiore described have been designated by numerals previously used, with the suffix d. In this form of the invention, the hammers are ilxed, because they are held in place by shear rods 2|, passing through the inner portions of the hammers |2d and through the projections 8d of theplates 5d. The shear rods 2| are strong enough to hold the hammers |2d rigidly in place, in the ordinary operation of the machine, but if an obstruction i is encountered, which might do damagathe rods 2| will shear oti, because they are constructed of a material which will permit this operation to take place. 'I'he hammers |211 then can swing over, because their inner ends are rounded, as shown at 20, and because their sides are cut away, as shown at I9.

In case wet and rough materialis being operated upon, such material Will sometimes pass the hammers, and wrap around the shaft 4, for instance. In the present invention, this cannot take place, because the marginal angles 1 serve as cutting elements, which sever the material. The cylinder or rotor, therefore, is kept clean at all times, and is not encumbered with a mass of wound-up material. The construction shown and described provides for the simple construction of a well balanced rotor, since, as shown in Fig. 2, there are six hammers |2 about the periphery of the rotor. By increasing the sizeof the plates 5, the cylinder may be made as heavy as is necessary, togive a fly wheel effect. Although the triangular form of the plate is the vform that ismost acceptable, .and most effective,

the plates neednot be of the triangular form shown in the drawings. ,f

vHaving'thus described the invention, what is claimed is:

1. A rotor for a hammer mill, comprising polygonal plates having aligned openings for the reception of a. shaft, connections each passing removably and in a single length through all the plates and binding themv together in a solid body, the plates having straight marginal edges forming marginal angles. said marginal angles being in alignment in alternating plates, to form spaces between alternating plates, and being out of alignment in adjoining plates, whereby the marginal angles of each plate will form spaced projections, extending beyond the marginal edges of hammers.

2. The rotor of claim 1, wherein, as a further distinction, the plates are in the form of straight sided triangles, symmetrical with respect to said openings, the acuteness of the cutters being enhanced and the eiectiveness of the cutters being increased, due to the specific form of theA plates, the angles of two adjoining plates forming a six-pointed star. n

3. The rotor ofv claim 1, wherein, as a further distinction, the straight edges of adjoining plates are aligned, to double the width of said spaces and to provide for the use of hammers of correspondingly increased thickness and to double the length of the cutting edges of the cutters.

HENRY J. MANKOFF.

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