US2145728A - Grinding machine - Google Patents

Description

Jam 31, 1939. H. J. MANKOFF GRINDING MACHiNE 3 Sheets-Sheet 1 Filed Dec. 29, 1957 IN VENTOR -H1my tf. M/wmFF ATTORNEY.

Jan. 31, 1939- H. J. MANKOFF GRINDING MACHINE Filed Dec. 29, 193'? 3 Sheets-Sheet 2 INVENTOR. Ham) v. M/wra FF B ATTORNEY.

H. J. MANKOFF 2,145,728

GRINDING MACHINE Filed Dec. 29, 1937 3 Sheets-Sheet 3 Jan. 31, 1939.

INVENT OR. fizrweyy zwroFF /"Q M ATTORNEY.

r r v a a a a I f4 Awflaflrralrlan g Patented Jan. 31, 1939 UNITED STATES.

PATENT OFF [C V GRINDING MACHINE Henry J. Mankoi'l, Wichita, Kans. Application December 29, 1937, Serial No. 182,296

3 Claims.

My invention relates to a grinding machine and has for its principal object a rotor grinder of a hammer mill type, having fan blade elements associated with the grinding mechanism, the said rotor grinder hereinafter referred to as rotor.

A further object of my invention is to provide.

a grinding machine that is convertible into a blower to discharge the ground substance into a place of storage.

A still further object of my invention is to provide a grinding machine having a series of devide an air intake at the axis of the rotor, the

said intake to be on one or both sides of the housing, and means to control the volume of air passing therethrough.

A still further object of my invention is to provide a grinding machine adaptable to grinding fodder. straw, or the like as a feed substance, and also to grind grain'or other substance 01' a mineral or like character.

- A still further object of my invention is to provide an adjustable means for the feed chute so that chopped ensilage may be fed through the machine'in such a way as to-avoid contact with the grinding elements of the rotor, in which case the fan feature is the means to conduct such material through a duct to place of storage.

These and other objects will hereinafter be .more fully expla ned, reference being had to the accompanying drawings forming a part of this specification, and in which like characters will apply to like parts in the different views of the structure.

Referring to the drawings: Fig. Lisa side view,.of the grinding machine illustratingthe control means for air inlet, and

" fadju'stablesupport" for the feed chute.

Fig. 2is a sectional ,view ofthagrinding machine taken on line 2-2 in Fig. 3.

Fig. 3 is a sectional view taken on line 3-3 'in Fig. 1.

Fig. 4 is an enlarged end view of one of the hammer grinding elements.

Fig. 5 is a side view of the element, parts removed for convenience of illustration. I

Fig. 6 is a side view of the hammer grinding element, modified with respect to its grinding tip.

Fig. 7 illustrates another modified form of the hammer tip.

The following description of my invention is partially restricted to Figs. 1 and 2, consisting of a housing I substantially arcuate in form, supported by .'a base 2, the housing having a grinding rotor concentrically trunnioned therein, said rotor carried by a shaft 3, that is trun- 5 ,nioned in suitable bearings on each side of said housing, as shown at 4.

Positioned on said shaft is a tubular element 5, through which said shaft extends, and being centrally supported therein by heads 6, the purpose of which is to avoid the flexing of the shaft when a plurality of fan blades 1, are welded to the said tubular element, and the said blades radially extend from the said tube, and equally spaced therearound, as shown in Figs. 1 and 2. Posi- 5 tioned on the outer edge of each blade is an adjustable portion 8, as an extension outward for each blade, said portion being secured by bolts 9, engaging through elongated slots I 0, respectively, sa d slots transversely positioned in the said extensions; being so arranged is means to increase or decrease the velocity of the blast as the rotor turns, and on each blade opposite the said extension is secured a plurality of hammer grinding elements spaced therealong and welded thereto, said elements consisting 'of a sleeve H, in Y which is removably positioned a grinding element I2. Said elements are reversibly arranged to prolong the cutting capacity of the outer tip, as each end thereof is similar in form except the tip shown in Fig. 6, and the said grinding elements l2, and secured by the equivalent of a cotter pin l3, said pin engaging through an aperture in the. sleeve and an aperture positioned in the grinding element withv respect to the same longitudinally. By this arrangement, when the grinding elements become worn or otherwise deteriorated, they are easily withdrawn and reversed, and when both ends become-so d sabled,

it is possible to sharpen each end alike for further engagement.

- Positioned in the annular housing is an arcuate screen N, that is secured in position by engaging ,ensilage or other comminuted material.

pocket is formed between the triangular elements, and in which substance being ground is thrown to avoid its equal rotation with the rotor, and furthermore, to direct the material toward the center of the rotor, where it contacts the said grinding points, and each baifle that is adjacent the said inlet functions as means to retard or restrict the fan blast against outward flow through the feed inlet until each succeeding blade has well passed the feeding point, directing the pressure that will exhaust through the screen and outward through a conductor ll, forcing the ground substance to place of storage, and the said conductor has a cut-off plate i8, pivotally connected at its upper edge as at I 9, and the said plate in its open position is access means for ground substance passing through screen ll outward through said conductor H. The free end of said plate is supported by a rod or chain 20, to an open position, as desired. The feed opening above referred to is equipped with a channeled chute 2|, the outer end of which is supported by brace members 22, connected to the chute and to the housing as at A, at which point the said brace is adjustable to vary the slant of the chute and inward position. The inner end of said chute terminates in close proximity to where it enters the housing, while the bottom continues as at C and D, last said portions having an oifset E, and means to connect the same, the ofiset functioning as a pocket in which substance being ground will recede from the grinder a short distance and, as moved onward, will be in contact with the grinding elements of the rotor.

When said chute is moved inward and downward, the same is supported by rods 23, engaging in apertures 24, selectively, a, plurality of which are spaced downward and through each side of the housing.

When said chute is so positioned and the screen removed, ground substance may be fed in the housing and forced onward through the conductor by the fan faculty of the rotor without contact therewith. In this capacity, the grinding rotor will function as a blast fan, and the substance being conveyed may be similar to that of It will be understood that the air supply for the fan feature is at the ends of the rotor, through the medium of an opening 24, concentric to the rotor shaft, said opening being on each side of the housing and each thereof has a slidingiy arranged member 25, that is diametrically divided so that each half will slide to and from the shaft, and fit closely therearound. The said members slidably engage in tracks 26, at the upper and lower extremity of said sliding members, the said members removable by a lip 21, secured to each, as moving means therefor to a desired position as a control for air inlet to the rotor.

In Fig. 2 isshown a segmental portion 28, of the arcuate housing wall, said portion adapted to rock to and from the feeding chute to govern the vertical width of the opening for the substance entering and moving in contact with the rotor.

It will be understood that shaft 3 has a pulley Bl, secured on the outer end thereof to be engaged by a belt transmitting torque from a motor as turning means for the rotor and belt not shown in the drawings. It will also be understood that the hammer grinding elements are spaced along the edge of each fan blade and being staggered with respect to the blades in their conplurality of fan blades spaced around the shaft,

radially extending and secured thereto, and an extension for each blade and means to adjustably carry the extension at the outer edge of its respective blade, a plurality of sleeves secured to each of said blades and being spaced therealong, a cylindrical grinding element positioned in each sleeve so that one end thereof will extend out- -ward and the said grinding elements being reversible, and means to secure the same in their respective sleeve when selectively reversed.

2. In a rotor for grinding machines, a shaft, a tubular element through which the shaft extends axially and secured together in such a way as to space the wall of the tubular element from.the shaft, a plurality of fan blades spaced around the shaft, radially extending and secured to the tubular element, and an extension for each blade and means to adjustably carry'the extension at the outer edge of its respective blade, a plurality of sleeves secured to 'each of said blades and being spaced therealong, a cylindrical grinding element positioned in each sleeve so that one end thereof will extend outward and the said grinding elements being reversible, and means to secure the same in their respective sleeve when selectively reversed.

3. In a rotor for grinding machines, a shaft, a tubular element through which the shaft extends axially and secured together in such a way as to space the wall of the tubular element from the shaft, a plurality of fan blades spaced around the shaft, radially extending and secured thereto, an extension for each blade, the extension adjustably secured to corresponding sides of the blades and a plurality of sleeves spaced along each blade and being secured to the other sides of the blades, a grinding element insertible in each sleeve, said grinding elements secured in their respective 'sleeves and being reversible with respect to their end engagement, and means to secure said grinding'elements when selectively reversed.

HENRY J. MANKOFF.

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