US2064666A

US2064666A - Crushing machine

Info

Publication number: US2064666A
Application number: US755211A
Authority: US
Inventors: Krushel Adolph
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-11-28
Filing date: 1934-11-28
Publication date: 1936-12-15
Anticipated expiration: 1953-12-15

Description

Dec. 15, 1936.

A. KRUSHEL CRUSHING MACHI NE 2 Sheets-Sheet 1 Filed Nov. 28, 1934 AKRusHEL BY W ATTYJ.

Dec. 15, 1936. A. KRUSHEL cnusnme MACHINE 2 Sheets-sheaf. 2

Filed Nov. 28, 1934 ATTYd min-2:-

Patented Dec. 15, 1936 UNITE PATENT OFFICE. v

1 Claim.

The invention relates to improvements in crushing machines and particularly a machine for crushing granular substances and cereals, such as wheat, oats, barley, rye and an object of the invention is to provide a machine which may be tractor driven and is of high'speed capacity, normally rotating at from 2,000 -to 2,500 R. P. M.

A further object of the invention is to provide a machine which can be manufactured at relatively small cost, which is simple in construction and which has a large capacity for grinding and. which is arranged so that the grinding plates may be easily and quickly adjusted to grind the substance being ground coarse or fine as occasion demands.

A further object is to provide a machine with a worm for feeding the grain to the grinding plates and to arrange the worm so that it will automatically cease to be driven should it engage an obstruction such as a stone and thereby avoid damaging the machine.

A further object is to provide means whereby pressure against the worm may be manually ad- 7 justed as desired through the action of a spring and collar.

A further object is to arrange the crusher so substance being ground coarse or fine as occasion demands.

. A further object of the invention is to provide an angularly disposed reciprocating sieve to screen the substance gravitating into the grinding chamber. a

Withthe foregoing objects in view and such other objects as may appear as the description proceeds, my invention consists in the construction and arrangement of parts, all as hereinafter more particularly described, reference being had to the accompanying drawings, in which:-

Fig. 1 is a side elevation of my machine.

Fig. 2 is a sectional side elevation ofmy machine, showing parts of the main frame in full elevation. 3

Fig. 3 is a front elevation of my machine.

Fig. 4 is an elevation taken on the line 4-4 of Figure 2.

Fig. 5 is a sectional detail of the roller bearings and feed screw adjusting mechanism.

Fig. 6 is a sectional elevation through the worm feed and associated parts.

In the drawings like characters of reference indicate corresponding parts in the different fig-- ures.

My invention consists of a frame work in the form of a trestle A with its base plate drilled for bolting to a suitable foundation and a cast body portion B. This body portion is provided with a base i semicircular in cross section and the body portion being surmounted by a hopper 2, into which the substance fed to the machine is passed. The body is supplied at one side with an outlet opening 3 for the substance which is being expelled by worm feed later described to the crushing plates.

The side of the body containing the opening 3 is extended as indicated at 4 so that it closes one side of a grinding chamber 5, the other side of which is closed by an opposing casing 6, said casing being bolted to the extended portion 4 by means of bolts provided with coiled springs l maintained in bearing contact with projecting ears 8 upon the casing by means of threaded nuts 9. The casing is supplied with a stuffing box H] to which is bolted a shaft housing ii.

A shaft I2 extends clear through the body B, through the stuffing box If! and through the shaft housing I I its rear end being journalled in bearings l3 and M. A sleeve I5 is mounted upon that portion of the shaftwhich extends within the body portion B, this sleeve being provided upon its periphery with a spiral feed screw it. The forward end of this feed screw projects through the opening 3 and into the grinding chamber 5. Upon the rear end of the shaft 12 is a pulley H which may be connected by means of a belt (not shown) to a source of power.

Within the grinding chamber 5 upon the wall 3 is bolted an annular grinding surface 18 while upon the shaft and also within the grinding chamber is a grinding'disc I9, either face of which is bevelled as at l9a inwardly towards the hub. This grinding disc is provided with an annular grinding surface 20 bolted thereto and opposing the surface l8 and the disc is provided with a hub 2|, the inner bearing surface of which is convex in configuration as shown in Figure 6, thus in practice permitting a slight rocking movement of the disc, and this whole disc assembly just described being free to rotate upon the shaft 12 while the grinding surface l8 remains stationary.

A cotter pin 22 extends diametrically through the shaft as clearly shown, the front side of the hub 2| being diametrically notched as at 23 to receive this member. The opposite side of this hub is also notched as at 24 for the purpose of receiving a rib 25 extending diametrically across the front end of the sleeve I5.

A flange 26, in the form of a washer provided with a ball race 21, extends around the reduced end 28 of the shaft l2. The portion 28 of the shaft is diametrically bored to receive a cotter pin 29. A screw threaded spindle 30 extends through the internally threaded boring 3| of the shaft housing and is provided with a head stock 32.

Upon this headstock is mounted an annular ring 33 provided with a circumscribing groove 34. The

grooves

21 and 34 are in alignment, thus forming a ball race 35. The forward end of the spindle 30 is provided with a handle 36 behind which is a tightening nut 31 provided also with a handle.

Upon the shaft I I to the rear of the sleeve I is a collar 38 provided with a jam screw 39. A coiled spring 40 is held in compression between the collar and the rear end of the sleeve, thus exerting a forward pressure against the sleeve. Upon the shaft l2 to the rear of the collar 38 is a cam 4| rotatable therewith.

Vertically above the cam and secured to the rear wall of the body portion B is a cantilevered stub shaft 42. A rocker arm 43 is freely mounted upon this stub shaft and retained thereon by means of a nut 44. The lower end of this rocker arm is bifurcated as at 45, this portion being in engagement with the cam 4| as clearly shown in Figure 4. A bearing at the upper end of the rock er arm is journalled between a split bearing 45, this bearing being rivetted to the under side of an angularly disposed reciprocating sieve 41. It will now be seen. that this sieve is free to move from side to side upon brackets. 48; attached to the side walls of the body portion B.

In operation, the substance is poured into the hopper 2, from thence gravitating downwardly through an aperture onto the sieve 41. It is screened through this sieve and falls into the body portion B. It is moved forwardly under the action of the feed screw through the opening 3 and into the compartment 49 of the grinding chamber 5. Here it falls against the grinding surfaces l8 and 20, afterwards being discharged upon the lower periphery of the grinding chamher and gravitating downwardly through the discharge passageway 50.

In the event of a stone or other obstruction finding its way into the body portion and jamming the rotary action of the screw, this member will simply stop rotating while the disc I9 will continue to revolve without any harm being done due to the fact that the latter is only in light bearing engagement with the sleeve of the former through the rib 25 and its corresponding recess 24.

When it is desired to coarse grind a substance, the tightening nut 31 is slacked off and the spindle 30 rotated in a counterclockwise direction. In this way, a more considerable space is left between the grinding faces l8 and 20. If it is desired to grind finely, the spindle 30 is rotated in the reverse direction.

In order to prevent any possibility of ground grain clogging in the grinding chamber, I have provided the disc 19 at its periphery with horizontally disposed fingers or pins 5| which rotate within the chamber and keep the area between the outer peripheries of the grinding surfaces and the flange of the chamber clear.

In the event of a very large obstruction finding its way into the grinding chamber, the wall. 6 thereof is free to expand against the springs I.

I have not thought it necessary in the drawings to show the entire hopper 2 since this may be of any desired configuration. I desire it to be known, however, that I am able to place my sieve 41 in the hopper instead of Within the portion B if desired, in which case I would of course provide a longer rocker arm 43.

It should also be mentioned that instead of the ordinary cylindrical bearing surface, the surface of the hub 2| is convex towards the centre as at Zla so that the disc I9 is capable of a slight rocking action on the shaft.

Since various modifications can be made in the above invention, and many apparently widely different embodiments of same, made within the scope of the claims without departing from the spirit and scope thereof, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense and I desire only such limitations placed thereon as are specifically expressed in the accompanying claim.

What I claim as my invention is:-

A feed crushing machine comprising, in combination, a supporting trestle, a body portion mounted thereupon, a hopper mounted above said body portion, a crushing chamber attached. to the forward side of said body portion and said supporting trestle, bearings at the apex of said trestle, a main shaft mounted upon said bearings and extending through said body portion and through said crushing chamber, a shaft housing mounted upon the forward side of said crushing chamber, a thrust bearing assembly within said shaft housing, means upon said shaft housing for adjusting the end thrust of said shaft, a pulley mounted upon said shaft between said bearings upon said supporting trestle, a sleeve mounted upon said main shaft, a feed screw extending around said sleeve within said body portion, said sleeve being provided at its forward end with a diametrically disposed rib, a spring mounted upon said shaft to the rear of said feed screw, a stationary annular grinding surface mounted upon the rear wall of said crushing chamber, a r0- tatable grinding disc, a hub at the centre of said grinding disc, said hub being mounted upon said main shaft and being provided upon its rearward face with a diametrically disposed slot, said rotatable grinding disc having the frontand rear faces tapering inwardly towards said hub, horizontally disposed fingers attached upon the peripheral edge of said rotatable grinding disc, an obliquely mounted Oscillating sieve within said body portion, a rocker arm attached to said sieve and extending downwardly within said body portion, a stub shaft extending into said body portion, said rocker arm being mounted upon said stub shaft, a bifurcated portion at the lower end of said rocker arm, a cam mounted upon said main shaft engageable with said bifurcated'portion, a cover plate for said grinding chamber, bolts extending through said casing and into the forward side of said body portion and into the forward end of said supporting trestle, coiled springs extending around the forward ends of said bolts upon the outer side of said casing, means for maintaining said springs in bearing contact with the forward side of said casing.

ADOLPH KRUSHEL.