US1426984A - Driving mechanism for mixing machines - Google Patents

Description

C. C. G'ULDBECH.

DRIVING MECHANISM FOR MIXING. MACHINES. APPLICATION FILED IAN.3I, 192|.

Ll. Patented Img, 2l 1922.

2 SHEETS-SHEET l.

C. C. GULDBECH..

DRIVING MECHANISM FORMIXING MACHINES.

APPLICATION FILED IAN.3 I. 192|.

AZS@ Patented Allg- 22., R922.

2 SHEETS-SHEET 2.

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,a i .Specification of Letters Patent. l'Il gat;@entreall Auw 22,' T922.,

Application led January- 31,1921. Serial No. dl. l

To all whom it mag/concern -Be it known that l, CARL C. G-ULDBECH, a

' citizen of the United States, and a resident .'countershaft, heretofore of Beacon, Dutchess County, New York, have invented certain new and useful lmprovements in Drivin Mechanism for Mixing Machines, of which the following is a specification. Y

While. my invention relates to improved means for driving mixing elements generally, it has been -applied more specifically1 in connection with the driving of mixing or beating arms or blades of dough mixersemployed in bakeries. @ne object of my in'- vention is to provide a special arrangement of driving'means whereby the mixing blades may be driven at both ends of the machine; the means employed at one end being entirely dissociated from the means employed at the opposite end. l

A further object' of my invention is to so arrange such driving mechanism that l may employ independent motors for driving a pair of bladed shafts, through the medium of suitable gearing directly connected between the shaft or shafts carrying the mixing arms or blades and the motor shaft; which gearing may comprise a worm and worm wheel as the only gearing employed; thereby avoiding the necessity Vof using a employed, for transmittingto the opposite end lof a mixing machine power applied at one end of the same.

These and other features of my invention are more fully ldescribed hereinafter, reference being had to the accompanying Figure 1, is a longitudinal sectional View of one form of mixing machine and driving means therefor, within the scope of my invention.

Fig. 2, is an end elevation of the same.

Fig.` 3, is a view similar to Fig. l, showing a modified arrangement of the driving mechanism. l

Figure d, is a plan view of another form of mixing machine Aand driving mechanism therefor within the scope of my invention;

Figure 5, is an end' elevation of the structure shown in Figure 4;

Figure 6,' is a view, similar to. Figure 4, showing a bowl with another form of mixing mechanism with driving means therefor within the scope of my invention; and

Figure 7, is an end elevation of the same.

As may be readily understood, various arrangements of the'dr-iving motors may .be emplofyed, -and amon the arrangements illustrated in the drawings l have shown a mixing machine having apair of mixing blades or arms arranged to rotate about a common axis; the inner mixing blade being provided with solid shaft ends or trunnions fitting within sleeve shafts or trunnions carried by the outer mixing blades, and each of said mixing" blades or arms carrying a worm-wheel which is arranged to mesh with a worm on a motor shaft; the worm-wheel4 at one end of the machine being attached to a solid shaft end or trunnion of the inner mixing blade, While the worm-wheel at the opposite end of the machine may be attached to one ofthe sleeve shafts or trunnions of the outer mixing blade.

lin lieu of employing worm and wormwheels, the motor shafts may carry pinions 'arranged to mesh with spur Wheels carried by the respective shafts or trunnions; the motors being set in positions substantially at right angles to the position they occupy when worm gearing is employed. As' may be further understood, the motors may be arranged to turn the mixing blades in the same direction or inopposite directions, and the speed of one maybe altered with respect to the speed of the other so as to effeet any result sought to'be obtained in the mixing of material under treatment. lf desired, the motors may be of di'erent capacity.

lin another arrangement, l may provide two sets of mixing arms or blades carried by shafts mounted upon independent axes; the same being geared'together' and the caring at each end. of the machine being drlven by an independent motor.

but it will be understood, of course, that while the movement of one setf of mixing blades or arms ma be at the same speed or ata di'erent spee with respect to the other,

.shaft adapted to bearings at opposite ends of the mixing bowl; each end of sgid shaft 'llhese mlxing blades may be drlven 1n elther direction as desired,

sav

carrying a worm wheel meshing with a worm driven by an independent motor. ln

thev arrangement just described, it will beI chine in the manner described, the torque isl edected gradually and `in thesame ratio at each end of the machine; thereby avoiding .the twisting strain commonly occurring when power is applied at one endonly of a shaft. Av further advantage .is the great leverageobtained by the employment of a worm as the transmitting medium and when employed such worm is preferably provided with multiple threads in order to increase the speed transmitted to the worm wheel.

A stillfurther advantage lies in the fact that the motor being a 'freely rotatable ele-I mentin a magnetic field, it may be halted temporarily under the severe strainof heavy dutyv without breaking or. dislocating the power transmittitng elements.

ln the form of structure illustrated in Figs. 1 and 2, 1- represents a suitable -mix- `ing bowl of any desired'typ'e, within which may be disposed, as illustrated in the preslent-instance, two sets of mixing blades or arms '2 and 3; the mixing blades 2, inthe present arrangement, bein arranged to rotate on the same axis as t e .mixing blades 3, and.` being disposed within the same. rlhe mixing blades or arms 2 may be carriedby suitable end barsal, having projectingmembers 5, constituting trunnions adapted Ato suitable bearings. The mixing blades or arms 3 may be carried by end bars 6, having hollow trunnions 7; the trunnions 5 being disposed within the hollow trunnions 7 and thelatter being adapted' to suitable bearings 8 in end supports or standards y9;

v At one end of the mixing bowl a wormwheel 10.is attached to one ofthe solid trunmons 5, and at the opposite endl of the bowl a worm-wheel 11, similar in size to the wheel 1Q, may be attached to one y of the hollow .trh'nnions 7. Suitably journaled in bearings 112, whichl may be carried bythe endstandards 9, are shafts 13 and la, carrying worms 15 and16, having multiple threads,

three or' tour, as the case may be, which A mesh with the. wormwheels 10` and .11, and

theseshatts 13: and Mare operatively con- .nected with motors' 17 and 18 whereb' said worms 15 'and 16 may be directly riven thereby and impart their movement tothe .worm wheels 10 and 11 v :tor transmission to -the mg bladesor arms 2 and 3.

ln the form ci 'structure illustrated in Figs. 1 and 2, li preferably. provide motors inattesa direction, or said blades or arms may move in opposite directions, in which case the mo- `tors will be moving in the same direction.

In lieu of changing theV direction of movement of the motor armatures, lmay emv ploy any suitable `form of reversible clutches between said motors and shafts; such clutches being diagrammatically illustrated at .19, and these shafts 13 and 14; mayalso be provided with suitable couplings, indil cated at 20.

In the structure shown in Fig. 3, whichmay be of the same type as thatshown in Figs. 1 and 2, I have shown the use of spur gearing between the motors and the shafts carrying the mixing blades or arms; said shafts or trunnions 5 and 7, respectively, being provided with spur wheels 21 and 22,V meshing with driving pinions 23 and '24 carried by motor shafts 13a and 14, driven by motors 17a and 18%, which may dili'er in size; the structure in other respects being vsubstantially similar to that shown in Figs. 1 and 2.

ln the form of structure shown in Figures 4c and 5, two sets .of mixing blades or arms 2? and 3a are shown, which may be carried by independent shafts 5a and 7a, suitably journaled in the end walls ot the mixing bowl and being disposed in lthesame horizontal plane. ln the present instance, the bowl 1 is shown as equlpped with double andsingle mixing blades; the latter a", being arranged to be driven .at aspeed twice that of thedouble mixingblade l2El and beingso setthat the single blade will properly pass the arms of the double blade during their. rotation. The shafts .aand 7a, carrying these mixingblades have gear wheels 2 5 and 26,'` at the respective ends of the structure.

on short shafts `28, journaled insuitable bearings 29, carried by end supports 9b such shafts 28 also serving'v as .the pivots upon which the bowl may be turned-when it is de'- sired to dump the contents of the same.`

rllhese shafts 28 also carry worm-shafts 30, 120

towhich power may be applied by worms 15b and 16h, mounted on-shafts ,13b andla",

driven' by'motors 17b and 181". .ln this ar- .I

rangement, the motors .maybe of the .same

size. As may be readily understood, the m0.- 125' tors for driving the mixing elements in thisterm ofstructure may be arranged in the' manner illustrated in'lFigure 3, and the- .power applied by spur gearing, as indicated l' there In.

These drivingl pinions 27 may be mounted t .I llligures 6 and 7., ll' have show@ a tornarse ineens@- v @L of structure in which two sets of double mixing elementsmay be employed, each of which may comprise pairs of arms or blades 2c and 8, carried by end bars 4 and 6, mounted on independent shafts 5c and 7C. These shafts carry Worm wheels 10c and 11c at their respective ends, and the wormwheels may be driven by right and left hand worms 15c and l5Cc driven by motors 17 and 18. ln this arrangement l may provide the shafts 5c and 7c carrying the worm-wheels with couplings 3l and 82, so 'thatJ these shafts may be disconnected when it is. de=

.sired to dump the mixing bowl; the latter' carrying short shafts or trunnions 33 at its ends, which may be journaled at Bt in the end supports 9, and upon which the `bowl may be turned to dump its contents when said shafts 5c and 7 are disconnected at their respective couplings; y

lt will also be understood that the types of mixing machines illustrated in Figures 4l, 5, 6 and 7, in which pairs of motors, one at each end 0f: the machine, are employed as the driving means for pairs of shafts, may have the motion of the latter transmitted through the 'medium of spur gearing in a manner substantially like that'illustrated in Figure l 3; necessary changes being made to operatively connect the mixing elements and the motors through such form of gearing.

l claim:

l. 'lihe combination, with the bowl of a mixing machine, of a pair of bladed mixing elements disposed withinsaid bowl and rotatable about a common axis, rotatably driven supports for said mixing elements, a motor disposed at one end of the machine for driving one of' said mixing elements, gearing interposed between said motor and the rotatable support for said mixing yelement, a motor disposed at the opposite 'end of the machine for driving the other mixing element, and gearing interposed between said motor` and the support ofsaid second mixing element.

2. The combination, with the bowl ofk a mixing machine,ofapair ofbladed mixing elements disposed Within said bowl and rotatable about a common axis, rotatably driven supports or shafts for said mixing elements, a motor disposed at one end of the machine for driving one of said mixing elements, Worm gearing interposed between said .motor and the rotatable support or shaft for said mixing element, a motor disposed at the opposite end of the machine for driving the other mixing element, and i worm gearing interposed between said motor and the shaft or-support of said second mixing element. y n

3. The combination, in a mixing machine, of a mixing bowl, a pair of bladed mixing elements disposed therein and rotatable y about a common axis, rotatably driven shafts or supports for said mixing elements,

for driving one of said mixing elements, and a motor at the opposite end of the machine for driving the other mixing element; said motors being directly geared to the shafts or supports of said mixing elements.

a. The combination, in a mixing machine, of a mixing bowl, a pair of bladed mixing elements disposed therein, shafts for said mixing elements, a motor disposed at one end of the machine, gearing interposed be` a motor disposed at one end of the machine bowl, independent motors at opposite ends of said machine, and worm gearing operatively connected between said motors and shafts for transmitting movement of the former to the latter.

6. rllhe combination, in a mixing machine,

of a mixing bowl, a pair of mixing elements disposed therein and rotatable about a com? mon axis, a motor disposed at one end of the machine for driving one of said mixing ele= ments, a motor disposed atthe opposite lend of'the machine for driving the other mixing element, and worm gearing for transmitting the movement of said motors to said mixing elements; the worm elements of said gearing having multiple threads. p

n witness whereof .l have signed this specification.v

cant c. ennnnncii.

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