US2450993A - Electric motor-driven concrete mixer - Google Patents

Description

Oct. l2, 1948. .1. sANTAGATA 2,450,993

ELECTRIC MOTOR-DRIVEN CONCRETE MIXER Filed April 5, 1945 f 2 sheets-sheet 2 l I N if .mx *El u (52N v E NQ i w m J L' La I n i/entor I WWW Patented Oct. 124, 1948 ortica ELE/critic Moron-unweit CONCRETE Y taxen *Y Joseph Santagata, ranston, It. il. i Application npr'iifs, 1945, ,sensi tiesto' zrciaims.l (cresca-177);

` any house current, and then carry on the desired aimssuccessfully. `Assucli, the machine )is :not

only advantageous to the general public, butis especially usefulfto farmers. I ,l v

In addition to the above, a yc'i'fie'ete mixer provided with an electric motor -propulsion unit-or meansis advantageous in reference to "maintenance or repair work, as the parts ofthe electric drive can be replaced and repaired with greater expediency and reliability than would be susceptible of accomplishment if an intricate gasoline engine were to be contended with.

A concrete mixer constructed in accordance with the principles of this invention c-an be used profitably by contractors due to low operating costs. Being al silent drive, the machine can be operated day or night. On the contrary, gasdriven machines can be operated only during periods, generally in the daytime, when noisy operation is permissible. What is more important, a machine including an electric drive, there beingno fumes or consumption of fuel, can be operated inside of a building if necessary, and, too, this machine can mix more concrete than the gasoline type, this with less horse-power and at more than half the cost. And nally, because of this type of drive, the machine can be built with the requisite compactness and a reduction in weight and towed from place to place with the least amount of time and effort.

Other features and advantages will become more readily apparent from the following description and the accompanying illustrative drawings:

In the drawings, wherein like numerals are employed to designate like parts throughout the same- Figure 1 is an end elevational view of a more or less conventional portable type concrete mixer equipped with an electric motor-driven structure constructed in accordance with the principles of the invention.

2 Figure rvr:i ffisfan end elevation, the gear musing orc've'r 'being removed, and the View being taken ysi'iii'ietifhat on 'theplane of the line 2-2 of Figure l 'Figure f3 is a tuev/'looking 'in the opposite direction, this on the plane of the line :ig-33 of Figure '1. Figure v`41s an exploded "View, that iis, a view showing the individual parts which go vto make "up "the sprocketwheel and pinion assembly.

figures lisa similar View with the parts of said "assembly 'arranged and Yjoined together in opera- 1tiv'e lrel*atin'shiplv Referring4 to the 'drawings vby vdistinguishing ire'ference'numerals, it will be seen that the usual ltyrieo'f con-crete containing and mixing receptacle fisfdented, this atri. 'Itis mounted for rotation inbeaiings P1 on thefraie structure '8 suppdrted from'the chassis 9, the latter carried by customary groundengaging 'wheels I0. The customary "crank: means fis provided at v`I I for dumpingftlie mixer 6.

, I call attention at this time to the pinion and sprocket assembly means shown in Figures 4 and 5. Here we see an adapter bracket or iixture I2 bolted to a frame member I3, said fixture being provided with an axle I4 to accommodate the driven rotor unit. This comprises a bearing sleeve I5 containing a Timken bearing I6 and having outstanding lugs I'I, the latter being bolted to the marginal portion of the pinion gear I8. Parts I5 and I8, of course, surround the shaft I4. There is a similar and longer sleeve at I9 surrounding the shaft, and this is provided with outstanding circumferentially spaced lugs 20 secured by the same bolts to the opposite face or side of the gear I8. The right-hand end portion of the sleeve forms a hub extension 2| for the sprocket wheel 22, the latter being fitted on the hub and bolted to the driving lug 23. The aforementioned shaft extends through the bearing unit 24, where it is secured properly in place by nuts, or the like, 25 (see Figure 5).

The sprocket wheel 22 is driven by a sprocket chain 26 (see Figure 2), which sprocket chain is connected with a smaller sprocket wheel 21 on the shaft of the electric motor 28, the latter suitably mounted on the chassis. The large power takeoff gear is indicated -at 29, this being connected to the right-hand end ofthe rotating shaft of the mixing drum 6.

In actual practice, the gears and sprocket wheels and chain and associated parts are enclosed in an appropriate gear casing orhousing indicated generally by dotted line 30 in Figure 1.

'This is of any appropriate construction, and is therefore not detailed.

It is thought that persons skilled in the art to Which the invention relates Will be able to obtain a clear understanding of the invention after considering the description in connection With the drawings. Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in the shape, size and arrangement of details coming within the field of invention claimed may be resorted to in actual practice, if desired.

I claim:

1. A special motion take-oli and transmitting gearing assembly for use on a conventional con'- crete mixer machine for coaction with a standardtype driving gear on the mixer drum and adapted to accommodate a standard sprocket gear equipped electric motor comprising an adapter xture adapted to be secured rigidly to the frame of the mixer machine, and including an outstanding axle, and a rotor including hub means mounted for rotation on said axle, said hub means including a motion transmitting gear located for coaction with the driving gearon said mixer drum, and further including a sprocket wheel arranged for coaction with a complemental sprocket driven by said motor.

2. In a gear and sprocket adapter assembly f or use on a concrete mixer equipped withjan electric motor, a bracket adapted to be rigidly mounted on a part of the mixer frame, said bracket having an outstanding axle, a sleeve mounted on the inner end portion of said axle and abutting the bracket, said sleeve having outstanding lugs, a gear fastened to said lugs and surrounding the axle, a second somewhat longer sleeve mounted for rotation on said axle and lhaving lugs ,connected to the opposite side of said gear, said second sleeve having outstanding lugs anda portion projecting well beyond said lugs and constituting a hub, a sprocket wheel mounted on said hub and secured to said outstanding lugs, and means for assembling and maintaining all parts on said axle.

3. In a silent electric drive for a concrete mixer machine Which is characterized by a wheel supported chassis and frame, said frame being adapted to suspend a concrete mixer drum and being provided with usual bearings, said drum being provided With shaft means mounted for operation in said bearings, the shaft means at one end being provided with a driven gear, an adapter bracket secured to said frame and including an outstanding axle, gearing means ernbodying a hub mounted for rotation on said axle, said hub embodying a motion transmitting gear aligned with and serving to rotate said driven gear, said hub further including a sprocket wheel, an electric motor mounted on the chassis and including a drive shaft and sprocket Wheel on said drive shaft, said sprocket wheel being lined up with the rst named sprocket wheel, and a sprocket chain trained over said sprocket wheels.

JOSEPH SANTAGATA.

REFERENCES CITED The following references are of record in the Iile of this patent:

UNITED STATES PATENTS

Images