US1768137A - Floor-polishing machine - Google Patents

Description

June 24, 1930. E. J; NEWCOMER 1,768,137

FLOQR POLISHING MACHINE Filed Dec. 14, 1926 INV /v ToA Patented June 24, 1930 ERNEST J. NEWCOMEE, OF BALTIMORE, MARYLAND FLOOR-POLISHING MACHINE Application filed December 14, 1926. Serial No. 154,729.

This invention relates to an improvement in floor polishing machines.

The object of the invention is to provide a machine of this character of an improved construction for waxing, polishing or scrubbing a floor without danger of splashing water, dust, dirt or wax into the gears of the machine.

A further object of the invention is to provide for an even distribution of the stresses over the various parts of the machine, and to enclose and protect the reduction gearing so that it is housed in the most confined and eflicient manner.

\Vith these objects in view, the machine is constructed of a brush gear housing having an integral dropped partition in the center which supports the main shaft, and this dropped partition co-operates with a gear case cover seated upon the upper peripheral edges thereof to form a compartment for the reduction-gears of the machine. The driving-motor is mounted above the gear-case cover. An internal ring-gear is secured in a fixed position-in the brush gear housing in position to mesh with the brushgears mounted on brush-shafts, which are in turn supported by an enlarged supporting-plate carried on the main shaft, and which plate extends outwardly substantially to the outer edge of the brush-gear housing to prevent any water, wax, or dust from being thrown into the upper portion of the housing, where it might interfere with the operation of the brush and ring-gears.

The accompanying drawing is a vertlcal sectional view through a machine constructed in accordance with this invention.

A brush gear casing 1 is adapted to en close and house the main portions of the operating parts of the machine, and is provided with upstanding lugs 2 to which the handle-yoke 3 is pivotally mounted for moving the machine over the surface to be scrubbed, waxed or polished.

The brush-gear housing 1 is provided with an upstanding annular ridge 4t upon the top 5 thereof, upon which ridge a gear case cover 6 is seated. A motor housing 7 'is mounted upon the cover 6, and these parts are secured to the ridge 4 by means of the motor-housing screws 8 which extend through the flange on the housin 7 and the cover 6 and into the ridge A. r partition 9 extends downwardly at an angle of substantially 45 from the ridge 4; of the brushgear housing, and is integral with this ridge and the housing. The partition 9 terminates at its lower end in an enlarged bearing 10 formed integral therewith; and on one side of this bearing 10 is a smaller bearing 11.

As shown in the drawings, the partition 9 is substantially cup-shaped, and forms a chamber 12 within the top of the brushgear housing for receiving the reductiongears of the machine.

The numeral 13 indicates the armatureshaft of the motor,'which also carries the fan 14 thereof, and this armature-shaft is mounted in ball-bearings 15 carried by the gear case cover 6. A pinion 16 is fixed on the armature-shaft 13, and meshes with a reductioirgear 17 fixed on the reductionshaft 18 mounted at its upper end in a bearing 19, and at its lower end in the bearing 11. A' reduction-pinion 20 is also fixed on the reduction-shaft 18 and meshes with a driving gear 21 fixed on a'main-shaft 22. This main shaft 22 is mounted in ball-bearings 23 mounted in the main bearing 10 formed in the partition 9.

A supporting-plate 2A is carried on the lower end of the main shaft 22, and is of a diameter only slightly less than that of the brush gear housing 1, so as to lie immediately inside the inner wall of this housing, substantially to close the space thereabove and form a partition between the upper and lower portions of the housing to prevent any water, wax or dust from being thrown into the upper portion thereof. This supporting-plate is provided with integral hubs 25 forming bearings for brush-shafts 26, which support brushes 27 on the lower ends thereof. The upper ends of these brush-shafts above the supporting-plate 24 carry brush-gears 28, which mesh with a ring-gear 29 secured by screws 30 on an internal flange 31 formed in the brush gear housing 1.

The brush gear housing prefer- N ably extends below the upper ends of the brushes or other rubbing elements which might be secured on the shafts 26, in order to house and enclose these rubbing elements to prevent the scattering of any liquid or wax centrifugal force, and to prevent its being thrown out over the floor to any substantial degree.

The chamber 12 for the reduction-gears is preferably packed with grease in order to keep these gears thoroughly lubricated, and this initial packing is usually sufficient for the entire life of the machine.

As the motor is operated, its rotary movement is transmitted to the main shaft 22 through pinion 16, reduction-gear 17, reduction-pinion 20, and drivegear 21, which rotates the supporting-plate 24:, causing the gears 28 to turn within the ring-gear 29, thus giving rotary motion to the rubbing elements 27 for scrubbing, waxing or polishing the floor. The supporting-plate 24 pre ventsany injury to the gearing or bearings by keeping all dust, wax, or liquid out of the upper portion of the brush gear housing 1, thus keeping the machine in better operating condition. 7

The peculiar construction of the partition 9, closed at its upper peripheral edge by the gear case cover 6, provides a compact enclosure for the reduction gearing, keeping all foreign particles therefrom, and insuring the perfectoperation of the machine, as well as providing a compact and light construction, thus making it easy to handle and operate.

I claim:

1. In a machine of the character described, the combination of an outer casing, a motor supported thereby, rubbing members, shafts on which said rubbing members are secured, a fixed-gear mounted at the outer portion of the outer casing, gears fixed on the shafts and meshing with said fixed gear, a supporting plate carrying said shafts and ex tending outwardly beyond the shafts substantially to the edge of said outer casing forming a guard, and means for turning the supporting plate from the motor.

2. In a machine of the character described, the combination of an outer casing having a peripheral ridge formed on the top portion thereof, said top portion having a partition extending downwardly from the ridge at an angle of approximately 45, forming a cupshaped chamber in the top of the casing, said partition being integral with the casing, a main shaft mounted approximately centrally of the partition, rubbing elements connected with the main shaft, a cover-plate mounted on the ridge and approximately closing the top of the chamber, a motor mounted upon the casing above the chamber, and reduction-gearing mounted in the charms In testimony whereof I affix my signature. so

ERNEST J. NEWVGOMER.

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