Brushing – scrubbing – and general cleaning – Machines – Brushing
Patent
1982-09-08
1985-03-05
Roberts, Edward L.
Brushing, scrubbing, and general cleaning
Machines
Brushing
A47L 1133
Patent
active
045021732
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a floor-sweeping machine consisting of a housing with a revolving brush mounted rotatably therein and having pinions which are provided at its two ends and which are themselves each connected operatively by engagement to a pair of running drive wheels, the two running drive wheels belonging to a particular pinion being mounted rotatably in a wheel case and the wheel case being mounted in appropriate housing receptacles so as to be vertically displaceable for adjusting the height of the revolving brush mounted fixedly in the housing.
In this floor-sweeping machine known from German Offenlegungsschrift No. 2,605,832, force accumulators are provided above the two wheel cases, so that, depending on the contact pressure by which the floor-sweeping machine is pressed against the floor to be cleaned, the wheel cases and consequently the running drive wheels are pressed to a greater or lesser extent into the housing. Because of this, an adjustment of the height of the revolving brush mounted fixedly in the housing takes place as a result of the contact pressure. However, since, when the floor-sweeping machine is used as intended, that is to say when the floor-sweeping machine is moved to and fro, the contact pressure cannot be kept constant, the revolving brush cannot be set permanently to a desired height.
The object on which the invention is based is to provide a floor-sweeping machine of the type explained in the introduction, in which such disadvantages are avoided and a permanent adjustment of the height of the revolving brush is possible in a simple way, without impairing the drive of the revolving brush by the running wheels.
This object is achieved, according to the invention, due to the fact that each wheel case is retained by means of a wheel-case holder, so as to swing on one leg of a U-shaped adjusting shackle, and the U-shaped adjusting shackle is mounted pivotably in appropriate bearings of the housing by means of angled portions, shaped on the free ends of the legs, and an adjustable wedge face pivoting the U-shaped adjusting shackle downwards against the effect of a force accumulator engages on the crown part. As a result, the U-shaped adjusting shackle can, in a simple way, be pivoted continuously by means of the adjustable wedge face into any desired position against the effect of the force accumulator, so that a permanent adjustment of the height of the revolving brush is thereby achieved. Since the two wheel cases are retained by means of wheel-case holders so as to swing on the legs of the U-shaped adjusting shackle, the wheel cases and consequently the running drive wheels can adapt themselves to any unevenness of the floor.
The wheel case can consist of sheet metal and have a U-shaped cross-section, the two side legs receiving the running drive wheels between them having perforations for inserting the axle journals carrying the running drive wheels. Thus, by insertion of the axle journals, the two running wheels are retained in a simple way in the wheel case which can be made cheaply.
The axle journals can consist of the angled ends of an approximately U-shaped spring-wire shackle which is retained on the outer side of one of the two side legs of the wheel case. The two axle journals for mounting the two running drive wheels in a wheel case are therefore connected to one another via an approximately U-shaped spring-wire shackle, so that, when the U-shaped spring-wire shackle is attached, both running drive wheels are retained in the wheel case at the same time.
The crown part and the arcs, located between the crown part and the two legs, of the U-shaped wire shackle can rest, on the outside, against stamped-out tongues of the wheel case consisting of sheet metal. As a result, the U-shaped spring-wire shackle is prevented, in a simple way, from being displaced on the side leg of the wheel case.
The two legs of the U-shaped spring-wire shackle can extend at an angle towards one another with their ends having the axle journals, and the clear width of the perforations pr
REFERENCES:
patent: 3246353 (1966-04-01), Farnsworth
patent: 3444596 (1969-05-01), Soltysik
patent: 3546729 (1970-12-01), Miller et al.
patent: 3638266 (1972-02-01), Fukaba
patent: 4295618 (1981-10-01), Morota et al.
patent: 4325156 (1982-04-01), Rosendall
P/a/ tzold Dieter
Schreiber Alfons
Tiwi Peter
IT&T Industries, Inc.
O'Halloran John T.
Roberts Edward L.
Ruzek Peter R.
Werner Mary C.
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