DE10048322A1 - Roller brushes for removing clippings from surfaces of lawn mower wheels are mounted at angle to horizontal and are lightly pressed against wheels - Google Patents

Abstract

The roller brushes (1) for removing clippings (5) from the surfaces (4) of lawn mower wheels (2) are mounted at an angle of 45 deg to the horizontal and are lightly pressed against the wheels. They are mounted on shafts (3) whose other ends are attached to the mower casing.

Description

Lawn mowers and lawn mowers are well known and have been around since long time in use. They are used for care and cultivation of lawns.

The lawn mowers and lawn mowers are mostly one Internal combustion engine or an electric motor - but also manually driven. The force is transferred to a rotating knife and hiding it in quick rotations then making a lawn cut according to the set cutting height. The clippings are collected in a collecting basket and then disposed of.

The lawn mower differs from the lawn mower mainly by finely chopping the clippings and leaves it there. Since the clippings are made up of approx. 85% moisture and consists of approx. 15% organic nutrients, so do it It makes perfect sense if it is left where it is was harvested, namely on or in the lawn. The has the advantage that the lawn always gets the nutrients to be returned and the lawn hardly additional Fertilizer needed.

Also the problems of disposal, as they arise with lawnmowers stand, do not stand on the lawn mower.

Both lawnmowers and lawnmowers do the job of Lawn shortening where a clippings are produced.

For the lawnmower, most of the clippings become one Collection basket caught, but not completely. It stays Litter remains on and in the lawn.

The grass clippings don't cut at all caught, it stays fully open and lying in the grass what problems with both lawnmowers and lawnmowers caused.

Both implements, the lawn mower and the lawn mower usually have four wheels, two at the front and two at the rear. The tread of the wheels move on the fresh cut lawn, so they take the sticky-wet cut well, there is a kind of "wrap strap" of length the wheel circumference. The main ones are the outer wheels affected.  

When sewing right, it is the two left wheels and vice versa, with the rear wheels being particularly stuck to the clippings. Covering the treads of the wheels with fresh clippings inevitably leads to two problems:
For "binding stairs" on the lawn and for forming holes in the lawn.

If a lawn does not appear flat and even, son slightly stair-shaped, it is precisely because the Diameter of the outer wheels by sticking the moist sticky clippings are constantly increasing. By sticking of the clippings on the profile of the outer wheels becomes crooked location generated; the cut on the outside is higher than the cut on the inside.

At a U-turn, bandage-like cuts usually fall good straps off the treads of the wheels, resulting in a second Problem.

The clippings straps are not removed immediately, which is usually the case the case is, but left lying on the lawn, so bare lawns form underneath, which are quite unsightly for an ornamental lawn. The lawn holes arise because of that Crop belts do not let light through and therefore the one underneath "scald" and "suffocate" lying lawn.

The object of the present invention is to prevent Crop belt formation and thus the prevention of ent problems with the "staircase cut" and the "hole education "in the lawn because the treads of the wheels remain cuttings-free, i.e. clean, so there are inevitably none, Stair formation on the lawn caused by the increase in circumference and also no lawn holes, because with clean wheel tread no clippings and straps can form.

The inventive solution to the two problems mentioned above is that the tread of the wheels of the implement kept constantly clean by roller brushes, even when wet lawn!

The solution itself is realized by being behind / in front there is a roller brush on each wheel, which is approx Impeller is attached. The roller brushes press on lightly the treads of the wheels so that they can be removed from them during the Roll time are set in rotation. Since they offset about 45 ' they constantly brush that off the tread of the wheels cuttings taken away laterally, whereby themselves, by the spring action of the bristles and by centrifugal force, always stay clean.  

Whether the roller brushes the clippings outwards or inwards brush away, is from the position angle of the roller brushes and depending on whether they are mounted behind or in front of a wheel.

It is advantageous if the clippings are brushed away to the outside because the implement is not unnecessary and additional the brushed clippings are contaminated.

Since the roller brushes are preferably made of plastic, so they are weatherproof and do not require an additional layer tion. Due to the slight pressure on the treads of the wheels they are easily rotatable. The roller brushes don't need any additional or separate drive, they are driven by the rolling Wheels of the work equipment, or the resulting resistance, rotated.

Because not every user or owner of a lawn or mulch mower immediately a new, the present invention can and wants to buy this work tool, it certainly is also useful to offer a kit of roller brushes. The The kit is then designed so that it can be retrofitted to any lawn mower or lawn mower from any specialist can be attached securely. The roller axis could be at for example an adjustable ball joint and an adjustable one Show roll axis and thus very variable in the subsequent be attached.

Further description of the present invention will follow explained and described using three drawings:

reference numeral

1

role brushes

2

Lawnmower mulching mower wheels

3

roller axis

4

wheel treads

5

clippings

6

Lawn / mulching mower

7

wheel profile

8th

screw

8.1

washer

8.2

weld

Fig. 1 shows the underside of a lawn or a mulch mower ( 6 ) as a plan view. The working direction is marked from the south to the north and with arrows.

You can see two front and two rear wheels ( 2 ) in front of / behind which the roller brushes ( 1 ) according to the invention are attached by means of roller axles ( 3 ). The roller brushes ( 1 ) rest against the wheel treads ( 4 ) under slight pressure so that they are rotated when the wheels ( 2 ) roll.

By about 45 'Schrählage the roller brushes (1) they brush (1) the cut (5) of the running tread (4) laterally away, so that these (4) always stay clean, even when wet grass. The formation of clippings belts therefore remains, and thus also the development of the above-mentioned problems with "stair and hole formation" in the lawn.

The front wheel roller brushes ( 1 ) brush the clippings ( 5 ) outwards, which is advantageous in that it ( 5 ) does not contaminate the working device ( 6 ). At the rear wheels, the clippings ( 5 ) are brushed inwards.

Figure 2 shows a detail of the present invention. You can see a partial section of the implement ( 6 ) on which the roller axis ( 3 ) is attached as standard. It ( 3 ) is fixed, i.e. permanently installed, only the roller brush ( 3 ) itself can be removed, it ( 1 ) is located on the other end of the roller axis ( 3 ) and is movable / rotatingly slipped on and is held by a disc ( 8.1 ) and a screw ( 8 ) held in position.

The direction of rotation of the wheel ( 2 ) of the implement is marked with an arrow on the tread ( 4 ). Looking at the wheel axle, the wheel turns to the left, while the roller brush ( 1 ) turns to the right, i.e. clockwise.

The approximately 45 'inclined position of the roller brush ( 1 ) causes the clippings ( 5 ) to be brushed away from the wheel tread surface ( 4 ) ( 5.1 ).

Fig. 3 shows the essential details of the present invention on a scale of approximately 1: 1.

In the picture above, the profile ( 7 ) on the wheel tread ( 4 ) is covered by the clippings ( 5 ).

Since the bristles of the roller brush ( 1 ) are approx. 20 mm long, this ensures that profiles ( 4 ) of the wheels are not covered by the clippings ( 5 ).

You can also see the roller brush ( 1 ), which is located on the roller axis ( 3 ). The roller brush ( 1 ) is rotatably held in position by a screw ( 8 ) and a washer ( 8.1 ) which is welded ( 8.2 ) to the roller axis ( 3 ).

Since the roller body ( 1 ) is made of easily sliding plastic, it does not require any special lubrication. The bristles are pressed into the roller body ( 1 ) and consist of a flexible and hard-wearing plastic that is also used for brooms.

Claims (4)

1. Roller brushes for lawn mowers and lawn mulch mowers for removing clippings from the treads of the wheels, characterized in that the roller brushes ( 1 ) are approximately 45 'at an angle to the vertical right lawn mower and lawn mulch mower wheels ( 2 ) and their treads touch lightly, are mounted by means of roller axles ( 3 ) and on the one hand are rotatably positioned on these ( 3 ) and the other ends of the roller axles ( 3 ) are firmly connected to the lawn mower or mulching mower ( 6 ). 2. Roller brushes for lawn mowers and lawn mulch mowers according to claim 1, characterized in that the roller brushes ( 1 ) are preferably made of weatherproof plastic. 3. roller brushes for lawn mowers and lawn mulch mowers according to claims 1 and 2, characterized in that the roller brushes ( 1 ) are preferably about 10 mm wider / longer than the treads ( 4 ) of the wheels ( 2 ) and a diameter of about 80 show mm. 4. Roller brushes for lawn mowers and lawn mulch mowers according to claims 1 to 3, characterized in that the roller axles ( 3 ) are designed to be adjustable and are therefore suitable for retrofitting to existing tools ( 6 ).