DE102010044301A1 - Scarifier for aerating lawn, comprises housing made of plastic, which carries four rolling or drive wheels, and drive motor, which is arranged in motor space formed as cavity of housing - Google Patents

Abstract

The scarifier (1) comprises a housing made of plastic, which carries four rolling or drive wheels (3), and a drive motor (9), which is arranged in a motor space formed as cavity of the housing. A downwardly open working space is provided, which is arranged on the lower side of the housing for a rotatable blade axle (4) with a scarifying blade (4.1) and a steel spring tine. A reinforcing rib of a wall is arranged on the outer side facing away from the working space.

Description

The invention relates to a scarifier for aerating a lawn, comprising a housing made predominantly of plastic, which carries four running and / or drive wheels, a drive motor, which is arranged in an engine compartment designed as a cavity of the housing, one, on the underside of the housing arranged, downwardly open working space for at least one rotatable knife axis with at least one Vertikutiermesser and / or a steel spring tines, wherein the working space has a wall made of plastic, which has reinforcing ribs, which contribute to the dimensional stability of the wall.

Scarifiers or lawn aerators of this type are well known. For example, the utility model of the applicant, file number DE 20 2007 018 070.5 , referenced. A problem with such Vertikutierern is that often result in the operation of this Vertikutierers constipation, especially if the soil to be scarified is relatively wet, so that accumulates Vertikutiergut within the working space and thereby complicates the ejection, at the same time by the moisture of the material on the walls give thick packs, which eventually clog the work space.

It is therefore an object of the invention to find a scarifier of the type mentioned, in which reduces the tendency to blockage and the cleaning of the working space is facilitated.

This object is solved by the features of independent claim 1. Advantageous developments of the invention are the subject of the subordinate claims.

The inventors have recognized that a significant problem of the aforementioned clogging of the working space is that in the known version of the scarifier, in which the working space is provided with a wall which is made by an injection molded part, there are mold stiffening ribs. These stiffening ribs are basically necessary in order to obtain the shape of the curving wall used here sufficiently, without causing too much material use and excessive weight of the entire device. In the prior art used to date, these stiffening ribs were each located on the inside of the working space, so that in each case Vertikutiergut has set in the corners and edges of the stiffening ribs of the working space, which eventually led easily to blockages. Incidentally, these stiffening ribs also generate a problem in the cleaning of the working space, as set in the angles that are formed between the stiffening ribs and the wall actually, dirt, which can not be solved simply by hand, but thereby appropriate tools necessary are. When using such tools, however, there is often an additional problem that these stiffening ribs are injured, so that ultimately after prolonged use, the loss of one or more stiffening rib (s) is / are complaining and thereby the stability of the wall of the working space suffers.

To solve this problem, the inventors therefore suggest that these stiffening ribs are removed from the area of the working space and arranged on the opposite side, thereby the working space can be designed free of stiffening ribs and largely prevented by the smooth surface now existing setting of Vertikutgut and, in addition, if scarifying matter attaches itself to the wall, it can easily be removed because of the smooth surface of the wall of the working space.

• – ein überwiegend aus Kunststoff hergestelltes Gehäuse, welches vier Lauf- und/oder Antriebsräder trägt,
• – einen Antriebsmotor, welcher in einem als Hohlraum des Gehäuses ausgebildeten Motorraum angeordnet ist,
• – einen, auf der Unterseite des Gehäuses angeordneten, nach unten offenen Arbeitsraum für mindestens eine rotierbare Messerachse mit mindestens einem Vertikutiermesser und/oder Stahlfederzinken,
• – wobei der Arbeitsraum eine aus Kunststoff hergestellte Wandung aufweist, welche Verstärkungsrippen aufweist, die zur Formstabilität der Wandung beitragen.

In accordance with this principle, the inventors propose an improved scarifier for aerating a lawn, comprising:

• - A predominantly made of plastic housing, which carries four running and / or drive wheels,
• A drive motor which is arranged in an engine compartment designed as a cavity of the housing,
• A, arranged on the underside of the housing, downwardly open working space for at least one rotatable knife axis with at least one scarifying knife and / or steel spring tines,
• - Where the working space has a wall made of plastic, which has reinforcing ribs, which contribute to the dimensional stability of the wall.

The improvement is therefore that the reinforcing ribs of the wall are arranged exclusively on the outside facing away from the working space.

It should be noted in this context that under the outside, of course, not the outside of the entire device is meant, but that the outside refers only to the working space. As a rule, the outside of the working space will largely be the inside of the engine compartment above the working space. This smooth design of the working space an improved ejection of Vertikutgutes is achieved, which can now hardly adhere to the walls of the working space.

It is further proposed that the wall of the working space seen in longitudinal section, ie in a side view of a longitudinal section carried out in the direction of travel, having an S-shaped contour. The wall of the working space has thus starting from the bottom upwards continuously first convex curvature towards the working space, which then merges into a concave curvature to the working space.

It is furthermore advantageous if the reinforcing ribs run parallel to the radius of curvature of the wall, preferably in the longitudinal direction, that is to say the direction of travel.

Furthermore, the work space can be flexibly limited on its rear side by a hinged top hinged flap. On the one hand, this flap allows a simplified ejection of the scarifying material to the rear. On the other hand, it can also be used behind the Vertikutierer a pail into which the Vertikutiergut can be thrown and / or blown with the flip open and is collected there.

It is particularly advantageous if the flap over the entire working width of the scarifier, so that the Vertikutiergut passes directly from the scarifier in the direct direction to the collection basket.

In a particularly advantageous embodiment of the scarifier, which, however, also relates to scarifiers in general form, the inventors propose that this scarifier has a driving handle, which has laterally arranged spars, which are connected in height-adjustable manner with the housing.

It is advantageous if the housing laterally each has a cylindrical guide through which the spars are inserted. Here, a fastening device for each spar can be provided at a certain height below the cylindrical guide, each spar having receiving devices for the fastening device in at least two different heights.

Furthermore, the inventors suggest that in the housing there is a height adjustment device with a height indicator.

It is further proposed that the knife axis is made interchangeable and a spring-loaded pin is attached to the housing, which protrudes more or less in a cylindrical recess depending on the positioning of the knife axis in the cylindrical recess and engages directly or indirectly on the interchangeable knife axis, wherein the cylindrical Deepening on its visible from above for the operator cylinder inner wall has a signal color, which is more or less obscured by the pin depending on the position of the blade axis, so that correct or incorrect positioning of the blade axis is displayed.

In a further embodiment of the scarifier, it is proposed that the housing has a separately formed ventilation element with ventilation slots for the engine compartment on the front side. Furthermore, the ventilation element can be formed simultaneously as a motor and / or transmission carrier, so that there is a relatively simple installation of the entire housing.

In the following the invention with reference to a preferred embodiment with reference to the figures will be described in more detail, with only the necessary features for understanding the invention features are shown.

They show in detail:

1 : Front view of the scarifier including the handle;

2 : Bottom view of the scarifier;

3 : Exploded view of the scarifier;

4 : Front view of the scarifier without handle with display of sections AA, BB and CC;

5 : Representation of the section AA from the scarifier from the 4 ;

6 : Representation of the section BB from the Vertikutierer from the 4 ;

7 : Bottom view of the vertigurier shown three-dimensionally;

8th : View of the workroom from below;

9 : lateral view of the section CC from the scarifier from the 4 ;

10 : Presentation according to 9 , but with inserted handle;

11 : Exploded view of the upper part of the housing including the mechanism of the height adjustment and the height adjustment indicator;

12 : Elements off 11 in bottom view.

The 1 shows a scarifier according to the invention 1 in a front view, with one made of plastic housing 2 on which four wheels 3 (only the front wheels are visible) are attached. You can also see the ventilation element attached to the front section 8th with its ventilation slots 8.1 and the left as seen in the direction of travel height adjustment button 6.1 , in the present example, the axis of the two wheels to be recognized here 3 can be adjusted in height. In addition, this front view is a collection basket 13 to be recognized, between the two lateral bars 11.1 of the driving handle 11 located.

The 2 shows the scarifier according to the invention 1 in a view from below, with the housing 2 a workroom 10 in which the knife axis 4 with the attached knifes 4.1 and / or steel spring tines is arranged rotatably. At the top, the working space is delimited by a wall on which, seen from below, no reinforcing ribs are attached, since these reinforcing ribs, which are necessary in themselves, are arranged on the upper side and thus the working space 10 extremely smooth.

The construction of the scarifier 1 is in the 3 shown as an exploded view. This exploded view also illustrates the integrally produced working space housing 14 which the basically necessary reinforcing ribs 14.1 has on the outside of the working space, so that the actual working space in the inventive manner remains free of reinforcing ribs. Furthermore, in this exploded view, the ventilation element 8th shown, which with the vents 8.1 is provided to conduct sufficient cooling air into the engine compartment, in which the engine / transmission combination 9 on the engine / transmission bracket 8.2 is arranged. It should be noted that the engine / transmission bracket 8.2 can also be executed as a separate part.

Further, the flap 5 to recognize, which completes the work space pivoting backwards.

In addition, the wheel axle 3.1 recognizable, which the front wheels 3 höhenvestellbar wears, wherein the height adjustment by rotation of the height adjustment knob 6.1 who has an eccentric 6.2 twisted, is effected. The eccentric engages 6.2 to a u-shaped bulge 3.2 the wheel axle 3.1 on, so that the eccentric to the actual wheel axle 3.1 attached wheels 3 swivel up or down.

To indicate the height adjustment of the wheels is a pin 7.1 provided, which in a sleeve 7.2 that runs in the lid 15 of the housing is sunk. If the height adjustment moves up or down, the pen will be activated at the same time 7.1 more or less in the sleeve 7.2 inserted, which has a correspondingly elaborate color on the inside, so that this color - depending on the height setting - more or less recognizable from the outside.

The 4 again shows the scarifier according to the invention without handle in a front view, in this view, the section AA, BB and CC are defined.

The 5 and 6 The sections AA and BB, in which particularly well designed the free of reinforcing ribs working space 10 it can be seen, in which the at the knife axis 4 located Vertikutiermesser 4.1 to move in a rotating manner. At the top is the work space 10 through its wall 10.1 limited on the outside of the working space to reinforce its structure the necessary reinforcing ribs 10.2 wearing. At the back is the hinged flap 5 recognizable that on the one hand, due to the presence of air and material flow independently can pivot slightly backwards during operation of the verticutter, or in the event that a collecting basket attached is appropriately wide open.

The 7 shows the embodiment according to the invention of a scarifier 1 again in a 3D view from below, whereby here also the working space free of reinforcing ribs 10 can be seen by the knife axis 4 with the attached Vertikutiermessern 4.1 leads.

In the 8th is the working space housing 14 shown, which is preferably designed as an injection molded part. As can be seen from this figure, are located in the workspace 10 on the wall 10.1 no reinforcing ribs, so that the surface is smooth, convex-concave and thus prevents the adhesion of Vertikutiergut is avoided.

To illustrate the height-adjustable attachment of the handle on the housing 2 of the scarifier 1 is in the 9 and 10 again the section CC from the 4 shown in a side view. In this section, which through the stabilization sleeve 12 for the side spar 11.1 of the driving handle 11 leads shown. The 9 makes a cut without inserted side rail 11.1 of the driving handle while in the 10 the side rail 11.1 of the driving handle in the stabilizing sleeve 12 is introduced. In the sleeve 12 On the one hand are four recording devices 12.1 for a fixing pin 12.2 passing through an opening in the side rail 11.1 and the cradle 12.1 of the housing leads. At the same time are on the inside of the stabilization sleeve 12 four detents 12.3 arranged in a complementary survey on the spar 11.1 can engage so that the spar can engage in different heights, here shown four different heights, and correspondingly with the help of the fixing pin 12.2 is fixed. Due to the upward reaching stabilization sleeve 12 can tilt and thus a stable attachment to the housing 2 respectively. Is the drive handle in the appropriate height in the stabilization sleeve 12 has been attached, it can be placed on the outside of an additional cover, so that the inner region of the sleeve is also protected against contamination.

The 11 and 12 show two different views of an exploded view of the housing cover 15 with a height adjustment device consisting of the height adjustment knob 6.1 and the associated eccentric 6.2 and still a pen 7.1 indicating the correct positioning of a replaced knife axis. As already related to the 3 can be described by turning the height adjustment knob 6.1 the associated eccentric 6.2 be rotated so that it acts on a U-shaped bulge of the height adjustment axis of the wheels and thus causes the height adjustment itself.

At the same time, with the help of the pen 7.1 , which acts directly or indirectly on the knife axis, after a new assembly of the knife axis whose correct positioning are displayed by the upper part of the pin 7.1 more or more agile in a pod 7.2 retracts while the cylindrical interior of this sleeve visible more or less visible to the outside. Will the inside of the sleeve 7.2 formed red, the wrong assembly of the knife axis is signaled by visible this color. Basically, this sleeve could 7.2 already in the upper housing part 15 integrated, but it is easier, a very small part - as the sleeve provided here 7.2 - To mark in color on the cylindrical inside, as the complete upper part of the housing 15 to use here. Therefore, in the present embodiment, this sleeve 7.2 separately in the opening in the upper part of the housing 15 used.

It is understood that the abovementioned features of the invention can be used not only in the respectively specified combination but also in other combinations or in isolation, without departing from the scope of the invention.

LIST OF REFERENCE NUMBERS

1

Verticutter

2

casing

3

Wheel

3.1

Wheel axle, height adjustable

4

blade axis

4.1

scarifying

5

flap

6

height adjustment

6.1

Height adjustment knob

6.2

eccentric

7

height indicator

7.1

Height indicator pin

7.2

Height indicator sleeve

8th

ventilation element

8.1

vent

8.2

Engine / transmission mounting

9

Engine / transmission combination

10

working space

10.1

wall

10.2

reinforcing ribs

11

driving handle

11.1

side rail

12

Stabilization sleeve for spar

12.1

cradle

12.2

fastening pin

12.3

detent

13

catch tray

14

Working space housing

14.1

reinforcing ribs

15

Cover shell

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 202007018070 U [0002]

Claims (14)

Scarifier ( 1 ) for aerating a lawn, comprising: 1. a housing made predominantly of plastic ( 2 ), which has four running and / or driving wheels ( 3 ), 2. a drive motor ( 9 ), which in a cavity of the housing ( 2 ) engine compartment is arranged, 3. a, on the underside of the housing ( 2 ), downwardly open working space ( 10 ) for at least one rotatable knife axis ( 4 ) with at least one scarifier ( 4.1 ) and / or steel spring tines, 4. wherein the working space ( 10 ) a wall made of plastic ( 10.1 ), which reinforcing ribs ( 10.2 ), which for the dimensional stability of the wall ( 10.1 ), characterized in that 5. the reinforcing ribs ( 10.2 ) of the wall ( 10.1 ) exclusively on the working space ( 10 ) are arranged outside facing away. Scarifier ( 1 ) according to the preceding claim 1, characterized in that the wall ( 10.1 ) of the working space seen in longitudinal section has an S-shaped contour. Scarifier ( 1 ) according to one of the preceding claims 1 to 2, characterized in that the wall ( 10.1 ) of the working space from bottom to top a convex-concave curvature to the working space ( 10 ) having. Scarifier ( 1 ) according to one of the preceding claims 1 to 3, characterized in that the reinforcing ribs ( 10.2 ) parallel to the radius of curvature of the wall ( 10.1 ). Scarifier ( 1 ) according to one of the preceding claims 1 to 4, characterized in that the reinforcing ribs ( 10.2 ) in the longitudinal direction (= direction of travel). Scarifier ( 1 ) according to one of the preceding claims 1 to 5, characterized in that the working space ( 10 ) on its rear side by a hinged top hinged flap ( 5 ) is flexibly limited. Scarifier ( 1 ) according to the preceding claim 6, characterized in that the flap ( 5 ) over the entire working width of the scarifying knives ( 4.1 ) runs. Scarifier ( 1 ) according to one of the preceding claims 1 to 7, characterized in that it comprises a driving handle ( 11 ), which two laterally arranged spars ( 11.1 ), which with the housing ( 2 ) are height-adjustable connected. Scarifier ( 1 ) according to the preceding claim 8, characterized in that the housing ( 2 ) laterally each have a cylindrical guide ( 12 ) through which the spars ( 11.1 ) are plugged. Scarifier ( 1 ) according to the preceding claim 9, characterized in that below the cylindrical guide a fastening device ( 12.1 . 12.2 ) for each spar ( 11.1 ) is provided in at least two predetermined height. Scarifier ( 1 ) according to one of the preceding claims 1 to 10, characterized in that the housing ( 2 ) with a height adjustment device ( 6 ) is equipped with a height indicator. Scarifier ( 1 ) according to one of the preceding claims 1 to 11, characterized in that the knife axis ( 4 ) is replaceable and a spring-loaded pin ( 7.1 ), which in a cylindrical recess depending on the positioning of the knife axis ( 4 ) protrudes more or less into the cylindrical recess and directly or indirectly on the interchangeable blade axis ( 4 ), wherein the cylindrical recess has a signal color on its upper side visible to the operator from the cylinder inner wall, which depending on the position of the blade axis ( 4 ) through the pen ( 7.1 ) is more or less obscured, so that correct or incorrect positioning of the knife axis ( 4 ) is shown. Scarifier ( 1 ) according to one of the preceding claims 1 to 12, characterized in that the housing ( 2 ) on the front side designed as a separate component ventilation element ( 8th ) with ventilation slots ( 8.1 ) for the engine compartment. Scarifier ( 1 ) according to the preceding claim 13, characterized in that the ventilation element ( 8th ) is simultaneously designed as a motor and / or transmission carrier.

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