DE2616428A1 - DEVICE FOR VENTILATING AND LOOSENING SOIL, IN PARTICULAR LAWN SOIL - Google Patents

Description

Patent attorney Dipl.-Ing. Th. Hoefer

Bielefeld 1, the

Kreuzstrasse 32 P.O. Box 4107

Telephone (0521) 171072 -Telex 9-32 + 49 Bank accounts: Commerzbank AG, Bielefeld No. 6 851 Sparkasse Bielefeld 72 001 Poetscheckkonto: Hanover Office No. 689 28-304

Mess.Akt.Z. 4128/76

Bielefeld kitchen machine and transport equipment factory vom Braucke GmbH, 4800 Bielefeld 1, Meierfeld 14

Device for aerating and loosening soil, especially turf "

609848/0232 ORlGJNAL INSPECTED

2S16428

The invention relates to a device for aerating and loosening soil, in particular turf, with wheels rotatably mounted between side parts, arranged between the side parts, depending on from an eccentric drive, which can be moved in height and equipped with prongs pointing downwards, as well as a slide (handlebar) connected to the side parts.

In such, from the US-PS 3,022,83 ^ become known Device, two piercing parts are arranged one behind the other in the direction of travel of the device, each one in a row on tines and are alternately moved up and down. The vertical movement of the piercing parts takes place through an eccentric connection via rods on an additional, motor-driven wheel.

The wheels of this well-known device have no in & en Ground-engaging running profile, but only roll off on the ground. The prongs of the prongs prick at an angle into the ground, are then taken forward - in the direction of travel and swiveled and then move again obliquely upwards out of the ground, so that when piercing and Pivoting the prongs a certain ground movement occurs, which requires a relatively large force. For this reason, a motorized drive of the device is required for the movement of the lancing part Device, in turn, has a more expensive structure.

Since the wheels only roll on the floor, the device cannot be prevented from lifting off on harder floors. in that the tines, which cannot penetrate the hard ground, push the device up slightly from the ground and thereby the working method and the effect achieved is not achieved.

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The object of the invention is to improve a device constructed according to the type mentioned at the outset to the effect that that it is a structurally simple, easy-to-use and safe-acting device, in particular a hand-held device, in a simple and safe way aeration and simultaneous loosening of the soil, in particular Turf soil, made possible, with the device with each pass (processing strips) a relatively large floor area ventilated gently and avoiding damage to the plant roots or the like and can be loosened so that a beneficial effect is exerted on the soil.

Furthermore, the device should have two different, continuously occurring effects on the Floor can be carried out for optimal floor ventilation.

According to the invention, the device carried out according to the type mentioned at the outset is characterized in that the Wheels have a tooth-like running profile engaging in the ground and that the piercing parts are eccentric with the Wheels connected and movable in height as a function of the wheel rotation as well as counteracting the piercing part penetration effect can be moved in the direction of travel of the device and in the event of non-penetration by a return device in the direction of travel of the device are provided displaceably.

It is preferable to have the device with two devices in the direction of travel Wheel groups arranged one behind the other at a distance, each consisting of three wheels arranged next to one another at a distance equip, of which the two outer wheels of each wheel group rotatably mounted with their axis of rotation in the side parts are, the two adjacent wheels (outer and middle wheel) of each wheel group by an eccentric

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tion are connected to each other in terms of movement, the eccentric bearings of one outer wheel and the middle one Wheel relative to the other outer wheel and the middle wheel of each wheel group are offset from one another, preferably are offset from one another by 180, and between the adjacent wheels of both wheel groups there is a piercing part in the sliding guides held by the eccentric bearings limited back and forth and are mounted alternately movable in height.

The piercing parts each consist of one in sliding guides of the eccentric bearings slidably held guide plate and thereon a plurality of downwardly directed Prongs with the lower side piercing point together, the prongs of bolts or bolts attached to the guide plate wall parts formed out of the guide plate can be formed.

The wheels are preferably formed by disk wheels that have a large number of sawtooth-like, are equipped with their tooth tips running counter to the direction of rotation of the wheel; the teeth are still alternately set, so that their side surface next to the tooth edge grasping under the floor is one under the Forms the ground anchoring abutment and support surface.

The Ruckholeinrichtüngen can be telescoped from one another and by a compression spring or the like. telescoping tubes be formed, one of which with the Eccentric bearings are firmly connected and the other is coupled to the sliding guide plate; the piercing parts can be moved to a limited extent in both directions by means of stops,

The eccentric bearings * can each be supported by two adjacent

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Te wheels connecting and rotating in tubes form rods, the tubes with the fixed telescopic tubes the retrieval devices are connected.

A length-adjustable slide is pivotably mounted on the side parts of the device and is operated by the operator to move the device and to carry out the soil cultivation is acted upon with a thrust force.

The device according to the invention has a simple and cost-saving structure, is easy to use and enables a safe and gentle way of aerating and loosening soil, especially turf. Be with the device advantageously, two different modes of action carried out side by side, which run continuously and optimal soil cultivation without significant damage to the plant roots or the like. These Both effects are dependent on each other and preferably always work together, since the serrated wheels act as the drive and trackers serve and the piercing part inevitably moves will; the serrated wheels penetrate the ground because the piercing part forms a resistance, the wheels makes it difficult to run and thus the teeth have to penetrate the ground with their teeth.

The device has an advantageous size and working width, so that in one pass (the one-time driving over a Soil strip) a relatively large floor area is ventilated and loosened at the same time.

One operation of the device is the toothed wheel disks carried out, which are unrolled under pressure on the floor and with their inclined forward in the direction of travel as well as side set teeth into the ground easily

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penetrate through the tooth edge and the set anchor in the ground, so that a lifting of the device from the ground is excluded and through the tooth anchorages If the teeth emerge, a loosening of the soil and thus ventilation takes place.

The wheels are driven by hand via a slider which is inclined forwards and downwards so that it is horizontal The shear component also creates a vertical compressive force directed against the ground, which conforms to the anchoring the wheels cooperate.

The rotating movement of the wheels is achieved through the use of the crank drive principle (eccentric connection between wheels and piercing parts) in an up and down movement, which results in the second mode of operation of the device is the pricking effect of the prongs on the pricking parts that are inserted into the ground and after being pulled out Have created holes for intensive floor ventilation.

The penetration of the tines into the ground requires a certain vertical force, which is actuated by hand on the one hand Device slide, on the other hand by the dead weight of the device and thirdly by the anchoring in the ground Wheels is reached.

The wheels are constantly rolling on the ground and penetrating into these and thereby effect the anchoring - the grooving with the takes place continuously with this rolling of the wheels Grooving parts that work alternately and also perform their alternating piercing action continuously.

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In the drawings there is an exemplary embodiment according to the invention shown. There are:

Pig. 1 shows a side view of a device for ventilation and Loosening of soil, especially turf, in working position,

Pig. 2 is a plan view of the same device,

Fig. 3 is an end view of the same device, with toothed Wheel disks and prong-like grooving parts,

Pig. ^ - 6 side views in partial section of the same device in several puncture positions of the lancing part3,

Pig. 7 is an end view of a portion of the device in FIG partial cut of the wheel disc and grooving part bearing,

Pig. 8 shows a perspective view of the lancing part with modified guide, partly in an exploded view of the guide,

9 is a side view of a wheel engaged in the ground Teeth, in a working tooth-soil connection.

A device according to the invention, in particular a hand-held device, for ventilation

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and loosening of soil, in particular turf soil lo, has at least two, one each engaging the ground Io Running profile 12 having wheels 11 and an interposed, opposite and displaceable in the direction of travel of the device and vertically movable piercing part 13; the piercing part 13 is preferably eccentrically connected to the wheels 11 and depending on the wheel rotation caused by rolling and engagement of the wheels 11 in the ground Io takes place, movable in height and from the piercing part piercing effect (piercing into the Floor Io) against the direction of travel of the device and through a retrieval device 1 * 1 when not piercing the ground Io in the direction of travel of the device Slidably provided.

The device consists of two in one embodiment in the direction of travel of the device spaced one behind the other and each two held at a distance next to each other and with their Radaehsen 15 in side parts 16 mounted wheels 11 having pairs of wheels and one lying between the wheels 11, with in the ground Io penetrating prongs 17 provided piercing part together, wherein this piercing part 13 can be pushed back and forth in sliding guides 18 is held; the two sliding guides 18 are on the Eccentric mounting 19 attached to each pair of wheels. In the embodiment of the device with two pairs of wheels, that is to say four wheels 11 and one Lancing part i |, the two eccentric bearings 19 are provided at the same distance from the wheel pair axis of rotation 15 and aligned arranged, i.e. they are always parallel and in the same direction along the entire circular path around the wheel axis 15 Rotation angle.

The drawing discloses the preferred embodiment of the ventilation and Loosening device - this has two in the direction of travel of the device At a distance one behind the other arranged pairs of wheels each with three spaced apart wheels 11 and two piercing parts 13 »which each lie between two adjacent wheels 11 of the two pairs of wheels, namely one piercing part 13 between the left and the middle wheel 11 and the other piercing part 13

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between the right and the middle wheel 11 of both pairs of wheels.

The two outer wheels 11 (the left and right wheel 11) of both pairs of wheels are each with their wheel axle 15 in one Side part 16 rotatably mounted and each outer wheel 11 is connected to the middle wheel 11 by an eccentric bearing 19, wherein the two eccentric bearings 19 of each pair of wheels are arranged at the same distance from the wheel axis of rotation 15, however are offset from one another by an angle of rotation, preferably offset from one another by an angle of rotation of 180, so that on two opposite sides of the middle wheel 11 on both sides of the wheel axle 15 a Eezenterlagerung 19 on the middle Wheel 11 attacks.

The two eccentric bearings 19, arranged one behind the other, of the left and middle wheel 11 and of the right and middle Wheel 11 of both pairs of wheels each have a sliding guide 18 and in this sliding guide 18 is a piercing part 13 arranged to be slid back and forth to a limited extent. Through the staggered Eccentric bearings 19 are the two piercing parts 13 in height and in the direction of displacement depending on the wheel position against each other provided offset and there is always only one piercing part 13 in the operative position, with the bottom Io, when the wheel is rotated in a lancing connection, whereby the lancing parts 13 work alternately. The six wheels 11 are always with their profiled Tread 12 in engagement. Instead of the middle wheels 11 in the device version with six wheels 11, you can do this only the levers 25 are used, so that the central wheels 11 omitted. The two side parts 16 are formed, for example, by flat struts, which in their two length end areas each receive a wheel axle 15 rotatably. In the middle length range A slide 2o engages in a pivot axis on both side parts 16 between the wheel axles 15 arranged one behind the other 21 articulated, with which the device is moved by hand for the implementation of the lawn soil aerating and loosening;

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the slide 2o is formed, for example, by a U-bracket, the U-legs of which with their free ends in the side-part bearing axles 21 held pivotable and its U-legs for setting different high or long points of application are designed to be adjustable in length, for example designed to be telescopically displaceable and lockable in one another or of multi-part parts that can be connected to one another by plug, screw or snap locks, such as bracket parts, formed 3ind, on the designed as a handle part of the U-web of the slide 2o can be a curved contact and pressure plate 2ob specify against which the operator with his body (chest and stomach area) an increased pressure on the slide 2o can exercise to move the device.

The wheel axles 15 are defined in the center of the outer wheels 11 bolts, such as screw bolts, formed between the wheel 11 and the side part 16 keep a distance free and with a stepped bolt end 15a under plug connection in a bearing bore 16a of the side parts 16 are detachably held. The two side parts 16 are spaced apart by the slide 2o held together, the U-legs held together by a cross strut 2oa against increasing the distance (diverge) are. The slide bearing axles 21 can be of screw bolts, with nuts, locking bolts, bayonet locking bolts or the like. form. The Raäachsen 15 can, however, also through Determine the screw connection (nuts) on the side parts 16. All wheels 11 of the device are identical and are preferred Way formed by disk wheels, the profiled running surface 12 of teeth formed from the disk wheels 11 are formed.

Each disk wheel 11 has a large number of sawtooth-like or pointed teeth on its circumference 12a, which is opposite to the feed direction of the device (direction of rotation of the wheels 11) are directed so that when the wheels 11 roll on the turf floor Io they first come with their tooth backs 12b

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Penetrate the lawn downwards and in the direction of travel.

Furthermore, it is preferred to alternately turn the teeth I2a of the disk wheels 11 toward its wheel sides (disk planes) set in order to achieve a better anchoring of the teeth in the soil Io. In a further embodiment, not shown the teeth 12a are set so far that they are close to the disc plane and the disc wheel 11 the mode of operation give in the manner of a paddle wheel.

It is also within the scope of the invention to provide the disk wheels 11 with a different, easy penetration and secure anchoring in the soil Io resulting profile surface 12 to be provided; it can also have a certain breadth and with the circumferential surface a support shoulder rolling on the floor Io forming wheel body 11 additionally a toothed profile surface 12 be attached, then the wheel 11 on the Bottom Io rests and the profile surface 12 penetrates into the bottom Io .

The always two juxtaposed eccentric bearing 19 has a the two adjacent wheels 11 each motion • tarr connecting coupling rod 22 which encloses with end edge surface portions 22a as lateral flattened form fit in Ausaparungen 23 of the adjacent disk wheels 11 to the common Scheibenradverdrehung and by nuts 2k or the like. is detachably connected to the disk wheels 11. A tube 25 is arranged around this coupling rod 22, which tube 25 accommodates the coupling rod 22 in a rotatable manner and on which the sliding guide 18 and the return device 1H are mounted.

The screw fastening of the coupling rod 22 to the disk wheels 11 can be reinforced by a tab 26 provided on each disk wheel 11, extending from the wheel axle 15 to the coupling rod 22 or from one coupling rod to the other

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(as with the middle wheel 11) and is also gripped by the rods 22.

The two tubes 25 arranged one behind the other carry underneath two slotted, with their slots facing each other bearing blocks, which together form the sliding guide 18, in which guided the lancing part 13 with a guide plate 27 displaceably, in a horizontal and approximately parallel to the turf floor Io running plane is kept displaceable; the two sliding guides 18 of the two arranged one behind the other Pipes 25 each hold a guide plate 27 that can be pushed back and forth transversely to the longitudinal direction of the pipe.

The guide plate 27 of each piercing part 13 has a length which is greater than the distance between the wheel axles 15 in the direction of travel of the device. A plurality of downwardly directed prongs 17 are attached to this guide plate 27 , the longitudinal direction of which is at least almost at right angles to the plane of the guide plate. The prongs 17 are preferably formed by bolts with circular, with angular, such as hexagonal, square, triangular, or rectangular cross-section, or oval cross-section and run out at their lower end in a point 17 (a cone). The prongs 17 can be equipped at their upper end with a threaded part with which they are screwed into the guide plates 27 - but they can also be welded, preferably by riveting or the like. be held on the guide plate 27. Furthermore, the prongs 17 can be formed by punched-out parts of the guide plate 27.

It is advantageous for the prongs 17 to be offset from one another at the same distance from one another on the entire guide plate 27, and to arrange them in two or more rows (staggered rows).

The retractor 14 for each lancing part 13 is of two Tubes 28, 29 which can be telescoped into one another are formed, of which the tube 28, which is larger in diameter (cross section), passes through

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Welding, screwing, riveting or the like. on the two in a row arranged Exzenter_JLagerung3rohren 25 is attached and the other tube 29 is slidable with respect to the stationary tube 28 and connected to the guide plate 27 in a free-end manner is. The guide plate 27 has a web (high angled part) 27a at its front ends in the direction of travel of the device, on which the the end of the tube 29 facing away from the tube 29 is fastened, releasably held by a screw. In the tube 28 is a pressure element 3o, preferably a compression spring (helical spring) is arranged, which is at one end on the closed face

2 8

side of the tube 28 and the other end at the border in the tube The end face of the tube 29 is supported, and which has the tendency to to push both tubes 28, 29 apart and thus to push the lancing part forward in the direction of travel of the device.

The limitation of the displacement of the tube 29 in both directions of displacement causes the guide plate web 27a on the one hand when it hits the end face of the tube 28 and on the other hand a Stop 31, such as a bolt, web or the like, of the guide plate 27, which cooperates with the rear eccentric bearing tube 25.

In Fig. 9 of the drawing, the operative connection between the teeth 12a and the bottom Io is shown; from this it is clear it can be seen that the tooth edge 12d engages under the bottom Io and the perpendicular forces indicated by the arrows 32 act on the Tooth edge 12d act and hold the disc wheel 12 with the teeth 12a in the ground Io. In addition to these vertical holding forces 32 the floor still acts on the set side surface 12c.

Fig. 8 discloses a further embodiment of the piercing part 13 and its fixing on the eccentric bearing 19. The guide plate 27 is to form the rear stop 31 towards the top angled upwards so that the stop 31 is formed by a wall part of the guide plate 27 and with the eccentric bearing 19 cooperates to limit the movement in the direction of travel.

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6Ü3848 / Q232

" ^{1 | L}

Since the guide plate 27 in this embodiment is angled upwards at both length ends (27a, 31), the tube 25 is the eccentric bearing 19 is divided into three parts in the longitudinal direction so that the guide plate 27 is pushed into the sliding guides 18 can be.

The three pipe parts 25a, 25b, 25c are connected to one another in a rotationally secured manner, for example, by means of a tongue and groove connection 33, they interlock. The two outer tube parts 25a, 25b are of identical design and are each manufactured in one piece with a sliding guide 18. The middle pipe part 25c is by welding or the like. with the tube 28 of the return device 14 in connection. When assembling the device, the rod 22 is ^{pushed into the middle pipe part 25c carrying the return device I 1} I, the guide plate 27 is held under this pipe part 25c, and then the end pipe parts 25a, 25b are pushed onto the rod 22, which then with their Sliding guides 18 overlap the guide plate 27 laterally and keep it guided.

The tubular parts 25a, 25b are secured in the longitudinal direction by fixing the rod 22 to the disk wheels 12.

The operation of the device i3t described above is as follows: To aerate and loosen the lawn soil Io, the device is moved by hand over the Raeenboden Io, with the inclined down and in the direction of travel slider 2o is exerted by the operator a pressure force that the device on the one hand pushes down on the lawn floor Io and on the other hand Moves over the turf floor Io. The toothed disc wheels 11 (all six wheels 11) roll on the turf floor Io and penetrate obliquely into the Raeenboden Io with their teeth 12a forward and down. As a result of the teeth 12a, which are inclined at an acute angle against the direction of travel, they gradually penetrate with them their longer tooth rack 12b in the turf soil Io and the The set design of the teeth 12a results in reduced slip and additional anchoring of the teeth 12a in the R.

609848/0232

Lawn floor lo, since in addition to the toothed edge 12d also the lateral, outwardly directed tooth surfaces 12c under the turf floor Io grasp and the turf floor Io exerts a supporting and holding force on the tooth surfaces 12c, so that the device through the set Teeth 12a held firmly in the bottom Io and not upwards is pushed up.

When the teeth 12a emerge from the turf, cause Io the tooth surfaces 12c loosen the soil Io. The two Piercing parts 13 work alternately and their prongs 17 alternately penetrate the lawn soil Io to aerate it - this one was created by the offset eccentric connection of the two piercing parts 13 on the disk wheels 11.

If a piercing part 13 is fully pierced with its prongs 17 into the turf soil Io, the other plug-in part 13 is with it his prongs 17 fully moved out of the turf floor Io, since the two eccentric bearings 19 in the vertical position in this position Stand on top of each other - the eccentric bearing de »an« e-

s I pricked parts 13 is below the wheel axis of rotation 15 and the Eccentric bearing 19 de3 ineffective piercing part 13 is located above the wheel axis of rotation 15, as this in Fig. 3 and Pig. I. is shown.

In Pig. ^ is the starting position for piercing the prongs 17 of a piercing part 13 is shown, the eccentric bearing being above the wheel axle 15. If you continue to twist the Wheels 11, the eccentric bearing 19 moves down around the wheel axle 15 and thereby also pushes the piercing part 13 further downwards, so that its prongs 17 fully penetrate into the turf soil Io. Is the eccentric 19 at its lowest point arrived, which is below the wheel axle 15 and is in a vertical plane with the wheel axle 15, then the full one Piercing movement carried out (Pig. 5). As the wheels 11 continue to rotate, the eccentric bearing 19 moves further by di « Wheel axle 15 up again and automatically takes the

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Piercing part 13 also with, so that this with its prongs 17 gradually emerges from the turf soil Io again (Pig. 6).

From the start of piercing to the end of piercing, i.e. the starting piercing, the full piercing and the ending piercing and re-emergence of the prongs 17 remains the piercing part 13 are standing, whereas the wheels 11 continue to run. During this process, the tube 28 moves over the tube 29 and the compression spring is compressed. Step on the tines 17 again from the lawn Io, the compression spring 3o can be effective and this pushes the tube 29 and the one connected to it Piercing part 13 in the direction of travel forward, so that the fully ejected (pulled out) prongs 17 for a new one Piercing process are ready and the lead of the wheels 11 is obtained to have.

The wheels 11 always remain with their teeth 12a with the turf floor Io in anchoring and the two piercing parts 13 work alternately, so that two different work processes are carried out in parallel run side by side, namely in that the wheels 11 perform a soil loosening through their teeth 12a and the pricking parts 13 perform soil aeration with their prongs 17.

In the design of the device with four wheels 11 and only one piercing part 13, the wheels 11 for loosening the soil are also in engagement with the turf soil Io and the piercing part 11 pierces one after the other, emerges again, moves forward again through the return device m and then begins the new lancing process.

It is within the scope of the invention, the device with more than two To equip piercing parts 13, then correspondingly more wheels 11 are used and the eccentric 19 against each other are offset by 180 ° each or by a smaller angle of rotation.

There is also the possibility of increasing the effectiveness of the device

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to be increased by a motor drive.

The one on a side part 16 or above both side parts 16 to be arranged motor (electric motor) then drives one or more wheels mounted on the side parts 16, which with teeth standing backwards in the running direction with the bottom Io work together and result in a safe operation of the device.

When the device is designed with only two wheels 11, these are advantageously provided diagonally opposite one another and with the piercing part 13 in between also movement »- moderately coupled and adjustable in height depending on the rotation of the wheel and can be moved lengthways in both directions.

The return device can also only be from a coil spring form as a tension spring or compression spring for each piercing part 13, this spring on the one hand on the guide plate 27 and on the other hand, acts on an eccentric bearing 19. Furthermore, the return device 14 can be operated by a pressure cylinder, a leaf spring that can be stressed in bending, a spring-tensionable one Lever linkage or be formed by rubber buffers.

The disk wheels 11 are reinforced in a further embodiment by beads, which give the thin-walled wheels 11 a high degree of rigidity to lend.

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Claims (1)

Claims 1. Device for aerating and loosening soil, in particular Lawn floor, with wheels rotatably mounted between the side parts, arranged between the side parts, depending on an eccentric drive, which can be moved in height and is equipped with tines pointing downwards Lancing parts and a slide (handlebar) connected to the side parts, characterized in that that the wheels (11) engage in the ground (Io), tooth-like running profile (12) and that the piercing parts (13) eccentrically with the wheels (11) connected and movable in height as a function of the rotation of the wheel and of the piercing part piercing effect Can be moved against the direction of travel of the device and, in the event of non-piercing effect, by means of a return device (14) are provided displaceable in the direction of travel of the device. 2. Apparatus according to claim 1, characterized in that the same two in the device direction of travel spaced one behind the other, each of two spaced apart and with the wheel axles (15) in the side parts (l6) rotatably mounted wheels (11) formed wheel pairs and each pair of wheels on an eccentric bearing (19) has a sliding guide (18) in which the piercing part (13) equipped with tines (17) penetrating into the ground (lo) is mounted so that it can be pushed back and forth to a limited extent, the two eccentric bearings ( 19) of the two pairs of wheels formed from four wheels (11) at the same distance from the wheel pair -'- axis of rotation (I'-j) and arranged in the same direction. 3. Apparatus according to Ansprucn 1, characterized in that the same -18- 609848/0232 two wheel groups arranged one behind the other in the direction of travel of the device, each consisting of three at a distance adjacent wheels (11), of which the two outer wheels (11) of each wheel group are rotatably mounted with their axis of rotation (15) in the side parts (16), each of the two adjacent Wheels (11) - outer and middle wheel (11) - each wheel group through an eccentric bearing (19) with one another Are connected in terms of movement, while the eccentric bearings (19) of the one outer wheel (11) and the middle wheel (11) opposite the other outer wheel (11) and the middle wheel (11) of each wheel group against each other are offset, preferably offset by 180, and between the adjacent wheels (11) of both wheel groups a piercing part (13) in each of the eccentric bearings (19) held sliding guides (18) limited back and forth and stored alternately are mounted movable in height, the three juxtaposed wheels (11) of the two wheel groups one have a coaxial axis of rotation (15) and the two outer wheels (11) of each wheel group with the wheel axis (15) are equipped and that in each case the two wheels (11) of both wheel groups arranged next to one another equipped with rectified eccentric bearings (19) and that all eccentric bearings (19) are arranged at the same distance from their wheel axis of rotation (15). k. Device according to Claims 1 to 3, characterized in that the wheels (11) of the two wheel groups are aligned one behind the other in the direction of travel and that the one or both piercing parts (13) can be moved in height in a constant plane, preferably horizontal plane and thereby on one of the Eccentric bearings (19) -19- 6098 48/0232 and the return device (lh) certain cam path forcibly leads s ind. Device according to claims 1 to h, characterized in that the wheels (11) are formed by identical disk wheels and have on their circumferential surface a large number of sawtooth-like or pointed tooth-like teeth (12a) alternately set on both disk wheel sides, which are opposite to Wheel rotation direction, have a tooth back (12b) that penetrates first into the ground (lo) when the wheel rotates, have a toothed edge (12d) that is anchored under the ground (lo) and one on the outside, anchoring under the ground (lo) Form surface (12c). Apparatus according to claims 1 to h, characterized in that the wheels (11) are of identical design and have profiled teeth on a wheel body with its circumferential surface which rolls on the base (Io), or are provided with paddle-wheel-like teeth . Device according to Claims 1 to 6, characterized in that the two side parts (16) are formed by flat struts are, which each have a bearing bore (l6a) in their two length ends, into which one of a bolt, a screw or the like. formed wheel axle (15) engages releasably with a plug connection, each wheel axle (15) of a wheel (11) passing through and a spacer between wheel (11) and side part (16) having bolt is formed, which is inserted with a bolt part (15a) in the side part bearing bore (l6a) or is held by screw connection. -2o- 609848/0232 Device according to claims 1 to 7, characterized in that on the two side parts (16) between the wheel axles (15) of the two U-bracket-shaped wheel groups Slide (2o) is articulated, preferably pivotably mounted, in the area of its two U-legs Can be changed in length, such as telescopically displaceable and lockable or dismantled, the the free ends of its two U-legs by bolts, screws or the like. educated and on the side panels (16) held pivot axes (21) pivotably grips and by means of a cross strut (2oa) at an unchangeable distance its U-legs is carried out with simultaneous definition of the distance between the wheels (11). Device according to Claims 1 to 8, characterized in that each eccentric bearing (19) has two adjacent ones Wheels (11) at a distance from the wheel axle (15) connecting coupling rod (22) and a coupling rod (22) provided around it, which Rod (22) has in itself rotatably receiving tube (25) on which on the one hand the Versohiebführung (18) and on the other hand the return device (1-0 arranged is, the coupling rod (22) at both length ends with edge surface parts (22a), such as rod flats, form-fit wheel mounting recess (23) through and by means of nuts (23) with the wheel (11) rigidly, but detachably connected. Device according to claims 1 to 9, characterized in that on the underside of each Exaentoriagerung tube (25) two spaced apart, slotted bearing blocks with their slots facing each other are attached, which together each have a displacement guide {! '■ !>) form, in which a guide plate (27) of the piercing part (13) is slidably held and that -21- 609848/0232 this guide plate (27) on its underside several with their longitudinal direction at least almost perpendicular to the guide plate (27) has prongs (17), which are formed by bolts with a circular, angular or oval cross-section, by screwing, welding or Rivet connection on the plate (27) are held at one end and at its other (lower) end one Point (cone) (17a), or formed from wall parts formed from the guide plate (27) are. 11. Device according to claims 1 to Io, characterized in that that on the two eccentric bearing tubes arranged one behind the other in the direction of travel of the device (25) a return device for each piercing part (13) (14) is attached, each two telescopically telescoping and by means of a pressure element (3o) telescopic tubes (28,29) and with the lancing part guide plate (27) is coupled in terms of movement, vjobei a tube (28) of each return device (14) on the eccentric bearing tubes (25) by welding, screwing, renting or the like. is attached, in itself a Takes up the compression spring as a pressure element (3o) and the other tube (29) which can be pushed into the first-mentioned tube (28) with its free front end with a bearing web (27a), like angled wall part of the guide plate (27) is releasably connected, preferably by a screw connection. 12. Apparatus according to claims 1 to 11, characterized in that the guide plate (27) of each piercing part (13) is provided to be limited in both longitudinal directions, a sliding stop of the with the Front end of the pipe (28), which is larger in cross-section, -22- 609848/0232 flow-acting bearing web (27a) and the other sliding stop from one arranged on the guide plate (27), with the rear tube (25) cooperating in the direction of travel stop (31), such as bolt, web Or the like., Is formed. 13. Device according to claims 1 to 12, characterized in that that the same with a motor-driven one arranged on a side part (16) or above the side parts (16) Drive, such as an electric motor, is equipped with at least one driven, connected to the ground (Io) interacting non-slip impeller, like toothed impeller with in the direction of travel to the rear Teeth. 14. Apparatus according to claims 1 to 13 _S, characterized in that the eccentric bearing (19) has a three-part in the longitudinal direction, releasably arranged around the coupling rod (22) tube (25), the three tube parts (25a, 25b, 25.c) are rotatably coupled with each other, for example by tongue and groove connection (33), and the middle pipe part (25c) carries the pipe (28) of the return device (14) (Fig. 8). 60.9848 / 0232 Blank page