WO2013034248A2

WO2013034248A2 - Soil compactor with illumination arrangement

Info

Publication number: WO2013034248A2
Application number: PCT/EP2012/003527
Authority: WO
Inventors: Michael Steffen
Original assignee: Wacker Neuson Produktion GmbH & Co. KG
Priority date: 2011-09-07
Filing date: 2012-08-20
Publication date: 2013-03-14
Also published as: DE102011112711A1; WO2013034248A3; EP2753759A2

Abstract

An implement for soil compaction has an upper mass (2), a lower mass (3) with a soil contact plate (4), the lower mass being movable relative to the upper mass (2) and coupled to the upper mass (2) via a spring device, a driving device (7) for generating a relative movement between the upper mass (2) and the lower mass (3), and an illumination arrangement (15) having a power generation device (17, 18) and a lighting device (16) electrically coupled to the power generation device (17, 18).

Description

Soil compactor with lighting device

description

The invention relates according to claim 1, a working device for soil compaction, such as a vibrating plate or a rammer. The invention can also be used in other implements in the construction site area with high dynamics of movement, such as in a drilling or break-up hammer.

Working tools for soil compaction are often driven by combustion engines in construction sites. They usually have no generator to which electrical consumers such as lighting could be connected. For this reason, generally no lighting devices are provided on such implements, which could illuminate the machine operator, for example in case of poor visibility, a poorly lit trench. To illuminate external lighting systems are used if necessary, which are placed, for example, at the top of the trench shoulder. However, this requires a high organizational effort, and the shadow of both the trench wall and and the implement itself are disadvantageous. Another way to improve visibility is to use separate battery lights. However, these must be recharged regularly and could be easily lost in rough construction site operation or even stolen. The invention has for its object to provide a working device for soil compaction with improved ease of use and improved operator safety, in particular with regard to the visibility of the operator. This object is achieved by a working device for soil compaction according to claim 1. Further developments can be found in the dependent claims.

An implement for soil compaction has an upper mass, a relatively movable to the O- mass and coupled with the upper mass via a spring device. pelte lower mass with a ground contact plate, a drive device for generating a relative movement between the upper mass and the lower mass and a lighting device with a power generating device and an electrically coupled to the power generating device lighting device.

The soil compacting implement may be, for example, a vibratory plate or a rammer. The implement may also be a drill and / or breaker or a corresponding implement with a high dynamic range of motion of at least one of its components.

The lower mass can be coupled to the upper mass, for example, by a spring device serving as a vibration decoupling device resiliently movable. By the drive device, the upper and the lower mass relative to each other can be set in vibration.

In a vibrating plate, the drive device may be arranged on the lower mass, in a rammer usually on the upper mass or between the upper and lower mass. To generate the vibrations, the drive device may have at least one imbalance shaft with an imbalance mass arranged thereon in the case of a vibration plate. In a rammer, the drive device, for example, a crank mechanism.

Furthermore, a ground contact plate can be arranged on the lower mass and fixed rigidly, for example, which can be displaced by the vibrations of the lower mass in a pounding and / or vibrating working movement. The ground contact plate may vibrate during operation of the implement on the soil to be compacted and compacted.

On the implement, such as a drill or Aufbruchhammer, may be arranged on the lower mass instead of the ground contact plate and another tool, such as a chisel. This tool can be displaced, for example, by a movement of the lower mass into a working movement.

The drive device can be arranged, for example, on the upper mass and / or the lower mass. It may have an internal combustion engine, so that independence from the public power grid or electrical energy storage can be achieved. However, it is also possible that the drive having an electric motor or a hybrid drive with internal combustion engine and electric motor.

The lighting device can be arranged on the working device such that the illumination and illumination of the soil to be processed is enabled and thus a targeted, clean working of the operator is supported. For example, it may be arranged on one side of the implement in the direction of a typical feed movement, for example a front side, with illumination direction downwards. This makes it possible to illuminate the soil to be processed without shadows by the work tool itself, the operator or by the trench shoulder. Objects in the area of the soil to be processed, such as fallen tools, buried cables or obstacles such as rocks, can thus be made visible to the operator and prevented from driving over, so that destruction of the object and a possibly damaging impact on the implement are prevented can be.

The lighting device may include a power generating device that can generate a current for operation of the lighting device. This makes it possible to operate the lighting device without a maintenance-prone electrical coupling to the drive device. Furthermore, the lighting device can be operated independently of an external power supply, for example from a public power grid or other external energy storage. Thus, an independence in operation can be achieved and an expensive and maintenance-prone external wiring can be saved. Furthermore, it is not necessary to carry electrical energy storage devices on the working device for operation of the lighting device, so that the lighting device can be produced inexpensively and operated without further effort for recharging or maintenance of the electrical energy storage. The lighting device may, for example, comprise one or more light sources, such as, for example, an incandescent lamp, a gas discharge lamp, a light-emitting diode (LED), an induction lamp or any desired combinations thereof.

In an embodiment, the power generation device may not be electrically coupled to the drive device and / or may not be coupled to a drive shaft of the drive device. For the operation of the lighting device can be used in this embodiment, for example, a kinetic energy of the working device during a working movement. For example, the power generation device may be self-contained in this embodiment. It can therefore be operated independently of the drive device, in particular independently of this. In particular, the power generation device may be mechanically and / or electrically disconnected from the drive device.

Such independent of the drive device power generating device makes it possible to inexpensively manufacture and operate the lighting device without a maintenance or costly coupling to the drive device. Furthermore, a simple retrofitting is possible without intervention in the drive device on an existing implement.

In another embodiment, the power generation device may include a photovoltaic device for converting light energy to electrical energy. By way of example, the photovoltaic device can have a solar cell which can convert daylight and / or floodlight into electrical energy. The electrical energy can be stored, for example, in an energy store and fed to the lighting device. The photovoltaic device can be arranged, for example, on a surface that is particularly exposed to daylight, such as, for example, the top side of the implement.

In another embodiment, the power generating device may comprise a turbine rotatably arranged in a cooling air flow, in a combustion air flow and / or in an exhaust gas flow. The turbine can be arranged, for example, in the form of a fan wheel or propeller in an air or gas flow through hollow channel or a line device of the working device. The turbine can transmit a torque generated by the kinetic energy of the flowing gas, for example via a shaft to a generator.

For example, the implement may have an air-guiding cooling system by which, for example, an internal combustion engine of the drive device or another component of the implement can be cooled. In a suitable region of an associated cooling air flow guide, the turbine may be arranged.

Likewise, the turbine may be arranged in a suction region or in an air duct of a combustion air flow for supplying sucked combustion air to the engine of the drive device. This makes it possible to use the combustion air flow for generating the current u thus to operate the Leu chtvorrichtung. Likewise, the turbine can be arranged in the region of a discharge of exhaust gas of the internal combustion engine and thus use the outflowing exhaust gas to generate electricity and to operate the lighting device.

In a further embodiment, the power generating device may comprise a generator having a coil means having at least one coil and a magnetic means having magnetically active material, the coil means and the magnet means being movable relative to each other, and moving by moving the magnet means relative to the coil means Power in the coil device can be generated. Furthermore, in a working operation by a working movement of a component of the working device, the magnetic device relative to the Spuleneinrichtu ng be movable. The component may be selected from a group consisting of the upper mass, the lower mass and a coupled to the upper mass and / or the lower mass guiding device.

The guide device allows the operator to guide the work tool over the soil to be compacted. It may for example have a guide bar, a guide frame and / or a guide bracket for pulling, pushing or holding the implement over the soil to be compacted and for controlling the implement in the working mode. For this purpose, a guide handle or handle for an operator can be provided on the guide device, to which also operating elements for operating, for example for driving and interrupting the drive device and / or for switching on or off the lighting device can be arranged.

The generator may be an arbitrarily designed generator for generating power from the kinetic energy of the magnetic device. For example, depending on the type of movement of the magnetic device or the coil device, the generator may be designed as a linear generator or rotary generator.

The magnet device can have, for example, a magnet, an iron core and / or a coil that can be energized and build up a magnetic field as the magnetically active material. The magnet device can be arranged in an interior or in an environment of the coil device. The coil device may comprise, for example, a coil enclosing the magnetic device and / or a system having a plurality of coils suitably arranged in an environment of the magnetic device. The Spuleneinrichtu ng or the Magnetic device may be movable relative to each other periodically or oscillating.

A working operation of the implement, in which the ground contact plate is offset, for example, in a pounding or vibrating contact to the ground, can cause various working movements of said components. For example, the lower mass in periodic or oscillating vertical linear movement or in a substantially rotational, for example piecemeal arc or circular pitching movement can be displaced. Also, the upper mass may be displaceable in a substantially linear or piecewise arcuate or circular working movement. Likewise, the guide device can perform corresponding periodic movements by the coupling to the upper or lower mass. Such working movements can be generated, for example, by jumping or jacking a stamper or shaking a vibrating plate.

Depending on the type of expected working movements at a planned installation location, a suitable generator, for example a linear generator or rotary generator, can be selected. This makes it possible to use the kinetic energy of the components during the working movement for power generation.

As a result, at the moment of operation, the current required by the lighting device can be generated directly from the working movements of the working device and made available to the lighting device. This enables operation of the lighting device independently of other energy sources. Consequently, the lighting device does not require any recharging from external sources, and intermediate storage of the electrical energy is not necessary.

If the power generating device is structurally integrated with the lighting device and / or the lighting device, it can be supplied without additional wiring. Consequently, the lighting device is inexpensive and low maintenance.

In a further embodiment, the coil may be arranged on the said component, that is to say on the upper mass, the lower mass or the guide device, and the magnetic device may be arranged in a cavity substantially freely movable in the direction of the working movement of the component. Since the pounding or vibration is generally associated with a strong jumping and / or shaking, the working movements described for the lower mass, the upper mass or the guide device can have a strong linear partial movement, for example in a direction perpendicular to the surface to be worked. In this case, the power generating device may include a cavity type linear generator in which the magnetic device is disposed. The magnet device may be substantially freely movable in the cavity in at least one direction. Furthermore, stops for limiting the mobility can be provided. For example, the magnetic device within a coil of the coil device in the vertical direction to be freely movable, wherein the mobility on the end faces of the coil can be limited by stops.

During operation of the working device, the magnetic device can be shaken up and down within the cavity, for example, by a working movement of the upper mass. As a result, a current can be induced in the coil device, which current can be made available to the lighting device.

In a further embodiment, the coil device can be arranged on the component and the magnet device can be arranged on a component selected from the group other than the coil device.

For example, the coil device may be arranged on the lower mass and the magnetic device on the upper mass, or alternatively the magnetic device on the lower mass and the coil device on the upper mass. The coil device can also be arranged on the upper mass and the magnet device on the guide device, or alternatively the magnet device on the upper mass and the coil device on the guide device. Furthermore, the coil device can be arranged on the lower mass and the magnet device on the guide device, or alternatively the magnet device on the lower mass and the coil device on the guide device.

By means of a relative movement between the component and the other component, in this embodiment the coil device and the magnet device can be displaced relative to one another in a relative movement. In other words, in this embodiment, for example, an oscillating relative movement between said components is used in order to set the coil device and the magnetic device in an oscillating relative movement to each other. Consequently, the power required by the power generation device obtained netic energy from the working movement of the implement and in particular the relative movements between the components of the implement in the working mode.

In a variant of this embodiment, the generator may be a rotary generator, which is operable by a relative rotational movement of the guide device to the upper mass.

For example, between the guide device and the upper mass vibration decoupling devices such as elastic buffers may be arranged, which allow only a muted introduction of the vibrations of the upper mass in the guide device. As a result, the hand-arm vibration can be reduced to an operator handle of the guide device. Due to the vibration decoupling, a relative movement between the guide device and the upper mass can arise, through which the generator is operable.

For example, by such a vibration decoupling an inclination angle of the guide device relative to the upper mass by, for example, 5 ° to 30 ° vary, whereby despite the working movement of the upper mass vibration introduction to the operator's hand can be kept low. In this case, the generator can be designed, for example, as a rotary generator and arranged between the upper mass and the guide device, wherein the rotary generator is operable by the relative rotational movement of the guide device to the upper mass.

In a further embodiment, the coil device can be arranged on a guide tube of the upper mass for guiding a shaft device of the lower mass and the magnet device on the shaft device.

This arrangement can be used for example in a rammer, in which the ground contact plate can be inserted vertically movable over the shaft device in the guide tube of the upper mass. At this point, for example, a dirt wiper or a cuff element may be provided, in which the coil device may be arranged. Furthermore, the magnetic device can be arranged on the shaft device in such a way that it is moved up and down during a ramming operation during operation within the coil device. In a further embodiment, the drive may comprise an internal combustion engine with an ignition device. The ignition device may include a movable by a crankshaft of the drive magnet for generating an ignition voltage of the internal combustion engine. Furthermore, the power generation device can have a coil inductively energized by a movement of the ignition magnet.

In this embodiment, the ignition device may be partially structurally integrated with the power generation device. For example, the ignition magnet act as a magnetic device and in addition to the induction of the ignition voltage for generating a spark for igniting a gas mixture in a combustion chamber of the internal combustion engine also induce a further voltage in the coil indu. This makes it possible to inexpensively integrate the power generation device with the ignition device and to reduce the number of required components.

In a further embodiment, the lighting device has an electrical energy store for storing energy generated by the power generation device and for outputting the stored energy to the lighting device. The electrical energy store may, for example, have a rechargeable battery of a suitable power class, such as a lithium ion rechargeable battery.

The use of the electrical energy storage makes it possible to continuously generate power during operation and store or buffer. This current can also be generated, for example, when lighting by the lighting device is not needed. If, however, illumination by the lighting device is advantageous at a different time, then the energy required can also be subtracted from the pre-charged electrical energy store if the work appliance temporarily fails to carry out the working movement.

In a further embodiment, an evaluation device for detecting an operating state by Au swerten a time course of a current generated by the power generating device may be provided. In this case, the lighting device can be switched on and / or off depending on the operating state and / or a color or flashing frequency of the light emitted by the lighting device as a function of the operating state can be determined. By way of example, a current can be induced or generated at the generator by carrying out a tapping or vibrating movement which essentially follows a characteristic characteristic of the working movement. This can be recognized on the basis of a characteristic-based evaluation, for example, and be used for switching the lighting device on or off. This allows a demand-driven control of the lighting device.

For example, different working movements of a vibrating plate may be due to a varying orientation of the imbalance masses. By the evaluation device, it is possible to detect with the working movement and a direction of movement of the vibrating plate based on the induced current and according to the direction of movement to control a front or back lighting of the vibrating plate.

In a further variant of this embodiment, a faulty operation can be recognizable on the basis of the operating state. For example, a deviation of the current characteristic can indicate a faulty movement behavior and / or a maximum possible compression of the soil contacted with the ground contact plate.

Achieving a maximum possible compression of the soil contact plate soil or reaching the compaction limit of the soil can be communicated to the operator, for example by an optical or acoustic signal. The operator can then shut down or move the implement, resulting in efficient operation. At the same time wear of the implement is prevented by impact on the already maximum compacted soil. A faulty movement behavior can occur, for example, when selecting a wrong operating program with regard to the substrate to be processed. Likewise, a faulty movement behavior can be caused by a malfunction of the drive device, for example a loosening or misalignment of the imbalance masses. Furthermore, a faulty movement behavior can also be caused by a faulty operation of the working device by the operator, which leads to a jacking or jumping of the working device.

Countermeasures can be initiated on the basis of the recognition of the operating state. For example, an error message can be issued and visually and / or made acoustically perceptible. Also, the working operation of the working device can be interrupted to avoid further damage, for example by interrupting the drive device. In a further embodiment, the lighting device can be retrofitted.

For example, it is possible to provide the lighting device structurally integrated with the power generating device and the lighting device in such a manner that it can be fastened to the guide device, the upper mass or the lower mass and operated there independently, that is to say without further electrical or mechanical connection to the working device can be . In this embodiment, the lighting device can be made in one piece and firmly connected to the implement. Alternatively, the lighting device can be detachably fixable to the working device, for example by inserting it into a suitable insertion device.

In a multi-part design of the lighting device, it is possible, the individual parts, eg. As the power generating device and the lighting device to install depending on space and space at appropriate locations in an existing work equipment.

These and further features of the invention are explained in more detail below by means of examples with the aid of the accompanying figures. Show it:

Fig. 1 a rammer with a arranged on the upper mass, one-piece

Lighting apparatus;

2 shows a stamper with a lighting device attached to the upper mass and a linear generator, which is arranged on a dirt scraper of the upper mass or on a shaft of the padfoot;

3 shows a rammer with a lighting device attached to the upper mass and a rotary generator which is arranged between the upper mass and the guide device on a vibration decoupling device; and 4 shows a rammer with a light device fixed to the upper mass and with a turbine arranged in a combustion air duct. The reference numerals used in the following figures refer to the same or similar elements or devices with, for example, corresponding or similar functionality. The operation of these elements or devices is described only once and can be transferred to the other figures accordingly.

Fig. 1 shows a schematic side view of a rammer with the components of a guide device 1, an upper mass 2 and a lower mass 3. On the lower mass 3, a ground contact plate 4 is provided for pounding and compaction of the soil. The guide device 1 has a guide frame 5 with an operator handle 6 for guiding the rammer through an operator. Furthermore, a drive device in the form of an internal combustion engine 7 with a tank 8 and an air filter 9 for sucking combustion air is provided on the guide device 1. The guide device 1 is connected via a guide bracket 10 and a rubber buffer 1 1 rotatably and vibration-decoupled connected to the upper mass 2. The upper mass 2 furthermore has a guide tube 12, at the lower end of which a dirt wiper 13 forms an inlet for a shaft 14 of the ground contact plate 4.

Furthermore, a lighting device 15 with a lamp 16 for illuminating the soil is provided on the rammer. The lamp 16 is operated by a power generating device having a coil 17 and a magnet 18. The magnet 18 is arranged in the direction of a ramming movement, that is to say substantially vertically, freely movable in the interior of the coil in a cavity. For cushioning a stop of the magnet 18 in a working operation springs 19a, 19b are arranged in the cavity.

In a working operation, the lower mass 3 is offset with the ground contact plate 4 in a pounding relative movement to the upper mass 2 and the guide device 1, for example by a driven by the engine 7 crank mechanism (not shown). This also causes the upper mass 2 in an oscillating up and down movement, you rch the magnet 18 in the interior of the coil 1 7 and is shaken down. As a result, a current is induced in the coil 1 7, through which the lamp 16 can be operated. Consequently, in the embodiment shown in FIG. 1, the lighting device 15 can be operated solely by the working movement of the rammer, whereby during operation the soil can be effectively illuminated without additional energy consumption. This can be achieved inexpensively without further energy supply, for example from a public power grid, from an alternator of the internal combustion engine 7 or from batteries, batteries or other power stores, and without a corresponding wiring.

By arranging the lighting device 15 on a front side of the working device, shadow throws of the trench walls and glare of the operator can be completely avoided. Both occupational safety and work results can be significantly improved. Furthermore, the lighting represents a gain in comfort for the operator. In addition, the lighting device 1 5 operates essentially maintenance-free, since it does not have to be recharged, for example, by connection to external energy sources.

The lighting device 15 is in this embodiment in one piece and may be fixed or removable on the upper mass 2 can be arranged. It can be easily retrofitted and mounted.

FIG. 2 schematically shows a tamper with a lighting device 15 which is likewise arranged on the upper mass 2 and additionally has an electrical energy store 20. The electrical energy store 20 is electrically coupled to the coil 1 7 arranged in the dirt wiper 13 in this embodiment. The magnet 18 is fixedly connected to the shaft 14 of the ground contact plate 4 in this embodiment and is moved by the pounding movement of the ground contact plate 4 in the working operation of the rammer in the coil 1 7 back and forth. As a result, a current in the coil 1 7 is induced in a known manner, which is passed to the electrical energy storage 20 and stored there. The lamp 1 6 can be fed from the electrical energy storage 20 in this embodiment and therefore switched on and off when needed and substantially independent of a working operation of the rammer.

In this embodiment, it is possible, for example, to detect an operating state of the rammer from a time profile of the current flow in the coil 1 and, for example, to automatically switch on the lamp 16 during operation of the rammer. Furthermore, based on the analysis of the current profile, a faulty operating state can also be detected, for example with a faulty working movement of the rammer, and reported to the operator, for example by an optical or acoustic signal. It is also possible to interrupt the work operation of the rammer on this basis in order to avoid further damage. For example, it can be seen that the soil under the ground contact plate 4 of the rammer is already maximally compressed. If this signaled to the operator, this can move the rammer or possibly switch off. This helps to efficiently compact the soil and prevents excessive wear on the equipment. Furthermore, it can be recognized if the rammer has a faulty movement behavior, for example, in case of faulty guidance, a defect in the rammer or an application on an unsuitable surface. This also makes it possible to avoid wear or damage.

In addition, it is possible to supply from the electrical energy store 20 also further electronic operating elements, for example an electronic fill level indicator of the tank 8 or the like. This extension of the operating possibilities of the rammer can be achieved without additional energy requirement and without providing a connection to an external energy source.

The rammer shown in Fig. 3 has a rotary generator 2 1, which is arranged on a rotatable coupling of the guide bracket 10 with the upper mass 2 in the region of the rubber buffer 1 1. The rotary generator 21 may, for example, have a multi-pole rotor which can be arranged non-rotatably on the guide bracket 10 and movable by the guide bracket 10 relative to a coil system of the rotary generator 2 1, wherein the coil system can be arranged, for example, non-rotatably on the upper mass 2. The rotary generator 2 1 can also be designed as a conventional dynamo.

In a working operation of the rammer allows the rotatable coupling of Füh approximately bracket 10 with the upper mass a relative movement between the guide bracket 10 and the upper mass 2 at an angle of for example 5 ° to 30 °. Due to the resulting rotary motion, current can be generated in the rotary generator 2 1, which can be supplied to the electrical energy store 20 and from there the lamp 16 of the lighting device 15 can be made available. 4, a further embodiment is shown, in which a turbine 22 is arranged in a combustion air duct 23 through which combustion air is sucked. Due to the intake of combustion air, the turbine 22 is set in a rotational movement. The rotational movement is transmitted to the rotary generator 21, whereby power can be generated and supplied to the electrical energy storage 20.

In this embodiment as well, the charging of the electrical energy store 20 takes place independently of an external energy source or of a light machine of the internal combustion engine 7. Consequently, the lighting device 15 can be operated cost-effectively.

Claims

claims

1 . Working device for soil compaction with

an upper mass (2);

a lower mass (3) movable relative to the upper mass (2) and coupled to the upper mass (2) via a spring device, having a bottom contact plate (4);

a drive device (7) for generating a relative movement between the upper mass (2) and the lower mass (3); and

a lighting device (15) having a power generating device (1 7, 18) and a lighting device (16) electrically coupled to the power generating device (17, 18).

2. Tool according to claim 1, wherein

the power generating device (1 7, 18) is not electrically coupled to the drive device (7) and / or

the power generating device (1 7, 18) is not coupled to a drive shaft of the drive device (7).

3. Tool according to claim 1 or 2, wherein

the power generating device (1 7, 18) comprises a photovoltaic device for converting light energy into electrical energy.

4. Tool according to one of the preceding claims, wherein

the power generating device (1 7, 18) has a turbine (24) arranged rotatably in a cooling air flow, in a combustion air flow and / or in an exhaust gas flow.

5. Tool according to one of the preceding claims, wherein

the power generating device (1 7, 18) has a generator with a coil device (17) having at least one coil and a magnetic device (18) having magnetically active material, wherein the coil device (1 7) and the magnetic device (18) are movable relative to one another , and wherein by moving the magnetic means (18) relative to the coil means (1 7), a current in the coil means (1 7) can be generated; and in a working operation by a working movement of a component, the magnetic device (18) relative to the coil means (1 7) is movable, wherein the component is selected from a group consisting of the upper mass (2), the lower mass (3) and one with the upper mass (2) and / or the lower mass

(3) coupled guide device (1).

6. Tool according to one of the preceding claims, wherein

the coil device (1 7) is arranged on the component, and the magnetic device (18) is arranged in a cavity substantially freely movable in the direction of the working movement of the component.

7. Tool according to one of the preceding claims, wherein

the coil device (1 7) is arranged on the component, and the magnet device (18) is arranged on a component selected from the group other than the coil device (1 7).

8. Tool according to one of the preceding claims, wherein

the generator is a rotary generator (2 1) which is operable by a relative rotational movement of the guide device (1) to the upper mass (2).

9. Tool according to one of the preceding claims, wherein

the coil device (17) is arranged on a guide tube (13) of the upper mass (2) for guiding a shaft device (14) of the lower mass (3) and the magnet device (18) on the shaft device (14).

10. Tool according to one of the preceding claims, wherein

the drive has an internal combustion engine (7) with an ignition device,

the ignition device has a starting magnet which can be moved by a crankshaft of the drive for generating an ignition voltage of the internal combustion engine (7), and

the power generating device has a coil inductively energized by a movement of the starting magnet.

1 1. Implement according to one of the preceding claims, wherein

the lighting device (15) has an electrical energy store (20) for storing an energy generated by the power generating device (17, 18) and for outputting the stored energy to the lighting device (16).

12. Tool according to one of the preceding claims, with an evaluation device for detecting an operating state by evaluating a time course of a current generated by the power generating device (1 7, 1 8), wherein

the lighting device (1 6) is switched on and / or off depending on the operating state and / or a color or flash frequency of a light emitted by the lighting device in dependence on the Betriebszu is determinable.

13. Tool according to one of the preceding claims, wherein

- Based on the operating state of a faulty operation and / or reaching a maximum possible compression of a soil contact plate (4) acted upon soil is recognizable.

1 . Implement according to one of the preceding claims, wherein

- The lighting device (15) can be retrofitted.