EP3501744B1 - Tool for fitting/removing a chisel to/from a chisel holder system of a milling machine - Google Patents

Description

The invention relates to a tool according to the preamble of claim 1, for the assembly of a chisel on and / or the disassembly of a chisel from a chisel holder system of a milling machine, in particular a road milling machine, with at least one trigger, with which an assembly and / or disassembly of a Chisel is raised.

Such a tool goes, for example, from the EP 1 852 760 A1 emerged.

The invention also relates to a chisel holder system for a milling machine, in particular a road milling machine, with at least one chisel receptacle for the detachable fastening of at least one chisel to a milling drum of the milling machine. Such a bit holder system goes, for example, from EP 3 115 507 A1 emerged.

The invention also relates to a method for monitoring the wear of chisels and / or of exchangeable chisel holders on chisel holder systems of a milling drum of a milling machine, in particular of a road milling machine, the chisels being dismantled from the chisel holder systems with the aid of a tool and / or the chisels with Help of Tool are mounted on the chisel holder systems and the wear behavior of the chisel and / or the exchangeable chisel holder is determined on the basis of the number of exchanged chisels and / or the number of exchanged exchangeable chisel holders.

For the removal of soil material, for example for the renewal of roads or in open pit mining, soil cultivation machines are used, which mill the subsoil. For this purpose, the soil cultivation machines each have a rotating milling drum, on the surface of which chisels are arranged. As wearing parts, the chisels are interchangeably connected to a milling drum tube of the milling drum. For this purpose, it is known to attach bit holder systems to the milling drum tube, by which the chisels are detachably held. The bit holder systems each have a bit holder to hold the bit. These can be connected directly to the milling drum tube, for example welded to it. It is also known to attach a base holder to the roller tube and to hold the chisel holder detachably thereon. With such a chisel holder system having a base holder and a chisel holder, a worn chisel can be removed from the chisel holder and a worn chisel holder from the base holder and replaced.

Separate tools are known for removing the chisel from the bit holders. One such tool is in the DE 10 2008 025 071 A1 described. An actuator of the tool, which has an expulsion mandrel at its free end, is adjustably held on a base part of the tool. The actuator is directly or indirectly coupled to a cylinder-piston system or to an electromotive unit. After actuation of a trigger, this / this presses the front end of the expulsion mandrel against a support surface which forms the end of a chisel shaft held in the chisel receptacle of the chisel holder. The chisel can be designed as a round shank chisel, the chisel shank being held in the chisel receptacle by means of a clamping sleeve so that it can rotate about its longitudinal axis, but is axially blocked. The chisel is pressed out of the chisel holder by the pressure of the expulsion mandrel on the end of the chisel shaft. The tool is with its base part on the Chisel holder or on a wear protection disk arranged between a chisel head and a shoulder of the chisel holder.

The DE 10 2007 030 640 B3 discloses a tool for assembling and disassembling a chisel from a chisel holder. The tool has an actuator which can be adjusted in two opposite directions by means of an adjusting unit which can be force-actuated bidirectionally. A push-off section is assigned to the actuator and a pull-in section at a distance from it. The actuating unit can be inserted into a bulge on a base part of a chisel holder system by which a chisel holder is held. It is also possible that the base part and the chisel holder are combined in one piece as a structural unit. The actuator rests with the push-off section in the extension direction on a cylindrical support part which forms the end of a chisel shank of a round shank chisel facing away from the chisel head. The pull-in section comprises the cylindrical support part and thereby engages in a groove formed between the cylindrical support part and the chisel shank. A force can thus be transmitted to the chisel in the ejection direction by means of the push-off section, while a force can be introduced in the pull-in direction of the chisel through the engagement of the pull-in section in the groove. The actuator is operated hydraulically. To do this, it is coupled to a battery-operated hydraulic unit. The actuating unit and the actuator connected to it can be adjusted by means of appropriate control, and a chisel can thus be ejected or drawn into the chisel receptacle of the chisel holder.

From scripture US 2015/0300165 A1 a milling drum is known whose releasably attached milling tools (chisels) are each equipped with a transponder (RFID). The transponders contain data that enable the individual milling tools to be clearly identified. A reader is assigned to the milling machine, which reads the information stored in the transponder and forwards it to a computer. This compares the received data with those stored in a memory. If there is a discrepancy between the data, it is assumed that a respective milling tool has been lost. A milling machine can determine the number of milling tools available at any time.

The US 2017/0011564 A1 describes a monitoring system for bits of a milling drum. At least one transmitter, for example in the form of an RFID transmitter, is assigned to each chisel. The transmitter is in radio communication with a receiver arranged on the milling machine and via this with an evaluation system. If there is no signal from a transmitter, the evaluation system detects the loss or impermissible wear of a chisel. To detect wear, the at least one transmitter is arranged within the chisel or the chisel head. As the chisel wears out, the transmitter is exposed and destroyed.

From the DE 10 2016 113 251 A1 a milling machine, a milling drum for such a milling machine and a method for operating the milling machine are known. A means for determining a characteristic feature of the milling drum is assigned to the milling machine. Using this characteristic feature, a value to be set and / or a setting range for at least one machine parameter of the milling machine is specified. Using the characteristic feature, for example, the type of milling drum and thus the milling task can be determined. A characteristic feature can be given, for example, by marking the milling drum. Such an identification can be stored in an active or passive transponder. The identification or the transponder can be arranged in or on a milling drum tube, a tool holder or a milling tool.

The object of the invention is to create a tool for the assembly and / or disassembly of a chisel on a chisel holder system of a milling drum, which tool offers a user improved information for determining wear.

It is a further object of the invention to provide a corresponding bit holder system.

Date: December 4, 2018 It is also an object of the invention to provide a method with which the wear behavior of chisels and chisel holders of a milling machine can be determined simply and reliably.

The object of the invention relating to the tool is achieved by a tool according to patent claim 1. The tool has a detection device with at least one counting device, and the detection device is designed to detect a number of chisels dismantled with the tool and / or a number of chisels mounted with the tool. The machine operator and / or the maintenance staff of the milling machine thus know immediately how many chisels have been changed on a milling drum. Errors in determining the number of replaced chisels, as can occur when the maintenance personnel simply count, are thus reliably avoided. On the basis of the number of dismantled and / or mounted chisels, the machine operator can draw conclusions about the wear behavior of the chisels during the milling task carried out. This enables a forecast of the future wear behavior if the milling task is continued. From this forecast, for example, the need for chisels until the end of the milling task or a suitable duration for the maintenance intervals can be derived. The numbers for the replaced chisels can be used to manage the spare parts store and the chisels delivered to a construction site and kept on hand at the construction site. Conclusions can be drawn about the material properties of the milled substrate on the basis of the required chisel changes. Thereupon, for example, the machine parameters can be adapted in such a way that the greatest possible milling performance is achieved with as little wear as possible. This measure enables cost-effective operation of the milling machine. Taking into account the recorded number of changed chisels, the efficiency of the machine use and the costs for using the machine for a completed milling job can be determined. The detection device is advantageously arranged on the tool with which the chisels are installed or removed. This is advantageous compared to known detection devices arranged on the milling machine in the immediate vicinity of the milling drum, since the detection device does not withstand the high mechanical loads is suspended during the milling process. The chisels are held by bit holder systems, which are mounted on a milling drum tube of the milling machine. For this purpose, a respective chisel holder system has a corresponding chisel holder which, for example, comprises a chisel receptacle for receiving and releasably securing a chisel shaft. The tool is designed to insert the chisel with its chisel shank into the chisel receptacle of the chisel holder and / or to drive it out of it. The chisel holder can be fixed directly to the milling drum tube. It then forms the chisel holder system. It can also be provided that an exchangeable chisel holder is detachably held by a base support, the base support being firmly connected to the milling drum tube, for example via a welded connection. The chisel holder system is then formed by the exchangeable chisel holder and the base carrier.

A simple and reliable detection of the installed and / or removed chisels can take place in that the detection device is designed to increase a counter reading of the counting device for the number of dismantled chisels or for the number of mounted chisels by one when the at least one trigger is actuated increase. The actuation of the trigger represents a clear signal which is easy to detect and which can be clearly assigned to an installed and / or removed chisel.

According to the invention it is provided that the detection device is designed to read out at least one identifier arranged on the chisel holder system on which the tool is attached when the at least one trigger is actuated and / or that the detection device is designed to read out at least one identifier when the at least one trigger is actuated Trigger at least one identifier which is arranged on the chisel held by the chisel holder system on which the tool is attached to read out. The identifier enables a clear identification of a respective bit holder system or a chisel. The identifier can contain further data, for example a bit type, a material number of the bit or the bit holder system and / or an installation date or an installation time of the bit or the bit holder system.

As an alternative to increasing the counter when the trigger is actuated, the counter can also be increased when an identifier is detected. These alternatives should also apply to all of the following exemplary embodiments.

According to a possible variant of the invention, it can be provided that the detection device is designed to read a data carrier arranged as an identifier on the chisel holder system, in particular an electronic data carrier. An electronic data carrier enables almost any data to be stored. This data can contain information that enables a clear identification of a respective bit holder system and thus a bit. Instead of the electronic data carrier, it is also conceivable to provide a different form of identifier, for example in the form of an optically readable data carrier. An optically readable data carrier can be a barcode, for example. Such a barcode can be arranged inexpensively on the bit holder system. In principle, any form of machine-readable identification is suitable as an identifier for the toolholder system.

If it is provided that the detection device is designed to read out the identifier in a contactless manner, no mechanical or electrical connection between the tool and the identifier is required to transfer the data from the identifier to the detection device. The tool can thus be designed according to known tools and only expanded by the detection device. Retrofitting existing tools with the acquisition device is also conceivable.

According to a particularly preferred embodiment of the invention, it can be provided that the detection device is designed to detect a position of the chisel holder system on which the tool is attached on a milling drum when the at least one trigger is actuated. The position of the bit holder system can, for example, be stored in the identifier and read out accordingly. The position of the bit holder system can be a coordinate running in the axial direction of the milling drum and / or a coordinate Coordinates running in the circumferential direction of the milling drum, for example in the form of an angle specification. The coordinate running in the circumferential direction can, for example, be related to a previously established zero line. The zero line then corresponds, for example, to a line running on the circumference of the milling drum tube in the direction of its axis of rotation. It is also conceivable to assign a unique position number to each possible assembly position of the bit holder system, which enables the position of a respective bit holder system to be clearly identified on the milling drum.

It can advantageously be provided that the detection device has an RFID reader. An RFID transponder is then assigned to each bit holder system as an identifier. RFID transponders are available inexpensively in large numbers. In them, data can be saved, which enable a clear identification of a bit holder system. Data can also be stored in them, which identify the position of the respective bit holder system on the milling drum. The RFID transponders can be designed as active or passive RFID transponders. Passive RFID transponders have the advantage that they do not need their own power supply. The RFID reader enables the data from the RFID transponder to be read out contactlessly, i.e. without making electrical or mechanical contact. This leads to a simple and inexpensive construction of the tool.

A quick and easy dismantling and / or assembly of the chisels can be achieved in that the tool has a base part on which an actuator with a push-off section and / or with a retraction section is movably mounted and that the actuator is coupled directly or indirectly to an actuator is. The actuator can be formed, for example, by a cylinder-piston system or by an electromotive unit. The push-off section can be designed in the form of an expulsion mandrel. The push-off section enables a chisel to be driven out of a chisel holder. With the aid of the pull-in section, a chisel can be pulled with its chisel shaft into a chisel receptacle of the chisel holder. The base part enables the tool to be fixed to the Chisel holder system. The actuator is triggered by actuating the at least one trigger. At the same time, by actuating the at least one trigger, the counter reading of the counting device for the dismantled and / or mounted chisels is increased. For example, if the tool is designed for both mounting and dismounting chisels, two triggers can be provided, one triggers an assembly movement and the second a disassembly movement of the actuator. Depending on which trigger was actuated, the counter reading of the counting device is then increased for a mounted or dismantled chisel. It is conceivable to provide two counting devices, one of which counts the mounted chisels and one counts the dismantled chisels. In this way it can be recognized, for example, whether all driven chisels were replaced with new ones when the chisel was changed. It is also conceivable to use only one trigger, the function of which can be switched between triggering assembly and disassembly, or alternately triggers assembly and disassembly. When the trigger is actuated, the counter reading for dismantled or mounted chisels is increased depending on the selected function.

It can be particularly advantageously provided that at least a part of the detection device, in particular the RFID reader, is arranged on or in the actuator or on or in the base part of the tool. The section of the detection device responsible for the detection of the identifier, for example the RFID reader, can thus be brought into the immediate vicinity of an identifier arranged on the chisel holder system, in particular an RFID transponder arranged on the chisel holder system, during the assembly or disassembly of a chisel. This enables a trouble-free exchange of data between the RFID transponder and the RFID reader. The data read out by the RFID transponder enable, for example, the previously described determination of the position of the bit holder system on the milling drum. A bit change can be assigned to a specific bit holder system and a position on the milling drum.

In order to avoid that an incorrect actuation of the at least one trigger, during which no disassembly and / or assembly of a chisel takes place, leads to a change in the specific number of disassembled and / or assembled chisels, it can be provided that the detection device is designed for this purpose to detect an actuation of the at least one trigger without an assembly or disassembly of a chisel that has taken place and then not to change the number of detected mounted and / or dismantled chisels and / or that the detection device is designed to respond to repeated actuation of the at least one Trigger within a specified period of time not to change the number of detected mounted and / or dismantled chisels and / or that the detection device is designed to read the number of detected mounted and / or dismantled chisels when the same identifier is repeated within a predetermined second period of time el not to be changed and / or that the detection device is designed not to change the number of detected mounted and / or dismantled chisels when the at least one trigger is actuated and an identifier is not read out. If, for example, two successive triggering processes take place within a predetermined period of time that is selected to be so short that it is not possible to dismantle and / or assemble two chisels within the period, the counter reading is not changed accordingly. If a triggering process is carried out repeatedly on the same bit holder system in succession, this can be recognized on the basis of the same identifier that has been read out one after the other. Correspondingly, the counter reading of the dismantled and / or mounted chisels is not changed in this case either. If no identifier is read out when the tool is triggered, it can be assumed that the tool is not attached to any chisel holder system and therefore no chisel has been dismantled or mounted. Even then, there is no change in the count of the counting unit. It is also conceivable that the tool is designed to detect the force applied by the tool. The detection device can then be designed to use the information on the force applied to infer whether a chisel has been assembled or disassembled.

The bit holder system can be designed in two parts, namely from a base part connected to the milling drum and an exchangeable bit holder held therein. If it is provided that the detection device is designed to read out an identifier arranged on a base carrier of the bit holder system and / or an identifier arranged on an exchangeable chisel holder assigned to the base carrier, an assignment of an exchangeable chisel holder to a base carrier can be made by the detection device or from a control unit, to which the acquisition device transmits, acquires and checks the data. If an identifier of a chisel holder and a base carrier is detected, for example for a base carrier, a different chisel holder than is stored for him in the detection device or in the control unit, it can be concluded that the chisel holder has been changed. The tool thus also enables the detection and recording of changed bit holders.

In order to recognize a replaced bit holder, it can also be provided that the detection device is designed to read the at least one identifier arranged on a bit holder system when the at least one trigger is actuated and to detect the position of the bit holder system on the milling drum and that the detection device is designed to do so is, by comparing the data read out from the identifier with data stored in the detection device for the position on the milling drum, a changed, exchangeable chisel holder can be recognized at this position. The identifier is preferably arranged on the exchangeable chisel holder of the chisel holder system.

It can advantageously be provided that the detection device has a memory and that the data read from the identifiers and / or the times at which the respective identifiers were read can be stored in the memory and / or that the stored data and / or times are assigned to a count of the counting device. In this way, the data can be saved together with the meter reading and transmitted to a higher-level control unit. The transmission can take place, for example, after all worn chisels of a milling drum have been replaced.

A preferred embodiment variant of the invention provides that the tool has a wired interface or a radio interface for the electronic transmission of data. The interface is connected to the detection device or is part of the detection device. Via the interface, data can be transmitted from the acquisition device to a control unit and vice versa from a control unit to the acquisition device. It is thus possible to transfer the number of dismantled and / or mounted chisels recorded by the tool to the control unit. This can be arranged in the milling machine, for example. The control unit can then show the machine operator the number of dismantled or assembled chisels via a display. The tool does not need to have its own display to show the number of chisels that have been replaced. Further data transmitted from the identifiers to the tool, for example position data, or data derived therefrom, can also be transmitted via the interface to the control unit and evaluated or displayed by the latter.

In order to also be able to transmit data to the identifiers arranged on the bit holder systems, it can be provided that the tool and / or the detection device has a data interface and that the data interface is designed to transmit data to the data carrier arranged on the bit holder system as an identifier. In this way, it is possible, for example, to transfer the installation time of a chisel to the chisel holder system. This can then be read out again when the chisel is dismantled and used to determine the service life of the chisel. Before the identifiers are used for the first time, the data necessary for identifying the respectively assigned bit holder system can also be transferred from the tool to the identifiers. No further devices are therefore required that enable the identifiers to be written.

The object of the invention relating to the bit holder system is achieved by a bit holder system according to patent claim 15. As a result, at least one electronic data carrier that can be read out contactlessly is arranged as an identifier in the chisel holder system, and the data carrier contains information for identifying the chisel holder system and / or about the position of the bit holder system on the milling drum. By reading out the data carriers of the bit holder systems arranged on a milling drum, these can each be clearly identified and / or it is possible to determine the position of a respective bit holder system on the milling drum. As a result, when a bit is changed, the changed bit can be assigned to a specific bit holder system and / or a position on the milling drum. In this way it can be determined, for example, how often a chisel has been changed on a specific chisel holder system. In relation to a performed milling performance of the milling drum, conclusions can be drawn from the data obtained about the wear behavior of the chisels at their respective installation location on the milling drum. From the wear behavior, forecasts can be made for the future demand for chisels when the milling task is continued. Conclusions can be drawn about the material properties of the voracious subsoil. This information makes it possible, for example, to optimize the machine parameters of the milling machine in such a way that the highest possible milling performance is achieved with the least possible wear of the chisel. This can reduce the efficiency of machine use and the costs for machine use. The data carriers are advantageously not arranged in or on the chisels, but in or on the chisel holder systems. A data carrier is therefore not exchanged when a chisel change is required, but can be used in accordance with the service life of the chisel holder system. As a result, the number of data carriers required for monitoring the replacement and wear of chisels can be significantly reduced compared to known systems in which the data carriers are arranged in or on the chisels.

A long life expectancy of the data carriers can be achieved in that the data carrier is arranged in an area of the chisel holder system protected from abrasion.

According to a particularly preferred variant of the invention, it can be provided that the data carrier is an active or passive RFID transponder. RFID transponders are becoming inexpensive in large numbers offered. Data can be stored in them, which enable a clear identification of a bit holder system or its position on a milling drum. RFID transponders can also be provided, which make it possible to change the stored data later. Passive RFID transponders also have the advantage that they do not need their own power supply.

It can advantageously be provided that the data carrier contains information about the installation time of a chisel held in the bit holder system. When removing a chisel that has reached the wear limit, the service life of the chisel under the previous operating conditions of the milling drum and the milling machine can thus be determined.

It can be provided that the chisel holder system has a chisel holder firmly connected to the milling drum and that the at least one data carrier is arranged on or in the chisel holder or that the chisel holder system has a base carrier firmly connected to the milling drum and an exchangeable chisel holder detachably connected to the base carrier and that at least one data carrier is arranged on or in the base carrier and / or on or in the exchangeable chisel holder. With a chisel holder firmly connected to the milling drum, for example by a welded connection, the position data of the chisel holder system can be clearly assigned to the chisel holder and stored in the data carrier arranged on or in the chisel holder. With a two-part chisel holder system, to which a base carrier and an interchangeably connected chisel holder are assigned, the position data on the milling drum can be clearly assigned to the base carrier permanently connected to the milling drum and thus stored in a data carrier arranged on the base carrier. An exchangeable chisel holder can initially be mounted on any basic carrier. If both the exchangeable chisel holder and the base carrier in which the chisel holder is held have a data carrier, a clear association between a base carrier and an exchangeable chisel holder mounted on it can be made on the basis of the stored data. This assignment is therefore the position of the replaceable bit holder on the milling drum is also clearly determined. When the chisel holder is replaced, for example due to advanced wear, a new chisel holder with a new identifier is assigned to the base carrier. This is recognized when reading out the data carriers arranged on the base carrier and the exchangeable chisel holder. In this way, the replacement of a bit holder can be detected and recorded. Based on the number of exchanged bit holders determined in this way, conclusions can be drawn about their service life under the previous operating conditions of the milling drum and milling machine. This enables a forecast of the future demand for bit holders to continue the milling task.

The object of the invention relating to the method is achieved by a method according to patent claim 20. The number of chisels mounted and / or dismantled with the tool is detected by a detection device arranged on the tool and / or the position of a chisel mounted and / or dismantled with the tool is detected by the detection device arranged on the tool and / or the position and a unique identification of a chisel holder system on which a chisel is dismantled or mounted is detected by the detection device. The number of chisels mounted and / or dismantled can be used to directly deduce the number of chisels replaced and thus their wear behavior. Further parameters, for example a period of use of the chisel, can also be taken into account. It is also possible to take into account the machine parameters provided for the milling work carried out with which the milling machine was operated, or the milled material. If the position of the chisel or the chisel holder on the milling drum is also recorded, then spatially resolved wear monitoring can take place. This can be used to evaluate, for example, whether there is increased wear in certain areas of the milling drum. A change in an exchangeable bit holder can be inferred if a bit holder system with a different identification is detected during successive bit changes at one position of the milling drum.

A simple and reliable determination of the position of an exchanged chisel or an exchanged exchangeable chisel holder on the milling drum can take place in that the position of a dismantled and / or mounted chisel and / or the position of an exchangeable chisel holder on which a chisel is dismantled and / or mounted is detected by reading out an identifier arranged on the bit holder system. The detection unit arranged on the tool preferably has means with which the identifier can be read out automatically.

Fig. 1

in einer perspektivischen Seitenansicht eine Fräswalze mit daran befestigten Meißelhaltern,

Fig. 2

in einer schematischen seitlichen Schnittdarstellung ein einteiliges Meißelhaltersystem mit einem eingesetzten Meißel,

Fig. 3

in einer seitlichen Schnittdarstellung das in Fig. 2 gezeigte, einteilige Meißelhaltersystem mit einem angesetzten ersten Werkzeug,

Fig. 4

in einer perspektivischen Explosionsdarstellung ein zweiteilig ausgebildetes Meißelhaltersystem,

Fig. 5

in einer Seitenansicht und im Teilschnitt das in Fig. 4 gezeigte, zweiteilige Meißelhaltersystem mit einem angesetzten zweiten Werkzeug und

Fig. 6

in perspektivischer Darstellung einen Adapter des in Fig. 5 gezeigten, zweiten Werkzeugs.

The invention is explained in more detail below with reference to an embodiment shown in the drawings. Show it:

Fig. 1

in a perspective side view a milling drum with attached bit holders,

Fig. 2

a one-piece chisel holder system with an inserted chisel in a schematic lateral sectional view,

Fig. 3

in a lateral sectional view the in Fig. 2 shown, one-piece chisel holder system with an attached first tool,

Fig. 4

a two-part chisel holder system in a perspective exploded view,

Fig. 5

in a side view and in partial section the in Fig. 4 shown, two-part chisel holder system with an attached second tool and

Fig. 6

an adapter of the in Fig. 5 second tool shown.

Fig. 1 shows a perspective side view of a milling drum 80 of a milling machine (not shown) with bit holders 30 attached. The bit holders 30 are attached to the outer circumference of a milling drum tube 81 of the milling drum 80. They each form a bit holder system 1. In the exemplary embodiment shown, the bit holders 30 are connected directly to the milling drum tube 81. For this purpose, the bit holders 30 are welded to the milling drum tube 81. Chisels 70 are held in the chisel holders 30. The chisels 70 are in the present case designed as round shank chisels. They are each with one in the Fig. 3 and 5 Chisel shaft 71 shown rotatable about its longitudinal axis, but axially blocked, held in the chisel holders 30.

Depending on the milling task to be carried out, different milling drums 80 with different arrangements of the chisel holders 30 and with chisels 70 adapted to the respective milling task are used.

The chisels 70 are subject to severe wear. They must therefore be replaced regularly. Their service life depends on the material properties of the processed subsurface and on the machine parameters with which the milling machine and thus the milling drum 80 are operated.

To replace the chisels 70, they can be released from the chisel holders 30 and new chisels 70 can be inserted into the chisel holders 30. For this purpose, special tools 10, 90 are used, such as those shown in FIG Fig. 3 and 5 are shown.

Fig. 2 shows a one-piece chisel holder system 2 with an inserted chisel 70 in a schematic lateral sectional view. The chisel holder 30 is placed with a concave contact section 31 on a roller surface 82 of the milling drum tube 81 and is welded to it. It has a bulge 32 facing away from the milling drum tube 81.

Fig. 3 shows in a sectional side view the in Fig. 2 The one-piece chisel holder system 2 shown with an attached first tool 90. The first tool 90 is inserted with a first base part 91 into the bulge 32 of the chisel holder 30. The first base part 91 forms a cylinder in which a piston 92 is guided. The piston 92 is connected to a first actuator 94 via a first piston rod 93. The first actuator 94 forms a hook-shaped pull-in section 95 and a first push-off section 96. A first handle 97 is connected to the first base part 91. The first handle 97 carries a hydraulic unit 98, which via in Fig. 5 for a second tool 10 shown trigger 12.1 can be controlled. The hydraulic unit 98 optionally enables the piston 92 to be pressurized on its opposite surfaces. The first actuator 94 can thus be force-actuated bidirectionally. In the extended position shown, the first actuator 94 is pushed into a first chisel receptacle 33 of the chisel holder 30 up to an outer end thereof.

The chisel 70 has a cylindrical chisel shaft 71, around which a clamping sleeve 75 is arranged. A circumferential pull-in groove 76 is formed in the chisel shaft 71 in its free end region. At the end, the chisel shank 71 forms a cylinder support part 77.

The first actuator 94 rests with its first forcing section 96 on the cylinder support part 77 and thus on the free end of the chisel shaft 71. It engages with its pull-in section 95 in the pull-in groove 76. By applying pressure to the piston 92 accordingly, the first actuator 94 is adjusted towards the first base part 91 and thus into the first chisel receptacle 33. As a result of the engagement of the pull-in section 95 in the pull-in groove 76, the chisel shank 71 is pulled into the first chisel receptacle 33 and held there by the clamping sleeve 75. The chisel 70 is thus mounted on the chisel holder 30 and the first tool 90 can be removed from the bulge 32. To dismantle the chisel 70, the first tool 90 is reinserted with its first base part 91 into the bulge 32 and the first actuator 94 is pushed into the first chisel receptacle 33 by applying pressure to the piston 92. The first actuator 94 presses with its first Forcing section 96 against the cylinder support part 77 of the chisel shaft 71, whereby the chisel 70 is driven out.

A detection device 110 is arranged on the first tool 90. The detection device 110 is symbolically represented by a rectangle. The detection device 110 is assigned two counting devices 113, such as one shown schematically in FIG Fig. 6 is shown. The detection device 110 is designed to detect a number of chisels 70 dismantled with the first tool 90 and a number of chisels 70 assembled with the first tool 90. For this purpose, the counter reading of the first for each dismantled chisel 70 and the counter reading of the second counter 113 for each installed chisel 70. The first tool 90 is assigned two triggers 12.1 outside the selected image detail and thus not shown, one of which triggers an assembly movement and one triggers a dismantling movement of the first actuator 94. The counter reading of the counter 113, which counts the dismantled chisels 70, is increased when the trigger 12.1, which triggers the dismantling movement, is actuated. Correspondingly, the count of the counter 113, which counts the mounted chisels, is increased when the trigger 12.1, which triggers the assembly movement, is actuated. On the basis of the number of exchanged chisels 70 recorded in this way, the wear behavior of the chisels 70 can be determined for the milling task carried out.

In the exemplary embodiment shown, the detection device 110 is fastened to the first actuator 94 of the first tool 90.

However, it is also conceivable to arrange the detection device 110 on other components of the first tool 90, for example on the first base part 91 or in the first handle 97.

Furthermore, individual assemblies of the detection device 110, as exemplified in FIG Fig. 6 are shown, arranged on various components of the first tool 90 and connected to one another, preferably electrically. It is thus conceivable to arrange the counting devices 113 in the first handle 97. One optional possible readout unit can then advantageously be arranged on the first actuator 94. However, it can also be provided on other components of the first tool 90, for example on the piston rod 93 or on the first base part 91. The readout unit is arranged on the first tool 90, if possible, in such a way that it is close to the identifier when the first tool is attached to the second bit holder system 2. In the present case, the readout unit is designed as an RFID reader 111, as shown schematically in FIG Fig. 6 is shown.

An identifier, which is also optionally possible, is arranged on the one-piece chisel holder system 2 and thus on the chisel holder 30. In the present case, the identifier is designed as a first RFID transponder 100. The first RFID transponder 100 is shown schematically in the representation as a dotted circle. Data of the present one-piece chisel holder system 2 are stored in the identifier. In the case of the first RFID transponder 100 shown as an identifier, the data are stored electronically. However, other forms of identifiers can also be used, for example optically readable identifiers. Such an optically readable identifier can be, for example, a barcode which is arranged on the one-piece chisel holder system 2.

The identifier can be read out with the aid of the read-out unit of the detection device 110, in the present case with an RFID reader. The data contained in the identifier contain information which enables the first bit holder system 2 to be clearly identified. A bit change can be clearly assigned to a specific first bit holder system 2 of the milling drum 80 on the basis of the data read out. In this way it can be determined how many bit changes have been made on a specific first bit holder system 2. From this, conclusions can be drawn about the wear behavior of the chisels 70 on a specific first bit holder system 2. It is provided here that the data stored in the identifier identify a position of the first bit holder system 2 on the milling drum 80. The wear behavior of the chisels 70 can thus be determined spatially resolved via the milling drum 80.

Fig. 4 shows a two-part chisel holder system 3 in a perspective exploded view. A base support 50 and an exchangeable chisel holder 40 are assigned to the two-part chisel holder system 3. The base support 50 can with a lower connection side 51 on an in Fig. 1 Milling drum tube 81 shown are applied and welded to this. The base support 50 is thus fixedly and permanently connected to the milling drum tube 81. The base support 50 has a base body 52 in which a plug-in receptacle 53.2 is formed as an opening. Supporting surfaces 53.1 are arranged on the base body 52 laterally facing the plug-in receptacle 53.2 and the exchangeable chisel holder 40. The support surfaces 53.1 together with the plug-in receptacle 53.2 form a chisel holder receptacle 53. A threaded receptacle 54 is molded into the base body 52 of the base support 50 on the side of the chisel holder receptacle 53. The threaded receptacle 54 forms an opening to the plug receptacle 53.2. A pressure screw 55 can be screwed into the threaded receptacle 54.

The exchangeable chisel holder 40 has a support body 41. A plug-in attachment 44 is formed on the support body 41. In the assembly orientation shown, the plug attachment 44 is oriented in the direction of the plug receptacle 53.2 of the base support 50. It has a pressure screw receptacle 44.1 which is closed off by a pressure surface 44.2 aligned obliquely to the longitudinal extension of the plug-in attachment 44. Opposite to the plug-in attachment 44 and laterally offset from it, a holding section 43 is connected in one piece to the support body 41. The holding section 43 is cylindrical. It has a second chisel receptacle 42 running along its central longitudinal axis. The second chisel receptacle 42 is designed as a bore guided through the holding section 43 and the support body 41. Facing away from the support body 41, the holding section 43 is closed off by a wear surface 43.1. On the outer circumference of the holding section 43, wear markings 43.2 are molded into the surface of the holding section 43 at different distances from the wear surface 43.1.

To attach the exchangeable chisel holder 40 to the base support 50, the plug-in attachment 44 of the chisel holder 40 is pushed into the plug-in receptacle 53.2 of the base support 50 until the support body 41 with correspondingly shaped mating surfaces rests on the support surfaces 53.1 of the base support 50. In this position, the pressure surface 44.2 of the plug-in projection 44 is arranged in alignment with the threaded receptacle 54 of the base support 50. When the pressure screw 55 is screwed into the threaded receptacle 54, the latter presses against the pressure surface 44.2 at the end. The plug-in attachment 44 is thus fixed in the plug-in receptacle 53.2. To dismantle the exchangeable chisel holder 40, the pressure screw 55 is unscrewed, with the result that the plug-in attachment 44 and thus the exchangeable chisel holder 40 are released.

According to the invention, an identifier, in the present case in the form of a second RFID transponder 101, is arranged in or on the exchangeable chisel holder 40. The second RFID transponder 101 is shown schematically by a dashed circle. In the present case, the second RFID transponder 101 is positioned in a recess (not shown) in the support body 41 of the exchangeable chisel holder 40. However, it is conceivable to arrange the second RFID transponder 101 in or on the holding section 43 or in or on the plug-in attachment 44.

A further identifier, in the present case as a third RFID transponder 102, is arranged on the base carrier 50. This is also represented symbolically by a dashed circle. The third RFID transponder 102 is presently arranged in a recess (not shown) in the base body 52 of the base carrier 50. However, it is also conceivable to attach the third RFID transponder 102 to a protected area of the surface of the base carrier 50.

The second and third RFID transponders 101, 102 thus form identifiers of the two-part chisel holder system 3, in this case the exchangeable chisel holder 40 and the base carrier 50. It is conceivable to provide only one identifier, for example on the exchangeable chisel holder 40 or on the base carrier 50. Data can be stored in the identifiers. The data can be read via a corresponding readout unit, in the present case a corresponding RFID reader 111, as shown in FIG Fig. 6 is shown schematically, can be read out.

The ones in the Figs. 3 to 5 The shown RFID transponders 100, 101, 102 represent contactless readable, electronic data carriers. In the present case, they are designed as passive RFID transponders 100, 101, 102. These have the advantage that they do not need their own energy supply. The energy required to read out the stored data is taken from the radio signal of the RFID reader 111.

The in Fig. 4 The identifiers shown (second and third RFID transponders 101, 102) allow a clear identification of the base support 50 and the exchangeable chisel holder 40. By reading out the data, a specific, exchangeable chisel holder 40 can be assigned to a base carrier 50. If an exchangeable chisel holder 40 is exchanged, a new exchangeable chisel holder 40 with a new identifier is assigned to the base carrier 50. This can be recognized by reading out the data from the second and third RFID transponders 101, 102. By reading out the identifiers of the base carrier 50 and the exchangeable chisel holders 40 of a milling drum 80 mounted therein, the number of exchanged chisel holders 40 can thus be determined. In the third RFID transponder 102 assigned to the base carrier 50, data which identify the position of the base carrier 50 on the milling drum 80 are stored. These data can contain a coordinate directed in the circumferential direction of the milling drum 80, for example in the form of an angle specification, and a coordinate extending in the direction of the longitudinal extension of the milling drum 80. It is also conceivable to assign a position number to each possible position of a base carrier 50 on the milling drum 80 and to store this number in the second RFID transponder 101. By reading out the third RFID transponder 102, the position of the assigned base carrier 50 on the milling drum 80 can thus be clearly determined. In this way, changes in the exchangeable chisel holder 40 can be determined in a positionally precise manner. In this way it can be determined, for example, when the exchangeable chisel holder 40 on a base support 50 has been exchanged several times.

At this point it should be pointed out once again that, according to the invention, instead of the shown RFID transponders 100, 101, 102, other identifiers, for example optically readable identifiers, e.g. Barcodes, can be used. The readout unit is then designed to be suitable for reading out the identifiers used.

Fig. 5 shows in a side view and in partial section the in Fig. 4 The two-part chisel holder system 3 shown with an attached second tool 10. The base support 50 is placed with its lower connection side 51 on a milling drum tube 81, not shown, and is welded to it. The plug-in projection 44 of the exchangeable chisel holder 40 is inserted into the associated plug-in receptacle 53.2 of the base support 50 and held therein by the pressure screw 55. A chisel 70 is partially inserted with its chisel shaft 71 into the second chisel receptacle 42 of the exchangeable chisel holder 40. A clamping sleeve 75 is provided around the chisel shaft 71. This presses itself against the wall of the second chisel receptacle 42 and engages in a groove formed circumferentially in the chisel shaft 71. As a result, the chisel 70 is rotatable but axially blocked and held in the second chisel receptacle 42. Opposite to the chisel shaft 71, a chisel tip 72, preferably made of a hard material, is attached to a chisel head of the chisel 70. A wear protection disk 74 is arranged between a chisel head and the holding section 43 of the exchangeable chisel holder 40. The free end of the chisel shaft 71 forms a support surface 73.

The second tool 10 has a second handle 12. The trigger 12.1 is arranged on the second handle 12. Power contacts 11 are led out of the second handle 12 at the end. The second handle 12 is connected to a cylinder 13 opposite the power contacts 11. The cylinder 13 is part of a cylinder-piston system. This forms an actuator for driving a second control element 60. It is conceivable to use other actuators instead of the cylinder-piston system, for example actuators driven by an electric motor. The cylinder-piston system is articulated to the second actuator 60 via a second piston rod 14. At a distance from the coupling point of the second piston rod 14, the second actuator 60 is pivotable on a second base part 21 of an adapter 20 stored. The second base part 21 of the adapter 20 is placed on the exchangeable chisel holder 40 and held in its position by a push-off part 23 which is supported on the wear protection disk 74. The second actuator 60 is designed in the form of a bent lever 61. The free end of the second actuator 60 forms a second forcing section 62 in the form of an expulsion mandrel. This is inserted through a rear access into the second chisel receptacle 42 of the exchangeable chisel holder 40. The second forcing section 62 rests on the support surface 73 of the chisel shaft 71 of the chisel 70. By actuating the trigger 12.1, the piston arranged in the cylinder 13 is extended. This movement is transmitted via the second piston rod 14 to the second actuator 60 so that it pivots about its end-side mounting. In the process, the second push-off section 62 is pressed against the support surface 73 of the chisel, as a result of which the chisel shaft 71 is pressed out of the second chisel receptacle 42, as described, for example, in the text DE 10 2008 025 071 A1 is described.

The third RFID transponder 102 is assigned to the base carrier 50 and the second RFID transponder 101 is assigned to the exchangeable chisel holder 40. Both are shown schematically by a dashed circle and a filled circle. The detection device 110 is arranged on the second actuator 60 in the area of the lever 61, as shown by way of example Fig. 3 is described. This is also shown schematically by a filled circle. The detection device 110 enables the contactless reading out of the data stored in the second and third RFID transponders 101, 102.

Fig. 6 shows in perspective the adapter 20 of the in Fig. 5 shown second tool 10. At the upper end of the adapter 20, a collar 15 can be seen as the end closure of the second piston rod 14. When the adapter 20 is installed, the collar 15 is in operative connection with the cylinder-piston system. When the trigger 12.1 is actuated, the cylinder-piston system presses on the collar 15, as a result of which the second actuator 60 is actuated and the second forcing section 62 is pressed against the chisel shaft 71. When the trigger 12.1 is released, the cylinder-piston system is reset. The piston rod 14 is thereby activated by an the spring element 22 engaging the collar 15 is set back in such a way that the second forcing section 62 emerges from the second chisel receptacle 42 ( Fig. 5 ) is adjusted. The detection device 110 is shown schematically on the second base part 21 of the adapter 20. The detection device 110 can be completely or partially attached to the second base part 21 or, as in FIG Fig. 5 shown, be arranged on the second actuator 60. The detection device 110 has a counting device 113. The detection device 110 is also assigned the RFID reader 111. In the present case, the detection device 110 also includes a memory 114 and a radio interface 112.

With the aid of the detection device 110, the number of chisels 70 mounted with the second tool 10 can be detected. For this purpose, when the trigger 12.1 is actuated, a count of the counter 113 is increased by one. After maintenance has ended, for example when all worn chisels 70 of a milling drum 80 have been dismantled and replaced with new ones, the counter reading can be sent to a higher-level control unit (not shown). In the present case, this takes place wirelessly via the radio interface 112. However, it is also conceivable to use the data stored in the memory 114 in a wired manner, for example via the in Fig. 5 power contacts 11 shown to be transmitted to the control unit.

When the trigger 12.1 is actuated, the identifier arranged on the two-part chisel holder system 3 or the identifiers arranged on the two-part chisel holder system 3 are read out. In the present case, the identifiers are designed as second and third RFID transponders 101, 102. These are read out contactlessly with the aid of the RFID reader 111. The data is stored in memory 114. They can, together with the counter reading, be transmitted to the control unit via the radio interface 112.

The invention is not limited to that in Figs. 1 to 6 illustrated embodiments. It can be transferred to any other one-part or multi-part bit holder systems 1, 2, 3 and the tools 10, 90 provided for this purpose for changing the bit 70.

It is conceivable that the detection device 110 is assigned a data interface. The data interface is not shown in the exemplary embodiments shown. The data interface is designed to transfer data to the identifiers arranged on the bit holder systems 1, 2, 3. In this way, for example, data on a built-in chisel 70 or a change in time of a chisel 70 can be transferred to the respective identifier. This data can then be read out and evaluated the next time the tool is changed.

It is conceivable, when the trigger 12.1 is actuated, to only increase the count of the counter 113 if data from at least one identifier can be read out at the same time. This ensures that the tool 10, 90 was attached to a bit holder system 1, 2, 3 when an assembly or disassembly was triggered. For example, a counter reading of the counter 113 can only be increased if an RFID transponder 100, 101, 102 is arranged within radio range of the RFID reader 111 and can be read out. Inadvertent actuation of the trigger 12.1 when the tool 10, 90 is not attached to the chisel holder system 1, 2, 3 thus does not lead to an increase in the count. After the data has been transferred, the counter reading can be reset and / or the stored data can be deleted.

It is also conceivable that the counter reading for dismantled or assembled chisels 70 is increased when the detection device 110 has read out an identifier without a trigger 12.1 having been actuated. For example, it can be provided that the counter reading is increased if an RFID transponder 100, 101, 102 arranged on a chisel holder 1, 2, 3 or a chisel 70 is within radio range of an RFID reader 111 arranged on the tool 10, 90 the detection device 110 arrives. The data read out can be taken into account when increasing the counter reading. It can thus be provided that the counter reading for an identifier that has been read out can only be changed once within a specified period of time. This avoids that when an identifier is read out repeatedly, for example when a tool 10, 90 has to be set twice when assembling the chisel, the counter reading is changed by more than one.

As described above, information on the position of the bit holder system 1, 2, 3 on the milling drum 80 and / or for the clear identification of the bit holder system 1, 2, 3 can be stored in the identifiers, in this case the RFID transponders 100, 101, 103. These data are read out by the detection device 110 when the trigger 12.1 is actuated. The bit change that has taken place can be assigned to this data and thus to a specific bit holder system 1, 2, 3 on the milling drum 80. With the aid of the detection device 110, the frequency with which the chisel 70 was exchanged on a specific bit holder system 1, 2, 3 of the milling drum 80 can thus be detected. This can be stored in the memory 114 and transmitted to the higher-level control unit. In addition, as described above, the total number of exchanged chisels 70 can be detected with the detection device 110.

The detection device 110 is advantageously arranged on the tool 10, 90. Accordingly, no detection device 110 and, for example, no RFID reader 111 or no barcode reader need to be arranged on the milling machine. As a result, the detection device 110 or the RFID reader 111 or the barcode reader are protected from high mechanical stress, as is the case during operation with an arrangement on the milling machine.

• das Verschleißverhalten der Meißel 70
• Materialeigenschaften des gefräßigen Untergrundes
• die Effizienz des Maschineneinsatzes
• die Kosten für den Maschineneinsatz

für eine durchgeführte Fräsarbeit bestimmt werden. Dabei ist die Erfassung der ausgewechselten Meißel 70 mit dem erfindungsgemäßen Werkzeug 10, 90 bei geringem Aufwand kosteneffizient möglich. Mit Hilfe der Kennungen, beispielsweise in Form der gezeigten RFID-Transponder 100, 101, 102 kann zusätzlich die Position der ausgetauschten Meißel 70 mit bestimmt werden. Es kann somit das Verschleißverhalten der Meißel 70 in Abhängigkeit von ihrer Einbauposition auf der Fräswalze 80 ermittelt werden. Um dies zu ermöglichen, ist das jeweilige Meißelhaltersystem 1, 2, 3 mit zumindest einer Kennung, beispielsweise in Form eines RFID-Transponders 100, 101, 102 ausgestattet. Die Kennung kann dabei an einem Meißelhalter 30, 40 und/oder an einem Basisträger 50 des jeweiligen Meißelhaltersystems 1, 2, 3 angeordnet sein. Das Auslesen der Kennung erfolgt durch das Montage-/Demontagewerkzeug (Werkzeug 10, 90) beim montieren bzw. demontieren eines Meißels 70.On the basis of the number of changed chisels 70 determined with the aid of the tool 10, 90

• the wear behavior of the chisels 70
• Material properties of the voracious subsoil
• the efficiency of machine use
• the cost of using the machine

for a performed milling work. Detection of the replaced chisels 70 with the tool 10, 90 according to the invention is possible in a cost-effective manner with little effort. With the help of the identifiers, for example In the form of the shown RFID transponders 100, 101, 102, the position of the exchanged chisels 70 can also be determined. The wear behavior of the chisels 70 can thus be determined as a function of their installation position on the milling drum 80. To enable this, the respective bit holder system 1, 2, 3 is equipped with at least one identifier, for example in the form of an RFID transponder 100, 101, 102. The identifier can be arranged on a chisel holder 30, 40 and / or on a base carrier 50 of the respective chisel holder system 1, 2, 3. The identification is read out by the assembly / disassembly tool (tool 10, 90) when assembling or disassembling a chisel 70.

A prognosis about the life expectancy of the chisels 70 can be made on the basis of the data recorded in this way. This can be taken into account when planning the maintenance intervals and the replacement chisels provided. The data can also be used to plan commenced or future milling work. For this purpose, the data can advantageously be stored in relation to a respective milling drum type and / or a respective milling machine on which the data were determined. Furthermore, the recorded data can be linked with other data, for example with an expansion capacity (milling volume), with machine parameters with which the milling machine was operated, or with a place of use of the milling machine. This can already take place in the memory 114 or in the external memory unit to which the data are transferred.

The identifiers are advantageously only required on the bit holder system 1, 2, 3, but not on the chisels 70 themselves. Due to the significantly longer service life of the bit holder systems 1, 2, 3 compared to the chisels 70, only a comparatively small number of identifiers is required compared to known systems in which, for example, RFID transponders 100, 101, 103 are attached to the chisels 70. However, it is also conceivable, in addition to the bit holder systems 1, 2, 3, to also provide the chisels 70 with identifiers. In these, for example, the chisel type or the material number of the chisel 70 can be stored. These identifiers can then also be read out with the detection device 110 arranged on the tool 10, 90.

In addition to the position data and data for identifying a respective bit holder system 1, further data can be stored in the assigned identifier. For example, a material number or an assembly date or an assembly time of the chisel holder system 1, 2, 3 and / or a chisel 70 can be stored in the identifier.

According to a conceivable variant of the embodiment, not shown, several RFID reading devices 111 can be arranged on the tool 10, 90. This enables the identifiers to be read out reliably even under unfavorable installation situations.

According to a further conceivable embodiment variant of the invention, it can be provided that the detection device 110 is designed to read out an identifier of the bit holder system 1, 2, 3 when the at least one trigger 12.1 is actuated and to compare it with data stored in the detection device 110 and that a Disassembly of the chisel 70 with the tool 10, 90 is prevented if the data read out from the identifier do not match the stored data. The tool 10, 90 can thus only be used for the exchange of chisels 70 on previously established chisel holder systems 1, 2, 3. An unauthorized chisel change is prevented.

Claims (21)

1. A tool (10, 90) for mounting a chisel (70) to and/or for removing a chisel (70) from a chisel holder system (1, 2, 3) of a milling machine, in particular a road milling machine, having at least one trigger (12.1) by which mounting and/or removal of a chisel (70) is triggered, wherein the tool (10, 90) has a detection device (110) having at least one counting device (113) and wherein the detection device (110) is designed to detect a number of chisels (70) that have been removed using the tool (10, 90) and/or a number of chisels (70) that have been mounted using the tool (10, 90),
   characterised in that the detection device (110) is designed, upon actuation of the at least one trigger (12.1), to read out at least one identifier arranged on the chisel holder system (1, 2, 3) to which the tool (10, 90) is attached and/or in that the detection device (110) is designed, upon actuation of the at least one trigger (12.1), to read out at least one identifier arranged on the chisel (70) held by the tool holder system (1, 2, 3) to which the tool (10, 90) is attached.
2. The tool (10, 90) according to claim 1, characterised in that the detection device (110) is designed, upon actuation of the at least one trigger (12.1), to increase by one a counter reading of the counting device (113) for the number of removed chisels (70) or for the number of fitted chisels (70).
3. The tool according to claim 1 or 2, characterised in that the detection device (110) is designed to read out a data carrier, in particular an electronic data carrier, arranged as an identifier on the chisel holder system (1, 2, 3).
4. The tool (10, 90) according to any one of claims 1 to 3, characterised in that the detection device (110) is designed to contactlessly read out the identifier.
5. The tool (10, 90) according to one of claims 1 to 4, characterised in that the detection device (110) is designed, upon actuation of the at least one trigger (12.1), to detect a position, on a milling drum (80), of the chisel holder system (1, 2, 3) to which the tool (10, 90) is attached.
6. The tool (10, 90) according to any one of claims 1 to 5, characterised in that the detection device (110) has an RFID reading apparatus (111).
7. The tool (10, 90) according to any one of claims 1 to 6, characterised in that the tool (10, 90) has a base part (21, 91), on which an actuating element (60, 94) having a push-off portion (62, 96) and/or a retractable portion is movably mounted, and in that the actuating element (60, 94) is directly or indirectly coupled to an actuator.
8. The tool (10, 90) according to claim 6 or 7, characterised in that at least a part of the detection device (110), in particular the RFID reading apparatus (111), is arranged on or in the actuating element (60, 94) or on or in the base part (21, 91) of the tool (10, 90).
9. The tool (10, 90) according to any one of claims 1 to 8, characterised in that the detection device (110) is designed to detect an actuation of the at least one trigger (12.1) without any fitting or removal of a chisel (70) having occurred and then not to change the number of the detected fitted and/or removed chisels (70) and/or in that the detection device (110) is designed, in the event of repeated actuation of the at least one trigger (12.1) within a predefined period of time, not to change the number of detected fitted and/or removed chisels (70) and/or in that the detection device (110) is designed, in the event of repeated reading of the same identifier within a predefined second period of time, not to change the number of detected fitted and/or removed chisels (70) and/or in that the detection device (110) is designed, in the event of actuation of the at least one trigger (12.1) and failure to read an identifier, not to change the number of detected fitted and/or removed chisels (70).
10. The tool (10, 90) according to any one of claims 1 to 9, characterised in that the detection device (110) is designed to read out an identifier arranged on a base carrier (50) of the chisel holder system (1, 2, 3) and/or to read out an identifier arranged on a replaceable chisel holder (40) assigned to the base carrier (50).
11. The tool (10, 90) according to any one of claims 1 to 10, characterised in that the detection device (110) is designed, in the event of actuation of the at least one trigger (12.1), to read out the at least one identifier arranged on a chisel holder system (1, 2, 3) and to detect the position of the chisel holder system (1, 2, 3) on the milling drum (80) and in that the detection device (110) is designed, by comparing the data read out from the identifier with data saved in the detection device (110) for the position on the milling drum (80), to detect a changed, replaceable chisel holder (40) at this position.
12. The tool (10, 90) according to any one of claims 1 to 11, characterised in that the detection device (110) has a memory (114) and in that the data read out from the identifiers and/or the times at which each identifier was read out, can be stored in the memory (114) and/or in that the stored data and/or times are assigned to a counter reading of the counting device (113).
13. The tool (10, 90) according to any one of claims 1 to 12, characterised in that the tool (10, 90) has a wired interface or a radio interface (112) for the electronic transmission of data.
14. The tool (10, 90) according to any one of claims 1 to 13, characterised in that the tool (10, 90) and/or the detection device (110) has a data interface and in that the data interface is designed to transmit data to the data carrier arranged as an identifier on the chisel holder system (1, 2, 3).
15. A chisel holder system (1, 2, 3) for a milling machine, in particular a road milling machine, having at least one chisel receptacle (40) for the detachable fastening of at least one chisel (70) to a milling drum (80) of the milling machine,
    characterised in that
    at least one contactlessly readable electronic data carrier is arranged as an identifier on or in the chisel holder system (1, 2, 3) and in that the data carrier contains information for identifying the chisel holder system (1, 2, 3) and/or about the position of the chisel holder system (1, 2, 3) on the milling drum (80).
16. The chisel holder system (1, 2, 3) according to claim 15, characterised in that the data carrier is arranged in a region of the chisel holder system (1, 2, 3) protected from abrasion.
17. The chisel holder system (1, 2, 3) according to claim 15 or 16, characterised in that the data carrier is an active or passive RFID transponder (100, 101, 102).
18. The chisel holder system (1, 2, 3) according to any one of claims 15 to 17, characterised in that the data carrier contains information about the time of installation of a chisel (70) held in the chisel holder system (1, 2, 3).
19. The chisel holder system (1, 2, 3) according to any one of claims 15 to 18, characterised in that the chisel holder system (1, 2, 3) has a chisel holder (30) fixedly connected to the milling drum (80) and in that the at least one data carrier is arranged on or in the chisel holder (30) or in that the chisel holder system (1, 2, 3) has a base carrier (50) fixedly connected to the milling drum (80) and a replaceable chisel holder (40) detachably connected to the base carrier (50) and in that at least one data carrier is arranged on or in the base carrier (50) and/or on or in the replaceable chisel holder (40).
20. A method for monitoring wear of chisels (70) and/or of replaceable chisel holders (40) on chisel holder systems (1, 2, 3) of a milling drum (80) of a milling machine, in particular a road milling machine, wherein, to replace the chisels (70), the chisels (70) are removed from the chisel holder systems (1, 2, 3) with the aid of a tool (10, 90) and/or wherein the chisels (70) are fitted to the chisel holder systems (1, 2, 3) with the aid of the tool (10, 90) and wherein the wear behaviour of the chisels (70) and/or the replaceable chisel holders (40) is determined on the basis of the number of replaced chisels (70) and/or the number of replaced replaceable chisel holders (40),
    characterised in that
    a tool according to any one of claims 1 to 14 and/or a chisel holder system (1, 2, 3) according to any one of claims 15 to 19 is used,
    in that the number of chisels (70) fitted and/or removed using the tool (10, 90) is detected by a detection device (110) arranged on the tool (10, 90)
    and/or
    in that the position of a chisel (70) fitted and/or removed using the tool (10, 90) is detected by the detection device (110) arranged on the tool (19, 90)
    and/or
    in that the position and an unambiguous identification of a chisel holder system (1, 2, 3) from which/to which a chisel (70) is removed/fitted is detected by the detection device (110).
21. The method according to claim 20, characterised in that the position of a removed and/or fitted chisel (70) and/or the position of a replaceable chisel holder (40) from which/to which a chisel (70) is removed and/or fitted is detected by reading an identifier arranged on the chisel holder system (1, 2, 3).

Images