Working device with filter cleaning device and method for its operation

Abstract

A working device with a tool driven by a drive motor (9), the drive motor (9) being supplied with power by a power supply unit (8), the power supply unit (8) being held replaceably with respect to a housing (2) of the working device (1), with an air filter (12), characterized in that a filter cleaning device (19) is provided which is designed to carry out a cleaning movement (36) to reduce the contamination of filter material (26) of the air filter (12), that the cleaning movement (36) is coupled to a movement of a component occurring when the power supply unit (8) is replaced, that the filter cleaning device (19) comprises at least one cleaning element (20) which carries out the cleaning movement (36),and that the cleaning element (20) moves along the filter material (26) when performing the cleaning movement (36) and strips off dirt from the filter material (26).

Description

[0001] The invention relates to a working device of the type specified in the preamble of claim 1 and to a method for operating a working device of the type specified in the preamble of claim 7 or the preamble of claim 8.

[0002] Work tools with a tool driven by a drive motor, in which the drive motor is powered by a power supply unit, and in which the power supply unit is replaceably mounted on or in the housing of the work tool, are generally known. It is also known to provide an air filter in such work tools to protect the drive motor from contamination.

[0003] EP 2 747 949 B1 discloses a hand tool with a battery and an air filter.

[0004] DE 10 2018 215 308 A1 discloses a dust extraction device for a handheld power tool. The dust extraction device is designed as an accessory for the handheld power tool. The dust extraction device comprises a filter unit and a filter cleaning unit. The filter cleaning unit can be activated automatically while the dust extraction device is connected to the handheld power tool.

[0005] DE 103 60 251 A1 discloses a power tool with a detachable power supply unit. The power tool has a switch for turning the power tool on and off. When the power supply unit is decoupled, the switch is set to the off position.

[0006] US 2019 / 0 262 753 A1 discloses a chainsaw with a battery. An air inlet opening is formed between the inner edge of a housing slot for the battery and the periphery of the battery. An air filter is arranged in the housing slot, through which cooling air is drawn into the interior of the housing and to the motor.

[0007] EP 2 011 992 B1 discloses a tool, namely a power cutter, which has a device for cleaning the pleats of an air filter. The air filter is an intake air filter of the tool's internal combustion engine. To perform the cleaning movement, a handle is provided on the side of the housing, which the operator pulls out of the housing. When the handle is pulled out, the pleats of the air filter are moved, causing dirt to fall off the filter. Alternatively, the air filter can be moved mechanically when the starter handle of the internal combustion engine is pulled, thus causing dirt to fall off.

[0008] In the prior art, a cleaning movement is performed each time the starter rope is pulled. The frequency of the cleaning movement depends on how often the engine is started. For work requiring frequent starting of the engine with short engine running times, the air filter is cleaned excessively frequently in the prior art, thus placing considerable strain on it. Pulling the starter rope typically requires a great deal of force from the operator. The fact that the operator not only has to exert force to start the engine when pulling the starter rope, but also has to exert force to perform the cleaning movement, makes starting the engine even more difficult.

[0009] The invention is based on the object of creating a tool of the generic type in which regular cleaning of the air filter is ensured in a simple manner. A further object of the invention is to provide a method for operating a tool that ensures regular filter cleaning in a simple manner.

[0010] This object is achieved with respect to the working device by a working device having the features of claim 1. With respect to the method, the object is achieved by a method having the features of claim 7 or by a method having the features of claim 8.

[0011] The working device is provided with a filter cleaning device designed to perform a cleaning movement to reduce contamination of the filter material of the air filter. To ensure that the cleaning movement is performed regularly, the cleaning movement is coupled to a movement of a component that occurs when replacing a power supply unit.

[0012] For tools with a power supply unit, the power supply unit must be replaced regularly. In this case, "replacing" means that the power supply unit is removed from the housing or taken out of the housing and a different or the same power supply unit is reattached to the housing or inserted into the housing, for example after the power supply unit has been recharged. The time interval between the removal or removal and the fastening or insertion is irrelevant. For example, the removal or removal and the fastening or insertion can take place immediately one after the other or, alternatively, at a considerable time interval, for example if the tool is stored without the power supply unit over the winter. When the power supply unit needs to be replaced depends to a large extent on the operating time of the drive motor.The degree of contamination of an air filter also depends, at least in part, on the operating time of the drive motor. By executing the cleaning movement in conjunction with a movement performed when replacing the power supply unit, it is easy to ensure that the cleaning movement is performed regularly. The operator does not have to perform a separate action to perform the cleaning movement, so the operator cannot forget to perform the cleaning movement.

[0013] Replacing the power supply unit typically requires little force from the operator. Especially when inserting a power supply unit from above into a housing receptacle, the movement is primarily due to the power supply unit's own weight. If the cleaning movement is coupled to this movement, the weight of the power supply unit can be used at least partially to execute the cleaning movement.

[0014] The power supply unit is held relative to the housing of the working device. For this purpose, the power supply unit can be held at least partially in a receptacle of the housing. Alternatively, it can be provided that the power supply unit is arranged outside the housing and held on the housing. For example, the power supply unit can be inserted into at least one guide of the housing in the manner of a slide for fixing to the housing. In particular, a housing of the power supply unit is coupled to a housing of the working device via a mechanical connection. The mechanical connection is in particular a rigid mechanical connection.The mechanical connection, in particular the rigid mechanical connection, can result in particular from the arrangement of the energy supply unit in the housing of the working device or from the mechanical coupling of the housing of the energy supply unit to the housing of the working device.

[0015] In a further alternative embodiment, the power supply unit can be secured to the housing of the implement via a cable. In this embodiment, the power supply unit can be, for example, a battery worn on the back or a battery worn on a hip belt or the like. In this embodiment, the power supply unit is secured to the housing of the implement via the power cable, which is particularly flexible. Accordingly, in this embodiment, there is no rigid mechanical connection between the housing of the power supply unit and the housing of the implement.

[0016] The power supply unit is, in particular, a battery or rechargeable battery. Such rechargeable batteries must be removed from the housing at regular intervals to be replaced or recharged. Alternatively, the power supply unit can also be a battery adapter, i.e., an adapter that can be inserted into a battery or rechargeable battery receptacle or connected to the housing in a contact-like manner and has a cable for connection to an external power supply, for example, a standard power outlet, a backpack-mounted battery, or the like. It can also be provided that the power supply unit is held relative to the tool via a cable. The cleaning movement can then be coupled to the plugging and / or unplugging of the cable.

[0017] The air filter is specifically an air filter that filters cooling air for the drive motor.

[0018] The tool is, in particular, a hand-held, particularly hand-carried tool. The tool is, in particular, a chainsaw, a brush cutter, a power cutter, a vacuum / blower, or the like. However, the tool can also be a hand-held, ground-moving tool such as a lawnmower. Replacing the power supply unit can, in particular, comprise releasing a lock on the power supply unit, such as, for example, actuating a locking lever or latching lever, removing the power supply unit from the housing or detaching the power supply unit from the housing, inserting a different or the same power supply unit or attaching it to the housing, and fixing the power supply unit via a latching movement, actuating a fixing lever, or the like. In particular, the cleaning movement is coupled to at least one of these movements.The component to whose movement the cleaning movement is coupled can in particular be a movement of the energy supply unit itself or a movement of a locking lever or the like.

[0019] In particular, the cleaning movement is mechanically coupled to the movement of the component. Alternatively or additionally, an electrical, magnetic, hydraulic and / or pneumatic coupling of the cleaning movement to the movement of the component can be provided. An electrical coupling to the movement of a component can be achieved, for example, via a sensor that detects a predetermined position or a movement of the power supply unit, or a switch that is actuated when the power supply unit is replaced. A coupling to the contact between the power supply unit and the work tool, which is released when the power supply unit is moved when the power supply unit is removed or detached and established when the power supply unit is inserted or connected, can also be provided.

[0020] In particular, the cleaning movement is coupled to a movement of the power supply unit. Alternatively, the cleaning movement can also be coupled to a movement of a component to be actuated when replacing the power supply unit, such as a locking lever or the like. In particular, the cleaning movement is coupled to a movement of the power supply unit in a direction out of the housing. Alternatively or additionally, the cleaning movement can also be coupled to a movement of the power supply unit in a direction into the housing. Particularly advantageously, the execution of the cleaning movement is coupled to a movement of the power supply unit which, in the storage position of the working device, is at least partially directed in the direction of gravity.

[0021] In particular, it is provided that the filter cleaning device has at least one spring element for storing energy for carrying out the cleaning movement. Alternatively or additionally, it can be provided that a cleaning movement is coupled to the movement of the energy supply unit or the movement of a component moved when the energy supply unit is replaced. In particular, the spring element is tensioned when the energy supply unit executes a movement that is at least partially directed in the direction of gravity when the implement is in the parked position. A movement of the energy supply unit that is at least partially directed counter to the direction of gravity when the implement is in the parked position is supported in particular by the energy stored in the spring element. This is particularly advantageous when an operator replaces the energy supply unit when the implement is in the parked position.

[0022] In particular, it is provided that a movement of the power supply unit relative to the housing, in particular a movement of the power supply unit in a direction into the housing, tensions the at least one spring element. It can be provided that, in addition to tensioning the spring element, a cleaning movement is performed.

[0023] The filter cleaning device comprises at least one cleaning element that performs the cleaning movement. The cleaning element moves along the filter material during the cleaning movement and scrapes off contaminants from the filter material.

[0024] In particular, the cleaning element comprises at least one elongated and dimensionally stable scraper. The scraper moves along the filter material, particularly during the cleaning movement. The scraper can be designed like a blade, particularly on at least one side facing forward during the cleaning movement, especially on both long sides, and can have an edge that can scrape contaminants off the filter material.

[0025] In an alternative embodiment, it can be provided that the cleaning element comprises at least one brush which is moved in particular over the filter material when the cleaning movement is carried out.

[0026] In particular, the cleaning element moves in a pivoting movement over the filter material. Alternatively, it can be provided that the cleaning element performs a translational movement over the filter material. A pivoting movement can be implemented structurally using a simply designed pivot bearing. If the cleaning element performs a translational movement, rectangular filter geometries in particular can be completely cleaned. With a translational movement, a vertical, a horizontal or a movement inclined to the storage surface can be provided with respect to the storage position. A rotating movement of a cleaning element can also be provided. For example, the cleaning element can have one or more scrapers that protrude outwards from a rotational axis in the manner of one or more wings.

[0027] The filter material is, in particular, flat filter material. The filter material is preferably arranged flat and not folded or pleated. This allows for easy cleaning of the filter material by a wiping motion.

[0028] To remove dirt removed from the filter material, the housing is provided with an outlet opening through which dirt removed from the filter material can exit the housing. In particular, the housing's outlet opening is arranged vertically below the filter material on the dirt side of the filter material when the implement is in a storage position, in which the implement is standing on a horizontal, level surface. In particular, the outlet opening runs at least partially below the filter material in the storage position.

[0029] The filter material is particularly oriented so that the removed dirt falls off the filter material when the implement is parked. The filter material is particularly vertically oriented when the implement is parked, or the dirt side of the filter material faces downward.

[0030] For a method for operating a work device, wherein the work device has a filter cleaning device designed to perform a cleaning movement to reduce the contamination of filter material of the air filter, it is provided that the cleaning movement is carried out when the power supply unit is replaced. Since the power supply unit must be replaced at regular intervals, i.e. exchanged or removed for charging and placed back on or in the housing, regular and sufficiently frequent execution of the cleaning movement can be ensured by performing the cleaning movement when the power supply unit is replaced. The operator does not have to operate an additional control element to perform the cleaning movement, which could also be forgotten.

[0031] For an alternative method for operating a work device, wherein a controller for controlling the drive motor and a device for activating the control device are provided, it is provided that the cleaning movement is executed upon actuation of the device for activating the control device. The device for activating the control device must usually be actuated each time the work device is started up. This can ensure that the cleaning movement is carried out frequently. This is particularly advantageous if the work device is typically used in environments where a lot of dirt occurs or if the work device itself generates a lot of dust.

[0032] Embodiments of the invention are explained below with reference to the drawings. They show: Fig. 1 a side view of a hand-held tool, Fig. 2 a perspective view of components of the working device arranged in the area of ​​the filter cleaning device and the power supply unit of the working device, in a position of the power supply unit when replacing the power supply unit, Fig. 3 the arrangement Fig. 2 with inserted power supply unit, Fig. 4 a perspective view of a housing part of the working device, Fig. 5 and Fig. 6 perspective exploded views of the filter cleaning device, Fig. 5a an enlarged partial view of the area Va from Fig. 5, Fig. 6a an enlarged partial view of area VIa from Fig. 6, Fig. 7 to Fig. 9 parts of the filter cleaning device and the air filter in perspective exploded view, Fig. 10 is a schematic side view of an embodiment of a working device, Fig. 11 a perspective, partially schematic representation of the power supply unit and the filter cleaning device of the working device from Fig. 10.

[0033] Fig. Figure 1 schematically shows a working device 1. The exemplary embodiment shows a chainsaw as the working device 1. However, the working device 1 can also be a power cutter, a brush cutter, a vacuum / blower, a lawnmower, or the like. The working device 1 is, in particular, a hand-held working device, particularly a portable, hand-held working device.

[0034] The implement 1 comprises a housing 2, on which a rear handle 3 and a handle tube 4 for guiding the implement during operation are arranged. Other handles may also be advantageous. The housing 2 can be designed in a suitable, known manner. The housing 2 can, for example, be constructed in several parts and be partially open to the environment.

[0035] The tool 1 comprises a saw chain 6. The saw chain 6 is arranged circumferentially on a guide bar 5. The guide bar 5 is attached to the housing 2.

[0036] A drive motor 9 is provided to drive the saw chain 6, which in the exemplary embodiment is arranged in the housing 2. The drive motor 9 is shown only schematically. The drive motor 9 is, in particular, an electric motor.

[0037] To operate the implement 1, the implement 1 has control elements 7 on the handle 3. In particular, one of the control elements 7 is a locking lever, and the other of the control elements 7 serves to control the drive motor 9.

[0038] A power supply unit 8 is arranged in the housing 2. In the exemplary embodiment, the power supply unit 8 is held in a receptacle 38 of the housing 2 that is open to the environment. It can also be provided that the power supply unit 8 only partially immerses in the housing 2. An arrangement outside the housing 2 can also be advantageous. For example, the power supply unit 8 can be held on the housing 2 in the manner of a slide on one or more guides, on which the power supply unit 8 can be inserted. In the exemplary embodiment, the power supply unit 8 has a Fig. 2, which is only partially shown, which is arranged in and held in the receptacle 38. The housing 10 of the power supply unit 8 is, in particular, rigidly connected to the housing 2 of the working device 1.

[0039] The power supply unit 8 is, in particular, a rechargeable battery. The power supply unit 8 can alternatively be a battery or a rechargeable battery adapter. In this case, a rechargeable battery adapter is understood to be a structural unit that can be inserted into the receptacle 38 for the power supply unit 8 to supply power to the working device 1 and that has a power cable for connection to a power outlet.

[0040] During operation, the drive motor 9 is cooled by cooling air. The housing 2 has an intake opening 11 for the cooling air. The intake opening 11 can be formed, for example, by slots or openings in a grille.

[0041] Fig. 1 shows the implement 1 in a storage position 40, in which the implement 1 stands on a flat, horizontal support surface 41. In the storage position 40, the rear handle 3 and the handle tube 4 protrude upwards in particular, so that the implement 1 can be easily grasped by an operator in the storage position 40.

[0042] In the housing 2, in particular adjacent to the intake opening 11, there is a Fig. 2 partially shown air filter 12 is arranged. The air filter 12 comprises, as Fig. 5 shows a carrier 13 and filter material 26. The filter material 26 is in Fig. 2 is not shown. The filter material 26 can be bonded to the carrier 13, for example, by a material bond, in particular by gluing, or can be injected onto the carrier 13, for example.

[0043] To ensure regular cleaning of the filter material 26, a filter cleaning device 19 is provided. The filter cleaning device 19 comprises, as Fig. 2 shows a cleaning element 20. The cleaning element 20 is arranged between a first, in Fig. 2 shown end position 21 and a second, in Fig. 3. In the exemplary embodiment, the cleaning element 20 is pivotally mounted on the carrier 13 by a pivot bearing 17 about a pivot axis 25. Another position of the pivot bearing 17 may also be advantageous.

[0044] The carrier 13 has an edge 14 which is in the storage position 40 ( Fig. 1) has an interruption 31 on its downward-facing side. Through the interruption 31, dirt removed by the cleaning element 20 can fall downward. In the exemplary embodiment, the carrier 13 has several screw eyes 37 for securing it to the housing 2.

[0045] To replace the power supply unit 8, the power supply unit 8 performs a movement in one direction 43 when the power supply unit 8 is removed from the receptacle 38. When the power supply unit 8 or another power supply unit 8 is reinserted, this power supply unit 8 performs a movement in an opposite direction 42 into the receptacle 38.

[0046] The cleaning element 20 is rotationally fixedly coupled to a coupling element 24. In the exemplary embodiment, the coupling element 24 transmits a movement of the energy supply unit 8 to the cleaning element 20. The coupling element 24 converts the translational movement of the energy supply unit 8 in direction 42 into a pivoting movement of the cleaning element 20.

[0047] In the storage position 40, the direction 42 is at least partially aligned in the direction of gravity. In particular, the direction 42 is aligned approximately vertically downward in the storage position 40. The movement of the energy supply device 8 in the direction of arrow 42 is therefore assisted by gravity in the storage position 40. In particular, the insertion and locking of the energy supply device 8 in the storage position 40 is only partially or completely possible due to the weight of the energy supply.

[0048] The coupling element 24 projects into the receptacle 38. For this purpose, an opening 18 is formed in a side wall of the receptacle 38. The coupling element 24 lies in particular against an underside of the energy supply unit 8 and is carried along by the energy supply unit 8 during a movement in the direction 42. In the exemplary embodiment, the coupling element moves in the illustration according to Fig. 2 downwards in the opening 18. In particular, the coupling element 24 moves at least partially in the direction of gravity relative to the storage position 40.

[0049] In the exemplary embodiment, the coupling element 24 is prestressed via a spring element 23. Fig. 2 shows the relaxed position of the spring element 23. The spring element 23 can be, for example, a rubber ring or the like, as in Fig. 2. A different design of the spring element 23 can also be provided. The spring element 23 causes the coupling element 24 to follow the movement of the power supply unit 8 when the power supply unit 8 moves in the direction 43. The coupling element 24 moves in the opening 18 in the illustration in Fig. 2, and in particular with respect to the direction of gravity in the parking position 40, upwards.

[0050] The receptacle 38 is, for example, a battery compartment. The opening 18 can, for example, be formed as an arcuate opening in the wall of the receptacle 38. In particular, the opening 18 extends in a circular arc around the pivot axis 25.

[0051] If the power supply unit 8 is removed from the Fig. 2 in the direction of arrow 42 into the receptacle 38, the spring element 23 is tensioned. In the exemplary embodiment, the spring element 23 is suspended on a pin 39 on the outside of the receptacle 38 and on the coupling element 24. A movement of the power supply unit 8 into the position shown in Fig. 3, inserted in the housing 2, the cleaning element 20 has a position opposite the carrier 13 and the Fig. 3 not shown filter material 26. In doing so, the cleaning element 20 has moved along the filter material 26 and performed a cleaning movement 36. The cleaning movement 36 is repeated both when inserting the power supply unit 8 in the direction of arrow 42 and when removing the power supply unit 8 in the direction of arrow 43 ( Fig. 2). This is indicated by the double arrow in Fig. 3 shown.

[0052] In the illustrated embodiment, the movement of the power supply unit 8 in the direction of arrow 42 is assisted by gravity in the storage position 40. The movement in the direction of arrow 43 is assisted by the force stored in the spring element 23.

[0053] Fig. 4 shows a housing part 15 of the housing 2. The housing part 15 forms the suction opening 11 as well as a part of the rear handle 3. The housing part 15 forms a part of a bottom 16 of the housing 2. As Fig. 4, the base 16 has an outlet opening 29. The outlet opening 29 is in the storage position 40 below the filter material 26, in particular in the area below a dirt side 27 ( Fig. 5) of the filter material 26. The housing part 15 has an edge 44 against which the edge 14 of the carrier 13 rests in the installed state, forming a filter housing with it. In the exemplary embodiment, the housing part 15 has fastening openings 35 to which the carrier 13 can be secured via the screw eyes 37.

[0054] The intake opening 11 forms an inlet for cooling air. The cooling air is drawn through the filter material 26 into the interior of the housing 2. The dirt filtered out of the cooling air settles on the dirt side 27 of the filter material 26 or can fall out of the housing via the outlet opening 29.

[0055] Fig. Figure 5 shows a perspective exploded view of the dirty side 27 of the filter material 26. The cleaning element 20 is arranged on the dirty side 27. The carrier 13 runs on the opposite side of the filter material 26 and, with the edge 14, on the circumference of the filter material 26. The coupling element 24 is connected to the cleaning element 20 in a rotationally fixed manner, as described in detail in Fig. 7 shown.

[0056] How Fig. As shown in Figure 7, the cleaning element 20 in the exemplary embodiment has a coupling contour 32 that engages with an associated coupling contour 33 of the coupling element 24. In the exemplary embodiment, the coupling contour 32 is a square that projects into the coupling contour 33 formed by a square opening. A different design for the rotationally fixed connection between the cleaning element 20 and the coupling element 24 can also be provided.

[0057] The carrier 13 has a bearing opening 49 into which a bearing section 50 of the cleaning element 20 projects. The bearing opening 49 and the bearing section 50 form the pivot bearing 17 ( Fig. 2). The cleaning element 20 and the coupling element 24 are thus pivotally mounted about the pivot axis 25. In the exemplary embodiment, the pivot bearing 17 is arranged adjacent to a transverse side of the air filter 12, which runs approximately vertically in the storage position 40, in a central region of this side. An arrangement of the pivot bearing 17, for example, in the region of a corner of the air filter 12, may also be advantageous.

[0058] As the Fig. 5 and Fig. 6, the coupling element 24 has a pin 34 which engages in the spring element 23. In Fig. Figure 5 also shows the design of the opening 18 through which the pin 34 protrudes. The opening 18 extends in a circular arc around the pivot axis 25. In the exemplary embodiment, the cleaning element 20 protrudes in the region of the pivot axis 25 with an end section 30 into a receptacle 51 on the receptacle 38 of the power supply unit 8 and is additionally mounted there.

[0059] The cleaning element 20 is designed as an elongated scraper with two longitudinal edges 56 arranged adjacent to the filter material 26. As the Fig. 5a and Fig. As shown in Figure 6a, the cleaning element 20 is designed with a small thickness and approximately wedge-shaped along the longitudinal edges 56. As a result, the cleaning element 20 can move beneath contaminants on the filter material 26 during the cleaning movement 36 and lift the contaminants from the filter material 26.

[0060] The Fig. 8 and Fig. 9 show the design of the air filter 12 in detail. The filter material 26 is, for example, a fabric filter made of polyamide. Another filter material 26 may also be provided.

[0061] Fig. 6 shows the clean side 28 of the filter material 26. In Fig. 8 the clean side 28 is also shown. Fig. Figure 9 shows a view of the dirt side 27 of the filter material 26. The filter material 26 has an opening 52 through which the cleaning element 20 protrudes. The carrier 13 comprises, in particular, a plurality of stiffening struts 53. The stiffening struts 53 are designed such that the free filter surface is as large as possible. Fig. 8 and Fig. 9, the screw eyes 37 on the carrier 13 are also visible. A different design of the air filter 12 may also be advantageous.

[0062] Fig. Figure 10 shows an alternative embodiment of a working device 1. The same reference numerals denote corresponding elements in all figures. For details not described in detail Fig. 10 and Fig. 11, reference is made to the description of the previous embodiment.

[0063] The working device 1 from Fig. 10 has an activation button 46 for a particularly arranged in the housing 2, schematically in Fig. 11. To start up the working device 1, it is provided in particular that an operator must first press the activation button 46 and only then can start up the working device 1 by operating the operating elements 7.

[0064] It is provided that when the activation button 46 is actuated, the control device 45 actuates an actuator 47, for example an electric motor or another electric actuator, which moves the cleaning element 20 ( Fig. 11) to carry out the cleaning movement 36.

[0065] It can also be provided that the actuator 47 taps or shakes the filter material 26 and / or the carrier 13 in the direction of the pivot axis 25 in order to carry out a cleaning movement.

[0066] The actuator 47 can also be an electromagnet or the like.

[0067] Alternatively or additionally, a schematically illustrated switch 48 can be provided on the receptacle 38, which is actuated when the energy supply device 8 is removed and / or inserted in the direction of the arrows 42 and / or 43 and controls the control device 45 to carry out the cleaning movement by the actuator 47.

[0068] Alternatively or additionally, the connection of at least one contact 54 of the power supply unit 8 and at least one contact 55 of the receptacle 38 or at least one housing-fixed contact 55 can also serve to activate the actuator 47.

[0069] A combination of the illustrated options for cleaning the filter 12 can also be provided. Alternatively or additionally, manual operation of the filter cleaning device 19 can be provided, for example, via a button or slider to be operated by the operator.

Claims

[1] Working device with a tool which is driven by a drive motor (9), wherein the drive motor (9) is supplied with energy by a power supply unit (8), wherein the power supply unit (8) is held replaceably with respect to a housing (2) of the working device (1), with an air filter (12), characterized bythat a filter cleaning device (19) is provided which is designed to carry out a cleaning movement (36) for reducing the contamination of filter material (26) of the air filter (12), that the cleaning movement (36) is coupled to a movement of a component which takes place when the energy supply unit (8) is replaced, that the filter cleaning device (19) comprises at least one cleaning element (20) which carries out the cleaning movement (36), and that the cleaning element (20) moves along the filter material (26) when the cleaning movement (36) is carried out and wipes off contamination from the filter material (26). [2] Working device according to claim 1, characterized by that the cleaning movement (36) is mechanically coupled to the movement of the component. [3] Working device according to claim 1 or 2, characterized by that the cleaning movement (36) is coupled to a movement of the energy supply unit (8). [4] Working device according to claim 3, characterized by that the cleaning movement (36) is coupled to a movement of the energy supply unit (8) in a direction (43) out of the housing (2). [5] Working device according to one of claims 1 to 4, characterized by that the filter cleaning device (19) has at least one spring element (23) for storing the energy for the cleaning movement (36). [6] Working device according to one of claims 1 to 5, characterized by that the cleaning element (20) is pivotally mounted relative to the filter material (26). [7] Method for operating a working device, wherein the working device has a tool which is driven by a drive motor (9), wherein the drive motor (9) is supplied with energy by a power supply unit (8), wherein the power supply unit (8) is held replaceably with respect to a housing (2) of the working device (1), with an air filter (12), characterized bythat a filter cleaning device (19) is provided which is designed to carry out a cleaning movement (36) for reducing the contamination of filter material (26) of the air filter (12), that the cleaning movement (36) is carried out when the energy supply unit (8) is replaced, that the filter cleaning device (19) comprises at least one cleaning element (20) which carries out the cleaning movement (36), and that the cleaning element (20) moves along the filter material (26) when the cleaning movement (36) is carried out and wipes off contamination from the filter material (26). [8] Method for operating a working device, wherein the working device has a tool which is driven by a drive motor (9), wherein the drive motor (9) is supplied with energy by a power supply unit (8), with a control device (45) for controlling the drive motor (9) and with a device for activating the control device (45), wherein the power supply unit (8) is held replaceably with respect to a housing (2) of the working device (1), with an air filter (12), characterized bythat a filter cleaning device (19) is provided which is designed to carry out a cleaning movement (36) for reducing the contamination of filter material (26) of the air filter (12), that the cleaning movement (36) is carried out upon actuation of the device for activating the control device (45), that the filter cleaning device (19) comprises at least one cleaning element (20) which carries out the cleaning movement (36), and that the cleaning element (20) moves along the filter material (26) when the cleaning movement (36) is carried out and wipes off contamination from the filter material (26). [9] Method according to claim 8, characterized by that the cleaning movement (36) is carried out by an electric actuator (47).

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