Battery-operated machining device having at least one electromechanical interface for a replaceable battery packTechnical Field
The invention relates to a battery-operated processing device having a housing and a main handle arranged on the housing, wherein the main handle forms a substantially D-shaped recess together with the housing.
Background
EP 3 653 344a1 discloses a battery-operated machine tool in the form of a hand-held power tool, comprising a housing part which at least partially encloses an electronic unit and/or an electric motor for operating the machine tool. For the vibration-related decoupling during the machining process, the main handle of the machining tool is movably connected to the housing part. An electromechanical interface is also arranged on the main handle for receiving the exchangeable battery pack in a tool-free detachable manner, wherein the electromechanical interface is surrounded by a protective bow which is fixedly connected to the main handle and surrounds the exchangeable battery pack on both sides when the exchangeable battery pack is received in the interface, so that the falling energy is at least partially absorbed by the protective bow and kept away from the exchangeable battery pack.
From US2017,106,518 aa a battery-operated working tool is known, which is configured as a drill hammer, having a housing, a main handle arranged on the housing, which forms a substantially D-shaped recess together with the housing, and two electromechanical interfaces arranged on the housing, each for receiving a replaceable battery pack in a tool-free manner.
Disclosure of Invention
The object of the present invention is to provide a battery-operated working device which is improved over the prior art and which has a D-shaped recess formed by a housing and a main handle connected to the housing, which on the one hand ensures that at least one exchangeable battery pack inserted into the electromechanical interface is protected as well as possible from falls and/or impacts and on the other hand facilitates the handling of the working device by an operator.
In order to solve this problem, the electromechanical connector is arranged in the D-shaped recess in such a way that the replaceable battery pack can be inserted into the electromechanical connector along the insertion axis through the opening of the housing section adjoining the D-shaped recess. In this way, the housing section surrounding the opening, in combination with the housing part forming the D-shaped recess, forms a protective device for the inserted replaceable battery pack, which protective device protects the replaceable battery pack from falling or impacts, and does not require additional separate components forming the protective device. The heavier the tool, the more stable the protection device is, since the housing itself must ensure a correspondingly strong protection function, the stability and strength of which also depend on the weight of the tool. Furthermore, compared to the prior art, the available installation space of the processing tool can be optimally utilized, since this installation space is not increased by the inserted interchangeable battery pack. The arrangement of the exchangeable battery pack in the D-shaped recess also results in an ergonomic and overall more uniform appearance of the processing tool, since no exposed protective means, for example in the form of a cage or the like, are required and the contour of the processing tool is independent of whether the exchangeable battery pack is inserted into the electromechanical interface. The opening is preferably configured such that it is also suitable for future replaceable battery packs, in particular with regard to its size and/or the arrangement of the charge status display. A substantially D-shaped indentation is understood to mean that the indentation does not have to correspond exactly to "D" as long as its shape is approached. Therefore, a shape having an angle and an arc different from "D" but forming a closed notch is also conceivable.
If the housing of the battery-operated processing device is composed of two housing half-shells, for example, a protection device for the exchangeable battery pack can be formed directly from the two housing half-shells. The electromechanical interface can then be formed directly in each case in the two housing half-shells or be mounted as an insert between corresponding recesses in the housing half-shells. Furthermore, the mass of the exchangeable battery pack can be connected to the housing half-shells in order in this way to significantly reduce possible vibrations that occur during the machining process by means of the machining tool, since the connection by means of the exchangeable battery pack increases the mass of the housing half-shells to be decoupled. The reduction of vibrations also results in a longer service life of the electromechanical interface. It is also possible to mechanically decouple the mentioned insert in order to specifically reduce vibrations at the electromechanical interface.
A battery-operated machining tool is understood to be, for example, a battery-operated machine tool for machining workpieces by means of an electrically driven insert tool. The battery-operated working tool can be configured not only as a hand-held power tool, but also as a stationary machine tool having a D-shaped recess for the main handle and an electromechanical interface arranged in the D-shaped recess for a corresponding exchangeable battery pack. Typical machine tools include hand-held or bench drills, screwdrivers, hammer drills, planers, angle grinders, vibratory grinders, polishers, diamond drills, and the like. However, gardening and construction appliances such as lawnmowers, pruning saws, motors and trench mills, blowers, robotic crushers and the like as well as measuring devices such as laser rangefinders, wall scanners and the like are also contemplated as battery operated working appliances. In addition, the present invention can be applied to a battery-operated household appliance such as a dust collector, a stirrer, etc. having a D-shaped notch for a main handle.
The battery operated tool is powered by a replaceable battery pack inserted into the electromechanical interface. For this purpose, the replaceable battery pack has a housing with an electromechanical interface which is formed on one housing side in a complementary manner to the electromechanical interface of the processing device. By means of these interfaces, the exchangeable battery pack and the battery-operated processing device can be connected to one another in a force-fitting and/or form-fitting detachable manner. "detachable connection" is to be understood in particular as meaning a connection that can be detached and established without tools, i.e. manually. In the inserted state, the replaceable battery pack is also secured against accidental falls by means of a locking device in the electromechanical interface. The locking of the battery pack can be released again by pressing an unlocking key mounted on the back side of the housing of the replaceable battery pack. The exact configuration of the electromechanical interface with the electrical contacts for the force-locking and/or form-locking detachable connection should not be the subject of the invention. The person skilled in the art selects an embodiment suitable for the electromechanical interface depending on the power or voltage level of the battery-operated processing tool and/or the exchangeable battery pack, so that this will not be discussed in detail. Furthermore, the invention can also be applied to a machining device having more than one electromechanical interface for a plurality of exchangeable battery packs.
The housing section of the protection device with the opening is preferably made of a plastic material, such as PA6GF35, ABS or an elastomer. It is also conceivable that the housing part is additionally or alternatively made of other natural materials, metals (steel, aluminum, etc.), or material mixtures. The corresponding housing parts therefore carry out the additional function of protecting the battery pack in addition to the existing tasks (e.g. surrounding the internal components and components, cooling, vibration decoupling to the operator, etc.). Thus, no additional special components are required to protect the inserted replaceable battery pack, which simplifies the manufacture, storage, spare part logistics and assembly of the processing tool.
In one embodiment, the grip region of the main handle is arranged completely above the inserted exchangeable battery pack in the insertion direction extending in the direction of the insertion axis. The relatively large free space thus formed of the D-shaped recess makes the exchangeable battery pack very accessible to the operator, which facilitates, for example, a replacement after a discharge of the exchangeable battery pack. Furthermore, there is no risk of injury to the hand holding the main handle when inserting the exchangeable battery pack. The interchangeable battery pack can be exchanged in a particularly simple manner not only when the tool is placed on one side, but also without requiring additional gripping when holding the tool in one hand. For this purpose, the operator can remove the exchangeable battery pack by pushing out the exchangeable battery pack with the aid of at least one finger of the hand holding the main handle, counter to the insertion direction, while the second hand unlocks the exchangeable battery pack by means of the unlocking button and additionally pulls it out or catches it if necessary. Furthermore, the inserted exchangeable battery pack is preferably oriented such that the charge status display on the battery pack is clearly visible to the operator of the processing appliance. Therefore, no additional display element is required in the processing tool itself.
The housing section with the opening is furthermore configured such that the inserted exchangeable battery pack is completely surrounded by the envelope of the processing tool. The envelope of the processing tool is understood in this context to mean that the envelope is covered like a closed jacket around the outer contour of the processing tool. If the inserted exchangeable battery pack is completely surrounded by the envelope, this means that no exposed parts of the battery pack protrude from the envelope. The completely enclosed insertion of the exchangeable battery pack results in very good fall protection independent of the impact of the processing tool on a preferably flat ground. Thus, the processing tool not only protects the inserted replaceable battery pack in the event of a fall or crash, but also enables quick placement or resting without the risk of damaging the replaceable battery pack.
Alternatively or additionally, the housing section with the opening has a plurality of side walls which, in combination with the electromechanical interface, form an envelope in a plane transverse to the insertion direction, which completely encloses the inserted replaceable battery pack. It is thus ensured that the inserted exchangeable battery pack is surrounded for protection by the side walls of the housing section at least over a part of its longitudinal extension, but remains accessible to the operator for better operability on insertion and removal of the side walls of the exchangeable battery pack and from the rear side thereof. Furthermore, it is provided in this context that at least two opposite side walls of the housing section along the insertion axis each cover only partially, in particular at most substantially, half the longitudinal extension of the inserted exchangeable battery pack. Thus approximately forming a kind of gripping recess that facilitates the replacement of the replaceable battery pack.
Furthermore, it can be provided that the opening opens along the insertion axis on one side, in particular toward one of the two longitudinal sides of the housing of the processing tool. Thereby achieving better accessibility to the replaceable battery pack for its replacement. The lateral opening on one side can also be closed by a door or a slide during operation, so that the door can function as a support between the main handle and the housing during operation, again being fully protected or in the event of a fall.
In a particularly preferred embodiment, the electromechanical interface for the exchangeable battery pack is arranged at a first edge region of the D-shaped recess, and the opening is arranged at the other edge region of the D-shaped recess. The side walls of the opening are thus formed directly by the electromechanical interface, whereby the exchangeable battery pack only has to be inserted to such an extent that the exchangeable battery pack protrudes, in particular with the rear side of its housing, not beyond the opening. For this purpose, it can also be provided that the first edge region and the further edge region are arranged transversely to one another, in particular substantially at right angles. The arrangement of the exchangeable battery pack in the opening can thus advantageously make it possible to visually derive the power supply device from the variant with the exchangeable battery pack inserted, since at the location of the exchangeable battery pack, preferably tool-free detachable electronics can be installed as well for converting the mains voltage into an equivalent, rectified battery voltage. Thus, a hybrid variant can be realized with a substantially unchanged appearance of the processing tool, wherein the exchangeable battery pack can be replaced by a corresponding conversion module, in particular a brushless ac conversion module (BLAC), in order to generate the required battery voltage from the mains voltage.
The housing section with the opening can be configured in such a way that it enables a movement of the main handle in the direction of the working axis, in particular a decoupling of vibrations. For this purpose, at least one side wall of the opening, which is arranged on the longitudinal side of the processing device housing, can be made of a plastic material, such as PA6GF35, ABS or an elastomer.
The insertion axis of the exchangeable battery pack particularly preferably extends transversely, in particular substantially at right angles, to the working axis of the processing tool. This enables a simplified insertion and removal of the exchangeable battery pack, since the exchangeable battery pack slides out of the electromechanical interface of the processing device by its own weight after pressing the unlocking key due to gravity when the processing device is held in normal operation. Furthermore, the processing tool can be designed to be shorter in its longitudinal extension by this arrangement. Furthermore, the processing tool thereby has a center of gravity which only slightly changes in the insertion direction when the exchangeable battery pack is inserted, whereby the processing tool provides optimal user friendliness and ergonomics for working while reducing vibrations in the working direction as well as in the insertion direction of the exchangeable battery pack.
It may also be provided that the first edge region with the electromechanical interface is arranged directly on the motor housing part of the housing. This enables a particularly small line length from the electromechanical interface to the motor electronics of the processing tool, which in turn leads to low electrical losses due to low line resistance, good signal quality and low electromagnetic interference. In combination with the motor shaft of the electric motor, which extends parallel to the insertion direction, the vibrations are thus reduced both in the direction of the working axis and in the direction of the insertion axis, which results in a correspondingly reduced load on the electromechanical interface of the processing tool or the exchangeable battery pack.
In one embodiment, it can be provided that the opening can be closed by a closure. In the closed state, the closure member causes a better protection of the inserted replaceable battery pack. Furthermore, the main handle is more robust by its more stable connection to the housing or motor housing part, since in the event of a drop or crash, possible forces acting on the main handle can be conducted to the housing or motor housing part without damage. The closure can be mounted movably on the motor housing part, for example by means of a hinge or a sliding mechanism, and can be configured as a door, a cover plate or the like.
Drawings
The invention is illustrated in the following by way of example in accordance with fig. 1 to 4, wherein like reference numerals denote like components having the same way of operation.
The drawings show:
fig. 1 is a perspective view of a first embodiment of a battery-operated working implement configured as a drill hammer, said working implement having a protective device for an inserted exchangeable battery pack,
Figure 2 is a cross-sectional view of a median plane of the drill hammer according to figure 1 extending along a working axis,
Figure 3 is a perspective view from below of a second embodiment of the protection device of the drill hammer, and
Figure 4 is a perspective side view of another embodiment of the protection device of the drill hammer.
Detailed Description
Fig. 1 shows a first exemplary embodiment of a battery-operated working device 12 configured as a drill hammer 10, which is supplied with power by a replaceable battery pack 14, and for better orientation, the coordinate crosses are indicated by the designations "h" (rear), "v" (front), "u" (lower), "o" (upper), "l" (left) and "r" (right) in all figures. However, these markings should not be construed as limiting the invention, but relate primarily to the working direction a extending along the working axis 16 of the drill hammer 10 and thus to the handling and guiding of the drill hammer 10 along the working axis 16 by an operator, in particular during a machining process.
The drill hammer 10 has a housing 18 in which a striking mechanism 20 is arranged at least in part for driving in rotation and/or striking a plug-in tool 24, for example a drill or chisel, which can be alternately received in a drill chuck 22 arranged on the front end of the drill hammer 10. The impact mechanism 20 is driven by an electric motor 26 arranged in the housing 18, which is supplied with power by an electronic unit 30 comprising power electronics and a control or regulation unit, together with a transmission 28 connected downstream thereof (see also fig. 2). The electronic unit 30 is actuated for controlling or adjusting the electric motor 26 in accordance with a main key 32 which can be actuated by the operator in such a way that a desired rotational speed and/or a desired torque of the electric motor 26 and the drill chuck 22 driven thereby can be set in accordance with the pressing stroke of the main key 32. In order to control the rotational speed and/or torque of the electric motor 26, which is designed as a brushless direct current motor (EC motor), the control or regulating unit controls the power bridge via Pulse Width Modulation (PWM) in such a way that the power bridge loads the phases of the EC motor in a known manner with trapezoidal or approximately sinusoidal commutation. The primary key 32 is disposed in a primary handle 34 of the drill hammer 10. The deeper the primary key 32 is pressed into the primary handle 34, the higher the rotational speed of the motor 26. If the primary key 32 is released, it will spring back autonomously and the motor 26 is stationary. In addition, the main key 32 may be fixed in an arbitrary position by means of a lock switch 36 on the upper end of the main handle 34. By re-pressing the lock switch 36, the main key 32 is again self-sprung back due to its spring action to stop the motor 26.
The housing 18 and the main handle 34 are each formed from two housing half-shells 38 and a handle half-shell 40 along the working axis 16. The two handle half-shells 40 are at least partially covered with soft components in order to achieve a better and more comfortable grip for the operator of the drill hammer 10. The soft component is preferably constructed as a thermoplastic elastomer (TPE). Furthermore, the main handle 34 is decoupled from the housing 18 by a damping device 42 in its upper part in order to protect the operator from excessive vibrations during long periods of operation. An optional additional grip 44 may be provided near the drill chuck 22 for better guiding the drill hammer 10. The operator can switch between different operating modes, such as drilling operation, drill hammer operation or chisel/hammer operation, by means of an operating mode selection switch 46 mounted on the upper side of the housing 18.
Fig. 2 shows a sectional view of a middle plane of the drill hammer 10 according to fig. 1, which extends along the working axis 16, wherein the middle plane extends between the connecting edges of the two half-shells 38 of the housing 18 or of the handle half-shell 40 of the main handle 34. After assembly of the drill hammer 10, the housing half-shell 38 and the handle half-shell 40 are fastened together by a plurality of threaded connections (not shown) at the connecting edges directly adjacent to one another. The main handle 34 forms a substantially D-shaped recess 48 together with the housing 18, wherein an electromechanical interface 50 is arranged in the recess 48 for the tool-free detachable reception of the exchangeable battery pack 14 or of an electromechanical interface 52 of the exchangeable battery pack complementary thereto (see fig. 1 for this). To power the drill hammer 10, the operator inserts the exchangeable battery pack 14 with its electromechanical interface 52 into the mating electromechanical interface 50 of the drill hammer 10, so that the exchangeable battery pack is autonomously locked in said mating electromechanical interface by means of the locking device 54 of the exchangeable battery pack 14. It should be noted that the general configuration of the electromechanical interfaces 50, 52 of the drill hammer 10 and the exchangeable battery pack 14, and the associated receptacles for the force-locking and/or form-locking detachable connection, should not be the subject matter of the present invention. Those skilled in the art will select the embodiment suitable for interfaces 50, 52 based on the power or voltage level of drill hammer 10 and/or replaceable battery pack 14.
The voltage level of the replaceable battery pack 14 results from the connection (parallel or series) of the individual energy storage cells 58 integrated in the housing 56 of the replaceable battery pack 14 and is typically an integer multiple (1) of the voltage of the individual energy storage cells 58. The energy storage cells 58 are typically configured as galvanic cells having a structure in which one cell pole is located on one end and the other cell pole is located on the opposite end. In particular, the energy storage cell 58 has a positive battery pole on one end and a negative battery pole on the opposite end. The energy storage cells 58 are preferably configured as lithium-based round cells, for example lithium ion cells, lithium polymer cells, lithium metal cells, etc., wherein the cell poles are arranged on the ends of a cylindrical shape. However, nickel cadmium batteries, nickel hydrogen batteries, or other suitable battery types can also be applied. In a typical lithium ion energy storage cell 58 having a cell voltage of 3.6V, for example, voltage levels of 3.6V, 7.2V, 10.8V, 14.4V, 18V, 36V, etc. are produced. However, the present invention is not dependent on the type and form of the energy storage cells 58 used, but may be applied to any replaceable battery pack 14 that uses prismatic cells, pouch cells, etc. instead of round cells. The dc voltage level is based primarily on the typical cell voltage of the energy storage cell 58 used. Thus, for example, for pouch cells and/or cells having other electrochemical components, the voltage value may be different from the voltage value of the replaceable battery pack 14 equipped with lithium ion cells. The invention will be described below by way of example with respect to a replaceable battery pack 14 having a voltage level of 18V. The charge state of the replaceable battery pack 14 is displayed by a charge state display 60, which is preferably configured as a five-bit LED segment display, disposed on a side wall of the housing 56. As the inserted exchangeable battery pack 14 is arranged according to the invention in the D-shaped recess 48, the charge status display 60 is very clearly visible to the operator, so that no additional display element is required on the drill hammer 10 itself.
In addition to the main handle 34, which is connected to the housing 18 in a vibration-decoupled manner, a pot-shaped housing 62, which surrounds at least a part of the electronics unit 30 and/or the motor 26, adjoins the housing 18 of the drill hammer 10, which itself is connected to the housing 18 in a form-locking and/or force-locking manner by means of a tongue-and-groove system. The pot-shaped housing 62 forms a structural unit together with a housing section 64, which is itself connected to the main handle 34 in a form-locking and/or force-locking manner and also serves to protect the inserted replaceable battery pack 14 from possible falls or impacts. However, it is likewise conceivable for the structural unit to consist of a pot-shaped housing 62 and a housing section 64, which is formed from two half-shells, which are themselves connected integrally or form-and/or force-locking to the housing half-shell 38 of the housing 18 and to the handle half-shell 40 of the main handle 34. Thus, the can-shaped housing 62 may also be configured as a motor housing component of the housing 18. Particularly preferably, the housing section 64 is formed onto the pot-shaped housing 62, for example, in a plastic injection molding process or the like. Alternatively, the housing section 64 can also be fixedly connected to the pot-shaped housing 62 by a force-locking connection, in particular a screw connection. The pot-shaped housing 62 and the housing section 64 are preferably made of a plastic material, such as PA6GF35, ABS and/or an elastomer. Other materials, such as metals (steel, aluminum, etc.) or material mixtures, are additionally or alternatively also conceivable. In this context, "integral" is understood to mean that the respective housing parts are not manufactured separately and subsequently assembled in a further step, but are manufactured in one piece and in a single manufacturing step. An injection molding method can also be used, in which the different materials are mixed with one another. The integrally connected housing parts can no longer be separated after production without damage, in particular at the points where the different materials adjoin one another.
The electromechanical interface 50 of the drill hammer 10 is arranged in the D-shaped recess 48 on the first edge region 66 in such a way that the replaceable battery pack 14 can be inserted into the recess 48 in the insertion direction E along an insertion axis 72 extending substantially perpendicularly to the working axis 16 through an opening 68 of a further edge region 70 of the housing section 64 arranged substantially perpendicularly to the first edge region 66. In this context "substantially perpendicular" is understood to mean that even if an exact 90 ° angle is not present due to manufacturing tolerances, a visually perpendicular impression is produced. The arrangement of the exchangeable battery pack 14 in the opening 68 thus advantageously makes it possible to visually derive the power supply device from the variant with the exchangeable battery pack 14 inserted, since, in the place of the exchangeable battery pack 14, preferably also tool-free, brushless alternating current (BLAC) electronics can be installed for converting the mains voltage into an equivalent, rectified battery voltage (not explicitly shown). In combination with the motor shaft of the electric motor 26, which extends parallel to the insertion direction E, vibrations can thus be reduced both in the direction of the working axis 24 and in the direction of the insertion axis 72, which results in a correspondingly reduced load on the electromechanical interfaces 50, 52 of the drill hammer 10 or of the interchangeable battery pack 14.
The housing section 64 with the opening 68, in combination with the housing part surrounding the D-shaped recess 48, thus forms a protection for the inserted replaceable battery pack 14, which is configured such that the inserted replaceable battery pack 14 is completely surrounded by the envelope of the drill hammer 10. For this purpose, the opening 68 is surrounded by a plurality of side walls 74 of the housing section 64, which surround the inserted exchangeable battery pack 14 at least over a part of the longitudinal extension of the exchangeable battery pack. The first edge region 66 with the electromechanical interface 50 itself thus forms one of the side walls 74 of the opening 68, so that the replaceable battery pack 14 only has to be inserted to such an extent that the replaceable battery pack does not protrude downward from the opening 68 of the housing section 64, in particular with the rear side of its housing 56 opposite the charge state display 60.
In conjunction with the electromechanical interface 50 of the drill hammer 10 arranged at the first edge region 66, an envelope 76 is formed in a plane transverse to the insertion direction E, which envelope completely encloses the inserted exchangeable battery pack 14. In a particularly advantageous manner, the housing section 64 can therefore withstand possible impacts and falls particularly well, in that it conducts impact energy into the pot-shaped housing 62, while on the other hand a high degree of vibration decoupling can be achieved by the connection to the main handle 34 via the damping device 42.
For better operability in inserting and extracting the exchangeable battery pack 14, the two side walls 74 of the opening 68 arranged on the longitudinal sides of the housing 18 cover only partially the inserted exchangeable battery pack 14 in the direction of the insertion axis 72, in particular at most substantially half the longitudinal extension of the exchangeable battery pack 14, and thus form a handle recess above the two longitudinal side walls 74 (see fig. 1). The removal of the exchangeable battery pack 14 from the electromechanical interface 50 can be particularly advantageously simplified by a spring mechanism, not shown in detail, which acts counter to the insertion direction E. The opening 68 of the further edge region 70 can be configured in such a way that it enables a decoupled movement of the main handle 34 in the direction of the working axis 16, in particular with respect to vibrations. For this purpose, the side walls 74 arranged on the longitudinal sides are preferably made of a plastic material, for example PA6GF35, ABS or an elastomer.
Fig. 3 shows the drill hammer 10 in a perspective view from below. The inserted exchangeable battery pack 14 can be unlocked or unlocked by means of an unlocking button 78 provided on the rear side of its housing 56, which, when pressed, pulls the locking device 54 into the electromechanical interface 52 of the exchangeable battery pack 14, so that the exchangeable battery pack is pushed out of the electromechanical interface 50 of the drill hammer 10, preferably with only one hand. If the operator holds the drill hammer 10 in the working position in which the working axis 16 extends largely horizontally and the insertion axis 72 extends largely vertically, the operator can remove the exchangeable battery pack 14 in that the operator assists the removal of the exchangeable battery pack 14 with at least one finger of the hand holding the grip area 80 of the main handle 34 by an additional pushing opposite to the insertion direction E, while the second hand unlocks the exchangeable battery pack 14 by the unlocking key 78 and additionally pulls out or catches the exchangeable battery pack if necessary (see fig. 1). For this purpose, the gripping region 80 of the main handle 34 is arranged completely above the inserted exchangeable battery pack 14 along the insertion axis 72 in the insertion direction E.
In the second embodiment, the opening 68 of the protection device can also be closed by a closure 82, which in the closed state provides improved protection of the inserted exchangeable battery pack 14. Furthermore, the more stable connection of the main handle 34 to the housing 18 or the pot-shaped housing 62 is then more robust, since in the event of a drop or crash, possible forces acting on the main handle 34 can be guided out into the housing 18 or the pot-shaped housing 62 without damage. The closure 82 can be mounted movably on the pot-shaped housing 62, for example, by means of a hinge or a sliding mechanism 84, and can be configured as a door, a cover plate or the like.
Fig. 4 shows a further exemplary embodiment of a battery-operated machining tool 12 in the form of a drill hammer 10 in a perspective side view. Unlike the previous embodiments, the opening 68 of the protection device is open along the insertion axis 72 towards one of the two longitudinal sides of the housing 18 of the drill hammer 10. The housing 56 of the inserted replaceable battery pack 14 is therefore no longer completely surrounded in its longitudinal direction by the side walls 74 of the housing section 64. Thereby achieving better accessibility for the replaceable battery pack 14 for its replacement. The lateral opening on one side can be closed off during operation by a door or a slide, so that the door can function as a support between the main handle 34 and the housing 18 in the event of a fall or in the event of a fall. However, this is not explicitly shown in fig. 4.
Finally, it should also be noted that the exemplary embodiments shown are not limited to the exemplary embodiments shown in fig. 1 to 4, nor to the drill hammers and the exchangeable battery pack or the values, in particular the voltage levels, which may be mentioned for the exchangeable battery pack.