Portable machine tool, in particular a drill- and / or chisel hammer

Abstract

The invention relates to a switching device for a portable machine tool, in particular a rotary hammer drill and / or chisel, comprising at least one operating mode selection unit (14) which has at least one movable, in particular rotatable, control element (16) for selecting an operating mode of the portable machine tool, and with at least one locking unit (18) for locking the control element (16) in at least one movement position of the control element (16), in particular in at least one rotation position of the control element (16). It is proposed that the locking unit (18) comprises at least one movable locking element (20) which, depending on a locking position of the locking element (20), triggers an electrical and / or electronic signal to switch an operating mode of the portable machine tool.

Description

State of the art

[0001] The invention relates to a portable machine tool, in particular a rotary hammer drill and / or chisel hammer, with a housing and at least one switching device arranged in the housing, comprising at least one operating mode selection unit, which has at least one movably, in particular rotatably, mounted control element for selecting an operating mode of the portable machine tool, and with at least one locking unit for locking the control element in at least one movement position of the control element, in particular in at least one rotation position of the control element, wherein the locking unit has at least one movably mounted locking element and a detent contour with detent recesses, wherein the locking element is movably mounted on the control element, in particular translationally, and an axis of movement of the locking element extends transversely, in particular at least substantially perpendicularly, to the axis of movement of the control element.wherein the locking element comprises at least one spring element, at least one actuating surface, and at least one locking surface which is arranged offset along the axis of movement relative to the actuating surface, wherein the locking surface, in a locking position of the locking element, engages in the at least one detent recess by means of a spring force of the spring element such that, in order to release the locking of the operating element, an operating force acting on the actuating surface opposite to the spring force is required. Such a portable machine tool is known from EP 2 481 526 A1. Disclosure of the invention

[0002] The invention relates to a portable machine tool, in particular a drill and / or chisel hammer according to claim 1, with at least one operating mode selection unit, which has at least one movably, in particular rotatably, mounted control element for selecting an operating mode of the portable machine tool, and with at least one locking unit for locking the control element in at least one movement position of the control element, in particular in at least one rotation position of the control element, in particular associated with an operating mode.The term "locking unit" shall be understood to mean, in particular, a unit comprising at least two interacting elements, especially locking elements, which are designed to interact with each other to lock the unit, in particular to be brought into contact, so that a locking force can be transmitted via the two elements to secure / hold another element in at least one movement position, in particular to prevent unintentional movement of the other element. "Designed" shall be understood to mean, in particular, specifically designed and / or specially equipped. The fact that an object is designed for a specific function shall be understood to mean, in particular, that the object fulfills and / or performs this specific function in at least one application and / or operating state.

[0003] The control element is preferably rotatably mounted about an axis of movement of the control element. The axis of movement of the control element preferably runs transversely, and in particular at least substantially perpendicularly, to a main extension axis of the portable machine tool and / or to an impact axis of an impact unit of the portable machine tool. The term "substantially perpendicular" is intended here to define in particular an orientation of a direction relative to a reference direction, wherein the direction and the reference direction, in particular when viewed in a plane, enclose an angle of 90° and the angle has a maximum deviation of in particular less than 8°, advantageously less than 5° and particularly advantageously less than 2°.The locking unit is preferably designed to lock the control element in a movement position, particularly in at least one rotational position of the control element, especially one associated with a specific operating mode. Preferably, the locking unit is designed as a detent unit. Advantageously, the locking unit comprises the locking element, which is designed as a detent element. In particular, the locking element is designed to interact with a detent recess of a detent contour of the locking unit to lock the control element in a movement position, especially in at least one rotational position of the control element, especially one associated with a specific operating mode. Preferably, the locking element is movably mounted on the control element, particularly in a translationally movable manner.The axis of movement of the locking element preferably runs transversely, and in particular at least substantially perpendicularly, to the axis of movement of the operating element. Preferably, the locking unit comprises a spring element that applies a spring force to the locking element in the direction of a locking position, in particular in a direction away from the operating element.

[0004] The locking element is preferably designed to interact with a switching element of the switching device to trigger an electrical and / or electronic signal for switching an operating mode of the portable machine tool, particularly in a locking position of the locking element associated with a chisel operation of the portable machine tool. A "locking position of the locking element" is understood to mean, in particular, a position of the locking element in which the locking element locks the operating element in a movement position of the operating element and, in particular, engages in the detent contour of the locking unit, especially in the detent recess of the detent contour. In the locking position, the locking element can interact directly with the switching element or interact with the switching element via an intermediate element, in particular an intermediate element, of the switching device.

[0005] In a preferred embodiment of the portable machine tool as a rotary hammer and / or chisel, the operating mode selection unit is provided, in particular, for selecting at least one operating mode of the portable machine tool: drilling mode, rotary hammer mode, and / or chisel mode. In drilling mode, a tool is preferably driven in a rotary manner known to those skilled in the art. In rotary hammer mode, a tool is preferably driven in a rotary and impact manner known to those skilled in the art. In chisel mode, a tool is preferably driven in an impact manner known to those skilled in the art. A rotary hammer and / or chisel belongs, in particular, to a class of devices with high drive power.To prevent so-called rotational accidents, particularly in drilling or hammer drilling operations, caused by the tool jamming due to a reaction torque acting on the portable machine tool, the portable machine tool preferably has a unit, already known to those skilled in the art, for determining the relative angle of rotation of the housing of the portable machine tool. Examples of units for determining a relative angle of rotation are described, for example, in publications WO 88 06 508 A3, DE 43 44 817 C2, EP 0 666 148 A2, and DE 196 41 618 A1. In chiseling operations, for example, the risk of unintentional rotational accidents, especially those mentioned above, is low, since the tool can only be driven by impact.In chiseling mode, certain electrical system functions of the portable power tool should preferably be set differently than in drilling and / or hammer drilling modes. In particular, an unintentional shutdown or reduction of the drive power of the portable power tool in chiseling mode due to exceeding a limit value for a rotation angle is undesirable, as this can slow down the work process. This applies especially to applications and workflows in chiseling mode where a jerky rotary movement of the portable power tool is unavoidable, for example, when chamfering edges and corners of a concrete structure, when piercing through wall openings with a chisel, and similar tasks.Advantageously, when selecting chisel operation, at least the unit for determining a relative rotation angle of a housing of the portable machine tool should be deactivated and / or individual operating parameters of the portable machine tool should be changed. Thus, reliable detection of an operating mode is advantageous to enable reliable deactivation and / or modification of operating parameters. The design according to the invention advantageously enables a safe and reliable assignment of a movement position of the control element to an operating mode of the portable machine tool, preferably to realize a reliable switching of an operating mode. It is advantageously possible to realize a reliable triggering of an electrical and / or electronic signal to switch an operating mode of the portable machine tool.

[0006] Furthermore, it is proposed that the operating mode selection unit comprises at least one intermediate element, which is movably mounted, particularly translationally, and which can be moved by the locking element to trigger an electrical and / or electronic signal for switching an operating mode of the portable machine tool, depending on a movement of the locking element into at least one locking position. Preferably, the intermediate element is movable by the locking element to trigger an electrical and / or electronic signal for switching an operating mode of the portable machine tool, depending on a movement of the locking element into at least one locking position associated with a chisel operation of the portable machine tool.In particular, the intermediate element is designed to interact directly with the switching element of the switching device, especially with an end of the intermediate element facing away from the locking element. The switching element is preferably designed as a Hall sensor. A magnetic element, in particular a permanent magnet, is preferably arranged on the intermediate element, which is designed to interact with the Hall sensor in a manner known to those skilled in the art to trigger an electrical and / or electronic signal. Alternatively, it is conceivable that the switching element is designed as an electrical switch, in particular as a microswitch, as an inductive proximity sensor, as a photoelectric barrier, or as another switching element that would appear suitable to those skilled in the art. The design according to the invention allows for a simple bridging of the gap between the locking element and the switching element.It can be advantageously arranged to position the switching element at a distance from the locking element, particularly to enable a compact arrangement of electrical and / or electronic components in an assembly that is spaced apart from the locking element within a housing of the portable machine tool. A safety distance, such as an air gap, creepage distance, or the like, can be advantageously maintained in a simple manner. It can be advantageously enabled to reliably and reliably assign a movement position of the control element to an operating mode of the portable machine tool, preferably to achieve reliable switching of an operating mode. It can also be advantageously achieved to reliably trigger an electrical and / or electronic signal to switch an operating mode of the portable machine tool.

[0007] Furthermore, it is proposed that the locking unit has at least one detent contour which interacts with the locking element to lock the control element in at least one movement position, in particular in at least one movement position associated with an operating mode, wherein at least the intermediate element engages at least partially in the detent contour in at least one state. Preferably, the intermediate element engages at least partially in a detent recess of the detent contour associated with chisel operation. Preferably, the locking element engages at least partially in the detent recess of the detent contour in a movement position of the control element associated with chisel operation and in the locking position of the locking element associated with chisel operation, in particular to lock the control element in a movement position of the control element associated with chisel operation.Preferably, the locking element moves the intermediate element, during movement into the locking position associated with chisel operation, at least partially out of the detent recess associated with chisel operation. Preferably, the detent contour is formed integrally with a housing, in particular a gearbox housing, of the portable machine tool. In particular, the detent contour is arranged below the operating element when viewed along its axis of movement. Preferably, when the operating element is positioned on the housing, in particular the gearbox housing, of the portable machine tool, the detent contour covers it, in particular along a direction that runs at least substantially parallel to the operating element's axis of movement.The term "essentially parallel" here refers in particular to an alignment of a direction relative to a reference direction, especially in a plane, wherein the direction has a deviation from the reference direction of preferably less than 8°, advantageously less than 5°, and particularly advantageously less than 2°. The design according to the invention advantageously enables reliable actuation and / or movement of the intermediate element by means of the locking element, particularly when the locking element is moved into a locking position associated with a chisel operation of the portable machine tool. It advantageously enables a secure and reliable assignment of a movement position of the operating element to an operating mode of the portable machine tool, preferably to achieve reliable switching of an operating mode.It can be advantageous to implement a safe triggering of an electrical and / or electronic signal to a circuit of an operating mode of the portable machine tool.

[0008] Furthermore, it is proposed that the operating mode selection unit comprises at least one spring element that applies a spring force to the intermediate element in the direction of the locking element. A "spring element" is understood to be, in particular, a macroscopic element that has at least an extent which, in a normal operating state, is elastically variable by at least 10%, particularly by at least 20%, preferably by at least 30%, and most advantageously by at least 50%, and which, in particular, generates a counterforce that is dependent on and preferably proportional to a change in extent and that opposes the change. The "extent" of an element is understood to be, in particular, the maximum distance between two points of a perpendicular projection of the element onto a plane.A "macroscopic element" is understood to mean, in particular, an element with a dimension of at least 1 mm, more specifically at least 5 mm, and preferably at least 10 mm. Preferably, the spring element is designed as a compression spring, more specifically as a helical compression spring. However, it is also conceivable that the spring element has another configuration that would appear advantageous to a person skilled in the art, such as a tension spring, a torsion spring, an volute spring, a leaf spring, a leg spring, or the like. The design according to the invention advantageously enables automatic return of the intermediate element. It also advantageously enables a safe and reliable assignment of a movement position of the control element to an operating mode of the portable machine tool, preferably to achieve reliable switching of an operating mode.It can be advantageous to implement a safe triggering of an electrical and / or electronic signal to a circuit of an operating mode of the portable machine tool.

[0009] Furthermore, it is proposed that the intermediate element has at least one contact surface which interacts with a corresponding contact surface of the locking element to cause movement of the intermediate element depending on movement of the locking element into at least one locking position. Preferably, the contact surface of the locking element extends transversely, and in particular at least substantially perpendicularly, to the detent surfaces of the locking element. The detent surfaces of the locking element are preferably designed to interact with edges of the detent contour that define detent recesses of the detent contour in order to lock the operating element in at least one movement position. The embodiment according to the invention advantageously allows for reliable movement of the intermediate element by means of the locking element.It can be advantageously achieved to enable a safe and reliable assignment of a movement position of the control element to an operating mode of the portable machine tool, preferably to realize a reliable switching of an operating mode. It can also be advantageously achieved to reliably trigger an electrical and / or electronic signal to switch an operating mode of the portable machine tool.

[0010] Furthermore, it is proposed that the contact surface of the intermediate element forms an angle with a movement axis of the intermediate element that deviates from 90°. Preferably, the contact surface of the intermediate element forms an angle with a movement axis of the intermediate element within a range of, in particular, 0° to 90°, preferably 10° to 70°, and most preferably 20° to 50°. The movement axis of the intermediate element preferably extends transversely, and in particular at least substantially perpendicularly, to the movement axis of the operating element. Preferably, the movement axis of the intermediate element extends at least substantially parallel to the main extension axis of the portable machine tool and / or to the impact axis of the impact unit of the portable machine tool. The design according to the invention advantageously enables reliable movement of the intermediate element by means of the locking element.It is advantageous to implement a reliable switching of an operating mode. It is advantageous to implement a safe triggering of an electrical and / or electronic signal for switching an operating mode of the portable machine tool.

[0011] Furthermore, it is proposed that the intermediate element be designed as a push rod. Preferably, the intermediate element is mounted translationally within the housing, particularly the gearbox housing, of the portable machine tool. The design according to the invention allows for simple and reliable movement of the intermediate element by means of the locking element. A reliable switching of an operating mode can advantageously be achieved. A reliable triggering of an electrical and / or electronic signal for switching an operating mode of the portable machine tool can also be advantageously achieved.

[0012] Furthermore, it is proposed that the intermediate element has at least three legs angled relative to each other, wherein at least two of the three legs are at least substantially parallel to each other. The at least two of the three legs that are at least substantially parallel to each other preferably run at least substantially parallel to the main axis of extension of the portable machine tool and / or to the impact axis of the impact unit of the portable machine tool. Preferably, one of the three legs of the intermediate element runs transversely, and in particular at least substantially perpendicularly, to the main axis of extension of the portable machine tool and / or to the impact axis of the impact unit of the portable machine tool. However, it is also conceivable that the intermediate element has a different number of legs than three, in particular legs angled relative to each other.52 By means of the embodiment according to the invention, it is advantageously possible to arrange the switching element at a distance from the locking element, in particular to enable a compact arrangement of electrical and / or electronic components in an assembly that is arranged at a distance from the locking element in a housing of the portable machine tool. A reliable switching of an operating mode can advantageously be implemented. A reliable triggering of an electrical and / or electronic signal for switching an operating mode of the portable machine tool can advantageously be implemented.

[0013] Furthermore, it is proposed that the locking element has at least one actuating surface for the application of an operator force and at least one locking surface that is offset along an axis of movement of the locking element relative to the actuating surface. Preferably, the locking surface of the locking element is arranged in a detent recess of the detent contour in a locking position of the locking element. In particular, the locking surface of the locking element forms the contact surface of the locking element, which is designed to interact with the contact surface of the intermediate element to initiate movement of the intermediate element. Preferably, the actuating surface of the locking element is offset relative to the locking surface of the locking element along a direction that runs at least substantially parallel to the axis of movement of the locking element. A compact design of the locking unit can advantageously be implemented.It is advantageous to implement a reliable switching of an operating mode. It is advantageous to implement a safe triggering of an electrical and / or electronic signal for switching an operating mode of the portable machine tool.

[0014] Furthermore, a portable machine tool, in particular a rotary hammer and / or chisel hammer, with at least one switching device according to the invention is proposed. Here, a "portable machine tool" is understood to mean, in particular, a machine tool for machining workpieces that can be transported by an operator without the need for a transport vehicle. The portable machine tool has, in particular, a mass that is less than 40 kg, preferably less than 10 kg, and most preferably less than 5 kg. The portable machine tool is preferably designed as a rotary hammer and / or chisel hammer. However, it is also conceivable that the portable machine tool has another configuration that would appear useful to a person skilled in the art, such as a jigsaw, a multi-function grinding machine, or the like. Preferably, the portable machine tool comprises at least one impact unit.The term "impact unit" is intended here to define, in particular, a unit comprising at least one component, especially the impact element, designed to generate and / or transmit an impulse, particularly an axial impact impulse, to a tool. Such a component for generating and / or transmitting an impulse can be formed, in particular, by the impact element, which may be designed, for example, as a striking pin, a striker, a piston (especially a pot piston), and / or as another component that would appear useful to a person skilled in the art. The impact element of the impact unit is preferably designed as a striking pin or striker, which advantageously forms an impact element separate from a striker of the impact unit and, in particular, comes into direct contact with the tool during operation of the drill and / or chisel hammer to transmit the impulse.Preferably, the striking unit comprises at least one further striking element, designed as a striker, which is moved within the guide element, in particular within the guide element designed as a hammer tube and / or a pot piston, to transmit a striking impulse to the striking element designed as a firing pin. Preferably, the striker is moved within the guide element to generate a striking impulse by means of pressure, in particular by means of air pressure generated by a piston guided in the guide element designed as a hammer tube. The design according to the invention advantageously enables a safe and reliable assignment of a movement position to an operating mode, preferably to achieve a reliable switching of an operating mode.It can be advantageously implemented to reliably trigger an electrical and / or electronic signal to a circuit for an operating mode of the portable machine tool. This can advantageously enable safe and reliable operation of the portable machine tool. drawing

[0015] Further advantages become apparent from the following drawing description. The drawing illustrates an embodiment of the invention. The drawing, the description, and the claims contain numerous features in combination.

[0016] They show: Fig. 1 a portable machine tool according to the invention in a schematic representation, Fig. 2 a detailed view of a switching device according to the invention of the portable machine tool according to the invention in an operating position of the switching device associated with a hammer drill operation in a schematic representation, Fig. 3 a detailed view of the switching device according to the invention of the portable machine tool according to the invention in an operating position of the switching device associated with a chisel operation in a schematic representation, Fig. 4 a sectional view of an operating element of an operating mode selection unit of the switching device according to the invention and a locking element of a locking unit of the switching device according to the invention arranged thereon in a schematic representation, Fig.Fig. 5 shows a detailed view of the locking element in a locking position associated with hammer drilling and an intermediate element of the operating mode selection unit in a state not actuated by the locking element in a schematic representation, and Fig. 6 shows a detailed view of the locking element in a locking position associated with chiseling and the intermediate element of the operating mode selection unit in a state actuated by the locking element in a schematic representation. Description of the exemplary embodiment

[0017] Figure 1Figure 1 shows a portable machine tool 12 configured as a rotary and / or chisel hammer. However, it is also conceivable that the portable machine tool 12 has a different configuration that would appear useful to a person skilled in the art, such as a drill, planer, garden machine, or the like. The portable machine tool 12 comprises, particularly in the preferred configuration as a rotary and / or chisel hammer, at least one impact unit 50. Furthermore, the portable machine tool 12 comprises a housing 52. The housing 52 preferably comprises at least one gearbox housing and at least one motor housing. The housing 52, particularly the gearbox housing, has a cup-shaped design. However, it is also conceivable that the housing 52, particularly the gearbox housing, has a shell-shaped design or a combination of a cup-shaped and a shell-shaped design.

[0018] At a front area of ​​the housing 52, which is particularly opposite a main handle 54 of the portable machine tool 12, the portable machine tool 12 includes at least one tool holder 56 for receiving an insert tool 58. The tool holder 56 can have any configuration that would be considered useful by a person skilled in the art, such as a chuck, an SDS® tool holder, an SDS® Plus tool holder, an SDS® Max tool holder, or the like. The portable machine tool 12 is further equipped with a detachable auxiliary handle 60. The auxiliary handle 60 can be detachably attached to the housing 52, in particular to the gearbox housing, by means of a snap-fit ​​connection or other connections that would be considered useful by a person skilled in the art.

[0019] The portable machine tool 12 has a drive unit 62 for generating a drive torque and an impact impulse by means of the impact unit 50. A drive torque from the drive unit 62 is transmitted to the impact unit 50 via an output unit 64 of the portable machine tool 12 in a manner known to those skilled in the art to generate an impact impulse. However, it is also conceivable that the portable machine tool 12 is decoupled from the output unit 64 and that the drive unit 62 acts essentially directly on the impact unit 50 to generate an impact impulse. An impact impulse of the impact unit 50 is generated in a manner known to those skilled in the art.Furthermore, the drive torque is transmitted via the output unit 64 to generate a rotational movement of the tool 58 via a guide element designed as a hammer tube (not shown in detail here) of the impact unit 50 and / or via a rotary drive element arranged on the tool holder 56 in a manner already known to those skilled in the art. In order to prevent so-called rotational accidents, particularly during drilling or hammer drilling operation of the portable machine tool 12, due to a blockage of the tool 58 by a reaction torque acting on the portable machine tool 12, the portable machine tool 12 preferably has a unit 66, already known to those skilled in the art, for determining a relative rotation angle of the housing 52 of the portable machine tool 12.

[0020] Furthermore, the portable machine tool 12, in particular the rotary hammer and / or chisel, comprises at least one switching device 10. The switching device 10 for the portable machine tool 12, in particular for the rotary hammer and / or chisel, comprises at least one operating mode selection unit 14, which has at least one movably, in particular rotatably, mounted control element 16 for selecting an operating mode of the portable machine tool 12. The control element 16 is movably, in particular rotatably, mounted on the housing 52. Preferably, the control element 16 is designed as a rotary knob. An axis of movement 68, in particular a rotational axis, of the control element 16 extends transversely, in particular at least substantially perpendicularly, to a main extension axis 70 of the portable machine tool 12 and / or to an impact axis 72 of the impact unit 50.The main extension axis 70 preferably extends from the main handle 54 towards the tool holder 56. The impact axis 72 of the impact unit 50 preferably extends at least substantially parallel, and in particular coaxially, to a rotation axis of the tool holder 56. It is conceivable that, in an alternative embodiment of the switching device 10 not shown in detail here, the operating element 16 is mounted for translational movement and that a movement axis 68, in particular a linear axis, of the operating element 16 runs at least substantially parallel to the main extension axis 70 of the portable machine tool 12 and / or to the impact axis 72 of the impact unit 50.

[0021] The switching device 10 further comprises at least one locking unit 18 for locking the operating element 16 in at least one movement position of the operating element 16, in particular in at least one operating mode of the portable machine tool 12 associated with the rotary position of the operating element 16 (see Figure 1 , 4 , 5 and 6 The locking unit 18 has at least one movable locking element 20 which, depending on a locking position of the locking element 20, triggers an electrical and / or electronic signal to a switching of an operating mode of the portable machine tool 12 (cf. Figures 2, 3 , 5 and 6 The locking element 20 is movably mounted on the control element 16. In particular, the locking element 20 is movably mounted on, and especially within, the control element 16 (see figure). Figures 1 to 4The operating element 16 has a bearing recess 74 in which the locking element 20 is movably mounted. An axis of movement 48 of the locking element 20 runs transversely, in particular at least substantially perpendicularly to the axis of movement 68 of the operating element 16. The locking unit 18 comprises at least one spring element 76, which exerts a spring force on the locking element 20 in a direction away from the operating element 16 (see Figure 4). The spring element 76 is in particular designed as a compression spring. However, it is also conceivable that the spring element 76 has another configuration that would appear advantageous to a person skilled in the art, such as a tension spring, a torsion spring, or the like. The spring element 76 is supported at one end on the operating element 16 and at another end on the locking element 20.The locking element 20 has a locking projection 78, which is designed to secure the locking element 20 to the operating element 16 against unintentional detachment from the operating element 16 (see . Figure 4 The locking extension 78 is designed as a detent extension that interacts with a detent projection 80 of the operating element 16. To enable the disassembly of the locking element 20 from the operating element 16, the locking extension 78 is designed to be elastically deflectable (see Figure 1). Figure 4 ).

[0022] The operating mode selection unit 14 comprises at least one intermediate element 22, which is movably mounted, in particular translationally, and which can be moved by the locking element 20 to trigger an electrical and / or electronic signal to switch an operating mode of the portable machine tool 12, depending on a movement of the locking element 20 into at least one locking position of the locking element 20 (cf. Figures 2, 3 , 5 and 6Preferably, the intermediate element 22 is movable by the locking element 20 into at least one locking position associated with a chisel operation of the portable machine tool 12, depending on a movement of the locking element 20. The intermediate element 22 is movably mounted on the housing 52, in particular on the gearbox housing, in a translationally movable manner. However, it is also conceivable that the intermediate element 22 is rotatably mounted on the housing 52, in particular on the gearbox housing, as an alternative or additional to the translationally movable mounting. An axis of movement 34 of the intermediate element 22 runs at least substantially parallel to the main extension axis 70 of the portable machine tool 12 and / or to the impact axis 72 of the impact unit 50. The axis of movement 34 of the intermediate element 22 runs transversely, in particular at least substantially perpendicularly, to the axis of movement 68 of the operating element 16.The intermediate element 22 has at least three legs 38, 40, 42 angled relative to each other, wherein at least two of the three legs 38, 40, 42 are at least substantially parallel to each other. The intermediate element 22 is preferably designed as a push rod, in particular as an angled push rod. The operating mode selection unit 14 has at least one spring element 26 that applies a spring force to the intermediate element 22 in the direction of the locking element 20. Preferably, the spring element 26 of the operating mode selection unit 14 is supported at least at one end on the intermediate element 22, and at another end the intermediate element 22 is supported on the housing 52 or on an intermediate flange (not shown in detail here) of the portable machine tool 12.

[0023] The locking unit 18 has at least one detent contour 24 which interacts with the locking element 20 to lock the operating element 16 in at least one movement position, wherein at least the intermediate element 22 engages at least partially in the detent contour 24 in at least one state, in particular in at least one detent recess 82 of the detent contour 24 associated with a chisel operation of the portable machine tool 12. The detent contour 24 is arranged on the housing 52, in particular on the gearbox housing. The detent contour 24 comprises at least three detent recesses 82, 84, 86. One detent recess 82 of the three detent recesses 82, 84, 86 is associated with a chisel operation of the portable machine tool 12. One detent recess 84 of the three detent recesses 82, 84, 86 is associated with a hammer drill operation of the portable machine tool 12.One of the three locking recesses 82, 84, 86 is assigned to a drilling operation of the portable machine tool 12.

[0024] The locking element 20 has at least one actuating surface 44 for the application of an operator force and at least one locking surface 46, which is arranged offset along the axis of movement 48 of the locking element 20 relative to the actuating surface 44. The actuating surface 44 of the locking element 20 extends, at least in an unactuated state of the locking element 20, over an outer circumference of the operating element 16. Advantageously, the locking element 20 can be conveniently actuated to release the locking of the operating element 16 and to select an operating mode of the portable machine tool 12 by a movement, in particular a rotary movement, of the operating element 16.The locking surface 46 of the locking element 20 is designed to engage, and in particular to lock, the control element 16 in at least one movement position, particularly in at least one movement position associated with an operating mode. The intermediate element 22 engages, at least partially, in the locking recess 82 of the locking contour 24 associated with a chisel operation of the portable machine tool 12 in at least one state.

[0025] When the locking surface 46 of the locking element 20 engages, in particular when it clicks into place, the intermediate element 22 can be moved at least partially out of the locking recess 82 of the locking contour 24, which is associated with a chisel operation of the portable machine tool 12 (cf. Figure 6The locking surface 46 of the locking element 20 preferably forms a contact surface 32 of the locking element 20 for movement of the intermediate element 22. The intermediate element 22 has at least one contact surface 28, 30, in particular two contact surfaces 28, 30 angled relative to each other, which interact with the corresponding contact surface 32 of the locking element 20 to move the intermediate element 22 depending on a movement of the locking element 20 into at least one locking position. The contact surface 28, 30 of the intermediate element 22 forms an angle 36 with the axis of movement 34 of the intermediate element 22 that deviates from 90°. This advantageously avoids abrupt movement of the intermediate element 22 to a large extent.It can advantageously be achieved that a smooth transition can be achieved from one position of the intermediate element 22 to another position in which a switching element 88 of the switching device 10 can be actuated by means of the intermediate element 22 (. Figures 2 and 3 ).

[0026] In particular, the intermediate element 22 is designed to interact directly with the switching element 88 of the switching device 10, especially with an end of the intermediate element 22 facing away from the locking element 20. The switching element 88 is preferably designed as a Hall sensor. A magnetic element 90, in particular a permanent magnet, is preferably arranged on the intermediate element 22, which is designed to interact with the Hall sensor in a manner known to a person skilled in the art to trigger an electrical and / or electronic signal. Alternatively, it is conceivable that the switching element 88 is designed as an electrical switch, in particular as a microswitch, as an inductive proximity sensor, as a light barrier, or as another switching element that would appear suitable to a person skilled in the art, which can be actuated by a movement of the intermediate element 22.By means of the inventive design of the switching device 10, it can advantageously be ensured that, as a result of a secure locking of the locking element 20 into the locking contour 24, a reliable triggering of an electrical and / or electronic signal to a switching of an operating mode of the portable machine tool 12 is realized.

Claims

1. Portable power tool, in particular hammer drill and / or chisel hammer, having a housing (52) and at least one switching device which is arranged in the housing (52) and has at least one operating mode selection unit (14), which has at least one movably, in particular rotatably, mounted operator control element (16) for selecting an operating mode of the portable power tool, and having at least one locking unit (18) for locking the operator control element (16) in at least one movement position of the operator control element (16), in particular in at least one rotational position of the operator control element (16), wherein the locking unit (18) has at least one movably mounted locking element (20) and a latching contour (24), which is positioned on the housing (52), in particular on a transmission housing, of the portable power tool and has at least three latching recesses (82, 84, 86), wherein the locking element (20) is mounted movably, in particular translationally, on the operator control element (16) and a movement axis (48) of the locking element (20) runs transversely, in particular at least substantially perpendicularly, to the movement axis (68) of the operator control element (16), wherein the locking element (20) has at least one spring element (76), at least one actuating surface (44) and at least one locking surface (46), which is offset along the movement axis (48) relative to the actuating surface (44), wherein, in a locking position of the locking element (20), the locking surface (46) engages by means of a spring force of the spring element (76) in the at least one latching recess (82, 84, 86) in such a way that, in order to release the locking of the operator control element (16), an action of an operator control force on the actuating surface (44) counter to the spring force is required, wherein the locking surface (46) forms a contact surface (32), which, when the locking element (20) engages in the at least one latching recess (82), triggers an electrical and / or electronic signal for switching the operating mode of the portable power tool.

2. Portable power tool according to Claim 1, characterized in that, for triggering the electrical and / or electronic signal, the operating mode selection unit (14) has at least one movably, in particular translationally, mounted intermediate element (22), which engages in the at least one latching recess (82, 84, 86) and which is movable by the contact surface (32) in the at least one locking position of the locking element (20).

3. Portable power tool according to Claim 2, characterized in that the operating mode selection unit (14) has at least one spring element (26), which applies a spring force to the intermediate element (22) in the direction of the locking element (20).

4. Portable power tool according to either of Claims 2 and 3, characterized in that the intermediate element (22) has at least one contact surface (28, 30), which interacts with the contact surface (32) of the locking element (20) to produce a movement of the intermediate element (22) depending on a movement of the locking element (20) into the at least one locking position of the locking element (20).

5. Portable power tool according to any one of Claims 2 to 4, characterized in that the contact surface (28, 30) of the intermediate element (22) encloses an angle (36) differing from 90° with a movement axis (34) of the intermediate element (22).

6. Portable power tool according to one of Claims 2 to 5, characterized in that the intermediate element (22) is in the form of a push rod.

7. Portable power tool according to any one of Claims 2 to 6, characterized in that the intermediate element (22) has at least three limbs (38, 40, 42) which are angled relative to each other, at least two of the three limbs (38, 40, 42) running at least substantially parallel to each other.

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