Clamping unit, battery device, hand-held power tool and hand-held power tool system

Abstract

A clamping unit for clamping a battery device on a handheld power tool comprises a clamping element for clamping the battery device and a rotatably mounted actuating element configured to move the clamping element from a released state to a clamped state of the clamping unit. According to the present invention, the actuating element is configured to move the clamping element from the released state to the clamped state by means of a rotational movement, in particular an eccentric movement. The present invention also relates to a corresponding battery device, a handheld power tool, and a handheld power tool system.

Description

Technical Field

[0001] The invention relates to a clamping unit for clamping a battery device. Background Art

[0002] DE 10 2015 226 423 A1 is based on a handheld power tool, in particular a drill and / or chisel hammer, having at least one battery and at least one battery interface for mechanically receiving the battery. The handheld power tool has at least one active clamping unit that is configured to clamp the battery in or on the battery interface in an operating position. Summary of the Invention

[0003] The object of the present invention is to improve the clamping unit using simple structural measures.

[0004] This object is achieved by a clamping unit for clamping a battery device on a handheld power tool, which has a clamping element for clamping the battery device and a rotatably mounted actuating element provided for moving the clamping element from a released state to a clamped state of the clamping unit.

[0005] According to the invention, the actuating element is provided for moving the clamping element from a released state into a clamped state by means of a rotational movement, in particular an eccentric movement.

[0006] The battery device can thus be connected to the handheld power tool in a particularly advantageous manner by being clamped to the handheld power tool via the operating element. This allows the battery device to be clamped to the handheld power tool in a particularly secure and gap-free manner. This clamping ensures that, even when using a heavy battery device, the battery device does not become loose from the handheld power tool or experience significant wear due to gaps or vibrations. In particular, the clamping element is configured to move relative to the battery device in order to apply a clamping force to the battery device and clamp the battery device in or on the clamping unit.

[0007] In particular, hammer drills / electric hammers are used for rock processing and have high impact energy to locally break and fracture the rock being processed. This high impact energy not only causes high vibration loads, particularly on movably supported or interspaced components of the hammer drill, but also can cause the broken rock to become airborne, particularly as drilling dust, and fall onto movably supported or interspaced components, such as battery devices and handheld power tools, and can have a particularly abrasive effect on mechanical and electrical contacts.

[0008] The rotational movement can be implemented as an eccentric movement, for example, by means of a circular eccentric drive. The rotational movement can be implemented, for example, by means of a toggle lever drive. Thus, the drive can be used to amplify the force in order to bring the clamping unit from the relaxed state into the clamped state.

[0009] In this context, a clamping element is to be understood as an element which, in at least one clamped state, has a form-fitting connection with the battery device in at least one direction and is provided for holding the battery device in the clamped state with a force-fitting connection. In addition to the force-fitting connection, the battery device may also have a form-fitting connection in other directions.

[0010] The clamping element may be arranged on the handheld power tool. The clamping element may be arranged on the battery device. The clamping element may be clamped relative to the battery unit by means of a transmission device and, in particular, may be in a clamped state. The clamping element may directly contact the battery device. The clamping element may be configured to hold the battery device on the handheld power tool, at least in the clamped state. The clamping element may be configured to project into the battery device, in particular, into a receiving area of the battery device, at least in the clamped state.

[0011] An operating element is to be understood in particular as an element which is provided for receiving an input from an operator during an operating process and which is in particular directly contacted by the operator, wherein a touch on the operating element is detected and / or an operating force applied to the operating element is detected and / or mechanically transmitted for operating a unit.

[0012] A clamped state is understood to mean a state in which the clamping element clamps the rechargeable battery device relative to the handheld power tool by, for example, pressing the rechargeable battery device against the handheld power tool.

[0013] A relaxed state is to be understood as meaning a state in which the clamping element supports the rechargeable battery device relative to the handheld power tool in such a way that the rechargeable battery device is not clamped relative to the handheld power tool or has a gap.

[0014] The present invention further proposes advantageous embodiments of the battery device according to the invention.

[0015] It may be expedient for the clamping element to be provided for holding the rechargeable battery device in a positively and / or non-positively locking manner in a clamped state on a clamping unit, in particular a handheld power tool.

[0016] In particular, the battery device may have a battery slot that is configured to receive a clamping element in at least a clamped state and, for example, connect it in a force-locking and, optionally, form-locking manner. Preferably, the clamping element has a shape corresponding to, or a negative shape of, the battery slot. The clamping element may be arranged in the clamping unit such that it can be connected to the battery slot in the received state. The received state should reflect the complete insertion of the battery device, in which case the battery device is connected to the clamping device and / or the handheld power tool such that, for example, electrical contact is established between the battery device and the handheld power tool. The clamping element may be configured to clamp the battery device in the received state. The clamping element may be configured to act in a direction opposite to the direction of ejection of the battery device in the received state. This ensures in a particularly reliable manner that the battery device can also be released when it is not clamped too tightly.

[0017] The force connection ensures a particularly continuous and play-free clamping, while the form connection facilitates the connection of the battery device to the handheld power tool, so that loads exceeding the clamping force, for example if the power tool is dropped, can also be reliably absorbed.

[0018] It is also expedient if the clamping element is supported so as to be translatably movable, in particular on the machine housing of the handheld power tool. In particular, the clamping element is supported so as to be translatably movable by means of at least one elongated hole. This provides a particularly simple and reliable support.

[0019] It may also be expedient for the clamping element to be prestressed relative to the actuating element in the clamped and / or relaxed state by means of a spring element, in particular a bending spring, preferably a leaf spring. The spring element may be configured as a compression spring. The spring element may have a spring tongue that is more relaxed in the relaxed state of the clamping element than in the clamped state. The spring element may have a fixed end. The spring element may have a loose end. The loose end may be arranged on the side of the spring element facing away from the fixed end. The spring element, in particular the loose end, may have a stop element. The stop element may stop or abut against the clamping element in a state between the relaxed and clamped state. This may increase the spring constant by having the spring element, in particular the loose end of the spring element, abut against and support the clamping element. The spring element may have a progressive spring force increase. The progressive spring force increase is preferably achieved by bringing the spring element into abutment on both sides after a slight deflection. A progressive spring force increase has a particular advantage: within the favorable force transmission ratio of the circular eccentric, a higher spring force occurs closer to the dead center. This allows for low actuation forces while simultaneously exerting high forces on the clamping unit. The clamping element can directly follow the transmission's stroke movement for 20% to 40% and enter the spring element's preload from 60% to 80%. In particular, the spring element's elastic properties can be adapted to the transmission's characteristics. For example, the spring element can thus have maximum stiffness in the region of maximum force transmission ratio.

[0020] It may also be expedient for the clamping element to be L-shaped and to have a clamping continuation. In particular, the clamping continuation delimits the clamping element. Preferably, the clamping continuation is arranged in a guide notch of the battery device when the battery device is in the received state and is, in particular, completely surrounded by the guide notch. The clamping continuation may be arranged on the side of the clamping element facing away from the spring element. The clamping continuation may be arranged between the actuating element and the spring element. The clamping slide is preferably designed as a bent sheet metal stamping part. This allows for a particularly compact design of the clamping unit.

[0021] It is further proposed that the / the clamping extension has a clamping projection. The clamping projection can be convex. The clamping projection can be configured to engage in a concave clamping recess of the battery device in the received state. This ensures, in a particularly simple manner, that the battery device is installed without play in the received state.

[0022] It is further proposed that the / the clamping extension at least partially constitutes a guide element, in particular a guide rail, for guiding the battery device. The guide rail can be configured to engage with a guide element of the battery device, which is configured as a guide groove. The guide rail preferably extends in the insertion direction of the battery device. The clamping extension can extend perpendicular to the clamping direction. The clamping element can be bent around the guide rail of the battery device. This allows for a particularly compact clamping unit.

[0023] It is further proposed that the / the clamping extension is arranged in a groove of the / the guide rail. The clamping extension is at least substantially surrounded by the guide rail groove. The clamping extension is movably mounted in the guide rail groove, in particular movably mounted perpendicularly to the insertion direction of the battery device. This allows for a particularly compact arrangement of the clamping element.

[0024] It may be expedient for the / the clamping extension to be provided to increase the extent of the / the guide rail in the clamped state of the battery device, in particular transversely to the receiving direction, thereby making it possible to enlarge the guide rail at least partially in the clamped state.

[0025] It is also expedient for the operating element to have an eccentric disk having a latching element, in particular configured as a latching projection, which is provided for clamping or latching with a latching element, in particular configured as a latching recess, of the clamping element, in particular in the clamped state. The latching element is provided to lock the clamping unit in the clamped state. The latching projection can be configured as a latching nose. The latching projection can define the outer contour of the operating element. The latching recess can be configured as the negative of the latching projection. The latching recess is preferably configured as a latching notch. This allows the operator of the clamping unit to confirm in a particularly simple manner whether the clamping unit is locked.

[0026] It can also be expedient for the actuating element to include an actuating lever that extends radially, in particular relative to the eccentric axis, and at least partially surrounds the battery device, in particular the battery interface of the battery device, in the clamped state. The actuating lever and the integrated circular eccentric disk are advantageously designed as a one-piece plastic injection-molded part. This allows the battery device to be protected from impacts in a particularly simple manner by the actuating element absorbing a large portion of the impact energy.

[0027] The present invention further relates to a battery device having a locking unit and the aforementioned clamping unit, the locking unit being used to lock the battery device to a handheld power tool, the locking unit having a locking element, in particular a snap-on element.

[0028] The present invention further relates to a handheld power tool, in particular a drill hammer or a chiseling hammer, having a receiving unit designed as a receiving rail and the aforementioned clamping unit, the receiving unit being used to releasably receive a rechargeable battery device.

[0029] The present invention relates to a handheld power tool system comprising a handheld power tool and a battery device. The handheld power tool system comprises a clamping unit and a locking unit for locking the battery device on the handheld power tool.

[0030] It may be advantageous for the locking unit to have an unlocking element, in particular an unlocking button, which is provided for unlocking the locking unit, wherein the unlocking element is enclosed by the actuating element in the clamped state. In particular, the actuating element covers the unlocking element in the clamped state of the clamping device. This ensures a clear unlocking sequence for the user.

[0031] The battery device may include a locking unit. The locking unit may be configured to lock the battery device to the handheld power tool so that the battery device is retained on the handheld power tool. The locking device may be disposed on the handheld power tool. The locking device may be disposed on the battery device. The locking unit may form a positive-locking connection between the battery device and the handheld power tool. To ensure a seamless connection between the battery device and the handheld power tool, a clamping unit may be provided in addition to the locking unit. These two units (the locking unit and the clamping unit) cooperate to provide a significantly easier connection between the battery device and the handheld power tool.

[0032] The locking unit can be configured as a clip arrangement or as a pawl arrangement.

[0033] Furthermore, a clamping device is preferably understood to mean a device that preferably acts against a spring force. The clamping device preferably has a first, clamped, operating state or a second, unclamped or partially clamped, operating state. The clamping device is preferably in the unclamped or clamped state when no tool device is received on the handheld power tool. Furthermore, when a tool device is received on the handheld power tool, the clamping device is in the unclamped or partially clamped state and preferably indirectly or directly establishes a positive-locking connection between the tool device and the handheld power tool.

[0034] Furthermore, a latch device is preferably understood to be a device which prevents a movement of the tool device relative to the handheld power tool in at least one direction by means of a positive connection via at least one or preferably a plurality of latch elements, wherein the latch elements are movably mounted.

[0035] It may be advantageous for the locking unit to have an unlocking element, in particular an unlocking button, which is provided for unlocking the locking unit, wherein the unlocking element is enclosed by the actuating element in the clamped state. In particular, the actuating element covers the unlocking element in the clamped state of the clamping device. This ensures a clear unlocking sequence for the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Further advantages can be derived from the following description of the drawings. The drawings illustrate exemplary embodiments of the present invention. The drawings, the description, and the claims contain a number of feature combinations. A person skilled in the art can appropriately consider these features individually and combine them into other meaningful combinations. Here, the following is shown:

[0037] Figure 1 A perspective view of a handheld power tool and a battery device.

[0038] Figure 2 Figure 1 Cross-section of a handheld power tool and a battery unit,

[0039] Figure 3 Figure 1 Another cross section of a handheld power tool and a battery device, and

[0040] Figure 4 and 5 Figure 1 Another cross section of a handheld power tool and a battery device. DETAILED DESCRIPTION

[0041] In the following figures, identical components are provided with the same reference numerals.

[0042] Figure 1 A handheld power tool 10 is shown. In the illustrated embodiment, the handheld power tool 10 is configured as a chisel hammer drill. However, it is also conceivable that the handheld power tool 10 has other configurations deemed appropriate by those skilled in the art, such as an electric drill, grinder, gardening tool, electric pick, or the like. The handheld power tool 10 has a housing 20. A handle 30 of the handheld power tool 10 is arranged on the housing 20. The handle 30 is designed to damp vibration relative to the housing 20. A vibration damping unit 32 is arranged between the housing 20 and the handle 30. The handheld power tool 10 also has a drive unit (not shown in detail) and an impact mechanism (not shown in detail). The drive unit and the impact mechanism are arranged in the housing 20 and are surrounded by the housing 20. The handheld power tool 10 also has a tool receptacle 24. The tool receptacle 24 is arranged on the side of the housing 20 opposite the handle 30. The tool receptacle 24 is configured as a quick-change tool receptacle. The tool receptacle 24 is provided for receiving a quick-change tool (not shown in detail). The tool receiver 24 is designed as an SDS tool receiver, for example, an SDS Max tool receiver. The tool receiver 24 is provided for receiving quick-change tools with a shank diameter greater than 10 mm. These quick-change tools are drill bits. The tool receiver 24 also has an axis of rotation 28. During operation, the axis of rotation 28 corresponds to the axis of rotation of the tool receiver 24 and extends substantially parallel to the main extension direction of the handheld power tool 10.

[0043] The handle 30 is arranged on the side of the housing 20 facing away from the working area of the handheld power tool 10. The handle 30 is provided to guide the handheld power tool 10 and to transmit forces from the operator to the handheld power tool 10. The handheld power tool 10 also has a detachable additional handle 40 in addition to the handle 30. The additional handle 40 can be detachably fastened to the housing 20 of the handheld power tool 10, in particular in the vicinity of the tool receptacle 24, by a latching connection or another connection deemed appropriate by a person skilled in the art.

[0044] The drive unit of the handheld power tool 10 is configured to generate a drive torque and to generate an impact impulse by means of a hammer mechanism and is designed as an electric motor. The drive torque of the drive unit can be transmitted via an output unit (not shown in further detail) of the handheld power tool 10, at least for generating the impact impulse of the hammer mechanism. The impact impulse of the hammer mechanism can be generated in a manner known to those skilled in the art. The drive torque for generating the rotational movement of the quick-change tool is transmitted to the tool receiver 24 via the output unit via a guide element (not shown in further detail) of the hammer mechanism and / or via a rotary driver element (not shown in further detail) of the hammer mechanism, arranged on the tool receiver 24, in a manner known to those skilled in the art.

[0045] The handheld power tool 10 further includes a battery device 16. The battery device 16 is formed by a battery pack. The battery device 16 is formed by a lithium-ion battery pack. The battery device 16 preferably includes a plurality of battery cells.

[0046] An interface unit 12 is also provided. The interface unit 12 has a mechanical interface 13a assigned to the handheld power tool and a battery interface 13b assigned to the battery device 16. The mechanical interface 13a is arranged in the central region of the handheld power tool 10. The interface unit 12 is configured to mechanically receive the battery device 16. The battery device 16 is configured to be received in the mechanical interface 12 or coupled to the mechanical interface, particularly via the battery interface 12. The battery device 16 can be received in a manner that allows it to be releasably coupled to the handheld power tool via the interface unit 12. Each interface unit 12 also has an electrical contact unit for electrically contacting the battery device 16 received therein. The electrical contact unit has a plurality of electrical contacts. The battery device 16 also has an electrical contact unit for electrically contacting the battery device 16. The electrical contact unit of the battery device 16 also has a plurality of electrical contacts. Energy can be transferred from the battery device 16 to the battery interface 12 via the contact unit.

[0047] The mechanical interface 13a includes a machine guide unit 15. The machine guide unit 15 includes a guide protrusion 15a and a guide groove 15b. The guide protrusion 15a is configured as a guide rail and is provided for guiding the battery device 16 on the handheld power tool 10. The machine guide unit 15b has two opposing guide protrusions 15a. The guide protrusions 15a are arranged parallel to each other. In this embodiment, the guide protrusions 15a are oriented substantially parallel to the rotation axis 28 of the tool receptacle 24. The guide protrusions 15a define a receiving plane for receiving the battery device 16 in the battery interface 12. The guide groove 15b is bounded by the guide protrusions 15a. The guide groove 15b is provided for receiving a portion of the battery device 16 and for positively locking the battery device on the handheld power tool 10 by means of the guide protrusions 15a. The guide unit 14a delimits the handheld power tool 10 at least in sections. The guide protrusions 15a extend parallel to the receiving plane.

[0048] The battery interface 13b has a battery guide unit 17. The battery guide unit 17 is constructed essentially similarly to the machine guide unit 15. The battery guide unit 17 includes a guide projection 17a and a guide slot 17b. The guide projection 17a is designed as a guide rail and is provided to guide the battery device 16 in the battery interface 16b. The battery guide unit 17 has two guide projections 17a pointing away from each other. The guide projections 17a are arranged parallel to each other. The guide projections 17a are configured to engage with the guide slots 17b of the machine guide unit 15 and slide along or be held by the guide projections 15a of the machine guide unit 15 in a form-fitting manner. The guide unit 17 at least partially delimits the battery device 16.

[0049] The battery interface 12 is preferably designed as a groove and tongue connection, by means of which the battery device 16 is received in the handheld power tool 10 .

[0050] The handheld power tool according to the present invention has a clamping unit 90 for clamping a battery device on the handheld power tool. The clamping unit 90 has a clamping element 92 for clamping the battery device and a rotatably mounted operating element that is provided for moving the clamping element 92 from a released state of the clamping unit 90 into a clamped state.

[0051] The operating element is provided for placing the clamping element 92 from a loose state into a clamped state by means of an eccentric rotational movement. The rotational movement is configured as an eccentric movement by means of a circular eccentric transmission ( Figure 2 ). The circular eccentric drive can thus be used to increase the force in order to bring the clamping unit 90 from the relaxed state into the clamped state.

[0052] The battery device 16 has a locking unit 40 with a locking element 76, which is provided for locking onto a locking recess of the handheld power tool 10. The locking element 76 is designed as a spring-loaded snap-on element and is provided for locking the battery device 16 in a received state when it is received or inserted into the handheld power tool 10.

[0053] The locking unit 40 is configured as a snap-on or clip unit that is preferably pivotable against spring force. The snap-on unit preferably has a first, clamped operating state and a second, unclamped or partially clamped operating state. The snap-on unit is preferably in the unclamped or partially clamped state when no battery device 16 is received in the handheld power tool 10. The locking unit 40 serves to secure the battery device 16 to the handheld power tool 10.

[0054] The locking unit 40 has an unlocking element configured as an unlocking button, which is provided for unlocking the locking unit 40. In the clamped state, the unlocking button is surrounded by an actuating element 54. The unlocking button is arranged on the battery device 16 and is provided for unlocking the battery device 16 from the handheld power tool 10. The actuating element 54 covers the unlocking element in the clamped state of the clamping unit 90, so that an operator of the handheld power tool 10 cannot actuate the unlocking button of the battery device 16, in particular without moving the actuating element 54 to the released state. The locking unit 40 forms a positive-locking connection between the battery device 16 and the handheld power tool 10.

[0055] The handheld power tool 10 and the rechargeable battery device 16 form a handheld power tool system having a clamping unit 90 and a locking unit 40 .

[0056] The clamping element 92 is arranged on the handheld power tool 10. The clamping element 92 is clamped relative to the battery device 16 by means of a circular eccentric drive and forms a clamped state. The clamping element 92 directly contacts the battery device 16. The clamping element 92 is configured to hold the battery device 16 on the handheld power tool 10, at least in the clamped state. The clamping element 92 is configured to project into the battery device 16, at least in the clamped state, and to hold the battery device 16 on the handheld power tool 10 in a form-fitting and force-fitting manner. The clamping element 92 is supported on the machine housing of the handheld power tool 10 for translational movement by means of an elongated hole 98.

[0057] The clamping element 92 is prestressed relative to the operating element 54 in the clamped state and / or the relaxed state by means of a spring element configured as a bending spring. The spring element is configured as a compression spring. The spring element has a spring tongue that is more relaxed in the relaxed state of the clamping element 92 than in the clamped state. The spring element has a fixed end 60 and a loose end 62, wherein the loose end 62 is arranged on the side of the spring element 58 facing away from the fixed end 60. The loose end 62 has a stop element that stops or abuts against the clamping element 92 in a state between the relaxed state and the clamped state. This increases the spring constant by causing the loose end 62 of the spring element 58 to abut against the clamping element 92 and be supported on the clamping element 92. The bending spring has a progressive spring force increase (not shown in detail) that is generated by causing the spring element 58 to abut on both sides after a slight deflection. The progressive spring force increase has the following advantages: Within the favorable force transmission ratio of the circular eccentric, a higher spring force occurs closer to the dead center. This allows for low actuation forces while simultaneously exerting high forces on the clamping unit 90. The clamping element 92 can directly follow 30% of the transmission's stroke movement, while 70% is devoted to the preload of the spring element 58. The spring characteristics of the bending spring are adapted to the transmission's characteristics.

[0058] The clamping element 92 is L-shaped and has a clamping extension 94. The clamping extension 94 delimits the clamping element 92. When the battery device 16 is in the received state, the clamping extension 94 is arranged in the guide groove 17b of the battery device 16 and is substantially completely surrounded thereby. The clamping extension 94 is arranged on the side of the clamping element 92 facing away from the spring element 58. The clamping extension 94 is arranged between the actuating element 54 and the spring element 58. The clamping element 92 is embodied as a stamped and bent sheet metal part. The clamping extension 94 has a convex clamping projection 96. The clamping projection 96 is configured to engage in a concave clamping groove 97 of the battery device 16, in particular, of the guide projection 17a, in the received state. The clamping extension 94b at least partially constitutes a guide element configured as the guide projection 15a for guiding the battery device 16. The guide projection 15a is configured to engage with a guide element 17b of the battery device 16, which is configured as a guide groove. The guide projection 15a preferably extends in the receiving direction 86 of the battery device 16. The clamping extension 94 extends perpendicularly to the receiving direction 86. In the received state, the clamping element 92 is bent around the guide projection 17a of the battery device 16 and at least partially forms a guide rail. The clamping extension 94 is arranged in a support groove 99 of the guide projection 15a. The clamping extension 94 is at least substantially surrounded by the guide projection 15b. The clamping extension 94 is movably supported in the support groove 99 of the guide projection 15b perpendicularly to the receiving direction 86 of the battery device 16. The clamping extension 94 is configured to increase or widen the extension of the guide projection 15b in the clamped state, perpendicularly to the receiving direction, so that the battery device 16 can be clamped in the guide groove 17b of the battery device 16 by means of the clamping extension 94.

[0059] The battery device 16 has a battery slot that is configured to receive a clamping extension 94 in at least a clamped state and connect it in a force-locking and form-locking manner. The clamping extension 94 has a shape corresponding to, or in other words, a negative shape, of the battery slot. The clamping element 92 is arranged in the clamping unit 90 such that the clamping extension 94 can connect to the battery slot in the received state. The received state is intended to reflect the complete insertion of the battery device 16. When fully inserted, the battery device 16 is connected to the handheld power tool 10 such that electrical contact is established between the battery device 16 and the handheld power tool 10. The clamping element 92, in particular the clamping extension 94, is configured to clamp the battery device 16 in the received state. The clamping element 92 is configured to act in a form-locking and / or force-locking manner against the direction of ejection of the battery device 16 in the plugged-in state. The clamping extension 94 is provided for clamping the rechargeable battery device 16 in a force-fitting manner, so that the rechargeable battery device 16 is clamped to the handheld power tool 10 without any gaps.

[0060] The actuating element 54 has an eccentric disk 72 having a latching element 74 configured as a latching projection. The latching element 74 is provided for clamping with a latching element 76 configured as a latching recess of the clamping element 92 in the clamped state. The latching element 74 is provided to enable locking of the clamping unit 90 in the clamped state. The latching projection 74 is configured as a latching nose that defines the outer contour of the actuating element 54. The latching recess 76 is configured as the negative of the latching projection 74. The latching recess 76 is configured as a latching notch.

[0061] The operating element 54 has an operating lever 78, which extends radially relative to the eccentric axis and, in the clamped state, at least partially surrounds the battery device 16 and the battery interface of the battery device 16. At least in the clamped state of the battery device 16, the operating lever 78 covers the unlocking button 80 so that in order to release the battery device 16, the operator must release the operating lever 78 before the operator can actuate the unlocking button 80.

Claims

1. A clamping unit for clamping a battery device (16) on a handheld power tool (10), the clamping unit comprising: - a clamping element (92) for clamping the battery device (16), wherein The clamping element (92) is arranged on a machine housing of the handheld power tool (10); and, a rotatably mounted actuating element (54) which is provided for moving the clamping element (92) from a released state into a clamped state of the clamping unit (90), The invention is characterized in that the actuating element (54) is provided for moving the clamping element (92) from a released state into a clamped state by means of a rotational movement. The battery device (16) has a locking unit (40) for locking the battery device (16) to the handheld power tool (10), the locking unit (40) having a locking element (76), wherein the locking unit (40) has an unlocking element (80) for unlocking the locking unit (40).

2. The clamping unit according to claim 1, characterized in that The clamping element (92) is provided for holding the rechargeable battery device (16) on the clamping unit (90) in a positively locking and / or non-positively locking manner in a clamped state.

3. The clamping unit according to claim 1 or 2, characterized in that The clamping element (92) is mounted so as to be translatably movable.

4. The clamping unit according to claim 1 or 2, characterized in that The clamping element (92) is prestressed relative to the actuating element (54) in a clamped state and / or a released state by means of a spring element (58), the spring element having a spring tongue integrated into the clamping element (92), the spring tongue having a fixed end (60) and a loose end (62) on a side facing away from the fixed end (60).

5. The clamping unit according to claim 1 or 2, characterized in that The clamping unit is arranged on a handheld power tool, the clamping element (92) is constructed in an L-shape, and one side of the L-shape forms a clamping extension (94), the clamping extension (94) at least partially constituting a guide element constructed as a guide rail for guiding the battery device, so that the clamping extension (94) is arranged in a guide groove (17b) of the battery device (16) when the battery device (16) is received.

6. The clamping unit according to claim 5, characterized in that The clamping extension (94) has a clamping projection (96).

7. The clamping unit according to claim 1 or 2, characterized in that The clamping element (92) is mounted so as to be movable perpendicular to a receiving direction (86) of the battery device (16).

8. The clamping unit according to claim 5, characterized in that The clamping extension (94) is arranged in the groove of the guide rail.

9. The clamping unit according to claim 5, characterized in that The clamping extension (94) is provided for increasing the extent of the guide rail in a clamped state of the battery device (16) transversely to a receiving direction (86) of the battery device (16).

10. The clamping unit according to claim 1 or 2, characterized in that The actuating element (54) has an eccentric disk (72) having a latching element (74), the latching element of the eccentric disk being provided for latching with a latching element of the clamping element (92) in a clamped state. The locking element of the eccentric disk is configured as a locking projection. The latching element of the clamping element is designed as a latching recess.

11. The clamping unit according to claim 1 or 2, characterized in that The actuating element (54) has an actuating lever (78) which extends radially relative to the eccentric axis and at least partially surrounds a battery interface of the battery device (16) in a clamped state.

12. The clamping unit according to claim 1 or 2, characterized in that The actuating element (54) is provided for moving the clamping element (92) from a released state into a clamped state by means of an eccentric movement.

13. The clamping unit according to claim 4, characterized in that The spring element is a bending spring.

14. The clamping unit according to claim 4, characterized in that The spring element is a leaf spring.

15. A handheld power tool having a receiving unit designed as a receiving rail for releasably receiving a rechargeable battery device (16) and a clamping unit (90) according to claim 1.

16. The handheld power tool according to claim 15, characterized in that The machine tool is a hammer drill.

17. A handheld power tool system comprising a handheld power tool (10) and a battery device (16), characterized in that: A clamping unit (90) according to any one of claims 1 to 14 and a locking unit (40) for locking a battery device (16) to a handheld power tool (10) are provided.

18. The handheld power tool system according to claim 17, characterized in that The unlocking element (80) is surrounded by the actuating element (54) in the clamped state; the unlocking element (80) is an unlocking button.

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