Hand grip device for handheld machine tools

Abstract

The present invention provides a handgrip device (40) for detachably mounting on a handheld machine tool (10), the handgrip device having a clamping ring (41) having a clamping receiving portion (42) for receiving a mounting section (20) of the handheld machine tool (10), and a handgrip (60) protruding from the clamping ring (41), the clamping receiving portion (42) being adapted to be fitted tightly to the mounting section of the handheld machine tool (10) by an operator (BE) using a clamping operation handle (78) that can be manually operated by the operator (BE). The hand grip device is adjustable between a clamping position (K) in which the mounting section of the hand-held machine tool (10) is clamped and a release position (L) in which the mounting section of the hand-held machine tool (10) is released and the mounting section of the hand-held machine tool (10) can be inserted into the clamping receptacle (42) along an insertion axis (S). The hand grip device comprises an axial form coupling body (80) movably supported relative to the clamping receptacle (42) and having an axial form coupling contour (81) for engagement with a mating axial form coupling contour (25) of the mounting section of the hand-held machine tool. It is contemplated that the hand grip device has a form-coupling operating handle (90) separate from and manually operable by an operator (BE) independently of the tightening operating handle (78) to adjust the axial form-coupling body (80) between an engaged position in which the axial form-coupling contour (81) engages with the mating axial form-coupling contour (25) and a released position in which the axial form-coupling contour is disengaged from the mating axial form-coupling contour.

Description

[Technical Field]

[0001] The present invention relates to a handgrip device for detachable mounting on a hand-held machine tool, in particular a drilling or screwdriving machine, the handgrip device having a clamping ring with a clamping receptacle for receiving a mounting section, in particular a machine neck, of the hand-held machine tool, and a handgrip protruding from the clamping ring and configured for gripping and / or holding by an operator, the clamping receptacle being adjustable by a clamping operating handle manually operable by the operator between a clamping position for clamping the mounting section of the hand-held machine tool, in which the inner circumferential surface of the clamping receptacle abuts the mounting section of the hand-held machine tool with an interference fit, and a release position for releasing the mounting section of the hand-held machine tool, in which the mounting section of the hand-held machine tool can be inserted into the clamping receptacle along an insertion axis, the handgrip device having an axial form-fitting body movably supported relative to the clamping receptacle, the axial form-fitting body having an axial form-fitting contour for engagement with a mating axial form-fitting contour of the mounting section of the hand-held machine tool. [Background technology]

[0002] A handgrip device of this type is described, for example, in German Patent Application No. DE 3829801 A1. The handgrip device comprises a sleeve with a so-called arresting projection as an axial form-locking profile that engages in a groove in the spindle neck of a hand-held machine tool by adjusting the clamping receptacle to a clamping position. The clamping receptacle enables a frictionally coupled and clamped hold of the handgrip device on the hand-held machine tool. The axial form-locking profile serves as an additional form-locking lock or fixation in the axial direction relative to the insertion axis. To adjust the handgrip device relative to the hand-held machine tool, e.g., in terms of its rotational position relative to the insertion axis, and / or to remove the handgrip device, the clamping receptacle must be adjusted to the release position during a first rotational operating section of the handgrip, thereby releasing the interference fit. In addition, the axial form-lock must also be released during subsequent rotational operating sections of the handgrip.

[0003] DE 102008000516 A1 and WO 2009 / 109247 A1 describe hand-held machine tools that are provided with a spring element as an axial form coupling, which is elastically deflectable and projects into a clamping receptacle.

[0004] Other handgrip devices are known from DE 102006041069 A1 or DE 102016207755 A1.

[0005] Known hand grip devices are uncomfortable to handle. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] German Patent Application Publication No. 3829801 [Patent Document 2] German Patent Application Publication No. 102008000516 [Patent Document 3] International Publication No. 2009 / 109247 [Patent Document 4] German Patent Application Publication No. 102006041069 [Patent Document 5] German Patent Application Publication No. 102016207755 Summary of the Invention

[0007] SUMMARY OF THE INVENTION It is therefore an object of the present invention to propose an improved handgrip device.

[0008] To achieve this object, a hand-grip device of the type mentioned at the outset is provided which has a form-locking operating handle that is separate from the clamping operating handle and can be manually operated by an operator independently of the clamping operating handle in order to adjust the axial form-lock between an engagement position in which the axial form-locking contour engages with the counter axial form-locking contour and locks the hand-grip device to the mounting section of the hand-held machine tool in a form-locking manner relative to the insertion axis, and a release position in which the axial form-locking contour disengages from the counter axial form-locking contour and the hand-held machine tool and the holding device can be moved relative to the insertion axis.

[0009] The basic idea is that the clamping ring can be adjusted between a clamped position and a released position by means of a clamping operating handle, and that the axial form-locking contour can be operated using the form-locking operating handle independently and / or separately from the clamping operating handle or the clamping ring, i.e. there are two mutually independent and / or separately manually operable operating handles.

[0010] The axial form-locking profile is movably supported and / or can be manipulated independently of the clamping ring and / or the clamping receptacle. The axial form-locking profile is movably supported relative to the clamping receptacle.

[0011] The axial form-locking contour is in particular configured as a rib, while the counter axial form-locking contour is, for example, configured as a groove, in particular as a ring groove.

[0012] The axial form-locking profile and / or the counter axial form-locking profile may be provided with a ramp or lead-in ramp, which facilitates engagement of the axial form-locking profile with the counter axial form-locking profile.

[0013] Advantageously, it is provided that when the clamping receptacle is in the release position and / or when the clamping ring is in the release position, the axial form-locking contour can be adjusted between the engagement position and the release position by means of the form-locking operating handle. The clamping connection between the hand-grip device and the hand-held machine tool can be released, i.e. the clamping ring can be adjusted to its release position, while the axial form-locking contour remains engaged with the mating axial form-locking contour of the mounting section of the hand-held machine tool.

[0014] It is advantageous if the axial form-locking profile in the engaged position is configured to fix the handgrip device to the mounting section in an axially immovable and / or engageable manner relative to the insertion axis. For example, the widths of the axial form-locking profile and the counter axial form-locking profile transverse to the insertion axis can be the same except for the movement play that allows the axial form-locking profiles to engage with each other. That is, when the axial form-locking profile engages with the counter axial form-locking profile, the handgrip device cannot be moved along the insertion axis relative to the mounting section.

[0015] It is advantageously provided that the axial engagement contour in the engagement position projects forward of the inner circumferential surface of the clamping receptacle. This configuration of the axial form-fitting contour is advantageous in any case when the clamping receptacle is in the clamping position. However, it is particularly advantageous if the axial form-fitting contour in the engagement position projects forward of the inner circumferential surface of the clamping receptacle when the clamping receptacle is in its release position. Thus, for example, the clamping receptacle can be released or released without releasing the axial form-fitting. Therefore, the axial form-fitting between the handgrip device and the hand-held machine tool can be maintained even when the clamping fixation is released.

[0016] Advantageously, it is provided that the axial form-locking contour in the engaged position projects further forward of the inner circumferential surface of the clamping accommodation than in the released position.

[0017] It is possible for the axial form-locking contour in the release position not to project forward of the inner circumferential surface of the clamping receptacle, and / or to be in line with the inner circumferential surface and / or to be located behind the inner circumferential surface of the clamping receptacle. All of the above-mentioned configurations can be realized, for example, by a correspondingly large adjustment stroke of the axial form-locking contour between the engagement position and the release position. Thus, for example, multiple release positions can also be provided. For example, it is possible for the axial form-locking contour to still project forward of the inner circumferential surface of the clamping receptacle in the release position, but no longer engage with the counter axial form-locking contour. By a corresponding adjustment stroke of the axial form-locking contour, it can be further adjusted, for example, away from the inner circumferential surface of the clamping receptacle, so that the axial form-locking contour is in line with the inner circumferential surface or is adjusted behind it.

[0018] It is advantageous if, in the engaged position, the axial form-locking contour projects radially inwardly in front of the ring-shaped or annular insertion cross-section of the clamping receiving part, and, in the released position, is adjusted behind the insertion cross-section or is aligned with the insertion cross-section, so that the clamping receiving part provides or releases an annular insertion cross-section for inserting the mounting section of the hand-held machine tool when the axial form-locking contour is in the released position.

[0019] The clamping receiving portion has, for example, a cylindrical shape.

[0020] It should be noted here that the insertion cross section of the clamping receiving portion is, in particular, annular and / or has a diameter of exactly or approximately 43 mm. This makes the hand-grip device compatible with a number of hand-held machine tools whose mounting sections have clamping portions with an approximately annular outer periphery and / or a diameter of approximately 43 mm. Even if the hand-held machine tool does not have a matching mating axial profile, the axial profile of the hand-grip device does not interfere when the hand-grip device is in its release position or is adjusted to the release position.

[0021] In particular, the clamping ring as a whole and / or in the region of the clamping receptacle is electrically non-conductive or electrically insulating. It is advantageous if at least the clamping receptacle is electrically insulating or non-conductive. For example, the clamping receptacle or the clamping ring as a whole consists of a plastic material, in particular a non-conductive plastic material. However, a metallic clamping ring directly providing the clamping receptacle would also be possible. For electrical insulation, the metallic clamping ring can be provided with an electrically insulating coating in the region of the clamping receptacle.

[0022] The axial form-fitting body is in particular a separate body from the clamping ring. The axial form-fitting body is in particular not in one piece with the clamping ring.

[0023] In particular, the axial form coupling is adjustable between an engaged position and a disengaged position independently of the clamping operating handle and / or is not movably coupled to and / or not operatively engaged with the clamping operating handle.

[0024] In particular, it is intended that the axial form-locking body be operable between the engaged position and the released position, in particular from the engaged position to the released position and / or from the released position to the engaged position, solely by means of the form-locking operating handle.

[0025] It is advantageous if the axial form-locking element is not operable by the clamping operating handle, so that, for example, the clamping operating handle can be adjusted to a position assigned to the clamping position of the clamping receptacle and / or to a position assigned to the release position of the clamping receptacle without the axial form-locking element being adjusted between the engaged and disengaged positions during such adjustment.

[0026] Advantageously, when the clamping receptacle is in the clamping position, the axial form-locking body can be adjusted between an engaged position and a released position, so that the axial form-locking body can be adjusted to the released position even when the clamping ring clamps the mounting section of the hand-held machine tool.

[0027] Naturally, several axial shape-locking profiles, i.e. at least two axial shape-locking profiles, can be provided, and these can be provided in the same axial shape-locking body. However, several axial shape-locking bodies can also be provided.

[0028] A single form-lock operating handle can be provided for operating at least one axial form-locking element. The form-lock operating handle is connected to one or more axial form-locking elements, for example, by means of a transmission, a driver assembly, or the like. It is also possible for multiple form-lock operating handles to be provided for one or more axial form-locking elements. Thus, for example, an operator can simultaneously operate the same axial form-locking element or multiple axial form-locking elements by operating different form-locking operating handles, for example, two different form-locking operating handles.

[0029] It is advantageous if the axial form-locking body and the form-locking operating handle are fixedly connected to one another or are one piece. Alternatively, for example, a driving device and / or a transmission or the like can be arranged between at least one form-locking operating handle and at least one axial form-locking body. The driving device can be, for example, a transmission or can include a transmission. The driving device can also have a clearance between the axial form-locking body and the form-locking operating handle.

[0030] Although the axial form coupling can be or is possible to manually operate from the engaged position to the released position and vice versa, it is preferred if the axial form coupling is biased to the engaged position by a spring assembly, whereby the operator operates the axial form coupling in the direction of the released position against the force of the spring assembly, while the spring assembly acts in the opposite direction, i.e., towards the engaged position. For example, the axial form coupling is formed as a locking member biased in the direction of the engaged position.

[0031] The spring assembly may comprise, for example, a coil spring and / or a metal spring, preferably passed through or penetrated by a tensioning anchor for adjusting the clamping ring between the release position and the clamping position.

[0032] Advantageously, the spring assembly comprises at least one spring separate from the axial form-coupler.

[0033] The spring assembly is in particular formed by a resilient pivotal connection of the axial form-fitting body and / or by a spring separate from the axial form-fitting body, i.e., the axial form-fitting body is resiliently pivotally connected to a separate body, such as a clamping ring, and does not have spring properties of its own.

[0034] Naturally, it is possible for the spring assembly to consist, for example, of a resilient pivotal connection of the axial form-locking body to the base body of the clamping ring or to be provided with such a resilient pivotal connection.

[0035] It is preferred if the axial form-fitting body is supported so as to be linearly movable along the adjustment axis relative to the clamping ring. The spring or spring assembly acts on the axial form-fitting body, particularly in the direction of the adjustment axis. It is also possible for the axial form-fitting body to be supported so as to be only linearly movable relative to the clamping ring along one or more adjustment axes. Furthermore, it is also possible for the axial form-fitting body to be non-rotatable or non-swivelable relative to the clamping ring. It is advantageous if the axial form-fitting body is supported so as to be only linearly movable but non-swivelable relative to the clamping ring.

[0036] However, alternatively, a bearing capable of pivoting between an engaged position and a disengaged position, or a bearing capable of sliding and pivoting movement, or a bearing along a curved path of the axial form coupling would also be possible. In this case, the axial form coupling is, for example, supported for pivoting movement by means of a swivel bearing, or along a curved path by means of a guide cam mechanism and / or for sliding and pivoting movement between the disengaged and engaged positions. The swivel bearing can, for example, have a shaft connected to the axial form coupling, which is supported in the bearing receptacle so as to be pivotable about a pivot axis.

[0037] In order to provide a movable support for the axial form-fitting body, in particular a guide device or a linear bearing is provided. Preferably, a guide device for guiding the axial form-fitting body linearly along the adjustment axis is provided and / or arranged on the handgrip and / or the clamping ring. For example, guide surfaces of the guide device can be arranged on the clamping ring, on which the axial form-fitting body is supported linearly relative to the adjustment axis, and on the handgrip, in particular on the support of the handgrip.

[0038] The adjustment axis extends in particular tangentially or at a radial distance tangentially to the inner circumferential surface of the clamping receptacle.

[0039] It is advantageous if the axial coupling profile has an inclined or wedge surface for abutting and / or wedging against a counter axial coupling profile, e.g., its bottom. The bottom is, for example, the groove bottom of the counter axial coupling profile formed as a groove. It is particularly advantageous if the axial coupling body is formed as or has a wedge body formed and / or provided for wedging into the counter axial coupling profile of the handheld machine tool. The inclined or wedge surface is particularly flatly inclined with respect to the adjustment axis. For example, the inclined or wedge surface has an inclination of less than 30°, particularly less than 25°, preferably even less than 20° or less than 15°. That is, the inclined or wedge surface and the adjustment axis form an angle with each other at such an angle. It should be noted here that the inclined or wedge surface can also have an arcuate shape or arcuate section. Thus, the inclined or wedge surface does not need to be a flat or planar surface.

[0040] The oblique inclination of the wedge surface or the inclined surface amplifies the adjusting force acting, for example, along the adjustment axis, with respect to the pressing force when the axial form-fitting body acts on the counter axial form-fitting profile. For example, the spring force of the spring assembly acting on the axial form-fitting body generates a pressing force against the counter axial form-fitting profile, for example its bottom, and the pressing force is amplified, in particular many times, by the above-mentioned small angle between the inclined surface or the wedge surface and the adjustment axis. That is to say, the introduction of a tangential force of the axial form-fitting body is amplified, so to speak.

[0041] A preferred concept contemplates that the hand grip has a central longitudinal axis that is parallel or coaxial with the adjustment axis.

[0042] An advantageous measure provides for the axial form-locking contour to be mounted so as to be movable tangentially relative to the inner circumferential surface of the clamping receptacle and / or relative to the center of the clamping receptacle.

[0043] The clamping handle and the form-locking handle are in particular mounted with different degrees of freedom of movement relative to the clamping ring, i.e., for example, the clamping handle is rotatable relative to the clamping ring and the form-locking handle is movably mounted relative to the clamping ring. Thus, one embodiment provides for the clamping handle to be rotatable relative to the clamping ring in order to adjust the clamping receiving portion between the clamping position and the release position, and the form-locking handle to be movably mounted relative to the clamping ring in order to adjust the axial form-locking profile between the engagement position and the release position. It is also conceivable that the form-locking handle is rotatable relative to the clamping ring in order to adjust the axial form-locking profile between the engagement position and the release position. In this case, it is also possible for the rotational movement of the form-locking handle to be converted into a linear movement of the form-locking profile by means of a transmission.

[0044] The axial form combination and the clamping operating device are advantageously arranged coaxially, in particular with respect to the tensioning axis, which will be explained further below, and / or with respect to the longitudinal axis of the tensioning anchor, which will also be explained further below.

[0045] The clamping operating handle advantageously consists of or has a rod-like handgrip body of a handgrip that can be grasped by the operator in the palm of his hand, i.e. the handgrip body forms a component, a particularly important component or a main component of the handgrip that projects from the clamping ring and can be grasped and / or held by the operator to hold and guide the handheld machine tool.

[0046] The hand grip can be made to have different geometries, for example different diameters and / or different lengths, for example by replacing the hand grip body or by using different hand grip bodies, so that ergonomic adaptation can be achieved without any problems.

[0047] It is advantageous if a form-locking operating handle is arranged between the clamping operating handle and the clamping ring, so that the operator can grip the clamping operating handle or the handgrip body, for example with his thumb and / or index finger, and operate the form-locking operating handle.

[0048] An advantageous concept provides for a distance between the grip section of the clamping operating handle, e.g., the above-mentioned handgrip body, provided for grasping the clamping operating handle, and the grip surface of the form-lock operating handle provided for manual operation, which corresponds approximately to the distance between the front thumb joint of an adult operator's hand when the thumb is spread wide and the index finger of the same hand. Thus, the operator can grasp the grip section of the clamping operating handle and simultaneously operate the form-lock operating handle with the front thumb joint. The operator can, for example, axially move the form-lock operating handle toward the grip section of the clamping operating handle in order to operate the axial form-lock, in particular toward the release position.

[0049] The handgrip body of the clamping operating handle has, in particular, a support projection, in particular a flange projection, on the side facing the form-lock operating handle, on which the operator's hand can be supported, in particular for operating the form-lock operating handle.

[0050] It is advantageous if the positively-locking operating handle is configured as a ring or sleeve, in particular such a sleeve having a grip surface that slopes upwardly away from the clamping ring and / or has a grip recess, which is provided for manipulation by the operator.

[0051] The clamping operating handle is in particular supported on the clamping ring independently of the positive-locking operating handle.

[0052] A tensioning anchor is advantageous for operating the clamping ring. For example, the clamping ring can be adjusted between a clamping position and a release position by means of the tensioning anchor. The tensioning anchor can be linearly operated along the tensioning axis by means of a handgrip body of the clamping operating handle, such as the handgrip body described above. The handgrip body is supported on the base of the handgrip, in particular rotatably about the tensioning axis, and forms the clamping operating body. The tensioning anchor is provided with, for example, a thread section that is screwed into a screw receiving portion that is non-rotatably connected to the handgrip body. By rotating the handgrip body, the tensioning anchor can be linearly adjusted relative to the screw receiving portion in order to adjust the clamping ring between the clamping position and the release position.

[0053] The tension anchors are particularly replaceable, just like the handgrip bodies described above.

[0054] By means of tensioning anchors of different lengths, it is possible, for example, to form different lengths of the hand grip and / or to realize a larger or smaller distance between the clamping ring and the clamping operating handle, in particular the hand grip body. For example, spacer elements of different lengths, in particular the supports mentioned in the detailed description, which are passed through by tensioning anchors, can be arranged between the clamping operating handle and the form-locking operating handle.

[0055] The tensioning anchor is, for example, a rod- or bolt-shaped part that can be tensioned, for example, to adjust opposite ring ends of a clamping ring toward one another toward a clamped position, and can be released to release the clamping fixation, i.e., toward a release position, to move them away from one another, or the ring ends can be actively adjusted away from one another toward the release position.

[0056] The tensioning anchor thus extends, for example, between the clamping ring and the clamping operating handle, in particular its handgrip body.

[0057] It is advantageous if the axial form-fitting body is passed through and / or guided in a tensioning anchor, which can thus simultaneously constitute a guide element for the axial form-fitting body or the above-mentioned guide device.

[0058] In a preferred embodiment, the handgrip device has at least one rotational coupling profile for engaging with a counter rotational coupling profile on the mounting section of the hand-held machine tool. When the counter rotational coupling profile and the counter rotational coupling profile are engaged with each other, they are intended to fix the handgrip device non-rotatably relative to the mounting section of the hand-held machine tool with respect to the insertion axis. The rotational coupling profile and the counter rotational coupling profile can be engaged and disengaged, for example, by relative movement of the mounting section and the handgrip device along the insertion axis. The rotational coupling profile and the counter rotational coupling profile can be configured as or have, for example, a rib structure, a tooth structure, or the like. For example, annular teeth can be provided as the rotational coupling profile and the counter rotational coupling profile. In particular, the rotational coupling profile is configured so that the handgrip device can be fixed non-rotatably relative to the mounting section with respect to the insertion axis in at least two, especially multiple, angular positions.

[0059] For example, the rotational coupling contour is arranged on the end face of the clamping ring, which is passed by the insertion axis. It is particularly advantageous if the rotational coupling contour is provided on each of the opposite end faces of the clamping ring. This allows the handgrip device to be attached to the mounting section in opposite assembly positions, with the rotational coupling contours engaging with each other. In the two assembly positions, the handgrip protrudes from the mounting section of the hand-held machine tool on the opposite sides.

[0060] It is advantageous if the axial coupling profile in the engaged position is configured to fix the hand-grip device to the mounting section in an axially immovable and / or engaging manner such that the rotational coupling profile is engaged with the counter-rotational coupling profile, e.g., the distance of the axial coupling profile to one rotational coupling profile or the distances to several rotational coupling profiles are dimensioned on opposite end faces of the clamping ring in such a way that the axial coupling profile in the engaged position fixes the hand-grip device to the mounting section in an axially immovable and / or engaging manner such that the rotational coupling profile is engaged with the counter-rotational coupling profile when the hand-grip device is assembled to the mounting section.

[0061] An advantageous concept provides that in an engagement position in which the axial form-locking profile engages with the counter axial form-locking profile, or in an intermediate position between the engagement and release positions, the handgrip device is held on the mounting section in an axially movable manner relative to the insertion axis by a predetermined adjustment stroke, but in an undetachable manner. For example, in the engagement position, the axial form-locking profile holds the handgrip device on the mounting section in an unmovable manner relative to the insertion axis, and in the release position, the handgrip device can be moved away from the mounting section, while in the intermediate position, a part or a sub-section of the axial form-locking profile engages with the counter axial form-locking profile, but allows axial movement play of the handgrip device relative to the mounting section of the hand-held machine tool relative to the insertion axis.

[0062] For example, the transverse width of the mating axial form-locking profile relative to the insertion axis can be dimensioned and / or an adjustment stroke can be provided so that the axial form-locking profile engages with the mating axial form-locking profile but is accommodated therein in a movable manner along the insertion axis in the engaged position or in the above-mentioned intermediate position. Such axial mobility or adjustment stroke can also be realized, for example, by an inclined profile of the axial form-locking profile that terminates obliquely in the free end region or front region of the axial form-locking profile and / or by a retaining projection of the axial form-locking profile, e.g., protruding forward from the base of the axial form-locking profile.

[0063] Preferably, the axial adjustment stroke is dimensioned such that in the engaged position, or in particular in the above-mentioned intermediate position, the rotational connecting profile of the handgrip device and the counter-rotational connecting profile of the mounting section can be disengaged and engaged with each other. Thus, the axial connecting profile engages with the counter-rotational connecting profile, so that the handgrip device is non-detachably held on the mounting section. However, the handgrip device can be moved away from the counter-rotational connecting profile along the plug-in axis and can thus rotate about the plug-in axis.

[0064] The handheld machine tool is in particular a drilling or screwing machine. Advantageously, the handheld machine tool forms part of a system comprising the handheld machine tool and a handgrip device. The work tool that can be attached to the handheld machine tool is in particular a drilling or screwing tool.

[0065] An embodiment of the present invention will now be described with reference to the drawings. [Brief explanation of the drawings]

[0066] [Figure 1] FIG. 1 is a diagram of a system including a handheld machine tool and a handgrip device. [Figure 2] FIG. 2 is a diagram of the system according to FIG. 1 with the hand grip device assembled on a handheld machine tool. [Figure 3] FIG. 3 is an oblique perspective view of the front part of the handgrip device according to the preceding figures. [Figure 4] FIG. 4 is a view of an alternative axial shape combination of the handgrip device according to FIG. [Figure 5] FIG. 5 is a view of the handgrip device and machine neck of a hand-held machine tool according to the preceding figures. [Figure 6] FIG. 6 is an exploded view of the handgrip device according to the preceding figures. [Figure 7] 7 is a cross-sectional view of the handgrip device according to FIG. 5 taken approximately along section line AA of FIG. 5 when the axial form coupling is in the engaged position. [Figure 8] FIG. 8 is a partial view of the handgrip device according to FIG. 7 with the axial form coupling adjusted to the release position. [Figure 9] 9 is a cross-sectional view of the handgrip device according to FIG. 7, approximately along the section line BB in FIG. 7, cooperating with a mounting section of a hand-held machine tool having a modified mating axial shape coupling profile. DETAILED DESCRIPTION OF THE INVENTION

[0067] The system 5 comprises a handheld machine tool 10 , such as a screwdriver, and a handgrip device 30 .

[0068] The machine housing 11 of the handheld machine tool 10 has a drive section 12 from which a handgrip section 13 projects. An energy storage device 14A, such as a battery pack, for supplying electrical energy to the handheld machine tool 10 can be removably arranged on a free foot section 14 of the handgrip section 13 opposite the drive section 12. Alternatively or in addition to the mobile energy storage device 14A, the handheld machine tool 10 can also have a power connection, in particular a power cord, for connection to an electrical energy supply system.

[0069] A drive motor 15, for example an electric or pneumatic drive motor, which has a tool receptacle 17 for accommodating a working tool 19, for example a screwing tool or a drilling tool, either directly or via a transmission 16, is arranged in the drive section 12. The drive motor 15 drives the tool receptacle 17, for example about a rotation axis DA.

[0070] The drive motor 15 can be switched on and off by means of a switch 18 and can be varied, in particular with regard to its speed.

[0071] The tool receptacle 17 is provided in a mounting section 20 of the handheld machine tool 10, for example in a so-called machine neck.

[0072] On the mounting section 20, along the plug-in axis S, an object can be mounted, for example a drilling stand, in particular a hand grip device 40, which will be described below.

[0073] The mounting section 20 has a receiving section 21 extending to an end face 23 of the machine housing 11, in particular the drive section 12, between a free end face 22 of the mounting section 20 on which the tool receptacle 17 is arranged. The receiving section 21 has a cylindrical shape relative to the insertion axis S. The receiving section 21 has a holding surface 24 which is formed as a cylindrical outer surface relative to the insertion axis S or which is a cylindrical outer surface extending around the insertion axis S. The holding surface 24 is suitable as a clamping surface. The end face 23 is angled relative to the holding surface 24, for example at a right angle.

[0074] For form-locking attachment of an object to the mounting section 21 parallel to the insertion axis S, a counter axial form-locking contour 25 is provided on the holding surface 24. The counter axial form-locking contour 25 is provided in the receiving section 21 between the end faces 22 and 23. The counter axial form-locking contour 25 is configured, for example, as a groove 26 having a bottom 27, with side walls or support surfaces 28 extending away from the bottom, for example at a right angle, to the holding surface 24.

[0075] Preferably, the counter axial profile-locking contour 25 extends around the entire circumference of the receiving section 21 relative to the insertion axis S. However, it would also be possible for the counter axial profile-locking contour to extend only around a portion of the circumference of the receiving section 21. It is also advantageous to provide several counter axial profile-locking contours, which are arranged in the receiving section 21, for example, side by side relative to the insertion axis S and / or circumferentially relative to the insertion axis S. The counter axial profile-locking contours arranged side by side relative to the insertion axis S can be configured, for example, as rib structures with two or more receiving grooves. The counter axial profile-locking contours arranged in the receiving section 21 circumferentially relative to the insertion axis S can each extend around an angular section around the insertion axis S, for example, as partial ring-shaped receiving grooves.

[0076] A rotational coupling contour 30 is used to hold the object in a form-locking manner on the mounting section 20 in the circumferential or rotational direction relative to the insertion axis S. The rotational coupling contour 30 projects, for example, in front of the end face 23 towards the holding surface 24 and / or radially outward in front of the holding surface 24. The rotational coupling contour 30 has a number of form-locking projections 31 that project, for example, parallel to the insertion axis S, in front of the end face 23. The rotational coupling contours 30 have the same radial distance 32 relative to the insertion axis S, so that the object to be mounted on the mounting section 20 can be mounted in a number of angular positions with an angular distance corresponding to the distance 32.

[0077] The mounting section 20 is mounted on a mounting body 35 of the handheld machine tool 10 which is a component of or connected to the machine housing 11. The mounting body 35 comprises a peripheral wall 36 having a radially outer periphery which provides the holding surface 24, and an end wall 37 which projects like a flange forward of the peripheral wall 36 and is provided with the end face 23.

[0078] An attachment 17A, such as a drill chuck, an angle attachment, or the like, can also be arranged in the tool receptacle 17. According to FIG. 2, the attachment 17A is illustratively a drill chuck, to which a work tool 19A, such as a drill, can be removably attached. For the drilling operation, it is important that the operator can securely grip the handheld machine tool in order to support the forces that occur during the drilling operation. For this purpose, the handheld machine tool can be gripped not only by its machine housing 11, e.g., by the handgrip section 13 and, if necessary, also by the drive section 12, but also by a handgrip device 40, which can be removably connected to the handheld machine tool 10.

[0079] The hand-grip device 40 has a clamping ring 41 for mounting on the hand-held machine tool 10. The clamping ring 41 has a clamping receptacle 42 into which the mounting section 20 of the hand-held machine tool 10 can be inserted along the insertion axis S. The clamping receptacle 42 has a cylindrical inner circumferential surface 43, in particular a clamping surface, which is provided and configured for clamping onto the holding surface 24 of the hand-held machine tool 10. When the clamping receptacle 42 abuts against the holding surface 24 with an interference fit, the hand-grip device 40 is held on the hand-held machine tool 10 in a frictionally bonded manner.

[0080] The clamping ring 41 has a ring body 44 that defines a clamping receptacle 42. The ring body 44 has a circumferential slot 45A, by means of which the insertion cross section of the clamping receptacle 42 can be adjusted relative to the insertion axis S. The slot 45A extends radially relative to the insertion axis S. The ring ends 45 and 46 of the ring body 44 face each other in the area of ​​the slot 45A. By manipulating the ring ends 45 and 46 of the clamping ring 41 toward each other along the tensioning axis SP, the insertion cross section of the clamping receptacle 42 can be reduced relative to the insertion axis S, thereby clamping the mounting section 20 of the hand-held machine tool in a possible clamping position K. The clamping position K is shown in FIG. 7 by dashed lines. When the ring ends 45 and 46 are moved away from each other, the insertion cross section of the clamping receiving portion 42 is enlarged and the mounting section 20 is adjusted to a release position L, shown in solid lines in Figure 7, in which the mounting section 20 is movable in the clamping receiving portion 42 relative to the insertion axis S.

[0081] The rotational connecting contours 50 on the opposite end faces 47 and 48 of the clamping ring 41 for engagement with the rotational connecting contour 30 of the hand-held machine tool 10 provide a rotationally immobile hold of the clamping ring 41 relative to the insertion axis S in the mounting section 20. The rotational connecting contours 50 on the respective end faces 47 and 48 of the clamping ring 41 allow the rotational connecting contours 30 of the mounting section 20 to engage with the rotational connecting contours 50 of the hand-grip device 40 in all insertion directions relative to the insertion axis S.

[0082] The rotational form-locking contour 50 comprises a form-locking receiving recess 51 for engagement of the form-locking projection 31, which has an angular distance 52 corresponding to the distance 32 relative to the insertion axis S. In order to allow movement play of the clamping ring 41 when adjusting it from the release position L to the clamping position K relative to the rotational form-locking contour 30 in the region of the ring ends 45 and 46, it is advantageous if the form-locking receiving recess 51 has an angular width relative to the insertion axis S in the region of the ring ends 45 and 46 of the clamping ring 41.

[0083] A hand grip 60 projects from the clamping ring 41. The hand grip 60 has a support 61 supported by the clamping ring 41. The support 61 has a sleeve body 62, from the front of which projects a support projection 63. The support projection 63 projects at the ring end 46 of the ring body 44 towards the receiving part 53. The support contour 64 of the support 61 is supported by the support contour 54 of the clamping ring 41 relative to the tensioning axis SP. The support contour 54 is formed, for example, on the end face of the peripheral wall 55 of the receiving part 53, but a step could also be provided inside the receiving part 53 without any problems.

[0084] For adjustment of the clamping ring 41 between the clamping position K and the release position L, a tensioning anchor 66 is used which passes through the clamping ring 41 in the region of the ring ends 45 and 46, so that the ring ends 45 and 46 are moved towards each other to adjust the clamping reception to the clamping position K, or movement of the ring ends 45 and 46 away from each other is permitted or effected to adjust the clamping reception towards the release position L. The tensioning anchor 66 has a head 67 arranged on a bolt section 68 which is non-rotatably received in a reception 49 at the ring end 45. The head 67 and the reception 49 have, for example, complementary, in particular polygonal, anti-rotation contours.

[0085] The bolt segments 68 pass through the through-openings 56 and 57 and the support 61 at the ring ends 45 and 46 and engage at their free ring ends in insertion openings 77 in the handgrip body 70 of the handgrip 60. The free ends of the bolt segments 68 are provided with threads which are screwed into nuts 69 which are non-rotatably accommodated in the handgrip body 70.

[0086] Furthermore, it is advantageous if a stopper 69A, e.g. a non-rotatably fixed nut, flange projection or the like, is arranged at the free end of the bolt section 68, which limits the adjustment stroke of the nut 69 along the bolt section 68, so that the nut 69 cannot fall out and / or the bolt section 68 cannot rotate completely off the nut 69. The stopper 69A therefore constitutes a kind of anti-detachment for the nut 69.

[0087] The handgrip 60, in particular the handgrip body 70, has an elongated shape and extends along a central longitudinal axis LM of the handgrip 60.

[0088] The handgrip body 70 is rotatable relative to the support 61 and relative to the ring body about a rotation axis D, which is in particular coaxial with the tensioning axis SP and / or coaxial with the longitudinal central axis LM, so that the nut 69 is screwed along the bolt section 68, and thus the head 67 of the tensioning anchor 66, which forms the counter-receiving body, is moved toward or away from the handgrip body 70. This causes the ring end 45 to be manipulated toward the ring end 46 into a clamping position K, or to be manipulated or released toward a release position for moving it away from the ring end 46. The hand H of the operator BE can grasp the grip section 71, for example with fingers F, and rotate the handgrip body 70, and thus the nut 69, about the rotation axis D. The handgrip body 70 forms a clamping operating handle 78 for adjusting the clamping receptacle 42 between the release position L and the clamping position K.

[0089] Of course, instead of the nut 69, the hand grip body 70 can also be provided with a thread for screwing in the bolt section 68 directly or integrally therewith. Furthermore, the hand grip body 70 can also have a threaded projection that screws into a threaded receptacle at the ring end 45 of the ring body 44 in order to provide tensioning along the tensioning axis SP.

[0090] The handgrip body 70 has a grip section 71 for grasping by an operator. The grip section 71 extends between support projections 72 and 73 at the free end region of the handgrip 60 or facing towards the support body 61. The support projections 72 and 73 are formed like flange projections. The handgrip body 70 further has a retaining receptacle 74 for the nut 69.

[0091] In particular, an elastic layer 75 is provided in the region of the grip section 71 and / or the support projection 72 .

[0092] Advantageously, the support projection 73 is provided with a reinforcement 76 by means of which the handgrip body 70 is supported on the support body 61 .

[0093] To form-lock or mount the handgrip device 40 to the mounting section 20 of the hand-held machine tool 10 in an axially form-locking manner relative to the insertion axis S, an axial form-locking body 80 is used, which has an axial form-locking contour 81 for engagement with the mating axial form-locking contour 25 of the mounting section 20. The axial form-locking contour 81 has a front face 82 that is located opposite or bears against the bottom 27 of the groove 26 when the axial form-locking contour 81 engages with the mating axial form-locking contour 25. A support surface 83, e.g., a lateral surface or side wall, which is provided for form-locking support on the support surface 28 of the groove 26, extends at an angle away from the front face 82, e.g., perpendicular to the direction away.

[0094] The axial shape-locking body 80 is supported by a guide device 87 so as to be movable along the adjustment axis SA between an engagement position E in which the axial shape-locking contour 81 engages with the counter axial shape-locking contour 25 or groove 26, and a release position F in which the axial shape-locking body 80 or the axial shape-locking contour 81 disengages from the counter axial shape-locking contour 25.

[0095] The front surface 82 is inclined obliquely with respect to the adjustment axis SA and forms an inclined surface 82B or has an inclined surface as a lead-in bevel 82B, which facilitates the engagement of the axial shape-locking profile 81 with the mating axial shape-locking profile 25.

[0096] For example, a tensioning anchor 87 passing through the through opening 86 of the axial form-fitting body 80 can be used as a component of the guide device 87. The axial form-fitting body 80 is supported so as to be movable along the tensioning anchor 87 relative to the adjustment axis SA.

[0097] Furthermore, a receiving portion 53 is formed in the clamping ring 41 for receiving and / or guiding the axial form-fitting body 80. The axial form-fitting body 80 is received in the receiving portion 53 and / or guided along the adjustment axis SA.

[0098] The substantially cylindrical section 88 of the axial form combination 80 is received in a substantially cylindrical guide receiving portion 58 at the ring end 46, for example.

[0099] In the release position F, the axial form-fitting body 80 is located only in the guide receiving portion 58 and / or is pulled back into the guide receiving portion 58. In the engagement position E, the axial form-fitting body 80 projects forward of the guide receiving portion 58 and enters into a support receiving portion 59 at the ring end 47 which is located opposite and aligned with the guide receiving portion 58.

[0100] In principle, however, the axial form-fitting element 80, with an appropriate length, could also at least partially engage in the support receptacle 59 in the release position F. The support receptacle 59 and the guide receptacle 58 have the same cross section, in particular transversely to the adjustment axis SA. In the engagement position E, the axial form-fitting element 80 is therefore supported on both ring ends 46 and 47 transversely to the insertion axis S, so that the handgrip device 40 can be optimally supported on the mounting section 20 of the hand-held machine tool 10 with respect to forces acting axially in the direction of the insertion axis S.

[0101] Furthermore, the axial form-fitting element 80 is guided in the handgrip device 40 in a manner that prevents it from rotating relative to the adjustment axis SA, for example relative to the clamping ring 41. For this purpose, the axial form-fitting element 80 has, for example, a rotation prevention contour 89, in particular a guide projection that projects radially outward relative to the insertion axis S and engages in a counter rotation prevention contour 59A, for example a groove, a slot or similar other guide receptacle. The rotation prevention contour 89 and the counter rotation prevention contour 59A extend parallel to the adjustment axis SA and, in particular, have an elongated shape relative to it.

[0102] A form-locking operating handle 90 is used to operate the axial form-locking body 80. The form-locking operating handle 90 could in principle be movably connected to the axial form-locking body 80, for example by means of mutually engaging entraining contours, but in particular is one piece with the axial form-locking body 80.

[0103] The form-locking operating handle 90 comprises a grip piece 91 configured as a sleeve body 91A, which is arranged in the end region of the section 88 of the axial form-locking body 80 opposite the axial form-locking contour 81. The grip piece 91 has a grip surface 92, in particular with an inclined configuration and / or grip recesses. The grip surface 92 slopes upward from the clamping ring 41 in the direction of the handgrip body 70. The grip surface 92 can therefore be comfortably grasped by the thumb DA of the operator BE, who can then grasp the handgrip body 60 with his / her other fingers F and manipulate it in the direction of the handgrip body 60 along the adjustment axis SA.

[0104] The form-locking operating handle 90 has, on its side facing the clamping ring 41, a recess 93 into which the circumferential wall 55, which defines the recess 53 of the clamping ring 41, engages. These components which engage with one another can also form part of the guide device 87. In both cases, the circumferential wall 55 engages with the recess 93 of the gripping piece 91 in the engagement position E. It is advantageous if the circumferential wall 55 also at least partially engages with the recess 93 in the release position F.

[0105] The axial form-fitting body 80, and thus the axial form-fitting contour 81, is spring-loaded into the engagement position E by a spring assembly 95. The spring assembly 95 comprises a spring 96, for example a coil spring. The spring assembly 95 is supported on the axial form-fitting body 80 in a receiving portion 94, for example in the longitudinal end region of the section 88 facing the handgrip body 70, and on the support body 61, for example on the support projection 63 of the support body, in particular on the end face of the support projection 63. This means that the axial form-fitting body can be moved from the engagement position E to the release position F against the force of the spring assembly 85. In the release position F, a stationary stop 65 is assigned to the handgrip 60. The stop 65 is, for example, constituted by or provided by the support contour 64 of the support body 61, against which a stop 97 of the grip piece 91 rests in the release position F.

[0106] In order to facilitate engagement of the axial shape-fitting contour 81 with the groove 26, the front face 82 is provided with an inclined surface 84 which slopes upwardly towards the free end 85 of the axial shape-fitting body 80, so that the free end 85 has a greater distance from the clamping receiving portion 42 or the inner peripheral surface 43 than the area of ​​the front face 82 facing towards the section 88 of the axial shape-fitting body 80.

[0107] Advantageously, the front face 82 is provided with a rounded area 82A, the radius of which corresponds approximately to the radius of the inner circumferential face 43, so that the area 82A can abut positively against the bottom 27 of the groove 26 in the engagement position E.

[0108] The front face 82 further comprises an inclined or wedge surface 82B that can engage with the counter axial profile-locking profile 25 in the sense of a wedge lock. The wedge surface 82B is inclined at an angle α relative to the adjustment axis SP. The angle α is, for example, a flat angle of approximately 5° to 25°, in this case approximately 10° to 15°. The wedge surface 82B redirects the adjustment force Fs acting along the adjustment axis SP and generated, for example, by the spring assembly 95, into a pressing force Fa that acts on the bottom 27 of the counter axial profile-locking profile 25. The flat inclination of the wedge surface 82B, and thus the small angle α, results in a force amplification, i.e., the pressing force Fa is greater than the adjustment force Fs, in particular several times greater.

[0109] The handgrip device 40 has a depth stop element 99 for setting the penetration depth of the work tool 19 or 19A into the workpiece. The depth stop element 99 is, for example, a rod that is accommodated in a receiving portion 98 of the handgrip device 40 so as to be movable parallel to the insertion axis S. The receiving portion 98 is provided in the clamping ring 41, in particular at the ring end 45.

[0110] When the handgrip device 40 is to be removed from the hand-held machine tool 10, it is intended that the clamping receptacle 42 is first adjusted from the clamping position K to the release position L. To do this, it is sufficient to slightly rotate the handgrip body 70, i.e., the clamping operating handle 78, about the rotation axis D. The operator then adjusts the form-locking operating handle 90 toward the handgrip body 70, for example, by moving it with the front thumb joint DAG of the operator's thumb DA, thereby releasing the form-locking lock by adjusting the axial form-locking element 80 from the engaged position E to the released position F. A short adjustment stroke is sufficient for this. The operator can then completely remove the handgrip device 40, for example, from the mounting section 20 of the hand-held machine tool 10, i.e., pull it away, so to speak, along the insertion axis S.

[0111] It is also possible for the operator to only partially adjust the handgrip device 40 along the insertion axis S, so that the rotational coupling contours 30, 50 are disengaged, and the handgrip device 40 can be rotated about the insertion axis S relative to the hand-held machine tool 10. When a suitable angular position of the handgrip device 40 has been set relative to the machine housing 11, the handgrip device 40 can again be adjusted in the direction of the insertion axis S towards the machine housing 11, so that the rotational coupling contours 30, 50 engage with each other. It is also advantageous that the axial coupling body 80 locks into the mating axial coupling contour 25 by applying a force via a spring assembly 95.

[0112] The concept shown in Fig. 9 contemplates that the axial form coupling 80 is provided only as an additional safety measure to clamp the handgrip device 40 to the hand-held machine tool 10 and therefore prevents the handgrip device 40 from being completely removed from the hand-held machine tool 10. In Fig. 9, the elements described so far have the same structure, and in particular the handgrip device 40 remains unchanged, whereas an alternative mounting body 35A or an alternative hand-held machine tool 10A equipped therewith is contemplated. Instead of the counter axial form coupling contour 25, a wider counter axial form coupling contour 25A is provided, which has a wider groove 26A relative to the insertion axis S, and whose support surface 28A has a greater distance relative to the insertion axis S than the support surface 28. Thereby, after the clamping receptacle 42 has been released from its clamping fixation, i.e. after its adjustment to the release position L, the handgrip device 40 can be moved along the insertion axis S along the holding surface 24, but only to the extent that the axial form-locking body 80 strikes form-lockingly against one of the support surfaces 28A. The width of the groove 26A or the counter axial form-locking contour 25A relative to the insertion axis S is such that the rotary form-locking contours 30, 50 can be disengaged and engaged by axially moving the handgrip device 40 relative to the hand-held machine tool 10A by an adjustment stroke VS along the insertion axis S, but the handgrip device 40 can only be removed from the hand-held machine tool 10A once it has been adjusted to the release position F, in which the axial form-locking body 80 no longer engages with the counter axial form-locking contour 25A. Alternatively or additionally to this solution, the width of the axial form-locking contour 81 can be changed relative to the insertion axis S, so that the axial form-locking body 80, for example in the groove 26 or the counter axial form-locking contour 25, has a movement play relative to the insertion axis S in the engagement position E, which movement play makes it possible to engage or disengage the rotational form-locking contours 30, 50.

[0113] 4 combines the two previously described solutions, so to speak: on the one hand, in engagement position E, the axial form-locking element 80A abuts against the support surface 28 of the groove 26 furthest from the counter-rotary form-locking profile 30, at least at the support surface 83 which is at a greater distance from the counter-rotary form-locking profile 30 in the respective mounting position of the hand-grip device 40 on the hand-held machine tool 10, thus achieving a form-locking hold of the hand-grip device 40 on the hand-held machine tool 10 both in the radial direction and in the axial direction relative to the insertion axis S, even when the clamping ring 41 is adjusted to the release position L. Furthermore, using the form-locking operating handle 90, the axial form-locking element 80A can also be adjusted to a release position F, in which it no longer engages with the counter-axial form-locking profile 25, allowing the hand-grip device 40 to be completely removed from the hand-held machine tool.

[0114] Furthermore, an intermediate position Z of the axial form coupling body 80 between the engagement position E and the release position F can be set, in which, for example, the retaining contour 81A projecting forward of the inclined surface 84 is still engaged with the mating axial form coupling contour 25. The retaining contour 81A is formed, for example, as a retaining projection, in particular a rib, an inclined surface, or the like, projecting forward of the front face 82 and having a distance from the support surface 83 relative to the insertion axis S. When the axial form coupling body 80A is adjusted to the intermediate position Z, the handgrip device 40 has a movement play relative to the insertion axis S such that the retaining projection or support surface 83A of the retaining contour 81A can move between the support surfaces 28 of the groove 26 relative to the insertion axis S, thereby enabling the rotary form coupling contours 30 and 50 to be disengaged and engaged, but the handgrip device 40 cannot be removed from the mounting section 20 of the hand-held machine tool 10. The inventions described in the original claims of this application are set forth below. [1] A hand grip device (40) for detachably mounting on a hand-held machine tool (10), in particular a drilling machine or a screw driving machine, the hand grip device (40) comprising a clamping ring (41) having a clamping receiving portion (42) for receiving a mounting section (20) of the hand-held machine tool (10), in particular a machine neck, and a hand grip (60) protruding from the clamping ring (41) and provided and configured for gripping and / or grasping by an operator (BE), and a clamping operating hand that can be manually operated by the operator (BE). The clamping receptacle (42) can be adjusted using a handle (78) between a clamping position (K) for clamping the mounting section (20) of the hand-held machine tool (10), in which an inner peripheral surface (43) of the clamping receptacle (42) abuts the mounting section (20) of the hand-held machine tool (10) with an interference fit, and a release position (L) for releasing the mounting section (20) of the hand-held machine tool (10), in which the mounting section (20) of the hand-held machine tool (10) can be inserted into the clamping receptacle (42) along an insertion axis (S); The handgrip device (40) comprises an axial form-fitting body (80) movably supported in the clamping receptacle (42), the axial form-fitting body (80) having an axial form-fitting contour (81) for engaging with a mating axial form-fitting contour (25) of the mounting section (20) of the hand-held machine tool (10), the axial form-fitting contour (81) engaging with the mating axial form-fitting contour (25) and connecting the handgrip device (40) to the mounting section (20) of the hand-held machine tool (10) in a form-fitting manner with respect to the insertion axis (S). and a form-locking operating handle (90) that is separate from and can be manually operated by the operator (BE) independently of the tightening operating handle (78) to adjust the axial form-locking body (80) between an engaged position in which the axial form-locking contour (81) is locked to the mating axial form-locking contour (25) and a released position (F) in which the axial form-locking contour (81) is disengaged from the mating axial form-locking contour (25) and the hand-held machine tool (10) and the holding device are movable relative to the insertion axis (S). [2] The hand grip device according to [1], characterized in that when the clamping receiving portion (42), in particular the clamping ring (41), is in the release position (L), the axial shape coupling contour (81) is adjustable between the engagement position and the release position (F). [3] A hand grip device as described in [1] or [2], characterized in that when the tightening accommodation portion (42) is in the release position (L), the axial shape coupling contour in the engagement position protrudes forward of the inner surface (43) of the tightening accommodation portion (42). [4] A hand grip device as described in any one of [1] to [3], characterized in that the axial shape-locking contour (81) in the engaged position fixes the hand grip device axially immovably and / or shape-lockingly relative to the insertion axis (S). [5] A hand grip device as described in any one of [1] to [4], characterized in that the axial shape-connecting body (80) and the shape-connecting operating handle (90) are fixedly connected to each other, or are one piece, or are movably connected by a driving device. [6] A hand grip device as described in any one of [1] to [5], characterized in that the axial shape coupling body (80) is loaded into the engagement position by a spring assembly (95). [7] A hand grip device as described in any one of [1] to [6], characterized in that the axial shape coupling body (80) is supported so as to be linearly movable along the adjustment axis (SA) relative to the tightening ring (41). [8] A hand grip device as described in [7], characterized in that a guide device for guiding the axial shape coupling body (80) linearly along the adjustment axis (SA) is provided on the hand grip (60) and / or the tightening ring (41). [9] A hand grip device as described in [7] or [8], characterized in that the adjustment axis (SA) extends tangentially or at a radial distance from the inner circumferential surface (43) of the tightening receiving portion (42).

[10] A handgrip device according to any one of [7] to [9], characterized in that the axial shape coupling profile (81) has an inclined or wedge surface (82B) for abutting and / or wedging against the counter axial shape coupling profile (25), in particular against the bottom (27) of the counter axial shape coupling profile (25), with a flat inclination and / or an angle (α) of less than 30°, in particular less than 25°, particularly preferably less than 20°, relative to the adjustment axis (SA).

[11] A hand grip device described in any one of [7] to

[10] , characterized in that the hand grip (60) has a longitudinal center axis (LM) that is parallel to or coaxial with the adjustment axis (SA).

[12] A hand grip device as described in any one of [7] to

[10] , characterized in that the axial shape coupling body (80) is supported so as to be only linearly movable relative to the tightening ring (41) and / or so as not to be rotatable or pivotable.

[13] A hand grip device according to any one of [1] to

[12] , characterized in that the axial shape coupling contour (81) is supported so as to be movable relative to and / or tangentially with respect to the inner circumferential surface (43) of the clamping receiving portion (42) and / or with respect to the center of the clamping receiving portion (42) between the engagement position and the release position (F).

[14] A hand grip device as described in any one of [1] to

[13] , characterized in that the tightening operation handle (78) is rotatably supported relative to the tightening ring (41) to adjust the tightening accommodation portion (42) between the tightening position (K) and the release position (L), and the form coupling operation handle (90) is movably supported relative to the tightening ring (41) to adjust the axial form coupling body (80) between the engagement position and the release position (F).

[15] A hand grip device as described in any one of [1] to

[14] , characterized in that the tightening operation handle (78) is made up of a rod-shaped hand grip body (70) of the hand grip (60) that can be grasped by the operator (BE) in the palm of his / her hand, or has such a hand grip body (70).

[16] A hand grip device as described in any one of [1] to

[15] , characterized in that the shape-fitting operating handle (90) is arranged between the tightening ring (41) and the tightening operating handle (78).

[17] A hand grip device as described in any one of [1] to

[16] , characterized in that a distance is provided between the grip section of the tightening operation handle (78) provided for grasping the tightening operation handle (78) and the grip surface (92) of the form-fitting operation handle (90) provided for manual operation, which distance approximately corresponds to the distance between the front thumb joint (DAG) of the hand (H) of an adult operator (BE) when the thumb (DA) of the hand (H) is widely spread and the index finger of the hand, thereby allowing the operator (BE) to operate the form-fitting operation handle (90) with the front thumb joint (DAG) while grasping the grip section of the tightening operation handle (78).

[18] The hand grip device according to any one of [1] to

[17] , wherein the shape-fitting operating handle (90) is formed as a ring body or a sleeve body (91A).

[19] A hand grip device as described in any one of [1] to

[18] , characterized in that the tightening ring (41) is adjustable between the tightening position (K) and the release position (L) by a tensioning anchor (66).

[20] The hand grip device according to

[19] , characterized in that the axial shape coupling (80) is passed through and / or guided in the tension anchor (66).

[21] A hand grip device as described in

[19] or

[20] , characterized in that the tension anchor (66) can be adjusted linearly along the tension axis (SP) by the hand grip body (70) of the tightening operation handle (78), in particular by rotating the hand grip body (70) around the tension axis (SP).

[22] The hand grip device described in

[21] , characterized in that the threaded section of the tensioning anchor (66) is screwed into a screw receiving portion of the hand grip body (70), thereby allowing the tensioning anchor (66) to be linearly adjusted relative to the screw receiving portion by rotating the hand grip body (70), and a stopper (69A) is provided to prevent the tensioning anchor (66) from rotating and completely coming out of the screw receiving portion.

[23] A handgrip device as described in any one of [1] to

[22] , characterized in that the handgrip device (40) has at least one rotational profile coupling contour (50) for engagement with a mating rotational profile coupling contour (30) in the mounting section (20) of the handheld machine tool (10), and when the mating rotational profile coupling contour (30) and the rotational profile coupling contour (50) engage with each other, they fix the handgrip device (40) non-rotatably about the insertion axis (S) relative to the mounting section (20) of the handheld machine tool (10).

[24] A handgrip device as described in any one of [1] to

[23] , characterized in that the axial shape coupling contour (81) holds the handgrip device (40) in the mounting section (20) in an engagement position where it engages with the mating axial shape coupling contour (25) or in an intermediate position between the engagement position and the release position (L), so that the handgrip device (40) can be moved axially relative to the insertion axis (S) by a predetermined adjustment stroke (VS) but cannot be released.

[25] The handgrip device according to

[24] , characterized in that the adjustment stroke (VS) is dimensioned so as to enable the rotationally shaped connecting profile (50) and the counter-rotationally shaped connecting profile (30) to be disengaged and engaged with each other.

[26] A hand grip device as described in any one of [1] to

[25] , characterized in that the ring body (44) of the clamping ring (41) for adjustment between the clamping position (K) and the release position (L) has ring ends (44, 45) that are adjustable toward and away from each other, and the axial shape coupling body (80) is supported on one or both ring ends (44, 45) and / or is supported movably between the engagement position (E) and the release position (F).

[27] A hand grip device as described in any one of [1] to

[26] , characterized in that the axial shape coupling body (80) is separate from the tightening ring (41) and / or is not one piece with the tightening ring (41).

[28] A hand grip device as described in any one of [1] to

[27] , characterized in that the axial shape coupling body (80) is adjustable between the engagement position (E) and the release position (F) independently of the tightening operation handle (78), and / or is not movably coupled to and / or not operationally engaged with the tightening operation handle.

[29] A hand grip device as described in any one of [1] to

[28] , characterized in that the axial shape coupling body (80) is operable between the engagement position (E) and the release position (F) only by the shape coupling operating handle (90) and / or is not operable by the tightening operating handle (78).

[30] A handgrip device according to any one of [1] to

[29] , characterized in that the form-coupled operating handle (90) has a grip surface (92) that slopes upwards towards the tightening operating handle (78) and / or is suitable for engagement from behind, so that an operator whose hand grasps the tightening operating handle (78) with the palm of his / her hand can manipulate the grip surface (92) with the fingers, in particular the index finger, that project forward of the palm of his / her hand in order to adjust the axial form-coupled body (80) to the release position (F).

[31] A hand grip device as described in any one of [1] to

[30] , characterized in that when the tightening accommodation portion (42) is in the tightening position, the axial shape coupling body (80) is adjustable between the engagement position (E) and the release position (F).

[32] A handgrip device according to any one of [1] to

[31] , characterized in that the axial shape coupling body (80) has, in particular, an inclined lead-in surface (82B) on the end face side relative to its adjustment axis (SA), and / or a front face (82) located opposite the bottom (27) of the counter axial shape coupling contour (25) in the engagement position (E) or supported by the bottom (27), the front face (82) having a contour area (82A) that substantially corresponds to the contour of the clamping receptacle (42) in the area of ​​the axial shape coupling body (80) and / or has a roundness that corresponds to the clamping receptacle (42).

[33] A handheld machine tool (10) equipped with the handgrip device according to any one of [1] to

[32] .

Claims

1. A handgrip device (40) for detachably mounting on a handheld machine tool (10), said handgrip device (40) comprising a clamping ring (41) having a clamping receiving portion (42) for receiving a mounting section (20) of said handheld machine tool (10), and a handgrip (60) protruding from said clamping ring (41) and provided and configured for grasping and / or holding by an operator (BE), said handgrip (60) having a rod-shaped handgrip body (70) that can be grasped by the operator (BE) in the palm of his / her hand. ) or having such a hand grip body (70), a clamping operation handle (78) is used to clamp the mounting section (20) of the hand-held machine tool (10) in a clamping position (K) where the inner peripheral surface (43) of the clamping receiving portion (42) abuts the mounting section (20) of the hand-held machine tool (10) in an interference fit, and a release position ( The clamping ring (41) is rotatably supported by the clamping operating handle (78) for adjusting the clamping receiving portion (42) between the clamping position (K) and the release position (L), and the hand grip device (40) comprises an axial form coupling body (80) movably supported by the clamping receiving portion (42), the axial form coupling body (80) having an axial form coupling contour (81) for engagement with a mating axial form coupling contour (25) of the mounting section (20) of the hand-held machine tool (10). and a release position (F) in which the axial form-locking contour (81) is disengaged from the counter axial form-locking contour (25) and the hand-grip device (40) is movable relative to the hand-held machine tool (10) and the holding device (40) to the mounting section (20) of the hand-held machine tool (10) in a form-locking manner relative to the insertion axis (S).A handgrip device comprising a form-fitting operating handle (90) disposed between the clamping ring (41) and the clamping operating handle (78), the form-fitting operating handle (90) being separate from the clamping operating handle (78) and manually operable by the operator (BE) independently of the clamping operating handle (78).

2. 2. The handgrip device according to claim 1, wherein the axial shape coupling contour (81) is movable between the engagement position and the release position (F) when the clamping accommodation (42) is in the release position (L).

3. 3. The handgrip device according to claim 1, wherein the axial shape coupling contour in the engaged position protrudes forward of the inner circumferential surface (43) of the clamping receiving portion (42) when the clamping receiving portion (42) is in the release position (L).

4. 4. The handgrip device according to claim 1, wherein the axial form-locking contour (81) in the engaged position fixes the handgrip device axially immovably and / or form-lockingly relative to the insertion axis (S).

5. 5. The handgrip device according to claim 1, wherein the axial form-locking body (80) and the form-locking operating handle (90) are fixedly connected to each other, are one piece, or are movably connected by a driving device.

6. A handgrip device according to any one of claims 1 to 5, characterized in that the axial form coupling (80) is loaded into the engaged position by a spring assembly (95).

7. 7. The handgrip device according to claim 1, wherein the axial form-fitting body (80) is supported so as to be linearly movable along an adjustment axis (SA) relative to the clamping ring (41).

8. 8. The handgrip device according to claim 7, characterized in that the handgrip (60) and / or the clamping ring (41) are provided with a guide device for guiding the axial form-fitting body (80) linearly along the adjustment axis (SA).

9. 9. A handgrip device according to claim 7 or 8, characterized in that the adjustment axis (SA) extends tangentially or at a radial distance tangentially to the inner circumferential surface (43) of the clamping receiving portion (42).

10. 10. The handgrip device according to claim 7, wherein the axial shape-locking contour (81) has a sloped or wedge surface (82B) for abutting and / or wedging into the counter axial shape-locking contour (25) with a flat inclination and / or an angle (α) of less than 30° relative to the adjustment axis (SA).

11. A handgrip device according to any one of claims 7 to 10, characterized in that the handgrip (60) has a central longitudinal axis (LM) that is parallel or coaxial with the adjustment axis (SA).

12. 11. The handgrip device according to claim 7, wherein the axial form-connecting body (80) is supported so as to be only linearly movable relative to the clamping ring (41) and / or so as not to be pivotable or rotatable relative to the clamping ring (41).

13. 13. The handgrip device according to claim 1, wherein the axial shape-matching contour (81) is supported so as to be movable relative to the inner circumferential surface (43) of the clamping receptacle (42) and / or tangentially relative to the center of the clamping receptacle (42) between the engagement position and the release position (F).

14. A hand grip device as described in any one of claims 1 to 13, characterized in that the shape coupling operating handle (90) is movably supported relative to the tightening ring (41) to move the axial shape coupling body (80) between the engagement position and the release position (F).

15. 15. The handgrip device according to claim 1, wherein a distance substantially corresponds to a distance between a front thumb joint (DAG) of a hand (H) of an adult operator (BE) when the thumb (DA) of the hand (H) is widely spread and a grip surface (92) of the form-fitting operating handle (90) provided for manual operation is provided between the grip section of the tightening operating handle (78) provided for grasping the tightening operating handle (78), thereby enabling the operator (BE) to operate the form-fitting operating handle (90) with the front thumb joint (DAG) while grasping the grip section of the tightening operating handle (78).

16. 16. The handgrip device according to claim 1, wherein the form-fitting operating handle (90) is formed as a ring or sleeve body (91A).

17. 17. A handgrip device according to any one of claims 1 to 16, characterized in that the clamping ring (41) is adjustable between the clamping position (K) and the release position (L) by means of a tensioning anchor (66).

18. 18. The handgrip device according to claim 17, characterized in that the axial form-coupling (80) is passed by and / or guided in the tensioning anchor (66).

19. The hand grip device according to claim 17 or 18, characterized in that the tension anchor (66) can be moved linearly along the tension axis (SP) by rotating the hand grip body (70) of the tightening operation handle (78) around the tension axis (SP).

20. 20. The hand grip device of claim 19, wherein the threaded section of the tensioning anchor (66) is threaded into a threaded receiving portion of the hand grip body (70), such that the tensioning anchor (66) can be moved linearly relative to the threaded receiving portion by rotating the hand grip body (70), and a stopper (69A) is provided to prevent the tensioning anchor (66) from rotating and completely coming out of the threaded receiving portion.

21. 21. The handgrip device according to claim 1, wherein the handgrip device has at least one rotational profile coupling contour for engaging with a counter rotational profile coupling contour on the mounting section of the hand-held machine tool, and when the counter rotational profile coupling contour and the rotational profile coupling contour engage with each other, they fix the handgrip device against rotation about the insertion axis relative to the mounting section of the hand-held machine tool.

22. 22. The handgrip device according to claim 1, wherein the axial shape-locking contour (81) holds the handgrip device (40) on the mounting section (20) in an engaged position in which it engages with the counter axial shape-locking contour (25) or in an intermediate position between the engaged position and the released position (L), such that the handgrip device (40) can be moved axially relative to the insertion axis (S) by a predetermined adjustment stroke (VS) but cannot be released.

23. 23. The handgrip device according to claim 22, which is dependent on claim 21, characterized in that the adjustment stroke (VS) is dimensioned so that the rotationally shaped connecting profile (50) and the counter-rotationally shaped connecting profile (30) can be disengaged and engaged with each other.

24. 24. The handgrip device according to claim 1, wherein the ring body (44) of the clamping ring (41) for adjustment between the clamping position (K) and the release position (L) has ring ends (45, 46) that are movable towards and away from each other, and wherein the axial shape coupling body (80) is supported on one or both ring ends (45, 46) and / or is movably supported between the engagement position (E) and the release position (F).

25. 25. The handgrip device according to claim 1, wherein the axial form-fitting body (80) is separate from the clamping ring (41) and / or is not one piece with the clamping ring (41).

26. 26. The handgrip device according to claim 1, wherein the axial form-coupling body (80) is movable between the engagement position (E) and the release position (F) independently of the clamping operating handle (78) and / or is not movably coupled to and / or not operatively engaged with the clamping operating handle.

27. 27. The handgrip device according to claim 1, wherein the axial form-coupling body (80) is operable between the engagement position (E) and the release position (F) only by the form-coupling operating handle (90) and / or is not operable by the tightening operating handle (78).

28. 28. The handgrip device according to claim 1, wherein the form-coupled operating handle (90) has a grip surface (92) that slopes up towards the tightening operating handle (78) and / or is suitable for engagement from behind, so that an operator whose hand grasps the tightening operating handle (78) with the palm of his / her hand can manipulate the grip surface (92) with the fingers of his / her hand that extend forward of the palm of his / her hand to move the axial form-coupled body (80) to the release position (F).

29. 29. The handgrip device according to claim 1, wherein the axial form coupling body (80) is movable between the engagement position (E) and the release position (F) when the clamping accommodation (42) is in the clamping position.

30. 30. The handgrip device according to claim 1, wherein the axial form-coupling body (80) has a leading bevel (82B) on its end face and / or a front face (82) which is located opposite or bears against a bottom (27) of the counter axial form-coupling profile (25) in the engagement position (E), the front face (82) having a contoured region (82A) which substantially corresponds to the contour of the clamping receptacle (42) in the region of the axial form-coupling body (80) and / or has a radius corresponding to the clamping receptacle (42).

31. A handheld machine tool (10) comprising a handgrip device according to any one of claims 1 to 30.

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