Hand grinding machine having a motor housing and an energy-storage-device interface

Abstract

The invention relates to a hand grinding machine comprising: a disc tool (40) having a machining face (44) for machining a workpiece (WST); and a machine housing (50) in which a drive motor (11) for driving a tool holder (14) is arranged, on which holder the disc tool (40) is arranged, wherein: the machine housing (50) comprises a drive portion (51) having a motor housing (52), which comprises a motor-accommodating space (55) in which the drive motor (11) is accommodated; and the motor housing (52) comprises a single-piece peripheral wall (53) which annularly surrounds the motor-accommodating space (55). According to the invention, a connection protrusion (62) which extends along a machine longitudinal axis (LM) of the machine housing (50) and which is in particular formed in a single piece with the machine housing (50) is arranged on the peripheral wall (53), on which connection protrusion an energy-storage-device interface (80) is arranged for detachably connecting an electrical energy storage device (90) for supplying electrical energy to the hand grinding machine (10).

Description

[0001] Hand grinder with motor housing and energy storage interface

[0002] The invention relates to a hand-held grinding machine comprising a disc tool with a machining surface for machining a workpiece, and a machine housing in which a drive motor is arranged for driving a tool holder on which the disc tool is arranged, wherein the machine housing has a drive section with a motor housing which has a motor receiving space in which the drive motor is accommodated, wherein the motor housing has a one-piece peripheral wall which surrounds the motor receiving space in an annular manner.

[0003] The peripheral wall is designed, for example, in the manner of a cylindrical peripheral wall. The motor receiving space has, for example, the shape of a cylinder that is circumferentially delimited by the peripheral wall. It is preferred if the peripheral wall has a circular inner contour. However, it is also possible for the motor receiving space to have a different cross-sectional geometry, for example a polygonal cross-sectional geometry or a cross-sectional geometry having at least one corner. In particular, it is advantageous if at least one anti-twist contour is provided in the motor receiving space to hold the drive motor against twisting. This anti-twist contour can be created, for example, by a non-circular cross-section of the motor receiving space or by a projection protruding into the motor receiving space, in particular a rib, or a form-fitting receptacle into which a contour of the drive motor engages or can engage.The motor housing protects the drive motor and also contributes to the rigidity of the machine housing. A power cable is usually used to connect the machine to an electrical power grid.

[0004] However, the application area of ​​such a hand grinder is limited by the fact that an electrical power supply network is required for power supply.

[0005] It is therefore the object of the present invention to provide an improved hand grinder.

[0006] To achieve the object, in a hand-held grinding machine of the type mentioned at the outset, a connecting projection extending along a longitudinal axis of the machine housing is arranged on the peripheral wall, on which an energy storage interface is arranged for the detachable connection of an electrical energy storage device for supplying electrical energy to the hand-held grinding machine.

[0007] The peripheral wall is therefore a continuous and / or single-body peripheral wall or a single-body peripheral wall. The peripheral wall is not formed by joining two housing halves or half-shells, but rather a one-piece component. However, other parts of the machine housing can be made from housing parts, for example, attached to the peripheral wall or to the base body or a base body containing the peripheral wall. The one-piece peripheral wall advantageously provides rigidity and strength to the motor housing space.

[0008] The peripheral wall, for example, is made of plastic.

[0009] Overall, it is advantageous if the machine housing is made entirely or partially of plastic.

[0010] The connecting projection, for example, is integral with the machine housing. However, it would also be entirely conceivable for the connecting projection to be firmly connected to the machine housing, for example, by a form-fitting connection, in particular by being screwed and / or plugged onto the machine housing and / or by being integrally connected to the machine housing, for example, by being glued and / or welded to the machine housing.

[0011] The basic idea is that the motor housing, with its peripheral wall, protects the drive motor, while still providing an energy storage interface for connecting an electrical energy storage device, such as a battery pack. Compared to a simple mains interface or a connecting cable for electrical power supply via a power grid, the energy storage interface for connecting an energy storage device or battery pack is larger, which is why hand-held grinders typically feature a machine housing with half-shells or housing sections between which the energy storage interface is held.

[0012] A preferred concept provides that the hand-held grinder has a handle portion by which the hand-held grinder can be grasped by an operator and guided forward along the workpiece in a working direction, in particular parallel or with a directional component parallel to the longitudinal axis of the machine housing, wherein the connecting projection and / or at least a portion of the handle portion protrude rearward from the motor housing in the working direction. Thus, the hand-held grinder is convenient to operate.

[0013] The handle section is advantageously arranged on a handle body arranged on the machine housing, in particular at least partially integral with the machine housing, which handle body projects rearward from the motor housing in the working direction. The handle body can be one-piece or multi-part. It is preferred if the handle body comprises a housing body that is one-piece or firmly connected to the machine housing as one handle body part, which is connected or closed by a housing cover as another handle body part. The connecting projection with the energy storage interface can interact with the handle body. For example, the handle body is supported by the connecting projection. However, it is also possible for the connecting projection to form the handle body entirely or partially.For example, an arrangement is possible in which the connecting projection can be grasped by the operator, but in addition a handle body is provided for gripping by the operator.

[0014] An advantageous concept provides for the handle body and the connecting projection to be directly connected to one another at an end region facing away from the motor housing. It is advantageous for a connection to also be provided for the other end regions of the handle body and the connecting projection. It is preferred for the handle body and the connecting projection to be connected to one another in the region of the motor housing by the motor housing. However, it is also possible for the connecting projection and the handle body to be directly connected to one another close to the machine housing. This measure can advantageously contribute to the rigidity of the machine housing and / or hand-held grinder.

[0015] The following measures are ergonomically advantageous and, for example, also protect the operator's hand while holding the hand grinder. Furthermore, the measures explained below ensure high rigidity of the machine housing, so that, for example, no or only minimal damage is to be feared if it falls onto a surface.

[0016] A preferred concept provides that a through-opening is provided between the handle body and the connecting projection, which can be reached through by an operator's hand grasping the handle body.

[0017] It is advantageous if the handle body and the connecting projection have or form an approximately V-shaped or U-shaped configuration transversely to the longitudinal axis of the machine. The handle body and the connecting projection form, for example, side legs of the V-shaped or U-shaped configuration, which are connected to one another directly at their end region remote from the machine housing and / or motor housing in the V-shaped configuration and by a base leg in the U-shaped configuration.

[0018] The handle body and / or the connecting projection preferably have an elongated shape.

[0019] It is advantageous if a longitudinal axis of the handle body is oriented approximately parallel or at a small angle with respect to the processing surface.

[0020] A longitudinal axis of the connecting projection is preferably angled to the machining surface, for example at an angle of maximum 30° and / or a larger angle with respect to the machining surface than the longitudinal axis of the handle body.

[0021] An advantageous concept provides for the handle body and the connecting projection to have opposing wall sections that extend transversely to the machine's longitudinal axis or transversely to the machine's longitudinal center plane, which runs parallel to the machine's longitudinal axis and is angled, in particular perpendicular, to the machining surface. Furthermore, it is possible for the handle body and the connecting projection to have wall sections that are laterally offset from one another.

[0022] It is advantageous if the transverse width of the wall section of the connecting projection is at least 80%, preferably at least 90%, of the transverse width of the wall section of the handle body in the area of ​​the machine housing. Thus, the connecting projection is relatively wide transversely to the machine's longitudinal axis.

[0023] One embodiment can provide that the energy storage interface forms an integral component of the connection projection or is at least partially integral with the connection projection. However, a modular concept is preferred: An advantageous variant provides that the energy storage interface has an energy storage holding body separate from the connection projection for positively holding the energy storage device, wherein the energy storage holding body is received in a holding body receptacle arranged on the connection projection. The energy storage holding body has, for example, connecting means, for example positive-locking contours, in particular longitudinal grooves, locking contours or the like, and / or electrical connection contacts for establishing electrical connections between the energy storage device and electrical components of the hand-held grinding machine arranged in the machine housing.

[0024] The energy storage holding body can be inserted into the holding body receptacle, for example. The holding body receptacle is designed, for example, as a plug-in receptacle.

[0025] A preferred concept provides that the holding body receptacle is closed by a receptacle closure body that is detachably connected or connectable to the connecting projection, in particular by screwing. The receptacle closure body is advantageously designed as a housing part. However, it is also possible for the receptacle closure body to be, for example, a screw, a plug-in element, or the like.

[0026] It is advantageous if the receiving closure body is attached to the connecting projection with a joining direction transverse to the machine's longitudinal axis and / or a support region of the receiving closure body, with which the receiving closure body is supported on the connecting projection, has a greater longitudinal extent with a directional component parallel to the machine's longitudinal axis than transverse, in particular perpendicularly transverse, to the machine's longitudinal axis. The support region comprises, for example, opposing wall sections or end faces of walls of the receiving closure body. Thus, the receiving closure body is designed as a closure body that is elongated essentially along the machine's longitudinal axis. This measure can advantageously contribute to effective support of the energy storage device on the motor housing or machine housing.

[0027] The receiving closure body and the connecting projection are designed, for example, as housing parts or housing shells.

[0028] The receiving closure body is advantageously held on the connection projection by plug-in contours.

[0029] The plug-in contours can help ensure that the weight forces of the energy storage device acting at the energy storage interface are optimally transferred into the machine housing.

[0030] A preferred concept provides that a plug-in arrangement with at least one plug-in projection and a plug-in receptacle receiving the plug-in projection is arranged on the receiving closure body and the connecting projection, which plug-in arrangements engage with one another when the receiving closure body is mounted on the connecting projection and / or are supported on one another in a centering manner in order to center the receiving closure body on the connecting projection.

[0031] The plug-in arrangement preferably comprises a series arrangement of a plurality of plug-in projections and plug-in receptacles which are in engagement with one another when the receptacle closure body is mounted on the connecting projection.

[0032] It is further advantageous if at least one plug-in receptacle of the plug-in arrangement is formed by spaced-apart wall sections, one of which wall sections lies opposite the energy storage holding body, in particular for supporting it, and the other wall section forms an outer wall of the connecting projection. The wall sections run, for example, transversely to the longitudinal center plane of the machine. The plug-in receptacle is formed directly by wall sections and provided in a cavity between the wall sections. An advantageous embodiment provides that at least one plug-in receptacle of the plug-in arrangement is formed by a step or receiving groove into which a plug-in projection engages, wherein the step or receiving groove and the plug-in projection are arranged on mutually engaging and / or mutually supported end faces of walls of the connecting projection and of the receiving closure body.

[0033] It is possible, for example, that on adjoining or interlocking end faces of walls of the receiving closure body and the connecting projection, a step or groove is provided on one of the walls, into which the end face of the other of the walls engages.

[0034] It is advantageous for the energy storage interface to provide the best possible support for the energy storage device. Some advantageous measures are suggested below.

[0035] An advantageous concept provides that the energy storage interface, in particular the energy storage holding body, has an elongated shape and extends along the connecting projection. It is particularly advantageous if the energy storage interface extends elongated along the connecting projection in the direction of the machine's longitudinal axis.

[0036] The energy storage interface, in particular the energy storage holding body, preferably has a plug-in receptacle for plugging in the energy storage device or is designed as such.

[0037] Preferably, the energy storage interface, in particular the energy storage holding body, has positive-locking contours extending along its longitudinal extent, in particular longitudinal grooves and / or longitudinal projections. Furthermore, the energy storage interface advantageously includes locking means for locking the energy storage device. The locking means comprise, for example, one or more locking receptacles. As explained, the energy storage interface and the connection interface of the energy storage device advantageously comprise connection contacts, in particular plug contacts, for establishing electrical connections between the energy storage device and electrical components of the hand-held grinding machine.

[0038] A preferred concept provides that the energy storage interface, in particular the energy storage holding body, has connection contacts for the energy storage arranged closer to the motor housing and further away from the motor housing, in particular arranged at its longitudinal end region furthest away from the motor housing, for example data contacts at one longitudinal end region and energy supply contacts at the other longitudinal end region.

[0039] The energy storage device preferably protrudes slightly or to a lesser extent from the connecting projection or handle body when it is fastened to the machine housing. Advantageously, the energy storage device, when arranged at the energy storage interface, does not protrude beyond a longitudinal end of the connecting projection and / or handle body facing away from the motor housing, or protrudes only slightly or not at all, from the components of the machine housing, for example the hook body and / or connecting projection, when the energy storage device is arranged at the energy storage interface.

[0040] With respect to the longitudinal axis of the machine, the connecting projection can run in a straight line, but can also have at least one step, curves or the like. It is preferred if the wall section of the connecting projection extending along the longitudinal axis of the machine has at least one step transverse to the longitudinal axis of the machine. The at least one step can be provided, for example, in the region of the passage opening, in particular at the passage opening and / or in particular to widen the passage opening. However, it is also possible for a step to be present on a side of the connecting projection facing away from the handle section or handle body. The at least one step contributes, for example, to enlarging the passage opening and / or to mechanically stiffening the connecting projection.A part of the at least one step can also be provided on the receiving closure body, which is designed in particular as a housing part.

[0041] The measures explained below contribute advantageously to optimal protection of the drive motor in the motor housing and / or to easier installation of the drive motor on or in the machine housing.

[0042] The motor housing advantageously has a cover wall that closes off the motor receiving space at the front, in particular one-piece with the peripheral wall. Thus, the motor housing and / or the motor receiving space is designed, for example, as a plug-in receptacle into which the drive motor can be inserted.

[0043] The top wall advantageously forms a floor of the engine compartment.

[0044] The cover wall can advantageously have one or more through-openings, for example for cables or similar other electrical components, in particular for connecting the drive motor.

[0045] An assembly opening is advantageously arranged opposite the cover wall, which can be closed by the cover explained below.

[0046] A preferred concept provides that the motor receiving space is accessible exclusively through the mounting opening for mounting the drive motor. Other components, for example an eccentric gear and / or a fan wheel and / or a tool shaft or the like, can also be arranged on the drive motor and can also be introduced into the motor receiving space through the mounting opening. In particular, a drive train comprising the drive motor, preferably including the tool holder for the disc tool, can be introduced completely or as a whole through the mounting opening into the motor receiving space. The drive train comprises, for example, in addition to the drive motor, at least one further drive component, for example a gear and / or a tool shaft and / or a fan wheel and / or the tool holder.A plug-in cross-section of the mounting opening is preferably dimensioned such that the largest outer circumference of the drive motor, in particular of the drive train comprising the drive motor, can be introduced through the mounting opening into the motor receiving space.

[0047] Advantageously, a plug-in cross-section of the mounting opening is dimensioned such that the drive motor and all components connected to the drive motor, which can only be connected to the drive motor or mounted on the drive motor outside the motor mounting space, can be inserted through the mounting opening into the motor mounting space. For example, joining directions or mounting directions can be provided such that the components connected to the drive motor can only be connected to the drive motor when the drive motor is arranged outside the motor mounting space. Fasteners, such as screws, can also only be accessible for mounting on the drive motor or a component connected to the drive motor when the drive motor is arranged outside the motor mounting space.

[0048] The mounting opening is preferably arranged on the side of the machine housing on which the tool holder is arranged.

[0049] However, the mounting opening can also be located on a side of the machine housing opposite the tool holder.

[0050] It can be provided that the motor receiving space advantageously has a floor, wherein this floor can also be penetrated solely by the tool holder. Thus, a design is possible in which the peripheral wall that delimits the motor receiving space has a floor wall through which the tool holder projects in front of the motor receiving space, and in which an assembly opening is provided opposite this floor wall through which the drive motor, in particular a drive train comprising the drive motor, which may for example comprise a fan wheel, an eccentric weight or the like, can be introduced into the motor receiving space. A cover is advantageously provided opposite the floor wall, with which the assembly opening can be closed. The cover can for example be arranged on a side of the machine housing opposite the tool holder. The cover can form a handle or a handle section.

[0051] Stiffening ribs or similar other stiffening contours may be provided on the peripheral wall and / or the top wall.

[0052] The motor receptacle space can be designed as a plug-in receptacle for inserting the drive motor or can have a plug-in receptacle or form a plug-in receptacle.

[0053] It is preferably provided that the motor housing is closed or closable by a cover that is detachably connectable to the motor housing. Thus, for example, the drive motor can be inserted into the motor housing, which is then closed by the cover. The cover can tightly close the motor housing. The cover can be provided and designed to fix the drive motor in the motor housing.

[0054] It is possible to provide a lid dedicated to closing the motor housing, which is different from a cover or extraction hood for the disc tool. However, it is preferred if the lid is formed by a cover and / or an extraction hood for the disc tool.

[0055] The cover is screwed, for example, to a housing base body of the machine housing, on which the motor mounting space is provided.

[0056] The following design of the hand grinder can help to support, for example, the aforementioned cover.

[0057] It is advantageous if, on a side of the peripheral wall of the motor housing facing away from the motor receiving space, a supporting wall, in particular a collar-like and / or flange-like and / or integral with the peripheral wall, projects outwards.

[0058] Among other things, the supporting wall contributes to stiffening the engine housing.

[0059] The support wall can also serve to support the handle body or the connecting projection.

[0060] It is preferably provided that the connecting projection, in particular a section opposite the handle body and / or a section spaced from the handle body and / or a section of the connecting projection arranged spaced from the handle body, is supported on the support wall and / or is integral with the support wall.

[0061] The machine housing is preferably made up of several parts and / or has several housing components, for example a housing base body and / or a housing cover.

[0062] A preferred concept provides for the machine housing to have a housing base body that integrally encompasses the motor housing and the connecting projection, and advantageously also the handle body, wherein the housing base body is closed or closable by a housing cover. The housing cover can, for example, form an upper side of the machine housing facing away from the disk tool.

[0063] It is preferably provided that the housing cover extends over the entire or substantially the entire machine longitudinal axis of the machine housing, in particular of the housing base body.

[0064] The housing cover advantageously forms a component of the handle portion, in particular of the handle body. For example, the housing cover is arranged on a side of the housing base body facing away from the connecting projection.

[0065] It is advantageous if the housing cover and the connecting projection are arranged on opposite sides of the handle body and / or that the connecting projection is arranged closer to the disc tool than the housing cover.

[0066] An advantageous concept provides for the housing cover to cover the motor housing, particularly completely, on a side of the machine housing facing away from the disk tool. It is possible for the housing cover to form the aforementioned frontal cover wall of the motor housing. However, it is also possible for the housing cover to represent a separate component from this cover wall.

[0067] It is advantageous for the housing cover to enclose a receiving space, for example, for a control unit, in particular a control module, of the hand-held grinder. However, electrical cables or similar other electrical components, for example, for supplying electrical power to the drive motor, can also be arranged in the receiving space. Therefore, a control module does not necessarily have to be arranged in the receiving space.

[0068] It is preferred if the housing cover is opposite the cover wall that closes the motor accommodation space. For example, the aforementioned accommodation space is formed between the cover wall and the housing cover. Thus, in this embodiment, another cover, namely the housing cover, is opposite the cover wall, which already closes the motor accommodation space.

[0069] This receiving space advantageously has at least one connecting channel for accommodating electrical cables with which the controller or control module and / or the drive motor is or can be connected to the energy storage interface. The receiving space is also suitable for laying or accommodating electrical cables.

[0070] A preferred concept provides for at least one switching element, preferably all switching elements, to be arranged in the receiving space for switching functions of the hand-held grinding machine that can be influenced by the controller and / or are electrical. It can be provided that at least one switching element is arranged on a circuit board or a control module of the controller. When the control module is inserted into the receiving space, the switching element is simultaneously arranged in the receiving space.

[0071] The housing cover and / or the housing base body preferably have at least one passage opening for at least one switching element or an operating body for actuating the switching element, so that the switching element arranged wholly or partially in the receiving space can be operated from an outside of the machine housing.

[0072] The multi-part design of the machine housing makes it particularly easy to use different materials or material combinations.

[0073] One advantageous concept involves making the housing base from a harder material than the housing cover. For example, different plastics are used.

[0074] It is also advantageous if the housing cover has at least one elastic, soft, or damping component on its outer side facing away from the housing base body. It is particularly advantageous if the housing base body does not have such a damping or soft component, but only the housing cover.

[0075] Furthermore, it can advantageously be provided that the housing base body consists of fewer materials than the housing cover, in particular that the housing base body consists of only a single material. This material is, for example, a hard plastic material.

[0076] The housing cover and the receiving closure body preferably do not have direct contact. The housing cover and the receiving closure body are arranged on the housing base body, but not in direct contact with each other, but rather connected via the housing base body. This measure contributes, for example, to the rigidity of the machine housing and / or reduces the influence of manufacturing tolerances.

[0077] The hand-held grinding machine of the type mentioned at the outset, in particular according to the preamble of claim 1, or according to the above embodiments, advantageously has a dust removal connection for removing dust generated during machining of the workpiece by the disc tool.

[0078] Furthermore, it is advantageous if the hand-held grinding machine has an energy storage interface for detachably connecting an electrical energy storage device for supplying electrical energy to the hand-held grinding machine, in particular the drive motor, using a connection interface of the energy storage device, wherein the electrical energy storage device has an energy storage housing which extends along an energy storage longitudinal center plane, wherein the machine housing has a machine longitudinal center plane which runs transversely, in particular at right angles, to the machining surface, wherein the hand-held grinding machine has a handle section by which the hand-held grinding machine can be grasped by an operator and guided forwards along the workpiece in a working direction parallel to the machine longitudinal center plane.

[0079] In the hand-held grinding machine with energy storage interface and dust removal connection, it is advantageous if the energy storage interface of the hand-held grinding machine is arranged with respect to the machine's longitudinal center plane and / or the connection interface of the energy storage device is arranged with respect to the energy storage device's longitudinal center plane in such a way that the energy storage device's longitudinal center plane has a transverse distance from the machine's longitudinal center plane when the energy storage device is held at the energy storage interface.

[0080] It is possible for the connection interface of the energy storage device to be arranged asymmetrically with respect to the energy storage device's longitudinal center plane, while the energy storage interface of the hand-held grinding machine has a transverse distance or lateral offset from the machine's longitudinal center plane. However, it is also possible for the hand-held grinding machine to have an energy storage interface that is arranged symmetrically with respect to its machine's longitudinal center plane, and for the connection interface of the energy storage device to be arranged asymmetrically with respect to the energy storage device's longitudinal center plane and / or has a transverse distance from the energy storage device's longitudinal center plane, so that the longitudinal center plane of the energy storage device, when the energy storage device is mounted on the machine housing or the energy storage interface of the hand-held grinding machine, is not aligned with the machine's longitudinal center plane, but has a transverse distance from it.Both of the above-mentioned measures can also be provided in combination, for example if the energy storage device is to have the greatest possible transverse distance from the longitudinal center plane of the machine.

[0081] The basic idea is that an asymmetrical configuration is realized in which the energy storage device is not arranged in alignment with the machine housing in the working direction, as in a hand-held grinder explained, for example, in DE 10 2018 103 767 A1, which represents a typical hand-held grinder, i.e., the longitudinal center planes of the machine housing and the energy storage device are aligned with one another, but rather with a lateral offset transverse to the working direction and / or transverse to the machine's longitudinal center plane. Thus, for example, with respect to the working direction in which the hand-held grinder can be guided forwards along a workpiece, there is space to the side of the energy storage device for, for example, a handle, the dust removal connection, or similar other components of the hand-held grinder.The embodiment of the hand-held grinding machine explained below is a preferred embodiment of the aforementioned hand-held power tool, but also in connection with the features mentioned at the outset or the features of the preamble of claim 1, it is an independent invention in itself.

[0082] In this hand-held grinding machine according to the preamble of claim 1 or according to the above explanations, it is provided that an underside of the dust removal connection facing the processing surface has a dust removal connection distance from a plane containing the processing surface, which is greater than a minimum energy storage distance of an underside of the energy storage device mounted on the energy storage interface facing the processing surface from the plane.

[0083] The energy storage device preferably forms part of the hand-held grinding machine and can be detachably attached to it.

[0084] The energy storage device preferably has a maximum of five, in particular a maximum of four, more preferably a maximum of three, and even more preferably a maximum of two or even just a single storage cell in a direction perpendicular to the plane in which the processing surface is arranged. For example, the energy storage device only has storage cells arranged next to one another in a single layer. However, it is also possible for the energy storage device to have several, for example two or three, layers of storage cells arranged one above the other. In this case, it is possible for the storage cells of storage cell layers arranged one above the other to have a lateral offset, so that a storage cell in one storage cell layer engages in a space between storage cells in the other storage cell layer.It is therefore possible for the energy storage housing to have a flat shape or to be flat, yet the minimum distance of the energy storage housing to the plane in which the processing surface extends is smaller than the minimum distance of the dust removal connection. The processing surface is preferably a flat surface. The dust removal connection distance and the energy storage distance are thus, for example, the perpendicular distances to a plane in which the processing surface extends. However, it is also possible for the processing surface to have a curved or arched shape, but extend essentially in the aforementioned plane to which the energy storage distance and the dust removal connection distance are related.

[0085] The basic idea here is that the energy storage unit is positioned closer to the disc tool, relatively close to the workpiece to be machined, while the dust removal connection is at a greater distance from the machining surface and thus from the workpiece. One advantage arises from the fact that the energy storage unit, which is relatively heavy in practice, results in a favorable center of gravity of the hand-held grinder, namely close to the machining surface and thus advantageously near the workpiece that can be machined by the hand-held grinder. A further or different advantage is that a suction hose, dust collection container or the like is at a greater distance from the machining surface and thus advantageously also from the workpiece that can be machined with the hand-held grinder. This makes it possible, for example, to mount a voluminous dust collection container on the dust removal connection.The routing of a suction hose, which can be connected to the dust removal connection, is also improved when configuring the hand-held grinder with the aforementioned distances between the dust removal connection and the energy storage unit and the processing surface.

[0086] It is preferred if the center of gravity of the energy storage device is arranged close to the machining surface and / or at a rear end region of the plate tool in the working direction and / or close to the outer circumference of the plate tool.

[0087] The dust removal connection distance and the energy storage distance are the distances between the dust removal connection and the energy storage device perpendicular to a plane in which the work surface runs. With respect to this plane or work surface, or with respect to the workpiece when using a hand-held grinder, the dust removal connection has a greater distance than the energy storage device. In other words, the dust removal connection is further above a surface of the workpiece that can be machined with the hand-held grinder than the energy storage device.

[0088] A clear width between, on the one hand, a plane in which the machining surface runs or in which the machining surface is at least substantially arranged, for example if the disc tool does not have a completely flat machining surface, and, on the other hand, the dust removal connection is greater than a clear width between this plane and the energy storage device.

[0089] At this point, it should be noted that a longitudinal axis of the dust removal connection, along which the dust removal connection extends, and / or a longitudinal axis of the energy storage device, when mounted on the machine housing, can be parallel to the processing surface or inclined at a small angle of less than 5°. However, it is also possible for one of the aforementioned longitudinal axes, the longitudinal axis of the dust removal connection and / or the longitudinal axis of the energy storage device, to have an inclination towards the processing surface, for example an inclination of 10-30°. At this point, it then becomes clear that the dust removal connection and / or the energy storage device can have an inclination towards the processing surface, with one longitudinal end region of the dust removal connection or energy storage device being closer to the processing surface and the other longitudinal end region being further away from the processing surface.The area of ​​the dust extraction connection closest to the working surface then has the smallest dust extraction connection distance, and the area of ​​the energy storage device closest to the working surface has the smallest energy storage distance. The smallest dust extraction connection distance is greater than the smallest energy storage distance.

[0090] An advantageous concept provides that the energy storage interface is arranged asymmetrically with respect to the machine's longitudinal center plane and / or is arranged laterally transversely next to the machine's longitudinal center plane, entirely or at least to 80% of its longitudinal extension extending transversely to the machine's longitudinal center plane. In particular, the energy storage interface is arranged laterally offset only to one side transversely to the machine's longitudinal center plane and does not extend, or extends only to a small extent of a maximum of 20% of its longitudinal extension extending transversely to the machine's longitudinal center plane, to a side opposite this side.Thus, the energy storage interface is arranged completely or almost completely laterally next to the machine's longitudinal center plane, so that on the one hand the energy storage device and on the other hand another component of the hand grinder can be arranged on opposite sides of the machine's longitudinal center plane, for example the dust removal connection or a suction hose or dust collection container arranged on the dust removal connection.

[0091] A preferred variant provides that the energy storage interface has a first and at least one second energy storage interface connection for a first and at least one second energy storage device. The energy storage interface connections can be identical in construction, but can also be different. The energy storage devices that can be mounted on the energy storage interface connections can be of the same type, for example, they can have geometrically identical energy storage housings and / or have identical electrical properties. However, it is also possible for the energy storage devices to have different electrical properties, for example, different voltages and / or different electrical energy storage capacities.

[0092] Advantageously, at least one energy storage device, more preferably additional energy storage devices, for example two or three, can be arranged on the energy storage interface arranged asymmetrically with respect to the machine's longitudinal center plane. The energy storage interface can be designed such that the plurality of energy storage devices, for example two, can be fastened and / or arranged next to one another on the energy storage interface transversely to the machine's longitudinal center plane and / or such that several energy storage devices, for example also two, can be fastened and / or arranged one behind the other on the energy storage interface with respect to an axis that runs parallel to the machine's longitudinal center plane or at a small angle of less than 45° to the machine's longitudinal center plane.

[0093] As explained, the connection interface of the energy storage device can be arranged asymmetrically with respect to the energy storage housing. For example, one embodiment provides that the connection interface of the energy storage device, which is intended for connection to the energy storage interface of the hand-held grinding machine, has different distances from the longitudinal sides of the energy storage housing, between which the longitudinal center plane of the energy storage device runs.

[0094] In the hand-held grinding machine, an advantageous arrangement provides that the longitudinal sides or longitudinal side walls of an energy storage housing of the energy storage device extend, when the energy storage device is mounted on the machine housing, parallel to or at a small angle of less than 40°, preferably less than 35°, in particular less than 30°, particularly preferably less than 20° to the machine's longitudinal center plane. The longitudinal sides or longitudinal side walls can run parallel to one another. However, it is also possible for the longitudinal sides or longitudinal side walls to be at an angle to one another, so that the energy storage housing has, for example, a trapezoidal shape. It is particularly advantageous if the longitudinal sides or longitudinal side walls converge in the direction of the connection interface and / or towards the machine housing.

[0095] It is advantageous if the longitudinal sides or longitudinal side walls of the energy storage housing have different distances from the machine's longitudinal center plane.

[0096] Advantageously, the energy storage interface is the only energy storage interface of the hand-held grinder. Therefore, no additional energy storage interfaces are required.

[0097] Advantageously, only a single energy storage device can be arranged at the energy storage interface. The energy storage interface is preferably designed for mounting only a single energy storage device. Therefore, in this embodiment, an additional energy storage device, for example, for increasing the supply voltage and / or the supply current, cannot be removably arranged at the energy storage interface.

[0098] Furthermore, it is expedient if the hand-held grinding machine can be supplied with electrical energy by only one energy storage device. Therefore, it is not possible to connect an additional energy storage device to the hand-held power tool with this design.

[0099] It is possible that the energy storage interface is arranged on the handle section or on a free end area of ​​the machine housing of the hand grinder.

[0100] However, a preferred embodiment provides that the energy storage interface of the hand-held grinding machine is arranged between the tool holder or, if applicable, the disc tool fastened or held on the tool holder, and a longitudinal end region of the handle section facing away from the tool holder or the disc tool. It is possible for the energy storage device held at the energy storage interface to protrude beyond the free end region of the machine housing or the handle section in this embodiment as well. However, it is also possible for the energy storage device held at the energy storage interface to not protrude beyond the free end region of the handle section or the free end region of the machine housing on a side facing away from the tool holder.

[0101] The energy storage device attached to the energy storage interface advantageously projects beyond the longitudinal end region of the handle section or the machine housing by a maximum of 50%, in particular a maximum of 30%, more preferably a maximum of 20% of its longitudinal length, which runs parallel to a distance between the tool holder and a longitudinal end region of the handle section or the machine housing facing away from the tool holder. The energy storage device held or attached to the energy storage interface is advantageously arranged with a partial region between the tool holder and the free end region of the machine housing or the free end region of the handle section.This partial region is preferably so long that at least half, preferably at least two-thirds, even more preferably at least 75% or 80% or 85% of the length of the energy storage housing is arranged between an end region of the handle section or of the machine housing facing away from the tool holder and the tool holder when the energy storage device is fastened to the energy storage interface.

[0102] In a variant of the invention, the energy storage interface can be arranged on a top side or on the side of the hand-held grinding machine facing away from the tool holder.

[0103] Furthermore, it is possible for the energy storage interface to be arranged on a side, for example a long side, which extends between a bottom side or side having the tool holder and a top side or side opposite the side having the tool holder.

[0104] However, it is preferred to arrange the energy storage interface on an underside or on the side of the machine housing or the handle section facing the machining surface when the hand-held grinder is in use, or on both. A preferred concept provides for the energy storage interface to be arranged on a side of the machine housing oriented toward the machining surface, in particular the handle section of the machine housing. It is also advantageous if the energy storage interface is arranged on a side of the machine housing containing the tool holder, in particular in the region of the handle section.

[0105] The energy storage housing advantageously has a front side or front wall facing the machine housing and a rear side or rear wall facing away from the machine housing, each of which extends transversely, in particular at right angles, to the longitudinal center plane of the machine. Furthermore, the front side or front wall and the rear side or rear wall preferably extend parallel to one another.

[0106] Furthermore, the energy storage housing has a top side or top wall and a bottom side or bottom wall on opposite or opposite sides. The top side and bottom side can run parallel to each other or be at an angle to each other, for example, of a maximum of 15°. The connection interface for the energy storage interface of the machine housing is advantageously provided on the top side or top wall.

[0107] The dust removal connection and the energy storage device can be arranged on opposite sides of the machine's longitudinal center plane or a plane of the machine housing parallel to the machine's longitudinal center plane. One embodiment can provide that the energy storage device's longitudinal center plane and a center plane of the dust removal connection that is perpendicular to the processing surface or to a plane containing the processing surface and parallel to the machine's longitudinal center plane are arranged on opposite sides of the machine's longitudinal center plane. It is possible for the dust removal connection and the energy storage device to be arranged on opposite sides of the machine's longitudinal center plane, essentially transverse to the machine's longitudinal center plane with respect to their transverse width, but for the dust removal connection and / or the energy storage device to be penetrated by the machine's longitudinal center plane.

[0108] Advantageously, the energy storage distance is smaller at a longitudinal end region of the energy storage device facing the machine housing of the hand-held grinding machine than at a longitudinal end region facing away from the machine housing. For example, the underside or underside wall can be inclined relative to the machining surface. The inclination is preferably a maximum of 30°, in particular a maximum of 20° or a maximum of 15°.

[0109] The embodiment of the hand-held grinding machine explained below, which in conjunction with the preamble features of claim 1 also represents an independent invention per se, provides that the energy storage device and / or the dust removal connection do not protrude beyond an outer contour of the disc tool transversely to the machine's longitudinal center plane, or protrude only by a maximum of 20% each, in particular a maximum of 15% each, preferably a maximum of 10% each of a transverse width extending transversely to the machine's longitudinal center plane. The energy storage device or its energy storage housing and / or the dust removal connection are arranged within a corridor that extends parallel to the machine's longitudinal center plane and whose lateral boundaries are defined by the maximum transverse distance of the disc tool from the machine's longitudinal center plane.This disc tool is preferably the narrowest disc tool with respect to the machine's longitudinal center plane, which can be detachably attached to the hand grinder.

[0110] Now, it is in principle possible for the dust removal connection to protrude in front of the machine housing or a cover for the disc tool in the direction of the disc tool, in particular to protrude rearward in the working direction. However, the dust removal connection is preferably arranged as close as possible to the longitudinal center plane of the machine. Advantageously, for example, it can be provided that the dust removal connection does not protrude transversely to the longitudinal center plane in front of an outer peripheral contour of the machine housing or of a cover arranged on the machine housing, in particular an extraction hood, for the disc tool. The disc tool protrudes, for example, in front of the cover transversely to the longitudinal center plane of the machine.

[0111] Advantageously, the disc tool is arranged in an extraction chamber that is fluidly connected to the dust removal channel. The extraction chamber is arranged, for example, on or formed by an extraction hood. An advantageous embodiment provides for the dust removal connection to be arranged on an extraction hood that at least partially covers the disc tool.

[0112] However, it is also possible that the extraction chamber in which the disc tool is arranged communicates with a dust removal duct that runs through the machine housing.

[0113] Advantageously, a dust removal duct that communicates with the dust removal connection runs through the machine housing. This design allows, for example, dust generated on the working surface to flow from the extraction chamber through the machine housing to the dust removal connection.

[0114] For example, the dust removal duct that runs through the machine housing makes it easy to implement the following configuration.

[0115] Advantageously, in the hand-held grinding machine, an upper side of the dust removal connection facing away from the processing surface is arranged entirely or partially above an upper side of the energy storage device arranged at the energy storage interface, said upper side facing away from the processing surface.

[0116] A preferred embodiment of the hand-held grinding machine provides for a dust removal channel that communicates with an extraction chamber in which the disc tool is arranged and the dust removal connection, and / or establishes a flow connection between the dust removal connection and the extraction chamber. The dust removal channel is arranged, for example, on or in the machine housing or runs through the machine housing.

[0117] It is advantageous for the dust removal channel to run past the energy storage interface. It is advantageous if the dust removal connection has or is formed by a connection piece for connecting a suction hose or dust collection container. Retaining contours, for example, form-fitting contours, in particular bayonet contours, locking contours, or the like, for securing the suction hose or dust collection container can also be arranged on the dust removal connection.

[0118] The dust collection container can be a component of the hand-held grinder. The dust collection container is advantageously arranged within a corridor whose outer sides are defined by the transverse width of the disc tool perpendicular to the longitudinal center plane of the machine. The dust collection container is preferably detachably attachable to the dust removal connection.

[0119] Advantageously, the dust removal connection defines a flow channel that extends along a longitudinal axis that is parallel to the machine's longitudinal center plane or has an angle of maximum 30°, in particular maximum 20°, particularly preferably maximum 15° or maximum 10°, to the machine's longitudinal center plane. Especially when the longitudinal axis of the dust removal connection runs parallel or only at a small angle to the machine's longitudinal center plane, a suction hose connected to the dust removal connection, in particular the connection piece, can be arranged closely to the machine's longitudinal center plane or run close to it. Thus, for example, the suction hose at its end region, which is connected to the hand-held grinding machine, is arranged within a corridor whose outer sides are defined by the transverse width of the disc tool transverse to the machine's longitudinal center plane.

[0120] It is advantageously provided that the handle section is penetrated by the longitudinal center plane of the machine and / or projects in front of the longitudinal center plane of the machine on opposite sides.

[0121] The handle section, in particular a handle of the handle section, is preferably symmetrical to the machine's longitudinal center plane. It is advantageous if the handle section runs parallel to the machine's longitudinal center plane.

[0122] The disc tool preferably has a plate-shaped base body on which an abrasive is fixedly or detachably mounted. For example, an adhesive, such as a Velcro layer, is provided on the working surface for releasably attaching a sanding sheet. However, it is also possible for the base body of the disc tool to integrally incorporate a structure on the working surface suitable for abrasive machining of a workpiece. The disc tool can, for example, be a round disc tool, but also a polygonal, in particular a rectangular or triangular disc tool.

[0123] A preferred concept provides for the optional attachment of different disc tools to the hand-held grinder. The disc tool preferably has a mounting interface on one side of the machine for attachment to the tool holder of the hand-held grinder, for example, a screw contour, through-holes, or the like, with the machine side and the machining surface being arranged on opposite sides of the disc tool.

[0124] Preferably, flow channels are provided on the disc tool for the flow of dust-laden air, wherein the flow channels have inlet openings on the processing surface and outlet openings on a machine side of the disc tool opposite the processing surface.

[0125] A symmetrical design and / or arrangement of a drive train of the hand-held grinding machine with respect to the machine's longitudinal center plane is geometrically advantageous.

[0126] It is advantageously provided that the machine longitudinal center plane runs parallel to a tool axis of a tool shaft driven or drivable by the drive motor, on which the disk tool is arranged or can be arranged for driving by the drive motor.

[0127] It is also advantageous if an output of the drive motor or an output shaft of the drive motor is arranged in the longitudinal center plane of the machine.

[0128] Furthermore, it is preferred if a drive and / or an output of a gear, which is arranged between the tool holder and the drive motor, extends in the longitudinal center plane of the machine.

[0129] An advantageous concept provides that the disk tool can be driven in a rotational and / or oscillating manner with respect to the tool axis by the drive motor, in particular by means of a gear, and / or can be driven with a hypercycloidal rotational movement.

[0130] The tool holder of the hand grinder, to which the disc tool is attached or detachably attachable, is preferably rotatable about a tool axis.

[0131] It is also possible that a gear is arranged between the drive motor and the tool holder, by means of which the tool holder can be driven by the drive motor to a hypercycloid and / or eccentric and / or linear or oscillating movement.

[0132] The tool axis preferably runs transversely, in particular at right angles, to the machining surface.

[0133] The energy storage device contains storage cells, such as battery cells, which can provide electrical energy and are rechargeable.

[0134] The energy storage housing preferably has a cubic shape. The storage cells are arranged in the energy storage housing. An exemplary embodiment of the invention is explained below with reference to the drawing. They show:

[0135] Figure 1 is a perspective oblique view of a hand grinder from the front above with a dust collection container and a round disc tool,

[0136] Figure 2 the hand grinder according to Figure 1 , but without dust collection container,

[0137] Figure 3 the hand grinding machine according to figures 1 , 2 from diagonally behind below,

[0138] Figure 4 the hand grinding machine according to the previous figures from above,

[0139] Figure 5 is a side view of the hand-held grinding machine according to Figures 1 to 4 with a first energy storage device,

[0140] Figure 6 shows the hand-held grinding machine according to Figure 5 in side view, but with a second, smaller energy storage unit,

[0141] Figure 7 shows the hand-held grinding machine according to Figures 5 and 6 in side view from a side opposite to the view in Figures 5 and 6,

[0142] Figure 8 is a top view of the hand grinder according to the preceding figures with a first dust collection container,

[0143] Figure 9 the hand grinder from Figure 8 from behind,

[0144] Figure 10 is a top view corresponding to Figure 8 of a variant of the hand grinder according to the preceding figures with a polygonal disc tool and a second dust collection container, Figure 11 is a rear view of the hand grinder from Figure 10,

[0145] Figure 12 the hand grinder of Figures 4 and 9 with the round disc tool in a view from above with a suction hose,

[0146] Figure 13 shows a variant of the hand-held grinding machine according to Figure 12 in a view from above with a dust removal connection oriented obliquely with respect to a longitudinal axis of the hand-held grinding machine,

[0147] Figure 14 shows a further variant of the hand grinder according to Figures 12, 13 with a dust removal connection at a larger angle than in the hand grinder according to Figure 13,

[0148] Figure 15 shows a bottom view of the hand-held grinding machine according to the preceding figures and an energy storage interface for mounting on the same,

[0149] Figure 16 is an exploded view of the hand grinder according to the preceding figures, viewed diagonally from above,

[0150] Figure 17 shows the exploded view corresponding to Figure 16, but from below,

[0151] Figure 18 the hand grinder according to the preceding figures in partially assembled condition from diagonally above the front,

[0152] Figure 19 the partially assembled hand grinder according to Figure 18 from diagonally behind and below,

[0153] Figure 20 shows another hand-held grinding machine from the rear at the top with an energy storage interface below its dust removal connection, Figure 21 shows the hand-held grinding machine according to Figure 20 with a dust collection container,

[0154] Figure 22 Hand grinder from Figure 21 from diagonally above, and

[0155] Figure 23 shows a variant of the hand-held grinding machine of Figures 20 to 22 with an alternatively arranged dust removal connection.

[0156] In the hand-held grinders 10A, 10B, 10C, and 10D described below, identical or similar components are provided with the same reference numerals. If the respective description applies to all hand-held grinders 10A, 10B, 10C, and 10D, these are also generally referred to as hand-held grinder 10.

[0157] The hand-held grinding machine 10 has a drive motor 11, which drives a tool shaft 13 with a tool holder 14, directly or optionally via a schematically indicated gear 12. A disc tool 40, for example a round disc tool 40A or a polygonal, in particular approximately triangular, disc tool 40B for machining a workpiece WST, can be releasably attached to the tool holder 14, wherein the disc tool 40 could also be permanently connected to the tool holder 14.

[0158] A controller 15, which is configured, for example, as a control module 16, serves to control the drive motor 11. The control module 16 comprises, for example, a circuit board 16A. A switching element 17, which can be operated by an operator, is used to switch the drive motor 11 on and off. Using a further speed switching element 18, the speed of the drive motor 11 can be set by an operator, for example. Using a switching element 19, an electrical function of the hand-held grinding machine 10 can be set, for example.

[0159] A support element 20 is arranged on a suction hood 30. For example, the support element 20 has an annular carrier 21. The support element 20 is arranged between a machine housing 50 of the hand-held grinding machine 10 and a suction hood 23. The suction hood 23 forms a cover 23A for the disc tool 40.

[0160] In an interior of the extraction hood 23, which forms an extraction chamber 24, a bearing body 25 for rotatably supporting the tool shaft 13 is arranged.

[0161] The tool holder 14 is arranged on the tool shaft 13. The tool shaft 13 is rotatably connected to an output of the drive motor 11 or to an output of the gear 12 driven by the drive motor 11 in the fully assembled state of the hand-held grinding machine 10.

[0162] The gear 12 is arranged between the drive motor 11 and the tool holder 14 and can, for example, be provided on the bearing body 25. For example, the gear 12 can be formed by an eccentric bearing or can comprise an eccentric bearing. It is also possible for the bearing body 25 to only rotatably support the tool shaft 13, i.e., for no gear 12 to be present.

[0163] The tool holder 14 protrudes into a preferably hood-shaped interior space 26 of the bearing body 25 and / or is arranged in the interior space 26.

[0164] A disc tool 40, for example a grinding tool or polishing tool, can be releasably attached to the tool holder 14. The disc tool 40 is, for example, a round disc tool 40A or a polygonal, in particular triangular, disc tool 40B.

[0165] For example, bayonet connecting means that can be brought into engagement with one another can be provided on the tool holder 14 and a fastening interface 41 of the plate tool 40. In the exemplary embodiment, however, a screw connection is provided, in particular by means of a fastening element 14A. The fastening element 14A comprises, for example, a screw that can be pushed through a through-opening of the fastening interface 41 and screwed into a screw receptacle of the tool holder 14A. The fastening interface 41 and the tool holder 14 further have rotational driving contours for rotationally driving the plate tool 40 through the tool holder 14.

[0166] The hand-held grinder 10 has a dust removal connection 30 for removing dust-laden air P from the extraction chamber 24. The dust removal connection 30 is fluidly connected to the extraction chamber 24.

[0167] The dust removal connection 30 is arranged, for example, on the extraction hood 23.

[0168] The dust removal connection 30 has, for example, a connection piece 31, which is arranged on an outer side of the extraction hood 23 and is suitable for connecting a suction hose 200 or dust collection containers 300 or 400. The dust collection containers 300 or 400 can be optionally arranged on the hand-held grinding machines 10A, 10B, 10C, 10D.

[0169] The plate tool 40 is essentially accommodated in the suction chamber 24 when mounted on the tool holder 14.

[0170] An annular sealing element 28 is arranged on an outer circumference 27 of the extraction hood 23. The sealing element 28 lies, for example, against or opposite an outer circumference 42 of the disc tool 40, so that a machine side 43 of the disc tool 40 is essentially tightly received in the extraction chamber 24.

[0171] The disc tool 40 has, on opposite sides, the machine side 43 and a processing surface 44 for processing a workpiece W. The processing surface 44 can, for example, comprise an adhesive for attaching a sanding sheet or other abrasive. It is also possible for the processing surface 44 to directly comprise an abrasive or polishing agent that is firmly connected to a base body of the disc tool 40 or formed by it. The processing surface 44 extends in a plane E44. The plane 44 extends, for example, along a flat surface of the workpiece W.

[0172] Between the processing surface 44 and the machine side 43 extend through-flow openings 45 through which the dust-laden air P can flow from the processing surface 44 to the machine side 43, wherein the air P flows in via inlet openings of the through-flow openings 45 arranged on the processing surface 44 and flows out of the through-flow openings 45 into the extraction chamber 46.

[0173] The machine housing 50 has a drive section 51 and a handle section 60.

[0174] The drive section 51 comprises a motor housing 52 for accommodating the drive motor 11. The motor housing 52 comprises an approximately cylindrical peripheral wall 53 and a cover wall 54, which together define a motor receiving space 55 for accommodating the drive motor 11.

[0175] The motor receiving space 55 is designed in the manner of a receiving cylinder or receiving pot, so that the drive motor 11 received in the motor receiving space 55 is supported both with its outer circumference or circumferentially on the circumferential wall 53 and on the front side or with a front side facing away from the tool holder 14 on the cover wall 54.

[0176] The motor housing 55 is closed on opposite sides by the cover wall 54 and, in the assembled state of the hand-held grinder 10, by a cover 56. In this case, the cover 56 is formed by the extraction hood 23 or its hood body.

[0177] The cover 56 serves to close a mounting opening 55E through which the motor receiving space 50 is accessible. The drive motor 11, for example, can be inserted into the motor receiving space 55 through the mounting opening 55E. The cover 56 closes the mounting opening 55E. At this point, it should be noted that the mounting opening 55E advantageously enables an entire drive train as a whole, comprising the drive motor 11 and other drive components, for example the gear 12 and / or the tool shaft 13 and / or the bearing body 25, to be inserted or be insertable through the mounting opening 55E into the motor receiving space 55. The mounting opening 55E is then closed with the cover 56. The installation of the drive motor 11 and components connected to it in the motor receiving space 55 is therefore very simple.

[0178] The cover 56 advantageously holds the drive motor 11 in the motor receiving space 55.

[0179] The drive motor 11 is, for example, held in a sandwich-like manner between the cover wall 54 and the lid 56 when it is arranged in the motor receiving space 55.

[0180] The support element 20 is sandwiched between the suction hood 23 and the machine housing 50. For example, the support element 20 rests against a support wall 57 of the machine housing 50.

[0181] The support wall 57 extends, for example, around an insertion opening of the motor receiving space 55, through which the drive motor 11 can be inserted into the motor receiving space 55.

[0182] The support wall 57 protrudes, for example, radially outward relative to a rotational axis D of the drive motor 11. The rotational axis D of the drive motor 11 forms, for example, a tool axis WA, about which the tool shaft 13 and thus the disk tool 40 are rotationally driven. However, it is also possible for the tool axis WA and the rotational axis D to be angular or parallel to one another, for example, when the gear 12 is designed and provided to convert a rotational movement of the drive motor 11 into an oscillating drive movement of the tool holder 14 or tool shaft 13.

[0183] The support wall 57 protrudes radially outward from the motor housing 51, for example, in the manner of a collar or flange. Ribs 57A can be arranged on the support wall 57, which, for example, define air channels for cooling air for cooling the drive motor 11.

[0184] Furthermore, screw receptacles 57B for screws 23A are preferably arranged on the support wall 57, with which the cover 56 closing the motor receiving space 55, for example the suction hood 23, can be screwed to the machine housing 50

[0185] The peripheral wall 53 of the motor housing 51 can advantageously be completely or partially surrounded by an outer peripheral wall 58.

[0186] For example, a gap 58Z may be present between the peripheral wall 53 and the outer peripheral wall 58, which gap is suitable, for example, for accommodating electrical lines 84 between the control module 16 and the energy storage interface 80. Furthermore, the outer peripheral wall 58 may be configured as a collar that protrudes from the peripheral wall 53 of the motor housing 52. The outer peripheral wall 58 may contribute to stiffening the peripheral wall 53.

[0187] The handle portion 60 comprises a handle body 61 that protrudes from the machine housing 50 transversely to the tool axis WA. The handle body 61 can be grasped by an operator's hand.

[0188] A longitudinal axis L61 of the handle body 61 preferably runs at a right angle to the tool axis WA, but can also have a small angle of, in particular, less than 30°, preferably less than 20° or less than 10° to the tool axis WA. It is preferred if the longitudinal axis L61 of the handle body 61 has an inclination of less than 10° with respect to the machining surface 44. If the longitudinal axis L61 has an inclination with respect to the machining surface 44, a longitudinal end region of the handle body 61 that is further away from the motor housing 52 is preferably arranged further from the plane E44 in which the machining surface 44 is arranged than a longitudinal end region of the handle body 61 that is connected to the motor housing 52.Now, it would be possible in principle for an electrical energy storage device 90 to be held directly on the handle body 61, for example, if an energy storage interface such as the energy storage interface 80 explained below is arranged on the handle body 61. Such an energy storage interface could, for example, be provided on a free end region of the handle body 61 facing away from the motor housing 52.

[0189] In the present case, however, an embodiment is selected in which an energy storage interface 80 is arranged on a connection projection 62 which protrudes from the motor housing 52.

[0190] It would also be possible to provide both, for example, that an energy storage interface 80 is arranged on the connecting projection 62 and also on the handle body 61.

[0191] The connecting projection 62 is opposite the handle body 61, so that a distance exists between the connecting projection 62 and the handle body 61, which distance is configured here as a through-opening 63 or includes a through-opening 63, so that an operator can grasp the handle body 61 through the through-opening 63. The through-opening 63

[0192] The connecting projection 62 is closer to the machining surface 44 than the handle body 61.

[0193] The connecting projection 62, like the handle body 61, projects from the drive section 61 transversely to the tool axis WA in the direction of a machine longitudinal axis LM.

[0194] The machine's longitudinal axis LM runs, for example, through a machine's longitudinal center plane EM of the hand-held grinding machine 10 or the machine housing 50. The machine's longitudinal center plane EM is angled to the machining surface 44, for example, at a right angle. It is advantageous if the rotational axis D of the drive motor 11 and / or the tool axis WA are parallel to the machine's longitudinal center plane EM.

[0195] An operator grasping the hand-held grinding machine 10 at the handle body 61 can guide the hand-held grinding machine 10, for example, in a working direction AR forwards along a workpiece, which is parallel or substantially parallel to the machine's longitudinal axis LM.

[0196] For example, the longitudinal axis L61 of the handle body 61 is perpendicular to the tool axis WA.

[0197] A longitudinal axis L62 of the connecting projection 62 is inclined to the tool axis WA, for example at an angle of approximately 15-30°.

[0198] One longitudinal end of the connecting projection 62 is connected to the motor housing 52 or the drive section 51. Another, opposite longitudinal end of the connecting projection 62 could form a free end in an embodiment of the hand-held grinder 10 or of the invention (not shown), but in the hand-held grinder 10 is connected to a longitudinal end of the handle body 61 facing away from the drive section 51 or the motor housing 52, so that the handle body 61 and the connecting projection 62 form a configuration delimiting the through-opening 63 and / or are supported against one another at their end regions facing away from the drive section 51. Thus, the handle body 61 and the connecting projection 62 mutually stiffen or support one another.

[0199] It is advantageous if the handle body 61 and the connecting projection 62 as a whole have a U-shaped or V-shaped configuration transverse to the machine longitudinal axis LM.

[0200] Together with the motor housing 52, which is enclosed circumferentially by the peripheral wall 53, the handle body 61 and the connecting projection 62 form a rigid machine housing 50 that is optimally suited for the operation of the hand-held grinder. This rigid configuration also makes the machine housing 50 robust against impacts, particularly if the hand-held grinder 10 falls onto a surface.

[0201] The energy storage interface 80 is arranged on a side of the connection projection 62 facing the machining surface 44. The energy storage interface 80 comprises an energy storage holding body 81 for releasably holding the energy storage device 90 and for establishing electrical connections to the energy storage device 90.

[0202] The energy storage holding body 81 is received in a holding body receptacle 70. The energy storage holding body 81 is held in the holding body receptacle 70 in a form-fitting manner.

[0203] The holding body receptacle 70 comprises side walls 71 on which receiving grooves or rear-engaging contours are provided for receiving longitudinal sides 82 of the energy storage holding body 81. Furthermore, holding projections 83 are arranged on the longitudinal sides 82 of the energy storage holding body 81, which engage in holding receptacles 73 of the holding body receptacle 70. The holding receptacles 73 are arranged on the side walls 71. A machine side of the energy storage holding body 81 extending between the longitudinal sides 82 is supported on a base of the holding body receptacle 70.

[0204] It is advantageous if the retaining projections 83 are components of damping members or damping elements, for example, if they are elastically flexible. As a result, the energy storage holding body 81 is held elastically damped on the machine housing 50, so that, for example, vibrations of the drive motor 11 are transmitted to the energy storage device 90 and / or the connection contacts 89 and / or 99 to a lesser extent.

[0205] The holding body receptacle 70 can be closed by a receptacle closure body 75. The receptacle closure body 75 forms a housing part of the machine housing 50. The receptacle closure body 75 has a longitudinal extension oriented in the direction of the machine's longitudinal axis LM. Thus, the receptacle closure body 75 has an elongated shape. The receptacle closure body 75 can be attached to the connecting projection 62 in a joining direction FR transverse to the machine's longitudinal axis LM and screwed to it.

[0206] The receiving closure body 75 and the connecting projection 62 then have aligned top walls 76, 66 and bottom walls 78, 68. The top walls 76, 66 are opposite the handle body 61. The bottom walls 68, 78 and the top walls 66, 76 are arranged on opposite sides of the connecting projection 62 and the receiving closure body 75. The energy storage interface 80, in particular the energy storage holding body 81, is arranged on the bottom walls 78, 68.

[0207] Screw bosses 69 are arranged on the connecting projection 62, which align with screw receptacles 79 when the receiving closure body 75 is arranged on the connecting projection 62. Screws 79A can then be screwed through the screw receptacles 79 into the screw bosses 69. This secures the receiving closure body 75 to the connecting projection 62.

[0208] Furthermore, the receiving closure body 75 is held on the connecting projection 62 by a plug-in arrangement 74.

[0209] The plug-in arrangement 74 comprises plug-in projections 74A that engage in plug-in receptacles 74B. For example, the plug-in receptacles 74B are arranged on the receptacle closure body 75, and the plug-in projections 74A are arranged on the connection projection 62. The reverse configuration is also possible, with plug-in projections being provided on the receptacle closure body 75 that engage in plug-in receptacles on the connection projection 62. The plug-in projections 74A and the plug-in receptacles 74B are arranged next to one another in a row arrangement, in particular along a row axis. This row axis runs, for example, parallel to or inclined at a small angle of less than 10° to the longitudinal axis L62 of the connection projection 62. It is preferred if the plug-in receptacles 74B are formed between the cover wall 76 and a bottom wall forming the bottom 72 of the holding body receptacle 70.

[0210] When the receiving closure body 75 is held on the connecting projection 62, end faces of wall sections of the receiving closure body 75 engage in the manner of plug-in projections 74C in step contours or steps 74D on end faces of wall sections of the connecting projection 62, whereby a further plug-in connection of the plug-in arrangement 74 is realized.

[0211] It is particularly advantageous that the plug-in arrangement 74 is arranged in the region of the holding body receptacle 70 and thus of the energy storage interface 80 for holding the energy storage device 90 and thus ensures a firm hold of the receptacle closure body 75 on the connection projection 62 and of the energy storage holding body 81 in the holding body receptacle 70.

[0212] The connecting projection 62 and the receiving closure body 75 have side walls 67, 77 on opposite sides or sides facing away from each other.

[0213] Steps 64, 65, which are provided on the connecting projection 62 and the receiving closure body 75, contribute to further stiffening of the machine housing 11. The steps 64, 65 are arranged in the region of the through-opening 63. The step 64 is arranged close to the motor housing 52, and the step 65 is arranged at the end region of the connecting projection 62 and the receiving closure body 75 remote from the motor housing 52, where the handle body 61 is connected to the connecting projection 61.

[0214] The motor housing 52 and the connecting projection 62 are provided or arranged in one piece on a housing base body 59A of the machine housing 50. This measure advantageously contributes to the rigidity of the machine housing 50. The housing base body 59A is closed by a housing cover 59B, wherein a receiving space 59C is formed between the housing base body 59A and the housing cover 59B, in which the controller 15, in particular the control module 16, is arranged.

[0215] The handle body 61 is partially formed by the housing cover 59B, namely by a handle section 59I of the housing cover 59B, which closes a handle section 59H of the housing base body 59A protruding from the motor housing 52. The handle body 61 is in two parts and consists of the handle sections 59H and 59I.

[0216] The housing cover 59B is screwed to the housing base body 59A, for which purpose, for example, screws 59F are pushed through through openings 59E of the housing cover 59B and screwed into screw receptacles 59D on the housing base body 59A.

[0217] The basic concept with the energy storage interface 80 on the connection projection 62 also enables a cost-effective laying of electrical cables, for example the cables 84.

[0218] Advantageously, through-openings 59G are provided on the housing cover 59B for the switching elements 17, 18, and 19, through which actuating parts of the aforementioned switching elements 17-19 protrude beyond an outer side of the housing cover 59B and thus an outer surface of the machine housing 50, so that they can be actuated by an operator. The switching element 18 and an electrical component of the switching element 19 are arranged, for example, directly on the circuit board 16A or the control module 16. In the drawing, for example, the switching element 19 is explicitly shown only with its actuating component, which interacts with an electrical component, for example electrical contacts, directly on the control module 16. The switching element 17 is connected to the control module 16 by means of a short electrical line 17A, wherein the line 17A is guided, for example, laterally past the cover 56 of the motor housing 52.At this point, it should be mentioned that the housing cover 59B has a support surface or support contour 59J, which is supported on the top wall 54 of the motor housing 52. This measure also contributes to the stiffening and stable construction of the machine housing 50.

[0219] The energy storage interface 80 has positive-locking contours 88 for engaging positive-locking contours 98 of a connection interface 90A of the energy storage device 90, which are arranged, for example, on the upper side 93 of the energy storage housing 91. The positive-locking contours 88 are arranged at least partially on the energy storage holding body 81.

[0220] The form-fitting contours 88, 98 comprise, for example, longitudinal grooves which extend along a plug-in direction along which the energy storage device 90 with its connection interface 90A can be plugged into the energy storage interface 80.

[0221] When plugged in, the energy storage device 90 can be secured to the energy storage interface 80 using locking means. The locking means include, for example, locking receptacles 88A on the energy storage interface 80, into which locking projections 98A of the connection interface 90A can engage. The locking projections 98A can be disengaged from the locking receptacles 88A by at least one actuating element 98B, for example, at least one pressure actuating element on the long side 94 and / or 95.

[0222] Furthermore, the connection interface 90A has connection contacts 99, in particular plug-in contacts, for example electrical power supply contacts 99A, data contacts 99B, and the like, for electrically contacting connection contacts 89, power supply contacts 89A and data contacts 89B corresponding to contacts 99A, 99B, of the energy storage interface 80, which are also preferably designed as plug-in contacts. The power supply contacts 99A are spaced longitudinally from the data contacts 99B, as are the power supply contacts 89A and the data contacts 89B. The power supply contacts 89A and the data contacts 89B are advantageously arranged on the energy storage holding body 81.

[0223] Thus, the energy storage devices 90, when connected to the energy storage interface 80, can supply the controller 15 and the drive motor 11 with power.

[0224] The energy storage device 90 can be attached to the energy storage interfaces 80 of the hand-held grinding machines 10A, 10B, 10C, and 10D. The energy storage device 90 contains storage cells SP, for example, battery cells, which can provide electrical energy and are rechargeable.

[0225] The energy storage device 90 is presented below in a variant 90A and a variant 90B, with the electrical capacity and performance of the variant 90A being greater than that of the energy storage device 90B, which has fewer storage cells SP than the energy storage device 90A. The energy storage devices 90A and 90B can be used optionally on the hand-held grinding machines 10A, 10B, 10C, and 10D.

[0226] For example, three layers of storage cells SP are shown for energy storage device 90A and two layers of storage cells SP for energy storage device 90B. Both energy storage device 90A and energy storage device 90B may have more or fewer layers of storage cells SP arranged one above the other. For example, in energy storage device 90A, three or more storage cells SP are arranged in a direction perpendicular to plane E44, while in energy storage device 90B, only a single storage cell SP or a maximum of two storage cells SP are arranged one above the other perpendicular to plane E44.

[0227] An energy storage housing 91 of the energy storage device 90 accordingly has variants 91A and 91B, wherein the energy storage housing 91A accommodates more storage cells SP than the energy storage housing 91B. For example, distances between a bottom 92 and a top 93 of the energy storage housings 91A and 91B are of different sizes. For the sake of simplicity, both energy storage housings 91A, 91B are described below as energy storage housing 91.

[0228] Longitudinal sides 94, 95 extend between the undersides 92 and upper sides 93 of the energy storage housing 91, with the long side 94 facing the machine housing 50 and the long side 95 forming a free long side when the energy storage device 90 is fastened to the machine housing 50. Furthermore, a front side 97 and a rear side 96 extend between the upper side 93 and the underside 92, with the rear side 96, when the energy storage device 90 is mounted on the energy storage interface 80, being further away from the plate tool 40 than the front side 97, which is arranged closer to the plate tool 40. This results in a favorable center of gravity.

[0229] The suction hose 200 and the dust collection containers 300, 400 have connecting elements 201, 301 and 401, for example tubular or sleeve-shaped connecting elements, with which the suction hose 200 or the dust collection container 300, 400 can be connected to the connecting piece 31.

[0230] The dust removal connection 30, in particular the connecting piece 31, extends along a longitudinal axis L30. The connecting piece 31 defines a flow channel 33 that extends along the longitudinal axis L30.

[0231] Thus, the respective connection element 201, 301, and 401 also extends along the longitudinal extension axis L30 when plugged into the connection piece 31. A section of the suction hose 200 connected to the connection element 201 also has an orientation or longitudinal extension that is parallel to the longitudinal extension axis L30 or at a small angle to it, for example, of a maximum of 15°, in particular a maximum of 10°, or particularly preferably a maximum of 5°. Thus, the suction hose 200, in the vicinity of the dust removal connection 30, has an orientation corresponding to the longitudinal extension axis L30. The connection elements 201, 301, and 401 are oriented rearward in the working direction AR.

[0232] The connection elements 301 and 401 are arranged on front sides 307 and 407 of the dust collection containers 300 and 400. On opposite rear sides 306 and 406, the dust collection containers 300 and 400 advantageously have removal openings 308 and 408 for removing dust accumulated in the interiors of the dust collection containers 300 and 400. Extending between the front sides 307 and 407 are longitudinal sides 304 and 404, which face the machine housing 50, and longitudinal sides 305 and 405, which face away from the machine housing 50 when the respective dust collection container 300 or 400 is attached to the dust removal connection 30. Between the longitudinal sides 304 and 305 and 404 and 405 extend a bottom side 302, 402 closer to the processing surface 44 and a top side 303 and 403 further away from the processing surface 44 of a respective dust collection container 300 or 400 when the latter is arranged on the dust removal connection 30.

[0233] The energy storage interface 80 has a favorable position on the machine housing 50 with respect to the processing surface 44 and with respect to the dust removal connection 30, which becomes clear below:

[0234] The energy storage interface 80 is arranged on the machine housing 50 such that the energy storage device 90 is closer to the processing surface 44 than the dust removal connection 30. The undersides 92 of the energy storage devices 90A, 90B have minimum energy storage distances SEA, SEB perpendicular to the plane E44 in which the processing surface 44 is arranged, which are smaller than a dust removal connection distance SA of the dust removal connection 30 with respect to this plane E44 or the processing surface 44. Thus, the respective energy storage device 90A, 90B extends very close to the processing surface 44, resulting in a favorable center of gravity of the hand-held grinding machine 10A, 10B.

[0235] Figure 9 shows an alternative arrangement of a dust removal connection 30B which is somewhat further away from the processing surface 44 and has a dust removal connection distance SAB to the processing surface 44, perpendicular to a plane in which the processing surface 44 runs.

[0236] Furthermore, the energy storage interface 80 is not symmetrical to the machine longitudinal axis LM or the machine longitudinal center plane EM, in which the machine longitudinal axis LM extends, but asymmetrical.

[0237] As a result, for example, an energy storage longitudinal center plane EE has a transverse distance QE to the machine longitudinal center plane EM.

[0238] This transverse distance QE is so large that the energy storage device 90 is arranged almost entirely laterally next to the machine's longitudinal center plane EM, see in particular Figures 9 and 11.

[0239] The dust removal connection 30 or 30B is also not arranged symmetrically in the middle of the machine's longitudinal center plane EM, but has a transverse distance QS to it.

[0240] A dust removal connection longitudinal center plane E3 of both dust removal connections 30 and 30B, parallel to the machine longitudinal center plane EM, is arranged at the transverse distance QS to the machine longitudinal center plane EM.

[0241] This results in a configuration in which the dust removal connection 30 and the energy storage device 90 are arranged on opposite sides of the machine's longitudinal center plane EM.

[0242] However, the energy storage device 90 and the dust removal connection 30 do not protrude laterally in front of the plate tool 40 with respect to the machine longitudinal axis LM or the machine longitudinal center plane EM, which can be seen in Figures 8-11.

[0243] The disc tool 40A, 40B is arranged within a corridor KO with respect to the machine's longitudinal axis LM and / or the machine's longitudinal center plane EM, which corridor is delimited by lateral corridor planes KL and KR, beyond which the disc tool 40A or 40B does not protrude transversely to the machine's longitudinal axis LM or the machine's longitudinal center plane EM. The planes KL and KR are parallel to the machine's longitudinal center plane EM and / or perpendicular to the machining surface 44 or the plane E44 in which the machining surface 44 extends. The energy storage device 90 and the dust removal connection 30 are located between the planes KL and KR.

[0244] However, it is also possible for a disc tool 40C with a smaller diameter than the disc tool 40A, in particular a round disc tool, to be arranged on the hand-held grinding machine 10 (Figure 9). In this case, the corridor planes KL and KR are closer together, and the corridor KO is therefore narrower.

[0245] In Figure 9, for example, it can be seen that the energy storage device 90B protrudes with its longitudinal side 95 at a distance Q1 from the corridor plane KL. The longitudinal side 95 extends, for example, in a plane K95 parallel to the machine's longitudinal center plane EM, which is at a distance Q1 from the corridor plane KL.

[0246] Although the energy storage device 90B is arranged asymmetrically with respect to the machine's longitudinal center plane EM, the distance Q1 is small, for example a maximum of 15 mm, in particular a maximum of 10 mm, preferably a maximum of 5 mm or, in other words, the distance Q1 is a maximum of 15%, in particular a maximum of 10%, particularly preferably a maximum of 8% of the diameter of the plate tool 40C.

[0247] An outer side 35 of the dust removal connection 30, facing away from the machine housing 50, extends in a plane K35 that is parallel to the machine's longitudinal center plane EM. The dust removal connection 30, in particular its side 35, does not protrude beyond the corridor plane KR.

[0248] The longitudinal side 405 of the dust collection container 400 extends in a plane K405 that is parallel to the machine's longitudinal center plane EM. The dust collection container 400, with its longitudinal side 405 facing away from the machine housing 50, projects in front of the disc tool 40C and / or the corridor plane KR by a transverse distance Q2. Therefore, the transverse distance Q2 exists between the corridor plane KR and the plane K405. The transverse distance Q2 is, for example, a maximum of 20%, in particular a maximum of 15%, preferably a maximum of 10% of the diameter of the disc tool 40C.

[0249] The dust removal channel or flow channel 33 provides the suction hose 200 with a direction corresponding to its longitudinal axis L30. Figure 12 shows that the suction hose 200 arranged at the dust removal connection 30 is also oriented in the direction of the longitudinal axis L30 within its sphere of influence close to the dust removal connection 30, and thus within the corridor between the planes KL and KR.

[0250] However, if longitudinal extension axes L30 of flow channels of dust removal connections 30C and 30D extend at an angle to the machine's longitudinal center plane EM or the machine's longitudinal axis LM, namely, they have an angle of W1 or W2 to it, respectively, the section of the suction hose 200 connected to the respective dust removal connection 30C or 30D is positioned in front of one of the corridor planes, namely the corridor plane KR. Nevertheless, even in this situation, the asymmetrical arrangement of the energy storage device 90 with respect to the machine's longitudinal center plane EM has an advantage, namely that a large amount of space is available for the suction hose 201 on the side of the machine's longitudinal center plane EM facing away from the energy storage device 90.

[0251] Hand-held grinding machines 10E (Figures 20-22) and 10F (Figure 23) have machine housings 50E, 50F, which are essentially similar to machine housings 50, but have differently arranged energy storage interfaces and dust removal connections 30E and 30F. Hand-held grinding machines 10E and 10F also have drive motors (not visible in the drawing) similar to drive motor 11, with which disc tools 40 are driven or drivable. In hand-held grinding machine 10E, the energy storage interface is arranged such that the energy storage device 90 arranged on the machine housing 50E, for example in variant 90A, is located completely below the dust removal connection 30E.A bottom side 32 of the dust removal connection 30E has a dust removal connection distance SAE, and a bottom side 92 of the energy storage device 90 has an energy storage distance SEE relative to a plane in which the machining surface 44 extends, wherein the dust removal connection distance SAE is significantly greater than the energy storage distance SEE. The dust removal connection 30E is arranged entirely above the top side 93 of the energy storage device 90.

[0252] In order to convey dust air (indicated by black arrows) from the disc tool 40 in the direction of the dust removal connection 30E, the hand-held grinding machine 10E has a flow channel 33E which runs from the disc tool 40 to the dust removal connection 30E through the machine housing 50E.

[0253] The hand-held grinding machine 10F also has a flow channel that runs through its machine housing 50F, namely a flow channel 33E. The flow channel 33E opens into a dust removal connection 30F, which is arranged at least substantially above the top side 93 of the energy storage device 90 arranged at the energy storage interface of the hand-held grinding machine 10F. A bottom side 32 of the dust removal connection 30F has a dust removal connection distance SAF, and a bottom side 92 of the energy storage device 90 has an energy storage distance SEF with respect to a plane in which the machining surface 44 extends, wherein the dust removal connection distance SAF is greater than the energy storage distance SEF.

[0254] In the hand-held grinding machines 10E and 10F, it is advantageously provided that an energy storage longitudinal center plane (not shown in the drawing) of the respective energy storage device 90 has a transverse distance from the machine's longitudinal center plane EM. This can be seen by comparing Figures 21 and 22. While the dust removal connection 30E is arranged symmetrically to the machine's longitudinal center plane EM, the dust removal connection 30F is arranged asymmetrically thereto; see Figure 23.

[0255] Variants of the energy storage interface 80 are schematically indicated in Figures 8 and 9. For example, an energy storage interface 80E can have energy storage interface connections 80E1 and 80E2, to which energy storage devices 90E1 and 90E2 can be detachably mounted. The energy storage interface connections 80E1 and 80E2 are, for example, both arranged asymmetrically next to one another to the side of the machine's longitudinal center plane EM, so that the energy storage interface 80E is completely asymmetrical with respect to the machine's longitudinal center plane EM. However, it is also possible, for example, for the energy storage interface connection 80E1 to be completely to the side of the machine's longitudinal center plane EM, while the energy storage interface connection 80E2 is partially penetrated by the machine's longitudinal center plane EM.For example, the machine longitudinal center plane EM can run transversely centrally or approximately transversely centrally with respect to the energy storage interface connection 80E2.

[0256] Alternatively, an embodiment is also possible in which the energy storage interface connections are arranged one behind the other in a row direction along a line that runs approximately parallel to the machine's longitudinal center plane EM or has a slight inclination thereto, for example in the manner of the dust collection container 300 according to Figure 10. Such an embodiment is indicated in Figure 8 with energy storage interface connections 80F1 and 80F2 of an energy storage interface 80F, to which, for example, the energy storage devices 90E1 and 90E2 can be connected.

[0257] Combinations of the two aforementioned embodiments are also readily possible, ie, for example, a combination of the energy storage interface connections 80F1 and 80E2 is provided, so that a staged arrangement of energy storage interface connections is realized.

Claims

Claims 1. A hand-held grinding machine comprising a disc tool (40) with a machining surface (44) for machining a workpiece (WST), and a machine housing (50) in which a drive motor (11) for driving a tool holder (14) on which the disc tool (40) is arranged is arranged, wherein the machine housing (50) has a drive section (51) with a motor housing (52) which has a motor receiving space (55) in which the drive motor (11) is received, wherein the motor housing (52) has a one-piece circumferential wall (53) annularly enclosing the motor receiving space (55), characterized in that a connecting projection (62) extending along a longitudinal axis (LM) of the machine housing (50) and, in particular, being one-piece with the machine housing (50) is arranged on the circumferential wall (53),on which an energy storage interface (80) is arranged for the detachable connection of an electrical energy storage device (90) for the electrical power supply of the hand grinding machine (10).

2. Hand grinding machine according to claim 1, characterized in that it has a handle section (60) by which the hand grinding machine can be grasped by an operator and can be guided along the workpiece (WST) in a working direction (AR), in particular parallel or with a directional component parallel to the machine longitudinal axis (LM) of the machine housing (50), wherein the connecting projection (62) and / or at least a part of the handle section (60) project rearward from the motor housing (52) in the working direction (AR).

3. Hand grinding machine according to claim 1 or 2, characterized in that the handle section (60) is attached to a component arranged on the machine housing (50), in particular at least partially integrated with the machine housing (50). a sectional, handle body (61) is arranged, which extends rearward in the working direction (AR) from the motor housing (52).

4. Hand grinding machine according to claim 3, characterized in that the handle body (61 ) is supported by the connecting projection (62) or that the connecting projection (62) forms the handle body (61 ) wholly or partially.

5. Hand grinding machine according to claim 3 or 4, characterized in that the handle body (61 ) and the connecting projection (62) are directly connected to each other at an end area facing away from the motor housing (52) and / or are connected to each other in the area of ​​the motor housing (52) by the motor housing (52).

6. Hand grinding machine according to one of claims 3, 4 or 5, characterized in that a through-reach opening (63) is provided between the handle body (61 ) and the connecting projection (62), which can be grasped by a hand of an operator grasping the handle body (61 ).

7. Hand grinding machine according to one of claims 3 to 6, characterized in that the handle body (61 ) and the connecting projection (62) have or form an overall approximately V-shaped or U-shaped shape transverse to the longitudinal axis (LM) of the machine.

8. Hand grinding machine according to one of claims 3 to 7, characterized in that the handle body (61 ) and the connecting projection (62) have opposing wall sections which extend transversely to the longitudinal axis (LM) of the machine, wherein a transverse width of the wall section of the connecting projection (62) is at least 80%, preferably at least 90%, of the transverse width of the wall section of the handle body (61 ) in the area of ​​the machine housing (50).

9. Hand grinding machine according to one of the preceding claims, characterized in that the energy storage interface (80) has one of the connecting projection (62) has a separate energy storage retaining body (81) for positively locking the energy storage (90), wherein the energy storage retaining body (81) is received in a retaining body receptacle (70) arranged on the connecting projection (62).

10. Hand grinding machine according to claim 9, characterized in that the holding body receptacle (70) is closed by a receiving closure body (75), in particular designed as a housing part, which is detachably connected or connectable to the connecting projection (62), in particular screwable.

11. Hand grinding machine according to claim 10, characterized in that the receiving closure body (75) is attached to the connecting projection (62) with a joining direction (FR) transverse to the machine longitudinal axis (LM) and / or a support area of ​​the receiving closure body (75), with which the receiving closure body (75) is supported on the connecting projection (62), has a greater longitudinal extent with a directional component parallel to the machine longitudinal axis (LM) than transverse, in particular perpendicular transverse, to the machine longitudinal axis (LM).

12. Hand grinding machine according to claim 10 or 11, characterized in that a plugging arrangement (74) with at least one plugging projection (74A) and a plugging receptacle (74B) receiving the plugging projection (74A) is arranged on the receiving closure body (75) and the connecting projection (62), which engage in each other in the state of the receiving closure body (75) being mounted on the connecting projection (62) and / or are supported against each other in a centering manner in the sense of centering the receiving closure body (75) on the connecting projection (62).

13. Hand grinding machine according to claim 12, characterized in that the plug-in arrangement (74) comprises a series arrangement of several plug-in projections and plug-in receptacles (74B) which are in engagement with each other in the state of the receiving locking body (75) mounted on the connecting projection (62), and / or at least one plug receptacle (74B) of the plug assembly (74) is formed by spaced-apart wall sections, one of which is opposite the energy storage retaining body (81), in particular for its support, and the other wall section forms an outer wall of the connection projection (62), and / or at least one plug receptacle (74D) of the plug assembly (74) is formed by a step (74D) or receiving groove into which a plug projection (74C) engages, wherein the step (74D) or receiving groove and the plug projection (74C) are arranged on end faces of walls of the connection projection (62) and the receiving closure body (75).

14. Hand grinding machine according to one of the preceding claims, characterized in that the energy storage interface (80), in particular the energy storage holding body (81), has an elongated shape and extends along the connection projection (62) and / or has form-fitting contours (88) extending along its longitudinal extent, in particular longitudinal grooves and / or longitudinal projections, and / or locking means for securing the energy storage device (90) and / or has connection contacts (89A) arranged closer to the motor housing (52) and connection contacts (89B) for the energy storage device (90) arranged further away from the motor housing (52), in particular at its longitudinal end region furthest from the motor housing (52).

15. Hand grinding machine according to one of the preceding claims, characterized in that the energy storage device (90), when arranged at the energy storage interface (80), does not protrude or protrudes to a maximum of 20%, in particular a maximum of 10%, preferably a maximum of 5% of its longitudinal extension length beyond a longitudinal end of the connecting projection (62) and / or the handle body (61) facing away from the motor housing (52).

16. Hand grinding machine according to one of the preceding claims, characterized in that a wall section of the connecting projection (62) extending along the longitudinal axis (LM) of the machine has a step (64, 65) transverse to the longitudinal axis (LM) of the machine.

17. Hand grinding machine according to one of the preceding claims, characterized in that the motor housing (52) has a cover wall (54) closing the motor receiving space (55) at the front, in particular being integral with the circumferential wall (53).

18. Hand grinding machine according to one of the preceding claims, characterized in that the motor receiving chamber (55) is closed or can be closed by a cover (56) which can be detachably connected to the motor housing (52).

19. Hand grinding machine according to claim 18, characterized in that the lid (56) is formed by a cover (23A) and / or an extraction hood (23) for the disc tool (40).

20. Hand grinding machine according to one of claims 18 or 19, characterized in that the motor receiving space (55) extends between the cover wall (54) and the lid (56).

21. Hand grinding machine according to one of claims 18 to 20, characterized in that the cover (56) is provided for closing a mounting opening (55E) through which the drive motor (11) can be inserted into the motor receiving space (55) and / or the motor receiving space (55) is accessible exclusively by removing the cover (56) for inserting the drive motor (11).

22. Hand grinding machine according to one of the preceding claims, characterized in that a support wall, in particular collar-like and / or flange-like and / or integral with the circumferential wall (53), projects outwards on a side of the circumferential wall (53) facing away from the motor receiving space (55).

23. Hand grinding machine according to one of the preceding claims, characterized in that the connecting projection (62), in particular a The section of the connecting projection (62) opposite the handle body (61) is supported on the retaining wall and / or is integral with the retaining wall.

24. Hand grinding machine according to one of the preceding claims, characterized in that the machine housing (50) has a housing base body (59A) which integrally comprises the motor housing (52) and the connecting projection (62), in particular also the handle body (61), wherein the housing base body (59A) is closed or can be closed by a housing cover (59B).

25. Hand grinding machine according to claim 24, characterized in that the housing cover (59B) extends over the entire or substantially the entire longitudinal axis (LM) of the machine housing (50), in particular the housing base body (59A).

26. Hand grinding machine according to claim 24 or 25, characterized in that the housing cover (59B) forms a component of the handle section (60), in particular the handle body (61).

27. Hand grinding machine according to one of claims 24 to 26, characterized in that the housing cover (59B) and the connecting projection (62) are arranged on opposite sides of the handle body (61) and / or that the connecting projection (62) is arranged closer to the disc tool (40) than the housing cover (59B).

28. Hand grinding machine according to one of claims 24 to 27, characterized in that the housing cover (59B) covers the motor housing (52) on a side of the machine housing (50) facing away from the disc tool (40), in particular completely.

29. Hand grinding machine according to one of claims 24 to 28, characterized in that the housing cover (59B) closes a receiving space (59C), in particular for a control (15), in particular a control module (16), of the hand grinding machine (10).

30. Hand grinding machine according to claim 29, characterized in that at least one switching element (17, 18, 19) operable by an operator, preferably all switching elements (17, 18, 19), for switching electrical functions of the hand grinding machine (10) that can be influenced by the control (15) is arranged in the receiving space (59C) and / or at least one switching element (17, 18, 19) is arranged on a circuit board (16A) or a control module (16) of the control (15).

31. Hand grinding machine according to one of claims 24 to 30, characterized in that the housing base body (59A) is made of a harder material than the housing cover (59B) and / or the housing cover (59B) has at least one elastic or soft or damping component on its outer surface facing away from the housing base body (59A) and / or the housing base body (59A) is made of fewer materials than the housing cover (59B), in particular only of a single material.

32. Hand grinding machine according to one of claims 24 to 31, characterized in that the housing cover (59B) and the receiving locking body (75) do not have direct contact.

33. Hand grinding machine according to one of claims 24 to 32, characterized in that the housing cover (59B) is opposite the cover wall (54) closing the motor receiving space (55) and / or completely or partially covers the cover wall (54).

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