AU2022291460A1

AU2022291460A1 - Electric hand tool

Info

Publication number: AU2022291460A1
Application number: AU2022291460A
Authority: AU
Inventors: Simon Frohnauer
Original assignee: Einhell Germany AG
Current assignee: Einhell Germany AG
Priority date: 2021-12-21
Filing date: 2022-12-20
Publication date: 2023-07-06
Anticipated expiration: 2042-12-20
Also published as: EP4201595A1; AU2022291460B2; DE202021106961U1

Abstract

An electric hand tool is to be provided, in which the cooperation between transmission unit and coupling unit is optimized. Thereto, an electric hand tool (10) is proposed, 5 which comprises: a housing (14) with a drive unit (32) arranged therein, which drives a motor shaft (34) rotating around a rotational axis, a transmission unit (40) mechanically coupled to the drive unit (32) and an insert holder (78) mechanically coupled to the transmission unit (40) for receiving a tool insert, as well as a coupling unit (58), which is intended to couple a torque of the transmission unit (40) to the 0 insert holder (78). The transmission unit (40) is constituted by a planetary transmission (42), wherein the planetary transmission (42) includes a planetary carrier (46), which comprises a projection, on the side facing the coupling unit (58), with catch elements (54) provided thereon. The coupling unit (58) includes a coupling element (60) with at least one recess (62), with which the projection (52) of the 5 planetary carrier (46) engages with the catch elements (54) provided thereon. 19315015_1 (GHMatters) P120670.AU 2/3 Fig. 2 34 36 - 38 40,42 44 48 80 8 52 76 70 58 72 66 74 68 20 78

Description

2/3

Fig. 2 34

36 - 38 ,42 44 48

80 8 52 76 70 58 72 66 74

68 20

ELECTRIC HAND TOOL

The present application claims priority from German Utility Model Application No. 20 2021 106 961.9 (entitled "Elektrisches Handwerkzeug"), the entire contents of which is incorporated herein by reference.

The present invention relates to an electric hand tool, such as a drywall screwdriver. In one aspect, the present invention provides an electric hand tool, such as a drywall screwdriver, with the features of the independent claim 1.

Electric hand tools such as for example drywall screwdrivers are usually used to connect two materials such as for example plasterboard, wood or metal to each other or also to attach material. Drywall screwdrivers are usually characterized by their high rotational speeds and the adjustable depth stop such that a high number of screws can be countersunk within shortest time with consistent screw-in depth.

As known, electric hand tools are equipped with a drive unit, by means of which an insert holder can be driven rotating around a rotational axis via a transmission unit and via a coupling unit. However, there is often the disadvantage in the known drywall screwdrivers that the torques of the drive unit are not satisfactorily transferred to the insert holder, whereby an inferior result in screwing finally occurs.

Therefore, the present invention is based on the object to provide an electric hand tool, in which the cooperation between transmission unit and coupling unit has been ?5 optimized to achieve a better torque transfer and thus also a better result in screwing.

The mentioned object is solved by the electric hand tool with the features of the independent claim. Further advantageous configurations and developments of the invention are specified in the respectively dependent claims.

The invention relates to an electric hand tool, in particular a drywall screwdriver. The electrical hand tool comprises a housing with a drive unit arranged therein, which drives

19315015_1 (GHMatters) P120670.AU a motor shaft rotating around a rotational axis. The housing of the hand tool machine can include a drive housing and a transmission housing.

The drive unit of the electric hand tool can be constituted by an electric motor. The electric motor can be constituted by a brushless electric motor or by a brush motor.

The electric hand tool comprises a transmission unit mechanically coupled to the drive unit and an insert holder mechanically coupled to the transmission unit for receiving a tool insert.

For example, a bit insert or the like can be conceivable as the tool insert. For receiving such a tool insert, the insert holder can comprise an at least substantially cylindrical receiving space frontally open on a narrow side, into which the respective tool insert can be introduced or inserted from outside of the hand tool.

Moreover, the electric hand tool comprises a coupling unit. The coupling unit is intended to couple and/or decouple a torque of the transmission unit to or from the insert holder.

In particular, with corresponding pressure on the hand tool, which is for example applied by an operator of the electric hand tool in screwing a screw into a material, the coupling unit can couple in such that a torque of the transmission unit can be transferred to the insert holder. Thereby, the tool insert inserted into the insert holder can be driven rotating around a rotational axis longitudinally extending centrally through the insert holder by the drive unit by means of the transmission unit. Preferably, the ?5 rotational axis of the insert holder can extend aligned or collinear with the rotational axis of the motor shaft rotationally driven by the drive unit.

Upon reaching a certain screw-in depth, the coupling unit can again be decoupled such that the torque transfer of the transmission unit to the insert holder is prevented.

In the electric hand tool, it is further provided that the transmission unit is constituted by a planetary transmission, wherein the planetary transmission includes a planetary

19315015_1 (GHMatters) P120670.AU carrier, which comprises a projection with catch elements provided thereon on the side facing the coupling unit.

Moreover, it is provided that the coupling unit includes a coupling element with at least one recess, with which the projection of the planetary carrier engages with the catch elements provided thereon. Thus, the planetary carrier can directly cooperate with the coupling element without any further components such that the torque of the drive unit can finally also be directly, fast and reliably transferred to the insert holder with the coupling unit coupled-in.

It is also advantageous that a form-fit connection can be formed by the engagement of the projection of the planetary carrier with the recess of the coupling element. In this respect, further mechanical connection components or the like can be omitted.

Moreover, it is advantageous in the electric hand tool that the planetary carrier and the coupling element are composed of different components. This can in particular be advantageous to the effect that the entire assembly does not have to be exchanged in case of wear and/or in maintenance works, but it can be sufficient to only exchange the affected component. This saves the resources and the cost in repair can be kept as low as possible at the same time.

It can be provided in the electric hand tool that the at least one recess of the coupling element corresponds to an outer contour of the projection, arranged on the planetary carrier, with the catch elements provided thereon. In particular, the recess can be ?5 shaped such that the coupling element can be completely guided, in particular fitted, onto the projection. Therein, the projection of the planetary carrier can axially protrude through and beyond, respectively, the recess of the coupling element, namely such that the projection with the coupling element arranged thereon axially protrudes or projects from it.

Furthermore, it can be provided that the projection extends axially from the side of the planetary carrier facing the coupling element. The projection can have a cylindrical

19315015_1 (GHMatters) P120670.AU shape, a conical shape, a pyramidal shape or the like. The projection of the planetary carrier can be formed hollow at least in sections. In particular, the projection can include and provide a receptacle on the front side, i.e. in the direction of the coupling unit, into which the tool holder is inserted.

Moreover, it can be provided that the projection of the planetary carrier comprises at least two catch elements, preferably three or also more catch elements. The catch elements can serve for transferring the torque from the drive unit to the coupling element such that the coupling element is consequently driven rotating around a rotational axis longitudinally extending centrally through the insert holder.

Furthermore, it can be provided that the projection of the planetary carrier comprises an outer lateral surface, from which the catch elements extend radially outwards. In particular, the catch elements can extend radially outwards to the outer edge of the planetary carrier.

It can be provided that the catch elements have a spherical shape, cylindrical shape, cuboid shape or the like. The shapes of the catch elements mentioned here are not to be comprehended restrictive. Of course, the catch elements can have any further shape, which is reasonable for torque transfer to the coupling element.

According to an embodiment, the planetary carrier can preferably be composed of one component or be integrally formed with its projection and the catch elements provided thereon. For example, the planetary carrier can be formed of a milled part, 3D printed ?5 part and/or plastic part. Hereby, the cost for the manufacture and/or production of the planetary carrier can be kept lower and also the overall cost for the drywall screwdriver can thus be kept low. In addition, such a planetary carrier can also be less susceptible to wear.

According to a further embodiment, the catch elements can also be arranged on the outer lateral surface of the projection by means of a force-fit, form-fit and/or firmly bonded connection, i.e. the catch elements can be separate components, which can be

19315015_1 (GHMatters) P120670.AU correspondingly attached to the outer lateral surface of the projection. Here, it would even be conceivable that the catch elements can be exchanged in individual manner and upon need or upon wear.

Moreover, it can be provided in the electric hand tool that the planetary transmission is formed single-stage. Preferably, the planetary transmission can include a sun gear, which is directly or indirectly driven rotating around a rotational axis by the motor shaft of the drive unit.

O At least three studs can be associated with the planetary carrier on the side facing the drive unit, wherein a planetary gear is associated with each stud. The planetary gears can in particular be arranged and/or retained on the planetary carrier via the studs such that the movement of the sun gear can be transferred to the planetary gears. By rotating the planetary gears, the planetary carrier as such can in turn be set into rotation. Preferably, the studs can have a cylindrical shape.

According to an embodiment, the planetary carrier can include depressions on the side facing the drive unit. The studs can respectively be inserted into the depressions, i.e. the depressions can have a cross-section, which is corresponding to the cross-section of the studs.

According to an embodiment, the depressions can be open on one side, i.e. the depressions can protrude into the planetary carrier at least in sections. In particular, the depressions can be formed such that they can receive the studs, preferably in clamping ?5 manner, at least in sections. For example, the depressions can be formed by a blind hole.

According to a further embodiment, the depressions can also be continuously formed such that the depressions are formed respectively open on both sides; i.e. the depressions can axially completely protrude through the planetary carrier, which means that the depressions are respectively for example formed as a through-hole. Here too, the studs can be retained in clamping manner by the respective depressions.

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According to a further embodiment, it can also be conceivable that the at least three studs are fixedly or permanently associated with the planetary carrier. For example, firmly bonded, force-fit and/or form-fit connections between the studs and the planetary carrier can be suitable hereto.

Alternatively, the planetary carrier and the studs can also be formed of one component, in particular in integral manner.

O The planetary transmission can be supported by a ring gear, wherein the ring gear is substantially non-rotatably or rotationally fixedly arranged in the outer housing of the electric hand tool. This can be achieved in that the ring gear comprises at least one or more knobs on its outer circumference. The knobs can be engaged with an inner lateral surface of the housing. Moreover, the ring gear can comprise an internal toothing, along which the planetary gears can rotate.

The advantage in the single-stage planetary transmission is in that the electric hand tool can be compactly constructed. Due to the load distribution to multiple planetary carriers, it is also possible that high torques can be transferred to the insert holder despite of the compact construction. Moreover, a change of the gear ratio can be allowed by the planetary transmission without dissociation of the flux of force.

Furthermore, the electric hand tool can include a screw-in depth limiting element, via which a screw-in depth can be adjusted. The screw-in depth limiting element can be ?5 brought into various positions by the operator of the electric hand tool to limit a screw-in depth for example to a value corresponding to the respective position. For adjusting the screw-in depth, the screw-in depth limiting element can for example be equipped with an internal thread and be rotatable around it. Alternatively, the screw-in depth limiting element can also provide a lock with multiple locking positions to adjust the screw-in depth.

19315015_1 (GHMatters) P120670.AU

Furthermore, it can be provided that the coupling element is largely flatly formed on the side facing the planetary carrier, while it comprises catches on the side facing away from the planetary carrier. The catches can for example axially extend from the side facing away from the planetary carrier and for example be formed as knobs, elevations or the like.

Moreover, the coupling unit can include additional coupling elements, in particular a further coupling element and a coupling element fixed to the insert holder. The further coupling element can comprise first catches on the side facing the coupling element, which are formed corresponding to the catches of the coupling element. In particular, the further coupling element can be formed axially movable along the insert holder and the projection of the planetary carrier. In addition, the further coupling element can rotate around a rotational axis, which extends collinear with the rotational axis of the planetary carrier and of the coupling element, respectively. The catches of the coupling element and the first catches of the further coupling element can in particular engage or couple in when an operator presses the drywall screwdriver axially against a workpiece for countersinking or screwing in an attachment means.

On the side facing away from the coupling element and on the side facing the fixed coupling element, respectively, the further coupling element can comprise second catches.

The fixed coupling element can also comprise further catches on the side facing the further coupling element, which are formed corresponding to the second catches of the ?5 further coupling element. The further coupling element and the fixed coupling element can in particular engage when the coupling unit is decoupled.

Moreover, it can be provided that the coupling unit is mounted by a bearing unit at least in sections. The bearing unit can be constituted by a ball bearing or the like. The bearing unit can in particular serve for rotationally mounting the coupling element.

19315015_1 (GHMatters) P120670.AU

In the following, embodiments are to explain the invention and its advantages in more detail based on the attached drawings. The size ratios of the individual elements to each other in the figures do not always correspond to the real size ratios since some shapes are simplified and other shapes are illustrated enlarged in relation to the other elements for better illustration.

Fig. 1 shows an electric hand tool, which is formed as a drywall screwdriver, in a perspective view.

Fig. 2 shows an area of the electric hand tool illustrated in figure 1 in a schematically sectioned side view.

Figs. 3A and 3B show the planetary carrier and the coupling element in various perspectives and views.

For identical or identically acting elements of the invention, identical reference characters are used. Further, only reference characters are illustrated in the individual figures for the sake of clarity, which are required for the description of the respective figure. The illustrated embodiments only represent examples how the device according to the invention can be configured and do not represent a conclusive restriction.

The figure 1 shows an electric hand tool 10 in a perspective view, which is constituted by a battery-operated drywall screwdriver 12. The drywall screwdriver 12 comprises a housing 14, which is for example formed of a plastic material or of a plastic material ?5 and/or metallic material at least in certain areas.

The housing 14 is composed of a drive housing 16 with a holding and/or gripping area 22 and a transmission housing 20. The drive housing 16 is composed of two shell-like housing halves 18, 18', which are connected to each other via locking and/or screwing and/or clamping connections not illustrated here. The transmission housing 20 is frontally fitted to an end of the drive housing 16.

19315015_1 (GHMatters) P120670.AU

The holding and/or gripping area 22 is ergonomically shaped such that an operator can comfortably hold the drywall screwdriver 12. For increasing the holding comfort, the holding and/or gripping area 22 is equipped with a soft grip at least in certain areas.

For electrical supply of the drywall screwdriver 12 with energy, a battery pack receptacle 28 is provided at the end of the holding and/or gripping area 22, to which a battery pack 30 can be mechanically coupled via a corresponding battery pack interface not illustrated here. The battery pack 30 is in particular a lithium ion battery pack, which is configured as a changeable or exchangeable battery pack 30. In particular, the battery pack 30 is formed as a change battery pack or system battery pack, which means that the battery pack 30 can be universally used for electrical energy supply of various electric appliances, for example an electric tool, electric gardening tool, household appliance, vehicles or the like besides the electrical energy supply of the drywall screwdriver 12. The battery pack 30 has a nominal voltage between ca. 12 Volts and ca. 40 Volts. A preferred nominal voltage of the battery pack 30 is 18 Volts.

In the region of the holding and/or gripping area 22, an actuation unit 24 in the form of an on and off switch 26 is provided between the two shell-like housing halves 18, 18'. By actuating the on and off switch 26, the drywall screwdriver 12 can be supplied with electrical energy, which is provided by the battery pack 30, and thus also be used.

The drywall screwdriver 12 further includes a screw-in depth limiting element (not illustrated), via which a screw-in depth can be adjusted. The screw-in depth limiting element can be brought into various positions by the operator of the drywall screwdriver ?5 12 to limit a screw-in depth for example to a value corresponding to the respective position. For adjusting the screw-in depth, the screw-in depth limiting element can for example be equipped with an internal thread and be rotatable around it. Alternatively, the screw-in depth limiting element can also provide a lock with multiple locking positions to adjust the screw-in depth.

19315015_1 (GHMatters) P120670.AU

The figure 2 shows an area of the electric hand tool 10 illustrated in figure 1 in a schematically sectioned side view, while the figures 3A and 3B show individual components of the sectional representation illustrated in figure 2 in detailed manner.

As already mentioned in figure 1, the drywall screwdriver 12 comprises a housing 14 with a drive housing 16 and a transmission housing 20. Within the housing 14, in particular within the drive housing 16, a drive unit 32 is provided. The drive unit 32 is constituted by an electric motor, optionally by a brush motor or by a brushless motor. The drive unit 32 is formed to drive a motor shaft 34 rotating around a rotational axis.

At the end of the motor shaft 34 opposing the drive unit 32, a fan wheel 36 is provided, which can be driven rotating around a rotational axis by the motor shaft 34. The fan wheel 36 in particular serves for cooling the components and assemblies, respectively, in the drive housing 16 and in the transmission housing 20 by an airflow. A further drive shaft 38 is provided as an extension of the motor shaft 34. The drive shaft 38 is coupled at the end of the motor shaft 34 by means of suitable force- and/or form-fit connections.

Moreover, the drywall screwdriver 12 comprises a transmission unit 40 mechanically coupled to the drive unit 32 and an insert holder 78 mechanically coupled to the transmission unit 40 for receiving a tool insert (not illustrated). The tool insert can for example be constituted by a bit insert or the like.

For receiving such a tool insert, the insert holder 78 comprises a substantially cylindrical receiving space frontally open on a narrow side, into which the respective tool insert can ?5 be introduced or inserted from outside of the electric hand tool 10.

Moreover, the drywall screwdriver 12 comprises a coupling unit 58, which is intended to couple or to decouple a torque of the transmission unit 40 to or from the insert holder 78.

The transmission unit 40 is constituted by a single-stage planetary transmission 42. The planetary transmission 42 includes a sun gear 44, which is associated with the drive

19315015_1 (GHMatters) P120670.AU shaft 38. Preferably, the sun gear 44 is frontally fitted onto the drive shaft 38 at least in sections. Thus, the sun gear 44 is driven rotating around a rotational axis by the drive shaft 38. The rotational axis extends at least approximately aligned with the rotational axis of the motor shaft 34 and the insert holder 78.

The transmission unit 40 further includes a planetary carrier 46. The planetary carrier 46 comprises three depressions (not illustrated) on the side facing the drive unit 32. The depressions are open to both sides such that a continuous depression is formed. A stud with a cylindrical shape is respectively inserted into the depressions at least in sections, i.e. the depressions have a cross-section, which corresponds to the stud shape. Preferably, the studs are retained in the respective depressions of the planetary carrier 46 in clamping manner.

A planetary gear 48 is respectively associated with each stud, wherein the planetary gears 48 can rotate around a rotational axis. The rotational axis of the planetary gears 48 respectively corresponds to a central axis of the studs.

The planetary gears 48 are respectively arranged on the side of the planetary carrier 46 facing the drive unit 32 via the studs such that the movement of the sun gear 44 is transferred to the planetary gears 48 and thereby to the entire planetary carrier 46.

The planetary transmission 42 itself is supported via a ring gear 50, which is non rotatably or rotationally fixedly arranged in the housing 14 of the drywall screwdriver 12. The non-rotatability or rotational fixedness of the ring gear 50 is achieved by knobs, ?5 which are provided on the outer lateral surface of the ring gear 50. The knobs can engage with mating or corresponding receptacles in the inner lateral surface of the housing 14 and thus generate and/or establish the non-rotatability.

The ring gear 50 comprises an internal toothing on the inner lateral surface, along which the planetary gears 48 can roll and set the planetary carrier 46 into rotation when they are driven by the sun gear 44.

19315015_1 (GHMatters) P120670.AU

On the side facing away from the drive unit 32 or on the side facing the coupling unit 58, the planetary carrier 46 comprises an axially extending projection 52 with catch elements 54 provided thereon. The projection 52 has an at least approximately cylindrical shape. The projection 52 is formed hollow such that the free end thereof forms a receptacle 56. The insert holder 78 can be retained, preferably in clamping manner, in the receptacle 56.

The projection 52 of the planetary carrier 46 comprises three catch elements 54 on its outer circumference. The catch elements 54 extend radially outwards to the outer edge of the planetary carrier 46. The catch elements 54 are preferably formed cuboidal (cf. figure 3A and 3B).

The coupling unit 58 includes a coupling element 60, which comprises a recess 62. The recess 62 is shaped such that the projection 52 of the planetary carrier 46 engages with the catch elements 54 provided thereon. By this cooperation between planetary carrier 46 and coupling element 60, accordingly, the torque is transferred from the drive unit 32 to the coupling element 60 with the coupling unit 58 coupled-in such that the coupling element 60 is driven rotating via a rotational axis longitudinally extending centrally through the insert holder 78. The rotational axis of the insert holder 78 preferably extends aligned or collinear with the rotational axis of the motor shaft 34.

The recess 62 of the coupling element 60 is formed such that the coupling element 60 is completely shifted or fitted onto and/or retained on the projection 52 of the planetary carrier 46. This is in particular effected such that the projection 52 of the planetary ?5 carrier 46 protrudes beyond the coupling element 60 with the coupling element 60 completely fitted.

The coupling unit 58, in particular the coupling element 60, is mounted by a bearing unit 80 at least in sections. The bearing unit 80 is constituted by a ball bearing or the like to rotationally mount the coupling element 60.

19315015_1 (GHMatters) P120670.AU

On the side facing the planetary carrier 46, the coupling element 60 comprises a largely flat surface such that the coupling element 60 can also completely rest on the planetary carrier 46. On the side facing away from the planetary carrier 60, the coupling element 60 comprises three catches 64, which are formed as knobs or elevations or the like.

The coupling unit 58 includes additional coupling elements, in particular a further coupling element 66 and a coupling element 68 fixed to the insert holder 78. On the side facing the coupling element 60, the further coupling element 66 comprises first catches 70, which are formed at least approximately corresponding to the catches 64 of the coupling element 60.

On the side facing away from the coupling element 60 or on the side facing the fixed coupling element 68, the further coupling element 66 comprises second catches 72. The second catches 72 can at least temporarily engage with corresponding further catches 74, which are provided on the side of the fixed coupling element 68 facing the further coupling element 66, in particular in the decoupled state of the coupling unit 58.

Between the coupling element 60 and the further coupling element 66, a spring element 76 is provided or clamped, via which the coupling element 60 and the further coupling element 66 are kept axially spaced. As soon as an operator applies pressure on the drywall screwdriver 12 during and/or in countersinking a screw, the further coupling element 66 moves axially towards the coupling element 60 against a spring force of the spring element 76 and couples in at the coupling element 60 with its first catches 70. As a result, a torque is transferred from the drive unit to the insert holder 78.

As soon as the screw-in depth preset by the screw-in depth limiting element is reached, the further coupling element 66 again decouples from the coupling element 60 and is moved axially towards the fixed coupling element 68 by the spring element 76 such that it engages with the corresponding further catches 74 of the fixed coupling element 68 and a torque transfer to the insert holder 78 is consequently prevented.

19315015_1 (GHMatters) P120670.AU

The invention was described with reference to a preferred embodiment. However, it is conceivable for an expert that modifications or variations of the invention can be made without therein departing from the scope of the claims below.

It is to be understood that, if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country.

In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word "comprise" or variations such as "comprises" or "comprising" is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.

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List of reference characters

10 Hand tool 12 drywall screwdriver 14 housing 16 drive housing 18 housing half 18' housing half 20 transmission housing 22 holding and/or gripping area 24 actuation unit 26 on and off switch 28 battery pack receptacle 30 battery pack 32 drive unit 34 motor shaft 36 fan wheel 38 drive shaft 40 transmission unit 42 planetary transmission 44 sun gear 46 planetary carrier 48 planetary gear 50 ring gear ?5 52 projection 54 catch element 56 receptacle 58 coupling unit 60 coupling element 62 recess 64 catch 66 further coupling element

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68 coupling element fixed to the insert holder 70 first catches of the further coupling element 72 second catches of the further coupling element 74 further catches 76 spring element 78 insert holder 80 bearing unit

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Claims

1. An electric hand tool (10), in particular drywall screwdriver (12), comprising

- a housing (14) with a drive unit (32) arranged therein, which drives a motor shaft (34) rotating around a rotational axis, - a transmission unit (40) mechanically coupled to the drive unit (32) and an insert holder (78) mechanically coupled to the transmission unit (40) for receiving a tool insert, - a coupling unit (58), which is intended to couple and/or decouple a torque of the transmission unit (40) to or from the insert holder (78), - wherein it is provided that - the transmission unit (40) is constituted by a planetary transmission (42), wherein the planetary transmission (42) includes a planetary carrier (46), which comprises a projection, on the side facing the coupling unit (58), with catch elements (54) provided thereon, - the coupling unit (58) includes a coupling element (60) with at least one recess (62), with which the projection (52) of the planetary carrier (46) engages with the catch elements (54) provided thereon.

2. The electric hand tool according to claim 1, wherein the at least one recess (62) of the coupling element (60) corresponds to an outer contour of the projection (52), arranged on the planetary carrier (46), with the catch elements (54) provided thereon.

3. The electric hand tool according to any one of the preceding claims, wherein the projection (52) axially extends from the planetary carrier (46) from the side facing the coupling element (60), and wherein the projection (52) is formed by a cylindrical shape, a conical shape, a pyramidal shape or the like.

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4. The electric hand tool according to any one of the preceding claims, wherein the projection (52) of the planetary carrier (46) comprises at least two catch elements (54), preferably three catch elements (54).

5. The electric hand tool according to any one of the preceding claims, wherein the projection (52) comprises an outer lateral surface, from which the catch elements (54) extend radially outwards.

6. The electric hand tool according to any one of the preceding claims, wherein the catch elements (54) have a spherical shape, cylindrical shape, cuboid shape or the like.

7. The electric hand tool according to any one of the preceding claims, wherein the planetary transmission (42) is formed single-stage.

8. The electric hand tool according to any one of the preceding claims, wherein the planetary transmission (42) is supported by a ring gear (50), wherein the ring gear (50) is substantially non-rotatably or rotationally fixedly arranged in the outer housing of the electric hand tool (10).

9. The electric hand tool according to any one of the preceding claims, wherein the coupling element (60) is flatly formed on the side facing the planetary carrier (46) and comprises catches (64) on the side facing away from the planetary carrier (46).

10. The electric hand tool according to anyone of the preceding claims, wherein the coupling unit (58) includes additional coupling elements, in particular a further coupling element (66) and a fixed coupling element (68).

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