Hand-held power tool

Abstract

The invention relates to a hand-held power tool (100) having: a housing (110); a drive motor (114) comprising a drive shaft (116); a transmission (118) which can be driven by means of the drive shaft (116), the transmission (118) having a transmission housing (119), a transmission cover (126) and a ring gear (129), and the transmission cover (136) closing at least portions of the transmission housing (119); and a tool holder (150) for receiving an insert tool (140), wherein the tool holder (150) can be driven by means of the transmission (118). It is proposed for the transmission cover (136) to at least partially engage in the ring gear (129).

Description

[0001] R. 416646

[0002] - 1 -

[0003] Description

[0004] title

[0005] hand-held power tool

[0006] The present invention relates to a hand-held power tool according to the preamble of claim 1.

[0007] State of the art

[0008] From DE 10 2017 211 774 A1 a hand-held power tool with a drive housing, with a percussion housing and with a rotary percussion mechanism is already known.

[0009] Disclosure of the invention

[0010] The present invention relates to a hand-held power tool comprising a housing, a drive motor with a drive shaft, a gearbox driven by the drive shaft, the gearbox comprising a gearbox housing, a gearbox cover, and a ring gear, wherein the gearbox cover at least partially closes the gearbox housing, and a tool holder for receiving an insert tool, wherein the tool holder is driven by the gearbox. It is proposed that the gearbox cover engages at least partially with the ring gear.

[0011] The invention provides a compact hand-held power tool by having the gearbox cover engage at least partially with the ring gear.

[0012] The hand-held power tool can be designed as an electrically powered hand-held power tool. The electrically powered hand-held power tool can be R. 416646

[0013] - 2 - be designed as a mains-powered or battery-powered hand tool. For example, the hand tool can be designed as a screwdriver, a drill / driver, an impact drill / driver, an impact wrench, or a rotary impact wrench.

[0014] The housing of the hand-held power tool is designed to at least partially accommodate the drive motor, the gearbox, a striking mechanism, and the tool holder. The housing can be designed as a shell housing with two half-shells.

[0015] The hand-held power tool has a drive unit. The drive unit comprises the drive motor and the gearbox. The drive motor can be an electrically commutated drive motor. In particular, the drive motor can be designed as at least one electric motor. The drive motor is designed such that it can be operated via a hand switch. When the hand switch is operated by a user, the drive motor is switched on and the hand-held power tool is put into operation. If the hand switch is no longer operated by the user, the drive motor is switched off. Preferably, the drive motor is electronically controllable and / or regulated in such a way that reversing operation and setting a desired rotational speed are possible. In reversing operation, the drive motor can be switched between clockwise and counterclockwise rotation.For switching the drive motor in reversing mode, the hand-held power tool may have a direction-of-rotation switching element, in particular a direction-of-rotation switch.

[0016] The drive motor includes a drive shaft. The drive shaft is supported in the housing by means of at least one drive shaft bearing. The drive motor can drive the gearbox, the impact mechanism, and / or the tool holder via the drive shaft. The drive shaft bearing can be, for example, a ball bearing, a needle bearing, a roller bearing, or a plain bearing. The drive shaft bearing can be located at an end of the drive motor facing the tool holder. The drive shaft bearing can be located, particularly axially, between the gearbox and the drive motor. The drive shaft can project into the intermediate shaft. The drive shaft bearing can be located in the intermediate shaft, such that the R. 416646

[0017] - 3 -

[0018] The drive shaft is supported in the intermediate shaft by means of the drive shaft bearing. An additional drive shaft bearing may also be provided for supporting the drive shaft. This additional drive shaft bearing may be located at the end of the drive motor furthest from the tool holder. This additional drive shaft bearing may be, for example, a ball bearing, a rolling bearing, or a plain bearing. The drive shaft may have a sealing element. This sealing element may be designed to at least partially seal the gearbox and / or the impact mechanism from the drive motor. The sealing element may be arranged circumferentially around the drive shaft. The sealing element may be connected to the gearbox cover or to the drive shaft. The sealing element may engage with a toothed section of the drive shaft. The sealing element may have corresponding toothing.The sealing element can then be arranged axially between the drive motor, in particular a spacer element of a rotor of the drive motor, and the gearbox, in particular the planet gear or planet gears.

[0019] The drive shaft is designed to drive the transmission. The transmission can be designed as at least one planetary gear set, and it can, for example, be switchable. In a switchable transmission, switching between at least two gear ratios is possible by means of at least one gear-shifting element, in particular a gear selector. The transmission can have a transmission housing and a transmission cover. The transmission can have a ring gear. The ring gear can bear against the transmission housing, in particular axially. The transmission cover is designed to close the transmission housing, at least partially. In addition, the transmission cover is designed to engage at least partially with the ring gear. Specifically, the transmission cover is designed to engage at least partially with an inner circumference of the ring gear.

[0020] The hand-held power tool may include a percussion mechanism. During operation, the percussion mechanism generates high torque peaks to loosen or tighten fasteners, or to drill holes. The percussion mechanism may be connected to the drive motor via a gearbox. The percussion mechanism may be designed, for example, as a rotary percussion mechanism, a ratchet percussion mechanism, a rotary percussion mechanism, a V-groove percussion mechanism, or a hammer percussion mechanism. R. 416646

[0021] - 4 - The gearbox and / or the striking mechanism may include the intermediate shaft. For example, the intermediate shaft may accommodate planetary gears of the gearbox. It is possible that the intermediate shaft includes a planet carrier for accommodating the planetary gears of the planetary gearbox. Furthermore, the intermediate shaft may at least partially drive the striking mechanism. The striking mechanism may include a striking mechanism housing and / or a striking mechanism cover. It is possible that both the gearbox housing and the striking mechanism housing, as well as the gearbox cover and the striking mechanism cover, are one piece. Furthermore, the striking mechanism may include a striker, at least one striking mechanism spring, at least one striking mechanism ball, and at least one striking cam. The striker and the striking mechanism spring may be arranged substantially within the striking mechanism housing.The striking mechanism spring can be designed, for example, as a coil spring, a barrel spring, a conical spring, a chimney spring, or a profile spring. The striking mechanism cover can be arranged, particularly axially, between the striking mechanism, especially the striker and the striking mechanism spring, and the drive motor. The striking mechanism ball is designed to connect the striker to the intermediate shaft. For example, two striking mechanism balls can be provided. Furthermore, the striking mechanism has an anvil with an anvil body and at least one anvil cam. For example, two anvil cams can be provided. The striking mechanism is designed such that the striker drives the anvil cam by means of the striking cam. When the striker rotates during non-striking operation of the striking mechanism, this rotation is transmitted to the anvil cam via the striking cam.In the striking operation of the striking mechanism, the striking cam strikes the anvil cam circumferentially, thus driving it further. For example, two striking cams can be provided. The tool holder can be connected to the anvil. It is possible that the tool holder forms the anvil. Furthermore, it is conceivable that the tool holder and the anvil are a single piece.

[0022] The intermediate shaft can be driven by means of the gearbox. The intermediate shaft may have a guide element. The guide element may be designed to guide the striker. The intermediate shaft has the guide element. The guide element is designed to guide the striker of the striking mechanism at least axially. The guide element is designed such that it guides the striker both in the non-striking operation of the striking mechanism and in the striking operation of the R. 416646

[0023] - 5 -

[0024] The striking mechanism is guided. When the striker is wound up during operation of the striking mechanism, the guide element guides the striker axially towards the gearbox or drive motor. The guide element can be cylindrical or hollow cylindrical, for example. The guide element has a guide surface. The guide surface is designed such that the striker can be guided at least axially on the guide surface. The guide surface can be located on the outer circumference of the intermediate shaft.

[0025] A centering device may be provided, designed to center the intermediate shaft. This centering device ensures that the intermediate shaft is centered in both non-impact and impact operation. The intermediate shaft may be centered relative to a tool axis. The centering device may be located on the intermediate shaft and / or on the tool holder. The diameter of the guide element and the diameter of the centering device are essentially the same. It is also conceivable that the two diameters are equal. Even minor deviations of up to 2 mm between the two diameters are considered equal.

[0026] A bearing device can be provided for supporting the intermediate shaft. The gearbox can be designed to incorporate this bearing device, thus eliminating the need for a separate intermediate shaft bearing.

[0027] The hand-held power tool has a tool holder. The tool holder can be designed as an internal tool holder, such as a bit holder, and / or as an external tool holder, such as a socket holder. It is also conceivable that the tool holder is designed as a drill chuck. The tool holder can accommodate insert tools, such as screwdriver bits or socket wrenches, so that a user can create screw connections between a fastener and a mounting bracket. The hand-held power tool can have a tool axis. A rotational axis of the tool holder can form the tool axis. In particular, "axial" should be understood to mean essentially parallel to the tool axis, whereas "radial" should be understood to mean essentially perpendicular to the tool axis. The tool holder can be mounted using a tool holder bearing element R. 416646.

[0028] - 6 - be rotatably mounted in the impact mechanism housing and / or the gearbox housing. The tool holder bearing element can be designed, for example, as a plain bearing or at least a ball bearing. It is possible that the tool holder has, for example, two or three tool holder bearing elements.

[0029] The power tool also includes a power supply, which is designed for battery operation using rechargeable batteries, in particular power tool battery packs, and / or for mains operation. In a preferred embodiment, the power supply is designed for battery operation. Within the scope of the present invention, a "power tool battery pack" is understood to be an assembly of at least one battery cell and a battery pack housing. The power tool battery pack is advantageously designed to supply power to commercially available battery-operated power tools. The at least one battery cell can, for example, be a lithium-ion battery cell with a nominal voltage of 3.6 V. By way of example, the power tool battery pack can comprise up to ten battery cells, although a different number of battery cells is also conceivable.Both the battery-powered version and the mains-powered version are sufficiently known to those skilled in the art, which is why the details of the power supply will not be discussed here.

[0030] The hand-held power tool may have a control unit, at least for controlling the drive unit. The control unit may be located in the housing, for example in a handle of the hand-held power tool or in the area of ​​a power supply interface.

[0031] In one embodiment of the hand-held power tool, the gearbox cover is arranged at least partially inside the ring gear. The ring gear has an inner circumference and an interior space. The gearbox cover is arranged at least partially within this inner circumference and interior space. The gearbox cover is designed to close the ring gear in the direction of the drive motor. R. 416646

[0032] - 7 -

[0033] In one embodiment of the hand-held power tool, the gearbox cover has a gearbox receptacle designed to at least partially accommodate the planet carrier of the gearbox. The gearbox cover can form the gearbox receptacle. The gearbox receptacle can, for example, be designed as a kind of cup, pot, or pan. The gearbox cover and the gearbox receptacle can be formed as a single piece. The gearbox receptacle can accommodate the planet carrier of the gearbox at least partially and at least sectionally. The planet carrier and the gearbox receptacle can be spaced apart from each other and / or abut each other. The intermediate shaft can form the planet carrier. The gearbox receptacle can also be designed as an intermediate shaft receptacle. The intermediate shaft and the intermediate shaft receptacle can be spaced apart from each other and / or abut each other.

[0034] In one embodiment of the hand-held power tool, a backlash compensating element is arranged, particularly axially, between the gearbox cover and the ring gear. The backlash compensating element is designed to compensate for axial and / or radial play. It can compensate for axial play by exerting an axial force on the ring gear, the intermediate shaft, from the intermediate shaft to the anvil, and correspondingly to the tool holder. This reduces the axial play between the gearbox housing, the intermediate shaft, and the anvil, minimizing it to essentially 0 mm. The backlash compensating element is designed to preload the intermediate shaft relative to the anvil. Furthermore, the backlash compensating element is designed to seal the gearbox against lubricant leakage. The backlash compensating element can be designed, for example, as a spring element, such as an O-ring.The gearbox cover can be arranged axially between the backlash adjuster and the planet gear of the planetary gear set. The backlash adjuster can rest against the gearbox mounting. The backlash adjuster can be arranged radially between the gearbox mounting and the ring gear. In this position, the backlash adjuster can radially center the gearbox cover. Additionally, the backlash adjuster dampens minor movements of the gearbox cover. R. 416646.

[0035] - 8 -

[0036] In one embodiment of the hand-held power tool, the gearbox cover is designed to engage a shoulder on the internal gear. The internal gear has a shoulder that is at least partially circumferential. The internal gear can form the shoulder itself, and these shoulders can also be integral parts of the gear. It is possible for the shoulder of the internal gear to be circumferential. The shoulder of the internal gear is a shoulder extending towards the drive shaft. The shoulder of the internal gear can be radially oriented towards the drive shaft. The gearbox cover can be designed to engage the shoulder of the internal gear via the backlash compensation element. The gearbox cover can abut the backlash compensation element. The backlash compensation element can abut the shoulder of the internal gear. It is also conceivable that the gearbox cover abuts the internal gear. The internal gear can be designed to axially secure the gearbox cover, at least partially, via the shoulder.

[0037] In one embodiment of the hand-held power tool, the outer diameter of the gearbox cover is smaller than the root diameter of the internal gear. The root diameter is one of the largest inner diameters of the internal gear. The outer diameter of the gearbox cover is smaller than the root diameter in such a way that the gearbox cover can be accommodated inside the internal gear.

[0038] In one embodiment of the hand-held power tool, the gearbox cover is designed as a thrust washer. The thrust washer can be, for example, a thin sheet of metal, disc-shaped, ring-shaped, bowl-shaped, or plate-shaped.

[0039] In one embodiment, the wall thickness of the gearbox cover, particularly the thrust washer, is less than 1.5 mm. The wall thickness of the gearbox cover can be the same as the wall thickness of the thrust washer. It is also possible for the wall thickness of the gearbox cover to be less than 1 mm.

[0040] In one embodiment of the hand-held power tool, the gearbox cover, in particular the thrust washer, has a toothed ring designed to engage with the internal gear. The toothed ring can be formed on an outer circumference of the gearbox cover. It is possible that the toothed ring and the gearbox cover are formed as a single piece. The toothed ring can be designed to extend radially outwards. See R. 416646

[0041] - 9 - The ring gear can be designed radially towards the housing and / or radially away from the drive shaft. The ring gear of the gearbox cover can be inserted into a ring gear of the internal gear. Thus, the ring gear of the gearbox cover and the ring gear of the internal gear can form a toothed connection.

[0042] In one embodiment of the hand-held power tool, an intermediate shaft bearing element is arranged between the intermediate shaft and the gearbox cover. The intermediate shaft bearing element can be arranged radially between the intermediate shaft and the gearbox cover. The intermediate shaft bearing element can be, for example, a ball bearing, a plain bearing, or the like. The intermediate shaft can have a bearing receptacle, which can be designed, for example, as a circumferential collar. The planet gears can be arranged, particularly axially, between the intermediate shaft bearing element and the drive shaft bearing. The gearbox cover can have an intermediate shaft bearing receptacle. The intermediate shaft bearing element can be arranged radially between the bearing receptacle and the intermediate shaft bearing receptacle.

[0043] In one embodiment of the hand-held power tool, the internal gear has a pitch circle diameter by means of which the gearbox cover can be at least partially guided. The pitch circle diameter is a smallest diameter of the internal gear's rim. The gearbox cover can abut the pitch circle diameter with an outer diameter. This allows the gearbox cover to be guided, at least radially. A damping element can be arranged between the gearbox cover and the internal gear.

[0044] In one embodiment, the bearing device includes an axial bearing arrangement that is formed at least partially, and in particular axially, between the intermediate shaft and the gearbox cover. "Axially" can be understood in relation to the tool axis and / or the drive shaft. The axial bearing arrangement enables axial support of the intermediate shaft. The axial bearing arrangement is designed such that the intermediate shaft can be positioned relative to the gearbox cover. R. 416646

[0045] - 10 -

[0046] In one embodiment, the axial bearing device has at least one bearing element that extends circumferentially to the drive shaft. The bearing element can be formed on the intermediate shaft, the planet carrier, and / or the gearbox cover. It is possible that the bearing element is connected to the intermediate shaft, the planet carrier, and / or the gearbox cover, and a single-piece connection is also conceivable. The bearing element can extend circumferentially to the drive shaft or the tool axis. The bearing element can be designed as a ring, web, or projection that at least partially circumferentially.

[0047] In one embodiment, the bearing element is arranged radially between the drive shaft and the ring gear. "Radial" here refers to the area radial to the tool axis or the drive shaft. The bearing element can also be arranged and configured radially on the intermediate shaft between the drive shaft and the ring gear. It is also possible for the bearing element and the intermediate shaft to be formed as a single piece. Another possibility is that the bearing element is arranged radially between the drive shaft and the planet gear pins. The planet gear pins are designed to rotatably mount the planet gears on the planet carrier.

[0048] In one embodiment, the axial bearing device has at least one bearing receptacle designed to receive the bearing element. The bearing receptacle can be located on the gearbox cover, the intermediate shaft, and / or the planet carrier. It is also possible for the bearing receptacle to be integral with the gearbox cover, the intermediate shaft, and / or the planet carrier. The bearing receptacle can receive the bearing element in such a way that the intermediate shaft is supported relative to the gearbox cover. The bearing element and the bearing receptacle can enable low-friction support of the intermediate shaft. The bearing receptacle can be designed circumferentially to the drive shaft. The bearing receptacle can be designed as a bearing surface. This bearing surface can be in the form of a substantially flat surface, for example, ring-shaped or disc-shaped.The bearing receptacle can be formed, for example, by the gearbox cover. In this case, the bearing receptacle and the gearbox cover can be a single piece. It is also possible for the bearing element to be formed by a separate component. This separate component can, for example, be ring-shaped (R. 416646).

[0049] - 11 - Furthermore, the separate component can be arranged axially between the gearbox cover and the intermediate shaft, in particular the planet carrier. Accordingly, the gearbox cover can then have a receptacle for the separate component.

[0050] In one embodiment, the axial bearing device has at least one further bearing element, wherein the bearing element is arranged radially between the drive shaft and the further bearing element. The further bearing element can also be arranged circumferentially to the drive shaft. The further bearing element can be designed analogously to the bearing element. The bearing receptacle can then be designed such that both the bearing element and the further bearing element can be received.

[0051] In one embodiment, the bearing device has at least one lubricant receptacle designed to receive lubricant of the bearing device. The lubricant receptacle can receive the lubricant, such as a lubricant like gear grease. The lubricant receptacle can be arranged radially between the bearing element and the other bearing element. The lubricant receptacle can, for example, be designed as a groove that is at least partially circumferential. The lubricant receptacle can be arranged and / or formed on the intermediate shaft, the planet carrier, and / or the gearbox cover. It is also possible that the lubricant receptacle is integral with the intermediate shaft, the planet carrier, and / or the gearbox cover.

[0052] In one embodiment, the bearing arrangement includes a radial bearing arrangement that is formed at least partially, and in particular radially, between the intermediate shaft and the ring gear. The radial bearing arrangement enables radial support of the intermediate shaft within the gearbox housing. The bearing arrangement comprises the axial bearing arrangement and the radial bearing arrangement.

[0053] In one embodiment, at least one planet gear of the transmission and the ring gear are configured to form the radial bearing device. The transmission can be configured as the planetary gear, wherein the planetary gear has at least one planet gear. It is possible that a plurality of planet gears are used for the Pia- R. 416646

[0054] - 12 - are provided for in the transmission, such as two, three, or more than three planet gears. Three planet gears are provided here as an example. The planet gears and the ring gear are designed to form the radial bearing arrangement, thus absorbing radial forces during operation of the intermediate shaft and transferring them into the transmission housing. The radial bearing arrangement is essentially indirect, via the three planet gears.

[0055] In one embodiment, at least one width of a planet carrier collar of the transmission is smaller than or substantially equal to at least one width of a planet gear of the transmission. The planet carrier collar is a collar of the planet carrier of the transmission. It is possible that the planet carrier collar is also an intermediate shaft collar. In addition to its width, the planet gear also has a planet gear diameter.

[0056] In one embodiment, the opening of the gearbox cover is smaller than or substantially equal to the opening of the intermediate shaft. The gearbox cover has a central opening through which the drive shaft enters the gearbox. The intermediate shaft also has a central opening through which the drive shaft enters the gearbox. The diameter of the gearbox cover opening is smaller than or substantially equal to the diameter of the intermediate shaft opening. The gearbox cover opening and the intermediate shaft opening are axially adjacent. The intermediate shaft opening may have a ramp where the diameter of the intermediate shaft opening increases from the motor side to the tool side.

[0057] In one embodiment, the centering device and the anvil are arranged to overlap at least partially. The centering device and the anvil, in particular the anvil cam, overlap at least partially, especially axially. The intermediate shaft can be arranged to overlap the anvil, in particular the anvil cam, at least partially.

[0058] In one embodiment, the centering device has a centering receptacle designed to at least partially engage the intermediate shaft. The anvil can at least partially form the centering device. The centering receptacle can be R. 416646

[0059] - 13 - be designed as a centering recess. The centering receptacle can be located opposite the tool holder. The centering receptacle can, for example, be cup-shaped, bowl-shaped, or pan-shaped. The diameter of the centering receptacle can be essentially the same as the diameter of the guide element, so that the intermediate shaft can be received via the guide element. At the same time, the intermediate shaft can also be rotatable relative to the tool holder. The centering receptacle can at least partially encompass the intermediate shaft, in particular the guide element, so that these are arranged overlapping each other in sections, in particular axially. The centering receptacle can be arranged radially between the intermediate shaft and the striker, in particular the striking cam.

[0060] In one embodiment, the centering device has a centering collar designed to bear at least partially against the intermediate shaft. The centering collar can be formed on the anvil. The centering collar can, for example, be ring-shaped or a circumferential rib. The centering collar can bear at least partially against the intermediate shaft, particularly the guide element. This allows the intermediate shaft to be centered. The tool holder can be centered via the tool holder bearing element, so that the intermediate shaft can be centered via the centering collar. The centering collar can at least partially enclose the centering holder. The anvil cam can be arranged and / or formed axially between the centering collar and the tool holder.The centering device, with its centering mount and centering collar, can provide a sufficiently long guide length for the intermediate shaft to ensure centering.

[0061] In one embodiment, the centering collar can be arranged to overlap the striker at least partially. The centering collar can be formed on the anvil. The centering collar can, for example, be ring-shaped or a circumferential rib. In non-striking operation, the centering collar can be arranged to overlap the striker, particularly the striking body. In a striker position, the centering collar can project into a closed striker diameter. The centering collar can be arranged radially between the intermediate shaft and the striker, particularly the striking body. R. 416646

[0062] - 14 -

[0063] In one embodiment, the intermediate shaft has at least one contact element designed to at least partially bear against the centering device and to absorb at least axial forces from the centering device. The contact element can be located on an end face of the intermediate shaft. This end face can point towards the tool holder. For example, the contact element can be at least partially ring-shaped. It is also possible for the contact element to be web-shaped. The contact element can bear against the centering device in such a way that the axial forces from the tool holder can be transmitted via the centering device into the intermediate shaft. The axial forces can then be transmitted via the intermediate shaft to the gearbox housing. The contact element can also bear directly against the centering device. The centering holder can accommodate the contact element for this purpose.The component can then rest in the centering receptacle.

[0064] In one embodiment, the contact element is arranged to overlap the anvil at least partially. The contact element is arranged to overlap the anvil, particularly the anvil cam, at least partially axially. The contact element and the anvil cam overlap in such a way as to enable a more compact design.

[0065] In one embodiment, the intermediate shaft has a compensating element designed to compensate for imbalances. The compensating element can be configured as a conical bore in the intermediate shaft. This compensating element increases concentricity and reduces imbalances.

[0066] In one embodiment, the centering device has a centering element designed to engage at least partially with the intermediate shaft. The centering element can be formed by the anvil. It is possible that the centering element and the anvil are integral parts. The centering element can, for example, be designed as a centering cone. The centering element can engage at least partially with the compensating element of the intermediate shaft. The centering element can bear against the compensating element of the intermediate shaft. In this way, the centering cone can bear against the conical bore and additionally center the intermediate shaft. (R. 416646)

[0067] - 15 -

[0068] The mounting element of the intermediate shaft can at least partially encompass the centering element in the circumferential direction.

[0069] In one embodiment, the centering device has a collecting element designed to collect at least lubricants. The collecting element can be formed by the anvil. For example, the collecting element can be configured as a blind hole with a centering bore. The collecting element allows the lubricants within the impact mechanism to be at least partially collected. Furthermore, the collecting element enables higher concentricity. The collecting element can be configured opposite the compensating element.

[0070] R. 416646

[0071] - 16 -

[0072] Brief description of the drawings

[0073] The invention is explained below with reference to preferred embodiments.

[0074] The drawings below show:

[0075] Fig. 1 shows a schematic view of a hand-held power tool according to the invention;

[0076] Fig. 2a shows a section of a longitudinal section of a first embodiment of the hand-held machine tool;

[0077] Fig. 2b shows a section of a cross-section of the first embodiment of the hand-held power tool;

[0078] Fig. 2c shows a section of a longitudinal section of the first embodiment of the hand-held machine tool;

[0079] Fig. 2d a perspective view of a tool holder with an anvil of the first embodiment of the hand-held machine tool;

[0080] Fig. 3a shows a first perspective view of an intermediate shaft of the first embodiment of the hand-held machine tool;

[0081] Fig. 3b shows a second perspective view of the intermediate shaft of the first embodiment of the hand-held machine tool;

[0082] Fig. 4a shows a section of a longitudinal section of a second embodiment of the hand-held power tool;

[0083] Fig. 4b a perspective view of a tool holder with an anvil of the second embodiment of the hand-held power tool; R. 416646

[0084] - 17 -

[0085] Fig. 5a a first perspective view of a gearbox cover of the hand-held power tool;

[0086] Fig. 5b a second perspective view of the gearbox cover of the hand-held power tool;

[0087] Fig. 6 shows a section of a longitudinal section of the hand-held power tool;

[0088] Fig. 7 shows a section of a longitudinal section of a third embodiment of the hand-held power tool;

[0089] Fig. 8a shows a section of a longitudinal section of a fourth embodiment of the hand-held power tool;

[0090] Fig. 8b shows a gearbox cover of the fourth embodiment of the hand-held power tool;

[0091] Description of the exemplary implementations

[0092] Fig. 1 shows a hand-held power tool 100 according to the invention, which is designed as an exemplary cordless impact wrench 100. The hand-held power tool 100 comprises an output shaft 124 and a tool holder 150. The hand-held power tool 100 has a housing 110 with a handle 126. The hand-held power tool 100 can be mechanically and electrically connected to a power supply for battery operation to provide an independent power supply, so that the hand-held power tool 100 is designed as a cordless hand-held power tool 100. A hand-held power tool battery pack 130 serves as the power supply here. However, the present invention is not limited to cordless hand-held power tools, but can also be applied to mains-powered, i.e., mains-operated, hand-held power tools.

[0093] The housing 110 includes a drive unit 111. The drive unit 111 is arranged in the housing 110. The drive unit 111 comprises an electrically commutated drive motor 114 which is powered by the hand tool battery pack R. 416646.

[0094] - 18 -

[0095] The drive motor 114 is supplied with power by a stator 165, motor terminals 166, a rotor 167, and rotor magnets 168 (see also Fig. 2). The gearbox 118 is designed as at least a planetary gearbox. The drive motor 114 is designed such that it can be operated, for example, via a hand switch 128, allowing the drive motor 114 to be switched on and off. Advantageously, the drive motor 114 is electronically controllable and / or adjustable, enabling reversing operation and a desired rotational speed. For reversing operation, the hand-held power tool 100 has a direction-of-rotation switching element 121, which is designed as a direction-of-rotation switch. The direction-of-rotation switching element 121 is designed to switch the drive motor 114 between clockwise and counterclockwise rotation.The design and operation of a suitable drive motor are well known to the expert, which is why they will not be discussed in more detail here.

[0096] The gearbox 118 is connected to the drive motor 114 via a drive shaft 116. The drive shaft 116 is supported in the housing 110 by means of a drive shaft bearing 180 and another drive shaft bearing (not shown), see Fig. 2. The gearbox 118 is designed to convert a rotation of the drive shaft 116 into a rotation between the gearbox 118 and the tool holder 150. The gearbox 118 comprises a gearbox housing 119, a gearbox cover 136, and a ring gear 129, wherein the gearbox cover 136 at least partially closes the gearbox housing 119, see also Fig. 2.

[0097] The hand-held power tool 100, designed as a cordless impact wrench, comprises a rotary impact mechanism 122 with an intermediate shaft 120, see also Fig. 2. Both the rotary impact mechanism 122 and the intermediate shaft 120 are arranged in the housing 110. Preferably, the conversion from the rotation of the drive shaft 116 to a rotation of the tool holder 150 is achieved via the intermediate shaft 120. The intermediate shaft 120 rotates relative to the drive shaft 116 with increased torque but at a reduced rotational speed. Here, the drive shaft 116 projects into the intermediate shaft 120 by way of example, see Fig. 2. Here, the drive shaft bearing 180 is arranged essentially within the intermediate shaft 120, so that the drive shaft 116 is supported by the drive shaft bearing 180 essentially within the intermediate shaft 120.

[0098] - 19 - the intermediate shaft 120 is supported. The rotary striking mechanism 122 comprises a striking mechanism housing 123, whereby the rotary striking mechanism 122 can also be arranged in another suitable housing, such as the gearbox housing 119. The rotary striking mechanism 122 is designed to drive the output shaft 124. The rotary striking mechanism 122 comprises a striking mechanism cover 127, which closes off the rotary striking mechanism 122 towards the drive motor 114. By way of example, the gearbox cover 136 and the striking mechanism cover 127 are shown here as a single piece. Furthermore, by way of example, the gearbox housing 119 and the striking mechanism housing 123 are shown here as a single piece.

[0099] The hand-held power tool 100 comprises a tool axis 102, wherein a rotational axis of the tool holder 150 forms the tool axis 102. The tool holder 150 is provided on the output shaft 124. Preferably, the tool holder 150 is integrally formed and / or formed on the output shaft 124. Preferably, the tool holder 150 is arranged in an axial direction 132 pointing away from the drive unit 111. The tool holder 150 is designed here as an internal hexagon socket, similar to a bit holder, which is intended to receive an insert tool 140. The insert tool is designed like a screwdriver bit with a multi-sided external coupling 142. The type of screwdriver bit, for example, of the HEX type, is well known to those skilled in the art.The present invention is not limited to the use of HEX screwdriver bits, but other tool holders that appear useful to those skilled in the art can also be used, such as HEX drill bits, SDS quick-release tools, sockets, or round-shank drill chucks. Furthermore, the design and function of a suitable bit holder are well known to those skilled in the art. The tool holder 150 is rotatably mounted in the impact mechanism housing 123 and / or the gearbox housing 119 by means of a tool holder bearing element 190. The tool holder bearing element 190 is shown here by way of example as a ball bearing, with two tool holder bearing elements 190 being provided.

[0100] The hand-held power tool 100 has a control unit 170 for controlling at least the drive unit 111, in particular the drive motor 114. The housing 110 at least partially accommodates the control unit 170. The control unit 170 includes a microprocessor (not shown in detail). R. 416646

[0101] - 20 -

[0102] Furthermore, the housing 110 includes a power supply holding device 160. The power supply holding device 160 accommodates the hand-held power tool battery pack 130 and forms a base 162 with a standing surface. The hand-held power tool battery pack 130 can be detached from the power supply holding device 160 without tools. The housing 110 also includes the handle 126 and the power supply holding device 160. The handle 126 can be gripped by the user. In one embodiment, the power supply holding device 160 is arranged on the handle 126. The hand-held power tool 100 can be set down using the base 162.

[0103] Fig. 2a shows a section 300 of a longitudinal section of a first embodiment 301 of the hand-held power tool 100. The gearbox cover 136 is designed to close the gearbox housing 119, at least partially. Furthermore, the gearbox cover 126 is designed to engage, at least partially, with the ring gear 129. The gearbox cover 136 is designed to engage, at least partially, with an inner circumference 266 of the ring gear 129. The ring gear 129 rests against the gearbox housing 119, particularly axially. The drive shaft 116 includes a sealing element 117, which is designed to seal, at least partially, the gearbox 118 and / or the impact mechanism 122, in particular the rotary impact mechanism 122, from the drive motor 114. The sealing element 117 is arranged circumferentially around the drive shaft 116. Here, the sealing element 117 is shown connected to the drive shaft 166 by way of example.The sealing element 117 is arranged axially between the drive motor 114, in particular a spacer element 164 of the rotor 167 of the drive motor 114, and the gearbox 118, in particular a planet gear 262 or planet gears 262. The hand-held power tool 100 comprises a bearing device 400. The gearbox 118 is designed to form the bearing device 400.

[0104] The rotary impact mechanism 122 is connected to the drive motor 114 via the gearbox 118. The gearbox 118 and / or the rotary impact mechanism 122 includes the intermediate shaft 120. The intermediate shaft 120 accommodates the planet gears 262 of the gearbox 118. Furthermore, the intermediate shaft 120 includes a planet carrier 260 for receiving the planet gears 262 of the planetary gearbox. The intermediate shaft 120 drives R. 416646

[0105] - 21 - the rotary striking mechanism 122 at least partially. The rotary striking mechanism 122 comprises a striker 250, at least one striking spring 252, at least one striking ball 254, and at least one striking cam 256. The striker 250 and the striking spring 252 are arranged essentially within the striking mechanism housing 123. The striking spring 252 is, by way of example, designed as a coil spring. The striking mechanism cover 127 is arranged, in particular axially, between the rotary striking mechanism 122, in particular the striker 250 and the striking spring 252, and the drive motor 114. The striking ball 254 is provided for connecting the striker 250 to the intermediate shaft 120. Two striking balls 254 are provided by way of example. The rotary striking mechanism 122 also includes an anvil 270 with an anvil body 272 and at least one anvil cam 274, see also Fig. 2c, wherein two anvil cams 274 are formed.The rotary impact mechanism 122 drives the striker 250 via the impact cam 256 and the anvil cam 274. The tool holder 150 is connected to the anvil 270, with the tool holder 150 forming the anvil 270 as an integral part. The intermediate shaft 120 includes a guide element 280, which is designed to guide the striker 250, particularly axially. When the striker 250 is wound up during operation of the rotary impact mechanism 122, the guide element 280 guides the striker 250 axially towards the gearbox 118 or the drive motor 114. The guide element 280 is shown as cylindrical. The guide element 280 includes a guide surface 282, which is designed to allow the striker 250 to be guided at least axially on the guide surface 282. The guide surface 282 is formed on an outer circumference of the intermediate shaft 120.

[0106] The hand-held power tool includes a centering device 200. The centering device is designed to center the intermediate shaft 120. The centering device 200 is intended to center the intermediate shaft 120 in both non-impact and impact operation. The intermediate shaft 120 is centered relative to the tool axis 102. The centering device 200 is formed on the intermediate shaft 120 and / or on the tool holder 150. A diameter 284 of the guide element 280 and a diameter 202 of the centering device 200 are essentially the same size. R. 416646

[0107] - 22 -

[0108] The gearbox cover 136 includes a gearbox receptacle 240. The gearbox receptacle 240 is designed to at least partially accommodate the planet carrier 260 of the gearbox 118. The gearbox cover 136 forms the gearbox receptacle 240, which is a single piece. The gearbox receptacle 240 is shown as a shell-like shape. The gearbox receptacle 240 accommodates the planet carrier 260 of the gearbox 118, at least partially and at least section by section. The gearbox receptacle 240 is also designed here to serve as an intermediate shaft receptacle 242.

[0109] The hand-held power tool 100 includes a backlash compensating element 330. The backlash compensating element is arranged, particularly axially, between the gearbox cover 126 and the ring gear 129. The backlash compensating element 330 is designed to compensate for axial and / or radial play. The backlash compensating element 330 compensates for axial play by exerting an axial force on the ring gear 129, on the intermediate shaft 120, from the intermediate shaft 120 on the anvil 270, and correspondingly on the tool holder 150. The backlash compensating element 330 is designed to preload the intermediate shaft 120 relative to the anvil 270. The backlash compensating element 330 is designed to seal the gearbox 118 against lubricant leakage. The backlash compensating element 330 is, by way of example, designed as a spring element, such as an O-ring.Here, the gearbox cover 136 is arranged axially between the backlash compensating element 330 and the planet gear 262 of the planetary gear set. The backlash compensating element 330 rests against the gearbox mounting 240. The backlash compensating element 330 is arranged radially between the gearbox mounting 240 and the ring gear 129. The ring gear 129 includes a shoulder 340. The gearbox cover 136 is designed to act upon the shoulder 340 of the ring gear 129. The shoulder 340 is formed as an at least partially circumferential shoulder 340. The ring gear 129 forms the shoulder 340, so that they are a single piece. The shoulder 340 of the ring gear 129 is a shoulder 340 extending towards the drive shaft 116. The gearbox cover 136 acts on the shoulder 340 of the ring gear 129 via the backlash compensating element 330. The backlash compensating element 330 rests against the shoulder 340 of the ring gear 129. The gearbox cover 136 rests at least partially against the ring gear 129.The ring gear 129 secures the gearbox cover 136 axially, at least partially, via the shoulder 340. The axial forces are transmitted into the ring gear 129 via the gearbox cover 136, the backlash compensation element 330, and the shoulder 340. The gearbox cover 136 is part number R. 416646.

[0110] - 23 -

[0111] The thrust washer is formed. As an example, the thrust washer is formed as a thin sheet metal part. The wall thickness 242 of the gearbox cover 136, in particular of the thrust washer, is less than 1.5 mm.

[0112] The bearing assembly 400 comprises an axial bearing assembly 420. The axial bearing assembly 420 is formed at least partially, and in particular axially, between the intermediate shaft 120 and the gearbox cover 136. The axial bearing assembly 420 is formed such that the intermediate shaft 120 can be positioned relative to the gearbox cover 136. The axial bearing assembly 400 comprises at least one bearing element 430, see also Figs. 3b, 6, 7. The bearing element is formed circumferentially to the drive shaft 116. By way of example, the bearing element 430 is formed on the intermediate shaft 120, in particular on the planet carrier 260. In this case, the intermediate shaft 120, in particular on the planet carrier 260, is connected to the bearing element, and they are integrally formed. By way of example, the bearing element 430 is formed as a circumferential web. The bearing element 430 is arranged radially between the drive shaft 116 and the ring gear 129.Here, the bearing element 430 is arranged radially between the drive shaft 116 and the planet gear pins 264 of the planet gears 262 of the transmission 118. The planet gear pins 264 are designed to rotatably mount the planet gears 262 on the planet carrier 260. The axial bearing device 420 comprises at least one bearing receptacle 422. The bearing receptacle 422 is designed to receive the bearing element 430. By way of example, the bearing receptacle 422 is arranged and shaped on the transmission cover 136 such that the bearing receptacle 422 and the transmission cover 136 are integral parts. The bearing receptacle 422 receives the bearing element 422 in such a way that the intermediate shaft 120 is supported relative to the transmission cover 136. The bearing receptacle 422 is shaped circumferentially to the drive shaft 116. For example, the storage receptacle 422 is shaped as a storage surface that is disc-shaped.The bearing receptacle 422 is formed by the gearbox cover 136 as an example. The axial bearing device 420 comprises at least one further bearing element 432. The bearing element 430 is arranged radially between the drive shaft 116 and the further bearing element 432. The further bearing element 432 is arranged circumferentially with respect to the drive shaft 116. The further bearing element 432 is formed as a circumferential web. The bearing receptacle 422 is formed as shown in R. 416646.

[0113] - 24 - that both the bearing element 430 and the further bearing element 432 can be received. The bearing device 400 comprises at least one lubricant receptacle 434. The lubricant receptacle 434 is shaped to receive lubricant of the bearing device 400. The lubricant receptacle 434 receives the lubricant, such as a lubricant like gear grease. The lubricant receptacle 434 is arranged radially between the bearing element 430 and the further bearing element 432. By way of example, the lubricant receptacle 434 is shaped as a circumferential groove. The lubricant receptacle 434 is arranged and shaped on the intermediate shaft 120, in particular the planet carrier 260. Thus, the lubricant receptacle 434 is integral with the intermediate shaft 120, in particular the planet carrier 260. The bearing device 400 comprises a radial bearing device 440.The radial bearing assembly 440 is formed at least partially, and in particular radially, between the intermediate shaft 120 and the ring gear 129. The bearing assembly 400 comprises the axial bearing assembly 420 and the radial bearing assembly 440. At least one of the planet gears 262 of the transmission 118 and the ring gear 129 are formed to form the radial bearing assembly 440. A plurality of planet gears 262 are provided here, for example, three planet gears 262. The radial bearing is essentially indirectly provided via the three planet gears 262.

[0114] The gearbox cover 136 includes a central opening 243. The intermediate shaft 120 includes a central opening 286. The opening 243 of the gearbox cover 136 is smaller than or substantially equal to the opening 286 of the intermediate shaft 120. The drive shaft 116 is guided into the gearbox 118 through the opening 243 of the gearbox cover 136 and through the opening 286 of the intermediate shaft 120. The diameter 247 of the opening 243 of the gearbox cover 136 is smaller than or substantially equal to the diameter 287 of the opening 286 of the intermediate shaft 120 (see also Figures 3b and 5). The opening 243 of the gearbox cover 136 and the opening 286 of the intermediate shaft 120 are arranged axially adjacent to each other. In addition, the opening 286 of the intermediate shaft 120 includes a ramp in which the diameter 287 of the opening 286 of the intermediate shaft 120 increases from the motor side to the tool side.

[0115] The centering device 200 and the anvil 270 are arranged at least partially overlapping each other. The centering device 200 and the R. 416646 overlap.

[0116] - 25 -

[0117] The anvil 270, in particular the anvil cam 274, is at least partially, and especially axially, aligned with the anvil 270, see also Fig. 2c. Furthermore, the intermediate shaft 120 is arranged to overlap the anvil 270, in particular the anvil cam 274, at least partially, see also Fig. 2c. The centering device 200 comprises a centering receptacle 210. The centering receptacle is shaped to at least partially engage the intermediate shaft 120. Here, by way of example, the anvil 270 at least partially forms the centering device 200. The centering receptacle 210 is shaped as a centering recess, with the centering receptacle 210 being formed opposite the tool holder 150. By way of example, the centering receptacle 210 is shaped like a cup. The diameter of the centering receptacle 210 corresponds here to the diameter 202 of the centering device 200. The diameter of the centering receptacle 210 is essentially the same as the diameter 284 of the guide element 280.The intermediate shaft 120 is rotatable relative to the tool holder 150. The centering receptacle 210 encompasses the intermediate shaft 120, in particular the guide element 280, at least partially. The centering receptacle 210 is arranged radially between the intermediate shaft 120 and the striker 250, in particular the striking cam 256, see also Fig. 2c. The centering device 200 comprises a centering collar 212. The centering collar is shaped to bear at least partially against the intermediate shaft 120. Here, the centering collar 212 is formed on the anvil 270, being shaped as a circumferential rib. The centering collar 212 bears at least partially against the intermediate shaft 120, in particular the guide element 280. The centering device 200 centers the intermediate shaft 120 via the centering collar 212. The tool holder 150 is centered via the tool holder bearing element 190. The centering collar 212 can be arranged to overlap the striker 250, at least partially.The centering collar 212 is formed on the anvil 270. In non-percussive operation, the centering collar 212 and the striker 250, in particular the striking body 258, overlap. In a striking position, the centering collar 212 projects into a closed striker diameter. Here, the centering collar 212 is arranged radially between the intermediate shaft 120 and the striker 250, in particular the striking body 258. The intermediate shaft 120 comprises at least one contact element 288. The contact element 288 is formed to bear at least partially against the centering device 200 and to absorb at least axial forces of the centering device 200. The contact element 288 is formed on an end face 289 of the intermediate shaft 120, see also Fig. 3a. The end face 289 is oriented in the direction of R. 416646.

[0118] - 26 - pointing towards the tool holder 150. The contact element 288 is at least partially ring-shaped. Here, the contact element 288 rests directly against the centering device 280. The centering receptacle 210 receives the contact element 288. The contact element 288 is arranged to overlap the anvil 270, in particular the anvil cam 274, at least partially, especially axially, as shown in Fig. 2c.

[0119] The intermediate shaft 120 includes a compensating element 290. The compensating element 290 is designed to compensate for imbalances. The compensating element 290 is formed as a conical bore in the intermediate shaft 120, see also Fig. 3a. The centering device 200 includes a centering element 220. The centering element 220 is designed to engage, at least partially, in the intermediate shaft 120. Here, the centering element 220 is formed by the anvil 270, which is formed as a single piece. Alternatively, the centering element 220 is formed as a centering cone, see also Figs. 2c and 2d. The centering element 220 is designed such that it engages, at least partially, in the compensating element 290 of the intermediate shaft 120. The mounting element 288 of the intermediate shaft 120 at least partially surrounds the centering element 220 in the circumferential direction.

[0120] Fig. 2b shows a section of a cross-section in the AA direction of the first embodiment 301 of the hand-held power tool 100. An outer diameter 244 of the gearbox cover 136 is smaller than a root diameter 342 of the ring gear 129, see also Fig. 5. The outer diameter 244 of the gearbox cover 136 is smaller than the root diameter 342 of the ring gear 129 such that the gearbox cover 136 can be accommodated within the ring gear 129. The gearbox cover 136, in particular the thrust washer, comprises a toothed rim 246. The toothed rim 246 of the gearbox cover 136 is designed to engage with the ring gear 129. The toothed rim 246 is formed on an outer circumference of the gearbox cover 136, see also Fig. 5. The toothed rim 246 and the gearbox cover 136 are, by way of example, formed in one piece. The toothed ring 246 is shaped radially outwards. The toothed ring 246 of the gearbox cover 136 can be inserted into a toothed ring 344 of the ring gear 129.The toothed ring 246 of the gearbox cover 136 and the toothed ring 344 of the ring gear 129 form a toothed connection. R. 416646.

[0121] - 27 -

[0122] Fig. 2c shows a section of a longitudinal section of the first embodiment 301 of the hand-held power tool 100. The centering collar 212 at least partially encloses the centering receptacle 210. The anvil cam 274 is arranged axially between the centering collar 212 and the tool holder 150. Fig. 2d shows a perspective view of the tool holder 150 with the anvil 270 of the first embodiment 301 of the hand-held power tool 100.

[0123] Fig. 3a shows a first perspective view of the intermediate shaft 120 of the first embodiment 301 of the hand-held power tool 100, and Fig. 3b shows a second perspective view of the intermediate shaft 120 of the first embodiment 301 of the hand-held power tool 100. The intermediate shaft 120 comprises at least one guide groove 292. The guide groove 292 is designed to receive and guide the impact ball 254. By way of example, two guide grooves 292 are provided, which are essentially V-shaped.

[0124] Fig. 4a shows a section of a longitudinal section of a second embodiment 302 of the hand-held power tool 100. Fig. 4b shows a perspective view of the tool holder 150 with the anvil 270 of the second embodiment 301 of the hand-held power tool 100. In the second embodiment 302, the centering device 200 includes a collecting element 222. The collecting element is designed to collect at least lubricants. By way of example, the collecting element 222 is formed by the anvil 270, wherein the collecting element 222 is, by way of example, designed as a blind hole with a centering bore.

[0125] Fig. 5a shows a first perspective view of the gearbox cover 136 of the hand-held power tool 100, whereas Fig. 5b shows a second perspective view of the gearbox cover 136 of the hand-held power tool 100. Fig. 6 shows a section of a longitudinal section of the hand-held power tool 100. At least one width 263 of a planet carrier collar 263 of the gearbox 118 is smaller than or substantially equal to at least one width 265 of a planet gear 262 of the gearbox 118. The planet carrier collar 261 is a collar of the planet carrier 260. Fig. 7 shows a section of a longitudinal section of a third embodiment 303 of the hand-held power tool 100. Here, the bearing element 430 is formed by a separate component 436, wherein R. 416646

[0126] - 28 - the separate component is ring-shaped. The separate component 436 is arranged axially between the gear cover 136 and the intermediate shaft 120, in particular the planet carrier 260, and most especially the planet carrier collar 261. By way of example, the gear cover 136 includes a receptacle 424 for the separate component. By way of example, the ring gear 129, the gear cover 136 and the impact mechanism cover 127 are formed in one piece.

[0127] Fig. 8a shows a section 300 of a longitudinal section of a fourth embodiment 304 of the hand-held power tool 100. An intermediate shaft bearing element 360 is arranged between the intermediate shaft 120 and the gearbox cover 136. The intermediate shaft bearing element 360 is arranged radially between the intermediate shaft 120 and the gearbox cover 136. By way of example, the intermediate shaft bearing element 360 is configured as a ball bearing. The intermediate shaft 120 includes a bearing receptacle 362, which is configured by way of example as a circumferential collar. The planet gears 262 are arranged, in particular axially, between the intermediate shaft bearing element 360 and the drive shaft bearing 180. The gearbox cover 136 includes an intermediate shaft bearing receptacle 248. The intermediate shaft bearing element 360 is arranged radially between the bearing receptacle 362 and the intermediate shaft bearing receptacle 248. The intermediate shaft 120 includes a sealing ring 350.The sealing ring 350 essentially seals the drive shaft 116 (not shown). The sealing ring 350 is arranged radially between the drive shaft 116 (not shown) and the intermediate shaft. A damping element 332 is provided, which is arranged between the gearbox cover 136 and the ring gear 129. The damping element 332 is designed as an O-ring by way of example. The damping element 332 is designed to dampen any vibrations. The ring gear 129 has a pitch circle diameter 346. The gearbox cover 136 can be guided, at least partially, by means of the pitch circle diameter 346.

[0128] Fig. 8b shows the gearbox cover 136 in the fourth embodiment 304 of the hand-held power tool 100. The gearbox cover 136 rests against the head circle diameter 346 with an outer diameter 245.

Claims

R. 416646 - 29 - Claims 1. Hand-held power tool (100) with a housing (110), with a drive motor (114) having a drive shaft (116), with a gearbox (118) that can be driven by means of the drive shaft (116), wherein the gearbox (118) has a gearbox housing (119), a gearbox cover (126) and a ring gear (129), wherein the gearbox cover (136) closes the gearbox housing (119) at least partially, and with a tool holder (150) for receiving an insert tool (140), wherein the tool holder (150) can be driven by means of the gearbox (118), characterized in that the gearbox cover (136) engages at least partially in the ring gear (129).

2. Hand-held power tool (100) according to claim 1, characterized in that the gearbox cover (136) is arranged at least partially inside the ring gear (129).

3. Hand-held power tool (100) according to claim 1 or 2, characterized in that the gearbox cover (136) has a gearbox receptacle (240) which is designed to at least partially accommodate a planet carrier (260) of the gearbox (118).

4. Hand-held power tool (100) according to one of claims 1 to 3, characterized in that a backlash compensation element (330) is arranged between the gearbox cover (136) and the ring gear (129). R. 416646 - 30 - 5. Hand-held power tool (100) according to one of the preceding claims, characterized in that the gearbox cover (136) is designed to act upon a shoulder (340) of the ring gear (129).

6. Hand-held power tool (100) according to one of the preceding claims, characterized in that an outer diameter (244) of the gear cover (136) is smaller than a base circle diameter (342) of the ring gear (129).

7. Hand-held power tool (100) according to one of the preceding claims, characterized in that the gearbox cover (136) is designed as a thrust washer.

8. Hand-held power tool (100) according to one of the preceding claims, characterized in that the gearbox cover (136) has a toothed ring (246) designed to engage with the ring gear (129).

9. Hand-held power tool (100) according to one of the preceding claims, characterized in that an intermediate shaft bearing element (360) is arranged between an intermediate shaft (120) and the gearbox cover (136).

10. Hand-held power tool (100) according to one of the preceding claims, characterized in that the ring gear (129) has a pitch circle diameter (346) by means of which the gear cover (136) can be guided at least partially.

Images