Hand-held power tool

Abstract

A hand-held power tool (100) is disclosed, having a housing (110), a drive motor (114) having a drive shaft (116), a transmission (118) which is drivable by means of the drive shaft (116), wherein the transmission (118) has a transmission housing (119), a transmission cover (136) and a hollow wheel (129), an intermediate shaft (120) which is drivable by means of the transmission (118), a bearing device (400) for bearing the intermediate shaft (120), and a tool receptacle (150) for receiving a plug-in tool (150). It is proposed that the transmission (118) is configured for configuring the bearing device (400).

Description

Technical Field

[0001] This invention relates to a handheld machine tool according to the specification. Background Technology

[0002] A handheld machine tool having a drive housing, an impact mechanism housing, and a rotary impact mechanism is known from DE 10 2017 211 774 A1. Summary of the Invention

[0003] This invention relates to a handheld machine tool, comprising: a housing; a drive motor having a drive shaft; a transmission mechanism drivable by the drive shaft, wherein the transmission mechanism has a transmission mechanism housing, a transmission mechanism cover, and a hollow wheel; an intermediate shaft drivable by the transmission mechanism; a support device for supporting the intermediate shaft; and a tool receiving section for receiving insert-type tools. It is proposed that the transmission mechanism is configured to form the support device.

[0004] This invention provides a compact handheld machine tool. Therefore, in the prior art, at least one bearing is always provided for the intermediate shaft. This bearing is typically arranged in the drive housing and / or drive cover. This invention makes it possible to eliminate this separate bearing by having the drive mechanism constitute a support for the intermediate shaft.

[0005] Handheld power tools can be configured as electrically powered handheld power tools. These electrically powered handheld power tools can be configured as grid-connected or battery-powered handheld power tools. For example, a handheld power tool can be configured as a screwdriver, a drilling screwdriver, an impact drilling screwdriver, an impact screwdriver, or a rotary impact screwdriver.

[0006] The housing of the handheld machine tool is configured to at least partially receive the drive motor, transmission, impact mechanism, and tool receiving section. The housing may be configured as a shield housing with two half-covers.

[0007] The handheld machine tool has a drive unit. The drive unit includes a drive motor and a transmission. The drive motor can be an electronically commutated drive motor. In particular, the drive motor can be configured as at least one electric motor. The drive motor is configured such that it can be operated by a manual switch. If the manual switch is operated by the user, the drive motor is turned on and the handheld machine tool is put into operation. If the manual switch is not operated by the user, the drive motor is turned off. Preferably, the drive motor can be electronically controlled and / or regulated to enable reverse operation and preset of a desired rotational speed. In reverse operation, the drive motor can switch between right-hand and left-hand rotation directions. To switch the drive motor in reverse operation, the handheld machine tool can have a rotation direction switching element, in particular a rotation direction switching switch.

[0008] The drive motor has a drive shaft. The drive shaft is supported in the housing by at least one drive shaft bearing. The drive motor can drive a transmission, an impact mechanism, and / or a tool receiver by means of the drive shaft. The drive shaft bearing can be exemplarily constructed as a ball bearing, needle roller bearing, rolling bearing, or sliding bearing. The drive shaft bearing can be arranged on the end of the drive motor facing the tool receiver. The drive shaft bearing can be arranged, particularly axially, between the transmission and the drive motor. The drive shaft can extend into an intermediate shaft. The drive shaft bearing can be arranged in the intermediate shaft such that the drive shaft is supported in the intermediate shaft by means of the drive shaft bearing. Furthermore, additional drive shaft bearings can be provided for supporting the drive shaft. The additional drive shaft bearings can be arranged on the end of the drive motor opposite to the tool receiver. The additional drive shaft bearings can be exemplarily constructed as ball bearings, rolling bearings, or sliding bearings. The drive shaft can have a sealing element. The sealing element can be configured to at least partially seal the transmission and / or impact mechanism relative to the drive motor. The sealing element can be arranged around the drive shaft in the circumferential direction. The sealing element can be connected to a transmission cover or to the drive shaft. The sealing element can be fitted into the teeth of the drive shaft. The sealing element can have corresponding teeth. The sealing element can be axially arranged between the drive motor (especially the spacer element of the drive motor rotor) and the transmission (especially the planetary gears or planetary gears).

[0009] The drive shaft is configured to drive a transmission. The transmission can be configured as at least one planetary transmission, wherein it can be, for example, shiftable. In the case of a shiftable transmission, switching between at least two gear levels can be performed by means of at least one gear shifting element, particularly a gear shifting switch. The transmission can have a transmission housing and a transmission cover. The transmission can have a hollow wheel. The hollow wheel can, in particular, axially abut against the transmission housing. The transmission cover is configured to at least partially close the transmission housing. Furthermore, the transmission cover can be configured to at least partially fit into the hollow wheel. Here, the transmission cover can be configured to at least partially fit into the inner circumference of the hollow wheel.

[0010] Handheld machine tools may have an impact mechanism. This impact mechanism generates high torque peaks during operation to loosen or tighten fixed connections or to drill holes. The impact mechanism may be connected to a drive motor via a transmission. The impact mechanism may be configured as, for example, a rotary impact mechanism, a ratchet impact mechanism, a rotating impact mechanism, a V-groove impact mechanism, or a hammering mechanism. The transmission and / or the impact mechanism may have an intermediate shaft. For example, the intermediate shaft may receive planetary gears from the transmission. It is possible that the intermediate shaft has a planet carrier for receiving the planetary gears from the planetary transmission. Furthermore, the intermediate shaft may at least partially drive the impact mechanism. The impact mechanism may have an impact mechanism housing and / or an impact mechanism cover. It is possible that the transmission housing and the impact mechanism housing, as well as the transmission cover and the impact mechanism cover, are integral. Furthermore, the impact mechanism may have a striker, at least one impact mechanism spring, at least one impact mechanism ball, and at least one impact cam. Here, the striker and the impact mechanism spring may be substantially arranged within the impact mechanism housing. The impact mechanism spring can be exemplarily constructed as a helical spring, barrel spring, conical spring, chimney spring, or profile spring. The impact mechanism cover can be arranged, particularly axially, between the impact mechanism (especially the striker and the impact mechanism spring) and the drive motor. The impact mechanism ball configuration is used to connect the striker to the intermediate shaft. For example, two impact mechanism balls can be provided. Furthermore, the impact mechanism has an anvil with an anvil body and at least one anvil cam. For example, two anvil cams can be constructed. The impact mechanism is configured such that the striker drives the anvil cam via an impact cam. When the striker rotates during the non-impact operation of the impact mechanism, this rotation is transmitted to the anvil cam via the impact cam. During the impact operation of the impact mechanism, the impact cam strikes the anvil cam in the circumferential direction to continue driving the anvil cam. For example, two impact cams can be provided. The tool receiver can be connected to the anvil. It is feasible that the tool receiver constitutes the anvil. Furthermore, it is conceivable that the tool receiver and the anvil are integral.

[0011] The intermediate shaft can be driven by a transmission. The intermediate shaft may have a guide element. The guide element may be configured to guide the impactor. The intermediate shaft has the guide element. The guide element is configured to guide the impactor of the impact mechanism at least axially. Here, the guide element is configured such that it guides the impactor both in the non-impact operation and in the impact operation of the impact mechanism. When the impactor is tightened during the operation of the impact mechanism, the guide element axially guides the impactor toward the transmission or drive motor. The guide element may be configured, for example, as a cylindrical or hollow cylindrical shape. The guide element has a guide surface. The guide surface is configured such that the impactor can be guided at least axially on the guide surface. The guide surface may be constructed on the outer periphery of the intermediate shaft.

[0012] A centering device can be provided, configured to center the intermediate shaft. This centering device ensures the intermediate shaft is centered both during non-impact operation and during impact operation. The intermediate shaft can be centered relative to the tool axis. The centering device can be constructed on the intermediate shaft and / or on the tool receiving section. The diameter of the guide element and the diameter of the centering device are substantially the same. It is also conceivable that these two diameters are identical. Here, a small deviation of up to 2 mm between these two diameters should also be understood as identical.

[0013] The transmission mechanism is designed to form a support device. Therefore, a separate intermediate shaft bearing can be omitted.

[0014] The handheld power tool has a tool receiving section. The tool receiving section can be configured as an internal tool receiving section, such as a bit receiving section, and / or as an external tool receiving section, such as a socket receiving section. It is also conceivable that the tool receiving section is configured as a drill chuck. The tool receiving section can receive insert tools, such as screwdriver bits or socket wrenches, allowing the user to establish a threaded connection of the fastening element with a fastening bracket. The handheld power tool can have a tool axis. Here, the axis of rotation of the tool receiving section can constitute the tool axis. In particular, "axial" should be understood as substantially parallel to the tool axis, while "radial" should be understood as substantially perpendicular to the tool axis. The tool receiving section can be rotatably supported in the impact mechanism housing and / or the transmission housing by means of a tool receiving section support element. The tool receiving section support element can be configured, for example, as a sliding bearing or at least one ball bearing. It is feasible that the tool receiving section has, for example, two or three tool receiving section support elements.

[0015] Additionally, the handheld machine tool includes an energy supply unit configured for battery operation, particularly a handheld machine tool battery pack, and / or grid operation. In a preferred embodiment, the energy supply unit is configured for battery operation. Within the scope of this invention, "handheld machine tool battery pack" should be understood as a combination of at least one battery cell and a battery pack housing. The handheld machine tool battery pack is advantageously configured to supply energy to a commercially available battery-operated handheld machine tool. The at least one battery cell may, for example, be a lithium-ion battery cell with a nominal voltage of 3.6 V. Exemplarily, a handheld machine tool battery pack may include up to ten battery cells, wherein other numbers of battery cells are also conceivable. The implementation of a battery-operated handheld machine tool and its operation as a grid-operated handheld machine tool are well known to those skilled in the art, and therefore the details of the energy supply unit are not discussed in detail here.

[0016] The handheld power tool may have at least a control unit for controlling the drive unit. The control unit may be located within the housing, for example, in the handle of the handheld power tool or in the area of ​​the power supply interface.

[0017] In one embodiment of the handheld machine tool, the support device has an axial support device that is at least partially, particularly axially, constructed between the intermediate shaft and the drive cover. Here, axial can be understood as relative to the tool axis and / or relative to the drive shaft. The axial support device enables axial support of the intermediate shaft. The axial support device is configured such that the intermediate shaft can be arranged relative to the drive cover.

[0018] In one embodiment of a handheld machine tool, the axial support device has at least one support element configured in a circumferential direction relative to the drive shaft. The support element may be configured on an intermediate shaft, planetary carrier, and / or transmission cover. It is feasible for the support element to be connected to the intermediate shaft, planetary carrier, and / or transmission cover, wherein, it is also conceivable, that it is integral. The support element may be configured in a circumferential direction relative to the drive shaft or relative to the tool axis. The support element may be configured as at least partially surrounding a ring, web, or protrusion.

[0019] In one embodiment of the handheld machine tool, a support element is radially arranged between the drive shaft and the hollow wheel. Here, radial should be understood as radial relative to the tool axis or relative to the drive shaft. The support element can be radially arranged and constructed on an intermediate shaft between the drive shaft and the hollow wheel. Alternatively, the support element and the intermediate shaft can be integral. It is conceivable that the support element is radially arranged between the drive shaft and the planetary gear pins. Here, the planetary pins are constructed to rotatably arrange the planetary gears on the planet carrier.

[0020] In one embodiment of the handheld machine tool, the axial support device has at least one support receiving portion configured to receive a support element. The support receiving portion can be arranged and / or constructed on the drive cover, intermediate shaft, and / or planetary carrier. Alternatively, the support receiving portion can be integral with the drive cover, intermediate shaft, and / or planetary carrier. The support receiving portion can receive the support element such that the intermediate shaft is supported relative to the drive cover. Here, the support element and the support receiving portion enable low-friction support of the intermediate shaft. The support receiving portion can be constructed in the circumferential direction relative to the drive shaft. The support receiving portion can be constructed as a support surface. Here, the support surface can be constructed in the form of a substantially flat surface, for example, constructed as an annular or disc-shaped surface. The support receiving portion can be constructed, for example, by the drive cover. Here, the support receiving portion and the drive cover can thus be integral. Alternatively, the support element can be constituted by a separate component. The separate component can be, for example, annular. Furthermore, the separate component can be axially arranged between the drive cover and the intermediate shaft (especially the planetary carrier). Accordingly, the drive cover can here have a receiving portion for the separate component.

[0021] In one embodiment of the handheld machine tool, the axial support device has at least one additional support element, wherein the support element is radially arranged between the drive shaft and the additional support element. The additional support element may also be arranged in a circumferential direction relative to the drive shaft. The additional support element may be constructed similarly to the support element. The support receiving portion may be configured to receive both the support element and the additional support element.

[0022] In one embodiment, the support device has at least one lubricant receiver configured to receive lubricant from the support device. The lubricant receiver can receive a lubricant, such as a lubricant, like a transmission grease. The lubricant receiver can be radially arranged between the support element and another support element. The lubricant receiver can, for example, be configured as a groove that at least partially surrounds the support. The lubricant receiver can be arranged and / or configured on the intermediate shaft, planetary carrier, and / or transmission cover. Alternatively, the lubricant receiver can be integral with the intermediate shaft, planetary carrier, and / or transmission cover.

[0023] In one embodiment of the handheld machine tool, the support device has a radial support device, which is at least partially, particularly radially, constructed between the intermediate shaft and the hollow wheel. The radial support device enables radial support of the intermediate shaft within the transmission housing. The support device includes both axial and radial support devices.

[0024] In one embodiment of the handheld machine tool, at least one planetary gear and a hollow wheel of the transmission are configured to constitute the radial support device. The transmission may be configured as a planetary transmission, wherein the planetary transmission has at least one planetary gear. It is feasible to provide multiple planetary gears for the planetary transmission, such as two, three, or more than three planetary gears. Three planetary gears are provided exemplarily here. Here, the planetary gears and hollow wheel are configured such that they constitute the radial support device, thereby receiving radial forces during the operation of the intermediate shaft and introducing them into the transmission housing. Radial support is substantially indirectly provided through these three planetary gears.

[0025] In one embodiment of the handheld machine tool, at least one width of the planetary carrier flange of the drive is less than or substantially equal to at least one width of the planetary gears of the drive. The planetary carrier flange is, in this context, the flange of the planetary carrier of the drive. Alternatively, the planetary carrier flange may also be the intermediate shaft flange. The planetary gears, in addition to their width, also have a planetary gear diameter.

[0026] In one embodiment of the handheld machine tool, the opening of the transmission cover is smaller than or substantially equal to the opening of the intermediate shaft. The transmission cover has a central opening. The drive shaft is guided into the transmission through said central opening. The intermediate shaft also has a central opening. The drive shaft is guided into the transmission through the central opening of the intermediate shaft. The diameter of the opening of the transmission cover is smaller than or substantially equal to the diameter of the opening of the intermediate shaft. The openings of the transmission cover and the intermediate shaft are arranged axially adjacent to each other. The opening of the intermediate shaft may have a ramp, where the diameter of the opening of the intermediate shaft increases from the motor side to the tool side.

[0027] In one embodiment, the centering device and the anvil are arranged to at least partially overlap each other. The centering device and the anvil (especially the anvil cam) overlap at least partially, especially axially. The intermediate shaft may be arranged to at least partially overlap with the anvil, especially the anvil cam.

[0028] In one embodiment, the centering device has a centering receiver configured to at least partially surround the intermediate shaft. The anvil may at least partially constitute the centering device. The centering receiver may be configured as a centering notch. The centering receiver may be configured opposite to a tool receiver. The centering receiver may be configured, for example, in a can shape, a cover shape, or a disc shape. The diameter of the centering receiver may be substantially the same as the diameter of the guide element, allowing the intermediate shaft to be received by the guide element. Simultaneously, the intermediate shaft may also rotate relative to the tool receiver. The centering receiver may at least partially surround the intermediate shaft, particularly the guide element, such that they are arranged to overlap each other in sections, particularly axially. The centering receiver may be radially arranged between the intermediate shaft and the impactor, particularly the impact cam.

[0029] In one embodiment, the centering device has a centering flange configured to at least partially abut against the intermediate shaft. The centering flange may be configured on an anvil. The centering flange may be, for example, annular or configured as a surrounding web. The centering flange may at least partially abut against the intermediate shaft, particularly a guide element. Centering of the intermediate shaft can thus occur. The tool receiver can be centered by a tool receiver support element, such that centering of the intermediate shaft is achieved by means of the centering flange. The centering flange may at least partially surround the centering receiver. An anvil cam may be axially arranged and / or configured between the centering flange and the tool receiver. The centering device with the centering receiver and the centering flange provides a sufficiently long guide length for the intermediate shaft to ensure centering.

[0030] In one embodiment, the centering flange can be arranged to at least partially overlap with the striker. The centering flange can be constructed on the anvil. Here, the centering flange can be, for example, annular or configured as a circumferential web. The centering flange can be arranged overlapping with the striker, especially the impact body, during non-impact operation. The centering flange can extend into the closed diameter of the striker in the striker position. The centering flange can be arranged radially between the intermediate shaft and the striker, especially the impact body.

[0031] In one embodiment, the intermediate shaft has at least one abutment element configured to at least partially abut against the centering device and receive at least the axial force of the centering device. The abutment element may be configured on an end side of the intermediate shaft. The end side may point in the direction of the tool receiving portion. Exemplarily, the abutment element may be at least partially configured as annular. Alternatively, the abutment element may also be configured as a web. The abutment element abuts against the centering device such that the axial force can be transmitted from the tool receiving portion through the centering device to the intermediate shaft. The axial force can then be further transmitted through the intermediate shaft to the transmission housing. The abutment element may abut directly against the centering device. For this purpose, the centering receiving portion may receive the abutment element. The abutment element can then abut within the centering receiving portion.

[0032] In one embodiment, the abutment element is arranged to at least partially overlap with the anvil. The abutment element is arranged to at least partially overlap axially with the anvil, particularly the anvil cam. This overlap between the abutment element and the anvil cam allows for a more compact structural form.

[0033] In one embodiment, the intermediate shaft has a compensating element configured to compensate for imbalance. The compensating element may be configured as a tapered bore in the intermediate shaft. The compensating element improves concentricity accuracy and reduces imbalance.

[0034] In one embodiment, the centering device has a centering element configured to at least partially engage with an intermediate shaft. The centering element may be an anvil. Alternatively, the centering element and the anvil may be integral. The centering element may, for example, be configured as a centering cone. The centering element may at least partially engage with a compensating element of the intermediate shaft. The centering element may abut against the compensating element of the intermediate shaft. Thus, the centering cone can abut against a tapered bore and additionally center the intermediate shaft. The abutting element of the intermediate shaft may at least partially surround the centering element in the circumferential direction.

[0035] In one embodiment, the centering device has a collecting element configured to collect at least some lubricating material. The collecting element may be an anvil. The collecting element may, for example, be configured as a blind hole with a centering aperture. The collecting element enables the lubricating material to be collected at least partially within the impact mechanism. Furthermore, the collecting element achieves higher concentricity accuracy. The collecting element may be configured opposite a compensating element.

[0036] In one embodiment of the handheld machine tool, a transmission cover is at least partially disposed within a hollow wheel. The hollow wheel has an inner circumference and an internal space. The transmission cover is at least partially disposed within said inner circumference and said internal space. The transmission cover is configured to close the hollow wheel in the direction of the drive motor.

[0037] In one embodiment of the handheld machine tool, the drive cover has a drive receiver configured to at least partially receive the planetary carrier of the drive. The drive cover may constitute the drive receiver. The drive receiver may be configured, for example, as a cover, can, or disc. The drive cover and the drive receiver may be integral. The drive receiver may receive the planetary carrier of the drive at least partially and at least sectionally. The planetary carrier and the drive receiver may be spaced apart from each other and / or abut against each other. An intermediate shaft may constitute the planetary carrier. The drive receiver may also be configured as an intermediate shaft receiver. The intermediate shaft and the intermediate shaft receiver may be spaced apart from each other and / or abut against each other.

[0038] In one embodiment of the handheld machine tool, particularly in the axial direction, a clearance compensation element is arranged between the drive housing and the hollow wheel. The clearance compensation element is configured to compensate for axial and / or radial clearance. Here, the clearance compensation element compensates for axial clearance by applying an axial force to the hollow wheel, the intermediate shaft, the anvil from the intermediate shaft, and correspondingly to the tool receiving portion. In this way, the axial clearance between the drive housing, the intermediate shaft, and the anvil is reduced, particularly minimized to essentially 0 mm. The clearance compensation element is configured to preload the intermediate shaft relative to the anvil. Furthermore, the clearance compensation element is configured to seal the drive to prevent lubricant leakage. The clearance compensation element is, for example, configured as a spring element, such as an O-ring. The drive housing can be axially arranged between the clearance compensation element and the planetary gears of the planetary drive. The clearance compensation element can rest against the drive receiving portion. The clearance compensation element can be radially arranged between the drive receiving portion and the hollow wheel. Here, the clearance compensation element can radially center the drive housing. Additionally, the clearance compensation element dampens minor movements of the drive housing.

[0039] In one embodiment of the handheld machine tool, the transmission cover is configured to load a step on a hollow wheel. The hollow wheel has at least partially surrounding the step. Here, the hollow wheel can form the step, and it can also be integral. Alternatively, the step on the hollow wheel can also be configured to be surrounding. The step on the hollow wheel is configured towards the drive shaft. Here, the step on the hollow wheel can be configured radially towards the drive shaft. The transmission cover can be configured to load the step on the hollow wheel via a clearance compensation element. The transmission cover can abut against the clearance compensation element. The clearance compensation element can abut against the step on the hollow wheel. It is also conceivable that the transmission cover abuts against the hollow wheel. Here, the hollow wheel can be configured to at least partially axially fix the transmission cover via the step.

[0040] In one embodiment of the handheld machine tool, the outer diameter of the transmission cover is smaller than the root circle diameter of the hollow wheel. The root circle diameter is, in this case, the maximum inner diameter of the hollow wheel. The smaller outer diameter of the transmission cover allows it to be received within the hollow wheel.

[0041] In one embodiment of the handheld machine tool, the transmission cover is configured as a stop disc. The stop disc can be configured, for example, as a thin plate, a disc, an annular shape, a cover, or a dish.

[0042] In one embodiment, the drive cover, particularly the stop plate, has a wall thickness of less than 1.5 mm. The wall thickness of the drive cover can be the same as the wall thickness of the stop plate. Alternatively, the wall thickness of the drive cover can be less than 1 mm.

[0043] In one embodiment of the handheld machine tool, the drive cover, particularly the stop disc, has a gear ring configured to engage with a hollow wheel. The gear ring can be constructed on the outer periphery of the drive cover. Alternatively, the gear ring and the drive cover can be integral. The gear ring can be configured to point radially outward. Thus, the gear ring can be constructed radially toward the housing and / or radially away from the drive shaft. The gear ring of the drive cover can be inserted into the gear ring of the hollow wheel. In this way, the gear ring of the drive cover and the gear ring of the hollow wheel can form a toothed section.

[0044] In one embodiment of the handheld machine tool, an intermediate shaft support element is arranged between the intermediate shaft and the driveshaft cover. The intermediate shaft support element may be radially arranged between the intermediate shaft and the driveshaft cover. The intermediate shaft support element may be, for example, a ball bearing, a plain bearing, or the like. The intermediate shaft may have a support receiving portion, which may be configured, for example, as a circumferential flange. Planetary gears may be arranged, particularly axially, between the intermediate shaft support element and the driveshaft bearing. The driveshaft cover may have an intermediate shaft support receiving portion. The intermediate shaft support element may be radially arranged between said support receiving portion and the intermediate shaft support receiving portion.

[0045] In one embodiment of the handheld machine tool, the hollow wheel has a tip circle diameter by which the drive cover can be at least partially guided. The tip circle diameter is the minimum diameter of the toothed ring of the hollow wheel. The drive cover can be abutted against the tip circle diameter with an outer diameter. Thus, the drive cover can be guided at least radially. A damping element can be arranged between the drive cover and the hollow wheel. Attached Figure Description

[0046] The present invention will now be explained with reference to preferred embodiments. The following figures illustrate this: Figure 1 : A schematic view of a handheld machine tool according to the present invention; Figure 2a A partial longitudinal section of the first embodiment of the handheld machine tool; Figure 2b A partial cross-section of the first embodiment of the handheld machine tool; Figure 2c A partial longitudinal section of the first embodiment of the handheld machine tool; Figure 2d A perspective view of a tool receiving section with an anvil, according to a first embodiment of a handheld machine tool; Figure 3a First perspective view of the intermediate shaft of the first embodiment of the handheld machine tool; Figure 3b : A second perspective view of the intermediate shaft of the first embodiment of the handheld machine tool; Figure 4aA partial longitudinal section of the second embodiment of the handheld machine tool; Figure 4b A perspective view of the tool receiving section with an anvil in a second embodiment of a handheld machine tool; Figure 5a First perspective view of the transmission cover of a handheld machine tool; Figure 5b Second perspective view of the transmission cover of a handheld machine tool; Figure 6 A partial longitudinal section of a handheld machine tool; Figure 7 A partial longitudinal section of the third embodiment of the handheld machine tool; Figure 8a Partial longitudinal section of the fourth embodiment of the handheld machine tool; Figure 8b The transmission cover of the fourth embodiment of the handheld machine tool; Detailed Implementation

[0047] Figure 1 A handheld power tool 100 according to the present invention is shown, configured as an exemplary battery-operated rotary impact wrench 100. The handheld power tool 100 includes an output shaft 124 and a tool receiving section 150. The handheld power tool 100 has a housing 110 with a handle 126. The handheld power tool 100 can be mechanically and electrically connected to an energy supply unit for battery operation so as to be independent of the mains power supply, thereby configuring the handheld power tool 100 as a battery-operated handheld power tool 100. A battery pack 130 is used herein as the energy supply unit. However, the invention is not limited to battery-operated handheld power tools, but can also be applied to grid-dependent, i.e., grid-operated handheld power tools.

[0048] Housing 110 includes a drive unit 111. The drive unit 111 is arranged within housing 110. The drive unit 111 includes an electronically commutated drive motor 114 powered by a handheld machine tool battery pack 130, and a transmission 118. The drive motor 114 includes a stator 165, motor terminals 166, a rotor 167, and a rotor magnet 168, see FIG. 2. The transmission 118 is configured as at least one planetary transmission. The drive motor 114 is designed to be actuated, for example, by a manual switch 128, allowing the drive motor 114 to be turned on and off. Advantageously, the drive motor 114 can be electronically controlled and / or regulated to enable reverse operation and a desired rotational speed. For reverse operation, the handheld machine tool 100 has a rotation direction switching element 121, configured as a rotation direction switching switch. The rotation direction switching element 121 is configured to switch the drive motor 114 between right-hand and left-hand rotation directions. The structure and operation of a suitable drive motor are well known to those skilled in the art, and therefore will not be discussed in detail here.

[0049] Transmission 118 is connected to drive motor 114 via drive shaft 116. Drive shaft 116 is supported in housing 110 by drive shaft bearing 180 and another drive shaft bearing (not shown), see FIG. 2. Transmission 118 is configured to convert rotation of drive shaft 116 into rotation between transmission 118 and tool receiver 150. Transmission 118 includes transmission housing 119, transmission cover 136 and hollow wheel 129, wherein transmission cover 136 at least partially closes transmission housing 119, also see FIG. 2.

[0050] A handheld power tool 100 configured as a battery-operated rotary impact screwdriver includes a rotary impact mechanism 122 with an intermediate shaft 120, also see FIG. 2. Both the rotary impact mechanism 122 and the intermediate shaft 120 are arranged in a housing 110. Preferably, the conversion from rotation of the drive shaft 116 to rotation of the tool receiving section 150 is performed via the intermediate shaft 120. Here, the intermediate shaft 120 rotates relative to the drive shaft 116 with an increased torque but a decreased rotational speed. Here, the drive shaft 116 extends exemplarily into the intermediate shaft 120, see FIG. 2. Here, exemplarily, a drive shaft bearing 180 is substantially arranged in the intermediate shaft 120, such that the drive shaft 116 is substantially supported in the intermediate shaft 120 by means of the drive shaft bearing 180. The rotary impact mechanism 122 includes an impact mechanism housing 123, wherein the rotary impact mechanism 122 may also be arranged in another suitable housing, such as a transmission housing 119. The rotary impact mechanism 122 is configured to drive an output shaft 124. The rotary impact mechanism 122 includes an impact mechanism cover 127 that closes the rotary impact mechanism 122 toward the drive motor 114. Exemplarily, the actuator cover 136 and the impact mechanism cover 127 are integral. Furthermore, exemplarily, the actuator housing 119 and the impact mechanism housing 123 are integral.

[0051] The handheld power tool 100 includes a tool axis 102, wherein the rotation axis of the tool receiver 150 constitutes the tool axis 102. The tool receiver 150 is provided on an output shaft 124. Preferably, the tool receiver 150 is formed and / or constructed on the output shaft 124. Preferably, the tool receiver 150 is arranged in an axial direction 132 away from the drive unit 111. The tool receiver 150 is configured as an internal hexagonal receiver, arranged in the manner of a bit holder, for receiving an insert tool 140. The insert tool is formed as a screwdriver bit with an external polygonal coupling 142. The type of screwdriver bit, such as according to the HEX type, is well known to those skilled in the art. However, the invention is not limited to the use of HEX screwdriver bits, but other tool receivers that seem reasonable to those skilled in the art can also be used, such as HEX drill bits, SDS-Quick insert tools, sockets, or round shank drill chucks. Furthermore, the structure and operation of suitable bit holders are well known to those skilled in the art. The tool receiving section 150 is rotatably supported in the impact mechanism housing 123 and / or the transmission housing 119 by means of a tool receiving section support element 190. The tool receiving section support element 190 is exemplarily formed as a ball bearing, and two tool receiving section support elements 190 are provided here.

[0052] The handheld power tool 100 has a control unit 170 for controlling the drive unit 111, particularly the drive motor 114. The housing 110 at least partially receives the control unit 170. The control unit 170 has a microprocessor, not shown in detail.

[0053] Furthermore, the housing 110 includes a power supply retention device 160. The power supply retention device 160 receives the handheld machine tool battery pack 130 and forms a support leg 162 thereon with a supporting surface. The handheld machine tool battery pack 130 can be detached from the power supply retention device 160 without tools. Additionally, the housing 110 has a handle 126 and the power supply retention device 160. The handle 126 can be gripped by a user. In one embodiment, the power supply retention device 160 is arranged on the handle 126. The handheld machine tool 100 can be placed on the support leg 162.

[0054] Figure 2a A partial longitudinal section 300 of a first embodiment 301 of a handheld power tool 100 is shown. A transmission cover 136 is configured to at least partially enclose the transmission housing 119. Furthermore, a transmission cover 126 is configured to at least partially engage with a hollow wheel 129. The transmission cover 136 is disposed to at least partially engage with the inner circumference 266 of the hollow wheel 129. The hollow wheel 129 rests, particularly axially, against the transmission housing 119. The drive shaft 116 includes a sealing element 117, which is configured to at least partially seal the transmission 118 and / or the impact mechanism 122, particularly the rotary impact mechanism 122, relative to the drive motor 114. Here, the sealing element 117 is arranged circumferentially around the drive shaft 116. Here, the sealing element 117 is exemplarily connected to the drive shaft 166. A sealing element 117 is axially arranged between a drive motor 114 (particularly a spacer element 164 of the rotor 167 of the drive motor 114) and a transmission 118 (particularly a planetary gear 262 or more planetary gears 262). The handheld machine tool 100 includes a support 400. The transmission 118 is configured to form the support 400.

[0055] The rotary impact mechanism 122 is connected to the drive motor 114 via a transmission 118. The transmission 118 and / or the rotary impact mechanism 122 include an intermediate shaft 120. Here, the intermediate shaft 120 receives the planetary gears 262 of the transmission 118. Furthermore, the intermediate shaft 120 includes a planet carrier 260 for receiving the planetary gears 262 of the planetary transmission. The intermediate shaft 120 at least partially drives the rotary impact mechanism 122. The rotary impact mechanism 122 includes an impactor 250, at least one impact mechanism spring 252, at least one impact mechanism ball 254, and at least one impact cam 256. The impactor 250 and the impact mechanism spring 252 are substantially arranged within the impact mechanism housing 123. The impact mechanism spring 252 is exemplarily formed as a helical spring. An impact mechanism cover 127 is arranged, particularly axially, between the rotary impact mechanism 122 (particularly the impactor 250 and the impact mechanism spring 252) and the drive motor 114. Impact mechanism balls 254 are configured to connect the striker 250 to the intermediate shaft 120. Two impact mechanism balls 254 are provided exemplary. The rotary impact mechanism 122 also includes an anvil 270 having an anvil body 272 and at least one anvil cam 274, see also... Figure 2c The rotary impact mechanism 122 drives the striker 250 to drive the anvil cams 274 via impact cams 256. A tool receiver 150 is connected to the anvil 270, wherein, exemplarily, the tool receiver 150 is formed integrally with the anvil 270. The intermediate shaft 120 includes a guide element 280 configured to guide the striker 250, particularly axially. When the striker 250 is tightened during operation of the rotary impact mechanism 122, the guide element 280 axially guides the striker 250 toward the actuator 118 or drive motor 114. Exemplarily, the guide element 280 is cylindrical. The guide element 280 includes a guide surface 282 configured such that the striker 250 can be guided at least axially on the guide surface 282. Here, the guide surface 282 is formed on the outer periphery of the intermediate shaft 120.

[0056] The handheld machine tool includes a centering device 200. The centering device is configured to center an intermediate shaft 120. The centering device 200 is configured to center the intermediate shaft 120 both during non-impact operation and during 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 the tool receiving portion 150. The diameter 284 of the guide element 280 and the diameter 202 of the centering device 200 are substantially the same size.

[0057] The transmission cover 136 includes a transmission receiving portion 240. The transmission receiving portion 240 is configured to at least partially receive the planetary carrier 260 of the transmission 118. Here, the transmission cover 136 is formed into the transmission receiving portion 240, wherein they are integrally formed. The transmission receiving portion 240 is exemplary formed as a housing type. The transmission receiving portion 240 receives the planetary carrier 260 of the transmission 118 at least partially and at least sectionally. The transmission receiving portion 240 is also formed here as an intermediate shaft receiving portion 242.

[0058] The handheld power tool 100 includes a backlash compensation element 330. The backlash compensation element is axially arranged between the drive cover 126 and the hollow wheel 129. Here, the backlash compensation element 330 is configured to compensate for axial and / or radial backlash. The backlash compensation element 330 compensates for axial backlash by applying an axial force to the hollow wheel 129, to the intermediate shaft 120, from the intermediate shaft 120 to the anvil 270, and correspondingly to the tool receiver 150. The backlash compensation element 330 is configured to preload the intermediate shaft 120 relative to the anvil 270. The backlash compensation element 330 is configured to seal the drive 118 to prevent lubricant leakage. The backlash compensation element 330 is exemplary formed as a spring element, such as an O-ring. Here, the drive cover 136 is axially arranged between the backlash compensation element 330 and the planetary gears 262 of the planetary drive. The backlash compensation element 330 rests against the drive receiver 240. Here, a clearance compensation element 330 is radially arranged between the transmission receiver 240 and the hollow wheel 129. The hollow wheel 129 includes a step 340. The transmission cover 136 is provided for loading the step 340 of the hollow wheel 129. The step 340 is formed as a step 340 that is at least partially surrounding the hollow wheel 129. The hollow wheel 129 is formed with the step 340 so that they are integral. The step 340 of the hollow wheel 129 is constructed toward the drive shaft 116. The transmission cover 136 loads the step 340 of the hollow wheel 129 via the clearance compensation element 330. The clearance compensation element 330 abuts against the step 340 of the hollow wheel 129. The transmission cover 136 at least partially abuts against the hollow wheel 129. The hollow wheel 129 at least partially axially fixes the transmission cover 136 in place via the step 340. Axial force is introduced into the hollow wheel 129 via the drive cover 136, the clearance compensation element 330, and the step 340. The drive cover 136 is formed into a stop disc. Exemplarily, the stop disc is formed as a thin plate. The wall thickness 242 of the drive cover 136, and especially the stop disc, is less than 1.5 mm.

[0059] The support device 400 includes an axial support device 420. The axial support device 420 is at least partially, particularly axially, formed between the intermediate shaft 120 and the transmission cover 136. The axial support device 420 is formed such that the intermediate shaft 120 can be arranged relative to the transmission cover 136. The axial support device 400 includes at least one support element 430, see also... Figure 3b , 67. The support element is formed in the circumferential direction relative to the drive shaft 116. Exemplarily, the support element 430 is formed on the intermediate shaft 120, particularly the planet carrier 260. Here, the intermediate shaft 120, particularly the planet carrier 260, is connected to the support element, wherein they are integrally formed. Exemplarily, the support element 430 is formed as a surrounding web. The support element 430 is radially arranged between the drive shaft 116 and the hollow wheel 129. Here, the support element 430 is exemplary radially arranged between the drive shaft 116 and the planetary pins 264 of the planetary gears 262 of the transmission 118. The planetary pins 264 are configured to rotatably arrange the planetary gears 262 on the planet carrier 260. The axial support device 420 includes at least one support receiving portion 422. The support receiving portion 422 is configured to receive the support element 430. Exemplarily, a support receiver 422 is arranged and formed on the drive cover 136 such that the support receiver 422 and the drive cover 136 are integral. The support receiver 422 receives a support element 422 such that the intermediate shaft 120 is supported relative to the drive cover 136. The support receiver 422 is formed in the circumferential direction relative to the drive shaft 116. Exemplarily, the support receiver 422 is formed as a support surface, which is formed in a disc shape. The support receiver 422 is exemplary formed by the drive cover 136. The axial support device 420 includes at least one additional support element 432. The support element 430 is arranged radially between the drive shaft 116 and the additional support element 432. The additional support element 432 is arranged in the circumferential direction relative to the drive shaft 116. The additional support element 432 is formed as a surrounding web. The support receiver 422 is formed such that it can receive both the support element 430 and the additional support element 432. The support device 400 includes at least one lubricant receiving portion 434. The lubricant receiving portion 434 is formed to receive lubricant from the support device 400. Here, the lubricant receiving portion 434 receives a lubricant, such as a lubricant like transmission grease. The lubricant receiving portion 434 is radially arranged between the support element 430 and another support element 432. Exemplarily, the lubricant receiving portion 434 is formed as a circumferential groove. The lubricant receiving portion 434 is arranged and formed on the intermediate shaft 120, particularly the planetary carrier 260. Thus, the lubricant receiving portion 434 is integral with the intermediate shaft 120, particularly the planetary carrier 260. The support device 400 includes a radial support device 440. The radial support device 440 is at least partially, particularly radially, formed between the intermediate shaft 120 and the hollow wheel 129. The support device 400 has an axial support device 420 and a radial support device 440. At least one of the planetary gears 262 and the hollow gear 129 of the transmission 118 are shaped to form a radial support device 440. A plurality of planetary gears 262 are provided here, exemplarily three planetary gears 262. Radial support is substantially indirectly provided through these three planetary gears 262.

[0060] The drive cover 136 includes a central opening 243. The intermediate shaft 120 includes a central opening 286. The opening 243 of the drive 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 drive unit 118 through the opening 243 of the drive cover 136 and through the opening 286 of the intermediate shaft 120. Here, the diameter 247 of the opening 243 of the drive cover 136 is smaller than or substantially equal to the diameter 287 of the opening 286 of the intermediate shaft 120, see also... Figure 3b 5. The opening 243 of the transmission cover 136 and the opening 186 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, at which the diameter 287 of the opening 286 of the intermediate shaft 120 increases from the motor side to the tool side.

[0061] The centering device 200 and the anvil 270 are arranged to at least partially overlap each other. Here, the centering device 200 and the anvil 270, especially the anvil cam 274, overlap at least partially, particularly axially, as also seen in... Figure 2c Furthermore, the intermediate shaft 120 is arranged to at least partially overlap with the anvil 270, and in particular the anvil cam 274, see also Figure 2c The centering device 200 includes a centering receiver 210. The centering receiver is shaped to at least partially surround the intermediate shaft 120. Here, the anvil 270 is exemplary at least partially formed of the centering device 200. The centering receiver 210 is shaped as a centering recess, wherein the centering receiver 210 is formed opposite to the tool receiver 150. Exemplarily, the centering receiver 210 is shaped as a can. The diameter of the centering receiver 210 here coincides with the diameter 202 of the centering device 200. The diameter of the centering receiver 210 is substantially the same size as the diameter 284 of the guide element 280. The intermediate shaft 120 is rotatable relative to the tool receiver 150. The centering receiver 210 at least partially surrounds the intermediate shaft 120, particularly the guide element 280. The centering receiver 210 is radially arranged between the intermediate shaft 120 and the impactor 250, particularly the impact cam 256, see also Figure 2cThe centering device 200 includes a centering flange 212. The centering flange is shaped to at least partially abut against the intermediate shaft 120. Here, the centering flange 212 is shaped on the anvil 270, wherein the anvil is shaped as a circumferential web. The centering flange 212 at least partially abuts against the intermediate shaft 120, particularly the guide element 280. Thus, the centering device 200 centers the intermediate shaft 120 via the centering flange 212. The tool receiver 150 is centered by the tool receiver support element 190. The centering flange 212 can be arranged to at least partially overlap with the striker 250. The centering flange 212 is shaped on the anvil 270. In non-impact operation, the centering flange 212 and the striker 250, particularly the impact body 258, overlap. The centering flange 212 extends into the closed diameter of the striker at the striker position. Here, a centering flange 212 is radially arranged between the intermediate shaft 120 and the impactor 250 (especially the impact body 258). The intermediate shaft 120 includes at least one abutment element 288. The abutment element 288 is formed to at least partially abut against the centering device 200 and receive at least the axial force of the centering device 200. The abutment element 288 is formed on the end side 289 of the intermediate shaft 120, see also Figure 3a Here, end face 289 points towards tool receiving portion 150. The abutment element 288 is at least partially formed as an annular shape. Here, the abutment element 288 directly abuts against the centering device 280. The centering receiving portion 210 receives the abutment element 288. The abutment element 288 is arranged to at least partially, particularly axially, overlap with the anvil 270, particularly the anvil cam 274, see also... Figure 2c .

[0062] The intermediate shaft 120 includes a compensating element 290. The compensating element 290 is shaped to compensate for imbalance. Here, the compensating element 290 is shaped as a tapered bore in the intermediate shaft 120, see also [reference needed]. Figure 3a The centering device 200 includes a centering element 220. The centering element 220 is shaped to at least partially fit into the intermediate shaft 120. Here, the centering element 220 is exemplary shaped from an anvil 270, wherein they are integrally formed. Exemplarily, the centering element 220 is shaped as a centering cone, see also... Figure 2c and 2d The centering element 220 is configured such that it at least partially engages with the compensating element 290 of the intermediate shaft 120. The abutment element 288 of the intermediate shaft 120 at least partially surrounds the centering element 220 in the circumferential direction.

[0063] Figure 2bA partial cross-section along the AA direction is shown of a first embodiment 301 of the handheld machine tool 100. The outer diameter 244 of the drive cover 136 is smaller than the root circle diameter 342 of the hollow wheel 129, also see FIG. 5. The smaller outer diameter 244 of the drive cover 136 allows the drive cover 136 to be received within the hollow wheel 129. The drive cover 136, particularly the stop disc, includes a gear ring 246. The gear ring 246 of the drive cover 136 is configured for engagement with the hollow wheel 129. The gear ring 246 is formed on the outer periphery of the drive cover 136, also see FIG. 5. Here, the gear ring 246 and the drive cover 136 are exemplary integral. The gear ring 246 is formed to point radially outward. The gear ring 246 of the drive cover 136 can be inserted into the gear ring 344 of the hollow wheel 129. The gear ring 246 of the transmission cover 136 and the gear ring 344 of the hollow wheel 129 form a toothed section.

[0064] Figure 2c A partial longitudinal section of a first embodiment 301 of the handheld machine tool 100 is shown. A centering flange 212 at least partially surrounds a centering receiver 210. Anvil cam 274 is axially arranged between the centering flange 212 and the tool receiver 150. Figure 2d A perspective view of a tool receiving section 150 with an anvil 270 is shown in the first embodiment 301 of a handheld power tool 100.

[0065] Figure 3a A first perspective view of the intermediate shaft 120 of the first embodiment 301 of the handheld machine tool 100 is shown, and Figure 3b A second perspective view of the intermediate shaft 120 of a first embodiment 301 of a handheld machine tool 100 is shown. The intermediate shaft 120 includes at least one guide groove 292. The guide groove 292 is configured to receive and guide impact mechanism balls 254. Two guide grooves 292 are provided exemplary, and they are shaped substantially V-shaped.

[0066] Figure 4a A partial longitudinal section of a second embodiment 302 of the handheld machine tool 100 is shown. Figure 4b A perspective view of a tool receiving portion 150 with an anvil 270 is shown in a second embodiment 301 of a handheld power tool 100. In the second embodiment 302, the centering device 200 includes a collecting element 222. The collecting element is configured to collect at least lubricating material. Exemplarily, the collecting element 222 is formed from the anvil 270, wherein the collecting element 222 is exemplary formed as a blind hole with a centering hole.

[0067] Figure 5a A first perspective view of the drive cover 136 of the handheld machine tool 100 is shown, while Figure 5bA second perspective view of the drive cover 136 of the handheld machine tool 100 is shown. Figure 6 A partial longitudinal section of the handheld machine tool 100 is shown. At least one width 263 of the planet carrier flange 263 of the transmission 118 is less than or substantially equal to at least one width 265 of the planet gear 262 of the transmission 118. The planet carrier flange 261 is the flange of the planet carrier 260. Figure 7 A partial longitudinal section of a third embodiment 303 of the handheld machine tool 100 is shown. Here, the support element 430 is formed by a separate member 436, wherein the separate member is constructed in annular shape. The separate member 436 is axially arranged between the transmission cover 136 and the intermediate shaft 120 (in particular the planetary carrier 260, and more particularly the planetary carrier flange 261). Exemplarily, the transmission cover 136 includes a receiving portion 424 for the separate member. Exemplarily here, the hollow wheel 129, the transmission cover 136, and the impact mechanism cover 127 are integrally formed.

[0068] Figure 8a A partial longitudinal section 300 of a fourth embodiment 304 of a handheld machine tool 100 is shown. An intermediate shaft support element 360 is arranged between an intermediate shaft 120 and a transmission cover 136. Here, the intermediate shaft support element 360 is radially arranged between the intermediate shaft 120 and the transmission cover 136. Exemplarily, the intermediate shaft support element 360 is formed as a ball bearing. The intermediate shaft 120 includes a support receiving portion 362, which is exemplary formed as a surrounding flange. Planetary gears 262 are arranged axially, in particular, between the intermediate shaft support element 360 and the drive shaft bearing 180. The transmission cover 136 may include an intermediate shaft support receiving portion 248. The intermediate shaft support element 360 is radially arranged between the support receiving portion 362 and the intermediate shaft support receiving portion 248. The intermediate shaft 120 includes a sealing ring 350. The sealing ring 350 substantially seals a drive shaft 116 (not shown). The sealing ring 350 is radially arranged between the drive shaft 116 (not shown) and the intermediate shaft. A damping element 332 is provided and disposed between the transmission cover 136 and the hollow wheel 129. The damping element 332 is exemplary formed as an O-ring. The damping element 332 is configured to dampen possible vibrations. The hollow wheel 129 includes a tooth tip circle diameter 346. The transmission cover 136 can be at least partially guided by means of the tooth tip circle diameter 346.

[0069] Figure 8b The transmission cover 136 in the fourth embodiment 304 of the handheld machine tool 100 is shown. The transmission cover 136 abuts against the tooth tip circle diameter 346 with an outer diameter 245.

Claims

1. A handheld machine tool (100) comprising: a housing (110); a drive motor (114) having a drive shaft (116); and a transmission (118) drivable by means of the drive shaft (116), wherein, The transmission (118) has a transmission housing (119), a transmission cover (136), and a hollow wheel (129); an intermediate shaft (120) that can be driven by the transmission (118); a support device (400) for supporting the intermediate shaft (120); and a tool receiving part (150) for receiving an insert tool (150). The characteristic feature is that the transmission device (118) is configured to construct the support device (400).

2. The handheld machine tool (100) according to claim 1, characterized in that, The support device (400) has an axial support device (420) which is at least partially, especially axially constructed, between the intermediate shaft (120) and the transmission cover (136).

3. The handheld machine tool (100) according to claim 2, characterized in that, The axial support device (420) has at least one support element (430) configured in the circumferential direction relative to the drive shaft (116).

4. The handheld machine tool (100) according to claim 3, characterized in that, The support element (430) is arranged radially between the drive shaft (116) and the hollow wheel (129).

5. The handheld machine tool (100) according to any one of claims 3 or 4, characterized in that, The axial support device (420) has at least one support receiving part (422) configured to receive the support element (430).

6. The handheld machine tool (100) according to any one of claims 2 to 5, characterized in that, The axial support device (420) has at least one additional support element (432), wherein the support element (430) is radially arranged between the drive shaft (116) and the additional support element (432).

7. The handheld machine tool (100) according to any one of the preceding claims, characterized in that, The support device (400) has a radial support device (440) which is at least partially, especially radially, constructed between the intermediate shaft (120) and the hollow wheel (129).

8. The handheld machine tool (100) according to claim 7, characterized in that, At least one planetary gear (262) of the transmission (118) and the hollow gear (129) are configured to form the radial support device (440).

9. The handheld machine tool (100) according to any one of the preceding claims, characterized in that, At least one width (263) of the planet carrier flange (261) of the transmission (118) is less than or substantially equal to at least one width (265) of the planet gear (262) of the transmission (118).

10. The handheld machine tool (100) according to any one of the preceding claims, characterized in that, The opening (243) of the transmission cover (136) is smaller than or substantially equal to the opening (286) of the intermediate shaft (120).

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