hand tool

Abstract

A hand-held power tool (100) is disclosed, comprising a housing (110), a drive motor (114), an intermediate shaft (120), the intermediate shaft (120) being drivable by the drive motor (114), an impact mechanism (122) being drivable at least partially by the intermediate shaft (120), and a tool holder (150) for receiving an insert tool (140), the tool holder (150) being drivable by means of the impact mechanism (122). It is proposed that the hand-held power tool (100) has a sensor wheel arrangement (200) which can be driven at least partially by at least one bearing (158) of the tool holder (150).

Description

The present invention relates to a hand-held power tool according to the preamble of claim 1.Prior ArtDE 10 2017 200 988 A1 discloses a sensor wheel arrangement for determining an absolute angle position of an electric motor.Disclosure of the InventionThe present invention is based on a hand-held power tool having a housing, having a drive motor, having an intermediate shaft, the intermediate shaft being drivable by the drive motor, having a striking mechanism which is drivable at least partially by the intermediate shaft, and having a tool receptacle for receiving an insert tool, the tool receptacle being drivable by means of the striking mechanism. It is proposed that the hand-held power tool has a transmitter wheel arrangement which can be driven at least partially by at least one bearing of the tool holder.The invention provides a hand-held power tool in which a rotation angle of the tool holder per stroke of the striking mechanism can be determined. This increases a screwing-in accuracy.The hand-held power tool can be designed as an electrically operated hand-held power tool. The electrically operated hand-held power tool can be designed as a mains-operated or as a battery-operated hand-held power tool. For example, the hand-held power tool can be designed as a rotary impact wrench.The housing of the hand-held power tool is designed to at least partially accommodate the tool holder, the drive motor, the intermediate shaft and the striking mechanism. The housing can be designed as a shell housing with two half shells.The drive motor can be designed as an electrically commutated drive motor, in particular as at least one electric motor. The drive motor is designed in such a way that it can be actuated via a manual switch. If 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 manual switch is accordingly no longer actuated by the user, the drive motor is switched off. The drive motor is preferably electronically controllable and / or regulable in such a way that a reversing operation and a specification for a desired rotational speed can be realized. In the reversing mode, the drive motor can be switchable between a clockwise direction of rotation and a counterclockwise direction of rotation. To switch over the drive motor in the reversing mode, the hand-held power tool can have a rotation direction switching element, in particular a rotation direction switching device.The drive motor is designed to drive the intermediate shaft. For this purpose, the drive motor and the intermediate shaft are connected to one another. The intermediate shaft is arranged between the drive motor and the tool holder. The intermediate shaft can have a transmission unit. The transmission unit can be designed as at least one planetary gear, wherein it can be shifted, for example. The planetary gear can have at least one planetary stage. In a shiftable transmission, it is possible to switch between at least two gear stages by means of at least one gear switching element, in particular a gear change-over switch. The transmission unit can have a transmission cover. The transmission cover is designed to cover, in particular at least partially close, the transmission unit with respect to the drive motor. The transmission cover can be arranged between the planetary transmission, in particular the planetary stage, and the drive motor. The transmission unit, in particular the planetary transmission, can have a ring gear. Here, for example, the ring gear and the transmission cover can be integral.The striking mechanism is designed to be operated in a striking mode. During the percussion operation, the percussion mechanism generates high torque peaks in order to thereby release tightly seated connecting means or to fasten connecting means. The striking mechanism has a striking mechanism and a striking mechanism spring. The striking mechanism can be connected to the drive motor by means of the gear unit of the intermediate shaft. The striking mechanism can be designed, for example, as a rotary striking mechanism or a V-groove striking mechanism. The striking mechanism can be driven by the intermediate shaft. The striking mechanism can be arranged between the drive motor and the tool holder. The striking mechanism has a striking mechanism housing in which the striking mechanism and the striking mechanism spring are arranged. In addition, the striking mechanism has a striking mechanism cover. The striking mechanism cover can close the striking mechanism in the direction of the drive motor. The striking mechanism cover can be arranged between the drive motor and the tool holder, in particular the intermediate shaft, very particularly the transmission unit. It is possible for the striking mechanism cover and the transmission cover to be integral, so that the striking mechanism cover forms the ring gear.The striker and the striking mechanism spring can be arranged around the intermediate shaft in the circumferential direction. The striker can be mounted on the intermediate shaft by means of striking mechanism balls. In addition, the striking mechanism balls are designed to move the striking element at least partially, in particular axially, in the direction of the drive motor. The striker can be arranged in a position facing the tool holder or in a position facing the drive motor. In the position facing the tool holder, the striker can abut a rear end of the tool holder by means of at least one striking cam. Here, for example, two striking cams are provided, wherein more than two striking cams are also conceivable. In the position facing the drive motor, the striker can be arranged at a distance from the tool holder. The striking mechanism balls are designed to pull the striking mechanism open from a triggering torque, which can be applied to the tool holder, in that the striking mechanism balls move, in particular displace, the striking mechanism from the position facing the tool holder counter to a spring force of the striking mechanism spring into the position facing the drive motor. The performed spring force of the striking mechanism spring is stored as the performed clamping work. As soon as the striker reaches the position facing the drive motor, the striker can be guided back into the position facing the tool holder by means of the striking mechanism spring. In this case, the clamping work performed is released, as a result of which the club is guided into the position facing the tool holder. The club can perform a rotational movement and an axial movement.The drive motor has a drive shaft. The drive shaft is mounted in the housing by means of at least one drive shaft bearing. The drive motor can drive by means of the drive shaft, the intermediate shaft, the transmission unit, the striking mechanism and / or the tool holder. The drive shaft bearing can be designed, for example, as a ball bearing, a rolling bearing or a sliding bearing. The drive shaft bearing is arranged at an end of the drive motor facing the tool holder. The drive shaft can project into the intermediate shaft through the transmission unit. The drive shaft bearing can be arranged in the intermediate shaft, so that the drive shaft is mounted in the intermediate shaft by means of the drive shaft bearing. The drive shaft can have a further drive shaft bearing which is arranged on an end facing away from the drive motor. Thus, the drive shaft can then be rotatably mounted in the housing by means of the drive shaft bearing and the further drive shaft bearing. It is possible for the drive shaft to protrude into the transmission cover and / or to engage into the transmission cover. The hand-held power tool can have a tool axis. In this case, an axis of rotation of the drive shaft can form the tool axis. In particular, "axial" is to be understood to mean substantially parallel to the tool axis. Whereas, "radial" is to be understood to mean substantially perpendicular to the tool axis.The tool holder can be designed as an inner tool holder, such as a bit holder, for example, and / or as an outer tool holder, such as a nut holder, for example. It is also conceivable for the tool holder to be designed as a drill chuck. The tool holder can hold insert tools, such as, for example, helical bits or socket wrench, so that a user can produce screw connections from a fastening element to a fastening carrier.In addition, the hand-held power tool comprises an energy supply, wherein the energy supply is provided for battery operation by means of batteries, in particular hand-held power tool battery packs, and / or for grid operation. In a preferred embodiment, the energy supply is designed for battery operation. In the context of the present invention, a "hand-held power tool battery pack" is intended to mean a connection of at least one battery cell and one battery pack housing. The handheld power tool rechargeable battery pack is advantageously designed for supplying energy to commercially available battery-operated handheld power tools. The at least one battery cell can be designed, for example, as a Lilon battery cell having a rated voltage of 3.6 V. By way of example, the handheld power tool battery pack can comprise up to ten battery cells, wherein a different number of battery cells is also conceivable. An embodiment as a battery-operated hand-held power tool and also the operation as a mains-operated hand-held power tool are sufficiently known to the person skilled in the art, for which reason the details of the energy supply will not be discussed here.The hand-held power tool can have a control unit at least for controlling the drive motor. The control unit can be arranged in the housing, for example in a handle of the hand-held power tool or in a region of a power supply interface.The encoder wheel arrangement can be driven at least partially by the bearing of the tool holder. When the tool holder rotates, the bearing rotates at least partially. The bearing can then transmit this rotation at least partially to the encoder wheel arrangement. In this case, for example, a rotational angle of the encoder wheel arrangement, a rotational angle speed of the encoder wheel arrangement, a rotational angle acceleration of the encoder wheel arrangement and / or a multiple rotation of at least one component of the encoder wheel arrangement can be measured.In one embodiment of the hand-held power tool, the encoder wheel arrangement has at least one axis of rotation which is coaxial, in particular concentric, with respect to an axis of rotation of the tool holder. The tool axis can form the axis of rotation of the tool holder, so that these coincide. The axis of rotation of the encoder wheel arrangement and the axis of rotation of the tool holder can coincide.In one embodiment of the hand-held power tool, the encoder wheel arrangement has at least one encoder wheel which can be driven by the bearing. The encoder wheel can be driven by the tool holder. In this case, the encoder wheel can be embodied, for example, in the manner of a disk, ring or gearwheel. It is possible, for example, for the encoder wheel to be magnetic or magnetized. The encoder wheel can be designed as a toothed disk or perforated disk. In addition, the encoder wheel can be designed, for example, in the manner of a disk with a toothing on an outer periphery of the encoder wheel or as a disk with magnets arranged in the circumferential direction. The encoder wheel may have measurement features arranged circumferentially about the axis of rotation of the encoder wheel assembly.In one embodiment of the hand-held power tool, the bearing has a bearing inner ring which is operatively connected to the encoder wheel. The bearing has the bearing inner ring and a bearing outer ring. Rolling bodies are arranged radially between the bearing inner ring and the bearing outer ring. The bearing can be designed, for example, as a ball bearing or a bearing bearing. A plurality of bearings, such as two or three, may be provided. The bearing inner ring abuts the tool holder. The bearing outer ring can be accommodated in the striking mechanism housing. The bearing is provided for the purpose that the tool holder can rotate relative to the striking mechanism housing. The bearing inner ring is arranged radially, in particular to the tool axis, between the tool holder and the bearing outer ring. The bearing inner ring and the encoder wheel are connected to one another in a form-fitting and / or force-fitting manner. The encoder wheel may have a collar on an inner periphery. The collar of the encoder wheel can abut on the bearing inner ring. In this case, the encoder wheel can be connected to the at least one bearing in a form-fitting and / or force-fitting manner.In one embodiment of the hand-held power tool, the striking mechanism housing of the striking mechanism has a cutout for the encoder wheel. The recess for the encoder wheel can be formed coaxially to the tool receptacle in the striking mechanism housing. For example, the recess can be formed as an annular groove. The recess can be formed axially between the striking cams of the striking element or anvil cams of the tool holder and the bearing. The impact cams are configured to impact the anvil cams in the circumferential direction during the impact operation.In one embodiment of the hand-held power tool, the encoder wheel arrangement has at least one sensor element which is designed to detect at least one change in the encoder wheel. The sensor element can be designed as a sensor for measuring AMR, GMR, CMR, TMR, EMR or optical, inductive, capacitive or resistive angle measurement. The sensor element is designed to detect a change, such as a rotation or a magnetic field change. It is conceivable for the sensor element to be of modular design, such that it can also be separated from the hand-held power tool, for example as a type of adapter or attachment. The encoder wheel can be arranged axially to the tool axis between the beater and the sensor element. The sensor element can be substantially parallel to the axis of rotation of the tool holder and the axis of rotation of the encoder wheel.In one embodiment of the hand-held power tool, the striking mechanism housing of the striking mechanism has a sensor receptacle which is designed to receive the sensor element. The striking mechanism housing can form the sensor receptacle, so that these are integral. The sensor element can be arranged substantially within the sensor receptacle. The sensor receptacle can be designed, for example, in the manner of a pot, a shell, a cap, a recess or a shaft. The bearing of the tool holder can be arranged radially between the tool holder and the sensor holder.In one embodiment of the hand-held power tool, the hand-held power tool has a cover element which is arranged axially between the striking element of the striking mechanism and the bearing. The cover element can be designed, for example, as a cover disk, disk-like or washer-like. The cover element can be formed and / or arranged coaxially with respect to the tool axis. The cover element can be arranged between the racket, in particular the striking cam, and the encoder wheel.In one embodiment of the hand-held power tool, the cover element is designed to at least partially protect the transmitter arrangement from impacts of the club. The cover element is arranged in such a way that axial impacts of the striker during the impact operation are prevented by the cover element. In addition, the cover element also protects the sensor element from dirt.In one embodiment of the hand-held power tool, the striking mechanism housing of the striker has a receptacle for the cover element, which is formed at least partially axially, in particular with respect to the tool axis, between the cover element and the encoder wheel arrangement. The cover element can abut against the receptacle for the cover element. The receptacle for the cover element can be formed in the striking mechanism housing in the circumferential direction. The receptacle for the cover element can be designed, for example, as a crown groove. The cover element can have an opening for the output shaft and / or the tool holder.Brief Description of the DrawingsThe invention is explained below with reference to a preferred embodiment. The drawings show: FIG. 1 shows a schematic view of a hand-held power tool according to the invention; FIG. 2 shows a detail of a longitudinal section of the hand-held power tool; FIG. 3 shows three embodiments of a sensor wheel;DESCRIPTION OF THE EMBODIMENTFIG. 1 shows a hand-held power tool 100 according to the invention, wherein it is designed here as an exemplary battery-operated rotary impact wrench. The hand-held power tool 100 comprises an output shaft 124, a tool holder 150 and a striking mechanism 122, for example a rotary or rotary striking mechanism. The hand-held power tool 100 has a housing 110 with a handle 126. The hand-held power tool 100 can be connected mechanically and electrically to a power supply for battery operation to form a power supply independent of the grid, so that the hand-held power tool 100 is designed as a battery-operated hand-held power tool 100. A handheld power tool rechargeable battery pack 130 is used here as the energy supply. However, the present invention is not limited to battery-operated hand-held power tools, but can also be used in grid-dependent, i.e. grid-operated, hand-held power tools.The housing 110 comprises a drive unit 111 and the striking mechanism 122, wherein the drive unit 111 and the striking mechanism 122 are arranged in the housing 110. The drive unit 111 comprises an electrically commutated drive motor 114, which is supplied with current by the handheld power tool rechargeable battery pack 130, and a transmission unit 118. The transmission unit 118 is designed as at least one planetary gear. The drive motor 114 is designed such that it can be actuated, for example, via a manual switch 128, with the result that the drive motor 114 can be switched on and off. The drive motor 114 can advantageously be controlled and / or regulated electronically, so that a reversing operation, as well as a desired rotational speed, can be realized. For the reversing operation, the hand-held power tool 100 has a rotation direction switching element 121, which is designed as a rotation direction switcher. The rotation direction switching member 121 is configured to switch the drive motor 114 between a clockwise rotation direction and a counterclockwise rotation direction. The structure and the mode of operation of a suitable drive motor are sufficiently known to the person skilled in the art, for which reason they will not be discussed in more detail here.The gear unit 118 is connected to the drive motor 114 via a drive shaft 116. The drive shaft 116 is mounted in the housing 110 by means of a motor-side bearing, not shown in detail. The transmission unit 118 is provided to convert a rotation of the drive shaft 116 into a rotation between the transmission unit 118 and the striking mechanism 122 via an intermediate shaft 120. Preferably, this conversion is such that the intermediate shaft 120 rotates relative to the input shaft 116 at an increased torque but at a decreased rotational speed. The intermediate shaft 120 drives the striking mechanism 122 at least partially. The transmission unit 118 includes a transmission case 119 disposed in the housing 110. The hand-held power tool 100 comprises a tool axis 102, wherein here an axis of rotation of the drive shaft 116 forms the tool axis 102.The striking mechanism 122 is connected to the intermediate shaft 120 and comprises a striking element 300 and a striking-element spring 350, wherein the striking mechanism 122 generates abrupt rotational pulses with high intensity during a striking operation, see also FIG. 2. These abrupt rotational pulses are transmitted via the striking element 300 to the output shaft 124, for example a work spindle. The striking mechanism 122 comprises a striking mechanism housing 123, wherein the striking mechanism 122 can also be arranged in another suitable housing, such as the transmission housing 119. The striking mechanism 122 is designed to drive the output shaft 124. A tool holder 150 is provided on the output shaft 124. The tool holder 150 is preferably formed and / or formed on the output shaft 124. The tool holder 150 is preferably arranged in an axial direction 132 facing away from the drive unit 111. The tool holder 150 is designed here as an internal hexagonal holder, in the manner of a bit holder, which is provided to receive an insert tool 140. The insert tool is shaped in the manner of a screwdriver bit with a polygonal outer coupling 142. The type of screwdriver bit, for example of the HEX type, is sufficiently known to the person skilled in the art. However, the present invention is not limited to the use of HEX screwdriver bits, but other tool holders that appear expedient to the skilled person can also be used, such as HEX drills, SDS quick inserts, nuts or round shank drill chucks. In addition, the structure and the mode of operation of a suitable bit holder are sufficiently known to the person skilled in the art.The hand-held power tool 100 has a control unit 170 at least for controlling the drive unit 111, in particular 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. In addition, the housing 110 includes a power supply holder 160. The energy supply holding device 160 accommodates the handheld power tool battery pack 130 and forms a stand 162 with a standing surface. The handheld power tool rechargeable battery pack 130 can be detached from the energy supply holding device 160 without tools. Further, the housing 110 includes the handle 126 and the power supply holder 160. The handle 126 may be grasped by the user. In one embodiment, the power supply holder 160 is disposed on the handle 126. The hand-held power tool 100 can be set down by means of the stand 162.The hand-held power tool 100 comprises a transmitter wheel arrangement 200. The encoder wheel arrangement 200 is designed to detect a rotation angle of the tool holder 150. The encoder wheel arrangement 200 can be driven at least partially by a bearing 158 of the tool holder 150, see also FIG. 2. As soon as the tool holder 150 rotates, the bearing 158 rotates at least partially. The bearing 158 is designed to transmit this rotation at least partially to the encoder wheel arrangement 200. Two bearings 158 are formed here by way of example.FIG. 2 shows a detail 500 of a longitudinal section of the hand-held power tool 100. The drive shaft 116 is not shown here, wherein this is mounted in the intermediate shaft 120 by means of a drive shaft bearing 117. The drive shaft bearing 117 is formed here as a needle bearing, for example. The striking mechanism 122 is formed here as a V-groove striking mechanism. A striker 300 and a striking mechanism spring 350 are arranged in the striking mechanism housing 123. The striker 300 is mounted on the intermediate shaft 120 by means of striking mechanism balls 310. The striking mechanism balls 310 are provided to move the striking mechanism 300 at least partially in the direction of the drive motor 114. The striking mechanism spring 350 is arranged around the intermediate shaft 120 in the circumferential direction and encloses the latter accordingly in the circumferential direction with respect to the tool axis 102. The club 300 includes striking cams 312. The impact cams 312 are designed to abut on the output shaft 124 and drive it.The encoder wheel assembly 200 includes a rotational axis 202. The axis of rotation 202 of the encoder wheel arrangement 200 is coaxial, in particular concentric, to an axis of rotation 103 of the tool holder 150. By way of example, the tool axis 102, the rotational axis 103 of the tool holder 150 and the rotational axis 202 of the encoder wheel arrangement 200 coincide. The encoder wheel assembly 200 includes an encoder wheel 220. The bearing 158 is configured to drive the encoder wheel 220. The encoder wheel 220 is thereby driven by the tool holder 150. The encoder wheel 220 is shaped, for example, in the manner of a perforated disk 222, see also FIG. 3.The bearing 158 includes a bearing inner ring 280, a bearing outer ring 284, and rolling elements 286. The rolling bodies 286 are each arranged radially between the bearing inner ring 280 and the bearing outer ring 284. The bearing inner ring 280 of one of the bearings 158 is operatively connected to the encoder wheel 220. By way of example, the bearings 158 are formed as ball bearings. The rolling bodies 286 are thus shaped as balls. The bearing inner ring 280 of the bearings 158 abuts the tool holder 150 in each case. The bearing outer ring 284 is in each case accommodated in the striking mechanism housing 123. The bearings 158 are designed so that the tool holder 150 rotates with a higher rotational accuracy relative to the striking mechanism housing 123. One of the bearing inner rings 280 and the encoder wheel 220 are connected to one another in a form-fitting and / or force-fitting manner. The encoder wheel 220 comprises a collar 221 which is formed on an inner periphery 223 of the encoder wheel 220, see also FIG. 3.The striking mechanism housing 123 comprises a recess 260 for the encoder wheel 220. The recess 260 for the encoder wheel 220 is formed coaxially with the tool receptacle 150 in the striking mechanism housing 123 and, for example, as an annular groove. The recess 260 is formed axially between the striker cams 312 and one of the bearings 158. The encoder wheel arrangement 200 comprises a sensor element 230. Sensor element 230 is provided to detect at least one change in encoder wheel 220. The encoder wheel 220 is arranged axially to the tool axis 102 between the striker 300 and the sensor element 230. Sensor element 230 is essentially parallel to rotational axis 103 of tool holder 150 and rotational axis 202 of encoder wheel 220. The striking mechanism housing 123 comprises a sensor receptacle 262. The sensor receptacle 262 is provided to receive the sensor element 230. The striking mechanism housing 123 forms the sensor receptacle 262 and the sensor element 230 is arranged substantially within the sensor receptacle 262. By way of example, the sensor receptacle 262 is shaped in the manner of a cap.The hand-held power tool 100 comprises a cover element 270. The cover element 270 is arranged axially between the striker 300 and the bearing 158. The cover element 270 is formed, for example, as a cover disk and coaxial to the tool axis 102. The cover element 270 is arranged axially between the striker 300, in particular the striking cam 312, and the encoder wheel 220. The cover element 270 is designed to at least partially protect the transmitter arrangement 200 from impacts of the club 300. The striking mechanism housing 123 comprises a receptacle 264 for the cover element 270. The receptacle 264 for the cover element 270 is formed at least partially axially, in particular with respect to the tool axis 102, between the cover element 270 and the encoder wheel arrangement 200. The cover element 270 at least partially abuts the receptacle 264 for the cover element 270 and is formed in the striking mechanism housing 123 in the circumferential direction. By way of example, the receptacle 264 for the cover element 270 is formed as a crown groove. The cover element 270 comprises an opening 272 for the output shaft 124 and / or the tool holder 150.FIG. 3 illustrates three embodiments of the encoder wheel 220 formed as the orifice plate 222. FIG. 3 ashows a first embodiment 224 of the encoder wheel 220 configured as the perforated disk 222. The first embodiment 224 has a toothed rim 225 on an outer periphery of the encoder wheel 220, which rim comprises a coarse toothing 227. The coarse toothing 227 is characterized by a greater spacing of individual teeth and a greater tooth height. In the first embodiment 224, the orifice plate 222 is magnetized. FIG. 3 bshows a second embodiment 226 of the encoder wheel 220 configured as the perforated disk 222. The second embodiment 226 comprises, on the outer periphery of the encoder wheel 220, the toothed rim 225 which has a fine toothing 229. The free toothing 229 is characterized by a smaller spacing of individual teeth and a lower tooth height. In the second embodiment 226, the orifice plate 222 is magnetized. FIG. 3 shows a third embodiment 228 of the encoder wheel 220 configured as the perforated disk 222. The third embodiment 228 has magnets 240 arranged in the circumferential direction, in particular magnetic plates.References included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedDE 10 2017 200 988 A1

[0002]

Claims

Hand-held power tool (100) having a housing (110), having a drive motor (114), having an intermediate shaft (120), the intermediate shaft (120) being drivable by the drive motor (114), having a striking mechanism (122) which is drivable at least partially by the intermediate shaft (120), and having a tool receptacle (150) for receiving an insert tool (140), the tool receptacle (150) being drivable by means of the striking mechanism (122), characterized bya master wheel arrangement (200) which is drivable at least partially by at least one bearing (158) of the tool receptacle (150).Hand-held power tool (100) according to Claim 1, characterized in that the encoder wheel arrangement (200) has at least one axis of rotation (202) which is coaxial with an axis of rotation (103) of the tool holder (150).Hand-held power tool (100) according to Claim 1 or 2, characterized in that the encoder wheel arrangement (200) has at least one encoder wheel (220) which can be driven by the bearing (158).Hand-held power tool (100) according to Claim 3, characterized in that the bearing (158) has a bearing inner ring (280), which is operatively connected to the encoder wheel (220).Portable power tool (100) according to Claim 3 or 4, characterized in that a striking-mechanism housing (123) of the striking mechanism (122) has a cutout (260) for the encoder wheel (220).Hand-held power tool (100) according to one of Claims 3 to 5, characterized in that the encoder wheel arrangement (200) has at least one sensor element (230) which is designed to detect at least one change in the encoder wheel (220).Hand-held power tool (100) according to Claim 6, characterized in that a striking-mechanism housing (123) of the striking mechanism (122) has a sensor receptacle (262), which is designed to receive the sensor element (230).Hand-held power tool (100) according to one of the preceding claims, characterized bya cover element (270) which is arranged axially between a striker (300) of the striking mechanism (122) and the bearing (158).Hand-held power tool (100) according to Claim 8, characterized in that the cover element (270) is designed to at least partially protect the transmitter arrangement (200) from impacts of the striker (300).Hand-held power tool (100) according to Claim 8 or 9, characterized in that a striking mechanism housing (123) of the striking element (300) has a receptacle (264) for the cover element (270), which receptacle is formed at least partially axially between the cover element (270) and the encoder wheel arrangement (200).

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