Hand-held power tool

Abstract

The invention relates to a hand-held power tool (100) having a housing (110), a drive motor (114), an intermediate shaft (120), wherein the intermediate shaft (120) can be driven by the drive motor (114), having a percussion mechanism (122) having a percussion element (300) and a radial spring system (350) coupled to the percussion element (300) in a torque-proof manner, wherein the percussion mechanism (122) can be driven at least partially by the intermediate shaft (120), and having a tool receptacle (150) for receiving a plug-in tool (140), wherein the tool receptacle (150) can be driven by means of the percussion mechanism (122), in particular the percussion element (300) and / or the intermediate shaft (120), wherein the intermediate shaft (120) has at least one bearing (200), against which the radial spring system (350) bears. It is proposed that the hand-held power tool (100) has a rotary driver (500) which is configured to couple at least the percussion element (300) to the bearing (200).

Description

Technical Field

[0001] The present invention relates to a handheld machine tool as described in the preamble of claim 1. Background Technology

[0002] According to CN 212330861 U, an impact screwdriver is known, which has a drive motor for driving a drive shaft, an output shaft that can be coupled to a tool receiving part, and an impact mechanism. Summary of the Invention

[0003] This invention relates to a handheld power tool having a housing, a drive motor, and an intermediate shaft, wherein the intermediate shaft is drivable by the drive motor. The handheld power tool also has an impact mechanism comprising an impactor and a radial spring system anti-torsionally connected to the impactor, wherein the impact mechanism is at least partially drivable by the intermediate shaft. The handheld power tool further has a tool receiving section for receiving insert tools, wherein the tool receiving section is drivable by means of the impact mechanism, particularly the impactor, and / or the intermediate shaft, wherein the intermediate shaft has at least one bearing against which the radial spring system rests. The invention proposes that the handheld power tool have a rotating carrier configured to couple at least the impactor to the bearing.

[0004] This invention provides a handheld machine tool including an impact mechanism with a higher mass moment of inertia, wherein the radial spring system is torsionally connected to the impactor, such that the radial spring system is an additional impactor mass. CN 212330861 U lacks a rotating actuator for synchronizing the radial spring system with the impactor.

[0005] The handheld machine tool can be configured as an electrically powered handheld machine tool. Here, the electrically powered handheld machine tool can be configured as either grid-connected or battery-powered. For example, the handheld machine tool can be configured as a rotary impact screwdriver.

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

[0007] The drive motor can be configured as an electronically commutated drive motor, particularly at least one electric motor. The drive motor is configured to be operable via 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 no longer operated by the user, the drive motor is turned off. Preferably, the drive motor is electronically controllable and / or adjustable, enabling reverse operation and pre-setting of a desired speed. In reverse operation, the drive motor can switch between right-hand and left-hand rotational directions. To switch the drive motor in reverse operation, the handheld machine tool can have a rotational direction switching element, particularly a rotational direction switching switch.

[0008] The drive motor is configured to drive the intermediate shaft. For this purpose, the drive motor and the intermediate shaft are interconnected. The intermediate shaft is arranged between the drive motor and the tool receiving unit. The intermediate shaft may have a transmission unit. The transmission unit may be configured as at least one planetary gear transmission, wherein the planetary gear transmission may be, for example, switchable. The planetary gear transmission may have at least one planetary gear group. In a switchable transmission, switching between at least two gear levels can be performed by means of at least one gear shifting element, in particular a gear shifting switch. The transmission unit may have a transmission cover. The transmission cover is configured to cover, in particular at least partially close, the transmission unit relative to the drive motor. The transmission cover may be arranged between the planetary gear transmission, in particular the planetary gear group, and the drive motor. The transmission unit, in particular the planetary gear transmission, may have a hollow wheel. Here, the hollow wheel and the transmission cover may, for example, be integral.

[0009] The impact mechanism is configured to operate during impact operation. During impact operation, the impact mechanism generates a high torque peak to loosen or fasten fixed connecting devices. The impact mechanism has an impactor and a radial spring system to which the impactor is torsionally connected. The impact mechanism can be connected to the drive motor via a transmission unit of the intermediate shaft. The impact mechanism can be configured, for example, as a rotary impact mechanism or a V-groove impact mechanism. The impact mechanism can be driven by the intermediate shaft. The impact mechanism can be arranged between the drive motor and the tool receiving unit. The impact mechanism has an impact mechanism housing in which the impactor and the radial spring system are arranged. Furthermore, the impact mechanism has an impact mechanism cover. The impact mechanism cover can close the impact mechanism in the direction toward the drive motor. The impact mechanism cover can be arranged between the drive motor and the tool receiving unit, particularly the intermediate shaft, and especially the transmission unit. Alternatively, the impact mechanism cover and the transmission cover can be integral, such that the impact mechanism cover forms the hollow wheel.

[0010] The impactor and the radial spring system can be arranged circumferentially about the intermediate shaft. The impactor can be supported on the intermediate shaft by means of an impact mechanism ball. Furthermore, the impact mechanism ball is configured to allow the impactor to move at least partially, particularly axially, toward the drive motor. The impactor can be arranged in a position facing the tool receiver or in a position facing the drive motor. In the position facing the tool receiver, the impactor can abut against the rear end of the tool receiver by means of at least one impact protrusion. For example, two impact protrusions are provided, although more than two are also possible. In the position facing the drive motor, the impactor can be arranged spaced apart from the tool receiver. The impact mechanism ball is configured to tension the impact mechanism by moving the impactor against the spring force of the radial spring system, particularly translating it, from the position facing the tool receiver to the position facing the drive motor, starting from a trigger torque that can act on the tool receiver. The spring force caused by the radial spring system is stored in the radial spring system as tensioning work. Once the impactor reaches the position facing the drive motor, it can be guided back to the position facing the tool receiver by means of the radial spring system. Here, the tension work done by the radial spring system is released, thereby guiding the impactor to the position facing the tool receiver. Here, the impactor can perform rotational and axial movements.

[0011] The drive motor has a drive shaft. The drive shaft is supported in the housing by means of at least one drive shaft bearing. The drive motor can drive the intermediate shaft, the transmission unit, the impact mechanism, and / or the tool receiving unit by means of the drive shaft. The drive shaft bearing can be exemplarily constructed as a ball bearing, rolling bearing, or sliding bearing. The drive shaft bearing is arranged on the end of the drive motor facing the tool receiving unit. The drive shaft can extend into the intermediate shaft through the transmission unit. 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. The drive shaft can have another drive shaft bearing arranged on the end opposite to the drive motor. Thus, the drive shaft can then be rotatably supported in the housing by means of the drive shaft bearing and the other drive shaft bearing. Alternatively, the drive shaft can extend into and / or engage with the transmission cover. The handheld machine tool can have a tool axis. Here, the axis of rotation of the drive shaft can constitute the tool axis. In particular, "axial" should be understood as substantially parallel to the tool axis. "Radial" should be understood as being substantially perpendicular to the tool axis.

[0012] The radial spring system is a spring system having spring elements arranged radially offset from the tool axis and / or in the circumferential direction about the tool axis. The radial spring system includes multiple spring elements. Exemplarily, there may be two, three, four, or more than four, for example, eight spring elements. The multiple spring elements may be arranged in the circumferential direction about the tool axis. The impactor has at least one receiving portion for the radial spring system. The number of receiving portions for the radial spring system may correspond to the number of spring elements. The receiving portion for the radial spring system may be canister-shaped, shell-shaped, or cylindrical. It is conceivable that the receiving portion for the radial spring system may be pin-shaped, needle-shaped, or strip-shaped, wherein other shapes are also conceivable. Combinations of receiving portions for the radial spring system are also possible, such as canister-shaped receiving portions with pins, so that at least one of the spring elements can be guided in the circumferential direction of the spring element and substantially within the spring element. A tab may be formed between each pair of adjacent spring elements, which increases the impactor mass to increase the impactor's moment of inertia. The spring element may be configured as, for example, a helical spring, a barrel spring, a conical spring, a conical helical spring, an irregularly shaped spring, or a combination thereof.

[0013] The radial spring system is torsionally connected to the impactor, causing the radial spring system to rotate together with the impactor. The radial spring system can be form-locked, force-locked, and / or material-locked connected to the impactor. Here, the spring element can be received via a receiving portion for the spring element of the radial spring system and, for example, inserted, pressed, press-fitted, or glued. If the receiving portion is canister-shaped, the corresponding spring element can be inserted. If the receiving portion is pin-shaped, the corresponding spring element can be inserted. Both possibilities increase the impactor's moment of inertia because the impactor's mass is higher than that of a single helical spring.

[0014] The tool receiver can be configured as an internal tool receiver, such as a bit receiver, and / or as an external tool receiver, such as a socket receiver. Alternatively, the tool receiver can be configured as a drill chuck. The tool receiver can receive insert tools, such as screwdriver bits or socket wrenches, allowing the user to establish a threaded connection between the fastening element and the fastening carrier.

[0015] Furthermore, the handheld power tool includes a power supply, wherein the power supply is configured for battery operation by means of a battery, particularly a handheld power tool battery pack, and / or for grid operation. In a preferred embodiment, the power supply is configured for battery operation. Within the framework of this invention, "handheld power tool battery pack" should be understood as a combination of at least one battery cell and a battery pack housing. The handheld power tool battery pack is advantageously configured to power commercially available handheld power tools that operate on batteries. The at least one battery cell can, for example, be configured as a lithium-ion battery cell with a nominal voltage of 3.6V. Exemplarily, the handheld power tool battery pack may include up to ten battery cells, wherein other numbers of battery cells may also be considered. The implementation of handheld power tools as battery-operated and as grid-operated handheld power tools are well known to those skilled in the art, and therefore the details of the power supply are not discussed here.

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

[0017] The bearing of the intermediate shaft enables the radial spring system to be rotatably arranged relative to the intermediate shaft within the impact mechanism housing. The radial spring system is torsionalally connected to the impactor and simultaneously rotatable relative to the intermediate shaft. The bearing of the intermediate shaft can be exemplarily constructed as a needle roller bearing, roller bearing, rolling bearing, sliding bearing, or ball bearing. The radial spring system rests against the bearing. "Rests" here should be understood as being in direct and immediate contact. Therefore, the bearing of the intermediate shaft has direct and immediate contact with the bearing, and in particular with at least one element of the bearing. The radial spring system rests against the bearing of the intermediate shaft such that when the radial spring system rotates, the bearing of the intermediate shaft also rotates at least partially. Thus, the impact mechanism spring can be rotated relative to the intermediate shaft by means of the bearing.

[0018] The rotating actuator is constructed such that the radial spring system rotates together with the impactor as the impactor rotates. The rotating actuator can be configured to extend at least partially into the impactor, at least during impact operation. At least during impact operation, the rotating actuator is engaged and coupled to the impactor. The rotating actuator can be substantially arranged within the impact mechanism, particularly within the impact mechanism housing. Multiple rotating actuators can be provided, for example, two or three. The rotating actuator can extend axially within the impact mechanism relative to the tool axis. For example, the rotating actuator can be constructed as a pin, tab, edge, protrusion, or bolt. Exemplarily, the rotating actuator can also be formed as a thread, hollow wheel, or crown gear.

[0019] In one embodiment of the handheld machine tool, a rotary actuator is arranged radially (particularly relative to the tool axis) between the intermediate shaft and the impact mechanism housing. The rotary actuator may be arranged axially between the planetary gear drive and the driven shaft. The rotary actuator may extend axially along the tool axis. Alternatively, the rotary actuator may extend at least partially in the circumferential direction around the tool axis.

[0020] In one embodiment of the handheld machine tool, the intermediate shaft has at least one planetary carrier, wherein the bearing is arranged between the radial spring system and the planetary carrier. The intermediate shaft is part of the planetary gear transmission. The planetary gear transmission has planetary gears and at least one planetary carrier. The at least one planetary carrier rotatably supports the planetary gears relative to the intermediate shaft. The bearing is axially arranged between the at least one planetary carrier and the radial spring system.

[0021] In one embodiment of a handheld machine tool, the radial spring system rests against a bearing washer of the bearing. The radial spring system rests directly and immediately against the bearing washer. The bearing washer is arranged toward the tool receiving portion. The bearing washer is configured to allow a rotational speed different from that of the intermediate shaft for the element resting against it. The bearing washer can be configured as a gasket or a ring. The bearing has rolling elements, which can be configured as balls, needle rollers, or cylindrical rollers, for example. The bearing washer is axially arranged between the rolling elements and the radial spring system. The bearing washer can be configured substantially disc-shaped or annular. Furthermore, the bearing washer can be substantially flat, depending on the rolling elements. If the rolling elements are configured as balls, the bearing washer can have a shell-like receiving portion for the balls. If the rolling elements are configured as cylindrical rollers or needle rollers, the bearing washer can be configured flat, respectively.

[0022] Alternatively, the radial spring system can be partially abutted against the bearing washer. Here, a first number of spring elements may abut against the bearing washer, while a second number of spring elements are spaced apart from the bearing washer. The second number of spring elements abut from a definable tension point during impactor tensioning. Thus, two radial spring systems can be implemented.

[0023] In one embodiment of the handheld machine tool, the planetary carrier is at least partially configured as a bearing cover. The planetary carrier and the bearing cover may be integral. The bearing cover is arranged toward the drive motor. The bearing cover may be arranged opposite to the bearing washer. The bearing cover is at least configured to support the rolling elements. The bearing cover may have a receiving portion depending on the rolling element, for example, a shell-like receiving portion in the case of a ball, and a flat receiving portion in the case of a roller or needle roller. The bearing washer and the bearing cover together with the rolling elements constitute the bearing.

[0024] In one embodiment, the bearing, particularly the bearing washer, has at least one retaining element configured to retain the rolling elements of the bearing. The retaining element is configured to radially retain the rolling elements. The configuration of the retaining element depends on the construction of the bearing, particularly the bearing washer, the rolling elements, and the bearing cover. The retaining element can be arranged, particularly radially, between the tool axis and the rolling elements. Here, the retaining element prevents the rolling elements from falling radially toward the tool axis. The retaining element can be constructed as a step, edge, protrusion, tab, flange, or shoulder. Alternatively, the bearing, particularly the bearing washer, can form the retaining element. Thus, the bearing washer and the retaining element are integral.

[0025] In one embodiment, the intermediate shaft, particularly the bearing cover, has radial stops on its outer periphery for the rolling elements of the bearing. These radial stops can be arranged radially upwards, particularly relative to the tool axis, opposite to the retaining element of the bearing washer. The radial stops are configured to radially retain the rolling elements of the bearing. Here, the radial stops constitute the radial boundary for the rolling elements of the bearing. The radial stops can be formed at least partially in the circumferential direction around the tool axis. Furthermore, the radial stops can extend at least partially axially. The radial stops can be constructed as edges, protrusions, tabs, etc. The radial stops can be form-locked, force-locked, and / or material-locked to the intermediate shaft, particularly the bearing cover. Alternatively, the intermediate shaft, particularly the bearing cover, can form the radial stops so that they are integral. The rolling elements can be arranged radially upwards, particularly relative to the tool axis, between the retaining element and the radial stops.

[0026] The impactor may have a contact element on its inner periphery. The contact element can be received by the journal of the intermediate shaft. The contact element can slide on the journal of the intermediate shaft.

[0027] In one embodiment of a handheld machine tool, the impactor has at least one guide element configured to receive a rotating drive member. The impactor can form the guide element so that they are integral. Alternatively, the guide element and the impactor can be two-piece components, connected to each other in a form-locking, force-locking, and / or material-locking manner. The guide element of the impactor can be arranged circumferentially along the tool axis. Furthermore, the guide element of the impactor can extend axially, particularly axially relative to the tool axis. The guide element of the impactor can be constructed as a slot, notch, or as a guide rail, tab, or gear. The guide element of the impactor can at least partially surround the rotating drive member, allowing the bearing to rotate the radial spring system at the same rotational speed as the impactor via the rotating drive member. At least during impact operation, the rotating drive member can abut against the guide element of the impactor. The guide element can have two abutment tabs configured to move the rotating drive member together with the impactor in the circumferential direction. It is conceivable to provide multiple guide elements for the impactor. Here, the number of guide elements for the impactor corresponds to the number of rotating drive members.

[0028] In one embodiment, the abutment element of the impactor extends into the inner circumference of the retaining element of the bearing, particularly the bearing washer, during impact operation. At the end stop of the impactor, the abutment element is radially arranged between the intermediate shaft, particularly the journal of the intermediate shaft, and the retaining element.

[0029] In one embodiment of a handheld machine tool, the impactor has at least one rotary receiving portion configured, at least during impact operation, to receive a rotary carrier. The impactor can form the rotary receiving portion as a single unit. The rotary receiving portion can be constructed, for example, in a canister, trough, or shell shape. In a first position of the impactor, the rotary carrier can be substantially disposed outside the rotary receiving portion. In a second position of the impactor, the rotary carrier can extend into the rotary receiving portion. Here, the rotary receiving portion can receive the rotary carrier substantially. The guide elements of the rotary receiving portion and the impactor can be arranged axially and / or circumferentially relative to each other along the tool axis. The guide elements of the rotary receiving portion and the impactor can be arranged substantially coaxially with the tool axis within the impact mechanism housing. The impactor can constitute not only the guide element of the impactor but also the rotary carrier, making them integral.

[0030] In one embodiment of the handheld machine tool, the bearing constitutes a rotating actuator. In particular, the bearing washer can constitute a rotating actuator. Thus, the bearing, and especially the bearing washer, and the rotating actuator can be integrated into one unit.

[0031] In one embodiment, the retaining element and the rotating actuator for the rolling elements of the bearing are integrated. Furthermore, the bearing washers and the rotating actuator can be arranged at an angle to each other, and particularly substantially perpendicularly.

[0032] In an alternative embodiment, the impactor constitutes a rotating actuator, and the bearing constitutes a rotating receiver. In this alternative embodiment, the rotating actuator of the impactor and the rotating receiver of the bearing are configured to work together.

[0033] In one embodiment of a handheld machine tool, a rotary actuator is arranged between two spring elements of a radial spring system. The radial spring system has multiple spring elements arranged circumferentially along the tool axis. The rotary actuator can be arranged between two spring elements in the circumferential direction along the tool axis.

[0034] In one embodiment of the handheld machine tool, two rotating actuators are arranged opposite each other (particularly relative to the tool axis) within the impact mechanism. Here, the two rotating actuators can be of the same type, such as two pins, two tabs, or two bolts. These two rotating actuators are substantially arranged within the impact mechanism housing. Furthermore, the journal of the intermediate shaft can be arranged radially between the two rotating actuators. Attached Figure Description

[0035] The invention is now described with reference to a preferred embodiment. The accompanying drawings are shown below: Figure 1 : A schematic view of a handheld machine tool according to the present invention; Figure 2a A partial longitudinal section of the impact mechanism of a handheld machine tool in its first working state; Figure 2b : A partial longitudinal section of the impact mechanism in the second working state; Figure 3 A partial view of another longitudinal section of an impact mechanism having a rotating actuator according to the invention; Figure 4 : A partial view of the three-dimensional longitudinal section of an impact mechanism with a rotating drive component; Figure 5a A three-dimensional view of the impactor; Figure 5b A perspective view of a bearing washer with a rotating actuator; Figure 6 A partial longitudinal section of an impact mechanism having an alternative embodiment of a rotating actuator. Detailed Implementation

[0036] Figure 1 A handheld power tool 100 according to the present invention is shown, wherein the handheld power tool is configured herein as an exemplary battery-powered rotary impact screwdriver. The handheld power tool 100 includes an output shaft 124, a tool receiving portion 150, and an impact mechanism 122, such as a rotating or rotary impact mechanism. The handheld power tool 100 includes a housing 110 having a handle 126. The handheld power tool 100 is configured as a battery-powered handheld power tool 100 so that it can be connected to a power source and ground for battery operation without relying on mains power. Here, the handheld power tool battery pack 130 serves as the power source. However, the present invention is not limited to battery-powered handheld power tools, but can also be applied to grid-dependent, i.e., grid-operated handheld power tools.

[0037] The housing 110 includes a drive unit 111 and an impact mechanism 122, both arranged within the housing 110. The drive unit 111 includes an electronically commutated drive motor 114 powered by a handheld power tool battery pack 130 and a transmission unit 118. The transmission unit 118 is configured as at least one planetary gear transmission 166, also see FIG. 2. 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 is electronically controllable and / or adjustable, enabling reverse operation and desired speeds. For reverse operation, the handheld power 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 suitable drive motors are well known to those skilled in the art and will not be described further here.

[0038] The transmission unit 118 is connected to the drive motor 114 via a drive shaft 116. The drive shaft 116 is supported in the housing 110 by means of a motor-side bearing (not shown in detail). The transmission unit 118 is configured to convert the rotation of the drive shaft 116 into rotation transmitted between the transmission unit 118 and the impact mechanism 122 via an intermediate shaft 120. This conversion is preferably performed such that the intermediate shaft 120 rotates relative to the drive shaft 116 with an increased torque but a decreased speed, see also FIG. 2. The intermediate shaft 120 at least partially drives the impact mechanism 122. The transmission unit 118 has a transmission housing 119 arranged in the housing 110. The handheld machine tool 100 includes a tool axis 102, wherein the axis of rotation of the drive shaft 116 forms the tool axis 102.

[0039] Impact mechanism 122 is connected to intermediate shaft 120 and includes impactor 300 and at least one radial spring system 350 torsionally connected to impactor 300, wherein impact mechanism 122 generates high-intensity impact-type rotary pulses during impact operation, see also FIG2. Intermediate shaft 120 includes bearing 200, see also FIG2. Radial spring system 350 rotatably rests against bearing 200. These impact-type rotary pulses are transmitted to output shaft 124, such as a work spindle, via impactor 300. Impact mechanism 122 includes impact mechanism housing 123, wherein impact mechanism 122 may also be arranged in other suitable housings, such as transmission housing 119. Impact mechanism 122 is configured to drive output shaft 124. Tool receiver 150 is provided on output shaft 124. Preferably, tool receiver 150 is formed and / or constructed on output shaft 124. Preferably, tool receiver 150 is arranged in an axial direction 132 away from drive unit 111. The tool receiver 150 is configured as an internal hexagonal receiver, according to the type of bit holder, and is configured to receive the insert tool 140. The insert tool is configured as a screwdriver bit, having a polygonal external coupling 142. The type of screwdriver bit, such as 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 are deemed meaningful by those skilled in the art can also be used, such as HEX drill bits, SDS-Quick insert tools, or round shank drill chucks. Furthermore, the structure and operation of suitable bit holders are well known to those skilled in the art.

[0040] The handheld power tool 100 includes a rotary actuator 500. The rotary actuator 500 is configured to couple at least the impactor 300 to the bearing 200, see also... Figures 3 to 6 The rotary actuator 500 is configured to cause the radial spring system 350 to rotate together with the impactor 300 when the impactor 300 rotates. During impact operation, the rotary actuator 500 extends at least partially into the impactor. Furthermore, the rotary actuator 500 is coupled to the impactor 300 during impact operation. The rotary actuator 500 is substantially arranged within the impact mechanism 122, and particularly within the impact mechanism housing 123. The rotary actuator 500 extends axially within the impact mechanism 122 relative to the tool axis 102.

[0041] 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). Furthermore, the housing 110 includes a power retention device 160. The power retention device 160 receives the handheld power tool battery pack 130 and forms a standing foot 162 thereon with a standing surface. The handheld power tool battery pack 130 can be removed from the power retention device 160 without tools. Additionally, the housing 110 has a handle 126 and the power retention device 160. The handle 126 can be gripped by a user. In one embodiment, the power retention device 160 is arranged on the handle 126. The handheld power tool 100 can be placed using the standing foot 162.

[0042] Figure 2a The image shows a longitudinal section 400 of the impact mechanism 122 of the handheld power tool 100 in a first operating state 402. In the first operating state 402, the impactor 300 is arranged toward the tool receiving section 150. Figure 2a and Figure 2b The diagram shows an impact mechanism 122, an intermediate shaft 120, a transmission unit 118, and an output shaft 124, wherein the intermediate shaft 120 exemplary partially constitutes the transmission unit 118. The intermediate shaft 120 is arranged between a drive motor 114 and a tool receiver 150, which are not shown here. The transmission unit 118 is configured as a planetary gear transmission 166, exemplarily configured with one planetary gear group. The transmission unit 118 includes a transmission cover 125 in addition to a transmission housing 119. Here, the transmission cover 125 is configured to at least partially close the transmission unit 118 relative to the drive motor 114. Here, the transmission cover 125 is arranged between the planetary gear transmission 166 and the drive motor 114. Furthermore, the planetary gear transmission 166 includes a hollow wheel 129, wherein the hollow wheel 129 and the transmission cover 125 are exemplary integrally constructed. The intermediate shaft 120 has an intermediate shaft bearing 164. The transmission cover 125 includes a receiving portion for an intermediate shaft bearing 164, such that the receiving portion for the intermediate shaft bearing 164 receives the intermediate shaft bearing 164. The intermediate shaft bearing 164 enables the intermediate shaft 120 to rotate relative to the transmission cover 125.

[0043] The drive motor 114 includes a drive shaft 116, which is supported in the housing 110 by means of a drive shaft bearing 117. The drive shaft 116 is not shown in FIG. 2. The drive shaft bearing 117 is exemplarily constructed as a needle roller bearing. Here, the drive shaft bearing 117 is arranged on the end of the drive motor 114 facing the tool receiving portion 150. The drive shaft 116 extends through the planetary gear transmission 166 into the intermediate shaft 120. Here, the drive shaft bearing 117 is arranged in the intermediate shaft 120.

[0044] Impact mechanism 122 is connected to drive motor 114 via planetary gear transmission 166. Impact mechanism 122 is configured as a V-groove impact mechanism. Impact mechanism 122 is arranged between drive motor 114 and tool receiving portion 150. Impactor 300 and radial spring system 350 are arranged in impact mechanism housing 123. Impact mechanism 122 includes impact mechanism cover 127, which closes impact mechanism 122 in the direction toward drive motor 114. Here, impact mechanism cover 127 can be arranged between drive motor 114 and planetary gear transmission 166. Here, impact mechanism cover 127 and transmission cover 125 are exemplary integrally constructed, wherein impact mechanism cover 127 then forms a hollow wheel 129.

[0045] The impactor 300 is supported on the intermediate shaft 120 by means of an impact mechanism ball 310. The impact mechanism ball 310 is configured to move the impactor 300 at least partially toward the drive motor 114. Figure 2a The impactor 300 is shown in the position facing the tool receiving section 150. The impactor 300 can also be arranged in the position facing the drive motor 114, see [reference needed]. Figure 2b In the position facing the tool receiver 150, the impactor 300 abuts against the rear end of the tool receiver 150, i.e., against the output shaft 124, by means of two impact protrusions 312, which are not shown in detail. In the position facing the drive motor 114, the impactor 300 is arranged spaced apart from the tool receiver 150.

[0046] In the radial spring system 350, the spring elements 352 are radially offset from the tool axis 102 and arranged in the circumferential direction around the tool axis 102. The radial spring system 350 has a plurality of spring elements 352, for example, eight spring elements 352 are provided, see also FIG5. The impactor 300 includes a receiving portion 302 for the spring elements 352 of the radial spring system 350. The number of receiving portions 302 for the radial spring system 350 corresponds to the number of spring elements 352. Here, the receiving portions 302 for the radial spring system 350 are can-shaped. A tab 305 is formed between each pair of adjacent spring elements 352, see FIG5 for this. The spring elements 352 are exemplary constructed as helical springs. The radial spring system 350 is torsionally connected to the impactor 300, wherein the spring elements 352 and the receiving portions 302 for the spring elements 352 are at least form-locked together. Here, the spring element 352 is inserted into one of the receiving portions 302 of the spring element 352 for the radial spring system 350.

[0047] The bearing 200 of the intermediate shaft 120 rotatably arranges the radial spring system 350 relative to the intermediate shaft 120 within the impact mechanism housing 123. The bearing 200 of the intermediate shaft 120 is exemplarily constructed as a needle roller bearing 202 having needle rollers 222 as rolling elements 220. The radial spring system 350 rests against the bearing 200. The intermediate shaft 120 includes a planet carrier 280 of a planetary gear transmission 166. The bearing 200 is arranged between the radial spring system 350 and the planet carrier 280. The planetary gear transmission 166, in addition to the planet carrier 280, also has planet gears 282, wherein the planet carrier 280 rotatably supports the planet gears 282 relative to the intermediate shaft 120 by means of corresponding bolts 284. The bearing 200 is axially arranged between the planet carrier and the radial spring system 350.

[0048] A radial spring system 350 rests against the bearing washer 210 of the bearing 200. The bearing washer 210 is arranged toward the tool receiving portion 150. Exemplarily, the bearing washer 210 is constructed as a gasket. The bearing washer 210 is axially arranged between the rolling element 220 and the radial spring system 350. Furthermore, one side of the bearing washer 210 is substantially flat, such that the needle roller 222 rests planarly against the bearing washer 210. The planetary carrier 280 is at least partially constructed as the bearing cover 240 of the bearing 200. Exemplarily, the planetary carrier 166 and the bearing cover 240 are integrally constructed. Furthermore, the bearing cover 240 is arranged toward the drive motor 114. Additionally, the bearing cover 240 is arranged opposite to the bearing washer 210. The bearing cover 240 supports the rolling elements 220 and receives these rolling elements flatly. The bearing 200 is composed of the bearing washer 210, the bearing cover 240, and the rolling elements 220. Bearing 200, particularly bearing washer 210, includes retaining element 244. Retaining element 244 is configured to radially retain rolling elements 220 of bearing 200. Retaining element 244 is radially arranged between tool axis 102 and rolling elements 220 and is constructed as a surrounding shoulder 245. Bearing washer 210 and retaining element 244 are integrally formed here. Bearing cover 240 has radial stop 246 designed to retain rolling elements 220. Radial stop 246 is constructed as a surrounding tab and is integrally formed with bearing cover 240. Radial stop 246 is radially arranged between rolling elements 220 and impact mechanism housing 123. Bearing cover 240 forms radial stop 246, making them integral.

[0049] The impactor 300 includes an abutment element 340 on its inner periphery, which is received by the journal 168 of the intermediate shaft 120. The abutment element 340 is configured to slide on the journal 168 of the intermediate shaft 120. During impact operation, the abutment element 340 of the impactor 300 extends into the retaining element 244 of the bearing 200, particularly the inner periphery 201 of the bearing washer 210, see also Figure 2b .

[0050] Figure 2b A partial longitudinal section 400 of the impact mechanism 122 in the second operating state 404 is shown. In the first operating state 404, the impactor 300 is arranged toward the drive motor 114. At the end stop of the impactor 300, the abutment element 340 is arranged radially between the intermediate shaft 120, particularly the journal 168 of the intermediate shaft 120 and the retaining element 244.

[0051] Figure 3A partial longitudinal section 420 of the impact mechanism is shown, which has the rotary carrier 500 of the present invention, wherein the impact mechanism 122 is shown in a first operating state 402. The rotary carrier 500 is arranged radially (particularly relative to the tool axis 102) between the intermediate shaft 120 and the impact mechanism housing 123. Furthermore, the rotary carrier 500 is arranged axially between the planetary gear transmission 166 and the driven shaft 124. The rotary carrier 500 extends axially along the tool axis 102. Exemplarily, two rotary carriers 500 are configured here, which are formed in the form of pins 502, see also... Figure 4 And 5. Two rotating actuators 500 are arranged in the circumferential direction of the tool axis 102. The impactor 300 includes at least one guide element 320, see also Figure 4 And 5. The guide element 320 of the impactor 300 is configured to receive the rotating carrier 500, see also Figure 4 For example, the impactor 300 here constitutes a guide element 320, making them integral. The guide element 320 of the impactor 300 is arranged in the circumferential direction of the tool axis 102 and extends axially (especially relative to the tool axis 102), see also Figure 4 And 5. Exemplarily, the guide element 320 of the impactor 300 is formed in the form of two abutting tabs 322. Here, two guide elements 320 are formed for each rotating actuator 500, see also Figure 4 And 5. The guide element 320 of the impactor 300 at least partially surrounds the rotating carrier 500. During impact operation, the rotating carrier 500 abuts against the guide element 320 of the impactor 300. Furthermore, the impactor 300 includes at least one rotating receiving portion 330. The rotating receiving portion 330 is configured, at least during impact operation, to receive the rotating carrier 500. The impactor 300 forms the rotating receiving portion 330 such that they are integral. Exemplarily, the rotating receiving portion 330 is formed in the form of a groove 332. In a first position of the impactor 300, the rotating carrier 500 is substantially arranged outside the rotating receiving portion 330. Typically, the impact mechanism 122 is in a first operating state 402 here, see also Figure 4In the second position of the impactor 300, the rotating carrier 500 extends into the rotating receiving portion 330, but this is not shown in detail. The rotating receiving portion 330 and the guide element 320 of the impactor 300 are arranged axially relative to each other and substantially coaxially with the tool axis 102 within the impact mechanism housing 123. The impactor 300 is integral with the guide element 320 and the rotating carrier 330. The number of rotating receiving portions 330 corresponds to the number of rotating carriers 500. Exemplarily, two rotating receiving portions 330 are provided here. The bearing 200, especially the bearing washer 210, constitutes the rotating carrier 500. Furthermore, the retaining element 244 for the rolling element 220 of the bearing 200 and the rotating carrier 500 are integral. Furthermore, the bearing washer 210 and the rotating carrier 500 are arranged at an angle to each other, especially substantially perpendicularly. Figure 4 A partial longitudinal section 430 of the impact mechanism 122, having rotating carriers 500, is shown, wherein the impact mechanism 122 is shown in a first operating state 402. The two rotating carriers 500 are substantially arranged within the impact mechanism housing 123, wherein the journal 168 of the intermediate shaft 120 is radially arranged between the two rotating carriers 500.

[0052] Figure 5a A perspective view 414 of the impactor 300 is shown. A rotating actuator 500 is arranged between two spring elements 352 of the radial spring system 350, where the spring elements 352 are not shown here. Spring receivers 302 are shown, into which the spring elements are inserted when the impact mechanism 122 is assembled. Figure 5b A perspective view 440 shows a bearing washer 210 with a rotating actuator 500. Two pin-shaped rotating actuators 500, 502 are arranged opposite each other.

[0053] Figure 6 A partial longitudinal section 450 of the impact mechanism 122 is shown, which has an alternative embodiment with a rotating actuator 500. The impact mechanism 122 is shown in a first operating state 402. The rotating actuator 500 is constructed in the form of a hollow wheel 504. Here, the bearing washer 210 and the rotating actuator 500, as the hollow wheel 504, are arranged at an angle to each other and are integral. The guide element 320 of the impactor 300 is constructed in the form of a gear 324. The rotating actuator 500, as the hollow wheel 504, can be form-locked into the guide element 320, which is the gear 324. The rotating receiving portion 330 is constructed in the form of an annular groove 334.

Claims

1. A handheld machine tool (100), comprising: Shell (110) Drive motor (114). Intermediate shaft (120), where, The intermediate shaft (120) can be driven by the drive motor (114). An impact mechanism (122) having an impactor (300) and a radial spring system (350) to which the impactor (300) is torsionally connected, wherein the impact mechanism (122) is at least partially driveable via the intermediate shaft (120), and A tool receiving section (150) for receiving an insert tool (140), wherein the tool receiving section (150) is driveable by means of the impact mechanism (122), particularly the impactor (300), and / or the intermediate shaft (120), wherein the intermediate shaft (120) has at least one bearing (200) against which a radial spring system (350) rests. The feature is that it includes a rotating carrier (500) configured to couple at least the impactor (300) to the bearing (200).

2. The handheld machine tool (100) according to claim 1, characterized in that, The rotating carrier (500) is arranged radially between the intermediate shaft (120) and the impact mechanism housing (122).

3. The handheld machine tool (100) according to claim 1 or 2, characterized in that, The intermediate shaft (120) has at least one planetary carrier (280), wherein the bearing (200) is arranged between the radial spring system (350) and the planetary carrier (280).

4. The handheld machine tool (100) according to any one of claims 1 to 3, characterized in that, The radial spring system (350) rests against the bearing washer (210) of the bearing (200).

5. The handheld machine tool (100) according to claim 3 or 4, characterized in that, The planetary carrier (280) is at least partially constructed as a bearing cover plate (240).

6. The handheld machine tool (100) according to any one of the preceding claims, characterized in that, The impactor (300) has at least one guide element (320) configured to receive the rotating carrier (500).

7. The handheld machine tool (100) according to claim 6, characterized in that, The impactor (300) has at least one rotating receiving part (330) configured, at least during impact operation, to receive the rotating carrier (500).

8. The handheld machine tool (500) according to any one of the preceding claims, characterized in that, The bearing (200) constitutes the rotating drive (500).

9. The handheld machine tool (100) according to any one of the preceding claims, characterized in that, The rotating actuator (500) is arranged between the two spring elements (352) of the radial spring system (350).

10. The handheld machine tool (100) according to any one of the preceding claims, characterized in that... Two rotating actuators (500) are provided, which are arranged opposite to each other in the impact mechanism (122).

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