Hand-held power tool

Abstract

A hand-held power tool, comprising: an output shaft, which comprises an output axis defined by itself; and an output housing, which defines a first central axis passing through its own geometric center, wherein the radial distance between the first central axis and the outer edge of the output housing is R; the output shaft comprises a first position and a second position; when the output shaft is located at the first position, the radial distance between the output axis and the first central axis is D1; and when the output shaft is located at the second position, the radial distance between the output axis and the first central axis is D2, D1 being less than D2, D1 being greater than or equal to 0, but less than R, and D2 being greater than 0, but less than or equal to R.

Description

Handheld power tools

[0001] This application claims the priority of Chinese patent application No. 202311736371.1 filed with the China Patent Office on December 15, 2023, the priority of Chinese patent application No. 202311733949.8, the priority of Chinese patent application No. 202311736367.5, the priority of Chinese patent application No. 202311729091.8 and the priority of Chinese patent application No. 202323436620.3. The entire contents of the above applications are incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of power tools, for example, to a handheld power tool. Background Art

[0003] In the related art, handheld power tools are widely used in life due to their convenience and high output efficiency. When using handheld power tools, there are often obstacles on one side, such as the connection between the wall and the floor, the internal position of the cabinet, or other working conditions that require offset output shafts. In the related art, the output shaft of handheld power tools, especially fastening tools, is basically located in a relatively central position of the machine to ensure the stability of the torque output process. However, when encountering working conditions that require contact with the edge, the machine needs to be tilted to operate, which can easily lead to the scrapping of fasteners or damage to the workpiece.

[0004] This section provides background information related to the present application which is not necessarily prior art. Summary of the Invention

[0005] The present application can solve or at least alleviate part or all of the above problems. To this end, the present application provides a handheld power tool that can achieve output shaft offset.

[0006] A handheld power tool comprises: a motor including a drive shaft rotating about a first axis; a drive housing accommodating at least the motor; an output shaft including an output axis defined by itself, the output shaft rotating about the output axis to output power; an output housing configured to support the rotation of the output shaft, the output housing defining a first central axis passing through a geometric center; a radial distance R between the first central axis and an outer edge of the output housing; the output shaft comprising a first position and a second position; wherein, when the output shaft is in the first position, the radial distance between the output axis and the first central axis is D1; ​​when the output shaft is in the second position, the radial distance between the output axis and the first central axis is D2, D1 is less than D2, D1 is greater than or equal to 0 and less than R, and D2 is greater than 0 and less than or equal to R.

[0007] In some embodiments, the output housing rotates relative to the drive housing about the first central axis.

[0008] In some embodiments, when the output shaft is in the second position, the output shaft rotates relative to the drive housing about the first central axis.

[0009] In some embodiments, the system further includes a first locking portion configured to hold the output shaft in the first position or the second position.

[0010] In some embodiments, when the output shaft is in the first position, the output shaft rotates relative to the drive housing about the first central axis.

[0011] In some embodiments, the output shaft forms or is connected to a clamping portion for connecting to a working component, and the working component is configured to perform the function of a handheld power tool.

[0012] In some embodiments, the output housing further includes a first bearing that supports the output shaft to rotate around the output axis, and the output housing is provided with a receiving portion configured to receive the first bearing.

[0013] In some embodiments, the system further includes a second locking assembly configured to selectively lock the output housing from rotating relative to the drive housing.

[0014] In some embodiments, the output shaft rotates relative to the output housing about a third axis to switch between the first position and the second position, and the third axis is eccentrically disposed with respect to the first central axis.

[0015] In some embodiments, a transmission mechanism is further included, configured to connect the drive shaft and the output shaft. The transmission mechanism is configured with a transmission shaft that itself defines a second axis. The transmission shaft drives the output shaft. When the output shaft is in the first position or the second position, the output axis radially deviates from the second axis.

[0016] In some embodiments, a second housing is further included, which rotates relative to the drive housing; when in a biased state where the output axis and the second axis are radially offset, the second housing is rotated to adjust the relative position of the output axis with respect to the second axis; the length from the rear end of the second housing to the end face where the output shaft extends out of the second housing is less than or equal to 56 mm.

[0017] In some embodiments, the handheld power tool includes a first state in which the output axis is substantially coaxial with the second axis and a second state in which the output axis is radially offset from the second axis; when the handheld power tool is in the first state, the output axis is substantially coaxial with the first central axis.

[0018] In some embodiments, a clutch assembly is included, which is connected between the transmission shaft and the output shaft. The clutch assembly can selectively connect the transmission shaft and the output shaft in a first position, or the transmission shaft and the output shaft in a second position.

[0019] In some embodiments, the clutch assembly includes: a connected state in which the transmission shaft and the output shaft transmit torque, and a disconnected state in which the transmission shaft and the output shaft are disconnected from each other. When the clutch assembly is in the disconnected state, the output shaft is configured to move in a direction perpendicular to the first axis.

[0020] In some embodiments, when the clutch assembly is in the disengaged state, the output shaft switches between the first position and the second position.

[0021] One embodiment of the present application provides a handheld power tool, comprising: a motor, including a drive shaft rotating around a first axis; a drive housing, at least accommodating the motor; an output shaft, including an output axis defined by itself, the output shaft rotating around the output axis to output power; an output housing, configured to support the rotation of the output shaft, the output housing defining a first center axis passing through a geometric center; the output shaft including a first position and a second position; wherein, when the output shaft is in the first position, the radial distance between the output axis and the first center axis is D1; ​​when the output shaft is in the second position, the radial distance between the output axis and the first center axis is D2, and D1 is not equal to D2.

[0022] One embodiment of the present application provides a handheld power tool, comprising: a motor, including a drive shaft rotating around a first axis; a drive housing, at least accommodating the motor; an output shaft, including an output axis defined by itself, the output shaft rotating around the output axis to output power; an output housing, configured to support the rotation of the output shaft, the output housing defining a first center axis passing through the geometric center; wherein the output shaft moves relative to the output housing so that the output axis is radially offset relative to the first center axis.

[0023] In some embodiments, the output shaft rotates relative to the output housing about a third axis, and the third axis is eccentrically disposed with respect to the first central axis.

[0024] In some embodiments, the output shaft forms or is connected to a clamping portion for connecting to a working component, and the working component is configured to perform the function of a handheld power tool.

[0025] In some embodiments, the output housing further includes a first bearing that supports the output shaft to rotate around the output axis, and the output housing is provided with a receiving portion configured to receive the first bearing.

[0026] One embodiment of the present application provides a handheld power tool, comprising: a motor, comprising a drive shaft rotating around a first axis; a drive housing, configured to at least accommodate the motor; an output shaft, comprising an output axis defined by itself, the output shaft rotating around the output axis to output power; a transmission mechanism connected to the drive shaft, the transmission mechanism being configured with a transmission shaft driving the output shaft, the transmission shaft itself defining a second axis, the transmission shaft rotating around the second axis; an output housing, configured to support the rotation of the output shaft, the output housing defining a first central axis passing through a geometric center; the handheld power tool comprising: a first state in which the output axis is substantially coaxial with the second axis and a second state in which the output axis is radially offset from the second axis; when in the first state, the output axis is substantially coaxial with the first central axis.

[0027] In some embodiments, the output shaft rotates relative to the output housing about a third axis, and the third axis is eccentrically disposed with respect to the first central axis.

[0028] In some embodiments, the output shaft includes a first position where the output axis is at a radial distance D1 from the first central axis and a second position where the output axis is at a radial distance D2 from the first central axis.

[0029] In some embodiments, when the handheld power tool is in the second state, the output shaft is radially displaced about the third axis relative to the output housing to a second position.

[0030] In some embodiments, when the handheld power tool is in the first state, the output shaft is in a first position, and in the first position, the output axis is substantially coaxial with the first central axis.

[0031] In some embodiments, the output housing rotates relative to the drive housing about the first central axis.

[0032] In some embodiments, the output shaft forms or is connected to a clamping portion for connecting to a working component, and the working component is configured to perform the function of a handheld power tool.

[0033] In some embodiments, the output housing further includes a first bearing that supports the output shaft to rotate around the output axis, and the output housing is provided with a receiving portion configured to install the first bearing.

[0034] In some embodiments, a clutch assembly is included, which is connected between the transmission shaft and the output shaft. The clutch assembly can selectively connect the transmission shaft with the output shaft in a first position and the transmission shaft with the output shaft in a second position.

[0035] One embodiment of the present application provides a handheld power tool, comprising: a motor, comprising a drive shaft rotating about a first axis; a drive housing, configured to at least accommodate the motor; an output shaft, comprising an output axis defined by itself, the output shaft rotating about the output axis to output power; a transmission mechanism, configured to connect the drive shaft and the output shaft, the transmission mechanism being provided with a transmission shaft connected to the output shaft, the transmission shaft itself defining a second axis, the transmission shaft rotating about the second axis; an output housing, configured to support the rotation of the output shaft, the output housing defining a first central axis passing through a geometric center; the handheld power tool comprising: a first state in which the output axis is substantially coaxial with the second axis and a second state in which the output axis is radially offset from the second axis; when in the first state, the radial distances of the output axis from the outer edge of the output housing in the same radial direction are L1 and L2, respectively, wherein the ratio of L1 / L2 is greater than or equal to 0.4 and less than or equal to 1.

[0036] In some embodiments, in the first state, radial distances of the output axis from the outer edge of the output housing in the same radial direction are L1 and L2 respectively, wherein a ratio of L1 / L2 is greater than or equal to 0.6 and less than or equal to 1.

[0037] In some embodiments, in the first state, radial distances of the output axis from the outer edge of the output housing in the same radial direction are L1 and L2 respectively, wherein a ratio of L1 / L2 is greater than or equal to 0.8 and less than or equal to 1.

[0038] One embodiment of the present application provides a handheld power tool, comprising: a motor, comprising a drive shaft rotating around a first axis; a drive housing, configured to at least accommodate the motor; an output shaft, comprising an output axis defined by itself, the output shaft rotating around the output axis to output power; a transmission mechanism, configured to connect the drive shaft and the output shaft, the transmission mechanism being provided with a transmission shaft connected to the output shaft; a clutch assembly, disposed between the transmission shaft and the output shaft; the clutch assembly comprising: a connection state in which the transmission shaft and the output shaft transmit torque, and a separation state in which the transmission shaft and the output shaft are disengaged from each other, wherein when the clutch assembly is in the separation state, the output shaft is configured to move in a direction perpendicular to the first axis.

[0039] In some embodiments, it also includes: an output housing configured to support the rotation of the output shaft, the output housing defining a first central axis passing through the geometric center; the output shaft includes: a first position at which the output axis is at a radial distance D1 from the first central axis and a second position at which the output axis is at a radial distance D2 from the first central axis.

[0040] In some embodiments, when the clutch assembly is in the disengaged state, the output shaft switches between the first position and the second position.

[0041] In some embodiments, the clutch assembly includes a first locking portion configured to retain the output shaft in the first position or the second position.

[0042] In some embodiments, the first locking portion includes a first limiting portion corresponding to the first position and a second limiting portion corresponding to the second position, and the output shaft can be selectively connected to the first limiting portion or the second limiting portion at the corresponding position.

[0043] In some embodiments, the clutch assembly further includes a reset portion configured to drive the clutch assembly to switch from a disconnected state to a connected state.

[0044] In some embodiments, the output shaft forms or is connected to a clamping portion for connecting to a working component, and the working component is configured to perform the function of a handheld power tool.

[0045] In some embodiments, the output housing further includes a first bearing that supports the output shaft to rotate around the output axis, and the output housing is provided with a receiving portion configured to receive the first bearing.

[0046] In some embodiments, the output shaft rotates relative to the output housing about a third axis, and the third axis is offset from the first central axis.

[0047] In some embodiments, the clutch assembly rotates synchronously with the output housing.

[0048] One embodiment of the present application provides a handheld power tool, comprising: a motor, including a drive shaft rotating around a first axis; a drive housing, configured to at least accommodate the motor; an output shaft, including an output axis defined by itself, the output shaft rotating around the output axis to output power; a transmission mechanism, configured to connect to the drive shaft, the transmission mechanism configuring a transmission shaft; an output transmission assembly, arranged between the transmission shaft and the output shaft; the output transmission assembly including an input portion connected to the transmission shaft, and an output portion connected to the output shaft; the output portion including a first transmission wheel and a second transmission wheel, the output shaft can be selectively coupled to the first transmission wheel or the second transmission wheel to transmit the power of the transmission shaft to the output shaft.

[0049] In some embodiments, an output housing is further included, configured to support the rotation of an output shaft, the output housing being configured with a first central axis passing through the geometric center; the output shaft includes: a first position at which the output axis is at a radial distance D1 from the first central axis and a second position at which the output axis is at a radial distance D2 from the first central axis.

[0050] In some embodiments, when the output shaft is in the first position, the output shaft is coupled to the first transmission wheel.

[0051] In some embodiments, the axes of the first transmission wheel and the second transmission wheel are substantially parallel to each other, and the first transmission wheel and the second transmission wheel rotate in the same direction.

[0052] In some embodiments, the output portion further includes a third transmission wheel, which is transmission-connected to the first transmission wheel and the second transmission wheel respectively.

[0053] In some embodiments, the output shaft forms or is connected to a clamping portion for connecting to a working component, and the working component is configured to perform the function of a handheld power tool.

[0054] In some embodiments, the output housing further includes a first bearing that supports the output shaft to rotate around the output axis, and the output housing is provided with a receiving portion configured to receive the first bearing.

[0055] In some embodiments, the output housing rotates relative to the drive housing about the first central axis.

[0056] In some embodiments, the output shaft rotates relative to the output housing about a third axis, and the third axis is eccentrically disposed with respect to the first central axis.

[0057] In some embodiments, an axis of at least one of the first transmission wheel and the second transmission wheel is offset from the first central axis, and when the output housing rotates relative to the drive housing around the first central axis, the offset transmission wheel rotates relative to the drive housing around the first central axis.

[0058] One embodiment of the present application provides a handheld power tool, comprising: a motor, comprising a drive shaft rotating about a first axis; a drive housing, configured to at least accommodate the motor; an output shaft, comprising an output axis defined by itself, the output shaft rotating about the output axis to output power; a transmission mechanism, configured to connect the drive shaft and the output shaft, the transmission mechanism being provided with a transmission shaft driving the output shaft, the transmission shaft itself defining a second axis, the transmission shaft rotating about the second axis; a second housing, rotating relative to the drive housing; the handheld power tool comprising: a biased state in which the output axis and the second axis are radially offset; adjusting the relative position of the output axis relative to the second axis by rotating the second housing; a length from the rear end of the second housing to the end face of the output shaft extending out of the second housing being less than or equal to 56 mm.

[0059] In some embodiments, the length from the rear end of the second housing to the end surface of the output shaft extending out of the second housing is less than or equal to 50 mm.

[0060] In some embodiments, the second housing includes an output housing configured to support rotation of the output shaft, the output housing being configured with a first central axis passing through a geometric center.

[0061] In some embodiments, the output housing further includes a first bearing that supports the output shaft to rotate around the output axis, and the output housing is provided with a receiving portion configured to receive the first bearing.

[0062] In some embodiments, the output shaft includes a first position where the output axis is at a radial distance D1 from the first central axis and a second position where the output axis is at a radial distance D2 from the first central axis.

[0063] In some embodiments, the output shaft forms or is connected to a clamping portion for connecting to a working component, and the working component is configured to perform the function of a handheld power tool.

[0064] In some embodiments, the system further includes: an output transmission assembly, wherein the output transmission assembly is disposed between the transmission shaft and the output shaft.

[0065] In some embodiments, the output transmission assembly includes a first transmission wheel and a second transmission wheel, the output shaft can be selectively coupled to the first transmission wheel or the second transmission wheel, and the first transmission wheel and the second transmission wheel are respectively arranged on the first plane of the wheel frame.

[0066] In some embodiments, when the output shaft is in the second position, the output shaft rotates relative to the drive housing about the first central axis.

[0067] In some embodiments, a radial distance between the first central axis and the outer edge of the output housing is R; wherein D1 is smaller than D2, D1 is greater than or equal to 0 and smaller than R, and D2 is greater than 0 and smaller than or equal to R.

[0068] An embodiment of the present application provides a handheld power tool, comprising: a motor including a drive shaft rotating about a first axis; a drive housing accommodating at least the motor; an output shaft including an output axis defined by itself, the output shaft rotating about the output axis to output power; a transmission mechanism connected to the drive shaft, the transmission mechanism being configured with a transmission shaft;

[0069] In some embodiments, the handheld power tool further includes an output transmission assembly disposed between the drive shaft and the output shaft. The output transmission assembly includes an input portion connected to the drive shaft, an output portion connected to the output shaft, and a first intermediate gear. The output shaft is rotatably connected to the first intermediate gear. The output shaft rotates relative to the first intermediate gear about an output axis. The first intermediate gear is driven to rotate about a third axis, thereby causing the output shaft to rotate about the third axis.

[0070] In some embodiments, the output transmission assembly includes a transmission housing, the transmission housing at least partially accommodating the first intermediate gear, and the transmission housing is rotated to drive the first intermediate gear to rotate around the third axis.

[0071] In some embodiments, the first intermediate gear includes a sector gear, which is driven to reciprocate around the third axis, thereby driving the output shaft to switch between the first position and the second position.

[0072] One embodiment of the present application provides a handheld power tool, comprising: a motor, including a drive shaft rotating around a first axis; a drive housing, at least accommodating the motor; an output shaft, including an output axis defined by itself, the output shaft rotating around the output axis to output power; an output housing, configured to support the rotation of the output shaft, the output housing defining a first center axis passing through a geometric center; the output axis is offset from the first center axis, the output housing rotates around the first center axis relative to the drive housing, so that the output shaft rotates around the first center axis relative to the drive housing.

[0073] In some embodiments, the handheld power tool further comprises an output transmission assembly disposed between the drive shaft and the output shaft. The output transmission assembly comprises an input portion for inputting power, and an output portion connected to the output shaft, wherein when the output shaft is in the second position, the output portion is offset from the input portion.

[0074] In some embodiments, the output transmission assembly includes a first inner gear ring, and the input portion and the output portion are respectively engaged with the first inner gear ring.

[0075] In some embodiments, the central axis of the first inner ring gear is substantially coaxial with the first central axis.

[0076] In some embodiments, when the output shaft switches between the first position and the second position, the driven wheel rotates around the first central axis along the inner teeth of the first inner gear ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] FIG1 is a structural diagram of a handheld power tool according to an embodiment of the present application, wherein the handheld power tool is in a first state;

[0078] FIG2 is a structural diagram of a handheld power tool according to an embodiment of the present application from another perspective, wherein the output shaft is in a first position;

[0079] FIG3 is a structural diagram of a handheld power tool according to an embodiment of the present application, wherein the output shaft is in a second position;

[0080] FIG4 is a structural diagram of a handheld power tool from another perspective according to an embodiment of the present application, wherein the handheld power tool is in a second state;

[0081] 5A-5C are schematic structural diagrams of a handheld power tool in an embodiment of the present application when the output shaft is in the second position;

[0082] FIG6 is a structural diagram of the handheld power tool in FIG4 from another perspective;

[0083] FIG7 is a cross-sectional view taken along line AA of the structural diagram of the handheld power tool in FIG2 from another perspective;

[0084] FIG8 is a partial structural diagram of the internal structure of a handheld power tool according to an embodiment of the present application;

[0085] FIG9 is a schematic half-sectional view of a partial structure of the internal structure of the handheld power tool of FIG8 ;

[0086] FIG10 is an exploded view of a partial structure of a handheld power tool according to an embodiment of the present application, wherein the output shaft is in a first position;

[0087] FIG11 is an exploded view of a portion of the structure of a handheld power tool according to an embodiment of the present application, wherein the output shaft is in the second position;

[0088] FIG12 is a cross-sectional view of a clamping portion of a handheld power tool according to an embodiment of the present application;

[0089] FIG13A is a structural diagram of a handheld power tool according to an embodiment of the present application, wherein the output shaft is in a first position;

[0090] FIG13B is a structural diagram of a handheld power tool according to an embodiment of the present application from another perspective, wherein the output shaft is in the first position;

[0091] FIG14 is a structural diagram of a handheld power tool according to an embodiment of the present application from another perspective, wherein the output shaft is in a second position;

[0092] FIG15 is a diagram showing the internal structure of an output transmission assembly of a handheld power tool according to an embodiment of the present application;

[0093] FIG16 is an exploded view of a partial structure of a handheld power tool according to an embodiment of the present application;

[0094] FIG17 is a structural diagram of a handheld power tool according to an embodiment of the present application, wherein the output shaft is in a first position;

[0095] FIG18 is a structural diagram of a handheld power tool according to an embodiment of the present application from another perspective, wherein the output shaft is in a second position;

[0096] FIG19 is a half-sectional view of a partial structure of a handheld power tool according to an embodiment of the present application;

[0097] FIG. 20 is an exploded view of a partial structure of a handheld power tool according to an embodiment of the present application. DETAILED DESCRIPTION

[0098] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0099] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0100] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0101] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0102] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, %, 1% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, degree, 1 degree or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0103] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0104] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0105] In order to clearly illustrate the technical solution of the present application, the upper side, lower side, left side, right side, front side and rear side are defined in the drawings of the specification.

[0106] As shown in FIG1 , a handheld power tool is shown. In this embodiment, the handheld power tool is an electric drill 100. In some embodiments, the handheld power tool may be another handheld tool, such as an impact wrench, an impact screwdriver, a screwdriver, an impact drill, an electric hammer, an angle grinder, or an angle tool. In some embodiments, the handheld power tool is a tool that uses a rotational output to achieve power. In some embodiments, the handheld power tool is a tool that uses a rotational output to achieve fastening or loosening of fasteners.

[0107] As shown in Figure 1, an electric drill 100 is taken as an example. The electric drill 100 includes a power supply 30. Among them, in this embodiment, the power supply 30 is a DC power supply. The DC power supply provides electrical energy for the electric drill 100. The DC power supply is a battery pack, and the battery pack cooperates with the corresponding power supply circuit to power the electric drill 100. Those skilled in the art should understand that the power supply is not limited to the scenario of using a DC power supply, and can also be powered by AC power, AC power, and corresponding rectification, filtering and voltage regulation circuits to achieve power supply to the corresponding components in the machine. In the subsequent description, the battery pack 30 will be used instead of the power supply, but it cannot be used as a limitation to this application.

[0108] As shown in Figures 1 to 9, the electric drill 100 includes a housing 11, a motor 12, an output assembly 13, and a transmission mechanism 14. The motor 12 includes a drive shaft 121 that rotates about a first axis 101. In this embodiment, the motor 12 is specifically configured as an electric motor. Hereinafter, the term "motor" will be used instead of "motor", but this does not limit the present application. In this embodiment, the motor 12 includes a stator assembly 122 and a rotor assembly 123. The rotor assembly 123 is formed with or connected to the drive shaft 121 that rotates about the first axis 101. In this embodiment, the motor 12 is an inner rotor brushless motor. In other alternative embodiments, the motor 12 is an outer rotor brushless motor. For inner rotor motors, the stator assembly 122 is mounted on the outside of the rotor assembly 123. For outer rotor motors, the rotor assembly 123 is mounted on the outside of the stator assembly 122. In this embodiment, the brushless motor is configured as a three-phase brushless motor. It is understandable that the motor is not limited to a three-phase brushless motor, and may also be other types of DC motors. The above does not affect the substantive content of this application.

[0109] As shown in Figure 1, the housing 11 includes a drive housing 111 that houses the motor and a second housing 112 that houses at least a portion of the output assembly 13. The second housing 112 is connected to the front end of the drive housing 111. In this embodiment, the housing 11 also forms or is connected to a grip portion 114 for user operation, facilitating gripping and operation. One end of the grip portion 114 is connected to the battery pack 30.

[0110] The output assembly 13 is configured to drive working accessories to realize the functions of the handheld power tool. In this embodiment, the output assembly 13 includes an output shaft 131. The output shaft 131 is configured to output power, and the output shaft 131 rotates around the output axis 104. A clamping portion 132 is provided at the front end of the output shaft 131, which can clamp corresponding working accessories, such as a drill bit, a screwdriver, a socket, etc., when realizing different functions. Optionally, the clamping portion 132 is a quick-detachable clamping component. As shown in Figure 12, in some embodiments, when the handheld power tool is another type of drill, the clamping portion 132' at the front end of the output shaft 131 is a multi-claw clamping chuck structure. For those skilled in the art, both the clamping portion 132 and the clamping portion 132' are traditional related structures in nature. Therefore, in this application, for the purpose of brevity of the specification, detailed description is omitted and no specific restrictions are made.

[0111] As shown in Figures 7 to 9, a transmission mechanism 14 is connected between the output component 13 and the motor 12, for example, a high-speed, high-torque output tool such as a screwdriver or drill. The transmission mechanism 14 is configured to connect the drive shaft 121 and the output shaft 131. The transmission mechanism 14 is configured as a transmission shaft 141 that defines a second axis 102, and the transmission shaft 141 is connected to the output shaft 131. In this embodiment, the transmission mechanism 14 is a reduction gear system. Optionally, the transmission mechanism 14 includes a planetary gear set 142 for achieving deceleration, and the number of planetary gear sets 142 can be one or more stages. The planetary gear set 142 converts the output speed of the motor 12 according to a certain transmission ratio to achieve a suitable torque. In this embodiment, a sun gear is formed on or connected to the drive shaft 121, and the planetary gears are engaged with the sun gear. The transmission shaft 141 is configured on the planetary carrier closest to the output shaft 131. It can be understood that the transmission shaft 141 is the torque output end of the transmission mechanism 14, and the torque or speed on the transmission shaft 141 is the final torque or speed of the drive shaft 121 after the deceleration and torque increase process of the transmission mechanism 14.

[0112] In some alternative embodiments, the transmission mechanism 14 further includes an impact assembly, such as an impact wrench, impact drill, or electric hammer, for applying an impact force to the output shaft 131. Optionally, the transmission shaft 141 is the impact force output shaft of the impact assembly, that is, the transmission shaft 141 is the impact force output end of the transmission mechanism 14.

[0113] In this embodiment, the first axis 101 coincides with the second axis 102. In other alternative embodiments, the second axis 102 is arranged at a certain angle to the first axis 101. In other alternative embodiments, the second axis 102 and the output axis 104 are arranged parallel to each other but do not coincide.

[0114] The transmission mechanism 14 also includes a shift assembly 143 to achieve multiple output gears through multiple sets of gears with different transmission ratios. Because the working principle of planetary gear reduction and the reduction speed generated by this transmission mechanism 14 are well known to those skilled in the art, a detailed description is omitted here for the sake of brevity.

[0115] The shift assembly 143 includes a speed dial knob 1431 , which is disposed on the drive housing 111 or the second housing 112 . Shifting the speed dial knob 1431 can achieve multi-gear output through multiple sets of gears with different transmission ratios.

[0116] As shown in Figures 1 to 7, the electric drill 100 also includes a main switch 161 and a switching unit 163. The main switch 161 is a trigger switch. The trigger switch is located on the grip 114 for user operation. The rotational speed of the motor 12 is adjusted based on the trigger stroke of the trigger switch. In this embodiment, the trigger switch is coupled to a sliding rheostat 162. Different trigger strokes of the trigger switch result in different analog signals output by the sliding rheostat 162. The trigger stroke of the trigger switch is positively correlated with the duty cycle of the pulse width modulation (PWM) signal of the motor 12, and the duty cycle of the PWM signal is positively correlated with the rotational speed of the motor 12. When the trigger stroke of the trigger switch is small, the duty cycle of the PWM signal is also small, and in this case, the rotational speed of the motor 12 is also small. In some embodiments, the impact wrench stores a mapping relationship between the trigger stroke of the trigger switch and the PWM signal. This mapping relationship can be linear or nonlinear, and is not limited in this embodiment of the present application.

[0117] The switching portion 163 is provided on the upper side of the trigger switch, and is configured to be operated to set the rotation direction of the motor to a forward rotation direction for tightening the fastener or a reverse rotation direction for loosening the fastener.

[0118] In this embodiment, the second housing 112 includes an output housing 113 configured to support the rotation of an output shaft 131. As shown in Figures 7 to 9, the output housing 113 is provided with a housing 1131. A first bearing 115 is provided on the outer surface of the output shaft 131 to support the rotation of the output shaft 131 about the output axis 104. The housing 1131 is configured to receive the first bearing 115. Optionally, the first bearing 115 is a ball bearing, the inner race of which is connected to the output shaft 131. It will be appreciated that when the motor 12 begins to output power through the drive shaft 121, the output shaft 131 rotates about the output axis 104 relative to the output housing 113 to operate the fastener. Optionally, the first bearing 115 may also include a sliding bearing, such as an oil-containing bearing. In some embodiments, such as a drill, as shown in Figure 12, the clamping portion 132' is also provided with a clamping portion housing 1321'. In this embodiment, the housing of the clamping portion 132' is not part of the output housing 113.

[0119] As shown in Figures 1-2, the electric drill 100 can have two states: a first state in which the output axis 104 is substantially coaxial with the second axis 102, and a second state in which the output axis 104 is radially offset from the second axis 102, as shown in Figures 3-5. The first state, as shown in Figures 1-2, can be understood as a "centered" state of the output shaft 131, a common operating condition for handheld power tools used for fastening. The second state, as shown in Figures 3-5, can be understood as an offset "edge" state in which the output shaft 131 is positioned.

[0120] As shown in Figures 1 to 4, the output shaft 131 moves relative to the output housing 113 to radially offset the output shaft 131 relative to the first central axis 105. It can be understood that each movement of the output shaft 131 relative to the output housing 113 is configured with a stop point, and each stop point is offset radially from the other stop points along the first central axis 105. The relative movement of the output shaft 131 relative to the output housing 113 enables the electric drill 100 to achieve a first state and a second state. In related art, handheld fastening tools capable of achieving an offset flushing function for the output shaft 131 typically employ an accessory mounted on the output shaft 131. The accessory's output shaft is eccentrically disposed relative to the machine's output shaft 131, meaning that the accessory's output axis is radially offset from the machine's output axis 104. When an offset flushing function for the output shaft 131 is required, the accessory is installed on the machine. Such a structure requires the user to carry additional accessories when working, and it is also necessary to disassemble and assemble the working accessories (such as the bit) on the accessories and the machine body multiple times during use to adapt to the edge-fitting and non-edge-fitting working conditions, which is not conducive to work efficiency.

[0121] In this embodiment, the output shaft 131 moves radially relative to the output housing 113 along the first central axis 105. Specifically, the output shaft 131 has a first position, as shown in FIG2 , and a second position, as shown in FIG4 . In the first position, the radial distance D1 between the output axis 104 and the first central axis 105 is located. In the second position, the radial distance D2 between the output axis 104 and the first central axis 105 is located. D1 is smaller than D2. When the radial distance R between the first central axis 105 and the outer edge of the output housing 113 is defined as D1, D1 is greater than or equal to 0 and less than R, and D2 is greater than or equal to R and less than R. Therefore, when the output shaft 131 is in the first position, the electric drill 100 is in the first state or one of the first states. When the output shaft 131 is in the second position, the electric drill 100 is in the second state or one of the second states.

[0122] According to the above definition of the output housing 113, the output housing 113 is configured to support the rotation of the output shaft 131. In this embodiment, the output housing 113 houses the first bearing 115. Optionally, the output housing 113 is substantially circular or quasi-circular in its projection along the front-to-back direction, and the output housing 113 is configured with a first central axis 105 passing through its geometric center. Optionally, the geometric center is the center of the output housing 113, and the first central axis 105 is the central axis of the output housing 113. As shown in Figures 2, 4, and 6, the radial distance between the first central axis 105 and the outer edge of the output housing 113 is R, where R is the radius of the output housing 113 or the radius of the projection of the output housing 113 along the front-to-back direction. In some alternative embodiments, the output housing 113 is a polygon, in which case the first central axis is a straight line extending along the front-to-back direction through the geometric center. The radial distance between the first central axis 105 and the outer edge of the output housing 113 is R, but R is not necessarily a constant value. The above description does not affect the substantive content of this application.

[0123] By providing an output shaft 131 that can move radially relative to the output housing 113, it is possible to achieve both a conventional centered configuration and an offset configuration with the output shaft 131 offset from the center without the use of accessories. Users can switch between the two configurations simply by adjusting the position of the output shaft 131, making switching convenient and improving work efficiency. This eliminates the need to carry additional accessories, enhancing the user experience.

[0124] By enabling the output shaft 131 to move relative to the output housing 113 or to be radially displaced relative to the first central axis 105 , the output shaft 131 can be more flexibly adjusted relative to the first central axis 105 within a range of 0 to R.

[0125] In some alternative embodiments, the first position and the second position of the output shaft 131 correspond to two different offset wedging states of the output shaft 131. In this case, it can be understood that when the output shaft 131 is in the first position and the second position, the electric drill 100 is in the second state. For such an embodiment, the output shaft 131 can be an accessory output shaft of an accessory product, and the output housing 113 is the housing of the accessory product, so that a plurality of offset wedging sizes can be achieved using one accessory product, and can be applied to a variety of wedging working conditions. The output shaft can be adjusted more flexibly within the range of 0 to R relative to the first center axis 105. Therefore, when the first position and the second position of the output shaft 131 correspond to two different wedging states, it is also applicable to products with accessories, which can also improve work efficiency.

[0126] In this embodiment, the first central axis 105 coincides with the second axis 102. In other alternative embodiments, the first central axis 105 and the second axis 102 are arranged parallel to each other but not coincident. In other alternative embodiments, the first central axis 105 and the second axis 102 are arranged at a certain angle.

[0127] Optionally, the output shaft 131 rotates about the third axis 103 relative to the output housing 113. Specifically, the output shaft 131 switches between a first position (as shown in FIG. 1 ) and a second position (as shown in FIG. 3 ) by rotating about the third axis 103. The third axis 103 is parallel to but offset from the first central axis 105. Optionally, the third axis 103 is positioned between the first position where the output shaft 131 is located and the second position where the output shaft 131 is located. Of course, in other alternative embodiments, switching between the first and second positions can be achieved through radial translation or rotational movement relative to another reference axis.

[0128] As shown in Figures 1 and 2, in the first state where the output axis 104 is substantially coaxial with the second axis 102, the radial distances between the output axis 104 and the outer edges of the output housing 113 in the same radial direction are L1 and L2, respectively, where the ratio L1 / L2 is greater than or equal to 0.4 and less than or equal to 1. In some embodiments, the ratio L1 / L2 is greater than or equal to 0.5 and less than or equal to 1. In some embodiments, the ratio L1 / L2 is greater than or equal to 0.6 and less than or equal to 1. In some embodiments, the ratio L1 / L2 is greater than or equal to 0.7 and less than or equal to 1. In some embodiments, the ratio L1 / L2 is greater than or equal to 0.8 and less than or equal to 1. Wherein, L1 is less than or equal to L2. In the embodiment of the present application, when the electric drill 100 is in the first state, the position of the output shaft 131 is substantially the same as that of a conventional electric drill or a rotary torque output tool. That is, when the electric drill 100 is in the first state, the electric drill 100 can maintain the usage habits and appearance of a conventional screwdriver. Since the output shaft 131 of a conventional electric drill (i.e., an electric drill 100 without the offset function) is substantially located at the center of the output housing 113, that is, when the output axis 104 is substantially coaxial with the second axis 102 in the first state, the output axis 104 is substantially coaxial with the first center axis 105. It is understood that when the output shaft 131 is in the first position, D1 is substantially 0. It is also understood that in some conventional electric drills, the ratio of the radial distances of the output axis from the outer edges of the output housing in the same radial direction, i.e., L1 / L2, is not equal to 1 or is not substantially coaxial. For such electric drills, products with an output shaft offset function have a ratio of L1 / L2 that is not equal to 1 when the output shaft is in the first position, for example, a ratio of L1 / L2 greater than or equal to 0.4 and less than 1.

[0129] In this embodiment, an output shaft 131 is movable relative to the output housing 113, allowing the output shaft 131 to be offset relative to the first central axis 105 of the output housing 113 or returned to the center of the output housing 113 or a position relatively close to the center. This allows the appearance and usage habits of conventional screwdrivers in the related art to be maintained. Furthermore, it reduces the wobble of the output shaft 131 in the first state.

[0130] In this embodiment, when the electric drill 100 is in the second state, as can be seen above, the output shaft 131 is radially displaced relative to the output housing 113 to the second position around the third axis 103 .

[0131] As shown in Figures 4 to 5A-5C, to achieve multi-directional biasing of the electric drill 100, in this embodiment, when the output shaft 131 is in the second position, the output shaft 131 rotates about the first central axis 105 relative to the drive housing 111. This allows the output shaft 131 to achieve multi-directional biasing. Optionally, the output housing 113 rotates about the first central axis 105 relative to the drive housing 111, and the output shaft 131 rotates synchronously with the output housing 113. Optionally, the output housing 113 can partially rotate about the first central axis 105 to drive the output shaft 131 to rotate synchronously. In this embodiment, since the output housing 113 can rotate about the first central axis 105, when the output shaft 131 is in the first position, the output shaft 131 can also be driven by the output housing 113 to rotate about the first central axis 105. In this embodiment, the second housing 112 and the output housing 113 do not move relative to each other, that is, the second housing 112 and the output housing 113 rotate synchronously. Optionally, the second housing 112 rotates relative to the drive housing 111 around the first central axis 105, and the output shaft 131 rotates synchronously with the second housing 112. Optionally, the second housing 112 can partially rotate around the first central axis 105 to drive the output shaft 131 to rotate synchronously. It should be explained that in this embodiment, the second housing 112 and the output housing 113 rotate synchronously or are integrally formed, but due to appearance requirements or other functional requirements, the geometric center of the output housing is not the same as the geometric center of the second housing. In some embodiments, the second housing 112 and the output housing 113 have the same shape, so the geometric centers of the two can be the same. In some embodiments, the handheld power tool may also include a structure for rotating to adjust the torque or output speed, but since the rotation of such a component will not change the relative position of the output axis with respect to the second axis, such a rotating component does not belong to the second housing part.

[0132] Because the output shaft 131 needs to be stably connected and driven when in operation, i.e., when outputting power, the electric drill 100 further includes a first locking portion 151 configured to maintain the output shaft 131 in the first position or the second position, and a second locking assembly 19 configured to selectively lock the output housing 113 from rotating relative to the drive housing 111. The specific structures of the first locking portion 151 and the second locking assembly 19 will be described in detail below.

[0133] As shown in Figures 7 to 11, the electric drill 100 also includes a clutch assembly 15, which is disposed between the drive shaft 141 and the output shaft 131. The clutch assembly 15 includes: a connected state in which the drive shaft 141 and the output shaft 131 transmit torque, and a disconnected state in which the drive shaft 141 and the output shaft 131 are disconnected from each other. When the clutch assembly 15 is in the disconnected state, the output shaft 131 is allowed to move in a direction perpendicular to the first axis 101. Optionally, when the clutch assembly 15 is in the disconnected state, the output shaft 131 is allowed to move radially relative to the output housing 113. The clutch assembly 15 is used to enable the output shaft 131 to switch between a first position and a second position, and after switching, power transmission from the motor to the output shaft 131 can be achieved in the first position and the second position, respectively. As shown in Figures 9 and 11, the output shaft is in the second position, and as shown in Figure 10, the output shaft is in the first position.

[0134] By setting the clutch assembly 15 in a disengaged state, the output shaft 131 can achieve radial displacement and thus realize the biasing function, while setting the connected state can ensure the power transmission path after the output shaft 131 undergoes radial displacement, thereby ensuring the use function of the electric drill 100.

[0135] The electric drill 100 also includes an output transmission assembly 18, disposed between the drive shaft 141 and the output shaft 131. As shown in FIG10 , the output transmission assembly 18 includes an input portion 18a connected to the drive shaft 141, and an output portion 18b connected to the output shaft 131. As shown in FIG10 and FIG11 , the output portion 18b includes a first transmission wheel 181 and a second transmission wheel 182. The output shaft 131 can selectively couple with either the first transmission wheel 181 or the second transmission wheel 182 to transmit power from the drive shaft 141 to the output shaft 131. By enabling the output shaft 131 to selectively couple with either the first transmission wheel 181 or the second transmission wheel 182, the output shaft 131 can achieve radial displacement, thereby achieving an offset function. Furthermore, after radial displacement of the output shaft 131, the power transmission path can be maintained, thereby ensuring the functional use of the electric drill 100.

[0136] In this embodiment, the output transmission assembly 18 is connected to the clutch assembly 15. It should be noted that the transmission shaft 141, the output transmission assembly 18, the clutch assembly 15, and the output shaft 131 may share some structures. Furthermore, the output transmission assembly 18 and the clutch assembly 15 may be selectively configured based on the actual needs of different products.

[0137] As shown in Figures 9 and 10, the clutch assembly 15 includes a first locking portion 151 and a reset portion 152. The first locking portion 151 is configured to maintain the output shaft 131 in the first position or the second position. The first locking portion 151 includes a first limiting portion 1511 corresponding to the first position and a second limiting portion 1512 corresponding to the second position. The output shaft 131 can be selectively connected to the first limiting portion 1511 or the second limiting portion 1512 at the corresponding position. Optionally, the first limiting portion 1511 corresponds to the output shaft 131 being in the first position, and the second limiting portion 1512 corresponds to the output shaft 131 being in the second position. The first limiting portion 1511 and the second limiting portion 1512 are formed or connected to the first mounting bracket 153. Optionally, the first limiting portion 1511 includes limiting teeth 154, and the second limiting portion 1512 includes limiting teeth 154 identical to those of the first limiting portion 1511. The rear end of the output shaft 131 is formed or connected with a limiting tooth groove 1311 that cooperates with the limiting tooth 154. When the output shaft 131 is connected to the first limiting portion 1511 or the second limiting portion 1512, the limiting tooth groove 1311 is connected to the limiting tooth 154 to limit the rotational movement of the output shaft 131 relative to the first limiting portion 1511 or the second limiting portion 1512. It can be understood that the positions of the limiting teeth and the limiting tooth grooves can be interchanged, which does not affect the substantive content of this application. In some embodiments, the matching of the output shaft and the limiting portion can also be completed by other mechanical matching structures to achieve circumferential limiting of the output shaft by the limiting portion. In some embodiments, the matching of the output shaft and the limiting portion can also be completed by electromagnetic means to achieve circumferential limiting of the output shaft by the limiting portion.

[0138] To enable the output shaft 131 to switch its position relative to the output housing 113, a first mounting portion 134 is formed on or connected to the output shaft 131. A first connecting portion 155 coaxial with the third axis 103 is provided on the first mounting bracket 153. To enable the output shaft 131 to switch between the first and second positions by rotating about the third axis 103, the first connecting portion 155 is connected to the first mounting bracket 153 via a first shaft 1552, which is coaxial with the third axis 103. Optionally, the first shaft 1552 is disposed within the output housing 113 and rotationally connects the first mounting portion 134 to the first mounting bracket 153, thereby rotationally connecting the output shaft 131 to the first limiting portion 1511 or the second limiting portion 1512, respectively. Optionally, the first shaft 1552 is connected between the first limiting portion 1511 and the second limiting portion 1512.

[0139] The reset portion 152 is configured to drive the clutch assembly 15 to switch from a disengaged state to a connected state. Optionally, when the output shaft 131 is separated from the first limiting portion 1511 or the second limiting portion 1512, the reset portion 152 applies a force that causes the output shaft 131 to approach the first limiting portion 1511 or the second limiting portion 1512. In this embodiment, the reset portion 152 includes a coil spring. Optionally, the reset portion 152 is a compression spring. Optionally, in order to provide a stable fixed reset portion 152, one end of the reset portion 152 is connected to the output shaft 131 and the other end is connected to the clutch assembly 15. Optionally, one end of the reset portion 152 is connected to the first mounting portion 134 and the other end is connected to the first mounting bracket 153. At the same time, in order to prevent the reset portion 152 from twisting, the reset portion 152 is sleeved on the first shaft 1552.

[0140] Taking the example of the output shaft 131 switching from the first position (as shown in FIG. 10 ) to the second position (as shown in FIG. 9 and FIG. 11 ), when the output shaft 131 is in the first position, the limiting tooth groove 1311 on the output shaft 131 engages with the limiting tooth 154 of the first limiting portion 1511, i.e., the output shaft 131 is retained within the first limiting portion 1511. At this time, the reset portion 152 is in a non-forced state, or applies a force toward the first limiting portion 1511 to the output shaft 131, thereby further stabilizing the axial fit between the output shaft 131 and the first limiting portion 1511. An external force is applied to the output shaft 131 away from the first limiting portion 1511. In this embodiment, an axial and forward force is applied to the output shaft 131 to disengage the output shaft 131 from the first limiting portion 1511. In this embodiment, for example, a user pulls the output shaft forward, at which point the reset portion 152 is compressed, storing energy. An external force causes the output shaft 131 to rotate about the third axis 103, thereby moving from the first position to the second position. The output shaft 131 moves to a position substantially aligned with the second stopper 1512. When the external force is removed, the reset unit 152 releases energy, driving the output shaft 131 toward the second stopper 1512. The output shaft 131 enters the second stopper 1512, where the stopper teeth 1311 engage with the stopper teeth 154 of the second stopper 1512. This completes the position shift of the output shaft 131.

[0141] In this embodiment, as shown in FIG10 , a displacement limiting groove 1132 is provided on the output housing 113 . The limiting groove 1132 is configured to indicate a first position and a second position of the output shaft 131 , so that the output shaft 131 can be more accurately aligned with the first limiting portion 1511 or the second limiting portion 1512 .

[0142] As shown in FIG. 9 , the first mounting portion 134 includes a bearing seat 1341 for accommodating the first bearing 115 . The first mounting portion 134 is received in the receiving portion 1131 by the output housing 113 .

[0143] The first transmission wheel 181 of the output transmission assembly 18 is in driving connection with the first stopper 1511, and the second transmission wheel 182 is in driving connection with the second stopper 1512. Optionally, the axle of the first transmission wheel 181 drives the first stopper 1511, and the axle of the second transmission wheel 182 drives the second stopper 1512. Optionally, when the output shaft 131 is in the first position, the output shaft 131 is coupled to the first transmission wheel 181. Optionally, when the output shaft 131 is in the second position, the output shaft 131 is coupled to the second transmission wheel 182.

[0144] In this embodiment, because the output axis 104 is substantially coaxial with the second axis 102 when the output shaft 131 is in the first position, the first transmission wheel 181 is coaxially coupled to the transmission shaft 141. Alternatively, the transmission shaft 141 directly drives the first transmission wheel 181, that is, the transmission shaft 141 serves as the axle for the first transmission wheel 181. The axis 181a of the first transmission wheel 181 corresponds to the second axis 102. Optionally, the output transmission assembly 18 includes a wheel carrier 184 configured to support the transmission wheel. In this embodiment, the wheel carrier 184 is provided with an axle in the form of a cantilever beam. Axle holes 1841 are provided at corresponding positions of the first transmission wheel 181, allowing the transmission shaft 141 to pass through the wheel carrier 184 and connect to the first transmission wheel 181. In other alternative embodiments, the first transmission wheel 181 is connected to the wheel carrier 184 via an axle, which is then connected to the transmission shaft 141. The second transmission wheel 182 is connected to the wheel frame 184 via its axle 1842. The first transmission wheel 181 and the second transmission wheel 182 are respectively disposed on a first plane 1844 of the wheel frame 184. The axis 181a of the first transmission wheel 181 and the axis 182a of the second transmission wheel 182 are arranged substantially parallel to each other, and the first and second transmission wheels 181 and 182 rotate in the same direction. This ensures that the output shaft 131 rotates in the same direction in the first and second positions. Therefore, the output portion 18b further includes a third transmission wheel 183, which is in driving connection with the first and second transmission wheels 181 and 182, respectively.

[0145] When the motor 12 drives the drive shaft 121 to start rotating, the drive shaft 141 of the transmission mechanism 14 drives the first transmission wheel 181. The first transmission wheel 181 drives the second transmission wheel 182 via the third transmission wheel 183, and the second transmission wheel 182 moves in the same direction as the first transmission wheel 181. In this embodiment, the first transmission wheel 181, the third transmission wheel 183, and the second transmission wheel 182 are respectively cylindrical gears and are externally meshed. Optionally, the first transmission wheel 181, the third transmission wheel 183, and the second transmission wheel 182 are respectively connected by transmission with a transmission ratio of 1:1. Optionally, the transmission ratio of the first transmission wheel 181 to the third transmission wheel 183 is less than 1, and the transmission ratio of the third transmission wheel to the second transmission wheel is greater than 1, ensuring that the rotational speeds of the first transmission wheel 181 and the second transmission wheel 182 are substantially the same. That is, the first transmission wheel 181 and the second transmission wheel 182 are connected by transmission with a transmission ratio of 1:1.

[0146] In this embodiment, the axle 1843 of the third transmission wheel 183 is parallel to but not coincident with the third axis 103. In other alternative embodiments, the axle 1843 of the third transmission wheel 183 is coaxial with the third axis 103.

[0147] As shown in Figures 7 to 9, the output transmission assembly 18 and the clutch assembly 15 are at least partially housed in the second housing 112. The second housing 112 rotates relative to the drive housing 111, and the relative position of the output axis 104 relative to the second axis 102 is adjusted by rotating the second housing 112. In this embodiment, the axial length L from the rear end of the second housing 112 to the end face where the output shaft 131 extends is less than or equal to 56 mm. Because the clutch assembly 15 and the single-layer gear assembly are used in this embodiment to achieve the position switching of the output shaft 131 and ensure the transmission path, the present application achieves a compact structural length of the offset functional portion of the output shaft 131. Compared with the structure of the related art that uses two-stage or multi-stage offset gear transmission. The axial dimension is small and the product structure is compact. In some embodiments, the axial length L from the rear end of the second housing 112 to the end face where the output shaft 131 extends is less than or equal to 50 mm. In some embodiments, the axial length L from the rear end of the second housing 112 to the end surface where the output shaft 131 extends is less than or equal to 51 mm, 52 mm, 53 mm, 54 mm, or 55 mm. In some embodiments, the axial length L from the rear end of the second housing 112 to the end surface where the output shaft 131 extends is less than or equal to 50 mm. In some embodiments, the axial length L from the rear end of the second housing 112 to the end surface where the output shaft 131 extends is less than or equal to 45 mm. In some embodiments, the axial length L from the rear end of the second housing 112 to the end surface where the output shaft 131 extends is less than or equal to 40 mm. In some embodiments, the axial length L from the rear end of the second housing 112 to the end surface where the output shaft 131 extends is less than or equal to 35 mm. In some embodiments, the axial length L from the rear end of the second housing 112 to the end surface where the output shaft 131 extends is less than or equal to 30 mm. In some embodiments, the axial length L from the rear end of the second housing 112 to the end surface where the output shaft 131 extends is less than or equal to 25 mm.

[0148] In this embodiment, the output drive assembly 18 and the clutch assembly 15 are at least partially housed within the output housing 113. When the output housing 113 rotates about the first central axis 105, the output drive assembly 18 and the clutch assembly 15 rotate at least partially with the output housing 113. Optionally, the first transmission wheel 181 is coaxially connected to the transmission shaft 141. When the output housing 113 rotates, the output shaft 131 rotates about the first central axis 105 relative to the drive housing 111, while the second transmission wheel 182 and the third transmission wheel 183 rotate about the first central axis 105 relative to the drive housing 111. In some embodiments, the output housing is part of the second housing due to design or other requirements. In some embodiments, when the second housing is integrally formed and serves as the output housing, the axial length L of the output housing 113 is less than or equal to 56 mm. In some embodiments, the axial length L of the output housing 113 is less than or equal to 50 mm. In some embodiments, the axial length L of the output housing 113 is less than or equal to 51 mm, 52 mm, 53 mm, 54 mm, or 55 mm. In some embodiments, the axial length L of the output housing 113 is less than or equal to 45 mm. In some embodiments, the axial length L of the output housing 113 is less than or equal to 40 mm. In some embodiments, the axial length L of the output housing 113 is less than or equal to 35 mm. In some embodiments, the axial length L of the output housing 113 is less than or equal to 30 mm. In some embodiments, the axial length L of the output housing 113 is less than or equal to 25 mm.

[0149] In some alternative embodiments, the output drive assembly 18 and clutch assembly 15, or portions thereof, are configured as detachable accessory components to enable multiple offset sizes for a single accessory. The second housing, the output housing, or both the second housing and the output housing serve as the accessory's housing, or the second housing, the output housing, or both the second housing and the output housing serve as portions of the accessory's housing. In such embodiments, the axial length L from the rear end of the second housing to the end surface where the output shaft extends is less than or equal to 56 mm. In some embodiments, the axial length L from the rear end of the second housing to the end surface where the output shaft extends is less than or equal to 50 mm. In some embodiments, the axial length L from the rear end of the second housing to the end surface where the output shaft extends is less than or equal to 51 mm, 52 mm, 53 mm, 54 mm, or 55 mm. In some embodiments, the axial length L from the rear end of the second housing to the end surface where the output shaft extends is less than or equal to 50 mm. In some embodiments, the axial length L from the rear end of the second housing to the end surface where the output shaft extends is less than or equal to 45 mm. In some embodiments, the axial length L from the rear end of the second housing to the end surface where the output shaft extends is less than or equal to 40 mm. In some embodiments, the axial length L from the rear end of the second housing to the end surface where the output shaft extends is less than or equal to 35 mm. In some embodiments, the axial length L from the rear end of the second housing to the end surface where the output shaft extends is less than or equal to 30 mm. In some embodiments, the axial length L from the rear end of the second housing to the end surface where the output shaft extends is less than or equal to 25 mm.

[0150] As shown in Figure 11, the second locking assembly 19 includes a locking ring gear 191 and a sliding portion 192. One end of the sliding portion 192 is formed or connected to an operating member 193. The operating member 193 is at least partially located on the visible surface and is configured to be activated. In this embodiment, the operating member 193 is disposed on the drive housing 111. When the second locking assembly 19 locks the rotation of the second housing 112 relative to the drive housing 111, the sliding portion 192 cooperates with the teeth on the locking ring gear 191 to limit the rotation of the second housing 112. Optionally, the sliding portion 192 is connected to the drive housing 111, and the locking ring gear 191 is disposed on the output housing 113, and the locking ring gear 191 rotates with the output housing 113. Optionally, the locking ring gear 191 includes multiple teeth 1911, so that the output housing 113 includes multiple locking positions, so that the electric drill 100 can be biased in multiple directions. This allows for more diverse applicable working conditions. An external force drives sliding portion 192, separating it from teeth 1911 of locking ring gear 191, allowing the user to rotate output housing 113. After the external force is removed, sliding portion 192, driven by driving portion 194, slides until it mates with teeth 1911, or drives locking ring gear 191 to rotate until the teeth 1911 closest to sliding portion 192 mate with sliding portion 192. The application of driving force by driving portion 194 further stabilizes the engagement between sliding portion 192 and teeth 1911, providing sufficient locking force. Optionally, driving portion 194 is a spring.

[0151] In some alternative embodiments, the operating member 193 may not be provided, and the sliding portion 192 is driven to move by rotating the output housing 113 to disengage the sliding portion 192 from the locking gear ring 191 , thereby completing the rotational movement of the output housing 113 .

[0152] As shown in Figures 13A to 16, an electric drill according to another embodiment of the present application is shown, in which features and elements corresponding to those of the electric drill 100 are given similar figure marks followed by the letter "B", and the figure marks of the same features are consistent. The following description mainly focuses on the differences between the embodiments.

[0153] The handheld power tool, referring to FIG7 , comprises: a motor 12 including a drive shaft 121 rotating around a first axis 101 , a drive housing 111 accommodating at least the motor 12 ; an output shaft 131 including an output axis 104 defined by itself, the output shaft 131 rotating around the output axis 104 to output power.

[0154] As shown in Figures 13A to 14 , the handheld power tool further includes an output housing 113B for supporting the rotation of an output shaft 131. The output housing 113B is configured with a first central axis 105B passing through its geometric center. The output shaft 131 includes a first position where the output axis 104 is radially spaced D1 from the first central axis 105B, and a second position where the output axis 104 is radially spaced D2 from the first central axis 105B. The output shaft 131 moves relative to the output housing 113B to radially offset the output shaft 131 relative to the first central axis 105B. It can be understood that each movement of the output shaft 131 relative to the output housing 113B is configured with a stop point, each stop point being offset radially from the other stop points along the first central axis 105B. The relative movement of the output shaft 131 relative to the output housing 113B enables the electric drill 100 to achieve a first state (the "centered" state of the output shaft 131) and a second state (the "offset" state of the output shaft 131). The output shaft 131 moves radially relative to the output housing 113B along the first central axis 105B. Specifically, the output shaft 131 has a first position, as shown in Figures 13A and 13B , and a second position, as shown in Figure 14 . In the first position, the radial distance D1 between the output axis 104 and the first central axis 105B is . In the second position, the radial distance D2 between the output axis 104 and the first central axis 105B is . D1 is smaller than D2.

[0155] In this embodiment, when the output shaft 131 is in the first position, the output axis 104 is substantially coaxial with the second axis 102 . When the output shaft 131 is in the second position, the output axis 104 is radially offset from the second axis 102 .

[0156] In some alternative embodiments, the first position and the second position of the output shaft 131 correspond to two different offset, flush-fitting states of the output shaft 131. In this case, it can be understood that when the output shaft 131 is in the first position and the second position, the electric drill 100 is in the second state (the offset, "flush-fitting" state of the output shaft 131).

[0157] As shown in Figures 15 and 16 , the handheld power tool further includes an output transmission assembly 18B disposed between the drive shaft and the output shaft 131. In this embodiment, a transmission mechanism 14 is disposed between the drive shaft and the output shaft of the handheld power tool, and the transmission mechanism 14 is equipped with a transmission shaft 141. The output transmission assembly 18B is disposed between the transmission shaft 141 and the output shaft 131. In alternative embodiments, the drive shaft directly drives the output shaft, and the output transmission assembly 18B may alternatively be disposed between the drive shaft and the output shaft.

[0158] In this embodiment, the output transmission assembly 18B includes an input portion 181B for power input. Exemplarily, the input portion 181B is connected to the transmission shaft 141. The output transmission assembly 18B also includes an output portion 182B connected to the output shaft 131. A first intermediate gear 185B is rotatably connected to the output shaft 131. The output shaft 131 rotates relative to the first intermediate gear 185B about the output axis 104. The first intermediate gear 185B is driven to rotate about the third axis 103, causing the output shaft 131 to rotate about the third axis 103. In this embodiment, the output axis 104 is offset from the third axis 103.

[0159] The output shaft 131 switches between the first position and the second position by rotating about the third axis 103. Optionally, the output shaft 131 rotates about the third axis 103 relative to the output housing 113B to switch between the first state and the second state, and the output shaft 131 rotates about the output axis 104 relative to the output housing 113B to achieve power output.

[0160] The output transmission assembly 18B includes a transmission housing 186B, which houses at least a portion of the first intermediate gear 185B. Rotating the transmission housing 186B drives the first intermediate gear 185B to rotate about the third axis 103. Exemplarily, the transmission housing 186B is connected to the output housing 113B, and the transmission housing 186B rotates relative to the output housing 113B to drive the first intermediate gear 185B. In this embodiment, to ensure a consistent and compact appearance, the transmission housing 186B is coaxial with the output housing 113B. In some embodiments, the rotation axis of the transmission housing 186B is parallel to, but does not overlap, the output axis 104. In some embodiments, the rotation axis of the transmission housing 186B intersects the output axis 104.

[0161] Exemplarily, the first intermediate gear 185B includes a sector gear that is driven to swing back and forth about the third axis 103, thereby driving the output shaft 131 to switch between the first position and the second position. Optionally, the sector gear is an external gear. The transmission housing 186B is circumferentially provided with first internal teeth 1861B. In this embodiment, the first internal teeth 1861B are connected to the external teeth of the first intermediate gear 185B via an idler gear 187B. The idler gear 187B is provided between the first internal teeth 1861B and the first intermediate gear 185B, and the idler gear 187B rotates about the idler gear 187B axis. Optionally, the transmission housing 186B rotates in the first direction, the first internal teeth 1861B drive the idler gear 187B to rotate in the first direction, and the idler gear 187B engages with the external teeth of the first intermediate gear 185B, driving the first intermediate gear 185B to rotate in the second direction. The idler gear 187B is added to the transmission path between the transmission housing 186B and the first intermediate gear 185B to make the user's operation feel smoother.

[0162] Regarding the power transmission from the transmission shaft 141 to the output shaft 131. The input part 181B includes a driving wheel 1811B, which is an external gear. The output part 182B includes a driven wheel 1821B, which is an external gear. The output part 182B is arranged coaxially with the output shaft 131, that is, the output part 182B rotates around the output axis 104. A second intermediate gear 188B is arranged between the input part 181B and the output part 182B to achieve the same direction of rotation of the output part 182B and the transmission shaft 141. In this embodiment, the second intermediate gear 188B rotates around the third axis 103. In other words, the first intermediate gear 185B and the second intermediate gear 188B are arranged coaxially to ensure the compactness of the product. The second intermediate gear 188B is an external gear, and the input part 181B is externally meshed with the second intermediate gear 188B, and the second intermediate gear 188B is externally meshed with the output part 182B. The output portion 182B is driven by the first intermediate gear 185B to rotate along the outer circumference of the second intermediate gear 188B around the third axis 103. That is, when the output shaft 131 switches between the first position and the second position, the output portion 182B remains in meshing engagement with the second intermediate gear 188B.

[0163] The output housing 113B is provided with a displacement limiting slot 1132B, which is used to indicate the first and second positions of the output shaft 131. Exemplarily, the displacement limiting slot 1132B limits the displacement endpoints of the output shaft 131. Exemplarily, the displacement limiting slot 1132B limits the relative displacement of the transmission housing 186B and the first intermediate gear 185B, preventing the transmission housing 186B from disengaging from the meshing state of the rack of the first intermediate gear 185B.

[0164] As shown in Figures 17 to 20, the electric drill of the third embodiment of the present application is provided, wherein the features and elements corresponding to those of the electric drill 100 are given similar figure marks followed by the letter "C", and the same features use the figure marks in the first embodiment. The following description mainly focuses on the differences between the third embodiment and the first embodiment.

[0165] Referring to FIG. 7 , the handheld power tool includes a motor 12 including a drive shaft 121 rotating about a first axis 101 ; and a drive housing 111 accommodating at least the motor 12 .

[0166] As shown in FIG17 , the drive housing 111 further includes an output shaft 131C, which includes an output axis 104C defined by itself. The output shaft 131C rotates about the output axis 104C to output power. An output housing 113C is configured to support the rotation of the output shaft 131C. The output housing 113C defines a first central axis 105C passing through the geometric center. The output axis 104C is offset from the first central axis 105C. The output housing 113C rotates about the first central axis 105C relative to the drive housing 111, thereby causing the output shaft 131C to rotate about the first central axis 105C relative to the drive housing 111.

[0167] Output shaft 131C rotates about first central axis 105C to switch between a first position and a second position. When output shaft 131C is in the first position, a radial distance D1 is between output axis 104C and first axis 101. When output shaft 131C is in the second position, a radial distance D1 is between output axis 104C and first axis 101. D1 is less than D2. In this embodiment, when the output shaft 131C is in the first position, the output axis 104C is basically coaxial with the first axis 101. When the output shaft 131C is in the second position, the output axis 104C is radially offset from the first axis 101. The output axis 104C and the first center axis 105C of the rotating center axis are offset so that the output shaft 131C can switch between the first state of the output shaft 131C in which the output axis 104C is basically coaxial with the first axis 101 (the "center" state of the output shaft 131C) and the second state in which the output axis 104C is offset from the first axis 101 (the "edge" state in which the output shaft 131C is offset), thereby realizing edge-fitting operation.

[0168] In some alternative embodiments, the first and second positions of the output shaft 131C correspond to two different offset, flush-fitting states of the output shaft 131C. In this case, it can be understood that the electric drill 100 is in the second state (the offset, "flush-fitting" state) when the output shaft 131C is in the first position and when the output shaft 131C is in the second position.

[0169] In some embodiments, referring to FIG. 7 , the handheld power tool further includes a transmission mechanism 14 for connecting to the drive shaft 121 . The transmission mechanism 14 is configured as a transmission shaft 141 which defines a second axis 102 .

[0170] Output shaft 131C rotates about first central axis 105C to switch between a first position and a second position. When output shaft 131C is in the first position, a radial distance D1 separates output axis 104C from second axis 102. When output shaft 131C is in the second position, a radial distance D1 separates output axis 104C from second axis 102. D1 is less than D2. In this embodiment, when output shaft 131C is in the first position, output axis 104C and second axis 102 are substantially coaxial. When output shaft 131C is in the second position, output axis 104C is radially offset from second axis 102. By offsetting the output axis 104C from the first center axis 105C of the rotational axis, the output shaft 131C can switch between a first state (a "centered" state) in which the output axis 104C is substantially coaxial with the second axis 102 and a second state (a "close-to-the-edge" state in which the output axis 104C is offset from the first axis 101) to achieve close-to-edge operation. In this embodiment, the first center axis 105C is offset from the second axis 102.

[0171] In some alternative embodiments, the first and second positions of the output shaft 131C correspond to two different offset, flush-fitting states of the output shaft 131C. In this case, it can be understood that the electric drill 100 is in the second state (the offset, "flush-fitting" state) when the output shaft 131C is in the first position and when the output shaft 131C is in the second position.

[0172] In this embodiment, the second axis 102 coincides with the first axis 101. In some embodiments, the second axis 102 is parallel to but not coincident with the first axis 101. In some embodiments, the second axis 102 intersects with the first axis 101. In some embodiments, if the drive shaft 121 directly drives the output shaft 131C, the "center" state of the output shaft 131C and the offset "edge" state of the output shaft 131C are respectively relative to the drive shaft 121. In some embodiments, the drive shaft 121 does not directly drive the output shaft 131C. The power of the drive shaft 121 is transmitted to the output shaft 131C through the transmission mechanism 14. In other words, the power output end of the output shaft 131C is the transmission shaft 141, and thus the "center" state of the output shaft 131C and the offset "edge" state of the output shaft 131C are respectively relative to the transmission shaft 141.

[0173] In this embodiment, as shown in Figures 19 and 20, an output transmission assembly 18C is further included, which is disposed between the transmission shaft 141 and the output shaft 131C. The output transmission assembly 18C includes an input portion 181C for inputting power, and an output portion 182C connected to the output shaft 131C. For example, the input portion 181C is connected to the transmission shaft 141. When the output shaft 131C is in the second position, the output portion 182C is offset from the input portion 181C. In this embodiment, when the output shaft 131C is in the first position, the output axis 104C is substantially coaxial with the second axis 102, and the output portion 182C is substantially coaxial with the input portion 181C.

[0174] In this embodiment, the output transmission assembly 18C further includes a first inner ring gear 185C, with the input portion 181C and the output portion 182C respectively meshing with the first inner ring gear 185C. The output transmission assembly 18C includes a transmission housing 186C, which is rotatably connected to the output housing 113C, and the first inner ring gear 185C is at least partially disposed within the transmission housing 186C. Regarding the power transmission from the transmission shaft 141 to the output shaft 131C, the input portion 181C includes a driving wheel 1811C, which is an external gear. The output portion 182C includes a driven wheel, which is an external gear. The output portion 182C is coaxially arranged with the output shaft 131C, that is, the output portion 182C rotates about the output axis 104C. The driving wheel 1811C drives the first inner ring gear 185C to rotate, thereby driving the output portion 182C to rotate. Exemplarily, a bearing 188C is disposed outside the inner ring gear, supporting the rotation of the first inner ring gear 185C. Optionally, the bearing 188C is supported within the transmission housing 186C. In this embodiment, the transmission shaft 141 drives the first inner ring gear 185C to rotate via the driving pulley 1811C. The output portion 182C meshes with the first inner ring gear 185C, which in turn drives the output portion 182C to rotate. The output portion 182C then drives the output shaft 131C to rotate about the output axis 104C relative to the output housing 113C, generating torque output.

[0175] In this embodiment, the central axis of the first inner ring gear 185C is substantially coaxial with the first central axis 105C. When the output shaft 131C switches between the first position and the second position, the output portion 182C rotates about the first central axis 105C along the internal teeth of the first inner ring gear 185C. Exemplarily, when the output shaft 131C switches between the first position and the second position, the first inner ring gear 185C does not rotate, and the output portion 182C remains meshed with the first inner ring gear 185C.

[0176] In this embodiment, the output housing 113C is provided with a receiving portion 1131C. The output shaft 131C is provided with a first bearing 115C for supporting the output shaft 131C to rotate about the output axis 104C. Exemplarily, two first bearings 115C are provided and are arranged in front of the output portion 182C.

[0177] The above shows and describes the basic principles, main features and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of this application.

Claims

1. A handheld power tool comprising: a motor including a drive shaft that rotates about a first axis; A driving housing, accommodating at least the motor; An output shaft, comprising an output axis defined by itself, the output shaft rotating around the output axis to output power; an output housing configured to support the rotation of the output shaft, the output housing defining a first central axis passing through a geometric center; the first central axis being at a radial distance R from an outer edge of the output housing; and The output shaft includes a first position and a second position; wherein, when the output shaft is in the first position, the radial distance between the output axis and the first center axis is D1; ​​when the output shaft is in the second position, the radial distance between the output axis and the first center axis is D2, D1 is less than D2, D1 is greater than or equal to 0 and less than R, and D2 is greater than 0 and less than or equal to R.

2. The handheld power tool according to claim 1, wherein: The output housing rotates relative to the drive housing about a first central axis.

3. The handheld power tool according to claim 1, wherein: When the output shaft is in the second position, the output shaft rotates relative to the drive housing about the first center axis. 4 . The handheld power tool according to claim 1 , further comprising a first locking portion configured to hold the output shaft in the first position or the second position.

5. The handheld power tool according to claim 1, wherein: When the output shaft is in a first position, the output shaft rotates relative to the drive housing about the first center axis.

6. The handheld power tool according to claim 1, wherein: The output shaft is formed or connected with a clamping portion connected to a working component, and the working component is configured to achieve the function of the handheld power tool. 7 . The handheld power tool according to claim 1 , further comprising a first bearing supporting the output shaft to rotate around an output axis, the output housing being provided with a receiving portion configured to receive the first bearing.

8. The handheld power tool according to claim 2, further comprising a second locking assembly configured to selectively lock the rotation of the output housing relative to the drive housing.

9. The handheld power tool according to claim 1, wherein: The output shaft rotates relative to the output housing about a third axis to switch between the first position and the second position, and the third axis is eccentrically disposed with respect to the first central axis.

10. The handheld power tool according to claim 1 further includes a transmission mechanism configured to connect the drive shaft and the output shaft, the transmission mechanism is configured with a transmission shaft which itself defines a second axis, the transmission shaft drives the output shaft, and when the output shaft is located in the first position or the second position, the output axis radially deviates from the second axis.

11. The handheld power tool according to claim 10 further includes a second shell, which rotates relative to the drive shell; when the output axis and the second axis are in an offset state where they are radially offset, the second shell is rotated to adjust the relative position of the output axis with respect to the second axis; the length from the rear end of the second shell to the end face of the output shaft extending out of the second shell is less than or equal to 56 mm.

12. The handheld power tool according to claim 10, wherein: The working states of the handheld power tool include: a first state in which the output axis is substantially coaxial with the second axis and a second state in which the output axis is radially offset from the second axis; when the handheld power tool is in the first state, the output axis is substantially coaxial with the first center axis.

13. The handheld power tool according to claim 10, further comprising a clutch assembly, wherein the clutch assembly is connected between the transmission shaft and the output shaft, and the clutch assembly can selectively connect the transmission shaft with the output shaft in the first position, or the transmission shaft with the output shaft in the second position.

14. The handheld power tool according to claim 13, wherein: The clutch assembly includes: a connection state in which the transmission shaft and the output shaft transmit torque, and a separation state in which the transmission shaft and the output shaft are disengaged from each other. When the clutch assembly is in the separation state, the output shaft is configured to move in a direction perpendicular to the first axis.

15. The handheld power tool according to claim 14, wherein: When the clutch assembly is in a disengaged state, the output shaft switches between the first position and the second position.

16. A handheld power tool comprising: a motor including a drive shaft that rotates about a first axis; A driving housing, accommodating at least the motor; An output shaft, comprising an output axis defined by itself, wherein the output shaft rotates around the output axis to output power; an output housing configured to support rotation of the output shaft, the output housing defining a first central axis passing through a geometric center; and The output shaft includes a first position and a second position; wherein, when the output shaft is in the first position, the radial distance between the output axis and the first center axis is D1; ​​when the output shaft is in the second position, the radial distance between the output axis and the first center axis is D2, and D1 is not equal to D2.

17. A handheld power tool comprising: a motor including a drive shaft that rotates about a first axis; A driving housing, accommodating at least the motor; An output shaft, comprising an output axis defined by itself, wherein the output shaft rotates around the output axis to output power; as well as An output housing is configured to support the rotation of the output shaft, the output housing defining a first central axis passing through a geometric center; wherein the output shaft moves relative to the output housing to radially offset the output axis relative to the first central axis.

18. The handheld power tool according to claim 17, wherein: The output shaft rotates relative to the output housing about a third axis, and the third axis is eccentrically disposed with respect to the first central axis.

19. The handheld power tool according to claim 17, wherein: The output shaft is formed or connected with a clamping portion connected to a working component, and the working component is configured to achieve the function of the handheld power tool. 20 . The handheld power tool according to claim 17 , further comprising a first bearing supporting the output shaft to rotate around an output axis, the output housing being provided with a receiving portion configured to receive the first bearing.

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