Handheld power tools

Abstract

A handheld power tool includes: an output shaft including a self-defined output axis; an output housing defining a first central axis passing through a geometric center; a radial distance R between the first central axis and the outer edge of the output housing; 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 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, where 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.

Description

[0001] This application is a divisional application of the application filed on December 3, 2024, with national application number 202480055853.7 and invention title "Handheld Power Tool". Technical Field

[0002] This application relates to the field of power tools, such as a handheld power tool. Background Technology

[0003] In related technologies, handheld power tools are widely used in daily life due to their convenience and high output efficiency. When using handheld power tools, situations often arise where there are obstacles on one side, such as the junction of a wall and floor, the interior of a cabinet, or other situations requiring the output shaft to be offset. In related technologies, handheld power tools, especially fastening tools, generally have the output shaft located in a relatively central position to ensure the stability of the torque output process. However, when encountering situations requiring close contact with edges, the machine needs to be tilted for operation, which can easily lead to the scrapping of fasteners or damage to the workpiece.

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

[0005] This application can solve or at least alleviate some or all of the above-mentioned problems. Therefore, this application provides a handheld power tool that can achieve output shaft bias.

[0006] A handheld power tool includes: a motor including a drive shaft that rotates about a first axis; a drive housing housing at least the motor; an output shaft including a self-defined output axis, 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 the outer edge of the output housing; 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 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 about a first central axis relative to the drive housing.

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

[0009] In some embodiments, a first locking element is further included, configured to hold the output shaft in a first position or a second position.

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

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

[0012] In some embodiments, a first bearing supporting the output shaft to rotate about the output axis is further included, and the output housing is provided with a receiving portion configured to receive the first bearing.

[0013] In some embodiments, a second locking component is also included, configured to selectively lock the rotation of the output housing 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 a first position and a second position, the third axis being eccentrically positioned relative 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 defines a second axis. The transmission shaft drives the output shaft. When the output shaft is in a first position or a second position, the output axis is radially deviated from the second axis.

[0016] In some embodiments, a second housing is further included, which rotates relative to the drive housing; when in an offset state where the output shaft is radially offset from the second axis, the relative position of the output shaft with respect to the second axis is adjusted by rotating the second housing; the length from the rear end of the second housing to the end face of the output shaft extending 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 drive shaft and the output shaft. The clutch assembly may selectively connect the drive shaft to the output shaft in a first position or the drive shaft to the output shaft in a second position.

[0019] In some embodiments, the clutch assembly includes a connected state for torque transmission between the drive shaft and the output shaft and a disengaged state for disengagement of the drive shaft from the output shaft. When the clutch assembly is in the disengaged 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 a disengaged state, the output shaft switches between a first position and a second position.

[0021] One embodiment of this application provides a handheld power tool, comprising: a motor including a drive shaft that rotates about a first axis; a drive housing that at least houses the motor; an output shaft including a self-defined output axis that rotates 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; 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 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, where D1 is not equal to D2.

[0022] One embodiment of this application provides a handheld power tool, including: a motor including a drive shaft that rotates about a first axis; a drive housing that at least houses the motor; an output shaft including a self-defined output axis that rotates about the output axis to output power; and 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; wherein the output shaft moves relative to the output housing to cause the output axis to be radially offset relative to the first central axis.

[0023] In some embodiments, the output shaft rotates relative to the output housing about a third axis, which is eccentrically positioned relative to the first central axis.

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

[0025] In some embodiments, a first bearing supporting the output shaft to rotate about the output axis is further included, and the output housing is provided with a receiving portion configured to receive the first bearing.

[0026] One embodiment of this application provides a handheld power tool, comprising: a motor including a drive shaft that rotates about a first axis; a drive housing configured to at least house the motor; an output shaft including a self-defined output axis that rotates about the output axis to output power; a transmission mechanism connected to the drive shaft, the transmission mechanism being configured with a drive shaft that drives the output shaft, the drive shaft itself defining a second axis that rotates about the second axis; and 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 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; 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, which is eccentrically positioned relative to the first central axis.

[0028] In some embodiments, the output shaft includes: a first position where the output axis is radially distanced from the first central axis by a distance of D1, and a second position where the output axis is radially distanced from the first central axis by a distance of D2.

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

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

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

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

[0033] In some embodiments, a first bearing supporting the output shaft to rotate about the output axis is further included, and the output housing is provided with a receiving portion configured to mount the first bearing.

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

[0035] One embodiment of this application provides a handheld power tool, comprising: a motor including a drive shaft that rotates about a first axis; a drive housing configured to at least house the motor; an output shaft including a self-defined output axis that rotates about the output axis to output power; a transmission mechanism configured to connect the drive shaft and the output shaft, the transmission mechanism being configured with a transmission shaft connected to the output shaft, the transmission shaft itself defining a second axis that rotates about the second axis; and 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 includes: a first state in which the output axis and the second axis are substantially coaxial, and a second state in which the output axis and the second axis are radially offset; 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, 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 0.6 and less than or equal to 1.

[0037] In some embodiments, 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 0.8 and less than or equal to 1.

[0038] One embodiment of this application provides a handheld power tool, including: a motor, including a drive shaft that rotates about a first axis; a drive housing configured to at least house the motor; an output shaft, including a self-defined output axis, 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 configured with a transmission shaft connected to the output shaft; and a clutch assembly disposed between the transmission shaft and the output shaft; the clutch assembly includes: a connected state for torque transmission between the transmission shaft and the output shaft and a disengaged state for disengagement of transmission between the transmission shaft and the output shaft, wherein when the clutch assembly is in the disengaged state, the output shaft is configured to move in a direction perpendicular to the first axis.

[0039] In some embodiments, the device further includes: an output housing configured to support rotation of the output shaft, the output housing defining a first central axis passing through a geometric center; the output shaft including: a first position with a radial distance D1 between the output axis and the first central axis and a second position with a radial distance D2 between the output axis and the first central axis.

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

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

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

[0043] In some embodiments, the clutch assembly further includes a reset section configured to drive the clutch assembly to switch from a disengaged state to a engaged state.

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

[0045] In some embodiments, a first bearing supporting the output shaft to rotate about the output axis is further included, 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, which is offset from the first central axis.

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

[0048] One embodiment of this application provides a handheld power tool, comprising: a motor including a drive shaft that rotates about a first axis; a drive housing configured to at least house the motor; an output shaft including a self-defined output axis, the output shaft rotating about the output axis to output power; a transmission mechanism configured to connect to the drive shaft, the transmission mechanism configuring the drive shaft; and 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 and an output portion connected to the output shaft; the output portion includes a first transmission wheel and a second transmission wheel, the output shaft selectively coupled to either the first transmission wheel or the second transmission wheel to transmit power from the drive shaft to the output shaft.

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

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

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

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

[0054] In some embodiments, a first bearing supporting the output shaft to rotate about the output axis is further included, and the output housing is provided with a receiving portion configured to receive the first bearing.

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

[0056] In some embodiments, the output shaft rotates relative to the output housing about a third axis, which is eccentrically positioned relative to the first central axis.

[0057] In some embodiments, the axes of at least one of the first and second drive wheels are offset from the first central axis. When the output housing rotates relative to the drive housing about the first central axis, the offset drive wheel rotates relative to the drive housing about the first central axis.

[0058] One embodiment of this application provides a handheld power tool, comprising: a motor including a drive shaft that rotates about a first axis; a drive housing configured to at least house the motor; an output shaft including a self-defined output axis that rotates about the output axis to output power; a transmission mechanism configured to connect the drive shaft and the output shaft, the transmission mechanism having a drive shaft that drives the output shaft, the drive shaft itself defining a second axis that rotates about the second axis; and a second housing that rotates relative to the drive housing. The handheld power tool includes: an offset state in which the output axis is radially offset from the second axis; the ability to adjust the relative position of the output axis with respect to the second axis by rotating the second housing; and a length from the rear end of the second housing to the end face of the output shaft extending out of the second housing that is less than or equal to 56 mm.

[0059] In some embodiments, the length from the rear end of the second housing to the end face 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, a first bearing supporting the output shaft to rotate about the output axis is further included, 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 radially distanced from the first central axis by a distance of D1, and a second position where the output axis is radially distanced from the first central axis by a distance of D2.

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

[0064] In some embodiments, the system further includes an output drive assembly disposed between the drive shaft and the output shaft.

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

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

[0067] In some embodiments, the radial distance between the first central axis and the outer edge of the output housing is R; wherein, 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.

[0068] One embodiment of this application provides a handheld power tool, including: a motor, including a drive shaft that rotates about a first axis; a drive housing that at least houses the motor; an output shaft, including a self-defined output axis, the output shaft rotating about the output axis to output power; and a transmission mechanism for connecting the drive shaft, the transmission mechanism being configured with the drive 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 and 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, and 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 that at least partially houses a first intermediate gear, and rotating the transmission housing drives the first intermediate gear to rotate about a third axis.

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

[0072] One embodiment of this application provides a handheld power tool, comprising: a motor including a drive shaft that rotates about a first axis; a drive housing that at least houses the motor; an output shaft including a self-defined output axis that rotates about 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; the output axis being offset from the first central axis, and the output housing rotating about the first central axis relative to the drive housing such that the output shaft rotates about the first central axis relative to the drive housing.

[0073] 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 section for inputting power and an output section connected to the output shaft, wherein the output section is offset from the input section when the output shaft is in a second position.

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

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

[0076] In some embodiments, when the output shaft switches between a first position and a second position, the driven wheel rotates about a first central axis along the internal teeth of the first internal gear ring. Attached Figure Description

[0077] Figure 1 This is a structural diagram of a handheld power tool according to an embodiment of this application, wherein the handheld power tool is in a first state;

[0078] Figure 2 This is a structural diagram of a handheld power tool according to an embodiment of this application, wherein the output shaft is in a first position;

[0079] Figure 3 This is a structural diagram of a handheld power tool according to an embodiment of this application, wherein the output shaft is in a second position;

[0080] Figure 4 This is a structural diagram of a handheld power tool according to an embodiment of this application from another perspective, wherein the handheld power tool is in a second state;

[0081] Figures 5A-5C This is a schematic diagram of the structure of a handheld power tool in the second position according to one embodiment of this application;

[0082] Figure 6 yes Figure 4 Another structural view of a handheld power tool;

[0083] Figure 7 yes Figure 2 A cross-sectional view of AA, showing another perspective of the structure of a handheld power tool;

[0084] Figure 8 This is a partial structural diagram of the internal structure of a handheld power tool according to an embodiment of this application;

[0085] Figure 9 yes Figure 8 A schematic diagram of a partial sectional view of the internal structure of a handheld power tool;

[0086] Figure 10 This is an exploded view of a partial structure of a handheld power tool according to an embodiment of this application, wherein the output shaft is in a first position;

[0087] Figure 11 This is an exploded view of a partial structure of a handheld power tool according to an embodiment of this application, wherein the output shaft is in a second position;

[0088] Figure 12 This is a cross-sectional view of the clamping part of a handheld power tool according to an embodiment of this application;

[0089] Figure 13A This is a structural diagram of a handheld power tool according to an embodiment of this application, wherein the output shaft is in a first position;

[0090] Figure 13B This is a structural diagram of a handheld power tool according to an embodiment of this application, wherein the output shaft is in a first position;

[0091] Figure 14 This is a structural diagram of a handheld power tool according to an embodiment of this application, wherein the output shaft is in a second position;

[0092] Figure 15 This is an internal structural diagram of the output transmission assembly of a handheld power tool according to an embodiment of this application;

[0093] Figure 16 This is an exploded view of a portion of the structure of a handheld power tool according to an embodiment of this application;

[0094] Figure 17 This is a structural diagram of a handheld power tool according to an embodiment of this application, wherein the output shaft is in a first position;

[0095] Figure 18 This is a structural diagram of a handheld power tool according to an embodiment of this application, wherein the output shaft is in a second position;

[0096] Figure 19 This is a half-sectional view of a portion of the structure of a handheld power tool according to an embodiment of this application;

[0097] Figure 20 This is an exploded view of a portion of the structure of a handheld power tool according to an embodiment of this application. Detailed Implementation

[0098] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0099] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

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

[0101] In this application, the terms "connection," "combination," "coupling," and "installation" can 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 the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0102] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to 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. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 1 degree, 1 degree or more) added to or subtracted from the indicated angle.

[0103] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0104] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0105] To clearly illustrate the technical solution of this application, the terms "upper side", "lower side", "left side", "right side", "front side" and "rear side" are defined in the accompanying drawings.

[0106] like Figure 1 As shown, a handheld power tool is described. In this embodiment, the handheld power tool is an electric drill 100. In some embodiments, it can also be other handheld tools, such as impact wrenches, impact screwdrivers, screwdrivers, impact drills, electric hammers, angle grinders, or angle tools. In some embodiments, the handheld power tool is a tool that achieves power output through rotation. In some embodiments, the handheld power tool is a tool that achieves tightening or loosening of fasteners through rotation output.

[0107] like Figure 1 As shown, taking an electric drill 100 as an example, the electric drill 100 includes a power supply 30. In this embodiment, the power supply 30 is a DC power supply. The DC power supply provides electrical energy to the electric drill 100. The DC power supply is a battery pack, which, in conjunction with a corresponding power circuit, supplies power to the electric drill 100. Those skilled in the art should understand that the power supply is not limited to scenarios using DC power; it can also be powered by mains power or AC power, in conjunction with corresponding rectification, filtering, and voltage regulation circuits, to power corresponding components within the machine. In the following description, the battery pack 30 will be used instead of the power supply, but this should not be construed as a limitation of this application.

[0108] like Figures 1 to 9As shown, 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, and will be referred to as such hereinafter, but this should not be construed as a limitation of this 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 an inner rotor motor, the stator assembly 122 is sleeved outside the rotor assembly 123. For an outer rotor motor, the rotor assembly 123 is sleeved outside the stator assembly 122. In this embodiment, the brushless motor is configured as a three-phase brushless motor. It is understood that the motor is not limited to a three-phase brushless motor and can also be other types of DC motors; this does not affect the substantive content of this application.

[0109] like Figure 1 As shown, 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 user gripping and operation. One end of the grip portion 114 is connected to a battery pack 30.

[0110] Output component 13 is configured to drive working attachments to realize the function of a handheld power tool. In this embodiment, output component 13 includes an output shaft 131. The output shaft 131 is configured to output power and rotates about an output axis 104. A clamping part 132 is provided at the front end of the output shaft 131, which can clamp corresponding working attachments, such as drill bits, screwdrivers, and sockets, when performing different functions. Optionally, the clamping part 132 is a quick-release clamping component. Figure 12 As shown, in some embodiments, when the handheld power tool is another type of drill, the clamping part 132' at the front end of the output shaft 131 is a multi-jaw clamping chuck structure. For those skilled in the art, both the clamping part 132 and the clamping part 132' are conventional related structures in nature. Therefore, for the purpose of brevity, detailed descriptions are omitted in this application, and no specific limitations are made.

[0111] like Figures 7-9As shown, a transmission mechanism 14 is connected between the output component 13 and the motor 12, such as a high-speed, high-torque output tool like 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 drive shaft 141 that defines a second axis 102, and the drive 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 speed reduction, and the number of planetary gear sets 142 can be single or multiple. 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 or connected to the drive shaft 121, and the planetary gears mesh with the sun gear. The drive shaft 141 is configured on the planetary carrier closest to the output shaft 131. It can be understood that the drive shaft 141 is the torque output end of the transmission mechanism 14, and the torque or speed on the drive 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 that applies an impact force to the output shaft 131, such as an impact wrench, impact drill, or electric hammer. Optionally, the transmission shaft 141 is then 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 set at a certain angle to the first axis 101. In other alternative embodiments, the second axis 102 and the output axis 104 are parallel to each other but do not coincide.

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

[0115] The shift assembly 143 includes a speed control knob 1431, which is disposed on the drive housing 111 or the second housing 112. By shifting the speed control knob 1431, multiple gear outputs can be achieved through multiple sets of gears with different transmission ratios.

[0116] like Figures 1 to 7As shown, 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 mounted on the grip unit 114 for user operation. The rotational speed of the motor 12 is adjusted according to the trigger switch's travel. In this embodiment, the trigger switch is coupled to a sliding rheostat 162; different trigger travels result in different analog signals output by the sliding rheostat 162. The trigger travel 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 travel of the trigger switch is small, the duty cycle of the PWM signal is also small, and the rotational speed of the motor 12 is also small. In some embodiments, the impact wrench stores a mapping relationship between the trigger travel of the trigger switch and the PWM signal. This mapping relationship can be linear or non-linear; this embodiment does not limit this.

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

[0118] In this embodiment, the second housing 112 includes an output housing 113 configured to support the rotation of the output shaft 131. Figures 7 to 9 As shown, the output housing 113 is provided with a receiving portion 1131. A first bearing 115, supporting the output shaft 131's rotation about an output axis 104, is fitted over the output shaft 131. The receiving portion 1131 is configured to mount the first bearing 115. Optionally, the first bearing 115 is a ball bearing, with its inner ring connected to the output shaft 131. It is understood that when the motor 12 begins to output power via the drive shaft 121, the output shaft 131 rotates relative to the output housing 113 about the output axis 104 to operate the fasteners. Optionally, the first bearing 115 also includes a sliding bearing, such as an oil-impregnated bearing. In some embodiments, such as... Figure 12 As shown, for example, in a drill, the clamping part 132' is also provided with a clamping part housing 1321'. In this embodiment, the housing of the clamping part 132' is not part of the output housing 113.

[0119] like Figures 1 to 2 As shown, the electric drill 100 includes: a first state in which the output axis 104 is substantially coaxial with the second axis 102, and, as... Figure 3 As shown in Figure 5, this represents the second state where the output axis 104 is radially offset from the second axis 102. Wherein, as... Figures 1 to 2 As shown, the first state can be understood as the "center" state of the output shaft 131, the operating condition of a typical fastening handheld power tool. Figure 3As shown in Figure 5, the second state can be understood as a "side-to-edge" state with the output shaft 131 offset.

[0120] like Figures 1 to 4 As shown, 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. This can be understood as follows: 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 relative to another stop point along the first central axis 105. Through the relative movement of the output shaft 131 relative to the output housing 113, the electric drill 100 achieves a first state and a second state. In related technologies, handheld fastening tools capable of offsetting the output shaft 131 for edge-fitting generally have an attachment mounted on the output shaft 131. The attachment's output shaft is eccentrically set to the machine's output shaft 131, meaning the attachment's output axis is radially offset from the machine's output axis 104. When edge-fitting with the output shaft 131 offset is required, the attachment is mounted on the machine. This structure requires users to carry additional accessories while working, and they also need to repeatedly detach and reattach the accessories (such as bits) to the machine body to adapt to edge-fitting and non-edge-fitting working conditions, which is detrimental 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, that is, the output shaft 131 includes: Figure 2 The first position shown and as Figure 4 The second position is shown. In the first position, the radial distance between the output shaft 104 and the first central shaft 105 is D1. In the second position, the radial distance between the output shaft 104 and the first central shaft 105 is D2. Where D1 is less than D2, and when the radial distance between the first central shaft 105 and the outer edge of the output housing 113 is defined as R, 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. Therefore, when the output shaft 131 is in the first position, the drill 100 is in the first state or one of the first states. When the output shaft 131 is in the second position, the drill 100 is in the second state or one of the second states.

[0122] Based on 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 nearly circular in projection along the front-rear direction, and the output housing 113 is provided 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. Figure 2 , Figure 4 and Figure 6As shown, 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 surface of the output housing 113 along the front-rear 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-rear direction after passing 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 does not affect the substantive content of this application.

[0123] By configuring an output shaft 131 that can move radially relative to the output housing 113, both a conventional center-mounted configuration and an offset configuration with the output shaft 131 offset relative to the center can be achieved without the use of accessories. Users can switch between and use these two states simply by adjusting the position of the output shaft 131, making switching convenient and improving work efficiency. No additional accessories are required, enhancing the user experience.

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

[0125] In some alternative embodiments, the first and second positions of the output shaft 131 correspond to two different edge-fitting states of the output shaft 131. In this case, it can be understood that when the output shaft 131 is in the first and second positions, the drill 100 is in the second state. For such embodiments, the output shaft 131 can be an accessory output shaft for an accessory product, and the output housing 113 can be the housing of the accessory product, enabling multiple edge-fitting dimensions to be achieved using a single accessory product, applicable to various edge-fitting conditions. The output shaft can be adjusted more flexibly relative to the first central axis 105 within the range of 0 to R. Therefore, when the first and second positions of the output shaft 131 correspond to two different edge-fitting states, it is also applicable to products with accessories, similarly improving 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 parallel to each other but not coincident. In other alternative embodiments, the first central axis 105 and the second axis 102 are set at a certain angle.

[0127] Optionally, the output shaft 131 rotates relative to the output housing 113 about the third axis 103. That is, the output shaft 131 achieves the first position (e.g., ...) by rotating about the third axis 103. Figure 1 ) and second position (such as Figure 3The switching between the first and second positions is achieved by means of a third axis 103 parallel to but offset from the first central axis 105. Optionally, the third axis 103 is positioned between a first position and a second position of the output shaft 131. Of course, in other alternative embodiments, the switching between the first and second positions can be achieved by radial translation or rotation relative to other reference axes.

[0128] like Figures 1 to 2 As shown, in the first state where the output axis 104 and the second axis 102 are substantially coaxial, the radial distances of the output axis 104 from the outer edges of both sides of the output housing 113 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. In some embodiments, the ratio of L1 / L2 is greater than or equal to 0.5 and less than or equal to 1. In some embodiments, the ratio of L1 / L2 is greater than or equal to 0.6 and less than or equal to 1. In some embodiments, the ratio of L1 / L2 is greater than or equal to 0.7 and less than or equal to 1. In some embodiments, the ratio of 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 embodiments of this 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 tool that rotates to output torque, 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., a drill 100 without an edge-adjusting function) is basically located at the center of the output housing 113, that is, when the output axis 104 is basically coaxial with the second axis 102 in the first state, the output axis 104 is basically coaxial with the first central axis 105. It is understandable that when the output shaft 131 is in the first position, D1 is basically 0. It is also understandable that for some conventional electric drills, the ratio of the radial distances from the output axis to the outer edges of both sides of the output housing in the same radial direction, i.e., L1 / L2, is not equal to 1 or is not basically coaxial. For such electric drill products, products with an output shaft offset function will have L1 / L2 not equal to 1 when the output shaft is in the first position; for example, the ratio of L1 / L2 is greater than or equal to 0.4 and less than 1.

[0129] In this embodiment, an output shaft 131 that can move relative to the output housing 113 is used so that the output shaft 131 can be offset relative to the first central axis 105 of the output housing 113, or it can return to the center of the output housing 113 or a position relatively close to the center. On the one hand, this maintains the shape and usage habits of conventional screwdrivers in related technologies. On the other hand, 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 from the above, the output shaft 131 is radially displaced relative to the output housing 113 around the third axis 103 to the second position.

[0131] like Figures 4 to 5A As shown in Figure -5C, to achieve multi-directional biasing of the 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 biasing in multiple directions. 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 about the first central axis 105 relative to the drive housing 111, and the output shaft 131 rotates synchronously with the second housing 112. Optionally, the second housing 112 may partially rotate about 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 their geometric centers may be the same. In some embodiments, the handheld power tool may also include a structure for adjusting torque or output speed by rotation, but since the rotation of such a component does not change the relative position of the output axis with respect to the second axis, such a rotating component is not part of the second housing.

[0132] Since the output shaft 131 requires stable connection and drive during operation, i.e., when outputting power, the drill 100 also includes a first locking part 151 configured to hold the output shaft 131 in a first position or a second position, and a second locking assembly 19 configured to selectively lock the rotation of the output housing 113 relative to the drive housing 111. The specific structure of the first locking part 151 and the second locking assembly 19 will be described in detail below.

[0133] like Figures 7 to 11As shown, the electric drill 100 also includes a clutch assembly 15, disposed between the drive shaft 141 and the output shaft 131. The clutch assembly 15 includes: a connected state for torque transmission between the drive shaft 141 and the output shaft 131, and a disengaged state for disengagement of transmission between the drive shaft 141 and the output shaft 131. When the clutch assembly 15 is in the disengaged 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 disengaged state, the output shaft 131 is allowed to move radially relative to the output housing 113. The clutch assembly 15 enables 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 both the first and second positions. Wherein, as... Figure 9 and Figure 11 As shown, the output shaft is in the second position, as... Figure 10 As shown, 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 achieve the offset function. By setting the connected state, the power transmission path can be guaranteed after the output shaft 131 undergoes radial displacement, thus ensuring the functionality of the electric drill 100.

[0135] The electric drill 100 also includes an output drive assembly 18, disposed between the drive shaft 141 and the output shaft 131. For example... Figure 10 As shown, the output transmission assembly 18 includes an input section 18a connected to the transmission shaft 141 and an output section 18b connected to the output shaft 131. Figure 10 and Figure 11 As shown, the output section 18b includes a first transmission wheel 181 and a second transmission wheel 182. The output shaft 131 can be selectively coupled to either the first transmission wheel 181 or the second transmission wheel 182 to transmit power from the transmission shaft 141 to the output shaft 131. By selectively coupling the output shaft 131 to 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, this radial displacement of the output shaft 131 ensures the power transmission path and guarantees the functionality 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 drive shaft 141, output transmission assembly 18, clutch assembly 15, and output shaft 131 may share some structural components. Furthermore, the output transmission assembly 18 and clutch assembly 15 can be selectively configured according to different product requirements.

[0137] like Figures 9 to 10As shown, the clutch assembly 15 includes a first locking part 151 and a reset part 152. The first locking part 151 is configured to hold the output shaft 131 in a first position or a second position. The first locking part 151 includes a first limiting part 1511 corresponding to the first position and a second limiting part 1512 corresponding to the second position. The output shaft 131 can be selectively connected to the first limiting part 1511 or the second limiting part 1512 at the corresponding position. Optionally, the first limiting part 1511 corresponds to the output shaft 131 being in the first position, and the second limiting part 1512 corresponds to the output shaft 131 being in the second position. The first limiting part 1511 and the second limiting part 1512 are formed on or connected to the first mounting bracket 153. Optionally, the first limiting part 1511 includes a limiting tooth 154, and the second limiting part 1512 includes the same limiting tooth 154 as the first limiting part 1511. The rear end of the output shaft 131 is formed or connected to a limiting tooth groove 1311 that mates with the limiting tooth 154. When the output shaft 131 is connected to the first limiting part 1511 or the second limiting part 1512, the limiting tooth groove 1311 connects with the limiting tooth 154, thereby restricting the rotational movement of the output shaft 131 relative to the first limiting part 1511 or the second limiting part 1512. It is understood that the positions of the limiting tooth and the limiting tooth groove can be interchanged, which does not affect the substantive content of this application. In some embodiments, the engagement between the output shaft and the limiting part can also be achieved through other mechanical engagement structures to realize the circumferential limiting of the output shaft by the limiting part. In some embodiments, the engagement between the output shaft and the limiting part can also be achieved through electromagnetic means to realize the circumferential limiting of the output shaft by the limiting part.

[0138] To enable position switching of the output shaft 131 relative to the output housing 113, a first mounting portion 134 is formed 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 allow the output shaft 131 to switch between a first position and a second position by rotating around the third axis 103, the first connecting portion 155 and the first mounting bracket 153 are connected 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 rotatably connects the first mounting portion 134 to the first mounting bracket 153, i.e., rotatably connects the output shaft 131 to the first mounting bracket 153. This allows the output shaft 131 to be connected to either the first limiting portion 1511 or the second limiting portion 1512. Optionally, the first shaft 1552 connects between the first limiting portion 1511 and the second limiting portion 1512.

[0139] The reset part 152 is configured to drive the clutch assembly 15 from a disengaged state to a engaged state. Optionally, when the output shaft 131 is separated from the first limiting part 1511 or the second limiting part 1512, the reset part 152 applies a force to bring the output shaft 131 closer to the first limiting part 1511 or the second limiting part 1512. In this embodiment, the reset part 152 includes a helical spring; optionally, the reset part 152 is a compression spring. Optionally, to stably fix the reset part 152, one end of the reset part 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 part 152 is connected to the first mounting part 134, and the other end is connected to the first mounting bracket 153. Meanwhile, to prevent the reset part 152 from twisting, the reset part 152 is sleeved on the first shaft 1552.

[0140] The output shaft 131 is in the first position (e.g.) Figure 10 Switch to the second position (e.g.) Figure 9 and Figure 11 For example, when the output shaft 131 is in the first position, the limiting groove 1311 on the output shaft 131 engages with the limiting tooth 154 of the first limiting part 1511, that is, the output shaft 131 is held within the first limiting part 1511. At this time, the reset part 152 is in a state of no force, or a force is applied to the output shaft 131 towards the first limiting part 1511 to make the axial engagement between the output shaft 131 and the first limiting part 1511 more stable. By applying an external force to the output shaft 131 away from the first limiting part 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 part 1511. In this embodiment, for example, the user pulls the output shaft forward, at which time the reset part 152 is compressed and stores energy. By applying an external force to rotate the output shaft 131 around the third axis 103, it moves from the first position to the second position, and the output shaft 131 moves to a position that is substantially aligned with the second limiting part 1512. After the external force is removed, the reset part 152 releases energy to drive the output shaft 131 toward the second limiting part 1512, so that the output shaft 131 enters the second limiting part 1512, and the limiting tooth groove 1311 engages with the limiting tooth 154 of the second limiting part 1512. The position switching of the output shaft 131 is completed.

[0141] In this embodiment, as Figure 10 As shown, a displacement limiting groove 1132 is provided on the output housing 113. The limiting groove 1132 is configured to indicate the first position and the second position of the output shaft 131, so that the output shaft 131 can be aligned more accurately with the first limiting part 1511 or the second limiting part 1512.

[0142] like Figure 9 As shown, the first mounting part 134 includes a bearing housing 1341 that accommodates the first bearing 115, and the first mounting part 134 is received into the housing part 1131 by the output housing 113.

[0143] The first drive wheel 181 of the output transmission assembly 18 is driveably connected to the first limiting part 1511, and the second drive wheel 182 is driveably connected to the second limiting part 1512. Optionally, the axle of the first drive wheel 181 drives the first limiting part 1511, and the axle of the second drive wheel 182 drives the second limiting part 1512. Optionally, when the output shaft 131 is in the first position, the output shaft 131 is coupled to the first drive wheel 181. Optionally, when the output shaft 131 is in the second position, the output shaft 131 is coupled to the second drive wheel 182.

[0144] In this embodiment, since the output axis 104 and the second axis 102 are substantially coaxial when the output shaft 131 is in the first position, the first transmission wheel 181 is coaxially coupled to the transmission shaft 141. Optionally, the transmission shaft 141 directly drives the first transmission wheel 181, that is, the transmission shaft 141 acts as the axle of the first transmission wheel 181. The axis 181a of the first transmission wheel 181 is the second axis 102. Optionally, the output transmission assembly 18 includes a wheel frame 184, which is configured to support the transmission wheel. In this embodiment, the wheel frame 184 is provided with an axle in the form of a cantilever beam, wherein the first transmission wheel 181 is provided with a shaft hole 1841 at a corresponding position so that the transmission shaft 141 passes through the wheel frame 184 and is connected to the first transmission wheel 181. In other alternative embodiments, the first transmission wheel 181 is connected to the wheel frame 184 via an axle and 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 the 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 substantially parallel, and the first transmission wheel 181 and the second transmission wheel 182 rotate in the same direction. This ensures that the output shaft 131 rotates in the same direction in both the first and second positions. Therefore, the output section 18b also includes a third transmission wheel 183, which is connected to both the first transmission wheel 181 and the second transmission wheel 182.

[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 through 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 all cylindrical gears and are externally meshed. Optionally, the first transmission wheel 181, the third transmission wheel 183, and the second transmission wheel 182 are connected by transmission with a 1:1 transmission ratio. Optionally, the transmission ratio between the first transmission wheel 181 and the third transmission wheel 183 is less than 1, and the transmission ratio between the third transmission wheel and 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 basically the same. That is, the first transmission wheel 181 to the second transmission wheel 182 are connected by transmission with a 1:1 transmission ratio.

[0146] In this embodiment, the axle 1843 of the third transmission wheel 183 is parallel to but does not coincide 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] like Figures 7 to 9As shown, 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, adjusting the relative position of the output shaft 104 with respect to the second axis 102. In this embodiment, the axial length L from the rear end of the second housing 112 to the end face of the output shaft 131 protrusion is less than or equal to 56 mm. Because this embodiment uses the clutch assembly 15 and a single-layer gear assembly to achieve the position switching of the output shaft 131 and ensure the transmission path, the structure of the output shaft 131 biasing function portion is compact. Compared to structures using two or more stages of bias gear transmission in related technologies, the axial dimension is smaller, resulting in a more compact product structure. In some embodiments, the axial length L from the rear end of the second housing 112 to the end face of the output shaft 131 protrusion 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 face of the output shaft 131 protrusion 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 end face from the rear end of the second housing 112 to the protrusion of the output shaft 131 is less than or equal to 50 mm. In some embodiments, the axial length L of the end face from the rear end of the second housing 112 to the protrusion of the output shaft 131 is less than or equal to 45 mm. In some embodiments, the axial length L of the end face from the rear end of the second housing 112 to the protrusion of the output shaft 131 is less than or equal to 40 mm. In some embodiments, the axial length L of the end face from the rear end of the second housing 112 to the protrusion of the output shaft 131 is less than or equal to 35 mm. In some embodiments, the axial length L of the end face from the rear end of the second housing 112 to the protrusion of the output shaft 131 is less than or equal to 30 mm. In some embodiments, the axial length L of the end face from the rear end of the second housing 112 to the protrusion of the output shaft 131 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 drive wheel 181 is coaxially connected to the drive 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, and the second drive wheel 182 and the third drive wheel 183 rotate about the first central axis 105 relative to the drive housing 111. In some embodiments, due to design or other requirements, the output housing is part of the second housing. In some embodiments, when the second housing is an integral unit 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 a portion thereof, are configured as removable accessory portions to achieve multiple offset dimensions with one accessory, where the second housing, the output housing, or both the second housing and the output housing form the outer shell of the accessory, or the second housing, the output housing, or both the second housing and the output housing form the outer shell of a portion of the accessory. In such embodiments, the axial length L from the rear end of the second housing to the end face at the output shaft extension 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 face at the output shaft extension 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 face at the output shaft extension 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 face at the output shaft extension 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 face at the output shaft extension 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 face at the output shaft extension 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 face 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 face 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 face where the output shaft extends is less than or equal to 25 mm.

[0150] like Figure 11As shown, the second locking assembly 19 includes a locking toothed ring 191 and a sliding portion 192. One end of the sliding portion 192 is formed with or connected to an operating member 193, which is at least partially located on the visible surface and 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 engages with the teeth on the locking toothed ring 191 to restrict the rotation of the second housing 112. Optionally, the sliding portion 192 is connected to the drive housing 111, and the locking toothed ring 191 is disposed on the output housing 113, rotating with the output housing 113. Optionally, the locking toothed ring 191 includes a plurality of teeth 1911, so that the output housing 113 includes a plurality of locking positions, allowing the drill 100 to be biased in multiple directions. This makes the applicable working conditions more diverse. An external force drives the sliding part 192 to separate it from the teeth 1911 of the locking gear ring 191, allowing the user to rotate the output housing 113. After the external force is removed, the sliding part 192 slides under the driving force of the drive part 194 until it engages with the teeth 1911, or the locking gear ring 191 is rotated until the teeth 1911 closest to the sliding part 192 engage with it. When the drive part 194 applies a driving force, the engagement between the sliding part 192 and the teeth 1911 is more stable, providing sufficient locking force. Optionally, the drive part 194 is a spring.

[0151] In some alternative embodiments, the operating member 193 may be omitted, and the output housing 113 may be rotated to drive the sliding part 192 to generate displacement so that the sliding part 192 disengages from the locking gear ring 191, thereby completing the rotational movement of the output housing 113.

[0152] like Figures 13A to 16 As shown, another embodiment of the electric drill of this application is described, wherein the features and elements corresponding to the features and elements of the electric drill 100 are given similar reference numerals followed by the letter "B", and the reference numerals for the same features are consistent. The following description mainly focuses on the differences between the embodiments.

[0153] Handheld power tools, reference Figure 7 It includes: a motor 12, including a drive shaft 121 that rotates about a first axis 101, a drive housing 111 that at least houses the motor 12; and an output shaft 131, including a self-defined output axis 104, the output shaft 131 rotating about the output axis 104 to output power.

[0154] like Figures 13A to 14The handheld power tool further includes an output housing 113B for supporting the rotation of the 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 radial distance between the output axis 104 and the first central axis 105B is D1, and a second position where the radial distance between the output axis 104 and the first central axis 105B is D2. 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. This can be understood as each movement of the output shaft 131 relative to the output housing 113B configuring a stop point, each stop point being offset radially along the first central axis 105B relative to the other stop point. Through the relative movement of the output shaft 131 relative to the output housing 113B, the drill 100 achieves a first state (the "center" state of the output shaft 131) and a second state (the "edge" state of the output shaft 131 being offset). The output shaft 131 moves radially relative to the output housing 113B along the first central axis 105B, that is, the output shaft 131 includes: Figure 13A And as shown in 13B, the first position and as shown in Figure 14 The second position is shown. In the first position, the radial distance between the output axis 104 and the first central axis 105B is D1. In the second position, the radial distance between the output axis 104 and the first central axis 105B is D2. Wherein, D1 is less than D2.

[0155] In this embodiment, when the output shaft 131 is in the first position, the output axis 104 and the second axis 102 are basically coaxial; when the output shaft 131 is in the second position, the output axis 104 and the second axis 102 are radially offset.

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

[0157] like Figures 15 to 16 As shown, it also includes an output transmission assembly 18B, disposed between the drive shaft and the output shaft 131. In this embodiment, a transmission mechanism 14 is provided 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 other alternative embodiments, the drive shaft directly drives the output shaft, and the output transmission assembly 18B may also be disposed between the drive shaft and the output shaft.

[0158] In this embodiment, the output transmission assembly 18B includes an input section 181B for power input, which, exemplarily, is connected to a drive shaft 141. The output transmission assembly 18B also includes an output section 182B connected to an 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 an output axis 104. The first intermediate gear 185B is driven to rotate about a third axis 103, thereby causing the output shaft 131 to rotate about the third axis 103. In this embodiment, the output axis 104 and the third axis 103 are offset.

[0159] The output shaft 131 switches between a first position and a second position by rotating about a 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 and second states, and the output shaft 131 rotates about the output axis 104 relative to the output housing 113B to output power.

[0160] The output transmission assembly 18B includes a transmission housing 186B, which at least partially houses a first intermediate gear 185B. Rotating the transmission housing 186B drives the first intermediate gear 185B to rotate about a 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 consistency and compactness of appearance, the transmission housing 186B and the output housing 113B are coaxial. In some embodiments, the rotation axis of the transmission housing 186B is parallel to but does not coincide with the output axis 104. In some embodiments, the rotation axis of the transmission housing 186B intersects the output axis 104.

[0161] For example, the first intermediate gear 185B includes a sector gear, driven to reciprocate around the third axis 103, thereby driving the output shaft 131 to switch between a first position and a second position. Optionally, the sector gear is an external gear. The transmission housing 186B is provided with a first internal tooth 1861B circumferentially. In this embodiment, the first internal tooth 1861B and the external tooth of the first intermediate gear 185B are connected by an idler gear 187B. The idler gear 187B is disposed between the first internal tooth 1861B and the first intermediate gear 185B, and the idler gear 187B rotates around its axis. Optionally, the transmission housing 186B rotates in a first direction, the first internal tooth 1861B drives the idler gear 187B to rotate in the first direction, and the idler gear 187B meshes with the external tooth of the first intermediate gear 185B, driving the first intermediate gear 185B to rotate in a 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 drive shaft 141 to output shaft 131: Input section 181B includes a driving gear 1811B, which is an external gear. Output section 182B includes a driven gear 1821B, which is also an external gear. Output section 182B is coaxially arranged with output shaft 131, meaning it rotates around output axis 104. A second intermediate gear 188B is provided between input section 181B and output section 182B to enable output section 182B to rotate in the same direction as drive shaft 141. In this embodiment, the second intermediate gear 188B rotates around third axis 103. That is, the first intermediate gear 185B and the second intermediate gear 188B are coaxially arranged to ensure product compactness. The second intermediate gear 188B is an external gear; input section 181B meshes with the second intermediate gear 188B, and the second intermediate gear 188B meshes with the output section 182B. The output section 182B is driven by the first intermediate gear 185B to rotate around the third axis 103 along the outer periphery of the second intermediate gear 188B. That is, when the output shaft 131 switches between the first position and the second position, the output section 182B and the second intermediate gear 188B remain engaged.

[0163] A displacement limiting groove 1132B is provided on the output housing 113B. The limiting groove is used to indicate the first position and the second position of the output shaft 131. Exemplarily, the displacement limiting groove 1132B limits the displacement endpoint of the output shaft 131. Exemplarily, the displacement limiting groove 1132B limits the relative displacement between the transmission housing 186B and the first intermediate gear 185B, preventing the meshing state of the transmission housing 186B and the rack of the first intermediate gear 185B from disengaging.

[0164] like Figures 17 to 20 As shown, the electric drill of the third embodiment of this application, wherein features and elements corresponding to the features and elements of the electric drill 100 are given similar reference numerals followed by the letter "C", and the same features are referred to by the reference numerals in the first embodiment. The following description mainly focuses on the differences between the third embodiment and the first embodiment.

[0165] Handheld power tools, reference Figure 7 It includes: a motor 12, including a drive shaft 121 that rotates about a first axis 101; and a drive housing 111 that at least houses the motor 12.

[0166] like Figure 17As shown, it also includes an output shaft 131C, including a self-defined output axis 104C, about which the output shaft 131C rotates to output power; and an output housing 113C, configured to support the rotation of the output shaft 131C, the output housing 113C defining a first central axis 105C passing through its geometric center. The output axis 104C is offset from the first central axis 105C, and the output housing 113C rotates relative to the drive housing 111 about the first central axis 105C, so that the output shaft 131C rotates relative to the drive housing 111 about the first central axis 105C.

[0167] The output shaft 131C rotates around the first central axis 105C to switch between the first position and the second position. When the output shaft 131C is in the first position, the radial distance between the output axis 104C and the first axis 101 is D1. When the output shaft 131C is in the second position, the radial distance between the output axis 104C and the first axis 101 is D1, where D1 is less than D2. In this embodiment, when the output shaft 131C is in the first position, the output axis 104C is substantially 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. By offsetting the output axis 104C to the first center axis 105C of the rotation center axis, the output shaft 131C can switch between the first state (the "center" state of the output shaft 131C) where the output axis 104C is substantially coaxial with the first axis 101 and the second state (the "edge" state of the output shaft 131C) where the output axis 104C is offset from the first axis 101, thereby achieving edge-fitting operation.

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

[0169] In some embodiments, reference Figure 7 The handheld power tool also includes: a transmission mechanism 14 for connecting a drive shaft 121, the transmission mechanism 14 being configured to define a drive shaft 141 having a second axis 102.

[0170] The output shaft 131C rotates around the first central axis 105C to switch between a first position and a second position. When the output shaft 131C is in the first position, the radial distance between the output axis 104C and the second axis 102 is D1; ​​when the output shaft 131C is in the second position, the radial distance between the output axis 104C and the second axis 102 is D1, where D1 is less than D2. In this embodiment, when the output shaft 131C is in the first position, the output axis 104C and the second axis 102 are substantially coaxial; when the output shaft 131C is in the second position, the output axis 104C and the second axis 102 are radially offset. By offsetting the output axis 104C with the first central axis 105C of the rotation center axis, the output shaft 131C can switch between a first state (the "center" state) where the output axis 104C and the second axis 102 are substantially coaxial, and a second state (the "edge-biased" state) where the output axis 104C is offset from the first axis 101, thus achieving edge-biasing operation. In this embodiment, the first central axis 105C is offset from the second axis 102.

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

[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 does not coincide with the first axis 101; in some embodiments, the second axis 102 intersects the first axis 101. In some embodiments, if the drive shaft 121 directly drives the output shaft 131C, the "center" state 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. That is, the power output end of the output shaft 131C is the transmission shaft 141, and thus the "center" state and the offset "edge" state of the output shaft 131C are respectively relative to the transmission shaft 141.

[0173] In this embodiment, as Figures 19 to 20As shown, it also includes an output transmission assembly 18C, disposed between the drive shaft 141 and the output shaft 131C. The output transmission assembly 18C includes an input portion 181C for power input and an output portion 182C connected to the output shaft 131C. Exemplarily, the input portion 181C is connected to the drive shaft 141. When the output shaft 131C is in a second position, the output portion 182C is offset from the input portion 181C. In this embodiment, when the output shaft 131C is in a first position, the output axis 104C and the second axis 102 are substantially coaxial, therefore the output portion 182C and the input portion 181C are substantially coaxial.

[0174] In this embodiment, the output transmission assembly 18C further includes a first internal gear ring 185C, with the input portion 181C and the output portion 182C respectively meshing with the first internal gear ring 185C. The output transmission assembly 18C includes a transmission housing 186C, which is rotatably connected to the output housing 113C. The first internal gear ring 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 gear 1811C, which is an external gear. The output portion 182C includes a driven gear, which is also an external gear. The output portion 182C is coaxially arranged with the output shaft 131C, meaning that the output portion 182C rotates around the output axis 104C. The driving gear 1811C drives the first internal gear ring 185C to rotate, thereby causing the output portion 182C to rotate. For example, a bearing 188C is provided outside the internal gear ring, and the bearing 188C supports the rotation of the first internal gear ring 185C. Optionally, the bearing 188C is supported inside the transmission housing 186C. In this embodiment, the transmission shaft 141 drives the first internal gear ring 185C to rotate through the drive wheel 1811C. The output part 182C meshes with the first internal gear ring 185C, thereby driving the output part 182C to rotate. The output part 182C drives the output shaft 131C to rotate around the output axis 104C relative to the output housing 113C, thereby outputting torque.

[0175] In this embodiment, the central axis of the first internal gear ring 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 part 182C rotates around the first central axis 105C along the internal teeth of the first internal gear ring 185C. For example, when the output shaft 131C switches between the first position and the second position, the first internal gear ring 185C does not rotate, and the output part 182C remains engaged with the first internal gear ring 185C.

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

[0177] The foregoing has shown and described 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 way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this application.

Claims

1. A hand-held power tool, comprising: a motor including a drive shaft rotating about 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 about 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 thereof; the output axis being disposed offset from the first central axis, the output housing being rotatable about the first central axis relative to the drive housing to cause the output shaft to rotate about the first central axis; an output transmission assembly disposed between the drive shaft and the output shaft; the output transmission assembly including an input portion powered by the drive shaft and an output portion connected to the output shaft; and a first inner ring, the input portion and the output portion being respectively engaged with inner teeth of the first inner ring. The input portion includes a driving wheel formed on or connected to the drive shaft, and the output portion includes a driven wheel formed on or connected to the output shaft, the driving wheel driving the first inner ring to rotate and in turn driving the driven wheel to rotate.

2. The hand-held power tool of claim 1, characterized in that The central axis of the first inner ring is substantially coaxial with the first central axis.

3. The hand-held power tool of claim 1, wherein, The output shaft rotates about the first central axis to switch between a first position and a second position, the output axis being radially distanced from the first axis by a distance D1 when the output shaft is in the first position, and the output axis being radially distanced from the first axis by a distance D2 when the output shaft is in the second position, wherein D1 is less than D2.

4. The hand-held power tool of claim 2, wherein, The output portion is disposed offset from the input portion when the output shaft is in the second position.

5. A hand-held power tool according to claim 4, characterized in that The driven wheel rolls along the inner teeth of the first inner ring and rotates about the first central axis when the output shaft switches between the first position and the second position.

6. The hand-held power tool of claim 4, wherein, The first inner ring does not rotate when the output shaft switches between the first position and the second position, and the output portion remains engaged with the first inner ring.

7. A hand-held power tool according to claim 6, characterized in that Further comprising a transmission mechanism connected to the drive shaft, the transmission mechanism being provided with a transmission shaft having a second axis; the output shaft rotates about the first central axis to switch between a first position and a second position; the output axis is radially distanced from the second axis by a distance D1 when the output shaft is in the first position, and the output axis is radially distanced from the second axis by a distance D2 when the output shaft is in the second position, wherein D1 is less than D2.

8. The hand-held power tool of claim 1, wherein, The first central axis is disposed offset from the second axis.

9. A hand-held power tool according to claim 8, characterized in that The output housing is provided with an accommodating portion, and the output shaft is provided with a first bearing for supporting the output shaft to rotate about the output axis.

10. The hand-held power tool of claim 1, characterized by ​

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