Power tool

Abstract

The application discloses an electric tool, which comprises a motor, a driving shaft rotating around a first axis, an output shaft for connecting a working accessory, a shaft lock assembly comprising a first shaft lock member and a second shaft lock member moving relative to the first shaft lock member, wherein the second shaft lock member is engaged with the first shaft lock member when the second shaft lock member is in a first position, the second shaft lock member is disengaged from the first shaft lock member when the second shaft lock member is in a second position, the rotation of the output shaft is limited or released when the second shaft lock member is in the first position or the second position, and an operation assembly comprising at least a first fixed state and a second fixed state, which is configured to trigger the second shaft lock member to be in the first position and limit the movement of the second shaft lock member to the second position when in the first fixed state, and allow the second shaft lock member to be displaced from the first position to the second position when in the second fixed state. The application can effectively lock the output shaft, thereby facilitating the user to replace the working accessory.

Description

Technical Field

[0001] This application relates to a power tool, specifically an electric tool. Background Technology

[0002] Power tools play a vital role in daily production and life. Power tools include, but are not limited to, electric drills, impact drills, impact wrenches, impact screwdrivers, angle grinders, chainsaws, and circular saws. Electric drills and impact drills can be configured with drill bits of different diameters to drill holes in objects; impact wrenches are used to tighten bolts and nuts; impact screwdrivers are typically used to loosen or tighten the first screw; and angle grinders can be used for grinding and cutting objects. Using power tools can improve work efficiency and reduce labor intensity. Chainsaws and circular saws are used in woodworking.

[0003] When changing the saw blade on a handheld circular saw, the user needs to first use a shaft lock to lock the output shaft before the blade can be replaced. Currently, when changing the saw blade on a handheld circular saw, the user needs to continuously press and hold the shaft lock button. Once the button is released, the output shaft will rotate, making it impossible to change the saw blade, thus making the blade replacement difficult and inconvenient.

[0004] This section provides background information related to this application, which is not necessarily prior art. Utility Model Content

[0005] One objective of this application is to solve or at least alleviate some or all of the aforementioned problems by effectively locking the output shaft, thereby facilitating the user's replacement of working accessories.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An electric tool includes: a motor including a drive shaft that rotates about a first axis; an output shaft for connecting a working attachment; the output shaft being driven by the motor to rotate about a second axis; a shaft locking assembly for restricting rotation of the output shaft; the shaft locking assembly including a first shaft locking member and a second shaft locking member that moves relative to the first shaft locking member; wherein, when the second shaft locking member is in a first position, the second shaft locking member is engaged with the first shaft locking member; when the second shaft locking member is in a second position, the second shaft locking member is disengaged from the first shaft locking member; when the second shaft locking member is in the first position or the second position, the restriction on rotation of the output shaft is applied or released; an operating component including at least a first fixed state and a second fixed state, configured to trigger the second shaft locking member to the first position and restrict movement of the second shaft locking member to the second position when in the first fixed state, and to allow the second shaft locking member to displace from the first position to the second position when in the second fixed state.

[0008] In some embodiments, the second shaft locking member includes a shaft locking rod that engages or disengages from the first shaft locking member and a drive member coupled to an operating component; when the operating component switches between a first fixed state and a second fixed state, it triggers the drive member to move, thereby causing the shaft locking rod to move relative to the first shaft locking member in a direction perpendicular to the second axis.

[0009] In some embodiments, the drive member includes a drive base connected to the shaft locking rod and a first elastic member interacting with the drive base; in a first fixed state, the operating component drives the shaft locking rod to engage with the first shaft locking member through the drive base and compresses the first elastic member through the drive base; in a second fixed state, the first elastic member drives the shaft locking rod to disengage from the first shaft locking member through the drive base.

[0010] In some embodiments, the first shaft locking member is provided with a locking portion for selective engagement or disengagement of the second shaft locking member; the driving member further includes a second elastic member disposed in the driving base, the first end of the second elastic member being able to apply pressure along the third axis direction to the shaft locking rod, and the second end of the second elastic member being able to be subjected to pressure along the third axis direction applied by the operating component; during the process of the operating component switching to the first fixed state, if the shaft locking rod is not engaged with the locking portion, the second elastic member is compressed; when the shaft locking rod is able to engage with the locking portion, the second elastic member drives the shaft locking rod to engage with the locking portion.

[0011] In some embodiments, the second elastic member also provides a biasing force that moves the first shaft locking member toward the engaging locking portion.

[0012] In some embodiments, one end of the drive base is provided with a first connecting portion, and one end of the shaft locking rod is provided with a second connecting portion that cooperates with the first connecting portion.

[0013] In some embodiments, the first shaft locking member includes a shaft locking disc formed or connected on the output shaft, and a plurality of locking portions are discretely arranged along the outer periphery of the shaft locking disc.

[0014] In some embodiments, the operating component is a cam structure rotatable about a first axis, and the operating component is in continuous contact with the second shaft locking member; the cam structure includes at least one protrusion and a smooth portion opposite the protrusion; in a first fixed state, the protrusion of the operating component contacts the second shaft locking member to trigger the second shaft locking member to be in a first position; in a second fixed state, the smooth portion of the operating component contacts the second shaft locking member to trigger the second shaft locking member to be in a second position.

[0015] In some embodiments, the operating components further include a lever that can drive the cam structure to rotate about a first axis.

[0016] In some embodiments, the power tool includes a working head and a guard that partially surrounds the working head; a first spindle is disposed on the guard.

[0017] The advantages of this application are:

[0018] This application provides an electric tool in which a motor drives an output shaft to rotate, thereby driving a working attachment. A shaft locking assembly restricts the rotation of the output shaft. When the first shaft locking member is in a first position, a second shaft locking member engages with the first, thus restricting the output shaft and preventing rotation. When the second shaft locking member is in a second position, it disengages from the first, releasing the output shaft and allowing it to rotate normally. An operating component includes a first fixed platform and a second fixed state, which can switch between to adjust the position of the second shaft locking member, thus controlling whether the output shaft is locked. When changing the working attachment, the user adjusts the operating component to the first fixed state, engaging the second shaft locking member to lock the output shaft. After changing the working attachment, the user adjusts the operating component to the second fixed state, disengaging the second shaft locking member from the first, releasing the output shaft and allowing it to be driven by the motor. This method effectively locks the output shaft, facilitating attachment changes and simplifying operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of one embodiment of this application;

[0020] Figure 2 This is a schematic diagram from another perspective of one embodiment of this application;

[0021] Figure 3 This is a schematic diagram of a shaft lock assembly in one embodiment of this application;

[0022] Figure 4 This is a front view of one embodiment of this application;

[0023] Figure 5 This is a schematic diagram showing the removal of a portion of the shell in one embodiment of this application;

[0024] Figure 6 This is another schematic diagram showing the removal of a portion of the housing in one embodiment of this application;

[0025] Figure 7 This is a schematic diagram of the working head in one embodiment of this application;

[0026] Figure 8 This is a schematic diagram of an anti-locking component in one embodiment of this application.

[0027] In the picture:

[0028] 100. Power tool; 110. Housing; 120. Trigger; 130. PCB board; 140. Working attachment; 200. Battery pack; 210. Battery pack connector; 1. Motor; 11. Motor housing; 12. First shaft; 2. Output shaft; 21. Second shaft; 22. Bearing; 3. Shaft lock assembly; 31. First shaft lock element; 311. Shaft lock disc; 312. Locking part; 32. Second shaft lock element; 321. Shaft lock rod; 3211. Second connection 3212, Third axis; 322, Drive base; 3221, First connecting part; 323, First elastic element; 324, Second elastic element; 4, Operating component; 41, Cam structure; 411, Protrusion; 412, Smooth part; 42, Lever; 5, Anti-locking component; 51, Anti-locking switch; 511, Locking groove; 512, Unlocking groove; 52, Pressure plate; 521, Boss; 53, Compression spring; 6, Protective cover; 61, First rotating shaft; 7, Working head. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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%, 5%, 10% 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, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0034] 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.

[0035] 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.

[0036] Power tools play a vital role in daily production and life. Power tools include, but are not limited to, electric drills, impact drills, impact wrenches, impact screwdrivers, angle grinders, chainsaws, and circular saws. Electric drills and impact drills can be configured with drill bits of different diameters to drill holes in objects; impact wrenches are used to tighten bolts and nuts; impact screwdrivers are typically used to loosen or tighten screws; angle grinders can be used for grinding and cutting; and chainsaws and circular saws are used for woodworking. Using power tools can improve work efficiency and reduce labor intensity.

[0037] like Figure 1 and Figure 2As shown, the power tool 100 uses a rechargeable battery pack as its power source. In this embodiment, the battery pack is a battery stack 200, which, in conjunction with a corresponding power circuit, supplies power to the power tool 100. Those skilled in the art will understand that in other embodiments, the power tool 100 can also be powered by other power supply devices. For example, the power supply can be an AC power line connected to the mains, or it can be other connecting cables that can be connected to a power supply device. The mains power or other power supply device, in conjunction with corresponding rectification, filtering, and voltage regulation circuits, supplies power to the corresponding components of the power tool 100. The term "battery stack 200" will be used hereinafter to refer to the power source, but this should not be construed as a limitation of this application.

[0038] When a handheld circular saw is used as a power tool 100, the saw blade needs to be replaced after a certain period of operation. To facilitate the removal of the saw blade, a shaft lock is usually used to lock the output shaft 2 of the handheld circular saw. Currently, when changing the saw blade of a handheld circular saw, the user needs to continuously press and hold the shaft lock button to change the saw blade. Once the button is released, the output shaft 2 will rotate, making it impossible to change the saw blade, which makes the saw blade replacement difficult and inconvenient to operate.

[0039] To address the aforementioned issues and facilitate user replacement of the working accessory 140, thereby improving maintainability, such as... Figures 1-8 As shown, this application provides a power tool 100. The power tool 100 includes a motor 1, an output shaft 2, a shaft locking assembly 3, and an operating assembly 4. The motor 1 includes a drive shaft that rotates about a first axis 12. The output shaft 2 is used to connect a working attachment 140, and is driven by the motor 1 to rotate about a second axis 21. The shaft locking assembly 3 is used to restrict the rotation of the output shaft 2, and includes a first shaft locking member 31 and a second shaft locking member 32 that moves relative to the first shaft locking member 31. When the second shaft locking member 32 is in a first position, the second shaft locking member 32 is engaged with the first shaft locking member 31; when the second shaft locking member 32 is in a second position, the second shaft locking member 32 is disengaged from the first shaft locking member 31; when the second shaft locking member 32 is in the first or second position, the restriction on the rotation of the output shaft 2 is applied or released. The operating component 4 includes at least a first fixed state and a second fixed state. When the operating component 4 is in the first fixed state, it triggers the second shaft lock 32 to be in the first position and restricts the movement of the second shaft lock 32 to the second position. When it is in the second fixed state, it allows the second shaft lock 32 to be displaced from the first position to the second position.

[0040] When replacing the working accessory 140, the user adjusts the operating component 4 to the first fixed state, engaging the second shaft lock 32 with the first shaft lock 31 to lock the output shaft 2. After replacing the working accessory 140, the user adjusts the operating component 4 to the second fixed state, disengaging the second shaft lock 32 from the first shaft lock 31, releasing the output shaft 2, which can then be normally driven by the motor 1. This method effectively locks the output shaft 2, facilitating easy replacement of the working accessory 140 and simplifying the operation.

[0041] like Figure 3 As shown, in some embodiments, the second shaft locking member 32 includes a shaft locking rod 321 that engages or disengages from the first shaft locking member 31 and a drive member coupled to the operating component 4. When the operating component 4 switches between a first fixed state and a second fixed state, it triggers the drive member to move, thereby causing the shaft locking rod 321 to move relative to the first shaft locking member 31 along a direction perpendicular to the second axis 21 and a third axis 3212. When it is necessary to change the working accessory 140, the user controls the operating component 4 to switch between the first fixed state and the second fixed state. The drive member is triggered by the operating component 4 to move, thereby driving the shaft locking rod 321 to move, thus controlling the engagement or disengagement of the shaft locking rod 321 from the first shaft locking member 31. This method facilitates user operation.

[0042] like Figure 3As shown, in some embodiments, the driving component includes a driving base 322 connected to the shaft locking rod 321 and a first elastic element 323 interacting with the driving base 322. In the first fixed state, the operating component 4 drives the shaft locking rod 321 to engage with the first shaft locking member 31 via the driving base 322, and compresses the first elastic element 323 via the driving base 322. In the second fixed state, the first elastic element 323 drives the shaft locking rod 321 to disengage from the first shaft locking member 31 via the driving base 322. The first elastic element 323 is arranged in the first mounting cavity of the cover 6 of the power tool 100, with one end of the first elastic element 323 abutting against the bottom of the first mounting cavity. The first elastic element 323 is sleeved on and abuts against the driving base 322, and the driving base 322 is slidably disposed in the first mounting cavity. When the operating component 4 switches to the first fixed state, the drive base 322 moves relative to the cover 6 of the power tool 100 along the third axis 3212 toward the first shaft locking member 31, thereby engaging the shaft locking rod 321 with the first shaft locking member 31 and locking the output shaft 2. During this process, the first elastic member 323 is in a compressed and energy-storing state. When the operating component 4 switches from the first fixed state to the second fixed state, the first elastic member 323, under the action of its own elastic restoring force, pushes the drive base 322 to move away from the first shaft locking member 31 along the third axis 3212, causing the drive base 322 to separate the shaft locking rod 321 from the first shaft locking member 31. This configuration facilitates control of the shaft locking rod 321 via the operating component 4. The first elastic member 323 can be a compression spring.

[0043] like Figure 3As shown, in some embodiments, the first shaft locking member 31 is provided with a locking portion 312 for selective engagement or disengagement of the second shaft locking member 32. The driving member also includes a second elastic member 324 disposed within the driving base 322. The first end of the second elastic member 324 can apply pressure along the third axis 3212 direction to the shaft locking rod 321, and the second end of the second elastic member 324 can be subjected to pressure along the third axis 3212 direction applied by the operating component 4. During the process of switching the operating component 4 to the first fixed state, if the shaft locking rod 321 is not engaged with the locking portion 312, the second elastic member 324 is compressed; when the shaft locking rod 321 can engage with the locking portion 312, the second elastic member 324 drives the shaft locking rod 321 to engage with the locking portion 312. A second mounting cavity is provided in the drive base 322 along the direction of the third axis 3212. A second elastic member 324 is located in the second mounting cavity. A shaft locking rod 321 passes through the second mounting cavity, with one end of the shaft locking rod 321 extending out relative to the second mounting cavity. One end of the second elastic member 324 abuts against the end of the shaft locking rod 321 located in the second mounting cavity, and the other end of the second elastic member 324 abuts against the bottom surface of the second mounting cavity. When the operating component 4 switches to the first fixed state, if the shaft locking rod 321 is not aligned with the locking part 312 on the first shaft locking member 31, the shaft locking rod 321 abuts against the end face of the first shaft locking member 31. At this time, the second elastic member 324 is in a compressed and energy-storing state. As the user rotates the working accessory 140, the first shaft locking member 31 rotates synchronously until the locking part 312 is opposite to the shaft locking rod 321. At this time, under the elastic restoring force of the second elastic member 324, the shaft locking rod 321 moves along the second axis 21 toward the locking part 312, thereby engaging with the locking part 312 and cooperating with the first shaft locking member 31, thus locking the output shaft 2 and preventing it from rotating. This method reduces the difficulty for the user to replace the working accessory 140. During the replacement of the working accessory 140, it is not necessary to ensure that the locking part 312 and the shaft locking rod 321 are aligned to quickly lock the output shaft 2. The second elastic member 324 can be a compression spring.

[0044] In some embodiments, the second elastic member 324 also provides a biasing force that moves the first shaft locking member 31 toward the engaging locking portion 312. Since the center of the first shaft locking member 31 is not located on the axis of the second elastic member 324, the elastic restoring force of the second elastic member 324 after compression has a component acting tangentially to the first shaft locking member 31. During the user's replacement of the working accessory 140, if the shaft locking rod 321 is not aligned with the locking portion 312, the biasing force of the second elastic member 324 can cause the first shaft locking member 31 to deflect, allowing the shaft locking rod 321 to smoothly align and engage with the locking portion 312, thereby locking the output shaft 2.

[0045] like Figure 3As shown, in some embodiments, one end of the drive base 322 is provided with a first connecting portion 3221, and one end of the shaft locking rod 321 is provided with a second connecting portion 3211 that cooperates with the first connecting portion 3221. Since the second connecting portion 3211 is located in the second mounting cavity and abuts against the second elastic member 324, the end faces of the second connecting portion 3211 and the first connecting portion 3221 are in contact. The first connecting portion 3221 plays a limiting role, preventing the shaft locking rod 321 from separating from the drive base 322 under the action of the second elastic member 324. Moreover, when the drive base 322 moves along the third axis 3212 away from the first shaft locking member 31 under the action of the first elastic member 323, the first connecting portion 3221 can synchronously drive the second shaft locking member 312 to move, thereby causing the shaft locking rod 321 to separate from the locking portion 312.

[0046] like Figure 3 As shown, in some embodiments, the first shaft locking member 31 includes a shaft locking disc 311 formed or connected to the output shaft 2, with multiple locking portions 312 discretely arranged along the outer periphery of the shaft locking disc 311. By designing the first shaft locking member 31 as a shaft locking disc 311 and opening multiple locking portions 312 at circumferential intervals along the shaft locking disc 311, during the replacement of the working attachment 140, the working attachment 140 drives the output shaft 2 to rotate. The output shaft 2 drives the shaft locking disc 311 on it to rotate synchronously until any locking portion 312 aligns with the shaft locking rod 321. Under the action of the second elastic member 324, the shaft locking rod 321 engages with the locking portion 312, thereby locking the output shaft 2. Due to the arrangement of multiple locking portions 312, during the replacement of the working attachment 140, the engagement of the locking portion 312 with the shaft locking rod 321 can be quickly achieved, thereby quickly locking the output shaft 2 and improving the efficiency of replacing the working attachment 140.

[0047] like Figure 3As shown, in some embodiments, the operating component 4 is a cam structure 41 rotatable about a first pivot 61, and the operating component 4 is continuously in contact with the drive base 322 of the second shaft lock 32. The cam structure 41 includes at least one protrusion 411 and a smooth portion 412 opposite to the protrusion 411. In a first fixed state, the protrusion 411 of the operating component 4 contacts the second shaft lock 32 to trigger the second shaft lock 32 to be in a first position. In a second fixed state, the smooth portion 412 of the operating component 4 contacts the second shaft lock 32 to trigger the second shaft lock 32 to be in a second position. When the cam structure 41 of the operating component 4 is in the first fixed state, since the protrusion 411 abuts against the drive base 322 of the second shaft lock 32, the first elastic member 323 is compressed, and the first shaft lock 31 moves to the first position, enabling the shaft lock rod 321 to effectively engage with the locking portion 312. When the cam structure 41 of the operating component 4 is in the second fixed state, since the smooth part 412 is in contact with the driving base 322 of the second shaft locking member 32, the second shaft locking member 32 moves to the second position under the action of the first elastic member 323, causing the shaft locking rod 321 to disengage from the engaging part. By using the cam structure 41, it is only necessary to rotate the cam structure 41 to adjust the contact between the protrusion 411 or the smooth part 412 and the driving base 322 as needed, which is convenient to operate and has a simple structure.

[0048] like Figure 2 and Figure 3 As shown, in some embodiments, the operating component 4 further includes a lever 42 that can drive the cam structure 41 to rotate about the first rotating shaft 61. By setting the lever 42, the torque can be extended, thereby facilitating the adjustment and switching of the cam structure 41 to either the first fixed state or the second fixed state by rotating the lever 42.

[0049] like Figure 2 As shown, in some embodiments, the power tool 100 includes a working head 7 and a protective cover 6 that partially surrounds the working head 7; a first rotating shaft 61 is disposed on the protective cover 6. By partially surrounding the working head 7 with the protective cover 6, the working head 7 can be protected. The first rotating shaft 61 is disposed on the protective cover 6, which facilitates the arrangement of the cam structure 41 and does not occupy the internal space of the power tool 100.

[0050] When using power tools 100, it is sometimes necessary to use them in confined spaces. However, existing power tools 100 are too large to be suitable for use in such spaces. To solve this problem, such as... Figure 5 and Figure 6As shown, in some embodiments, the internal components of the power tool 100 are arranged in a reasonable manner. A battery pack connector 210 is provided near the motor housing 11. The battery pack connector 210 is used to install the battery pack 200. The length direction of the battery pack 200 is arranged substantially perpendicular to the first axis 12 of the drive shaft. The PCB board 130 for controlling the motor 1 is arranged in a direction substantially parallel to the first axis 12, and the PCB board 130 is close to the motor housing 11. In this way, the space around the motor housing 11 can be effectively utilized, so that after the battery pack 200 is installed, it is close to the motor housing 11, thereby shortening the distance between the battery pack 200 and the motor 1, improving the compactness of the power tool 100, reducing the size of the power tool 100, and meeting the needs of use in confined spaces. Moreover, since the motor 1 and the battery pack 200 are the heaviest components in the power tool 100, by shortening the distance between the battery pack 200 and the motor 1, the centers of gravity of the battery pack 200 and the motor 1 are brought closer together, thereby improving the balance of the power tool 100, making it easier for users to use, and improving the user experience.

[0051] When using power tool 100, due to its inherent inherent dangers, accidental contact by the user or others could cause personal injury. Therefore, power tool 100 typically incorporates a self-locking mechanism, consisting of a self-locking button and a spring. Under the action of the spring, the self-locking button keeps the trigger 120 of power tool 100 locked, preventing it from operating even if the user or others accidentally touch the trigger 120. To use power tool 100, the user must press and hold the self-locking button to unlock the trigger 120 before pressing it to start the tool. During this process, releasing the self-locking button causes it to reset under the spring's action, locking the trigger 120 again. This method is inconvenient for operation.

[0052] To solve the above problems, such as Figure 6 and Figure 8As shown, in some embodiments, a novel anti-locking assembly 5 is arranged on the power tool 100. The anti-locking assembly 5 includes a compression spring 53, a pressure plate 52, and an anti-locking switch 51. The pressure plate 52 is disposed on the housing 110 and can slide along a first direction. The compression spring 53 is located in the housing 110 of the power tool 100, and one end abuts against the pressure plate 52. The anti-locking switch 51 is disposed on the housing 110 and can slide relative to the housing 110 of the power tool 100 along a second direction. The anti-locking switch 51 has an unlocked position and a locked position. Under the action of the compression spring 53, the pressure plate 52 engages with the anti-locking switch 51, thereby placing the anti-locking switch 51 in the unlocked or locked position. When the power tool 100 needs to be used, the anti-locking switch 51 is toggled, causing the anti-locking switch 51 to switch from the locked position to the unlocked position. When the anti-locking switch 51 is switched to the unlocked position, the pressure plate 52 engages with the anti-locking switch 51 under the action of the spring 53, thereby locking the anti-locking switch 51 in the unlocked position. During the use of the power tool 100, the trigger 120 of the power tool 100 can be used normally without pressing the anti-locking switch 51. After using the power tool 100, the user can flip the anti-locking switch 51 again, switching it from the unlocked position to the locked position. When the anti-locking switch 51 is switched to the locked position, the pressure plate 52 engages with the anti-locking switch 51 under the action of the spring 53, thereby locking the anti-locking switch 51 in the locked position. Even if the user or others accidentally press the trigger 120 of the power tool 100 later, the trigger 120 will not be triggered, thus preventing safety accidents.

[0053] In some embodiments, a boss 521 is provided on the side of the pressure plate 52 facing the anti-locking switch 51, and a locking groove 511 corresponding to the locking position and an unlocking groove 512 corresponding to the unlocking position are provided on the side of the anti-locking switch 51 facing the pressure plate 52. Under the action of the compression spring 53, when the boss 521 engages with the locking groove 511, the anti-locking switch 51 is in the locked position, so that the trigger 120 of the power tool 100 is in a locked state and cannot be triggered; when the anti-locking switch 51 is moved, so that the boss 521 engages with the unlocking groove 512, the anti-locking switch 51 is in the unlocked position, at which time the trigger 120 of the power tool 100 is in an unlocked state and can be triggered at any time. In order to facilitate the smooth switching of the boss 521 between the locking groove 511 and the unlocking groove 512 during the movement of the anti-locking switch 51, the boss 521 is designed to be arc-shaped. In other embodiments, grooves may be provided on the pressure plate 52, and the bosses 521 corresponding to the locking position and the bosses 521 corresponding to the unlocking position may be provided on the anti-locking switch 51. No further restrictions are imposed here.

[0054] In some embodiments, to facilitate the installation of the compression spring 53 on the pressure plate 52, an annular protrusion is provided at one end of the pressure plate 52 facing the compression spring 53. The annular protrusion and the end face of the pressure plate 52 form a positioning annular groove, and one end of the compression spring 53 is located in the positioning annular groove. With the above arrangement, the position of the compression spring 53 relative to the pressure plate 52 can be defined, thereby ensuring that the compression spring 53 and the pressure plate 52 are effectively engaged.

[0055] In some embodiments, a leaf spring can be used instead of the pressure plate 52 and the compression spring 53. The leaf spring is fixedly mounted on the housing 110 of the power tool 100, and a boss 521 is formed at the end of the spring arm of the leaf spring. The boss 521 can engage with the locking groove 511 and the unlocking groove 512 on the anti-locking switch 51, which can also serve to limit the position of the anti-locking switch 51.

[0056] To ensure sufficient torque output from the power tool 100, a gearbox is typically installed within it, with the drive shaft of the motor 1 connected to the power input shaft of the gearbox. The output shaft 2 is supported on the gearbox cover. To ensure smooth rotation of the output shaft 2 relative to the cover, a bearing 22 is placed between the output shaft 2 and the cover. However, using only one bearing 22 requires a bearing with a large outer diameter to effectively provide support. This reduces the thickness of the gearbox cover, thus degrading the performance of the power tool 100. To address this issue, in some embodiments, two bearings 22 are fixedly mounted on the output shaft 2, both located between the output shaft 2 and the cover. Using two bearings 22 to support the output shaft 2 allows for the selection of bearings with smaller outer diameters compared to a single bearing 22, thereby reducing the outer diameter of the bearings and allowing for a larger design space for the cover thickness. By increasing the thickness of the housing cover, the strength of the housing cover can be guaranteed, thereby effectively supporting the output shaft 2 to output power, meeting the needs of larger cutting depths, and improving the user experience and service life of the protective cover 6 spring.

[0057] 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 power tool, characterized in that, include: The motor (1) includes a drive shaft that rotates about a first axis (12); An output shaft (2) is used to connect a working accessory (140); the output shaft (2) is driven by the motor (1) to rotate about a second axis (21); A shaft lock assembly (3) is used to restrict the rotation of the output shaft (2); The shaft locking assembly (3) includes a first shaft locking member (31) and a second shaft locking member (32) that moves relative to the first shaft locking member (31); When the second shaft locking member (32) is in the first position, the second shaft locking member (32) is engaged with the first shaft locking member (31); when the second shaft locking member (32) is in the second position, the second shaft locking member (32) is disengaged from the first shaft locking member (31); when the second shaft locking member (32) is in the first position or the second position, the restriction on the rotation of the output shaft (2) is applied or released; The operating component (4) includes at least a first fixed state and a second fixed state, and is configured to trigger the second shaft lock (32) to be in the first position and restrict the second shaft lock (32) from moving to the second position when in the first fixed state, and to allow the second shaft lock (32) to be displaced from the first position to the second position when in the second fixed state.

2. The power tool according to claim 1, characterized in that, The second shaft locking member (32) includes a shaft locking rod (321) that engages or disengages from the first shaft locking member (31) and a drive member coupled to the operating assembly (4); When the operating component (4) switches between the first fixed state and the second fixed state, it triggers the drive member to move, thereby driving the shaft locking rod (321) to move relative to the first shaft locking member (31) along the direction of the third axis (3212) perpendicular to the second axis (21).

3. The power tool according to claim 2, characterized in that, The drive unit includes a drive base (322) connected to the shaft locking rod (321) and a first elastic element (323) interacting with the drive base (322); When the operating component (4) is in the first fixed state, it drives the shaft locking rod (321) to engage with the first shaft locking member (31) through the driving base (322), and compresses the first elastic member (323) through the driving base (322). When the operating component (4) is in the second fixed state, the first elastic element (323) drives the shaft locking rod (321) to disengage from the first shaft locking element (31) through the driving base (322).

4. The power tool according to claim 3, characterized in that, The first shaft locking member (31) is provided with a locking part (312) that allows the second shaft locking member (32) to be selectively engaged or disengaged; The drive unit further includes a second elastic element (324) disposed within the drive base (322). The first end of the second elastic element (324) can apply pressure along the direction of the third axis (3212) on the shaft locking rod (321), and the second end of the second elastic element (324) can be subjected to pressure along the direction of the third axis (3212) applied by the operating component (4). During the process of switching the operating component (4) to the first fixed state, if the shaft locking rod (321) is not engaged with the locking part (312), the second elastic member (324) is compressed; when the shaft locking rod (321) can engage with the locking part (312), the second elastic member (324) drives the shaft locking rod (321) to engage with the locking part (312).

5. The power tool according to claim 4, characterized in that, The second elastic member (324) also provides a biasing force that moves the first shaft locking member (31) toward engaging the locking portion (312).

6. The power tool according to claim 4, characterized in that, One end of the drive base (322) is provided with a first connecting part (3221), and one end of the shaft locking rod (321) is provided with a second connecting part (3211) that cooperates with the first connecting part (3221).

7. The power tool according to claim 4, characterized in that, The first shaft locking member (31) includes a shaft locking disc (311) formed or connected on the output shaft (2), and a plurality of locking portions (312) are discretely arranged along the outer periphery of the shaft locking disc (311).

8. The power tool according to any one of claims 1-7, characterized in that, The operating component (4) is a cam structure (41) that can rotate around the first rotating shaft (61), and the operating component (4) is in continuous contact with the second shaft locking member (32); The cam structure (41) includes at least one protrusion (411) and a smooth portion (412) opposite to the protrusion (411); In the first fixed state, the protrusion (411) of the operating component (4) contacts the second shaft locking member (32) to trigger the second shaft locking member (32) to be in the first position; In the second fixed state, the smooth portion (412) of the operating component (4) contacts the second shaft locking member (32) to trigger the second shaft locking member (32) to be in the second position.

9. The power tool according to claim 8, characterized in that, The operating component (4) also includes a lever (42) that can drive the cam structure (41) to rotate around the first rotating shaft (61).

10. The power tool according to claim 8, characterized in that, The power tool (100) includes a working head (7) and a protective cover (6) that partially surrounds the working head (7); the first rotating shaft (61) is disposed on the protective cover (6).

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