Power tool

Abstract

The application discloses a power tool, which comprises a housing, a motor arranged to generate driving force by rotating around a first axis, an output shaft arranged to connect a working accessory, the output shaft being driven by the motor to rotate the working accessory, a shaft lock mechanism operable to lock the output shaft when the motor is stopped, and a switch assembly operable to control the motor to start running, wherein when the switch assembly is operated to start the motor to run, the operation of the switch assembly can unlock the locking of the output shaft by the shaft lock mechanism. The application facilitates quick replacement of the working accessory and eliminates the risk of locked-rotor start.

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. These tools include, but are not limited to, electric drills, impact drills, impact wrenches, impact screwdrivers, and miter saws. Electric drills and impact drills can be equipped 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; and miter saws can cut objects at specific angles. Using power tools can improve work efficiency and reduce labor intensity.

[0003] When replacing the saw blade on a mitered saw, one method involves holding down the shaft lock button with one hand while using the other to control the lower guard and loosen the saw blade locking screw with a wrench. The saw blade is then removed, replaced, and the locking screw is tightened. This method requires one hand and is inconvenient. Another method involves locking the shaft lock button, which is then held in place by a spring mechanism or other components, allowing both hands to work together to replace the saw blade. However, customers sometimes forget to reset the shaft lock, causing the machine to stall and preventing startup.

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

[0005] One objective of this application is to solve or at least alleviate some or all of the aforementioned problems.

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

[0007] A power tool, comprising:

[0008] case;

[0009] The motor is configured to rotate around a first axis to generate driving force.

[0010] An output shaft is configured to connect to a working accessory, and the output shaft can be driven by the motor to rotate the working accessory.

[0011] A shaft locking mechanism that can be operated to lock the output shaft when the motor is stopped;

[0012] A switching assembly that can be operated to control the motor to start and operate;

[0013] When the switch assembly is operated to start the motor, the operation of the switch assembly can unlock the shaft locking mechanism from locking the output shaft.

[0014] In some embodiments, the shaft locking mechanism includes a first operating member, a first locking member, and a second locking member. The first operating member is operable to move along a first direction. The first locking member is connected to the first operating member and can be driven by the first operating member to move along the first direction to lock the output shaft. The second locking member can move along a second direction to the first operating member to prevent the first operating member from moving in the opposite direction along the first direction, so as to maintain the locked state of the first locking member.

[0015] In some embodiments, a second operating element is further included, the second operating element being operable to move along a third direction to release the second locking element from locking the first operating element, thereby enabling the first operating element to move in the opposite direction to release the locking state of the first locking element.

[0016] In some embodiments, the shaft locking mechanism further includes a first elastic element, which is fixed between the first limiting rib formed in the housing and the second locking element with sustained elastic force. The first operating member is provided with a locking hole. When the first operating member moves along the first direction until the locking hole is aligned with the second locking element, the sustained elastic force of the first elastic element pushes the second locking element to move along the second direction and engage with the locking hole.

[0017] In some embodiments, the shaft locking mechanism further includes a second elastic element, which is sleeved on the first locking element. One end of the second elastic element abuts against the second limiting rib formed by the housing, and the other end abuts against the bottom of the first operating member. The first operating member is provided with a locking hole. When the second locking member is operated to move in the reverse direction, the second locking member moves out of the locking hole. The elastic force of the second elastic element pushes the first operating member to drive the first locking member to move in the reverse direction, thereby releasing the locking state of the first locking member.

[0018] In some embodiments, the shaft locking mechanism further includes a connector, one end of which is fixedly connected to the switch assembly and the other end of which is fixedly connected to the second locking member. The pivoting caused by the operation of the switch assembly is converted by the connector into a displacement of the second locking member in the opposite direction along the second direction.

[0019] In some embodiments, a locking wheel is further included, the locking wheel being fixed to the output end of the output shaft, the locking wheel having a pin hole, and the first locking member moving along the first direction to engage with the pin hole to lock the locking wheel.

[0020] In some embodiments, the output shaft is configured as the rotor shaft of the motor; the first locking member is directly sleeved on the output shaft, the first locking member includes a clearance space and a locking space communicating with the clearance space, and during the movement of the first operating member along the first direction, the periphery of the output shaft switches from the clearance space to the locking space.

[0021] In some embodiments, the first operating member and the first locking member are integrally formed.

[0022] A power tool, comprising:

[0023] The motor is configured to rotate around a first axis to generate driving force.

[0024] An output shaft is configured to connect to a working accessory, and the output shaft can be driven by the motor to rotate the working accessory.

[0025] A shaft locking mechanism that can be operated to lock the output shaft when the motor is stopped;

[0026] A switching assembly that can be operated to control the start and operation of the motor;

[0027] The shaft locking mechanism is configured to unlock the output shaft in at least two ways.

[0028] In some embodiments, the shaft locking mechanism includes a first operating member, a first locking member, and a second locking member. The first operating member is configured to be operable to move along a first direction. The first locking member is connected to the first operating member and can be driven by the first operating member to move along the first direction to lock the output shaft. The second locking member can move along a second direction to the first operating member to prevent the first operating member from moving in the opposite direction along the first direction, so as to maintain the locked state of the first locking member.

[0029] In some embodiments, the second locking member is configured to be directly operated to move in the opposite direction along the second direction to unlock the locked state of the first locking member.

[0030] In some embodiments, the second locking member is configured to be indirectly operated to move in the opposite direction along the second direction to unlock the locked state of the first locking member.

[0031] A power tool, comprising:

[0032] The motor is configured to rotate around a first axis to generate driving force.

[0033] An output shaft is configured to connect to a working accessory, and the output shaft can be driven by the motor to rotate the working accessory.

[0034] A shaft locking mechanism that can be operated to lock the output shaft when the motor is stopped;

[0035] A switching assembly that can be operated to control the start and operation of the motor;

[0036] Also includes:

[0037] A connector is configured to connect the switch assembly and the shaft locking mechanism;

[0038] When the switch assembly is operated to start the motor, the connector can drive the shaft locking mechanism to unlock the output shaft.

[0039] In some embodiments, the shaft locking mechanism includes a first operating member, a first locking member, and a second locking member. The first operating member is operable to move along a first direction. The first locking member is connected to the first operating member and can be driven by the first operating member to move along the first direction to lock the output shaft. The second locking member can move along a second direction to the first operating member to prevent the first operating member from moving in the opposite direction along the first direction, so as to maintain the locked state of the first locking member.

[0040] In some embodiments, a second operating element is further included, the second operating element being operable to move along a third direction to release the second locking element from locking the first operating element, thereby enabling the first operating element to move in the opposite direction to release the locking state of the first locking element.

[0041] In some embodiments, a locking wheel is further included, the locking wheel being fixed to the output end of the output shaft, the locking wheel having a pin hole, and the first locking member moving along the first direction to engage with the pin hole to lock the locking wheel.

[0042] In some embodiments, the output shaft is configured as the rotor shaft of the motor; the first locking member is directly sleeved on the output shaft, the first locking member includes a clearance space and a locking space communicating with the clearance space, and during the movement of the first operating member along the first direction, the periphery of the output shaft switches from the clearance space to the locking space.

[0043] In some embodiments, the first operating member and the first locking member are integrally formed.

[0044] The advantages of this application are:

[0045] This application provides an electric tool in which a motor rotates around a first axis to generate driving force, thereby driving a working attachment connected to an output shaft to rotate. A shaft locking mechanism locks the output shaft, and a switch assembly controls the motor to start operation. Furthermore, when the switch assembly is activated to start the motor, operation of the switch assembly unlocks the shaft locking mechanism from the output shaft. When it is necessary to change the working attachment, the shaft locking mechanism secures the output shaft, freeing the user's hands for faster and more convenient attachment replacement. After the attachment replacement is complete, when using the electric tool, operating the switch assembly to start the motor simultaneously unlocks the shaft locking mechanism from the output shaft. This ensures that even if the user forgets to unlock the shaft locking mechanism, it can still be unlocked during use, eliminating the risk of stalling upon startup. Attached Figure Description

[0046] Figure 1 This is a partial structural diagram of a power tool;

[0047] Figure 2 This is a partial structural diagram of a power tool from another perspective;

[0048] Figure 3 This is a cross-sectional view of a power tool with the output shaft in a locked state;

[0049] Figure 4 This is a schematic diagram of operating a second operating element in a power tool;

[0050] Figure 5 This is a schematic diagram of a power tool that is unlocked via a switch assembly;

[0051] Figure 6 This is a cross-sectional view of a power tool with the output shaft in the unlocked state;

[0052] Figure 7 This is a schematic diagram of an output shaft in the unlocked state in a power tool;

[0053] Figure 8 This is a partial structural diagram of a power tool from another perspective;

[0054] Figure 9 This is a structural diagram of another type of first locking element used in a power tool to lock the output shaft.

[0055] Figure 10 This is a structural diagram of another type of first locking element in a power tool for unlocking the output shaft;

[0056] Figure 11 This is a schematic diagram of another first locking element in a power tool for unlocking the output shaft.

[0057] In the picture:

[0058] 1. Housing; 11. First limiting rib; 12. Second limiting rib; 13. Limiting part; 2. Motor; 21. First axis; 3. Output shaft; 4. Shaft locking mechanism; 41. First operating member; 411. Locking hole; 42. First locking member; 421. Clearance space; 422. Locking space; 43. Second locking member; 44. First elastic member; 45. Second elastic member; 46. Connecting member; 47. Fixing member; 5. Switch assembly; 51. Trigger; 6. Second operating member; 7. Locking wheel; 71. Shaft pin hole; 8. Working accessory. Detailed Implementation

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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 ​​not using 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.

[0064] 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.

[0065] 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.

[0066] In this application, the terms "device," "module," or "unit" are used to describe devices that can be implemented in hardware or software to perform a specific function.

[0067] Power tools typically integrate a motor, working attachments, and a control panel containing electronic components into a single housing. The working attachments are used to perform the tasks. In practical applications, by changing different working attachments, power tools can function as lawnmowers, snowplows, tampers, water trucks, pressure washers, saws, etc., playing an important role in various fields such as horticulture, construction, agriculture, and daily life. Power tools can also be table saws, such as table saws, miter saws, circular saws, metal cutters, bakelite milling machines, edge trimmers, and marble cutters. Alternatively, power tools can also be sanding tools, such as angle grinders and sanders.

[0068] In this embodiment, the power tool is a type of power tool that operates using direct current (DC) or alternating current (AC). The power tool uses a rechargeable battery pack as its power source. In this embodiment, the battery pack is a battery module, which, in conjunction with a corresponding power circuit, supplies power to the power tool. Those skilled in the art will understand that in other embodiments, the power tool 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, provides power to the corresponding components of the power tool.

[0069] To prevent the working attachments of power tools from rotating when they wear out or are damaged and need to be replaced, a shaft lock button is usually installed on the power tool. The shaft lock button locks the output shaft, thus preventing rotation during attachment removal and replacement. Depending on the arrangement of the shaft lock button, there are generally two operating methods. One method involves holding the shaft lock button down with one hand while the other hand controls the lower guard and uses a wrench to loosen the locking screw, removing the working attachment, replacing it, and then tightening the locking screw. The other method involves locking the shaft lock button, and then using a spring mechanism or other components to keep the shaft lock in the locked state, allowing both hands to work together to replace the working attachment. The first method is inconvenient as it requires one hand to operate, resulting in lower disassembly and assembly efficiency. The second method is problematic because customers may sometimes forget to reset the shaft lock, leading to stalling and preventing the machine from starting.

[0070] To solve the above problems, while facilitating and quickly changing working accessories and eliminating the risk of stalling during startup, such as... Figures 1-11 As shown, this application provides an electric tool. The electric tool includes a housing 1, a motor 2, an output shaft 3, a shaft locking mechanism 4, and a switch assembly 5.

[0071] The motor 2 is configured to rotate around the first axis 21 to generate driving force. The output shaft 3 is configured to connect to the working attachment 8, and the output shaft 3 can be driven by the motor 2 to drive the working attachment 8 to rotate. The shaft locking mechanism 4 can be operated to lock the output shaft 3 when the motor 2 is stopped. The switch assembly 5 can be operated to control the start of the motor 2. When the switch assembly 5 is operated to start the motor 2, the operation of the switch assembly 5 can unlock the shaft locking mechanism 4 from locking the output shaft 3.

[0072] When it is necessary to replace the working attachment 8, the output shaft 3 is locked using the shaft locking mechanism 4. With the output shaft 3 fixed, the customer can freely replace the working attachment 8, making the replacement faster and more convenient. After the working attachment 8 has been replaced, when using the power tool, the shaft locking mechanism 4 can be simultaneously unlocked when the switch assembly 5 is operated to start the motor 2. This ensures that even if the customer forgets to unlock the shaft locking mechanism 4, it can still be unlocked during use, eliminating the risk of stalling during startup.

[0073] like Figure 3 and Figure 7 As shown, in some embodiments, the shaft locking mechanism 4 includes a first operating member 41, a first locking member 42, and a second locking member 43. The first operating member 41 is operable to move along a first direction. The first locking member 42 is connected to the first operating member 41. The first locking member 42 can be driven by the first operating member 41 to move along the first direction to lock the output shaft 3. The second locking member 43 can move along a second direction to the first operating member 41 to prevent the first operating member 41 from moving in the opposite direction along the first direction, thus maintaining the locked state of the first locking member 42. When it is necessary to replace the working accessory 8, the customer moves the first operating member 41 along the first direction, thereby driving the first locking member 42 to move along the first direction to lock the output shaft 3. At the same time, the second locking member 43 moves along the second direction to lock the first operating member 41, so that the output shaft 3 is stably kept in a locked state. The customer's hands can be freed to perform the work accessory 8 replacement work, ensuring the efficiency of the replacement.

[0074] like Figures 1-4 As shown, in some embodiments, the power tool further includes a second operating member 6, which is operable to move along a third direction to release the second locking member 43 from locking the first operating member 41, allowing the first operating member 41 to move in the opposite direction to release the locking state of the first locking member 42. After the customer completes the replacement of the working accessory 8, by moving the second operating member 6 along a third direction, the second locking member 43 can be released from locking the first operating member 41, allowing the first operating member 41 to move in the opposite direction to release the first locking member 42, thereby releasing the lock on the output shaft 3. By operating the second operating member 6, the same function as operating the switch assembly 5 can be achieved, realizing a redundant design and enabling two ways to unlock the output shaft 3. The customer can unlock the output shaft 3 by consciously operating the second operating member 6 or unconsciously by operating the switch assembly 5, thereby eliminating the risk of stalling during startup.

[0075] like Figure 3As shown, in some embodiments, the shaft locking mechanism 4 further includes a first elastic element 44. The first elastic element 44 is fixed between the first limiting rib 11 and the second locking element 43 formed in the housing 1 with a sustained elastic force. The first operating member 41 is provided with a locking hole 411. When the first operating member 41 moves along the first direction until the locking hole 411 is aligned with the second locking element 43, the sustained elastic force of the first elastic element 44 pushes the second locking element 43 to move along the second direction and engage with the locking hole 411. The first elastic element 44 can be a compression spring, and the first elastic element 44 is in a compressed state. When the first operating member 41 moves along the first direction until the locking hole 411 is aligned with the second locking element 43, the first locking element 42 locks the output shaft 3. Under the action of its own elastic force, the first elastic element 44 pushes the second locking element 43 to engage with the locking hole 411, thereby locking the first operating member 41, so that the first locking element 42 connected to the first operating member 41 is stably engaged with the output shaft 3.

[0076] like Figure 6 As shown, in some embodiments, the shaft locking mechanism 4 further includes a second elastic element 45, which is sleeved on the first locking element 42. One end of the second elastic element 45 abuts against the second limiting rib 12 formed by the housing 1, and the other end of the second elastic element 45 abuts against the bottom of the first operating member 41. The first operating member 41 is provided with a locking hole 411. When the second locking member 43 is operated to move in the reverse direction in the second direction, the second locking member 43 moves out of the locking hole 411. The elastic force of the second elastic element 45 pushes the first operating member 41 to drive the first locking member 42 to move in the reverse direction in the first direction, releasing the locked state of the first locking member 42. The second elastic element 45 can be a compression spring. During the process of the first operating member 41 moving in the first direction to drive the first locking member 42 to lock the output shaft 3, the second elastic element 45 is compressed and in an energy storage state. When the second locking member 43 releases its lock on the first operating member 41, the second elastic member 45 pushes the first operating member 41 to reset under its own elastic force, thereby releasing the first locking member 42 connected to the first operating member 41 from locking the output shaft 3.

[0077] like Figures 3-7As shown, in some embodiments, the shaft locking mechanism 4 further includes a connecting member 46. One end of the connecting member 46 is fixedly connected to the switch assembly 5, and the other end is fixedly connected to the second locking member 43. The pivoting caused by the operation of the switch assembly 5 is converted into a displacement of the second locking member 43 in the opposite direction along the second direction through the connecting member 46. The switch assembly 5 may include an operable switch, such as a trigger 51 or a button, that can be operated to start a motor, or a locking member that can lock the operable switch as a safety switch. One end of the connecting member 46 is connected to the operable switch or the locking member. Taking the trigger 51 as an example, when the customer presses the trigger 51, the trigger 51 pivots relative to the housing 1, thereby pulling the second locking member 43 to move in the opposite direction along the second direction through the connecting member 46, causing the second locking member 43 to release the lock on the first operating member 41. In other embodiments, the switch assembly 5 may also be designed to move relative to the housing 1. Taking trigger 51 as an example, during the process of the customer operating trigger 51 to move relative to housing 1, the second locking member 43 can also be moved by the connecting member 46 to release the lock on the first operating member 41.

[0078] In some embodiments, the connector 46 can be designed to be rigid, flexible, or partially rigid and partially flexible, and can be made of materials such as metal or carbon fiber. There are no specific limitations on the shape and material of the connector 46. In this application, the connector 46 uses steel wire rope, which ensures strength while possessing a certain degree of flexibility, facilitating its arrangement within the housing 1.

[0079] like Figure 3 , Figure 6 and Figure 7 As shown, in some embodiments, a fixing member 47 is fixedly disposed on the connector 46, and a limiting part 13 is fixedly disposed in the housing 1. The connector 46 passes through the limiting part 13 and is connected to the second locking member 43. The second operating member 6 and the fixing member 47 are located on both sides of the limiting part 13. When the second locking member 43 locks the first operating member 41, the fixing member 47 is in contact with the limiting part 13. When the switch assembly 5 is operated, thereby moving the second locking member 43 through the connector 46, the fixing member 47 moves away from the limiting part 13. When the second operating member 6 is operated to move the connector 46, thereby unlocking the first operating member 41, the limiting part 13 limits the position of the fixing member 47, causing the portion of the connector 46 extending out of the limiting part 13 and connected to the second locking member 43 to move, thereby effectively moving the second locking member 43 and unlocking the first operating member 41.

[0080] like Figure 6 and Figure 7As shown, in some embodiments, the power tool further includes a locking wheel 7, which is fixed to the output end of the output shaft 3. The locking wheel 7 has a pin hole 71, and the first locking member 42 moves along a first direction to engage with the pin hole 71 to lock the locking wheel 7. By engaging the first locking member 42 with the pin hole 71, the output shaft 3 can be locked, thereby freeing the customer's hands when disassembling and assembling the working accessory 8, allowing for quick disassembly and assembly. Multiple pin holes 71 can be spaced apart on the locking wheel 7 to facilitate the engagement of the first locking member 42 with the locking wheel 7.

[0081] like Figures 9-11 As shown, in some embodiments, the output shaft 3 is configured as the rotor shaft of the motor 2; the first locking member 42 is directly sleeved on the output shaft 3. The first locking member 42 includes a clearance space 421 and a locking space 422 communicating with the clearance space 421. During the movement of the first operating member 41 along the first direction, the periphery of the output shaft 3 switches from the clearance space 421 to the locking space 422. The area of ​​the locking space 422 is smaller than that of the clearance space 421, and the radius of the arc corresponding to the clearance space 421 is larger than the radius of the output shaft 3. The locking space 422 is a U-shaped groove. During the movement of the first operating member 41 along the first direction by the customer, the output shaft 3 switches into the locking space 422, so that the first locking member 42 engages with the output shaft 3 to lock the output shaft 3.

[0082] like Figure 9 As shown, in some embodiments, the second operating member 6 and the second locking member 43 can be designed as an integrated structure. The second operating member 6 extends relative to the housing 1 and is operable to move in a second direction to release the second locking member 43 from locking the first operating member 41, allowing the first operating member 41 to move in the opposite direction of the first direction to release the locked state of the first locking member 42. By operating the second operating member 6, the same function as operating the switch assembly 5 can be achieved, realizing a redundant design and enabling two ways to unlock the output shaft 3. The customer can unlock the output shaft 3 by consciously operating the second operating member 6 or unconsciously by operating the switch assembly 5, thereby eliminating the risk of stalling during startup. Moreover, designing the second operating member 6 and the second locking member 43 as an integrated structure facilitates manufacturing.

[0083] like Figure 3 and Figure 9 As shown, in some embodiments, the first operating member 41 and the first locking member 42 are integrally formed. This arrangement ensures the strength of the connection between the first operating member 41 and the first locking member 42, while also facilitating manufacturing.

[0084] like Figures 1-11 As shown, this application also provides an electric tool, including a motor 2, an output shaft 3, a shaft locking mechanism 4, and a switch assembly 5.

[0085] The motor 2 is configured to rotate around a first axis 21 to generate driving force. The output shaft 3 is configured to connect to the working attachment 8, and the output shaft 3 can be driven by the motor 2 to rotate the working attachment 8. The shaft locking mechanism 4 can be operated to lock the output shaft 3 when the motor 2 is stopped, and the shaft locking mechanism 4 is configured to unlock the output shaft 3 by at least two methods. The switch assembly 5 can be operated to start the motor 2.

[0086] When it is necessary to replace the working accessory 8, the output shaft 3 is locked using the shaft locking mechanism 4. With the output shaft 3 fixed, the customer can free their hands to replace the working accessory 8, making the replacement faster and more convenient. After the working accessory 8 has been replaced, there are at least two ways to unlock the output shaft 3 when using power tools, allowing the customer to choose either method to release the lock. During operation, the shaft locking mechanism 4 can still effectively unlock the output shaft 3, eliminating the risk of stalling during startup.

[0087] like Figure 3 , Figure 6 and Figure 7 As shown, in some embodiments, the shaft locking mechanism 4 includes a first operating member 41, a first locking member 42, and a second locking member 43. The first operating member 41 is operable to move along a first direction; the first locking member 42 is connected to the first operating member 41 and can be moved along the first direction by the first operating member 41 to lock the output shaft 3. The second locking member 43 can move along a second direction to the first operating member 41 to prevent the first operating member 41 from moving in the opposite direction along the first direction, thus maintaining the locked state of the first locking member 42. When it is necessary to replace the working accessory 8, the customer moves the first operating member 41 along the first direction, thereby moving the first locking member 42 along the first direction to lock the output shaft 3. At the same time, the second locking member 43 moves along the second direction to lock the first operating member 41, so that the output shaft 3 is stably kept in a locked state. The customer's hands can be freed to perform the work accessory 8 replacement work, ensuring the efficiency of the replacement.

[0088] like Figure 4 As shown, in some embodiments, the second locking member 43 is configured to be directly operated to move in the reverse direction in the second direction to unlock the locked state of the first locking member 42. The second locking member 43 can be moved in the reverse direction in the second direction by the customer's direct operation, thereby releasing the lock on the first locking member 42, leaving the output shaft 3 in the unlocked state, and allowing the power tool to operate normally.

[0089] like Figure 5As shown, in some embodiments, the second locking member 43 is configured to be indirectly operated to move in the reverse direction in a second direction to unlock the locked state of the first locking member 42. A connector 46 can be used, with one end connected to the second locking member 43 and the other end connected to the switch assembly 5. The pivoting of the switch assembly 5 caused by the customer's operation can be converted into a displacement of the second locking member 43 in the reverse direction in the second direction through the connector 46. The switch assembly 5 can include an operable switch, such as a trigger 51, a button, or other switch that can be operated to start the motor, or it can include a locking member that can lock the operable switch as a safety switch. In the above manner, the locking of the first operating member 41 can also be released, thereby unlocking the first locking member 42 from the output shaft 3, and the power tool can work normally.

[0090] like Figures 1-11 As shown, this application also provides an electric tool, including a motor 2, an output shaft 3, a shaft locking mechanism 4, a switch assembly 5, and a connector 46.

[0091] The motor 2 is configured to rotate around the first axis 21 to generate driving force. The output shaft 3 is configured to connect to the working attachment 8, and the output shaft 3 can be driven by the motor 2 to drive the working attachment 8 to rotate. The shaft locking mechanism 4 can be operated to lock the output shaft 3 when the motor 2 is stopped. The switch assembly 5 can be operated to start the motor 2. The connector 46 is configured to connect the switch assembly 5 and the shaft locking mechanism 4. When the switch assembly 5 is operated to start the motor 2, the connector 46 can drive the shaft locking mechanism 4 to unlock the lock on the output shaft 3.

[0092] When it is necessary to replace the working attachment 8, the output shaft 3 is locked using the shaft locking mechanism 4. With the output shaft 3 fixed, the customer can freely replace the working attachment 8, making the replacement faster and more convenient. After the working attachment 8 is replaced, when using the power tool, the switch assembly 5 can simultaneously unlock the shaft locking mechanism 4's lock on the output shaft 3 via the connector 46 when the switch assembly 5 is operated to start the motor 2. This means that even if the customer forgets to unlock the shaft locking mechanism 4, it can still be unlocked during use, eliminating the risk of stalling during startup.

[0093] 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. An electric tool, comprising: Shell (1); The motor (2) is configured to rotate around the first axis (21) to generate driving force; The output shaft (3) is configured to connect to the working attachment (8), and the output shaft (3) can be driven by the motor (2) to drive the working attachment (8) to rotate; A shaft locking mechanism (4) can be operated to lock the output shaft (3) when the motor (2) is stopped; The switch assembly (5) can be operated to control the motor (2) to start running; Its features are, When the switch assembly (5) is operated to start the motor (2), the operation of the switch assembly (5) can unlock the shaft locking mechanism (4) from locking the output shaft (3).

2. The power tool according to claim 1, characterized in that, The shaft locking mechanism (4) includes a first operating member (41), a first locking member (42), and a second locking member (43). The first operating member (41) is configured to be operable to move along a first direction. The first locking member (42) is connected to the first operating member (41) and can be driven by the first operating member (41) to move along the first direction to lock the output shaft (3). The second locking member (43) can move along a second direction to the first operating member (41) to block the first operating member (41) from moving in the opposite direction along the first direction, so as to maintain the locked state of the first locking member (42).

3. A power tool according to claim 2, characterized in that, It also includes a second operating element (6), which is configured to be operable to move along a third direction to release the second locking element (43) from locking the first operating element (41), so that the first operating element (41) can move in the opposite direction of the first direction to release the locking state of the first locking element (42).

4. A power tool according to claim 2, characterized in that, The shaft locking mechanism (4) further includes a first elastic element (44), which is fixed between the first limiting rib (11) formed in the housing (1) and the second locking element (43) with a sustained elastic force. The first operating element (41) is provided with a locking hole (411). When the first operating element (41) moves along the first direction until the locking hole (411) is aligned with the second locking element (43), the sustained elastic force of the first elastic element (44) pushes the second locking element (43) to move along the second direction and engage with the locking hole (411).

5. A power tool according to claim 2, characterized in that, The shaft locking mechanism (4) further includes a second elastic element (45), which is sleeved on the first locking element (42). One end of the second elastic element (45) abuts against the second limiting rib (12) formed by the housing (1), and the other end abuts against the bottom of the first operating element (41). The first operating element (41) is provided with a locking hole (411). When the second locking element (43) is operated to move in the reverse direction, the second locking element (43) moves out of the locking hole (411), and the elastic force of the second elastic element (45) pushes the first operating element (41) to drive the first locking element (42) to move in the reverse direction, thereby releasing the locked state of the first locking element (42).

6. A power tool according to claim 2, characterized in that, The shaft locking mechanism (4) further includes a connector (46), one end of which is fixedly connected to the switch assembly (5) and the other end is fixedly connected to the second locking member (43). The pivoting caused by the operation of the switch assembly (5) is converted into a displacement of the second locking member (43) in the opposite direction along the second direction through the connector (46).

7. A power tool according to claim 2, characterized in that, It also includes a locking wheel (7), which is fixed to the output end of the output shaft (3). The locking wheel (7) is provided with a shaft pin hole (71). The first locking member (42) moves along the first direction and engages with the shaft pin hole (71) to lock the locking wheel (7).

8. A power tool according to claim 2, characterized in that, The output shaft (3) is configured as the rotor shaft of the motor (2); the first locking member (42) is directly sleeved on the output shaft (3). The first locking member (42) includes a clearance space (421) and a locking space (422) communicating with the clearance space (421). During the movement of the first operating member (41) along the first direction, the periphery of the output shaft (3) switches from the clearance space (421) to the locking space (422).

9. A power tool according to claim 2, characterized in that, The first operating member (41) and the first locking member (42) are integrally formed.

10. An electric tool, comprising: The motor (2) is configured to rotate around the first axis (21) to generate driving force; The output shaft (3) is configured to connect to the working attachment (8), and the output shaft (3) can be driven by the motor (2) to drive the working attachment (8) to rotate; A shaft locking mechanism (4) can be operated to lock the output shaft (3) when the motor (2) is stopped; The switch assembly (5) can be operated to control the motor (2) to start running; Its features are, The shaft locking mechanism (4) is configured to unlock the output shaft (3) by at least two methods.

11. A power tool according to claim 10, characterized in that, The shaft locking mechanism (4) includes a first operating member (41), a first locking member (42), and a second locking member (43). The first operating member (41) is configured to be operable to move along a first direction. The first locking member (42) is connected to the first operating member (41) and can be driven by the first operating member (41) to move along the first direction to lock the output shaft (3). The second locking member (43) can move along a second direction to the first operating member (41) to block the first operating member (41) from moving in the opposite direction along the first direction, so as to maintain the locked state of the first locking member (42).

12. A power tool according to claim 11, characterized in that, The second locking member (43) is configured to be directly operated to move in the opposite direction along the second direction to unlock the locked state of the first locking member (42).

13. A power tool according to claim 11, characterized in that, The second locking member (43) is configured to be indirectly operated to move in the opposite direction along the second direction to unlock the locked state of the first locking member (42).

14. An electric tool, comprising: The motor (2) is configured to rotate around the first axis (21) to generate driving force; The output shaft (3) is configured to connect to the working attachment (8), and the output shaft (3) can be driven by the motor (2) to drive the working attachment (8) to rotate; A shaft locking mechanism (4) can be operated to lock the output shaft (3) when the motor (2) is stopped; The switch assembly (5) can be operated to control the motor (2) to start running; Its characteristic is that it further includes: A connector (46) is configured to connect the switch assembly (5) and the shaft locking mechanism (4); When the switch assembly (5) is operated to start the motor (2), the connector (46) can drive the shaft locking mechanism (4) to unlock the lock on the output shaft (3).

15. A power tool according to claim 14, characterized in that, The shaft locking mechanism (4) includes a first operating member (41), a first locking member (42), and a second locking member (43). The first operating member (41) is configured to be operable to move along a first direction. The first locking member (42) is connected to the first operating member (41) and can be driven by the first operating member (41) to move along the first direction to lock the output shaft (3). The second locking member (43) can move along a second direction to the first operating member (41) to block the first operating member (41) from moving in the opposite direction along the first direction, so as to maintain the locked state of the first locking member (42).

16. A power tool according to claim 15, characterized in that, It also includes a second operating element (6), which is configured to be operable to move along a third direction to release the second locking element (43) from locking the first operating element (41), so that the first operating element (41) can move in the opposite direction of the first direction to release the locking state of the first locking element (42).

17. A power tool according to claim 15, characterized in that, It also includes a locking wheel (7), which is fixed to the output end of the output shaft (3). The locking wheel (7) is provided with a shaft pin hole (71). The first locking member (42) moves along the first direction and engages with the shaft pin hole (71) to lock the locking wheel (7).

18. A power tool according to claim 15, characterized in that, The output shaft (3) is configured as the rotor shaft of the motor (2); the first locking member (42) is directly sleeved on the output shaft (3). The first locking member (42) includes a clearance space (421) and a locking space (422) communicating with the clearance space (421). During the movement of the first operating member (41) along the first direction, the periphery of the output shaft (3) switches from the clearance space (421) to the locking space (422).

19. A power tool according to claim 15, characterized in that, The first operating member (41) and the first locking member (42) are integrally formed.

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