Power tool

Abstract

This application relates to the field of tool technology and discloses a power tool. The power tool includes a drive assembly and a cutting assembly. The drive assembly includes a housing and a drive member located within the housing. The cutting assembly includes a fixed base, a blade movably connected to the fixed base, and a rotating shaft driven by the blade. The fixed base is rotatably connected to the housing. One of the drive assembly and the cutting assembly is provided with multiple slots axially surrounding the rotating shaft. The other of the drive assembly and the cutting assembly is provided with a locking member movable along the axial direction of the rotating shaft, and an operating part that moves the locking member. The operating part has a locked state and an unlocked state. When the operating part is in the locked state, the locking member engages with any one of the multiple slots, fixing the fixed base to the housing. When the operating part is in the unlocked state, the locking member disengages from the slot, and the fixed base can rotate relative to the housing. The power tool provided by this application can improve the operator's comfort.

Description

Technical Field

[0001] This application relates to the field of tool technology, and in particular to an electric tool. Background Technology

[0002] With the continuous enrichment of tool types, the practicality of power tools is also constantly improving, making processing operations more convenient for workers. In particular, the use of handheld tools enhances ease of operation and increases work efficiency. However, in existing technology, the actuators of power tools typically operate in a fixed manner, making angle and orientation adjustments impossible. This results in power tools not adapting well to different processing postures, requiring operators to make overall adjustments.

[0003] The overall adjustment of power tools requires operators to change their comfortable grip posture, affecting their user experience. For example, pipe cutters, a common power tool, can be awkward to use when cutting pipes in different positions. This makes it difficult for operators to cut in a comfortable posture. Therefore, how to design the structure of power tools to improve operator comfort is an important issue. Summary of the Invention

[0004] The purpose of this application is to provide an electric tool that can improve the operating comfort of the operator.

[0005] To address the aforementioned technical problems, embodiments of this application provide an electric tool. The electric tool includes a drive assembly and a cutting assembly. The drive assembly includes a housing and a drive member disposed within the housing. The cutting assembly includes a fixed base, a blade movably connected to the fixed base, and a rotating shaft driveably connected to the blade. The fixed base is rotatably connected to the housing, and the rotating shaft is driveably connected to the output end of the drive member. One of the drive assembly and the cutting assembly is provided with multiple slots axially surrounding the rotating shaft. The other of the drive assembly and the cutting assembly is provided with a locking member movable along the axial direction of the rotating shaft, and an operating part that moves the locking member. The operating part has a locked state and an unlocked state. When the operating part is locked, the locking member engages with any one of the multiple slots, fixing the fixed base to the housing. When the operating part is unlocked, the locking member disengages from the slot, allowing the fixed base to rotate relative to the housing.

[0006] The power tool provided in this application has a fixed seat in the actuating part where the blade is located, and the fixed seat is rotatably connected to the housing of the power tool. Furthermore, a locking structure is provided at the mating position between the fixed seat and the housing to restrict the rotational position of the fixed seat. During normal operation of the power tool, the operating part can drive the locking member into the slot, fixing the fixed seat to the housing and keeping the blade in a non-rotating position for cutting. Before processing, the operating part can drive the locking member out of the slot, allowing the angle and orientation of the blade to be adjusted by rotating the fixed seat, enabling the operator to complete the workpiece cutting in a more comfortable grip position. This improves the operator's comfort.

[0007] In some embodiments, the drive assembly further includes a fixing member disposed within the housing, the fixing member having a mounting hole extending axially along the shaft, a engaging member being movably disposed within the mounting hole, and an operating part passing through the housing and entering the mounting hole to connect with the engaging member. Thus, by providing a mounting hole in the fixing member, the installation of the engaging member and the operating part can be facilitated.

[0008] In some embodiments, an elastic element is provided along the movement path of the engaging component. The free end of the elastic element abuts against the engaging component. When the engaging component exits the slot, it squeezes the elastic element, causing the elastic element to undergo elastic deformation. In this way, the engaging component can be automatically reset by the elastic element.

[0009] In some embodiments, the movement direction of the operating part is perpendicular to the movement direction of the engaging member. The engaging member has a first inclined surface that is axially inclined relative to the rotating shaft, and the operating part has a second inclined surface that is axially inclined relative to the rotating shaft. The second inclined surface abuts against the first inclined surface. In this way, the connection between the operating part and the engaging member can be simplified by using inclined surface contact.

[0010] In some embodiments, the engaging component is provided with a limiting surface, which is adjacent to the first inclined surface and is arranged perpendicular to the axial direction of the rotating shaft. When the operating part is in the unlocked state, the operating part abuts against the limiting surface. In this way, the movement position of the operating part can be limited by the setting of the limiting surface, making it easier for the operator to confirm whether the operating part has reached the limit position.

[0011] In some embodiments, the operating part includes a connected pressing part and an actuating part. The housing is provided with a through hole extending radially along the axis of rotation. The actuating part passes through the through hole and abuts against the engaging member. The pressing part is located on the outside of the housing. In this way, by forming a pressing part, it is convenient for the operator to perform pressing control.

[0012] In some embodiments, the operating part further includes a protrusion extending axially from the surface of the operating part along the rotation axis. The protrusion is located on the side of the operating part closer to the slot, and a clearance area is provided on the side of the through hole away from the slot for the protrusion to pass through. In this way, the operating part can be prevented from detaching from the housing by the provision of the protrusion.

[0013] In some embodiments, the head of the engaging member that engages with the slot is tapered. This tapered shape at the head of the engaging member facilitates its engagement with the slot.

[0014] In some embodiments, the mounting base is provided with multiple ribs axially surrounding the rotating shaft, with a groove formed between adjacent ribs. This allows for the easy formation of grooves on the mounting base by providing the ribs.

[0015] In some embodiments, a chamfer is provided at the edge of any two adjacent ribs that are close to each other. In this way, by providing a chamfer at the edge of the rib, it is easier to achieve the snap-fit ​​of the engaging component. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the power tools provided in some embodiments of this application;

[0018] Figure 2 This is a front view structural diagram of a power tool provided in some embodiments of this application;

[0019] Figure 3 This is a cross-sectional structural schematic diagram of a power tool provided in some embodiments of this application;

[0020] Figure 4 This is a cross-sectional view of the power tools provided in some embodiments of this application from another perspective;

[0021] Figure 5 This is a schematic diagram of the mating structure at the location of the operating part in a power tool provided in some embodiments of this application;

[0022] Figure 6 yes Figure 5 Enlarged structural diagram at point A;

[0023] Figure 7 This is a three-dimensional structural diagram of the fixed base and the engaging component in the power tool provided in some embodiments of this application.

[0024] Figure 8 This is a front view structural diagram of the power tool provided in some embodiments of this application when the fixed base and the locking component are engaged;

[0025] Figure 9 This is a cross-sectional structural diagram of the fixed base and the engaging component in a power tool provided in some embodiments of this application.

[0026] Figure 10 This is a schematic diagram of the mating structure between the operating part and the engaging part in a power tool provided in some embodiments of this application;

[0027] Figure 11 This is a schematic diagram of the structure of the operating part of the power tool provided in some embodiments of this application when it is in a locked state;

[0028] Figure 12 This is a schematic diagram of the structure of the operating part of the power tool provided in some embodiments of this application when it is in the unlocked state;

[0029] Figure 13 This is a schematic diagram of the structure of the operating part of the power tool provided in some embodiments of this application during assembly;

[0030] Figure 14 This is a schematic diagram of the structure of the operating part of the power tool provided in some embodiments of this application after assembly. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this application to enable readers to better understand this application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can be implemented. The division of the various embodiments below is for the convenience of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0033] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0034] like Figures 1 to 14 As shown, some embodiments of this application provide a power tool including a drive assembly and a cutting assembly. The drive assembly includes a housing 11 and a drive member disposed within the housing 11. The cutting assembly includes a fixed base 21, a blade 22 movably connected to the fixed base 21, and a rotating shaft 23 throttlely connected to the blade 22. The fixed base 21 is rotatably connected to the housing 11, and the rotating shaft 23 is throttlely connected to the output end of the drive member 12.

[0035] An adjustment mechanism is provided between the drive assembly and the cutting assembly. Operating the adjustment mechanism causes the cutting assembly to rotate relative to the drive assembly. One of the drive assembly and the cutting assembly has multiple slots 31 axially surrounding the rotating shaft 23. The other of the drive assembly and the cutting assembly has a locking member 32 movable along the rotating shaft 23, and an operating part 33 that moves the locking member 32. The multiple slots 31, the locking member 32, and the operating part 33 together constitute the adjustment mechanism. The operating part 33 has a locked state and an unlocked state. When the operating part 33 is locked, the locking member 32 engages with any one of the multiple slots 31, fixing the fixing seat 21 to the housing 11. When the operating part 33 is unlocked, the locking member 32 disengages from the slot 31, allowing the fixing seat 21 to rotate relative to the housing 11.

[0036] The drive assembly, comprising the drive components, is the main body of the power tool. The housing 11 encapsulates the power tool and forms the mounting base for other components. Simultaneously, the housing 11 provides protection for these components. The drive components, transmission components, and actuating components can be assembled at different locations within the housing 11. The housing 11 can also be designed with a grip for operator handling. The drive components provide power for the operation of the power tool, while the transmission components transmit the motion of the drive components to the actuating components in a suitable manner. For example, in an electric pipe cutter, a motor generates driving force, and a planetary gear transmission mechanism 14 decelerates the motor's motion and increases the output torque. This, in turn, drives the blade 22 located at the power output end to oscillate or move linearly via a corresponding motion conversion mechanism, achieving the cutting of pipes 41 such as PVC (Polyvinyl Chloride) or PPR (polypropylene random copolymer).

[0037] The drive unit 12 can be a motor, which can be an internal rotor motor or an external rotor motor. A battery module can be equipped in the power tool to provide power input to the drive unit 12. During operation, the drive unit 12 converts electrical energy into mechanical energy, forming the drive source. The drive unit 12 can be positioned away from the actuators of the power tool to facilitate the assembly of the battery module.

[0038] The cutting assembly is located at the power output end of the power tool, near the edge of the housing 11. The cutting assembly can rotate relative to the housing 11 as an independent unit to adjust the cutting direction of the blade 22 to accommodate the workpiece's orientation. The mounting base 21 provides a mounting foundation for the moving parts of the cutting assembly, including but not limited to the blade 22 and the rotating shaft 23. The blade 22, as the component that ultimately performs the action, is movably connected to the mounting base 21 in a suitable manner. For example, in the electric pipe shears shown in the figure, the blade 22 is movably connected to the mounting base 21 in a linear motion. The drive unit 12 extends the blade 22 to cut the pipe, and retracts the blade 22 after cutting. Simultaneously, the rotating shaft 23 is connected to the output end of the drive unit 12, receiving the power output from the drive unit 12, moving synchronously with the output end of the drive unit 12, and transmitting the motion to the blade 22. Figure 3 and Figure 4As shown, the fixed base 21 can be equipped with a rotatable lead screw 24 and a nut 25 that can move axially along the rotating shaft 23. The nut 25 is threadedly engaged with the lead screw 24 and connected to the blade 22. In other words, the cutting assembly uses a lead screw 24 and nut 25 mechanism to achieve transmission, converting rotation into linear movement. Thus, the rotation of the rotating shaft 23 is transmitted through the lead screw 24 and nut 25 mechanism and transmitted to the blade 22 in the form of linear motion, causing the blade 22 to move axially along the rotating shaft 23 to cut the workpiece.

[0039] The fixing seat 21 of the cutting assembly is rotatably connected to the housing 11 of the drive assembly, and the fixing seat 21 can rotate relative to the housing 11 along the axial direction of the rotating shaft 23. Furthermore, a locking structure is provided between the fixed part of the drive assembly and the fixing seat 21 of the cutting assembly, which locks the position of the fixing seat 21. The locking structure is implemented by the engagement of a slot 31 and a engaging member 32. When it is necessary to lock the position of the fixing seat 21, the engaging member 32 can be moved axially along the rotating shaft 23 by the operating part 33 until the engaging member 32 enters the slot 31. This restricts the free rotation of the fixing seat 21, thus restricting the free rotation of the cutting assembly. When it is necessary to adjust the cutting angle of the blade 22, the engaging member 32 can be disengaged from the slot 31 by the operating part 33, allowing the operator to adjust the angle and orientation of the blade 22 by rotating the fixing seat 21 to accommodate the workpiece's placement. This allows the operator to complete the workpiece cutting process in a more comfortable grip position. In practice, the slot 31 can be disposed on the fixed part of the drive assembly, and the engaging member 32 and the operating part 33 can be disposed on the fixed base 21 of the cutting assembly. Alternatively, the slot 31 can be disposed on the fixed base 21 of the cutting assembly, and the engaging member 32 and the operating part 33 can be disposed on the fixed part of the drive assembly.

[0040] The power tool provided in some embodiments of this application has a fixed base 21 in the actuating part where the blade 22 is located. The fixed base 21 is rotatably connected to the housing 11 of the power tool. Furthermore, a locking structure is provided at the mating position of the cutting component and the driving component to restrict the rotational position of the fixed base 21. During normal operation of the power tool, the operating part 33 can drive the engaging member 32 into the slot 31, fixing the fixed base 21 to the housing 11 and keeping the blade 22 in a non-rotating position for cutting. Before processing, the operating part 33 can drive the engaging member 32 out of the slot 31, allowing the angle and orientation of the blade 22 to be adjusted by rotating the fixed base 21, enabling the operator to complete the workpiece cutting in a more comfortable grip position. This improves the operator's comfort.

[0041] In some embodiments, the drive assembly may further include a fixing member 13 disposed within the housing 11, the fixing member 13 being provided with a mounting hole 131 extending axially along the shaft 23, a locking member 32 being movably disposed within the mounting hole 131, and an operating part 33 passing through the housing 11 into the mounting hole 131 and connecting with the locking member 32.

[0042] The mounting hole 131 is used for mounting the engaging component 32. The mounting hole 131 is a blind hole, with the bottom of the engaging component 32 inserted near the bottom end of the mounting hole 131. The engaging component 32 can be moved through the mounting hole 131, and its movement position can be restricted. The operating part 33 passes through the housing 11 and connects to the engaging component 32. The fixing member 13 has a through hole 132 communicating with the mounting hole 131, and the head of the operating part 33 can pass through the through hole 132 to connect to the engaging component 32. An operator can move the engaging component 32 by controlling the operating part 33 from outside the housing 11, thereby changing the engaging component 32 between a locked and unlocked position. The operating part 33 can be fixedly connected to the engaging component 32 or movably connected to the engaging component 32, capable of engaging and disengaging the engaging component 32 into and out of the slot 31. The moving direction of the operating part 33 can be consistent with or parallel to the moving direction of the engaging part 32, or the two can move in different directions.

[0043] The locking component 32 can be configured as a columnar structure, which facilitates the installation of the locking component 32. At the same time, a key structure, such as a flat key 321, can be installed on the locking component 32. By placing the flat key 321 between the locking component 32 and the groove of the hole wall of the mounting hole 131, it is ensured that the locking component 32 cannot rotate.

[0044] In addition, an elastic element 34 can be provided on the moving path of the locking member 32. The free end of the elastic element 34 abuts against the locking member 32. When the locking member 32 exits the slot 31, it squeezes the elastic element 34, causing the elastic element 34 to undergo elastic deformation.

[0045] The elastic element 34 can be a spring, a sheet, or other component with elastic deformation characteristics. The elastic deformation characteristics of the elastic element 34 can achieve automatic reset of the locking element 32, keeping it in a locked state without external control. This keeps the cutting assembly of the power tool in a state where it cannot rotate freely.

[0046] When the locking member 32 is moved and controlled by the operating unit 33, the locking member 32 can exert a force on the free end of the elastic member 34, causing the elastic member 34 to compress. After the locking member 32 is completely disengaged from the slot 31, the entire cutting assembly can be rotated relative to the housing 11 by rotating the fixed base 21 to adjust the angle and orientation of the blade 22. After adjusting to the appropriate angle and orientation, the operator removes control of the operating unit 33, and the locking member 32 loses the force transmitted by the operating unit 33. At this time, the elastic member 34 recovers under its elastic deformation characteristics, and the locking member 32 can be driven by the elastic member 34 to re-engage in the slot 31 and enter the locked state.

[0047] In some embodiments, such as Figure 10 As shown, the moving direction of the operating part 33 can be perpendicular to the moving direction of the engaging member 32. The engaging member 32 has a first inclined surface 301 that is axially inclined relative to the rotating shaft 23, and the operating part 33 has a second inclined surface 302 that is axially inclined relative to the rotating shaft 23. The second inclined surface 302 abuts against the first inclined surface 301.

[0048] The operating part 33 moves perpendicular to the moving direction of the engaging part 32, meaning the operating part 33 can move radially along the rotating shaft 23. This allows the operator to easily adjust the angle of the blade 22 by pressing and moving the operating part 33, facilitating control of its state. The engaging part 32 and the operating part 33 make contact via a beveled contact, which generates a force between them that forms a certain angle with the axis of the rotating shaft 23. Figure 11 As shown, when the operating part 33 is in the locked state, the engaging member 32 engages with the slot 31. When the operator presses the operating part 33, a force is applied to the operating part 33. This force, when transmitted to the engaging member 32, can be further decomposed into an axial force parallel to the rotating shaft 23 and an axial force perpendicular to the rotating shaft 23. The axial component force parallel to the rotating shaft 23 then drives the engaging member 32 to move within the mounting hole 131, causing the mounting hole 131 to exit the slot 31 and reach the desired position. Figure 12 The unlock position shown is used to unlock the mounting base 21 from the housing 11.

[0049] Additionally, the locking member 32 may be provided with a limiting surface 303, which is adjacent to the first inclined surface 301 and is arranged perpendicular to the axial direction of the rotating shaft 23. When the operating part 33 is in the unlocked state, the operating part 33 abuts against the limiting surface 303.

[0050] The limiting surface 303 is adjacent to the first inclined surface 301. During the movement of the engaging member 32, the limiting surface 303 will enter the movement path of the operating part 33 until it comes into contact with the operating part 33. At this time, the second inclined surface 302 of the operating part 33 remains in contact with the first inclined surface 301 of the engaging member 32, and one side of the operating part 33 remains in contact with the limiting surface 303 of the engaging member 32, preventing the operating part 33 from moving further. The engaging member 32 is also in the state of being disengaged from the slot 31. The operator can rotate the fixed base 21 to adjust the angle and orientation of the cutting assembly. The limiting surface 303 restricts the movement position of the operating part 33, allowing the operator to determine whether the engaging member 32 has disengaged from the slot 31. At the same time, it also ensures that the operating part 33 is always in a state of engagement with the engaging member 32.

[0051] like Figure 6 and Figure 10 As shown, the operating part 33 may include a pressing part 331 and an actuating part 332 connected together. The housing 11 is provided with a through hole 101 extending radially along the rotating shaft 23. The actuating part 332 passes through the through hole 101 and abuts against the engaging part. The pressing part 331 is located on the outside of the housing 11.

[0052] The pressing part 331 is the part where the operator presses, and the actuating part 332 is the part where the operating part 33 transmits the force to the engaging member 32. The through hole 101 provided in the housing 11 extends radially along the rotating shaft 23, allowing the actuating part 332 to pass through and restricting the movement of the actuating part 332 radially along the rotating shaft 23. The pressing part 331 has a cross-sectional area that is relatively larger than that of the actuating part 332. The pressing part 331 is restricted to the outside of the housing 11, providing convenience for the operator to press.

[0053] In some embodiments, the operating part 33 may further include a protrusion 333 extending axially from the surface of the actuating part 332 along the rotating shaft 23. The protrusion 333 is located on the side of the actuating part 332 near the slot 31, and a clearance area 102 is provided on the side of the hole wall of the through hole 101 away from the slot 31 for the protrusion 333 to pass through.

[0054] A protrusion 333 is provided on the side wall of the operating part 332, located near the slot 31. The protrusion 333 can abut against the housing 11, thereby preventing the operating part 33 from detaching from the housing 11. Simultaneously, the through hole 101 of the housing 11 has a clearance area 102 on the side away from the slot 31, which facilitates the installation of the operating part 33. The operating part 33 adopts a one-piece structure, such as... Figure 13 As shown, when the operating part 33 is assembled onto the housing 11, the protrusion 333 on one side of the actuating part 332 can be aligned with the clearance area 102, allowing the actuating part 332 to pass through the through hole 101 of the housing 11. After the protrusion 333 is fully inserted into the housing 11, as shown... Figure 14 As shown, by rotating the operating part 33, the protrusion 333 is rotated to the side closer to the slot 31, thus enabling the installation of the operating part 33. Figure 6 As shown, the edges of the through holes 132 on the fixing member 13 have different radii. Compared to the edge of the through hole 132 on one side of the moving direction of the engaging member 32, the edge of the through hole 132 on the other side of the moving direction of the engaging member 32 has a larger radius, which can accommodate the rotation of the operating part 33 during installation. The edges with different radii can each form a 180-degree arc angle.

[0055] In practice, the various parts of the operating unit 33 can also be connected together in a separate manner.

[0056] In some embodiments, the head of the engaging member 32 that engages with the slot 31 may be tapered.

[0057] By setting the head of the locking member 32 to a conical shape, the possibility of interference when the locking member 32 is engaged in the slot 31 can be reduced, so that the locking member 32 can be engaged in the slot 31 more smoothly, thereby achieving the locking of the cutting component.

[0058] like Figures 7 to 9 As shown, the fixed base 21 may be provided with multiple ribs 35 axially surrounding the rotating shaft 23, and a groove 31 is formed between two adjacent ribs 35.

[0059] Ribs 35 are axially arranged around the rotating shaft 23, forming multiple slots 31 on the periphery of the rotating shaft 23. Each slot 31 can form a base for a locking member 32 to lock the fixing seat 21 to the housing 11. The locking member 32 can abut against one side of the rib 35, forming line contact with the rib 35. By increasing the number of slots 31, fine adjustment of the cutting component can be achieved. That is, by increasing the number of slots 31, the arc angle formed between two adjacent slots 31 can be minimized, thereby allowing adjustment of the cutting component within a smaller angle range.

[0060] In addition, a chamfer can be provided at the edge of any two adjacent reinforcing bars 35 that are close to each other.

[0061] By setting a chamfer at the edge of the rib 35, it is easier for the engaging member 32 to engage with the slot 31. When the engaging member 32 reaches the opening of the slot 31, the edge of the rib 35 cannot provide stable support for the engaging member 32, so that no matter where the operator releases the operating part 33, the engaging member 32 can be engaged with the nearest slot 31.

[0062] Those skilled in the art will understand that the above embodiments are specific implementations of this application, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of this application.

Claims

1. A power tool, comprising a housing, a drive assembly housed in the housing, and a cutting assembly connected to the drive assembly, the drive assembly including a drive member for driving the cutting assembly, the cutting assembly including a fixed base housed in the housing and connected to the drive assembly, and a blade driven by the drive assembly, the blade moving relative to the fixed base as the drive member rotates; characterized in that: The power tool includes an adjustment mechanism connected between the drive assembly and the cutting assembly, which is operated to rotate the cutting assembly relative to the drive assembly.

2. The power tool according to claim 1, characterized in that: One of the driving component and the cutting component is provided with a plurality of circumferentially distributed slots, and the other of the driving component and the cutting component is provided with a locking member that mates with the slots. The locking member is engaged with the slots to fix the cutting component to the front end of the driving component.

3. The power tool according to claim 2, characterized in that: The adjustment mechanism includes an operating part that drives the locking member to move. The adjustment mechanism has a locked state and an unlocked state. When the operating part is in the locked state, the locking member is engaged in the slot so that the cutting component is fixed to the driving component. When the operating part is in the unlocked state, the locking member disengages from the slot, and the cutting component rotates freely relative to the driving component.

4. The power tool according to claim 3, characterized in that: The drive assembly further includes a fixing member disposed within the housing. The fixing member has a mounting hole extending axially along the rotation axis of the drive assembly. The engaging member is movably disposed within the mounting hole. The operating part passes through the housing, extends to the mounting hole, and connects with the engaging member.

5. The power tool according to claim 4, characterized in that: An elastic element is provided on the moving path of the engaging component. The two ends of the elastic element are respectively connected to the engaging component and the mounting hole. When the engaging component moves away from the slot, it squeezes the elastic element, causing the elastic element to undergo elastic deformation.

6. The power tool according to claim 4, characterized in that: The moving direction of the operating part intersects the moving direction of the engaging member. The engaging member has a first inclined surface that is axially inclined relative to the rotating shaft. The operating part has a second inclined surface that is axially inclined relative to the rotating shaft. The second inclined surface abuts against the first inclined surface.

7. The power tool according to claim 6, characterized in that: The locking component is provided with a limiting surface, which is located at the end of the first inclined surface. When the operating part is in the unlocked state, the operating part abuts against the limiting surface.

8. The power tool according to claim 3, characterized in that: The operating part includes a pressing part and an actuating part connected together. The housing is provided with a through hole extending radially. The actuating part passes through the through hole and abuts against the engaging member. The pressing part is located on the outside of the housing.

9. The power tool according to claim 8, characterized in that: The operating part further includes a protrusion extending axially from the surface of the actuating part. The protrusion is located on the side of the actuating part closer to the slot, and the side of the hole wall away from the slot is provided with a clearance area for the protrusion to pass through.

10. The power tool according to claim 2, characterized in that: The head of the locking component that engages with the slot is cone-shaped.

11. The power tool according to claim 1, characterized in that: The fixing base is provided with a plurality of ribs evenly distributed along the circumference, and the slot is formed between two adjacent ribs; a chamfer is provided at the edge of any two adjacent ribs that are close to each other.

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