Power tool

Abstract

A power tool, comprising: an output shaft (1), which comprises a first through hole (11), a second through hole (12), and a mounting hole (13), the first through hole (11) and the second through hole (12) being arranged in an offset manner in the axial direction of the output shaft (1), and said through holes being respectively located on two sides in the radial direction of the output shaft (1); and a quick mounting assembly (2), which comprises a locking sleeve (21), a first locking member (22), a second locking member (23), and an elastic restoration member (24), the locking sleeve (21) being sleeved on the output shaft (1) and being provided with a guide inclined surface (211) and an abutting rib (212). When a tool head (3) is inserted into the mounting hole (13), the tool head (3) presses the first locking member (22) outward in the radial direction, and the first locking member (22) presses the guide inclined surface (211) outward in the radial direction and pushes the locking sleeve (21) to move in the axial direction, such that the tool head (3) can be inserted into a mounting position. According to the power tool, by improving the structure of the locking sleeve and improving the distribution positions of the first locking member and the second locking member on the output shaft, when the tool head is mounted or removed, the first locking member moving outward in the radial direction applies an axial pushing force to the guide inclined surface so as to push the locking sleeve to move in the axial direction, thus not requiring the locking sleeve to be manually pulled, achieving single-hand rapid mounting and removal, and attaining a simple structure.

Description

power tools Technical Field

[0001] This invention relates to the field of power tool technology, and in particular to a power tool. Background Technology

[0002] Power tools typically accommodate tool heads of different sizes to install and remove screws of varying specifications. Tool head installation is achieved through the interaction of a locking sleeve, a steel ball, and a locking spring. The steel ball is installed within a through-hole in the output shaft of the power tool. The locking sleeve fits around the outer circumference of the output shaft and radially presses against the steel ball. To clamp the tool head, first pull the locking sleeve outwards to release its radial pressure on the steel ball. Then, insert the tool head into the mounting hole of the power tool's output shaft. Once the tool head is fully inserted, release the locking sleeve. The locking sleeve, under the rebound force of the locking spring, resets and re-presses radially inwards against the steel ball, thus achieving radial clamping of the tool head. During tool head clamping, the user needs to operate the locking sleeve with one hand and the tool head with the other, which is inconvenient. Summary of the Invention

[0003] Based on the above-mentioned deficiencies in the prior art, the purpose of this invention is to provide an electric tool that, by improving the structure of the locking sleeve and the distribution of the first and second locking members on the output shaft, when clamping or disassembling the tool head, the radially outward-moving first locking member applies an axial pushing force to the guide ramp, thereby pushing the locking sleeve to move axially, eliminating the need to manually pull the locking sleeve and enabling quick one-handed loading and unloading.

[0004] Therefore, the present invention provides the following technical solution.

[0005] This invention provides a power tool, the power tool comprising:

[0006] An output shaft includes a first through hole, a second through hole, and a mounting hole for mounting a tool head; the first through hole and the second through hole are offset in the axial direction of the output shaft, and are respectively located on both radial sides of the output shaft;

[0007] The quick-release assembly includes a locking sleeve, a first locking member, a second locking member, and a reset elastic member. The locking sleeve is sleeved on the output shaft and is provided with a guide slope and a pressing rib. The first locking member is radially movable and inserted into the first through hole, and the second locking member is radially movable and inserted into the second through hole.

[0008] When the tool head is inserted into the mounting hole, the tool head radially outward presses the first locking member, the first locking member radially outward presses the guide slope and pushes the locking sleeve to move along the axial direction, the pressure rib makes way so that the second locking member can move radially outward, thereby allowing the tool head to be inserted into the mounting position, and then the reset elastic member rebounds to reset the locking sleeve.

[0009] Optionally, the shape of the first through hole is configured to restrict axial movement of the first locking member, and the shape of the second through hole is configured to restrict axial movement of the second locking member.

[0010] Optionally, the cross-section of the first through hole and / or the second through hole is circular, equilateral triangle, square, or regular hexagonal.

[0011] Optionally, the first through hole and the second through hole constitute a quick-release through hole group, and the first locking member and the second locking member constitute a quick-release locking member group; the number of quick-release through hole groups is at least two, and the quick-release through hole groups and the quick-release locking member groups are matched one-to-one.

[0012] Optionally, the guide ramp and / or the pressing rib are annular; and / or,

[0013] The first locking element and / or the second locking element is a steel ball; and / or,

[0014] The pressing rib is provided with a pressing surface, which is an arc surface; when the pressing rib presses against the second locking member, the pressing surface completely conforms to the second locking member; and / or,

[0015] When the tool head is in the mounting position, the wall of the mounting hole axially abuts against the end wall of the insertion end of the tool head.

[0016] Optionally, the guide ramp is radially outward along the insertion direction of the tool head in the radial direction of the output shaft.

[0017] Optionally, the first through hole and the second through hole are offset along the insertion direction of the tool head, and a cavity is formed between the guide bevel and the pressing rib. The cavity is configured to limit the maximum displacement value of the first locking member in radial outward movement.

[0018] Optionally, the quick-release assembly includes a retaining ring and a washer, wherein the retaining ring, the washer, and the reset elastic element are sequentially sleeved on the outer periphery of the output shaft along the insertion direction of the tool head;

[0019] The inner wall of the locking sleeve is provided with a protruding structure. The side of the protruding structure opposite to the reset elastic member forms the guide slope. The two ends of the reset elastic member abut against the protruding structure and the gasket, respectively.

[0020] Optionally, when the tool head is inserted into the installation position and the locking sleeve is reset, the guide bevel and the pressing rib respectively radially inward press the first locking member and the second locking member to lock the tool head.

[0021] Optionally, the power tool includes a tool head having an annular groove; the annular groove includes a first arcuate segment and a second arcuate segment sequentially distributed along the axial direction of the tool head, the first arcuate segment and the second arcuate segment being radially symmetrical about the tool head;

[0022] When the tool head is inserted into the installation position, the first locking member presses against the first arc-shaped section, the second locking member presses against the second arc-shaped section, and the first locking member and the second locking member are radially symmetrical about the tool head.

[0023] The present invention has the following technical effects:

[0024] This invention provides an electric tool that, by offsetting the first and second locking members along the axial direction of the output shaft, and by providing a guide slope and a pressing rib on the inner wall of the locking sleeve, allows the tool head to be clamped or disassembled by the cooperation of the guide slope and the first locking member. The radially outward-moving first locking member applies an axial pushing force to the guide slope, thereby pushing the locking sleeve to move axially. This eliminates the need to manually pull the locking sleeve, allowing for one-handed operation of the tool head. The quick-release assembly has a simple structure and enables quick one-handed loading and unloading. Attached Figure Description

[0025] Figure 1 is a partial structural cross-sectional view of the power tool in its initial state according to the present invention;

[0026] Figure 2 is a partial cross-sectional view of the power tool when the first locking member pushes the locking sleeve to move axially during the clamping process of the tool head of the present invention;

[0027] Figure 3 is a partial structural diagram of the power tool when the tool head of the present invention is clamped;

[0028] Figure 4 is an enlarged view of point A in Figure 1;

[0029] Figure 5 is an enlarged view of point B in Figure 2;

[0030] Figure 6 is an enlarged view of point C in Figure 3;

[0031] Figure 7 is an exploded structural diagram of the power tool of the present invention;

[0032] Figure 8 is a perspective sectional view of the locking sleeve of the present invention.

[0033] Explanation of reference numerals in the attached drawings: 100. Power tool; 1. Output shaft; 11. First through hole; 12. Second through hole; 13. Mounting hole; 2. Quick-release assembly; 21. Locking sleeve; 211. Guide slope; 212. Pressure rib; 2121. Pressure surface; 213. Cavity; 214. Protruding structure; 22. First locking element; 23. Second locking element; 24. Reset elastic element; 25. Snap ring; 26. Washer; 3. Tool head; 31. Annular groove; 311. First arc segment; 312. Second arc segment; 32. Body; 33. Cross cutter head; 34. Flathead cutter head; 4. Housing. Detailed Implementation

[0034] To make the technical solution and beneficial effects of the present invention more apparent and understandable, a detailed description is provided below by listing specific embodiments. Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0035] In the description of this invention, unless otherwise expressly defined, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this invention and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. That is, they should not be construed as limiting this invention.

[0036] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" can explicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two; "several" means at least one; unless otherwise expressly defined.

[0037] In this invention, unless otherwise explicitly defined, the terms "installation," "connection," "linking," "fixing," and "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral molding; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also 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 this invention according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly defined, the terms "above," "on top of," "over," "above," "below," "below," "below," or "below" for "first feature above second feature" can refer to the first and second features being in direct contact, or to the first and second features being in indirect contact through an intermediate medium. Furthermore, "above," "over," and "below" for "first feature above second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature below second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0039] In this invention, the terms "before" and "after" refer to the markings in Figure 1.

[0040] The electric tools of the present invention will now be described in detail with reference to Figures 1 to 8.

[0041] In this embodiment, as shown in Figures 1, 4, 7, and 8, the power tool 100 includes an output shaft 1 and a quick-release assembly 2. The output shaft 1 includes a first through hole 11, a second through hole 12, and a mounting hole 13 for mounting a tool head 3. The first through hole 11 and the second through hole 12 are offset axially from each other on the output shaft 1, and are located on opposite radial sides of the output shaft 1. The quick-release assembly 2 includes a locking sleeve 21, a first locking member 22, a second locking member 23, and a reset elastic member 24. The locking sleeve 21 is fitted onto the output shaft 1 and has a guide slope 211 and a pressing rib 212. The first locking member 22 is radially movable and inserted into the first through hole 11, and the second locking member 23 is radially movable and inserted into the second through hole 12.

[0042] As shown in Figures 1 and 4, when the tool head 3 is not inserted into the mounting hole 13, the power tool 100 is in the initial state. At this time, the locking sleeve 21 is in the initial position, the guide slope 211 radially presses the first locking member 22 inward so that the first locking member 22 is in the initial position, and the pressing rib 212 radially presses the second locking member 23 inward so that the second locking member 23 is in the initial position.

[0043] When clamping the tool head 3, insert the tool head 3 into the mounting hole 13, as shown in Figures 2 and 5. The tool head 3 is inserted until its outer peripheral wall contacts the first locking member 22. The tool head 3 radially presses the first locking member 22 outward. The first locking member 22 moves radially outward and presses the guide slope 211. The radially outward moving first locking member 22 can apply an axial pushing force to the guide slope 211, thereby pushing the locking sleeve 21 to move axially. At this time, the pressing rib 212 disengages from the second locking member 23 due to synchronous axial movement. The second locking member 23 moves radially outward under its own weight or under the pressure of the continued insertion of the tool head 3. The second locking member 23 falls into the cavity on one side of the pressing rib 212. In this way, the guide slope 211 and the pressing rib 212 make way for the radial outward movement of the first locking member 22 and the second locking member 23 due to axial movement, thereby allowing the tool head 3 to be inserted into the mounting position.

[0044] As shown in Figures 3 and 6, when the tool head 3 is inserted into the installation position, the first locking member 22 disengages from the tool head 3, and the reset elastic member 24 rebounds, pushing the first locking member 22 into the annular groove 31 of the tool head 3 and resetting the locking sleeve 21. The initial position of the locking sleeve 21 is also its locked position. In the locked position, the guide slope 211 and the pressure rib 212 respectively radially press the first locking member 22 and the second locking member 23 inward to lock the tool head 3, achieving quick installation. Of course, the tool head 3 can also be locked by only radially pressing the second locking member 23 inward by the pressure rib 212. Furthermore, the elasticity of the reset elastic member 24 is configured to keep the locking sleeve 21 in the locked position, so that the tool head 3 can be stably clamped in the mounting hole 13 during the operation of the power tool 100. It can be applied to, but is not limited to, ordinary electric drills, impact drills, screwdrivers, and electric wrenches.

[0045] When the tool head 3 needs to be removed, an external force of a preset value is applied to pull the tool head 3 outward. Similarly, the first locking member 22 moves radially outward and pushes the locking sleeve 21 to move axially so as to pull out the tool head 3 smoothly and achieve quick removal with one hand.

[0046] By adopting the above technical solution, the first locking member 22 and the second locking member 23 are staggered in the axial direction of the output shaft 1, and a guide slope 211 and a pressing rib 212 are provided on the inner wall of the locking sleeve 21. The guide slope 211 and the first locking member 22 cooperate, and when clamping the tool head 3, the radially outward-moving first locking member 22 applies an axial pushing force to the guide slope 211, causing the locking sleeve 21 to move axially. This eliminates the need to manually pull the locking sleeve 21, allowing for one-handed operation of the tool head 3. Furthermore, when the tool head 3 is inserted into the installation position, the guide slope 211 and the pressing rib 212 respectively radially press the first locking member 22 and the second locking member 23 inward, locking the tool head 3. Similarly, the tool head 3 can be removed by pulling it with one hand. The quick-release assembly 2 has a simple structure and enables quick one-handed installation and removal.

[0047] In one embodiment, as shown in Figures 1 and 7, the first locking member 22 and the second locking member 23 are steel balls, which have a simple and compact structure. Of course, the structure of the first locking member 22 and the second locking member 23 is not limited to steel balls, and can also be ball-head pins.

[0048] In one embodiment, as shown in Figures 4 and 8, the pressing rib 212 is provided with a pressing surface 2121, which is an arc surface. When the pressing rib 212 presses against the second locking member 23, the pressing surface 2121 completely fits the second locking member 23 to improve the locking stability of the locking sleeve 21 on the first locking member 22 and the second locking member 23.

[0049] In one embodiment, the shape of the first through hole 11 is configured to restrict the axial movement of the first locking member 22, and the shape of the second through hole 12 is configured to restrict the axial movement of the second locking member 23. That is, the first through hole 11 and the first locking member 22 are clearance-fitted, and the second through hole 12 and the second locking member 23 are clearance-fitted. When the tool head 3 presses against the first locking member 22 and the second locking member 23, the first locking member 22 and the second locking member 23 can only move radially. Further, the cross-section of the first through hole 11 and / or the second through hole 12 is circular, equilateral triangle, square, or regular hexagonal. Preferably, to simplify the hole processing technology, both the first through hole 11 and the second through hole 12 are circular holes.

[0050] In one embodiment, the first through hole 11 and the second through hole 12 constitute a quick-release through hole group, and the first locking member 22 and the second locking member 23 constitute a quick-release locking member group; the number of quick-release through hole groups is at least two, and the quick-release through hole groups and quick-release locking member groups are matched one-to-one. For example, the number of quick-release through hole groups is two, that is, the number of first through holes 11 and the number of second through holes 12 are both two, and the number of first locking members 22 and the number of second locking members 23 are also two. The first locking members 22 and the second locking members 23 in each group cooperate with each other to increase the locking force on the tool head 3.

[0051] In one embodiment, as shown in FIG8, the guide slope 211 and the pressing rib 212 are annular. On the one hand, when assembling the locking sleeve 21, the operation of aligning the guide slope 211 and the first locking member 22 and aligning the pressing rib 212 and the second locking member 23 is eliminated. On the other hand, the misalignment of the guide slope 211 and the first locking member 22 and the pressing rib 212 and the second locking member 23 due to mis-rotation of the locking sleeve 21 is avoided.

[0052] In one embodiment, the guide ramp 211 is radially outward along the insertion direction of the tool head 3 in the radial direction of the output shaft 1. As shown in Figures 1, 2, 4, and 5, the tool head 3 is inserted into the mounting hole 13 from the front to the rear of the output shaft 1. The guide ramp 211 is radially outward along the front-to-back direction in the radial direction of the output shaft 1. Thus, as shown in Figure 5, when the first locking member 22 presses against the guide ramp 211 due to radial outward movement, it can push the locking sleeve 21 forward. In this embodiment, the locking sleeve 21 is held in its initial position by the reset elastic member 24 and the front end wall of the housing 4. In Figures 1, 2, 4, and 5, arrow a indicates the insertion direction of the tool head 3, and arrow b indicates the movement direction of the locking sleeve 21 during the clamping of the tool head 3.

[0053] Of course, the inclination direction of the guide slope 211 is not limited to this. It can also be that the guide slope 211 is radially outward along the pull-out direction of the tool head 3 in the radial direction of the output shaft 1 (not shown in the figure). That is, the guide slope 211 is radially outward along the direction from back to front in the radial direction of the output shaft 1. In this way, when the first locking member 22 squeezes the guide slope 211 due to radial outward movement, it can push the locking sleeve 21 to move backward. In this solution, a limiting protrusion (not shown in the figure) can be provided on the outer periphery of the front end of the output shaft 1, and the locking sleeve 21 can be held in the initial position by the limiting protrusion and the reset elastic member.

[0054] Further, as shown in Figure 4, the first through hole 11 and the second through hole 12 are offset along the insertion direction of the tool head 3, that is, the first through hole 11 and the second through hole 12 are offset along the front-back direction. As shown in Figures 4 and 8, the guide slope 211 and the pressing rib 212 are offset along the front-back direction, and a cavity 213 is formed between the guide slope 211 and the pressing rib 212. The cavity 213 is constructed to limit the maximum displacement value of the first locking member 22 in radial outward movement. That is, by limiting the shape and size of the cavity 213, the maximum displacement value of the first locking member 22 in radial outward movement can be limited, thereby limiting the maximum axial displacement of the locking sleeve 21.

[0055] Further, as shown in Figures 4 and 7, the quick-release assembly 2 includes a retaining ring 25 and a washer 26. The retaining ring 25, the washer 26, and the reset elastic member 24 are sequentially sleeved on the outer periphery of the output shaft 1 along the insertion direction of the tool head 3. The inner wall of the locking sleeve 21 is provided with a protruding structure 214. The side of the protruding structure 214 opposite to the reset elastic member 24 forms a guide slope 211. The reset elastic member 24 is located between the locking sleeve 21 and the output shaft 1, and its two ends abut against the protruding structure 214 and the washer 26, respectively.

[0056] In one embodiment, as shown in FIG6, when the tool head 3 is in the installation position, the wall of the mounting hole 13 abuts axially against the end wall of the insertion end of the tool head 3. In this way, during the operation of the power tool 100, the tool head 3 will not overcome the locking of the quick-release assembly 2 due to excessive reaction force.

[0057] In one embodiment, as shown in Figures 4 and 6, the power tool 100 includes a tool head 3. The tool head 3 has an annular groove 31, which includes a first arcuate segment 311 and a second arcuate segment 312 sequentially distributed along the axial direction of the tool head 3. The first arcuate segment 311 and the second arcuate segment 312 are radially symmetrical about the tool head 3. When the tool head 3 is inserted into the installation position, a first locking member 22 presses against the first arcuate segment 311 on one radial side of the tool head 3, and a second locking member 23 presses against the second arcuate segment 312 on the other radial side of the tool head 3. The radial symmetry of the first locking member 22 and the second locking member 23 about the tool head 3 facilitates stable locking of the tool head 3.

[0058] Specifically, as shown in Figures 5 to 7, the radial dimension of the body 32 of the tool head 3 is greater than the radial dimension of the annular groove 31. When the tool head 3 is inserted into the mounting hole 13 of the output shaft 1, the outer peripheral wall of the body 32 of the tool head 3 presses against the first locking member 22. The first locking member 22 pushes the locking sleeve 21 to move axially. The tool head 3 continues to be inserted until the tool head 3 reaches the installation position. At this time, the first locking member 22 is opposite to the first arc surface segment 311, and the second locking member 23 is opposite to the second arc surface segment 312. In this way, the reset elastic member 24 can push the locking sleeve 21 to the initial position to press the first locking member 22 and the second locking member 23.

[0059] Furthermore, tool head 3 typically has cutting heads at both ends, which can be the same type but different specifications, or different types of cutting heads. For example, as shown in Figure 7, one end of tool head 3 is a cross cutting head 33, and the other end is a flat cutting head 34. Both ends of tool head 3 are provided with annular grooves 31 to accommodate tool head 3 with cutting heads at both ends.

[0060] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of the present invention that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of the present invention and do not limit the scope of protection of this patent.

Claims

1. A power tool characterized by comprising: The electric tool (100) comprises: an output shaft (1) comprising a first through hole (11), a second through hole (12) and a mounting hole (13) for mounting a tool head (3); the first through hole (11) and the second through hole (12) are arranged in an axial direction of the output shaft (1) and are respectively located on two sides of the output shaft (1) in a radial direction; a quick mounting assembly (2) comprising a locking sleeve (21), a first locking member (22), a second locking member (23) and a reset elastic member (24); the locking sleeve (21) is sleeved on the output shaft (1) and is provided with a guide inclined surface (211) and a pressing rib (212); the first locking member (22) is movably inserted into the first through hole (11) in a radial direction; the second locking member (23) is movably inserted into the second through hole (12) in a radial direction; When the tool head (3) is inserted into the mounting hole (13), the tool head (3) extrudes the first locking member (22) radially outward, the first locking member (22) extrudes the guide inclined surface (211) radially outward to push the locking sleeve (21) to move in the axial direction, the pressing rib (212) is disengaged to enable the second locking member (23) to move radially outward, thereby enabling the tool head (3) to be inserted into a mounting position, and then the reset elastic member (24) rebounds to reset the locking sleeve (21).

2. The power tool of claim 1, wherein, The shape of the first through hole (11) is configured to limit axial movement of the first locking member (22), and the shape of the second through hole (12) is configured to limit axial movement of the second locking member (23).

3. The power tool of claim 2, wherein, The first through hole (11) and / or the second through hole (12) has a circular, equilateral triangular, square or hexagonal cross section.

4. The power tool of claim 1, wherein, The first through hole (11) and the second through hole (12) form a quick mounting through hole group, and the first locking member (22) and the second locking member (23) form a quick mounting locking member group; the number of the quick mounting through hole group is at least two, and the quick mounting through hole group and the quick mounting locking member group are arranged in one-to-one correspondence.

5. The power tool according to any one of claims 1 to 4, characterized in that, The guide inclined surface (211) and / or the pressing rib (212) is annular; and / or, The first locking member (22) and / or the second locking member (23) is a steel ball; and / or, The pressing rib (212) is provided with a pressing surface (2121), and the pressing surface (2121) is an arc surface; when the pressing rib (212) presses the second locking member (23), the pressing surface (2121) completely fits the second locking member (23); and / or, When the tool head (3) is in the mounting position, the hole wall of the mounting hole (13) axially abuts against the end wall of the insertion end of the tool head (3).

6. The power tool of any of claims 1-4, wherein, The guide inclined surface (211) is inclined radially outward in the insertion direction of the tool head (3) in the radial direction of the output shaft (1).

7. The power tool of claim 6, wherein, The first through hole (11) and the second through hole (12) are arranged in a staggered manner along the insertion direction of the tool head (3), a cavity (213) is formed between the guide slope (211) and the pressing rib (212), and the cavity (213) is configured to limit the maximum displacement value of the radial outward movement of the first locking piece (22).

8. The power tool of claim 7, wherein, The quick mounting assembly (2) comprises a snap spring (25) and a gasket (26), and the snap spring (25), the gasket (26) and the reset elastic member (24) are sequentially sleeved on the outer periphery of the output shaft (1) along the insertion direction of the tool head (3). The inner wall of the locking sleeve (21) is provided with a protruding structure (214), the protruding structure (214) forms the guide slope (211) on the side away from the reset elastic member (24), and the two ends of the reset elastic member (24) are respectively abutted against the protruding structure (214) and the gasket (26).

9. The power tool of any of claims 1-4, wherein, When the tool head (3) is inserted into the mounting position and the locking sleeve (21) is reset, the guide slope (211) and the pressing rib (212) respectively radially inwardly extrude the first locking piece (22) and the second locking piece (23) to lock the tool head (3).

10. The power tool of claim 9, wherein, The electric tool (100) comprises a tool head (3) provided with an annular groove (31); the annular groove (31) comprises a first arc segment (311) and a second arc segment (312) sequentially distributed in the axial direction of the tool head (3), and the first arc segment (311) and the second arc segment (312) are radially symmetrical about the tool head (3). When the tool head (3) is inserted into the mounting position, the first locking piece (22) is pressed against the first arc segment (311), the second locking piece (23) is pressed against the second arc segment (312), and the first locking piece (22) and the second locking piece (23) are radially symmetrical about the tool head (3).

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