Power tool with rotating handle

Abstract

The utility model discloses a power tool with rotating handle, including casing, handle and locking assembly, the connecting portion is protruding on the casing, is equipped with the connecting channel on the handle, is equipped with the annular track groove on the outer periphery of connecting portion, is equipped with the annular bead on the inner periphery of connecting channel, and the bead is cooperated with track groove, and the relative rotation of handle and casing is locked by locking assembly, and is equipped with at least two sets of elastic support assembly between the outer periphery of connecting portion and the inner periphery of connecting channel, and the elastic support assembly is supported between the outer periphery of connecting portion and the inner periphery of connecting channel, and is equipped with at least two recesses on the inner periphery of connecting channel, and the elastic support assembly includes the head and first spring, and the first spring is supported between the head and connecting portion, and the head is on the recess, and is equipped with the first spherical surface portion in the recess, and is equipped with the second spherical surface portion with the first spherical surface portion face and face abutment on the head, and the clearance of handle and casing connection is eliminated through the support of elastic support assembly.

Description

Technical Field

[0001] This utility model relates to a handheld power tool, and more particularly to a power tool with a rotating handle. Background Technology

[0002] With social development and technological advancements, the demand for handheld power tools such as angle grinders, hedge trimmers, and grooving machines is increasing, and their functions are becoming more diverse. The handles of traditional handheld power tools are typically fixed to the machine housing. While the optimal grip is considered from a specific angle, in different operating environments, operators often need to rotate their wrists to adjust the angle of the tool head. This makes the machine less adaptable to various environments, and prolonged wrist twisting can easily lead to hand fatigue.

[0003] To address the aforementioned issues, handheld power tools have emerged on the market that allow the angle of the tool head to be changed by rotating the handle relative to the housing. For example, the rotatable angle grinder disclosed in patent CN213164703U includes a housing, a handle, a drive assembly, a gearbox, and a grinding wheel. The ends of both the housing and the handle are circular. The outer end face of the housing has a track groove for rotating the handle, and the inner end face of the handle has a locking tooth that mates with the track groove. When the handle is rotated, the locking tooth slides along the track groove. The handle has an integrally formed groove-shaped support, and an elastic element is assembled inside the groove of the support. A locking button is connected to the top of the elastic element. Under normal conditions, there is a clearance between the locking button and the support in the height direction. At least two slots are distributed at intervals on the circumference of the inner end face of the housing. The locking button has a locking tongue with a free end that can be inserted into the slot. Pressing the locking button can disengage the locking tongue from the slot and release the locking connection between the handle and the housing.

[0004] Existing power tools have a cylindrical connecting part on the housing for rotatable connection, and a channel on the handle for inserting the connecting part. The outer circumference of the connecting part has a track groove, and the inner circumference of the channel has a locking tooth that mates with the track groove. The locking tooth engages with the track groove, allowing the handle to be rotatably connected to the housing. However, after assembly, there is a certain gap between the track groove and the locking tooth in both the radial and axial directions of the connecting part. This gap may cause the handle and housing to wobble during use, affecting the tool's performance and posing a safety hazard. Utility Model Content

[0005] In view of the problem that the handle and the housing are prone to shaking due to the gap, this utility model provides an electric tool with a rotating handle.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an electric tool with a rotating handle, including a housing, a handle, and a locking assembly. A cylindrical connecting part protrudes from the housing, and a circular connecting channel is provided on the handle for insertion of the connecting part. An annular track groove is provided on the outer circumferential surface of the connecting part, and an annular rib is provided on the inner circumferential surface of the connecting channel. The rib cooperates with the track groove to rotatably connect the handle to the housing. The locking assembly locks the relative rotation between the handle and the housing. At least two sets of elastic support assemblies are provided between the outer circumferential surface of the connecting part and the inner circumferential surface of the connecting channel. The elastic support assemblies are distributed along the circumference of the connecting part and are mutually... The elastic support component is set at an angle and is supported between the outer peripheral surface of the connecting part and the inner peripheral surface of the connecting channel. The elastic support component can elastically expand and contract along the radial direction of the connecting part. The inner peripheral surface of the connecting channel is provided with at least two recesses that cooperate with the elastic support component. The elastic support component includes a top and a first spring. The first spring is supported between the top and the connecting part. The top rests on the recess. The recess is provided with a first spherical part. The top is provided with a second spherical part that abuts against the surface of the first spherical part. When the locking component is unlocked and the handle rotates relative to the housing, the top moves from one recess to another for support.

[0007] A further preferred embodiment of this invention is as follows: the first spherical surface is divided into a concave spherical surface, and the second spherical surface is divided into a convex spherical surface, wherein the concave spherical surface and the convex spherical surface have the same diameter.

[0008] A further preferred embodiment of this invention is that the top end is a sphere.

[0009] A further preferred technical solution of this utility model is: the top head is a ball head pin, and a second spherical part is provided on the head of the ball head pin away from the first spring.

[0010] A further preferred embodiment of this utility model is as follows: the handle includes a left half shell and a right half shell, which are joined together and fixedly connected by screws, forming a connecting channel between the left half shell and the right half shell. Two parallel track grooves are provided on the outer circumferential surface of the connecting part, and two parallel ribs are provided on the inner circumferential surface of the connecting channel. The two ribs slide in cooperation with the two track grooves respectively. The elastic support component is installed between the two track grooves, and the recess is provided between the two ribs.

[0011] A further preferred embodiment of this utility model is as follows: the elastic support component is provided in two sets, the two sets of elastic support components are set at 180°, and four recesses are evenly provided on the inner circumferential surface of the connecting channel, with each recess set at 90° to the other.

[0012] A further preferred embodiment of this utility model is as follows: the outer peripheral surface of the connecting part is provided with a mounting groove for installing an elastic support component, a sleeve is inserted into the mounting groove, the first spring and the top head are placed inside the sleeve, and a portion of the top head protrudes from the opening of the sleeve.

[0013] A further preferred embodiment of this invention is that the opening edge of the recess is chamfered.

[0014] A further preferred embodiment of this utility model is as follows: the locking assembly includes a locking button and a second spring on the handle. The second spring is used to drive the locking button to move and reset. A circular groove is provided on the end face of the connecting part. At least two slots are evenly provided on the inner circumference of the circular groove. The locking button is provided with a locking tongue that extends into the circular groove. When the locking tongue is embedded in the slot, the top head rests in the corresponding recess for support. Pressing the locking button can disengage the locking tongue from the slot to release the locking connection between the handle and the housing.

[0015] A further preferred embodiment of this utility model is as follows: it further includes a motor and an output shaft, the motor is installed inside the housing, the output shaft is connected to the motor drive, and the centerline of the output shaft is perpendicular to the centerline of the connecting part.

[0016] Compared with the prior art, the advantage of this utility model is that at least two sets of elastic support components are provided between the outer peripheral surface of the connecting part and the inner peripheral surface of the connecting channel. The elastic support components are distributed circumferentially along the connecting part and are angled to each other. The elastic support components are supported between the outer peripheral surface of the connecting part and the inner peripheral surface of the connecting channel, and the elastic support components can elastically expand and contract along the radial direction of the connecting part. At least two recesses that cooperate with the elastic support components are provided on the inner peripheral surface of the connecting channel. The elastic support components include a top and a first spring. The first spring is supported between the top and the connecting part. The top rests on the recess. A first spherical portion is provided in the recess. A second spherical portion is provided on the top, which abuts against the surface of the first spherical portion. The connecting part is supported between the outer peripheral surface of the connecting part and the inner peripheral surface of the connecting channel by at least two angled elastic support components, and the elastic support components can elastically expand and contract along the radial direction of the connecting part. The top head in the elastic support assembly abuts against the first spherical part in the recess via the second spherical part, eliminating the radial and axial gaps between the track groove and the rib at the connection. This ensures the reliability of the connection between the handle and the housing. Furthermore, the elastic support between the inner and outer circumferential surfaces of the elastic support assembly prevents the track groove and the rib from being pressed tightly in the axial and radial directions at the connection, thus avoiding the track groove and the rib from being pressed tightly and affecting the rotation of the handle relative to the housing. In addition, the abutting between the second spherical part and the first spherical part in the recess allows the spherical part to push the top head out of the recess when the handle rotates relative to the housing, making the top head move out more smoothly and not hindering the rotation of the handle and the housing. After the handle is rotated and adjusted relative to the housing, the top head falls into the recess, providing a positioning between the handle and the housing, which facilitates the locking assembly to lock the rotation of the handle and the housing. Attached Figure Description

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram showing the handle rotated to the 0° position relative to the housing.

[0019] Figure 2 for Figure 1 A schematic diagram of the transverse section;

[0020] Figure 3 for Figure 2 A magnified view of part A;

[0021] Figure 4 for Figure 1 A vertical cross-sectional diagram;

[0022] Figure 5 for Figure 4 A magnified view of section B;

[0023] Figure 6 for Figure 1 A cross-sectional diagram showing the elastic support component supporting the handle and the housing;

[0024] Figure 7 for Figure 1 A cross-sectional diagram showing the rotation of the locking mechanism's locking handle and housing;

[0025] Figure 8 for Figure 7 A magnified view of a portion at point C;

[0026] Figure 9 This is a cross-sectional diagram showing the latch disengaging from the slot.

[0027] Figure 10 This is a schematic diagram showing the handle rotated to a 90° position relative to the housing.

[0028] Figure 11 for Figure 10 A cross-sectional diagram showing the elastic support component supporting the handle and the housing;

[0029] Figure 12 for Figure 10 A cross-sectional diagram showing the rotation of the locking mechanism's locking handle and housing;

[0030] Figure 13This is a schematic diagram showing the handle rotated relative to the housing to the -90° position.

[0031] Figure 14 for Figure 13 A cross-sectional diagram showing the elastic support component supporting the handle and the housing;

[0032] Figure 15 for Figure 13 A cross-sectional diagram showing the rotation of the locking mechanism's locking handle and housing;

[0033] Figure 16 This is a diagram showing the separation of the handle from the casing;

[0034] Figure 17 This is a structural diagram of the casing section;

[0035] Figure 18 This is a structural diagram of the handle.

[0036] In the diagram: 1. Handle; 2. Switch; 3. Locking button; 4. Housing; 5. Head housing; 6. Output shaft; 7. Motor; 8. Connecting channel; 9. Connecting part; 10. Track groove; 11. Rib; 12. Mounting groove; 13. Sleeve; 14. First spring; 15. Chamfer; 16. Top head; 17. Recess; 18. Circular groove; 19. Button opening; 20. Limiting flange; 21. Positioning post; 22. Second spring; 23. Support base; 24. Positioning groove; 25. Locking tongue; 26. Slot; 27. Limiting baffle. Detailed Implementation

[0037] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0038] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0039] Figures 1-18 As shown, the power tool with a rotating handle includes a housing 3, a handle 1, and a locking assembly. The housing 3 has a cylindrical connecting part 9 protruding from it. The handle 1 has a circular connecting channel 8 for the connecting part 9 to be inserted into. The outer circumferential surface of the connecting part 9 has an annular track groove 10, and the inner circumferential surface of the connecting channel 8 has an annular rib 11. The rib 11 cooperates with the track groove 10 to rotatably connect the handle 1 to the housing 3. The locking assembly locks the relative rotation between the handle 1 and the housing 3.

[0040] The power tool also includes a motor 7 and an output shaft 6. The motor 7 is installed inside the housing 3, and the output shaft 6 is connected to the motor 7 for transmission. The axis of the output shaft 6 is perpendicular to the axis of the connecting part 9. A switch 2 is provided on the handle 1 for control.

[0041] Specifically, a head shell 5 is installed at the front of the housing 3, a motor 7 is installed inside the housing 3, and an output shaft 6 is installed inside the head shell 5. The motor shaft of the motor 7 extends into the head shell 5 and is connected to the output shaft 6 for transmission. One end of the output shaft 6 extends out of the head shell 5 to connect to the tool head. The motor 7 drives the output shaft 6 to rotate so that the working head can work.

[0042] Figure 4 , Figure 5 , Figures 7-9 As shown, the locking assembly includes a locking button 3 and a second spring 22 mounted on the handle 1. The second spring 22 drives the locking button 3 to move and reset. A circular groove 18 is provided on the end face of the connecting part 9. At least two slots 26 are evenly distributed on the inner circumference of the circular groove 18. The locking button 3 has a locking tongue 25 extending into the circular groove 18. The locking tongue 25 is embedded in the slots 26 to lock the relative rotation of the handle 1 and the housing 3. When the locking button 3 is pressed, it moves the locking tongue 25 and compresses the second spring 22, causing the locking tongue 25 to disengage from the slots 26, thus releasing the locking connection between the handle 1 and the housing 3. This allows for relative rotation adjustment between the handle 1 and the housing 3. When the handle 1 rotates relative to the housing 3 to the desired angle position, the pressed locking button 3 is released. At this time, the second spring 22 drives the locking button 3 to move and reset, causing the locking tongue 25 to engage in the corresponding slots 26 to relock the relative rotation of the handle 1 and the housing 3. The locking button 3 moves radially along the connecting channel 8 when pressed.

[0043] The locking structure of the aforementioned locking component is the same as that in patent CN213164703U.

[0044] The handle 1 is provided with a support base 23, and the support base 23 is provided with a positioning groove 24. The locking button 3 is provided with a positioning post 21 opposite to the positioning groove 24. One end of the second spring 22 is sleeved on the positioning post 21, and the other end of the second spring 22 is inserted into the positioning groove 24.

[0045] The handle 1 is provided with a button opening 19 for the locking button 3 to extend and be pressed. The locking button 3 is housed in the button opening 19 and moves within it. The lower end of the locking button 3 is provided with a limiting flange 20 that is engaged with the lower side of the button opening 19 to prevent the locking button 3 from detaching from the button opening 19 from the handle 1.

[0046] Figure 2 , Figure 3 , Figures 16-18As shown, at least two sets of elastic support components are provided between the outer peripheral surface of the connecting part 9 and the inner peripheral surface of the connecting channel 8. The elastic support components are evenly distributed along the circumference of the connecting part 9 and are set at an angle to each other. The elastic support components are supported between the outer peripheral surface of the connecting part 9 and the inner peripheral surface of the connecting channel 8, and the elastic support components can elastically extend and retract along the radial direction of the connecting part 9. At least two recesses 17 that cooperate with the elastic support components are provided on the inner peripheral surface of the connecting channel 8. The elastic support components include a top head 16 and a first spring 14. The first spring 14 is supported between the top head 16 and the connecting part 9. The top head 16 rests on the recesses 17. A first spherical portion is provided in the recesses 17. A second spherical portion is provided on the top head 16 that abuts against the surface of the first spherical portion. When the locking component is unlocked and the handle 1 rotates relative to the housing 3, the top head 16 can be switched from one recess 17 to another recess 17 for support.

[0047] This patent utilizes at least two angled elastic support components to support the connection portion 9 between its outer peripheral surface and the inner peripheral surface of the connection channel 8. The top 16 of each elastic support component abuts against the first spherical portion within the recess 17 via a second spherical portion. This spherical-to-spherical contact restricts the axial and radial movement of the handle 1 and the housing 3 within the connection portion 9, eliminating the radial and axial gaps between the track groove 10 and the rib 11 in the connection portion 9. This ensures the reliability of the connection between the handle 1 and the housing 3. Furthermore, the elastic support between the inner and outer peripheral surfaces of the elastic support components prevents the track groove 10 from contacting the rib 11 with the rib 8. Rib 11 is pressed axially and radially on the connecting part 9 to prevent the track groove 10 from being pressed tightly against the rib 11 and affecting the rotation of the handle 1 relative to the housing 3. In addition, the top head 16 abuts against the first spherical part in the recess 17 through the second spherical part, so that when the handle 1 rotates relative to the housing 3, the spherical part can push the top head 16 out of the recess 17, making the top head 16 move out more smoothly and not hindering the rotation of the handle 1 and the housing 3. After the handle 1 is rotated and adjusted relative to the housing 3, the top head 16 falls into the recess 17, which can provide a positioning between the handle 1 and the housing 3, making it easy for the locking component to lock the rotation of the handle 1 and the housing 3.

[0048] When the locking tongue 25 is embedded in the slot 26 to lock the relative rotation of the handle 1 and the housing 3, the top head 16 rests in the corresponding recess 17 for support.

[0049] Preferably, there are two sets of elastic support components, which are arranged at 180°. Four recesses 17 are evenly distributed on the inner circumferential surface of the connecting channel 8, with each recess 17 arranged at 90° to the others. Three slots 26 are provided, also arranged at 90° to each other. The two symmetrically arranged elastic support components ensure more balanced force distribution between the handle 1 and the sides of the housing 3, thereby improving the stability of the connection.

[0050] Figures 6-8 , Figures 10-15As shown, when handle 1 is rotated to the 0° position relative to housing 3, and is held upright, output shaft 6 faces downwards, and two top heads 16 rest on the two left and right recesses 17. Locking tongue 25 is engaged in the middle slot 26, locking the rotation of housing 3 and handle 1. After the locking assembly is unlocked, handle 1 is rotated 90° clockwise from the 0° position relative to housing 3, so that handle 1 is rotated to the 90° position relative to housing 3. When handle 1 is held upright, output shaft 6 faces right, and two top heads 16 rest on the left and right recesses 17. On the upper and lower recesses 17, release the pressed locking button 3 to allow the locking tongue 25 to engage in the slot 26 on one side for locking; after the locking assembly is unlocked, rotate the handle 1 90° counterclockwise relative to the housing 3 from the 0° position to the -90° position. Hold the handle 1 upright, with the output shaft 6 facing left and the two top heads 16 resting on the upper and lower recesses 17. Release the pressed locking button 3 to allow the locking tongue 25 to engage in the slot 26 on the other side for locking.

[0051] Figure 9 As shown, two of the three slots 26 located on the sides are provided with limiting baffles 27. When the handle 1 and the housing 3 rotate, the limiting baffles 27 can limit the maximum angle of rotation of the locking tongue 25 to both sides, thereby controlling the maximum range of rotation of the handle 1 to the left or right, so that the handle 1 can only rotate to 90° when rotating clockwise from 0° position, and can only rotate to -90° when rotating counterclockwise.

[0052] The first spherical part is divided into a concave spherical part, and the second spherical part is divided into a convex spherical part. The concave and convex spherical parts have the same diameter, thus achieving surface-to-surface contact between the first and second spherical parts.

[0053] Preferably, the top 16 can be a sphere.

[0054] Alternatively, in another embodiment, the top 16 is a ball-head pin, with a second spherical portion on the head of the ball-head pin on the side away from the first spring 14.

[0055] Preferably, the opening edge of the recess 17 is provided with a chamfer 15. The chamfer 15 makes it easier for the top head 16 to enter or exit the recess 17, and it is not easy for the top head 16 to wear out during long-term entry or exit.

[0056] The handle 1 includes a left half shell and a right half shell. The left half shell and the right half shell are assembled and fixedly connected by screws. A connecting channel 8 is formed between the left half shell and the right half shell. Two parallel track grooves 10 are provided on the outer peripheral surface of the connecting part 9. Two parallel ribs 11 are provided on the inner peripheral surface of the connecting channel 8. The two ribs 11 are slidably engaged with the two track grooves 10 respectively. An elastic support component is installed between the two track grooves 10. A recess 17 is provided between the two ribs 11.

[0057] Figure 2 , Figure 3 As shown, during installation, a set of first springs 14 and top heads 16 are installed between the two track grooves 10. Then, the left half-shell is pressed onto the connecting part 9, so that the top head 16 is between the two protruding ribs 11. Then, another set of first springs 14 and top heads 16 are installed between the two track grooves 10, and the right half-shell is also pressed onto the connecting part 9, so that the other set of top heads 16 is also between the two protruding ribs 11. The two protruding ribs 11 can limit the top head 16. The left half-shell and the right half-shell are connected by screws to complete the installation. The above structure allows the two protruding ribs 11 to limit the top head 16 during installation, making assembly simpler. When the handle 1 rotates relative to the housing 3, the top head 16 moves between the two protruding ribs 11. The two protruding ribs 11 can serve as the track for the top head 16 to move, making the top head 16 more stably positioned between the connecting channel 8 and the connecting part 9.

[0058] The outer peripheral surface of the connecting part 9 is provided with a mounting groove 12 for installing an elastic support component. A sleeve 13 is inserted into the mounting groove 12. The first spring 14 and the top head 16 are placed in the sleeve 13, and a portion of the top head 16 protrudes from the opening of the sleeve 13 to press against the recess 17.

[0059] The sleeve 13 provides better support for the first spring 14 and the top head 16, and also prevents the top head 16 from contacting the mounting groove 12 during radial extension and retraction, thus avoiding wear on the mounting groove 12. Wear on the mounting groove 12 is difficult to repair, while wear on the sleeve 13 can be directly replaced. The sleeve 13 can be made of metal.

[0060] The first spring 14 and the top head 16 can also be directly installed in the mounting slot 12.

[0061] The electric tool with a rotating handle provided by this utility model has been described above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An electric tool with a rotating handle, comprising a housing, a handle, and a locking assembly, wherein the housing has a protruding cylindrical connecting portion, the handle has a circular connecting channel for insertion of the connecting portion, the outer circumferential surface of the connecting portion has an annular track groove, and the inner circumferential surface of the connecting channel has an annular rib, the rib engaging with the track groove to rotatably connect the handle to the housing, and the locking assembly locks the relative rotation of the handle and the housing, characterized in that... At least two sets of elastic support components are provided between the outer peripheral surface of the connecting part and the inner peripheral surface of the connecting channel. The elastic support components are distributed along the circumference of the connecting part and are set at an angle to each other. The elastic support components are supported between the outer peripheral surface of the connecting part and the inner peripheral surface of the connecting channel, and the elastic support components can elastically expand and contract along the radial direction of the connecting part. At least two recesses that cooperate with the elastic support components are provided on the inner peripheral surface of the connecting channel. The elastic support components include a top and a first spring. The first spring is supported between the top and the connecting part. The top rests on the recess. The recess has a first spherical part. The top has a second spherical part that abuts against the surface of the first spherical part. When the locking component is unlocked and the handle rotates relative to the housing, the top moves from one recess to another for support.

2. The power tool with a rotating handle according to claim 1, characterized in that, The first spherical surface is divided into a concave spherical surface, and the second spherical surface is divided into a convex spherical surface, wherein the concave spherical surface and the convex spherical surface have the same diameter.

3. The power tool with a rotating handle according to claim 1, characterized in that, The top is a sphere.

4. The power tool with a rotating handle according to claim 1, characterized in that, The top end is a ball-head pin, and a second spherical portion is provided on the side of the ball-head pin away from the first spring.

5. The power tool with a rotary handle according to claim 1, characterized in that, The handle includes a left half shell and a right half shell, which are joined together and fixedly connected by screws. A connecting channel is formed between the left half shell and the right half shell. Two parallel track grooves are provided on the outer circumferential surface of the connecting part, and two parallel ribs are provided on the inner circumferential surface of the connecting channel. The two ribs slide in cooperation with the two track grooves respectively. The elastic support component is installed between the two track grooves, and the recess is provided between the two ribs.

6. The power tool with a rotary handle according to claim 1, characterized in that, The elastic support assembly is provided in two sets, which are arranged at 180°. The inner circumferential surface of the connecting channel is evenly provided with four recesses, which are arranged at 90° to each other.

7. The power tool with a rotary handle according to claim 5, characterized in that, The outer circumferential surface of the connecting part is provided with a mounting groove for installing an elastic support component. A sleeve is inserted into the mounting groove, the first spring and the top head are placed inside the sleeve, and a portion of the top head protrudes from the opening of the sleeve.

8. The power tool with a rotary handle according to claim 1, characterized in that, The opening edge of the recess is chamfered.

9. The power tool with a rotating handle according to claim 1, characterized in that, The locking assembly includes a locking button and a second spring on the handle. The second spring is used to drive the locking button to move and reset. A circular groove is provided on the end face of the connecting part. At least two slots are evenly provided on the inner circumference of the circular groove. The locking button is provided with a locking tongue that extends into the circular groove. When the locking tongue is embedded in the slot, the top head rests in the corresponding recess for support. Pressing the locking button can disengage the locking tongue from the slot to release the locking connection between the handle and the housing.

10. The power tool with a rotary handle according to claim 1, characterized in that, It also includes a motor and an output shaft. The motor is installed inside the housing, and the output shaft is connected to the motor drive. The centerline of the output shaft is perpendicular to the centerline of the connecting part.

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