A tool head, power tool and method of use

Abstract

This invention relates to the field of power tool technology, and more particularly to a tool head, a power tool, and a method of use. The tool head includes a protective cover, an adjusting plate, an adjusting assembly, and a blade setting assembly. At least a portion of the cutting element is rotatably disposed within the protective cover. The adjusting plate is rotatably disposed on the protective cover about a first axis and is configured to abut against the upper surface of a curb. The adjusting assembly is configured to adjust the relative angle between the mounting plate and the adjusting plate. The blade setting assembly is disposed on the tool head. This invention can effectively cut weeds while avoiding motor stalling, ensuring blade life, and improving the user experience.

Description

Technical Field

[0001] This invention relates to the field of power tool technology, and more particularly to a tool head, a power tool, and a method of using it. Background Technology

[0002] A lawn trimmer is typically used when mowing lawns in gardens and along concrete curbs. The trimmer's function is to abrade the soil, simultaneously cutting away the grass. It can remove unruly grass growing along the edges of the lawn and weeds growing between paving stones.

[0003] There are generally two operating methods when using a lawn mower:

[0004] 1. Align the blade before starting: First, align the blade with the area to be cut, then start the machine. If the blade rotates only slightly, it will hit the soil. At this point, the motor output torque is low, and the blade's ability to break through the soil is limited, causing the machine to stall or even burn out the motor.

[0005] 2. Start the machine first, then align the blade: Start the machine first to let the blade spin, then align it with the area to be cut. This method will result in uneven cuts at first, and the blade is more likely to hit the ground and wear down, generate sparks, and have a large reaction force, which will shorten the life of the blade and result in a poor user experience.

[0006] Therefore, a tool head, a power tool, and a method of use are needed to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a tool head, a power tool, and a method of use that can effectively cut weeds while avoiding motor stalling, ensuring the lifespan of the blades, and improving the user experience.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] A tool head, comprising:

[0010] A protective cover, wherein at least a portion of the cutting components are rotatably disposed within the protective cover;

[0011] The tool head also includes:

[0012] An adjusting plate, which is rotatably mounted on the protective cover about a first axis, is configured to abut against the upper surface of the curb;

[0013] An adjustment component, configured to adjust the relative angle between the mounting plate and the adjustment plate;

[0014] Tool setting assembly, the tool setting assembly being disposed on the tool head.

[0015] Furthermore, the adjustment assembly includes a stop that defines the relative angle between the protective cover and the adjustment plate.

[0016] Furthermore, the stop is a buckle, and the protective cover has multiple slots on the side facing the adjustment plate. The buckle cooperates with the slots to limit the relative angle between the adjustment plate and the mounting plate.

[0017] Furthermore, a limiting groove is provided on the adjusting plate, and a limiting member passes through the limiting groove and connects to the protective cover.

[0018] Furthermore, the blade-setting assembly includes a blade-setting plate configured to conform to the side of the curb.

[0019] Furthermore, the blade plate and the adjusting plate are an integrated structure.

[0020] Furthermore, the tool setting assembly includes a laser tool setter, which is capable of emitting laser light for tool setting.

[0021] Furthermore, the tool head also includes a mounting plate rotatably mounted on the protective cover, and a roller (5) rotatably mounted on the mounting plate, the roller being configured to roll on the road surface.

[0022] Furthermore, the mounting plate is provided with a height adjustment groove, and the roller's shaft is disposed in the height adjustment groove, the position of the shaft in the height adjustment groove being adjustable.

[0023] Furthermore, a torsion spring is provided between the protective cover and the adjusting plate, with one end of the torsion spring fixed to the protective cover and the other end of the torsion spring fixed to the adjusting plate.

[0024] A power tool includes a power head, a connecting rod, and a tool head as described above. The tool head is connected to a cutting component via a transmission connection. One end of the connecting rod is connected to the power head, and the other end of the connecting rod is connected to a protective cover.

[0025] Furthermore, the power tool is a trimming machine.

[0026] A method of using a power tool, for operating the power tool as described above, includes the following steps:

[0027] S1. Adjust the adjustment components according to the expected cutting depth to adjust the relative angle between the adjustment plate and the protective cover;

[0028] S2. Place the contact surface of the adjusting plate on the upper surface of the curb;

[0029] S3. Using the tool setting assembly, the cutting part is set with reference to the side of the curb.

[0030] S4. Turn on the power head to make the cutting piece start to rotate;

[0031] S5. Lift the connecting rod, and rotate the protective cover relative to the adjusting plate by a set angle, so that the cutting piece is pressed down and cuts.

[0032] The beneficial effects of this invention are:

[0033] The tool head provided by this invention has a simple structure, is easy to operate, has a long service life, and provides good cutting results.

[0034] The power tool provided by this invention can effectively cut weeds while avoiding motor stalling, ensuring the service life of the blades, and improving the user experience.

[0035] The present invention provides a method for operating the power tool described above. First, the cutting depth and blade are adjusted, then the power head is started, and then the cutting is performed by pressing down. This method can effectively cut weeds while avoiding motor stalling, ensuring the service life of the blades, and improving the user experience. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a tool head according to an embodiment of the present invention;

[0037] Figure 2 yes Figure 1 An exploded view of the tool head in the image;

[0038] Figure 3 This is a partial cross-sectional view of another embodiment of the present invention, which includes an adjustment component;

[0039] Figure 4 yes Figure 1 A cross-sectional view of the tool head in the image;

[0040] Figure 5 This is a schematic diagram of a power tool according to an embodiment of the present invention;

[0041] Figure 6 yes Figure 5 A flowchart showing how to use power tools.

[0042] In the picture:

[0043] 1. Protective cover; 11. Cutting part; 12. Slot; 13. Guide slot; 2. Mounting plate; 21. Limiting part; 211. Fixing part; 22. Height adjustment slot; 3. Adjusting plate; 31. Stop surface; 32. Limiting slot; 33. Contact surface; 4. Adjusting assembly; 41. Buckle; 411. Stop part; 42. Screw; 43. Nut; 5. Roller; 6. Torsion spring; 7. Tool setting assembly; 71. Tool setting plate; 100. Tool head; 101. First axis; 200. Connecting rod; 201. First handle; 202. Second handle; 300. Power head; 400. Power tool. Detailed Implementation

[0044] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings, not all of them.

[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0046] A trimmer is typically used when mowing lawns in gardens and along roadsides. The trimmer's function is to abrade the soil, simultaneously cutting away the grass. It can remove unruly grass growing along lawn edges and weeds growing between paving stones. During the trimming process, to effectively cut weeds while preventing motor stalling, ensuring blade life, and improving the user experience, [further details are needed]. Figures 1-4 As shown, the tool head 100 includes a protective cover 1, a mounting plate 2, an adjustment plate 3, an adjustment assembly 4, and a tool setting assembly 7.

[0047] At least a portion of the cutting element 11 is rotatably disposed within the protective cover 1. The cutting element 11 is a blade. The blade includes at least one cutting edge for cutting soil and weeds. An adjusting plate 3 is rotatably disposed on the protective cover 1 about a first axis 101. The adjusting plate 3 is configured to abut against the upper surface of the curb. The curb refers to the edge portion of a garden, sidewalk, median strip, or shoulder. In this embodiment, the adjusting plate 3 includes a contact surface 33, which is configured to contact the upper surface of the curb. The contact surface 33 is an arc surface. The adjusting assembly 4 can adjust the relative angle between the protective cover 1 and the adjusting plate 3. It should be noted that the relative angle between the protective cover 1 and the adjusting plate 3 is the minimum angle that can be achieved between the protective cover 1 and the adjusting plate 3 as preset by the user. A blade setting assembly 7 is disposed on the tool head 100. The blade setting assembly 7 is configured to prompt the user whether the cutting element 11 is vertically aligned with the curb.

[0048] When using the tool head 100, the user first adjusts the adjustment component 4 to adjust the relative angle between the anti-slip cover and the adjustment plate 3 according to the expected cutting depth. Then, the user places the adjustment plate 3 against the upper surface of the curb. As the protective cover 1 rotates relative to the curb, the cutting element 11 begins to press down. By setting the blade setting component 7, the cutting position of the cutting element 11 can be determined, thus ensuring effective cutting of weeds. Next, the user controls the rotation of the cutting element 11, and after the rotation of the cutting element 11 stabilizes, the user presses down to cut, ensuring that the cutting element 11 has sufficient power, avoiding motor stalling, ensuring the lifespan of the blade, and improving the user experience.

[0049] In some embodiments, the adjusting assembly 4 includes a stop. The stop defines the relative angle between the protective cover 1 and the adjusting plate 32. The adjusting plate 3 includes a stop surface 31. The stop includes a stop portion 411. The stop portion 411 is configured to abut against the stop surface 31 to prevent the adjusting plate 3 from rotating relative to the protective cover 1. In some embodiments, the stop is a snap fastener 41, and the protective cover 1 has a slot 12 on the side facing the adjusting plate 3. The snap fastener 41 cooperates with the slot 12 to define the relative angle between the adjusting plate 3 and the protective cover 1. There can be multiple slots 12. The snap fastener 41 is rotatably mounted on the adjusting plate 3 about a first axis 101. Specifically, multiple slots 12 correspond to multiple relative angles between the adjusting plate 3 and the protective cover 1, i.e., multiple angle settings. The user rotates the snap fastener 41 to insert the snap fastener 41 into the slot 12, so that the snap fastener 41 abuts against the adjusting plate 3, thereby defining the relative angle between the adjusting plate 3 and the protective cover 1. The relative angle between the adjusting plate 3 and the protective cover 1 is limited, which limits the pressing depth of the cutting element 11 and thus the cutting depth. At this point, the desired cutting depth adjustment is complete. When the adjusting plate 3 rotates relative to the protective cover 1 until the stop part 411 abuts against the stop surface 31, a mechanical hard limit is formed. At this point, the cutting depth of the cutting element 11 is the set cutting depth. In other embodiments, a pin and multiple slot structure can also be used, with slots formed on the protective cover 1. The angle can be adjusted by adjusting the pin to engage with different slots.

[0050] like Figure 3As shown, in some embodiments, the adjusting component 4 includes a screw 42, which is rotatably mounted on the protective cover 1, and a nut 43 as a stop. A guide groove 13 is provided on the protective cover 1, and the nut 43 is mounted on the screw 42, located within the guide groove 13. By rotating the screw 42, the nut 43 moves within the guide groove 13. The screw 42 has threads. The nut 43 is fitted onto the screw 42 and engages with it via the threads. Specifically, different positions of the nut 43 within the guide groove 13 correspond to different relative angles between the adjusting plate 3 and the protective cover 1. When the user rotates the screw 42, the nut 43 moves along the threads within the guide groove 13, allowing it to abut against the adjusting plate 3, thereby limiting the relative angle between the adjusting plate 3 and the protective cover 1. The limitation of the relative angle between the adjusting plate 3 and the protective cover 1 limits the pressing depth of the cutting element 11, i.e., the cutting depth. At this point, the adjustment of the desired cutting depth is complete. When the adjusting plate 3 rotates relative to the protective cover 1 until the stop part 411 abuts against the stop surface 31, a mechanical hard limit is formed. At this time, the cutting depth of the cutting part 11 is the set cutting depth. Using a screw 42 and nut 43 structure, the included angle between the protective cover 1 and the adjusting plate 3 can be infinitely adjusted, thereby achieving fine adjustment of the cutting depth as needed and improving the quality of weed trimming. In other embodiments, the adjusting component 4 can be an Archimedean spiral structure or an eccentric structure, as long as it can achieve relative angle adjustment between the protective cover 1 and the adjusting plate 3; no further restrictions are imposed here.

[0051] In some embodiments, a limiting groove 32 is formed on the adjusting plate 3, and a limiting member 21 passes through the limiting groove 32 and connects to the protective cover 1. The limiting groove 32 is basically arc-shaped. The limiting member 21 is configured to move relative to the adjusting plate 3 along the limiting groove 32, and the limiting member 21 and the protective cover 1 are fixedly connected. The limiting member 21 includes a fixing part 211, the size of which is larger than the size of the limiting groove 32. By setting the limiting member 21, the included angle range between the adjusting plate 3 and the protective cover 1 can be further limited. The central angle corresponding to the limiting groove 32 is the adjustable range of the relative angle between the adjusting plate 3 and the protective cover 1. Through the above setting, overshoot can be avoided during the adjustment process, ensuring that the relative angle between the adjusting plate 3 and the protective cover 1 is adjusted within the set angle range. The size of the fixing part 211 is larger than the size of the limiting groove 32, making the rotation of the adjusting plate 3 relative to the protective cover 1 stable and reliable.

[0052] In some embodiments, the blade-setting assembly 7 includes a blade-setting plate 71. The blade-setting plate 71 is disposed on one side of the adjusting plate 3 and is substantially vertically downward. The blade-setting plate 71 can conform to the side of the curb. When the user uses the tool head 100, the blade-setting plate 71 is aligned with the side of the curb to ensure that the cutting path matches the direction of the curb before the cutting element 11 begins cutting, avoiding an initially uneven cutting path. During the cutting process, because the blade-setting plate 71 is in contact with the side of the curb, the user can also judge whether the blade-setting plate 71 is aligned with the side of the curb, thereby adjusting the cutting path of the tool head 100 in a timely manner to ensure that the cut lawn edge is neat and aesthetically pleasing. By setting the blade-setting plate 71, the cutting position of the cutting element 11 can be quickly determined when cutting weeds, thereby ensuring that the trimmed weeds remain neat and guaranteeing the trimming effect.

[0053] In some embodiments, the blade-setting plate 71 and the adjusting plate 3 are an integrated structure. Specifically, the blade-setting plate 71 and the adjusting plate 3 can be manufactured using sheet metal processing. The blade-setting plate 71 and the adjusting plate 3 are mounted together on the protective cover 1 using quick-change screws. By adopting an integrated design for the blade-setting plate 71 and the adjusting plate 3, manufacturing is facilitated, and the strength of the connection between the blade-setting plate 71 and the adjusting plate 3 is ensured. Moreover, the relative position between the blade-setting plate 71 and the adjusting plate 3 does not change, ensuring the accuracy of blade setting. During use, since the adjusting plate 3 abuts against the upper surface of the curb and the blade-setting plate 71 abuts against the side of the curb, it is prone to wear after a period of use. The integrated structure of the blade-setting plate 71 and the adjusting plate 3 allows them to be removed together for easy replacement, making the operation simple and quick. In other embodiments, the adjusting plate 3 and the blade-setting plate 71 are detachably connected. By using quick-change screws to install the tool setting plate 71 onto the adjusting plate 3, the tool setting needs can be met. On the other hand, after the adjusting plate 3 is worn, the quick-change screws can be removed, thereby removing the tool setting plate 71, which can then be installed onto another adjusting plate 3.

[0054] In some embodiments, the tool setting assembly 7 includes a laser tool setter capable of emitting a laser for tool setting. Specifically, in this embodiment, the laser tool setter can emit a single laser beam or a fan-shaped area of ​​laser light, using the side of the curb as a reference surface for tool setting. In other embodiments, two laser tool setters can be used, one emitting a single laser beam that remains fixed at the curb, and the other emitting a single laser beam that moves with the cutting component 11. By using a laser tool setter, the accuracy of tool setting can be guaranteed, while avoiding wear compared to the tool setting plate 71.

[0055] In some embodiments, the tool head 100 further includes a mounting plate 2, which is disposed on the protective cover 1. Rollers 5 are rotatably mounted on the mounting plate 2 and can roll on the road surface. During trimming operations, the rollers 5 effectively support the tool head 100 using the road surface, reducing the labor intensity of cleaning personnel. Furthermore, the rolling motion facilitates movement of the tool head 100, improving the user experience.

[0056] In some embodiments, the mounting plate 2 is provided with a height adjustment groove 22, and the rotating shaft of the roller 5 is disposed in the height adjustment groove 22, and the position of the rotating shaft in the height adjustment groove 22 can be adjusted. When the cleaning personnel use it, they can adjust the position of the roller 5 on the mounting plate 2 according to their own height, thereby adjusting the height of the trimming machine to meet the needs of cleaning personnel of different heights and improve the operating experience.

[0057] In some embodiments, a torsion spring 6 is provided between the protective cover 1 and the adjusting plate 3. One end of the torsion spring 6 is fixed relative to the protective cover 1, and the other end is fixed relative to the adjusting plate 3. During cutting, the adjusting plate 3 is rotated relative to the protective cover 1 at a certain angle, thereby causing the cutting element 11 to press down and cut the weeds. By providing the torsion spring 6, when the adjusting plate 3 rotates against the elastic force of the torsion spring 6, the torsion spring 6 undergoes elastic deformation. After cutting is completed, the torsion spring 6 drives the adjusting plate 3 to return to its original position under the action of its own restoring elastic force.

[0058] like Figure 5 As shown, this embodiment also provides a power tool, including a power head 300, a connecting rod 200, and a tool head 100 as described above. The tool head 100 is connected to the cutting component 11 via a transmission connection. One end of the connecting rod 200 is connected to the power head 300, and the other end of the connecting rod 200 is connected to the protective cover 1. The power head 300 includes a motor, and a drive shaft is provided in the connecting rod 200. Specifically, the drive shaft is a splined shaft. The motor is connected to the drive shaft, and the drive shaft and the cutting component 11 are cut using a bevel gear transmission.

[0059] In this embodiment, the power tool 400 is a trimmer, capable of effectively cutting weeds. A first handle 201 and a second handle 202 are spaced apart on the connecting rod 200, and are fixed to the connecting rod 200. When using the trimmer, the operator holds the first handle 201 and the second handle 202 with both hands to perform the trimming work.

[0060] To reduce the weight of the trimming machine and facilitate operation and portability, in this embodiment, the gearbox and connecting rod 200 of the power head 300 can be made of carbon fiber. The protective cover 1 and the adjusting plate 3 can be made of plastic, saving costs and reducing weight.

[0061] like Figure 6 As shown, this embodiment also provides a method for using a power tool to operate the power tool 400 described above, including the following steps:

[0062] S1. Adjust the adjustment component 4 according to the expected cutting depth, thereby adjusting the relative angle between the adjustment plate 3 and the protective cover 1;

[0063] S2. Place the contact surface 33 of the adjusting plate 3 on the upper surface of the curb;

[0064] S3. Using the tool setting assembly 7, the cutting part 11 is set with reference to the side of the curb.

[0065] S4. Turn on the power head 300 to make the cutting part 11 start to rotate;

[0066] S5. Lift the connecting rod 200, and rotate the protective cover 1 relative to the mounting plate 2 at a set angle, so that the cutting piece 11 is pressed down and cuts.

[0067] By first adjusting the cutting depth and blade alignment, then starting the power head 300, and then pressing down to cut, weeds can be effectively cut while avoiding motor stalling, ensuring the lifespan of the blades, and improving the user experience.

[0068] A cutting component 11 for cutting weeds is installed inside the protective cover 1. An adjusting plate 3 is installed on the protective cover 1, and an adjusting component 4 can adjust the relative angle between the adjusting plate 3 and the protective cover 1. In use, the user first adjusts the relative angle between the protective cover 1 and the adjusting plate 3 according to the required cutting depth using the adjusting component 4. For example, when the lawn is higher than the curb, the user can decrease the cutting depth, i.e., increase the relative angle between the protective cover 1 and the adjusting plate 3. When the lawn is lower than the curb, the user can increase the cutting depth, i.e., decrease the relative angle between the protective cover 1 and the adjusting plate 3. After adjusting the cutting depth, the user places the contact surface 33 of the adjusting plate 3 on the upper surface of the curb. Due to the torque setting of the torsion spring 6, the force exerted by the power tool 400 on the adjusting plate 3 is less than the torque of the torsion spring 6, and the adjusting plate 3 does not rotate relative to the protective cover 1. In this embodiment, the roller 5 and the contact surface 33 of the adjusting plate 3 simultaneously contact the upper surface of the curb to support the power tool 400. At this point, the angle between the connecting rod 200 and the upper surface of the curb is less than or equal to 32 degrees. The user then uses the tool setting assembly 7 to set the cutting piece 11 against the curb. After tool setting, the user starts the power head 300, and the cutting piece 11 rotates. At this point, the cutting piece 11 does not cut the soil, or the soil it cuts is shallow. This prevents the cutting piece 11 from stopping due to excessive resistance, thus avoiding motor stalling. By setting the tool before starting the power head 300, the user ensures the cutting piece 11 will not collide with the curb, improving its lifespan. Once the cutting piece 11 has stabilized, it has sufficient cutting power. The user then grasps the handle and lifts the connecting rod 200, rotating it around the contact surface 33. The center of gravity of the power head 300 shifts, and the force exerted by the power tool 400 on the adjusting plate 3 gradually increases to exceed the torque of the torsion spring 6. The adjusting plate 3 overcomes the spring torque and rotates relative to the protective cover 1. Simultaneously, the cutting component 11 is pressed down along with the protective cover 1 and begins cutting the soil and grass. When the relative angle between the protective cover 1 and the adjusting plate 3 reaches the user-preset angle, the power tool 400 has reached the user-preset cutting depth. At this point, the adjusting component 4 prevents the adjusting plate 3 from continuing to rotate relative to the protective cover 1. Finally, the user pushes the power tool 400, which cuts the soil and grass along the curb at the preset cutting depth, resulting in good cutting effect and convenient operation.

[0069] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A tool head, comprising: The protective cover (1) has at least a portion of the cut piece (11) rotatably disposed inside the protective cover (1); The tool head (100) is characterized in that it further includes: Adjustment plate (3), the adjustment plate (3) is rotatably mounted on the protective cover (1) about the first axis (101), the adjustment plate (3) is configured to abut against the upper surface of the curb; Adjustment component (4), the adjustment component (4) is configured to adjust the relative angle between the protective cover (1) and the adjustment plate (3) to adjust the cutting depth of the cutting component (11); The tool setting assembly (7) is configured to indicate that the cutting element (11) is aligned with the curb in the vertical direction.

2. The tool head according to claim 1, characterized in that, The adjustment assembly (4) includes a stop that defines the relative angle between the protective cover (1) and the adjustment plate (3).

3. The tool head according to claim 2, characterized in that, The stop is a buckle (41), and the protective cover (1) has a slot (12) on the side facing the adjustment plate (3). The buckle (41) and the slot (12) cooperate to limit the relative angle between the adjustment plate (3) and the protective cover (1).

4. The tool head according to claim 1, characterized in that, The adjustment plate (3) has a limiting groove (32), and the limiting member (21) passes through the limiting groove (32) and is connected to the protective cover (1).

5. The tool head according to claim 1, characterized in that, The blade-setting assembly (7) includes a blade-setting plate (71) configured to conform to the side of the curb.

6. The tool head according to claim 5, characterized in that, The blade plate (71) and the adjusting plate (3) are an integrated structure.

7. The tool head according to claim 1, characterized in that, The tool setting assembly (7) includes a laser tool setter configured to emit a laser for tool setting.

8. The tool head according to any one of claims 1-7, characterized in that, The tool head (100) also includes a mounting plate (2) disposed on the protective cover (1), and a roller (5) is rotatably disposed on the mounting plate (2) and configured to roll on the road surface.

9. The tool head according to claim 8, characterized in that, The mounting plate (2) is provided with a height adjustment groove (22), and the shaft of the roller (5) is set in the height adjustment groove (22). The position of the shaft relative to the height adjustment groove (22) can be adjusted.

10. The tool head according to claim 1, characterized in that, The tool head (100) includes a torsion spring (6), one end of which is fixed relative to the protective cover (1), and the other end of which is fixed relative to the adjusting plate (3).

11. A power tool, characterized in that, It includes a power head (300), a connecting rod (200), and a tool head as described in any one of claims 1-10, wherein the tool head (100) is connected to the cutting element (11) in a driving connection, one end of the connecting rod (200) is connected to the power head (300), and the other end of the connecting rod (200) is connected to the protective cover (1).

12. The power tool according to claim 11, characterized in that, The power tool (400) is a trimming machine.

13. A method of using a power tool for operating the power tool as described in any one of claims 11-12, comprising the following steps: S1. Adjust the adjustment component (4) according to the expected cutting depth, thereby adjusting the relative angle between the adjustment plate (3) and the protective cover (1); S2. Place the contact surface of the adjusting plate (3) on the upper surface of the curb; S3. Using the tool setting assembly (7), the cutting piece (11) is set with reference to the side of the curb. S4. Turn on the power head (300) to make the cutting piece (11) start to rotate; S5. Lift the connecting rod (200), and rotate the protective cover (1) relative to the adjusting plate (3) by a set angle, so that the cutting piece (11) presses down and cuts.

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