Tool head, power tool and method of use

Abstract

The application relates to the technical field of electric tools, in particular to a tool head, a power tool and a use method, the tool head comprising: a protective cover, at least part of a cutting part being rotationally arranged in the protective cover; an adjusting plate being rotationally arranged around a first axis, the adjusting plate being configured to abut against an upper surface of a curb, the adjusting plate having an initial state and an adjusting state, in the initial state, an angle between the adjusting plate and the protective cover is larger than that in the adjusting state; an elastic device configured to drive the adjusting plate to transform from the adjusting state to the initial state; and a tool setting assembly arranged on the adjusting plate. The application can effectively cut weeds, avoid motor locked-rotor, ensure the service life of the blade and improve the experience of operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power tools, in particular to a tool head, a power tool and a use method. BACKGROUND

[0002] When mowing the lawn and the cement curb on the roadside, an edger is usually used. The function of the edger is to dig soil while hitting the grass. The long and disorderly grass on the edge of the lawn and the weeds in the brick joints can be cut off.

[0003] When using the lawn mower, there are usually two operation methods:

[0004] 1. First align the blade and then start: first align the blade with the place to be cut, and then start the machine. The blade will hit the soil after rotating a little, at this time the motor output torque is small, the soil breaking capacity of the blade is limited, causing the motor to stall, and even burn out.

[0005] 2. First start and then align the blade: first start the machine to make the blade rotate, and then align the place to be cut. This way will not cut well at the beginning, the blade is easy to hit the ground and wear out, generate sparks and have large reaction force, which will shorten the service life of the blade and reduce the experience.

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

[0007] The purpose of the present application is to provide a tool head, a power tool and a use method, which can effectively cut weeds while avoiding motor stall, ensuring the service life of the blade and improving the experience of operation.

[0008] To achieve this purpose, the present application adopts the following technical solutions:

[0009] A tool head, comprising: a protective cover, at least part of a cutting member is rotationally arranged in the protective cover; the tool head further comprises: an adjusting plate, rotationally arranged around a first axis, the adjusting plate is configured to abut against the upper surface of the curb, the adjusting plate has an initial state and an adjusting state, in the initial state, the angle between the adjusting plate and the protective cover is greater than the angle between the adjusting plate and the protective cover in the adjusting state; an elastic device configured to drive the adjusting plate to switch from the adjusting state to the initial state; a blade aligning assembly arranged on the adjusting plate.

[0010] In some embodiments, one end of the elastic device is fixed relative to the protective cover, and the other end of the elastic device is fixed relative to the adjusting plate.

[0011] In some embodiments, the tool head comprises a dust cover configured to accommodate at least part of the elastic device.

[0012] In some embodiments, the adjusting plate is provided with a limiting slot, and the limiting member is connected with the protective cover through the limiting slot.

[0013] In some embodiments, the aligning assembly comprises an aligning plate configured to be attached to the side surface of the curb.

[0014] In some embodiments, the aligning plate and the adjusting plate are integrated.

[0015] In some embodiments, the aligning assembly comprises a laser aligning device configured to emit laser to align the cutting member.

[0016] A power tool comprises a power head, a connecting rod and a tool head, the tool head is in transmission connection with a cutting member, one end of the connecting rod is connected with the power head, and the other end of the connecting rod is connected with the protective cover.

[0017] In some embodiments, the power tool is an edging machine.

[0018] A method for operating the power tool as described above, comprising the following steps: S1, placing the contact surface of the adjusting plate on the upper surface of the curb; S2, aligning the cutting member by referring to the side surface of the curb using the aligning assembly; S3, starting the power head so that the cutting member starts to rotate; S4, lifting the connecting rod, and rotating the adjusting plate relative to the protective cover so that the cutting member is pressed down to start cutting; S5, pressing down the connecting rod, and driving the adjusting plate to rotate relative to the protective cover by the elastic device so that the cutting member is lifted to stop cutting.

[0019] The application has the following beneficial effects:

[0020] The tool head provided by the application has the advantages of simple structure, convenient operation, long service life and good cutting effect.

[0021] The power tool provided by the application can effectively cut weeds while avoiding motor stall, ensuring the service life of the blade and improving the experience of operation.

[0022] The method for operating the power tool as described above can effectively cut weeds while avoiding motor stall, ensuring the service life of the blade and improving the experience of operation. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic diagram of the tool head of one embodiment of the application;

[0024] Figure 2 is an exploded view of the tool head in Figure 1

[0025] ​Figure 3 is a partial sectional view of the tool head in Figure 1

[0026] Figure 4 is an exploded view of the elastic device and the dust cover of the tool head in Figure 1

[0027] Figure 5 is a schematic view of a power tool according to an embodiment of the present application;

[0028] Figure 6 is a flow chart of the method of using the power tool in Figure 5

[0029] In the drawings:

[0030] 1, protective cover; 11, cutting member; 14, lower edge; 2, mounting plate; 21, limiting member; 211, fixed portion; 22, height adjustment groove; 3, adjustment plate; 31, stop surface; 32, limiting groove; 33, contact surface; 34, extension surface; 5, roller; 6, elastic device; 61, dust cover; 611, accommodating portion; 612, blocking portion; 613, support rib; 614, fixing groove; 615, first fixed end; 616, second fixed end; 617, hole; 7, tool setting assembly; 71, tool setting plate; 72, contour line; 73, discharge portion; 74, tool setting surface; 100, tool head; 101, first axis; 200, connecting rod; 201, first handle; 202, second handle; 300, power head; 400, power tool. DETAILED DESCRIPTION

[0031] The technical solutions of the present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all.

[0032] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] ​​​An edger is often used when trimming a garden or a lawn along a road. The edger is used to cut the soil and the grass at the same time. The long and disorderly grass at the edge of the lawn and the weeds in the gaps between the bricks can be cut off. In order to effectively cut the weeds and avoid motor stall, ensure the service life of the blade and improve the experience of operation, the tool head 100 includes a protective cover 1, a mounting plate 2, an adjusting plate 3, an elastic device 6 and a tool setting assembly 7, as shown in FIG. 1. Figures 1 to 4

[0034] At least part of the cutting member 11 is rotationally arranged in the protective cover 1, and the cutting member 11 is a blade. The blade includes at least one cutting edge for cutting the soil and the weeds. The adjusting plate 3 is rotationally arranged about a first axis 101, and the adjusting plate 3 is configured to abut against the upper surface of the curb. The curb refers to the edge part of the garden, the sidewalk, the separation belt or the shoulder. In this embodiment, the adjusting plate 3 is rotationally arranged on the protective cover 1, and the adjusting plate 3 includes a contact surface 33 configured to contact the upper surface of the curb. The contact surface 33 is an arc surface. The adjusting plate includes an extension surface 34. The protective cover 1 includes a lower edge 14. The angle a between the adjusting plate 3 and the protective cover 1 refers to the angle between the extension surface 34 and the lower edge 14. The tool setting assembly 7 is arranged on the adjusting plate 3. The tool setting assembly 7 is configured to prompt the user whether the cutting member 11 is vertically aligned with the curb.

[0035] When the tool head 100 is used, the user abuts the adjusting plate 3 against the upper surface of the curb. When the protective cover 1 rotates relative to the curb, the cutting member 11 starts to press down. By arranging the tool setting assembly 7, the cutting position of the cutting member 11 can be determined, so that the weeds can be effectively cut. Then, the user controls the cutting member 11 to rotate, and after the cutting member 11 is stably rotated, the cutting member 11 is pressed down for cutting, so that the cutting member 11 has enough power, the motor stall is avoided, the service life of the blade is ensured, and the experience of operation is improved.

[0036] The adjusting plate 3 has an initial state and an adjusting state. In the initial state, the angle a between the adjusting plate 3 and the protective cover 1 is greater than the angle a between the adjusting plate 3 and the protective cover 1 in the adjusting state. When the adjusting plate 3 is in the initial state, the user abuts the adjusting plate 3 against the curb, and the adjusting plate 3 is fixed relative to the protective cover 1, and at this time the cutting member 11 does not cut the soil. When the adjusting plate 3 is in the adjusting state, the user adjusts the angle a between the adjusting plate 3 and the protective cover 1, and the adjusting plate 3 rotates relative to the protective cover 1, and at this time the cutting member 11 cuts the soil. The adjusting plate 3 is configured to be movable to an initial position and an adjusting position. In some embodiments, when the adjusting plate 3 is located at the initial position, the cutting member 11 is a certain distance away from the soil, and the cutting member 11 does not cut the soil. When the adjusting plate 3 moves to the adjusting position, the cutting member 11 is close to the soil to cut the soil.

[0037] ​The elastic device 6 is configured to drive the adjusting plate 3 to switch from the adjusting state to the initial state. In some embodiments, the elastic device 6 is arranged between the protective cover 1 and the adjusting plate 3. One end of the elastic device 6 is fixed relative to the protective cover 1, and the other end of the elastic device 6 is fixed relative to the adjusting plate 3. The elastic device 6 generates a torque when being compressed. The greater the degree of deformation of the elastic device 6, the greater the torque of the elastic device 6, and the more energy stored by the elastic device. In the initial state, the degree of deformation of the elastic device 6 is smaller than that in the adjusting state. In the initial state, the torque of the elastic device 6 is smaller than that in the adjusting state. That is to say, because the adjusting plate 3 is arranged to rotate on the protective cover 1, in the adjusting state, the elastic device 6 exerts a greater torque on the adjusting plate 3 than in the initial state, and the elastic device 6 has a tendency to release energy. In the adjusting state, the adjusting device 6 always has a tendency to switch the adjusting plate 3 from the adjusting state to the initial state. The elastic device 6 drives the adjusting plate 3 to move from the adjusting state to the initial state, so that after the user completes the cutting work, the adjusting plate 3 is automatically reset to the initial state, ensuring that the operation sequence of the tool head 100 does not change, and facilitating the user to use the tool head 100 next time. When the cutting member 11 cuts the soil, the soil exerts a reaction force on the cutting member 11, and the tool head 100 has a tendency to move upward, and the knife assembly 7 and the adjusting plate 3 have a tendency to move away from the soil and the curb. In the adjusting state, the adjusting device 6 always has a tendency to switch the adjusting plate 3 from the adjusting state to the initial state, so that the adjusting device 6 ensures that the knife assembly 7 and the adjusting plate 3 are always in contact with the soil and the curb, improving reliability.

[0038] When cutting, the adjusting plate 3 is rotated relative to the protective cover 1 by an angle a, so that the cutting member 11 presses down to cut the weeds. By arranging the elastic device 6, when the adjusting plate 3 rotates against the elastic force of the elastic device 6, the elastic device 6 is elastically deformed. After cutting is completed, the elastic device 6 drives the adjusting plate 3 to reset under the action of its own elastic recovery. In some embodiments, the elastic device 6 is a torsion spring. As shown in FIG. 2, the adjusting plate 3 is arranged to rotate on the protective cover 1, and the elastic device 6 is arranged between the protective cover 1 and the adjusting plate 3. One end of the elastic device 6 is fixed relative to the protective cover 1, and the other end of the elastic device 6 is fixed relative to the adjusting plate 3. The elastic device 6 generates a torque when being compressed. The greater the degree of deformation of the elastic device 6, the greater the torque of the elastic device 6, and the more energy stored by the elastic device. In the initial state, the degree of deformation of the elastic device 6 is smaller than that in the adjusting state. In the initial state, the torque of the elastic device 6 is smaller than that in the adjusting state. That is to say, because the adjusting plate 3 is arranged to rotate on the protective cover 1, in the adjusting state, the elastic device 6 exerts a greater torque on the adjusting plate 3 than in the initial state, and the elastic device 6 has a tendency to release energy. In the adjusting state, the adjusting device 6 always has a tendency to switch the adjusting plate 3 from the adjusting state to the initial state. The elastic device 6 drives the adjusting plate 3 to move from the adjusting state to the initial state, so that after the user completes the cutting work, the adjusting plate 3 is automatically reset to the initial state, ensuring that the operation sequence of the tool head 100 does not change, and facilitating the user to use the tool head 100 next time. When the cutting member 11 cuts the soil, the soil exerts a reaction force on the cutting member 11, and the tool head 100 has a tendency to move upward, and the knife assembly 7 and the adjusting plate 3 have a tendency to move away from the soil and the curb. In the adjusting state, the adjusting device 6 always has a tendency to switch the adjusting plate 3 from the adjusting state to the initial state, so that the adjusting device 6 ensures that the knife assembly 7 and the adjusting plate 3 are always in contact with the soil and the curb, improving reliability. Figure 4As shown in the drawings, in some embodiments, the tool head 100 comprises a dust cover 61 configured to accommodate at least part of the elastic device 6. The dust cover 61 is substantially C-shaped. The dust cover 61 comprises an accommodating portion 611 and a blocking portion 612. The accommodating portion 611 is formed with a columnar accommodating space configured to accommodate the elastic device 6. The size of the accommodating portion 611 is greater than that of the elastic device 6, so that the elastic device 6 can be deformed in the accommodating portion 611. The accommodating portion 611 comprises a support rib 613 supporting the elastic device 6. The support rib 613 has a thickness in the extension direction of the first axis 101, so that the support rib 613 blocks the soil from entering the elastic device 6 from the extension direction of the first axis 101. In some embodiments, the support rib 613 is plate-shaped. The accommodating portion 611 comprises a fixing groove 614. The elastic device 6 comprises a first fixing end 615 and a second fixing end 616. The fixing groove 614 accommodates the first fixing end 615. The second fixing end 616 is fixedly connected with the protective cover 1. The dust cover 61 is fixedly connected with the adjusting plate 3. When the adjusting plate 3 rotates from the initial position to the adjusting position, the dust cover 61 rotates with the adjusting plate 3, and the dust cover 61 drives the elastic device 6 to rotate. When the adjusting plate 3 has a tendency to rotate from the adjusting position to the initial position, the elastic device 6 drives the dust cover 61 to rotate, thereby driving the adjusting plate 3 to rotate. The blocking portion 612 comprises a plurality of holes 617. The plurality of holes 617 are distributed along the radial direction of the first axis 101, so that the holes 617 reduce the weight of the dust cover 61. The dust cover 61 accommodates the elastic device 6, so that the situation of soil polluting the elastic device 6 is eliminated or at least reduced, and the reliability of the elastic device 6 is improved.

[0039] As shown in the drawings, Figures 2 to 3 In some embodiments, a limiting groove 32 is formed on the adjusting plate 3, and the limiting piece 21 is connected with the protective cover 1 through the limiting groove 32. The limiting groove 32 is substantially arc-shaped. The limiting piece 21 is configured to move along the limiting groove 32 relative to the adjusting plate 3, and the limiting piece 21 is fixedly connected with the protective cover 1. The limiting piece 21 comprises a fixing portion 211, and the size of the fixing portion 211 is greater than that of the limiting groove 32. By arranging the limiting piece 21, the range of the included angle between the adjusting plate 3 and the protective cover 1 can be limited. The corresponding central angle of the limiting groove 32 is the adjustable range of the angle a between the adjusting plate 3 and the protective cover 1. By the above arrangement, the over-adjustment phenomenon during adjustment can be avoided, and the angle a between the adjusting plate 3 and the protective cover 1 can be adjusted within the set angle range. The size of the fixing portion 211 is greater than that of the limiting groove 32, so that the rotation of the adjusting plate 3 relative to the protective cover 1 is stable and reliable.

[0040] As shown in the drawings, Figure 3 and Figure 5As shown, the alignment plate 71 is disposed on one side of the adjustment plate 3 and is substantially vertically downward. In some embodiments, the alignment plate 71 is located on the side of the extension surface 34 close to the protective cover 1, which is compact in structure and convenient to use. In some embodiments, the alignment plate 71 is located on the side of the extension surface 34 close to the contact surface 33, which is convenient for the user to quickly align the cutting edge. The alignment plate 71 can be in contact with the side of the curb. When the user uses the tool head 100, the alignment plate 71 is aligned with the side of the curb, and the cutting path is ensured to match the direction of the curb before the cutting member 11 cuts, avoiding the situation that the initial cutting path is not neat. During the cutting process, since the alignment plate 71 is in contact with the side of the curb, the user can also adjust the cutting path of the tool head 100 in time by judging whether the alignment plate 71 is aligned with the side of the curb, so as to ensure that the cut grass edge is neat and beautiful. By setting the alignment plate 71, the cutting position of the cutting member 11 can be quickly determined when cutting weeds, so as to ensure that the trimmed weeds are neat and the trimming effect is guaranteed. The alignment plate 71 has a contour line 72, and the contour line 72 is configured to be in contact with the soil. The alignment plate 71 includes a discharge portion 73 and an alignment surface 74. When the power head 300 moves along the curb, the alignment surface 74 is in contact with the side of the curb. Part of the alignment plate 71 is immersed in the soil, and the contour line 72 is in contact with the soil. The soil generates resistance to the alignment plate 71. In some embodiments, at least part of the contour line 72 is substantially a straight line, so that the upward resistance of the soil to the alignment plate 71 is reduced, which is convenient to operate. In some embodiments, at least part of the contour line 72 is an arc line, and the radius of the arc line is greater than or equal to 15 mm and less than or equal to 60 mm. In this way, the arc line is connected with the straight line smoothly, and the resistance of the soil to the alignment plate 71 is reduced. The discharge portion 73 is connected with the extension surface 34. In some embodiments, the discharge portion 73 is a notch. The effective length of the discharge portion 73 in the extension direction of the first axis 101 is less than the effective length of the extension surface 34 in the extension direction of the first axis 101. In this way, the soil can be discharged from the discharge portion 73, and it is not easy to accumulate below and inside the adjustment plate 3, preventing the pollution of the adjustment plate 3.

[0041] In some embodiments, the gage plate 71 and the adjusting plate 3 are integrated. Specifically, the gage plate 71 and the adjusting plate 3 can be manufactured by sheet metal process. The gage plate 71 and the adjusting plate 3 are installed on the protective cover 1 by quick change screws. By adopting the integrated design of the gage plate 71 and the adjusting plate 3, on the one hand, the manufacturing is facilitated, and on the other hand, the strength of the connection between the gage plate 71 and the adjusting plate 3 is ensured. Moreover, the relative position between the gage plate 71 and the adjusting plate 3 will not change, ensuring the accuracy of the gage. In the process of use, since the adjusting plate 3 is in abutment with the upper surface of the curb, and the gage plate 71 is in abutment with the side surface of the curb, the gage plate 71 and the adjusting plate 3 are prone to wear after a period of use. The gage plate 71 and the adjusting plate 3 are integrated, so that the gage plate 71 and the adjusting plate 3 can be removed together, facilitating replacement and being simple and fast to operate. In other embodiments, the adjusting plate 3 and the gage plate 71 are detachably connected. The gage plate 71 is installed on the adjusting plate 3 by quick change screws, which can meet the needs of gaging on the one hand, and on the other hand, when the adjusting plate 3 is worn, the quick change screws can be removed, so that the gage plate 71 can be removed and installed on another adjusting plate 3.

[0042] In some embodiments, the gage assembly 7 comprises a laser gage, which can emit a laser to perform gaging. Specifically, in this embodiment, the laser gage can emit a laser or a laser fan area, and gage with the side surface of the curb as the reference surface. In other embodiments, two laser gages can also be adopted, one of which emits a laser that is always aligned with the curb, and the other emits a laser that moves with the cutting member 11. By adopting the laser gage, the accuracy of gaging can be ensured, and the gage plate 71 will not be worn.

[0043] In some embodiments, the tool head 100 further comprises a mounting plate 2 arranged on the protective cover 1. The roller 5 is rotatably arranged on the mounting plate 2, and the roller 5 can roll on the road surface. When performing trimming work, by arranging the roller 5, the tool head 100 is effectively supported by the road surface, reducing the labor intensity of the cleaner. Moreover, in the form of rolling, the tool head 100 is facilitated to move, improving the experience of operation.

[0044] In some embodiments, the mounting plate 2 is provided with a height adjusting groove 22, and the rotating shaft of the roller 5 is arranged in the height adjusting groove 22, and the position of the rotating shaft in the height adjusting groove 22 can be adjusted. In use, according to the height of the cleaner himself, the position of the roller 5 on the mounting plate 2 is adjusted, the height of the edging machine can be adjusted, so as to meet the use of cleaners of different heights, and improve the experience of operation.

[0045] As Figure 5As shown, this embodiment also provides a power tool 400, 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.

[0046] 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.

[0047] 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.

[0048] like Figure 6 As shown, this embodiment also provides a method for using a power tool 400 to operate the power tool 400 as described above, including the following steps:

[0049] S1. Place the contact surface of the adjusting plate 3 on the upper surface of the curb;

[0050] S2. Using the tool setting assembly 7, the cutting part 11 is set with reference to the side of the curb;

[0051] S3. Turn on the power head 300 to make the cutting part 11 start to rotate;

[0052] S4. Lift the connecting rod 200, and rotate the adjusting plate 3 relative to the protective cover 1, so that the cutting piece 11 is pressed down to start cutting;

[0053] S5. Press down the connecting rod 200, and the elastic device 6 drives the adjusting plate 3 to rotate relative to the protective cover 1, so that the cutting piece 11 is lifted to stop cutting.

[0054] By first aligning the cutting tool, then starting the power head 300, and then cutting, the weeds can be effectively cut, the motor is prevented from stalling, the service life of the cutting tool is ensured, and the user experience is improved. The user places the contact surface 33 of the adjusting plate 3 on the upper surface of the curb. At this time, the force of the power tool 400 on the adjusting plate 3 is less than the torsion of the elastic device 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 time, the angle a between the connecting rod 200 and the upper surface of the curb is less than or equal to 35 degrees. In some embodiments, the angle a between the connecting rod 200 and the upper surface of the curb is about 28 degrees. The user then aligns the cutting tool 11 with the curb by the aligning tool assembly 7. After the alignment is completed, the user starts the power head 300, and the cutting tool 11 rotates. At this time, the cutting tool 11 does not cut the soil, or cuts the soil shallowly. In this way, the cutting tool 11 will not stall due to too much resistance, and the motor will not stall. The user first aligns the cutting tool, then starts the power head 300, so that the cutting tool 11 will not collide with the curb, and the service life of the cutting tool 11 is improved. After the cutting tool 11 rotates stably, the cutting tool 11 has sufficient cutting power. At this time, the user holds the handle and lifts the connecting rod 200, that is, rotates the connecting rod 200 upward around the rotation axis of the roller 5. At this time, the tool head 100 moves downward relative to the roller 5, and the power head 300 moves upward relative to the roller 5. The center of gravity of the tool head 100 shifts away from the power head 300, and the force of the power tool 400 on the adjusting plate 3 gradually increases to be greater than the torsion of the elastic device 6. The adjusting plate 3 overcomes the torsion of the elastic device 6 and rotates relative to the protective cover 1. At the same time, the cutting tool 11 is pressed down with the protective cover 1 and starts to cut the soil and grass. The user adjusts the angle a at which the connecting rod 200 is lifted to adjust the cutting depth of the power tool 400. When the angle a at which the connecting rod 200 is lifted increases, the cutting depth of the power tool 400 increases. When the angle a at which the connecting rod 200 is lifted decreases, the cutting depth of the power tool 400 decreases. In this way, the power tool 400 can smoothly cut soil of different heights. The user pushes the power tool 400, and the power tool 400 cuts the soil and grass along the direction of the curb in alignment with the curb, with good cutting effect and convenient operation. After the cutting is completed, the user presses down the connecting rod 200, that is, rotates the connecting rod 200 downward around the roller 5. At this time, the tool head 100 moves upward relative to the roller 5, and the power head 300 moves downward relative to the roller 5. The center of gravity of the tool head 100 shifts toward the power head 300, and the force of the power tool 400 on the adjusting plate 3 gradually decreases to be less than the torsion of the elastic device 6. The elastic device 6 drives the adjusting plate 3 to rotate relative to the protective cover 1 until the adjusting plate 3 returns to the initial state. In this way, when the user uses the power tool 400 next time, the operation sequence remains unchanged.That is to say, when the user uses the power tool 400 next time, the user's operation steps are still to first hold the knife, then start the power head 300, and then operate the cutting member 11 to press down to cut the soil.

[0055] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation manners of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the implementation manners are not required or can not be exhausted. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A tool head (100), comprising: a protective cover (1), at least part of a cutting member (11) being rotatably arranged in the protective cover (1) ; characterized in that the tool head (100) further comprises: an adjusting plate (3) being rotatably arranged around a first axis (101), the adjusting plate (3) being configured to abut against an upper surface of a curb, the adjusting plate (3) having an initial state and an adjusting state, in the initial state, an angle between the adjusting plate (3) and the protective cover (1) being larger than in the adjusting state, in the adjusting state, the angle between the adjusting plate (3) and the protective cover (1) being adjusted, the cutting member (11) cutting soil when the adjusting plate (3) is in the adjusting state, the cutting member (11) not cutting soil when the adjusting plate (3) is in the initial state; a resilient device (6) configured to drive the adjusting plate (3) from the adjusting state to the initial state; a tool setting assembly (7) arranged on the adjusting plate (3), the tool setting assembly (7) being configured to prompt a user whether the cutting member (11) is vertically aligned with the curb.

2. The tool head of claim 1, wherein, One end of the resilient device (6) is fixed relative to the protective cover (1), and the other end of the resilient device (6) is fixed relative to the adjusting plate (3).

3. The tool head of claim 1, wherein, The tool head (100) comprises a dust cover (61) configured to accommodate at least part of the resilient device (6).

4. The tool head of claim 1, wherein, A limiting groove (32) is formed on the adjusting plate (3), and a limiting member (21) is connected with the protective cover (1) through the limiting groove (32).

5. The tool head of claim 1, wherein, The tool setting assembly (7) comprises a tool setting plate (71), the tool setting plate (71) being configured to fit against a side surface of the curb.

6. The tool head of claim 5, wherein, The tool setting plate (71) and the adjusting plate (3) are in an integrated structure.

7. The tool head of claim 1, wherein, The tool setting assembly (7) comprises a laser tool setter, the laser tool setter being configured to emit laser light for tool setting.

8. A power tool characterized by The power tool comprises a power head (300), a connecting rod (200), and the tool head (100) according to any one of claims 1-7, the tool head (100) being drivingly connected with the cutting member (11), one end of the connecting rod (200) being connected with the power head (300), and the other end of the connecting rod (200) being connected with the protective cover (1).

9. The power tool of claim 8, wherein, The power tool is an edging machine. 10.A method for using a power tool, the method being used for operating the power tool according to claim 8, and comprising the following steps: S1, placing a contact surface of the adjusting plate (3) on the upper surface of the curb; S2, using the tool setting assembly (7) to set the cutting member (11) by referring to a side surface of the curb; S3, turning on the power head (300), so that the cutting member (11) starts to rotate; S4, lifting the connecting rod (200), and rotating the adjusting plate (3) relative to the protective cover (1), so that the cutting member (11) is pressed down to start cutting; S5, the connecting rod (200) is pressed down, the elastic device (6) drives the adjusting plate (3) to rotate relative to the protective cover (1), so that the cutting part (11) is lifted to stop cutting.

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