Cutting device and control method

Abstract

This application discloses a cutting device and its control method, including a cutting system for cutting a workpiece. The cutting system includes: a motor providing power to the cutting system; a cutting assembly including a cutting element and a protective cover at least partially surrounding the cutting element, the cutting element rotating under the drive of the motor; the cutting system further includes: a first handle, the first handle having a switch assembly for controlling the switching of the motor's state. When the switch assembly is in a first state, the cutting system is de-energized and the protective cover can be positioned in a first position; when the switch assembly is in a second state, the cutting system is started and the protective cover is in a second position. This application improves the safety of starting the cutting system by linking the protective cover with the switch, effectively preventing accidental injury to the operator.

Description

[0001] This application claims priority to Chinese patent application No. 202210355621.6, filed on April 6, 2022, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to a power tool and control method, specifically to a cutting device and control method. Background Technology

[0003] Power tools, especially cutting tools, have high-speed rotating saw blades, which require high safety standards. In particular, when the cutting device is running, the guard needs to surround the saw blade to protect the user's safety. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this application is to provide a cutting device and control method with high safety and stability.

[0005] To achieve the above objectives, this application adopts the following technical solution: A cutting device includes a cutting system for cutting a workpiece, the cutting system comprising: a motor for providing power to the cutting system; a cutting assembly including a cutting element and a protective cover at least partially surrounding the cutting element, the cutting element rotating under the drive of the motor; the cutting system further comprising: a first handle having a switch assembly for controlling the switching of the motor's state, wherein when the switch assembly is in a first state, the cutting system is de-energized and the protective cover can be positioned in a first position; and when the switch assembly is in a second state, the cutting system is activated and the protective cover is in a second position.

[0006] In some embodiments, the first handle includes a locking element disposed between the switch assembly and the protective cover and linked to the switch assembly; when the switch assembly is in a first state, the locking element positions the protective cover in a first position; when the switch assembly is in a second state, the locking element releases the protective cover.

[0007] In some embodiments, the cover is formed with a positioning groove that engages with a locking portion, and when the locking portion engages with the positioning groove, the cover is in a first position.

[0008] In some embodiments, the locking member is rotatably connected to the first handle via a first pivot, and the locking part rotates about the first pivot.

[0009] In some embodiments, the first handle includes a biasing member connected to the locking member, which provides a force for releasing the locking member when the switch assembly is in a second state.

[0010] In some embodiments, a first handle forms a grip, and the switch assembly is disposed on the grip.

[0011] In some embodiments, the first handle includes a housing, the grip portion is formed on the housing and has an opening, and the switch assembly is disposed within the opening.

[0012] In some embodiments, when the shield is in a first position, the first handle is located on one side of the shield.

[0013] In some embodiments, the switch assembly includes a first pressing part and a second pressing part, which are connected by a connecting part, and there is a gap between the first pressing part and the second pressing part.

[0014] In some embodiments, a first handle forms a grip portion having an opening, and a first pressing portion and a second pressing portion are located on opposite sides of the opening.

[0015] In some embodiments, when the switch component moves along a first direction, it switches from a first state to a second state; when the switch component moves along a second direction opposite to the first direction, it switches from a second state to a first state.

[0016] In some embodiments, the switch assembly is connected to the first handle via a second pivot, and the switch assembly rotates about the second pivot.

[0017] In some embodiments, the first handle further includes a limiting member that exerts a force on the switch assembly when the switch assembly is in a first state, so that the switch assembly is stationary relative to the cover.

[0018] In some embodiments, the switch assembly includes a first pressing portion and a second pressing portion, and the limiting member abuts against one end of the first pressing portion.

[0019] In some embodiments, the limiting member can deform under the action of an external force. When the switch assembly switches from a first state to a second state, the switch assembly causes the limiting member to deform so that the force exerted by the limiting member on the switch assembly is reduced until it is less than the external force.

[0020] In some embodiments, the cutting system further includes a sensing element and a controller, wherein the sensing element detects the position of the shield and transmits the information to the controller; when the switching assembly switches to the second state, the controller first determines the position of the shield, and when the shield is in the second position, the controller starts the cutting system.

[0021] In some embodiments, the cutting assembly further includes a retaining cover disposed above the cutting element and at least partially surrounding the cutting element; the retaining cover is disposed between the protective cover and the cutting element.

[0022] In some embodiments, the protective cover overlaps with the fixed cover, and the overlap area between the protective cover and the fixed cover at a first position is greater than the overlap area between the protective cover and the fixed cover at a second position.

[0023] In some embodiments, the drive assembly includes a housing, the fixed cover is connected to the housing, the housing houses a transmission device and a motor, and the housing is connected to a first handle.

[0024] A cutting apparatus includes a cutting system for cutting a workpiece, the cutting system comprising: a motor for providing power to the cutting system; a cutting assembly including a cutting element and a protective cover at least partially surrounding the cutting element, the cutting element rotating under the drive of the motor; the cutting system further comprising: a switching assembly for controlling the switching of the motor state, wherein when the switching assembly is in a first state, the cutting system is de-energized and the protective cover can be positioned in a first position; and when the switching assembly is in a second state, the cutting system is activated and the protective cover is positioned in a second position.

[0025] In some embodiments, the cutting assembly further includes a retaining cover disposed above the cutting element and at least partially surrounding the cutting element; the retaining cover is disposed between the protective cover and the cutting element.

[0026] In some embodiments, the protective cover and the fixed cover are arranged overlappingly, and the overlapping area of ​​the protective cover and the fixed cover at a first position is greater than the overlapping area of ​​the protective cover and the fixed cover at a second position.

[0027] A control method for a cutting device, the cutting device comprising: a motor for providing power to the cutting system; a cutting assembly including a cutting element and a protective cover at least partially surrounding the cutting element, the cutting element rotating under the drive of the motor; a switching assembly for controlling the switching of the motor state, including a first state and a second state; the cutting device further comprising a sensing element and a controller, the sensing element being capable of detecting the position of the protective cover and transmitting position information to the controller. The control method includes the steps of: when the controller detects that the switching assembly has switched from the first state to the second state, the controller determines the position of the protective cover based on the position information; when the protective cover is in the second position, the controller controls the cutting system to start; when the protective cover is in the first position and the switching assembly has switched to the second state, the controller controls the cutting system not to start.

[0028] In some embodiments, the cutting system further includes an indicator element, and the control method further includes the step of: when the controller simultaneously receives signals that the switching assembly has reached a second state and the shield is in a first position, the controller causes the indicator element to emit an indicator signal.

[0029] The advantages of this application are: by linking the protective cover with the switch, this application improves the safety of starting the cutting system and can effectively prevent accidental injury to the operator. Attached Figure Description

[0030] Figure 1 A perspective view of a cutting apparatus provided in an embodiment of this application; Figure 2 A perspective view of a cutting system provided in an embodiment of this application; Figure 3 A top view of a cutting system provided in an embodiment of this application; Figure 4 A schematic diagram of the internal structure of the first handle provided in an embodiment of this application; Figure 5 for Figure 4 A partial structural diagram of structure A in the middle; Figure 6 for Figure 4 A partial structural diagram of structure A when the switching component is in the second state; Figure 7 A flowchart of a control method provided in an embodiment of this application. Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] For ease of explanation of the technical solution of this application, the following are also defined: Figure 1 The middle arrows indicate up, down, forward, backward, left, and right. In this implementation, up, down, left, and right all refer to... Figure 1 Take the state of the cutting device in the example.

[0033] The cutting device 1000 includes a cutting system 1, which refers to a series of components that complete the cutting operation, mainly including a cutting component 10, a drive component 20, etc. Depending on the function of the cutting device 1000, the cutting system 1 varies. The cutting device 1000 of this application takes a table-type cutting device as an example, especially a slanted saw, such as... Figure 1 As shown, it also includes a worktable and a frame that supports the cutting system.

[0034] like Figure 1 As shown, the cutting device 1000 includes a related cutting system, which includes a cutting assembly 10' and a drive assembly 20'. The cutting assembly 10' includes a cutting element ( Figure 1 (Not shown) and a protective cover 110' at least partially surrounding the cutting element. A drive assembly 20' provides power to the cutting system. To lock the protective cover 110', a linkage 3 is typically provided connecting the protective cover 110' and the frame. The linkage 3 has a sliding hole at one end near the protective cover 110', and the protective cover 110' is connected to the sliding hole via a sliding post. When the protective cover 110' rotates, the sliding post moves within the sliding hole. The protective cover can rotate between a first position and a second position. Specifically, the first position can be referred to... Figure 1 The second position can be referenced. Figure 2 The area of ​​the shield covering the cutting part in the second position is greater than the area of ​​the shield covering the cutting part in the first position.

[0035] When the protective cover 110' is subjected to external force, it is as follows Figure 1 When the device moves from the second position to the first position, the sliding column moves from one end of the sliding hole to the other. At this time, the protective cover 110' remains stationary in the first position due to the combined effects of friction, gravity, and the force exerted by the connecting rod 3 on the sliding column. In this structure, if an external force is applied to the protective cover 110' in the first position, such as due to operator error, it will disrupt the balance of the protective cover 110' and cause it to fall, affecting normal operation. In this structure, another situation may occur when the connection between the connecting rod 3 and the sliding column is too tight, making it difficult for the protective cover 110' to easily fall to the second position. If the switch is accidentally activated at this time, causing the device to start, the high-speed rotation of the cutting piece will pose a danger to the operator.

[0036] like Figure 2 As shown, this application provides another adaptation. Figure 1 The cutting system 1 of the medium cutting device 1000 includes a cutting assembly 10 and a drive assembly 20. The cutting assembly 10 includes a cutting element 120 and a protective cover 110 disposed at least partially around the cutting element 120. The drive assembly 20 includes a motor 211 that provides power to the cutting system 1 (see...). Figure 4The cutting element 120 rotates under the drive of the motor 211. The protective cover 110 moves between a first position and a second position, specifically rotating about a first axis 101 between the first and second positions. Specifically, under certain circumstances, the protective cover 110 can remain stationary in the first position, and when other components act, the protective cover 110 is released and falls freely, rotating to the second position. This second position refers to a set of multiple possible positions different from the first position. The protective cover 110 will remain in the second position if it interferes with other components of the cutting device, such as the worktable, or under the influence of gravity. The coverage area of ​​the protective cover 110 over the cutting element 120 in the second position is greater than its coverage area over the cutting element 120 in the first position.

[0037] like Figure 3 As shown, the drive assembly 20 includes a housing 210, within which a motor 211 and a transmission device are housed. The motor 211 is connected to the cutting piece 120 via the transmission device. The motor 211 provides rotational power to the cutting piece 120. The housing 210 is located on one side of the protective cover 110 in the left-right direction.

[0038] The cutting system 1 also includes a first handle 30 for the user to hold and operate the cutting device. In the miter saw of this embodiment, the cutting system 1 can move relative to the worktable, and the relative position of the cutting system 1 can be moved by operating the first handle 30. For ease of operation, the first handle 30 is generally located near the cutting assembly 10. Specifically, in this embodiment, the first handle 30 is connected to the housing 210 and extends towards the front of the cutting system 1.

[0039] The first handle 30 is equipped with a switch assembly 310 for controlling the state switching of the motor 211. The switch assembly 310 includes a first state and a second state. In some specific embodiments, the first state refers to the switch assembly 310 being in a closed state, and the second state refers to the switch assembly 310 being in an open state. For example... Figure 4 As shown, when the switch assembly 310 is in the first state, the cutting system 1 is de-energized and the protective cover 110 is in the first position. Figure 6 As shown, when the switch assembly 310 is in the second state, the cutting system 1 is activated and the protective cover 110 is in the second position. The switch assembly 310 includes conductive electronic components. The second state mentioned above refers to the state in which the electronic components in the switch assembly 310 are conductive, and does not refer to a specific position of the switch assembly 310. The first state refers to the state in which the electronic components in the switch assembly 310 are not conductive.

[0040] like Figure 3As shown, the first handle 30 forms a grip portion 320 for a user to hold, and a switch assembly 310 is disposed in the grip portion 320. Further, the first handle 30 includes a housing 300, the grip portion 320 is formed on the housing 300 and has an opening 321. The switch assembly 310 is disposed within the opening 321 and is primarily located on one side of the opening 321.

[0041] like Figure 5 As shown, the switch assembly 310 includes a first pressing part 311 and a second pressing part 312, which are connected by a connecting part 313. A gap exists between the first pressing part 311 and the second pressing part 312 to allow for operation by the user's hand. Specifically, the first pressing part 311 and the second pressing part 312 are located on opposite sides within the opening 321. The switch assembly 310 is positioned along a first direction X (see...). Figure 4 During movement, the switch assembly 310 switches from a first state to a second state. When the switch assembly 310 moves along a second direction opposite to the first direction X, it switches from the second state to the first state. The switch assembly 310 is connected via a second rotating shaft 315 (see...). Figure 4 The housing 300 is connected to the first handle, and the switch assembly 310 rotates around the second pivot 315.

[0042] The first handle 30 includes locking element 330 (see...) Figure 5 A locking member 330 is disposed between the switch assembly 310 and the protective cover 110, and is linked with the switch assembly 310. When the switch assembly 310 is in a first state, the locking member 330 positions the protective cover 110 in a first position. When the switch assembly 310 is in a second state, the locking member 330 releases the protective cover 110, and the protective cover 110 immediately reaches the second position. The locking member 330 has a locking part 331, and the protective cover 110 has a positioning groove 111 that engages with the locking part 331. When the locking part 330 engages with the positioning groove 111, the protective cover 110 is in the first position. Specifically, when the protective cover 110 is in the first position, the first handle 30 is located on one side of the protective cover 110. The locking member 330 is rotatably connected to the housing 300 of the first handle 30 via a first rotating shaft 332, and the locking part 330 rotates around the first rotating shaft 332.

[0043] Specifically, the locking member 330 is linked to the switch assembly 310 and rotates as the switch assembly 310 rotates. A protruding limiting portion 314 is formed at the end of the switch assembly 310 facing the cover 110. When the switch assembly 310 is in the first state, the limiting portion 314 abuts against the locking member 330, such as... Figure 5 As shown, the locking member 330 is in the locked position at this time. When the switch assembly 310 is in the second state, the limiting part 314 releases the locking member 330, as shown. Figure 6As shown, the locking member 330 is in the released position at this time. The first handle 30 includes a biasing member 316, which connects to the locking member 330 and provides force to the locking member 330. When the switch assembly 310 is in the first state, the limiting part 314 abuts against the locking member 330, causing the locking member 330 to engage with the positioning groove 111 to lock the cover 110, while the locking member 330 compresses the biasing member 316. When the switch assembly 310 is in the second state, that is, when the switch assembly 310 moves away from the locking member 220, the biasing member 316 returns to its compressed state, while providing a force to release the locking member 330. Specifically, the locking member 330 may also be provided with a biasing part for connecting with the biasing member 316.

[0044] A limiting groove 333 is provided at the abutment point between the locking member 330 and the limiting part 314, and the limiting groove 333 matches the shape of the limiting part 314. Figure 5 As shown, when the switch assembly 310 is in the first state, the limiting part 314 abuts against the limiting groove 333. Figure 6 As shown, when the switch assembly 310 is in the second state, the limiting part 314 disengages from the limiting groove 333, releasing the locking member 330, as... Figure 6 As shown, the locking member 330 is in the released position at this time. The locking member 330 in the released position retracts into the receiving space of the housing 300.

[0045] In other embodiments, the switch assembly 310 may not be provided on the first handle 30, or in other types of cutting devices, the handle may not be provided, in which case the switch assembly 310 may be provided at least near the cover 110.

[0046] The first step 30 is also equipped with a limiter 340 (see...) Figure 6 When the switch assembly 310 is in the first state, the limiting member 340 exerts a force on the switch assembly 310 to keep the switch assembly 310 relatively stationary with respect to the cover 110. The limiting member 340 can deform under the action of an external force. When the switch assembly 310 switches from the first state to the second state, the switch assembly 310 causes the limiting member 340 to deform, thereby reducing the force exerted by the limiting member 340 on the switch assembly 310 until it is less than the external force. Specifically, the limiting member 340 includes an elastic member 341, which extends outward and abuts against one end of the switch assembly 310 when the switch assembly 310 is in the first state, especially against the end of the first pressing part 311 facing the cover 110. When the switch assembly 310 is in the first state, the elastic member 341 is compressed, generating a force on the switch assembly 310, making the switch assembly 310 more stably maintained in the first state. When the switch assembly 310 moves to the second state under the action of an external force, the elastic member 341 resets, and the force decreases or disappears.

[0047] The cutting assembly 10 also includes a retaining cover 130 (see Figure 4A fixing cover 130 is disposed above the cutting element 120 and at least partially surrounds the cutting element 120. The fixing cover 130 is located between the protective cover 110 and the cutting element 120, and the fixing cover 130 remains relatively stationary. That is, the protective cover 110 and the fixing cover 130 overlap, and the overlap area of ​​the protective cover 110 and the fixing cover 130 in the first position is greater than the overlap area of ​​the protective cover 110 and the fixing cover 130 in the second position. Specifically, the fixing cover 130 exposes part of the cutting element 120, while part of it is disposed within the fixing cover 130. For the portion of the cutting element 120 exposed within the fixing cover 130, the protective cover 110 does not cover or only partially covers this exposed portion in the first position, and the protective cover 110 covers the exposed portion of the cutting element 120 in the second position to ensure the safety of the cutting system 1. The fixing cover 130 is connected to the housing 210, and the housing 210 is connected to the casing 300.

[0048] The cutting system 1 also includes a second handle 40 (see...) Figure 4 The second handle 40 is located behind the protective cover 110 and can be located at the connection between the fixed cover 130 and the frame. It is used to assist in adjusting the position of the cutting system 1. When the cutting device 1000 is a non-table cutting device, the second handle 40 can be used as the main handle.

[0049] In another embodiment of this application, the linkage between the protective cover 110 and the switch assembly 310 can be achieved by controlling the cutting system 1. The cutting system 1 also includes a sensing element and a controller (not shown in the figure). The sensing element is generally located at the edge of the protective cover 110 or near the protective cover 110, and the controller is generally integrated on the main circuit board of the cutting device 1000. The sensing element detects the position of the protective cover 110 and transmits the information to the controller. When the switch assembly 310 switches to the second state, the controller first determines the position of the protective cover 110. When the protective cover 110 is in the second position, the controller starts the cutting system 1. The cutting system 1 also includes an indicator element. When the controller simultaneously receives signals that the switch assembly 310 has reached the second state and that the protective cover 110 is in the first position, the controller causes the indicator element to emit an indicator signal. This indicator signal includes sound, light, etc., to prompt the user that the current state of the protective cover 110 does not meet the start-up requirements of the cutting system 1.

[0050] The controller's control logic for cutting system 1 is as follows: Figure 7As shown, the specific control process is as follows: First, the controller detects the state of the switch assembly 310. When the switch assembly 310 is in the first state, no operation is performed until the switch assembly 310 is switched to the second state. Second, when the switch assembly 310 is switched to the second state, the controller queries the signal transmitted by the sensing element, which is used to determine the position of the cover 110. Third, when the signal fed back by the sensing element shows that the cover 110 is in the first position, the controller controls the indicator element to issue a reminder, mainly in the form of sound alarm, indicator light flashing, etc. When the signal fed back by the sensing element shows that the cover 110 is in the second position, the controller controls the cutting system 1 to execute the main cycle, that is, to start the motor 211 to perform cutting, etc.

[0051] Specifically, the sensing element includes, but is not limited to, photoelectric switches, micro switches, magnetic switches, and encoders. When the sensing element is a photoelectric switch, micro switch, magnetic switch, or similar element, the sensing element is located at the edge of the cover 110. When the sensing element is an encoder, the sensing element is located at the rotation axis of the cover 110, and a position signal is output by detecting the rotation angle.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this application.

Claims

1. A cutting apparatus comprising a cutting system for cutting a workpiece, the cutting system comprising: The motor provides power to the cutting system; A cutting assembly includes a cutting element and a protective cover disposed at least partially around the cutting element, the cutting element rotating under the drive of the motor; A worktable is used to support the workpiece to be cut, and the cutting system is movable relative to the worktable; The cutting system is characterized in that it further includes: The first handle is equipped with a switch assembly for controlling the switching of the motor's state. When the switch assembly is in the first state, the cutting system is powered off and the cover can be positioned in the first position; when the switch assembly is in the second state, the cutting system is started and the cover is in the second position, the coverage area of ​​the cover on the cutting part in the second position is greater than the coverage area of ​​the cover on the cutting part in the first position.

2. The cutting device according to claim 1, characterized in that, The first handle includes a locking element, which is disposed between the switch assembly and the protective cover and is linked to the switch assembly; when the switch assembly is in a first state, the locking element positions the protective cover in a first position; when the switch assembly is in a second state, the locking element releases the protective cover.

3. The cutting device according to claim 2, characterized in that, The locking member has a locking portion, and the protective cover has a positioning groove that engages with the locking portion. When the locking portion engages with the positioning groove, the protective cover is in a first position.

4. The cutting device according to claim 3, characterized in that, The locking element is rotatably connected to the first handle via a first pivot, and the locking part rotates around the first pivot.

5. The cutting device according to claim 2, characterized in that, The first handle includes a biasing member connected to the locking member, which provides a force for releasing the locking member when the switch assembly is in the second state.

6. The cutting device according to claim 1, characterized in that, The first handle forms a grip portion, and the switch assembly is disposed on the grip portion.

7. The cutting device according to claim 6, characterized in that, The first handle includes a housing, the grip portion is formed on the housing and has an opening, and the switch assembly is disposed within the opening.

8. The cutting device according to claim 1, characterized in that, When the shield is in the first position, the first handle is located on one side of the shield.

9. The cutting device according to claim 1, characterized in that, The switch assembly includes a first pressing part and a second pressing part, which are connected by a connecting part, and there is a gap between the first pressing part and the second pressing part.

10. The cutting device according to claim 9, characterized in that, The first handle forms a grip portion, the grip portion has an opening, and the first pressing portion and the second pressing portion are located on both sides of the opening.

11. The cutting device according to claim 1, characterized in that, The switch assembly is connected to the first handle via a second pivot, and the switch assembly rotates around the second pivot.

12. The cutting device according to claim 1, characterized in that, The first handle also includes a limiting member, which exerts a force on the switch assembly when the switch assembly is in the first state, so that the switch assembly is relatively stationary with respect to the cover.

13. The cutting device according to claim 12, characterized in that, The switch assembly includes a first pressing part and a second pressing part, and the limiting member abuts against one end of the first pressing part.

14. The cutting device according to claim 12, characterized in that, The limiting member can deform under the action of external force. When the switch assembly switches from the first state to the second state, the switch assembly causes the limiting member to deform so that the force exerted by the limiting member on the switch assembly is reduced until it is less than the external force.

15. The cutting device according to claim 1, characterized in that, The cutting assembly further includes a fixing cover, which is disposed above the cutting element and at least partially surrounds the cutting element; the fixing cover is disposed between the protective cover and the cutting element.

16. A cutting apparatus comprising a cutting system for cutting a workpiece, the cutting system comprising: The motor provides power to the cutting system; A cutting assembly includes a cutting element and a protective cover disposed at least partially around the cutting element, the cutting element rotating under the drive of the motor; A worktable is used to support the workpiece to be cut, and the cutting system is movable relative to the worktable; The cutting system is characterized in that it further includes a switch assembly for controlling the switching of the motor state; when the switch assembly is in a first state, the cutting system is powered off and the protective cover can be positioned in a first position; when the switch assembly is in a second state, the cutting system is started and the protective cover is in a second position, wherein the coverage area of ​​the protective cover on the cut piece in the second position is greater than the coverage area of ​​the protective cover on the cut piece in the first position.

17. The cutting device according to claim 16, characterized in that, The cutting assembly further includes a fixing cover, which is disposed above the cutting element and at least partially surrounds the cutting element; the fixing cover is disposed between the protective cover and the cutting element.

18. The cutting device according to claim 17, characterized in that, The protective cover and the fixed cover are arranged overlappingly, and the overlapping area of ​​the protective cover and the fixed cover at the first position is greater than the overlapping area of ​​the protective cover and the fixed cover at the second position.

19. A method for controlling a cutting device, comprising a cutting system for completing the cutting of a workpiece, the cutting system comprising: The motor provides power to the cutting system; A cutting assembly includes a cutting element and a protective cover disposed at least partially around the cutting element, the cutting element rotating under the drive of the motor; A worktable is used to support the workpiece to be cut, and the cutting system is movable relative to the worktable; a switching assembly is used to control the switching of the motor state, including a first state and a second state; Its features are, The cutting device further includes a sensing element and a controller; the sensing element can detect the position of the protective cover and transmit the position information to the controller; the control method includes the following steps: When the controller detects that the switch assembly has switched from the first state to the second state, the controller determines the position of the protective cover based on the position information; When the protective cover is in the second position, the controller activates the cutting system; When the protective cover is in the first position and the switch assembly is switched to the second state, the controller controls the cutting system not to start; Wherein, the area of ​​the protective cover covering the cutting component when it is in the second position is greater than the area of ​​the protective cover covering the cutting component when it is in the first position.

20. The control method for the cutting device according to claim 19, characterized in that, The cutting device further includes an indicating element, and the control method further includes the steps of: When the controller simultaneously receives signals that the switch assembly has reached the second state and the shield is in the first position, the controller controls the indicator element to issue an indicator signal.

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