An electric circular saw with a braking structure

Abstract

This utility model discloses an electric circular saw with a braking structure, including a base, a saw body assembly, a switch assembly, and a safety locking mechanism. The safety locking mechanism includes an operating component, a linkage mechanism, a braking component, and a first elastic component. The driving component is equipped with a brake disc, and the first elastic component is provided between the braking component and the base. The linkage mechanism is connected to both the operating component and the braking component. When the operating component moves to the unlocked position, the linkage mechanism drives the braking component away from the brake disc. When the operating component moves to the locked position, the first elastic component drives the braking component to engage with the brake disc for braking. When the operating component moves to the unlocked position, the switch assembly is movable. When the operating component moves to the locked position, either the operating component or the linkage mechanism engages with the switch assembly to restrict its movement. The safety locking mechanism and the switch assembly can be mutually locked to prevent accidental activation of the switch assembly, ensuring good safety. Furthermore, the braking mechanism is controlled by a mechanical linkage, resulting in high reliability.

Description

Technical Field

[0001] This utility model relates to the field of electric saw technology, and in particular to an electric circular saw with a braking structure. Background Technology

[0002] Currently, most circular saws on the market lack effective braking mechanisms. Their operation is generally quite simple, typically controlling the motor's operation via a trigger switch button and cutting off power when the button is off. However, due to the significant inertia of the saw blade and motor system, the saw blade continues to rotate for a considerable period after the power is cut off. This phenomenon easily leads to accidental activation or unintended cutting during actual operation, posing a significant safety hazard. Although some existing circular saws have attempted to incorporate braking mechanisms to improve safety, their designs often directly couple the braking action to the switch button—that is, the brake is triggered when the switch is off, and released and the motor starts when the switch is on. This high degree of integration between mechanical and electrical functions leads to decreased reliability and may cause response failure when braking is required. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an electric circular saw with a braking structure, which can safely and stably brake the electric circular saw.

[0004] According to a first aspect of the present invention, an electric circular saw with a braking structure includes: a base, a saw body assembly, a switch assembly, and a safety locking mechanism. The saw body assembly is disposed on the base and includes a drive component and a saw blade. The saw blade is pultrusively connected to the drive component, and the drive component can drive the saw blade to rotate. The switch assembly is movably connected to the base and connected to the drive component, and the switch assembly can control the switching of the drive component. The safety locking mechanism includes an operating member, a linkage mechanism, a braking member, and a first elastic member. The operating member is movably connected to the base and can move to a locked position and an unlocked position. The drive component is disposed on the base. The device includes a brake disc, and a first elastic element is provided between the brake element and the base. The linkage mechanism is connected to the operating element and the brake element respectively. When the operating element moves to the unlock position, the linkage mechanism can drive the brake element away from the brake disc and compress the first elastic element. When the operating element moves to the locked position, the first elastic element can drive the brake element to abut against the brake disc for braking. When the operating element moves to the unlock position, the switch assembly can move. When the operating element moves to the locked position, the operating element or the linkage mechanism can abut against the switch assembly to restrict the movement of the switch assembly.

[0005] According to an embodiment of the present invention, an electric circular saw with a braking structure has at least the following beneficial effects: the safety locking mechanism and the switch assembly can be locked together. When the saw body needs to be run, the operating member needs to be moved to the unlocked position. The linkage mechanism can drive the brake member to release the brake. At this time, the switch assembly can be operated to control the power supply of the drive component and drive the saw blade to run. When the operation is finished, the switch assembly is closed. At this time, the operating member can be released. The elastic force of the first elastic member can drive the brake member to brake and drive the operating member to return to the locked position through the linkage mechanism. At the same time, the operating member or the linkage mechanism and the switch assembly are limited to prevent the switch assembly from being accidentally started. The safety is good, and the braking part is controlled by mechanical linkage, which has high reliability.

[0006] According to some embodiments of the present invention, the operating member is slidably connected to the base, the linkage mechanism includes a linkage rod, the linkage rod has a pivot part in the middle that is pivotally connected to the base, one end of the linkage rod is throttle connected to the operating member, and the other end is throttle connected to the brake member, and the operating member can drive the linkage rod to rotate around the pivot part.

[0007] According to some embodiments of the present invention, the linkage rod is further provided with a first limiting part, which is located between the pivot part and the operating member. The switch assembly includes a button, which has a second limiting part. The button has a pressed state and a released state. In the released state, when the operating member moves to the locked position, the first limiting part can abut against the second limiting part to restrict the button from moving to the pressed state.

[0008] According to some embodiments of this utility model, the braking component includes a transmission frame and a brake pad. One end of the transmission frame is pivotally connected to the base, and the other end is provided with a first hook. The linkage rod is provided with a second hook. The brake pad is installed on the side of the transmission frame near the brake disc. One end of the first elastic member is connected to the side of the brake pad away from the brake disc, and the other end is connected to the base. When the operating component moves to the unlocking position, the second hook can cooperate with the first hook and drive the transmission frame to rotate in a direction away from the brake disc.

[0009] According to some embodiments of the present invention, the outer peripheral wall of the brake disc is provided as a brake surface, and the brake disc has an annular groove facing a lateral opening, and the brake pad can abut against the brake surface for braking.

[0010] According to some embodiments of this utility model, the base includes a fixed base and a grip base. The grip base is rotatably connected to the fixed base. The saw body assembly, the switch assembly, and the safety locking mechanism are all disposed on the grip base. The safety locking mechanism further includes a locking pin that is drivenly connected to the linkage mechanism. The grip base can be rotated to a working position and a retracted position. The fixed base is provided with a locking hole. When the grip base is rotated to the retracted position, the locking hole can be aligned with the locking pin. When the operating member moves to the locked position, the locking pin can be inserted into the locking hole. When the operating member moves to the unlocked position, the locking pin can disengage from the locking hole.

[0011] According to some embodiments of the present invention, the linkage rod is provided with a transmission part, the transmission part is provided with a through hole for the locking pin to pass through, and the transmission part is provided with a transmission inclined surface on the side away from the locking hole. The locking pin is provided with a transmission boss that abuts against the transmission inclined surface. A second elastic element is provided between the transmission boss and the base. When the transmission inclined surface is switched from the locking position to the unlocking position, the rotation direction of the linkage rod is inclined toward the locking hole.

[0012] According to some embodiments of the present invention, the grip seat is provided with a handle, the operating component is located on the outside of the handle, and the switch assembly is located on the inside of the handle.

[0013] According to some embodiments of the present invention, the fixed base is further provided with a clearance hole. When the grip is in the position between the working position and the retracted position, the clearance hole can be opposite to the locking pin. When the operating member moves to the locking position, the locking pin can be inserted into the clearance hole.

[0014] According to some embodiments of the present invention, the clearance hole extends along the rotation direction of the grip and is spaced apart from the locking hole.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of some embodiments of the present utility model;

[0018] Figure 2 for Figure 1 A diagram showing the other direction;

[0019] Figure 3 for Figure 1 Exploded view of the structure;

[0020] Figure 4 for Figure 3 A diagram showing the other direction;

[0021] Figure 5 This is a schematic diagram of the safety locking mechanism and switch assembly in the locked position.

[0022] Figure 6 This is a structural diagram of the safety locking mechanism and switch assembly in the unlocked position;

[0023] Figure 7 This is a schematic diagram of the safety locking mechanism and switch assembly in the locked position.

[0024] Figure 8 This is a schematic diagram of the safety locking mechanism and switch assembly in the locked position.

[0025] Figure 9 This is a schematic diagram of the linkage mechanism;

[0026] Figure 10 for Figure 9 A diagram showing the other direction;

[0027] Figure 11 This is a schematic diagram of the structure of some embodiments of the braking component.

[0028] Figure label:

[0029] Base 100, fixed base 110, locking hole 111, clearance hole 112, grip base 120, handle piece 121;

[0030] Drive component 210, brake disc 211, brake surface 2111, annular groove 2112, saw blade 220;

[0031] Switch assembly 300, button 310, second limit part 311, switch element 320;

[0032] Operating component 410, linkage rod 420, second hook body 421, transmission part 422, through hole 423, transmission inclined surface 424, pivot part 425, first limiting part 426, braking component 430, transmission frame 431, first hook body 4311, brake pad 432, pin 433, first elastic component 440, locking post 450, transmission boss 451, second elastic component 452. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] Reference Figures 1 to 8According to a first aspect of the present invention, an electric circular saw with a braking structure includes a base 100, a saw body assembly, a switch assembly 300, and a safety locking mechanism. The saw body assembly is disposed on the base 100 and includes a drive component 210 and a saw blade 220. The saw blade 220 is convexly connected to the drive component 210, and the drive component 210 can drive the saw blade 220 to rotate. The switch assembly 300 is movably connected to the base 100 and connected to the drive component 210, and the switch assembly 300 can control the switching of the drive component 210. The safety locking mechanism includes an operating member 410, a linkage mechanism, a braking member 430, and a first elastic member 440. The operating member 410 is movably connected to the base 100 and can move to the locked position and unlock. In the driving component 210, a brake disc 211 is provided. A first elastic element 440 is provided between the brake element 430 and the base 100. The linkage mechanism is connected to the operating component 410 and the brake element 430 respectively. When the operating component 410 moves to the unlock position, the linkage mechanism can drive the brake element 430 away from the brake disc 211 and compress the first elastic element 440. When the operating component 410 moves to the locked position, the first elastic element 440 can drive the brake element 430 to abut against the brake disc 211 for braking. When the operating component 410 moves to the unlock position, the switch assembly 300 can move. When the operating component 410 moves to the locked position, the operating component 410 or the linkage mechanism can abut against the switch assembly 300 to restrict the movement of the switch assembly 300. The safety locking mechanism and the switch assembly 300 can be locked together. When the saw body needs to be operated, the operating member 410 needs to be moved to the unlocked position. The linkage mechanism can drive the brake member 430 to release the brake. At this time, the switch assembly 300 can be operated to control the power supply of the drive component 210 and drive the saw blade 220 to run. When the operation is over, the switch assembly 300 is closed. At this time, the operating member 410 can be released. The elastic force of the first elastic member 440 can drive the brake member 430 to brake and drive the operating member 410 to reset to the locked position through the linkage mechanism. At the same time, the operating member 410 or the linkage mechanism and the switch assembly 300 are limited to prevent the switch assembly 300 from being started by mistake. The safety is good and the braking part is controlled by mechanical linkage, which has high reliability.

[0037] Specifically, the user can operate the circular saw by holding the base 100. The switch assembly 300 and the operating element 410 are both located on the base 100 in easily accessible positions. The drive component 210 can be a drive motor and a gear transmission mechanism. A brake disc 211 can be mounted on the output shaft of the drive motor. The brake element 430 can be located circumferentially on the brake disc 211 and positioned by the base 100. The first elastic element 440 between the brake element 430 and the base 100 can be a spring. The spring can drive the brake element 430 to press against the brake disc 211 to brake, thus achieving the braking function. The operating element 410 can be operated by the user to the unlocked and locked positions. When using the circular saw, it is necessary to first switch to the unlocked position. At this time, the linkage mechanism can drive the brake element 430 to disengage from the brake disc 211 to unlock. The linkage mechanism will not be described in detail here. At this time, the switch assembly 300 can also be operated to the open state. Understandably, when the switch assembly 300 is in the open state, the linkage mechanism and the switch assembly 300 cannot engage in a limiting action, thus preventing the operating member 410 from moving to the locked position and thus avoiding accidental braking. However, when the switch assembly 300 is closed, the operating member 410 can move to the locked position. At this time, the first elastic member 440 can drive the braking member 430 towards the brake disc 211 and engage the linkage mechanism and the switch assembly 300 in a limiting action.

[0038] It is conceivable that a tension spring could also be provided between the operating element 410 and the base 100. The tension spring can drive the operating element 410 to slide toward the locking position, so that the operating element 410 can automatically reset to the locking position, making operation more convenient.

[0039] The above structure allows the brake mechanism to be decoupled from the switch assembly 300. The brake is controlled by the operating element 410 and the linkage mechanism, making the mechanical structure more stable and preventing the switch assembly 300 from opening, thus enhancing safety.

[0040] Reference Figures 3 to 4In some embodiments of this utility model, the operating member 410 is slidably connected to the base 100, and the linkage mechanism includes a linkage rod 420. The linkage rod 420 has a pivot portion 425 in its middle that is pivotally connected to the base 100. One end of the linkage rod 420 is driveably connected to the operating member 410, and the other end is driveably connected to the brake member 430. The operating member 410 can drive the linkage rod 420 to rotate around the pivot portion 425. Specifically, the operating member 410 can be configured as a sliding button structure. The operating member 410 can have a groove that cooperates with the linkage rod 420. When the operating member 410 is slidable, it can drive the linkage rod 420 to rotate. When the operating member 410 is in the unlocked position, the rotation of the linkage rod 420 can drive the brake member 430 to move to the released braking state. When in the locked position, the linkage rod 420 resets, and the brake member 430 can brake under the drive of the first elastic member 440. Through the above structure, a purely mechanical control of the brake switch can be achieved, and the structure is simple and highly reliable.

[0041] Reference Figures 5 to 8 In some embodiments of this utility model, the linkage rod 420 is further provided with a first limiting part 426. The first limiting part 426 is located between the pivot part 425 and the operating member 410. The switch assembly 300 includes a button 310. The button 310 has a second limiting part 311. The button 310 has a pressed state and a released state. In the released state, when the operating member 410 moves to the locked position, the first limiting part 426 can abut against the second limiting part 311 to restrict the button 310 from moving to the pressed state. Specifically, the linkage rod 420 may be provided with a protruding first limiting part 426, and the button 310 may be located on the side of the linkage rod 420 where the first limiting part 426 is provided. The button 310 has a second limiting part 311 protruding toward the linkage rod 420. In the locked position, the first limiting part 426 can move toward the button 310 and abut against the second limiting part 311, so that the button 310 cannot be pressed to open. In the unlocked position, the first limiting part 426 moves away from the button 310, so that the first limiting part 426 and the second limiting part 311 disengage, so that the button 310 can be pressed. After the button 310 is pressed, it can restrict the linkage rod 420 from resetting, thereby restricting the operating member 410 from resetting to the locked position to avoid conflict between the brake and the saw body starting.

[0042] It is understandable that the first limiting part 426 and the second limiting part 311 can also be set as other limiting structures, such as a buckle and a slot mating structure.

[0043] Reference Figures 3 to 8In some embodiments of this utility model, the braking component 430 includes a transmission frame 431 and a brake pad 432. One end of the transmission frame 431 is pivotally connected to the base 100, and the other end is provided with a first hook 4311. The linkage rod 420 is provided with a second hook 421. The brake pad 432 is installed on the side of the transmission frame 431 near the brake disc 211. One end of the first elastic member 440 is connected to the side of the brake pad 432 away from the brake disc 211, and the other end is connected to the base 100. When the operating member 410 moves to the unlocked position, the second hook 421 can cooperate with the first hook 4311 and drive the transmission frame 431 to rotate in a direction away from the brake disc 211. Specifically, refer to Figure 11 The brake pad 432 is detachably mounted on the transmission frame 431, which has a corresponding mounting groove. After the brake pad 432 is inserted into the mounting groove, it can be fixed by the pin 433. The transmission frame 431 can be pivotally connected to the base 100 to achieve swinging. When the linkage rod 420 rotates, the second hook 421 can swing and hook the first hook 4311, thereby driving the transmission frame 431 to swing away from the brake disc 211. When braking, the second hook 421 returns to its original position, and the transmission frame 431 can swing towards the brake disc 211.

[0044] Reference Figures 3 to 8 In some embodiments of this utility model, the outer peripheral wall of the brake disc 211 is designated as the brake surface 2111, and the brake disc 211 has an annular groove 2112 facing the lateral opening, allowing the brake pad 432 to abut against the brake surface 2111 for braking. Specifically, the brake disc 211 can be configured as a circular disc structure with the outer peripheral wall as the brake surface 2111. The brake pad 432 can press against the brake surface 2111 for braking, resulting in better radial braking effect. The annular groove 2112 can increase heat dissipation space and improve heat dissipation effect.

[0045] Reference Figures 1 to 4In some embodiments of this utility model, the base 100 includes a fixed base 110 and a grip base 120. The grip base 120 is rotatably connected to the fixed base 110. The saw body assembly, the switch assembly 300, and the safety locking mechanism are all disposed on the grip base 120. The safety locking mechanism also includes a locking pin 450 that is drivenly connected to the linkage mechanism. The grip base 120 can rotate to the working position and the retracted position. The fixed base 110 is provided with a locking hole 111. When the grip base 120 rotates to the retracted position, the locking hole 111 can be aligned with the locking pin 450. When the operating member 410 moves to the locked position, the locking pin 450 can be inserted into the locking hole 111. When the operating member 410 moves to the unlocked position, the locking pin 450 can disengage from the locking hole 111. Specifically, the chainsaw in this embodiment can be a rail saw. The fixed base 110 is used to cooperate with the rail, and the grip 120 can rotate relative to the fixed base 110 to release or retract the saw. In the working position, the saw blade 220 can be lowered for cutting, and in the retracted position, the saw blade 220 can be retracted into the protective shell of the fixed base 110 to ensure safe use. In the retracted position, the operating member 410 can simultaneously control the locking pin 450 to engage with the locking hole 111, so that the grip 120 is locked in the retracted position. Similarly, when the operating member 410 moves to the unlocked position, it can simultaneously drive the locking pin 450 to disengage from the locking hole 111, so that the grip 120 can move to the working position.

[0046] With the above structure, the operating element 410 and the linkage rod 420 can simultaneously control the braking and the retraction and extension of the grip 120, which is quite ingenious.

[0047] Reference Figures 5 to 10In some embodiments of this utility model, the linkage rod 420 is provided with a transmission part 422, the transmission part 422 is provided with a through hole 423 for the locking pin 450 to pass through, and the transmission part 422 is provided with a transmission inclined surface 424 on the side away from the locking hole 111. The locking pin 450 is provided with a transmission boss 451 that abuts against the transmission inclined surface 424. A second elastic member 452 is provided between the transmission boss 451 and the base 100. When the transmission inclined surface 424 is switched from the locked position to the unlocked position, the rotation direction of the linkage rod 420 is inclined toward the locking hole 111. Specifically, the second elastic element 452 can be a spring. When the operating member 410 slides to drive the linkage rod 420 to rotate, the transmission part 422 can swing around the pivot part 425. The through hole 423 can be an arc-shaped waist-shaped hole. The locking pin 450 passes through the through hole 423 and can be slidably connected to the base 100. When the operating member 410 slides to the locked position, the transmission ramp 424 can guide the locking pin 450 to extend, and the second elastic element 452 drives the locking pin 450 to slide out and insert into the locking hole 111 to lock. When the operating member 410 slides to the unlocked position, the transmission ramp 424 can guide the locking pin 450 to retract and compress the second elastic element 452, so that the locking pin 450 can exit the locking hole 111 to unlock. The locking and unlocking of the locking pin 450 can be realized through the cooperation of the transmission ramp 424 and the second elastic element 452. Furthermore, the above structure can be linked simultaneously with the braking member 430.

[0048] Reference Figures 1 to 4 In some embodiments of this utility model, the grip base 120 is provided with a handle 121, an operating member 410 is provided on the outside of the handle 121, and a switch assembly 300 is provided on the inside of the handle 121. Specifically, the user can grip the handle 121, the switch assembly 300 on the inside of the handle 121 can be pressed by the user's fingers, and the operating member 410 on the outside of the handle 121 can be pushed by the user's thumb, which facilitates operation.

[0049] Reference Figure 4 In some embodiments of this utility model, the fixed base 110 is further provided with a clearance hole 112. When the grip 120 is in the position between the working position and the retracted position, the clearance hole 112 can be opposite to the locking pin 450. When the operating member 410 moves to the locking position, the locking pin 450 can be inserted into the clearance hole 112. Specifically, when the grip 120 moves to the position between the working position and the retracted position, the locking hole 111 and the locking pin 450 are not yet aligned, and the braking member 430 cannot be activated. By providing the clearance hole 112, when the grip 120 is in the above position, the locking pin 450 can be temporarily inserted into the clearance hole 112, and the braking member 430 can be activated first to stop the saw blade 220, ensuring safety. Being able to brake first and then retract the grip 120 can further improve the safety of use.

[0050] Reference Figure 4 In some embodiments of this utility model, the clearance hole 112 extends along the rotation direction of the grip 120 and is spaced apart from the locking hole 111. Specifically, the clearance hole 112 can extend along the movement track of the locking pin 450 when the grip 120 rotates and is spaced apart from the locking hole 111. When the locking pin 450 engages with the locking hole 111 for locking, it is easy to confirm whether the grip 120 has rotated to the retracted position.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric circular saw with a braking structure, characterized in that, include: Base (100); A saw body assembly is provided on the base (100). The saw body assembly includes a drive component (210) and a saw blade (220). The saw blade (220) is connected to the drive component (210) in a transmission manner. The drive component (210) can drive the saw blade (220) to rotate. A switch assembly (300) is movably connected to the base (100) and connected to the drive component (210), the switch assembly (300) being able to control the drive component (210) to switch; The safety locking mechanism includes an operating component (410), a linkage mechanism, a braking component (430), and a first elastic component (440). The operating component (410) is movably connected to the base (100) and can move to a locked position and an unlocked position. The driving component (210) is provided with a brake disc (211). The first elastic component (440) is provided between the braking component (430) and the base (100). The linkage mechanism is respectively connected to the operating component (410) and the braking component (430). When the operating component (410) moves to the unlocked position, the linkage mechanism can drive the braking component (430) away from the brake disc (211) and compress the first elastic component (440). When the operating component (410) moves to the locked position, the first elastic component (440) can drive the braking component (430) to abut against the brake disc (211) for braking. When the operating member (410) moves to the unlock position, the switch assembly (300) can move. When the operating member (410) moves to the lock position, the operating member (410) or the linkage mechanism can abut against the switch assembly (300) to restrict the movement of the switch assembly (300).

2. The electric circular saw with a braking structure according to claim 1, characterized in that, The operating component (410) is slidably connected to the base (100). The linkage mechanism includes a linkage rod (420). The linkage rod (420) has a pivot part (425) in the middle that is pivotally connected to the base (100). One end of the linkage rod (420) is throttle-connected to the operating component (410), and the other end is throttle-connected to the brake component (430). The operating component (410) can drive the linkage rod (420) to rotate around the pivot part (425).

3. The electric circular saw with a braking structure according to claim 2, characterized in that, The linkage rod (420) is also provided with a first limiting part (426), which is located between the pivot part (425) and the operating member (410). The switch assembly (300) includes a button (310), which has a second limiting part (311). The button (310) has a pressed state and a released state. In the released state, when the operating member (410) moves to the locked position, the first limiting part (426) can abut against the second limiting part (311) to restrict the button (310) from moving to the pressed state.

4. An electric circular saw with a braking structure according to claim 2, characterized in that, The braking component (430) includes a transmission frame (431) and a brake pad (432). One end of the transmission frame (431) is pivotally connected to the base (100), and the other end is provided with a first hook (4311). The linkage rod (420) is provided with a second hook (421). The brake pad (432) is installed on the side of the transmission frame (431) near the brake disc (211). One end of the first elastic member (440) is connected to the side of the brake pad (432) away from the brake disc (211), and the other end is connected to the base (100). When the operating component (410) moves to the unlock position, the second hook (421) can cooperate with the first hook (4311) and drive the transmission frame (431) to rotate in a direction away from the brake disc (211).

5. An electric circular saw with a braking structure according to claim 4, characterized in that, The outer peripheral wall of the brake disc (211) is provided as a brake surface (2111), and the brake disc (211) has an annular groove (2112) facing the lateral opening, and the brake pad (432) can abut against the brake surface (2111) for braking.

6. An electric circular saw with a braking structure according to claim 2, characterized in that, The base (100) includes a fixed base (110) and a grip (120). The grip (120) is rotatably connected to the fixed base (110). The saw body assembly, the switch assembly (300), and the safety locking mechanism are all located on the grip (120). The safety locking mechanism also includes a locking pin (450) that is drivenly connected to the linkage mechanism. The grip (120) can rotate to a working position and a retracted position. The fixed base (110) is provided with a locking hole (111). When the grip (120) rotates to the retracted position, the locking hole (111) can be aligned with the locking pin (450). When the operating member (410) moves to the locked position, the locking pin (450) can be inserted into the locking hole (111). When the operating member (410) moves to the unlocked position, the locking pin (450) can disengage from the locking hole (111).

7. An electric circular saw with a braking structure according to claim 6, characterized in that, The linkage rod (420) is provided with a transmission part (422), the transmission part (422) is provided with a through hole (423) through which the locking pin (450) passes, and the transmission part (422) is provided with a transmission inclined surface (424) on the side away from the locking hole (111). The locking pin (450) is provided with a transmission boss (451) that abuts against the transmission inclined surface (424). A second elastic element (452) is provided between the transmission boss (451) and the base (100). When the transmission inclined surface (424) is switched from the locking position to the unlocking position, it is inclined towards the locking hole (111) in the direction of rotation of the linkage rod (420).

8. An electric circular saw with a braking structure according to claim 6, characterized in that, The grip (120) is provided with a handle (121), the operating element (410) is located on the outside of the handle (121), and the switch assembly (300) is located on the inside of the handle (121).

9. An electric circular saw with a braking structure according to claim 6, characterized in that, The fixed base (110) is also provided with a clearance hole (112). When the grip (120) is in the position between the working position and the retracted position, the clearance hole (112) can be opposite to the locking pin (450). When the operating member (410) moves to the locking position, the locking pin (450) can be inserted into the clearance hole (112).

10. An electric circular saw with a braking structure according to claim 9, characterized in that, The clearance hole (112) extends along the rotation direction of the grip (120) and is spaced apart from the locking hole (111).

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