Cutting device

Abstract

A cutting device comprises a protective cover, a machine body, a driving mechanism, an output shaft and a cutting piece, a switch, a trigger and a linkage device are arranged in the machine body, and the linkage device comprises a push rod rotating around a first axis, a depth connecting rod in transmission connection with the push rod, a shaft lock connecting rod rotating around a second axis and a shaft lock piece matched with the output shaft. The cutting device has a pressing locking state and a pressing unlocking state; the shaft locking plate is provided with an output shaft unlocking position and an output shaft locking position; the trigger has a safe position and a use position. The shaft lock connecting rod is in transmission connection with the push rod and the shaft lock plate. In a first state before rotation, the shaft lock connecting rod meets the following conditions: the cutting device is in a pressing locking state, the shaft lock plate is in an output shaft unlocking position, and the trigger is in a safe position; and in a second state after rotation, the cutting device is in a pressing unlocking state, the shaft locking plate is in an output shaft locking position, and the trigger is in a safe position. Through the arrangement, operation is easy and convenient, the two hands are liberated, and the cutting piece can be replaced more safely.

Description

[Technical field]

[0001] The present application relates to the technical field of electric tools, and in particular to a cutting device which is easy to use and can safely replace cutting pieces. [Background Technology]

[0002] A cutting device is provided in the related art. When replacing the cutting piece, the user needs to press the shaft lock piece by hand, which causes inconvenience in operation and affects the safety when replacing the cutting piece. [Summary of the invention]

[0003] The present application provides a cutting device to solve the problem of how to facilitate the replacement of cutting pieces and thus improve safety.

[0004] An embodiment of the present application provides a cutting device, including a shield, a body pivotally connected to the shield, a driving mechanism disposed in the body, and a cutting piece connected to the output shaft of the driving mechanism. A switch electrically connected to the driving mechanism and a trigger for triggering or releasing the switch are disposed in the body.

[0005] The cutting device also includes a linkage device arranged on the machine body, the linkage device includes a push rod rotating around a first axis, a depth connecting rod drivingly connected to the push rod, an axis locking connecting rod rotating around a second axis and an axis locking plate cooperating with the output shaft;

[0006] The cutting device has a downward pressing locking state that prevents the body from pressing downward relative to the shield, and a downward pressing unlocking state that allows the body to press downward relative to the shield; the shield is provided with a depth adjustment part; the push rod rotates to drive the depth connecting rod to abut against the depth adjustment part, so that the cutting device is in the downward pressing locking state, or the push rod rotates to drive the depth connecting rod not to abut against the depth adjustment part, so that the cutting device is in the downward pressing unlocking state;

[0007] The shaft locking piece has an output shaft unlocking position for allowing the output shaft to rotate, and an output shaft locking position for preventing the output shaft from rotating; the shaft locking piece moves and abuts against the output shaft to limit the rotation of the cutting member;

[0008] The trigger has a safety position that prevents the switch from being actuated, and a use position that allows the switch to be actuated;

[0009] At least a portion of the axis lock connecting rod is exposed from the fuselage, and the axis lock connecting rod is respectively connected to the push rod and the axis lock plate in a transmission manner. The axis lock connecting rod has a first state and a second state before and after rotation. In the first state, the following conditions are satisfied at the same time: the cutting device is in a pressed down locked state, the axis lock plate is in an output shaft unlocked position, and the trigger is in a safe position. In the second state, the following conditions are satisfied at the same time: the cutting device is in a pressed down unlocked state, the axis lock plate is in an output shaft locked position, and the trigger is in a safe position.

[0010] The above-mentioned cutting device, when the cutting piece needs to be replaced, can realize multiple functions respectively by rotating the shaft locking link: making the depth connecting rod enter the depth adjustment groove to switch the body to the downward-pressed unlocking state, and making the shaft locking plate lock the output shaft, and preventing the trigger from triggering the switch. Therefore, when replacing the cutting piece, the user does not need to press the shaft locking plate and other operations, thereby freeing the user's hands and facilitating the removal or installation of the cutting piece with both hands (such as loosening or tightening the fasteners that lock the cutting piece), thereby improving the safety of the cutting piece replacement process.

[0011] In one of the embodiments, a limiting hole is provided on the shield; the linkage device also includes a stop pin transmission-connected to the shaft lock link, the stop pin having a first end and a second end opposite to each other, the first end being arranged in the fuselage, and the second end extending into or out of the limiting hole; in a first state, the shaft lock link abuts against the first end to prevent the second end from extending into the limiting hole; in a second state, the shaft lock link leaves the first end to allow the second end to extend into the limiting hole.

[0012] In one of the embodiments, the shaft lock connecting rod and the stop pin are connected in transmission via an inclined wedge structure; the linkage device also includes a stop pin reset spring that abuts between the fuselage and the stop pin, and the stop pin reset spring applies an elastic force on the stop pin toward the limiting hole.

[0013] In one embodiment, a locking hole is provided on the trigger; the linkage device also includes a locking block transmission-connected to the shaft lock link, and when the shaft lock link rotates to the second state, the locking block moves relative to the trigger driven by the shaft lock link to engage in the locking hole.

[0014] In one of the embodiments, the linkage device further comprises a locking block return spring, which abuts between the fuselage and the locking block to apply an elastic force to the locking block toward a side away from the trigger.

[0015] In one embodiment, the depth link rotates around a third axis, one end of the depth link located on the third axis is connected to the push rod, and the other end of the depth link located on the third axis abuts or disengages from the depth adjustment portion, and the third axis is arranged non-parallel to the first axis.

[0016] In one of the embodiments, the shaft lock link includes a first rotating arm and a second rotating arm respectively located on both sides of the second axis, and an operating part arranged on the second rotating arm; the first rotating arm is used to respectively transmit and connect to the push rod, the shaft lock plate and the trigger; in the first state, the first rotating arm and the second rotating arm are respectively accommodated in the fuselage, and the operating part is exposed from the fuselage; in the second state, the first rotating arm is located in the fuselage, and the second rotating arm protrudes from the outside of the fuselage.

[0017] In one of the embodiments, an end of the first rotating arm away from the second rotating arm is provided with an arc-shaped arc surface portion, and the arc surface portion is used for sliding connection to the shaft locking plate and the push rod respectively.

[0018] In one of the embodiments, the linkage device also includes a shaft locking plate reset spring that abuts between the fuselage and the shaft locking plate; one end of the shaft locking plate abuts against the arc surface portion, and the other end of the shaft locking plate is provided with a locking hole; in the first state, the shaft locking plate reset spring is compressed; in the second state, the shaft locking plate reset spring is released to engage the locking hole and lock the output shaft.

[0019] In one embodiment, when the axis lock link is in the first state, the push rod can rotate around the first axis to put the trigger in the use position and drive the depth link to disengage from the depth adjustment part, or put the trigger in the safety position and drive the depth link to abut the depth adjustment part. [Drawings]

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic structural diagram of a cutting device in one embodiment of the present application.

[0022] Figure 2 for Figure 1 A schematic diagram of a portion of the structure of the cutting device in the illustrated embodiment in a pressed-down locked state.

[0023] Figure 3 for Figure 1 A schematic structural diagram of the cutting device in the illustrated embodiment from another perspective in a pressed-down locked state.

[0024] Figure 4 for Figure 1 A schematic diagram of the partial structure of the cutting device in the illustrated embodiment in a pressed-down unlocked state.

[0025] Figure 5 for Figure 1 A schematic diagram of the partial structure of the cutting device in the illustrated embodiment from another perspective in a pressed-down unlocked state.

[0026] Figure 6 for Figure 1 A schematic diagram of a portion of the structure of the cutting device in the illustrated embodiment when the shaft locking piece is in the output shaft unlocking position.

[0027] Figure 7 for Figure 1 The cutting device in the illustrated embodiment is a partial structural schematic diagram when the shaft locking piece is in the output shaft locking position, and at this time the machine body is pressed down to the cutting piece replacement position.

[0028] Figure 8 for Figure 1 A schematic diagram of a portion of the structure of the cutting device in the illustrated embodiment when the trigger is in the use position.

[0029] Fig. 9 for Figure 1 A schematic diagram of a portion of the structure of the cutting device in the illustrated embodiment when the trigger is in the safe position.

[0030] Fig.10 for Figure 1 A schematic diagram of the cutting device in the illustrated embodiment when the shaft locking link is in the first state.

[0031] Fig.11 for Figure 1 A schematic diagram of the cutting device in the illustrated embodiment when the shaft lock link is in the second state.

[0032] Fig.12 for Figure 1 Schematic diagram of the assembly state of the stop pin and the stop pin return spring in the illustrated embodiment.

[0033] Fig.13 for Figure 1 A schematic structural diagram of the shaft lock connecting rod in the illustrated embodiment.

[0034] Description of main component symbols:

[0035] Shield-10; cutting device-100; depth adjustment slot-11; first slot-111; second slot-112; limit hole-12; body-20; output shaft-30; cutting member-40; switch-50; trigger-60; trigger return spring-600; locking hole-61; linkage device-70; push rod-71; push rod return spring-710; shaft lock connecting rod-72; first contact part-721; first rotating arm-722; arc surface-7 221; second rotating arm-723; operating part-7231; shaft locking plate-73; shaft locking plate reset spring-730; first hole-731; second hole-732; depth connecting rod-74; stop pin-75; first end-751; second end-752; protrusion-753; inclined surface-7531; stop pin reset spring-76; locking block-77; locking block reset spring-78; first axis-a; second axis-b; third axis-c. [Specific implementation method]

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be a centered element. When an element is considered to be "set on" another element, it may be directly set on the other element or there may also be a centered element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present application. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0039] Some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features of the embodiments can be combined with each other.

[0040] Figure 1 is a schematic structural diagram of a cutting device 100 in an embodiment of the present application; Figure 2 for Figure 1 A schematic diagram of a portion of the structure of the cutting device 100 in the illustrated embodiment in a pressed down locked state; Figure 3 for Figure 1 A schematic structural diagram of the cutting device 100 in the illustrated embodiment in another perspective in a pressed down locked state; Figure 4 for Figure 1 A schematic diagram of a portion of the structure of the cutting device 100 in the illustrated embodiment in a pressed-down unlocked state; Figure 5 for Figure 1 A schematic diagram of a portion of the structure of the cutting device 100 in the illustrated embodiment in another perspective in a pressed-down unlocked state; Figure 6 for Figure 1 A schematic diagram of a portion of the structure of the cutting device 100 in the illustrated embodiment when the shaft locking piece 73 is in the output shaft unlocking position; Figure 7 for Figure 1 A schematic diagram of a portion of the structure of the cutting device 100 in the illustrated embodiment when the shaft locking piece 73 is in the output shaft locking position, at which time the body 20 is pressed down to the cutting piece replacement position; Figure 8 for Figure 1 A schematic diagram of a portion of the structure of the cutting device 100 in the illustrated embodiment when the trigger 60 is in the use position; Fig. 9 for Figure 1 A schematic diagram of a portion of the structure of the cutting device 100 in the illustrated embodiment when the trigger 60 is in a safe position; Fig.10 for Figure 1 A schematic diagram of the cutting device 100 in the illustrated embodiment when the shaft lock link 72 is in the first state; Fig.11 for Figure 1 The cutting device 100 in the illustrated embodiment is a schematic diagram when the shaft lock link 72 is in the second state.

[0041] See also Figure 1 and Figure 2 The present embodiment provides a cutting device 100, which is shown in the form of a track saw. The cutting device 100 includes a shield 10, a body 20 pivotally connected to the shield 10, a driving mechanism (not shown) disposed in the body 20, and a cutting member 40 connected to an output shaft 30 of the driving mechanism. A switch 50 electrically connected to the driving mechanism and a trigger 60 for triggering or releasing the switch 50 are disposed in the body 20. A bottom plate (not shown) for sliding on a track or a workpiece is also fixedly connected to the lower side of the shield 10.

[0042] The cutting device 100 further includes a linkage device 70, which includes a push rod 71, an axis locking link 72, an axis locking plate 73 and a depth link 74. Figure 2 and Figure 3 As shown, a depth adjustment slot 11 is provided on the shield 10 , and a depth connecting rod 74 is drivingly connected to the push rod 71 .

[0043] The cutting device 100 has a push-down unlocking state that allows the body 20 to be pushed down relative to the shield 10 , and a push-down locking state that prevents the body 20 from being pushed down relative to the shield 10 .

[0044] A depth adjustment groove 11 is provided on the side of the shield 10. The depth adjustment groove 11 includes a first groove 111 and a second groove 112 which are connected to each other. The second groove 112 is a longer arc groove, and the first groove 111 is a shorter straight groove. The lower side wall of the first groove 111 is a depth adjustment portion for abutting and limiting the depth connecting rod 74. Specifically, Figure 2 and Figure 3 As shown, in the pressed-down locking state, the depth link 74 is located in the first groove 111 of the depth adjustment groove 11, and the depth link 74 abuts against the depth adjustment portion. Figure 4 and Figure 5As shown, in the push-down unlocking state, the depth link 74 moves out of the first groove 111, that is, the depth link 74 is separated from the depth adjustment portion, and is located at the upper end of the second groove 112, and the user can press the body 20. The push rod 71 can rotate relative to the body 20 around the first axis a to drive the depth link 74 to enter the first groove 111, or move out of the first groove 111, so as to switch between the push-down unlocking state and the push-down locking state. In another embodiment of the present invention, the depth adjustment portion can be a protrusion provided on the side of the shield 10. In another embodiment of the present invention, since the second groove 112 is provided to guide the downward pressing of the body 20, the second groove 112 can be omitted and only the first groove 111 can be provided.

[0045] In some embodiments, Figure 2 and Figure 3 As shown, the depth link 74 can rotate around the third axis c to enter the first slot 111 or move out of the first slot 111. The third axis c is arranged non-parallel to the first axis a. In another embodiment, the depth link 74 is integrally arranged at the end of the push rod 71 to reduce the number of parts. Preferably, a push rod reset spring 710 for reset is provided on the side of the push rod 71 away from the trigger 60.

[0046] like Figure 6 As shown, the shaft lock plate 73 has an output shaft unlocking position that allows the output shaft 30 to rotate, and an output shaft locking position that prevents the output shaft 30 from rotating (see FIG. Figure 7 ), the shaft locking plate 73 can move relative to the fuselage 20 to switch between an output shaft locking position and an output shaft unlocking position.

[0047] like Figure 8 As shown, the trigger 60 has a use position that allows the switch 50 to be triggered, and a safety position that prevents the switch 50 from being triggered (see FIG. Fig. 9 ).

[0048] like Fig.10 and Fig.11 As shown, Fig.10 is a schematic diagram of the cutting device 100 when the shaft lock link 72 is in the first state, Fig.11 Schematic diagram of the cutting device 100 when the shaft lock link 72 is in the second state; the first state is the initial state of the cutting device 100, and the second state is the state in which the user replaces the cutting member 40. The shaft lock link 72 is respectively connected to the push rod 71 and the shaft lock plate 73, and the shaft lock link 72 can rotate around the second axis b, and drive the push rod 71 to switch between the downward locking state and the downward unlocking state, and drive the shaft lock plate 73 to switch between the output shaft unlocking position and the output shaft locking position. At least part of the shaft lock link 72 is exposed from the body 20.

[0049] When the shaft lock link 72 is in the first state, the Figure 2 and Figure 3 As shown, the depth link 74 is located in the first groove 111, and the cutting device 100 is in a pressed down locked state, that is, the cutting depth of the cutting member 40 cannot be adjusted; Figure 6 As shown, the shaft lock piece 73 is located in the output shaft unlocking position, thereby allowing the drive mechanism to start; Figure 8 As shown, the trigger 60 is in the use position, that is, the trigger 60 is not locked by the shaft lock link 72.

[0050] Please combine Figure 4 , Figure 5 , Figure 7 , Fig. 9 and Fig.11 When the cutting member 40 needs to be replaced, the shaft lock link 72 is operated to rotate around the second axis b, so that the shaft lock link 72 switches from the first state to the second state. At this time, the trigger 60 is prevented from triggering the switch 50 by the shaft lock link 72, and the shaft lock link 72 drives the push rod 71 to rotate, thereby driving the depth link 74 to leave the first groove 111 through the push rod 71, so that the cutting device 100 switches to the downward unlocking state, that is, the body 20 is allowed to pivot relative to the shield 10, thereby driving the cutting member 40 to pivot to a position that is convenient for replacing the cutting member 40. At the same time, the shaft lock link 72 also drives the shaft lock plate 73 to rotate, so that the shaft lock plate 73 switches to the output shaft locking position, thereby preventing the drive mechanism from starting.

[0051] Therefore, when the cutting piece 40 needs to be replaced, multiple functions can be achieved respectively by rotating the shaft lock link 72, namely, the body 20 is unlocked, the output shaft 30 is locked, and the trigger 60 is locked. Then, when replacing the cutting piece 40, the user does not need to press the shaft lock plate 73 and other operations, thereby truly freeing the user's hands and facilitating the removal or installation of the cutting piece 40 with both hands (for example, loosening or tightening the fasteners that lock the cutting piece 40), thereby improving the safety of the cutting piece 40 replacement process.

[0052] Fig.12 for Figure 1 Schematic diagram of the assembly state of the stop pin 75 and the stop pin return spring 76 in the illustrated embodiment.

[0053] In some embodiments, Figure 6 and Figure 7 As shown, the shield 10 is provided with a limit hole 12. The linkage device 70 also includes a stop pin 75, which is combined with Fig.12As shown, the stop pin 75 has a first end 751 and a second end 752 facing each other. The first end 751 is arranged in the body 20 and is transmission-connected to the shaft lock link 72. The second end 752 can extend into the limiting hole 12 to limit the body 20 relative to the shield 10 at the cutting piece replacement position in the pressed-down unlocking state, or the second end 752 can be located outside the limiting hole 12 to allow the body 20 to be pressed down relative to the shield 10 in the pressed-down unlocking state. Figure 6 As shown, in the first state, the shaft lock link 72 abuts against the stop pin 75 to prevent the second end 752 from extending into the limiting hole 12. Figure 7 As shown, in the second state, the shaft lock link 72 leaves the stop pin 75 to allow the stop pin 75 to extend into the limiting hole 12.

[0054] Thus, in the first state, the stop pin 75 is limited by the shaft lock link 72, preventing the stop pin 75 from falling into the limit hole 12. When the shaft lock link 72 rotates and switches from the first state to the second state, the shaft lock link 72 switches the depth link 74 to the downward-pressed unlocking state, and the shaft lock link 72 leaves the stop pin 75, thereby allowing the stop pin 75 to fall into the limit hole 12. It should be noted that in the downward-pressed unlocking state, when the stop pin 75 does not pivot to the position of the limit hole 12 with the body 20, the stop pin 75 is located outside the limit hole 12, and at this time, the body 20 can be operated to pivot relative to the shield 10, so that the body 20 pivots relative to the shield 10 to the cutting piece replacement position. Specifically, when the fuselage 20 pivots to the cutting piece replacement position, the stop pin 75 is driven by the fuselage 20 to pivot to the position of the limiting hole 12. At this time, since the stop pin 75 is not limited by the shaft lock link 72, the stop pin 75 can extend into the limiting hole 12, so that the fuselage 20 is locked relative to the shield 10, so as to facilitate the cutting piece replacement position to replace the cutting piece 40. It should be noted that in the cutting piece replacement position, the cutting piece 40 can be removed from the fuselage 20, and the cutting piece 40 can be installed on the fuselage 20.

[0055] In some embodiments, Figure 6 and Figure 7As shown, the linkage device 70 further includes a stop pin reset spring 76, which abuts between the body 20 and the stop pin 75 to apply an elastic force to the stop pin 75 toward the limiting hole 12. In this way, since the shaft lock link 72 leaves the stop pin 75 in the cutting piece replacement mode, when the stop pin 75 pivots to the position of the limiting hole 12 along with the body 20, the stop pin 75 falls into the limiting hole 12 under the elastic force of the stop pin reset spring 76, and is elastically limited in the limiting hole 12 by the stop pin reset spring 76. When the shaft lock link 72 switches from the second state to the first state, the shaft lock link 72 overcomes the elastic force of the stop pin reset spring 76 and lifts the stop pin 75 away from the limiting hole 12, so that the stop pin 75 moves out of the limiting hole 12, and the locking of the position of the body 20 is released.

[0056] Fig.13 for Figure 1 A schematic diagram of the structure of the shaft lock connecting rod 72 in the illustrated embodiment.

[0057] In some embodiments, Fig.12 and Fig.13 As shown, the shaft lock link 72 and the stop pin 75 are connected in transmission through an inclined wedge structure, so as to set the direction in which the stop pin 75 moves when the shaft lock link 72 rotates. Fig.12 As shown, the stop pin 75 is provided with a protrusion 753, and the protrusion 753 has an inclined surface 7531. Fig.13 As shown, the shaft lock link 72 is provided with a first contact portion 721, and the first contact portion 721 is used to cooperate with the inclined surface 7531. The stop pin return spring 76 is away from the fuselage 20 (see Figure 7 ) contacts the protruding portion 753.

[0058] In some embodiments, Figure 8 and Fig. 9 As shown, the trigger 60 is provided with a locking hole 61. The linkage device 70 also includes a locking block 77, which is transmission-connected to the shaft lock link 72. When the shaft lock link 72 rotates around the second axis b, the locking block 77 can be driven by the shaft lock link 72 to move relative to the fuselage 20 (see Figure 7 ) to snap into the locking hole 61 or leave the trigger 60, thereby switching between the safety position and the use position. In this way, the shaft lock link 72 unlocks or locks the trigger 60 through the locking block 77, which helps to simplify the structure of the shaft lock link 72. In other embodiments, the shaft lock link 72 can be directly snapped into the locking hole 61 by providing a special-shaped structure, so that the locking block 77 is not required.

[0059] In some embodiments, Figure 8 and Fig. 9As shown, the linkage device 70 also includes a locking block return spring 78, which abuts against the fuselage 20 (see Figure 7 ) and the locking block 77 to apply an elastic force to the locking block 77 away from the trigger 60. In this way, when the shaft lock link 72 switches from the first state to the second state, the shaft lock link 72 overcomes the elastic force of the locking block return spring 78 and pushes the locking block 77 to fit into the locking hole 61. When the shaft lock link 72 switches to the first state and leaves the locking block 77, the locking block 77 moves away from the trigger 60 under the elastic force of the locking block return spring 78, so that the trigger 60 automatically switches to the use position.

[0060] Preferably, the trigger 60 is a rotating trigger, that is, the trigger 60 can rotate relative to the fuselage 20, and the trigger 60 is reset by the trigger reset spring 600. In other embodiments, the trigger 60 is a sliding trigger, that is, the trigger 60 can move relative to the fuselage 20 to switch between the use position and the safety position.

[0061] In some embodiments, Fig.13 As shown, the shaft lock link 72 includes a first rotating arm 722 and a second rotating arm 723 located on both sides of the second axis b, and an operating portion 7231 disposed on the second rotating arm 723. Fig.10 and Fig.11 As shown, the first rotating arm 722 is used to be respectively connected to the push rod 71, the shaft locking plate 73 and the trigger 60. Figure 1 As shown, in the use position, the first rotating arm 722 and the second rotating arm 723 are respectively accommodated in the body 20, and the operating portion 7231 is exposed from the body 20. In the safe position, the first rotating arm 722 is located in the body 20, and the second rotating arm 723 protrudes from the body 20. In this way, when the cutting member 40 needs to be replaced, the operating portion 7231 is moved toward the outside of the body 20 to drive the shaft lock link 72 to rotate, thereby facilitating operation and distinguishing the first position and the second position of the shaft lock link 72. Optionally, the first rotating arm 722 is connected to the trigger 60 through a locking block 77.

[0062] In some embodiments, Fig.13 As shown, an arc surface portion 7221 is provided at one end of the first rotating arm 722 away from the second rotating arm 723, and the arc surface portion 7221 is used to be respectively connected to the push rod 71, the shaft locking piece 73 and the trigger 60. In this way, the arc surface portion 7221 is provided to slidably contact the push rod 71, the shaft locking piece 73 and the trigger 60 (or the locking block 77), so that the transmission is smoother when the first rotating arm 722 pushes the push rod 71, the shaft locking piece 73 or the trigger 60, and it is beneficial to reduce structural wear.

[0063] The linkage device 70 further includes a shaft locking piece reset spring 730 abutting between the body 20 and the shaft locking piece 73; one end of the shaft locking piece 73 abuts against the arc surface 7221, and the other end of the shaft locking piece 73 is provided with a locking hole, i.e., a second hole 732; in the first state, the shaft locking piece reset spring 730 is compressed; in the second state, the shaft locking piece reset spring 730 is released to engage the second hole 732 and lock the output shaft 30. Preferably, the shaft locking piece 73 is a metal plate formed by stamping and bending, and the shaft locking piece 73 is provided with a first hole 731 with a larger area and a second hole 732 with a smaller area, and the size of the second hole 732 is not less than the size of the output shaft 30, and the second hole 732 is used to lock the output shaft 30. In another embodiment, the shaft locking piece 73 can also be configured as a locking pin that can be radially inserted into the output shaft 30.

[0064] In some embodiments, Figure 6 As shown, when the axis lock link 72 is in the first state, the push rod 71 can be operated by the user to rotate around the first axis a, the trigger 60 can freely trigger the switch 50, and the push rod 71 drives the depth link 74 to move out of the first groove. In other words, when the axis lock link 72 is in the first state, the trigger 60 can be locked or unlocked by the push rod 71 alone; and when the axis lock link 72 is in the second state, the trigger 60 is locked by the axis lock link 72. And in the first state where the axis lock link 72 is not rotated, the trigger 60 and the body 20 can be unlocked by pushing the push rod 71 to rotate toward the side away from the trigger 60. At this time, the switch 50 can be triggered by operating the trigger 60 to perform cutting operations on the workpiece.

[0065] The cutting device 100 proposed in the present invention can realize multiple functions at the same time by rotating the shaft locking link 72 when the cutting piece 40 needs to be replaced: the depth link 74 is disengaged from the depth adjustment part to switch the body 20 to the pressed-down unlocked state, and the shaft locking plate 73 locks the output shaft 30 and prevents the trigger 60 from triggering the switch; when replacing the cutting piece 40, the user only needs to rotate the shaft locking link 72 from the first state to the second state, and then press the body 20 down to a certain position, and then let go without pressing the shaft locking plate 73 and other operations, which truly frees the user's hands and facilitates the subsequent disassembly or installation of the cutting piece 40 with both hands (such as loosening or tightening the fasteners that lock the cutting piece), thereby improving the safety of the cutting piece 40 replacement process.

[0066] The above implementation modes are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above preferred implementation modes, a person skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A cutting device, comprising a shield, a body pivotally connected to the shield, a driving mechanism disposed in the body, and a cutting member connected to an output shaft of the driving mechanism, wherein a switch electrically connected to the driving mechanism and a trigger for triggering or releasing the switch are disposed in the body; Features: The cutting device further comprises a linkage device arranged on the body, the linkage device comprising a push rod rotating around a first axis, a depth connecting rod drivingly connected to the push rod, an axis locking connecting rod rotating around a second axis and an axis locking plate cooperating with the output shaft; The cutting device has a downward pressing unlocking state allowing the body to be pressed downward relative to the shield, and a downward pressing locking state preventing the body from being pressed downward relative to the shield; a depth adjusting portion is provided on the shield; the push rod rotates to drive the depth connecting rod to abut against the depth adjusting portion, so that the cutting device is in the downward pressing locking state, or the push rod rotates to drive the depth connecting rod not to abut against the depth adjusting portion, so that the cutting device is in the downward pressing unlocking state; The shaft locking piece has an output shaft unlocking position that allows the output shaft to rotate, and an output shaft locking position that prevents the output shaft from rotating; the shaft locking piece moves and abuts against the output shaft to limit the rotation of the cutting member; The trigger has a use position that allows the switch to be actuated, and a safety position that prevents the switch from being actuated; At least a portion of the shaft lock link is exposed from the body, the shaft lock link is respectively connected to the push rod and the shaft lock plate, and the shaft lock link has a first state and a second state before and after rotation; in the first state, the cutting device is in the pressed locking state, the shaft lock plate is in the output shaft unlocking position, and the trigger is in the safety position; In the second state, it is simultaneously satisfied that: the cutting device is in the pressed-down unlocking state, the shaft locking piece is in the output shaft locking position, and the trigger is in the safety position.

2. The cutting device according to claim 1, characterized in that: The protective cover is provided with a limiting hole; The linkage device further comprises a stop pin which is transmission-connected to the shaft lock link, the stop pin having a first end and a second end which are opposite to each other, the first end being arranged in the fuselage, and the second end extending into or moving out of the limit hole; In the first state, the shaft lock link abuts against the first end to prevent the second end from extending into the limiting hole; in the second state, the shaft lock link leaves the first end to allow the second end to extend into the limiting hole.

3. The cutting device according to claim 2, characterized in that: The shaft lock connecting rod and the stop pin are connected in transmission via an inclined wedge structure; the linkage device also includes a stop pin reset spring that abuts between the fuselage and the stop pin, and the stop pin reset spring applies an elastic force to the stop pin toward the limiting hole.

4. The cutting device according to claim 1, characterized in that: The trigger is provided with a locking hole; The linkage device also includes a locking block drivingly connected to the shaft lock link. When the shaft lock link rotates to the second state, the locking block moves relative to the trigger driven by the shaft lock link to be engaged in the locking hole.

5. The cutting device according to claim 4, characterized in that: The linkage device also includes a locking block reset spring, which abuts between the body and the locking block to apply an elastic force to the locking block away from the trigger.

6. The cutting device according to claim 1, characterized in that: The depth link rotates around a third axis, one end of the depth link located on the third axis is connected to the push rod, the other end of the depth link located on the third axis abuts against or disengages from the depth adjustment portion, and the third axis is non-parallel to the first axis.

7. The cutting device according to claim 1, characterized in that: The shaft lock connecting rod comprises a first rotating arm and a second rotating arm located on both sides of the second axis, and an operating portion provided on the second rotating arm; the first rotating arm is used for respectively transmittingly connecting to the push rod, the shaft lock plate and the trigger; In the first state, the first rotating arm and the second rotating arm are respectively accommodated in the body, and the operating part is exposed from the body; in the second state, the first rotating arm is located in the body, and the second rotating arm protrudes from the body.

8. The cutting device according to claim 7, characterized in that: An arc-shaped curved surface portion is provided at one end of the first rotating arm away from the second rotating arm, and the curved surface portion is used for slidingly connecting to the shaft locking plate and the push rod respectively.

9. The cutting device according to claim 8, characterized in that: The linkage device also includes a shaft locking plate return spring that abuts between the fuselage and the shaft locking plate; one end of the shaft locking plate abuts against the arc surface portion, and the other end of the shaft locking plate is provided with a locking hole; in the first state, the shaft locking plate return spring is compressed; in the second state, the shaft locking plate return spring is released to engage the locking hole and lock the output shaft.

10. The cutting device according to claim 1, characterized in that: When the axis lock link is in the first state, the push rod can rotate around the first axis to place the trigger in the use position and drive the depth link to disengage from the depth adjustment portion, or to place the trigger in the safety position and drive the depth link to abut against the depth adjustment portion.

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