CN116406577A - Electric device and electric tool thereof - Google Patents

Abstract

The invention relates to the field of electric cutting tools and discloses an electric device and an electric tool thereof.

Description

Electric device and electric tool thereof

Technical Field

The invention relates to the field of electric cutting tools, in particular to an electric device and an electric tool thereof.

Background

The electric cutting tools may be classified into a pruner, a chain saw, etc., according to the object to be cut. Taking a pruning machine as an example, the pruning machine is a gardening tool for cutting branches, a shearing mechanism and a driving assembly are arranged in the pruning machine, two blades are stacked in the shearing mechanism, and the driving assembly drives the two blades to reciprocate mutually to realize cutting;

after the shearing mechanism stops working, the connecting part between the shearing mechanism and the driving assembly can be mutually clamped, so that the shearing mechanism is difficult to disassemble.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide an electric device and an electric tool thereof, which are used for overcoming the condition that the connecting part between a shearing mechanism and a driving assembly is blocked.

In order to achieve the above purpose, the present invention provides the following technical solutions: the electric device is suitable for being detachably connected to the shearing mechanism and comprises a machine body, a driving assembly and a fine adjustment assembly, wherein the driving assembly is arranged on the machine body and comprises a driving piece, the fine adjustment assembly is circumferentially meshed with the driving piece so as to drive the driving piece to circumferentially rotate, and the electric device rotates from a deflection position to a reset position.

As a further development of the invention, the drive member is provided with splines, which, when the drive member is held in the reset position, are in splined engagement with the transmission member of the shearing mechanism.

As a further improvement of the invention, the fine adjustment assembly comprises a triggering part and a connecting part, wherein the connecting part is connected with the driving piece in a transmission way, the triggering part is twisted after being pressed, and the connecting part is displaced by the triggering part in a driving way.

As a further improvement of the invention, the driving component further comprises a gear, the driving piece is driven by the gear, the fine adjustment component comprises a triggering part and a connecting part, the connecting part is meshed with the gear, and the triggering part drives the gear to circumferentially rotate through the connecting part, so that the driving piece is driven to circumferentially rotate.

As a further improvement of the invention, the driving assembly further comprises a gear, the driving member is driven by the gear, the gear is coaxially arranged on the driving member, and the driving member is coaxially rotated by the gear.

As a further development of the invention, the gear wheel is fixedly connected to the drive element.

As a further improvement of the invention, the connecting part comprises a rack and a push rod hinged with the end part of the rack, one side of the push rod is provided with a bulge to be meshed with the gear, and a first reset part is arranged between the push rod and the machine body and used for driving the push rod to reset.

As a further improvement of the invention, the first reset part is a first compression spring, a groove is formed in one side of the ejector rod, which is away from the bulge, and one end of the first compression spring extends into the groove.

As a further improvement of the invention, the fine adjustment assembly further comprises a frame body, a second reset part is arranged between the frame body and the rack and used for driving the rack to reset, and the trigger part is used for driving the rack to move.

As a further improvement of the invention, the triggering part comprises a knob and a gear ring, wherein the gear ring is meshed with the rack, and the knob is rotated so that the knob drives the rack to move through the gear ring.

As a further improvement of the invention, a shaft body is fixedly connected to the knob, one end of the shaft body penetrates through the frame body and is movably connected with the frame body, the gear ring is movably connected with the shaft body, a clamping block is arranged on the inner side of the knob, a clamping groove is formed in one side, facing the knob, of the gear ring, the clamping groove is matched with the clamping block, and a third reset part is arranged between the knob and the gear ring and used for driving the knob to reset.

As a further development of the invention, the trimming assembly is driven in a torsion-after-pressing manner.

The electric tool comprises the electric device and the shearing mechanism, wherein the shearing mechanism is detachably connected to a driving piece of the driving assembly, the shearing mechanism comprises at least one transmission piece, an eccentric member and at least two blades, the driving piece is in transmission connection with the transmission piece to drive the eccentric member, and the two blades are respectively in transmission connection with the eccentric member and reciprocate.

As a further development of the invention, the transmission element is integrally formed with the eccentric member.

As a further improvement of the invention, the shearing mechanism further comprises a shell, at least one buckling piece is arranged on the shell, an elastic piece is arranged between the buckling piece and the shell, and the buckling piece is connected with the machine body in a buckling manner.

The invention has the beneficial effects that: the fine adjustment assembly is arranged, so that the driving piece or the gear can be finely adjusted, the driving assembly and the shearing mechanism are prevented from being clamped, and the whole assembly and disassembly of the shearing assembly are facilitated;

2. the ejector rod is provided with the bulge, so that the bulge moves in one tooth slot of the gear, and the fine adjustment range is controlled;

3. the clamping piece is arranged on the shell, so that detachable connection is formed between the clamping piece and the machine body, the shell is convenient to disassemble and assemble, and the cutting assembly is convenient to disassemble and assemble;

4. the two clamping pieces are oppositely arranged, so that the installation stability and the firmness between the shell and the machine body are improved;

5. the setting of first portion that resets, second portion that resets and third portion that resets for ejector pin, rack and knob can reset, can finely tune at dismouting shear mechanism's in-process many times, in order to reach best dismouting effect.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a top view of the internal structure of the present invention;

FIG. 4 is an enlarged view of the invention at A in FIG. 2;

FIG. 5 is an enlarged view of the invention at B in FIG. 3;

FIG. 6 is a schematic view of the structure of the shearing mechanism of the present invention;

FIG. 7 is a schematic view of the internal structure of the shearing mechanism of the present invention;

FIG. 8 is a schematic view of the internal structure of the body of the present invention;

FIG. 9 is a schematic view of the structure of the present invention at a blade;

fig. 10 is a schematic view of the structure of the driving assembly of the present invention.

Reference numerals: 1. a body; 11. a power supply unit; 12. a housing; 1201. an operation bottom surface; 1202. a grip surface; 2. a drive assembly; 21. a driving member; 22. a gear; 23. a speed change gear set; 24. a motor; 3. a fine tuning assembly; 31. a trigger part; 311. a knob; 312. a gear ring; 313. a shaft body; 314. a clamping block; 315. a clamping groove; 316. a third reset unit; 32. a connection part; 321. a rack; 322. a push rod; 3221. a groove; 323. a protrusion; 324. a first reset section; 33. a frame body; 331. a second reset section; 4. a shearing mechanism; 41. a transmission member; 42. a housing; 421. a clip; 4211. a pressing part; 4212. a buckling part; 43. an eccentric member; 44. a blade; 5. and (5) caulking grooves.

Detailed Description

The invention will now be described in further detail with reference to the drawings and examples. Wherein like parts are designated by like reference numerals. It should be noted that the words "front", "back", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.

Referring to fig. 1 to 10, the electric device and the electric tool thereof according to the present embodiment include at least one electric device and a shearing mechanism detachably mounted on the electric device, the electric device includes a machine body 1, a driving assembly 2 and a fine adjustment assembly 3, the driving assembly 2 is disposed on the machine body 1, the driving assembly 2 includes a driving member 21, the driving assembly 2 further includes a motor 24 and a gear-changing set 23, the gear-changing set 23 is axially connected to the motor 24, and the gear-changing set 22 is driven by the motor 24 to drive the driving member 21 to rotate. Because the shearing mechanism 4 is in transmission connection with the driving piece 21 of the driving assembly 2, the driving piece 21 of the driving assembly 2 is in connection with the shearing mechanism 4 in a concave-convex limiting mode, the driving piece 21 of the driving assembly 2 is reset and then has a reset position, and when the driving piece 21 deflects to a deflection position relative to the reset position, the shearing mechanism 4 is not easy to clamp to the driving piece 21, so that the experience of a user in disassembling and assembling the blade is poor. By the circumferential engagement between the fine adjustment assembly 3 and the driving member 21, the driving member 21 is driven to rotate circumferentially, and rotate from the deflected position to the reset position, when the driving member 21 deflects from the reset position to the deflected position, the driving member 21 is adjusted circumferentially by the fine adjustment assembly 3 to be rotated to the reset position, and then the driving member 21 is smoothly engaged by the shearing mechanism 4, so that the shearing mechanism 4 is sheared by the electric device.

Preferably, the machine body 1 includes a power supply portion 11, a control module, and a housing 12, the power supply portion 11, the control module, and the driving component 2 are disposed on the housing 12, and a driving member 21 of the driving component 2 is exposed on the housing 12, so that the driving member 21 is detachably connected to the shearing mechanism 4, wherein the housing 12 has at least one operation bottom surface 1201 and a holding surface 1202 opposite to the operation bottom surface 1201, the driving member 21 is held on the operation bottom surface 1201 of the housing 12, a user holds on the housing 12 and looks at the holding surface 1202 of the housing 12, and the shearing mechanism 4 is assembled on the operation bottom surface 1201 of the housing 12.

It is worth mentioning that the shearing mechanism 4 comprises a transmission 41, an eccentric member 43 and at least two blades 44. Preferably, the driving piece 21 is in transmission connection with the transmission piece 41 to drive the eccentric member 43, the two blades 44 are respectively in transmission connection with the eccentric member 43 and reciprocate to realize cutting, and the fine adjustment assembly 3 is used for performing circumferential fine adjustment on the driving piece 21.

Preferably, the transmission 41 and the eccentric member 43 are integrally formed such that the driver 21 of the drive assembly 2 is drivingly connected to the transmission 41 to drive the eccentric member 43. The 2 blades 44 are respectively fitted to the driving part and the eccentric part of the eccentric member 43, and the 2 blades 44 are connected by the eccentric member 43 in a driving manner to be driven to reciprocate.

Each blade 44 has a blade edge such that the blade edge of the reciprocating blade 44 is snugly reciprocated to cut the root, stem and leaf of a plant held between the blades 44 as the blades 44 are held relatively. Alternatively, blade 44 may also be used to cut other objects, as the invention is not limited in any way herein.

The driving assembly 2 further comprises a gear 22, the driving piece 21 is driven by the gear 22, the fine adjustment assembly 3 comprises a triggering portion 31 and a connecting portion 32, the connecting portion 32 is meshed with the gear 22, and the triggering portion 31 drives the gear 22 to circumferentially rotate through the connecting portion 32, so that the driving piece 21 is driven to circumferentially rotate.

Preferably, the gear 22 is coaxially disposed on the driving member 21, and the driving member 21 is coaxially rotated by the gear 22.

More preferably, the gear 22 and the driving member 21 are integrally provided.

Referring to fig. 2 and 4, the gear 22 is fixedly connected to the driving element 21, the speed change gear set 23 is meshed with the gear 22, the driving element 21 is connected with the gear 22 through a key, a part of the gear 22 extends downwards out of the machine body 1, an external thread is arranged at an extending part of the gear, the gear is in spline connection with the eccentric member 43, the fine adjustment assembly 3 comprises a trigger part 31 and a connecting part 32, the connecting part 32 is meshed with the gear 22, the trigger part 31 is integrally connected with the driving element 21 of the gear 22 through the connecting part 32 in a circumferential fine adjustment manner, the gear 22 is directly subjected to fine adjustment, the fine adjustment is more stable, the fine adjustment range is controllable, an additional gear 22 can be preset on the driving element 21 to be connected with the fine adjustment assembly 3, and the influence of the occupied space of the speed change gear 22 set can be reduced.

It should be noted that the driving member 21 is provided with external splines, the transmission member 41 is provided with internal splines, the transmission member 41 is detachably engaged with the driving member 21, and the driving member 21 can be engaged with the transmission member 41 of the shearing mechanism 4 when the driving member 21 is held in the reset position.

Referring to fig. 2, 3, 4 and 5, the connecting portion 32 includes a rack 321 and a push rod 322 hinged to an end of the rack 321, a protrusion 323 is provided on one side of the push rod 322, the push rod 322 and the protrusion 323 are integrally formed, the protrusion 323 is in a tooth shape and is meshed with the gear 22, a first reset portion 324 is provided between the push rod 322 and the machine body 1 and is used for driving the push rod 322 to reset, the protrusion 323 includes a joint surface, when the protrusion 323 is meshed with the gear 22, the joint surface is jointed with one tooth surface on the gear 22, the protrusion 323 moves in one tooth groove of the gear 22, in the moving process of the rack 321, the push rod 322 drives the gear 22 to rotate by means of the joint surface, and at the moment, the push rod 322 rotates towards one side of the gear 22, the first compression spring is compressed, and a joint range between the joint surface and the tooth surface is gradually reduced, so that fine adjustment is realized.

Referring to fig. 2 and 4, the first restoring portion 324 is a first compression spring, a groove 3221 is formed on one side of the ejector rod 322 facing away from the protrusion 323, one end of the first compression spring extends into the groove 3221, the groove 3221 is in a circular groove shape, the first compression spring is prevented from being shifted, one end of the first compression spring abuts against the inner wall of the groove 3221, the other end of the first compression spring abuts against the inner wall of the machine body 1, and the first compression spring and the third compression spring are arranged in parallel.

Referring to fig. 2, fig. 3, fig. 4 and fig. 5, the fine tuning assembly 3 is driven in a manner of being twisted after being pressed, the fine tuning assembly 3 further comprises a frame 33, the frame 33 is in a vertical state and is perpendicular to the bottom of the machine body 1, two threaded holes are formed in the frame 33, two bolts penetrate through the corresponding threaded holes and are fixedly connected with the machine body 1, a height position difference exists between the two threaded holes, in order to prevent interference with the gear 22, the installation is convenient, a second reset part 331 is arranged between the frame 33 and the rack 321 and is used for driving the rack 321 to reset, the triggering part 31 is used for driving the rack 321 to move, the second reset part 331 is a second compression spring, a strut is fixedly connected to the rack 321, the second compression spring is sleeved on the strut and is prevented from position deviation of the second compression spring, one end of the second compression spring abuts against the rack 321, the other end abuts against the frame 33, and the length direction of the second compression spring is perpendicular to the length direction of the first compression spring. The triggering part 31 comprises a knob 311 and a gear ring 312, a through hole is formed in the machine body 1, a part of the knob 311 extends out of the through hole, so that a user can press the knob 311, the gear ring 312 is meshed with the rack 321, and the knob 311 is rotated, so that the knob 311 drives the rack 321 to move through the gear ring 312.

Further, when the trigger 31 is pressed, the ring gear 312 is engaged with the rack 321, and when the trigger 31 is twisted, the rack 321 is moved.

Referring to fig. 3 and 5, the knob 311 is fixedly connected with a shaft body 313, the shaft body 313 is cylindrical, one end of the shaft body 313 penetrates through the frame body 33, a movable hole is formed in the frame body 33, one end of the shaft body 313 penetrates through the movable hole, the inner diameter of the movable hole is equal to the outer diameter of the shaft body 313, the shaft body 313 is prevented from shaking, the shaft body 33 is movably connected with the gear ring 312, the inner side of the knob 311 is provided with a clamping block 314, the clamping block 314 is uniformly arranged along the circumference of the knob 311, one side of the gear ring 312, which faces the knob 311, is provided with a clamping groove 315, the clamping groove 315 is uniformly arranged along the circumference of the gear ring 312, the clamping groove 315 is matched with the clamping block 314, the clamping block 314 comprises a top surface, a bottom surface and two intersected side surfaces, after the clamping block 314 is clamped into the clamping groove 315, a third reset part 316 is arranged between the knob 311 and the gear ring 312 and is used for driving the knob 311 to reset, one end of the third compression spring abuts against the knob 311, the other end of the third compression spring abuts against the gear ring 312, the other end abuts against the gear ring 312, the button is enabled to be enabled to rotate towards the side of the gear ring 311 to be enabled to be opposite to the side of the compression spring, and the gear ring 311 is enabled to rotate towards the side of the compression spring, and the gear ring is enabled to rotate towards the side of the compression spring when the compression ring 312 is enabled to rotate, and the compression spring is enabled to rotate towards the side of the gear ring 312, and the compression spring is enabled to rotate, and the side is enabled to be opposite to the compression force to rotate, and has no external force. The first reset portion 324, the second reset portion 331 and the third reset portion 316 may also be elastic sheets with elastic deformation capability.

Referring to fig. 1 to 8, the electric tool includes the electric device and the shearing mechanism 4, the shearing mechanism 4 is used for cutting, the shearing mechanism 4 includes a transmission part 41, the transmission part 41 is meshed with the driving part 21, after the driving assembly 2 drives the shearing mechanism 4 to move, the spline connection part of the gear 22 and the eccentric member 43 can be clamped with each other, so that the gear 22 and the eccentric member 43 are difficult to disassemble, the shearing mechanism 4 is difficult to disassemble, after the driving part 21 is finely tuned, the gear 22 synchronously rotates, or after the gear 22 is finely tuned, the driving part 21 synchronously rotates, the relative position between the gear 22 and the eccentric member 43 is changed, and the clamping condition is released, so that the gear 22 and the eccentric member 43 can be smoothly disassembled and assembled.

Referring to fig. 6 and 7, the shearing mechanism 4 further includes a housing 42, an eccentric member 43 and two blades 44, the two blades 44 are stacked up and down, the housing 42 is detachably connected with the machine body 1, the eccentric member 43 extends out of the housing 42, an extending portion is provided with internal threads and is in spline connection with the gear 22, and the eccentric member 43 is engaged with the driver 21 to drive the two blades 44 to reciprocate, so as to form a cut.

Referring to fig. 7 and 8, at least one fastening member 421 is disposed on the housing 42, an elastic member is disposed between the fastening member 421 and the housing 42, the elastic member may be an elastic sheet or a compression spring, one end of the elastic member abuts against the fastening member 421, the other end abuts against the housing 42, the fastening member 421 is in fastening connection with the machine body 1, the fastening member 421 includes a pressing portion 4211 and at least one fastening portion 4212, the fastening portions 4212 on the fastening member 421 are two, the positions between the two fastening portions 4212 are the same in height and parallel to each other, the pressing portion 4211 may be circular or rectangular, the pressing portion 4211 and the fastening portion 4212 extend out of the housing 42, a side hole and a top hole are opened in the housing 42, the pressing portion 4211 extends out of the housing 42 through the side hole, the fastening portion 4212 extends out of the housing 42 through the top hole, the fastening portion 4212 includes a vertical plate and a transverse plate, the vertical plate and the transverse plate are integrally formed, the vertical plate and the transverse plate are fixedly connected or integrally formed, the fastening portion 4212 is mutually perpendicular to each other, a connecting member corresponding to the fastening portion 4212 is provided on the inner side of the machine body 1, and in a preferred embodiment, the fastening portion 4212 is provided with at least two fastening portions 425, and the fastening portion 425 is placed in the machine body 1, and can be triggered by the fastening portion 425, and the fastening portion 425 is displaced in the machine body 1. Preferably, the fastening member 4212 is driven by an elastic member capable of elastic deformation to move between a locking position and a detaching position, wherein the elastic member is in a free state when the fastening member 4212 is in the locking position, and the elastic member is pressed to have a restoring force when the fastening member 4213 is in the detaching position, so that the fastening member 4212 is not moved at will when being limited after being placed into the caulking groove 5 of the machine body 1.

Further, the number of the fastening portions 4212 is 4, and 4 fastening portions 4212 are held at intervals to the housing 42 in such a manner that each fastening portion 4212 is reciprocally movable with respect to the housing 42 in the locking position and the removing position. The snap 4212 is preferably held to the side of the housing 42 to reduce the height of the shear mechanism 4 and also reduce knocks caused by localized protrusions on the surface.

It should be noted that the connection piece of the machine body 1 may be implemented as a caulking groove 5, and in other variant embodiments, the manner in which the machine body 1 is connected to the shearing mechanism 4 may also be implemented as a magnetic attraction, locking.

Alternatively, the connecting member may be implemented as a protrusion 5, and the fastening member 421 is provided with a corresponding groove, so that the fastening member 421 is fastened to the machine body 1 in a manner that the fastening member 421 is fastened to the protrusion 5, so as to detachably mount the shearing mechanism 4 and the machine body 1.

Working principle: when the gear 22 is finely tuned, the knob 311 is pressed, the third compression spring is compressed, the clamping block 314 on the knob 311 is embedded into the clamping groove 315 of the gear ring 312, the knob 311 is rotated, the gear ring 312 is driven to rotate by rotation of the knob 311, the gear 321 moves along the direction perpendicular to the pressed direction of the knob 311 due to engagement of the gear ring 312 and the gear 321, at the moment, the second compression spring is compressed, the ejector rod 322 pushes the gear 22 to rotate and finely tune, the ejector rod 322 rotates towards the side deviating from the gear 22, the first compression spring is compressed, the relative position between the gear 22 and the eccentric member 43 is changed, the gear 22 and the eccentric member 43 can be smoothly disassembled, after the disassembly is completed, the knob 311 is released, the ejector rod 322 is reset under the action of the restoring force of the first compression spring, the gear 321 is reset under the action of the restoring force of the second compression spring, and the knob 311 is reset under the action of the restoring force of the third compression spring.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.

Claims (16)

1. An electrically powered device, wherein the electrically powered device is adapted to be detachably connected to a shearing mechanism (4), characterized in that: the automatic fine adjustment device comprises a machine body (1), a driving assembly (2) and a fine adjustment assembly (3), wherein the driving assembly (2) is arranged on the machine body (1), the driving assembly (2) comprises a driving piece (21), the fine adjustment assembly (3) is circumferentially meshed with the driving piece (21), so as to drive the driving piece (21) to circumferentially rotate, and the self-deflection position rotates to a reset position.

2. The electric device of claim 1, wherein: the driving member (21) is provided with splines, and when the driving member (21) is held in the reset position, the driving member (21) is abutted against a transmission member (41) of the shearing mechanism (4) in a spline connection manner.

3. The electric device of claim 1, wherein: the fine adjustment assembly (3) comprises a trigger part (31) and a connecting part (32), the connecting part (32) is connected with the driving piece (21) in a transmission mode, the trigger part (31) is twisted after being pressed, and the connecting part (32) is displaced in a driving mode by the trigger part (31).

4. The electric device of claim 1, wherein: the driving assembly (2) further comprises a gear (22), the driving piece (21) is driven by the gear (22), the fine adjustment assembly (3) comprises a triggering part (31) and a connecting part (32), the connecting part (32) is meshed with the gear (22), and the triggering part (31) drives the gear (22) to circumferentially rotate through the connecting part (32), so that the driving piece (21) is driven to circumferentially rotate.

5. The electric device of claim 1, wherein: the driving assembly (2) further comprises a gear (22), the driving piece (21) is driven by the gear (22), the gear (22) is coaxially arranged on the driving piece (21), and the driving piece (21) is driven by the gear (22) to coaxially rotate.

6. The electric device of claim 5, wherein: the gear wheel (22) is fixedly connected to the drive member (21).

7. The electrically powered device of claim 4, wherein: the connecting part (32) comprises a rack (321) and a push rod (322) hinged with the end part of the rack (321), a protrusion (323) is arranged on one side of the push rod (322) and is meshed with the gear (22), and a first resetting part (324) is arranged between the push rod (322) and the machine body (1) and used for driving the push rod (322) to reset.

8. The electrically powered device of claim 7, wherein: the first reset part (324) is a first compression spring, a groove (3221) is formed in one side, deviating from the protrusion (323), of the ejector rod (322), and one end of the first compression spring extends into the groove (3221).

9. The electrically powered device of claim 7, wherein: the fine adjustment assembly (3) further comprises a frame body (33), a second reset part (331) is arranged between the frame body (33) and the rack (321) and used for driving the rack (321) to reset, and the trigger part (31) is used for driving the rack (321) to move.

10. An electrically powered device according to claim 3, wherein: the triggering part (31) comprises a knob (311) and a gear ring (312), the knob (311) can be meshed with the rack (321), and the gear ring (312) is driven by the knob (311) to move so as to drive the rack (321) to move.

11. The electrically powered device of claim 10, wherein: fixedly connected with axis body (313) on knob (311), axis body (313) one end run through support body (33), and with support body (33) swing joint, ring gear (312) with axis body (313) swing joint, knob (311) inboard is provided with fixture block (314), ring gear (312) orientation one side of knob (311) sets up draw-in groove (315), draw-in groove (315) with fixture block (314) looks adaptation, knob (311) with be provided with third portion (316) that resets between ring gear (312) are used for driving knob (311) are reset.

12. Electric tool, its characterized in that: comprising an electric device according to any one of claims 1 to 11 and a shearing mechanism (4), said shearing mechanism (4) being detachably connected to a driving member (21) of the driving assembly (2), said shearing mechanism (4) comprising at least one transmission member (41), an eccentric member (43) and at least two blades (44), the driving member (21) being in driving connection with said transmission member (41) for driving the eccentric member (43), both said blades (44) being in driving connection with said eccentric member (43) respectively and being reciprocally movable.

13. The power tool of claim 12, wherein: the transmission piece (41) and the eccentric member (43) are integrally formed.

14. The power tool of claim 12, wherein: the transmission member (41) is provided with splines, and the transmission member (41) is connected to the driving member (21) in a spline connection manner.

15. The power tool of claim 12, wherein: the transmission member (41) is provided with an internal spline, and the driving member (21) is provided with an external spline, wherein the transmission member (41) is connected to the driving member (21) in a spline connection manner.

16. The power tool of claim 12, wherein: the shearing mechanism (4) further comprises a shell (42), at least one buckling piece (421) is arranged on the shell (42), an elastic piece is arranged between the buckling piece (421) and the shell (42), and the buckling piece (421) is connected with the machine body (1) in a buckling mode.

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