CN115351851B

CN115351851B - External rotor electric planer and auxiliary device thereof

Info

Publication number: CN115351851B
Application number: CN202211060100.4A
Authority: CN
Inventors: 徐峰; 赵晓理; 王红超; 方一鸣
Original assignee: Zhejiang Minli Power Tools Co ltd
Current assignee: Zhejiang Minli Power Tools Co ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2023-04-11
Anticipated expiration: 2042-08-31
Also published as: CN115351851A

Abstract

The invention discloses an external rotor electric planer and an auxiliary device thereof, which comprises an electric planer body and a cutter shaft, wherein a cavity is arranged in the electric planer body, the cavity is internally provided with the auxiliary device, the auxiliary device comprises a driving component, a force storage component, a locking component, an adjusting component and a control component, the electric planer can be horizontally placed on a planing surface and can be normally planed when moving forwards through the cooperation of a plurality of components, the cutter shaft is lifted slightly after planing is finished, the cutter shaft can be pressed downwards to normally plane again when the electric planer returns to an initial position, the electric planer is not required to be lifted integrally and returns to the original position when planing is carried out next time, the arm stress of a user is greatly reduced, the working time is prolonged, the working efficiency is increased, and the quality of a workpiece can be guaranteed.

Description

External rotor electric planer and auxiliary device thereof

Technical Field

The invention relates to the field of electric planers, in particular to an outer rotor electric planer and an auxiliary device thereof.

Background

The electric planer is a hand-held electric tool which uses a single-phase series motor to drive a planer tool through a transmission belt to carry out planing operation, has the characteristics of high production efficiency, flat and smooth planing surface and the like, is widely used in the occasions of house construction, house decoration, woodwork workshops, field woodworking operation, vehicle, ship, bridge construction and the like, and carries out operations such as plane planing, chamfering, notching and the like of various woods.

Because the cutter shaft is fixed in the electric planer, when the electric planer is used, the electric planer is attached to the planing surface and moves forwards, so that planing is realized, then the electric planer is lifted and returns to the original position, and forward planing is carried out after the planing surface is attached continuously.

In this in-process, the user all needs the lifting electric planer wholly when planing at every turn, leads to after carrying out the planing work for a long time, and user's arm is sour, produces tired sense, not only can influence work efficiency, and the work piece quality of producing moreover also can receive the influence.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an outer rotor electric planer and an auxiliary device thereof, which can effectively solve the problems of the traditional electric planer.

The technical scheme adopted by the invention for solving the technical problems is as follows: an outer rotor electric planer and an auxiliary device thereof comprise an electric planer body and a cutter shaft, wherein a cavity is arranged in the electric planer body, an auxiliary device is arranged in the cavity, the auxiliary device comprises a driving assembly, the driving assembly is rotatably arranged in the body, and the driving assembly is rotated when the body is translated; the power storage assembly is movably arranged on the driving assembly, when the power storage assembly is fixed, the driving assembly stores the rotating force in the power storage assembly when rotating, and when the power storage assembly releases the rotating force; the locking component enables the power accumulating component to keep a fixed state on the driving component when the electric planer body is horizontally arranged and moves forwards, and the locking component enables the power accumulating component to keep a movable state on the driving component when the electric planer body is lifted and moves backwards; the adjusting assembly is arranged at the cutter shaft and is used for controlling the cutter shaft to form a working state and a contraction state in the electric planer body; the control assembly comprises a first control assembly and a second control assembly, the first control assembly is used for controlling the cutter shaft to be switched from the working state to the contraction state, and the second control assembly is used for controlling the cutter shaft to be switched from the contraction state to the working state.

In the above technical solution, further, the driving assembly is a roller, a first rotating shaft is disposed on the roller, two ends of the first rotating shaft are respectively embedded into the electric planer body, and the power storage assembly is disposed on the first rotating shaft.

In the above technical solution, further, the power storage assembly includes a ratchet and a coil spring, and the coil spring is used for connecting the ratchet and the first rotating shaft.

Among the above-mentioned technical scheme, furtherly, the locking subassembly is the pawl, the pawl sets up on the movable block, movable block one end is provided with first fixed block and is in be provided with first spring between movable block and the first fixed block, the movable block other end is provided with the locking block, the locking block top is provided with the second fixed block, the locking block with be provided with the second spring between the second fixed block, be provided with the cooperation groove on the movable block, be provided with the cooperation piece on the locking block, when the locking block shifts up, make the cooperation piece breaks away from the cooperation groove makes the movable block to the ratchet direction removes, the pawl with the ratchet cooperation.

Among the above-mentioned technical scheme, furtherly, adjusting part is including setting up the spring holder at arbor both ends, when the spring holder is in compression state, the arbor is operating condition, when the spring holder is natural state, the arbor is the contraction state, be provided with the second pivot on the arbor, be provided with the bearing in the second pivot, the spring holder sets up the bearing below, second pivot both ends are embedded into a track, the second pivot is in the track internalization, the second pivot is unanimous with driving motor's motor shaft distance, one side of second pivot is provided with the electro-magnet, and the opposite side is provided with rotatable magnet, magnet adsorbs when on the electro-magnet, the spring holder is compression state, magnet breaks away from during the electro-magnet, the spring holder is natural state.

In the above technical solution, further, the first control assembly cooperates with the power storage assembly and includes a first rack and a second rack, a gear is disposed between the first rack and the second rack, the first rack is disposed at an upper end of the second rack, a third fixed block is disposed at one side of the first rack, a third spring is disposed between the first rack and the third fixed block, a connecting rope is disposed between the ratchet and the first rack, the connecting rope passes through the third fixed block, a top block is disposed on the second rack, the top block is embedded into a power supply device for controlling on/off of the electromagnet, a first connecting block and a second connecting block for controlling on/off of a circuit are disposed in the power supply device, a gap is disposed at a joint of the first connecting block and the second connecting block, and the top block is attached to the gap, the upper end of the first connecting block and the lower end of the second connecting block are provided with fourth springs, the second control assembly is matched with the locking block, a lifting plate is further arranged on the locking block, a pushing device is arranged on one side of the locking block and comprises a first pushing device and a second pushing device, the first pushing device and the second pushing device are connected through a connecting pipe, a piston rod is arranged on the first pushing device, a push rod is arranged on the second pushing device, the lifting plate is arranged at the lower end of the piston rod, the push rod faces the direction of the magnet, hydraulic oil is arranged in the first pushing device and the second pushing device, and after the locking block moves upwards, the push rod moves towards the direction of the magnet through the matching of the first pushing device and the second pushing device, so that the magnet is close to the electromagnet.

The invention has the beneficial effects that: the electric planer is kept flat on the planing surface and can be used for normal planing when moving forwards, the rear end of the electric planer is lifted slightly after planing is finished to lift the cutter shaft, the cutter shaft can be pressed down to perform normal planing operation again when the electric planer returns to the initial position, and the electric planer does not need to be lifted and is integrally lifted and returns to the original position when planing is performed for the next time, so that the arm stress of a user is greatly reduced, the working time is prolonged, the working efficiency is increased, and the workpiece quality can be guaranteed.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is an internal structure view of an electric planer according to the present invention.

FIG. 2 is a view showing the initial state of the locking assembly, power accumulating assembly and first control assembly of the present invention.

FIG. 3 is a structural view showing a locking state of the locking assembly, a power accumulating state of the power accumulating assembly, and an initial state of the first control assembly according to the present invention.

FIG. 4 is a block diagram of the initial state of the locking assembly, the initial state of the power storage assembly, and the active state of the first control assembly of the present invention.

FIG. 5 is a top plan view of the locking assembly, power storage assembly, first control assembly of the present invention.

Fig. 6 is a schematic view of the cutter shaft of the present invention in a working state.

Fig. 7 is a schematic view of the cutter shaft of the present invention in a contracted state.

Fig. 8 is a front view of the knife shaft of the invention in a working state.

Fig. 9 is a front view of the arbor of the present invention in a retracted state.

FIG. 10 is a schematic view of the locking block and the second control assembly of the present invention in an initial state.

FIG. 11 is a schematic view of the locking block and the second control assembly of the present invention in operation.

In the drawing, 1, an electric planer body, 2, a second fixed block, 3, a pawl, 4, a first rotating shaft, 5, a coil spring, 6, a roller, 7, a convex strip, 8, a ratchet, 9, a connecting rope, 10, a third fixed block, 11, a third spring, 12, a first rack, 13, a gear, 14, a fourth spring, 15, a power supply device, 16, a first connecting block, 17, a second connecting block, 18, a top block, 19, a second rack, 20, a first fixed block, 21, a first spring, 22, a movable block, 23, a matching groove, 24, a matching block, 25, a locking block, 26, a second spring, 27, a rail, 28, a magnet, 29, a cutter shaft, 30, a second rotating shaft, 31, a spring seat, 32, a bearing, 33, an electromagnet, 34, a lifting plate, 35, a piston rod, 36, a fifth spring, 37, a first pushing device, 38, a connecting pipe, 39, a second pushing device and 40 push rods.

Detailed description of the preferred embodiments

Referring to fig. 1-11, an external rotor electric planer and its auxiliary device includes an electric planer body 1, a cutter shaft 29, a cavity is provided in the electric planer body 1, an auxiliary device is provided in the cavity, the auxiliary device includes a driving component rotatably provided in the body, the driving component rotates when the body translates; the power storage assembly is movably arranged on the driving assembly, when the power storage assembly is fixed, the driving assembly stores the rotating force in the power storage assembly when rotating, and when the power storage assembly releases the rotating force; the locking assembly enables the power storage assembly to keep a fixed state on the driving assembly when the electric planer body 1 is horizontally placed and moves forwards, and enables the power storage assembly to keep a movable state on the driving assembly when the electric planer body 1 is lifted and moves backwards; the adjusting assembly is arranged at the cutter shaft 29 and is used for controlling the cutter shaft 29 to form a working state and a contraction state in the electric planer body 1; and the control assembly comprises a first control assembly and a second control assembly, the first control assembly is used for controlling the cutter shaft 29 to be switched from the working state to the contraction state, and the second control assembly is used for controlling the cutter shaft 29 to be switched from the contraction state to the working state.

Wherein, drive assembly is gyro wheel 6, gyro wheel 6 transversely sets up the rear end region of electric planer body 1 the 6 centers of gyro wheel are provided with first pivot 4, the both ends of first pivot 4 all imbed to on the shell of electric planer body 1, the surface of gyro wheel 6 is provided with annular align to grid's sand grip 7, sand grip 7 is flexible rubber material, sand grip 7 is higher than the lower terminal surface of electric planer body 1, works as when electric planer body 1 is kept flat the sand grip 7 is extruded, makes the lower terminal surface of electric planer body 1 remains the horizontality throughout, sets up sand grip 7 is in order to increase the frictional force of gyro wheel 6, the power storage device sets up on first pivot 4, and set up at its terminal position.

The power storage assembly comprises a ratchet wheel 8 and a coil spring 5, the ratchet wheel 8 is a sleeve ring, the middle of the ratchet wheel is hollow, ratchet teeth are arranged on the outer end face of the sleeve ring, the inner end of the coil spring 5 is fixedly wound on the first rotating shaft 4, the outer end of the coil spring 5 is fixedly arranged on the inner end face of the sleeve ring, the direction of the ratchet teeth on the ratchet wheel 8 is the advancing direction of the electric planer body 1, the ratchet wheel 8 is rotatably arranged on the side face of the electric planer body 1, a fixed column is arranged on the side face of the electric planer body 1, a bearing is arranged on the fixed column, the bearing is embedded into an inner hole of the ratchet wheel 8 and does not contact with the coil spring 5, and the rotation of the ratchet wheel 8 is not influenced while the ratchet wheel 8 is fixed.

Wherein, in order to unlock and lock the power storage assembly, a locking assembly is arranged at one side of the power storage assembly, the locking assembly comprises a movable block 22 and a pawl 3, the pawl 3 is fixed on the movable block 22, the pawl 3 is separated from the ratchet wheel 8 or is matched with the ratchet wheel 8 through the movement of the movable block 22, the movable block 22 is arranged at the left side of the ratchet wheel 8, a first fixed block 20 is arranged between the ratchet wheel 8 and the movable block 22, the first fixed block 20 is connected with the movable block 22 through a first spring 21, the pawl 3 on the movable block 22 is matched with the ratchet wheel 8 through compressing the first spring 21, after the first spring 21 is restored, the pawl 3 is separated from the ratchet wheel 8, and the pawl 3 in the initial state is not matched with the ratchet wheel 8, the left side of the movable block 22 is provided with a locking block 25, the locking block 25 is movable up and down, in order to limit the locking block 25, a limit post is arranged on the left side of the locking block 25, the limit post limits the front side and the rear side of the locking block 25, a second fixed block 2 is arranged on the top of the locking block 25, a second spring 26 is arranged between the locking block 25 and the second fixed block 2, when the second spring 26 is in a natural state, the lower end of the locking block 25 protrudes out of the outer end of the electric planer body 1, when the locking block 25 and the lower end face of the electric planer body 1 are kept parallel and level, the second spring 26 is in a contraction state, a matching block 24 is arranged at the right end of the locking block 25, a matching groove 23 is arranged on the left side of the movable block 22, the matching groove 23 and the upper end face of the matching block 24 are inclined planes, in an initial state, the first spring 21 and the second spring 26 are kept in a natural state, the lower end of the locking block 25 protrudes out of the electric planer body 1, when the electric planer body 1 is laid on a planing surface, the locking block 25 moves upwards and is flush with the lower end surface of the electric planer body 1, the engaging block 24 is disengaged from the engaging groove 23, the movable block 22 moves towards the ratchet 8, the first spring 21 and the second spring 26 are both compressed, wherein the elastic force of the second spring 26 is greater than that of the first spring 21, when the electric planer body 1 is lifted, the second spring 26 first moves the locking block 25 downwards, the engaging block 24 on the locking block 25 is re-inserted into the engaging groove 23 on the movable block 22, the first spring 21 is restored to a natural state at this time, and the pawl 3 is disengaged from the ratchet 8.

The adjusting assembly comprises spring seats 31 arranged at two ends of the cutter shaft 29, a second rotating shaft 30 is arranged on the cutter shaft 29, two groups of bearings 32 are arranged on the second rotating shaft 30 and are positioned at two ends of the cutter shaft 29, the spring seats 31 are arranged at the lower ends of the bearings 32 and are fixedly connected with the bearings 32, the second rotating shaft 30 is connected with a driving motor in the electric planer body 1 through a belt, the cutter shaft 29 needs to move a specific track when moving, namely, a motor shaft on the driving motor is used as a rotation center, the second rotating shaft 30 performs arc motion by using the specific track, a track 27 is arranged on the side surface of the electric planer body 1, the second rotating shaft 30 is embedded into the track 27, so that the distance between the second rotating shaft 30 and the motor shaft of the driving motor is kept consistent in real time, and a movable magnet 28 is arranged on the left side of the second rotating shaft 30, a horizontally arranged electromagnet 33 is arranged on the right side, supporting blocks are arranged on the side surface of the electric planer body 1 in a protruding mode to ensure that the magnet 28 and the electromagnet 33 are kept in a fixed state on two sides of the second rotating shaft 30, wherein a coil spring is arranged at the position of the magnet 28, the coil spring is in a rolling state when the magnet 28 is adsorbed by the electromagnet 33, when the electromagnet 33 loses magnetism, the magnet 28 is far away from the electromagnet 33 under the action of the coil spring, in an initial state, the electromagnet 33 keeps magnetism, the magnet 28 is adsorbed on the electromagnet 33, the magnet 28 presses the second rotating shaft 30, in order to prevent the magnet 28 from being adsorbed on the second rotating shaft 30, a bearing is further arranged on the second rotating shaft 30, and a flexible rubber pad is arranged on the outer ring of the bearing, so that an adsorption effect cannot be generated when the bearing is pressed, the spring seat 31 is in a compressed state, the knife shaft 29 is in a working state, when the electromagnet 33 loses magnetism, the magnet 28 is far away from the electromagnet 33 under the action of a coil spring, and the knife shaft 29 is moved upwards under the action of the spring seat 31.

Wherein, the control assembly comprises a first control assembly and a second control assembly, the first control assembly is matched with the power storage assembly and comprises a first rack 12 and a second rack 19, the first rack 12 is positioned above the second rack 19, in order to limit the first rack 12 and the second rack 19, a sliding rail seat is arranged at the upper end surface of the first rack 12 and the lower end surface of the second rack 19, so that the first rack 12 and the second rack slide on the sliding rail seat, a gear 13 is arranged between the first rack 12 and the second rack 19 for matching, a third fixed block 10 is arranged at the left side of the first rack 12, a third spring 11 is arranged between the third fixed block 10 and the left end surface of the first rack 12, and a connecting rope 9 is arranged at the left end surface of the first rack 12, the connecting rope 9 passes through the third spring 11 and the third fixed block 10 to be connected with the ratchet wheel 8, a winding pipe is arranged on the ratchet wheel 8, the other end of the connecting rope 9 is fixed on the winding pipe, in an initial state, the connecting rope 9 is in a tensioning state, the power storage assembly generates a power storage when the electric planer body 1 advances, when the power storage assembly is unlocked, the generated power storage is released, the winding pipe on the ratchet wheel 8 rotates reversely and then pulls the connecting rope 9, the first rack 12 moves towards the third spring 11 by the pulling force to compress the third spring 11, the second rack 19 moves towards the right through the gear 13, a power supply device 15 for controlling the on-off of the electromagnet 33 is arranged on the right side of the second rack 19, and a first connecting block 16 and a second connecting block 17 for controlling the on-off of a circuit are arranged in the power supply device 15, when first connecting block 16 and second connecting block 17 are in the contact state, power supply unit 15 then is in the power supply state, first connecting block 16 is located the top, and second connecting block 17 is located the below, and both all imbed to an activity inslot still be provided with fourth spring 14 in the activity inslot, through the extrusion of fourth spring 14, make first connecting block 16 and second connecting block 17 are in a state of contact, be provided with kicking block 18 at the right side terminal surface of second rack 19, be provided with the breach simultaneously at the left side one end of first connecting block 16 and second connecting block 17, under the initial condition, kicking block 18 is located breach department and kicking block 18 with first connecting block 16 and second connecting block 17 contact but do not produce the extrusion force, in order to avoid causing the scraping to first connecting block 16 and second connecting block 17, the upper side and the lower side of the end part of the top block 18 are both provided with an inclined plane which is attached to the first connecting block 16 and the second connecting block 17, when the second rack 19 is acted by an acting force, the top block 18 extrudes the first connecting block 16 and the second connecting block 17 to make the first connecting block 16 and the second connecting block 17 disconnected, the electromagnet 33 loses magnetism, the cutter shaft 29 is not limited and forms a contraction state under the action of the spring seat 31, the second control component is matched with the locking block 25, the second control component is a pushing device which comprises a first pushing device 37 and a second pushing device 39, the first pushing device 37 and the second pushing device 39 are connected through a connecting pipe 38, a lifting plate 34 is arranged on one side opposite to the matching block 24 on the locking block 25, and the first pushing device 37 and the second pushing device 39 are arranged in the direction, two connected chambers are arranged in the first pushing device 37, wherein a left chamber is a cavity, hydraulic oil is arranged in a right chamber, a piston rod 35 is arranged at the lower end of the left chamber, a fifth spring 36 is further arranged in the left chamber, the fifth spring 36 is located below the piston rod 35, in an initial state, the piston rod 35 is attached to the lifting plate 34, hydraulic oil is arranged in the second pushing device 39 and the connecting pipe 38, a push rod 40 is arranged at the right end of the second pushing device 39, in the initial state, the push rod 40 is close to the magnet 28, when the locking block 25 is pressed, the lifting plate 34 pushes the piston rod 35 to move upwards, so that the hydraulic oil in the first pushing device 37 is pressed into the second pushing device 39, the push rod 40 is pressed towards the magnet 28, so that the magnet 28 is pressed towards the electromagnet 33, and when the locking block 25 is restored to the initial state, the piston rod 35 enables the first pushing device 37 and the second pushing device 39 to be restored to the original state under the action of the fifth spring 36.

The working process of the invention is as follows: first, in the initial state, the magnet 28 is attracted to the electromagnet 33, the lower end of the locking block 25 protrudes out of the electric planer body 1, the electric planer is placed on a planing surface, and a slight downward force is applied, when the locking block 25 is located at the initial position, the locking block 25 moves upward to press the second spring 26, the engaging block 24 on the locking block 25 disengages from the engaging groove 23 on the moving block 22, so that the moving block 22 moves toward the ratchet 8, the first spring 21 is pressed, the pawl 3 engages with the ratchet 8, the lifting plate 34 on the locking block 25 moves upward to press the piston rod 35, and the fifth spring 36 is stretched, the hydraulic oil in the first pushing device 37 is pressed into the second pushing device 39, the push rod 40 in the second pushing device 39 moves toward the magnet 28, and since the magnet 28 is attracted to the electromagnet 33 for the first time, the push rod 40 does not contact with the magnet 28.

The user pushes the electric planer body 1 forward, the roller 6 rolls, since the ratchet 8 is limited by the pawl 3, the coil spring 5 winds up to store power, when the electric planer body 1 slides to the end, the user slightly lifts the rear end of the electric planer body 1, the locking block 25 is restored to the initial position downward by the action of the second spring 26, the mating block 24 on the locking block 25 is re-inserted into the mating groove 23 on the movable block 22, the pawl 3 is disengaged from the ratchet 8, the lifting plate 34 no longer presses the piston rod 35, the first pushing device 37 and the second pushing device 39 are mated by the fifth spring 36, the push rod 40 is restored, at the same time, the coil spring 5 in the ratchet 8 releases the stored power, for balance, the coil spring 5 and the roller 6 rotate simultaneously, the stored power is released, during the releasing, the ratchet 8 rotates backward and pulls the connecting rope, the connecting rope drives the first rack 12 to move toward the ratchet 8, the third rack 12 compresses, the connecting block 18 and the connecting block 16 moves away from the connecting block 16, the connecting block 16 is retracted by the magnet, the second connecting block 16, the connecting block 16 is retracted by the magnet, and the magnet 16, the connecting block is retracted in the connecting block 16, the electromagnet 33 recovers its magnetic properties, but at this time, the magnet 28 is in a distant state and is no longer attracted.

The user translation behind the home position is got back to electric planer body 1, makes its laminating planing face again, extrudees again locking block 25, this moment pawl 3 again with ratchet 8 cooperation, through locking block 25 with first thrust unit 37 and second thrust unit 39 cooperation, push rod 40 promotes magnet 28 to the electro-magnet 33 direction is close to, magnet 28 is at the rotation in-process, will arbor 29 presses to operating position again, and after magnet 28 is close to a certain position, electro-magnet 33 with magnet 28 adsorbs mutually, continues above-mentioned operation of repetition, can normally plane.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention in any way, and simple modifications, equivalent changes and modifications may be made without departing from the technical scope of the present invention.

Claims

1. An external rotor electric planer and its auxiliary device, which comprises an electric planer body and a cutter shaft, wherein a cavity is arranged in the electric planer body, characterized in that the cavity is internally provided with an auxiliary device, the auxiliary device comprises,

the driving assembly is rotatably arranged in the body, and the driving assembly rotates when the body translates;

the power storage assembly is movably arranged on the driving assembly, when the power storage assembly is fixed, the driving assembly stores the rotating force in the power storage assembly when rotating, and when the power storage assembly releases the rotating force;

the locking assembly enables the power storage assembly to keep a fixed state on the driving assembly when the electric planer body is horizontally placed and moves forwards, and enables the power storage assembly to keep a movable state on the driving assembly when the electric planer body is lifted and moves backwards;

the adjusting assembly is arranged at the cutter shaft and is used for controlling the cutter shaft to form a working state and a contraction state in the electric planer body;

the control assembly comprises a first control assembly and a second control assembly, the first control assembly is used for controlling the cutter shaft to be switched from the working state to the contraction state, and the second control assembly is used for controlling the cutter shaft to be switched from the contraction state to the working state;

the driving assembly is a roller, a first rotating shaft is arranged on the roller, two ends of the first rotating shaft are respectively embedded into the electric planer body, and the power storage assembly is arranged on the first rotating shaft;

the power storage assembly comprises a ratchet wheel and a coil spring, and the coil spring is used for connecting the ratchet wheel and the first rotating shaft;

the locking assembly is a pawl, the pawl is arranged on a movable block, one end of the movable block is provided with a first fixed block, a first spring is arranged between the movable block and the first fixed block, the other end of the movable block is provided with a locking block, a second fixed block is arranged above the locking block, a second spring is arranged between the locking block and the second fixed block, the movable block is provided with a matching groove, the locking block is provided with a matching block, when the locking block moves upwards, the matching block is separated from the matching groove, the movable block moves towards the ratchet wheel, and the pawl is matched with the ratchet wheel;

the adjusting assembly comprises spring seats arranged at two ends of the cutter shaft, the cutter shaft is in a working state when the spring seats are in a compressed state, the cutter shaft is in a contracted state when the spring seats are in a natural state, a second rotating shaft is arranged on the cutter shaft, a bearing is arranged on the second rotating shaft, the spring seats are arranged below the bearing, two ends of the second rotating shaft are embedded into a track, the second rotating shaft moves in the track, the distance between the second rotating shaft and a motor shaft of a driving motor is consistent, an electromagnet is arranged at one side of the second rotating shaft, a rotatable magnet is arranged at the other side of the second rotating shaft, when the magnet is adsorbed on the electromagnet, the spring seats are in a compressed state, and when the magnet is separated from the electromagnet, the spring seats are in a natural state;

the first control component is matched with the power storage component and comprises a first rack and a second rack, a gear is arranged between the first rack and the second rack, the first rack is arranged at the upper end of the second rack, a third fixed block is arranged on one side of the first rack, a third spring is arranged between the first rack and the third fixed block, a connecting rope is arranged between the ratchet wheel and the first rack and penetrates through the third fixed block, a top block is arranged on the second rack and is embedded into a power supply device for controlling the on-off of the electromagnet, a first connecting block and a second connecting block for controlling the on-off of a circuit are arranged in the power supply device, a notch is arranged at the joint of the first connecting block and the second connecting block, the top block is jointed at the notch, and a fourth spring is arranged at the upper end of the first connecting block and the lower end of the second connecting block, the second control assembly is matched with the locking block, a lifting plate is further arranged on the locking block, a pushing device is arranged on one side of the locking block and comprises a first pushing device and a second pushing device, the first pushing device is connected with the second pushing device through a connecting pipe, a piston rod is arranged on the first pushing device, a push rod is arranged on the second pushing device, the lifting plate is arranged at the lower end of the piston rod, the push rod faces the direction of the magnet, hydraulic oil is arranged in the first pushing device and the second pushing device, and after the locking block moves upwards, the push rod moves towards the direction of the magnet through the matching of the first pushing device and the second pushing device, so that the push rod moves towards the direction of the magnet, and the magnet is close to the electromagnet.