CN215548831U

CN215548831U - Electric scissors

Info

Publication number: CN215548831U
Application number: CN202120744391.3U
Authority: CN
Inventors: 李保华
Original assignee: Shenzhen Luwei Technology Co ltd
Current assignee: Shenzhen Luwei Technology Co ltd
Priority date: 2021-04-13
Filing date: 2021-04-13
Publication date: 2022-01-18
Anticipated expiration: 2031-04-13

Abstract

The utility model provides electric shears, and relates to the technical field of shearing tools. Electric scissors includes the motor, a speed reducer, drive gear, the blade holder, fixed blade, movable blade and circuit board, the speed reducer is connected with the motor, drive gear sets up on the output shaft of speed reducer, the blade holder is connected with the shell of speed reducer, the rear end of fixed blade sets up in the front end of blade holder, the rear end of movable blade rotates with the front end of blade holder and is connected, the rear end of movable blade still is provided with the sector, the sector is suitable for and rotates along with the movable blade, one side that the sector is close to the blade holder is provided with circular arc rack and circular arc magnet, circular arc magnet sets up with the circular arc rack is concentric, circular arc rack and drive gear meshing, the circuit board sets up on the blade holder, it has linear hall sensor to integrate on the circuit, linear hall sensor sets up with circular arc magnet relatively. The shearing precision is improved.

Description

Electric scissors

Technical Field

The utility model relates to the technical field of shearing tools, in particular to an electric shears.

Background

The electric shears include, as one kind of electric tools, electric shears for shearing thick fibers such as a carpet, electric shears for shearing a cable, electric shears for trimming branches, and the like. These scissors typically comprise a fixed blade and a movable blade forming a knife edge therebetween. The movable blade is driven by the motor to do reciprocating swing under the drive of positive and negative rotation, so that the knife edge is continuously opened and closed. In order to reduce accidents occurring during use, the electric shears must meet the requirements of safety standards.

Because the electric shears are electric, the movable blade is driven by the motor, in order to ensure that an object to be sheared is sheared in place, the movable blade must have at least one accurate closing position, but after the traditional electric shears are used for a long time, the position of the movable blade cannot reach the initial accurate closing position due to factors such as blade abrasion and loose assembly, and the like, and the movable blade can only be maintained and adjusted through a hardware structure of the electric shears.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that after the traditional electric shears are used for a long time, the position of a movable blade cannot reach an initial accurate closing position due to factors such as blade abrasion and loose assembly, and only the hardware structure of the electric shears can be maintained and adjusted.

In order to solve the above problems, the present invention provides electric shears comprising:

a motor;

the speed reducer is connected with the motor;

the driving gear is arranged on an output shaft of the speed reducer;

the cutter holder is connected with the shell of the speed reducer;

the rear end of the fixed blade is arranged at the front end of the tool apron;

the rear end of the movable blade is rotationally connected with the front end of the tool apron, the rear end of the movable blade is also provided with a sector, the sector is suitable for rotating along with the movable blade, one side of the sector, which is close to the tool apron, is provided with an arc rack and an arc magnet, the arc magnet and the arc rack are concentrically arranged, and the arc rack is meshed with the driving gear; and

the circuit board is arranged on the cutter holder, a linear Hall sensor is integrated on the circuit, and the linear Hall sensor is opposite to the arc magnet.

Furthermore, a containing groove is formed in the position, close to the speed reducer, of the tool apron, and the containing groove is used for containing the driving gear.

Furthermore, the fixed blade and the tool apron are detachably connected, the movable blade and the tool apron are detachably connected, and the fan-shaped piece and the movable blade are detachably connected.

Further, the front end of blade holder is provided with the round pin axle, fixed blade the activity blade with the fan-shaped spare all overlaps and is located the round pin epaxially, wherein, the rear end of fixed blade still through first fixed pin with the blade holder is connected, the fan-shaped spare pass through the third fixed pin with the activity blade is connected.

Further, the fixed blade includes first shearing portion and first grafting portion, first grafting portion is provided with first extension, the activity blade includes second shearing portion and second grafting portion, the fan-shaped piece includes third grafting portion and fan-shaped spare body part, third grafting portion is provided with the third extension, wherein, first grafting portion cover is located sell epaxial and with the blade holder butt, first extension passes through first fixed pin with the blade holder is connected, second grafting portion cover is located sell epaxial and stack to on the first grafting portion, third grafting portion cover is located sell epaxial and stack to on the second grafting portion, the third extension pass through the third fixed pin with second shearing portion is connected.

Further, the tool apron is provided with a first recess, and the circuit board is arranged at the first recess.

Further, the tool holder is provided with a second recess in which the rear end of the fixed blade is placed.

Further, the electric shears further comprise a shell and a controller, the shell is of a cylindrical structure, the motor, the speed reducer, the driving gear, the fan-shaped piece, the tool apron and the controller are all arranged in the shell, and the motor and the circuit board are respectively electrically connected with the controller.

Further, the electric shears further comprises a trigger, the trigger is hinged to the tool apron, and the controller is suitable for controlling the motor to work after the trigger is sensed to be pulled down.

Furthermore, an arc groove is formed in the sector, and the arc magnet is suitable for being placed in the arc groove;

the electric shears further comprises a buckle, the buckle comprises a buckle body and a top cap, a first clamping groove group and a second clamping groove group are respectively formed in two side edges of the arc groove, at least two clamping grooves are respectively formed in the first clamping groove group and the second clamping groove, the clamping grooves in the first clamping groove group and the clamping grooves in the second clamping groove are arranged in a staggered mode, the clamping grooves are matched with the buckle body, and when the buckle body is installed in the clamping grooves, the top cap compresses and fixes the arc magnets arranged in the arc groove.

Compared with the prior art, the electric shears provided by the utility model have the following technical effects:

here, change moment through the motor with power via the speed reducer, the high rotational speed of motor makes drive gear rotatory after the speed reducer slows down, because drive gear and circular arc rack mesh, and then can drive the fan-shaped piece and rotate together with the movable blade, realizes shearing action through the rotation of movable blade. The arc magnet and the arc gear are arranged concentrically, so that the arc magnet can only do circular motion on an arc in the rotating process of the sector, the relative position of the arc magnet and a linear Hall sensor on a circuit board is always changed when the arc magnet rotates along with the sector and the movable blade, the magnetic field at the position of the linear Hall sensor is also always changed, the Hall voltage generated by the linear Hall sensor is also always changed, after the Hall voltage generated by the linear Hall sensor reaches a preset value, the motor stops working, the movable blade is accurately stopped at a preset included angle, the preset included angle is the included angle between the movable blade and the fixed blade when the Hall voltage reaches the preset value, and the shearing precision of the electric scissors is improved. In addition, even if the electric shears are used for a long time later, such as the shape of the movable blade or the fixed blade is changed, the movable blade or the fixed blade is provided with slack, the magnetic field intensity of the arc magnet is reduced, and the like, in this case, after the hall voltage generated by the linear hall sensor reaches the preset value, the motor stops working, the included angle between the movable blade and the fixed blade after the precise stop may no longer be the preset included angle, at the moment, only the preset value of the Hall voltage needs to be modified, the re-maintenance operation on the hardware structure is not needed, the operation is simple and convenient, the cost and the time are saved, the problem that after the traditional electric shears are used for a long time is solved, the problem that the initial accurate closing position of the movable blade cannot be reached and only the hardware structure of the electric shears can be maintained and adjusted due to the factors of blade abrasion, loose assembly and the like is often caused.

Drawings

FIG. 1 is a schematic structural view of electric shears according to an embodiment of the present invention;

FIG. 2 is a partial schematic structural view of electric shears according to an embodiment of the present invention;

FIG. 3 is a schematic block diagram of a sector of an embodiment of the present invention;

FIG. 4 is a schematic structural view of a tool holder according to an embodiment of the utility model;

FIG. 5 is a schematic block diagram of a stationary blade of an embodiment of the present invention;

FIG. 6 is a schematic block diagram of a movable blade of an embodiment of the present invention;

fig. 7 is a schematic distribution diagram of the snaps according to the embodiment of the present invention.

Description of the labeling:

1-motor, 2-speed reducer, 3-driving gear, 4-knife seat, 41-first recess, 42-second recess, 43-containing groove, 44-pin shaft, 441-nut, 5-fixed blade, 51-first shearing part, 52-first nesting part, 53-first extension part, 54-first fixed pin, 6-movable blade, 61-second shearing part, 62-second nesting part, 7-sector, 71-sector body part, 711-arc rack, 712-arc magnet, 713-top cap, 72-third nesting part, 73-third extension part, 74-third fixed pin, 8-circuit board, 9-trigger.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it is to be understood that the terms "front", "back", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Also, in the drawings, the X-axis indicates the front-rear position, and the positive direction of the X-axis (i.e., the arrow direction of the X-axis) indicates the front side, and the negative direction of the X-axis (i.e., the direction opposite to the positive direction of the X-axis) indicates the rear side; it should also be noted that the foregoing X-axis representation is merely intended to facilitate the description of the utility model and to simplify the description, and does not indicate or imply that the device or element so referred to must be constructed and operated in a particular orientation and therefore should not be considered limiting.

Referring to fig. 1 and 3, an electric shears according to an embodiment of the present invention includes a motor 1, a speed reducer 2, a driving gear 3, a tool post 4, a fixed blade 5, a movable blade 6, and a circuit board 8, where the speed reducer 2 is connected to the motor 1, the driving gear 3 is disposed on an output shaft of the speed reducer 2, the tool post 4 is connected to a housing of the speed reducer 2, a rear end of the fixed blade 5 is disposed at a front end of the tool post 4, a rear end of the movable blade 6 is rotatably connected to a front end of the tool post 4, a sector 7 is further disposed at a rear end of the movable blade 6, the sector 7 is adapted to rotate with the movable blade 6, an arc rack 711 and an arc magnet 712 are disposed on a side of the sector 7 close to the tool post 4, the arc magnet 712 is concentric with the arc rack 711 is disposed concentrically with the arc rack, the driving gear 3 is engaged with the circuit board 8 disposed on the tool post 4, and a linear hall sensor is integrated on the circuit, the linear hall sensor is disposed opposite to the circular-arc magnet 712.

Here, the torque is changed by the motor 1 through the speed reducer 2, the high rotation speed of the motor 1 is reduced by the speed reducer, and then the driving gear 3 rotates, and the driving gear 3 is engaged with the arc rack 711, so that the sector 7 and the movable blade 6 are driven to rotate, and the shearing action is realized by the rotation of the movable blade 6. By concentrically arranging the arc magnet 712 and the arc gear, it is ensured that the arc magnet 712 can only do circular motion on one arc in the rotation process of the sector 7, the relative position of the arc magnet 712 with the linear hall sensor on the circuit board 8 is always changed when the arc magnet 7 and the movable blade 6 rotate, the magnetic field at the position of the linear hall sensor is also always changed, the hall voltage generated by the linear hall sensor is also always changed, when the hall voltage generated by the linear hall sensor reaches a preset value, the motor 1 stops working, the movable blade 6 is accurately stopped at a preset included angle, wherein the preset included angle is the included angle between the movable blade 6 and the fixed blade 5 when the hall voltage reaches the preset value.

The aforementioned arrangement of the linear hall sensor and the circular arc magnet 712 "means: when the circular-arc magnet 712 performs circular motion on a circular arc, the linear hall sensor is always positioned right below the circular arc, i.e., the linear hall sensor is ensured to always generate hall voltage.

And it is understood that the center of the circular-arc magnet 712 is the rear end of the movable blade 6, that is, the center of the circular-arc magnet 712 is concentric with the center of the circle on which the movable blade 6 rotates.

In addition, even if the electric shears are used for a long time later, for example, the shape of the movable blade 6 or the fixed blade 5 is changed, for example, the movable blade 6 or the fixed blade 5 is assembled loosely, for example, the magnetic field intensity of the arc magnet 712 is reduced, and the like, under the condition, after the hall voltage generated by the linear hall sensor reaches the preset value, the motor stops working, the included angle between the movable blade 6 and the fixed blade 5 after the electric shears are stopped accurately may not be the preset included angle any more, at this time, only the preset value of the hall voltage needs to be modified, the re-maintenance operation of the hardware structure is not needed, and the electric shears are simple and convenient, and the cost and the time are saved.

Wherein, it should be explained that, switch hall sensor and circular magnet of traditional electric scissors, only when circular magnet removes the relative position to switch hall sensor, just have hall voltage to produce, consequently traditional electric scissors not only can't predetermine the contained angle through the procedure change, can only change the predetermined contained angle that movable blade corresponds through the position of removal switch hall sensor on the circuit board, circular arc magnet 712 and the linear hall sensor of this embodiment, just as aforementioned say, only need modify hall voltage's default can, need not maintain the operation again to hardware structure, and is simple and convenient, and the cost is saved and time.

Referring to fig. 1, 2 and 4, optionally, a containing groove 43 is formed in the position of the tool apron 4 close to the speed reducer 2, and the containing groove 43 is used for containing the driving gear 3.

Here, through set up storage tank 43 on blade holder 4 for drive gear 3 places, the integrated level is higher.

Alternatively, the fixed blade 5 is detachably connected to the holder 4, the movable blade 6 is detachably connected to the holder 4, and the sector 7 is detachably connected to the movable blade 6.

Referring to fig. 1 and 2, optionally, a pin 44 is disposed at the front end of the knife block 4, and the fixed blade 5, the movable blade 6 and the fan-shaped member 7 are all sleeved on the pin 44, wherein the rear end of the fixed blade 5 is further connected to the knife block 4 by a first fixing pin 54, and the fan-shaped member 7 is connected to the movable blade 6 by a third fixing pin 74.

Here, by sequentially overlapping the fixed blade 5, the movable blade 6, and the segment 7 on the pin 44, it is understood that the end of the pin 44 is connected to the nut 441 to prevent the fixed blade 5, the movable blade 6, and the segment 7 from falling off the pin 44, and then the fixed blade 5 is connected to the holder 4 by the first fixing pin 54, and the segment 7 is connected to the movable blade 6 by the third fixing pin 74, so as to prevent the fixed blade 5 from rotating, and the segment 7 rotates together with the movable blade 6, and at the same time, the disassembly is convenient and the integration degree is high.

Referring to fig. 2, 3, 5 and 6, optionally, the fixed blade 5 includes a first shearing portion 51 and a first sleeving portion 52, the first sleeving portion 52 is provided with a first extending portion 53, the movable blade 6 includes a second shearing portion 61 and a second sleeving portion 62, the sector 7 includes a third sleeving portion 72 and a sector body portion 71, the third sleeving portion 72 is provided with a third extending portion 73, wherein the first sleeving portion 52 is sleeved on the pin 44 and abuts against the holder 4, the first extending portion 53 is connected with the holder 4 through a first fixing pin 54, the second sleeving portion 62 is sleeved on the pin 44 and overlaps on the first sleeving portion 52, the third sleeving portion 72 is sleeved on the pin 44 and overlaps on the second sleeving portion 62, and the third extending portion 73 is connected with the second shearing portion 61 through a third fixing pin 74.

Here, the second hitching section 62 is supported by the first hitching section 52, and the third hitching section 72 is supported by the second hitching section 62, so that the movable blade 6 and the sector 7 are more smoothly rotated.

Wherein, fixed blade 5, movable blade 6 and fan-shaped 7 are the integral type structure, practice thrift manufacturing cost, increase structural strength simultaneously.

Referring to fig. 2 and 4, optionally, the tool holder 4 is provided with a first recess 41, and the circuit board 8 is provided at the first recess 41.

Here, by providing the first recess portion 41 as a mounting position of the circuit board 8, the integration of the electric shears as a whole is further improved.

Referring to fig. 2 and 4, the tool holder 4 is optionally provided with a second recess 42, in which the rear end of the fixed blade 5 is placed.

Here, by providing the second recessed portion 42 at the rear end of the fixed blade 5, that is, the first catching portion 52 and the first extending portion, to be engaged with the rear end of the fixed blade 5, the overall degree of integration can be further improved, and the load on the first fixing pin 54 can be reduced.

Optionally, the electric shears further comprises a housing and a controller, the housing is of a cylindrical structure, the motor 1, the speed reducer 2, the driving gear 3, the sector 7, the tool apron 4 and the controller are all arranged in the housing, and the motor 1 and the circuit board 8 are respectively electrically connected with the controller. The electric shears further comprises a trigger 9, the trigger 9 is hinged with the tool apron 4, and the controller is suitable for controlling the motor 1 to work after the trigger 9 is sensed to be pulled down.

Here, after the trigger 9 is pressed, the controller detects a signal that the trigger 9 is pressed and controls the motor 1 to operate, and as to the forward and reverse rotation of the motor 1, the following may be mentioned: after the circular telegram, press trigger 9 for the first time, the reversal of controller control motor 1, the reversal of motor 1 makes movable blade 6 rotate to the direction of keeping away from fixed blade 5, the electric scissors opens promptly, until the controller detects after hall voltage reaches first default, controller control motor 1 stops, press trigger 9 again after, the corotation of controller control motor 1, the corotation of motor 1 makes movable blade 6 rotate to the direction of being close to fixed blade 5, the electric scissors closes gradually promptly, until the controller detects after hall voltage reaches the second default, controller control motor 1 stops, accomplish the shearing action this moment.

Optionally, the sector 7 is provided with an arc groove, and the arc magnet 712 is detachably connected to the arc groove.

Here, the circular arc magnet 712 can be easily mounted at a correct position relative to the linear hall sensor by forming the circular arc groove in the sector 7.

Referring to fig. 7, optionally, the electric shears further includes a buckle, the buckle includes a buckle body and a top cap 713, two side edges of the arc groove are respectively provided with a first slot group and a second slot group, each of the first slot group and the second slot group includes at least two slots, the slots in the first slot group and the slots in the second slot group are staggered, the slots are matched with the buckle body, and when the buckle body is installed in the slots, the top cap 713 compresses and fixes the arc magnet 712 placed in the arc groove.

The terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or an implicit indication of the number of technical features indicated. Thus, features defined as "first," "second," "third," and "fourth" may explicitly or implicitly include at least one of the features.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.

Claims

1. Electric shears according to the preceding claim, comprising:

a motor (1);

the speed reducer (2), the speed reducer (2) is connected with the motor (1);

the driving gear (3), the said driving gear (3) is set up on the output shaft of the said speed reducer (2);

the cutter holder (4), the said cutter holder (4) is connected with outer casing of the said speed reducer (2);

the rear end of the fixed blade (5) is arranged at the front end of the cutter holder (4);

the rear end of the movable blade (6) is rotatably connected with the front end of the tool apron (4), a sector (7) is further arranged at the rear end of the movable blade (6), the sector (7) is suitable for rotating along with the movable blade (6), an arc rack (711) and an arc magnet (712) are arranged on one side, close to the tool apron (4), of the sector (7), the arc magnet (712) and the arc rack (711) are arranged concentrically, and the arc rack (711) is meshed with the driving gear (3); and

the circuit board (8), the circuit board (8) set up in on blade holder (4), integrated linear hall sensor on the circuit, linear hall sensor with circular arc magnet (712) set up relatively.

2. The electric shears according to claim 1, wherein a containing groove (43) is formed in the position of the tool apron (4) close to the speed reducer (2), and the containing groove (43) is used for containing the driving gear (3).

3. Electric shears according to claim 1, wherein the fixed blade (5) is detachably connected to the holder (4), the movable blade (6) is detachably connected to the holder (4), and the sector (7) is detachably connected to the movable blade (6).

4. Electric shears according to claim 1, wherein a pin (44) is provided at the front end of the blade holder (4), and the fixed blade (5), the movable blade (6) and the segment (7) are all sleeved on the pin (44), wherein the rear end of the fixed blade (5) is further connected to the blade holder (4) by a first fixing pin (54), and the segment (7) is connected to the movable blade (6) by a third fixing pin (74).

5. Electric shears according to claim 4, wherein the fixed blade (5) comprises a first cutting portion (51) and a first nesting portion (52), wherein the first nesting portion (52) is provided with a first extension portion (53), wherein the movable blade (6) comprises a second cutting portion (61) and a second nesting portion (62), wherein the segment (7) comprises a third nesting portion (72) and a segment body portion (71), wherein the third nesting portion (72) is provided with a third extension portion (73), wherein the first nesting portion (52) is nested on the pin (44) and abuts against the holder (4), wherein the first extension portion (53) is connected to the holder (4) by the first fixing pin (54), wherein the second nesting portion (62) is nested on the pin (44) and overlaps onto the first nesting portion (52), the third sleeving part (72) is sleeved on the pin shaft (44) and stacked on the second sleeving part (62), and the third extending part (73) is connected with the second shearing part (61) through the third fixing pin (74).

6. Electric shears according to claim 1, wherein the blade holder (4) is provided with a first recess (41), the circuit board (8) being provided at the first recess (41).

7. Electric shears according to claim 1, wherein the blade holder (4) is provided with a second recess (42), the rear end of the fixed blade (5) being placed in the second recess (42).

8. The electric shears according to claim 1, further comprising a housing and a controller, wherein the housing is of a cylindrical structure, the motor (1), the speed reducer (2), the driving gear (3), the sector (7), the tool holder (4) and the controller are all disposed in the housing, and the motor (1) and the circuit board (8) are respectively electrically connected with the controller.

9. Electric shears according to claim 8, further comprising a trigger (9), wherein the trigger (9) is hinged to the blade holder (4), and wherein the controller is adapted to control the motor (1) to operate upon sensing the trigger (9) being pulled.

10. Electric shears according to any one of claims 1 to 9, wherein said sectors (7) are provided with circular arc grooves in which said circular arc magnets (712) are adapted to be placed;

the electric shears further comprises a buckle, the buckle comprises a buckle body and a top cap (713), a first clamping groove group and a second clamping groove group are respectively formed in two side edges of the arc groove, at least two clamping grooves are respectively formed in the first clamping groove group and the second clamping groove group, the clamping grooves in the first clamping groove group and the clamping grooves in the second clamping groove are arranged in a staggered mode, the clamping grooves are matched with the buckle body, and after the buckle body is installed in the clamping grooves, the top cap (713) compresses and fixes the arc magnets (712) arranged in the arc groove.