CN218941816U

CN218941816U - Electric tool

Info

Publication number: CN218941816U
Application number: CN202223613741.6U
Authority: CN
Inventors: 丛美姚
Original assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Current assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-05-02
Anticipated expiration: 2032-10-21

Abstract

The utility model discloses an electric tool, comprising: the device comprises a shell, a shearing device, a motor, a control unit and an operation unit, wherein the operation unit is used for adjusting the opening size of the shearing device, the operation unit is at least used for realizing the switching of a gear switching mode and a self-defining mode, and when the device is in the gear switching mode, the control unit controls the shearing device to adjust to the corresponding opening size according to stored motor operation parameters corresponding to different gears; when in the self-defining mode, the user operates the shearing device to the self-defining opening size, and the control unit stores the motor operation parameters corresponding to the self-defining opening size, so that the control unit can control the shearing device to adjust to the self-defining opening size according to the motor operation parameters corresponding to the self-defining opening size. According to the utility model, by setting the custom mode, a user can flexibly change the opening angle according to the size of the branches, a plurality of sensors are not needed for gear limiting, the structure is simple, and the requirements of the user can be met.

Description

Electric tool

[ field of technology ]

The utility model relates to an electric tool, in particular to an electric tool used in occasions such as garden pruning and the like.

[ background Art ]

The electric shears are tools which are driven by the motor to open and close the front end tool bit in a reciprocating manner, are widely applied to pruning operation of branches, replace the traditional manual operation, save time and labor, and greatly improve the working efficiency of users. Existing electric shears have only one or a fixed few opening strokes, i.e. the controller controls the cutter head to open and close at a fixed angle, and basically uses hall sensors as stroke definitions. However, in the actual operation process, the shearing device cannot flexibly change the opening angle according to the size of the branches, and thicker branches cannot be trimmed when the stroke setting is small; when the stroke setting is large, the thinner branches are trimmed, so that the idle stroke is increased, the trimming efficiency is reduced, and the time and the electric quantity are wasted.

Please refer to the chinese patent No. CN216820803U issued 28 at 2022, which discloses that when the travel switch is in the first gear, the maximum open position and the minimum closed position of the shearing device are defined by two hall elements; when the travel switch is in the second gear, the control unit controls the motor to run until the stored preset rotation turns, rotation is stopped, and a plurality of gears are corresponding to a plurality of preset rotation turns, so that setting of more gears is achieved. However, only a few fixed gears are set, the opening setting can not be carried out according to the actual situation of the user, and the user requirements can not be met.

Therefore, it is necessary to design an electric tool that has a simple structure and can satisfy the needs of users to solve the above-mentioned problems.

[ utility model ]

Aiming at the defects of the prior art, the utility model aims to provide an electric tool which has a simple structure and can meet the requirements of users.

The utility model solves the problems in the prior art by adopting the following technical scheme: a power tool, comprising: the electric tool comprises a shell, a shearing device positioned at the front end of the shell, a motor and a control unit, wherein the motor and the control unit are accommodated in the shell, the control unit is electrically connected with the motor, the motor receives instructions of the control unit to drive the shearing device to reciprocate, an operation unit is arranged on the shell and is used for adjusting the opening size of the shearing device, the operation unit is at least used for realizing the switching of a gear switching mode and a self-defining mode, and when the electric tool is in the gear switching mode, the control unit controls the shearing device to be adjusted to the corresponding opening size according to stored motor operation parameters corresponding to different gears; when the electric tool is in a self-defining mode, a user operates the shearing device to the self-defining opening size, and the control unit stores motor operation parameters corresponding to the self-defining opening size, so that the control unit can control the shearing device to adjust to the self-defining opening size according to the motor operation parameters corresponding to the self-defining opening size.

The further improvement scheme is as follows: the operation unit comprises an operation button, a plurality of gears and gear indicator lamps corresponding to the gears.

The further improvement scheme is as follows: the shearing device comprises a movable blade and a static blade, the movable blade is connected with the motor through a transmission device, and the movable blade moves relatively to the static blade in a reciprocating manner.

The further improvement scheme is as follows: when the shearing work is executed, the control unit controls the motor to run at a first rotating speed, and in the self-defining mode, the control unit controls the motor to run at a second rotating speed, wherein the first rotating speed is larger than the second rotating speed.

The further improvement scheme is as follows: the motor operation parameters comprise the rotation number of the motor, the gears correspond to different rotation numbers, and the rotation number is the number of rotations required by the motor from the closed position of the movable blade and the static blade to the final open position of the movable blade and the static blade.

The further improvement scheme is as follows: the motor operating parameters include an opening time of the shearing device, the opening time being a time required from when the moving blade and the stationary blade are in a closed position to when the moving blade and the stationary blade are in a final open position.

The further improvement scheme is as follows: in the custom mode, the control unit stores an opening time for the motor to run at the second rotational speed to a final opening position, and sets the opening time to an opening time for the motor to run at the first rotational speed.

The further improvement scheme is as follows: the electric tool comprises a reminding device, gear switching can be performed by pressing the operation button for a short time, a user-defined mode can be entered by pressing the operation button for a long time, and reminding is performed by the reminding device.

The further improvement scheme is as follows: after the user-defined mode is entered, the operation button is kept to be pressed for a long time, the control unit controls the cutting device to be closed through the motor, controls the cutting device to be opened at the second rotating speed through the motor, loosens the operation button, and stops rotating through the motor.

The further improvement scheme is as follows: the electric tool is an electric scissors.

Compared with the prior art, the utility model has the following beneficial effects: the electric tool comprises an operation unit for adjusting the opening size of the shearing device, wherein the operation unit is at least used for realizing the switching of a gear switching mode and a self-defining mode, and when the electric tool is in the gear switching mode, the control unit controls the shearing device to adjust to the corresponding opening size according to stored motor operation parameters corresponding to different gears; when in the self-defining mode, the user operates the shearing device to the self-defining opening size, the control unit stores motor operation parameters corresponding to the self-defining opening size, so that the control unit can control the shearing device to adjust to the self-defining opening size according to the motor operation parameters corresponding to the self-defining opening size, the user can flexibly change the opening angle size according to the branch size by setting the self-defining mode, and the gear limiting is not needed by a plurality of sensors, so that the structure is simple and the user requirements can be met.

[ description of the drawings ]

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings:

FIG. 1 is a block diagram of a power tool of the present utility model;

FIG. 2 is a cross-sectional view of the power tool of the present utility model;

fig. 3 is a circuit diagram of the power tool of the present utility model.

Meaning of reference numerals in the drawings:

100. the electric tool 1, the shell 2, the battery 3, the shearing device 31, the movable blade 32, the static blade 4, the motor 5, the transmission device 51, the reduction gearbox assembly 52, the sector gear transmission device 53, the magnetic element 6, the control unit 7, the Hall circuit board 8, the trigger switch 9, the operation unit 91, the operation button 92, the gear indicator lamp 10 and the reminding device

[ detailed description ] of the utility model

The utility model will be described in further detail with reference to the drawings and embodiments.

Referring to fig. 1 to 3, an electric tool 100 according to the present utility model is shown, and in this embodiment, the electric tool 100 is an electric scissors, which is widely used in the field of garden trimming and the like. The electric tool 100 includes a housing 1, a battery 2 mounted on the housing 1, a shearing device 3 located at the front end of the housing 1, a motor 4 accommodated in the housing 1, a transmission device 5 and a control unit 6, wherein the motor 4 is connected to the shearing device 3 through the transmission device 5, the control unit 6 is electrically connected to the motor 4, and the motor 4 receives an instruction of the control unit 6 to drive the shearing device 3 to perform reciprocating shearing motion, and in this embodiment, the motor 4 is a brushless dc motor.

The motor 4 is mounted at the rear end of the transmission device 5, and a pinion (not shown) at the front end of an output shaft of the motor 4 is engaged with the transmission device 5. The transmission device 5 comprises a reduction gearbox assembly 51, a sector gear transmission device 52 connected to the reduction gearbox assembly 51 and a magnetic element 53 arranged on the sector gear transmission device 52. The shearing device 3 comprises a movable blade 31 and a static blade 32, the static blade 32 is fixedly connected with the shell 1, one end of the movable blade 31 is connected with the sector gear transmission device 52, the sector gear transmission device 52 drives the movable blade 31 to reciprocate under the rotation of the motor 4, so that the movable blade 31 can reciprocate relatively to the static blade 32, the electric tool 100 further comprises a Hall circuit board 7 positioned near the sector gear transmission device 52, two Hall elements (not shown) are arranged on the Hall circuit board 7, and when the magnetic element 53 of the sector gear transmission device 52 swings to reach the Hall element position, the movable blade 31 reaches the maximum limit position for opening and closing, namely, the movable blade 31 stops when reaching the maximum limit position.

The electric tool 100 further comprises a trigger switch 8 installed on the casing 1 and connected to the control unit 6, and an operation unit 9 located on the casing 1, wherein the trigger switch 8 is pressed to execute a shearing operation, the operation unit 9 is used for adjusting the opening size of the shearing device 3, and the operation unit 9 comprises an operation button 91 connected to the control unit 6, a plurality of gears and a gear indicator 92 corresponding to the gears, and in this embodiment, the electric tool comprises a gear 1, a gear 2, a gear 3 and a gear 4. The operation unit 9 is at least used for realizing the switching of a gear switching mode and a user-defined mode, and when the electric tool 100 is in the gear switching mode, the control unit 6 controls the shearing device 3 to adjust to the corresponding opening size according to the stored motor operation parameters corresponding to different gears; when the electric tool 100 is in the custom mode, the user operates the cutting device 3 to a custom opening size, and the control unit 6 stores the motor operation parameters corresponding to the custom opening size, so that the control unit 6 controls the cutting device 3 to adjust to the custom opening size according to the motor operation parameters corresponding to the custom opening size. When executing the shearing operation, the control unit 6 controls the motor 4 to operate at a first rotation speed, and in the custom mode, the control unit 6 controls the motor 4 to operate at a second rotation speed, wherein the first rotation speed is greater than the second rotation speed, in this embodiment, the first rotation speed is that the control unit 6 drives the motor 4 at a duty ratio of 100%, and the second rotation speed is that the control unit 6 drives the motor 4 at a duty ratio of 30%. The electric tool 100 includes a reminding device 10, the gear can be switched by pressing the operation button 91 for a short time, the user-defined mode can be entered by pressing the operation button 91 for a long time, and the reminding device 10 is used for reminding, in this embodiment, the reminding device 10 includes a buzzer connected to the control unit 6, and of course, in other embodiments, the reminding device 10 may be replaced by an indicator light, a voice prompt, or the like.

In the electric tool 100 according to the first embodiment of the present utility model, the motor operating parameter is the number of rotations of the motor 4, and the plurality of gear positions correspond to different numbers of rotations, and the number of rotations is the number of rotations required by the motor 4 from the closed position of the movable blade 31 and the stationary blade 32 to the final open position of the movable blade 31 and the stationary blade 32. The specific operations include: when the battery 2 is pressed down to switch, the electric tool 100 is powered on, the shearing device 3 is in an initial state, namely a closed state, at the moment, gear selection can be performed by pressing an operation button 91 of the operation unit 9 for a short time, the control unit 6 can circularly switch among the gear 1, the gear 2, the gear 3 and the gear 4 by pressing the operation button 91 for a short time, the trigger switch 8 is buckled twice, the electric tool 100 is unlocked, the trigger switch 8 is buckled again, the control unit 6 controls the motor 4 to rotate with a 100% duty ratio according to the rotation number corresponding to the selected gear, the shearing device 3 is opened to the selected opening gear, and when the trigger switch 8 is buckled again by a user to perform shearing work, the control unit 6 controls the shearing device 3 to be opened to be closed and then opened to the selected opening gear. If the operation button 91 is pressed for a long time, the control unit 6 detects that the on time of the operation button 91 is longer than 2s, at this time, the buzzer sounds for a long time to remind the user to enter the self-defining mode, the control unit 6 controls the cutting device 3 to be closed, and the operation button 91 is still turned on, the control unit 6 controls the motor 4 to operate with a duty cycle of 30% so that the cutting device 3 is opened slowly, when the user releases the operation button 91, the control unit 6 stores the number of turns rotated by the motor 4 when the cutting device 3 is moved from the closed position to the final opening position, and sets, that is, when the user again pulls the trigger switch 8 to execute the cutting operation, the control unit 6 controls the motor 4 to operate with the number of turns from the closed position to open to the self-defining opening size. The user can select the opening size by oneself according to different demands to adapt to the branch of different thickness, and need not to set up a plurality of sensors and carry out spacing, just can realize the settlement of any opening size, simple structure.

The motor operation parameters in the electric tool 100 according to the second embodiment of the present utility model include the opening time of the shearing device 3, which is the time required from the closed position of the movable blade 31 and the stationary blade 32 to the final open position of the movable blade 31 and the stationary blade 32, and in the custom mode, the control unit 6 stores the opening time for the motor 4 to operate at the second rotational speed to the final open position, and sets the opening time to the opening time for the motor 4 to operate at the first rotational speed. The specific operations include: when the battery 2 is pressed down to switch, the electric tool 100 is powered on, the shearing device 3 is in an initial state, namely a closed state, at this time, the gear selection can be performed by pressing the operation button 91 of the operation unit 9 for a short time, the control unit 6 can circularly switch among the gear 1, the gear 2, the gear 3 and the gear 4 by pressing the operation button 91 for a short time, the trigger switch 8 is buckled twice, the electric tool 100 is unlocked, the trigger switch 8 is buckled again, the control unit 6 controls the motor 4 to rotate with a 100% duty ratio according to the opening time corresponding to the selected gear, the shearing device 3 is opened to the selected opening gear, and when the user buckles the trigger switch 8 again to perform shearing work, the control unit 6 controls the shearing device 3 to open to close and then open to the selected opening gear. If the operation button 91 is pressed for a long time, the control unit 6 detects that the on time of the operation button 91 is longer than 2s, at this time, the buzzer sounds for a long time to remind the user to enter the self-defined mode, the control unit 6 controls the cutting device 3 to be closed, and the operation button 91 is still turned on, the control unit 6 controls the motor 4 to operate with a duty ratio of 30% so that the cutting device 3 is opened slowly, when the user releases the operation button 91, the control unit 6 stores the opening time of the motor 4 when the cutting device 3 is moved from the closed position to the final opening position, and sets the opening time to the opening time of the motor 4 to operate with the duty ratio of 100%, that is, when the user pulls the trigger switch 8 again to execute the cutting operation, the control unit 6 controls the motor 4 to operate with the opening time after the setting from the closed position to open to the self-defined opening size. The user can select the opening size by oneself according to different demands to adapt to the branch of different thickness, and need not to set up a plurality of sensors and carry out spacing, just can realize the settlement of any opening size, simple structure.

According to the electric tool 100, the operation unit 9 for adjusting the opening size of the shearing device 3 is arranged, the operation unit 9 is at least used for realizing the switching of a gear switching mode and a self-defined mode, and when the electric tool is in the gear switching mode, the control unit 6 controls the shearing device 3 to adjust to the corresponding opening size according to stored motor operation parameters corresponding to different gears; when in the self-defining mode, the user operates the shearing device 3 to the self-defining opening size, the control unit 6 stores the motor operation parameters corresponding to the self-defining opening size, so that the control unit 6 can control the shearing device 3 to adjust to the self-defining opening size according to the motor operation parameters corresponding to the self-defining opening size, through setting the self-defining mode, the user can flexibly change the opening angle size according to the branch size, and the gear definition is not needed by a plurality of sensors, and the self-defining mechanism is simple in structure and can meet the user requirements.

The present utility model is not limited to the above-described embodiments. Those skilled in the art will readily appreciate that many other alternatives to the power tool of the present utility model are possible without departing from the spirit and scope of the present utility model. The protection scope of the present utility model is subject to the claims.

Claims

1. A power tool, comprising: the device comprises a shell, a shearing device positioned at the front end of the shell, a motor and a control unit, wherein the motor and the control unit are accommodated in the shell, the control unit is electrically connected with the motor, and the motor receives an instruction of the control unit to drive the shearing device to reciprocate; the method is characterized in that: the shell is provided with an operation unit, the operation unit is used for adjusting the opening size of the shearing device, the operation unit is at least used for realizing the switching of a gear switching mode and a self-defined mode, and when the electric tool is in the gear switching mode, the control unit controls the shearing device to be adjusted to the corresponding opening size according to the stored motor operation parameters corresponding to different gears; when the electric tool is in a self-defining mode, a user operates the shearing device to the self-defining opening size, and the control unit stores motor operation parameters corresponding to the self-defining opening size, so that the control unit can control the shearing device to adjust to the self-defining opening size according to the motor operation parameters corresponding to the self-defining opening size.

2. The power tool of claim 1, wherein: the operation unit comprises an operation button, a plurality of gears and gear indicator lamps corresponding to the gears.

3. The power tool of claim 2, wherein: the shearing device comprises a movable blade and a static blade, the movable blade is connected with the motor through a transmission device, and the movable blade moves relatively to the static blade in a reciprocating manner.

4. A power tool according to claim 3, wherein: when the shearing work is executed, the control unit controls the motor to run at a first rotating speed, and in the self-defining mode, the control unit controls the motor to run at a second rotating speed, wherein the first rotating speed is larger than the second rotating speed.

5. The power tool of claim 4, wherein: the motor operation parameters comprise the rotation number of the motor, the gears correspond to different rotation numbers, and the rotation number is the number of rotations required by the motor from the closed position of the movable blade and the static blade to the final open position of the movable blade and the static blade.

6. The power tool of claim 4, wherein: the motor operating parameters include an opening time of the shearing device, the opening time being a time required from when the moving blade and the stationary blade are in a closed position to when the moving blade and the stationary blade are in a final open position.

7. The power tool of claim 6, wherein: in the custom mode, the control unit stores an opening time for the motor to run at the second rotational speed to a final opening position, and sets the opening time to an opening time for the motor to run at the first rotational speed.

8. The power tool according to any one of claims 4 to 7, wherein: the electric tool comprises a reminding device, gear switching can be performed by pressing the operation button for a short time, a user-defined mode can be entered by pressing the operation button for a long time, and reminding is performed by the reminding device.

9. The power tool of claim 8, wherein: after the user-defined mode is entered, the operation button is kept to be pressed for a long time, the control unit controls the cutting device to be closed through the motor, controls the cutting device to be opened at the second rotating speed through the motor, loosens the operation button, and stops rotating through the motor.

10. The power tool of claim 1, wherein: the electric tool is an electric scissors.