CN204651901U - A kind of electric tool - Google Patents
A kind of electric tool Download PDFInfo
- Publication number
- CN204651901U CN204651901U CN201520209289.8U CN201520209289U CN204651901U CN 204651901 U CN204651901 U CN 204651901U CN 201520209289 U CN201520209289 U CN 201520209289U CN 204651901 U CN204651901 U CN 204651901U
- Authority
- CN
- China
- Prior art keywords
- current value
- control device
- electric
- current
- electric tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The utility model relates to a kind of electric tool, this electric tool possesses reversion automatic stop function, this electric tool is moving back under securing member gear (8), after operator triggers main switch (SW1), control device (4) receives from the setting of forward-reverse switch (SW2) and the current value that gathers from current sensing means (10), when motor reversal, the pre-set current value be stored in advance in by described current value and in control device (4) compares, if described current value is less than pre-set current value constantly within a predetermined time, then close power machine supply electric current.Owing to moving back in securing member process in reversion, when securing member departs from surface of the work not yet completely, instrument just can quit work automatically, thus effectively prevents dropping of securing member.
Description
[technical field]
The present invention relates to a kind of electric tool, particularly a kind of possess the electric tool moving back fastener function.
[background technology]
At present, electric tool on the market, as screwdriver, impact wrench etc., when securing member is moved back in reversion, unless operator unclamps trigger, cut off current of electric, just electric tool can stop operating, otherwise electric tool can ceaselessly rotate.Cause like this as a result, because the rotating speed of instrument is usually than very fast, moving back in securing member process, if turn off trigger not in time, securing member is very easy to is unclamped by rotation and drops.Particularly when work high above the ground, when such as operator carries out moving back bolt operation on scaffold, bolt is very easy to drop, the bolt dropped easily is hurted sb.'s feelings from during falling from high altitude, also easily lose, need the bolt etc. more renewed again, this brings a lot of inconvenience to operator simultaneously.
[summary of the invention]
For solving the problem, the invention provides and a kind ofly possess the electric tool moving back securing member automatic stop function.
The invention provides following technical scheme: a kind of electric tool comprises: housing; Be positioned at the motor of described housing, control device; Power supply is connected with described motor, for supplying described current of electric; Forward-reverse switch is connected with described control device, for controlling the direction of rotation of described motor; Current sensing means is connected respectively with described motor and described control device, for detecting described current of electric; Mode selector is connected with described control device, and described mode selector at least possesses and moves back securing member gear; Described move back securing member gear under, described control device have receive arrange from forward-reverse switch signal, be stored in advance in the current value moving back securing member preset in control device and receive the current value that described current sensing means collection provides, when motor reversal, control device by described current value and described be stored in advance in control device preset current value ratio comparatively, if described current value is less than pre-set current value constantly within a predetermined time, then close power machine supply electric current.
Further improved plan has, and described current sensing means is a resistive element.
Further improved plan has, and described motor is brushless electric machine.
Further improved plan has, described mode selector, also comprises a low moment of torsion gear and a high moment of torsion gear.
Further improved plan has, and also comprise the display unit at the exhibition angle place being positioned at housing, described display unit comprises at least two light-emitting diodes, indicates for providing the vision of the multiple different mode of electric tool.
Another technical scheme provided by the invention is: a kind of electric tool, can be used for exiting securing member, and this electric tool comprises: housing; Be positioned at the motor of described housing, control device; Power supply is connected with described motor, for supplying described current of electric; Forward-reverse switch is connected with described control device, for controlling the direction of rotation of described motor; Current sensing means is connected respectively with described motor and described control device, for detecting described current of electric; Described control device has a current value moving back securing member preset and receives the current value provided from described current sensing means collection, when forward-reverse switch is switched to reversion, the current value that current sensing means provides by control device compares with the pre-set current value in control device, if described current value is less than described pre-set current value constantly within a predetermined time, then close power machine supply electric current.
Further improved plan has, and described current sensing means is a resistive element.
Further improved plan has, and described motor is brushless electric machine.
Because instrument moves back in securing member process in reversion, the process of moving back securing member can be judged by current sensing means, and cut off the confession induced current of motor timely, when operator carries out moving back securing member operation, when securing member be inverted unscrew time, electric tool will stop operating automatically, and now securing member can't come off from surface of the work, thus avoid the risk that securing member drops, and can effectively prevent from securing member from unclamping from surface of the work coming off.
[accompanying drawing explanation]
Fig. 1: electric tool schematic diagram of the present invention;
Fig. 2: the mode selector of the first embodiment of the present invention and display unit schematic diagram;
Fig. 3: the circuit block diagram of the first embodiment of the present invention;
Fig. 4: the circuit diagram of the first embodiment of the present invention;
Fig. 5: in prior art, when electric tool moves back securing member, current curve schematic diagram;
Fig. 6: when electric tool of the present invention moves back securing member, current curve schematic diagram;
Fig. 7: the circuit block diagram of the second embodiment of the present invention;
Fig. 8: the circuit diagram of the second embodiment of the present invention.
[embodiment]
Below in conjunction with accompanying drawing, specific description is done to embodiments of the invention.
Embodiment one:
With reference to accompanying drawing 1 and the electric tool shown in accompanying drawing 3, this electric tool mainly comprises housing 1, is positioned at the motor (not shown) of housing, by motor-driven working head 2, the power brick 3 as power supply be connected with tool body, control main switch SW1 and a controller MCU4 of electric motor starting/stopping, controller MCU4 can receive the signal of main switch SW1, forward-reverse switch SW2, mode selection switch SW3 and current detecting unit 10, and control motor performs corresponding action accordingly.
With reference to shown in accompanying drawing 3 and accompanying drawing 4, this electric tool has three kinds of operation range, low moment of torsion gear 6, high moment of torsion gear 7 and move back securing member gear 8.Operator is by the mode selection switch SW3 of pressing mode selector 9, can switch between three kinds of operation range, by the LED of display unit 13, operator can know its operation range selected, described display unit 13 is arranged on exhibition angle 12 place of tool body handle.Such as, when operator selectes low moment of torsion gear 6, the indicator light LED1 of the display unit 13 of its correspondence is luminous; During selected high moment of torsion gear 7, the display unit 13 indicator light LED2 of its correspondence is luminous; Selected when moving back securing member gear 8, the indicator light LED3 of its corresponding display unit 13 is luminous.
Low moment of torsion gear 6 or high moment of torsion gear 7 times, after operator triggers main switch SW1, for brushless electric machine (not shown), brushless electric machine starts to rotate under the driving of drive circuit 11, and controller MCU4 regulates rotating speed and the moment of torsion of described brushless electric machine by the duty ratio of regulation output electric current.And under this gear, unless main switch SW1 disconnects or power brick 3 electric energy exhausts, otherwise brushless electric machine can continue to drive working head 2 to export.
Moving back securing member gear 8 times, after operator triggers main switch SW1, brushless electric machine starts to rotate under the driving of drive circuit 11, if when forward-reverse switch SW2 is in forward position, controller MCU4 regulates rotating speed and the moment of torsion of brushless electric machine by the duty ratio of regulation output electric current.If when forward-reverse switch SW2 is in backward position, current detecting unit 10 detects current of electric, controller MCU4 receives the motor current value of described detection, and it is compared with pre-set current value, if described motor current value is less than pre-set current value within the predetermined time constantly, controller MCU4 then cuts off motor power, and electric tool stops operating.Wherein, described predetermined time is kept in controller MCU4 in advance, and preferably, this predetermined time is less than 1s; Described pre-set current value is move back the motor current value in securing member process, and is stored in advance in controller MCU4, and described current detecting unit 10 can be a current sampling resistor R1.
Moving back in securing member operation, motor working current curve of the prior art as shown in Figure 5, press by main switch, current of electric becomes large gradually, along with securing member is unscrewed gradually, current of electric declines gradually, when securing member is screwed out completely, when leaving workpiece, motor working current is almost close to no-load current value, and operator cuts off main switch when t2, and current of electric declines fast, the vanishing when t3, instrument stops operating.Compared with prior art, electric tool of the present invention is moving back the motor working current curve in securing member process as shown in Figure 6, main switch SW1 presses, current of electric becomes large gradually, and along with securing member is unscrewed gradually, current of electric diminishes gradually, when current of electric within the predetermined time, in t1 to the t2 time period as shown in Figure 5, when being less than pre-set current value constantly, t1 to the t2 time period is less than 1s.Securing member now is not yet back-outed completely and is left surface of the work, controller MCU4 has just cut off current of electric, electric current declines fast, in t3 time vanishing, thus cause electric tool securing member do not unscrewed completely leave surface of the work before stops work.Wherein pre-set current value is a value being greater than empty load of motor current value, is preferably set to 5 times of empty load of motor current value to 8 times.
Embodiment two:
Shown in accompanying drawing 7 and accompanying drawing 8, compared with embodiment one, in embodiment two, electric tool does not have mode selector and display unit, and other are substantially identical with embodiment one.Operator triggers main switch SW1 and connects motor power, controller MCU14 receives main switch SW1, the signal of forward-reverse switch SW2, if when forward-reverse switch SW2 is in forward position, controller MCU14 regulates output torque and the rotating speed of brushless electric machine by the duty ratio of regulation output electric current, if when forward-reverse switch SW2 is in backward position, controller MCU14 receives the sampled current value from current detecting unit 20, and this current value is compared with the pre-set current value be pre-existing in controller MCU14, if described motor current value is less than pre-set current value within the predetermined time constantly, controller MCU14 then cuts off brushless electric machine power supply, electric tool just stops operating.Described current detecting unit 20 can be a current sampling resistor R1.Reversing the current curve moving back securing member can with reference to accompanying drawing 6.Wherein predetermined time is stored in advance in described controller MCU14, and preferred predetermined time is less than 1s.Described pre-set current value moves back the motor current value in securing member process, and be stored in advance in described controller MCU14, is a value being greater than empty load of motor current value, is preferably set to 5 times of empty load of motor current value to 8 times.
Claims (8)
1. an electric tool, comprising:
Housing (1); Be positioned at the motor of described housing, control device (4); Power supply is connected with described motor, for supplying described current of electric; Forward-reverse switch (SW2) is connected with described control device (4), for controlling the direction of rotation of described motor; Current sensing means (10) is connected respectively with described motor and described control device (4), for detecting described current of electric; Mode selector (9) is connected with described control device (4), and described mode selector at least possesses and moves back securing member gear (8);
It is characterized in that: described move back securing member gear (8) under, described control device (4) has the signal receiving and arrange from forward-reverse switch (SW2), be stored in advance in a current value moving back securing member preset in control device (4) and receive the current value that described current sensing means (10) collection provides, when motor reversal, control device (4) by described current value and described be stored in advance in control device (4) preset current value ratio comparatively, if described current value is less than pre-set current value constantly within a predetermined time, then close power machine supply electric current.
2. electric tool according to claim 1, is characterized in that, described current sensing means is a resistive element (R1).
3. electric tool according to claim 2, is characterized in that, described motor is brushless electric machine.
4. the electric tool according to any one in claims 1 to 3, is characterized in that, described mode selector (9), also comprises a low moment of torsion gear (6) and a high moment of torsion gear (7).
5. electric tool according to claim 4, it is characterized in that, also comprise the display unit (13) at the exhibition angle place (12) being positioned at housing, described display unit comprises at least two light-emitting diodes (LED), indicates for providing the vision of the multiple different mode of electric tool.
6. an electric tool, can be used for exiting securing member, and this electric tool comprises:
Housing (1); Be positioned at the motor of described housing, control device (4); Power supply is connected with described motor, for supplying described current of electric; Forward-reverse switch (SW2) is connected with described control device (4), for controlling the direction of rotation of described motor; Current sensing means (20) is connected respectively with described motor and described control device (4), for detecting described current of electric;
It is characterized in that: described control device (14) has a current value moving back securing member preset and receives the current value provided from described current sensing means (20) collection, when forward-reverse switch is switched to reversion, the current value that current sensing means (20) provides by control device (14) compares with the pre-set current value in control device (14), if described current value is less than described pre-set current value constantly within a predetermined time, then close power machine supply electric current.
7. electric tool according to claim 6, is characterized in that, described current sensing means (20) is a resistive element R1.
8. electric tool according to claim 7, is characterized in that, described motor is brushless electric machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520209289.8U CN204651901U (en) | 2015-04-08 | 2015-04-08 | A kind of electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520209289.8U CN204651901U (en) | 2015-04-08 | 2015-04-08 | A kind of electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204651901U true CN204651901U (en) | 2015-09-16 |
Family
ID=54104611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520209289.8U Withdrawn - After Issue CN204651901U (en) | 2015-04-08 | 2015-04-08 | A kind of electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204651901U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795795A (en) * | 2015-04-08 | 2015-07-22 | 江苏东成机电工具有限公司 | Electric tool |
| CN108326802A (en) * | 2018-04-07 | 2018-07-27 | 江苏东成机电工具有限公司 | A kind of electric tool |
| WO2024046498A1 (en) * | 2022-08-30 | 2024-03-07 | 江苏东成工具科技有限公司 | Electric tool and control method |
-
2015
- 2015-04-08 CN CN201520209289.8U patent/CN204651901U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795795A (en) * | 2015-04-08 | 2015-07-22 | 江苏东成机电工具有限公司 | Electric tool |
| CN104795795B (en) * | 2015-04-08 | 2017-06-20 | 江苏东成机电工具有限公司 | A kind of electric tool |
| CN108326802A (en) * | 2018-04-07 | 2018-07-27 | 江苏东成机电工具有限公司 | A kind of electric tool |
| CN108326802B (en) * | 2018-04-07 | 2024-07-23 | 江苏东成机电工具有限公司 | Electric tool |
| WO2024046498A1 (en) * | 2022-08-30 | 2024-03-07 | 江苏东成工具科技有限公司 | Electric tool and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9707671B2 (en) | Electric tool and controlling method thereof | |
| JP5550218B2 (en) | Electric tool | |
| US7331406B2 (en) | Apparatus for controlling a fastener driving tool, with user-adjustable torque limiting control | |
| EP2617528A2 (en) | Rotary tool | |
| JP6250956B2 (en) | Power tool with multiple operating modes | |
| US10903765B2 (en) | Programmable power tool with brushless DC motor | |
| CN104656549B (en) | The control method of electric tool and system, electric tool | |
| CN104795795A (en) | Electric tool | |
| CN204651901U (en) | A kind of electric tool | |
| CN108698219B (en) | Application-optimized cut-off behavior of an electronic slip clutch | |
| CN103358289B (en) | Electric hand tool and control method thereof | |
| CN103368480B (en) | Electric hand tool and control method thereof | |
| DE102006016448A1 (en) | Electric machine tool and method of operating the same | |
| JP2017087412A (en) | Electric work machine | |
| US20230321796A1 (en) | Power tool with sheet metal fastener mode | |
| CN109842331A (en) | Electric tool | |
| US11065754B2 (en) | Electric power tool configured to operate in a normal mode with a specific stage, and in a measurement mode with a common stage | |
| CN104723290B (en) | Control device and control method for torsion output of electric tool | |
| WO2024046498A1 (en) | Electric tool and control method | |
| US11541526B2 (en) | Hand-held power tool having an electronically commutated motor | |
| JP2006062065A (en) | Method and device for controlling screw-fastening in electric rotating tool | |
| CN205685278U (en) | Power tool | |
| US20230030692A1 (en) | Blind rivet nut-setting tool | |
| CN1310417C (en) | Controller for motor driving unit | |
| CN115135459A (en) | Method for operating a hand-held power tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150916 Effective date of abandoning: 20170620 |