CN105563401A - Electric screwdriver provided with circuit protection unit storage batteries - Google Patents
Electric screwdriver provided with circuit protection unit storage batteries Download PDFInfo
- Publication number
- CN105563401A CN105563401A CN201511035527.9A CN201511035527A CN105563401A CN 105563401 A CN105563401 A CN 105563401A CN 201511035527 A CN201511035527 A CN 201511035527A CN 105563401 A CN105563401 A CN 105563401A
- Authority
- CN
- China
- Prior art keywords
- control unit
- screw driver
- electric screw
- battery
- transmission
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0811—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for dc motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
- H02H7/0854—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load responsive to rate of change of current, couple or speed, e.g. anti-kickback protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to an electric screwdriver provided with circuit protection unit storage batteries. The electric screwdriver is provided with a shell and a handle. A motor is installed in the shell. An output shaft is arranged at the front end of the shell. The output shaft is connected with the motor through a transmission mechanism. A screwdriver bit insertion hole is formed in the front end of the output shaft. A storage battery pack is arranged below the handle. The storage battery pack comprises a plurality of storage battery pack battery units. A protection unit is connected with each storage battery pack battery unit in parallel through a branch circuit. The storage battery pack is connected with a control unit in the electric screwdriver through two charging contacts. The storage battery pack is also provided with a monitoring contact. The control unit makes contact with the monitoring contact so as to detect the state of a thermistor. The protection unit in the storage battery pack can cut off a feed wire of the thermistor when recognizing the fault state of the storage batteries.
Description
Technical field
The present invention relates to a kind of electric tool, particularly a kind of electric screw driver with circuit protection unit battery.
Background technology
Electric screw driver is a kind of hand tools, generally has shell and is arranged on the screwdriver on output shaft.Be widely used in industry and household field, be generally used for installing or removing threaded fastener, moment of torsion or rotation are applied to workpiece.
Existing electric screw driver comprises housing, arranges motor wherein, and housing as the position that operator grips, is equipped with screwdriver in the front end of housing, battery drive motors simultaneously, and motor drives screwdriver to rotate by drive disk assembly.But existing electric screw driver also exists many defects, as poor in battery endurance quality, often need maintaining, in the course of work, motor oscillating is violent, seriously expend the muscle power of operator, time fastening, motor screwdriver easily blocks, and makes motor there is the danger of transshipping and causing motor damage.
Summary of the invention
Based on above-mentioned deficiency, invention has been further investigation, develop a kind of electric screw driver.
One aspect of the present invention provides a kind of electric screw driver with circuit protection unit battery, there is housing, handle, in described housing, motor is installed, the front end of described housing is provided with output shaft, described output shaft is connected by transmission mechanism with described motor, the front end of described output shaft is provided with driver bit jack, the driver bit of different model can be installed in described driver bit jack, control unit memory cell is provided with in described handle, charging socket, the switch that is connected is carried out by described control unit with described motor, the charging socket be connected with the batteries below described handle, batteries is provided with below described handle, by electric motor starting and stopping described in described switch control rule, be connected with extraneous power supply by described charging socket, described batteries comprises multiple battery cell, protected location forms in parallel by shunt circuit with each in these battery cell, described batteries is connected with the described control unit in electric screw driver by two charging contacts, described batteries also has supervision contact, described control unit and supervision contact, detect the state of thermistor, protected location in described batteries interrupts the feed wire of thermistor when can identify the malfunction of battery.
The present invention provides a kind of electric screw driver with circuit protection unit battery on the other hand, and described control unit, according to the fault signal type stored in corresponding stored unit, interrupts the electric current of battery or sends corresponding alarm signal.
The present invention provides a kind of electric screw driver with circuit protection unit battery on the other hand; when described batteries internal temperature raises; the resistance value of thermistor reduces; the limiting value preset in resistance is lower than memory cell, described control unit interrupts the electric current of battery or sends alarm signal.
The present invention provides a kind of electric screw driver with circuit protection unit battery on the other hand, described electric screw driver have one external, by the key of operator with legal authorization, this key has transmission/reception, communicate with the transmission/reception of electric screw driver, the transmission/reception of electric screw driver is connected with described control unit, described control unit is when the pre-conditioned or default time interval, by the transmission/reception of electric screw driver, the authorization code request signal stored in described memory cell is sent, be activated after the transmission/reception of external key receives authorization code request signal, mode of operation is converted to from sleep pattern, then the transmission/reception of external key sends to the transmission/reception of electric screw driver the authorization code signal preset, this authorization code signal is sent to described control unit, compare with the presupposed information be stored in described memory cell, if authorization code signal is correct, then described control unit by the unlatching of switch or shutdown signal normally to motor transmission, if authorization code signal is incorrect or do not receive authorization code signal, the then signal that transmits to motor of described control unit roof-cut resistence, electric screw driver is kept to be in blocking.
Accompanying drawing explanation
Accompanying drawing 1 is the overall system structure schematic diagram of electric screw driver of the present invention.
Accompanying drawing 2 is structural representations that the battery of electric screw driver of the present invention is connected with control unit.
Accompanying drawing 3 is structural representations of the control circuit of electric screw driver of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further described, but does not limit the invention to these detailed description of the invention.One skilled in the art would recognize that all alternatives, improvement project and the equivalents that present invention encompasses and may comprise in Claims scope.
Embodiment 1
As shown in Figure 1, the invention provides a kind of electric screw driver, there is housing 1, handle 2, motor 3 is installed in housing 1, housing 1 front end is provided with output shaft 12, output shaft 12 is connected by transmission mechanism 4 with motor 3, and the front end of output shaft 12 is provided with driver bit jack, can install the driver bit 16 of different model in driver bit jack.
Control unit 19 is provided with in handle 2, for the transmission/reception 50 of signal sending/receiving, memory cell 51, charging socket 52, carries out the switch 17 that is connected, the charging socket 42 be connected with the batteries 18 below handle 2 with motor 3 by control unit 19, batteries 18 is provided with below handle 2, control motor 3 by switch 17 to start and stop, being connected with extraneous power supply by charging socket 12, can charge to batteries 18.
Embodiment 2
On the basis of embodiment 1, as shown in Figure 1, electric screw driver of the present invention has control unit 19, switch 17 is by the signal Input Control Element 19 opened or cut out, there is memory cell 51 simultaneously, store electric screw driver in memory cell 51 and run relevant data, and have authorize in advance information or data, control unit 19 can read and stored in data from memory cell 51.
Have one external, by the key 150 of operator with legal authorization, this key 150 schematically represents in the accompanying drawings, and this key 150 has transmission/reception, and preferably there is wireless and interface that is remote action, as typical optical infrared interface or radio.Communicated with the transmission/reception 50 of electric screw driver by above-mentioned interface, the transmission/reception 50 of electric screw driver is connected with control unit 19.
Control unit 19 is when the pre-conditioned or default time interval, by the transmission/reception 50 of electric screw driver, the authorization code request signal stored in memory cell 51 is sent, be activated after the transmission/reception of external key 150 receives authorization code request signal, mode of operation is converted to from sleep pattern, then the transmission/reception of external key sends to the transmission/reception 50 of electric screw driver the authorization code signal preset, this authorization code signal is sent to control unit 19, compare with the presupposed information be stored in memory cell 51, if authorization code signal is correct, then the unlatching of switch 17 or shutdown signal normally transmit to motor 3 by control unit 19, if authorization code signal is incorrect or do not receive authorization code signal, the then signal that transmits to motor 3 of control unit 19 roof-cut resistence 17, electric screw driver is kept to be in blocking.
So cannot carry out normal operating when electric screw driver is stolen, or when being used by the operator of with no authorized, during as held by children, can not maloperation be produced.
Embodiment 3
On the basis of embodiment 1 and 2, during the charging and discharging of battery, can by the parameter of monitoring battery, as the characteristic curve of the voltage of battery, current strength, temperature and above-mentioned parameter and practice, and the detection failure state of corresponding setting limiting value, thus warning message can be provided to the operator of battery or electric screw driver.
As shown in Figure 2, the protected location 180 in the batteries 18 of electric screw driver of the present invention interrupts the feed wire 183 of thermistor when can identify the malfunction of battery.
Batteries 18 comprises multiple battery cell; protected location 180 forms in parallel by shunt circuit with each in these battery cell; batteries 18 is connected with the control unit 19 in charger/electric screw driver by two charging contacts; batteries 18 also has supervision contact 181; control unit 19 contacts with supervision contact 181, detects the state of thermistor 184.
Batteries 18 comprises protected location 180; by the switch in feed wire and thermistor 184 acting in conjunction; thermistor 184 is configured to the temperature sensor irrelevant with protected location 180; if protected location 180 identifies battery and breaks down, then the feed wire of thermistor 184 is interrupted.Control unit 19, according to the fault signal type stored in corresponding stored unit, interrupts the electric current of battery or sends corresponding alarm signal.
When batteries 18 internal temperature raises, the resistance value of thermistor 184 reduces, and the limiting value preset in resistance is lower than memory cell, control unit 19 interrupts the electric current of battery or sends alarm signal.
Embodiment 4
On the basis of embodiment 1-3, in order to the torque output of further fine adjustment electric screw driver, the control circuit of electric screw driver of the present invention is optimized further.
As shown in Figure 3, control circuit 70 has control unit 19, electronic switch 171, switch 17, memory cell 50, first current threshold setup unit 64, current limiter 503, current detection module 505, voltage detection module 501, motor speed sensor 502.
Motor 3 is connected with batteries 18 with by electronic switch 171, and electronic switch 171 passes through current limiter 503 in being connected with control unit 19.
Because motor speed N is relevant with electric moter voltage and current of electric I, and when load increases, current of electric I also increases accordingly, if need maintain motor speed N, then needs to increase corresponding electric moter voltage.Therefore motor speed N can be obtained according to the current of electric I of detecting and electric moter voltage, and by regulating current limliting configuration switch 508 to regulate the electric current of setting current limiter 503 by value, setting motor speed predetermined maximum N1.
Rotating speed predetermined value N1 is stored in memory cell 50, current detection module 505 detects current of electric, and voltage detection module 501 detects the output voltage of batteries, control unit 19 and calculates according to the current of electric of motor speed predetermined maximum N1 and detecting and maintain magnitude of voltage needed for rotating speed predetermined maximum N1 and current value.Control unit 19 with the magnitude of voltage calculated for reference voltage.Voltage detection module 501 detects in real time the virtual voltage of motor 3, and control unit 19 is according to the drive singal of the virtual voltage detected with the difference regulation output of reference voltage, thus maintenance motor speed.
Drive singal is pulse-width signal, if when the virtual voltage of motor 3 exceedes reference voltage, control unit 19 reduces the dutycycle of drive singal; If when the virtual voltage of motor 3 is less than reference voltage, control unit 19 increases the dutycycle of drive singal.
According to the signal of motor speed sensor 502, if motor speed is less than rotating speed predetermined maximum N1, control unit 19 detects current of electric in real time by current detection module 505, and the current value ratio that the current value current of electric of detecting and calculating needed and current limliting configuration switch 508 set comparatively, make current limiter 503 regulate current of electric to be calculate the higher value in the current value of current value and current limliting configuration switch 508 setting needed, and the higher value of this current value can not be greater than the current threshold stored in advance in memory cell 50.If motor speed is greater than rotating speed predetermined maximum N1, control unit 19 detects current of electric in real time by current detection module 505, and the current value ratio that the current value current of electric of detecting and calculating needed and current limliting configuration switch 508 set comparatively, current limiter 503 is made to regulate current of electric to be calculate the smaller value in the current value of current value and current limliting configuration switch 508 setting needed.If motor speed sensor 502 sends to the signal value of control unit to suddenly change; control unit 19 judges according to the change of Current Voltage parameter in current time interval and in last setting-up time interval; as 1s or the 3s time; the motor speed that motor speed sensor 502 detects reduces to 0; and current detection module 505, voltage detection module 501 still detect that signal exports; then control unit 19 judges that electric screw driver is stuck, and controls motor 3 and shuts down, prevent motor from being burnt.
Above-mentioned specific embodiment is schematically illustrating content of the present invention just, do not represent the restriction to content of the present invention.It may occur to persons skilled in the art that, in the present invention, electric screw driver concrete structure can have a lot of versions, but the technical characteristics of the used technical solution and the present invention same or similar, all should be covered by scope.
Claims (4)
1. one kind has the electric screw driver of circuit protection unit battery, there is housing, handle, in described housing, motor is installed, the front end of described housing is provided with output shaft, described output shaft is connected by transmission mechanism with described motor, the front end of described output shaft is provided with driver bit jack, the driver bit of different model can be installed in described driver bit jack, control unit memory cell is provided with in described handle, charging socket, the switch that is connected is carried out by described control unit with described motor, the charging socket be connected with the batteries below described handle, batteries is provided with below described handle, by electric motor starting and stopping described in described switch control rule, be connected with extraneous power supply by described charging socket, it is characterized in that:
Described batteries comprises multiple battery cell; protected location forms in parallel by shunt circuit with each in these battery cell; described batteries is connected with the described control unit in electric screw driver by two charging contacts; described batteries also has supervision contact; described control unit and supervision contact; detect the state of thermistor, when the protected location in described batteries can identify the malfunction of battery, interrupt the feed wire of thermistor.
2. a kind of electric screw driver with circuit protection unit battery as claimed in claim 1; it is characterized in that: described control unit, according to the fault signal type stored in corresponding stored unit, interrupts the electric current of battery or sends corresponding alarm signal.
3. a kind of electric screw driver with circuit protection unit battery as claimed in claim 1; it is characterized in that: when described batteries internal temperature raises; the resistance value of thermistor reduces; the limiting value preset in resistance is lower than memory cell, described control unit interrupts the electric current of battery or sends alarm signal.
4. a kind of electric screw driver with circuit protection unit battery as claimed in claim 1, is characterized in that:
Described electric screw driver have one external, by the key of operator with legal authorization, this key has transmission/reception, communicate with the transmission/reception of electric screw driver, the transmission/reception of electric screw driver is connected with described control unit, described control unit is when the pre-conditioned or default time interval, by the transmission/reception of electric screw driver, the authorization code request signal stored in described memory cell is sent, be activated after the transmission/reception of external key receives authorization code request signal, mode of operation is converted to from sleep pattern, then the transmission/reception of external key sends to the transmission/reception of electric screw driver the authorization code signal preset, this authorization code signal is sent to described control unit, compare with the presupposed information be stored in described memory cell, if authorization code signal is correct, then described control unit by the unlatching of switch or shutdown signal normally to motor transmission, if authorization code signal is incorrect or do not receive authorization code signal, the then signal that transmits to motor of described control unit roof-cut resistence, electric screw driver is kept to be in blocking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511035527.9A CN105563401A (en) | 2015-12-31 | 2015-12-31 | Electric screwdriver provided with circuit protection unit storage batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511035527.9A CN105563401A (en) | 2015-12-31 | 2015-12-31 | Electric screwdriver provided with circuit protection unit storage batteries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105563401A true CN105563401A (en) | 2016-05-11 |
Family
ID=55874311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511035527.9A Pending CN105563401A (en) | 2015-12-31 | 2015-12-31 | Electric screwdriver provided with circuit protection unit storage batteries |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105563401A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI803830B (en) * | 2020-02-28 | 2023-06-01 | 美商施耐寶公司 | Method and system of using usb user interface in electronic torque wrench |
| US11797469B2 (en) | 2013-05-07 | 2023-10-24 | Snap-On Incorporated | Method and system of using USB user interface in electronic torque wrench |
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| CN101055985A (en) * | 2006-04-04 | 2007-10-17 | 梅塔波沃克有限公司 | Battery pack for electric hand-held power tool |
| CN101305404A (en) * | 2005-11-18 | 2008-11-12 | 梅塔波沃克有限公司 | Hand-held electric tool and battery set for the same |
| CN102057405A (en) * | 2008-06-04 | 2011-05-11 | 霍弗·霍斯贝克及弗斯特两合公司 | Mobile identification transmitter of a security system |
| CN201940944U (en) * | 2011-01-25 | 2011-08-24 | 慈溪市宏冠电动工具有限公司 | Rotating type electric screw driver |
| CN103368480A (en) * | 2012-03-31 | 2013-10-23 | 苏州宝时得电动工具有限公司 | Handheld electric-driven tool and control method thereof |
| US20140008090A1 (en) * | 2011-03-31 | 2014-01-09 | Ingersoll-Rand Company | Handheld Power Tools with Triggers and Methods for Assembling Same |
-
2015
- 2015-12-31 CN CN201511035527.9A patent/CN105563401A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190273A (en) * | 1997-02-06 | 1998-08-12 | 谢建平 | Rechargeable battery block |
| CN101305404A (en) * | 2005-11-18 | 2008-11-12 | 梅塔波沃克有限公司 | Hand-held electric tool and battery set for the same |
| CN101055985A (en) * | 2006-04-04 | 2007-10-17 | 梅塔波沃克有限公司 | Battery pack for electric hand-held power tool |
| CN102057405A (en) * | 2008-06-04 | 2011-05-11 | 霍弗·霍斯贝克及弗斯特两合公司 | Mobile identification transmitter of a security system |
| CN201940944U (en) * | 2011-01-25 | 2011-08-24 | 慈溪市宏冠电动工具有限公司 | Rotating type electric screw driver |
| US20140008090A1 (en) * | 2011-03-31 | 2014-01-09 | Ingersoll-Rand Company | Handheld Power Tools with Triggers and Methods for Assembling Same |
| CN103368480A (en) * | 2012-03-31 | 2013-10-23 | 苏州宝时得电动工具有限公司 | Handheld electric-driven tool and control method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11797469B2 (en) | 2013-05-07 | 2023-10-24 | Snap-On Incorporated | Method and system of using USB user interface in electronic torque wrench |
| TWI803830B (en) * | 2020-02-28 | 2023-06-01 | 美商施耐寶公司 | Method and system of using usb user interface in electronic torque wrench |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160511 |