CN105500263A - Electric screw driver with adjustable output torque - Google Patents
Electric screw driver with adjustable output torque Download PDFInfo
- Publication number
- CN105500263A CN105500263A CN201511035534.9A CN201511035534A CN105500263A CN 105500263 A CN105500263 A CN 105500263A CN 201511035534 A CN201511035534 A CN 201511035534A CN 105500263 A CN105500263 A CN 105500263A
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- CN
- China
- Prior art keywords
- screw driver
- motor
- stop pin
- electric screw
- output shaft
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- 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
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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
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The invention relates to an electric screw driver with an adjustable output torque. The electric screw driver is characterized in that an adjusting ring is arranged on the front end of a shell; a threaded ring is arranged in the adjusting ring; the front end surface of an annular gear is a rugged torque adjusting surface; a rolling ball which leans against the torque adjusting surface is arranged in the shell; the rolling ball leans against a stop pin; a stop plate is arranged on the front end of the stop pin; a spiral supporting spring is arranged between the stop plate and the threaded ring. According to the electric screw driver disclosed by the invention, the threaded ring is enabled to move by rotating the adjusting ring, and the spiral supporting spring is enabled to be compressed or stretch, so that the purpose of mechanically adjusting a screw driver head among different output twisting forces can be achieved.
Description
Technical field
The present invention relates to a kind of electric tool, particularly a kind of electric screw driver of adjustable output torque.
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 of adjustable output torque.
One aspect of the present invention provides a kind of electric screw driver of adjustable output torque, 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 is provided with in described handle, for the transmission/reception of signal sending/receiving, memory cell, 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 transmission mechanism comprises: the ring gear being arranged on described motor front end, the teeth portion of described ring gear is arranged on the inner ring place of annular, the inside of described ring gear is provided with pinion frame near one end, front of electric screw driver, by some Planetary Gear Transmissions between described ring gear and described pinion frame, described output shaft is connected with pinion frame, the front end of described housing is provided with adjusting ring, threaded collar is provided with in described adjusting ring, the front end face of described ring gear is the torque adjustment face that height rises and falls, the spin abutted with described torque adjustment face is provided with in described housing, described spin and latch abut against, and the front end of described latch is provided with check plate, are provided with spiral support spring between described check plate and described threaded collar, activating described threaded collar by rotating described adjusting ring, making described helical spring be compressed or extend.
Further, the present invention provides a kind of electric screw driver of adjustable output torque on the other hand, it is characterized in that: the rear end of described output shaft is also provided with stop pin, the sidewall of described stop pin arranges groove, described pinion frame is provided with the projection coordinated with described stop pin upper groove, locking circle is had outside described stop pin, in space between described locking circle and described stop pin, self-locking block is set, when described motor quits work, described stop pin, described pinion frame, automatically locks between described self-locking block three.
The invention has the beneficial effects as follows: by rotating adjusting ring actuating thread ring, helical spring is made to be compressed or extend, thus pressure increase between the torque adjustment face making spin and ring gear or reduction, spin becomes the ladder being difficult to or easily crossing between torque adjustment face, thus reaches the object that mechanical adjustment driver bit can adjust between different outputting torsion.When needing larger outputting torsion, regulating adjusting ring that threaded collar is forwards moved, when needing less outputting torsion, regulating adjusting ring that threaded collar is rearward moved.When motor quits work, stop pin, pinion frame, automatically locks between self-locking block three, thus output shaft cannot rotate, and can use as normal screws cutter.
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 of the transmission mechanism of electric screw driver of the present invention.
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.
As shown in Figure 2, described transmission mechanism 4 comprises: the ring gear 6 being arranged on motor 3 front end, the teeth portion of ring gear 6 is arranged on the inner ring place of annular, the inside of ring gear 6 is provided with pinion frame 26 near one end, front of electric screw driver, by the transmission of some planetary gears 28 between ring gear 6 and pinion frame 26, output shaft 12 is connected with pinion frame 26, when motor 3 drives ring gear 6 to rotate, drive the rotation of planetary gear 28 and pinion frame 26, make output shaft 12 synchronous axial system.
The front end of housing 1 is provided with adjusting ring 11, threaded collar 22 is provided with in adjusting ring 11, the front end face of ring gear 6 is the torque adjustment face that height rises and falls, the spin 27 abutted with torque adjustment face is provided with in housing 1, spin and latch 25 abut against, the front end of latch 25 is provided with check plate 24, spiral support spring 21 is provided with between check plate 24 and threaded collar 22, by rotating adjusting ring 11 actuating thread ring 22, helical spring 21 is made to be compressed or extend, thus pressure increase between the torque adjustment face making spin 27 and ring gear 6 or reduction, spin 27 becomes the ladder being difficult to or easily crossing between torque adjustment face, thus reach mechanical adjustment driver bit and can adjust between different outputting torsion.When needing larger outputting torsion, regulating adjusting ring 11 that threaded collar is forwards moved, when needing less outputting torsion, regulating adjusting ring 11 that threaded collar 22 is rearward moved.
The rear end of output shaft 12 is also provided with stop pin 23, the sidewall of stop pin 23 arranges groove, pinion frame 26 is provided with the projection coordinated with stop pin 23 upper groove, has locking circle 8 outside stop pin, in the space between locking circle 8 and stop pin 23, self-locking block 7 is set, when motor 3 quits work, stop pin 23, pinion frame 26, automatically locks between self-locking block 7 three, thus output shaft cannot rotate, can use as normal screws cutter.
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, 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, current limliting configuration switch 508, 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 (2)
1. the electric screw driver of an adjustable output torque, 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 is provided with in described handle, for the transmission/reception of signal sending/receiving, memory cell, 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 transmission mechanism comprises: the ring gear being arranged on described motor front end, the teeth portion of described ring gear is arranged on the inner ring place of annular, the inside of described ring gear is provided with pinion frame near one end, front of electric screw driver, by some Planetary Gear Transmissions between described ring gear and described pinion frame, described output shaft is connected with pinion frame;
The front end of described housing is provided with adjusting ring, threaded collar is provided with in described adjusting ring, the front end face of described ring gear is the torque adjustment face that height rises and falls, the spin abutted with described torque adjustment face is provided with in described housing, described spin and latch abut against, and the front end of described latch is provided with check plate, are provided with spiral support spring between described check plate and described threaded collar, activating described threaded collar by rotating described adjusting ring, making described helical spring be compressed or extend.
2. the electric screw driver of a kind of adjustable output torque as claimed in claim 1, it is characterized in that: the rear end of described output shaft is also provided with stop pin, the sidewall of described stop pin arranges groove, described pinion frame is provided with the projection coordinated with described stop pin upper groove, locking circle is had outside described stop pin, in space between described locking circle and described stop pin, self-locking block is set, when described motor quits work, described stop pin, described pinion frame, automatically locks between described self-locking block three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511035534.9A CN105500263A (en) | 2015-12-31 | 2015-12-31 | Electric screw driver with adjustable output torque |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511035534.9A CN105500263A (en) | 2015-12-31 | 2015-12-31 | Electric screw driver with adjustable output torque |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105500263A true CN105500263A (en) | 2016-04-20 |
Family
ID=55708758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511035534.9A Pending CN105500263A (en) | 2015-12-31 | 2015-12-31 | Electric screw driver with adjustable output torque |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105500263A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018090378A1 (en) * | 2016-11-21 | 2018-05-24 | 胡厚飞 | Quick-turning wrench motor protection method and quick-turning wrench |
| CN112536755A (en) * | 2020-12-04 | 2021-03-23 | 国网山东省电力公司烟台供电公司 | Power transmission and transformation high-voltage electrified bolt fastener capable of remotely controlling torque force |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06182673A (en) * | 1992-12-22 | 1994-07-05 | Matsushita Electric Works Ltd | Fastening torque adjusting mechanism for electric tool |
| JP2001277156A (en) * | 2000-03-31 | 2001-10-09 | Hitachi Koki Co Ltd | Transmission torque adjusting device of power tool |
| JP2002264033A (en) * | 2001-03-02 | 2002-09-18 | Makita Corp | Power tool |
| CN201082531Y (en) * | 2007-09-05 | 2008-07-09 | 张勤业 | Torque regulating device for multi-head electric driller |
| 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 |
-
2015
- 2015-12-31 CN CN201511035534.9A patent/CN105500263A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06182673A (en) * | 1992-12-22 | 1994-07-05 | Matsushita Electric Works Ltd | Fastening torque adjusting mechanism for electric tool |
| JP2001277156A (en) * | 2000-03-31 | 2001-10-09 | Hitachi Koki Co Ltd | Transmission torque adjusting device of power tool |
| JP2002264033A (en) * | 2001-03-02 | 2002-09-18 | Makita Corp | Power tool |
| CN201082531Y (en) * | 2007-09-05 | 2008-07-09 | 张勤业 | Torque regulating device for multi-head electric driller |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018090378A1 (en) * | 2016-11-21 | 2018-05-24 | 胡厚飞 | Quick-turning wrench motor protection method and quick-turning wrench |
| CN112536755A (en) * | 2020-12-04 | 2021-03-23 | 国网山东省电力公司烟台供电公司 | Power transmission and transformation high-voltage electrified bolt fastener capable of remotely controlling torque force |
| CN112536755B (en) * | 2020-12-04 | 2022-11-22 | 国网山东省电力公司烟台供电公司 | Power transmission and transformation high-voltage electrified bolt fastener capable of setting torsion in remote control manner |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160420 |
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| RJ01 | Rejection of invention patent application after publication |