CN102501208A - Alternating-current electric wrench - Google Patents
Alternating-current electric wrench Download PDFInfo
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- CN102501208A CN102501208A CN2011102938198A CN201110293819A CN102501208A CN 102501208 A CN102501208 A CN 102501208A CN 2011102938198 A CN2011102938198 A CN 2011102938198A CN 201110293819 A CN201110293819 A CN 201110293819A CN 102501208 A CN102501208 A CN 102501208A
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Abstract
The invention discloses an alternating-current electric wrench, which comprises a shell, a power unit, a universal motor, an ordinary gear train speed reducer, a planetary gear train speed reducer, a wrench body, a sensor, an information processor and a display device. The universal motor is disposed in the shell and connected with the power unit, the ordinary gear train speed reducer is driven by the universal motor and connected to the shell, and the wrench body is connected with the planetary gear train speed reducer which is driven by the ordinary gear train speed reducer. The sensor is used for measuring rotating speed of the universal motor, the information processor comprises a torque computing module, a memory module and a control module, the torque computing module is connected with the sensor and the display module, the memory module is provided with a preset reference current value, the control module is used for measuring a practical current value of the universal motor and comparing the practical current value with the reference current value, and the control module controls the universal motor to stop rotating when the practical current value is larger than the reference current value. The alternating-current electric wrench is capable of providing larger torsion, and the torque value can be set according to mounting requirements.
Description
Technical field
The present invention relates to the assembly tool field, relate to a kind of AC electrical spanner more specifically.
Background technology
Along with the continuous development of China's industry, the assembly tool field is just towards lighting, automation direction development.Spanner is a kind of requisite assembly tool as the instrument of tightening or unscrew bolt in every profession and trades such as the vehicles, engineering machinery, electric power maintenance.
Spanner of the prior art mainly is divided into three kinds: a kind of for manpower does not have the spanner that the moment of torsion data show, and the spanner that another kind has the moment of torsion data to show for manpower, another is the spanner that pneumatic no moment of torsion shows.Because the restriction of people self strength, the manual power wrench can only be applied in the work that the torque value requirement is 1-200Nm, and pneumatic impact spanner also only can be applicable to the work that the torque value requirement is 1-500Nm.When installation need be than high pulling torque, manual power wrench and pneumatic impact spanner can not satisfy the requirement of installation to high pulling torque.
In addition, manual power wrench of the prior art and pneumatic impact spanner all can not be provided with moment of torsion.Yet, often require the pretightning force of a plurality of bolts to equate in the installation process, to guarantee workpiece stress equalization is installed.Because manual power wrench of the prior art and pneumatic impact spanner can not be provided with torque value, so its power of screwing that can not guarantee a plurality of bolts is identical.
Therefore, how a kind of high pulling torque spanner is provided, can sets the corresponding torque value, become those skilled in the art's important technological problems to be solved according to installation requirement.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of AC electrical spanner, it can provide bigger torsional forces, and can set the corresponding torque value according to installation requirement.
Technical scheme provided by the invention is described below:
A kind of AC electrical spanner provided by the invention comprises: housing, supply unit, be arranged at the inside of said housing and be connected with said supply unit scurry sharp motor, by said epicyclic train deceleration device of scurrying the ordinary gear train deceleration device that swashs driven by motor and be connected in said housing, driving by said ordinary gear train deceleration device and the wrench body that is connected with said epicyclic train deceleration device; Said epicyclic train deceleration device comprises through first rotating shaft and is connected in central gear and a plurality of planetary gear that is meshed with said central gear through tooth rest on the said housing; Said first rotating shaft is installed with the fluted disc that is meshed with the end wheel of said ordinary gear train deceleration device, and said wrench body is connected with a plurality of said planetary axle center; Said AC electrical spanner also comprises and is used to measure said sensor, information processor and the display unit that swashs rotating speed of motor of scurrying; Said information processor comprises and said sensor and the torque arithmetic module that is connected with said display unit, the control module that is preset with the memory module of reference current value and is used to measure said actual current value of scurrying sharp motor and said actual current value and said reference current value are made comparisons; When said actual current value during greater than said reference current value, control module control is said scurries and swashs motor and stop operating.
Preferably, said ordinary gear train deceleration device comprises through second rotating shaft and is connected in first group of gear of said housing and is connected in second group of gear of said housing through the 3rd rotating shaft; The said power output shaft that swashs motor of scurrying is provided with external tooth; Said first group of gear comprises that the first gear that is meshed with said external tooth reaches and coaxial first pinion that links to each other of said first gear; Said second group of gear comprises that the second largest gear that is meshed with said first pinion reaches and coaxial second pinion that links to each other of said second largest gear, and said second pinion is meshed with said fluted disc.
Preferably, said wrench body is connected with a plurality of said planetary axle center through moving block, and said moving block is connected through bearing pin with a plurality of said planetary axle center respectively, and said wrench body is connected in the centre of gyration of said moving block.
Preferably; Said planetary gear is for many groups of distributing vertically and respectively to organize said planetary gear be a plurality of; The a plurality of said planetary gear of each group all is meshed with central gear; Said planetary gear between each group is corresponding vertically, and said bearing pin is through corresponding a plurality of said planetary axle center vertically, and said moving block is connected through a plurality of respectively said planetary axle center of said bearing pin.
Preferably, said wrench body removably is connected in the centre of gyration of said moving block.
Preferably, said housing is provided with door handle device.
AC electrical spanner provided by the invention; Comprise housing, supply unit, scurry sharp motor, ordinary gear train deceleration device, epicyclic train deceleration device and wrench body; Wherein scurry and swash the inside that motor is arranged at housing, supply unit swashs motor and is connected and provides and scurry the sharp required electric energy of motor with scurrying, and the ordinary gear train deceleration device is by scurrying sharp driven by motor; The ordinary gear train deceleration device drives the epicyclic train deceleration device and rotates, and wrench body is connected with the epicyclic train deceleration device; Said epicyclic train deceleration device comprises through first rotating shaft and is connected in central gear and a plurality of planetary gear that is meshed with said central gear through tooth rest on the said housing; Said first rotating shaft is installed with the fluted disc that is meshed with the end wheel of said ordinary gear train deceleration device, and said wrench body is connected with a plurality of said planetary axle center; Said AC electrical spanner also comprises and is used to measure said sensor, information processor and the display unit that swashs rotating speed of motor of scurrying; Said information processor comprises and said sensor and the torque arithmetic module that is connected with said display unit, the control module that is preset with the memory module of reference current value and is used to measure said actual current value of scurrying sharp motor and said actual current value and said reference current value are made comparisons; When said actual current value during greater than said reference current value, control module control is said scurries and swashs motor and stop operating.
Need to prove that it is less to scurry the volume that swashs motor, and power is bigger, its rotating speed can reach 20000 change min more than, under the constant situation of power, rotating speed descends, its output torque will increase.AC electrical spanner provided by the invention, it is scurried, and sharp motor speed is bigger, and after ordinary gear train deceleration device and the deceleration of epicyclic train deceleration device, its rotating speed can be reduced to several revolution per seconds, so its output torque is bigger.In addition, need to prove that planetary centre wheel rotating speed is bigger; And the number of teeth of its central gear is less than the planetary number of teeth; Planetary gear carries out rotation and around the revolution of central gear, its revolution speed is very little under the drive of central gear; Wrench body of the present invention is connected with a plurality of planetary axle center, so can drive the rotation of wrench body by planetary revolution.So, can realize through the planetary gear pair that high speed rotating with motor is reduced to and slowly run, and then make motor output high pulling torque.
In addition, in wrench body was screwed the process of bolt, the suffered moment of resistance of wrench body increased gradually, and when wrench body was increased by the moment of resistance, its rotating speed reduced, and then made rotating speed of motor reduce, and motor speed is compelled when reducing, and its internal current will increase.Information processor provided by the invention comprises memory module and control module, and memory module is provided with a reference current value in advance by the staff, in the course of work; Scurrying sharp motor increased by the moment of resistance; Cause the actual current of motor to increase, control module can be measured this actual current value, and actual current value and reference current value are made comparisons; When actual current value during more than or equal to reference current value; Be that the moment of torsion that wrench body is exported is when setting moment of torsion, control module control is scurried sharp motor and is stopped operating, and wrench body stops screwing to bolt.So, through the size of above-mentioned reference current value is set, the output torque of wrench body can be set.Therefore, AC electrical spanner provided by the invention can be set the output torque value, when the pretightning force of a plurality of bolts requires to equate, can adopt AC electrical spanner provided by the invention, and the torque value of its output is a fixed value, and then can guarantee workpiece installation stress equalization.
Need to prove, in the AC electrical spanner is being screwed the bolt process, along with its moment of resistance that receives increases gradually; Scurrying sharp rotating speed of motor reduces gradually; Swash rotating speed of motor and calculate the output torque that the bosom friend flows electric wrench so can scurry, so AC electrical spanner provided by the invention is provided with and is used to measure the sensor of scurrying sharp motor speed through mensuration; Information processor comprises the torque arithmetic module that is connected with this sensor; This torque arithmetic module can calculate the output torque of AC electrical spanner through the motor speed that sensor records, owing to information processor is connected with display unit, so it can show result of calculation to display unit; Promptly through display unit, the staff can learn the situation of AC electrical spanner output torque.
In sum, AC electrical spanner provided by the invention, it can provide bigger torsional forces, and can set the corresponding torque value according to installation requirement.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of AC electrical spanner in the specific embodiment of the invention;
Fig. 2 is the control principle sketch map of AC electrical spanner in the specific embodiment of the invention.
The specific embodiment
The invention provides a kind of AC electrical spanner, it can provide bigger torsional forces, and can set the corresponding torque value according to installation requirement.
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the inventive embodiments is carried out clear, intactly description, obviously, described embodiment only is this specific embodiment part embodiment, rather than whole embodiment.Based on the embodiment in this specific embodiment, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the structural representation of AC electrical spanner in the specific embodiment of the invention; Fig. 2 is the control principle sketch map of AC electrical spanner in the specific embodiment of the invention.
The AC electrical spanner that this specific embodiment provided comprises housing 11, supply unit 19, scurries and swash motor 12, ordinary gear train deceleration device 13, epicyclic train deceleration device 14 and wrench body 15.
Need to prove that scurry sharp motor 12 and can be arranged in the housing 11, its power output shaft can stretch out in housing 11; Scurrying sharp motor 12 required power supplys is provided by supply unit 19; This supply unit 19 can be specially a kind of portable charged bag, certainly, and under the situation of conditions permit; This specific embodiment provided scurries and swashs motor 12 and also can directly directly link to each other with power supply, only needs to provide to scurry to swash the required electric energy of motor 12 rotations and get final product.
Scurry and swash motor 12 drive ordinary gear train deceleration devices 13, ordinary gear train deceleration device 13 drives epicyclic train deceleration devices 14 and rotates.It can be realized through following mode; Epicyclic train deceleration device 14 comprises through first rotating shaft and is connected in central gear and a plurality of planetary gear that is meshed with central gear through tooth rest on the housing 11; First rotating shaft is installed with the fluted disc that is meshed with the end wheel of ordinary gear train deceleration device, and wrench body 15 is connected with a plurality of planetary axle center.The rotating housing 11 that is arranged at of first rotating shaft; Which is provided with fluted disc, fluted disc is meshed by the end wheel of ordinary gear train deceleration device, and then the ordinary gear train deceleration device can be sent to first rotating shaft with torque; First rotating shaft is provided with central gear; Central gear drives planetary gear and rotates, and planetary gear also has the revolution around central gear in autobiography.Wrench body 15 is rotated with planetary revolution.
So be provided with, ordinary gear train deceleration device 13 can make scurries the deceleration more by a small margin that obtains that swashs motor 12, and the reduction of speed that then carries out by a relatively large margin through epicyclic train deceleration device 14 then is sent to wrench body 15 with moment of torsion.Wrench body 15 needs suitable with the nut of bolt, need to prove that wrench body 15 can be the inner hexagon spanner main body, also can be the wrench body that can be placed in nut.
Should be appreciated that in motor it is less to scurry the volume that swashs motor 12, be easy to carry, and its rotating speed be very fast with constant power, rotating speed can reach 20000 change.Those skilled in the art it is understandable that, under the constant situation of power, scurry the rotating speed that swashs motor 12 and descend, and the moment of torsion of its output will increase.The AC electrical spanner that this specific embodiment provided, it is scurried, and sharp motor 12 rotating speeds are bigger, and after ordinary gear train deceleration device 13 and 14 decelerations of epicyclic train deceleration device, its rotating speed can be reduced to several revolution per seconds, so its output torque is bigger.
In addition, need to prove that planetary centre wheel rotating speed is bigger; And the number of teeth of its central gear is less than the planetary number of teeth; Planetary gear carries out rotation and around the revolution of central gear, its revolution speed is very little under the drive of central gear; The wrench body 15 that this specific embodiment provided is connected with a plurality of planetary axle center, so can drive the rotation of wrench body 15 by planetary revolution.So be provided with, can realize through the planetary gear pair that high speed rotating with motor is reduced to and slowly run, and then make motor output high pulling torque.
The AC electrical spanner that this specific embodiment provided also comprises sensor 16, information processor 17 and the display unit 18 that is used to measure the rotating speed of scurrying sharp motor 12.
Wherein, Information processor 17 comprises and sensor 16 and the torque arithmetic module that is connected with display unit 18, the control module that is preset with the memory module of reference current value and is used to measure the actual current value of scurrying sharp motor 12 and actual current value and reference current value are made comparisons; When actual current value during greater than reference current value, control module control is scurried and is swashed motor and stop operating.
Need to prove that in wrench body 15 was screwed the process of bolt, the wrench body 15 suffered moments of resistance increased gradually; When wrench body 15 was increased by the moment of resistance, its rotating speed reduced, and then made that scurrying the rotating speed that swashs motor 15 reduces; When motor speed is compelled to reduce, its internal current will increase.
The information processor 17 that this specific embodiment provided comprises memory module and control module, and memory module is provided with a reference current value in advance by the staff, in the course of work; Scurrying sharp motor increased by the moment of resistance; Cause the actual current of motor to increase, control module can be measured this actual current value, and actual current value and reference current value are made comparisons; When actual current value during more than or equal to reference current value; Be that the moment of torsion that wrench body is exported is when setting moment of torsion, control module control is scurried sharp motor and is stopped operating, and wrench body stops screwing to bolt.
So be provided with,, the output torque of wrench body 15 can be set through the size of above-mentioned reference current value is set.Therefore, the AC electrical spanner that this specific embodiment provided can be set the output torque value; When the pretightning force of a plurality of bolts requires to equate; The AC electrical spanner that can adopt this specific embodiment to provide, the torque value of its output are fixed value, and then can guarantee workpiece installation stress equalization.
In addition, need to prove, in the AC electrical spanner is being screwed the bolt process; Along with its moment of resistance that receives increases gradually, scurry the rotating speed that swashs motor 12 and reduce gradually, so can scurry the output torque that the rotating speed that swashs motor 12 is learnt the AC electrical spanner through mensuration; So AC electrical spanner that this specific embodiment is provided; Be provided with to be used to measure and scurry the sensor 16 that swashs motor speed 12, information processor 17 comprises the torque arithmetic module that is connected with this sensor, and this torque arithmetic module can calculate the output torque of AC electrical spanner through the motor speed that sensor 16 records; Because information processor 17 is connected with display unit 18; So it can show result of calculation to display unit 18 that promptly through display unit 18, the staff can learn the situation of AC electrical spanner output torque.
In sum, AC electrical spanner provided by the invention, it can provide bigger torsional forces, and can set the corresponding torque value according to installation requirement.
The AC electrical spanner that this specific embodiment provided, its ordinary gear train deceleration device 13 can specific as followsly be provided with.Ordinary gear train deceleration device 13 can comprise through second rotating shaft and is connected in first group of gear of housing 11 and is connected in second group of gear of housing 11 through the 3rd rotating shaft.Certainly, also can comprise the 3rd group of gear, the 4th group of gear etc., this specific embodiment does not limit the quantity of gear train.Following content will be that example describes in detail with two groups of gears.
Scurry the power output shaft that swashs motor 12 and be provided with external tooth; First group of gear comprises that the first gear that is meshed with the external tooth of motor power output shaft reaches and coaxial first pinion that links to each other of first gear; Second group of gear comprises that the second largest gear that is meshed with first pinion reaches and coaxial second pinion that links to each other of second largest gear, and second pinion is meshed with fluted disc.
Need to prove that above-mentioned first gear, first pinion and second largest gear, second pinion can be specially spur gear, certainly, also can be the gear of other type, such as helical gear, bevel gear etc.
So be provided with; Scurry the power output shaft that swashs motor 12 and be provided with external tooth, through external tooth moment of torsion is delivered to the first gear of first group of gear, because first gear and the coaxial setting of first pinion; So first gear equates with the rotating speed of first pinion; First pinion is meshed with second largest gear, because the first pinion number of teeth is less than second largest gear, so the rotating speed of second largest gear is less than the rotating speed of first pinion.Second pinion and the coaxial setting of second largest gear; Second pinion is identical with second largest gear rotational speed; Second pinion is delivered to fluted disc with moment of torsion, and then drives the secondary central gear rotation of planetary gear, and the number of teeth of second pinion is less than the fluted disc number of teeth; So the rotating speed of fluted disc is less than the rotating speed of second pinion, promptly the rotating speed of the central gear of planet gear pair is less than the rotating speed of second pinion.Obviously, scurry and swash the decelerating effect of motor 12, can realize preliminary deceleration through fixed axis gear ordinary gear train deceleration device 13.
In addition, the wrench body 15 that this specific embodiment provided can be connected with a plurality of planetary axle center through following mode.Wrench body 15 can be connected with the axle center of a plurality of new gears through a moving block, and this moving block is provided with and the corresponding pin-and-hole in a plurality of planetary axle center, and bearing pin is plugged in the pin-and-hole and the planetary axle center hole of moving block simultaneously.Need to prove,,, can guarantee, the rotation under a plurality of planetary revolution drive of moving block so bearing pin is connected with being connected to of planetary axle center hole is rotating because planetary gear has rotation.Wrench body 15 is arranged at the centre of gyration of moving block, and then drives the moving block rotation by planetary gear, so that moving block drives wrench body 15 rotations.
Carry out screwing of nut because planetary gear drives wrench body 15 around the revolution of central gear,, more stably revolve round the sun in order to guarantee planetary gear so the suffered moment of resistance of planetary gear is bigger; The planetary gear that this specific embodiment provides can be many groups, and each group comprises a plurality of planetary gears of equal amount, for example; Can be divided into two groups; Be respectively first group of planetary gear and second group of planetary gear, first group of planetary gear comprises three planetary gears, and second group equally also need comprise three planetary gears.These two groups are distributed in central gear vertically, and three planetary gears of every group all are meshed with central gear.First group of planetary three planetary axle center is corresponding one by one with three planetary axle center of second group, and bearing pin is vertically through planetary axle center, and bearing pin is through the centre of gyration of above-mentioned moving block.
So be provided with, it rotates moving block through the multilayer gear driven, has effectively improved the stability of its rotation process.
For the AC electrical spanner that makes that this specific embodiment provided, be applicable to the installation of the bolt of various models, wrench body 15 dismountable centres of gyration that are arranged at moving block.So be provided with, when the model of bolt not simultaneously, only need pull down wrench body, change with the suitable wrench body of bolt and get final product.
In addition, in order to improve the operability of the AC electrical spanner that this specific embodiment provides, can be provided with door handle device on the housing 11.This door handle device can be arranged at the opposite end that housing 11 is provided with wrench body 15.So be provided with, the staff can carry out installment work through the holds handle device, has effectively improved the operability of AC electrical spanner.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (6)
1. AC electrical spanner; It is characterized in that, comprising: housing, supply unit, be arranged at the inside of said housing and be connected with said supply unit scurry sharp motor, by said epicyclic train deceleration device of scurrying the ordinary gear train deceleration device that swashs driven by motor and be connected in said housing, driving by said ordinary gear train deceleration device and the wrench body that is connected with said epicyclic train deceleration device; Said epicyclic train deceleration device comprises through first rotating shaft and is connected in central gear and a plurality of planetary gear that is meshed with said central gear through tooth rest on the said housing; Said first rotating shaft is installed with the fluted disc that is meshed with the end wheel of said ordinary gear train deceleration device, and said wrench body is connected with a plurality of said planetary axle center; Said AC electrical spanner also comprises and is used to measure said sensor, information processor and the display unit that swashs rotating speed of motor of scurrying; Said information processor comprises the torque arithmetic module that is connected with said sensor and said display unit, be preset with the memory module of reference current value and be used to measure the said control module of scurrying the actual current value that swashs motor and said actual current value and said reference current value being made comparisons; When said actual current value during greater than said reference current value, control module control is said scurries and swashs motor and stop operating.
2. AC electrical spanner as claimed in claim 1 is characterized in that, said ordinary gear train deceleration device comprises through second rotating shaft and is connected in first group of gear of said housing and is connected in second group of gear of said housing through the 3rd rotating shaft; The said power output shaft that swashs motor of scurrying is provided with external tooth; Said first group of gear comprises that the first gear that is meshed with said external tooth reaches and coaxial first pinion that links to each other of said first gear; Said second group of gear comprises that the second largest gear that is meshed with said first pinion reaches and coaxial second pinion that links to each other of said second largest gear, and said second pinion is meshed with said fluted disc.
3. AC electrical spanner as claimed in claim 2; It is characterized in that; Said wrench body is connected with a plurality of said planetary axle center through moving block; Said moving block is connected through bearing pin with a plurality of said planetary axle center respectively, and said wrench body is connected in the centre of gyration of said moving block.
4. AC electrical spanner as claimed in claim 3; It is characterized in that; Said planetary gear is for many groups of distributing vertically and respectively to organize said planetary gear be a plurality of, and a plurality of said planetary gear of each group all is meshed with central gear, and the said planetary gear between respectively organizing is corresponding vertically; Said bearing pin is through corresponding a plurality of said planetary axle center vertically, and said moving block is connected through a plurality of respectively said planetary axle center of said bearing pin.
5. AC electrical spanner as claimed in claim 4 is characterized in that said wrench body removably is connected in the centre of gyration of said moving block.
6. AC electrical spanner as claimed in claim 5 is characterized in that said housing is provided with door handle device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110293819.8A CN102501208B (en) | 2011-09-29 | 2011-09-29 | Alternating-current electric wrench |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110293819.8A CN102501208B (en) | 2011-09-29 | 2011-09-29 | Alternating-current electric wrench |
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| Publication Number | Publication Date |
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| CN102501208A true CN102501208A (en) | 2012-06-20 |
| CN102501208B CN102501208B (en) | 2015-03-11 |
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| CN201110293819.8A Expired - Fee Related CN102501208B (en) | 2011-09-29 | 2011-09-29 | Alternating-current electric wrench |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013143489A1 (en) * | 2012-03-31 | 2013-10-03 | 苏州宝时得电动工具有限公司 | Hand-held electric tool and control method thereof |
| CN103817638A (en) * | 2013-05-27 | 2014-05-28 | 成都众山科技有限公司 | Electric allen wrench convenient to use |
| CN103962996A (en) * | 2013-02-01 | 2014-08-06 | 江苏金立电子机械科技有限公司 | Alternating current type electric torque wrench |
| CN104552115A (en) * | 2013-10-09 | 2015-04-29 | 江苏金立电子机械科技有限公司 | DC (Direct Current) electric fixed-torque wrench |
| CN104656551A (en) * | 2014-09-02 | 2015-05-27 | 苏州宝时得电动工具有限公司 | Control method and system for electric tool, and electric tool |
| CN105388922A (en) * | 2014-09-02 | 2016-03-09 | 苏州宝时得电动工具有限公司 | Control method and control system for electric tool, and electric tool |
| WO2016034136A1 (en) * | 2014-09-02 | 2016-03-10 | 苏州宝时得电动工具有限公司 | Control method and control system for electric tool, and electric tool |
| CN106965119A (en) * | 2017-02-28 | 2017-07-21 | 浙江大学 | Electric wrench |
| CN109612620A (en) * | 2018-11-21 | 2019-04-12 | 安徽大学 | A kind of detection method exchanging constant torque wrench torque |
| CN110977853A (en) * | 2019-12-19 | 2020-04-10 | 四川大学 | Automatic electric control wrench for tightening bolt in narrow space |
| CN112405413A (en) * | 2020-11-03 | 2021-02-26 | 杭州倍力耐工具有限公司 | Preset torque wrench |
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