CN106926179A - Electric tool - Google Patents
Electric tool Download PDFInfo
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- CN106926179A CN106926179A CN201511030367.9A CN201511030367A CN106926179A CN 106926179 A CN106926179 A CN 106926179A CN 201511030367 A CN201511030367 A CN 201511030367A CN 106926179 A CN106926179 A CN 106926179A
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- China
- Prior art keywords
- output shaft
- motor
- electric tool
- detection means
- control device
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- 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
- B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The invention discloses a kind of electric tool, it includes：Output shaft, motor, supply unit, housing, detection means and control device；Output shaft is used for outputting torsion, motor is used to drive output shaft, and for being powered to motor, housing is used to accommodate motor supply unit, detection means is used to detect the rotational parameters of output shaft, and control device is used to make supply unit stop being powered to motor when rotational parameters reach preset parameter value；Wherein, output shaft can be to export axis as axle is rotated under the driving of motor；Rotational parameters characterize the amount of spin of output shaft；Detection means is constituted with control device and electrically connects or communicate to connect, and control device is constituted with supply unit and/or motor and electrically connected.The electric tool can unclamp and autostop when not completely disengaging from nut in nutting with respect to screw, so as to reduce the possibility of workpiece or part failure, eliminate potential safety hazard.
Description
Technical field
The present invention relates to a kind of electric tool, and in particular to a kind of electric impact wrench.
Background technology
Electric wrench is exactly the spanner with alternating current or battery bag as power, is a kind of high intensity instrument tightened or looser a bolt with the part such as nut.Electric wrench is broadly divided into electric impact wrench, electric torsional shearing wrench, electric fixed-torque spanner, electronic corner spanner and electronic angular spanner etc..
Wherein, electric impact wrench is when nut is unscrewed; because its intensity is higher; often occur nut with respect to the situation that screw is back-outed completely; at this moment because nut is completely disengaged from screw; it is likely to nut loss occur or the problem for causing workpiece to fail that drops, is particularly also possible to can the presence of certain potential safety hazard in work high above the ground.
The content of the invention
A kind of electric tool, including：Output shaft, motor, supply unit, housing, detection means and control device；Output shaft is used for outputting torsion, motor is used to drive output shaft, and for being powered to motor, housing is used to accommodate motor supply unit, detection means is used to detect the rotational parameters of output shaft, and control device is used to make supply unit stop being powered to motor when rotational parameters reach preset parameter value；Wherein, output shaft can be to export axis as axle is rotated under the driving of motor；Rotational parameters characterize the amount of spin of output shaft；Detection means is constituted with control device and electrically connects or communicate to connect, and control device is constituted with supply unit and/or motor and electrically connected.
Further, detection means is used as rotational parameters by detecting the number of turns that the rotation displacement or output shaft rotation of output shaft are crossed.
Further, electric tool also includes：Default device；Default device is used to be set for user the size of preset parameter value；Default device constitutes with control device and electrically connects or communicate to connect.
Further, detection means includes：Signal generation apparatus and signal receiving device；Signal generation apparatus are used to produce cyclical signal, the cyclical signal that signal receiving device is produced for detection or induced signal generating means；Wherein, detection means also includes processing unit, and the detection of processing unit processes signal receiving device or the cyclical signal for sensing obtain rotational parameters.
Or, detection means includes：Magnetic part and Hall element；Magnetic part can sense the magnetic number that magnetic part is produced for producing magnetic signal, Hall element；Magnetic part is attached to output shaft, and Hall element is fixed with respect to shell position.
Or, detection means includes：O-ring, magnetic part and Hall element；O-ring is attached to output shaft, and magnetic part can sense the magnetic number that magnetic part is produced for producing magnetic signal, Hall element；Wherein, at least partially embedded O-ring of magnetic part, Hall element is fixed with respect to shell position.
Further, electric tool includes：It is arranged at the transmission device between motor and output shaft；Output shaft is formed with hammer anvil；Transmission device includes：Hammer body and main shaft；Hammer body is provided with the hammer block that can coordinate with hammer anvil, and main shaft drives hammer body is moved back and forth while axle is rotated to export axis along output axis direction；Hammer body can drive output shaft to rotate forward or invert in the way of impacting.
Further, electric tool also includes：Starter；Starter has the starting state and closed mode that can mutually switch；When starter is in starting state, control device can make supply unit stop being powered to motor when rotational parameters reach preset parameter value, and when starter is closed, control device stops the control to supply unit or motor；Wherein, starter can be in starting state when output shaft is inverted or when being switched by user.
Another electric tool, including：Output shaft, motor, supply unit, housing, work head, detection means and control device；Output shaft has the output end for outputting torsion, motor is used to drive output shaft, supply unit is used to be powered to motor, housing is used to accommodate motor, work head is attached to the output end of output shaft, detection means is used to detect the rotational parameters of work head, and control device is used to make supply unit stop being powered to motor when rotational parameters reach preset parameter value；Wherein, output shaft can be to export axis as axle is rotated under the driving of motor, and work head constitutes synchronous axial system with output shaft；Rotational parameters characterize the amount of spin of work head；Detection means is constituted with control device and electrically connects or communicate to connect, and control device is constituted with supply unit and/or motor and electrically connected.
Further, detection means includes：O-ring, magnetic part and Hall element；O-ring is attached to work head, and magnetic part can sense the magnetic number that magnetic part is produced for producing magnetic signal, Hall element；Wherein, at least partially embedded O-ring of magnetic part, Hall element is fixed with respect to shell position.
A kind of control method suitable for electric tool, wherein, electric tool includes：Output shaft for outputting torsion, for drive output shaft rotate forward or reversion motor, the housing for the supply unit powered to motor and for accommodating motor；Wherein, control method includes step：Detect the rotational parameters of output shaft；Judge whether rotational parameters reach preset parameter value；Supply unit is controlled to stop being powered to motor when rotational parameters reach preset parameter value；Wherein, rotational parameters characterize the amount of spin of output shaft.
Further, rotational parameters are the rotation displacement of output shaft.
Further, the number of turns that rotational parameters are crossed for output shaft rotation.
Further, control method also includes the following steps before the rotational parameters of detection output shaft：Preset the size of preset parameter value.
Further, step controls supply unit to stop being powered to motor and could be performed when output shaft is inverted when rotational parameters reach preset parameter value.
Further, whether step controls supply unit to stop powering to perform to motor being controlled by user when rotational parameters reach preset parameter value.
The electric tool can unclamp and autostop when not completely disengaging from nut in nutting with respect to screw, so as to reduce the possibility of workpiece or part failure, eliminate potential safety hazard.
Brief description of the drawings
Fig. 1 is the structural representation of the electric tool of first embodiment；
Fig. 2 is the half sectional view of the electric tool in Fig. 1；
Fig. 3 applies to the flow chart of the control method of the electric tool in Fig. 1；
Fig. 4 be second embodiment electric tool in output shaft and detection means structural representation；
Fig. 5 is the half sectional view of the electric tool of 3rd embodiment.
Specific embodiment
Make specific introduction to the present invention below in conjunction with the drawings and specific embodiments.
The electric tool 100 of the first embodiment shown in Fig. 1 includes：Housing 10, switch 20, supply unit 30, motor（It is not shown）With output shaft 40.As shown in Fig. 2 electric tool 100 also includes：Transmission device 50.
Here electric tool 100 is by taking electric impact wrench as an example, for electric impact wrench, electric tool of the invention 100 can be automatically stopped nutting when nutting to relative screw unclamps and do not completely disengaged between both, the problem of screw or the workpiece failure so as to avoid nut and screw from completely disengaging from and cause, but also can eliminate because of the potential safety hazard that nut and screw are completely disengaged from and caused.
As depicted in figs. 1 and 2, housing 10 is used to accommodate each part in electric tool 100, and housing 10 can include handle portion 11 and receiving portion 12.Handle portion 11 is used to be gripped for user, and receiving portion 12 forms the receiving space for accommodating each part；Switch 20 can be installed on handle portion 11.User is capable of the trigger switch 20 of relatively convenient when handle portion 11 is gripped, and the switch 20 can be configured so that the main trigger for starting electric tool 100.
Supply unit 30 is used to be powered to motor, and for electric impact wrench, supply unit 30 can be the battery bag that can be removably bound to housing 10, it is also possible to by the form of external AC for electric impact wrench is powered.Motor is used to for the electric energy that supply unit 30 is provided to be converted into power output with driving transmission device 50.Output shaft 40 is used for outputting torsion, and under the driving of motor, output shaft 40 can be axle rotation to export axis 101.
Transmission device 50 is arranged between motor and output shaft 40, for making to constitute transmission between both.For electric impact wrench, transmission device 50 can drive output shaft 40 to rotate in the way of impacting.
Specifically, transmission device 50 can include：Main shaft 51 and hammer body 52.One end of output shaft 40 is output end, and output end is used for outputting torsion, and the other end is formed with or is connected with a pair of hammer anvils 41.Here before the output end also defined towards output shaft 40 is defined as, it is provided with after the other end of hammer anvil 41 is defined as towards output shaft 40, here fore-and-aft direction is intended merely to facilitate clearly explanation technical scheme and sets, and is not intended as limiting essentiality content of the invention.
One end that hammer anvil 41 is provided with close to output shaft 40 that hammer body 52 is set, the front end of hammer body 52 is provided with a pair of the hammer blocks that can coordinate with the hammer anvil 41 on output shaft 40（Figure is not marked）.The through hole that can be passed through for main shaft 51 is additionally provided with inside hammer body 52, it is corresponding respectively on main shaft 51 and hammer body 52 to be provided with two and half ball grooves（Figure is not marked）, be provided between half ball groove can wherein slidably spheroid（Figure is not marked）, one section of spring is additionally provided between main shaft 51 and hammer body 52（Figure is not marked）, under the mating reaction of half ball groove, spheroid and spring, may be such that main shaft 51 drive hammer body 52 with export axis 101 for axle is rotated while moved back and forth so as to drive output shaft 40 to rotate forward or invert in the way of impact along output axis 101 direction.How to coordinate so that main shaft 51 drives hammer body 52 that to drive output shaft 40 be prior art in the way of impacting for half ball groove, spheroid and spring, no longer describe in detail here.
Electric tool 100 also includes detection means（Figure is not marked）And control device（It is not shown）, detection means and control device constituted and electrically connect or communicate to connect, and control device is electrically connected with supply unit 30 and/or motor composition.Wherein, detection means is used to detect the rotational parameters of output shaft 40, and control device is used for the control supply unit 30 when the rotational parameters of detection reach preset parameter value and stops being powered to motor.It is known that for electric impact wrench, it occurs the situation that nut and screw are completely disengaged from the turn of the screw, often, and the appearance of such case is likely to cause workpiece failure or produces certain potential safety hazard.And pass through detection means and detect one or more rotational parameters, the rotational parameters characterize the amount of spin of output shaft 40, then judge whether the rotational parameters for detecting reach preset parameter value by control device, when control device judges that the rotational parameters for detecting reach preset parameter value, control device can control supply unit 30 to stop being powered to motor or controlled motor stalling such that it is able to avoid the occurrence of the situation that nut and screw are completely disengaged from.
Need exist for making further explanation to the rotational parameters of output shaft 40：Rotational parameters are a parameter of the amount of spin for characterizing output shaft 40, that is to say that rotational parameters characterize output shaft 40 have rotated how many with respect to a position.
Preset parameter value is the amount of spin that original position or a certain default position activity output shaft 40 when position is unscrewed are in from nut set in advance.Certain preset parameter value can also set different values with respect to the tightening degree of screw according to nut.
For output shaft 40, characterize the parameter of its amount of spin and can calculate to nut the initial position or default test position when nut is in original position or a certain default position residing for output shaft 40 and be in the location of output shaft 40 cut-off when unscrewing position.Wherein, initial position can be the location of output shaft 40 when not operated to nut also, default test position can be that nut is carried out to unscrew operation, but detection means is detected not since initial position, but a position from after initial position is detected that the detected position is considered default test position.
So, when user is when 100 nutting of electric tool as electric impact wrench is used, the rotational parameters of the amount of spin that detection means is used to characterize output shaft 40 by the detection for circulating, when nut reaches with respect to screw release unscrews position, rotational parameters reach preset parameter value, this timed unit control supply unit 30 stops being powered to motor, motor is stalled, nut is in respect to screw unscrews position and both is not completely disengaged from also, so as to the workpiece failure for avoiding screw and nut from completely disengaging from and cause and the security hidden trouble for producing, and then the validity of workpiece can be improved, improve operating efficiency and eliminate safe hidden trouble.
Specifically, the rotational parameters for characterizing the amount of spin of output shaft 40 can be the relative initial position of output shaft 40 or the turned rotation displacement of default test position, can also be the relative initial position of output shaft 40 or the turned number of turns of default test position.Wherein, rotation displacement refers to the certain point relative initial position or the turned angle of default test position or arc length on output shaft 40.It should be noted that, for angle, the turned angle of output shaft 40 within a round angle not being limited, in other words, if output shaft 40 rotated more than one week less than two weeks, so at this moment angular displacement should be a round angle plus the number of degrees more than a round angle, and must not believe that angular displacement now is only the number of degrees for being more than a round angle.Likewise, for arc length, the turned arc length of output shaft 40 is not also limited with a girth.
Here, rotational parameters are the parameters of a kind of angle, the number of turns, arc length etc., these parametric users can rule of thumb be easy to draw, so user can preset one and relatively can reasonably represent the preset parameter value that nut is unscrewed, and the parameter that this characterizes speed, the torsion of load etc relative to detection is more directly perceived.Because speed, torsion these characterize loads parameter for domestic consumer, should how much properly be set as it is difficult to be drawn with experience, or reach how much could represent that nut is unscrewed with respect to screw, conversely, the research staff that comparatively these parameters for characterizing load generally only specially do technology can calculate, therefore its practicality be nothing like by detect characterize amount of spin rotational parameters come it is more direct, so as to improve the practicality of electric tool 100.
Detection means can be the Hall sensor based on Hall effect, and it, based on photoelectric photoelectric sensor, can also be contact measuring apparatus based on theory of mechanics etc. that can also be.
Used as concrete scheme, detection means includes：Signal generation apparatus and signal receiving device.
Wherein, signal generation apparatus are attached to output shaft 40, and signal generation apparatus can produce a kind of cyclical signal of the position that can react output shaft 40, such as magnetic signal, optical signal, electric signal etc..Even, signal generation apparatus can be on output shaft 40 one can react its mechanical structure for rotating, the bulge-structure for for example on output shaft 40 being formed, when output shaft 40 is rotated, bulge-structure also rotates with output shaft 40, the rotation of the bulge-structure can react output shaft 40 and rotate, and the rotation that now bulge-structure occurs is it is also assumed that be that signal generation apparatus generate signal.In other words, the signal that signal generation apparatus are produced is not restricted to its and real can send certain PM signals.
Signal receiving device is fixedly installed with respect to housing 10, signal receiving device can sense or detect or receive the cyclical signal of signal generation apparatus generation, magnetic signal, optical signal can for example be sensed, or receive electric signal, again or, signal generation apparatus can detect or sense the rotation that bulge-structure occurs, and these may be considered signal receiving device sensing or detection or have received the cyclical signal of signal generation apparatus generation.Likewise, signal receiving device sensing or detection or the cyclical signal for receiving also are not restricted to its real can receive certain PM signals.
The cyclical signal that detection means can also be detected or sensed including processing unit, processing unit processes signal receiving device is so as to obtain rotational parameters.For example, signal generation apparatus are used to produce magnetic signal, when signal receiving device senses once periodic magnetic signal, processing unit records a secondary data, when signal receiving device senses once periodic magnetic signal again, processing unit records a secondary data again, and processes the data of record and obtain the size of real-time rotational parameters and by the data transfer to control device, circulates successively.
As a kind of scheme, foregoing preset parameter value can be a uncontrollable fixed value, for example when rotational parameters are the number of turns that output shaft 40 is rotated, the fixed value can for example be set to the institute of the output shaft 40 turned number of turns, for example, 5 when regular situation lower nut is unscrewed.Certainly, preset parameter value can also be set by user according to real work demand, and at this moment, electric tool 100 can for example include a default device（It is not shown）, preset device and electrically connect or communicate to connect with control device composition.Specifically, default device can be including setting the structures such as man-machine interface or operation button on the housing 10, user can preset a size for preset parameter value by operating the structures such as man-machine interface or operation button.For example, for when rotational parameters are the number of turns that output shaft 40 is rotated, preset parameter value can be set to the integer value in n1 to n2, or even be also possible to the discrete fractional value being set between n1 to n2.
Used as a kind of scheme, electric tool 100 can also include starter（It is not shown）, starter is with the starting state and closed mode that can be mutually switched.Wherein, when starter is in starting state, control device can make supply unit 30 stop being powered to motor when rotational parameters reach preset parameter value, and when starter is closed, control device stops the control to supply unit 30 or motor.In other words, whether control device can make supply unit 30 stop being powered to motor and be also activated the control of device when rotational parameters reach preset parameter value.Wherein, starter can automatically switch to starting state when output shaft 40 is inverted, it is also possible to switch to starting state by the active operation of user.
As shown in Fig. 2 in the present embodiment, signal generation apparatus can include magnetic part 61, signal receiving device can include Hall element 62.
Wherein, magnetic part 61 is used to produce magnetic signal, magnetic part 61 to be attached on output shaft 40, and such as magnetic part 61 is embedded in output shaft 40 by embedded mode, and magnetic part 61 is specifically as follows magnet.Hall element 62 can sense the magnetic signal that magnetic part 61 is produced, and Hall element 62 is fixed with respect to the position of housing 10, and Hall element 62 can be directly mounted on housing 10, or can also be attached on the parts that a relative position of housing 10 is fixed.So, when output shaft 40 is rotated, magnetic part 61 with the synchronous axial system of output shaft 40, also just because of magnetic part 61 is with the synchronous axial system of output shaft 40, therefore for relative Hall element 62, Hall element 62 can sense periodically variable magnetic signal when magnetic part 61 is rotated.When the first time of Hall element 62 magnetic signal is sensed, Hall element 62 or processing unit record a secondary data, and when Hall element 62 senses magnetic signal again, Hall element 62 or processing unit record a secondary data again, the data of processing unit processes record obtain the size of real-time rotational parameters and by the data transfer to control device simultaneously, the size of control device real-time judge rotational parameters and preset parameter value, the process of the above is circulated successively, until rotational parameters reach preset parameter value, this timed unit control supply unit 30 stops being powered to motor.Wherein, the setting of magnetic part 61 can cause just output shaft 40 rotate one enclose when Hall element 62 sense a cyclical signal, then the now corresponding number of turns that can be rotated by output shaft 40 of rotational parameters.Hall element 62 can sense magnetic signal when the setting of certain magnetic part 61 is also possible that output shaft 40 turns an angle, then the angle that now rotational parameters can also be rotated by output shaft 40.
As shown in figure 3, the present invention also proposes a kind of control method suitable for electric tool 100, the control method is comprised the following steps：
Detect the rotational parameters of output shaft 40.
Wherein, rotational parameters characterize the amount of spin of output shaft 40, rotational parameters can be the relative initial position of output shaft 40 or the turned rotation displacement of default test position, can also be the relative initial position of output shaft 40 or the turned number of turns of default test position.Wherein, rotation displacement refers to the certain point relative initial position or the turned angle of default test position or arc length on output shaft 40.When electric impact wrench is in nutting, the turned number of turns of the institute of output shaft 40 or angle energy direct reaction nut are with respect to the turned number of turns of screw or angle.
Judge whether rotational parameters reach preset parameter value.
When electric impact wrench is in nutting, the turned number of turns of the institute of output shaft 40 or angle energy direct reaction nut are with respect to the turned number of turns of screw or angle.And rule of thumb, as long as user preset before the startup of electric tool 100 size of preset parameter value i.e. can basic representation when rotational parameters reach the preset parameter value nut relative screw is unclamped and both is not completely disengaged from.
Supply unit 30 is controlled to stop being powered to motor when rotational parameters reach preset parameter value.
When rotational parameters reach preset parameter value, the turned angle of output shaft 40 or the number of turns cause that nut unclamps with respect to screw, at this moment can control to disconnect switch 20 so that supply unit 30 stops being powered to motor.
As a kind of scheme, can also be subject to the control of user or controlled by the operating mode of electric tool 100 for whether control device controls supply unit 30 to stop the step of being powered to motor.For example, when output shaft 40 is inverted, control device can control supply unit 30 to stop being powered to motor, and when output shaft 40 is rotated forward, control device can not control supply unit 30 to stop being powered to motor, in other words, only supply unit 30 could be controlled to stop being powered to motor when output shaft 40 is inverted and rotational parameters reach preset parameter value；For another example, during as user so that starter is in starting state, control device can control supply unit 30 to stop being powered to motor, and when control device is closed, control device can not control supply unit 30 to stop being powered to motor, and the execution that control supply unit 30 stops being powered to motor when in other words rotational parameters reach preset value is also controlled by user.
As a kind of scheme, the size of preset parameter value can also be preset according to actual operating mode before user is using the nutting of electric tool 100, so that the scope of application of electric tool 100 is more extensive.Wherein, before or after the size of step setting preset parameter value can be arranged on the rotational parameters of step detection output shaft 40.
These parametric users can rule of thumb be easy to draw that such user can preset one and relatively can reasonably represent the preset parameter value that nut is unscrewed, and the parameter that this characterizes speed, the torsion of load etc relative to detection is more directly perceived.Because speed, torsion these characterize loads parameter for domestic consumer, should how much properly be set as it is difficult to be drawn with experience, or reach how much could represent that nut is unscrewed with respect to screw, conversely, the research staff that comparatively these parameters for characterizing load generally only specially do technology can calculate, therefore its practicality be nothing like by detect characterize amount of spin rotational parameters come it is more direct, so as to improve the practicality of electric tool 100.
Fig. 4 show the structure of the output shaft 40 ' of the electric tool of the second embodiment of the present invention, and in this embodiment, it is different from the concrete structure for differing only in detection means of first embodiment.The structure and principle being adapted for the energy in first embodiment go for the present embodiment, specifically repeat no more.Hereinafter difference part of the present embodiment with respect to first embodiment is only introduced：
In the present embodiment, detection means includes：Magnetic part 61 ', Hall element 62 ' and O-ring 63 '.Wherein, O-ring 63 ' is sleeved on output shaft 40 ', and O-ring 63 ' for example can be rubber ring.For producing magnetic signal, magnetic part 61 ' to be embedded in O-ring 63 ', so, magnetic part 61 ' can constitute synchronous axial system to magnetic part 61 ' with output shaft 40 '.Hall element 62 ' can sense magnetic signal, and Hall element 62 ' is fixedly installed with respect to housing.Hall element 62 ' can be attached on housing, it is also possible to be attached on the parts that a relative housing is fixed.
Fig. 5 show the electric tool 100 of the third embodiment of the present invention " structure, in this embodiment, it is differed only in first embodiment：Electric tool 100 " also include be attached to output shaft 40 " output end first 70 " of work and the concrete structure of detection means.The structure and principle being adapted for the energy in first embodiment go for the present embodiment, specifically repeat no more.Hereinafter difference part of the present embodiment with respect to first embodiment is only introduced：
Wherein, work first 70 " and output shaft 40 " synchronous axial system is constituted, for electric impact wrench, first 70 " of the work can be sleeve.Detection means is used to detect the rotational parameters of first 70 " of work, and control device is used to make supply unit 30 when rotational parameters reach preset parameter value " stop being powered to motor, wherein, rotational parameters characterize the amount of spin of first 70 " of work.
Specifically, in the present embodiment, detection means includes：Magnetic part 61 ", Hall element 62 " and O-ring 63 ".Wherein, O-ring 63 " are sleeved on sleeve, O-ring 63 " for example can be rubber ring.Magnetic part 61 " is for producing magnetic signal, magnetic part 61 " it is embedded in O-ring 63 " in, so, magnetic part 61 " can be with output shaft 40 " constitute synchronous axial system.Hall element 62 " can sense magnetic signal, Hall element 62 " relative housing 10 " it is fixedly installed.Hall element 62 " can be attached to housing 10 " on, it is also possible to it is attached to a relative housing 10 " on fixed parts.
It will of course be understood that, in other embodiments, detection means can also detect the rotational parameters of the workpiece being connected with output shaft or work head, so equally can solve technical problem solved by the invention.
The basic principles, principal features and advantages of the present invention have been shown and described above.It should be understood by those skilled in the art that, the invention is not limited in any way for above-described embodiment, all technical schemes obtained by the way of equivalent or equivalent transformation, all falls within protection scope of the present invention.
Claims (10)
1. a kind of electric tool, including：
Output shaft, for outputting torsion；
Motor, for driving the output shaft；
Supply unit, for being powered to the motor；
Housing, for accommodating the motor；
Wherein, the output shaft can be to export axis as axle is rotated under the driving of the motor；
It is characterized in that：
The electric tool also includes：
Detection means, the rotational parameters for detecting the output shaft；
Control device, for making the supply unit stop being powered to the motor when the rotational parameters reach preset parameter value；
Wherein, the rotational parameters characterize the amount of spin of the output shaft；The detection means is constituted with the control device and electrically connects or communicate to connect, and the control device is constituted with the supply unit and/or the motor and electrically connected.
2. electric tool according to claim 1, it is characterised in that：
The detection means is used as the rotational parameters by detecting the number of turns that the rotation displacement or the output shaft rotation of the output shaft are crossed.
3. electric tool according to claim 1, it is characterised in that：
The electric tool also includes：
Default device, the size for setting the preset parameter value for user；
The default device constitutes with the control device and electrically connects or communicate to connect.
4. electric tool according to claim 1, it is characterised in that：
The detection means includes：
Signal generation apparatus, for producing cyclical signal；
Signal receiving device, for detecting or sensing the cyclical signal that the signal generation apparatus are produced；
Wherein, the detection means also includes processing unit, and signal receiving device detection described in the processing unit processes or the cyclical signal for sensing obtain the rotational parameters.
5. electric tool according to claim 1, it is characterised in that：
The detection means includes：
Magnetic part, for producing magnetic signal；
Hall element, can sense the magnetic number that the magnetic part is produced；
The magnetic part is attached to the output shaft, and the relatively described shell position of the Hall element is fixed.
6. electric tool according to claim 1, it is characterised in that：
The detection means includes：
O-ring, is attached to the output shaft；
Magnetic part, for producing magnetic signal；
Hall element, can sense the magnetic number that the magnetic part is produced；
Wherein, at least partially embedded O-ring of the magnetic part, the relatively described shell position of the Hall element is fixed.
7. the electric tool according to claim 1 to 6 any one, it is characterised in that：
The electric tool includes：
Transmission device, is arranged between the motor and the output shaft；
The output shaft is formed with hammer anvil；
The transmission device includes：
Hammer body, is provided with the hammer block that can coordinate with the hammer anvil；
Main shaft, drives the hammer body to be moved back and forth along the output axis direction while axle is rotated with the output axis；
The hammer body can drive the output shaft to rotate forward or invert in the way of impacting.
8. electric tool according to claim 7, it is characterised in that：
The electric tool also includes：
Starter, with the starting state and closed mode that can mutually switch；
When the starter is in the starting state, the control device can make the supply unit stop being powered to the motor when the rotational parameters reach the preset parameter value, when the starter is in the closed mode, the control device stops the control to the supply unit or the motor；Wherein, the starter can be in the starting state when the output shaft is inverted or when being switched by user.
9. a kind of electric tool, including：
Output shaft, with the output end for outputting torsion；
Motor, for driving the output shaft；
Supply unit, for being powered to the motor；
Housing, for accommodating the motor；
Work head, is attached to the output end of the output shaft；
Wherein, the output shaft can be to export axis as axle is rotated under the driving of the motor, and the work head constitutes synchronous axial system with the output shaft；
It is characterized in that：
The electric tool also includes：
Detection means, the rotational parameters for detecting the work head；
Control device, for making the supply unit stop being powered to the motor when the rotational parameters reach preset parameter value；
Wherein, the rotational parameters characterize the amount of spin of the work head；The detection means is constituted with the control device and electrically connects or communicate to connect, and the control device is constituted with the supply unit and/or the motor and electrically connected.
10. electric tool according to claim 9, it is characterised in that：
The detection means includes：
O-ring, is attached to the work head；
Magnetic part, for producing magnetic signal；
Hall element, can sense the magnetic number that the magnetic part is produced；
Wherein, at least partially embedded O-ring of the magnetic part, the relatively described shell position of the Hall element is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511030367.9A CN106926179B (en) | 2015-12-31 | 2015-12-31 | Electric tool |
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| CN111890286A (en) * | 2020-07-17 | 2020-11-06 | 周巧美 | Electric wrench |
| WO2023005456A1 (en) * | 2021-07-28 | 2023-02-02 | 江苏东成工具科技有限公司 | Sleeve assembly and electric tool |
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| WO2023005456A1 (en) * | 2021-07-28 | 2023-02-02 | 江苏东成工具科技有限公司 | Sleeve assembly and electric tool |
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| CN106926179B (en) | 2019-09-20 |
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