CN103846849A

CN103846849A - Electric screwdriver with screw locking detecting function

Info

Publication number: CN103846849A
Application number: CN201210505756.2A
Authority: CN
Inventors: 王德煌
Original assignee: KILEWS INDUSTRIAL Co Ltd
Current assignee: KILEWS INDUSTRIAL Co Ltd
Priority date: 2012-11-30
Filing date: 2012-11-30
Publication date: 2014-06-11

Abstract

The invention provides an electric screwdriver with a screw locking detecting function. The electric screwdriver comprises a screwdriver driving module, an operation detecting unit, a halting detecting unit, a control unit and an alarm unit. The screwdriver driving module is provided with a tool head, the operation detecting unit is connected with the screwdriver driving module, operation signals can be continuously outputted when the screwdriver driving module is operated, the control unit is connected with the operation detecting unit and the alarm module, and a first warning signal can be outputted to the alarm module when a computed operation signal starting and finishing duration is shorter than a lower limit of locking time. The electric screwdriver has the advantages that the electric screwdriver can know that the tool head stops rotating by the aid of interruption of the operation signals even if the electric screwdriver is braked not because of a clutch, so that screw unlocking phenomena not because of clutch braking can be detected, and negligence of users can be prevented.

Description

Can detecting screw the electric screw driver of locking

Technical field

The present invention relates to a kind of electric screw driver, particularly relate to a kind of can detecting screw the electric screw driver of locking, the whether floating lock of detecting screw, sliding tooth, and send alarm signal.

Background technology

Existing electric screw driver, mainly by the electrical motor driven one tool heads rotation in a bottle opener driver module (as screwdriver etc.), make user by tool heads lock screw, the elements such as nut, and the electric screw driver of earliest period is for avoiding after screw means, tool heads is still rotated further and causes internal circuit to burn out, therefore in bottle opener driver module, be equiped with a clutch unit, this clutch unit have can tool for detecting head by the frame for movement of screw locking (resistance that is tool heads rotation is excessive), and in tool for detecting head during by screw locking, automatically perform brake, and tool heads is shut down, to avoid circuit to burn out or tool heads damage.

But existing a kind of electric screw driver utilizes clutch unit to carry out the time of brake, automatically judge the situations such as the floating lock of screw or sliding tooth, it is main as Fig. 7, and it includes:

One bottle opener driver module 70, it includes an electro-motor 71, a clutch unit 72 and a tool heads 73, this clutch unit 72 is connected between this electro-motor 71 and this tool heads 73, and makes tool heads 73 depart from the driving of electro-motor 71 in the time of tool heads 73 screwing screw;

One stops detecting unit 80, be connected with the clutch unit 72 of this bottle opener driver module 70, and when being departed from electro-motor 71 by clutch unit 72, tool heads 73 exports a stop signal in detecting, generally speaking, stop detecting unit 80 for inductive switch, to export stop signal in the time that tool heads 73 is departed from electro-motor 71 by induction clutch unit 72;

One control module 90, stopping detecting unit 80 with the electro-motor 71 of this bottle opener driver module 70 and this is electrically connected, and be set with one and lock time lower limit, control module 90 detects the startup of bottle opener driver module 70, and receive and stop, after stop signal that detecting unit 80 exports, calculating bottle opener driver module 70 and receiving the time of stop signal from entry into service to control module 90, and judge whether this time is less than and lock time lower limit, if be less than, export a caution signal;

One alarm modules 100, is electrically connected with this control module, with start in the time receiving caution signal, as sends caution sound or bright warning lamp.

While there is sliding tooth or floating lock phenomenon in general screw, conventionally the screw thread misalignment of coping screw screw thread and screw, both are front stuck in what not yet screw tight, therefore, clutch unit 72 in bottle opener driver module 70 can be carried out the action that tool heads 73 is departed to electro-motor 71 before locking time lower limit, once above-mentioned electric screw driver detects after 70 startups of bottle opener driver module, clutch unit 72 fast tool heads 73 is departed from the electro-motor 71(time be shorter than lock time lower limit), represent the sliding tooth of screw, but, if in use and non-threaded misalignment and stuck, but user had stopped electric screw driver running (for example finger unclamps reasons such as starting button) before screw does not screw tight, now, screw is still in floating lock status, but because the tool heads 73 in bottle opener driver module 70 is without the state that screws outside screw, stop just no-output stop signal of detecting unit 80, make control module 90 cannot confirm that bottle opener driver module 70 receives the time of stop signal to control module 90 from entry into service, therefore can not export caution signal, alarm modules is not carried out warning action yet, this kind of floating lock situation just can be neglected by user, therefore, above-mentioned electric screw driver still needs improvement.

Summary of the invention

Because above-mentioned electric screw driver is using stop signal as basis for estimation, make bottle opener driver module unprovoked clutch unit action and while stopping, control module does not receive stop signal, without basis for estimation, the technological deficiency that causes the floating lock of part phenomenon to be detected, main purpose of the present invention proposes a kind of electric screw driver that can detecting screw locking.

As the technical way that will reach above-mentioned purpose and use, the electric screw driver that this can detecting screw locking includes:

One bottle opener driver module, it includes an electro-motor, a clutch unit and a tool heads, and this clutch unit is connected between this electro-motor and this tool heads, and in the time of tool heads screwing screw, makes tool heads depart from the driving of electro-motor;

One running detecting unit, is connected with the electro-motor of this bottle opener driver module, and continues output one CRANK PULSES in the time of this electro-motor running, stops exporting this CRANK PULSES in the time that electro-motor shuts down;

One stops detecting unit, is connected, and when tool heads is departed from electro-motor by clutch unit, exports a stop signal in detecting with the clutch unit of this bottle opener driver module;

One control module, be electrically connected with this running detecting unit and this bottle opener driver module, and be set with one and lock time lower limit, and in starting to receive after this CRANK PULSES, start a timing program and and lock audit program, this timing program calculates this CRANK PULSES from starting to the time finishing, this locks audit program in judging that this CRANK PULSES starts to be less than under the time of locking and to prescribe a time limit to the time finishing certainly, export one first caution signal, and in the time receiving this stop signal, stop the running of this electro-motor;

One alarm modules, is electrically connected with this control module, and start in the time receiving the first caution signal.

The present invention mainly continues this CRANK PULSES of output by the electro-motor of this running detecting unit in bottle opener driver module, until electro-motor stops exporting CRANK PULSES while shutting down, therefore, if this bottle opener driver module for example, stops its running because of user's operation (finger unclamps reasons such as starting button), this running detecting unit can stop exporting CRANK PULSES thereupon, control module still has and judges whether the lasting time of CRANK PULSES is less than the foundation that locks time lower limit, so, just while being able to cause electro-motor to stop in the action of unprovoked clutch unit, still have judgement to detect the foundation whether screw correctly locks, warned user in good time.

Brief description of the drawings

Figure 1A is a plane of electric screw driver of the present invention;

Figure 1B is another plane of electric screw driver of the present invention;

Fig. 2 is the circuit block diagram of electric screw driver of the present invention;

Fig. 3 is the detailed circuit diagram of control module, alarm modules and operation interface in Fig. 2;

Fig. 4 be in Fig. 2 control module processor built-in lock audit program flow chart;

Fig. 5 is the flow chart of alert program in Fig. 4;

Fig. 6 is the built-in self-teaching program flow diagram of processor in Fig. 2 control module;

Fig. 7 is the circuit block diagram of existing electric screw driver.

Reference numeral

10: bottle opener driver module 11: electro-motor

12: clutch unit 13: tool heads

14: start button 15: positive and negative switch

20: running detecting unit 30: stop detecting unit

40: control module 41: processor

42: internal memory 50: alarm modules

51:LED lamp 52: buzzer

60: operation interface 61: display

62: button 70: bottle opener driver module

71: electro-motor 72: clutch unit

73: tool heads 80: stop detecting unit

90: control module 100: alarm modules

Detailed description of the invention

Refer to Figure 1A, 1B to Fig. 3, the present invention can detecting screw the electric screw driver of locking include:

One bottle opener driver module 10, it includes an electro-motor 11, one clutch unit 12 and a tool heads 13, this clutch unit 12 is connected between this electro-motor 11 and this tool heads 13, and make tool heads 13 depart from the driving of electro-motor 11 in the time of tool heads 13 screwing screw, in the present embodiment, this bottle opener driver module 10 is provided with a startup button 14 and a positive and negative switch 15, this startup button 14 is connected this electro-motor 11 with this positive and negative switch 15, and control electro-motor 11 by this startup button 14 and start, this positive and negative switch 15 switches electro-motor 11 forwards and reversion,

One running detecting unit 20, is connected with the electro-motor 11 of this bottle opener driver module 10, and in the time that this electro-motor 11 turns round, continues output one CRANK PULSES, stops exporting this CRANK PULSES in the time that electro-motor 11 shuts down;

One stops detecting unit 30, is connected, and when tool heads 13 is departed from electro-motor 11 by clutch unit 12, exports a stop signal in detecting with the clutch unit 12 of this bottle opener driver module 10;

One control module 40, be electrically connected with this running detecting unit 20 and this bottle opener driver module 10, and be set with one and lock time lower limit Lt, and in starting to receive after this CRANK PULSES, start a timing program and and lock audit program, this timing program calculates this CRANK PULSES from starting to the time finishing, this locks audit program in judging that this CRANK PULSES starts to be less than under the time of locking and to prescribe a time limit to the time finishing certainly, export one first caution signal, and in receiving the running that stops this electro-motor when this stop signal, in the present embodiment, this control module 40 comprises a processor 41 and an internal memory 42, this processor 41 and this running detecting unit 20, this stops detecting unit 30 and this internal memory 42 connects, and carry out this and lock audit program, 42 storages of this internal memory lock time lower limit Lt, this processor 41 is further connected with the positive and negative switch 15 of this bottle opener driver module 10 again, to detect electro-motor 11 forwards and reversion,

One alarm modules 50, is electrically connected with this control module 40, and start in the time receiving the first caution signal, and in the present embodiment, this alarm modules 50 includes multiple LED lamps 51 and a buzzer 52.

Because the screw incorrect situation that locks can be divided into two kinds, a kind of locking time is too short, i.e. sliding tooth or screw and screw misalignment causes time that tool heads 13 locks lower than locking time lower limit Lt, and this situation can detect with above-mentioned electric screw driver; Another kind of situation is that screw size is not mated with screw, continuing spinning, do not detect this situation, can in the internal memory of above-mentioned electric screw driver control module 40 42, further store one and lock time upper limit Ht, and this locks audit program and further judges that electro-motor 11 exceedes and locks time upper limit Ht and control module 40 while not receiving stop signal yet from entry into service, export one second caution signal and give this alarm modules 50, drive alarm modules 50 starts, give a warning when solid and notify user to fail spiral shell in outside screw because of continuing spinning; And in like manner, if screw non-idling, but user unclamps startup button 14 when not yet by screw means, now, this locks audit program and also can judge and judge that electro-motor 11 exceedes and locks time upper limit Ht and control module 40 does not receive stop signal yet from entry into service, therefore electric screw driver of the present invention also can detect this situation and give a warning, guarantee that user uses electric screw driver really allow tool heads 13 lock screws and clutch unit 12 is moved.

Above-mentionedly lock time lower limit Lt for providing user to set, lock various execution patterns that time upper limit Ht or the present invention illustrate subsequently etc., above-mentioned electric screw driver is further provided with an operation interface 60, this operation interface 60 connects the processor 41 of this control module 40, and includes a display 61 and multiple button 62.

Below further illustrate control module 40 and carry out the detailed step that locks audit program, please further coordinate and consult Fig. 4, the above-mentioned audit program that locks comprises following steps:

Detect electro-motor 11 and start (step S10), in the time receiving CRANK PULSES, being judged to be this electro-motor 11 starts, and start to carry out this timing program in now, calculate the time that continues to receive CRANK PULSES, in the present embodiment, this step further reads a screw number to be locked being stored in advance in this internal memory 42, and exports this display 61 to show this screw number to be locked;

Whether the lasting time that receives CRANK PULSES of judgement has been greater than this locks time lower limit Lt(step S20); If not, send this first caution signal and carry out an alert program (step S30), this alert program detailed step describes in detail subsequently; If so, enter next step;

Wait for and receive stop signal, and judge that whether 11 startups of bottle opener electro-motor had received stop signal (step S40) in the past through the corresponding time that locks time upper limit Ht, if not, exported this second caution signal and carried out alert program (step S30); If so, enter next step;

Judge that screw correctly locks, and carry out the special operational program (step S50) of various activations, and after execution finishes, get back to and detect the step S10 that bottle opener electro-motor 11 starts, in the present embodiment, judge after screw correctly locks screw number to be locked is subtracted to 1, and show with display 61, the built-in special operational program of this control module 40 includes a buffering and confirms program and an auto-reverse program, this buffering confirmation program and this auto-reverse program are selected its one activation by button 62 selecting types of operation interface 60 and are carried out, in the time that this buffering confirms that program setting is activation, do not carry out this auto-reverse program, otherwise, if this auto-reverse program of activation, do not carry out this buffering and confirm program.

Please further consult again Fig. 5, in above-mentioned alert program (step S30), be set with a replacement operator scheme, and after alert program starts, carry out following steps:

Judge whether to carry out this replacement operator scheme (step S31), if not, finish alert program, and get back to lock and in audit program, detect the step S10 that electro-motor 11 starts; If so, enter next step;

Lock this bottle opener driver module 10(step S32), this electro-motor 11 cannot be started, and wait for reception one latch-release instruction, this latch-release instruction operates output by multiple buttons 62 of this operation interface 60;

After receiving latch-release instruction, remove the locking (step S33) of this electro-motor 11, and get back to lock and in audit program, detect the step S10 that electro-motor 11 starts; This latch-release instruction is exported by multiple buttons 62 operations of this operation interface 60.

Because the bottle opener driver module 10 of general electric screw driver all has the function of reversion tool heads 13, and above-mentioned bottle opener driver module 10 includes a positive and negative switch 15 for switching electro-motor 11 rotatings, if be user reversion tool heads 13 spiral shell persons of loosening the screw a little after screw locking is correct therefore above-mentioned buffering is confirmed the object of program, need screw number the to be locked add-back again subtracting after 1, again in order to coordinate two kinds of use habits, in this buffering confirmation program, be set with again a reversion and compute repeatedly pattern and a reversion single calculation pattern, and this buffering confirmation program is carried out and is reversed while computing repeatedly pattern, in waiting for a buffer time, often detecting electro-motor 11 once reverses, screw number to be locked is added to 1, when this buffering confirmation program is carried out reversion single calculation pattern, in waiting for when detecting electro-motor 11 in the buffer time reverses, screw number to be locked is added to 1, but to add 1 as the increase upper limit, so, get used to each screw and confirm the solid person of correct spiral shell, can select the single calculation pattern of reversing, custom is affirmant one by one again after the solid multiple screws of first spiral shell once, can select reversion to compute repeatedly pattern, to meet its use habit, avoids error count to calculate.

The auto-reverse time Rt of above-mentioned auto-reverse program setting one, and drive this electro-motor 11 to continue one section of auto-reverse time Rt of reversion; Can not in the time assembling, lock completely owing to there being segment screw in some specific products (as power transformation box), and must make its floating lock, use in order to rear end processing or user, so, assembling employee just can set this auto-reverse program of carrying out, to carry out reversion action after screw locking, make the floating lock of screw.

The processor 41 of above-mentioned control module 40 again further a built-in screw group lock audit program, wherein be set with one single checking mode and one whole group of checking mode, in the time of fill order's checking mode, first default one single locks the time and one and will lock quantity, and this to be locked to quantity and exports display 61 to and show, check in single to lock in the time, whether to complete the judgement that at least one screw correctly locks according to the above-mentioned audit program that locks again, if have, making this will lock after quantity subtracts 1 is shown by display 61, and start the judgement of next screw locking time, if not, export the 3rd caution signal, drive alarm modules 50 starts, in the time carrying out this whole group of checking mode, default one whole group locks the time and one and will lock quantity, and will lock quantity exports this display 61 to and shows, and check according to the above-mentioned audit program that locks whether lock in whole group judgement number of times that in the time, the screw that completes correctly locks has reached this and will lock quantity, if not, export the 4th caution signal, drive alarm modules 50 starts.

Whereby, assisted and require user to lock and in the time, all locked a screw in each section single, or auxiliaryly require user to lock and in the time, complete the screw locking action that will lock quantity in whole group.

For the time upper limit Ht that locks that makes to set in above-mentioned electric screw driver can be according to the screw change on actual use, thus in the processor 41 of control module 40 a further built-in self-teaching program, as shown in Figure 6, it comprises following steps to this self-teaching program:

Detect electro-motor 11 and start (step S71), in the time receiving CRANK PULSES, be judged to be this electro-motor 11 and start;

Start timing, and wait for this stop signal of reception (step S72);

Receive after stop signal (step S73), detect electro-motor 11 self-startings to time (being the time that control module 30 receives stop signal) (step S74) that clutch unit 12 is thrown off tool heads 13;

Judge whether to receive a confirmation instruction (step S75), if having, detected electro-motor 11 is started to the time that clutch unit 12 is thrown off tool heads 13 and be stored in this internal memory 42, and this time is set as to this locks time upper limit Ht(step S76); If also do not set this and lock time upper limit Ht without receiving this confirmation instruction, not storing, and get back to and detect the step S71 that electro-motor 11 starts; This confirmation instruction is exported by multiple button operations of this operation interface 60.

By above-mentioned means, user can carry out self-teaching pattern, and just the screw locking of an any specification in a screw, after this screw correctly locks, above-mentioned self-teaching pattern can record the time that locks the required cost of this specification screw, in the time locking the screw of same specification, what record by above-mentioned self-teaching pattern locks time upper limit Ht and can be used for more accurately judging screw locking correctness again.

Again because above-mentioned control module 40 can send first, second, third or the 4th caution signal after detecting different situations, 52 of buzzers in this alarm modules 50 are in receiving first, second, third and send respectively the caution sound of varying number when the 4th caution signal, as send two minors, three minors, a long etc.

In the time that user pins the startup button 14 in bottle opener driver module 10 of the present invention, this electro-motor 11 just starts driven tool 13 rotation, and now, this running detecting unit 20 just starts to continue this CRANK PULSES of output; Now, if electro-motor is no more than these 11 durations of runs and locks time lower limit Lt(and be conventionally set as 0.1 second), represent that the sliding tooth of screw or user point not by appropriate startup button 14, screw does not correctly lock, now, the processor 31 of this control module 40 is less than and locks time lower limit from the time starting to finishing detecting CRANK PULSES, and then drives and send the first caution signal and make alarm modules 50 starts, notifies user; If electro-motor exceedes this and lock time lower limit Lt 11 duration of runs, and now user's finger unclamps startup button 14 because of carelessness, screw is locked not yet, and this control module 40 also can be within the time that locks time upper limit Ht without receiving stop signal, also can detect this situation and give a warning; Therefore,, even electric screw driver unprovoked brake and stopping, electric screw driver of the present invention still can detect the floating lock of screw condition shape, and gives a warning; Moreover electric screw driver of the present invention also provides replacement operator scheme, after making to give a warning, user must the plurality of button 62 of hands-on removes the locking of bottle opener driver module 10, in order to avoid user ignores warning; In addition, the above-mentioned all functions that show a screw counting number in the time locking screw number, self-teaching program, auto-reverse program, reversion of also mentioning, make the function of electric screw driver be tending towards complete, and applicable user looks requirements set and carries out.

In sum, the present invention can detecting screw the electric screw driver of locking, when being guaranteed the various situations of driver module and being stopped, whether control module all can detect screw and correctly lock, and warn user in good time, avoid user to neglect, and various miscellaneous functions are provided, make electric screw driver function be tending towards complete, improve practicality.

Claims

1. can detecting screw the electric screw driver of locking, it is characterized in that, include:

According to claim 1 can detecting screw the electric screw driver of locking, it is characterized in that, in the internal memory of electric screw driver control module, further store one and lock time upper limit, and this locks audit program and further judges that electro-motor exceedes and locks time upper limit and control module while not receiving stop signal yet from entry into service, export one second caution signal and give this alarm modules, drive this alarm modules start.

According to described in 1 or 2 of claims can detecting screw locking electric screw driver, it is characterized in that, this bottle opener driver module further includes:

One starts button, connects this electro-motor, starts to control electro-motor; And

One positive and negative switch, connects this electro-motor, and switches electro-motor forward and reversion.

According to claim 3 can detecting screw the electric screw driver of locking, it is characterized in that, this control module includes: a processor and an internal memory, this processor and this running detecting unit, this stops detecting unit and this Memory linkage, and carry out this and lock audit program, this internal memory stores and locks time lower limit, and this processor is further connected with the positive and negative switch of this bottle opener driver module again, to detect electro-motor forward and reversion.

According to claim 4 can detecting screw the electric screw driver of locking, it is characterized in that, this alarm modules includes multiple LED lamps and a buzzer.

According to claim 5 can detecting screw the electric screw driver of locking, it is characterized in that, this electric screw driver is further provided with an operation interface, this operation interface connects the processor of this control module, and includes a display and multiple button.

According to claim 6 can detecting screw the electric screw driver of locking, it is characterized in that, this locks audit program and comprises following steps:

Detect electro-motor and start, in the time receiving CRANK PULSES, be judged to be this electro-motor and start, and start to carry out this timing program in now, calculate the time that continues to receive CRANK PULSES;

Whether the lasting time that receives CRANK PULSES of judgement has been greater than this locks time lower limit; If not, send this first caution signal and carry out an alert program; If so, enter next step;

Wait for and receive stop signal, and judge that whether electro-motor startup had received stop signal in the past through the corresponding time that locks time upper limit, if not, exported this second caution signal and carried out alert program; If so, enter next step;

Judge that screw correctly locks, selecting type is carried out buffering confirmation program and an auto-reverse program, and after execution finishes, gets back to the step that detects electro-motor startup.

According to claim 7 can detecting screw the electric screw driver of locking, it is characterized in that, the internal memory of this control module further stores a screw number to be locked;

The above-mentioned electro-motor setting up procedure that detects further reads the screw number to be locked being stored in this internal memory, and exports this display to show this screw number to be locked.

According to claim 8 can detecting screw the electric screw driver of locking, it is characterized in that, in this buffering confirmation program, be set with:

One reversion computes repeatedly pattern, in waiting in the buffer time, often detects electro-motor and once reverses, and screw number to be locked is added to 1; And

One reversion single calculation pattern, in waiting in the buffer time, detects the reversion that electro-motor carries out one to multiple time, all only screw number to be locked is added to 1;

This auto-reverse auto-reverse time of program setting one, and drive this electro-motor to continue the one auto-reverse period of reversion.

According to claim 9 can detecting screw the electric screw driver of locking, it is characterized in that, the processor of this control module further built-in screw group locks audit program, this screw group locks in audit program and is set with:

One single checking mode, before carrying out, first setting one single locks the time and one and will lock quantity, and this to be locked to quantity and exports display to and shown, check in single to lock in the time, whether to complete the judgement that at least one screw correctly locks according to the above-mentioned audit program that locks again, if have, make this will lock after quantity subtracts and shown by display, and start the judgement of next screw locking time, if not, drive alarm modules; And

One whole group of checking mode, before carrying out, one whole group of setting locks the time and one and will lock quantity, and will lock quantity exports this display to and is shown, and check according to the above-mentioned audit program that locks whether lock in whole group judgement number of times that in the time, the screw that completes correctly locks has reached this and will lock quantity, if not, drive alarm modules;

In this alert program, be set with a replacement operator scheme, and after alert program starts, carry out following steps:

Judge whether to carry out this replacement operator scheme, if not, finish alert program, and get back to lock and in audit program, detect the step that electro-motor starts; If so, enter next step;

Lock this bottle opener driver module, this electro-motor cannot be started, and wait for reception one latch-release instruction, this latch-release instruction is exported by multiple button operations of this operation interface;

After receiving latch-release instruction, remove the locking of this electro-motor, and get back to lock and in audit program, detect the step that electro-motor starts.