CN102159363A - Screw tightening device and torque sensor - Google Patents
Screw tightening device and torque sensor Download PDFInfo
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- CN102159363A CN102159363A CN2009801365664A CN200980136566A CN102159363A CN 102159363 A CN102159363 A CN 102159363A CN 2009801365664 A CN2009801365664 A CN 2009801365664A CN 200980136566 A CN200980136566 A CN 200980136566A CN 102159363 A CN102159363 A CN 102159363A
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- motor
- torque sensor
- clutch
- rotating shaft
- torque
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
- B25B23/141—Mechanical overload release couplings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The present invention relates to a screw tightening device having a small-sized clutch, reduced in size and weight, and easily operable. A clutch (5) is directly connected to the output side of a DC motor (3), and as a result, the output of the DC motor (3) is less than the output of conventionally used motors. This reduces the size of the DC motor (3) and the clutch (5). Accordingly, the size and weight of a device body (1) are less than those of conventional products.
Description
Technical field
The present invention relates to a kind of can be correctly and easily to the motor being the torque sensor that the fastening force of the screw fastening device of drive source and driving side is measured.
Background technology
As screw fastening device in the past, have angle type, gun type etc., wherein, known screw fastening device with following structure, that is, decelerator is connected with the outlet side of Motor Drive portion, and clutch is connected with the outlet side of this decelerator, and the outlet side at this clutch is provided with sleeve barrel tool (for example, with reference to patent documentation 1).When screw is carried out fastening after, use torque wrench to reach desired fastening torque.
As the mechanism of mensuration at the fastener shaft power of the screw (bolt) of fastening object, be at bridge etc. deformeter is installed between screw and the fastening object, but for production line of car body etc. is unpractical, therefore, in nut erector, motor driver, be built-in with torque sensor, with the fastening torque value of real time monitoring, after reaching the target fastening force, implement braking it is stopped.
About the structure of torque sensor, have magnetostriction mode and encoder mode that the variation to the magnetic characteristic that causes because of distortion detects.
As patent documentation 2 is disclosed, for the magnetostriction mode, on the periphery of the member that it rotates integratedly at driving shaft or with driving shaft deformeter (being generally four) is installed, form testing circuit (Wheatstone bridge) with these four deformeters, owing to change because of the distortion torque that produces on driving shaft makes the Resistance Value of deformeter, therefore took out to detect torque value by changing as magnitude of voltage.
As patent documentation 3 was disclosed, the encoder mode was the angle that the phase difference of the output of a pair of rotary type encoder that is provided with according to the two ends at torsion bar detects distortion.
In addition, also exist use not utilize the mechanical clutch of deformeter and carry out fastening mechanism with certain fastening force.This mechanism is changed to axial force with the revolving force of driving shaft, and at the effect lower compression helical spring of this axial force, when decrement became certain value, switch work stopped rotation.
Technical literature formerly
Patent documentation
Patent documentation 1: Japanese kokai publication hei 06-079637 communique
Patent documentation 2: Japanese kokai publication hei 11-285933 communique
Patent documentation 3: TOHKEMY 2002-228526 communique
Summary of the invention
Yet, in screw fastening device in the past, because the outlet side at decelerator is provided with clutch, so need make clutch work with the output of the height after slowing down torque, thereby the capacity of clutch becomes big and maximizations that become, and causes device integral body also become maximization and bad this problem of operability thereby exist.In addition, if desired fastening torque increases, then reaction force also increases, and causes this problem of singlehanded operational difficulty thereby exist.
For the patent documentation 2 disclosed types that deformeter is installed on rotating shaft, it is rotating ring and brush contacting structure, noise impacts measuring precision, and brush wear causes existing endurance issues, and, for the structure that deformeter is installed on rotating shaft, must use the coil (four) of non-contact to be used for the input and output of voltage, thereby cause the increase of weight.
In the encoder mode of patent documentation 3, because the angle of the distortion of torsion bar is detected, so thereby the part of axle is attenuated increases distortion.Therefore, exceed the limiting range of stress easily and lack reliability.
Under the situation of using mechanical clutch, there are the following problems, that is, reduced by the mitigation torque because of spring performance causes impulsive force, and the positional precision of switch influences the torque precision significantly, and is having difficulties aspect torque and the spring constant coupling.
The present invention proposes in view of existing these problem points of technology in the past, and its purpose is to provide a kind of and makes the clutch miniaturization and make device integral body also miniaturization and and good screw fastening device and the torque sensor of operability.
First invention in first scheme that is used for addressing the above problem, screw fastening device is drive source with the motor, and the outlet side at motor is connected with clutch, is connected with decelerator at the outlet side of this clutch, is provided with sleeve barrel tool at the outlet side of this decelerator.
The screw fastening device that the invention of alternative plan is put down in writing based on first scheme is to described motor supply capability and described motor is rotated intermittently off and on.
The screw fastening device that the invention of third party's case is put down in writing based on first scheme or alternative plan determines that according to the operating state of the driving time of motor and/or the displacement switch that is provided with fastening torque has reached this situation of desired value on described clutch.
The switch lever that the screw fastening device that the invention of cubic case is put down in writing based on third party's case, described displacement switch utilization detect the motion of the locating part of described clutch and the spring buffer that the action of this switch lever cushions come work.
In order to address the above problem, the torque sensor of second invention possesses: cam mechanism, and it is to the driving force of described rotating shaft transmission from motor; Measure matrix, it is configured to around described rotating shaft with the rotating shaft noncontact and does not rotate, and this measurement matrix can compress in the axial direction; The decrement detecting element, it is installed on this measurement matrix; Control part, itself and this detecting element connection and the utilization mensuration Control of Voltage described motor corresponding with decrement.
As described measurement matrix being configured to around rotating shaft and rotating shaft noncontact and non-rotary mechanism, for example can expect measuring matrix at the outside of rotating shaft floating support via thrust bearing.
As described measurement matrix, form the cylindrical shell that constitutes by elastomers such as metal such as aluminium or resins.In this case, by adjust thickness can Control Shaft to decrement.That is, prepare the different measurement matrix of thickness in advance according to the size of target detection torque value, thereby can change as required.
In addition, as described cam mechanism, can expect that it comprises: the limiting plate that links with the driving shaft of motor; Locating part with described rotating shaft binding; Can contact the steel ball that the mode left links between described limiting plate and the locating part.
As described detecting element, deformeter, piezoelectric element are fit to.For deformeter the time, be installed in the outside of measuring matrix, for piezoelectric element the time, be installed in and be divided into vertically between the two-part measurement matrix.
The invention effect
According to the invention of first scheme, the outlet side that is not arranged on decelerator owing to clutch is provided in a side of the input side of decelerator, so can make the clutch miniaturization, thereby realizes the miniaturization and of the apparatus main body that the operating personnel controlled.In addition, since apparatus main body that the operating personnel controlled by miniaturization and, so even also can make the screw threads for fastening operation easy in narrow place.
According to the invention of alternative plan, by to motor off and on supply capability motor is rotated intermittently, can improve torque.In addition, because motor is rotated intermittently, thus the reaction force reduction, thus operating personnel's burden alleviated.
According to the invention of third party's case, can reach desired fastening torque.
According to the invention of cubic case, can reach desired fastening torque with higher precision.
According to second invention, since with the non-rotary discretely measurement matrix of driving shaft on decrement detecting element such as deformeter is installed, so need not the coil that the required voltage input and output of torque sensor are in the past used, and, therefore can reduce the parts number of packages and realize lightweight owing to can also save rotating ring, brush.
In addition, the also influence that can abate the noise, and by carrying out torque transfer by detecting element according to the voltage that the decrement of measuring matrix reads direct input, thereby increase substantially the mensuration precision.
Description of drawings
Fig. 1 is the concise and to the point side view of screw fastening device of the present invention.
Fig. 2 is the concise and to the point vertical view of screw fastening device of the present invention.
Fig. 3 is the key diagram of clutch, and wherein (a) is cutaway view, (b) is exploded view.
Fig. 4 is the key diagram of limiting plate, wherein (a) is the vertical view of limiting plate, (b) being the profile stretch-out view of the relation (clutch off working state) of expression limiting plate, steel ball and locating part, (c) is the profile stretch-out view of the relation (clutch duty) of expression limiting plate, steel ball and locating part.
Fig. 5 is the action specification figure of displacement switch, and wherein (a) is on-state, (b) is off-state.
Fig. 6 is the figure of example of the computer settings picture of expression intermittent controlled controller.
Fig. 7 is the figure that expression is suitable for the fastened tools of torque sensor of the present invention.
Fig. 8 is the cutaway view of torque sensor of the present invention, is the cutaway view along the B-B line of Fig. 3 (b).
Fig. 9 (a) is the side view of limiting plate, and Fig. 9 (b) is that the A of Fig. 9 (a) is to view.
Figure 10 is the cutaway view of the torque sensor under the compressive state
Figure 11 is the cutaway view of the torque sensor of other embodiment.
The specific embodiment
Below, embodiments of the present invention are described with reference to the accompanying drawings.At this, Fig. 1 is the concise and to the point side view of the screw fastening device of first invention, and Fig. 2 is the concise and to the point vertical view of the screw fastening device of first invention, and Fig. 3 is the key diagram of clutch, and Fig. 4 is the key diagram of limiting plate, and Fig. 5 is the action specification figure of displacement switch.
As shown in Figures 1 and 2, screw fastening device of the present invention comprises: the apparatus main body 1 of gun type, the controller (not shown) that direct current (DC) motor 3 of constituent apparatus main body 1 is controlled, as the cable 2 of lithium ion battery (not shown), jockey main body 1 and the controller of power supply.Controller and battery can be installed in and be wound on being with of operating personnel's waist, also can charging apparatus main body 1 in.
Apparatus main body 1 possesses: become the DC motor 3 of drive source, to decelerator 4 transmits the mechanical clutch 5 of the torque of DC motor 3, the described decelerator 4 that is made of planetary gear etc. that makes that the rotating speed of clutch 5 slows down, the screw that will engage by the torque of decelerator 4 outputs is fastening sleeve barrel tool 6, be used for the handle part (grip part) 7 that operating personnel's one hand controls, the bar 7a that on handle part 7, is provided with etc.DC motor 3 can not charged brush (brushless), also can chargedly brush.In addition, as shown in Figure 5, on clutch 5, be provided with the displacement switch 8 of the operating state that detects clutch 5.
By controller DC motor 3 is supplied with the electric power (electric current) of pulse type off and on, thereby realize the intermittent controlled of rotation intermittently.Utilize this intermittent controlled, the back clearance (back lash) of the gear part by applying flexibly decelerator 4, connector portions etc. thus produce impact effect, realize the raising of torque.In addition, the cycle by shortening interrupting time (on/off time) (for example, 0.1msec) is delivered at fastening reaction force and is rotated repeatedly before operating personnel's the arm and stops, thereby realize alleviating of reaction force.
As shown in Figure 3, clutch 5 comprises: the clutch lever 11 that the output shaft of DC motor 3 linked, roughly discoid limiting plate 12, three spheries steel ball 13, roughly discoid locating part 14, spiral helicine spring 15, spring base 16, adjust nut 17 etc.Shown in Fig. 4 (a), on the one side of limiting plate 12, be formed with to the trisection that makes progress near the week edge portion cam (rake 18a, par 18b, rake 18c) 18.The tiltangle of rake 18a, 18c is preferably 10 °～30 °.
In addition, be formed with recess 14a on the one side of locating part 14, this recess 14a is contained in steel ball 13 and the cam 18 opposed positions that form with steel ball 13 only about half of outstanding states on limiting plate 12.Steel ball 13 is by the cam 18 and the groove 14a clamping that is formed on the locating part 14 that are formed on the limiting plate 12.
Shown in Fig. 4 (b), between rake 18a and rake 18c, when fastening torque surpassed the elastic force of spring 15, shown in Fig. 4 (c), it got over the par 18b of overhead cam 18 to steel ball 13 before fastening torque surpasses the elastic force of spring 15.Then, even DC motor 3 drives, also owing to repeat steel ball 13 situation of the par 18b of overhead cam 18 more, thereby cut off, so the rotation of sleeve barrel tool 6 stops based on the rotation of the limiting plate 12 of DC motor 3 transmission to decelerator 4.
As shown in Figure 5, displacement switch 8 is connection, cut-off switch that the motion of locating part 14 that the position according to steel ball 13 is changed detects.Displacement switch 8 is installed on the base member 21 on the framework 20 that is fixed in clutch 5.And, move through switch lever 22 and the spring buffer 23 of locating part 14 transmit to displacement switch 8, one end 22a of described switch lever 22 is by the 14b of the edge portion clamping of locating part 14, and central portion 22b inserts in the base member 21 sliding freely, and other end 22c and displacement switch 8 butts, described spring buffer 23 compressions are installed between the other end 22c and base member 21 of switch lever 22.Need to prove that 8a is displacement switch 8 outstanding button during for off-state.
Shown in Fig. 5 (a), when steel ball 13 is located on the limiting plate 12 between the rake 18a of the cam 18 that forms and the rake 18c, between an end 22a of locating part 14 and switch lever 22, be provided with predetermined gap G.In addition, the other end 22c of switch lever 22 pushes displacement switch 8 by spring buffer 23 and makes displacement switch 8 become on-state reliably.When displacement switch 8 is on-state, can drive by DC motor 3.Owing to be provided with predetermined gap G between an end 22a of locating part 14 and switch lever 22, therefore the motion of unwanted locating part 14 can not be delivered to switch lever 22.
In addition, shown in Fig. 5 (b), when steel ball 13 was formed at the par 18b of the cam 18 on the limiting plate 12 on more, locating part 14 moved to the direction of compression spring 15.So, because an end 22a of locating part 14 push switch bars 22, so switch lever 22 slides and then the other end 22c of switch lever 22 compression spring buffer 23 and make displacement switch 8 become off-state with respect to base member 21.When displacement switch 8 became off-state, DC motor 3 stopped to drive.
The action of the screw fastening device of the present invention that constitutes in the above-described manner is described.At first, the operating personnel is with the handle part 7 of singlehanded holding device main body 1, and screw is installed in the sleeve barrel tool 6.Secondly, the front end that is installed on the screw of sleeve barrel tool 6 is navigated in the screwed hole that becomes fastening object, and press...with one's finger and be pressed in the switch (not shown) that handle part 7 is provided with.So DC motor 3 begins to drive, torque that DC motor 3 is produced and rotating speed via clutch 5, decelerator 4 to the screw transmission that is installed on the sleeve barrel tool 6.
At this moment, DC motor 3 is because controlled device is carried out intermittent controlled, so thereby the back clearance of the gear part by applying flexibly decelerator 4, connector portions etc. produce impact effect, realize that torque improves.In addition, by for example interrupting time (on/off time) such as 0.1msec is set, makes before fastening reaction force is delivered to operating personnel's arm, to be rotated repeatedly and to stop, thereby can realize alleviating of reaction force.
In addition, when thereby the rotation by sleeve barrel tool 6 is screwed together in screwed hole when reaching the fastening torque of expectation with screw, shown in Fig. 5 (a), at the rake 18a and the steel ball 13 between the rake 18c of cam 18 are got over overhead cam 18 like that shown in Fig. 5 (b) par 18b, locating part 14 moves to the direction of compression spring 15.At this moment, shown in Fig. 4 (b), (c), because rake 18a, 18c are provided with for example about 10 ° tiltangle, so even low torque also can make steel ball 13 go up par 18b more.
When steel ball 13 is gone up par 18b more, clutch 5 cuts off that the rotation that makes sleeve barrel tool 6 based on the rotation of DC motor 3 stops and an end 22a of locating part 14 push switch bars 22, thus the other end 22c of switch lever 22 compression spring buffer 23 and make displacement switch 8 become off-state.At this moment, because the par 18b of the cam 18 that steel ball 13 is rolled has the length of regulation, be used to make displacement switch 8 to become the compressing time of off-state reliably so can set.
When displacement switch 8 became off-state, DC motor 3 stopped to drive.Then, screw is screwed together in the screwed hole with the fastening torque of expectation, thereby at the screw threads for fastening end of job of a screw.
Fig. 6 is the figure of example of the computer settings picture of expression intermittent controlled controller, and in picture, S1 represents rotary speed, and A1～A3 represents electric current (torque), and T1～T11 represents the waveform time.In this example, be provided with the window portion that rotary speed S1, electric current (torque) A1～A3 and waveform time T 1～T11 are set in the bottom of picture, laterally have button on the right side of each window portion, can increase and decrease and impose a condition by clicking this button.The chart of the first half of picture can be represented above-mentioned imposing a condition by the elapsed time.
In addition, when clicking " start " button of picture, Motor Control is instructed from Computer Storage in the input controller, thereby makes its rotation in the control motor.
According to screw fastening device of the present invention, directly connect the outlet side of DC motor 3 by making clutch 5, the output of DC motor 3 can be suppressed lower, so can make DC motor 3, clutch 5 miniaturizations than in the past.Therefore, become, light weight more small-sized of apparatus main body 1 than structure in the past.For example, need that the size of apparatus main body 1 of fastening torque of 30Nm and weight are compared with the past to be following situation.
The length of Figure 1 and Figure 2 (L) * width (W) * highly (H) becomes 260mm * 50mm * 150mm from 500mm * 70mm * 104mm in the past, and the size of apparatus main body 1 reduces about 50% than size in the past.In addition, the weight of apparatus main body 1 also becomes 1.SKg from the past 2.4Kg, reduces about 40% than in the past weight.About the size of in this case clutch 5, the diameter D shown in Fig. 3 (a) becomes 33mm from 116mm in the past, reduces approximately 80% than in the past size, and the weight of clutch 5 also becomes 200g from the past 1200g, reduces about 70% than in the past weight.
Need to prove, in embodiments of the present invention, determine this situation that fastening torque has reached the value of expectation by the operating state (from the variation of on-state) that is located at the displacement switch 8 on the clutch 5 to off-state, but also can be with the operating state of the driving time of DC motor 3 and displacement switch 8 as decision condition.In addition, can also only judge with the driving time of DC motor 3.
Next, with reference to the suitable embodiment of the torque sensor of description of drawings second invention.Fig. 7 is the figure that expression is suitable for the fastened tools of torque sensor of the present invention, Fig. 8 is the cutaway view of torque sensor of the present invention, it is cutaway view along the B-B line of Fig. 9 (b), Fig. 9 (a) is the side view of limiting plate, (b) A that is (a) is to view, and Figure 10 is the cutaway view of the torque sensor under the compressive state.
Be provided with motor 22, torque sensor of the present invention 30, decelerator 23 in the shell 21 of fastened tools, head 24 dismounting are installed on the decelerator 23 freely, and this head 24 embeds bolt 25, thereby carries out fastening to fastening object 26.In addition, be provided with action bars 27 on the handle part of shell 21, battery 28 is connected with the end of handle part.
Described torque sensor 30 possesses rotating shaft 31 and disposes cam mechanism 32, the driving force that this cam mechanism 32 transmits from described motor 22 to rotating shaft 31 via bearing at the slot part 31a of the lateral surface that is formed at this rotating shaft 31.This cam mechanism 32 comprises: the limiting plate 33 that links with the driving shaft of described motor 22, with the locating part 34 of rotating shaft 31 bindings, can contact the steel ball 35 that the mode left links between described limiting plate 33 and the locating part 34.
Flange part at described motor 22 is formed with the through hole 22a that passes for bolt 29, in addition, is formed with the bolt mounting holes 33a that screws togather for bolt 29 on described limiting plate 33, and motor 22 and limiting plate 33 are by bolt 29 combinations.
Lower surface at described limiting plate 33 is formed with cam path shown in Figure 9 36, and the steel ball 35 that is kept by described locating part 34 agrees with in this cam path 36, and under this state, the driving force of motor 22 is delivered to rotating shaft 31.
Measuring matrix 37 is configured to the rotating shaft noncontact and does not rotate at the pars intermedia of described rotating shaft 31.This measurement matrix 37 becomes the tubular that has flange part in top and bottom, and by aluminium, resin formations such as (synthetic rubber).
Need to prove that material and the shape of measuring matrix 37 are not limited to illustrated situation, so long as get final product applying the structure that its axial dimension changes under the power situation vertically.
In the top and bottom of measuring matrix 37, flange part is bearing in described locating part 34 respectively via thrust bearing 38,39 and is inserted between the holding plate 40 of bottom of rotating shaft 31.Consequently, measure the outside that matrix 37 floating grounds are bearing in rotating shaft 31.
Need to prove, prevent that by adjusting nut 41 holding plate 40 from deviating from, when changing when measuring matrix 37, by pulling down this adjustment nut 41 and holding plate 40 carries out.
The bar that the end of the rotating shaft 31 that is threaded at described adjustment nut 41 is formed with vertically for decelerator 23 carries out the chimeric hole of key.
In addition, at the peripheral part of described measurement matrix 37 deformeter 42 as detecting element is installed.The number of this deformeter 42 is individual arbitrarily, but installs three to four usually.In addition, control part 43 is connected with deformeter 42.
As mentioned above, in head 24 embeddings bolt 25 is arranged, drive motor 22 makes rotating shaft 31 rotations and carries out midway fastening to fastening object 26, when reaching the fastening torque value of regulation, resistance becomes big and steel ball 35 epirelief race 36 more, push locating part 34 as shown in Figure 10 downwards, the connecting state that limiting plate 33 and locating part are 34 is disengaged, thereby the driving amount of motor 22 is no longer transmitted to rotating shaft 31.
In addition, when locating part 34 being pressed to the below, measure matrix 37 and compressed vertically, deformeter 42 detects this decrement.Then, carry out the torque conversion and judge having reached this situation of torque value of regulation by the measured value of 43 pairs of deformeters 42 of described control part, thereby described motor 22 is stopped.
Figure 11 is the cutaway view of the torque sensor of other embodiment, in this embodiment, is divided into halfbody 37a and 37b up and down with measuring matrix 37, sandwiches the piezoelectric element 44 as detecting element between these halfbodies 37a, 37b.
When forming the structure of Figure 11, measure matrix 17 materials own and also can not have elasticity.
(utilizability on the industry)
According to the present invention, because clutch is not provided in a side of the outlet side of reducing gear, and be provided in a side of the input side of reducing gear, therefore can make the clutch miniaturization, thereby even can improve a kind of miniaturization and, operability is improved and also can make the screw thread terminal operation be easy to the screw fastening device in narrow place.
Symbol description
1... the device main body, 3...DC motor (motor), 4... decelerator, 5... clutch, 6... sleeve instrument, 7... handle part, 7a... bar, 8... displacement switch, 11... clutch lever, 12... limiting plate, 13... steel ball, 14... locating part, 15... spring, 18... cam, 18a, 18c... rake, 18b... the par, 22... switch lever, 23... spring buffer, θ ... inclination angle, 21... the shell of fastening instrument, 22... motor, 22a... through hole, 23... decelerator, 24... head, 25... bolt, the fastening object of 26..., 27... bar, 28... battery, 29... bolt, 30... torque sensor, 31... rotating shaft, 31a... pod, 32... cam mechanism, 33... limiting plate, 33a... bolt installing hole, 34... locating part, 35... steel ball, 36... cam path, 37... measurement matrix, 37a, 37b... measure the matrix halfbody, 38,39... thrust bearing, the 40... holding plate, 41... adjustment nut, 42... deformeter, 43... control part, 44... piezoelectric element.
Claims (10)
1. screw fastening device, it is a drive source with the motor, it is characterized in that,
Outlet side at motor is connected with clutch, is connected with decelerator at the outlet side of this clutch, is provided with sleeve barrel tool at the outlet side of this decelerator.
2. screw fastening device as claimed in claim 1, wherein,
To described motor supply capability and described motor is rotated intermittently off and on.
3. screw fastening device as claimed in claim 1 or 2, wherein,
Operating state according to the driving time of motor and/or the displacement switch that is provided with on described clutch determines that fastening torque has reached this situation of desired value.
4. screw fastening device as claimed in claim 3, wherein,
The switch lever that described displacement switch utilization detects the motion of the locating part of described clutch and the spring buffer that the action of this switch lever cushions come work.
5. torque sensor, it measures the torque that rotating shaft is applied, and it is characterized in that this torque sensor possesses:
Cam mechanism, it is to the driving force of described rotating shaft transmission from motor;
Measure matrix, it is configured to around described rotating shaft with the rotating shaft noncontact and does not rotate, and this measurement matrix can compress in the axial direction;
The decrement detecting element, it is installed on this measurement matrix;
Control part, itself and this detecting element connection and the utilization mensuration Control of Voltage described motor corresponding with decrement.
6. torque sensor as claimed in claim 5 is characterized in that,
Described measurement matrix is bearing in the outside of rotating shaft via the thrust bearing floating ground.
7. torque sensor as claimed in claim 5 is characterized in that,
The cylindrical shell of described measurement matrix for constituting by metal such as aluminium or elastomer.
8. torque sensor as claimed in claim 5 is characterized in that,
Described cam mechanism comprises: the limiting plate that links with the driving shaft of motor; Locating part with described rotating shaft binding; Can contact the steel ball that the mode left links between described limiting plate and the locating part.
9. torque sensor as claimed in claim 5 is characterized in that,
Described detecting element is the deformeter that is installed on the outside of described measurement matrix.
10. torque sensor as claimed in claim 5 is characterized in that,
Described detecting element is to be arranged on the piezoelectric element that is divided into vertically between the two-part measurement matrix.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-204946 | 2008-08-08 | ||
| JP2008204963A JP4493708B2 (en) | 2008-03-25 | 2008-08-08 | Torque sensor |
| JP2008-204963 | 2008-08-08 | ||
| JP2008204946A JP4454674B2 (en) | 2007-08-09 | 2008-08-08 | Screw tightening device |
| PCT/JP2009/003046 WO2010016185A1 (en) | 2008-08-08 | 2009-07-01 | Screw tightening device and torque sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102159363A true CN102159363A (en) | 2011-08-17 |
Family
ID=41664457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801365664A Pending CN102159363A (en) | 2008-08-08 | 2009-07-01 | Screw tightening device and torque sensor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102159363A (en) |
| WO (1) | WO2010016185A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636304A (en) * | 2012-04-26 | 2012-08-15 | 哈尔滨电机厂有限责任公司 | Torque measurement structure of water guide flap shaft of standardized high-precision model |
| CN103009325A (en) * | 2012-11-22 | 2013-04-03 | 浙江明磊工具实业有限公司 | Electric screwdriver |
| TWI493165B (en) * | 2013-05-23 | 2015-07-21 | Locking axial force testing device | |
| CN107243862A (en) * | 2016-03-24 | 2017-10-13 | 丰田自动车株式会社 | Screw thread tightening method and screw thread device for screwing up |
| TWI767588B (en) * | 2021-02-26 | 2022-06-11 | 碩豐工業股份有限公司 | Electric screw driver with clutch and torque measuring module thereof |
| CN115026752A (en) * | 2021-03-04 | 2022-09-09 | 本田技研工业株式会社 | Fastening tool control system and fastening tool |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS642129U (en) * | 1987-06-22 | 1989-01-09 | ||
| JPH0487782A (en) * | 1990-07-27 | 1992-03-19 | Hitachi Koki Co Ltd | Clutch type tightening tool |
| JPH0526267U (en) * | 1991-09-18 | 1993-04-06 | 三菱自動車工業株式会社 | Torque preset type fastening tool |
| JPH05223665A (en) * | 1992-02-18 | 1993-08-31 | Fujitsu Ltd | Torque detection part of motor |
| JPH07237146A (en) * | 1994-02-28 | 1995-09-12 | Zuien Ra | Overload power release device for power tool |
-
2009
- 2009-07-01 WO PCT/JP2009/003046 patent/WO2010016185A1/en active Application Filing
- 2009-07-01 CN CN2009801365664A patent/CN102159363A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102636304A (en) * | 2012-04-26 | 2012-08-15 | 哈尔滨电机厂有限责任公司 | Torque measurement structure of water guide flap shaft of standardized high-precision model |
| CN103009325A (en) * | 2012-11-22 | 2013-04-03 | 浙江明磊工具实业有限公司 | Electric screwdriver |
| TWI493165B (en) * | 2013-05-23 | 2015-07-21 | Locking axial force testing device | |
| CN107243862A (en) * | 2016-03-24 | 2017-10-13 | 丰田自动车株式会社 | Screw thread tightening method and screw thread device for screwing up |
| TWI767588B (en) * | 2021-02-26 | 2022-06-11 | 碩豐工業股份有限公司 | Electric screw driver with clutch and torque measuring module thereof |
| CN115026752A (en) * | 2021-03-04 | 2022-09-09 | 本田技研工业株式会社 | Fastening tool control system and fastening tool |
| CN115026752B (en) * | 2021-03-04 | 2024-03-12 | 本田技研工业株式会社 | Fastening tool control system and fastening tool |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010016185A1 (en) | 2010-02-11 |
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