WO2022136662A1 - Dispositif de vissage-devissage a impact a pilotage a vide - Google Patents
Dispositif de vissage-devissage a impact a pilotage a vide Download PDFInfo
- Publication number
- WO2022136662A1 WO2022136662A1 PCT/EP2021/087549 EP2021087549W WO2022136662A1 WO 2022136662 A1 WO2022136662 A1 WO 2022136662A1 EP 2021087549 W EP2021087549 W EP 2021087549W WO 2022136662 A1 WO2022136662 A1 WO 2022136662A1
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- WO
- WIPO (PCT)
- Prior art keywords
- hammer
- drive shaft
- motor
- rotation
- flywheel
- Prior art date
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 238000013519 translation Methods 0.000 claims description 15
- 230000001133 acceleration Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 2
- 230000000284 resting effect Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
- B25B23/147—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
- B25B23/1475—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers for impact 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
- 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
- B25B21/026—Impact clutches
Definitions
- the field of the invention is that of the design and manufacture of impact or impact screwing-unscrewing devices more commonly known as impact wrenches.
- An impact wrench is a tool conventionally used to ensure the tightening and loosening of elements, such as nuts or screws, without causing torque feedback in the hand of the operator who uses them.
- Such a tool comprises a motor, electric or pneumatic, and an impact mechanism, the input of which is connected to the rotor of the motor and the output comprising an output square capable of driving a screwing tool in rotation.
- the impact mechanism generally comprises a flywheel capable of being rotated by the motor, and carrying a mass, more generally called a hammer, capable of striking the output square, which acts as an anvil, and the thus drive in rotation to transmit to the element to tighten- loosen a torque.
- the impact mechanism thus transforms the kinetic energy of a rotating mass (driven by the motor) into impact energy.
- There are several types of impact mechanism but they have the common point of always having one or more hammers which strike the exit square.
- the tightening torque of an impact wrench is therefore a function of the number of impacts and the amount of energy transmitted to the anvil during each impact. It is generally claimed that the tightening torque of an impact wrench corresponds to the torque reached after 10 seconds of screwing.
- Another solution is to spin the impact wrench unloaded, i.e. hold the hammers in an unengaged position in which they cannot collide with the anvil, until the motor reaches a predetermined speed, then placing the hammers in an engaged position in which they are likely to collide with the anvil to generate a high power impact.
- Impact wrenches can therefore be further improved to allow them to quickly reach a high torque.
- the aim of the invention is in particular to provide an effective solution to at least some of these various problems.
- an objective of the invention is to provide an electric impact wrench making it possible to quickly reach a high tightening torque.
- the invention aims, according to at least one embodiment, to provide such an impact wrench which is simple in design.
- Another objective of the invention is, according to at least one embodiment, to provide such an impact wrench which is reliable and robust.
- Another object of the invention is, according to at least one embodiment, to provide such an impact wrench which is economical.
- an impact screwing-unscrewing device comprising: an electric motor comprising a rotor; means for controlling said motor capable of transmitting a control instruction to said motor; an impact mechanism comprising: at least one anvil mounted rotatably along the axis of rotation of said rotor; at least one hammer capable of being driven in rotation by said motor along said axis, said at least one hammer being movable between at least: a non-engaged position in which it is not likely to collide with said at least an anvil when it is rotated by said motor, and an engaged position in which it is likely to collide with said at least one anvil when it is rotated by said motor.
- a variation of said control setpoint delivered to said motor by said control means triggers the passage of said at least one hammer from one of its positions to the other.
- a simple variation of the control setpoint delivered to the motor makes it possible to move the hammers from one position to the other without it being necessary to implement actuator to allow this movement.
- said device comprising a flywheel coaxial with said rotor.
- said control means of said motor make it possible to implement said device for carrying out a screwing or unscrewing operation comprising the sequence of successive impact cycles during each of which the hammers collide against the anvils, said control means being able to transmit a control setpoint to said motor, said control means being able to generate, during each impact cycle, a variation of said control setpoint delivered to said motor by said means control, said variation triggering the passage of said at least one hammer from one to the other of its positions.
- -said at least one hammer comprises at least one striking surface and said at least one anvil comprises at least one collision surface
- -said rotor is provided with a drive shaft
- flywheel being rotatable relative to said drive shaft over an angular range delimited by at least one extreme position in which said flywheel and said drive shaft are linked in rotation and said at least one hammer is in its non-engaged position
- -said device comprising at least one actuating element acting on said at least one hammer to place it
- said angular range is delimited by two extreme positions of said drive shaft relative to said flywheel in which said flywheel and said drive shaft are connected in rotation and said at least one hammer is in its unengaged position.
- said at least one hammer is rotatable, between its engaged and unengaged positions, along an axis parallel to the axis of rotation of said motor.
- a device comprises an indexing pin integral in rotation with said drive shaft able to bear against at least one abutment integral in rotation with said flywheel in said at least one extreme position to connect in rotation said drive shaft and said flywheel.
- At least one actuating element comprises at least one lug integral in rotation with said drive shaft and capable of moving along at least one ramp integral with said at least one hammer
- said -said device comprises at least one driven pinion integral in rotation with each of said hammers integral with said flywheel,
- At least one actuating element comprising a driving pinion integral in rotation with said drive shaft and meshing with said driven pinion(s),
- a device comprises a secondary drive shaft integral in rotation but free in translation with said drive shaft, said secondary drive shaft being mounted movable in translation and in rotation relative to said flywheel of inertia along the axis of rotation of said drive shaft, said secondary drive shaft comprising at least one cam against which at least one guide finger secured to said flywheel is capable of moving, said at least one cam having a shaped profile to allow said secondary drive shaft to move in rotation relative to said flywheel over said angular range between said at least one extreme position and said predetermined position, and a translational movement of said drive shaft secondary drive relative to said flywheel during its movement between said at least one extreme position and said p predetermined position.
- said at least one hammer is fixed in translation but not in rotation with said drive shaft and is mounted so as to be able to move in translation relative to said flywheel in order to be moved between its engaged and unengaged position by said drive shaft.
- said motor comprises an internal stator provided with coils, said rotor being external, said at least one hammer being integral in rotation with said rotor and being mounted so as to be able to rotate with respect to said rotor between its engaged and non-engaged positions along an axis parallel to the axis of rotation of said rotor, the magnetic fields created by said coils acting on said at least one hammer: to place it in its non-engaged position when said control means supply said coils to drive said rotor in rotation, to place in its engaged position when said control means do not supply said coils to rotate said rotor.
- said control means are able: to deliver an acceleration setpoint in one direction of said motor to place said drive shaft in one of its extreme positions and to drive said flywheel in rotation in one direction until at a predetermined speed; in delivering a deceleration setpoint to said motor so that said drive shaft moves relative to said flywheel over said angular range to reach said predetermined position and place said at least one hammer in its engaged position to generate a collision of said at least one hammer against said at least one anvil, to deliver a setpoint for re-accelerating said motor in said direction.
- said control means are configured to: deliver a setpoint for supplying said motor to drive said rotor in rotation and place said at least one hammer in said non-engaged position; deliver a setpoint for said motor not to be supplied to place said at least one hammer in said non-engaged position and let said rotor rotate in said direction to cause said at least one hammer to collide against said at least anvil.
- said control means are configured to maintain the rotation of said rotor at said predetermined speed until they detect at least one parameter signifying that said at least one hammer occupies a predetermined angular position according to the axis of rotation of said rotor with respect to said at least one anvil before delivering said slowing down or non-feeding instruction.
- said motor comprises a sensor for measuring the angular position of said rotor
- said control means are configured to determine and record the angular position of said at least one anvil at the end of each impact cycle from from the measurement taken with said sensor, and to deduce therefrom at an impact cycle according to the angular position of said at least one hammer with respect to said at least one anvil and the achievement of said predetermined angular position.
- a device comprises an output shaft secured to said at least one anvil, said device comprising a sensor for measuring the angular position of said output shaft, said control means being configured to determine and record the angular position of said shaft output at the end of each impact cycle and to deduce therefrom at the following impact cycle the angular position of said at least one hammer with respect to said at least one anvil and the achievement of said predetermined angular position.
- said control means are able to drive said motor so as to stabilize the angular offset between said rotor and said flywheel at said predetermined angular position of said at least one hammer.
- a device comprises an angle sensor capable of measuring the angular position of said flywheel, said control means being capable of calculating the angular position of said rotor relative to said flywheel.
- Figure 1 illustrates a longitudinal sectional view of a device according to a first embodiment of the invention
- Figure 2 illustrates a partial exploded view of the device of Figure 1;
- FIG 3 illustrates different cross-sections of the device of Figure 1 with the hammers in the disengaged position
- Figure 4 illustrates different cross sections of the device of Figure 1 with hammers in the engaged position
- FIG 5 illustrates different cross sections of the device of Figure 1 with hammers in the engaged position
- Figure 6 illustrates a relative position of the hammers and anvils not allowing the hammers to move into the engaged position
- Figure 7(a) illustrates a relative position of the hammers and anvils allowing the hammers to move into the engaged position
- Figure 7(b) illustrates a relative position of the hammers and anvils with the hammers in the engaged position
- Figure 8 illustrates different relative positions of the hammers and anvils of a device in operation
- Figure 9 illustrates a longitudinal sectional view of a device according to a second embodiment of the invention.
- FIG 10 Figure 10 illustrates a partial exploded view of the device of Figure 9
- Figure 11 illustrates different cross-sections of the device of Figure 9 with hammers in the engaged position and colliding against the anvils;
- Figure 12 illustrates different cross-sections of the device of Figure 9 with the hammers in the disengaged position
- Figure 13 illustrates different cross-sections of the device of Figure 9 with hammers in the engaged position not in collision against the anvils;
- Figure 14 illustrates a longitudinal sectional view of a device according to a third embodiment of the invention.
- Figure 15 illustrates partial perspective views of a striking mechanism of the device of Figure 14 in different positions
- Figure 16 illustrates a partial exploded view of the device of Figure 14
- Figure 17(b) illustrates the guide pin pressing against the stop to place the hammers in the disengaged position
- Figure 17(a) illustrates any relative position of the hammers in the disengaged position and the anvils;
- Figure 18 illustrates a sectional view of the device of Figure 14;
- Figure 19 (b) illustrates the guide finger not resting against the stop to place the hammers in the engaged position
- Figure 19(a) illustrates the hammers in the engaged position colliding against the anvils
- Figure 20 illustrates the guide pin resting against the stop to place the hammers in the disengaged position;
- Figure 20(a) illustrates any relative position of the hammers in the disengaged position and the anvils;
- FIG 21 Figure 21 illustrates a fourth embodiment of a device according to the invention
- Figure 22 illustrates the variation over time of the speed and acceleration of the motor of a device according to the invention in operation.
- Such a device comprises a casing 1 housing an electric motor 2 comprising a stator 20 and a rotor 21 . It includes an actuation trigger 10.
- the rotor 21 is provided with a drive shaft 3 at the end of which two lugs 4 protrude by stretching one opposite the other along an axis perpendicular to the longitudinal axis of the drive shaft 3.
- the end of the drive shaft 3 also includes an index finger 5.
- the device comprises an impact mechanism 6 comprising: at least one anvil 60 rotatably mounted along the axis of rotation of the rotor 21; at least one hammer 61 capable of being driven in rotation by the motor along said axis.
- Each anvil 60 includes two opposing collision surfaces 601.
- the anvils 60 are connected in rotation to an output shaft 602, also called output square, able to carry a screwing-unscrewing bit to drive in rotation an element to be screwed-unscrewed such as a nut or a screw.
- Each hammer 61 comprises two opposite striking surfaces 610.
- Each hammer 61 also comprises two lugs 620 separated by a central hollow 630 defining a ramp profile 640 against which the lugs 4 of the drive shaft are likely to move.
- the hammers 61 are integral with a flywheel 7.
- the flywheel 7 forms a bell inside which the hammers 61 are placed. immobile on the flywheel 7, which extend along axes parallel to the axis of rotation of the rotor.
- the rotor, drive shaft, flywheel and output shaft are coaxial.
- the flywheel is crossed in its center by a hole 71 at the periphery of which is formed a groove 72, of larger external diameter, which stretches over an angular portion delimited by two stops 73.
- the implementation of two stops allows the device to operate both in screwing and unscrewing.
- the implementation of a single stopper would allow the device to operate only in one or the other of these two directions.
- the indexing finger 5 has a shape complementary to that of the groove 72 so that it can move there until it comes to rest sometimes against one or the other of the stops 73 delimiting the groove 72.
- the flywheel 7 is thus rotatable on the drive shaft 3 along the axis of the latter over an angular range delimited by the two stops 73.
- the flywheel is rotatable relative to the drive shaft over an angular range delimited by at least one extreme position, two extreme positions defined by the stops 73 in this embodiment, in which the flywheel of inertia and the drive shaft are linked in rotation.
- the flywheel 7 and the drive shaft 3 are connected in rotation in the direction tending to bring the indexing finger closer to the stop.
- Each hammer 61 is rotatable around the corresponding axis 70 between at least: a non-engaged position in which it is not likely to collide with the anvil 60 when it is driven in rotation by the motor , and an engaged position in which it is likely to collide with the anvil 60 when it is rotated by the motor.
- the striking and collision surfaces are likely to collide when the at least one hammer is in its engaged position and the at least one hammer is driven in rotation by the motor.
- the striking and collision surfaces are not likely to collide when the at least one hammer is in the non-engaged position and the at least one hammer is driven in rotation by the motor.
- the device comprising at least one actuating element acting on the at least one hammer to place it
- the actuating element comprises the lugs 4 integral in rotation with the drive shaft 3 which are capable of moving against the ramps 640 of the lugs 620 of the hammers 61.
- the lugs 4 and the ramps 640 are shaped
- the lugs 4 are housed in the central recesses 630 of the hammers 61.
- the hammers are thus maintained in their non-engaged position and the flywheel is connected in rotation with the drive shaft so that the motor can freely drive the hammers which revolve around the anvil without colliding with it.
- Figure 3 (c) illustrates the index finger 5 resting against a stop 73 of the flywheel.
- Figure 3(b) illustrates the corresponding disengaged position of the hammers.
- Figure 3(a) illustrates any angular position of the rotating hammers around the anvils in their disengaged position.
- Figure 4(c) illustrates the index finger 5 in a predetermined position between the stops 73 corresponding to the engaged position of the hammers.
- Figure 4(b) illustrates the corresponding engaged position of the hammers.
- Figure 4(a) illustrates any angular position of the hammers relative to the anvils before impact in their engaged position.
- Figure 5(c) illustrates the index finger 5 in a predetermined position between the stops 73 corresponding to the engaged position of the hammers.
- Figure 5(b) illustrates the corresponding engaged position of the hammers.
- Figure 5(a) illustrates a position of the hammers in their engaged position in collision against the anvils.
- the device comprises motor control means capable of transmitting a control instruction to the motor.
- control means comprise a user interface, such as a screen and/or a keyboard enabling the user to enter, for example, a tightening torque setpoint or a percentage of a maximum tightening torque.
- the control means comprise a controller making it possible to convert the user's instruction into a speed according to a pre-established control law. They make it possible to implement a method of controlling the device to work towards the realization of a screwing or unscrewing operation comprising the sequence of successive impact cycles during each of which the hammers come into collision against the anvils.
- the motor angle sensor allows the controller to know in real time the position of the rotor and to calculate its speed.
- the control means transmit to the motor a control instruction to cause it to reach a predetermined rotational frequency Vi.
- the device is in any state such as for example that of FIG. 8 (a).
- the drive shaft moves inside the groove of the flywheel until it comes to rest against the stop 73 (transition from FIG. 8(a) to 8(c) via 8(b) )).
- the flywheel is then linked in rotation to the drive shaft and the hammers are placed in their non-engaged position by the lugs; the anvils remain immobilized in rotation (cf. figure 8(d)).
- the control means drive the motor so that they remain at the rotation frequency Vi until a condition for verifying that the impact mechanism is in a suitable position. before impact is fulfilled.
- the hammers when the hammers are in the non-engaged position, they form a bell around the anvils. They can then circle around the anvils without interference with them.
- the hammers In order to be able to pass from their non-engaged position to their engaged position, the hammers must however occupy a particular position with respect to the anvils. Indeed, the relative position of the hammers and the anvils must be such that it can allow the hammers to pass into their engaged position without rubbing against the outer peripheral surface of the anvils.
- this sensor measures the angular position of the output shaft and therefore that of the anvils which remains fixed until the next impact.
- the position of the anvils is therefore known (it corresponds to that measured at the end of the previous impact cycle), while that of the hammers is deduced from that of the rotor measured by the motor angle. It is thus possible to know the relative position of the hammers and the anvils and to control the slowing down of the motor to place the hammers in their engaged position only when their angular position relative to the anvils allows them to pass from their non-engaged position to their position. engaged without interfering with the anvils.
- the control means record the position of the rotor which corresponds to that of the anvils.
- the relative position of the anvils the position of which is that recorded at the previous cycle, and of the hammers, which corresponds to that measured in real time with the angle sensor of the motor.
- the angular offset between the drive shaft and the flywheel must be equal to a predetermined value a.
- the motor is therefore decelerated by the control means so that the angular offset between the flywheel and the drive shaft reaches the predetermined value a in which the hammers are in their engaged position.
- control means d accelerate the motor up to the speed Vi in such a way that the angular offset between the drive shaft and the flywheel is maintained at the predetermined value a in which the hammers are in their engaged position.
- the speed Vi is maintained until the control means detect a rapid drop in the speed of the motor consecutive to the instant at which the hammers collide with the anvils to drive the output shaft in rotation and therefore the screw-in element.
- the position of the output shaft is measured at the end of the impact and then a new impact cycle is implemented.
- the impact cycles are chained until the desired tightening torque is reached.
- Figure 22 illustrates the variation over time of motor speed and acceleration during impact cycles.
- a tightening operation generally comprises two successive phases: an approach phase during which the screw is not in contact with the element to be tightened.
- the screw generally has a long distance to travel during which it emits almost no resistance, before reaching the element to be tightened. The speed of rotation of the screw must then be relatively high.
- a tightening phase during which the screw is in contact with the element to be tightened. The torque required to turn the screw increases significantly.
- the approach phase is carried out by making a multitude of small impacts.
- FIGS. 9 to 13 A second embodiment of an impact wrench according to the invention is presented in relation to FIGS. 9 to 13.
- the device comprises at least one driven pinion 8 integral in rotation with each of the hammers 61 .
- the actuating element here comprising a driving pinion 9 integral in rotation with the drive shaft 3 and meshing with the driven pinion of each hammer 61 .
- a relative movement of the drive shaft 3 with respect to the flywheel 7 thus makes it possible to move the at least one hammer between its engaged and unengaged positions.
- Figure 12 (c) illustrates the index finger 5 resting against a stop 73 of the flywheel.
- Figure 12(a) illustrates the corresponding disengaged position of the hammers.
- Figure 12(b) illustrates gear mesh.
- Figure 13 (c) illustrates the index finger 5 in a predetermined position between the stops 73 corresponding to the engaged position of the hammers.
- Figure 13(a) illustrates the corresponding engaged position of the hammers and any position of the hammers relative to the anvils before impact.
- Figure 13 (b) illustrates gear mesh.
- Figure 11(c) illustrates the index finger 5 in a predetermined position between the stops 73 corresponding to the engaged position of the hammers.
- Figure 11(a) illustrates the corresponding engaged position of the hammers and a position of the hammers colliding against the anvils.
- Figure 11(b) illustrates gear mesh.
- control means and the manner of controlling the motor are identical to that in the first embodiment.
- FIGS. 14 to 20 A third embodiment of an impact wrench according to the invention is presented in relation to FIGS. 14 to 20. The main differences between the third embodiment and the two previous ones are only detailed below.
- said at least one hammer is movable in translation, between its engaged and unengaged positions, along an axis parallel to the axis of rotation of said drive shaft.
- the device comprises a secondary drive shaft 9 integral in rotation but free in translation with the drive shaft 3 of the rotor 21.
- the secondary drive shaft 9 is mounted to move in translation and in rotation relative to the flywheel 7 along the axis of rotation of the drive shaft 3.
- the secondary drive shaft 9 comprises at least one cam 90 against which at least one guide finger 91 extending perpendicularly to the axis of rotation of the flywheel, integral with the flywheel 7, is capable of move.
- the cam 9 is delimited by two stops 73 delimiting an angular range of free rotation of the flywheel relative to the secondary drive shaft between two extreme positions.
- the at least one cam 90 has a profile shaped to allow the secondary drive shaft 9 to move in rotation relative to the flywheel over said angular range between the extreme positions and a predetermined position over the angular range , and a translational movement of the secondary drive shaft relative to the flywheel during its movement from one or the other of the extreme position and the predetermined position.
- the hammers 61 are axes mounted mobile in translation in slideways 700 the flywheel along axes parallel to its axis of rotation.
- Each hammer has a groove 650 inside which is housed an edge of a washer 100 fixed to the end of the secondary drive shaft 9 so as to link the hammers in translation with the drive shaft. secondary drive to move them between their engaged and unengaged positions.
- Elastic return means such as compression springs 11, act on the hammers to tend to bring them back to their non-engaged position.
- Figures 15(a) and 15(b) illustrate the hammers in the disengaged position.
- Figure 15(c) illustrates the hammers in the engaged position.
- Figure 17(b) illustrates guide pin 91 pressing against stop 73 to place the hammers in the disengaged position.
- Figure 17(a) illustrates any relative position of the hammers in the disengaged position and the anvils.
- Figure 20(a) illustrates the guide pin 91 resting against the stop 73 to place the hammers in the disengaged position.
- Figure 20(a) illustrates any relative position of the hammers in the disengaged position and the anvils.
- Figure 19 (b) illustrates the guide pin 91 not resting against the stop 73 to place the hammers in the engaged position.
- Figure 19(a) illustrates the hammers in the engaged position colliding against the anvils.
- a fourth embodiment is presented in relation to FIG.
- the motor comprises an internal stator 20 provided with coils 200, the rotor being 21 external.
- the external rotor constitutes a flywheel.
- the hammers are integral in rotation with the rotor, and are mounted so as to be able to rotate with respect to the rotor along axes parallel to the axis of rotation of the latter by between its engaged and non-engaged positions.
- the striking surfaces 610 of the hammers 61 protrude from the periphery of the rotor in order to be able to come into collision with the anvils.
- the striking surfaces 610 of the hammers 61 do not protrude from the periphery of the rotor so as not to be able to come into collision with the anvils.
- the magnetic fields created by the coils acting on the hammers to place them in their non-engaged position when the control means supply the coils to drive the rotor in rotation, to place them in their engaged position when the control means do not supply the coils to drive said rotor in rotation.
- the control means are therefore capable of transmitting to the motor: a rotation drive control setpoint to place the hammers in their non-engaged position and drive the rotor in rotation, and a motor stop control setpoint to place the hammers in their engaged position and trigger an impact of the hammers against the anvils.
- Elastic return means such as compression springs, and/or centrifugal force, allow the power cut to the coils to move the hammers into their engaged position.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/259,167 US20240051100A1 (en) | 2020-12-24 | 2021-12-23 | Impact screwing/unscrewing device with idling control |
EP21840637.9A EP4267346A1 (fr) | 2020-12-24 | 2021-12-23 | Dispositif de vissage-devissage a impact a pilotage a vide |
JP2023538988A JP2024502779A (ja) | 2020-12-24 | 2021-12-23 | アイドリング制御付き衝撃ねじ込み/ねじ抜き装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2014124A FR3118434B1 (fr) | 2020-12-24 | 2020-12-24 | Dispositif de vissage-dévissage à impact à pilotage à vide |
FRFR2014124 | 2020-12-24 |
Publications (1)
Publication Number | Publication Date |
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WO2022136662A1 true WO2022136662A1 (fr) | 2022-06-30 |
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ID=75746762
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/087549 WO2022136662A1 (fr) | 2020-12-24 | 2021-12-23 | Dispositif de vissage-devissage a impact a pilotage a vide |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240051100A1 (fr) |
EP (1) | EP4267346A1 (fr) |
JP (1) | JP2024502779A (fr) |
FR (1) | FR3118434B1 (fr) |
WO (1) | WO2022136662A1 (fr) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3098027A1 (fr) * | 2015-02-27 | 2016-11-30 | Black & Decker Inc. | Outil d'impact avec mode de commande |
EP3653339A1 (fr) * | 2018-10-05 | 2020-05-20 | Etablissements Georges Renault | Clé à choc électrique à mécanisme d'impact rebondissant |
-
2020
- 2020-12-24 FR FR2014124A patent/FR3118434B1/fr active Active
-
2021
- 2021-12-23 US US18/259,167 patent/US20240051100A1/en active Pending
- 2021-12-23 EP EP21840637.9A patent/EP4267346A1/fr active Pending
- 2021-12-23 JP JP2023538988A patent/JP2024502779A/ja active Pending
- 2021-12-23 WO PCT/EP2021/087549 patent/WO2022136662A1/fr active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3098027A1 (fr) * | 2015-02-27 | 2016-11-30 | Black & Decker Inc. | Outil d'impact avec mode de commande |
EP3653339A1 (fr) * | 2018-10-05 | 2020-05-20 | Etablissements Georges Renault | Clé à choc électrique à mécanisme d'impact rebondissant |
Also Published As
Publication number | Publication date |
---|---|
FR3118434B1 (fr) | 2023-06-02 |
FR3118434A1 (fr) | 2022-07-01 |
JP2024502779A (ja) | 2024-01-23 |
US20240051100A1 (en) | 2024-02-15 |
EP4267346A1 (fr) | 2023-11-01 |
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