EP1954447A1 - Outil de vissage a tete d'angle, incluant un capteur de couple monte sur l'arbre de sortie, et module de transmission correspondant - Google Patents
Outil de vissage a tete d'angle, incluant un capteur de couple monte sur l'arbre de sortie, et module de transmission correspondantInfo
- Publication number
- EP1954447A1 EP1954447A1 EP06830243A EP06830243A EP1954447A1 EP 1954447 A1 EP1954447 A1 EP 1954447A1 EP 06830243 A EP06830243 A EP 06830243A EP 06830243 A EP06830243 A EP 06830243A EP 1954447 A1 EP1954447 A1 EP 1954447A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- output shaft
- gear
- tool according
- screwing tool
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- 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
- B25B13/00—Spanners; Wrenches
- B25B13/48—Spanners; Wrenches for special purposes
- B25B13/481—Spanners; Wrenches for special purposes for operating in areas having limited access
-
- 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
- B25B21/002—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose for special purposes
Definitions
- Angle head screwing tool including a torque sensor mounted on the output shaft, and corresponding transmission module.
- the field of the invention is that of the tooling. More specifically, the invention relates to industrial tools, and more particularly the tools provided to exert a screwing with a determined torque.
- the screwing tools are widely used in the industrial sector, the tools are fixed (which includes tools mounted on machines or manipulators) or portable.
- each cycle is connected by appropriate connectors to an electronic controller (in the form of a cabinet) for programming a large number of operating cycles (for example 250 cycles), each cycle can be composed of 20 phases of operation.
- an electronic controller in the form of a cabinet
- These cycles can be programmed directly from a keyboard that includes the electronic box or by associated programming software (the box or boxes are then connected to the programming system by a network type field, Ethernet or other).
- These systems make it possible to ensure traceability of the operations performed by the tool, for example by ensuring the recording of results such as the final tightening torque, the final tightening angle, the date and time of the operations or else the representative curves of the quality (good or bad, according to predetermined parameters) of the screwing done.
- the tool itself may also include means for indicating the quality of screwing, for example by providing a report "Good / Bad" viewable using LEDs.
- the tool is connected to the electrical sector of way to power a control electronics integrated into the tool.
- the tool has a small display and some buttons.
- the torque sensors implemented in the screwdrivers are constituted by strain gauges (generally mounted in bridge).
- these strain gauges are mounted on a support consisting of a cylindrical element 1 whose torsional deformation is measured by means of the gauges, this deformation being translated into a measurement of the tightening torque.
- a single stage epicyclic reduction comprises:
- a screwdriver such as that illustrated in Figure 1, in which the torque sensor is integrated on the reduction ring, corresponds to the most common technique for measuring the torque screw.
- the measurement of the tightening torque of a screwdriver is obtained by means of a torque sensor 3 integrated on the output shaft of the angle head, outlet of conical coupling 2.
- the technology of the torque sensor is of the type using: strain gauges stuck on the output shaft; an electronic circuit embedded on the output shaft; a rotating transformer.
- the rotating transformer supplies the onboard circuit with a voltage which, once rectified, feeds the strain gage bridge, which itself produces an output signal in the form of a voltage which is converted into a frequency signal by the onboard circuit and then recovered via the rotating transformer.
- the sensor technology used in this solution eliminates the problems of wear and signal continuity conventionally encountered with rotating collectors (because of the use of brushes in rotating contact with the collector tracks, generating friction necessarily causing wear of the brushes).
- the invention particularly aims to overcome the disadvantages of the prior art. More specifically, the invention aims to provide an angle screwdriver that is more reliable than existing solutions, particularly in that it allows to measure the torque actually applied to a screw.
- Another object of the invention is to provide such a screwdriver which offers a satisfactory and durable level of precision in the measurement of the torque.
- the invention also aims to provide such a screwdriver which avoids causing a significant increase in the height of the angle head.
- Another object of the invention is to provide such a screwdriver which can be manufactured more easily than conventional screwdrivers, especially in that it can be manufactured with a minimum of logistical constraints, by using production centers and / or or remote skills.
- Yet another object of the invention is to provide such a screwdriver that allows to consider significant gains in terms of maintenance.
- a screwing tool comprising: a motor shaft; an angle head comprising an output shaft whose axis of rotation is substantially orthogonal to the axis of said motor shaft; transmission means connecting said motor shaft to said output shaft; at least one torque sensor integrated on said output shaft; characterized in that said transmission means comprise at least one intermediate gear with an axis substantially parallel to said output shaft and cooperating with a gear for driving in rotation an output shaft, and at least one conical coupling connecting, directly or indirectly, said motor shaft and said one or more intermediate gears.
- a screwdriver makes it possible to integrate a torque sensor on the output shaft to precisely measure (the sensor being placed closer to the screw) the torque actually applied to the screw, while retaining a head height comparable to the standard tool described in the state of the art (in which the torque sensor is mounted on the reduction ring).
- the invention thus proposes a design of angle head more durable than existing solutions, this by the implementation of a drive of the output shaft via parallel gears, rather than by a conical coupling.
- parallel gears are simpler to manufacture, control and adjust.
- they provide a more homogenous tooth contact and a larger contact area. This results in a durability superior to that of a conical coupling.
- the conical coupling placed at the output of the motor shaft turns faster but is subject to a significantly lower torque than when it is placed in the corner head. It is therefore less subject to wear and / or breakage.
- said transmission means comprise a parallel intermediate gear train whose axes are parallel to said output shaft.
- the presence and length of the gear train makes it possible to more widely deport the size of the conical coupling relative to the angle head, which ensures good accessibility of the tool in small spaces.
- said transmission means are mounted within a detachable module of a member incorporating said torque sensor. According to another advantageous characteristic, said transmission means are mounted within a detachable module of a body. integrating said motor shaft and motor means.
- a screwdriver of modular design is obtained in which the three main constituents of the tool (motor, reduction and sensor) can be manufactured independently and combined. at the end of the assembly by a few screws.
- said transmission means are associated with sealed ball bearings.
- Such a module is therefore waterproof and can be perfectly independent of the engine block and / or torque sensor torque module.
- said torque sensor comprises at least one strain gauge bonded to said output shaft.
- said torque sensor comprises an electronic circuit embedded on said output shaft.
- said torque sensor comprises a rotating transformer.
- said gear is guided in an upper portion of said angle head by at least one ball bearing on either side of the toothing of said gear.
- said output shaft is guided in a lower portion of said corner head by at least one bearing with two rows of balls.
- said gear is guided in an upper part of said angle head by at least one ball bearing on either side of the toothing of said gear, said output shaft being guided in one part. bottom of said corner head by at least one bearing with two rows of balls.
- said one or more guide bearings of said gear are sealed bearings. In this way, the risk of possible grease leakage from the gear train and / or the gear coupled to the output shaft towards the sensor is avoided (which limits the risk of disturbances of the measurement).
- said member comprises a housing, said tool comprising stop means for diffusing into said housing axial stresses exerted on said output shaft.
- the invention also relates to a transmission module intended to be integrated in a screwdriver comprising: a motor shaft; an angle head comprising an output shaft whose axis of rotation is substantially orthogonal to the axis of said motor shaft; transmission means connecting said motor shaft to said output shaft; at least one torque sensor integrated on said output shaft, characterized in that it integrates said transmission means, these comprising at least one intermediate gear whose axis is intended to extend parallel to said output shaft and intended to cooperate with a gear carried by said output shaft, and at least one conical coupling intended to connect, directly or indirectly, said motor shaft and said one or more gears.
- Figure 1 is a longitudinal sectional view of a screwdriver head tool according to a first embodiment of the prior art
- FIG. 2 is a longitudinal sectional view of an angle head screwing tool according to a second embodiment of the prior art
- Figure 3 is a longitudinal torque view of a preferred embodiment of the invention
- FIG. 4 is a view of the invention according to the embodiment illustrated in FIG. 3, showing the mounting in separable modules of the tool
- Figures 5 and 6 are views of a screwing tool according to the invention, respectively from above and in longitudinal section
- - Figure 7 is another view of a screwing tool according to the invention; showing the separate transmission and sensor modules
- - Figure 8 is a top view of the sensor module.
- the invention applies to a screwing tool comprising a motor shaft 4 and an angle head 5 whose output shaft 51 has an axis of rotation 511 substantially orthogonal to the axis of rotation. the motor shaft 4.
- the motor shaft 4 and the output shaft 5 are connected in rotation by transmission means.
- these transmission means comprise a conical coupling 2 connecting the drive shaft 4 directly or indirectly with an intermediate gear whose axis of rotation is parallel to the axis of rotation of the output shaft. , this intermediate gear cooperating with the output shaft via another gear carried by the output shaft.
- This conical coupling is brought closer to the engine block incorporating the shaft.
- This conical coupling is, in other words, provided in the vicinity of the end of the motor shaft (or is carried by this end) so that the bulk of it is not detrimental to the accessibility of the angle head in small spaces.
- the conical coupling is remote from the angle head, one or more parallel axis gears to the output shaft being interposed between the output shaft and the conical coupling.
- the conical coupling 2 is mounted at one end of the drive shaft 4 (here constituted by a main body 41 and an extension 42), and a parallel gear train 6 is mounted between the conical coupling 2 and a gear 512 for rotating the output shaft 51.
- the screwing tool thus constituted comprises a reduction chain coupling the motor and the output shaft and that this reduction chain has the conical coupling as input member.
- the tool uses a torque sensor technology described above with reference to the state of the art (that is to say of the type described in the document published under the number DE-I 980 4695). It is recalled that such a sensor comprises:
- strain gauges bonded to the output shaft; an on-board electronic circuit on the output shaft; a rotating transformer.
- the rotating transformer supplies the onboard circuit with a voltage which, once rectified, feeds the strain gage bridge, which itself produces an output signal in the form of a voltage which is converted into a frequency signal by the onboard circuit and then recovered via the rotating transformer.
- a torque sensor of another technology may, however, be implemented according to another possible embodiment.
- the torque sensor is designed as an independent module 7 fixed by two screws to a transmission module 8 of the tool.
- the shaft of this sensor comprises male splines for transmitting the torque, these splines being intended to fit into the gear with parallel teeth 512 (FIG. 3) allowing the transmission of the torque.
- This gear 512 is itself driven by a gear train with parallel teeth, as mentioned above.
- This arrangement makes it possible to maintain a head height comparable to the standard tool, and is much more compact than the tool illustrated in FIG.
- the reduction therefore comprises gear 6 forming a reduction whose ratio is adapted to the level of torque that it is desired to reach as output tool.
- the gears 6 and the conical coupling 2 are integrated in the module 8, itself separable from the engine block 40 as will be explained in more detail later.
- the extension 42 of the motor axis is integrated in the module 8, the latter having an end intended to be housed in the end of the main body 4 of the motor shaft so as to make the main body and the extension solidarity in rotation.
- This module 8 is equipped with sealed ball bearings to contain the grease necessary for the lubrication of the gears.
- This module 8 is also waterproof and independent.
- Fixing the module on the engine block 40 is achieved by three screws 9 distributed at 120 ° and inclined by 15 ° relative to the motor axis (a higher number of screws can of course be considered). This arrangement makes it possible to reduce the external dimensions of this fastener, and allows easy assembly and disassembly, requiring no special wrench or high tightening torque or gluing, assuming the use of a hot-air tool heater. at the time of disassembly.
- FIGS. 6 and 7 illustrate an alternative embodiment of a screwing tool according to the invention.
- the output gear 512 is supported on either side of its toothing (5122) by two ball bearings 52, completely taking up the transmission stresses exerted on the gear 512, these stresses being generated by the intermediate gear train 6. Therefore, the gear 512 does not transmit any bending force to the output shaft (any bending forces on the output shaft being of a nature to disrupt the torque measurement) via the female splines 5121 (of the gear 512) and the male splines 513.
- the output shaft is supported at its lower part by a ball bearing which can alternatively be a rigid ball bearing (as in FIG. 3) or a double row of ball bearings 53 (FIG. 7).
- this bearing is a double-row ball bearing which makes it possible to fully recover the bending forces generated by the outlet bushing on the drive square 514 and thus eliminate external disturbances on the sensor, which would not be the case with a bearing with an oblique contact.
- stop means 531, 532 are provided for diffusing into the housing 70 of the sensor module axial stresses exerted from outside on the square. This avoids transmitting these forces to the active part of the sensor.
- a locking ring 531 is mounted in a groove on the shaft 51, this ring bearing against the inner ring of the bearing 53.
- a second ring stop 532 is mounted in a groove formed inside the housing 70, this ring bearing against the outer ring of the bearing 53.
- the sensor module 7 is designed as an independent module and fixed by two screws 71 to the rest of the tool. This results in obvious advantages for manufacture and maintenance, the sensor module and its internal organs thus being easily accessible and / or replaceable. More specifically, the module 7 comprises a housing 70 having two wings 701 delimiting between them a concave shape for receiving the correspondingly shaped end 81 of the transmission module. These wings 701 provide a seat on the transmission module, and contribute to ensuring the stability of the attachment of the sensor module on the transmission module in the event of lateral or longitudinal impact.
- the holes 711 for receiving the fastening screws 71 are substantially centered with respect to the length L of the casing 70 of the module, contributing, with the general shape of the casing, to the stability of the attachment of the sensor module to the transmission module.
- the power supply of the sensor module and the recovery of the frequency signal is achieved by only two wires that do not require special electromagnetic protection, in view of the sensor technology used. These two son pass through a duct formed in the thickness of the transmission module casing for reasons of mechanical protection.
- the wires are connected to a power supply and a frequency signal processing module, both present in the handle of the tool.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0512212A FR2894172B1 (fr) | 2005-12-01 | 2005-12-01 | Outillage de vissage a tete d'angle, incluant un capteur de couple monte sur l'arbre de sortie, et module de transmission correspondant. |
PCT/EP2006/069145 WO2007063106A1 (fr) | 2005-12-01 | 2006-11-30 | Outil de vissage a tete d'angle, incluant un capteur de couple monte sur l'arbre de sortie, et module de transmission correspondant |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1954447A1 true EP1954447A1 (fr) | 2008-08-13 |
EP1954447B1 EP1954447B1 (fr) | 2012-11-21 |
Family
ID=36826814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06830243A Ceased EP1954447B1 (fr) | 2005-12-01 | 2006-11-30 | Outil de vissage a tete d'angle, incluant un capteur de couple monte sur l'arbre de sortie, et module de transmission correspondant |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100269646A1 (fr) |
EP (1) | EP1954447B1 (fr) |
JP (1) | JP5184368B2 (fr) |
FR (1) | FR2894172B1 (fr) |
WO (1) | WO2007063106A1 (fr) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1394366B1 (it) * | 2009-05-26 | 2012-06-15 | Mg 2 Srl | Metodo ed apparecchiatura per l'avvitamento di aste di siringhe |
US9592600B2 (en) | 2011-02-23 | 2017-03-14 | Ingersoll-Rand Company | Angle impact tools |
US8925646B2 (en) * | 2011-02-23 | 2015-01-06 | Ingersoll-Rand Company | Right angle impact tool |
FR2974320B1 (fr) * | 2011-04-21 | 2014-05-02 | Georges Renault | Visseuse electrique a impulsion. |
EP3007862B1 (fr) | 2013-06-13 | 2022-01-26 | Stanley Black & Decker, Inc. | Système d'outil sans fil |
EP2933061A3 (fr) * | 2014-04-11 | 2015-12-09 | Ingersoll-Rand Company | Outil d'impact d'angle |
SE539469C2 (en) * | 2015-01-21 | 2017-09-26 | Atlas Copco Ind Technique Ab | Method for determining the magnitude of the output torque and a power wrench |
DE102016218841A1 (de) * | 2016-09-29 | 2018-03-29 | Schaeffler Technologies AG & Co. KG | Getriebe mit Drehmomentenmessvorrichtung |
US10034723B2 (en) * | 2016-10-29 | 2018-07-31 | Abdolhossein Mozaffari | Tooth bracket extraction device and methods for extracting a bracket section from teeth |
US9908221B1 (en) | 2017-03-21 | 2018-03-06 | International Business Machines Corporation | Tools with engagement sensors and indicators |
ES2757945T3 (es) * | 2017-04-13 | 2020-04-30 | Johannes Luebbering Gmbh | Dispositivo de atornillamiento y sistema de atornillamiento portátil |
TWI626132B (zh) * | 2017-06-13 | 2018-06-11 | De Poan Pneumatic Corp | Pneumatic hand tool with rotary knocking kinetic energy |
SE541857C2 (en) * | 2018-04-19 | 2019-12-27 | Atlas Copco Ind Technique Ab | A constant-velocity joint assembly and a power tool comprising the same |
FR3090439B1 (fr) | 2018-12-21 | 2020-12-18 | Renault Georges Ets | outil électroportatif équipé d’un transformateur tournant doté de supports de bobine en plasto-ferrite |
DE102019119658A1 (de) * | 2019-07-19 | 2021-01-21 | Pilz Gmbh & Co. Kg | Zykloidgetriebe mit Drehmomenterfassungseinrichtung |
SE544125C2 (en) * | 2019-07-24 | 2022-01-04 | Atlas Copco Ind Technique Ab | Power tool attachment part with a torque sensor detecting radial forces |
SE543291C2 (en) * | 2019-07-24 | 2020-11-17 | Atlas Copco Ind Technique Ab | Power tool attachment part with a torque sensor measuring strain |
EP3771519B1 (fr) * | 2019-08-02 | 2023-03-15 | Johannes Lübbering GmbH | Dispositif de vissage pourvu de moyen de détection intégré |
CN111300322A (zh) * | 2020-03-17 | 2020-06-19 | 广东电网有限责任公司 | 一种电动拧紧工具 |
CN111168615B (zh) * | 2020-03-17 | 2024-05-28 | 广东电网有限责任公司 | 一种电动拧紧装置 |
SE545361C2 (en) * | 2021-08-23 | 2023-07-18 | Atlas Copco Ind Technique Ab | Arrangement for power tool, front part attachment and power tool |
CN115153737B (zh) * | 2022-06-20 | 2024-03-22 | 吉林大学 | 一种医用电动直角螺丝刀 |
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JPS606535B2 (ja) * | 1977-09-07 | 1985-02-19 | 富士チタン工業株式会社 | 磁器組成物 |
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KR100947414B1 (ko) * | 2001-10-15 | 2010-03-12 | 도시바 기카이 가부시키가이샤 | 공구와 공구홀더 및 공작기계 |
GB2383282B (en) * | 2002-04-02 | 2004-06-16 | Crane Electronics | Torque sensing tool |
EP1439035A1 (fr) * | 2002-12-16 | 2004-07-21 | Fast Technology AG | Dispositif de traitement et commande de signaux pour un outil dynamometrique motorisé |
-
2005
- 2005-12-01 FR FR0512212A patent/FR2894172B1/fr not_active Expired - Fee Related
-
2006
- 2006-11-30 EP EP06830243A patent/EP1954447B1/fr not_active Ceased
- 2006-11-30 WO PCT/EP2006/069145 patent/WO2007063106A1/fr active Application Filing
- 2006-11-30 US US12/095,667 patent/US20100269646A1/en not_active Abandoned
- 2006-11-30 JP JP2008542767A patent/JP5184368B2/ja not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2007063106A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2007063106A1 (fr) | 2007-06-07 |
EP1954447B1 (fr) | 2012-11-21 |
FR2894172B1 (fr) | 2008-02-08 |
JP5184368B2 (ja) | 2013-04-17 |
FR2894172A1 (fr) | 2007-06-08 |
US20100269646A1 (en) | 2010-10-28 |
JP2009517234A (ja) | 2009-04-30 |
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