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WO2012114361A1 - Clé hydraulique - Google Patents

Clé hydraulique Download PDF

Info

Publication number
WO2012114361A1
WO2012114361A1 PCT/IT2011/000153 IT2011000153W WO2012114361A1 WO 2012114361 A1 WO2012114361 A1 WO 2012114361A1 IT 2011000153 W IT2011000153 W IT 2011000153W WO 2012114361 A1 WO2012114361 A1 WO 2012114361A1
Authority
WO
WIPO (PCT)
Prior art keywords
movable body
transducer
hydraulic spanner
hydraulic
spanner according
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.)
Ceased
Application number
PCT/IT2011/000153
Other languages
English (en)
Inventor
Silvio GIACOMETTI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SCS Concept Italia SRL
Original Assignee
SCS Concept Italia SRL
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SCS Concept Italia SRL filed Critical SCS Concept Italia SRL
Publication of WO2012114361A1 publication Critical patent/WO2012114361A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/004—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type
    • B25B21/005—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type driven by a radially acting hydraulic or pneumatic piston
    • 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
    • B25B23/0078—Reaction arms
    • 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
    • B25B23/145—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for fluid operated wrenches or screwdrivers
    • B25B23/1456—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for fluid operated wrenches or screwdrivers having electrical components

Definitions

  • the present invention relates to a hydraulically operated spanner for the tightening of screws, bolts and suchlike.
  • Hydraulically operated means operation with an appropriate pressurised liquid, in particular oil.
  • hydraulic spanner systems in which a piston driven by oil pressure acts on a screwing head.
  • a mechanism of an appropriate type for example, a ratchet mechanism, allows the piston to drag, in a rotary manner, the head in the screwing direction (or unscrewing direction if the possibility of reversing the rotation is envisaged) and allows the return of the piston to the opposite position, relieving the pressure and acting on a suitable valve system, and allowing the piston to carry out, under the action of pressure, a new stroke in the screwing direction, until the operation is complete.
  • the pressurised oil is supplied by a pump, appropriately connected, by means of the said valve system, to the cylinder piston.
  • hydraulically operated spanners can also be employed in the field of industrial assembly when it is necessary to ensure precise tightening of the connection elements.
  • the torque is commonly limited by controlling the oil pressure supplied by the pump, for example, reading it on a manometer; automatic pressure limiting devices may also be envisaged, to stop the process when appropriate.
  • the manometer is generally located on the pump, upstream of the piping for connection with the cylinder.
  • the effective transmission of the tightening torque to the element does not exclude the possibility of the latter jamming because of seizure, machining defects or assembly errors, without the tightening being carried out in an effective manner. It would therefore be desirable to allow immediate and reliable recognition of this condition, also in this case, without leading to greater complexity of equipment or operation.
  • a hydraulic spanner for tightening threaded connection elements comprising a fixed body, a movable body having a screwing head, a hydraulic mechanism able to rotate said movable body with respect to said fixed body in a screwing direction, characterized in that said spanner comprises a torque transducer directly applied to said movable body.
  • Torque transducer means any device for measuring the torque transmitted through the movable body to which said transducer is applied by generating an electrical or other type of signal designed to be used by an appropriate detecting device, for example, a display or alarm device, a calculation unit or other similar devices.
  • said movable body has a first end which features said screwing head and a second end opposite the first having a structure for connection of said transducer with an external detection device.
  • said transducer is contained within the fixed body, and can be applied to the movable body, which preferably features a cylindrical portion in correspondence with said portion.
  • said transducer comprises one or more electrical resistance strain gauges, preferably four.
  • the movable body may, according to a further aspect of the invention, comprise one or more channels therein, to allow the passage of connectors between said transducer and said structure.
  • the spanner also comprises a gauge for measuring the angle of rotation of said movable body with respect to said fixed body.
  • figure 1 represents, schematically, a hydraulic spanner in accordance with the present invention from a perspective view
  • figure 2 represents, schematically, a section view according to a plane passing through an axis of symmetry of the movable body of the spanner according to the present invention.
  • the spanner comprises a fixed body 1, in which a movable body 2, shaped substantially like a shaft, is appropriately seated and designed to rotate, under the action of a hydraulic mechanism, around its own axis.
  • the movable body 2 features a screwing head with an appropriate section 3, for example square, hexagonal or other, a head which can be shaped with a form corresponding to the bolt or nut head for which the spanner is intended, or may be designed for use with appropriate adapters for other forms of screw or nut.
  • the head may, if desired, also be interchangeable.
  • the movable body may feature a portion 4 with longitudinal grooves designed to engage with an appropriate socket 5, into which the said embodiment is inserted, rotationally integral therewith; in turn, the socket 5 can be grooved externally to engage with a ratchet mechanism contained in an appropriate lever, operated by a movable piston in a hydraulic cylinder machined directly onto the fixed body 1.
  • Alternative embodiments can also be designed, for example with the movable body operated directly by a lever and ratchet mechanism.
  • the movable body 2 can be secured, in an axial direction, within the fixed body, in an appropriate manner.
  • said movable body can be fixed, by means of bolts or flanges or circlips, to the socket 5, or bushings, bearings or other means may be envisaged.
  • the spanner can be achieved in a similar way to the commonly known technique, with all variations possible depending on needs.
  • the spanner according to the present invention comprises a torque transducer 8 applied in an appropriate manner to said movable body.
  • said spanner may comprise one or more (preferably four) electrical resistance strain gauges applied to said movable body.
  • said strain gauges are applied to the exterior of a portion 9 of the movable body designed for this application: for example, said portion can have a smooth external surface, without teeth, designed to engage with the hydraulic mechanism, if present, and a diameter which may be smaller than the portions designed for engagement with the mechanism so as to leave sufficient space between the movable body and the other spanner structures, for example the socket stated above, if present.
  • the strain gauges can be applied and connected, in an appropriate manner known to technicians in the field, to measure the torque transmitted by a shaft, which may be the movable body, according to a preferred embodiment.
  • said portion suitable for application of the transducer is contained within the fixed body. This allows to the transducer to be integrated with the spanner, without increasing the overall dimensions thereof.
  • the movable body features, on the opposite end to the screwing head, a structure for connection of the transducer to a data detection and/or processing device.
  • the structure may comprise a sleeve 10 of insulating material, for example a plastic material which bears, on the surface thereof, annular contacts 11, arranged in an essentially reciprocally parallel fashion on the external surface of the sleeve, in order to allow contact between the movable body and a manifold during rotation.
  • the manifold 12 may feature a series of brushes 13, one per contact, said brushes being equipped with springs or another appropriately mounted system to promote contact.
  • the manifold can be, according to a possible aspect of the invention, mounted on a support 14, preferably shaped like a box, fixed to the spanner, to the fixed body for example, by means of appropriately provided slots and screws.
  • the box can, according to a possible aspect of the invention, hold the ends of the movable body.
  • channels can be machined into the movable body for the passage of conductors, for example, insulated electrical wires.
  • a channel 16 can be machined along the axis of the movable body, connected to the surface thereof, in correspondence with the transducer and the connection structure, by radial holes.
  • the spanner also comprises a gauge 15 for measuring the screwing angle, capable of detecting the rotation of the movable body.
  • said gauge can be fixed to said support.
  • the gauge can be of a known type, mechanical, optical or otherwise, and fitted in an appropriate manner.
  • said gauge may feature a shaft 17, whose rotation is designed to detect, which can be inserted, according to a preferred aspect, directly into the open end of the channel 16.
  • grooves and corresponding projections may be envisaged on both parts, or a grub screw in a through hole in the movable body, or another means.
  • the presence of the gauge allows the screwing angle to be detected in relation to the torque developed, which allows possible jamming or anomalies to be detected, which would not be detectable by simply measuring the torque.
  • the use of a transducer, in accordance with the present invention allows a valid use in association with the gauge, because of the precision thereof.
  • the detection of the torque by measuring the oil pressure according to the commonly known technique, is not sufficiently precise and is subject to delays due to the inertia of the system, which would not allow good results in the association between the two sets of data.
  • the manifold and the gauge can be connected to a logic unit (not shown) for the detection, signalling and/or processing of data, designed to show the data measured or processed and/or to emit signals, either of a visual nature, for example by means of a display unit or signal lights, or audio signals, related to the completed tightening or the occurrence of anomalies.
  • a logic unit not shown for the detection, signalling and/or processing of data, designed to show the data measured or processed and/or to emit signals, either of a visual nature, for example by means of a display unit or signal lights, or audio signals, related to the completed tightening or the occurrence of anomalies.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valve Device For Special Equipments (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

L'invention concerne une clé hydraulique servant à serrer des éléments de raccordement filetés, comportant un corps fixe (1), un corps mobile (2) ayant une tête de vissage (3), un mécanisme hydraulique en mesure de faire tourner ledit corps mobile par rapport audit corps fixe dans une direction de vissage, caractérisée en ce que ladite clé comporte un transducteur de couple (8) appliqué directement sur ledit corps mobile. La clé comporte de préférence une jauge (15) pour mesurer l'angle de vissage.
PCT/IT2011/000153 2011-02-25 2011-05-16 Clé hydraulique Ceased WO2012114361A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2011A000286 2011-02-25
IT000286A ITMI20110286A1 (it) 2011-02-25 2011-02-25 Chiave idraulica

Publications (1)

Publication Number Publication Date
WO2012114361A1 true WO2012114361A1 (fr) 2012-08-30

Family

ID=43976188

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2011/000153 Ceased WO2012114361A1 (fr) 2011-02-25 2011-05-16 Clé hydraulique

Country Status (2)

Country Link
IT (1) ITMI20110286A1 (fr)
WO (1) WO2012114361A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019122920A1 (fr) * 2017-12-21 2019-06-27 Hire Torque Limited Outil destiné à être utilisé dans des lieux à accès restreint
EP3895845A1 (fr) * 2020-04-17 2021-10-20 BoltingMaster Co., Ltd. Clé dynamométrique hydraulique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0164574A2 (fr) * 1984-05-15 1985-12-18 Deutsche Gardner-Denver GmbH & Co Dispositif de vissage
US5172616A (en) * 1990-10-13 1992-12-22 Teac Corporation Torque wrench
EP2113341A2 (fr) * 2001-07-07 2009-11-04 Paul-Heinz Wagner Visseuse sous pression

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0164574A2 (fr) * 1984-05-15 1985-12-18 Deutsche Gardner-Denver GmbH & Co Dispositif de vissage
US5172616A (en) * 1990-10-13 1992-12-22 Teac Corporation Torque wrench
EP2113341A2 (fr) * 2001-07-07 2009-11-04 Paul-Heinz Wagner Visseuse sous pression

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019122920A1 (fr) * 2017-12-21 2019-06-27 Hire Torque Limited Outil destiné à être utilisé dans des lieux à accès restreint
US11697192B2 (en) 2017-12-21 2023-07-11 Enerpac Uk Ltd Tool for use in places with restricted access
EP3895845A1 (fr) * 2020-04-17 2021-10-20 BoltingMaster Co., Ltd. Clé dynamométrique hydraulique

Also Published As

Publication number Publication date
ITMI20110286A1 (it) 2012-08-26

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