EP3321034A1 - Outil de type clé pour le montage de vis sans tête et analogues - Google Patents

Outil de type clé pour le montage de vis sans tête et analogues Download PDF

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Publication number
EP3321034A1
EP3321034A1 EP16726349.0A EP16726349A EP3321034A1 EP 3321034 A1 EP3321034 A1 EP 3321034A1 EP 16726349 A EP16726349 A EP 16726349A EP 3321034 A1 EP3321034 A1 EP 3321034A1
Authority
EP
European Patent Office
Prior art keywords
stud
radius
transmission element
torque
mouth
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
Application number
EP16726349.0A
Other languages
German (de)
English (en)
Other versions
EP3321034B1 (fr
Inventor
Guillermo Petri Larrea
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.)
Individual
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Individual
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Publication date
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Publication of EP3321034A1 publication Critical patent/EP3321034A1/fr
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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
    • B25B23/02—Arrangements for handling screws or nuts
    • B25B23/08—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
    • B25B23/10—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means
    • B25B23/103—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means for gripping threaded studs
    • 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
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same

Definitions

  • the invention generally relates to a wrench type tool intended for the mounting of studs/bolts, threaded rods and similar items and, more specifically, to securely hold in place or maintain the tightening torque applied to the stud/bolt when such tool is removed from the stud which has been already mounted at the relevant connection of parts.
  • a stud/bolt is a set screw comprising two fully or partially threaded ends, which is used to couple two pieces that must be held together under a specific torque.
  • Such studs/bolts may show different configurations, as it is sufficiently known in the current art.
  • a technical problem arisen when a stud/bolt is mounted by means of a wrench type tool relates to the maintenance of the position and/or torque desired for the connection, since the studs/bolts are dragged during the removal of the tool, and this entails their unfastening or the loss of the desired position.
  • FIGS. 1A to 1E show different examples of studs/bolts that have been machined to allow them to remain in position during the removal of the tightening tool according to the current art.
  • Document ES U234480 discloses a tool for the removal of studs and similar elements which could also be used for the assembly operation, comprising a socket piece for its coupling to the stud and bullet-shaped pressure means that can be clamped along the lateral surface of the stud, during the removal operation, or released once the stud has been removed. The use of this applies a pressure on the stud thread, which could eventually damage such thread.
  • a tool is known in the market, which is used to remove stud, threaded rods, screws with damaged heads, etc., sold by the company WURTH.
  • This tool comprises a tube with an unfastening end where the unfastening torque is applied, as well as an eccentric connection which enters the tube and presses against the surface of the stud.
  • the thread may also be damaged, impairing, or even preventing, the subsequent use of the said stud.
  • one object of the invention is to develop a wrench type tool which allows to solve the problem arisen, ensuring that, when it is removed from the already mounted stud/bolt, the position and/or torque applied to such stud/bolt are not modified, and that the fastening force/torque is only applied axially, to uniformly distribute the torque along the threaded section of the stud.
  • a wrench type tool for the mounting of studs and similar items which can be used to mount a stud or similar item which comprises at least a fully or partially threaded end, such tool being characterised in that:
  • the fourth portion of the cylindrical upper section is threaded with a second thread pitch which is larger than the first thread pitch, and that the transmission piece comprises an outer thread, so that it can be screwed to the fourth portion of the cylindrical upper section.
  • the coupling/uncoupling means consist of an assembly comprising an orthogonally arranged pin protruding from the side surface of the transmission element and a oblong hole inclined on the neck portion of the mouth element, to allow the movement of such pin.
  • the pin of the transmission element and the said transmission element have been provided as separate pieces.
  • the upper end of the transmission element is arranged as a hub, to allow the coupling of tightening tools, such as a manually-operated, electrical, or pneumatic tools.
  • the free end of the end stem of the centering stop is arranged to tightly fit against the end of the stud to be mounted.
  • the free end of the end stem of the centering stop is configured with a concave, convex or flat shape, or with a flat shape with a central tip or a conical tip, that can be tightly fitted to a stud/bolt respectively, manufactured by hot pressing, cold pressing, saw-cutting, machining and shearing.
  • the wrench type tool which is generally designated by reference numeral (1), comprises a coaxial assembly with a mouth portion (2) wherein the stud (E) to be mounted is coupled, a transmission element to convey the tightening force/torque (3) and a centering stop (4) arranged so that it can slide inside the mouth portion, to lock/unlock the stud through the operation of the transmission element (3) with the help of coupling/uncoupling means (5) that are correspondingly provided, at it will be explained in more detail hereinafter.
  • the exterior part of the mouth element (2) respectively comprises cylindrical mouth (20) and neck (21) portions, coaxially arranged, with an inner through compartment (22) extending between such mouth and neck portions.
  • the said inner compartment (22) comprises, following an axial symmetric pattern relative to one axis, (X):
  • the transmission element (3) comprises an upper end (30) wherein the tightening force/torque is applied, and a lower end (31) to convey such force to the stud to be mounted.
  • the said upper end (30) is arranged as a hub (33) wherein a tightening tool, for instance, a manually operated, electrical or pneumatic tools can be coupled.
  • the centering stop (4) comprises a head (40), of an appropriate size to tightly rest on the third portion (2230) of the upper section (223) of the mouth portion (2) and an end stem (41) extending from the intermediate section (221) to the lower section (220) of the said mouth portion (2), so that, thanks to its axial movement, it ends may rest against the end (E1) of the stud (E) to be mounted.
  • the coupling/uncoupling means (5) comprise an assembly formed by an orthogonally arranged pin (32) protruding from the side surface of the transmission element, (3) and an oblong hole (23) inclined on the neck section (21) of the mouth element (2) wherein the pin may slide within said hole (23) as it will be explained in greater detail hereinafter.
  • the said coupling/uncoupling means (5) may be configured according to an any other arrangement, provided that their rotation in a first direction of rotation (G1) allows that the lower end (31) of the transmission element (3) rests against the head (40) of the centering stop (4), moving it so that the end stem (41) is resting against the stud (E) and the tightening force/torque applied on the upper end (30) of the transmission element is conveyed to the mouth element (2) wherein such stud has been screwed; and that the rotation of the said coupling/uncoupling means (5) in a second direction of rotation (G2), which is opposite to the first direction of rotation allows that the transmission element (3) no longer rests against the centering stop (3), so that such centering stop no longer presses the stud to be mounted and the untigthening torque applied to the transmission element is applied to the mouth element, thus unscrewing the stud.
  • G1 first direction of rotation
  • G2 second direction of rotation
  • the free end of the end stem (41) of the centering stop (4) is arranged so that it is tightly fitted against the end (E1) of the stud (E) to be mounted.
  • its end (410) may be either concave or convex, for hot- or cold-pressed studs/bolts, as it is shown in figures 7A and 7B , respectively, or flat, with a small tip for machined studs/bolts, as shown in figure 7C , or completely flat, for saw-cut studs/bolts, as it has been represented in figure 7D , or completely conical, for sheared studs/bolts, as shown in figure 7E .
  • Figure 3 shows a second embodiment of the invention, which differs from the embodiment shown in figure 2 only because the fourth portion (2231) of the cylindrical upper section (223) is threaded with a second thread pitch (P2) which is smaller than the first thread pitch (P1) and the transmission element (3) is threaded, so that it can be coupled to the said thread with the second thread pitch of said fourth portion (2231) of the cylindrical upper section (223).
  • P2 second thread pitch
  • Figure 4 shows the so-called "neutral" position of the tool (1) according to the second embodiment of the invention, which has not been still applied to the stud (E) to be mounted.
  • the transmission element (3) is partially screwed within the third portion (2231) of the mouth element (2), so that its lower end is facing, but without being in contact with, the head (40) of the centering stop (4) and being the end stem (41), passing through the intermediate section (221) of the mouth element (2) scarcely penetrating by its free end inside the lower section (220) of said mouth element.
  • the transmission element (3) becomes rotably engaged to the stud to be mounted, and the tightening torque applied to its upper section (30) may be conveyed to the stud to be mounted, thanks to the friction clutch between the centering stop (4) and the stud (E).
  • the tightening torque is uniformly distributed along the threading of the stud, which is critical in the case of torque and torque-and-angle assemblies.
  • the tool (1) according to the invention may be removed or detached from the stud without causing the untightening/displacement of such stud/bolt.
  • the transmission element (3) rotates following the second direction of rotation (G2), it no longer presses against the centering stop (4) so that such centering stop does no longer forcibly rest against the already mounted stud (E), and consequently, such rotation is no longer conveyed to said stud, and when the transmission element (3) continues with its rotation following said second direction of rotation (G2), its pin (32) butts against the opposite end of the oblong hole (23), so that the mouth element (2) is pulled and unscrews from the already mounted stud (E), as previously mentioned, without exerting any unfastening torque on the mounted stud.
  • this operation is possible because the second thread pitch (P2) of the threaded coupling of the torque transmission element (3) is smaller than the first thread pitch (P1) of the threaded coupling of the lower portion (220) of the mouth element (2) and the threaded end (E1) of the stud to be mounted, and because the tightening force/torque has an axial component, apart from the fastening torque.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Electric Cable Installation (AREA)
  • Mirrors, Picture Frames, Photograph Stands, And Related Fastening Devices (AREA)
EP16726349.0A 2015-05-07 2016-05-05 Outil pour le montage de goujons et des articles similaires Active EP3321034B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201530624A ES2589167B1 (es) 2015-05-07 2015-05-07 Útil tipo llave para montado de espárragos y similares
PCT/ES2016/070344 WO2016177928A1 (fr) 2015-05-07 2016-05-05 Outil de type clé pour le montage de vis sans tête et analogues

Publications (2)

Publication Number Publication Date
EP3321034A1 true EP3321034A1 (fr) 2018-05-16
EP3321034B1 EP3321034B1 (fr) 2020-07-29

Family

ID=56096647

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16726349.0A Active EP3321034B1 (fr) 2015-05-07 2016-05-05 Outil pour le montage de goujons et des articles similaires

Country Status (4)

Country Link
EP (1) EP3321034B1 (fr)
ES (2) ES2589167B1 (fr)
PT (1) PT3321034T (fr)
WO (1) WO2016177928A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB125298A (en) * 1918-08-01 1919-04-17 Edwin John Lane A New or Improved Tool for Inserting and Withdrawing Stud and Stay Bolts.
US1536320A (en) * 1924-10-02 1925-05-05 Apex Machine Co Automatic stud driver and releasing mechanism
US2351232A (en) * 1942-03-18 1944-06-13 Schnabolk Samuel Stud setting and removing tool
US3769861A (en) * 1972-05-04 1973-11-06 A Kisle Stud wrench
US4106178A (en) * 1976-12-10 1978-08-15 Seletyn James P Threaded stud driving tool
DE10340266A1 (de) * 2003-05-06 2004-11-25 Johannes Franzen Vorrichtung zum Ein- und/oder Ausdrehen von Stehbolzen sowie Stehbolzenrotationsvorrichtung

Also Published As

Publication number Publication date
PT3321034T (pt) 2020-10-13
ES2826379T3 (es) 2021-05-18
EP3321034B1 (fr) 2020-07-29
WO2016177928A1 (fr) 2016-11-10
ES2589167B1 (es) 2017-07-28
ES2589167A1 (es) 2016-11-10

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