EP0240931B1 - Clé dynamométrique - Google Patents

Clé dynamométrique Download PDF

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Publication number
EP0240931B1
EP0240931B1 EP19870104859 EP87104859A EP0240931B1 EP 0240931 B1 EP0240931 B1 EP 0240931B1 EP 19870104859 EP19870104859 EP 19870104859 EP 87104859 A EP87104859 A EP 87104859A EP 0240931 B1 EP0240931 B1 EP 0240931B1
Authority
EP
European Patent Office
Prior art keywords
housing
supporting foot
groove
leg
torque wrench
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.)
Expired - Lifetime
Application number
EP19870104859
Other languages
German (de)
English (en)
Other versions
EP0240931A1 (fr
Inventor
Gustav Frohn
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.)
Enerpac Tool Group Corp
Original Assignee
Applied Power Inc
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 Applied Power Inc filed Critical Applied Power Inc
Publication of EP0240931A1 publication Critical patent/EP0240931A1/fr
Application granted granted Critical
Publication of EP0240931B1 publication Critical patent/EP0240931B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B25B23/0078—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
    • 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

Definitions

  • the invention relates to a power wrench with a housing in which a clamping lever is held pivotably by at least one piston about a pivot axis perpendicular to its direction of movement and with which a support leg for deriving the counter-torque when screwing onto an external abutment relative to the housing at an angle of 90 ° to the direction of movement of the piston is adjustably connected.
  • the invention is therefore based on the object of designing a power wrench of the type mentioned at the outset in such a way that the possibility of a simple and rapid change in the position and in particular the effective length of the support foot without changing its direction of action can be achieved with little manufacturing effort and with full preservation of the connection strength can be preserved.
  • the invention provides a secure and non-rotatable connection between the housing and the support foot, and it enables a simple change in the position of the support foot, in particular also perpendicular to Direction of movement of the piston for the pivoting of the clamping lever and thus to the screwing direction and a quick exchange of the support foot for another.
  • the invention leads to simplifications for the manufacture of the housing with regard to the support foot mounting.
  • the power wrench shown in Fig. 1 has a housing 1 in which a working piston 5 is guided in a longitudinally displaceable manner in an axial bore, which can be acted upon by a hydraulic connection 18 with driving force, and then undergoes an adjustment to the right. With this adjustment, the working piston 5 works on the head of a tensioning lever 4 which is held in the housing 1 so as to be pivotable about an axis of rotation 11 which, in practical use of the power screwdriver, coincides with the central axis of a nut or screw to be tightened or loosened. They are limited by the pivoting movement of the tensioning lever 4 triggered by the adjustment of the working piston 5 by means of a stop piece 7 adjoining the cylinder part of the housing 1.
  • a reset piston 13 is also held, which has the same active axis as the working piston 5 and is acted upon by a return spring 31 after relieving the working piston 5 from the hydraulic pressure, the pivoting back of the clamping lever 4 about the axis of rotation 11.
  • a tensioning wheel 6 is mounted coaxially to the axis of rotation 11 in the tensioning lever 4, which via a spring-loaded drive pawl 9 is taken, but does not change its rotational position during the return movement of the clamping lever 4.
  • This tensioning wheel 6 contains in its center coaxial to the axis of rotation 11 a square hole 8 which serves as a connection to the screw or nut to be tightened or loosened. This connection can be made either directly via the square hole 8 itself or with the interposition of a socket 12, as shown in Fig. 2.
  • the housing 1 contains a recess 2 which passes through the housing 1 in its full width transversely to the direction of displacement of the working piston 5 in the axial bore in the housing 1 receiving it.
  • this recess 2 has the shape of a lying bone with a larger longitudinal extension in the direction of movement of the working piston 5 and end extensions.
  • a threaded bore 3 opens into the recess 2 parallel and perpendicular to the direction of movement of the working piston 5, both of which each extend to the outside of the housing 1.
  • the recess 2 in the housing 1 serves as a receptacle and holder for a support leg 10, with clamping screws 34 which can be screwed into the threaded bores 3 to fix it on the housing 1 and which act on the support leg 10 with their inner ends and in the recess 2 in the recess hold the desired position.
  • the support leg 10 is in the form of an L in the illustrated embodiment, and it has a longer leg 14 and a shorter leg 16, as shown in FIG. 2. With the longer leg 14, the support leg 10 can be inserted more or less far into the recess 2 in the housing 1, for which purpose the cross section of the leg 14 is adapted to that of the recess 2. In this way, the support foot 10 can be adjusted with a precise fit relative to the housing 1, while maintaining its angular position relative to the housing 1.
  • the direction of the two legs 14 and 16 of the support foot 20 relative to one another corresponds to the orientation the longitudinal direction of the recess 2 in the housing 1 relative to the axial bore for the working piston 5.
  • the recess 2 runs perpendicular to the axial bore for the working piston 5, that is to say perpendicular to its direction of movement, and accordingly the two legs 14 and 16 also extend in the L-shape of the support leg 10 perpendicular to each other.
  • the device according to the invention is a power wrench in which, with the help of an adjustable support foot, the counter-torque that occurs during the screwing operation with the piston-operated pivoting of a tensioning lever with a ratchet-like tensioning wheel can be derived from an external abutment.
  • the support foot in the housing of the power screwdriver is received and held in a continuous recess, which specifies a fixed angular position relative to the housing for the support foot, but permits adjustment of the support foot, in particular, transversely to the active axis of the working piston for the screwing process.
  • the shape of a bone with extended ends or a dumbbell is preferred, the larger cross section extending expediently parallel to the direction of movement of the working piston for the pivoting lever pivoting.
  • the recess penetrates the housing perpendicular to this direction of movement, and the support foot has the shape of an L with mutually perpendicular legs, one of which is accommodated in the recess in the housing, while the other can be attached to the outer abutment, intermediate pieces, if necessary can be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Surgical Instruments (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Ladders (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Claims (8)

  1. Clé dynamométrique ayant une boîte (1),
    - dans laquelle un levier tendeur (4) est tenu dans une manière pivotable par au moins un piston (5, 13) autour d'un axe de pivot (11) perpendiculaire à la direction de mouvement de celui-ci
    et
    - avec laquelle un pied de support (10) pour transférer le moment de réaction en vissant à un aboutissement extérieur est connecté dans une manière ajustable sous un angle de 90° relatif à la direction de mouvement du piston (5),
    caractérisée en ce
    que la boîte (1) comprend une gorge (2) la traversant complètement avec un axe longitudinal courant parallèlement à la direction de l'axe de pivot (11) du levier tendeur (4) pour recevoir le pied de support (10)
    et
    que le pied de support (10) a la forme d'un L ayant une jambe (14) première capable d'être introduisée dans la gorge (2) dans la boîte (1) ajustable selon l'axe longitudinal de celle-ci et d'être fixée dans celle-ci et une jambe (16) seconde capable d'être engagée avec l'aboutissement extérieur.
  2. Clé dynamométrique selon la revendication 1, caractérisée en ce
    que la gorge (2) dans la boîte (1) a une section transversale ayant une longueur plus grande parallèle à la direction de la jambe (16) du pied de support (10) capable d'être engagée a l'aboutissement extérieur.
  3. Clé dynamométrique selon la revendication 2, caractérisée en ce
    que la gorge (2) dans la boîte (1) a, dans la section transversale, la forme d'un os ayant des bouts élargis.
  4. Clé dynamométrique selon une ou plusieurs des revendications 1 à 3, caractérisée en ce
    que les deux jambes (14 et 16) du pied de support (10) s'étendent rectangulairement l'une relatif à l'autre.
  5. Clé dynamométrique selon une ou plusieurs des revendications 1 à 4, caractérisée en ce
    que la jambe (14) première du pied de support (10) est plus longue que la jambe (16) seconde de celui-ci.
  6. Clé dynamométrique selon une ou plusieurs des revendications 1 à 5, caractérisée en ce
    que le pied de support (10) est capable d'être fixé dans la gorge (2) dans la boîte (1) par au moins un serre-fils (34).
  7. Clé dynamométrique selon la revendication 6, caractérisée en ce
    qu'au moins deux serres-fils (34) sont prévus pour fixer le pied de support (10) dans la gorge (2) dans la boîte (1) ayant leurs directions d'activité s'étendant perpendiculairement l'une relatif à l'autre.
  8. Clé dynamométrique selon la revendication 6 ou 7, caractérisée en ce
    que la boîte (1) comprend au moins un trou (3) fileté s'étendant perpendiculairement à la gorge (2) pour recevoir les serres-fils (34).
EP19870104859 1986-04-04 1987-04-02 Clé dynamométrique Expired - Lifetime EP0240931B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3611368 1986-04-04
DE19863611368 DE3611368A1 (de) 1986-04-04 1986-04-04 Kraftschrauber

Publications (2)

Publication Number Publication Date
EP0240931A1 EP0240931A1 (fr) 1987-10-14
EP0240931B1 true EP0240931B1 (fr) 1991-11-13

Family

ID=6297962

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870104859 Expired - Lifetime EP0240931B1 (fr) 1986-04-04 1987-04-02 Clé dynamométrique

Country Status (3)

Country Link
EP (1) EP0240931B1 (fr)
DE (2) DE3611368A1 (fr)
ES (1) ES2027984T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3719893A1 (de) * 1987-06-13 1988-12-29 Wagner Paul Heinz Hydraulischer kraftschrauber
JPH03196977A (ja) * 1989-12-15 1991-08-28 John K Junkers パワーレンチ
DE4210511C2 (de) * 1992-03-31 1994-06-16 Wagner Paul Heinz Druckmittelbetätigter Kraftschrauber
DE4210512C2 (de) * 1992-03-31 1994-04-28 Wagner Paul Heinz Druckmittelbetätigter Kraftschrauber
WO2019036550A1 (fr) * 2017-08-16 2019-02-21 HYTORC Division Unex Corporation Appareil de serrage d'éléments de fixation filetés

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2559327A1 (de) * 1975-12-31 1977-07-14 Guenter Trautmann Hydraulik - kraftschluessel
DE3131582A1 (de) * 1981-08-10 1983-02-24 Hubert Prof. Dr.-Ing. 8000 München Kurz Vorrichtung zum drehen von radschrauben

Also Published As

Publication number Publication date
DE3774466D1 (de) 1991-12-19
EP0240931A1 (fr) 1987-10-14
ES2027984T3 (es) 1992-07-01
DE3611368A1 (de) 1987-10-08

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