EP0035165B1 - Outil rotatif - Google Patents

Outil rotatif Download PDF

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Publication number
EP0035165B1
EP0035165B1 EP81101132A EP81101132A EP0035165B1 EP 0035165 B1 EP0035165 B1 EP 0035165B1 EP 81101132 A EP81101132 A EP 81101132A EP 81101132 A EP81101132 A EP 81101132A EP 0035165 B1 EP0035165 B1 EP 0035165B1
Authority
EP
European Patent Office
Prior art keywords
ring
teeth
channel
rotary tool
catch element
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
Application number
EP81101132A
Other languages
German (de)
English (en)
Other versions
EP0035165A1 (fr
Inventor
Karl Richard Hirtsiefer
Johann Müller
Kurt Walterscheid
Paul-Heinz Wagner
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
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT81101132T priority Critical patent/ATE4095T1/de
Publication of EP0035165A1 publication Critical patent/EP0035165A1/fr
Application granted granted Critical
Publication of EP0035165B1 publication Critical patent/EP0035165B1/fr
Expired 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
    • 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 turning tool with a rotary head in which a ring carrying a toothing is mounted and which contains a locking element engaging in the toothing of the ring, which leads in one direction of rotation of the ring over its toothing and engages in the other direction of rotation blocking it .
  • the locking element has the task of transferring a reciprocating rotary movement of the rotary head to the ring in such a way that the ring is only carried in one direction of rotation of the rotary head, but remains stationary during the reverse rotation phase. It is therefore a backstop or ratchet.
  • ratchets usually have a ratchet tooth, which is articulated in the rotary head and runs in the idle direction over the tips of the teeth of the ring, but engages in a tooth gap in the driving direction and in this way causes a rotation of the ring together with the rotary head .
  • the object of the invention is to provide a turning tool in which the backstop or ratchet takes up little space within the turret, so that the dimensions of the turret are not significantly increased by the backstop, but large torques, i.e.. H. Driving moments to be transferred.
  • the invention provides that the locking element is supported by a push rod movable in a channel of the rotary head via a first joint, and that the push rod is supported on the rear end wall of the channel via a second joint and, together with the locking element, a toggle linkage forms.
  • the backstop With this design of the backstop, only the components involved are subjected to pressure. There is no bending stress, torsional stress or shear. Since the cross-sectional dimensions of the parts can be kept relatively small with this type of loading of the compressive stress, the backstop can be realized overall with small dimensions and relatively light.
  • the orientation of the longitudinal axis of the channel with respect to the ring or to the recess of the rotary head receiving the ring is important.
  • the elongated central axis of the channel intersects a radius of the ring at a right angle at a point which is approximately in the middle of this radius.
  • the interface can also be between the middle and two thirds of the length of this radius - measured from the center of the ring.
  • At least one of the joints has a ball, which partly rests in a dome-shaped recess of the push rod and partly in a dome-shaped recess of the locking element or the rear end wall of the channel.
  • the locking element preferably has a base part adapted to the circumferential circle of the toothing of the ring and at least one locking tooth projecting from the base part.
  • the movement of the base part is limited by the wall of the channel, the channel must have such a width that the base part can deflect so far that its locking tooth releases the toothing of the ring.
  • the rear end wall of the channel is formed by a plug which is adjustable in a thread. In this way, a fine adjustment of the length of the channel is possible.
  • the push rod can adjust itself freely due to its support on joint balls within the channel, without being subjected to any constraining forces.
  • the push rod adjusts itself in such a way that the best possible distribution of forces results under pressure loading and no additional bending moments, and above all no shear forces occur.
  • a gearwheel is mounted on the key head, which meshes with a toothing of the ring and can be rotated in one direction of rotation independently of an actuation of the piston-cylinder unit.
  • the power wrench shown has a key head 10 which has a substantially circular recess 11 in which a ring 12 is rotatably mounted.
  • the ring 12 is cylindrical on its outer surface and there it has an outer toothing 13 in the central region of its length.
  • the ring 12 has cylindrical bearing surfaces 14 and 15 on both sides of the outer toothing 13.
  • the inside of the ring 12 is designed as a hexagonal channel 16 or as another non-circular inner profile. For example, a key socket can be inserted into the hexagon channel 16, which can be connected to the ring 12 in a rotationally fixed manner in this way.
  • the key head 10 which surrounds the ring 12 over a considerable part of the circumference, has a circumferential inner groove 17 which offers space for receiving the external toothing 13 of the ring 12.
  • the surfaces 11 located on both sides of the annular groove 17 run on the bearing surfaces 14 and 15 of the ring 12, so that the key head 10 and the ring 12 are centered relative to one another.
  • the key head 10 has a radially projecting shoulder 18 which contains the cylinder bore 19 of the piston-cylinder unit 20 and a ratchet 21.
  • the key head 10 is, with the exception of the extension 18, enclosed by the support ring 22 of the support element 23.
  • the support ring 22 is U-shaped in cross section, the end faces of its legs sliding on the bearing surfaces 14, 15 of the ring 12.
  • the support ring 22 surrounds the key head 10, but has an opening for the passage of the extension 18.
  • the support element 23 consists of a plate which extends approximately tangentially to the key head 10 or to the ring 12 and which forms a U-shaped structure with the side plates 24. As FIG. 1 shows, the extension 18 projects between the side plates 24 of the support element 23.
  • the piston 25 is displaceable in the cylinder bore 19 of the extension 18.
  • the piston is sealed with seals 26 against the cylinder wall and has on its rear side a spherical recess 27 into which a suitable steel ball 28 is inserted.
  • the piston rod 29 presses against the steel ball 28 and also has a dome-shaped recess 30 at its front end. In this way, the steel ball 28, together with the dome-shaped recesses 27 and 30, forms a joint to be stressed.
  • a similar joint is located at the other end of the piston rod 29.
  • This joint consists of a ball 31, which is seated in a spherical recess 32 of the end of the piston rod 29 and a spherical recess 33 of the support element 23.
  • the piston rod 29 is surrounded by a cylindrical jacket 34 which is firmly connected to the piston 25.
  • the end of the cylinder bore 19 is closed by a bush 35 and sealed with seals 36 with respect to the jacket 34.
  • the cylinder of the piston-cylinder unit 20 is designed as a double-acting cylinder and is connected to a first connecting line 37 and a second connecting line 38.
  • the first connection line 37 When the first connection line 37 is pressurized, the second connection line 38 serves as a return line and vice versa.
  • the first connection line 37 leads into the rear end of the cylinder bore 19 and the second connection line 38 into the front end of the cylinder bore 19.
  • the lines leading to the connections are not shown.
  • the jacket 34 is connected to the support element 23 by a spring (not shown) in order to prevent the extension 18 and the support element from being pivoted apart.
  • the distances of the balls 28 and 33 from the center of the ring 12 and the key head 10 are approximately the same:
  • the piston 25 is extended (to the left according to FIG. 2).
  • the support member 23 is placed against a fixed abutment (not shown)
  • the lug 18 is rotated clockwise around the center of the ring 12.
  • the point of application of the pressure at the extension 18 lies in the center 40 of the end face of the cylinder bore.
  • the distance of the point 40 from the center of the ring 12 is not significantly greater than the distance of the ball 31 from the center of the ring 12, so that the piston-cylinder unit effectively pushes the support element 23 and the arm 18 apart.
  • It consists of a toothed segment 41, which is accommodated in a cavity 42 of the key head 10 and engages with its teeth in the external toothing 13 of the ring 12.
  • the toothing segment 41 has on its rear side along a sloping shoulder a dome-shaped recess 43 into which a ball 44 is inserted.
  • the ball also projects into a dome-shaped recess 45 on the end face of a pressure piece 46.
  • the rear end of the pressure piece 46 is also supported on a screw 50 by a ball 47, which is seated in two spherical caps 48, 49.
  • the pressure piece 46 is accommodated in a bore 51 of the extension 18. The outer end of this hole is threaded and closed with the screw 50.
  • the inner end of the bore 51 opens into the cavity 42.
  • the bore 51 extends so that the extension of its axis intersects the circle of the external teeth 13 of the ring 12 as a secant. This secant runs somewhat outside the center of the radius perpendicular to it.
  • the toothed segment 41 can be released from the engagement of the external toothing 13.
  • the pressure piece 46 with the joints formed by the balls 44 and 47 acts as a toggle mechanism by which the toothed segment 41 is pressed into the toothing 13. In this way, when the key head 10 is turned clockwise, the ring 12 is carried along via the ratchet 21.
  • a gear 55 is mounted inside the key head, which meshes with the external toothing 13 of the ring 12.
  • the gear 55 is freely rotatable on the key head 10 and is in engagement with a further gear 56, which is also mounted on the key head 10.
  • the second gear 56 has an inner square 57, into which a tool can be inserted in order to manually turn the ring 12. In this way it is possible to tighten screws with a low torque before the actual tightening takes place by the piston-cylinder unit 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Gripping On Spindles (AREA)
  • Drilling Tools (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Claims (6)

1. Outil de tournage avec une tête rotative où est disposée une bague (12) portant une denture et qui contient un élément d'arrêt (41) venant en prise dans la denture de la bague (12), lequel, dans une direction de rotation de la bague (12) glisse sur sa denture et dans l'autre direction de rotation vient en prise dans celle-ci de façon à la bloquer, caractérisé par le fait que l'élément d'arrêt (41) est supporté par une tige de compression (46) mobile dans un canal (51) de la tête rotative (10) par l'intermédiaire d'une première articulation (43, 44,45) et par le fait que la tige de compression (46) est supportée, par une deuxième articulation (47, 48, 49), sur la paroi frontale (50) dirigée vers l'arrière du canal (51), et forme, avec l'élément d'arrêt (41) une* tige de levier à genouillère (21).
2. Outil de tournage selon la revendication 1, caractérisé par le fait que l'axe médian prolongé du canal (51) coupe un rayon de la bague (12) à angle droit à un emplacement qui se trouve au voisinage du milieu de ce rayon.
3. Outil de tournage selon la revendication 1, caractérisé par le fait que l'axe médian prolongé du canal (51) coupe un rayon de la bague (12) à angle droit à un emplacement qui se trouve entre le milieu et les deux tiers de la longueur de ce rayon, en mesurant à partir du centre de la bague.
4. Outil de tournage selon l'une des revendications précédentes, caractérisé par le fait qu'au moins l'une des articulations (47 à 49, 43 à 45) présente une bille (44, 47) qui repose, d'une part, dans un évidement (45, 48) en forme de calotte de la tige de compression (46) et, d'autre part, dans un évidement (43 ou 49) en forme de calotte de l'élément d'arrêt (41) ou respectivement de la paroi frontale (50) dirigée vers l'arrière du canal (51).
5. Outil de tournage selon l'une des revendications 1 à 4, caractérisé par le fait que l'élément d'arrêt (41) présente une partie de base adaptée à la périphérie de la denture (13) de la bague (12), d'où fait saillie plusieurs dents d'arrêt et par le fait que la denture (13) de la bague (12) et les dents d'arrêt de l'élément d'arrêt (41) constituent des dentures fines de précision.
6. Outil de tournage selon l'une des revendications 1 à 5, caractérisé par le fait que la paroi frontale (50) tournée vers l'arrière du canal (51) est formée d'un bouchon pouvant être déplacé dans un filetage.
EP81101132A 1980-03-05 1981-02-17 Outil rotatif Expired EP0035165B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81101132T ATE4095T1 (de) 1980-03-05 1981-02-17 Drehwerkzeug.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3008381 1980-03-05
DE19803008381 DE3008381A1 (de) 1980-03-05 1980-03-05 Drehwerkzeug

Publications (2)

Publication Number Publication Date
EP0035165A1 EP0035165A1 (fr) 1981-09-09
EP0035165B1 true EP0035165B1 (fr) 1983-07-13

Family

ID=6096308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81101132A Expired EP0035165B1 (fr) 1980-03-05 1981-02-17 Outil rotatif

Country Status (4)

Country Link
EP (1) EP0035165B1 (fr)
JP (1) JPS56139883A (fr)
AT (1) ATE4095T1 (fr)
DE (2) DE3008381A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4524651A (en) * 1981-04-03 1985-06-25 Paul-Heinz Wagner Power wrench
DE3113482A1 (de) * 1981-04-03 1982-10-28 Wagner, Paul-Heinz, 5203 Much "kraftschrauber"
DE3113481A1 (de) * 1981-04-03 1982-10-28 Wagner, Paul-Heinz, 5203 Much "kraftschrauber"
DE3407126A1 (de) * 1984-02-28 1985-08-29 Enerpac GmbH, 4300 Essen Kraftschrauber mit einem, eine feinstufige verzahnung aufweisenden spannrad
DE3413202A1 (de) * 1984-04-07 1985-10-17 Wagner, Paul-Heinz, 5203 Much Kraftschrauber
DE3420446A1 (de) * 1984-06-01 1985-12-05 Applied Power, Inc., Milwaukee, Wis. Kraftschrauber mit einem kraftarm und einem vorzugsweise als gehaeuse ausgebildeten reaktionsarm
US6148694A (en) * 1997-11-06 2000-11-21 Spirer; Steven E. Hand wrench with torque augmenting means
DE19951606C1 (de) * 1999-10-26 2001-03-15 Peter Neef Drehwerkzeug
CN108724067B (zh) * 2017-04-24 2020-06-09 华伟工具有限公司 无切换钮的换向式棘轮扳手

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD62789A (fr) *
US2787180A (en) * 1945-04-27 1957-04-02 Thomas P Walker Open end ratchet wrenches
US2752810A (en) * 1954-09-21 1956-07-03 Ingersoll Rand Co Power operated ratchet wrench
DE1731995U (de) * 1955-02-21 1956-10-11 Wilhelm Baecker Fa Ratsche mit quer verstellbarem ratschenkopf und hilfshebel.
DE2529818C3 (de) * 1975-07-04 1977-12-22 Wagner Paul Heinz Motorgetriebener freilaufschluessel
CA1060238A (fr) * 1976-11-22 1979-08-14 Glenn F. Depagter Entrainement de cle a rochet mecanique

Also Published As

Publication number Publication date
JPS56139883A (en) 1981-10-31
ATE4095T1 (de) 1983-07-15
DE3160578D1 (en) 1983-08-18
EP0035165A1 (fr) 1981-09-09
JPH034354B2 (fr) 1991-01-22
DE3008381A1 (de) 1981-09-10

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