EP0094444A1 - Dispositif de serrage d'écrous, en particulier au-delà de la limite d'élasticité avec commande d'angle de rotation - Google Patents

Dispositif de serrage d'écrous, en particulier au-delà de la limite d'élasticité avec commande d'angle de rotation Download PDF

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Publication number
EP0094444A1
EP0094444A1 EP82104347A EP82104347A EP0094444A1 EP 0094444 A1 EP0094444 A1 EP 0094444A1 EP 82104347 A EP82104347 A EP 82104347A EP 82104347 A EP82104347 A EP 82104347A EP 0094444 A1 EP0094444 A1 EP 0094444A1
Authority
EP
European Patent Office
Prior art keywords
housing tube
rotation
handle
angle
tightening
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
EP82104347A
Other languages
German (de)
English (en)
Other versions
EP0094444B1 (fr
Inventor
Klaus Neuhaus
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.)
Stahlwille Eduard Wille GmbH and Co KG
Original Assignee
Eduard Wille GmbH and Co KG
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 Eduard Wille GmbH and Co KG filed Critical Eduard Wille GmbH and Co KG
Priority to AT82104347T priority Critical patent/ATE29116T1/de
Priority to EP82104347A priority patent/EP0094444B1/fr
Priority to DE8686104361T priority patent/DE3279323D1/de
Priority to DE8282104347T priority patent/DE3278489D1/de
Publication of EP0094444A1 publication Critical patent/EP0094444A1/fr
Application granted granted Critical
Publication of EP0094444B1 publication Critical patent/EP0094444B1/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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/142—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
    • B25B23/1422—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters
    • B25B23/1427—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters by mechanical means

Definitions

  • the present invention relates to a device for tightening a screw connection, consisting of a housing tube with a head piece for connection to the screw connection and a handle, wherein a device for adjusting and signaling a torque is arranged within the housing tube and a device for measuring the angle of rotation when Tighten the screw connection after the joining torque has been reached.
  • a screwing tool of the type described has a disc with an angular scale arranged coaxially with the axis of rotation of the tool holder and with a display marking interacting with the angle scale, the disc having the angle scale and the display marking being coaxially rotatable with respect to the axis of rotation of the socket and on the one hand connected in a rotationally locking manner to the screwing tool and on the other hand against rotating are securely held on the workpiece.
  • this known screwing tool has the advantage that only a single tool is required to tighten the screw connection beyond the yield point, tightening is only possible up to the stopping point, ie until the joining torque is reached.
  • the disc must first be set to the desired angle of rotation, and only then can it be tightened further.
  • the tightening process must therefore be interrupted for additional manipulations.
  • must be followed up during the tightening process as it may be necessary for reasons of space or because of the working posture of the operator and why z. B. a ratchet is provided, the partial rotation angle reached in each case is read off before the follow-up and the disk is adjusted to the remaining rotation angle before moving on. This requires a considerable amount of time, especially when repeated, and can lead to tightening errors.
  • this tool cannot be used for screw connections that are difficult to access and where there is only a small space for tightening, since the angle washer requires a considerable amount of space and, moreover, space is also required to adjust the angle washer by hand to be able to.
  • the present invention is based on the object of improving a device of the type described in the introduction in such a way that the tightening of the screw connection up to the joining torque, i.e. up to the starting point of the rotation angle measurement and the further tightening exceeding the yield point can be carried out in a continuous tightening process by means of the rotation angle control and a repeated follow-up during tightening has no influence on the display of the actual rotation angle.
  • the device should be compact, so that even difficult-to-access screw connections can be tightened with it, and good readability in the area of the handle of the screw device is possible.
  • the torque device is connected to the angle of rotation device in such a way that the angle of rotation device is triggered when the joining torque is reached.
  • the invention is therefore based on the basic idea that the part of the torque device that is usually used to indicate the reaching of a certain torque, for example by the appearance of a symbol or by generating a sound, is used to automatically measure the angle of rotation trigger so that the tightening can continue without interruption.
  • the present invention relates to an advantageous device for setting and signaling a predetermined torque and to a device for measuring and displaying the angle of rotation when tightening screw connections.
  • the device according to the invention for tightening a screw connection comprises both a torque device and a rotation angle device and enables the joint use of both devices for the tightening of screw connections across stretch limits with the aid of the rotation angle control in a continuous tightening process, i.e. the tightening with the joining torque and the further tightening an angle ⁇ in the plastic area of the screw can be done in one tightening process without stopping and stopping, wherein the device according to the invention can be used to immediately read that the desired angle of rotation has been reached and, moreover, the respective desired joining torque for advance can be set in advance up to the starting point of the angle of rotation measurement.
  • This torque device according to the invention consists of a housing tube 1 of preferably rectangular cross section.
  • an insertion tool 2 can be inserted, which can be designed as a ratchet, square or ring or open-end wrench tool. This results in a large variety of variations.
  • a handle 3 pivotally mounted in the housing tube 1. The pivotable mounting of the handle 3 is carried out by parallel guidance via two pairs of levers from levers 4, 6, so that the levers 4 and 6 of each pair are mounted at the ends in the handle.
  • the levers 4, 6 are articulated on a connecting body 7 which is fastened to the housing tube 1 on the latter.
  • the handle 3 is U-shaped in cross-section and includes with the free U-legs 8 the connecting body 7 and the associated end 9 of the housing tube 1, the end 9 also having a U-shaped cross-section and the height of the free vertical U- Leg corresponds approximately to half the height of the housing tube 1.
  • the arrangement described allows a parallel pivoting of the handle 3, which in the starting position is limited by the vertical edge of the housing tube 1 and in the end position by the horizontal edges of the U-legs of the housing tube end 9 becomes.
  • a bending rod 11 Arranged within the handle 3 is a bending rod 11, preferably designed as a flat spring, which is attached at one end to the upper bearing axis 12 of the pivot lever 4 and at the other end in an adjusting slide 13.
  • the adjusting slide 13 is guided in the handle 3 so as to be displaceable perpendicular to the longitudinal axis of the handle .
  • a setting screw 16 runs through a threaded bore 14 of the adjusting slide 13 and bears at one end against a contact surface 17 in the handle 3 and preferably has an internal hexagon at the opposite end for actuation.
  • the bending rod 11 When tightening the screw connection, the bending rod 11 is pivoted together with the handle 3 until the handle abuts the U-leg of the housing tube end 9 in the end position. In the course of this pivoting movement, the bending rod 11 comes to rest against a stop 18, after which the handle 3 can only be pivoted up to the end position against the resistance of the bending rod.
  • the stop '18 is formed by a screw bolt, which is screwed in the connecting body 7 and whose distance is adjustable by the bending rod.
  • 11 Preferably is the stop 18 in the region of the center of the B iege- rod 11 and parallel to the displacement direction according to the arrow Y.
  • the force required to overcome the respective resistance is applied to the handle 3 and generates a size-dependent torque in the screw connection to be tightened via the housing tube 1 acting as a force arm.
  • the desired tightening torque or joining torque can be preset in each case.
  • a visible or audible signal is triggered, for example, if the device according to the invention is used as a pure torque wrench or, if it is also used for the angle-controlled, cross-limit tightening, the triggering of a rotation angle measuring device, which continues is described below.
  • a compression spring 25 mounted in the connecting body 7, which rests against the bending rod, the handle 3 is reset when it is released into its initial position.
  • the trigger mechanism consists of a trigger lever 2 1 , which is pivotally mounted in a bearing block 22 of the connecting body 7, preferably approximately in the middle.
  • a compression spring 23 the ER between the lever end and the V is arranged connection body 7, so that the release lever 21 occupy about an axis extending parallel to the longitudinal axis of the housing tube position corresponding to the Corresponds to the starting position before actuation.
  • a release stop 24 is screwed into the handle 3, the distance to the release lever in the starting position of the handle being adjusted so that after the end position of the handle is reached, the release lever is thereby pivoted into the release position.
  • the front switching end of the trigger lever 21 fulfills the actual triggering function, for example for an optical or acoustic signal. In the advantageous exemplary embodiment shown, an angle measuring and display device is triggered thereby.
  • the present invention also extends to a device for measuring and displaying the angle of rotation when tightening a screw connection.
  • the invention relates both to this device alone and in connection with the above-described torque-controlled triggering device.
  • the rotation angle measuring and display device according to the invention consists of a head gear 26 which can be rotated about a vertical rotation axis Z in the front end of the housing tube 1.
  • the vertical rotation axis Z coincides with the rotation axis of a screw connection to be tightened, which is not shown.
  • a square 27 can be inserted coaxially into the gear 26, on which a lever arm 28
  • a magnet 29 is preferably attached to an angled end of the lever arm 28 so as to be rotatable about the axis of the angled end. This magnet 29 is used for the non-positive fixing of the lever arm 28, for. B. on a housing which has the screw connection to be tightened. Instead of the positive connection, there can also be a positive connection. As a result, the starting position for the rotation angle measurement is fixed at the same time, since the lever arm 28 is connected to the head gear 26 in a rotationally fixed manner via the square 27.
  • the rotation of the head gear relative to the housing tube is thus a measure of the angle of rotation of the screw connection to be tightened.
  • a toothed belt 31 which is in engagement with the head gear 26, the relative rotation of the head gear 26 is preferably transmitted in a ratio of 1: 1 to an angle display device, as described below.
  • the bearing body 34 is slidably mounted in the housing tube, namely against the pressure of a coil spring 35, so that the toothed belt is always tensioned evenly.
  • each rotary movement of the head gear is now transmitted to the shaft 44 of an angle indicator 37.
  • the connecting rod 36 is rotatably mounted with the deflecting gear and the angle indicator 37, but is displaceable in the longitudinal direction and can also compensate for slight inclinations, so that offsets and assembly inaccuracies, as well as twisting of the housing tube, can be compensated for and thus impairments of the movement transmission can be avoided.
  • the connecting rod 36 is formed at its ends as a flat edge which is guided in a slot 38, the slots 38 being formed in extensions 39, 41 of the deflection gear 33 and the shaft 44 of the angle indicator 37. The flat edge ends are held in the slots of the extensions 39, 41 in a rotationally locking manner by compression springs 42.
  • the scale drum when the housing tube 1 is rotated counter to the tightening direction, for example when using a ratchet insert 2, which allows repeated tightening in small angular steps, the scale drum does not rotate back, but instead remains in the position reached, so that the Addition of the individual angular steps is also carried out on the scale drum.
  • the release lever 21 After the tightening process and release of the handle 3, the release lever 21 returns to its starting position and is ready to lock.
  • the zero point can be adjusted by first pivoting the reset disk 52 by hand via the actuating pin 57 in the direction IV against the spring force of the compression spring 59, the scale drum 43 not being carried along, but the frictional force of the reset disk against the permanent magnet 49 being overcome.
  • both the lock of the freewheel 46 and the frictional force between the permanent magnet and the drive bushing 47 offer greater resistance.
  • the resetting disk is pushed back in the direction III by the spring force of the compression spring 59, both the permanent magnet with the scale drum being carried by the resetting disk and the drive disk by the permanent magnet in the freewheeling direction.
  • the reset can be carried out in several steps until the locking lug rests on the release lever.
  • the inventive device is characterized in that it can be very made compact, so a d ss also are difficult to access may be readily employed. It can also be used to carry out the tightening process that exceeds the yield point by means of rotation angle control in one tightening process without stopping or stopping. The critical angle of rotation can be easily read, since the angle of rotation display is located away from the screw connection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Dowels (AREA)
  • Forging (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
EP82104347A 1982-05-18 1982-05-18 Dispositif de serrage d'écrous, en particulier au-delà de la limite d'élasticité avec commande d'angle de rotation Expired EP0094444B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT82104347T ATE29116T1 (de) 1982-05-18 1982-05-18 Vorrichtung zum anziehen einer schraubverbindung, insbesondere zum streckgrenzueberschreitenden anziehen mittels drehwinkelsteuerung.
EP82104347A EP0094444B1 (fr) 1982-05-18 1982-05-18 Dispositif de serrage d'écrous, en particulier au-delà de la limite d'élasticité avec commande d'angle de rotation
DE8686104361T DE3279323D1 (en) 1982-05-18 1982-05-18 Device for fastening screws above the yield point
DE8282104347T DE3278489D1 (en) 1982-05-18 1982-05-18 Device for fastening screws, in paricular above the yield point with angle of rotation control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82104347A EP0094444B1 (fr) 1982-05-18 1982-05-18 Dispositif de serrage d'écrous, en particulier au-delà de la limite d'élasticité avec commande d'angle de rotation

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP86104361.0 Division-Into 1982-05-18

Publications (2)

Publication Number Publication Date
EP0094444A1 true EP0094444A1 (fr) 1983-11-23
EP0094444B1 EP0094444B1 (fr) 1987-08-26

Family

ID=8189038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104347A Expired EP0094444B1 (fr) 1982-05-18 1982-05-18 Dispositif de serrage d'écrous, en particulier au-delà de la limite d'élasticité avec commande d'angle de rotation

Country Status (3)

Country Link
EP (1) EP0094444B1 (fr)
AT (1) ATE29116T1 (fr)
DE (2) DE3278489D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0849049A1 (fr) * 1996-12-21 1998-06-24 Eduard Wille GmbH & Co. Outil de manoeuvre avec dispositif de mesure d'angles pour le serrage d'écrous
CN112509412A (zh) * 2020-12-17 2021-03-16 南京机电职业技术学院 一种工业用高效智能培训装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889729A (en) * 1955-12-28 1959-06-09 Orner Harry Apparatus for screw tensioning to elongation values
DE1603768B1 (de) * 1968-01-27 1971-12-23 Daimler Benz Ag Vorrichtung zum Anziehen von Schrauben eines Schraubenverbandes
FR2133324A5 (fr) * 1971-04-16 1972-11-24 Daimler Benz Ag
DE2520918B1 (de) * 1975-05-10 1976-08-19 Hazet Werk Zerver Hermann Vorrichtung zum anziehen einer schraubverbindung
DE2843406A1 (de) * 1978-10-05 1980-08-28 Hazet Werk Zerver Hermann Vorrichtung zum drehwinkelgesteuerten anziehen einer schraubverbindung
DE2914287A1 (de) * 1979-04-09 1980-11-06 Richard Abr Herder Gmbh & Co Schraubwerkzeug

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889729A (en) * 1955-12-28 1959-06-09 Orner Harry Apparatus for screw tensioning to elongation values
DE1603768B1 (de) * 1968-01-27 1971-12-23 Daimler Benz Ag Vorrichtung zum Anziehen von Schrauben eines Schraubenverbandes
FR2133324A5 (fr) * 1971-04-16 1972-11-24 Daimler Benz Ag
DE2520918B1 (de) * 1975-05-10 1976-08-19 Hazet Werk Zerver Hermann Vorrichtung zum anziehen einer schraubverbindung
DE2843406A1 (de) * 1978-10-05 1980-08-28 Hazet Werk Zerver Hermann Vorrichtung zum drehwinkelgesteuerten anziehen einer schraubverbindung
DE2914287A1 (de) * 1979-04-09 1980-11-06 Richard Abr Herder Gmbh & Co Schraubwerkzeug

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0849049A1 (fr) * 1996-12-21 1998-06-24 Eduard Wille GmbH & Co. Outil de manoeuvre avec dispositif de mesure d'angles pour le serrage d'écrous
CN112509412A (zh) * 2020-12-17 2021-03-16 南京机电职业技术学院 一种工业用高效智能培训装置
CN112509412B (zh) * 2020-12-17 2022-06-14 南京机电职业技术学院 一种工业用高效智能培训装置

Also Published As

Publication number Publication date
EP0094444B1 (fr) 1987-08-26
DE3279323D1 (en) 1989-02-09
ATE29116T1 (de) 1987-09-15
DE3278489D1 (en) 1988-06-16

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