EP2529890A2 - Clé dynamométrique - Google Patents

Clé dynamométrique Download PDF

Info

Publication number
EP2529890A2
EP2529890A2 EP12169243A EP12169243A EP2529890A2 EP 2529890 A2 EP2529890 A2 EP 2529890A2 EP 12169243 A EP12169243 A EP 12169243A EP 12169243 A EP12169243 A EP 12169243A EP 2529890 A2 EP2529890 A2 EP 2529890A2
Authority
EP
European Patent Office
Prior art keywords
handle
torque
tool shank
longitudinal axis
clamping unit
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
EP12169243A
Other languages
German (de)
English (en)
Other versions
EP2529890B1 (fr
EP2529890A3 (fr
Inventor
Thomas Beyert
Andreas Risse
Peter Welp
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.)
Hazet Werk Hermann Zerver GmbH and Co KG
Original Assignee
Hazet Werk Hermann Zerver 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 Hazet Werk Hermann Zerver GmbH and Co KG filed Critical Hazet Werk Hermann Zerver GmbH and Co KG
Publication of EP2529890A2 publication Critical patent/EP2529890A2/fr
Publication of EP2529890A3 publication Critical patent/EP2529890A3/fr
Application granted granted Critical
Publication of EP2529890B1 publication Critical patent/EP2529890B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 invention relates to a torque tool, in particular rotation angle / torque wrench, according to the features in the preamble of claim 1.
  • Screw connections require the application of a defined tightening torque to ensure a secure and durable connection.
  • special screwdriving tools are also used as torque tools in the form of angle or torque wrenches. Their operation provides that when the usually adjustable torque is reached, a noticeable and / or audible signal is triggered for the user. In this way, in addition to a too loose connection of the components consequently also over-tightening the screw effectively prevented.
  • the respective tightening torque can also be visually displayed continuously via scales or digital representations.
  • the triggering types have a clamping unit, usually arranged on the inside, via which the required release torque is adjustable.
  • the clamping unit for this purpose a spring-loaded release, which is usually in operative relationship with a couplable with the fitting tool.
  • the preload and relaxation is usually done via rotational movements, which are displaced by which parts of the clamping unit and compress the spring designed as a spiral spring axially or relax.
  • rotational movements which are displaced by which parts of the clamping unit and compress the spring designed as a spiral spring axially or relax.
  • a torque tool in the form of a torque wrench, which has a tubular tool shank and arranged on an end portion of the tool shank handle.
  • the clamping unit required for clamping the coil spring is in this case arranged within the handle.
  • the handle In order to generate the necessary rotational movement for adjusting the triggering moment, the handle is rotatably mounted on the tool shank. By the displacement of the handle in the direction of the longitudinal axis of the tool shank against a restoring force, the rotational movement is transmitted to the clamping unit.
  • the respective length of the helical spring thus determines the set tightening torque, which can be read via a scale arranged on the tool shank.
  • an extremely compact and easy-to-use handling torque tool is shown, which is used to set the respective triggering moment only the required components for such a torque wrench anyway.
  • torque tools offer room for improvement in terms of ease of adjustment.
  • the present invention is based on the object to improve a torque tool of the type described above in such a way that the adjustability of the tightening torque on the rotation of the handle for the user is made more comfortable.
  • a torque tool in particular Drehwinkel- / torque wrench is shown, which has a tool shank and arranged in a known manner at an end portion of the tool shaft handle.
  • the handle is rotatably mounted about the longitudinal axis of the tool shaft.
  • a clamping unit Within the handle and / or the tool shank is a clamping unit, via which the respective triggering torque is adjustable by turning the handle relative to the tool shank.
  • the handle is displaceable on the tool shank in the direction of the longitudinal axis, whereby the handle is displaceable from a rest position into a setting position provided for setting the triggering moment. It is conceivable that a coupling between the handle and clamping unit takes place only by the axial displacement. Preferably, however, the coupling is permanent, with an adjustment is possible only in the setting position. In the rest position, however, there is a blockage the handle against the clamping unit, which prevents unintentional adjustment.
  • the handle has a locking means to fix the handle in its adjusted position.
  • the particular advantage is the fact that the adjustment of the clamping unit initially makes a displacement of the handle in the longitudinal direction required, this setting position, however, must not be held by force or that after grasping during twisting again not a displacement of the handle in the Setting position must be performed.
  • the locking means By the locking means, the handle is moved as needed from its rest position to the adjusted position in which it is then fixed.
  • the clamping unit In the adjustment position, the clamping unit can be actuated via the handle, so that only a comfortable twisting of the handle is required to set the triggering torque. Even when gripping during the rotation of the handle this remains in its adjusted position, so that concentrates the entire force required for adjusting the twist.
  • the fixing of the adjustment position takes place both in the direction in which the spring of the clamping unit is tensioned, d. H. when increasing the torque, as well as in the direction in which the spring is relaxed, d. H. when reducing the torque.
  • the locking means After reaching the tightening torque to be set, the locking means is released again, so that the handle is automatically shifted back over its restoring force from its setting position to its rest position.
  • the clamping unit comprises an adjusting ring which can be rotated via the handle.
  • the adjusting ring has at least one cam, which corresponds to at least one arranged on the handle undercut.
  • the adjustment ring a total of four cams, which are each arranged offset by 90 degrees circumferentially on the adjusting ring.
  • the handle preferably has four undercuts, which are arranged within the handle and correspond with the cam.
  • the locking means is formed by the at least one cam and the at least one undercut. The locking is caused by the fact that the cam engages behind the undercut, so that a movement in the longitudinal direction of the handle is inhibited and the handle is fixed in its setting position.
  • the handle has at least one groove extending in the direction of the longitudinal axis of the tool shank.
  • the groove serves to ensure that at least part of the clamping unit is guided in the groove until reaching the setting position of the handle.
  • the adjusting ring of the clamping unit is guided over its at least one cam in the groove. Due to the connection between the handle and at least part of the clamping unit, these are at least partially connected to each other and guided defined in their possible movement possibility.
  • the handle has at least one recess, which is preferably located within the handle.
  • the undercut is formed by a transverse to the direction of the longitudinal axis extending part of the recess.
  • the groove opens into the recess, wherein the recess is made wider in relation to the groove and thus forms the undercut in the transition region between the groove and the recess.
  • the undercut can extend at an angle smaller or greater than 90 degrees to the longitudinal axis, this preferably forms a right angle with respect to the course of the groove.
  • the invention provides that the recess has a projection arranged in extension of the groove.
  • the projection is thus arranged within the recess and constitutes a structural resistance spaced from the transitional region of the groove to the recess.
  • the projection delimits the handle in its displacement from the rest position into the setting position.
  • the adjusting ring and the handle are preferably displaced in the longitudinal direction relative to one another, so that the cams guiding the adjusting ring emerge from the groove and terminate the relative displaceability in the longitudinal direction when the projection is reached.
  • the handle has a rotary knob, which is rotatable from a blocking position to an open position.
  • the knob is disposed at the end of the handle and rotatable about the longitudinal axis.
  • the center of the rotary knob and the longitudinal axis lie on each other.
  • the handle is blocked in the blocking position of the rotary knob with respect to its displacement in the setting position.
  • the open position of the knob allows a displacement of the handle from its rest position to the set position.
  • the displacement of the handle in the longitudinal direction can in principle be limited by the striking of the knob on the adjusting ring.
  • the projection described above can then be omitted.
  • a preferred embodiment provides that at least one nose is arranged on the front side of the rotary knob.
  • the adjusting ring of the clamping unit has at least one pocket corresponding to the nose.
  • the nose in the open position of the knob by the displacement of the handle in its setting position with the pocket of the adjusting ring is engageable.
  • the knob itself is in this case rotatable relative to the handle, but set in the direction of the longitudinal axis of the handle.
  • the axial displacement of the handle relative to the tool shaft occurs, with the knob within the handle following the movement and engaging with its nose into the pocket of the adjustment ring.
  • a torque tool which offers a very comfortable handling for the user with respect to the adjustability of the respective triggering moment.
  • the arrangement of the locking means within the handle becomes a before mechanical stress and dirt Protected system shown, over which the handle is fixable in its setting position. Without the need to trigger the lock, for example via a knob or a rotary ring thus the entire handle is available to enable or disable the adjustability of the respective triggering moment.
  • difficult conditions which are present, for example, dirty tool, so no filigree elements are used to adjust the respective release torque.
  • FIG. 1 shows a torque tool 1 according to the invention in a perspective view.
  • This is an adjustable torque wrench in the present case.
  • the torque tool 1 has a tubular Tool shank 2, which extends in its longitudinal direction X.
  • a handle 3 is arranged, which is mounted around the longitudinal axis X in the direction X1 rotatably mounted on the tool shank 2.
  • the handle 3 is coupled to a clamping unit, not shown in the interior of the handle 3 and / or tool shank 2.
  • a helical compression spring is tensioned or relieved, in a manner not shown, via which the respective applied tightening torque is preset.
  • a scale 4 is arranged, which may have not shown in detail numerical information about the currently set torque.
  • the transition region B is tapered with respect to the tool shank 2, wherein it is reduced in its cross section.
  • the handle 3 opens into a circumferential rim 5 which bears tightly against the transitional region B of the tool shank 2. Due to the possible rotational movement of the handle in the direction of X1, the ring 5 is displaced together with the handle 3 in a manner not shown in the direction of the longitudinal axis X limited.
  • the rim 5 has a circumferentially extending grid 6 with further numerical information. The respective position of the free edge of the ring 5 relative to the scale 4 of the tool shank 2 reveals the currently set tightening torque. In combination with screening 6, this information is additionally specified.
  • the handle 3 to the rim 5 toward an annular collar 7, which has a relation to the handle 3 1.5 times to 2 times larger diameter.
  • the collar 7 serves to clearly define a grip area 8 of the handle 3, which is available for grasping with the hand of a user.
  • the collar 7 serves to allow the user's hand to rest on it, effectively preventing any slippage in the direction of the longitudinal axis X.
  • the handle 3 at its opposite end of the collar 7 has a circumferential thickening 9 relative to the handle portion 8. This also serves to limit the grip area 8 and the secure guidance of the hand of the respective user.
  • the end portion A opposite end portion C of the tool shank 2 is used for coupling with a tool head, not shown, which serves to accommodate also not shown tools, usually Aufstecknadore.
  • the otherwise circular in cross-section tool shank 2 is flattened at its end portion C, so that forms a rectangular opening 10 at the end.
  • the opening 10 has two opposite parallel extending long walls 10a, which are interconnected by correspondingly short walls 10b. The transition between the long walls 10a and the short walls 10a is rounded.
  • the handle 3 is displaceable relative to the tool shank 2 in the direction of the longitudinal axis X. During the displacement of the rim 5 remains in its respective position, so that the handle 3 on the rim 5 in the direction of the longitudinal axis X is displaceable. In this case, the handle 3 is during use of the torque tool 1 in its rest position X2, from which it is displaced by displacement in the direction of the longitudinal axis X out in a setting position X3.
  • FIG. 2 shows a detail of the handle 3 in the region of its end-side thickening 9.
  • the handle 3 is partially cut in the region of its thickening 9 and releases the view into its interior.
  • the handle 3 has a cylindrical cavity 11 at the end.
  • the cavity 11 serves to receive a likewise substantially cylindrical rotary knob 12.
  • the visible in the inserted state of the rotary knob 12 in the cavity 11 of the handle 3 part has two recesses 13, between which a tangible web 14 is arranged.
  • the web 14 serves to rotate the rotary knob 12 about the longitudinal axis X from a blocking position D1 to an open position D2.
  • the rotary knob 12 circumferentially on two opposing slots 15, which correspond with pins not shown here within the cavity 11 of the handle 3.
  • the slots 15 serve to limit the rotary knob 12 in its rotatability about the longitudinal axis X around.
  • the rotary knob 12 at its end opposite the web 14 on two lugs 16, of which in the present case only one can be seen.
  • an adjustment ring 17 is shown as part of the clamping unit.
  • the adjusting ring 17 has two opposite depressions in the form of pockets 18, which correspond to the lugs 16 of the rotary knob 12.
  • the adjusting ring 17 is mounted on an axis 19 extending in the direction of the longitudinal axis X and fixed by a nut 20.
  • the adjusting ring 17 has circumferentially each offset by 90 degrees cam cams 21, which are guided in grooves 22 within the handle 3.
  • a coil spring 23 is arranged, which causes a corresponding restoring force between the adjusting ring 17 and the knob 12 and thus the handle 3.
  • FIG. 3 illustrates the assembled state of handle 3 and knob 12. In compliance with the FIGS. 2 and 3 It is clear that the knob 12 is currently in its blocking position D1, so that its lugs 16 do not engage in the pockets 18 of the adjusting ring 17.
  • FIG. 4 shows the knob 12 in its open position D2.
  • the knob 12 is rotated by 90 degrees about the longitudinal axis X, so that its lugs 16 can engage in the pockets 18 of the adjusting ring 17.
  • the handle 3 has been moved in a manner not shown here relative to the Werkzsugschaft 2 in the longitudinal direction of its rest position X2 in the setting position X3 shown here.
  • the set relative to the tool shank 2 in the longitudinal direction X adjustment ring 17 is thereby moved with its cam 21 from the grooves 22 out.
  • the movement takes place counter to the restoring force of the coil spring 23.
  • FIG. 5 illustrates the meshing of cam 21 of the knob 12 and pockets 18 of the adjusting ring 17.
  • the adjusting ring 17 is shown cut in this area, so that the nut 20 is visible.
  • FIG. 6 shows the cavity 11 of the handle 3 without the otherwise arranged therein components such as adjusting ring 17 and coil spring 23 and knob 12. In this view, it is clear how the grooves 22 are arranged within the handle 3.
  • the grooves 22 meet in their extension to the projection 24. Furthermore, the handle 3 within its cavity 11 also four circumferential recesses 25, within which the respective projection 24 is arranged.
  • the recess 25 has over the groove 22 has a greater width, which in the present case corresponds to three times the width of the groove 22.
  • an undercut 26 is formed in the transition region between the groove 22 and the recess 25 in each case to the right and left side of the groove 22, with which the cam 21 of the adjusting ring 17, which is not shown here, correspond. Due to the symmetrical design, d. H. Characterized in that on both sides of the groove 22, an undercut 26 is provided, the setting position X3 can be held regardless of the direction of rotation.
  • FIG. 7 illustrates the interaction of undercut 26 and cam 21 of the adjusting ring 17 in detail.
  • the holding function becomes active when the cam 21 emerges from the groove 22 and is brought into the recess 25 behind its undercut 26 via a rotational movement running about the longitudinal axis X. The rotational movement is possible until the cams 21 abut against the side walls 27 of the recess 25.
  • the rotary knob 12 is first rotated by its locking position D1 by 90 degrees in the open position D2.
  • the previously blocked displaceability of the handle 3 relative to the tool shaft 2 is made possible, in which the lugs 16 of the rotary knob 12 and the pockets 18 of the adjusting ring 17 are in a common alignment.
  • the handle 3 is displaced from its rest position X2 in the direction of the longitudinal axis X relative to the tool shank 2 in its setting position X3. The displacement of the handle 3 takes place counter to the restoring force of the coil spring 23.
  • the cams 21 of the adjusting ring 17 are guided in the grooves 22 of the handle 3 until they leave them and reach the region of the recesses 25.
  • the relative displaceability of the handle 3 is terminated when the cams 21 abut against the projections 24 or when the adjusting ring 17 abuts against the knob 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP12169243.8A 2011-05-30 2012-05-24 Clé dynamométrique Active EP2529890B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201120050282 DE202011050282U1 (de) 2011-05-30 2011-05-30 Drehmomentwerkzeug

Publications (3)

Publication Number Publication Date
EP2529890A2 true EP2529890A2 (fr) 2012-12-05
EP2529890A3 EP2529890A3 (fr) 2014-12-31
EP2529890B1 EP2529890B1 (fr) 2016-07-06

Family

ID=44502145

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12169243.8A Active EP2529890B1 (fr) 2011-05-30 2012-05-24 Clé dynamométrique

Country Status (4)

Country Link
EP (1) EP2529890B1 (fr)
CN (1) CN102962802B (fr)
DE (1) DE202011050282U1 (fr)
ES (1) ES2585837T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI660819B (zh) 2018-07-27 2019-06-01 特典工具股份有限公司 扭力扳手
DE202021102127U1 (de) * 2021-04-21 2022-07-22 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentwerkzeug

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010003273U1 (de) 2010-03-05 2010-06-02 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentwerkzeug

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2445866Y (zh) * 2000-09-20 2001-09-05 陕西汉中品鼎扭矩工具制造有限责任公司 扭矩扳手的扭矩预置机构
DE20311811U1 (de) * 2003-07-31 2003-09-25 Hazet Werk Zerver Hermann Drehmomentschlüssel
DE202006003274U1 (de) * 2006-02-28 2006-04-27 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentschlüssel
DE202009005743U1 (de) * 2009-04-20 2009-06-25 Shyu, Jun-Tsai Drehgriffanordnung für einen drehmoment-verstellbaren Schraubenschlüssel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010003273U1 (de) 2010-03-05 2010-06-02 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentwerkzeug

Also Published As

Publication number Publication date
DE202011050282U1 (de) 2011-07-11
CN102962802A (zh) 2013-03-13
EP2529890B1 (fr) 2016-07-06
ES2585837T3 (es) 2016-10-10
EP2529890A3 (fr) 2014-12-31
CN102962802B (zh) 2015-08-19

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