EP1631418B1 - Tournevis a limitation du couple de rotation - Google Patents

Tournevis a limitation du couple de rotation Download PDF

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Publication number
EP1631418B1
EP1631418B1 EP04733337A EP04733337A EP1631418B1 EP 1631418 B1 EP1631418 B1 EP 1631418B1 EP 04733337 A EP04733337 A EP 04733337A EP 04733337 A EP04733337 A EP 04733337A EP 1631418 B1 EP1631418 B1 EP 1631418B1
Authority
EP
European Patent Office
Prior art keywords
blade
handle
toothed
fixed
compression spring
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
EP04733337A
Other languages
German (de)
English (en)
Other versions
EP1631418A1 (fr
Inventor
Michael Abel
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.)
Wera Werk Hermann Werner GmbH and Co KG
Original Assignee
Wera Werk Hermann Werner 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
Priority claimed from DE102004016521A external-priority patent/DE102004016521A1/de
Application filed by Wera Werk Hermann Werner GmbH and Co KG filed Critical Wera Werk Hermann Werner GmbH and Co KG
Publication of EP1631418A1 publication Critical patent/EP1631418A1/fr
Application granted granted Critical
Publication of EP1631418B1 publication Critical patent/EP1631418B1/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
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/141—Mechanical overload release couplings
    • 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 screwdriver according to the preambles of claims 1 and 7 with a handle and a blade, the handle having a blade adjoining the blade front handle portion and a blade facing away from the blade forming the rear handle portion, wherein the rear handle portion of a cavity for at least partially receiving a cooperating with the blade torque limiting device and extending to the handle in the axial direction of the handle substantially immovable blade passes through a through hole of the front handle part, wherein the torque limiting device axially and rotationally connected to the blade first tooth part forms and a rotationally fixed and against the Restoring force of a compression spring axially displaceable associated with the handle second tooth part, wherein the tooth parts form the blade surrounding serrations whose teeth form oblique edges of the compression spring against each other gedr be ckt and slide on each other when reaching a limit torque.
  • a generic screwdriver is previously known from US 4,063,474. Within the cavity of the rear handle portion is a torque limiting arrangement. The triggering torque is adjustable there. A consisting of several handle parts screwdriver handle is also previously known from EP 1 092 510 A. Also US 5,746,298 A; US Pat. No. 2,396,040 and US Pat. No. 2,797,564 describe screwdrivers having a plurality of gripping parts, which in particular are screwed together and which form a cavity in which a torque limiting arrangement lies.
  • the invention has for its object to enable a quick assembly and disassembly of the tool.
  • the claim 1 provides a rotationally fixed and axially fixed to the blade bearing collar, which is mounted between bearing portions of the two handle parts and is formed by the blade-fixed tooth part.
  • the bearing collar preferably rests on an area associated with the opening of the cavity. This allows the rear end of the blade to protrude freely into the cavity.
  • the blade-proof tooth part and the counter-toothing of the grifffesten tooth part form saw teeth, which mesh. In this way, in the screwing-in direction of a screw, the torque limitation can come into effect by the tooth flanks sliding off one another when a limit torque is reached and sliding over one another when a triggering torque is reached.
  • the helical compression spring is supported on spacers. By selecting the thickness or the number of spacers, the limit torque can be adjusted.
  • the end portion of the blade may penetrate a portion of the helical compression spring.
  • the blade-proof tooth part is supported on an abutment surrounding the blade as a collar. The front handle part, the Forms this covenant, can form a throat of the handle or even a cap for the opening of the handle cavity.
  • the counter-tooth part which is axially displaceable within the handle against the restoring force of the compression spring, has on its outer circumferential wall in the direction of displacement extending ribs. These ribs protrude into rib gaps of corresponding ribs associated with the cavity wall of the cavity.
  • the entire torque limiting device is fixedly assigned to the blade. It can be inserted as a preassembled part through the opening of the rear handle part, there to detoxine axially forces. The assembly is possible without the application of axial forces.
  • the compression spring can not only rest on the bottom of the cavity.
  • the compression spring is supported on the bearing collar.
  • the blade-proof tooth part can be located in the region of the free end of the blade.
  • the entire torque limiting device is also assigned to the blade est. After loosening the front handle part, the blade can be taken out of the cavity together with the two tooth parts and the prestressed compression spring. This facilitates maintenance and assembly.
  • the blade axially and rotationally fixed tooth part is supported on a washer, which is fixed by means of a screwed onto the free end of the blade nut. With this nut can then adjust the release torque.
  • the counter-tooth part preferably forms a cavity. This cavity is formed as an annular cavity and can accommodate a portion of the compression spring. The compression spring then rests on the bottom of the ring cavity.
  • the preferred shape of the handle is in addition to the elongated handle and the angle handle.
  • the two handle parts are locked together in the screwed state such that they are again unscrewed after destruction of one of the parting planes associated latching member.
  • the fferribndung between the two reef parts can be solved at any time, for example, to change the release torque by replacing the spring or other components, this is erfindugnshunt no longer possible.
  • the unscrewing of the two handle parts is connected to the destruction of a locking member, manipulation of Grenzcardmoemtn are immediately recognizable.
  • the locking member is designed so that its break is easily visible externally.
  • each of the two handle parts in the region of the parting plane forms a step.
  • This level forms in the screwed state an annular groove.
  • the ring covers the dividing plane between the two handle parts.
  • Each of the two stages forms at least one recess.
  • the recesses lie side by side in such a way that they complement each other to form a pocket.
  • the locking member of the ring In this bag is in the screwed state, the locking member of the ring.
  • This locking member forms a projection with two sections. One section is located in one of the two recesses, so that the recesses can not be rotated apart without the projection is destroyed.
  • a portion of the projection rests firmly in one of the two recesses and the other portion forms a spring tongue, which can escape from its associated recess in Verschschraubraum and forms a turnstile in the other screwing.
  • the ring can be placed during assembly to the level of a handle part, so that a portion rests firmly in the associated recess.
  • the handle is made of plastic.
  • the ring can also be made of plastic. It may be a plastic injection molded part, to which the latching element is integrally formed in the same material.
  • the screwdriver consists of a handle 1 and a blade 2.
  • the handle 1 consists of two plastic parts 3, 4. It is a front handle part 3, the end face of the blade 2 springs, and a rear handle part 4, which is a dome. 5 forms, which lies on the side facing away from the blade of the handle 1.
  • the blade 2 is rotatable relative to the handle 1 when a tripping torque is exceeded.
  • the handle has in an inner cavity 9 but a locking mechanism which forms a torque limiting arrangement, with which by turning the handle 1 on the blade 2, a torque can be applied.
  • the blade turns in the handle. In the opposite direction significantly higher torques can be transmitted.
  • the front handle part 3 forms an internal thread 6.
  • an external thread 7 of a threaded flange of the rear handle 4 can be screwed.
  • the front grip part 3 comes into contact with the rear grip part 4, forming a parting plane 8.
  • Each of the two grip parts 3, 4 forms a step 11 ', 11 "in the region of the parting plane 8.
  • the two steps 11 form ', 11 "an annular groove 11.
  • the dividing plane extends 8.
  • This plastic ring 12 has at two diametrically opposite points radially inwardly projecting locking members 10.
  • Each of the two locking members 10 forms a first projection 10 'and a second projection 10 ".
  • the second portion 10 " which rests in the recess 13", designed as a spring tongue.
  • the rear grip part 4 can shift there to the left relative to the front grip part 3. If the spring tongue 10 "acted upon by the boundary of the recess 13", it can dip into the other recess 13 '. A displacement of the rear handle part 4 relative to the front handle part 3 in the opposite direction, ie to the right, is not possible because the spring tongue 10 "is blocking the corresponding wall of the recess 13".
  • This plastic part forms a toothed part 14.
  • the tooth part 14 has a toothing 14 'with sawtooth-shaped teeth.
  • the tooth part 14 is rotatably connected to the blade 2.
  • the cavity 9 of the rear handle portion 4 has not shown, extending in the axial direction grooves or ribs. In the grooves of the wall of the cavity 9 engage ribs of a counter-tooth part 15, not shown.
  • the counter-tooth part 15 has a toothing 15 ', which corresponds to the toothing 14'.
  • On the rear end face of the counter-tooth part 15 are spacers 17.
  • On the spacers 17, a helical compression spring 16 is supported, which is supported with its other end on the bottom of the cavity 9.
  • An end portion of the plastic-coated blade protrudes into the cavity of the helical compression spring 16 a. This end portion of the blade 2 extends through the sleeve-shaped counter-tooth part 15th
  • the rear handle part 4 forms a bearing wall 19, against which an annular collar 18 of the toothed part 14 is supported. With a bearing projection 20, the tooth part 14 is supported on an abutment 21 of the front grip part 3, so that it rests axially fixed in the handle 1. The tooth part 14 receives the blade 2. The blade 2 is stuck with its end in the up to the hollow of the compression spring 16 extending plastic part 14th
  • the release torque can be adjusted.
  • the blade 2 passes through with play an axial cavity of the front handle part. 3
  • the Storage takes place with a rotatably and axially fixed to the blade associated bearing disc.
  • the one end 20 of the bearing plate 18 is supported on an abutment 21 of the front handle part 3 and the other end of the bearing plate 18 is supported on a portion of the rear handle part 4 from. If the two handle parts 3, 4 separated from each other, so the blade can be removed together with the torque limiting arrangement of the cavity 9.
  • the entire torque limiting arrangement is fixedly associated with the blade.
  • the blade 2 consists of a hexagonal steel with a gradation 30. On this gradation 30, a circular metal disc 18 is supported. This metal disc 18 forms a bearing disc.
  • the tapered portion of the blade 2 receiving in itself is based on the rear wide side surface of the bearing plate 18 from a strong helical compression spring with a rectangular winding profile. The clamping force of this helical compression spring 16 defines the limit torque at which the teeth 28 to be explained below a toothing 15 and a counter toothing 15 are disengaged.
  • the end facing away from the bearing plate 18 end of the helical compression spring 16 is inserted into an annular cavity 29 which is associated with a counter-tooth part 15.
  • the counter-tooth part 15 is made of plastic and has ribs 23 on its outer wall.
  • the counter tooth part 15 forms saw teeth 27. These saw teeth 27 are located on the bottom of the annular groove on which the compression spring 16 is supported, opposite side. The teeth 28 engage in gaps of saw teeth 27 of a toothed part 14.
  • the tooth part is also made of plastic. But it is rotatably associated with the blade 2. The force of the prestressed compression spring 16 presses the toothed part 14 against a threaded portion 24 the washer 2 associated washer 26. The washer 26 is held by a nut 25 which is screwed onto the threaded portion 24.
  • the above-mentioned ribs 23 of the counter-tooth part 15 engage in grooves located between ribs 22, wherein the ribs 22 are formed by the wall of the cavity 9. Accordingly, the counter-tooth part 15 can move in the axial direction against the clamping force of the compression spring 16 within the cavity 9, but it is rotatably associated with the rear handle part 4. Thus, a torque can be transmitted from the grip part to the blade via the teeth 27, 28.
  • the front handle part 3 forms a closure cap. This cap is clipped into a diameter-extended portion of the cavity 9. An inner collar of the front grip part 3 forms an abutment 21, on which the bearing plate 18 can be supported.
  • the preassembled in the figure 11 part is then inserted into the opening 9 of the rear handle part 4, where it rests force-free.
  • the outer edge of the bearing plate 18 is supported on the end faces of the ribs 22. These form the bearing wall 19.
  • the torque limiting device together with blade 2 is held by means of the cap 3 within the cavity, wherein the peripheral edge of the collar forms the counter bearing 21, which rests against the forward facing broad side of the bearing plate 18.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Claims (15)

  1. Tournevis avec une poignée (1) et une lame (2), la poignée (1) comportant une partie de poignée avant (3) raccordée à la lame (2) et une partie de poignée arrière (4), la partie de poignée arrière (4) comportant une cavité (9) pour recevoir au moins partiellement un dispositif de limitation de couple de rotation coopérant avec la lame (2) et la lame (2) sensiblement fixe par rapport à la poignée (1) dans l'axe de la poignée (1) dépassant d'un alésage de passage de la partie de poignée avant (3), le dispositif de limitation de couple de rotation formant une première partie dentée (14) reliée à la lame de manière fixe en rotation et fixe dans le sens axial et comportant une seconde partie dentée (15) associée à la poignée (3), fixe en rotation et mobile dans le sens axial contre la force de rappel d'un ressort de pression (16), les parties dentées (14, 15) formant des dentures frontales entourant la lame (2) dont les dents forment des flancs obliques qui sont pressés les uns contre les autres par le ressort de pression (16) et qui glissent les uns sur les autres lorsqu'un couple de rotation limite est atteint, caractérisé par une collerette d'appui (18) associée à la lame (2) de manière fixe en rotation et fixe dans le sens axial qui est logée entre des segments d'appui (19, 20) des deux parties de poignée (3) et qui est formée par la partie dentée fixée à la lame (14).
  2. Tournevis selon la revendication 1, caractérisé en ce que la denture (14') de la partie dentée fixée à la lame (14) et la denture antagoniste (15') de la partie dentée fixée à la poignée (15) forment des dents de scie venant en prise les unes dans les autres.
  3. Tournevis selon l'une quelconque des revendications précédentes, caractérisé en ce que le couple de rotation limite est défini par des rondelles d'écartement (17) contre lesquelles s'appuie le ressort cylindrique de pression (16).
  4. Tournevis selon l'une quelconque des revendications précédentes, caractérisé par un segment d'extrémité de la lame (2) traversant la partie dentée antagoniste (15) et une partie du ressort cylindrique de pression (16).
  5. Tournevis selon l'une quelconque des revendications précédentes, caractérisé en ce que la partie dentée fixée à la lame (14) s'appuie sur une butée (21) entourant la lame sous forme de collet.
  6. Tournevis selon l'une quelconque des revendications précédentes, caractérisé en ce que le ressort de pression (16) s'appuie sur le fond de la cavité (9).
  7. Tournevis avec une poignée (1) et une lame (2), la poignée (1) comportant une partie de poignée avant (3) raccordée à la lame (2) et une partie de poignée arrière (4), la partie de poignée arrière (4) comportant une cavité (9) pour recevoir au moins partiellement un dispositif de limitation de couple de rotation coopérant avec la lame (2) et la lame (2) sensiblement fixe par rapport à la poignée (1) dans l'axe de la poignée (1) dépassant d'un alésage de passage de la partie de poignée avant (3), le dispositif de limitation de couple de rotation formant une première partie dentée (14) reliée à la lame de manière fixe en rotation et fixe dans le sens axial et comportant une seconde partie dentée (15) associée à la poignée (3), fixe en rotation et mobile dans le sens axial contre la force de rappel d'un ressort de pression (16), les parties dentées (14, 15) formant des dentures frontales entourant la lame (2) dont les dents forment des flancs obliques qui sont pressés les uns contre les autres par le ressort de pression (16) et qui glissent les uns sur les autres lorsqu'un couple de rotation limite est atteint, caractérisé par une collerette d'appui (18) associée à la lame (2) de manière fixe dans le sens axial qui est logée entre des segments d'appui (19, 20) des deux parties de poignée (3) et qui, conjointement avec le ressort de pression (16) et les deux parties dentées (14, 15), forme un dispositif de limitation de couple de rotation relié fixement à la lame (2) qui est logé avec des forces nulles dans la partie de poignée arrière (4).
  8. Tournevis selon la revendication 7, caractérisé en ce que la collerette d'appui (18) est formée par une rondelle faite, en particulier, en métal.
  9. Tournevis selon l'une quelconque des revendications 7 ou 8, caractérisé en ce que le ressort de pression (16) s'appuie sur la collerette d'appui (18).
  10. Tournevis selon l'une quelconque des revendications 7 à 9, caractérisé en ce que le dispositif de limitation de couple de rotation associé fixement à la lame (2) est fixé par un écrou (25) vissé sur un filetage (24) formé par l'extrémité de la lame (2), écrou (25) à l'aide duquel le couple de dégagement peut, de préférence, être également réglé.
  11. Tournevis selon l'une quelconque des revendications 7 à 10, caractérisé en ce que la seconde partie dentée (15) portant la denture antagoniste (15') forme une cavité annulaire dans laquelle fait saillie une portion du ressort de pression (16) qui s'appuie sur le fond de la cavité annulaire (9).
  12. Tournevis selon l'une quelconque des revendications précédentes, caractérisé en ce que la poignée est une poignée coudée.
  13. Tournevis selon l'une quelconque des revendications précédentes, caractérisé en ce que la partie de poignée avant (3) est un capuchon formant un collet de butée (21).
  14. Tournevis selon l'une quelconque des revendications précédentes, caractérisé par des nervures extérieures (23) s'étendant dans l'axe de la seconde partie dentée (15) entourant la lame en forme d'anneau qui coopèrent avec des nervures correspondantes (22) de la paroi de la cavité (9).
  15. Tournevis selon l'une quelconque des revendications précédentes, caractérisé en ce que le bord de la rondelle formant la collerette d'appui (18) repose sur des nervures (22) associées aux extrémités frontales de la paroi de la cavité (9).
EP04733337A 2003-05-17 2004-05-17 Tournevis a limitation du couple de rotation Expired - Lifetime EP1631418B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20320337 2003-05-17
DE102004016521A DE102004016521A1 (de) 2003-05-17 2004-04-03 Schraubendreher mit Drehmomentbegrenzung
PCT/EP2004/005283 WO2004101227A1 (fr) 2003-05-17 2004-05-17 Tournevis a limitation du couple de rotation

Publications (2)

Publication Number Publication Date
EP1631418A1 EP1631418A1 (fr) 2006-03-08
EP1631418B1 true EP1631418B1 (fr) 2006-12-27

Family

ID=33454220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04733337A Expired - Lifetime EP1631418B1 (fr) 2003-05-17 2004-05-17 Tournevis a limitation du couple de rotation

Country Status (4)

Country Link
EP (1) EP1631418B1 (fr)
AT (1) ATE349299T1 (fr)
DE (1) DE502004002463D1 (fr)
WO (1) WO2004101227A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019116238A1 (de) 2018-06-15 2019-12-19 Wera Werkzeuge Gmbh Drehmomentbegrenzungseinrichtung und Verfahren zu dessen Kalibrierung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011017061B4 (de) * 2011-04-14 2015-12-31 Wiha Werkzeuge Gmbh Schraubendreher mit Drehmomentbegrenzung
EP3703908B1 (fr) * 2019-01-25 2024-03-06 Gauthier Biomedical, Inc. Mécanisme de fixation d'arbre amélioré pour un outil
TWI783835B (zh) * 2021-12-22 2022-11-11 歐玉華 定扭力工具

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Publication number Priority date Publication date Assignee Title
US2733622A (en) * 1956-02-07 evans
US2797564A (en) * 1954-08-11 1957-07-02 Joseph C Bonneau Adjustable torque tool
GB856136A (en) * 1956-03-26 1960-12-14 M H H Engineering Company Ltd Torque limiting wrenches
GB913388A (en) * 1960-10-13 1962-12-19 Gen Electric Co Ltd Improvements in or relating to screwdrivers and like tools
FR1569991A (fr) * 1968-04-23 1969-06-06
US4448098A (en) * 1982-03-10 1984-05-15 Katsuyuki Totsu Electrically driven screw-driver
US5746298A (en) * 1996-07-19 1998-05-05 Snap-On Technologies, Inc. Adjustable torque-limiting mini screwdriver
DE19942292C2 (de) * 1999-09-04 2001-09-27 Daimler Chrysler Ag Zwischenglied für eine Handschrauberwelle
SE9903639L (sv) * 1999-10-11 2000-09-18 Kapman Ab Momentbegränsad skruvmejsel
EP1110512A1 (fr) * 1999-12-20 2001-06-27 Sulzer Orthopedics Ltd. Porte-outil médical avec limitation de couple
DE10011506A1 (de) * 2000-03-09 2001-09-13 Wuerth Adolf Gmbh & Co Kg Werkzeug zum Übertragen eines Drehmomentes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019116238A1 (de) 2018-06-15 2019-12-19 Wera Werkzeuge Gmbh Drehmomentbegrenzungseinrichtung und Verfahren zu dessen Kalibrierung

Also Published As

Publication number Publication date
EP1631418A1 (fr) 2006-03-08
ATE349299T1 (de) 2007-01-15
WO2004101227A1 (fr) 2004-11-25
DE502004002463D1 (de) 2007-02-08

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