EP3793775B1 - Schraubwerkzeug zur übertragung zweier fest eingestellter drehmomente - Google Patents

Schraubwerkzeug zur übertragung zweier fest eingestellter drehmomente Download PDF

Info

Publication number: EP3793775B1
Authority: EP; European Patent Office
Prior art keywords: torque; limiting; screwing tool; torque limiting; tool according
Prior art date: 2018-05-18
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.): Active

Application number

EP19725050.9A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP3793775A1 (de

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 Werkzeuge GmbH

Original Assignee

Wera Werkzeuge GmbH

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.)

2018-05-18

Filing date

2019-05-09

Publication date

2024-06-12

2019-05-09 Application filed by Wera Werkzeuge GmbH filed Critical Wera Werkzeuge GmbH

2021-03-24 Publication of EP3793775A1 publication Critical patent/EP3793775A1/de

2024-06-12 Application granted granted Critical

2024-06-12 Publication of EP3793775B1 publication Critical patent/EP3793775B1/de

Status Active legal-status Critical Current

2039-05-09 Anticipated expiration legal-status Critical

Images

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
- 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
- B25B13/00—Spanners; Wrenches
- B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
- B25B13/461—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
- B25B13/466—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in an axial direction
- 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
- B25B15/00—Screwdrivers
- B25B15/02—Screwdrivers operated by rotating the handle
- 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
- B25B23/0007—Connections or joints between tool parts
- B25B23/0042—Connection means between screwdriver handle and screwdriver shaft

Definitions

the invention relates to a screwing tool according to the preamble of claim 1 for transmitting a torque with a spring element which acts on a first torque limiting arrangement and a second torque limiting arrangement.
the DE 103 41 697 B3 discloses a screwing tool with two torque limiting arrangements which are arranged in a housing and which are acted upon by a common compression spring.
the two torque limiting arrangements increase the stroke of the compression spring which is required to overcome the limit torque.
the US$5,538,089 describes a coupling with three coupling elements, each of which has interlocking coupling cams that can slide against each other on inclined surfaces.
a shaft is located in a hollow of a handle, which has a support member at its rear end, on which a spring element is supported, which applies force to a first torque limiting element, which is rotationally fixed but axially displaceable is arranged in the housing.
the first torque limiting element has inclined flanks that rest against the counter-inclined flanks of a second torque limiting element, which is arranged axially fixed to the housing but can rotate relative to the housing.
This second torque limiting element is connected to a torque output tool.
the force of the spring and the pitch angle of the inclined flanks define the breakaway torque of the torque limiting arrangement.
the invention is based on the object of further developing a generic screwing tool in a manner that is advantageous in use and in particular in such a way that it can be implemented as a micro-tool.
the spring element is to be supported on a support member which is formed by a second torque limiting arrangement.
a single spring element thus acts on two different torque limiting arrangements with the same spring force, each torque limiting arrangement preferably having two torque limiting elements.
the spring which is preferably formed by a spiral compression spring, but can also be a leaf spring, a conical spring, a disc spring or a plastic body, thus acts on two pairs of torque limiting elements, which are preferably arranged in a slanted flank arrangement relative to one another.
Each torque limiting arrangement can thus have a first torque limiting element which has slanted flanks which abut against slanted flanks which are assigned to a second torque limiting element.
the two torque limiting arrangements can have slanted flanks with different pitch angles. Since the pitch angle defines the level of the breakaway torque, i.e. the limit torque, the torque limiting device according to the invention can deliver two torques, in particular fixed ones.
the torque limiting elements are designed as sleeves. These sleeves can be arranged on an axis.
the pairs of torque limiting elements each have an axially movable torque limiting element which is connected to the housing in a rotationally fixed manner. The two ends of the spring element pointing away from one another preferably engage these axially movable torque limiting elements.
the two axially movable torque limiting elements interact with two axially fixed but rotatable torque limiting elements, which can be connected to a blade or each have a blade holder for inserting a blade.
the two blades are preferably located on a common axis, so that two blade holders can have openings pointing in opposite directions, into which a blade can be inserted.
the tool can be designed as a miniature tool.
the housing is made of a flat body. It can consist in particular of two housing shells connected to one another, whereby the housing shells can be clipped, glued or welded together.
the inclined flanks are preferably formed by a saw tooth system, whereby each tooth forms an inclined flank and a steep flank with which high torques can be applied, for example to loosen a screw.
Both Torque limiting arrangements preferably act in the same direction, for example clockwise.
the screwing tool shown in the drawings is a flat tool for transmitting two different torques.
the screwing tool has a flat housing, which is formed by housing shells 1, 2.
the outer surface of the housing forms torque transmission surfaces to which a torque can be applied using the fingers of a user's hand.
the torque is applied to one of two blades 16, 17 lying on a common axis A, with one blade 16, 17 each inserted into a blade holder 3, 4 of the housing.
the two blade holders 3, 4 point in opposite directions.
the torque limiting device in the form of a double helical flank gear.
the torque limiting device has two torque limiting arrangements that are arranged in mirror image.
Each torque limiting arrangement has two torque limiting elements 5, 6 or 7, 8 that are arranged in a helical flank arrangement.
the helical flanks 12, 13 or 14, 15 of the two helical flank arrangements have teeth with tooth flanks that have different pitch angles from one another.
the tooth flanks are the flanks of saw teeth.
the two blade holders 3, 4 are each assigned to a torque limiting element 5, 6, which can be rotated relative to the housing 1, 2.
the two torque limiting elements 5, 6 are axially fixed to the housing.
These torque limiting elements 5, 6 have inclined flanks 13, 14.
the inclined flanks 14, 15 have a greater pitch than the inclined flanks 12, 13, so that a greater torque can be transmitted to the blade 17, which is assigned to the torque limiting element 6 with the inclined flanks 14 of greater pitch, than to the torque limiting element 5, whose inclined flanks 13 have a smaller pitch.
the inclined flanks 13, 14 and 15, 16 are formed by sawtooth-like projections which interlock and can each transmit a greater torque in the anti-clockwise direction than in the clockwise direction.
These torque limiting elements 7, 8 are arranged so as to be displaceable relative to the housing 1, 2 in the direction of extension of the two blades 16, 17.
Ribs 18 are provided which project radially inwards from a housing cavity and which engage in tooth recesses of the axially movable torque limiting elements 7, 8 in order to bind them to the housing 1, 2 in a rotationally fixed manner.
a pre-stressed spiral compression spring 9 is provided, which is supported on support surfaces of the axially movable torque limiting elements 7, 8.
a first end 10 of the spiral compression spring 9 is supported on the bottom of a pot-shaped recess in the torque limiting element 7.
An end 11 opposite this end 10 the helical compression spring 9 rests on the bottom of a cup-shaped recess of the torque limiting element 8.
the four torque limiting elements 5, 6, 7, 8 are arranged one behind the other in the axial direction.
An axle body 19 can extend between the blade holders 3, 4, which passes centrally through the spiral compression spring 9 and the two axially movable torque limiting elements 7, 8 designed as sleeves.
the two-part axle element 19, 19' extends from one blade holder 3 to the opposite blade holder 4.
the two axle bodies 19, 19' have enlarged diameter heads that form the bottom of the blade holders 3, 4.
this two-part axle element 19, 19' is not present.
the tool forms more than two blade holders 3, 4 and more than one spring element 9.
two axes each of which is assigned two screwing tools 16, 17, cross each other.
a spring element formed, for example, by a leaf spring element or an elastic body can be a common spring element that acts not only on two torque limiting arrangements, but more, for example four torque limiting arrangements.
a spring is supported with its two ends on a torque limiting arrangement with one or more plungers interposed.
such a plunger has an elongated hole through which another plunger protrudes transversely. Both plungers can move relative to each other.
This plunger can also be acted upon by one end of a compression spring.
the plunger and the other end of the compression spring then each act on a torque limiting arrangement.
four torque limiting arrangements are provided, which have four different limit torques, but which are only acted on by two compression springs in total.
the different limit torques are specified via the slope of the inclined flanks.
Another variant can provide for two screwing tools, as shown in the drawings, to be connected to one another. In particular, they are connected to one another so that they can rotate. Two such screwing tools can be connected to one another to form an axis of rotation extending transversely to the broad sides.
the housings can be designed as slim tubes to save space, which can be pivoted about an axis of rotation from a parallel position to an intersecting position, so that the tool has a cross-spanner-like appearance when pivoted.
Such an appearance can also be achieved with a tappet arrangement in which a small-diameter tappet extends through an elongated hole of a large-diameter tappet and each tappet is acted upon by a spring element so that the tappets can be displaced relative to each other in a direction transverse to the other tappet.
a screwing tool characterized in that the spring element 9 acts on a second torque limiting arrangement 6, 8.
a screwing tool which is characterized in that the first and/or second torque limiting arrangement has two torque limiting elements 5, 6; 7, 8 arranged relative to one another in an inclined flank system 12, 13; 14, 15.
a screwing tool which is characterized in that first inclined flanks 12, 13 of the first torque limiting arrangement 5, 7 have a different pitch angle than second inclined flanks 14, 15 of the second torque limiting arrangement 6, 8.
a screwing tool characterized in that each of the two torque limiting arrangements 5, 7; 6, 8 each has a pair of torque limiting elements 5, 6; 7, 8.
a screwing tool which is characterized in that the torque limiting elements 5, 6; 7, 8 have a sleeve shape, wherein the end faces of the sleeves have the teeth 12, 13; 14, 15.
a screwing tool characterized by diametrically opposed blade receptacles 3, 4 or blades 16, 17.
a screwing tool which is characterized in that the torque limiting device having at least two torque limiting arrangements 5, 6; 7, 8 is arranged in a flat housing, wherein the housing consists in particular of two housing shells 1, 2.
a screwing tool which is characterized in that the spring element 9 which applies force to at least two torque limiting arrangements 5, 7; 6, 8 is a helical compression spring.
a screwing tool which is characterized in that at least a first end 10 of the spring element 9 and at least one further, in particular second end 11 of the same spring element 9 are each supported on an axially movable torque limiting element 7, 8, which is connected in a rotationally fixed manner to the housing, which is in a torque-transmitting operative connection with a second torque limiting element 5, 6, which is rotatable relative to the housing 1, 2.

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Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Arrangements For Transmission Of Measured Signals (AREA)

EP19725050.9A 2018-05-18 2019-05-09 Schraubwerkzeug zur übertragung zweier fest eingestellter drehmomente Active EP3793775B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE102018112068.0A DE102018112068A1 (de)	2018-05-18	2018-05-18	Schraubwerkzeug zur Übertragung zwei fest eingestellter Drehmomente
PCT/EP2019/061951 WO2019219505A1 (de)	2018-05-18	2019-05-09	Schraubwerkzeug zur übertragung zweier fest eingestellter drehmomente

Publications (2)

Publication Number	Publication Date
EP3793775A1 EP3793775A1 (de)	2021-03-24
EP3793775B1 true EP3793775B1 (de)	2024-06-12

Family

ID=66597535

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP19725050.9A Active EP3793775B1 (de)	2018-05-18	2019-05-09	Schraubwerkzeug zur übertragung zweier fest eingestellter drehmomente

Country Status (7)

Country	Link
US (1)	US11926022B2 (zh)
EP (1)	EP3793775B1 (zh)
JP (1)	JP2021523022A (zh)
CN (1)	CN112166010B (zh)
DE (1)	DE102018112068A1 (zh)
TW (1)	TWI812711B (zh)
WO (1)	WO2019219505A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US11446798B2 (en) *	2020-11-12	2022-09-20	Yu-Ching Lin	Torque tool
DE202022100447U1 (de) *	2022-01-26	2023-04-27	Hazet-Werk Hermann Zerver Gmbh & Co. Kg	Drehmoment-Schraubendreher
DE102022114689A1 (de)	2022-06-10	2023-12-21	Wera Werkzeuge Gmbh	Schraubwerkzeug mit Drehmomentbegrenzungseinrichtung

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2018
- 2018-05-18 DE DE102018112068.0A patent/DE102018112068A1/de active Pending
2019
- 2019-05-09 JP JP2020561703A patent/JP2021523022A/ja active Pending
- 2019-05-09 US US17/051,500 patent/US11926022B2/en active Active
- 2019-05-09 EP EP19725050.9A patent/EP3793775B1/de active Active
- 2019-05-09 CN CN201980032819.7A patent/CN112166010B/zh active Active
- 2019-05-09 WO PCT/EP2019/061951 patent/WO2019219505A1/de active Application Filing
- 2019-05-10 TW TW108116263A patent/TWI812711B/zh active

Also Published As

Publication number	Publication date
EP3793775A1 (de)	2021-03-24
JP2021523022A (ja)	2021-09-02
TWI812711B (zh)	2023-08-21
US11926022B2 (en)	2024-03-12
CN112166010B (zh)	2024-02-13
US20210308843A1 (en)	2021-10-07
DE102018112068A1 (de)	2019-11-21
TW202003167A (zh)	2020-01-16
CN112166010A (zh)	2021-01-01
WO2019219505A1 (de)	2019-11-21

Publication	Publication Date	Title
DE60301050T2 (de)	2006-05-24	Elektrisch betriebener vibrationsbohrer/-antrieb
DE10065398C2 (de)	2002-11-14	Längenverstellbarer Platzhalter zum Einsetzen zwischen zwei Wirbelkörper
EP2334952B1 (de)	2013-10-23	Spindeltrieb mit verdrehsicherung
DE19804765C2 (de)	2000-09-28	Platzhalter mit einstellbarer axialer Länge
DE69400262T2 (de)	1997-01-02	Motorgetriebenes Gerät und Mechanismus dafür
EP3793775B1 (de)	2024-06-12	Schraubwerkzeug zur übertragung zweier fest eingestellter drehmomente
EP1552097B1 (de)	2012-12-12	Getriebevorrichtung, insbesondere für verstelleinrichtungen in kraftfahrzeugen
DE10202263A1 (de)	2002-09-26	360 DEG Kupplungskragen
DE10202262A1 (de)	2002-09-26	Mehrstufiges Getriebe für Motorwerkzeug
EP2594367B1 (de)	2014-01-22	Schraubwerkzeug mit einer Vorrichtung zur Begrenzung des übertragenen Drehmomentes
DE202013101235U1 (de)	2013-05-06	Drehmomentschlüssel
DE102004058807A1 (de)	2006-06-08	Handwerkzeugmaschine mit einer Drehmomentbegrenzungseinheit
DE202016107404U1 (de)	2017-01-16	Rücksteller für den Kolben des Radbremszylinders
DE202015100727U1 (de)	2015-02-25	Drehmomentschraubendreher
EP2078591B1 (de)	2013-10-16	Presswerkzeug
DE19527193A1 (de)	1997-01-30	Schraubgerät
DE3645139C2 (zh)	1991-01-17
DE20008603U1 (de)	2000-08-24	Schraubendreher-Schraubenschlüssel-Kombinationshandwerkzeug
DE10161356A1 (de)	2003-06-26	Schraubgerät
DE102006056004B4 (de)	2018-04-26	Gelenkbeschlag für Kraftfahrzeugsitze mit mindestens zwei Sperrarmen
DE3335196C1 (de)	1984-11-22	Spannvorrichtung für verzahnte Werkstücke
DE102011051837A1 (de)	2013-01-17	Antriebsvorrichtung zum Antreiben eines Drehbeschlags
EP2155437B1 (de)	2012-05-02	Drehmomentübertragungsvorrichtung mit umschaltbarer rastkugel
EP3210724A2 (de)	2017-08-30	Werkzeug mit griffweitenverstellung
DE102022114689A1 (de)	2023-12-21	Schraubwerkzeug mit Drehmomentbegrenzungseinrichtung

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