EP4132750B1 - Befestigungsmechanismus - Google Patents

Befestigungsmechanismus Download PDF

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Publication number
EP4132750B1
EP4132750B1 EP21717176.8A EP21717176A EP4132750B1 EP 4132750 B1 EP4132750 B1 EP 4132750B1 EP 21717176 A EP21717176 A EP 21717176A EP 4132750 B1 EP4132750 B1 EP 4132750B1
Authority
EP
European Patent Office
Prior art keywords
fastening mechanism
male component
component
locking member
cutaway
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.)
Active
Application number
EP21717176.8A
Other languages
English (en)
French (fr)
Other versions
EP4132750A1 (de
Inventor
Stephen Lawson
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.)
Norbar Torque Tools Ltd
Original Assignee
Norbar Torque Tools Ltd
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 Norbar Torque Tools Ltd filed Critical Norbar Torque Tools Ltd
Publication of EP4132750A1 publication Critical patent/EP4132750A1/de
Application granted granted Critical
Publication of EP4132750B1 publication Critical patent/EP4132750B1/de
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
    • B25B23/0007—Connections or joints between tool parts
    • 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
    • B25B23/16—Handles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G3/00—Attaching handles to the implements
    • B25G3/02—Socket, tang, or like fixings
    • B25G3/12—Locking and securing devices
    • B25G3/16—Locking and securing devices comprising bayonet joints

Definitions

  • the present invention relates to a fastening mechanism between a male and a female component, particularly, although not exclusively, the handle and head of a torque wrench.
  • Torque wrenches are fundamental tools used in many industries, particularly the manufacturing and maintenance industries, to apply a predetermined amount of torque to a fastener (e.g. a nut, screw or bolt).
  • a fastener e.g. a nut, screw or bolt.
  • the current method of fastening a detachable end fitting to the handle of a torque wrench involves the use of a plunger-and-hole arrangement.
  • This arrangement comprises a male component and a female component, which may be a spigot on the handle and an opening on the end fitting of the tool respectively (or vice versa).
  • the male and female components respectively further comprise a radial plunger and a corresponding hole.
  • the components are fastened together by the engagement of the spring-biased plunger within the hole when the spigot is inserted into the female component.
  • a protruding push button formed by the distal end of the plunger, must be pressed to disengage the plunger from the hole, thereby allowing the male component to be withdrawn from the female component.
  • the Applicant has identified that the conventional fastening mechanism is incompatible with tools that must be used in proximity to live electrical components. It is a requirement of the relevant standards that such tools are covered in an insulating material to protect the user. Therefore, the current fastening mechanism used in the art (i.e. the plunger-and-hole mechanism) is inadequate for such applications, as the insulating layer would have to be removed in order to depress the plunger, thereby substantially increasing the level of inconvenience and risk to the user.
  • the current fastening mechanism used in the art i.e. the plunger-and-hole mechanism
  • the present invention seeks to provide a fastening mechanism that overcomes these shortcomings.
  • US 5 482 413 A discloses a pneumatic tool comprising a motor element that includes a body in which a pneumatic motor is housed.
  • WO 97/47436 A1 discloses a clamping chuck that holds an auxiliary rotary tool such as a screwdriver or a cutting tool.
  • US 5 407 293 A discloses a coupling apparatus for a medical instrument.
  • US 2005/034573 A1 discloses a hand tool that includes a retractable shank, a handle, an elastic member, and at least one fixing pin.
  • the invention When viewed from a first aspect, provides a fastening mechanism comprising a male component and a female component;
  • the present invention provides a fastening mechanism comprising a male component and a female component.
  • the male component is arranged to be inserted into a bore of the female component, thereby locating a locking member of the female component within a groove of the male component. This engagement prevents relative axial displacement of the male and female components.
  • the locking member of the female component is further arranged to be received within a cutaway of the male component. The engagement between the locking member and the cutaway helps to prevent both the relative axial and rotational movement of the male and female components, thereby providing a more reliable connection, e.g. which may not be disconnected accidentally.
  • the claimed fastening mechanism may be realised without the use of protruding parts, the present invention may be provided with a layer of insulating material without impairing its function. Therefore, the claimed fastening mechanism is suitable for use with insulated tools and indeed in a set of embodiments the male and female components both comprise an electrically insulating external layer - e.g. one at least .
  • the male component comprises a handle of a tool (e.g. a torque wrench). However, in some embodiments, the male component comprises an end fitting (e.g for attaching to a handle of a tool). In some embodiments, the female component comprises a handle of a tool (e.g. a torque wrench). However, in some embodiments, the female component comprises an end fitting (e.g for attaching to a handle of a tool).
  • the male component may comprise a spigot.
  • the spigot may be arranged at a distal end of the male component.
  • the spigot is substantially cylindrical.
  • the spigot may be between 5mm and 35mm in diameter.
  • the bore is cylindrical.
  • the bore may extend along a central axis of the female component.
  • the bore may be arranged to receive the spigot of the male component.
  • the cutaway may be defined by a planar first surface having a normal parallel to the longitudinal axis of the male component and a second surface radially and axially perpendicular to the first surface.
  • first surface When the locking member is brought into engagement with the cutaway, the first surface may act to limit relative axial displacement of the male and female components and the second surface may act to limit relative rotational movement. This arrangement may reduce the likelihood that the locking member accidentally slips out of engagement with the cutaway.
  • the male and female components are arranged to be unfastened by moving the female component relative to the male component from the second position to the first position.
  • the locking member must first be axially moved out of the cutaway. The components may be subsequently rotated relative to each other to allow axial separation.
  • the spigot 4 further defines a cutaway 14 that extends from a radial edge of the flat surface 10 in a direction that is perpendicular to the plane of the flat surface 10.
  • the spigot 4 further comprises a biasing member 16, e.g. a compression spring.
  • a biasing member 16 e.g. a compression spring.
  • an end of the biasing member 16 protrudes axially from the distal end of the spigot 4.
  • the end of the biasing member 16 is flush with the distal end of the spigot 4.
  • Figure 2 shows a side view of the spigot 4 shown in Figure 1 and the removable end fitting 6 prior to attachment.
  • the end fitting 6 comprises a body 18 that could comprise any desired functional head for engaging with a workpiece. (not shown).
  • the body 18 of the end fitting 6 further defines a cylindrical bore 20 that extends partially into the body 18. The diameter of the bore 20 is designed to accommodate the spigot 4.
  • Figure 4 shows a plan view of the fastening mechanism 2 after a subsequent stage of fastening.
  • the end fitting 6 is rotated 90 degrees relative to the handle 3 such that the pin 24 is brought into engagement with the groove 12 and then rotates around it. This attaches the end fitting 6 to the spigot 4 of the handle 3 by preventing them from being axially separated.
  • the bias force of the biasing member 16 pushes the end fitting 6 away from the spigot 4, thereby moving the pin 24 into engagement with the cutaway 14, as shown in Figures 5a and 5b .
  • This engagement between the pin 24 and the cutaway 14 ensures that the pin 24 is locked into position and prevents both relative axial and rotational movement between the spigot 4 and the end fitting 6.
  • the biasing member 16 ensures the seating of the pin 24 within the cutaway 14 to prevent accidental disengagement.
  • the fastening mechanism 2 may be released by first exerting an axial force on the spigot 4, against the force of the biasing member 16, such that the pin 24 is brought out of engagement with the cutaway 14. In this way, the fastening mechanism 2 is moved to the intermediate stage shown in Figure 4 .
  • the end fitting 6 can then be rotated 90 degrees relative to the spigot 4, thereby sliding the pin 24 circumferentially around the groove 12 until the pin 24 is brought into alignment with the flat surface 10, as shown in Figures 3a and 3b .
  • the spigot 4 may be withdrawn from the bore 20 of the end fitting 6 to fully release the fastening mechanism 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)

Claims (15)

  1. Befestigungsmechanismus (2), der eine männliche Komponente (4) und eine weibliche Komponente (6) umfasst;
    wobei die weibliche Komponente umfasst
    eine Bohrung (20), die angeordnet ist, um die männliche Komponente aufzunehmen; und
    ein Verriegelungselement (24), das durch die Bohrung vorspringt;
    wobei die männliche Komponente definiert
    eine Nut (12), die sich mindestens teilweise um eine Außenoberfläche der männlichen Komponente herum erstreckt und angeordnet ist, um in einer ersten Position der weiblichen Komponente in Bezug zur männlichen Komponente das Verriegelungselement aufzunehmen; und
    einen Ausschnitt (14), der sich aus der Nut erstreckt und angeordnet ist, um in einer zweiten Position der weiblichen Komponente in Bezug zur männlichen Komponente das Verriegelungselement aufzunehmen.
  2. Befestigungsmechanismus (2) nach Anspruch 1, wobei die männliche Komponente (4) einen Griff eines Werkzeugs umfasst und die weibliche Komponente (6) ein Endstück umfasst.
  3. Befestigungsmechanismus (2) nach einem vorstehenden Anspruch, wobei das Verriegelungselement (24) zylindrisch ist.
  4. Befestigungsmechanismus (2) nach einem vorstehenden Anspruch, wobei die Nut (12) einen bogenförmigen Querschnitt umfasst.
  5. Befestigungsmechanismus (2) nach einem vorstehenden Anspruch, wobei die männliche Komponente (4) eine Schlüsseloberfläche (10) umfasst, die bemessen ist, um am Verriegelungselement (24) vorbeizugleiten, wenn die männliche Komponente in die Bohrung (20) eingesetzt wird.
  6. Befestigungsmechanismus (2) nach Anspruch 5, wobei sich die Schlüsseloberfläche (10) axial zwischen einem distalen Ende der männlichen Komponente (4) und der Nut (12) erstreckt.
  7. Befestigungsmechanismus (2) nach Anspruch 5 oder 6, wobei die Schlüsseloberfläche (10) flach ist.
  8. Befestigungsmechanismus (2) nach einem der Ansprüche 5 bis 7, wobei der Ausschnitt (14) senkrecht zur Schlüsseloberfläche (10) verläuft.
  9. Befestigungsmechanismus (2) nach einem vorstehenden Anspruch, wobei die männliche Komponente (4) einen Anschlag (8a) umfasst, und wobei das Verriegelungselement (24) angeordnet ist, um in der ersten Position der weiblichen Komponente (6) in Bezug zur männlichen Komponente am Anschlag anzuliegen.
  10. Befestigungsmechanismus (2) nach Anspruch 9, wobei die Nut (12) an den Anschlag (8a) angrenzt.
  11. Befestigungsmechanismus (2) nach einem vorstehenden Anspruch, wobei sich der Ausschnitt (14) aus einer Wand der Nut (12) erstreckt.
  12. Befestigungsmechanismus (2) nach einem vorstehenden Anspruch, wobei sich der Ausschnitt (14) bis zu mindestens der gleichen radialen Tiefe wie die Tiefe der Nut (12) erstreckt.
  13. Befestigungsmechanismus (2) nach einem vorstehenden Anspruch, wobei der Ausschnitt (14) eine flache erste Oberfläche, die eine Normale parallel zur Längsachse der männlichen Komponente (4) aufweist, und eine zweite Oberfläche radial und axial senkrecht zur ersten Fläche umfasst.
  14. Befestigungsmechanismus (2) nach einem vorstehenden Anspruch, wobei der Ausschnitt (14) einen gekrümmten Sitz für das Verriegelungselement (24) definiert.
  15. Befestigungsmechanismus (2) nach einem vorstehenden Anspruch, der weiter ein Vorspannelement (16) umfasst, das angeordnet ist, um das Verriegelungselement (24) in der zweiten Position in den Ausschnitt (14) vorzuspannen.
EP21717176.8A 2020-04-06 2021-03-31 Befestigungsmechanismus Active EP4132750B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2005081.1A GB2593898A (en) 2020-04-06 2020-04-06 Fastening Mechanism
PCT/GB2021/050810 WO2021205147A1 (en) 2020-04-06 2021-03-31 Fastening mechanism

Publications (2)

Publication Number Publication Date
EP4132750A1 EP4132750A1 (de) 2023-02-15
EP4132750B1 true EP4132750B1 (de) 2025-06-25

Family

ID=70768999

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21717176.8A Active EP4132750B1 (de) 2020-04-06 2021-03-31 Befestigungsmechanismus

Country Status (3)

Country Link
EP (1) EP4132750B1 (de)
GB (1) GB2593898A (de)
WO (1) WO2021205147A1 (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5407293A (en) * 1993-04-29 1995-04-18 Crainich; Lawrence Coupling apparatus for medical instrument
FR2704793B1 (fr) * 1993-05-06 1995-07-21 Maire Charles Ets Outil pneumatique.
WO1997047436A1 (de) * 1996-06-13 1997-12-18 Institut Straumann Ag Spannfutter für ein einsteckbares werkzeug
US6959629B2 (en) * 2003-08-15 2005-11-01 Chih-Ching Hsien Hand tool having a retractable handle structure
TWM308139U (en) * 2006-06-26 2007-03-21 Yi-Ting Lin Structure of adjustable wrench
US20110056338A1 (en) * 2009-09-07 2011-03-10 Chih-Ching Hsieh Contractible wrench structure

Also Published As

Publication number Publication date
GB202005081D0 (en) 2020-05-20
WO2021205147A1 (en) 2021-10-14
GB2593898A (en) 2021-10-13
EP4132750A1 (de) 2023-02-15

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