EP0485661B1 - Clé à écrous - Google Patents

Clé à écrous Download PDF

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Publication number
EP0485661B1
EP0485661B1 EP90121979A EP90121979A EP0485661B1 EP 0485661 B1 EP0485661 B1 EP 0485661B1 EP 90121979 A EP90121979 A EP 90121979A EP 90121979 A EP90121979 A EP 90121979A EP 0485661 B1 EP0485661 B1 EP 0485661B1
Authority
EP
European Patent Office
Prior art keywords
main body
coupling element
lateral edge
tooth
wrench
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
EP90121979A
Other languages
German (de)
English (en)
Other versions
EP0485661A1 (fr
Inventor
Dora Hsiao-Ling Huang
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to ES90121979T priority Critical patent/ES2070245T3/es
Priority to EP90121979A priority patent/EP0485661B1/fr
Priority to DE69016664T priority patent/DE69016664T2/de
Priority to AT90121979T priority patent/ATE117928T1/de
Priority to CA002030473A priority patent/CA2030473C/fr
Publication of EP0485661A1 publication Critical patent/EP0485661A1/fr
Application granted granted Critical
Publication of EP0485661B1 publication Critical patent/EP0485661B1/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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
    • B25B21/026—Impact clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
    • 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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • 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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket

Definitions

  • This invention relates to a wrench with the features cited in the preamble of claim 1.
  • US-A-4 920 831 discloses an electric wrench with the features cited in the preamble of claim 1.
  • This wrench is provided with an arrestor disposed between the torque source and the nut driving shaft so as to provide an automatic control of timing of impact.
  • the wrench according to US-A-4 920 831 also posseses certain disadvantages.
  • the major drawback is that the design is complicated and thus easy to be damaged.
  • a wrench as such has a simplified structure, so that the manufacturing costs including time required to make the parts and the material costs of the parts are cut down.
  • the overall weight is reduced which helps a user to hold and operate the wrench.
  • the control pins correctly maintain the coupling element in the neutral position where the edges of the coupling element are not contacted. This provides a good operation of cyclically impacting the control member by the follower shaft and improves the overall effectiveness thereof.
  • the sharpened ends of the control pins facilitate insertion thereof into the holes formed in the coupling element to maintain the coupling element in the neutral position.
  • a wrench in accordance with the invention comprises a housing 102, inside which a reversible motor 101 serving as a torque source and a torque transmitting mechanism 103 connected thereto are disposed.
  • the reversible motor 101 is controlled by a switch 104 and the rotation direction thereof is determined by a steering control device 105.
  • the power source of the wrench 100 can be any suitable external source (not shown), such as the electric system of a vehicle (not shown). since the connection of the motor to an external power source is known to those skilled in the art, no detailed description will be given herein.
  • the torque transmitting mechanism 103 comprises a hollow cylindrical main body 10 with one end closed.
  • the closed end has a projection 12 formed thereon with a central hole 13 running therethrough in parallel with an axis of the cylinder 10.
  • the hole 13 is engageable with a spindle 106 (Fig. 1) of the motor 101.
  • the main body 10 has a radial notch 11 into which a coupling element 14 of the complemental shape is inserted and is rotatably fixed thereon with a pivotal pin 15.
  • the pivotal pin 15 is parallel but not co-axial with the axis of the main body 10 so as to provide the coupling element 14 with a relative rotational movement with respect to the main body 10.
  • the coupling element 14 has thickened lateral edges 16 which slightly project into the interior of the main body 10. This is best seen in Fig.5. to facilitate the rotation of the coupling element 14 about the pivotal pin 15, an annular projection 17 around the pivotal pin 15 is provided on each axial end of the coupling element 14.
  • the annular projections 17 are best seen in Figs. 3 and 4.
  • a plurality of spring-biased control pins 18 are provided.
  • Each of the control pins 18 has an enlarged end 19 and a sharpened end 20.
  • the control pins 18 are slidable disposed in holes 21 formed on the closed end of the main body 10 and biased away from the coupling element 14 and finally inserted into holes 23 formed on the coupling element 14. The insertion of the control pins 18 into holes 23 prevents the coupling element 14 from being rotated about the pivotal pin 15.
  • An arrestor 30 is provided on the projection 12 of the main body 10 and is fixed thereon by a ring retainer 31.
  • the arrestor 30 comprises a pair of spring-biased weight blocks 32 which, under the circumstances of fast rotation, move outwards due to the action of centrifugal forces and will pull a disk 33 which is slidable along the projection 12 and abuts against the control pins 18 away from the main body 10 to allow the control pins 18 leaving the holes 23 under the action of spring forces.
  • This enables the rotation of the coupling element 14 about the pivotal pin 15.
  • the weight blocks 31 withdraw back and the disk 33 moves towards the main body 10. This pushes the control pins 18 into the holes 23 and forces the coupling element 14 back to its non-rotated position.
  • the follower shaft 40 has an expanded end 41 disposed inside the main body 10 and a shaped end 42 to engage a socket (not shown). Formed around the expanded end 41 are a pair of spaced teeth 43 which are inclined toward each other and engageable with the lateral edges 16 of the coupling element 14. These teeth 43, when engaging with one of the lateral edges 16 of the coupling element 14 transmit angular momentum from the main body 10 to the follower shaft 40 and then to the socket (not shown). With an axis co-axial with the cylindrical main body 10, the follower shaft 40 rotates with the main body 10 when the teeth 43 engage the coupling element 14.
  • bearings are necessary and are disposed at any suitable locations.
  • a spring-biased ball 24 is disposed in a hole 25 formed adjacent to each of the lateral edges 16 of the coupling element 14.
  • the balls 24 may be fixed inside the holes 25 by any suitable means, such as screws 26.
  • the balls 24 are allowed to partially protrude out of the inside surface of the coupling element 14. This is best seen in Figs. 5 and 6. With the partial protrusion, the balls 24 are contactable with the teeth 43 each time a tooth 43 passes the balls 24.
  • the coupling element 14 When the coupling element 14 is allowed to rotate about the pivotal pin 15 ( as the situation shown in Fig. 4), the coupling element 14 will be rotated about the pivotal pin 15 by the contact of one of the balls 24 with one of the teeth 43. The contact makes the opposing lateral edge 16 move into the space between the teeth 43 and later abut one of the teeth 43 (Fig. 6). Since this happens rapidly, an impact will be generated and transmitted to the socket (not shown) by way of the follower shaft 40. This impact will then be applied to a nut (not shown) to be loosened and the resistance of the nut results in the slow-down of the follower shaft 40 together with the main body 10.

Landscapes

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

Claims (4)

  1. Clé à écrous (100) comprenant un boîtier (102), à l'intérieur un moteur réversible (101) servant de source de couple commandé par des moyens contacteurs (104) et un mécanisme de transmission de couple (103) relié à un axe (106) dudit moteur (101) pour transmettre le couple à un manchon s'engageant avec celui-ci, ledit mécanisme de transmission de couple (103) comprenant :
    un corps principal cylindrique creux (10) comportant une partie intérieure avec une extrémité fermée, ladite extrémité fermée ayant une partie en saillie (12) formée sur celle-ci parallèlement à un axe dudit corps principal (10), un trou (13), coaxial avec ledit axe du corps principal (10), formé sur ladite partie en saillie (12) pour recevoir ledit axe (106) à l'intérieur de celui-ci, ledit corps principal (10) comportant en outre une entaille radiale (11) dans laquelle un élément d'accouplement (14) formé de manière complémentaire est introduit et fixé de manière rotative sur celui-ci par un pivot (15) qui est parallèle mais non coaxial audit axe de sorte que ledit élément d'accouplement (14) est rotatif par rapport au corps principal (10) autour dudit pivot (15) pour qu'un premier bord latéral (16) dudit élément d'accouplement (14) tourne à l'intérieur dudit corps principal (10);
    une pluralité de goujons de commande (18), chacun desdits goujons de commande (18) étant positionné dans un trou (21) aménagé sur l'extrémité fermée du corps principal (10);
    un dispositif d'arrêt (30) fixé sur ladite partie en saillie (12) par des moyens de fixation (31), ledit dispositif d'arrêt (30) comprenant une paire de masselottes (32) et un disque (33) coulissant le long de ladite partie en saillie (12), ledit disque (33) étant poussé vers l'extrémité fermée du corps principal (10) lorsque ledit corps principal (10) ne tourne pas, sous l'action de forces centrifuges résultant d'une vitesse de rotation élevée dudit corps principal (10) avec ledit dispositif d'arrêt (30), lesdites masselottes (32) se déplaçant vers l'extérieur et tirant ledit disque (33) de ladite extrémité fermée du corps principal (10); et
    un arbre mené (40) ayant une extrémité effilée (42) pour s'engager dans ledit manchon et une extrémité élargie (41) avec une paire de dents (43), une première et une seconde, formées autour de celui-ci, ladite extrémité élargie (41) de l'arbre mené (40) étant placée à l'intérieur dudit corps principal (10) de sorte que , lorsque ledit élément d'accouplement (14) tourne autour dudit pivot (15) pour que ledit premier bord latéral entre dans ladite partie intérieure, ledit premier bord latéral (16) entre en contact et s'engage sur ladite première dent (43) pour transmettre une quantité de mouvement angulaire résultant d'un couple fourni par ledit moteur (101) à l'arbre mené (40) et audit manchon;
    lorsque ledit premier bord latéral (16) heurte ladite première dent (43), la vitesse de rotation dudit corps principal (10) étant soudainement et brutalement décélérée et ensuite ledit premier bord latéral (16) étant fixé de manière non rotative sur le pivot (15) et se dégageant de ladite première dent (43) pour permettre audit corps principal (10) d'accélérer de nouveau,
    caractérisée en ce que,
    chacun desdits goujons de commande (18) étant monté sur ressort et ayant une extrémité élargie (19) et une extrémité effilée (20), ladite extrémité effilée (20) pouvant coulisser dans les trous en rapport (23) aménagés dans l'élément d'accouplement (14) pour éviter que lesdits goujons de commande (18) ne soient poussés contre les ressorts (22) de ceux-ci;
    lesdits goujons de commande (18) réagissent réciproquement avec ledit disque (33) et sont poussés dans lesdits trous (23) aménagés dans ledit élément d'accouplement (14) par ledit disque (33) lorsque ledit corps principal ne tourne pas de sorte que l'élément d'accouplement (14) ne peut tourner par rapport audit pivot (15) et lesdits goujons de commande (18) quittent lesdits trous (23) aménagés dans ledit élément d'accouplement (14) sous l'action desdits ressorts (22) lorsque ledit corps principal tourne à une vitesse élevée de sorte que ledit élément d'accouplement soit en position rotative par rapport audit pivot (15).
  2. Clé à écrous (100) selon la revendication 1,
    caractérisée en ce que,
    ledit élément d'accouplement (14) comprenant en outre une première bille (24) montée sur ressort placée prés d'un second bord latéral (16) dudit élément d'accouplement (14) qui est opposé audit premier bord latéral (16), ladite première bille (24) étant partiellement en saillie à l'intérieur dudit corps principal (10) de sorte que, lorsque ladite première bille (24) passe ladite seconde dent (43), ledit premier bord latéral (16) tourne dans un espace entre lesdites dents (43) et s'appuie contre ladite première dent (43).
  3. Clé a écrous (100) selon la revendication 2,
    caractérisée en ce que,
    ledit élément d'accouplement (14) comprenant en outre une seconde bille (24) montée sur ressort placée près dudit premier bord latéral (16) avec ladite seconde bille (24) partiellement en saillie à l'intérieur dudit corps principal (10) de sorte que, lorsque ladite seconde bille (24) passe ladite première dent (43), ledit second bord latéral (16) tourne dans ledit espace entre lesdites dents (43) et s'appuie contre ladite seconde dent (43).
  4. Clé a écrous (100) selon la revendication 1, dans laquelle les moyens de fixation (31) sont une bague de retenue.
EP90121979A 1990-11-16 1990-11-16 Clé à écrous Expired - Lifetime EP0485661B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES90121979T ES2070245T3 (es) 1990-11-16 1990-11-16 Llave de tuercas.
EP90121979A EP0485661B1 (fr) 1990-11-16 1990-11-16 Clé à écrous
DE69016664T DE69016664T2 (de) 1990-11-16 1990-11-16 Schraubenschlüssel.
AT90121979T ATE117928T1 (de) 1990-11-16 1990-11-16 Schraubenschlüssel.
CA002030473A CA2030473C (fr) 1990-11-16 1990-11-21 Cle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP90121979A EP0485661B1 (fr) 1990-11-16 1990-11-16 Clé à écrous
CA002030473A CA2030473C (fr) 1990-11-16 1990-11-21 Cle

Publications (2)

Publication Number Publication Date
EP0485661A1 EP0485661A1 (fr) 1992-05-20
EP0485661B1 true EP0485661B1 (fr) 1995-02-01

Family

ID=25674378

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90121979A Expired - Lifetime EP0485661B1 (fr) 1990-11-16 1990-11-16 Clé à écrous

Country Status (5)

Country Link
EP (1) EP0485661B1 (fr)
AT (1) ATE117928T1 (fr)
CA (1) CA2030473C (fr)
DE (1) DE69016664T2 (fr)
ES (1) ES2070245T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2087321A1 (fr) * 1993-01-14 1994-07-15 Chen S.-H. Huang Mecanisme d'entrainement pour boulonneuse
US5771516A (en) * 1996-08-26 1998-06-30 Huang; Chen Shu-Hsia Exchangeable power hand tool
EP0873823B1 (fr) * 1997-04-21 2000-11-22 Mu-Young Yoon Outil de vissage motorisé
CN1282650A (zh) * 2000-09-08 2001-02-07 丁心河 全自动电炮

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0381787A1 (fr) * 1989-02-06 1990-08-16 Huang, Dora Hsiao-Ling Clés à écrous

Also Published As

Publication number Publication date
ATE117928T1 (de) 1995-02-15
DE69016664T2 (de) 1995-05-24
DE69016664D1 (de) 1995-03-16
CA2030473C (fr) 1994-09-06
ES2070245T3 (es) 1995-06-01
EP0485661A1 (fr) 1992-05-20
CA2030473A1 (fr) 1992-05-22

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