EP2886252A1 - Clé multimodale - Google Patents

Clé multimodale Download PDF

Info

Publication number
EP2886252A1
EP2886252A1 EP13199492.3A EP13199492A EP2886252A1 EP 2886252 A1 EP2886252 A1 EP 2886252A1 EP 13199492 A EP13199492 A EP 13199492A EP 2886252 A1 EP2886252 A1 EP 2886252A1
Authority
EP
European Patent Office
Prior art keywords
mode
pawl
toothed wheel
groove
handle
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
EP13199492.3A
Other languages
German (de)
English (en)
Other versions
EP2886252B1 (fr
Inventor
Yi Min Wu
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 SI201330185A priority Critical patent/SI2886252T1/sl
Priority to EP13199492.3A priority patent/EP2886252B1/fr
Priority to HUE13199492A priority patent/HUE027822T2/en
Priority to PL13199492.3T priority patent/PL2886252T3/pl
Publication of EP2886252A1 publication Critical patent/EP2886252A1/fr
Application granted granted Critical
Publication of EP2886252B1 publication Critical patent/EP2886252B1/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
    • 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
    • B25B13/462—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 a direction radial to the tool operating axis
    • B25B13/463—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 a direction radial to the tool operating axis a pawl engaging an externally toothed wheel

Definitions

  • the present invention relates to a one-way wrench and, more particularly, to a multi-mode one-way wrench.
  • a one-way wrench (or "ratchet wrench”) includes a hollow head, a toothed wheel placed in the head, and a pawl placed in the head.
  • the pawl As the head is rotated in an active direction, the pawl is engaged with the toothed wheel so that the head rotates the toothed wheel via the pawl.
  • the pawl As the head is rotated in an idle direction, the pawl is allowed to rattle on the toothed wheel so that the head does not rotate the toothed wheel in the idle direction.
  • the toothed wheel is engaged with a nut for example.
  • the head is rotated in the active direction to rotate the toothed wheel for an angle, and the head is rotated in the idle direction for an adequate angle before the head is rotated in the active direction again to rotate the wheel.
  • This process is repeated so that the nut is engaged with a screw or removed from a screw.
  • a one-way wrench is particularly useful in a limited space.
  • the head must be rotated in the idle direction for at least a minimum angle before the head can rotate the toothed wheel in the active direction again.
  • the minimum angle is 10° where the toothed wheel includes 36 teeth but only 5° where the toothed wheel includes 72 teeth.
  • the present invention is intended to obviate or at least alleviate the problems encountered in prior art.
  • the multi-mode one-way wrench includes a handle, a toothed wheel, two pawls and a switch.
  • the handle includes a head and two grooves.
  • the toothed wheel is rotationally placed in the head and formed with teeth.
  • the first pawl is movably placed in the first groove for engagement with the toothed wheel.
  • the second pawl is movably placed in the second groove for engagement with the toothed wheel when the first pawl is disengaged from the first pawl.
  • the switch is operable for moving the second pawl between a first mode for engagement with the toothed wheel and a second mode kept from engagement with the toothed wheel.
  • the first groove is biased from the second groove by an angle of 360° ⁇ (M+1/2) ⁇ N, wherein N is an integer that represents the number of the teeth and M is any proper integer.
  • the multi-mode one-way wrench 10 includes a handle 11, a toothed wheel 30, a pawl unit 40, a cover 50 and a switch 60.
  • the handle 11 includes an enlarged hollow head 20 formed at an end of a grip 12.
  • the grip 12 is formed with two grooves 13 and 14, a screw hole 15 and two bores 16 and 17 near the head 20.
  • the groove 13 extends along a centerline biased from that of the groove 14 by an angle of 360° ⁇ (M+1/2)/N, wherein N is an integer that represents the number of the teeth 34 and M is any proper integer.
  • the head 20 includes a primary wall 26, an extensive wall 21 extending from an upper edge of the primary wall 26, and a flange 27 extending from an internal side of the primary wall 26.
  • the extensive wall 21 is a C-shaped element with two ends 25.
  • the thickness of the extensive wall 21 is smaller than that of the primary wall 26 so that there is a shoulder 24 between the extensive wall 21 and the primary wall 26.
  • the primary wall 26, the extensive wall 21 and the flange 27 together make a stepped space 22.
  • the stepped space 22 is in communication with the grooves 13 and 14.
  • the toothed wheel 30 is formed with two axles 32, teeth 34 and a non-circular aperture 36.
  • One of the axles 32 (the “lower axle”) extends from a lower side of the toothed wheel 30 while the other axle 32 (the “upper axle”) extends from an upper side of the toothed wheel 30.
  • the teeth 34 extend from the periphery of the toothed wheel 30 in a radial manner.
  • the non-circular aperture 36 axially extends throughout the toothed wheel 30 including the axle 32.
  • teeth 34 there are 36 (thirty-six) teeth 34 each covering an angle of 10°.
  • the angle between the centerline of the groove 13 and that of the groove 14 is 35° for example.
  • the pawl unit 40 includes two pawls 41 and 43 and two springs 42.
  • the pawls 41 and 43 are both in the form of a cuboid.
  • the pawl 43 includes a stem 44 extending from an upper end.
  • the cover 50 includes a ring 51, a tab 52 extending from the ring 51, and two shoulders 54 formed between the ring 51 and the tab 52.
  • the thickness of the ring 51 is larger than that of the tab 52 so that there is a shoulder 53 between the ring 51 and the tab 52.
  • the shoulder 53 extends along in an arc.
  • the tab 52 includes a window 55 and a countersink hole 56.
  • the switch 60 includes a lever 62 at an end and two claws 65 at an opposite end.
  • the switch 60 further includes an aperture 61 axially made therein, a cutout 66 between the claws 65, and a slot 67extending about the aperture 61.
  • the switch 60 further includes two recesses 68 in a lower side and a marking unit 64 on an upper side.
  • the marking unit 64 includes two numbers "36" and "72" to represent a 36-teeth mode and a 72-teeth mode respectively.
  • the toothed wheel 30 is placed in the stepped space 22.
  • the lower axle 32 is inserted in an opening around which the flange 27 extends.
  • the flange 27 is used as a bearing for the lower axle 32.
  • the teeth 34 are supported on the shoulder 23.
  • the pawl 41 and one of the springs 42 are placed in the groove 13.
  • the first spring 42 is compressed between the pawl 41 and a closed end of the groove 13.
  • the first spring 42 tends to push the pawl 41 into engagement with at least one of the teeth 34, out of an open end of the groove 13.
  • the pawl 43 and the other spring 42 (the “second spring") are placed in the groove 14.
  • the second spring 42 is compressed between the pawl 43 and a closed end of the groove 14.
  • the second spring 42 tends to push the pawl 41 into engagement with at least one of the teeth 34, out of an open end of the groove 14.
  • a spring 82 and a ball 84 are sequentially placed in the bore 16.
  • the spring 82 is compressed between the ball 84 and a closed end of the bore 16.
  • the spring 82 tends to push the ball 84 out of an open end of the bore 16.
  • a rod 86 is fit in the bore 17.
  • the switch 60 is placed on the grip 12.
  • the ball 84 is placed in one of the recesses 68.
  • the rod 86 is inserted in the slot 67.
  • the stem 44 is placed in the cutout 66.
  • the cover 50 is placed on the handle 11.
  • the ring 51 is placed on the shoulder 24 and confined in the extensive wall 21.
  • the shoulders 54 are in contact with the ends 25 of the extensive wall 21 respectively.
  • the upper axle 32 is inserted in an opening around which the ring 51 extends.
  • the ring 51 is used as a bearing for the upper axle 32.
  • the tab 52 is placed on the claws 65 and confined in a cavity 63 made in the switch 60.
  • a screw 80 is inserted in the screw hole 15 through the countersink hole 56 and the aperture 61.
  • the multi-mode one-way wrench 10 is in the 72-teeth mode, and the number "72" is accordingly visible through the window 55.
  • the pawl 43 is allowed to engage with the teeth 34 as the stem 44 is allowed to move in the cutout 66.
  • the pawl 41 is allowed to engage with the teeth 34.
  • a left side of the pawl 41 is in contact with a right side of one of the teeth 34.
  • the handle 11 is pivoted clockwise to rotate the toothed wheel 30 since the head 20 pushes a right side of the pawl 41 and the left side of the pawl 41 pushes the right side of the tooth 34.
  • the handle 11 is pivoted counterclockwise for half of the angle of one tooth 34, i.e., 5°, so that the left side of the pawl 43 is in contact with a right side of another tooth 34.
  • the handle 11 is pivoted clockwise to rotate the toothed wheel 30 since the head 20 pushes a right side of the pawl 43 and the left side of the pawl 43 pushes the right side of the tooth 34.
  • the ball 84 is placed in one of the recesses 68 to keep the multi-mode one-way wrench 10 in the 72-teeth mode in an elastic manner.
  • the multi-mode one-way wrench 10 is in the 36-teeth mode, and the number "36" is accordingly visible through the window 55.
  • the pawl 43 is prevented from engagement with the teeth 34 as the stem 44 is restrained by one of the claws 65.
  • the pawl 41 is allowed to engage with the teeth 34.
  • the left side of the pawl 41 is in contact with a right side of one of the teeth 34.
  • the handle 11 is pivoted clockwise to rotate the toothed wheel 30 since the head 20 pushes a right side of the pawl 41 and the left side of the pawl 41 pushes the right side of the tooth 34.
  • the handle 11 is pivoted counterclockwise for the angle of one tooth 34, i.e., 10°, so that the left side of the pawl 41 is in contact with a right side of another tooth 34.
  • the handle 11 is pivoted clockwise to rotate the toothed wheel 30 since the head 20 pushes a right side of the pawl 41 and the left side of the pawl 41 pushes the right side of the tooth 34.
  • the ball 84 is placed in the other recess 68 to keep the multi-mode one-way wrench 10 in the 36-teeth mode in an elastic manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP13199492.3A 2013-12-23 2013-12-23 Clé multimodale Active EP2886252B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SI201330185A SI2886252T1 (sl) 2013-12-23 2013-12-23 Multimodalni ključ
EP13199492.3A EP2886252B1 (fr) 2013-12-23 2013-12-23 Clé multimodale
HUE13199492A HUE027822T2 (en) 2013-12-23 2013-12-23 Multi-mode wrench
PL13199492.3T PL2886252T3 (pl) 2013-12-23 2013-12-23 Klucz wielotrybowy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13199492.3A EP2886252B1 (fr) 2013-12-23 2013-12-23 Clé multimodale

Publications (2)

Publication Number Publication Date
EP2886252A1 true EP2886252A1 (fr) 2015-06-24
EP2886252B1 EP2886252B1 (fr) 2016-03-30

Family

ID=49885062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13199492.3A Active EP2886252B1 (fr) 2013-12-23 2013-12-23 Clé multimodale

Country Status (4)

Country Link
EP (1) EP2886252B1 (fr)
HU (1) HUE027822T2 (fr)
PL (1) PL2886252T3 (fr)
SI (1) SI2886252T1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040089108A1 (en) * 2002-11-11 2004-05-13 Chuck Chang Wrench having a locking device with a smaller driving angle
US20120167723A1 (en) * 2009-04-07 2012-07-05 Steven James Gapp Box end ratchet wrench with reduced ratcheting arc

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040089108A1 (en) * 2002-11-11 2004-05-13 Chuck Chang Wrench having a locking device with a smaller driving angle
US20120167723A1 (en) * 2009-04-07 2012-07-05 Steven James Gapp Box end ratchet wrench with reduced ratcheting arc

Also Published As

Publication number Publication date
PL2886252T3 (pl) 2016-09-30
EP2886252B1 (fr) 2016-03-30
SI2886252T1 (sl) 2016-07-29
HUE027822T2 (en) 2016-11-28

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