EP2135708A1 - Clé à cliquet à trois positions fonctionnelles - Google Patents

Clé à cliquet à trois positions fonctionnelles Download PDF

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Publication number
EP2135708A1
EP2135708A1 EP08170202A EP08170202A EP2135708A1 EP 2135708 A1 EP2135708 A1 EP 2135708A1 EP 08170202 A EP08170202 A EP 08170202A EP 08170202 A EP08170202 A EP 08170202A EP 2135708 A1 EP2135708 A1 EP 2135708A1
Authority
EP
European Patent Office
Prior art keywords
teeth
drive member
compartment
control member
pawl
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.)
Withdrawn
Application number
EP08170202A
Other languages
German (de)
English (en)
Inventor
Bobby Hu
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
Publication of EP2135708A1 publication Critical patent/EP2135708A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • B25B13/468—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member with possibility of locking the ratchet mechanism
    • 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 ratchet wrench and, more particularly, to a ratchet wrench that includes three operative positions.
  • Taiwan Patent Publication No. 589241 entitled “IMPROVED RATCHET WRENCH STRUCTURE” discloses a ratchet wrench including a handle having an engaging hole in an end thereof. The end of the handle further includes a compartment in communication with the engaging hole and a coupling groove in communication with the compartment.
  • a driving device is mounted in the engaging hole.
  • Two pawls are slideably mounted in the compartment and selectively engaged with the driving device. Each pawl includes a peg formed thereon.
  • a manually operable control member is mounted in the coupling groove and includes a control groove with two outer corners.
  • the control member is pivotable about a pivot axis between first and second operative positions to control the driving direction and free rotational direction of the ratchet wrench by biasing one of the pawls to engage with the driving device.
  • first and second operative positions to control the driving direction and free rotational direction of the ratchet wrench by biasing one of the pawls to engage with the driving device.
  • ratchet wrench can drive fasteners such as bolts, nuts, etc. in one of two operative directions (clockwise and counterclockwise) while allowing free rotation in a reverse direction
  • the ratchet wrench can not be utilized as a conventional wrench of the type capable of driving fasteners in either direction and not allowing free rotation in the reverse direction, which may be required in some cases.
  • a user has to frequently switch the control member between the two operative positions to change the driving direction of the ratchet wrench, which is time-consuming and laborsome.
  • control groove has a wide opening extending across a large angle. Specifically, an angle between a line passing through one of the two outer corners and the pivot axis and another line passing through the other outer corner and the pivot axis is about 120°. Further, an angle between the peg of the pawl engaged with the driving device and the outer corner of the control groove disengaged from the pawl is about 50° such that the control member has to pivot idly about 50° before coming in contact with the peg of the disengaged pawl for the changing the driving direction, leading to time-consuming, inconvenient operation.
  • a ratchet wrench including a body having a driving portion and a handle interconnected to the driving portion.
  • the driving portion includes a first compartment, a second compartment in communication with the first compartment, and a third compartment in communication with the second compartment.
  • a drive member is rotatably received in the first compartment and includes a plurality of teeth in an outer periphery thereof.
  • First and second pawls are slideably received in the second compartment and each includes an inner face facing the teeth of the drive member. The inner face of each of the first and second pawls includes a plurality of teeth releasably engaged with the teeth of the drive member.
  • An elastic element is mounted between the first and second pawls to bias the first and second pawls away from each other to engage the teeth of the first and second pawls with the teeth of the drive member.
  • a control member is pivotably mounted in the third compartment and pivotable between first, second, and third operative positions about a pivot axis. The second operative position is intermediate the first and third operative positions.
  • the control member includes a control section having first and second outer corners. An angle between a first line passing through the first outer corner and the pivot axis and a second line passing through the second outer corner and the pivot axis is not greater than 100°.
  • the teeth of the second pawl are engaged with the teeth of the drive member, and the first outer corner of the control member is engaged with the first pawl to disengage the teeth of the first pawl from the teeth of the drive member, allowing the drive member to rotate in a first direction driving a fastener in the first direction, and allowing the drive member to rotate freely in a second direction reverse to the first direction without driving the fastener.
  • the teeth of the first pawl are engaged with the teeth of the drive member, and the second outer corner of the control member is engaged with the second pawl to disengage the teeth of the second pawl from the teeth of the drive member, allowing the drive member to rotate in the second direction driving the fastener in the second direction, and allowing the drive member to rotate freely in the first direction without driving the fastener.
  • FIG. 1 shows a perspective view of a ratchet wrench with three operative positions according to the preferred teachings of the present invention.
  • FIG. 2 shows an exploded, perspective view of the ratchet wrench of FIG. 1 .
  • FIG. 3 shows a bottom, perspective view of a control member of the ratchet wrench of FIG. 1 .
  • FIG. 4 shows a partial, cross sectional view of the ratchet wrench of FIG. 1 according to section line 4-4 of FIG. 1 .
  • FIG. 5 shows a partial, cross sectional view of the ratchet wrench of FIG. 1 according to section line 5-5 of FIG. 4 with the control member in a second operative position.
  • FIG. 6 shows a partial, cross sectional view similar to FIG. 5 with the control member in a third operative position.
  • FIG. 7 shows a partial, cross sectional view similar to FIG. 5 with the control member in a first operative position.
  • FIG. 8 shows a partial, cross sectional view of a ratchet wrench of another embodiment according to the preferred teachings of the present invention.
  • FIG. 9 shows a partial, cross sectional view of a ratchet wrench of a modified embodiment according to the preferred teachings of the present invention.
  • FIG. 10 shows a partial, cross sectional view of a ratchet wrench of another modified embodiment according to the preferred teachings of the present invention.
  • a ratchet wrench according to the preferred teachings of the present invention is shown in the drawings and generally includes a body 10 having a driving portion 11 and a handle 12 interconnected to driving portion 11.
  • Driving portion 11 includes opposite first and second sides 18 and 19 and a first compartment 13 in the most preferred form shown as a through-hole extending from first side 19 through second side 19.
  • An annular groove 131 is defined in an end of a peripheral wall of first compartment 13.
  • a second compartment 14 is defined between first and second sides 18 and 19 and in communication with first compartment 13.
  • a third compartment 15 extends from first side 18 toward and spaced from second side 19.
  • Third compartment 15 includes a bottom wall 28 intermediate first and second sides 18 and 19.
  • a fixing hole 151 extends from bottom wall 28 through second side 19.
  • fixing hole 151 includes a first enlarged portion 58 formed in bottom wall 28 and in communication with third compartment 15, a second enlarged portion 62 formed in second side 19, and a main portion 60 between the first and second enlarged portions 58 and 62.
  • Bottom wall 28 further includes a receiving hole 152 in the most preferred form shown as a blind hole.
  • Second compartment 14 is intermediate first and third compartments 13 and 15.
  • third compartment 15 is spaced from first compartment 13 by a bridge 16 that is a part of first side 18 of driving portion 11. Further, bridge 16 forms a sidewall delimiting second compartment 14.
  • a drive member 20 is rotatably received in first compartment 13.
  • Drive member 20 includes a driving section 21 in a central portion thereof for directly or indirectly engaging with a fastener to be loosened or tightened.
  • driving section 21 includes a through-hole having a polygonal inner periphery for engaging and driving a fastener.
  • Other forms of driving section 21 would be within the skill of the art.
  • Drive member 20 further includes a plurality of teeth 22 in an outer periphery thereof.
  • An annular groove 23 is formed in an end of the outer periphery of drive member 20.
  • a retainer ring 24 in the most preferred form shown as a C-clip is partially received in annular groove 23 of drive member 20 and partially received in annular groove 131 of body 10, allowing rotation of drive member 20 relative to body 10 while retaining drive member 20 in first compartment 13.
  • first and second pawls 30 are slideably received in two ends of second compartment 14.
  • Each of first and second pawls 30 includes an inner face 36 facing teeth 22 of drive member 20.
  • Inner face 36 of each of first and second pawls 30 includes a plurality of teeth 31 releasably engaged with teeth 22 of drive member 20.
  • Each of first and second pawls 30 further includes a top face 37 transverse to inner face 36.
  • Top face 37 includes a recessed portion 33.
  • a coupling portion 32 in the preferred form shown as a peg is formed on an inner end of recessed portion 33 of top face 37 of each of first and second pawls 30.
  • Each of first and second pawls 30 further includes an end face 38 transverse to top face 37 and to inner face 36. End faces 38 face each other and each has a receptacle 34.
  • An elastic element 35 in the most preferred form shown as a spring is attached between first and second pawls 30 and includes two ends received in receptacles 34. Elastic element 35 biases first and second pawls 30 away from each other to engage teeth 31 of first and second pawls 30 with teeth 22 of drive member 20.
  • a control member 40 is pivotably mounted in third compartment 15 and seals second and third compartments 14 and 15 after assembly.
  • Control member 40 includes first and second faces 50 and 52.
  • a control section 42 in the most preferred form shown as a recessed portion is formed in second side 52.
  • the recessed portion includes first and second outer corners 48.
  • Control member 40 further includes a coupling hole 41 in second face 52.
  • a stub 56 is formed on second face 52 and includes coupling hole 41 in the form of a screw hole. Stub 56 is pivotably received in first enlarged portion 58 of fixing hole 151.
  • a pivot 47 in the most preferred form shown as a screw is extended through fixing hole 151 into coupling hole 41 of control member 40 with a head 66 of pivot 47 received in second enlarged portion 62 of fixing hole 15.
  • control member 40 is pivotable relative to body 10 about a pivot axis defined by pivot 47.
  • Second face 52 of control member 40 further includes first, second, and third positioning holes 43, 44, and 45 corresponding to first, second, and third operative positions of control member 40.
  • An angle between a first line L 1 passing through first outer corner 48 and the pivot axis and a second line L 2 passing through second outer corner 48 and the pivot axis is not greater than 70°. In another preferred form shown in FIG. 8 , the angle is not greater than 100°.
  • a positioning device 17 is provided to position control member 40 in one of the first, second, and third operative positions.
  • Positioning device 17 is received in receiving hole 152 and includes a positioning member 172 in the most preferred form shown as a ball and an elastic element 171 in the most preferred form shown as a spring. Elastic element 171 biases positioning member 172 into one of first, second, and third positioning holes 43, 44, and 45 to retain control member 40 in one of the first, second, and third operative positions.
  • Other forms of positioning device 17 would be within the skill of the art.
  • control member 40 further includes a manually operable thumb piece 46 to allow easy pivotal movement.
  • control member 40 is initially in the second operative position ( FIG. 5 ) intermediate the first and third operative positions.
  • Positioning member 172 is received in second positioning hole 44 of control member 40.
  • Coupling portions 32 of first and second pawls 30 are located between first and second outer corners 48, with first outer corner 48 in contact with coupling portion 32 of first pawl 30 and with second outer corner 48 in contact with coupling portion 32 of second pawl 30.
  • teeth 31 of each of first and second pawls 30 are engaged with teeth 22 of drive member 20, allowing the drive member 20 to rotate in either of clockwise and counterclockwise directions to drive a fastener in the same direction. Free rotation of drive member 20 in a reverse direction without driving the fastener is not allowed. Namely, rotation of drive member 20 in a reverse direction drives the fastener in the reverse direction.
  • first outer corner 48 of control member 40 engages with and moves coupling portion 32 of first pawl 30.
  • first pawl 30 is moved away from drive member 20.
  • teeth 31 of first pawl 30 are disengaged from teeth 22 of drive member 20.
  • Teeth 31 of second pawl 30 are still engaged with teeth 22 of drive member 20, for second outer corner 48 moves away from coupling portion 32 of second pawl 30 in a direction without actuating coupling portion 32 of second pawl 30.
  • Positioning member 172 is received in first positioning hole 43 of control member 40. In this state, drive member 20 can rotate in the clockwise direction to drive the fastener in the clockwise direction. Furthermore, drive member 20 can rotate freely in the counterclockwise direction without driving the fastener.
  • first and second lines L 1 and L 2 are not greater than 100° and since first and second outer corners 48 are in contact with coupling portions 32 of first and second pawls 30, idle travel during movement of control member 40 between the first, second, and third operative positions is minimized. Furthermore, switching of control member 40 between the first, second, and third operative positions can be rapidly achieved through small angular travel of control member 40. Further, the ratchet wrench according to the preferred teachings of the present invention can be utilized to perform slight tightness adjustment of the fastener when control member 40 is in the second operative position.
  • control member 40 can include a frictional outer periphery to allow easy manual operation to pivot control member 40 between the first, second, and third operative positions.
  • Other arrangements allowing pivotal movement of control member 40 would be within the skill of the art.
  • Drive member 20 can be of other forms. In a modified example shown in FIG. 9 , drive member 20' also includes a plurality of teeth 22' and an annular groove 23' in an outer periphery thereof.
  • a retainer ring 24' in the form of a C-clip is mounted in annular groove 23' of drive member 20' and annular groove 131 of body 10 to allow rotation of drive member 20' in first compartment 13.
  • drive member 20' includes a drive section 21' outside of driving portion 11 of body 10.
  • Drive section 21' is in the form of a drive column having square cross sections.
  • Drive section 21' includes a spring-biased coupler 25' for releasable coupling with a socket.
  • drive member 20" also includes a plurality of teeth 22" and an annular groove 23" in an outer periphery thereof.
  • a retainer ring 24" in the form of a C-clip is mounted in annular groove 23" of drive member 20" and annular groove 131 of body 10 to allow rotation of drive member 20" in first compartment 13.
  • drive member 20" includes a drive section 21" outside of driving portion 11 of body 10.
  • Drive section 21" is in the form of a drive column having square cross sections.
  • Drive section 21" includes a spring-biased quick-release coupler 25" allowing releasable coupling with a socket.
  • Other forms of drive member 20, 20', 20" would be within the skill of the art.
  • driving portion 11 of body 10 can be of other forms without adversely affecting the function of rotatably receiving drive member 20, 20', 20", examples of which are shown in FIGS. 9 and 10 .
  • each of first and second pawls 30 can be omitted if desired, so that coupling portions 32 in the form of pegs are directly formed on top faces 37.
  • the pegs can have other forms including but not limited to square, rectangular, and irregular shapes.
  • each coupling portion 32 can have other forms such as a recess in an outer face of each of first and second pawls 30 opposite to inner face 36.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP08170202A 2008-06-19 2008-11-28 Clé à cliquet à trois positions fonctionnelles Withdrawn EP2135708A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW97122942A TW201000267A (en) 2008-06-19 2008-06-19 Three-way ratchet wrench

Publications (1)

Publication Number Publication Date
EP2135708A1 true EP2135708A1 (fr) 2009-12-23

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Family Applications (1)

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EP08170202A Withdrawn EP2135708A1 (fr) 2008-06-19 2008-11-28 Clé à cliquet à trois positions fonctionnelles

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EP (1) EP2135708A1 (fr)
TW (1) TW201000267A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010124216A3 (fr) * 2009-04-23 2011-03-31 Sroka John S Clé à rochet
CN112743480A (zh) * 2019-10-31 2021-05-04 襄阳中车电机技术有限公司 一种大型圆螺母锁紧装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201325824A (zh) * 2011-12-16 2013-07-01 Cheng-Pu Yang 棘輪扳手結構
TW201605580A (zh) * 2014-08-01 2016-02-16 yu-ting Hong 棘輪扳手結構
TWI500485B (zh) * 2014-10-30 2015-09-21 Infar Ind Co Ltd 棘輪扳手結構
US9709141B2 (en) * 2015-08-28 2017-07-18 Snap-On Incorporated Ratchet wrench and pawl mechanism

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20005280U1 (de) * 2000-03-20 2000-05-25 Hsieh Chih Ching Richtungssteuerungsanordnung eines Ratschenwerkzeuges
CA2282078A1 (fr) * 1999-09-10 2001-03-10 Jack Lee Outil a rochet
TW589241B (en) 2003-07-18 2004-06-01 Tai-Tzuo Chen Improved structure for ratchet wrench
US20040216564A1 (en) * 2003-05-02 2004-11-04 Terence Chen Reinforcement structure for wrench head
EP1484135A1 (fr) * 2003-06-05 2004-12-08 Hsiu-Ching Huang Clé à cliquet
US20050257650A1 (en) * 2004-05-19 2005-11-24 Bobby Hu Compact wrench with three-stage control

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2282078A1 (fr) * 1999-09-10 2001-03-10 Jack Lee Outil a rochet
DE20005280U1 (de) * 2000-03-20 2000-05-25 Hsieh Chih Ching Richtungssteuerungsanordnung eines Ratschenwerkzeuges
US20040216564A1 (en) * 2003-05-02 2004-11-04 Terence Chen Reinforcement structure for wrench head
EP1484135A1 (fr) * 2003-06-05 2004-12-08 Hsiu-Ching Huang Clé à cliquet
TW589241B (en) 2003-07-18 2004-06-01 Tai-Tzuo Chen Improved structure for ratchet wrench
US20050257650A1 (en) * 2004-05-19 2005-11-24 Bobby Hu Compact wrench with three-stage control

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010124216A3 (fr) * 2009-04-23 2011-03-31 Sroka John S Clé à rochet
US8495931B2 (en) 2009-04-23 2013-07-30 John S. Sroka Ratchet wrench
CN112743480A (zh) * 2019-10-31 2021-05-04 襄阳中车电机技术有限公司 一种大型圆螺母锁紧装置

Also Published As

Publication number Publication date
TW201000267A (en) 2010-01-01
TWI347246B (fr) 2011-08-21

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