EP2295202A1 - Wrench for providing two operative modes - Google Patents
Wrench for providing two operative modes Download PDFInfo
- Publication number
- EP2295202A1 EP2295202A1 EP09170366A EP09170366A EP2295202A1 EP 2295202 A1 EP2295202 A1 EP 2295202A1 EP 09170366 A EP09170366 A EP 09170366A EP 09170366 A EP09170366 A EP 09170366A EP 2295202 A1 EP2295202 A1 EP 2295202A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- toothed wheel
- head
- mandrel
- transmitting unit
- yoke
- 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
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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
- B25B13/467—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member which are gear-operated
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- 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
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- 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
- B25B13/48—Spanners; Wrenches for special purposes
- B25B13/481—Spanners; Wrenches for special purposes for operating in areas having limited access
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25G—HANDLES FOR HAND IMPLEMENTS
- B25G1/00—Handle constructions
- B25G1/06—Handle constructions reversible or adjustable for position
- B25G1/063—Handle constructions reversible or adjustable for position for screwdrivers, wrenches or spanners
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25G—HANDLES FOR HAND IMPLEMENTS
- B25G3/00—Attaching handles to the implements
- B25G3/38—Hinged, pivoted, swivelling, or folding joints
Definitions
- the present invention relates to a wrench for providing two operative modes for driving a fastener.
- a selective one-way wrench includes a handle, a head formed on the handle, a mandrel, a transmitting unit and a direction-selecting unit operable for selecting one of two directions in which the head drives the mandrel through the transmitting unit.
- the wrench can be used together with a socket to slack or tighten a fastener.
- the mandrel is inserted in an end of the socket while the fastener is inserted in an opposite end of the socket.
- the wrench is used to exert a large torque on the fastener initially. Once the fastener is slacked, it would be faster to drive the fastener with a bare hand than with the wrench.
- wrenches each including a handle, a head formed on the handle, a mandrel, a transmitting unit, a direction-selecting unit operable for selecting one of two directions in which the head drives the mandrel through the transmitting unit and a shaft connected to the transmitting unit.
- the handle At an initial stage of a slacking operation or a final stage of a tightening operation, the handle is operated to drive the mandrel through the transmitting unit.
- the shaft is operated to drive the mandrel through the transmitting unit.
- the present invention is therefore intended to obviate or at least alleviate the problems encountered in prior art.
- the wrench includes a handle, a yoke, a shaft, a head, a mandrel, a first transmitting unit and a second transmitting unit.
- the shaft includes a first section securely connected to the handle and a second section rotationally inserted in the yoke.
- the head is pivotally connected to the yoke.
- the mandrel is inserted through the head.
- the first transmitting unit can be used to transmit a small torque to the mandrel from the handle spun relative to the yoke.
- the second transmitting unit can be used together with the first transmitting unit to transmit a large torque to the mandrel from the handle pivoted together with the yoke.
- a two-mode wrench 100 includes a handle 10, a yoke 20, a head 30 pivotally connected to the yoke 20, a mandrel 40, a direction-selecting unit 50, a first transmitting unit, a second transmitting unit and a clutch 70 according to the preferred embodiment of the present invention.
- the wrench 100 is used with a socket to drive a fastener such as a nut and a screw.
- the mandrel 40 is inserted in a first cavity defined in the socket while the fastener is inserted in a second cavity defined in the socket.
- the direction-selecting unit 50 is operable to choose from two directions in which the wrench 100 rotates the fastener.
- the handle 10 is operated to drive the mandrel 40 via the first and second transmitting units.
- the handle 10 is operated to drive the mandrel 40 via the first transmitting unit only.
- the yoke 20 includes two branches 21 extended from two opposite sides thereof, a tunnel 22 defined therein and a chamber 23 defined in one of the branches 21.
- the chamber 23 is in communication with the tunnel 22.
- the head 30 is pivotally connected to the branches 21 with an axle 15 and a pin 24.
- the clutch 70 is located in the head 30 and will be described in detail later.
- the head 30 includes a space 32 centrally defined therein. There are grooves 33 longitudinally defined in the wall of the space 32 so that the grooves 33 are in communication with the space 32.
- a groove 34 is annularly defined in the wall of the space 32 so that the groove 34 is in communication with the space 32 and the grooves 33.
- Two apertures 31 are transversely defined in the head 30 so that the apertures 31 are in communication with the space 32.
- the axle 15 includes a first reduced end 16, a second reduced end 19 and a middle section 17 formed between the first reduced end 16 and the second reduced end 19.
- the first reduced end 16 of the axle 15 is inserted through the chamber 23 and connected to a plug 161.
- the middle section 17 of the axle 15 is inserted through one of the apertures 31 so that the second reduced end 19 of the axle 15 is located in the space 32.
- the middle section 17 of the axle 15 is formed with teeth 18.
- the teeth 18 are operatively connected to the clutch 70.
- the pin 24 includes an enlarged end, a reduced end 26 and a middle section 25 between the enlarged and reduced ends.
- the enlarged end of the pin 24 is a threaded portion engaged with a screw hole defined in the related branch 21 of the yoke 20.
- the middle section 25 of the pin 24 is inserted through the other aperture 31 so that the reduced end 26 of the pin 24 is located in the space 32.
- the periphery of the mandrel 40 is non-circular.
- the mandrel 40 includes a tunnel 44 axially defined therein and an aperture 48 transversely defined therein so that they are in communication with each other.
- the mandrel 40 includes a frame 43 formed thereon.
- a ball 41 includes a portion located in the tunnel 44 and another portion exposed to the exterior of the mandrel 40 through the aperture 48.
- the tunnel 44 includes a narrow lower section, a wide upper section and an annular shoulder between the lower and upper sections.
- a spring 45 is located in the upper section of the tunnel 44.
- a button 42 is formed on a rod 46.
- a recess 47 is defined in the rod 46. The rod 46 is inserted in the tunnel 44 so that it is in contact with the ball 41. The rod 46 is inserted through the spring 45. The spring 45 is compressed between the button 42 and the annular shoulder.
- a first portion of the ball 41 can be located in the recess 47 so that an opposite second portion of the ball 41 can be located in the aperture 48.
- the mandrel 40 can be inserted in the first cavity defined in the socket.
- the button 42 is lifted with the spring 45.
- the first portion of the ball 41 is abutted against the rod 46, thus keeping the second portion of the ball 41 exposed to the exterior of the mandrel 40.
- the second portion of the ball 41 is abutted against an internal side of the socket, thus keeping the socket connected to the mandrel 40.
- the nut or screw can be driven with the mandrel 40 through the socket.
- the direction-selecting unit 50 includes a knob 51, a pusher 56 and a ring 60.
- the knob 51 includes a cavity 52 defined in a side, an aperture 53 defined therein and wedges 54 formed on an opposite side.
- the pusher 56 includes wedges 57 formed on a side and legs 58 formed on an opposite side.
- the ring 60 includes an aperture 61 defined therein, two planar faces 62 formed thereon and two recesses 63 each defined in a related one of the planar faces 62.
- One of the apertures 61 receives the second reduced end 19 of the axle 15 while the other aperture 61 receives the reduced end 26 of the pin 24.
- the ring 60 is connected to the yoke 20.
- the pusher 56 is inserted through the aperture 61 of the ring 60.
- the knob 51 is located on the pusher 56 so that the wedges 54 of the knob 51 are engaged with the wedges 57 of the pusher 56.
- the pusher 56 is moved with the knob 51 when the knob 51 is rotated relative to the pusher 56.
- the first transmitting unit includes a shaft 11, a gear train 12 and toothed wheels 80 and 90.
- the shaft 11 includes a section securely inserted in the handle 10 and another section rotationally inserted in the tunnel 22 defined in the yoke 20.
- the gear train 12 is located in the chamber 23.
- the gear train 12 includes an active gear 13 and passive gears 14.
- the active gear 13 is securely connected to the shaft 11.
- a first one of the passive gears 14 is engaged with the active gear 13.
- a last one of the passive gears 14 is securely provided on the first reduced end 16 of the axle 15.
- the toothed wheel 80 includes teeth 81 formed on a side and ratchets 82 formed on an opposite side.
- the toothed wheel 80 includes an aperture 83 defined therein corresponding to the non-circular periphery of the mandrel 40 and four recesses 84 defined therein corresponding to the legs 58 of the pusher 56.
- the mandrel 40 is inserted through the aperture 83 so that the mandrel 40 and the toothed wheel 80 can only be rotated together.
- the legs 58 are inserted through the recesses 84.
- the teeth 81 of the toothed wheel 80 are engaged with the teeth 18 of the axle 15.
- the toothed wheel 90 includes an aperture 91 defined therein corresponding to the non-circular periphery of the mandrel 40 and ratchets 92 formed on a side.
- the mandrel 40 is inserted through the aperture 91 so that the mandrel 40 and the toothed wheel 90 can only be rotated together.
- the second transmitting unit includes a toothed wheel 85.
- the toothed wheel 85 includes ratchets 88 formed on a side, ratchets 89 formed on an opposite side, an aperture 94 defined therein, an annular flange 86 on the wall of the aperture 94 and blocks 87 formed on the periphery thereof.
- the mandrel 40 is inserted through the aperture 94.
- the blocks 87 are located in the grooves 33 so that the toothed wheel 85 can be moved but not rotated in the head 30.
- the ratchets 88 of the toothed wheel 85 can be engaged with the ratchets 82 of the toothed wheel 80.
- the ratchets 89 of the toothed wheel 85 can be engaged with the ratchets 92 of the toothed wheel 90.
- the clutch 70 includes a ring 71, springs 72 and 73 and a C-clip 74.
- the ring 71 and the spring 72 are located against each other and between the toothed wheels 80 and 85.
- the spring 72 is located in the aperture of the second ring 85 and abutted against the annular flange 86. Thus, the spring 72 is compressed between the toothed wheels 80 and 85.
- the spring 73 is compressed between the toothed wheels 85 and 90.
- a C-clip 74 is located in the groove 34 for retaining the clutch 70 within the head 30.
- the handle 10 is rotated relative to the yoke 20 so that the shaft 11 is rotated relative to the yoke 20.
- the shaft 11 rotates the toothed wheel 80 via the gear train 12.
- the toothed wheel 80 rotates the mandrel 40.
- the ratchets 82 of the toothed wheel 80 rattle on the ratchets 88 of the toothed wheel 85.
- the handle 10 and the yoke 20 are rotated together.
- the yoke 20 rotates the head 30.
- the head 30 rotates the toothed wheel 85.
- the toothed wheel 85 rotates the toothed wheel 80 because the ratchets 88 are engaged with the ratchets 82.
- the toothed wheel 80 rotates the mandrel 40.
- the knob 51 is rotated relative to the pusher 56.
- the knob 51 moves the pusher 56 downwards due to the engagement of the wedges 57 of the former with the wedges 54 of the latter.
- the pusher 56 pushes down the toothed wheel 85 due to the contact of the legs 58 of the pusher 56 with the annular flange 86 of the toothed wheel 85.
- the ratchets 88 of the toothed wheel 85 are disengaged from the ratchets 82 of the toothed wheel 80 while the ratchets 89 of the toothed wheel 85 are engaged with the ratchets 92 of the toothed wheel 90.
- the handle 10 and the yoke 20 are rotated together.
- the yoke 20 rotates the head 30.
- the head 30 rotates the toothed wheel 85.
- the toothed wheel 85 rotates the toothed wheel 90 for the engagement of the ratchets 89 with the ratchets 92.
- the toothed wheel 90 rotates the mandrel 40.
- the handle 10 is rotated relative to the yoke 20 so that the shaft 11 is rotated relative to the yoke 20.
- the shaft 11 rotates the toothed wheel 80 via the gear train 12.
- the toothed wheel 80 rotates the mandrel 40.
- the ratchets 92 of the toothed wheel 90 are locked with the ratchets 89 of the toothed wheel 85.
- the toothed wheel 90 cannot rotate clockwise relative to the toothed wheel 85. Therefore, the toothed wheel 90 cannot rotate the mandrel 40.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
Description
- The present invention relates to a wrench for providing two operative modes for driving a fastener.
- A selective one-way wrench includes a handle, a head formed on the handle, a mandrel, a transmitting unit and a direction-selecting unit operable for selecting one of two directions in which the head drives the mandrel through the transmitting unit.
- The wrench can be used together with a socket to slack or tighten a fastener. The mandrel is inserted in an end of the socket while the fastener is inserted in an opposite end of the socket.
- To slack the fastener, the wrench is used to exert a large torque on the fastener initially. Once the fastener is slacked, it would be faster to drive the fastener with a bare hand than with the wrench.
- To tighten the fastener, it would be faster to drive the fastener with a bare hand than with the wrench initially. At a final stage, the wrench is used to exert a large torque on the fastener.
- There are wrenches each including a handle, a head formed on the handle, a mandrel, a transmitting unit, a direction-selecting unit operable for selecting one of two directions in which the head drives the mandrel through the transmitting unit and a shaft connected to the transmitting unit. At an initial stage of a slacking operation or a final stage of a tightening operation, the handle is operated to drive the mandrel through the transmitting unit. For the rest of the slacking or tightening operation, the shaft is operated to drive the mandrel through the transmitting unit. Such wrenches can be found in
EP 0486710 ,US 454567 ,US 5105688 ,US 6070499 ,WO 8803999 WO 9207692 494828 - The present invention is therefore intended to obviate or at least alleviate the problems encountered in prior art.
- It is the primary objective of the present invention to provide a two-mode wrench with a head pivotally connected to a handle.
- To achieve the foregoing objective, the wrench includes a handle, a yoke, a shaft, a head, a mandrel, a first transmitting unit and a second transmitting unit. The shaft includes a first section securely connected to the handle and a second section rotationally inserted in the yoke. The head is pivotally connected to the yoke. The mandrel is inserted through the head. The first transmitting unit can be used to transmit a small torque to the mandrel from the handle spun relative to the yoke. The second transmitting unit can be used together with the first transmitting unit to transmit a large torque to the mandrel from the handle pivoted together with the yoke.
- Other objectives, advantages and features of the present invention will be apparent from the following description referring to the drawings.
- The present invention will be described via detailed illustration of the preferred embodiment referring to the drawings.
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Fig. 1 is a perspective view of a two-mode wrench according to the preferred embodiment of the present invention. -
Fig. 2 is a cross-sectional view of the wrench shown inFig. 1 . -
Fig. 3 is an enlarged, partial view of the wrench shown inFig. 2 . -
Fig. 4 is an enlarged, partial, cutaway view of the wrench shown inFig. 1 . -
Fig. 5 is a partial, exploded view of the wrench shown inFig. 1 . -
Fig. 6 is a perspective view of the wrench shown inFig. 5 . -
Fig. 7 is another enlarged, cross-sectional view of the wrench shown inFig. 1 . -
Fig. 8 is an enlarged, partial, cutaway view of the wrench shown inFig. 1 . -
Fig. 9 is an enlarged, partial, cutaway view of the wrench in another position than shown inFig. 8 . - Referring to
Figs. 1 through 7 , a two-mode wrench 100 includes ahandle 10, ayoke 20, ahead 30 pivotally connected to theyoke 20, amandrel 40, a direction-selectingunit 50, a first transmitting unit, a second transmitting unit and aclutch 70 according to the preferred embodiment of the present invention. Thewrench 100 is used with a socket to drive a fastener such as a nut and a screw. Themandrel 40 is inserted in a first cavity defined in the socket while the fastener is inserted in a second cavity defined in the socket. The direction-selectingunit 50 is operable to choose from two directions in which thewrench 100 rotates the fastener. At an initial stage of a slacking operation or a final stage of a tightening operation where a large torque is needed, thehandle 10 is operated to drive themandrel 40 via the first and second transmitting units. For the rest of the slacking or tightening operation, thehandle 10 is operated to drive themandrel 40 via the first transmitting unit only. - Referring to
Figs. 2 through 4 , theyoke 20 includes twobranches 21 extended from two opposite sides thereof, atunnel 22 defined therein and achamber 23 defined in one of thebranches 21. Thechamber 23 is in communication with thetunnel 22. Thehead 30 is pivotally connected to thebranches 21 with anaxle 15 and apin 24. Theclutch 70 is located in thehead 30 and will be described in detail later. - The
head 30 includes aspace 32 centrally defined therein. There aregrooves 33 longitudinally defined in the wall of thespace 32 so that thegrooves 33 are in communication with thespace 32. Agroove 34 is annularly defined in the wall of thespace 32 so that thegroove 34 is in communication with thespace 32 and thegrooves 33. Twoapertures 31 are transversely defined in thehead 30 so that theapertures 31 are in communication with thespace 32. - The
axle 15 includes a first reducedend 16, a second reducedend 19 and amiddle section 17 formed between the first reducedend 16 and the second reducedend 19. The first reducedend 16 of theaxle 15 is inserted through thechamber 23 and connected to aplug 161. Themiddle section 17 of theaxle 15 is inserted through one of theapertures 31 so that the second reducedend 19 of theaxle 15 is located in thespace 32. Themiddle section 17 of theaxle 15 is formed withteeth 18. Theteeth 18 are operatively connected to theclutch 70. - The
pin 24 includes an enlarged end, a reducedend 26 and amiddle section 25 between the enlarged and reduced ends. The enlarged end of thepin 24 is a threaded portion engaged with a screw hole defined in therelated branch 21 of theyoke 20. Themiddle section 25 of thepin 24 is inserted through theother aperture 31 so that the reducedend 26 of thepin 24 is located in thespace 32. - Referring to
Figs. 5 through 7 , the periphery of themandrel 40 is non-circular. Themandrel 40 includes atunnel 44 axially defined therein and anaperture 48 transversely defined therein so that they are in communication with each other. Themandrel 40 includes aframe 43 formed thereon. - A
ball 41 includes a portion located in thetunnel 44 and another portion exposed to the exterior of themandrel 40 through theaperture 48. Thetunnel 44 includes a narrow lower section, a wide upper section and an annular shoulder between the lower and upper sections. Aspring 45 is located in the upper section of thetunnel 44. Abutton 42 is formed on arod 46. Arecess 47 is defined in therod 46. Therod 46 is inserted in thetunnel 44 so that it is in contact with theball 41. Therod 46 is inserted through thespring 45. Thespring 45 is compressed between thebutton 42 and the annular shoulder. - When the
button 42 is pushed, a first portion of theball 41 can be located in therecess 47 so that an opposite second portion of theball 41 can be located in theaperture 48. Thus, themandrel 40 can be inserted in the first cavity defined in the socket. On being released, thebutton 42 is lifted with thespring 45. The first portion of theball 41 is abutted against therod 46, thus keeping the second portion of theball 41 exposed to the exterior of themandrel 40. The second portion of theball 41 is abutted against an internal side of the socket, thus keeping the socket connected to themandrel 40. Thus, the nut or screw can be driven with themandrel 40 through the socket. - The direction-selecting
unit 50 includes aknob 51, apusher 56 and aring 60. Theknob 51 includes acavity 52 defined in a side, anaperture 53 defined therein andwedges 54 formed on an opposite side. Thepusher 56 includeswedges 57 formed on a side andlegs 58 formed on an opposite side. Thering 60 includes anaperture 61 defined therein, twoplanar faces 62 formed thereon and tworecesses 63 each defined in a related one of the planar faces 62. - One of the
apertures 61 receives the secondreduced end 19 of theaxle 15 while theother aperture 61 receives the reducedend 26 of thepin 24. Thus, thering 60 is connected to theyoke 20. Thepusher 56 is inserted through theaperture 61 of thering 60. Theknob 51 is located on thepusher 56 so that thewedges 54 of theknob 51 are engaged with thewedges 57 of thepusher 56. Thus, thepusher 56 is moved with theknob 51 when theknob 51 is rotated relative to thepusher 56. - The first transmitting unit includes a
shaft 11, agear train 12 andtoothed wheels shaft 11 includes a section securely inserted in thehandle 10 and another section rotationally inserted in thetunnel 22 defined in theyoke 20. Thegear train 12 is located in thechamber 23. Thegear train 12 includes anactive gear 13 and passive gears 14. Theactive gear 13 is securely connected to theshaft 11. A first one of the passive gears 14 is engaged with theactive gear 13. A last one of the passive gears 14 is securely provided on the firstreduced end 16 of theaxle 15. Thus, when thehandle 10 is rotated relative to theyoke 20, theshaft 11 rotates theaxle 15 through thegear train 12. - The
toothed wheel 80 includesteeth 81 formed on a side and ratchets 82 formed on an opposite side. Thetoothed wheel 80 includes anaperture 83 defined therein corresponding to the non-circular periphery of themandrel 40 and fourrecesses 84 defined therein corresponding to thelegs 58 of thepusher 56. Themandrel 40 is inserted through theaperture 83 so that themandrel 40 and thetoothed wheel 80 can only be rotated together. Thelegs 58 are inserted through therecesses 84. Theteeth 81 of thetoothed wheel 80 are engaged with theteeth 18 of theaxle 15. - The
toothed wheel 90 includes anaperture 91 defined therein corresponding to the non-circular periphery of themandrel 40 and ratchets 92 formed on a side. Themandrel 40 is inserted through theaperture 91 so that themandrel 40 and thetoothed wheel 90 can only be rotated together. - The second transmitting unit includes a
toothed wheel 85. Thetoothed wheel 85 includesratchets 88 formed on a side, ratchets 89 formed on an opposite side, anaperture 94 defined therein, anannular flange 86 on the wall of theaperture 94 and blocks 87 formed on the periphery thereof. Themandrel 40 is inserted through theaperture 94. Theblocks 87 are located in thegrooves 33 so that thetoothed wheel 85 can be moved but not rotated in thehead 30. Theratchets 88 of thetoothed wheel 85 can be engaged with theratchets 82 of thetoothed wheel 80. Theratchets 89 of thetoothed wheel 85 can be engaged with theratchets 92 of thetoothed wheel 90. - The clutch 70 includes a
ring 71, springs 72 and 73 and a C-clip 74. Thering 71 and thespring 72 are located against each other and between thetoothed wheels spring 72 is located in the aperture of thesecond ring 85 and abutted against theannular flange 86. Thus, thespring 72 is compressed between thetoothed wheels spring 73 is compressed between thetoothed wheels clip 74 is located in thegroove 34 for retaining the clutch 70 within thehead 30. - Referring to
Figs. 6 and8 , to provide a small torque for driving the fastener clockwise, thehandle 10 is rotated relative to theyoke 20 so that theshaft 11 is rotated relative to theyoke 20. Theshaft 11 rotates thetoothed wheel 80 via thegear train 12. Thetoothed wheel 80 rotates themandrel 40. Theratchets 82 of thetoothed wheel 80 rattle on theratchets 88 of thetoothed wheel 85. - In any attempt to rotate the
toothed wheel 80 counterclockwise relative to thetoothed wheel 85, theratchets 82 are locked with theratchets 88. Thetoothed wheel 80 cannot rotate relative to thetoothed wheel 85. Therefore, thetoothed wheel 80 cannot rotate themandrel 40. - To provide a large torque for tightening the fastener, the
handle 10 and theyoke 20 are rotated together. Theyoke 20 rotates thehead 30. Thehead 30 rotates thetoothed wheel 85. Thetoothed wheel 85 rotates thetoothed wheel 80 because theratchets 88 are engaged with theratchets 82. Thetoothed wheel 80 rotates themandrel 40. - Referring to
Fig. 9 , to slack the fastener, theknob 51 is rotated relative to thepusher 56. Theknob 51 moves thepusher 56 downwards due to the engagement of thewedges 57 of the former with thewedges 54 of the latter. Thepusher 56 pushes down thetoothed wheel 85 due to the contact of thelegs 58 of thepusher 56 with theannular flange 86 of thetoothed wheel 85. Theratchets 88 of thetoothed wheel 85 are disengaged from theratchets 82 of thetoothed wheel 80 while theratchets 89 of thetoothed wheel 85 are engaged with theratchets 92 of thetoothed wheel 90. - To provide a large torque for slacking the fastener, the
handle 10 and theyoke 20 are rotated together. Theyoke 20 rotates thehead 30. Thehead 30 rotates thetoothed wheel 85. Thetoothed wheel 85 rotates thetoothed wheel 90 for the engagement of theratchets 89 with theratchets 92. Thetoothed wheel 90 rotates themandrel 40. - To provide a small torque for driving the fastener counterclockwise, the
handle 10 is rotated relative to theyoke 20 so that theshaft 11 is rotated relative to theyoke 20. Theshaft 11 rotates thetoothed wheel 80 via thegear train 12. Thetoothed wheel 80 rotates themandrel 40. - In any attempt to rotate the
toothed wheel 85 clockwise, theratchets 92 of thetoothed wheel 90 are locked with theratchets 89 of thetoothed wheel 85. Thetoothed wheel 90 cannot rotate clockwise relative to thetoothed wheel 85. Therefore, thetoothed wheel 90 cannot rotate themandrel 40. - The present invention has been described via the detailed illustration of the preferred embodiment. Those skilled in the art can derive variations from the preferred embodiment without departing from the scope of the present invention. Therefore, the preferred embodiment shall not limit the scope of the present invention defined in the claims.
Claims (11)
- A wrench comprising:a handle (10);a yoke (20);a shaft (11) comprising a first section securely connected to the handle and a second section rotationally inserted in the yoke (20);a head (30) pivotally connected to the yoke (20);a mandrel (40) inserted through the head (30);a first transmitting unit for transmitting a small torque to the mandrel (40) from the handle (10) spun relative to the yoke (20); anda second transmitting unit in cooperation with the first transmitting unit to transmit a large torque to the mandrel (40) from the handle (10) pivoted together with the yoke (20).
- The wrench according to claim 1 comprising:a pin (24) comprising a first end inserted in the yoke (20) and a second end inserted in the head (30); andan axle (15) comprising a first end inserted in the yoke (20) and a second end inserted in the head (30).
- The wrench according to claim 2, wherein the first transmitting unit comprises:a toothed wheel (80) securely provided around the mandrel (40) and engaged with the axle (15); anda gear train (12) comprising a first gear securely provided around the shaft and a last gear securely provided around the axle (15).
- The wrench according to claim 2, wherein the second transmitting unit comprises a toothed wheel (85) engaged with the toothed wheel (80) of the first transmitting unit and non-rotationally connected to the head (30).
- The wrench according to claim 4, wherein the head (30) comprises grooves (33) defined in an internal side, and the toothed wheel (85) of the second transmitting unit comprises blocks (87) located in the grooves (88) of the head.
- The wrench according to claim 2 comprising a direction-selecting unit (50) operable to choose from two directions in which the wrench rotates the fastener.
- The wrench according to claim 6, wherein the direction-selecting unit (50) comprises a toothed wheel movable between a first position and a second position in the head (30) and formed with a first group of ratchets on a side and a second group of ratchets on an opposite side, and the first transmitting unit comprises:a first toothed wheel (80) securely provided around the mandrel (40) and formed with a group of ratchets for engagement with the first group of ratchets of the toothed wheel of the direction-selecting unit in the first position;a second toothed wheel (90) securely provided around the mandrel (40) and formed with a group of ratchets for engagement with the second group of ratchets of the toothed wheel of the direction-selecting unit (50) in the second position; anda gear train (12) comprising a first gear securely provided around the shaft and a last gear securely provided around the axle (15).
- The wrench according to claim 7, wherein the direction-selecting unit (50) comprises:a knob (51) rotationally provided on the head (30) and formed with wedges (57) on a side; anda pusher (56) movably but non-rotationally located in the head (30) and formed with wedges (57) engaged with the wedges (57) of the knob (51) and legs (58) in contact with the toothed wheel of the direction-selecting unit.
- The wrench according to claim 8, comprising a clutch (70) in cooperation with the direction-selecting unit (50) for smoothly moving the toothed wheel of the direction-selecting unit between the first and second positions.
- The wrench according to claim 9, wherein the clutch (70) comprises:a first spring (72) compressed between the first toothed wheel (80) of the first transmitting unit and the toothed wheel of the direction-selecting unit (85); anda second spring (73) compressed between the second toothed wheel (90) of the first transmitting unit and the toothed wheel of the direction-selecting unit (85).
- The wrench according to claim 8, wherein the second transmitting unit comprises:grooves (33) defined in an internal side of the head (30); andblocks (87) formed on the toothed wheel (85) of the direction-selecting unit and movably located in the grooves (33).
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20090170366 EP2295202B1 (en) | 2009-09-15 | 2009-09-15 | Wrench for providing two operative modes |
ES09170366T ES2387651T3 (en) | 2009-09-15 | 2009-09-15 | Wrench to provide two operating modes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20090170366 EP2295202B1 (en) | 2009-09-15 | 2009-09-15 | Wrench for providing two operative modes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2295202A1 true EP2295202A1 (en) | 2011-03-16 |
EP2295202B1 EP2295202B1 (en) | 2012-05-23 |
Family
ID=41582223
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20090170366 Not-in-force EP2295202B1 (en) | 2009-09-15 | 2009-09-15 | Wrench for providing two operative modes |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2295202B1 (en) |
ES (1) | ES2387651T3 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2500138A1 (en) * | 2011-03-18 | 2012-09-19 | Pard Hardware Industrial Co., Ltd. | One-way wrench |
CN103101017A (en) * | 2012-12-13 | 2013-05-15 | 朱春梅 | Wrench |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4545267A (en) | 1984-03-05 | 1985-10-08 | Shumway Warren R | Combination gear ratchet wrench apparatus |
WO1988003999A1 (en) | 1986-11-24 | 1988-06-02 | Williams Thomas A | Reversible unidirectional transmission |
WO1992007692A1 (en) | 1990-10-29 | 1992-05-14 | Midland Design Inc. | Ratchet wrench with dual-rotating constant drive handle |
US6070499A (en) | 1994-12-24 | 2000-06-06 | Wisbey; James Harry | Ratchet wrench having two modes of reciprocating manual input |
US20050155468A1 (en) | 2004-01-16 | 2005-07-21 | Te-Chen Chu | Swing head structure of a wrench with two kinds of torque output |
US20060201288A1 (en) * | 2005-03-09 | 2006-09-14 | Chen Siou Y | Swing-type wrench |
-
2009
- 2009-09-15 EP EP20090170366 patent/EP2295202B1/en not_active Not-in-force
- 2009-09-15 ES ES09170366T patent/ES2387651T3/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4545267A (en) | 1984-03-05 | 1985-10-08 | Shumway Warren R | Combination gear ratchet wrench apparatus |
WO1988003999A1 (en) | 1986-11-24 | 1988-06-02 | Williams Thomas A | Reversible unidirectional transmission |
US5105688A (en) | 1986-11-24 | 1992-04-21 | Thomas A. Williams, III | Reversible unidirectional transmission |
EP0486710A1 (en) | 1986-11-24 | 1992-05-27 | WILLIAMS III, Thomas A. | Reversible unidirectional transmission |
WO1992007692A1 (en) | 1990-10-29 | 1992-05-14 | Midland Design Inc. | Ratchet wrench with dual-rotating constant drive handle |
US6070499A (en) | 1994-12-24 | 2000-06-06 | Wisbey; James Harry | Ratchet wrench having two modes of reciprocating manual input |
US20050155468A1 (en) | 2004-01-16 | 2005-07-21 | Te-Chen Chu | Swing head structure of a wrench with two kinds of torque output |
US20060201288A1 (en) * | 2005-03-09 | 2006-09-14 | Chen Siou Y | Swing-type wrench |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2500138A1 (en) * | 2011-03-18 | 2012-09-19 | Pard Hardware Industrial Co., Ltd. | One-way wrench |
CN103101017A (en) * | 2012-12-13 | 2013-05-15 | 朱春梅 | Wrench |
Also Published As
Publication number | Publication date |
---|---|
ES2387651T3 (en) | 2012-09-27 |
EP2295202B1 (en) | 2012-05-23 |
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