EP3441189A1 - Torque-adjusting apparatus - Google Patents
Torque-adjusting apparatus Download PDFInfo
- Publication number
- EP3441189A1 EP3441189A1 EP17185417.7A EP17185417A EP3441189A1 EP 3441189 A1 EP3441189 A1 EP 3441189A1 EP 17185417 A EP17185417 A EP 17185417A EP 3441189 A1 EP3441189 A1 EP 3441189A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- torque
- catch
- lever
- teeth
- slot
- 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
Links
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000009877 rendering Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
- B25B23/142—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
- B25B23/1422—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters
- B25B23/1427—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters by mechanical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
Definitions
- the present invention relates to a torque wrench and, more particularly, to a torque-adjusting apparatus for a torque wrench.
- a torque wrench or torque screwdriver includes a torque-adjusting apparatus operable to adjust a maximum value of torque to be delivered thereby.
- a conventional torque-adjusting apparatus includes a knob and a controlling ring.
- the knob includes teeth formed on the periphery.
- the controlling ring includes teeth formed on an internal face. The knob is not rotatable relative to the controlling ring when the teeth of the former are engaged with that of the latter.
- the knob is rotatable relative to the controlling ring to adjust the maximum value of torque when the former is moved axially relative to the latter to disengage the teeth of the former from that of the latter. Then, the knob is moved back to the original position relative to the controlling ring to engage the teeth of the former with that of the latter to render the knob non-rotatable relative to the controlling ring.
- the knob is equipped with a ball and a spring.
- the spring is inserted in the knob.
- the ball is at least partially inserted in the knob. A portion of the ball is pressed by the spring so that another portion of the ball tends to extend from the knob.
- the ball is pressed by the controlling ring when the knob is inserted in the controlling ring so that the ball is hindered by the ball.
- the ball could easily escape from the knob when the knob is moved from the controlling ring.
- the torque-adjusting apparatus could malfunction when this happens.
- Torque-adjusting apparatuses with the above-mentioned structure can be found in Taiwanese Patent Nos. M371616 and I541108 . However, there is always room for improvement.
- the present invention is therefore intended to obviate or at least alleviate the problems encountered in prior art.
- the torque-adjusting apparatus includes a body, a lever and a catch.
- the body includes a tunnel extending in an axial manner and a slot extending in a radial manner so that the tunnel is in communication with the slot.
- the catch is formed with teeth and movable between a withdrawn position to locate the teeth in the slot and an extended position to locate the teeth out of the slot.
- the lever includes a portion pivotally connected to the body and inserted in the tunnel.
- the lever further includes a rear end connected to the catch and movably inserted in the slot between a lower position to locate the catch in the withdrawn position and an upper position to locate the catch in the extended position.
- the torque tool further includes a handle, a rod and a sleeve.
- the handle is located around the body.
- the rod is rotationally inserted in the handle and adapted for adjusting a maximum value of torque to be delivered by the torque tool.
- the rod is inserted in and connected to the tubular portion so that they are rotatable together.
- the sleeve is non-rotationally inserted in the handle.
- the sleeve includes teeth on an internal face around the rod.
- the catch includes teeth engaged with the teeth of the sleeve to prevent rotation of the body relative to the handle when the catch is in the extended position. The teeth of the catch are disengaged from the teeth of the sleeve when the catch is in the withdrawn position.
- the torque-adjusting apparatus includes only one catch movable between the withdrawn position to allow the adjustment of the maximum value of torque and the extended position to prevent the adjustment of the maximum value of torque.
- the structure of the torque-adjusting apparatus is simple, and the cost is low.
- a torque tool 60 that includes a torque-adjusting apparatus according to the preferred embodiment of the present invention.
- the torque tool 60 is a torque wrench with a head (not shown) for engagement with a nut or a portion of a threaded bolt so that the torque tool 60 is operable to drive the nut or threaded bolt.
- the torque tool 60 can be a screwdriver or the like in another embodiment.
- the torque tool 60 includes a hollow handle 61, a rod 62, a sleeve 63 and a scale ring 65.
- the rod 62 is inserted in the handle 61 and supported on a bearing 71 that is also inserted in the handle 61.
- the sleeve 63 includes teeth 64 formed on an internal face thereof. The teeth 64 of the sleeve 63 are located around the rod 62 when the sleeve 63 is inserted in the handle 61 in a non-movable manner.
- the scale ring 65 is located on and around the sleeve 63 and inserted in the handle 61 so that the scale ring 65 is rotatable between the sleeve 63 and the handle 61.
- the scale ring 65 is observable through a window 68 made in the handle 61.
- a lens 69 is preferably inserted in the window 68 of the handle 61, thereby allowing observation of the scale ring 65 but preventing access to the scale ring 65.
- the scale ring 65 includes on an external face teeth 66 and a scale 67.
- the scale 67 includes numbers. At least one of the numbers can be observed through the window 68 to provide a reading of a maximum value of torque to be delivered by the torque tool 60.
- the other parts of the torque tool 60 can be found in Taiwanese Patent No. I541108 and hence will not be described. The following specification will be given to the torque-adjusting apparatus.
- the torque-adjusting apparatus is operable to adjust the maximum value of torque to be delivered by the torque tool 60.
- the torque-adjusting apparatus includes a hollow body 10, a catch 20, a lever 30, a ball 40, a spring 42, a knob 50 and a button 56.
- the body 10 includes two open ends.
- a tunnel 11 extends to one of the open ends of the body 10 from the other end of the same.
- the body 10 further includes a slot 12.
- the depth of the slot 12 extends along a radius of the body 10.
- the depth of the tunnel 11 extends along an axis of the body 10. Hence, the depth of the slot 12 extends perpendicular to that of the tunnel 11.
- the tunnel 11 is in communication with the slot 12.
- the body 10 includes, between the open ends, an extensive portion 13, a tubular portion 14, an annular flange 15 and a reduced flat portion 16.
- the extensive portion 13 is located at one of the open end of the body 10 while the tubular portion 14 is located at the other open end of the body 10.
- the annular flange 15 is located next to the flat portion 16.
- the flat portion 16 is located between the tubular portion 14 and the annular flange 15.
- the annular flange 15 is located between the flat portion 16 and the extensive portion 13.
- the flat portion 16 is made of thickness that is measured in a transverse sense of direction of the body 10 is smaller than the diameter of the extensive portion 13 of that of the tubular portion 14.
- the slot 12 is made in the flat portion 16. Two apertures 121 are made in the flat portion 16 so that both of the apertures 121 are in communication with the slot 12.
- the catch 20 includes teeth 21 formed on an upper face and an aperture 22 made in a central portion.
- the aperture 22 is aligned to the tunnel 11 when the catch 20 is inserted in the slot 12. Now, the catch 20 is retained in the flat portion 16 that extends around the slot 12.
- the catch 20 is movable along a diameter of the body 10 between a withdrawn position and an extended position. That is, the catch 20 is rectilinearly reciprocated relative to the body 10.
- the lever 30 includes a rear end 31, a front end 32 located opposite to the rear end 31, and a convex face 33 formed at the rear end 31.
- the rear end 31 of the lever 30 is inserted in the slot 12 via the tunnel 11.
- the rear end 31 of the lever 30 is further inserted in the aperture 22.
- a pivot 17 is inserted in a portion of the lever 30 through the extensive portion 13 of the body 10.
- the front end 32 of the lever 30 extends beyond the extensive portion 13 of the body 10.
- the lever 30 is connected to the body 10 via a pivot 17, thereby rendering the lever 30 pivotal in the body 10 like a pendulum.
- a pin 18 is inserted in the slot 12 via one of the apertures 121.
- the pin 18 includes a middle portion inserted in a portion of the lever 30 near the rear end 31 and two terminal sections inserted in the catch 20.
- the pin 18 is made with length smaller than the width of the slot 12 so that the pin 18 is entirely located out of the apertures 121.
- the catch 20, which is connected to the rear end 31 of the lever 30, is allowed to move relative to the body 10. That is, the lever 30 is allowed to pivot about the pivot 17 in the body 10 without any interference from the flat portion 16 or any other portion of the body 10.
- the knob 50 is a hollow element that includes an anti-skid external face to facilitate maneuver thereof.
- the knob 50 further includes an annular rib 53 formed on an internal face, thereby dividing the interior of the knob 50 into a front cavity 51 and a rear cavity 52.
- the front cavity 51 is in communication with the rear cavity 52 through an aperture in the annular rib 53.
- the knob 50 further includes teeth 54 formed on the internal face and apertures 55 made in the annular rib 53. Screws 44 are inserted in the annular flange 15 through the apertures 55, thereby connecting the body 10 to the knob 50.
- the button 56 includes an aperture 57.
- a screw 46 is inserted in the front end 32 of the lever 30 via the aperture 57 when the button 56 is inserted in the front cavity 51 of the knob 50 to connect the lever 30 to the button 56.
- the button 56 can be pivoted relative to the knob 50 like a switch.
- the body 10 is inserted in the handle 61, with the annular flange 15 placed against the sleeve 63.
- the tubular portion 14 of the body is located on and around a portion of the rod 62.
- a pin 70 is inserted in the rod 62 through an aperture 19 made in the tubular portion 14 of the body 10, thereby keeping the body 10 on the rod 62 and rendering the body 10 rotatable together with the rod 62.
- the spring 42 is inserted in a cavity (not numbered) made in a front end of the rod 62.
- the spring 42 is compressed between the front end of the rod 62 and the ball 40.
- the ball 40 is pushed by the rear end 31 of the lever 30.
- the convex face 33 includes a central portion that extends longer than peripheral portions. The ball 40 tends to keep the lever 30 in a position when the ball 40 is abutted against a peripheral portion of the convex face 33.
- the button 46 which is connected to the lever 30, is kept in a position relative to the body 10.
- the catch 20 is in the extended position.
- the catch 20 is in an upper position while the button 56 is in a lower position since they are connected to each other via the lever 30.
- a portion of the catch 20 is located out of the slot 12 of the body 10. Accordingly, the teeth 21 are in an upper position relative to the body 10, thereby engaging the teeth 21 with the teeth 64 of the sleeve 63.
- the sleeve 63 is not movable so that the body 10 and the knob 50 are movable.
- the knob 50 cannot be maneuvered by mistake even if the torque tool 60 is used to loosen or tighten a nut or a threaded bolt. That is, the maximum value of torque delivered by the torque tool 60 cannot be adjusted by mistake.
- the catch 20 is in the withdrawn position.
- the catch 20 is in a lower position while the button 56 is in an upper position.
- the catch 20 is substantially inserted in the slot 12 of the body 10. Accordingly, the teeth 21 are in a lower position relative to the body 10, thereby disengaging the teeth 21 from the teeth 64 of the sleeve 63.
- the knob 50 is rotatable relative to the handle 61.
- the rod 62 is rotatable by the knob 50 via the body 10 because the annular rib 53 of the knob 50 is connected to the annular flange 15 of the body 10 and the rod 62 is connected to the tubular portion 14 of the body 10.
- the maximum value of torque delivered by the torque tool 60 can be adjusted by rotating the knob 50.
- the scale ring 65 is partially inserted in the rear cavity 52 of the knob 50, allowing engagement of the teeth 66 with the teeth 54. Hence, the scale ring 65 is rotatable together with the knob 50.
- the scale 67 of the scale ring 65 is observable via the lens 69 fitted in the window 68 ( FIG. 4 ), and a reading of the maximum value of torque to be delivered by the torque tool 60 is easily obtainable.
- the button 56 can be moved downward to bring the catch 20 to the extended position from the withdrawn position again.
- the maximum value of torque to be delivered by the torque tool 60 is hence retained again.
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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 torque wrench and, more particularly, to a torque-adjusting apparatus for a torque wrench.
- There are various torque tools such as torque wrenches and torque screwdrivers. A torque wrench or torque screwdriver includes a torque-adjusting apparatus operable to adjust a maximum value of torque to be delivered thereby.
- There are various conventional torque-adjusting apparatuses. A conventional torque-adjusting apparatus includes a knob and a controlling ring. The knob includes teeth formed on the periphery. The controlling ring includes teeth formed on an internal face. The knob is not rotatable relative to the controlling ring when the teeth of the former are engaged with that of the latter.
- The knob is rotatable relative to the controlling ring to adjust the maximum value of torque when the former is moved axially relative to the latter to disengage the teeth of the former from that of the latter. Then, the knob is moved back to the original position relative to the controlling ring to engage the teeth of the former with that of the latter to render the knob non-rotatable relative to the controlling ring.
- The knob is equipped with a ball and a spring. The spring is inserted in the knob. The ball is at least partially inserted in the knob. A portion of the ball is pressed by the spring so that another portion of the ball tends to extend from the knob. The ball is pressed by the controlling ring when the knob is inserted in the controlling ring so that the ball is hindered by the ball. However, the ball could easily escape from the knob when the knob is moved from the controlling ring. The torque-adjusting apparatus could malfunction when this happens.
- Torque-adjusting apparatuses with the above-mentioned structure can be found in Taiwanese Patent Nos.
M371616 I541108 - 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 relatively efficient, simple and inexpensive torque-adjusting apparatus.
- To achieve the foregoing objective, the torque-adjusting apparatus includes a body, a lever and a catch. The body includes a tunnel extending in an axial manner and a slot extending in a radial manner so that the tunnel is in communication with the slot. The catch is formed with teeth and movable between a withdrawn position to locate the teeth in the slot and an extended position to locate the teeth out of the slot. The lever includes a portion pivotally connected to the body and inserted in the tunnel. The lever further includes a rear end connected to the catch and movably inserted in the slot between a lower position to locate the catch in the withdrawn position and an upper position to locate the catch in the extended position.
- The torque tool further includes a handle, a rod and a sleeve. The handle is located around the body. The rod is rotationally inserted in the handle and adapted for adjusting a maximum value of torque to be delivered by the torque tool. The rod is inserted in and connected to the tubular portion so that they are rotatable together. The sleeve is non-rotationally inserted in the handle. The sleeve includes teeth on an internal face around the rod. The catch includes teeth engaged with the teeth of the sleeve to prevent rotation of the body relative to the handle when the catch is in the extended position. The teeth of the catch are disengaged from the teeth of the sleeve when the catch is in the withdrawn position.
- Advantageously, the torque-adjusting apparatus includes only one catch movable between the withdrawn position to allow the adjustment of the maximum value of torque and the extended position to prevent the adjustment of the maximum value of torque. Hence, the structure of the torque-adjusting apparatus is simple, and the cost is low.
- Other objectives, advantages and features of the present invention will be apparent from the following description referring to the attached drawings.
- The present invention will be described via detailed illustration of the preferred embodiment referring to the drawings wherein:
-
FIG. 1 is an exploded view of a torque tool including a torque-adjusting apparatus according to the preferred embodiment of the present invention; -
FIG. 2 is a side view of the torque-adjusting apparatus shown inFIG. 1 ; -
FIG. 3 is a cross-sectional view of the torque-adjusting apparatus taken along a line A-A shown inFIG. 2 ; -
FIG. 4 is an enlarged exploded view of the torque-adjusting apparatus shown inFIG. 1 ; -
FIG. 5 is another cross-sectional view of the torque-adjusting apparatus shown inFIG. 2 ; -
FIG. 6 is a cross-sectional view of the torque-adjusting apparatus taken along a line B-B shown inFIG. 2 ; -
FIG. 7 is a cross-sectional view of the torque-adjusting apparatus taken along a line C-C shown inFIG. 2 ; -
FIG. 8 is a cross-sectional view of the torque-adjusting apparatus in another position than shown inFIG. 5 ; and -
FIG. 9 is a cross-sectional view of the torque-adjusting apparatus taken along a line D-D shown inFIG. 8 . - Partially shown in
FIG. 1 is atorque tool 60 that includes a torque-adjusting apparatus according to the preferred embodiment of the present invention. For example, thetorque tool 60 is a torque wrench with a head (not shown) for engagement with a nut or a portion of a threaded bolt so that thetorque tool 60 is operable to drive the nut or threaded bolt. Thetorque tool 60 can be a screwdriver or the like in another embodiment. - Referring to
FIGS. 1 ,4 and5 , thetorque tool 60 includes ahollow handle 61, arod 62, asleeve 63 and ascale ring 65. Therod 62 is inserted in thehandle 61 and supported on abearing 71 that is also inserted in thehandle 61. Thus, therod 62 is kept rotatable in thehandle 61. Thesleeve 63 includesteeth 64 formed on an internal face thereof. Theteeth 64 of thesleeve 63 are located around therod 62 when thesleeve 63 is inserted in thehandle 61 in a non-movable manner. Thescale ring 65 is located on and around thesleeve 63 and inserted in thehandle 61 so that thescale ring 65 is rotatable between thesleeve 63 and thehandle 61. Thescale ring 65 is observable through awindow 68 made in thehandle 61. Alens 69 is preferably inserted in thewindow 68 of thehandle 61, thereby allowing observation of thescale ring 65 but preventing access to thescale ring 65. Thescale ring 65 includes on anexternal face teeth 66 and ascale 67. Thescale 67 includes numbers. At least one of the numbers can be observed through thewindow 68 to provide a reading of a maximum value of torque to be delivered by thetorque tool 60. - The other parts of the
torque tool 60 can be found in Taiwanese Patent No.I541108 - From
FIGS. 1 through 5 , it should easily be understood that the torque-adjusting apparatus is operable to adjust the maximum value of torque to be delivered by thetorque tool 60. The torque-adjusting apparatus includes ahollow body 10, acatch 20, alever 30, aball 40, aspring 42, aknob 50 and abutton 56. - The
body 10 includes two open ends. Atunnel 11 extends to one of the open ends of thebody 10 from the other end of the same. Thebody 10 further includes aslot 12. The depth of theslot 12 extends along a radius of thebody 10. The depth of thetunnel 11 extends along an axis of thebody 10. Hence, the depth of theslot 12 extends perpendicular to that of thetunnel 11. Thetunnel 11 is in communication with theslot 12. - On the outside, the
body 10 includes, between the open ends, anextensive portion 13, atubular portion 14, anannular flange 15 and a reducedflat portion 16. Theextensive portion 13 is located at one of the open end of thebody 10 while thetubular portion 14 is located at the other open end of thebody 10. Theannular flange 15 is located next to theflat portion 16. Theflat portion 16 is located between thetubular portion 14 and theannular flange 15. Theannular flange 15 is located between theflat portion 16 and theextensive portion 13. Theflat portion 16 is made of thickness that is measured in a transverse sense of direction of thebody 10 is smaller than the diameter of theextensive portion 13 of that of thetubular portion 14. Theslot 12 is made in theflat portion 16. Twoapertures 121 are made in theflat portion 16 so that both of theapertures 121 are in communication with theslot 12. - The
catch 20 includesteeth 21 formed on an upper face and anaperture 22 made in a central portion. Theaperture 22 is aligned to thetunnel 11 when thecatch 20 is inserted in theslot 12. Now, thecatch 20 is retained in theflat portion 16 that extends around theslot 12. Thecatch 20 is movable along a diameter of thebody 10 between a withdrawn position and an extended position. That is, thecatch 20 is rectilinearly reciprocated relative to thebody 10. - The
lever 30 includes arear end 31, afront end 32 located opposite to therear end 31, and aconvex face 33 formed at therear end 31. Therear end 31 of thelever 30 is inserted in theslot 12 via thetunnel 11. Therear end 31 of thelever 30 is further inserted in theaperture 22. Now, apivot 17 is inserted in a portion of thelever 30 through theextensive portion 13 of thebody 10. Thefront end 32 of thelever 30 extends beyond theextensive portion 13 of thebody 10. Thelever 30 is connected to thebody 10 via apivot 17, thereby rendering thelever 30 pivotal in thebody 10 like a pendulum. Moreover, apin 18 is inserted in theslot 12 via one of theapertures 121. Thepin 18 includes a middle portion inserted in a portion of thelever 30 near therear end 31 and two terminal sections inserted in thecatch 20. - Referring to
FIG. 7 , thepin 18 is made with length smaller than the width of theslot 12 so that thepin 18 is entirely located out of theapertures 121. Hence, thecatch 20, which is connected to therear end 31 of thelever 30, is allowed to move relative to thebody 10. That is, thelever 30 is allowed to pivot about thepivot 17 in thebody 10 without any interference from theflat portion 16 or any other portion of thebody 10. - The
knob 50 is a hollow element that includes an anti-skid external face to facilitate maneuver thereof. Theknob 50 further includes anannular rib 53 formed on an internal face, thereby dividing the interior of theknob 50 into afront cavity 51 and arear cavity 52. Thefront cavity 51 is in communication with therear cavity 52 through an aperture in theannular rib 53. Theknob 50 further includesteeth 54 formed on the internal face andapertures 55 made in theannular rib 53.Screws 44 are inserted in theannular flange 15 through theapertures 55, thereby connecting thebody 10 to theknob 50. - The
button 56 includes anaperture 57. Ascrew 46 is inserted in thefront end 32 of thelever 30 via theaperture 57 when thebutton 56 is inserted in thefront cavity 51 of theknob 50 to connect thelever 30 to thebutton 56. Hence, thebutton 56 can be pivoted relative to theknob 50 like a switch. - Referring to
FIGS. 5 through 7 , the connection of the torque-adjusting apparatus to thetorque tool 60 will be described. - The
body 10 is inserted in thehandle 61, with theannular flange 15 placed against thesleeve 63. Thetubular portion 14 of the body is located on and around a portion of therod 62. Apin 70 is inserted in therod 62 through anaperture 19 made in thetubular portion 14 of thebody 10, thereby keeping thebody 10 on therod 62 and rendering thebody 10 rotatable together with therod 62. - Moreover, the
spring 42 is inserted in a cavity (not numbered) made in a front end of therod 62. Thespring 42 is compressed between the front end of therod 62 and theball 40. Theball 40 is pushed by therear end 31 of thelever 30. Theconvex face 33 includes a central portion that extends longer than peripheral portions. Theball 40 tends to keep thelever 30 in a position when theball 40 is abutted against a peripheral portion of theconvex face 33. Hence, thebutton 46, which is connected to thelever 30, is kept in a position relative to thebody 10. - The
catch 20 is in the extended position. Thecatch 20 is in an upper position while thebutton 56 is in a lower position since they are connected to each other via thelever 30. A portion of thecatch 20 is located out of theslot 12 of thebody 10. Accordingly, theteeth 21 are in an upper position relative to thebody 10, thereby engaging theteeth 21 with theteeth 64 of thesleeve 63. - Now, the
sleeve 63 is not movable so that thebody 10 and theknob 50 are movable. Theknob 50 cannot be maneuvered by mistake even if thetorque tool 60 is used to loosen or tighten a nut or a threaded bolt. That is, the maximum value of torque delivered by thetorque tool 60 cannot be adjusted by mistake. - Referring to
FIGS. 8 and9 , thecatch 20 is in the withdrawn position. Thecatch 20 is in a lower position while thebutton 56 is in an upper position. Thecatch 20 is substantially inserted in theslot 12 of thebody 10. Accordingly, theteeth 21 are in a lower position relative to thebody 10, thereby disengaging theteeth 21 from theteeth 64 of thesleeve 63. - Now, the
knob 50 is rotatable relative to thehandle 61. Therod 62 is rotatable by theknob 50 via thebody 10 because theannular rib 53 of theknob 50 is connected to theannular flange 15 of thebody 10 and therod 62 is connected to thetubular portion 14 of thebody 10. Hence, the maximum value of torque delivered by thetorque tool 60 can be adjusted by rotating theknob 50. - Moreover, the
scale ring 65 is partially inserted in therear cavity 52 of theknob 50, allowing engagement of theteeth 66 with theteeth 54. Hence, thescale ring 65 is rotatable together with theknob 50. Thescale 67 of thescale ring 65 is observable via thelens 69 fitted in the window 68 (FIG. 4 ), and a reading of the maximum value of torque to be delivered by thetorque tool 60 is easily obtainable. - The
button 56 can be moved downward to bring thecatch 20 to the extended position from the withdrawn position again. The maximum value of torque to be delivered by thetorque tool 60 is hence retained again. - The present invention has been described via the 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 (9)
- A torque-adjusting apparatus comprising:a body (10) comprising a tunnel (11) extending in an axial manner and a slot (12) extending in a radial manner so that the tunnel (11) is in communication with the slot (12);a catch (20) formed with teeth (21) and movable between a withdrawn position to locate the teeth (21) in the slot (12) and an extended position to locate the teeth (21) out of the slot (12); anda lever (30) comprising:a portion pivotally connected to the body (10) and inserted in the tunnel (11); anda rear end (31) connected to the catch (20) and movably inserted in the slot (12) between a lower position to locate the catch (20) in the withdrawn position and an upper position to locate the catch (20) in the extended position.
- The torque-adjusting apparatus according to claim 1, wherein the tunnel (11) extends throughout the body (10).
- The torque-adjusting apparatus according to claim 2, wherein the body (10) further comprises:an extensive portion (13) near an end, wherein the lever (30) is pivotally connected to the extensive portion (13) as the rear end (31) is inserted in the slot (12);a tubular portion (14) near an opposite end;an annular flange (15) near the extensive portion (13), wherein the lever (30) is inserted in the annular flange (15) and the extensive portion (13); anda flat portion (16) between the annular flange (15) and the tubular portion (14), wherein the slot (12) is made in the flat portion (16).
- The torque-adjusting apparatus according to claim 3, further comprising a pivot (17) inserted in the extensive portion (13) of the body (10) and a portion of the lever (30) near a front end (32).
- The torque-adjusting apparatus according to claim 3, wherein the catch (20) comprises an aperture (22) for receiving the rear end (31) of the lever (30).
- The torque-adjusting apparatus according to claim 5, further comprising a pin (18) inserted in the catch (20) and a portion of the lever (30) near the rear end (31).
- A torque tool comprising the torque-adjusting apparatus according to claim 1, further comprising:a handle (61) located around the body (10);a rod (62) rotationally inserted in the handle (61), wherein the rod (62) is inserted in and connected to the tubular portion (14) so that they are rotatable together;a sleeve (63) non-rotationally inserted in the handle (61), wherein the sleeve (63) comprises teeth (64) formed on an internal face around the rod (62), wherein the catch (20) comprises teeth (21) engaged with the teeth (64) of the sleeve (63) to prevent rotation of the body (10) relative to the handle (61) when the catch (20) is in the extended position, wherein the teeth (21) of the catch (20) are disengaged from the teeth (64) of the sleeve (63) when the catch (20) is in the withdrawn position.
- The torque tool according to claim 7, wherein the torque-adjusting apparatus further comprises:a spring (42) abutted against the rod (62); anda ball (40) biased toward the rear end (31) of the lever (30) by the spring (42), thereby keeping the rear end (31) of the lever (30) in a selected one of the upper and lower positions.
- The torque tool according to claim 8, wherein the lever (30) comprises a convex face (33) at the rear end (31) thereof, wherein the ball (40) is located in a lower peripheral portion of the convex face (33) to keep the rear end (31) of the lever (30) in upper position, wherein the ball (40) is located in an upper peripheral portion of the convex face (33) to keep the rear end (31) of the lever (30) in the lower position.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL17185417T PL3441189T3 (en) | 2017-08-08 | 2017-08-08 | Torque-adjusting apparatus |
ES17185417T ES2797249T3 (en) | 2017-08-08 | 2017-08-08 | Torque regulation device |
EP17185417.7A EP3441189B1 (en) | 2017-08-08 | 2017-08-08 | Torque-adjusting apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17185417.7A EP3441189B1 (en) | 2017-08-08 | 2017-08-08 | Torque-adjusting apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3441189A1 true EP3441189A1 (en) | 2019-02-13 |
EP3441189B1 EP3441189B1 (en) | 2020-03-18 |
Family
ID=59569228
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17185417.7A Active EP3441189B1 (en) | 2017-08-08 | 2017-08-08 | Torque-adjusting apparatus |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3441189B1 (en) |
ES (1) | ES2797249T3 (en) |
PL (1) | PL3441189T3 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0697268A1 (en) * | 1994-08-16 | 1996-02-21 | Hazet-Werk Hermann Zerver GmbH & Co. KG | Device for the releasable connection of a handle being turnable for adjusting purposes |
TWM371616U (en) | 2009-06-10 | 2010-01-01 | Yi-Min Wu | Improved mechanism for adjusting torque of wrench |
EP2998071A1 (en) * | 2014-09-18 | 2016-03-23 | Matatakitoyo Tool Co., Ltd. | Wrench with a lockable torque-setting mechanism |
TWI541108B (en) | 2014-08-15 | 2016-07-11 | A torque adjusting device and a tool having the torque adjusting device | |
US20170057061A1 (en) * | 2015-09-01 | 2017-03-02 | Bobby Hu | Electric Ratchet Wrench |
-
2017
- 2017-08-08 PL PL17185417T patent/PL3441189T3/en unknown
- 2017-08-08 ES ES17185417T patent/ES2797249T3/en active Active
- 2017-08-08 EP EP17185417.7A patent/EP3441189B1/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0697268A1 (en) * | 1994-08-16 | 1996-02-21 | Hazet-Werk Hermann Zerver GmbH & Co. KG | Device for the releasable connection of a handle being turnable for adjusting purposes |
TWM371616U (en) | 2009-06-10 | 2010-01-01 | Yi-Min Wu | Improved mechanism for adjusting torque of wrench |
TWI541108B (en) | 2014-08-15 | 2016-07-11 | A torque adjusting device and a tool having the torque adjusting device | |
EP2998071A1 (en) * | 2014-09-18 | 2016-03-23 | Matatakitoyo Tool Co., Ltd. | Wrench with a lockable torque-setting mechanism |
US20170057061A1 (en) * | 2015-09-01 | 2017-03-02 | Bobby Hu | Electric Ratchet Wrench |
Also Published As
Publication number | Publication date |
---|---|
ES2797249T3 (en) | 2020-12-01 |
PL3441189T3 (en) | 2020-07-13 |
EP3441189B1 (en) | 2020-03-18 |
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