CN102773827A - screwdriver with torque limiter - Google Patents
screwdriver with torque limiter Download PDFInfo
- Publication number
- CN102773827A CN102773827A CN2012102431915A CN201210243191A CN102773827A CN 102773827 A CN102773827 A CN 102773827A CN 2012102431915 A CN2012102431915 A CN 2012102431915A CN 201210243191 A CN201210243191 A CN 201210243191A CN 102773827 A CN102773827 A CN 102773827A
- Authority
- CN
- China
- Prior art keywords
- handle
- screwdriver
- bar
- relatively rotating
- magnetic element
- 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
- 235000014676 Phragmites communis Nutrition 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 2
- 230000008878 coupling Effects 0.000 description 17
- 238000010168 coupling process Methods 0.000 description 17
- 238000005859 coupling reaction Methods 0.000 description 17
- 210000000515 tooth Anatomy 0.000 description 12
- 230000002349 favourable effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
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
-
- 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
- B25B15/00—Screwdrivers
- B25B15/02—Screwdrivers operated by rotating the handle
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The invention relates to a screwdriver (10, 10 ') having a handle (20) comprising a torque limiter and a shaft (30) which is inserted coaxially into the handle (20) and can be rotated relative to the handle (20) and is coupled thereto in a torque-locking manner by means of the torque limiter, wherein each relative rotation between the shaft (30) and the handle (20) by at least one defined angle represents a switching cycle, wherein the screwdriver (10, 10') has means for counting the switching cycles.
Description
Technical field
The present invention relates to a kind of screwdriver of the preamble according to claim 1 with torque limiter.
Background technology
Known have a handle and a screwdriver that inserts the bar in the handle coaxially that comprises torque limiter; This bar can rotate and connect with sealed (the drehmomentschl ü ssig) mode of torque through torque limiter with this handle with respect to handle, and wherein relatively rotating with each of at least one predetermined angular between bar and handle representes that all one switches and circulates.Screwdriver with torque limiter is favourable, so that can screw be tightened with predetermined power, this predetermined power guarantees to keep reliably being threaded on the one hand, and the overstress of getting rid of screw thread on the other hand.Therefore, bar can rotate in handle, so that can make torque limit mechanism throw off.When being delivered to torque on the bar when overstepping the extreme limit torque through coupling from handle, torque limit mechanism is disengaged and bar rotates at least one predetermined angular with respect to handle, and mechanism engages again up to torque limit.At this, torque limit mechanism is worn and torn.
Summary of the invention
Therefore the objective of the invention is to, further construct the screwdriver that this type of has torque limiter, so that more cosily use.
According to the present invention, this purpose realizes through a kind of screwdriver with characteristic of claim 1.
Favourable make of the present invention and improvement project provide in the dependent claims.
Screwdriver according to the present invention has the handle and the bar that inserts coaxially in the handle that comprise torque limiter; Said bar can connect with the sealed mode of torque through torque limiter with respect to the handle rotation and with this handle; Wherein relatively rotating with each of at least one predetermined angular between bar and handle representes that all switches a circulation; It is characterized in that said chasing tool is useful on the device that counting switches circulation.Can provide the information which type of wearing and tearing torque limit mechanism has stood to the user through being used to count the device that switches circulation, load is multiple thereby the user can understand screwdriver.
Be used to count the device that switches circulation and preferably can be configured to active or passive structural detail.
According to of the present invention a kind of especially preferred embodiment; Said device has a Hall element and at least one magnetic element; Wherein preferably, Hall element can not relatively rotate ground (anti-rotationally) be connected with handle and said at least one magnetic element can not be connected with bar with relatively rotating.Therefore, between Hall element and said at least one magnetic element, relatively rotate equally when between bar and handle, relatively rotating, make that can detect this through Hall element relatively rotates.
Particularly preferably, magnetic element is processed by magnetic plastics, this make simply a kind of and also cheaply manufacture become possibility.
Preferably, bar runs through a disk coaxially and this disk can not be connected with said bar with relatively rotating, and wherein, at least one magnetic element is arranged on this disk.Can magnetic element be installed with the compact structure mode on bar with method by this way.
According to of the present invention preferred embodiment a kind of, said device has reed contact and magnetic element, and wherein preferably, magnetic element can not be connected with bar with relatively rotating and reed contact can not be connected with handle with relatively rotating.
According to of the present invention preferred embodiment a kind of, said device has the cam disc and the button that have at least one lug boss, and wherein preferably, cam disc can not be connected with bar with relatively rotating and button can not be connected with handle with relatively rotating.
An executive component preferably is set between cam disc and button, and this makes the possibility that is set to of compactness in handle especially.
Said device preferably perhaps switches circulation by the piezoelectric element counting with optical mode, inductance mode, capacitive way.
According to of the present invention preferred embodiment a kind of, torque limiter has two by joint element, the connection element that preferably is engaged with each other by engaging tooth, and wherein, predetermined angular limits through the angular distance between two adjacent joint elements.
According to of the present invention a kind of especially preferred embodiment; The number of magnetic element or the number of lug boss equal the number of joint element; Perhaps become integer ratio with the number of joint element, so as by this way and method realize the directly related property between the switching period that relatively rotates with count between bar and the handle.
Description of drawings
Specify the present invention according to following accompanying drawing.In the accompanying drawing:
Fig. 1 illustrates the side view according to first embodiment of screwdriver of the present invention;
Fig. 2 illustrates the longitudinal section according to the screwdriver of Fig. 1;
Fig. 3 illustrates the perspective view according to the disk that has magnetic element of the screwdriver of Fig. 2;
Fig. 4 illustrates the side view of screwdriver according to another embodiment of the invention;
Fig. 5 illustrates the longitudinal section of edge by the line A-A of Fig. 4;
Fig. 6 illustrates the rearview according to the no end cap of the screwdriver of Fig. 4;
Fig. 7 illustrates the opposite side view according to the screwdriver of Fig. 4;
Fig. 8 illustrates the longitudinal section of edge according to the line B-B of the screwdriver of Fig. 7; And
Fig. 9 illustrates the perspective view according to the cam disc that has executive component and button of Fig. 8.
The specific embodiment
Fig. 1 to 3 illustrates first embodiment with screwdriver 10 of a handle 20, and a torque limit mechanism is integrated in this handle and a bar 30 inserts in this handle coaxially.Torque limit mechanism is not theme of the present invention and can constructs with different embodiment.Importantly, the coaxial coupling 78 of torque through torque limit mechanism that inserts in the handle 20 rotationally and be applied on the handle 20 of bar 30 is delivered on the bar 30.For example be configured to 88 pairs of couplings of helical spring stage clip 78 through one at this and load, this stage clip keeps coupling 78 to engage with axial compressive force.Coupling 78 has one first connection element 80 and one second connection element 84.At this, first connection element 80 can not be connected with bar 30 with relatively rotating, and second connection element 84 can not be connected with handle 20 with relatively rotating.At this, these two connection elements 80,84 for example can have the engaging tooth 82,86 of corresponding number, and these engaging tooths are engaged with each other when coupling 78 engages.If surpass predetermined limit value from handle 20 through the torque that coupling 78 is delivered on the bar 30, then coupling 78 power that overcomes stage clip 88 is come out from bonding station, makes handle 20 to rotate with respect to bar 30.For example engaging tooth 82,86 engages up to coupling 78 in slip over each other again.Replace engaging tooth 82,86, also can use differing formed joint element, for example based on the joint element of ball or analog.Regard the once rotation between bar 30 and handle 20 as a switching circulation with the possible angle of rotation of minimum; It is essential that the angle of rotation that this minimum is possible engages up to coupling 78 in the back of from the bonding station of coupling 78, coming out again, here for example is the angular distance between two adjacent engaging tooths 86 of two of the first connection element adjacent engaging tooths 82 or second connection element.
In the screwdriver shown in Fig. 1-3 10, said device has active structure element and disk 50 that has a plurality of magnetic elements 52 of Hall element 40 forms.Substitute Hall element 40, for example also can use reed contact as passive structural elements.Hall element 40 can not be connected with handle 20 with relatively rotating.Disk 50 can not be connected with bar 30 with relatively rotating and run through coaxially by it especially.The number of magnetic element 52 preferably equals the number of joint element, particularly equals the number of the engaging tooth 82,86 of coupling 78.For example coupling 78 can have first connection element 80 and second connection element 84 that has nine engaging tooths 86 that has nine engaging tooths 82.In this case, nine magnetic elements 52 (referring to Fig. 3) are set equally on disk 50.These magnetic elements are preferably processed by magnetic plastics.In addition, magnetic element 52 can be placed on the disk 50 and be fixed on this disk.Preferably, magnetic element 52 is with disk 50 Construction integrations and particularly processed by magnetic plastics.
A unshowned display is set on handle 20, on this display, can shows and switch period by the electronic evaluating device.The state that can on this display, show the battery that is used for Hall element 40 in addition if perhaps the torque of the torque limit mechanism of screwdriver 10 is constructed changeably, then shows the torque of adjusting.When surpassing the preset limit value of the torque of perhaps adjusting for the switching period or before battery is used up fully, can export corresponding alarm signal or alarm soon in case of necessity.
Another embodiment at a screwdriver 10 ' shown in Fig. 4-9.This screwdriver and different makes that are to be used to count the device that switches circulation basically at the embodiment of the screwdriver 10 shown in Fig. 1-3, and torque limit mechanism is substantially the same.Screwdriver 10 ' has the device that is used to count the switching circulation, and this is used to count the device that switches circulation and has a cam disc 70 and a button 60.Cam disc 70 can not be connected with bar 30 with relatively rotating, and button 60 can not be connected with handle 20 with relatively rotating.Cam disc 70 is provided with lug boss 72.Preferably, the number of lug boss 72 equals the number of the joint element of coupling 78.Especially, here cam disc 70 has ten lug bosses 72 (referring to Fig. 9).Between cam disc 70 and button 60, be arranged essentially parallel to bar 30 longitudinal axis be provided with an executive component 75, make button 60 can be radially within cam disc 70 and vertically with the setting of staggering of this cam disc so that realize the compact structure form.If cam disc 70 rotates under the situation that has relative motion between bar 30 and the handle 20, then executive component 75 tilts through lug boss 72 as follows, makes the terminal operation push-button 60 that deviates from lug boss 72 of executive component 75.Thereby the electronic evaluating device that is connected with button 60 counting is to the operation of button 60 and the switching period of counting coupling 78.This switches period or other can show on the display 90 in the handle 20 of screwdriver 10 for the important information of user.
Reference numerals list
10 screwdrivers, 25 72 lug bosses
10 ' screwdriver, 75 executive components
20 handles, 78 couplings
30 bars, 80 first connection elements
40 Hall elements, 82 engaging tooths
50 disks, 30 84 second connection elements
52 magnetic elements, 86 engaging tooths
60 buttons, 88 stage clips
70 cam discs, 90 displays
Claims (10)
1. screwdriver (10,10 '); Has a handle (20) and a bar (30) that inserts coaxially in the handle (20) that comprises torque limiter; Said bar can rotate and connect with the sealed mode of torque through torque limiter with this handle with respect to handle (20), and wherein, relatively rotating with each of at least one predetermined angular between bar (30) and handle (20) representes that all one switches and circulates; It is characterized in that
Said screwdriver (10,10 ') has the device that is used to count the switching circulation.
2. according to one of aforesaid right requirement described screwdriver, it is characterized in that,
Said device has a Hall element (40) and at least one magnetic element (52); Wherein preferably, said Hall element (40) can not be connected with handle (20) and said at least one magnetic element (52) can not be connected with bar (30) with relatively rotating with relatively rotating.
3. screwdriver according to claim 2 is characterized in that,
Said magnetic element (52) is processed by magnetic plastics.
4. according to the described screwdriver of one of claim 2 to 3, it is characterized in that,
Said bar (30) runs through a disk (50) coaxially and this disk can not be connected with said bar with relatively rotating, and at least one magnetic element (52) is arranged on the said disk (50).
5. according to one of aforesaid right requirement described screwdriver, it is characterized in that,
Said device has reed contact and magnetic element, and wherein preferably, this magnetic element can not be connected with said bar with relatively rotating and this reed contact can not be connected with said handle with relatively rotating.
6. according to one of aforesaid right requirement described screwdriver, it is characterized in that,
Said device has the cam disc (70) and the button (60) that have at least one lug boss (72); Wherein preferably, cam disc (70) can not be connected with said bar (30) and button (60) can not be connected with said handle (20) with relatively rotating with relatively rotating.
7. screwdriver according to claim 6 is characterized in that,
Between said cam disc (70) and said button (60), an executive component (75) is set.
8. according to one of aforesaid right requirement described screwdriver, it is characterized in that,
Said device perhaps switches circulation by the piezoelectric element counting with optical mode, inductance mode, capacitive way.
9. according to one of aforesaid right requirement described screwdriver, it is characterized in that,
Said torque limiter has two by joint element, the connection element (80,84) that preferably is engaged with each other by engaging tooth (82,86), and said predetermined angular limits through the angular distance between two adjacent joint elements.
10. screwdriver according to claim 9 is characterized in that,
The number of the number of said magnetic element (52) or said lug boss (72) equals the number of said joint element, perhaps becomes integer ratio each other with the number of said joint element.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011017061.8A DE102011017061B4 (en) | 2011-04-14 | 2011-04-14 | Screwdriver with torque limiter |
| DE102011017061.8 | 2011-04-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102773827A true CN102773827A (en) | 2012-11-14 |
| CN102773827B CN102773827B (en) | 2016-03-16 |
Family
ID=45841225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210243191.5A Active CN102773827B (en) | 2011-04-14 | 2012-04-13 | screwdriver with torque limiter |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2511048B1 (en) |
| CN (1) | CN102773827B (en) |
| DE (1) | DE102011017061B4 (en) |
| TW (1) | TWI501842B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106175907A (en) * | 2016-08-31 | 2016-12-07 | 天津正天医疗器械有限公司 | Attribute torque handle |
| CN106914849A (en) * | 2017-04-17 | 2017-07-04 | 南昌工程学院 | A kind of high accuracy screwdriver based on piezoelectric stack |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9931739B2 (en) | 2014-01-16 | 2018-04-03 | Milwaukee Electric Tool Corporation | Screwdriver |
| TWI649165B (en) * | 2014-01-17 | 2019-02-01 | 美商德派信迪思產品公司 | Torque limiting instrument |
| CN107825341B (en) * | 2014-09-30 | 2019-11-05 | 新沂市复兴玻璃制品有限公司 | A kind of torsion-adjustable bottle opener |
| USD769689S1 (en) | 2015-01-15 | 2016-10-25 | Milwaukee Electric Tool Corporation | Fastener driver |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE513457C2 (en) * | 1999-10-11 | 2000-09-18 | Kapman Ab | Torque limited screwdriver |
| CN1640625A (en) * | 2004-01-16 | 2005-07-20 | 金统立工业股份有限公司 | Torque wrench capable of counting and displaying |
| DE202005013648U1 (en) * | 2005-08-29 | 2006-03-02 | Wang, Chun-Fu | Screw driver with adjustable torque for screwing has torque regulating device, handle, case, back-up ring, bar, spring, nut whereby case is fastened in handle and back-up ring having frictionless parts is fastened in case |
| DE202007007759U1 (en) * | 2007-05-31 | 2007-08-02 | Chen, Chang-Ying, Ta Li | Screwdriver with coupling permitting adjustment of maximum torque transmitted, includes adjustably spring-loaded slipping ratchet mechanism |
| CN201244793Y (en) * | 2008-07-11 | 2009-05-27 | 延锋伟世通汽车电子有限公司 | Counter of electric screwdriver |
| US20090255385A1 (en) * | 2008-04-14 | 2009-10-15 | Chih-Ching Hsieh | Torque wrench with a counter |
| CN201483434U (en) * | 2009-06-19 | 2010-05-26 | 倪锦波 | Brushless electric screwdriver electromagnetic induction type automatic shutdown structure |
| CN201511332U (en) * | 2009-09-11 | 2010-06-23 | 倪锦波 | Novel electric screwdriver |
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| DE19737234B4 (en) * | 1997-08-27 | 2004-03-11 | Scintilla Ag | Tools, especially cordless screwdrivers |
| JPH1177555A (en) * | 1997-09-05 | 1999-03-23 | Teac Corp | Torque Wrench |
| US6640674B1 (en) * | 2002-05-21 | 2003-11-04 | Pilling Weck Incorporated | Screwdriver having a variable torque-limiting in-line drive |
| DE502004002463D1 (en) * | 2003-05-17 | 2007-02-08 | Werner Hermann Wera Werke | SCREWDRIVER WITH TORQUE LIMITATION |
| TWI250920B (en) * | 2004-01-09 | 2006-03-11 | King Tony Tools Co Ltd | Torque wrench having counter display |
| US7047849B2 (en) * | 2004-01-22 | 2006-05-23 | King Tony Tools Co., Ltd. | Wrench capable of counting the number of times its torque reaches set values |
| DE102005056264A1 (en) * | 2005-11-14 | 2007-05-16 | Fein C & E Gmbh | Screwdriver with speed control and method for speed control of a screwdriver |
| DE202007017694U1 (en) * | 2007-12-19 | 2008-02-28 | Shieh, Jeng Chiang, Dayia | Torque overload protection device |
| DE202008004840U1 (en) * | 2008-04-03 | 2008-06-26 | Hsieh, Chih-Ching, Fengyuan | The advanced design of the hand tool |
| DE202008006279U1 (en) * | 2008-05-06 | 2008-07-24 | Hsieh, Chih-Ching | Torque wrench with a counting device |
| DE102011004364A1 (en) * | 2011-02-18 | 2012-08-23 | Robert Bosch Gmbh | Hand tool, in particular cordless screwdriver |
-
2011
- 2011-04-14 DE DE102011017061.8A patent/DE102011017061B4/en not_active Expired - Fee Related
-
2012
- 2012-03-02 EP EP12157844.7A patent/EP2511048B1/en active Active
- 2012-04-12 TW TW101112974A patent/TWI501842B/en active
- 2012-04-13 CN CN201210243191.5A patent/CN102773827B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE513457C2 (en) * | 1999-10-11 | 2000-09-18 | Kapman Ab | Torque limited screwdriver |
| CN1640625A (en) * | 2004-01-16 | 2005-07-20 | 金统立工业股份有限公司 | Torque wrench capable of counting and displaying |
| DE202005013648U1 (en) * | 2005-08-29 | 2006-03-02 | Wang, Chun-Fu | Screw driver with adjustable torque for screwing has torque regulating device, handle, case, back-up ring, bar, spring, nut whereby case is fastened in handle and back-up ring having frictionless parts is fastened in case |
| DE202007007759U1 (en) * | 2007-05-31 | 2007-08-02 | Chen, Chang-Ying, Ta Li | Screwdriver with coupling permitting adjustment of maximum torque transmitted, includes adjustably spring-loaded slipping ratchet mechanism |
| US20090255385A1 (en) * | 2008-04-14 | 2009-10-15 | Chih-Ching Hsieh | Torque wrench with a counter |
| CN201244793Y (en) * | 2008-07-11 | 2009-05-27 | 延锋伟世通汽车电子有限公司 | Counter of electric screwdriver |
| CN201483434U (en) * | 2009-06-19 | 2010-05-26 | 倪锦波 | Brushless electric screwdriver electromagnetic induction type automatic shutdown structure |
| CN201511332U (en) * | 2009-09-11 | 2010-06-23 | 倪锦波 | Novel electric screwdriver |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106175907A (en) * | 2016-08-31 | 2016-12-07 | 天津正天医疗器械有限公司 | Attribute torque handle |
| CN106175907B (en) * | 2016-08-31 | 2020-10-20 | 天津正天医疗器械有限公司 | Counting type torsion handle |
| CN106914849A (en) * | 2017-04-17 | 2017-07-04 | 南昌工程学院 | A kind of high accuracy screwdriver based on piezoelectric stack |
| CN106914849B (en) * | 2017-04-17 | 2019-05-21 | 南昌工程学院 | A kind of high-precision screwdriver based on piezoelectric stack |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102011017061B4 (en) | 2015-12-31 |
| EP2511048B1 (en) | 2015-08-05 |
| DE102011017061A1 (en) | 2012-10-18 |
| TWI501842B (en) | 2015-10-01 |
| CN102773827B (en) | 2016-03-16 |
| EP2511048A1 (en) | 2012-10-17 |
| TW201244888A (en) | 2012-11-16 |
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