CN102773827B - screwdriver with torque limiter - Google Patents
screwdriver with torque limiter Download PDFInfo
- Publication number
- CN102773827B CN102773827B CN201210243191.5A CN201210243191A CN102773827B CN 102773827 B CN102773827 B CN 102773827B CN 201210243191 A CN201210243191 A CN 201210243191A CN 102773827 B CN102773827 B CN 102773827B
- Authority
- CN
- China
- Prior art keywords
- screwdriver
- handle
- bar
- rotatably
- torque limiter
- 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.)
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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
-
- 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 with torque limiter.
Background technology
Known have the screwdriver that a handle comprising torque limiter and insert the bar in handle coaxially, this bar can be rotated relative to handle and be connected in (drehmomentschl ü ssig) mode that torque is sealed by torque limiter with this handle, and relatively rotating with each of at least one predetermined angular wherein between bar and handle all represents that one switches and circulates.The screwdriver with torque limiter is favourable, screw can be tightened with predetermined power, this predetermined power ensures reliably to keep being threaded on the one hand, and gets rid of the overstress of screw thread on the other hand.Therefore, bar can rotate in handle, torque-limiting mechanism can be made to throw off.When overstepping the extreme limit torque by coupling from the torque that handle is delivered to bar, torque-limiting mechanism is disengaged and bar rotates at least one predetermined angular relative to handle, until torque-limiting mechanism is re-engaged.At this, torque-limiting mechanism is worn and torn.
Summary of the invention
Therefore the object of the invention is to, construct the screwdriver that this type of has torque limiter further, more cosily to use.
According to the present invention, this object is realized by a kind of screwdriver with feature as described below.
Screwdriver according to the present invention has handle and the bar inserted coaxially in handle that comprises torque limiter, described bar can be rotated relative to handle and be connected in the mode that torque is sealed by torque limiter with this handle, relatively rotating with each of at least one predetermined angular wherein between bar and handle all represents that switches a circulation, it is characterized in that, described chasing tool has for counting the device switching circulation.By providing to user the information which type of wearing and tearing torque-limiting mechanism has stood for counting the device switching circulation, thus user can to understand screwdriver load multiple.
Preferably active or passive structural detail can be configured to for counting the device switching circulation.
Favourable make of the present invention and improvement project provide as follows.
The particularly preferred embodiment of one according to the present invention, described device has a Hall element and at least one magnetic element, wherein preferably, Hall element not rotatably (anti-rotating ground) to be connected with handle and at least one magnetic element described is not connected with bar rotatably.Therefore, relatively rotate between Hall element and at least one magnetic element described equally when relatively rotating between bar and handle, make to detect this by Hall element and relatively rotate.
Particularly preferably, magnetic element is made up of magnetic plastics, and this makes a kind of manufacture that is simple and low cost become possibility.
Preferably, bar runs through a disk coaxially and this disk is not connected rotatably with described bar, and wherein, at least one magnetic element is arranged on this disk.On bar, magnetic element can be installed in compact structure mode with method by this way.
According to one of the present invention preferred embodiment, described device has reed contact and magnetic element, and wherein preferably, magnetic element is not connected with bar rotatably and reed contact is not connected with handle rotatably.
According to one of the present invention preferred embodiment, described device has a cam disc with at least one lug boss and a button, and wherein preferably, cam disc is not connected with bar rotatably and button is not connected with handle rotatably.
Between cam disc and button, preferably arrange an executive component, to make especially in handle compact is set to possibility for this.
Described device preferably to be optically, inductance mode, capacitive way or switch circulation by piezoelectric element counting.
According to one of the present invention preferred embodiment, torque limiter has two by joint element, preferably by the connection element that engaging tooth is engaged with each other, and wherein, predetermined angular is limited by the angular distance between two adjacent joint elements.
The particularly preferred embodiment of one according to the present invention, the number of magnetic element or the number of lug boss equal the number of joint element, or become integer ratio with the number of joint element, so as by this way and method realize between bar and handle between the switching period relatively rotating with count directly related property.
Accompanying drawing explanation
The present invention is described in detail according to accompanying drawing below.In accompanying drawing:
Fig. 1 illustrates the side view of the first embodiment according to screwdriver of the present invention;
Fig. 2 illustrates the longitudinal section of the screwdriver according to Fig. 1;
Fig. 3 illustrates the perspective view of the disk with magnetic element of the screwdriver according to Fig. 2;
Fig. 4 illustrates the side view of screwdriver according to another embodiment of the invention;
Fig. 5 illustrates along the longitudinal section by the line A-A of Fig. 4;
Fig. 6 illustrates the rearview of the end-cover-free of the screwdriver according to Fig. 4;
Fig. 7 illustrates the opposite side view of the screwdriver according to Fig. 4;
Fig. 8 illustrates along the longitudinal section according to the line B-B of the screwdriver of Fig. 7; And
Fig. 9 illustrates the perspective view of the cam disc with executive component and button according to Fig. 8.
Detailed description of the invention
Fig. 1 illustrates first embodiment with the screwdriver 10 of a handle 20 to 3, and a torque-limiting mechanism is integrated in this handle and a bar 30 inserts in this handle coaxially.Torque-limiting mechanism is not theme of the present invention and can constructs with different embodiments.Importantly, bar 30 coaxial to insert rotationally in handle 20 and be applied to the torque on handle 20 be delivered on bar 30 by a coupling 78 of torque-limiting mechanism.Such as be configured to helical spring stage clip 88 pairs of couplings 78 by one at this load, this stage clip keeps coupling 78 to engage with axial compressive force.Coupling 78 has first connection element 80 and second connection element 84.At this, the first connection element 80 is not connected with bar 30 rotatably, and the second connection element 84 is not connected with handle 20 rotatably.At this, these two connection elements 80,84 such as can have the engaging tooth 82,86 of corresponding number, and these engaging tooths are engaged with each other when coupling 78 engages.If exceed predetermined limit value from handle 20 by coupling 78 torque be delivered to bar 30, then coupling 78 overcomes the power of stage clip 88 from bonding station out, and handle 20 can be rotated relative to bar 30.Such as engaging tooth 82,86 is in slip over each other, until coupling 78 is re-engaged.Replace engaging tooth 82,86, also can use differing formed joint element, such as, based on the joint element of ball or analog.By between bar 30 and handle 20 with the once rotation of minimum possible angle of rotation regard as one switch circulation, this minimum possible angle of rotation in the bonding station from coupling 78 out after until it is required that coupling 78 is re-engaged, be such as here the angular distance between two of two of the first connection element adjacent engaging tooths 82 or the second connection element adjacent engaging tooths 86.
Screwdriver 10 has the device that counting switches circulation.Here active or passive structural detail can be configured to for counting the device switching circulation.
In the screwdriver 10 that Fig. 1-3 illustrates, described device has active structure element and the disk 50 with multiple magnetic element 52 of Hall element 40 form.Substitute Hall element 40, such as, reed contact also can be used as passive structural elements.Hall element 40 is not connected with handle 20 rotatably.Disk 50 is not connected with bar 30 rotatably and is 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.Such as coupling 78 can have first connection element 80 with nine engaging tooths 82 and second connection element 84 with nine engaging tooths 86.In this case, disk 50 arranges nine magnetic elements 52 (see Fig. 3) equally.These magnetic elements are preferably made up of magnetic plastics.In addition, magnetic element 52 can be placed on disk 50 and to be fixed on this disk.Preferably, magnetic element 52 and disk 50 Construction integration and be particularly made up of magnetic plastics.
Hall element 40 is particularly arranged in the mode that axle is parallel with the longitudinal axis of bar 30, and can distinguish in its surveyed area and be existence magnetic element 52 or the gap existed between two adjacent magnetic elements 52.At this, Hall element 40 is connected with electronic evaluating device, can count magnetic element 52 how many times pass through from Hall element 40 side by this electronic evaluating device.Also the switching circulation of coupling 78 can be counted by this way.For powering to Hall element 40 and electronic evaluating device, be provided with battery etc.
Handle 20 arranges a unshowned display, period can be switched by the display of electronic evaluating device on the display.The state of the battery for Hall element 40 can be shown in addition on such displays, if or the torque of the torque-limiting mechanism of screwdriver 10 construct changeably, then show the torque adjusted.If desired exceed for when switching the preset limit value of period or the torque adjusted or use up completely at battery not long ago can export corresponding alarm signal or alarm.
Another embodiment of a screwdriver 10 ' shown in Fig. 4-9.This screwdriver is for counting the make switching the device circulated from the different of embodiment of the screwdriver 10 illustrated in fig. 1-3 substantially, and torque-limiting mechanism is substantially the same.Screwdriver 10 ' has for counting the device switching circulation, and this is used for counting the device switching circulation and has a cam disc 70 and a button 60.Cam disc 70 is not connected with bar 30 rotatably, and button 60 is not connected with handle 20 rotatably.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 (see Fig. 9).Be provided with an executive component 75 between cam disc 70 and button 60, with being arranged essentially parallel to the longitudinal axis of bar 30, button 60 can being staggered with this cam disc radially within cam disc 70 and vertically and arrange, to realize compact structure form.If cam disc 70 is deposited and rotated in the case of a relative movement between bar 30 and handle 20, then executive component 75 is tilted as follows by lug boss 72, makes the end effector button 60 deviating from lug boss 72 of executive component 75.The electronic evaluating device be connected with button 60 counts the operation of button 60 and thus counts the switching period of coupling 78.This switching period or other can display on the display 90 in the handle 20 of screwdriver 10 for the important information of user.
Reference numerals list
10 screwdriver 72 lug bosses
10 ' screwdriver 75 executive component
20 handle 78 couplings
30 bar 80 first connection elements
40 Hall element 82 engaging tooths
50 disk 84 second connection elements
52 magnetic element 86 engaging tooths
60 button 88 stage clips
70 cam disc 90 displays
Claims (18)
1. screwdriver (10,10 '), there is handle (20) and a bar (30) inserted coaxially in handle (20) that one comprises torque limiter, described bar can be rotated relative to handle (20) and be connected in the mode that torque is sealed by torque limiter with this handle, wherein, relatively rotating with each of at least one predetermined angular between bar (30) and handle (20) all represents that switches a circulation, it is characterized in that
Described screwdriver (10,10 ') has for counting the device switching circulation.
2. screwdriver according to claim 1, is characterized in that,
Described device has a Hall element (40) and at least one magnetic element (52).
3. screwdriver according to claim 2, is characterized in that,
Described Hall element (40) is not connected with handle (20) rotatably and at least one magnetic element described (52) is not connected with bar (30) rotatably.
4. screwdriver according to claim 2, is characterized in that,
Described magnetic element (52) is made up of magnetic plastics.
5., according to the screwdriver one of claim 2 to 4 Suo Shu, it is characterized in that,
Described bar (30) runs through a disk (50) coaxially and this disk is not connected rotatably with described bar, and at least one magnetic element (52) is arranged on described disk (50).
6. screwdriver according to claim 1, is characterized in that,
Described device has reed contact and magnetic element.
7. screwdriver according to claim 6, is characterized in that,
Described magnetic element is not connected with described bar rotatably and described reed contact is not connected with described handle rotatably.
8. screwdriver according to claim 1, is characterized in that,
Described device has a cam disc with at least one lug boss (72) (70) and a button (60).
9. screwdriver according to claim 8, is characterized in that,
Cam disc (70) is not connected with described bar (30) rotatably and button (60) is not connected with described handle (20) rotatably.
10. screwdriver according to claim 8 or claim 9, is characterized in that,
An executive component (75) is set between described cam disc (70) and described button (60).
11., according to the screwdriver one of Claims 1-4 and 6 to 9 Suo Shu, is characterized in that,
Described device to be optically, inductance mode, capacitive way or by piezoelectric element counting switch circulation.
12. screwdrivers according to claim 1, is characterized in that,
Described torque limiter has two connection elements be engaged with each other by joint element (80,84), and described predetermined angular is limited by the angular distance between two adjacent joint elements.
13., according to the screwdriver one of claim 2 to 4 and 6 to 7 Suo Shu, is characterized in that,
Described torque limiter has two connection elements be engaged with each other by joint element (80,84), and described predetermined angular is limited by the angular distance between two adjacent joint elements.
14. screwdrivers according to claim 13, is characterized in that,
Described joint element is engaging tooth (82,86).
15. screwdrivers according to claim 13, is characterized in that,
The number of described magnetic element (52) equals the number of described joint element, or with the number of described joint element each other in integer ratio.
16. screwdrivers according to claim 8 or claim 9, is characterized in that,
Described torque limiter has two connection elements be engaged with each other by joint element (80,84), and described predetermined angular is limited by the angular distance between two adjacent joint elements.
17. screwdrivers according to claim 16, is characterized in that,
Described joint element is engaging tooth (82,86).
18. screwdrivers according to claim 16, is characterized in that,
The number of described lug boss (72) equals the number of described joint element, or with the number of described joint element each other in integer ratio.
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 CN102773827A (en) | 2012-11-14 |
| CN102773827B true 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) |
Families Citing this family (6)
| 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 |
| CN106175907B (en) * | 2016-08-31 | 2020-10-20 | 天津正天医疗器械有限公司 | Counting type torsion handle |
| CN106914849B (en) * | 2017-04-17 | 2019-05-21 | 南昌工程学院 | A kind of high-precision screwdriver based on piezoelectric stack |
Citations (7)
| 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 |
| 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 |
| US20090255385A1 (en) * | 2008-04-14 | 2009-10-15 | Chih-Ching Hsieh | Torque wrench with a counter |
| 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 (7)
| 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 |
| 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 |
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 |
| CN102773827A (en) | 2012-11-14 |
| EP2511048A1 (en) | 2012-10-17 |
| TW201244888A (en) | 2012-11-16 |
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