CN102729225B - Quick clamping mechanism - Google Patents
Quick clamping mechanism Download PDFInfo
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- CN102729225B CN102729225B CN201210240577.0A CN201210240577A CN102729225B CN 102729225 B CN102729225 B CN 102729225B CN 201210240577 A CN201210240577 A CN 201210240577A CN 102729225 B CN102729225 B CN 102729225B
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- fast clamp
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Abstract
The invention discloses a quick clamping mechanism. The quick clamping mechanism comprises an output shaft which is used for mounting a tool accessory and forms a locking slotted hole which passes through the internal wall of the output shaft, a locking component arranged in the locking slotted hole, a bushing block sleeved on the output shaft, and a first energy storing component acted on the bushing block; the quick clamping mechanism further comprises a moving component arranged in the locking slotted hole; and the moving component is in contact with the bushing block, and can exert radial component force and axial component force to the bushing block when the tool accessory is inserted. The quick clamping mechanism has the advantages of ingenuity in structure, convenience in achievement, and capability of effectively achieving the operation of clamping or unlocking a working accessory through one hand; and the quick clamping mechanism brings great convenience to a user for use.
Description
Technical field
The present invention is applicable to a kind of fast clamp mechanism.
Background technology
In rotation type electric tool, need often to change the working accessory with dimension or function according to concrete application, such as electric screwdriver needs to change for different screw specification to drape over one's shoulders head accordingly.In the electric tool of existing rotation class, because working accessory needs to rotate, usually use spherical realizes the locking to working accessory, the circumferencial direction of usual working accessory is provided with a circle lock slots, spherical is used for the chamber of steady job annex and coordinates with lock slots by invading hammer anvil and realize locking, existing for controlling spherical locking or unlocking clamping device, often need to use and use two hands to carry out work simultaneously, but, in the work process of reality, often can only vacate a hand to go to operate, so cause greatly inconvenience to operation.
Summary of the invention
For solving the deficiencies in the prior art, the object of the present invention is to provide a kind of fast clamp mechanism of one that can realize fast folder by one hand or unlock.
In order to realize above-mentioned target, the present invention adopts following technical scheme: a kind of fast clamp mechanism, comprise: for the output shaft of erecting tools annex, this output shaft is formed with the locking slotted eye running through its inwall, be arranged on the locking piece in described locking slotted eye, be sleeved on the lining on described output shaft, act on the first accumulation of energy part of described lining; Described fast clamp mechanism also comprises the movable part be arranged in described locking slotted eye, and described movable part contacts with described lining and has radial and axial component when described attachment inserts to this lining.
Aforesaid fast clamp mechanism, is characterized in that: described movable part and above-mentioned lining all can contact with locking piece and for driving or limiting above-mentioned locking piece position.
Aforesaid fast clamp mechanism, it is characterized in that: described working accessory is installed to output shaft and the position of locked part locking is primary importance, after described locking piece moves axially towards lining, the d/d position of working accessory is the second place, and described movable part is movable between the first position and the second position relative to lining.
Aforesaid fast clamp mechanism, is characterized in that, above-mentioned output shaft center is provided with the placed cavity of its installation end through and driving end.
Aforesaid fast clamp mechanism, is characterized in that, above-mentioned casing slip is socketed in the periphery of above-mentioned output shaft installation end, and above-mentioned first accumulation of energy part is arranged between above-mentioned lining and output shaft.
Aforesaid fast clamp mechanism, is characterized in that, is provided with the sliding pin for ejecting and the second accumulation of energy part for making it have the trend of ejecting in above-mentioned placed cavity.
Aforesaid fast clamp mechanism, is characterized in that, outer first packing ring be arranged with for blocking above-mentioned first accumulation of energy part one end of above-mentioned output shaft installation end, above-mentioned lining inwall is formed with the vertical wall for blocking the above-mentioned first accumulation of energy part other end.
Aforesaid fast clamp mechanism, is characterized in that, the installation end periphery of above-mentioned output shaft is also provided with the back-up ring for blocking above-mentioned first packing ring.
Aforesaid fast clamp mechanism, it is characterized in that, the outer race of above-mentioned output shaft is connected to the second packing ring for limiting above-mentioned locking piece and movable part position, and above-mentioned second packing ring is provided with the open slot for hold above-mentioned locking piece and movable part corresponding with above-mentioned locking slotted eye.
Aforesaid fast clamp mechanism, it is characterized in that, output shaft periphery comprises successively by installation end: for arrange above-mentioned back-up ring groove section, for arranging the socket section of above-mentioned second accumulation of energy part, the lock segments for the formation of above-mentioned locking slotted eye and for blocking above-mentioned second packing ring.
Aforesaid fast clamp mechanism, is characterized in that, above-mentioned lock segments is divided into the non-revolved body section and revolving body section that are formed with perforate plane, is formed with the arc-shaped step face for blocking above-mentioned second packing ring side between above-mentioned revolving body section and non-revolved body section.
Aforesaid fast clamp mechanism, it is characterized in that, in above-mentioned second packing ring, loop-shaped matches with above-mentioned non-revolved body section, outer ring is divided into cylindrical section and frustum of a cone section, cylindrical section is positioned at installation end side frustum of a cone section and is positioned at driving end side, and above-mentioned open slot is initial from above-mentioned frustum of a cone section side to be extended to cylindrical section but does not run through completely.
Aforesaid fast clamp mechanism, is characterized in that, sliding pin is divided into two sections that vary in size, and the wherein larger one section side being positioned at above-mentioned driving end and its center are provided with the semi-enclosed kingpin hole for holding above-mentioned second accumulation of energy part; Above-mentioned placed cavity inwall is formed and coordinates two sections for above-mentioned sliding pin.
Aforesaid fast clamp mechanism, it is characterized in that, the inwall of above-mentioned lining is formed: the compressing section invading above-mentioned placed cavity for oppressing above-mentioned locking piece, above-mentioned locking piece can be made to exit the section of loosening of above-mentioned placed cavity, be arranged on the changeover portion increased gradually to the section of loosening space between above-mentioned compressing section and the section of loosening and by compressing section.
Aforesaid fast clamp mechanism, is characterized in that, above-mentioned locking piece contacts with movable part and has axially and the component of radial power described movable part when described attachment inserts.
Aforesaid fast clamp mechanism, is characterized in that, above-mentioned movable part is that spheroid or be formed is respectively used to the special-shaped skewback with two crossing planes that tilt of above-mentioned locking piece and changeover portion contact internal walls, and above-mentioned locking piece is spheroid.
Aforesaid fast clamp mechanism, is characterized in that, above-mentioned second accumulation of energy part is helical spring or two magnetic blocks repelled mutually, and the first accumulation of energy part is helical spring or two magnetic blocks repelled mutually.
Usefulness of the present invention is: structure of the present invention is ingenious, when inserting screwdriver bit, does not need operation lining to complete, and by adding elastic mechanism wherein, and screwdriver bit can automatic spring, brings greatly easy-to-use to user.
Accompanying drawing explanation
Fig. 1 is the structural representation of a preferred embodiment of the present invention under working accessory inserts (or release) state;
Fig. 2 is structural representation in the clamp state embodiment illustrated in fig. 1;
Fig. 3 is the detonation configuration signal of section components embodiment illustrated in fig. 1;
Fig. 4 is the structural representation of hammer anvil in Fig. 3;
Fig. 5 is the structural representation of middle lining embodiment illustrated in fig. 1.
The implication of Reference numeral in figure:
1. working accessory, 2. back-up ring, 3. the first packing ring, 4. the first accumulation of energy part, 5. lining, 6. locking piece, 7. movable part, 8. the second packing ring, 9. hammer anvil, 10. sliding pin, 11. second accumulation of energy parts, 12. bearings, 13. rotating shafts, 14. locking slotted eyes, 15. vertical walls, 16. open slots, 17, arc-shaped step face, 18, the lock slots of working accessory; A. groove section, B. is socketed section, C. lock segments, and D. oppresses section, the E. section of loosening, F. changeover portion.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, namely for electric screwdriver, concrete introduction is done to the present invention.
Shown in Fig. 5, the fast clamp mechanism of one of the present invention mainly comprises: locking piece 6, movable part 7, hammer anvil 9, lining 5.
Wherein, locking piece 6 coordinates for forming with the lock slots 18 of working accessory 1, and as preferably, locking piece 6, in order to ensure structural strength, can adopt metal material to make.Hammer anvil 9 center is provided with placed cavity, the effect of placed cavity is plug-in mounting working accessory 1 and holds sliding pin 10, placed cavity can be designed to the through cavity in two ends or the cavity volume for one end open, hammer anvil 9 is the installation end of hammer anvil 9 for the left end shown in one end of plug-in mounting working accessory 1 and Fig. 1, hammer anvil 9 is driving end for forming the right-hand member shown in one end of transmission and Fig. 1 with drive disk assembly such as rotating shaft 13 grade, and driving end is also provided with bearing 12 as transmission mechanism and rotating shaft 13.Therefore, shown in seeing figures.1.and.2, the driving end of hammer anvil 9 is generally mounted in the internal body of electric tool, and installation end generally protrudes at engine body exterior, for receiving working accessory 1, lining 5 is arranged on the periphery of hammer anvil 9 from the side socket of hammer anvil 9 safe end.Enter placed cavity in order to locking piece 6 can be allowed thus coordinate with the lock slots 18 of working accessory 1, hammer anvil 9 is provided with at least one locking slotted eye 14, and locking slotted eye 14 is can hold locking piece 6 and movable part 7 and to make a part for locking piece 6 be advisable placed cavity from wherein exposing.
The direction relative sliding that lining 5 and hammer anvil 9 can insert along working accessory 1 or exit, lining 5, when relative sliding is in diverse location, or can loosens locking piece 6 and realizes the locking and unlocking by the change of its inner wall shape contact.As a kind of preferred version, with reference to shown in Fig. 5, the inwall of lining 5 is formed: the compressing section D entering placed cavity for oppressing locking piece 6, the section of the loosening E that locking piece 6 can be made thoroughly to loosen exit placed cavity, is arranged on the changeover portion F increased gradually to the section of loosening E space between compressing section D and the section of loosening E and by compressing section D.What need to illustrate is preferably rotary structure due to lining 5 itself, so changeover portion F is preferably the inwall of one section of taper, and the section of compressing D and the section of loosening E is two sections of straight walls.
With reference to Fig. 1, shown in Fig. 2 and Fig. 5, when lining 5 is in compressing section D aligning locking piece 6, because compressing section D wall internal diameter size is little, locking piece 6 is pressed into locking slotted eye 14, now, movable part 7 is also pressed into locking slotted eye 14 under the effect of changeover portion F wall, but the hole be communicated with placed cavity due to locking slotted eye 14 can only make locking piece 6 part expose, so movable part 7 is now also limited in locking slotted eye 14, this movable part 7 contacts with lining 5 and has radial and axial component when described working accessory 1 inserts to this lining 5, namely movable part 7 and above-mentioned lining 5 all can contact with locking piece 6 and for driving or limiting above-mentioned locking piece 6 position.The changeover portion F inwall of lining 5 contacts with movable part 7, blocking lining 5 makes it can not again to the driving end movement further of hammer anvil 9, namely the state shown in Fig. 2, this state is the state locking working accessory 1, so we arrange the first accumulation of energy part 4 between lining 5 and hammer anvil 9, make lining 5 in the absence of external forces, lining 5 remains that trend to the direction movement away from hammer anvil 9 installation end is to keep this kind of state, even if so when not having installment work annex 1, state now is also general holding state.The state of above-mentioned working accessory 1 can also be summarised as: described working accessory 1 is installed to output shaft and the position that locked part 6 locks is primary importance, after described locking piece 6 moves axially towards lining 5, the d/d position of working accessory 1 is the second place, and lining 5 is movable between the first position and the second position relatively for described movable part 7.
Preferably, movable part 7 can be spherical, and in order to coordinate with the inwall of locking piece 6 and changeover portion F better, movable part 7 is the special-shaped skewbacks with the contact surfaces that two are tilted to intersect as shown in Figure 1, Figure 2, shown in Fig. 3.In addition, in order to fix the first accumulation of energy part 4, outer first packing ring 3 be arranged with for blocking first accumulation of energy part 4 one end of hammer anvil 9 installation end, lining 5 inwall is formed with the vertical wall 15 for blocking first accumulation of energy part 4 other end, and the installation end periphery of hammer anvil 9 is also provided with the back-up ring 2 for blocking the first packing ring 3.As preferably, the first accumulation of energy part 4 can be as shown in Figure 1, Figure 2, the helical spring shown in Fig. 3, it is peripheral that it is socketed in hammer anvil 9, and vertical wall 15 and the first packing ring 3 are withstood in two ends; Certain about a kind of expansion, the first accumulation of energy part 4 also can be two magnetic blocks mutually repelled, and wherein fix with back-up ring 2 for one piece, another block is fixed on vertical wall 15, can realize same effect.
With reference to Fig. 1, shown in Fig. 2 and Fig. 5, when needing to deactivate annex 1 from the states thereof shown in Fig. 2, locking piece 6 and the enough space of movable part 7 must be supplied to, them are made suitably to exit locking slotted eye 14, locking piece 6 is no longer coordinated with the lock slots 18 of working accessory in placed cavity 1, the position of restriction working accessory 1, with reference to shown in Fig. 1, but under the effect of external force, lining 5 is made to overcome the effect of the first accumulation of energy part 4, move to installation end, the periphery of locking piece 6 and movable part 7 is made to be inwalls of changeover portion F and the section of loosening E, possesses the space exiting locking slotted eye 14, no matter be now carrying out insertion working accessory 1 or deactivating annex 1, the size that working accessory 1 is used for steady job annex 1 except other part and the placed cavity of lock slots 18 is suitable, so locking piece 6 can be pushed up by contact outside placed cavity, now, locking piece 6 is no longer subject to the restriction of oppressing section D, it can be made to exit placed cavity, realize the plug-in mounting of working accessory 1 and exit, realize in order to working accessory 1 can be made automatically exiting, sliding pin 10 is installed in placed cavity from the other end of hammer anvil 9, and be provided with the second accumulation of energy part 11 and can have the trend ejected to hammer anvil 9 installation end, as preferably, sliding pin 10 is divided into two sections that vary in size, the wherein larger one section side being positioned at driving end and its center are provided with the semi-enclosed kingpin hole for holding the second accumulation of energy part 11, placed cavity inwall is formed and coordinates two sections for sliding pin 10, such benefit is, better can fix the second accumulation of energy part 11, also prevent sliding pin 10 from being ejected by the installation end from hammer anvil 9 simultaneously, one end of second accumulation of energy part 11 can be fixedly connected with sliding pin 10, the other end can be fixed on such as rotating shaft 13 center rotating part, and the second accumulation of energy part 11 also can adopt the technical scheme similar with the first accumulation of energy part 4, adopts helical spring or two magnetic blocks mutually repelled.
With reference to shown in Fig. 3, as a kind of preferred version, in order to the position of locking piece 6 and movable part 7 better can be limited, the second packing ring 8, second packing ring 8 that the outer race of hammer anvil 9 is connected to for limiting locking piece 6 and movable part 7 position is provided with the open slot 16 for hold locking piece 6 and movable part 7 corresponding with locking slotted eye 14.In back-up ring 2, loop-shaped matches with non-revolved body section, outer ring is divided into cylindrical section and frustum of a cone section, and conical section is positioned at installation end side cylinder table section and is positioned at driving end side, and open slot 16 is initial from frustum of a cone section side to be extended to cylindrical section but does not run through completely.Second packing ring 8 limits the movement at hammer anvil 9 circumferencial direction of locking piece 6 and movable part 7 by open slot 16 1 aspect, even if make them still once can accurately fall into locking slotted eye 14 upper after exiting locking slotted eye 14, shown in seeing figures.1.and.2 in addition, open slot 16 is that movable part 7 provides an extreme position in the direction of insertion being parallel to working accessory 1, make its can not when lining 5 contact action again in Fig. 1 right side further mobile.It should be noted that, the cylindrical section of the second packing ring 8 and frustum of a cone section are that it also can adopt other shape with the inwall of lining 5, does not add repeat at this in order to suitable with the changeover portion F and the section of loosening E of lining 5.
With reference to shown in Fig. 3 and Fig. 4, in order to the parts such as back-up ring 2, first packing ring 3 can be fixed better, as a kind of preferred version, hammer anvil 9 periphery comprises successively by installation end: for arrange back-up ring 2 groove section A, for arrange the second accumulation of energy part 11 socket section B, for the formation of locking slotted eye 14 and lock segments C for blocking the second packing ring 8.Lock segments C is divided into the non-revolved body section and revolving body section that are formed with perforate plane, is formed with the arc-shaped step face 17 for blocking the second packing ring 8 side between revolving body section and non-revolved body section.Namely non-revolved body section is by the entirety forming revolving body section, the number of the locking slotted eye 14 arranged as required, in a circumferential direction, form with the plane cutting being parallel to the axis of revolving body section, owing to not being complete cutting, so define arch steps face 17 in cutting end, arch steps face 17 and the effect of plane gone out by cutting are to can be good at blocking and locate the second packing ring 8.
Above-described embodiment does not limit the present invention in any form, the technical scheme that the mode that all employings are equal to replacement or equivalent transformation obtains, and all drops in protection scope of the present invention.
Claims (17)
1. a fast clamp mechanism, comprising:
Working accessory,
For the output shaft of installment work annex, this output shaft is formed with the locking slotted eye running through its inwall;
Be arranged on the locking piece in described locking slotted eye;
Be sleeved on the lining on described output shaft;
It is characterized in that, also comprise: only act on the first accumulation of energy part between described output shaft and lining, two or more to be arranged in described locking slotted eye and the movable part be evenly distributed in described output shaft circumference, and described movable part contacts with described lining and has radial and axial component when described working accessory inserts to this lining.
2. fast clamp mechanism according to claim 1, is characterized in that: described movable part and above-mentioned lining all can contact with locking piece and for driving or limiting above-mentioned locking piece position.
3. fast clamp mechanism according to claim 2, it is characterized in that: described working accessory is installed to output shaft and the position of locked part locking is primary importance, after described locking piece moves axially towards lining, the d/d position of working accessory is the second place, and described movable part is movable between the first position and the second position relative to lining.
4. fast clamp mechanism according to claim 3, is characterized in that, above-mentioned output shaft center is provided with the placed cavity of its installation end through and driving end.
5. fast clamp mechanism according to claim 4, is characterized in that, above-mentioned casing slip is socketed in the periphery of above-mentioned output shaft installation end, and above-mentioned first accumulation of energy part is arranged between above-mentioned lining and output shaft.
6. fast clamp mechanism according to claim 5, is characterized in that, is provided with the sliding pin for ejecting and the second accumulation of energy part for making it have the trend of ejecting in above-mentioned placed cavity.
7. fast clamp mechanism according to claim 6, it is characterized in that, outer first packing ring be arranged with for blocking above-mentioned first accumulation of energy part one end of above-mentioned output shaft installation end, above-mentioned lining inwall is formed with the vertical wall for blocking the above-mentioned first accumulation of energy part other end.
8. fast clamp mechanism according to claim 7, is characterized in that, the installation end periphery of above-mentioned output shaft is also provided with the back-up ring for blocking above-mentioned first packing ring.
9. fast clamp mechanism according to claim 8, it is characterized in that, the outer race of above-mentioned output shaft is connected to the second packing ring for limiting above-mentioned locking piece and movable part position, and above-mentioned second packing ring is provided with the open slot for hold above-mentioned locking piece and movable part corresponding with above-mentioned locking slotted eye.
10. fast clamp mechanism according to claim 9, it is characterized in that, output shaft periphery comprises successively by installation end: for arrange above-mentioned back-up ring groove section, for arranging the socket section of above-mentioned second accumulation of energy part, the lock segments for the formation of above-mentioned locking slotted eye and for blocking above-mentioned second packing ring.
11. fast clamp mechanisms according to claim 10, it is characterized in that, above-mentioned lock segments is divided into the non-revolved body section and revolving body section that are formed with perforate plane, is formed with the arc-shaped step face for blocking above-mentioned second packing ring side between above-mentioned revolving body section and non-revolved body section.
12. fast clamp mechanisms according to claim 11, it is characterized in that, in above-mentioned second packing ring, loop-shaped matches with above-mentioned non-revolved body section, outer ring is divided into cylindrical section and frustum of a cone section, cylindrical section is positioned at installation end side frustum of a cone section and is positioned at driving end side, and above-mentioned open slot is initial from above-mentioned frustum of a cone section side to be extended to cylindrical section but does not run through completely.
13. fast clamp mechanisms according to claim 6, is characterized in that, sliding pin is divided into two sections that vary in size, and the wherein larger one section side being positioned at above-mentioned driving end and its center are provided with the semi-enclosed kingpin hole for holding above-mentioned second accumulation of energy part; Above-mentioned placed cavity inwall is formed and coordinates two sections for above-mentioned sliding pin.
14. fast clamp mechanisms according to claim 6 to 13 any one, it is characterized in that, the inwall of above-mentioned lining is formed: the compressing section invading above-mentioned placed cavity for oppressing above-mentioned locking piece, above-mentioned locking piece can be made to exit the section of loosening of above-mentioned placed cavity, be arranged on the changeover portion increased gradually to the section of loosening space between above-mentioned compressing section and the section of loosening and by compressing section.
15. fast clamp mechanisms according to claim 5 to 13 any one, is characterized in that, above-mentioned locking piece contacts with movable part and has axially and the component of radial power described movable part when described working accessory inserts.
16. fast clamp mechanisms according to claim 14, is characterized in that, above-mentioned movable part is that spheroid or be formed is respectively used to the special-shaped skewback with two crossing planes that tilt of above-mentioned locking piece and changeover portion contact internal walls, and above-mentioned locking piece is spheroid.
17. fast clamp mechanisms according to claim 16, is characterized in that, above-mentioned second accumulation of energy part is helical spring or two magnetic blocks repelled mutually, and the first accumulation of energy part is helical spring or two magnetic blocks repelled mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210240577.0A CN102729225B (en) | 2012-07-12 | 2012-07-12 | Quick clamping mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210240577.0A CN102729225B (en) | 2012-07-12 | 2012-07-12 | Quick clamping mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102729225A CN102729225A (en) | 2012-10-17 |
| CN102729225B true CN102729225B (en) | 2015-04-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210240577.0A Expired - Fee Related CN102729225B (en) | 2012-07-12 | 2012-07-12 | Quick clamping mechanism |
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| Country | Link |
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| CN (1) | CN102729225B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104227633B (en) * | 2013-06-06 | 2016-05-18 | 苏州宝时得电动工具有限公司 | Impact wrench |
| CN104275685B (en) * | 2013-07-03 | 2018-07-31 | 博世电动工具（中国）有限公司 | Cutter holding device and the hand held electric tool for including this cutter holding device |
| CN103878726B (en) * | 2014-03-27 | 2016-05-04 | 国家电网公司 | A kind of electric screwdriver head |
| CN105500296A (en) * | 2015-12-31 | 2016-04-20 | 宁波中旺工具有限公司 | Electric screw driver with vibration reduction separating piece |
| CN108237498B (en) * | 2016-12-27 | 2024-04-09 | 苏州宝时得电动工具有限公司 | Clamping head |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6457916B2 (en) * | 1999-11-15 | 2002-10-01 | Insty-Bit, Inc. | Locking quick-change chuck assembly |
| CN201613372U (en) * | 2009-12-29 | 2010-10-27 | 苏州宝时得电动工具有限公司 | Chuck and electric tool using same |
| JP2011218454A (en) * | 2010-04-05 | 2011-11-04 | Saburo Hayashi | Bit connecting tool made of synthetic resin |
| CN202702204U (en) * | 2012-07-12 | 2013-01-30 | 南京德朔实业有限公司 | Quick clamp mechanism |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10337470A1 (en) * | 2003-08-14 | 2005-03-17 | Atlas Copco Electric Tools Gmbh | Clamping device for hexagon bits |
-
2012
- 2012-07-12 CN CN201210240577.0A patent/CN102729225B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6457916B2 (en) * | 1999-11-15 | 2002-10-01 | Insty-Bit, Inc. | Locking quick-change chuck assembly |
| CN201613372U (en) * | 2009-12-29 | 2010-10-27 | 苏州宝时得电动工具有限公司 | Chuck and electric tool using same |
| JP2011218454A (en) * | 2010-04-05 | 2011-11-04 | Saburo Hayashi | Bit connecting tool made of synthetic resin |
| CN202702204U (en) * | 2012-07-12 | 2013-01-30 | 南京德朔实业有限公司 | Quick clamp mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102729225A (en) | 2012-10-17 |
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Granted publication date: 20150408 Termination date: 20170712 |