CN203863089U - Anti-loose drill chuck - Google Patents
Anti-loose drill chuck Download PDFInfo
- Publication number
- CN203863089U CN203863089U CN201420292635.9U CN201420292635U CN203863089U CN 203863089 U CN203863089 U CN 203863089U CN 201420292635 U CN201420292635 U CN 201420292635U CN 203863089 U CN203863089 U CN 203863089U
- Authority
- CN
- China
- Prior art keywords
- drill body
- drill
- screw
- protheca
- thread
- 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.)
- Expired - Fee Related
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- Drilling And Boring (AREA)
- Gripping On Spindles (AREA)
Abstract
The utility model relates to an anti-loose drill chuck. The anti-loose drill chuck comprises a drill body, a clamping jaw, a nut, a nut sleeve, a steel gasket, a bearing, a rear cover, an outer sleeve and a front sleeve. External threads are arranged on a cylinder at the front of the drill body, and an outer conical surface is arranged at the rear of the cylinder on the drill body; internal threads matched with the external threads of the drill body are arranged on the inner circumferential face of the front sleeve, the threads of the front sleeve and the threads of the drill body can be rotated, a plurality of elastic claws are arranged at the rear of the front sleeve, inner conical surfaces matched with the outer conical surface of the drill body are arranged on the inner sides of the elastic claws, and outer circumferential faces are arranged on the outer sides of the elastic claws. Through threaded transmission of the front sleeve and the drill body, the elastic claws of the front sleeve expand the inner side circumferential face of the outer sleeve along the outer conical surface of the drill body, so that the nut and the clamping claw are locked, and a drill bit is locked and will not loose. The anti-loose drill chuck is reasonable in structure, convenient to operate and use and capable of preventing the drill bit from loosing in the impacting process of an electric drill, thereby being an ideal anti-loose drill chuck.
Description
Technical field
The utility model relates to drilling attachment in a kind of hardware & tools and machine tool, specifically a kind of locking drill chuck matching with the working-spindle of electric drill or lathe.
Background technology
Existing drill chuck is generally made up of drill body, jaw, screw, nut sleeve, bearing, steel pad, bonnet, overcoat, three jaws are arranged on respectively in three decile inclined holes of drill body, screw is arranged in the screw groove of drill body, the screw thread of screw and jaw forms thread transmission, nut sleeve is fixedly connected with screw, nut sleeve is injection-moulded in overcoat, and bonnet is fixedly connected with drill body, and there are screwed hole or taper hole in drill body rear portion.While installing and using, the screwed hole at drill body rear portion or taper hole are connected with the power transmission shaft of power equipment, and power transmission shaft drives drill body to drive three-jaw and folded instrument synchronously to rotate while rotation.But in the time of impact shock, drill bit is easily loosening.
Summary of the invention
Technical problem to be solved in the utility model is to overcome above-mentioned the deficiencies in the prior art, provides a kind of rational in infrastructure, easy for operation, in the time of impact shock, can prevent the locking drill chuck that drill bit is loosening.
The technical scheme in the invention for solving the above technical problem is: a kind of locking drill chuck, it comprises drill body, jaw, screw, nut sleeve, steel pad, bearing, bonnet, overcoat, protheca, three jaws are arranged on respectively in three decile inclined holes of drill body, screw is arranged in the screw groove of drill body, the screw thread of screw and jaw forms thread transmission, nut sleeve is fixedly connected with screw, nut sleeve is injection-moulded in overcoat, bonnet is fixedly connected with drill body, it is characterized in that: the anterior cylinder of described drill body is provided with external screw thread, on drill body, cylindrical rear portion is provided with a male cone (strobilus masculinus), described protheca inner peripheral surface is provided with the internal thread coordinating with the external screw thread of drill body, and protheca rear portion is provided with several elastic claws, and described elastic claw inner side is provided with the male cone (strobilus masculinus) of drill body and coordinates inner conical surface, and elastic claw outside is provided with outer circumference surface, the inner side of described overcoat arranges the inner peripheral surface coordinating with the outer circumference surface on elastic claw.Screw protheca, under the gearing of drill body external screw thread, the elastic claw of protheca moves to large extreme direction along the male cone (strobilus masculinus) of drill body, elastic claw diametric(al) spreading, its outer circumference surface push generation frictional force relative to the inner peripheral surface putting outward, avoid overcoat to rotate because of operational vibration relative to drill body, cause becoming flexible.
Between described protheca rear elastic pawl, be axially arranged with groove.
On described elastic claw, the rear end of inner conical surface is provided with a boss.
The utility model utilizes the screw thread transmission of protheca and drill body, the elastic claw of protheca is along the inside circumference face of the male cone (strobilus masculinus) tensioner overcoat of drill body, reach the object of pinning screw and jaw, can make electric drill in impact process, prevent that drill bit from getting loose, do not return loosening thereby pin drill bit.Against existing technologies, the utility model is rational in infrastructure, easy for operation, in the time of impact shock, can prevent that drill bit is loosening.
Brief description of the drawings
Below in conjunction with accompanying drawing, the utility model is described further.
Fig. 1 is the utility model composition structural representation.
Fig. 2 is the utility model drill body structural representation.
Fig. 3 is the utility model protheca structural representation.
Fig. 4 is the utility model protheca top view.
Fig. 5 is the utility model jacket structure schematic diagram.
Label in figure is: 1. drill body, 2. protheca, 3. overcoat, 4. nut sleeve, 5. screw, 6. jaw, 7. bearing, 8. steel pad, 9. bonnet, 11. external screw threads, 12. male cone (strobilus masculinus)s, 21. internal threads, 22. elastic claws, 23. outer circumference surfaces, 24. grooves, 25. boss, 31. inner peripheral surfaces.
Detailed description of the invention
As can be seen from Figure 1, a kind of locking drill chuck, it comprises drill body 1, jaw 6, screw 5, nut sleeve 4, steel pad 8, bearing 7, bonnet 9, overcoat 3, protheca 2, three jaws 6 are arranged on respectively in three decile inclined holes of drill body 1, screw 4 is arranged in the screw groove of drill body 1, screw 5 forms thread transmission with the screw thread of jaw 6, nut sleeve 4 is fixedly connected with screw 5, overcoat 3 is fixedly connected with nut sleeve 4, steel pad 8 is fixed on drill body 1, bearing 7 is between steel pad 8 and screw 5, bonnet 9 is fixedly connected with drill body 1, there is screwed hole at drill body 1 rear portion, be connected with electric drill host output shaft, host output shaft drives drill body 1 to drive three jaws 6 and folded instrument synchronously to rotate while rotation.The relation of said structure and coupled parts is same as the prior art, belongs to prior art, and this does not describe in detail.
Feature of the present utility model is: the anterior cylinder of described drill body 1 is provided with external screw thread 11, and external screw thread 11 is sinistral external thread.On drill body, cylindrical rear portion is provided with a male cone (strobilus masculinus) 12, as shown in Figure 1 and Figure 2.Described protheca 2 inner peripheral surfaces are provided with the internal thread 21 coordinating with the external screw thread 11 of drill body, and internal thread 21 is levogyrate inner thread.Drill body 1 is connected with protheca 2 threaded engagement.Protheca rear portion is provided with several elastic claws 22, and described elastic claw 22 inner sides are provided with the male cone (strobilus masculinus) 12 of drill body and coordinate inner conical surface, and elastic claw 22 outsides are provided with outer circumference surface 23, between described protheca rear elastic pawl 22, are axially arranged with groove 24.It arranges for elastic claw 22 has elasticity.On described elastic claw 22, the rear end of inner conical surface is provided with a boss 25.To reduce mobile frictional force.As shown in Figure 3, Figure 4.The inner side of described overcoat 3 arranges the inner peripheral surface 31 coordinating with the outer circumference surface on elastic claw 22.As shown in Figure 5.Elastic claw 22 is plug-in type, and it can push overcoat, produces frictional force, avoids overcoat to rotate because of operational vibration relative to drill body.
When the utility model uses, to clamping direction rotating jacket 3, drive screw 5 to rotate, by screw thread transmission, jaw 6 clamps the instruments such as drill bit, now counter-rotate protheca 2, under 11 gearings of drill body external screw thread, the elastic claw 22 of protheca 2 moves to large extreme direction along the male cone (strobilus masculinus) 12 of drill body 1, elastic claw 22 diametric(al) spreadings, the extruding relative to inner peripheral surface 31 on overcoat 3 of the outer circumference surface 23 of the elastic claw 22 of protheca 2 produces frictional force, realizes and prevents that overcoat 3 from rotating because of operational vibration relative to drill body 1, cause becoming flexible, produce the drill bit hidden danger that comes off.In the time wanting to unclamp drill bit, be rotated in the forward protheca 2 with hand, protheca 2 moves to the small end of drill body male cone (strobilus masculinus) 12 relative to drill body 1, and elastic claw 22 diametric(al)s are shunk, and depart from the inner peripheral surface 31 of overcoat 3, and to unclamping direction rotation overcoat 3, jaw 6 is return, and unclamps drill bit.
The utility model utilizes the screw thread transmission of protheca and drill body, and the elastic claw of protheca, along the inside circumference face of the male cone (strobilus masculinus) tensioner overcoat of drill body, reaches the object of pinning screw and jaw, does not return loosening thereby pin drill bit.It is rational in infrastructure, easy for operation, can make electric drill in impact process, prevent that drill bit from getting loose, and is a kind of desirable locking drill chuck.
Claims (5)
1. a locking drill chuck, it comprises drill body, jaw, screw, nut sleeve, steel pad, bearing, bonnet, overcoat, protheca, three jaws are arranged on respectively in three decile inclined holes of drill body, screw is arranged in the screw groove of drill body, the screw thread of screw and jaw forms thread transmission, nut sleeve is fixedly connected with screw, nut sleeve is injection-moulded in overcoat, bonnet is fixedly connected with drill body, it is characterized in that: the anterior cylinder of described drill body is provided with external screw thread, and on drill body, cylindrical rear portion is provided with a male cone (strobilus masculinus); Described protheca inner peripheral surface is provided with the internal thread coordinating with the external screw thread of drill body, and protheca rear portion is provided with several elastic claws, and described elastic claw inner side is provided with the male cone (strobilus masculinus) of drill body and coordinates inner conical surface, and elastic claw outside is provided with outer circumference surface; The inner side of described overcoat arranges the inner peripheral surface coordinating with the outer circumference surface on elastic claw.
2. locking drill chuck according to claim 1, is characterized in that: between described protheca rear elastic pawl, be axially arranged with groove.
3. locking drill chuck according to claim 1, is characterized in that: on described elastic claw, the rear end of inner conical surface is provided with a boss.
4. locking drill chuck according to claim 1, is characterized in that: described external screw thread is sinistral external thread.
5. locking drill chuck according to claim 1, is characterized in that: described internal thread is levogyrate inner thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420292635.9U CN203863089U (en) | 2014-06-04 | 2014-06-04 | Anti-loose drill chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420292635.9U CN203863089U (en) | 2014-06-04 | 2014-06-04 | Anti-loose drill chuck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203863089U true CN203863089U (en) | 2014-10-08 |
Family
ID=51644079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420292635.9U Expired - Fee Related CN203863089U (en) | 2014-06-04 | 2014-06-04 | Anti-loose drill chuck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203863089U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104942323A (en) * | 2015-07-15 | 2015-09-30 | 山东威达机械股份有限公司 | Noiseless self-locking drill chuck |
-
2014
- 2014-06-04 CN CN201420292635.9U patent/CN203863089U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104942323A (en) * | 2015-07-15 | 2015-09-30 | 山东威达机械股份有限公司 | Noiseless self-locking drill chuck |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20180604 |