CN202291471U - Novel self-tightening drill chuck - Google Patents
Novel self-tightening drill chuck Download PDFInfo
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- CN202291471U CN202291471U CN2011203361041U CN201120336104U CN202291471U CN 202291471 U CN202291471 U CN 202291471U CN 2011203361041 U CN2011203361041 U CN 2011203361041U CN 201120336104 U CN201120336104 U CN 201120336104U CN 202291471 U CN202291471 U CN 202291471U
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- drill chuck
- nut
- thread
- screw mandrel
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Abstract
The utility model relates to a novel self-tightening drill chuck, which is used for solving the technical problems in the prior art that a push lead screw and a push nut are easy to be over-tight or over-loosened and a locking spring sheet is easy to rub with an inner hole so that the normal automatic clamping force is influenced. The novel self-tightening drill chuck is provided with a drill chuck body and a clamping claw; the drill chuck body is provided with a clamping claw hole and the clamping claw is arranged in the clamping claw hole; the drill chuck is further provided with the push lead screw and the push nut; a thread is arranged on the outer surface of the push lead screw and the thread is matched with a thread which is arranged on the inner surface of the push nut; the push nut is connected with the clamping claw; the novel self-tightening drill chuck is characterized in that the range of a lead angle alpha of the thread on the outer surface of the push lead screw and the range of the lead angle alpha of the thread on the inner surface of the push nut are as follows: alpha is more than or equal to 2 degrees and is less than or equal to 8 degrees. The novel self-tightening drill chuck provided by the utility model has the advantages of great clamping force, capability of continuously keeping and high precision and stability, so that the novel self-tightening drill chuck can be widely applied to the production operation.
Description
Technical field
The utility model relates to a kind of anchor clamps, is a kind of new-type keyless drill chuck specifically.
Background technology
In activity in production, need often to use operations such as instruments such as lathe, electric drill are holed, milling.Be installed in the drill chuck that is used for cutters such as clamping drilling bit, milling cutter on these tool host working shafts and experienced long-term application and improvement, obtained significant progress.
Date of declaration is that the Chinese utility model patent that August 19, notification number in 2009 are CN 201291311Y discloses a kind of self-tightening drill chuck, and it comprises that drill chuck body, three smooth surfaces do not establish the jaw of screw thread, promote screw mandrel and promote nut, and the upper end of drill chuck body is processed with and promotes the connecting hole of screw mandrel lower end external diameter coupling; The lower end that promotes screw mandrel is movably set in the said connecting hole, is provided with the stopping means that prevents that both break away between drill chuck body and the said promotion screw mandrel, and the outer surface that promotes screw mandrel is processed with screw thread; Promote nut and be rotatably connected on the promotion screw mandrel, the lower end, outer that promotes nut is processed with three open groove, and the upper end of three jaws is provided with the plush copper with the open recess coupling; Plush copper is movably set in the corresponding opening groove, and this product has the function of automatic clamp-on tool, and chucking power is big; Precision is high with stability; Simultaneously simple in structure, in light weight, be easy to processing and miniaturization; Production cost is low, is convenient to promote the use of.
But,, promote screw mandrel and promote to occur tension easily between the nut and stuck or cross pine and insecure technical problem according to the disclosed technical scheme of this utility model patent; Simultaneously, the locking spring leaf easily and its endoporus generation rubs and the normal formation of clamping force automatically of influence.
The utility model content
One of the utility model technical problem to be solved is to promote screw mandrel in the prior art and promote between the nut too tight or too loose easily; Two of technical problem to be solved is easy and its endoporus generation friction and normal automatic clamping forces of influence of locking spring leaf.
For solving the problems of the technologies described above; The utility model provides a kind of new-type keyless drill chuck, and it is provided with drill chuck body and jaw, and the drill chuck body is provided with the jaw hole; Jaw is located in the jaw hole; Drill chuck also is provided with the promotion screw mandrel and promotes nut, and the outer surface that promotes screw mandrel is provided with screw thread, and it is complementary with the screw thread that promotion nut inner surface is provided with; Promote nut and be connected with jaw, said promotion screw mandrel outer surface thread with the scope of the lead angle α that promotes nut inner surface screw thread is: 2 °≤α≤8 °.
The utility model optimized technical scheme is: the scope that promotes screw mandrel outer surface thread and the lead angle α that promotes nut inner surface screw thread is: 3 ° 48 '≤α≤6 ° 44 '.
The further optimized technical scheme of the utility model is: the scope that promotes screw mandrel outer surface thread and the lead angle α that promotes nut inner surface screw thread is: 4 ° 48 '≤α≤5 ° 47 '.
The further again optimized technical scheme of the utility model is: also be provided with locking device on the drill chuck, locking device comprises the locking spring leaf, promotes to be provided with spring between nut and the locking spring leaf.
The utility model further optimized technical scheme is: said spring is the turriform spring.
In the utility model technical scheme, under the prerequisite that the remainder structure is confirmed, promoting the screw mandrel outer surface thread is one of key that realizes the utility model technique effect with the value that promotes nut inner surface thread helix lift angle α.If the value of α is too small, promote screw mandrel and promote will be in the tension state between the nut, stuck easily; And if the value of α is excessive, promote screw mandrel and promote will be in loose state between the nut, it is unreliable to connect.The utility model since choose reasonable promote screw mandrel outer surface thread and the value that promotes nut inner surface thread helix lift angle; Promote screw mandrel and promote to be in suitable connection status between the nut thereby make, be not prone to tension and stuck or cross pine and insecure phenomenon.
Further; The utility model is owing to promoting to be provided with spring between nut and the locking spring leaf; When spring unclamped, it can expand into not compressed size, and the locking spring leaf is pushed open; Make the locking spring leaf break away from its shell, thereby avoid locking spring leaf and its endoporus to produce friction and influence the trouble that normal clamping force automatically forms.
Further, the used spring of the utility model is the turriform spring, and when the turriform spring was compressed to the limit, its thickness had only the diameter of turriform spring spring wire, thereby made the integral miniaturization of product.
Below in conjunction with accompanying drawing the utility model is done further explanation.
Description of drawings
Fig. 1 is a product cutaway view of the prior art;
Fig. 2 is the product assembling sketch map among the utility model embodiment;
Fig. 3 is the structural representation of turriform spring among the utility model embodiment.
Among the figure, 1. drill chuck body; 11. the stable pin of jaw; 12. closed screw; 2. jaw; 23. long bushing; 27. spring; 3. promotion nut; 4. promotion screw mandrel; 42. main frame connecting hole; 5. locking spring leaf; 6. locking gland; 7. lock-nut; 8. bearing ball; 9. shell; 91. locking steel ring; 29. back cover.
The specific embodiment
Embodiment 1:
As shown in Figure 2, a kind of new-type keyless drill chuck comprises drill chuck body 1, jaw 2, long bushing 23, promotion screw mandrel 4, promotes nut 3, spring 27, locking spring leaf 5, back cover 29, lock-nut 7.
Obliquely be processed with a plurality of jaw holes at two ends up and down of running through on the drill chuck; It can be 3, also can be for more than 3, and jaw 2 is slidingly installed in respectively in the jaw hole; The outer surface that promotes screw mandrel 4 is processed with screw thread; Promote nut 3 was processed with and promoted screw mandrel 4 outer surface threads coupling along the axis internal thread, promote nut 3 and be rotatably connected on the promotion screw mandrel 4, the position corresponding with jaw 2 upper ends, lower end, outer that promotes nut 3 is processed with the T shape groove of opening along diametric(al); The upper end of jaw 2 is provided with the T shape plush copper that is complementary with T shape groove, and T shape plush copper is movably set in the corresponding T shape groove.
Promoting screw mandrel 4 outer surface threads is 8 ° with the lead angle α that promotes nut 3 inner surface screw threads.
When the utility model uses, cutter is inserted in the cutter hole, with hand rotation case 9; Driving the drill chuck body relatively rotates with the promotion screw mandrel 4 that is connected on the equipment working shaft; Because jaw 2 is sheathed in the jaw hole, the upper end of jaw 2 is sheathed on respectively and promotes in the corresponding T shape groove that nut 3 is provided with, thus shell with relatively rotating of promotion screw mandrel 4 also force promote nut 3 along with shell and drill chuck body synchronously with promote screw mandrel 4 and do and relatively rotate; Promoting nut 3 moves down under the effect of the screw thread that promotes screw mandrel 4; Drive jaw 2 and move down along the jaw hole, the space between jaw 2 lower ends also dwindles thereupon, puts into the cutter in cutter hole until clamping; This moment the starting device motor; Promote screw mandrel 4 high speed under the drive of working shaft and rotate, because the static action of inertia of drill chuck body, shell 9 and promotion nut 3 has stronger impulsive force to play rotation to force drill chuck body, shell 9 and promotion nut 3 to follow one of which in the starting stage that promotes screw mandrel 4 startups; This impulsive force further makes jaw 2 clamp-on tools; Reaction force between cutter and the workpiece afterwards also relatively rotates forcing drill chuck body, shell 9 and promote to do between nut 3 and the promotion screw mandrel 4, and this has increased the chucking power of 2 pairs of cutters of jaw equally automatically; Thereby possessed the function of self-tightening, make whole keyless drill chuck have very high precision and stability.
Behind clamp-on tool, rotate lock-nut 7, whole keyless drill chuck is by locked, and can reverse by realization equipment this moment, promptly realizes reverse machining functions.
The product that adopts technique scheme to produce; Because promoting screw mandrel 4 is to flexibly connect with drill chuck body 1; Thereby make the function that the utlity model has automatic clamp-on tool, the generation that interacts of the torque of the power transmission shaft of the equipment that its chucking power is connected by keyless drill chuck and the inertia resistance square of drill chuck body 1 and the moment of resistance of transmitting when adding the cutter operation of keyless drill chuck clamping in man-hour, so chucking power is big; And can continue to keep, precision is high with stability.
Promote screw mandrel 4 outer surface threads and the lead angle α that promotes nut 3 inner surface screw threads and be 6 ° 44 '.
Promote screw mandrel 4 outer surface threads and the lead angle α that promotes nut 3 inner surface screw threads and be 5 ° 47 '.
Promote screw mandrel 4 outer surface threads and the lead angle α that promotes nut 3 inner surface screw threads and be 4 ° 48 '.
Promote screw mandrel 4 outer surface threads and the lead angle α that promotes nut 3 inner surface screw threads and be 3 ° 48 '.
Embodiment 6
Promoting screw mandrel 4 outer surface threads is 2 ° with the lead angle α that promotes nut 3 inner surface screw threads.
The upper end that promotes screw mandrel 4 is provided with stopper slot, and locking spring leaf 5 is the disk spring that an outside is processed with the bar v notch v, is provided with spring 27 between locking spring leaf 5 and the promotion nut 3, and it is preferably turriform spring 27.And locking spring leaf 5 and promote the spring 27 between the nut 3 avoids locking spring leaf 5 and its endoporus to produce the trouble that friction and the normal clamping force automatically of influence form.The use of turriform spring 27 can make the integral miniaturization of product.
The utility model since choose reasonable promote the scopes of screw mandrel 4 outer surface threads and the lead angle α that promotes nut 3 inner surface screw threads, promote screw mandrel 4 and promote to be in suitable connection status between the nut 3 thereby make.
Table 1 is to get under the situation of different lead angle α, the correlation values that the moment spanner of employing 4-20NM records.
Table 1
| Embodiment | Lead angle α | Static clamping force | Static state is unclamped power | |
| 1 | 8° | ＜1.5 | ＜1.5 | 24 |
| 2 | 6°44′ | 1.6 | 1.6 | 24 |
| 3 | 5°47′ | 4.5 | 3 | 24 |
| 4 | 4°48′ | 8.5 | 4 | 24 |
| 5 | 3°48′ | 14 | 8 | 24 |
| 6 | 2° | 24 | 10.5 | 24 |
Annotate:
1, among the embodiment 6, product has good self-locking performance, and the clamping force that static state records originally is the reproduction of clamping force in the dynamic duty;
2, among the embodiment 1, product does not have self-locking performance, has been competent at the achievable task of product among the embodiment 6 during dynamic duty.
Should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the utility model creation design, can also make some distortion and improvement, all belong to the protection domain of the utility model.
Claims (5)
1. new-type keyless drill chuck, it is provided with drill chuck body and jaw, and the drill chuck body is provided with the jaw hole; Jaw is located in the jaw hole, and drill chuck also is provided with and promotes screw mandrel and promote nut, and the outer surface that promotes screw mandrel is provided with screw thread; It is complementary with the screw thread that promotion nut inner surface is provided with; Promote nut and be connected with jaw, it is characterized in that, said promotion screw mandrel outer surface thread with the scope of the lead angle α that promotes nut inner surface screw thread is: 2 °≤α≤8 °.
2. new-type keyless drill chuck according to claim 1, the scope that it is characterized in that promoting screw mandrel outer surface thread and the lead angle α that promotes nut inner surface screw thread is: 3 ° 48 '≤α≤6 ° 44 '.
3. new-type keyless drill chuck according to claim 2, the scope that it is characterized in that promoting screw mandrel outer surface thread and the lead angle α that promotes nut inner surface screw thread is: 4 ° 48 '≤α≤5 ° 47 '.
4. according to claim 1 or 3 described new-type keyless drill chucks, it is characterized in that also being provided with locking device on the said drill chuck, locking device comprises the locking spring leaf, promotes to be provided with spring between nut and the locking spring leaf.
5. new-type keyless drill chuck according to claim 4 is characterized in that said spring is the turriform spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203361041U CN202291471U (en) | 2011-09-02 | 2011-09-02 | Novel self-tightening drill chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203361041U CN202291471U (en) | 2011-09-02 | 2011-09-02 | Novel self-tightening drill chuck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202291471U true CN202291471U (en) | 2012-07-04 |
Family
ID=46360451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203361041U Expired - Fee Related CN202291471U (en) | 2011-09-02 | 2011-09-02 | Novel self-tightening drill chuck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202291471U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343447A (en) * | 2011-09-02 | 2012-02-08 | 威海达旺五金制品有限责任公司 | Novel self-tightened drill chuck |
| WO2014012238A1 (en) * | 2012-07-20 | 2014-01-23 | 威海达旺五金制品有限责任公司 | Novel drill chuck |
-
2011
- 2011-09-02 CN CN2011203361041U patent/CN202291471U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343447A (en) * | 2011-09-02 | 2012-02-08 | 威海达旺五金制品有限责任公司 | Novel self-tightened drill chuck |
| CN102343447B (en) * | 2011-09-02 | 2015-09-02 | 威海达旺五金制品有限责任公司 | A kind of Novel keyless drill chuck |
| WO2014012238A1 (en) * | 2012-07-20 | 2014-01-23 | 威海达旺五金制品有限责任公司 | Novel drill chuck |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20130902 |