CN1194195A - Self fastening drill chuck - Google Patents
Self fastening drill chuck Download PDFInfo
- Publication number
- CN1194195A CN1194195A CN98104888A CN98104888A CN1194195A CN 1194195 A CN1194195 A CN 1194195A CN 98104888 A CN98104888 A CN 98104888A CN 98104888 A CN98104888 A CN 98104888A CN 1194195 A CN1194195 A CN 1194195A
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- Prior art keywords
- self
- screw rod
- main body
- double speed
- tightening
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Abstract
The drill chuck includes chuck body, ball cover, jaw holder and casing. The jaw holder has guide slot in its head and self-fastening screw inside its cavity, the chuck body has inside it tubular double-speed screw, which is connected to both the chuck body outside it and the self-fastening screw inside it and has outer thread pitch several times the inner thread pitch. The chuck body has also annular thrust washer in the bottom. The said chuck can clamp and unclamp bit easily and this can raise working efficiency of machine tool.
Description
The invention relates to the drill chuck that uses on a kind of lathe, particularly self-tightening drill chuck.
The drill chuck that uses on the lathe generally has two types: a kind of is spanner drill chuck, and this drill chuck clamping and pine are unloaded drill bit needs aid, very inconvenient; Another kind is a self-tightening drill chuck.Present employed self-tightening drill chuck clamps the drill bit ratio and is easier to, but pretty troublesome when pine is unloaded drill bit, particularly for various reasons, required cutting force increased after drill bit pierced workpiece, the moment that motor produced will increase so, and the clamping force that anchor clamps are acted on the drill bit also increases.Like this, drill bit just is difficult to unload down.
The self-tightening drill chuck that Chinese patent 94246024.3 provides is on the basis of common drill chuck, and overload protection is provided, and can prevent effectively that drill chuck from clamping the situation that pine does not go out behind the drill bit and taking place.But this drill chuck is owing to can not transmit big moment, and maximum cutting force is little, has influence on the boring ability of drill bit, and it can not be used widely.
The purpose of the invention is at present existing the problems referred to above, and a kind of self-tightening drill chuck of new structure is provided, and the cutting force that makes drill chuck produce when work is not restricted, and can both unload the drill bit pine down.
The purpose of the invention is to adopt following technical proposal to realize: this self-tightening drill chuck comprises drill chuck main body, ball lid, jaw seat and overcoat, ball lid and jaw cover for seat connect, overcoat connects with the ball lid by screw thread, main body is located in the inner chamber of ball lid, the head of jaw seat has guide groove, and jaw is housed in the guide groove, is provided with self-tightening screw nail in the inner chamber of jaw seat, jaw is socketed in the head of self-tightening screw nail, and the afterbody of self-tightening screw nail connects with main body by screw thread.This is the basic structure of self-tightening drill chuck, by rotating main body, flexible self-tightening screw nail, just can reach the purpose that clamps or unclamp drill bit.The invention is the double speed screw rod that the pipe shape is set in the inboard of its main body, thread connection is passed through in the outside of double speed screw rod and the inboard of main body, the inboard of double speed screw rod and the afterbody of self-tightening screw nail are also by thread connection, and the external screw thread pitch on the double speed screw rod is the several times of its internal thread pitch.The bottom of main body also is provided with thrust washer, and thrust washer is an annular, and plush copper is all arranged on its internal and external circumference, all has on the side edge of main body and the double speed screw rod and the corresponding groove of plush copper, makes plush copper be positioned at groove.In said structure, the double speed screw rod is actually the effect of transmitting moment of playing.Because the external screw thread pitch of double speed screw rod is much larger than internal thread pitch, so as long as act on a less power on main body, just can produce a bigger power on self-tightening screw nail.Although drill chuck the time holds very tightly in work like this, can unload the drill bit pine down.
The invention is owing to just make improvements the structure of drill chuck body interior, and other part remains unchanged substantially, so that it is implemented is easy, very high practical value is arranged; This self-tightening drill chuck adopts the double speed screw rod, and it is very convenient laborsaving to make the clamping of drill bit and pine unload, and can improve the operating efficiency of lathe.
The embodiment that provides below in conjunction with accompanying drawing elaborates to the invention.
Fig. 1 is the cutaway view of this self-tightening drill chuck.
Fig. 2 is the upward view of double speed screw rod.
Fig. 3 is the upward view of main body.
Fig. 4 is the schematic diagram of thrust washer.
As shown in Figure 1, this self-tightening drill chuck comprises main body (1), ball lid (2), jaw seat (3), jaw (4), overcoat (5), double speed screw rod (6) and self-tightening screw nail (7) etc.Ball lid (2) lower end external diameter thread connection overcoat (5), endoporus cooperates with jaw seat (3), and joins together by round pin.Between main body (1) and ball lid (2), be provided with ball (8), the self-tightening power that produces when being used for bearing work.The afterbody of main body (1) is provided with end shield (9), and is connected with motor by end shield (9).
In the present embodiment, the external screw thread of double speed screw rod (6) adopts multiple thread, and its pitch is very big, and helical angle is greater than 10 degree, and it is free and relaxed to make hand unload drill bit.
As Fig. 2, Fig. 3 and shown in Figure 4, thrust washer (10) is an annular, and plush copper (11) is all arranged on the internal and external circumference, and the plush copper on the inner periphery (11) is stuck in the groove (12) of double speed screw rod (6), and thrust washer (10) and double speed screw rod (6) are connected firmly together; Plush copper on the excircle (11) is positioned at the groove (12) on main body (1) side edge, and can come less angle of back rotation in this groove (12).The effect of thrust washer (10) is the anglec of rotation of restriction double speed screw rod (6).When using this drill chuck, at first drill bit is inserted in the jaw (4), by end shield (9) rotating main body (1), make double speed screw rod (6) relatively rotate.After double speed screw rod (6) turns over a low-angle, because thrust washer (10) blocks, make double speed screw rod (6) not rotate with respect to main body (1), but along with main body (1) is rotated together, and cause that self-tightening screw nail (7) is protruding, clamp drill bit at last.Like this, but drill chuck operate as normal just.The helical angle of self-tightening screw nail (7) designs very for a short time, less than 4 degree, makes drill chuck can produce very big clamping force when work in the present embodiment.When drill chuck is finished using, in the time that drill bit need being unloaded down,, and cause main body (1) rotation at first along opposite spin end shield (9).At this moment, because the plush copper (11) on thrust washer (10) excircle can move in the groove (12) on main body (1) side edge, double speed screw rod (6) just can be along low-angle of counter-rotation.Because the external screw thread of double speed screw rod (6) has the bigger anglec of rotation, this rotation is more laborsaving.Can cause that like this self-tightening screw nail (7) is loosening, be rotated further main body (1) and just can unload the drill bit pine down.
In the present embodiment, pretightening butterfly spring (13) is set also in the inner chamber of main body (1), is provided with in the endoporus of double speed screw rod (6) and adjusts packing ring (14).Adjust the axial force size that packing ring (14) can be used for adjusting pretightening butterfly spring (13).In addition, be provided with screw rod capping (15) in the bottom side of double speed screw rod (6).Screw rod capping (15) is in order to prevent that swarf from entering main body (1) inside.
Claims (4)
1, a kind of self-tightening drill chuck, comprise drill chuck main body (1), ball lid (2), jaw seat (3) and overcoat (5), ball lid (2) and jaw seat (3) socket, overcoat (5) connects with ball lid (2) by screw thread, main body (1) is located in the inner chamber of ball lid (2), the head of jaw seat (3) has guide groove, jaw (4) is housed in the guide groove, be provided with self-tightening screw nail (7) in the inner chamber of jaw seat (3), jaw (4) is socketed in the head of self-tightening screw nail (7), the afterbody of self-tightening screw nail (7) connects with main body (1) by screw thread, it is characterized in that the inboard of main body (1) is provided with the double speed screw rod (6) of pipe shape, thread connection is passed through in the inboard of the outside of double speed screw rod (6) and main body (1), the afterbody of the inboard of double speed screw rod (6) and self-tightening screw nail (7) also passes through thread connection, and the external screw thread pitch on the double speed screw rod (6) is the several times of its internal thread pitch, the bottom of main body (1) also is provided with thrust washer (10), thrust washer (10) is an annular, plush copper (11) is all arranged on its internal and external circumference, all have on the side edge of main body (1) and the double speed screw rod (6) and the corresponding groove of plush copper (11) (12).
2, self-tightening drill chuck according to claim 1 is characterized in that the external screw thread of described double speed screw rod (6) is a multiple thread.
3, self-tightening drill chuck according to claim 1 and 2 is characterized in that in described main body (1) inner chamber pretightening butterfly spring (13) being set also, is provided with in the endoporus of double speed screw rod (6) to adjust packing ring (14).
4, self-tightening drill chuck according to claim 3 is characterized in that the bottom side of described double speed screw rod (6) is provided with screw rod capping (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98104888A CN1089285C (en) | 1998-04-07 | 1998-04-07 | Self fastening drill chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98104888A CN1089285C (en) | 1998-04-07 | 1998-04-07 | Self fastening drill chuck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1194195A true CN1194195A (en) | 1998-09-30 |
| CN1089285C CN1089285C (en) | 2002-08-21 |
Family
ID=5218539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98104888A Expired - Fee Related CN1089285C (en) | 1998-04-07 | 1998-04-07 | Self fastening drill chuck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1089285C (en) |
Cited By (4)
| 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 |
| CN102848432A (en) * | 2012-09-16 | 2013-01-02 | 李理 | Carpentry puncher chuck |
| CN103203643A (en) * | 2013-05-02 | 2013-07-17 | 哈尔滨工业大学 | Magnetic self-pretightening device for high-speed electric main shaft chuck |
| CN105880694A (en) * | 2016-06-03 | 2016-08-24 | 柳尧亭 | Self-tightening drill chuck provided with external threads |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042505A (en) * | 1988-11-09 | 1990-05-30 | 重庆大学 | Technology for laser renovating surface defect of castings |
| CN2177550Y (en) * | 1993-04-16 | 1994-09-21 | 上海机床附件一厂 | Hand-tightening drill chuck |
| CN2192421Y (en) * | 1994-01-21 | 1995-03-22 | 刘国政 | Auto-tighten drill clamping head |
-
1998
- 1998-04-07 CN CN98104888A patent/CN1089285C/en not_active Expired - Fee Related
Cited By (5)
| 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 |
| CN102848432A (en) * | 2012-09-16 | 2013-01-02 | 李理 | Carpentry puncher chuck |
| CN103203643A (en) * | 2013-05-02 | 2013-07-17 | 哈尔滨工业大学 | Magnetic self-pretightening device for high-speed electric main shaft chuck |
| CN103203643B (en) * | 2013-05-02 | 2015-03-11 | 哈尔滨工业大学 | Magnetic self-pretightening device for high-speed electric main shaft chuck |
| CN105880694A (en) * | 2016-06-03 | 2016-08-24 | 柳尧亭 | Self-tightening drill chuck provided with external threads |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1089285C (en) | 2002-08-21 |
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| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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Addressee: You Yourong Document name: payment instructions |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |