CN1265923C - Self-tightening type drill chuck in modified structure - Google Patents
Self-tightening type drill chuck in modified structure Download PDFInfo
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- CN1265923C CN1265923C CN 200410017129 CN200410017129A CN1265923C CN 1265923 C CN1265923 C CN 1265923C CN 200410017129 CN200410017129 CN 200410017129 CN 200410017129 A CN200410017129 A CN 200410017129A CN 1265923 C CN1265923 C CN 1265923C
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- self
- main body
- drill chuck
- tightening
- convex shoulder
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Abstract
The present invention relates to a self fastened drill chuck with an improved structure, which belongs to the technical field of machinery. The present invention solves the defects of complicated structure and insufficient reliability, etc., of the existing self fastened drill chucks, and comprises a drill chuck main body, a ball cap, a chucking jaw base and an outer sleeve, wherein the main body is arranged in the inner cavity of the chucking jaw; the head part of the chucking jaw base is provided with a chucking jaw; a self fastened screw is connected with the main body by screw threads; the side surface of the main body is provided with a convex shoulder; a bearing and an elastomer are arranged between the upper part of the convex shoulder and the ball cap; the lower part of the convex shoulder is provided with a loading controlling elastic sheet which is fixedly connected with the chucking jaw base; a plurality of elastic sheets ejecting upward are arranged on the loading controlling elastic sheet; a bulge convex upward is arranged on each elastic sheet; a unidirectional ratchet is arranged on the lower side surface of the convex shoulder. The self fastened drill chuck controls the size of the chucking force of the drill chuck by the degree of the elasticity of the elastomer and the elastic sheet of the loading controlling elastic sheet. The present invention has the advantages of simple and reasonable structure, and higher reliability.
Description
Technical field
The invention belongs to field of mechanical technique, the drill chuck that uses on particularly a kind of lathe or the drilling machine.
Background technology
In industries such as machine-building, electronic apparatus, weaving, medicine, on employed bench drill, electric hand drill or the lathe, often need with drill chuck clamping drilling cutlery or cutter.Existing drill chuck has two types usually: a kind of is spanner drill chuck, and this drill chuck is clamping and pine all needs aid when unloading drill bit, operates cumbersome; Another kind is a self-tightening drill chuck.Self-tightening drill chuck is easy to when clamping drill bit by the principle of self-tightening.But often because clamping force is excessive, it is but very difficult that pine is unloaded drill bit.
For this reason, many people and have proposed various solutions in this problem of research, and what have has also applied for patent.Chinese patent 012433942 provides a kind of " keyless drill chuck ", comprise main body, jaw, screw and overcoat, screw and jaw engagement, be in transmission connection axle upper end is externally connected to actuating sleeve, between main body thrust surface and screw, be provided with a rotating ratchet, be provided with rolling element between ratchet and the screw, drive an overcoat and an annular drive part and engage.This keyless drill chuck can increase self-tightening power limitedly, but its structure is quite complicated, makes the cost of product too high, is difficult to be used widely.Simultaneously, between its ratchet and the screw rolling element is arranged, be easy to wearing and tearing during use, influence the life-span of drill chuck.
The inventor had also once designed a kind of " ring power keyless drill chuck ", and had applied for that (patent No. is patent: 942033221).This ring power keyless drill chuck is made up of main body, end shield, interior cover, overcoat, claw, roller lid, roller, bearing, dust cover and self-tightening screw nail, between roller lid and end shield, axial limit force mechanisms is housed, be equipped with between main body and the self-tightening screw nail and radially limit force mechanisms, also have additional the raceway on roller lid and the main body convex shoulder.Ring power self-tightening drill chuck be by axially and limit force mechanisms radially prevent that self-tightening power from increasing the disadvantage that the drill bit that causes can't unload, and has certain practical value.But this keyless drill chuck also exists weak points such as structure more complicated, reliability be not enough.The self-tightening drill chuck of existing other type also exists similar problem.
Summary of the invention
The objective of the invention is provides a kind of self-tightening drill chuck at the existing the problems referred to above of existing self-tightening drill chuck, makes it have the big and pine of rational in infrastructure, self-tightening power and unloads easy characteristics.
For achieving the above object, the present invention has adopted following technical proposal: this self-tightening drill chuck comprises the drill chuck main body, the ball lid, jaw seat and overcoat, overcoat connects with the jaw seat by screw thread, the ball lid is fixed in the inboard of jaw seat, main body is loaded in the inner chamber of jaw seat, the head of jaw seat has three guide grooves, jaw all is housed in the guide groove, the center of main body is a through hole, a self-tightening screw nail is arranged in this through hole, self-tightening screw nail links by screw thread and main body, the inner of each jaw is socketed on the head of self-tightening screw nail, it is characterized in that, there is a convex shoulder side of described main body, between the top of convex shoulder and the ball lid bearing and elastomer are housed, be provided with a control in the bottom of convex shoulder and carry shell fragment, shell fragment is carried in control and the jaw seat is connected, and carries the flexure strip that has several to pop up on the shell fragment in control, a projection protruding upward is arranged on each flexure strip, have unidirectional ratchet on the downside of convex shoulder.
In this self-tightening drill chuck, make under the situation that jaw seat and overcoat be maintained fixed, rotate main body, main body will move down self-tightening screw nail by screw thread.Moving down of self-tightening screw nail driven the jaw that is socketed on the self-tightening screw nail head and moved down together, and three jaws are inwardly shunk simultaneously, clamps drill bit.
Just beginning the stick of tool head or under clamping force is not very big situation, because the convex shoulder top of main body side is provided with bearing and elastomer, under elastomeric elastic force effect convex shoulder is being moved down, convex shoulder is pressed on control and carries on the shell fragment.Particularly, the unidirectional ratchet of convex shoulder downside is pressed on the projection of flexure strip, and the flexure strip outer end can not embed in the teeth of unidirectional ratchet, makes main body to carry shell fragment with respect to control and freely rotates, and also just can freely rotate with respect to the jaw seat.Therefore, under this state, along with the rotation of main body with respect to the jaw seat, jaw inwardly shrinks, and gradually drill bit is clamped.
Along with the increase of clamping force, the thrust that main body promotes self-tightening screw nail also increases, and obviously the reaction force of jaw action on main body also increases, so main body compresses elastomeric conversely.When clamping force increases to a certain degree, along with main body to elastomeric compression, main body moves up, the unidirectional ratchet of convex shoulder downside just can't be pushed down the projection on the flexure strip.At this moment, the outer end of flexure strip will embed in the unidirectional ratchet, and unidirectional ratchet can not be rotated along the direction of tightening up jaw.In the case, main body and jaw seat and overcoat fuse, and can not relatively rotate, and the clamping force that also just can not make jaw clamp drill bit increases.Like this, just the clamping force of this self-tightening drill chuck can be controlled in the scope that sets.
When the needs den bohrkopf abbauen, owing to be unidirectional ratchet, so main body can carry shell fragment along counter-rotation with respect to control, just be easy to make self-tightening screw nail to rise, and jaw is unclamped and withdraws from drill bit.
In above-mentioned self-tightening drill chuck, described elastomer adopts elastomeric material to make.
Elastomer also can adopt several disk springs to combine.
In this self-tightening drill chuck, the flexure strip elasticity size of carrying shell fragment by elastomer and control is controlled the height of drill chuck clamping force, and it is simple and reasonable, and has higher reliability.This self-tightening drill chuck not only can make clamping force be provided with higherly owing to clamping force can be limited in certain scope, and pine unloads very laborsavingly, has higher utility.
Description of drawings
Fig. 1 is the structural representation of this self-tightening drill chuck.
Fig. 2 is the profile schematic diagram that shell fragment is carried in control in this self-tightening drill chuck.
Fig. 3 is the upward view of main body in this self-tightening drill chuck.
Among the figure, 1, main body; 11, convex shoulder; 12, through hole; 13, unidirectional ratchet; 14, degree of tightness cover; 2, overcoat; 3, jaw seat; 4, jaw; 5, self-tightening screw nail; 6, ball lid; 7, shell fragment is carried in control; 71, flexure strip; 72, projection; 73, positioning head; 8, elastomer; 9, ball; 91, bearing cap.
The specific embodiment
As shown in Figure 1, this self-tightening drill chuck comprises the parts such as main body 1, ball lid 6, jaw seat 3, self-tightening screw nail 5, jaw 4 and overcoat 2 of drill chuck.Main body 1 is the structure of approximate circle tubular, and there is a through hole 12 at its center, and self-tightening screw nail 5 links by screw thread and main body 1.In rotating main body 1 process, if self-tightening screw nail 5 does not rotate, so will be flexible up and down along main body 1.
The same with common drill chuck, at the head of jaw seat 3 three guide grooves are arranged, jaw 4 is housed in the guide groove.Jaw 4 can slide along guide groove.The inner of three jaws 4 all is socketed on the head of self-tightening screw nail 5, so jaw 4 is along with the flexible of self-tightening screw nail 5 slides up and down.
As shown in Figure 1, there is a convex shoulder 11 side of main body 1, between the top of convex shoulder 11 and the ball lid 6 bearing and elastomer 8 is housed.Bearing plays and reduces in main body 1 rotation process and the frictional force effect between the jaw seat 3.In the present embodiment, bearing is by some balls 9 with place the bearing cap 91 on the ball 9 to be formed.
In the bottom of convex shoulder 11 is that shell fragment 7 is carried in a control.As shown in Figure 2, a control year shell fragment 7 is the metallic plate of a sheet annular.Carry positioning heads 73 that several downward bendings are arranged in the shell fragment 7 in control, these positioning heads 73 all are embedded in the jaw seat 3.Thus, making control carry shell fragment 7 is fixed together with jaw seat 3.
As shown in Figure 2, on control year shell fragment 7, three flexure strips that pop up 71 are arranged, and on each flexure strip 71 projection protruding upward 72 is arranged all.Flexure strip 71 has certain elasticity.In the present embodiment, above-mentioned flexure strip 71, projection 72 are carried shell fragment 7 with control and are connected as a single entity.
As shown in Figure 3, on the downside of main body 1 convex shoulder 11, have unidirectional ratchet 13.When this self-tightening drill chuck did not clamp drill bit, under the elastic force effect of elastomer 8, main body 1 had downward pressure, and the unidirectional ratchet 13 of convex shoulder 11 downsides is pressed on the projection 72 of control year shell fragment 7, made main body 1 keep free rotary state.
Increase along with clamping force, main body 1 rises, and the unidirectional ratchet 13 of convex shoulder 11 downsides can't be pushed down projection 72, and flexure strip 71 outer ends will embed in the unidirectional ratchet 13, the clamping force that just can prevent 4 pairs of drill bits of jaw improves, and the clamping force of drill chuck is controlled in the scope of setting.Obviously, in this self-tightening drill chuck, the size of maximum clamping force elastic force direct and elastomer 8 is proportional.
When the needs den bohrkopf abbauen,, jaw 4 is unclamped get final product as long as counter-rotating main body 1 rises self-tightening screw nail 5.
In the present embodiment, be provided with a degree of tightness cover 14 in the upper end of main body 1, degree of tightness cover 14 is connected by spline and main body 1.By degree of tightness cover 14, facilitate the operation of this self-tightening drill chuck when stick of tool head and loose unloading.
In the present embodiment, elastomer 8 is to adopt elastomeric material to make.
Claims (9)
1, a kind of self-tightening drill chuck, comprise drill chuck main body (1), ball lid (6), jaw seat (3) and overcoat (2), overcoat (2) connects with jaw seat (3) by screw thread, ball lid (6) is fixed in the inboard of jaw seat (3), main body (1) is loaded in the inner chamber of jaw seat (3), the head of jaw seat (3) has three guide grooves, jaw (4) all is housed in the guide groove, the center of main body (1) is a through hole (12), a self-tightening screw nail (5) is arranged in this through hole (12), self-tightening screw nail (5) links by screw thread and main body (1), the inner of each jaw (4) is socketed on the head of self-tightening screw nail (5), it is characterized in that, there is a convex shoulder (11) side of described main body (1), between the top of convex shoulder (11) and the ball lid (6) bearing and elastomer (8) are housed, be provided with a control in the bottom of convex shoulder (11) and carry shell fragment (7), control is carried shell fragment (7) and is connected with jaw seat (3), on control year shell fragment (7), several flexure strips that pops up (71) are arranged, a projection protruding upward (72) is arranged on each flexure strip (71), have unidirectional ratchet (13) on the downside of convex shoulder (11).
2, self-tightening drill chuck according to claim 1 is characterized in that, described elastomer (8) adopts elastomeric material to make.
3, self-tightening drill chuck according to claim 1 is characterized in that, described elastomer (8) adopts several disk springs to combine.
According to claim 1,2 or 3 described self-tightening drill chucks, it is characterized in that 4, described bearing is by some balls (9) and place the bearing cap (91) on the ball (9) to be formed.
According to claim 1,2 or 3 described self-tightening drill chucks, it is characterized in that 5, it is the metallic plate of a sheet annular that shell fragment (7) is carried in described control.
6, self-tightening drill chuck according to claim 5 is characterized in that, carrying in control has several positioning heads (73) of bending downwards in the shell fragment (7), and these positioning heads (73) all are embedded in the jaw seat (3).
7, self-tightening drill chuck according to claim 5 is characterized in that, carrying on the shell fragment (7) in control has three flexure strips that pop up (71), and on each flexure strip (71) projection protruding upward (72) is arranged all.
8, self-tightening drill chuck according to claim 7 is characterized in that, described flexure strip (71), projection (72) are carried shell fragment (7) with control and be connected as a single entity.
9, according to claim 1,2 or 3 described self-tightening drill chucks, it is characterized in that, be provided with a degree of tightness cover (14) in the upper end of main body (1), degree of tightness cover (14) is connected by spline and main body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410017129 CN1265923C (en) | 2004-03-19 | 2004-03-19 | Self-tightening type drill chuck in modified structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410017129 CN1265923C (en) | 2004-03-19 | 2004-03-19 | Self-tightening type drill chuck in modified structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1562541A CN1562541A (en) | 2005-01-12 |
| CN1265923C true CN1265923C (en) | 2006-07-26 |
Family
ID=34478787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410017129 Expired - Fee Related CN1265923C (en) | 2004-03-19 | 2004-03-19 | Self-tightening type drill chuck in modified structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1265923C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007118349A1 (en) * | 2006-04-14 | 2007-10-25 | Zhenqian Hu | Manually fastened drill chuck |
| US8057134B2 (en) * | 2007-06-26 | 2011-11-15 | Techtronic Power Tools Technology Limited | Chuck assembly |
| CN103212739B (en) * | 2013-04-18 | 2016-12-28 | 玉环胜友工具有限公司 | Double main supporting type self-fastening drill chunk |
| CN103212736B (en) * | 2013-04-18 | 2016-07-13 | 玉环胜友工具有限公司 | Composite bearing for keyless drill chuck |
-
2004
- 2004-03-19 CN CN 200410017129 patent/CN1265923C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1562541A (en) | 2005-01-12 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20060726 Termination date: 20160319 |