CN2640667Y - Locking drill chuck - Google Patents
Locking drill chuck Download PDFInfo
- Publication number
- CN2640667Y CN2640667Y CN 03269053 CN03269053U CN2640667Y CN 2640667 Y CN2640667 Y CN 2640667Y CN 03269053 CN03269053 CN 03269053 CN 03269053 U CN03269053 U CN 03269053U CN 2640667 Y CN2640667 Y CN 2640667Y
- Authority
- CN
- China
- Prior art keywords
- locking
- protheca
- drill body
- drill
- sleeve
- 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 - Lifetime
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Abstract
The utility model relates to a locking type drill chuck, which comprises a drill body, clamping jaws, a screw nut, a screw nut sleeve, a front sleeve and a rear sleeve. Rear end of the drill body is provided with an axial hole connected with a driving shaft of a driving tool, and the external of the drill body is connected fixedly with the rear sleeve; the three clamping jaws are arranged respectively in three equant sloped holes in the drill body; the screw nut is meshed with the clamping jaws arranged in the sloped holes in the drill body; a locking sleeve is arranged between the front sleeve and the rear sleeve on external of the drill body; an elastic locking device consisting of a locking cap, rolling bodies and a locking tray is arranged between the drill body thrust face and the screw nut, wherein, the end face of the locking tray is provided with a plurality of slots with lead angles, and the slots are provided with the rolling bodies; the locking tray and a plurality of rolling bodies are fixed together by the elastic jaws of the locking cap; the locking sleeve is fixedly connected with the locking tray key slots. The utility model has simple structure, strong locking function, and high conversion efficiency of the moment input, labor saving and convenient operation and reliable clamping and locking, thus is suitable for the clamping of various drilling tools.
Description
Technical field
The utility model relates to a kind of drilling tool clamping device, specifically a kind of locking type clamping head of drill.
Background technology
We know that existing drill chuck generally is made up of drill body, jaw, screw, overcoat etc., and overcoat can comprise protheca, back cover again, and manually fastened chuck has increased bearing and bearing gasket reduces friction.Wherein the back is overlapped, bearing gasket interference respectively is connected on the drill body, three jaws are installed in respectively in the inclined hole of three five equilibriums on the drill body, screw is installed in the screw groove of drill body, threaded engagement on screw and the jaw forms thread transmission, the screw outside also can be provided with nut sleeve, nut sleeve and screw interference fit, nut sleeve is provided with protheca outward, and the protheca inwall is provided with key, nut sleeve is provided with keyway, protheca is connected through key with nut sleeve, and is moving for preventing the protheca string, at drill body front end interference fit joint door, during use, hand is twisted the protheca rotation, and protheca drives screw through nut sleeve and rotates, and screw drives in the inclined hole of jaw on drill body through screw thread and moves forward and backward, thereby three-jaw is opened or closure, to reach the purpose of unclamping or clamping drilling tool, the deficiency of said structure is that drill chuck is when work, because vibration or impact, drill chuck is easily loosening, has a strong impact on operating efficiency, poor stability.Along with widening of drilling tool range of application, market is more and more tighter to the performance requirement of drilling tool, is impacting and other real beating under the user mode, and the user also has higher requirement to the reliability of its work.Existing drill chuck effectively clamp and locking aspect have obviously deficiency.
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, and locking function is strong, and moment input conversion efficiency height is manipulated laborsaving, convenience, the locking type clamping head of drill of clamping and reliable lock.
The technical scheme in the invention for solving the above technical problem is: a kind of locking type clamping head of drill, include drill body, jaw, screw, nut sleeve, protheca, the back cover, the drill body rear end is provided with the axial hole that engages with the driving shaft of driven tool, the outside connection with the back cover fixed, three jaws are installed in respectively in the inclined hole of three five equilibriums in the drill body, screw and the jaw engagement that is installed in the drill body inclined hole, it is characterized in that: the outside protheca of drill body, back inner room is provided with lock sleeve, be provided with by locking cap between drill body thrust surface and screw, rolling element, the elastic locking device that locking plate is formed, wherein the locking plate end face is provided with the groove of several band lead angles, rolling element is housed in the groove, the elastic claw of locking cap is fixed together locking plate and several rolling elements, and lock sleeve and locking plate keyway are connected and fixed.
The said locking plate cylindrical of the utility model bottom is provided with keyway, and circle top is provided with and connects protruding key in the lock sleeve, and the keyway seamless connectivity is fixed between lock sleeve and the locking plate.Said lock sleeve cylindrical middle part is provided with several protruding keys, and the downside of outer boss key is provided with the opening keyway that is used for laying the interlock spring, and protheca inside circumference direction is provided with big gap keyway accordingly, and lock sleeve is by linking the spring guide-localization in the protheca keyway.Locking plate lower end cylindrical is provided with plurality of sections inclined-plane locked groove in the said locking device, correspondingly is provided with several elastic claws on the locking cap, and elastic claw can be along inclined-plane locked groove displacement, location, and rolling element is fixed in the groove of locking plate end face.The utility model also is provided with actuating sleeve between protheca and screw, nut sleeve, the driving key of actuating sleeve inserts in the driving groove of screw lower end, and three elastic claws of actuating sleeve periphery cooperate carry-over moment with the driving groove of protheca.The utility model protheca bottom is provided with the collar and baffle ring, and baffle ring is installed in the drill body annular groove, and the collar and baffle ring are tightly fixed, the location protheca.
The utility model is owing to adopt said structure, be provided with locking and drive effectively combination and the link gear that separates, compare with existing manually fastened chuck, realized its input of exclusive moment and locking function, in addition on the connecting mode of the location of protheca, adopted new structure, increased the power of deviating from of protheca greatly, made product be tending towards duty more reliably.The utility model is rational in infrastructure, easy to assembly, stable performance, laborsaving, easy, and advantages such as reliable operation are applicable to the clamping of various drilling tools.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a kind of structural representation of the utility model;
Fig. 2 is the another kind of structural representation of the utility model;
Fig. 3 is a kind of structural representation of locking plate;
Fig. 4 is the schematic top plan view of Fig. 3;
Fig. 5 is that the A-A of Fig. 4 is to enlarged diagram;
Fig. 6 is a kind of structural representation of lock sleeve;
Fig. 7 is a kind of structural representation of locking cap;
Fig. 8 is the structural representation of actuating sleeve among Fig. 2;
Fig. 9 is the structural representation of protheca among Fig. 2;
Figure 10 is the schematic top plan view of Fig. 9.
The specific embodiment
As shown in Figure 1 and Figure 2, a kind of locking type clamping head of drill of the utility model, include drill body 1, jaw 4, screw 3, protheca 6, back cover 2, bearing 12, drill body 1 rear end is provided with the axial hole that engages with the driving shaft of driven tool, outside and back cover 2 interference are connected and fixed, three jaws 4 are installed in respectively in the inclined hole of three five equilibriums in the drill body 1, screw 3 and jaw 4 engagements that are installed in the drill body inclined hole, screw 3 outsides are fixedly connected with protheca 6, also can be provided with nut sleeve 9 between protheca 6 and the screw 3, it works the driving effect that connects.The pass of above-mentioned composition, structure and coupled parts is a prior art, and this does not describe in detail.
Characteristics of the present utility model are that the outside protheca 6 of drill body, 2 in back cover are provided with lock sleeve 11, are provided with the elastic locking device of being made up of locking cap 15, rolling element 14, locking plate 13 between drill body thrust surface and screw.
As Fig. 3, Fig. 4, shown in Figure 5, locking plate 13 end faces described in the utility model are provided with the groove 13-1 of several band lead angles, and rolling element 14 is housed in the groove.End face groove 13-1 is λ 1, and two sections spiral cambers of λ 2 are formed, and fluted λ 1, λ locate lift angle for 2 liang and equate respectively, are equivalent to get the part of a complete helix curved surface at coaxial several spiral cambers that is copied into of same horizontal plane.This curved surface is same reproducible in as accompanying drawing 1, described all the stressed end faces of Fig. 2.That is to say on the stressed end face of locking cap or drill body or screw etc.Locking plate lower end cylindrical is provided with plurality of sections inclined-plane locked groove 13-2, is used for being connected with locking cap; Locking plate cylindrical bottom is provided with keyway 13-3, is used for being connected with lock sleeve.Form an elastic locking device.The utility model lock sleeve can be an independently intermediate sleeve, also can be connected with protheca, becomes the attached cover of an interlock.
As shown in Figure 7, correspondingly be provided with several elastic claws on the locking cap 15, elastic claw can be along inclined-plane locked groove displacement, the location of locking plate lower end cylindrical, and rolling element 14 is fixed in the groove of locking plate end face.The elastic claw of locking cap 15 is fixed together locking plate 13 and several rolling elements 14.Rolling element 14 can be selected steel ball for use.
The said lock sleeve 11 of the utility model is connected and fixed with locking plate 13 keyways.Fig. 6 is a kind of structural representation of lock sleeve, and as shown in Figure 6, circle top is provided with and connects protruding key 11-1 in the lock sleeve 11, and corresponding with the keyway 13-3 that locking plate cylindrical bottom is provided with, the keyway seamless connectivity is fixed between lock sleeve and the locking plate.Lock sleeve cylindrical middle part also is provided with several protruding key 11-2, and the downside of outer boss key is provided with the opening keyway 11-3 that is used for laying interlock spring 10, and interlock spring 10 is open annular, which is provided with several projectioies, and projection is corresponding with the opening keyway 11-3 of lock sleeve 11.Protheca inside circumference direction is provided with big gap keyway 6-1 accordingly, in order to place interlock spring 10 and lock sleeve 11, as shown in Figure 9.Lock sleeve 11, is realized being synchronized with the movement with protheca and throwing off the structure that comes to this shown in Figure 2 in the side of three the big gap of circumferencial direction keyway 6-1 of protheca 6 by protruding key 11-2 and interlock spring 10 guide-localizations.
The utility model also is provided with actuating sleeve 8 between protheca 6 and screw 3, nut sleeve 9, Fig. 8 is the structural representation of actuating sleeve.Fig. 9, Figure 10 are the structural representations of protheca.As can be seen, the driving key 8-1 of actuating sleeve 8 inserts in the driving groove of screw lower end (belonging to little matched in clearance) from Fig. 8, Fig. 9, Figure 10, and three elastic claw 8-2 of actuating sleeve 8 peripheries cooperate carry-over moment with the driving groove 6-2 of protheca.Circumferential plurality of elastic pawl 8-2 on the actuating sleeve 8 cooperates with the some driving groove 6-2 of protheca and finishes certain moment of torsion, and then pass to screw 3 effectively, driving jaw 4 clamps, after input torque reaches the certain numerical value scope, 8 three elastic claws of actuating sleeve and protheca mating groove are thrown off automatically, screw is not rotating, and throws off back torque transmitting route and changes, and protheca is finished input to locking device by lock sleeve.
Two kinds of new versions have been adopted in the constraint location of the utility model protheca.Protheca 6 bottoms are provided with the collar 7 among Fig. 1, and a straight trough is arranged in the collar 7, and drill body 1 is provided with annular groove, are provided with a jump ring 5 in the annular groove, and the straight trough in the collar 7 cooperates the axial location protheca with the jump ring 5 in drill body 1 annular groove.Protheca 6 bottoms are provided with the collar 7 and baffle ring 5 among Fig. 2, and baffle ring 5 is installed in the drill body annular groove, and the collar 7 and baffle ring 5 are tightly fixed, and protheca can freely rotate, but can not move axially, and like this, can reliably locate protheca.
During the utility model work, rotate protheca 6, drive actuating sleeve 8 and screw 3, make jaw 4 reaches, cutting edge is near the instrument that is held, and the spring 10 that links is simultaneously driven by protheca and rotates synchronously with locking device; After the contact of jaw cutting edge was by the folder tool surfaces, the moment input increased gradually, clamps instrument, and at this moment, interlock spring 10 is thrown off the protheca keyway, and the locking cap 15 in the locking device stops operating because of the increase with drill body 1 end-face friction.After protheca 6 input torques reached the certain numerical value scope, 8 three elastic claws of actuating sleeve and protheca mating groove were thrown off automatically, and screw is not rotating.Behind protheca 6 idle running one low-angle, the short key contacts of the opposite side of the circumferential keyway 6-1 of its endoporus and the cylindrical of lock sleeve 11 middle part, and drive locking plate 13 rotates, locking cap is because of the pressurized transfixion, make rolling element steel ball 14 backscrolling in the end face helicla flute of locking plate 13, by lead angle λ 1 ≠ 0 place, be rolled to during λ 2=0 end face circular arc rises as high as the banks, be in self-locking state.At this moment, three elastic claws of locking cap 15 are also trackslipped to another locked groove by initial locked groove 13-2, the operation principle of locking device is equivalent to a screw the above-mentioned cone that is equal to is equal to again fastening and locking in the taper hole at drill body in this process, this moment, jaw 4 was out of shape with work matching thread strong elastic when screw 3 rotations have upwards taken place to be different from axis of screw 3, with this any trend that rotatablely moves that has stoped screw 3, reliable clamping and locking have been realized thus.
When unclamping, counter-rotating protheca 6, turn over the key of lock sleeve 11 and cooperate idle running, driving lock sleeve 11 makes locking plate 13 locked grooves throw off three elastic claws of locking cap 15, rolling element steel ball 14 is entered into the initial position of λ 1 ≠ 0 by the arc groove of λ 2=0 simultaneously, this moment, three elastic claws of locking cap 15 slipped in the opposite side locking plate side channel, had removed jaw 4 and the axial powerful deformation of screw 3 matching threads thereupon; Three elastic claws of actuating sleeve cooperate drive screw 3 to rotate with the protheca mating groove, unclamp the instrument of being held.
Claims (8)
1, a kind of locking type clamping head of drill, include drill body, jaw, screw, nut sleeve, protheca, the back cover, the drill body rear end is provided with the axial hole that engages with the driving shaft of driven tool, the outside connection with the back cover fixed, three jaws are installed in respectively in the inclined hole of three five equilibriums in the drill body, screw and the jaw engagement that is installed in the drill body inclined hole, it is characterized in that: the outside protheca of drill body, back inner room is provided with lock sleeve, be provided with by locking cap between drill body thrust surface and screw, rolling element, the elastic locking device that locking plate is formed, wherein the locking plate end face is provided with the groove of several band lead angles, rolling element is housed in the groove, the elastic claw of locking cap is fixed together locking plate and several rolling elements, and lock sleeve and locking plate keyway are connected and fixed.
2, locking type clamping head of drill as claimed in claim 1 is characterized in that: said locking plate cylindrical bottom is provided with keyway, and circle top is provided with and connects protruding key in the lock sleeve, and the keyway seamless connectivity is fixed between lock sleeve and the locking plate.
3, locking type clamping head of drill as claimed in claim 1, it is characterized in that: said lock sleeve cylindrical middle part is provided with several protruding keys, the downside of outer boss key is provided with the opening keyway that is used for laying the interlock spring, protheca inside circumference direction is provided with big gap keyway accordingly, and lock sleeve is by linking the spring guide-localization in the protheca keyway.
4, locking type clamping head of drill as claimed in claim 3 is characterized in that: the interlock spring is open annular, which is provided with several projectioies.
5, locking type clamping head of drill as claimed in claim 1, it is characterized in that: locking plate lower end cylindrical is provided with plurality of sections inclined-plane locked groove in the said locking device, correspondingly be provided with several elastic claws on the locking cap, elastic claw can be along inclined-plane locked groove displacement, location, and rolling element is fixed in the groove of locking plate end face.
6, locking type clamping head of drill as claimed in claim 1, it is characterized in that: also be provided with actuating sleeve between protheca and screw, the nut sleeve, the driving key of actuating sleeve inserts in the driving groove of screw lower end, and three elastic claws of actuating sleeve periphery cooperate carry-over moment with the driving groove of protheca.
7, locking type clamping head of drill as claimed in claim 1 is characterized in that: the protheca bottom is provided with the collar and baffle ring, and baffle ring is installed in the drill body annular groove, and the collar and baffle ring are tightly fixed, the location protheca.
8, locking type clamping head of drill as claimed in claim 1 is characterized in that: the protheca bottom is provided with the collar, and a straight trough is arranged in the collar, cooperates the axial location protheca with jump ring in the drill body annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03269053 CN2640667Y (en) | 2003-07-15 | 2003-07-15 | Locking drill chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03269053 CN2640667Y (en) | 2003-07-15 | 2003-07-15 | Locking drill chuck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2640667Y true CN2640667Y (en) | 2004-09-15 |
Family
ID=34299751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03269053 Expired - Lifetime CN2640667Y (en) | 2003-07-15 | 2003-07-15 | Locking drill chuck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2640667Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404177C (en) * | 2003-07-15 | 2008-07-23 | 山东威达机械股份有限公司 | Locking type drill gripping head |
| WO2014019519A1 (en) * | 2012-08-01 | 2014-02-06 | 山东威达机械股份有限公司 | Drill chuck |
| WO2014022987A1 (en) * | 2012-08-08 | 2014-02-13 | 威海达旺五金制品有限责任公司 | Drill chuck |
-
2003
- 2003-07-15 CN CN 03269053 patent/CN2640667Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404177C (en) * | 2003-07-15 | 2008-07-23 | 山东威达机械股份有限公司 | Locking type drill gripping head |
| WO2014019519A1 (en) * | 2012-08-01 | 2014-02-06 | 山东威达机械股份有限公司 | Drill chuck |
| US9744601B2 (en) | 2012-08-01 | 2017-08-29 | Shandong Weida Machinery Co., Ltd | Drill chuck |
| WO2014022987A1 (en) * | 2012-08-08 | 2014-02-13 | 威海达旺五金制品有限责任公司 | Drill chuck |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080723 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |