CN201120476Y

CN201120476Y - Quickly replacing drill chuck

Info

Publication number: CN201120476Y
Application number: CNU2007203030466U
Authority: CN
Inventors: 俞细龙
Original assignee: NINGBO LIXIN HARDWARE CO Ltd
Current assignee: NINGBO LIXIN HARDWARE CO Ltd
Priority date: 2007-12-05
Filing date: 2007-12-05
Publication date: 2008-09-24
Anticipated expiration: 2017-12-05

Abstract

The utility model discloses a quick-change drill chuck comprising a drill chuck shell and a changing shell, a chuck body is in running fit with the center of the inner cavity of a composite unit composed of the drill chuck shell and the changing shell, and the center of the tail end of the chuck body is drilled with a counter bore for locating and nesting an external power shaft; at least four steel balls that can partially run through the counter bore and be snapped with the external power shaft are embedded into the outside diameter of the tail end of the chuck body; clamp rings are in sliding fit with the outside diameter of the tail end of the chuck body for resisting the steel balls, and the clamp rings are fixedly connected with the changing shell; a vertical slot that can clamp and locate the external power shaft is disposed on the tail end face of the chuck body; the connection between the quick-change drill chuck and the external power shaft adopts the steel ball snapping means with simple structure and reasonable design; the quick-change drill chuck is provided with a built-in reset compression spring, so the nesting, opening and closing are flexible and the operation is convenient; and the prefabricated slot for clamping and locating can ensure the synchronous torsion with the external power shaft.

Description

The fast replacing drill chuck

Technical field

The utility model relates to the technical field of drilling attachment in the hardware ﹠ tools, and particularly a kind of fast replacing drill chuck is suitable for the quick changing-over of different drill bits.

Background technology

At present the drill chuck that uses socially adopts the conical surface to connect or thread connecting mode more, and more complicated during the replacing of thread connecting mode is operated consuming time; The operation of conical surface connected mode is comparatively convenient, but two conical surface accuracies of manufacture that requirement is cooperated are higher, and structure is comparatively huge, and is not enough but above dual mode still exists in the quick exchange of drill bit.In the prior art, a kind of drill chuck comparatively easily structure that changes the outfit being arranged also, is the Chinese utility model patent " quick-changing type drill chuck " (notification number is CN2822837Y) of ZL200420013883.1 as the patent No.; Comprise drill body, the drill body rear portion is provided with the axocoel that cooperates with driving device, its rear portion also is provided with the rotatable back cover that axially is positioned, it also is provided with depression bar, the axocoel wall part of drill body is provided with the hole that the voltage supply bar passes through, it also is provided with the back-moving spring of depression bar, and the rear end of depression bar is resisted against on the cover inwall of back, and back cover inwall is provided with the working position of corresponding depression bar and the groove of raw bits.Its assembly structure complexity of depression bar that this design is adopted, comparatively speaking, the corresponding increase of maintenance difficulty; And the easy slippage of roof pressure fastening of depression bar, form potential safety hazard.

Summary of the invention

Technical problem to be solved in the utility model is the present situation at prior art, and a kind of simple in structure, flexible fast replacing drill chuck that reaches simple operation of keying is provided.The slot of prefabricated fastening location is guaranteed and the reversing synchronously of external impetus axle.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: the fast replacing drill chuck, comprise drill point housing and changing-over housing, the assembly lumen centers that drill point housing and changing-over housing the are constituted collet body that has been rotatably assorted, this collet body tail end centre drilling has the counterbore that can locate socket with the external impetus axle mutually; Collet body tail end external diameter be embedded with at least four energy partial penetration counterbores and with the external impetus axle steel ball of snap-on mutually; Collet body tail end external diameter be equipped with can apical grafting the clamp ring of steel ball, and this clamp ring and changing-over housing are fixedly connected; Be shaped on the collet body breech face can with the external impetus axle fasten the location vertical slot.

The measure of taking also comprises:

Above-mentioned collet body tail end external diameter is arranged with the spring of energy roof pressure clamp ring medial surface; Above-mentioned clamp ring lateral surface is spacing the collar that is fixed on the collet body tail end external diameter.

Above-mentioned steel ball is four that are evenly arranged on the same circumferential section; Above-mentioned drill point housing is shaped on the centring ring that can engage with the changing-over housing.

Above-mentioned collet body front end is shaped on three inclined holes, and equal activity is equipped with jaw in each inclined hole, all is shaped on external screw thread on each jaw.

Above-mentioned drill point housing inner chamber through overcoat be fixedly connected with can with the collet body interior flare nut of setting-in mutually; Should in flare nut inner ring be shaped on can with the internal thread that cooperates of spiral mutually of external screw thread on the jaw.

Above-mentioned interior flare nut tail end is fitted with plane bearing, and plane bearing is through retaining ring and drill point housing axial restraint mutually.

Compared with prior art, the utility model has the counterbore that can locate socket with the external impetus axle mutually in the centre drilling of collet body tail end; Collet body tail end external diameter be embedded with at least four energy partial penetration counterbores and with the external impetus axle steel ball of snap-on mutually; Collet body tail end external diameter be equipped with can apical grafting the clamp ring of steel ball, and this clamp ring and changing-over housing are fixedly connected; Be shaped on the collet body breech face can with the external impetus axle fasten the location vertical slot.Advantage of the present utility model is: the fast replacing drill chuck adopts steel ball snap-on mode with being connected of external impetus axle, and is simple in structure, reasonable in design; The compression spring that built-in band resets, socket open and close flexibly, simple operation; The slot of prefabricated fastening location is guaranteed and the reversing synchronously of external impetus axle.

Description of drawings

Fig. 1 is that schematic diagram is vertically partly cutd open in the assembling of the utility model embodiment;

Fig. 2 is the fore-and-aft plane schematic diagram of jaw among Fig. 1;

Fig. 3 is the local enlarged diagram at A place among Fig. 2.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Embodiment as shown in Figure 1 to Figure 3, figure grade explanation: drill point housing 1, centring ring 1a, changing-over housing 2, clamp ring 21, collet body 3, counterbore 3a, slot 3b, collar 31, jaw 32, external screw thread 32a, steel ball 4, spring 5, overcoat 6, interior flare nut 7, plane bearing 8, retaining ring 9.

The fast replacing drill chuck of the utility model embodiment, comprise drill point housing 1 and changing-over housing 2, the assembly lumen centers that drill point housing 1 and changing-over housing 2 the are constituted collet body 3 that has been rotatably assorted, these collet body 3 tail end centre drillings have the counterbore 3a that can locate socket with the external impetus axle mutually; Collet body 3 tail end external diameters be embedded with at least four energy partial penetration counterbore 3a and with the external impetus axle steel ball 4 of snap-on mutually; Collet body 3 tail end external diameters are equipped with the clamp ring 21 of energy apical grafting steel ball 4, and this clamp ring 21 is fixedly connected with changing-over housing 2; Be shaped on collet body 3 breech faces can with the external impetus axle fasten the location vertical slot 3b.

Present embodiment is achieved in that the location of slot 3b is mainly used in the transmission moment of torsion; Also be arranged with compression spring 5 at collet body 3 tail end external diameters, this spring 5 is mainly used in roof pressure clamp ring 21 medial surfaces, and such clamp ring 21 is in the trend of outside slippage always under the roof pressure of spring 5.General clamp ring 21 is shaped on less endoporus near whole drill chuck inside part, is shaped on bigger endoporus near the outside, and when less interior hole site moved to steel ball 4 tops, steel ball 4 at this moment was in the state of holding out against, and promptly steel ball 4 can not become flexible; When bigger interior hole site moved to steel ball 4 tops, the steel ball 4 here was in the state of getting loose, and promptly steel ball 4 can be done freely becoming flexible in the certain space, and simultaneously bigger endoporus must guarantee that steel ball 4 must not drop out; Clamp ring 21 neither be unconfined be outwards moved, and generally sets a collar 31 on collet body 3 tail end external diameters, is mainly used in that clamp ring 21 is outer to move spacingly, and this collar 31 is generally shaft block ring.

The layout of steel ball 4 is generally four that are evenly arranged on the same circumferential section, and the size and the quantity of steel ball 4 can be prepared by reality simultaneously; Collet body 3 front ends are shaped on three inclined holes, and equal activity is equipped with jaw 32 in the inclined hole, all is shaped on external screw thread 32a on each jaw 32; Drill point housing 1 inner chamber through overcoat 6 be fixedly connected with can with the collet body 3 interior flare nut 7 of setting-in mutually; Should in flare nut 7 inner rings be shaped on can with the internal thread that cooperates of spiral mutually of external screw thread 32a on the jaw 32, promptly in flare nut 7 form spirals with each jaw 32 respectively and cooperate.Interior flare nut 7 tail ends are fitted with plane bearing 8, and described plane bearing 8 is through retaining ring 9 and drill point housing 1 axial restraint mutually, and the rotation of flare nut 7 was flexible in plane bearing 8 was beneficial to.Drill point housing 1 is shaped on the centring ring 1a that can engage with changing-over housing 2, and promptly drill point housing 1 and changing-over housing 2 are spiral-locks mutually, have positioning function.Advantage of the present utility model is: the fast replacing drill chuck adopts steel ball snap-on mode with being connected of external impetus axle, and is simple in structure, reasonable in design; The compression spring that built-in band resets, socket open and close flexibly, simple operation; The slot of prefabricated fastening location is guaranteed and the reversing synchronously of external impetus axle.

Most preferred embodiment of the present utility model is illustrated, and various variations or the remodeling made by those of ordinary skills can not break away from scope of the present utility model.

Claims

1, fast replacing drill chuck, comprise drill point housing (1) and changing-over housing (2), it is characterized in that: the assembly lumen centers that described drill point housing (1) and changing-over housing (2) the are constituted collet body (3) that has been rotatably assorted, described collet body (3) tail end centre drilling has the counterbore (3a) that can locate socket with the external impetus axle mutually; Described collet body (3) tail end external diameter be embedded with at least four energy partial penetration counterbores (3a) and with the external impetus axle steel ball of snap-on (4) mutually; Described collet body (3) tail end external diameter is equipped with the clamp ring (21) of energy apical grafting steel ball (4), and this clamp ring (21) is fixedly connected with changing-over housing (2); Be shaped on described collet body (3) breech face can with the external impetus axle fasten the location vertical slot (3b).

2, the described fast replacing drill chuck of root a tree name claim 1 is characterized in that: described collet body (3) tail end external diameter is arranged with the spring (5) of energy roof pressure clamp ring (21) medial surface; Described clamp ring (21) lateral surface is spacing the collar (31) that is fixed on collet body (3) the tail end external diameter.

3, the described fast replacing drill chuck of root a tree name claim 1 is characterized in that: described steel ball (4) is for being evenly arranged in four on the same circumferential section; Described drill point housing (1) is shaped on the centring ring (1a) that can engage with changing-over housing (2).

4, the described fast replacing drill chuck of root a tree name claim 2 is characterized in that: described collet body (3) front end is shaped on three inclined holes, and equal activity is equipped with jaw (32) in each described inclined hole, all is shaped on external screw thread (32a) on each described jaw (32).

5, the described fast replacing drill chuck of root a tree name claim 4 is characterized in that: described drill point housing (1) inner chamber through overcoat (6) be fixedly connected with can with collet body (3) the interior flare nut (7) of setting-in mutually; Flare nut (7) inner ring is shaped on and can goes up external screw thread (32a) internal thread of spiral cooperation mutually with jaw (32) in described.

6, the described fast replacing drill chuck of root a tree name claim 5 is characterized in that: flare nut (7) tail end is fitted with plane bearing (8) in described, and described plane bearing (8) is through retaining ring (9) and drill point housing (1) axial restraint mutually.