CN1954948A

CN1954948A - Drill chuck head

Info

Publication number: CN1954948A
Application number: CNA2006101428676A
Authority: CN
Inventors: H·D·马克
Original assignee: Rohm Co Ltd
Current assignee: Rohm Co Ltd
Priority date: 2005-10-27
Filing date: 2006-10-27
Publication date: 2007-05-02
Anticipated expiration: 2026-10-27
Also published as: DE202005016952U1; CN1954948B

Abstract

The drill chuck has a chuck body (2) connected to a drill spindle. Guide supports (5) and guided clamping jaws (6) are arranged running along the chuck axle (4), and interposing the teeth row (9) of the clamping thread of a clamping ring (10). The drill spindle end of the clamping ring is flanged to an axial locking feature around the radial shoulder (15) of the chuck body for fixing axially forward.

Description

Drill chuck

Technical field

Invention relates to a kind of drill chuck, it has a collet body that can be connected in the rig main shaft, arranged the jaw that can vertically move guiding in the guide type shoe that favours the chuck axis in collet body, they are used in the clamping screw thread of the engaging-in clamping ring of denture separately.

Background technology

Such drill chuck is for example just known by EP 0710518A2, and they prove very outstanding also correspondingly producing in a large number in practice.Therefore always to make great efforts to simplify its processing and assembling, because even slight improvement also can reduce cost significantly for the drill chuck of maturation,, perhaps reduce used element if especially thereby the structure of collet body can be simplified and can save the cutting processing operation.

Summary of the invention

Thereby the task of invention is that design proposes a kind of drill chuck that starts described kind, and its processing and assembling are simplified.

This task is by the present invention's following solving in a kind of drill chuck that starts described kind: flange is forward carried out around the radially convex shoulder corresponding to collet body in the end of the sensing rig main shaft of the axial rearward of clamping ring, is used for axial restraint.

This form of implementation is a kind of very simple and cost-effective scheme, so that make clamping ring with respect to the collet body axial restraint, thisly fixing can bear big load enduringly and the manufacturing cost very economical is favourable.Connect at clamping ring and a kind of real form fit of radially just having realized between the convex shoulder that is matched with collet body like this, therefore, when impacting drilling, there is the strong vibration of part can not make connection between clamping ring and the convex shoulder loosening or even get loose even load when drilling, occurs.

Particularly preferably be in the scope of the invention: convex shoulder designs on a terminal bay that is supported on the collet body, because like this clamping ring just can have a big radial opening size, and collet body needn't be processed into by comparable thick circle material because the terminal bay cross-over connection spacing between the internal diameter of the external diameter of collet body and clamping ring.

In addition preferably: clamping ring is made of with a closing sleeve that is connected with threaded collar transmitting torque ground a threaded collar, and the end of the axial rearward of sleeve is enclosed and blocked convex shoulder, and closing sleeve axially locks threaded collar forward.Even also must be pointed out in this form of implementation: the clamping ring that constitutes by separated into two parts just can carry out the last assembling of drill chuck around the convex shoulder crimping, and all are lived with respect to the rotatable element axial restraint of collet body.About what this respect had proved already be: threaded collar axially is bearing on the collet body backward by a pressure rings and/or ball bearing, because can realize higher clamping force like this.It should be appreciated that: even concerning a kind of drill chuck of this spline structure, also do not make assembling more difficult, because unique axial locking also is to realize by the flange of clamping ring.

If especially threaded collar makes whole threaded collar, this threaded collar needn't be enclosed in the cannelure on the circumferencial direction that is arranged in collet body, that just can only assemble collet body by a kind of plug-in assembling, wherein at first axially push in the closing sleeve from behind threaded collar, and closing sleeve is inserted on the collet body from the front cover, can only deposits by flange until terminal bay.Particularly preferably be fully: the wall thickness dimension of determining terminal bay, make it that a kind of spring action can be provided, because so just can flexibly work to the load that is occurred, if especially these load occur on one side, therefore closing sleeve is around the not harm of existing in a circumferential direction crimping of terminal bay, even drill chuck is fallen words on the ground with rig.

In addition preferably: terminal bay axially has been offset forward when flange, because so just realize the permanent clamping of terminal bay, if terminal bay wants to be back to its initial position, so this clamping has just produced closing sleeve compressing with the threaded collar axial rearward.

If threaded collar and closing sleeve are made of metal, preferentially constitute, but drill chuck just has extra high load so by steel, the precedence of crimping was more prone to when wherein this material was selected also to make assembling especially.

Be also pointed out that: in order to realize and invent the advantage that interrelates, the convex shoulder individualism might not be arranged, because this convex shoulder also can constitute by the sidewall of a groove, that is to say when the material that makes clamping ring when crimping is sinking in the groove towards the convex shoulder of the axial sensing front of groove and crimping.

A kind of form fit when axially locking threaded collar connects and can reach simply by following: closing sleeve has a kind of taper, and the axial front of threaded collar is attached on its side.

Description of drawings

Below by embodiment shown in the drawings invention is elaborated.Accompanying drawing is depicted as:

Fig. 1: a kind of side view according to drill chuck of the present invention, the left side is for vertically analysing and observe;

Fig. 2 a: side view of drill chuck shown in Figure 1, just local freely expression with cutting.

The specific embodiment

Accompanying drawing is represented a drill chuck 1 with collet body 2, collet body 2 its axially backward the end spindle drum 3 is arranged, make drill chuck 1 can be fixed on one in the drawings on the rig main shaft of unshowned rig with this spindle drum.Also jaw 6 is vertically led movably for 2 li at collet body 5 li of the guide holders that favours chuck axis 4, jaw enters into 7 li of the tool seat of the axial forward end of being located at collet body 2, wherein jaw 6 has the sword 8 of clamping in inboard radially, and have the clamping screw thread that denture 9 is used for engaging-in clamping ring 10 at radial outside, clamping ring makes two parts in the illustrated embodiment, a closing sleeve 11 and a threaded collar 12 are arranged, their carry-over moments ground connects, contact by direct form fit connection, as shown in the figure, or pass through by the known mode of EP 0710518A.Threaded collar 12 axially is bearing in backward on the collet body 2 and axially by a ball bearing 13 and a pressure rings 14 and onwards fixes by the tapering of closing sleeve 11, and threaded collar 12 axial fronts abut on its side.Closing sleeve 11 axial restraints own carry out by the following: the end of the sensing rig main shaft of the axial rearward of closing sleeve 11 is around radially convex shoulder 15 turnups corresponding to collet body 2, wherein this convex shoulder 15 designs in the illustrated embodiment on a terminal bay (Abschlu β scheibe) 16, that is to say that convex shoulder 15 needn't be connected in aggregates with collet body 2.

Determine the wall thickness of terminal bay 16, make it that a kind of spring action can be provided, when turnup, make terminal bay 16 axially be offset closing sleeve 11 forward with respect to a kind of lasting clamping of collet body 2 realizations if therefore make.The threaded collar 12 that work is integral equally also is made of steel as closing sleeve 11.

Drill chuck 1 for a kind of this spline structure has just provided a kind of very simple assembly method, promptly by a kind of inexpensive all rotating parts of axial restraint simply, has also realized the accurate radial and axial supporting of closing sleeve 11 thus.This has just realized very high payload security and very big wearability, because the connection between closing sleeve 11 and the convex shoulder 15 is carried and damage is insensitive for outer.Especially also following advantage can be arranged: can realize little external diameter for drill chuck 1, this just by jaw 6 on its extreme position that returns and the external envelope of the wall thickness of clamping ring 10 circle determine.

Claims

1. drill chuck, has the collet body (2) that can be connected on the rig main shaft, put the jaw (6) that can vertically move guiding in the guide type shoe that favours chuck axis (4) (5) lining at the collet body lining, in the clamping screw thread of jaw with the engaging-in clamping ring of denture (9) (10) separately, it is characterized in that, the end of the sensing rig main shaft of the axial rearward of clamping ring (10) around corresponding to the radially convex shoulder (15) of collet body (2) forward flange be used for axial restraint.

2. by the described drill chuck of claim 1, it is characterized in that convex shoulder (15) designs on the terminal bay (16) that is supported on the collet body (2).

3. by claim 1 or 2 described drill chucks, it is characterized in that clamping ring (10) is made of with the closing sleeve (11) that is connected with threaded collar (12) transmitting torque ground threaded collar (12), the end of the axial rearward of closing sleeve is enclosed and is blocked convex shoulder (15); And closing sleeve (11) axially locks threaded collar (12) forward.

4. by the described drill chuck of claim 3, it is characterized in that threaded collar (12) axially is bearing on the collet body (2) backward by pressure rings (14) and/or ball bearing (13).

5. by claim 3 or 4 described drill chucks, it is characterized in that threaded collar (12) is designed to whole threaded collar (12).

6. by described drill chuck one of in the claim 2 to 5, it is characterized in that, determine the wall thickness of terminal bay (15), make terminal bay that a kind of spring action can be provided.

7. by the described drill chuck of claim 6, it is characterized in that terminal bay when flange (15) is skew forward axially.

8. by described drill chuck one of in the claim 3 to 7, it is characterized in that threaded collar (12) and closing sleeve (11) preferentially are made of steel metal.

9. by described drill chuck one of in the claim 1 to 8, it is characterized in that convex shoulder (15) is made of the sidewall of groove.

10. by described drill chuck one of in the claim 3 to 9, it is characterized in that closing sleeve (11) has tapering, threaded collar (12) axially is closely attached on forward on its side.