CN1204989C

CN1204989C - Chuck

Info

Publication number: CN1204989C
Application number: CN 00126016
Authority: CN
Inventors: G·H·罗姆
Original assignee: Rohm Co Ltd
Current assignee: Rohm Co Ltd
Priority date: 2000-08-18
Filing date: 2000-08-18
Publication date: 2005-06-08
Anticipated expiration: 2020-08-18
Also published as: CN1338344A

Abstract

The present invention relates to a drill chuck which is provided with a chuck body with a back end body section and a front end body section which are provided with main shaft containing holes, wherein a guiding hole tilted to a clamp pawl extending along the shaft line of the drill chuck is made on the chuck body. A gap of a ratchet wheel is positioned on a bearing ring for axially and backwards supporting a clamping ring, the bearing ring and the clamping ring are both processed into weakened and independent members, and have inner diameters larger than the outer diameter of the axial front end body section, the clamping ring is supported on a gasket supported on a clamping sleeve, and the clamping sleeve is axially and forwards supported chuck body through a clamp buckle.

Description

Drill chuck head

Technical field

The present invention relates to a kind of drill chuck head, have and on its axial rearward end body section, have the dop body that main shaft holds the hole and have cutter appearance hole on its axial forward end body section, make the claw pilot hole that favours the extension of dop axis in dop body the inside, claw imbeds the clamping screw thread the inside of clamping ring by engagement, abut against on the clamping ring to the antitorque commentaries on classics of packing ring, drill chuck head has the rotating gripping sleeve that is used to adjust clamping ring and is subject to packing ring in addition, also have the brake apparatus between gripping sleeve and dop body, this device is made up of the wheel rim in ratchet space and the braking member that can move between ratchet space engagement state and ratchet space disengaged condition.

Background technology

The for example known and process test in practice of the drill chuck head of this form by EP 0 785 041 A1, because they have easy relatively structure, and can only just can be clamped and locked by gripping sleeve rotation drill chuck head continuously in one direction, in boring procedure, unclamp preventing.For the on purpose released need of clamped drilling tool are rotated gripping sleeve in the opposite direction, the therefore operation that this known drill chuck head can be easy and also can be in the household appliance field by the use of safety.These advantages make this drill chuck head have application more and more widely, not only on high-power drilling machine, use, and with small-power or battery-driven drilling machine or to bore rifle supporting.Produce the constraint of cost burden thus, drill chuck head may be made at an easy rate.

Summary of the invention

Therefore task of the present invention is, further improves the drill chuck head of above-mentioned form, makes it possible to reduce the total cost that its parts are made and assembled.

Is to solve like this according to this task of the present invention for the drill chuck head of above-mentioned form, the ratchet space is positioned at and is used for the bearer ring that clamping ring axially supports backward, bearer ring and clamping ring all are processed to not weakened, independent parts and have internal diameter greater than axial forward end body section external diameter, bearer ring has connecting plate, and this connecting plate meshes the into pilot hole the inside of claw.

This drill chuck head at first has such advantage, the manufacture simplification of dop body, because at first needn't on its front end body section, process the ratchet space, secondly dop body its front end body section have simple structure, columniform profile basically, the processing of less smear metal can be processed and only be needed to this profile easily.This simple profile can combine with the ratchet space that is attached to bearer ring and by the clamping ring of packing ring and the axially mounting of bearer ring, whole drill chuck head can be assembled by easy insertion operation, be linked and packed as the end of inserting operation with the buckle between gripping sleeve and the dop body at this, and needn't after this pure axial insert action, add assembling relieving ring or like again.

Distinguishedly according to drill chuck head of the present invention in addition be, gripping sleeve has and adapts to front end body locating surface segment structure and that be used for radially-directed, and extend back in the axial direction pilot hole until claw of this locating surface stretches out in by the dop body.Improve gripping sleeve and at first can realize for this with the structure of its associated components radially-directed, needn't be again make ratchet space and packing ring on the axial forward end body section also can be shorter in its length on axially, also demonstrate the cost advantage in addition.

Proved already advantageously that buckle connected that to constitute by latch be practical, latch imbeds the groove the inside that front end body section along the circumferential direction extends and is arranged on the gripping sleeve incision.In a circumferential direction the groove of Yan Shening can from make in axial forward end body section buckle connect necessary numerous structure with the easiest and the most at an easy rate mode make, this this groove and one or preferably a plurality ofly concur at the latch of branch settings such as periphery equably, on gripping sleeve, must form corresponding gripping sleeve otch, so that when inserting, can temporarily be retracted into groove before the fast threading dop body for this reason.

The necessary axially mounting of clamping ring realizes thus that in the easiest mode promptly packing ring has the supporting of ring-type convex shoulder as clamping ring.

Within the scope of the invention according to another embodiment, in the axial rearward end portion of dop body closing cap is set, this closing cap is used for the radially-directed of gripping sleeve.Except guarantee another radially-directed than major diameter gripping sleeve other end in the axial direction to spigot surface by closing cap on axial forward end body section, therefore being directed at is very reliable on the whole.

Practical mode is that closing cap also is axially fixed on the dop body by a buckle connection.This buckle connection has such advantage, can abandon at present the annular knurl on dop body and closing cap of employing usually, and the essential high accuracy of this annular knurl is processed, and needs the instrument that adds for this reason and prolongs process time on the whole.

Relevant therewith being proved to be advantageously is provided with annular groove and next-door neighbour's convex shoulder on the rear end element section, closing cap has and adapts to ring convex shoulder structure and that imbed annular groove, and this ring can bounce back before cell wall and puts into annular groove owing to being arranged on perforate on the closing cap.

In addition within the scope of the invention, bearer ring has connecting plate, and this connecting plate meshes the into pilot hole the inside of claw.When bearer ring also was the parts of brake apparatus simultaneously, wherein this connecting plate should guarantee to stop gripping sleeve rotation in a circumferential direction, essential assurance, and bearer ring can not move on the dop body.Advance the connecting plate of pilot hole by engagement and can realize this point exactly.

This connecting plate also has other advantage, when connecting plate when axially extending forward and having the spigot surface of claw, can reduce the slit of claw in pilot hole thus.

Description of drawings

Explain the present invention in detail below by illustrated embodiment, be illustrated as:

Fig. 1 is according to drill chuck head of the present invention, and the left side is an axial section, and the right side is a side view,

II-II cross section among Fig. 2 Fig. 1, wherein brake apparatus is for deviating from the position,

Fig. 3 is corresponding to the cross section of Fig. 2, and wherein brake apparatus is engaging-in position,

IV-IV cross section among Fig. 4 Fig. 1 has the packing ring stop block of the gripping sleeve groove of advancing by leaps and bounds,

V-V cross section among Fig. 5 Fig. 1 has the vertical view of latch, and latch imbeds the groove the inside of extending on dop body circumferencial direction.

The specific embodiment

Drill chuck head shown in the figure has dop body 1, the dop body has axial rearward end body section 2 and front end body section 4, in the rear end element section, make the main shaft that is used to connect the drill press spindle that does not draw in the drawings and hold hole 3, in front end body section, make cutter and hold hole 5, pilot hole 7 favours dop axis 6 and stretches in the cutter appearance hole, can be used to clamp the drilling tool that does not draw equally in the drawings at the claw 8 that pilot hole vertically moves.Main shaft holds hole 3 and cutter and holds hole 5 and interconnect by axially extending bore 9, and the effect of this through hole is, hammer action can directly act on the pommel of drill bit when introducing axially movable hammering head that is used for the hammer drill operation or bump on auger axis.

Claw 8 is by meshing the 10 clamping screw thread the insides of imbedding clamping ring 11, clamping ring can not move axially on dop body 1 and turn, and, move in its pilot hole 7 the insides at this claw 8 in order to clamp and to unclamp drill chuck head and can rotate for dop body 1 with palmistry by means of the gripping sleeve 12 that cannot move equally.Moving of the claw of not expecting in order to prevent 8, the turned position of clamping ring 11 can be fixed.Make brake apparatus 13 between clamping ring 11 and dop body 1, brake apparatus is made up of coaxial wheel rim 14 and at least one braking member 15 in ratchet space for this reason, braking member under the effect of spring force basically radially stick into ratchet space 14 from outside to inside.Braking member 15 can be adjusted between its ratchet space 14 engagement states (Fig. 3) and ratchet space 14 disengaged condition (Fig. 2), for this reason braking member 15 can by an adjustment curve 17 that on gripping sleeve 12 inwalls 16, forms adjust and correspondingly gripping sleeve 12 can rotate with respect to clamping ring 11.This gripping sleeve 12 is defined with respect to rotation shape on two rotation directions of clamping ring 11 sealedly, dispose packing ring 18 for this reason, this packing ring is antitorque change ground be connected with clamping ring 11 also can be limited with respect to gripping sleeve 12 rotation, wherein rotate and configuration stop block 19 in order to limit, stop block sticks into the dead slot 20 on the gripping sleeve 12, this stop block 19 two end points of carryover respectively with dead slot 20 boundary end face 21 in a circumferential direction in one carry out backstop.For the radially-directed that makes gripping sleeve 12 not only works by packing ring 18, gripping sleeve 12 has and adapts to front end body section locating surface 22 4 and that be used for radially-directed, and the pilot hole 7 that this locating surface extends back on axially until claw 8 stretches out for 1 li from the dop body.

In order to realize this point, brake apparatus 13 not only is arranged on the axial forward end of dop body 1, and axially extends back, and be positioned on the bearer ring 23 that axially supports backward as clamping ring 11 in this ratchet space 14, so this bearer ring is being born multiple function.For the reliability that guarantees brake apparatus 13 functions and prevent that bearer ring 23 from moving on dop body 1 circumferencial direction, make connecting plate 24 on bearer ring 23, connecting plate meshes the pilot hole 7 of claw 8 into and prevents to rotate simultaneously because its axial enough forward extended distance is set up the spigot surface of claw 8.

Bearer ring 23 and clamping ring 11 all have the internal diameter greater than axial forward end body section 4 external diameters, make that these rings can be that the whole whole drill chuck head that also can make is assembled by easy insertion operation.Be connected with buckle between the dop body 1 and guarantee by being made in gripping sleeve 12 in the axial reliability of this insertion operating condition lower member, buckle connects the latch 25 that is arranged on the gripping sleeve 12 by a plurality of uniform five equilibriums to be realized, latch imbeds groove 26 the insides of along the circumferential direction upward extending on the front end body section 4 of dop body 1, makes latch be arranged on gripping sleeve otch 27 places at this in order to make latch 25 when injecting dop body 1 temporary transient retraction be arranged.For axially mounting and as the supporting of clamping ring 11, packing ring 18 has ring-type convex shoulder 28 in addition.

Be provided with one in the axial rearward end of dop body 1 and connect the closing cap 29 that is axially fixed on the dop body 1 by buckle, this closing cap is as the radially-directed of gripping sleeve 12.Buckle connects to be made like this, on the rear end element section, make annular groove 30 and next-door neighbour's convex shoulder 31, wherein closing cap 29 has and adapts to ring 32 convex shoulder 31 structures and that stick into annular groove 30, and this ring is owing to be arranged on perforate 33 on the closing cap 29 and can bounce back before cell wall and put into annular groove 30.

Claims

1. drill chuck head has the dop body (1) that has main shaft appearance hole (3) and have cutter appearance hole (5) on its axial rearward end body section (2) on its axial forward end body section (4), on the dop body, make the pilot hole (7) of the claw (8) that favours dop axis (6) extension, claw imbeds the clamping screw thread the inside of clamping ring (11) by engagement (10), abut against on the clamping ring to the antitorque commentaries on classics of packing ring (18), drill chuck head has and is used to the rotating gripping sleeve (12) adjusting clamping ring (11) and be subject to packing ring (18) in addition, also have the brake apparatus (13) that is made between gripping sleeve (12) and the dop body (1), this device is made up of the wheel rim of ratchet space (14) and the braking member (15) that can move between ratchet space (14) engagement state and ratchet space (14) disengaged condition, it is characterized by, ratchet space (14) is positioned at and is used for the bearer ring (23) that clamping ring (11) axially supports backward, bearer ring (23) and clamping ring (11) all are processed to not weakened, independent parts also have internal diameter greater than axial forward end body section (4) external diameter, bearer ring (23) has connecting plate (24), and this connecting plate meshes into pilot hole (7) the inside of claw (8).

2. drill chuck head as claimed in claim 1 is characterized by, and clamping ring (11) is bearing on the packing ring (18), and packing ring is bearing on the gripping sleeve (12), and gripping sleeve by the buckle connecting axle to being bearing in forward on the dop body (1).

3. drill chuck head as claimed in claim 2, it is characterized by, gripping sleeve (12) has and adapts to front end body section locating surface (4) and that be used for radially-directed (22), and this locating surface extends back in the axial direction and stretched out by dop body (1) lining until the pilot hole of claw (8) (7).

4. drill chuck head as claimed in claim 2 is characterized by, and buckle connects to be made by latch (25), and latch imbeds inside the groove (26) that front end body section (4) along the circumferential direction extends and is arranged on gripping sleeve otch (27) to be located.

5. drill chuck head as claimed in claim 4 is characterized by, and has a plurality of latch (25) that are provided with at branches such as peripheries uniformly.

6. drill chuck head as claimed in claim 1 is characterized by, and packing ring (18) has the supporting of ring-type convex shoulder (28) as clamping ring (11).

7. drill chuck head as claimed in claim 1 is characterized by, and in the axial rearward end portion of dop body (1) closing cap (29) is set, and this closing cap is used for the radially-directed of gripping sleeve (12).

8. drill chuck head as claimed in claim 7 is characterized by, and closing cap (29) is axially fixed on the dop body (1) by the buckle connection.

9. drill chuck head as claimed in claim 8, it is characterized by, annular groove (30) and next-door neighbour's convex shoulder (31) is arranged on the rear end element section (2), closing cap (29) has and adapts to ring (32) convex shoulder (31) and that stick into annular groove (30), and this ring is owing to be arranged on perforate (33) on the closing cap (29) and can bounce back before cell wall and put into annular groove (30).

10. drill chuck head as claimed in claim 1 is characterized by, and connecting plate (24) is axially extending forward and having a spigot surface that is used for claw (8).