CN206104971U

CN206104971U - Drill chuck

Info

Publication number: CN206104971U
Application number: CN201621160718.8U
Authority: CN
Inventors: 魏宁波; 蔡鸣泉
Original assignee: Shandong Weida Machinery Co Ltd
Current assignee: Shandong Weida Machinery Co Ltd
Priority date: 2016-11-01
Filing date: 2016-11-01
Publication date: 2017-04-19
Anticipated expiration: 2026-11-01

Abstract

The utility model provides a drill chuck, it has solved current drill chuck in the use, because the diameter runout of bush and overcoat assembly, make screw and screw cover assembly radial offset, cause clamping jaw screw thread and screw screw thread to thread off, the very difficult technical problem who guarantees the processing continuity, it is equipped with and bores the body, the clamping jaw, the screw, a bearing, the ratchet, the screw cover, the shell fragment, the bush, the overcoat, and a front cover, the jump ring, on the prior art drill chuck basis, bore the support cover that body rear portion still was equipped with the annular structure, it sets up between the brill body and bush to support the cover, support the cover and bore body interference fit and coaxial, the support cover closely cooperates with the bush and but the axial is rotated relatively, but wide application in drilling tool technical field.

Description

A kind of drill chuck

Technical field

This utility model is related to drilling tool technical field, more particularly to a kind of drill chuck.

Background technology

Drill chuck is one of key fitment of Power Tools Industries and machine industry, is widely used in electric hand drill, drilling machine etc. On, match with electric drill, for clamping a kind of instrument of the work head such as drilling tool.

In prior art, there is a type of drill chuck to be provided with drill body, jaw, protecgulum, bushing, screw, nut sleeve, bullet Piece, overcoat, jump ring, bearing, ratchet, wherein three jaws are separately positioned in three inclined holes being distributed on drill body, screw with Jaw drives nut sleeve by bushing using threaded connection by rotary sleeve, makes screw rotation so as to drive jaw in inclined hole Clamp since turnover or release fixture.Such drill chuck shortcoming is：In use, due to bushing and outer set group Fit circular runout, makes screw and nut sleeve assembly radial deflection, causes jaw screw thread to thread off with screw screw thread, it is difficult to protect The successional problem of card processing.

The content of the invention

The purpose of this utility model is for the deficiency for solving above-mentioned technology, there is provided a kind of to reduce bushing and overcoat assembly Circular runout, the radial deflection of effective control screw and nut sleeve assembly makes jaw screw thread be difficult to thread off with screw screw thread, Ensure the successional drill chuck of processing.

For this purpose, this utility model provides a kind of drill chuck, its be provided with drill body, jaw, screw, bearing, ratchet, nut sleeve, Shell fragment, bushing, overcoat, protecgulum, jump ring, jaw are respectively arranged in the inclined hole being uniformly distributed circumferentially on drill body, screw with Jaw is using threaded connection；In support slot of the bearing positioned at the cross section of screw rear end face for L-shaped, between bearing and drill body end face Ratchet is provided with, nut sleeve is fixedly connected with screw, shell fragment is placed in the shell fragment fixing hole of nut sleeve, the ratchet phase of shell fragment and ratchet Mutually coordinate；The medium position of bushing is fastened on nut sleeve, and bushing is fixedly connected with overcoat, and overcoat front portion is fixedly installed protecgulum, Protecgulum top is fixed on drill body by jump ring；Drill body rear portion is additionally provided with the support set of circulus, and support is set on drill body Between bushing, support set is with drill body interference fit and coaxial, and support set is fitted close and axially opposing can be rotated with bushing.

Preferably, support set is convex circulus, and sleeve is inserted in the narrower port of support set.

Preferably, the rear portion of support set is also fixed with the pad of circulus.

Preferably, support set is fixed with pad and is connected.

The beneficial effects of the utility model are：This utility model provides a kind of drill chuck, installs additional between drill body and bushing Support set, support set are fixed with drill body interference fit, and support set is fitted close with bushing, axially opposing can be rotated, radial positioning Bushing and the assembly of overcoat, reduce the circular runout of bushing and overcoat assembly, and effective control screw is combined with nut sleeve The radial deflection of body, makes jaw screw thread be difficult to thread off with screw screw thread, it is ensured that the seriality of processing.

Description of the drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2-1 is the axonometric chart of support set of the present utility model.

Fig. 2-2 is the front view of support set of the present utility model.

Fig. 3-1 is the front view of pad of the present utility model.

Fig. 3-2 is the top view of pad of the present utility model.

Fig. 3-3 is the axonometric chart of pad of the present utility model.

Labelling in figure：1. drill body, 2. jaw, 3. screw, 4. bearing, 5. ratchet, 6. nut sleeve, 7. shell fragment, 8. bushing, 9. Overcoat, 10. protecgulum, 11. jump rings, 12. support sets, 13. pads.

Specific embodiment

The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings, to help understanding this utility model Content.

By shown in Fig. 1, Fig. 2, Fig. 3, this utility model provides a kind of drill chuck, and which is provided with drill body 1, jaw 2, screw 3, axle 4, ratchet 5, nut sleeve 6, shell fragment 7, bushing 8, overcoat 9, protecgulum 10, jump ring 11 are held, support set 12, pad 13 is additionally provided with.

This utility model corresponded by multiple jaws 2 respectively be arranged on drill body 1 be uniformly distributed circumferentially it is multiple In inclined hole, screw 3 is adopted with jaw 2 and is threadedly coupled；In support slot of the bearing 4 positioned at the cross section of 3 rear end face of screw for L-shaped, Ratchet 5 is provided between 1 end face of bearing 4 and drill body, nut sleeve 6 is fixedly connected with screw 3, the shell fragment that shell fragment 7 is placed in nut sleeve 6 is solid Determine in hole, shell fragment 7 is cooperated with the ratchet of ratchet 5；The medium position of bushing 8 is fastened on nut sleeve 6, bushing 8 and overcoat 9 It is fixedly connected, 9 front portion of overcoat is fixedly installed protecgulum 10,10 top of protecgulum is fixed on drill body 1 by jump ring 11.

1 rear portion of drill body is additionally provided with the support set 12 of convex circulus, and support set 12 is arranged between drill body 1 and bushing 8, Support set 12 is with 1 interference fit of drill body and coaxial, narrower port 8 bottom of insertion bushing of support set 12, closely matches somebody with somebody with bushing 8 Merging axially opposing can be rotated, can radial positioning bushing 8, reduce the circular runout of bushing 8 and 9 assembly of overcoat, effectively Control screw 3 and the radial deflection of 6 assembly of nut sleeve, make 2 screw thread of jaw be difficult to thread off with 3 screw thread of screw, it is ensured that processing Seriality.

The rear portion of support set 12 is also fixed and is provided with the pad 13 of circulus, and support set 12 is close with what pad 13 was formed Space is closed, can be embedded in the gear-box of the electric tools such as electric drill, drilling machine, coordinated with electric tool gearbox, form gear-box A part for body, reduces the volume and weight of electric tool and drill chuck, improves electric tool performance.

This utility model drill point head clamping releases the principle of fixture, be by rotary sleeve 9, by with 9 company of fixation of overcoat The bushing 8 for connecing drives nut sleeve 6, rotates the screw 3 being fixedly connected with nut sleeve 6, so as to drive what is be threadedly coupled with screw 3 Jaw 2 is passed in and out in 1 inclined hole of drill body, is realized clamping or is released fixture, assembles bushing 8, effectively solve work in prior art When making, 9 tail end of overcoat swings back and forth.At present the drill chuck of the type when in use, drilling bit high-speed rotary, 1 rear portion of drill body and bushing Gap between 8 makes bushing 8 and 9 assembly circular runout of overcoat, and then screw 3 is occurred radially partially with 6 assembly of nut sleeve Move, cause 2 screw thread of jaw to thread off with 3 screw thread of screw, it is difficult to ensure that processing seriality.This utility model is exactly based in drill body 1 Support set 12 is set between rear portion and bushing 8, above-mentioned technical problem is effectively solved.

Only as described above, only specific embodiment of the utility model, when this utility model can not be limited with this The scope of enforcement, therefore the displacement of its equivalent assemblies, or the equivalent variations made according to this utility model scope of patent protection and modification, All should still belong to the category that this utility model claims are covered.

Claims

1. a kind of drill chuck, which is provided with drill body (1), jaw (2), screw (3), bearing (4), ratchet (5), nut sleeve (6), shell fragment (7), bushing (8), overcoat (9), protecgulum (10), jump ring (11), the jaw (2) are respectively arranged at the edge on the drill body (1) In circumferential equally distributed inclined hole, the screw (3) is adopted with the jaw (2) and is threadedly coupled；The bearing (4) is positioned at described During the cross section of screw (3) rear end face is for the support slot of L-shaped, between the bearing (4) and the drill body (1) end face, it is provided with described Ratchet (5), the nut sleeve (6) are fixedly connected with the screw (3), and the shell fragment (7) is placed in the shell fragment of the nut sleeve (6) In fixing hole, the shell fragment (7) is cooperated with the ratchet of the ratchet (5)；The medium position of the bushing (8) is fastened on institute State on nut sleeve (6), the bushing (8) is fixedly connected with the overcoat (9), overcoat (9) front portion be fixedly installed it is described before Lid (10), protecgulum (10) top are fixed on the drill body (1) by the jump ring (11), it is characterised in that be additionally provided with The support set (12) of circulus, the support set (12) are arranged on institute located at the drill body (1) rear portion, the support set (12) State between drill body (1) and the bushing (8), the support set (12) is with the drill body (1) interference fit and coaxial, described Support set (12) is fitted close and axially opposing can be rotated with the bushing (8).

2. a kind of drill chuck according to claim 1, it is characterised in that the support set (12) is convex circulus, Insert bushing (8) bottom in the narrower port of the support set (12).

3. a kind of drill chuck according to any one of claims 1 or 2, it is characterised in that after the support set (12) Portion is also fixed with the pad (13) of circulus.

4. a kind of drill chuck according to claim 3, it is characterised in that the support set (12) and the pad (13) card Conjunction is fixedly connected.