CN2533968Y

CN2533968Y - Metal drill chuck

Info

Publication number: CN2533968Y
Application number: CN 02209233
Authority: CN
Inventors: 田先明; 苏立航; 徐巧鱼
Original assignee: HUIFENG MACHINERY WORKS SHANGXI
Current assignee: HUIFENG MACHINERY WORKS SHANGXI
Priority date: 2002-04-10
Filing date: 2002-04-10
Publication date: 2003-02-05
Anticipated expiration: 2012-04-10

Abstract

The utility model, belonging to a chuck technical field, is a metal front cap drilling chuck without a spoon, comprising a post cap, an ontology, a bearing, a screw cycle, a clip, a front cap, a retaining cover, etc. The front cap and two halves opening out screw cycles adopt a radical interference coordination, a segment coordination cylindrical surface is processed in a middle part in an inner cavity of the front cap and two planes are distributed in even in one third part of an external diameter surface of the two halves opening out screw cycles of the drilling chuck. The utility model has advantages of simplified art structure and enhanced intensify of the front cap drilling chuck without a spoon.

Description

Cap key-free drill chuck before a kind of metal

Technical field: the utility model belongs to the chuck technical field, relates to the preceding cap key-free drill chuck of a kind of metal.International Patent classificating number is: B23B31/12.

Background technology: the various forms of key-free drill chucks that has produced present home and abroad, generally form by back cap, body, bearing, bung flange, jaw, preceding cap, door etc.Preceding cap wherein mostly is plastic part, common structure is that steel rings is inlayed in the cap inboard before plastics, the two halves of spiral-lock in the body cannelure are split bung flange, and interference is fitted in the steel annular distance that inlay the cap inboard before the plastics, makes two halves split in the cannelure that bung flange is fixed on body.This kind structure more complicated, and also more complicated of production technology, cap intensity is low before the drill chuck, and rapid wear brings a lot of inconvenience in the work.

The utility model content: problem to be solved in the utility model is to simplify process structure, the intensity of cap before the raising key-free drill chuck.

The technical solution of the utility model is: cap key-free drill chuck before a kind of metal, form by back cap, body, bearing, bung flange, jaw, preceding cap, door etc.Split bung flange employing radial interference fit with preceding cap and two halves that die-cast metal or powdered metallurgical material are made, preceding cap inner chamber stage casing is processed with one section and cooperates the face of cylinder.

The utility model can also be further perfect by following steps:

Two halves before a kind of metal in the cap key-free drill chuck are split two planes of symmetrical distribution, 1/3 place, bung flange external diameter surface lower end; Two halves are split the outer triangle that is added with two symmetrical distributions on a surface and an end face of bung flange and are knocked fault trough.

The beneficial effects of the utility model: simplified process structure, improved the intensity of the preceding cap of key-free drill chuck.

Description of drawings: the utility model has 3 width of cloth accompanying drawings, and Fig. 1 is a most preferred embodiment, also can make the accompanying drawing of specification digest.

Fig. 1, be longitudinal profile schematic diagram of the present utility model;

Fig. 2, be the longitudinal profile schematic diagram of cap before the metal shown in Figure 1;

Fig. 3, be bung flange shown in Figure 1 etc. the axle side schematic view.

The specific embodiment: most preferred embodiment of the present utility model is described further below in conjunction with accompanying drawing:

Most preferred embodiment of the present utility model as shown in Figure 1, the cap key-free drill chuck is made up of back cap 1, body 2, bearing 3, bung flange 4, jaw 5, preceding cap 6, door 7 etc. before the metal, preceding cap 6 adopts die-cast metal or powdered metallurgical materials.

As shown in Figure 2, preceding cap 6 inner chamber stage casings are processed with one section and cooperate the face of cylinder 9, and this section height dimension guarantees the length of fit with preceding cap 6, the value of interference fit of radial dimension accuracy guarantee and bung flange 4.Bung flange 4 adopts automatic steel or powdered metallurgical materials, and this material can satisfy the requirement of strength of inside tapered thread tooth, and that can satisfy bung flange again easily knocks disconnected performance requirement.For guaranteeing to be connected with outer the reliable of cap of metal, the outer surface of bung flange 4 is processed into the cylinder mating surface 10 with certain altitude size, this section cylinder mating surface 10 radial dimension precision should satisfy with metal outward the cap inner chamber cooperate the face of cylinder 9 that enough value of interference fit are arranged.

As shown in Figure 3, the triangle that is processed with two symmetrical distributions on the external diameter surface of bung flange 4 and the end face is knocked fault trough 11.According to technologic requirement, 1/3 place, external diameter surface bottom of bung flange 4 is symmetrily processed with two planes 12.

During assembling, cap before the metal 6 and the two halves of spiral-lock in body 2 cannelures are split bung flange 4 interference press-fit.Intensity and the resilient plastic deformability of utilizing metal material itself to have, pass through interference fit, satisfy the preceding cap 6 of metal and 4 requirements that reliably are connected of bung flange, guaranteed the transmission of input torque, adopt electrophoretic paint or anodic process can satisfy versicolor surface requirements again.

Claims

1, cap key-free drill chuck before a kind of metal, form by back cap (1), body (2), bearing (3), bung flange (4), jaw (5), preceding cap (6), door (7) etc., it is characterized in that: split bung flange (4) employing radial interference fit (8) with the preceding cap (6) that die-cast metal or powdered metallurgical material are made with two halves, preceding cap (6) inner chamber stage casing is processed with one section and cooperates the face of cylinder (9).

2, cap key-free drill chuck before a kind of metal according to claim 1 is characterized in that: said two halves are split symmetrical distribution two planes (12), 1/3 place, bung flange (4) external diameter surface lower end.

3, cap key-free drill chuck before a kind of metal according to claim 1 is characterized in that: said two halves are split the outer triangle that is added with two symmetrical distributions on a surface and an end face of bung flange (4) and are knocked fault trough (11).