CN208662556U - A kind of drill chuck - Google Patents

Abstract

The utility model provides a kind of drill chuck, which solve the lower technical problems of existing drill chuck security performance and precision, it is equipped with drill body, clamping jaw, housing, screw, three clamping jaws are respectively arranged in three be uniformly distributed circumferentially the inclined hole on drill body, screw is used with clamping jaw and is threadedly coupled, housing is fixedly connected with screw, drill body back end circumference is equipped with through-hole, positioning key is equipped with inside through-hole, outer casing inner wall circumference is equipped with groove corresponding with positioning key, positioning key generates radial deflection in through-hole when drill body rotates, it is displaced to positioning key in outer casing inner wall groove, housing is subjected to axially position, the utility model can be widely applied to drilling tool technical field.

Description

A kind of drill chuck

Technical field

The utility model relates to drilling tool technical fields, more particularly, to a kind of drill chuck.

Background technique

Drill chuck is one of the 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 tool of the work heads such as drilling tool, existing drill chuck is generally by drill body, clamping jaw, silk Female, housing composition, clamping jaw are separately mounted in the equal part inclined hole of drill body, and screw is mounted in the screw slot of drill body, screw and folder The screw thread of pawl forms thread transmission, and housing and screw, drill body are fixedly connected, and there are threaded hole or taper hole in drill body rear portion, installation In use, the threaded hole or taper hole at drill body rear portion and the transmission axis connection of power equipment, driving drill body is driven when transmission shaft rotates Clamping jaw and folded tool rotate synchronously.

However drill chuck is after a period of work, housing and screw are interference fit, and abrasion easily occurs so that magnitude of interference subtracts It is small, cause housing that axial dipole field occurs, falls off, collet housing is in the case where high speed rotation direction, the security risk for having abjection to hurt sb.'s feelings, Influence the normal use of collet；And after drill chuck clamping jaw closure when being hit, impact force is transmitted to clamping jaw screw thread position, holds When easily causing the damage of clamping jaw screw thread position, collet failure phenomenon, while hitting, the ligament position of handle kind tool can be clamped to clamping jaw It damages, influences clamp precision.

Summary of the invention

The utility model technical problem lower aiming at existing drill chuck security performance and precision, provides a kind of safety Performance and the higher drill chuck of precision.

For this purpose, the utility model be equipped with drill body, clamping jaw, housing, screw, three clamping jaws be respectively arranged on drill body along week Into equally distributed three inclined holes, screw is with clamping jaw using being threadedly coupled, and housing is fixedly connected with screw, drill body back end circumference It is equipped with through-hole, positioning key is equipped with inside through-hole, outer casing inner wall circumference is equipped with groove corresponding with positioning key, drill body rotation Positioning key generates radial deflection in Shi Tongkong, is displaced to positioning key in outer casing inner wall groove, housing is carried out axially position.

Preferably, positioning key is steel ball.

Preferably, positioning key is flat key.

Preferably, the outer domed end of clamping jaw front end is equipped with inclination angle, angle between inclination angle and clamping jaw axial direction be greater than outer circle with Angle between clamping jaw axial direction.

Preferably, clamping jaw top is equipped with circular hole, is equipped with neonychium at circular hole.

Preferably, protection cushion material is rubber.

The utility model structure is simple, by the way that positioning key is arranged on drill body, carries out housing axially in rotary work Positioning, can not shift and fall off, and enhance service life and the stability of drill chuck, and it is inclined to eliminate housing present in use process Shifting falls off；By the change of clamping jaw front end ligament angle, clamping jaw front end forced area is reduced, protects clamping jaw ligament, forced area It reduces, when making impact with the ground, extends the stroke for hitting operation；By increasing the neonychium of an anticollision in clamping jaw front end, Anti-collision device plays buffer function when clamping jaw is impacted, and reduces the damage hit to clamping jaw threaded portion, drill chuck is avoided to lose Effect.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the enlarged diagram at positioning key；

Fig. 3 is the structural schematic diagram of drill body；

Fig. 4 is the structural schematic diagram of steel ball；

Fig. 5 is the structural schematic diagram of housing；

Fig. 6 is the structural schematic diagram of flat key；

Fig. 7 is the structural schematic diagram of clamping jaw；

Fig. 8 is the structural schematic diagram that clamping jaw is matched with neonychium.

Symbol description in figure:

1. drill body；2. clamping jaw；3. housing；4. screw；5. through-hole；6. groove；7. positioning key；8. outer circle；9. inclination angle；10. Circular hole；11. neonychium.

Specific embodiment

Specific embodiment of the present utility model is described in detail with reference to the accompanying drawings.

As shown in Figure 1, the utility model is equipped with drill body 1, clamping jaw 2, housing 3, screw 4, three clamping jaws 2 are respectively arranged at brill In three be uniformly distributed circumferentially inclined hole on body 1, screw 4 is set in the screw slot of drill body 1, and screw 4 and clamping jaw 2 use spiral shell Line connection, 3 inside of housing are fixedly connected with drill body 1, and housing 3 is fixedly connected with screw 4, and housing 3 drives screw 4 to rotate, drill body 1 There is threaded hole at rear portion, connect with electric drill host output shaft, and driving drill body 1 drives three clamping jaws 2 and folded when host output shaft rotates Tool rotates synchronously.

As shown in Figures 2 and 3,1 back end circumference of drill body is equipped with through-hole 5, positioning key 7 is equipped with inside through-hole 5, such as Fig. 4 institute Show, positioning key 7 is steel ball；As shown in figure 5,3 inner wall circumference of housing be equipped with groove 6 corresponding with positioning key 7,1 turn of drill body Positioning key 7 generates radial deflection in through-hole 5 when dynamic, is displaced to positioning key 7 in 3 inboard wall groove 6 of housing, and housing 3 is carried out axis To positioning, make housing 3 that axial dipole field can not occur, eliminates the security risk that the housing 3 occurred in use process falls off, hurts sb.'s feelings.

Preferably, as shown in fig. 6, positioning key 7 can also be flat key.

As shown in fig. 7,8 top of outer circle of 2 front end of clamping jaw is equipped with inclination angle 9, the angle between 2 axial direction of inclination angle 9 and clamping jaw is big Angle between 2 axial direction of outer circle 8 and clamping jaw, the setting at inclination angle 9 can effectively reduce 2 front end forced area of clamping jaw, make clamping jaw 2 Front end forced area is reduced, and when making impact with the ground, extends the stroke for hitting operation, to reduce shock to 2 threaded portion of clamping jaw The damage divided, avoids collet from failing.

As shown in figure 8,2 top of clamping jaw is equipped with circular hole 10, it is equipped with neonychium 11 at circular hole 10, neonychium 11 can be inserted into circular hole Cooperate in 10 with circular hole 10, neonychium 11 can be the soft material that rubber etc. is conducive to buffering, and neonychium 11 rises when clamping jaw 2 is impacted To buffer function, the damage hit to 2 threaded portion of clamping jaw is reduced；It is hitting at the ligament position that clamping jaw 2 clamps handle kind tool simultaneously It is not contacted directly when hitting with ground, avoids the destruction to 2 ligament position of clamping jaw, it is effective to maintain clamp precision.

Only as described above, only specific embodiment of the utility model, when the utility model cannot be limited with this The range of implementation, therefore the displacement of its equivalent assemblies, or according to equivalent changes and modifications made by the utility model patent protection scope, It should still belong to the scope that the utility model claims book is covered.

Claims (6)

1. a kind of drill chuck, is equipped with drill body, clamping jaw, housing, screw, three clamping jaws are respectively arranged on the drill body In three inclined holes being uniformly distributed circumferentially, the screw is used with the clamping jaw and is threadedly coupled, the housing and the screw It is fixedly connected, which is characterized in that the drill body back end circumference is equipped with through-hole, and positioning key is equipped with inside the through-hole, described outer It covers inner wall circumference and is equipped with groove corresponding with the positioning key, positioning key generation is radial inclined in through-hole when the drill body rotates It moves, is displaced to the positioning key in the outer casing inner wall groove, the housing is subjected to axially position.

2. drill chuck according to claim 1, it is characterised in that the positioning key is steel ball.

3. drill chuck according to claim 1, it is characterised in that the positioning key is flat key.

4. drill chuck according to any one of claim 1-3, it is characterised in that the outer domed end of the clamping jaw front end is set There is inclination angle, the angle between the inclination angle and the clamping jaw axial direction is greater than the angle between the outer circle and the clamping jaw axial direction.

5. drill chuck according to any one of claim 1-3, it is characterised in that the clamping jaw top is equipped with circular hole, described Neonychium is equipped at circular hole.

6. drill chuck according to claim 5, it is characterised in that the protection cushion material is rubber.