阅读说明：本技术 一种钻夹头 (Drill chuck ) 是由 李香玉 于 2018-09-12 设计创作，主要内容包括：本发明提供了一种钻夹头,它在螺母后方的一圈钢珠的和旋转套之间设置可向外扩张变形和向内回收的圈体,所述圈体具有被钢珠推抵的部位以及在所述圈体向外扩张变形后和旋转套或和与旋转套固定连接的部件配合的外侧部位,所述外侧部位和旋转套或和与旋转套固定连接的部件之间具有间隙且所述间隙处在所述圈体的变形范围内,所述螺母和所述支撑结构之间形成依靠钻夹头工作时产生的后推力的钢珠推挤结构,使得所述钢珠能向外推挤所述圈体向外扩张变形。本发明结构简单,能够在钻夹头的原有结构基础上,对旋转套起到抵抗惯性防松作用,使得钻夹头在钻孔工作中能保持原有工作状态。(The invention provides a drill chuck, which is characterized in that a ring body capable of expanding outwards and being recovered inwards is arranged between a ring of steel balls at the rear part of a nut and a rotating sleeve, the ring body is provided with a part pushed by the steel balls and an outer side part matched with the rotating sleeve or a part fixedly connected with the rotating sleeve after the ring body expands outwards and deforms, a gap is formed between the outer side part and the rotating sleeve or the part fixedly connected with the rotating sleeve and is positioned in the deformation range of the ring body, and a steel ball pushing structure depending on the back thrust generated when the drill chuck works is formed between the nut and a supporting structure, so that the steel balls can push the ring body outwards to expand and deform. The invention has simple structure, and can resist inertia and prevent looseness on the rotating sleeve on the basis of the original structure of the drill chuck, so that the drill chuck can keep the original working state in the drilling work.)

1. A drill chuck comprises a rotary sleeve, a drill body, a nut and a clamping jaw, wherein the nut is in threaded connection with the clamping jaw, the rotary sleeve is directly connected with the nut or connected with the nut through a connecting structure, the drill body is provided with an inclined clamping jaw hole for the clamping jaw to slide back and forth along the clamping jaw hole, a circle of steel balls are arranged around the drill body behind the nut, and a supporting structure is arranged behind the circle of steel balls; the drill chuck is characterized in that a ring body which can be expanded and deformed outwards and recycled inwards is arranged between the ring of steel balls and the rotating sleeve, the ring body is provided with a part pushed by the steel balls and an outer side part matched with the rotating sleeve or a part fixedly connected with the rotating sleeve after the ring body is expanded and deformed outwards, a gap is formed between the outer side part and the rotating sleeve or the part fixedly connected with the rotating sleeve when the drill chuck does not work, the gap is positioned in the deformation range of the ring body, and a steel ball pushing structure depending on the back thrust generated when the drill chuck works is formed between the nut and the supporting structure, so that the steel balls can push the ring body outwards and expand and deform.

2. A drill chuck according to claim 1, wherein said urging means comprises a forwardly outwardly inclined ramp provided on the rear end surface of the nut or/and a rearwardly outwardly inclined ramp of said support structure.

3. The drill chuck as claimed in claim 1, wherein the support structure includes a spacer disposed behind the steel balls and a step in the middle of the drill body.

4. The drill chuck according to claim 1, wherein said collar body has a selected range including a retaining ring disposed about said ring of balls.

5. A drill chuck according to claim 1, wherein said ring of steel balls is captured in a collar, the selective extent of said collar including the portion of said collar outside the side of the steel balls facing the rotatable sleeve.

6. The drill chuck according to claim 1, wherein said steel balls are wrapped with grease for bearings.

7. The drill chuck as claimed in claim 1, wherein said ring body is a plastic ring body or a thin steel or iron ring body.

8. A drill chuck according to claim 1, wherein said collar is disposed between the rear end face of the nut and said support structure.

9. The drill chuck according to claim 1, wherein said outer portion has a range of surface selections including smooth surfaces and rough surfaces.

Technical Field

The invention relates to a drill chuck, in particular to a hand-fastening drill chuck.

Background

The drill chuck is internally provided with a drill body, a clamping jaw and a nut, the nut is in threaded connection with the clamping jaw, a rotating sleeve is arranged in the hand-tightened drill chuck, the rotating sleeve is directly connected with the nut or is connected with the nut through a connecting structure, and the rotating sleeve is operated by hand to rotate the nut so as to drive the clamping jaw to move forwards or backwards to enable the clamping jaw to clamp or loosen the drill bit. In practical use, when the drill bit is clamped for drilling, once inertial motion occurs, the rotating sleeve may loosen due to inertia and the like, so that the drill bit may loosen or the locking state of the drill chuck may fail.

Disclosure of Invention

The invention aims to solve the technical problem of providing a drill chuck which can resist inertia and prevent looseness of a rotating sleeve in work. Therefore, the invention adopts the following technical scheme:

a drill chuck comprises a rotary sleeve, a drill body, a nut and a clamping jaw, wherein the nut is in threaded connection with the clamping jaw, the rotary sleeve is directly connected with the nut or connected with the nut through a connecting structure, the drill body is provided with an inclined clamping jaw hole for the clamping jaw to slide back and forth along the clamping jaw hole, a circle of steel balls are arranged around the drill body behind the nut, and a supporting structure is arranged behind the circle of steel balls; the drill chuck is characterized in that a ring body which can be expanded and deformed outwards and recycled inwards is arranged between the ring of steel balls and the rotating sleeve, the ring body is provided with a part pushed by the steel balls and an outer side part matched with the rotating sleeve or a part fixedly connected with the rotating sleeve after the ring body is expanded and deformed outwards, a gap is formed between the outer side part and the rotating sleeve or the part fixedly connected with the rotating sleeve when the drill chuck does not work, the gap is positioned in the deformation range of the ring body, and a steel ball pushing structure depending on the back thrust generated when the drill chuck works is formed between the nut and the supporting structure, so that the steel balls can push the ring body outwards and expand and deform.

Further, the pushing structure comprises a forward and outward inclined plane arranged on the rear end face of the nut or/and a backward and outward inclined plane of the supporting structure.

Furthermore, the selection range of the support structure comprises a gasket arranged behind the steel ball and a step in the middle of the drill body.

Further, the selection range of the ring body comprises a limiting ring on the periphery of the ring of steel balls.

Further, the ring of steel balls is clamped in the ring frame, and the selection range of the ring body comprises the part of the ring frame, which is positioned outside the side, facing the rotating sleeve, of the steel balls.

Further, the steel balls wrap grease for the bearing.

Further, the ring body is a plastic ring body or a thin steel ring body or an iron ring body.

Further, the ring body is between the rear end face of the nut and the support structure.

Further, the selection range of the outer part comprises a surface and teeth, the selection range of the surface comprises a smooth surface and a rough surface, and the rough surface can be a surface with regular grains or irregular grains, a rough surface and the like.

By adopting the technical scheme of the invention, the rotary sleeve anti-inertia anti-loosening drill chuck is simple in structure, and can play a role in resisting inertia anti-loosening on the basis of the original structure of the drill chuck, so that the drill chuck can keep the original working state in the drilling work.

Drawings

Fig. 1 is a sectional view of embodiment 1 of the present invention.

Fig. 2 is an exploded view of example 1 of the present invention.

Fig. 3 is a schematic view of a nut in embodiment 1 of the present invention.

Fig. 4 is a schematic view of a steel ball and ring frame assembly in embodiment 1 of the present invention.

Fig. 5 is a sectional view of embodiment 2 of the present invention.

Fig. 6 is a schematic view of a gasket in embodiment 2 of the present invention.

Fig. 7 is a sectional view of embodiment 3 of the present invention.

FIG. 8 is a schematic view of a drill body according to example 3 of the present invention.

Fig. 9 is a sectional view of embodiment 4 of the present invention.

Fig. 10 is an exploded view of example 4 of the present invention.

Fig. 11 is a sectional view of embodiment 5 of the present invention.

Fig. 12 is a sectional view of example 6 of the present invention.

FIG. 13 is a schematic view of a drill body according to example 6 of the present invention.

Detailed Description