CN107322057B

CN107322057B - Hand-tightening drill chuck

Info

Publication number: CN107322057B
Application number: CN201710605087.9A
Authority: CN
Inventors: 周文华; 吴云贵; 卢启荣
Original assignee: Zhejiang Sanou Machinery Co Ltd
Current assignee: Zhejiang Sanou Machinery Co Ltd
Priority date: 2017-07-24
Filing date: 2017-07-24
Publication date: 2023-09-15
Anticipated expiration: 2037-07-24
Also published as: CN107322057A

Abstract

The invention provides a hand-tightening drill chuck, which comprises a drill body, a nut and clamping jaws; the hand drill chuck is characterized by further comprising first axial teeth or keys arranged on the nut or a ring piece fixedly connected with the nut, the hand drill chuck is further provided with a lifting piece which cannot rotate relative to the drill body but can lift axially, the lifting piece is provided with second axial teeth or keys, the hand drill chuck is provided with a lifting mechanism of the lifting piece, the second axial teeth or keys can be meshed with and separated from the first axial teeth or keys, and the hand drill chuck is provided with an operating component of the lifting mechanism. The invention can keep constant large clamping force, not only can resist instant impact torque, but also can prevent the nut from loosening and jamming, can be used conventionally, and can also meet the application of electric or pneumatic wrenches and screwdrivers.

Description

Hand-tightening drill chuck

Technical Field

The invention relates to a hand drill chuck which can be used as an electric tool or a pneumatic tool.

Background

In the prior art, a drill body, clamping jaws and nuts are arranged in a drill chuck, and the clamping jaws are driven to move forwards or backwards by rotating the nuts so as to clamp or loosen a drilling tool. In order to prevent the clamping jaw from loosening and clamping the tool, the drill chuck is usually solved by increasing the clamping force or adopting a self-locking structure. The self-locking structure is generally formed by matching a part with a spring piece and teeth on a drill body, and has the functional characteristic that the nut can not reversely rotate and only rotate more tightly when the drill chuck rotates to work. In some application occasions, for example, when a screwdriver or a spanner is clamped as an electric tool or a pneumatic tool, the instantaneous impact torque is needed to loosen a part, at this time, the possibility that a nut is loosened and a clamping jaw cannot clamp the tool still exists simply by improving the clamping force, and a self-locking structure is adopted.

Disclosure of Invention

The technical problem to be solved by the invention is to provide the hand-tightening drill chuck which can keep constant large clamping force, can not loosen and lock nuts during working, and can meet the application of electric or pneumatic wrenches and screwdrivers. For this purpose, the invention adopts the following technical scheme:

a hand-tightened drill chuck comprises a drill body, a nut and clamping jaws; the hand drill chuck is characterized by further comprising first axial teeth or keys arranged on the nut or a ring piece fixedly connected with the nut, the hand drill chuck is further provided with a lifting piece which cannot rotate relative to the drill body but can lift axially, the lifting piece is provided with second axial teeth or keys, the hand drill chuck is provided with a lifting mechanism of the lifting piece, the second axial teeth or keys can be meshed with and separated from the first axial teeth or keys, and the hand drill chuck is provided with an operating component of the lifting mechanism.

On the basis of adopting the technical scheme, the invention can also adopt the following further technical schemes or use the further technical schemes in combination:

the lifting piece is an annular piece, is arranged in front of the nut and is sleeved outside the drill body.

An outer sleeve is arranged in front of the nut and serves as the operating component.

The lifting mechanism comprises a spring and a control ring piece, the lifting piece is provided with a concave boss, the concave boss and the control ring piece form cam mechanism control fit, and the lifting piece is driven to axially advance and retreat through the cam mechanism control fit and the spring.

The rotatable outer sleeve is arranged in front of the nut and is connected with the control ring part as the operation part.

The spring is positioned in front of the concave boss, and the control ring is positioned behind the concave boss.

The front part of the drill body is connected with a clamping ring, the front part of the spring is abutted against a gasket limited by the clamping ring, the hand-tight drill chuck is provided with a rotatable outer sleeve which is used as the operation part, and the outer sleeve is connected with a control ring piece; the clamping ring, the spring, the gasket and the lifting piece are all surrounded by the jacket

The nut is externally connected with a nut sleeve, and the first axial teeth are arranged on the nut or the nut sleeve.

The hand drill chuck is provided with a rotating sleeve for operating the nut at the rear of the outer sleeve, and the rotating sleeve is connected with the nut or connected with a nut sleeve outside the nut.

The control ring piece is a rotatable ring piece, and the drill chuck is provided with a limiting structure for the rotation angle range of the control ring piece.

By adopting the technical scheme of the invention, constant large clamping force can be kept, the instant impact torque can be resisted, the nut cannot be loosened, the nut can not be blocked, the conventional use can be realized, and the application of electric or pneumatic spanners and screwdrivers can be satisfied.

Drawings

Fig. 1 is a cross-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 the drill body in the embodiment shown in fig. 1.

Fig. 4 is a top view of the drill body of the embodiment of fig. 1.

Fig. 5 is a front view of the lifter in the embodiment shown in fig. 1.

Fig. 6 is a schematic perspective view of the lifter in the embodiment shown in fig. 1.

Fig. 7 is a bottom view of the lifter in the embodiment of fig. 1.

Fig. 8 is a schematic perspective view of the control ring in the embodiment shown in fig. 1.

Fig. 9 is a front view of the control collar in the embodiment of fig. 1.

Fig. 10 is a schematic view of the cooperation of the control ring and the lifting member, showing the cooperation state of the lifting member in the low position.

FIG. 11 is a schematic view of the engagement of the control ring member and the lifting member, showing the engagement of the lifting member in the raised position.

Fig. 12 is an exploded view of embodiment 2 of the present invention.

Detailed Description

Reference is made to the accompanying drawings. The invention provides a hand drill chuck, which comprises a drill body 1, a nut 40, a clamping jaw 5 and first axial teeth 41 arranged on a ring piece 4 fixedly connected with the nut 40, wherein the ring piece 4 is preferably a nut sleeve, the hand drill chuck is also provided with a lifting piece 2 which cannot rotate relative to the drill body 1 but can axially lift, the lifting piece 2 is provided with second axial teeth 23, the hand drill chuck is provided with a lifting mechanism of the lifting piece 2, the second axial teeth 23 can be meshed with and separated from the first axial teeth 41, and the hand drill chuck is provided with an operating component of the lifting mechanism. The axial teeth 41, 23 may also be replaced by keys, or other catch slots.

The lifting member is arranged in front of the nut 40, the lifting member 2 is preferably an annular member, the lifting member 2 is sleeved outside the drill body 1, and the lifting member 2 is prevented from rotating by the engagement of the plane 22 on the inner side thereof with the plane 11 of the drill body 1.

The hand drill chuck is provided with the outer sleeve 7 in front of the nut 40 as the operating member, which is more ergonomic and more convenient to operate.

The lifting mechanism comprises a spring 8 and a control ring piece 3, the lifting piece 2 is provided with a concave-convex table 20 and an installation column body part 21, the concave-convex table 20 and the control ring piece 3 form cam mechanism control fit, and the lifting piece 2 is driven to move forwards and backwards along the axial direction through the cam mechanism control fit and the spring 8. The cam mechanism comprises a portion 24 at the lower end face of the boss 20 and a portion 33 at the control ring 3.

The second axial teeth 23 may be a ring gear member which is first fitted into the mounting cylinder 21 of the lifting member 2 and then attached to the end of the mounting cylinder 21.

The control ring 3 itself may also be used as the operating member, preferably the control ring 3 is a rotatable ring, the outer sleeve 7 is connected to the control ring 3, and the control ring 3 is operated by the outer sleeve 7. The hand drill chuck is provided with a limiting structure for controlling the rotation angle range of the ring piece 3. The limit structure may be located between the control collar 3 and the drill body 1 or between a part which is not rotatable relative to the drill body 1, in this embodiment it consists of a groove 34 provided on the control collar 3 and a key 25 on the lifting member 2.

The spring 8 is positioned in front of the concave-convex stage 20, and the control ring 3 is positioned behind the concave-convex stage 20.

The front part of the drill body 1 is connected with a clamping ring 10, the front part of the spring 8 is abutted against a gasket 9 limited by the clamping ring 10, and the clamping ring 10, the spring 8, the gasket 9 and the lifting piece 2 can be surrounded by the outer sleeve, so that good appearance and protection are provided.

The hand drill chuck is provided with a rotating sleeve 6 for operating the nut at the rear of the outer sleeve, and the rotating sleeve 6 is connected with a nut 40 or connected with a nut sleeve 4 outside the nut.

Referring to fig. 12, the first axial teeth 41 may also be provided on the nut 40.

Fig. 10 shows that under the pushing action of the spring and the control of the cam mechanism, the lifting member 2 is lowered to the lowered position, the first axial teeth 41 and the second axial teeth 23 are engaged, the process can be performed after the clamping jaws of the drill chuck clamp the tool (such as a screwdriver, a wrench), and after the first axial teeth 41 and the second axial teeth 23 are engaged, the clamping force of the clamping jaws is not changed any more, so that the clamping force can be kept very high, and the phenomenon that the clamping is tighter in the self-locking structure, so that the loosening phenomenon cannot occur can not occur. After the end of the operation, the outer sleeve 7 is operated to rotate the control ring 3 in the opposite direction, the lifting member 2 is lifted by the driving of the cam mechanism, the spring 8 is compressed, the first axial teeth 41 and the second axial teeth 23 are disengaged (see fig. 11), and at this time, the rotating sleeve is operated again to rotate the nut in the opposite direction, and the tool is released. Thus being perfectly applicable to electric or pneumatic wrenches and screwdrivers.

The control of the engagement of the first axial teeth 41 and the second axial teeth 23 by the cam mechanism is not automated and does not interfere with the forward and reverse rotation of the nut itself until the cam mechanism is not operated. In this way, the user can provide the user with a different option without having to operate the cam mechanism to engage the first axial teeth 41 with the second axial teeth 23 after the jaw grips the tool in a normal application, without changing the operation of the normal application.

The above embodiments are merely examples of the present invention, but the present invention is not limited thereto, and any changes or modifications made by those skilled in the art are included in the scope of the present invention.

Claims

1. A hand-tightened drill chuck comprises a drill body, a nut and clamping jaws; the hand drill chuck is characterized by further comprising first axial teeth or keys arranged on the nut or a ring piece fixedly connected with the nut, the hand drill chuck is further provided with a lifting piece which cannot rotate relative to the drill body but can lift axially, the lifting piece is provided with second axial teeth or keys, the hand drill chuck is provided with a lifting mechanism of the lifting piece, the second axial teeth or keys can be meshed with and separated from the first axial teeth or keys, and the hand drill chuck is provided with an operating component of the lifting mechanism.

2. The hand drill chuck according to claim 1, wherein the lifting member is a ring member disposed in front of the nut and is sleeved outside the drill body.

3. A hand drill chuck according to claim 2, characterized in that it is provided with a jacket in front of the nut as said operating member.

4. A hand drill chuck according to claim 2, wherein the lifting mechanism comprises a spring and a control collar member, the lifting member being provided with a female boss, the female boss and the control collar member forming a cam mechanism control engagement and driving the lifting member to advance and retract axially by the cam mechanism control engagement and the spring.

5. A hand drill chuck according to claim 4, characterized in that it is provided with a rotatable sleeve in front of the nut, said sleeve being connected to the control ring member as said operating member.

6. The hand drill chuck according to claim 4, wherein the spring is located forward of the boss and the control collar is located rearward of the boss.

7. A hand drill chuck according to claim 6, characterized in that the front part of the drill body is connected with a collar, the front part of the spring rests against a washer limited by the collar, the hand drill chuck is provided with a rotatable outer sleeve as the operating member, the outer sleeve being connected with a control collar member; the collar, spring, washer, lifter are all surrounded by the outer sleeve.

8. A hand drill chuck according to claim 1 wherein a nut sleeve is externally connected to the nut, the first axial teeth being provided on the nut or nut sleeve.

9. A hand drill chuck according to claim 7, characterized in that the hand drill chuck is provided with a swivel housing for operating the nut behind the outer sleeve, the swivel housing being connected to the nut or to a nut housing outside the nut.

10. A hand drill chuck according to claim 4 wherein the control collar member is a rotatable collar member, the drill chuck being provided with a limit structure for the range of angles of rotation of the control collar member.