CN204800541U

CN204800541U - Screw chuck

Info

Publication number: CN204800541U
Application number: CN201520265500.8U
Authority: CN
Inventors: 张波; 赵江东; 张德根
Original assignee: West Anhui University
Current assignee: West Anhui University
Priority date: 2015-04-28
Filing date: 2015-04-28
Publication date: 2015-11-25
Anticipated expiration: 2025-04-28

Abstract

The utility model discloses a screw chuck, including check nut, spring, inner skleeve and pullover, an inner skleeve tip is equipped with the inner skleeve external screw thread, and it is protruding that the other end is equipped with the inner skleeve edge, check nut is equipped with the check nut internal thread, it is pullover including establishing at the inside three elasticity grapple of the pullover internal contraction section of one end, the other end and establishing the pullover shell fragment on pullover outer wall, the spring housing is on the inner skleeve, the inner skleeve external screw thread of inner skleeve closes with the interior thread to match of check nut's check nut, the telescopic other end including the pullover pullover internal contraction section cover. The utility model discloses when twisting the screw with the screwdriver, can prevent the screw landing, compare with the tradition, need not with the hand screw of living, the convenient to use flexibility, that can effectively fall avoids the screw landing, and simultaneously, screw chuck, screwdriver and screw three are separable, easy operation, convenient to use.

Description

Screw chuck

Technical field

The utility model relates to the attaching parts of a kind of screwdriver and screw, specifically a kind of screw chuck.

Background technology

Often can run in daily life and tighten up a screw nail with screwdriver, usually tightening up a screw in nail process with screwdriver, when screw also fails to enter in mounting object, screw is easy to landing.In order to solve such problem, a lot of driver bit all has magnetic, but great effect of still cannot get up in the process used.

Application publication number CN104416515A discloses a kind of simple to operate, not easily drop the screwdriver of screw in installation process, comprise handle and the screwdriver body of rod, handle and the screwdriver body of rod are fixedly linked, cutter head is set to away from one end of handle at the screwdriver body of rod, cutter head is set with metal cylinder, is provided with the spring be fixedly linked with the screwdriver body of rod at the tail end of metal cylinder, be provided with the inner chamber coordinated with cap nut cylindrical in the inside of metal cylinder.Spring is utilized metal cylinder and the screwdriver body of rod to be fixedly linked, again by the inner inner chamber coordinated with cap nut cylindrical of metal cylinder, make people fetch and deliver in process at handling screw, the effect of gripping can be played screw, can effectively prevent screw from falling fetching and delivering the accident in process.

In addition, Authorization Notice No. CN202572255U disclose a kind of prevent screw from coming off screwdriver and Authorization Notice No. CN201012484Y disclose a kind of screw clamp, all on driver bit, be provided with clamping device, screw can be played and fetching and delivering falling in process.

But technique scheme all uses metal cylinder and the screwdriver body of rod to be fixedly linked, and both can not separate use separately, make screwdriver function single, have certain weak point.

Utility model content

In order to solve the problems referred to above that prior art exists, the utility model provides a kind of installing in the process of screw with screwdriver, effectively can avoid the screw chuck of screw landing.First screw chuck is fixed in the position that driver bit is suitable, then screw is stuck in screw chuck pullover in.

The purpose of this utility model can be achieved through the following technical solutions:

Screw chuck, comprise lock nut, spring, inner sleeve and pullover, described inner sleeve one end is provided with inner sleeve external screw thread, and the other end is provided with inner sleeve edge projection; Described lock nut is provided with lock nut internal thread; Describedly pulloverly comprise the pullover interior contraction section being located at its one end and the some pullover shell fragment be located on pullover outer wall, some described pullover shell fragment lower inside are equipped with elasticity grapple; Described spring housing is on inner sleeve; The inner sleeve external screw thread of described inner sleeve matches with the lock nut internal thread of lock nut; Described pullover pullover interior contraction section is enclosed within the other end of inner sleeve.

The inner sleeve external screw thread of described inner sleeve is counterclockwise tapered thread, and tapered thread radial direction all has some stria mouths.

Described stria mouth is provided with three.

Described spring is around to for counterclockwise.

Described lock nut has nut top and nut bottom, and nut upper diameter is greater than nut lower diameter, and inner sleeve inserts through nut bottom, and nut top loop side surface has non slip surface.

Described pullover shell fragment is provided with three, and the pullover shell fragment lower inside described in three is equipped with elasticity grapple.

The beneficial effects of the utility model: it is be enclosed within outside inner sleeve that the utility model utilizes pullover, then by spring housing on inner sleeve, fix with lock nut again, by tightening lock nut, screw chuck is fixed on screwdriver, pullover for blocking screw, make it not easily from screwdriver landing, when twisting screw with screwdriver, screw landing can be prevented, compared with tradition, without the need to hand steered live screw, easy to use and flexible, that can effectively fall avoids screw landing, simultaneously, screw chuck, screwdriver and screw three separable, simple to operate, easy to use.

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

Fig. 1 is the structural representation that the utility model screw chuck coordinates;

Fig. 2 is the structural representation of the utility model lock nut;

Fig. 3 is the structural representation of the utility model spring

Fig. 4 is the structural representation of the utility model inner sleeve;

Fig. 5 is the pullover front elevational schematic of the utility model;

Fig. 6 is the pullover longitudinal cross-sectional schematic of the utility model;

Fig. 7 is the pullover horizontal cross-sectional schematic of the utility model;

Cooperation schematic diagram when Fig. 8 is the utility model use.

In figure: 1, screwdriver; 2, screw chuck; 3, screw; 21, lock nut; 22, spring; 23, inner sleeve; 24, pullover; 211, lock nut internal thread; 212, non slip surface; 231, inner sleeve external screw thread; 232, stria mouth; 233, inner sleeve edge projection; 241, pullover interior contraction section; 242, pullover outer wall; 243, pullover shell fragment, 244, elasticity grapple.

Detailed description of the invention

As illustrated in figures 1 and 8, the screw chuck 2 that the utility model provides is as the attaching parts of screwdriver 1 with screw 3, comprise lock nut 21, spring 22, inner sleeve 23 and pullover 24, inner sleeve 23 1 end is inner sleeve external screw thread 231, and as shown in Figure 4, inner sleeve external screw thread 231 is counterclockwise tapered thread, tapered thread radial equipartition has three stria mouths 232, be not limited to three, three is best setting, and inner sleeve 23 other end is provided with inner sleeve edge projection 233.Lock nut 21 has lock nut internal thread 211, and lock nut 21 also has nut top and nut bottom, and nut upper diameter is greater than nut lower diameter, and as Fig. 2, nut top loop side surface has non slip surface 212.As shown in Fig. 5, Fig. 6 and Fig. 7, pullover 24 comprise the pullover interior contraction section 24 being located at its one end and the some pullover shell fragment 243 be located on pullover outer wall 241, some pullover shell fragment 243 lower inside are equipped with elasticity grapple 244, pullover shell fragment 243 is provided with three, pullover shell fragment 243 lower inside described in three is equipped with elasticity grapple 244, and arc can be arranged in elasticity grapple 244 top.Spring 22 is enclosed within inner sleeve 23, and as Fig. 3, spring 22, around to for counterclockwise, is not limited to counterclockwise, and be best setting counterclockwise, spring 22 is between pullover 24 and lock nut 21.

Inner sleeve 23 inserts through nut bottom, and the inner sleeve external screw thread 231 of inner sleeve 23 matches with the lock nut internal thread 211 of lock nut 21, and the pullover interior contraction section 241 of pullover 24 is enclosed within the other end of inner sleeve 23.

Working method: pullover 24 is be enclosed within outside inner sleeve 23, then spring 22 is enclosed within inner sleeve 23, fix with lock nut 21 again, the degree that lock nut 21 is tightened can control inner sleeve 23 internal diameter, during use, inner sleeve 23 is enclosed within screwdriver 1, is fixed on screwdriver 1 by screw chuck 2 by tightening lock nut 21.Pullover 24 for blocking screw 1, makes it not easily from screwdriver 1 landing.

Adopting screw chuck of the present utility model, when twisting screw with screwdriver, screw landing can be prevented, compared with tradition, without the need to hand steered live screw, easy to use and flexible.Meanwhile, screw chuck and screwdriver are after completing your work, separable, simple to operate, easy to use.

Above content is only to the utility model structure example and explanation; affiliated those skilled in the art make various amendment to described specific embodiment or supplement or adopt similar mode to substitute; only otherwise depart from the structure of utility model or surmount this scope as defined in the claims, protection domain of the present utility model all should be belonged to.

Claims

1. screw chuck, comprise lock nut (21), spring (22), inner sleeve (23) and pullover (24), it is characterized in that, described inner sleeve (23) end is provided with inner sleeve external screw thread (231), and the other end is provided with inner sleeve edge projection (233); Described lock nut (21) is provided with lock nut internal thread (211); Described pullover (24) comprise the pullover interior contraction section (241) being located at its one end and the some pullover shell fragment (243) be located on pullover outer wall (241), and some described pullover shell fragment (243) lower inside are equipped with elasticity grapple (244); Described spring (22) is enclosed within inner sleeve (23); The inner sleeve external screw thread (231) of described inner sleeve (23) matches with the lock nut internal thread (211) of lock nut (21); The pullover interior contraction section (242) of described pullover (24) is enclosed within the other end of inner sleeve (23).

2. screw chuck according to claim 1, is characterized in that, the inner sleeve external screw thread (231) of described inner sleeve (23) is counterclockwise tapered thread, and tapered thread radial direction all has some stria mouths (232).

3. screw chuck according to claim 2, is characterized in that, described stria mouth (232) is provided with three.

4. screw chuck according to claim 1, is characterized in that, described spring (22) is around to for counterclockwise.

5. screw chuck according to claim 1, it is characterized in that, described lock nut (21) has nut top and nut bottom, nut upper diameter is greater than nut lower diameter, inner sleeve (23) inserts through nut bottom, and nut top loop side surface has non slip surface (212).

6. screw chuck according to claim 1, is characterized in that, described pullover shell fragment (243) is provided with three, and pullover shell fragment (243) lower inside described in three is equipped with elasticity grapple (244).