CN216343278U

CN216343278U - Combined screw with locking function

Info

Publication number: CN216343278U
Application number: CN202122791855.9U
Authority: CN
Inventors: 谢家成
Original assignee: Nanjing Fobel Hardware Products Co ltd
Current assignee: Nanjing Fobel Hardware Products Co ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-04-19
Anticipated expiration: 2031-11-15

Abstract

The utility model discloses a combined screw with a locking function, which belongs to the technical field of combined screws and comprises a screw body and a nut; the screw body consists of a front threaded section, a middle polished rod section, a rear threaded section and a nail head, wherein a spring groove is formed in the end face of the front threaded section, a spring is arranged in the spring groove, a guide pillar is arranged in the spring, and a contact protrusion A is arranged at the front end of the guide pillar; the end face of the rear side of the nut is provided with a threaded hole, the front end of the threaded hole is provided with a locking cavity, the inner wall of the locking cavity is provided with a contact bulge B, and the end face of the front side of the nut is of a sealing structure. According to the utility model, the structure of the existing screw is improved, so that a section of the preposed thread section is arranged at the front end of the screw body, after the preposed thread section is in threaded connection with the threaded hole on the nut, the preposed thread section enters the locking cavity matched with the length of the preposed thread section and is just separated from the threaded hole in continuous screwing, the nut is not in threaded butt joint under torsion, and the problem of thread damage caused by continuous stress of the traditional nut is avoided.

Description

Combined screw with locking function

Technical Field

The utility model relates to the technical field of combined screws, in particular to a combined screw with a locking function.

Background

The existing combined screw is manually judged whether to be screwed down in the assembling process, so that the assembling is over-tight possibly, and further thread damage is caused. In view of this, we propose a combination screw with locking function.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

The present invention is directed to a combination screw with a locking function to solve the above problems in the prior art.

2. Technical scheme

A combined screw with a locking function comprises a screw body and a nut in threaded fit with the screw body;

the screw body consists of a front threaded section, a middle polished rod section, a rear threaded section and a nail head, the front threaded section, the middle polished rod section, the rear threaded section and the nail head are sequentially connected, a spring groove is formed in the end face of the front threaded section, a spring is arranged in the spring groove, a guide pillar fixedly connected with the spring groove is coaxially arranged in the spring, and a contact protrusion A is arranged at the front end of the guide pillar;

the nut is characterized in that a threaded hole is formed in the end face of the rear side of the nut, a locking cavity is formed in the front end of the threaded hole, a contact protrusion B is arranged on the inner wall of the locking cavity, and the end face of the front side of the nut is of a sealing structure.

Preferably, the number of the thread turns of the front thread section and the thread hole is 2, and the front thread section is in thread fit with the thread hole.

Preferably, the length of the leading thread segment is adapted to the length of the locking cavity.

Preferably, the front end of the spring is contacted with the inner wall of the locking cavity, and the rear end of the spring is contacted with the inner wall of the spring groove.

Preferably, the position of the contact protrusion a is aligned with the front end of the leading thread segment, and the rotational surface area of the contact protrusion a overlaps with the position of the contact protrusion B.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages that:

1. according to the utility model, the structure of the existing screw is improved, so that a section of the preposed thread section is arranged at the front end of the screw body, after the preposed thread section is in threaded connection with the threaded hole on the nut, the preposed thread section enters the locking cavity matched with the length of the preposed thread section and is just separated from the threaded hole in continuous screwing, the nut is not in threaded butt joint under torsion, and the problem of thread damage caused by continuous stress of the traditional nut is avoided.

2. The utility model also provides a contact bulge B in the locking cavity, so that when the preposed thread section of the screw body enters the locking cavity, the contact bulge B on the end surface of the preposed thread section is in contact extrusion with the contact bulge B, and then the sound is generated to remind an operator of the in-place threaded connection without continuously applying force.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the overall structure of the present invention;

FIG. 3 is a schematic cross-sectional view of the overall structure of the present invention after installation;

FIG. 4 is a front side view of the screw body according to the present invention;

FIG. 5 is a schematic view of a quarter of the connection structure of the nut and the screw body according to the present invention;

the reference numbers in the figures illustrate: 1. a screw body; 2. a nut; 3. a leading thread segment; 4. a middle polished rod section; 5. a rear thread section; 6. a nail head; 7. a threaded hole; 8. a locking cavity; 9. a contact projection B; 10. a spring slot; 11. a spring; 12. a guide post; 13. contacting the protrusion a.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-5, the present invention provides a technical solution:

a combined screw with a locking function comprises a screw body 1 and a nut 2 in threaded fit with the screw body 1;

the screw body 1 consists of a front threaded section 3, a middle polished rod section 4, a rear threaded section 5 and a nail head 6, the front threaded section 3, the middle polished rod section 4, the rear threaded section 5 and the nail head 6 are sequentially connected, a spring groove 10 is formed in the end face of the front threaded section 3, a spring 11 is arranged in the spring groove 10, a guide pillar 12 fixedly connected with the spring groove 10 is coaxially arranged in the spring 11, and a contact protrusion A13 is arranged at the front end of the guide pillar 12;

the rear end face of the nut 2 is provided with a threaded hole 7, the front end of the threaded hole 7 is provided with a locking cavity 8, the inner wall of the locking cavity 8 is provided with a contact bulge B9, and the front end face of the nut 2 is of a sealing structure.

According to the utility model, the structure of the existing screw is improved, so that a section of the preposed thread section 3 is arranged at the front end of the screw body 1, after the preposed thread section 3 is in threaded connection with the threaded hole 7 on the nut 2, the preposed thread section 3 enters the locking cavity 8 matched with the length of the preposed thread section and is just separated from the threaded hole 7 in continuous screwing, the nut 2 is not in threaded butt joint under torsion, and the problem of thread damage caused by continuous stress of the traditional nut 2 is avoided. In the utility model, the locking cavity 8 is also provided with a contact bulge B9, so that when the front threaded section 3 of the screw body 1 enters the locking cavity 8, the contact bulge B9 on the end surface of the front threaded section 3 is in contact extrusion with the contact bulge B9, and then the sound is emitted to remind an operator that the threaded connection is in place without continuously applying force.

Specifically, the number of thread turns of the front threaded section 3 and the threaded hole 7 is 2, and the front threaded section 3 is in threaded fit with the threaded hole 7. The number of the thread turns of the front thread section 3 is small, the width and the manufacturing cost of the nut 2 are reduced, and the appearance is improved.

Further, the length of the front thread section 3 is matched with the length of the locking cavity 8. Just enter locking chamber 8 completely after leading screw thread section 3 deviates from in the screw hole 7, reduce the connecting gap between nut 2 and the screw.

Still further, the front end of the spring 11 is contacted with the inner wall of the locking cavity 8, and the rear end of the spring 11 is contacted with the inner wall of the spring groove 10. By arranging the spring 11 between the nut 2 and the screw, the front threaded section 3 can smoothly enter the threaded hole 7 when the nut 2 and the screw are withdrawn.

It is noted that the position of the contact projection a13 is aligned with the front end of the lead screw thread section 3, and the rotational surface area of the contact projection a13 overlaps with the position of the contact projection B9. The contact bulge A13 and the contact bulge B9 are designed to be overlapped and extruded, so that when the two structures are contacted, a sound can be generated, the front threaded section 3 completely enters the locking cavity 8, and the torsion does not need to be applied continuously.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A combined screw with a locking function comprises a screw body (1) and a nut (2) in threaded fit with the screw body (1); the method is characterized in that:

the screw body (1) consists of a front threaded section (3), a middle polished rod section (4), a rear threaded section (5) and a nail head (6), the front threaded section (3), the middle polished rod section (4), the rear threaded section (5) and the nail head (6) are sequentially connected, a spring groove (10) is formed in the end face of the front threaded section (3), a spring (11) is arranged in the spring groove (10), a guide pillar (12) fixedly connected with the spring groove (10) is coaxially arranged in the spring (11), and a contact protrusion A (13) is arranged at the front end of the guide pillar (12);

the nut (2) rear end face seted up screw hole (7), screw hole (7) front end seted up locking chamber (8), locking chamber (8) inner wall is equipped with contact protrusion B (9), nut (2) front end face is seal structure.

2. A combination screw with locking function according to claim 1, characterized in that: the number of turns of the thread of the front threaded section (3) and the number of turns of the thread of the threaded hole (7) are 2, and the front threaded section (3) is in threaded fit with the threaded hole (7).

3. A combination screw with locking function according to claim 1, characterized in that: the length of the front threaded section (3) is matched with that of the locking cavity (8).

4. A combination screw with locking function according to claim 1, characterized in that: the front end of the spring (11) is in contact with the inner wall of the locking cavity (8), and the rear end of the spring (11) is in contact with the inner wall of the spring groove (10).

5. A combination screw with locking function according to claim 1, characterized in that: the position of the contact protrusion A (13) is aligned with the front end of the front threaded section (3), and the rotating surface area of the contact protrusion A (13) is overlapped with the position of the contact protrusion B (9).