CN220556015U - Self-locking fastening screw - Google Patents

Abstract

The utility model discloses a self-locking type fastening screw, which comprises a screw head main body and a screw body constructed at the center of the bottom end of the screw head main body, wherein a groove is formed in the center of the top end of the screw head main body, a cavity is formed in the screw body, fastening bolts extending into the cavity are movably arranged in the groove, rectangular grooves are formed in the bottom ends of two sides of the outer edge surface of the screw body, a pushing block is movably arranged in the rectangular grooves, a recess is centrally constructed on the inner side of the pushing block, convex rings which are simultaneously abutted against the two recesses are fixedly arranged at the bottom end of the outer edge surface of the fastening bolt, two guide grooves are symmetrically formed in two sides of the rectangular grooves, the two guide grooves are communicated with the cavity, and two guide keys are symmetrically constructed on two sides of the pushing block towards one end of the fastening bolt. The self-locking fastening screw rod has the functions of expansion and self locking, can improve the stability of connection with a screw hole, greatly improves the fastening effect when locking the screw hole, and has strong practicability.

Description

Self-locking fastening screw

Technical Field

The utility model belongs to the technical field of fasteners, and particularly relates to a self-locking fastening screw.

Background

The screw rod is a cylindrical threaded fastener matched with a nut, and the fastener consists of a head part and a screw rod (a cylinder with external threads), and is matched with the nut and used for fastening two parts with through holes. The connection stress mode is as follows: the device is used for common and hinged holes; the shape of the head is divided into: with hexagonal heads, round heads, square heads, countersunk heads, etc.

The existing self-locking fastening screw (especially disclosed in China patent publication No. 202221997506.0) presses an external thread assembly component through assembly, so that the internal telescopic limiting plate is controlled to outwards overturn and press, and the threaded hole is locked.

The bolt structure among the prior art, though can adjust external structure according to assembled state to improve the locking performance of screw rod through extruded mode, can lead to its bottom and screw internal thread's area of contact less owing to flexible limiting plate adopts the mode of upset deformation, the pulling force that produces is comparatively limited, and fastening effect when locking the screw is lower, and the practicality is lower.

Disclosure of Invention

The present utility model is directed to a self-locking fastening screw, which solves the above-mentioned problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a self-locking fastening screw comprises a screw head main body and a screw body which is constructed at the bottom center of the screw head main body;

the center of the top end of the screw head main body is provided with a groove, a cavity is formed in the screw head main body, and a fastening bolt extending into the cavity is movably arranged in the groove;

rectangular grooves are formed in the bottoms of two sides of the outer edge face of the screw body, pushing blocks are movably arranged in the rectangular grooves, concave seats are formed in the middle of the inner sides of the pushing blocks, and convex rings which are simultaneously abutted to the two concave seats are fixedly arranged at the bottoms of the outer edge face of the fastening bolt.

Preferably, two guide grooves are symmetrically formed in two sides of the rectangular groove, and the two guide grooves are communicated with the cavity.

Preferably, two sides of the pushing block symmetrically form two guide keys towards one end of the fastening bolt, and the guide keys are slidably arranged in the guide grooves.

Preferably, the bottom in the cavity is provided with a threaded hole in the middle, and the fastening bolt is in threaded connection with the threaded hole.

Preferably, one side of the recess is formed with an arc-shaped inclined plane of sixty-five degrees, and the outer edge surface of the pushing block is formed with an annular inclined plane of twenty-five degrees.

Preferably, the top of the outer edge surface of the convex ring is fixedly provided with a magnetic attraction ring, the concave seat and the pushing block are integrally constructed, and the pushing block and the concave seat are in magnetic attraction fit with the magnetic attraction ring.

The utility model has the technical effects and advantages that: the self-locking type fastening screw is beneficial to the arrangement of the fastening bolt provided with the convex ring and the plurality of pushing blocks provided with the concave seats, the screw head main body is screwed to screw the screw main body internally provided with the plurality of pushing blocks into the screw holes to be fixed, and then the fastening bolt is screwed into the screw main body, so that the concave seats on the plurality of pushing blocks are pushed through the convex ring to expand outwards to be abutted against the inner sides of the screw holes, the stability of connection with the screw holes is improved, the fastening effect when the screw holes are locked is greatly improved, and the practicability is higher;

thanks to the arrangement of the fastening bolt and the plurality of pushing blocks, the convex ring is pushed by tightening the fastening bolt to push the two pushing blocks provided with the concave seats to expand outwards, so that the screw holes can be extruded by the two pushing blocks, the self-locking of the screw rod can be completed, and when the screw rod is disassembled, the fastening bolt is screwed out, the two pushing blocks can be retracted by installing the convex ring with the magnetic attraction ring, and the screw rod is convenient to use, convenient to disassemble and high in practicability.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the internal structure of the present utility model;

FIG. 3 is a schematic diagram of the present utility model.

In the figure: 1. a screw head main body; 101. a groove; 2. a screw body; 201. a threaded hole; 3. a fastening bolt; 4. pushing the block; 5. a recess; 6. a convex ring; 7. a guide key; 8. a guide groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In order to improve the fastening effect when deformation locks the screw, as shown in fig. 1, 2 and 3, this self-locking fastening screw comprises a screw head main body 1 and a screw rod main body 2 constructed at the center of the bottom end of the screw head main body 1, a groove 101 is formed in the center of the top end of the screw head main body 1, a cavity is formed in the screw rod main body 2, and a fastening bolt 3 extending into the cavity is movably arranged in the groove 101, rectangular grooves are formed in the bottoms of two sides of the outer edge surface of the screw rod main body 2, a pushing block 4 is movably arranged in the rectangular grooves, a concave seat 5 is centrally formed in the inner side of the pushing block 4, convex rings 6 simultaneously abutted to the two concave seats 5 are fixedly arranged at the bottom end of the outer edge surface of the fastening bolt 3, the screw rod main body 2 with a plurality of pushing blocks 4 installed inside is screwed into the screw hole to be fixed, and then the fastening bolt 3 is screwed into the screw rod main body 2, so that the expansion 5 on the plurality of concave seats 4 is pushed through the convex rings 6, the plurality of pushing blocks 4 are outwards and inwards abutted to the concave seats, the stability is improved, and the practical effect is greatly improved when the locking effect is achieved.

For improving the stability of the pushing block 4 when moving, as shown in fig. 1, 2 and 3, specifically, two guide grooves 8 are symmetrically formed on two sides of the rectangular groove, and the two guide grooves 8 are all communicated with the cavity, two guide keys 7 are symmetrically formed on two sides of the pushing block 4 towards one end of the fastening bolt 3, the guide keys 7 are slidably arranged in the guide grooves 8, and when the pushing block 4 moves, a plurality of guide keys 7 on two sides of the pushing block can respectively slide in the guide grooves 8, so that the stability of the pushing block 4 when moving is greatly improved, and the practicability is higher.

For the release and the withdrawal of push block 4 in order to use repeatedly, as shown in fig. 1, fig. 2, fig. 3, specifically, screw hole 201 has been seted up in the middle to the bottom in the cavity, and fastening bolt 3 threaded connection is in screw hole 201, one side of recess 5 is formed with sixty-five degree arc inclined plane, and is formed with twenty-five degree cyclic annular inclined plane on the outer fringe face of push block 4, the outer fringe face top fixed mounting of bulge loop 6 has the magnetism to inhale the ring, and recess 5 and push block 4 adopt integrative structure to form, push block 4 and recess 5 are inhaled the cooperation with magnetism to inhale the ring magnetism, promote bulge loop 6 through tightening fastening bolt 3 in order to push two push blocks 4 that install recess 5 outwards to the accessible push block 4 extrudes the screw hole, can accomplish the auto-lock to the screw rod, and when dismantling, unscrewing fastening bolt 3, can accomplish the withdrawal to two push blocks 4 through installing the bulge loop 6 that the magnetism is inhaled the ring, convenient to use, and the practicality is stronger.

Working principle: this from locking-type fastening screw, during the use, screw head main part 1 with the screw rod main part 2 of will being constructed is twisted in the screw of preparation installation through the instrument, then twist fastening bolt 3, thereby screw fastening bolt 3 to screw in screw hole 201, push recess 5 on a plurality of push blocks 4 through bulge loop 6, in order to make a plurality of push blocks 4 outwards expand, the butt is in the inboard of screw, thereby improve the stability of being connected with the screw, fastening effect when locking the screw has been improved greatly, and during the dismantlement, can screw out fastening bolt 3, can accomplish the return to two push blocks 4 through bulge loop 6 that installs the magnetism and inhale the ring, and is convenient to use, convenient to detach, the practicality is stronger.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims (6)

1. The self-locking fastening screw comprises a screw head main body (1) and a screw body (2) which is constructed at the bottom center of the screw head main body (1);

the method is characterized in that: a groove (101) is formed in the center of the top end of the screw head main body (1), a cavity is formed in the screw body (2), and a fastening bolt (3) extending into the cavity is movably arranged in the groove (101);

rectangular grooves are formed in the bottoms of two sides of the outer edge face of the screw body (2), pushing blocks (4) are movably arranged in the rectangular grooves, concave seats (5) are formed in the middle of the inner sides of the pushing blocks (4), and convex rings (6) which are simultaneously abutted to the two concave seats (5) are fixedly arranged at the bottoms of the outer edge faces of the fastening bolts (3).

2. A self-locking fastening screw as claimed in claim 1, wherein: two guide grooves (8) are symmetrically formed in two sides of the rectangular groove, and the two guide grooves (8) are communicated with the cavity.

3. A self-locking fastening screw as claimed in claim 2, wherein: two sides of the pushing block (4) are symmetrically provided with two guide keys (7) towards one end of the fastening bolt (3), and the guide keys (7) are slidably arranged in the guide grooves (8).

4. A self-locking fastening screw as claimed in claim 1, wherein: threaded holes (201) are formed in the middle of the bottom end in the cavity, and the fastening bolts (3) are in threaded connection with the threaded holes (201).

5. A self-locking fastening screw as claimed in claim 1, wherein: one side of the recess (5) is provided with an arc inclined plane with sixty-five degrees, and the outer edge surface of the pushing block (4) is provided with an annular inclined plane with twenty-five degrees.

6. A self-locking fastening screw as claimed in claim 1, wherein: the top of the outer edge surface of the convex ring (6) is fixedly provided with a magnetic attraction ring, the concave seat (5) and the pushing block (4) are integrally constructed, and the pushing block (4) and the concave seat (5) are magnetically attracted and matched with the magnetic attraction ring.