CN214036449U

CN214036449U - High-strength stable cement bolt

Info

Publication number: CN214036449U
Application number: CN202023071867.6U
Authority: CN
Inventors: 应水军
Original assignee: Haiyan Yuanyang Standard Piece Co ltd
Current assignee: Haiyan Yuanyang Standard Piece Co ltd
Priority date: 2020-12-19
Filing date: 2020-12-19
Publication date: 2021-08-24
Anticipated expiration: 2030-12-19

Abstract

The utility model discloses a high strength type cement bolt that stabilizes, including bolt head, screw rod and locking portion, the locking portion is located the one end of keeping away from the bolt head on the screw rod, the screw rod is equipped with first screw thread section on being close to one side of locking portion, be equipped with the second screw thread section between first screw thread section and the bolt head, the pitch of second screw thread section is not more than the half of the pitch of first screw thread section, be equipped with the concave screw thread that sets up with first screw thread section is crisscross on the screw rod, be equipped with the gear cutting structure that a plurality of asymmetries and contained angle are less than ninety degrees on the first screw thread section. The utility model increases the locking force by designing two thread sections with different thread pitches; a sawtooth inclined plane is designed on the upper thread section, and a gear cutting structure is designed on the lower thread section to increase locking fastening force; the concave thread is designed to increase contact and occlusion with cement tissues, so that gaps are not easy to generate; the tooth bodies on the two sides of the concave thread assist in reducing resistance and positioning locking, and bolt installation and fixation are facilitated.

Description

High-strength stable cement bolt

Technical Field

The utility model relates to a technical field of fastener, especially cement bolt's technical field.

Background

The existing cement bolt in the market has poor screwing effect when being locked into concrete due to larger screw tooth space, and the bolt is easy to skew to generate deflection, thereby causing the problems of time and labor waste and influence on the operation efficiency. Simultaneously produce the space easily between screw rod and the cement, lead to during foreign matter, aqueous vapor get into this gap, cause the quick corrosion of this cement bolt easily, reduce life.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem among the prior art, provide a high strength type cement bolt that stabilizes, can be through the structure innovation design of incisor tooth, thread to design concave screw thread increase with the contact and the interlock of cement tissue, be difficult for producing the space, promote the closure fastening force of product.

In order to realize the above-mentioned purpose, the utility model provides a firm type cement bolt of high strength, including bolt head, screw rod and locking portion, locking portion is located the one end of keeping away from the bolt head on the screw rod, the screw rod is close to and is equipped with first screw thread section on one side of locking portion, be equipped with the second screw thread section between first screw thread section and the bolt head, the pitch of second screw thread section is not more than the half of the pitch of first screw thread section, be equipped with the concave thread that sets up with first screw thread section is crisscross on the screw rod, be equipped with the gear cutting structure that a plurality of asymmetries and contained angle are less than ninety degrees on the first screw thread section, gear cutting structure establishes the direction setting along the ring of first screw thread section, the second screw thread section comprises a plurality of threads, and each thread have respectively one by last tooth face that the screw rod downward sloping extends, one by the lower tooth face that the screw rod, And the lower tooth surface is provided with a plurality of sawtooth inclined surfaces.

Preferably, a plurality of tooth bodies are annularly arranged on two sides of the concave thread, the outer diameter of each tooth body is smaller than that of the first thread section, the tooth bodies are conical, and one ends of the tooth bodies, far away from the bolt head, are pointed ends.

Preferably, the included angle formed by the intersection of the downward extension of the upper dental surface and the outward extension baseline of the dental crest is smaller than the included angle formed by the upward extension of the lower dental surface and the outward extension baseline of the dental crest.

Preferably, the screw is provided with an annular groove, and the annular groove is positioned on one side of the screw close to the locking part.

The utility model has the advantages that: the utility model increases the locking force by designing two thread sections with different thread pitches; a sawtooth inclined plane is designed on the upper thread section, and a gear cutting structure is designed on the lower thread section to increase locking fastening force; the concave thread is designed to increase contact and occlusion with cement tissues, so that gaps are not easy to generate; the tooth bodies on the two sides of the concave thread assist in reducing resistance and positioning locking, and bolt installation and fixation are facilitated.

The features and advantages of the present invention will be described in detail by embodiments with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of a high-strength stable cement bolt of the present invention;

FIG. 2 is a schematic view of a tooth cutting structure of the high-strength stable cement bolt of the present invention;

fig. 3 is a partially enlarged schematic view of a portion a in fig. 1.

In the figure: 1-bolt head, 2-screw rod, 3-locking part, 4-first thread section, 5-second thread section, 6-concave thread, 7-annular groove, 41-cutting tooth structure, 51-screw tooth, 52-upper tooth surface, 53-lower tooth surface, 54-crest, 55-lower tooth surface and 61-tooth body.

Detailed Description

Referring to fig. 1, 2 and 3, the utility model relates to a high strength type cement bolt that stabilizes, including bolt head 1, screw rod 2 and locking portion 3, locking portion 3 is located the one end of keeping away from bolt head 1 on the screw rod 2, be equipped with first screw thread section 4 on one side that screw rod 2 is close to locking portion 3, be equipped with second screw thread section 5 between first screw thread section 4 and the bolt head 1, the pitch of second screw thread section 5 is not more than the half of the pitch of first screw thread section 4, be equipped with the concave screw thread 6 with the crisscross setting of first screw thread section 4 on the screw rod 2, be equipped with a plurality of asymmetries and contained angle and be less than ninety degrees incised tooth structure 41 on the first screw thread section 4, incised tooth structure 41 sets up in the direction of establishing of the ring of first screw thread section 4, second screw thread section 5 comprises a plurality of threads 51, and each thread 51 have respectively one by the last tooth face 52 that screw rod 2 downward sloping extends, The screw is characterized by comprising a lower tooth surface 53 and a crest 54, wherein the lower tooth surface 53 extends in an upward inclined mode through the screw 2, the crest 54 is formed by connecting the upper tooth surface 52 with the lower tooth surface 53, a plurality of sawtooth inclined surfaces 55 are arranged on the lower tooth surface 53, a plurality of tooth bodies 61 are annularly arranged on two sides of the concave thread 6, the outer diameter of each tooth body 61 is smaller than that of the first thread section 4, the tooth bodies 61 are conical, one end, away from the bolt head 1, of each tooth body 61 is a pointed end, an included angle formed by the intersection of the downward extension of the upper tooth surface 52 and a base line extending outwards of the crest 54 is smaller than an included angle formed by the intersection of the upward extension of the lower tooth surface 53 and the base line of the crest 54, an annular groove 7 is arranged on the screw 2, and the annular groove 7 is located on one side, close to the locking part 3, of the screw 2.

The utility model discloses the working process:

in the working process of the high-strength stable cement bolt, the screw pitch of the second thread section 5 is smaller than that of the first thread section 4, so that a self-locking structure is formed; the sawtooth inclined plane 55 arranged on the second thread section 5 and the gear cutting structure 41 arranged on the first thread section 4 effectively improve the locking force of the bolt and prevent the bolt from falling off; the concave thread 6 increases the contact and occlusion with cement tissues, so that gaps are not easy to generate; the tooth bodies 61 on the two sides of the concave thread 6 assist in reducing resistance and positioning locking, and installation and fixation of the cement bolt are facilitated.

The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.

Claims

1. The utility model provides a firm type cement bolt of high strength which characterized in that: the bolt comprises a bolt head (1), a screw rod (2) and a locking part (3), wherein the locking part (3) is positioned at one end, far away from the bolt head (1), of the screw rod (2), a first thread section (4) is arranged on one side, close to the locking part (3), of the screw rod (2), a second thread section (5) is arranged between the first thread section (4) and the bolt head (1), the thread pitch of the second thread section (5) is not larger than one half of the thread pitch of the first thread section (4), concave threads (6) which are staggered with the first thread section (4) are arranged on the screw rod (2), a plurality of asymmetrical tooth cutting structures (41) with included angles smaller than ninety degrees are arranged on the first thread section (4), the tooth cutting structures (41) are arranged along the annular arrangement direction of the first thread section (4), and the second thread section (5) is composed of a plurality of screw teeth (51), each thread (51) is provided with an upper thread surface (52) which is obliquely extended downwards by the screw rod (2), a lower thread surface (53) which is obliquely extended upwards by the screw rod (2) and a thread crest (54) which is formed by connecting the upper thread surface (52) and the lower thread surface (53), and a plurality of sawtooth inclined surfaces (55) are arranged on the lower thread surface (53).

2. The high-strength firm cement bolt according to claim 1, wherein: the novel bolt is characterized in that a plurality of tooth bodies (61) are annularly arranged on two sides of the concave thread (6), the outer diameter of each tooth body (61) is smaller than that of the first thread section (4), the tooth bodies (61) are conical, and one ends, far away from the bolt head (1), of the tooth bodies (61) are pointed ends.

3. The high-strength firm cement bolt according to claim 1, wherein: the included angle formed by the downward extension of the upper tooth surface (52) and the intersection of the base line of the outward extension of the crest (54) is smaller than the included angle formed by the upward extension of the lower tooth surface (53) and the intersection of the base line of the crest (54).

4. The high-strength firm cement bolt according to claim 1, wherein: an annular groove (7) is formed in the screw rod (2), and the annular groove (7) is located on one side, close to the locking portion (3), of the screw rod (2).