CN219452667U

CN219452667U - Concrete anchor bolt

Info

Publication number: CN219452667U
Application number: CN202320310133.3U
Authority: CN
Inventors: 王小飞
Original assignee: Handan Feite Metal Products Co ltd
Current assignee: Handan Feite Metal Products Co ltd
Priority date: 2023-02-24
Filing date: 2023-02-24
Publication date: 2023-08-01
Anticipated expiration: 2033-02-24

Abstract

The utility model discloses a concrete anchor bolt, which comprises a head part and a screw rod which are integrally arranged, wherein a first thread and a second thread are arranged at one end of the screw rod far away from the head part, a third thread is also arranged at one end of the screw rod far away from the head part, the first thread, the second thread and the third thread are arranged on the screw rod in a three-wire thread mode, the outer diameters of the first thread, the second thread and the third thread are all larger than the aperture of a preset hole for placing the anchor bolt, and the outer diameter of the first thread is larger than the outer diameters of the second thread and the third thread. The utility model not only enhances the anchoring effect, but also ensures that the screwing torque is not too large, is easy to screw in, is suitable for anchoring connection of all concrete, and is especially suitable for anchoring connection of middle-low grade concrete.

Description

Concrete anchor bolt

Technical Field

The utility model relates to an anchor bolt, in particular to a concrete anchor bolt.

Background

In the construction field, concrete anchors are commonly used to secure panels, keels and other objects to concrete. Specifically, the fixing effect is achieved by placing a concrete anchor bolt fixed with other objects into a hole formed in the concrete in advance. The Chinese patent publication No. CN103452992B discloses an anchor bolt, which comprises an anchor bolt head and a screw rod, wherein a double-thread comprising a thread A (big tooth) and a thread B (small tooth) is arranged on the screw rod, the outer diameter of the small tooth is equal to the aperture of a preset hole, the outer diameter of the big tooth is larger than the aperture of the preset hole, when the anchor bolt is screwed in, the anchor bolt is cut on the preset hole wall through the big tooth, so as to play an anchoring effect, and meanwhile, cutting scraps are left between the preset hole and the screw rod and separated by the small tooth.

In the practical use process, the anchor bolt has a good anchoring effect on high-grade concrete (concrete with the hardness being more than C35) but has a poor anchoring effect on medium-grade and low-grade concrete (concrete with the hardness being less than C35) in daily civil buildings, and the medium-grade and low-grade concrete is often used more commonly because the anchor bolt has a cutting effect on the inner wall of the preset hole only by the big teeth and the cutting scraps are insufficient to fill the gap between the screw and the preset hole, so that the small teeth are hardly provided with an anchoring effect, and the anchoring effect is realized only by the big teeth. In addition, as the actual use scene of the concrete is often accompanied by the interference of blowing, sun drying, rain and the like, the actual hardness of the concrete is often lower than the laboratory measurement hardness, so that the anchor bolt has poor anchoring effect in the actual use.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model aims to provide a concrete anchor bolt so as to achieve the purposes of enhancing the anchoring force and improving the anchoring effect.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a concrete anchor bolt, includes head and the screw rod of integrative setting, the one end that the head was kept away from to the screw rod is provided with first screw thread and second screw thread, the one end that the head was kept away from to the screw rod still is provided with the third screw thread, first screw thread, second screw thread, third screw thread are three-wire thread arrangement on the screw rod, the external diameter of first screw thread, second screw thread, third screw thread all is greater than the aperture that is used for imbedding the hole of predetermineeing of anchor bolt, the external diameter of first screw thread is greater than the external diameter of second screw thread, third screw thread.

As a limitation of the present utility model: the outer diameter of the first thread is 1.28-1.38 times of the outer diameter of the screw rod, and the outer diameters of the second thread and the third thread are 1.08-1.1 times of the outer diameter of the screw rod.

As a limitation of the present utility model: the head comprises a stop head close to one end of the screw rod, one end of the stop head, which is far away from the screw rod, is fixedly provided with a bead head for screwing in an anchor bolt, and the end face, which is far away from one end of the screw rod, of the bead head is provided with an internal threaded hole.

As a limitation of the present utility model: the end face of the retaining head, which is close to one end of the screw rod, is radially provided with retaining ribs.

As a limitation of the present utility model: the head is countersunk.

As a limitation of the present utility model: the head is of a flange head type.

As a limitation of the present utility model: the first thread is provided with a serrated edge at one end away from the head.

Due to the adoption of the technical scheme, compared with the prior art, the utility model has the following beneficial effects:

the utility model is also provided with the third thread on the basis of the first thread (big tooth) and the second thread (small tooth), the outer diameter of the first thread is larger, the outer diameters of the second thread and the third thread are smaller, and the outer diameters of the three threads are larger than the aperture of the preset hole, namely, in the screwing process, the first thread, the second thread and the third thread cut the inner wall of the preset hole, the first thread plays a main anchoring effect, and meanwhile, the second thread and the third thread are embedded into the inner wall of the preset hole, so that the anchoring effect is enhanced, the screwing torque is not excessively increased (the screwing torque is obviously increased and the screwing is difficult if the outer diameters of the three threads are larger), and the utility model is more suitable for the anchoring connection of middle-low grade concrete; in addition, the outer diameter of the screw is slightly smaller than the aperture of the preset hole, so that cut concrete scraps are reserved between the screw and the preset hole, the anchoring effect is enhanced, and meanwhile, the arrangement of the sawtooth blade can play a polishing role in screwing in, so that the anchor bolt is screwed in more smoothly.

In conclusion, the utility model not only enhances the anchoring effect, but also ensures that the screwing torque is not too large and is easy to screw in, thereby being applicable to the anchoring connection of all concrete, in particular to the anchoring connection of middle-low grade concrete.

Drawings

The utility model will be described in more detail below with reference to the accompanying drawings and specific examples.

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

FIG. 2 is a schematic structural diagram of embodiment 2 of the present utility model;

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

in the figure: 1-head, 11-backstop head, 12-backstop edge, 13-bead head, 14-internal thread hole, 2-screw, 3-first screw thread, 4-second screw thread, 5-third screw thread, 6-sawtooth sword.

Detailed Description

Preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. It should be understood that the concrete anchors described herein are preferred embodiments and are presented for purposes of illustration and explanation only and are not to be construed as limiting the utility model.

The terms or positional relationships of the "upper", "lower", "left", "right" and the like in the present utility model are based on the positional relationships of the drawings in the present specification, and are merely for convenience of describing the present utility model and simplifying the description, and are not intended to indicate or imply that the apparatus or element must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the protection of the present utility model.

Example 1 concrete Anchor bolt

This embodiment, shown in fig. 1, is a concrete anchor bolt, comprising a head 1 and a screw 2 integrally provided.

The head 1 of the anchor bolt in this embodiment is a nut type head, the head 1 comprises a retaining head 11 close to one end of the screw 2, the retaining head 11 is of a circular sheet structure integrally arranged with the screw 2, retaining ribs 12 are radially arranged on the end face of the retaining head 11 close to one end of the screw 2, and the retaining ribs 12 can increase friction force between the head 1 and the surface of concrete, so that retaining effect is achieved. Further, the setting direction of the retaining rib 12 can be inclined in the direction opposite to the rotation direction of the screw 2, and the retaining effect is stronger.

Only move back the head and keep away from screw rod 2 one end and set firmly the bead head 13 that is used for the screw in crab-bolt, bead head 13 cross section in this embodiment is regular hexagon, and bead head 13 in this embodiment is outer hexagonal bead head promptly, of course, also can select pentagonal bead head or quadrilateral bead head etc. according to actual conditions. An internal threaded hole 14 is formed in the end face of the bead head 13, which is far away from one end of the screw rod 2, and other structures with external threads can be detachably arranged on the concrete anchor bolt of the embodiment through the internal threaded hole 14.

The screw rod 2 is in a rod shape integrally arranged with the head 1, a first thread 3, a second thread 4 and a third thread 5 which are arranged on the screw rod 2 in a three-thread mode are arranged at one end, far away from the head 1, of the screw rod 2, the outer diameters of the first thread 3, the second thread 4 and the third thread 5 are all larger than the hole diameter of a preset hole for placing an anchor bolt, the hole wall of the preset hole can be embedded in the screw rod during screwing in, an anchoring effect is achieved, the outer diameter of the first thread 3 is larger than the outer diameters of the second thread 4 and the third thread 5, the first thread 3 corresponds to a large tooth, a main anchoring effect is achieved, the second thread 4 and the third thread 5 are small teeth, an auxiliary anchoring effect is achieved, the outer diameter of the first thread 3 is 1.28-1.38 times the outer diameter of the screw rod 2, the outer diameters of the second thread 4 and the third thread 5 are 1.08-1.1 times the outer diameters of the screw rod 2 (in case of an M8 bolt is taken as an example, the hole diameter of the preset hole matched with the screw rod is 8mm, the outer diameter of the screw rod is 7.8mm, the outer diameter of the first thread is 10mm, and the outer diameter of the third thread is 8.5mm; taking an M6 bolt as an example, the diameter of a preset hole matched with the M6 bolt is 6mm, the outer diameter of the screw rod is 5.8mm, the outer diameter of a first thread is 8mm, the outer diameters of a second thread and a third thread are 6.3 mm), the diameter of the preset hole is between the outer diameter of the screw rod 2 and the outer diameters of the second thread 4 and the third thread 5, the second thread 4 and the third thread 5 are embedded into the hole wall of the preset hole after screwing, the screw rod is more suitable for anchoring connection of middle-low grade concrete, the outer diameter of the screw rod 2 is slightly smaller than the diameter of the preset hole, cut concrete scraps can be remained between the screw rod 2 and the preset hole, the anchoring effect is enhanced, the one-large-two-small thread form can not cause too large screwing torque of an anchor bolt due to too much large teeth or influence the anchoring effect due to too much small teeth, a good balance is achieved between the anchoring force and the screwing torque.

Further, the sawtooth edge 6 is arranged at one end, far away from the head 1, of the first thread 3, so that a polishing effect can be achieved during screwing in, and screwing in of the anchor bolt is smoother.

When the embodiment is used, the preset hole is formed in the concrete, the embodiment is screwed into the preset hole, the first thread 3, the second thread 4 and the third thread 5 are embedded into the inner wall of the preset hole, and other objects to be fixed are fixedly arranged on the embodiment through the internal threaded hole 14 of the head 1.

Example 2 concrete Anchor bolt

The present embodiment is a concrete anchor bolt, and the present embodiment has a structure substantially the same as that of embodiment 1, except that the head 1 of the anchor bolt in the present embodiment is a countersunk head, the countersunk head 1 has a structure according to the prior art, and the method of using the present embodiment is described in embodiment 1.

Example 3 concrete Anchor bolt

The present embodiment is a concrete anchor bolt, and the present embodiment has a structure substantially the same as that of embodiment 1, except that in the present embodiment, the head 1 of the anchor bolt is a flange head type head 1, the structure of the flange head type head 1 is the prior art, and the application method of the present embodiment is described in embodiment 1.

Claims

1. The utility model provides a concrete anchor, includes head and the screw rod of integrative setting, the one end that the head was kept away from to the screw rod is provided with first screw thread and second screw thread, its characterized in that: the one end that the head was far away to the screw rod still is provided with the third screw thread, first screw thread, second screw thread, third screw thread are three-wire screw thread and arrange on the screw rod, the external diameter of first screw thread, second screw thread, third screw thread all is greater than the aperture that is used for imbedding the hole of predetermineeing of crab-bolt, the external diameter of first screw thread is greater than the external diameter of second screw thread, third screw thread.

2. The concrete anchor according to claim 1, wherein: the outer diameter of the first thread is 1.28-1.38 times of the outer diameter of the screw rod, and the outer diameters of the second thread and the third thread are 1.08-1.1 times of the outer diameter of the screw rod.

3. The concrete anchor according to claim 2, wherein: the head comprises a stop head close to one end of the screw rod, one end of the stop head, which is far away from the screw rod, is fixedly provided with a bead head for screwing in an anchor bolt, and the end face, which is far away from one end of the screw rod, of the bead head is provided with an internal threaded hole.

4. A concrete anchor according to claim 3, characterized in that: the end face of the retaining head, which is close to one end of the screw rod, is radially provided with retaining ribs.

5. The concrete anchor according to claim 2, wherein: the head is countersunk.

6. The concrete anchor according to claim 2, wherein: the head is of a flange head type.

7. The concrete anchor according to any one of claims 1 to 6, characterized in that: the first thread is provided with a serrated edge at one end away from the head.