CN213088432U

CN213088432U - Expansion anchor bolt

Info

Publication number: CN213088432U
Application number: CN202021761017.6U
Authority: CN
Inventors: 郑爱龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-04-30
Anticipated expiration: 2030-08-21

Abstract

The utility model provides an expansion anchor bolt, including stay tube and peg, internal thread section has been seted up on the inside wall of stay tube, the peg includes interconnect and coaxial arrangement's linkage segment and cooperation section, be provided with first external screw thread section on the linkage segment, be provided with second external screw thread section on the cooperation section, the screw thread nominal diameter of first external screw thread section is greater than the screw thread nominal diameter of second external screw thread section, second external screw thread section screw connection is in the internal thread section, and the cooperation section supports and supports on one end of stay tube; the supporting pipe is sleeved with an expansion sleeve and a fastening sleeve which are matched with each other, and the first external thread section is spirally connected with a nut which is used for pressing the expansion sleeve and the fastening sleeve mutually. After drilling, the supporting pipe is firstly knocked into the hole, the bolt rod is then in threaded connection with the supporting pipe, connecting threads between the bolt rod and the supporting pipe are not easy to damage, the bolt rod can be enabled to be screwed out when the expansion anchor bolt is not used, and safety is relatively high.

Description

Expansion anchor bolt

Technical Field

The utility model relates to a building fastener, especially an expansion anchor bolt.

Background

The expansion anchor bolt is used as a building fastener and widely applied to the aspects of shelf fixation, external stone, door and window installation, building decoration installation and the like.

The traditional expansion anchor bolt is usually difficult to pull out after use, and when the traditional expansion anchor bolt is not needed to be used subsequently, a section of protruding bolt body is left on the wall body of a building, so that certain potential safety hazard exists. Chinese utility model patent publication No. CN200993144Y discloses an expansion anchor bolt, which comprises an anchor bolt rod and at least one expansion sleeve with expansion parts formed at both ends, wherein both ends of the expansion sleeve are connected with fixing sleeves, and one end of the fixing sleeve connected with the expansion parts of the expansion sleeve forms a top block for spreading the expansion parts; the expansion sleeve and the fixed sleeve are sleeved on the anchor bolt rod; and the fixing sleeve at the end along the direction of insertion of the anchor rod into the borehole of the building is connected to the end of the anchor rod in a screw-fit manner; the outer end part of the anchor bolt rod inserted into the drilling direction of the building is sleeved with a nut in a threaded fit mode. This expansion anchor bolt is when not using, can unscrew the crab-bolt pole, can not leave the protruding portion on the building surface, can solve above-mentioned problem to a certain extent, however, because its fixing sleeve that inserts the terminal of building drilling direction along the crab-bolt pole is connected with crab-bolt pole end with screw-thread fit's mode, the in-process of knocking into the crab-bolt pole again behind the drilling, the screw thread between fixing sleeve and the crab-bolt pole is probably out of shape under the effect of percussion force, lead to follow-up crab-bolt pole to be difficult to unscrew from fixing sleeve, lead to it still need to leave one section convex bolt body on the wall body of building, still have certain potential safety hazard.

In view of the above, the present applicant has made an intensive study on the structure of an expansion anchor, and has made this invention.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a security is higher expansion anchor relatively.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an expansion anchor bolt comprises a supporting tube and a bolt rod, wherein an inner threaded section is formed in the inner side wall of the supporting tube, the bolt rod comprises a connecting section and a matching section which are mutually and integrally connected and coaxially arranged, a first outer threaded section is arranged on the connecting section, a second outer threaded section is arranged on the matching section, the nominal diameter of the thread of the first outer threaded section is larger than that of the thread of the second outer threaded section, the second outer threaded section is spirally connected to the inner threaded section, and the matching section abuts against one end of the supporting tube; the supporting pipe is sleeved with an expansion sleeve and a fastening sleeve which are matched with each other, and the first external thread section is spirally connected with a nut which is used for pressing the expansion sleeve and the fastening sleeve mutually.

As an improvement of the utility model, the cooperation section is kept away from the one end an organic whole of linkage segment is connected with the circular cone head, the lateral wall of stay tube with the position department that the circular cone head corresponds set up at least one with the slide opening of the hole intercommunication of stay tube, sliding connection has the bolt in the slide opening, the one end of bolt be provided with circular cone head complex inclined guide surface.

As an improvement of the utility model, the bolt is kept away from the one end of oblique guide surface is provided with the sawtooth.

As an improvement of the utility model, the expansion sleeve with the adapter sleeve has more than two respectively, just the expansion sleeve with the adapter sleeve is followed the length direction of stay tube is arranged in turn in proper order.

As an improvement of the present invention, one of the fastening sleeves abuts against the plug pins.

As an improvement of the utility model, the inflation cover is including cover body and a plurality of difference a body coupling in the inflation piece at cover body both ends, each one side that the corresponding cover body was kept away from to the inflation piece all is provided with the orientation the guide face of stay tube, the both ends of adapter sleeve be provided with respectively with guide face complex top pressure face.

As an improvement of the utility model, be close to relatively the nut expand the cover orientation one side of nut still is provided with the simultaneous cover and establishes stay tube with press the cover on the first external screw thread section, the nut directly or indirectly compresses tightly press on the cover.

As an improvement of the utility model, the outer side wall of the supporting tube is a non-smooth wall.

As an improvement of the utility model, the first external thread section is provided with two notches which are symmetrically arranged mutually.

As an improvement of the present invention, the pin is provided with a relief groove at a position between the first external thread section and the second external thread section.

Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has:

1. through setting up the stay tube and being provided with two sections with the peg, can be earlier in the stay tube knock-in hole after the drilling, again with peg screwed connection on the stay tube, connecting thread between the two is not fragile, can ensure that the peg can be unscrewed when not using expansion anchor, the security is higher relatively.

2. Through setting up the bolt, help improving the cohesion between expansion anchor and the building to make expansion anchor can obtain reliable fastening force.

3. Through setting up a plurality of expansion sleeves, the tie point between multiplicable expansion anchor and the building further improves the cohesion between expansion anchor and the building.

4. Through setting up scarce groove, be convenient for adopt rotatory gag lever post of instrument such as spanner.

Drawings

Fig. 1 is a schematic structural view of an expansion anchor of the present invention;

fig. 2 is an exploded view of the expansion anchor of the present invention;

fig. 3 is a schematic view of the sectioning structure of the expansion anchor of the present invention.

The designations in the figures correspond to the following:

10-supporting tube; 11-a slide hole;

12-a bolt; 20-a bolt rod;

21-a connecting segment; 22-a mating segment;

23-a conical head; 30-expansion sleeve;

31-set of body; 32-an intumescent sheet;

40-fastening sleeve; 50-a nut;

51-pressing sleeve; 52-spacer.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 3, the present exemplary embodiment provides an expansion anchor comprising a support tube 10 and a bolt rod 20, wherein the support tube 10 is provided with an expansion sleeve 30 and a fastening sleeve 40 which are fitted to each other.

The inner side wall of the support tube 10 is provided with an inner thread section, and the outer side wall of the support tube 10 is a non-smooth wall, so as to improve the holding force of the expansion sleeve 30 and the fastening sleeve 40 which are mutually compressed on the support tube 10.

The bolt 20 comprises a connecting section 21 and a matching section 22 which are integrally connected with each other and coaxially arranged, and the connecting section 21 is exposed to the outside in use and is used for being connected with other objects. The connecting section 21 is provided with a first external thread section, the matching section 22 is provided with a second external thread section, wherein the nominal diameter of the first external thread section is larger than that of the second external thread section, and the major diameter of the first external thread section is equal to the outer diameter of the support tube 10. The second external thread section is screwed onto the internal thread section of the support tube 10, and one end of the fitting section 22 abuts against one end of the support tube 10, i.e. the first external thread section 21 cannot be screwed into the support tube 10.

Furthermore, a nut 50 for pressing the expansion sleeve 30 and the tightening sleeve 40 against each other is screwed onto the first external thread section 21, and the thread 50 is a conventional external hexagonal nut. Of course, since the nut 50 cannot move on the support tube 10, at least one of the expansion sleeve 30 and the fastening sleeve 40 should be fitted over the first external thread section 21 at the same time, or a transition structure should be provided between the nut 50 and the expansion sleeve 30 or the fastening sleeve 40 so that the nut 50 can press the expansion sleeve 30 and the fastening sleeve 40 against each other.

Preferably, the first external thread section is provided with two notches which are symmetrically arranged with each other so as to be used as a wrench position. Meanwhile, the bolt 20 is provided with a relief at a position between the first external thread section and the second external thread section, which facilitates the processing of the second external thread section.

Preferably, a conical head 23 is integrally connected to an end of the fitting section 22 away from the connecting section 21, and the conical head may be conical or frustum-shaped, and an end with a relatively larger diameter is connected to the fitting section 22. The side wall of the support tube 10 is provided with at least one sliding hole 11 communicated with the inner hole of the support tube 10 at a position corresponding to the conical head 23, in this embodiment, there are four sliding holes 11, the four sliding holes 11 are uniformly distributed by taking the axis of the support tube 10 as the center, each sliding hole 11 is slidably connected with a plug 12, one end of the plug 12 is provided with an inclined guide surface matched with the conical head 23, one end of the plug 12 away from the inclined guide surface is provided with a saw tooth (not shown in the figure), of course, the cross-sectional shapes of the sliding holes 11 and the plug 12 are preferably non-circular, so as to avoid that the inclined guide surface is difficult to be matched with the conical head 23 due to the rotation of the plug 12.

The expansion sleeve 30 comprises a sleeve body 31 and a plurality of expansion pieces 32 integrally connected to two ends of the sleeve body 31, in this embodiment, two ends of the sleeve body 31 are connected to the plurality of expansion pieces 32, and the expansion pieces 32 at each end are uniformly distributed by taking the axis of the sleeve body 31 as the center. The side of each expansion piece 32 remote from the corresponding sleeve body 31 is provided with a guide surface toward the support pipe 10.

The both ends of adapter sleeve 40 are provided with respectively with guide face complex top pressure face, during the use, after two adjacent inflation covers 30 and adapter sleeve 40 are compressed tightly in opposite directions along the axial, the top pressure face can penetrate between the guide face that corresponds and the lateral wall of stay tube 10, and then with expansion sheet 32 toward the direction jack-up of keeping away from stay tube 10, make it compress tightly on the pore wall of building, realize the expansion function.

Preferably, there are more than two expansion sleeves 30 and two fastening sleeves 40, respectively, in this embodiment, there are two expansion sleeves 30 and fastening sleeves 40, and the expansion sleeves 30 and the fastening sleeves 40 are alternately arranged in sequence along the length direction of the support tube 10. In this embodiment, one of the clamping sleeves 40 (i.e., the clamping sleeve 40 furthest from the nut 50) bears against each bolt 12. Thus, when the nut 50 is tightened, the tightening sleeve 40 can press each plug 12, i.e., limit the tightening sleeve 40, and also prevent the plug 12 from loosening through the tightening sleeve 40. In addition, in the present embodiment, a pressing sleeve 51 is further provided on the side of the expansion sleeve 30 facing the nut, which is relatively close to the nut 50, and the pressing sleeve 51 is simultaneously sleeved on the support tube 10 and the first external thread section, and the nut 50 is directly pressed on the pressing sleeve 51 or indirectly pressed on the pressing sleeve 51 through a gasket 52.

Before use, the bolt 12 penetrates into the corresponding sliding hole 11 and slides to the inner hole direction of the support tube 10 to the limit position, and then the expansion sleeves 30 and the fastening sleeve 40 are respectively sleeved on the support tube 10; when in use, holes are drilled in a building, and then the support tube 10 sleeved with the expansion sleeve 30 and the fastening sleeve 40 is completely knocked into the holes; then the bolt rod 20 is screwed into the internal thread hole of the support tube 10, in the process, the conical head 23 of the bolt rod 20 can push each bolt 12 to slide outwards and be embedded into the hole wall; finally, the washer 52 is sleeved on the bolt 20 and locked by the nut 50, and in the process, each expansion sleeve 30 expands under the action of the corresponding fastening sleeve 40, so that the installation of the expansion anchor bolt is completed.

The present invention has been described in detail with reference to the accompanying drawings, but the embodiments of the present invention are not limited to the above embodiments, and those skilled in the art can make various modifications to the present invention according to the prior art, and these all belong to the protection scope of the present invention.

Claims

1. An expansion anchor bolt is characterized by comprising a supporting tube and a bolt rod, wherein an inner thread section is formed in the inner side wall of the supporting tube, the bolt rod comprises a connecting section and a matching section which are mutually and integrally connected and coaxially arranged, a first outer thread section is arranged on the connecting section, a second outer thread section is arranged on the matching section, the nominal diameter of the thread of the first outer thread section is larger than that of the thread of the second outer thread section, the second outer thread section is spirally connected to the inner thread section, and the matching section abuts against one end of the supporting tube; the supporting pipe is sleeved with an expansion sleeve and a fastening sleeve which are matched with each other, and the first external thread section is spirally connected with a nut which is used for pressing the expansion sleeve and the fastening sleeve mutually.

2. The expansion anchor bolt according to claim 1, wherein a conical head is integrally connected to an end of the fitting section remote from the connecting section, at least one slide hole communicating with an inner hole of the support tube is formed in a position of the side wall of the support tube corresponding to the conical head, a plug pin is slidably connected in the slide hole, and an inclined guide surface fitted with the conical head is provided at one end of the plug pin.

3. The expansion anchor as claimed in claim 2, wherein the end of the bolt remote from the ramp is provided with serrations.

4. The expansion anchor as claimed in claim 2, wherein there are more than two of said expansion sleeves and said tightening sleeves, respectively, and said expansion sleeves and said tightening sleeves are arranged alternately in succession along the length direction of said support tube.

5. Expansion anchor according to claim 4, in which one of the clamping sleeves bears against the plug pin.

6. The expansion anchor as claimed in claim 4, wherein the expansion shell comprises a shell body and a plurality of expansion pieces integrally connected to the two ends of the shell body, respectively, and each expansion piece is provided with a guide surface facing the support tube on a side thereof remote from the corresponding shell body, and the two ends of the tightening shell are provided with respective pressing surfaces engaging with the guide surfaces.

7. Expansion anchor according to claim 6, characterized in that a pressure sleeve is provided on the side of the expansion sleeve facing the nut that is situated relatively close to the nut, said pressure sleeve simultaneously fitting over the support tube and the first external thread section, said nut being pressed directly or indirectly against said pressure sleeve.

8. The expansion anchor as claimed in one of claims 1 to 7, wherein the outer side wall of the support tube is a non-smooth wall.

9. Expansion anchor according to one of the claims 1 to 7, in which the first outer thread section is provided with two grooves arranged symmetrically to one another.

10. Expansion bolt according to any one of claims 1-7, wherein the bolt shank is provided with a relief at a location between the first outer thread section and the second outer thread section.