CN217842281U

CN217842281U - Two-piece expansion bolt assembly

Info

Publication number: CN217842281U
Application number: CN202221809152.2U
Authority: CN
Inventors: 徐祝彬
Original assignee: Guizhou Xianlong Fastener Co ltd
Current assignee: Guizhou Xianlong Fastener Co ltd
Priority date: 2022-07-14
Filing date: 2022-07-14
Publication date: 2022-11-18
Anticipated expiration: 2032-07-14

Abstract

The utility model discloses a two-piece expansion bolt subassembly, including screw and expansion sleeve, the screw is the integral type structure of compriseing screwhead, cone section and screw thread section, the expansion sleeve is the integral type structure of compriseing interior circular cone pipe and pipe, and the hole tapering of interior circular cone pipe is unanimous with the tapering of cone section, has seted up a set of expansion joint on the lateral wall of interior circular cone pipe including, is provided with at the oral area of pipe with screw thread section complex screw hole. The expansion sleeve is installed with the opening of the expansion sleeve facing the outside of the installation hole, and the expansion sleeve is opened through the conical section on the screw rod part, so that the expansion sleeve is fixed after being expanded in the installation hole; because the expansion sleeve and the screw rod part are all arranged in the mounting hole, the screw head is only exposed, the rod part of the expansion sleeve and the screw is prevented from contacting with external air or rainwater, the expansion sleeve and the screw are prevented from being rusted, and the later-stage disassembly is facilitated.

Description

Two-piece expansion bolt assembly

Technical Field

The utility model relates to a two-piece expansion bolt subassembly belongs to fastener technical field.

Background

At present, the used expansion bolt comprises a bolt, a nut and an expansion sleeve which are matched with the bolt, wherein the tail end of the bolt is a circular truncated cone-shaped nail head or is set as a circular truncated cone-shaped nut, one end of the expansion sleeve, which is close to the circular truncated cone-shaped nail head or the circular truncated cone-shaped nut, is provided with a plurality of expansion joints, namely one end of the expansion sleeve is divided into a plurality of expansion ribs, and the other end of the expansion sleeve is tubular; when the expansion sleeve is used, the screw or the nut is screwed, and the circular truncated cone-shaped nail head or the circular truncated cone-shaped nut is pressed into the expansion sleeve from the small end to the large end to force the expansion rib to expand and deform and expand in the mounting hole, so that the purpose of fixing is achieved.

However, the conventional expansion bolts have the following drawbacks:

1. because the expansion sleeve expands in the mounting hole and does not expose out of the mounting hole, the expansion bolt can only be forcibly pulled to pull the round table type nail head or the round table type nut, so that the expansion sleeve can be further expanded and tightly clamped in the mounting hole, under the condition, if the tension is continuously increased, the wall surface and various carriers are inevitably damaged, and the expansion bolt forcibly taken out is difficult to reuse, thereby wasting resources;

2. the existing expansion bolt at least comprises a screw, a nut and an expansion sleeve, and has the disadvantages of complex structure, difficult processing and high production cost;

3. the thread part of the existing expansion bolt is exposed outside the mounting hole and is easy to contact with air or rainwater, so that the thread part is corroded and is more difficult to disassemble;

4. the opening of the expansion sleeve of the existing expansion bolt faces the mounting hole, so that a barb cannot be formed, and the risk of falling out of the mounting hole is possibly caused.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a two-piece expansion bolt assembly, this expansion bolt is simple structure not only, and is fixed firm, simple to operate, and only two parts moreover, the processing cost is low, can also dismantle back used repeatedly.

The utility model discloses a constitute like this: the utility model provides a two-piece expansion bolt subassembly, includes screw and expansion sleeve, the screw is the integral type structure of compriseing screwhead, cone section and screw thread section, the expansion sleeve is the integral type structure of compriseing interior circular cone pipe and pipe, and the hole tapering of interior circular cone pipe is unanimous with the tapering of cone section, has seted up a set of expansion joint on the lateral wall of interior circular cone pipe, is provided with the screw hole with screw thread section complex at the oral area of pipe.

Further, the minimum diameter of the conical section is larger than the diameter of the threaded section.

Furthermore, the length of the expansion joint is greater than or equal to that of the inner conical pipe, and the length of the conical section is greater than that of the expansion joint.

Furthermore, the screw head is a hexagonal head or a hook, and a flange plate is arranged between the screw head and the conical section.

Since the technical scheme is used, the utility model has the advantages of:

1. the expansion sleeve is installed with the opening of the expansion sleeve facing the outside of the installation hole, and the expansion sleeve is opened through the conical section on the screw rod part, so that the expansion sleeve is fixed after being expanded in the installation hole; because the expansion sleeve and the screw rod part are all arranged in the mounting hole, only the screw head is exposed, the expansion sleeve and the screw rod part are prevented from contacting with external air or rainwater, the expansion sleeve and the screw rod part are prevented from being rusted, and the later-stage disassembly is convenient;

2. when the expansion bolt is disassembled, only the bolt is loosened, the conical section on the rod part of the bolt is separated from the expansion sleeve, and the expansion sleeve retracts to the original shape, so that the whole expansion bolt can be smoothly taken out from the mounting hole, the reuse is convenient, the pollution is avoided, and the resource is saved;

3. the utility model only consists of two parts, namely a screw and an expansion sleeve, and has simple structure and low processing cost;

4. because the opening of the expansion sleeve is installed towards the outside of the mounting hole, after the opening of the expansion sleeve is opened and expanded, the opening forms a barb shape in the mounting hole, the expansion sleeve is effectively prevented from being separated from the mounting hole, and the fixing reliability is improved.

Drawings

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

FIG. 2 is a schematic view of a screw;

fig. 3 is a schematic structural diagram of the expansion sleeve.

Description of the reference numerals: 1-screw, 2-expansion sleeve, 101-screw head, 102-conical section, 103-threaded section, 201-inner conical pipe, 202-circular pipe, 203-expansion joint and 204-threaded hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail with reference to the accompanying drawings and examples.

Examples

As shown in fig. 1-3, the utility model discloses a two sets of expansion bolt subassemblies, including screw 1 and expansion sleeve 2, screw 1 is the integral type structure of compriseing screwhead 101, circular cone section 102 and screw thread section 103, expansion sleeve 2 is the integral type structure of compriseing inner cone 201 and pipe 202, and the tapering of the hole tapering of inner cone 201 is unanimous with circular cone section 102's tapering, has seted up a set of expansion joint 203 on the lateral wall of inner cone 201, is provided with at the oral area of pipe 202 with screw thread section 103 complex screw hole 204. The minimum diameter of the conical section 102 is larger than the diameter of the threaded section 103, so that the threaded section 103 and the inner conical tube 201 are prevented from interfering with each other. The length of the expansion joint 203 is greater than or equal to that of the inner conical pipe 201, and the length of the conical section 102 is greater than that of the expansion joint 203, so that the conical section 102 can smoothly support the inner conical pipe 201 in the using process. The screw head 101 is a hexagonal head, a flange plate is arranged between the screw head 101 and the conical section 102, and the mounting hole is sealed and plugged by the flange plate, so that air or rainwater is prevented from entering the mounting hole to corrode the rod part of the screw 1 and the expansion sleeve 2.

The utility model discloses a theory of operation:

during installation, firstly, the rod part of the screw 1 extends into the expansion sleeve 2, then the screw 1 is rotated to enable the thread section 103 on the rod part of the screw 1 to be in threaded connection with the thread hole 204 on the expansion sleeve 2, then the screw 1 and the expansion sleeve 2 are implanted into the installation hole together, the expansion sleeve 2 is restrained by the inner wall of the installation hole and keeps fixed, at the moment, the screw 1 is continuously rotated to enable the conical section 102 on the rod part of the screw 1 to gradually enter the inner conical tube 201 of the expansion sleeve 2, so that the inner conical tube 201 expands and opens in the installation hole, and the expansion bolt is firmly fixed in the installation hole. Because the opening mouth of inflation cover 2 is installed towards the mounting hole outward, after the opening mouth of inflation cover 2 was strutted the inflation, the opening mouth formed "barb" shape in the mounting hole, effectively avoided inflation cover 2 to deviate from the mounting hole, improved fixed reliability. During disassembly, only the screw 1 needs to be loosened, the conical section 102 on the rod part of the screw 1 is separated from the expansion sleeve 2, and the expansion sleeve 2 retracts to the original shape, so that the whole expansion bolt can be smoothly taken out from the mounting hole, the reuse is facilitated, the pollution is avoided, and the resources are saved.

In addition, because the expansion sleeve 2 and the screw 1 are all arranged in the mounting hole, only the screw head 101 is exposed, the rod parts of the expansion sleeve 2 and the screw 1 are prevented from contacting with the outside air or rainwater, the corrosion of the rod parts is prevented, and the later-stage disassembly is convenient. Furthermore, the utility model discloses only constitute by two parts of screw 1 and inflation cover 2, simple structure, processing cost is low.

Claims

1. The utility model provides a two-piece expansion bolt subassembly, includes screw (1) and expansion shell (2), its characterized in that: the screw (1) is an integrated structure consisting of a screw head (101), a conical section (102) and a threaded section (103), the expansion sleeve (2) is an integrated structure consisting of an inner conical tube (201) and a circular tube (202), the inner hole taper of the inner conical tube (201) is consistent with that of the conical section (102), a group of expansion joints (203) are formed in the side wall of the inner conical tube (201), and a threaded hole (204) matched with the threaded section (103) is formed in the opening of the circular tube (202).

2. The two-piece expansion bolt assembly of claim 1, wherein: the smallest diameter of the conical section (102) is larger than the diameter of the threaded section (103).

3. The two-piece expansion bolt assembly of claim 1, wherein: the length of the expansion joint (203) is greater than or equal to that of the inner conical pipe (201), and the length of the conical section (102) is greater than that of the expansion joint (203).

4. The two-piece expansion bolt assembly of claim 1, wherein: the screw head (101) is a hexagonal head or a hook, and a flange plate is arranged between the screw head (101) and the conical section (102).