CN211778402U

CN211778402U - Reinforced expansion screw

Info

Publication number: CN211778402U
Application number: CN201922502349.6U
Authority: CN
Inventors: 王保玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-27
Anticipated expiration: 2029-12-31

Abstract

The utility model belongs to the technical field of the fixed screw, a reinforcement type inflation screw is disclosed, including nut, screw pole and the solid section of thick bamboo of inflation, the screw pole is including exposing portion and embedding portion, be provided with the external screw thread on the lateral wall of exposing portion, the nut inside wall be provided with external screw thread assorted internal thread, the nut passes through the internal thread with the external screw thread cover is established in exposing portion, the outside of embedding portion is served and is provided with the fixed head, the solid cover of inflation sets up in the embedding portion, the solid section of thick bamboo of inflation is close to evenly be provided with the inflation groove of prism on the lateral wall of the one end of fixed head, and is adjacent all be provided with the inflation wall between the inflation groove, correspond in the embedding portion the inflation wall is provided with the toper arch.

Description

Reinforced expansion screw

Technical Field

The utility model belongs to the technical field of the fixed screw, particularly, relate to a reinforcement type inflation screw.

Background

The expansion screw is generally a metal expansion screw, the fixed type of the expansion screw utilizes wedge-shaped inclination to promote expansion to generate friction gripping force to achieve the fixing effect, one end of the screw is a thread, a layer of iron sheet is wrapped outside the screw, a plurality of notches are formed in an iron sheet round tube of an iron sheet tube, the iron sheet round tube and the notches are plugged into large-size power on a wall together, then a screw cap is locked, the screw cap pulls the screw outwards to pull the taper into the iron sheet round tube, the iron sheet round tube is expanded and then is tightly fixed on the wall, the expansion screw is generally used for fastening a protective guard, a rain shed, an air conditioner and the like on materials such as cement, rotating materials and the like, but the fixation is not very firm, and the expansion screw is likely to loosen and fall off if the. The expansion screw has the advantages of small drilling hole, large tension, flat exposed after use, and obvious advantage of keeping the wall surface flat if not used, and can be widely applied to various decoration occasions. Most of the existing expansion screw structures comprise a screw rod and a nut, an expansion sleeve arranged on the screw rod is only provided with a plurality of gaps at one end deep in an embedded wall body to form an expansion valve, the supporting force direction of the expansion valve is fixed, the expansion direction is uncertain, the supporting capacity is limited, the expansion degree is small, the binding force between the expansion valve and the wall is small, and the firmness is low.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art, the present invention provides a reinforced expansion screw.

The utility model discloses the technical scheme who adopts does, a reinforcement type inflation screw, including nut, lead screw and the solid section of thick bamboo of inflation, the lead screw is including exposing portion and embedding portion, be provided with the external screw thread on the lateral wall of exposing portion, the nut inside wall be provided with external screw thread assorted internal thread, the nut passes through the internal thread with the external screw thread cover is established in exposing portion, the outside of embedding portion is served and is provided with the fixed head, the solid cover of inflation sets up in the embedding portion, the solid section of thick bamboo of inflation is close to evenly be provided with the inflation groove of prism on the lateral wall of the one end of fixed head, and is adjacent all be provided with the inflation wall between the inflation groove, correspond in the embedding portion the inflation wall is provided with first toper arch.

In the technical scheme, the expansion screw comprises a nut, a screw rod and an expansion fixing cylinder sleeved on the screw rod, wherein the inner side wall of the nut is provided with an external thread matched with the external thread arranged on the exposed part of the screw rod, so that the nut can conveniently rotate along the matching of the internal thread and the external thread; the embedded part is sleeved with an expansion fixing cylinder, namely the outer side wall of the embedded part is in contact with the inner side wall of the expansion fixing cylinder, so that the expansion fixing cylinder can move along the embedded part conveniently; evenly be provided with the inflation groove of a plurality of prisms on the solid section of thick bamboo of inflation, and adjacent inflation groove all is provided with the inflation wall between two liang, and when the solid section of thick bamboo atress of inflation, the inflation wall can be buckled and expand along the bellied shape of first toper for the inflation wall can directional expansion, and is higher with the cohesion and the holding power of wall, and the fastness is higher.

In any one of the above technical solutions, preferably, a second tapered protrusion corresponding to the first tapered protrusion is provided on an inner surface of the expansion wall.

In the technical scheme, the second conical protrusion can be in contact with the first conical protrusion, so that the expansion wall can be rapidly and directionally expanded along the side surface of the first conical protrusion, and the stability is high.

In any one of the above technical solutions, preferably, the fixing head is provided with a plurality of anti-slip protrusions, and the expansion fixing cylinder is provided with anti-slip grooves engaged with the anti-slip protrusions.

In this technical scheme, the antiskid groove block of the fretwork on a plurality of non-slip raised and the solid section of thick bamboo of inflation that sets up on the fixed head can effectively fix the solid section of thick bamboo of inflation, avoids the solid section of thick bamboo of inflation to rotate and causes the not hard up condition.

In any of the above technical solutions, preferably, an anti-back ring is sleeved between the nut and the expansion fixing cylinder.

In this technical scheme, the setting can effectively prevent that the nut from loosening at the nut with the solid circle of preventing that the inflation is fixed between the section of thick bamboo.

In any of the above solutions, preferably, the diameter of the fixing head is greater than or equal to the diameter of the expansion cylinder.

In this technical scheme, the diameter of fixed head is greater than or is fixed in the solid diameter of a section of thick bamboo of inflation, can effectively avoid the solid section of thick bamboo of inflation to receive unexpected damage when the installation inflation screw.

In any one of the above technical solutions, preferably, four expansion grooves are uniformly formed in the expansion fixing cylinder.

In any of the above technical solutions, preferably, the expansion wall is provided with a pliable portion.

In the technical scheme, the flexible part arranged on the expansion wall can guide the direction of the expansion wall in bending and expanding, and the installation is convenient.

In any of the above technical solutions, preferably, the fixing head adopts a flat plate structure or a pointed structure.

In any one of the above technical solutions, preferably, the nut is of an octagonal nut structure.

In this technical scheme, the nut of octagonal nut structure is convenient for the application of force rotatory, the installation of being convenient for.

Compared with the prior art, the utility model has the advantages of: simple structure, with the inflation screw embedding back, rotatory nut for the solid section of thick bamboo pressurized of inflation, the inflation wall is expanded and is buckled, and is higher with the cohesion of wall body, and the fixity can be higher, the installation of being convenient for, and maneuverability is strong.

Drawings

Fig. 1 shows a schematic view of a reinforced expansion screw according to an embodiment of the present invention in a disassembled configuration;

fig. 2 shows a schematic structural view of a reinforced expansion screw according to an embodiment of the present invention;

fig. 3 shows a schematic structural view of a reinforced expansion screw according to another embodiment of the present invention.

The names corresponding to the reference numerals in the drawings are a nut 101, a screw rod 102, an expansion fixing cylinder 103, an exposed part 104, an embedded part 105, external threads 106, a fixing head 107, an expansion groove 108, an expansion wall 109, a first conical protrusion 110, a second conical protrusion 111, an anti-withdrawal ring 112, an anti-slip protrusion 113, an anti-slip groove 114 and an easily bendable part 115.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

In the present invention, the use of directional terms such as "upper and lower" in the case where no description is made to the contrary generally means upper and lower in the normal use condition of the present disclosure. The inner and outer parts refer to the inner and outer parts of the corresponding part contour. In addition, it should be noted that terms such as "first", "second", and the like are used for distinguishing one element from another, and have no order or importance. In the drawings, the same reference numerals denote the same elements.

The present invention will be further described with reference to fig. 1 to 3.

As shown in fig. 1 to 3, a reinforced expansion screw comprises a screw cap 101, a screw rod 102 and an expansion fixing barrel 103, wherein the screw rod 102 comprises an exposed part 104 and an embedded part 105, an external thread 106 is arranged on the outer side wall of the exposed part 104, an internal thread (not shown in the figure) matched with the external thread 106 is arranged on the inner side wall of the screw cap 101, the screw cap 101 is sleeved on the exposed part 104 through the internal thread and the external thread 106, a fixing head 107 is arranged on the outer side end of the embedded part 105, the expansion fixing barrel 103 is sleeved on the embedded part 105, prismatic expansion grooves 108 are uniformly arranged on the side wall of one end of the expansion fixing barrel 103 close to the fixing head 107, an expansion wall 109 is arranged between every two adjacent expansion grooves 108, and a first conical protrusion 110 is arranged on the expansion wall 109 corresponding to the embedded part, a second tapered protrusion 111 corresponding to the first tapered protrusion 110 is provided on the inner surface of the expansion wall 109.

The expansion screw comprises a nut 101, a lead screw 102 and an expansion solid cylinder 103 sleeved on the lead screw 102, the expansion solid cylinder 103 is an octagonal cylinder body with four planar surfaces arranged on the side surface, and the inner side wall of the nut is provided with an external thread 106 matched with the external thread 106 arranged on the exposed part 104 of the lead screw 102, so that the nut 101 can conveniently rotate along the matching of the internal thread and the external thread 106; the embedded part 105 is sleeved with the expansion fixing cylinder 103, namely the outer side wall of the embedded part 105 is in contact with the inner side wall of the expansion fixing cylinder 130, so that the expansion fixing cylinder 103 can move along the embedded part 105 conveniently; a plurality of prismatic expansion grooves 108 are uniformly arranged on the expansion solid cylinder 103, and expansion walls 109 are arranged between every two adjacent expansion grooves 108, when the expansion solid cylinder 103 is stressed, the expansion walls 109 can be bent and expanded along the shape of the first conical protrusions 110, so that the expansion walls 109 can be expanded directionally, the bonding force and the supporting force with the wall are high, and the firmness is high; the expansion fixing cylinder 103 can be made of iron sheet, so that resources are saved; the second conical projection 111 can contact the first conical projection 110, facilitating rapid directional opening of the expansion wall 109 along the side of the first conical projection 110 with high stability.

Further, an anti-back ring 112 is sleeved between the screw cap and the expansion fixing cylinder 103.

Wherein, the anti-back ring 112 arranged between the nut and the expansion fixing cylinder 103 can effectively prevent the nut from loosening.

Furthermore, the fixing head 107 is provided with a plurality of anti-slip protrusions 113, and the expansion fixing cylinder 103 is provided with anti-slip grooves 114 engaged with the anti-slip protrusions.

A plurality of anti-slip protrusions 113 arranged on the fixing head 107 are clamped with anti-slip grooves 114 on the expansion fixing cylinder 103, so that the expansion fixing cylinder 103 can be effectively fixed, and the phenomenon that the expansion fixing cylinder 103 rotates to cause looseness is avoided.

Further, the diameter of the fixation head 107 is greater than or equal to the diameter of the expandable fixation cylinder 103.

The diameter of the fixing head 107 is larger than or fixed on the diameter of the expansion fixing cylinder 103, so that the expansion fixing cylinder 103 can be effectively prevented from being accidentally damaged when the expansion screw is installed.

Furthermore, four expansion grooves 108 are uniformly arranged on the expansion cylinder 103, and a flexible part 115 is arranged on the expansion wall 109.

The flexible portion 115 disposed on the expansion wall 109 can guide the direction of the expansion wall 109 to bend and expand, which is convenient for installation.

Further, the fixing head 107 is of a flat plate structure or a pointed structure, and the screw cap is of an octagonal screw cap structure.

Wherein, the nut of octagon nut structure is convenient for the application of force rotatory, the installation of being convenient for.

In the first embodiment, an expansion fixing sleeve, an anti-receding ring 112 and a nut 101 are sequentially sleeved on a screw rod 102, and the expansion fixing sleeve is fixed by an anti-slip bulge 113, so that the assembly of the expansion screw is completed; drilling a mounting hole in a wall body or a hollow device, inserting an embedding part 105 of an expansion screw into the mounting hole, then rotating a screw cap, screwing the screw cap to the wall body, pressing an expansion fixing sleeve tightly, and bending and expanding an expansion wall 109 on the expansion fixing sleeve along a first conical bulge 110 to achieve the purpose of fastening; wherein, be provided with the cavity in the hollow brick, after reinforcement type inflation screw embedding hollow dress is inside, the inflation degree of inflation wall 109 is greater than reinforcement type inflation screw embedding solid wall body or brick body inside, and the inflation degree is the biggest with fixed effect.

Above combine the figure to describe in detail the technical scheme of the utility model, the utility model discloses a technical scheme provides a new reinforcement type expansion screw, and the modern design, simple structure, low cost with the expansion screw embedding back, rotatory nut for the solid section of thick bamboo pressurized of inflation, the expansion wall rises to buckle, and is higher with the cohesion of wall body, and the fixed ability is higher, the installation of being convenient for, maneuverability is strong, has solved general screw and has only been applicable to the entity wall and be not suitable for the drawback of hollow wall, has improved work efficiency greatly, has very strong practical value.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.

In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.

Claims

1. The utility model provides a reinforcement type inflation screw, its characterized in that, includes nut, lead screw and the solid section of thick bamboo of inflation, the lead screw is including exposing portion and embedding portion, be provided with the external screw thread on the lateral wall of exposing portion, the nut inside wall be provided with external screw thread assorted internal thread, the nut passes through the internal thread with the external screw thread cover is established expose in the portion, the outside of embedding portion is served and is provided with the fixed head, the solid cover of inflation is set up in the embedding portion, the solid section of thick bamboo of inflation is close to evenly be provided with the inflation groove of a plurality of prisms on the lateral wall of the one end of fixed head, and is adjacent all be provided with the inflation wall between the inflation groove, correspond in the embedding portion the inflation wall is provided with first toper arch.

2. The reinforced expansion screw of claim 1, wherein a second tapered protrusion corresponding to the first tapered protrusion is provided on an inner surface of the expansion wall.

3. The reinforced expansion screw of claim 1, wherein an anti-back ring is sleeved between the nut and the expansion cylinder.

4. The reinforced expansion screw of claim 1, wherein the fixation head has a diameter greater than or equal to a diameter of the expansion sleeve.

5. The reinforced expansion screw of claim 1, wherein four expansion grooves are uniformly formed on the expansion cylinder.

6. The reinforced expansion screw as claimed in claim 1, wherein the fixing head is provided with a plurality of anti-slip protrusions, and the expansion fixing barrel is provided with anti-slip grooves engaged with the anti-slip protrusions.

7. The reinforced expansion screw of claim 1, wherein the fixing head is of a plate structure or a pointed structure.

8. The reinforced expansion screw of claim 1, wherein the nut is an octagonal nut structure.