CN212003865U

CN212003865U - Window type expansion screw

Info

Publication number: CN212003865U
Application number: CN202020315451.5U
Authority: CN
Inventors: 蔡民平
Original assignee: Fujian Jinjiang Self Tapping Screw Co ltd
Current assignee: Fujian Jinjiang Self Tapping Screw Co ltd
Priority date: 2020-03-14
Filing date: 2020-03-14
Publication date: 2020-11-24
Anticipated expiration: 2030-03-14

Abstract

The utility model discloses a window type expansion screw, which is characterized by comprising a screw rod, an expansion ring and an expansion pipe, wherein the expansion ring is provided with a bulge, the expansion pipe is provided with a matched chute, the screw rod penetrates through the expansion pipe, and the tail part of the screw rod is in threaded connection with the expansion ring; when the expansion pipe is used, the screw rod is continuously rotated, the expansion ring can move to the top of the screw rod along the sliding groove based on the thread relation between the expansion ring and the screw rod, the side wall at the rear part of the expansion pipe is expanded by utilizing the expansion ring with the outer diameter larger than the inner diameter of the expansion pipe, and the transverse teeth of the outer side wall are pricked into an object; the utility model discloses utilize the screw thread to rotate the effect, reach the fixed purpose of inflation, and the structure is succinct, and is strong to multiple environment suitability, and the effect is showing.

Description

Window type expansion screw

Technical Field

The present invention relates to a fastener, and more particularly to an expansion screw.

Background

The expansion screw is widely applied as a mounting connecting part in daily construction, can be conveniently and quickly mounted, is firm, reliable, economical, applicable and popular, has wide application range and large using amount, is mainly used for decoration links in later period of construction, needs to punch a hole on a wall, inserts the expansion pipe and enables the tail end of the expansion pipe to be expanded and fixed on the inner wall of the wall hole.

The common expansion screw is divided into a screw part and an expansion part, the expansion part is made of various materials, the expansion part is fixed by firstly disassembling the screw when the expansion screw is used, then the screw penetrates through the expansion part to be fixed to a plurality of parts, but repeated operation is mostly complicated, therefore, the expansion screw for realizing the expansion fixing purpose of the expansion pipe and the screw connection by utilizing the expansion ring is designed, along with the progress of modern technology, the hollow brick is gradually widely used, the common expansion screw is not used, the expansion screw aiming at the hollow brick is required to be used, and therefore, the brick used by a target building is required to be determined before the expansion screw is used.

SUMMERY OF THE UTILITY MODEL

To the above, the utility model provides a following technical scheme: the window type expansion screw comprises a screw, an expansion ring and an expansion pipe and is characterized in that the screw is divided into a nut and a screw which are fixedly connected, the expansion pipe is sleeved outside the screw, one end of the screw is connected with the nut, the other end of the screw is in threaded connection with the expansion ring in a frustum shape, the maximum outer diameter of the expansion ring is larger than the diameter of an inner hole of the expansion pipe, a convex block is further arranged on the surface of the expansion ring, and the expansion pipe is provided with a first N-shaped sliding groove and a second groove which correspond to the convex block.

As a further arrangement of the scheme, the outer side wall of the expansion pipe is provided with transverse teeth and hollow thread grooves.

As a further arrangement of the scheme, the screw rod is divided into an upper screw rod without threads and a lower screw rod with threads, and the maximum outer diameter of the lower screw rod is smaller than that of the upper screw rod.

As a further arrangement of the scheme, one end face of the expansion pipe is provided with an expansion pipe sleeve head, and one face, facing the surface of the object, of the expansion pipe sleeve head is provided with the spike teeth.

Compared with the prior art, the utility model, following outstanding advantage has:

1. by utilizing the matching of the hollow windows on the expansion pipes, the sliding grooves and the expansion rings, the target building can work well no matter the target building is a solid wall or a hollow wall;

2. the expansion pipe and the screw are integrally formed without secondary disassembly and then combined, the expansion screw can be directly fixed by drilling a corresponding wall hole in advance on the wall, and the expansion part is not required to be separately fixed after disassembly and then screwed;

3. the effect is showing, and anomalous expansion pipe lateral wall has strengthened frictional force, and spout and arch can prevent that the expansion ring from skidding along with the screw rotation, and the spike tooth on the expansion pipe hem prevents that the expansion pipe from beating in the wall hole and slidely.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a solid wall according to an embodiment of the present invention;

FIG. 3 is a schematic view of the fixing of the solid wall of the present invention;

FIG. 4 is a schematic view of an embodiment of the hollow wall of the present invention;

fig. 5 is a schematic view of the hollow wall fixing of the present invention.

Reference numerals: 1. a screw; 11. a nut; 12. a screw; 121. an upper screw rod; 122. a lower screw rod; 15. Nailing teeth; 2. an expansion ring; 21. a bump; 3. an expansion tube; 31. a first sliding chute; 33. transverse teeth; 34. a hollow groove is formed; 36. sleeving an expansion pipe; 38. grooving II; 8. a solid wall; 9. provided is a hollow wall.

Detailed Description

The following detailed description describes embodiments of the invention, examples of which are intended to explain the invention, and the terms "upper", "lower", "top", "bottom", and the like in the embodiments indicate positional or orientational relationships and are merely for convenience in describing the invention and to simplify the description, and do not indicate or imply that the components or elements so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.

As shown in fig. 1-5, the utility model provides a window formula expansion screw, including screw 1, expansion ring 2 and expansion pipe 3, its characterized in that, screw 1 divide into fixed connection's nut 11 and screw rod 12, outside screw rod 12 was located to 3 covers of expansion pipe, screw rod 12 one end connect nut 11, the expansion ring 2 of other end threaded connection frustum shape, just 2 external diameters of expansion ring are greater than 3 hole diameters of expansion pipe, 2 surfaces of expansion ring still are provided with lug 21, expansion pipe 3 is provided with "N" type spout 31 and fluting two 38 that correspond lug 21.

As a further arrangement of the scheme, the outer side wall of the expansion pipe 3 is provided with transverse teeth 33 and a hollow thread groove 34.

As a further arrangement of the present solution, the screw 12 is divided into an upper screw 121 without threads and a lower screw 122 with threads, and the maximum outer diameter of the lower screw 122 is smaller than that of the upper screw 121.

As a further arrangement of the present scheme, one end face of the expansion pipe 3 is provided with an expansion pipe sleeve head 36, and one face of the expansion pipe sleeve head 36 facing the object surface is provided with the spike teeth 15.

Example 1: as shown in fig. 3, when drilling, the target wall surface is determined to be a solid wall surface, the screw with the lug 21 positioned in the first N-shaped chute 31 is used, after the wall hole is drilled, the screw is directly fixed and placed in the wall hole, the screw is rotated in the forward direction, the expansion ring 2 gradually moves towards the nut 11 due to the limiting effect of the lug 21 and the first chute 31, meanwhile, the expansion ring 2 larger than the expansion pipe 3 is used for expanding the outer wall of the expansion pipe 3, the expansion pipe 3 is pressed into the target wall surface, and the fixation is realized by enhancing the friction force.

Example 2: as shown in fig. 5, when a hole is drilled, the target wall is determined to be a hollow wall, the expansion ring 2 can be unscrewed, the bump 21 is aligned with the second notch 38 and clamped, the screw 1 is rotated to realize assembly, the screw is rotated in the forward direction after being placed in the wall hole, the expansion ring 2 is abutted against the tail of the expansion pipe 3 due to the limiting effect of the bump 21 and the second notch 38, the expansion pipe 3 deforms from the middle weak part under the rotation of the screw 1 and the force of the expansion ring 2, and the expansion pipe sleeve head 36 is fixed under the pressure of the deformed expansion pipe 3.

The above description should not be taken as limiting the invention, but is made merely for the purpose of assisting in the explanation of the invention. The present invention is not intended to be limited to the specific embodiments shown and described, and any modifications, equivalent replacements, or improvements made within the design concept of the present invention are intended to be included within the scope of the present invention. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best understand and utilize the invention.

Claims

1. The utility model provides a window formula expansion screw, is including screw (1), expansion ring (2) and expansion pipe (3), its characterized in that, screw (1) divide into fixed connection's nut (11) and screw rod (12), outside screw rod (12) were located to expansion pipe (3) cover, screw rod (12) one end connect nut (11), expansion ring (2) of other end threaded connection frustum shape, just expansion ring (2) maximum external diameter is greater than expansion pipe (3) hole diameter, expansion ring (2) surface still is provided with lug (21), expansion pipe (3) are provided with "N" type spout one (31) and fluting two (38) that correspond lug (21).

2. A window type expansion screw according to claim 1, wherein the expansion tube (3) has a lateral tooth (33) and a hollow groove (34) on its outer side wall.

3. A window expansion screw according to claim 2, wherein the shank (12) is divided into an upper shank (121) without threads and a lower shank (122) with threads, and the lower shank (122) has a smaller maximum outer diameter than the upper shank (121).

4. A window-type expansion screw according to claim 3, wherein an end face of the expansion tube (3) is provided with an expansion tube sleeve head (36), and a face of the expansion tube sleeve head (36) facing the object surface is provided with spike teeth (15).