CN220726789U

CN220726789U - Back bolt

Info

Publication number: CN220726789U
Application number: CN202321833898.1U
Authority: CN
Inventors: 邰志强; 吴永亮; 庞婷玲; 刘瑞辉; 高润泽
Original assignee: Xingsanxing Cloud Technology Co ltd
Current assignee: Xingsanxing Cloud Technology Co ltd
Priority date: 2023-07-12
Filing date: 2023-07-12
Publication date: 2024-04-05
Anticipated expiration: 2033-07-12

Abstract

The utility model belongs to the technical field of back bolts, and particularly relates to a back bolt. The utility model comprises a hexagon head screw and an expansion piece, wherein the hexagon head screw is provided with a threaded rod part, the threaded rod part is sequentially and tightly attached with an expansion piece, a sleeve, a flat gasket, a spring gasket and a hexagon nut, the expansion piece is provided with a notch and a single piece part, the expansion piece corresponds to the hexagon head screw head and corresponds to the hexagon inclined plane, and the back bolt is composed of the hexagon head screw, the expansion piece, the sleeve, the spring gasket, the flat gasket and the hexagon nut.

Description

Back bolt

Technical Field

The utility model belongs to the technical field of building door and window curtain wall hardware, and relates to a back bolt.

Background

The back bolt is a product for fixing stone on the surface of a wall body by adopting a back cutting technology, is produced by adopting a high-quality stainless steel material, and is used in a stone curtain wall connecting system, and the back bolt is matched with anchor bolts with different plate thicknesses and specifications. The back bolt anchoring system can effectively fix marble, granite, micro-crystalline stone, ceramic plates, crystal glass, various artificial fiber boards and the like, and the concealed internal wedge-shaped cutter consists of a stainless steel anchor bolt, an aluminum alloy connecting piece and a keel to form a complete special system, so that the maximum bearing can be provided, and the boards are ensured not to generate internal stress due to the extrusion force of the anchor bolt.

The back bolt has good shock resistance, safety, convenient construction and effective construction efficiency improvement, and is the most economical, effective, beautiful and safe high-tech product.

The existing back bolt is usually a round-head screw rod, after the fastening, a certain slipping phenomenon exists in the using process due to the round surface, a fitting above the screw rod cannot form a locking key effect with the round-head screw rod, the anchoring effect is poor, the screw rod can rotate after the installation, and the like, and the installation is inconvenient, so that the back bolt is provided for the problems.

Disclosure of Invention

The utility model aims to solve the problems and provide a back bolt.

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

the utility model provides a back of body bolt, includes hexagon head screw rod and expansion piece, hexagon head screw rod one end is equipped with the threaded rod portion, the threaded rod portion is equipped with expansion piece, sleeve, flat gasket, spring gasket, hex nut to the overcoat in proper order, and expansion piece, sleeve, flat gasket, spring gasket, hex nut closely laminate, threaded rod portion top surpasss hex nut, the opening has been seted up to the expansion piece lower extreme, and the equal partition of opening portion, the expansion piece lower extreme is equally equipped with monolithic portion, and monolithic portion corresponds hexagonal portion.

In the back bolt, the threaded rod portion is fixedly connected above the hexagonal head screw rod, the external threads are arranged on the threaded rod portion, meanwhile, a distance is reserved between the external threads and the hexagonal head screw rod portion, the hexagonal head screw rod portion is equally divided into six hexagonal portions, and inclined planes are arranged on the hexagonal portions.

In the back bolt, the expansion piece is sleeved at the lower end of the threaded rod, a T-shaped through hole is formed in the expansion piece, and the inner wall above the T-shaped through hole is tightly attached to the external thread of the threaded rod.

In the back bolt, the lower end of the expansion piece is provided with the notch and the single piece part, the notch and the single piece part are alternately inserted, and a distance is reserved between the notch and the top of the expansion piece.

In the back bolt, a distance is reserved between the lower part of the inner part of the T-shaped through hole and the bottom of the threaded rod part, the single piece part is arranged on the head part of the hexagonal head screw rod, and the single piece part corresponds to the hexagonal part.

In the back bolt, the sleeve is sleeved outside the threaded rod portion above the expansion piece, the first through hole is formed in the sleeve, the inner wall of the first through hole is tightly attached to the outer wall of the threaded rod portion, the diameter of the sleeve is larger than the diameter of the bottom of the expansion piece, and the bottom of the sleeve is tightly attached to the top of the expansion piece.

In the back bolt, the flat gasket is sleeved outside the threaded rod portion above the sleeve, the second through hole is formed in the flat gasket, the inner wall of the second through hole is tightly attached to the outer wall of the threaded rod portion, the diameter of the flat gasket is larger than that of the sleeve, and the bottom of the flat gasket is tightly attached to the top of the sleeve.

In the back bolt, the spring gasket is sleeved outside the threaded rod portion above the flat gasket, the fracture through hole is formed in the spring gasket, a distance is reserved between the inner wall of the fracture through hole and the outer wall of the threaded rod portion, and the bottom of the spring gasket is tightly attached to the top of the flat gasket.

In the back bolt, the threaded rod portion above the spring gasket is sleeved with the threaded connection hexagonal nut, the hexagonal nut is internally provided with the internal threaded hole, and the bottom of the hexagonal nut is tightly attached to the top of the spring gasket.

In the back bolt, the top of the threaded rod part penetrates out of the upper part of the hexagonal nut.

Compared with the prior art, the utility model has the advantages that:

according to the utility model, the threaded rod part is arranged on the hexagonal head screw, the threaded rod part is sequentially and tightly attached with the expansion piece, the sleeve, the flat gasket, the spring gasket and the hexagonal nut, the opening part and the single-piece part are arranged on the expansion piece, the expansion piece corresponds to the head part of the hexagonal head screw, and the single-piece part corresponds to the inclined plane of the hexagonal part.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.

Drawings

FIG. 1 is an overall schematic of the present utility model;

FIG. 2 is a schematic overall elevational view of the present utility model;

FIG. 3 is an overall exploded schematic of the present utility model;

FIG. 4 is a schematic view of the overall bottom view of the present utility model;

in the figure: 1. a hexagonal head screw; 11. a threaded rod portion; 12. a hexagonal part; 2. an expansion sheet; 21. t-shaped through holes; 22. a notch; 23. a single-piece part; 3. a sleeve; 31. a first through hole; 4. a flat gasket; 41. a second through hole; 5. a spring washer; 51. a fracture through hole; 6. a hexagonal nut; 61. an internal threaded hole.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1-4, a back bolt comprises a hexagon head screw 1 and an expansion sheet 2, wherein one end of the hexagon head screw 1 is provided with a threaded rod portion 11, the threaded rod portion 11 is sequentially sleeved with the expansion sheet 2, a sleeve 3, a flat gasket 4, a spring gasket 5 and a hexagon nut 6, the expansion sheet 2, the sleeve 3, the flat gasket 4, the spring gasket 5 and the hexagon nut 6 are tightly attached, the top end of the threaded rod portion 11 exceeds the hexagon nut 6, the lower end of the expansion sheet 2 is provided with a notch 22, the notch 22 is equally divided, the lower end of the expansion sheet 2 is equally provided with a single-piece portion 23, and the single-piece portion 23 corresponds to the hexagon 12.

The threaded rod portion 11 is fixedly connected above the hexagonal head screw 1, external threads are arranged on the threaded rod portion 11, meanwhile, a distance is reserved between the external threads and the head portion of the hexagonal head screw 1, the head portion of the hexagonal head screw 1 is equally divided into six hexagonal portions 12, and inclined surfaces are arranged on the hexagonal portions 12.

The threaded rod 11 is arranged above the hexagonal screw 1, the upper parts of the hexagonal screw 1 are sequentially placed on the threaded rod 11, the upper parts of the hexagonal screw 1 are fixed with the hexagonal screw 1, the hexagonal 12 is arranged on the inner side of the head of the hexagonal screw 1 so as to equally separate the head of the hexagonal screw 1, and the parts arranged above the hexagonal 12 are correspondingly pressed down to form fixation.

Further, the lower end of the threaded rod part 11 is sleeved with an expansion sheet 2, a T-shaped through hole 21 is arranged in the expansion sheet 2, and the inner wall above the T-shaped through hole 21 is tightly attached to the external thread of the threaded rod part 11.

The expansion sheet 2 is sleeved outside the threaded rod portion 11, the inner upper side of the T-shaped through hole 21 arranged in the expansion sheet 2 is attached to the outer side of the threaded rod portion 11, the T-shaped through hole 21 can slide downwards along the outer wall of the threaded rod portion 11 after the expansion sheet 2 is pressed down, and therefore the inner wall of the T-shaped through hole 21 is attached to the inner side wall of the threaded rod portion 11 and the upper side of the head of the hexagon head screw 1.

Further, the lower end of the expansion sheet 2 is provided with a notch 22 and a single sheet portion 23, the notch 22 and the single sheet portion 23 are alternately inserted, and a distance is reserved between the notch 22 and the top of the expansion sheet 2.

The expansion piece 2 is provided with a notch 22 and a single piece 23, so that the single piece 23 can be opened to be tightly attached to the head of the hexagon head screw 1 after the expansion piece 2 is pressed down.

Further, a distance is provided between the lower portion of the inside of the T-shaped through hole 21 and the bottom of the threaded rod portion 11, the single piece portion 23 is placed on the head of the hexagonal head screw 1, and the single piece portion 23 corresponds to the hexagonal portion 12.

The hexagonal part 12 is arranged on the head part of the hexagonal head screw 1 and corresponds to the single-piece part 23, and when the expansion piece 2 is pressed down, the inner wall of the single-piece part 23 is attached to the hexagonal part 12 to form a whole.

The sleeve 3 is sleeved outside the threaded rod portion 11 above the expansion sheet 2, a first through hole 31 is formed in the sleeve 3, the inner wall of the first through hole 31 is tightly attached to the outer wall of the threaded rod portion 11, the diameter of the sleeve 3 is larger than the diameter of the bottom of the expansion sheet 2, and the bottom of the sleeve 3 is tightly attached to the top of the expansion sheet 2.

Above the expansion plate 2, a sleeve 3 is arranged, the sleeve 3 being pressed downwards onto the expansion plate 2 by the upper part, while the sleeve 3 forms a stable engagement between them.

Further, the flat gasket 4 is sleeved outside the threaded rod portion 11 above the sleeve 3, a second through hole 41 is formed in the flat gasket 4, the inner wall of the second through hole 41 is tightly attached to the outer wall of the threaded rod portion 11, the diameter of the flat gasket 4 is larger than that of the sleeve 3, and the bottom of the flat gasket 4 is tightly attached to the top of the sleeve 3.

Further, a spring gasket 5 is sleeved outside the threaded rod part 11 above the horizontal gasket 4, a fracture through hole 51 is formed in the spring gasket 5, a distance is reserved between the inner wall of the fracture through hole 51 and the outer wall of the threaded rod part 11, and the bottom of the spring gasket 5 is tightly attached to the top of the horizontal gasket 4.

The flat gasket 4 and the spring gasket 5 are arranged above the sleeve 3, and friction force is increased to the sleeve 3 and the spring gasket 5 by using the flat gasket 4, so that the sleeve 3 and the expansion sheet 2 on the threaded rod part 11 are more stable.

Further, the threaded rod portion 11 above the spring washer 5 is sleeved with a threaded connection hexagonal nut 6, an internal threaded hole 61 is formed in the hexagonal nut 6, and the bottom of the hexagonal nut 6 is tightly attached to the top of the spring washer 5.

A hexagonal nut 6 is provided above the spring washer 5, and when the hexagonal nut 6 is screwed onto the threaded shaft portion 11, the spring washer 5 prevents the hexagonal nut 6 from vibrating and sliding off.

Through the top of the threaded shank 11 and out over the hex nut 6.

Working principle:

be equipped with threaded rod portion 11 on hexagon head screw 1, and threaded rod portion 11 upwards just closely laminate in proper order and be equipped with expansion piece 2, sleeve 3, flat gasket 4, spring gasket 5 and hexagon nut 6, be equipped with internal thread hole 61 in hexagon nut 6, and when internal thread hole 61 and threaded rod portion 11 screw in, hexagon nut 6 just moves down, like this, laminate the hexagonal portion 12 that spring gasket 5, flat gasket 4, sleeve 3 and expansion piece 2 were equipped with in hexagon head screw 1 head department for expansion piece 2 laminate, and be equipped with monolithic portion 23 on the expansion piece 2, monolithic portion 23 one-to-one hexagonal portion 12 inclined plane simultaneously, during hexagon head screw 1 anchor like this, expansion piece 2 separately becomes six monolithic portions 23 and hugs closely on the hexagonal portion 12 inclined plane, form the key effect.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model.

Although 1, a hex head screw is used more herein; 11. a threaded rod portion; 12. a hexagonal part; 2. an expansion sheet; 21. t-shaped through holes; 22. a notch; 23. a single-piece part; 3. a sleeve; 31. a first through hole; 4. a flat gasket; 41. a second through hole; 5. a spring washer; 51. a fracture through hole; 6. a hexagonal nut; 61. internally threaded holes, etc., but does not exclude the possibility of using other terms. These terms are only used to more conveniently describe and explain the nature of the utility model and should be construed in a manner consistent with their spirit and scope.

Claims

1. The utility model provides a back bolt, includes hexagon head screw rod (1) and expansion piece (2), its characterized in that: hexagonal head screw rod (1) one end is equipped with threaded rod portion (11), threaded rod portion (11) upwards the overcoat in proper order is equipped with expansion piece (2), sleeve (3), flat gasket (4), spring gasket (5), hex nut (6), and expansion piece (2), sleeve (3), flat gasket (4), spring gasket (5), hex nut (6) closely laminate, threaded rod portion (11) top exceeds hex nut (6), opening (22) have been seted up to expansion piece (2) lower extreme, and opening (22) are equallyd divide, expansion piece (2) lower extreme equallyd divide is equipped with monolithic portion (23), and monolithic portion (23) correspond hexagonal portion (12).

2. A back bolt according to claim 1, wherein: the hexagonal screw rod (1) top fixed connection threaded rod portion (11), and be equipped with the external screw thread on threaded rod portion (11), have the distance between external screw thread and the hexagonal screw rod (1) head simultaneously, all divide into six hexagonal portion (12) on hexagonal screw rod (1) head, and hexagonal portion (12) are equipped with the inclined plane.

3. A back bolt according to claim 2, characterized in that: the lower end of the threaded rod part (11) is sleeved with an expansion sheet (2), a T-shaped through hole (21) is formed in the expansion sheet (2), and the inner wall above the T-shaped through hole (21) is tightly attached to the external thread of the threaded rod part (11).

4. A back bolt according to claim 3, wherein: the lower end of the expansion sheet (2) is provided with a notch (22) and a single sheet part (23), the notch (22) and the single sheet part (23) are alternately inserted, and a distance is reserved between the notch (22) and the top of the expansion sheet (2).

5. A back bolt according to claim 4, wherein: a distance is reserved between the lower part of the inner part of the T-shaped through hole (21) and the bottom of the threaded rod part (11), the single piece part (23) is arranged on the head part of the hexagonal head screw rod (1), and the single piece part (23) corresponds to the hexagonal part (12).

6. A back bolt according to claim 5, wherein: the utility model discloses a high-pressure expansion device, including expansion piece (2), sleeve (3) are equipped with to expansion piece (2) top threaded rod portion (11) overcoat, and are equipped with first through-hole (31) in sleeve (3), first through-hole (31) inner wall and threaded rod portion (11) outer wall closely laminate, sleeve (3) diameter is greater than expansion piece (2) bottom diameter, and sleeve (3) bottom and expansion piece (2) top closely laminate.

7. A back bolt according to claim 6, wherein: the novel anti-theft device is characterized in that a flat gasket (4) is sleeved outside the threaded rod portion (11) above the sleeve (3), a second through hole (41) is formed in the flat gasket (4), the inner wall of the second through hole (41) is tightly attached to the outer wall of the threaded rod portion (11), the diameter of the flat gasket (4) is larger than that of the sleeve (3), and the bottom of the flat gasket (4) is tightly attached to the top of the sleeve (3).

8. A back bolt according to claim 7, wherein: the novel flat gasket is characterized in that a spring gasket (5) is sleeved outside the threaded rod portion (11) above the flat gasket (4), a fracture through hole (51) is formed in the spring gasket (5), a distance is reserved between the inner wall of the fracture through hole (51) and the outer wall of the threaded rod portion (11), and the bottom of the spring gasket (5) is tightly attached to the top of the flat gasket (4).

9. A back bolt according to claim 8, wherein: threaded connection hexagonal nut (6) is sleeved outside threaded rod portion (11) above spring gasket (5), and internally threaded hole (61) has been seted up in hexagonal nut (6), hexagonal nut (6) bottom and spring gasket (5) top closely laminate.

10. A back bolt according to claim 9, wherein: the top of the threaded rod part (11) penetrates out of the upper part of the hexagonal nut (6).