CN210343947U

CN210343947U - Fastening screw

Info

Publication number: CN210343947U
Application number: CN201920436720.0U
Authority: CN
Inventors: 张晓辉; 张华�
Original assignee: Anhui Sipade Information Technology Co ltd
Current assignee: Anhui Sipade Information Technology Co ltd
Priority date: 2019-04-02
Filing date: 2019-04-02
Publication date: 2020-04-17
Anticipated expiration: 2029-04-02

Abstract

The utility model relates to a fastening screw, which comprises a bolt, a nut and a fixed cylinder; the whole nut is in a hollow round table shape, and internal threads are arranged on the inner side wall of the nut; the fixed cylinder is in a hollow circular truncated cone shape, the outer diameter of the fixed cylinder is smaller than the inner diameter of the nut, the inner diameter of the fixed cylinder is larger than the diameter of the fixed rod-shaped object, and a plurality of hole grooves are uniformly distributed on the axial surface of the fixed cylinder; the cross section of the bolt is wedge-shaped, the top of the bolt is provided with external threads, and the nut and the bolt can be meshed with each other through the internal threads and the external threads; the bolt is divided into an upper part and a lower part from the middle part, wherein a plurality of grooves are arranged on the opposite surfaces of the upper part and the lower part, spiral springs are arranged in the grooves, and a friction layer is arranged at the bottom of the second bolt; the structure ensures that the head of the fixed tubular object does not need to be opened, thereby avoiding the reduction of strength caused by opening; the wedge bolt is provided with a coil spring, so that the generated pressure in the vertical direction increases the friction force between the threads, and the threads can be firmly engaged without loosening for a long time.

Description

Fastening screw

Technical Field

The utility model belongs to the fixing tool field especially relates to a fastener field.

Background

Traditional fastener includes the bolt, the nut etc. and bolted connection is the connected mode that gets commonly used in mechanical field, in the building trade now, the use of scaffold frame is very general, but generally all use grafting or screw fastening connection, if adopt screwed connection, generally still need car out the screw thread on the steel pipe, connect using the nut, but when car out the screw thread, also make the intensity of screw thread department be less than the intensity in other places far away, and can produce the deformation crack easily after the long live time, not hard up, circumstances such as smooth silk, also have inconveniently during the use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a reasonable in design, use convenient, the better fastening screw of performance just in order to solve above-mentioned problem.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

a fastening screw includes a nut; the nut is integrally a hollow cylinder or a table body, the inner diameter of the nut is a circular table body, internal threads are arranged on the inner side wall of the nut, the nut further comprises a fixed cylinder, the whole fixed cylinder is a circular table body consistent with the nut, the outer diameter of the fixed cylinder is smaller than the inner diameter of the nut, the inner diameter of the fixed cylinder is larger than the diameter of a fixed object, a plurality of hole grooves are uniformly distributed on the axial surface of the fixed cylinder, and the hole grooves penetrate through the surface of the fixed cylinder; a bolt is embedded in the hole groove, the upper part of the cross section of the bolt is triangular, the longitudinal section of the bolt is trapezoidal, the top of the bolt is provided with an external thread, and the nut and the bolt are mutually meshed through the internal thread and the external thread; the bolt is divided into a first bolt and a second bolt, the first bolt is embedded in the second bolt, an elastic part is arranged between the opposite surfaces of the first bolt and the second bolt, a friction layer is further arranged at the bottom of the second bolt, and the surfaces of the friction layer, which are contacted with the object to be fixed, are mutually inosculated.

As a further optimization scheme of the utility model, a plurality of grooves are arranged on the opposite surfaces of the first bolt and the second bolt, and the elastic component is arranged in the grooves; the elastic component comprises a spiral spring, a limiting rod and a limiting cylinder, the limiting rod and the limiting cylinder are respectively fixedly arranged in the grooves of the first bolt and the second bolt, in addition, the spiral spring is sleeved on the limiting cylinder, and the limiting cylinder is sleeved on the limiting rod.

As a further optimization scheme of the utility model, the elastic component further comprises a limit pin; the limiting pin is located on the inner side wall, close to the bottom, of the groove.

As a further optimization scheme of the utility model, elastomeric element includes shell fragment, a plurality of the top fixed connection of shell fragment is in the bottom surface of first bolt.

As a further optimization scheme of the present invention, the number of the holes and the slots is 6.

As a further optimization scheme of the utility model, the shape of hole groove is rectangle or trapezoidal.

As the utility model discloses a further optimization scheme, the nut surface is hexagonal arris type or round platform type, and is equipped with the skid resistant course on the surface.

The beneficial effects of the utility model reside in that:

1) the screw in the utility model is more convenient than the existing fastener;

2) the head of the fixed tubular object does not need to be opened, so that the reduction of strength caused by opening is avoided;

3) the wedge bolt is provided with a coil spring, so that the generated pressure in the vertical direction increases the friction force between the threads, and the threads can be firmly engaged without loosening for a long time.

Drawings

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

fig. 2 is a schematic left side view of the present invention;

fig. 3 is a schematic cross-sectional view of the bolt of the present invention;

fig. 4 is a schematic longitudinal sectional view of the bolt of the present invention;

fig. 5 is a partial enlarged view of the bolt of the present invention at a;

fig. 6 is a schematic structural view of the nut of the present invention;

fig. 7 is a schematic structural view of the fixing cylinder of the present invention;

fig. 8 is a schematic structural view of embodiment 2 of the present invention;

fig. 9 is a schematic left view of embodiment 2 of the present invention;

fig. 10 is a schematic cross-sectional view of a bolt according to embodiment 2 of the present invention;

in the figure: 1. a nut; 11. an internal thread; 12. an anti-slip layer; 2. a bolt; 21. an external thread; 22. a first bolt; 23. a second bolt; 231. a friction layer; 24. a groove; 25. an elastic member; 251. A coil spring; 252. a limiting rod; 253. a limiting cylinder; 254. a spacing pin; 255. a spring plate; 3. A fixed cylinder; 31. and (4) a hole groove.

Detailed Description

The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.

Example 1

A fastening screw as shown in fig. 1 to 7 includes a bolt 2, a nut 1; the whole nut 1 is in a hollow round table shape, and an internal thread 11 is arranged on the inner side wall of the nut; the outer surface of the anti-skid layer is also provided with an anti-skid layer 12; the nut is characterized by further comprising a fixed cylinder 3, wherein the fixed cylinder 3 is a hollow circular truncated cone, the outer diameter of the fixed cylinder 3 is smaller than the inner diameter of the nut 1, the inner diameter of the fixed cylinder is larger than the diameter of a fixed object, a plurality of hole grooves 31 are uniformly distributed on the axial surface of the fixed cylinder, and the hole grooves 31 penetrate through the surface of the fixed cylinder 3; the bolt 2 has the same projection shape with the hole grooves 31 and is respectively arranged in the plurality of hole grooves 31, the upper part of the cross section of the bolt 2 is triangular, the longitudinal section of the bolt is trapezoidal, the top of the bolt is provided with external threads 21, and the nut 1 and the bolt 2 can be mutually meshed through the internal threads and the external threads; the bolt 2 is divided into a first bolt 22 and a second bolt 23, the first bolt 22 is embedded in the second bolt 23, an elastic part 25 is arranged between the opposite surfaces of the first bolt 22 and the second bolt 23, a plurality of grooves 24 are arranged on the opposite surfaces of the first bolt 22 and the second bolt 23, and the elastic part 25 is arranged in the grooves 24; the elastic part 25 comprises a spiral spring 251, a limiting rod 252, a limiting cylinder 253 and a limiting pin 254; the limiting rod 252 and the limiting cylinder 253 are respectively fixed in the grooves 24 of the first bolt 22 and the second bolt 23, the spiral spring 251 is sleeved on the limiting cylinder 253, the limiting cylinder 253 is sleeved on the limiting rod 252, and the limiting pin 254 is positioned on the inner side wall of the groove 24 close to the bottom; the bottom of the second bolt 23 is further provided with a friction layer 231, the surfaces of the friction layer 231, which are contacted with the fixed object, are mutually inosculated, so that the contact area with the fixed object is increased, longitudinal sliding or transverse rolling is prevented, and the friction layer 231 is made of asbestos fiber friction material;

example 2

Furthermore, the elastic component 25 between the first bolt 22 and the second bolt 23 is a spring 255, and the top of the spring 255 is fixedly connected to the bottom surface of the first bolt 22; and the outer surface of the nut 1 is a hexagonal body, and due to the design of multiple edges, when the nut is used for fastening objects, the nut is efficient and labor-saving and does not slip.

The working principle of the fastening screw is as follows:

the object to be fixed can be a rod-shaped object or a columnar object, and the rod-shaped object is taken as an example below;

1. when in use, the fixed cylinder 3 is sleeved at the interface of two fixed rod-shaped objects;

2. the wedge bolt 2 is put into the hole groove 31 of the fixed cylinder 3;

3. the large end of the nut 1 is sleeved on the fixed rod-shaped object from the small end of the fixing cylinder 3, then the nut 1 is rotated, the nut 1 is meshed with the threads on the wedge-shaped bolt 2, the wedge-shaped bolt 2 is vertically extruded along with the sliding of the nut 1 from large to small, the bolt 2 is pushed to be gradually extruded inwards, the bolt 2 is enabled to hold the rod-shaped object tightly, meanwhile, the elastic component 25 in the bolt 2 is compressed, the generated pressure in the vertical direction increases the friction force between the threads and between the bottom of the bolt 2 and the fixed rod-shaped object, the threads can be stably meshed, the fixed rod-shaped object cannot be loosened for a long time, and the fixed rod-shaped object is compressed to achieve the purpose of fixing; the possibility of damage to the entire device is reduced by the elastic member 25, and the surface of the friction layer 231 in contact with the fixed rod-like object is formed into a curved surface that fits each other, increasing the contact area with the fixed rod-like object, and enhancing the fixing effect.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A fastening screw comprising a nut (1); nut (1) is whole to be well logical cylinder or stage body, and its internal diameter is the round stage body, and is equipped with internal thread (11), its characterized in that on the inside wall: the fixing device is characterized by further comprising a fixing cylinder (3), the fixing cylinder (3) is integrally consistent with the inner diameter of the nut (1) in shape of a circular truncated cone, the outer diameter of the fixing cylinder is smaller than the inner diameter of the nut (1), the inner diameter of the fixing cylinder is larger than the diameter of a fixed rod-shaped object, a plurality of hole grooves (31) are uniformly distributed on the axial surface of the fixing cylinder, and the hole grooves (31) penetrate through the surface of the fixing cylinder (3); the bolt (2) is embedded in the hole groove (31), the upper part of the cross section of the bolt (2) is triangular, the longitudinal section of the bolt is trapezoidal, the top of the bolt is provided with an external thread (21), and the nut (1) and the bolt (2) are mutually meshed through the internal thread (11) and the external thread (21); in addition, the bolt (2) is divided into a first bolt (22) and a second bolt (23), the first bolt (22) is embedded in the second bolt (23), an elastic part (25) is arranged between the opposite surfaces of the first bolt (22) and the second bolt (23), a friction layer (231) is further arranged at the bottom of the second bolt (23), and the surfaces of the friction layer (231) contacting with the fixed object are arranged to be mutually matched surfaces.

2. A fastening screw according to claim 1, characterized in that: a plurality of grooves (24) are formed in the opposite surfaces of the first bolt (22) and the second bolt (23), and the elastic part (25) is arranged in the grooves (24); the elastic component (25) comprises a spiral spring (251), a limiting rod (252) and a limiting barrel (253), the limiting rod (252) and the limiting barrel (253) are respectively fixedly arranged in the grooves (24) of the first bolt (22) and the second bolt (23), the spiral spring (251) is sleeved on the limiting barrel (253), and the limiting barrel (253) is sleeved on the limiting rod (252).

3. A fastening screw according to claim 2, characterized in that: the elastic part (25) further comprises a limit pin (254); the limiting pin (254) is positioned on the inner side wall of the groove (24) close to the bottom.

4. A fastening screw according to claim 1, characterized in that: the elastic component (25) comprises elastic pieces (255), and the tops of the elastic pieces (255) are fixedly connected to the bottom surface of the first bolt (22).

5. A fastening screw according to claim 1, characterized in that: the number of the hole grooves (31) is six.

6. A fastening screw according to claim 1, characterized in that: the shape of the hole groove (31) is rectangular or trapezoidal.

7. A fastening screw according to claim 1, characterized in that: the outer surface of the nut (1) is hexagonal or truncated cone-shaped, and an anti-skid layer (12) is arranged on the outer surface.