CN110005670B

CN110005670B - Fastening screw

Info

Publication number: CN110005670B
Application number: CN201910260991.XA
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: 2023-12-19
Anticipated expiration: 2039-04-02
Also published as: CN110005670A

Abstract

The invention relates to a fastening screw, which comprises a bolt, a nut and a fixed cylinder; the whole nut is a hollow round table, and the inner side wall of the nut is provided with an internal thread; the fixed cylinder is a middle through truncated cone, 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 formed in the opposite surfaces of the upper part and the lower part, a spiral spring is arranged in each groove, and a friction layer is further 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 strength reduction caused by the opening; the wedge bolt is internally provided with a spiral spring, so that friction force between threads is increased by the generated pressure in the vertical direction, and the threads can be firmly meshed without loosening for a long time.

Description

Fastening screw

Technical Field

The invention belongs to the field of fixing tools, and particularly relates to the field of fasteners.

Background

The traditional fastener includes bolt, nut etc. and bolted connection is the common connection mode that gets in machinery, in the building trade now, the use of scaffold frame is very popular, but generally all use grafting or screw fastening connection, if adopt screw connection, generally still need go out the screw thread on the steel pipe, connect when using the nut, but go out the screw thread while, also make the intensity of screw thread department be less than the intensity in other places far away, can produce deformation crack, not hard up, the condition such as smooth silk after long service time moreover, also have inconvenience when using.

Disclosure of Invention

The invention aims to solve the problems and provide the fastening screw which is reasonable in design, convenient to use and good in performance.

The invention realizes the above purpose through the following technical scheme:

a fastening screw comprising a nut; the nut is integrally a through cylinder or a platform body, the inner diameter of the nut is a circular truncated cone body, the inner side wall of the nut is provided with an internal thread, the nut further comprises a fixed cylinder, the whole nut is a circular truncated cone 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 along the axial surface position of the fixed cylinder, and the hole grooves penetrate through the surface of the fixed cylinder; the 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 external threads, and the nut and the bolt are meshed with each other through the internal threads and the external threads; the bolt is divided into a first bolt and a second bolt, the first bolt is embedded in the second bolt, an elastic component 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 contact surface of the friction layer and the fixed object is set to be a mutually matched surface.

As a further optimization scheme of the invention, a plurality of grooves are formed in the opposite surfaces of the first bolt and the second bolt, and the elastic component is arranged in the grooves; the elastic component includes coil spring, gag lever post, spacing section of thick bamboo, gag lever post and spacing section of thick bamboo are fixed respectively and are located in the recess of first bolt and second bolt, in addition the coil spring cover is located on the spacing section of thick bamboo, and spacing section of thick bamboo cover is located on the gag lever post.

As a further optimization scheme of the invention, the elastic part further comprises a limiting pin; the limiting pin is positioned on the inner side wall of the groove close to the bottom.

As a further optimization scheme of the invention, the elastic component comprises elastic pieces, and the tops of the elastic pieces are fixedly connected to the bottom surface of the first bolt.

As a further optimization scheme of the invention, the number of the hole slots is 6.

As a further optimization scheme of the invention, the shape of the hole groove is rectangular or trapezoidal.

As a further optimization scheme of the invention, the outer surface of the nut is hexagonal or round table-shaped, and an anti-slip layer is arranged on the outer surface.

The invention has the beneficial effects that:

1) The screw is more convenient than the existing fastening piece;

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

3) The wedge bolt is internally provided with a spiral spring, so that friction force between threads is increased by the generated pressure in the vertical direction, and the threads can be firmly meshed 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 a bolt of the present invention;

FIG. 4 is a schematic longitudinal cross-sectional view of a bolt of the present invention;

FIG. 5 is an enlarged view of a portion of the bolt of the present invention at A;

FIG. 6 is a schematic view of the structure of the nut of the present invention;

FIG. 7 is a schematic view of the structure of the fixing barrel of the present invention;

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

FIG. 9 is a schematic left-hand view of embodiment 2 of the present invention;

FIG. 10 is a schematic view of a transverse cross section 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 limit rod; 253. a limiting cylinder; 254. a limiting pin; 255. a spring plate; 3. a fixed cylinder; 31. and a hole groove.

Detailed Description

The following detailed description of the present application is provided in conjunction with the accompanying drawings, and it is to be understood that the following detailed description is merely illustrative of the application and is not to be construed as limiting the scope of the application, since numerous insubstantial modifications and adaptations of the application will be to those skilled in the art in light of the foregoing disclosure.

Example 1

A fastening screw as shown in fig. 1 to 7 comprises a bolt 2 and a nut 1; the whole nut 1 is a hollow round table, and the inner side wall of the nut is provided with an internal thread 11; the outer surface of the outer shell is also provided with an anti-slip layer 12; the fixing cylinder 3 is a hollow circular truncated cone, the outer diameter of the fixing cylinder 3 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 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 has the same projection shape as the hole grooves 31 and is respectively arranged in a plurality of hole grooves 31, 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 external threads 21, and the nut 1 and the bolt 2 can be meshed with each other through the external threads and the internal 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 component 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 component 25 is arranged in the grooves 24; the elastic component 25 comprises a coil spring 251, a limit rod 252, a limit cylinder 253 and a limit pin 254; the limiting rod 252 and the limiting cylinder 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 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, close to the bottom, of the groove 24; the bottom of the second bolt 23 is further provided with a friction layer 231, the surface of the friction layer 231 contacted with the fixed object is set to be a mutually matched surface, the contact area with the fixed object is increased, the generation of longitudinal sliding or transverse rolling is prevented, and the friction layer 231 is made of asbestos fiber friction material;

example 2

Further, the elastic member 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; the outer surface of the nut 1 is a six-edge body, and the design of multiple edges is convenient for fastening objects, so that the nut is efficient and labor-saving and does not slip. The working principle of the fastening screw is as follows:

the fixed object may be a rod-like object or a columnar object, and the rod-like 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. placing the wedge bolt 2 into the hole groove 31 of the fixed cylinder 3;

3. the large end of the nut 1 is sleeved on a fixed rod-shaped object from the small end of the fixed cylinder 3, then the nut 1 is rotated, the nut 1 is meshed with threads on the wedge-shaped bolt 2, as the diameter of the nut 1 is from large to small, the wedge-shaped bolt 2 is vertically extruded along with the sliding of the nut 1, the bolt 2 is pushed to be gradually extruded inwards, so that the bolt 2 tightly holds the rod-shaped object, meanwhile, the elastic part 25 in the bolt 2 is compressed, the generated pressure in the vertical direction increases friction force between the threads and between the bottom of the bolt 2 and the fixed rod-shaped object, the threads can be firmly meshed, and the fixed rod-shaped object cannot be loosened for a long time, so that the fixed object is compressed, and the purpose of fixing is achieved; the elastic member 25 reduces the possibility of damage to the whole device, and the friction layer 231 and the surface contacting the rod-shaped object are provided with curved surfaces which are matched with each other, so that the contact area with the rod-shaped object is increased, and the fixing effect is enhanced.

The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.

Claims

1. A fastening screw comprising a nut (1); the nut (1) is integrally a through cylinder or a platform body, the inner diameter of the nut is a round platform body, and the inner side wall of the nut is provided with an internal thread (11), and the nut is characterized in that: the nut fixing device further comprises a fixing cylinder (3), wherein the whole fixing cylinder (3) is in a round table shape consistent with the inner diameter of the nut (1), 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 external threads (21), and the nut (1) and the bolt (2) are meshed with each other through the external threads (11, 21); 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 component (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 contact surfaces of the friction layer (231) and the fixed object are set to be identical surfaces.

2. A fastening screw according to claim 1, wherein: a plurality of grooves (24) are formed in the opposite surfaces of the first bolt (22) and the second bolt (23), and an elastic part (25) is arranged in the grooves (24); the elastic component (25) includes coil spring (251), gag lever post (252), spacing section of thick bamboo (253), in gag lever post (253) and spacing section of thick bamboo (253) are fixed respectively and are located recess (24) of first bolt (22) and second bolt (23), in addition coil spring (251) cover is located on spacing section of thick bamboo (253), and spacing section of thick bamboo cover (253) are located on gag lever post (252).

3. A fastening screw according to claim 2, wherein: the elastic part (25) further comprises a limiting 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, wherein: the elastic component (25) includes shell fragment (255), and the top of a plurality of shell fragment (255) is fixed connection on the bottom surface of first bolt (22).

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

6. A fastening screw according to claim 1, wherein: the shape of the hole groove (31) is rectangle or trapezoid.

7. A fastening screw according to claim 1, wherein: the outer surface of the nut (1) is hexagonal or round table, and an anti-slip layer (12) is arranged on the nut.