CN113048132A

CN113048132A - Bolt assembly

Info

Publication number: CN113048132A
Application number: CN202110440415.0A
Authority: CN
Inventors: 陈波; 钟德峰; 成慧威; 杜福洋
Original assignee: Sinotruk Jinan Fuqiang Power Co ltd
Current assignee: Sinotruk Jinan Fuqiang Power Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-06-29

Abstract

The invention aims to solve the problem of providing a bolt assembly, which increases the working surface, well transmits the torque force of a tool into a bolt and ensures that the bolt assembly is screwed down according to the expected torque force. The bolt comprises a column body and a bolt head fixed at one end of the column body, wherein an inner hexagonal groove is formed in the bolt head; the shaft is along keeping away from the direction of bolt head is light column section and double-screw bolt section in proper order, the diameter of light column section is less than the diameter of double-screw bolt section, the light column section overlaps in proper order and is equipped with flat pad and bullet pad, the internal diameter of flat pad and bullet pad is less than double-screw bolt section diameter.

Description

Bolt assembly

Technical Field

The invention relates to the field of bolt part manufacturing industry, in particular to a bolt assembly.

Background

The controller products need a safe and reliable working environment when working, and the working environment is as dry, clean, free of high temperature, free of vibration, free of radiation and the like as possible. The controller must therefore be located in a closed container of comparable conditions, protected from the adverse external environment.

The controller is accommodated by a shell of the controller, and for the unmoved controller, the construction of a special machine room is generally adopted to match with a common control cabinet, so that the construction of the working environment of the controller is ensured.

For small controllers for outdoor working environments, especially in mobile situations, the working environment must be isolated from the outdoor environment by the controller housing. According to the general technological characteristics of the controller, the shell must have an open cavity surface, the controller is installed in the shell, and then the shell is closed. The main sealing means is to tightly press the joint surface through bolts to ensure that the shells are connected into a whole, thereby realizing the isolation of the working environment of the controller from the external environment. Because the use amount of the bolts is more, the bolts are smaller, and the relative torque is larger, the quick and reliable screwing is very necessary.

At present, the main application is slotted or cross disk slotted screw assemblies, which have already completed the pre-assembly of spring washers, flat washers and bolts, however, the working groove surface is smaller, the slot teeth are shallow and thin, so that the working surface is smaller, screwing is suitable for general screwing, and for scenes with low bonding strength, but in scenes with high sealing and high bonding strength, the bolt head often cannot receive the torsion from a tool, so that the tool is separated from the groove of the bolt head midway, the groove shape of the bolt is worn or the tool is broken, and finally the expected screwing degree cannot be achieved.

Disclosure of Invention

The invention aims to solve the problem of providing a bolt assembly, which increases the working surface, well transmits the torque force of a tool into a bolt and ensures that the bolt assembly is screwed down according to the expected torque force.

The invention is realized by the following technical scheme:

a bolt assembly comprises a column body and a bolt head fixed at one end of the column body, wherein an inner hexagonal groove is formed in the bolt head;

the shaft is along keeping away from the direction of bolt head is light column section and double-screw bolt section in proper order, the diameter of light column section is less than the diameter of double-screw bolt section, the light column section overlaps in proper order and is equipped with flat pad and bullet pad, the internal diameter of flat pad and bullet pad is less than double-screw bolt section diameter.

Further, the light column section is in threaded connection with the screw column section.

Furthermore, the light column section and the thread connection gap of the thread section are fixed in a welding or gluing mode.

Further, the diameter of the light column section is 1/2-3/4 of the diameter of the thread section.

Compared with the prior art, the invention has the following beneficial effects:

1. the bolt head is provided with the inner hexagonal groove, so that the working surface area is large, the groove shape is deep, and the bearing capacity is strong. When the bolt is subjected to larger torsion, the bolt head is subjected to circumferential pressure of the tool, the friction of the working surface is increased, the connection working state is locked, the torsion of the tool is well transmitted into the bolt, and the bolt assembly is ensured to be screwed down according to the expected torsion;

2. the diameter of the light column section is smaller than that of the screw column section, the light column section is sequentially sleeved with a flat pad and an elastic pad, and the inner diameters of the flat pad and the elastic pad are smaller than that of the screw column section, so that the elastic pad and the flat pad are ensured to be always penetrated on the light column section to form a combined part, and the combined part cannot be decomposed due to transportation and other reasons;

3. the light column section is in threaded connection with the threaded section, the flat pad and the elastic pad can be sleeved on the light column section firstly, then the connection between the light column section and the threaded section is realized, and the rapid combination is realized.

Drawings

FIG. 1 is a schematic view of the bolt assembly of the present invention in its entirety;

FIG. 2 is a schematic view of the shaft of the present invention;

fig. 3 is a side view of the bolt head according to the present invention;

in the figure: 1. the bolt head, 2, the bullet pad, 3, the flat pad, 4, the screw thread section, 5, interior hexagonal recess, 6, the light column section.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

Example 1

As shown in fig. 1-3, the present embodiment discloses a bolt assembly, which includes a column body, an elastic pad 2, a flat pad 3 and a bolt head 1, wherein the bolt head 1 is located at one end of the column body and is processed with an inner hexagonal groove 5, a smooth pillar section 6 and a threaded section 4 are sequentially processed on the column body along a direction away from the bolt head 1, and the diameter of the smooth pillar section 6 is 3/4 of the threaded section 4. The light beam section 6 is sequentially sleeved with the flat pad 3 and the elastic pad 2, and the inner diameters of the flat pad 3 and the elastic pad 2 are smaller than the diameter of the thread section 4.

This bolt sub-assembly is processing in mill and puts into use after the sub-assembly again, and in the mill, shaft integral type processing forms the back, turns out light column section 6 earlier, then makes the internal diameter expansion wear light column section 6 after filling up 3 and bullet pad 2 heating, waits flat pad 3 and bullet pad 2 cooling back, and the internal diameter that fills up 3 and bullet pad 2 is less than screw thread section 4 diameters, then processes out the screw thread on screw thread section 4.

When the bolt assembly is put into use, the flat pad 3 and the elastic pad 2 can not be separated from the smooth column section 6 all the time, and the hexagonal head screwing tool is matched with the inner hexagonal groove of the bolt head 1 to carry out integral installation.

In the embodiment, the bolt head is provided with the inner hexagonal groove, so that the working surface area is large, the groove shape is deep, and the bearing capacity is high. When the bolt head is subjected to larger torsion, the circumferential pressure of the tool is applied to the bolt head, the friction of the working surface is increased, the connection working state is locked, the torsion of the tool is well transmitted into the bolt, and the bolt assembly is ensured to be screwed up according to the expected torsion.

Example 2

In order to facilitate the integral assembly, an internal thread is processed at one end of the thread section 4, an external thread is processed at one end of the light beam section 6, the flat pad 3 and the elastic pad 2 are sleeved on the light beam section 6, then the light beam section 6 is in threaded connection with the thread section 4, and then the threaded connection gap between the light beam section 6 and the thread section 4 is fixed in a welding or gluing mode. By the design, the processing is more convenient, and the firmness of the column body is ensured.

Claims

1. A bolt assembly comprises a column body and a bolt head fixed at one end of the column body, and is characterized in that an inner hexagonal groove is formed in the bolt head;

2. The bolt assembly of claim 1, wherein the shank segment is threaded onto the stud segment.

3. The bolt assembly defined in claim 2, wherein the light post section and the threaded connection seam of the threaded section are fixed by welding or gluing.

4. The bolt assembly of any one of claims 1-3, wherein the diameter of the light post segment is 1/2-3/4 of the diameter of the threaded segment.