Dodecagonal brake bolt
By designing a twelve-angle brake bolt, the failure problem of traditional bolts in the high temperature and high stress environment of rail transit was solved, the heat dissipation and tensile strength of the bolt were improved, and the safety and reliability requirements of the braking system were met.
Patent Information
- Application Number
- CN202520567465.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-28
AI Technical Summary
Traditional bolts are prone to failure in the high-temperature and high-stress environment of the rail transit industry, and cannot meet the requirements of anti-loosening and temperature resistance of braking systems.
A dodecagonal brake bolt was designed, comprising a dodecagonal head, a smooth shank section, and a threaded section. The smooth shank section has an enlarged node, and a MoS2 coating is applied to the outer surface of the threaded section to improve heat dissipation and lubrication performance.
It improves the tensile strength and heat dissipation efficiency of bolts, ensures uniform transmission of installation torque, enhances the durability and safety of bolts, and is suitable for high temperature and high stress environments.
Smart Images
Figure CN223725102U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to bolt technical field, specifically relates to a twelve angle brake bolt. BACKGROUND
[0002] Although the traditional bolt such as DIN931 half thread and DIN933 full thread can satisfy basic connection demand, but in the key application needing to have tensile strength and high -efficient heat dissipation performance simultaneously, it is not good, especially in the high temperature and high stress environment such as brake system of rail transit industry, and it is easy to cause failure due to overheating, and this kind of traditional design usually only pays attention to basic connection function, and does not fully consider the demand of anti-loosening, high and low temperature resistance and effective heat dissipation under extreme conditions. Therefore, the existing bolt solution is difficult to meet the high standard requirement of rail transit industry to safety and reliability, especially in the key position such as brake system with higher requirement to anti-loosening and temperature resistance. SUMMARY
[0003] The utility model aims at providing twelve angle brake bolt, solves the technical problem that the existing bolt cannot satisfy the use requirement under the high temperature and high stress environment such as brake system of rail transit industry.
[0004] To solve the above technical problem, the utility model adopts the following technical scheme:
[0005] Twelve angle brake bolt, including bolt head and screw rod part, the bolt head is twelve angle structure, and the screw rod part is composed of light pole section and thread section, wherein the light pole section has at least one swelling node.
[0006] Further, the outer surface of the screw rod part is provided with a MoS2 coating.
[0007] Further, the bolt is suitable for various specifications above M3 specification.
[0008] Compared with the prior art, the utility model has the advantages that the utility model solves the problem that the traditional bolt is easy to fail under extreme conditions, wherein the twelve angle head structure ensures uniform torque transmission during installation, reduces the risk of thread damage, and provides clear identification information through laser engraving; the unique two swelling node design of the light pole section not only greatly improves the heat dissipation efficiency, effectively prevents part failure caused by high temperature during braking, but also enhances the tensile strength; the thread section meets the national standard, ensuring the dimensional accuracy and interchangeability; the MoS2 coating on the surface further increases the lubricity and heat conduction efficiency, reduces the installation resistance and improves the durability, the bolt performance grade reaches 10.9 level, the hardness is HV320~HV380 after quenching and tempering treatment, suitable for M3 and above specifications, widely used in key positions with high requirements for anti-loosening and high and low temperature resistance, significantly improving the overall safety and reliability. BRIEF DESCRIPTION OF DRAWINGS
[0009] The accompanying drawings are included to provide a further understanding of the present application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and serve to explain the present application, and do not constitute a limitation of the present application. In the drawings:
[0010] Figure 1 It is a structure diagram of the twelve-angle brake bolt of the present application;
[0011] Figure 2 It is a left view of Figure 1 ;
[0012] Figure 3 It is a front view of Figure 1 ; DETAILED DESCRIPTION
[0013] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0014] The present application will be further described in detail below with reference to the embodiments.
[0015] As shown in the drawings, the present application provides a specific embodiment of a twelve-angle brake bolt: Figures 1-3
[0016] The twelve-angle brake bolt comprises a bolt head 1 and a screw rod part. The bolt head 1 is a twelve-angle structure, which is used for uniformly transmitting installation torque and avoiding thread damage during installation. The bolt head 1 is laser-engraved with manufacturer code, performance grade and batch number, and is subjected to tolerance inspection according to GB / T 1894-a and GB / T 1184-c. The screw rod part is composed of a light rod segment 2 and a threaded segment 3. The light rod segment 2 has two enlarged nodes 4. The optimized design of the enlarged nodes 4 can realize maximum area heat dissipation of the screw rod part, effectively avoid part failure caused by high temperature during braking, and greatly improve the tensile strength. The threaded segment 3 is located at the rear end of the screw rod part, and the size conforms to the GB / T 196 standard and the tolerance conforms to the GB / T 197 standard.
[0017] Preferably, a MoS2 coating is arranged on the outer surface of the screw rod part, which increases lubrication and improves heat conduction efficiency.
[0018] The performance grade of the dodecagonal brake bolt of the embodiment is 10.9, which meets the GB / T 3098.1 standard, and the hardness after quenching and tempering is HW3207-HW380, and the bolt is suitable for various specifications above M3.
[0019] It should be noted that in this text, such as the term "include", "contain" or any other variant is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent to such process, method, article or device.
[0020] Although the embodiments of the utility model have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A dodecagonal stop bolt comprising a head portion and a shank portion, characterized in that: The bolt head is a twelve-corner structure, the screw rod part is composed of a smooth rod section and a threaded section, wherein the smooth rod section has at least one enlarged node.
2. The dodecagonal stop bolt according to claim 1, characterized in that: The outer surface of the screw rod part is provided with a MoS2 coating.
3. The dodecagonal stop bolt according to claim 1, characterized in that: The bolt is suitable for various specifications above M3.