Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Steel brake drum

A brake drum, carbon steel technology, applied in the direction of brake drum, slack adjuster, gear shifting mechanism, etc., can solve the problems of inability to achieve rapid cooling, poor toughness, early failure of the brake drum, etc. Improve service life and improve overall performance

Inactive Publication Date: 2017-03-22
山西汤荣机械制造股份有限公司
View PDF9 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the materials of automobile brake drums at home and abroad are all HT200-HT300. Although some enterprises use vermicular iron to produce them, whether it is gray iron or vermicular iron, due to their low strength and poor toughness, it is inevitable that they will be damaged during use. Cause early failure of the brake drum, such as cracking of the braking surface, falling blocks, falling off of the flange surface, etc., which greatly affect the driving safety
[0003] In addition, during the use of the brake drum, the friction force generated by the friction with the brake shoe achieves the braking effect of the whole vehicle. Although the gray iron material has good thermal conductivity, the large amount of heat generated by the friction on the braking surface only depends on the The material itself and air conduction cannot achieve the purpose of rapid cooling, so most long-distance and truck drivers install water spraying devices to cool down the brake drum, which can easily cause cracks in gray iron or vermicular iron materials due to sudden temperature drops or cracking phenomenon

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Steel brake drum
  • Steel brake drum
  • Steel brake drum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of steel brake drum, it comprises brake drum body 1, the brake surface of described brake drum body 1 is evenly provided with 6 groups of ventilating heat dissipation holes 2 arranged uniformly, each group of ventilating heat dissipation holes 2 The number is 4, and the center-to-center distance angle B of the adjacent two adjacent holes in two groups of ventilation and cooling holes 2 is 12°; and the adjacent two holes in each group of ventilation and cooling holes 2 are along the braking The axial spacing A of the drum body 1 is 12 mm, and the spacing angle C between two adjacent holes in each group of ventilation and cooling holes 2 perpendicular to the axial direction of the brake drum body 1 is 4°.

[0020] The holes in the ventilation and heat dissipation holes 2 in the present invention are circular, and the diameter of the holes is φ6mm.

[0021] The brake drum body 1 of the present invention is made of cast steel, and the cast steel is made of low-carbon...

Embodiment 2

[0024] A steel brake drum, which includes a brake drum body 1, 8 groups of ventilation and cooling holes 2 arranged uniformly on the braking surface of the brake drum body 1, each group of ventilation and cooling holes 2 The number is 8, and the center-to-center distance angle B of the adjacent two holes in the adjacent two groups of ventilation and heat dissipation holes 2 is 18°; and the adjacent two holes in each group of ventilation and heat dissipation holes 2 are along the The axial spacing A of the drum body 1 is 20 mm, and the spacing angle C between two adjacent holes in each group of ventilation and cooling holes 2 perpendicular to the axial direction of the brake drum body 1 is 10°.

[0025] The holes in the ventilation and heat dissipation holes 2 are oval. The brake drum body 1 is made of cast steel, and the cast steel is made of high carbon steel, wherein the carbon content in the high carbon steel is 0.6-0.8% by weight. The braking surface of the brake drum bod...

Embodiment 3

[0027] A steel brake drum, which includes a brake drum body 1, 8 groups of ventilation and cooling holes 2 arranged uniformly on the braking surface of the brake drum body 1, each group of ventilation and cooling holes 2 The number is 8, and the center-to-center distance angle B of the adjacent two holes in the adjacent two groups of ventilation and heat dissipation holes 2 is 18°; and the adjacent two holes in each group of ventilation and heat dissipation holes 2 are along the The axial spacing A of the drum body 1 is 20 mm, and the spacing angle C between two adjacent holes in each group of ventilation and cooling holes 2 perpendicular to the axial direction of the brake drum body 1 is 10°. The hole in the ventilation and heat dissipation hole 2 is circular, and the diameter of the hole is φ15mm when the hole is circular.

[0028] The brake drum body 1 is made of cast steel, and the cast steel is made of alloy steel, wherein the carbon content in the alloy steel is 0.2-0.8%...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
tensile strengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a steel brake drum. The steel brake drum comprises a brake drum body, wherein the brake drum body is formed by integrally casting cast carbon steel or cast alloy steel; or is formed by integral spinning machining of a low-carbon steel plate; a brake working surface of the brake drum body is provided with a hardened layer; the surface hardness of the hardened layer is 180 to 241HBW; the cast carbon steel is any one of low carbon steel, medium carbon steel or high carbon steel; the cast alloy steel contains one or two alloy elements of chromium, nickel and molybdenum; the thickness of the low-carbon steel plate is 16 to 25mm, the tensile strength is greater than or equal to 360MPa, and the elongation percentage is greater than or equal to 24 percent; and the hardened layer is subjected to one or more of surface carburizing treatment, laser surface impact hardening treatment, nitriding treatment and surface rolling treatment. The brake drum disclosed by the invention is formed by integrally casting the cast carbon steel or the cast alloy steel, or is formed by integral spinning machining of the low-carbon steel plate, so that comprehensive performance of the steel brake drum is improved, and the service life of the brake drum is prolonged.

Description

technical field [0001] The invention belongs to the field of brake drums for vehicles, and in particular relates to a steel brake drum used for trucks and large and medium-sized passenger cars. Background technique [0002] Because gray iron material has good thermal conductivity, it is widely used in the production of automobile brake drum products. At present, the materials of automobile brake drums at home and abroad are all HT200-HT300. Although some enterprises use vermicular iron to produce them, whether it is gray iron or vermicular iron, due to their low strength and poor toughness, it is inevitable that they will be damaged during use. It causes early failure of the brake drum, such as cracking, falling off of the braking surface, and falling off of the flange surface, which greatly affects driving safety. [0003] In addition, during the use of the brake drum, the friction force generated by the friction with the brake shoe achieves the braking effect of the whole...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F16D65/10F16D65/78C22C38/18C22C38/08C22C38/12C22C38/22C22C38/40
CPCF16D65/10C22C38/08C22C38/12C22C38/18C22C38/22C22C38/40F16D65/78F16D2200/0021F16D2250/0007F16D2250/0023F16D2250/0038
Inventor 曹全青王晓妍靳宏斌潘园园
Owner 山西汤荣机械制造股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com