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Low-noise and anti-rust-adhesion drum brake pad for new energy vehicle and preparation method thereof

A new energy vehicle, low-noise technology, applied in the field of vehicle brake pads, which can solve the problems of tires unable to rotate, dragging, and cars unable to move.

Active Publication Date: 2021-05-28
HUNAN BOYUN AUTOMOBILE BRAKE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce braking noise, most non-metallic copper-free drum pad formulas use high porosity to reduce noise, but when the surface of the friction material is porous, the rust on the dual material can easily penetrate into the pores on the surface of the brake pad. Brake discs / drums and brake linings sticking together, forming rust buildup
In severe cases, the car cannot move, or the tires cannot rotate and slip on the ground

Method used

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  • Low-noise and anti-rust-adhesion drum brake pad for new energy vehicle and preparation method thereof
  • Low-noise and anti-rust-adhesion drum brake pad for new energy vehicle and preparation method thereof
  • Low-noise and anti-rust-adhesion drum brake pad for new energy vehicle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The raw materials of low-noise, anti-rust and adhesion brake pads are as follows: 12% mineral fiber, 6% calcium hydroxide, 6% calcium oxide, 4% zinc powder, 10% calcium sulfate whisker, 3% friction powder, high aluminum vanadium 6% of soil, 3% of polyacrylonitrile fiber, 8% of glass fiber, 6% of artificial graphite, 11% of resin, 5% of rubber, and the balance of barite.

[0027] The preparation process of the non-metallic copper-free new energy vehicle drum brake pad of this embodiment is as follows:

[0028] (1) Mixing: first pre-mix the polyacrylonitrile fiber, mineral fiber and artificial graphite for 5 minutes according to the weight ratio to ensure that they are in a uniformly dispersed state, and then add calcium hydroxide, calcium oxide, and zinc powder in sequence according to the weight ratio, Calcium sulfate whiskers, friction powder, high-alumina bauxite, resin, rubber, and barite were stirred at high speed for 5 minutes, and finally glass fiber was added, an...

Embodiment 2

[0044] The raw materials of low-noise, anti-rust and adhesion brake pads are as follows: 10% mineral fiber, 10% calcium hydroxide, 5% calcium oxide, 5% zinc powder, 5% calcium sulfate whisker, 5% friction powder, high aluminum vanadium 5% soil, 5% polyacrylonitrile fiber, 5% glass fiber, 15% artificial graphite, 10% resin, 8% rubber, and the balance of barite.

[0045] The preparation method and testing method are the same as in Example 1.

[0046]The test results are as follows: the adhesion test results between the shoe and the drum show that the breakaway torque of the brake shoe made according to Example 2 of the present invention is 8.9 N·m, which is lower than the standard requirement. According to the international standard SAE J2521 noise test standard, the brake pads are tested for noise. The results show that the incidence rate of braking noise greater than 70 decibels is 5.6%, and the incidence rate of braking noise greater than 80 decibels is 1.2%. The friction pe...

Embodiment 3

[0048] The raw materials of low-noise, anti-rust and adhesion brake pads are as follows: 15% mineral fiber, 5% calcium hydroxide, 10% calcium oxide, 3% zinc powder, 20% calcium sulfate whisker, 2% friction powder, high aluminum vanadium 10% of soil, 2% of polyacrylonitrile fiber, 10% of glass fiber, 5% of artificial graphite, 15% of resin, 3% of rubber, and the balance of barite.

[0049] The preparation method and testing method are the same as in Example 1.

[0050] The test results are as follows: the adhesion test results between the shoe and the drum show that the breakaway torque of the brake shoe made according to Example 3 of the present invention is 13.1 N·m, which is lower than the standard requirement. According to the international standard SAE J2521 noise test standard, the brake pads are tested for noise. The results show that the incidence rate of brake pads with a braking noise greater than 70 decibels is 7.1%, and the incidence rate of braking noises greater t...

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Abstract

The invention belongs to the technical field of vehicle brake pads, and particularly relates to a low-noise and anti-rust-adhesion drum brake pad for a new energy vehicle. The low-noise and anti-rust-adhesion drum brake pad comprises the following raw material components in percentage by weight: 10-15% of mineral fiber, 5-10% of calcium hydroxide, 5-10% of calcium oxide, 3-5% of zinc powder, 5-20% of calcium sulfate whisker, 2-5% of friction powder, 5-10% of high-aluminum vanadine, 2-5% of polyacrylonitrile fiber, 5-10% of glass fiber, 5-15% of synthetic graphite, 10-15% of resin, 3-8% of rubber, and the balance of barite. The formula does not contain rusty metal such as iron, and the calcium hydroxide and the calcium oxide are added, so that the pH value of the brake pad is increased, and the brake pad has a good anti-rust effect. The zinc powder is added, so that the heat conductivity coefficient of a friction material is increased, decomposition of organic matter is relieved, heat fading of the friction material is restrained, meanwhile, the zinc powder serves as a second adhesive, combination among all components of the friction material is firmer, the real friction contact area is increased, the friction coefficient of a sample is increased, and the abrasion loss is reduced.

Description

technical field [0001] The invention belongs to the technical field of brake pads for vehicles, and in particular relates to a drum brake pad for new energy vehicles with low noise and anti-rust adhesion and a preparation method thereof. Background technique [0002] In recent years, new energy vehicles have received strong support from national policies due to their advantages such as low logistics costs and low pollution. With the continuous improvement of the production technology level of new energy vehicles, new energy vehicles have become one of the important markets of my country's automobile industry. [0003] New energy vehicles have the characteristics of low noise, so not only are their brake pads required to have a moderate and stable friction coefficient, but they are also required to have a lower incidence of braking noise than fuel vehicles. In order to reduce braking noise, most non-metallic copper-free drum pad formulas use high porosity to reduce noise, bu...

Claims

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Application Information

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IPC IPC(8): F16D69/02C09K3/14
CPCF16D69/028C09K3/149F16D2200/0065F16D2200/0026F16D2200/0086F16D2200/0095F16D2250/0069
Inventor 唐兵杨阳瞿辉李度成王坪龙
Owner HUNAN BOYUN AUTOMOBILE BRAKE MATERIALS
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