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A drum brake pad for new energy vehicles with low noise and anti-rust adhesion and preparation method thereof

A new energy vehicle, low-noise technology, applied in the field of vehicle brake pads, can solve problems such as dragging, tires cannot be rotated, cars cannot move, etc., and achieves an increase in the area of ​​the friction film, inhibition of rust, and excellent anti-rust adhesion characteristics. Effect

Active Publication Date: 2022-06-21
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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  • A drum brake pad for new energy vehicles with low noise and anti-rust adhesion and preparation method thereof
  • A drum brake pad for new energy vehicles with low noise and anti-rust adhesion and preparation method thereof
  • A drum brake pad for new energy vehicles with low noise and anti-rust adhesion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0028] (1) Mixing: first premix polyacrylonitrile fiber, mineral fiber and artificial graphite by weight ratio for 5 minutes to ensure that they are in a uniformly dispersed state, then add calcium hydroxide, calcium oxide, and zinc powder in turn by weight ratio, Calcium sulfate whiskers, friction powder, high alumina vanadium, resin, rubber, and barite were stirred at high speed for 5 minutes, and finally added glass fiber, and stirred again at high speed for 2 minutes;

[0029] (2) Hot press...

Embodiment 2

[0043] The raw material composition of the low-noise, anti-rust-adhesion brake pad is as follows: mineral fiber 10%, calcium hydroxide 10%, calcium oxide 5%, zinc powder 5%, calcium sulfate whisker 5%, friction powder 5%, high alumina vanadium Soil 5%, polyacrylonitrile fiber 5%, glass fiber 5%, artificial graphite 15%, resin 10%, rubber 8%, barite balance.

[0044] The preparation method and testing method are the same as those in Example 1.

[0045]The test results are as follows: The test results of the adhesion between the shoe and the drum show that the release 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 of braking noise of brake pads greater than 70 decibels is 5.6%, and the incidence of braking noise greater than 80 decibels is 1.2%. The...

Embodiment 3

[0047] The raw material composition of the low-noise, anti-rust-adhesion brake pad is as follows: mineral fiber 15%, calcium hydroxide 5%, calcium oxide 10%, zinc powder 3%, calcium sulfate whisker 20%, friction powder 2%, high aluminum vanadium Soil 10%, polyacrylonitrile fiber 2%, glass fiber 10%, artificial graphite 5%, resin 15%, rubber 3%, barite balance.

[0048] The preparation method and testing method are the same as those in Example 1.

[0049] The test results are as follows: The test results of the adhesion between the shoe and the drum show that the release 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 of braking noise of brake pads greater than 70 decibels is 7.1%, and the incidence of braking noise greater than 80 decibels is 2.3%....

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Abstract

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 and adhesion. Calcium oxide 5-10%, calcium oxide 5-10%, zinc powder 3-5%, calcium sulfate whisker 5-20%, friction powder 2-5%, high alumina bauxite 5-10%, polyacrylonitrile fiber 2-5%, glass fiber 5-10%, artificial graphite 5-15%, resin 10-15%, rubber 3-8%, barite balance. Because the formula of the present invention does not contain rusty metals such as iron, the addition of calcium hydroxide and calcium oxide increases the pH of the brake pad and has a good antirust effect. The addition of zinc powder increases the thermal conductivity of the friction material and eases the decomposition of organic matter, thereby inhibiting the thermal decline of the friction material. At the same time, the zinc powder acts as a second adhesive to make the combination of the various components of the friction material more effective. Strong, the real friction contact area increases, so that the friction coefficient of the sample increases and the wear amount decreases.

Description

technical field [0001] The invention belongs to the technical field of vehicle brake pads, 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 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] The new energy vehicle has the characteristics of low noise, so it is not only required that its brake pads have a moderate and stable friction coefficient, but also that its braking noise rate is lower than that of fuel vehicles. In order to reduce braking noise, most non-metallic copper-free drum plate formulas use high porosity to reduce noise, but when the surface of the friction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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