An electronic vacuum pump

By improving the structure of the sound-absorbing pad in the electronic vacuum pump, the sound-absorbing and vibration-damping effect is enhanced, solving the problem of poor sound-absorbing and vibration-damping effect of the sound-absorbing pad in the existing technology, improving the stability and safety of the vehicle braking system, reducing noise and saving energy.

CN114857014BActive Publication Date: 2026-06-19XIAMEN HONGFA AUTOMOTIVE ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIAMEN HONGFA AUTOMOTIVE ELECTRONICS CO LTD
Filing Date
2022-06-08
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing electronic vacuum pump sound-absorbing pads have poor noise reduction and vibration damping effects, affecting the stability and safety of automotive braking systems.

Method used

By improving the structure of the sound-absorbing pad, including setting an elastic diaphragm, connecting rings and a sound-absorbing cover, an air intake chamber, a buffer chamber and an air passage are formed, increasing the volume of the air intake chamber. The arched and arc-shaped connecting sections of the elastic diaphragm are used to improve the resistance to airflow impact. Combined with the air passage and anti-misalignment ribs, stable installation is ensured, and the sound absorption and vibration reduction effect is enhanced.

Benefits of technology

It effectively enhances noise reduction and vibration damping, improves the stability and safety of the vehicle's braking system, reduces noise, and saves energy.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN114857014B_ABST
    Figure CN114857014B_ABST
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Abstract

This invention provides an electronic vacuum pump, including a pump body. The pump body includes a sound-absorbing cover, a sound-absorbing pad, and a rotor assembly. The sound-absorbing pad is disposed between the sound-absorbing cover and the rotor assembly. The sound-absorbing pad includes a connecting ring and an elastic diaphragm disposed within the connecting ring. The connecting ring, the elastic diaphragm, and the cover plate of the rotor assembly together form an air inlet chamber. The connecting ring of the sound-absorbing pad also has an air outlet hole communicating with the air inlet chamber. The sound-absorbing cover has a sound-absorbing cover fixing ring that abuts against the outer periphery of the elastic diaphragm. The middle part of the elastic diaphragm arches towards the sound-absorbing cover and is higher than the contact surface of the sound-absorbing cover fixing ring abutting against the elastic diaphragm. This effectively improves the noise reduction and vibration damping effect.
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