Air entering/draining mechanism for membrane type automobile electric vacuum pump

Abstract

The invention belongs to the field of an automobile brake assisting system and particularly relates to an air entering / draining mechanism for a membrane type automobile electric vacuum pump. The air entering / draining mechanism for the membrane type automobile electric vacuum pump disclosed by the invention comprises a motor and a pump body, wherein an air entering / draining channel is arranged on the pump body; left and right end cover components are arranged at the left and right ends of the pump body; when a forming chamber in the membrane is maximal, the air entering / draining mechanism is under air exhaust state; when the forming chamber in the membrane is under negative pressure and generates suction force, and the forming chamber volume at the oppositely arranged piston component is minimal, the air entering / draining mechanism is under the exhausting state; a counterbalance matched with a spindle is arranged on the pump body. The air entering / draining mechanism for the membrane type automobile electric vacuum pump has the beneficial effects of better air exhaust property, higher safe coefficient, longer service life and accumulative work time reaching above 1200 hours.

Description

technical field [0001] The invention belongs to the field of automobile brake boosting systems, in particular to an intake and exhaust mechanism of a diaphragm type electric vacuum pump for automobiles. Background technique [0002] With the reduction of non-renewable resources and increasingly stringent emission regulations, energy conservation and emission reduction, and environmental protection are urgent needs of today's society. The development of new energy vehicles will be the main direction to solve emissions. Traditional vehicles use the intake system of the engine to meet the vacuum requirements of the vacuum booster, while new energy vehicles have no engine, and the vacuum booster of the car brake lacks a vacuum power source. Can not work normally. Therefore, there is a need for a device that does not rely on engine power and can provide a vacuum source in a timely manner. The existing electric vacuum pump has the following problems: 1. The safety factor is low....

AI Technical Summary

Problems solved by technology

The existing electric vacuum pump has the following problems: 1. The safety factor is low. Once a part is damaged, the entire brake booster system will fail; 2. The temperature rises. Due to the dry friction of the internal parts, the temperature rises rapidly under high-speed operation , affecting the service life; 3. The sealing performance is poor, because the graphite powder after dry friction is discharged from the pump body, the air outlet must be small, there is no waterproof measure, and there are strict requirements for installation

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