Vacuum pump

Abstract

The invention discloses a vacuum pump. According to the vacuum pump, a connecting shaft is arranged on one side of a pump body, and a rotor is arranged on the other side of the pump body; a connecting piece for bearing external power is arranged at one end of the connecting shaft, and the other end of the connecting shaft passes through a through hole of the pump body and is connected with the rotor; a sliding block is clamped on the rotor, end face sliding sheets are arranged at two ends of the sliding block, and the rotor, the sliding block and the end face sliding sheets are covered by a pump cover; the pump cover is fixedly connected with the pump body; the sliding block is made of a spring steel sheet; the end face sliding sheets are made of powder metallurgy materials, and the trade mark of the powder metallurgy materials is F0203J; the pump cover is made of a stamping material, and the trade mark of the stamping material is DC06; and the cavity wall of an inner cavity of the pump cover has an elliptical structure, and is machined for one time by an end mill. The vacuum pump is high in reliability and low in noise, avoids clamping stagnation and can ensure the reliability of a braking system well; a connecting piece is convenient to install, so that the defect of the conventional structure is overcome well; and the vacuum pump has a simple structure, is appropriate in material selection and convenient to manufacture, has high economic and technical value, and is suitable for large-scale popularization and application.

Description

technical field [0001] The invention belongs to the field of automobile braking and supercharging systems, and in particular relates to a vacuum pump in the automobile braking and supercharging systems. Background technique [0002] The vacuum pump is an important component of the automobile braking and supercharging system. It is assembled between the vacuum booster and supercharging system during installation. The existing vacuum pump includes a pump body, one side of the pump body is provided with a connecting shaft, one end of the connecting shaft is sleeved with a gear for carrying external power (such as a motor), and the other end of the connecting shaft passes through the through hole on the pump body Finally, it is connected with the rotor on the other side of the pump body and drives the rotor to rotate together. A slide block is clamped on the rotor, and the two ends of the slide block are provided with end surface slide pieces, and the slide block is made of eng...

AI Technical Summary

Problems solved by technology

[0003] 1. Because the slider is made of engineering plastics, and engineering plastics are brittle and prone to breakage, this will cause the slider to break easily after being stressed, which will cause the rotor to be stuck, resulting in mechanical failure of the vacuum pump and poor reliability. Cause the brake system to fail, causing safety accidents

In addition, since the end slides are made of graphite, and the wear resistance of graphite is poor, the end slides are prone to dust after excessive wear, which will also cause the rotor to stick, thereby further reducing the reliability of the vacuum pump;

[0004] 2. Since the cavity wall of the inner cavity of the pump cover is an elliptical structure, which is spliced ​​by 5 segments of arcs, there is still a certain deviation between the ellipse and the real ellipse due to factors such as processing errors, which will cause the end slide to rotate The jitter is severe, resulting in high noise;

[0005] 3. Because the connecting shaft carries the external power through the gear, the installation of the gear is very inconvenient, and the cost of the gear is high and the weight is heavy

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