Air entering/draining mechanism for membrane type automobile electric vacuum pump
An electric vacuum pump and diaphragm type technology, which is applied in variable capacity pump components, machines/engines, liquid variable capacity machines, etc., can solve problems such as failure of the brake booster system, impact on service life, and low safety factor, and achieve The effects of balanced operation, dust prevention, and large air extraction
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[0021] Combine below Figure 1 to Figure 8 Specific examples:
[0022] Diaphragm-type automobile electric vacuum pump, including motor 1, pump body 4, left and right end cover assembly 2, piston assembly 3, mandrel 5 with eccentric hole, balance weight 6 matched with mandrel 5, with check valve and sound absorption Sponge air outlet end cover assembly 7. The internal cavity of the left and right end cover assembly 2 is divided into a suction cavity 24 and an exhaust cavity 25. The pump body 4 is provided with an intake and exhaust passage 41, which respectively communicate with the suction cavity 24, the exhaust cavity 25 and the side plate of the left and right end cover assemblies. 23 is provided with two sets of holes 26 and 27 respectively communicated with the suction chamber 24 and the exhaust chamber 25. The one-way valve 22 controls the one-way gas flow direction of suction and exhaust respectively; the two opposed piston assemblies 3 are formed by the diaphragm 31 The met
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