Inner pump cover rotor oil pump installed on backside of pump cover

Abstract

The invention discloses an inner pump cover rotor oil pump installed on the backside of a pump cover. The pump comprises a pump cover 6, a pump body 2, an inner rotor 3 and an outer rotor 4, wherein the outer rotor 4 is installed in the rotor hole of the pump body 2, the inner rotor 3 is sleeved in the hole of the outer rotor 4, the inner rotor 3 is provided with a stepped locating ring 31, the stepped locating ring 31 is located on the left side of the inner rotor 3, and the pump cover 6 is installed at the backsides of the inner rotor 3, the outer rotor 4 and the pump body 2. Because an oil pump front pump cover installed on the frontage of an engine is replaced by an inner pump cover installed on the backside of the engine, the invention has the advantages that the problem of surface oil leakage is solved, and the material cost is lowered; since the pump cover is installed in the inner part of the oil pump, the faying face of the pump cover and the pump body does not require a sealing gasket, a working procedure for manufacturing a sealing groove is omitted, the manufacturability of machine work is improved, and the production cost is reduced; and especially, after the front pump cover is replaced by the inner pump cover, the sealing ring hole of the front pump cover is in an integral structure, thus the installation sealing degree of the crank shaft oil sealing hole and crank shaft of the front pump cover is improved, and the sealing efficacy is improved.

Description

technical field [0001] The invention relates to a rotor oil pump of a car engine, in particular to an inner pump cover rotor oil pump installed on the back of the pump cover. Background technique [0002] The bottom of the aluminum front end cover of the existing car engine is provided with an integrally connected front pump cover rotor oil pump, including a pump cover 1, a pump body 2, an inner rotor 3 and an outer rotor 4 (such as figure 1 shown), the inner rotor 3 and the outer rotor 4 are installed in the rotor hole of the pump body 2, the inner rotor 3 has a stepped positioning ring 31, the stepped positioning ring 31 is located on the right side of the inner rotor 3, and the pump cover 1 is installed inside 1. On the front of the outer rotor, the joint surface of the pump cover 1 and the pump body 2 is provided with a special-shaped sealing ring 5. Its disadvantages are: the assembly and centering of the pump cover 1 is difficult, which affects the sealing performance...

AI Technical Summary

Problems solved by technology

Its disadvantages are: the assembly and centering of the pump cover 1 is difficult, which affects the sealing performance of the oil seal and the shaft head, and the sealing performance of the connecting plane is poor, which is prone to leakage. At the same time, it is difficult to process the sealing groove and the precision is difficult to control , low production efficiency, high manufacturing cost, not suitable for the technical requirements of modern high-performance engines

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