Double steel back lining lubricating pump

Abstract

The invention provides a double steel back lining lubricating pump. The pump comprises a pump body 1, a pump cover 2, a driven shaft 3, a driven gear 4, a driving shaft 5, a driving gear 6 and steel back linings 7, wherein the driving shaft 5 is arranged in shaft holes of the pump body 1 and the pump cover 2, and the middle part of the driving shaft 5 is in interference connection with the driving gear 6; the outer end of the driven shaft 3 is in interference connection with the pump cover 2, and the inner end of the driven shaft 3 is arranged in the shaft hole of the pump body 1; the driven gear 4 is sleeved on the middle part of the driven shaft 3 by the two steel back linings 7; and balance grooves 71 arranged on the inner surfaces of the two steel back linings 7 are opposite in direction. Because the driven gear 4 is sleeved on the driven shaft 3 by the two steel back linings 7, and the balance grooves 71 arranged on the inner surfaces of the two steel back linings 7 are opposite in direction, the steel back linings 7 can generate inward thrust while rotating, and the inward thrust and the outward thrust which is generated due to the pressure in a middle oil storage groove are kept balanced, so the scratch on the surface of the pump cover and abrasion of the shaft hole ends is avoided and the safety, reliability and service life of the lubricating pump are improved.

Description

Technical field [0001] The invention relates to a gear type oil pump, in particular to a double-steel back liner oil pump with high safety and reliability and long service life. Background technique [0002] The structure of the existing gear oil pump is as figure 1 As shown, it includes a pump body 1, a pump cover 2, a driven shaft 3, a driven gear 4, a driving shaft 5, and a driving gear 6; the outer end of the driven shaft 3 is in interference connection with the pump cover 2, and the inner end is installed in In the shaft hole of the pump body 1, the driven gear 4 is directly sleeved in the middle of the driven shaft 3; the driving shaft 5 is installed in the shaft holes of the pump body 1 and the pump cover 2, and the middle part is in an interference connection with the driving gear 6. Its disadvantages are: because the driven gear 4 is directly sleeved in the middle of the driven shaft 3, due to the small fit clearance and the lubricating oil holes are evenly distributed ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a double-steel-backed bushing oil pump to solve the problem of occlusion and burning caused by the direct friction between the driven gear and the driven shaft due to the direct friction of the same material Improve the lubrication performance, improve the stability and reliability of the driven gear movement, and improve the safety and service life of the oil pump

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