Novel aluminum alloy transmission shaft

Abstract

The invention relates to a novel aluminum alloy transmission shaft. The transmission shaft comprises an aluminum alloy shaft pipe, one end of the aluminum alloy shaft pipe is provided with an aluminumalloy universal joint fork, the other end of the aluminum alloy shaft pipe is provided with an aluminum alloy spline sleeve, and an integral structure is formed; the aluminum alloy universal joint isconnected with a second flange fork through a second cross shaft, and the aluminum alloy spline sleeve is matched with a spline shaft fork and connected with a first flange fork through a first crossshaft; the aluminum alloy spline sleeve and the spline shaft fork are matched with each other to form a spline pair, a sheath is arranged outside the spline shaft fork, the junction between the aluminum alloy spline sleeve and the spline shaft fork is covered by the sheath, and a maintenance-free sheath oil seal is arranged between the sheath and the aluminum alloy spline sleeve to make the spline pair to form a maintenance-free structure; splines and the outer circle of the aluminum alloy spline sleeve are provided with nylon coating layers, and the thickness of each nylon coating layer is 0.2-0.4 mm. By using the maintenance-free structure, the service life is prolonged, maintenance is not needed, and the cost is saved. Through the arrangement of the nylon coating layers, the transmission shaft has a self-lubricating system, and a better scheme is made for maintenance-free.

Description

technical field [0001] The invention relates to a transmission shaft in auto parts, in particular to a novel aluminum alloy transmission shaft. Background technique [0002] At present, the main parts of commercial vehicle drive shafts are made of 45 or 45Cr material, which is relatively heavy. As the requirements for lightweight vehicles become higher and higher, new materials need to be used to achieve lightweight. Aluminum alloy materials have low density and high strength. A good choice, so the prospect of aluminum alloy drive shaft is very bright. [0003] Application number 201420852655.7, application date 2014.12.29 The present invention relates to an aluminum alloy transmission shaft, including a sliding fork, a flange fork, two symmetrical universal joints and a welding fork. The welding fork is formed by forging an aluminum rod. The two welded forks are respectively connected with two universal joints, one of which is connected with the sliding fork which is conne...

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Problems solved by technology

[0004] Although the above-mentioned patent solves the problem of weight, the shaft tube is an integral structure, and the problem of serial movement is solved by sliding the fork. When the car is running, the shaft tube will generate stress and torsion, which is easy to cause damage to the transmission shaft, so it has the advantages of defect

[0005] Also, the current spline pair is a maintenance-free structure, and the maintenance-free structure needs to be able to meet the service life of the car.

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