Car transmission shaft assembly

Abstract

The invention discloses a car transmission shaft assembly. The car transmission shaft assembly comprises a hollow shaft tube (5). The inner wall of the shaft tube is uneven. The front end of the shaft tube (5) is connected with a universal joint (1) through a front U-shaped fork (4). The rear end of the shaft tube (5) is connected with a rear axle main reduction end face flange (3) through a rear U-shaped fork (6). Rolled paper (7) is placed along the inner wall surface of the shaft tube (5) in a flat attaching mode. Due to the fact that the rolled paper is placed along the inner wall surface of the shaft tube in the flat attaching mode, when a car runs at high speed, high-speed airflow rapidly enters the shaft tube which rotates at high speed through the side face of the front U-shaped fork from a gap of the welding position, intense friction and impact are not generated between the airflow and the uneven inner wall of the shaft tube any more due to blocking and absorption of the rolled paper in the shaft tube, purr whine noise generated by the high-speed airflow can be greatly lowered, noise is low and can not interfere in listening of a driver to other sounds, and therefore the operation of the driver for normally driving the car can not be affected, and normal running of the car is guaranteed.

Description

Technical field [0001] The invention relates to an automobile chassis transmission system, in particular to an automobile transmission shaft assembly. Background technique [0002] As a key part of the transmission system, the drive shaft assembly is essential to the normal driving of the car. Such as figure 1 with figure 2 As shown, in the existing automobile transmission shaft assembly 2, the inner wall of the shaft tube 5 is uneven, the front end of the shaft tube 5 is welded to the universal joint 1 through the front U-shaped fork 4, and the rear end passes through the rear The U-shaped fork 6 is welded to the main reducing end face flange 3 of the rear axle. The technical problem of this kind of automobile drive shaft assembly is: the shaft tube 5 is welded to the universal joint 1 through the front U-shaped fork 4, and there are usually gaps in the welding place. When the car is running at high speed, the high-speed airflow will quickly escape from the welding place. The...

AI Technical Summary

Problems solved by technology

The technical problem of this kind of automobile transmission shaft assembly is: the shaft tube 5 is welded and connected with the universal joint 1 through the front U-shaped fork 4, and there are usually gaps in the welding place. The gap enters the high-speed rotating shaft tube 5 from the side of the front U-shaped fork 4, passes through the shaft tube 5, and then passes through the side of the rear U-shaped fork 6. Since the inner wall of the shaft tube 5 is uneven, the high-speed airflow enters the shaft quickly. After the pipe 5, there will be intense friction and impact with its uneven inner wall, resulting in a "whining" whistling noise, which seriously interferes with the driver's hearing of other sounds, and may affect the driver's normal driving of the car.

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