A vehicle, a drive axle, and a half-shaft assembly

Abstract

The invention relates to a vehicle, a drive axle, and a half shaft assembly. The vehicle includes a drive axle, which includes the main input shaft and left and right half-shaft assemblies, each of which includes an upstream half-shaft and a downstream half-shaft, the opposite ends of which pass through the magnetic flow The transmission connection of the variable transmission structure, the magneto-rheological transmission structure includes a sealed chamber arranged between the upstream half shaft and the downstream half shaft, and a magnetorheological solution for transmitting torque between the upper and downstream half shafts is arranged in the sealed chamber. The rheological transmission structure also includes an electromagnetic device for changing the magnetic field environment of the magnetorheological solution. The magnetic field strength of the magnetorheological solution is controlled by the electromagnetic device, and then the damping of the magnetorheological solution is controlled to realize the torque disconnection and different degrees of coupling between the upper and lower half shafts, which can not only realize torque disconnection, but also Realize the differential function of the half shaft, so that the differential can be eliminated, effectively reducing the weight, volume and temperature rise of the drive axle during operation.

Description

technical field [0001] The invention relates to a vehicle, a drive axle, and a half shaft assembly. Background technique [0002] The driving system of a vehicle generally includes a driving device, a transmission system, and a drive axle, wherein the drive axle is located at the end of the vehicle drive system, and its structure is generally as follows: figure 1 As shown, it includes the final drive 1, the differential 2, the left half shaft 3, the right half shaft 4 and the drive axle housing. The system is transmitted to the main reducer, and further transmitted to the half shafts at both ends through the differential, and then transmitted to the wheel hub 5 through the half shafts to drive the whole vehicle to run. During this process, the main reducer changes the direction of torque transmission through a pair of bevel gear pairs. The speed ratio of the final reducer increases the torque of the driving device while reducing the speed to meet the needs of driving. [0...

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of the above-mentioned drive axle in actual use are: the drive axle cannot be cut off on the path of torque transmission, and this method will cause two types of problems: one is when the vehicle does not need power traction during driving. (For example, when the driving device is not required to output power when gliding), a large amount of energy is consumed due to the inability to cut off all the drag belts and ineffective linkages, resulting in an increase in the fuel consumption of the vehicle

The other type is due to the rigid connection of drive axle main reduction gear, differential, half shaft and other components in the direction of the torque transmission path, so that the impact excitation of the road surface is transmitted to the half shaft through the wheel, and then transmitted to the differential by the half shaft. On the reducer and the main reduction gear, the impact excitation that causes the uneven road surface acts on the meshing process of the main reduction gear, which will not only damage the main reduction gear, but also increase the meshing noise of the main reduction gear

[0004] Aiming at the shortcomings of the drive axle during use, an application publication number is CN101780766A, a Chinese patent titled a drive axle half shaft clutch discloses a drive axle structure, the working principle of which is connected between the gearbox and the engine flywheel. The installed clutches are consistent, that is, the half shaft clutch is installed on the half shaft of the drive axle, and the disconnection and combination of the drive axle half shaft are controlled by the disconnection and combination of the half shaft clutch. In the actual use of the drive axle, because the half shaft The clutch can only realize torque disconnection or transmission, and its function is relatively single. It still needs a differential to realize speed adjustment, which makes the structure of the entire drive axle more complicated, and the drive axle occupies a large space as a whole. The friction plate of the shaft clutch is also easy to wear and tear, and it is inconvenient to replace

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