Drive shaft (drive shaft) A shaft that can transmit power among the drive shafts of a universal transmission device. In addition to the transmission power of the transmission shaft, the length of some transmission shafts can be extended and contracted to prevent movement interference when the distance between the two connected shafts changes.
During the driving of the car, the relative position of the transmission and the drive axle often changes. In order to avoid movement interference, the transmission shaft is connected with a sliding spline composed of a sliding fork and a spline shaft to adapt to the change of the length of the transmission shaft. In order to reduce wear and tear, grease nipple, oil seal, plug cap and dust cover for filling grease are also installed.
When the drive shaft rotates at high speed, the centrifugal force caused by uneven mass will cause the drive shaft to vibrate violently. Therefore, when the drive shaft and the universal joint are assembled, they must be dynamically balanced.
Mid-support (mid-support) When the drive shaft is too long, it needs to be disconnected in the middle, and they are supported on the frame (body) through the supporting device.
The intermediate support is installed on the frame beam or the underframe of the vehicle body, and it is required to have the function of compensating the installation error of the transmission shaft and adapting to the displacement caused by the engine movement and the deformation of the frame caused by the elastic suspension of the engine during driving. At the same time, the rubber elastic element has the functions of absorbing the vibration of the drive shaft, reducing noise and bearing radial force. The middle support is composed of rubber elastic elements, bearings, etc. Because the honeycomb rubber pad is elastic, it can compensate for installation errors and displacement caused by engine movement and frame deformation during driving. Some intermediate supports use double-row tapered roller bearings.
Intermediate support is required when the drive shaft is segmented. Usually the intermediate support is installed on the frame beam, which should be able to compensate for the installation error of the drive shaft in the axial and angular directions and the displacement caused by the engine movement or the deformation of the frame during the running of the vehicle.