This is a driveshaft assembly (universal joint driveshaft) for the HOWO 8×4 heavy-duty truck (Sinotruk HOWO 8×4 model). It is a core component of the chassis transmission system, primarily used to connect the transmission (or transfer case) to the rear axle (or drive axle).

Detailed Analysis:

1. Product Positioning & Application

• Applicable Models: Specifically designed for the Sinotruk HOWO 8×4 (front four rear eight) heavy-duty truck, matching its drivetrain system (e.g., connection between the transmission output shaft and the rear axle input shaft) to ensure stable power transmission under heavy loads, rough roads, turning, and other operating conditions.

2. Appearance & Structural Features

Material:

• Shaft Tube: Typically made of high-strength steel tubing (e.g., 20CrMnTi, 45# steel), welded and quenched, offering high rigidity and torsional strength suitable for heavy-load torque transmission.

• Universal Joint Yoke: Usually made of cast steel (e.g., ZG310-570) or forged steel, processed through forging and machining to ensure strength and wear resistance.

• Cross Shaft / Needle Roller Bearing: The cross shaft is made of alloy steel (e.g., 20Cr), carburized and quenched; the needle roller bearings are made of bearing steel (e.g., GCr15), ensuring flexible rotation and wear resistance of the universal joint.

Structure:

• Universal Joints at Both Ends: Each end has a yoke connected via a cross shaft, forming a universal joint assembly that allows the driveshaft to swing within a certain angle.

• Intermediate Telescopic Shaft: The shaft tube contains an internal splined shaft (slip yoke) that can slide axially inside the tube to compensate for length changes during vehicle operation.

• Dust Cover: A rubber or leather dust cover is placed over the universal joint to prevent dust and mud ingress, protecting the internal needle roller bearings.

• Assembly Condition: The image shows a complete driveshaft assembly (including universal joints, shaft tube, and telescopic shaft). Some driveshafts may feature balance weights to reduce unbalanced vibration during high-speed rotation.

3. Technical Parameters & Compatibility

• Parameters such as driveshaft length, spline specifications, universal joint dimensions, and torque capacity must be strictly matched to the specific HOWO 8×4 model (e.g., T7H, M3000, X3000, etc.), engine power, and rear axle ratio to ensure reliable and safe power transmission.