Technical parameters: The design of the torque axis conforms to the three principles set out below, and its design depends on the specific transmission structure in which it is located. (1) Flexible buffer The rational design of the elastic torque axis can reduce the system dynamic load to a certain extent when the transmission is exposed to external load, thereby increasing the operating reliability of the equipment and extending the service life of the equipment. (2) Overload protection When the cutting part is in the worst state of serious overload (for example, a cross-section bracket beam or roller gets stuck in a solid rock), the torque axis, although it can play a certain buffering role, exceeds the drive capacity due to the large dynamic load in the drive system. This will cause damage to the transmission elements. torque shaft compared to other drives. It has the characteristics of simplicity of manufacture, processing and ease of replacement. Therefore, it is often installed as the weakest link in the transmission to reduce losses caused by transmission damage in the worst conditions. (3) Power transmission The torque axis is also a power output shaft that cuts the motor and performs the function of transmitting torque between the cutting motor and the drive system. The torque axis material is made of 42CrMo forged steel. The torque axis analysis method: static analysis and fatigue analysis. The torque shaft unloading groove shape should be selected with a U-shaped cut. 5, the torque axis unload the groove surface roughness stability area of 0.4 - 4.8μm. 6. For the problem of torque axis non-breakability when overloading coal mining machine: the application of numerical modeling method for static analysis of the torque axis unloading groove depth, at the torque axis unloading groove depth of 10mm, can meet the requirements of coal mining machine overload protection. The optimized working reliability of the torque axis ensures safety for efficient production of coal machines. (Depending on the actual shooting) The service life of the torque: reach the level of similar foreign products. Performance characteristics: 1, the torque axis value reaches the torque value for similar imported components, fully plays the role of load protection. 2, added tooth end turning process to make the installation process more simple and convenient, improve the efficiency of coal mining. 3. After overloading, the section is leveled, easily replaced, the repair efficiency is increased. Scope of application: For long-haul integrated coal mining machines, continuous coal machines, anchor excavators, washing crushers, etc. D. (a full range of torque characteristics, more than 100 kinds of torque JOY Complex, JOY Line, EKF Complex, Santvik, domestic coal machinery, etc. are currently produced. The torque axes with different characteristics can be designed for different cutting conditions).