How to promote the development of the gear industry

The design and components of the transmission that have been introduced domestically should be vigorously promoted and adopted. Currently, a key issue in improving the level of domestic hydraulic mechanical transmission devices is to accelerate the process of joint mergers and acquisitions, introduce better technology, and establish a competitive ability with world level technology in China as soon as possible. Only in this way can the series and generalization of hydraulic mechanical products be achieved, and the series of products have strong vitality.

Promoting the application of self-locking anti-skid differentials and wet brakes in tire type construction machinery drive axles is one of the ways to improve the technical level of China's construction machinery drive axle products. The self-locking anti-skid differential can automatically distribute torque unevenly between the left and right wheels to fully utilize the vehicle's traction, while significantly improving the vehicle's off-road performance and economy; Wet brakes have high durability and reliability, with a service life more than 1.5 times longer than dry caliper brakes, and a large braking capacity with good braking performance. It has been widely adopted in large and medium-sized tire type construction machinery abroad and should also be vigorously promoted. Single power flow steering clutches and brakes are commonly used in the rear axles of tracked construction machinery, resulting in only one turning radius of R=B for left and right steering of the vehicle, while the remaining turning radii are achieved through the slippage of friction elements. This not only causes serious power loss but also reduces the service life of friction elements. In order to improve steering performance and reduce power loss, China should accelerate the development of a power differential steering mechanism similar to the D8N tracked bulldozer from the American CAT company.