At present, drum axles are widely used in trucks in China, that is, the so-called drum brakes. The new national standard gb7258-2017 technical conditions for safety of motor vehicles was officially implemented on January 1, 2018, It is clearly stipulated that "disc brakes shall be equipped for the front wheels of all special school buses and dangerous goods transport trucks, the front wheels of other buses with a length of more than 9m, as well as all wheels of dangerous goods transport semi-trailer and three axle fence type warehouse semi-trailer".

The introduction of new laws and regulations must be reasonable. It is estimated that it will be difficult for trailer owners to buy drum axles in the future. With the implementation of the new regulations, the state has officially announced that it is basically necessary to comprehensively promote disc brakes, so why do drivers want to buy drum axles instead of disc axles? Let's talk about why the footwall axle can't be fully popularized.

The release of gb7258-2017 has opened the curtain of trailer lightweight. Especially after the release of gb1589-2016, the total weight of 6-axle vehicle is limited to 49 tons, which is a full reduction of 6 tons compared with the previously calibrated 55 tons, which makes many manufacturers begin to upgrade the product lightweight, hoping to retain users.

The picture shows Darong rsccz series disc axle

The braking capacity of disc axle is much stronger than that of drum axle. Disc brake has many advantages, such as low heating, uniform heating, fast heat dissipation, sensitive braking and low use cost. It can be seen from the figure that the heat dissipation of disc axle is much better than that of drum axle.

The picture shows the brake disc of Darong rsccz series disc axle

The heat dissipation of the drum axle is not good, and a water spraying system needs to be installed to cool the brake pads. In severe cold areas, this is very dangerous, not only for themselves, but also for them. In severe cold areas, the water in the water tank may freeze and the water spraying system will fail, resulting in serious heat attenuation of drum brake and even brake failure.

If there is frost on the road, the water drenched by the trailer when braking will freeze on the road, causing a great hidden danger to their driving safety. In cold and freezing weather, traffic police are often on duty at the intersection to forcibly release the water in the trailer to reduce potential safety hazards.

Therefore, from the above points of view, the adoption of disc axle for trailer is the general trend. It can not only improve the braking performance, but also effectively reduce the incidence of accidents.