Driving China Hualing Heavy-Duty Drive Axle Has Withstood the Severe Test

The unique transportation environment in China is a severe test for the heavy truck industry in China. The worst transportation conditions are mines, coal mines, and earthwork transportation. Not only is the road conditions extremely poor, but the phenomenon of overloading is also extremely common. In these worst conditions, Unloading plays a difficult task. The user is most concerned about the dump truck load capacity, which puts higher requirements on the performance of the vehicle axle to meet the performance of a serious overload, such as bearing capacity, output torque, safety and reliability.

However, in the development process of the domestic axle industry, except for a few brands, most of them cannot meet the transportation requirements under such harsh conditions. Even if the requirements of the transportation conditions are met, it is difficult to meet the service requirements of the users. Wheel hub rupture is a common phenomenon. The lack of timely and incomplete service is also quite common. It not only gravely confuses users, but it also makes it difficult for the Chinese auto industry and the Chinese axle and parts industry. People can't help but ask about the Chinese axle system. what happened?

From the course of development over the years, the domestic axle industry generally has the following characteristics:

(1) There is still a big gap between the quality of domestic commercial vehicle axles and the international level, and there are problems such as oil leakage, gear noise, early failures, and low brake quality;

(2) Users must bear high compensation for serious overloading;

(3) Vicious market competition produces "strengthened products" with a thicker axle and thicker axles;

(4) Nearly 60% of heavy-duty trucks are equipped with wheel-side deceleration bridges, which have complex structures, low efficiency, and high fuel consumption. However, the newly introduced 485, 498 single-stage deceleration bridges are not yet stable, and the cost is high.

At present, the environment of dump trucks in China has not changed fundamentally, and users’ demands for dump trucks and axles are getting higher and higher. The development trend of the future axle industry is represented by the high-end brands in China. In July, the heavy truck bridge project team was formally established. After two years of digestion and absorption of advanced technologies at home and abroad, it began to independently develop superior performances such as high bearing capacity, wide speed ratio, high reliability, high passability, and high safety. The heavy-duty drive axle series suitable for China's use of the environment has not only enhanced the intrinsic quality and market competitiveness of Hualing Heavy Trucks, but also brought good news to China's heavy-duty drive axle industry and heavy-duty truck users.

Hualing heavy-duty drive axle series is divided into two categories, namely single-stage speed reduction bridge and double-level reduction bridge with wheel side. The single-stage deceleration bridge is divided into the first series of single-stage deceleration bridges, that is, the HLD1/E1 series drive axles, that is, the 457 series drive axles are 13-ton single-stage deceleration axles; the second series single-stage deceleration axles are the HLD2/E2 series. The drive axle, that is, the 153 series drive axle, is a 11-ton single-stage deceleration drive axle; there are also twin drive axles under development in the HLD3/E3 series, the SCA series drive axle. The two-stage deceleration bridge with wheel side is divided into the first series of wheel-side deceleration bridge, that is, the HLF1/G1 series drive axle, that is, the STR series double-drive axle, which is a 13-ton pulley-side deceleration drive axle; the second series of pulleys The side deceleration bridge is the HLF2/G2 series drive axle, that is, the CC118 series double drive axle, which is a 13-ton pulley-side deceleration drive axle. The Valin HLF2/G2 series drive axles have now completed the test installation of two sets of double bridges. The on-line running-in test has basically normal indexes and good results. Five sets of assembly assemblies have been completed, and the next step is to carry out a full bridge reliability test. , And small batch trial production. It is possible to stereotype and form mass production during the year.

The material of the drive axle housing must have good comprehensive mechanical performance and good cold and hot processing technology. Judging from the different divisions of the axle shell material and manufacturing process, the Hualing drive axle is further divided into cast steel bridges, expansion bridges and punched and welded bridges, that is, the cast steel axle housing is formed by a casting process; the punched and welded axle housing is punched by sheet metal. After forming, it is welded and expanded. The bridge shell is made by drawing process.

At present, Valin has formed a complete bridge system and has completed the development of 80 products, including 8 kinds of front axles, 72 kinds of middle and rear axles, and preliminarily establishing a front axle that meets the requirements of different regions and different market characteristics. Middle and rear axle product systems and axle support systems. The production technology of the axle has been improved, the workshop production has been standardized, and a large number of innovative designs have been carried out during process development and tooling development, which has improved production efficiency and product quality. In 2008, a total of 11,263 sets of front axle products were completed, with a total of 3,670 drive axles.

The Hualing Axle was officially put on the market in the second half of 2008. From the perspective of the market, users are very satisfied. Combining with market demand, Hualing axles are designed and innovated from axle housing, braking system and axles, which makes Hualing heavy-duty drive axles have the following features:

High load-bearing capacity: It has the domestic top-level wheel axle deceleration bridge technology, and the axle shell adopts the integral type rear cover casting technology, so that the bearing capacity of a single drive axle can reach 13 tons.

High-pass performance: As a result of the wheel-side deceleration mechanism, the central main deceleration mechanism is greatly reduced, thereby increasing the ground clearance; according to the vehicle system matching, optional 11.00-20, 11.00R20; 12.00-20, 12.00R20; 14.00-20 and other tires. Make the vehicle have a high passability.

High safety performance: The brake adopts non-asbestos friction plates, which is safe and environmentally friendly. Optional ABS anti-lock device and automatic clearance adjustment arm to ensure driving safety.

Wide series speed ratio: Hualing series drive axle adopts the secondary deceleration mechanism of central main deceleration and wheel side planetary gear deceleration to form a wide speed ratio (4.42, 4.80, 4.875, 5.73, 5.833, 5.921, 6.72, etc.) for the whole vehicle Match; select the appropriate speed ratio to ensure the adaptability of heavy-duty vehicles in all kinds of road conditions.

High-reliability energy: Optimized active and passive gear design, manufacturing process, precision forging of differential gears, improving the service life of key components; wheel bearings using high-quality tapered roller bearings, wear-resistant, heat-resistant, can carry large loads And alternating load to increase its service life; brake friction lining is variable cross-section, and has a large braking contact area with the brake drum, improving the brake performance of the whole vehicle and the service life of the friction lining; optimizing the structure of the half axle and increasing the output torque To increase service life. Both oil seals and sealing aids use high quality products at home and abroad, which improves the sealing performance of the axle.

Valin heavy-duty drive axle is not only technically mature, it has passed the severe test of the market, and it also relies on Valin's 110-style door-to-door service to relieve the user's worries and meet the user's fast and timely service requirements for the axle. . With the rapid increase in market demand, the completion and commissioning of the axle plant of the Hualing Company will provide vehicles with cost-effective products, increase the overall competitiveness of vehicle products, and create tremendous economic and social benefits.