With the overall promotion of domestic over-limitation and toll-by-weight regulations, in order to retain users or attract new customers, industry heavy trucks have begun to “lose weight” and set off a new round of heavy-duty market competition. On behalf of Valin's high-end heavy trucks, Xing Kaima has made significant progress in its lightweight work in recent years. At the company's marketing conference on February 2nd, Chairman Liu Hanru stated that this year it is necessary to intensify efforts to launch a brand-new star Kay built for users. Horse lightweight products.

As early as three years ago, Valin Motors had already determined the company's strategic direction, in particular, increased the company's technological innovation and scientific research investment, vigorously promoted the strategy of corporate science and technology, and active and domestic and foreign well-known companies, well-known universities and scientific research The cooperation of the institute creates a core competitive product that can stand in the industry. Under the guidance of such an approach, the strategic product of Kailing Co., Ltd. was launched. According to the market demand, Xing Kaima's lightweight work has also achieved good “slimming results” in continuous improvement.

Do "subtraction" to reduce weight

The lightweighting of heavy trucks is not a simple task of reducing material consumption. Such lightweighting is only a matter of cutting corners. Liu Wei, head of the vehicle model division of Valin Technology Center, introduced that the lightweighting of Xing Kaima is under the conditions of ensuring vehicle performance and not reducing the carrying capacity of vehicles. The realization method is to optimize the vehicle design structure and the application of new materials and technologies. Specifically, Star Kemah's weight reduction work is mainly carried out from the frame, axle, suspension system, gearbox and tires.

Liu Wei told the author that the main light weight model of Xing Kaima is a 6*4 high-top tractor with a wheelbase of 3200+1350. After its improvement, its weight has been successfully reduced to below 8.7 tons. The specific weight loss situation is as follows:

Lightweight Xing Kai Ma frame is changed from 8+8mm double beam to 10mm single beam, single frame is lower than the double frame weight 85kg;

Suspension system is optimized, replacing the traditional spring structure of the first 9 and the rear 12 with the first four rear four small springs, the use of less leaf springs to reduce the weight of 114kg; at the same time, lightweight type 140 balance shaft , Than the usual state of the 130-C balance shaft weight 90kg;

Adopt aluminum alloy shell gearbox, reduce the weight 100kg than ordinary gearbox;

The 460-reducing heavy-duty axle developed by Hualing Co., Ltd. replaces the ordinary Steyr Bridge to reduce its own weight by 150kg;

If the user chooses to install a rubber suspension system or an air suspension system, the vehicle can also weigh 400kg. Star Kema's lightweight tires include wire tires, inclined rubber tires, and vacuum-free tires. Selecting different tires will reduce their own weight.

Doing "addition" to promote new materials and new technologies

Star Kema Lightweight Products follows the consistently high quality features of Valin Automotive. In the design process, not only do we need to do a subtraction in lightening work, but we must also do a good job of “addition”. That is the increased use of new materials and technologies, such as aluminum gearboxes, rubber suspension systems, air suspension systems, and composites. The use of materials, high-strength steel frames, etc., to achieve economical and reliability, safety and bearing the unity.

The frame of the Star Kema lightweight model adopts the WL650 high-strength single-layer frame steel plate to reduce the weight of the frame while also ensuring the carrying capacity of the vehicle. Axle adopts 460 weight reduction developed by Hualing itself. It is understood that the bridge shell is made of high-strength steel plate welding, and the high-strength steel plate welding structure is used for the suspension connection with the chassis. The weight is light and the strength is good. The main reducer of the bridge adopts an integral main reducer design with compact structure and high transmission efficiency, and the transmission torque is increased by 11% compared with the traditional 457 drive axle, but the weight is reduced by 14%; the brake adopts a crown drum structure and the brake shoe is Made of high-strength plate welding, the brake friction disc structure is eccentric and uneven thickness design, which not only reduces the weight, but also increases the braking force. In addition, the new 460 bridge brake friction disc adopts world-class German TMD, Japan TBK and other manufacturers products, Asbestos-free, environmentally safe, and life expectancy is more than three times that of ordinary friction plates.

It is worth mentioning that the use of rubber suspension system, in addition to its light weight, the use of rubber springs as a bearing, through a unique design, so that the rigidity of the rubber spring is variable, the rubber spring automatically adjusts the working status according to the bearing weight and road conditions, giving The vehicle provides a safe, controlled soft ride. The rubber suspension has the characteristic of variable rigidity, which can provide good comfort for the vehicle both in the no-load state of the vehicle and in the full-load state, minimize the vibration caused by the uneven road surface, reduce the fatigue of the driver, and protect the vehicle. The integrity of components and goods improves the life of vehicle components. Its wide range of applications, tractors, trucks, special vehicles such as cement mixers, tankers or garbage trucks.

The optional suspension system also includes an air suspension system. The air suspension system can automatically adjust the load capacity and low natural frequency of change, so that when the vehicle is driving, it can not only improve the ride comfort of the driver, but also to the road. Play a protective role.