For large-scale heavy-load transportation, efficiency and cost have always been the key issues. However, Suohe believes that what truly transcends the times lies in the underlying capabilities that are hidden behind the scenes.
Recently, Suoba officially announced its self-developed and self-produced core power system for electric heavy trucks - "Yongqing" electric drive axle.
With "Yong" as its name and "Qing" as its mission, it embodies Speedboat's ultimate pursuit of ultra-long lifespan, powerful load-bearing capacity and powerful driving force. Moreover, with the confidence of "full-stack self-innovation and independent production", it indicates that the core powertrain of electric heavy trucks is entering a new era of efficiency and reliability.
The essence of structure: Integrated molding, like the foundation of a mountain range
In heavy-duty transportation scenarios, the structural strength of the electric drive axle directly determines the vehicle's availability rate and safety. The reliability of "Yongqing" is first rooted in its integral cast axle housing.
Unlike traditional welding or bolted connection structures, "Yongqing" is made of high-grade ductile iron material in a single piece. There are no bolted connection points, eliminating the risk of fatigue fracture at the connection points and ensuring uniform stress distribution.
The test data confirmed this design: the maximum bearing capacity in the Z direction reached 16 tons. It passed the 50g acceleration impact test and the 1.85 million fatigue tests, and the B10 lifespan reached 1.2 million kilometers.
For the fleet, this means lower maintenance frequencies and longer service life - truly reliable, starting from the very foundation.
The Core of Power: Smooth Control, Cultivating Powerful Momentum
In the face of harsh conditions such as heavy-load starting, continuous climbing, and frequent vibrations, the "Yongqing" solution is a large-power, large-torque oil-water composite-cooled round-wire motor.
Unlike the common wire winding schemes in the industry, Suoba has chosen a round wire motor in combination with its exclusive oil-water mixed cooling technology.
This technical approach eliminates the complex laser welding process. It has a simple structure, fewer failure points, and reduces maintenance costs by 40%, while enhancing reliability in extreme conditions by 30%.
The power parameters are also impressive: an output of over 1000 N·m of torque, firmly establishing its position as a leading model in the domestic industry; equipped with a quasi-900V high-voltage platform, the motor does not overheat under the same working conditions, and the power reserve is always available.
The Wisdom of Transmission: Intelligent Circulation, Precisely Controlling Every Bit of Efficiency
"Yongqing" adopts time-sharing drive for the mid and rear axles, with two-stage transmission and two-speed gearbox, achieving a transmission efficiency of up to 95%.
At the lubrication and temperature control levels, a splash + active dual lubrication structure is adopted, combined with an intelligent temperature control system. In extremely cold environments, it can quickly establish oil pressure and reduce oil mixing losses.
The oil change interval is 500,000 kilometers. By adding 4 liters less of oil, it exceeds the industry standard level.
Furthermore, instead of using the traditional inter-axle differentials, we adopt electronic differential technology, which simplifies the mechanical structure and enhances the control flexibility.
The benefits of efficiency: Lightweight cost reduction, realizing true value
In the operation of electric heavy trucks, every kilogram of weight reduction and every kilowatt-hour of energy saving ultimately manifest in the profits of users.
"Yongqing" achieves structural simplification and lightweighting breakthroughs by eliminating the transmission shaft and the inter-shaft differential, and by integrating the bearing unit into the design.
The hub unit is maintenance-free for 3 years or 500,000 kilometers. The single axle is reduced by 20 kilograms, and the friction loss is decreased by 
40% - the range is directly increased and the operating cost is significantly reduced.
The actual operational data has verified that the operational energy consumption remains stable at 1 kilowatt-hour per kilometer.
High attendance rate, low energy consumption - "Yongqing" is enabling electric heavy trucks to shift from policy-driven to value-driven, becoming a truly "profit-making tool".
However, it should be noted that it takes time for a new product to go from its launch to being widely installed and undergo market validation. Whether the self-developed electric drive axle of Suopao can perform stably in more brands and different operating conditions still requires more actual operational data to support.
From the robustness of the integrated casting chassis to the stability of the oil-water composite cooling motor; from the precise control of 95% transmission efficiency to the 500,000-kilometer oil change cycle - behind every technical choice lies the profound understanding and ultimate implementation of "reliability" by Suoba.
All of this is based on a solid foundation of "true self-developed and self-produced". From the underlying technology to the entire production and manufacturing process, full control is maintained throughout the chain, ensuring that every product that rolls off the assembly line can withstand rigorous tests and deliver the guaranteed value of every kilometer to users.
