Self-Propelled Modular Transporter (SPMT) is a hydraulic heavy-duty transporter composed of modular units and Power Pack Units (PPU). It can be flexibly combined into configurations of various sizes and load capacities to meet the diverse requirements of different cargo transportation scenarios.Modules support flexible horizontal/vertical combinations, enabling synchronized hydraulic driving and lifting. Capable of heavy-load long-distance travel and continuous remote operation, it features high synchronization precision in driving and lifting.
With stable performance, flexible assembly, easy maintenance, and strengths in safety, efficiency, flexibility and intelligence, it is widely used for transporting and roll-loading ultra-large objects in shipbuilding & repair, offshore oil platforms, petrochemicals, bridge construction and other sectors.
The SPMT system mainly consists of two core components:
With its robust design, the SPMT is capable of transporting cargo with weights ranging from 50 tons to 30,000 tons. As a professional enterprise in the field of heavy-duty transportation, SHIYUN Group excels in the manufacturing of heavy-duty trailers and the provision of integrated heavy-transport solutions.
Our SYZ2430 model SPMT is available in 4-axle or 6-axle modular configurations, both integrating core components including a frame, steering system, hydraulic suspension system, hydraulic piping system, drive system, braking system, wheel system, and electrical control system. The frame of both modules is welded from Q690E high-strength steel plates with a triangular main beam structure for enhanced durability. Equipped with a rack and pinion cylinder-driven steering system, they offer a steering angle range of -100° to +130° for exceptional maneuverability. Their hydraulic suspension systems use cylinders to adjust frame height, providing a 700mm frame travel, while the hydraulic lifting system features a zone function that allows flexible division of the hydraulic suspension into 3 or 4 zones with easy configuration switching. The braking system is cylinder-controlled for reliable performance, with the 4-axle module’s drive system adopting a hydraulic motor combined with a lifting mechanism and the 6-axle module’s drive system utilizing a hydraulic motor paired with a reducer.
| Name | Module | |||
| Axle lines | 4 | 6 | ||
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| Drive axles | 2 | 4 | ||
| Brake axles | 4 | 6 | ||
| Length(mm) | 5600 | 8400 | ||
| Width(mm) | 2430 | 2430 | ||
| Height(mm) | 1500±350 | 1500±350 | ||
| Lowest height（mm） | 1150 | 1150 | ||
| Wheel base | 1400 | 1400 | ||
| Track width | 1450 | 1450 | ||
| Tare weight | 4.5Ton/axle line | 4.5Ton/axle line | ||
| Tire size | 355/65R15 | 355/65R15 | ||
| Rim size | 9.75-15 | 9.75-15 | ||
| Tare weight/axle line(Ton) | 4.5Ton/axle line | 4.5Ton/axle line | ||
| Tare weight(Ton) | 18 | 27 | ||
| Speed | V≦0.5KM/H | V≦4KM/H | V≦0.5KM/H | V≦4KM/H |
| Max Payload/axle line(Ton) | 44 | 34.5 | 44 | 34.5 |
| Rated load/axle line(Ton) | 39.5 | 30 | 39.5 | 30 |
| Max Payload including tare weight(Ton) | 176 | 138 | 264 | 207 |
| Rated load weight(Ton) | 158 | 120 | 237 | 180 |
The frame is welded from Q690E high-strength steel plates, and the main beam has a triangular structure.To achieve welding accuracy and minimize deformation, specialized welding fixtures are crafted.
The steering system adopts a rack-and-pinion cylinder design. Its hydraulic cylinder piston rod is engineered with a rack structure: hydraulic oil acts on the piston, driving the rack-structured piston rod to move smoothly. This rod meshes seamlessly with a gear, initiating gear rotation. Connected to the gear is the hydraulic suspension—responsible for supporting the axles and tires—with the gear’s rotation directly transmitted to the tires. This mechanism propels the vehicle across the ground while enabling precise and smooth turning maneuverability.
The hydraulic suspension system consists of key components including a rotating bracket, a lifting arm, and a lifting cylinder. This hydraulic cylinder boasts a 360mm stroke, a 146mm cylinder diameter, and a 140mm rod diameter. Crucially, the mechanism functions as a stroke amplifier: extending the hydraulic cylinder through its full 360mm stroke achieves a remarkable 700mm increase in the distance between the tire and the vehicle frame, delivering an amplification ratio of approximately 1.94.
4.Driving system
The braking system comprises key components including a brake bridge and brake cylinder. When the cylinder remains unpressurized, it defaults to the braking position. Braking disengages once the cylinder’s oil supply pressure exceeds 15MPa.
The Platform Unit (PPU) comprises key components including an engine, air filter, muffler, radiator, intercooler, oil cooler, variable displacement pump, fuel tank, hydraulic oil tank, and battery. It delivers reliable hydraulic power and electrical supply to the platform vehicle. The PPU is connected to the platform vehicle via an articulation joint and a tilting cylinder: the tilting cylinder’s push-pull action enables adjusting the PPU’s angle with the ground between 0° and 11°, while the engine’s power provides a maximum climbing capacity of 6%. The hydraulic modules on the platform vehicle can be operated manually or remotely from the PPU, facilitating precise lifting and lowering of cargo.
| Name | PPU |
| Engine and capacity | 330-390KW |
| Size（mm） | 4200*2310*1100 |
| Tare weight （Tons） | 6.3 |
| PPU Lifting angle | 11 degree |
| Hydraulic oil tank capacity (L) | 500L |
| Remote controller | Radio |
| Drive capacity | Max 40 axis lines |
The sophisticated steering technology of the SPMT allows precision-positioning of the heaviest of loads. The individual module transporters can be coupled in any combination, either mechanically or in open combinations. The steering technology guarantees the synchronized control of all module transporters integrated in the coupling mode. Electronic all-wheel steering makes the module transporters extremely maneuverable. This makes them suitable to transport almost any load and provides precision-positioning of ± 2 mm.
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