Exploring the world of robot chassis, from mini educational platforms to heavy-duty industrial behemoths.
In modern robotics, the chassis serves as the core foundation of mobile robots, determining their mobility, environmental adaptability, and overall performance. Whether it’s a firefighting robot performing dangerous tasks or a service robot in daily life, an excellent chassis design is key to success.
Robot Chassis: The “Legs” of Mobile Robots
A Robot Chassis is the core mechanical structure at the bottom of a robot used for movement and support. It includes the mobility mechanism, drive units, suspension systems, and related control circuits. Just as humans need legs to move, robots require a chassis to achieve their motion functions.
Modern intelligent robot chassis not only provide basic mobility but also integrate important functions such as positioning and navigation (SLAM), obstacle avoidance and safety, and load-bearing and support.
Main Robot Chassis Types and Their Characteristics
1. Tracked Robot Chassis
Tracked chassis utilize a continuous track system around wheels for movement, similar to tanks or excavators. These chassis are known for their superior terrain adaptability and powerful traction.
Typical Applications: Firefighting, rescue and explosive ordnance disposal, field exploration, and inspection in complex terrains.
Technical Features: Often employ Christie suspension systems for improved shock absorption, high-torque brushed DC motors, and rubber tracks embedded with materials like Kevlar or steel wires for enhanced durability. Protection ratings can reach IP54 or higher, adapting to harsh environments.
Representative Product: The KOMODO-02 tracked robot chassis uses stainless steel 304/alloy steel plates, with a load capacity of 100kg, operating speeds of 0-6 km/h, gradeability of 30 degrees, and the ability to overcome obstacles up to 150mm high.
2. Wheeled Chassis
Wheeled chassis rely on wheels for movement and are the most common type of robot mobility. They can be further classified based on the number and arrangement of wheels.
Subtypes:
- Differential Drive (Two-Wheeled): Simple structure, low cost, common in education and small service robots.
- Four-Wheel Drive: Good stability and strong load capacity.
- Ackermann Steering: Similar to cars, with front-wheel steering and rear-wheel drive, suitable for high-speed scenarios.
- Omnidirectional Movement: Uses Mecanum wheels or omni-wheels to enable lateral movement and in-place rotation.
Typical Applications: Indoor service robots, AGVs, vacuum cleaning robots, scientific research and education platforms.
Technical Features: Often use aluminum alloy integrally molded chassis, driven by DC servo motors, support interfaces like CAN bus and RS232, and provide rich development interfaces and sample code.
Representative Product: The Compass C2 four-wheel differential platform uses industrial-grade aluminum alloy integral molding, has a load capacity of 30kg, a movement speed of 1.2m/s, and a battery life of about 8 hours.
3. Heavy-Duty Chassis
Heavy-duty chassis are designed specifically for carrying extremely heavy loads, utilizing high-rigidity materials and reinforced structures.
Typical Applications: Automotive manufacturing, engineering machinery, steel metallurgy, heavy equipment handling.
Technical Features: Employ high-strength materials like cast iron bases and carbon fiber arms, equipped with high-torque reduction motors and intelligent control systems for precise motion control.
Representative Product: Kawasaki’s MXP series ultra-large universal robot, with a load capacity of up to 360kg, a maximum motion radius of 3600mm, and a repeat positioning accuracy of ±0.1mm.
4. Mini Chassis
Mini chassis feature miniaturized and lightweight designs, suitable for space-constrained scenarios.
Typical Applications: Education and research, scientific experiments, small-scale inspection, indoor navigation.
Technical Features: Use aluminum alloy structures to ensure lightness and strength, are compatible with open-source controllers like Arduino, and allow for easy addition of various sensors for functional expansion.
Representative Product: The FEETECH 2WD mini robot mobile platform, measuring only 170×100×60mm, weighing 138g, with an operating voltage of 4.5-6V, designed specifically for students and Arduino enthusiasts.
Chassis Type Comparison Table
The table below summarizes the characteristics and application scenarios of the main types of robot chassis:
| Chassis Type | Main Characteristics | Typical Application Scenarios | Advantages | Disadvantages |
|---|---|---|---|---|
| Tracked | Movement via continuous tracks encircling wheels, high traction | Complex terrains, heavy-duty applications | Excellent terrain adaptability, strong off-road performance, less prone to slipping | Relatively lower movement speed, higher energy consumption, more noise |
| Wheeled | Movement via wheels, various drive modes available | Indoor, flat surfaces, industrial settings | Faster speed, relatively simple control, higher energy efficiency | Poor adaptability to rugged and uneven terrain |
| Heavy-Duty | High-rigidity materials, reinforced structure design | Heavy industry, large load transportation | Extremely strong load capacity, stable operation, high precision | High cost, large size, high power consumption |
| Mini | Miniaturized, lightweight design | Education, research, small applications | Low cost, easy to develop, high flexibility | Limited load capacity, short battery life |
Overview of Global Major Manufacturers
1. Chinese Manufacturers
Chengdu Hangfa Robot Co., Ltd.: Focuses on the R&D and production of omnidirectional wheels and robot platforms. Representative products include the Compass series four-wheel differential platforms and three-wheel omnidirectional platforms.
Shandong Guoxing Intelligent Technology Co., Ltd.: A National Specialized, Refined, Unique, and New (SRUN) “Little Giant” enterprise, specializing in the R&D and manufacturing of special robots. Products include special robot chassis for firefighting, coal mining, petroleum, and petrochemical industries.
Shandong Hongwei Machinery Equipment Co., Ltd.: Specializes in producing various tracked chassis for applications like firefighting and drainage pipeline special environments.
NorthValley Robotics: Specializes in making all kinds of robot chassis, like Universal Tracked Robot Mobile Chassis, Low-speed Differential Robot Chassis and so on.
2. International Manufacturers
Kawasaki Heavy Industries (Kawasaki): A renowned Japanese industrial robot manufacturer. Its heavy-duty robot products are widely used in automotive manufacturing and heavy industry.
Aimipaer (Fighter Tracks): A manufacturer specializing in all-terrain track systems and tracked chassis for various special vehicles and robots.
3. Specialized Manufacturers
Taian Shuobao Intelligent Technology: Offers various robot chassis (tracked, wheeled, 4WD 4-steer, 4WD differential, Ackermann) and unmanned vehicle chassis and related components.
FEETECH: Focuses on mini and educational robot chassis kits. Products are compatible with Arduino controllers, suitable for students and educational purposes.
Songling Robot (AgileX Robotics): A leading global mobile robot chassis manufacturer and solution provider. Offers a full matrix of multi-modal wheeled and tracked mobile chassis covering various industry scenarios, widely used in education, logistics, inspection, and more. Products like Scout, Hunter, and Bunker series cater to different needs.
Bohhom (Boschung Robot): Specializes in positioning and navigation technology. Their “Boxiang Song” smart mobile chassis is a wheeled chassis known for being faster, more stable, and having low noise, making it suitable for service robot development.
PIX Moving: A modular smart car development company based on skateboard chassis. Its core product is an autonomous driving super chassis, customizable in size for different applications.
Ecovacs Robotics: One of the world’s earliest service robot R&D and manufacturers. Its commercial robotics business focuses on “AI+ service robot” products for the public domain, with self-developed wheeled robot chassis.
Yushu Technology: Focuses on the R&D and industrialization of universal line-controlled chassis for unmanned driving. Has developed small and medium-sized universal line-controlled chassis for low-speed scenarios like delivery, retail, and security.
Easy-Auto (Yika Zhiche): An IDV smart digital mobility platform technology company. Focuses on core “skateboard chassis” technologies like “full line control + true intelligence + integrated casting”. Products are commercially used in low-speed fields like last-mile logistics, security, patrol, and cleaning.
Conclusion
As the fundamental platform for mobile robots, the technological development of robot chassis directly drives the progress of the entire robotics industry. From tracked to wheeled, from heavy-duty to mini, different types of chassis meet the needs of various application scenarios. With the continuous development of materials science, control technology, and artificial intelligence, robot chassis will become more intelligent, efficient, and adaptable to complex environments.
Selecting the appropriate robot chassis is a critical decision in robot system design, requiring comprehensive consideration of application requirements, environmental conditions, and technical parameters. Numerous manufacturers worldwide offer a rich variety of product choices, from education and research to industrial applications, from indoor services to field exploration—suitable robot chassis solutions can be found for almost every field.
As technology continues to advance, robot chassis will keep developing towards smarter, more flexible, and more efficient directions, laying a solid foundation for the widespread application of robot technology.