Small Rear-Wheel Drive Mobile Robot Platform

The mobile robot platform serves as the core foundation platform and mobile carrier for mobile robots, primarily composed of a drive system, steering system, transmission system, and sensor system, enabling functions such as mobility, positioning and navigation, and obstacle avoidance. The rear-wheel drive robot chassis is a mobile robot base platform that uses the rear wheels as the active drive wheels and the front wheels as the passive support wheels. It is mainly suitable for dry, flat indoor environments, such as factory workshops, warehouses, and educational laboratories with cement or epoxy floors.

Parameter Table

Type		Small rear-wheel drive robot platform
● Standard configuration ○ Optional configuration - Not available
Chassis Specifications	Energy type	Pure electric (lithium iron phosphate battery)
	LengthWidthHeight(mm)	2030970610
	Minimum ground clearance(mm)	110
	Minimum turning radius(m)	2.5
	Maximum fording depth(mm)	90
	Maximum obstacle clearance height(mm)	100
	Maximum climbing angle(%)	20
	Maximum speed(km/h)	20
	Curb weight(kg)	280
	Maximum payload(kg)	500
Battery and Charging	Battery capacity (kWh)	2.5
	Range on empty (km)	60
	Slow charging time (hours)	2
Wireless Drive Parameters	Drive type	Rear-wheel drive (RWD)
	Motor rated/peak power (kW)	2.5/5
	Motor rated/peak torque (Nm)	11.5/45
Smart Hardware Features	OTA remote updates	●
	Backend data monitoring system	●
	Remote start/stop	●
	Tire pressure monitoring	－
	Four-wheel speed detection	－
	Hill start assist/hill descent control	●
	Low speed alert	－
	Emergency stop button	●
	Independent front/rear touch bar emergency stop	●
	Remote control	●

1. Robot mobility performance (speed, accuracy, obstacle crossing ability, terrain adaptability, etc.).

Core performance determinants: motors (drive wheel hub motors), wheels, reducers, drive wheels, driven wheels/universal wheels, motor drivers.

2. Sensors required for autonomous mobility:

Odometer: Estimates distance and direction of movement by measuring wheel rotation via an encoder (basic localization).

IMU: Measures the robot's acceleration, angular velocity, and attitude (pitch, roll, yaw) for attitude stabilization and auxiliary localization.

Basic obstacle avoidance sensors, Such as ultrasonic, infrared, or simple LiDAR, are used to prevent collisions.

3. Power and communication interfaces:

Battery compartment: Supplies power to the entire robot system.

Main control board interface: Provides physical interfaces (such as serial ports, CAN bus, Ethernet, USB) and electrical interfaces (power supply, signals) for connecting to the main controller.

Expansion interface: Typically reserved for connecting additional sensors required by upper-level applications (cameras, high-precision lidar, robotic arm controllers, etc.).

4. Chassis motion controller: Receives motion commands from the upper-level main controller, combines feedback from odometers, IMUs, and other sensors, precisely controls the speed and direction of each motor to achieve motion, and performs closed-loop control (ensuring actual motion aligns with commands).

Rear-wheel drive smart robot chassis with Ackermann steering mechanism (i.e., rear-wheel drive with front wheels responsible for steering) is primarily suited for outdoor or large indoor environments where speed, stability, and straight-line driving efficiency are critical, and the operating environment is relatively open with smooth surfaces.

Campuses, industrial parks, factory areas, airports, and external areas of large logistics centers: These locations typically feature paved surfaces similar to urban roads (asphalt, concrete), with relatively open spaces, long paths, and numerous straight sections, requiring robots to operate stably at medium to high speeds.

Large warehouses (high-bay warehouses, flat warehouses with sufficiently wide aisles), large manufacturing workshops, exhibition centers, and the interior of large airport terminals: These indoor environments, though enclosed, have sufficiently wide aisles (typically far wider than the robot's width and turning radius) and long paths.

Features	Ackermann steering chassis	Differential steering chassis (such as two-wheel differential)
Steering method	Front-wheel steering + rear-wheel drive (or four-wheel drive)	Left and right wheel differential drive (fixed front wheels or universal wheels)
Minimum turning radius	Large (limited by wheelbase, usually > vehicle length)	Extremely small (can rotate in place, radius ≈ 0)
High-speed stability	Extremely high (compliant with vehicle dynamics, not prone to skidding)	Low speed stability
Applicable scenarios	Outdoor roads, parks, highways (>1m/s)	Indoor, narrow spaces (warehouses, homes)
Control complexity	High (requires calculation of steering angle + speed coordination)	Low (only controls left and right wheel speed)
Typical applications	Autonomous test vehicles, unmanned delivery vehicles, patrol vehicles	Sweeping robots, AGVs, service robots

Key factors to consider when selecting a smart robot chassis

Application scenario and terrain: Indoor flat ground? Outdoor grass/gravel? Do you need to overcome obstacles? (Decide between wheeled/tracked)

Load capacity: How much weight does the upper equipment need to carry?

Mobility requirements: Speed, positioning accuracy, steering flexibility (differential/omnidirectional), and battery life.

Cost and reliability: What is your budget? How high are your requirements for stability and durability?