In the environment of accelerating population aging trend and rising labor cost, it is urgent to speed up the speed of “machine replacement”. Driven by the wave of intelligence, the commercial robot market continues to heat up and give birth to the sub category of robot chassis, and the robot chassis with navigation technology is one of the necessary hardware for mobile robots.

The robot chassis carries the basic functions of the robot itself, such as positioning, navigation and obstacle avoidance, and can help the robot realize intelligent walking. What are the main chassis structures in mobile robots? It is understood that the mobile robot chassis on the market mainly has two structures: crawler and wheeled robot chassis.

Crawler robot chassis is mainly used for special robots. It has the advantages of large traction, not easy to slip and good off-road performance. It can be applied to field and urban environments. It can move on all kinds of complex ground, such as sand and mud, but the speed is relatively low and the movement noise is large. The wheeled robot chassis is mainly used in service robots. For example, the dining robot in restaurants and the shopping guide robot in shopping malls mostly use the wheeled robot chassis structure. The wheeled robot chassis has the advantages of fast motion speed and low motion noise. It is also the chassis used more by service robot enterprises at present.

Wheeled robot chassis is mainly divided into front wheel steering, rear wheel differential drive, two wheel drive + universal wheel and four-wheel drive.

1. The wheeled robot chassis with front wheel steering + rear wheel drive and front wheel steering + rear wheel drive mainly adopts the forms of electric cylinder, worm gear and worm to realize the front wheel steering. As long as a motor and differential reducer are added to the rear wheel, the movement requirements of the robot can be completed. It has the advantages and disadvantages of low cost and simple control, but the disadvantage is that the turning radius is large and the use is relatively inflexible.

2. Two wheel drive + universal wheel, two wheel drive + universal wheel can arrange the universal wheel and driving wheel in different forms according to the requirements of the robot for the design center of gravity and turning radius. The structure and motor control are also relatively simple, the robot has strong flexibility, and the algorithm is easy to control.

3. Four wheel drive. Four wheel drive has strong ability in straight-line walking and large driving force, but the cost is too high and the motor control is complex. In order to prevent the robot from slipping, it needs more detailed structural design.

In terms of flexibility, the wheeled robot chassis with two wheel drive and universal wheel has more advantages. The Zeus robot chassis of Silan technology adopts the design of this structure. At the same time, Silan technology has also developed a shock-absorbing universal mobile robot chassis. The driving wheels in the chassis adopt a drag independent suspension system with shock absorption, and the shock-absorbing system is designed with a segmented structure to ensure that all wheels of the mobile chassis contact the ground coplanar under the condition of self weight, It also ensures the effect that the chassis still walks stably under heavy load, and solves the problems existing in the existing market, such as non coplanar contact ground of multiple gear trains, easy sliding over concave convex ground, walking shaking and so on.

At present, the service robot based on Silan technology mobile robot chassis has been widely used in shopping malls, restaurants, banks, supermarkets and other service places. At the same time, it also has multiple functions such as independent positioning and navigation, virtual wall, virtual track, cloud remote management and automatic recharge, and provides rich software and hardware interfaces to enable users to quickly Conveniently build robot applications that meet their business needs.

With the strong market demand for service robots, there are more and more enterprises directly developing the upper layer based on robot chassis applications. The emergence of mobile robot chassis not only saves R & D time and cost, but also seizes the market opportunity of service robots.

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