With the popularity of online shopping, express delivery has become an indispensable thing around us. It is more common for the elderly to live in high-rise buildings without elevators. The process of getting express delivery upstairs and downstairs undoubtedly adds trouble and invisible danger. And since the outbreak occurred many times the community cluster infection, community residents in the process of going to the courier receiving point to send the courier there is a risk of infection. Taking this new coronary pneumonia epidemic as a reference object, our team designed a obstacle-crossing robot with a certain weight-bearing capacity to address the main problems of community express transportation. At the same time, the WeChat applet at the top of the development line is matched with it. This community express delivery robot has good obstacle crossing and load-bearing capacity, and can be applied to the community to climb stairs with load to transport goods. Residents only need to place an order through WeChat applet at home, and the robot can automatically plan the path and deliver the express to the door, thus having a broad market prospect.

The main structure of the intelligent community express delivery robot is a new type of passive wheel-leg mobile mechanical structure developed by our team. The structure is six-wheel drive, the front wheel can swing up and down to facilitate obstacle crossing; the rear wheel provides support when crossing obstacles; the four driving wheels on the abdomen are arranged in parallel, which can keep the car's own balance when crossing obstacles. The community express robot has excellent obstacle crossing performance, which overcomes the various shortcomings of the traditional obstacle crossing robot, and the performance meets the market demand. Compared with the traditional robot with obstacle crossing ability, the robot simplifies the body structure of the robot. At the same time, due to the use of passive terrain adaptation mechanism, the control system of the robot is simplified and the reliability of the robot is improved. The work has strong field adaptability and obstacle crossing ability, and can adapt to various complex terrains such as cement, grassland, sand and muddy roads. And it can climb steps with a height greater than twice the diameter of the wheel, and can turn to zero radius through complex slopes with a slope of about 50 degrees.