Abstract : A mobile robot with jumping ability was constructed. The robot moves using wheels on relatively flat terrain; when encountering obstacles or ditches, it can jump to expand its range of motion. The overall structure of the robot's mechanical system is introduced, the robot's body structure and take-off posture are given, and the robot's motion process is analyzed. Then, the working principles of key mechanisms such as the jumping mechanism, jumping parameter adjustment mechanism, and tipping and overturning mechanism are analyzed in detail, and mechanism design schemes are given. Finally, some key parameters of the robot are selected according to the overall design requirements. Keywords : mobile robot; mechanism design; jumping mechanism 1 Introduction Wheeled or tracked mobile robots have simple mechanisms and consume little energy during movement, but they have difficulty crossing obstacles that exceed their height limits. As the size of the robot decreases, the limiting effect of terrain on movement becomes increasingly significant. Walking or crawling robots have a slightly stronger ability to traverse obstacles, but their mechanisms are complex, with many degrees of freedom, joints, and drive components, which limits their practical applications. Jumping robots can leap over obstacles or ditches several times their own height and have strong adaptability to terrain. However, jumping motion first requires overcoming the influence of gravity, and the dynamic equations during the take-off and ground contact phases are complex, making balance difficult to control. In the development of robots, integrating multiple motion modes into a single robot is a major way to expand its range of motion and improve its adaptability. Yamanaka in Japan combined rolling and jumping motion to create a rolling spherical robot capable of jumping. Birch et al.'s mechanical cricket possesses both crawling and jumping motion modes. This paper constructs a wheeled mobile robot with jumping capabilities, presenting the design and working principle analysis of its key mechanisms. This robot effectively combines wheeled and jumping motions. On flat terrain, the robot uses wheeled movement, saving energy; when encountering obstacles or ditches, it can jump, thus expanding its range of motion. All posture adjustments are performed on the ground, avoiding complex dynamic equation analysis. [b][align=center]For more details, please click: Design and Implementation of a Jumping Mobile Robot[/align][/b]