The rigid arm assisted manipulator, also known as a manipulator, balancing, balancing aid and manual mobile loader, is a new and innovative aid for labour saving when moving and mounting. By cleverly applying the principle of force balancing, the worker pushes and pulls the weights accordingly and can balance the moving position in space. The weights form a floating state as they rise or fall, with air to ensure zero working force (in practice, due to machining processes and design cost controls, working force is judged at less than 3 kg), and working force is influenced by the weight of the workpiece. Without skilled pointing operations, the worker pushes the weight by hand and the weight is placed exactly anywhere in the space.

　　Hard-arm power-assisted manipulators can perform a wide range of tasks such as moving, assembling, cutting, painting and many other applications. With increased automation in all industries, modern process plants are often equipped with assisted robotic arms to improve consumer efficiency and to complete difficult or high-risk tasks for the labourer.

　　Due to the complexity of the environment, uncertainty and the random nature of the process distribution, helper robot selection must follow both the basic principles of industrial robot arms and the characteristics of the job.

　　The main technical parameters of a hard-arm helper robot are as follows:

　　1) Manipulation force (also known as arm force or load), i.e. the weight of the workpiece to be grasped abducted. Robot manipulation force is related to the speed at which the robot works and often requires a limited speed to show manipulation force.

　　2)Reaction speed, i.e. the speed at which the robot works throughout its stroke.

　　3)Stroke, i.e. the range of the robot's motion strokes.

　　4)Positioning accuracy, i.e. the accuracy of the robot's positioning settings and repeat positioning.

　　5)Positioning methods can be accomplished using travel switches, mechanical blocks and various sensors.

　　6) Number of degrees of freedom, i.e. the number of degrees of freedom of movement common to the entire machine, arm and wrist, usually provided in the form of coordinates.

　　7) The method of transmission, i.e. what power source or drive system is used.

　　8)Size and weight, i.e. the size and ultimate weight of the robot.

　　9)Safety is the safety and reliability of the robot when it becomes hot and overloaded.

　　10)Program control method and capacity

　　11)Others (e.g. lifetime, power usage, cost, etc.).

　　Hard-arm power-assisted robots contribute to the widespread use of machine industry, greatly reducing the labour intensity of manual labour, workers are freed from heavy physical labour, greatly improving labour production and industrial automation, saving labour costs for enterprises and bringing obvious economic benefits. Hard-armed power-assisted robots effectively enhance the ability of enterprises to adapt to the market and the market competitiveness of enterprise products.