Abstract: The load cell is known as the heart component of electronic weighing systems and electronic weighing instruments. The accuracy and stability of the load cell are directly related to the accuracy of the weighing system. In practical use, the load cell must be combined with the corresponding connecting parts in the weighing system to ensure the stable and reliable operation of the system. The role of connecting parts in the entire weighing system cannot be underestimated. It has become a consensus in the industry to follow certain principles in design and selection. Scientific design and reasonable selection of connecting parts will achieve twice the result with half the effort. 

【 Key Words 】 Load cell, Weighing system, connecting parts, Design I. Introduction The load cell is known as the heart component of the electronic weighing system and electronic weighing instrument. With the rapid development of science and technology, electronic weighing systems and electronic weighing instruments made of load cells have been widely applied in various industries, achieving rapid and accurate weighing of materials. Especially with the emergence of electronic microprocessing technology and the continuous improvement of the degree of automation in industrial production processes, load cells have become essential devices in process control. From commonly used weighing instruments such as electronic pricing scales and electronic truck scales to batching systems for mixing and distributing various raw materials, automatic detection in production processes, and control of powder and granular feed volumes, load cells are all applied. The installation of the load cell is between the load-bearing device and the foundation installation surface. If it is put into use after only simple connection, not only will the expected weighing accuracy not be achieved, but it is also prone to cause damage to the load cell and safety accidents. The connection part of the load cell, as a key component in the weighing value measurement process, directly affects the accuracy of the weighing measurement results. In practical applications, connecting components also play a role in resisting various interfering forces. When materials are added to the load-bearing device, the load-bearing beam of the load-bearing device will inevitably generate deflection, causing the fulcrum to produce an Angle. If the connection between the load-bearing beam of the load-bearing device and the load cell is not flexible, a "false signal" will inevitably occur, and it may also cause damage to the sensor. When the vehicle being weighed enters the load-bearing platform and brakes, a considerable horizontal impact force will be generated. Although it is equipped with a limit device, it is also necessary to have a suitable weighing connection piece to ensure rapid reset. Minimize the transmission of impact force to the load cell as much as possible. 3. In the vast majority of cases, the coefficient of linear expansion between the load-bearing and the installation surface of the foundation is inconsistent. The lateral force generated by changes in environmental temperature will cause the load cell to output a weighing value independent of it. 4. When installing large electronic weighing instruments, there will inevitably be a certain deviation in the installation position between the load-bearing and the installation foundation surface. Therefore, the connecting parts must ensure that they have a certain swing Angle and displacement. 5. The load-bearing devices are usually connected by welding. Over time, they may undergo irregular twisting due to stress release, which also requires appropriate changes in the shape and position of the connecting parts.