Abstr act:The article introduced the design of one whole constitution crane scale load cell, it owned the characteristics of compact
structure, high safety coefficient, easy to install and operate, low price.
Key word: crane scale; double ring crane; whole load cell; contract neck; swinging ring

1 The form and disadvantage of sensors at present
At present, a small amount of hook scales on the market uses sensors, usually S -shaped structures (as shown in Figure). There are strain films in the blind hole on both sides of the elastic body deformation. Two horizontal holes or ends of the threads are connected to one end and one end, which are connected to the axis of the rings and hook components with a thread; Because the structure characteristics of the sensor of the S -shaped structure, there is the following shortcomings:

1.2 The impact of the lifting angle has a greater impact on the scales (that is, the four corner errors are large).
1.3 Due to the low security factor under the cross section of the same force, in order to increase the safety factor, the cross -sectional area must be increased, resulting in an increase in volume increase.
2 The design of the overall sensor
According to the market's needs, we prepare a new structure of sensors. It is small, convenient for installation, convenient installation, and accuracy. First of all, the problem of the structure, we analyze the characteristics of the S -shaped structure, the plate ring structure, the columnar structure, the column structure, and the thin -walled blind hole structure. According to the requirements of 1T ~ 10T, the thin -walled blind hole is decided to choose a thin wall blind hole. As the basic structure of the strain part, the structure can meet the requirements of accuracy, overload capacity, and corner difference. Secondly, consider the connection structure problems at both ends, consider the reason for the convenience of processing and the installation of the ring, and the hook, and determine the use of a horizontal opening hole structure. In order to ensure the freedom of the two directions, the 90 -horizontal open hole structure is adopted. Third, consider cost and processing factors. The sensor requires the use of circular rods to process. Therefore, the overall structure during design is mainly circular section.