1. Preface ..........................................

2. Main design contents and parameters

3. Structural design of main girder

4. Design of trolley mechanism

7. Design of lifting mechanism .................................................... 1 1

6. Support design 14

8. Design Summary 15

9. Main references .................................... 16.

10. Preface of drawing document design

Crane is known as the "giant's arm" and is an important equipment widely used in material production and loading and unloading in various departments of the national economy. The design and manufacture of cranes reflect the industrial modernization level of the country from one side. China crane manufacturing industry was founded in 1950s. Since 1970s, the types, specifications, performance and technical level of cranes have made great progress. In recent years, driven by the development of logistics and industrial enterprises, the crane industry has entered a period of rapid development.

Cranes are mainly divided into bridge type, cantilever type, tower type, portal type, cable type and hydraulic telescopic boom type. This design takes the bridge-type double-beam single trolley container crane as an example, and introduces the design idea, design content and design method of the crane.

Crane design is mainly based on customer requirements, in line with national standards and machinery industry standards for cranes. The choice of design scheme is mainly determined after reaching a consensus through communication with customers. The design content mainly includes determining the maximum rated load and abnormal load (such as impact load, wind load and vibration load). ), the operation form, service life, maintenance mode and safety level of the crane under the actual working environment. Determine the material selection, processing and material treatment methods of the main parts of the crane; Determine the working level of the crane; Determine the section form, section size, material selection and processing method of the main stressed beam. Because of the large volume and mass of the bridge crane, the transportation scheme and installation method of the crane should also be considered in the design process. Main design contents and parameters 1. Crane should first determine the working level. The crane designed in this paper is used in container manufacturing or logistics industry.

Lifting parts are containers produced off-line or containers to be loaded in the logistics industry, so they are all empty containers. The lifting capacity is 5T. According to the crane industry standard, the production rhythm of container production industry and logistics industry is relatively fast. Therefore, the working level of the crane is A5, and the working level of the hoisting mechanism is M5. 2. Set the design content and parameters according to the level specified above. A. main girder structure

The main design contents or parameters of the main girder mainly include: section form, section size, materials used, manufacturing method, flatness of the upper plane of the main girder, flatness and verticality of the side surface, camber of the main girder, track installation on the main girder, etc. B. Support structure

The main contents and parameters of bracket design include: section form, section size, materials used, manufacturing method, verticality error of leg, connection mode between leg and ground, etc. C. trolley mechanism

The main contents and parameters of trolley mechanism design include: trolley frame design; Design of lifting mechanism; Design of traveling mechanism of trolley. Design the section of the trolley frame according to the lifting weight; According to the installation position of the required components, the structure of the small frame is designed; Design the power and model of the motor in the walking mechanism according to the working level; Determine the diameter and length of the drum according to the lifting height; Determine the power of the main motor and the model of the reducer according to the working level. Determine the models of some other components. It shall conform to the relevant contents in the crane industry standard; The control circuit belongs to the electrical category, so it will not be discussed here. This article comes from: first-class design bar (www. 16sheji8.cn). Detailed source reference: /onews.asp? id= 1220