Automotive crane design

Contents

1. Assignment for the exchange rate project

2. Entry

2.1. Project Relevance

2.2. Project Objective

2.3. Main Project Tasks

3. Technical analysis

4. Calculation of lifting mechanism

4.1 Hook Suspension Selection

4.2 Selection of channel

4.3 Determination of drum length and main dimensions of drum installation

4.4 Calculation of power and selection of hydraulic motor

4.5. Gearbox selection

4.6 Selection of connecting muff

4.7 Determination of brake torque and selection of brake

4.8 Calculation of rope attachment to drum

4.12 Check of brake time

4.13.Verifying drum wall strength and stability

4.14 Calculation of bolts connecting the gear ring to the drum

5. Calculation of rotation mechanism

5.1. Definition of overturning momen

5.2. Selection of missile defense system

5.3. Determination of turns resistance

5.4. Selection of hydraulic motor

5.5. Gearbox selection

5.6. Muf-ta Selection

5.7. Brake selection

6. Conclusion

List of used literature

Application

2. Introduction

2.1. Project Relevance

Lifting and transportation machines and mechanisms (including bridge crane) are the main means of mechanization and automation of loading and unloading operations in all industries and agriculture.

Car lifting cranes are the main means for loading and moving various materials, as well as for performing heavy installation work in a workshop or workshop, which is currently relevant.

2.2. Project Objective

The main goal of the project is to obtain a practical skill in designing crane structures.

2.3. Main tasks of the project

a) perform technical analysis of mechanisms of automobile cranes

b) calculate and design the mechanism for lifting (lowering) the cargo of the automobile crane

-select rope and hook suspension

-compute drum parameters

-assemble motor, gearbox, clutch, brake, bearings

-Process design and verification calculations

c) calculate and design the rotation mechanism

-define static loads on the support-rotary device and resistance to rotation

-select the control panel

- select hydraulic motor, reduction gear box, couplings, brake

-provide verification calculations

6. Conclusion

As a result of the course project, an automobile crane with a carrying capacity of 16 tons and a light operating mode (A3) was designed.

The design part consists of two parts: a lifting mechanism and a turning mechanism.

The following calculation was made in the lifting mechanism:

- a double rope of the LCR type with a diameter of 14 mm and having 1372 MPa at the marking group of wires is selected;

- hook suspension is selected;

- the dimensions of the drum, its diameter and total length are determined taking into account the multiplicity of the polyspast;

- rational material of the drum is selected and checked for strength by compressive stresses;

- couplings selected;

- hydraulic motor is selected;

The rotation mechanism calculates the drive for which:

- reference-turning circle is selected taking into account

- gearbox is selected;

On the basis of the calculation part, a graphic is made, in which it is displayed on sheets in A1 formats:

- general view of the crane;

- load lifting (lowering) mechanism;

- turning mechanism;

- drum.