Exchange rate VTI - dimensional analysis of the assembly unit

Contents

Introduction

1. Description of assembly unit

2. Analysis of smooth cylindrical joints

3. Calculation of rolling bearing fits

4. Calculation of gauge tolerance fields

5. Calculation of dimension chains

6. Defining Fits for Key Threaded Connections

7. Selection of universal measuring instruments

Conclusions

List of used literature

Introduction

In modern engineering, it is of great importance to organize the development and production of machines and mechanisms on the basis of interchangeability, creation and use of reliable measurement and control tools.

The interchangeability of products (machines, devices, mechanisms) is their ability to equally replace when using any of the great many copies of products, their parts or other products with other equivalent copies.

Meeting the accuracy requirements for parts and assemblies is an important requirement for interchangeability. Therefore, meeting the specified part requirements is a prerequisite for solving the assembly task of designing and designing mechanisms. The tools and methods of its solution may know the future designer.

Description of assembly unit

This unit is part of a two-stage cylindrical reduction gear box. This assembly is assembled in the following sequence: radial roller bearings 7 are installed on the shaft-gear 1. Then this structure is fixed in the detachable housing 10, one of the bearings is fixed by a washer and a remote ring 4. The ring in turn is clamped by a blind cover 3. On the other side the bearing is fixed by clutch 9, and between it and the ring there is an adjustment gap. The ring is clamped by an end cap 2 with an opening for the cuff seal 8. Gasket 5 is installed between covers and housing before fixation.