GB/T 44622-2024Transmission flanges for commercial vehicles - Types A, S and T (English PDF)

Foreword

This document was drafted in accordance with the provisions of GB/T 1.1-2020

Directives for standardization - Part 1: Rules for the structure and drafting of

standardizing documents.

This document is modified in relation to ISO 7646:1986 Commercial vehicles and buses

- Gearbox flanges - Type A, ISO 7647:1986 Commercial vehicles and buses - Gearbox

flanges - Type S and ISO 8667:1992 Commercial vehicles and buses - Cross-tooth

gearbox flanges, type T.

Compared to ISO 7646:1986, ISO 7647:1986 and ISO 8667:1992, this document has

made the following structural adjustments:

-- Chapter 4 corresponds to Chapter 4 of ISO 7646:1986, Chapter 4 of ISO

7647:1986 and Chapter 3 of ISO 8667:1992;

-- 5.1 corresponds to Chapter 3 of ISO 7646:1986, 5.2 corresponds to Chapter 3 of

ISO 7647:1986, and 5.3 corresponds to Chapter 3 of ISO 8667:1992.

The technical differences between this document and ISO 7646:1986, ISO 7647:1986

and ISO 8667:1992 and their reasons are as follows:

-- The flange marking method (see Chapter 4) has been changed to adapt to the

unified provisions of this document;

-- The height tolerance of the T-flange tooth has been changed (see Figure 9) to

accommodate a wider range of processing techniques.

The following editorial changes have been made to this document:

-- ISO 7646:1986, ISO 7647:1986 and ISO 8667:1992 are integrated, and the

standard name is changed to "Transmission flanges for commercial vehicles -

Types A, S and T";

-- The annotation of the figures has been changed to comply with Chinese

mechanical drawing standards.

1 Scope

This document specifies the marking, type and dimensional parameters of Type A, S

and T transmission flanges for commercial vehicles.

This document applies to flanges installed between transmissions and mating

components in commercial vehicles.

2 Normative references

This document has no normative references.

3 Terms and definitions

There are no terms or definitions that require definition in this document.

4 Marking

The transmission flange shall be marked in detail in the following order:

a) The number of this document;

b) Type code;

c) Flange diameter d1 (applicable to type A and type T flanges) or specification

code (applicable to type S flanges);

d) Number of fixing bolts (applicable to type A and type S flanges);

e) Thread specifications of fixing bolts (applicable to type A and type S flanges).

EXAMPLE 1:

The transmission flange of type A, diameter d1=150 mm, number of fixing bolts=8, thread specification

of fixing bolts=12 mm is marked as:

Flange GB/T 44622-A 150×8×12

EXAMPLE 2:

......