QC/T 647-2013 in English

1 Scope

This standard specifies performance requirements and test methods for steering universal joints of motor vehicle.

This standard is applicable to steering universal joints of motor vehicle.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 5179 Motor vehicle—steering system—Terms and definitions
QC/T 649 Motor vehicles—Steering control mechanism—Performance requirements and test methods

3 Terms and definitions

For the purposes of this standard, the terms and definitions defined in GB/T 5179 and the followings apply.

3.1
max. working angle
the maximum swing angle normally achievable by turning the universal joint to the extent no interference is generated between the two joint forks

3.2
swing moment
the value of the swinging moment of the universal joint fork swinging around the universal joint pin with the other universal joint fork fixed

3.3
clearance in turning direction
the clearance of the universal joint in turning direction

3.4
clearance of universal joint pin in axial direction
the clearance between the end face of the universal joint pin and the bearing or adjustment washer

Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Test sample
5 Performance requirements
6 Test conditions
7 Test methods