QC/T 647-2013Motor vehicles - Steering universal joints - Performance requirements and test methods (English PDF)
汽车转向万向节总成性能要求及试验方法
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Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
April 25, 2013
Implementation date
September 1, 2013
Scope
QC/T 647-2013 is the English-translated version of 汽车转向万向节总成性能要求及试验方法.
QC/T 647-2013 sets the performance requirements and test methods for the universal joints used in motor vehicle steering systems.
It covers the maximum working angle, swing moment, clearance in the turning direction, axial clearance of the universal joint pin, tension-compression strength of the joint and shaft, bearing extrusion force, which must exceed 1960 N, static torsional strength and an endurance test.
It also fixes the minimum number of samples for each test and how the clamp-fixed forks are bolted to their shafts during testing. Compared with the previous edition, the static torsional strength and endurance tests are new.
It replaces QC/T 647-2000. Issued on 25 April 2013, it has applied since 1 September 2013.
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Document preview — QC/T 647-2013
National Standard of the People's Republic of China
- Replacing
- QC/T 647-2000
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- Foreword3
- 1 Scope8
- 2 Normative references8
- 3 Terms and definitions8
- 4 Test samples9
- 5 Performance requirements9
- 6 Test conditions10
- 7 Test methods10
Foreword
This Standard is a revised version of QC/T 647-2000 "Motor vehicles - Steering universal joint - Performance requirements and test methods".
The main revisions of this Standard to QC/T 647-2000 are as follows.
- ADD the static torsional strength and endurance test;
- REVISE some performance requirements. This Standard replaces QC/T 647-2000 from the date of implementation.
3 Terms and definitions
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 adjusting washer.
3.5 Extruding force of bearing
The force required to extrude the bearing when the bearing is fixed in the bearing hole of the universal joint fork to prevent the bearing from sliding out of the bearing hole of the universal joint fork.
4 Test samples
The test samples shall be made in accordance with the drawings and technical documents approved by the specified procedures. The materials, dimensions, heat treatment and assembly conditions shall comply with the drawings and technical documents. There shall be at least 1 test sample for the endurance test, at least 1 test sample for the static torsional strength test, and at least 3 test samples for other test items.
5 Performance requirements
Unless otherwise specified, steering universal joints of motor vehicles shall meet the following requirements. […]
5.1 Maximum working angle
The maximum working angle meets the design requirements.
5.2 Swing moment
The maximum swing moment is 0.39 N · m.
5.3 Clearance in turning direction
The clearance in turning direction shall not be greater than 15'.
5.4 Clearance of universal joint pin in axial direction
The clearance in axial direction meets the design requirements.
5.5 Tension-compression strength of universal joint and shaft
There is no damage, shedding or sliding of the universal joint.
5.6 Extruding force of bearing
The extruding force of the bearing shall be greater than 1960 N.
5.7 Static torsional strength
The universal joint has no yield.
5.8 Endurance test
The universal joint is not damaged.
6 Test conditions
On the clamp-fixed universal joint fork used in each test item, the corresponding shaft used on the vehicle shall be assembled, and the bolts shall be tightened to the minimum specified moment.
Only in the swing moment test, the bolts of the clamp-fixed universal joint fork are required to be tightened to the maximum specified moment value.
7 Test methods
7.1 Maximum working angle
SWING one universal joint fork of around the other universal joint fork, while continuously turning the universal joint, see Figure 1.MEASURE the maximum possible working angle of turning alphamax. The measurement error shall be within ±1° range.
7.2 Swing moment
FIX one universal joint fork, and SWING the other universal joint fork around the universal joint pin. In the same way, EXCHANGE the fixing of the universal joint forks, and MEASURE the maximum swing moment of the two universal joint forks respectively. The measurement error is not greater than 2 %. […]
7.3 Clearance in turning direction
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Similar standards
Editions of QC/T 647
| Edition | Title | Revision | Status |
|---|---|---|---|
| QC/T 647-2013 | Motor vehicles - Steering universal joints - Performance requirements and test methods | current edition | Current |
| QC/T 647-2000 | Motor vehicles - Steering universal joints - Performance requirements and test methods | previous edition | Superseded |
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