QC/T 1020-2023 PDF English
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Drive shaft assembly for automobiles
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| QC/T 1020-2015 | English | 335 |
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Test methods for constant velocity universal joint and assembiles for automobiles
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QC/T 1020-2023: PDF in English (QCT 1020-2023) QC/T 1020-2023
QC
AUTOMOBILE INDUSTRY STANDARD
ICS 43.040.50
CCS T 21
Replacing QC/T 1020-2015
Drive shaft assembly for automobiles
ISSUED ON. DECEMBER 20, 2023
IMPLEMENTED ON. JULY 01, 2024
Issued by. Ministry of Industry and Information Technology of the PRC
Table of Contents
Foreword... 7
1 Scope... 9
2 Normative references... 9
3 Terms and definitions... 9
4 Symbols... 12
5 Technical requirements... 13
6 Test method... 14
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 replaces QC/T 1020-2015 "Test methods for constant velocity universal
joint and assembles for automobiles". Compared with QC/T 1020-2015, in addition to
structural adjustments and editorial changes, the main technical changes are as follows.
a) ADD the terms and definitions such as "drive shaft assembly", "boot", "maximum
bending angle", "rated torque", "damage torque", "rotational torque", "plunging
resistance", "static plunging resistance", "generated axial force", "high-frequency
plunging resistance", "drive efficiency" (see 3.1, 3.6, 3.9, 3.10, 3.12, 3.15, 3.18,
3.18.1, 3.18.2, 3.18.3, 3.19);
b) DELETE the terms and definitions of "constant velocity universal joint",
"constant velocity drive shaft", "drive shaft specifications", "universal joint
specifications", "maximum torque", "static torsional strength", "life", "torsional
fatigue", "rotational torque" (see 3.2, 3.4, 3.7, 3.8, 3.10, 3.11, 3.13, 3.14, 3.19 of
the 2015 edition);
c) CHANGE the terms and definitions of "universal joint", "fixing joint", "plunging
joint", "interconnecting shaft", "bending angle", "Johnson’s apparent elastic
limit", "quasi-static torsion strength" "rotational backlash", "axial clearance" (see
3.2, 3.3, 3.4, 3.5, 3.8, 3.11, 3.13, 3.16, 3.17; 3.1, 3.3, 3.5, 3.6, 3.9, 3.12, 3.15, 3.17,
3.20 of the 2015 edition);
d) ADD a chapter on "Symbols" (see Chapter 4);
e) ADD a chapter on "Technical requirements" (see Chapter 5);
f) ADD the test methods such as "fixed pitch bending angle", "static plunging
resistance", "generated axial force", "high-frequency plunging resistance", "drive
efficiency", "torsional stiffness", "boot rotation expansion", "boot tightness" (see
6.1, 6.7, 6.8, 6.9, 6.10, 6.12, 6.16, 6.17);
g) CHANGE the "displacement and bending angle" to "moving pitch displacement
and bending angle" (see 5.2, 6.2; 4.5 of the 2015 edition);
h) CHANGE the "torsional fatigue" to "torsional fatigue strength", deleting the
requirement in the test method to statistically analyze the test results according to
the Weibull distribution (see 5.14, 6.14; 4.3 of the 2015 edition);
i) CHANGE the "life" to "durable life", changing the multi-road segment test
procedure (see 5.15, 6.15; 4.4 of the 2015 edition);
Drive shaft assembly for automobiles
1 Scope
This document specifies the terms and definitions, symbols, technical requirements, test
methods of automotive drive shaft assemblies. This document is applicable to
automotive drive shaft assemblies.
2 Normative references
This document has no normative references.
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Drive shaft assembly
A combination of universal joints, interconnecting shafts and other parts, which are
installed between the differential or final reduction gear and the wheel hub, to
transmit torque and speed.
3.2
Universal joint
A joint mechanical device that can transfer torque and speed from one end to the
other end, when the angle between the two shafts remains unchanged or changes.
3.3
Fixing joint
A universal joint that can only change the working angle.
3.4
Plunging joint
A universal joint that can change the working angle and perform axial plunging
movement.
5 Technical requirements
5.1 Fixed pitch bending angle
The fixed pitch bending angle shall meet the product technical requirements.
5.2 Moving pitch displacement and bending angle
The moving pitch displacement and bending angle shall meet the product technical
requirements.
5.3 Rotational backlash
The rotational backlash of the drive shaft assembly shall not be greater than 60'.
5.4 Axial clearance
The axial clearance of the fixing joint shall not be greater than 0.6 mm.
5.5 Swing torque
The swing torque of the fixing joint with a boot shall not be greater than 20 N·m; the
swing torque of the fixing joint without a boot shall not be greater than 8 N·m.
5.6 Rotational torque
The rotational torque of the fixing joint with a boot shall not be greater than 10 N·m;
the rotational torque of the fixing joint without a boot shall not be greater than 5 N·m.
5.7 Static plunging resistance
The static plunging resistance shall meet the technical requirements of the product.
5.8 Generated axial force
The generated axial force shall meet the technical requirements of the product.
5.9 High-frequency plunging resistance
The high-frequency plunging resistance shall meet the technical requirements of the
product.
5.10 Drive efficiency
The drive efficiency of the drive shaft assembly shall not be less than 98%.
5.11 Static torsional strength
The Johnson’s apparent elastic limit of the drive shaft assembly shall not be less than
the rated torque; the breaking torque shall not be less than 1.35 times the rated torque.
5.12 Torsional stiffness
The torsional stiffness shall meet the product technical requirements.
5.13 Quasi-static torsional strength
The quasi-static torsional strength shall meet the product technical requirements.
5.14 Torsional fatigue strength
The torsional fatigue strength shall meet the product technical requirements.
5.15 Endurance life
The endurance life grade shall not be less than grade 3 or shall meet the product
technical requirements.
5.16 Boot rotation expansion
The boot rotation expansion shall not be greater than 7 mm.
5.17 Boot tightness
The air pressure in the boot has no continuous downward trend; no bubbles are visually
observed at the boot and the joints.
6 Test method
6.1 Fixing joint bending angle
6.1.1 Test equipment
6.1.1.1 The test equipment shall be able to bend and rotate the test piece.
6.1.1.2 The test equipment shall be able to measure and record the bending torque and
bending angle in real time.
6.1.2 Test method
6.1.2.1 Install the drive shaft assembly (hereinafter referred to as the "test piece") to the
test equipment as shown in Figure 1.The initial bending angle of the universal joint is
0°. The test piece shall not generate additional force in the initial state.
6.1.2.2 Start the test equipment; rotate the test piece at a fixed speed at (30 ~ 120) r/min
in the actual forward direction of the vehicle; make the fixing joint swing from 0° until
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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