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QC/T 1022-2015 (QC/T1022-2015, QCT 1022-2015, QCT1022-2015) & related versions
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QC/T 1022-2015: PDF in English (QCT 1022-2015)
QC/T 1022-2015
ICS 43.040
T 47
Technical specification for reduction
gearbox of battery electric passenger cars
Issued by. Ministry of Industry and Information Technology of the
People 's Republic of China
Table of Contents
Notice ... 3 
Foreword ... 5 
1 Scope ... 6 
2 Normative references ... 6 
3 Terms and definitions ... 7 
4 Basic parameters ... 7 
5 Requirements ... 8 
6 Test methods ... 9 
7 Inspection rules ... 19 
8 Marks, packaging, transport and storage ... 20 
13 automotive industry standard numbers, standard names and date of
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Date of
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Technical specification for
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electric passenger cars
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General Requirement of Traction
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This Standard was drafted in accordance with the rules given in GB/T
1.1-2009 Directives for standardization - Part 1. Structure and drafting of
This Standard was proposed by and shall be under the jurisdiction of National
Technical Committee on Automobile of Standardization Administration of
China (SAC/TC 114).
This Standard does not involve patents.
Main drafting organization of this Standard. Anhui Xingrui Gear Transmission
Co., Ltd.
The drafting organizations of this Standard. China Automotive Technology
Research Center, Zhejiang You Knight Motor Co., Ltd., Anhui Jianghuai
Automobile Co., Ltd., Anhui Juyi Automation Equipment Co., Ltd., Chery New
Energy Automotive Technology Co., Ltd., Chongqing Changan New Energy
Automobile Co., Ltd., Zhejiang Geely Automobile Co., Ltd.
Main drafters of this Standard. Yin Xibing, Yang Haihua, Xue Limei, Zhou
Rong, Zhang Yingnan, Tao Cheng, Dong Demin, Li Qucheng, Xu Hua, Guo
Yanhui, Zheng Yichao, Shi Yong, Jiang Zhengjun, Wei Wensheng, Wu
Qingsuan, Liu Hui, Wang Shuwang, Cheng Zhongping, Yuan Changrong,
Guo Lishu.
Technical specification for reduction
gearbox of battery electric passenger cars
1 Scope
This Standard specifies the basic parameters, requirements, test methods,
inspection rules and marks, packaging, transport, storage for reduction
gearbox of battery electric passenger cars.
This Standard is applicable to reduction gearbox assembly for battery electric
passenger cars (hereinafter referred to as reducer).
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 191, Packaging. Pictorial marking for handling of goods
GB/T 2828.1, Sampling procedures for inspection by attribute - Part 1.
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
GB/T 10125, Corrosion tests in artificial atmospheres - Salt spray tests
GB/T 19596, Terminology of electric vehicles
QC/T 568.1, Rig testing method for auto manual transmission assembly -
Part 1. mini-vehicle
QC/T 572, Directives for motor vehicle cleanness - Measuring method
QC/T 573, Performance Requirements and Bench Test Methods for
Passenger Car Brake
QC/T 575, Work guide for automobile cleanness - Analysis method for
QC/T 29063.1-2011, Technical specification for auto manual transmission
assembly - Part 1. mini-vehicle
Reduction ratio -
5 Requirements
5.1 Basic requirements
5.1.1 The reducer shall comply with the requirements of this Standard and
shall be manufactured in accordance with the prescribed procedures for the
design of the product drawings and technical documents.
5.1.2 The appearance of the reducer shall be clean, without rust and
5.1.3 The fasteners, put oil plugs, etc. shall be tightened or installed
according to the tightening torque specified in the technical documents; shall
not be loose and missing.
5.1.4 There shall be no leakage oil at each joint surface and oil seal so as to
meet the requirements of sealing test.
5.1.5 Each movement part shall be flexible, without hysteresis.
5.1.6 There shall be no debris that affects the cleanliness of the reducer.
5.1.7 Reducer resistance to salt spray capacity shall be able to meet the
relevant provisions of GB/T 10125. The test period shall not be less than 48 h.
5.2 Bench test requirements
5.2.1 Dynamic sealing performance
During the test, the seals shall not have "drops" of oil leakage.
5.2.2 Temperature rise performance
During the test, the oil temperature of reducer shall not be greater than the
maximum allowable temperature. And the temperature time curve shall be
smooth without mutation.
5.2.3 High temperature performance
There shall be no oil leakage during the test. And bearings, gears, oil seals
and other parts shall not be ablated or damaged to affect the normal
operation of the reducer.
5.2.4 Fatigue life
After completion of the fatigue life test, the main parts shall not be damaged,
connection with the vehicle shall meet the design requirements.
6.1.2 Visually inspect the appearance of the reducer. It shall be free of dirt,
corrosion and oxidation.
6.1.3 Check the tightening torque of the bolt with the torsion torque wrench
6.1.4 The sealing test shall be carried out in accordance with the airtight or
immersion method specified in 6.1.6 of QC/T 29063.1-2011.
6.1.5 Fill lubricants as specified. Start the test bench. Carry out the positive
rotation test and the reverse rotation test in sequence. Check whether there is
the reducer stuck or abnormal sound. Or test the noise of the reducer under a
special test environment with an instrument.
6.1.6 Cleanliness test shall be performed in accordance with QC/T 572,
QC/T 573 and QC/T 575.
6.1.7 Salt spray test shall be carried out in accordance with the provisions of
GB/T 10125. The exposed area shall not be less than that in the installed
state of the vehicle. The duration of the test shall not be less than 48 h.
6.2 Bench test method
6.2.1 The test shall be carried out according to the requirements for bench
test of this Standard or purchaser.
6.2.2 Equipment Test equipment
The reducer bench test shall have the following equipment.
a) drive device in stable operation under the maximum input rotation
b) oil temperature and room temperature measurement recorder of
continuous recording reducer;
c) drive device;
d) suction device;
e) speed, torque and timer, measurement data logger;
f) safety device;
g) oil temperature control device;
3) the oil temperature is controlled within 80°C ± 5°C;
4) the test only measures the positive direction; determine in sequence
according to the requirements combined with speed, torque, oil
b) Test results.
1) draw a graph of the transmission efficiency speed and the
transmission efficiency torque at each test temperature according to
the measured results;
2) take the average of all detected transmission efficiencies as reducer’s
integrated transmission efficiency; calculate and determine according
to equation (1).
η - the average of transmission efficiency under 2 kinds of torques of 5 test
speeds shall be reducer’s integrated transmission efficiency. Differential reliability test
a) Test steps.
1) differential grinding-in. any one of the output is fixed not to rotate
while the other output can rotate freely; do positive rotation, empty
loading; operate for not less than 30 min at an input speed of 2000
r/min ± 10 r/min; replace lubricant after grinding-in is completed;
2) the test shall be c...

Standard ID QC/T 1022-2015 (QC/T1022-2015)
Description (Translated English) Technical specification for reduction gearbox of battery electric passenger cars
Sector / Industry Automobile & Vehicle Industry Standard (Recommended)
Classification of Chinese Standard T47
Classification of International Standard 43.040
Word Count Estimation 16,112
Date of Issue 2015-10-10
Date of Implementation 2016-03-01
Drafting Organization Anhui Xingrui Gear Transmission Co., Ltd
Administrative Organization National Automotive Standardization Technical Committee
Regulation (derived from) PRC MIIT Announcement 2015 No.63