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Technical specification for reduction gearbox of battery electric passenger cars
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QC/T 1022-2015: Technical specification for reduction gearbox of battery electric passenger cars
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/QCT1022-2015
QC
AUTOMOTIVE INDUSTRY STANDARD
ICS 43.040
T 47
Technical specification for reduction
gearbox of battery electric passenger cars
Issued on. OCTOBER 10, 2015
Implemented on. MARCH 1, 2016
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
Foreword
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
standards.
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
inspection
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
impurity
QC/T 29063.1-2011, Technical specification for auto manual transmission
assembly - Part 1.mini-vehicle
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T
19596 and the following ones apply.
3.1 positive rotation
The reducer is installed as specified. When the vehicle is advanced, the
rotation direction of reducer input shaft shall be positive rotation.
3.5 differential rate
The ratio of the differential output at both ends of the speed difference to the
differential input speed
3.6 coast
The mode that the reducer continues to operate under inertia when it cuts off
the reducer input power
4 Basic parameters
See Table 1 for basic parameters.
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.
5.1.5 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.
5.2.5 Transmission efficiency
Integrated transmission efficiency shall be not less than 95%.
5.2.6 Differential reliability
After completing the differential reliability test, the differential shall be flexible
and no hysteresis.
5.2.7 High speed performance
There shall be no oil leakage during the test period. And bearings, gears, oil
seals and other parts shall not be ablated or damaged to affect the normal
operation of the reducer.
5.2.8 Over-speed performance
During the test, there shall be no leakage of oil, abnormal sound
phenomenon. And bearings, gears, oil seals and other parts shall not be
damaged to affect the normal operation of the reducer.
5.3 Cleanliness
The total amount of impurities in the reducer shall not exceed 50 mg per liter.
6 Test methods
6.1 Assembly test
6.1.1 The output of the reducer, the position of the input and the size of the
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.
6.1.6 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
6.2.4.3 High temperature performance test
6.2.4.7 High speed performance test
6.2.4.9 Static torsion strength test
a) Test conditions.
1) the output shaft is fixed and the input shaft torsional speed does not
exceed 15 r/min;
2) the input shaft and output shaft are only subjected to torque and are
not allowed to have additional bending moments;
3) the working surface of the gear is the same as the positive drive
conditions.
b) Test steps.
1) turn the reducer positive and load it until it is damaged or reaches the
specified torque; then unload it to 0; record the input torque and the
corner of the input shaft when the damage occurs or when the
specified torque is reached;
2) detect one point for each one; detect three and take the minimum
value.
c) Test results. calculate the torsional strength reserve factor K1 according
to equation (2).
where,
M - torque recorded at the end of the test;
Memax - maximum input torque.
6.2.4.10 Loading noise test
6.2.4.11 Gliding noise test
7 Inspection rules
7.1 Exit-factory inspection
The reducers shall be able to leave factory after they are inspected as
qualified according to the exit-factory inspection requirements of
manufacturer. The exit-factory inspection requirements shall be carried out
according to the technical documents stipulated in this Standard or agreed by
the supplier and the purchaser. The inspection items shall contain the
contents of 5.1 of this Standard (but not limited to).
7.2 Type inspection
7.2.2 Type inspection sample shall be extracted at random from exit-factory
inspection qualified products according to GB/T 2828.1.3 samples for each
inspection item. The samples after completion of the fatigue life test or the
static torsion strength test can not be used for other test items. Samples after
completion of high-speed performance tests can not be used for fatigue life
test items. Samples that do not fail after completion of other test items can be
used for tests other than the inspection item.
7.2.4 Determination rules.
8 Marks, packaging, transport and storage
8.1 Marks
8.1.1 Product marks.
8.2 Packaging
8.2.1 Reducer packaging shall be dustproof, waterproof.
8.2.2 Packaging box shall be firm. The reducer shall be reliably secured in
the box to ensure that it does not bump and damage during normal transport.
8.2.3 When reducer leaves factory as an accessory, it shall be packed with
packaging box. When reducer leaves factory as a package product, the
packaging and transport methods shall be determined by the supplier and the
purchaser.
8.3 Transport
During transport, it shall cover the packaging box and prevent the reducer
from bump and damage.
8.4 Storage
The reducer shall be stored in a ventilated, dry, rainproof, sunscreen
warehouse. It shall not be stored with the flammable materials, chemical
corrosion and other items.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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