Standard No.:	QC/T 1022-2015
English Name:	Technical specification for reduction gearbox of battery electric passenger cars
Chinese Name:	纯电动乘用车用减速器总成技术条件
Chinese Classification:	T47    New energy vehicle and other automobiles
Professional Classification:	QC    Professional Standard - Automobile
Issued by:	MIIT
Issued on:	2015-10-10
Implemented on:	2016-3-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	5000 words
Price(USD):	110.0
Delivery:	via email in 1 business day

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This standard is developed 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 is under the jurisdiction of the National Technical Committee on Vehicles of Standardization Administration of China (SAC/TC 114). This standard is not involved with patents. Chief drafting organization of this standard: Anhui Xingrui Gear-transmission Co., Ltd. Participating drafting organizations of this standard: China Automotive Technology & Research Center, Zhejiang Unite Electric Motor Co., Ltd., Anhui Jianghuai Automobile Co., Ltd., Anhui Jee Automation Equipment Co., Ltd., Chery New Energy Automotive Technology Co., Ltd., Chongqing Changan New Energy Automobile Co., Ltd. and Geely Holding Group. Chief drafting staff 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 Qingmiao, 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, marking, packaging, transportation and storage of reduction gearbox of battery electric passenger car. This standard is applicable to speed reduction gearbox of battery electric passenger car (hereinafter referred to as reduction gearbox). 2 Normative References The following documents are indispensable for the application of this standard. For dated references, only the dated edition of the normative document referred to 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 Test 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 Rules for Cleanliness of Automobile - Determination Method QC/T 573 Rules for Cleanliness of Automobile - Personnel, Articles and Environment QC/T 575 Rules for Cleanliness of Automobile - Analysis Method of 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 standard, the terms and definitions specified in GB/T 19596 and those listed below apply. 3.1 positive rotation install the reduction gearbox in required mode, when the vehicle goes forward, the input shaft of reduction gearbox will be subject to positive rotation 3.2 reverse rotation install the reduction gearbox in required mode, when the vehicle goes backward, the input shaft of reduction gearbox will be subject to reverse rotation 3.3 positive drive in bench test, input terminal of reduction gearbox provides driving force 3.4 reverse drive in bench test, output terminal of reduction gearbox provides driving force 3.5 differential rate the percentage ratio of rotation speed difference between two output terminals of differential mechanism to rotation speed at input terminal of differential mechanism 3.6 coast the mode when the input driving force of reduction gearbox is cut off, it will continue to operate under inertial effect 4 Basic Parameters See Table 1 for basic parameters of reduction gearbox. Table 1 Basic Parameters Parameter name Unit Maximum input rotation speed r/min Maximum input torque N·m Rated power kW Maximum power kW Permissible temperature ℃ Reduction ratio — 5 Requirements 5.1 Basic requirements 5.1.1 The reduction gearbox shall meet the requirements of this standard and be manufactured according to the product drawings and the technical documents approved by the established procedures. 5.1.2 The appearance of reduction gearbox shall be clean and free from rust and oxidation phenomena. 5.1.3 Each fastener and charge/drain plug shall be tightened up or installed according to the tightening torque specified in technical documents, and they shall be free from looseness or missing assembling. 5.1.4 Each joint surface and oil-seal position shall be free from fuel leakage and meet the requirements of airtightness detection. 5.1.5 Each moving part shall operate flexibly and be free from abnormal noise caused by clamping stagnation. 5.1.6 Reduction gearbox shall be free from foreign materials affecting its cleanliness value. 5.1.7 The anti-salt mist capacity of reduction gearbox shall be able to meet the relevant requirements of GB/T 10125 and the test cycle is not less than 48h. 5.2 Bench test requirements 5.2.1 Dynamic airtightness performance. Each sealing element shall be free from "drop"-shaped fuel leakage during test. 5.2.2 Temperature rise performance. The fuel temperature of reduction gearbox during test shall not be greater than the maximum permissible temperature and the temperature-time curve shall be smooth and free from abrupt change. 5.2.3 High temperature performance. The test process shall be free from fuel leakage phenomenon and the parts such as bearing, gear and oil seal shall be free from ablation or damage affecting the normal operation of reduction gearbox. 5.2.4 Fatigue life. After completion of fatigue life test, main parts shall be free from damage, e.g. fracture, serious spot corrosion on tooth surface (with spot corrosion area greater than 4mm2 or depth greater than 0.5mm), stripping, clamping stagnation of bearing etc. 5.2.5 Driving efficiency. Comprehensive driving efficiency shall not be less than 95%. 5.2.6 Differential reliability. After completion of reliability test of differential mechanism, the differential mechanism shall rotate flexibly and free from abnormal noise caused by clamping stagnation. 5.2.7 High speed performance. The test process shall be free from fuel leakage phenomenon and the parts such as bearing, gear and oil seal shall be free from ablation or damage affecting the normal operation of reduction gearbox. 5.2.8 Overspeed performance. The test process shall be free from fuel leakage and abnormal noise and the parts such as bearing, gear and oil seal shall be free from damage affecting the normal operation of reduction gearbox. 5.2.9 Static torsional strength. The reserve coefficient of static torsional strength shall not be less than 2.5. 5.2.10 Noise. 5.2.10.1 Loading noise. The load noise of reduction gearbox shall not be greater than 83dB(A). 5.2.10.2 Coast noise. The noise value of reduction gearbox operating under inertial effect shall not be greater than the noise value of it operating before cutting the driving force. 5.3 Cleanliness The ratio of total content of impurities in reduction gearbox to the rated injection volume of lubricating oil shall not be greater than 50mg/L.

Foreword i 1 Scope 2 Normative References 3 Terms and Definitions 4 Basic Parameters 5 Requirements 6 Test Method 7 Inspection Rules 8 Marking, Packaging, Transportation and Storage