QC/T 533-2020 PDF EnglishUS$290.00 · In stock · Download in 9 seconds
QC/T 533-2020: Commercial Vehicle Drive Axles Assembly Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid QC/T 533: Historical versions
QC/T 533-2020: Commercial Vehicle Drive Axles Assembly---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/QCT533-2020QC NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 43.040.50 T 21 Replacing QC/T 533-1999, QC/T 534-1999 Commercial Vehicle Drive Axles Assembly Issued on. DECEMBER 09, 2020 Implemented on. APRIL 01, 2021 Issued by. Ministry of Industry and Information Technology of PRC Announcement of the Ministry of Industry and Information Technology of the People's Republic of China No.48 (2020) Table of ContentsForeword... 6 1 Scope... 9 2 Normative References... 9 3 Terms and Definitions... 9 4 Technical Requirements... 11 5 Test Methods... 121 ScopeThis document specifies the technical requirements and bench test methods for commercial vehicle drive axle assembly. This document is applicable to commercial vehicle drive axle assembly, and passenger vehicle drive axle assembly and electric drive axle assembly can be implemented with reference to this document.2 Normative ReferencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this document. QC/T 1126 Automotive Drive Axle Terminology and Definition3 Terms and DefinitionsFor the purpose of this document, the following terms and definitions given in QC/T 1126 Automotive Drive Axle Terminology and Definition apply. 3.1 Axle housing vertical bending static strength safety factor The ratio of the vertical bending failure load to the fully loaded axle load of the axle housing. 3.4 Drive axle assembly maximum test torque In the drive axle assembly test, the maximum torque applied at the input end. 3.5 Drive axle assembly gear supporting rigidity The anti-deformation ability of the housing, driving and driven bevel gears, cylindrical gears in the drive axle assembly. 3.6 Saturated temperature In the drive axle assembly temperature rise test, the temperature of lubricating oil measured at the last moment, when the change amplitude in the temperature of the lubricating oil is no greater than 0.5°C, and the time interval reaches 60min.4 Technical Requirements4.1 Axle housing vertical bending rigidity When fully loaded with axle load, the maximum deformation per meter of wheelbase shall be no greater than 1.4mm. 4.2 Axle housing vertical bending static strength Axle housing vertical bending static strength safety factor Kn. tractors shall be greater than 5, trucks and passenger cars shall be greater than 6. 4.4 Drive axle assembly temperature-rise The upper limit of the saturation temperature difference is shown in Table 1; and the lubricating oil temperature-time relationship curve shall be smooth without sudden 4.5 Lubrication of drive axle assembly The lubrication condition shall meet the requirements of product technical conditions. 4.6 Drive axle assembly noise It shall meet the requirements of product technical conditions. 4.7 Drive axle assembly efficiency It shall meet the requirements of product technical conditions.5 Test Methods5.1 Axle housing vertical bending rigidity 5.1.1 Test sample 5.1.1.1 The test sample shall be a non-independent suspension drive axle housing. 5.1.1.2 The test sample shall meet the requirements of the design drawing, and the quantity shall be no less than 1 piece. 5.1.3 Test method 5.1.3.1 Install the sample according to the actual load state, the loading position is the centre of the stress point where the axle housing bears the weight of the vehicle, and the fulcrum is the corresponding position of the axle housing wheel track. 5.1.4 Data processing 5.1.4.1 Under the fully loaded axle load, after subtracting the error value (the error is converted proportionally based on the distance between each measuring point and the fulcrum) caused by the rigidity of the fulcrum, the gap, etc. from the 3-deformation data 5.1.4.2 Calculate the ratio of the maximum amount of deformation of the axle housing (mm) to the wheel track (m) under fully loaded axle load. 5.1.4.3 Draw the deformation amount of each measuring point under the fully loaded axle load and the specified load (all need to subtract the error value caused by the fulcrum), and connect them into a line. 5.2 Axle housing vertical bending static strength 5.2.1 Test sample The same as 5.1.1. 5.2.2 Test equipment and devices Hydraulic servo test system or other devices capable of applying loads, force sensors, etc. The relative error of force measurement shall be within ±1%. 5.2.3 Test methods 5.2.3.1 Perform in accordance with 5.1.3.1~5.1.3.3. 5.3.3 Test methods 5.3.3.1 Axle housing vertical bending fatigue 5.3.3.1.1 The test load waveform is a sine wave; the test load range of the axle housing of the tractor is (0.1±0.02) to 2.0 times the fully loaded axle load; and the test load range of the axle housing of freight cars and passenger cars is (0.1±0.02) to 2.5 times the fully loaded axle load. The test frequency shall be between 2Hz and 8Hz. 5.3.3.1.2 The sample installation requirements are the same as 5.1.3.1 and 5.1.3.2. 5.3.3.1.3 Preload to the maximum test load for 3 times, and start the test after unloading. 5.3.3.3.3 Preload to the test load for 3 times, and start the test after unloading. 5.3.3.3.4 Carry out the number of tests specified in the technical requirements or until the sample is damaged. Record the number of tests at the end of the test and the condition of the sample. 5.4 Drive axle assembly temperature-rise test 5.4.1 Test sample 5.4.1.1 The test sample shall meet the requirements of the design drawing, and the quantity shall be no less than 1 piece. 5.6.3 Test methods 5.6.3.1 There shall be no sound wave obstacles within 2m around the measuring point; and the height of the semi-axial centreline of the sample from the ground shall be no less than the tyre rolling radius. 5.9.3 Test methods 5.9.3.1 Take a sample for the gear support rigidity test; and record the test results. The test procedures are as follows. 5.9.3.1.1 The test input speed shall be no greater than 10r/min 5.10.3 Test methods 5.10.3.1 Add lubricating oil according to the technical requirements of the product. 5.10.3.2 Make the output end speed of one of the wheel ends of the drive axle 0. 5.10.3.3 The test input speed shall be equivalent to 10km/h forward speed. 5.10.3.4 The input torque Md in the test is calculated according to Formula (4). 5.10.3.5 According to the torques of 15%Md, 30%Md and 60%Md, respectively, the differential shall be run-in for 1h; lubricating oil temperature control requirements are the same as the gear bending fatigue test in 5.9.3.3.2. 5.10.3.6 The formal test torque is Md. The test consists of multiple temperature rise- fall cycles. 5.10.3.7 Record the lubricating oil temperature, load operation time and total load operation time of each temperature rise-fall cycle during the formal test. When the time (loading time) in temperature rise stage of the temperature rise-fall cycle drops below the critical value (that is, when damage occurs), the test shall be stopped immediately. 5.10.3.7.1 For differentials whose planetary gears and planetary gear shafts are in direct contact. 5.10.3.7.2 For differentials with needle bearings between planetary gears and planetary gear shafts. the time in temperature rise stage (loading) shall be no less than 30min. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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