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QC/T 465-2023: Automotive mechanical transmission terminology and definition 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 465: Historical versions
QC/T 465-2023: Automotive mechanical transmission terminology and definition---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/QCT465-2023QC AUTOMOTIVE INDUSTRY STANDARD ICS 43.040.50 CCS T 21 Replacing QC/T 465-1999 Automotive Mechanical Transmission Terminology and Definition Issued on. DECEMBER 20, 2023 Implemented on. JULY 1, 2024 Issued by. Ministry of Industry and Information Technology of the People’s Republic of China Table of ContentsForeword... 7 1 Scope... 9 2 Normative References... 9 3 Terms and Definitions... 9 Index... 13ForewordThis Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for Standardization – Part 1.Rules for the Structure and Drafting of Standardizing Documents. This Document replaced QC/T 465-1999 Automotive Mechanical Transmission Terminology and Definition. Compared with QC/T 465-1999, the major technical changes of this Document are as follows besides the structural adjustments and editorial modifications. --- Add the scope (see Clause 1 of this Edition); --- Add normative references (see Clause 2 of this Edition); --- Delete the terms for fully constant mesh all spur gear transmission and fully constant mesh all helical gear transmission (see 2.3, 2.4 of the 1999 Edition); --- Delete the definition by the number of the installed synchronizers (see Clause 3 of the 1999 Edition); --- Add basic definitions (see 3.1 of this Edition); --- Modify the terms for single countershaft transmission (see 3.2.1.1 of this Edition; 1.1.1 of the 1999 Edition); --- Modify the English equivalents for dual countershafts transmission (see 3.2.1.2 of this Edition; 1.1.2 of the 1999 Edition); --- Modify the English equivalents for multiple countershafts transmission (see 3.2.1.3 of this Edition; 1.1.3 of the 1999 Edition); --- Modify the classification of constant mesh transmission (see 3.3.2.1, 3.3.2.2, 3.3.2.3 of this Edition; 3.1 and 3.2 of the 1999 Edition are adjusted to the classification of constant mesh transmission); --- Modify the English equivalent and definition of full synchromesh transmission (see 3.3.2.3 of this Edition; 3.2 of the 1999 Edition) --- Modify the English equivalent of main transmission or basic transmission (see 3.6.1.1 of this Edition; 6.1.1 of the 1999 Edition); --- Modify the English equivalent of splitter group or additional transmission (see 3.6.1.2 of this Edition; 6.1.2 of the 1999 Edition); --- Add a note on " ratio spread" (see 3.6.1.2 of this Edition); --- Add the definition by arrangement (see 3.7 of this Edition); --- Delete the terms for manual shift transmission and automatic shift mechanical transmission (see 5.1 and 5.4 of the 1999 Edition); --- Delete the terms for planetary gear pair transmission (see 6.3 of the 1999 Edition); --- Delete the terms for transmission with main reducer (see 7.1 of the 1999 Edition). Please note some contents of this Document may involve patents. The issuing agency of this Document shall not assume the responsibility to identify these patents. This Document was proposed by and under the jurisdiction of National Technical Committee of Auto Standardization (SAC/TC 114). Drafting organizations of this Document. Shanghai Automobile Gear Works; Shaanxi Fast Auto Drive Group Co., Ltd.; Chongqing Tsingshan Industrial Co., Ltd.; Qijiang Gear Transmission Co., Ltd.; and Harbin Dongan Automotive Engine Manufacturing Co., Ltd. Chief drafting staffs of this Document. Chen Zhen, Gong Rongying, Hu Hao, Zhang Xiaohua, Gao Tao, Jiang Kun, Guan Wanlong, Zhong Wenli, and Yuan Xiaoxing. The historical editions replaced by this Document are as follows. --- QC/T 465-1999; --- It is first-time revised hereby. Automotive Mechanical Transmission Terminology and Definition1 ScopeThis Document specifies the terms and definitions for the classification of mechanical transmissions with certain design and technical characteristics in automotives. This Document applies to Type-M and Type-N automotive mechanical transmissions defined in GB/T 15089-2001.2 Normative ReferencesThe provisions in following documents become the essential provisions of this Document through reference in 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. GB/T 15089-2001 Classification of Power-Driven Vehicles and Trailers3 Terms and Definitions3.1 Basic definitions 3.1.1 Mechanical transmission A transmission device that uses manual control to obtain multiple transmission ratios through gears and other mechanical elements, giving the vehicle forward and reverse functions. 3.2 Definition by shaft motion 3.2.1 Fixed shaft transmission A transmission in which the rotation center of all shafts remains unchanged. It is divided into single countershaft transmission, dule countershafts transmission, multiple countershafts transmission and two-shaft transmission. 3.2.1.1 Single countershaft transmission A fixed shaft transmission with only one countershaft. 3.2.1.2 Dual countershafts transmission A fixed shaft transmission with two countershafts. 3.2.1.3 Multiple countershafts transmission A fixed shaft transmission with three or more countershafts. 3.2.1.4 Twin-shaft transmission A fixed shaft transmission that consists of an input shaft and an output shaft, with a single-stage gear transmission for the forward gear, and an output shaft (single or two) that is constantly meshed with the main reduction driven gear. 3.2.2 Planetary transmission A transmission that is driven by the planetary gears. 3.3 Definition by gear shifting 3.3.1 Sliding gear transmission A transmission that most gears obtain different transmission ratios by axially sliding the gear to mesh with another gear. 3.3.2 Constant mesh transmission A transmission that the gears of most gears are often meshed, and obtains different transmission ratios by axially moving the gear sleeve or synchronizer to engage with the meshing teeth of the corresponding gears. 3.4 Definition by highest gear structure type 3.4.1 Direct drive transmission A transmission whose highest gear is direct gear (its output speed is equal to the input speed). 3.4.2 Overdrive transmission A transmission whose highest gear is an overdrive (its output speed is higher than its input speed). 3.5 Definition by control form 3.5.1 Direct control transmission A manual shift transmission in which gear changes are accomplished directly by a lever on the outside of the transmission. 3.5.2 Remote control transmission A manual shift transmission that completes the gear shifting function through a conversion mechanism. 3.5.3 Power assisted shift transmission A manual shift transmission that uses hydraulic, pneumatic, or electric power to assist in shifting. 3.5.4 Semiautomatic mechanical transmission A mechanical transmission in which part of the gear shifting is automated. 3.6 Definition by the combination of additional transmission and main transmission 3.6.1 Combinatory transmission A multi-gear transmission that is composed of a main transmission and an additional transmission. 3.6.1.1 Main transmission or basic transmission The basic transmission that plays a major role in the combinatory transmission. 3.6.1.2 Splitter group or additional transmission A transmission device with multiple gears, attached to the front or rear end of the main transmission, used to increase the gears of the transmission and expand the transmission ratio range. NOTE. The transmission ratio range (ratio spread) is the ratio of the maximum transmission ratio to the minimum transmission ratio. 3.6.2 Combinatory integral transmission A multi-gear transmission that consists of a main transmission and an additional transmission in a complete housing. 3.6.2.1 Integral front mounted splitter group A transmission device that is equivalent to the main transmission assembled in a complete housing and is equivalent to the front mounted splitter group. 3.6.2.2 Integral rear mounted range-change group A transmission device that is equivalent to the main transmission assembled in a complete housing and is equivalent to the rea-change group. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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