GB/T 8421-2020 Active National standards

GB/T 8421-2020 Agricultural wheeled tractors—Operator’s seat—Laboratory measurement of transmitted vibration

Publish Date: 2020-11-19 Implement Date: 2021-06-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 8421-2020

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: The driver's cab and other parts of the vehicle are separated by a partition wall.

ICS Name: Agricultural tractors and traction vehicles

Publish Date: 2020-11-19

Implement Date: 2021-06-01

Publisher: 国家市场监督管理总局、国家标准化管理委员会

Technical Committee: 全国拖拉机标准化技术委员会(SAC/TC 140)

Pages: 15 pages

Scope

本标准规定了农业轮式拖拉机驾驶员座椅悬架减振的一种实验室测量和评价方法，本标准符合GB/T 18707.1的要求。本标准也规定了基于测试结果基础上的评价指标，明确的规定了输入振动等级，涉及了三种等级的刚性后桥和无低频减振驾驶室单元的农业橡胶轮胎拖拉机，小于3 600 kg为1级，从3 600 kg～6 500 kg为2级，大于6 500 kg为3级，每一种都包含了有相似振动特征的一组拖拉机。
本方法测试了座椅悬架在1 Hz～20 Hz范围内对驾驶员全身垂直方向振动的减振效果。本测试方法不适用于座椅外对驾驶员的振动（例如驾驶员脚在底板上或者控制踏板上或者手在方向盘上的振动）。
注：本标准的测试准则是针对用于常规设计的农业拖拉机驾驶员座椅。独立的前轴或后轴，或者前后轴都独立的拖拉机，低频驾驶室悬架，这些将产生非常明显的不同振动特征。这些振动特征可依据 GB/T 10910 测得，或者使用其他在此种拖拉机上对座椅悬架性能进行测量和评价的方法。

Development Information

Drafting Units:

浙江四方集团公司、江苏悦达集团有限公司、洛阳西苑车辆与动力检验所有限公司、江苏沿海农业机械检测有限公司

Drafting Persons:

李红阳、陆凤祥、王风雨、廖汉平、胡华东、王旻嘉、李春风

Word Count: 28 Thousand words Pages: 15 pages

Replace the following standards

GB/T 8421-2000 Laboratory measurement and limits of operator's seat transmitted vibration for agricultural wheeled tractors

Referenced Standards

GB/T 13441.1-2007 Mechanical vibration and shock—Evaluation of human exposure to whole-body vibration—Part 1:General requirements GB/T 18707.1-2002 Mechanical vibration—Laboratory method for evaluating vehicle seat vibration—Part 1:Basic requirements ISO 2041 ISO 8041 ISO 13090-1:1998

Adopt standards

ISO 5007:2003

Related Standards

GB/T 5262-1985 Replaced

GB/T 5262-1985 Measuring methods for agricultural machinery testing conditions—general rules

Publish Date: 1985-07-25

GB 7121-1986 Replaced

GB 7121-1986 Agricultural and forestry wheeled tractors—Protective structures—Test method in the strength and acceptance conditions

Publish Date: 1986-12-30

GB 1593.4-1987 Abolished

GB 1593.4-1987 Agricultural wheeled tractors—Three-point linkage—Part 4:Category 0

Publish Date: 1987-01-02

GB/T 13875-1992 Replaced

GB/T 13875-1992 The general specification for walking tractors

Publish Date: 1992-11-14

GB/T 13876-1992 Replaced

GB/T 13876-1992 Agricultural wheeled tractors—Evaluation criteria of whole body vibration of the operator

Publish Date: 1992-11-14

GB/T 13878-1992 Abolished

GB/T 13878-1992 Agricultural tractors and self-propelled machines—Performance of heating and ventilation systems in closed cabs—Method of test

Publish Date: 1992-11-14