GB/T 3565.4-2022 English PDF

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GB/T 3565.4-2022: Safety requirements for bicycles - Part 4: Braking test methods
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Similar standards

GB/T 3565.1   GB 3565.2   GB/T 3564   GB/T 3565.6   GB/T 3565.7   GB/T 3565.5   

Basic data

Standard ID: GB/T 3565.4-2022 (GB/T3565.4-2022)
Description (Translated English): Safety requirements for bicycles - Part 4: Braking test methods
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Y14
Classification of International Standard: 43.150
Word Count Estimation: 26,270
Date of Issue: 2022-12-30
Date of Implementation: 2023-10-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 3565.4-2022: Safety requirements for bicycles - Part 4: Braking test methods

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 43.150 CCSY14 National Standards of People's Republic of China Bicycle Safety Requirements Part 4.Test methods for brakes Part 4.Braking test methods, MOD) Posted on 2022-12-30 2023-10-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee

table of contents

Preface I Introduction II 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Test method 1 4.1 Grip Size 1 4.2 Brake handle --- force position 3 4.3 Brake shoe and brake disc assembly---safety test 4 4.4 Hand brake system---strength test 5 4.5 Foot brake system---strength test 5 4.6 Braking performance 6 4.7 Brake --- heat resistance test 18 Appendix A (informative) Explanation of the least squares method for obtaining the best straight line and ±20% limit line in the braking performance linearity test 20 Reference 22

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents" drafting. This document is part 4 of GB (/T) 3565 "Safety Requirements for Bicycles". And GB 3565.2 "Bicycle Safety Requirements Part 2 Subdivision. Requirements for City and Touring Bicycles, Youth Bicycles, Mountain Bicycles and Competition Bicycles" is the supporting standard. GB (/T)3565 The following 9 parts have been released. --- Part 1.Terms and definitions; --- Part 2.Requirements for city and touring bicycles, youth bicycles, mountain bikes and racing bicycles; --- Part 3.General test methods; --- Part 4.Brake test method; --- Part 5.Test methods for handlebars; --- Part 6.Test methods for frame and front fork; --- Part 7.Test methods for wheels and rims; --- Part 8.Test methods for pedals and drive systems; --- Part 9.Test methods for saddles and saddle tubes. This document is modified to adopt ISO 4210-4.2014 "Safety requirements for bicycles and two-wheeled bicycles - Part 4.Test methods for brakes". The technical differences between this document and ISO 4210-4.2014 and their reasons are as follows. --- Replaced ISO 4210-1 with the normatively quoted GB/T 3565.1 to adapt to my country's technical conditions and increase operability (see Clause 3, Clause 3 of ISO 4210-4.2014); --- In the "Measurement method of C-type brake handle", the inspection method of "brake handle with position adjustment" is added, which is consistent with GB 3565.2; Changed the "Installation method of the gauge in C-type brake handle and handle bar in Figure 4" to correct the error in the original figure (see 4.1.2, Figure 4, ISO 4210-4. Figure 4 of.2014); ---In the "dry state test" of the "testing machine test method", change the operating force from "completely applied within 1s" to "0.5s after the brake is activated" "Complete application within" to facilitate accurate measurement of braking performance; delete "time to measure each operating force increment" and "time to measure braking force Time", which is convenient for test measurement and operability [see 4.6.5.7c)1), ISO 4210-4.2014's 4.6.5.7c)1)]; --- In the "brake heat resistance test", the requirement that "the brake system can be adjusted" is added to make the braking performance comparison under the same conditions Compared with; increase the coefficient "c" in the braking energy calculation formula (5) to adapt to the various qualities of the bicycle recommended (see 4.7). The following editorial changes have been made to this document. --- Change the name of the standard to "Bicycle Safety Requirements Part 4.Brake Test Method" in order to be compatible with the existing standardized documents coordination. Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China National Light Industry Council. This document is under the jurisdiction of the National Bicycle Standardization Technical Committee (SAC/TC155). This document is drafted by. Tangze Transportation Equipment (Taizhou) Co., Ltd., Shanghai Xiedian Technology Service Co., Ltd., Lanxi Lunfeng Vehicle Material Co., Ltd. Company, Shanghai Phoenix Bicycle Co., Ltd., Giant (China) Co., Ltd., Shenzhen Meidahang Technology Co., Ltd., Dimai (Shanghai) Enterprise Management Co., Ltd., Tianneng Battery Group Co., Ltd., Kunshan Customs Comprehensive Technical Service Center, Tianjin Product Quality Supervision and Testing Technology Research Institute Research Institute Bicycle Research Center, Wuxi Inspection and Certification Research Institute, Taizhou Product Quality and Safety Inspection Research Institute, Intertek (Tianjin) Quality Technical Services Ltd. The main drafters of this document. Liu Xinzhen, Ruan Li, Chen Xuefu, Cao Zhongming, Shi Xin, Chen Jun, Xu Hao, Jia Gang, Chen Pingwei, Zhang Fengbo, Wu Yongbin, Ye Zhentao.

Introduction

GB (/T) 3565 "Safety Requirements for Bicycles" was drafted according to the safety requirements of bicycle products. To produce bicycles that are as safe as possible. GB (/T) 3565 "Bicycle Safety Requirements" consists of 9 parts. --- Part 1.Terms and definitions. The purpose is to unify the terminology used in each part of the standard. --- Part 2.Requirements for city and touring bicycles, youth bicycles, mountain bikes and racing bicycles. purpose is Classify the safety requirements of Category 4 bicycles into mandatory national standards for easy enforcement. --- Part 3.General test methods. The purpose is to centralize and unify the general test methods for bicycle safety requirements and facilitate operation. --- Part 4.Brake test method. The purpose is to carry out professional tests on the brake requirements in the bicycle safety requirements, and provide a basis for the brake test Opportunities for method improvement. --- Part 5.Test methods for handlebars. The purpose is to carry out professional tests on the handlebar requirements in the bicycle safety requirements, and to provide a basis for the handlebar test Opportunities for method improvement. --- Part 6.Test methods for frame and fork. The purpose is to conduct a professional review of the requirements for frame and front fork in bicycle safety requirements. Test and provide opportunities for improved test methods for frames and forks. --- Part 7.Test methods for wheels and rims. The purpose is to conduct a professional review of the requirements for wheels and rims in bicycle safety requirements Test and provide opportunities for improvement of test methods for wheels and rims. --- Part 8.Test methods for pedals and drive systems. The purpose is to meet the requirements for pedals and drive systems in bicycle safety requirements Conduct specialized tests and provide opportunities for improved test methods for pedal and drive systems. --- Part 9.Test methods for saddles and saddle tubes. The purpose is to conduct a professional review of the requirements for saddles and saddle tubes in bicycle safety requirements Test, and provide opportunities for the improvement of test methods for saddles and saddle tubes. GB 3565.2 is a mandatory national standard, and 7 test method standards (GB/T 3565.3~GB/T 3565.9) are recommended national standards Standard, used in conjunction with GB 3565.2.These 7 test method standards are designed to ensure the strength and reliability of individual components and bicycles Meet the requirements, and require consideration of safety aspects from the design stage. The scope of GB (/T) 3565 is limited to product safety considerations. If bicycles are used on public roads, the "Chinese People's The Road Traffic Safety Law of the Republic and relevant management regulations. To improve repeatability and reproducibility, and to take into account suitability, size and operator effects for all types of bicycles, the test The machine test method reflects the current advanced level and is more popular than the road test method. The safety and quality of bicycles is related to the traffic life safety of consumers. Since 1983, my country has released three versions of GB 3565.It has been 17 years since GB 3565-2005 was released and implemented. Provided technical support. GB 3565-2005 "Safety Requirements for Bicycles" is equivalent to ISO 4210.1996 "Safety Requirements for Two-wheeled Bicycles" Require". In.2014, ISO 4210 was revised and released again, from 1 standard to 9 standards. For this reason, GB 3565 also changed from the original 1 standard was revised into 9 standards, the standard level is synchronized with the international standard, and continues to provide technical support for the safety of bicycle products in our country. Bicycle Safety Requirements Part 4.Test methods for brakes

1 Scope

This document describes the grip dimensions of bicycle brakes, the location of brake lever force, assembly safety, braking system strength, braking performance, heat resistance sex test method. This document is applicable to the test of brake components of bicycle types involved in GB 3565.2.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 3565.1 Bicycle Safety Requirements Part 1.Terms and Definitions (GB/T 3565.1-2022, ISO 4210-1.2014, MOD) GB 3565.2-2022 Bicycle Safety Requirements Part 2.City and Touring Bicycles, Youth Bicycles, Mountain Bicycles Requirements for racing bicycles (ISO 4210-2.2015, MOD) Note. There is no technical difference between the referenced content of GB 3565.2-2022 and the referenced content of ISO 4210-2.2015.

3 Terms and Definitions

The terms and definitions defined in GB/T 3565.1 apply to this document.

4 Test method

4.1 Grip Dimensions 4.1.1 Measurement method of A-type or B-type brake handle Place the gauge shown in Figure 1 on the grip of the handlebar or the handlebar (when the manufacturer does not install the grip) and on the brake lever, as shown in Figure 2. As shown, make surface A close to the outer surface of the handlebar (or handlebar) and the brake handle. The B side is equivalent to the rider's fingers touching the brake handle. The section of the brake lever covered by the surface does not tend to move towards the handlebar or grip. Then measure a, which is the brake lever that the rider's finger touches when holding the lever The distance from the last part to the end of the brake lever. Measurements should be taken on a fully assembled bicycle. ......

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