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GB/T 3565.6-2022: Safety requirements for bicycles - Part 6: Frame and fork test methods
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Safety requirements for bicycles - Part 6: Frame and fork test methods
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GB/T 3565.6-2022
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Basic data | Standard ID | GB/T 3565.6-2022 (GB/T3565.6-2022) | | Description (Translated English) | Safety requirements for bicycles - Part 6: Frame and fork test methods | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Y14 | | Classification of International Standard | 43.150 | | Word Count Estimation | 26,293 | | 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 3565.6-2022: Safety requirements for bicycles - Part 6: Frame and fork 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 6.Test methods for frame and front fork
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 III
Introduction V
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Frame test method 1
4.1 Frame---impact test (drop weight) 1
4.1.1 Overview 1
4.1.2 Test method 1
4.2 Frame and front fork assembly --- impact test (frame drop) 3
4.2.1 Overview 3
4.2.2 Test method 3
4.3 Frame --- pedal force fatigue test 4
4.3.1 Overview 4
4.3.2 Test method 5
4.4 Frame---horizontal force fatigue test 6
4.4.1 Overview 6
4.4.2 Test method 7
4.5 Frame---Vertical Force Fatigue Test 7
4.5.1 Overview 7
4.5.2 Test method 8
4.6 Vibration test of frame and front fork assembly 9
5 Front fork test method 10
5.1 Shock-absorbing front fork---tire clearance test 10
5.2 Front fork---tensile test 10
5.2.1 Shock-absorbing front fork---tensile test 10
5.2.2 Rigid non-welded front fork---tensile test 10
5.3 Front fork---static bending test 11
5.4 Front fork---backward impact test 11
5.4.1 Test method 1 11
5.4.2 Test method 2 13
5.4.3 Test method 3 13
5.5 Front fork---bending fatigue test plus rearward impact test 14
5.6 Special front forks for hub brakes or disc brakes 14
5.6.1 Overview 14
5.6.2 Front fork for hub brakes or disc brakes --- Static braking torque test 15
5.6.3 Front fork for hub brakes or disc brakes---brake fatigue test 15
APPENDIX A (NORMATIVE) SIMULATED FORK CHARACTERISTICS 17
Appendix B (Normative) Front Fork Mounting Fixture 18
Appendix C (Informative) Shock Absorbing Frame --- Tire Clearance Test 19
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 6 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 4210-6.2015 "Safety requirements for bicycles and two-wheeled bicycles - Part 6.Frame and front fork test methods
Law".
Compared with ISO 4210-6.2015, this document has made the following structural adjustments.
---Chapter 5 corresponds to Chapter 5 of ISO 4210-6.2015, of which 5.2.1 and 5.2.2 correspond to 5.2 and 5.7 of ISO 4210-6.2015;
---Deleted the title of C.1 in ISO 4210-6.2015, C.1 corresponds to C.1.1 and C.2 of ISO 4210-6.2015
C.1.2 of ISO 4210-6.2015.
The technical differences between this document and ISO 4210-6.2015 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;
--- In the schematic diagram of "Figure 3 Pedal Force Fatigue Test of Frame", the views of "direction A" and "BB" are added, supplementing ISO 4210-3.
2014 missing (see Figure 3);
--- In the "overview" of the horizontal force fatigue test of the frame, the content of the preload stroke of the shock-absorbing fork and the shock-absorbing frame is added to reflect the frame
In the horizontal fatigue test, the design concept of the preload travel method for the rear shock absorber front fork and shock absorber frame (see 4.4.1);
--- In the "overview" of the vertical force fatigue test of the frame, the shock-absorbing front fork is "locked in the
Length while on board" changed to "Lock it at a position equivalent to 25% of maximum travel"; increased rear shock preload travel
to reflect the design concept of the preload travel for shock-absorbing front forks and frame shock absorbers (see 4.5.1, ISO 4210-6.2015
4.5.1);
--- In the "test method" of the frame vertical force fatigue test, change the test cycle "50000 times" to "100000 times" to be the same as the other
The test cycle of other fatigue tests is harmonized; the description of "h3" is added in Figure 5 to make up for the omission of ISO 4210-6.2015
(See 4.5.2, Figure 5, 4.5.2 of ISO 4210-6.2015);
---In the "Frame Test Method", the requirements of "Combined Vibration Test of Frame and Front Fork" have been added to apply to special models, such as folding bicycles
Driving, it has a better verification effect of vehicle strength (see 4.6);
--- In the "front fork mounting fixture", the requirements for the vertical bar fixture have been added to prevent the front fork from rotating during the test (see Appendix B).
The following editorial changes have been made to this document.
--- Change the name of the standard to "Bicycle Safety Requirements Part 6.Test Methods for Frame and Front Fork" in order to be compatible with the existing standardized documents
file 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. Tianjin Aisaike Vehicle Industry Co., Ltd., Shanghai Xiedian Technology Service Co., Ltd., Lanxi Lunfeng Vehicle Material Co., Ltd.,
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 Customs Industrial Product Safety Technology Center, Tianjin
Municipal Product Quality Supervision and Testing Technology Research Institute Bicycle Research Center, Jiangsu Honghai Vehicle Inspection Co., Ltd. (National Light Industry Bicycle Quality
Supervising and Testing Changzhou Station), Wuxi Inspection, Testing and Certification Research Institute, Taizhou Product Quality and Safety Testing Research Institute, Intertek (Tianjin) Quality Technology
Services Ltd.
The main drafters of this document. Liu Qiang, Ruan Li, Shi Xin, Liu Bing, Chen Jun, Zhou Wenwei, Zhang Xu, Jia Gang, Chen Pingwei, Wan Yufeng, Zhou Guangjun,
Wu Yongbin, Jiang Yunfei, Ye Zhentao, Chen Xuefu.
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 competition 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
Satisfies the requirements and requires 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 6.Test methods for frame and front fork
1 Scope
This document describes impact tests, fatigue tests, combined vibration tests for bicycle frames and tire clearance, tensile tests, static
Test methods for bending test, rear impact test, bending fatigue plus rear impact test, static braking torque test and braking fatigue test.
This document is applicable to the test of frame and front fork 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.
GB/T 3565.3-2022 Bicycle Safety Requirements Part 3.General Test Methods (ISO 4210-3.2014, IDT)
3 Terms and Definitions
The terms and definitions defined in GB/T 3565.1 apply to this document.
4 Frame test method
4.1 Frame---Impact test (drop weight)
4.1.1 Overview
The frame manufacturer shall use the simulated front fork as specified in Appendix A instead of the front fork for the test.
If the frame can be changed from a male car to a female car by removing one tube, the test shall be carried out after removing the tube.
If the frame is equipped with a shock-absorbing front fork, the test is carried out with the shock-absorbing assembly of the front fork in the free length state without load.
For a frame equipped with a rear shock absorber, lock the shock absorber at a level equivalent to that of a rider with a weight of 80kg sitting on the bicycle
s position. For youth bicycles, lock the shock absorber at a level equivalent to that of a rider weighing 40kg sitting on the bicycle.
position; if the shock absorber is not permitted to be locked, a solid link of appropriate size with connections at both ends similar to the spring/shock absorber can be used in place of the spring.
Springs/Shock Absorbers.
4.1.2 Test method
Install a lightweight roller on the front fork, the mass of which is less than or equal to 1kg, and its dimensions are shown in Figure 1.The hardness of the impact surface of the roller should not be small
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