BS EN ISO 4210-4-2014 Cycles Safety requirements for bicycles Braking test methods《自行车 自行车的安全要求 制动试验方法》.pdf

1、BSI Standards PublicationBS EN ISO 4210-4:2014Cycles Safety requirementsfor bicyclesPart 4: Braking test methods (ISO4210-4:2014)BS EN ISO 4210-4:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 4210-4:2014.Together with BS EN ISO 4210-1:2014, BS EN ISO

2、4210-2:2014, BS EN ISO 4210-3:2014, BS EN ISO 4210-5:2014, BS EN ISO 4210-6:2014, BS EN ISO 4210-7:2014, BS EN ISO 4210-8:2014, BS EN ISO 4210-9:2014 itsupersedes BS EN 14764:2005, BS EN 14766:2005 and BS EN 14781:2005, which are withdrawn.The UK participation in its preparation was entrusted to Tec

3、hnical Committee GME/25, Cycles.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institut

4、ion 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 78280 0 ICS 43.150 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2014.Amendments/co

5、rrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 4210-4 July 2014 ICS 43.150 Supersedes EN 14764:2005, EN 14766:2005, EN 14781:2005English Version Cycles - Safety requirements for bicycles - Part 4: Braking test methods (ISO 4210-4

6、:2014) Cycles - Exigences de scurit des bicyclettes - Partie 4: Mthodes dessai de freinage (ISO 4210-4:2014) Fahrrder - Sicherheitstechnische Anforderungen an Fahrrder - Teil 4: Prfverfahren fr Bremsen (ISO 4210-4:2014) This European Standard was approved by CEN on 21 June 2014. CEN members are boun

7、d to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CE

8、N-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre h

9、as the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, L

10、uxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Br

11、ussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 4210-4:2014 EBS EN ISO 4210-4:2014EN ISO 4210-4:2014 (E) 3 Foreword This document (EN ISO 4210-4:2014) has been prepared by Technical Committee ISO/TC 149 “Cycles“ in

12、collaboration with Technical Committee CEN/TC 333 “Cycles” the secretariat of which is held by UNI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2015, and conflicting national standards

13、 shall be withdrawn at the latest by July 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 14764:2005

14、, EN 14766:2005, EN 14781:2005. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement t

15、his European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slova

16、kia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 4210-4:2014 has been approved by CEN as EN ISO 4210-4:2014 without any modification. BS EN ISO 4210-4:2014ISO 4210-4:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroducti

17、on v1 Scope . 12 Normative references 13 Terms and definitions . 14 Test methods . 14.1 Brake lever grip dimensions . 14.2 Brake levers Position of applied force . 54.3 Brake-block and brake-pad assemblies Security test 74.4 Hand-operated braking-system Strength test 74.5 Back-pedal braking system S

18、trength test . 74.6 Braking performance . 84.7 Brakes Heat-resistance test . 25Annex A (informative) Explanation of the method of least squares for obtaining the line of best fit and 20 % limit lines for braking performance linearity 26Bibliography .29BS EN ISO 4210-4:2014ISO 4210-4:2014(E)ForewordI

19、SO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical c

20、ommittee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electr

21、otechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was dra

22、fted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent ri

23、ghts. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not consti

24、tute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe comm

25、ittee responsible for this document is ISO/TC 149, Cycles, Subcommittee SC 1, Cycles and major sub-assemblies.This first edition of ISO 4210-4, together with ISO 4210-1, ISO 4210-2, ISO 4210-3, ISO 4210-5, ISO 4210-6, ISO 4210-7, ISO 4210-8, and ISO 4210-9, cancels and replaces ISO 4210:1996, which

26、has been technically revised.ISO 4210 consists of the following parts, under the general title Cycles Safety requirements for bicycles: Part 1: Terms and definitions Part 2: Requirements for city and trekking, young adult, mountain and racing bicycles Part 3: Common test methods Part 4: Braking test

27、 methods Part 5: Steering test methods Part 6: Frame and fork test methods Part 7: Wheels and rims test methods Part 8: Pedals and drive system test methods Part 9: Saddles and seat-post test methodsiv ISO 2014 All rights reservedBS EN ISO 4210-4:2014ISO 4210-4:2014(E)IntroductionThis International

28、Standard has been developed in response to the demand throughout the world. The aim is to ensure that bicycles manufactured in compliance with this International Standard will be as safe as is practically possible. The tests are designed to ensure the strength and durability of individual parts as w

29、ell as of the bicycle as a whole, demanding high quality throughout and consideration of safety aspects from the design stage onwards.The scope is limited to safety considerations, and has specifically avoided standardization of components.If the bicycle is to be used on public roads, national regul

30、ations apply.For the purpose of improvement of repeatability and reproducibility, and considering the applicability to all types of bicycle and the size and influence of the operator, the machine test method reflects todays state of the art and is preferred to the track test method.Unless there is e

31、vidence of improvement of the test track method in the future, make this method informative for the next revision. Users of this International Standard are invited to provide their feedback to the ISO/TC 149/SC 1. ISO 2014 All rights reserved vBS EN ISO 4210-4:2014ISO 4210-4:2014(E)BS EN ISO 4210-4:

32、2014Cycles Safety requirements for bicycles Part 4: Braking test methods1 ScopeThis part of ISO 4210 specifies the braking test methods for ISO 4210-2.2 Normative referencesThe following referenced documents, in whole or in part, are normatively referenced in this document and are indispensable for

33、its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 4210-1, Cycles Safety requirements for bicycles Part 1: Terms and definitionsISO 4210-2:2014, Cycles Safety requirements

34、 for bicycles Part 2: Requirements for city b) a velocity-recording device (accurate to within 2 %) to record the velocity at the commencement of braking;c) a distance recording system (accurate to within 1 %) to record the braking distance;d) a water spray system, to provide wetting of the braking

35、surface, consisting of a water reservoir connected by tubing to a pair of nozzles at the front wheel and a pair of nozzles at the rear wheel. A quick-acting on/off valve shall be included for control by the rider. Each nozzle shall provide a flow of water at ambient temperature of not less than 4 ml

36、/s. Details of the positions and directions of nozzles for rim brakes, hub brakes, band brakes, disc brakes, and back-pedal brake are given in Figures 7 to 13;NOTE Figures 7 and 8 for rim brakes show side-pull callipers but the same arrangements apply to centre-pull callipers and cantilever brakes.e

37、) a brake-actuation indicating system to record independently when each lever or pedal is actuated.4.6.3.3 Mass of bicycle, rider, and instrumentationThe combined mass of the bicycle, the rider, and the instrumentation shall be 100 kg.When wet condition braking tests are performed, the combined mass

38、 can decrease throughout the test due to water consumption, but it shall not be less than 99 kg at the end of the valid test runs.Where a manufacturer specifies that their bicycle can carry a mass such that the sum of that mass plus the mass of the bicycle is in excess of 100 kg (60 kg for young adu

39、lts) to some value M, apply M as total weight.Any extra weight shall be positioned above the rear wheel and in front of the rear axle.4.6.3.4 Force applied to the brake leversa) Magnitude and position of force on brake levers ISO 2014 All rights reserved 9BS EN ISO 4210-4:2014ISO 4210-4:2014(E)Apply

40、 a handgrip force not exceeding 180 N at the point as specified in Figure 5. Check before and after each series of test runs to verify the lever force.b) Optional brake-force application deviceIt is permissible to use a test mechanism to operate the brake lever, and when such a device is used, it sh

41、all meet the requirements of 4.6.3.4 item a) and shall additionally control the rate of application of the brake lever force such that 63 % of the intended lever force is applied in not less than 0,2 s.4.6.3.5 Running in the braking surfacesA running-in process shall be conducted on every brake befo

42、re performance testing is carried out.Apply the brakes for not less than 3 s to maintain steady deceleration while the bicycle is being ridden at a speed of approximately 16 km/h. Repeat this operation 10 times.4.6.3.6 Test method Test runs under dry conditionsPedal the test bicycle until the specif

43、ied test velocity is attained (see ISO 4210-2:2013, Table 2). Then stop pedalling and apply the brakes. The bicycle shall be brought to a smooth, safe stop see ISO 4210-2:2013, 4.6.8.2 item a).4.6.3.7 Test method Test runs under wet conditionsThe method shall be as given in 4.6.3.6, with the additio

44、n that wetting of the brake system(s) shall commence not less than 25 m prior to the commencement of braking and shall continue until the bicycle comes to rest. Excessive amounts of water can be swept from the test track surface between runs.4.6.3.8 Number of valid test runsa) If the gradient of the

45、 track is less than 0,2 %, the following runs shall be made:1) five consecutive valid runs under dry conditions;2) two acclimatization runs under wet conditions (results not recorded);3) five consecutive valid runs under wet conditions.b) If the gradient of the track lies between 0,2 % and 0,5 %, th

46、e following runs shall be made:1) six consecutive valid runs under dry conditions with alternate runs in opposite directions;2) two acclimatization runs under wet conditions (results not recorded);3) six consecutive valid runs under wet conditions with alternate runs in opposite directions.A rest pe

47、riod not exceeding 3 min can be taken between successive runs.10 ISO 2014 All rights reservedBS EN ISO 4210-4:2014ISO 4210-4:2014(E)Key1 water nozzles2 fork crown3 front tee-piece4 wheel rim5 direction of the wheel rotationFigure 7 Water nozzles for rim-brake (front) ISO 2014 All rights reserved 11B

48、S EN ISO 4210-4:2014ISO 4210-4:2014(E)Dimensions in millimetresKey1 water nozzles2 rear tee-piece3 bicycle frame4 wheel rim5 brake assembly6 direction of the wheel rotationFigure 8 Water nozzles for rim-brake (rear)12 ISO 2014 All rights reservedBS EN ISO 4210-4:2014ISO 4210-4:2014(E)Key1 water nozz

49、le2 two water nozzles3 hub brake4 direction of the wheel rotationFigure 9 Water nozzles for hub-brake ISO 2014 All rights reserved 13BS EN ISO 4210-4:2014ISO 4210-4:2014(E)Dimensions in millimetresKey1 water nozzle2 bicycle frame3 rear tee-piece4 band brake5 rear hub6 direction of the wheel rotationFigure 10 Water nozzles for band-brake14 ISO 2014 All rights reservedBS EN ISO 4210-4:2014ISO 4210-4:2014(E)Dimensions in millimetresKey1 front hub2 water nozzles3 flexible pipe4 suspension-for