1、BSI Standards PublicationBS ISO 500-1:2014Agricultural tractors Rear-mounted power take-off types1, 2, 3 and 4Part 1: General specifications, safetyrequirements, dimensions for master shieldand clearance zoneBS ISO 500-1:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implement
2、ation of ISO 500-1:2014. Itsupersedes BS ISO 500-1:2004 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee AGE/6, Agricultural tractors and forestry machinery.A list of organizations represented on this committee can beobtained on request to its secretary.
3、This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 74592 8ICS 65.060.10Compliance with a British Standard cannot confer
4、immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2014.Amendments issued since publicationDate Text affectedBS ISO 500-1:2014 ISO 2014Agricultural tractors Rear-mounted power take-off types 1, 2, 3 and 4 P
5、art 1: General specifications, safety requirements, dimensions for master shield and clearance zoneTracteurs agricoles Prises de force montes larrire des types 1, 2, 3 et 4 Partie 1: Spcifications gnrales, exigences de scurit, dimensions du bouclier protecteur et de la zone de dgagementINTERNATIONAL
6、 STANDARDISO500-1Second edition2014-04-01Reference numberISO 500-1:2014(E)BS ISO 500-1:2014ISO 500-1:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any
7、form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 5
8、6 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 500-1:2014ISO 500-1:2014(E) ISO 2014 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Specifications . 15 P
9、TO-speed requirements for shiftable PTO . 26 Safety requirements . 27 Dimensions for tractor master shield aperture and clearance zone of PTO 2Bibliography 5BS ISO 500-1:2014ISO 500-1:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standa
10、rds 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 committee has been established has the right to be represented on that committee. International organ
11、izations, 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 electrotechnical standardization.The procedures used to develop this document and those intended for its f
12、urther 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 drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/direc
13、tives).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 rights. Details of any patent rights identified during the development of the document will be in the
14、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 constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related
15、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 committee responsible for this document is ISO/TC 23, Tractors and machinery for agriculture and forestr
16、y, Subcommittee SC 4, Tractors.This second edition cancels and replaces the first edition (ISO 500-1:2004), of which it constitutes a minor revision. It also incorporates the Corrigendum ISO 500-1:2004/Cor. 1:2005.ISO 500 consists of the following parts, under the general title Agricultural tractors
17、 Rear-mounted power take-off types 1, 2, 3, and 4: Part 1: General specifications, safety requirements, dimensions for master shield and clearance zone Part 2: Narrow-track tractors, dimensions for master shield and clearance zone Part 3: Main PTO dimensions and spline dimensions, location of PTOiv
18、ISO 2014 All rights reservedBS ISO 500-1:2014INTERNATIONAL STANDARD ISO 500-1:2014(E)Agricultural tractors Rear-mounted power take-off types 1, 2, 3 and 4 Part 1: General specifications, safety requirements, dimensions for master shield and clearance zone1 ScopeThis part of ISO 500 gives general spe
19、cifications, including speeds, safety requirements, the dimensions for master shield, and clearance zones for rear-mounted power take-offs (PTOs) of types 1, 2, 3, and 4 on agricultural tractors with a track setting of more than 1 150 mm (those with track setting width of 1 150 mm or less are covere
20、d in ISO 500-2).2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (incl
21、uding any amendments) applies.ISO 5673-2, Agricultural tractors and machinery Power take-off drive shafts and power-input connection Part 2: Specification for use of PTO drive shafts, and position and clearance of PTO drive line and PIC for various attachmentsISO 6489 (all parts), Agricultural vehic
22、les Mechanical connections between towed and towing vehicles3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1power take-offPTOexternal shaft on the rear of the tractor to provide rotational power to implements4 Specifications4.1 The tractor rear
23、power take-off (PTO) is classified into four types (see Table 1).4.2 The direction of PTO rotation shall be clockwise when viewed from behind the tractor except when a ground-driven PTO is operated with the tractor in reverse direction.4.3 The nominal PTO rated rotational frequency can be realized b
24、y one or more engine speed ranges. ISO 2014 All rights reserved 1BS ISO 500-1:2014ISO 500-1:2014(E)Table 1 Characteristics of PTO typesPTO typeNominal diameter mmNumber and type of splinesNominal PTO rated rotational frequency min-1Recommended PTO power at rated engine speedakW1 35 6 straight spline
25、s 540 651 000b1102 35 21 involute splines 1 000 1303 45 20 involute splines 1 000 3004 57,5 22 involute splines 1 300 450aDetermined in accordance with ISO 789-1 or OECD code 2.bThis option is not available in North America.5 PTO-speed requirements for shiftable PTO5.1 Should more than one ratio bet
26、ween the engine speed and the PTO rotation speed be provided, any change of ratio shall be indicated. In addition, specific design measures shall be taken to ensure that unintentional changes of ratio, particularly in changing to a higher rotational speed, cannot occur. This safety device shall oper
27、ate each time the PTO is engaged.5.2 A means to indicate when the PTO is operating at which nominal speed shall be provided.6 Safety requirements6.1 The PTO master shield, as shown in Figure 1 and Table 2, shall be supplied by the tractor manufacturer and shall be fixed to the tractor. If the same d
28、egree of safety protection is reached and the clearance zone is respected, equivalent protection devices (e.g. towing hook or clevis supports) can be used instead of the master shield. In this case, provisions shall be made for anchoring the restraining member of the PTO drive shaft guard.6.2 If nec
29、essary, the PTO master shield or a part of the shield can be movable without detachment from the tractor to facilitate attachment of the PTO drive shaft. The movable portion of the master shield shall be resistant to unintentional movement when in the operating position. The master shield can be mad
30、e of flexible material.6.3 If the PTO master shield can be used as a step, it shall withstand a vertical static load of 1 200 N without permanent deformation.6.4 An additional non-rotating casing which fully covers the PTO can also be supplied with the tractor to cover the PTO when the PTO is not in
31、 use.7 Dimensions for tractor master shield aperture and clearance zone of PTOThe dimensions of the tractor master shield aperture and the clearance zone around the PTO shall be in accordance with Figure 1 and Table 2.2 ISO 2014 All rights reservedBS ISO 500-1:2014ISO 500-1:2014(E)Key1 HoleaThe clea
32、rance can be restricted by movable and/or detachable devices. The clearance zone on towing vehicles shall be in accordance with ISO 6489 (all parts) and ISO 5673-2.bAngle optional under consideration of clearance zone.cFor coupling up the restraining member of the PTO drive shaft guard preventing gu
33、ard rotation.Figure 1 Tractor master shield aperture and clearance zone around PTO ISO 2014 All rights reserved 3BS ISO 500-1:2014ISO 500-1:2014(E)Table 2 Tractor master shield controlling dimensions for aperture and clearance zone dimensionsDimensionPTO type1 2 3a4bamin80 mm 80 mm 95 mm 105 mmmin60
34、 60 60 60 min50 50 50 50 min45 45 45 45 SRrmax76 mm 76 mm 90 mm 90 mmkmin70 mm 70 mm 80 mm 80 mmm 5 mm 125 mm 125 mm 150 mm 150 mmn 5 mm 85 mm 85 mm 100 mm 100 mmp 10 mm 290 mm 290 mm 360 mm 360 mmrmax76 mm 76 mm 90 mm 90 mmaFor tractors equipped with the PTO type 3 that can be adapted to also provi
35、de a PTO type 1 or 2, the master shield only needs to meet the specifications in Figure 1 and Table 2 for the PTO type 3.bFor tractors equipped with the PTO type 4 that can be adapted to also provide a PTO type 1, 2, or 3, the master shield only needs to meet the specifications in Figure 1 and Table
36、 2 for the PTO type 4.4 ISO 2014 All rights reservedBS ISO 500-1:2014ISO 500-1:2014(E)Bibliography1 ISO 789-1:1990, Agricultural tractors Test procedures Part 1: Power tests for power take-off2 OECD code 2, OECD standard code for the official testing of agricultural and forestry tractor performance
37、ISO 2014 All rights reserved 5BS ISO 500-1:2014ISO 500-1:2014(E) ISO 2014 All rights reservedICS 65.060.10Price based on 5 pagesThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and services.BSI
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