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1、BRITISH STANDARD BS EN 12965:2009 Tractors and machinery for agriculture and forestry Power take-off (PTO) drive shafts and their guards Safety The European Standard EN 12965:2003 has the status of a British Standard ICS 65.060.01 ? - - BS EN 12965:2009 This British Standard, was published under the
2、 authority of the Standards Policy and Strategy Committee on 26 June 2003 BSI 26 June 2009 ISBN 0 580 42155 4 National foreword This British Standard is the official English language version of EN 12965:2003. The UK participation in its preparation was entrusted to Technical Committee AGE/6, Agricul
3、tural tractors and forestry machinery, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Users may wish to note that the committee voted against the implementation of this standard because they did not deem it to be a
4、comprehensive coverage of the topic. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facili
5、ty of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations.
6、 aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages
7、 This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 21 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments - - EUROPEAN STANDARD NORME EUROP
8、ENNE EUROPISCHE NORM EN 12965 June 2009 ICS 65.060.01 English version Tractors and machinery for agriculture and forestry - Power take-off (PTO) drive shafts and their guards - Safety Tracteurs et matriels agricoles et forestiers - Arbres de transmission cardans de prise de force et leurs protecteur
9、s - Scurit Traktoren und Maschinen fr die Land- und Forstwirtschaft - Gelenkwellen und ihre Schutzeinrichtungen - Sicherheit This European Standard was approved by CEN on 13 February 2003. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for gi
10、ving 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 Management Centre or to any CEN member. This European Standard exists in three official versi
11、ons (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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cze
12、ch Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Ma
13、nagement Centre: rue de Stassart, 36 B-1050 Brussels 2009 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12965:2009 E - - EN 12965:2009 (E) Contents Page Foreword3 0Introduction4 1Scope 4 2Normative references 4 3Terms and definiti
14、ons5 4Requirements and/or safety measures8 4.1General requirements8 4.2Universal joint 8 4.3Wide-angle universal joint 9 4.4Guard.11 4.5Intervention points.11 4.6Restraining system11 5Verification of safety requirements and/or measures11 5.1General11 5.2Test for cone guarding the universal joints11
15、6Information for use 13 6.1Instruction handbook 13 6.2Marking and warning.15 Annex A (normative) List of hazards.16 Annex ZA (informative) Relationship of this document with EC Directives20 Bibliography21 EN 12965:2009 (E) Foreword This document (EN 12965:2003) has been prepared by Technical Committ
16、ee CEN /TC 144, “Tractors and machinery for agriculture and forestry“, the secretariat of which is held by AFNOR. 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 December 2003, and conflicting nat
17、ional standards shall be withdrawn at the latest by December 2003. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EC Directive(s). For relationship with EC Directive(s), see infor
18、mative annex ZA, which is an integral part of this document. EN 1152:1994 “Tractors and machinery for agriculture and forestry Guards for power take-off (PTO) drive shafts Wear and strength tests“ complements this European Standard which gives definitions and requirements concerning PTO drive shafts
19、 and their guards. Annex A is normative. This document includes a Bibliography. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France
20、, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. - - EN 12965:2009 (E) 0 Introduction This European Standard is a type C standard as defined in EN 1070. The machinery concerned and the
21、extent to which hazards, hazardous situations and events are covered are indicated in the scope of this document. When provisions of this type C standard are different from those which are stated in type A or B standards, the provisions of this type C standard take precedence over the provisions of
22、the other standards, for machines that have been designed and built according to the provisions of this type C standard. The hazards that are common to agricultural machines (self-propelled, mounted, semi-mounted and trailed) are dealt with in EN 1553. 1 Scope This standard specifies safety requirem
23、ents and their verification for the design and construction of power take-off (PTO) drive shafts and their guards linking self-propelled machinery (or tractor) to the first fixed bearing of recipient machinery, by describing methods for the elimination or reduction of risks which need specific requi
24、rements. This standard concerns only the PTO drive shafts and those guards which are mechanically linked to the PTO drive shaft by at least two bearings. In addition, it specifies the type of information on safe working practices to be provided by the manufacturer. This standard does not deal with:
25、? the guards totally covering, but not mechanically linked to, the PTO drive shaft. As these devices are not at present widely established on the market, they should be dealt with in a future revision of this standard; ? the mechanical characteristics of PTO drive shafts, overrun devices and torque
26、limiters; ? general hazards which are dealt with in EN 1553 (see introduction). Environmental aspects have not been considered in this standard. This document is not applicable to PTO drive shafts and their guards which are manufactured before the date of publication of this document by CEN. 2 Norma
27、tive references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of
28、 any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 292-1:1991, Safety of machinery Basic concepts, general principles for design
29、Part 1: Basic terminology, methodology. EN 292-2:1991, Safety of machinery Basic concepts, general principles for design Part 2 : Technical principles and specifications (including amendment A1:1995). EN 294:1992, Safety of machinery Safety distance to prevent danger zones being reached by the upper
30、 limbs. EN 1070: 1998, Safety of machinery Terminology. EN 12965:2009 (E) EN 1152, Tractors and machinery for agriculture and forestry Guards for power take-off (PTO) drive shafts Wear and strength tests. ISO 5673:1993, Agricultural tractors and machinery Power take-off drive shafts and position of
31、power-input connection. ISO 11684:1995, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment Safety signs and hazard pictorials General principles. 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 1070:1998 and I
32、SO 5673:1993 and the following apply. 3.1 restraining system part of the PTO drive shaft guard which prevents rotation of the guard when the PTO drive shaft rotates NOTESee Figure 1a 14 - only shown as an example. 3.2 wide-angle universal joint constant-velocity joint allowing operation with an arti
33、culation generally higher than 50 NOTESee Figure 1b ?9? - only shown as an example. 3.3 overrun device device that permits the transmission of motion only in one direction (from the tractor towards the recipient machinery). See Figure 2 NOTEIt is normally used with recipient machine having high valu
34、e inertia. 3.4 torque limiter device that cuts or limits the transmission of motion between tractor and recipient machinery, when the torque reaches a prefixed value. See Figure 3 - - EN 12965:2009 (E) Figure 1a Figure 1b Key 1Power take-off (PTO)10 Guard cone 2Power-input connection (PIC)11 Guard t
35、ube 3PTO yoke12 Guard bearing 4PIC yoke13 Separate guard of wide angle universal joint 5End of inner yoke of universal joint14 Restraining system 6Universal joint15 PTO drive shaft guard 7Double yoke16 PTO wide-angle drive shaft guard 8End of double yoke of outer joint 9Wide-angle universal joint Fi
36、gure 1 Parts of drive shaft and guard - - EN 12965:2009 (E) Key 1PIC 2Overrun device Figure 2 Example of overrun device Key 1PIC 2Torque limiter Figure 3 Example of torque limiter EN 12965:2009 (E) 4 Requirements and/or safety measures 4.1 General requirements The PTO drive shafts and their guards s
37、hall comply with the safety requirements and/or protective measures of this clause. In addition, the machine shall be designed according to the principles of EN 292 for hazards relevant but not significant, which are not dealt with by this standard (e.g. thermal hazards). The list of significant haz
38、ards dealt with in this standard is given in annex A. Annex A also indicates the hazards which have not been dealt with. The manufacturer shall provide data in the instruction handbook (see 6.1) defining the limiting use that can be made of the drive shaft and its guards. This shall include operatin
39、g data and warnings against misuse (see 6.2). The guard shall be designed to prevent contact with the moving components of the drive shaft whilst the drive shaft being operated in accordance with the instruction handbook and whilst the drive shaft being connected in the appropriate way between a tra
40、ctor or self-propelled machine and a recipient machine. The outside parts of the guard shall not turn with the transmission shaft. The guard shall comply with acceptance criteria of EN 1152. The locking system of the PTO yoke (see Figure 1a and Figure 1b) shall have no point which can cause entangle
41、ment (e.g. by collar design). If there is a torque limiter and/or an overrun device on the drive shaft it shall be positioned only on the PIC side of the drive shaft as shown in Figures 2 and 3. Relevant marking shall be provided. Unless otherwise specified in this standard, all the apertures and sa
42、fety distances shall comply with the requirements of Tables 1, 3, 4 and 6 of EN 294:1992. Warnings shall be provided on the guards specifying the necessity to read the instruction handbook. 4.2 Universal joint The guard shall cover the drive shaft at least up to the end of the inner yoke of the univ
43、ersal joint (see Figure 1a and Table 1 for dimension c in Figure 4). Table 1 Maximum distance between the end of the PTO drive shaft guard and the axis of the locking device Dimensions in millimetres PTO typec (maximum) 173 261 388 NOTEDimension c is under study by CEN/TC 144/WG 1. - - EN 12965:2009
44、 (E) Key 1Master shield of tractor power take-off (PTO) 2Axis of locking device Figure 4 Guarding of universal joints on PTO drive shafts on tractor side (side view). 4.3 Wide-angle universal joint The drive shaft shall be guarded in the straight-line position at least up to the end of the outer joi
45、nt of the double yoke (see Figure 1b and Table 1 dimension c in Figure 5). Dimensions in millimetres Key 1Master shield of tractor power take-off (PTO) 2Axis of locking device Figure 5 Guarding of joints EN 12965:2009 (E) When a wide-angle joint is guarded by means of a separate guard independent of
46、 the guard of the other parts of the drive shaft (see Figure 1b), the guarding of this wide-angle joint shall be ensured as follows: at the maximum angular position of the rotating drive shaft, as specified by the manufacturer in the instruction handbook, the opening resulting from the angular movem
47、ent shall not be more than 30 mm (see Figure 6). This requirement is verified by the use of a 31 mm diameter rod. If the rod can be inserted into the opening without being in contact with the guards on both sides then the opening is too large to be acceptable; and an overlap between the separate gua
48、rd and the guard cone shall be given viewed perpendicular to the axis of the drive shaft assembly when in the maximum angular position (see Figure 6); and the overlap between the separate guard and the guard cone shall be at least 50 mm with the drive shaft in the straight-line position (see Figure 5). Where the gap between the shaft guard and the wide angle guard does not exceed 4 mm at any angular position up to the maximum, then the 50 mm overlap may be reduced to 10 mm in the straight-line position. Dimensions in millimetres Key 1Maximum joint angle 2Checking gauge ? 31 Fig