EN 12965:2019
(Main)Tractors and machinery for agriculture and forestry - Power take-off (PTO) drive shafts and their guards - Safety
Tractors and machinery for agriculture and forestry - Power take-off (PTO) drive shafts and their guards - Safety
This document specifies safety requirements and their verification for the design and construction of power take-off (PTO) drive shafts and their guards linking a tractor or self-propelled machinery to the first fixed bearing of recipient machinery. It describes methods for the elimination or reduction of risks which need specific requirements including such risks arising from misuse, reasonably foreseeable by the manufacturer. It is applicable only to those PTO drive shafts and guards mechanically linked to the 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 document does not deal with:
- the guards totally covering, but not mechanically linked to, the PTO drive shaft;
- the mechanical characteristics of PTO drive shafts, overrun devices and torque limiters;
- general hazards which are dealt with in EN ISO 4254-1:2015 (see introduction).
Environmental aspects have not been considered in this document.
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.
Traktoren und Maschinen für die Land- und Forstwirtschaft - Gelenkwellen und ihre Schutzeinrichtungen - Sicherheit
Dieses Dokument enthält sicherheitstechnische Anforderungen und deren Überprüfung für die Gestaltung und Konstruktion von Gelenkwellen und ihren Schutzeinrichtungen, die für die Verbindung zwischen einem Traktor oder einer selbstfahrenden Maschine und dem ersten festen Lager der angetriebenen Maschine bestimmt sind. Es beschreibt Maßnahmen zur Beseitgung oder Verminderung von Gefährdungen, für die spezifische Anforderungen benötigt werden, einschließlich Risiken aus Fehlanwendung, die vom Hersteller vernünftigerweise vorhersehbar sind. Es gilt nur für solche Gelenkwellen und Schutzeinrichtungen, die mechanisch mit der Gelenkwelle über mindestens zwei Lager verbunden sind. Bei Verwendung mit kompatiblen Schutzeinrichtungen für die Zapfwelle (PTO, en: power take-off) des Traktors (Schutzschild, en: Master shield) oder der selbstfahrenden Maschine und der Geräteantriebswelle (PIC, en: power input connection) der angetriebenen Maschine sind die Anforderungen an die Gelenkwellen vollständig.
ANMERKUNG 1 Vollständig umschließende PIC-Schutztrichter allein bieten vollständigen Schutz.
ANMERKUNG 2 ISO 500-1 und ISO 500-2 enthalten Anforderungen für den Schutz von Traktorzapfwellen und ISO 4254-1 enthält Anforderungen für Geräteantriebswellen (PIC) von angetriebenen Maschinen, die mit dem in diesem Dokument geforderten Schutz kompatibel sind.
Zusätzlich legt es fest, welche Informationen über sicheres Arbeiten vom Hersteller zur Verfügung zu stellen sind.
Dieses Dokument behandelt nicht:
Schutzeinrichtungen, die die Gelenkwelle vollständig umschließen, jedoch nicht mechanisch mit ihr verbunden sind;
die mechanischen Eigenschaften von Gelenkwellen, Freiläufen und Drehmomentbegrenzern;
allgemeine Gefährdungen, die in EN ISO 4254 1:2015 behandelt werden (siehe Einleitung);
Umweltaspekte wurden in dieser Norm nicht in Betracht gezogen.
Dieses Dokument gilt nicht für Gelenkwellen und ihre Schutzeinrichtungen, die hergestellt wurden, bevor dieses Dokuments von CEN veröffentlicht wurde.
Tracteurs et matériels agricoles et forestiers - Arbres de transmission à cardans de prise de force et leurs protecteurs - Sécurité
Le présent document spécifie les exigences de sécurité et leur vérification pour la conception et la construction des arbres de transmission à cardans de prise de force et leurs protecteurs reliant un tracteur ou une machine automotrice au premier palier fixe d’une machine réceptrice. Il décrit des méthodes pour l’élimination ou la réduction des risques qui nécessitent des exigences spécifiques, y compris les risques associés à un mauvais usage raisonnablement prévisible par le fabricant. Il s’applique uniquement aux arbres de transmission à cardans de prise de force et leurs protecteurs, liés mécaniquement à l’arbre par au moins deux paliers. Lorsqu’elles sont utilisées avec des protecteurs compatibles avec la prise de force du tracteur (bouclier protecteur) ou de la machine automotrice et l’arbre récepteur de la machine réceptrice de puissance, les exigences relatives aux arbres de transmission à cardans de prise de force sont complètes.
NOTE 1 Des cônes de protection entièrement fermés du côté arbre récepteur de la machine assurent à eux seuls une protection complète.
NOTE 2 L’ISO 500 1 et l’ISO 500 2 fournissent des exigences relatives à la protection des prises de force des tracteurs et l’ISO 4254 1 stipule des exigences relatives aux arbres récepteurs des machines réceptrices de puissance qui sont compatibles avec les protections exigées par le présent document.
En outre, le présent document spécifie le type d’informations que le fabricant doit fournir sur les pratiques d’utilisation sûre.
Le présent document ne traite pas :
- des protecteurs recouvrant totalement l’arbre de transmission à cardans de prise de force sans y être mécaniquement relié ;
- des caractéristiques mécaniques des arbres de transmission à cardans de prise de force, des systèmes de roue libre et des limiteurs de couple ;
- des phénomènes dangereux généraux qui sont traités dans l’EN ISO 4254 1:2015 (voir l’introduction).
Les aspects liés à l’environnement n’ont pas été pris en compte dans ce document.
Le présent document n’est pas applicable aux arbres de transmission à cardans de prise de force et leurs protecteurs qui ont été fabriqués avant la date de publication de ce document par le CEN.
Traktorji ter kmetijski in gozdarski stroji - Priključne gredi in njihova zaščita - Varnost
Ta evropski standard določa varnostne zahteve in njihovo potrjevanje pri projektiranju in izdelavi priključnih gredi (PTO) ter njihovih ščitnikov, ki povezujejo stroje z lastnim pogonom (ali traktorje) s prvim fiksnim ležajem prejemnega stroja. Opisuje metode za odpravljanje ali zmanjšanje tveganj s posebnimi zahtevami. Standard se uporablja le za priključne gredi in ščitnike, ki so mehansko priključeni na gred z vsaj dvema ležajema. Poleg tega določa vrsto podatkov glede varnih delovnih postopkov, ki jih mora zagotoviti proizvajalec. Ta standard ne obravnava: – ščitnikov, ki popolnoma pokrivajo priključno gred, vendar niso mehansko povezani z njo. Ker te naprave trenutno niso široko uveljavljene na trgu, naj bi bile obravnavane v prihodnji reviziji tega standarda; – mehanskih značilnosti priključnih gredi, naletnih naprav in omejevalnikov navora; – splošnih nevarnosti.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2020
Nadomešča:
SIST EN 12965:2004+A2:2009
Traktorji ter kmetijski in gozdarski stroji - Priključne gredi in njihova zaščita -
Varnost
Tractors and machinery for agriculture and forestry - Power take-off (PTO) drive shafts
and their guards - Safety
Traktoren und Maschinen für die Land- und Forstwirtschaft - Gelenkwellen und ihre
Schutzeinrichtungen - Sicherheit
Tracteurs et matériels agricoles et forestiers - Arbres de transmission à cardans de prise
de force et leurs protecteurs - Sécurité
Ta slovenski standard je istoveten z: EN 12965:2019
ICS:
65.060.01 Kmetijski stroji in oprema na Agricultural machines and
splošno equipment in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 12965
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2019
EUROPÄISCHE NORM
ICS 65.060.01 Supersedes EN 12965:2003+A2:2009
English Version
Tractors and machinery for agriculture and forestry -
Power take-off (PTO) drive shafts and their guards - Safety
Tracteurs et matériels agricoles et forestiers - Arbres Traktoren und Maschinen für die Land- und
de transmission à cardans de prise de force et leurs Forstwirtschaft - Gelenkwellen und ihre
protecteurs - Sécurité Schutzeinrichtungen - Sicherheit
This European Standard was approved by CEN on 16 September 2019.
CEN members are bound 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 CEN-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 has 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12965:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Safety requirements and/or measures . 9
5 Verification of safety requirements and/or measures . 14
6 Information for use . 23
Annex A (informative) List of significant hazards . 28
Annex B (informative) Procedure of how to put the test sample together . 31
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC amended by Directive 2009/127/EC
aimed to be covered . 36
Bibliography . 39
European foreword
This document (EN 12965:2019) has been prepared by Technical Committee 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 June 2020, and conflicting national standards shall be
withdrawn at the latest by December 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 12965:2003+A2:2009.
The main changes compared to the previous edition are as follows:
— precision of the general requirements;
— addition of PTO type 4;
— precision of the requirements for the restraining system;
— addition and precision of the requirements for service and maintenance;
— addition of requirements for the locking system;
— addition of an entanglement test;
— addition of new pictogram required to highlight compatibility of guarding systems of PTO drive
shaft with tractor and machinery.
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 EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this
document.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Introduction
This document is a type C standard as defined in EN ISO 12100:2010.
The machinery concerned and the 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 the other
standards, for machines that have been designed and built according to the provisions of this type C
standard.
Hazards that are common to agricultural machines (self-propelled, mounted, semi-mounted and
trailed) are dealt with in EN ISO 4254-1:2015. EN 12965 provides requirements for power take-off
(PTO) drive shafts in addition to those of EN ISO 4254-1.
This document is of relevance, in particular, for the following stakeholder groups representing the
market players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);
— health and safety bodies (regulators, accident prevention organizations, market surveillance, etc.).
Others can be affected by the level of machinery safety achieved with the means of the document by the
above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);
— machine users/employees (e.g. trade unions, organizations for people with special needs);
— service providers, e.g. for maintenance (small, medium and large enterprises);
— consumers (in case of machinery intended for use by consumers).
The above-mentioned stakeholder groups have been given the possibility to participate at the drafting
process of this document.
1 Scope
This document specifies safety requirements and their verification for the design and construction of
power take-off (PTO) drive shafts and their guards linking a tractor or self-propelled machinery to the
first fixed bearing of recipient machinery. It describes methods for the elimination or reduction of risks
that need specific requirements including such risks arising from misuse, reasonably foreseeable by the
manufacturer. It is applicable only to those PTO drive shafts and guards mechanically linked to the shaft
by at least two bearings. When used with compatible guards for power take-off (PTO) of the tractor
(master shield) or self-propelled machine and the power input connection (PIC) of the power receiving
machine, the requirements for power take-off drive shafts are complete.
NOTE 1 Fully enclosing PIC guard cones alone provide full protection.
NOTE 2 ISO 500-1 and ISO 500-2 give requirements for the guarding of tractor power take-offs (PTO) and
ISO 4254-1 gives requirements for power input connections (PIC) of power receiving machinery that are
compatible with the guarding required by this document.
In addition, it specifies the type of information on safe working practices to be provided by the
manufacturer.
This document does not deal with:
— the guards totally covering, but not mechanically linked to, the PTO drive shaft;
— the mechanical characteristics of PTO drive shafts, overrun devices and torque limiters;
— general hazards which are dealt with in EN ISO 4254-1:2015 (see introduction).
Environmental aspects have not been considered in this document.
This document is not applicable to PTO drive shafts and their guards that are manufactured before the
date of publication of this document by CEN.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 15811:2014, Agricultural machinery — Fixed guards and interlocked guards with or without guard
locking for moving transmission parts (ISO/TS 28923:2012 modified)
EN ISO 4254-1:2015, Agricultural machinery — Safety — Part 1: General requirements
(ISO 4254-1:2013)
EN ISO 5674:2009, Tractors and machinery for agriculture and forestry — Guards for power take-off
(PTO) drive-shafts — Strength and wear tests and acceptance criteria (ISO 5674:2004, corrected version
2005-07-01)
EN ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk
reduction (ISO 12100:2010)
EN ISO 13857:2008, Safety of machinery — Safety distances to prevent hazard zones being reached by
upper and lower limbs (ISO 13857:2008)
ISO 11684:1995, Tractors, machinery for agriculture and forestry, powered lawn and garden
equipment — Safety signs and hazard pictorials — General principles
ISO 1140:2012, Fibre ropes — Polyamide — 3-, 4-, 8- and 12-strand ropes
ISO 500-3:2014, Agricultural tractors — Rear-mounted power take-off types 1, 2, 3 and 4 — Part 3: Main
PTO dimensions and spline dimensions, location of PTO
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
power take-off (PTO) drive shaft
assembly consisting of two joints, telescopic members and a guard which is mechanically linked to the
shaft by at least two bearings used to transmit rotational power from the PTO of a tractor or self-
propelled machine to the PIC of an implement
Note 1 to entry: See Figure 1 - only shown as an example.
3.2
restraining system
part of the PTO drive shaft guard which prevents rotation of the guard when the PTO drive shaft rotates
Note 1 to entry: See Figure 1, key 28 - only shown as an example.
3.3
universal joint
mechanical device which can transmit torque and/or rotational motion
Note 1 to entry: See Figure 1, key 12 - only shown as an example.
3.4
wide-angle universal joint
mechanical device which can transmit torque and/or rotational motion at a constant velocity at fixed or
varying angles, generally equal or higher than 50°
Note 1 to entry: See Figure 1, key 16 - only shown as an example.
3.5
overrun device
device that permits the transmission of motion only in one direction (from the tractor towards the
recipient machinery)
Note 1 to entry: It is normally used with recipient machine having high value inertia.
3.6
torque limiter
device that cuts or limits the transmission of motion between tractor and recipient machinery, when
the torque reaches a prefixed value
Key
1 power take off shaft (PTO) 15 end of double yoke of outer joint
2 power-input connection (PIC) 16 wide-angle universal joint
3 PTO yoke bore 17 centre of articulation of wide-angle universal joint
4 PIC yoke bore 18 centre of outer joint
5 PTO yoke 19 guard cone
6 PIC yoke 20 wide angle guard cone
7 journal cross-assembly 21 guard bearing
8 inner yoke 22 guard tube
9 inner telescopic member 23 separate guard of wide angle universal joint
10 outer telescopic member 24 PTO drive shaft guard
11 end of inner yoke of universal joint 25 PTO drive shaft guard (in case of wide-angle PTO
drive shaft)
12 universal joint 26 PIC guard
13 PTO drive shaft, closed and extended length 27 locking system
14 double yoke
...
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