www bzfxw com BRITISH STANDARD BS EN 1152 1995 Tractors and machinery for agriculture and forestry — Guards for power take off (PTO) drive shafts — Wear and strength tests The European Standard EN 115[.]
BRITISH STANDARD Tractors and machinery for agriculture and forestry — Guards for power take-off (PTO) drive shafts — Wear and strength tests The European Standard EN 1152:1994 has the status of a British Standard UDC 621.824.4:631.372:629.114.2 BS EN 1152:1995 BS EN 1152:1995 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 February 1995 © BSI 05-1999 The following BSI references relate to the work on this standard: Committee reference AGE/6 Draft for comment 93/712022 DC ISBN 580 23638 Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standard Finland Suomen Standardisoimisliito, r.y France Association franỗaise de normalisation Germany Deutsches Institut fỹr Normung e.V Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portuguès da Qualidade Spain Asociación Espola de Normalización y Certificación Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd No Date Comments BS EN 1152:1995 Contents Cooperating organizations National foreword Foreword Text of EN 1152 National annex NA (informative)Committees responsible © BSI 05-1999 Page Inside front cover ii Inside back cover i BS EN 1152:1995 National foreword This British Standard has been prepared under the direction of the Engineering Sector Board and is the English language version of EN 1152:1994 Tractors and machinery for agriculture and forestry — Guards for power take-off (PTO) drive shafts — Wear and strength tests, published by the European Committee for Standardization (CEN) This standard supersedes BS 3417-2:1984 (1990) which is withdrawn A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages to 8, an inside back cover and a back cover This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover ii © BSI 05-1999 EUROPEAN STANDARD EN 1152 NORME EUROPÉENNE June 1994 EUROPÄISCHE NORM UDC 621.824.4:631.372:629.114.2 Descriptors: Agricultural machinery, agricultural tractors, forest equipment, driveshaft, cardan shafts, safety devices, safety of machines, tests, wear tests, wear resistance, mechanical strength, durability English version Tractors and machinery for agriculture and forestry — Guards for power take-off (PTO) drive shafts — Wear and strength tests Tracteurs et matériels agricoles et forestiers — Protecteurs d’arbres de transmission cardans de prise de force — Essais d’usure et de résistance Traktoren und Maschinen für die Land- und Forstwirtschaft — Schutzeinrichtungen für Gelenkwellen — Verschlei§prüfungen und Festigkeitsprüfungen ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ This European Standard was approved by CEN on 1994-06-16 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 Central Secretariat 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 Central Secretariat has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1994 Copyright reserved to CEN members Ref No EN 1152:1994 E EN 1152:1994 Foreword In November 1991, the draft standards ISO/DIS 5674-1 Tractors and machinery for agriculture and forestry — Guards for power take off (PTO) drive-shafts — Test methods and requirements — Part 1: Strength test and ISO/DIS 5674-2 Tractors and machinery for agriculture and forestry — Guards for power take off (PTO) drive shafts — Test methods and requirements — Part 2: Wear test were submitted, at the CEN/TC 144, Tractors and machinery for agriculture and forestry, request, to the Primary Questionnaire procedure After analysis of the procedure results, BTS requested CEN/TC 144 to prepare, with a view to submitting it to formal vote, a draft standard based on ISO 5674-1:1992 and ISO 5674-2:1992 and taking into account the comments worded by the CEN Member Committees during these procedures, particularly to be in accordance with the Essential Safety Requirements of the Machinery Directive This European Standard 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) 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 December 1994, and conflicting national standards shall be withdrawn at the latest by December 1994 In accordance with the CEN/CENELEC Common Rules, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom Contents Foreword Scope Definitions Test conditions Wear test Strength tests Acceptance criteria Test report Annex A (informative) Form of test report Figure — Radial load test of cone Figure — Impact test Table — Fineness of grinding Page 3 3 5 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ © BSI 05-1999 EN 1152:1994 Scope Test conditions This European Standard specifies the test methods and acceptance criteria for determining resistance against wear, robustness and durability of non-rotating guards for power take-off (PTO) drive shafts as defined in clause Pending the results of work being conducted in European Committee for Standardization level on this subject matter, the requirements and test methods relative to the ultraviolet radiation resistance of such guards when they are manufactured in plastics materials are not dealt with in this standard Such equipment is part of world-wide trade, which implies re-export of PTO drive-shafts to countries with extreme temperatures, therefore a temperature of – 35 °C has been specified for some tests 3.1 The guard shall be taken from production and be within the tolerances shown on production drawings The operating and maintenance instructions shall be complied with as described by the manufacturer The guard shall be restrained from rotating during the tests The guard shall be tested in conjunction with a PTO drive-shaft of m closed length (as defined in 2.2) for which it is intended The results obtained from a sample shall be presumed valid for guards of shorter and longer length The same guard shall be used throughout the test The guard shall be subjected to the appropriate tests given in clauses and following the test sequence given After each test, note and record the condition of the guard with particular reference to any fractures, permanent deformation or detachments of components Maintenance operations shall not be made between the wear test and the strength tests 3.2 Unless otherwise specified the test shall be carried out at an ambient temperature between °C and 35 °C 3.3 Where a test procedure requires the shaft to be rotated, the rotational frequency shall be 000 min–1 Definitions For the purposes of this European Standard, the following definitions apply: 2.1 power take-off (PTO) drive-shaft ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ shaft with universal joints that connects the power take-off of a self-propelled machine or a tractor to the first fixed bearing of a recipient machine 2.2 closed length (of shaft) distance between the centres of the outermost cross-assemblies, when the PTO drive shaft is fully closed 2.3 extended length (of shaft) distance between the centres of the outermost cross-assemblies, when the PTO drive shaft is extended to the maximum length recommended by the manufacturer 2.4 non-rotating PTO drive-shaft guard PTO drive shaft guard held stationary while the shaft is rotating © BSI 05-1999 Wear test 4.1 Test equipment 4.1.1 The wear test equipment shall consist of a cabinet capable of holding the PTO drive-shaft and its guard horizontal, and of rotating the PTO drive-shaft at a frequency of 000 min–1 The size and shape of the cabinet shall be such that an even distribution of the spray of salt-water solution or dust is ensured The upper parts of this cabinet shall be shaped so that drops of sprayed solution which accumulate on them not fall onto the PTO drive-shaft guard 4.1.2 When the tests require the use of water, the water shall be potable 4.1.3 The dust shall consist of a mixture composed of equal parts, by mass, of organic and mineral dust 4.1.3.1 The organic dust shall be ground lucerne with a maximum percentage of 12 % water and with a maximum particle size of mm EN 1152:1994 4.1.3.2 The mineral dust shall be a simple phosphated fertilizer This product is obtained during the production of steel, by the treatment of steel or of phosphorous cast iron It contains, as principal elements, the silicophosphates of calcium having the following characteristics: — minimum content: 12 % of P205 total; — other: 75 % at least of the P205 total declared shall be soluble in % concentration of citric acid Table — Fineness of grinding Sieve mesh Minimum percentage of undersize by mass mm (%) 0,16 > 75 0,63 > 96 4.1.4 When using salt-water solution, it shall be prepared by dissolving sodium chloride in water to produce a concentration of 50 g/l ± g/l The sodium chloride shall be white and shall give a colourless solution in water It shall be substantially free from copper and nickel, and shall not contain more than 0,1 % of sodium iodine and not more than 0,4 % of total impurities calculated for dry salt The solution shall be filtered before it is used in the test in order to remove any solid matter which might block the apparatus of the spraying device 4.2 Wear test procedure 4.2.1 During a complete test, the guard with the shaft is operated for 290 h 4.2.2 During operation in the test sequence described in 4.2.3, the shaft shall be rotated and, while rotating, shall be extended to its maximum length for of each cycle and held at its minimum length for the other 4.2.3 The test consists of the following four parts: a) for 120 h, operate in alternating 24 h cycles at 85 °C ± °C and at ambient temperature, commencing with a cycle at 85 °C Immediately before commencing the next part of the test, immerse the PTO drive-shaft with guard in water (see 4.1.2), remove from the water and allow any water which may run off under gravity to so for with the guard horizontal and at its minimum length; b) for 120 h, operate at ambient temperature in an atmosphere containing 0,5 kg/m3 of dust (see 4.1.3); c) for h, operate at ambient temperature in an atomized solution of salt-water (see 4.1.4) sprayed at a rate of x 10-5 m3/s per m2 After the h of operating, leave the PTO drive-shaft with guard, stationary for 46 h; d) for 48 h, operate at ambient temperature 4.2.4 Before the start and at the end of the test described in 4.2.3 measure the torque which needs to be applied to each guard end in order to immobilize it while the shaft rotates at 000 min–1 Strength tests 5.1 Axial loading test at ambient temperature 5.1.1 With the PTO drive-shaft and guard stationary, apply an axial force of 250 N between the cone and the tube in both directions Gradually apply the force and then hold for 60 s If the cones, or method of attaching them to the tubes, are not the same, each cone end shall be tested 5.1.2 With the PTO drive-shaft and guard stationary, apply an axial force of 000 N for 60 s between each guard tube and the drive-shaft Apply the force in both directions 5.2 Radial loading test at ambient temperature 5.2.1 Support the guarded PTO drive-shaft in a horizontal, straight line by its usual end connections, extended to the maximum length recommended by the manufacturer 5.2.2 Rotate the PTO drive-shaft and, using a smooth flat 100 mm wide wooden beam, apply a direct load of 500 N for 60 s at right-angles to the shaft-guard at its mid-point To avoid excessive vibration, the wooden beam shall be supported by a 20 mm thick rubber backing of approximately A/20 Shore hardness (see Figure 1) When applying the load, care shall be taken to ensure that no impact load is applied 5.2.3 Rotate the PTO drive-shaft and, using the wooden beam described in 5.2.2, apply a direct force of 500 N to the cone over the centre of the articulation of the universal joint, when in line with the PTO drive-shaft, for 60 s as shown in Figure The force shall be applied perpendicular to the PTO drive-shaft If the method of attachment of the guard to the shaft is not identical at each end, then test both ends 5.2.4 Record whether any additional part of the shaft was no more guarded during or after the test ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 5.3 Axial loading test at freezing temperature 5.3.1 Lower the temperature to – 35 °C and maintain the PTO drive-shaft and guard at that temperature for h © BSI 05-1999 EN 1152:1994 Figure — Radial load test of cone 5.3.2 With the PTO drive-shaft and guard stationary and at – 35 °C, apply an axial force between the guard tube and the PTO drive-shaft in both directions The force shall be: a) 2,5 kN if the inner diameter of the outer guard tube is less than or equal to 80 mm; b) 3,5 kN if the inner diameter of the outer guard tube is more than 80 mm If the method of attachment of the guard to the shaft is not the same at each end, each end shall be tested ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 5.4 Impact test at freezing temperature 5.4.1 Support the PTO drive-shaft and guard in a horizontal straight line by their usual end connections, extended to the maximum length recommended by the manufacturer 5.4.2 Maintain the PTO drive-shaft and guard at – 35 °C for h 5.4.3 With PTO drive-shaft and guard at – 35 °C, strike three blows as follows: a) one on the cone over the centre of articulation of the universal joint when in line with the PTO drive-shaft (the position of the end yoke being such that the face of the yoke is parallel to the contact face see Figure 2); b) one midway along one of the tubes; c) one at the midpoint of the overlap of the tubes The blows shall be struck by using a pendulum, so that the impact energy is 98 J The contact face shall be flat and have a diameter of 50 mm (see Figure 2) © BSI 05-1999 Figure — Impact test 5.5 Restraining member test at ambient temperature 5.5.1 Apply a force of 400 N to each fitted restraining member The force shall be applied tangentially as well as radially, in a plane perpendicular to the axis of the PTO drive-shaft 5.5.2 Record any functional failure of the restraining member or opening of the fixing hooks, and any fracture or crack of the guard or detachment of the guard component Acceptance criteria The PTO drive-shaft guard is deemed to have passed the wear and strength tests if: a) before and after the wear test, the torque required for the immobilization of any part of the guard when the shaft rotates is not greater than 2,5 Nm; b) the guard has no holes or deformation caused by wear during the tests, which leave the shaft unprotected on the parts formerly protected; c) the guard has no breakage, crack, part separation Cracks caused by the edge of blow pendulum (see 5.4) are admissible; EN 1152:1994 d) the guard did not move on the shaft with reference to its initial position; e) the restraining member(s), not show any permanent deformation or breakage of connecting point impairing its (their) function Test report The test report shall include the following information: a) details of PTO drive-shaft guard, including identification marks for the guard and the PTO drive-shaft; b) the torque in Nm, before the start and at the end of the wear test, needed to immobilize each guard tube when the shaft rotates (see 4.2.4); c) condition of the guard after each test (see 3.1); d) results of axial loading test at ambient temperature (see 5.1); e) results of radial loading test at ambient temperature (see 5.2); f) results of axial loading test at freezing temperature (see 5.3); g) results of impact test at freezing temperature (see 5.4); h) result of restraining member test at ambient temperature (see 5.5); i) statement of whether the guard meets the requirements of clause NOTE ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ A typical test report is shown in Annex A © BSI 05-1999 EN 1152:1994 Annex A (informative) Form of test report (see clause 7) © BSI 05-1999 EN 1152:1994 © BSI 05-1999 BS EN 1152:1995 National annex A (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Engineering Sector Board to Technical Committee AGE/6, upon which the following bodies were represented: Agricultural and Allied Workers National Trade Group Agricultural Engineers’ Association British Agricultural & Garden Machinery Association Ltd Department of Transport Forestry Commission Health and Safety Executive Ministry of Agriculture, Fisheries and Food National Farmers’ Union Silsoe Research Institute United Kingdom Softwood Sawmillers’ Association © BSI 05-1999 BS EN 1152:1995 BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions It is the constant aim of BSI to 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