1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21827-0 SANS 13929:2008 Edition 1 ISO 13929:2001 Edition 1SOUTH AFRICAN NATIONAL STANDARD Small craft Steering gear Geared link systems Th
4、is national standard is the identical implementation of ISO 13929:2001, and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 fax: +27 12 344 1568
5、 www.sabs.co.za SABS This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 13929:2008 Edition 1 ISO 13929:2001 Edition 1 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS
6、 TC 188, Small craft, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in July 2008. This standard may only be used and printed by approved subscription and freemailing clients of the SABS.Reference nu
7、mber ISO 13929:2001(E) ISO 2001 INTERNATIONAL STANDARD ISO 13929 First edition 2001-01-15 Small craft Steering gear Geared link systems Petits navires Appareils gouverner Transmissions engrenages SANS 13929:2008This standard may only be used and printed by approved subscription and freemailing clien
8、ts of the SABS.ISO 13929:2001(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the ed
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11、t the address given below. ISO 2001 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address bel
12、ow or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland ii ISO 2001 All rights reserved SANS 13929:2008This standard may only be used and p
13、rinted by approved subscription and freemailing clients of the SABS.ISO 13929:2001(E) ISO 2001 All rights reserved iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Sta
14、ndards 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 organizations, governmental and non-governmental, in liaison with ISO, also
15、take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted
16、 by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subj
17、ect of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 13929 was prepared by Technical Committee ISO/TC 188, Small craft. SANS 13929:2008This standard may only be used and printed by approved subscription and freemailing clie
18、nts of the SABS.SANS 13929:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.INTERNATIONAL STANDARD ISO 13929:2001(E) ISO 2001 All rights reserved 1 Small craft Steering gear Geared link systems 1 Scope This International Standard specifies t
19、he minimum level of requirements for construction, operation and installation of geared link steering systems on all types of small craft of hull length up to 24 m. It excludes steering systems covered by ISO 8848 and ISO 9775. 2 Terms and definitions For the purposes of this International Standard,
20、 the following terms and definitions apply. 2.1 geared link system system in which rotation of the steering wheel positions the rudder blade by means of gearboxes, which converts the rotary motion to a push/pull force on the rudder operating lever, via a draglink assembly 2.2 draglink component link
21、ing the rack operating lever to the rudder operating lever, which transmits the push and pull forces and allows rotational and angular misalignment 2.3 rudder operating lever component fixed to the rudder, transmitting the torque to the rudder shaft from the steering system 2.4 rack operating lever
22、component fixed to the shaft of a steering system which rotates in relationship to movement of the steering wheel and achieves a corresponding movement of the rudder operating lever via the draglink 2.5 maximum output force force that the system can supply upon application of a 450 N force tangentia
23、lly to the wheel SANS 13929:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 13929:2001(E) 2 ISO 2001 All rights reserved 3 Illustration of a geared link steering system Figure 1 shows a geared link system and remotely mounted direct lin
24、k system. Figure 1 Geared link system and remotely mounted direct link system SANS 13929:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 13929:2001(E) ISO 2001 All rights reserved 3 4 Constructional requirements 4.1 General 4.1.1 Steeri
25、ng rating The steering system type shall be rated according to both its maximum permissible output torque and the corresponding rudder torques produced both at rudder midships and full lock. The manufacturers specification for the maximum permissible output torque shall be used to determine the tang
26、ential torque tests as specified in 6.3. 4.1.2 Fasteners All threaded fasteners whose integrity affects safe operation of the steering system shall be provided with a means for locking. 4.1.3 Materials The choice and combination of materials shall be such as to minimize the risk of corrosion and gal
27、vanic action. 4.2 Specific 4.2.1 Rudder angle The steering system manufacturer shall specify the maximum rudder angle. 4.2.2 Compass interference Materials used in the various components of the steering system as supplied shall not affect the accuracy and reliability of a compass mounted on the pede
28、stal, if used, whatever the steering angle may be. 4.2.3 Draglink The construction of the draglink shall be such that it will allow 20 mm of length adjustment and a minimum of 15 angular misalignment. Means shall be provided to secure the draglink after adjustments (see Figure 2). Where the rudder l
29、ever and the operating lever are in the same plane and there is no angular misalignment, a clevis fitting is permissible. SANS 13929:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 13929:2001(E) 4 ISO 2001 All rights reserved Key 1 Drag
30、link 2 Locknut a 20 mm adjustment Figure 2 Draglink 4.2.4 Rudder/rack operating levers The ratio of the operating lengths of the rudder and rack operating levers shall be arranged to ensure that the rack operating lever travels 65 , as a maximum, from neutral in either direction to achieve full rudd
31、er travel (see Figure 3). The method of attaching the rudder operating lever shall withstand 150 % of the torque. Key 1 Rudder operating lever 2 Rack operating lever 3 Centreline of yacht 4 Maximum permissible operating angle 130 5 Full rudder travel Figure 3 Rudder/rack operating lever SANS 13929:2
32、008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 13929:2001(E) ISO 2001 All rights reserved 5 4.2.5 Fastening The system components shall be designed to allow for secure fastening to the boat structure. 5 Installation requirements 5.1 Fas
33、tening To ensure the proper operation of a steering system, all components shall be securely fastened to the structure of the craft, which should be reinforced as necessary. Threaded fasteners which may be expected to be disturbed by installation or adjustment procedures, whose integrity affects ope
34、ration of the system such that separation or loss of the fasteners would cause sudden loss of steering without warning shall a) be referenced by instructions for correct assembly, and b) be locked by a device whose presence is determined by visual inspection or by feel following the assembly, or inc
35、orporate integral locking means, provided the fastener cannot be omitted, or substituted for, without making the system inoperable. NOTE Self-locking nuts with plastic inserts which create mechanical plastic interference meet the requirements of this subclause. 5.2 Rudder stops Stops shall be fitted
36、 to ensure that the maximum rudder angle specified by the steering system manufacturer is not exceeded. NOTE The rudder stops may operate on the rudder operating lever, an independent lever attached to the rudder stock, or the rack operating lever or the rudder itself. The strength of the rudder sto
37、ps shall be adequate to withstand 150 % of the specified maximum output force at full lock of the steering type as specified in 4.1.1 (see Figure 4). Key 1 Full rudder travel Figure 4 Rudder stops SANS 13929:2008This standard may only be used and printed by approved subscription and freemailing clie
38、nts of the SABS.ISO 13929:2001(E) 6 ISO 2001 All rights reserved 5.3 Connection of gearboxes Where the helm or pedestal is mounted remotely from the rudder operating lever, the gearboxes shall be connected via universal joints and solid linkages. 6 Tests of steering system 6.1 General The whole stee
39、ring system shall withstand the tests described in 6.2 and 6.3 without fracture or permanent distortion of any component. 6.2 Axial force test Apply a push-pull force of 670 N over any 100 mm span for 10 cycles of at least 5 s duration, at any point on the outer wheel rim or the centre of the handgr
40、ip of an external spoke for the manufacturers specified largest wheel diameter, in a direction parallel to the centreline of the wheel shaft (see Figure 5). Figure 5 Axial force test 6.3 Torque test With the rudder shaft fixed to prevent rotation and at its maximum operating angle, but with the oper
41、ating levers not against a stop, apply a force of 150 % of rated maximum output torque for 10 cycles of at least 5 s duration via the steering wheel shaft (see Figure 6). SANS 13929:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 13929:
42、2001(E) ISO 2001 All rights reserved 7 Figure 6 Tangential torque test 7 Marking Steering systems complying with this International Standard shall be marked with the following information: number of this International Standard; name of manufacturer; model type. 8 Manuals 8.1 Owners manual An owners
43、manual shall be provided with the system and include a general description of the principle of operation, and specific precautions critical for correct operation. 8.2 Installers manual An installation manual shall be provided with the system and shall include at least the following information: refe
44、rence of the model type and identification of basic components; largest wheel diameter; general description of operation and reference to specification of rating; installation instructions; recommended installation test procedures; general description of rudder stop installations to meet the require
45、ments of 4.2; exploded or sectioned diagram showing parts with identification numbers and description; SANS 13929:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 13929:2001(E) 8 ISO 2001 All rights reserved maintenance procedures and pe
46、rmissible adjustments; name of manufacturer; model type; maximum permissible output torque; maximum corresponding rudder force at midships and full lock. SANS 13929:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 13929:2001(E) ISO 2001
47、All rights reserved 9 Bibliography 1 ISO 8848:1990, Small craft Remote steering systems. 2 ISO 9775:1990, Small craft Remote steering systems for single outboard motors of 15 kW to 40 kW power. SANS 13929:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.
