1、BRITISH STANDARD BS4742-5: 1985 ISO5669:1982 Hydraulic equipment for agricultural machinery Part5: Specification for dimensions of braking cylinders for trailers and trailed equipment ISO title: Agricultural trailers and trailed equipment Brakingcylinders Specifications UDC 631.372:629.114.2578.4BS4
2、742-5:1985 This British Standard, having been prepared under the directionof the Agricultural Machinery and Implements Standards Committee, was published under the authority ofthe Board of BSI and comesintoeffect on 29November1985 BSI 09-1999 The following BSI references relate to the work on this s
3、tandard: Committee reference AGE/25 Draft for comment 82/72006 DC ISBN 0 580 14698 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Agricultural Machinery and Implements Standards Committee (AGE/-) to Technical Committee AGE/25, upon wh
4、ich the following bodies were represented: Agricultural Engineers Association Association of Hydraulic Equipment Manufacturers British Agricultural and Garden Machinery Association Ltd. Ministry of Agriculture, Fisheries and Food National Farmers Union National Institute of Agricultural Engineering
5、Amendments issued since publication Amd. No. Date of issue CommentsBS4742-5:1985 BSI 09-1999 i Contents Page Committees responsible Inside front cover National foreword ii 0 Introduction 1 1 Scope and field of application 1 2 References 1 3 Definitions 1 4 Specifications 1 5 Dimensions 1 Figure 1 Fi
6、xing on a plate 2 Figure 2 Fixing with a side fastening 3 Figure 3 Pedestal articulation 4 Figure 4 Forked shaft 4 Figure 5 Smooth ended shaft 5 Table Dimensions of the different shafts in the form of a fork 5 Publications referred to Inside back coverBS4742-5:1985 ii BSI 09-1999 National foreword T
7、his British Standard, which has been prepared under the direction of the Agricultural Machinery and Implements Standards Committee, is identical with ISO5669:1982 (as corrected in1984) “Agricultural trailers and trailed equipment Braking cylinders Specifications” published by the International Organ
8、ization for Standardization (ISO). Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is
9、drawn especially to the following. The comma has been used as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Stand
10、ard”. Cross-references. The Technical Committee has reviewed the provisions of ISO1179 and ISO6149, to which reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A British Standard does not purport to include all the necessary provisions
11、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, pagesi andii, pages1 to6, an inside ba
12、ck 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.BS4742-5:1985 BSI 09-1999 1 0 Introduction This International Standard aims to reduce the number of types o
13、f hydraulic cylinders used to control the brakes of agricultural trailers and trailed equipment. 1 Scope and field of application This International Standard specifies the main interchangeability dimensions for compensator and articulated hydraulic cylinders capable of activating mechanically contro
14、lled brakes fixed to the axles of agricultural trailers and trailed equipment. NOTEThe correct operation of the braking unit requires the presence of one or more recall springs. 2 References ISO1179, Pipe connections for plain end steel and other metal tubes in industrial applications. ISO6149, Hydr
15、aulic and pneumatic transmissions Coupling holes Metric series. 3 Definitions For the purpose of this International Standard, the following definitions apply. 3.1 compensator cylinder cylinder which is rigidly fixed to the chassis of the vehicle by means of a plate or side fastening and the shaft of
16、 which has a compensator acting on the brake levers by means of cables 3.2 articulated cylinder cylinder which rotates about a fixing axis perpendicular to the shaft 4 Specifications 4.1 Bore or effective diameter of the cylinder The effective diameters of the cylinders shall be as follows: 20 0,5mm
17、 25 0,5mm 301mm 361mm 4.2 Stroke The stroke shall be not less than100mm. 4.3 Coupling port The coupling port shall have a thread G1/4, conforming to ISO1179, or M14 1,5 conforming to ISO6149. 5 Dimensions 5.1 Compensator cylinders 5.1.1 Fixing on a plate The dimensions for fixing the compensator cyl
18、inders on a plate shall be as shown in Figure 1. 5.1.2 Fixing with a side fastening The dimensions of the side fastening of the compensator cylinders shall be as shown in Figure 2.BS4742-5:1985 2 BSI 09-1999 NOTEThe compensator shown is only an example. Figure 1 Fixing on a plateBS4742-5:1985 BSI 09
19、-1999 3 Figure 2 Fixing with a side fasteningBS4742-5:1985 4 BSI 09-1999 5.2 Articulated cylinders The articulation of the pedestal is the same for all bores. The dimensions shall be as shown in Figure 3. There are two options for the shaft, as described in5.2.1 and5.2.2. 5.2.1 Articulated cylinder
20、forked shaft The dimensions of the forked shaft of the articulated cylinders shall be as shown in Figure 4 and given in the table. 5.2.2 Articulated cylinder smooth ended shaft The dimensions of the smooth ended shaft of the articulated cylinders shall be as shown in Figure 5. Figure 3 Pedestal arti
21、culation Figure 4 Forked shaftBS4742-5:1985 BSI 09-1999 5 Table Dimensions of the different shafts in the form of a fork Dimensions in millimetres Bore e p d 20 25 25 25 30 25 36 28 Figure 5 Smooth ended shaft 10 +1 0 8 +1 0 10 +1 0 8 +1 0 12 +1 0 10 +1 0 14 +1,5 0 14 +1 06 blankBS4742-5:1985 BSI 09
22、-1999 Publications referred to See national forewordBS4742-5: 1985 ISO5669:1982 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the internati
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