Bsi bs au 146b 1970 (2000)

BRITISH STANDARD AUTOMOBILE SERIES BS AU 146b 1970 Incorporating Amendment No 1 Specification for Standard automatic roller type coupling for semi trailers not exceeding 7 tons laden weight UDC 629 11[.]

Incorpora ting

Amend ment No 1

U C 6 9.1 0 3.5

This BritishStan ard, ha ing

b en a pro ed b the

Automo ileIn ustry Stan ards

Commite , was published

u derthe authority ofthe

Ex cutiv Bo rd of

theInstitutionon

1 Decemb r1 7

© BSI0 -2 0

The folowing BSI references

relate to the work on this

stan ard:

Commite reference A E/

-ISBN 0 5 0 0 3 5 0

This BritishStand rd, prep red u der the authority of the Automobie

Industry Stand ards Commit e of the BSI, was fir t publshed in19 8

Thepresent rev ision incorporates a d itional d ta consid ered neces ary as

aresult of ex erience g ained in the use of the stand rd , b amend ments to

Clauses1 and3.2 and to Fig ure 1 It super edes BS AU14 :19 8, which is

therefore withd rawn

It specifies certain b sic information for stand rd automatic roler-ty pe

couplng for con ection betwe n towing v ehicles and semi traier to as ist in

obtaining ma imum inter hang ea i ity betwe n v ehicles using this ty pe of

couplng

Detais of a roler-ty pe couplng for use with semitrai er f om7 tons

to14# tons la en weig ht are g iv en in BS AU3 , “ Sta nd a rd a utoma tic

rol l er -type coupl ing fr s mi-tr a il ers o 7 tons to14 " tons l a d en weight

NOT 1 Trailer man facturer , b fore a plying this stan ard, should asertain that the

dimensions of the towing ehicle are suita le.Op rator should v rify that towing v hicles an

semitrailer are mutualy suita le in al resp cts

NOT 2 If it is re uired to conv rt the fig ures in this stan ard fom imp rial u its into metric

u its it is recommen ed that the conv rion factor an the ta les contained in BS3 0,

“Conver sion fa ctors a nd ta ble”, b used.Attention is also drawn to BS2 5 ,“Pr ecision conver sion

of inch a nd metr ic size on en ine rin d r a win s”

A British Stand rd do s not purport to include al the neces ary prov isions of

a contract User of British Stand ard s are responsible for their cor ect

a pl cation

Compl anc with a British Standard does not of itselfconfer imm unity

f om leg al o l g ations

Sum m ary of pag es

This d ocument comprises a f ont cov er, an insid e font cov er, p g esi andi ,

p g e1 an a b ck cov er

This stand rd has be n upd ated ( se copy rig ht d ate) and ma hav e had

amend ments incorporated This wi l be indicated in the amendment ta le on

the inside f ont cov er

Am endm ents is ued sinc publ cation

Amd No Date of is ue Comments

13 1 Mar h19 4 Indicated b a sidelne in the marg in

© BSI 0 -2 0

i

Pag e

© BSI 0 -2 0

1

1 Scope

This BritishStand rd specifies req uirements for

automatic roler-ty pe couplng s for semi traier

with a la en weig ht not exce ding7! tons hav ing a

max imum imposed operating weig ht on the roler

of2#tons Howev er,the rol er should be plated for

a ma imum desig n imposed weig ht of3tons to

prov ide a load ing tolerance

2 Dim ensions

The b sic dimensions of the automatic rol er-ty pe

couplng shal be shown in Figure 1

3 Braking connections

3.1 Servic and em erg ency braking Service an

emerg ency brakes for the semi traier shal comply

with the requirements of BS AU23

1)

except that

the p rking dev ice for the serv ice l ne shal take the

form of a female member without a self-sealng

dev ice connected throug h a d ouble check v alv e

( chang e-ov er v alv e) to the mechanical actuator for

the second ry brake, so that when coupled to a

traier with mechanical brakes only , these are

operated fom the tractor serv ice brak e as wel as b

the tractor second ary brake control

3.2 Se ondary braking Operation of the

second ry braking sy stem on the semi trai er shal

be mechanical means throug h the couplng

turnta le, for ex mple b a push rod conforming to

the d imensions shown in Fig ure 1 To ensure

inter hang ea i ity the efort at the push rod shal

be4.4±0.2 kN( 90 ±5 lbf) when the push rod

actuator is operated at an air pres ure

of5 5k N/m

2

( 85lbf/ i )

4 Electrical connections

Electrical con ections betwe n the semitrai er and

tractor shal be b a sev en-pin plug and socket

comply ing with the requirements of BS AU

2)

1)

BS AU2 , “Gener a l l a yout of br a kin con etons for a r ticul a ted vehicl es usin two-l ine a ir pr es ur e system”

2)

BS A ,“7-pin pl ug a nd socket con e tor ” ( In cour e of pre aration.)

Fig ure 1 — Autom atic rol er- ty e couplng

3 9 Chiswick Hig h Roa

London

W 4 4AL

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