close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2404326

код для вставки
July 16, 1946_
.
-
A. G. TAYLOR
SELF-ADJUST'ING' MECHANISM FOR HYDRAULIC WHEEL BRAKES
Filed July- 18, 1945
.
‘ì
2,404,326
I
W
/
ß
WS@ /d
¿í
„
/
,
/5
\ \ f2
MM
AHMUYGQOYQQTOLHIO"
u
@d
\N\/ENTOf?-,
»9m ATTY.
Patented July 16, 1946
2,404,326 `
s PATE-N1" om@
TED
.
. 2,404,326
v
v
SEEE-ADJUSTING iviEcnAisusMfEoa ’I 1.
uHYDRAULIC WHEEL BRAKES
A
f
.fArthurîîGeorge Taylor, Hadley; Barnet; England,
' assìgnor of'one-half to F._»J.'W,alkerr;Engineer-‘ '
ing Company Limited, Barnet, »Englanma Brìt- ‘
I-,ish .company
Application July 1s, 1945,'ser‘ija1fNo. 605,727
‘
'inoreatßritain July 31;"71944I
‘
> ’
t .4 claims. (criss-79.5.). K1
piston; the extent-01E` retractive movement thereof
' '.zfrähisinvention relates‘to fhydraulicaìllyactuated
wheelybrakestand ‘isf particularly concerned with
is-«limitedzf
i yThe rigid' ‘ member
`
' which
‘ `.is-‘preferabl-y
'
f
y located
‘
.thewheelbrakesfof'motor-cars.
'
‘
1
concentricawithi -the -pistol-Vork pistons in A. a cylin
Brake mechanisrr'i'sïxmly."have` `a ilimitedgmove
der,` conveniently takes .fthelform- Vof a ’ster-n1,A or rod
imentf~ and as thezhr'ake,¿shoe'linings wear down
.it sislfjnecessaryaat fintervalsu to adjust :the actuat
:ingtimechanismffwhich is _oftenfa‘matter ofediiñ
' at one oreach end> ofl which
a Äseries offconf;
centric '-'teethf"preferably1 formed: as fafseriese` of
lc_ulty".avhereìiithere~í are# several mechanisms, as
concentric'truncatedfoonesf with 'their rapices . di
Áwith;theízbrakes‘-cf motor..cars,<which:have to be
balanced.V :Itwis known thatî-the manual» adjust
rected towards. fthe middle of` the rod; whichform
thezabutments withvwhich the elementiinma `-pis
ment of ',:brakefmechanisms’ isg'tedious ' and hence
tenten-gages.
"Y Thefrigidfmemberi
’
‘
" andrits
"
isrigofiten ¿neglectedëandv to ,-obviate, this »there -have
associated
`
Y " ~- piston
‘
~
„or
-pístonsware vfree «floatingfand therefore fu11y~ self
been-proposals? to fprovide e a-_ âdegree ofF automatic
adjustment in» 'the , ,actuating f mechanism. «This
’mayv bey-¿more or »less satisfactorily» laccomplished
compensatingfand in- addition will. automatically
sel-?centre wher-ethere are two pistonslina cylin
Introd: operated'. :hralre/` mechanisms by kmeans ì
derdueë’tothe brake shoe returnspr-ings.`
`which ,will-.Vary the :length ofea‘ch-,opei‘ating rod
*‘
~ In forderwthatv lthe l:invention rmay” be .clearly
»withzafdegfree of play which will avoid bindingßof
understood andi-readily»fcarriedfintof `-eiîeet fem-'
the ;, rbrakes. The; problem ~isî~` more f -serious » with
bodiments :thereof: are hereinafter .more tullypde
hydraulically yoperated fbrakesaand , automatic> ad' l20 :scribed A=,rwith“reference „to .» «the faccompanying
j-usi'ment~ _can Aonly « be accomplishedv by providing
drawingcwhich is;- given-:asa non-limitatìvefex
Yadditional-fmeans-.Which -act asfvariablenretractive
"ample andfinwhich:
stops.
. : \ '.Eigure...:11~. is~ a- half- sect-ionedf‘side :elevationI -of
Such additional I“means , »complicate the
.
’
i
'
-
the-»cylinder of“ far ïhyd-raulically j- operated brake
rfmechanism-„and as. they: cannot yheplaced 'at Ethe
rpointfof maximum .movementrof shoest due ìtothe au with onefoffi-tsspistonsffand’theautomatic-_adjust
ment „means-f associated therewith vshown inqfsecr
`"lfiydraulic "cylinder, there» situated rthey` .can -only
Y giveÍ a limited ldegreeîoftl rough-adjustment.
‘
. VVThe F»principal,object ¿of `.thepresent invention
tion;
i
f
, .fEigurex 2*:-is raflview similar »to -Figurerl- .oft the
A,same mechanism I »but «~,incorporating «means „for
-is-tomrovide- an improved. automatic self -adjust
Í.ing mechanismk to .compensate for wearing .down ,f êûdimítiingr. the `degree @of self-compensatory. imove
¿ of: .thebrake- linings >oiëna; hydraulically. actuated
.brakegwhich is. vof ’ simple, efficient, construction
t and capable:~„of.-.givingnne :adjustmentwithout
„añecting the design .o1-,construction of the. brake
.ment,y.„Fìguresß and 4 show end. and sidesectìon views
respectively» .of« the . elements .t which ,engager . the
`«toothed,orrack rod,
.
-
,
,.
,toîEigure- ~1 `
_. meohanismeorl requiring... the fprovision fof.; addi 6.35 Figure 5 is another view
,.showìng.- anf .. alternative. form ,c of. :automaticad- t
„tional- par-ts.. `.A furtherobject of'the :invention
is to so locategthe,,adjustingmeans thatthey are
1 .eilîeotive .at .the .points of .maximum t movement of
.ithe .brakevshoes „fon :morecertain .operation .with
amplemargin of play. to avoid., binding ,of the
brake, shoes.
»
.
y , _ î.iALfIi'rtlrierc obj ectl of; the invention is .to ,provide
,_ such an, adjusting; meclfianisrn,'.Whîi‘zh.A is .fully self
compensating. Ü .
,jusltmenti means,
Y
’.»Figure „6.f isaI sectiontaken _on` theline
> ,oi Eigure 5.1ooking in thedirection of the arrows,
,.,Fig-urelüjs a. plan view. on. ,amenlarged- scale’
looking‘down’on the ypistonseen in ‘Figure 5*. î i
„'Beferringnow to tnesaidpdrawing.„throughout
which identicalpalëts bear; likereference numer
¿. L'Iïheaboye and further objectsîoi theinvention ïtßvalsQand infparticular tolï‘igurel thereof, Whois a
will ¿be E_apparent„from the, following description. Y cylinder . ofl` normal; design _ot .a hydraulically ,ac
tuatedbrake „mechanismV which is carriedJcyJaJ
' According to the present invention, .the `orl each
ñxed «party and has1 a centrallyiocated orifice
through which iluidlgflowsl in and out and by its
brakev mechanism moves axia1ly„.of„an internal
vvrigid member which is not .aifectedjhythe fluid f .50 >pressure moves in opposite directions a pair of
„pistons‘therebyto rock Y.at least, two brake shoes
Apressure; and uan „element within1 such piston
whißhare retractedbya „Sprînain thenormal
wlîii‘cliv has .an extent, ofv free .movementaxially
~manne13r ,In the „embodiment illustrated each
¿thereof isadapted .to engage with aline of abut
piston _is formed .of two parts 1.1,] [2.0i „whichrthe
àmen'ts on'_'~thefi1i'gid-- member; such that after a`
piston in a cylinder of a hydraulically‘actuated
`Aïlzgre:determinedîdegree ofY `excess movement of 'n the
-55 Á latter, partially
telescopes into the former. Itó ,form ‘
2,404,826
5
ting said engagement means to
engage. said teeth, and means'in said cylinder to
said ahnt--v
>contain and permit limited axial movement o!
ments in one direction only.
said pair of elements.
2. In a hydraulic brake, a cylinder,` two opposed '
pistons'in said cylinder, each piston havinga cen
tral axial bore, a free rod having its ends located
loosely in said bores in said pistons, means for lim
iting the extent of free movement of said rod, a
'
Y
4. In a hydraulic brake, a cylinder, at least on l
5 n
series of abutments at each end of said rod, means Y i
piston located in said cylinder- and having a cen
tral axial bore thereima rod terminating in a plu- `
rality of abutments located loose in said bore in
said piston, a pair of elements embracing and re-' , Y 1
siliently urged to engage saidabutments, means
for engaging said abutments to pass the same in
permitting said elements to pass said abutments
only one direction, and means within each of said 10 in one direction only, means in >said cylinder to
pistons to contain said engaging means for lime
contain and'permit limited axial movement of
ited axial movement.
said pair of elements, and means for limiting the Y
3. In a hydraulicb'rake,v a cylinder, at least one Y
extent of movement of said piston relative to said
piston located in said cylinder and having a cen
rod permitted by said elements passing said
tral axial bore therein; a rod terminating in but 15
abutments.
'
i
tress teeth loose in said bore in said piston, a pair
i
v
'
ARTHUR GEORGE TAYLOR.
of elements embracing and resiliently urged to>
Документ
Категория
Без категории
Просмотров
0
Размер файла
468 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа