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Патент USA US2134564

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Oct. 25, v193.
2,134,564
L. N. LAUER .
BRAKE
Filed Jan. 25, 1937
2 Sheets-Sheet l
66
24
-»64
, INV E'NTOR
Z EON /Vla x75 LHUER
BY 9"
ATTORNEY
Oct. 25, 1938.
|_. N_ LAUER
‘ 2,134,564
BRAKE
Filed Jan. 25,. 1957
/02
.
'
/60
2 Sheets-Sheet 2
/04
41'
A36
/66
. //0
,
INVENTOR
ZBYEONIVICOL/ZS LHUER
ATTORNEY
Patented Oct. 25, 1938
2,134,564‘
‘UNITED STATES PATENT OFFICE
_
BRAKE
‘
Léon Nicolas Lauer, Clichy, France, assignor to
Bendix Products Corporation, South Bend, Ind.,
a corporation of Indiana
_ Application January 25,
1937, Serial No. 122,102
In France February 12, 1936
15 Claims.
This invention relates to brakes particularly
prising threaded shoe, engaging plungers 6 and
8, having threads of opposite pitch,~threaded in
intended for use on automotive vehicles, and is
applied to brakes of the self-actuating type in
which a shoe, actuated by'the' applying mecha
a‘. sleeve
gagement with the'drum.
tweenthe' shoes and the drum M. The outer
ends of the plungers 6 and B are provided with
it
having
corresponding
internal
nism, is moved into‘ contact with a drum and is threads, in such a way that by turning the sleeve
entrained by the drum, and through the medium ‘ (e. g. by means of a pinion l2 integral with the
of an appropriate connecting mechanism acts sleeve) the distance between the shoes can be
adjusted to maintain the initial clearance be
on another shoe which is thus forced into en
‘
a
‘One of the objects of the‘ invention is to pro
vide a centering devicedesigned to maintain the
shoes in a position in‘which the friction surfaces
grooves t6; preferably rounded, which engage 10
with‘ corresponding rounded parts It of the
are centered with relation to the inner surface of 1
shoes 6 and. 8.
The connecting mechanism between the shoes
the‘ drum, the said‘ shoes being automatically
returned to this position‘ each time the brake is is carried in a U-shaped support 20 which is
secured on the backing plate, 22 in- a manner to 15
released. 'As a result of the proper centering of be
described below.
the shoes the clearance between the shoes and
The U-shaped support 20, shown in perspective
the drum can be reduced to a minimum, assuring
in Figure 4, comprises a stamping having two
ef?cient operation of the brake.
An essential element of the invention resides arms 213 and 26 in which are provided notches
in the centering mechanism being combined with 23 and 35'}, the distance between the notches being 20
a connecting mechanism inserted between the equal to the thickness of the pinion l2. The
2
shoes and which is constituted by a pair of
threaded thrust members of opposite pitch
threaded in a sleeve having corresponding inter
nal threads, the sleeve being integral with a
pinion or similar device which is guided so as
to maintain a ?xed height from the backing
plate.
30
As an important feature of the invention, the
pinion which rotates the sleeve is mounted in a
support, preferably U—shaped, on which is also
‘ mounted a crown wheel capable of being actuated
from outside the brake and which is always
35 maintained by the support in correct mesh with
the pinion.
Other objects and desirable particular con
structions‘ will be apparent‘ from the‘ following
detailed description of two illustrative embodi-.
ments‘shown in the accompanying drawings, in
which:
'
»
'
'
Figure 1 is a partial elevation with parts in
section of a brake embodying my invention;
Figure 2 is a section on the line 2-—2 of Fig
45
ure 1;
_
‘
Figure 3 is a section on the line 3-3 of Fig
ure 1;
Figure 4 is -a perspective view of the U-shaped
support;
>
Figure 5 is a view similarv to Figure 1 of a
modi?cation;
'
‘
Figure'? is a section on the line 6-6 of Fig
ure
5;
‘
r
'
Figure 7 is a section on the line "l--‘l of Fig
ure 5;
and
‘
~
9
‘
Figure 8 is a perspective view of a U-shaped
support used in the embodiment of Figures 5-7.
Referring to the drawings, a shoe 2 is con
nected to a shoe 4 by means of an expansible
60 - thrust member on a connecting mechanism com
planes of the arms 24 and 26 are parallel to the
plungers 6 and 8. Mounted in the notches 28
and 39 are spacing washers 32 and 34 provided
with diametrically opposed projections 33 and
35. The spacers 32 and 34 are held in place by 25
means of springs numbered 36 and 38 respec
tively, of equal strength, the ends of which rest
against stop rings 40 and d2 secured in notches
at the respective ends of the sleeve l8.
Thespacers‘32 and 34 are provided with holes 30
through which the sleeve ill passes in such a
manner that the pinion I2 is guided at a ?xed
height from the backing plate.
The stamping forming the U-shaped support
20 is provided with‘ two holes 44 and (it which are 35
aligned with two slots 48 and 50 formed in the
backing plate 22. The support 20 is secured to
the backing plate preferably by means of another
plate 52 outside the backing plate, and by means
of a screw 54 ‘passingthroughthe plate 52, the 40
backing plate,‘ and threaded in a nut 56 riveted
in the support 20.
,
A shaft 58 integral with a crown wheel 60 ex
tends through the hole Ml and the slot 48. The
crown wheel 60 is in mesh with the pinion it? in 45
such a manner that by engaging the ?ats 62
provided at the end of-the shaft 58 by a wrench
or key, it is possible to rotate the pinion l2 inside
the brake.
'
The adjusting pinion I2 is yieldingly main
50
tained in a predetermined position by means of
a spring 64 inserted'in two holes provided in the
arms 32 and 34 of the support 25, 'as shown in
Figure 3. The shoes are held in released posi
55
tion by means ‘of a return spring 66 tensioned
between them.
‘
V
'>
Tovadjust the brake the‘ screw 54 is loosened
and the crown wheel 60 is rotated to force the
shoes into contact with the drum. The support 60
2,134,564
2
20 is thereby moved to its proper position. ‘The
screw 54 is then tightened to secure the support 20
in this position, and the crown wheel 60 is rotated
in the opposite direction the desired amount to
re-establish su?icient clearance between the drum
and the shoes.
It will be noticed that whatever the di?erence
of thickness of the brake linings, the crown wheel
60 will always be in the same position with refer
ence to the pinion I2, preferably in the center of
the pinion. Also the pinion I2 is guided at a ?xed
distance from the backing plate and cannot es
cape from the crown wheel 60 during adjustment.
As a result of the foregoing, when the rotation
of the brake drum is in the direction of the ar
row, the shoe 2 moves in the direction of the
arrow and compresses the spring 36. Likewise
when the rotation of the brake drum is in the
opposite direction, the spring 38 is compressed.
When the brake is released, the shoes will be re
turned to their initial position by the extension
of the respective spring, the spacers 32 and 34
being returned to the bottom of the notches 28
and 30 respectively.
In Figures 5 to 8 inclusive is shown a modi?ca
tion of the invention similar to that described
above in which the same elements are designated
by the same reference numerals plus 100. This
second modi?cation is similar to the ?rst except
30 that the U-shaped support I20 is slightly modi
?ed. The support I20 is provided with arms I24
and I26 in planes perpendicular to the sleeve I I0.
In the arms I24 and I26 are formed openings
through which the sleeve IIO passes.
'
ranged to guide the ?oating thrust member, and
opposed springs acting between the ?oating thrust
member and the support to return the thrust
member to a predetermined position when dis
placed by operation of the brake.
3. In a brake for automotive vehicles, a drum,
a backing plate, a pair of shoes, a ?oating ex
pansible thrust, member between the shoes, a
pinion integral with the thrust member for op
erating the same, a support adjustably secured 10
to the backing plate, and a crown wheel pivoted
in the support in engagement with said pinion
and having means outside the backing plate for
rotating it, said support comprising a U-shaped
stamping having arms in planes traversing the 15
thrust member on opposite sides of the pinion and
formed with openings through which the thrust
member passes.
4. In a brake for automotive ‘vehicles, a drum,
a backing plate, a pair of shoes, a ?oating ex 20
pansible thrust member between the shoes, a
pinion integral with the thrust member for oper
ating the same, a support adjustably secured to
the backing plate, a crown wheel pivoted in the
support in engagement with said pinion and'hav 25
ing means outside the backing plate for rotating
it, said support comprising a U-shaped stamp
ing having arms in planes paralleling each side
of the ?oating thrust member formed with
notches paralleling the backing plate, and spacers 30
having openings through which the thrust mem
ber passes formed with diametrically opposed
arms slidably seated in said notches.
5. In a brake for automotive vehicles, a drum,
a backing plate, a pair of shoes, a ?oating ex 35
l38, of equal strength, are.
pansible thrust member between the shoes, a
mounted in the sleeve H0 and press against the pinion integral with the thrust member for op
_ Springs I36 and
pinion H2 and the arms I24 and I26 respectively
of the U-shaped support I20. The pinion H2 is
thus held by the support I20 in proper position
40
relative to the backing plate in a manner to insure
correct meshing of the pinion with the crown
wheel I60. The pinion H2 is yieldingly held in
any predetermined position by a spring I66 which
is tensioned between the shoes I02 and I04.
The operation of the modi?cation shown in
Figures 5 to 8 is identical with that of the mech
anism shown in Figures 1 to 4; the same adjust
ment is effected in an identical manner in the two
modi?cations.
While two illustrative embodiments of the pres
ent invention have been described in detail, it is
not my intention to be limited by those embodi
ments, or otherwise than by the terms of the ap
pended claims.
55
I claim:
I. In a brake for automotive vehicles, a drum,
a backing plate, a pair of shoes, a ?oating ex
erating the same, a support adjustably secured to
the backing plate, a crown wheel pivoted in the
support in engagement with said pinion and hav 40
ing means outside the backing plate for rotating
it said support comprising a U-shaped stamping
having arms in planes traversing the thrust mem
ber on opposite sides of the pinion and formed
with openings through which the thrust member 45
passes and a pair of springs each of which is
compressed between one of said arms and the
thrust member.
6. In a brake for automotive vehicles, a drum,
a backing plate, a pair of shoes, a ?oating expan 50
sible thrust member between the shoes, a pinion
integral with the thrust member for operating
the same, a support adjustably secured to the
backing plate comprising a U-shaped stamping
having arms in planes paralleling each side of 55
the ?oating thrust member formed in each edge
with opposed notches paralleling the backing
plate, spacers having openings through which
the thrust member passes formed with diametri
cally opposed arms slidably seated in said notches,
and a pair of opposed springs each compressed
pansible thrust member between the shoes, a
pinion integral with the thrust member for oper
ating the same, a support adjustably secured to
the backing plate and a crown wheel pivoted in between the thrust member and one of‘ said
the support in engagement with said pinion and spacers.
having means outside the backing plate for ro
'7. In a brake for automotive vehicles, a drum,
tating it, said support being constructed and ar
a backing plate, a pair of shoes, a ?oating ex 65
?oating thrust member at av
pansible thrust member between the shoes, a
65 ranged to guide the
?xed height from the backing plate.
pinion integral with the thrust member for op
2. In a brake for automotive vehicles, a drum, erating the same, a support adjustably secured to
a backing plate, a pair of shoes, a ?oating ex
the backing plate comprising a U-shaped stamp
pansible thrust member between the shoes, a ing having arms in planes paralleling each side
pinion integral with the thrust member for op
of the ?oating thrust member formed in each
erating the same, a supportv adjustably secured edge with opposed notches paralleling the back
to the backing plate, a crown wheel pivoted in ing plate, spacers having openings through which
the support in engagement with said pinion and the thrust member passes formed with diametri
having means outside the backing plate for rotat
cally opposed arms slidably seated in said notch 75
ing it, saidsupport being constructed and ar
75
2,134,564
es, a pair of opposed springs each compressed be
tween the thrust member and one of said spacers
and a crown wheel in mesh with said pinion
formed with a shaft bearing in’ said support ‘and
extending through the backing plate.
8. In a brake for automotive vehicles, a drum, a
backing plate, a pair of shoes, a ?oating expan
siblethrust member supported between adjacent
3
ion having a shaft journaled in said support and
extending outside the backing plate.
13. In a brake for automotive vehicles, a drum,
a backing plate, a pair of shoes, a ?oating ex
pansible thrust member supported between ad
jacent shoe ends, said thrust member compris
ing a sleeve formed at its center with a pinion
for rotating the same and a pair of shoe engaging
10 ber for expanding the same, a U-shaped sup- ' plungers formed with threadslof opposite pitch
shoe ends, a pinion carried by the thrust mem
port adjustably secured to the backing plate hav
ing arms provided with means guiding the sup
port, and a crown wheel in mesh with the pinion
journaled in said support and rotatable from out
15 side the backing plate.
.
9. In a brake for automotive vehicles, a‘drum,
‘ a backing plate, a pair of shoes, a ?oating ex
20
pansible thrust member supported between ad
jacent shoe ends, said thrust member compris
ing a sleeve formed at its'center with a pinion
for rotating the same and a pair of shoe engag
ing plungers formed with threads of opposite
screwed into corresponding internal threads in
the sleeve, a U-shaped support adjustably se
cured to the backing plate having arms in planes
paralleling opposite sides of the thrust member
having their edges formed with notches paral
leling the backing plate, the bottoms of the 15
notches being spaced apart a distance equal to
the width of the pinion, and a pair of spacers
formed with openings through which said sleeve
passes, one of said spacers being on one side of
the pinion and the other on the other side of the 20
pinion, said spacers being, provided with diametri
pitch screwed into corresponding internal threads » cally opposite projections slidably seated in said
in the sleeve, a U-shaped support adjustably se
25 cured to the backing plate having arms guiding
‘the sleeve at a ?xed height from the backing
plate, and‘a crown wheel in mesh with the pinion
journaled in said support and rotatable from out
side the' backing plate.
30
,
10. In a brake for automotive vehicles, a drum,
a backing plate, a pair of‘shoes, a ?oating ex-'
pansible thrust membersupported between adja
cent shoe ends, said thrust member comprising a
7st
sleeve formed at its center with a pinion for ro
tating the same and ya pair of shoe engaging
plungers formed with threads of opposite pitch
screwed into corresponding internal threads in
the sleeve, a U-shaped support adjustably secured
to the backing plate having arms guiding the
40 sleeve at a ?xed height from the backing plate, a
notches.
‘
14. In a brake for automotive vehicles, a drum,
a backing plate, a pair of shoes, a ?oating ex 25
pansible thrust member supported between ad
jacent shoe ends, said thrust member comprise
ing a sleeve formed at its center with a pinion
for rotating the same and a pair of shoe engaging
plungersformed with threads of Opposite pitch 30
screwed into corresponding internal threads in
the sleeve, a U-shaped support adjustably se
cured to the backing plate having arms in planes
paralleling opposite sides of the thrust member
having their edges formed with notches parallel 35
ing the backing plate, the bottoms of the notches
crown wheel in mesh with the pinion journaled
in said support and rotatable from outside the
being spaced apart a distance equal to the width
of the pinion, a pair of spacers formed with open
ings through which said sleeve passes, one of
said spacers being on one side of the pinion and 40
the other on the other side of the pinion, said
backing plate, and opposed springs compressed
spacers being provided with diametrically oppo
between said arms and the opposite faces of said
site projections slidably seated in said notches,
pinion.
‘
abutments formed on the outer ends of the sleeve
11. In a brake for automotive vehicles, a drum, and coil springs concentric with the sleeve com 45
pressed between the abutments and the spacers.
a backing plate, a pair of shoes, a ?oating ex
pansible thrust member, supported between ad
15. In a brake for automotive vehicles, a drum,
jacent shoe ends, said thrust member comprising ‘ a backing plate, a pair of shoes, a ?oating ex
50 a sleeve formed at its center with a pinion for pansible thrust member supported between ad
rotating the, same and a pair of shoe engaging jacent shoe ends, said thrust member comprising 50
plungers formed with threads of opposite‘pitch a sleeve formed at its center with a pinion for
45
screwed into corresponding internal threads in
the sleeve, a U-shaped support adjustably se
55 cured to the backing plate having arms in planes
traversing said thrust member formed with open
ings through which the sleeve passes with the
pinion between the arms, and springs compressed
between said arms and the opposite faces of the
60 pinion.
12. In a brake for automotive vehicles, a drum,
a backing plate, a pair of shoes, a ?oating ex
rotating the same and a‘pair of shoe engaging .
plungers formed with threads of opposite pitch
screwed into corresponding internal threads in‘
the sleeve, a U-shaped support adjustably se 55
cured to‘ the backing plate having arms in planes
paralleling opposite sides of the thrust member
having their edges formed with notches paral
leling» the backing plate, the bottoms of the
notches being spaced apart a distance equal to 60
the width of the pinion, a pair of spacers formed
pansible thrust member supported between ad
jacent shoe ends, said thrust member comprising
with openings through which said sleeve passes,
65 a sleeve formed at its center with a pinion for
rotating the same and a pair of shoe engaging
. plungers formed with threads of opposite pitch
pinion and the other on the other side of the
screwed into corresponding internal threads in
the sleeve, a U-shaped support adjustably se
one of said spacers being on one side of the
pinion, said spacers beingv provided with diametri 65
cally opposite projections slidably seated in said
notches, abutments formed on the outer ends of
70 cured to the backing plate having arms in planes ' the sleeve, and coil springs concentric with the
sleeve compressed between the abutments and the
traversing said thrust member formed with ‘open
spacers, and a crown wheel in mesh with the pin 70
ings through which the sleeve passes with the ion formed with a shaft journaled in said sup
pinion between the arms, springs compressed be? port and extending outside the backing plate.‘
' tween‘ said arms and the opposite faces of the
75 pinion, and a ‘crown wheel in mesh with said pin
LE'oN NICOLAS LAIJER.
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