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Патент USA US2412335

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Deq.10,l946.
‘B. E. HOUSE
‘Filed Aug. 9, 1944
~
_2,412,335
3 Sheets-Sheet 1
w
ATTORNEY
' I
Dec. 10, 1946.
B. E. HOUSE
‘
BRAKE
_
Filed Aug. 9, 1944
F 1 E_ z
-
v
’
2,412,335
_
3 Sheets-Shee? 2‘
lNVi/VTOR'
153?)?4/1/5/90055
ATTM/VEK
‘2,412,335;
Patented Dec. 10', 1946
UNITED STATES PATENT OFFICE
2,412,335
BRAKE
Bryan
House, South Bend, Ind., assignor to
Bendix Aviation Corporation, South Bend, Ind.,
a corporation of Delaware
Application August 9, 1944, Serial No. 548,640
'l'Claim's.
1
(c1. 188+78) '
2
.
This invention relates to brakes, and particu
larly to the construction and arrangement ofthe
torque reaction means of a drum type brake.
set nibs 50 extending along one side of the re
spective shoe web. and one or more nibs 52 ex
. tending on the other side of the shoe web (see
An object of the invention is to provide an im
proved brake arrangement for a vehicle in which
Figure 2). The webs of the shoes are prefer
ably located in substantially the same plane as
the ?at center portion of plate 48. A single re-.
the brake drum is mounted atior near the end of
the axle.
l
.
.
'turn spring 54 extending across‘ the center of.
In the drawings,
.
the brake assembly sumces to maintain the shoes
Figure 1 is a plan view of a proposed brake as
in released position until applying force is ex
sembly;
'
10 erted. Locating the spring at the center of the
Figure 2 is a section taken on the line 2--2 of‘
Figure 1, and showing not only the brake but
also portions of the vehicle frame and axle; and
Figure 3 is a section taken on the line 3--3 of
Figure 1.
.
.
-
Referring to the drawings, a rotatable axle i2
‘is journaled in bearings l4 mounted in a housing
l6, which in turn is secured to the frame l8 of
brake assembly is possible only because there is .
no axle or like member extending through the
center of said brake assembly.
_
I prefer to apply spreading force at the left
15 ends of the shoes (as seen in Fig. l) by means
of hydraulic wheel cylinder 56 having a bore 51
and having two pistons 58 oppositely disposed
therein and adapted to move the ends of the re
spective shoes outwardly into contact with the
' the vehicle by suitable means, such as a plurality
of bolts 20. Secured to the end of axle l2 by suit 20 brake drum. This hydraulic cylinder may be
able means, such as bolts 22, is a drum 24 having
mounted as illustrated in Figure 3, with lateral
a cylindrical braking ?ange.26_ The axle I2 is
projections 88 extending into complementary
formed with gear teeth 28 through which it
openings 62, one of which is provided in o?set
drives a'gear 38, which in turn drives the vehicle
?ange 64 of plate 40, the other of which is
wheel. This arrangement is ‘one which is used 25 provided in the ?at 66 formed in the outer plate
on certain farm tractors and the like.
-
34.
'
Application of the brakes is accomplished in
the usual way by forcing fluid under pressure
end of the axle, it is not necessary that the axle
from the usual master cylinder through con
extend through the center of the brake, as in
most conventional brake assemblies, Therefore 30 duit 68 into bore 51 .of wheel cylinder 56, spread
- Owing to the fact that the drum 24 is at the
K the housing 16 is formed with a cylindrical ?ange
32 encircling the cylindrical ?ange 26 of the. drum,
and the open end of the drum housing is closed
ing the pistons 58 and moving the shoes into
contact with the brake drum. Although the shoe
arrangement may be of any preferred type, I
by a cover, such as the stamped plate member
have illustrated an arrangement in which one
34, said memberv 34 being secured to the outer 35 shoe anchors and is applied by the other shoe,
edge of housing 32 by suitable means, such as ‘
depending upon the direction of drum rotation.
a plurality of bolts 36 (see Fig. 3). Because the
The anchoring 'shoe is intended to anchor
brake assembly and brake drum are completely
through the respective piston 58 against ?ange
_ enclosed by housing l6 and plate 34, dust and
10 provided at the center of wheel cylinder 56.
other extraneous matter is eifectively excluded. 40 The right ends of the shoes, as seen in Figure 1,
Plate member 34 is so formed as to have its
are ?oating with respect to supporting plate 40,
central portion 38 extending into the space in
side the braking ?ange 26 of the drum. The
and are in contact with one another through a
?at contact member 12 supported on the end of
arrangement is such that the braking torque of
shoe 4B, and adjuster 14 having a shaft 16 sup
the shoes is transmitted to the central portion 45 ported in a groove at the endof shoe 44, said
38 of plate 34 and thence through housing 32 to
adjustor 15 preferably being arranged ‘in' ac
the vehicle frame.
cordance with the principles disclosed in Goep
I prefer to secure a plate 48, which may be
frich and House application Serial No. 502,858,
formed by stamping, to the ?at surface of cen
?led September 18, 1943.
tral portion 38 of member 34 by suitable means, 60 As the shoes anchor during braking, the an
such as the two bolts 42, seen in Figures 1 and
choring torque is transmitted to the wheel cyl
3. Two brake shoes 44 and .46 are mounted on inder 56, and part of the torque is then trans
the plate 40, said plate being provided with a ' mitted through ?ange 64 tothe center portion
.1 plurality of guides 48' for the webs of said shoes,
38 of plate 34, the remainder of‘ the torque being
" each of said guides comprising one or more oil
directly transmitted to ?at 68 formed .on said
2,412,886
3
4
secured to the ?at portion of the ?rst-mentioned
plate-like member, brake shoes supportedlby said
member 36. The entire braking torque is thus
absorbed at the periphery of the ?xed housing 16.
second plate-like member, and spreading means
Although a particular embodiment of my in-_
for the shoes straddle mounted between an o?set
vention has been described, it will be understood
?ange on said second plate-dike member and a
by those skilled in the art that the object of the
‘ portion of the ?rst plate-like ‘member which is
invention may be attained by the use of construc
offset in the opposite direction from the part of
tions different in certain respects from that dis
said member to which said second plate-like
closed without departing from the underlying
member isrsecured.
._ principles of the invention. I therefore desire by
5. In a vehicle having a ?xed axle housing and
the following claims to include within the scope
an axle rotatably supported therein, a brake and
brake housing comprising a drum secured to the
‘of my invention all such variations and‘ modi
?cations by ‘which substantially the results of
axle near the end thereof and having an out
my invention may be obtained through the use of
substantially the same or equivalent means.
vI claim:
1. A brake comprising a drum secured to an
axle near the end thereof and having a cylin
drical braking ?ange, a housing secured to a
‘ housing to overlie the cylindrical ?ange of the
the shoes straddle mounted between an onset
_ means for the shoes straddle mounted between
‘?ange on the plate and a portion of the housing
offset in the opposite direction from the part of
the housing to which the plate is secured.
the opposite direction from the part thereof to
wardly extending cylindrical braking ?ange, a
?xed ?ange extending outwardly from said axle ' I
brake drum, a plate-like stamping secured to the
outer edge of said ?xedv?ange to complete the
brake chamber andhaving an axially inwardly
?xed part of the vehicle and enclosing the drum,
said housing having a portion extending into the 20 offset ?at central portion situated in the space
inside the braking ?ange of the drum, a second
space inside the braking ?ange of the drum, a
plate-like stamping having a ?at center portion
plate secured to said portion of the housing, brake
‘shoes mounted on said‘plate, the webs of said ' i lying against and secured to the ?at portion of,
the ?rst-mentioned stamping, brake shoes sup
shoes being‘in substantially the same plane as
the plate, and a, hydraulic cylinder for actuating 25 ported by said second stamping, and spreading
an o?'set ?ange on said second stamping and a
portion of the ?rst stamping which is offset in
2. A brake comprising a‘ drum secured to an 30 which said second stamping is secured.
6. In a vehicle having a ?xed axlehousing and
axle near the end thereof and having a cylin
an axle rotatably supported therein, a brake‘and
‘drical braking ?ange, a.housing secured to a ?xed '
brake housing comprising a drum secured to the
part of the vehicle and enclosing the drum, said
axle near the end thereof and having an out
‘ housing having a portion‘extending into the‘space
inside the braking ?ange of the drum, a plate 35 wardly extending cylindrical braking portion, a
‘ secured to said portion of the housing, two brake
shoes mounted on said plate, and a single return
ispring connecting said shoes across the center
‘of the brake and urging them to released-posi
tion.
.
?ange extending outwardly from said axle hous
I ing to overlie the braking portion of the brake
drum, 5. plate-like closure member for said hous
ing secured to the outer edge of said ?ange to
40 complete the brake chamber and having an axi
3. A brake comprising a drum secured to an_
I axle near the end thereof and having a cylin-
drical braking ?ange, a‘housing secured to a ?xed
part of the vehicle and enclosing the drum, said
housing having a portion extending into the space 45
inside the braking ?ange of the drum, a plate
secured to said portion of the housing, brake
‘shoes mounted on said plate, and an actuator
arranged to spread the shoes and straddle mount
ed between an offset ?ange on the plate and a 50
portion of the housing offset in the opposite
direction from the part of the housing to which
ally inwardly o?set central portion situated in the
space inside the braking portion of the drum,
a second plate-like member secured directly to
the central portion of, the ?rst-mentioned plate
like member, brake shoes supported by at least
one of said plate-like members, and spreading
means for'the shoes straddle mounted between,
said plate-like members.
,
'7. In a vehicle having a ?xed axle housing and
an axle rotatably supported therein, a brake and
brake housing comprising a drum secured to the
axle near the end thereof and having an out
wardly'eirtending cylindrical braking portion, a
the plate is secured.
'
?ange extending outwardly from said axle hous
4. In a vehicle having a ?xed axle housing
and an axle rotatably supported therein, a brake 55 ing to overlie the braking portion 'of the brake
‘ and brake housing comprising a drum secured to
the axle near the end thereof and having an
outwardly extending cylindrical braking ?ange,
drum, a closure member for said housing secured
to the outer edge of said ?ange to‘ complete the
brake chamber and having an axially inwardly‘ _
o?set central portion situated in the space inside
housing to overlie the cylindrical ?ange of the 60 the braking portion of the drum, a support mem
ber secured directly to the central portion of
brake drum, a plate-like closure member for said
the closure member, brake shoes supported by at
‘ housing secured to the outer edge of said ?xed
least one of said members, andspreading means '
?ange to complete the brake chamber and hav
for the shoes straddle mounted between said
ing an axiallyinwardly offset ?at central por
,
4
tion situated in the space inside the braking 65 members.
BRYAN E. ‘HOUSE.
?ange of the drum, a second plate-like member
a ?xed ?ange extending outwardly from said axle
having a ?at center portion lying against and
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