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Патент USA US2105317

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Jan. 1.1, 1938.
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F, C, FRANK
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2,105,317
WHEEL
- Filed Nov. 19, -1954
mull~
l
INVEN TOR.
M
ÓÍ, ./éax
ATTORNEY
Patented Jan. 11, -1938
2,105,317
UNITED STATES PATENT oFFlcE
Frederick C. Frank, South Bend, Ind.,-assignor
to Bendix lProducts Corporation, South Bend,
Ind., a corporation of Indiana
Application November 19, 1934, Serial No. 753,593
4 Claims.
This invention relates to wheels, and more par
ticularly to wheels for use in connection with
aircraft.
_
The wheels of aircraft are frequently subjected
5 during normal operation to severe overloads,
when the aircraft contacts the ground. " It iS
therefore necessary that the wheels be ‘very
strong and incorporate a high factor of safety
to avoid serious damage to the aircraft, certain
0 to result from the collapse of a wheel. It is also
necessary that `the Weight of each unit incor
porated into an aircraft be kept to a minimum
lto insure the greatest efficiency and the maxi
mum performance of the aircraft.
15
An object of this invention is toïprovide an
extremely strong, yet light-weight, wheel adapt
ed especially for use in aircraft.
A further object is to provide a wheel which
may be forged orcast of a very light,_yet strong,
20
alloy.
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Another object is to provide‘a wheel, especially
adapted for use in aircraft, which may be cast in
twov sections to be fixed together to form the
Wheel.
25
30
35
’
Still another object is to provide a two-piece
airplane wheel having no extremely thin sections
and of a‘structure such that it maybe cast of a
light, but very strong, alloy, such as an aluminum
(Cl. 301-6)
so that eachsection may be cast in a compara- y
tively simple mold.
’
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Each of the complementary main sections is
provided-with a flanged member I4 and l5 re
spectively to engage `the sides of a tire (not 5
shown) and hold it in place on the laterally ex
tending rim. members I6 and I'l of the wheel.
As illustrated, the wheel is preferably of the drop
center type to facilitate removal and replacement
of the tire, and to provide a large air space with- 10
in the tire without unduly _increasing the over
all dimensions of the tire.
'
Each of the complementary sections I0 and I2
is provided with a hub portion I8 and 20 respec
tively, having raceways 22 and 2.4 respectively to 15
receive anti-friction members, carried by an axle
l(not shown) to transmit force from the airplane
to the ground.
Means are provided to secure the hub portions
I8 and 20 together. The outer diameter of a 20
portion of the hub member I8 is decreased to
form a tongue 26 adapted to slide Within and be
engaged by a section of increased internal diam
eter or projection 28 carried by the hub member
20. . The'inner surface of the hub portion 20, 25
adjacent the projection 28, is provided with
A stm further Objectis to provide an airp1ane
Wheel designed to be cast in two sections -to be
threads 30 to receive a sleeve 32 slidable through
the hub portion I8 and provided with a section
of enlarged outer diameter or abutment 34 to
engage a section of decreased internal diameter 30
or shoulder 36 _carried by the hub portion I8 to
Yet another object of the invention is to pro
vide a cast airplane wheel having enclosed brake
drums and Ventilating means to dissipate heat
such as pins 38 projecting through the abutment 35
34 and intothe shoulder 36. The hub portions
I8 and 20 are thus securely locked together.
magnesium alloy.
fixed together by screw threads, and in which ' securely clamp the hub portions I8 and 20 to
gether. The sleeve 32 may be ñxed against'ro
novel means are provided to prevent the two sec
tation relative to the hub portion I8 by means
tions from separating.
‘ '
_
I
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' from the drums.
Other objects and advantages of the invention
40
will be apparent from the following detailed de
scription, together with the accompanying draw
ing, submitted Afor purposes of illustration only
and not intended to deñne the scope of the in
45 vention, reference being had for that purpose to
the subjoined claims.
In the drawing:
Figure 1 is a vertical section through an air
The hub portions I8 and 2li are joined to the '
laterally extending 'rim members I6 and I1 by
radially extending discs 40 and 42 respectively. 40
The discs 40 and 42 are provided with a plurality
of apertures or cut-out sections 44 and 46 to de
crease the weight of the wheel structure. The
discs 40 and 42 are further provided with later
ally extending reinforcing ñns 48 and 50 inter~ 45
mediate the cut-out sections 44 and 46 respec
tively to increase the strength of the wheel lat
erally as well as radially.
Each of the, complementary sections Ill and. I2
is provided with `cooperating laterally extending 50
Figure 2 is a fragmentary view showing a annular portions 52 and 54. The portion 52 is
plane wheel embodying the present invention;
50 and
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i
modiñed form of the invention.
.
provided on the inside with screw threads 56 to_
As shown in the drawing, the wheel is formedl cooperate with the screw threads formed in a 4
in two complementary main sections I0 and I2. » projection 58 carried by the portion 54.
55 Both sections are
to facilitate casting, ì. The screw threadsrlxing the members I2 and 55
2
2,105,317
54 together are preferably right-hand threads of
1. A drop-center airplane wheel comprising
a pitch diii'erent from and not divisible into or
a multiple of the pitch of the screw threads iixing
two main cast sections, a hub portion carried
by each section, _screw threads formed in a por
the sleeve 32 to the hub portion 20, which is pref
tion of one of said hub sections,- locking means
including a threaded sleeve having an abutment
erably a left-hand thread.
`
'
The section I0 of the wheel is provided with an
enclosed brake drum 60 having radially extend
ing cooling flanges 624 to dissipate heat from vthe
drum 60. The drum 60 is provided with a radial
.10 inwardly extending ñange 64 to permit the drum
slidable through a portion of the other of said
hub sections and engaging the'threads in said
hub section, and means including a pin to lock
the sleeve against rotation, relative to said other
60 to be clamped by means of bolts 68 to bosses
2. A wheel comprising two main cast sections
having hub' portions and rim portions, the latter
66 formed on the ñns 48.
hub section. `
‘
'I'he drum 60 is provided ywith >a radially ex
t tending flange 10 to coact with the rim member
15 I6 to aid in supporting the drum 60.« The flangev
10 is provided with apertures 12 to permit air to
' iiow through the space between the drum 60 and
the rim section I6. Air is thus permitted to cir
culate around the brake drum 60 and through
20 the cut-out sections 44 to dissipate heat from the
brake drum 60.
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y
10
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having a screw threaded connection, screw
threads formed in a portion of one of said hub“
sections, locking means _including a threaded 15
sleeve having an abutment slidable through a
portion of the other of said hub sections and
engaging the threads in said hub section, means
including a pin to lock the sleeve against rota
tion relative to the other of said hub sections, 20
said hub and sleeve threads being of a pitch dif
ferent from and not divisible into or a multiple _of
Figure 2 shows yan alternative construction
wherein dual brakes may be employed if the ef - the -pitch of the screw threads carried by said
fective braking area of the-single brake idrum
60 of Figure 1 is vinsuiiîicient to adequately handle
the load imposed upon it. The section I2 of the
wheel maybe iitted with a brake drum |60., sim
ilar to the brake drum 60 carried by the section
I0. The drum |60 is provided with a plurality
rim
portions.
p
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,
3. A drop-center airplane wheel lcomprising
two separate main sections, hub and rim portions
carried by each main section,y a screw thread
carried by one of 4said hub portions, a tire en
gaging ña'nge carried by each section, means to
of outwardly extending cooling ñanges |62, and
fix the two main sections together, said means
an inwardly extending flange |64 to permit the * including cooperating screw threads- carried by
'drum |60 to be clamped by means of the bolts each main section remote from said flanges and
|68 to the bosses |66’ _formed on the i’ins- |48.
a sleeve threaded into said one of said `hub por-V
The drum |60 is further provided with a. ra
tions at the midsection of the wheel and engag#
ing the other of said hub portions, and means
dially extending flange |10'to coact with the rim
member ||`| to aid in supporting the drum |60.
The flange |10 is formed with a plurality of aper
tures |12 to permit air to flow through the space
between-the drum |60 and the rim section ||1.
40 The brake drum |60 is _thus cooled by the cir
culation of air through the cut-out sections |46
and over the cooling flanges |62 of the drum |60.
The invention thus comprehends the provision
of an airplane wheel so designed and constructed
f’ that it may be cast or forged in two main sec
tions, of an extremely light, but very strong,
alloy, such as an aluminum vmagnesium alloy.
Novel means is also provided for fixing the t'wo
main sections of the Wheel together.
Whilethe invention has been described with
particular reference to a 'preferred embodiment,
it is- not intended to limit the'scope of the inven
Y,
to lock said sleeve against rotation with respect
' to said one of. said portions, said'screw threads
being of a diñ'erent pitch.
4. A drop center airplane wheel comprising 40
two separate main sections, hub and rim por
tions carried by each main section, a screw thread
carried by one of said hub portions, a tire en- '
gaging iiange carried by each section, means to
iix the main sections together, said means in
cluding cooperating screw threads carried by
each main section remote from said iianges, and
avsleeve threaded into said one of said hub por
tions at the mid 'section of the wheel and en
gaging the other of said hub portions, and means 50
to lock said sleeve against rotation with respect
to said one of said portions, said screw threads
tion to the embodiment illustrated, nor other- - being oppositely turned.
_
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wise than by the terms of the subjoined claims.
5
.
I claim:
45
FREDERICK C. FRANK.
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