close

Вход

Забыли?

вход по аккаунту

?

код для вставки
NOV. 26, 1946.
p_ E_ HAWKlNs
2,411,570
STEERING GEAR FOR VEHICLES
Filed Nov. 27,_ 1943
5 Sheets-Sheet l
’
w‘ \
g
v
/.
/
PAUL E-HAWKINS.
my
5
Nov. 26, 1946.
P. E. HAWKINS
2,41 l ,570
STEERING GEAR FOR VEHICLES .
Filed Nov. 27, 1943
11,114,111‘
:s Sheets-Shéet 2
Nov. 26, 1946.
P. E. HAWKINS
2,411,570
STEERING GEAR FOR VEHICLES
Filed Nov. 27, 1943
‘s Sheets-Sheet 5
_ FIG. 9
BY
M
Patented Nov. 26,1946
2,411,570
UNITED STATES PATENT OFFICE
2,411,570
‘STEERING GEAR FOR VEHICLES
Paul E. Hawkins, Lakewood, Ohio, assignor to
'\
The Baker-Rauiang Company, ‘Cleveland,
a corporation of Ohio
Ohio,
Application November 27, 1943, Serial No. 511,997
12 Claims. (01. 280-787)
This invention relates to wheel-mounted ve
hicles, more particularly to the steering gear
mechanism therefor. The invention is particular
ly applicable to motor driven vehicles, although
it is not to be limited to vehicles having a motor 5
traverse paths about a common ‘center during
turning movements of the vehicle.
Another object of the invention is to provide
in a vehicle having a pair of dirigible supporting
wheels, improved connections between these
or pneumatic type) and the pavement or road in
Another object of the invention is to provide in
a vehicle having a pair of dirigible supporting
"and powered thereby. ’
,
wheels having an automatic compensating or
In all vehicles employing a pair of dirigible
differential mechanism operable to position the
wheels to e?ect steering thereof, of ‘which I have
dirigible wheels in di?erent angular relation for
knowledge, operation of the vehicle along curvi
steering the vehicle whereby in each steering po
linear paths has caused slippage between the 10 sition these wheels traverse paths about a com
treads of‘ the tires (whether of the solid, cushion
mon center.
directions laterally of or at angles to the plane
of each wheel, such‘ slippage resulting in wear on
wheels, improved connections between the
the tire treads, stresses on the wheel mountings 15 dirigible mounted wheels and related to the axis
as well asiwear of the pavement or road; and ob
of the non-dirigible wheel or wheels, operable in
viously th’ese disadvantageous conditions are in
any steering position of the dirigible wheels to
creased in proportion to the weight of the vehicle
eiTect traverse of all of the supporting wheels
and its load. This wear takes place to a greater ‘ about a common center.
extent on the tires' for the dirigible wheels as 20 Another object of the invention is to provide
compared to the non-dirigible wheels of the ve
in a vehicle having at each end thereof a pair of
hicle, for which reason it is customary to shift
the tires on the wheels. Also, greater wear takes
dirigible mounted wheels, improved connections
between each pair of wheels operatively connected
place on the tires of vehicles having shortened
to simultaneously swing all of the wheels and ar
wheel bases and/or narrowed treads as compared 25 ranged to ‘ell’ect differential movement of the
to tires on vehicles having'long bases and/or wide
wheels of each pair, whereby all of the wheels in
treads.
each steering position thereof traverse paths
While such wear may be reduced to a limited
extent by maintaining perfect alinement of the
about a common center.
Other objects of the invention will be apparent
wheels and adequate pressure in the tires (if 30 to those skilled in the art to which my invention
pneumatic tires are used), such wear is always
relates from the following description taken in
present due to the fact that when the dirigible
wheels are operated about their respective trun
' nions or steering knuckles, they as well as the
other supporting wheels for the vehicle do not
traverse paths concentric to a common center.
One object of'the invention is to provide an
improved steering mechanism for a wheel mount
ed vehicle wherein wear on the wheel tires due
to slippage thereof in steering .the vehicle is 40
eliminated.
connection with the accompanying drawings,
wherein
‘
Fig. l is a side elevation of a vehicle embodying
Q my invention.
Fig. 2 is a plan view showing'the wheels for
the vehicle and steering gear.
Fig. 3 is a fragmentary view of the steering gear,
enlarged.
'
Figs. 4 and 5 are sections on the lines 4-4 and
5-5, respectively, of Fig. 3.
Another object of the invention is to provide
Fig. 5a is a fragmentary plan view of parts
in a vehicle having dirigible supporting wheels
shown in Figs. 2 to 5, inclusive.
improved connections between them for simul
Figs. 6 and 7 are diagrammatic views illustrat
taneously swinging the wheels about their respec 45 ing the method of relating the steering connec
tive knuckles into di?erent angular relation,
tions to the steerable wheels; Fig. 6 also showing
whereby the wheels traverse paths about a com
in dotted lines one steering position of the steer
mon center to effect steering of the vehicle.
able wheels.
Another object of the invention is to provide
Fig. 8 is a plan view (partly diagrammatic)
in a vehicle having one or more non-dirigible 50 showing a modi?cation wherein all four wheels
supporting wheels and a pair of dirigible sup
of the vehicle are steerable.
porting wheels, improved connections between
the latter wheels for simultaneously swinging
'_ them about their respective knuckles into di?er
Fig. 9 is a section on the line 9-9 of Fig. 8
In the drawings, I indicates as an entirety a
vehicle embodying a steering gear ashereinafter
,ent angular relation, whereby the dirigible wheels 55 set forth. The vehicle I shown for illustrative
2,411,570 '
3
.
common center or centers which lie in the axis a.
The differential mechanism I3 comprises the
following; I4, 14a, indicate a pair of links pivot
ally connected at their outer ends to the outer
ends of the arms 8, a connector I5 pivotally con
nected to and arranged to ?oat between the in
elevating mechanism 4 are non-steerable and
power driven and the driver’s station 5 is,also
adjacent to and faces the elevating mechanism
4, so that the wheels 2 may be referred to as the
front wheels and the wheels 3 may be referred
to as the rear wheels. It is to be observed that
in industrial trucks it is the practice to provide
4
wheels 2, 3, will always traverse paths about a
purposes is of the industrial type having a pair
of power driven wheels 2, dirigible steering wheels
3 and a suitable elevating mechanism 4. In the
arrangement shown the wheels 2, adjacent the
' _ ner ends of the links and guides I6, IGa, for con
" trolling the movement of the connector I5. The
10 link I4 is pivotally connected on an axis 1) at its
inner end to the connector l5, whereas the inner
‘
dirigible steering wheels at either end of the-truck , end of the link No is pivotally connected on an
axis b’ to the connector I5 at one side of the axis
irrespective of whether it embodies an elevating
b of the pivotal connection of the link I4 with
mechanism and also to position the driver's sta
tion remotely from the elevating mechanism or 15 the connector I5, the axes b, b’ preferably being
in a plane parallel to the planes of the wheels
what may be termed the front end of the truck.
Since the improved steering gear herein disclosed ‘ 2, 3, whenrthe latter are in normal position for
vehicle travel in a straight line forward or back
is applicable to all wheel mounted vehicles and
ward, and the connector I5 is provided with a
vehicles having front or rear steerable wheels,
such disclosure is merely illustrative of the pre 20 device I‘I (preferably consisting of a stud shaft
provided with a roller I193) which is disposed lat
ferred application of the invention.
erally of the plane intersecting the axes b, b’, and
The wheels 3 are mounted On suitable spindles
has pivotal and slidable engagement with the op
3a, having knuckles pivoted on pins 8 mounted
posed walls of the guide I6. By preference, the
in the opposite ends of the axle ‘I and integrally
connected steering arms 8 preferably extending 25 connector I5 consists of a bell-crank having a
short arm I5a, which is disposed parallel to the
forwardly from the axle ‘I. The axle 'I is con
wheels 3 when the latter are in normal position,
nected in a well known manner to the vehicle
and a long arm I5b preferably disposed at right
frame by springs ‘Ia. One spindle knuckle is pro
angles to arm I5a, the link I4 being pivotally
vided with an arm 9, the outer end of which is
connected by a stud shaftv I4’ on the axis b to the
connected by a rod Ill to a suitable gearing I I, the
bell-crank at the angle between its arms I5a, 15b,
latter in turn being connected through the steer
so that the lever arm I5b forms, in effect, an
ing column IIa to an operating member, prefer
extension of the link I4, and the lever arm I‘Sa
ably consisting of a wheel I2, whereby the arm
serves as a connection between links I4, Illa,
9 may be operated to effect steering, as later set
35 whereby the power transmitted from the wheel
forth.
I2 through the arm 9 and adjacent arm 8 to the
I3 indicates as an entirety a differential or com
link I4a will move the link I4 substantially end
pensating mechanism connected to the arms 8
wise but differentially as later set forth. The
and arranged, upon operation of the wheel I2
outer end of the short lever arm I5a is provided
during vehicle travel, simultaneously to swing the
wheels 3 in either direction into different rela 40 with a device I‘Ia (preferably a stud shaft pro
tive positions, whereby the wheels 3 traverse ' vided with a roller "12’) slidably engaging the
opposed walls of the guide Ilia, which preferably
arcuate paths about a common center, which
consists of an elongated slot extending substan
center in any operated position of the wheels is
tially parallel to the axle 1, formed in a plate I8,
intersected by an imaginary line a extending par
whereas the roller I‘Ia: on the device I‘! on the
allel to the normal axis of the wheels 3, shown
outer end of the long arm I5b of the bell-crank
at a’ .(Fig. 6). By preference, the mechanism I3
I5 slides in the guide I6, which consists of a cam
is related to the axis of the wheels 2, as later set
shaped
elongated slot formed in the plate I 8,
forth, that is the imaginary linea is co-incident
Each
of the links I4, I4a, is of sectional con
with the axis about which the wheels 2 rotate.
Accordingly, in any turning movement of the ve 50 struction to provide for their adjustment in
length endwise. The outer end of each link ter
hicle, due to operation of the wheel I2, all four
minates in a yoke MD to receive the outer end
wheels 2, 3-, will traverse paths about a common
center. Where the steerable wheels have a di
ameter larger or smaller than the diameter of
the non-steerable wheels (as shown), this imagi
nary axis or line a will be disposed in a plane per
pendicular to but above or below the axis of the
of the adjacent arm 8 and likewise the inner end
of each link I4, I4a, terminates in a yoke I4b’
55 which straddles the bell-crank I5 (see Figs. 4
_
I8
5). I preferably provide two plates
spaced by sleeves I8a surrounding bolts I8b,
which clamp the plates in rigid relation, both
plates being formed with guide slots I6, Ilia;
and
wheels 2; since the diameter of the wheels 3 is
less than that of the wheels 2, the center of the
arcuate paths traversed by the wheels 2 and 3 will 60 In this arrangement, the device I'Ia on the end
lie on a line (1 below the axis on which the wheels
2 rotate.
While the range of swinging movement of the
wheels -3 about their respective pins 6 relative
of the lever arm lid is provided on the opposite
sides thereof with rollers I‘Irr' engaging the side
walls of the slots Isa and the device I‘! on the
lever arm I5b is provided on the opposite sides
to the axis a’ (see Fig, 6) may vary, as it is cus 65 thereof with rollers Ila: engaging the side walls
of the slot I6.
tomary in maneuvering turns to decrease or in
In the disclosed arrangement the plates I8
crease the turning radius and in bringing the
are
disposed on the outer side of the axle ‘I; by
vehicle into a forward or backward straight di
preference the inner U-bolts (also designated
operation will obviously move the common center 70 I8b) which secure the springs ‘Ia to the axle ‘I
are utilized to secure the plates together along
for the wheels 2, 3, along the imaginary axis a,
their inner sides and to rigidly mount the plates
in one direction or the other, dependent on the
on the axle ‘I. The plates I8 and parts there
direction of swinging movement of the wheels 3,
between
are preferably enclosed in a suitable cas
so that during any right or left turning move
ment of the vehicle on a ?xed or varying radii, the 76 ing I9, which is also secured in position by the I
rection of travel, such variations in the steering
,
2,411,570
, b its llb, as-shown in Figs.‘ 3 and 5, the end walls
always move in paths about a common center
of the. casing being formed with openings or
in each operated position of the wheels 3, slip
cut-aways l9a (see Fig.5a) through which the
page of the vehicle wheels relative to the pave-'
links ll, Ila, extendto permit movement thereof.
mentor road is eliminated and that therefore
In view of the fact that the rollers. llx, I13’,
wear on the tires due to slippage of this character
are mounted on vertical axes and provided‘, with
is avoided.
'
s
flat peripheries and the side walls of the guide
|_ From the foregoing description it will be appre
slots l6, l6a, are flat, the bottom wall- of the
ciated that the shape of the cam slot It to con--.
casing I9 is utilized to slidably support. these
trol the di?erential movement of the wheels 3.
rollers and inner ends of the links M, Ma, during 10 whereby in any and all operating positions for
the vehicle laterally, they and the wheels
As shown in Figs. 3 and‘ 5a, the guide slots. steering
2 may traverse paths about a common center, de-v
16a for the lever arm lia extend transversely of v
pends on certain dimensions of the vehicle, such
the vehicle, whereas the cam-shaped guidejslots
as its wheel base, the treads of its wheels, the
It for the lever arm libhave opposite end por
length of the arms 8 and the angle thereof rel
tions l6’, It", at either side of their mid or peak
ative to the wheel spindles 3a and lengths of
portion, the angle, of the portion l6" relative to
the bell-crank arms l5a, l5b', the distance be
the slots [6a being greater than that of the por
tween the axes of the pins 8, also the links ll,
tion l6’. When the. wheels 3 are in normal posi
Ha, must be adjusted to the proper lengths.
tion for forward or backward rectilinear travel 20' When these factors are known, the wheel spindles
the roller I11: is at the peak positions of the" cam .
3a,‘ arms 8, links H, “a, the bell-crank I 5, a slot
slots, whereby it may move ineither direction
I 6.1:, the roller Hz’ in the slot Ilia: as shown in
and the roller' Hz’ is disposed intermediate the
Fig. '7, the roller Ila: and a line (not shown)
‘ends of the slots lGa, whereby it may move in
spaced from the axle ‘I representing the axis a
either direction. Accordingly, when operation of
of the wheels 2 are drawn or developed on a sheet
the wheel l2 to swing the wheels 3 in either di
of suitable material, these parts being shown in
‘ rection takes place, for example, to the right, as
normalposition (this position being illustrated
indicated at C (Fig. 3), the rod Hawill transmit
in full lines in Fig. 7). With the parts shown
movement thereof.
'
‘
’
'
such operation through the bell-crank l5 to the
rod l4, thereby bodily moving the bell-crank and
endwise moving the link l4. During such move
ment of the bell-crank l5, theroller I‘Izc' moves
rectilinearly transversely of the vehicle in the
, guide slots l6a, whereas the roller I‘Ia: traverses
in this’ relation, the position of the roller I1 is
?rst plotted to indicate the peak position of the
cam guide slot. Next, the arms 8 are moved to
different positions (that is, plotted on the mate
rial as shown in dotted lines) to show the spindles
lie on radii common to a center on the line a and
the cam port-ion l6" of the guide slot I6 in a 35 the position'of the roller Ila: is then plotted on
direction outwardly and laterally (the pivotal I the“ material. This plotting process is repeated
connections between the links M, Ma, and bell
for successive positions of the spindles 3a (three
crank l5 permitting movement of the latter rela
positions being shown in Fig. 7,) throughout the
tive to the links), the result being that a reduc
steering range for the wheels 3 at either side of
ing di?erential movement of the link I 4 relative 40 the peak position. As. the diameter of the roller
‘to that of the link Hz: is effected due to the
Ila: is shown, the cam slot lBx' may be. ‘plotted
inclination of the cam portion 16" of the guide
from .the successive positions of the axis of the
slot I6, and accordingly in any steering opera
roller I 1x.
tion toward the right the range -of movement of
It will be observed that the arm 3 may be con- .
the left side wheel 3 will be less than that of 45 nected to the spindle 3a of either wheel and that
the right side wheel 3. On the other hand, in
the differential mechanism may be positioned
any steering operation toward the left, the roller
rearwardly of the axle ‘I.
I12: traverses the guide slot cam portion IS’, the
It will be observed from the foregoing descrip
angle of which relative to‘the guide slot is less
tion_that the cam slot It may be plotted from‘
than that of the cam portion l6", so that the 60 centers on any line parallel to the normal axis
movement transmitted by the link Ila through
a’; accordingly, in a vehicle having one or a pair
the bell-crank l5 to the link [4, will effect an
of rigid supporting wheels 2, if this line is for
increasing differential movement to the latter
ward or rearward of the axis a, only the wheels
link so that the range of movement of the left
3 will traverse paths about a common center dur
side wheel 3 will be greater than that of the right 55 ing steering operations. By preference the cam
side wheel 3.
'
slot IQ is plotted from the axis a, so that all of
Fig. 6 diagrammatically shows the angular
the wheels will traverse paths about a common
steering relation of the wheels 3, on the radii
center in the operation of the vehicle and since
‘d, d’, struck from the center :03 when the right»
this plotting is on or relative to the axis a, one or ,
side wheel 3 is disposed at an angle of 50 de 60 a pair of non-steerable wheels may be provided
grees relative to the axis a’, whereby the wheels
at that end of the vehicle opposite to the steer
2, 3,, traverse paths about this center; radii e, e’,
able wheels.
struck from the center x2, indicate the position
Flg. 8 illustrates the application of my inven
of the wheels 3 when the right side wheel is , tion to a vehicle having four steerable wheels 2',
swung to a 30 degreeangle relative to the axis c5 3', knuckle mounted on axles 1', 1", respectively,
a’; and radii J‘, J", struck from the center :11’,
as shown in Figs. 3 and 4. The spindle for one
indicate the position of the wheels 3 when the
of the wheels 2' and the spindle for one‘ of the
right side wheel‘ 3 is swung to a 20 degree angle
wheels 3' are provided with arms 9' which are
relative to the axis a’. Accordingly, it will be
operatively connected, as later set forth.
observed that when a steering operation takes 70
I 3’ indicates as an entirety, a differential steer
place,‘the compensating or differential mecha
ing mechanism between and connected to the
nism l3 serves to position the wheels 3 in such
wheels 2’ and I3" indicates as an entirety a dif
relation that they and the wheels 2 move along‘
ferential steering mechanism between and con
paths about a common center.
.
nected to the wheels 3', each of these mechanisms
It ‘will be observed that since the wheels 2, 3, 76 being similar in construction and operation to
2,41 1,570
.
7
'
'
8
.
the mechanism l3, already described, except the
shape of the guides or cam slots lib, l6c, and
the arrangement thereof, for which reason a de
tail description of the mechanisms l3’, [3", will _
not be necessary to an understanding of the in-'
'vention and its application to the simultaneous
connected to said swingable means and the other
wheel for swinging the other wheel from normal
position in either direction, whereby both wheels
swing in the same direction when operated for
steering the vehicle on curvilinear lines of travel,
said connections including an intermediate con
steering of fourwheels. Due to the fact that in
necting element ‘operable to permit overlapping
adjacent transverse .guide slot I63, is remotely
related to the corresponding portion [60' of the
position to effect vehicle travel on arcs about a
relative movement between other velements of
any steering position ,(a) the wheels 2' are swung
said connections, and guides for the elements
in..one direction and the wheels 3' are simul
taneously swung in the opposite direction, the 10 of said connections, said connections being there
by operable to automatically‘ position said swing
lateral portion lib’ of the cam slot lSb, which
able wheels in angular relation in any operated
portion‘ has the increased angular relation to the
cam slot lie and (b) the cam slots l?b, I60, are 15
common
center.
,
‘
2. A vehicle as claimed in claim 1 wherein the
guides consist of a cam with which the elements
plotted in the manner already set forth according
of said connections slidably engage.
'to centers which, in this form of construction, lie
3. In a vehiciecomprising a wheel mounted
in an imaginary plane between the normal axes
frame, the wheels atone end of said frame be
a: of the wheels 2', 3', as indicated by the line :c'.
Accordingly 'when the wheels 2', 3' are positioned 20 ing mounted to swing on substantially vertical
axes from normal position in either direction for
as shown in" dotted lines, they will traverse paths
steering the vehicle, manually operated means
about the common center 1:", and this will apply
connected to one of the wheels and connections
to a predetermined center in any steering position
between them, said connections comprising a
of the wheels 2', 3’.
‘
It will be observed that the centers about which 25 pair of transversely disposed links each pivotally
connected at its outer end to one of said wheels,
a separate link pivotally connected at its opposite
ends to the inner ends of said links and operable
the other pair, each cam slot lGb, |6c, must be
to transmit the thrust or pull from one link
separately plotted in the manner already set
forth; however, where this line is disposed mid 30 to the other link to swing both wheels in the
same direction when said manually operated
way between the pair of wheels (that is,‘ their
means "are operated, and means for controlling
axes), as shown in Fig. 8, the cam slots will be
the movement of said separate link during op
similar in shape except that their lateral por
eration of said manually operated means to per
tions will be reversely related for reasons above
set forth; accordingly only one cam slot needs 35 mit relative movement between the ends of said
the wheels 2', 3', move lie on a line therebetween.
Where this line is nearer one pair of wheels than
to be plotted on a chart or other material for one
links endwise thereof, one slower or faster than
the other link dependent upon the operation of
pair of wheels, as it is only necessary to turn the
said wheels to either side of their normal posi
chart over for determining the shape of the cam
tion.
slot for the other pair of wheels. The plotting is
4. In a vehicle comprising a frame, a pair of
carried out similar to that already set forth, ex 40
spaced supporting, steerable wheels at each end
cept that one pair of wheels only are successively
of said frame, each wheel of each pair being
related to centers on the plane or line a’ midway
mounted to swing on a substantially vertical
between the wheels 2', 3’.
axis, means connected to one of said wheels of
The connections between the arms 9' prefer
each pair for operating it in either direction,
ably consist of the following: 20 indicates a
operating connections between the wheels of each
housing suitably supported on the vehicle chassis
pair arranged to swing both of said Wheels in
and providing an elongated bearing for a trans
the same direction when operated for steering
verse rock shaft 20a the opposite ends of which
the vehicle, said connections for each pair of
are provided with cranks 2|, which normally
extend in the same direction - relative to the 50 wheels consisting of links pivotally connected at
their outer ends to said wheels and connecting
shaft, preferably vertically upwardly. The outer
means between the inner ends of said links op
end of each crank 2| is pivotally connected to
erable to move the latter endwise relative to each
the inner end of a rod ID’, the outer end of which
other during operation of said operating con
is pivotally connected to the adjacent arm 9'.
The crank 2| at one side is also connected to a 65 nections between said pair of wheels, whereby
one wheel of each pair is caused to swing through
link 22v which is suitably connected through suit
a larger'angle than that of the other wheel of
able mechanism in a casing 22' to a steering
the pair, and operating connections between one
column Ila’ having a wheel [2’.
wheel of each pair of wheels and a wheel of the
To those skilled in the art to which my in-‘
vention relates many changes in construction 60 other pair of wheels arranged, in each steering
and widely diifering embodiments and applica
tions of, the invention will be apparent without
operation, to simultaneously swing' said pairs of
wheels in opposite directions.
5. In a vehicle as claimed in claim 4 wherein
departing from the spirit and scope thereof.
is provided a cam‘ having lateral portions pre
My disclosures and description herein are purely
determinately related to a vertical plane parallel
illustrative and not intended to be in any sense 65 to the normal axes of each pair of wheels for
limiting.
guiding one of' the links connected to the adja
'What I claim is:
cent pair of wheels during movement thereof,
1. In a vehicle, comprising a frame and front
one wheel thereof relative to the other wheel
and rear supporting wheels for the frame, the
of the pair, whereby said one link will swing
70
wheels at one end of said frame being mounted
one wheel at a greater angle.
thereon to swing on substantially vertical axes
6. In a vehicle comprising a frame, a pair of
to effect steering, of the vehicle, means opera
supporting wheels adjacent one end of said
tively connected to one of said swingable wheels
frame, an axle at the opposite end of said frame,
for swinging it from normal position in either
a pair of dirigibie supporting wheels mounted
direction, and connections between the wheel 75
9
10
.
‘
-
,on the opposite ends of said axle, means con- ‘
said guides, a bell crank, one arm of which is
nected to one of said dirigible wheels for operat
ing it in either direction, arms ?xedly related
to the spindles for said dirigible wheels, and
push and pull connections between and con-‘
nected to said arms operable‘to swing both of
pivotally connected to said device, the inner
end of the other link being pivotally connected
to said bell crank intermediate its ends and the "
other arm of said bell crank being provided with
a device slidably engaging theother guide, the
last mentioned guide having lateral portions dis
posed at different angles relative to said ?rst
said wheels in either direction, an intermediate
element of said connections being movable rela
tive to the elements thereof connected to said
mentioned guide, and means connected to one
arms to control the movements of the last men 10 of said dirigible wheels for swinging it in either
tioned elements, one. relatively faster or slower
direction.
than the other wheel dependent upon the direc
10. In a vehicle, the combination with a frame
tion of swinging movement of said operated
and front and rear supporting wheels for said
wheel.
‘
frame, the wheels at one end of said frame being
7. In a vehicle comprising a frame, a pair of 15 mounted thereon to swing on substantially verti- ,
supporting wheels adjacent one end of said
cal axes, of means operatively connected to one
frame, an axle at the opposite end of said
of said swingable wheels for swinging it from ‘
frame, a pair of , dirigible supporting wheels
normal position in either direction, connections mounted on the opposite ends of said axle,
between the wheel connected to said swinging
arms ?xedly ‘related to the spindles for said 20 means and the other swingable wheel for swing-,
last mentioned wheels, and differential con
ing the latter from normal position in either
nections between said arms operable to swing
direction, whereby both swingable wheels swing
both of said wheels in either direction-one rela
in- the same direction when operated for steer
tively faster or slower than-the‘other-wheel de-. ‘
ing the vehicle on curvilinear lines of travel, said
pendent upon the direction. of swinging ih'iove as connections consisting of a pair of links disposed
ment thereof, differential‘ connections consisting
of a plate ?xed‘ to said axle and provided with
guides, links pivotally connected attheir outer
one of said swingable wheels and an intermediate
ends to said arms and each extending therefrom
link pivoted at its opposite ends to the inner
substantially transversely of the vehicle frame
and each pivotally connected at its outerend to
toward the other arm, a device on the inner end 30 ends of said ?rst mentioned links, said inter
of one of said'links slidably engaging one of said
guides, a connector pivotally connected to the
inner ends of said links, and-a device on said
connector spaced from its connection with the
other link slidably engaging the other guide, the
?rst mentioned guide extending transversely of
said frame and the last mentioned guide having
lateral portions disposed at different angles to
mediate link being provided with an arm form
ing an extension of one of said first mentioned
links, and means-for guiding the outer end of said
arm laterally during thrust or pull on said ?rst
mentioned links through said intermediate ele
ment to e?ect relative movement between said
?rst mentioned links, one of said links faster or
slower than the other link dependent’ upon the
direction in which said swingable wheels are
said ?rst mentioned guide, and means connected
to one of said dirigible wheels for swinging said 40 operated, whereby said swingable wheels in any
wheels in either direction.
steering position are in different angular rela
tion.
,.
8. A vehicle comprising a frame, a pair of sup
porting wheels adjacent each end of said frame,
11. In a vehicle, the combination with a frame
the wheels of one pair being dirigibly mounted
and front and rear supporting wheels for said
on said frame in spaced relation, means con
frame,'the wheels at one end of said frame being
nected to one of said dirigible wheels for operat
mounted thereon to swing on substantially verti
ing it in either direction, and connections be
cal axes to effect steering of the'vehicle, means
tween said dirigible wheels and said frame op
operatively connected to one of said swingable
erable to swing them together in either direction
wheels for swinging it from normal position in
and simultaneously control the movement of one 50 either direction, connections'between the swing
wheel faster or slower than the other wheel de-,
able wheel connected to said swinging means _
pendent upon the direction of swinging move
and the other swingable wheel for swinging the
' ment of said dirigible wheels, said connections
other wheel from normal position~ in either direc
consisting of a pair of relatively movable links
tion, whereby both swingable wheels swing in‘
pivotally connected at their outer‘ ends to said 55 the same direction when operated for steering
dirigible wheels, an element between and piv
the vehicle on curvilinear lines of travel, said
otally connected to the inner ends of said links
connections consisting of a pair of links disposed
and means carried by said frame for guiding
substantially! transversely of said frame and
said element during movement of said links to /
each pivotally connected at its outer end to one
control the relative movement thereof.
00 of said swingable wheels and an intermediate
9. In a vehicle comprising a frame, a pair of
link pivotally connected to the inner ends of
supporting wheels adjacent one end of said
said ?rst mentioned links and arranged to trans
frame, a pair of dirigible supporting wheels ad
mit thrust or pull from one of said ?rst men
jacent the opposite ends of said frame, connec-,
tioned links to the other ?rst mentioned link,
tions between said dirigible wheels and said 65 whereby both wheels swing in either direction
frame operable to swing said wheels together in
either direction and simultaneously control the
movement of one wheel faster or slower than
_ when said swinging means are operated, said
intermediate link being operable during swing
ing of said swingable wheels to permit relative
the other wheel dependent upon the direction
movement between said ?rst mentioned links,
of swinging movement thereof, the connections 70 and means for controlling the movement of said
between said dirigible wheels consisting of a
plate mounted on said frame and provided with
guides, a link pivotally connected at its outer.
end to each of said wheels, a device on the inner
end of one of said links slidably engaging one of 7
I
intermediate link to effect slower or faster move
ment of one of said ?rst mentioned links rela
tive to the other ?rst mentioned link, dependent
upon the direction of swinging movement of said
swingable wheels at either’side of their normal
2,411,570.
-
11
12
position, whereby said wheels in any steering
position are disposed in di?erent angular rela;
positions, said last mentioned connections con
tion relative to their normal position.
12. In a vehicle comprising a frame, dirigible
on a substantially vertical axis torespectively
connected at their outer ends‘ to said spaced
wheels and a link pivotally connected to the
inner ends of said transversely arranged links
and operable to permit said transversely ar
ranged links to move endwise relative to each
different angular positions, connections between
4 other, and operating means connected'to said
sisting of transversely arranged links plvotally
supporting wheels disposed adjacent the opposite
ends thereof, each wheel being mounted to swing
first mentioned connections arranged to swing
at the opposite end thereof for simultaneously 10 said wheels to angular positions and to simul
taneously swing all of the wheels to their re
swinging them in opposite directions, the wheels
a wheel at one end of said frame and a wheel
at one end of said frame being spaced, connec
spective angular positions.
tions between said spaced wheels adapted to
swing them in the same direction into steering
,
‘
PAUL E. HAWmNS.
Certi?cate of Correction
November 26, 1946.
Patent No. $411,570.
PAUL E.‘ HAWKINS
' It is hereby certi?ed that error appears in the printed speci?cation of the above
numbered atent re uiring correction as follows: Colunm 9, line 26, claim -7, before
the word ‘gii?erentigl” insert said; and that the said Letters Patent should be read
with this correction therein that the same may conform to the record of the case 1n
the Patent Oi?ce.
Signed and sealed this 25th day of February, A. D. 1947.
[w] '
LESLIE FRAZER,
First Assistant Gommissioner of Patents.
Документ
Категория
Без категории
Просмотров
0
Размер файла
1 059 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа