U.S. patent number 3,752,246 [Application Number 05/157,561] was granted by the patent office on 1973-08-14 for racing car.
This patent grant is currently assigned to Sullivan Products, Inc.. Invention is credited to Matthew A. Sullivan.
United States Patent |
3,752,246 |
Sullivan |
August 14, 1973 |
RACING CAR
Abstract
A radio control racing car having a resilient suspension system
which is adjustable is provided. The wheels of the car are
permitted to flex substantially independently of each other with a
positive control provided for the amount of flexibility of each
wheel. A motor mount is provided which permits the motor to be
fixedly clamped into its desired operative position.
Inventors: |
Sullivan; Matthew A. (Elkins
Park, PA) |
Assignee: |
Sullivan Products, Inc. (Willow
Grove, PA)
|
Family
ID: |
22564276 |
Appl.
No.: |
05/157,561 |
Filed: |
June 28, 1971 |
Current U.S.
Class: |
180/56; 180/297;
280/788; 446/469; 267/160 |
Current CPC
Class: |
A63H
17/262 (20130101); B60G 2300/20 (20130101) |
Current International
Class: |
A63H
17/00 (20060101); A63H 17/26 (20060101); A63h
017/26 () |
Field of
Search: |
;180/11,62,64R,56
;280/16.5R ;46/206,221,222,223,243LV,243P,244R,244B ;267/158,160
;248/3,361B |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
1,040,369 |
|
Aug 1966 |
|
GB |
|
761,648 |
|
Nov 1956 |
|
GB |
|
982,125 |
|
Feb 1965 |
|
GB |
|
1,272,043 |
|
Aug 1961 |
|
FR |
|
Primary Examiner: Hersh; Benjamin
Assistant Examiner: Paperner; Leslie J.
Claims
I claim:
1. A racing car comprising a chassis having a main body portion, a
front segment and a rear segment, said car having front wheels and
rear wheels the front segment of the chassis supporting the front
wheels of the racing car, the rear segment of the chassis
supporting the rear wheels of said racing car, means on said
chassis for resiliently mounting the front wheels of said racing
car, said means including the least said front chassis segment
being composed of highly flexible resilient material and means for
varying the flexibility of said resilient means for each of the
front wheels of the racing car, said means for varying the
flexibility of each of the front wheels of the racing car including
slots within said front chassis segment and locking means in said
slots to vary the effective length of said slots thereby varying
the flexibility of each of said front wheels substantially
independently.
2. A racing car as set forth in claim 1 including means for
resiliently mounting the rear wheels of said car, said rear chassis
segment being composed of highly flexible resilient material, slots
in said rear chassis segment to substantially independently
flexibly mount the rear wheels of said car, and locking means
cooperating with said slots to permit varying the effective length
of said slots and thereby independently varying the flexibility for
each of said rear wheels.
3. A racing car set forth in claim 1 including a motor mount
secured to said rear chassis segment, said motor mount including an
axle housing formed integrally therewith, said motor mount having
positive clamping means associated therewith for locking an engine
to said motor mount.
4. A racing car having front and rear wheels including a chassis
having a main body portion, a rear chassis segment, and a front
chassis segment, at least said front and said rear chassis segments
being composed of highly flexible resilient material, means in said
front chassis segment for substantially independently resiliently
supporting each of the front wheels of the racing car, means for
varying the amount of resiliency for each of the front wheels of
the racing car, said means including slots in said front chassis
segment, and locking means in each of said slots for varying the
effective length of each slot to thereby vary the flexibility of
each of the front wheels substantially independently.
5. A racing car as set forth in claim 4 including a motor mount
secured to and supported by the rear chassis segment, said motor
mount having a rear axle housing formed integral therewith, said
motor mount including clamping means for positively locking an
engine into its desired operative position, slots in said rear
chassis segment for permitting the rear wheels of the racing car to
be substantially independently resiliently mounted, said slots
being on opposite sides of said motor mount, and locking means in
the slots to vary the effective length of each of said slots
independently.
6. A racing car as set forth in claim 4 wherein said chassis main
body is composed of a relatively rigid high strength metal and said
front and rear chassis segments are composed of highly flexible
resilient plastic material.
7. A racing car having front and rear wheels and a chassis for
supporting said wheels including a motor mount secured to said
chassis, said motor mount having a bottom wall and side walls
extending upwardly therefrom defining a cavity for receiving an
engine, said bottom wall being adapted to support an engine, said
motor mount including spaced intermediate horizontal planar
surfaces, said motor mount including spaced top horizontal wall
surfaces spaced from said horizontal planar surfaces, clamping
means adapted to be secured to said top wall surfaces for securing
flanges of the engine between said clamping means and said
intermediate planar surfaces, said motor mount having a rear axle
housing formed integrally therwith, said rear axle housing
supporting the rear axle which supports the rear wheels of said
racing car.
8. A racing car as set forth in claim 7 wherein one of said top
horizontal planar wall surfaces is formed by cutting away a portion
of said rear axle housing.
9. A racing car as set forth in claim 7 wherein the side walls of
said motor mount have C-shaped grooves formed therein to permit the
cavity provided by the motor mount to be readily enlarged so that
the motor mount may be adapted to receive engines of increased
size.
Description
The present invention relates generally to a radio control racing
car and more specifically to a radio control racing car having an
adjustable flexible suspension system and a motor mount for
positively clamping the motor into its desired operative
position.
Radio control racing cars are becoming increasingly popular. The
cars are usually manufactured on a one-eighth scale wherein 11/2
inches is equal to one foot. There are numerous problems in the
design of such cars which may be operated at speeds well in excess
of 35 miles an hour.
Due to the small size of the cars and the high speeds which the
cars attain, problems have arisen with respect to the suspension
systems thereof and the means for accurately and positively
clamping the motor therein.
In general, manufacturers of radio control racing cars have
provided maximum rigidity for the chassis of such cars.
Accordingly, sustantially rigid high-strength metals have been
utilized in most prior art radio control racing cars.
Unfortunately, the rigidity of the chassis renders the racing car
extremely vulnerable should the car hit a pebble, enter into a turn
at maximum speed, bounce, or the like. Should the car crash or roll
over at high speed, serious damage can occur to the structure of
the car.
It is also important to insure that the motor is clamped or dogged
firmly in the desired operative position so that a constant driving
engagement for the wheels of the racing car can be provided.
It is an object of the present invention to provide an improved
suspension system and motor mount means for a radio control racing
car.
It is another object of this invention to provide a less complex
radio control racing car suspension system which can accommodate
bounces, pebbles, and like obstructions without permanent damage
occurring to the car.
It is a further object of the present invention to provide a radio
control racing car which can provide for sustantially independent
flexing of each wheel of the car.
It is yet another object of the present invention to provide a
radio control racing car which includes a motor mount having an
integral axle housing secured thereto and includes positive means
for clamping a motor in the desired operative position.
It is another object of the present invention to provide a radio
control racing car which has a motor mount which is adapted to
accurately accommodate a standard 0.19 cubic inch displacement
motor and which can be modified to accommodate motors of varying
sizes.
Other objects will appear hereinafter.
The above and other objects are accomplished by means of the
present invention. A radio control racing car is provided having an
adjustable resilient suspension system. The chassis of the racing
car is preferably composed of high-strength flexible plastic.
Suitable materials include Lexan, glass filled nylon, and the like.
The material selected should be flexible, should not warp, should
be able to withstand high temperatures and should be capable of
being molded into a desired shape.
It is not necessary that the entire chassis be composed of flexible
material. However, the portion of the chassis which supports the
wheels must have the desired flexibility.
Means are provided for adjusting the flexibility of each wheel of
the racing car. Adjustability is important when a car is raced on a
track having all right hand or all left hand turns. Additionally,
each car's individual characteristics can be accommodated by trial
and error by varying the flexibility of each wheel.
A conventional two channel radio is provided for operating the
radio control racing car. One channel may be used to effect
steering of the car while the other channel may be used for braking
and throttle control.
A motor mount which may be an aluminum extrusion having the rear
axle support integral therewith is secured to the chassis. The
motor, which is generally a Class A 0.19 cubic inch displacement
engine is adapted to be inserted into an opening in the motor mount
and shimmed into its desired position. Thereafter, the motor will
be positively clamped to the motor mount to prevent movement
thereof.
The one-piece extrusion motor mount will also serve to absorb
vibration. The flexible suspension and the motor mount will
cooperate to prevent the conventional radio receiver mounted on the
chassis from being sustantially affected by vibrations.
To accomplish the flexibility of the suspension system, slots may
be provided in the chassis. The slots, which may be of any desired
configuration, will provide increased flexibility for the portion
of the chassis supporting each wheel. In effect, each portion of
the chassis is hinged to the main body chassis by reason of the
slots. The flexibility of the suspension system can be varied by
positioning a nut and bolt to vary the length of each slot.
For the purpose of illustrating the invention there is shown in the
drawings forms which are presently preferred; it being understood,
however, that this invention is not limited to the precise
arrangements and instrumentalities shown;
FIG. 1 is a perspective view of one embodiment of a radio control
racing car embodying the features of the present invention and
having portions broken away for added clarity;
FIG. 2 is a top plan view of another embodiment of a radio control
racing car embodying the features of the present invention;
FIG. 3 is a section view taken along lines 3--3 of FIG. 2;
FIG. 4 is a enlarged section view taken along lines 4--4 of FIG.
2;
FIG. 5 is a perspective view of the motor mount of the present
invention wherein the engine is adapted to be mounted behind the
wheels; and
FIG. 6 is a top plan view of an alternative slot arrangement which
could be used for flexibly mounting either the front or the rear
wheels of the racing car.
Referring now to the drawings in detail wherein like numerals
indicate like elements throughout the several views there is shown
in FIG. 1 a racing car generally indicated by the reference numeral
10.
Racing car 10 includes a chassis 12 which is composed of a
high-strength flexible plastic. Suitable materials include Lexan,
glass filled Lexan and glass filled nylon.
It is possible that metal having a high degree of flexibility could
also be utilized. The material selected for the chassis 12 should
be flexible, should not warp, and should be able to withstand high
temperatures. When a plastic is utilized, it should be capable of
being molded into the desired shape.
FIGS. 2-4 are directed to another embodiment of a racing car which
is substantially identical to racing car 10. The only difference in
the embodiment of FIGS. 2-4 relates to details of the chassis
construction. Therefore, for ease of understanding the same
reference numerals will be used to indicate identical structure in
the embodiments of FIG. 1 and FIGS. 2-4. The differences between
the two embodiments which relate to details of chassis construction
will be discussed in detail hereinafter.
A motor mount 14 is adapted to be secured to chassis 12. The motor
mount may be formed of an aluminum extrusion and preferably has a
rear axle housing 16 formed integrally therewith. The motor mount
14 is connected to a rear chassis segment 18 which is formed by
slots 20 and 22. Motor mount 14 will be discussed in greater detail
hereinafter.
Axle housing 16 provides bearing support for rear axle 24 to which
rear wheel 26 and 28 are fixedly secured. Driven gear 30 is also
fixedly secured to axle 24 by means of a suitable screw 32 through
gear hub 34.
A front chassis segment 36 is formed by slots 38 and 40. The front
chassis segment 36 supports stampings 42 and 44 which in turn
support front wheels 46 and 48 of racing car 10. As set forth
above, the racing car set forth in the embodiment depicted in FIGS.
2-4 is substantially identical to racing car 10. The only
difference between the racing car of FIGS. 1 and 2 is the chassis
construction. In FIG. 1, a unitary chassis having slots 20, 22 38
and 40 is provided. In FIG. 2, there is a main chassis portion 100
and separate and distinct rear and front chassis segments 102 and
104, respectively, which are secured to the main chassis 100.
The stampings 42 and 44 are secured to the front chassis segment 36
by means of bolts 50 which extend through the bottom of the chassis
segment 36, lower stamping 44, spacers 52, upper stamping 42, and
receive nuts 54 on the ends thereof. The stampings 42 and 44 have
openings adjacent the ends thereof to receive king pins 56 and 58.
The king pins are recessed into the front wheels 46 and 48 in order
to improve the steering characteristics of the racing car 10. The
king pins have stub axles secured thereto only one of which is
shown in the drawing. Stub axle 60 may be secured to wheel 48 in
any desired conventional manner.
Steering of front wheels 46 and 48 is effected through a control
link 62 which is fixedly secured to track arm 64. Track arm 64 is
fixedly secured to king pin 58 to cause movement thereof. A tie rod
66 is fixedly secured to the end of track arm 64 remote from
control link 62. Tie rod 66 is secured at its other end to track
arm 68. Track arm 68 is secured to king pin 56 to insure that
wheels 46 and 48 turn as a unit.
Control link 62 is caused to move in response to signals received
by the receiver (not shown) which will be mounted on chassis 12. A
conventional two channel transmitter may be used to transmit
signals to racing car 10. As is conventional, one channel controls
the steering while the second channel controls braking of the
racing car.
In the one piece chassis body construction of FIG. 1 slots 38 and
40 permit front chassis seqment 36 to be highly flexible. The
flexibility of the plastic material of chassis 12 is therefore
further enhanced by slots 38 and 40. However, it is often desirable
to control the flexibility of each wheel independently. This is
especially true if the racing car is to be raced on a track having
only right hand or only left hand turns.
Accordingly, bolts 70 and 72 pass through slots 38 and 40 and are
secured to suitable threaded nuts which engage the lower surface of
the chassis. The bolts 70 and 72 and the nuts associated therewith
may be positioned anywhere along the slots 38 and 40 to thereby
vary the effective length of such slots. Further, the shape of the
slots 38 and 40 may be varied as desired.
In FIG. 6 a modified slot configuration is shown. As shown, angled
slots 74 and 76 are provided in chassis segment 36. Control bolts
70 and 72 could also be used in slots 74 and 76 to vary the
effective length of such slots.
Referring now to the embodiment of FIGS. 2-4 and more particularly
to the difference in chassis design with respect to the embodiment
of FIG. 1, the chassis 200 is notched at the front and rear
portions thereof. Rear chassis segment 202 extends along the
underside of chassis 200 and is secured to chassis 200 by suitable
bolts 206. The chassis segment 202 is preferably composed of the
same material as chassis 12 of racing car 10.
Chassis 200 may be composed of less flexible metal. Chassis segment
204 is secured to the underside of chassis 200 by suitable bolts
208. Chassis segment 204 is preferably composed of flexible
material identical to that of chassis 12 of racing car 10. Since
chassis segments 202 and 204 support the wheels of the racing car,
the desired flexibility for each of the wheels is maintained. The
dimensions of segment 204 are such that upon securing the segment
to the underside of chassis 200, slots 2l0 and 212 are formed by
the outer edges of the segment 204 and the inner edges of the notch
in the chassis 200.
The bolts 70 and 72 may be used to vary the effective length of
slots 210 and 212. As can be seen in FIG. 3, bolt 70 extends
through a suitable washer 214 and has a nut 216 secured to its
lowermost end. Also shown in FIG. 3 is a nut 218 which is secured
to bolt 208 for attaching front segment 204 to chassis 200.
Rear chassis segment 202 is also of such a size with respect to the
notch in chassis 200 so as to form slots 220 and 222. The effective
length of slots 220 and 222 may be varied by using bolts such as 70
and 72 therein. Accordingly, varied flexibility can be provided for
the rear wheels 26 and 28 of the racing car.
The same motor mount 14 is used in the embodiment of FIG. 1 and the
embodiment of FIGS. 2-4. The motor mount 14 may be secured by
suitable fastening means 80 to the rear chassis segment of the
racing car. The motor mount is adapted to positively retain the
engine 82 and the parts associated therewith in its desired
operative position. The engine 82 is a conventional Class A 0.19
cubic inch displacement engine. Any other desired engine may also
be used for powering the racing car.
Motor mount 14 has a bottom wall 84 and side walls 86 and 88. The
side walls 86 and 88 are provided with C-shaped grooves 90 and 92
the purpose of which will be explained in detail hereinafter.
Motor mount 14 includes horizontal planar surfaces 94 and 96 which
have tapped holes 98 and 100 therein. A top horizontal planar wall
surface 102 is spaced from planar surface 94. The motor mount 14
includes axle housing 16 formed integrally therewith. Preferably,
motor mount 14 and axle housing 16 are a unitary aluminum
extrusion.
Axle housing 16 is cut away at 104 to form top horizontal planar
wall surface 106 which is spaced from horizontal planar surface 96.
Clamping members 108 and 110 are provided for positively locking
the engine 82 in its desired operative position. As stated
hereinabove, engine 82 is conventional and forms no part of the
present invention. Accordingly, the details of the engine will not
be discussed herein in detail.
As is conventional, engine 82 includes flanges 112 and 114
integrally formed therewith. The vertical distance between
horizontal planar surface 94 and top horizontal planar wall surface
102 is the same as the thickness of flange 112. Likewise, the same
relationship exists with respect to horizontal planar surface 96,
top horizontal planar wall surface 106 and flange 114.
Clamp 108 engages top horizontal planar wall surface 102 and flange
112. A suitable bolt 116 which cooperates with tapped hole 98 is
adapted to pass through clamp 108 to thereby retain flange 112 and
engine 82 in its desired disposition. Similarly, a bolt 118 is
adapted to cooperate with tapped hole 100 and passes through clamp
110 to retain flange 114 and engine 82 in its desired disposition.
However, before the engine 82 is clamped in its desired disposition
shims 120 and 122 may be used to provide substantially perfect
alignment for engine 82. Engine 82 includes a flywheel 124, a
clutch assembly 126 and a power or drive gear 128 operatively
associated therewith. Engine 82 is placed in engine mount 14 so
that the bottom thereof rests upon bottom wall 84. The flanges 112
and 114 will also rest upon horizontal planar surfaces 94 and 96.
The engine will be shimmed by suitable shims 120 and 122 to insure
a constant interengagement between drive gear 128 and driven gear
30. Thereafter, the engine will be clamped into its desired
operative position by clamps 108 and 110.
As stated hereinbefore, the gear 30 drives axle 24. The wheels 26
and 28 are also secured to axle 24 and rotate therewith.
A suitable throttle adjustment 130 is provided for engine 82.
Additionally, cooling fins 132 can be provided for the engine. The
receiver (not shown) is adapted to be mounted on the chassis of the
racing car in any desired manner. A suitable body, also not shown,
is conventionally mounted over the chassis and secured thereto.
FIG. 5 shows the engine mount 14 in a rear engine mount
disposition. In this disposition, the wheels 26 and 28 will be in
front of engine 82. Accordingly, engine mount 14 is sufficiently
versatile to permit the weight of the engine to be in front of or
behind wheels 26 and 28 depending upon the desired weight
distribution for the racing car.
The C-shaped grooves 90 and 92 are provided to permit larger size
engines to be received in motor mount 14. If a larger engine is to
be received in motor mount 14, it is merely necessary to file away
the remaining portions of side walls 86 and 88 to accomodate such
larger engine.
The present invention may be embodied in other specific forms
without departing from the spirit or essential attributes thereof
and, accordingly, reference should be made to the appended claims,
rather than to the foregoing specification as indicating the scope
of the invention.
* * * * *