U.S. patent application number 11/691507 was filed with the patent office on 2008-10-02 for four-wheel drive model car.
Invention is credited to Min-Xiong ZHENG.
Application Number | 20080242194 11/691507 |
Document ID | / |
Family ID | 39795256 |
Filed Date | 2008-10-02 |
United States Patent
Application |
20080242194 |
Kind Code |
A1 |
ZHENG; Min-Xiong |
October 2, 2008 |
FOUR-WHEEL DRIVE MODEL CAR
Abstract
A miniature gasoline engine is installed at the rear section of
the model car. A first transmission gear is connected to and driven
by the axle of the miniature gasoline engine, which in turn engages
a parallel, second transmission gear, which is mounted at an end of
a first transmission axle. A first bevel gear is provided at the
other end of the first transmission axle, which engages a
perpendicular, second bevel gear. The second bevel gear is
connected to a center differential located in the center of the
model car which in turn drives a second transmission axle (i.e.,
the main transmission axle). The second transmission axle runs
through the center differential and axially through the model car,
and directly drives the two front wheels and the two rear wheels,
respectively.
Inventors: |
ZHENG; Min-Xiong; (Dong Guan
City, CN) |
Correspondence
Address: |
LEONG C LEI
PMB # 1008, 1867 YGNACIO VALLEY ROAD
WALNUT CREEK
CA
94598
US
|
Family ID: |
39795256 |
Appl. No.: |
11/691507 |
Filed: |
March 27, 2007 |
Current U.S.
Class: |
446/461 |
Current CPC
Class: |
A63H 17/262 20130101;
A63H 29/22 20130101; A63H 30/04 20130101 |
Class at
Publication: |
446/461 |
International
Class: |
A63H 17/00 20060101
A63H017/00 |
Claims
1. A four-wheel drive model car having a gasoline engine, two front
wheels, two rear wheels, a center differential, a front different
differential, a back differential, a front suspension system, a
back suspension system, a front coupling, and a back coupling,
comprising: a first transmission gear connected to and driven by
the axle of said gasoline engine installed at the rear section of
said model car; a first transmission axle; a parallel, second
transmission gear at an end of said first transmission axle and
engaged by said first transmission gear; a first bevel gear at the
other end of said first transmission axle; a second bevel gear
engaged by said first bevel gear and connected to said center
differential; and a second transmission axle driven by said center
differential running axially through said model car, the two ends
of said second transmission axle driving said two front wheels and
said two rear wheels, respectively, through said front and rear
couplings, differentials, and suspension systems of said model
car.
2. The four-wheel drive model car according to claim 1, wherein
said first bevel gear and said second bevel gear are
perpendicular.
3. The four-wheel drive model car according to claim 1, wherein
said first transmission gear and said second transmission gear are
engaged for speed reduction.
4. The four-wheel drive model car according to claim 1, wherein
said center differential is located in the center of said model
car.
Description
TECHNICAL FIELD OF THE INVENTION
[0001] The present invention generally relates to model cars, and
more particularly to a model car having a four-wheel driving
system.
DESCRIPTION OF THE PRIOR ART
[0002] Existing remote-control model cars have their rear wheels
driven by a miniature gasoline engine. The front wheels on the
other hand are connected to the steering mechanism of the model car
for direction control. These remote-control model cars are simple
to manufacture and operate rather smoothly over flat surfaces.
However, for bumpy or steep surfaces, their performance and
reliability are less than satisfactory. In addition, these
rear-wheel driven model cars are slower and more difficult to
control.
SUMMARY OF THE INVENTION
[0003] As such, a four-wheel drive model car is provided herein to
overcome the disadvantages of the prior arts.
[0004] According to the present invention, a miniature gasoline
engine is installed at the rear section of the model car, which
provides a reasonable center of gravity to the model car and
therefore a reliable operation. The transmission assembly is
configured such that the main transmission axle runs axially
through the model car and directly drives the two front wheels and
the two rear wheels, respectively, through the couplings, front and
rear differentials, and the suspension systems.
[0005] A first transmission gear is connected to and driven by the
axle of the miniature gasoline engine, which in turn engages a
parallel, second transmission gear, which is mounted at an end of a
first transmission axle. A first bevel gear is provided at the
other end of the first transmission axle, which engages a
perpendicular, second bevel gear. The second bevel gear is
connected to a center differential located in the center of the
model car which in turn drives a second transmission axle (i.e.,
the main transmission axle) running through the center
differential.
[0006] The foregoing object and summary provide only a brief
introduction to the present invention. To fully appreciate these
and other objects of the present invention as well as the invention
itself, all of which will become apparent to those skilled in the
art, the following detailed description of the invention and the
claims should be read in conjunction with the accompanying
drawings. Throughout the specification and drawings identical
reference numerals refer to identical or similar parts.
[0007] Many other advantages and features of the present invention
will become manifest to those versed in the art upon making
reference to the detailed description and the accompanying sheets
of drawings in which a preferred structural embodiment
incorporating the principles of the present invention is shown by
way of illustrative example.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 is a schematic diagram showing the transmission
assembly of a four-wheel drive model car of the present
invention.
[0009] FIG. 2 is a top view showing the model car equipped with the
transmission assembly of FIG. 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0010] The following descriptions are exemplary embodiments only,
and are not intended to limit the scope, applicability or
configuration of the invention in any way. Rather, the following
description provides a convenient illustration for implementing
exemplary embodiments of the invention. Various changes to the
described embodiments may be made in the function and arrangement
of the elements described without departing from the scope of the
invention as set forth in the appended claims.
[0011] FIG. 1 is a schematic diagram showing the transmission
assembly of a four-wheel drive model car of the present invention.
A first transmission gear 1 shown in the diagram is connected to
and driven by the axle of a miniature gasoline engine (not shown).
The transmission gear 1 in turn engages a parallel, second
transmission gear 2 which is mounted at an end of a first
transmission axle (not numbered) for speed reduction. A first bevel
gear 3 is provided at the other end of the first transmission axle,
which engages a perpendicular, second bevel gear 4. The second
bevel gear 4 is connected to a center differential (not numbered)
which in turn drives a second transmission axle 5 which runs
through the center differential. The two ends of the second
transmission axle 5 then drive the two front wheels and the two
rear wheels, respectively, through the couplings, front and rear
differentials, and the suspension systems.
[0012] FIG. 2 is a top view showing the model car equipped with the
transmission assembly of FIG. 1, which is located at where the
circle A is marked. The miniature gasoline engine is installed at
the rear section of the model car, which provides a reasonable
center of gravity to the model car. The transmission assembly of
FIG. 1 is configured such that the second transmission axle 5 runs
axially through the model car and the center differential is in the
center of the model car.
[0013] The configuration of the miniature gasoline engine and the
transmission assembly provide a highly reliable operation to the
model car over various types of terrains. In addition, the axially
aligned second transmission axle provides powerful and highly
efficient driving to the four wheels so that the model car can run
at great speeds with superior maneuverability.
[0014] It will be understood that each of the elements described
above, or two or more together may also find a useful application
in other types of methods differing from the type described
above.
[0015] While certain novel features of this invention have been
shown and described and are pointed out in the annexed claim, it is
not intended to be limited to the details above, since it will be
understood that various omissions, modifications, substitutions and
changes in the forms and details of the device illustrated and in
its operation can be made by those skilled in the art without
departing in any way from the spirit of the present invention.
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