Land vehicles – Wheeled – Running gear
Reexamination Certificate
2002-08-12
2004-04-06
Dickson, Paul N. (Department: 3616)
Land vehicles
Wheeled
Running gear
C446S468000, C301S132000
Reexamination Certificate
active
06715776
ABSTRACT:
BACKGROUND OF THE INVENTION
(a) Field of the Invention
The invention relates to an improved wheel securing structure for a remote-controlled model car, more particularly to a wheel securing structure that is not likely to loosen, mainly having screws extending through in an ingenious manner, and cooperating with a combination of other relevant components to prevent slippage thereof due to vibration, thereby reducing excessive screw tapping steps in the prior art and improving the manufacturing process.
(b) Description of the Prior Art
For remote-controlled model cars, the wheel securing structure thereof is very important. This is because, if the structure design is not good, the locking screws may become loosened when the model car moves up and down slopes, bounce, or is subjected to prolonged operation. If the screws slip during operation of the model car, the wheels will slant, and the game or contest will have to be stopped. A conventional wheel steering structure for a model car is shown in
FIGS. 4 and 5
, and is mainly provided with a steering seat
60
accommodating a universal connector therein, and having a linkage rod
61
extending therefrom. Upper and lower ends of the housing thereof are respectively provided with screw holes
62
. There is further provided a substantially U-shaped securing frame
70
with a central plate provided with a middle hole
71
, and upper and lower plates respectively provided with side holes
72
. The steering seat
60
is disposed in the center of the U-shaped structure of the securing frame
70
, with the linkage rod
61
thereof passing through middle hole
71
of securing frame
70
to be connected to other structural elements (not discussed in detail herein). Screw holes
62
of steering seat
60
align with side holes
72
of securing frame
70
. A respective screw
80
passes through a respective bushing
90
and then through side hole
72
to be locked in screw hole
62
of the housing of steering seat
60
. Described above is the conventional structure.
However, when the above-described conventional structure is in actual use, vibration is inevitable, and the screw
80
locks only the screw hole
62
of steering seat
60
. Therefore, the screw
80
easily becomes loosened. Once the rear end of screw
80
disengages from the screw hole
62
, then steering seat
60
, securing frame
70
, two screws
80
and two bushings
90
will become loosened and slant, or even scatter around, without any warning. Besides, with the components scattered around, it is very troublesome to reassemble. This is a common problem of the conventional structure, and is what the industry wants to eliminate.
In addition, providing screw holes
62
on steering seat
60
is inconvenient during processing. If there is any damage, all the materials cannot be used. Therefore, the faulty product rate cannot be effectively reduced. This is another disadvantage of the conventional structure.
SUMMARY OF THE INVENTION
Therefore, the main object of the invention is to provide a wheel securing structure that does not easily become disengaged due to vibration, the concrete structure of which can be achieved in this manner:
A steering seat is provided. The center thereof is provided with a receiving recess for mounting of universal connector, linkage rod and a number of locking elements therein. There is further provided a substantially U-shaped securing frame with a central plate provided with a middle hole, and upper and lower plates provided respectively with side holes. The steering seat is disposed in the center of the U-shaped structure of securing frame, with linkage rod passing through middle hole of securing frame to be connected to other structural elements, and cooperating with a screw and bushing to permit steering seat to be mounted on securing seat. Upper and lower opposite ends of receiving recess of the housing of steering seat are respectively provided with slightly protruding hole seats, which are centrally provided with through holes. Inner side surface of through hole of the hole seat is provided with a respective positioning groove having cut edges. Two screws are respectively formed with flat edges at head portions thereof, and can extend from inner side of steering seat through outer end of through hole, the screw having the flat edges thereof embedded in positioning groove at the same time. The other end of the screw passes through side hole of securing frame, and is fitted with a bushing as bearing, and has a nut fitted thereon to secure the assembly tightly. At the same time, there is no need for drilling excessive screw holes. Such is the feature of the invention.
REFERENCES:
patent: 3563564 (1971-02-01), Bartkowiak
patent: 3749415 (1973-07-01), Sampatacos
patent: 4722540 (1988-02-01), Kozyra et al.
patent: 6557872 (2003-05-01), Garrard
Birch & Stewart Kolasch & Birch, LLP
Spisich George D
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