Land vehicles – Wheeled – Running gear
Reexamination Certificate
2000-07-07
2001-11-27
Pape, Joseph D. (Department: 3612)
Land vehicles
Wheeled
Running gear
C280S792000, C296S178000
Reexamination Certificate
active
06322105
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Filed of the Invention
The present invention relates to a bus frame, and more particularly to a bus frame having a center space frame to which front and rear frames are attached.
2. Description of the Prior Art
In general, a body and a frame of a bus are so long and bulky that it can be made of a plurality of parts, not a single large part. In other words, the body and the frame can be divided into three parts of front, center and rear frames which are separately manufactured and then welded together by an additional reinforcing material at all connecting portions.
As shown in
FIGS. 4 and 5
, a center frame
54
is installed between ⊂ or box-shaped front and rear frames
50
,
51
to make box-shaped spaces with a plurality of cross bars
52
and side bars
53
.
In addition, the front and rear frames
50
,
51
are made of side members
55
which are oppositely disposed each other in the lengthwise direction of a vehicle and a plurality of cross members
56
which connect those side members
55
in the horizontal direction of the vehicle.
The side members
55
are connected to two plates
57
horizontally set up to make central spaces, and thus, the center frame
54
and the two plates
57
form a center space frame.
Meanwhile, a plurality of reinforcing bars
59
are arranged to form spaces between the two plates
57
and to keep stiffness, and the front and rear frames
50
,
51
are respectively connected to the two plates
57
, to thereby forming the bus frame.
However, there have been problems in the conventional bus frame in that the front, center and rear frames are connected only by the two plates set up upright to allow a heavy engine to be accommodated on the rear frame, thereby imposing an excessive load onto the plates which connect the center and rear frames, and readily causing deformations by bending load (P) and changing the shape of the entire bus frame.
SUMMARY OF THE INVENTION
Therefore, it is an object of the present invention to solve the aforementioned problems and provide a bus frame having a center space frame to minimize bending deformation at the plates which are connected for center and rear frames, thereby relieving any change possible to be made in the entire shape of the bus frame.
In order to accomplish the aforementioned object, there is provided a bus frame having a center space frame which comprises a center frame formed by a plurality of cross bars, reinforcing bars, and side bars disposed to a space, a plurality of plates connected to the reinforcing bars and side bars, and a reinforcing frame part constructed at a portion where the reinforcing bars and the plates are interconnected to reinforce a structural stiffness.
The reinforcing frame part comprises a plurality of horizontal and vertical reinforcing beams to connect a plurality of reinforcing bars to each other, and the horizontal reinforcing beams are connected each other by an accessory vertical reinforcing beam.
REFERENCES:
patent: 2139807 (1938-12-01), Dayes
patent: 2189139 (1940-02-01), Fox
patent: 3019047 (1962-01-01), Ahrens
patent: 4353313 (1982-10-01), Panagin
patent: 5863070 (1999-01-01), Williams et al.
patent: 2714017 (1978-10-01), None
Chenevert Paul
Christie Parker & Hale LLP
Hyundai Motor Company
Pape Joseph D.
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