FIELD OF INVENTION
The present invention related to frame of two wheeled vehicles. The invention is
more particularly related to light weight and high strength frame for bicycle.
BACKGROUND & PRIOR ART
Bicycle are the evolved over decades into many types as per speed and strength in
load carrying capacity using various composite materials and different structure of
frames and many other mean, mostly bicycle sold in market is based on most
bicycle sold these days are classified on the basis of looks strength and speed
Bikes with looks generally weaken in strength as for visual ability purpose a
designer have to low down its strength and if they produce as per.strength, they
increase its weight which result in lower the working speed of the bike, these are
generally bikes which we named as 'Ranger cycle'.
Bikes with strength does not have looks as per the desired choice of our new
generation these bikes are old one use in early 8(Ts and 90's.
Now as new light weight cycles are known for speed but to attain that speed and
strength they use composite material which overall increase cost and these bikes
are out of reach of some families.
OBJECTIVE OF THE INVENTION
The principal objective of this invention is to present a bicycle frame with reduce
weight and high bending strength. Another objective of this invention is design a
a bicycle frame with low cost and good appearance compare to the prior art.
Further objective of the invention is to design a low weight bicycle frame with
using traditional material like malleable iron.
SUMMARY
The present invention present a bicycle frame which is comprised of a hollow
structure with structure similar to capital I ("I"). The hollow structure of the
bicycle frame is designed in a particular structure to gain maximum strength. The
traditional composition material like malleable iron is used in designing the
bicycle frame. The bicycle frame is connected to and extends between the hollow
steering and the seat support column.
BRIEF DESCRIPTION OF DRAWINGS
Figure i shows right side view of the bicycle frame with wheels assembly.
Figure 2 shows section view of tubes used in the bicycle frame.
Figure 3 is isometric back-top view of the bicycle comprising bicycle frame.
Figure 4 shows isometric back-down view of the bicycle frame.
Figure 5 shows isometric front-down view of the bicycle.
Figure 6 shows isometric front-top view of the bicycle assembly.
Figure 7 shows exemplary calculation of load across different part of frame.
Figure 8 shows section load calculation
Figure 9 Shows the software result data under the load.
DETAIL DESCRIPTION
In Figure I, the tube (1 ) ends are welded to tube (2 ) and tube ( 3) at points
(102, 103) then from point 203 one end of the tube (5 ) is welded at angle of 950
on clock wise direction from tube (2) and other end is welded to the circular tube
part at point (605.1) at, from point (605) which is on part (18) and has a (90) CW
angle from tube (5) a tube,(6) is welded up to point (406), from point (406) the
tube (4) is welded at (130) from Counter Clock Wise (CCW) direction to tube (5)
till point (403). From point (103) a tube (3) is welded at (115) angle CCW
direction from tube (I) and meet the point (403) through tube (3).
In figure I from part (18) a tube (14) is welded to part (19) from their part (7.1) is
welded perpendicular to part (19) from its end till point (600) and a tube (81) is
welded from point (406) to part (90) and from part (90) a tube (8.1) is welded to
point (600) and meet tube( 7.1) similarly done a tube from other side of part (19)
and (90).
Plastic parts (3.1), (1.1) is added between tubes (4),( 3) and (3).(1). And chamfers
are (5.1), (1.2.1): (1.2), (2.1.1), (2.1),'(2.2.1), (5.1), (5.1.2),'(1.1.1), (3.2), (3.1.1).
(4.1), (6.1), (6.2), (6.2.1), (4.1.2), (15), (15.1), '(16), (16.1), (17.1)., (17), (20),
(15.1.1), (15.1.2), (15.1.3), (13) added towards all the welds joint in the frame.
In figure 1 a moving part is.added toward front wheel i.e. part (10) which is free to
move along top axis to part (12) through bearing from the adjacent edges tube (9)
is welded toward point (601) and which is to be connected to the handle while
passing through tube (2).
Figure 2 is section view of tube to be added in (I), (6) and (5) from figure 1. As
shown in figure 2 a metal ("I") strip is added between the tube which increase the
bending strength of the tube with very less thickness of the tube of about "0.5 to
I" mm, these tube is added to part (1), (6) and (5) only as the maximum chance
of failure of the frame is on these parts. With the help of this additional "I" section
part the load carrying capacity of the frame increased.
The part (503), (502), (503) is the desired shape of "I" section where (501) is the
normal tube of 0.5 to I mm thick From Figure 2.
Figure 3 showing chamfer parts i.e. (29), (28), (25). (24), (23), and (27).
In Figure 4. Part (35). (37) are bolts and part (37) are the shafts connecting wheels
to frame and moving part (10) from Figure 1.
In Figure 5. (38) is the rubber wheel on rib part (39).
Figure 6. Contain wheels description where (39) is the 'W* shaped rod bended in
the shape of circular rim. Three parts of part (32) is the straight rectangular hollow
part welded at (120 angle) with each other from centre( 601), (600) where (32) is
the bended part welded between two straight part (33) at points (602), (603), (604)
Manual solution
AB=Length indicated in figure 7.
a=Angle indicated in figure 7
3000= load applied
y=distance of 1 section from neutral axis
W, q=distance as shown in figure 8
Max body.moment at B = 3000*AB N-m
Max body moment at C = 3000*Cos (a)*Cos (b)
For section
Maximum body stress in AB in Figure 8 is calculated as
Stress max (AB) = 3000*ABV(l/12)*(W*DA3-q*dA3)' '
Maximum, body stress at CD in fig
Stress max (CD) = (3000 Cos (a) )*Cos (b)) *y/(i/12)*(W*DA3-q*dA3)
Sign:
Applicant No. I : AMIT YADAV;
ADDRESS: 7A , Nyay Vihar Colony
Maharishi Nagar Sitapur Road
Lucknow, India PIN- 226020
signv4M
Applicant No. 2 : A JAY PRATABH
PANDEY
ADDRESS: Viil. - Kamupur Durga ,
Post - Malhipur, Thana- Mankapur,
Dist. -Gonda(UP), India Pin-271302
CLAIMS
We claim:
1. A bicycle frame (1000) comprising:
a plurality of hollow tubes (2000) which is formed to receive and
support a bicycle mechanism ( 3000) of a front wheel., a rear wheel, a
seating mechanism and a pedal mechanism; said plurality of hollow
tubes (2000) formed by an internal hollow structure (8000) of a
shape similar to English word "I" to get a structural strength .
2. The bicycle frame (1000) as claimed in claim 1, said internal hollow
structure (8000) is present internally in at least one of said plurality of
hollow tubes (2000).
3. The bicycle frame (1000) as claimed in claim I, said shape similar to
English word "1" is a structure in which having two hand, each hand
having a strengthen curve.
4. The bicycle frame (1000) as claimed in claim I, the plurality of
. hollow tubes are shape of using at least one shape of but not limiting
to as circular, square, rectangular, diamond, triangular, or oval.
5. The bicycle frame (1000) as claimed in claim 1, the plurality of
hollow tubes are prerared by using at least one material but not
limiting to steel, aluminium, aluminium alloys, titanium, carbon fibre,
thermo plastic magnesium, scandium, beryllium, bamboo wood,
combination of such materials or alloys or combination of alloys.
6. The bicycle frame (1000) as claimed in claim I, wherein said bicycle
mechanism is any bicycle system present in prior art.