Candidate Projects E-CVT (sign IP Agreement) –Use the same idea for fix variable transmission (100...
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Transcript of Candidate Projects E-CVT (sign IP Agreement) –Use the same idea for fix variable transmission (100...
Candidate Projects
• E-CVT (sign IP Agreement)– Use the same idea for fix variable
transmission (100 : 1)
• Omni Wheels
• Telescoping Pole
Continuous Variable Transmission (CVT)
Jerry Tang - Elite
E-CVT Principle
• A is rotating while it is revolving alone circle B
• A rotation speed is R/r -1 or (R-r)/r
• How can we make A revolve along circle B? This is E-CVT
A
B
C
XX
R
r
Example No Slippage
A
B
C
D
A
B
C
D
B’
C’
D’
A’
B’
C’D’
A’
B’
C’
D’
A’B’
C’D’
A’
B’
C’
D’
A’
B’ C’
D’A’
B’
C’
D’
A’ B’
C’D’
A’
R = 2” Theta = Pi/4r = 1”Gear Ratio = R/r -1 = 2/1 -1 = 1:1
B’
C’
D’
A’
Gear Ratio
R r R/r-1 1/GR4 1 3 0.3333333 1 2 0.52 1 1 1
1.5 1 0.5 21.25 1 0.25 41.1 1 0.1 10
1.01 1 0.01 1001.001 1 0.001 1000
1.0001 1 1E-04 10000
E-CVT Prototypes
1) Vertical Piston 2) Horizontal Piston
5) Driven Gear4) Floating Gear 6) Sliding Cam
3) Fixed Cam
E-CVT Current Prototypes
1) Vertical Piston 2) Horizontal Piston
4) Driven Gear3) Floating Gear
E-CVT Output Shaft
1) U-Joint 2) Slotted X-Y Joint
6) Outer Gear Output4) Flexible Shaft
3) Pinned X-Y Joint
5) Inner Gear Output
X-Y Joint
The 2nd Generation of the E-CVT Prototype ProjectBased on the resource, time, availability, and course guidelines, work with students to define and achieve the project objectives according to the following:1. Understand CVT and E-CVT.2. Determine/Analyze the constraints of the E-CVT. For instance:
a. Is input and output reversible?b. O/I ratio range.c. Output torque range.d. How can the O/I ratio be a function of the input torque (auto shifting)?
3. Determine the efficiency of the E-CVT.4. Determine the E-CVT component dependencies in term of O/I ratio, O/I torque, etc.5. Model, simulate, design, and produce the prototype if applicable.This list can be grown and shrunk as necessary.
Backup
Vertical Pistons
Drawing of Floating Gear
Drawing of Driven Gears
Horizontal Piston
Example No SlippageR = 2” Theta = Pi/4r = 1”Gear Ratio = R/r -1 = 2/1 -1 = 1:1
A
B
C
D
A
B
C
D
B’
C’
D’
A’
B’
C’D’
A’
B’
C’
D’
A’B’
C’D’
A’
B’
C’
D’
A’
B’ C’
D’A’
B’
C’
D’
A’ B’
C’D’
A’
Gear Ratio
R r R/r-1 1/GR4 1 3 0.3333333 1 2 0.52 1 1 1
1.5 1 0.5 21.25 1 0.25 41.1 1 0.1 10
1.01 1 0.01 1001.001 1 0.001 1000
1.0001 1 1E-04 10000