Course Objectives
1. Able to calculate the degrees of freedom, instantaneous center, and velocity of a mechanism.
2. To understand the function of friction transmission and to be able to calculate the speed ratio of a friction wheel. Also, as an application, be able to explain the mechanism of a continuously variable transmission.
3. Able to explain types of gears, names of each part, tooth profile curves, how to express tooth size, and to be able to calculate sliding ratio and meshing ratio.
4. Able to calculate the speed transmission ratio of a gear train and also be able to explain about plofile shifted gear.
5. Able to know the types of cam and linkage devices and analyze their motions.
Rubric
| Ideal Level | Standard Level | Minimum Level |
| Achievement 1 | Able to calculate velocity by appropriate use of degrees of freedom and instantaneous center, and by drawing methods appropriate to the task. | Able to find the degrees of freedom and instantaneous center and explain their meaning. Also, be able to calculate velocities according to the solution of the example. | Able to find the degrees of freedom and draw to find the instantaneous center. |
| Achievement 2 | Able to calculate the speed ratio of a friction wheel and correctly explain the mechanism and features of various friction transmission devices, citing their advantages and disadvantages. | Able to calculate the speed ratio of a friction wheel and explain the names and characteristics of various friction transmission devices. | Able to explain name and the basic features of various friction transmission devices. |
| Achievement 3 | Able to explain the principle of gears and the physical meaning of sliding ratio and contact ratio, and to be able to calculate each value. | Able to explain terms related to gears and calculate sliding ratio and contact ratio. | Explain terms related to gears. |
| Achievement 4 | A gear train with a speed transmission ratio that meets the design requirements can be designed, taking even feasibility into consideration. | The speed transmission ratio of the gear train can be calculated and the gear train can be designed to meet the design requirements. | Able to calculate the speed transfer ratio of the gear train. |
| Achievement 5 | Understand the principles of cam and linkage devices and be able to design mechanisms that meet design requirements. | Understand the principles of cam devices and linkage devices, and be able to analyze the motion of existing mechanisms. | Able to explain the names and features of cam and linkage devices. |
Assigned Department Objectives
Teaching Method
Outline:
The goal of this course is to understand the "tricks" to easily elucidate the mechanisms of machine structures, to be able to elucidate the movements of various machines, and to be able to design the desired structures easily.
The contents of this course are also used in the design of machine elements, so students are expected to make efforts to understand the basics through their own study.
Style:
The course will focus on theoretical explanations and exercises through lectures, but will also include group work exercises to give participants an opportunity to understand their roles when working as a team.
Students are encouraged to move and learn on their own.
[30 hours of class time]
Notice:
It is easy to learn if you have a good understanding of mechanical motion, which is covered in Mechanical Design and Drafting. Students are expected to bring their own drawing tools such as rulers and compasses, as there will be a lot of drawing during the lecture.
The portfolio evaluation will include the evaluation of [Report Assignment] and [Online Review Test].
Characteristics of Class / Division in Learning
Course Plan
|
|
|
Theme |
Goals |
| 1st Semester |
| 1st Quarter |
| 1st |
Velocity and instantaneous center and how to calculate the velocity in the mechanism I |
Able to explain the definitions of machine, mechanism and element.
|
| 2nd |
Velocity and instantaneous center and how to calculate the velocity in the mechanism II |
Able to calculate the degree of freedom of the mechanism.
|
| 3rd |
Velocity and instantaneous center and how to calculate the velocity in the mechanism III |
Able to find the instantaneous center and instantaneous center trajectory of the mechanism.
|
| 4th |
Velocity and instantaneous center and how to calculate the velocity in the mechanism IV |
Able to calculate the velocity of the mechanism using by the instantaneous center.
|
| 5th |
Friction Transmission devices I |
Able to calculate the rotation speed of the friction wheel based on the rotation ratio.
|
| 6th |
Friction Transmission devices II |
Understand various mechanisms using friction and be able to explain how each works.
|
| 7th |
Friction Transmission devices III |
Able to explain the mechanism of a continuously variable transmission.
|
| 8th |
Midterm examination |
|
| 2nd Quarter |
| 9th |
Gear Tooth Profile and Gears I |
Able to explain the characteristics of various types of gears and calculate the speed transfer ratio of a gear train.
|
| 10th |
Gear Tooth Profile and Gears II |
Understand the theory of involute gears and be able to calculate tooth thickness.
|
| 11th |
Gear Tooth Profile and Gears III |
Able to explain and calculate sliding ratio and contact ratio.
Able to explain the profile shifted gear.
|
| 12th |
Cum I |
Able to explain the characteristics of various cam devices.
|
| 13th |
Cum II |
Understand cam diagrams and basic design of plate cams.
|
| 14th |
Linkage I |
Understand the principle of a 4-node linkage mechanism and be able to calculate the rotational conditions.
|
| 15th |
Linkage 2 |
Able to explain the mechanism and features of slider crank mechanism and linear motion mechanism.
|
| 16th |
Final examination |
|
Evaluation Method and Weight (%)
| midterm / final exam | quiz | portfolio | presentation / attitude | other | Total |
| Subtotal | 60 | 0 | 40 | 0 | 0 | 100 |
| Basic Proficiency | 10 | 0 | 0 | 0 | 0 | 10 |
| Specialized Proficiency | 50 | 0 | 40 | 0 | 0 | 90 |
| Cross Area Proficiency | 0 | 0 | 0 | 0 | 0 | 0 |