清华大学：《机械原理》课程PPT教学课件（双语版）Chap10 Scheme of Mechanism system

Chap 10 Scheme of Mechanism system Chap 10.1 Review Design Process Chap 10.2 Design Process of Kinematic scheme of the mechanism system

Chap.10 Scheme of Mechanism system Chap.10.1 Review Design Process Chap.10.2 Design Process of Kinematic Scheme of the Mechanism System

Chap 10.1 Design Process Problem definition + Concept Generation Concept Selection Why? D What? Embodiment Design 9 Which? Detail design How? Fabrication Evaluation

Chap.10.1 Design Process Problem Definition Concept Generation Concept Selection Embodiment Design Detail Design Fabrication Evaluation Iteration Why? What? Which? How?

Chap 10.2 Design process of kinematic scheme of the mechanism system ■ Process a Example

Chap.10.2 Design process of kinematic scheme of the mechanism system ◼ Process ◼ Example

Design process working principle of the machine Motion forms analysis Redesign Type synthesis of the mechanisms Cooperation design Dimensional synthesis of mechanisms Evaluation Kinematic diagram of the mechanisms

Design process Redesign working principle of the machine Type synthesis of the mechanisms Dimensional synthesis of mechanisms Evaluation Motion forms analysis Cooperation design Kinematic diagram of the mechanisms

Working principle of the Machine Stepl a Gear cutting: form cutting and generating cutting Sheet transmission machine ND Creation conclusion

Working Principle of the Machine Step1 ◼ Gear cutting: form cutting and generating cutting ◼ Sheet transmission machine: Creation & conclusion

Motion forms analysis step2 a Analyze and decompose the motion which machine needs think out the motion forms Method imitation creation nnnn Creation conclusion

Motion forms analysis Step2 ◼ Analyze and decompose the motion which machine needs, think out the motion forms. ◼ Method: imitation, creation Creation & conclusion

Type synthesis of the mechanisms Step3 Choose, combine into or create the mechanisms a Principle satisfy the requirements, choose mechanisms as simple as it can be, limit the size, choose suitable kinematic pairs consider the drivers, good dynamic characteristics, be adjustable, be safe

Type synthesis of the mechanisms Step3 ◼ Choose, combine into or create the mechanisms ◼ Principle: satisfy the requirements, choose mechanisms as simple as it can be, limit the size, choose suitable kinematic pairs, consider the drivers, good dynamic characteristics, be adjustable, be safe

Cooperation design step4 Cooperation of the function, time and space. To ensure the cooperation of working links, the working cycle diagram is drawn It is a time table for the actions of all the working links 1. Principle 2. Method 3. Working cycle diagram

Cooperation design step4 Cooperation of the function, time and space. To ensure the cooperation of working links, the working cycle diagram is drawn. It is a time table for the actions of all the working links. 1.Principle 2.Method 3.Working cycle diagram

Principle 1. Operation Order(sequence of actions) 2. Step and cycle 3. Layout and no interference 4. Efficiency and less energy

Principle 1. Operation Order(sequence of actions) 2. Step and cycle 3. Layout and no interference 4. Efficiency and less energy

Method 1. Working cycle 2. Working time of the each mechanism 3. Motion cooperation

Method 1.Working cycle 2.Working time of the each mechanism 3.Motion cooperation