南榮技術學院 101 學年度第二學期教師教學媒體觀摩及數位教材製作2015/9/11 工程科技研究所 副教授 蔡錦山 1 報告人：工程科技研究所 副教授 蔡錦山 A Study on the Linkage Mechanisms

Outline 2 Introduction § Motivation § Example § Application § 2015/9/11 工程科技研究所 副教授 蔡錦山 Conclusions §

Introduction /9/11 工程科技研究所 副教授 蔡錦山 Data source : A mechanical linkage is an assembly of bodies connected to manage forces and movement. The movement of a body, or link, is studied using geometry so the link is considered to be rigid. The connections between links are modeled as providing ideal movement, pure rotation or sliding for example, and are called joints.

Linkage Mechanism /9/11 工程科技研究所 副教授 蔡錦山 Data source : hanical) hanical) A linkage mechanism coupling a supporting structure and a moveable member for insuring relative linear motion of the moveable member. A controlled arm and a radial lever are so coupled along a center line to the supporting structure and each other that a controlled arm end is restricted to substantially linear motion only for a predetermined segment of its path.

Variable stroke engine /9/11 工程科技研究所 副教授 蔡錦山 Picture source : Autocar Handbook, Ninth edition

6 Motivation (1/2) Crank-Rocker Mechanism: 2015/9/11 工程科技研究所 副教授 蔡錦山

7 Motivation (2/2) 2015/9/11 工程科技研究所 副教授 蔡錦山 Crank-Rocker Mechanism: Press the picture to animate the motion of the Crank-Rocker Mechanism.

Example: A Belt-Driven Camshaft /9/11 工程科技研究所 副教授 蔡錦山 Press the picture to show that how to complete the Belt-Driven Camshaft.

9 Application (1/4) A Double Chebyshev's Linkage Mechanism: 2015/9/11 工程科技研究所 副教授 蔡錦山

10 Application (2/4) 2015/9/11 工程科技研究所 副教授 蔡錦山 A Double Chebyshev's Linkage Mechanism:

11 Application (3/4) A Double Chebyshev's Linkage Mechanism: 2015/9/11 工程科技研究所 副教授 蔡錦山 Press the picture to animate the motion of the Double Chebyshev's Linkage Mechanism.

12 Application (4/4) 2015/9/11 工程科技研究所 副教授 蔡錦山 A Double Chebyshev's Linkage Mechanism: Press the picture to see the motion of the Double Chebyshev's Linkage Mechanism.

13 Conclusions CAD (Computer Aided Design) compared with Kinematics of Machines for the linkage mechanism design 2015/9/11 工程科技研究所 副教授 蔡錦山 Simpler More Convenient More Flexible More Economic More Efficient More

2015/9/11 工程科技研究所 副教授 蔡錦山 14 敬請指導謝謝聆聽

A Belt-Driven Camshaft 2015/9/1115

Introduction 2015/9/1116 Creating cams using curved slots Using gears to simulate a belt drive mechanism Using rulers to draw precise shapes

Setting Up the Workspace (1/3) 2015/9/1117

Preferences dialog 2015/9/1118

Setting Up the Workspace (2/3) 2015/9/1119

Numbers and Units dialog (1/2) 2015/9/1120

Numbers and Units dialog (2/2) 2015/9/1121

Setting Up the Workspace (3/3) 2015/9/1122

Workspace dialog 2015/9/1123

Empty workspace 2015/9/1124 The y-axis The x-axis Grid lines Rulers

Grid Snap should be activated 2015/9/1125

View Size dialog (1/2) 2015/9/1126

View Size dialog (2/2) 2015/9/1127 automatically computes the other

Drawing the Disk directly 2015/9/1128

Attaching the Disk to the Background 2015/9/1129 These fields show the coordinates of the other point of the pin joint.

Drawing the Curved Slot 2015/9/1130

Changing the Shape of the Curved Slot (1/10) 2015/9/1131

Changing the Shape of the Curved Slot (2/10) 2015/9/1132

Changing the Shape of the Curved Slot (3/10) 2015/9/1133

Changing the Shape of the Curved Slot (4/10) 2015/9/1134

Changing the Shape of the Curved Slot (5/10) 2015/9/1135

Changing the Shape of the Curved Slot (6/10) 2015/9/1136

Changing the Shape of the Curved Slot (7/10) 2015/9/1137

Changing the Shape of the Curved Slot (8/10) 2015/9/1138

Changing the Shape of the Curved Slot (9/10) 2015/9/1139

Changing the Shape of the Curved Slot (10/10) 2015/9/1140

Numerically reshaped cam 2015/9/1141

Creating Cam Followers (1/2) 2015/9/1142

Creating Cam Followers (2/2) 2015/9/1143

Choose the Horizontal Keyed Slot tool and click one of the cam followers 2015/9/1144

Choose the Horizontal Keyed Slot tool and click the other of the cam followers 2015/9/1145

Two cam followers with keyed slot joints 2015/9/1146

The snap point 2015/9/1147

Snap point near the right end of the left cam follower 2015/9/1148

Snap point near the left end of the right cam follower 2015/9/1149

Duplicating a curved slot (1/2) 2015/9/1150

Duplicating a curved slot (2/2) 2015/9/1151

Select the original curved slot and choose Appearance from the Window menu 2015/9/1152

Enter “Left Follower Slot” in the name field of the Appearance window 2015/9/1153 Left Follower Slot

Select the duplicated curved slot and enter “Right Follower Slot” in the name field of the Appearance window 2015/9/1154 Right Follower Slot

Verify the FOR coordinates for the Left Follower Slot (1/2) 2015/9/1155

Verify the FOR coordinates for the Left Follower Slot (2/2) 2015/9/1156

Verify the FOR coordinates for the Right Follower Slot (1/2) 2015/9/1157

Verify the FOR coordinates for the Right Follower Slot (2/2) 2015/9/1158

Attaching the Cam Followers to the Slots (1/4) 2015/9/1159 Shift + the point

Attaching the Cam Followers to the Slots (2/4) 2015/9/1160

Attaching the Cam Followers to the Slots (3/4) 2015/9/1161 Shift + the point

Attaching the Cam Followers to the Slots (4/4) 2015/9/1162

Dragging the cam disk 2015/9/1163

To restore the initial conditions 2015/9/1164

Creating the Drive Disk 2015/9/1165

Click the center snap point of the drive disk to attach the motor 2015/9/1166

Properties window for a motor 2015/9/1167

Selecting the gear constraint 2015/9/1168

Properties window for gears 2015/9/1169

Choose Accuracy from the World menu 2015/9/1170

Simulation Accuracy dialog 2015/9/1171

Choose Time from the Measure menu 2015/9/1172 Press the picture to animate the motion of the Belt-Driven Camshaft.

HW#5-A Belt-Driven Camshaft (1/2) 2015/9/1173 Cam Follower Driving Disk

HW#5-A Belt-Driven Camshaft (2/2) 2015/9/1174