1. Creating Design Points
Select the Point tool and click the locations shown in Table 4.8 to place design points. Use the default settings for point, which are Add to Ground and Don’t Attach.
Table 4.8 Points Coordinate Locations
Points X Location Y Location Z Location
Left_LCA_outer -1339.243 270.315 697.432 Left_UCA_outer -1324.849 594.992 640.183 Left_UCA_inner -1295.861 666.706 316.702 Left_LCA_inner -1428.932 327.896 192.048 Left_Tie_rod_outer -1512.765 363.009 724.270 Left_Tie_rod_inner -1594.556 444.195 257.770 Left_Knuckle_inner -1334.488 377.557 678.522 Left_Wheel_center -1335.000 375.000 825.000 Right_LCA_outer -1339.243 270.315 -697.432 Right_UCA_outer -1324.849 594.992 -640.183 Right_UCA_inner -1295.861 666.706 -316.702 Right_LCA_inner -1428.932 327.896 -192.048 Right_Tie_rod_outer -1512.765 363.009 -724.270 Right_Tie_rod_inner -1594.556 444.195 -257.770 Right_Knuckle_inner -1334.488 377.557 -678.522 Right_Wheel_center -1335.000 375.000 -825.000
2. Creating Front Suspension
Select the Cylinder tool . Select New Part. In the Radius text box, enter 20. Click
Left_LCA_outer and Left_UCA_outer to create a Cylinder between the two points.
Rename the cylinder part, to Left_Kingpin.
Select the Cylinder tool . Select New Part. In the Radius text box, enter 20. Click
Left_UCA_outer and Left_UCA_inner to create a Cylinder between the two points.
Rename the cylinder part, to Left_UCA. Select the Sphere tool . Select Add to Part. In the Radius text box, enter 25. Click Left_UCA, then Left_UCA_outer, to create a Sphere.
Select the Cylinder tool . Select New Part. In the Radius text box, enter 20. Click
Rename the cylinder part, to Left_LCA. Select the Sphere tool . Select Add to Part. In the Radius text box, enter 25. Click Left_LCA, then Left_LCA_outer, to create a Sphere.
Select the Cylinder tool . Select New Part. In the Radius text box, enter 15. Click
Left_Knuckle_inner and Left_Tie_rod_outer to create a Cylinder between the two points.
Rename the cylinder part, to Left_Pull_arm.
Select the Cylinder tool . Select New Part. In the Radius text box, enter 15. Click
Left_Tie_rod_outer and Left_Tie_rod_inner to create a Cylinder between the two points.
Rename the cylinder part, to Left_Tie_rod. Select the Sphere tool . Select Add to Part. In the Radius text box, enter 20. Click Left_Tie_rod, then Left_Tie_rod_outer and
Left_Tie_rod_inner to create two Spheres.
Select the Cylinder tool . Select New Part. In the Radius text box, enter 20. Click
Left_Wheel_outer and Left_Knuckle_inner to create a Cylinder between the two points.
Rename the cylinder part, to Left_Knuckle.
Select the Cylinder tool . Select New Part. In the Radius text box, enter 20. Click
Right_LCA_outer and Right_UCA_outer to create a Cylinder between the two points.
Rename the cylinder part, to Right_Kingpin.
Select the Cylinder tool . Select New Part. In the Radius text box, enter 20. Click
Right_UCA_outer and Right_UCA_inner to create a Cylinder between the two points.
Rename the cylinder part, to Right_UCA. Select the Sphere tool . Select Add to Part. In the Radius text box, enter 25. Click Right_UCA, then Right_UCA_outer, to create a Sphere.
Select the Cylinder tool . Select New Part. In the Radius text box, enter 20. Click
Right_LCA_outer and Right_LCA_inner to create a Cylinder between the two points.
Rename the cylinder part, to Right_LCA. Select the Sphere tool . Select Add to Part. In the Radius text box, enter 25. Click Right_LCA, then Right_LCA_outer, to create a Sphere.
Select the Cylinder tool . Select New Part. In the Radius text box, enter 15. Click
Right_Knuckle_inner and Right_Tie_rod_outer to create a Cylinder between the two
points. Rename the cylinder part, to Right_Pull_arm.
Select the Cylinder tool . Select New Part. In the Radius text box, enter 15. Click
Right_Tie_rod_outer and Right_Tie_rod_inner to create a Cylinder between the two
points. Rename the cylinder part, to Right_Tie_rod. Select the Sphere tool . Select
Add to Part. In the Radius text box, enter 20. Click Right_Tie_rod, then Right_Tie_rod_outer and Right_Tie_rod_inner to create two Spheres.
Right_Wheel_outer and Right_Knuckle_inner to create a Cylinder between the two
points. Rename the cylinder part, to Right_Knuckle.
Figure 4.13 The body model of the chassis and the front suspension 3. Creating the Constraint Joint
Select the Spherical Joint tool . Select the constraint method 2 Bod-1 Loc, and
Normal To Grid. Select the Left_UCA and the Left_Kingpin, and then click the point: Left_UCA_outer, to create the constraint joint between the Left_UCA and the Left_Kingpin.
Select the Spherical Joint tool again. Place spherical joints at the following locations using the constraint method 2 Bod - 1 Loc, and Normal To Grid:
Between the Left_LCA and the Left_Kingpin at Left_LCA_outer. Between the Left_Tie_rod and the Left_Pull_arm at Left_Tie_rod_outer.
Select the Fixed Joint tool . Select the constraint method 2 Bod-1 Loc, and Normal
To Grid. Select the Left_Pull_arm and the Left_Kingpin, and then click the point: Left_Knuckle_inner, to create the constraint joint between the Left_Pull_arm and the Left_Kingpin.
Select the Fixed Joint tool again. Select the constraint method 2 Bod-1 Loc, and Normal
To Grid, to create the constraint joint between the Left_Knuckle and the Left_Kingpin at Left_Knuckle_inner.
On the File menu, select Settings. Click Working Grid. In the Set Location box, select
Pick, click design point: Left_UCA_outer. In the Set Orientation box, select Global YZ.
Click Right_View tool .
Select the Revolute Joint tool . Select the constraint method 2 Bod-1 Loc and
Normal To Grid, Select the Left_UCA and the Chassis, and Click the point: Left_UCA_ inner, to create the revolute joint.
On the File menu, select Edit. Click Modify. Click (Change Position). In the
Rotate text box, enter 5, then click . Close the dialog.
Normal To Grid, Select the Left_LCA and the Chassis, and Click the point: Left_LCA_ inner, to create the revolute joint. On the File menu, select Edit. Click Modify. Click
(Change Position). In the Rotate text box, enter 10, then click . Close the dialog. Repeat above steps, to create the revolute joint between the right bodies of the front suspension.
4. Creating the Spring
Select the Point tool . Select Add to Part and Don’t Attach. Creating Design Points:
Left_Spring_lower (-1314.390, 620.866, 523.473) on the Left_UCA.
Select the Point tool . Select Add to Part and Don’t Attach. Creating Design Points:
Left_Spring_upper (-1314.390, 910.866, 523.473) on the Chassis.
Select the Spring tool . In the K, C text box, enter 129.8, 6000. Click Left_Spring_
lower and Left_Spring_upper, to create the left spring of the front suspension.
Select the Point tool . Select Add to Part and Don’t Attach. Creating Design Points:
Right_Spring_lower (-1314.390, 620.866, -523.473) on the Right_UCA.
Select the Point tool . Select Add to Part and Don’t Attach. Creating Design Points:
Right_Spring_upper (-1314.390, 910.866, -523.473) on the Chassis.
Select the Spring tool . In the K, C text box, enter 129.8, 6000. Click Right_Spring_
lower and Right_Spring_upper, to create the right spring of the front suspension.
Figure 4.14 The model of the chassis and the front suspension