4.3.4 Creating Rear Suspension Model

1. Creating Design Points

Select the Point tool and click the locations shown in Table 4.10 to place design points. Use the default settings for point, which are Add to Ground and Don’t Attach.

Table 4.10 Points Coordinate Locations

Points	X Location	Y Location	Z Location
Left_RCA_pivot	689.37	375.0	363.22
Left_RCA_outer	1265.0	375.0	695.56
RL_Wheel_center	1265.0	375.0	825.0
Right_RCA_pivot	689.37	375.0	-363.22
Right_RCA_outer	1265.0	375.0	-695.56
RR_Wheel_center	1265.0	375.0	-825.0

2. Creating Rear Suspension

Select the Cylinder tool . Select New Part. In the Radius text box, enter 25. Click Left_RCA_pivot and Left_RCA_outer to create a Cylinder between the two points. Rename the cylinder part, to Left_RCA.

Select the Cylinder tool . Select Add to Part. In the Radius text box, enter 25. Click Left_RCA, then RL_Wheel_center and Left_RCA_outer, to create Left_RCA.

Select the Cylinder tool . Select New Part. In the Radius text box, enter 25. Click Right_RCA_pivot and Right_RCA_outer to create a Cylinder between the two points. Rename the cylinder part, to Right_RCA.

Select the Cylinder tool . Select Add to Part. In the Radius text box, enter 25. Click Right _RCA, then RR_Wheel_center and Right _RCA_outer, to create Right _RCA.

Figure 4.17 The model of the rear suspension

3. Creating the Constraint Joint

Setting up Working Grid orientation: Global XY direction. Click Top View Select the Revolute Joint tool . Select the constraint method 2 Bod-1 Loc and Normal To Grid, Select the Left_RCA and the Chassis, and Click the point: Left_RCA_pivot, to create the revolute joint. Modify the position of the Revolute Joint: rotation to 30⁰.

Figure 4.18 Creating the Revolute Joint

Setting up Working Grid orientation: Global XY direction. Click Top View Select the Revolute Joint tool . Select the constraint method 2 Bod-1 Loc and Normal To Grid, Select the Right_RCA and the Chassis, and Click the point: Right_RCA_pivot, to create the revolute joint. Modify the position of the Revolute Joint: rotation to 30⁰.

4. Creating the Spring

Select the Point tool . Select Add to Part and Don’t Attach. Creating Design Points: RL_Spring_lower (1070.42, 375.0, 583.22) on the Left_RCA.

Select the Point tool . Select Add to Part and Don’t Attach. Creating Design Points: RL _Spring_upper (1070.42, 641.0, 583.22) on the Chassis.

Select the Spring tool . In the K, C text box, enter 160.2, 6000. Click RL_Spring_ lower and RL_Spring_upper, to create the left spring of the rear suspension.

Select the Point tool . Select Add to Part and Don’t Attach. Creating Design Points: RR_Spring_lower (1070.42, 375.0, -583.22) on the Right_RCA.

Select the Point tool . Select Add to Part and Don’t Attach. Creating Design Points: RR_Spring_upper (1070.42, 641.0, -583.22) on the Chassis.

Select the Spring tool . In the K, C text box, enter 160.2, 6000. Click RR_Spring_ lower and RR_Spring_upper, to create the right spring of the rear suspension.

Figure 4.19 The model of the rear suspension spring