Double cross arm independent front suspension of equation type racing car and method for controlling linear rigidity thereof
A formula car, independent suspension technology, applied in the direction of suspension, racing car, elastic suspension, etc., can solve poor stability, the impact of formula car comfort and safety, difficult suspension line stiffness and roll stiffness relatively independent adjustment To improve line stiffness, reduce self-weight, and improve handling stability
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Embodiment 1
[0038] Embodiment 1: The double-wishbone independent front suspension of formula racing car, constitutes as Figure 1-4As shown, it includes an independent suspension assembly symmetrically arranged on both sides of the front of the vehicle frame 25. The independent suspension assembly includes a connecting block 4 connected to the front suspension push rod 20, and an independent spring is connected to the connecting block 4. 12. The other end of the independent spring 12 is connected to the front arm bar 30 of the vehicle frame 25. The connecting blocks 4 on both sides are respectively hinged with a short shaft 11, and three spring connecting rods 5 are hinged between the two short shafts 11. The three spring connecting rods 5 are provided with a weight-reducing through hole 13, which can reduce the weight of the three spring connecting rods 5. Its own weight plays a certain auxiliary role in the requirements of the body weight. The middle part of the three spring connecting...
Embodiment 2
[0054] Embodiment 2: Simulation Analysis of Wheel Jump
[0055] The simulation parameters of the double-wishbone independent suspension are set as wheelbase 1550mm, sprung mass 1212kg, center of mass height 300mm, tire static diameter 228.6mm, tire stiffness 140N / mm, tire mass 3.5kg, and effective travel of the wheel jump 50mm. The length of the spring shock absorber is 200mm, and the length of the third spring is 270mm. The simulation results of wheel jump in the same direction are as follows: Figure 5 shown.
[0056] exist Figure 5 The middle is the comparison of the displacement changes of the independent spring and the third spring of the double-wishbone independent front suspension. The change amount of the independent spring and the third spring is almost equal when the wheel jumps in the same direction, that is, the transmission ratio of the third spring can be almost equal to that of the independent spring by rationally designing the mechanical structure. It shows...
Embodiment 3
[0058] Embodiment 3: Simulation analysis of step steering
[0059] Perform step steering simulations for different stiffnesses of the third spring (125lbs / in and 250lbs / in), and the simulation result curves are as follows Figure 8 shown.
[0060] Figure 8 It shows that the change curves of the body roll angle after the step steering under different stiffnesses of the third spring are basically coincident, which means that the third spring has almost no influence on the vehicle roll.
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