Optimization method of automobile support rod

Car support rods are used in many positions of vehicles, such as hood support rods, rear trunk support rods, and so on. The support rod is an elastic element with gas and liquid as the working medium. It is composed of a pressure tube, a piston, a piston rod, and several connecting parts. The pressure is equal, but the cross-sectional area on both sides of the piston is different. One end is connected to the piston rod and the other end is not. Under the action of gas pressure, pressure is generated to the side with the smaller cross-sectional area, that is, the elastic force of the support rod. Set different nitrogen pressures or piston rods of different diameters. Unlike mechanical springs, the support rod has a nearly linear elastic curve.

Application of optimization method for supporting rod layout

3.1 Calculation of supporting force

　　Before the formal calculation, the operation model of the support rod layout should be simplified. Because there is a small angle between the actual position of the support rod and the XZ horizontal plane, geometric analysis can be taken for its horizontal arrangement.

　　 By converting the force value calculated from the actual position of the support rod through the XZ horizontal plane simplification, the calculated force value is converted on the basis of the coordinate angle, which can simplify the calculation process and help improve the accuracy of the calculation result. Relative coordinates are applied in the XZ horizontal plane.

3.2 Apply Excel calculation model to optimize the layout

　　 The relevant parameters for the optimal arrangement of the car back door support rod should be input as the design. It should be emphasized that if the input data fails to meet the layout requirements, it should be re-entered, and a new logic judgment should be added to tell the designer whether the input value meets the requirements.

　　 In the initial calculation, the relevant parameters should accurately input according to the previous layout experience, and then the relationship between MF and MG, and the calculation results of F on and F off should be obtained. When the back door is opened, the balance point remains at 8°, and the speed of the opening process is relatively fast. At the same time, the F opening is only 26N, and the F closing reaches 75N. This is unable to meet the requirements of opening and closing the car back door. Because this force value plays an important role in measuring the arrangement, it is directly related to the user's intuitive experience, so every time the support rod is arranged and optimized, these two forces should be taken as the leading factor; in addition, full attention should be paid to the change of torque, In this case, the force value of the support rod should be controlled as small as possible, which can be beneficial to the performance of the body and the back door without increasing the cost. After continuous adjustment and optimization, after improving the plane coordinates of the fulcrums at both ends of the support rod, F opening, F closing, and MF have been greatly improved. If the back door is opened to about 15°, MF and MG will be in the balance range, which meets the design and layout requirements. But when the value of F open is 48N and the value of F close is 44N, this set of data is extremely scientific and reasonable for user operations, and there will be no excessive or small force. At the same time, when the opening angle passes through the balance range, the value of MF is larger than that of MG, and the changes of the two tend to be the same. This can effectively prevent the opening speed from being too fast. At the same time, it should effectively cooperate with the damping generation. The opening and closing process of the back door can be controlled within the design range.

  4 Conclusion

　　 All in all, the optimal method of car back door support rod layout should be fully mastered. In the actual layout, it should be possible to create an accurate, objective, and reasonable calculation model. Because the back door of the car has certain friction and the support rod has damping, it greatly increases the difficulty of calculation and analysis. In addition, the speed calculation of the back door during the opening process can only give a theoretical reference value. This article mainly studies the optimization method of the support rod arrangement of the automobile back door. By applying the Excel calculation model, the calculation procedure is effectively simplified, so that the parameters are as uniform as possible to reach the standard, and the accuracy of the relevant force value of the support rod is determined by the change of the plane position coordinate. Reliability is fully analyzed and optimized. Scientifically and effectively solve some difficult problems in the arrangement of car back door support rods. This method not only improves the optimization method but also improves the design efficiency, which has important practical reference value.

Elecdeer is a professional auto parts purchasing platform. Elecdeer offers automobile and motorcycle products at amazing ex-factory prices. This is the best shop for auto and motorcycle parts. We provide the best quality products and the best service. Welcome to contact us.