Introduction of the car support rod
With the improvement of people's living standards, higher requirements are put forward on the performance and quality of vehicles. The improvement in the arrangement of the support rods of the back door of the car is conducive to optimizing the structure of the vehicle, enhancing the humanization of the vehicle, and providing users with greater convenience and safety.
The arrangement of the back door support rod is a key point in the design of the car back door. Whether it can be scientifically arranged is related to whether the back door can be opened and closed normally, and has a direct impact on the user experience. The back door of a car is supported by a support rod, and its own weight acts together with the hinge rotation as the center opens and closes. However, in practice, the optimization of the arrangement of support rods needs to be further improved
1 The basic situation of the support rod
The so-called support rod is an elastic device with gas, liquid, etc. as the operating medium, which is mainly composed of components such as piston rod, cylinder, and piston. The piston is equipped with vent holes, and the air pressure on both sides is basically the same. The supporting force generated by the piston is due to the difference in the force surface on both sides. The elastic force can be determined on the basis of the air pressure setting. From a theoretical point of view, applying formulas for correlation calculations does not show a linear change. However, due to the combined effects of damping and friction during the operation of the air passage, the air pressure on both sides of the piston has the same hysteresis, so the force of the gas spring is close. linear change.
The size of the supporting force changes with the running distance of the supporting rod and is determined by the relationship between its supporting force and the running distance
Among them, F is the supporting force during operation; Fmax is the maximum supporting force; Fmin is the minimum supporting force; L is the total running distance; △L is the instantaneous running distance.
2 Basic principles of support rod arrangement
The scientific arrangement of the car back door support rod needs to follow these basic principles:
(1) Due to the limitation of the shape of the car itself, there will be an angle between the support rod and the hinge, and the angle must not be between the ball joint and the connected device during the arrangement. Interference occurs during relative operation, otherwise, it is prone to wear;
(2) When the car back door is closed, if the extension line above the axis of the support rod is located on the front side of the hinge, its arrangement should be fixed at the upper end; if the extension line is on the rear side of the hinge, it should be Carry out the bottom fixed arrangement.
(3) When the back door of the car is closed, the combined force formed by the supporting force and the gravity of the door should produce the effect of closing the door to ensure safety;
(4) If the back door of the car is in the lifted state, the supporting force should ensure that the door is raised to the highest point, and Steady speed increases.
(5) During the closing process of the back door, the supporting force and the gravity of the back door should maintain a balance point to ensure safety. The balance point should be controlled at the waist of the human body.
(6) Try to control the opening and closing force within 40 to 80 Newtons.
(7) In order to ensure safety, the door should not be raised too fast to avoid accidents; when the door is opened to the maximum angle, the speed needs to be slowed down to make it stable and avoid jitter.
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