2024年6月11日发(作者：贺秀慧)

附 录A

The automotive vehicle suspension system frame (or Unibody) and axle (or

wheel) power transmission connection between all devices in general. Its function

is to act on the road wheels on the vertical force (support force), the vertical

reaction force (traction and braking) and lateral reaction force and the torque

reaction force caused by the transfer to the frame (or Unibody) on, in order to

ensure the normal running car. Therefore, the suspension system performance and

quality performance for the vehicle plays an important role. This paper suspension

systems for passenger cars and trucks in the widely used leaf spring design

calculation method for the in-depth analysis and research.

The article on the current variety of automotive leaf spring design calculation

method of intensive analysis and research, summed up the characteristics of

various calculation methods, limitations and application. Automotive leaf spring

from the elastic component in addition to the role, but also and play the guiding

role, and multi-chip friction between the spring damping system also played. As

the leaf spring structure is simple, use and maintenance, and easy maintenance,

long leaf springs are widely used in the car. Usually the new car design, according

to the layout of a given space vehicle, axle load full load minus the estimated

quality of non-sprung mass, obtained in each pair of spring bearing on the quality.

Generally before the rear axle, wheels, brake drums and steering knuckle,

transmission shaft, steering assembly, such as non-vertical rod sprung mass. If the

layout of the axle above the leaf spring, spring 3 / 4 the quality of the non-sprung

mass, the next set spring, 1 / 4 non-sprung mass spring mass models based on

different requirements, general arrangement is given by the straight length of

spring control size.

In the arrangement possible, try to increase the length of the spring, mainly to

consider the following reasons. As the spring stiffness and is inversely proportional

to the cube of the length of the spring, so from the perspective of improving

vehicle ride comfort, hope springs length longer good. In the spring stiffness of

the same case, the long wheel up and down in the spring, the spring from the two

ears changes the volume is relatively small, the front suspension, the caster angle

change is small, in favor of auto driving stability. Increase the length of the spring

can reduce stress and stress amplitude spring working to improve spring life. Can

be used to increase the length of the spring reed thick spring, thereby reducing

the number of springs and spring reed thick volume ear piece to improve the

strength of the main vehicle sprung mass vibration system with quality

components to evaluate the natural frequency of vehicle ride comfort important

parameters. Suspension design based on vehicle ride comfort requirements,

should be given an empty car, fully loaded, front and rear suspension frequency

range. If you know the frequency, you can find the suspension static deflection.

Select the suspension static deflection, the hope after the suspension static

deflection is less than the front suspension static deflection, and the best value

close to two vehicles in order to prevent uneven roads often hit the buffer block,

suspension design must be given adequate deflection value. Suspension dynamic

deflection and car usage and the value of the static deflection due to ride height,

suspension travel and dynamic properties of steel spring guide are all fully loaded

car with a high arc, and therefore the arc spring loaded high-value should be

2024年6月11日发(作者：贺秀慧)

附 录A

The automotive vehicle suspension system frame (or Unibody) and axle (or

wheel) power transmission connection between all devices in general. Its function

is to act on the road wheels on the vertical force (support force), the vertical

reaction force (traction and braking) and lateral reaction force and the torque

reaction force caused by the transfer to the frame (or Unibody) on, in order to

ensure the normal running car. Therefore, the suspension system performance and

quality performance for the vehicle plays an important role. This paper suspension

systems for passenger cars and trucks in the widely used leaf spring design

calculation method for the in-depth analysis and research.

The article on the current variety of automotive leaf spring design calculation

method of intensive analysis and research, summed up the characteristics of

various calculation methods, limitations and application. Automotive leaf spring

from the elastic component in addition to the role, but also and play the guiding

role, and multi-chip friction between the spring damping system also played. As

the leaf spring structure is simple, use and maintenance, and easy maintenance,

long leaf springs are widely used in the car. Usually the new car design, according

to the layout of a given space vehicle, axle load full load minus the estimated

quality of non-sprung mass, obtained in each pair of spring bearing on the quality.

Generally before the rear axle, wheels, brake drums and steering knuckle,

transmission shaft, steering assembly, such as non-vertical rod sprung mass. If the

layout of the axle above the leaf spring, spring 3 / 4 the quality of the non-sprung

mass, the next set spring, 1 / 4 non-sprung mass spring mass models based on

different requirements, general arrangement is given by the straight length of

spring control size.

In the arrangement possible, try to increase the length of the spring, mainly to

consider the following reasons. As the spring stiffness and is inversely proportional

to the cube of the length of the spring, so from the perspective of improving

vehicle ride comfort, hope springs length longer good. In the spring stiffness of

the same case, the long wheel up and down in the spring, the spring from the two

ears changes the volume is relatively small, the front suspension, the caster angle

change is small, in favor of auto driving stability. Increase the length of the spring

can reduce stress and stress amplitude spring working to improve spring life. Can

be used to increase the length of the spring reed thick spring, thereby reducing

the number of springs and spring reed thick volume ear piece to improve the

strength of the main vehicle sprung mass vibration system with quality

components to evaluate the natural frequency of vehicle ride comfort important

parameters. Suspension design based on vehicle ride comfort requirements,

should be given an empty car, fully loaded, front and rear suspension frequency

range. If you know the frequency, you can find the suspension static deflection.

Select the suspension static deflection, the hope after the suspension static

deflection is less than the front suspension static deflection, and the best value

close to two vehicles in order to prevent uneven roads often hit the buffer block,

suspension design must be given adequate deflection value. Suspension dynamic

deflection and car usage and the value of the static deflection due to ride height,

suspension travel and dynamic properties of steel spring guide are all fully loaded

car with a high arc, and therefore the arc spring loaded high-value should be