CN109751354A - Air shock absorber, suspension system and vehicle using the same - Google Patents

Abstract

The invention discloses air-supported shock absorber and use the suspension system of the air-supported shock absorber, vehicle, belong to suspension device for vehicle technical field, air-supported shock absorber includes cylinder body, cylinder body has closed working chamber, slidable fit has the piston that working chamber is divided into rod chamber and rodless cavity in working chamber, piston is equipped with the damping hole of connection rod chamber and rodless cavity, without realizing the inflation/deflation of rod chamber and rodless cavity by the way that air bag and charge and discharge air pipe is additionally arranged to realize the function of vibration damping, and electromagnetic damping valve is set in damping hole, by the aperture for adjusting electromagnetic damping valve, to adjust the soft or hard degree of air-supported shock absorber, solve the problems, such as that air-supported shock absorber occupied space is big in the prior art.

Description

Air shock absorber, suspension system and vehicle using the same

technical field

The present invention relates to an air damper, a suspension system and a vehicle using the air damper.

Background technique

During the driving process of the vehicle, due to the uneven road surface and the frequent occurrence of bumpy roads such as speed bumps, the vehicle body bumps more seriously when the vehicle encounters the above situation, which reduces the comfort of the passengers. Therefore, at present, air shock absorbers are installed in the suspension system in existing vehicles. By reducing the stiffness of the suspension and adjusting the damping force of the shock absorber, the bumps of the car body are reduced and a more comfortable ride is obtained. experience. However, due to the reduction of the stiffness and damping of the suspension, it also brings about insufficient handling, and the rolling feeling of the car body is large, which leads to a decrease in the sense of driving safety, and the balance between operation stability and riding comfort becomes the most important part of the suspension system. Urgent problem to be solved.

The utility model patent with the authorization announcement number CN206357947U and the authorization announcement date of 2017.07.28 discloses an air vibration damping system and a vehicle using the system. The air vibration damping system includes an air damper, and the air damper includes a detection working cylinder block. A pressure sensor for air pressure, a solenoid valve is arranged in the upstream pipeline of the air shock absorber, the solenoid valve has an atmospheric communication port, an air inlet and an air outlet connected in series in the pipeline, and the air shock absorber also includes a solenoid valve for controlling The valve conducts the air inlet and the air outlet when the air pressure in the working cylinder is low, conducts the air outlet when the air pressure is high, and disconnects the air outlet and the air communication port. According to the pressure value measured by the pressure sensor, the damping force of the air shock absorber is adjusted by controlling the manual control switch and manually adjusting the air switch. However, this utility model patent requires additional airbags and matching inflatable pipelines and valves. The supporting equipment occupies a large body space, and the application of this kind of air shock absorber has certain limitations in today's increasingly complex vehicle body structure.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an air shock absorber, which solves the problem that the air shock absorber occupies a large space in the prior art; in addition, the purpose of the present invention is to provide a suspension system using the air shock absorber and the vehicle.

In order to achieve the above purpose, the first technical solution of the air shock absorber of the present invention is: the air shock absorber includes a cylinder body, the cylinder body has a closed working cavity, and a sliding assembly in the working cavity divides the working cavity into a rod cavity. And the rodless cavity piston, the piston is provided with a damping hole connecting the rod cavity and the rodless cavity, and there is no need to additionally set up an airbag and an inflation and deflation pipeline to realize the inflation and deflation of the rod cavity and the rodless cavity to achieve vibration reduction. It can solve the problem that the air shock absorber occupies a large space in the prior art.

The second technical solution of the air shock absorber of the present invention is: on the basis of the first technical solution of the air shock absorber of the present invention, the damping holes are provided with at least two to ensure that the piston is uniformly stressed.

The third technical solution of the air shock absorber of the present invention is: on the basis of the first or second technical solution of the air shock absorber of the present invention, the damping hole is provided with a damper for adjusting the passage through the damping hole. The flow control valve of the gas flow adjusts the size of the orifice through the opening of the flow control valve, and adjusts the air exchange rate between the rod cavity and the rodless cavity, so as to realize the adjustment of the hardness of the air shock absorber.

The fourth technical solution of the air shock absorber of the present invention is: on the basis of the third technical solution of the air shock absorber of the present invention, the flow control valve is an electromagnetic damping valve, which is convenient to be integrated into the piston .

The first technical solution of the suspension system of the present invention is: the suspension system includes an air shock absorber for connecting the axle and the frame, the air shock absorber includes a cylinder block, and the cylinder block has a closed working cavity, and the working cavity The inner sliding assembly is equipped with a piston that divides the working cavity into a rod cavity and a rodless cavity. The piston is provided with a damping hole that communicates with the rod cavity and the rodless cavity. There is no need to additionally provide an airbag and an inflation and deflation pipeline to realize the rod cavity. Inflating and deflating the rodless cavity to achieve the function of damping, solving the problem of the large space occupied by the air shock absorber in the prior art.

The second technical solution of the suspension system of the present invention is: on the basis of the first technical solution of the suspension system of the present invention, the damping holes are provided with at least two to ensure that the piston is uniformly stressed.

The third technical solution of the suspension system of the present invention is: on the basis of the first or second technical solution of the suspension system of the present invention, the damping hole is provided with a function for adjusting the gas flow rate passing through the damping hole The size of the damping hole is adjusted by the opening of the flow control valve, and the air exchange rate between the rod cavity and the rodless cavity is adjusted, so as to realize the adjustment of the hardness of the air shock absorber.

The fourth technical solution of the suspension system of the present invention is: on the basis of the third technical solution of the suspension system of the present invention, the flow control valve is an electromagnetic damping valve, which is convenient to be integrated into the piston.

The first technical solution of the vehicle of the present invention is: the vehicle includes a vehicle frame, an axle and a suspension system disposed between the vehicle axle and the vehicle frame, and the suspension system includes an air shock absorber connecting the vehicle axle and the vehicle frame, The air shock absorber includes a cylinder body, and the cylinder body has a closed working cavity. The working cavity is slidably fitted with a piston that divides the working cavity into a rod cavity and a rodless cavity. The piston is provided with a connecting rod cavity and a rodless cavity. The damping hole eliminates the need to additionally provide an airbag and an inflation and deflation pipeline to achieve the function of inflating and deflating the rod cavity and the rodless cavity to achieve the function of damping, and solves the problem of the large space occupied by the air shock absorber in the prior art.

The second technical solution of the vehicle of the present invention is: on the basis of the first technical solution of the vehicle of the present invention, the damping holes are provided with at least two to ensure that the piston is evenly stressed.

The third technical solution of the vehicle of the present invention is: on the basis of the first or second technical solution of the vehicle of the present invention, the damping hole is provided with a flow control valve for adjusting the flow of gas passing through the damping hole , adjust the size of the damping hole through the opening of the flow control valve, and adjust the air exchange rate between the rod cavity and the rodless cavity, so as to realize the adjustment of the hardness of the air shock absorber.

The fourth technical solution of the vehicle of the present invention is: on the basis of the third technical solution of the vehicle of the present invention, the flow control valve is an electromagnetic damping valve, which is convenient to be integrated into the piston.

The fifth technical solution of the vehicle of the present invention is: on the basis of the fourth technical solution of the vehicle of the present invention, the vehicle further includes a controller for controlling the opening degree of the electromagnetic damping valve and a signal for collecting the vehicle signal and The signal acquisition sensor that transmits the signal to the controller enables the air shock absorber to automatically adjust the degree of softness and hardness according to the vehicle conditions.

Description of drawings

FIG. 1 is a schematic structural diagram of a specific embodiment 1 of a vehicle of the present invention;

FIG. 2 is a schematic structural diagram of the air shock absorber of the specific embodiment 1 of the vehicle of the present invention;

FIG. 3 is a schematic structural diagram of an air shock absorber according to Embodiment 2 of the vehicle of the present invention.

Detailed ways

The embodiments of the present invention will be further described below with reference to the accompanying drawings.

A specific embodiment of the vehicle of the present invention, as shown in FIG. 1 to FIG. 2, the vehicle includes a frame 1, an axle 2 and a suspension system interposed between the axle 2 and the frame 1, and the suspension system includes a connecting vehicle The air shock absorber 3 of the axle 2 and the frame 1, the air shock absorber 3 includes a cylinder block 4, and the cylinder block 4 has a built-in piston 5, and the piston 5 is slidably assembled with the inner wall of the cylinder block 4, wherein the cylinder block 4 is a closed structure to ensure The inner cavity of the cylinder block 4 cannot exchange gas with the outside, and the piston 5 is provided with a piston rod 6. The piston 5 divides the working cavity of the cylinder block 4 into a rod cavity 9 and a rodless cavity 8, in which the piston rod 6 is placed. One end is a rod cavity 9 , and the end without the piston rod 6 is a rodless cavity 8 . The piston rod 6 of the air shock absorber 3 is also provided with a frame hinge end 13 connected with the vehicle frame 1 , and the cylinder block 4 is provided with an axle hinge end 14 connected with the vehicle axle 2 .

The piston 5 is provided with two damping holes 7, and the two damping holes 7 are symmetrically arranged on both sides of the piston 5 with the central axis of the piston 5. The two damping holes 7 serve the purpose of passing through the rod cavity 9 and the rodless cavity 8, and The diameter of the orifice 7 is slightly smaller. Of course, in other embodiments, any number of orifices such as one or three may also be provided.

In this embodiment, two damping holes 7 are provided with electromagnetic damping valves 12. The electromagnetic damping valves 12 are electromagnetically controlled, and the signal acquisition sensor 11 placed on the vehicle body 1 transmits the vehicle condition signal to the controller 10. The actuator 10 releases electromagnetic signals to control the opening of the electromagnetic damping valve 12, control the throttling resistance, adjust the softness and hardness of the air shock absorber 3, and find a better balance between comfort and operational stability. Among them, the electromagnetic damping valve 12 constitutes a flow control valve.

When the air shock absorber 3 is initially used, the cylinder 4 is first filled with high-pressure gas. When the vehicle is not started or is running on a smooth road, the piston 5 moves downward along the inner wall of the cylinder 4 due to the weight of the vehicle body 1 . Slip, the volume compression of the rodless cavity 8 increases the pressure of the air in the rodless cavity 8, and the rod cavity 9 begins to generate a thrust to the piston 5 to hinder the downward movement of the piston 5. Through the damping hole 7, the air in the rod cavity 9 begins to flow into the rodless cavity 8 with lower pressure. At this time, the rod cavity 9 begins to generate thrust on the piston 5. When the rod cavity 9 and the rodless cavity are When the pressures of The existence of , so that the force area of the gas in the rod cavity 9 to the piston 5 is the bottom surface area of the piston 5 minus the bottom surface area of the piston rod 6, although the pressure of the air in the rod cavity 9 and the rodless cavity 8 is the same, However, the thrust of the rod chamber 9 on the piston 5 is smaller than the thrust of the rodless chamber 8 on the piston 5. At this time, the pressure of the vehicle body 1 on the piston 5 and the self-weight of the piston 5 are equal to the thrust of the rodless chamber 8 on the piston 5 and the The difference between the thrust of the rod cavity 9 and the piston 5 stops the downward movement of the piston 5 and reaches the equilibrium position in the cylinder 4 .

When the car body 1 encounters a raised ground, the wheel lifts up relative to the car body 1, the air shock absorber 3 is compressed, the piston 5 continues to slide down along the inner wall of the cylinder 4, the volume of the rodless cavity 8 continues to compress, and the rodless cavity 8 continues to compress. The pressure in the cavity 8 increases, which increases the thrust of the air in the rodless cavity 8 to the piston rod 6. At the same time, the increase in the volume of the rod cavity 9 reduces the thrust of the rod cavity 9 on the piston 5. The gas flows into the rod cavity 9 through the damping hole 7, and finally makes the pressure in the rod cavity 9 and the rodless cavity 8 equal. The difference between the thrust of the air in the rod cavity 8 to the piston 5 and the thrust of the rod cavity 9, the piston 5 reaches a new balance, at this time the piston 5 stops moving down, and reaches a new equilibrium position in the cylinder 4.

After the impact force caused by the inertia of the vehicle body 1 is buffered by the air shock absorber 3, due to the downward movement of the piston 5, the piston rod 6 further extends into the cylinder block 4 to reduce the overall volume of the cylinder block 4. The pressures of the rod cavity 9 and the rodless cavity 8 both increase, so that the thrust of the rodless cavity 8 to the piston 5 is greater than the sum of the thrust of the rod cavity 9 to the piston 5, the pressure of the car body 1 to the piston 5 and the weight of the piston 5. , at this time, the thrust of the air in the rodless cavity 8 to the piston 5 pushes the piston 5 to move up. Due to the push-out of the piston rod 6, the overall volume of the cylinder 4 begins to recover, and finally returns to the initial state of the overall volume of the cylinder 4 At this time, the thrust of the air in the rodless cavity 8 to the piston 5 is equal to the thrust of the air in the rod cavity 9 to the piston 5, the pressure of the vehicle body 1 to the piston 5 and the self-weight of the piston 5, and the piston 5 stops moving upward. , that is, the initial position of the piston 5 in the cylinder 4 is reached, and the air shock absorber 3 is reset.

Preferably, an electromagnetic damping valve 12 is installed in the damping hole 7, and the electromagnetic signal is controlled by the controller 10 to adjust the opening of the electromagnetic damping valve 12, so that the air flow rate between the rod cavity 9 and the rodless cavity 8 can be adjusted, Adjusting the degree of softness and hardness of the air shock absorber 3 is convenient to automatically adjust the hardness of the appropriate air shock absorber 3 according to different road conditions and the needs of the driver.

When the vehicle is running at a high speed, the signal collection sensor 11 collects vehicle condition information and transmits the vehicle condition information to the controller 10. The controller 10 makes a judgment based on the vehicle condition information, controls the electromagnetic damping valve 12, and adjusts the opening of the electromagnetic damping valve 12 to a smaller value and an increased Throttling resistance, the electromagnetic damping valve 12 provides a larger damping force, which makes the vehicle run more smoothly and obtains better handling stability.

When the vehicle is driving on an uneven road, the controller 10 makes a judgment based on the vehicle condition information transmitted by the signal acquisition sensor 11, controls the electromagnetic damping valve 12, increases the opening of the electromagnetic damping valve 12, reduces the throttling resistance, and the electromagnetic damping valve 12 Provides a smaller damping force, and the vehicle's ability to filter high-frequency and low-frequency vibrations is enhanced, making the vehicle run more smoothly and obtaining better ride comfort.

When the vehicle urgently changes lanes, brakes or accelerates rapidly, the controller 10 makes a judgment based on the vehicle condition information transmitted by the signal acquisition sensor 11, controls the electromagnetic damping valve 12, reduces the opening of the electromagnetic damping valve 12, and increases the throttle resistance, the electromagnetic damping valve 12 provides a larger damping force, which makes the vehicle run more smoothly, reduces the pitch of the whole vehicle, and obtains better handling stability.

The air shock absorber 3 of the present invention can achieve the purpose of vibration reduction, can adjust different degrees of softness and hardness according to different vehicle conditions, and does not need to use other auxiliary components to achieve the purpose of reset, saves the installation space of the vehicle suspension, and greatly simplifies The suspension structure is improved, the weight of the car body 1 is reduced, the ride comfort is improved, and the softness and hardness of the air shock absorber 3 are actively adjusted or passively adjusted through the electronic control system, and the structure is simple, and the driving comfort and handling stability are improved.

The difference between the specific embodiment 2 of the vehicle of the present invention and the specific embodiment 1 of the vehicle of the present invention is only that as shown in FIG. 3 , there is no electromagnetic damping valve in the damping hole 27 .

The specific embodiment of the suspension system of the present invention is the same as the suspension system described in the specific embodiment 1 or 2 of the vehicle of the present invention, and will not be repeated.

The specific embodiment of the air shock absorber of the present invention is the same as the air shock absorber described in the specific embodiment 1 or 2 of the vehicle of the present invention, and will not be repeated.

In the air shock absorber of the present invention, the suspension system using the air shock absorber, and other embodiments of the vehicle, the numbers of the damping holes on the piston and the electromagnetic damping valves are arbitrary.

The above content is a further detailed description of the present invention in conjunction with a specific embodiment, and it cannot be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art to which the present invention belongs, without departing from the concept of the present invention, some simple deductions or substitutions can be made, which should be regarded as the protection scope of the present invention.

Claims (9)

1. The air shock absorber is characterized in that: it comprises a cylinder body, the cylinder body has a closed working cavity, and the working cavity is slidably fitted with a piston that divides the working cavity into a rod cavity and a rodless cavity, and the piston is provided with a communication Orifice for rod cavity and rodless cavity. 2 . The air shock absorber according to claim 1 , wherein the damping holes are provided with at least two. 3 . 3. The air shock absorber according to claim 1 or 2, wherein the damping hole is provided with a flow control valve for adjusting the flow rate of gas passing through the damping hole. 4. The air shock absorber according to claim 3, wherein the flow control valve is an electromagnetic damping valve. 5. The suspension system, including the air shock absorber for connecting the axle and the frame, is characterized in that: the air shock absorber includes a cylinder body, the cylinder body has a closed working cavity, and the working cavity is slidably assembled with a working cavity. The piston is divided into a rod cavity and a rodless cavity, and the piston is provided with a damping hole which communicates with the rod cavity and the rodless cavity. 6. The suspension system according to claim 5, wherein at least two damping holes are provided. 7 . The suspension system according to claim 5 or 6 , wherein a flow control valve for adjusting the flow of gas passing through the orifice is provided in the orifice. 8 . 8. The suspension system according to claim 7, wherein the flow control valve is an electromagnetic damping valve. 9. A vehicle, comprising a vehicle frame, a vehicle axle and a suspension system placed between the vehicle axle and the vehicle frame, the suspension system comprising an air damper connecting the vehicle axle and the vehicle frame, characterized in that: the air damping The shock absorber is the air shock absorber described in any one of the above claims 1-4.