CN203627631U - Semi-active parallel air spring - Google Patents

Abstract

The utility model relates to a semi-active parallel air spring, which consists of an upper chamber air valve, a pressure sensor, a cylinder, an upper air chamber, a sealing ring, an air pump, a floating piston, a lower air chamber, a lower chamber air valve, an air pipe, a piston rod and Controller composition. The utility model has the advantages of simple structure, relatively low cost, and convenient installation. When moving in two directions, it can generate relatively large elastic force, and the spring stiffness also gradually increases; Get the initial load of the car and adjust its initial stiffness, which can also play a role in adjusting the height of the car body, and can adjust the stiffness in real time according to the road surface conditions during the driving process of the car to improve the ride comfort and handling stability of the car sex and passability.

Description

Semi Active Parallel Air Spring

technical field

The utility model belongs to the technical field of automobile vibration reduction, in particular to a semi-active parallel air spring with adjustable stiffness.

Background technique

The ride comfort of automobiles has been paid more and more attention by people. In the prior art, most of the spring elements used in vehicles are coil springs, and their spring stiffness is constant. Although the stiffness of traditional air springs can be changed, their stiffness tends to increase gradually when compressed, and when stretched. However, the time gradually decreases, so that it cannot meet the requirements of many suspension devices or vibration damping devices.

Contents of the invention

The purpose of this utility model is to provide a semi-active parallel air spring, which can make the spring stiffness gradually increase when the suspension device or the shock absorber is compressed and stretched, and its initial stiffness can be adjusted according to the load at the initial position of the car , at the same time, it can play the role of adjusting the height of the vehicle body; and the stiffness can be adjusted in real time according to the road surface conditions during the driving of the car.

The utility model is realized through the following technical solutions:

A semi-active parallel air spring, including an upper chamber air valve 1, an upper chamber pressure sensor 2A, a lower chamber pressure sensor 2B, a cylinder 3, an upper chamber 4, a sealing ring 5, an upper chamber air pump 6A, and a lower chamber air pump 6B , Floating piston 7, lower air chamber 8, lower chamber air valve 9, upper chamber trachea 10A, lower chamber trachea 10B, piston rod 11 and controller 12.

The floating piston 7 divides the inner space of the cylinder 3 into two parts, the upper air chamber 4 and the lower air chamber 8, the upper end of the upper air chamber 4 has an upper chamber air valve 1, and the lower end of the lower air chamber 8 has a lower chamber The air valve 9, the piston rod 11 and the floating piston 7 are connected together, and the sealing ring 5 is sleeved on the outer end of the floating piston 7 to ensure good sealing of the upper and lower air chambers.

The upper cavity air pump 6A and the lower cavity air pump 6B are respectively connected to the upper cavity air valve 1 and the lower cavity air valve 9 through the upper cavity air tube 10A and the lower cavity air tube 10B.

The upper chamber pressure sensor 2A and the lower chamber pressure sensor 2B are respectively arranged on the upper end surface and the lower end surface of the cylinder 3 to monitor the gas pressure in the upper air chamber 4 and the lower air chamber 8 in real time, and send the pressure signal to In the controller 12.

The input end of the controller 12 is connected with the outputs of the two pressure sensors 2A, 2B, and the output end is connected with the air pumps 6A, 6B.

The controller 12 controls the air pumps 6A, 6B and air valves 1, 9 according to the pressure signals measured by the two pressure sensors 2A, 2B; when the required spring stiffness is large, the controller 12 controls the air pumps 6A, 6B to move upward The lower air chambers 4 and 8 are inflated; when the required spring stiffness is small, the controller 12 controls the opening of the air valves 1 and 9 to deflate the upper and lower air chambers 4 and 8.

Optionally, the utility model may only include an air pump 6, which is connected to the upper cavity air valve 1 and the lower cavity air valve 9 through the upper cavity air tube 10A and the lower cavity air tube 10B. At the same time, the upper and lower air chambers 4 and 8 are filled with gas of the same pressure to achieve adjustable symmetric spring stiffness; or by adjusting the air valves 1 and 9 to achieve different pressures in the upper and lower air chambers 4 and 8 to obtain adjustable asymmetry spring rate.

The working process of the present utility model is:

1) Before the vehicle starts, the pressure signals of the upper and lower air chambers 4 and 8 measured by the pressure sensors 2A and 2B can be used to obtain the load of the vehicle by using the pressure difference; The lower chamber air valve 9 fills the air chamber with a certain amount of gas, so that the vehicle body height can be adjusted according to the load condition, and the initial volume of the air chamber can also be controlled.

2) When in passive mode, both air valves 1 and 9 are closed:

Under the action of external force, when the piston rod 11 moves upward, the floating piston 7 is pushed upward, compressing the upper air chamber 4, so that the gas pressure in the upper air chamber 4 gradually increases, and the greater the upward displacement of the piston rod 11 , the greater the pressure generated by the upper air chamber 4;

When the piston rod 11 moves downward, the floating piston 7 is pulled to move downward, compressing the lower air chamber 8, so that the pressure of the lower air chamber 8 gradually increases, and the greater the downward displacement of the piston rod 11, the lower air chamber 8 generates the greater the pressure;

In this way, the spring stiffness increases continuously with the increase of the displacement.

3) When in the semi-active mode, the controller 12 controls the air supply pressure of the air pumps 6A, 6B and the opening and closing of the air valves 1, 9 in real time according to the pressure signals measured by the two pressure sensors 2A, 2B; real-time Inflate and deflate the upper and lower air chambers 4 and 8 to realize the semi-active control of parallel air springs to improve the ride comfort of the vehicle.

The utility model has the advantages of simple structure, relatively low cost and convenient installation. When moving in two directions, a large elastic force can be generated, and the spring stiffness also gradually increases; and the initial load of the car can be obtained according to the signal of the upper and lower pressure sensors, And adjust its initial stiffness, at the same time, it can play the role of adjusting the height of the vehicle body, and can adjust its stiffness in real time according to the road surface conditions during the driving process of the car, so as to improve the ride comfort, handling stability and passability of the vehicle.

Description of drawings

Fig. 1 is a kind of embodiment of the utility model.

Fig. 2 is another embodiment of the utility model.

Fig. 3 is the stiffness characteristic curve of the utility model.

In the picture:

1. Upper chamber air valve; 2A, upper chamber pressure sensor; 2B, lower chamber pressure sensor;

3. Cylinder; 4. Upper air chamber; 5. Seal ring; 6. Air pump; 6A, Upper cavity air pump;

6B, lower cavity air pump; 7, floating piston; 8, lower air chamber; 9, lower cavity air valve;

10A, upper cavity trachea; 10B, lower cavity trachea; 11, piston rod; 12, controller;

F, the force of the floating piston; s, the displacement of the floating piston.

Detailed ways

The utility model is described in detail below in conjunction with accompanying drawing.

As shown in Figure 1, it is an embodiment of the utility model, a semi-active parallel air spring shown, including an upper cavity air valve 1, an upper cavity pressure sensor 2A, a lower cavity pressure sensor 2B, a cylinder 3, and an upper air chamber 4. Sealing ring 5, upper cavity air pump 6A, lower cavity air pump 6B, floating piston 7, lower air chamber 8, lower cavity air valve 9, upper cavity trachea 10A, lower cavity trachea 10B, piston rod 11 and controller 12 .

The floating piston 7 divides the inner space of the cylinder 3 into two parts, the upper air chamber 4 and the lower air chamber 8, the upper end of the upper air chamber 4 has an upper chamber air valve 1, and the lower end of the lower air chamber 8 has a lower chamber The air valve 9, the piston rod 11 and the floating piston 7 are connected together, and the sealing ring 5 is sleeved on the outer end of the floating piston 7 to ensure good sealing of the upper and lower air chambers.

The upper cavity air pump 6A and the lower cavity air pump 6B are respectively connected to the upper cavity air valve 1 and the lower cavity air valve 9 through the upper cavity air tube 10A and the lower cavity air tube 10B.

The upper chamber pressure sensor 2A and the lower chamber pressure sensor 2B are respectively arranged on the upper end surface and the lower end surface of the cylinder 3 to monitor the gas pressure in the upper air chamber 4 and the lower air chamber 8 in real time, and send the pressure signal to In the controller 12.

The input end of the controller 12 is connected with the outputs of the two pressure sensors 2A, 2B, and the output end is connected with the air pumps 6A, 6B.

The controller 12 controls the air pumps 6A, 6B and air valves 1, 9 according to the pressure signals measured by the two pressure sensors 2A, 2B; when the required spring stiffness is large, the controller 12 controls the air pumps 6A, 6B to move upward The lower air chambers 4 and 8 are inflated; when the required spring stiffness is small, the controller 12 controls the opening of the air valves 1 and 9 to deflate the upper and lower air chambers 4 and 8.

As shown in Figure 2, it is another embodiment of the utility model, that is, the utility model can also only include an air pump 6, and simultaneously fill the upper and lower air chambers 4, 8 with gas of the same pressure to realize adjustable size Symmetrical spring stiffness; or by adjusting the air valves 1, 9 to achieve different pressures in the upper and lower air chambers 4, 8 to obtain adjustable asymmetric spring stiffness.

Fig. 3 is the stiffness characteristic curve of the present utility model, i.e. the F-s curve, the reaction force of the force F of the floating piston is the elastic force provided to the outside world, and the slope of the curve at a certain point in the figure is the spring stiffness at this point.

The working process of the present utility model is:

1) Before the vehicle starts, the pressure signals of the upper and lower air chambers 4 and 8 measured by the pressure sensors 2A and 2B can be used to obtain the load of the vehicle by using the pressure difference; The lower chamber air valve 9 fills the air chamber with a certain amount of gas, so that the vehicle body height can be adjusted according to the load condition, and the initial volume of the air chamber can also be controlled.

2) When in passive mode, both air valves 1 and 9 are closed:

Under the action of external force, when the piston rod 11 moves upward, the floating piston 7 is pushed upward, compressing the upper air chamber 4, so that the gas pressure in the upper air chamber 4 gradually increases, and the greater the upward displacement of the piston rod 11 , the greater the pressure generated by the upper air chamber 4;

When the piston rod 11 moves downward, the floating piston 7 is pulled to move downward, compressing the lower air chamber 8, so that the pressure of the lower air chamber 8 gradually increases, and the greater the downward displacement of the piston rod 11, the lower air chamber 8 generates the greater the pressure;

In this way, the spring stiffness has been continuously increased with the increase of the displacement, as shown in the solid line and the dashed line in Fig. 3, which are two kinds of symmetrical spring stiffness, wherein the solid line is under the minimum pressure, the utility model can provide The spring stiffness; the dotted line is the spring stiffness that the utility model can provide when the air pumps 6A and 6B provide the maximum inflation pressure.

3) When in the semi-active mode, the controller 12 controls the air supply pressure of the air pumps 6A, 6B and the opening and closing of the air valves 1, 9 in real time according to the pressure signals measured by the two pressure sensors 2A, 2B; real-time Inflate and deflate the upper and lower air chambers 4 and 8 to realize the semi-active control of parallel air springs to improve the ride comfort of the vehicle.

It should be noted that the stiffness of the spring in the present invention can be symmetrical or asymmetrical, which can be adjusted by the air pumps 6A, 6B. By adjusting the inflation pressure of the upper air chamber 4 and the lower air chamber 8, the stiffness of the air spring can be adjusted as required in the area formed between the solid line and the dashed line in FIG. 3 .

Claims (2)

1. one and half actives pneumatic spring in parallel, comprise cylinder (3), upper gas chamber (4), seal ring (5), floating piston (7), lower chamber (8), epicoele tracheae (10A), cavity of resorption tracheae (10B) and piston rod (11), described floating piston (7) is divided into upper gas chamber (4) and (8) two parts of lower chamber the inner space of cylinder (3), piston rod (11) and floating piston (7) are connected, and seal ring (5) is enclosed within the outer end of floating piston (7); It is characterized in that:

Also comprise epicoele air valve (1), upper cavity pressure sensor (2A), cavity of resorption pressure transducer (2B), epicoele gas-filled pump (6A), cavity of resorption gas-filled pump (6B), cavity of resorption air valve (9) and controller (12);

Described epicoele gas-filled pump (6A), cavity of resorption gas-filled pump (6B) are connected with epicoele air valve (1), cavity of resorption air valve (9) by epicoele tracheae (10A), cavity of resorption tracheae (10B) respectively;

Described epicoele air valve (1) and upper cavity pressure sensor (2A) are arranged on the upper end of upper gas chamber (4), and cavity of resorption pressure transducer (2B) and cavity of resorption air valve (9) are arranged on the bottom of lower chamber (8);

The input end of described controller (12) is connected with the output of two pressure transducers (2A, 2B), and output terminal is connected with gas-filled pump (6A, 6B).

2. initiatively pneumatic spring in parallel of one according to claim 1 half, is characterized in that:

Only comprise a gas-filled pump (6), be connected with epicoele air valve (1), cavity of resorption air valve (9) by epicoele tracheae (10A), cavity of resorption tracheae (10B).

Images