WO2021073652A1

WO2021073652A1 - Method and system for adjusting height of suspension system

Info

Publication number: WO2021073652A1
Application number: PCT/CN2020/122008
Authority: WO
Inventors: 张晓锋; 孙国; 于曼华; 冯永江; 张加
Original assignee: 安路普（北京）汽车技术有限公司
Priority date: 2019-10-18
Filing date: 2020-10-19
Publication date: 2021-04-22
Also published as: CN110626140A; CN110626140B

Abstract

A method and a system (100) for adjusting a height of a suspension system. The system comprises: arranging a pneumatic valve (130) and an air spring (140) between a first connecting part (110) and a second connecting part (120), wherein the positions of the pneumatic valve (130) and the air spring (140) are adaptive to each other; connecting the gas output end of the pneumatic valve (130) with the gas input end of the air spring (140); the pneumatic valve (130) collecting, at least one motion variable, relative to the second connecting part (120), of the first connecting part (110); and meanwhile, making the pneumatic valve (130) change its own operation stroke according to the collected motion variable and/or a change in motion variable, so as to connect the air spring (140) with a gas source generating gas flow to inflate the air spring (140), or connect the air spring (140) with an atmosphere to generate gas flow therebetween to deflate the air spring (140) and adjust the height.

Description

Method and system for adjusting height of suspension system

Cross reference of related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on October 18, 2019, the application number is 201910991551.1, and the title is "A method and system for adjusting the height of a suspension system", the entire content of which is incorporated by reference In this application.

Technical field

The invention relates to the field of height adjustment of a suspension system, in particular to a method and a system for adjusting the height of a suspension system.

Background technique

The existing suspension system mainly realizes the function of height adjustment through an electronic control method or a mechanical method. The electronic control adjustment method is mainly to use the sensor to collect the height signal, and send the collected height signal to the central processor. The central processor calculates the corresponding control signal and sends the control signal to the corresponding actuator. The actuator controls the air spring to inflate or deflate to achieve height adjustment. The mechanical adjustment method is mainly realized by the linkage and cooperation of multiple mechanical parts. For example, in the seat suspension system, CN206155232U discloses a seat. The seat passes through a first rotating plate, a rotating part, a limit plate, and a limiter. The coordinated linkage between the position pin and the limit groove realizes the height adjustment of the seat. Although this height adjustment mechanism can well realize the height adjustment function of the seat, the mechanical structure is more complicated and the cost is higher. , Installation and maintenance are inconvenient.

Summary of the invention

In view of the above problems, the present invention is proposed to provide a method and system for adjusting the height of a suspension system that overcomes the above problems or at least partially solves the above problems.

According to one aspect of the present invention, there is provided a method for adjusting the height of a suspension system, the method comprising:

Arrange a pneumatic valve and an air spring between the first connecting part and the second connecting part, the positions of the pneumatic valve and the air spring are adapted; and the gas output end of the pneumatic valve and the gas input of the air spring End connection

The pneumatic valve collects at least one movement variable of the first connecting portion relative to the second connecting portion;

At the same time, the pneumatic valve changes its working stroke according to the collected motion variable and/or the change of the motion variable, so that the air spring is connected with the air source to generate a gas flow connection, and the air spring is inflated; or , So that a gas flow connection is generated between the air spring and the atmosphere, the air spring is deflated, and the height adjustment is realized.

According to another aspect of the present invention, there is provided a system for adjusting the height of a suspension system, the system comprising a first connecting part, a second connecting part, at least one pneumatic valve and an air spring;

The pneumatic valve and the air spring are arranged between the first connecting part and the second connecting part, and the positions of the pneumatic valve and the air spring are adapted;

The gas output end of the pneumatic valve is connected to the gas input end of the air spring;

The pneumatic valve is used to collect at least one movement variable of the first connecting portion relative to the second connecting portion; at the same time, change its work according to the collected movement variable and/or the change of the movement variable Stroke, so that the air spring is connected with the air source to achieve gas flow connection, and the air spring is inflated; or, the air spring is connected to the atmosphere to achieve the air spring deflation and height adjustment .

The beneficial effects of the present invention are: the technical solution of the present invention collects at least one movement variable of the first connection part relative to the second connection part through a pneumatic valve, and changes its work according to the collected movement variable and/or the change of the movement variable. Stroke, so that the air spring is inflated or deflated to achieve height adjustment. Compared with the prior art that uses an electronic control method to adjust the height of the suspension system, the technical solution of the present invention improves the sensitivity of height adjustment. In addition, compared with the prior art that uses a complicated mechanical structure to adjust the height of the suspension system, the pneumatic valve of the technical solution of the present invention can collect and control the positional relationship by changing its working stroke. The structure is simple and easy to install. And maintenance, low cost.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, it can be implemented in accordance with the content of the specification, and in order to make the above and other objectives, features and advantages of the present invention more obvious and understandable. In the following, specific embodiments of the present invention will be cited.

Description of the drawings

By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only used for the purpose of illustrating the preferred embodiments, and are not considered as a limitation to the present invention. Also, throughout the drawings, the same reference symbols are used to denote the same components. In the attached picture:

Fig. 1 shows a flowchart of a method for adjusting the height of a suspension system according to an embodiment of the present invention;

Figure 2 shows a schematic diagram of the positional relationship of the first connecting portion relative to the second connecting portion according to an embodiment of the present invention;

Figure 3 shows a schematic diagram of the functional structure of a system for adjusting the height of a suspension system according to an embodiment of the present invention;

Description of the drawings:

First connecting part 110; second connecting part 120; upper working stroke end S31; lower working stroke end S32; upper limit position of suspension S21; lower limit position of suspension S22; upper limit position of balance S11; lower limit position of balance S12; balance position of total working stroke S00; system 100 for adjusting the height of the suspension system; pneumatic valve 130; air spring 140; adjusting device 150.

Detailed ways

Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the drawings show exemplary embodiments of the present disclosure, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

Example one

Fig. 1 shows a flowchart of a method for adjusting the height of a suspension system according to an embodiment of the present invention. As shown in Fig. 1, a method for adjusting the height of a suspension system includes:

In step S110, the pneumatic valve and the air spring are arranged between the first connecting part and the second connecting part, and the positions of the pneumatic valve and the air spring are adapted; and the gas output end of the pneumatic valve is connected to the gas input end of the air spring.

In this step, the pneumatic valve has a linear structure. The pneumatic valve includes a driving rod and a valve body. The driving rod makes a reciprocating linear motion in the valve body. The driving rod is connected to the first connecting part, and the valve body is connected to the second connecting part. The position adaptation of the pneumatic valve and the air spring includes that the longitudinal axis of the pneumatic valve is parallel or coincides with the longitudinal axis of the air spring, or the longitudinal axis of the pneumatic valve is not parallel or coincides with the longitudinal axis of the air spring. Preferably, the longitudinal axis of the pneumatic valve is parallel to or coincides with the longitudinal axis of the air spring. It should be noted that the position of the pneumatic valve and the air spring is not further limited in this embodiment. As long as the pneumatic valve can collect the movement variable between the first connection part and the second connection part, the air spring can be located between the first connection part and the second connection part. It is sufficient to provide support between the second connections. The gas output end of the pneumatic valve is connected with the gas input end of the air spring, so that the pneumatic valve and the air spring generate a gas flow connection, so that the pneumatic valve controls the air spring to inflate or deflate, and to achieve height adjustment.

In addition, if the first connecting portion includes the cab, the second connecting portion includes the chassis frame, that is, the pneumatic valve and the air spring are arranged between the cab and the chassis frame. If the first connecting portion includes the vehicle chassis, the second connecting portion includes wheels, that is, the pneumatic valve and the air spring are arranged between the vehicle chassis and the wheels. If the first connecting portion includes the upper frame of the seat, the second connecting portion includes the lower frame of the seat, that is, the pneumatic valve and the air spring are arranged between the upper frame of the seat and the lower frame of the seat. If the first connecting part includes the sliding horizontal axis of the seat scissors frame, the second connecting part includes the rotating pin of the seat scissors frame, that is, the pneumatic valve and the air spring are arranged on the sliding horizontal axis and the seat of the seat scissors frame. Between the pivot pins of the chair scissor frame.

In step S120, the pneumatic valve collects at least one movement variable of the first connecting part relative to the second connecting part.

In this step, the motion variable includes the positional relationship of the first connecting portion with respect to the second connecting portion.

Step S130, at the same time, the pneumatic valve changes its working stroke according to the collected movement variables and/or changes in the movement variables, so that the air spring is connected with the air source to generate gas flow connection, and the air spring is inflated; or, the air spring is connected to the atmosphere. There is a gas flow connection between them to realize the air spring deflation and realize the height adjustment.

In this step, the change of the motion variable is determined by at least two temporally continuous motion variables of the first connecting part relative to the second connecting part. After the pneumatic valve collects the movement variable between the first connection part and the second connection part, or after the pneumatic valve collects the movement variable between the first connection part and the second connection part, or the pneumatic valve collects After the movement variable between the first connection part and the second connection part and the movement variable change, the working stroke of the pneumatic valve changes, so that a gas flow connection is formed between the air spring and the air source, and the air spring is inflated, or , So that there is a gas flow connection between the air spring and the atmosphere, to realize the deflation of the air spring and realize the height adjustment.

It can be seen from the above that the technical solution of this embodiment collects at least one movement variable of the first connecting portion relative to the second connecting portion through a pneumatic valve, and changes its working stroke according to the collected movement variable and/or the change of the movement variable, In this way, the air spring is inflated or deflated to achieve height adjustment. Compared with the prior art that uses an electronic control method to adjust the height of the suspension system, the technical solution of this embodiment improves the sensitivity of height adjustment. In addition, compared with the prior art that uses a complex mechanical structure to adjust the height of the suspension system, the pneumatic valve of the technical solution of this embodiment can collect and control the positional relationship by changing its own working stroke. The structure is simple and convenient. Installation and maintenance are low cost.

FIG. 2 shows a schematic diagram of the positional relationship between the first connecting portion and the second connecting portion according to an embodiment of the present invention. As shown in FIG. 2, the motion variable includes the positional relationship between the first connecting portion and the second connecting portion. The positional relationship includes the vertical relationship of the first connecting portion with respect to the second connecting portion, or the horizontal relationship of the first connecting portion with respect to the second connecting portion, or the vertical relationship of the first connecting portion with respect to the second connecting portion Straight relationship and horizontal relationship; that is to say, not only the height can be adjusted according to the vertical relationship of the first connecting portion with respect to the second connecting portion, but also the height can be adjusted according to the horizontal relationship of the first connecting portion with respect to the second connecting portion. For adjustment, the height can also be adjusted simultaneously according to the vertical relationship and the horizontal relationship between the first connecting portion and the second connecting portion. The positional relationship between the first connecting portion and the second connecting portion is the adjusted target value, and the positional relationship between the first connecting portion and the second connecting portion is provided by the total working stroke of the pneumatic valve. Preferably, the positional relationship of the first connecting portion with respect to the second connecting portion corresponds to the total working stroke of the pneumatic valve according to a preset ratio. For example, the positional relationship of the first connecting portion with respect to the second connecting portion corresponds to the total working stroke of the pneumatic valve. The ratio of working stroke is 1:1, 1:2 or 1:3, etc. This embodiment does not further limit the ratio between the positional relationship of the first connecting portion relative to the second connecting portion and the total working stroke of the pneumatic valve. The total working stroke is defined by the upper working stroke end S31 and the lower working stroke end S32; the suspension upper limit position S21 of the pneumatic valve is in the range between the balance position S00 of the total working stroke and the upper working stroke end S31, the lower limit of the suspension of the pneumatic valve The position S22 is in the range between the balance position S00 of the total working stroke and the lower working stroke end S32; the balance range is a sub-range of the total working stroke range defined by the upper limit position S21 of the suspension and the lower limit position S22 of the suspension. The balance range is determined by the balance The upper limit position S11 and the balance lower limit position S12 are defined. For example, the total working stroke range includes (-15mm, +15mm), and the total working stroke range defined by the suspension upper limit position S21 and the suspension lower limit position S22 includes (-10mm, +10mm), balance The range includes (-5mm, +5mm).

Further, adjusting the height according to the position relationship is mainly divided into the following three modes:

In the first mode, if the positional relationship between the first connecting portion and the second connecting portion is within the balance range (S12, S11), the working stroke of the pneumatic valve does not change. Therefore, the pneumatic valve does not control the air spring inflating or discharging. The height of the air spring is the preset basic height. In this case, you can drive on a flat road without adjusting the height of the air spring to maximize comfort.

In the second mode, when the positional relationship between the first connecting portion and the second connecting portion is displaced from the equilibrium upper limit position S11 along the direction of the suspension upper limit position S21, the pneumatic valve controls the air according to the preset first gas flow rate. The spring is deflated, because the flow of the first gas is small, so the height of the air spring is reduced slightly; or, the positional relationship between the first connecting part and the second connecting part is from the lower balance position S12 along the direction of the lower suspension position S22 In the process of displacement, the pneumatic valve controls the air spring to inflate according to the preset first gas flow rate. Because the first gas flow rate is small, the height of the air spring increases slightly; the second mode makes the first connecting part and The height between the second connecting parts is kept within the balance range to realize the suspension adjustment, so as to achieve the best comfort.

In the third mode, when the positional relationship between the first connecting portion and the second connecting portion is displaced from the upper limit position S21 of the suspension along the direction of the upper working stroke end S31, the pneumatic valve is controlled according to the preset second gas flow rate. The air spring is deflated, wherein the second mass flow rate is greater than the first mass flow rate. Because the second gas flow rate is large, the air spring is quickly exhausted, so that the height of the air spring is quickly reduced; or, the positional relationship of the first connecting portion relative to the second connecting portion is along the lower working stroke from the suspension lower limit position S22 In the process of displacement in the direction of the end S32, the pneumatic valve controls the air spring to inflate according to the preset second gas flow rate. Because the second gas flow rate is large, the air spring is inflated quickly, so that the height of the air spring rises quickly. The third mode realizes the rapid charging and discharging of the air spring, reduces the vibration amplitude, and reduces the discomfort caused by the severely bumpy road.

In some embodiments of the present invention, the method shown in FIG. 1 further includes: controlling the working stroke of the pneumatic valve to be shortened, extended, or kept unchanged by the adjusting device, so as to control the air spring to inflate, deflate, or neither inflate nor deflate. The air can realize the gear and memory adjustment of the positional relationship of the first connecting part relative to the second connecting part. For example, the adjusting device may include the following three types. The first type of adjusting device includes an adjusting handle and a cable. The adjusting handle is connected to the pneumatic valve through the cable. Specifically, the adjusting handle changes the working stroke of the pneumatic valve by controlling the length of the cable. In this way, the air spring is inflated or deflated to realize the gear adjustment of the height of the air spring, thereby realizing the gear adjustment of the positional relationship between the first connecting portion and the second connecting portion; at the same time, the length of the cable is fixed by the adjustment handle, so that The working stroke of the pneumatic valve remains unchanged, so that the air spring is neither inflated nor deflated, so as to realize the memory adjustment of the height of the air spring, thereby realizing the memory adjustment of the positional relationship between the first connecting portion and the second connecting portion; in addition, Once the length of the cable is fixed, as described above, the pneumatic valve is used to achieve suspension adjustment at a specific position to improve comfort. The second type of adjustment device includes a motor drive device, which is connected to the pneumatic valve through a cable. Specifically, the motor drive device changes the working stroke of the pneumatic valve by controlling the length of the cable, thereby controlling the inflation or deflation of the air spring , To realize the gear adjustment of the height of the air spring, so as to realize the gear adjustment of the position relationship of the first connecting part relative to the second connecting part; at the same time, the length of the cable is fixed by the motor drive device, so that the working stroke of the pneumatic valve is kept constant. Change, so that the air spring neither inflates nor deflates, realizes the memory adjustment of the air spring height, so as to realize the memory adjustment of the positional relationship between the first connecting part and the second connecting part; in addition, once the length of the cable is fixed, As mentioned above, the pneumatic valve is used to achieve suspension adjustment at a specific position, which improves comfort. The third type of adjustment device includes a motor drive device. The motor drive device is directly connected to the pneumatic valve. The motor drive device directly changes the working stroke of the pneumatic valve or fixes it at a specific position, and then controls the air spring to inflate, deflate or neither inflate nor inflate. Bleed, so that the height of the air spring is raised, lowered or fixed at a specific position to realize the gear and memory adjustment of the air spring height, so as to realize the gear and memory adjustment of the positional relationship between the first connecting part and the second connecting part ; In addition, the suspension adjustment can be realized at a specific position through a pneumatic valve to improve comfort. For example, when the length of the cable becomes longer, the working stroke of the pneumatic valve becomes shorter and controls the air spring to inflate; when the length of the cable becomes shorter, the working stroke of the pneumatic valve becomes longer and the air spring is controlled to deflate. The length of the cable and the working stroke of the pneumatic valve are not further limited. The user can adjust the positional relationship between the first connecting portion and the second connecting portion through the adjusting device according to actual needs, so as to meet the needs of different users.

Further, the equilibrium position between the first connecting portion and the second connecting portion changes with the change of the positional relationship of the first connecting portion with respect to the second connecting portion. The pneumatic valve is used to make the first connecting portion or the second connecting portion change. The part realizes levitation at the equilibrium position of the first connecting part relative to the second connecting part. Specifically, when the adjusting device adjusts the positional relationship between the first connecting portion and the second connecting portion to a specific position through the pneumatic valve, the working stroke of the pneumatic valve is shortened or extended while the pneumatic valve is continuously returned to position, thereby making the pneumatic valve The balance position of the valve does not change relative to itself, but the balance position of the pneumatic valve changes continuously with respect to the first connection part or the second connection part, so that the balance position of the first connection part relative to the second connection part continuously changes , The balance position of the pneumatic valve is adapted to the balance position of the first connecting part relative to the second connecting part. For example, if the suspension system is a seat suspension system, the first connecting part includes the upper frame of the seat, and the second connecting part includes the lower frame of the seat. Xiao Ming sits on the seat and adjusts the height of the seat to 100mm, under the action of the pneumatic valve, the suspension position range of the seat at this time is (-10mm, +10mm); Xiaohong sits on the seat and adjusts the height of the seat to 80mm. Under the action of the pneumatic valve, At this time, the suspension position range of the seat is still (-10mm, +10mm). It can be seen that the equilibrium position of the first connecting part relative to the second connecting part changes with the change of the positional relationship of the first connecting part relative to the second connecting part. The pneumatic valve makes the first connecting part or the second connecting part in the first The balance position of one connecting part relative to the second connecting part realizes levitation.

It should be noted that when the positional relationship between the first connecting portion and the second connecting portion and the corresponding ratio of the working stroke of the pneumatic valve is 1:1, the equilibrium position of the pneumatic valve is that the first connecting portion is relative to the second connecting portion The balance position of the department.

Example two

FIG. 3 shows a schematic diagram of the functional structure of a system for adjusting the height of a suspension system according to an embodiment of the present invention. As shown in FIG. 3, a system 100 for adjusting the height of a suspension system includes a first connecting portion 110, The second connecting portion 120, at least one pneumatic valve 130 and an air spring 140; the pneumatic valve 130 and the air spring 140 are arranged between the first connecting portion 110 and the second connecting portion 120, and the positions of the pneumatic valve 130 and the air spring 140 are adapted The pneumatic valve in this embodiment is a linear structure, the pneumatic valve includes a drive rod and a valve body, the drive rod makes a reciprocating linear motion in the valve body, the drive rod is connected to the first connecting portion, and the valve body is connected to the second connecting portion . The position adaptation of the pneumatic valve and the air spring includes that the longitudinal axis of the pneumatic valve is parallel or coincides with the longitudinal axis of the air spring, or the longitudinal axis of the pneumatic valve is not parallel or coincides with the longitudinal axis of the air spring. Preferably, the longitudinal axis of the pneumatic valve is parallel to or coincides with the longitudinal axis of the air spring. It should be noted that the position of the pneumatic valve and the air spring is not further limited in this embodiment. As long as the pneumatic valve can collect the movement variable between the first connection part and the second connection part, the air spring can be located between the first connection part and the second connection part. It is sufficient to provide support between the second connections.

It should be noted that if the first connecting part includes the cab, the second connecting part includes the chassis frame, that is, the pneumatic valve and the air spring are arranged between the cab and the chassis frame. If the first connecting portion includes the vehicle chassis, the second connecting portion includes wheels, that is, the pneumatic valve and the air spring are arranged between the vehicle chassis and the wheels. If the first connecting portion includes the upper frame of the seat, the second connecting portion includes the lower frame of the seat, that is, the pneumatic valve and the air spring are arranged between the upper frame of the seat and the lower frame of the seat. If the first connecting part includes the sliding horizontal axis of the seat scissors frame, the second connecting part includes the rotating pin of the seat scissors frame, that is, the pneumatic valve and the air spring are arranged on the sliding horizontal axis and the seat of the seat scissors frame. Between the pivot pins of the chair scissor frame.

The gas output end of the pneumatic valve 130 is connected to the gas input end of the air spring 140; the gas output end of the pneumatic valve is connected to the gas input end of the air spring, so that the pneumatic valve and the air spring generate gas flow connection, thereby realizing the pneumatic valve to control the air spring Inflate or deflate to achieve height adjustment.

The pneumatic valve 130 is used to collect at least one movement variable of the first connection portion 110 relative to the second connection portion 120; for example, the movement variable includes the positional relationship of the first connection portion 110 relative to the second connection portion 120. At the same time, the pneumatic valve 130 changes its working stroke according to the collected motion variable and/or the change of the motion variable, wherein the change of the motion variable is continuous in time through at least two of the first connecting part 110 relative to the second connecting part 120 Motion variables are determined. After the pneumatic valve 130 collects the movement variable between the first connection part 110 and the second connection part 120, or after the pneumatic valve 130 collects the movement variable between the first connection part 110 and the second connection part 120, Or, after the pneumatic valve 130 collects the movement variable between the first connecting portion 110 and the second connecting portion 120 and the change of the movement variable, the working stroke of the pneumatic valve 130 changes, thereby causing the air spring 140 and the air source to generate The gas flow connection realizes the inflation of the air spring 140, or causes the gas flow connection between the air spring 140 and the atmosphere to realize the deflation of the air spring 140 and realize the height adjustment.

2 and 3, the motion variable includes the positional relationship of the first connecting portion 110 relative to the second connecting portion 120; the positional relationship includes a vertical relationship and/or a horizontal relationship; the first connecting portion 110 is relative to the second connecting portion. The positional relationship of the portion 120 is the adjusted target value, and the positional relationship of the first connecting portion 110 relative to the second connecting portion 120 is provided by the total working stroke of the pneumatic valve. Preferably, the positional relationship of the first connecting portion 110 relative to the second connecting portion 120 corresponds to the total working stroke of the pneumatic valve 130 according to a preset ratio, for example, the positional relationship of the first connecting portion 110 relative to the second connecting portion 120 The ratio to the total working stroke of the pneumatic valve 130 is 1:1, 1:2, or 1:3, etc. In this embodiment, the ratio of the positional relationship of the first connecting portion 110 relative to the second connecting portion 120 to the total working stroke of the pneumatic valve 130 is not further limited. The total working stroke is defined by the upper working stroke end S31 and the lower working stroke end S32.

The suspension upper limit position S21 of the pneumatic valve 130 is in the range between the balance position S00 of the total working stroke and the upper working stroke end S31, and the suspension lower limit position S22 of the pneumatic valve 130 is at the equilibrium position S00 of the total working stroke and the lower working stroke end S32. The balance range is a sub-range of the total working stroke range defined by the suspension upper limit position S21 and the suspension lower limit position S22, and the balance range is defined by the balance upper limit position S11 and the balance lower limit position S12. For example, the total working stroke range includes (-15mm, +15mm), the total working stroke range defined by the suspension upper limit position S21 and the suspension lower limit position S22 includes (-10mm, +10mm), and the balance range includes (-5mm, +5mm).

In the first mode, if the positional relationship between the first connecting portion 110 and the second connecting portion 120 is within the balance range (S12, S11), the working stroke of the pneumatic valve 130 does not change. Therefore, the pneumatic valve 130 does not control The air spring 140 is inflated or deflated, and the height of the air spring 140 is a preset basic height. In this case, you can drive on a flat road without adjusting the height of the air spring to maximize comfort.

In the second mode, when the positional relationship between the first connecting portion 110 and the second connecting portion 120 is displaced from the equilibrium upper limit position S11 along the direction of the suspension upper limit position S21, the pneumatic valve 130 follows the preset first gas The flow control air spring 140 is deflated. Since the flow of the first gas is small, the height of the air spring 140 is reduced slightly; or, when the positional relationship of the first connecting portion 110 with respect to the second connecting portion 120 moves from the balance lower limit position S12 In the process of displacement in the direction of the lower suspension limit position S22, the pneumatic valve 130 controls the air spring 140 to inflate according to the preset first gas flow rate. Since the first gas flow rate is small, the height of the air spring 140 increases slightly; The two modes keep the height between the first connecting part and the second connecting part within the balance range, and realize the suspension adjustment, so as to achieve the best comfort.

In the third mode, when the positional relationship between the first connecting portion 110 and the second connecting portion 120 is displaced from the upper limit position S21 of the suspension along the direction of the upper working stroke end S31, the pneumatic valve 130 follows the preset second The gas flow control air spring 140 deflates, wherein the second mass flow is greater than the first mass flow. Because the second gas flow rate is large, the air spring is quickly exhausted, so that the height of the air spring is quickly reduced; or, the positional relationship of the first connecting portion 110 relative to the second connecting portion 120 is along the lower limit position S22 from the suspension lower limit position S22. During the process of displacement in the direction of the working stroke end S32, the pneumatic valve 130 controls the air spring to inflate according to the preset second air flow rate. Because the second air flow rate is large, the air spring is quickly inflated, so that the height of the air spring rises quickly. high. The third mode realizes the rapid charging and discharging of the air spring, reduces the vibration amplitude, and reduces the discomfort caused by the severely bumpy road.

In some embodiments of the present invention, the system 100 for adjusting the height of the suspension system further includes an adjusting device 150, which is used to control the working stroke of the pneumatic valve 130 to shorten, extend or remain unchanged, thereby controlling the inflation of the air spring 140 , Deflate or neither inflate nor deflate, realize the gear and memory adjustment of the positional relationship of the first connecting portion 110 relative to the second connecting portion 120. For example, the adjusting device 150 may include the following three types. The first type of adjusting device 150 includes an adjusting handle and a cable. The adjusting handle is connected to the pneumatic valve 130 through a cable. Specifically, the adjusting handle changes the pneumatic valve 130 by controlling the length of the cable. The working stroke of the air spring 140 is controlled to control the inflation or deflation of the air spring 140 to realize the gear adjustment of the height of the air spring 140, thereby realizing the gear adjustment of the positional relationship of the first connecting portion 110 with respect to the second connecting portion 120; at the same time, through the adjustment handle The length of the cable is fixed so that the working stroke of the pneumatic valve 130 remains unchanged, so that the air spring 140 is neither inflated nor deflated, so that the memory adjustment of the height of the air spring 140 is realized, so that the first connecting portion 110 is relative to the first connecting portion 110. The memory adjustment of the positional relationship of the two connecting parts 120; in addition, once the length of the cable is fixed, as described above, the pneumatic valve 130 is used to realize the suspension adjustment at a specific position to improve the comfort. The second type of adjusting device 150 includes a motor drive device, which is connected to the pneumatic valve 130 through a cable. Specifically, the motor drive device controls the length of the cable to change the working stroke of the pneumatic valve 130, thereby controlling the air spring 140 Inflate or deflate to realize the height adjustment of the air spring 140, so as to realize the position adjustment of the position relationship between the first connecting portion 110 and the second connecting portion 120; at the same time, the length of the cable is fixed by the motor drive device, so that The working stroke of the pneumatic valve 130 remains unchanged, so that the air spring 140 is neither inflated nor deflated, and memory adjustment of the height of the air spring 140 is realized, thereby realizing the positional relationship between the first connecting portion 110 and the second connecting portion 120. Memory adjustment; In addition, once the length of the cable is fixed, as described above, the pneumatic valve 130 is used to achieve suspension adjustment at a specific position to improve comfort. The third type of adjusting device 150 includes a motor drive device. The motor drive device is directly connected to the pneumatic valve 130. The motor drive device directly changes the working stroke of the pneumatic valve 130 or fixes it at a specific position, thereby controlling the air spring 140 to inflate, deflate or both The air spring 140 is not inflated or deflated, so that the height of the air spring 140 is raised, lowered, or fixed at a specific position to realize the gear and memory adjustment of the height of the air spring 140, thereby realizing the adjustment of the first connecting portion 110 relative to the second connecting portion 120 The gear and memory adjustment of the position relationship; in addition, the pneumatic valve 130 realizes the suspension adjustment at a specific position, which improves the comfort. For example, when the length of the cable becomes longer, the working stroke of the pneumatic valve becomes shorter and controls the air spring to inflate; when the length of the cable becomes shorter, the working stroke of the pneumatic valve becomes longer and the air spring is controlled to deflate. The length of the cable and the working stroke of the pneumatic valve are not further limited. The user can adjust the positional relationship between the first connecting portion and the second connecting portion through the adjusting device according to actual needs, so as to meet the needs of different users.

Further, the balance position between the first connecting portion 110 and the second connecting portion 120 changes following the change of the positional relationship of the first connecting portion 110 with respect to the second connecting portion 120, and the pneumatic valve 130 is used to make the first connection The part 110 or the second connecting part 120 is suspended at the equilibrium position of the first connecting part 110 relative to the second connecting part 120. Specifically, when the adjusting device 150 adjusts the positional relationship between the first connecting portion 110 relative to the second connecting portion 120 to a specific position through the pneumatic valve 130, the working stroke of the pneumatic valve 130 is shortened or extended while the pneumatic valve 130 is constantly changing. Return, so that the balance position of the pneumatic valve 130 does not change relative to itself, but the balance position of the pneumatic valve 130 is constantly changing relative to the first connecting portion 110 or the second connecting portion 120, so that the first connecting portion 110 is relatively As the equilibrium position of the second connecting portion 120 changes continuously, the equilibrium position of the pneumatic valve 130 is adapted to the equilibrium position of the first connecting portion 110 relative to the second connecting portion 120. For example, if the suspension system is a seat suspension system, the first connecting portion 110 includes the upper frame of the seat, and the second connecting portion 120 includes the lower frame of the seat. Adjust to 100mm. Under the action of pneumatic valve 130, the suspension position range of the seat is (-10mm, +10mm); Xiaohong sits on the seat and adjusts the height of the seat to 80mm. Under the action of, the suspension position range of the seat is still (-10mm, +10mm) at this time. It can be seen that the equilibrium position of the first connecting portion 110 relative to the second connecting portion 120 changes following the change in the positional relationship of the first connecting portion 110 relative to the second connecting portion 120, and the pneumatic valve 130 makes the first connecting portion 110 or The second connecting portion 120 achieves levitation at the equilibrium position of the first connecting portion 110 relative to the second connecting portion 120.

It should be noted that when the ratio of the positional relationship between the first connecting portion 110 and the second connecting portion 120 to the working stroke of the pneumatic valve is 1:1, the equilibrium position of the pneumatic valve is that the first connecting portion 110 is relative to The equilibrium position of the second connecting portion 120.

It should be noted that the system for adjusting the height of the suspension system can be applied to the field of seat suspension systems, vehicle chassis suspension systems, and cab suspension systems. This embodiment does not apply to the application fields of the system for adjusting the height of the suspension system. Further restrictions.

In summary, the technical solution of this embodiment collects at least one movement variable of the first connecting portion relative to the second connecting portion through a pneumatic valve, and changes its working stroke according to the collected movement variable and/or the change of the movement variable. , So that the air spring is inflated or deflated to achieve height adjustment. Compared with the prior art that uses electronic control to adjust the height of the suspension system, the technical solution of this embodiment improves the sensitivity of height adjustment. In addition, compared with the prior art that uses a complex mechanical structure to adjust the height of the suspension system, the pneumatic valve of the technical solution of this embodiment can collect and control the positional relationship by changing its own working stroke. The structure is simple and convenient. Installation and maintenance are low cost.

Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, It is still possible to modify the technical solutions described in the foregoing embodiments, or to equivalently replace some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are all included in the protection scope of the present invention.

Claims

A method for adjusting the height of a suspension system, characterized in that the method includes:

Arrange a pneumatic valve and an air spring between the first connecting part and the second connecting part, the positions of the pneumatic valve and the air spring are adapted; and the gas output end of the pneumatic valve and the gas input of the air spring End connection

The pneumatic valve collects at least one movement variable of the first connecting portion relative to the second connecting portion;

At the same time, the pneumatic valve changes its working stroke according to the collected motion variable and/or the change of the motion variable, so that the air spring is connected with the air source to generate a gas flow connection, and the air spring is inflated; or , So that a gas flow connection is generated between the air spring and the atmosphere, the air spring is deflated, and the height adjustment is realized.
The method for adjusting the height of a suspension system according to claim 1, wherein the motion variable includes a positional relationship of the first connecting portion with respect to the second connecting portion; the positional relationship includes a vertical relationship And/or horizontal relationship;

The positional relationship of the first connecting portion with respect to the second connecting portion is a target value for adjustment, and the positional relationship of the first connecting portion with respect to the second connecting portion is provided by the total working stroke of the pneumatic valve , The total working stroke is defined by the upper working stroke end and the lower working stroke end;

The upper limit position of the suspension of the pneumatic valve is in the range between the equilibrium position of the total working stroke and the end of the upper working stroke, and the lower limit position of the suspension of the pneumatic valve is in the equilibrium position of the overall working stroke and the end of the upper working stroke. Within the range between the ends of the lower working stroke;

The balance range is a sub-range of the total working stroke range defined by the upper limit position of the suspension and the lower limit position of the suspension, and the range of balance is defined by the upper limit position of the balance and the lower limit position of the balance.
The method for adjusting the height of a suspension system according to claim 2, wherein if the positional relationship of the first connecting portion with respect to the second connecting portion is within the balance range, the pneumatic valve does not Controlling the inflation or deflation of the air spring, and the height of the air spring is a preset basic height;

During the process in which the positional relationship of the first connecting portion with respect to the second connecting portion is displaced from the upper limit of equilibrium position along the direction of the upper limit of suspension, the pneumatic valve follows the preset first gas The flow rate controls the air spring to deflate, and the height of the air spring is reduced; or, when the positional relationship of the first connecting portion with respect to the second connecting portion moves from the lower balance position

During the process of displacement in the direction of the lower limit position of the suspension, the pneumatic valve controls the air spring to inflate according to the first gas flow rate, and the height of the air spring increases;

During the process in which the positional relationship of the first connecting portion with respect to the second connecting portion is displaced from the upper limit position of the suspension along the direction of the upper working stroke end, the pneumatic valve follows a preset second gas The flow rate controls the air spring to deflate, and the height of the air spring is reduced; or, when the positional relationship of the first connecting portion with respect to the second connecting portion moves from the lower limit position of the suspension along the lower working stroke During the process of displacement in the direction of the end, the pneumatic valve controls the air spring to inflate according to the second gas flow rate, and the height of the air spring increases;

Wherein, the second gas flow rate is greater than the first gas flow rate.
The method for adjusting the height of a suspension system according to claim 1, wherein the method further comprises:

The working stroke of the pneumatic valve is shortened, extended or kept unchanged by the adjusting device, so as to control the air spring to inflate, deflate, or neither inflate nor deflate, so that the first connecting portion is relative to the first The gear and memory adjustment of the positional relationship of the two connecting parts.
The method for adjusting the height of a suspension system according to claim 4, wherein the equilibrium position of the first connecting part relative to the second connecting part follows the first connecting part relative to the second connecting part. The positional relationship of the connecting portion changes, and the pneumatic valve makes the first connecting portion or the second connecting portion float at the equilibrium position of the first connecting portion relative to the second connecting portion.
A system for adjusting the height of a suspension system, characterized in that the system includes a first connecting part, a second connecting part, at least one pneumatic valve and an air spring;

The pneumatic valve and the air spring are arranged between the first connecting portion and the second connecting portion, and the positions of the pneumatic valve and the air spring are adapted;

The gas output end of the pneumatic valve is connected to the gas input end of the air spring;

The pneumatic valve is used to collect at least one movement variable of the first connecting portion relative to the second connecting portion; at the same time, change its work according to the collected movement variable and/or the change of the movement variable Stroke, so that the air spring is connected with the air source to achieve gas flow connection, and the air spring is inflated; or, the air spring is connected to the atmosphere to achieve the air spring deflation and height adjustment .
The system for adjusting the height of a suspension system according to claim 6, wherein the motion variable includes a positional relationship of the first connecting portion with respect to the second connecting portion; the positional relationship includes a vertical relationship And/or horizontal relationship;

The positional relationship of the first connecting portion with respect to the second connecting portion is a target value for adjustment, and the positional relationship of the first connecting portion with respect to the second connecting portion is provided by the total working stroke of the pneumatic valve , The total working stroke is defined by the upper working stroke end and the lower working stroke end;

The upper limit position of the suspension of the pneumatic valve is in the range between the equilibrium position of the total working stroke and the end of the upper working stroke, and the lower limit position of the suspension of the pneumatic valve is in the equilibrium position of the overall working stroke and the end of the upper working stroke. Within the range between the ends of the lower working stroke;

The balance range is a sub-range of the total working stroke range defined by the suspension upper limit position and the suspension lower limit position, and the balance range is defined by the balance upper limit position and the balance lower limit position.
The system for adjusting the height of a suspension system according to claim 7, wherein if the positional relationship of the first connecting portion with respect to the second connecting portion is within the balance range, the pneumatic valve: Used for not controlling the inflation or deflation of the air spring, and the height of the air spring is a preset basic height;

During the process in which the positional relationship of the first connecting portion with respect to the second connecting portion is displaced from the upper limit of equilibrium position along the direction of the upper limit of suspension, the pneumatic valve is used to follow a preset The first gas flow controls the deflation of the air spring, and the height of the air spring is reduced; or, when the positional relationship of the first connecting portion with respect to the second connecting portion is along the lower limit position of the equilibrium, During the process of displacement in the direction of the lower limit position of the suspension, the pneumatic valve is used to control the inflation of the air spring according to a preset first gas flow rate, and the height of the air spring is increased;

During the process in which the positional relationship of the first connecting portion relative to the second connecting portion is displaced from the upper limit position of the suspension along the direction of the upper working stroke end, the pneumatic valve is used to follow a preset The second gas flow controls the deflation of the air spring, and the height of the air spring is reduced; or, when the positional relationship of the first connecting portion with respect to the second connecting portion moves from the lower limit position of the suspension along the During the process of displacement in the direction of the lower working stroke end, the pneumatic valve is used to control the inflation of the air spring according to a preset second air flow rate, and the height of the air spring is increased;

Wherein, the second gas flow rate is greater than the first gas flow rate.
The system for adjusting the height of a suspension system according to claim 6, wherein the system further comprises an adjusting device, and the adjusting device is used to control the working stroke of the pneumatic valve to shorten, extend or remain unchanged, Therefore, the air spring is controlled to inflate, deflate, or neither inflate nor deflate, so as to realize the gear and memory adjustment of the positional relationship of the first connecting portion relative to the second connecting portion.
The system for adjusting the height of a suspension system according to claim 9, wherein the equilibrium position of the first connecting part relative to the second connecting part follows the first connecting part relative to the second connecting part. The positional relationship of the part changes, and the pneumatic valve makes the first connection part or the second connection part float at the equilibrium position of the first connection part relative to the second connection part.