Air suspension one-key control lifting system of semitrailer

Abstract

A semitrailer air suspension one-key control lifting system comprises a lifting switch, an ECU, an air source interface, an air storage tank, a two-channel electromagnetic valve, a height sensor and two air bag sets, the lifting switch is installed in a tractor cab and is in signal connection with the ECU through an integrated wire harness, the ECU is in signal connection with the two-channel electromagnetic valve and the height sensor through signal wire harnesses, and the two air bag sets are connected with the air source interface. The height sensor is arranged on a semitrailer body, the air source connector, the air storage tank and an air inlet channel port of the two-channel electromagnetic valve are sequentially connected in series through a main air pipeline, the air source connector is connected with an air source of the semitrailer, and a public port of the two-channel electromagnetic valve is connected with the two air bag sets. The two air bag sets are arranged on the front axle, the middle axle and the rear axle respectively in a bilateral symmetry mode, and exhaust channel ports of the two-channel electromagnetic valves are communicated with the outside atmosphere. The air suspension lifting control device is scientific in design, reasonable in structure and easy to operate and control, can control air suspension lifting of the semitrailer through one key, and facilitates control over the height of a semitrailer body.

Description

Technical Field

[0001] The utility model relates to the technical field of semi-trailers, and in particular to a one-button control lifting system for air suspension of a semi-trailer. Background Art

[0002] The air suspension system is a new product that has developed rapidly in recent years. It is produced and installed in a modular manner, is easy to maintain and replace, has a strong load-bearing capacity, and has good shock absorption performance. It can effectively reduce the impact of the road on the vehicle body, effectively extend the service life of the vehicle, ensure the safety of the goods, and protect and extend the service life of the road surface, reduce noise pollution to the environment, etc. It has become the dominant technology for heavy-duty trucks and is widely used in the field of semi-trailer manufacturing.

[0003] When loading or unloading a semi-trailer, it is inconvenient because the height of the loading and unloading platform is different from the height of the semi-trailer body. In addition, the semi-trailer will pass through some height-restricted sections during driving, which will restrict the semi-trailer. Furthermore, when the semi-trailer is driving on a section with poor road conditions, the impact of the road on the body will increase.

[0004] However, there is currently no system that can control the lifting and lowering of the semi-trailer's air suspension with one button in the tractor cab in order to control the height of the semi-trailer body.

[0005] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0006] The purpose of the utility model is to address the deficiencies of the prior art and thus provide a one-key control lifting system for the air suspension of a semitrailer. The utility model has a scientific design, a reasonable structure, and simple operation. It can control the lifting of the air suspension of the semitrailer with one key, and conveniently control the height of the semitrailer body.

[0007] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is: a one-button control lifting system of the semi-trailer air suspension, including a lifting switch, an ECU, an air source interface, an air storage tank, a two-channel solenoid valve, a height sensor and two groups of airbag groups, the lifting switch is installed in the tractor cab, the lifting switch is connected to the ECU signal through an integrated wiring harness, the ECU is respectively connected to the two-channel solenoid valve and the height sensor signal through the signal wiring harness, the height sensor is arranged on the semi-trailer body, the air source interface, the air storage tank and the air intake channel ports of the two-channel solenoid valve are connected in series in sequence through the main air pipeline, the air source interface is connected to the air source of the semi-trailer, the common port of the two-channel solenoid valve is connected to the two groups of airbag groups respectively, the two groups of airbag groups are symmetrically arranged on the front axle, the middle axle and the rear axle, and the exhaust channel port of the two-channel solenoid valve is connected to the outside atmosphere.

[0008] Based on the above, an overflow valve is provided on the main gas pipeline between the gas source interface and the gas storage tank.

[0009] Based on the above, a filter is provided on the main air pipeline between the air storage tank and the air inlet channel port of the two-channel solenoid valve.

[0010] Based on the above, both groups of airbags include three airbags spaced front and rear; the three airbags on the left are respectively arranged on the left sides of the front axle, the middle axle and the rear axle, and the three airbags on the right are respectively arranged on the right sides of the front axle, the middle axle and the rear axle, and the common port of the two-channel solenoid valve is connected to a three-way air pipe joint through a ventilation pipe, and the other two ports of the three-way air pipe joint are respectively connected to an air distribution pipe, one of which is connected in parallel with the three airbags on the left, and the other is connected in parallel with the three airbags on the right.

[0011] Based on the above, a main hanging circuit quick connector is provided on the integrated wiring harness between the lifting switch and the ECU. The utility model has substantial characteristics and progress compared to the prior art. Specifically, the working principle of the utility model is as follows: Under normal circumstances, the two-channel solenoid valve is not energized, and the air intake and exhaust channels of the two-channel solenoid valve are closed. When the height of the semi-trailer vehicle needs to be adjusted, the driver presses the up or down button of the lifting switch in the cab. The up or down button of the lifting switch transmits the lifting signal to the ECU through the integrated wiring harness. The ECU receives the lifting signal and transmits it to the two-channel solenoid valve. The two-channel solenoid valve starts to execute the relevant command, and the air intake channel or exhaust channel of the two-channel solenoid valve is closed. When the electromagnetic coil at the channel is energized, the intake channel or exhaust channel of the two-channel solenoid valve is opened; when the intake channel of the two-channel solenoid valve is opened, the intake channel of the two-channel solenoid valve is connected to the common port, and the air source interface receives air from the air source of the semi-trailer. The compressed gas passes through the main air pipeline and passes through the overflow valve, the air tank, the filter and the intake channel of the two-channel solenoid valve in turn, and then flows out from the common port of the two-channel solenoid valve. The compressed gas is then filled into each airbag at the same time through the ventilation pipeline, the three-way ventilation pipe joint and the two gas distribution pipelines, so that each airbag rises at the same time, lifting the semi-trailer body to a high height. The sensor monitors the height of the semi-trailer body in real time and transmits the signal to the ECU. The ECU has preset maximum and minimum height values. When the height sensor detects that the height of the semi-trailer body has reached the maximum height value, the ECU controls the electromagnetic coil of the intake channel of the two-channel solenoid valve to cut off the power, so that the intake channel of the two-channel solenoid valve is closed, and the semi-trailer body is lifted; similarly, when the exhaust channel of the two-channel solenoid valve is opened, the exhaust channel of the two-channel solenoid valve is connected to the common port, and each airbag is connected through the corresponding air distribution pipeline, the three-way air pipe joint, the common port of the two-channel solenoid valve and the exhaust port. The air channel is connected to the outside atmosphere, and each airbag deflates outward at the same time, so that each airbag descends at the same time, and the semi-trailer body descends. The height sensor monitors the height of the semi-trailer body in real time and transmits the signal to the ECU. When the height sensor detects that the height of the semi-trailer body reaches the minimum height, the ECU controls the electromagnetic coil of the exhaust channel of the two-channel solenoid valve to cut off the power, so that the exhaust channel of the two-channel solenoid valve is closed, and the semi-trailer body is lowered. Then, through the above operation, the semi-trailer air suspension lifting and lowering can be controlled in the tractor cab with one button to control the height of the semi-trailer body. Then, when the semi-trailer is loading and unloading, the height of the semi-trailer body can be adjusted to be consistent with the height of the loading platform, which is convenient for loading and unloading. Moreover, when the semi-trailer encounters a height-restricted section during driving, the driver can press the descending button of the lifting switch, thereby deflating each airbag, lowering the air suspension, and lowering the height of the semi-trailer body, so as to pass the height-restricted section and avoid the semi-trailer being restricted by the height limit.When the semi-trailer is driving on a road with bad road conditions, at this time, you can press the up button of the lifting switch, and then inflate each airbag to make the air suspension rise. The height of the semi-trailer body rises, which can increase the rebound of the airbag and reduce the impact of the road on the body. It has a scientific design, reasonable structure, and simple operation. It can control the lifting and lowering of the semi-trailer air suspension with one button, which is convenient for controlling the height of the semi-trailer body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the principle structure of the utility model.

[0013] In the figure: 1. Lifting switch; 2. Main hanging circuit quick connector; 3. ECU; 4. Air source interface; 5. Overflow valve; 6. Air tank; 7. Filter; 8. Two-channel solenoid valve; 9. Height sensor; 10. Airbag; 11. Air distribution pipeline; 12. Signal wiring harness; 13. Three-way air pipe connector; 14. Integrated wiring harness; 15. Main air pipeline. DETAILED DESCRIPTION

[0014] The technical solution of the utility model is further described in detail below through specific implementation methods.

[0015] like Figure 1 As shown, the one-button control lifting system of the semi-trailer air suspension includes a lifting switch 1, an ECU3, an air source interface 4, an air storage tank 6, a two-channel solenoid valve 8, a height sensor 9 and two groups of airbag groups. The lifting switch 1 is installed in the cab of the tractor. The lifting switch 1 is connected to the ECU3 signal through an integrated wiring harness 14. The ECU3 is respectively connected to the two-channel solenoid valve 8 and the height sensor 9 signal through a signal wiring harness 12. The height sensor 9 is arranged on the semi-trailer body. The air source interface 4, the air storage tank 6 and the air intake channel ports of the two-channel solenoid valve 8 are connected in series in sequence through a main air pipeline 15. The air source interface 4 is connected to the air source of the semi-trailer. The common port of the two-channel solenoid valve 8 is connected to the two groups of airbag groups respectively. The two groups of airbag groups are symmetrically arranged on the front axle, the middle axle and the rear axle respectively. The exhaust channel port of the two-channel solenoid valve 8 is connected to the outside atmosphere.

[0016] An overflow valve 5 is provided on the main gas pipeline 15 between the gas source interface 4 and the gas storage tank 6 .

[0017] A filter 7 is provided on the main air pipeline 15 between the air storage tank 6 and the air inlet channel port of the two-channel solenoid valve 8 .

[0018] Both groups of airbags include three airbags 10 spaced front to back; the three airbags 10 on the left are respectively arranged on the left sides of the front axle, the middle axle and the rear axle, and the three airbags 10 on the right are respectively arranged on the right sides of the front axle, the middle axle and the rear axle, and the common port of the two-channel solenoid valve 8 is connected to a three-way air pipe joint 13 through a ventilation pipe, and the other two ports of the three-way air pipe joint 13 are respectively connected to an air distribution pipe 11, one of the air distribution pipes 11 is respectively connected in parallel with the three airbags 10 on the left, and the other air distribution pipe 11 is respectively connected in parallel with the three airbags 10 on the right.

[0019] A main hanging circuit quick connector 2 is provided on the integrated wiring harness 14 between the lifting switch 1 and the ECU 3 .

[0020] Lifting switch 1, ECU 3, air source interface 4, air tank 6, two-channel solenoid valve 8, height sensor 9, integrated wiring harness 14, signal wiring harness 12, overflow valve 5, filter 7, airbag 10 and main hanging circuit quick connector 2 are all existing conventional components, which can be purchased on the market, and the specific structure and working principle are not repeated. The two-channel solenoid valve 8 is a valve body with two channels and a common interface. Both channels are equipped with solenoid valves for on and off, which is equivalent to the two branches on the three-way pipe being equipped with solenoid valves respectively, and the solenoid valve assembly integrating two ordinary solenoid valves is a conventional design.

[0021] The working principle of the utility model is as follows: under normal conditions, the two-channel solenoid valve 8 is not energized, and the air intake channel and the exhaust channel of the two-channel solenoid valve 8 are both closed. When the height of the semi-trailer vehicle needs to be adjusted, the driver presses the up or down button of the lifting switch 1 in the cab, and the up or down button of the lifting switch 1 transmits the lifting signal to the ECU 3 through the integrated wiring harness 14. The ECU 3 receives the lifting signal and transmits it to the two-channel solenoid valve 8. The two-channel solenoid valve 8 starts to execute the relevant command, and the electromagnetic coil at the air intake channel or the exhaust channel of the two-channel solenoid valve 8 is energized, then the air intake channel of the two-channel solenoid valve 8 is closed. When the air inlet channel of the two-channel solenoid valve 8 is opened, the air inlet channel of the two-channel solenoid valve 8 is connected with the common port, the air source interface 4 receives air from the air source of the semi-trailer, and the compressed gas passes through the main air pipeline 15 in sequence through the overflow valve 5, the air storage tank 6, the filter 7 and the air inlet channel of the two-channel solenoid valve 8, and then flows out from the common port of the two-channel solenoid valve 8. The compressed gas then passes through the ventilation pipeline, the three-way ventilation pipe joint 13 and the two gas distribution pipelines 11 to fill each airbag 10 at the same time, so that each airbag 10 is raised at the same time, the semi-trailer body is lifted, and the height sensor 9 monitors the semi-trailer in real time. When the height sensor 9 detects that the height of the semi-trailer body reaches the maximum value, the ECU3 controls the electromagnetic coil of the air intake channel of the two-channel solenoid valve 8 to be de-energized, so that the air intake channel of the two-channel solenoid valve 8 is closed, thereby realizing the lifting of the semi-trailer body; similarly, when the exhaust channel of the two-channel solenoid valve 8 is opened, the exhaust channel of the two-channel solenoid valve 8 is connected with the common port, and each airbag 10 is connected with the common port through the corresponding air distribution pipeline 11, the three-way air pipe joint 13, the common port of the two-channel solenoid valve 8 and the exhaust channel The airbags 10 are connected to the outside atmosphere, and each airbag 10 is deflated outward at the same time, so that each airbag 10 is lowered at the same time, and the semi-trailer body is lowered. The height sensor 9 monitors the height of the semi-trailer body in real time and transmits the signal to the ECU 3. When the height sensor 9 detects that the height of the semi-trailer body reaches the minimum height value, the ECU 3 controls the electromagnetic coil of the exhaust channel of the two-channel electromagnetic valve 8 to cut off the power, so that the exhaust channel of the two-channel electromagnetic valve 8 is closed, and the semi-trailer body is lowered. Then, through the above operation, the semi-trailer air suspension lifting and lowering can be controlled in the tractor cab with one key, and the height of the semi-trailer body can be controlled. Then, when the semi-trailer is loading and unloading, the height of the semi-trailer body can be adjusted to be consistent with the height of the loading platform, which is convenient for loading and unloading. Moreover, when the semi-trailer encounters a height-restricted section during driving, the driver can press the descending button of the lifting switch 1, so that each airbag 10 is deflated, the air suspension is lowered, and the height of the semi-trailer body is lowered, so as to pass through the height-restricted section and avoid the semi-trailer being restricted by the height restriction.When the semi-trailer is traveling on a road section with bad road conditions, at this time, the rising button of the lifting switch 1 can be pressed, and then each airbag 10 can be inflated to make the air suspension rise, and the height of the semi-trailer body rises, which can increase the rebound of the airbag 10 and reduce the impact of the road surface on the body. The design is scientific, the structure is reasonable, and the operation is simple. The lifting and lowering of the semi-trailer air suspension can be controlled by one button, which is convenient for controlling the height of the semi-trailer body.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. One-button control lifting system for semi-trailer air suspension, characterized by: It includes a lifting switch, an ECU, an air source interface, an air storage tank, a two-channel solenoid valve, a height sensor and two groups of airbag groups. The lifting switch is installed in the cab of the tractor. The lifting switch is connected to the ECU signal through an integrated wiring harness. The ECU is respectively connected to the two-channel solenoid valve and the height sensor signal through the signal harness. The height sensor is arranged on the semi-trailer body. The air source interface, the air storage tank and the air intake channel ports of the two-channel solenoid valve are connected in series in sequence through the main air pipeline. The air source interface is connected to the air source of the semi-trailer. The common port of the two-channel solenoid valve is connected to the two groups of airbag groups respectively. The two groups of airbag groups are symmetrically arranged on the front axle, the middle axle and the rear axle respectively. The exhaust channel port of the two-channel solenoid valve is connected to the outside atmosphere.

2. The one-button control lifting system for semitrailer air suspension according to claim 1 is characterized in that: An overflow valve is provided on the main gas pipeline between the gas source interface and the gas storage tank.

3. The one-button control lifting system for semitrailer air suspension according to claim 1 is characterized in that: A filter is arranged on the main air pipeline between the air storage tank and the air inlet channel port of the two-channel solenoid valve.

4. The one-button control lifting system for semitrailer air suspension according to claim 1 is characterized in that: Both groups of airbags include three airbags spaced front and rear; the three airbags on the left are respectively arranged on the left sides of the front axle, the middle axle and the rear axle, and the three airbags on the right are respectively arranged on the right sides of the front axle, the middle axle and the rear axle, and the common port of the two-channel solenoid valve is connected to a three-way air pipe joint through a ventilation pipe, and the other two ports of the three-way air pipe joint are respectively connected to an air distribution pipe, one of which is connected in parallel with the three airbags on the left, and the other is connected in parallel with the three airbags on the right.

5. The one-button control lifting system for semitrailer air suspension according to any one of claims 1 to 4, characterized in that: A main hanging circuit quick connector is provided on the integrated wiring harness between the lifting switch and the ECU.

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