Commercial vehicle cab height adjusting system

Abstract

The invention relates to a commercial vehicle cab height adjusting system which comprises an inflation and deflation unit and a height adjusting switch arranged in a cab, the height adjusting switch is connected with a cab air bag through the inflation and deflation unit, and when the height of the cab needs to be decreased or increased, the height adjusting switch is pressed down to adjust the height of the cab air bag. The air bag of the cab is inflated / deflated through the inflation / deflation unit, so that the height of the cab is increased or decreased; according to the invention, an existing gas circuit structure does not need to be reformed, so that the improvement difficulty is greatly reduced, and the gas circuit structure is more convenient to realize and operate in actual use; the system has the advantages of quick response, simplicity in operation and convenience and reliability in installation.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and in particular to a height adjustment system for a commercial vehicle cab. Background Technology

[0002] With the development of the transportation industry and rapid urbanization, height restriction barriers, culvert height restrictions, and bridge height restrictions are ubiquitous on roads to ensure road safety and smooth traffic flow. Currently, commercial vehicle cabs have fixed heights, and vehicles with cabs exceeding these height restrictions cannot pass through. This forces drivers to detour several kilometers or even tens of kilometers, severely impacting the timeliness of logistics. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a height adjustment system for commercial vehicle cabs.

[0004] This invention is achieved using the following technical solution:

[0005] A commercial vehicle cab height adjustment system includes: an inflation / deflation unit and a height adjustment switch disposed in the cab. The height adjustment switch is connected to the cab airbag through the inflation / deflation unit. When it is necessary to lower or raise the cab height, the height adjustment switch is pressed, and the cab airbag is inflated / deflated through the inflation / deflation unit to raise or lower the cab height.

[0006] Furthermore, the inflation / deflation unit includes a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a front height adjustment valve, a left rear height adjustment valve, and a right rear height adjustment valve. The first solenoid valve is connected to the front height adjustment valve, the left rear height adjustment valve, and the right rear height adjustment valve via a three-way valve. The front height adjustment valve is connected to the fourth solenoid valve, the left front airbag, and the right front airbag via a three-way valve. The left rear height adjustment valve is connected to the left rear airbag and the second solenoid valve via a three-way valve. The right rear height adjustment valve is connected to the right rear airbag and the third solenoid valve via a three-way valve.

[0007] Furthermore, when the cab height needs to be lowered, pressing the height adjustment switch closes the first solenoid valve. At this time, there is no gas supply to the left front airbag, right front airbag, left rear airbag, and right rear airbag. The second, third, and fourth solenoid valves open, releasing some of the gas from the left front airbag, right front airbag, left rear airbag, and right rear airbag, thus lowering the cab height. Then, the second, third, and fourth solenoid valves close to prevent leakage of the remaining gas in the left front airbag, right front airbag, left rear airbag, and right rear airbag. When the cab height needs to be raised, pressing the height adjustment switch opens the first solenoid valve, and gas flows through the front height adjustment valve, left rear height adjustment valve, and right rear height adjustment valve to inflate the left front airbag, right front airbag, left rear airbag, and right rear airbag. When the gas in the left front airbag, right front airbag, left rear airbag, and right rear airbag reaches the set threshold of the front height adjustment valve, left rear height adjustment valve, and right rear height adjustment valve, inflation stops, thus raising the cab height.

[0008] Furthermore, the height adjustment switch is equipped with a working indicator light and a backlight indicator light.

[0009] Furthermore, the first solenoid valve is a normally open solenoid valve; the second, third, and fourth solenoid valves are normally closed solenoid valves.

[0010] Compared with the prior art, the present invention has the following beneficial technical effects:

[0011] This invention can be improved on the existing basis without restructuring the existing air circuit structure, which greatly reduces the difficulty of improvement and makes it easier to implement and operate in actual use; the four solenoid valves control the front and rear airbags of the cab respectively, the system responds quickly, is simple to operate, and is convenient and reliable to install. Attached Figure Description

[0012] Figure 1 This is a flowchart of the present invention;

[0013] Figure 2 This is a gas path diagram of the gas charging / discharging unit of the present invention.

[0014] Attached image captions:

[0015] 1. First solenoid valve; 2. Second solenoid valve; 3. Third solenoid valve; 4. Fourth solenoid valve; 5. Front height adjustment valve; 6. Left rear height adjustment valve; 7. Right rear height adjustment valve; 8. Left front airbag; 9. Right front airbag; 10. Left rear airbag; 11. Right rear airbag. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0017] A commercial vehicle cab height adjustment system includes: an inflation / deflation unit and a height adjustment switch disposed in the cab. The height adjustment switch is connected to the cab airbag through the inflation / deflation unit. When it is necessary to lower or raise the cab height, the height adjustment switch is pressed, and the cab airbag is inflated / deflated through the inflation / deflation unit to raise or lower the cab height.

[0018] The inflation / deflation unit includes a first solenoid valve 1, a second solenoid valve 2, a third solenoid valve 3, a fourth solenoid valve 4, a front height adjustment valve 5, a left rear height adjustment valve 6, and a right rear height adjustment valve 7. The first solenoid valve 1 is connected to the front height adjustment valve 5, the left rear height adjustment valve 6, and the right rear height adjustment valve 7 via a tee. The front height adjustment valve 5 is connected to the fourth solenoid valve 4, the left front airbag 8, and the right front airbag 9 via a tee. The left rear height adjustment valve 6 is connected to the left rear airbag 10 and the second solenoid valve 2 via a tee. The right rear height adjustment valve 7 is connected to the right rear airbag 11 and the third solenoid valve 3 via a tee.

[0019] When the cab height needs to be lowered, pressing the height adjustment switch closes the first solenoid valve 1. At this time, there is no air supply to the left front airbag 8, right front airbag 9, left rear airbag 10, and right rear airbag 11. The second solenoid valve 2, third solenoid valve 3, and fourth solenoid valve 4 open, releasing some air from the left front airbag 8, right front airbag 9, left rear airbag 10, and right rear airbag 11, thus lowering the cab height. Then, the second solenoid valve 2, third solenoid valve 3, and fourth solenoid valve 4 close, preventing the left front airbag 8, right front airbag 9, left rear airbag 10, and right rear airbag 11 from being lowered. Leakage of residual gas in rear airbag 11; When the cab height needs to be raised, press the height adjustment switch, the first solenoid valve 1 opens, and gas is injected into the left front airbag 8, right front airbag 9, left rear airbag 10, and right rear airbag 11 through the front height adjustment valve 5, left rear height adjustment valve 6, and right rear height adjustment valve 7. When the gas in the left front airbag 8, right front airbag 9, left rear airbag 10, and right rear airbag 11 reaches the set threshold of the front height adjustment valve 5, left rear height adjustment valve 6, and right rear height adjustment valve 7, inflation stops, thereby raising the cab height.

[0020] The height adjustment switch is equipped with a working indicator light and a backlight indicator light.

[0021] The height adjustment switch is equipped with a working indicator light to provide visual cues to the driver when raising or lowering the cab height, and a backlit indicator light to help the driver quickly locate the height adjustment switch at night or in low-light conditions.

[0022] The first solenoid valve 1 is a normally open solenoid valve; the second solenoid valve 2, the third solenoid valve 3, and the fourth solenoid valve 4 are normally closed solenoid valves.

Claims

1. A commercial vehicle cab height adjustment system, characterized in that, include: The system includes an inflation / deflation unit and a height adjustment switch located in the cab. The height adjustment switch is connected to the cab airbag via the inflation / deflation unit. When it is necessary to lower or raise the cab height, the height adjustment switch is pressed, and the cab airbag is inflated / deflated via the inflation / deflation unit to raise or lower the cab height.

2. The commercial vehicle cab height adjustment system according to claim 1, characterized in that, The inflation / deflation unit includes a first solenoid valve (1), a second solenoid valve (2), a third solenoid valve (3), a fourth solenoid valve (4), a front height adjustment valve (5), a left rear height adjustment valve (6), and a right rear height adjustment valve (7). The first solenoid valve (1) is connected to the front height adjustment valve (5), the left rear height adjustment valve (6), and the right rear height adjustment valve (7) via a tee. The front height adjustment valve (5) is connected to the fourth solenoid valve (4), the left front airbag (8), and the right front airbag (9) via a tee. The left rear height adjustment valve (6) is connected to the left rear airbag (10) and the second solenoid valve (2) via a tee. The right rear height adjustment valve (7) is connected to the right rear airbag (11) and the third solenoid valve (3) via a tee.

3. The commercial vehicle cab height adjustment system according to claim 2, characterized in that, When the cab height needs to be lowered, press the height adjustment switch. The first solenoid valve (1) closes, and at this time, there is no gas supply to the left front airbag (8), right front airbag (9), left rear airbag (10), and right rear airbag (11). The second solenoid valve (2), third solenoid valve (3), and fourth solenoid valve (4) open, expelling some of the gas from the left front airbag (8), right front airbag (9), left rear airbag (10), and right rear airbag (11), thus lowering the cab height. Then, the second solenoid valve (2), third solenoid valve (3), and fourth solenoid valve (4) close to prevent the left front airbag (8), right front airbag (9), and left rear airbag (10) from being lowered. Leakage of residual gas in the right rear airbag (11); When the cab height needs to be raised, press the height adjustment switch, the first solenoid valve (1) opens, and gas is filled into the left front airbag (8), right front airbag (9), left rear airbag (10), and right rear airbag (11) through the front height adjustment valve (5), left rear height adjustment valve (6) and right rear height adjustment valve (7). When the gas in the left front airbag (8), right front airbag (9), left rear airbag (10) and right rear airbag (11) reaches the set threshold of the front height adjustment valve (5), left rear height adjustment valve (6) and right rear height adjustment valve (7), inflation stops, thereby raising the cab height.

4. The commercial vehicle cab height adjustment system according to claim 3, characterized in that, The height adjustment switch is equipped with a working indicator light and a backlight indicator light.

5. The commercial vehicle cab height adjustment system according to claim 4, characterized in that, The first solenoid valve (1) is a normally open solenoid valve; the second solenoid valve (2), the third solenoid valve (3) and the fourth solenoid valve (4) are normally closed solenoid valves.

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