CN217804214U - Light vehicle chassis and light vehicle - Google Patents

Abstract

The utility model relates to a light vehicle chassis and light vehicle, light vehicle chassis installs in the automobile body of light vehicle, and light vehicle chassis includes: a chassis main body; the axle is arranged on one side of the chassis main body; and the air suspension system is arranged on the chassis main body and connected with the axle, and comprises an air bag which can be controlled to reciprocate in the vertical direction. The light vehicle chassis comprises a chassis main body, an axle and an air suspension system, wherein the air bag can be controlled to reciprocate in the vertical direction, the air suspension system replaces a common suspension system, the air suspension system adopts an air spring (namely the air bag), the change speed of the air spring is slow and easy to control, and the height change of a vehicle in the vertical direction can be compensated by controlling the inflation or the exhaust of the air spring, so that the stability, the smoothness and the comfort of the vehicle in the driving process are improved.

Description

Light vehicle chassis and light vehicle

Technical Field

The utility model relates to a light vehicle technical field especially relates to a light vehicle chassis and light vehicle.

Background

With the development of vehicle technology, vehicles have gradually become indispensable vehicles in people's production and life. The light vehicle is refitted into other vehicles based on a light vehicle chassis in China, such as a nucleic acid detection vehicle, an emergency medical vehicle and the like, and due to the particularity of the use scene of the vehicles, the vehicles have higher requirements on the performances such as smoothness and operation stability in the driving process of the whole vehicle compared with the light vehicles before refitting, and particularly, the refitted vehicles except the driving area have more strict requirements on the smoothness and stability of the vehicle when the middle and rear sections of the vehicle body are all operation working areas.

However, the chassis space of the light vehicle is tight, the arrangement of the common suspension (such as a plate spring suspension) is difficult, and the common suspension cannot meet the requirements of the steering stability of the vehicle under the high-speed working condition, the driving smoothness on the low-speed bumpy road section and the riding comfort in the working area.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a light vehicle chassis and a light vehicle capable of achieving the operation stability under the high-speed working condition and the ride comfort under the low-speed bumpy road segment and the ride comfort in the working area, aiming at the problem that the operation stability of the vehicle under the high-speed working condition, the ride comfort under the low-speed bumpy road segment and the ride comfort in the working area cannot be achieved by a common suspension.

According to an aspect of the present application, there is provided a light vehicle chassis to be mounted to a body of a light vehicle, the light vehicle chassis including:

a chassis main body;

an axle mounted on one side of the chassis main body; and

and the air suspension system is mounted on the chassis main body and the axle and comprises an air bag which can be controlled to reciprocate in the vertical direction.

In one embodiment, the air suspension system comprises:

one end of the guide arm is rotatably arranged on the chassis main body, and the other end of the guide arm is connected to the axle;

the air bag bracket is arranged on the chassis main body, and two opposite ends of the air bag are respectively arranged at the air bag bracket and one end of the guide arm connected to the axle; and

the air supply unit is installed on the chassis main body, an air outlet of the air supply unit is communicated with an air inlet of the air bag through a pipeline, and the air supply unit is used for supplying air to the air bag.

In one embodiment, the gas supply unit includes:

the air pump bracket is arranged on the chassis main body, and the air pump is arranged on the air pump bracket; and

the chassis comprises a chassis main body, a gas storage tank support and a gas storage tank, wherein the gas storage tank support is arranged in the chassis main body, the gas storage tank is arranged in the gas storage tank support, the gas inlet of the gas storage tank is communicated with the gas outlet of the air pump through a pipeline, and the gas outlet of the gas storage tank is communicated with the gas inlet of the gas bag through a pipeline.

In one embodiment, the air pump includes:

an air pump body having an air outlet;

a drain valve installed at the air pump main body; and

and the drying tank is arranged in the air pump main body, an air inlet of the drying tank is communicated with an air outlet of the air pump main body through a pipeline, and an air outlet of the drying tank is communicated with an air inlet of the air storage tank through a pipeline.

In one embodiment, the air storage tank comprises an air storage tank main body, a pressure switch, a pressure release valve and an inflation valve, the air storage tank main body is provided with a containing cavity, the pressure switch and the pressure release valve are arranged on the outer side of the air storage tank main body at intervals and communicated with the containing cavity, and the inflation valve is installed on the chassis main body and communicated with the containing cavity through a pipeline.

In one embodiment, the air suspension system further comprises a height valve bracket and a height valve, one end of the height valve bracket is mounted on the chassis main body, the other end of the height valve bracket is mounted on the axle, the height valve is mounted on the height valve bracket, an air inlet of the height valve is communicated with an air outlet of the air storage tank through a pipeline, and an air outlet of the height valve is communicated with an air inlet of the air bag through a pipeline.

In one embodiment, the altimeter includes an altimeter body and an altimeter ball tie rod, one end of the altimeter body is mounted to the altimeter bracket, one end of the altimeter ball tie rod is rotatably connected to the other end of the altimeter body, and the other end of the altimeter ball tie rod is rotatably mounted to the altimeter bracket.

In one embodiment, the air suspension system further comprises a shock absorber bracket mounted to the chassis body and a shock absorber mounted to the shock absorber bracket.

In one embodiment, the air suspension system further includes a stabilizer bar boom support installed at the chassis body, a stabilizer bar support installed at the axle, a stabilizer bar, a thrust rod support, and a lateral thrust rod, opposite ends of the stabilizer bar boom being rotatably installed at one end of the stabilizer bar boom support and one end of the stabilizer bar, respectively, the stabilizer bar being rotatably installed at the stabilizer bar support, the thrust rod support being installed at the axle, one end of the lateral thrust rod being rotatably installed at the thrust rod support, and the other end of the lateral thrust rod being installed at the guide arm.

According to another aspect of the application, a light vehicle is provided, comprising the above-mentioned light vehicle chassis, said light vehicle further comprising a body, said light vehicle chassis being mounted to said body.

The light vehicle chassis comprises a chassis main body, an axle and an air suspension system, wherein the air suspension system comprises an air bag, the air bag can be controlled to reciprocate in the vertical direction, the air suspension system replaces a common suspension system, the air suspension system adopts an air spring (namely the air bag), the change speed of the air spring is slow and easy to control, the height change of a vehicle in the vertical direction can be compensated by controlling the inflation or the exhaust of the air spring, and therefore the stability, the smoothness and the comfort of the vehicle in the driving process are improved.

Drawings

FIG. 1 is an assembly view of the chassis of the utility model;

FIG. 2 is an assembly schematic view of the air suspension system of the present invention;

FIG. 3 is a schematic view of the installation of the altimeter valve of the present invention;

FIG. 4 is a schematic view of the airbag and the guide arm of the present invention;

fig. 5 is a schematic view illustrating the installation of the stabilizer bar and the stabilizer bar boom of the present invention;

fig. 6 is a schematic diagram of the air supply unit of the present invention.

The reference numbers illustrate:

10. a light vehicle chassis; 110. a chassis main body; 120. an axle; 200. an air suspension system; 210. a guide arm; 211. a revolute pair; 213. a U-shaped bolt; 220. an air bag stent; 230. an air bag; 240. an air supply unit; 241. an air pump bracket; 242. an air pump; 2421. an air pump main body; 2422. a drain valve; 2423. a drying tank; 243. a gas tank holder; 244. a gas storage tank; 2441. a main body of the gas storage tank; 2442. a pressure switch; 2443. a pressure relief valve; 2444. an inflation valve; 250. a altitude valve support; 251. a first bracket; 252. a second bracket; 260. a altitude valve; 261. a height valve body; 262. a height valve ball head pull rod; 272. a shock absorber support; 273. a shock absorber; 274. a stabilizer bar boom support; 275. a stabilizer bar support; 276. a stabilizer bar boom; 277. a stabilizer bar; 278. a thrust rod support; 279. a lateral thrust rod.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

Referring to fig. 1 to 6, fig. 1 shows the utility model discloses the assembly schematic diagram of light vehicle chassis, fig. 2 shows the utility model discloses air suspension system's assembly schematic diagram, fig. 3 shows the utility model discloses the installation schematic diagram of altitude valve, fig. 4 shows the utility model discloses the installation schematic diagram of gasbag and guiding arm, fig. 5 shows the utility model discloses stabilizer bar and stabilizer bar jib, fig. 6 shows the utility model discloses air supply unit's principle schematic diagram.

The present application provides a light vehicle chassis 10 for a light vehicle comprising a chassis body 110, an axle 120 and an air suspension system 200, the air suspension system 200 comprising an air bag 230, the air bag 230 being controllable to move back and forth in a vertical direction. In this way, the air suspension system 200 is adopted to replace a common suspension (such as a plate spring suspension), and the air suspension system 200 adopts an air spring (i.e. the air bag 230), so that the air spring has the advantages of slower movement speed, smaller dynamic change force, easy control and the like compared with the common spring, and the control stability of the light vehicle under the high-speed working condition can be effectively improved and the smoothness of the light vehicle running on a low-speed bump road section and the riding comfort of the light vehicle in a working area can also be improved by controlling the air inflation or the air exhaust of the air spring.

Specifically, referring to fig. 1 and 2, a chassis main body 110 is mounted to the bottom of the vehicle, an axle 120 is mounted to one side of the chassis main body 100, and an air suspension system 200 is mounted to the chassis main body 110 and coupled to the axle 120. Wherein the air suspension system 200 is controllably reciprocated in the vertical direction. As such, the air suspension system 200 can maintain the smoothness of the vehicle by moving in the vertical direction when the vehicle travels at a high speed, and the air suspension system 200 can alleviate the vibration of the vehicle by moving in the vertical direction when the vehicle travels on a bumpy road section.

With continued reference to fig. 3-6, the air suspension system 200 includes a guide arm 210, an air bag bracket 220, an air bag 230, and an air supply unit 240. The guide arm 210 is substantially Z-shaped, one end of the guide arm 210 is provided with a revolute pair 211, the revolute pair 211 is rotatably mounted to the chassis main body 110, and the other end of the guide arm 210 is connected to the axle 120. The airbag housing 220 has an irregular plate-shaped structure, and the airbag housing 220 is mounted to the chassis main body 110. The airbag 230 is a hollow container having a receiving cavity, opposite ends of the airbag 230 are respectively mounted on a side of the airbag support 220 away from the chassis body 110 of the light vehicle and a side of the guide arm 210 away from the chassis body 110, the airbag 230 is opened with an air inlet and an air outlet having one end communicating with the receiving cavity, the other end of the air inlet of the airbag 230 communicates with the air outlet of the air supply unit 240, and the other end of the air outlet of the airbag 230 communicates with the atmosphere. The air supply unit 240 is installed at the chassis main body 110, an air outlet of the air supply unit 240 communicates with an air inlet of the airbag 230 through a duct, and the air supply unit 240 serves to supply air to the airbag 230.

It should be noted that the number of the guide arms 210, the airbag holders 220 and the airbags 230 is two, two guide arms 210 are connected to the axle 120 at intervals and symmetrically near one end of the airbags 230, two airbag holders 220 are installed at intervals and symmetrically on the chassis main body 110, two airbags 230 are arranged at intervals and symmetrically, and each airbag 230 is installed on one guide arm 210 and one airbag holder 220 located on the same side.

In a preferred embodiment, each guide arm 210 is capable of being attached to the axle 120 by two spaced apart U-bolts 213. It is understood that the connection manner of the guide arm 210 and the axle 120 and the specific type and number of the connection members are not limited thereto, and may be set as required to meet different requirements.

Thus, the revolute pair 211 can rotate along with the vibration of the vehicle, and further drives the guide arm 210 to change along with the height change of the air bag 230, the air bag 230 is inflated through the air supply unit 240, the depression of the vehicle running on a low-lying road section can be compensated, the lifting of the vehicle running on a high-rise road section can be compensated through the air supply of the air bag 230, the comfort of the vehicle is improved, and when the vehicle runs at a high speed, the air bag 230 can play a role in buffering, and the operation stability is improved.

Further, the air supply unit 240 includes an air pump holder 241, an air pump 242, an air tank holder 243, and an air tank 244. The air pump bracket 241 is installed at one end of the chassis main body 110 far away from the air bag 230, the air pump 242 is a hollow container having a receiving cavity, and the air pump 242 is installed at the air pump bracket 241. The air storage tank bracket 243 is mounted on the chassis main body 110 and located between the air pump 242 and the air bag 230, the air storage tank 244 is mounted on one side of the air storage tank bracket 243 far away from the chassis main body 110, an air inlet of the air storage tank 244 is communicated with an air outlet of the air pump 242 through a pipeline, and an air outlet of the air storage tank 244 is communicated with an air inlet of the air bag 230 through a pipeline.

As such, the air pump 242 can compress air to form high-pressure air and deliver the high-pressure air into the air tank 244, and the air tank 244 can store the high-pressure air and deliver the stored high-pressure air to the airbag 230 to inflate the airbag 230, thereby improving the stability and comfort of the vehicle during driving.

With continued reference to fig. 6, in particular, in some embodiments, the air pump 242 includes an air pump body 2421, a drain valve 2422, and a dry tank 2423. The drain valve 2422 is mounted on the air pump main body 2421, the drying tank 2423 is mounted on the air pump main body 2421, the air inlet of the drying tank 2423 is communicated with the air outlet of the air pump main body 2421 through a pipeline, and the air outlet of the drying tank 2423 is communicated with the air inlet of the air storage tank 244 through a pipeline. In this way, when the air pump 242 is started, the water drain valve 2422 is opened for a period of time (the time can be set as required) and then closed, the air pump 242 is also closed, the air pump main body 2421 dries the compressed high-pressure air through the drying tank 2423 and then delivers the dried high-pressure air to the air storage tank 244, the air pump 242 is started again, at this time, the water drain valve 2422 is opened again, the high-pressure air in the air storage tank 244 can blow the moisture in the drying tank 2423 into the atmosphere, and therefore the drying tank 2423 is ensured to be in a dry state, and the drying of the high-pressure air delivered to the air storage tank 244 is ensured.

Further, the air tank 244 includes a tank body 2441, a pressure switch 2442, a pressure relief valve 2443, and a charge valve 2444. The gas holder main body 2441 has a holding cavity (not shown in the figure), the holding cavity is used for holding high-pressure air output from the air pump 242, the gas holder main body 2441 is further provided with an air inlet and an air outlet, one end of the air inlet is communicated with the air inlet and the air outlet of the holding cavity, the other end of the air inlet of the gas holder main body 2441 is communicated with the air outlet of the air pump 242, the other end of the air outlet of the gas holder 2441 is communicated with the air inlet of the air bag 230, the pressure switch 2442 and the pressure release valve 2443 are arranged on the outer side of the gas holder main body 2441 at intervals and are communicated with the holding cavity, and the inflation valve 2444 is arranged on the chassis main body 110 and is communicated with the holding cavity through a pipeline. Specifically, one end of the pressure switch 2442 is communicated with the accommodating cavity, the other end of the pressure switch 2442 is electrically connected to the control system (not shown in the figure), and the pressure switch 2442 can monitor a pressure value of the high-pressure air in the accommodating cavity and transmit the monitored pressure value to the control system to control the air pump 242 to be turned on and turned off. The pressure relief valve 2443 is arranged on the outer side of the air storage tank main body 2441 and is communicated with the accommodating cavity, when the pressure relief valve 2443 is opened, air can be exhausted and relieved, one end of the inflation valve 2444 is communicated with the accommodating cavity through a pipeline, the other end of the inflation valve 2444 is used for inflation, and the inflation object can be a wheel or other parts needing inflation.

In this way, the air tank 244 can not only supply air to the airbag 230, but also inflate other components through the inflation valve 2444, and can exhaust and release pressure through the relief valve 2443.

In some embodiments, air suspension system 200 further includes a height valve bracket 250 and a height valve 260. One end of the altitude valve bracket 250 is mounted to the end of the chassis main body 110 away from the air pump 242, and the other end of the altitude valve bracket 250 is mounted to the axle 120. Specifically, in one embodiment, the altitude valve bracket 250 includes a first bracket 251 and a second bracket 252, the first bracket 251 is substantially L-shaped and is mounted at one end of the chassis main body 110 away from the air pump 242, the second bracket 252 is substantially L-shaped, one end of the second bracket 252 is mounted at the axle 120, and the other end is connected to one end of the altitude valve 260.

The altitude valve 260 is mounted on the altitude valve bracket 250, the air inlet of the altitude valve 260 is communicated with the air outlet of the air storage tank 244 through a pipeline, and the air outlet of the altitude valve 260 is communicated with the air inlet of the air bag 230 through a pipeline. Specifically, the altitude valve 260 includes an altitude valve main body 261 and an altitude valve ball pull rod 262, one end of the altitude valve main body 261 is mounted to the first bracket 251, one end of the altitude valve ball pull rod 262 is rotatably connected to the other end of the altitude valve main body 261, and the other end of the altitude valve ball pull rod 262 is rotatably mounted to the second bracket 252. Preferably, the height valve ball head pull rod 262 is hinged at both ends.

It should be noted that the altitude valve body 261 is generally in a horizontal state, when the vehicle runs on a bumpy road section or runs at a high speed, the altitude valve body 261 can drive the altitude valve ball rod 262 to rotate, and the altitude valve 260 can sense the change of the vehicle height, acquire the change value of the vehicle height and transmit the change value to the control system to control the inflation or exhaust action of the air bag 230, so as to adjust the height of the air bag 230, improve the comfort of the driver and passengers, and simultaneously prevent the road surface from being damaged due to the impact of the wheels.

In some embodiments, air suspension system 200 further includes a shock absorber bracket 272 mounted to chassis body 110 and a shock absorber 273 mounted to shock absorber bracket 272. Preferably, shock absorber 273 is a hydraulic shock absorber. Thus, when the vehicle is in heavy vibration during driving, the shock absorber 273 can change its damping to buffer the vibration, thereby improving the smoothness of the vehicle.

In some embodiments, the air suspension system 200 further includes a stabilizer bar boom bracket 274, a stabilizer bar bracket 275, a stabilizer bar boom 276, a stabilizer bar 277, a thrust bar bracket 278, and a lateral thrust bar 279 positioned between the two guide arms 210. A stabilizer bar boom bracket 274 is mounted to the chassis body 110 between the air pump 242 and the lateral thrust rod 279, a stabilizer bar bracket 275 is mounted to the axle 120 between the stabilizer bar boom 276 and the lateral thrust rod 279, opposite ends of the stabilizer bar boom 276 are rotatably mounted to the stabilizer bar bracket 274 and one end of the stabilizer bar 277, respectively, the stabilizer bar 277 is rotatably mounted to the stabilizer bar bracket 275, the thrust rod bracket 278 is mounted to the axle 120 between the air bag 230 and the stabilizer bar 277, one end of the lateral thrust rod 279 is rotatably mounted to the thrust rod bracket 278, and the other end of the lateral thrust rod 279 is mounted to the guide arm 210. Preferably, the opposite ends of the stabilizer bar boom 276 are hingedly connected and one end of the lateral thrust rod 279 is hingedly connected to the thrust rod bracket 278.

It should be noted that the number of the stabilizer bar boom brackets 274, the stabilizer bar brackets 275, and the stabilizer bar 276 is two, the two stabilizer bar boom brackets 274 are mounted to the chassis main body 110 at intervals and symmetrically and are located at opposite ends of the stabilizer bars 277 in the longitudinal direction thereof, the two stabilizer bar brackets 275 are mounted to the axle 120 at intervals and symmetrically and are located at opposite ends of the stabilizer bars 277 in the longitudinal direction thereof, the stabilizer bar brackets 275 are used to support and mount the stabilizer bars 277, one end of each stabilizer bar boom 276 is mounted to one of the stabilizer bar bracket 274, and the other end is mounted to one end of the corresponding stabilizer bar 277.

In this manner, when the vehicle vibrates, stabilizer bar 277 rotates, and stabilizer bar hanger 276 connected to opposite ends of stabilizer bar 277 rotates, preventing the vehicle from rolling.

The application also provides a light vehicle (not shown in the figures), which comprises the light vehicle chassis 10, and the light vehicle also comprises a vehicle body (not shown in the figures), wherein the light vehicle chassis 10 is arranged on the vehicle body. Thus, when the height of the vehicle changes or the vehicle vibrates greatly, the light vehicle chassis 10 can compensate the height change of the vehicle through the air suspension system 200, and achieve the effect of buffering and damping, so as to improve the stability, smoothness and comfort of the vehicle.

It should be noted that, when the light vehicle is an emergency medical vehicle, the overall height of the vehicle can be reduced by controlling the air bag 230 to exhaust air as required.

In conclusion, the present application provides a light vehicle chassis 10 and a light vehicle, which can compensate the height variation of the light vehicle during the driving process through an air suspension system 200, and can also play a role in buffering and damping vibration, thereby improving the stability, smoothness and comfort of the vehicle.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A chassis for a light vehicle, to be mounted on a body of the light vehicle, characterized in that the chassis for a light vehicle comprises:

a chassis main body;

the axle is arranged on one side of the chassis main body; and

an air suspension system mounted to the chassis body and connected to the axle, the air suspension system including an air bag and a stabilizer bar;

the air bag can be controlled to reciprocate in the vertical direction, and is an air spring;

the stabilizer bar is rotatably arranged on the axle.

2. The light vehicle chassis according to claim 1, characterized in that the air suspension system further comprises:

one end of the guide arm is rotatably arranged on the chassis main body, and the other end of the guide arm is connected to the axle;

the air bag bracket is arranged on the chassis main body, and two opposite ends of the air bag are respectively arranged at the air bag bracket and one end of the guide arm connected to the axle; and

and the air supply unit is arranged in the chassis main body, an air outlet of the air supply unit is communicated with an air inlet of the air bag through a pipeline, and the air supply unit is used for supplying air for the air bag.

3. The light vehicle chassis according to claim 2, wherein the air supply unit comprises:

the air pump bracket is arranged on the chassis main body, and the air pump is arranged on the air pump bracket; and

the chassis comprises a chassis main body, an air pump, an air storage tank support and an air storage tank, wherein the air storage tank support is arranged in the chassis main body, the air storage tank is arranged in the air storage tank support, an air inlet of the air storage tank is communicated with an air outlet of the air pump through a pipeline, and an air outlet of the air storage tank is communicated with an air inlet of the air bag through a pipeline.

4. The pickup truck chassis of claim 3, wherein the air pump comprises:

an air pump body having an air outlet;

a drain valve installed at the air pump main body; and

and the drying tank is arranged in the air pump main body, an air inlet of the drying tank is communicated with an air outlet of the air pump main body through a pipeline, and an air outlet of the drying tank is communicated with an air inlet of the air storage tank through a pipeline.

5. The light vehicle chassis according to claim 3, wherein the gas tank comprises a gas tank main body, a pressure switch, a pressure relief valve and an inflation valve, the gas tank main body is provided with a containing cavity, the pressure switch and the pressure relief valve are arranged at intervals outside the gas tank main body and communicated with the containing cavity, and the inflation valve is installed on the chassis main body and communicated with the containing cavity through a pipeline.

6. The light vehicle chassis according to claim 3, wherein the air suspension system further comprises a height valve bracket and a height valve, one end of the height valve bracket is mounted on the chassis main body, the other end of the height valve bracket is mounted on the axle, the height valve is mounted on the height valve bracket, an air inlet of the height valve is communicated with an air outlet of the air storage tank through a pipeline, and an air outlet of the height valve is communicated with an air inlet of the air bag through a pipeline.

7. The light vehicle chassis according to claim 6, wherein the altic valve includes an altic valve body and an altic valve ball rod, one end of the altic valve body is mounted to the altic valve bracket, one end of the altic valve ball rod is rotatably connected to the other end of the altic valve body, and the other end of the altic valve ball rod is rotatably mounted to the altic valve bracket.

8. A light vehicle chassis according to claim 1, characterised in that the air suspension system further comprises a shock absorber bracket mounted to the chassis body and a shock absorber mounted to the shock absorber bracket.

9. The light-duty vehicle chassis according to claim 2, wherein said air suspension system further includes a stabilizer bar boom bracket mounted to said chassis body, a stabilizer bar bracket mounted to said axle, a stabilizer bar boom mounted to said axle, opposite ends of said stabilizer bar boom being rotatably mounted to said stabilizer bar bracket and one end of said stabilizer bar, respectively, said stabilizer bar being rotatably mounted to said stabilizer bar bracket, said thrust bar bracket mounted to said axle, one end of said lateral thrust rod being rotatably mounted to said thrust bar bracket, and the other end of said lateral thrust rod being mounted to said guide arm.

10. A light vehicle, characterized in that it comprises a chassis of any one of the claims 1-9, said light vehicle further comprising a body, to which said chassis of the light vehicle is mounted.

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