CN219284685U

CN219284685U - Functional test bench system for commercial vehicle electric control air suspension system

Info

Publication number: CN219284685U
Application number: CN202223027128.6U
Authority: CN
Inventors: 张方明; 金浩; 张利君; 毛和玉; 郑小波
Original assignee: Zhejiang Keli Vehicle Control System Co Ltd
Current assignee: Zhejiang Keli Vehicle Control System Co Ltd
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-06-30
Anticipated expiration: 2032-11-14

Abstract

The utility model relates to the field of commercial vehicle suspension testing, and discloses a functional test bench system for an electric control air suspension system of a commercial vehicle, which comprises a frame system (1) and a road surface simulation system, and further comprises a suspension system (3), wherein the suspension system (3) is arranged on the frame system (1), the suspension system (3) comprises an axle (31), wheels (32) and air springs (33) which are arranged on the axle (31), the road surface simulation system comprises a plurality of road surface simulation lifting devices (2), the wheels (32) are arranged on the road surface simulation lifting devices (2), a pressure sensor (4) is arranged on the air springs (33), and a height sensor (5) is arranged on the axle (31). The utility model can accelerate the research and development process and improve the product quality, and can finish the running condition of the vehicle electric control suspension in a laboratory under different speeds and different load working conditions, thereby ensuring the safety performance.

Description

Functional test bench system for commercial vehicle electric control air suspension system

Technical Field

The utility model relates to the field of commercial vehicle suspension testing, in particular to a functional test bench system for an electric control air suspension system of a commercial vehicle.

Background

Compared with the traditional plate spring suspension, the electronic control air suspension system (ECAS) of the commercial vehicle has the characteristics of rigidity change, damping change, low self-vibration frequency, high controllability, load self-adaption and the like, can effectively reduce vibration, can control the height of the vehicle according to the road surface condition, load, vehicle speed and other working conditions, and can effectively improve the safety, comfort and smoothness of the vehicle, so that the system has wide market space in the next years. Of course, in the early-stage research and development of the electric control air suspension system, the logic control and the function implementation of the system are required to be tested and verified, the link is indispensable in the development of new products, the functions of the system can be quickly regulated and verified in a relatively safe environment, the test cost is effectively reduced, the fact that a new developed product is directly subjected to real vehicle test under the condition of lacking in principle verification can be avoided, and the safety is improved.

An existing scheme (patent number is CN 209727479U) is a commercial vehicle air suspension system function test bench and system, and the test bench comprises a chassis framework, wheels, a suspension device and a rear lifting bridge assembly. The chassis framework comprises at least two U-shaped portal frames, a supporting frame and a plurality of connecting rods, wherein the supporting frame is in sliding connection with the upright posts of the U-shaped portal frames and the connecting rods respectively; the suspension system is arranged on the chassis framework through a connecting rod and a supporting frame; the lifting bridge assembly comprises a rear lifting bridge bracket, a lifting bridge, at least one cylinder and two air springs.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a functional test bench system for an electric control air suspension system of a commercial vehicle.

In order to solve the technical problems, the utility model is solved by the following technical scheme:

the utility model provides a functional test rack system for automatically controlled air suspension system of commercial car, including frame system and road surface analog system, frame system includes many car hack levers and is located the balancing weight of car hack lever solid dress, still include suspension system, suspension system installs on frame system, suspension system includes the axletree and installs wheel and air spring on the axletree, road surface analog system includes a plurality of road surface analog lifting devices, the wheel is placed on road surface analog lifting devices, install pressure sensor on the air spring, install height sensor on the axletree.

Preferably, the road surface simulation lifting devices are multiple and are matched with the wheels one by one, and each road surface simulation lifting device comprises a lifting tray, a lifting rod and a lifting base; the lifting base is fixed on the ground, one end of the lifting rod is arranged on the lifting base, the other end of the lifting rod is connected with the lifting tray and drives the lifting tray to move up and down, wheels are matched with the lifting tray and placed on the lifting tray, the lifting tray is provided with an upward convex edge, the convex edge can prevent the wheels from sliding and separating from the lifting tray, the lifting rod can be realized through an electric push rod or a hydraulic push rod, the electric push rod is simple to install and convenient to detach, the lifting force is small, the lifting speed is low, only the driving conditions of a vehicle on a low speed and a flat road surface can be simulated, the hydraulic push rod needs a hydraulic supply and oil liquid transmission system, the installation is complex, the lifting speed is general, the thrust of the hydraulic push rod is larger than that of the electric push rod, the poor road surface can be simulated, the road surface simulation system can realize the rolling and pitching suspension performances of the vehicle under different road conditions and different vehicle speeds, and can also perform the function test of the manual and automatic control strategy and the switching of the electric control air suspension.

As the preference, road surface simulation lifting device still includes guide component, guide component includes guide bar and ball linear bearing, ball linear bearing's bottom links to each other and vertical setting with lifting the base, the upper end and the tray rigid coupling that lifts of guide bar, the lower extreme of guide bar inserts in the ball linear bearing and cooperates with it, guide component can realize lifting the vertical motion of base of lifting of guide shaft perpendicular to in the tray, this design possesses characteristics such as the clearance is little, friction is low, life-span height, lifting the base and bending and welding by four millimeter iron plates and forming, be fixed in ground through the inflation screw, guarantee lifting system whole stable output.

Preferably, the frame rods comprise a plurality of main supporting rods and connecting rods, the connecting rods are connected with each other to form a headstock, a connecting section and a carriage, the plurality of main supporting rods are horizontally paved in the lower part of a frame formed by the connecting rods in parallel, and the balancing weights are fixedly arranged on the main supporting rods; the main supporting rod and the connecting rod are 60X 60 aluminum sections, the total length of the whole frame is 6 meters, the total height is 2.12 meters (without suspension), and the total width is 1.6 meters; the installation of the sectional materials can prevent the vertical sectional materials from horizontally shifting, a larger space is reserved above the main supporting rod, a gas path supply and transmission system, a gas path control element and an electronic control system can be placed in the space, for example, an air compressor, a gas storage tank, an electromagnetic valve group, a gas pipe, an electric control suspension controller, a controller signal and power supply circuit and the like.

Preferably, the air spring is provided with an air spring base, a first air spring fixing plate and a second air spring fixing plate, the air spring is fixedly arranged on the axle through the air spring base, the first air spring fixing plate and the second air spring fixing plate are fixedly arranged on the upper surface of the air spring and fixedly connected with the main supporting rod, and the air spring has the effect of charging and discharging the air through the air pipe to realize the lifting and descending movement of the vehicle chassis in the vertical direction.

Preferably, the suspension system further comprises a shock absorption component, the shock absorption component comprises a shock absorber, a first shock absorption double-lug base, a second shock absorption double-lug base and a shock absorber fixing plate, two ends of the shock absorber are respectively fixed on the air spring base and a main support in the frame system through the first shock absorption double-lug base and the second shock absorption double-lug base, so that the damping effect of the frame and an axle in relative motion can be achieved, an included angle formed by the shock absorber and a chassis surface of the frame system is larger than 75 degrees, enough travel is provided for the shock absorber in the ascending or descending process of the frame, enough space is reserved for the air spring, and interference with other components after the air spring is expanded is avoided.

Preferably, the suspension system further comprises a pull rod assembly, wherein the pull rod assembly comprises two diagonal pull rods and two horizontal pull rods, and both ends of the diagonal pull rods and the horizontal pull rods are provided with external threads and are matched with ball bearings; the two diagonal draw bars are symmetrically arranged left and right and extend outwards obliquely to be crossed, the inner end and the outer end of each diagonal draw bar are respectively and fixedly provided with a first fixing plate and a first double-lug base through ball bearings, and the first double-lug base is fixedly provided with a first double-lug base fixing plate; the horizontal pull rod is axially arranged along the frame system, the inner end of the horizontal pull rod is connected with the axle, the inner end and the outer end of the horizontal pull rod are fixedly provided with a second double-lug base through ball bearings, the second double-lug base is fixedly provided with a second double-lug base fixing plate, and the first double-lug base fixing plate and the second double-lug base fixing plate are fixedly connected with the frame system. The suspension system moves in a vertical plane under the action of the resultant force of the two pairs of pull rods (V-shaped four-bar links) on the axle and the frame system.

Preferably, the vehicle height sensor further comprises a height sensor fixing seat, a first height sensor connecting rod, a second height sensor connecting rod and a connecting rod fixing seat, wherein the height sensor is fixed on the vehicle frame system through the height sensor fixing seat, one end of the first height sensor connecting rod is connected with a rotating shaft of the height sensor, the other end of the first height sensor connecting rod is connected with the upper end of the vertically placed second height sensor connecting rod, the lower end of the second height sensor connecting rod is fixed on the vehicle axle through the connecting rod fixing seat, therefore, when the vehicle axle and the vehicle frame relatively move, the first height sensor connecting rod is pushed by the second height sensor connecting rod to do rotary motion taking the rotating shaft of the height sensor as the center, an angle value formed through rotation is converted into an inductance change value, then the inductance change value is converted into an identifiable signal through a conditioning circuit, then the height difference value of the vehicle axle and the vehicle frame is obtained, the height sensor fixing seat is provided with a long groove, and the position of the height sensor is convenient to adjust.

The lifting mechanism comprises a lifting guide assembly, a lifting arm, a guide rod and a traction rope, wherein the lifting guide assembly is formed by building an aluminum profile, the lifting arm, the guide rod and the traction rope are fixedly connected with the lifting arm through a first air spring fixing plate and a second air spring fixing plate, the vertically arranged guide rod is fixed on the lifting arm through a profile connecting piece, the lifting guide assembly is of a groined structure, the guide rod is matched with the lifting guide assembly to ensure that the air spring moves vertically to a frame without deflecting when the air spring is inflated and deflated, meanwhile, the two ends of the lifting arm are respectively hung with one traction rope, the lower ends of the traction rope are directly sleeved on an axle, when the lifting mechanism receives a lifting signal sent by a controller, the air spring is inflated, the guide rod moves upwards along the guide mechanism, the lifting arm moves upwards, meanwhile, the traction rope and the axle connected with the lifting arm are lifted upwards, the lifting function of the lifting bridge is completed, and conversely, when the lifting mechanism receives a descending signal, the air spring deflates, the axle is inflated by gravity, and the function of the lifting bridge is achieved under the action of the descending function of the lifting spring.

Preferably, the device also comprises a controller, wherein the controller comprises a pavement simulation control unit and an electric control air suspension ECU, the pavement simulation control unit is connected with the pavement simulation lifting device and controls the pavement simulation lifting device to work, the electric control air suspension ECU is connected with an electromagnetic valve and controls the lifting bridge lifting mechanism to work through the electromagnetic valve, the pavement simulation lifting device and the lifting bridge lifting mechanism drive the suspension system to move, and a pressure sensor and a height sensor on the suspension system send sensor signals to the electric control air suspension ECU.

The utility model has the remarkable technical effects due to the adoption of the technical scheme: the restoration degree of the commercial vehicle electric control suspension is improved, and various functions of the electric control suspension, such as an air spring inflation/deflation and quick response function, a lifting bridge control function, a height maintaining and adjusting function, a fault diagnosis function, an overload protection function and the like, can be effectively verified through the design and implementation of the functional test rack of the commercial vehicle electric control suspension; as an important link between design and development and actual vehicle testing, the utility model can accelerate the research and development process and improve the product quality, and can finish the running conditions of the vehicle electric control suspension at different speeds and under different load working conditions in a laboratory, thereby ensuring the safety performance.

Drawings

FIG. 1 is a schematic diagram of the frame system of the present utility model.

Fig. 2 is a schematic structural view of the road surface simulation lifting device of the present utility model.

Fig. 3 is a schematic structural view of the suspension system of the present utility model.

FIG. 4 is a view showing a lifting mechanism of a lifting bridge according to the present utility model

Fig. 5 is a functional block diagram of the present utility model.

The names of the parts indicated by the numerical references in the drawings are as follows: 1-frame system, 2-road surface analog lifting device, 3-suspension system, 4-pressure sensor, 5-height sensor, 6-lifting bridge lifting mechanism, 7-controller, 11-frame bar, 111-main supporting bar, 112-connecting rod, 12-balancing weight, 21-lifting tray, 22-lifting bar, 23-lifting base, 24-guiding component, 31-axle, 32-wheel, 33-air spring, 331-first air spring fixing plate, 332-second air spring fixing plate, 333-air spring base, 34-damping component, 341-damper, 342-first damping double-lug base, third-order wheel base and fourth-order wheel base 343-second shock-absorbing binaural base, 344-shock absorber fixing plate, 35-pull rod assembly, 351-diagonal-draw rod, 3511-first fixing plate, 3512-first binaural base, 3513-first binaural base fixing plate, 352-horizontal pull rod, 3521-second binaural base fixing plate, 353-ball bearing, 51-height sensor fixing seat, 52-first height sensor link, 53-second height sensor link, 54-link fixing seat, 61-lifting guide assembly, 62-lifting arm, 63-guide rod, 64-traction rope, 71-road surface analog control unit, 72-electric control air suspension ECU.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings and examples.

Example 1

The utility model provides a functional test rack system for automatically controlled air suspension system of commercial car, as shown, including frame system 1 and road surface analog system, frame system 1 includes many frame bars 11 and is located the balancing weight 12 that frame bar 11 adorned admittedly, still include suspension system 3, suspension system 3 installs on frame system 1, suspension system 3 includes axletree 31 and wheel 32 and air spring 33 of installing on axletree 31, road surface analog system includes a plurality of road surface analog lifting device 2, wheel 32 is placed on road surface analog lifting device 2, install pressure sensor 4 on the air spring 33, install height sensor 5 on the axletree 31.

Example 2

The same as the embodiment 1, except that the road surface simulation lifting device 2 has a plurality of and is matched with the wheels 32 one by one, the road surface simulation lifting device 2 comprises a lifting tray 21, a lifting rod 22 and a lifting base 23; the lifting base 23 is fixed on the ground, one end of the lifting rod 22 is arranged on the lifting base 23, the other end of the lifting rod 22 is connected with the lifting tray 21 and drives the lifting tray 21 to move up and down, the wheels 32 are matched with the lifting tray 21 and placed on the lifting tray 21, the lifting tray 21 is provided with an upward convex edge, the convex edge can prevent the wheels 32 from sliding away from the lifting tray 21, the lifting rod 22 can be realized by an electric push rod or a hydraulic push rod, the electric push rod is simple to install and convenient to detach, the lifting force is small, the lifting speed is low, only the running conditions of a vehicle on a low speed and a flat road surface can be simulated, the hydraulic push rod needs a hydraulic supply and oil liquid transmission system, so that the installation is complicated, the lifting speed is general, but the thrust of the hydraulic push rod is larger than that of the electric push rod, the poor road surface can be simulated, the running conditions of the vehicle in the vehicle can be simulated at a low speed, therefore, the road surface simulation system can realize the rolling and pitching suspension performance of the vehicle under different road conditions and different speeds, and the manual and automatic control strategy and the switching function test of the electric control air suspension can be performed.

The road surface simulation lifting device 2 further comprises a guide assembly 24, the guide assembly 24 comprises a guide rod and a ball type linear bearing, the bottom of the ball type linear bearing is connected with the lifting base 23 and is vertically arranged, the upper end of the guide rod is fixedly connected with the lifting tray 21, the lower end of the guide rod is inserted into the ball type linear bearing and matched with the ball type linear bearing, the guide assembly 24 can realize vertical movement of the guide shaft in the lifting tray 23 perpendicular to the lifting base 23, the design has the characteristics of small gap, low friction, long service life and the like, the lifting base 23 is formed by bending and welding a four-millimeter iron plate, and the guide rod is fixed on the ground through an expansion screw to ensure the integral stable output of the lifting system.

Example 3

As in embodiment 1, except that the frame bar 11 includes a main supporting bar 111 and a plurality of connecting bars 112, the connecting bars 112 are connected to each other to form a head, a connecting section and a compartment, the main supporting bar 111 is plural and is laid in parallel in the lower part of the frame formed by the connecting bars, and the weight block 12 is fixedly mounted on the main supporting bar 111; the main supporting rod 111 and the connecting rod 112 are both 60X 60 aluminum profiles, the total length of the whole frame is 6 meters, the total height is 2.12 meters without suspension, and the total width is 1.6 meters; the installation of the sectional materials can prevent the vertical sectional materials from horizontally shifting, a larger space is reserved above the main supporting rod 111, the air channel supply and transmission system and the control elements of the air channel can be placed inside the space, and the electronic control system, such as an air compressor, an air storage tank, an electromagnetic valve group, an air pipe, an electric control suspension controller, a controller signal and power supply circuit and the like, is reasonable in frame structural design and even in stress, and realizes the function test of the vehicle under heavy load and light load working conditions through the quality adjustment of the balancing weights.

Example 4

As in embodiment 1, except that the air spring 33 is provided with the air spring base 333, the first air spring fixing plate 331 and the second air spring fixing plate 332, the air spring 33 is fixedly mounted on the axle 31 through the air spring base 333, the first air spring fixing plate 331 and the second air spring fixing plate 332 are fixedly mounted on the upper surface of the air spring 33 and fixedly connected with the main supporting rod 111, and the air spring 33 functions in that it is inflated and deflated by an air pipe to realize the lifting and descending movement of the vehicle chassis in the vertical direction.

The suspension system 3 further comprises a shock absorption assembly 34, the shock absorption assembly 34 comprises a shock absorber 341, a first shock absorption double-lug base 342, a second shock absorption double-lug base 343 and a shock absorber fixing plate 344, two ends of the shock absorber 341 are respectively fixed on the air spring base 333 and a main support in the frame system 1 through the first shock absorption double-lug base 342 and the second shock absorption double-lug base 343, so that a damping effect of the frame and an axle in relative motion can be achieved, an included angle formed by the shock absorber 341 and the chassis surface of the frame system 1 is larger than 75 degrees, enough travel is provided for the shock absorber 341 in the ascending or descending process of the frame, enough space is reserved for the air spring 33, and interference with other components after the air spring 33 is expanded is avoided.

The suspension system 3 further comprises a pull rod assembly 35, wherein the pull rod assembly 35 comprises two diagonal draw rods 351 and two horizontal draw rods 352, and both ends of the diagonal draw rods 351 and the horizontal draw rods 352 are provided with external threads and are matched with ball bearings 353; the two diagonal draw bars 351 are symmetrically arranged left and right and extend outwards obliquely to be crossed, the inner end and the outer end of each diagonal draw bar 351 are respectively fixedly provided with a first fixing plate 3511 and a first double-lug base 3512 through ball bearings 353, and the first double-lug base 3512 is fixedly provided with a first double-lug base fixing plate 3513; the horizontal pull rod 352 is axially arranged along the frame system 1, the inner end of the horizontal pull rod 352 is connected with the axle 31, the inner end and the outer end of the horizontal pull rod 352 are fixedly provided with a second double-lug base through a ball bearing 353, the second double-lug base is fixedly provided with a second double-lug base fixing plate 3521, and the first double-lug base fixing plate 3513 and the second double-lug base fixing plate 3521 are fixedly connected with the frame system 1. The suspension system moves in a vertical plane under the action of the resultant force of the two pairs of pull rod V-shaped four-bar links on the axle 31 and the frame system 1.

Example 5

As in embodiment 1, except that the vehicle frame system further comprises a height sensor fixing seat 51, a first height sensor connecting rod 52, a second height sensor connecting rod 53 and a connecting rod fixing seat 54, the height sensor 5 is fixed on the vehicle frame system 1 through the height sensor fixing seat 51, one end of the first height sensor connecting rod 52 is connected with the rotating shaft of the height sensor 5, the other end of the first height sensor connecting rod 52 is connected with the upper end of the vertically placed second height sensor connecting rod 53, the lower end of the second height sensor connecting rod 53 is fixed on the vehicle axle 31 through the connecting rod fixing seat 54, therefore, when the vehicle axle 31 and the vehicle frame relatively move, the first height sensor connecting rod 52 is pushed by the second height sensor connecting rod 53 to make a rotating motion centering on the rotating shaft of the height sensor 5, an angle value formed through rotation is converted into an inductance change value, then the electric control signal is converted into an electric control signal through a conditioning circuit, the height difference value of the vehicle axle 31 and the vehicle frame is then obtained, the position sensor fixing seat 5 is convenient to process the position sensor fixing seat.

Example 6

The embodiment 1 is the same, except that the lifting mechanism 6 of the lifting bridge is further included, the lifting mechanism 6 of the lifting bridge comprises a lifting guide assembly 61, a lifting arm 62, a guide rod 63 and a traction rope 64 which are formed by building aluminum profiles, the upper part of the air spring 33 is fixedly connected with the lifting arm 62 through a first air spring fixing plate 331 and a second air spring fixing plate 332, a vertically arranged guide rod 63 is fixed on the lifting arm 62 through a profile connecting piece, the lifting guide assembly 61 is of a groined structure, the guide rod 63 is matched with the lifting guide assembly 61 to ensure that the air spring 33 moves vertically to a frame without deflection when being inflated and deflated, meanwhile, two ends of the lifting arm 62 are respectively hung with one traction rope 64, the lower end of each traction rope 64 is directly sleeved on an axle 31, when the lifting mechanism 6 of the lifting bridge receives a lifting signal sent by a controller, the air spring 33 is inflated, the guide rod 63 moves upwards along the guide mechanism 61, the lifting arm 62 moves upwards, meanwhile, the traction rope 64 and the axle 31 connected with the lifting mechanism is lifted upwards, the lifting function of the lifting bridge is completed, and when the lifting mechanism 6 receives the action of gravity force of the lifting signal, the air spring 33 is lowered, and the air spring 33 is inflated and the function is lowered, and the lifting system is enabled to move downwards.

Example 7

The same as the embodiment 1, except that the controller 7 is further included, the controller 7 includes a road surface simulation control unit 71 and an electric control air suspension ECU72, the road surface simulation control unit 71 is connected with the road surface simulation lifting device 2 and controls the operation thereof, the electric control air suspension ECU72 is connected with an electromagnetic valve and controls the lifting bridge lifting mechanism 6 to operate through the electromagnetic valve, the road surface simulation lifting device 2 and the lifting bridge lifting mechanism 6 drive the suspension system 3 to move, and the pressure sensor 4 and the height sensor 5 on the suspension system 3 send sensor signals to the electric control air suspension ECU72.

The bench function test controller 7 mainly controls and adjusts the pavement simulation lifting device 2 and the electric control air suspension system through signal transmission. The electric control air suspension system 3 consists of an air suspension executing assembly and a control assembly, wherein the air suspension executing assembly comprises an air compressor, a one-way valve, an electromagnetic valve, an overflow valve and an air path pipeline; the electric control air suspension control assembly consists of an electric control suspension controller ECU, a remote controller, a display, a key switch and a detection unit (a vehicle body height sensor and a pressure sensor). The electric control suspension system feeds back the angle and pressure signals to the controller in real time through the height sensor arranged on the axle and the pressure sensor arranged on the air spring, the controller compares the data with the target value in the control strategy in real time according to the vehicle condition, and sends control commands to the electromagnetic valve according to the comparison result to realize the ascending, descending and maintaining functions of the vehicle frame.

Claims

1. A functional test rack system for automatically controlled air suspension system of commercial car, its characterized in that: the vehicle frame system comprises a vehicle frame system (1) and a road surface simulation system, wherein the vehicle frame system (1) comprises a plurality of vehicle frame rods (11) and balancing weights (12) which are fixedly arranged on the vehicle frame rods (11), the vehicle frame system further comprises a suspension system (3), the suspension system (3) is arranged on the vehicle frame system (1), the suspension system (3) comprises an axle (31) and wheels (32) and air springs (33) which are arranged on the axle (31), the road surface simulation system comprises a plurality of road surface simulation lifting devices (2), the wheels (32) are arranged on the road surface simulation lifting devices (2), pressure sensors (4) are arranged on the air springs (33), and height sensors (5) are arranged on the axle (31).

2. A functional test bench system for an electrically controlled air suspension system of a commercial vehicle according to claim 1, wherein: the road surface simulation lifting devices (2) are multiple and are matched with the wheels (32) one by one, and the road surface simulation lifting devices (2) comprise lifting trays (21), lifting rods (22) and lifting bases (23); the lifting base (23) is fixed on the ground, one end of the lifting rod (22) is arranged on the lifting base (23), the other end of the lifting rod (22) is connected with the lifting tray (21) and drives the lifting tray (21) to move up and down, and the wheels (32) are matched with the lifting tray (21) and are placed on the lifting tray (21).

3. A functional test bench system for an electrically controlled air suspension system of a commercial vehicle as claimed in claim 2 wherein: the road surface simulation lifting device (2) further comprises a guide assembly (24), the guide assembly (24) comprises a guide rod and a ball type linear bearing, the bottom of the ball type linear bearing is connected with the lifting base (23) and is vertically arranged, the upper end of the guide rod is fixedly connected with the lifting tray (21), and the lower end of the guide rod is inserted into the ball type linear bearing and matched with the ball type linear bearing.

4. A functional test bench system for an electrically controlled air suspension system of a commercial vehicle according to claim 1, wherein: the frame rod (11) comprises a plurality of main supporting rods (111) and connecting rods (112), the connecting rods (112) are connected with each other to form a head, a connecting section and a carriage, the plurality of main supporting rods (111) are horizontally paved in the lower part of a frame formed by the connecting rods in parallel, and the balancing weights (12) are fixedly arranged on the main supporting rods (111).

5. A functional test bench system for an electrically controlled air suspension system of a commercial vehicle according to claim 1, wherein: an air spring base (333), a first air spring fixing plate (331) and a second air spring fixing plate (332) are arranged on the air spring (33), the air spring (33) is fixedly arranged on the axle (31) through the air spring base (333), and the first air spring fixing plate (331) and the second air spring fixing plate (332) are fixedly arranged on the upper surface of the air spring (33) and fixedly connected with the main supporting rod (111).

6. A functional test bench system for an electrically controlled air suspension system of a commercial vehicle as claimed in claim 5 wherein: the suspension system (3) further comprises a damping component (34), the damping component (34) comprises a damper (341), a first damping double-lug base (342), a second damping double-lug base (343) and a damper fixing plate (344), two ends of the damper (341) are respectively fixed on the air spring base (333) and the frame system (1) through the first damping double-lug base (342) and the second damping double-lug base (343), and an included angle formed between the damper (341) and a chassis surface of the frame system (1) is larger than 75 degrees.

7. A functional test bench system for an electrically controlled air suspension system of a commercial vehicle according to claim 1, wherein: the suspension system (3) further comprises a pull rod assembly (35), the pull rod assembly (35) comprises two diagonal pull rods (351) and two horizontal pull rods (352), and both ends of the diagonal pull rods (351) and the horizontal pull rods (352) are provided with external threads and are matched with ball bearings (353); the two diagonal draw bars (351) are symmetrically arranged left and right and extend outwards obliquely, a first fixing plate (3511) and a first double-lug base (3512) are respectively fixedly arranged at the inner end and the outer end of each diagonal draw bar (351) through ball bearings (353), and a first double-lug base fixing plate (3513) is fixedly arranged on each first double-lug base (3512); the horizontal pull rod (352) is axially arranged along the frame system (1), the inner end of the horizontal pull rod (352) is connected with the axle (31), the inner end and the outer end of the horizontal pull rod (352) are fixedly provided with second double-lug bases through ball bearings (353), the second double-lug bases are fixedly provided with second double-lug base fixing plates (3521), and the first double-lug base fixing plates (3513) and the second double-lug base fixing plates (3521) are fixedly connected with the frame system (1).

8. A functional test bench system for an electrically controlled air suspension system of a commercial vehicle according to claim 1, wherein: still include altitude sensor fixing base (51), first altitude sensor connecting rod (52) and second altitude sensor connecting rod (53) and connecting rod fixing base (54), altitude sensor (5) will be fixed on frame system (1) through altitude sensor fixing base (51), first altitude sensor connecting rod (52) one end is connected with the rotation axis of altitude sensor (5), the upper end of vertical second altitude sensor connecting rod (53) of placing is connected to the other end of first altitude sensor connecting rod (52), the lower extreme of second altitude sensor connecting rod (53) will be fixed in on axletree (31) through connecting rod fixing base (54).

9. A functional test bench system for an electrically controlled air suspension system of a commercial vehicle as claimed in claim 5 wherein: still including lifting bridge lifting mechanism (6), lifting bridge lifting mechanism (6) are including lifting guide assembly (61), lift arm (62), guide bar (63) and haulage rope (64), air spring (33) top is through first air spring fixed plate (331) and second air spring fixed plate (332) and lift arm (62) rigid coupling, be fixed with guide bar (63) of vertical setting through the section bar connecting piece on lift arm (62), lift guide assembly (61) are groined type structure, guide bar (63) cooperate with lifting guide assembly (61), lift arm (62) both ends have respectively hung one haulage rope (64), haulage rope (64) lower extreme cover is established on axletree (31).

10. A functional test bench system for an electrically controlled air suspension system of a commercial vehicle as claimed in claim 9 wherein: the intelligent air suspension system comprises a road surface simulation lifting device (2), and is characterized by further comprising a controller (7), wherein the controller (7) comprises a road surface simulation control unit (71) and an electric control air suspension ECU (72), the road surface simulation control unit (71) is connected with the road surface simulation lifting device (2) and controls the road surface simulation lifting device to work, the electric control air suspension ECU (72) is connected with an electromagnetic valve and controls a lifting bridge lifting mechanism (6) to work through the electromagnetic valve, the road surface simulation lifting device (2) and the lifting bridge lifting mechanism (6) drive a suspension system (3) to move, and a pressure sensor (4) and a height sensor (5) on the suspension system (3) send sensor signals to the electric control air suspension ECU (72).