Four-wheel-drive four-motor rack whole vehicle environment cabin and control system thereof

Abstract

The invention relates to a four-wheel-drive four-motor rack whole vehicle environment cabin which comprises a cabin body, a fresh air handling unit is arranged at one end of the outer top face of the cabin body, and the fresh air handling unit is communicated with the interior of the cabin body through an air inlet pipe matched with the fresh air handling unit; an air treatment box is arranged at the other end of the outer top surface of the cabin body, an air outlet of the air treatment box is communicated with an air feeder box arranged above the front part in the cabin body in series through a pipeline, and an air inlet of the air treatment box is communicated with flow guide air ducts oppositely arranged on two sides below the rear part in the cabin body in parallel through pipelines; exhaust fans are arranged on the parallel pipelines on the outer top surface of the cabin body in a communicating manner; a head-on fan is arranged on the bottom surface of the front part in the cabin body along the long axis of the cabin body, and the head-on fan is supported by a lifting bracket matched with the head-on fan; and a full-spectrum irradiation system with an adjustable illumination angle is suspended on the inner top surface of the cabin body. According to the invention, high-precision temperature field uniformity is realized, and the problem of temperature and humidity layering of traditional equipment is solved; the full-spectrum irradiation system supports inclination angle adjustment and is matched with full-spectrum coverage to simulate a real sunlight environment.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile environmental test chambers, and in particular relates to a four-wheel drive four-motor test bench vehicle environmental chamber and a control system thereof. Background Art

[0002] At present, the new energy four-wheel drive four-motor bench vehicle environmental test chamber is an advanced experimental equipment specially used to test and optimize the thermal management system of new energy vehicles (especially electric vehicles driven by four-wheel hub motors). Its core function is to verify the reliability, efficiency and adaptability of the vehicle thermal management system by simulating extreme environmental conditions and complex working conditions. It supports the whole vehicle test driven by four-wheel hub motors, simulates the complex working conditions of four-wheel independent drive (such as high-performance electric vehicles, off-road vehicles or special vehicles), and evaluates the temperature rise and heat dissipation performance of the hub motor under high load, frequent start and stop or extreme torque.

[0003] However, the existing environmental test chamber is usually unable to complete the air processing cycle in the four-motor-driven vehicle test, and cannot achieve temperature and humidity control in the cabin. At the same time, the conventional full-spectrum irradiation system has the defect of limited angle adjustment, which makes it difficult to simulate the impact of real sunlight environment on vehicle thermal management. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a four-wheel drive four-motor test bench vehicle environmental chamber and its control system. The specific technical scheme is as follows:

[0005] The present invention provides a four-wheel drive four-motor test bench whole vehicle environmental chamber, comprising a chamber body, one end face of which is provided with a chamber door which can be opened and closed, and an inner bottom face of which is provided with two pairs of test machines in a rectangular distribution, a fresh air unit is provided at one end of the outer top face of the chamber body, and the fresh air unit is connected with the interior of the chamber body through an air inlet pipe which is compatible with it; an air treatment box is provided at the other end of the outer top face, and an air outlet of the air treatment box is connected in series with an air supply box arranged at the upper front part of the chamber body through a pipeline, and an air inlet of the air treatment box is connected in parallel with guide air ducts arranged at both sides of the lower rear part of the chamber body through pipelines, and exhaust fans are connected on the parallel pipelines located on the outer top face of the chamber body; a head-on fan is provided on the bottom face of the front part of the chamber body along its long axis, and the head-on fan is supported by a lifting bracket which is compatible with it; a full-spectrum irradiation system with adjustable light angle is suspended on the inner top face of the chamber body.

[0006] As a preferred technical solution of the present invention, the full-spectrum irradiation system includes a plurality of suspension rods, which are cross-connected vertically and horizontally to form a rectangular grid shape, and a suspension rod is vertically connected to the top surface of each intersection point and is fixedly connected to the inner top surface of the cabin; a plurality of full-spectrum lamps are suspended in a straight line at equal intervals directly below the suspension rods in the long side direction, and the upper part of the shell end surface of the full-spectrum lamp is pivotally connected to a hanging bracket in an inverted U-shaped structure vertically fixed to the bottom surface of the corresponding suspension rod; a plurality of full-spectrum lamps located below the same suspension rod are synchronously positioned and rotated left and right within an acute angle range through an angle adjustment mechanism provided on the top surface of the suspension rod.

[0007] As a preferred technical solution of the present invention, the angle adjustment mechanism includes a long rotating shaft, which vertically rotates through a plurality of suspension rods on the corresponding suspension rod, and one end of the long rotating shaft is rotatably connected with a bearing seat, and the other end is axially driven and connected with a servo motor; hanging ears are vertically and symmetrically fixedly connected to the upper parts of the side surfaces of the shells of the full-spectrum lamps, and a long connecting rod is fixedly connected through the plurality of hanging ears on the same side; transmission gears axially fixed and connected to the end parts of the long rotating shaft are located in the same vertical plane as the corresponding hanging ears at the head and tail, an open-type transmission rack is meshed and hung on the transmission gear, tongue rods are respectively connected to the end parts of the transmission rack, and the bottom ends of the tongue rods are respectively pivotally connected to U-shaped tongue seats fixedly connected to the outer sides of the top surfaces of the corresponding hanging ears; a U-shaped limiting frame is reversely buckled outside the transmission gear at a gap, and both side surfaces of the limiting frame are rotatably connected with the long rotating shaft.

[0008] As a preferred technical solution of the present invention, L-shaped protective covers adapted to their sizes are slidably arranged along the short side direction of the cabin on the four testing machines, and a directional fire extinguishing mechanism for automatically extinguishing the corresponding hub motors of the test vehicles on the testing machines is arranged along the center line on the top surfaces of the horizontal parts of each protective cover.

[0009] The directional fire extinguishing mechanism includes a fixed support assembly arranged on the top surface of the horizontal part of the corresponding protective cover, a fire extinguishing assembly with an internal extinguishing agent is installed on the fixed support assembly, and the extinguishing agent is in a liquid state at normal temperature; the fire extinguishing assembly is automatically opened by a temperature control component extending forward on the top surface of the vertical part of the protective cover to sense the flame temperature and sprays the extinguishing agent through the vertical part of the protective cover.

[0010] As a preferred technical solution of the present invention, the fire extinguishing assembly includes a cylinder body horizontally fixed on the top of the fixed support assembly. The cylinder body is a non-pressurized circular structure with one end open and the other end closed. A spray head is vertically connected in the middle of the closed end. A diaphragm is sealed at the inner port of the spray head. The spray head passes through a long hole longitudinally opened on the vertical center line of the vertical part of the protection cover plate at an interval; the cylinder body is divided into two chambers by a partition axially arranged in the middle. A push airbag is axially sealed and fitted on the vertical surface of the partition of the front chamber, and a storage and delivery airbag is axially sealed and fitted on the vertical surface of the partition of the rear chamber. The storage and delivery airbag is communicated with the push airbag through a through hole axially opened in the middle of the partition; the front chamber of the cylinder body is filled with the fire extinguishing agent through a filling port opened on the top of the cylinder body. An electric push rod with a built-in series charging battery is axially suspended in the middle of the port of the rear chamber. The electric push rod is fixedly clamped with a cross on the opening end of the cylinder body; the outer end surface of the storage and delivery airbag is axially connected with a piston plate, and the piston plate is axially slidably attached to the inner wall of the cylinder body; the power output end of the electric push rod is vertically connected with the piston plate.

[0011] As a preferred technical solution of the present invention, the temperature control assembly includes an insulating hard pipe horizontally fixed to the middle of the top surface of the corresponding vertical part of the protection cover plate. The rear port of the insulating hard pipe is axially connected with a socket. Radially symmetric jacks are opened on the inner vertical surface of the socket. The two jacks are respectively connected in series with the electric push rod and its charging battery through wires adapted to them; the front port is axially butted with a temperature sensing cylinder, and the front end of the temperature sensing cylinder is close to the corresponding wheel hub of the test vehicle; a memory alloy spring that can be heated and elongated is axially connected to the inner front end of the temperature sensing cylinder. The rear end of the memory alloy spring is axially connected with an insulating circular plate. An insulating guide rod axially passes through the middle of the insulating circular plate at an interval. One end of the insulating guide rod is connected to the inner vertical surface of the socket, and the other end is connected to the inner front end of the temperature sensing cylinder; a U-shaped conductive sheet is fixedly attached to the front end surface of the insulating circular plate. Guide insertion columns are respectively radially and vertically symmetrically connected to the end parts of the conductive sheet. The guide insertion columns can be correspondingly inserted and fitted with the jacks of the socket to connect the power supply circuit of the electric push rod.

[0012] As a preferred technical solution of the present invention, the fixed support assembly includes a horizontally arranged support table. Guide rods are respectively vertically and symmetrically passed through the four corners of the support table at an interval. The bottom ends of the guide rods are fixedly connected to the top surface of the horizontal part of the corresponding protection cover plate. Support springs are axially sleeved on the guide rods. The bottom ends of the support springs are connected to the protection cover plate, and the top ends are connected to the support table; a U-shaped seat is vertically connected to the middle of the bottom surface of the support table. A support screw rod is passed through the middle of the U-shaped seat at an interval. The bottom end of the support screw rod is fixedly connected to the top surface of the horizontal part of the protection cover plate. The U-shaped seat is clamped and connected up and down by two positioning nuts axially screwed on the support screw rod; the cylinder body of the fire extinguishing assembly is horizontally fixedly connected to the top surface of the support table.

[0013] As a preferred technical solution of the present invention, an arc-shaped groove is formed through the middle of the top surface of the support platform, and the lower part of the cylinder body is clamped and matched with the arc-shaped groove; the upper part of the cylinder body is radially clamped and matched with an "Ω"-shaped clamp, and the bottom end of the clamp is fixedly connected to the support platform by bolts; the rear end surface of the clamp is radially and vertically symmetrically connected with L-shaped claws, the open end of the cylinder body abuts against the horizontal part of the claws, and the closed end thereof abuts against the inner vertical surface of the vertical part of the protective cover plate.

[0014] As a preferred technical solution of the present invention, straight grooves are symmetrically arranged on both ends of the pit of the testing machine, straight rods are symmetrically arranged at both ends of the bottom surface of the protective cover plate, and the straight rods are horizontally slidably clamped and matched with the corresponding straight grooves;

[0015] A convex platform is vertically connected to the outer end of the horizontal part of the protective cover plate, and a locking screw rod is vertically and gap-passed through the convex platform. When the straight rod slides to the outer end of the straight groove, the locking screw rod is axially screwed and fixed with a screw hole correspondingly opened on the bottom surface of the cabin body.

[0016] The present invention provides a four-wheel drive and four-motor bench whole vehicle environmental chamber control system, including the four-wheel drive and four-motor bench whole vehicle environmental chamber as described above; the control system is used to collect and control the temperature and humidity data of the air in the chamber; the PLC controller installed in the control system collects and processes the temperature and humidity data in the chamber through sensors and sends them to the upper computer interface to realize real-time supervision by users.

[0017] The beneficial effects of the present invention are as follows:

[0018] The fresh air unit in the environmental chamber of the present invention compensates the humidity of the air in the chamber through the air inlet pipe. The air treatment box extracts the waste gas at the rear of the chamber through the diversion air duct, and after treatment, forms a laminar air supply through the top air supply fan box. Cooperating with the negative pressure suction of the exhaust fan, a three-dimensional air flow cycle of front-up and rear-down is formed to achieve high-precision temperature field uniformity and solve the problem of temperature and humidity stratification of traditional equipment.

[0019] The oncoming fan driven by the lifting bracket can adjust the height and inclination angle along the long axis of the chamber body. Combining with the longitudinal air supply of the air supply fan box, an equivalent dynamic wind field of vehicle speed within a certain range is constructed to accurately simulate the convective heat dissipation boundary conditions of the four in-wheel motors when the vehicle is running.

[0020] The suspended full-spectrum irradiation system supports inclination angle adjustment in the range of 0-90°. Combining with full-spectrum coverage, it accurately reproduces the solar radiation heat loads at different latitudes and time periods, especially for the local heat accumulation at the rim part of the in-wheel motor for enhanced testing.

[0021] The diversion air duct below the rear part of the chamber body and the top exhaust fan form a Venturi effect, quickly discharging the high-temperature waste gas generated by the in-wheel motor test, avoiding the accumulation of hot air at the top of the chamber, effectively controlling the pollutant concentration in the chamber, and ensuring the stability of long-term test data. Brief Description of the Drawings

[0022] Figure 1 Shows the overall structural schematic diagram of the four-wheel drive and four-motor vehicle environment chamber of the present invention;

[0023] Figure 2 Shows the structural schematic diagram of the full-spectrum irradiation system in the present invention;

[0024] Figure 3 Shows Figure 2 The enlarged structural view of part A in;

[0025] Figure 4 Shows the structural schematic diagram of the directional fire extinguishing mechanism and the corresponding cover plate assembly in the present invention;

[0026] Figure 5 Shows the three-dimensional structural schematic diagram of the fixed support assembly and the cover plate assembly in the present invention;

[0027] Figure 6 Shows the main view of the structure of the fixed support assembly and the cover plate assembly in the present invention;

[0028] Figure 7 Shows the three-dimensional structural schematic diagram of the fire extinguishing assembly and the temperature control assembly in the present invention;

[0029] Figure 8 Shows the top view of the structure of the fire extinguishing assembly in the present invention;

[0030] Figure 9 Shows Figure 8 The structural sectional view in the A-A direction in;

[0031] Figure 10 Shows the internal structural schematic diagram of the temperature control assembly in the present invention;

[0032] Figure 11 Shows Figure 10 The enlarged structural view of part B in;

[0033] Figure 12 Shows the working demonstration diagram of the four-wheel drive and four-motor vehicle environment chamber of the present invention;

[0034] Figure 13 Shows the partial three-dimensional structural schematic diagram of the fire extinguishing assembly in the present invention;

[0035] Figure 14 Shows Figure 13 The enlarged structural view of part C in;

[0036] Figure 15 Shows Figure 13 The structural sectional view of the fire extinguishing assembly in.

[0037] As shown in the figure: 1. Cabin body; 11. Cabin door; 2. Testing machine; 21. Straight groove; 3. Fresh air unit; 31. Air inlet pipe; 4. Oncoming air fan; 41. Lifting bracket; 5. Diversion air duct; 51. Exhaust fan; 6. Air treatment box; 61. Air supply fan box; 7. Full-spectrum irradiation system; 71. Suspension rod; 72. Suspension rod; 73. Full-spectrum lamp; 731. Hanging bracket; 74. Angle adjustment mechanism; 741. Long rotating shaft; 742. Bearing seat; 743. Servo motor; 744. Hanging ear; 7441. Tongue seat; 745. Long connecting rod; 746. Driving gear; 7461. Limit frame; 747. Driving rack; 7471. Tongue rod; 8. Protective cover plate; 81. Straight rod; 82. Long strip hole; 83. Boss; 831. Locking screw; 9. Directional fire extinguishing mechanism; 91. Fixed support component; 911. Support platform; 9111. Arc groove; 912. Clamp; 9121. Claw; 913. Guide rod; 914. Support spring; 915. U-shaped seat; 916. Support screw; 9161. Positioning nut; 92. Fire extinguishing component; 921. Cylinder body; 9211. Cross; 9212. Filling port; 9213. Partition board; 9214. Through hole; 922. Sprinkler head; 9221. Diaphragm; 9222. Spray hole; 923. Electric push rod; 9231. Rechargeable battery; 924. Push pressure air bag; 925. Storage and delivery air bag; 9251. Piston plate; 926. Fire extinguishing agent; 927. Diversion component; 9271. Prick rod; 9272. Circular block; 9273. Telescopic spring; 9274. Diversion plate; 9275. Connecting rod; 93. Temperature control component; 931. Insulating hard pipe; 932. Socket; 9321. Conducting wire; 933. Temperature sensing cylinder; 934. Insulating guide rod; 935. Shape memory alloy spring; 936. Insulating circular plate; 9361. Conductive sheet; 9362. Conductive plug column; 10. Test vehicle. Specific implementation mode

[0038] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] Embodiment 1

[0040] To solve the technical problems in the background art, the following four-wheel drive four-motor bench vehicle environment cabin and its control system are provided:

[0041] Combined with Figure 1 and Figure 12As shown in the figure, a four-wheel drive and four-motor bench vehicle environment chamber includes a chamber body 1. One end face of the chamber body 1 is provided with a door 11 that can be opened and closed. Two pairs of test machines 2 are buried in a rectangular distribution on the inner bottom surface of the chamber body 1. One end of the outer top surface of the chamber body 1 is provided with a fresh air unit 3, and the fresh air unit 3 is connected to the inside of the chamber body 1 through an air inlet pipe 31 adapted to it; the other end of the outer top surface is provided with an air treatment box 6. The air outlet of the air treatment box 6 is connected in series through a pipeline with a blower box 61 arranged above the front part inside the chamber body 1. Its air inlet is connected in parallel through pipelines with diversion air ducts 5 arranged on both sides below the rear part inside the chamber body 1, and exhaust fans 51 are connected and arranged on the parallel pipelines located on the outer top surface of the chamber body 1; along the long axis of the inner front bottom surface of the chamber body 1, a head-on fan 4 is provided, and the head-on fan 4 is supported by a lifting bracket 41 adapted to it; a full-spectrum irradiation system 7 with adjustable illumination angle is suspended on the inner top surface of the chamber body 1.

[0042] By adopting the above technical solutions, the fresh air unit 3 in the environment chamber compensates the humidity of the air in the chamber through the air inlet pipe 31. The air treatment box 6 extracts the waste gas at the rear part inside the chamber through the diversion air duct 5, and after treatment, forms a laminar air supply through the top blower box 61. With the negative pressure suction of the exhaust fan 51, a three-dimensional air flow circulation of front-up and rear-down is formed, realizing high-precision temperature field uniformity and solving the problem of temperature and humidity stratification of traditional equipment.

[0043] The head-on fan 4 driven by the lifting bracket 41 can adjust the height and inclination angle along the long axis of the chamber body 1. Combined with the longitudinal air supply of the blower box 61, an equivalent dynamic wind field of vehicle speed within a certain range is constructed to accurately simulate the convective heat dissipation boundary conditions of the four in-wheel motors when the vehicle is running.

[0044] The suspended full-spectrum irradiation system 7 supports inclination angle adjustment in the range of 0 - 90°. Combined with full-spectrum coverage, it accurately reproduces the solar radiation heat loads at different latitudes and time periods, especially for strengthening the test of local heat accumulation at the rim part of the in-wheel motor.

[0045] The diversion air duct 5 below the rear part inside the chamber body 1 and the top exhaust fan 51 form a Venturi effect, quickly discharging the high-temperature waste gas generated by the in-wheel motor test, avoiding the accumulation of hot air at the top inside the chamber, effectively controlling the pollutant concentration inside the chamber body 1, and ensuring the stability of long-term test data.

[0046] Specifically, the fresh air unit 3 in the environment chamber conveys a fresh air flow with controllable temperature and humidity into the chamber body 1 through the air inlet pipe 31. The air flow is guided by the head-on fan 4 at the front part inside the chamber body 1, blows over the test vehicle 10, and enters the inlet of the diversion air duct 5 at the rear part inside the chamber body 1; the air flow passes through the diversion air duct 5 and is blown into the air treatment box 6 under the drainage of the exhaust fan 51. After being processed by the air treatment box 6, the air flow is evenly blown into the chamber body 1 by the blower box 61, thus completing an air treatment cycle and realizing the temperature and humidity control inside the chamber body 1.

[0047] Example 2

[0048] Combined with Figures 1 to 3 and Figure 12 As shown, on the basis of the above embodiments, the following content is further given in this embodiment:

[0049] In this embodiment, as Figures 1 to 3 and Figure 12 shown, the full-spectrum irradiation system 7 includes a plurality of suspension rods 71, which are cross-connected in a rectangular grid pattern, and a suspension rod 72 vertically connected to the inner top surface of the cabin 1 is fixedly connected to the top surface of each intersection point; a plurality of full-spectrum lamps 73 are suspended in a straight line at equal intervals directly below the suspension rods 71 in the long side direction, and the upper part of the housing end surface of the full-spectrum lamp 73 is pivotally connected to a hanging bracket 731 vertically fixed to the bottom surface of the corresponding suspension rod 71 and having an inverted U-shaped structure; a plurality of full-spectrum lamps 73 located below the same suspension rod 71 are synchronously positioned and rotated left and right within an acute angle range through an angle adjustment mechanism 74 provided on the top surface of the suspension rod 71.

[0050] By adopting the above technical solution, the rectangular grid frame formed by the intersection of the suspension rods 71, combined with the top fixing structure of the suspension rod 72, forms a rigid support system against vibration; the full-spectrum lamps 73 arranged at equal intervals below each suspension rod form an independent suspension unit through the pivotal connection of the hanging bracket 731, and in combination with the angle adjustment mechanism 74, the full-spectrum lamps 73 can be steplessly adjusted within the range of 0-90°, and the solar altitude angle change in different latitude regions can be accurately reproduced, and the coverage area is improved compared with the traditional system.

[0051] A plurality of full-spectrum lamps 73 under the same suspension rod 71 are synchronously deflected in the same row through the angle adjustment mechanism 74 to ensure the consistency of the incident angle at each test site; combined with the vertical and horizontal layout of the grid frame, a gradient irradiation mode can be formed to meet the thermal shock test requirements of special-shaped components such as vehicle wheel hub motors and battery packs under moving light.

[0052] As Figure 2 and Figure 3As shown, the angle adjustment mechanism 74 includes a long rotating shaft 741, which vertically rotates through a plurality of suspension rods 72 on the corresponding suspension rod 71. One end of the long rotating shaft 741 is rotatably connected with a bearing seat 742, and the other end is axially driven and connected with a servo motor 743. On the side surface of the housing of the full-spectrum lamp 73, hanging ears 744 are vertically and symmetrically fixed respectively, and a long connecting rod 745 is fixedly penetrated between a plurality of hanging ears 744 on the same side. The end parts of the long rotating shaft 741 are axially fixedly penetrated with transmission gears 746 which are in the same vertical plane as the corresponding hanging ears 744 at the head and tail. An open-type transmission rack 747 is meshed and hung on the transmission gear 746. The end parts of the transmission rack 747 are respectively connected with tongue rods 7471, and the bottom ends of the tongue rods 7471 are respectively pivotally connected with U-shaped tongue seats 7441 fixedly connected to the outer sides of the top surfaces of the corresponding hanging ears 744. A U-shaped limiting frame 7461 is reversely buckled outside the transmission gear 746 with a gap, and both side surfaces of the limiting frame 7461 are rotatably penetrated with the long rotating shaft 741.

[0053] By adopting the above technical solution, the servo motor 743 is used to drive the long rotating shaft 741, and in cooperation with the meshing transmission of the transmission gear 746 and the open-type transmission rack 747, the rotational motion is converted into linear displacement, realizing precise adjustment of the angle of a single lamp. The gap design between the limiting frame 7461 and the outside of the transmission gear 746 not only eliminates the axial displacement of the transmission gear 746 but also avoids frictional loss, ensuring the angle repetitive positioning accuracy after high-frequency cycling.

[0054] A plurality of full-spectrum lamps 73 below the suspension rod 71 are rigidly connected through the hanging ears 744 and the long connecting rod 745 to form a mechanical synchronization unit. When the long rotating shaft 741 rotates, the transmission rack 747 drives the tongue rod 7471 to pivot in the tongue seat 7441, forcing all the hanging ears 744 to deflect synchronously. This mechanical hard connection method eliminates the angle deviation of each lamp compared with the traditional independent control mode of electric push rods, and is especially suitable for dynamic test scenarios that simulate the continuous change of the sunlight angle during the movement of a vehicle.

[0055] Embodiment 3

[0056] Combined with Figure 1 and Figures 4 to 11 As shown, on the basis of the above embodiment, the following content is further given in this embodiment:

[0057] In this embodiment, as Figure 1 and Figure 4 shown, on each of the four testing machines 2, an L-shaped protective cover plate 8 adapted to its size is slidably arranged along the short side direction of the cabin body 1. On the top surface of the horizontal part of each protective cover plate 8, a directional fire extinguishing mechanism 9 for automatically extinguishing the corresponding hub motor of the test vehicle 10 on the testing machine 2 is arranged along its midline.

[0058] The directional fire extinguishing mechanism 9 includes a fixed support component 91 disposed on the top surface of the horizontal portion of the corresponding protective cover plate 8. An extinguishing component 92 containing a fire extinguishing agent 926 is installed on the fixed support component 91, and the fire extinguishing agent 926 is in a liquid state at normal temperature. The extinguishing component 92 is automatically activated by a temperature control component 93 extending forwardly on the top surface of the vertical portion of the protective cover plate 8 to sense the flame temperature and sprays the fire extinguishing agent 926 through the vertical portion of the protective cover plate 8.

[0059] By adopting the above technical solution, the provided protective cover plate 8 slides along the short side direction of the cabin body. Its horizontal portion is used to cover the testing machine 2 when not in operation, and its vertical portion forms a protective spacing with the side surface of the in-wheel motor.

[0060] The provided directional fire extinguishing mechanism 9 is for timely and directional handling of the accidental ignition of the in-wheel motor under extreme operating conditions during the new energy vehicle test driven by four in-wheel motors in the environmental chamber. When the temperature control component 93 detects the flame temperature of the in-wheel motor, the extinguishing component 92 is automatically activated to aim at the fire source point, and the fire extinguishing agent 926 (for example: an environmentally friendly, efficient, and safe perfluoromethylcyclohexane fire extinguishing agent can be selected, which leaves no trace after volatilization and effectively protects the in-wheel motor) in a liquid state at normal temperature is sprayed at a high speed and precisely to the braking disc part of the in-wheel motor. The fire extinguishing response time is greatly shortened compared with the traditional top-spray fire extinguishing system installed on the inner top surface of the cabin body 1. The occupied area of this fire extinguishing solution is effectively reduced compared with the traditional solution, especially suitable for independent fire extinguishing operations in the differential fault scenarios of four in-wheel motors.

[0061] As Figure 1 、 Figures 4 to 6 shown, straight grooves 21 are symmetrically provided at both ends of the pit of the testing machine 2, and straight rods 81 are symmetrically provided at both ends of the bottom surface of the protective cover plate 8. The straight rods 81 are horizontally slidably engaged and clamped with the corresponding straight grooves 21.

[0062] A boss 83 is vertically connected to the outer end of the horizontal portion of the protective cover plate 8. A locking screw 831 vertically passes through a gap in the boss 83. When the straight rod 81 slides to the outer end of the straight groove 21, the locking screw 831 is axially screwed and fixed with a screw hole correspondingly provided on the inner bottom surface of the cabin body 1.

[0063] By adopting the above technical solution, the provided straight rod 81 and the straight groove 21 form a linear sliding fit, enabling the protective cover plate 8 to achieve stroke adjustment along the short side direction of the cabin body. When the straight rod slides to the end of the straight groove, the positioning reference surface of the boss 83 contacts the inner bottom surface of the cabin body, and with the axial locking of the locking screw 831 and the screw hole of the cabin body, the protective cover plate 8 completely exposes the corresponding testing machine 2 and is position-locked to prevent the extinguishing component 92 from moving when spraying the fire extinguishing agent 926. This structure controls the amplitude of the protective cover plate 8 within a small range during the synchronous loading test of the four in-wheel motors, avoiding mis-triggering of the directional fire extinguishing mechanism 9 caused by the resonance of the protective cover plate 8.

[0064] As shown Figures 7 to 9 in the figure, the fire extinguishing assembly 92 includes a cylinder 921 horizontally fixed on the top of the fixed support assembly 91. The cylinder 921 is a non-pressure storage circular structure with one end open and the other end closed. A nozzle 922 is vertically connected to the middle of the closed end. A diaphragm 9221 is sealed at the inner port of the nozzle 922. The nozzle 922 passes through the long hole 82 longitudinally opened on the vertical center line of the vertical part of the protection cover plate 8 at an interval; the cylinder 921 is divided into two chambers by a partition 9213 axially arranged in the middle. A push airbag 924 is axially sealed and fitted on the vertical surface of the partition 9213 in the front chamber. A storage and delivery airbag 925 is axially sealed and fitted on the vertical surface of the partition 9213 in the rear chamber. The storage and delivery airbag 925 is connected to the push airbag 924 through a through hole 9214 axially opened in the middle of the partition 9213; the front chamber of the cylinder 921 is filled with the fire extinguishing agent 926 through a filling port 9212 opened on the top of the cylinder 921. An electric push rod 923 with a built-in series charging battery 9231 is axially suspended in the middle of the port of the rear chamber. The electric push rod 923 is fixedly clamped with a cross 9211 fixed to the opening end of the cylinder 921; an end face of the storage and delivery airbag 925 is axially connected with a piston plate 9251, and the piston plate 9251 is axially slidably attached to the inner wall of the cylinder 921; a power output end of the electric push rod 923 is vertically connected to the piston plate 9251.

[0065] By adopting the above technical solution, the fire extinguishing assembly 92 realizes rapid response and accurate fire extinguishing through a non-pressure storage type power transmission structure and an airbag linkage pressurization mechanism. The fire extinguishing agent is stored without pressure under normal conditions, which is safer.

[0066] Among them, when the electric push rod 923 extends, it rapidly pushes the piston plate 9251 to compress the storage and delivery airbag 925, so that the gas inside it continuously presses into the push airbag 924 through the through hole 9214, forming a stepped pressurization; the push airbag 924 axially extrudes the fire extinguishing agent 926 with a conical expansion structure. When the pressure breaks through the set threshold of the diaphragm 9221, the perfluoromethylcyclohexane fire extinguishing agent is atomized into micron droplets and ejected through the nozzle 922. Compared with the scheme of using an electric trigger gas generator to generate high-pressure gas to eject the fire extinguishing agent in the traditional non-pressure storage fire extinguishing device, its response speed is effectively improved.

[0067] When the electric push rod 923 retracts, the gravity extrusion of the fire extinguishing agent 926 causes the push airbag 924 to contract, and the residual gas inside it is back-pressed into the storage and delivery airbag 925, forming a gas closed-loop cycle. The energy consumption for single fire extinguishing is effectively reduced compared with the compression energy consumption required by the traditional pressure storage tank.

[0068] Preferably, the push airbag 924 and the storage and delivery airbag 925 are preferably made of three-layer composite fluorosilicone rubber, which can withstand multiple expansion and contraction cycles, so that the maintenance period is extended and the operation and maintenance cost is reduced.

[0069] Preferably, a sealed threaded connection structure is adopted between the nozzle 922 and the cylinder 921. After extinguishing the fire once, the nozzle 922 can be detached, the diaphragm 9221 can be reinstalled, and then it can be hermetically screwed with the cylinder 921; and the extinguishing agent can be refilled through the filling port 9212 on the cylinder 921, so that the fire extinguishing assembly 92 can be reused, saving costs.

[0070] The fire extinguishing assembly 92 is controlled by mechatronics, and the effective utilization rate of the extinguishing agent 926 is effectively improved compared with the traditional top-spray fire extinguishing scheme. It is especially suitable for independent and precise fire extinguishing in the case of differential faults of four-wheel hub motors, and at the same time avoids secondary pollution caused by the diffusion of a large amount of extinguishing agent to the cabin temperature and humidity control system.

[0071] As Figures 13 to 15 shown, a conical part is arranged on the end face of the nozzle 922, and a plurality of spray holes 9222 are circumferentially and equidistantly arranged on the conical surface of the conical part; a flow guiding assembly 927 for umbrella-shaped guiding spray of the extinguishing agent 926 atomized into liquid droplets is arranged on the end face of the conical part;

[0072] The flow guiding assembly 927 includes a thorn rod 9271, which axially and clearance penetrates into the nozzle 922 from the end face of the conical part. A circular block 9272 is vertically fixed at the tail end of the thorn rod 9271 in the axial direction. A telescopic spring 9273 is axially sleeved on the thorn rod 9271. One end of the telescopic spring 9273 is connected with the circular block 9272, and the other end is connected with the end face of the conical part; a flow guiding plate 9274 is arranged at the front end of each spray hole 9222, and one end of the flow guiding plate 9274 is pivotally connected with the edge of the end face of the conical part; a connecting rod 9275 is arranged between the flow guiding plate 9274 and the circular block 9272. One end of the connecting rod 9275 is pivotally connected with the inner surface of the corresponding flow guiding plate 9274, and the other end is pivotally connected with the outer peripheral surface of the circular block 9272;

[0073] The telescopic spring 9273 is divided into a natural state and a tensioned state. When in the natural state, the conical thorn part of the thorn rod 9271 abuts against the diaphragm 9221, and the plurality of flow guiding plates 9274 are unfolded in an umbrella shape outward under the support of the corresponding connecting rods 9275; when in the tensioned state, the atomized liquid droplets of the extinguishing agent 926 ejected from the spray holes 9222 impact the corresponding flow guiding plates 9274, and the thorn rod 9271 is pulled outward by the connecting rod 9275 under the action of the applied tension, so that the flow guiding plates 9274 are folded inward, and the folding amplitude decreases as the extinguishing agent 926 in the cylinder 921 is consumed.

[0074] By adopting the above technical solution, it is possible to solve the technical problem that when the in-wheel motor accidentally catches fire under the extreme operating state, the nozzle facing the in-wheel motor horizontally atomizes the perfluoroketone fire extinguishing agent into micron-sized droplets and sprays it straight at the in-wheel motor. In this spraying method, the coverage area of the fire extinguishing agent is small. Generally, it is aimed at the central area of the in-wheel motor, and the amount of fire extinguishing agent received by the outer periphery of the in-wheel motor itself is less, and the amount of fire extinguishing agent received by the more outer areas such as the wheels and tires of the test vehicle is even less, resulting in poor fire extinguishing effect.

[0075] The provided diversion component 927 can dynamically adjust the spraying mode to achieve the fire extinguishing strategy of "penetrating first and then covering", effectively improving the overall fire extinguishing effect in the in-wheel motor area.

[0076] When the fire extinguishing component 92 starts to extinguish the fire, the fire extinguishing agent 926 in the cylinder body 921 presses the diaphragm 9221, causing the diaphragm 9221 to be deformed under pressure and touch the conical part of the stab rod 9271. This conical part generates a stress concentration effect, greatly reducing the rupture threshold of the diaphragm 9221, making the diaphragm 9221 easier to rupture, and further shortening the spraying time of the fire extinguishing agent 926.

[0077] Initial high-pressure stage (when the fire extinguishing agent is full): The high-pressure atomized droplets ejected from the spray holes 9222 impact the inner surface of the diversion plate 9274. The impact force is converted into an axial pulling force on the circular block 9272 through the connecting rod 9275, overcoming the elastic force of the telescopic spring 9273 to pull the stab rod 9271 outwards; the diversion plate 9274 closes inwards to form a focused spraying angle, causing the fire extinguishing agent 926 to concentrate on impacting the core fire source of the in-wheel motor; in this stage, the kinetic energy advantage of the high-pressure fluid is utilized to ensure that the fire extinguishing agent 926 penetrates the center area of the flame and quickly reduces the core temperature.

[0078] Mid-term transition stage (when 30%-70% of the fire extinguishing agent is consumed): The pressure drop in the cylinder body 921 causes the spraying impact force to weaken, and the telescopic spring 9273 gradually retracts, pushing the diversion plate 9274 to gradually unfold to a medium angle through the connecting rod 9275, and the spraying coverage area expands to the outer periphery of the in-wheel motor and the adjacent wheel area, forming an annular protection belt.

[0079] Final low-pressure stage (when the remaining fire extinguishing agent is <30%): The stab rod 9271 is completely reset under the action of the spring force, the diversion plate 9274 unfolds to the initial wide angle, and the fire extinguishing agent 926 diffuses in an umbrella shape to cover more outer areas such as the tires to prevent these flammable areas from reigniting.

[0080] Preferably, the outer surface of the diversion plate 9274 can be set as an arc surface; this can significantly optimize the hydrodynamic characteristics and spatial coverage effect of the fire extinguishing agent.

[0081] Such as Figure 7 、 Figure 10 and Figure 11As shown in the figure, the temperature control component 93 includes an insulating hard tube 931 horizontally and fixedly connected to the middle of the top surface of the vertical part of the corresponding protective cover plate 8. The rear port of the insulating hard tube 931 is axially connected with a socket 932. The inner surface of the socket 932 is radially symmetrically provided with jacks. The two jacks are respectively connected in series with the electric push rod 923 and its rechargeable battery 9231 through wires 9321 adapted to them. The front port of the insulating hard tube 931 is axially butted with a temperature sensing cylinder 933, and the front end of the temperature sensing cylinder 933 is close to the corresponding wheel hub of the test vehicle 10. Axially connected to the front end inside the temperature sensing cylinder 933 is a memory alloy spring 935 that can expand when heated. The rear end of the memory alloy spring 935 is axially connected with an insulating circular plate 936. An insulating guide rod 934 axially passes through the middle of the insulating circular plate 936 with a gap. One end of the insulating guide rod 934 is connected to the inner surface of the socket 932, and the other end is connected to the front end inside the temperature sensing cylinder 933. Fixedly adhered to the front surface of the insulating circular plate 936 is a U-shaped conductive sheet 9361. The ends of the conductive sheet 9361 are respectively radially and perpendicularly symmetrically connected with guide insertion posts 9362. The guide insertion posts 9362 can be correspondingly inserted and matched with the jacks of the socket 932 to connect the power supply circuit of the electric push rod 923.

[0082] By adopting the above technical solution, the set temperature control component 93 realizes precise fire extinguishing control in a high-temperature environment through mechanical thermal triggering and modular circuit design.

[0083] The memory alloy spring 935 (preferably a nickel-titanium two-way memory alloy spring, which can realize a reversible deformation cycle through temperature change) expands when heated due to overheating of the in-wheel motor, so as to push the insulating circular plate 936 forward, making the guide insertion posts 9362 of the U-shaped conductive sheet 9362 inserted into the jacks (not shown in the figure) of the socket 932 to form a closed loop. This mechanical triggering mechanism effectively improves the response speed compared with traditional electronic sensors and does not require external power supply, especially suitable for complex working conditions with strong electromagnetic interference in the cabin 1.

[0084] The insulating guide rod 934 is connected with the insulating circular plate 936 through a gap to ensure that the deformation trajectory of the spring is strictly along the axis, avoiding poor contact caused by radial offset of the conductive sheet 9361.

[0085] The insulating hard tube 931 (preferably made of alumina ceramic material, with a temperature resistance of 1200 °C) physically isolates the socket 932 from the temperature sensing cylinder 933, and cooperates with the insulating circular plate 936 to keep a certain distance between the conductive circuit and high-temperature components, and still maintain the insulation resistance of the circuit when the surface temperature of the in-wheel motor is relatively high.

[0086] The front end of the temperature sensing cylinder 933 preferably adopts a thin-wall structure, which effectively improves the efficiency of heat transfer from the in-wheel motor to the memory alloy spring 935 and effectively improves the detection sensitivity.

[0087] Through full mechanical triggering and multiple insulation protections, the failure rate of the temperature control component 93 in extreme environments is effectively reduced compared with traditional solutions, and at the same time, the temperature detection accuracy is also improved. It is especially suitable for independent fire extinguishing control in the scenario of differential overheating of four-wheel hub motors.

[0088] As Figure 5 and Figure 6 shown, the fixed support component 91 includes a horizontally arranged support platform 911. At the four corners of the support platform 911, guiding rods 913 are vertically and symmetrically inserted with gaps. The bottom ends of the guiding rods 913 are fixedly connected to the top surface of the horizontal part of the corresponding protective cover plate 8. A support spring 914 is axially sleeved on the guiding rod 913. The bottom end of the support spring 914 is connected to the protective cover plate 8, and its top end is connected to the support platform 911. In the middle of the bottom surface of the support platform 911, a U-shaped seat 915 is vertically connected. A support screw rod 916 is inserted through the middle of the U-shaped seat 915 with a gap. The bottom end of the support screw rod 916 is fixedly connected to the top surface of the horizontal part of the protective cover plate 8. The U-shaped seat 915 is clamped and connected up and down by two positioning nuts 9161 axially screwed on the support screw rod 916. The cylinder body 921 of the fire extinguishing component 92 is horizontally and fixedly connected to the top surface of the support platform 911.

[0089] By adopting the above technical solution, the set fixed support component 91 realizes the stable support and dynamic adjustment of the fire extinguishing component 92 through a multi-stage buffering and precise lifting and positioning structure, enabling the nozzle 922 to longitudinally displace along the long strip hole 82 to align with the center position of the hub motor, which is beneficial for the subsequent ejected fire extinguishing agent to fully cover the hub motor and improve the single fire extinguishing effect.

[0090] The double-nut locking structure of the U-shaped seat 915 and the support screw rod 916 realizes the vertical position adjustment of the support platform 911 by adjusting the position of the positioning nut 9161 of the support screw rod 916, and can adapt to the installation height of different models of fire extinguishing components 92 to meet the test requirements of hub motors with different diameters.

[0091] The four guiding rods 913 and the support springs 914 form a symmetrical layout. When the testing machine 2 bears the torque impact of the four-wheel hub motor, the support platform 911 can vertically float along the guiding rods 913, and the vibration acceleration is attenuated.

[0092] The four guiding rods 913 and the support screw rod 916 form a five-point statically determinate support to ensure the uniform pressure on the diaphragm 9221. Loosening the positioning nut 9161 can disassemble the support platform 911 together with the fire extinguishing component 92 as a whole without removing the protective cover plate 8, and the maintenance efficiency is effectively improved compared with the traditional welding structure.

[0093] As Figure 5 and Figure 6As shown in the figure, an arc-shaped groove 9111 is formed through the middle of the top surface of the support platform 911, and the lower part of the cylinder 921 is clamped and matched with the arc-shaped groove 9111; the upper part of the cylinder 921 is radially clamped and matched with a "Ω"-shaped clamp 912, and the bottom end of the clamp 912 is fixedly connected to the support platform by bolts; the rear end surface of the clamp 912 is radially and vertically symmetrically connected with an L-shaped claw 9121, the open end of the cylinder 921 abuts against the horizontal part of the claw 9121, and its closed end abuts against the inner vertical surface of the protective cover plate 8.

[0094] By adopting the above technical solutions, the arc-shaped groove 9111, the clamp 912 and the claw 9121 realize the high-stability installation and rapid maintenance of the fire extinguishing component 92 through multi-dimensional limiting and adaptive locking design.

[0095] The arc-shaped groove 9111 and the lower part of the cylinder 921 form a line contact support. With the Ω-shaped coating of the clamp 912, the vibration stress is dispersed to the four guide rods 913 of the support platform 911, reducing the radial displacement of the cylinder 921 under vibration.

[0096] An axial gap is formed between the horizontal part of the claw 9121 and the open end of the cylinder 921, and the closed end is kept in gap contact with the inner vertical surface of the protective cover plate 8. Under the reaction force of the fire extinguishing agent injection, the front and rear movement of the cylinder 921 is restricted, ensuring that the axis deviation between the nozzle 922 and the long strip hole 82 is small.

[0097] Loosen the bolts of the clamp 912 to release the Ω-shaped constraint, and lift the cylinder 921 along the arc-shaped groove 9111 to complete the disassembly.

[0098] Embodiment 4

[0099] Combined with Figure 1 and Figure 12 As shown in the figure, on the basis of the above embodiment, the following content is further given in this embodiment:

[0100] In this embodiment, a four-wheel drive and four-motor bench vehicle environment chamber control system includes the four-wheel drive and four-motor bench vehicle environment chamber as described above; this control system is used to collect and control the temperature and humidity data of the air in the chamber 1; the PLC controller installed in this control system collects and processes the temperature and humidity data in the chamber 1 through sensors and sends them to the upper computer interface to realize real-time supervision by users.

[0101] By adopting the above technical solutions, this control system realizes the precise control of the four-wheel hub motor test environment through integrated environment regulation and intelligent monitoring. This control system can collect and adjust parameters such as temperature and humidity in the vehicle environment test chamber.

[0102] The working principle and usage process of the present invention:

[0103] When the present invention is in use, it can be divided into three core stages: environmental simulation, test monitoring, and directional fire extinguishing:

[0104] 1. Environmental simulation stage

[0105] The fresh air unit 3 conveys fresh air with controllable temperature and humidity into the cabin through the air inlet pipe 31. The air treatment box 6 extracts the exhaust gas at the rear of the cabin through the diversion air duct 5, and after purification and temperature adjustment, forms a laminar air supply through the air supply fan box 61, cooperating with the exhaust fan 51 to form a three-dimensional air flow circulation from front to top and then to bottom. The lifting bracket 41 adjusts the height of the oncoming fan 4 to simulate the wind field at a vehicle speed of 0 - 120 km / h. The full-spectrum irradiation system 7 adjusts the angle of the lamps through the angle adjustment mechanism 74: the servo motor 743 drives the long rotating shaft 741 to rotate, which is linked with the transmission rack 747 through the transmission gear 746, so that the full-spectrum lamps 73 under the same suspension rod 71 deflect synchronously, accurately reproducing the sunlight conditions at different latitudes.

[0106] 2. Four-wheel hub motor test stage

[0107] The test vehicle 10 is placed on the test machine 2. The protective cover plate 8 slides along the straight groove 21 to the corresponding position through the straight rod 81, and the locking screw 831 fixes the boss 83. The four-wheel hub motors operate under high-load conditions, and the diversion air duct 5 guides the motor cooling air flow to the air treatment box 6 for temperature and humidity adjustment. The radiant heat generated by the full-spectrum lamp 73 is accurately loaded onto the hub part through adjustable angles to simulate the heat load distribution during actual driving.

[0108] 3. Directional fire extinguishing trigger stage

[0109] When a fire is triggered due to overheating of a certain wheel hub motor: the memory alloy spring 935 at the front end of the temperature-sensing cylinder 933 heats up and elongates, pushing the insulating circular plate 936 forward, so that the guide plug column 9362 is inserted into the socket 932 to connect the circuit; the electric push rod 923 starts, pushing the piston plate 9251 to compress the storage and supply airbag 925, and the gas enters the push pressure airbag 924 through the through hole 9214, squeezing the fire extinguishing agent 926 to break through the diaphragm 9221; the perfluorinated hexanone fire extinguishing agent is atomized and sprayed through the nozzle 922 to cover the fire source area; the support spring 914 buffers the fire extinguishing recoil force, and the clamp 912 and the arc-shaped groove 9111 restrict the displacement of the cylinder body 921 to keep the spraying axis stable.

[0110] 4. System reset stage

[0111] After the fire is extinguished, unlock the bolt of the clamp 912 to replace the cylinder body 921, and rotate the positioning nut 9161 to adjust the height of the support platform 911. The servo motor 743 rotates in reverse to reset the full-spectrum lamp 73, and the fresh air unit 3 increases the air exchange volume to discharge the residual fire extinguishing agent.

[0112] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A four-wheel drive and four-motor bench vehicle environmental chamber, comprising a chamber body (1), one end face of which is provided with a chamber door (11) that can be opened and closed, and two pairs of test machines (2) are buried in a rectangular distribution on its inner bottom surface, and it is characterized in that: One end of the outer top surface of the cabin body (1) is provided with a fresh air unit (3), and the fresh air unit (3) is communicated with the inside of the cabin body (1) through a matching air inlet pipe (31); the other end of the outer top surface is provided with an air treatment box (6), the air outlet of the air treatment box (6) is connected in series with a blower box (61) arranged above the front part inside the cabin body (1) through a pipeline, and its air inlet is connected in parallel with the diversion air ducts (5) arranged on both sides below the rear part inside the cabin body (1) through pipelines, and exhaust fans (51) are connected and arranged on the parallel pipelines located on the outer top surface of the cabin body (1); a face blower (4) is arranged along the long axis on the bottom surface of the front part inside the cabin body (1), and the face blower (4) is supported by a matching lifting bracket (41); a full-spectrum irradiation system (7) with adjustable illumination angle is suspended on the inner top surface of the cabin body (1).

2. The four-wheel drive and four-motor bench vehicle environmental chamber according to claim 1, characterized in that: The full-spectrum irradiation system (7) includes a plurality of suspension rods (71), which are cross-connected into a rectangular grid shape, and a suspension rod (72) fixedly connected to the inner top surface of the cabin body (1) is vertically connected to the top surface of each intersection point; a plurality of full-spectrum lamps (73) are suspended in a straight line at equal intervals directly below the suspension rods (71) in the long side direction, and the upper part of the shell end surface of the full-spectrum lamp (73) is pivotally connected to a hanging bracket (731) in an inverted U shape vertically fixed to the bottom surface of the corresponding suspension rod (71); a plurality of full-spectrum lamps (73) located below the same suspension rod (71) are synchronously positioned and rotated left and right within an acute angle range through an angle adjustment mechanism (74) arranged on the top surface of the suspension rod (71).

3. The four-wheel drive and four-motor bench vehicle environmental chamber according to claim 2, characterized in that: The angle adjustment mechanism (74) includes a long rotating shaft (741), the long rotating shaft (741) vertically rotates through a plurality of suspension rods (72) on the corresponding suspension rod (71), one end of the long rotating shaft (741) is rotatably connected with a bearing seat (742), and the other end is axially driven and connected with a servo motor (743); hanging ears (744) are vertically and symmetrically fixedly connected to the upper parts of the side surfaces of the shell of the full-spectrum lamp (73), and a long connecting rod (745) is fixedly connected through the plurality of hanging ears (744) on the same side; transmission gears (746) in the same vertical plane as the corresponding head and tail hanging ears (744) are axially fixedly connected through the end parts of the long rotating shaft (741), an open-type transmission rack (747) is meshed and hung on the transmission gear (746), tongue rods (7471) are respectively connected to the end parts of the transmission rack (747), and the bottom ends of the tongue rods (7471) are pivotally connected to U-shaped tongue seats (7441) fixedly connected to the outer sides of the top surfaces of the corresponding hanging ears (744); a U-shaped limiting frame (7461) is reversely buckled outside the transmission gear (746) with a gap, and both side surfaces of the limiting frame (7461) are rotatably connected with the long rotating shaft (741).

4. A four-wheel drive and four-motor bench vehicle environmental chamber according to claim 1, characterized in that: On each of the four testing machines (2), an L-shaped protective cover plate (8) with a size adapted to it is slidably arranged along the short side direction of the cabin body (1), and a directional fire extinguishing mechanism (9) for automatically extinguishing the corresponding hub motor of the test vehicle (10) on the testing machine (2) is arranged along the center line on the top surface of the horizontal part of each protective cover plate (8); The directional fire extinguishing mechanism (9) includes a fixed support assembly (91) arranged on the top surface of the horizontal part of the corresponding protective cover plate (8). A fire extinguishing assembly (92) containing a fire extinguishing agent (926) is installed on the fixed support assembly (91), and the fire extinguishing agent (926) is in a liquid state at normal temperature. The fire extinguishing assembly (92) is automatically opened by a temperature control assembly (93) extending forward on the top surface of the vertical part of the protective cover plate (8) to sense the flame temperature and sprays the fire extinguishing agent (926) through the vertical part of the protective cover plate (8).

5. A four-wheel drive and four-motor bench vehicle environmental chamber according to claim 4, characterized in that: The fire extinguishing assembly (92) includes a cylinder body (921) horizontally fixed on the top of the fixed support assembly (91). The cylinder body (921) is a non-pressurized circular structure with one end open and the other end closed. A spray head (922) is vertically connected to the middle of the closed end. A diaphragm (9221) is sealed at the inner port of the spray head (922). The spray head (922) passes through a long hole (82) longitudinally opened on the center line of the vertical part of the protective cover plate (8) at an interval. The cylinder body (921) is divided into two chambers by a partition plate (9213) axially arranged in the middle. A push airbag (924) is axially sealed and fitted on the vertical surface of the partition plate (9213) in the front chamber, and a storage and delivery airbag (925) is axially sealed and fitted on the vertical surface of the partition plate (9213) in the rear chamber. The storage and delivery airbag (925) is connected to the push airbag (924) through a through hole (9214) axially opened in the middle of the partition plate (9213). The front chamber of the cylinder body (921) is filled with the fire extinguishing agent (926) through a filling port (9212) opened on the top of the cylinder body (921). An electric push rod (923) with a built-in series charging battery (9231) is axially suspended in the middle of the port of the rear chamber. The electric push rod (923) is fixedly clamped with a cross (9211) fixed to the open end of the cylinder body (921). The outer end face of the storage and delivery airbag (925) is axially connected with a piston plate (9251), and the piston plate (9251) is axially slidably attached to the inner wall of the cylinder body (921). The power output end of the electric push rod (923) is vertically connected to the piston plate (9251).

6. The four-wheel drive and four-motor bench vehicle environmental chamber according to claim 5, characterized in that: The temperature control component (93) includes an insulating rigid tube (931) horizontally and fixedly connected to the middle of the top surface of the vertical part of the corresponding protective cover plate (8). The rear port of the insulating rigid tube (931) is axially connected to a socket (932). The inner surface of the socket (932) is radially symmetrically provided with jacks. The two jacks are respectively connected in series with the electric push rod (923) and its rechargeable battery (9231) through wires (9321) adapted to them. Its front port is axially butted with a temperature sensing cylinder (933), and the front end of the temperature sensing cylinder (933) is close to the corresponding wheel hub of the test vehicle (10). An axially connected heat-expandable memory alloy spring (935) is axially connected to the inner front end of the temperature sensing cylinder (933). The rear end of the memory alloy spring (935) is axially connected to an insulating circular plate (936). An insulating guide rod (934) axially passes through the middle of the insulating circular plate (936) with a gap. One end of the insulating guide rod (934) is connected to the inner surface of the socket (932), and the other end is connected to the inner front end of the temperature sensing cylinder (933). A U-shaped conductive sheet (9361) is fixedly attached to the front end face of the insulating circular plate (936). The ends of the conductive sheet (9361) are respectively radially and perpendicularly symmetrically connected with guide insertion posts (9362). The guide insertion posts (9362) can be correspondingly inserted and matched with the jacks of the socket (932) to connect the power supply circuit of the electric push rod (923).

7. A four-wheel drive and four-motor bench vehicle environmental chamber according to claim 5, characterized in that: The fixed support component (91) includes a horizontally arranged support platform (911). Guide rods (913) are respectively vertically and symmetrically inserted through the four corners of the support platform (911) with gaps. The bottom ends of the guide rods (913) are fixedly connected to the top surface of the horizontal part of the corresponding protective cover plate (8). A support spring (914) is axially sleeved on the guide rod (913). The bottom end of the support spring (914) is connected to the protective cover plate (8), and the top end is connected to the support platform (911). A U-shaped seat (915) is vertically connected to the middle of the bottom surface of the support platform (911). A support screw rod (916) is inserted through the middle of the U-shaped seat (915) with a gap. The bottom end of the support screw rod (916) is fixedly connected to the top surface of the horizontal part of the protective cover plate (8). The U-shaped seat (915) is clamped and connected up and down by two positioning nuts (9161) axially screwed on the support screw rod (916). The cylinder body (921) of the fire extinguishing component (92) is horizontally and fixedly connected to the top surface of the support platform (911).

8. The four-wheel drive and four-motor bench vehicle environmental chamber according to claim 7, characterized in that: An arc-shaped groove (9111) is formed through the middle of the top surface of the support platform (911). The lower part of the cylinder body (921) is clamped and matched with the arc-shaped groove (9111). An "Ω”-shaped clamp (912) is radially clamped and matched with the upper part of the cylinder body (921). The bottom end of the clamp (912) is fixedly connected to the support platform by bolts. L-shaped claws (9121) are radially and perpendicularly symmetrically connected to the rear end face of the clamp (912). The open end of the cylinder body (921) abuts against the horizontal part of the claws (9121), and its closed end abuts against the inner surface of the vertical part of the protective cover plate (8).

9. A four-wheel drive and four-motor bench vehicle environmental chamber according to claim 4, characterized in that: Straight grooves (21) are symmetrically arranged on both ends of the pit of the test machine (2), straight rods (81) are symmetrically arranged at both ends of the bottom surface of the protective cover plate (8), and the straight rods (81) are horizontally slidably engaged and clamped with the corresponding straight grooves (21); A boss (83) is vertically connected to the outer end of the horizontal part of the protective cover plate (8), and a locking screw rod (831) is vertically and clearance-passed through the boss (83). When the straight rod (81) slides to the outer end of the straight groove (21), the locking screw rod (831) is axially screwed and fixed with a screw hole correspondingly opened on the inner bottom surface of the cabin (1).

10. A four-wheel drive and four-motor bench vehicle environmental chamber control system, characterized in that: Including the four-wheel drive and four-motor bench whole vehicle environmental cabin according to any one of the above 1 to 9; the control system is used to realize the acquisition and control of the temperature and humidity data of the air in the cabin (1); the PLC controller provided in the control system collects and processes the temperature and humidity data in the cabin (1) through sensors and sends them to the upper computer interface to realize the real-time supervision of users.

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