A thermal balance control method and system for wheel-side drive motor

Abstract

The invention relates to the technical field of wheel-side motors, and particularly to a wheel-side drive motor thermal balance control method and system, which effectively solve the problems of unstable balanced suspension and poor heat dissipation effect of the wheel-side motor; the method comprises a main suspension, wherein a Y-shaped auxiliary suspension is hinged on the left and right sides of the main suspension respectively, a steering knuckle is arranged on the upper side of the auxiliary suspension, a sleeve shaft is coaxially rotatably connected to the outer side of the steering knuckle, a rotating shaft is fixedly connected to the sleeve shaft, one end of the rotating shaft is fixedly connected to a wheel hub, a wheel-side motor is fixedly connected to the inner side of the steering knuckle, an output end of the wheel-side motor is coaxially fixedly connected to the wheel hub, a temperature control component is arranged on the outer side of the wheel-side motor, and the temperature control component can detect and control the temperature of the wheel-side motor; the invention can control the temperature of the wheel-side motors on both sides by arranging the temperature control component, thereby ensuring that the motors can dissipate heat in time when the load is too large, and at the same time ensuring that the temperature difference of the wheel-side motors on the left and right sides is kept within an appropriate range, thereby avoiding thermal imbalance due to excessive temperature difference.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel-side motors, and in particular to a thermal balance control method and system for a wheel-side drive motor. Background Art

[0002] As people pay more and more attention to the concept of environmental protection, in terms of travel, traditional internal combustion engine vehicles are gradually replaced by electric vehicles, and the electric vehicle motor is the core component of the electric vehicle. When the motor works for a long time, the surface temperature of the motor will be high. At this time, the thermal balance of the motor needs to be controlled to ensure the safety of the motor and avoid danger during the operation of the motor. The existing wheel-side motors are mostly installed on the balancing suspension coaxially with the wheels. The vehicle's balancing suspension can reduce the problem of large-scale bumps in the vehicle during driving. It can well adjust the ups and downs of the vehicle, thereby improving the safety of the wheel-side motor and avoiding the problem of vibration causing damage to the internal equipment of the motor and overload. Therefore, it is necessary to provide a safe use space for the wheel-side motor, that is, the suspension needs to be improved to avoid the motor's temperature control due to overload and other problems. In addition, the existing wheel-side motor has poor heat dissipation capacity during use and cannot achieve rapid heat dissipation. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a wheel-side drive motor thermal balance control method and system, which effectively solves the problems of unstable balanced suspension and poor heat dissipation of the wheel-side motor.

[0004] The technical solution is as follows: the present invention comprises a main suspension, wherein a Y-shaped auxiliary suspension is hinged on the left and right sides of the main suspension respectively, a steering knuckle is arranged on the upper side of the auxiliary suspension, a sleeve shaft is coaxially rotatably connected to the outer side of the steering knuckle, a rotating shaft is fixedly connected inside the sleeve shaft, a wheel hub is fixedly connected to one end of the rotating shaft, a wheel side motor is fixedly connected to the inner side of the steering knuckle, an output end of the wheel side motor is coaxially fixedly connected to the wheel hub, a temperature control component is arranged on the outer side of the wheel side motor, the temperature control component can detect and control the temperature of the wheel side motor, a bogie is fixedly connected to the upper side of the steering knuckle, a buffer component is arranged on the upper side of the bogie, the buffer component can be used to balance the main suspension, a connecting frame is arranged on the upper side of the main suspension, fixing components are arranged on the left and right sides of the front end of the main suspension respectively, and the fixing components are used to fix the main suspension on the connecting frame.

[0005] The left and right sides of the auxiliary suspension are respectively ball-jointed with fixing pins, and the upper sides of the fixing pins are fixedly connected to the bogie via nuts.

[0006] The temperature control component includes a dustproof net, a cooling fan is arranged inside the dustproof net, cooling fins are fixedly connected to the upper and lower sides of the wheel-side motor respectively, a heat sink is fixedly connected to the rear end of the wheel-side motor, a liquid cooling pipe is arranged on the heat sink, a bracket is fixedly connected to the outer end of the dustproof net, a liquid cooler is arranged on the bracket, the liquid cooling pipe and the liquid cooler cooperate to form a liquid cooling cycle, a controller is fixedly connected to the upper end of the steering knuckle, a temperature sensor is arranged on the rear side of the controller, and the detection end of the temperature sensor is facing the wheel-side motor.

[0007] The heat dissipation fan is connected to the controller by electrical signals, the liquid cooler is connected to the controller by electrical signals, and the temperature sensor is connected to the controller by electrical signals.

[0008] The buffer assembly includes an oil cylinder, an outer oil chamber is opened in the oil cylinder, a main piston is slidably connected in the outer oil chamber, the lower side of the main piston is fixedly connected to the connecting frame, the main piston is divided into an upper and lower chambers through a floating piston, the upper chamber is an inner oil chamber, and the lower chamber is an air chamber, damping holes are opened on the left and right sides of the upper end of the main piston, and one-way valves are arranged in the damping holes, and the two one-way valves are in opposite directions.

[0009] A mounting plate is fixedly connected to the rear side of the main suspension, an oil tank is fixedly connected to the upper end of the mounting plate, plunger pumps are respectively provided on the left and right sides of the oil tank, oil pipes are respectively provided on the left and right sides of the oil tank, and the oil pipes are connected to the inner oil chamber on the corresponding side through the plunger pump plug on the corresponding side.

[0010] A hydraulic accumulator is fixedly connected to the mounting plate, and accumulator pistons are respectively arranged on the left and right sides of the hydraulic accumulator. The accumulator piston is connected to the outer oil chamber through a hydraulic pipe. A partition is arranged in the middle of the hydraulic accumulator, and a return spring is sleeved on the outer end of the cylinder. The return spring is located between the cylinder and the main piston.

[0011] The outer wall of the sleeve shaft is sleeved with two bearings, and the bearings are interference-connected with the inner wall of the steering knuckle on the corresponding side. A fixing bolt is fixedly connected to one side of the sleeve shaft, and the fixing screw is fixedly connected to the wheel hub through a nut. A brake pad is arranged between the sleeve shaft and the wheel hub.

[0012] The fixing assembly includes a connecting seat, a lower ratchet is slidably connected to the upper side of the connecting seat, a compression spring is fixedly connected to the lower side of the lower ratchet and located between the lower ratchet and the connecting seat, a fixing bolt is slidably connected inside the lower ratchet, the upper side of the fixing bolt can be threadedly connected to the connecting frame, the left and right sides of the connecting frame are respectively slidably connected to upper ratchets coaxial with the fixing bolts on the corresponding sides, the upper ratchet can mesh with the lower ratchet, the left and right sides of the front end of the connecting frame are respectively slidably connected to U-shaped pressing rods, the left and right sides of the pressing rod are respectively provided with inclined grooves, the left and right sides of the upper ratchet are respectively fixedly connected to pins located in the inclined grooves on the corresponding sides, the middle part of the pressing rod is fixedly connected to a balance rod, and the rear end of the balance rod is fixedly connected to a compression spring 2 located between the balance rod and the connecting frame.

[0013] S1: Use the temperature sensor to monitor the temperature of the wheel motor on the corresponding side in real time and transmit it to the controller. The controllers on both sides record the temperature changes through the data acquisition system, analyze the relationship between the wheel motor load and temperature, and transmit it to the vehicle's central control.

[0014] S2: During normal use, the heat dissipation fins on the upper and lower sides of the wheel-side motor are used to dissipate heat to ensure the normal use of the wheel-side motor. At the same time, the temperature sensor always monitors the motor temperature to ensure that the temperature of the motors on both sides is within a controllable range.

[0015] S3: When the temperature exceeds the set threshold, the controller automatically issues an alarm and takes measures. First, the cooling fan is started to speed up the heat dissipation of the motor and control the temperature to drop. If the temperature drops too slowly, the controller can start the liquid cooler to quickly dissipate heat from the motor through the liquid cooling pipe. The three cooling systems cooperate with each other to start the corresponding cooling structure according to the cooling requirements.

[0016] S4: The controllers on the left and right sides perform data analysis on the wheel motors on both sides according to the signals transmitted by the temperature sensors on their corresponding sides. When a temperature difference is found between the motors on both sides, the heat dissipation structure on the side with higher temperature needs to be started to dissipate heat from the motor, so as to quickly keep the temperature difference between the wheel motors on the left and right sides within a reasonable range.

[0017] The present invention can control the temperature of the wheel-side motors on both sides by arranging a temperature control component, ensure that the motors can dissipate heat in time when the load is too large, and ensure that the temperature difference between the left and right wheel-side motors is kept within an appropriate range to avoid thermal imbalance due to excessive temperature difference. The wheel-side motors and buffer components can be arranged to buffer the vehicle during driving to avoid the problem of excessive up and down bumps of the vehicle due to uneven road surface, which causes the wheel-side motors to be overloaded due to idling of the tires during bumps and sudden contact with the ground, thereby causing temperature differences between the wheel-side motors on both sides, affecting the subsequent operation of the wheel-side motors on both sides, and easily causing operation differences. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the main axonometric drawing of the present invention.

[0019] Figure 2 It is an exploded front view schematic diagram of the fixing assembly in the present invention.

[0020] Figure 3 It is a front view schematic diagram of the main suspension in the present invention.

[0021] Figure 4 It is a rear view schematic diagram of the liquid cooler in the present invention.

[0022] Figure 5 It is a rear view schematic diagram of the wheel side motor in the present invention.

[0023] Figure 6 It is a partially cut-away rear view schematic diagram of the wheel-side motor in the present invention.

[0024] Figure 7 It is a partially cutaway front view schematic diagram of the hydraulic accumulator in the present invention.

[0025] Figure 8 The present invention Figure 6 A is an enlarged view of the middle image.

[0026] Fig. 9 The present invention Figure 6 Enlarged view of B.

[0027] In the figure: 1. Main suspension; 2. Auxiliary suspension; 3. Steering knuckle; 4. Bushing shaft; 5. Rotating shaft; 6. Wheel hub; 7. Wheel side motor; 8. Connecting frame; 9. Fixing nail; 10. Dust screen; 11. Cooling fan; 12. Cooling fin; 13. Liquid cooling pipe; 14. Liquid cooler; 15. Controller; 16. Temperature sensor; 17. Oil cylinder; 18. Outer oil chamber; 19. Main piston; 20. Inner oil chamber; 21 , air chamber; 22, damping hole; 23, one-way valve; 24, oil tank; 25, plunger pump; 26, oil pipe; 27, hydraulic accumulator; 28, accumulator piston; 29, hydraulic pipe; 30, bearing; 31, brake pad; 32, lower ratchet; 33, compression spring one; 34, fixing bolt; 35, upper ratchet; 36, pressing rod; 37, tilting groove; 38, latch; 39, balance rod; 40, compression spring two. DETAILED DESCRIPTION

[0028] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0029] Depend on Figures 1 to 9 It is given, including a main suspension 1, the left and right sides of the main suspension 1 are respectively hinged with Y-shaped auxiliary suspensions 2, the upper side of the auxiliary suspension 2 is provided with a steering knuckle 3, the outer side of the steering knuckle 3 is coaxially rotatably connected with a sleeve shaft 4, the sleeve shaft 4 is fixedly connected with a rotating shaft 5, one end of the rotating shaft 5 is fixedly connected with a wheel hub 6, the inner side of the steering knuckle 3 is fixedly connected with a wheel-side motor 7, the output end of the wheel-side motor 7 is coaxially fixedly connected to the wheel hub 6, a temperature control component is provided on the outer side of the wheel-side motor 7, the temperature control component can play a role in detecting and controlling the temperature of the wheel-side motor 7, a bogie is fixedly connected to the upper side of the steering knuckle 3, a buffer component is provided on the upper side of the bogie, and the buffer component can be used to balance the main suspension 1, a connecting frame 8 is provided on the upper side of the main suspension 1, and fixed components are provided on the left and right sides of the front end of the main suspension 1, respectively, and the fixed components are used to fix the main suspension 1 on the connecting frame 8.

[0030] As shown in the figure, the main suspension 1, the auxiliary suspension 2, the steering knuckle 3, the sleeve shaft 4, the wheel hub 6, the wheel side motor 7 and the buffer assembly are provided to buffer the vehicle during driving, so as to avoid the problem of excessive up and down bumps of the vehicle when driving on uneven roads, thereby avoiding the problem of excessive load on the wheel side motor 7 due to idling of the tire during bumps and sudden contact with the ground, resulting in differences in the operation of the wheel side motors 7 on both sides, and thus the problem of thermal imbalance, which in turn affects the differences in the subsequent operation of the wheel side motors 7 on both sides, causing adverse consequences. , a temperature control component is set to control the temperature of the wheel-side motors 7 on both sides, ensuring that the motors can dissipate heat in time when the load is too large, and at the same time ensuring that the temperature difference between the wheel-side motors 7 on the left and right sides is kept within an appropriate range to avoid thermal imbalance due to excessive temperature difference. The main suspension 1, the fixing component and the connecting frame 8 are set to facilitate the use of the fixing component to fix the main suspension 1 on the connecting frame 8, thereby fixing the main suspension 1 to the vehicle, and avoiding the problem of unstable fixation caused by vibration during driving, and facilitating the disassembly of the main suspension 1, wherein the fixing methods around the main suspension 1 can be fixed in a fixed manner.

[0031] The auxiliary suspension 2 is ball-jointed with fixing pins 9 on the left and right sides respectively, and the upper side of the fixing pins 9 is fixedly connected to the bogie via nuts.

[0032] As shown in the figure, fixing nails 9 and nuts are provided to fix the bogie on the main suspension 1, and the ball joint is used to ensure that the bogie can swing normally.

[0033] The temperature control component includes a dustproof net 10, a cooling fan 11 is arranged inside the dustproof net 10, cooling fins 12 are fixedly connected to the upper and lower sides of the wheel-side motor 7, a heat sink is fixedly connected to the rear end of the wheel-side motor 7, a liquid cooling pipe 13 is arranged on the heat sink, a bracket is fixedly connected to the outer end of the dustproof net 10, a liquid cooler 14 is arranged on the bracket, the liquid cooling pipe 13 cooperates with the liquid cooler 14 to form a liquid cooling cycle, a controller 15 is fixedly connected to the upper end of the steering knuckle 3, a temperature sensor 16 is arranged on the rear side of the controller 15, and the detection end of the temperature sensor 16 is facing the wheel-side motor 7.

[0034] As shown in the figure, a dustproof net 10 is provided to prevent excessive dust from entering the cooling fan 11 during driving, thereby reducing the cooling effect. The cooling fan 11, cooling fins 12, cooling plates, liquid cooling tubes 13 and liquid coolers 14 are provided to quickly dissipate the heat of the wheel-side motor 7. At the same time, the cooling fins 12 can dissipate heat autonomously. The cooling fans 11 and the liquid cooling tubes 13 need to be controlled and started by the controller 15 to dissipate the heat of the wheel-side motor 7. Different cooling structures can be started according to different needs to dissipate the heat of the wheel-side motor 7. At the same time, different cooling effects can be used to quickly control the temperature of the wheel-side motors 7 on the left and right sides to avoid large temperature differences. The controller 15 and the temperature sensor 16 can monitor the temperature of the wheel-side motor 7 on the corresponding side in real time, and provide the data to the controller 15 to achieve the purpose of temperature control on both sides.

[0035] The heat dissipation fan 11 is connected to the controller 15 by electrical signals, the liquid cooler 14 is connected to the controller 15 by electrical signals, and the temperature sensor 16 is connected to the controller 15 by electrical signals.

[0036] As shown in the figure, the above configuration can ensure that the controller 15 can perform overall combined and differentiated control on the cooling fan 11 , the liquid cooler 14 and the temperature sensor 16 .

[0037] The buffer assembly includes an oil cylinder 17, an outer oil chamber 18 is opened in the oil cylinder 17, a main piston 19 is slidably connected in the outer oil chamber 18, the lower side of the main piston 19 is fixedly connected to the connecting frame 8, the main piston 19 is divided into an upper and lower chambers through a floating piston 42, the upper chamber is an inner oil chamber 20, and the lower chamber is an air chamber 21, damping holes 22 are respectively opened on the left and right sides of the upper end of the main piston 19, and a one-way valve 23 is arranged in the damping hole 22, and the two one-way valves 23 are in opposite directions.

[0038] As shown in the figure, the oil cylinder 17, the outer oil chamber 18, the main piston 19, the floating piston 42, the inner oil chamber 20, the air chamber 21, the damping hole 22 and the one-way valve 23 are arranged so that under the action of the load, the inert gas in the air chamber 21 is in a compressed state. When the vehicle is stimulated by an uneven road surface, the main piston 19 and the floating piston 42 reciprocate relative to the oil cylinder 17. The compressed inert gas acts as an elastic element of the suspension system to alleviate the vibration and impact transmitted, and the oil flows through the damping hole 22 and the one-way valve 23 in the oil cylinder 17 to produce a damping effect to attenuate the vibration of the vehicle body. When the suspension is in During the compression stroke, the pressure in the outer oil chamber 18 increases, while the pressure in the inner oil chamber 20 decreases. The oil in the outer oil chamber 18 flows to the inner oil chamber 20 through the damping hole 22 and the one-way valve 23 at the same time, generating a smaller damping force. The relative movement of the oil cylinder 17 and the main piston 19 is mainly suppressed by the elastic effect in the hydraulic accumulator 27. When the suspension is in the extension stroke, the pressure in the inner oil chamber 20 decreases, while the pressure in the outer oil chamber 18 increases. The oil in the inner oil chamber 20 flows to the outer oil chamber 18 only through the damping hole 22, generating a larger damping force, so as to quickly attenuate the movement, thereby playing an overall buffering role.

[0039] The rear side of the main suspension 1 is fixedly connected with a mounting plate, the upper end of the mounting plate is fixedly connected with an oil tank 24, the left and right sides of the oil tank 24 are respectively provided with plunger pumps 25, the left and right sides of the oil tank 24 are respectively provided with oil pipes 26, the oil pipes 26 are connected with the inner oil chamber 20 on the corresponding side through the plunger pump plug on the corresponding side.

[0040] As shown in the figure, an oil tank 24 is provided for the purpose of storing and supplying oil, and a column pump plug is provided to facilitate pumping oil into the inner oil chamber 20.

[0041] A hydraulic accumulator 27 is fixedly connected to the mounting plate, and accumulator pistons 28 are respectively provided on the left and right sides of the hydraulic accumulator 27. The accumulator piston 28 is connected to the outer oil chamber 18 through a hydraulic pipe 29. A partition is provided in the middle of the hydraulic accumulator 27. A return spring is sleeved on the outer end of the cylinder 17, and the return spring is located between the cylinder 17 and the main piston 19.

[0042] As shown in the figure, the hydraulic accumulator 27 is provided to utilize the elastic effect in the hydraulic accumulator 27 to suppress the relative movement between the cylinder 17 and the main piston 19, and the return spring is provided to ensure that the positions of the cylinder 17 and the main piston 19 are restored to a relatively balanced state under normal circumstances.

[0043] The outer wall of the sleeve shaft 4 is sleeved with two bearings 30, and the bearings 30 are interference-connected with the inner wall of the steering knuckle 3 on the corresponding side. A fixing bolt is fixedly connected to one side of the sleeve shaft 4, and the fixing screw is fixedly connected to the wheel hub 6 through a nut. A brake pad 31 is provided between the sleeve shaft 4 and the wheel hub 6.

[0044] As shown in the figure, the bearing 30 is provided to facilitate the rotation of the wheel hub 6, the fixing bolts are provided to facilitate the fixing of the wheel hub 6, and the brake pads 31 are provided to facilitate the subsequent installation of a brake device to brake the wheel hub 6.

[0045] The fixing assembly includes a connecting seat 41, a lower ratchet 32 ​​is slidably connected to the upper side of the connecting seat 41, a compression spring 33 located between the lower ratchet 32 ​​and the connecting seat 41 is fixedly connected to the lower side of the lower ratchet 32, a fixing bolt 34 is slidably connected inside the lower ratchet 32, the upper side of the fixing bolt 34 can be threadedly connected to the connecting frame 8, the left and right sides of the connecting frame 8 are respectively slidably connected to upper ratchet wheels 35 coaxial with the fixing bolts 34 on the corresponding sides, the upper ratchet wheels 35 can mesh with the lower ratchet wheels 32, the left and right sides of the front end of the connecting frame 8 are respectively slidably connected to U-shaped pressing rods 36, the left and right sides of the pressing rod are respectively provided with inclined grooves 37, the left and right sides of the upper ratchet wheels 35 are respectively fixedly connected to pins 38 located in the inclined grooves 37 on the corresponding sides, a balance rod 39 is fixedly connected to the middle part of the pressing rod 36, and a compression spring 40 located between the balance rod 39 and the connecting frame 8 is fixedly connected to the rear end of the balance rod 39.

[0046] As shown in the figure, the fixing assembly is provided so that when the fixing bolt 34 is screwed into the connecting frame 8, the lower ratchet 32 ​​is always in contact with the upper ratchet 35 and the lower ratchet 32 ​​rotates continuously. At this time, it can be ensured that after the fixing bolt 34 is fully tightened, the lower ratchet 32 ​​and the upper ratchet 35 are in a meshing state, thereby preventing the fixing bolt 34 from loosening due to vibration. The use of a pressing bar can release the meshing of the upper ratchet 35 and the lower ratchet 32, so that the purpose of disassembly by rotating the fixing bolt 34 can be achieved. The fixing is stable and the disassembly is convenient, which is easy to use.

[0047] S1: Use the temperature sensor 16 to monitor the temperature of the wheel-side motor 7 on the corresponding side in real time and transmit it to the controller 15. The controllers 15 on both sides record the temperature changes through the data acquisition system, analyze the relationship between the load and temperature of the wheel-side motor 7, and transmit it to the central control of the vehicle.

[0048] S2: During normal use, the heat dissipation fins 12 on the upper and lower sides of the wheel-side motor 7 are used to dissipate heat to ensure the normal use of the wheel-side motor 7. At the same time, the temperature sensor 16 always monitors the motor temperature to ensure that the motor temperatures on both sides are within a controllable range.

[0049] S3: When the temperature exceeds the set threshold, the controller 15 automatically issues an alarm and takes measures. First, the cooling fan 11 is started to accelerate the heat dissipation of the motor and control the temperature to drop. If the temperature drops too slowly, the controller 15 can start the liquid cooler 14 to quickly dissipate the heat of the motor through the liquid cooling pipe 13. The three heat dissipations cooperate with each other to start the corresponding heat dissipation structure according to the heat dissipation requirements.

[0050] S4: The controllers 15 on the left and right sides perform data analysis on the wheel-side motors 7 on both sides according to the signals transmitted by the temperature sensors 16 on the corresponding sides. When a temperature difference is found between the motors on both sides, it is necessary to start the heat dissipation structure on the side with higher temperature to dissipate the heat of the motors, so as to quickly keep the temperature difference between the wheel-side motors 7 on the left and right sides within a reasonable range.

[0051] When the present invention is in use, the main suspension 1 can be quickly fixed to the connecting frame 8 on the vehicle by using the fixing assembly;

[0052] Under the action of the load, the inert gas in the air chamber 21 is in a compressed state. When the vehicle is stimulated by an uneven road surface, the main piston 19 and the floating piston 42 reciprocate relative to the oil cylinder 17. The compressed inert gas acts as an elastic element of the suspension system to alleviate the vibration and impact transmitted, and the oil flows through the damping hole 22 and the one-way valve 23 in the oil cylinder 17 to produce a damping effect to attenuate the vibration of the vehicle body. When the suspension is in a compression stroke, the pressure in the outer oil chamber 18 increases, and the pressure in the inner oil chamber 20 decreases. The oil in the outer oil chamber 18 flows to the inner oil chamber 20 through the damping hole 22 and the one-way valve 23 at the same time, generating a small damping force, mainly relying on the elastic effect in the hydraulic accumulator 27 to suppress the relative movement of the oil cylinder 17 and the main piston 19. When the suspension is in the extension stroke, the pressure in the inner oil chamber 20 decreases, and the pressure in the outer oil chamber 18 increases. The oil in the inner oil chamber 20 only flows to the outer oil chamber 18 through the damping hole 22, generating a large damping force, so as to quickly attenuate the movement, thereby playing an overall buffering role;

[0053] When the wheel-side motor 7 needs to be thermally balanced, the temperature sensor 16 is first used to monitor the temperature of the wheel-side motor 7 on the corresponding side in real time and transmit it to the controller 15. The controllers 15 on both sides record the temperature change through the data acquisition system, analyze the relationship between the load and temperature of the wheel-side motor 7, and transmit it to the central control of the vehicle;

[0054] During normal use, the heat dissipation fins 12 on the upper and lower sides of the wheel-side motor 7 are used to dissipate heat to ensure the normal use of the wheel-side motor 7. At the same time, the temperature sensor 16 always monitors the motor temperature to ensure that the motor temperatures on both sides are within a controllable range. When the temperature exceeds the set threshold, the controller 15 automatically issues an alarm and takes measures. First, the cooling fan 11 is started to speed up the heat dissipation of the motor and control the temperature to drop. If the temperature drops too slowly, the controller 15 can start the liquid cooler 14 to quickly dissipate heat from the motor through the liquid cooling pipe 13. The three heat dissipations cooperate with each other to start the corresponding heat dissipation structure according to the heat dissipation requirements.

[0055] The controllers 15 on the left and right sides perform data analysis on the wheel-side motors 7 on both sides according to the signals transmitted by the temperature sensors 16 on their corresponding sides. When a temperature difference is found between the motors on both sides, it is necessary to start the heat dissipation structure on the side with higher temperature to dissipate the heat of the motors, so as to quickly keep the temperature difference between the wheel-side motors 7 on the left and right sides within a reasonable range.

[0056] In the present invention, the wheel-side motor 7, the cooling fan 11, the liquid cooler 14 and the hydraulic accumulator 27 are all prior art, and the cooling fan 11 is provided with a control motor, and the liquid cooler 14 is provided with a water pump, which will not be described in detail here.

[0057] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A wheel-side drive motor thermal balance control system, the system includes a main suspension, characterized in that: The left and right sides of the main suspension are respectively hinged with Y-shaped auxiliary suspensions, a steering knuckle is provided on the upper side of the auxiliary suspension, a sleeve shaft is coaxially rotatably connected to the outer side of the steering knuckle, a rotating shaft is fixedly connected inside the sleeve shaft, one end of the rotating shaft is fixedly connected to a wheel hub, a wheel-side motor is fixedly connected to the inner side of the steering knuckle, the output end of the wheel-side motor is coaxially fixedly connected to the wheel hub, a temperature control component is provided on the outer side of the wheel-side motor, the temperature control component can play a role in detecting and controlling the temperature of the wheel-side motor, a bogie is fixedly connected to the upper side of the steering knuckle, a buffer component is provided on the upper side of the bogie, the buffer component can be used to balance the main suspension, a connecting frame is provided on the upper side of the main suspension, and fixed components are provided on the left and right sides of the front end of the main suspension, and the fixed components are used to fix the main suspension on the connecting frame; The buffer assembly includes an oil cylinder, an outer oil chamber is provided in the oil cylinder, a main piston is slidably connected in the outer oil chamber, the lower side of the main piston is fixedly connected to the connecting frame, the main piston is divided into an upper and lower chambers through a floating piston, the upper chamber is an inner oil chamber, and the lower chamber is an air chamber, damping holes are provided on the left and right sides of the upper end of the main piston, and one-way valves are provided in the damping holes, and the two one-way valves are in opposite directions; A mounting plate is fixedly connected to the rear side of the main suspension, and an oil tank is fixedly connected to the upper end of the mounting plate. A plunger pump is respectively provided on the left and right sides of the oil tank, and oil pipes are respectively provided on the left and right sides of the oil tank, and the oil pipes are connected to the inner oil chamber on the corresponding side through the plunger pump plugs on the corresponding side; a hydraulic accumulator is fixedly connected to the mounting plate, and accumulator pistons are respectively provided on the left and right sides of the hydraulic accumulator, and the accumulator pistons are connected to the outer oil chamber through hydraulic pipes, and a partition is provided in the middle of the hydraulic accumulator, and a return spring is sleeved on the outer end of the oil cylinder, and the return spring is located between the oil cylinder and the main piston; The fixing assembly includes a connecting seat, a lower ratchet is slidably connected to the upper side of the connecting seat, a compression spring located between the lower ratchet and the connecting seat is fixedly connected to the lower side of the lower ratchet, a fixing bolt is slidably connected inside the lower ratchet, the upper side of the fixing bolt can be threadedly connected to the connecting frame, the left and right sides of the connecting frame are respectively slidably connected to upper ratchets coaxial with the fixing bolts on the corresponding sides, the upper ratchet can mesh with the lower ratchet, the left and right sides of the front end of the connecting frame are respectively slidably connected to U-shaped pressing rods, the left and right sides of the pressing rod are respectively provided with inclined grooves, the left and right sides of the upper ratchet are respectively fixedly connected to pins located in the inclined grooves on the corresponding sides, a balance rod is fixedly connected to the middle part of the pressing rod, and a compression spring located between the balance rod and the connecting frame is fixedly connected to the rear end of the balance rod.

2. The wheel-side drive motor thermal balance control system according to claim 1, characterized in that: The left and right sides of the auxiliary suspension are respectively ball-jointed with fixing pins, and the upper sides of the fixing pins are fixedly connected to the bogie via nuts.

3. The wheel-side drive motor thermal balance control system according to claim 1, characterized in that: The temperature control component includes a dustproof net with a cooling fan inside, cooling fins fixedly connected to the upper and lower sides of the wheel-side motor respectively, a heat sink fixedly connected to the rear end of the wheel-side motor, a liquid cooling pipe arranged on the heat sink, a bracket fixedly connected to the outer end of the dustproof net, a liquid cooler arranged on the bracket, the liquid cooling pipe and the liquid cooler cooperate to form a liquid cooling cycle, a controller fixedly connected to the upper end of the steering knuckle, a temperature sensor arranged on the rear side of the controller, and the detection end of the temperature sensor facing the wheel-side motor.

4. The wheel-side drive motor thermal balance control system according to claim 3, characterized in that: The cooling fan is connected to the controller via electrical signals, the liquid cooler is connected to the controller via electrical signals, and the temperature sensor is connected to the controller via electrical signals.

5. The wheel-side drive motor thermal balance control system according to claim 1, characterized in that: Two bearings are sleeved on the outer wall of the sleeve shaft, and the bearings are interference connected with the inner wall of the steering knuckle on the corresponding side. A fixing bolt is fixedly connected to one side of the sleeve shaft, and the fixing screw is fixedly connected to the wheel hub through a nut. A brake pad is arranged between the sleeve shaft and the wheel hub.

6. A wheel-side drive motor thermal balance control method, the method is implemented based on the wheel-side drive motor thermal balance control system according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1: Use the temperature sensor to monitor the temperature of the wheel motor on the corresponding side in real time and transmit it to the controller. The controllers on both sides record the temperature changes through the data acquisition system, analyze the relationship between the wheel motor load and temperature, and transmit it to the vehicle's central control; S2: During normal use, the heat dissipation fins on the upper and lower sides of the wheel motor are used to dissipate heat to ensure the normal use of the wheel motor. At the same time, the temperature sensor always monitors the motor temperature to ensure that the temperature of the motors on both sides is within the controllable range; S3: When the temperature exceeds the set threshold, the controller automatically issues an alarm and takes measures. First, the cooling fan is started to speed up the heat dissipation of the motor and control the temperature to drop. If the temperature drops too slowly, the controller can start the liquid cooler to quickly dissipate the heat of the motor through the liquid cooling pipe. The three cooling mechanisms cooperate with each other to start the corresponding cooling structure according to the cooling requirements. S4: The controllers on the left and right sides perform data analysis on the wheel motors on both sides according to the signals transmitted by the temperature sensors on their corresponding sides. When a temperature difference is found between the motors on both sides, the heat dissipation structure on the side with higher temperature needs to be started to dissipate heat from the motor, so as to quickly keep the temperature difference between the wheel motors on the left and right sides within a reasonable range.

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