Chassis of electric automobile

Abstract

The invention discloses a chassis of an electric automobile, and belongs to the technical field of electric automobiles. The chassis of the electric automobile comprises a chassis support, front wheels and rear wheels and further comprises a front lifting guide rail and a rear lifting guide rail, the front lifting guide rail is fixedly installed at the front end of the side wall of the chassis support, the rear lifting guide rail is fixedly installed at the rear end of the side wall of the chassis support, the front wheels are arranged on the front lifting guide rail, and the rear wheels are arranged on the rear lifting guide rail. The rear wheels are arranged on the rear lifting guide rails; by adjusting the height of the chassis, the vehicle can better adapt to different road conditions, the jolting feeling is reduced, the riding comfort is improved, and in cross-country or complex terrains, the trafficability of the vehicle can be improved by improving the height of the chassis, the chassis is prevented from colliding with ground obstacles, the chassis is prevented from being damaged, and spontaneous combustion caused by damage of a battery pack is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and in particular to a chassis of an electric vehicle. Background Art

[0002] The suspension system in the chassis of an electric vehicle is used to connect the wheels and the bracket, and plays a role in shock absorption and protection of the vehicle during the operation of the electric vehicle.

[0003] At present, the suspension system in the chassis of electric vehicles is generally composed of springs and gas dampers or springs and hydraulic dampers. The suspension system is used to connect the support frame and the vehicle. However, when the existing vehicles are driving on bumpy roads, they are prone to collision with the ground or stones on the ground, which may cause damage to the battery pack and spontaneous combustion. In order to improve the integrity, a chassis of an electric vehicle is proposed herein. Summary of the invention

[0004] The present invention proposes a chassis for an electric vehicle in order to solve the problem in the prior art that the low chassis of an electric vehicle easily leads to damage and spontaneous combustion of a battery pack.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A chassis of an electric vehicle comprises a chassis support, a front wheel and a rear wheel, and further comprises: a front lifting guide rail and a rear lifting guide rail, wherein the front lifting guide rail is fixedly mounted on the front end of a side wall of the chassis support, and the rear lifting guide rail is fixedly mounted on the rear end of the side wall of the chassis support, the front wheel is arranged on the front lifting guide rail, and the rear wheel is arranged on the rear lifting guide rail; a first lifting suspension and a second lifting suspension, wherein the first lifting suspension is fixedly mounted on the front end of the side wall of the chassis support, and a first shunt box is fixedly mounted on an output end of the first lifting suspension, the first shunt box is fixedly connected to the front lifting guide rail, the second lifting suspension is fixedly mounted on the rear end of the side wall of the chassis support, and a second shunt box is fixedly mounted on an output end of the second lifting suspension, and the second shunt box is fixedly connected to the rear lifting guide rail; when the electric vehicle passes through a bumpy road section, the first lifting suspension and the second lifting suspension drive the chassis support to rise; when the electric vehicle passes through a flat road section and travels at high speed, the first lifting suspension and the second lifting suspension drive the chassis support to descend.

[0006] As a preferred embodiment of the present invention: the chassis bracket includes an integrally formed base plate, a guard plate is fixedly installed at the bottom of the base plate, four groups of reinforcing plates are fixedly installed inside the guard plate, the four groups of reinforcing plates are intersected and welded to form an "X" shape, and a covering plate is fixedly installed on the base plate.

[0007] As a preferred embodiment of the present invention: the first lifting suspension and the second lifting suspension both include a piston cylinder fixedly mounted on the base plate, a first piston plate and a second piston plate are slidably connected in the piston cylinder, the first piston plate is arranged above the second piston plate, a damping spring is arranged between the first piston plate and the second piston plate, both ends of the damping spring are respectively fixedly connected to the first piston plate and the second piston plate, a piston rod is fixedly mounted on the bottom of the second piston plate, two groups of the piston rods are respectively fixedly connected to the first shunt box and the second shunt box, a second chamber is arranged between the first piston plate and the second piston plate, and oil holes communicating with the second chamber are arranged on the two groups of piston rods, and the two groups of the oil holes are respectively communicated with the first shunt box and the second shunt box; when the electric vehicle passes through a bumpy section, hydraulic oil is filled into the first chamber located above the first piston plate inside the piston cylinder to drive the piston cylinder and the chassis bracket to rise; when the electric vehicle passes through a flat section and travels at high speed, hydraulic oil in the first chamber is extracted to drive the piston cylinder and the chassis bracket to descend.

[0008] As a preferred embodiment of the present invention: the front lifting guide rail includes a first mounting frame fixedly mounted on the base plate, a first lifting seat is slidably mounted on the first mounting frame, the first lifting seat is fixedly connected to the first diversion box, a first connecting seat is fixedly mounted on the first lifting seat, a mounting seat is fixedly mounted on the first connecting seat, and the front wheel is rotatably mounted on the mounting seat.

[0009] As a preferred embodiment of the present invention: a commutator is fixedly mounted on the base plate, a first connecting plate is fixedly mounted on the adjusting end of the commutator, a second connecting plate is rotatably mounted on the mounting seat, a connecting column is fixedly mounted on the second connecting plate, and the connecting column is slidably mounted with the first connecting plate.

[0010] As a preferred embodiment of the present invention: the rear lifting guide rail includes a second mounting frame fixedly mounted on the base plate, a second lifting seat is slidably mounted on the second mounting frame, the second lifting seat is fixedly connected to the second diverter box, a mounting shaft is fixedly mounted on the rear wheel, and the mounting shaft is rotatably connected to the second lifting seat.

[0011] As a preferred embodiment of the present invention: a spline sleeve is rotatably installed on the top of the second diverter box, and the spline sleeve rotates synchronously with the mounting shaft through a first bevel gear set, a spline shaft is slidably connected to the spline sleeve, and the spline shaft is rotatably connected to the second mounting frame, a motor outer box is fixedly installed on the bottom plate, a drive motor is fixedly installed in the motor outer box, a drive shaft is fixedly installed on the output end of the drive motor, and the drive shaft rotates synchronously with the spline shaft through a second bevel gear set.

[0012] As a preferred embodiment of the present invention: a hydraulic oil tank is fixedly installed on the base plate, and the hydraulic oil tank is provided with two groups, and the two groups of hydraulic oil tanks are connected through a connecting oil pipe, an oil pump is fixedly installed on the base plate, and the input end of the oil pump is connected to the hydraulic oil tank, and an oil pipe group is fixedly installed on the base plate, and the oil inlet of the input end of the oil pipe group is connected to the output end of the oil pump, and the oil pipe group is connected with multiple groups of first chambers, and one of the ports of the oil pipe group is fixedly installed with a control valve, and the control valve is connected to the hydraulic oil tank; start the oil pump, close the control valve, and the oil pump inputs hydraulic oil into the inside of the first chamber; close the oil pump, open the control valve, and the hydraulic oil in the first chamber flows back into the hydraulic oil tank; the oil inlet ends of the first diverter box and the second diverter box are both fixedly installed with oil inlet pipes, and the oil inlet pipes are connected with both ends of the hydraulic oil tank; the oil outlet ends of the first diverter box and the second diverter box are both fixedly installed with oil drain pipes, and the oil drain pipes are connected with the middle section of the hydraulic oil tank.

[0013] As a preferred embodiment of the present invention: a heat conductive sheet is fixedly installed in the hydraulic oil tank, a ventilation pipe is fixedly installed at the bottom of the base plate, a guide sheet for guiding air to the inside of the ventilation pipe is fixedly installed at the bottom of the base plate, and the bottom of the heat conductive sheet extends into the ventilation pipe.

[0014] As a preferred embodiment of the present invention: a sealed box is fixedly installed on the bottom plate, a heat-conducting grid box is fixedly installed in the sealed box, the battery is fixedly installed in the frame of the heat-conducting grid box, a semiconductor refrigerator is fixedly installed on the sealed box, the cooling end of the semiconductor refrigerator is attached to the heat-conducting grid box, a heat-conducting box is fixedly installed on the top of the bottom plate, the heat-conducting box is connected with a connecting oil pipe, and the heat-releasing end of the semiconductor refrigerator extends into the heat-conducting box and contacts with the hydraulic oil.

[0015] Compared with the prior art, the present invention provides a chassis of an electric vehicle, which has the following beneficial effects: The parts not involved in the device are the same as the prior art or can be implemented by the prior art. By adjusting the chassis height, the present invention can enable the vehicle to better adapt to different road conditions, reduce bumps, and improve ride comfort. Specifically, in off-road or complex terrain, increasing the chassis height helps to increase the vehicle's passability, avoid collision between the chassis and ground obstacles, avoid damage to the chassis, and prevent the battery pack from being damaged and spontaneously combusting. When driving at high speed on a flat road such as an expressway, by lowering the chassis height, the center of gravity of the vehicle is lowered, and the stability of the vehicle's high-speed movement is improved. At the same time, air resistance can be reduced, vehicle energy efficiency can be improved, and energy consumption can be reduced. At the same time, the heat generated by the battery is used to preheat the hydraulic oil in a low temperature environment, so that the hydraulic oil is maintained at the required operating temperature, and the viscosity of the hydraulic oil is prevented from decreasing or increasing, thereby avoiding a reduction in the shock absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the three-dimensional structure of the chassis of an electric vehicle proposed by the present invention Figure 1 ; Figure 2 This is a schematic diagram of the structure of a chassis heat-conducting grid box of an electric vehicle proposed by the present invention; Figure 3 This is a structural schematic diagram of a chassis bottom plate of an electric vehicle proposed by the present invention; Figure 4 A schematic diagram of the three-dimensional structure of the chassis of an electric vehicle proposed by the present invention Figure 2 ; Figure 5 for Figure 4 A schematic diagram of the enlarged structure of part A; Figure 6 This is a schematic diagram of the structure of a chassis hydraulic oil tank of an electric vehicle proposed by the present invention; Figure 7 This is a schematic diagram of the structure of a rear lifting guide rail of a chassis of an electric vehicle proposed by the present invention; Figure 8 This is a schematic structural diagram of a chassis vent pipe of an electric vehicle proposed by the present invention; Fig. 9 The present invention is a schematic structural diagram of a first lifting suspension of a chassis of an electric vehicle.

[0017] In the figure: 1, bottom plate; 2, guard plate; 3, reinforcement plate; 4, cover plate; 5, commutator; 6, first connecting plate; 7, first mounting frame; 8, first lifting seat; 9, first connecting seat; 10, mounting seat; 1001, front wheel; 11, second connecting plate; 12, connecting column; 13, first lifting suspension; 1301, piston cylinder; 1302, first piston plate; 1303, second piston plate; 1304, shock-absorbing spring; 1305, piston rod; 1306, oil hole; 14, first shunt box; 15, motor outer box; 16, drive shaft; 1 7. Second mounting frame; 18. Second lifting seat; 19. Second lifting suspension; 20. Second diverter box; 21. Splined sleeve shaft; 22. Rear wheel; 221. Mounting shaft; 23. First bevel gear set; 24. Splined shaft; 25. Second bevel gear set; 26. Sealing box; 27. Heat-conducting mesh box; 28. Semiconductor refrigerator; 29. ​​Hydraulic oil tank; 30. Oil pipe group; 31. Connecting oil pipe; 32. Oil pump; 33. Oil drain pipe; 34. Oil inlet pipe; 35. Heat-conducting box; 36. Heat-conducting plate; 37. Guide plate; 38. Ventilation pipe; 39. Control valve. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] Example: Refer to Figure 1-Figure 9 A chassis of an electric vehicle, comprising a chassis support, a front wheel 1001 and a rear wheel 22, and further comprising: a front lifting rail and a rear lifting rail, wherein the front lifting rail is fixedly mounted on the front end of a side wall of the chassis support, and the rear lifting rail is fixedly mounted on the rear end of the side wall of the chassis support, the front wheel 1001 is arranged on the front lifting rail, and the rear wheel 22 is arranged on the rear lifting rail; a first lifting suspension 13 and a second lifting suspension 19, wherein the first lifting suspension 13 is fixedly mounted on the front end of the side wall of the chassis support, and the output end of the first lifting suspension 13 is fixedly mounted There is a first shunt box 14, which is fixedly connected to the front lifting guide rail, a second lifting suspension 19 is fixedly installed at the rear end of the side wall of the chassis bracket, and a second shunt box 20 is fixedly installed at the output end of the second lifting suspension 19, and the second shunt box 20 is fixedly connected to the rear lifting guide rail; when the electric vehicle passes through a bumpy section, the first lifting suspension 13 and the second lifting suspension 19 drive the chassis bracket to rise; when the electric vehicle passes through a flat section and travels at high speed, the first lifting suspension 13 and the second lifting suspension 19 drive the chassis bracket to descend.

[0021] In this embodiment, by adjusting the chassis height, the vehicle can better adapt to different road conditions, reduce bumps, and improve ride comfort. In particular, in off-road or complex terrain, increasing the chassis height helps the vehicle to pass, avoid collision between the chassis and ground obstacles, avoid damage to the chassis, and prevent the battery pack from being damaged and spontaneously combusting. When driving at high speed on a flat road such as a highway, by lowering the chassis height, the center of gravity of the vehicle is lowered, and the stability of the vehicle's high-speed movement is improved, air resistance can be reduced, vehicle energy efficiency can be improved, and energy consumption can be reduced.

[0022] Reference Figure 3 The chassis bracket includes an integrally formed bottom plate 1, a guard plate 2 is fixedly installed at the bottom of the bottom plate 1, four groups of reinforcing plates 3 are fixedly installed inside the guard plate 2, and the four groups of reinforcing plates 3 are intersected and welded to form an "X" shape, and a covering plate 4 is fixedly installed on the bottom plate 1.

[0023] In this embodiment, the base plate 1 manufactured by the one-piece molding technology not only improves the integrity and strength of the structure, but also reduces welding points, thereby reducing stress concentration and potential crack risks caused by welding.

[0024] Among them, the design of the guard plate 2 adds a protective layer to the bottom of the chassis bracket to prevent the bottom from being directly impacted or worn during driving. In addition, the guard plate 2 cooperates with the "X"-shaped reinforcement plate 3 to provide uniform support and reinforcement in multiple directions, so that the chassis bracket can maintain high rigidity and stability when bearing various complex loads, thereby improving the protection effect on the battery and preventing the battery from colliding with the ground or protruding objects on the ground and being damaged.

[0025] Reference Figure 1-Figure 5 , Figure 7 and Fig. 9 The first lifting suspension 13 and the second lifting suspension 19 both include a piston cylinder 1301 fixedly mounted on the bottom plate 1, a first piston plate 1302 and a second piston plate 1303 are slidably connected in the piston cylinder 1301, the first piston plate 1302 is arranged above the second piston plate 1303, a damping spring 1304 is arranged between the first piston plate 1302 and the second piston plate 1303, the two ends of the damping spring 1304 are respectively fixedly connected to the first piston plate 1302 and the second piston plate 1303, a piston rod 1305 is fixedly mounted at the bottom of the second piston plate 1303, and the two groups of piston rods 1305 are respectively connected to the first diversion box 14 and The second diverter box 20 is fixedly connected, and a second chamber is arranged between the first piston plate 1302 and the second piston plate 1303. Both groups of piston rods 1305 are provided with oil holes 1306 connected with the second chamber, and the two groups of oil holes 1306 are connected with the first diverter box 14 and the second diverter box 20 respectively; when the electric vehicle passes through a bumpy section, hydraulic oil is filled into the first chamber above the first piston plate 1302 inside the piston cylinder 1301 to drive the piston cylinder 1301 and the chassis bracket to rise; when the electric vehicle passes through a flat section and travels at high speed, the hydraulic oil inside the first chamber is extracted to drive the piston cylinder 1301 and the chassis bracket to descend.

[0026] In this embodiment, by controlling the amount of hydraulic oil entering the first chamber, the distance between the first piston plate 1302 and the top of the piston cylinder 1301 is controlled, so that the piston cylinder 1301 can be driven to rise or fall on the carrying base plate 1, thereby adjusting the height of the chassis.

[0027] In addition, during the operation of the vehicle, the vibration caused by the bumps of the vehicle is transmitted to the piston rod 1305, so that the piston rod 1305 drives the second piston plate 1303 to rise and fall. During this process, the shock-absorbing spring 1304 contracts back and forth. In addition, the hydraulic oil in the second chamber is discharged from the second chamber through the oil hole 1306 and the hydraulic oil is sucked into the second chamber. During this process, the shock-absorbing spring 1304 can not only absorb and disperse the impact energy from the road surface and reduce the impact of vibration on the vehicle and passengers, but also balance the movement of the second piston plate 1303 through its reciprocating contraction to maintain the stability of the system. At the same time, as the second piston plate 1303 With the up and down movement, the hydraulic oil in the second chamber (i.e., the space between the first piston plate 1302 and the second piston plate 1303) will also flow accordingly. When the second piston plate 1303 rises, the volume of the second chamber decreases, and the hydraulic oil is discharged to the first diverter box 14 or the second diverter box 20 (depending on which lifting suspension is working) through the oil hole 1306. On the contrary, when the second piston plate 1303 descends, the volume of the second chamber increases, and the hydraulic oil is sucked into the second chamber through the oil hole 1306. This flow of hydraulic oil not only realizes the transfer and conversion of energy, but also further suppresses the transmission of vibration through the damping effect of the hydraulic system.

[0028] In summary, the lifting suspension design realizes dynamic adjustment of the chassis height and vibration suppression during driving by combining the shock-absorbing principle of hydraulic transmission and shock-absorbing spring 1304, which not only improves the driving stability and comfort of the vehicle, but also enhances the vehicle's adaptability to different road conditions.

[0029] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 The front lifting guide rail includes a first mounting frame 7 fixedly mounted on the base plate 1, a first lifting seat 8 is slidably mounted on the first mounting frame 7, the first lifting seat 8 is fixedly connected to the first shunt box 14, a first connecting seat 9 is fixedly mounted on the first lifting seat 8, a mounting seat 10 is fixedly mounted on the first connecting seat 9, the front wheel 1001 is rotatably mounted on the mounting seat 10, a commutator 5 is fixedly mounted on the base plate 1, a first connecting plate 6 is fixedly mounted on the adjusting end of the commutator 5, a second connecting plate 11 is rotatably mounted on the mounting seat 10, a connecting column 12 is fixedly mounted on the second connecting plate 11, and the connecting column 12 is slidably mounted with the first connecting plate 6.

[0030] In this embodiment, the first connecting plate 6 is driven to move to the left (or to the right) by the commutator 5 (the adjusting end of the commutator 5 is the car steering wheel). During the movement of the first connecting plate 6, the second connecting plate 11 is dragged by the connecting column 12. The second connecting plate 11 drags the mounting seat 10 to rotate axially about the axis of the connecting shaft between the first connecting seat 9 and the mounting seat 10, thereby adjusting the angle of the front wheel 1001, which is further used to control the driving direction of the vehicle.

[0031] When the chassis rises or falls, the first connecting plate 6 and the connecting column 12 slide relative to each other, thereby ensuring the control of the direction of the vehicle during and after the chassis adjustment.

[0032] Reference Figure 1 , Figure 2 and Figure 5 The rear lifting guide rail includes a second mounting frame 17 fixedly mounted on the base plate 1, a second lifting seat 18 is slidably mounted on the second mounting frame 17, the second lifting seat 18 is fixedly connected to the second shunt box 20, a mounting shaft 221 is fixedly mounted on the rear wheel 22, the mounting shaft 221 is rotatably connected to the second lifting seat 18, a spline sleeve shaft 21 is rotatably mounted on the top of the second shunt box 20, the spline sleeve shaft 21 rotates synchronously with the mounting shaft 221 through the first bevel gear set 23, a spline shaft 24 is slidably connected to the spline sleeve shaft 21, the spline shaft 24 is rotatably connected to the second mounting frame 17, a motor outer box 15 is fixedly mounted on the base plate 1, a driving motor is fixedly mounted in the motor outer box 15, a driving shaft 16 is fixedly mounted on the output end of the driving motor, and the driving shaft 16 rotates synchronously with the spline shaft 24 through the second bevel gear set 25.

[0033] In this embodiment, the drive motor is started, and the drive motor drives the second bevel gear set 25 to rotate through the drive shaft 16, the second bevel gear set 25 drives the spline shaft 24 to rotate, the spline shaft 24 drives the spline sleeve shaft 21 to rotate, and the spline sleeve shaft 21 drives the mounting shaft 221 to rotate through the first bevel gear set 23, thereby driving the rear wheel 22 to rotate, thereby driving the vehicle to move.

[0034] In the process of lifting and lowering the chassis, the spline sleeve shaft 21 and the spline shaft 24 slide against each other, thereby maintaining the transmission between the rear wheel 22 and the motor, thereby ensuring that the vehicle can travel normally at any chassis height.

[0035] Reference Figure 1 , Figure 2 and Figure 6A hydraulic oil tank 29 is fixedly mounted on the bottom plate 1. The hydraulic oil tank 29 is provided with two groups. The two groups of hydraulic oil tanks 29 are connected through a connecting oil pipe 31. An oil pump 32 is fixedly mounted on the bottom plate 1. The input end of the oil pump 32 is connected to the hydraulic oil tank 29. An oil pipe group 30 is fixedly mounted on the bottom plate 1. The oil inlet of the input end of the oil pipe group 30 is connected to the output end of the oil pump 32. The oil pipe group 30 is connected to the plurality of first chambers. A control valve 39 is fixedly mounted on one of the ports of the oil pipe group 30. The control valve 39 is connected to the hydraulic oil tank 29. connected; start the oil pump 32, close the control valve 39, and the oil pump 32 inputs hydraulic oil into the first chamber; close the oil pump 32, open the control valve 39, and the hydraulic oil in the first chamber flows back into the hydraulic oil tank 29; the oil inlet ends of the first diverter box 14 and the second diverter box 20 are fixedly installed with an oil inlet pipe 34, and the oil inlet pipe 34 is connected to the two ends of the hydraulic oil tank 29; the oil outlet ends of the first diverter box 14 and the second diverter box 20 are fixedly installed with an oil drain pipe 33, and the oil drain pipe 33 is connected to the middle section of the hydraulic oil tank 29.

[0036] Among them, the hydraulic oil tank 29 serves as the energy storage and oil supply device of the entire hydraulic system. The two groups of hydraulic oil tanks 29 are interconnected by a connecting oil pipe 31, ensuring that the hydraulic oil is evenly distributed between the two groups of oil tanks, avoiding performance problems caused by uneven distribution of hydraulic oil. In addition, the oil pump 32 is the power source of the hydraulic system. Its input end is connected to the hydraulic oil tank 29 and is responsible for extracting hydraulic oil from the tank. The output end of the oil pump 32 is connected to the input end of the oil pipe group 30. The oil pipe group 30 serves as a hydraulic oil distribution pipeline, and its multiple ports are respectively connected to multiple groups of first chambers (i.e., the space above the first piston plate 1302), thereby realizing the precise delivery of hydraulic oil to each lifting mechanism.

[0037] In addition, in order to control the flow direction of the hydraulic oil, a control valve 39 is provided in the system. The control valve 39 is installed on a port of the oil pipe group 30 and is connected to the hydraulic oil tank 29. By opening and closing the control valve 39, precise control of the flow direction of the hydraulic oil can be achieved.

[0038] Specifically, when the chassis needs to be lifted, the oil pump 32 is started and the control valve 39 is closed. The oil pump 32 delivers the hydraulic oil into each first chamber through the oil pipe group 30, thereby driving the piston cylinder 1301 to rise; when the chassis needs to be lowered, the oil pump 32 is closed and the control valve 39 is opened. The hydraulic oil in the first chamber flows back to the hydraulic oil tank 29 through the oil pipe group 30 and the control valve 39, and the piston cylinder 1301 drops accordingly.

[0039] In addition, in order to realize the recycling and heat dissipation of hydraulic oil, an oil inlet pipe 34 and an oil drain pipe 33 are also provided in the system. The oil inlet pipe 34 is respectively connected to the oil inlet ends of the first diverter box 14 and the second diverter box 20 and the two ends of the hydraulic oil tank 29, so as to provide fresh hydraulic oil to the diverter box; the oil drain pipe 33 is connected to the oil outlet end of the diverter box and the middle section of the hydraulic oil tank 29, so as to discharge the used hydraulic oil in the diverter box back to the tank for recycling. This not only improves the utilization rate of the hydraulic oil, but also helps to reduce the operating temperature of the system in a high temperature environment, thereby improving the stability and life of the system.

[0040] Reference Figure 6 and Figure 8 A heat conducting sheet 36 is fixedly installed in the hydraulic oil tank 29 , a ventilation pipe 38 is fixedly installed at the bottom of the base plate 1 , a guide sheet 37 for guiding air into the ventilation pipe 38 is fixedly installed at the bottom of the base plate 1 , and the bottom of the heat conducting sheet 36 extends into the ventilation pipe 38 .

[0041] The heat conducting sheet 36 is a highly efficient heat conducting material, which can effectively transfer the heat of the oil in the oil tank to the vent pipe 38. During the driving of the vehicle, the air flowing relative to the vehicle is guided into the vent pipe 38 through the guide sheet 37 and contacts the heat conducting sheet 36, thereby improving the heat dissipation effect of the hydraulic oil.

[0042] Reference Figure 2 , Figure 6 and Figure 8 A sealed box 26 is fixedly installed on the bottom plate 1, a heat-conducting grid box 27 is fixedly installed in the sealed box 26, the battery is fixedly installed in the frame of the heat-conducting grid box 27, a semiconductor refrigerator 28 is fixedly installed on the sealed box 26, the cooling end of the semiconductor refrigerator 28 is in contact with the heat-conducting grid box 27, a heat-conducting box 35 is fixedly installed on the top of the bottom plate 1, the heat-conducting box 35 is connected with the connecting oil pipe 31, and the heat-releasing end of the semiconductor refrigerator 28 extends into the heat-conducting box 35 and contacts with the hydraulic oil.

[0043] The heat of the battery is transferred to the hydraulic oil through the cooperation of the semiconductor cooler 28 and the heat-conducting grid box 27. The cooperation of the semiconductor cooler 28, the hydraulic oil and the heat-conducting grid box 27 not only realizes the high-speed heat dissipation of the battery in a sealed environment, but also in a low-temperature environment, the heat generated by the battery can preheat the hydraulic oil, so that the hydraulic oil can quickly reach the optimal temperature required for work.

[0044] In this embodiment, firstly, the sealed box 26 provides a safe, dust-free, and humidity-free operating environment for the battery, which helps to extend the service life and stability of the battery, while the heat-conducting mesh box 27 serves as a thermal bridge between the battery and the semiconductor refrigerator 28, which quickly conducts the heat generated by the battery to the cooling end of the semiconductor refrigerator 28, which not only ensures the effective heat dissipation of the battery under high-speed operation or high load, but also avoids the performance degradation or safety hazards that may be caused by the accumulation of heat inside the battery.

[0045] Secondly, under normal working conditions, the cooling end of the semiconductor refrigerator 28 absorbs the heat transferred from the heat-conducting mesh box 27, and releases the heat to the hydraulic oil in the heat-conducting box 35 through its heat-releasing end. In this way, the heat of the battery is effectively transferred to the hydraulic system, which not only realizes the heat dissipation of the battery, but also provides an additional heat source for the hydraulic system. In a low temperature environment, the viscosity of the hydraulic oil will increase with the decrease in temperature, thereby affecting the performance and efficiency of the hydraulic system. By preheating the hydraulic oil with the heat generated by the battery, the temperature of the hydraulic oil can be quickly increased to the optimal state required for work. This not only reduces the startup time of the hydraulic system, but also improves the adaptability and stability of the system under different environmental conditions.

[0046] By controlling the current on the semiconductor refrigerator 28, the temperature difference between its cooling end and heat release end can be directly affected, thereby controlling the heat conduction rate from the battery to the hydraulic oil. When the battery needs to dissipate heat quickly, the current can be increased to improve the cooling efficiency. In a low-temperature environment, in order to maintain the appropriate temperature of the hydraulic oil, the heat release rate can be controlled by adjusting the current, thereby automatically adjusting the working state according to actual needs and environmental conditions to achieve the optimal thermal management effect.

[0047] When the hydraulic oil temperature is too high and affects shock absorption, the heat release rate of the semiconductor refrigerator 28 can be reduced, and other cooling equipment (such as fans, hydraulic oil circulation pumps, etc.) can be used to cool the battery, and the hydraulic oil can be quickly cooled through the ventilation pipe 38.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A chassis of an electric vehicle, comprising a chassis bracket, a front wheel (1001) and a rear wheel (22), characterized in that: Also includes: A front lifting guide rail and a rear lifting guide rail, the front lifting guide rail being fixedly mounted on the front end of the side wall of the chassis support, the rear lifting guide rail being fixedly mounted on the rear end of the side wall of the chassis support, the front wheel (1001) being arranged on the front lifting guide rail, and the rear wheel (22) being arranged on the rear lifting guide rail; A first lifting suspension (13) and a second lifting suspension (19), wherein the first lifting suspension (13) is fixedly mounted on the front end of the side wall of the chassis bracket, and a first shunt box (14) is fixedly mounted on the output end of the first lifting suspension (13), and the first shunt box (14) is fixedly connected to the front lifting guide rail; the second lifting suspension (19) is fixedly mounted on the rear end of the side wall of the chassis bracket, and a second shunt box (20) is fixedly mounted on the output end of the second lifting suspension (19), and the second shunt box (20) is fixedly connected to the rear lifting guide rail; When the electric vehicle passes through a bumpy road section, the first lifting suspension (13) and the second lifting suspension (19) drive the chassis bracket to rise; When the electric vehicle passes through a flat road section and travels at high speed, the first lifting suspension (13) and the second lifting suspension (19) drive the chassis bracket to descend.

2. The chassis of an electric vehicle according to claim 1, characterized in that: The chassis bracket comprises an integrally formed bottom plate (1), a guard plate (2) is fixedly mounted on the bottom of the bottom plate (1), four groups of reinforcing plates (3) are fixedly mounted inside the guard plate (2), the four groups of reinforcing plates (3) are intersected and welded to form an "X" shape, and a covering plate (4) is fixedly mounted on the bottom plate (1).

3. The chassis of an electric vehicle according to claim 2, characterized in that: The first lifting suspension (13) and the second lifting suspension (19) both comprise a piston cylinder (1301) fixedly mounted on the base plate (1), wherein a first piston plate (1302) and a second piston plate (1303) are slidably connected in the piston cylinder (1301), wherein the first piston plate (1302) is arranged above the second piston plate (1303), and a shock absorbing spring (1304) is arranged between the first piston plate (1302) and the second piston plate (1303), wherein two ends of the shock absorbing spring (1304) are respectively connected to the first piston plate (1302) and the second piston plate (1303). The second piston plate (1303) is fixedly connected, a piston rod (1305) is fixedly installed at the bottom of the second piston plate (1303), two groups of the piston rods (1305) are respectively fixedly connected to the first diverter box (14) and the second diverter box (20), a second chamber is provided between the first piston plate (1302) and the second piston plate (1303), and the two groups of piston rods (1305) are both provided with oil holes (1306) connected to the second chamber, and the two groups of the oil holes (1306) are respectively connected to the first diverter box (14) and the second diverter box (20); When the electric vehicle passes through a bumpy road section, hydraulic oil is filled into the first chamber located above the first piston plate (1302) inside the piston cylinder (1301), driving the piston cylinder (1301) and the chassis bracket to rise; When the electric vehicle passes through a flat road section and travels at high speed, the hydraulic oil inside the first chamber is extracted to drive the piston cylinder (1301) and the chassis bracket to descend.

4. The chassis of an electric vehicle according to claim 2, characterized in that: The front lifting guide rail comprises a first mounting frame (7) fixedly mounted on the base plate (1); a first lifting seat (8) is slidably mounted on the first mounting frame (7); the first lifting seat (8) is fixedly connected to a first diverter box (14); a first connecting seat (9) is fixedly mounted on the first lifting seat (8); a mounting seat (10) is fixedly mounted on the first connecting seat (9); and the front wheel (1001) is rotatably mounted on the mounting seat (10).

5. The chassis of an electric vehicle according to claim 4, characterized in that: A commutator (5) is fixedly mounted on the base plate (1), a first connecting plate (6) is fixedly mounted on the adjusting end of the commutator (5), a second connecting plate (11) is rotatably mounted on the mounting seat (10), a connecting column (12) is fixedly mounted on the second connecting plate (11), and the connecting column (12) is slidably mounted on the first connecting plate (6).

6. The chassis of an electric vehicle according to claim 2, characterized in that: The rear lifting guide rail comprises a second mounting frame (17) fixedly mounted on the base plate (1); a second lifting seat (18) is slidably mounted on the second mounting frame (17); the second lifting seat (18) is fixedly connected to a second diverter box (20); a mounting shaft (221) is fixedly mounted on the rear wheel (22); and the mounting shaft (221) is rotatably connected to the second lifting seat (18).

7. The chassis of an electric vehicle according to claim 6, characterized in that: A spline sleeve shaft (21) is rotatably mounted on the top of the second shunt box (20), and the spline sleeve shaft (21) rotates synchronously with the mounting shaft (221) via a first bevel gear set (23). A spline shaft (24) is slidably connected to the spline sleeve shaft (21), and the spline shaft (24) is rotatably connected to the second mounting frame (17). A motor outer box (15) is fixedly mounted on the bottom plate (1), and a drive motor is fixedly mounted inside the motor outer box (15). A drive shaft (16) is fixedly mounted on the output end of the drive motor, and the drive shaft (16) rotates synchronously with the spline shaft (24) via a second bevel gear set (25).

8. The chassis of an electric vehicle according to claim 3, characterized in that: A hydraulic oil tank (29) is fixedly mounted on the base plate (1), and the hydraulic oil tank (29) is provided with two groups. The two groups of hydraulic oil tanks (29) are connected via a connecting oil pipe (31). An oil pump (32) is fixedly mounted on the base plate (1), and the input end of the oil pump (32) is connected to the hydraulic oil tank (29). An oil pipe group (30) is fixedly mounted on the base plate (1), and the oil inlet of the input end of the oil pipe group (30) is connected to the output end of the oil pump (32). The oil pipe group (30) is connected to a plurality of groups of first chambers. A control valve (39) is fixedly mounted on one of the ports of the oil pipe group (30), and the control valve (39) is connected to the hydraulic oil tank (29); The oil pump (32) is started, and the control valve (39) is closed, so that the oil pump (32) inputs hydraulic oil into the first chamber; Turn off the oil pump (32), open the control valve (39), and allow the hydraulic oil in the first chamber to flow back into the hydraulic oil tank (29); An oil inlet pipe (34) is fixedly mounted on the oil inlet ends of the first flow diverter box (14) and the second flow diverter box (20), and the oil inlet pipe (34) is connected to both ends of the hydraulic oil tank (29); An oil discharge pipe (33) is fixedly mounted on the oil outlet ends of the first flow diverter box (14) and the second flow diverter box (20), and the oil discharge pipe (33) is connected to the middle section of the hydraulic oil tank (29).

9. The chassis of an electric vehicle according to claim 8, characterized in that: A heat conducting sheet (36) is fixedly mounted in the hydraulic oil tank (29), a vent pipe (38) is fixedly mounted at the bottom of the base plate (1), a guide sheet (37) for guiding air into the vent pipe (38) is fixedly mounted at the bottom of the base plate (1), and the bottom of the heat conducting sheet (36) extends into the vent pipe (38).

10. The chassis of an electric vehicle according to claim 8, characterized in that: A sealed box (26) is fixedly mounted on the bottom plate (1), a heat-conducting grid box (27) is fixedly mounted inside the sealed box (26), a battery is fixedly mounted in a frame of the heat-conducting grid box (27), a semiconductor refrigerator (28) is fixedly mounted on the sealed box (26), a cooling end of the semiconductor refrigerator (28) is in contact with the heat-conducting grid box (27), a heat-conducting box (35) is fixedly mounted on the top of the bottom plate (1), the heat-conducting box (35) is connected to a connecting oil pipe (31), and a heat-releasing end of the semiconductor refrigerator (28) extends into the heat-conducting box (35) to contact hydraulic oil.

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