A power assembly for an electrically powered four-wheeled vehicle

Abstract

The application discloses a power assembly of an electric four-wheeled vehicle and belongs to the field of electric four-wheeled vehicles. The power assembly of the electric four-wheeled vehicle comprises a bottom plate, a driving part is fixed on the top of the bottom plate, a driving shaft is fixed on the output end of the driving part, a fan blade is arranged on the top of the bottom plate and on one side of the driving part, a power assembly for driving the fan blade to rotate is connected to the surface of the driving shaft, and a jet head is arranged on one side of the power assembly. Through the cooperation of the driving shaft, the fan blade, the power assembly, the jet head, the reciprocating assembly and the cleaning assembly, the power source generated by the rotation of the driving shaft is fully utilized, the fan blade blows the cold air to the surface of the driving part uniformly, the heat dissipation and cooling effect is good, the service life of the driving part is effectively prolonged, dust and foreign matters accumulated at the heat dissipation port are timely blown back and cleaned, the air circulation inside the bottom plate is maintained, and the operation is convenient.

Description

Technical Field

[0001] This invention relates to the field of electric four-wheeled vehicle technology, and more particularly to a powertrain for an electric four-wheeled vehicle. Background Technology

[0002] Motor vehicles are divided into electric vehicles (two-wheeled, three-wheeled, and four-wheeled electric cars) and vehicles powered by engines. Electric vehicles are driven by onboard power batteries. Due to their energy-saving, environmentally friendly, and lightweight characteristics, as well as their low operating costs, electric vehicles are receiving increasing attention. Currently, electric four-wheeled vehicles all adopt a mid-mounted motor and rear-drive configuration. That is, the electric motor transmits power to the rear axle through a chain, belt, or shaft. The rear axle half-shaft rotates and then transmits power to the rear wheels, which are the drive wheels. This configuration has advantages such as stable driving, strong climbing power, and strong adaptability to road conditions. Therefore, it has always been regarded as the optimal structure by the industry.

[0003] In existing electric four-wheeled vehicles, the motor is first powered by a power battery. The power generated by the motor's rotation is then transmitted through a series of mechanical transmissions, which inevitably leads to transmission losses. This means that the engine's power is not fully utilized. Furthermore, the motor generates heat during the power generation process and is generally installed in a sealed enclosure, which has poor heat dissipation performance and is prone to malfunctions. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art where the power generated by the rotation of the motor inevitably leads to transmission losses after a series of mechanical transmissions, so that the power of the engine is not fully utilized. In addition, the motor generates heat during the power generation process and is generally installed in a sealed box with poor heat dissipation performance, which easily leads to malfunctions. Therefore, this invention proposes a powertrain for an electric four-wheeled vehicle.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An electric four-wheeled vehicle powertrain includes a base plate, a drive unit fixed to the top of the base plate, a drive shaft fixed to the output end of the drive unit, a fan blade disposed on one side of the drive unit above the base plate, a power component for driving the fan blade to rotate being linked to the surface of the drive shaft, a jet nozzle disposed on one side of the power component, a reciprocating component for driving the jet nozzle to reciprocate being linked to the power component, a cleaning component being linked to the reciprocating component, a protective cover fixed to the top of the base plate, and a heat dissipation vent being provided on the surface of the protective cover.

[0007] Preferably, the power assembly includes a first rotating wheel fixed to the surface of the drive shaft, a second rotating wheel driven by a belt on the surface of the first rotating wheel, a rotating rod fixed at the axis of the second rotating wheel, a fixed block fixedly connected to the base plate via a bearing on the surface of the rotating rod, a worm gear fixed at one end of the rotating rod, a turbine meshing on the surface of the worm gear, a connecting shaft fixed at the axis of the turbine, the end of the connecting shaft passing through the mounting frame and fixedly connected to the fan blade, and the bottom of the mounting frame fixedly connected to the base plate.

[0008] Preferably, a third rotating wheel is fixed to the surface of the connecting shaft, and a fourth rotating wheel is driven to the surface of the third rotating wheel via a belt. One end of the fourth rotating wheel is rotatably connected to the support plate via a bearing. The end of the support plate is fixedly connected to the base plate. A connecting rod is fixed at the axis of the support plate, and a cam is fixed at the end of the connecting rod. A pressing plate is attached to the surface of the cam. A moving rod is fixed to one side surface of the pressing plate, and a mounting block is fixed to the end of the moving rod. The jet head is embedded in the mounting block, and a sliding rod is fixed to the bottom of the mounting block.

[0009] Preferably, a compression spring is fixed to one side surface of the slide rod, and a limiting plate that is fixedly connected to the base plate is fixed to the end of the compression spring. The bottom of the slide rod is slidably connected in a slide groove, and the slide groove is opened on the top surface of the base plate.

[0010] Preferably, a pull rod is fixed to the surface of the movable rod, an air cylinder is slidably connected to the surface of the pull rod, the bottom of the air cylinder is fixedly connected to the base plate, a piston is fixed to one end of the pull rod, the piston is slidably connected inside the air cylinder, an air supply pipe is fixed to one side surface of the air cylinder, an air supply plate is fixed to the end of the air supply pipe, air nozzles are fixed to the surface of the air supply plate at equal intervals, and a support block fixedly connected to the base plate is fixed to the bottom of the air supply plate.

[0011] Preferably, a gas collection hood is fixed to one side surface of the mounting bracket, and a hose is fixed to one end of the gas collection hood, with the end of the hose being fixedly connected to the jet head.

[0012] Preferably, a dustproof mesh is fixed inside the heat dissipation vent, and a conduit is fixed to one side surface of the protective cover.

[0013] Preferably, a rear axle bracket is fixed to one side surface of the base plate, and the surface of the drive shaft is rotatably connected to the rear axle bracket via a bearing.

[0014] Preferably, a helical gear is fixed to the end of the drive shaft, and a meshing gear is engaged on the surface of the helical gear. A rotating shaft is fixed at the center of each of the two meshing gears, and the end of the rotating shaft is rotatably connected to the rear axle bracket through a bearing.

[0015] Compared with the prior art, the present invention provides a powertrain for an electric four-wheeled vehicle, which has the following beneficial effects:

[0016] 1. The powertrain of this electric four-wheeled vehicle, through the power component set on the drive shaft, facilitates the rotation of the fan blades, thereby disturbing the air inside the base plate, blowing away the heat generated on the surface of the drive unit, ventilating and dissipating heat, and thus extending the service life of the drive unit.

[0017] 2. The powertrain of this electric four-wheeled vehicle, through the cooperation of the power component, fan blades and reciprocating component, blows the cool air generated by the rotation of the fan blades back and forth on the surface of the drive unit through the jet head, so that the surface of the drive unit is cooled more evenly and the heat dissipation effect of the drive unit is improved.

[0018] 3. The powertrain of this electric four-wheeled vehicle, through the cooperation of the reciprocating component and the cleaning component, uses the power generated by the reciprocating operation of the reciprocating component to drive the cleaning component to back-blow the heat dissipation vents, sweep away the dust and foreign objects accumulated at the heat dissipation vents, and keep the air flow inside the bottom plate smooth.

[0019] The parts not mentioned in this device are the same as or can be implemented using existing technologies. This invention, through the cooperation of the drive shaft, fan blades, power components, jet head, reciprocating components and cleaning components, makes full use of the power source generated by the rotation of the drive shaft, so that the fan blades blow cold air evenly to the surface of the drive unit, resulting in good heat dissipation and cooling effect, effectively improving the service life of the drive unit. At the same time, it promptly back-blown cleans the dust and foreign objects accumulated at the heat dissipation vents, maintaining air circulation inside the base plate, and is easy to operate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the powertrain structure of an electric four-wheeled vehicle proposed in this invention;

[0021] Figure 2 This is a top-view cross-sectional three-dimensional structural diagram of the powertrain of an electric four-wheeled vehicle proposed in this invention;

[0022] Figure 3 The present invention proposes Figure 2 Enlarged view of region A in the middle;

[0023] Figure 4 This is a partial three-dimensional structural diagram of the reciprocating component and the cleaning component in the powertrain of an electric four-wheeled vehicle proposed in this invention;

[0024] Figure 5 This is a partial structural diagram of the cleaning component in the powertrain of an electric four-wheeled vehicle proposed in this invention;

[0025] Figure 6 This is a partial planar structural diagram of the cleaning component in the powertrain of an electric four-wheeled vehicle proposed in this invention;

[0026] Figure 7 This is a schematic diagram of the overall structure of the powertrain of an electric four-wheeled vehicle proposed in this invention.

[0027] In the diagram: 1. Base plate; 2. Drive unit; 3. Drive shaft; 4. Fan blade; 5. Power assembly; 501. First rotating wheel; 502. Second rotating wheel; 503. Rotating rod; 504. Fixed block; 505. Worm gear; 506. Turbine; 507. Connecting shaft; 508. Mounting bracket; 6. Jet head; 7. Hose; 8. Air collection hood; 9. Reciprocating assembly; 901. Third rotating wheel; 902. Fourth rotating wheel; 903. Support plate; 904. Connecting rod; 905. Cam; 906. Extrusion plate; 907. Moving rod; 908. Mounting block; 909. Slide rod; 910. Compression spring; 911. Slide groove; 912. Limiting plate; 10. Cleaning assembly; 1001. Pulling rod; 1002. Air cylinder; 1003. Piston; 1004. Air supply pipe; 1005. Air supply plate; 1006. Air nozzle; 1007. Support block; 11. Protective cover; 12. Heat dissipation vent; 13. Dustproof net; 14. Rear axle bracket; 15. Helical gear; 16. Engaging gear; 17. Rotating shaft; 18. Conduit. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Example 1:

[0031] Reference Figure 1-7An electric four-wheeled vehicle powertrain includes a base plate 1, a drive unit 2 fixed to the top of the base plate 1, a drive shaft 3 fixed to the output end of the drive unit 2, a fan blade 4 disposed on one side of the drive unit 2 above the base plate 1, a power assembly 5 for driving the fan blade 4 to rotate linked to the surface of the drive shaft 3, a jet nozzle 6 disposed on one side of the power assembly 5, a reciprocating assembly 9 for driving the jet nozzle 6 to reciprocate linked to the power assembly 5, a cleaning assembly 10 linked to the reciprocating assembly 9, and a protective cover 11 fixed to the top of the base plate 1, with a heat dissipation vent 12 opened on the surface of the protective cover 11.

[0032] In this invention, during use, power is supplied to the drive unit 2 via a power battery, causing the drive unit 2 to operate. The drive unit 2 drives the drive shaft 3 to rotate, which in turn rotates the wheels mounted on the rear axle of the vehicle body, propelling the vehicle body forward. To fully utilize the power generated by the rotation of the drive shaft 3, a power assembly 5 is installed on the drive shaft 3 to facilitate a linkage effect. The power assembly 5 drives the fan blades 4 mounted on the base plate 1 to rotate at high speed. The rotation of the fan blades 4 disturbs the air inside the base plate 1, generating airflow to cool the surface of the drive unit 2. This prevents the drive unit 2 from generating excessive heat during prolonged operation, which could lead to malfunctions. During operation, the power assembly 5 and the reciprocating assembly 9 work together to achieve the desired effect. The reciprocating assembly 9 operates, driving the jet head 6 to reciprocate on the surface of the drive unit 2, evenly blowing cool air onto the surface of the drive unit 2, thereby effectively improving the heat dissipation effect of the drive unit 2 and extending its service life. During use, since the drive unit 2 is mounted on the base plate 1 and sealed by the protective cover 11, the heat dissipation vents 12 on the protective cover 11 facilitate the airflow between the inside and outside of the base plate 1, dissipating the heat inside the base plate 1. The reciprocating assembly 9 is linked to the cleaning assembly 10, which operates to blow away the dirt or dust splashed onto the heat dissipation vents 12 due to long-term use, thereby achieving a cleaning effect and ensuring that the heat inside the base plate 1 is discharged in a timely manner, guaranteeing the normal operation of the drive unit 2.

[0033] Example 2:

[0034] An electric four-wheeled vehicle's powertrain includes a base plate 1. A drive unit 2 is fixed to the top of the base plate 1, and a drive shaft 3 is fixed to the output end of the drive unit 2. A fan blade 4 is disposed on one side of the drive unit 2 above the base plate 1. A power assembly 5 for driving the fan blade 4 to rotate is linked to the surface of the drive shaft 3. A jet nozzle 6 is disposed on one side of the power assembly 5. A reciprocating assembly 9 for driving the jet nozzle 6 to reciprocate is linked to the power assembly 5. A cleaning assembly 10 is linked to the reciprocating assembly 9. A protective cover 11 is fixed to the top of the base plate 1. A heat dissipation vent 12 is provided on the surface of the protective cover 11. The power assembly 5 includes a fixed... A first rotating wheel 501 is mounted on the surface of the drive shaft 3. A second rotating wheel 502 is driven by a belt on the surface of the first rotating wheel 501. A rotating rod 503 is fixed at the axis of the second rotating wheel 502. A fixing block 504, which is fixedly connected to the base plate 1, is rotatably connected to the surface of the rotating rod 503 via a bearing. A worm gear 505 is fixed at one end of the rotating rod 503. A turbine 506 is meshed on the surface of the worm gear 505. A connecting shaft 507 is fixed at the axis of the turbine 506. The end of the connecting shaft 507 passes through the mounting bracket 508 and is fixedly connected to the fan blade 4. The bottom of the mounting bracket 508 is fixedly connected to the base plate 1.

[0035] In this invention, during use, when the drive shaft 3 rotates, the drive shaft 3, in conjunction with the first rotating wheel 501, the second rotating wheel 502, the rotating rod 503, the fixing block 504, the worm gear 505, the turbine 506, and the connecting shaft 507, drives the fan blades 4 on the base plate 1 to rotate at high speed. This causes the fan blades 4 to disturb the air inside the base plate 1, generating airflow that blows air onto the surface of the drive unit 2, thus dissipating heat and cooling it. The fixing block 504 provides support and limits the rotating rod 503, making the structure more stable. It fully utilizes the kinetic energy generated by the rotation of the drive shaft 3 to dissipate the heat generated by the drive unit 2, extending the service life of the drive unit 2 and preventing malfunctions caused by high temperatures. The fan blades 4 are fixed and limited by the mounting bracket 508, so that the fan blades 4 are located on one side of the drive unit 2, facilitating heat dissipation and cooling of the drive unit 2.

[0036] Example 3:

[0037] A powertrain for an electric four-wheeled vehicle includes a base plate 1. A drive unit 2 is fixed to the top of the base plate 1, and a drive shaft 3 is fixed to the output end of the drive unit 2. A fan blade 4 is arranged on one side of the drive unit 2 above the base plate 1. A power assembly 5 for driving the fan blade 4 to rotate is linked to the surface of the drive shaft 3. A jet nozzle 6 is arranged on one side of the power assembly 5. A reciprocating assembly 9 for driving the jet nozzle 6 to reciprocate is linked to the power assembly 5. A cleaning assembly 10 is linked to the reciprocating assembly 9. A protective cover 11 is fixed to the top of the base plate 1. A heat dissipation vent 12 is opened on the surface of the protective cover 11. A third rotating wheel 901 is fixed to the surface of the connecting shaft 507. A fourth rotating wheel 902 is driven by a belt on the surface of the third rotating wheel 901. One end of the fourth rotating wheel 902 is rotatably connected to a support plate 903 through a bearing. The end of the support plate 903 is connected to the base plate 1. Plate 1 is fixedly connected. A connecting rod 904 is fixed at the axis of the support plate 903. A cam 905 is fixed at the end of the connecting rod 904. A pressing plate 906 is attached to the surface of the cam 905. A moving rod 907 is fixed to one side surface of the pressing plate 906. A mounting block 908 is fixed to the end of the moving rod 907. The jet head 6 is embedded in the mounting block 908. A sliding rod 909 is fixed to the bottom of the mounting block 908. A compression spring 910 is fixed to one side surface of the sliding rod 909. A limiting plate 912 fixed to the end of the compression spring 910 is fixed to the bottom plate 1. The bottom of the sliding rod 909 is slidably connected to the sliding groove 911. The sliding groove 911 is opened on the top surface of the bottom plate 1. An air collecting hood 8 is fixed to one side surface of the mounting bracket 508. A hose 7 is fixed to one end of the air collecting hood 8. The end of the hose 7 is fixedly connected to the jet head 6.

[0038] In this invention, when the power assembly 5 is running, the connecting shaft 507 on the power assembly 5 drives the third rotating wheel 901 to rotate synchronously. The cooperation of the third rotating wheel 901, the fourth rotating wheel 902, the support plate 903, the connecting rod 904, the cam 905, the pressing plate 906, the moving rod 907, the mounting block 908, and the sliding rod 909 causes the jet head 6 mounted on the mounting block 908 to move back and forth in a linear motion. An air collection hood 8 is provided on one side of the mounting frame 508 to collect the airflow generated at the fan blade 4 and deliver it to the jet head 6 through the hose 7. The reciprocating linear motion of the jet head 6 blows air evenly onto the surface of the drive unit 2, removing heat from the surface of the drive unit 2 and thus improving the heat dissipation effect of the drive unit 2. It blows the high temperature heat emitted from the drive unit 2 to the heat dissipation port 12, reducing the risk of the drive unit 2 malfunctioning due to long-term operation. During use, the elastic rebound of the compression spring 910 compresses the slide bar 909, causing the slide bar 909 to slide inside the slide groove 911, which resets the jet head 6. The limiting plate 912 fixes and limits the compression spring 910, making the structure operate more stably and smoothly.

[0039] Example 4:

[0040] An electric four-wheeled vehicle's powertrain includes a base plate 1. A drive unit 2 is fixed to the top of the base plate 1, and a drive shaft 3 is fixed to the output end of the drive unit 2. A fan blade 4 is disposed on one side of the drive unit 2 above the base plate 1. A power assembly 5 for driving the fan blade 4 to rotate is linked to the surface of the drive shaft 3. A jet nozzle 6 is disposed on one side of the power assembly 5. A reciprocating assembly 9 for driving the jet nozzle 6 to reciprocate is linked to the power assembly 5. A cleaning assembly 10 is linked to the reciprocating assembly 9. A protective cover 11 is fixed to the top of the base plate 1. A heat dissipation vent 12 is opened on the surface of the protective cover 11. A pull rod 907 is fixed to the surface of the rod. A lever 1001 is attached to a cylinder 1002 that is slidably connected to its surface. The bottom of the cylinder 1002 is fixedly connected to the base plate 1. A piston 1003 is fixed to one end of the lever 1001 and is slidably connected inside the cylinder 1002. An air supply pipe 1004 is fixed to one side of the cylinder 1002. An air supply plate 1005 is fixed to the end of the air supply pipe 1004. Air nozzles 1006 that are evenly spaced are fixed to the surface of the air supply plate 1005. A support block 1007 that is fixedly connected to the base plate 1 is fixed to the bottom of the air supply plate 1005. A dustproof net 13 is fixed inside the heat dissipation port 12.

[0041] In this invention, during the reciprocating motion of the reciprocating assembly 9, a pulling rod 1001 is fixed to the top of the moving rod 907, causing the pulling rod 1001 to slide inside the air cylinder 1002. The end of the pulling rod 1001 is connected to a piston 1003, causing the piston 1003 to slide inside the air cylinder 1002, thus extruding the gas inside the air cylinder 1002. The gas is then transported through the air pipe 1004 to the inside of the air conveying plate 1005. The air conveying plate 1005 is equipped with multiple air nozzles 1006. The dustproof net 13 is distributed corresponding to the heat dissipation vent 12. The compressed air is discharged through the air nozzle 1006 to blow back the dirt and dust accumulated on the dustproof net 13, thereby achieving the cleaning effect. This allows the air inside the base plate 1 to circulate with the outside, allowing the cold air outside to flow into the base plate 1 to cool down the drive unit 2 working inside the base plate 1. The dustproof net 13 installed inside the heat dissipation vent 12 can prevent foreign objects and dust from entering the base plate 1, providing a good protective effect for the components installed inside the base plate 1.

[0042] Example 5:

[0043] An electric four-wheeled vehicle's powertrain includes a base plate 1. A drive unit 2 is fixed to the top of the base plate 1, and a drive shaft 3 is fixed to the output end of the drive unit 2. A fan blade 4 is disposed on one side of the drive unit 2 above the base plate 1. A power assembly 5 for driving the fan blade 4 to rotate is linked to the surface of the drive shaft 3. A jet nozzle 6 is disposed on one side of the power assembly 5. A reciprocating assembly 9 for driving the jet nozzle 6 to reciprocate is linked to the power assembly 5. A cleaning assembly 10 is linked to the reciprocating assembly 9. A protective cover 11 is fixed to the top of the base plate 1, and the surface of the protective cover 11 has openings... A heat dissipation vent 12 is provided, with a dustproof mesh 13 fixed inside. A wire conduit 18 is fixed to one side surface of the protective cover 11. A rear axle bracket 14 is fixed to one side surface of the base plate 1. The surface of the drive shaft 3 is rotatably connected to the rear axle bracket 14 via a bearing. A helical gear 15 is fixed to the end of the drive shaft 3. A meshing gear 16 meshes with the surface of the helical gear 15. A rotating shaft 17 is fixed at the center of each of the two meshing gears 16. The end of the rotating shaft 17 is rotatably connected to the rear axle bracket 14 via a bearing. A wire conduit 18 is fixed to one side surface of the protective cover 11.

[0044] In this invention, the wires on the electric vehicle body can be connected to the drive unit 2 installed inside the base plate 1 by the wire conduit 18 provided on one side of the protective cover 11. When the drive unit 2 is started, it drives the drive shaft 3 to rotate. The rotation of the drive shaft 3 drives the helical gear 15 to rotate. Through the meshing of the meshing gear 16 and the helical gear 15, the two rotating shafts 17 are driven to rotate synchronously, so that the wheels installed on the rotating shafts 17 rotate, thereby completing the driving of the vehicle. This has better adaptability to the vehicle's climbing driving force and complex road surface, and improves the practicality of the device.

[0045] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A powertrain for an electric four-wheeled vehicle, comprising a base plate (1), characterized in that, A drive unit (2) is fixed to the top of the base plate (1), and a drive shaft (3) is fixed to the output end of the drive unit (2). A fan blade (4) is provided on one side of the drive unit (2) above the base plate (1). A power component (5) for driving the fan blade (4) to rotate is linked to the surface of the drive shaft (3). A jet head (6) is provided on one side of the power component (5). A reciprocating component (9) for driving the jet head (6) to reciprocate is linked to the power component (5). A cleaning component (10) is linked to the reciprocating component (9). A protective cover (11) is fixed to the top of the base plate (1). A heat dissipation vent (12) is opened on the surface of the protective cover (11). The power assembly (5) includes a first rotating wheel (501) fixed on the surface of the drive shaft (3), a second rotating wheel (502) driven by a belt on the surface of the first rotating wheel (501), a rotating rod (503) fixed at the axis of the second rotating wheel (502), a fixing block (504) fixedly connected to the base plate (1) rotatably connected to the surface of the rotating rod (503) by a bearing, a worm gear (505) fixed at one end of the rotating rod (503), a turbine gear (506) meshing on the surface of the worm gear (505), and a connecting shaft (507) fixed at the axis of the turbine gear (506). A third rotating wheel (901) is fixed to the surface of the connecting shaft (507). A fourth rotating wheel (902) is driven by a belt to the surface of the third rotating wheel (901). One end of the fourth rotating wheel (902) is rotatably connected to the support plate (903) through a bearing. The end of the support plate (903) is fixedly connected to the bottom plate (1). A connecting rod (904) is fixed at the axis of the support plate (903). A cam (905) is fixed at the end of the connecting rod (904). A pressing plate (906) is attached to the surface of the cam (905). A moving rod (907) is fixed to one side of the pressing plate (906). A pull rod (1001) is fixed to the surface of the moving rod (907). An air cylinder (1002) is slidably connected to the surface of the pull rod (1001). The bottom of the air cylinder (1002) is fixedly connected to the base plate (1). A piston (1003) is fixed to one end of the pull rod (1001). The piston (1003) is slidably connected inside the air cylinder (1002). An air supply pipe (1004) is fixed to one side surface of the air cylinder (1002). An air supply plate (1005) is fixed to the end of the air supply pipe (1004). An air nozzle (1006) is fixed to the surface of the air supply plate (1005) at equal intervals. A support block (1007) is fixed to the bottom of the air supply plate (1005) and is fixedly connected to the base plate (1).

2. The powertrain for an electric four-wheeled vehicle according to claim 1, characterized in that, The end of the connecting shaft (507) passes through the mounting bracket (508) and is fixedly connected to the fan blade (4). The bottom of the mounting bracket (508) is fixedly connected to the base plate (1).

3. The powertrain for an electric four-wheeled vehicle according to claim 2, characterized in that, The end of the moving rod (907) is fixed with a mounting block (908), the jet head (6) is embedded in the mounting block (908), and the bottom of the mounting block (908) is fixed with a sliding rod (909).

4. The powertrain of an electric four-wheeled vehicle according to claim 3, characterized in that, A compression spring (910) is fixed on one side surface of the slide rod (909), and a limiting plate (912) fixedly connected to the bottom plate (1) is fixed at the end of the compression spring (910). The bottom of the slide rod (909) is slidably connected in the slide groove (911), which is opened on the top surface of the bottom plate (1).

5. The powertrain for an electric four-wheeled vehicle according to claim 3, characterized in that, A gas collection hood (8) is fixed to one side surface of the mounting bracket (508), and a hose (7) is fixed to one end of the gas collection hood (8). The end of the hose (7) is fixedly connected to the jet head (6).

6. The powertrain of an electric four-wheeled vehicle according to claim 1, characterized in that, A dustproof mesh (13) is fixed inside the heat dissipation vent (12), and a wire conduit (18) is fixed on one side surface of the protective cover (11).

7. The powertrain for an electric four-wheeled vehicle according to claim 1, characterized in that, A rear axle bracket (14) is fixed to one side surface of the base plate (1), and the surface of the drive shaft (3) is rotatably connected to the rear axle bracket (14) through a bearing.

8. The powertrain of an electric four-wheeled vehicle according to claim 7, characterized in that, The end of the drive shaft (3) is fixed with a helical gear (15), and the surface of the helical gear (15) is meshed with a meshing gear (16). A rotating shaft (17) is fixed at the center of each of the two meshing gears (16). The end of the rotating shaft (17) is rotatably connected to the rear axle bracket (14) through a bearing.

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