A gear-reduction motor for an electrically powered wheel

Abstract

This invention relates to the field of geared motor technology and discloses a geared motor for electric vehicle wheels, comprising: a wheel and a rotating shaft rotatably disposed at the center of the wheel; a hub disposed on the inner side of the wheel; a frame disposed on the inner side of the hub; protective shells symmetrically disposed on both sides of the hub; mounting seats fixedly installed inside the protective shells; a disc brake pad disposed at one end of the rotating shaft; a rotor guide bar disposed inside the frame; a chuck fixedly installed on one side of the rotor guide bar; and a sealing cover fixedly installed on the other side of the rotor guide bar. This invention uses the rotation of the support bar to drive the rotating ring to rotate together, causing the fan blades to rotate accordingly. After rotation, the airflow blows inward, gradually cooling the passing lubricating oil, reducing the heat in the inner layer, and lowering the temperature of the lubricating oil. This causes the lubricating oil passing outside the motor rotor assembly to change from hot to cool, thus providing maintenance and lubrication while reducing heat generation in the motor, facilitating a longer service life.

Description

Technical Field

[0001] This invention relates to the field of geared motor technology, and more specifically to a geared motor for electric vehicle wheels. Background Technology

[0002] Gear reducer motors typically integrate a motor and a gear reduction mechanism. This is mainly to convert the high-speed, low-torque output of the motor into the low-speed, high-torque output required by the wheels, thus meeting the low-speed, high-torque demands of electric vehicles for starting, climbing, and heavy-duty driving. Because ordinary motors usually output high-speed, low-torque power, gear reducer motors can prevent overheating by avoiding prolonged high-load driving during the process of driving the wheels of an electric vehicle. However, traditional gear reducer motors still have the following common problems in actual operation.

[0003] For example, in actual operation, the motor generates a lot of heat during long-term operation, and sometimes it needs to run under high load for a long time, which will accelerate the wear and tear of the motor, as well as the lack of oil and aging of the motor rotor bearing or gear shaft bearing. Although it can be assisted by adding lubricating oil regularly, it is difficult to assist in heat dissipation of the motor while lubricating, which greatly affects the service life of the motor. Summary of the Invention

[0004] This invention provides a gear reduction motor for electric vehicle wheels. It uses lubricating oil to lubricate the gear set, and then uses suction to draw the lubricating oil away from the outside of the motor set. Combined with air cooling, the lubricating oil is cooled to complete the cooling of the motor. The movement path during the oil extraction is used to lubricate the bearing part of the motor set, thereby improving transmission efficiency and reducing the temperature of the motor.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] In a first aspect, a gear reduction motor for an electric vehicle wheel includes: the wheel and a rotating shaft rotatably disposed at the center of the wheel; a hub is disposed on the inner side of the wheel; a frame is disposed on the inner side of the hub; protective shells are symmetrically disposed on both sides of the hub; a mounting seat is fixedly installed inside the protective shell; a disc brake pad is disposed at one end of the rotating shaft; a rotor guide bar is disposed inside the frame; a chuck is fixedly installed on one side of the rotor guide bar; a sealing cover one is fixedly installed on the other side of the rotor guide bar; a motor rotor assembly is disposed inside the rotor guide bar; and a sealing cover two is disposed outside the sealing cover one; further comprising:

[0007] The lubrication part is located inside the mounting base and between the first sealing cover and the second sealing cover to lubricate the gears and prevent wear.

[0008] The lubrication part includes a gear component and a maintenance component. The gear component is disposed inside the mounting base. The gear component and the maintenance component are connected. The maintenance component is disposed between sealing cover one and sealing cover two.

[0009] The heat dissipation unit is located on the outside of the shaft and the inside of the sleeve for active heat dissipation;

[0010] The heat dissipation part includes an air-cooling component and a flow guide component. The air-cooling component is disposed on the outside of the rotating shaft. The air-cooling component is connected to the flow guide component, and the flow guide component is disposed inside the sleeve frame.

[0011] The buffer section is located inside the mounting base and outside the rotating shaft to assist in the output of lubricating oil.

[0012] Furthermore, the gear component includes:

[0013] The ring gear is rotatably mounted on the inner wall of the second sealing cover;

[0014] The sun gear is located at the center of the second sealing cover and on the outside of the shaft;

[0015] Planetary gear one, planetary gear two, and planetary gear three are all located between the ring gear and the sun gear, and can mesh with the inner side of the ring gear and the outer side of the sun gear.

[0016] The planet carrier is fitted onto the center of planetary gear one, planetary gear two, and planetary gear three.

[0017] Furthermore, the maintenance component includes:

[0018] The pipe runs through the space between sealing cover two and sealing cover one.

[0019] The conduit is fixedly installed at the top of the pipe;

[0020] The oil cap is located at one end of the conduit;

[0021] The storage tank is fixedly installed at the bottom of the pipeline and matches the inner wall of the sealing cover.

[0022] Furthermore, the maintenance component also includes:

[0023] Multiple rubber bladders are fixedly installed inside the storage tank.

[0024] The nozzle is located on the outside of the rubber bladder;

[0025] Multiple annular cone plates are fixedly installed above planetary gear one, planetary gear two, and planetary gear three.

[0026] The annular groove is formed inside the annular cone plate.

[0027] Furthermore, the maintenance component also includes:

[0028] Through holes, in multiple sets, two in each set, symmetrically opened on the annular conical plate;

[0029] The support rod is installed on the inner wall of the planetary gear and is higher than the annular cone plate;

[0030] The connector strip is fixedly installed at the top of the support rod.

[0031] Furthermore, the air-cooled component includes:

[0032] Multiple support bars are provided on the outside of the pivot.

[0033] A rotating ring is located at one end of the support bar;

[0034] The fan blades are multiple and are fixedly installed on the outside of the rotating ring.

[0035] Furthermore, the flow guide includes:

[0036] The inner layer is located on the inside of the frame.

[0037] There are multiple flow guides, all of which are fixedly installed on the outer side of the inner layer;

[0038] The oil inlet plate is fixedly installed on one side of the inner layer;

[0039] Protective components are installed on the inner wall of the protective shell to prevent stones or impurity particles from entering from the outside.

[0040] Furthermore, the protective component includes:

[0041] Protective plate one is installed inside the protective shell on one side;

[0042] The second protective plate is installed inside the protective shell on the other side;

[0043] The sealing plug is installed through the bottom of the mounting base.

[0044] Furthermore, the buffer section includes:

[0045] The baffle plate is located on one side of the mounting base and at the center of the mounting base.

[0046] A spring is located on one side of the baffle plate.

[0047] The sleeve has a groove inside that matches the guide tube.

[0048] Furthermore, the buffer section also includes:

[0049] The buffer plate is fixedly installed at one end of the spring;

[0050] The impeller seat is located on the outside of the spring;

[0051] Multiple impeller blades are fixedly mounted above the buffer plate.

[0052] The above-described solution of the present invention has at least the following beneficial effects:

[0053] The rotation of the support bar drives the rotating ring to rotate together, and the fan blades rotate accordingly. After rotation, the wind blows towards the inner layer, gradually cooling the lubricating oil as it passes through. The heat in the inner layer decreases, and the temperature of the lubricating oil is lowered, so that the lubricating oil passing through the outside of the motor rotor assembly changes from hot to cool. This not only provides maintenance and oil replenishment but also reduces heat generation in the motor in a timely manner, thus extending its service life. Attached Figure Description

[0054] The invention will now be further described with reference to the accompanying drawings.

[0055] Figure 1 This is a schematic diagram of the overall appearance provided for an embodiment of the present invention;

[0056] Figure 2 A three-dimensional structural diagram of the hub, mounting base, disc brake pads and wheel assembly provided in an embodiment of the present invention;

[0057] Figure 3 An exploded perspective view of the protective shell, mounting base, and sleeve assembly provided in an embodiment of the present invention;

[0058] Figure 4 This is an internal schematic diagram of the combination of protective plate 2, protective plate 1, sleeve frame, and mounting base provided in an embodiment of the present invention;

[0059] Figure 5 This is a schematic diagram of the internal cross-sectional structure of the frame provided in an embodiment of the present invention;

[0060] Figure 6 This is a schematic diagram of the combined structure of the sealing cover, motor rotor assembly, and sealing plug provided in an embodiment of the present invention;

[0061] Figure 7 This is an exploded three-dimensional structural diagram of the combination of ring gear, planetary gear one, planetary gear two, planetary gear three, and sun gear provided in an embodiment of the present invention.

[0062] Figure 8 This is a schematic diagram of the combined structure of the storage tank, pipeline, and rubber bladder provided in an embodiment of the present invention;

[0063] Figure 9 This is a schematic diagram illustrating the cross-sectional structure of the storage tank, nozzle, and planetary gear assembly provided in an embodiment of the present invention.

[0064] Figure 10 This is provided by the embodiments of the present invention. Figure 9 Enlarged schematic diagram of the local structure at point C;

[0065] Figure 11 This is a three-dimensional exploded view of the combined structure of the support bar, rotating ring, and rotating shaft provided in an embodiment of the present invention;

[0066] Figure 12 This is a schematic diagram illustrating the cross-sectional structure of the combined frame, inner layer, and guide tube provided in an embodiment of the present invention.

[0067] Figure 13 This is a schematic diagram illustrating the cross-sectional structure of the sleeve frame and oil inlet plate assembly provided in an embodiment of the present invention.

[0068] Figure 14 This is provided by the embodiments of the present invention. Figure 13 Enlarged schematic diagram of a portion of the structure at point A;

[0069] Figure 15 This is a schematic diagram of the impeller seat and impeller blade structure combination provided in an embodiment of the present invention;

[0070] Figure 16 This is an internal schematic diagram of a planetary carrier, mounting base, ring gear, and planetary gear assembly provided in an embodiment of the present invention.

[0071] In the diagram: 1. Wheel; 2. Axle; 3. Protective shell; 4. Mounting base; 5. Hub; 6. Disc brake pad; 7. Sleeve; 8. Rotor guide bar; 9. Chuck; 10. Sealing cover one; 11. Motor rotor assembly; 12. Sealing cover two; 13. Ring gear; 14. Planetary gear one; 15. Planetary gear two; 16. Planetary gear three; 17. Sun gear; 18. Oil cap; 19. Conduit; 20. Pipeline; 21. Storage tank; 22. 23. Rubber bladder; 24. Nozzle; 25. Support rod; 26. Connector strip; 27. Annular cone plate; 28. Annular groove; 29. ​​Through hole; 20. Support bar; 31. Rotating ring; 32. Fan blade; 33. Protective plate one; 34. Protective plate two; 35. Sealing plug; 36. Inner layer; 37. Guide pipe; 38. Oil inlet plate; 39. Baffle plate; 40. Spring; 41. Buffer plate; 42. Impeller seat; 43. Impeller blade; 44. Planetary carrier. Detailed Implementation

[0072] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0073] like Figures 1 to 16As shown, a gear reduction motor for an electric vehicle wheel includes: a wheel 1 and a rotating shaft 2 rotatably disposed at the center of the wheel 1; a hub 5 is disposed on the inner side of the wheel 1; a frame 7 is disposed on the inner side of the hub 5; protective shells 3 are symmetrically disposed on both sides of the hub 5; a mounting seat 4 is fixedly installed inside the protective shell 3; a disc brake pad 6 is disposed at one end of the rotating shaft 2; a rotor guide bar 8 is disposed inside the frame 7; a chuck 9 is fixedly installed on one side of the rotor guide bar 8; a sealing cover 10 is fixedly installed on the other side of the rotor guide bar 8; a motor rotor assembly 11 is disposed inside the rotor guide bar 8; a sealing cover 12 is disposed outside the sealing cover 10; and further includes:

[0074] The lubrication part is located inside the mounting base 4 and between the sealing cover 10 and the sealing cover 12 to lubricate the gears and prevent wear.

[0075] The lubrication part includes a gear component and a maintenance component. The gear component is located inside the mounting base 4. The gear component and the maintenance component are connected. The maintenance component is located between the sealing cover 10 and the sealing cover 2 12.

[0076] The heat dissipation unit is located on the outside of the rotating shaft 2 and the inside of the sleeve 7 to actively dissipate heat from the motor and air cool the lubricating oil;

[0077] The heat dissipation unit includes an air-cooling component and a flow guide component. The air-cooling component is located on the outside of the rotating shaft 2 and is connected to the flow guide component. The flow guide component is located inside the sleeve 7.

[0078] The buffer section is located inside the mounting base 4 and outside the rotating shaft 2 to assist in the output of lubricating oil.

[0079] Specifically, the number of mounting bases 4 and protective shells 3 are equal, and they are located outside the rotating shaft 2; the two protective shells 3 fix the hub 5 to ensure the stability of the hub 5; the sealing cover 10 and the chuck 9 cooperate to fix the rotor guide bar 8; the sealing cover 10 and the sealing cover 2 12 are attached together and fixed by bolts to form a closed environment; one end of the rotating shaft 2 is connected to the motor rotor assembly 11 and to the drive end of the motor rotor assembly 11.

[0080] In practical application, the operator first stands on one side of wheel 1 and adds lubricating oil to the mounting seat 4 on one side. Driven by the motor, the shaft 2 rotates. When the gear meshes and rotates to the hydraulic oil storage position, it collides with the gear, squeezing out the lubricating oil. The squeezed-out lubricating oil is sprayed onto the outside of the meshing gears, lubricating the next meshing position to prevent wear due to prolonged meshing or lack of oil, thus improving transmission efficiency. As more lubricating oil is sprayed, the lubricating oil in one mounting seat 4 rises above the center of the sleeve 7, reaching a range where it can be sucked in. The rotation of the shaft 2 then drives the other side... The rotation of the impeller seat 41 and impeller blades 42 generates suction force, drawing lubricating oil into the mounting seat 4 on the other side. The lubricating oil flows over the outside of the motor rotor assembly 11, lubricating the bearings at both ends of the motor rotor assembly 11. Finally, the lubricating oil is discharged after the maintenance cycle is completed. At the same time, when one end of the mounting seat 4 on the other side rotates, it generates airflow through the air-cooling component. The airflow comes into contact with the lubricating oil that has passed over the outside of the motor rotor assembly 11, creating an air-cooling effect. This airflow also dissipates heat from the motor rotor assembly 11 that is surrounded on the inside, ultimately reducing heat generation and achieving active heat dissipation, thus creating a heat dissipation effect.

[0081] like Figure 7 , Figure 9 , Figure 16 As shown, the gear component includes:

[0082] The ring gear 13 is rotatably mounted on the inner wall of the sealing cover 12;

[0083] The sun gear 17 is located at the center of the sealing cover 2 12 and on the outside of the rotating shaft 2;

[0084] Planetary gear 14, planetary gear 2 15, and planetary gear 3 16 are all located between ring gear 13 and sun gear 17, and can mesh with the inner side of ring gear 13 and the outer side of sun gear 17.

[0085] Planet carrier 43 is fitted into the center of planetary gear 14, planetary gear 2 15, and planetary gear 3 16;

[0086] Specifically, the ring gear 13 is rotatably connected to the inner side of the sealing cover 12, and the inner wall is provided with tooth grooves that mesh with the planetary gear 14, planetary gear 25, and planetary gear 36; the rotating shaft 2 passes through the sun gear 17; the center of the planetary gear 14, planetary gear 25, and planetary gear 316 all pass through the planet carrier 43 and are fixed together by the planet carrier 43.

[0087] In practical applications, the electric vehicle's speed varies, sometimes high, sometimes low, and sometimes it needs to reverse, requiring constant adjustments to adapt to road conditions. The gear ratios of all forward gears are changed through the alteration of planetary gears 14, 15, and 16. In forward gear:

[0088] 1. When the sun gear 17 and planetary gear 14, planetary gear 25, and planetary gear 316 rotate, the speed at the edges is the same. At this time, the speed at the meshing point of planetary gear 14, planetary gear 25, and planetary gear 316 is the same as that of the sun gear 17.

[0089] If the ring gear 13 is stationary, and the shaft 2 is energized and rotates, it drives the sun gear 17 to rotate. The meshing point between the sun gear 17 and planetary gear 15 will have a certain rotational speed. However, the meshing point between planetary gear 16 and the ring gear 13 cannot rotate in a circular motion; it can only maintain a relatively stationary state. In forward gear, it should maintain a state of both rotation and rotation around the ring gear 13. That is, the sun gear 17 revolves, and planetary gear 16 rotates and rotates around the ring gear 13. At this time, planetary gear 16 only rotates, while planetary gear 16 and the ring gear... The meshing point 13 produces velocities in opposite directions. The velocities of the meshing point of planetary gear 15 and sun gear 17 are the same as those of sun gear 17, which are velocities in the same direction. Therefore, the relative velocities of planetary gear 16 and ring gear 13 are 0. Planetary gear 16 is passively rotated to compensate for the speed difference. Planet carrier 43 is fixed above planetary gear 14, planetary gear 25, and planetary gear 36. Planet carrier 43 will rotate together with planetary gear 14, planetary gear 25, and planetary gear 36, achieving the purpose of both rotation and circular rotation.

[0090] If the ring gear 13 rotates and the sun gear 17 remains stationary, that is, the relative speed between the meshing point of planetary gear 15 and the sun gear 17 is 0, planetary gear 16 must rotate to achieve this speed balance. Because the radius of the entire rotation is larger, the planetary gear will rotate at a higher speed, so the planet carrier 43 rotates at a higher speed.

[0091] 2. When it is necessary to move wheel 1 backward or engage reverse gear:

[0092] When the brake is engaged, there is no output rotation from planetary gear 14, planetary gear 25, or planetary gear 316. That is, the sun gear 17 rotates while the planet carrier 43 remains stationary. This means that planetary gear 14, planetary gear 25, and planetary gear 316 cannot rotate in a circular motion; they can only rotate. This rotation is exactly the opposite of the rotation of ring gear 13. Since ring gear 13 rotates in the opposite direction, the opposite rotation of ring gear 13 and sun gear 17 results in reverse gear.

[0093] like Figures 8 to 10 As shown, the maintenance parts include:

[0094] Pipe 20 is installed between sealing cap 2 12 and sealing cap 1 10;

[0095] Conduit 19 is fixedly installed at the top of pipe 20;

[0096] Oil cap 18 is located at one end of conduit 19;

[0097] Storage tank 21 is fixedly installed at the bottom end of pipe 20 and matches the inner wall of sealing cover 212;

[0098] Multiple rubber bladders 22 are fixedly installed inside the storage tank 21;

[0099] Nozzle 23 is located on the outside of rubber bladder 22;

[0100] Multiple annular cone plates 26 are fixedly installed above planetary gear 14, planetary gear 25, and planetary gear 316;

[0101] An annular groove 27 is formed inside the annular cone plate 26.

[0102] Through holes 28 are in multiple sets, two in each set, symmetrically opened on the annular cone plate 26;

[0103] Support rod 24 is set on the inner wall of planetary gear 14 and is higher than annular cone plate 26;

[0104] The connector 25 is fixedly installed at the top of the support rod 24.

[0105] Specifically, a gap is reserved between sealing cap 10 and sealing cap 22 so that pipe 20 can pass through the inside of sealing cap 22, facilitating the injection of external oil into the easily worn gear set; storage tank 21 is used to temporarily store oil so that it can be squeezed and sprayed later, and at the same time, it can form a seal on the inner wall of sealing cap 22 to prevent oil from flowing out from the side in large quantities, facilitating the drainage of lubricating oil; planetary gear 14, planetary gear 25, and planetary gear 316 are provided with retaining springs on their inner sides, and the upper part of the retaining springs is fixed to the support rod 24. A fixed connection is used to support the support rod 24; the storage tank 21 is located inside the sealing cover 2 12; a certain height is reserved between the annular cone plate 26 and the planetary gear 1 14, planetary gear 2 15, and planetary gear 3 16, and the insertion strip 25 and the annular cone plate 26 are both lower than the reserved height between the planetary carrier 43 and the planetary gear 1 14, planetary gear 2 15, and planetary gear 3 16 so that the gears can rotate normally without being obstructed; the rubber bladder 22 is located outside the planetary carrier 43; the nozzle 23 is aligned with the inside of the annular cone plate 26.

[0106] In practical application, the special electric vehicle lubricating oil for maintenance is first added through the oil cap 18. The lubricating oil enters the conduit 19 and is guided into the storage tank 21 through the pipe 20, where it is temporarily stored. When the electric vehicle moves forward, it drives planetary gear 14, planetary gear 25, and planetary gear 316 to rotate and move in a circular motion. The rotation of planetary gear 14 drives the support rod 24 and the connector 25 to move. The connector 25 collides with the rubber bladder 22, and the lubricating oil inside the rubber bladder 22 is sprayed out through the nozzle 23 and enters the annular cone plate 26. It drips onto the planetary gear 14, planetary gear 25, and planetary gear 316 through the through holes 28 on both sides, which helps to maintain the meshing position, prevents wear or lack of oil inside the gears due to long-term meshing, and extends service life.

[0107] like Figures 1 to 6 , Figures 11 to 16 As shown, the air-cooled component includes:

[0108] Support bars 29, having multiple types, are arranged on the outer side of the rotating shaft 2;

[0109] Rotating ring 30 is located at one end of support bar 29;

[0110] Multiple fan blades 31 are fixedly installed on the outside of the rotating ring 30.

[0111] The flow guide includes:

[0112] Inner layer 35, located inside the frame 7;

[0113] Multiple guide tubes 36 are fixedly installed on the outer side of the inner layer 35;

[0114] The oil inlet plate 37 is fixedly installed on one side of the inner layer 35;

[0115] Protective components are installed on the inner wall of the protective shell 3 to prevent stones or impurity particles from entering from the outside.

[0116] Specifically, the support bar 29 is used to support the rotating ring 30; there is a certain distance between the length of the fan blade 31 and the protective shell 3, so there will be no interference when rotating; the inner layer 35 is hollow; the guide tube 36 is located between the sleeve frame 7 and the inner layer 35; the inner layer 35 accommodates the guide tube 36; one end of the guide tube 36 protrudes from the inner layer 35 to facilitate the entry of lubricating oil; the oil inlet plate 37 has the same number of slots as the guide tube 36 so that the lubricating oil can enter the interior of the guide tube 36 in an orderly manner according to the guidance of the slots, and accelerate the cooling time through the tortuous path of the guide tube 36;

[0117] In this embodiment, although planetary gear 14, planetary gear 25, and planetary gear 36 can be lubricated and maintained to reduce wear, the outer sides of the rotating shafts 2 on both sides of the motor rotor assembly 11 are still not lubricated. Due to frequent movement, they still need to be maintained. After the lubricating oil lubricates planetary gear 14, planetary gear 25, and planetary gear 36, the lubricating oil accumulates in the mounting base 4 as the amount of oil sprayed increases. The lubricating oil passes through the outer sides of the rotating shafts 2 on both sides of the motor rotor assembly 11, completing the lubrication of one side. At the same time, when the rotating shaft 2 rotates, the rotating shaft 2 drives the impeller 42 to rotate. The rotation of the impeller 42 generates a suction force, which draws the lubricating oil into the sealed guide pipe 36, drawing the lubricating oil through the slot of the oil inlet plate 37 into the guide pipe 36. Before the lubricating oil moves to the other side of the mounting base 4, the lubricating oil will move to the outer side of the rotating shaft 2 on the other side of the motor rotor assembly 11 according to the suction force, thereby lubricating the bearings on both sides of the rotating shaft 2 to improve rotation efficiency and prevent wear and oil shortage.

[0118] Meanwhile, since the motor generates a lot of heat during operation, it needs to be cooled. The lubricating oil used to maintain planetary gears 14, 15, and 16 generates heat due to the friction of the rotating gears, causing the lubricating oil on the other side of the motor rotor assembly 11 to also heat up. This makes it difficult to handle the heat in the motor rotor assembly 11. Therefore, the support bar 29 rotates, causing the rotating ring 30 to rotate as well, and the fan blades 31 rotate accordingly. After rotation, the air blows towards the inner layer 35, gradually cooling the lubricating oil that passes through it. The heat in the inner layer 35 decreases, and the temperature of the lubricating oil is lowered, so that the lubricating oil passing through the outer side of the motor rotor assembly 11 changes from hot to cool. This not only provides maintenance and oil replenishment but also reduces the heat generated by the motor in a timely manner, which helps to extend its service life.

[0119] like Figure 12 As shown, the protective components include:

[0120] Protective plate 32 is installed inside the protective shell 3 on one side;

[0121] Protective plate 2 33 is installed inside the protective shell 3 on the other side;

[0122] The sealing plug 34 is installed through the bottom of the mounting base 4.

[0123] Specifically, the second protective plate 33 is installed on the outside of the mounting base 4, but does not completely cover the mounting base 4. Both the mounting base 4 and the second protective plate 33 are located below the protective shell 3. The sealing plug 34 penetrates the mounting base 4 and seals the opening of the mounting base 4 to ensure that oil can be drained immediately after use or after the maintenance time. The first protective plate 32 and the second protective plate 33 are respectively installed on the outside of the sleeve frame 7 to prevent external sand or other particles from entering the gaps of the sleeve frame 7 and ensure the sealing safety of the sleeve frame 7.

[0124] like Figures 14 to 15 As shown, the buffer section includes:

[0125] The baffle plate 38 is located on one side of the mounting base 4 and at the center of the mounting base 4;

[0126] Spring 39 is located on one side of the baffle plate 38.

[0127] The sleeve 7 has a groove inside that matches the guide tube 36.

[0128] The buffer plate 40 is fixedly installed at one end of the spring 39;

[0129] Impeller seat 41 is located on the outside of spring 39;

[0130] Multiple impeller blades 42 are fixedly mounted above the buffer plate 40.

[0131] Specifically, the baffle plate 38 is used to support the spring 39; the blades of the impeller 42 are backward-curved blades, used to guide the lubricating oil out along a curved path;

[0132] In actual use, the lubricating oil enters the interior of the other side of the mounting base 4 through the guide pipe 36 and enters the small hole at one end of the impeller blade 42. Upon arrival, it is thrown out by its centrifugal rotation. This thrown lubricating oil has kinetic energy and pressure. After the lubricating oil is accelerated and pressurized, it has strong pressure, which can easily cause strong vibrations when the oil is discharged, resulting in water hammer. When the lubricating oil passes through the buffer plate 40, the buffer plate 40 is impacted and moves. The spring 39 retracts at the baffle plate 38, which can effectively reduce the vibration when the lubricating oil is sprayed out. After a certain amount of lubricating oil is drawn into the interior of the mounting base 4 on the other side, when the maintenance cycle is reached, the sealing plug 34 is removed. There will be no large abnormal noise and vibration when it is sprayed out, which improves the driving experience and facilitates the next maintenance.

[0133] Working principle:

[0134] During operation, the maintenance components achieve automatic lubrication of the gear meshing parts through precise structural design. The operator first injects special electric vehicle lubricating oil into the oil cap 18 at the top of the conduit 19. The lubricating oil flows along the conduit 19 into the pipe 20 that passes through the sealing cap 10 and the sealing cap 12, and is finally stored in multiple rubber bladders 22 inside the storage tank 21. The storage tank 21 matches the inner wall of the sealing cap 12 to ensure stable lubricating oil storage.

[0135] When the electric vehicle is in motion, planetary gear 14, planetary gear 25, and planetary gear 316 rotate and move in a circular motion simultaneously under the meshing action of sun gear 17 and ring gear 13. The support rod 24 on the inner wall of the planetary gear rotates synchronously with the gear. The insertion strip 25 at the top of the support rod 24 is higher than the annular cone plate 26. During the rotation, it periodically collides with the rubber bladder 22. After being collided, the rubber bladder 22 deforms, and the internal lubricating oil is sprayed out through the nozzle 23 on the outside and precisely injected into the interior of the annular cone plate 26.

[0136] A certain height is reserved between the annular cone plate 26 and the planetary gears. Both the insert strip 25 and the annular cone plate 26 are lower than the gap between the planet carrier and the planetary gears, ensuring that the gear rotation is not obstructed. After the lubricating oil enters the annular cone plate 26, it drips evenly into the meshing area of ​​the planetary gears, sun gear 17, and ring gear 13 through multiple sets of symmetrical through holes 28, forming continuous lubrication. This process achieves the on-demand release of lubricating oil through mechanical linkage, effectively preventing wear and oil shortage problems caused by long-term meshing of gears, and significantly improving the service life of the gear set.

[0137] When the rotating shaft 2 rotates, it synchronously drives the air-cooling components and the air-guiding components to operate, achieving the dual functions of heat dissipation and lubrication. In the air-cooling components, the rotating shaft 2 drives the rotating ring 30 to rotate through multiple support bars 29, and the fan blades 31 on the outer side of the rotating ring 30 rotate at high speed accordingly. The length of the fan blades 31 maintains a safe distance from the protective shell 3 to avoid rotational interference, and the generated air force is directed towards the inner layer 35 structure inside the sleeve frame 7. In the air-guiding components, the inner layer 35 is a hollow structure, and multiple air-guiding pipes 36 fixedly installed on the outer side are located between the sleeve frame 7 and the inner layer 35, with one end protruding from the inner layer 35 to facilitate oil inlet. The oil inlet plate 37 has slots matching the number of air-guiding pipes 36 to guide the lubricating oil to flow in in an orderly manner. When the lubricating oil accumulated in the mounting base 4 after gear lubrication, some of the lubricating oil naturally flows through the outer side of the rotating shaft 2 on both sides of the motor rotor assembly 11, completing the initial lubrication.

[0138] Simultaneously, the rotating shaft 2 drives the impeller blades 42 to rotate, generating suction force to draw the lubricating oil in the mounting base 4 into the guide pipe 36 through the slot of the oil inlet plate 37. The tortuous path of the guide pipe 36 prolongs the flow time of the lubricating oil, and the wind force generated by the fan blades 31 continuously blows through the guide pipe 36, forcibly cooling the lubricating oil inside. The cooled lubricating oil flows along the guide pipe 36, and before reaching the other side of the mounting base 4, it is drawn by suction force and flows through the outside of the rotating shaft 2 on the other side of the motor rotor assembly 11, achieving full lubrication of the bearings on both sides of the rotating shaft 2. At the same time, the low-temperature lubricating oil absorbs the heat of motor operation, reducing the temperature of the motor rotor assembly 11. Through the heat dissipation and lubrication synergy mechanism, the service life of the equipment is extended.

[0139] The heat dissipation function is achieved through the cooperation of air-cooling components and air-guiding components. When the rotating shaft 2 rotates, the support bar 29 drives the rotating ring 30 and fan blades 31 to rotate, and the air force generated by the fan blades 31 blows inward. At the same time, the rotation of the rotating shaft 2 drives the impeller blades 42 to rotate, generating suction force, which draws the lubricating oil in the mounting base 4 into the guide pipe 36 through the slot of the oil inlet plate 37. The lubricating oil flows in the tortuous path of the guide pipe 36, and the air force generated by the fan blades 31 cools the lubricating oil in the guide pipe 36, reducing the temperature of the lubricating oil.

[0140] The cooled lubricating oil flows through the outside of the motor rotor assembly 11, which not only lubricates the bearings at both ends of the motor rotor assembly 11, but also absorbs the heat generated by the motor operation. The heat is carried away by the air-cooled lubricating oil, thus achieving active heat dissipation of the motor, reducing the heat generated by the motor and extending its service life.

[0141] When the lubricating oil needs to be safely maintained during operation, the protective components on the inner wall of the protective shell 3 form multiple protective barriers. Protective plate one 32 and protective plate two 33 are respectively installed on the outer side of the sleeve frame 7. Protective plate two 33 is located on the outer side of the mounting base 4 but does not completely cover it, thus preventing external sand, particles, and other impurities from entering the gaps in the sleeve frame 7 without affecting the normal operation of the device. The sealing plug 34 at the bottom of the mounting base 4 passes through the opening, forming a seal during non-maintenance periods to prevent lubricating oil leakage and ensure the stability of the internal closed environment.

[0142] The buffer section uses an elastic structure to dissipate pressure shocks during the flow of lubricating oil. The lubricating oil, cooled by the guide pipe 36, enters the other side of the mounting base 4 and enters the impeller seat 41 through a small hole at one end of the impeller blade 42. The impeller blade 42 adopts a backward-curved blade design, which centrifugally throws the lubricating oil along a curved path, generating strong kinetic energy during the acceleration and pressurization process.

[0143] When the high-pressure lubricating oil flows through the buffer plate 40, it impacts the buffer plate 40, causing it to move towards the return plate 38 and compressing the spring 39 on one side of the return plate 38. The elastic deformation of the spring 39 absorbs the impact force of the lubricating oil, effectively preventing strong vibrations caused by water hammer. When the maintenance cycle is reached, the sealing plug 34 is removed to drain the lubricating oil. The buffered lubricating oil can be discharged smoothly without obvious abnormal noise or vibration, which not only improves the driving experience but also creates convenient conditions for the next maintenance.

[0144] In summary, the various components form a closed-loop system through mechanical linkage: maintenance parts achieve precise lubrication, air cooling and air guide parts simultaneously complete heat dissipation and comprehensive lubrication, protective parts ensure the operating environment, and buffer parts regulate pressure fluctuations, all working together to ensure the efficient, stable, and long-life operation of the gear reducer motor.

[0145] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gear-reduced electric motor for an electrically motorized wheel, comprising: The wheel (1) and the axle (2) rotatably mounted at the center of the wheel (1) are provided. A hub (5) is provided on the inner side of the wheel (1). A frame (7) is provided on the inner side of the hub (5). Protective shells (3) are symmetrically arranged on both sides of the hub (5). A mounting seat (4) is fixedly installed on the inner side of the protective shell (3). A disc brake pad (6) is provided at one end of the axle (2). A rotor guide bar (8) is provided inside the frame (7). A chuck (9) is fixedly installed on one side of the rotor guide bar (8). A sealing cover (10) is fixedly installed on the other side of the rotor guide bar (8). A motor rotor assembly (11) is provided inside the rotor guide bar (8). A sealing cover (12) is provided on the outer side of the sealing cover (10). The feature is that it further includes: The lubrication part is located inside the mounting base (4) and between the first sealing cover (10) and the second sealing cover (12) to lubricate the gears and prevent wear. The lubrication part includes a gear component and a maintenance component. The gear component is disposed inside the mounting base (4). The gear component and the maintenance component are connected. The maintenance component is disposed between the first sealing cover (10) and the second sealing cover (12). The heat dissipation unit is located on the outside of the rotating shaft (2) and the inside of the sleeve (7) for active heat dissipation; The heat dissipation part includes a cooling component and a flow guide. The cooling component is located on the outside of the rotating shaft (2). The cooling component is connected to the flow guide. The flow guide is located inside the sleeve (7). The buffer section is located inside the mounting base (4) and outside the rotating shaft (2) to assist in the output of lubricating oil; The gear component includes: The ring gear (13) is rotatably mounted on the inner wall of the sealing cover (12); The sun gear (17) is located at the center of the sealing cover (12) and on the outside of the shaft (2); Planetary gear one (14), planetary gear two (15), and planetary gear three (16) are all located between the ring gear (13) and the sun gear (17), and can mesh with the inner side of the ring gear (13) and the outer side of the sun gear (17); Planet carrier (43) is fitted into the center of planetary gear one (14), planetary gear two (15), and planetary gear three (16); The maintenance parts include: Pipe (20) is installed between sealing cap two (12) and sealing cap one (10); The conduit (19) is fixedly installed on top of the pipe (20); An oil cap (18) is located at one end of a conduit (19); Storage tank (21) is fixedly installed at the bottom end of pipe (20) and matches the inner wall of sealing cover two (12); Multiple rubber bladders (22) are fixedly installed inside the storage tank (21); The nozzle (23) is located on the outside of the rubber bladder (22); An annular cone plate (26) has multiple components and is fixedly installed above planetary gear one (14), planetary gear two (15), and planetary gear three (16); An annular groove (27) is formed inside the annular cone plate (26); Through holes (28) are in multiple groups, two in each group, symmetrically opened on the annular cone plate (26). The support rod (24) is set on the inner wall of the planetary gear (14) and is higher than the annular cone plate (26). The connector strip (25) is fixedly installed at the top of the support rod (24).

2. A gear-reduced electric motor for an electrically motorized wheel according to claim 1, characterized in that: The air-cooled component includes: Multiple support bars (29) are provided on the outside of the pivot (2); A rotating ring (30) is set at one end of the support bar (29); The fan blades (31) are multiple and are fixedly installed on the outside of the rotating ring (30).

3. A gear-reduced electric motor for an electrically motorized wheel according to claim 1, characterized in that: The flow guide includes: The inner layer (35) is located inside the frame (7); Multiple guide tubes (36) are fixedly installed on the outside of the inner layer (35); The oil inlet plate (37) is fixedly installed on one side of the inner layer (35); Protective components are installed on the inner wall of the protective shell (3) to prevent stones or impurity particles from entering from the outside.

4. A gear-reduced electric motor for an electrically motorized wheel according to claim 3, characterized in that: The protective components include: Protective plate 1 (32) is set inside the protective shell (3) on one side; Protective plate 2 (33) is set inside the protective shell (3) on the other side; The sealing plug (34) is installed through the bottom of the mounting base (4).

5. A gear-reduced electric motor for an electrically motorized wheel according to claim 4, characterized in that: The buffer section includes: The return baffle (38) is set on one side of the mounting base (4) and is located at the center of the mounting base (4); A spring (39) is provided on one side of the return plate (38); The sleeve (7) has a groove inside that matches the guide tube (36).

6. A gear-reduced electric motor for an electrically motorized wheel according to claim 5, characterized in that: The buffer section further includes: A buffer plate (40) is fixedly installed at one end of a spring (39); The impeller seat (41) is located on the outside of the spring (39); Multiple impeller blades (42) are fixedly mounted above the buffer plate (40).

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