Formula electric vehicle wheel hub reducer and active cooling system

Abstract

The utility model discloses an electric formula racing car wheel edge speed reducer and initiative heat dissipation system, include: wheel hub motor, sun gear, one end is connected with wheel hub motor, planetary carrier, coaxial sleeve is established in the sun gear outside, planetary carrier cover, one end fixed connection with planetary carrier, stand, one end is fixedly connected with the other end of planetary carrier, adapter disc, one end is fixedly connected with wheel hub motor, and the other end is fixedly connected with the other end of stand, a plurality of planetary gears, with the gear wheel engagement connection of another end of sun gear, ring gear, with three planetary gear wheels gear engagement connection, wheel hub, coaxial fixed sleeve is established in the ring gear outside, and coaxial rotation sleeve is established in planetary carrier outside, split wheel hub, one end is fixedly connected with one end of wheel hub, and coaxial rotation sleeve is established in planetary carrier outside, sealing cover, one end is fixedly connected with the other end of wheel hub, air vent, set up in the center of sealing cover, wheel rim, coaxial sleeve is established in wheel hub outside.

Description

Technical Field

[0001] This utility model belongs to the technical field of racing car transmission systems, and specifically relates to an electric Formula One racing car wheel-side reducer and active cooling system. Background Technology

[0002] To cultivate a new generation of Chinese automotive talent and keep pace with the times, the China Society of Automotive Engineers has organized the Formula Student China (FSEC) competition since 2015. Participating teams are required to design and manufacture pure electric formula cars that demonstrate excellent performance in acceleration, handling, stability, and durability. Among these requirements, a well-designed powertrain is crucial for ensuring good power and energy economy, guaranteeing outstanding dynamic results. In recent years, many teams have opted for in-wheel motors paired with self-made in-wheel reducers to achieve independent four-wheel drive, and have consistently achieved excellent results in the competition. However, the existing technical solutions have obvious drawbacks: On the one hand, there are no ready-made wheel hub reducers available on the market, so the existing technical solutions mainly involve designing and manufacturing reducers to match the wheel hub motors. Currently, most self-made reducers have their parts integrated and assembled on the column, and assembly needs to be completed inside the column to form a sealed space, which makes the assembly process complex and difficult. At the same time, most self-made reducers are only suitable for their own racing teams and cannot be commercially manufactured and sold. On the other hand, when the racing car undergoes endurance testing, the wheel hub reducer will experience an increase in internal temperature and air pressure due to long-term high-intensity operation. In addition, its oil lubrication design itself has the problem of sealing difficulties, which can easily lead to oil leakage at the oil seal. Furthermore, the relatively closed space inside the wheel rim causes a large amount of heat generated by the wheel-side transmission system to accumulate over a long period of time, which significantly reduces the transmission efficiency and seriously affects the stable operation and racing performance of the racing car. Utility Model Content

[0003] The purpose of this invention is to provide an electric Formula One car wheel-side reducer and active cooling system, which simplifies the assembly process, is compatible with racing cars using 10-inch rims, reduces the probability of reducer oil leakage, solves the problem of heat accumulation, and improves transmission efficiency.

[0004] The technical solution provided by this utility model is as follows:

[0005] An electric Formula One car wheel-side reducer and active cooling system, comprising:

[0006] Hub motors are capable of outputting power;

[0007] The sun gear has one end connected to the power output end of the hub motor;

[0008] The planet carrier is coaxially rotatably fitted onto the outer wall of the sun gear;

[0009] A planet carrier cover, which is coaxially arranged with the planet carrier and fixedly connected to one end of the planet carrier;

[0010] A column, one end of which is fixedly connected to the other end of the planetary carrier and is coaxially arranged with the planetary carrier;

[0011] The adapter plate has one end fixedly connected to the housing of the hub motor and the other end fixedly connected to the other end of the column, and is coaxially arranged with the column.

[0012] Multiple planetary gears are evenly arranged between the planet carrier and the planet carrier cover along the circumference of the sun gear; the outer ring of each planetary gear meshes with the outer ring gear at the other end of the sun gear.

[0013] A gear ring, the inner ring of which meshes with the plurality of planetary gears; the gear ring is coaxially arranged with the sun gear.

[0014] The hub is coaxially fixedly sleeved on the outer wall of the gear ring and coaxially rotatably sleeved on the outer wall of the planetary carrier;

[0015] A separate hub, one end of which is fixedly connected to one end of the hub and coaxially rotatably sleeved on the outer wall of the planetary carrier;

[0016] A sealing cover, which is fan-shaped, is coaxially arranged with the planetary carrier; one end of the sealing cover is fixedly connected to the other end of the hub.

[0017] A vent valve is located at the center of the outer surface of the sealing cover;

[0018] The rim is coaxially and fixedly fitted onto the outside of the hub.

[0019] Preferably, it also includes:

[0020] A water jacket is coaxially and fixedly fitted onto the outer wall of the hub motor; the water jacket is bonded and fixed to the outer wall of the hub motor with Kaft silicone.

[0021] The brake disc is coaxially and fixedly sleeved on the outside of the release hub;

[0022] A caliper is disposed parallel to the sun gear inside the rim and is fixedly connected to the column; the outer ring of the brake disc is placed in the brake disc receiving groove in the middle of the caliper.

[0023] The spokes are coaxially arranged with the rim and are fixedly connected to the rim.

[0024] Preferably, the sun gear includes:

[0025] The sun gear, the outer ring of which meshes with the plurality of planetary gears;

[0026] A coupling is coaxially arranged with the sun gear; one end of the coupling is fixedly connected to one end of the sun gear, and the other end is fixedly connected to the power output end of the hub motor via a spline.

[0027] The sun gear is a one-piece molded structure.

[0028] Preferably, it also includes:

[0029] Multiple gear shafts are evenly arranged between the planet carrier and the planet carrier cover along the circumference of the sun gear; both ends of the gear shafts are respectively inserted into gear shaft mounting slots in the planet carrier and the planet carrier cover; the planet gears are coaxially rotatably sleeved on the outer wall of the corresponding gear shaft;

[0030] Multiple first needle roller bearings are coaxially sleeved on the corresponding end of the gear shaft near the planetary carrier cover;

[0031] Multiple second needle roller bearings are coaxially mounted on the corresponding gear shaft near the planetary carrier end;

[0032] The inner and outer rings of the first needle roller bearing and the second needle roller bearing are respectively interference-fitted with the gear shaft and the planetary gear;

[0033] Multiple first rolling bearings are coaxially sleeved on the outer wall of the corresponding gear shaft and disposed between the planetary gear and the planetary carrier cover;

[0034] Multiple second rolling bearings are coaxially sleeved on the outer wall of the corresponding gear shaft and disposed between the planetary gear and the planet carrier.

[0035] Preferably, the planetary gear includes:

[0036] The outer ring of the large planetary gear meshes with the sun gear; the large planetary gear is coaxially rotatably mounted on the end of the corresponding gear shaft near the planet carrier cover.

[0037] The small planetary gear has one end fixedly connected to one end of the large planetary gear; the small planetary gear is coaxially rotatably sleeved on the corresponding gear shaft near the end of the planet carrier.

[0038] The planetary gear is a one-piece molded structure.

[0039] Preferably, the outer ring of the gear ring and the inner ring of the hub are fixedly connected by a standard rectangular spline.

[0040] Preferably, it also includes:

[0041] The first lip seal ring is coaxially sleeved on the outer wall of the sun gear and disposed at one end of the planet carrier near the column;

[0042] The second lip seal ring is coaxially sleeved on the outer wall of the planetary carrier and is located at one end of the separation hub near the hub;

[0043] A first deep groove ball bearing is coaxially fixedly sleeved on the outer wall of the middle part of the sun gear; the inner and outer rings of the first deep groove ball bearing are respectively interference-fitted with the sun gear and the planet carrier;

[0044] A second deep groove ball bearing is coaxially sleeved on the outer wall of the planetary carrier and disposed at one end of the hub near the split hub; the inner and outer rings of the second deep groove ball bearing are respectively interference-fitted with the planetary carrier and the hub;

[0045] A third deep groove ball bearing is coaxially sleeved on the outer wall of the planetary carrier and located at the end of the release hub away from the hub; the inner and outer rings of the third deep groove ball bearing are respectively interference-fitted with the planetary carrier and the release hub.

[0046] Preferably, it also includes:

[0047] The first deep groove ball bearing fixing snap ring is coaxially sleeved on the outer wall of the middle part of the sun gear, which can limit the first deep groove ball bearing;

[0048] A retaining ring is provided for the gear ring, which is coaxially disposed with the gear ring at one end of the hub near the sealing cover.

[0049] Preferably, the sealing cap includes:

[0050] A disc, with the aforementioned vent valve located at its center;

[0051] A ring is coaxially arranged with the disk; one end of the ring is fixedly connected to the inner surface of the disk, and the other end is fixedly connected to the hub.

[0052] Multiple fan blades, which are rectangular plates, are evenly and at an angle arranged on the outer wall of the ring along the circumference of the ring.

[0053] The beneficial effects of this utility model are: the electric Formula racing wheel-side reducer and active cooling system provided by this utility model have a simpler assembly process, are compatible with most racing cars using 10-inch rims, effectively reduce the probability of reducer oil leakage, solve the problem of heat accumulation on the inner side of the rim during long-term operation, and greatly improve transmission efficiency. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the overall external structure of the electric Formula One racing car wheel-side reducer and active cooling system described in this utility model.

[0055] Figure 2This is a schematic diagram of the overall internal structure of the electric Formula One racing car wheel-side reducer and active cooling system described in this utility model.

[0056] Figure 3 This is a left view of the electric Formula One racing car wheel-side reducer and active cooling system described in this utility model.

[0057] Figure 4 This is a cross-sectional view of AA.

[0058] Figure 5 This is a schematic diagram of the outer structure of the electric Formula One racing car wheel-side reducer described in this utility model.

[0059] Figure 6 This is a schematic diagram of the inner structure of the electric Formula One racing car wheel-side reducer described in this utility model.

[0060] Figure 7 This is a front view of the electric Formula One racing wheel-side reducer described in this utility model.

[0061] Figure 8 This is an exploded view of the electric Formula One racing car wheel-side reducer and active cooling system described in this utility model.

[0062] Figure 9 This is a schematic diagram of the overall structure of the planetary gear described in this utility model.

[0063] Figure 10 This is a schematic diagram of the overall structure of the sun gear described in this utility model.

[0064] Figure 11 This is a schematic diagram of the overall structure of the sealing cap described in this utility model.

[0065] Figure 12 This is a schematic diagram of the outer structure of the toothed ring, hub, and separate hub connection relationship described in this utility model.

[0066] Figure 13 This is a schematic diagram of the inner structure of the gear ring, hub, and separate hub connection relationship described in this utility model.

[0067] Figure 14 This is a schematic diagram of the outer structure of the connection between the brake disc and the release hub described in this utility model.

[0068] Figure 15 This is a schematic diagram of the inner structure of the connection between the brake disc and the release hub described in this utility model.

[0069] Figure 16 This is a schematic diagram of the connection relationship between the connecting disc and the hub motor described in this utility model.

[0070] Reference numerals: Hub motor 110, water jacket 120, adapter plate 130, column 140, hub 151, separate hub 152, rim 160, spoke 170, brake disc 180, caliper 190, brake disc receiving groove 191, sun gear 210, sun gear 211, coupling 212, spline 213, planetary carrier 221, planetary carrier cover 222, gear shaft 230, planetary gear 240, large planetary gear 241, small planetary gear 242, gear ring 250, standard rectangular spline 251, sealing cover 260, disc 261, circle Ring 262, fan blade 263, vent valve 270, first deep groove ball bearing 311, second deep groove ball bearing 312, third deep groove ball bearing 313, first deep groove ball bearing retaining circlip 321, gear ring retaining circlip 322, first lip seal 331, second lip seal 332, first O-ring 333, second O-ring 334, first needle roller bearing 341, second needle roller bearing 342, first rolling bearing 351, second rolling bearing 352, connecting positioning copper sleeve 360, hub motor and adapter plate connecting threaded bolt M4×10 411, M5×14 bolt connecting adapter plate and column; 412, M5 metal lock nut connecting adapter plate and column; 413, M8×45 threaded bolt connecting column and caliper; 420, M8×25 threaded bolt connecting column and planetary carrier; 430, M6×25 threaded bolt connecting planetary carrier and planetary carrier cover; 440, M3×12 bolt connecting sealing cover and hub; 451, M3 metal lock nut connecting sealing cover and hub; 452, M6×14 bolt connecting spoke and rim; 461, M6 metal lock nut connecting spoke and rim; 462, M6×30 bolt connecting hub and rim; 471, M6 metal lock nut connecting hub and rim; 472, M6×25 bolt connecting hub and decoupled hub; 481, M6 metal lock nut connecting hub and decoupled hub. 482, M5×14 bolt for separating the wheel hub and brake disc; 491, M5 metal lock nut for separating the wheel hub and brake disc; 492. Detailed Implementation

[0071] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0072] like Figure 1-9 As shown, this utility model provides an electric Formula One car wheel-side reducer and active cooling system, which includes: a hub motor 110, which is capable of outputting power; in this embodiment, an AMK hub motor is used, and the hub motor 110 in the figure is a simplified structure and is only for illustration. A water jacket 120 is coaxially fixedly sleeved on the outer wall of the hub motor 110; the water jacket 120 and the outer wall of the hub motor 110 are bonded and fixed with Kaft silicone to prevent water leakage.

[0073] The sun gear 210 has one end connected to the power output end of the hub motor 110.

[0074] A planetary carrier 221 is coaxially rotatably fitted onto the outer wall of the sun gear 210 via a first deep groove ball bearing 311. The first deep groove ball bearing 311 is coaxially and fixedly fitted onto the outer wall of the middle portion of the sun gear 210, with its outer ring fixedly connected to the inner ring of the planetary carrier 221. The inner ring of the planetary carrier 221 has a bearing mounting groove, in which the first deep groove ball bearing 311 is placed. The inner and outer rings of the first deep groove ball bearing 311 are respectively interference-fitted with the sun gear 210 and the planetary carrier 221. In this embodiment, the first deep groove ball bearing 311 is a 61803 deep groove ball bearing. A first deep groove ball bearing retaining circlip 321 is coaxially fitted onto the outer wall of the middle portion of the sun gear 210, positioned between the sun gear 210 and the planetary carrier 221, and can limit the movement of the first deep groove ball bearing 311. A first lip seal ring 331 is coaxially sleeved on the outer wall of the sun gear 210 and located at one end of the planet carrier 221 near the column 140. The first lip seal ring 331 is positioned between the sun gear 210 and the planet carrier 221, further ensuring a seal between them. A planet carrier cover 222 is coaxially mounted with the planet carrier 221 and fixedly connected to one end of the planet carrier 221 by bolts. Multiple connecting positioning copper sleeves 360 have their ends inserted into the connecting positioning copper sleeve grooves in the planet carrier 221 and the planet carrier cover 222, respectively. In this embodiment, there are three connecting positioning copper sleeves 360. The planet carrier cover 222 and the planet carrier 221 are fixedly connected by three planet carrier-to-planet carrier cover connecting threaded bolts M6×25 440 passing through the connecting positioning copper sleeves 360, and are mechanically secured with wire.

[0075] The column 140 has one end fixedly connected to the other end of the planetary carrier 221 by bolts and is coaxially arranged with the planetary carrier 221. In this embodiment, the column 140 and the planetary carrier 221 are fixedly connected by 6 M8×25 430 threaded bolts connecting the column and the planetary carrier, and are wrapped with iron wire to achieve mechanical anti-loosening.

[0076] The adapter plate 130 has one end fixedly connected to the housing of the hub motor 110 by bolts, and the other end fixedly connected to the other end of the column 140 by bolts, and is coaxially arranged with the column 140. In this embodiment, the adapter plate 130 and the column 140 are fixedly connected by six adapter plate to column connecting bolts M5×14 412 and six adapter plate to column connecting metal anti-loosening nuts M5 413. The connecting metal anti-loosening nuts can prevent the connecting bolts from loosening.

[0077] Multiple gear shafts 230 are evenly arranged between the planet carrier 221 and the planet carrier cover 222 along the circumference of the sun gear 210; both ends of the gear shafts 230 are respectively inserted into gear shaft mounting slots in the planet carrier 221 and the planet carrier cover 222; in this embodiment, the number of gear shafts 230 is 3. Multiple planet gears 240 are evenly arranged between the planet carrier 221 and the planet carrier cover 222 along the circumference of the sun gear 210; the planet gears 240 are coaxially rotatably sleeved on the outer wall of the corresponding gear shaft 230; the outer ring of the planet gear 240 meshes with the outer ring gear at the other end of the sun gear 210; in this embodiment, the number of planet gears 240 is 3. Each planetary gear 240 includes: a large planetary gear 241, the outer ring of which is meshed with the sun gear 210; the large planetary gear 241 is coaxially rotatably sleeved on the corresponding gear shaft 230 near the end of the planet carrier cover 222; a small planetary gear 242, one end of which is fixedly connected to one end of the large planetary gear 241; the small planetary gear 242 is coaxially rotatably sleeved on the corresponding gear shaft 230 near the end of the planet carrier 221; wherein, the planetary gear 240 is a one-piece molded structure. Multiple first needle roller bearings 341 are coaxially sleeved on the corresponding end of the gear shaft 230 near the planetary carrier cover 222; multiple second needle roller bearings 342 are coaxially sleeved on the corresponding end of the gear shaft 230 near the planetary carrier 221; wherein, the first needle roller bearings 341 and the second needle roller bearings 342 are both disposed between the gear shaft 230 and the planetary gear 240; the inner rings at both ends of the planetary gear 240 are provided with needle roller bearing mounting grooves, and the first needle roller bearings 341 and the second needle roller bearings 342 are both disposed in the needle roller bearing mounting grooves; The inner rings of both the first needle roller bearing 341 and the second needle roller bearing 342 are fixedly connected to the gear shaft 230, and their outer rings are fixedly connected to the planetary gear 240. The inner and outer rings of the first needle roller bearing 341 are respectively interference-fitted with the needle roller bearing mounting grooves in the gear shaft 230 and the large planetary gear 241. The inner and outer rings of the second needle roller bearing 342 are respectively interference-fitted with the needle roller bearing mounting grooves in the gear shaft 230 and the small planetary gear 242. In this embodiment, both the first needle roller bearing 341 and the second needle roller bearing 342 are 10×14×10 needle roller bearings.Multiple first rolling bearings 351 are coaxially sleeved on the outer wall of the corresponding gear shaft 230 and disposed between the large planetary gear 241 and the planetary carrier cover 222. One side surface of the first rolling bearing 351 is in contact with one end of the first needle roller bearing 341, and the other side surface is in contact with the planetary carrier cover 222. Multiple second rolling bearings 352 are coaxially sleeved on the outer wall of the corresponding gear shaft 230 and disposed between the small planetary gear 242 and the planetary carrier 221. One side surface of the second rolling bearing 352 is in contact with one end of the second needle roller bearing 342, and the other side surface is in contact with the planetary carrier 221. In this embodiment, the number of the first needle roller bearing 341, the second needle roller bearing 342, the first rolling bearing 351, and the second rolling bearing 352 are all three.

[0078] A gear ring 250, the inner ring of which meshes with the three planetary gears 240 simultaneously; the gear ring 250 is coaxially arranged with the sun gear 210. A hub 151 is coaxially fixedly sleeved on the outer wall of the gear ring 250; and is coaxially rotatably sleeved on the outer wall of the planet carrier 221 through a second deep groove ball bearing 312. The second deep groove ball bearing 312 is coaxially sleeved on the outer wall of the planetary carrier 221 and disposed at the end of the hub 151 near the separating hub 152. The inner ring of the second deep groove ball bearing 312 is fixedly connected to the planetary carrier 221, and the outer ring is fixedly connected to the hub 151. The inner ring of the hub 151 near the separating hub 152 is provided with a bearing mounting groove, in which the second deep groove ball bearing 312 is placed. The inner and outer rings of the second deep groove ball bearing 312 are respectively interference-fitted with the planetary carrier 221 and the hub 151. In this embodiment, the second deep groove ball bearing 312 is a 61816 bearing. A gear ring retaining circlip 322 is coaxially disposed with the gear ring 250 on the inner ring of the hub 151 near the sealing cover 260, which can limit the position of the gear ring 250 and prevent the gear ring 250 from moving or loosening. A separate hub 152 is fixedly connected at one end to one end of the hub 151 by bolts, and is coaxially rotatably sleeved on the outer wall of the planetary carrier 221 by a third deep groove ball bearing 313. The third deep groove ball bearing 313 is coaxially sleeved on the outer wall of the planetary carrier 221 and is located at the end of the separate hub 152 away from the hub 151. The inner ring of the third deep groove ball bearing 313 is fixedly connected to the planetary carrier 221, and the outer ring is fixedly connected to the separate hub 152. The inner ring of the separate hub 152 at the end away from the hub 151 has a bearing mounting groove, in which the third deep groove ball bearing 313 is placed. The inner and outer rings of the third deep groove ball bearing 313 are respectively interference-fitted with the planetary carrier 221 and the separate hub 152. In this embodiment, the third deep groove ball bearing 313 is a 61816 bearing. A second lip seal 332 is coaxially sleeved on the outer wall of the planetary carrier 221 and disposed at one end of the separator hub 152 near the hub 151. The second lip seal 332 is disposed within the bearing mounting groove of the inner ring of the separator hub 152, further ensuring the sealing between the separator hub 152 and the planetary carrier 221. A first O-ring 333 is disposed within the O-ring mounting groove at the connection between the separator hub 152 and the hub 151, further ensuring the sealing between the separator hub 152 and the hub 151.

[0079] The sealing cover 260 is fan-shaped and coaxially arranged with the planetary carrier 221. One end of the sealing cover 260 is fixedly connected to the other end of the hub 151 by bolts. In this embodiment, the sealing cover 260 and the hub 151 are fixedly connected by six sealing cover and hub connecting bolts M3×12 451 and six sealing cover and hub connecting metal anti-loosening nuts M3 452. The connecting metal anti-loosening nuts can prevent the connecting bolts from loosening.

[0080] The second O-ring 334 is disposed in the O-ring mounting groove at the connection between the sealing cover 260 and the hub 151, further ensuring the sealing performance between the sealing cover 260 and the hub 151.

[0081] A vent valve 270 is located at the center of the outer surface of the sealing cover 260 and is threadedly connected to the sealing cover 260. Because the high-speed operation of the reducer generates heat, a pressure difference exists between the inside of the reducer and the outside, affecting the sealing effect of the reducer. Furthermore, the lubricating oil inside the reducer is affected by centrifugal force as it rotates, causing it to adhere tightly to the inner wall of the reducer. Therefore, the vent valve 270 is installed at the center of the sealing cover 260. The vent valve 270 can discharge gas, balance the air pressure, and during later maintenance of the reducer, the lubricating oil can be replaced through the mounting hole of the vent valve 270.

[0082] The rim 160 is coaxially fixed to the outside of the hub 151 by bolts. In this embodiment, the hub 151 and the rim 160 are fixedly connected by six hub-to-rim connecting bolts M6×30 471 and six hub-to-rim connecting metal anti-loosening nuts M6 472. The connecting metal anti-loosening nuts can prevent the connecting bolts from loosening.

[0083] The spokes 170 are coaxially arranged with the rim 160 and are fixedly connected to the rim 160 by bolts. In this embodiment, the spokes 170 and the rim 160 are fixedly connected by six spoke-to-rim connecting bolts M6×14 461 and six spoke-to-rim connecting metal anti-loosening nuts M6 462. The connecting metal anti-loosening nuts can prevent the connecting bolts from loosening.

[0084] The brake disc 180 is coaxially fixed to the outer side of the end of the release hub 152 away from the hub 151 by bolts.

[0085] A caliper 190 is disposed parallel to the sun gear 210 inside the rim 160 and is fixedly connected to the column 140 by bolts. The outer ring of the brake disc 180 is placed in the brake disc receiving groove 191 in the middle of the caliper 190, and the caliper 190 cooperates with the brake disc 180 for braking. In this embodiment, the caliper 190 and the column 140 are fixedly connected by two M8×45 420 threaded bolts connecting the column and the caliper, and are wrapped with wire to achieve mechanical anti-loosening. Among them, the hub 151 and the separate hub 152 can be integrated into one design; the planetary gear 240 can be separated into two parts, a large planetary gear 241 and a small planetary gear 242, for easy processing; the planetary gear 240 and the gear shaft 230 can be integrated into one design; the column 140 and the planet carrier 221 can be integrated into one design; the water jacket 120 and the adapter plate 130 can be integrated into one design.

[0086] The working principle of the electric Formula One racing wheel-side reducer and active cooling system provided by this utility model is as follows: The power output end of the hub motor 110 outputs torque, driving the sun gear 210 to rotate; the sun gear 210 meshes with the large planetary gear 241, thereby driving the large planetary gear 241 and the small planetary gear 242 to rotate; the small planetary gear 242 meshes with the gear ring 250, and under the driving force of the rotation of the small planetary gear 242, the gear ring 250 rotates in the same direction as the sun gear 210; the gear ring 250 is fixedly connected to the hub 151, thereby driving the hub 151 to rotate; the hub 151 is fixedly connected to the sealing cover 260, thereby causing the sealing cover 260 to rotate synchronously with the hub 151, dissipating heat from the inner side of the rim 160.

[0087] The power output from the hub motor 110 is reduced in speed and increased in torque after passing through the reducer, and is finally output through the hub 151. Meanwhile, the sealing cover 260 is fan-shaped, and the sealing cover 260 dissipates heat from the inside of the rim 160 by rotating, solving the problem of heat accumulation on the inside of the rim during long-term operation.

[0088] like Figure 10 As shown, the sun gear 210 includes: a sun gear 211, the outer ring of which is simultaneously meshed with the outer rings of the three large planetary gears 241; a coupling 212, which is coaxially arranged with the sun gear 211; one end of the coupling 212 is fixedly connected to one end of the sun gear 211, and the other end is fixedly connected to the power output end of the hub motor 110 through a spline 213; wherein, the sun gear 210 is an integrally formed structure.

[0089] like Figure 11As shown, the sealing cover 260 includes: a disc 261 with the vent valve 270 at its center; a ring 262 coaxially arranged with the disc 261; one end of the ring 262 is fixedly connected to the inner surface of the disc 261, and the other end is fixedly connected to the hub 151 by bolts; a plurality of fan blades 263, which are rectangular plates, evenly and at an angle along the circumference of the ring 262 on the outer wall of the ring 262; in this embodiment, the number of fan blades 263 is 12.

[0090] like Figure 12-13 As shown, the inner ring of the hub 151 and the outer ring of the gear ring 250 are fixedly connected by a standard rectangular spline 251. In this embodiment, the separate hub 152 and the hub 151 are fixedly connected by six hub-to-separate hub connecting bolts M6×25 481 and six hub-to-separate hub connecting metal anti-loosening nuts M6 482.

[0091] like Figure 14-15 As shown, in this embodiment, the brake disc 180 and the separate hub 152 are fixedly connected by six separate hub and brake disc connecting bolts M5×14 491 and six separate hub and brake disc connecting metal anti-loosening nuts M5 492. The connecting metal anti-loosening nuts can prevent the connecting bolts from loosening.

[0092] like Figure 16 As shown, in this embodiment, the adapter plate 130 and the hub motor 110 are fixedly connected by four hub motor and adapter plate connecting bolts M4×10 411, and are wrapped with iron wire to achieve mechanical anti-loosening.

[0093] The electric Formula One racing wheel-side reducer and active cooling system provided by this utility model have a simpler assembly process, are compatible with most racing cars using 10-inch rims, effectively reduce the probability of reducer oil leakage, solve the problem of heat accumulation on the inner side of the rim during long-term operation, and greatly improve transmission efficiency.

[0094] This utility model provides an electric Formula One racing wheel-side reducer and active cooling system. The fan sealing cover design quickly dissipates heat generated on the inner side of the wheel rim during prolonged operation of the reducer and braking system, significantly improving the transmission efficiency of the wheel-side system during long-term operation and preventing heat buildup from affecting normal system operation. The reducer housing is directly connected to the wheel rim, simplifying complex connection methods. The power output from the motor is directly applied to the tire after being reduced and amplified by the reducer, eliminating complex transmission devices, greatly reducing the weight of the transmission system, minimizing power loss, and making power transmission more direct and efficient. The reducer is equipped with a vent valve installed at the center of the sealing cover, which can discharge excess gas generated by the high-speed operation of the reducer, balancing the internal and external air pressure and preventing pressure differences from affecting the sealing effect. Furthermore, during later maintenance of the reducer, the lubricating oil can be changed through the vent valve mounting hole, making maintenance operations simpler. The wheel hub adopts a split design, consisting of a hub and a separate hub. During assembly, the hub and separate hub are fixedly connected by bolts. The bearings are mounted on the two hubs with an interference fit, eliminating the need to consider the installation sequence of the planetary gears and the bearings on the hub and separate hub, and eliminating the need to insert the planetary gears before installing the bearings. This allows for easy disassembly, simplifying the assembly process and improving efficiency. The gear ring and hub use a standard rectangular spline connection, ensuring good stress distribution and uniform stress distribution at the contact point. This indirectly increases component strength, extends component life, reduces damage caused by uneven stress, and decreases component replacement frequency, thus reducing costs in the long term. The brake disc and separate hub are bolted together, replacing the traditional disc-pin connection. This allows for a smaller brake disc outer diameter, accommodating 10-inch rims for Formula Student racing cars and meeting the specific vehicle requirements. The sun gear is integrated with the coupling and sun gear in a single design, saving materials and reducing processing costs, improving component economy. A bearing in the center of the sun gear provides fixed support, improving stability during high-speed rotation and ensuring smooth transmission. The design of the adapter plate for connecting the motor solves the problem that the motor cannot be directly connected to the column due to the special position of the motor mounting hole. During assembly, the motor is first connected to the adapter plate, and then the adapter plate is connected to the column, which improves the convenience of motor installation and reduces the installation difficulty.

[0095] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A wheel-side reducer and active cooling system for an electric Formula One racing car, characterized in that, include: Hub motors are capable of outputting power; The sun gear has one end connected to the power output end of the hub motor; The planet carrier is coaxially rotatably fitted onto the outer wall of the sun gear; A planet carrier cover, which is coaxially arranged with the planet carrier and fixedly connected to one end of the planet carrier; A column, one end of which is fixedly connected to the other end of the planetary carrier and is coaxially arranged with the planetary carrier; The adapter plate has one end fixedly connected to the housing of the hub motor and the other end fixedly connected to the other end of the column, and is coaxially arranged with the column. Multiple planetary gears are evenly arranged between the planet carrier and the planet carrier cover along the circumference of the sun gear; the outer ring of each planetary gear meshes with the outer ring gear at the other end of the sun gear. A gear ring, the inner ring of which meshes with the plurality of planetary gears; the gear ring is coaxially arranged with the sun gear. The hub is coaxially fixedly sleeved on the outer wall of the gear ring and coaxially rotatably sleeved on the outer wall of the planetary carrier; A separate hub, one end of which is fixedly connected to one end of the hub and coaxially rotatably sleeved on the outer wall of the planetary carrier; A sealing cover, which is fan-shaped, is coaxially arranged with the planetary carrier; one end of the sealing cover is fixedly connected to the other end of the hub. A vent valve is located at the center of the outer surface of the sealing cover; The rim is coaxially and fixedly fitted onto the outside of the hub.

2. The electric Formula One car wheel-side reducer and active cooling system according to claim 1, characterized in that, Also includes: A water jacket is coaxially and fixedly fitted onto the outer wall of the hub motor; the water jacket is bonded and fixed to the outer wall of the hub motor with Kaft silicone. The brake disc is coaxially and fixedly sleeved on the outside of the release hub; A caliper is disposed parallel to the sun gear inside the rim and is fixedly connected to the column; the outer ring of the brake disc is placed in the brake disc receiving groove in the middle of the caliper. The spokes are coaxially arranged with the rim and are fixedly connected to the rim.

3. The electric Formula One car wheel-side reducer and active cooling system according to claim 1, characterized in that, The sun gear includes: The sun gear, the outer ring of which meshes with the plurality of planetary gears; A coupling is coaxially arranged with the sun gear; one end of the coupling is fixedly connected to one end of the sun gear, and the other end is fixedly connected to the power output end of the hub motor via a spline. The sun gear is a one-piece molded structure.

4. The electric Formula One car wheel-side reducer and active cooling system according to claim 3, characterized in that, Also includes: Multiple gear shafts are evenly arranged between the planet carrier and the planet carrier cover along the circumference of the sun gear; both ends of the gear shafts are respectively inserted into gear shaft mounting slots in the planet carrier and the planet carrier cover; the planet gears are coaxially rotatably sleeved on the outer wall of the corresponding gear shaft; Multiple first needle roller bearings are coaxially sleeved on the corresponding end of the gear shaft near the planetary carrier cover; Multiple second needle roller bearings are coaxially mounted on the corresponding gear shaft near the planetary carrier end; The inner and outer rings of the first needle roller bearing and the second needle roller bearing are respectively interference-fitted with the gear shaft and the planetary gear; Multiple first rolling bearings are coaxially sleeved on the outer wall of the corresponding gear shaft and disposed between the planetary gear and the planetary carrier cover; Multiple second rolling bearings are coaxially sleeved on the outer wall of the corresponding gear shaft and disposed between the planetary gear and the planet carrier.

5. The electric Formula One car wheel-side reducer and active cooling system according to claim 4, characterized in that, The planetary gear includes: The outer ring of the large planetary gear meshes with the sun gear; the large planetary gear is coaxially rotatably mounted on the end of the corresponding gear shaft near the planet carrier cover. The small planetary gear has one end fixedly connected to one end of the large planetary gear; the small planetary gear is coaxially rotatably sleeved on the corresponding gear shaft near the end of the planet carrier. The planetary gear is a one-piece molded structure.

6. The electric Formula One car wheel-side reducer and active cooling system according to claim 1, characterized in that, The outer ring of the gear ring and the inner ring of the hub are fixedly connected by a standard rectangular spline.

7. The electric Formula One car wheel-side reducer and active cooling system according to claim 1, characterized in that, Also includes: The first lip seal ring is coaxially sleeved on the outer wall of the sun gear and disposed at one end of the planet carrier near the column; The second lip seal ring is coaxially sleeved on the outer wall of the planetary carrier and is located at one end of the separation hub near the hub; A first deep groove ball bearing is coaxially fixedly sleeved on the outer wall of the middle part of the sun gear; the inner and outer rings of the first deep groove ball bearing are respectively interference-fitted with the sun gear and the planet carrier; A second deep groove ball bearing is coaxially sleeved on the outer wall of the planetary carrier and disposed at one end of the hub near the split hub; the inner and outer rings of the second deep groove ball bearing are respectively interference-fitted with the planetary carrier and the hub; A third deep groove ball bearing is coaxially sleeved on the outer wall of the planetary carrier and located at the end of the release hub away from the hub; the inner and outer rings of the third deep groove ball bearing are respectively interference-fitted with the planetary carrier and the release hub.

8. The electric Formula One car wheel-side reducer and active cooling system according to claim 1, characterized in that, Also includes: The first deep groove ball bearing fixing snap ring is coaxially sleeved on the outer wall of the middle part of the sun gear, which can limit the first deep groove ball bearing; A retaining ring is provided for the gear ring, which is coaxially disposed with the gear ring at one end of the hub near the sealing cover.

9. The electric Formula One car wheel-side reducer and active cooling system according to claim 1, characterized in that, The sealing cap includes: A disc, with the aforementioned vent valve located at its center; A ring is coaxially arranged with the disk; one end of the ring is fixedly connected to the inner surface of the disk, and the other end is fixedly connected to the hub. Multiple fan blades, which are rectangular plates, are evenly and at an angle arranged on the outer wall of the ring along the circumference of the ring.

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