Electric formula racing car wheel rim system with central locking wheel structure

Abstract

The utility model discloses a kind of electric formula racing car rim system with central locking wheel structure, comprising: driving motor;Separation hub, coaxially fixedly arranged on the end face of the driving motor output end;Hub, one end coaxially fixedly arranged on the separation hub;Sun gear, spline connection the output end of the driving motor;Planet carrier cover, inner ring rotatably arranged on the sun gear, outer ring rotatably supported and arranged on the separation hub;At least three planetary gears, including two coaxially connected first pinion and second pinion;Planet carrier, top and the planet carrier cover fixed connection, middle part rotatably supported and arranged on the inner wall of the hub;Gear shaft, both ends are respectively fixedly arranged on the planet carrier cover and the planet carrier;Gear ring;Rim, arranged on the outside of the hub. By planet carrier directly with rim connection, make power after reducer processing directly act on tire, reduce power loss.

Description

Technical Field

[0001] This utility model relates to an electric Formula One racing wheel-side system with a central locking wheel structure, belonging to the field of Formula One racing technology. Background Technology

[0002] As the only Formula E competition for university students in China, the FSEC competition requires participants to design, manufacture, and debug an electric race car using existing resources. In Formula E racing, the wheel-side drive system is one of the core systems determining the car's performance, especially since it directly affects the car's power output, transmission efficiency, and reliability. In the FSEC competition, an increasing number of teams are focusing on the design of distributed electric drive systems and wheel-side reducers. By directly connecting the motor to the reducer and wheels, the drive system can transmit power more efficiently, reduce losses in the mechanical transmission process, and leave sufficient space in the cabin to accommodate high and low voltage electrical systems. Most teams adopting this approach have achieved good results.

[0003] Since there are no mass-produced hub reducers and posts available on the market to match the selected motors, the current technical solution mainly involves designing and manufacturing the reducers to match the AMK hub motors. Currently, most of the components of these self-made reducers are integrated and assembled on the post, requiring assembly inside the post, which makes the assembly process complex and difficult. Furthermore, most power output methods use hub output, resulting in a complex and cumbersome connection between the wheel rim and the reducer housing.

[0004] The components of the self-made wheel rim system are only suitable for the race cars they produce, making it impossible to mass-produce and sell them in a standardized manner. Furthermore, during endurance testing of race cars, quick and reliable tire changes are required, but the complex connection between the wheel rim and the gearbox housing significantly reduces wheel-changing efficiency. Utility Model Content

[0005] This invention designs and develops an electric Formula One racing wheel-side system with a central locking wheel structure. The system is directly connected to the wheel rim via a planetary carrier of a reducer, allowing power to be processed by the reducer and directly applied to the tire, thus reducing power loss.

[0006] Another objective of this invention is to enable quick assembly and disassembly, minimize space occupation, and achieve high integration.

[0007] The technical solution provided by this utility model is as follows:

[0008] An electric Formula One racing wheel-side system with a central locking wheel structure includes:

[0009] Drive motor;

[0010] The separate hub is coaxially fixed on the end face of the drive motor output end;

[0011] The hub has one end coaxially fixed on the separate hub, and the other end of the hub extends outward on both sides to form a column structure.

[0012] The sun gear, whose spline connection is made to the output terminal of the drive motor;

[0013] The planetary carrier cover has its inner ring rotatably mounted on the sun gear and its outer ring rotatably supported on the separator hub.

[0014] At least three planetary gears, including two coaxially connected first and second sub-gears, the inner ring of the first sub-gear is rotatably supported on the planet carrier cover, and the outer ring is matched and meshed with the sun gear; the diameter of the first sub-gear is larger than that of the second sub-gear;

[0015] The planetary carrier has its top fixedly connected to the planetary carrier cover, and its middle part is rotatably supported on the inner wall of the hub.

[0016] A gear shaft, with its two ends fixedly mounted on the planet carrier cover and the planet carrier, respectively; the planet gear is loosely fitted on the gear shaft;

[0017] The outer ring of the gear ring is fixedly mounted on the inner wall of the hub, and the inner ring meshes with the outer ring of the second gear.

[0018] A rim is disposed on the outside of the hub, and the lower part of the planetary carrier is fixedly disposed on the inner wall of the rim.

[0019] Preferably, it also includes:

[0020] The spokes are fixed at one end to the lower part of the planetary carrier and at the other end to the inner wall of the rim.

[0021] A central nut, having an internal thread, is fitted to the external thread located at the lower part of the planetary carrier.

[0022] Preferably, it also includes:

[0023] A sealing cap is fixedly mounted on the end face of the output end of the drive motor;

[0024] The separate hub is fixedly connected to the sealing cover.

[0025] Preferably, the number of planetary gears is three.

[0026] Preferably, one end of the planetary carrier extends outward to form three connecting parts, the top of which is fixedly connected to the planetary carrier cover.

[0027] Preferably, it also includes:

[0028] The vent valve is located in the lower middle part of the planetary carrier.

[0029] Preferably, it also includes:

[0030] A pin, which passes through the planetary carrier and is located at the bottom of the central nut, is used to limit the movement of the central nut.

[0031] The beneficial effects of this utility model are as follows: The electric Formula One racing wheel-side system with a central locking wheel structure provided by this utility model can reasonably arrange the structure of each component of the wheel-side within the limited wheel-side space, solve the problem of quick connection between the wheel and the reducer, and transmit the power output of the motor to the tire more efficiently and stably, thereby improving the tire changing efficiency during the race.

[0032] In this system, the integrated design of the wheel hub and pillar improves the integration of the wheel-side system, allowing it to occupy less space within the rim, enhancing the strength of the connection between the reducer and the suspension, and facilitating disassembly. The planetary carrier of the reducer connects directly to the rim, simplifying the complex connection method. The power output from the motor is directly applied to the tire after being reduced in speed and torque by the reducer, eliminating the need for a complex transmission device, greatly reducing the weight of the transmission system, and minimizing power loss.

[0033] The vent valve is installed at the center of the planetary carrier. This valve allows for gas discharge, balancing air pressure, and facilitates lubrication through the vent valve's mounting hole during later maintenance. During assembly, the hub and release hub are fixed with bolts and interference fits, with bearings mounted on separate hubs. This eliminates the need to consider the installation sequence of the planetary gears and bearings on the hub and release hub, simplifying the assembly process. Previously, the planetary gears would have to be installed before the bearings and could not be easily disassembled. The planetary gears are designed as two separate gears, large and small, with an integrated design that significantly improves the overall rigidity and stability of the gears. It also ensures coaxiality and reduces transmission errors. This design allows for more weight-reduction grooves while maintaining strength. The planetary carrier outputs power, optimizing the power transmission path and distributing the load evenly across the three planetary gears, improving the overall load-bearing capacity and service life of the reducer. A shorter sun gear reduces weight, saves materials during machining, lowers processing costs, and improves the economic efficiency of the parts. It also ensures coaxiality when the sun gear outputs power, guaranteeing stability during high-speed rotation. A sealing cover is installed on the end face of the motor, which serves as an adapter plate. During assembly, the motor is first connected to the adapter plate, and then the adapter plate is connected to the column. Attached Figure Description

[0034] Figure 1This is a cross-sectional structural diagram of the electric Formula One racing wheel-side system with a central locking wheel structure described in this utility model.

[0035] Figure 2 This is an exploded view of the Formula E racing wheel-side system with a central locking wheel structure described in this utility model.

[0036] Figure 3 This is a schematic diagram of the planetary gear described in this utility model.

[0037] Figure 4 This is a schematic diagram of the planetary carrier described in this utility model. Detailed Implementation

[0038] 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.

[0039] like Figure 1-4 As shown, this utility model provides an electric Formula One racing wheel-side system with a central locking wheel structure, including: a vent valve 1, a pin 2, a planetary carrier 3, a central nut 4, a metal anti-loosening nut for the spoke-to-rim connection flange 5, an internal hex bolt for the spoke-to-rim connection 6, a spoke 7, a rim 8, a skeleton oil seal at the hub-to-planetary carrier connection 9, a deep groove ball bearing at the hub-to-planetary carrier connection 10, a hub 11, a gear ring 12, a gear ring retaining circlip 13, an O-ring at the hub-to-split hub connection 14, a split hub 15, and an O-ring at the sealing cap-to-split hub connection 16. 17. Sealing cover; 18. Threaded bolt connecting planetary carrier and planetary carrier cover; 19. Drive motor; 20. Planetary carrier cover; 21. Deep groove ball bearing at the junction of the release hub and planetary carrier cover; 22. Washer; 23. Needle roller bearing; 24. Gear shaft; 25. Planetary gear; 26. Deep groove ball bearing at the junction of the sun gear and planetary carrier cover; 27. Sun gear; 28. Threaded bolt connecting motor and sealing cover; 29. ​​Metal anti-loosening nut connecting sealing cover and release hub; 30. Bolt connecting sealing cover and release hub; 31. Bolt connecting hub and release hub; 32. Metal anti-loosening nut connecting hub and release hub.

[0040] A drive motor 19 is located at one end of the wheel-side system. The output end of the drive motor 19 is connected to the sun gear via a spline. A sealing cover 17 is fixedly located on the end face of the drive motor output end. One end of the separation hub 14 is fixedly connected to the sealing cover 17, and the other end is fixedly connected to one end of the hub 11. The other end of the hub 11 extends outward on both sides to form a column structure. The inner ring of the planetary carrier cover 20 is rotatably mounted on the sun gear 27, and the outer ring is rotatably supported on the separation hub 14. The top of the planetary carrier 3 is fixedly connected to the planetary carrier cover 20.

[0041] In another embodiment, the sealing cover and the separation hub are integrated as one unit.

[0042] like Figure 1 , 3 As shown in Figure 4, the two ends of the gear shaft 24 are fixedly connected to the planet carrier cover 20 and the planet carrier 3, respectively, and the planet gears 25 are loosely fitted on the gear shaft 24. The planet gears 25 include two coaxially arranged first gears 25a and second gears 25b. The outer ring of the first gear 25a meshes with the sun gear 27, and the outer ring of the gear ring 12 is fixedly mounted on the inner wall of the hub 11, while the inner ring meshes with the second gear 25b. The rim 8 is located outside the hub 11, and the lower part of the planet carrier 3 is fixedly connected to the rim 8 via spokes 7 and reinforced by a threaded connection to the central nut 4 at the lower part of the planet carrier 3. The vent valve 1 is located in the middle position at the lower part of the planet carrier 3. The pin 2 is located at the bottom of the central nut 4 and passes through the planet carrier 3.

[0043] In another embodiment, the planet carrier and the planet carrier cover are integrally formed.

[0044] In this invention, as a preferred embodiment, the planetary gears 25 are mounted on the gear shaft 24 via needle roller bearings, and there are three planetary gears 25 and three gear shafts 24.

[0045] In another embodiment, the first and second sub-gears of the planetary gear can be separated into two planetary gears of different sizes for easier processing.

[0046] In another embodiment, the planetary gears and the gear shaft are integrated as a single unit.

[0047] In this invention, as a preferred embodiment, the drive motor 19 is an AMK motor.

[0048] like Figure 2 As shown, the sealing cover 17 and the AMK motor 19 are connected by four motor-to-sealing cover connecting bolts 28, and secured with wire to achieve mechanical anti-loosening. The sealing cover 17 and the separation hub 15 are connected by six sealing cover-to-separation hub connecting bolts 30, and six sealing cover-to-separation hub connecting metal anti-loosening nuts 29 are used to prevent the bolts from loosening. At the same time, an installation groove for the O-ring 16 at the connection between the sealing cover and the separation hub is provided on one side of the separation hub 15 to ensure the seal between the sealing cover 17 and the separation hub 15.

[0049] In this utility model, as a preferred embodiment, an M4×10 threaded bolt is selected, an M3×12 bolt is selected for the connection between the sealing cover and the separation hub, and an M3 nut is selected for the metal anti-loosening nut connecting the separation hub.

[0050] The hub 11 and the separate hub 15 are connected by six hub-to-separate hub connecting bolts 31, and six hub-to-separate hub connecting nuts 32 are used to prevent the bolts from loosening. At the same time, an O-ring 14 mounting groove is provided on one side of the hub 11 at the hub-to-separate hub connection to ensure the seal between the hub 11 and the separate hub 15.

[0051] In this utility model, as a preferred embodiment, the connecting bolts between the wheel hub and the separate wheel hub are M6×25 bolts, and the connecting nut 32 between the wheel hub and the separate wheel hub is an M6 nut.

[0052] The inner and outer rings of the deep groove ball bearing 61816 at the separation hub and planetary carrier cover are respectively interference-fitted with the bearing mounting points of the planetary carrier cover-20 and the separation hub-15.

[0053] The input end of the sun gear 27 is designed with a spline that works in conjunction with the output end of the AMK motor 19 to achieve a fixed connection.

[0054] The inner and outer rings of the deep groove ball bearing 26 at the sun gear and planetary carrier cover are interference-fitted with the bearing mounting points of the sun gear 27 and planetary carrier cover 20, respectively. Shoulders on the sun gear 27 and planetary carrier cover 20 are used to secure the bearings and prevent movement.

[0055] In this utility model, as a preferred embodiment, the deep groove ball bearing at the separation hub and planetary carrier cover is a 61816 bearing, and the deep groove ball bearing at the sun gear and planetary carrier cover is a 61803 bearing.

[0056] The needle roller bearings located on one side of the first gear 25a are interference-fitted with the bearing mounting hole of the first gear and the gear shaft, respectively, and one side of the needle roller bearing is in contact with the shim 22. The needle roller bearings located on one side of the second gear are interference-fitted with the planetary gear bearing mounting hole and the gear shaft, respectively, and one side of the needle roller bearing is in contact with the shim 22.

[0057] In this utility model, as a preferred embodiment, the needle roller bearing is a 10×14×10 needle roller bearing.

[0058] The three gear shafts 24 are inserted into the gear shafts of the planet carrier 3 and the planet carrier cover 20 on both sides, respectively. For example... Figure 4 As shown, one end of the planet carrier 3 extends outward to form three extensions 3a, which are used to connect with the planet carrier cover 30. At the same time, a gear shaft 24 connection hole 3b is also provided on the planet carrier 3.

[0059] The gear ring 12 is fixedly connected to the standard rectangular spline inside the hub 11 through a standard rectangular spline, and the retaining ring 13 is fixed by the gear ring to prevent movement.

[0060] The inner and outer rings of the deep groove ball bearing 10 at the hub and planetary carrier are interference-fitted with the bearing mounting points of the planetary carrier 3 and the hub 11, respectively. Meanwhile, a skeleton oil seal 9 is provided on the inner wall of the bearing mounting groove on the right side of the hub 11 to further ensure the seal between the hub 11 and the planetary carrier 3.

[0061] The planetary carrier 3 and the planetary carrier cover 20 are connected by the planetary carrier and planetary carrier cover connecting threaded bolts 18 and are wrapped with iron wire to achieve mechanical anti-loosening.

[0062] In this utility model, as a preferred embodiment, the deep groove ball bearing at the hub and planetary carrier is a 61816 bearing, and the threaded bolt 18 connecting the planetary carrier and the planetary carrier cover is an M6×25 bolt.

[0063] The vent valve 1 is connected via a threaded connection at the center of the planetary carrier 3. The central nut 4 is connected via a threaded connection at the bottom of the planetary carrier 3 and secured with a pin 2, which is wrapped with wire for mechanical anti-loosening. The spokes 7 and rim 8 are connected via hexagonal socket head cap bolts 6, and secured with metal anti-loosening nuts 5 on the spoke-rim connecting flange to prevent loosening. The planetary carrier 3 is connected to the spokes 7 and secured with the central nut 4.

[0064] In this utility model, the hexagonal bolt 6 connecting the spoke 7 and the rim is an M6×30 bolt, and the metal anti-loosening nut 5 connecting the spoke and the rim flange is an M6 nut.

[0065] During operation, the output end of the drive motor 19 is connected to the sun gear 27 of the reducer via a spline connection. When the output end of the drive motor 19 outputs torque to drive the sun gear 27 to rotate, the meshing of the sun gear 27 with the large planetary gear (first sub-gear 25a) causes the large planetary gear and the small planetary gear (second sub-gear 25b) to rotate. Simultaneously, since the small planetary gear meshes with the gear ring 12 mounted on the inner wall of the hub 11, under the action of the rotational driving force, the gear ring 12 will drive the small planetary gear to rotate in the opposite direction to the rotation of the sun 27. The small planetary gear drives the planet carrier 3 to rotate through the gear shaft 24, and the planet carrier 3 then drives the wheel to rotate. The power output by the motor, after passing through the reducer, has a reduced speed and increased torque, and is finally output through the hub.

[0066] 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 system for an electric Formula One race car with a central locking wheel structure, characterized in that, include: Drive motor; The separate hub is coaxially fixed on the end face of the drive motor output end; The hub has one end coaxially fixed on the separate hub, and the other end of the hub extends outward on both sides to form a column structure. The sun gear, whose spline connection is made to the output terminal of the drive motor; The planetary carrier cover has its inner ring rotatably mounted on the sun gear and its outer ring rotatably supported on the separator hub. The planetary carrier has its top fixedly connected to the planetary carrier cover, and its middle part is rotatably supported on the inner wall of the hub. The gear shaft has its two ends fixedly mounted on the planet carrier cover and the planet carrier, respectively. At least three planetary gears are loosely fitted on the gear shaft. The planetary gears include two coaxially arranged first and second sub-gears, and the outer ring of the first sub-gear meshes with the sun gear. The diameter of the first wheel is larger than that of the second wheel; The outer ring of the gear ring is fixedly mounted on the inner wall of the hub, and the inner ring meshes with the outer ring of the second gear. A rim is disposed on the outside of the hub, and the lower part of the planetary carrier is fixedly disposed on the inner wall of the rim.

2. The electric Formula E racing wheel-side system with a central locking wheel structure according to claim 1, characterized in that, Also includes: The spokes are fixed at one end to the lower part of the planetary carrier and at the other end to the inner wall of the rim. A central nut, having an internal thread, is fitted to the external thread located at the lower part of the planetary carrier.

3. The electric Formula E racing wheel-side system with a central locking wheel structure according to claim 2, characterized in that, Also includes: A sealing cap is fixedly mounted on the end face of the output end of the drive motor; The separate hub is fixedly connected to the sealing cover.

4. The electric Formula E racing wheel-side system with a central locking wheel structure according to claim 3, characterized in that, The number of planetary gears is three.

5. The electric Formula E racing wheel-side system with a central locking wheel structure according to claim 4, characterized in that, One end of the planetary carrier extends outward to form three connecting parts, the top of which is fixedly connected to the planetary carrier cover.

6. The electric Formula E racing wheel-side system with a central locking wheel structure according to claim 5, characterized in that, Also includes: The vent valve is located in the lower middle part of the planetary carrier.

7. The electric Formula E racing wheel-side system with a central locking wheel structure according to claim 6, characterized in that, Also includes: A pin, which passes through the planetary carrier and is located at the bottom of the central nut, is used to limit the movement of the central nut.

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