Electric barrow racing car speed reducer integrated with transfer case

Abstract

The invention discloses an electric barracing car speed reducer integrated with a transfer case, which relates to the technical field of speed reducers, and comprises a shell assembly, a speed reducing assembly and a transfer assembly, the speed reduction assembly is arranged on the shell assembly; the input end of the speed reduction assembly is used for being in transmission connection with a single motor, the output end of the speed reduction assembly is used for being in transmission connection with a rear axle mechanism, and the speed reduction assembly is used for reducing the power of the single motor and conveying the power to the rear axle mechanism. The transfer assembly is arranged on the shell assembly and is in transmission connection with the speed reduction assembly, the transfer assembly is further used for being in transmission connection with the front shaft mechanism, the speed reduction assembly can further transmit power of the single motor to the transfer assembly, and the transfer assembly can transmit power to the front shaft mechanism. According to the electric barracing car speed reducer integrated with the transfer case, the occupied size, the weight and the cost can be reduced.

Description

Technical Field

[0001] This invention relates to the field of speed reducer technology, and in particular to an electric Baja racing car speed reducer with an integrated transfer case. Background Technology

[0002] As an emerging type of racing car, electric Baja race cars have stringent requirements for the compactness, lightweight design, low cost, reliability under complex operating conditions, and compatibility with the motor.

[0003] However, existing electric Baja racing cars usually have obvious drawbacks: in traditional solutions, the reducer and transfer case are mostly designed separately, resulting in structural redundancy and large size; in order to achieve four-wheel drive, a dual-motor or multi-motor layout is adopted, which greatly increases weight and cost. Summary of the Invention

[0004] The purpose of this invention is to provide an electric Baja racing car reducer with an integrated transfer case to solve the problems existing in the prior art and reduce its volume, weight and cost.

[0005] To achieve the above objectives, the present invention provides the following solution: This invention provides an electric Baja racing car reducer with an integrated transfer case, comprising a housing assembly, a reduction assembly, and a transfer assembly. The reduction assembly is disposed on the housing assembly. The input end of the reduction assembly is used for transmission connection with a single motor, and the output end of the reduction assembly is used for transmission connection with a rear axle mechanism. The reduction assembly is used to reduce the power of the single motor and can transmit it to the rear axle mechanism. The transfer assembly is disposed on the housing assembly and is transmissionally connected to the reduction assembly. The transfer assembly is also used for transmission connection with a front axle mechanism. The reduction assembly can also transmit the power of the single motor to the transfer assembly, and the transfer assembly can transmit power to the front axle mechanism.

[0006] Preferably, the deceleration assembly includes a first set of deceleration mechanisms, a second set of deceleration mechanisms, and a third set of deceleration mechanisms connected in sequence; the input end of the first set of deceleration mechanisms is used for transmission connection with the single motor, the transfer assembly is connected in transmission with the second set of deceleration mechanisms, and the transfer assembly can transmit the power after primary deceleration by the second set of deceleration mechanisms to the front axle mechanism; one output end of the third set of deceleration mechanisms is connected in transmission with the rear axle mechanism, and can transmit the power after secondary deceleration to the rear axle mechanism.

[0007] Preferably, the first set of reduction mechanisms includes an input shaft, which is rotatably and sealed to the housing assembly, and the input end of the input shaft extends out of the housing assembly and is used for transmission connection with the single motor; the input shaft is transmission connected to the second set of reduction mechanisms.

[0008] Preferably, the second set of reduction mechanisms includes an intermediate shaft and an intermediate gear. The intermediate shaft is rotatably and sealed to the housing assembly. An intermediate spline portion is provided on the intermediate shaft, and an input tooth portion is provided on the input shaft. The intermediate shaft is coaxial with and driven by the intermediate gear through the intermediate spline portion. The intermediate gear is meshed with the input tooth portion for transmission. The intermediate shaft is also driven by the third set of reduction mechanisms and the transfer assembly.

[0009] Preferably, the third reduction mechanism includes an output shaft and an output gear. The output shaft is rotatably and sealed to the housing assembly. A connecting spline is provided on the output shaft. The output shaft is coaxial with and driven by the output gear through the connecting spline. The output gear is meshed with an intermediate tooth provided on the intermediate shaft. An output spline is provided at one end of the output shaft extending out of the housing assembly. The output spline is used for drive connection with the rear shaft mechanism.

[0010] Preferably, it further includes a braking assembly, which is disposed on the housing assembly and is connected in drive to the deceleration assembly; the braking assembly is used to brake the deceleration assembly.

[0011] Preferably, the brake assembly includes a brake disc and a brake device. One end of the output shaft, away from the output spline portion, extends out of the housing assembly and is provided with a brake spline portion. The output shaft is coaxial with and driven by the brake disc through the brake spline portion. The brake device is connected to the housing assembly and is used to provide braking force to the brake disc.

[0012] Preferably, the transfer drive assembly includes a transfer shaft, a transfer input bevel gear, and a transfer output bevel gear. The transfer shaft is rotatably and sealed to the housing assembly. The transfer shaft is provided with a first transfer spline portion. The transfer shaft is coaxially and drive-connected to the transfer output bevel gear through the first transfer spline portion. The transfer input bevel gear is coaxially and drive-connected to the intermediate shaft through the intermediate spline portion. The transfer input bevel gear and the transfer output bevel gear are meshed and drive-connected. A second transfer spline portion is provided at one end of the transfer shaft extending out of the housing assembly. The second transfer spline portion is used for drive-connection to the front axle mechanism.

[0013] Preferably, both the input gear and the output gear are provided with weight reduction holes.

[0014] Preferably, the shape of the housing assembly is topologically optimized, and the housing assembly is detachable and has a sealed cavity; the housing assembly is provided with an oil hole communicating with the sealed cavity, and the oil hole can be connected to an external oil pipe for oil injection or drainage.

[0015] The present invention achieves the following technical effects compared to the prior art: The electric Baja racing car reducer with integrated transfer case provided by this invention integrates the transfer case and the reduction case. The reduction case reduces the power of a single motor to increase torque. The output end of the reduction case transmits power to the rear axle mechanism of the racing car. The power of the single motor can also be transmitted to the transfer case through the reduction case, and then to the front axle of the racing car through the transfer case. This realizes the front and rear axle drive of a single motor, which fully matches the high speed and low torque output characteristics of the motor, reduces drive costs, and at the same time reduces the encroachment on the chassis and cockpit of the racing car, reduces space occupation, and reduces the overall vehicle size. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an axle side of an electric Baja racing car reducer with an integrated transfer case provided in Embodiment 1 of the present invention; Figure 2 This is another axle-side schematic diagram of the electric Baja racing car reducer with integrated transfer case provided in Embodiment 1 of the present invention; Figure 3 This is an exploded structural diagram of the electric Baja racing car reducer with integrated transfer case provided in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram showing the disassembled structure of the electric Baja racing car reducer with integrated transfer case provided in Embodiment 1 of the present invention.

[0018] In the diagram: 1-Input shaft; 2-Intermediate gear; 3-Input gear; 4-Transfer input bevel gear; 5-Transfer output bevel gear; 6-Transfer shaft; 7-Transfer case intermediate housing; 8-Intermediate shaft; 9-Intermediate gear; 10-Intermediate spline; 11-Output gear; 12-Output shaft; 13-Connecting spline; 14-Output spline; 15-Brake spline; 16-Left housing; 17-Right housing; 18-Adapter block; 19-Connecting flange; 20-Transfer case outer housing; 21-Brake disc; 22-Brake device; 23-Second transfer spline; 24-First transfer spline; 25-Brake assembly; 26-First reduction mechanism; 27-Second reduction mechanism; 28-Third reduction mechanism; 29-Housing assembly; 30-Transfer assembly; 31-Oil hole. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The purpose of this invention is to provide an electric Baja racing car reducer with an integrated transfer case to solve the problems existing in the prior art and reduce its volume, weight and cost.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1 This embodiment provides an electric Baja racing car reducer with an integrated transfer case. Please refer to [link / reference]. Figures 1-4 The system includes a housing assembly 29, a reduction gear assembly, and a transfer assembly 30. The reduction gear assembly is mounted on the housing assembly 29. The input end of the reduction gear assembly is used for transmission connection with a single motor, and the output end of the reduction gear assembly is used for transmission connection with a rear axle mechanism. The reduction gear assembly is used to reduce the power of the single motor and can transmit it to the rear axle mechanism. The transfer assembly 30 is mounted on the housing assembly 29 and is transmission connected to the reduction gear assembly. The transfer assembly 30 is also used for transmission connection with a front axle mechanism. The reduction gear assembly can also transmit the power of the single motor to the transfer assembly 30, and the transfer assembly 30 can transmit power to the front axle mechanism.

[0023] The transfer drive assembly 30 is integrated with the reduction assembly. The reduction assembly reduces the power of the single motor to increase torque. The output of the reduction assembly transmits power to the rear axle mechanism of the race car. The power of the single motor can also be transmitted to the transfer drive assembly 30 through the reduction assembly, and then power the front axle of the race car through the transfer drive assembly 30. This realizes the front and rear axle drive of a single motor, which fully matches the high speed and low torque output characteristics of the motor, reduces drive costs, and at the same time reduces the encroachment on the chassis and cockpit of the race car, reduces space occupation, and reduces the overall vehicle size.

[0024] In an optional embodiment, more preferably, the deceleration assembly includes a first deceleration mechanism 26, a second deceleration mechanism 27, and a third deceleration mechanism 28 connected in sequence. The input end of the first deceleration mechanism 26 is used to drive a single motor, and the transfer assembly 30 is connected to the second deceleration mechanism 27. The transfer assembly 30 can transmit the power after the first-stage deceleration by the second deceleration mechanism 27 to the front axle mechanism. One output end of the third deceleration mechanism 28 is connected to the rear axle mechanism and can transmit the power after the second-stage deceleration to the rear axle mechanism.

[0025] The first set of reduction mechanisms 26, the second set of reduction mechanisms 27, and the third set of reduction mechanisms 28 are sequentially arranged for transmission. The first set of reduction mechanisms 26 transmits the motor power to the second set of reduction mechanisms 27 for primary reduction. The second set of reduction mechanisms 27 can transmit the power to the third set of reduction mechanisms 28 for secondary reduction. The second set of reduction mechanisms 27 can also transmit the power after primary reduction to the front axle through the transfer assembly 30. The third set of reduction mechanisms 28 transmits the power after secondary reduction to the rear axle mechanism, realizing the power drive of the front and rear axles. The first set of reduction mechanisms 26, the second set of reduction mechanisms 27, and the third set of reduction mechanisms 28 can be arranged in parallel, which is beneficial to achieving high torque carrying capacity, transmission efficiency, rigidity, and stability in a compact space.

[0026] In the optional scheme of this embodiment, more preferably, the first set of reduction mechanism 26 includes an input shaft 1, which is rotatably and sealed to the housing assembly 29. The input end of the input shaft 1 extends out of the housing assembly 29 and is used for transmission connection with a single motor; the input shaft 1 is transmission connected to the second set of reduction mechanism 27.

[0027] The input shaft 1 extends out of the housing assembly 29 at its input end to connect to a single motor power source, such as a motor with a rated power of 10kW and a peak power of 15kW. The input shaft 1 is sealed and rotatably connected to the housing assembly 29. While transmitting power, it avoids the intrusion of mud and sand into the joint in muddy or water-filled working conditions due to poor sealing performance, which could lead to wear failure.

[0028] In the optional scheme of this embodiment, more preferably, the second set of reduction mechanism 27 includes an intermediate shaft 8 and an intermediate gear 2. The intermediate shaft 8 is rotatably and sealed to the housing assembly 29. An intermediate spline portion 10 is provided on the intermediate shaft 8, and an input tooth portion 3 is provided on the input shaft 1. The intermediate shaft 8 is coaxial with the intermediate gear 2 through the intermediate spline portion 10 and is connected for transmission. The intermediate gear 2 is meshed with the input tooth portion 3 for transmission. The intermediate shaft 8 is also connected for transmission to the third set of reduction mechanism 28 and the transfer assembly 30.

[0029] The intermediate gear 2 meshes with the input gear 3 of the input shaft 1 to achieve a first-stage reduction. It also connects with the intermediate spline 10 of the intermediate shaft 8 to achieve a transmission engagement with the intermediate shaft 8, so that power can be transmitted through the intermediate shaft 8 to the three sets of reduction mechanisms and the transfer assembly 30, thereby splitting the power of the front axle and the rear axle. In addition, the intermediate shaft 8 is sealed and rotatably connected to the housing assembly 29. While transmitting power, it avoids the intrusion of mud and sand into the joint area due to poor sealing performance in muddy or water-crossing conditions, which could cause wear failure.

[0030] In the optional scheme of this embodiment, more preferably, the third set of reduction mechanism 28 includes an output shaft 12 and an output gear 11. The output shaft 12 is rotatably and sealed to the housing assembly 29. A connecting spline portion 13 is provided on the output shaft 12. The output shaft 12 is coaxial with the output gear 11 and is connected for transmission through the connecting spline portion 13. The output gear 11 is meshed with the intermediate tooth portion 9 provided on the intermediate shaft 8 for transmission. An output spline portion 14 is provided at one end of the output shaft 12 that extends out of the housing assembly 29. The output spline portion 14 is used for transmission connection with the rear shaft mechanism.

[0031] The output gear 11 meshes with the intermediate tooth 9 of the intermediate shaft 8 to achieve secondary reduction of the motor power. It also transmits power to the output shaft 12 through the connection spline 13. The output shaft 12 transmits power to the rear shaft mechanism through the output spline 14. In addition, the output shaft 12 is sealed and rotatably connected to the housing assembly 29. While transmitting power, it avoids the intrusion of mud and sand into the joint area due to poor sealing performance in muddy or water-crossing conditions, which could cause wear failure.

[0032] More preferably, the output shaft 12 can be made of TC4 titanium alloy, which ensures strength while reducing weight.

[0033] In the optional solutions of this embodiment, more preferably, the electric Baja racing car reducer with integrated transfer case provided in this embodiment also includes a brake assembly 25. The brake assembly 25 is disposed on the housing assembly 29 and is connected to the reduction assembly in a transmission manner; the brake assembly 25 is used to brake the reduction assembly.

[0034] By integrating the brake assembly 25 into the reducer, space is saved while achieving the braking function of the vehicle.

[0035] In the optional embodiments of this example, more preferably, the brake assembly 25 includes a brake disc 21 and a brake device 22. One end of the output shaft 12, which is away from the output spline portion 14, extends out of the housing assembly 29 and is provided with a brake spline portion 15. The output shaft 12 is coaxial with the brake disc 21 and is connected to it through the brake spline portion 15. The brake device 22 is connected to the housing assembly 29 and is used to provide braking force to the brake disc 21.

[0036] The brake disc 21 is located outside the housing assembly 29. The brake spline portion 15 at one end of the output shaft 12 is connected to the brake disc 21 through a connecting flange 19 in the middle of the brake disc 21. The connecting flange 19 is fixedly connected to the brake disc 21 by bolts. The braking device 22 is fixedly connected to the housing assembly 29 through an adapter block 18 and bolts, and provides braking force to the brake disc 21 when braking is required. The braking device 22 can adopt a conventional piston braking system. The brake disc 21 and the braking device 22 work together to brake the output shaft 12. The structure is simple and inexpensive while ensuring braking effect.

[0037] In the optional embodiment, more preferably, the transfer assembly 30 includes a transfer shaft 6, a transfer input bevel gear 4, and a transfer output bevel gear 5. The transfer shaft 6 is rotatably and sealed to the housing assembly 29. A first transfer spline portion 24 is provided on the transfer shaft 6. The transfer shaft 6 is coaxially and drive-connected to the transfer output bevel gear 5 through the first transfer spline portion 24. The transfer input bevel gear 4 is coaxially and drive-connected to the intermediate shaft 8 through the intermediate spline portion 10. The transfer input bevel gear 4 and the transfer output bevel gear 5 are meshed and drive-connected. A second transfer spline portion 23 is provided at one end of the transfer shaft 6 extending out of the housing assembly 29. The second transfer spline portion 23 is used for drive-connection with the front axle mechanism.

[0038] The power of the transfer shaft 6 comes from the transmission engagement between the transfer input bevel gear 4 and the intermediate spline portion 10 of the intermediate shaft 8. The transfer input bevel gear 4 transmits power to the transfer output bevel gear 5. The transfer output bevel gear 5 transmits power to the transfer shaft 6 through a transmission connection with the first transfer spline portion 24 (e.g., a rectangular spline portion), and through a transmission connection with the front axle mechanism via the second transfer spline portion 23 (e.g., a rectangular spline portion), thus realizing the transmission of power to the front axle mechanism. The engagement of the transfer input bevel gear 4 and the transfer output bevel gear 5 facilitates a more compact spatial layout and reduces space requirements. The transfer shaft 6 rotates and is sealed to the housing assembly 29, which, while transmitting power, prevents mud and sand from easily invading the joint area and causing wear failures due to poor sealing performance in muddy or water-filled working conditions.

[0039] In the optional scheme of this embodiment, more preferably, both the intermediate gear 2 and the output gear 11 are provided with weight reduction holes.

[0040] The weight-reducing holes should be evenly distributed to reduce the moment of inertia of the gears at high speeds while ensuring the strength of the gears, and at the same time reduce the overall weight of the reducer.

[0041] In the optional embodiments of this example, the shape of the housing assembly 29 is topologically optimized, and the housing assembly 29 is detachable and has a sealed cavity; the housing assembly 29 is provided with an oil hole 31 that communicates with the sealed cavity, and the oil hole 31 can be connected to an external oil pipe for oil injection or drainage.

[0042] Among them, the shape of the housing component 29 was optimized through conventional topology optimization, changing the traditional "box" shape and reducing the overall volume while ensuring sufficient strength; moreover, the reducer is lubricated with gear lubricating oil, which is added through the oil hole 31 on the upper part of the housing component 29; the oil hole 31 has a threaded design and can be connected to the oil bolt connected to the oil pipe, so as to discharge the oil that overflows due to heat generation after long-term operation.

[0043] In a preferred embodiment, the housing assembly 29 comprises a left housing 16, a right housing 17, a transfer case intermediate housing 7, and a transfer case outer housing 20. The left housing 16 and the right housing 17 are connected by bolts, and the transfer case intermediate housing 7 and the transfer case outer housing are connected to the left housing 16 and / or the right housing 17 by bolts. Each connection seam is sealed with sealant to form a sealed cavity. The reduction gear assembly is integrated inside the left housing 16 and the right housing 17, and the transfer case assembly 30 is integrated inside the transfer case intermediate housing 7 and the transfer case outer housing 20. The gaps between the portions of the reduction gear assembly and the transfer case assembly 30 extending out of the housing assembly 29 are sealed with oil seals. Furthermore, each shaft component of the reduction gear assembly and the transfer case assembly 30 is rotatably connected to the housing assembly 29 via bearings.

[0044] The operating logic of the electric Baja racing car reducer with integrated transfer case provided in this embodiment is as follows: Deceleration process: The power system is transmitted through the input shaft 1, and the first stage of deceleration is performed by the input gear 3 meshing with the intermediate gear 2; the intermediate gear 9 is connected to the output gear 11 and performs the second stage of deceleration, and the power is transmitted to the outside of the housing assembly 29 by the output spline 14 and the brake spline 15 at the end of the output shaft 12.

[0045] Transfer process: The intermediate shaft 8 transmits the power after the first stage of reduction to the transfer input bevel gear 4 through the spline section of the intermediate shaft 8. The transfer input bevel gear 4 meshes with the transfer output bevel gear 5 located on the transfer shaft 6 to transmit the power after the first stage of reduction to the transfer shaft 6 through the transfer output bevel gear 5, and then to the outside.

[0046] Braking logic: The output shaft 12 is braked by a brake disc 21 that is connected to the output shaft 12 and a brake device 22 that is connected to the housing assembly 29.

[0047] Thus, the electric Baja racing car reducer with integrated transfer case realizes the functions of deceleration, transfer (distributing power to the front axle) and braking of the power source (a 15kW peak power electric motor).

[0048] Moreover, the electric Baja racing car gearbox design with integrated transfer case significantly improves the car's compactness, lightweight, low cost, and reliability under complex operating conditions, and the design can also be well matched with the motor.

[0049] In terms of compactness, the space occupied and the overall vehicle volume are reduced by optimizing the topology of the housing component 29, integrating the transfer component 30 into the reduction component and the single motor layout.

[0050] In terms of weight reduction, the overall vehicle weight is reduced by using a single motor instead of dual motors, reducing the weight of intermediate gear 2 and output gear 11, and using TC4 titanium alloy for output shaft 12, all while maintaining the same power output.

[0051] In terms of low cost, the use of a single motor and a simplified brake assembly 25 significantly reduces costs.

[0052] In terms of reliability, the spline-based transmission connection method changes the traditional bolted or key-and-keyway connection method, reducing fatigue and fracture caused by large shear forces in a single location in bolted or keyed connections. It also reduces disassembly and assembly time, reduces the risk of motor failure and fatigue fracture, and improves the overall reliability of the vehicle.

[0053] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An electric Baja racing car reducer with an integrated transfer case, characterized in that: include: Housing assembly; A reduction gear assembly is disposed on the housing assembly; the input end of the reduction gear assembly is used for transmission connection with a single motor, and the output end of the reduction gear assembly is used for transmission connection with a rear axle mechanism; the reduction gear assembly is used to reduce the power of the single motor and can transmit it to the rear axle mechanism; and The transfer assembly is disposed on the housing assembly and is connected to the reduction assembly in a transmission manner. The transfer assembly is also used to be connected to the front axle mechanism in a transmission manner. The reduction assembly can also transmit the power of the single motor to the transfer assembly, and the transfer assembly can transmit power to the front axle mechanism.

2. The electric Baja racing car reducer with integrated transfer case according to claim 1, characterized in that: The deceleration assembly includes a first set of deceleration mechanisms, a second set of deceleration mechanisms, and a third set of deceleration mechanisms connected in sequence. The input end of the first set of deceleration mechanisms is used for transmission connection with the single motor. The transfer assembly is connected in transmission with the second set of deceleration mechanisms. The transfer assembly can transmit the power after the first stage of deceleration by the second set of deceleration mechanisms to the front axle mechanism. One output end of the third set of deceleration mechanisms is connected in transmission with the rear axle mechanism and can transmit the power after the second stage of deceleration to the rear axle mechanism.

3. The electric Baja racing car reducer with integrated transfer case according to claim 2, characterized in that: The first set of reduction mechanisms includes an input shaft, which is rotatably and sealed to the housing assembly. The input end of the input shaft extends out of the housing assembly and is used for transmission connection with the single motor. The input shaft is also transmissionally connected to the second set of reduction mechanisms.

4. The electric Baja racing car reducer with integrated transfer case according to claim 3, characterized in that: The second set of reduction mechanisms includes an intermediate shaft and an intermediate gear. The intermediate shaft is rotatably and sealed to the housing assembly. An intermediate spline portion is provided on the intermediate shaft, and an input gear portion is provided on the input shaft. The intermediate shaft is coaxial with and driven by the intermediate gear through the intermediate spline portion. The intermediate gear is meshed with the input gear portion for transmission. The intermediate shaft is also driven by the third set of reduction mechanisms and the transfer assembly.

5. The electric Baja racing car reducer with integrated transfer case according to claim 4, characterized in that: The third reduction mechanism includes an output shaft and an output gear. The output shaft is rotatably and sealed to the housing assembly. A connecting spline is provided on the output shaft. The output shaft is coaxial with and driven by the output gear through the connecting spline. The output gear is meshed with an intermediate tooth provided on the intermediate shaft. An output spline is provided at one end of the output shaft extending out of the housing assembly. The output spline is used for drive connection with the rear shaft mechanism.

6. The electric Baja racing car reducer with integrated transfer case according to claim 5, characterized in that: It also includes a braking assembly, which is disposed on the housing assembly and is connected in drive to the deceleration assembly; the braking assembly is used to brake the deceleration assembly.

7. The electric Baja racing car reducer with integrated transfer case according to claim 6, characterized in that: The brake assembly includes a brake disc and a brake device. One end of the output shaft, away from the output spline portion, extends out of the housing assembly and is provided with a brake spline portion. The output shaft is coaxial with and driven by the brake disc through the brake spline portion. The brake device is connected to the housing assembly and is used to provide braking force to the brake disc.

8. The electric Baja racing car reducer with integrated transfer case according to claim 4, characterized in that: The transfer drive assembly includes a transfer shaft, a transfer input bevel gear, and a transfer output bevel gear. The transfer shaft is rotatably and sealed to the housing assembly. The transfer shaft is provided with a first transfer spline portion. The transfer shaft is coaxially and drive-connected to the transfer output bevel gear through the first transfer spline portion. The transfer input bevel gear is coaxially and drive-connected to the intermediate shaft through the intermediate spline portion. The transfer input bevel gear and the transfer output bevel gear are meshed and drive-connected. A second transfer spline portion is provided at one end of the transfer shaft extending out of the housing assembly. The second transfer spline portion is used for drive-connection to the front axle mechanism.

9. The electric Baja racing car reducer with integrated transfer case according to claim 5, characterized in that: Both the intermediate gear and the output gear are provided with weight reduction holes.

10. The electric Baja racing car reducer with integrated transfer case according to any one of claims 1-9, characterized in that: The shape of the housing assembly is topologically optimized, and the housing assembly is detachable and has a sealed cavity; the housing assembly is provided with an oil hole that communicates with the sealed cavity, and the oil hole can be connected to an external oil pipe for oil injection or drainage.

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