A high-power special vehicle electric drive axle housing

Abstract

The utility model belongs to special vehicle technical field discloses a kind of electric drive axle housing of high-power special vehicle, the shell is integrated structure;Left side, middle part, right upper side, right lower side in shell interior are provided with reduction gear cavity, wheel differential cavity, locking mechanism cavity, output mechanism cavity, the most right end of shell is provided with a "8" type cavity.The utility model's technical scheme is integrated by design, and differential and its locking mechanism, reduction gear, input and output mechanism and so on multiple functions are integrated, simplify structure, improve the overall performance and reliability of transmission system, while optimizing oil management, sensor installation and the connection function with motor, meet the requirement of high-power special vehicle to transmission system high efficiency, compact, reliable.

Description

Technical Field

[0001] This utility model belongs to the field of special vehicle technology, specifically relating to an electric drive axle housing for a high-power special vehicle. Background Technology

[0002] In the field of special vehicles, the electric drive axle is a core component for vehicle power transmission, and its housing design directly affects the performance, reliability, and ease of maintenance of the transmission system. Traditional electric drive axle housings typically adopt a split structure, requiring multiple independent components to achieve different functions, such as differentials, reducers, and input / output mechanisms. This design uses multiple housings or mounting brackets to fix each component separately, and then achieves the overall transmission function through a complex connection structure.

[0003] Traditional drive axle housings have the following drawbacks: ① Traditional drive axle housings use a split design, resulting in a large number of parts, increased assembly difficulty, and higher production costs and assembly time. ② The combination of multiple independent components leads to an increased overall size of the transmission system, making it difficult to meet the compact space requirements of special vehicles. The split structure has many connection points, which can easily lead to loosening or poor sealing, reducing system reliability. ③ Traditional housings have dispersed functions in areas such as oil management, sensor installation, and connection with the motor, lacking integrated design and resulting in inconvenient maintenance. ④ Traditional housings are mostly made of ordinary steel, which has poor heat dissipation performance and is prone to corrosion in harsh environments, affecting service life. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The technical problem to be solved by this utility model is that the traditional drive axle housing adopts a split design, which is complex in structure, difficult to assemble, has low reliability and is inconvenient to maintain.

[0006] (II) Technical Solution

[0007] To solve the above-mentioned technical problems, this utility model provides an electric drive axle housing for high-power special vehicles. The housing is an integral structure. The left side, middle side, upper right side, and lower right side of the housing are respectively provided with a reducer cavity, an inter-wheel differential cavity, a locking mechanism cavity, and an output mechanism cavity. The rightmost end of the housing is provided with an "8"-shaped cavity.

[0008] The locking mechanism cavity is located at the upper part of the figure-eight shaped cavity on the right side of the housing, and is used to house the differential locking mechanism; the output mechanism cavity is located at the lower part of the figure-eight shaped cavity on the right side of the housing, and is used to house the drive shaft, connecting plate, bearing, and oil seal.

[0009] The reducer cavity is provided with a rectangular keyway for fixing the planetary gear ring to torque transmission, which is used to fix the planetary gear ring of the reducer.

[0010] The inner wall of the housing is designed with multiple annular and longitudinal oil guide grooves to guide lubricating oil to various parts that need lubrication; the bottom of the housing is provided with a U-shaped small oil pan and two oil drain ports, and the upper right side of the housing is provided with an oil filler port. The oil drain port and the oil filler port are provided with threaded oil drain plugs; a vent is installed inside the oil filler port with waterproof and breathable membrane material.

[0011] The housing has internal partitions and multiple bearing housing mounting holes to provide support for the differential and bearings;

[0012] The housing has an oil level check overflow port on the side and a sensor mounting interface on the top. The right end of the housing has multiple right mounting holes for fixing the housing to the vehicle body elastic support sleeve. The left end of the housing has multiple left mounting holes and positioning holes for fixing to the motor.

[0013] The shell is integrally formed by an extrusion process.

[0014] The housing is made of 7075 high-strength aluminum alloy.

[0015] The dimensions of the rectangular keyway are matched with the keyway dimensions of the planetary gear ring using an inner diameter centering match, and the key width uses a clearance fit.

[0016] The sensor mounting interface is a circular protrusion with threaded holes inside, and the sensor is mounted on this interface by bolts.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model has the following beneficial effects: through integrated design, the differential and its locking mechanism, reducer, input and output mechanism and other functions are integrated into one, simplifying the structure, improving the overall performance and reliability of the transmission system, and optimizing functions such as oil management, sensor installation and connection with the motor, so as to meet the requirements of high-power special vehicles for efficient, compact and reliable transmission systems. Attached Figure Description

[0019] Figure 1 This is a three-dimensional sectional view of the shell.

[0020] Figure 2 This is a drawing of the shell's outer shape;

[0021] Figure 3 This is a three-dimensional sectional view of the shell.

[0022] Figure 4 This is a drawing of the shell's outer shape;

[0023] Figure 5 This is a schematic diagram of the end face of the shell. Detailed Implementation

[0024] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0025] like Figures 1-5 As shown, the electric drive axle housing in this embodiment is an integral structure made of high-strength aluminum alloy and integrally formed through precision casting. The interior of the housing is optimized with a reasonable spatial layout, capable of accommodating the differential and its locking mechanism, reducer, input mechanism, and output mechanism. The housing also integrates multiple functional interfaces, enabling efficient, compact, and reliable operation of the transmission system.

[0026] The electric drive axle housing 1 of this utility model is an integral structure, made of high-strength aluminum alloy material, and integrally formed through a precision extrusion process. The interior of the housing is optimized with a reasonable spatial layout, including a reducer cavity 2, an inter-wheel differential cavity 3, a locking mechanism cavity 4, and an output mechanism cavity 5, located on the left, middle, upper right, and lower right sides of the housing, respectively. These cavity can accommodate the reducer, differential, locking gear sleeve and locking mechanism, and output mechanism. An "8"-shaped cavity is provided at the far right end of the housing.

[0027] The locking mechanism cavity 4 is located on the upper part of the figure-eight shaped cavity on the right side of the housing, and is used to house the differential locking mechanism (including cylinders, differential shifters, springs, and other components); the output mechanism cavity 5 is located on the lower part of the figure-eight shaped cavity on the right side of the housing, and is used to house the drive shaft, connecting plate, bearings, oil seals, and other components. This layout ensures that the differential can be quickly locked or unlocked when needed, transmitting power to the output device with the shortest transmission chain, and improving the vehicle's passability in complex road conditions.

[0028] The reducer cavity 2 is equipped with a rectangular keyway 6 for fixing the planetary gear ring to torque transmission. The dimensions of the rectangular keyway are matched to the keyway dimensions of the planetary gear ring using an inner diameter centering fit, and the key width uses a clearance fit. This satisfies the load-sharing requirements of the planetary gear ring, ensuring the stability of the planetary gear ring when transmitting torque and improving the efficiency and reliability of the transmission system. This structural design optimizes the power transmission path and reduces energy loss.

[0029] The inner wall of the housing is designed with multiple annular and longitudinal oil guide grooves 7 to guide lubricating oil to various critical parts, such as bearings and gears. The layout of the oil guide grooves ensures that the lubricating oil is evenly distributed, reducing oil agitation losses and improving lubrication performance. The bottom of the housing has a U-shaped oil pan 16 and two oil drain ports 8, sealed by two threaded drain plugs for easy lubricating oil drainage. A filler port 9 is located on the upper right side of the housing; this filler port also functions as a vent, sealed by a threaded filler plug for easy lubricating oil replenishment. A vent with a waterproof and breathable membrane material is installed inside the filler port to balance the air pressure inside and outside the housing, preventing lubricating oil leakage or external dust from entering the housing due to pressure differences.

[0030] The housing contains a partition wall 10 and multiple bearing housing mounting holes 19. These holes not only secure the bearing housings and support the differential assembly, but also, through the interface 11 with the locking mechanism cavity 4, limit the movement of the springs and pistons in the locking mechanism. The partition wall design not only enhances the structural strength of the housing but also provides stable support for the differential and bearings, ensuring the efficient operation of the transmission system.

[0031] The side of the housing is also designed with an oil level check overflow port 12, which serves the dual functions of oil level check and overflow. Users can visually check the lubricating oil level to ensure that the lubricating oil quantity is within the appropriate range. When the lubricating oil level is too high, the excess oil will be discharged through the overflow port.

[0032] The top of the housing features a sensor mounting interface 17, which is a circular protrusion with threaded holes inside. This interface serves both as a sensor mounting point and an observation port. The sensor is bolted to this interface, enabling real-time monitoring of its internal operating status and transmitting signals to the vehicle control system.

[0033] The right end of the housing has multiple right mounting holes 13 for fixing the housing to the vehicle body elastic support sleeve. The position and number of mounting holes are optimized based on vehicle testing to ensure stable fixation of the housing. The left end of the housing has multiple left mounting holes 14 and positioning holes 18 for fixing to the motor.

[0034] The housing is made of 7075 high-strength aluminum alloy and integrally formed through extrusion molding. After T6 treatment, the tensile strength reaches 540-570MPa, the yield strength is 480-505MPa, and the elongation is 10%. At the same time, it adopts a surface anodizing process, which has the characteristics of light weight, high strength, corrosion resistance, and good heat dissipation performance, and can meet the requirements of high-power special vehicles for lightweight and efficient heat dissipation of the transmission system.

[0035] This embodiment provides an integrated housing for the electric drive axle of a high-power special vehicle. Through integrated design and multi-functional integration, it simplifies the structure, improves performance, and enhances maintenance convenience of the electric drive system. The optimized internal design of the housing, along with the partition walls and oil passages, ensures the efficient operation and stability of the electric drive system. The design of various functional interfaces, such as sensor mounting interfaces, oil level check overflow ports, drain ports, filler ports, breather ports, the rectangular key for fixing the planetary gear ring torsion transmission, the interface with the motor end cover, and the interface for installing oil seals, not only optimizes the system's functionality but also improves maintenance convenience and reliability. Through this integrated design, the electric drive axle housing of this invention meets the requirements of high-power special vehicles for efficient, compact, and reliable transmission systems while achieving the goals of lightweight and high performance, demonstrating broad application prospects.

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An electric drive axle housing for a high-power special vehicle, characterized in that, The housing is an integral structure; inside the housing, the left side, middle, upper right side, and lower right side are respectively provided with a reducer cavity, an inter-wheel differential cavity, a locking mechanism cavity, and an output mechanism cavity, and the rightmost end of the housing is provided with an "8"-shaped cavity; The locking mechanism cavity is located at the upper part of the figure-eight-shaped cavity on the right side of the housing, and is used to house the differential locking mechanism; the output mechanism cavity is located at the lower part of the figure-eight-shaped cavity on the right side of the housing, and is used to house the drive shaft, connecting plate, bearing, and oil seal. The reducer cavity is provided with a rectangular keyway for fixing the planetary gear ring to torque transmission, which is used to fix the planetary gear ring of the reducer. The inner wall of the housing is designed with multiple annular and longitudinal oil guide grooves to guide lubricating oil to various parts that need lubrication; the bottom of the housing is provided with a U-shaped small oil pan and two oil drain ports, and the upper right side of the housing is provided with an oil filler port. The oil drain port and the oil filler port are provided with threaded oil drain plugs; a vent is installed inside the oil filler port with waterproof and breathable membrane material. The housing has internal partitions and multiple bearing housing mounting holes to provide support for the differential and bearings; The housing has an oil level check overflow port on the side and a sensor mounting interface on the top. The right end of the housing has multiple right mounting holes for fixing the housing to the vehicle body elastic support sleeve. The left end of the housing has multiple left mounting holes and positioning holes for fixing to the motor.

2. The electric drive axle housing for high-power special vehicles as described in claim 1, characterized in that, The shell is integrally formed by an extrusion process.

3. The electric drive axle housing for high-power special vehicles as described in claim 2, characterized in that, The shell is made of 7075 high-strength aluminum alloy.

4. The electric drive axle housing for high-power special vehicles as described in claim 1, characterized in that, The dimensions of the rectangular keyway are matched with the keyway dimensions of the planetary gear ring using inner diameter centering, and the key width uses clearance fit.

5. The electric drive axle housing for high-power special vehicles as described in claim 1, characterized in that, The sensor mounting interface is a circular protrusion with threaded holes inside. The sensor is mounted on this interface with bolts.

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