Electric drive axle assembly

Abstract

The utility model discloses an electric drive axle assembly, which aims to solve the problems that an existing coaxial electric drive axle is large in structure, and a speed reducer is easy to touch the ground to cause damage, and adopts the technical scheme that the other end of a steering knuckle (10) is in transmission connection with a sun gear on a hub speed reducer (1) through an outer half shaft (11); the other end of the other knuckle (10) is in transmission connection with a sun gear on the other hub reduction gear (1) through the other outer half shaft (11), the reduction gear (5) is a planet gear reduction gear, and a planet carrier (12) on the reduction gear (5) is connected with the differential mechanism (6) through a plurality of bolts.

Description

Technical Field

[0001] This utility model relates to a drive axle, and more particularly to an electric drive axle assembly consisting of a motor, a reducer, a steering knuckle, a differential, a first half-shaft, a second half-shaft, a steering support knuckle, a first axle housing, and a second axle housing. Background Technology

[0002] Chinese patent CN207931484U discloses a coaxial electric drive axle, characterized by the following structure: it includes a motor, a reducer, and an axle tube; the motor includes a housing, a motor shaft and a rotor disposed within the housing; the reducer includes a gear transmission assembly, a differential, a first output shaft, and a second output shaft; the axle tube includes a first axle tube and a second axle tube; the motor shaft and rotor are rigidly connected, the housing is connected to the first and second axle tubes via flanges, one end of the gear transmission assembly is connected to the motor shaft via a spline, the other end of the gear transmission assembly is rigidly connected to the differential, and the differential is connected to the first and second output shafts via splines; the motor shaft is a hollow structure, and the first and second output shafts are respectively inserted through both ends of the hollow motor shaft, and the motor shaft is coaxially arranged with the first and second output shafts, the first axle tube, and the second axle tube. Therefore, after the motor is powered on, the rotor and motor shaft, rigidly connected as a single unit, rotate simultaneously, outputting torque and speed. When the first-stage drive gear rotates, it drives the first-stage driven gear. The second-stage drive gear shaft is rigidly connected to the first-stage driven gear; when the first-stage driven gear rotates, it drives the second-stage drive gear shaft. The second-stage drive gear meshes with the second-stage driven gear; when the second-stage drive gear rotates, it drives the second-stage driven gear. The second-stage driven gear is rigidly connected to the differential, causing the differential to rotate together. Because a two-stage gear transmission is used, with the second-stage drive gear shaft parallel to and below the motor shaft, the structure is relatively bulky, making it prone to the reducer hitting the ground and causing damage. Furthermore, due to the use of a single-stage reduction, it is less suitable for use on engineering vehicles. Summary of the Invention

[0003] The purpose of this invention is to provide an electric drive axle assembly that is smaller in size, less likely to cause the reducer to hit the ground and be damaged, and is also more suitable for use in engineering vehicles.

[0004] To achieve the above objectives, this utility model provides an electric drive axle assembly, comprising a motor, a reducer, a steering knuckle, a differential, a first half-shaft, a second half-shaft, steering support knuckles, a first axle housing, and a second axle housing. The motor's two ends are connected to the first and second axle housings respectively. One end of each of the two steering support knuckles is connected to the motor via the first and second axle housings, forming a single unit. The other ends of the two steering support knuckles are movably connected to the wheel-side reducer via steering knuckles. The differential, housed within the first axle housing, is connected to the motor via the reducer. An internal half-shaft gear on the differential engages with a first half-shaft gear also housed within the first axle housing. One half-shaft is connected to a drive shaft at one end, and the other half-shaft is connected to a steering knuckle at one end. Another inner half-shaft gear on the differential is connected to a second half-shaft at one end, which is located inside the hollow shaft of the motor and the second axle housing. The other half-shaft is connected to another steering knuckle at one end. The other half-shaft of one steering knuckle is connected to a sun gear on a wheel-side reducer via an outer half-shaft. The other half-shaft of the other steering knuckle is connected to a sun gear on another wheel-side reducer via another outer half-shaft. The reducer is a planetary gear reducer, and the planetary gear carrier on the reducer is connected to the differential via multiple bolts.

[0005] The planetary gear carrier is configured in a disc shape, with multiple holes evenly distributed on the disc-shaped planetary gear carrier to facilitate the passage of bolts. A hole is provided in the center of the disc-shaped planetary gear carrier to facilitate the passage of the second half-shaft. A stop is provided on the end face near the differential to cooperate with the differential.

[0006] A flange is provided at one end of the differential housing near the planetary gear carrier to facilitate mating with the planetary gear carrier stop. Multiple bolt holes are evenly distributed on the flange to facilitate bolt tightening.

[0007] The flange is connected to the differential housing as a whole.

[0008] With this structure, one end of the steering knuckle is connected to the sun gear of a wheel-side reducer via an outer half-shaft, and the other end of the steering knuckle is connected to the sun gear of another wheel-side reducer via another outer half-shaft. The reducer is a planetary gear reducer, and the planetary gear carrier on the reducer is connected to the differential via multiple bolts. This eliminates the need for a two-stage gear transmission and uses a two-stage reduction, resulting in a smaller structure, reducing the risk of the reducer hitting the ground and causing damage, and making it more suitable for use in engineering vehicles. Attached Figure Description

[0009] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0010] Appendix Figure 1 This is a schematic cross-sectional view of an electric drive axle assembly according to the present invention.

[0011] Appendix Figure 2 This is a right sectional view of an electric drive axle assembly according to this utility model.

[0012] Appendix Figure 3 It is attached Figure 2 Enlarged schematic diagram of a portion of the K–K section.

[0013] In the diagram: 1. Wheel-side reducer 2. Second half-shaft 3. Second axle housing 4. Motor 5. Reducer 6. Differential 7. First axle housing 8. First half-shaft 9. Steering support knuckle 10. Steering knuckle 11. Outer half-shaft 12. Planetary gear carrier. Detailed Implementation

[0014] Appendix Figure 1 Appendix Figure 2 and attached Figure 3 The present invention discloses an electric drive axle assembly comprising a motor 4, a reducer 5, a steering knuckle 10, a differential 6, a first half-shaft 8, a second half-shaft 2, steering support joints 9, a first axle housing 7, and a second axle housing 3. The motor 4 is connected at both ends to the first axle housing 7 and the second axle housing 3, respectively. One end of each of the two steering support joints 9 is connected to the motor 4 via the first axle housing 7 and the second axle housing 3, forming a single unit. The other ends of the two steering support joints 9 are movably connected to the wheel-side reducer 1 via the steering knuckle 10. The differential 6, located within the first axle housing 7, is connected to the motor 4 via the reducer 5. One internal half-shaft gear on the differential 6 is connected to the first half-shaft gear 2, which is also located within the first axle housing 7. One end of the shaft 8 is connected to the drive, and the other end of the first half-shaft 8 is connected to one end of a steering knuckle 10. Another inner half-shaft gear on a differential 6 is connected to one end of the second half-shaft 2, which is located inside the hollow shaft of the motor 4 and inside the second axle housing 3. The other end of the second half-shaft 2 is connected to one end of another steering knuckle 10. The other end of one steering knuckle 10 is connected to the sun gear on a wheel-side reducer 1 via an outer half-shaft 11. The other end of another steering knuckle 10 is connected to the sun gear on another wheel-side reducer 1 via another outer half-shaft 11. The reducer 5 is a planetary gear reducer, and the planetary gear carrier 12 on the reducer 5 is connected to the differential 6 by multiple bolts.

[0015] Appendix Figure 2 and attached Figure 3 The planetary gear carrier 12 is configured in a disc shape, with multiple holes evenly distributed on the disc-shaped planetary gear carrier 12 to facilitate the passage of bolts. A hole is provided at the center of the disc-shaped planetary gear carrier 12 to facilitate the passage of the second half-shaft 2. A stop is provided on the end face near the differential 6 to cooperate with the differential 6. A flange is provided at the end of the differential 6 housing near the planetary gear carrier 12 to facilitate the cooperation with the stop of the planetary gear carrier 12. Multiple bolt holes are evenly distributed on the flange to facilitate bolt tightening. The flange and the differential 6 housing are connected as a whole.

Claims

1. An electric drive axle assembly, comprising a motor, a reducer, a steering knuckle, a differential, a first half-shaft, a second half-shaft, steering support knuckles, a first axle housing, and a second axle housing, wherein the two ends of the motor are respectively connected to the first axle housing and the second axle housing; one end of each of the two steering support knuckles is connected to the motor as a whole via the first axle housing and the second axle housing, respectively; the other end of each of the two steering support knuckles is movably connected to the wheel-side reducer via the steering knuckle; the differential, disposed within the first axle housing, is driven by the reducer and the motor; one internal half-shaft gear on the differential is driven by one end of the first half-shaft, also disposed within the first axle housing; the other end of the first half-shaft is driven by one end of a steering knuckle; another internal half-shaft gear on the differential is driven by one end of the second half-shaft, disposed within the hollow shaft of the motor and the second axle housing; the other end of the second half-shaft is driven by one end of another steering knuckle, characterized in that: One of the steering knuckles (10) is connected to the sun gear on a wheel-side reducer (1) via an outer half-shaft (11) at the other end, and the other steering knuckle (10) is connected to the sun gear on another wheel-side reducer (1) via another outer half-shaft (11). The reducer (5) is a planetary reducer, and the planetary gear carrier (12) on the reducer (5) is connected to the differential (6) via multiple bolts.

2. The electric drive axle assembly according to claim 1, characterized in that: The planetary gear carrier (12) is set in a disc shape. Multiple holes are evenly distributed on the disc-shaped planetary gear carrier (12) to facilitate the passage of bolts. A hole is provided in the center of the disc-shaped planetary gear carrier (12) to facilitate the passage of the second half-shaft (2). A stop is provided on the end face near the differential (6) to cooperate with the differential (6).

3. The electric drive axle assembly according to claim 1, characterized in that: A flange is provided at one end of the differential (6) housing near the planetary gear carrier (12) to facilitate mating with the stop of the planetary gear carrier (12), and multiple bolt holes are evenly distributed on the flange to facilitate bolt tightening.

4. An electric drive axle assembly according to claim 3, characterized in that: The flange is connected to the differential (6) housing as a whole.

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