Dual motor drive transmission with planetary row coupled output

Abstract

The application provides a planetary row coupling output double-motor drive transmission device. The planetary row coupling output double-motor drive transmission device comprises a motor, a transmission gear set and a planetary row connected in sequence, the transmission gear set is provided with a gear shifting mechanism, the planetary row is output to left and right half shafts, the left and right half shafts are respectively provided with left half shaft teeth and right half shaft teeth, and the gear ring and the planet carrier of the planetary row are respectively engaged with the left half shaft teeth and the right half shaft teeth. The planetary row coupling output double-motor drive transmission device provided by the application solves the problem that the existing transmission device cannot meet the use requirement of electric drive commercial vehicles.

Description

Technical Field

[0001] This invention relates to the field of transmission devices, and more specifically to a dual-motor drive transmission device with planetary gear set coupling output. Background Technology

[0002] The trend towards electric drive in commercial vehicles is becoming increasingly significant and its penetration rate is rising. Commercial vehicles require more power than passenger vehicles, necessitating higher torque and power outputs, and sometimes even multi-speed transmissions. Electric drives are directly mounted on the axle to drive the wheels, and some use a high-power single motor, while others use a low-power dual motor. Various transmission configurations exist to achieve multi-speed coupling. Currently, electric commercial vehicles require transmissions that can shift gears without interruption of power, allow neutral, direct drive, and single-motor operation. However, existing transmission products cannot fully meet these requirements. Summary of the Invention

[0003] To address the problem that existing transmission devices cannot meet the needs of electric-driven commercial vehicles, this invention provides a dual-motor drive transmission device with planetary gear set coupling output that solves the above-mentioned problem.

[0004] A dual-motor drive transmission device with planetary gear set coupling output includes a motor, a transmission gear set and a planetary gear set connected in sequence. The transmission gear set is equipped with a shifting mechanism. The planetary gear set outputs to the left and right half shafts. The left and right half shafts are respectively equipped with left half shaft teeth and right half shaft teeth. The gear ring and planet carrier of the planetary gear set respectively mesh with the left half shaft teeth and the right half shaft teeth.

[0005] In a preferred embodiment of the planetary gear set coupled output dual-motor drive transmission device provided by the present invention, the transmission gear set includes an input shaft and an output shaft. The input shaft is provided with an input first gear and an input second gear, and the output shaft is provided with an output first gear and an output second gear. The input first gear meshes with the output first gear, and the input second gear meshes with the output second gear. The input shaft is connected to the motor, and the output shaft is connected to the sun gear of the planetary gear set. The output first gear and the output second gear are slidably connected to the output shaft. The shifting mechanism is located on the output shaft. When the shifting mechanism is in first gear, the output shaft is driven by the output first gear; when the shifting mechanism is in second gear, the output shaft is driven by the output second gear.

[0006] In a preferred embodiment of the dual-motor drive transmission device with planetary gearbox coupling output provided by the present invention, two sets of drive units are arranged in parallel. The drive unit includes the motor, the transmission gear set, the shifting mechanism, and the planetary gearbox.

[0007] In a preferred embodiment of the dual-motor drive transmission device with planetary gear set coupling output provided by the present invention, the inner side of the planet carrier of the planetary gear set slides against the output shaft, and the outer side meshes with the right half-shaft gear. The left half-shaft gear is an internal gear ring, and the gear ring of the planetary gear set meshes with the inner side of the left half-shaft gear.

[0008] Compared with existing technologies, the dual-motor drive transmission device with planetary gear set coupling output provided by the present invention has the following advantages: 1. The solution provided by this invention is equipped with two shifting mechanisms, each with two gears, providing the vehicle with greater torque and higher speed. Because of the two shifting mechanisms, when one motor drive mechanism shifts gears, the other motor drive mechanism remains operational, thus ensuring uninterrupted power and providing better power performance for the entire vehicle.

[0009] 2. In the solution provided by this invention, the shifting mechanism of each motor drive system can be disconnected to neutral, thereby achieving better economy. Furthermore, when one motor drive system fails, the other motor can still operate, demonstrating excellent reliability and redundancy.

[0010] 3. In the solution provided by this invention, the output planetary gear set integrates a differential function, and the power of the two motors is coupled on the left and right output half-shafts, resulting in a smaller load on the transmission path. Both the high-torque and high-speed gears are 3-stage transmissions. It can be used in drive systems of various vehicle types, especially electric drive axles for commercial vehicles, or transfer case electric drive systems. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the dual-motor drive transmission device with planetary gear coupling output in Example 1.

[0012] The diagram is labeled as follows: Motor 1, Transmission gear set 2, Input shaft 21, Input first gear gear 22, Input second gear gear 23, Output shaft 24, Output first gear gear 25, Output second gear gear 26, Shift mechanism 3, First gear 31, Second gear 32, Shift gear 33, Planetary gear set 4, Left half shaft 51, Right half shaft 52, Left half shaft gear 53, Right half shaft gear 54. Detailed Implementation

[0013] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0014] Example 1: Please refer to Figure 1 This is a schematic diagram of the dual-motor drive transmission device with planetary gear coupling output in this embodiment.

[0015] The dual-motor drive transmission device with planetary gearbox coupling output includes two sets of drive units in parallel. The drive unit includes a motor 1, a transmission gear set 2, a shifting mechanism 3, and a planetary gearbox 4. The left half-shaft 51 is provided with a left half-shaft gear 53, and the right half-shaft 52 is provided with a right half-shaft gear 54.

[0016] In both drive units, the ring gear of planetary gear set 4 is connected to the left half-shaft gear 53, outputting power to the left half-shaft 51; in both drive units, the planet carrier of planetary gear set 4 is connected to the same right half-shaft gear 54, outputting power to the right half-shaft 52.

[0017] The transmission gear set 2 includes an input shaft 21, an input first gear 22, an input second gear 23, an output shaft 24, an output first gear 25, and an output second gear 26.

[0018] The input shaft 21 is equipped with an input first gear tooth 22 and an input second gear tooth 23. The output shaft 24 is slidably equipped with an output first gear tooth 25 and an output second gear tooth 26. The input first gear tooth 22 engages with the output first gear tooth 25, and the input second gear tooth 23 engages with the output second gear tooth 26.

[0019] The shifting mechanism 3 includes a shifting gear 33 fixed to the output shaft 24. In first gear 31, the output first gear gear 25 is connected to the shifting gear 33; in second gear 32, the output second gear gear 26 is connected to the shifting gear 33. The input shaft 21 is connected to the motor 1, and the output shaft 24 is connected to the sun gear of the planetary gear set 4.

[0020] The planet carrier of planetary gear set 4 retracts towards the output shaft 24, with its inner side sliding against the output shaft 24 and its outer side meshing with the right half-shaft gear 54. The left half-shaft gear 53 is an internal gear ring. The gear ring of planetary gear set 4 has transmission teeth in the direction away from the output shaft 24, which mesh with the inner side of the left half-shaft gear 53 to ensure consistent transmission direction.

[0021] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A dual-motor drive transmission device with planetary gearbox coupling output, characterized in that: The system includes a motor, a transmission gear set, and a planetary gear set connected in sequence. The transmission gear set is equipped with a shifting mechanism. The planetary gear set outputs to the left and right half-shafts, which are respectively equipped with left half-shaft teeth and right half-shaft teeth. The ring gear and planet carrier of the planetary gear set mesh with the left half-shaft teeth and the right half-shaft teeth, respectively. The system also includes two parallel drive units, each of which includes the motor, the transmission gear set, the shifting mechanism, and the planetary gear set. The inner side of the planet carrier of the planetary gear set slides against the output shaft, and the outer side meshes with the right half-shaft teeth. The left half-shaft teeth are internal ring gears, and the ring gear of the planetary gear set meshes with the inner side of the left half-shaft teeth.

2. The dual-motor drive transmission device with planetary gearbox coupling output according to claim 1, characterized in that: The transmission gear set includes an input shaft and an output shaft. The input shaft is provided with an input first gear and an input second gear, and the output shaft is provided with an output first gear and an output second gear. The input first gear meshes with the output first gear, and the input second gear meshes with the output second gear. The input shaft is connected to the motor, and the output shaft is connected to the sun gear of the planetary gear set.

3. The dual-motor drive transmission device with planetary gearbox coupling output according to claim 2, characterized in that: The first output gear and the second output gear are slidably connected to the output shaft. The shifting mechanism is located on the output shaft. When the shifting mechanism is in first gear, the output shaft is driven by the first output gear. When the shifting mechanism is in second gear, the output shaft is driven by the second output gear.

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