Planet row coupling output dual-motor driving transmission device

Abstract

The invention provides a planet row coupling output dual-motor driving transmission device. The planet row coupling output double-motor driving transmission device comprises motors, a transmission gear set and a planet row which are sequentially connected, the transmission gear set is provided with a gear shifting mechanism, the planet row outputs to a left half shaft and a right half shaft, and the left half shaft and the right half shaft are provided with left half shaft teeth and right half shaft teeth respectively. And a gear ring and a planet carrier of the planet row are respectively meshed with the left half shaft gear and the right half shaft gear. According to the planet row coupling output dual-motor driving transmission device, the problem that an existing transmission device cannot meet the use requirement of an electrically-driven commercial vehicle is solved.

Description

Technical Field

[0001] The present invention relates to the field of transmission devices, and more particularly to a dual-motor drive transmission device with planetary gear set coupled output. Background Art

[0002] The trend of electrification of commercial vehicles is becoming more and more significant, and the penetration rate is getting higher and higher. The power required for commercial vehicles is greater than that of passenger vehicles, and greater torque and power are needed, and even a multi-speed transmission device is required; the electric drive is directly installed on the axle to drive the wheels, and some use a high-power single motor or a low-power dual motor. There are various transmission configuration schemes to achieve multi-speed coupling. At present, electric drive commercial vehicles require the transmission device to have the capabilities of uninterrupted power during gear shifting, neutral gear, direct gear, and single-motor operation, etc., but the existing transmission device products cannot fully meet the above usage requirements. Summary of the Invention

[0003] To solve the problem that the existing transmission device cannot meet the usage requirements of electric drive commercial vehicles, the present invention provides a dual-motor drive transmission device with planetary gear set coupled output to solve the above problems.

[0004] A dual-motor drive transmission device with planetary gear set coupled output includes a motor, a transmission gear set, and a planetary gear set connected in sequence. The transmission gear set is provided with a shifting mechanism. The planetary gear set outputs to the left and right half shafts, and the left and right half shafts are respectively provided with left half shaft teeth and right half shaft teeth. The ring gear and the 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 dual-motor drive transmission device with planetary gear set coupled output 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 arranged on the output shaft. When the shifting mechanism is in the first gear, the output shaft is in transmission connection with the output first gear. When the shifting mechanism is in the second gear, the output shaft is in transmission connection with the output second gear.

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

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

[0008] Compared with the prior art, the dual-motor drive transmission device with planetary gear set coupled output provided by the present invention has the following beneficial effects: 1. The solution provided by the present invention is equipped with two sets of shifting mechanisms, each of which has two gears, providing greater torque and higher speed for the whole vehicle. Since two sets of shifting mechanisms are equipped, when one motor transmission mechanism shifts gears, the other motor transmission mechanism keeps working, thus realizing uninterrupted power and providing better power performance for the whole vehicle.

[0009] 2. In the solution provided by the present invention, the shifting mechanism of each motor drive system can be disengaged to neutral, thus achieving better economy. And when one motor drive system fails, the other motor can still work, having good reliability and redundancy.

[0010] 3. In the solution provided by the present invention, the output planetary gear set integrates the differential function, and the power of the two motors is coupled on the left and right output half shafts, making the load on the transmission path smaller. Both the high-torque and high-speed two gears are three-stage transmissions. It can be used for the drive devices of various vehicle types, especially the electric drive axle of commercial vehicles or the split-type axle electric drive device. Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of the dual-motor drive transmission device with planetary gear set coupled output in Embodiment 1.

[0012] Reference numerals in the figure: motor 1, transmission gear set 2, input shaft 21, input first gear 22, input second gear 23, output shaft 24, output first gear 25, output second gear 26, shifting mechanism 3, first gear 31, second gear 32, shifting 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 Embodiments

[0013] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0014] Embodiment 1: Please refer to Figure 1 , which is a schematic structural diagram of the dual-motor drive transmission device with planetary gear set coupled output in this embodiment.

[0015] The dual-motor drive transmission device with planetary gear set coupling output includes two sets of drive units arranged in parallel. The drive unit includes a motor 1, a transmission gear set 2, a shifting mechanism 3, and a planetary gear set 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 the two drive units, the ring gear of the planetary gear set 4 is connected to the left half shaft gear 53 to output power to the left half shaft 51; in the two drive units, the planet carrier of the planetary gear set 4 is connected to the same right half shaft gear 54 to output 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 provided with the input first gear 22 and the input second gear 23. The output shaft 24 is slidably provided with the output first gear 25 and the output second gear 26. The input first gear 22 meshes with the output first gear 25, and the input second gear 23 meshes with the output second gear 26.

[0019] The shifting mechanism 3 includes a shifting gear 33 fixed to the output shaft 24. When in the first gear 31, the output first gear 25 is connected to the shifting gear 33; when in the second gear 32, the output second 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 the planetary gear set 4 converges towards the output shaft 24. The inner side of the converged position is in sliding contact with the output shaft 24, and the outer side meshes with the right half shaft gear 54. The left half shaft gear 53 is an internal gear ring. The ring gear of the planetary gear set 4 is provided with transmission teeth in the direction away from the output shaft 24, and meshes with the inner side of the left half shaft gear 53 through the transmission teeth to make the transmission directions consistent.

[0021] The above are only embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A dual-motor drive transmission device with planetary gear set coupled output, characterized in that: It includes a motor, a transmission gear set and a planetary gear set connected in sequence. The transmission gear set is provided with a shifting mechanism. The planetary gear set outputs to the left and right half shafts. The left and right half shafts are respectively provided with a left half shaft gear and a right half shaft gear. The ring gear and the planet carrier of the planetary gear set respectively mesh with the left half shaft gear and the right half shaft gear.

2. The planetary gear set coupled output dual-motor drive transmission device according to claim 1, wherein: 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. 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 planetary gear set-coupled output dual-motor drive transmission device according to claim 2, wherein: The output first gear and the output second gear are slidably connected to the output shaft. The shifting mechanism is arranged on the output shaft. When the shifting mechanism is in the first gear, the output shaft is in transmission connection with the output first gear. When the shifting mechanism is in the second gear, the output shaft is in transmission connection with the output second gear.

4. The planetary gear set coupled output dual-motor drive transmission device according to claim 3, wherein: It includes two sets of drive units arranged in parallel. Each drive unit includes the motor, the transmission gear set, the shifting mechanism and the planetary gear set.

5. The planetary gear set-coupled output dual-motor drive transmission device according to any one of claims 1 to 4, characterized in that: The inner side of the planet carrier of the planetary gear set is slidably abutted against the output shaft, and the outer side meshes with the right half shaft gear.

6. The planetary gear set coupled output dual-motor drive transmission device according to claim 5, wherein: The left half shaft gear is an internal gear ring, and the ring gear of the planetary gear set meshes with the inner side of the left half shaft gear.

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