Dual-motor driving assembly system

Abstract

The utility model relates to a dual-motor drive assembly system which comprises a power output source, and an input unit is arranged opposite to the power output source so as to be connected with a speed reduction unit. The speed reduction unit transmits the torque to the low-speed driving gear; a first compound gear shaft is arranged at the output end of the low-speed driving gear, the first compound gear shaft and the low-speed driving gear are in meshing transmission with a second compound gear shaft, the second compound gear shaft comprises two gears different in modulus, and the output shaft gear is arranged at the output end of the second compound gear shaft. And the output shaft gear is meshed with the pinion of the first compound gear shaft to finish torque output so as to meet the requirements of the whole vehicle. By using the two intermediate shafts, the gearbox can more effectively distribute power from different motors, energy loss is reduced, and transmission efficiency is improved. And due to the multi-gear design, the mine car can keep the optimal performance under different loads and speeds.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor drive technical field, more specifically, it relates to a double motor drive assembly system and gear adjustment method thereof. BACKGROUND

[0002] The central electric drive assembly is the core part of the new energy heavy truck power system, and its performance directly affects the overall efficiency and operating cost of the vehicle. The central electric drive assembly is a power assembly integrating the driving motor and the gearbox, replacing the traditional engine and gearbox, but still needs a transmission shaft and a traditional axle. In terms of arrangement form, the central electric drive assembly is similar to the traditional automobile power assembly. However, its transmission route is long, energy loss is large, system efficiency is low, and a large amount of space is occupied at the bottom.

[0003] After searching, 202011302871.0 discloses a parallel shaft type double motor torque vector control system, method, power assembly and vehicle. The system includes a first reduction unit that transmits the output torque of the first motor to the first wheel mechanism, a second reduction unit that transmits the output torque of the second motor to the second wheel mechanism, a clutch unit that controls the disengagement of the two motor output shafts, a clutch unit that controls the disengagement of the first motor and the first reduction unit, a clutch unit that controls the disengagement of the second motor and the second reduction unit, and a control unit that controls the switching state and transmission power of the three clutch units. The method includes the steps of controlling the switching state and transmission power of the three clutch units according to the torque vector distribution instruction. The power assembly includes the above-mentioned system, and the vehicle includes the power assembly. It can solve the problem of low motor operating efficiency caused by the inability of the four-wheel drive power free control system to realize single motor driving.

[0004] Although the mainstream integrated electric drive axle scheme in the current market has advantages in transmission efficiency and smoothness, there is still room for improvement under certain working conditions. Therefore, developing a high-efficiency and reliable central electric drive assembly has become an urgent need for the development of the industry. UTILITY MODEL CONTENTS

[0005] The utility model provides a double motor drive assembly system in view of the deficiency of prior art, through using two intermediate shafts, the gearbox can more effectively distribute power from different motors, reduce energy loss, and improve transmission efficiency. The multi-gear design enables the mine car to maintain optimal performance under different loads and speeds.

[0006] The above-mentioned purpose of the utility model is realized by the following technical solutions:

[0007] Disclose a double motor drive assembly system, including power output source, relative arrangement has input unit to connect reduction unit to the power output source;The reduction unit transmits torque to low speed driving gear;The output end of low speed driving gear is provided with first composite gear shaft, the first composite gear shaft and low speed driving gear are respectively engaged with second composite gear shaft transmission;The second composite gear shaft includes two different modulus gears, the output shaft gear is arranged at the output end of the second composite gear shaft, and the output shaft gear is engaged with the pinion of the first composite gear shaft, and the torque output is completed to meet the demand of the whole vehicle.

[0008] The double motor drive assembly system of the utility model sets up the power output source as double motor, and the design of double motor and double intermediate shaft jointly acts, improves the overall efficiency of the gearbox, and reduces energy waste.Compact structure design helps to reduce material use, thereby reducing overall weight, which is crucial for improving the fuel economy and performance of the mine car.

[0009] Further, the power output source includes oppositely arranged motor one and motor two, and the motor one and the motor two are connected with the output shaft one and the output shaft two through the spline respectively;The output shaft one and the output shaft two are engaged with the constant mesh gear one and the constant mesh gear two respectively.

[0010] Further, the constant mesh gear one and the constant mesh gear two are fixedly connected with the intermediate shaft one and the intermediate shaft two respectively.

[0011] Further, the intermediate shaft one and the intermediate shaft two are provided with toothed sleeves combined with the low speed driving gear one and the low speed driving gear two.

[0012] Further, the first composite gear shaft includes composite driving teeth one and composite driving teeth two, and the side away from the low speed driving gear one and the low speed driving gear two of the toothed sleeve is provided with the composite driving teeth one and the composite driving teeth two.

[0013] Further, the second composite gear shaft adopts double gear process, including low speed driven gear and high speed driven gear.

[0014] Further, the low speed driven gear is engaged with the low speed driving gear, and the high speed driven gear is engaged with the first composite gear shaft.

[0015] Further, the second composite gear shaft adopts a suspension structure design, supported by the low speed driving teeth on both sides and the first composite gear shaft, and the rotational speed of the output shaft is inconsistent.

[0016] Another purpose of the utility model lies in the gear adjustment method of the above-mentioned double motor drive assembly system, the power output source transmits power to the input shaft one through spline connection, the constant meshing gear one is fixedly connected with the intermediate shaft one, when the toothed sleeve is combined with the low speed driving gear one, the torque is transmitted to the low speed driving gear one from the intermediate shaft one, and is transmitted to the second compound gear shaft from the low speed driving gear and the first compound gear shaft support on both sides, and the rotating speed of the output shaft is inconsistent.

[0017] Another purpose of the utility model lies in the gear adjustment method of the above-mentioned double motor drive assembly system, when the toothed sleeve is hung into the compound gear shaft one, the torque is transmitted to the constant meshing gear one from the input shaft one, the torque of the intermediate shaft one is transmitted to the compound gear shaft one, and the torque is transmitted to the output shaft from the compound gear shaft one, so that the transmission route completes two-stage speed reduction.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model discloses a double motor drive assembly system, power from different motors can be more effectively distributed by using two intermediate shafts, energy loss is reduced, and transmission efficiency is improved.

[0020] The utility model discloses a double motor drive assembly system is multiple motor configuration in providing powerful power, also improves the flexibility and efficiency of system, satisfies the demand of heavy mine car to power.

[0021] The utility model utilizes the characteristics of compact planetary gear structure and large transmission speed ratio range, effectively reduces the overall size and weight, and realizes light weight. DRAWINGS

[0022] The drawings accompanying the specification provide further understanding of the utility model, and the schematic embodiment of the utility model and the explanation thereof are used to explain the utility model, and do not constitute improper limitation to the utility model.

[0023] Fig. 1 The utility model discloses a double motor drive assembly system power transmission diagram.

[0024] Fig. 2 The utility model discloses a double motor drive assembly system power transmission first gear power flow diagram.

[0025] Fig. 3The power transmission two-gear power flow diagram of the dual-motor drive assembly system.

[0026] Wherein, 1-input shaft one, 2-input shaft two, 3-constant meshing gear one, 4-constant meshing gear two, 5-intermediate shaft one, 6-intermediate shaft two, 7-low speed driving gear one, 8-low speed driving gear two, 9-composite driving tooth one, 10-composite driving tooth two, 11-second composite gear shaft, 12-output shaft. DETAILED DESCRIPTION

[0027] The embodiments of the utility model will be described in detail below in combination with the drawings, but the utility model can be implemented in multiple different ways limited and covered by the claims. Embodiment 1

[0028] As Figs. 1-3 Indicated, the dual-motor drive assembly system of this embodiment includes a power output source, the input unit (input shaft one 1 and input shaft two 2) is relatively arranged with the power output source to connect the speed reduction unit;The speed reduction unit transmits torque to the low speed driving gear;The output end of the low speed driving gear is provided with the first composite gear shaft, the first composite gear shaft and the low speed driving gear are respectively engaged with the second composite gear shaft 11, the second composite gear shaft 11 includes two gears with different module numbers, the output shaft gear 12 is arranged at the output end of the second composite gear shaft 11, the output shaft gear 12 is engaged with the pinion of the first composite gear shaft, and the torque output is completed to meet the demand of the whole vehicle.

[0029] The power output source in this embodiment includes oppositely arranged motor one M1 and motor two M2, motor one M1 and motor two M2 are connected with output shaft one 1 and output shaft two 2 through spline respectively;Output shaft one 1 and output shaft two 2 are engaged with constant meshing gear one 3 and constant meshing gear two 4 to form part of the speed reduction unit.

[0030] Wherein, the constant meshing gear one 3 and the constant meshing gear two 4 are fixedly connected with the intermediate shaft one 5 and the intermediate shaft two 6 respectively.The intermediate shaft one 5 and the intermediate shaft two 6 are provided with toothed sleeves combined with the low speed driving gear one 7 and the low speed driving gear two 8.

[0031] The first composite gear shaft in this embodiment includes oppositely arranged composite driving tooth one 9 and composite driving tooth two 10, and the composite driving tooth one 9 and the composite driving tooth two 10 are coaxially arranged with the low speed driving gear one 7 and the low speed driving gear two 8 respectively;The toothed sleeve is arranged between the low speed driving gear one 7 and the composite driving tooth one 9 (the low speed driving gear two 8 and the composite driving tooth two 10).That is, the composite driving tooth one 9 and the composite driving tooth two 10 are arranged on the side away from the low speed driving gear one 7 and the low speed driving gear two 8.

[0032] The second composite gear shaft 11 in this embodiment adopts a double-tooth process, including a low-speed driven gear and a high-speed driven gear. The low-speed driven gear is engaged with the low-speed driving gear, and the high-speed driven gear is engaged with the first composite gear shaft.

[0033] The second composite gear shaft 11 adopts a suspension structure design, supported by two low-speed driving gears and the first composite gear shaft, and the rotational speed of the output shaft is inconsistent.

[0034] By using two intermediate shafts, the transmission can more effectively distribute power from different motors, reduce energy loss, and improve transmission efficiency, achieving high-efficiency conversion.

[0035] Moreover, the second composite gear shaft 11 is divided into a large gear and a small gear, adopting a double-tooth process and a two-gear design, which can achieve higher transmission efficiency and is suitable for situations that require high-efficiency transmission. The double-tooth gear process design is strict, ensuring high gear shape accuracy and being suitable for situations that require high accuracy.

[0036] The double-tooth gear structure is special, which can effectively reduce vibration and is suitable for situations that require reduced mechanical vibration. Due to its stable structure, the double-tooth gear produces less noise during operation, making it suitable for situations that require noise control. The double-tooth gear can withstand a large amount of torque and load, making it suitable for situations that require high-load transmission.

[0037] The gear adjustment method of the double-motor drive assembly system in this embodiment. In gear 1, taking the M1 side as an example, the M2 side is consistent. The power output source transmits power to the input shaft 1 through the spline connection. The constant mesh gear 3 is fixed to the intermediate shaft 5. When the gear sleeve is combined with the low-speed driving gear 7, the torque is transmitted from the intermediate shaft 5 to the low-speed driving gear 7, and then to the second composite gear shaft 11, which is supported by two low-speed driving gears and the first composite gear shaft, and the rotational speed of the output shaft is inconsistent. The torque is transmitted from the high-speed driven gear in the second composite gear shaft 11 to the composite gear shaft 9, and finally transmitted to the output shaft by the small gear of the composite gear shaft 9. The power of both sides converges, completing the output of torque and rotational speed.

[0038] In gear 1, the gear adjustment method of the double-motor drive assembly system. When the gear sleeve is engaged with the composite gear shaft 9, the torque is transmitted from the input shaft 1 to the constant mesh gear 3, the intermediate shaft 5 transmits torque to the composite gear shaft 9, and the composite gear shaft 9 transmits torque to the output shaft, completing the two-stage reduction of the transmission route.

[0039] This transmission structure design optimizes gear 1 for uphill and escape scenarios, providing strong power output; gear 2 is suitable for daily driving, ensuring smooth operation of the vehicle under various basic road conditions. This setting not only reduces the frequency of shifting during driving, but also significantly improves the safety and driving experience of the vehicle.

[0040] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the present application.

Claims

1. A dual electric motor drive assembly system, characterized by, Including power output source, relative arrangement has input unit to connect deceleration unit to the power output source, the deceleration unit transmits torque to low-speed driving gear, and the output end of low-speed driving gear is provided with first composite gear shaft, the first composite gear shaft and low-speed driving gear are respectively engaged with second composite gear shaft (11) transmission, the second composite gear shaft (11) includes two different modulus gears, and output shaft gear (12) is arranged at the output end of second composite gear shaft (11), and the output shaft gear (12) is engaged with the pinion of first composite gear shaft, and the torque output is completed to meet the demand of whole vehicle.

2. The dual motor drive assembly system of claim 1, wherein, The power output source includes motor one and motor two arranged oppositely, and the motor one and the motor two are connected with output shaft one (1) and output shaft two (2) through spline respectively; the output shaft one (1) and the output shaft two (2) are engaged with constant mesh gear one (3) and constant mesh gear two (4) respectively.

3. The dual motor drive assembly system of claim 2, wherein, The constant mesh gear one (3) and the constant mesh gear two (4) are fixedly connected with intermediate shaft one (5) and intermediate shaft two (6) respectively.

4. The dual motor drive assembly system of claim 3, wherein, The intermediate shaft one (5) and the intermediate shaft two (6) are provided with toothed sleeves combined with low-speed driving gear one (7) and low-speed driving gear two (8).

5. The dual motor drive assembly system of claim 4, wherein, The first composite gear shaft includes composite driving tooth one (9) and composite driving tooth two (10), and the side of the toothed sleeve away from the low-speed driving gear one (7) and the low-speed driving gear two (8) is provided with the composite driving tooth one (9) and the composite driving tooth two (10).

6. The dual motor drive assembly system of claim 5, wherein, The second composite gear shaft (11) adopts double connection tooth process, including low-speed driven gear and high-speed driven gear.

7. The dual motor drive assembly system of claim 6, wherein, The low-speed driven gear is engaged with the low-speed driving gear, and the high-speed driven gear is engaged with the first composite gear shaft.

8. The dual motor drive assembly system of claim 7, wherein, The second composite gear shaft (11) adopts a suspension structure design, supported by the low-speed driving tooth on both sides and the first composite gear shaft, and the rotation speed of the output shaft is inconsistent.

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