Dual-motor drive assembly system and application thereof

Abstract

The invention relates to a dual-motor drive assembly system which comprises output power sources arranged oppositely, and the output power sources drive a planetary gear mechanism to complete speed reduction adjustment. The planetary gear mechanism comprises a sun gear arranged in the center, compound planet gears are arranged on the two sides of the sun gear, the output ends of the compound planet gears are connected with the intermediate shaft, and the planetary gear mechanism transmits torque to the intermediate shaft; a plurality of groups of gear shifting mechanisms are arranged on the intermediate shaft, driving gears with different gears are arranged between the gear shifting mechanisms and the planetary gear mechanism or among the gear shifting mechanisms, the driving gears are meshed with corresponding driven gears, and the driven gears are mounted on the output shaft; the whole set of power output is completed by engaging different gear teeth and converging through the gear sleeve. 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 present invention relates to the field of motor drive technology, and more specifically, to a dual-motor drive assembly system and applications thereof. Background Art

[0002] As the core part of the power system of new energy heavy trucks, the performance of the central electric drive assembly directly affects the overall efficiency and operating costs of the vehicle. The central electric drive assembly is a powertrain that integrates the drive motor and the gearbox, replacing the traditional engine and gearbox, but still requires a drive shaft and a traditional axle. In terms of layout, the central electric drive assembly is similar to the traditional automobile powertrain. However, its transmission route is long, the energy loss is large, the system efficiency is low, and a large amount of bottom space is occupied. In the mining field, traditional fuel mining cars can no longer meet the green and environmental protection requirements of modern society due to their high energy consumption and high pollution. Therefore, the development of an efficient and environmentally friendly new energy mining car has become an urgent need in the industry.

[0003] After searching, CN202422704399.3 discloses a coaxial dual-motor power split hybrid system structure. It includes a wheel output shaft, an engine input shaft, a GM motor, a TM drive motor, a GM motor sun gear, a GM motor planetary gear, a TM motor sun gear, a TM motor planetary gear and a ring gear; the engine input shaft is connected to the GM motor planetary gear through a planet carrier, one end of the GM motor planetary gear is meshed with the ring gear, the other end of the GM motor planetary gear is meshed with the GM motor sun gear, and the GM motor sun gear is connected to the GM motor through the GM motor shaft; the TM drive motor is connected to the TM motor sun gear through the TM motor shaft, the TM motor sun gear is meshed with one end of the TM motor planetary gear, and the other end of the TM motor planetary gear is meshed with the ring gear; the ring gear is connected to the wheel output shaft.

[0004] CN202411189318.9 discloses a dual-motor drive system and an engineering vehicle, wherein the dual-motor drive system comprises a first drive motor, a second drive motor and a gearbox with an integrated power take-off, wherein the output end of the first drive motor is connected to the gearbox input shaft, the gearbox output shaft is connected to the vehicle axle through a transmission shaft, the power take-off output shaft is connected to an oil pump, and the second drive motor is coaxially connected in series with the first drive motor through a clutch mechanism; when operating on the vehicle, the clutch mechanism separates the power of the two motors, and the first drive motor is driven alone; when the vehicle is driving, the clutch mechanism engages the power of the two motors, and the two motors are driven together.

[0005] The above technologies are not fully applicable to the mining field. Therefore, it is of great significance to develop electric drive assembly systems for new energy wide-body mine cars to meet the needs of modern mining for efficient and environmentally friendly mine cars. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a dual-motor drive assembly system. By using two intermediate shafts, the gearbox can more effectively distribute the 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. The electric drive assembly system will adopt the latest electric technology, with the advantages of high efficiency, low energy consumption, and zero emissions, which can effectively reduce the operating cost of the mine car and improve the environmental protection level of mining production.

[0007] In addition, the electric drive assembly system will also adopt advanced intelligent control technology to realize automatic driving and remote monitoring of the mine car, improving the safety and operating efficiency of the mine car.

[0008] The above-mentioned purpose of the present invention is achieved by the following technical solutions: Disclosed is a dual-motor drive assembly system, comprising output power sources arranged relatively to each other, wherein the output power sources drive a planetary gear mechanism to complete speed reduction adjustment; The planetary gear mechanism comprises a centrally arranged sun gear, and compound planetary gears are arranged on both sides of the sun gear, and the output ends of the compound planetary gears are connected to the intermediate shaft, and the planetary gear mechanism transmits the torque to the intermediate shaft; A plurality of shifting mechanisms are arranged on the intermediate shaft, and driving gears with different gears are arranged between the shifting mechanism and the planetary gear mechanism or between the shifting mechanisms. The driving gears are meshed with corresponding driven gears, and the driven gears are mounted on the output shaft; different gear teeth are engaged and merged by the gear sleeve to complete the whole set of power output.

[0009] The dual-motor drive assembly system of the present invention sets the entire system to be symmetrically designed along the output axis. Through the drive of the motors on both sides and the reasonable arrangement of the planetary gear mechanism, the shift mechanism and the driven gear, the transmission efficiency is improved and the energy loss is reduced. The dual-motor input can achieve better power distribution and energy recovery, thereby improving the overall energy efficiency.

[0010] Furthermore, the sun gear of the planetary gear mechanism is mounted on the input shaft of the output power source, and the sun gear includes a sun gear 1 and a sun gear 2 which are arranged opposite to each other.

[0011] Furthermore, the two sides of the sun gear 1 and the sun gear 2 are respectively meshed with the compound planetary gear 1 and the compound planetary gear 2; the compound planetary gear 1 and the compound planetary gear 2 are both provided with high-speed driving teeth and low-speed driven gears.

[0012] Furthermore, a fixed ring gear is arranged on the outside of the low-speed driven gear, and the fixed ring gear is an external gear. The compound planetary gear one and the compound planetary gear two are mounted on the planetary carrier one and the planetary carrier two. The planetary gears rotate on the planetary carrier and revolve on the fixed ring gear, so that the planetary gear mechanism has different degrees of freedom.

[0013] Further, the external splines of the low-speed driven gear mesh with the internal splines of the fixed ring gear.

[0014] Furthermore, a 3rd gear driving gear 1 and a 3rd gear driving gear 2 are installed on the intermediate shaft close to one side of the planetary gear mechanism; a 3rd gear driven gear is arranged between the 3rd gear driving gear 1 and the 3rd gear driving gear 2, and the teeth of the 3rd gear driven gear simultaneously mesh with the teeth of the 3rd gear driving gear 1 and the 3rd gear driving gear 2.

[0015] Furthermore, the output ends of the 3rd gear driving gear 1 and the 3rd gear driving gear 2 are respectively installed with a shift mechanism 1 and a shift mechanism 2; the shift mechanism 1 includes a shift gear sleeve 1 and a 3rd gear gear position 1, a neutral gear position 1 and a 2nd gear gear position 1; the shift mechanism 2 has the same structure as the shift mechanism 1.

[0016] Furthermore, a 2nd gear driving gear 1 and a 2nd gear driving gear 2 are installed on the intermediate shaft away from the side of the planetary gear mechanism; a 2nd gear driven gear is arranged between the 2nd gear driving gear 1 and the 2nd gear driving gear 2, and the gear teeth of the 2nd gear driven gear simultaneously mesh with the gear teeth of the 2nd gear driving gear 1 and the 2nd gear driving gear 2.

[0017] Furthermore, the output ends of the 2nd gear driving gear 1 and the 2nd gear driving gear 2 are respectively connected to the 1st gear driving gear 1 and the 1st gear driving gear 2; the output ends of the 1st gear driving gear 1 and the 1st gear driving gear 2 are respectively connected to the shift mechanism 3 and the shift mechanism 4; the 1st gear driven gear is arranged between the 1st gear driving gear 1 and the 1st gear driving gear 2, and the gear teeth of the 1st gear driven gear simultaneously mesh with the gear teeth of the 1st gear driving gear 1 and the 1st gear driving gear 2.

[0018] Furthermore, the 3rd gear driven gear, the 2nd gear driven gear and the 1st gear driven gear are sequentially arranged on the output shaft; the output shaft is arranged in parallel with the intermediate shaft. The parallel shaft structure is simple in design and easy to maintain and repair. The use of the high-speed planetary gear mechanism reduces mechanical wear and prolongs the service life of the system.

[0019] The dual motor configuration can provide greater torque and power to meet the power requirements of heavy-duty mining vehicles. The 3-speed transmission design can select the most suitable gear according to different working conditions and optimize power output.

[0020] Another object of the present invention is to disclose the application of the above-mentioned dual-motor drive assembly system for use in the reducer of a new energy wide-body mining car.

[0021] Compared with the prior art, the present invention has the following beneficial effects: The dual-motor drive assembly system disclosed in the present invention, through the ingenious combination of a planetary gear mechanism and an intermediate shaft, minimizes the size of the gearbox while maintaining powerful functions, thereby providing greater spatial freedom for vehicle design.

[0022] The dual-motor drive assembly system disclosed in the present invention is cleverly designed, has high space utilization, and a compact structural design that helps reduce material usage, thereby reducing overall weight, which is crucial to improving the fuel economy and performance of the mining car.

[0023] The dual-motor drive assembly system disclosed in the present invention has a structure that is easy to implement modular production, and is convenient for rapid adjustment and customization according to different vehicle models and performance requirements, thereby greatly shortening the product development cycle.

[0024] The dual-motor drive assembly system disclosed in the present invention has a compact design that is not only easy to install, but also simplifies daily maintenance and repair work, thereby reducing operating costs.

[0025] The dual-motor drive assembly system disclosed in the present invention can operate stably in various harsh mining environments and exhibit excellent environmental adaptability due to its compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the dual-motor drive assembly system described in the present invention.

[0027] Figure 2 for Figure 1 A magnified view of the structure in the middle.

[0028] Figure 3 for Figure 1 A magnified view of the structure at center C.

[0029] Figure 4 This is a first-gear power flow diagram of the power transmission of the dual-motor drive assembly system described in the present invention.

[0030] Figure 5 This is a second-gear power flow diagram of the power transmission of the dual-motor drive assembly system described in the present invention.

[0031] Figure 6 This is a three-speed power flow diagram of the power transmission of the dual-motor drive assembly system described in the present invention.

[0032] Among them, 1. Sun gear one, 2. Planet carrier one, 3. Compound planet gear one, 4. Fixed gear ring one, 5. 3rd gear driving gear one, 6. 2nd gear driving gear one, 7. 1st gear driving gear one, 8. Power take-off, 9. 3rd gear driven gear, 10. 2nd gear driven gear, 11. 1st gear driven gear, 12. Output shaft, 13. Mechanical pump, 14. Shift mechanism one, 141. Shift gear sleeve one, 142. 3rd gear position one, 143. Neutral gear position 1, 144. 2nd gear position 1, 15. Shift mechanism 3, 151. Shift gear sleeve 1, 152. 1st gear position 1, 153. Neutral gear sleeve 2, 17. Bearing, 1'. Sun gear 2, 2'. Planet carrier 2, 3'. Compound planetary gear 2, 4'. Fixed gear ring 2, 5'. 3rd gear driving gear 2, 6. 2nd gear driving gear 2, 7. 1st gear driving gear 2, 8. Power take-off, 14'. Shift mechanism 2, 15'. Shift mechanism 4. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims. Example 1

[0034] like Figure 1-Figure 3 As shown, the dual-motor drive assembly system of this embodiment includes relatively arranged output power sources. The output power sources in this embodiment are symmetrically arranged motors M1 and M2. Motors M1 and M2 are respectively connected to input shafts, one end of the input shaft is connected to the other end of the motor to drive a planetary gear mechanism to complete deceleration adjustment.

[0035] In this embodiment, the motor M1 and the motor M2 are connected to the planetary gear mechanism through the input shaft. The motor M1 is fixedly connected to the sun gear 1, and the two sides of the sun gear 1 are provided with compound planetary gears 3, and the compound planetary gears 3 are provided with a first high-speed driving gear and a first low-speed driven gear. The first low-speed driven gear is provided with a fixed ring gear 4 on the outside, and the fixed ring gear 4 is an external gear. The compound planetary gear 3 is installed on the planet carrier 2. The compound planetary gear 3 rotates on the planet carrier 2 and revolves on the fixed ring gear 4, so that the planetary gear mechanism has different degrees of freedom. The outer spline of the first low-speed driven gear is meshed with the inner spline of the fixed ring gear 4.

[0036] Correspondingly, the motor M2 is fixedly connected to the sun gear 2 1', and the two sides of the sun gear 2 1' are provided with compound planetary gears 2 3', and the compound planetary gears 2 3' are provided with a second high-speed driving gear and a second low-speed driven gear. The second low-speed driven gear is provided with a fixed gear ring 2 4' on the outside, and the fixed gear ring 2 4' is an external gear, and the fixed gear ring 1 4 and the fixed gear ring 2 4' are installed in the gearbox housing.

[0037] The composite planetary gear 2 3' is mounted on the planetary carrier 2'. The composite planetary gear 2 3' rotates on the planetary carrier 2' and revolves on the fixed gear ring 2 4', so that the planetary gear mechanism has different degrees of freedom. The external spline of the second low-speed driven gear meshes with the internal spline of the fixed gear ring 2 4'.

[0038] In addition, a 3rd gear driving gear 1 5 and a 3rd gear driving gear 2 5' are installed on the intermediate shaft close to the planetary gear mechanism; a 3rd gear driven gear 9 is arranged between the 3rd gear driving gear 1 5 and the 3rd gear driving gear 2 5', and the gear teeth of the 3rd gear driven gear 9 simultaneously mesh with the gear teeth of the 3rd gear driving gear 1 5 and the 3rd gear driving gear 2 5'.

[0039] More specifically, the output ends of the 3rd gear driving gear 1 5 and the 3rd gear driving gear 2 5' are respectively installed with a shift mechanism 1 14 and a shift mechanism 2 14'; the shift mechanism 1 14 includes a shift gear sleeve 141 and a 3rd gear gear position 1 142, a neutral gear position 1 143 and a 2nd gear gear position 1 144; the structure of the shift mechanism 2 14' is consistent with that of the shift mechanism 1 14.

[0040] A 2nd gear driving gear 1 6 and a 2nd gear driving gear 2 6' are installed on the intermediate shaft away from the planetary gear mechanism; a 2nd gear driven gear 10 is arranged between the 2nd gear driving gear 1 6 and the 2nd gear driving gear 2 6', and the gear teeth of the 2nd gear driven gear 10 simultaneously mesh with the gear teeth of the 2nd gear driving gear 1 6 and the 2nd gear driving gear 2 6'.

[0041] The output ends of the 2nd gear driving gear 1 6 and the 2nd gear driving gear 2 6' are respectively connected to the 1st gear driving gear 1 7 and the 1st gear driving gear 2 7'; the output ends of the 1st gear driving gear 1 7 and the 1st gear driving gear 2 7' are respectively connected to the shift mechanism 3 15 and the shift mechanism 4 15'; in this embodiment, the shift mechanism 3 15 includes a shift gear sleeve 151, a 1st gear gear position 1 152 and a neutral gear sleeve 2 153, and a 1st gear driven gear 11 is arranged between the 1st gear driving gear 1 7 and the 1st gear driving gear 2 7', and the gear teeth of the 1st gear driven gear 11 simultaneously mesh with the gear teeth of the 1st gear driving gear 1 7 and the 1st gear driving gear 2 7'.

[0042] The 3rd gear driven gear 9, the 2nd gear driven gear 10 and the 1st gear driven gear 11 are arranged on the output shaft 12 in sequence; the output shaft 12 is arranged in parallel with the intermediate shaft.

[0043] A power take-off 8 and a mechanical pump 13 are respectively provided at the ends of the intermediate shaft, and the power take-off 8 and the mechanical pump 13 are driven parts.

[0044] like Figure 4-Figure 6As shown in the figure, the transmission structure design is optimized for uphill and escape scenarios, providing strong power output; the second gear is suitable for daily driving, ensuring that the vehicle can run smoothly under various basic road conditions; the third gear is used for overtaking. This setting not only reduces the frequency of gear shifting during driving, but also significantly improves the safety and driving experience of the entire vehicle.

[0045] The gear adjustment method of the power transmission of the dual-motor drive assembly system is as follows: the motor M1 inputs the torque into the sun gear 1, and completes the second-stage reduction through the compound planetary gear 3. The planetary carrier 2 is spline-connected with the intermediate shaft, and the torque is transmitted to the intermediate shaft (the power is interrupted when there is no neutral position between the mechanical pump 13 and the power take-off 8 on both sides), and the different gear teeth and confluence are engaged by the gear sleeve to complete the whole set of power output.

[0046] Specifically, in the 1st gear, the 1st gear teeth in the shift mechanism 3 15 and the shift mechanism 4 15' come into play, the output power sources on both sides drive the sun gear 1 and the sun gear 2 1', the sun gear 1 and the sun gear 2 1' drive the compound planetary gear 1 3 and the compound planetary gear 2 3', the power is output by the planetary carriers on both sides (planetary carrier 1 2 and planetary carrier 2 2') to drive the intermediate shaft to rotate; then the power is output to the shift mechanism 3 15 and the shift mechanism 4 15'; the 1st gear driving tooth 1 7 and the 1st gear driving tooth 2 7' work together to merge at the 1st gear driven gear 11, and the power is output through the output shaft 12.

[0047] In the 2nd gear, the 2nd gear position in the shift mechanism 1 14 and the shift mechanism 2 14' comes into play, the output power sources on both sides drive the sun gear 1 and the sun gear 2 1', the sun gear 1 and the sun gear 2 1' drive the compound planetary gear 1 3 and the compound planetary gear 2 3', the power is output by the planetary carriers on both sides (planetary carrier 1 2 and planetary carrier 2 2') to drive the intermediate shaft to rotate; then the power is output to the shift mechanism 1 14 and the shift mechanism 2 14'; the 2nd gear driving gear 1 6 and the 2nd gear driving gear 2 6' work together, merge at the 2nd gear driven gear 10, and the power is output through the output shaft 12.

[0048] In the third gear, the third gear teeth in the shift mechanism 1 14 and the shift mechanism 2 14' come into play, the output power sources on both sides drive the sun gear 1 and the sun gear 2 1', the sun gear 1 and the sun gear 2 1' drive the compound planetary gear 1 3 and the compound planetary gear 2 3', the power is output by the planetary carriers on both sides (planetary carrier 1 2 and planetary carrier 2 2') to drive the intermediate shaft to rotate; then the power is output to the shift mechanism 1 14 and the shift mechanism 2 14'; the third gear driving gear 1 5 and the third gear driving gear 2 5' work together, merge at the third gear driven gear 9, and output the power through the output shaft 12. The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. A dual-motor drive assembly system, characterized in that: It includes output power sources arranged relatively to each other, and the output power sources drive the planetary gear mechanism to complete the speed reduction adjustment; The planetary gear mechanism comprises a centrally arranged sun gear, and compound planetary gears are arranged on both sides of the sun gear, and the output ends of the compound planetary gears are connected to the intermediate shaft, and the planetary gear mechanism transmits the torque to the intermediate shaft; A plurality of shifting mechanisms are arranged on the intermediate shaft, and driving gears with different gears are arranged between the shifting mechanism and the planetary gear mechanism or between the shifting mechanisms. The driving gears are meshed with corresponding driven gears, and the driven gears are mounted on the output shaft; different gear teeth are engaged and merged by the gear sleeve to complete the whole set of power output.

2. The dual-motor drive assembly system according to claim 1, characterized in that: The sun gear of the planetary gear mechanism is mounted on the input shaft of the output power source, and the sun gear comprises a sun gear 1 (1) and a sun gear 2 (1') which are arranged opposite to each other.

3. The dual-motor drive assembly system according to claim 2, characterized in that: The two sides of the sun gear 1 (1) and the sun gear 2 (1') are respectively meshed with the compound planetary gear 1 (3) and the compound planetary gear 2 (3'); the compound planetary gear 1 (3) and the compound planetary gear 2 (3') are both provided with high-speed driving teeth and low-speed driven gears.

4. The dual-motor drive assembly system according to claim 3, characterized in that: A fixed gear ring is arranged outside the low-speed driven gear, and the fixed gear ring is an external gear. The compound planetary gear 1 (3) and the compound planetary gear 2 (3') are mounted on the planetary carrier 1 (2) and the planetary carrier 2 (2'). The planetary gears rotate on the planetary carrier and revolve on the fixed gear ring, so that the planetary gear mechanism has different degrees of freedom.

5. The dual-motor drive assembly system according to claim 4, characterized in that: The outer spline of the low-speed driven gear meshes with the inner spline of the fixed gear ring; a third-speed driving gear 1 (5) and a third-speed driving gear 2 (5') are mounted on the intermediate shaft close to the planetary gear mechanism; a third-speed driven gear (9) is arranged between the third-speed driving gear 1 (5) and the third-speed driving gear 2 (5'), and the gear teeth of the third-speed driven gear (9) simultaneously mesh with the gear teeth of the third-speed driving gear 1 (5) and the third-speed driving gear 2 (5').

6. The dual-motor drive assembly system according to claim 5, characterized in that: The output ends of the 3rd gear driving gear 1 (5) and the 3rd gear driving gear 2 (5') are respectively provided with a shift mechanism 1 (14) and a shift mechanism 2 (14'); the shift mechanism 1 (14) comprises a shift gear sleeve 1 (141) and a 3rd gear gear position 1 (142), a neutral gear position 1 (143) and a 2nd gear gear position 1 (144); the shift mechanism 2 (14') has the same structure as the shift mechanism 1 (14).

7. The dual-motor drive assembly system according to claim 6, characterized in that: A second-gear driving gear 1 (6) and a second-gear driving gear 2 (6') are mounted on an intermediate shaft at a side away from the planetary gear mechanism; a second-gear driven gear (10) is arranged between the second-gear driving gear 1 (6) and the second-gear driving gear 2 (6'), and the gear teeth of the second-gear driven gear (10) simultaneously mesh with the gear teeth of the second-gear driving gear 1 (6) and the second-gear driving gear 2 (6').

8. The dual-motor drive assembly system according to claim 7, characterized in that: The output ends of the 2nd gear driving gear 1 (6) and the 2nd gear driving gear 2 (6') are respectively connected to the 1st gear driving gear 1 (7) and the 1st gear driving gear 2 (7'); the output ends of the 1st gear driving gear 1 (7) and the 1st gear driving gear 2 (7') are respectively connected to the shift mechanism 3 (15) and the shift mechanism 4 (15'); a 1st gear driven gear (11) is arranged between the 1st gear driving gear 1 (7) and the 1st gear driving gear 2 (7'), and the gear teeth of the 1st gear driven gear (11) simultaneously mesh with the gear teeth of the 1st gear driving gear 1 (7) and the 1st gear driving gear 2 (7').

9. The dual-motor drive assembly system according to claim 8, characterized in that: The 3rd gear driven gear (9), the 2nd gear driven gear (10) and the 1st gear driven gear (11) are arranged on the output shaft (12) in sequence; the output shaft (12) is arranged in parallel with the intermediate shaft.

10. An application of the dual-motor drive assembly system according to any one of claims 1 to 9, characterized in that: Reducer for new energy wide-body mining vehicles.

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