Multi-motor driving assembly system and gear adjusting method thereof

Abstract

The invention relates to a multi-motor drive assembly system which comprises a plurality of sets of power output sources, the output ends of the power output sources are connected with input shaft components, constant meshing shaft components are arranged between the adjacent input shaft components in the same set, and each constant meshing shaft component comprises a multi-stage compound gear shaft. The multi-stage compound gear shaft transmits torque to the middle shaft components on the two sides or the rear middle shaft component connected with the normally-meshed shaft component, output of the torque and the rotating speed under various working conditions is completed, and the requirement of the whole vehicle is met. According to the design of the transmission structure, the use requirements are fully considered, and the first gear specially provides strong power output for optimization of uphill and escape scenes; the second gear is suitable for daily driving, and it is ensured that the vehicle can run stably under various basic road conditions. By means of the arrangement, the gear shifting frequency in the driving process is reduced, and the safety and driving experience of the whole vehicle are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of motor drive technology, and more specifically, to a multi-motor drive assembly system and a gear adjustment method 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 automotive 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.

[0003] After searching CN202410384811.X, a vehicle drive assembly, a vehicle drive system and a vehicle are disclosed. The vehicle includes a first wheel end and a second wheel end. The drive assembly includes: a first motor and a second motor, the first motor and the second motor are respectively suitable for being connected to the first wheel end and the second wheel end in driving connection; a fifth motor, the fifth motor is connected to at least one of the first motor and the second motor; an engine, the engine is selectively connected to the first wheel end and the second wheel end in driving connection, and the engine is also selectively connected to the fifth motor in driving connection. As a result, the engine can not only drive the fifth motor to generate electricity, but also directly drive the first wheel end and the second wheel end, thereby improving the energy utilization rate of the drive assembly, which is beneficial to saving energy, and when the battery is low on power, it can also ensure the power performance of the vehicle.

[0004] However, the above solution is not suitable for the electric drive assembly system of the mine car to meet the urgent demand of modern mining for efficient and environmentally friendly mine cars.

[0005] Therefore, it is necessary to provide a drive assembly system suitable for different working scenarios of mining vehicles to ensure that the vehicle can run smoothly under various basic road conditions. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a multi-motor drive assembly system. By using an intermediate shaft, the gearbox can more effectively distribute the power from different motors, reduce energy loss, and improve transmission efficiency. The multi-gear design enables the mining car to maintain optimal performance under different loads and speeds.

[0007] The transmission structure is designed with full consideration of usage needs. The first gear 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. 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.

[0008] The above-mentioned purpose of the present invention is achieved by the following technical solutions: Disclosed is a multi-motor drive assembly system, comprising a plurality of power output sources, wherein the output ends of the power output sources are connected to input shaft components, and constant meshing shaft components are arranged between adjacent input shaft components in the same group, wherein the constant meshing shaft components include multi-stage compound gear shafts, and the multi-stage compound gear shafts transmit torque to intermediate shaft components on both sides, or to a rear intermediate shaft component connected to the constant meshing shaft components, to complete the output of torque and speed under various working conditions to meet the needs of the entire vehicle.

[0009] The multi-motor drive assembly system of the present invention arranges the power output source, input shaft component, constant meshing shaft component, intermediate shaft component, rear intermediate shaft component and output shaft in a reasonable manner so that the entire system can be suitable for driving uphill or in daily scenarios through gear adjustment.

[0010] The use of multiple power output sources, namely multi-motor configuration, not only provides powerful power, but also improves the flexibility and efficiency of the system to meet the power requirements of heavy mining vehicles.

[0011] The power output source, input shaft component, constant meshing shaft component, intermediate shaft component and rear intermediate shaft component of the present invention are all arranged symmetrically, which can effectively distribute the power from different motors, reduce energy loss and improve transmission efficiency.

[0012] Furthermore, the power output source includes a motor 1 and a motor 2 arranged opposite to each other, and the motor 1 and the motor 2 are respectively connected to the input shaft 1 and the input shaft 2 through a spline; the input shaft 1 and the input shaft 2 are respectively meshed and connected with the constant mesh gear shaft 1. The motor 1 and the motor 2 of the present invention are symmetrically arranged and meshed and connected with the constant mesh gear shaft 1 at the same time, that is, the constant mesh gear shaft 1 is arranged between the two motors, which can effectively distribute power.

[0013] Furthermore, an intermediate shaft 1 and an intermediate shaft 2 are respectively provided at the output ends of the input shaft 1 and the input shaft 2.

[0014] Furthermore, a rear intermediate shaft 1 is provided at the output end of the constant mesh gear shaft 1, and the rear intermediate shaft 1 includes an output driving tooth 1 and a low-speed gear driving tooth 1, and the output driving tooth 1 is fixedly connected to the spline of the rear intermediate shaft 1.

[0015] Furthermore, the power output source includes a motor 3 and a motor 4 arranged relatively to each other, the motor 3 and the motor 4 are respectively connected to the input shaft 3 and the input shaft 4 through a spline; the input shaft 3 and the input shaft 4 are respectively meshed and connected to the constant mesh gear shaft 2. The power output source of the present invention can be designed with four motors, and the configuration of the four motors and the design of the double intermediate shafts work together to improve the overall efficiency of the gearbox and reduce energy waste.

[0016] Furthermore, the output ends of the input shaft three and the input shaft four are respectively provided with the intermediate shaft three and the intermediate shaft four; the output end of the constant meshing gear shaft two is provided with the rear intermediate shaft two, and the rear intermediate shaft two includes the output driving tooth two and the low-speed gear driving tooth two, and the output driving tooth two is fixedly connected with the spline of the rear intermediate shaft two.

[0017] Furthermore, the constant mesh gear shaft one and the constant mesh gear shaft two are sleeved with constant mesh gears with different modules, high-speed gear driving teeth and gear sleeves, the constant mesh gears are close to the power output source side, and the high-speed gear driving teeth are far away from the power output source side.

[0018] Furthermore, the intermediate shaft 1, intermediate shaft 2, intermediate shaft 3 and intermediate shaft 4 are all compound driving gear shafts, including high-speed driven teeth meshing with high-speed driving teeth, and the low-speed driven teeth meshing with low-speed driving teeth 1 and low-speed driving teeth 2.

[0019] Another object of the present invention is to disclose a gear adjustment method for the above-mentioned multi-motor drive assembly system, wherein motor one and motor two transmit torque to input shaft one and input shaft two respectively through a spline connection, and input shaft one and input shaft two merge into the constant mesh gear of constant mesh gear shaft one, and the low-speed gear driving tooth one of the meshing gear one is combined with the gear driving tooth on the rear intermediate shaft one, and the power of the high-speed gear driving tooth of the constant mesh gear shaft one is divided into intermediate shaft one and intermediate shaft two, and the power is merged again through the low-speed gear driven teeth on the intermediate shaft components on both sides and transmitted to the gear teeth on the rear intermediate shaft component, and the output driving teeth merge again to complete the torque output.

[0020] Another object of the present invention is to disclose a gear adjustment method for the above-mentioned multi-motor drive assembly system, wherein motor one and motor two transmit torque to input shaft one and input shaft two respectively through a spline connection, and input shaft one and input shaft two merge into a constantly meshing large gear one, and when the gear sleeve is engaged with the high-speed gear driving tooth of the meshing large gear one, the torque is directly transmitted to the output driving tooth on the rear intermediate shaft one, and the two sides merge and are transmitted to the output shaft.

[0021] The 2-speed transmission design can select the most suitable gear according to different working conditions and optimize power output.

[0022] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a multi-motor drive assembly system. The configuration of four motors and the design of double intermediate shafts work together to improve the overall efficiency of the gearbox and reduce energy waste. By using two intermediate shafts, the gearbox can more effectively distribute the power from different motors, reduce energy loss, and improve transmission efficiency.

[0023] The present invention discloses a multi-motor drive assembly system that provides powerful power for the multi-motor configuration while also improving the flexibility and efficiency of the system to meet the power needs of heavy-duty mining vehicles. The transmission structure design fully considers the use requirements. The first gear is optimized for uphill and escape scenarios to provide strong power output; the second gear is suitable for daily driving to ensure that the vehicle can run smoothly under various basic road conditions. 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. The 2-speed transmission design can select the most suitable gear according to different working conditions to optimize power output.

[0024] The present invention has a compact structure, and the electric drive assembly system can operate stably in various harsh mining environments, showing excellent environmental adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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 This is a power transmission diagram of the multi-motor drive assembly system described in the present invention.

[0026] Figure 2 This is a first-gear power flow diagram of the power transmission of the multi-motor drive assembly system described in the present invention.

[0027] Figure 3 This is a second-gear power flow diagram of the power transmission of the multi-motor drive assembly system described in the present invention.

[0028] Among them, 1-input shaft one, 2-input shaft two, 3-input shaft three, 4-input shaft four, 5-constant meshing shaft one, 6-constant meshing shaft two, 7-intermediate shaft one, 8-intermediate shaft two, 9-intermediate shaft three, 10-intermediate shaft four, 11-rear intermediate shaft one, 12-rear intermediate shaft two, 13-output shaft, 14-gear sleeve, 15-output driving gear one, 16-low speed gear driving gear one, 17-output driving gear two, 18-low speed gear driving gear two, 19-constant meshing gear, 20-high speed gear driving gear, 21-high speed gear driven gear, 22-low speed gear driven gear. DETAILED DESCRIPTION

[0029] 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

[0030] like Figure 1-Figure 3As shown, the multi-motor drive assembly system of this embodiment can realize alternating gear shifting to meet the power requirements of the whole vehicle and shift power during driving without interruption. It includes a power output source. In this embodiment, the power output source is four motors with input shaft components (input shaft 1, input shaft 2, input shaft 3, and input shaft 4) arranged relatively. The four motors are divided into a group of two, that is, motor 1 M1 and motor 2 M2 are a group, and motor 3 M3 and motor 4 M4 are a group; a constant mesh shaft component (constant mesh gear shaft 1 5 and constant mesh gear shaft 2 6) is arranged between adjacent input shaft components in the same group, and the constant mesh shaft component includes a multi-stage composite gear shaft, and the multi-stage composite gear shaft transmits torque to the intermediate shaft components (intermediate shaft 1 7, intermediate shaft 2 8, intermediate shaft 3 9 and intermediate shaft 4 10) on both sides, or the rear intermediate shaft components (rear intermediate shaft 1 11 and rear intermediate shaft 2 12) connected to the constant mesh shaft components, to complete the output of torque and speed under various working conditions to meet the requirements of the whole vehicle.

[0031] In this embodiment, the motor 1 M1 and the motor 2 M2 are connected to the input shaft 1 and the input shaft 2 2 through splines respectively; the input shaft 1 and the input shaft 2 2 are respectively meshed with the constant meshing gear shaft 1 5. The output ends of the input shaft 1 and the input shaft 2 2 are respectively provided with an intermediate shaft 1 7 and an intermediate shaft 2 8.

[0032] In this embodiment, a rear intermediate shaft 11 is disposed at the output end of the constant meshing gear shaft 5. The rear intermediate shaft 11 includes an output driving tooth 15 and a low-speed gear driving tooth 2 16. The output driving tooth 15 is fixedly connected to the spline of the rear intermediate shaft 11.

[0033] The power output source in this embodiment includes a motor three M3 and a motor four M4 which are arranged relatively to each other. The motor three M3 and the motor four M4 are connected to the input shaft three 3 and the input shaft four 4 through splines respectively; the input shaft three 3 and the input shaft four 4 are meshedly connected to the constant meshing gear shaft two 6 respectively.

[0034] The output ends of input shaft three 3 and input shaft four 4 are respectively provided with intermediate shaft three 9 and intermediate shaft four 10; the output end of constant mesh gear shaft two 6 is provided with rear intermediate shaft two 12, and rear intermediate shaft two 12 includes output driving tooth two 17 and low-speed gear driving tooth two 18, and the output driving tooth two 17 is fixedly connected with the spline of rear intermediate shaft two 12.

[0035] The constant mesh gear shaft 1 5 and the constant mesh gear shaft 2 6 are sleeved with constant mesh gears 19 with different modules, high-speed gear driving teeth 20 and gear sleeves 14. The constant mesh gears are close to the power output source side, and the high-speed gear driving teeth are far away from the power output source side.

[0036] The intermediate shaft 1 7 , the intermediate shaft 2 8 , the intermediate shaft 3 9 and the intermediate shaft 4 10 in this embodiment are all compound driving gear shafts, including high-speed driven teeth 21 meshing with high-speed driving teeth 20 , and low-speed driven teeth 22 meshing with low-speed driving teeth 1 16 and low-speed driving teeth 2 18 .

[0037] The intermediate shaft component adopts the double-gear process. The process design of the double-gear is strict, which can ensure the high accuracy of its tooth shape and is suitable for occasions with high precision requirements.

[0038] By using two intermediate shafts, the gearbox can more efficiently distribute power from different motors, reduce energy loss, and improve transmission efficiency for efficient conversion.

[0039] The special structure of the duplex gear can effectively reduce vibration and is suitable for occasions where mechanical vibration needs to be reduced. Due to its stable structure, the duplex gear produces less noise during operation and is suitable for occasions where noise control is required. The duplex gear can withstand a large amount of torque and load and is suitable for occasions where high load transmission is required.

[0040] The gear adjustment method of the multi-motor drive assembly system in this embodiment. In the first gear, taking one side as an example, the motor 1 M1 and the motor 2 M2 transmit the torque to the input shaft 1 and the input shaft 2 2 respectively through the spline connection, and the input shaft 1 and the input shaft 2 2 merge to the constant meshing gear 19 of the constant meshing gear shaft 1 5, and the gear sleeve 14 of the meshing gear 1 5 is combined with the gear driving teeth on the rear intermediate shaft 1 11, and the power of the high-speed gear driving teeth 20 of the constant meshing gear shaft 5 is divided to the intermediate shaft 1 7 and the intermediate shaft 2 8, and the power is merged again through the low-speed gear driven teeth 22 on the intermediate shaft components on both sides, and transmitted to the gear teeth on the rear intermediate shaft component; the other side is the same as above; the output driving teeth merge again to complete the torque output.

[0041] In the 2nd gear, taking one side as an example, the motor 1 M1 and the motor 2 M2 transmit the torque to the input shaft 1 and the input shaft 2 2 respectively through the spline connection, and the input shaft 1 and the input shaft 2 2 merge to the constantly meshing large gear 1 5. When the gear sleeve is engaged with the high-speed gear driving tooth 20 of the meshing large gear 5, the torque is directly transmitted to the output driving tooth on the rear intermediate shaft 11; the other side is the same as above, and the two sides merge and are transmitted to the output shaft 13.

[0042] The above description 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 may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention.

Claims

1. A multi-motor drive assembly system, characterized in that: It includes multiple groups of power output sources, the output ends of the power output sources are connected to the input shaft components, and constant meshing shaft components are arranged between adjacent input shaft components in the same group. The constant meshing shaft components include multi-stage compound gear shafts. The multi-stage compound gear shafts transmit torque to the intermediate shaft components on both sides, or the rear intermediate shaft component connected to the constant meshing shaft components, to complete the output of torque and speed under various working conditions to meet the needs of the whole vehicle.

2. The multi-motor drive assembly system according to claim 1, characterized in that: The power output source comprises a motor 1 and a motor 2 which are arranged opposite to each other, wherein the motor 1 and the motor 2 are respectively connected to an input shaft 1 (1) and an input shaft 2 (2) via splines; the input shaft 1 (1) and the input shaft 2 (2) are respectively meshed with a constant meshing gear shaft 1 (5).

3. The multi-motor drive assembly system according to claim 2, characterized in that: The output ends of the input shaft 1 (1) and the input shaft 2 (2) are respectively provided with an intermediate shaft 1 (7) and an intermediate shaft 2 (8).

4. The multi-motor drive assembly system according to claim 3, characterized in that: The output end of the constant meshing gear shaft 1 (5) is provided with a rear intermediate shaft 1 (11), the rear intermediate shaft 1 (11) comprises an output driving tooth 1 (15) and a low-speed gear driving tooth 1 (16), and the output driving tooth 1 (15) is fixedly connected to the spline of the rear intermediate shaft 1 (11).

5. The multi-motor drive assembly system according to any one of claims 2 to 4, characterized in that: The power output source also includes a motor three and a motor four arranged relatively to each other, wherein the motor three and the motor four are respectively connected to the input shaft three (3) and the input shaft four (4) through splines; the input shaft three (3) and the input shaft four (4) are respectively meshed with the constant meshing gear shaft two (6).

6. The multi-motor drive assembly system according to claim 5, characterized in that: The output ends of the input shaft three (3) and the input shaft four (4) are respectively provided with intermediate shaft three (9) and intermediate shaft four (10); the output end of the constant meshing gear shaft two (6) is provided with rear intermediate shaft two (12), the rear intermediate shaft two (12) comprises output driving gear two (17) and low-speed gear driving gear two (18), and the output driving gear two (17) is fixedly connected with the spline of the rear intermediate shaft two (12).

7. The multi-motor drive assembly system according to claim 6, characterized in that: The constant mesh gear shaft 1 (5) and the constant mesh gear shaft 2 (6) are sleeved with constant mesh gears (19) of different moduli, high-speed gear driving teeth (20) and a gear sleeve (14), the constant mesh gears (19) being close to a power output source, and the high-speed gear driving teeth (20) being far from a power output source.

8. The multi-motor drive assembly system according to claim 7, characterized in that: The intermediate shaft 1 (7), the intermediate shaft 2 (8), the intermediate shaft 3 (9) and the intermediate shaft 4 (10) are all composite driving gear shafts, including a high-speed driven tooth (21) meshing with a high-speed driving tooth (20), and a low-speed driven tooth (22) meshing with a low-speed driving tooth 1 (16) and a low-speed driving tooth 2 (18).

9. A gear adjustment method for a multi-motor drive assembly system according to claim 8, characterized in that: Motor 1 and motor 2 are connected by splines to transmit torque to input shaft 1 (1) and input shaft 2 (2) respectively. Input shaft 1 (1) and input shaft 2 (2) are combined to the constant mesh gear (19) of constant mesh gear shaft 1 (5). The gear sleeve (14) of the mesh gear (5) is combined with the gear driving gear on the rear intermediate shaft 1 (11). The power of the high-speed gear driving gear (20) of the constant mesh gear shaft 1 (5) is divided to the intermediate shaft 1 (7) and the intermediate shaft 2 (8). The power is combined again through the low-speed gear driven gear (22) on the intermediate shaft components on both sides and transmitted to the gear teeth on the rear intermediate shaft component. The output driving gear is combined again to complete the torque output.

10. A gear adjustment method for a multi-motor drive assembly system according to claim 8, characterized in that: Motor 1 and motor 2 are connected via splines to transmit torque to input shaft 1 (1) and input shaft 2 (2) respectively. Input shaft 1 (1) and input shaft 2 (2) merge to constantly meshing large gear 1 (5). When the gear sleeve is engaged with the high-speed gear driving tooth (20) of the meshing large gear 1 (5), the torque is directly transmitted to the output driving tooth on the rear intermediate shaft 1 (11). The two sides merge and are transmitted to the output shaft (13).

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