Four-motor three-gear parallel shaft electric drive axle

Abstract

The utility model provides a kind of four-motor three-gear parallel shaft electric drive axle.The four-motor three-gear parallel shaft electric drive axle includes input assembly, connecting assembly, intermediate assembly and output assembly connected in sequence, two input assemblies are connected to the same connecting assembly, each input assembly includes two motors, the connecting assembly is provided with a first gear shifting unit, which is arranged between the connecting assembly and the output assembly, the intermediate assembly is provided with a second gear shifting unit, and the output assembly is provided with an auxiliary motor.The four-motor three-gear parallel shaft electric drive axle provided by the utility model solves the problem that the existing electric drive axle scheme cannot meet the use requirements.

Description

Technical Field

[0001] This utility model relates to the field of electric drive bridges, specifically to a four-motor, three-speed parallel shaft electric drive bridge. Background Technology

[0002] Compared to passenger vehicle electric drive systems, commercial vehicle electric drive systems face multiple parallel technological approaches. This is due to the diverse types and uses of commercial vehicles, resulting in the industry's characteristics of small-batch production, multiple varieties, and customization. Currently, the new energy heavy-duty truck market is rapidly expanding, with designs using central electric drive assemblies as the power system becoming increasingly common. As the core component of the power system, the performance of the central electric drive assembly directly impacts the vehicle's overall efficiency and operating costs. Since some new energy heavy-duty trucks are designed for specific operating conditions—for example, a certain model requires high transmission efficiency, powerful performance, and ease of maintenance and repair—the currently mainstream integrated electric drive axle solution, while offering advantages in transmission efficiency and smoothness, cannot meet these requirements. Utility Model Content

[0003] To address the problem that existing electric drive axle solutions cannot meet usage requirements, this utility model provides a four-motor, three-speed parallel shaft electric drive axle that solves the aforementioned problem.

[0004] A four-motor, three-speed parallel-axis electric drive bridge includes an input component, a connecting component, an intermediate component, and an output component connected in sequence. The input components are connected to the same connecting component. Each input component includes two motors. The connecting component is provided with a first shifting unit located between the connecting component and the output component. The intermediate component is provided with a second shifting unit. The output component is provided with an auxiliary motor.

[0005] In a preferred embodiment of the four-motor three-speed parallel shaft electric drive bridge provided by this utility model, the input component includes an input shaft, and a large input tooth and a small input tooth fixedly disposed on the input shaft. Each motor shaft end is provided with a motor tooth. The large input tooth connects to two motor teeth at the same time, and the small input tooth connects to the connecting component.

[0006] In a preferred embodiment of the four-motor, three-speed parallel-axis electric drive bridge provided by this utility model, the connecting assembly includes a connecting shaft, and connecting teeth, a second-speed connecting tooth, and a first-speed connecting tooth fixedly disposed on the connecting shaft. The connecting teeth simultaneously connect to two of the input pinions, and the second-speed connecting tooth and the first-speed connecting tooth are both connected to the intermediate assembly. The first shifting unit is fixedly disposed at the end of the connecting shaft, and the first shifting unit switches the connection between the connecting shaft and the output assembly, or disconnects it from the output assembly.

[0007] In a preferred embodiment of the four-motor three-speed parallel shaft electric drive bridge provided by this utility model, the intermediate component includes an intermediate shaft, an intermediate second gear and an intermediate first gear rotatably disposed on the intermediate shaft, and an intermediate gear fixedly disposed on the intermediate shaft. The intermediate second gear and the intermediate first gear are respectively connected to the connecting second gear and the connecting first gear, and the intermediate gear is connected to the output component.

[0008] In a preferred embodiment of the four-motor three-speed parallel shaft electric drive bridge provided by this utility model, the output component includes an output shaft and an output tooth fixedly disposed on the output shaft. The intermediate tooth is connected to the output tooth. The first shifting unit is fixedly disposed at the end of the connecting shaft and disposed between the connecting shaft and the output shaft. The first shifting unit switches the connection between the connecting shaft and the output shaft or disconnects from the output shaft.

[0009] The output assembly also includes a differential and two half-shafts connected within the differential, with the output shaft connected to the differential housing. The output assembly also includes an output planetary gear set, with the sun gear of the output planetary gear set connected to the output shaft and the planet carrier of the output planetary gear set connected to the differential housing.

[0010] Compared with existing technologies, the four-motor, three-speed parallel-axis electric drive bridge provided by this utility model has the following advantages:

[0011] 1. The solution provided by this utility model uses two power routes to effectively couple the power from four motors, which can reduce energy loss and improve transmission efficiency, achieving high-efficiency conversion. Furthermore, the configuration of multiple input motors combined with output auxiliary motors provides powerful power output, improves system flexibility and efficiency, and adapts to the power requirements of heavy-duty mining trucks.

[0012] 2. The solution provided by this utility model adopts a two-speed transmission on the intermediate shaft combined with a high-speed transmission on the half-shaft, which allows for selection of the most suitable gear according to different working conditions, optimizing power output. The three-speed transmission combined with the auxiliary motor at the output end provides flexible operation and further optimizes the power structure, enabling the mine car to maintain optimal performance under different loads and speeds.

[0013] 3. The solution provided by this utility model adopts a design of low-speed reduction via an intermediate shaft and direct output via a high-speed half-shaft, resulting in a more compact structure, improved transmission efficiency, and reduced energy waste. It also reduces the overall weight, contributing to improved fuel economy and operational performance of the mining car.

[0014] 4. The solution provided by this utility model is easy to achieve modular production, and can be quickly adjusted and customized according to different vehicle models and performance requirements, which greatly shortens the product development cycle. Attached Figure Description

[0015] Figure 1 This is the schematic diagram of a four-motor, three-speed parallel-axis electric drive bridge.

[0016] The following are the numbered components in the diagram: Motor 11, Motor Gear 12, Input Shaft 13, Input Large Gear 14, Input Small Gear 15, Connecting Shaft 21, Connecting Gear 22, Connecting Second Gear Gear 23, Connecting First Gear Gear 24, First Gear Shifting Mechanism 25, Intermediate Shaft 31, Intermediate Second Gear Gear 32, Intermediate First Gear Gear 33, Intermediate Gear Gear 34, Second Gear Shifting Mechanism 35, Output Shaft 41, Output Gear Gear 42, Output Planetary Gear Set 43, Differential 44, Half Shaft 45, Auxiliary Motor 46. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Please see Figure 1 This is a schematic diagram of the four-motor, three-speed parallel-axis electric drive bridge provided by this utility model. It includes an input component, a connection component, an intermediate component, and an output component.

[0019] The input assembly includes a motor 11, motor teeth 12, an input shaft 13, a large input tooth 14, and a small input tooth 15. Two motors 11 are arranged side-by-side in the same direction, and each motor 11 has a motor tooth 12 at its shaft end. The input shaft 13 is parallel to the motors 11 and located between the two motors 11. A large input tooth 14 is fixedly mounted at one end of the input shaft 13, and a small input tooth 15 is fixedly mounted at the other end. The two motor teeth 12 mesh with the same large input tooth 14. Two input units are provided, and the small input teeth 15 in both input units are connected to the same connecting assembly.

[0020] The connecting assembly includes a connecting shaft 21, a connecting tooth 22, a connecting second gear tooth 23, a connecting first gear tooth 24, and a first shifting mechanism 25.

[0021] The connecting shaft 21 is parallel to the input shaft 13. A connecting tooth 22 is fixedly mounted on the connecting shaft 21, a second-gear connecting tooth 23 is rotatably mounted, a first-gear connecting tooth 24 is rotatably mounted, and a first shifting mechanism 25 is fixedly mounted on the connecting shaft 21. Two input pinions 15 in the two input units mesh with the same connecting tooth 22, and the second-gear connecting tooth 23 and the first-gear connecting tooth 24 are connected to the intermediate assembly.

[0022] The intermediate assembly includes an intermediate shaft 31, an intermediate second gear 32, an intermediate first gear 33, an intermediate gear 34, and a second shifting mechanism 35.

[0023] The intermediate shaft 31 is parallel to the connecting shaft 21. A second intermediate gear 32 is rotatably mounted on the intermediate shaft 31, a second shifting mechanism 35 is fixedly mounted, a first intermediate gear 33 is rotatably mounted, and an intermediate gear 34 is fixedly mounted. The second intermediate gear 23 and the first intermediate gear 24 mesh with the second intermediate gear 32 and the first intermediate gear 33 respectively, and the intermediate gear 34 is connected to the output assembly.

[0024] The output components include an output shaft 41, an output gear 42, an output planetary gear set 43, a differential 44, a half shaft 45, and an auxiliary motor 46.

[0025] The output shaft 41 is parallel to the intermediate shaft 31 and coaxial with the connecting shaft 21. One end of the output shaft 41 passes through the connecting shaft 21, and the other end is connected to the sun gear of the output planetary gear set 43. Output teeth 42 are fixedly provided on the output shaft 41 between the output planetary gear set 43 and the connecting shaft 21, and an auxiliary motor 46 is provided on the output shaft 41 that extends to the other end of the connecting shaft 21. The auxiliary motor 46 is used for auxiliary braking or auxiliary driving, which is a common solution in this field and will not be described in detail.

[0026] The intermediate gear 34 meshes with the output gear 42. The planet carrier of the output planetary gear set 43 is connected to the housing of the differential 44, and the two half-shafts 45 are connected to the differential 44.

[0027] The first shifting mechanism 25 is located at the end of the connecting shaft 21 near the output shaft 41. Both the connecting shaft 21 and the output shaft 41 are provided with splines. The connecting shaft 21 and the output shaft 41 can be fixedly connected or disconnected by moving the gear sleeve of the first shifting mechanism 25.

[0028] The second shifting mechanism 35 is located between the intermediate second gear tooth 32 and the intermediate first gear tooth 33. Splines are provided on the intermediate shaft 31, the intermediate second gear tooth 32 and the intermediate first gear tooth 33. By moving the gear sleeve of the second shifting mechanism 35, the intermediate shaft 31 and the intermediate second gear tooth 32 are fixedly connected, and the intermediate shaft 31 and the intermediate first gear tooth 33 are fixedly connected or disconnected.

[0029] When the first shift mechanism 25 is disengaged and the second shift mechanism 35 fixes the intermediate shaft 31 and the intermediate first gear 33 together, it is the first gear of the electric drive bridge.

[0030] At this time, the power generated by the input component is transmitted sequentially through the input pinion 15, connecting pinion 22, connecting first gear pinion 24, intermediate first gear pinion 33, intermediate pinion 34, and output pinion 42 to the output shaft 41. After being reduced in speed by the output planetary gear set 43, the power is distributed to the half shaft 45 by the differential 44.

[0031] When the first shift mechanism 25 is disengaged and the second shift mechanism 35 fixes the intermediate shaft 31 and the intermediate second gear 32, it is the second gear of the electric drive bridge.

[0032] At this time, the power generated by the input component is transmitted sequentially through the input pinion 15, connecting pinion 22, connecting second gear pinion 23, intermediate second gear pinion 32, intermediate pinion 34, and output pinion 42 to the output shaft 41. The power is then reduced by the output planetary gear set 43 and distributed to the half shaft 45 by the differential 44.

[0033] When the first shift mechanism 25 fixes the connection between the connecting shaft 21 and the output shaft 41, and the second shift mechanism 35 is disconnected, it is in the third gear of the electric drive bridge.

[0034] At this time, the power generated by the input component is transmitted to the connecting shaft 21 through the input pinion 15 and the connecting pinion 22 in sequence. It then directly drives the output shaft 41 through the first shifting mechanism 25, and is decelerated by the output planetary gear set 43. Finally, the power is distributed to the half shaft 45 by the differential 44.

[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A four-motor, three-speed parallel-axis electric drive bridge, characterized in that: The device includes an input component, a connection component, an intermediate component, and an output component connected in sequence. Two of the input components are connected to the same connection component. Each input component includes two motors. The connection component is provided with a first shifting unit located between the connection component and the output component. The intermediate component is provided with a second shifting unit. The output component is provided with an auxiliary motor.

2. The four-motor, three-speed parallel-axis electric drive bridge according to claim 1, characterized in that: The input component includes an input shaft, and a large input tooth and a small input tooth fixedly disposed on the input shaft. Each motor shaft end is provided with a motor tooth. The large input tooth connects to two motor teeth at the same time, and the small input tooth connects to the connecting component.

3. The four-motor, three-speed parallel-axis electric drive bridge according to claim 2, characterized in that: The connecting assembly includes a connecting shaft, and connecting teeth, a second-position connecting tooth, and a first-position connecting tooth fixedly disposed on the connecting shaft. The connecting teeth simultaneously connect to two of the input small teeth, and the second-position connecting tooth and the first-position connecting tooth are both connected to the intermediate assembly.

4. The four-motor, three-speed parallel-axis electric drive bridge according to claim 3, characterized in that: The first shifting unit is fixedly mounted on the end of the connecting shaft. The first shifting unit switches the connection between the connecting shaft and the output component, or disconnects it from the output component.

5. The four-motor, three-speed parallel-axis electric drive bridge according to claim 3 or 4, characterized in that: The intermediate component includes an intermediate shaft, an intermediate second gear and an intermediate first gear rotatably disposed on the intermediate shaft, and an intermediate gear fixedly disposed on the intermediate shaft. The intermediate second gear and the intermediate first gear are respectively connected to the connecting second gear and the connecting first gear, and the intermediate gear is connected to the output component.

6. The four-motor, three-speed parallel-axis electric drive bridge according to claim 5, characterized in that: The output component includes an output shaft and an output tooth fixedly disposed on the output shaft. The intermediate tooth is connected to the output tooth. The first shifting unit is fixedly disposed at the end of the connecting shaft and disposed between the connecting shaft and the output shaft. The first shifting unit switches the connection between the connecting shaft and the output shaft or disconnects it from the output shaft.

7. The four-motor, three-speed parallel-axis electric drive bridge according to claim 6, characterized in that: The output assembly also includes a differential and two half-shafts connected to the differential, the output shafts being connected to the differential housing.

8. The four-motor, three-speed parallel-axis electric drive bridge according to claim 7, characterized in that: The output assembly also includes an output planetary gear set, the sun gear of which is connected to the output shaft, and the planet carrier of which is connected to the differential housing.

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