Four-motor two-gear parallel shaft reducer integrated electric drive bridge

Abstract

The utility model provides a kind of four motor two gear parallel shaft speed reducer integrated electric drive axle.The four motor two gear parallel shaft speed reducer integrated electric drive axle includes input unit, intermediate assembly and output unit connected in turn, the input unit includes four motors, the intermediate assembly includes first intermediate shaft, second intermediate shaft and third intermediate shaft connected in turn, the first intermediate shaft is equipped with clutch mechanism, the third intermediate shaft is equipped with gear shifting mechanism, the output unit is equipped with auxiliary motor, the input unit is connected with the first intermediate shaft, and the output unit is connected with the third intermediate shaft.The four motor two gear parallel shaft speed reducer integrated electric drive axle provided by the utility model solves the problem that some electric drive axle schemes cannot meet the use requirements.

Description

Technical Field

[0001] This utility model relates to the field of electric drive bridges, specifically to an integrated electric drive bridge with a four-motor two-speed parallel shaft reducer. 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 issue that existing electric drive axle solutions cannot meet usage requirements, this utility model provides an integrated electric drive axle with a four-motor, two-speed parallel shaft reducer, which solves the aforementioned problem.

[0004] An integrated electric drive bridge with a four-motor two-speed parallel shaft reducer includes an input unit, an intermediate component, and an output unit connected in sequence. The input unit includes four motors. The intermediate component includes a first intermediate shaft, a second intermediate shaft, and a third intermediate shaft connected in sequence. The first intermediate shaft is provided with a clutch mechanism, and the third intermediate shaft is provided with a shifting mechanism. The output unit is provided with an auxiliary motor. The input unit is connected to the first intermediate shaft, and the output unit is connected to the third intermediate shaft.

[0005] In a preferred embodiment of the four-motor two-speed parallel shaft reducer integrated electric drive bridge provided by this utility model, the input unit further includes an input shaft and a connecting shaft, with each pair of motors connected to one input shaft, and two input shafts connected to one connecting shaft.

[0006] In a preferred embodiment of the four-motor two-speed parallel shaft reducer integrated electric drive bridge provided by this utility model, the first intermediate shaft is sequentially provided with a large clutch tooth, the clutch mechanism, and a small clutch tooth. The large clutch tooth is fixedly disposed on the first intermediate shaft and connected to the connecting shaft. The small clutch tooth is rotatably disposed on the first intermediate shaft and connected to the second intermediate shaft. The large clutch tooth is connected to or disconnected from the small clutch tooth through the clutch mechanism.

[0007] The second intermediate shaft is sequentially fixed with a first intermediate tooth, a second intermediate tooth, and a third intermediate tooth. The first intermediate tooth is connected to the clutch pinion, and the second and third intermediate teeth are connected to the third intermediate shaft.

[0008] The third intermediate shaft is provided with a second gear, the shifting mechanism and a first gear in sequence. The second gear and the first gear are rotatably mounted on the third intermediate shaft and are respectively connected to the second intermediate gear and the third intermediate gear. The third intermediate shaft is connected to the second gear, or to the first gear, or disconnected from it through the shifting mechanism.

[0009] In a preferred embodiment of the four-motor two-speed parallel shaft reducer integrated electric drive bridge provided by this utility model, the output unit includes a differential and a half-shaft, the third intermediate shaft is connected to the differential housing, and the half-shaft is connected to the differential. The output unit also includes an output planetary gear set, the sun gear of which is connected to the third intermediate shaft, and the planet carrier is connected to the differential housing.

[0010] Compared with existing technologies, the four-motor two-speed parallel shaft reducer integrated electric drive bridge provided by this utility model has the following beneficial effects:

[0011] 1. The solution provided by this utility model adopts a single input unit to couple the power before outputting it, which facilitates flexible power configuration and achieves high-efficiency conversion. Furthermore, the combination of multiple input motors and auxiliary output 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 design arranged on the intermediate shaft, which can select the most suitable gear according to different working conditions and optimize power output. The two-speed transmission combined with the auxiliary motor configuration at the output end has flexible operation and can further optimize the power structure, so that the mine car can maintain the best performance under different loads and speeds.

[0013] 3. The solution provided by this utility model adopts a multi-intermediate-shaft design with a clutch mechanism, which has high reliability and maintainability, simplifies daily maintenance and repair work, and reduces operating costs. The electric drive axle can operate stably in various harsh mining environments, demonstrating strong environmental adaptability. The structure is more compact, improving transmission efficiency and reducing energy waste. The overall weight is reduced, which helps improve the fuel economy and operational performance of the mining truck.

[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 a schematic diagram of a four-motor, two-speed parallel shaft reducer integrated electric drive bridge.

[0016] The following components are labeled in the diagram: Motor 11, Input Shaft 12, Connecting Shaft 13, First Intermediate Shaft 21, Clutch Large Gear 22, Clutch Small Gear 23, Clutch Mechanism 24, Second Intermediate Shaft 31, First Intermediate Gear 32, Second Intermediate Gear 33, Third Intermediate Gear 34, Third Intermediate Shaft 41, First Gear Gear 42, Second Gear Gear 43, Gear Shifting Mechanism 44, Output Planetary Gear 51, Differential 52, Half Shaft 53, Auxiliary Motor 54. 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 integrated electric drive bridge of the four-motor two-speed parallel shaft reducer provided by this utility model. It includes an input unit, intermediate components, and an output unit.

[0019] The input unit includes a motor 11, an input shaft 12, and a connecting shaft 13.

[0020] Connecting teeth are provided at both ends of the shaft of motor 11, as well as at both ends of the input shaft 12 and the connecting shaft 13. Four motors 11 are arranged side-by-side in the same direction, with an input shaft 12 between every two motors 11 and a connecting shaft 13 between every two input shafts 12, forming a four-in-two-in-one arrangement. The diameter of the connecting teeth on the input shaft 12 near the motor end is larger than that on the other end, and the diameter of the connecting teeth on the connecting shaft 13 near the input shaft 12 is also larger than that on the other end.

[0021] The intermediate components include a first intermediate shaft 21, a second intermediate shaft 31, and a third intermediate shaft 41.

[0022] The first intermediate shaft 21 is rotatably equipped with a large clutch tooth 22 and a small clutch tooth 23, with a clutch mechanism 24 between them. The large clutch tooth 22 meshes with the connecting tooth on the right end of the connecting shaft 13, and the small clutch tooth 23 is connected to the second intermediate shaft 31. By switching the clutch mechanism 24, the engagement or disengagement of the large clutch tooth 22 and the small clutch tooth 23 can be achieved.

[0023] The second intermediate shaft 31 is fixedly provided with a first intermediate tooth 32, a second intermediate tooth 33, and a third intermediate tooth 34. The diameter of the first intermediate tooth 32 is equal to the diameter of the third intermediate tooth 34, but smaller than the diameter of the second intermediate tooth 33. The first intermediate tooth 32 meshes with the clutch pinion 23, and both the second intermediate tooth 33 and the third intermediate tooth 34 are connected to the third intermediate shaft 41.

[0024] The third intermediate shaft 41 is rotatably equipped with a second gear 43 and a first gear 42, with a shifting mechanism 44 between them. The second gear 43 meshes with the second intermediate gear 33, and the first gear 42 meshes with the third intermediate gear 34. The diameter of the second gear 43 is smaller than the diameter of the first gear 42. The shifting mechanism 44 switches the third intermediate shaft 41 to either the first gear 42 or the second gear 43.

[0025] The output unit includes an output planetary gear set 51, a differential 52, half-shafts 53, and an auxiliary motor 54. The sun gear of the output planetary gear set 51 is connected to the third intermediate shaft 41, the planet carrier is connected to the outside of the differential housing 52, and the ring gear is fixed. Both half-shafts 53 are connected inside the differential 52.

[0026] The half-shaft 53 is equipped with an auxiliary motor 54 to assist braking or provide power. For ease of illustration, the attached diagram shows only the left half-shaft 53 connected. The use of an auxiliary motor at the output end is a common technique in this field and therefore does not impede the understanding and implementation of this solution by those skilled in the art.

[0027] When the shift mechanism 44 switches to connect the third intermediate shaft 41 with the first gear 42, it is in the first gear of the electric drive axle. At this time, the power generated by the input unit passes sequentially through the clutch large gear 22, clutch small gear 23, first intermediate gear 32, third intermediate gear 34, and first gear 42 to the third intermediate shaft 41. The third intermediate shaft 41 drives the sun gear of the output planetary gear set 51, which in turn drives the planet carrier of the output planetary gear set 51 to drive the differential 52, and finally distributes the power to the two half shafts 53.

[0028] When the shift mechanism 44 switches to engage the third intermediate shaft 41 with the second gear 43, it is in second gear of the electric drive axle. At this time, the power generated by the input unit passes sequentially through the clutch large gear 22, clutch small gear 23, first intermediate gear 32, second intermediate gear 33, and second gear 43 to the third intermediate shaft 41. The third intermediate shaft 41 drives the sun gear of the output planetary gear set 51, which in turn drives the planet carrier of the output planetary gear set 51 to drive the differential 52, and finally distributes the power to the two half shafts 53.

[0029] 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, two-speed parallel shaft reducer integrated electric drive bridge, characterized in that: The device includes an input unit, an intermediate component, and an output unit connected in sequence. The input unit includes four motors. The intermediate component includes a first intermediate shaft, a second intermediate shaft, and a third intermediate shaft connected in sequence. The first intermediate shaft is equipped with a clutch mechanism, and the third intermediate shaft is equipped with a shifting mechanism. The output unit is equipped with an auxiliary motor. The input unit is connected to the first intermediate shaft, and the output unit is connected to the third intermediate shaft.

2. The four-motor two-speed parallel shaft reducer integrated electric drive bridge according to claim 1, characterized in that: The input unit further includes an input shaft and a connecting shaft, with each pair of motors connected to one input shaft and two input shafts connected to one connecting shaft.

3. The four-motor two-speed parallel shaft reducer integrated electric drive bridge according to claim 2, characterized in that: The first intermediate shaft is provided with a large clutch tooth, the clutch mechanism, and a small clutch tooth in sequence. The large clutch tooth is fixedly disposed on the first intermediate shaft and connected to the connecting shaft. The small clutch tooth is rotatably disposed on the first intermediate shaft and connected to the second intermediate shaft. The large clutch tooth is connected to or disconnected from the small clutch tooth through the clutch mechanism.

4. The four-motor two-speed parallel shaft reducer integrated electric drive bridge according to claim 3, characterized in that: The second intermediate shaft is sequentially fixed with a first intermediate tooth, a second intermediate tooth, and a third intermediate tooth. The first intermediate tooth is connected to the clutch pinion, and the second and third intermediate teeth are connected to the third intermediate shaft.

5. The four-motor two-speed parallel shaft reducer integrated electric drive bridge according to claim 4, characterized in that: The third intermediate shaft is provided with a second gear, the shifting mechanism and a first gear in sequence. The second gear and the first gear are rotatably mounted on the third intermediate shaft and are respectively connected to the second intermediate gear and the third intermediate gear. The third intermediate shaft is connected to the second gear, or to the first gear, or disconnected from it through the shifting mechanism.

6. The four-motor two-speed parallel shaft reducer integrated electric drive bridge according to claim 5, characterized in that: The output unit includes a differential and a half-shaft, the third intermediate shaft is connected to the differential housing, and the half-shaft is connected to the differential.

7. The four-motor two-speed parallel shaft reducer integrated electric drive bridge according to claim 6, characterized in that: The output unit also includes an output planetary gear set, the sun gear of which is connected to the third intermediate shaft, and the planet carrier is connected to the differential housing.

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