A drive system

Abstract

The utility model provides a kind of drive system, including first motor and second motor, the first motor output shaft of first motor is connected first input shaft by first motor input gear pair;The second motor output shaft of second motor is connected second input shaft by second motor input gear pair.The utility model adopts high-speed double motor parallel structure, gearbox adopts two double intermediate shaft parallel structure, and the bearing capacity is strong, and reliability is high, and axial dimension is short, solve the problem of excessive length of axial dimension caused by low-speed large torque motor series connection.Output flange has two position selections, can be flexibly selected according to whole vehicle space, is conducive to whole vehicle arrangement.

Description

Technical Field

[0001] This utility model relates to the technical field of pure electric dual-motor multi-gear transmission drive system, specifically to a drive system. Background Technology

[0002] In the heavy-duty truck sector, the pursuit of higher torque is driven by the need to reduce costs and increase efficiency. In the new energy vehicle sector, this typically involves using low-speed, high-torque motors and increasing the number of motors to improve the output torque of the drive system. However, low-speed, high-torque motors are relatively large and generally require a series connection, resulting in an excessively long drive system that is inconvenient for vehicle layout; they are also heavy, hindering overall vehicle weight reduction.

[0003] Therefore, there is an urgent need to provide a driving system to address the defects and shortcomings of the existing technology. Summary of the Invention

[0004] In order to overcome the defects and shortcomings of the existing technology, this utility model provides a driving system.

[0005] The technical solution provided by this utility model is as follows: a driving system, the system comprising: The first motor, wherein the first motor output shaft of the first motor is connected to the first input shaft via a first motor input gear pair; The second motor, the output shaft of the second motor is connected to the second input shaft through the second motor input gear pair; The first input shaft is connected to the first intermediate shaft and the first second intermediate shaft via the first input gear pair, and the first intermediate shaft and the first second intermediate shaft are connected to the first output shaft via the first output gear pair. The second input shaft is connected to the second first intermediate shaft and the second second intermediate shaft via the second input gear pair, and the second first intermediate shaft and the second second intermediate shaft are connected to the second output shaft via the second output gear pair. A first shifting device is disposed on a first output shaft to selectively engage the first output shaft with a gear of a first output gear pair on one side, or directly engage it with a first input shaft on the other side, or be in a neutral position; The second shifting device is disposed on the second output shaft to selectively engage the second output shaft with the gear of the second output gear pair on one side, or directly engage it with the second input shaft on the other side, or be in the neutral position.

[0006] Furthermore, the first motor input gear pair includes a first motor input driving gear fixedly connected to the first motor output shaft and a first motor input driven gear fixedly connected to the first input shaft, wherein the first motor input driving gear and the first motor input driven gear mesh accordingly; The second motor input gear pair includes a second motor input driving gear fixedly connected to the output shaft of the second motor and a second motor input driven gear fixedly connected to the second input shaft, wherein the second motor input driving gear and the second motor input driven gear mesh accordingly.

[0007] Furthermore, the first input gear pair includes a first input driving gear fixedly connected to the first input shaft, a first input driven gear fixedly connected to the first intermediate shaft, and a first and second input driven gear fixedly connected to the first and second intermediate shafts. The first input driving gear meshes with the first input driven gear and the first and second input driven gear respectively. The second input gear pair includes a second input driving gear fixedly connected to the second input shaft, a second input driven gear fixedly connected to the second intermediate shaft, and a second input driven gear fixedly connected to the second intermediate shaft. The second input driving gear meshes with the second input driven gear and the second input driven gear respectively.

[0008] Furthermore, the first output gear pair includes a first output driving gear fixedly connected to a first intermediate shaft, a first second output driving gear fixedly connected to a first second intermediate shaft, and a first output driven gear movably sleeved on the first output shaft. The first first output driving gear and the first second output driving gear respectively mesh with the first output driven gear. The second output gear pair includes a second output driving gear fixedly connected to the second intermediate shaft, a second output driving gear fixedly connected to the second intermediate shaft, and a second output driven gear movably sleeved on the second output shaft. The second output driving gear and the second output driving gear respectively mesh with the second output driven gear.

[0009] Furthermore, the first output shaft is connected to the second output shaft via an output transmission gear pair, and an output flange is connected to either the first or second output shaft.

[0010] Furthermore, the first input shaft and the first output shaft are coaxially arranged, and the first intermediate shaft and the first second intermediate shaft are symmetrically distributed on both sides of the first input shaft and the first output shaft; Furthermore, the second input shaft and the second output shaft are coaxially arranged, and the second first intermediate shaft and the second second intermediate shaft are symmetrically distributed on both sides of the second input shaft and the second output shaft.

[0011] Furthermore, the first motor and the second motor are symmetrically distributed on both sides of the center position of the distance between the axes of the first output shaft and the second output shaft, and the first motor and the second motor can output power individually or together.

[0012] Furthermore, both the first and second shifting devices utilize shifting sleeves.

[0013] The beneficial effects of this utility model compared to the prior art are as follows: 1) This utility model provides a drive system that adopts a high-speed dual-motor parallel structure, which solves the problem of excessive axial length caused by low-speed, high-torque motors connected in series.

[0014] 2) This utility model provides a drive system in which the gearbox adopts a parallel structure of two double intermediate shafts, which has strong load-bearing capacity, high reliability, and short axial dimension, which is beneficial to the overall vehicle layout.

[0015] 3) This utility model provides a drive system that, by adopting a dual-motor parallel connection and a dual intermediate shaft parallel connection structure for the gearbox, is lightweight and has a balanced mass distribution, which is beneficial to the lightweighting of the whole vehicle and the overall layout.

[0016] 4) This invention provides a drive system in which the output flange can be positioned on either the second output shaft or the first output shaft, depending on the vehicle's available space. The output flange has two position options, allowing for flexible selection based on the vehicle's space, which is beneficial for overall vehicle layout.

[0017] 5) This invention provides a drive system that can select a dual-motor working mode or a single-motor working mode according to actual working conditions, so that the motor can work in the high-efficiency range as much as possible, thereby improving system efficiency and reducing energy consumption.

[0018] 6) The present invention provides a drive system in which the first input gear pair connected to each motor has a difference in the number of teeth, so that the order of the transmission chain gears corresponding to each motor is staggered, which can effectively avoid NVH problems such as resonance and noise. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model.

[0020] Figure label: First motor EM1, first motor output shaft S11, first motor input gear pair EGR1, first motor input driving gear GE11, first motor input driven gear GE12, first input shaft S12, first intermediate shaft S13, first second intermediate shaft S14, first output shaft S15, first shifting device C1; First motor input gear pair GR11, first motor input driving gear G111, first input driven gear G112, first second input driven gear G113; first output gear pair GR12, first output driven gear G121, first first output driving gear G122, first second output driving gear G123; Second motor EM2, second motor output shaft S21, second motor input gear pair EGR2, second motor input driving gear GE21, second motor input driven gear GE22, second input shaft S22, second intermediate shaft S23, second intermediate shaft S24, second output shaft S25, second shifting device C2; Second motor input gear pair GR21, second motor input driving gear G211, second first input driven gear G212, second second input driven gear G213; second output gear pair GR22, second output driven gear G221, second first output driving gear G222, second second output driving gear G223; Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] [First Embodiment] like Figure 1 The image shows a first embodiment of a drive system provided by this utility model. The system includes: The first motor EM1 has its first motor output shaft S11 connected to the first input shaft S12 via the first motor input gear pair EGR1; thus, the output power of the first motor EM1 can be transmitted to the first input shaft S12 sequentially via the first motor output shaft S11 and the first motor input gear pair EGR1. In this embodiment, the first motor input gear pair EGR1 includes a first motor input driving gear GE11 fixedly connected to the first motor output shaft S11 and a first motor input driven gear GE12 fixedly connected to the first input shaft S12. The first motor input driving gear GE11 and the first motor input driven gear GE12 mesh with each other. The second motor EM2 has its output shaft S21 connected to the second input shaft S22 via the second motor input gear pair EGR2; thus, the output power of the second motor EM2 can be transmitted to the second input shaft S22 sequentially via the second motor output shaft S21 and the second motor input gear pair EGR2. In this embodiment, the second motor input gear pair EGR2 includes a second motor input driving gear GE21 fixedly connected to the second motor output shaft S21 and a second motor input driven gear GE22 fixedly connected to the second input shaft S22. The second motor input driving gear GE21 and the second motor input driven gear GE22 mesh with each other.

[0025] In this embodiment, the first motor EM1 and the second motor EM2 are symmetrically distributed on both sides of the center position of the distance between the axes of the first output shaft S15 and the second output shaft S25. By adopting a high-speed dual-motor parallel structure, the problem of excessive axial length caused by low-speed, high-torque motors connected in series is solved. Furthermore, the first motor EM1 and the second motor EM2 can output power individually or together to meet the driving requirements under different driving conditions.

[0026] The first motor EM1 and the second motor EM2 can also be regarded as two sets of motors, that is, each set of motors consists of two motors.

[0027] The first input shaft S12 is connected to the first intermediate shaft S13 and the first second intermediate shaft S14 via the first input gear pair GR11, or directly connected to the first output shaft S15; the power of the first input shaft S12 can be transmitted to the first intermediate shaft S13 and the first second intermediate shaft S14 via the first input gear pair GR11, or directly to the first output shaft S15. Preferably, in this embodiment, the first input gear pair GR11 includes a first input driving gear G111 fixedly connected to the first input shaft S12, a first input driven gear G112 fixedly connected to the first intermediate shaft S13, and a first second input driven gear G113 fixedly connected to the first second intermediate shaft S14. The first input driving gear G111 meshes with the first first input driven gear G112 and the first second input driven gear G113 respectively. The second input shaft S22 is connected to the second first intermediate shaft S23 and the second second intermediate shaft S24 via the second input gear pair GR21, or directly connected to the second output shaft S25; the power of the second input shaft S22 can be transmitted to the second first intermediate shaft S23 and the second second intermediate shaft S24 via the second input gear pair GR21, or directly transmitted to the second output shaft S25. Preferably, in this embodiment, the second input gear pair GR21 includes a second input driving gear G211 fixedly connected to the second input shaft S22, a second input driven gear G212 fixedly connected to the second intermediate shaft S23, and a second input driven gear G213 fixedly connected to the second intermediate shaft S24. The second input driving gear G211 meshes with the second input driven gear G212 and the second input driven gear G213 respectively. The first intermediate shaft S13 and the first second intermediate shaft S14 are respectively connected to the first output shaft S15 via the first output gear pair GR12; so as to transmit the power of the first intermediate shaft S13 and the first second intermediate shaft S14 to the first output shaft S15. The first output gear pair GR12 includes a first output driving gear G122 fixedly connected to the first intermediate shaft S13, a first second output driving gear G123 fixedly connected to the first second intermediate shaft S14, and a first output driven gear G121 movably sleeved on the first output shaft S15. The first output driving gear G122 and the first second output driving gear G123 respectively mesh with the first output driven gear G121. The second intermediate shaft S23 and the second intermediate shaft S24 are respectively connected to the second output shaft S25 via the second output gear pair GR22; so as to transmit the power of the second intermediate shaft S23 and the second intermediate shaft S24 to the second output shaft S25. The second output gear pair GR22 includes a second output driving gear G222 fixedly connected to the second intermediate shaft S23, a second output driving gear G223 fixedly connected to the second intermediate shaft S24, and a second output driven gear G221 movably sleeved on the second output shaft S25. The second output driving gear G222 and the second output driving gear G223 respectively mesh with the second output driven gear G221. like Figure 1As shown, in this embodiment, the first output shaft S15 is connected to the second output shaft S25 via the output transmission gear pair GR0. The second output shaft S25 is connected to the output flange G0. The output power of the first output shaft S15 is merged into the second output shaft S25 through the output transmission gear pair GR0, and finally transmitted to the output flange G0 to realize power output.

[0028] Conversely, the output flange G0 can be set on the first output shaft S15, and the output power of the second output shaft S25 can be merged into the first output shaft S15 through the output transmission gear pair GR0, and finally transmitted to the output flange G0 to realize power output.

[0029] In this embodiment, as Figure 1 As shown: The first input shaft S12 and the first output shaft S15 are coaxially arranged, and the first intermediate shaft S13 and the first second intermediate shaft S14 are symmetrically distributed on both sides of the first input shaft S12 and the first output shaft S15. The second input shaft S22 and the second output shaft S25 are coaxially arranged, and the second intermediate shaft S23 and the second intermediate shaft S24 are symmetrically distributed on both sides of the second input shaft S22 and the second output shaft S25.

[0030] By adopting a transmission structure with two parallel intermediate shafts, the vehicle has strong load-bearing capacity, high reliability, and short axial dimension, which is beneficial to the overall vehicle layout. At the same time, the drive system is lightweight and has a balanced mass distribution, which is beneficial to the overall vehicle weight reduction and layout.

[0031] This embodiment also includes several shifting devices, and both the first shifting device C1 and the second shifting device C2 are shifting sleeves. The first shifting device C1 is disposed on the first output shaft S15 to selectively engage the first output shaft S15 with the gear of the first output gear pair on one side, or directly engage with the first input shaft S12 on the other side, or be in the middle position; The second gear shifting device C2 is disposed on the second output shaft S25 to selectively engage the second output shaft S25 with the gear of the second output gear pair on one side, or directly engage with the second input shaft S22 on the other side, or be in the neutral position.

[0032] Those skilled in the art should know that this embodiment uses the above two shifting strategies as examples, but the drive system provided in this embodiment is not limited to using only these two shifting strategies for the corresponding shifting process.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A drive system characterized by: The system includes: The first motor (EM1) has its first motor output shaft (S11) connected to the first input shaft (S12) via the first motor input gear pair (EGR1). The second motor (EM2) has its second motor output shaft (S21) connected to the second input shaft (S22) via the second motor input gear pair (EGR2). The first input shaft (S12) is connected to the first intermediate shaft (S13) and the first second intermediate shaft (S14) via the first input gear pair (GR11), and the first intermediate shaft (S13) and the first second intermediate shaft (S14) are connected to the first output shaft (S15) via the first output gear pair (GR12). The second input shaft (S22) is connected to the second first intermediate shaft (S23) and the second second intermediate shaft (S24) via the second input gear pair (GR21), and the second first intermediate shaft (S23) and the second second intermediate shaft (S24) are connected to the second output shaft (S25) via the second output gear pair (GR22). The first shifting device (C1) is disposed on the first output shaft (S15) to selectively engage the first output shaft (S15) with the gear of the first output gear pair (GR12) on one side, or directly engage with the first input shaft (S12) on the other side, or be in the middle position; The second shifting device (C2) is disposed on the second output shaft (S25) to selectively engage the second output shaft (S25) with the gear of the second output gear pair (GR22) on one side, or directly engage with the second input shaft (S22) on the other side, or be in the neutral position.

2. The drive system according to claim 1, characterized in that: The first motor input gear pair (EGR1) includes a first motor input driving gear (GE11) fixedly connected to the first motor output shaft (S11) and a first motor input driven gear (GE12) fixedly connected to the first input shaft (S12). The first motor input driving gear (GE11) and the first motor input driven gear (GE12) mesh with each other. The second motor input gear pair (EGR2) includes a second motor input driving gear (GE21) fixedly connected to the second motor output shaft (S21) and a second motor input driven gear (GE22) fixedly connected to the second input shaft (S22). The second motor input driving gear (GE21) and the second motor input driven gear (GE22) mesh with each other.

3. The drive system according to claim 1, characterized in that: The first input gear pair (GR11) includes a first input driving gear (G111) fixedly connected to the first input shaft (S12), a first input driven gear (G112) fixedly connected to the first intermediate shaft (S13), and a first second input driven gear (G113) fixedly connected to the first second intermediate shaft (S14). The first input driving gear (G111) meshes with the first first input driven gear (G112) and the first second input driven gear (G113) respectively. The second input gear pair (GR21) includes a second input driving gear (G211) fixedly connected to the second input shaft (S22), a second input driven gear (G212) fixedly connected to the second intermediate shaft (S23), and a second input driven gear (G213) fixedly connected to the second intermediate shaft (S24). The second input driving gear (G211) meshes with the second input driven gear (G212) and the second input driven gear (G213) respectively.

4. The drive system according to claim 1, characterized in that: The first output gear pair (GR12) includes a first output driving gear (G122) fixedly connected to the first intermediate shaft (S13), a first second output driving gear (G123) fixedly connected to the first second intermediate shaft (S14), and a first output driven gear (G121) movably sleeved on the first output shaft (S15). The first output driving gear (G122) and the first second output driving gear (G123) respectively mesh with the first output driven gear (G121). The second output gear pair (GR22) includes a second output driving gear (G222) fixedly connected to the second intermediate shaft (S23), a second output driving gear (G223) fixedly connected to the second intermediate shaft (S24), and a second output driven gear (G221) movably sleeved on the second output shaft (S25). The second output driving gear (G222) and the second output driving gear (G223) respectively mesh with the second output driven gear (G221).

5. The drive system of claim 1, wherein: The first output shaft (S15) is connected to the second output shaft (S25) via an output transmission gear pair (GR0), and an output flange is connected to either the first output shaft (S15) or the second output shaft (S25).

6. A drive system according to claim 1, characterized in that: The first input shaft (S12) and the first output shaft (S15) are coaxially arranged, and the first intermediate shaft (S13) and the first second intermediate shaft (S14) are symmetrically distributed on both sides of the first input shaft (S12) and the first output shaft (S15).

7. A drive system according to claim 1, characterized in that: The second input shaft (S22) and the second output shaft (S25) are coaxially arranged, and the second intermediate shaft (S23) and the second intermediate shaft (S24) are symmetrically distributed on both sides of the second input shaft (S22) and the second output shaft (S25).

8. The drive system of claim 1, wherein: The first motor (EM1) and the second motor (EM2) are symmetrically distributed on both sides of the center position of the distance between the axes of the first output shaft (S15) and the second output shaft (S25), and the first motor (EM1) and the second motor (EM2) can output power individually or together.

9. The drive system of claim 1, wherein: Both the first shifting device (C1) and the second shifting device (C2) use shifting sleeves.

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