Electric driving system

Abstract

The utility model provides an electric drive system which comprises a first drive motor system, and an output shaft of the first drive motor system is selectively connected with a first reduction gear pair through a first clutch assembly. An output shaft of the second driving motor system is selectively connected with the second reduction gear pair through a second clutch assembly; the output ends of the first reduction gear pair and the second reduction gear pair are connected with the output shaft; an output shaft of the first gear shifting motor is connected with a first gear shifting hub, and the first gear shifting hub is connected with a first clutch assembly; an output shaft of the second gear shifting motor is connected with a second gear shifting hub, and the second gear shifting hub is connected with a second clutch assembly; different corner positions of the first gear shifting hub correspond to different joint positions of the first clutch assembly; different corner positions of the second gear shifting hub correspond to different joint positions of the second clutch assembly; the two gear shifting motors drive the two gear shifting hubs to serve as actuators, and four-gear operation of the whole system is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of power drive systems, and particularly relates to an electric drive system. Background Art

[0002] With the continuous development of electric drive technology for mining trucks, multi-motor and multi-gear drive have gradually become the mainstream of technology. However, the current configurations mostly use a single shifting motor to drive a shift fork for control, which requires multiple shift forks and shifting motors in a shifting system. Multiple actuating components will increase the components of the system, increasing the cost and also increasing the possibility of electrical failures.

[0003] For the existing multi-motor series AMT solution, although the shifting components are reduced, there is a unique power interruption characteristic that makes it difficult to apply to mining scenarios.

[0004] Therefore, there is an urgent need to provide an electric drive system to solve the defects and deficiencies existing in the prior art. Summary of the Utility Model

[0005] In order to solve the defects and deficiencies existing in the prior art, the utility model provides an electric drive system.

[0006] The technical solution provided by the utility model is as follows:

[0007] An electric drive system, characterized in that: the electric drive system includes

[0008] A first drive motor system, the output shaft of the first drive motor system is selectively connected to a first reduction gear pair through a first clutch assembly;

[0009] A second drive motor system, the output shaft of the second drive motor system is selectively connected to a second reduction gear pair through a second clutch assembly;

[0010] The output ends of the first reduction gear pair and the second reduction gear pair are connected to an output shaft;

[0011] A first shifting motor, the output shaft of the first shifting motor is connected to a first shifting hub, and the first shifting hub is connected to the first clutch assembly;

[0012] A second shifting motor, the output shaft of the second shifting motor is connected to a second shifting hub, and the second shifting hub is connected to the second clutch assembly;

[0013] Different angular positions of the first shifting hub correspond to different engagement positions of the first clutch assembly;

[0014] Different angular positions of the second shifting hub correspond to different engagement positions of the second clutch assembly.

[0015] As a further preferred embodiment of the present utility model,

[0016] The first drive motor system includes a first motor and a first motor controller connected to each other. After receiving a control instruction, the first motor controller controls the first motor to output a corresponding torque;

[0017] The second drive motor system includes a second motor and a second motor controller connected to each other. After receiving a control instruction, the second motor controller controls the second motor to output a corresponding torque.

[0018] As a further preferred embodiment of the present utility model,

[0019] Both the first drive motor system and the first drive motor system can work independently to output corresponding torques.

[0020] As a further preferred embodiment of the present utility model,

[0021] The first reduction gear pair includes a correspondingly arranged first reduction gear and a second reduction gear, and a correspondingly arranged third reduction gear and a fourth reduction gear;

[0022] The second reduction gear pair includes a correspondingly arranged fifth reduction gear and a sixth reduction gear, and a correspondingly arranged seventh reduction gear and an eighth reduction gear.

[0023] As a further preferred embodiment of the present utility model,

[0024] The first clutch assembly includes a first clutch and a second clutch, wherein,

[0025] The first clutch is located between the first reduction gear and the second reduction gear to selectively engage with or be in the middle position relative to the first reduction gear and the second reduction gear on both sides;

[0026] The second clutch is located between the third reduction gear and the fourth reduction gear to selectively engage with or be in the middle position relative to the third reduction gear and the fourth reduction gear on both sides;

[0027] The second clutch assembly includes a third clutch and a fourth clutch, wherein,

[0028] The third clutch is located between the fifth reduction gear and the sixth reduction gear to selectively engage with or be in the middle position relative to the fifth reduction gear and the sixth reduction gear on both sides;

[0029] The fourth clutch is located between the seventh reduction gear and the eighth reduction gear to selectively engage with or be in the middle position relative to the seventh reduction gear and the eighth reduction gear on both sides.

[0030] As a further preferred embodiment of the present utility model,

[0031] Both the first clutch assembly and the second clutch assembly are selected as dog clutches.

[0032] As a further preferred embodiment of the present utility model,

[0033] The output shaft of the first shift motor is coaxially arranged with the first shift hub;

[0034] The output shaft of the second shift motor is coaxially arranged with the second shift hub.

[0035] As a further preferred embodiment of the present utility model, during the rotation of the first shift hub and the second shift hub, each angle corresponds to only one gear position.

[0036] As a further preferred embodiment of the present utility model, the relationship between the rotation angles of the first shift hub and the second shift hub and the corresponding gear positions satisfies:

[0037] First shift hub: 1st gear → 2nd gear → neutral position → neutral position;

[0038] Second shift hub: neutral position → neutral position → 3rd gear → 4th gear;

[0039] As a further preferred embodiment of the present utility model, both the first shift hub and the second shift hub can directly shift from the 4th gear to the 1st gear.

[0040] Compared with the prior art, the beneficial effects achieved by the present utility model include:

[0041] (1) The present utility model provides an electric drive system. By driving two shift hubs with two shift motors as actuators, four - gear operation of the whole system is realized.

[0042] (2) The present utility model provides an electric drive system, which can realize combined drive of two motors, and the two motors can shift gears freely, with flexible gear shifting and wide application range.

[0043] (3) The present utility model provides an electric drive system, and the torque distribution of the system is flexible, which can realize dual - motor and single - motor drive.

[0044] (4) The present utility model provides an electric drive system. Both the first shift hub and the second shift hub can directly shift from the 4th gear to the 1st gear to run, improving the gear - shifting efficiency and safety performance in case of emergency. Brief Description of the Drawings

[0045] Figure 1 It is a schematic logical structure diagram of the present utility model.

[0046] Figure 2This is a schematic structural diagram of the clutch assembly of the present utility model.

[0047] Figure 3 This is a corresponding relationship diagram between the rotation angle of the shift hub and the gear positions of the present utility model.

[0048] Figure 4 This is a schematic structural diagram of the shift hub of the present utility model when skipping gears. Detailed implementation manners

[0049] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0050] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0051] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. 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 directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0052] [First Embodiment]

[0053] As Figure 1 shown, a kind of electric drive system provided by the first embodiment of the present utility model includes

[0054] A first drive motor system, the output shaft of the first drive motor system is selectively connected to a first reduction gear pair through a first clutch assembly; the first drive motor system in this embodiment includes a first motor and a first motor controller connected to each other, and the first motor controller controls the first motor to output a corresponding torque after receiving a control instruction;

[0055] The second drive motor system, the output shaft of the second drive motor system is selectively connected to the second reduction gear pair through the second clutch assembly; the second drive motor system in this embodiment includes a second motor and a second motor controller connected to each other, and the second motor controller controls the second motor to output a corresponding torque after receiving a control instruction;

[0056] Both the first drive motor system and the first drive motor system can work independently to output corresponding torques, or can achieve combined drive of two motors, with flexible torque distribution and a wide range of applicable working conditions;

[0057] In this embodiment, as Figure 1 shown,

[0058] The first reduction gear pair includes a correspondingly arranged first reduction gear and a second reduction gear, and a correspondingly arranged third reduction gear and a fourth reduction gear;

[0059] The second reduction gear pair includes a correspondingly arranged fifth reduction gear and a sixth reduction gear, and a correspondingly arranged seventh reduction gear and an eighth reduction gear;

[0060] And the output ends of the first reduction gear pair and the second reduction gear pair are connected to the output shaft;

[0061] The first clutch assembly includes a first clutch and a second clutch, wherein,

[0062] The first clutch is located between the first reduction gear and the second reduction gear to selectively engage or be in the middle position with the first reduction gear and the second reduction gear on both sides;

[0063] The second clutch is located between the third reduction gear and the fourth reduction gear to selectively engage or be in the middle position with the third reduction gear and the fourth reduction gear on both sides;

[0064] The second clutch assembly includes a third clutch and a fourth clutch, wherein,

[0065] The third clutch is located between the fifth reduction gear and the sixth reduction gear to selectively engage or be in the middle position with the fifth reduction gear and the sixth reduction gear on both sides;

[0066] The fourth clutch is located between the seventh reduction gear and the eighth reduction gear to selectively engage or be in the middle position with the seventh reduction gear and the eighth reduction gear on both sides.

[0067] Preferably, as Figure 2 shown, both the first clutch assembly and the second clutch assembly in this embodiment are selected as dog clutch; the dog clutch is controlled by the corresponding shift hub to achieve engagement and separation, so as to realize the tooth engagement and tooth withdrawal actions of two gears during operation;

[0068] The first shifting motor, the output shaft of the first shifting motor is connected to the first shifting hub, and the first shifting hub is connected to the first clutch assembly; the output shaft of the first shifting motor is coaxially arranged with the first shifting hub, and the first shifting motor outputs power to drive the first shifting hub to rotate so as to realize the shifting control of the first reduction gear pair;

[0069] The second shifting motor, the output shaft of the second shifting motor is connected to the second shifting hub, and the second shifting hub is connected to the second clutch assembly; the output shaft of the second shifting motor is coaxially arranged with the second shifting hub, and the second shifting motor outputs power to drive the second shifting hub to rotate so as to realize the shifting control of the second reduction gear pair;

[0070] Different angular positions of the first shifting hub correspond to different engagement positions of the first clutch assembly;

[0071] Different angular positions of the second shifting hub correspond to different engagement positions of the second clutch assembly;

[0072] It should be noted that during the rotation of the first shifting hub and the second shifting hub in this embodiment, each angle corresponds to only one gear position. Such a setting can avoid the gear position disorder caused by one shifting hub meshing with two gears at the same time.

[0073] As Figure 3 shown, specifically, in this embodiment, the relationship between the rotation angles of the first shifting hub and the second shifting hub and the corresponding gear positions satisfies:

[0074] First shifting hub: 1st gear → 2nd gear → neutral position → neutral position;

[0075] Second shifting hub: neutral position → neutral position → 3rd gear → 4th gear;

[0076] In addition, both the first shifting hub and the second shifting hub in this embodiment can directly shift from the 4th gear to the 1st gear, which can be achieved by connecting the positions of the 1st gear and the 4th gear in the shifting hub. In this way, during the shifting control process of the system, it can shift from the 1st gear to the highest gear 4th gear in sequence, and when the vehicle encounters emergency situations such as sudden braking, the vehicle can also directly switch from the 4th gear to the 1st gear to achieve shifting, thereby improving the shifting efficiency and safety performance in emergency situations.

[0077] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. An electric drive system, characterized in that: The electric drive system includes a first drive motor system, the output shaft of which is selectively connectable to the first reduction gear pair via a first clutch assembly; a second drive motor system, the output shaft of which is selectively connectable to the second reduction gear pair via a second clutch assembly; The output ends of the first reduction gear pair and the second reduction gear pair are connected to the output shaft; a first shift motor, wherein an output shaft of the first shift motor is connected to a first shift hub, and the first shift hub is connected to a first clutch assembly; a second shift motor, wherein an output shaft of the second shift motor is connected to a second shift hub, and the second shift hub is connected to a second clutch assembly; Different rotational angle positions of the first shift hub correspond to different engagement positions of the first clutch assembly; Different rotational angle positions of the second shift hub correspond to different engagement positions of the second clutch assembly.

2. An electric drive system according to claim 1, characterized in that: The first drive motor system includes a first motor and a first motor controller connected to each other, and the first motor controller controls the first motor to output a corresponding torque after receiving a control instruction; The second drive motor system includes a second motor and a second motor controller that are connected to each other. The second motor controller controls the second motor to output a corresponding torque after receiving a control instruction.

3. An electric drive system according to claim 1, characterized in that: Both the first drive motor system and the second drive motor system can work independently to output corresponding torque.

4. The electric drive system according to claim 1, characterized in that: The first reduction gear pair includes a first reduction gear and a second reduction gear that are correspondingly arranged, and a third reduction gear and a fourth reduction gear that are correspondingly arranged; The second reduction gear pair includes a fifth reduction gear and a sixth reduction gear that are correspondingly arranged, and a seventh reduction gear and an eighth reduction gear that are correspondingly arranged.

5. An electric drive system according to claim 4, characterized in that: The first clutch assembly includes a first clutch and a second clutch, wherein: The first clutch is located between the first reduction gear and the second reduction gear to selectively engage with the first reduction gear and the second reduction gear on both sides or be located in a neutral position; The second clutch is located between the third reduction gear and the fourth reduction gear to selectively engage with the third reduction gear and the fourth reduction gear on both sides or be located in a neutral position; The second clutch assembly includes a third clutch and a fourth clutch, wherein: The third clutch is located between the fifth reduction gear and the sixth reduction gear to selectively engage with the fifth reduction gear and the sixth reduction gear on both sides or be located in a neutral position; The fourth clutch is located between the seventh reduction gear and the eighth reduction gear to selectively engage with the seventh reduction gear and the eighth reduction gear on both sides or be located in a neutral position.

6. The electric drive system according to claim 1, characterized in that: The first clutch assembly and the second clutch assembly are both dog clutches.

7. The electric drive system according to claim 1, characterized in that: The output shaft of the first shift motor is coaxially arranged with the first shift hub; The output shaft of the second shift motor is coaxially arranged with the second shift hub.

8. The electric drive system according to claim 1, characterized in that: During the rotation of the first shift hub and the second shift hub, each angle corresponds to only one gear position.

9. An electric drive system according to claim 8, characterized in that: The relationship between the rotation angle of the first shift hub and the second shift hub and the corresponding gear position satisfies: First shift hub: 1st gear → 2nd gear → middle position → middle position; Second shift hub: neutral position → neutral position → 3rd gear → 4th gear.

10. The electric drive system according to claim 1, characterized in that: The first shift hub and the second shift hub can both realize direct shifting from the 4th gear to the 1st gear.

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