Electric drive system and automobile

Abstract

The invention provides an electric drive system and an automobile, and relates to the field of electric drive system structures. The electric driving system comprises a power part used for driving a driving shaft to rotate; the axis of the power output end of the power part is collinear with the axis of the driving shaft; and the all-in-one controller is arranged at the side part of the power part. The axis of the power output end of the power part is arranged to be collinear with the axis of the driving shaft, so that large space can be saved, the all-in-one controller can be arranged on the side wall of the power part, the space occupied by the electric drive system in the height direction is effectively reduced, and the service life of the electric drive system is prolonged. And the compactness and the arrangement flexibility of the electric drive system can be improved. In addition, the electric drive system can be arranged on the front drive of the automobile and can also be arranged on the rear drive of the automobile.

Description

Technical Field

[0001] The present application relates to the field of electric drive system structure, and in particular to an electric drive system and a car. Background Art

[0002] In new energy vehicles, the power battery system, electric drive system, power supply system, distribution system, etc. are all core components of electric vehicles. Among them, the more common electric vehicle drive system (i.e. the above-mentioned electric drive system) is mainly a three-in-one drive system, which consists of three components: a drive motor, an all-in-one controller and a reducer.

[0003] Existing electric drive systems all adopt parallel shaft layout solutions (such as Figure 1 to Figure 2 As shown in the figure, the power output end of the drive motor is parallel to the drive shaft, and due to the structure of the drive shaft, the drive motor and the reducer, the all-in-one controller can only be arranged above the drive motor and the reducer, which will cause the existing electric drive system to occupy a larger space in the Z direction (i.e., the height direction). Therefore, when the electric drive system is arranged in the rear drive of the car, it will affect the utilization rate of the trunk space of the whole vehicle, and it is difficult to take into account the front and rear drive arrangements of the whole vehicle. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide an electric drive system and a car to solve the problem that the electric drive system in the existing car occupies a large space in the height direction.

[0005] According to the above objective, a first aspect of the present invention provides an electric drive system, wherein the electric drive system comprises:

[0006] A power unit, used to drive the drive shaft to rotate; the axis of the power output end of the power unit is colinear with the axis of the drive shaft; and

[0007] The all-in-one controller is arranged on the side of the power unit.

[0008] Preferably, the power unit includes a driving motor and a reducer connected to the driving motor.

[0009] Preferably, the drive motor is provided with a rotor shaft, which is formed as a hollow shaft and sleeved on the outer side of the drive shaft so that the rotor shaft can rotate relative to the drive shaft; the axis of the rotor shaft is colinear with the axis of the drive shaft.

[0010] Preferably, the rotor shaft extends to the outside of the drive motor, and one end of the rotor shaft away from the drive motor is formed as a power output end of the drive motor.

[0011] Preferably, the reducer is connected to the rotor shaft.

[0012] Preferably, the reducer comprises a first gear and a second gear meshing with each other, and the first gear is sleeved on the outer side of the rotor shaft so as to be able to rotate synchronously with the rotor shaft.

[0013] Preferably, the reducer further includes a transmission shaft arranged parallel to the drive shaft, and the second gear is sleeved on an outer side of the transmission shaft.

[0014] Preferably, the reducer further includes a third gear and a fourth gear meshing with each other, the third gear is sleeved on the outer side of the transmission shaft, and the fourth gear is sleeved on the outer side of the drive shaft; the fourth gear forms the power output end of the reducer.

[0015] Preferably, the axial direction of the drive shaft is set to the X-axis direction, the height direction of the power unit is set to the Z-axis direction, a spatial coordinate system is established with the X-axis and the Z-axis as references, and the all-in-one controller and the drive motor are arranged along the Y-axis of the spatial coordinate system.

[0016] According to a second aspect of the present invention, a vehicle is provided, wherein the vehicle is provided with the electric drive system as described above.

[0017] According to the electric drive system and automobile of the present invention, the axis of the power output end of the power unit is set to be collinear with the axis of the drive shaft, which can save a large space, so that the all-in-one controller can be arranged on the side wall of the power unit, thereby effectively reducing the space occupied by the electric drive system in the height direction, and can improve the compactness of the electric drive system and the flexibility of arrangement. In addition, the electric drive system can be arranged in both the front drive and rear drive of the automobile.

[0018] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a schematic diagram of an electric drive system in the prior art;

[0021] Figure 2 It is a schematic diagram of the driving force transmission circuit of the electric drive system in the prior art;

[0022] Figure 3is a schematic diagram of an electric drive system according to the present invention;

[0023] Figure 4 Schematic diagram of the driving force transmission circuit of the electric drive system according to the present invention.

[0024] Icon: 10 - drive shaft; 11 - wheel; 20 - drive motor; 200 - rotor shaft; 21 - reducer; 210 - transmission shaft; 211 - first gear; 212 - second gear; 213 - third gear; 214 - fourth gear; 22 - all-in-one controller. DETAILED DESCRIPTION

[0025] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0026] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0027] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0028] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0029] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0030] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0031] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0032] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0033] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0034] According to a first aspect of the present invention, there is provided an electric drive system, such as Figure 3 to Figure 4As shown, the electric drive system in this embodiment includes a power unit and an all-in-one controller 22, wherein the power unit is connected to the drive shaft 10 to drive the drive shaft 10 to rotate, thereby realizing the transmission of driving force; the all-in-one controller 22 is used to control the start and stop, speed, etc. of the power unit. Hereinafter, the specific connection relationship and position relationship of the above components of the electric drive system according to the present invention will be described in detail.

[0035] In this embodiment, wheels 11 are arranged at both ends of the drive shaft 10 in the axial direction; in addition, the axial direction is set to be the X-axis direction. The specifications of the drive shaft 10, such as its diameter, length, and material, are not specifically limited as long as they can meet the use requirements of the automobile.

[0036] like Figure 3 to Figure 4 As shown, the power unit in this embodiment includes a drive motor 20 and a reducer 21 connected to the drive motor 20, and the power unit is connected to the drive shaft 10 until the reducer 21 is connected to the drive shaft 10. Specifically, the drive motor 20 in this embodiment is provided with a rotor shaft 200, which is formed as a hollow shaft and is sleeved on the outer side of the above-mentioned drive shaft 10, so that the rotor shaft 200 can rotate relative to the drive shaft 10. It should be noted that the ability of the rotor shaft 200 to rotate relative to the drive shaft 10 actually means that: when the all-in-one controller 22 controls the drive motor 20 to turn on, the rotor shaft 200 rotates and the drive shaft 10 is stationary, and when the driving force is transmitted to the drive shaft 10 via the rotor shaft 200 and the reducer 21, the drive shaft 10 and the rotor shaft 200 can rotate at the same time, but the rotation of the two can be synchronous or asynchronous. Based on this technical effect, the rotor shaft 200 can be rotatably sleeved on the outer side of the drive shaft 10 through components such as bearings.

[0037] Furthermore, the rotor shaft 200 extends to the outside of the drive motor 20 , and one end of the rotor shaft 200 away from the drive motor 20 forms a power output end of the drive motor 20 . The axis of the rotor shaft 200 in this embodiment is colinear with the axis of the drive shaft 10 .

[0038] In this embodiment, if Figure 3 to Figure 4 As shown, the reducer 21 includes a first gear 211 and a second gear 212 meshing with each other, and the first gear 211 is sleeved on the outer side of the rotor shaft 200 so that the first gear 211 can rotate synchronously with the rotor shaft 200. The reducer 21 also includes a transmission shaft 210 arranged in parallel with the drive shaft 10, and the second gear 212 is sleeved on the outer side of the first end of the axis direction of the rotating shaft. In addition, the reducer 21 also includes a third gear 213 and a fourth gear 214 meshing with each other, and the third gear 213 is sleeved on the outer side of the second end of the transmission shaft 210 in the axis direction, and the fourth gear 214 is sleeved on the outer side of the drive shaft 10.

[0039] When the all-in-one controller 22 controls the drive motor 20 to start working, the rotor shaft 200 of the drive motor 20 rotates to output the driving force. The driving force passes through the first gear 211, the second gear 212, the transmission shaft 210, the third gear 213 and the fourth gear 214 in sequence, and then is output to the drive shaft 10, thereby driving the wheels 11 at both ends of the axial direction of the drive shaft 10 to rotate, thereby achieving the driving effect of the electric drive system.

[0040] It can be seen from the above content that the fourth gear 214 forms the power output end of the reducer 21. At the same time, the above-mentioned rotor shaft 200 forms the power output end of the drive motor 20. The axis of the fourth gear 214 and the axis of the rotor shaft 200 in this embodiment are both collinear with the axis of the drive shaft 10, that is, the axis of the power output end of the power part in this embodiment is collinear with the axis of the drive shaft 10. In this way (compared to arranging the axis of the power output end of the drive motor 20 parallel to the axis of the drive shaft 10), a large space can be saved, and the all-in-one controller 22 can be arranged in the saved space.

[0041] That is to say, Figure 3 to Figure 4 As shown, in this embodiment, the axial direction of the drive shaft 10 can be set as the X-axis direction, and the height direction of the power unit (i.e., the height direction of the reducer 21 and the drive motor 20) can be further set as the Z-axis direction. A spatial coordinate system is established with the X-axis and the Z-axis as references, and the all-in-one controller 22 and the drive motor 20 are arranged along the Y-axis of the spatial coordinate system. This can greatly reduce the overall height of the electric drive system, thereby releasing a larger space in the height direction of the entire vehicle and improving space utilization.

[0042] In addition, it should be noted that there is no specific limitation on the connection method between the all-in-one controller 22 and the power unit. The all-in-one controller 22 can be connected to the housing of the drive motor 20 or the reducer 21 by means of threaded connection or snap connection. Figure 3 as well as Figure 4 A scheme of connecting the all-in-one controller 22 to the housing of the drive motor 20 is shown); alternatively, the housing of the reducer 21, the housing of the drive motor 20 and the housing of the all-in-one controller 22 can be integrated into one by casting to help improve the overall strength of the housing and improve the NVH effect.

[0043] It should be further explained that there are no specific restrictions on the types, specifications and other features of the gears in the above-mentioned reducer 21. For example, the above-mentioned four gears can be set as cylindrical gears, as long as the above-mentioned technical effect of stable transmission of driving force can be achieved. Furthermore, although not shown in the figure, the fourth gear 214 can be sleeved at the center of the axial direction of the drive shaft 10, which can improve the stability of driving force transmission.

[0044] According to the electric drive system and automobile as described above, the axis of the power output end of the power unit is set to be colinear with the axis of the drive shaft 10, so that a large space can be saved, so that the all-in-one controller 22 can be arranged on the side wall of the power unit, thereby effectively reducing the space occupied by the electric drive system in the height direction, and improving the compactness of the electric drive system and the flexibility of arrangement. In addition, the electric drive system can be arranged in the front drive of the automobile or the rear drive of the automobile.

[0045] According to a second aspect of the present invention, a vehicle is provided, wherein the vehicle is provided with the electric drive system as described above.

[0046] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be described in the protection scope of the claims.

Claims

1. An electric drive system, characterized in that: The electric drive system comprises: A power unit, used to drive the drive shaft to rotate; the axis of the power output end of the power unit is colinear with the axis of the drive shaft; and The all-in-one controller is arranged on the side of the power unit.

2. The electric drive system according to claim 1, characterized in that: The power unit includes a driving motor and a reducer connected to the driving motor.

3. The electric drive system according to claim 2, characterized in that: The drive motor is provided with a rotor shaft, which is formed as a hollow shaft and sleeved on the outer side of the drive shaft so that the rotor shaft can rotate relative to the drive shaft; the axis of the rotor shaft is colinear with the axis of the drive shaft.

4. The electric drive system according to claim 3, characterized in that: The rotor shaft extends to the outside of the driving motor, and one end of the rotor shaft away from the driving motor is formed as a power output end of the driving motor.

5. The electric drive system according to claim 4, characterized in that: The reducer is connected to the rotor shaft.

6. The electric drive system according to claim 5, characterized in that: The reducer includes a first gear and a second gear meshing with each other, wherein the first gear is sleeved on the outer side of the rotor shaft so as to be able to rotate synchronously with the rotor shaft.

7. The electric drive system according to claim 6, characterized in that: The reducer also includes a transmission shaft arranged in parallel with the driving shaft, and the second gear is sleeved on the outer side of the transmission shaft.

8. The electric drive system according to claim 7, characterized in that: The reducer also includes a third gear and a fourth gear meshing with each other, the third gear is sleeved on the outer side of the transmission shaft, and the fourth gear is sleeved on the outer side of the drive shaft; the fourth gear forms the power output end of the reducer.

9. The electric drive system according to claim 2, characterized in that: The axial direction of the driving shaft is set as the X-axis direction, the height direction of the power unit is set as the Z-axis direction, a spatial coordinate system is established based on the X-axis and the Z-axis, and the all-in-one controller and the driving motor are arranged along the Y-axis of the spatial coordinate system.

10. An automobile, characterized in that: The automobile is provided with an electric drive system as claimed in any one of claims 1 to 9.

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