Distributed driving system

Abstract

The invention relates to the technical field of distributed driving systems, in particular to a distributed driving system which structurally comprises two sets of driving modules arranged oppositely. The driving module comprises a power motor and a speed reducing mechanism which is in transmission connection with the power motor; the power motors of the two driving modules are arranged side by side, and the directions of output shafts of the power motors of the two driving modules are opposite. The speed reducing mechanism comprises a planet row and a parallel shaft transmission gear pair which are in transmission connection. The distributed driving system can solve the problem that an existing distributed driving system is insufficient in spatial arrangement.

Description

Technical Field

[0001] The present application relates to the technical field of distributed drive systems, and in particular to a distributed drive system. Background Art

[0002] The distributed drive system is a system where different motors independently drive the corresponding wheels of the vehicle. The torque and speed of each wheel can be independently and accurately controlled by different or the same controller. As a result, vehicles with distributed drive systems can have some special advantages, such as a smaller turning radius and more efficient body stability control. The distributed drive system improves the vehicle's handling performance. At the same time, multiple motors can achieve higher power performance. The distributed drive with a power coupling disconnection mechanism also has higher escape performance and safety redundancy.

[0003] Existing distributed drive systems usually use multi-stage parallel shaft reduction schemes for speed and torque adjustment and adaptation. Due to its simple structure, the size envelope of the integrated motor, reduction mechanism and controller in the vehicle length, width and height directions is inevitably always large and difficult to adjust. Due to the limited chassis space of the vehicle, and the increasing demand for high-end models to increase air suspension to increase output speed and transmit torque, the vehicle chassis has to be redeveloped to adapt to various needs. There are also a few distributed drive systems that use multi-stage planetary gear mechanisms for speed and torque adjustment and adaptation, but the structure of the multi-stage planetary gear mechanism is complex and compact, which is not conducive to the layout of the drive shaft. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a distributed drive system to solve the problem that the existing distributed drive system has deficiencies in spatial layout.

[0005] According to a first aspect of the present invention, a distributed drive system is provided, wherein the distributed drive system comprises two groups of drive modules arranged opposite to each other; the drive modules comprise a power motor and a reduction mechanism transmission-connected to the power motor; the power motors of the two groups of drive modules are arranged side by side, and the output shafts of the power motors of the two groups of drive modules are in opposite directions; the reduction mechanism comprises a planetary gear and a parallel shaft transmission gear pair transmission-connected.

[0006] Preferably, the power motor is drivingly connected to the input shaft of the planetary gear set, and the output shaft of the planetary gear set is drivingly connected to the input shaft of the parallel shaft transmission gear pair.

[0007] Preferably, the first motor is drivingly connected to the first parallel shaft transmission gear pair, the power motor is drivingly connected to the input shaft of the parallel shaft transmission gear pair, and the output shaft of the parallel shaft transmission gear pair is drivingly connected to the input shaft of the planetary gear set.

[0008] Preferably, the distributed drive system further comprises a coupling and disconnecting mechanism for placing the two drive modules in a power coupling state or a power disconnecting state.

[0009] Preferably, the first motor is drivingly connected to the sun gear of the first planetary gear, and the coupling-disconnection mechanism is drivingly connected to the power motor of one group of the drive modules and the reduction mechanism of another group of the drive modules respectively.

[0010] Preferably, the coupling-disconnecting mechanism is respectively transmission-connected to the reduction mechanisms of the two groups of driving modules.

[0011] Preferably, the coupling-disconnection mechanism is respectively connected to the power motors of the two groups of drive modules.

[0012] Preferably, the power coupling disconnection mechanism is arranged between the two speed reduction mechanisms, and the power coupling disconnection mechanism is arranged above or below the two motors.

[0013] Preferably, the driving module further comprises a controller, and the controller is connected to the power motor signal.

[0014] Preferably, the controller is arranged above or below the power motor.

[0015] The distributed drive system of the embodiment of the present invention has the following beneficial effects:

[0016] The power motors of the two drive modules are arranged side by side, and the output shafts of the power motors of the two drive modules are in opposite directions. The power output is achieved through a combination of a planetary gear and a parallel shaft transmission gear pair, making the overall structure relatively compact and the size in the vehicle width direction controllable, which is beneficial to the arrangement of the vehicle drive shaft.

[0017] Under the same space size, by adjusting the speed ratio of the planetary gear and the parallel shaft transmission gear pair, the distributed drive system can have greater torque and higher speed.

[0018] This can effectively solve the problem of insufficient spatial arrangement of existing distributed drive systems.

[0019] 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

[0020] 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.

[0021] Figure 1 is a schematic diagram of an embodiment of a distributed drive system according to the present invention.

[0022] Figure 2 It is a schematic diagram of the distributed drive system according to the present invention from another angle.

[0023] Figure 3 is a schematic diagram of another embodiment of a distributed drive system according to the present invention.

[0024] Figure 4 is a schematic diagram of yet another embodiment of a distributed drive system according to the present invention.

[0025] Figure 5 Schematic diagram of a coupling and disconnection mechanism of a distributed drive system according to the present invention.

[0026] Figure 6 Schematic diagram of an embodiment of a coupling and disconnection mechanism of a distributed drive system according to the present invention.

[0027] Figure 7 It is a schematic diagram of another embodiment of the coupling and disconnection mechanism of the distributed drive system according to the present invention.

[0028] Figure 8 It is a schematic diagram of another embodiment of the coupling and disconnecting mechanism of the distributed drive system according to the present invention.

[0029] Fig. 9 Schematic diagram of another embodiment of a coupling and disconnection mechanism of a distributed drive system according to the present invention.

[0030] Figure markings: 1-first reduction mechanism; 11-first parallel shaft transmission gear pair; 12-first planetary gear set; 2-second reduction mechanism; 21-second parallel shaft transmission gear pair; 22-second planetary gear set; 3-coupling and disconnecting mechanism; 4-first controller; 5-second controller; 10-first wheel end; 20-second wheel end; 100-first motor; 200-second motor. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0035] 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.

[0036] 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.

[0037] The terms used herein are only used to describe various examples and are not used to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprising" and "having" list the existence of the stated features, quantities, operations, components, elements and / or their combinations, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0038] 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.

[0039] 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.

[0040] like Figures 1 to 9 As shown, according to a first aspect of the present invention, a distributed drive system is provided, the distributed drive system comprising a drive module, the drive module comprising a power motor and a reduction mechanism.

[0041] In the following description, reference will be made to Figures 1 to 9 The specific structures of the above components of the distributed drive system and the connection relationships of the above components are described in detail.

[0042] like Figures 1 to 9As shown, in an embodiment, the distributed drive system may include two sets of drive modules arranged oppositely. The drive module may include a power motor (i.e., a first motor 100 or a second motor 200) and a reduction mechanism (i.e., a first reduction mechanism 1 or a second reduction mechanism 2) connected to the power motor in a transmission manner. The first motor 100 and the second motor 200 may be arranged in parallel and side by side. The output shafts of the second motor 200 and the first motor 100 may be in opposite directions (i.e., the first motor 100 and the second motor 200 output in reverse), so that the first reduction mechanism 1 and the second reduction mechanism 2 are staggered. The first motor 100 may be connected to the first wheel end 10 of the vehicle in a transmission manner through the first reduction mechanism 1. The second motor 200 may be connected to the second wheel end 20 of the vehicle in a transmission manner through the second reduction mechanism 2. In this way, the first reduction mechanism 1 and the second reduction mechanism 2 are respectively arranged on both sides of the motor, which greatly saves the layout space, and the compact structure is conducive to the layout of the transmission shaft.

[0043] The deceleration mechanism may include a planetary gear and a parallel shaft transmission gear pair in transmission connection. Figure 1 As shown, the first reduction mechanism 1 may include a first planetary row 12 and a first parallel shaft transmission gear pair 11 in transmission connection, and the second reduction mechanism 2 may include a second planetary row 22 and a second parallel shaft transmission gear pair 21 in transmission connection. The setting mode of the two-stage reduction of the first reduction mechanism 1 and the second reduction mechanism 2 can adjust the speed ratio according to actual needs to achieve the transmission requirements of the system torque and speed without affecting the space layout of the whole vehicle.

[0044] Preferably, Figures 1 to 3 As shown, in the embodiment, the first parallel shaft transmission gear pair 11 and the first planetary row 12 are used to reduce the rotation speed of the first motor 100. The arrangement order of the first planetary row 12 and the first parallel shaft transmission gear pair 11 can be adjusted according to actual needs to achieve a variety of matching methods. Similarly, the second parallel shaft transmission gear pair 21 and the second planetary row 22 are used to reduce the rotation speed of the second motor 200. The arrangement order of the second planetary row 22 and the second parallel shaft transmission gear pair 21 can be adjusted according to actual needs to achieve a variety of matching methods. In a feasible implementation, the first planetary row 12 and the second planetary row 22 can be NGW planetary row gears, and the ring gears of the first planetary row 12 and the second planetary row 22 are both fixed.

[0045] In an embodiment, the power motor may be drivingly connected to the input shaft of the planetary gear set, and the output shaft of the planetary gear set may be drivingly connected to the input shaft of the parallel shaft transmission gear pair; or the power motor may be drivingly connected to the input shaft of the parallel shaft transmission gear pair, and the output shaft of the parallel shaft transmission gear pair may be drivingly connected to the input shaft of the planetary gear set.

[0046] Specifically, it can be Figure 2 As shown, in the embodiment, the output shaft of the first motor 100 can be key-connected with the first parallel shaft transmission gear pair 11. The first parallel shaft transmission gear pair 11 can be rigidly connected to the sun gear of the first planetary row 12. The ring gear of the first planetary row 12 is fixed. The planet carrier of the first planetary row 12 can be transmission-connected with the first wheel end 10. The output shaft of the second motor 200 can be key-connected with the second parallel shaft transmission gear pair 21. The second parallel shaft transmission gear pair 21 can be rigidly connected to the sun gear of the second planetary row 22. The ring gear of the second planetary row 22 is fixed. The planet carrier of the second planetary row 22 can be transmission-connected with the second wheel end 20.

[0047] It can also be, Figure 1 As shown, in the embodiment, the output shaft of the first motor 100 can be connected to the sun gear key of the first planetary row 12. The ring gear of the first planetary row 12 is fixed. The planet carrier of the first planetary row 12 can be rigidly connected to the first parallel shaft transmission gear pair 11. The first parallel shaft transmission gear pair 11 can be transmission-connected to the first wheel end 10. The output shaft of the second motor 200 can be connected to the sun gear key of the second planetary row 22. The ring gear of the second planetary row 22 is fixed. The planet carrier of the second planetary row 22 can be rigidly connected to the second parallel shaft transmission gear pair 21. The second parallel shaft transmission gear pair 21 can be transmission-connected to the second wheel end 20.

[0048] It can also be, Figure 3 As shown, in the embodiment, the output shaft of the first motor 100 can be key-connected with the sun gear of the first planetary row 12. The ring gear of the first planetary row 12 is fixed. The planet carrier of the first planetary row 12 can be rigidly connected with the first parallel shaft transmission gear pair 11. The first parallel shaft transmission gear pair 11 can be transmission-connected with the first wheel end 10. The output shaft of the second motor 200 can be key-connected with the second parallel shaft transmission gear pair 21. The second parallel shaft transmission gear pair 21 can be rigidly connected with the sun gear of the second planetary row 22. The ring gear of the second planetary row 22 is fixed. The planet carrier of the second planetary row 22 can be transmission-connected with the second wheel end 20.

[0049] In addition, preferably, in an embodiment, the distributed drive system may further include a coupling-disconnection mechanism 3 for placing the two drive modules in a power coupling state or a power disconnection state. The coupling-disconnection mechanism 3 may be transmission-connected to the reduction mechanisms of the two groups of drive modules, respectively, that is, the coupling-disconnection mechanism 3 is transmission-connected to the first reduction mechanism 1 and the second reduction mechanism 2. The coupling-disconnection mechanism 3 may also be transmission-connected to the power motors of the two groups of drive modules, respectively, that is, the coupling-disconnection mechanism 3 may be transmission-connected to the first motor 100 and the second motor 200. In addition, the coupling-disconnection mechanism 3 may also be transmission-connected to the power motor of one group of the drive modules and the reduction mechanism of the other group of the drive modules, respectively. With such a configuration, the vehicle can achieve wheel-end power escape in special circumstances, thereby improving the safety redundancy of the system.

[0050] like Figures 5 to 8 As shown, in the embodiment, the coupling disconnection mechanism 3 can be connected to the first reduction mechanism 1 and the second reduction mechanism 2 in various ways, so that the coupling disconnection mechanism 3 can be flexibly arranged according to the actual situation. Figure 1 The right end as shown in the figure) can be coaxially connected to the power output shaft of the first parallel shaft transmission gear pair 11 of the first reduction mechanism 1. The second end of the coupling disconnection mechanism 3 (can be as shown in the figure) can be coaxially connected to the power output shaft of the first parallel shaft transmission gear pair 11 of the first reduction mechanism 1. Figure 1 The left end as shown in the figure can be connected to the power output shaft of the second parallel shaft transmission gear pair 12 of the second reduction mechanism 2.

[0051] Specifically, it can be Figure 5 As shown, in the embodiment, the second end of the coupling disconnection mechanism 3 is connected to the sun gear of the second planetary row 22 and the connecting shaft of the second motor 200 through a parallel shaft transmission gear pair, so that the rotation speed of the second end of the coupling disconnection mechanism 3 is equal to the rotation speed of the sun gear of the second planetary row 22 (i.e., the rotation speed of the second motor 200). Similarly, the coupling disconnection mechanism 3 and the first reduction mechanism 1 can also adopt the above connection method, which will not be repeated here.

[0052] It can also be, Figure 6 As shown, in the embodiment, the second end of the coupling disconnection mechanism 3 is connected to the planet carrier of the second planetary gear 22 and the connecting shaft of the second parallel shaft transmission gear pair 21 through a parallel shaft transmission gear pair, so that the rotation speed of the second end of the coupling disconnection mechanism 3 is equal to the rotation speed of the planet carrier of the second planetary gear 22. Similarly, the coupling disconnection mechanism 3 and the first reduction mechanism 1 can also adopt the above connection method, which will not be repeated here.

[0053] It can also be, Figure 7As shown, in the embodiment, the second end of the coupling disconnection mechanism 3 is coaxially arranged with the gear with a larger diameter in the second parallel shaft transmission gear pair 21, so that the rotation speed of the second end of the coupling disconnection mechanism 3 is equal to the output rotation speed of the second parallel shaft transmission gear pair 21 (i.e., the rotation speed of the first wheel end 10). Similarly, the coupling disconnection mechanism 3 and the first reduction mechanism 1 can also adopt the above connection method, which will not be repeated here.

[0054] It can also be, Figure 8 As shown, in the embodiment, the second end of the coupling disconnection mechanism 3 is coaxially arranged with the gear with a larger diameter in the second parallel shaft transmission gear pair 21, so that the rotation speed of the second end of the coupling disconnection mechanism 3 is equal to the rotation speed of the sun gear of the second planetary gear 22. Similarly, the coupling disconnection mechanism 3 and the first reduction mechanism 1 can also adopt the above connection method, which will not be repeated here.

[0055] Therefore, if Figures 5 to 8 As shown, in the embodiment, there are multiple connection modes available for selection between the coupling disconnection mechanism 3 and the first reduction mechanism 1 and the second reduction mechanism 2. The two ends of the coupling disconnection mechanism 3 can respectively select any two of the above connection modes for matching, so as to select the power transmission path between the first reduction mechanism 1 and the second reduction mechanism 2 according to actual needs, thereby realizing multiple speed transmission requirements without affecting the space layout of the whole vehicle.

[0056] like Fig. 9 As shown, in the embodiment, the second end of the coupling disconnection mechanism 3 can also be directly connected to the second motor 200 through shaft gear transmission. In this case, the second end of the coupling disconnection mechanism 3 and the second reduction mechanism 2 are respectively connected to the two ends of the second motor 200. Similarly, the coupling disconnection mechanism 3 and the first reduction mechanism 1 can also adopt the above connection method, which will not be repeated here.

[0057] Specifically, the coupling-disconnection mechanism 3 may be a structure having a coupling function such as a clutch or a synchronizer. The first reduction mechanism 1 and the second reduction mechanism 2 may be transmission-connected to the coupling-disconnection mechanism 3 via shaft teeth.

[0058] Further, preferably, Figures 1 to 4 As shown, in the embodiment, the power coupling disconnection mechanism 3 can be arranged above or below the two motors, that is, the coupling disconnection mechanism 3 can be arranged above or below the first motor 100 and the second motor 200. In addition, the power coupling disconnection mechanism 3 can be arranged between the two reduction mechanisms, that is, the first reduction mechanism 1 and the second reduction mechanism 2 are respectively located on both sides of the coupling disconnection mechanism 3 in the width direction of the vehicle (such as Figure 1The arrangement of the coupling disconnection mechanism 3 and its connecting shaft in this way can further reduce the occupied space of the distributed drive system.

[0059] In addition, preferably, Figure 4 As shown, in an embodiment, the drive module may further include a controller (i.e., a first controller 4 and a second controller 5), and the controller may be connected to the power motor signal. Among them, the first controller 4 is used to control the speed and direction of the first motor 100, and the second controller 5 is used to control the speed and direction of the second motor 200. To further save space, the first controller 4 and the second controller 5 may be respectively arranged above the first motor 100 and the second motor 200, or the first controller 4 and the second controller 5 may be respectively arranged below the first motor 100 and the second motor 200. That is, the first controller 4 and the second controller 5 are simultaneously arranged above or below the first motor 100 and the second motor 200 (which can be selected according to actual needs) to reduce the size envelope of the distributed drive system.

[0060] During use, the output shafts of the first motor 100 and the second motor 200 of the distributed drive system are set in opposite directions, and power output is achieved through the first reduction mechanism 1 and the second reduction mechanism 2. The structure arranged in this way is relatively compact, and the size in the vehicle width direction is controllable, which is conducive to the layout of the transmission shaft. The first reduction mechanism 1 and the second reduction mechanism 2 are connected by a coupling disconnection mechanism 3, which can achieve wheel-end power escape under special circumstances and improve the safety redundancy of the system. In addition, under the same spatial dimensions, the system can achieve different torque and speed transmission requirements by adjusting the connection mode of the first reduction mechanism 1, the second reduction mechanism 2 and the coupling disconnection mechanism 3 without affecting the spatial layout of the entire vehicle.

[0061] 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 shall be subject to the protection scope of the claims.

Claims

1. A distributed drive system, arranged on a vehicle, characterized in that: The distributed drive system includes two sets of drive modules arranged opposite to each other; The driving module comprises a power motor and a reduction mechanism connected to the power motor in transmission; the power motors of the two groups of driving modules are arranged side by side, and the output shafts of the power motors of the two groups of driving modules are in opposite directions; The speed reduction mechanism comprises a planetary gear and a parallel shaft transmission gear pair which are in transmission connection.

2. A distributed drive system according to claim 1, characterized in that: The power motor is drivingly connected to the input shaft of the planetary gear set, and the output shaft of the planetary gear set is drivingly connected to the input shaft of the parallel shaft transmission gear pair.

3. A distributed drive system according to claim 1, characterized in that: The power motor is drivingly connected to the input shaft of the parallel shaft transmission gear pair, and the output shaft of the parallel shaft transmission gear pair is drivingly connected to the input shaft of the planetary gear set.

4. A distributed drive system according to claim 1, characterized in that: The distributed drive system also includes a coupling and disconnecting mechanism for placing the two drive modules in a power coupling state or a power disconnecting state.

5. A distributed drive system as claimed in claim 4, characterized in that: The coupling disconnection mechanism is respectively connected in transmission with the power motor of one group of the driving modules and the speed reduction mechanism of another group of the driving modules.

6. A distributed drive system as claimed in claim 4, characterized in that: The coupling disconnection mechanism is respectively connected to the speed reduction mechanisms of the two groups of driving modules in a transmission manner.

7. A distributed drive system as claimed in claim 4, characterized in that: The coupling disconnection mechanism is respectively connected to the power motors of the two groups of driving modules.

8. A distributed drive system as claimed in claim 4, characterized in that: The power coupling disconnection mechanism is arranged between the two speed reduction mechanisms, and the power coupling disconnection mechanism is arranged above or below the two motors.

9. A distributed drive system according to claim 1, characterized in that: The driving module also includes a controller, and the controller is connected to the power motor signal.

10. A distributed drive system according to claim 9, characterized in that: The controller is arranged above or below the power motor.

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