Distributed electric drive system and vehicle

Abstract

The utility model provides a distributed electric drive system and a vehicle, the distributed electric drive system comprises a speed reducer, two opposite sides of the speed reducer are correspondingly provided with a first input end and a second input end; the first driving device and the second driving device are located on the two opposite sides of the speed reduction device, the first driving device is connected with the first input end, and the speed reduction device, the first driving device and the second driving device define a containing space; the controller is provided with a first installation part, and the first installation part is arranged in the containing space and corresponds to the speed reduction device up and down. According to the distributed electric drive system, the first driving device and the second driving device protrude upwards relative to the speed reduction device, so that the groove capable of being provided with the first mounting part is formed between the speed reduction device and the first driving device and the second driving device which are located on the two sides, and on one hand, the height size of the distributed electric drive system is reduced; direct connection between a motor three-phase line of the driving device and a controller copper bar is facilitated, and the copper consumption is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and mainly to a distributed electric drive system and a vehicle. Background Art

[0002] Existing distributed electric drive technology integrates dual motors and dual electronic controls. The motors and controllers are usually large in size, and each drive system needs to be connected to the chassis and body of the vehicle, resulting in a large envelope size, which brings difficulties to the layout of the entire vehicle. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a distributed electric drive system and a vehicle, optimize the layout design of the distributed electric drive system, improve the integration of the distributed electric drive and reduce the envelope size.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A technical solution of the present application proposes a distributed electric drive system, comprising:

[0006] A reduction device, wherein two opposite sides of the reduction device are respectively provided with a first input end and a second input end;

[0007] A first driving device and a second driving device are located at opposite sides of the reduction device, the first driving device is connected to the first input end, the second driving device is connected to the second input end, and the reduction device, the first driving device and the second driving device enclose an accommodating space;

[0008] The controller has a first mounting portion, which is installed in the accommodating space and corresponds to the reduction device up and down.

[0009] The present application discloses a distributed electric drive system, wherein a accommodating space is formed between the reduction device and the first drive device and the second drive device arranged on both sides. Since the controller has a first mounting portion, and the first mounting portion corresponds to the reduction device up and down and is located in the accommodating space surrounded by the first drive device, the second drive device and the reduction device, on the one hand, the height difference between the controller and the first drive device and the second drive device is greatly shortened, and the height dimension of the distributed electric drive system is reduced as much as possible, making it more compact in a limited space. On the other hand, it is convenient to directly connect the three-phase line of the motor of the drive device with the copper busbar of the controller, shorten the connection path and reduce the bending degree of the cable, thereby improving the signal transmission efficiency and reducing the fault points, and also greatly saving the amount of copper, which can reduce the demand for copper materials and thus reduce the manufacturing cost.

[0010] According to a technical solution of the present application, the corresponding two ends of the reduction device are the first end and the second end, one end of the first mounting portion is installed in the accommodating space and is arranged corresponding to the first end, and the second mounting portions are arranged on the opposite sides of the other end of the first mounting portion, and the two second mounting portions are located on the opposite sides of the second end. By distributing the second mounting portion of the controller on the opposite sides of the second end of the reduction device, the space on both sides of the output end of the second end of the reduction device can be fully utilized, and the height dimension of the distributed electric drive system configuration can be further reduced.

[0011] According to a technical solution of the present application, a groove is enclosed between the first mounting portion and the second mounting portions arranged on both sides, and the second end of the reduction device is at least partially located in the groove. By providing a groove between the two second mounting portions and the first mounting portion, the size of the second mounting portion along the axial direction of the first drive device and the second drive device is increased, so that the controller can accommodate more controller elements, and at the same time, the reduction device and the second mounting portion can be at least partially overlapped in the height direction without increasing the height dimension of the distributed electric drive system, so as to reduce the height dimension of the distributed electric drive system.

[0012] According to a technical solution of the present application, the first input end and the second input end are correspondingly located on opposite sides of the first end, and the first output end and the second output end are correspondingly provided on opposite sides of the second end. In this way, the input end is connected to the corresponding first drive device or the second drive device to serve as the power source of the reduction device, and the output end is correspondingly connected to other transmission devices to serve as the power output end of the reduction device.

[0013] According to a technical solution of the present application, it also includes a first output shaft and a second output shaft, the first output shaft is used to connect the first output end and the wheel, the second output shaft is used to connect the second output end and the wheel, one of the second mounting parts corresponds to the first output shaft up and down, and the other second mounting part corresponds to the second output shaft up and down. By making the second mounting part correspond to the first output shaft or the second output shaft up and down, the two second mounting parts are located on opposite sides of the second end and are higher than the corresponding first output end and second output end in the up and down direction. In this way, when the distributed electric drive system is used in a vehicle, it can not only make full use of the space between the first output shaft and the bottom of the vehicle to install the controller, but also better protect the controller, thereby improving the stability of the structure.

[0014] According to a technical solution of the present application, there are a first electrical connector and a second electrical connector, wherein the first electrical connector is located above the axial center line of the first drive device and is arranged opposite to the second mounting portion arranged on the same side, and the first electrical connector is used to connect the first drive device and the second mounting portion, and the second electrical connector is located above the axial center line of the second drive device and is arranged opposite to the second mounting portion arranged on the same side, and the second electrical connector is used to connect the second drive device and the second mounting portion. By arranging the first electrical connector above the axial center line of the first drive device and opposite to the second mounting portion, the electrical connection between the first drive device and the second mounting portion is a direct connection structure, avoiding the need for other connections to increase the length and bending degree of the wire, thereby enhancing electrical stability. Similarly, the electrical connection between the second drive device and the second mounting portion is also a direct connection structure, which can shorten the connection path and reduce the bending degree of the cable, thereby improving the signal transmission efficiency and reducing the failure points, and also greatly saving the amount of copper used.

[0015] According to a technical solution of the present application, a first opening is provided on a side above the axial center line of the first driving device and facing the first electrical connector, a second opening is provided on a second mounting portion located on the same side as the first driving device, the first opening and the second opening are arranged opposite to each other, one side of the first electrical connector is connected to the first driving device through the first opening, and the other side of the first electrical connector is connected to the second mounting portion arranged on the same side through the second opening.

[0016] According to a technical solution of the present application, a third opening is provided on a side above the axial center line of the second driving device and facing the second electrical connector, and a fourth opening is provided on a second mounting portion located on the same side as the second driving device, the third opening and the fourth opening are arranged opposite to each other, one side of the second electrical connector is connected to the second driving device through the third opening, and the other side of the second electrical connector is connected to the second mounting portion arranged on the same side through the fourth opening.

[0017] According to a technical solution of the present application, a reducer is correspondingly arranged on opposite sides of the reduction device, the reducer on one side is provided with the first input end, the reducer on the other side is provided with the second input end, and the two reducers are centrally symmetrically arranged or arranged in translation along opposite sides of the reduction device. By arranging the two reducers centrally symmetrically or in translation along opposite sides of the reduction device, the stability of the system can be enhanced, which helps to balance the forces and torques in the system, reduce vibration and imbalance, and make more effective use of space, making the entire system more compact and efficient.

[0018] According to a technical solution of the present application, the reducer includes a primary reduction gear set and a secondary reduction gear set, wherein the primary reduction gear set is located at one of the two corresponding ends of the reduction device, and the secondary reduction gear set is located at the other of the two corresponding ends of the reduction device, and the output end of the primary reduction gear set is transmission-connected with the input end of the secondary reduction gear set and is coaxially arranged. By correspondingly arranging the input end of the primary reduction gear set and the output end of the secondary reduction gear set at the two corresponding ends of the reduction device, the space utilization of the reducer along the length direction of the vehicle body can be effectively utilized, and the output end of the primary reduction gear set and the input end of the secondary reduction gear set are connected by coaxial transmission, thereby shortening the occupied size along the length direction of the vehicle body, making the overall structure of the distributed electric drive system more compact.

[0019] According to a technical solution of the present application, the first-stage reduction gear set is provided with the first input end, the second-stage reduction gear set is provided with the first output end, and the first-stage reduction gear set is arranged closer to the first driving device than the second-stage reduction gear set. This can reduce the interference between the output end of the second-stage reduction gear set and the housing of the first driving device, thereby reducing the situation where the driving device needs to move outward to avoid the increase in the axial distance.

[0020] According to a technical solution of the present application, a locking mechanism is also included, and the locking mechanism is connected between the two reducers. The locking mechanism transmits the power of the deceleration on one side to the reducer on the other side by engaging the two reducers. The traction of the vehicle can be increased by connecting the two reducers through the locking mechanism. When the locking mechanism is combined with the reducers on both sides, when the reducer on one side is working, the locking mechanism transmits the power to the reducer on the other side, so that the two reducers work together to provide greater driving force, which helps the vehicle overcome obstacles and get out of trouble.

[0021] According to a technical solution of the present application, it also includes a first input shaft and a second input shaft, the first input shaft is transmission-connected between the first drive device and the reducer on the corresponding side, the second input shaft is transmission-connected between the second drive device and the reducer on the corresponding side, and the locking mechanism is arranged between the first input shaft and the second input shaft. Specifically, the first input shaft and the second input shaft are respectively used for power transmission, transmitting the power of the first drive device and the second drive device to the reducer, and the locking mechanism is arranged between the first input shaft and the second input shaft, which can realize the synchronous transmission of power of the reducers on both sides.

[0022] According to a technical solution of the present application, the locking mechanism includes a synchronizer.

[0023] According to a technical solution of the present application, an oil pump assembly is also included, the oil pump assembly is arranged below the first mounting portion and between the first drive device and the second drive device, the tops of the first drive device and the second drive device are both raised upward relative to the top of the oil pump assembly, and the oil pump assembly is used to deliver cooling oil to the first drive device and the second drive device. By integrating the design of the oil pump assembly, the oil channel path for the oil pump assembly to deliver cooling oil to both sides is shortened, and the oil pump oil channel processing technology can also be made simpler.

[0024] According to a technical solution of the present application, a reducer housing is provided on the outside of the reduction device, and the reducer housing is recessed to form a mounting groove, and the oil pump assembly is installed in the mounting groove. In this way, on the one hand, the space between the reducer, the first mounting portion of the controller, the first drive device and the second drive device can be more fully utilized, and the overall size of the system can be further optimized; on the other hand, the oil pump assembly is installed in the mounting groove, which can enhance the stability of the oil pump assembly and prevent it from displacement or vibration during operation.

[0025] According to a technical solution of the present application, a sensor device is also included, the sensor device is electrically connected to the first drive device and the second drive device, and is used to sense and obtain the working state parameters of the first drive device and the second drive device. The sensor device is arranged above the reduction device, and the sensor device corresponds to the reduction device up and down and is located between the first drive device and the second drive device. By integrating the sensor device in the area between the first drive device and the second drive device, the limited space can be utilized to the maximum extent, thereby reducing the axial size of the first drive device and the second drive device. When used in a vehicle, the size of the distributed electric drive system along the vehicle width direction can be reduced accordingly.

[0026] According to a technical solution of the present application, the electrical connection wires of the first drive device and the second drive device are integrated and installed between the first drive device and the second drive device. Compared with the technical solution in the prior art in which the electrical connection wires are dispersed on both sides of the motor end cover, by integrating the electrical connection wires of the first drive device and the second drive device between the two, the axial size of the distributed electric drive system can be well reduced, making the entire system more compact, and also reducing the length of the electrical connection wires and the complexity of the installation design.

[0027] According to a technical solution of the present application, the controller includes a controller housing, and the controller housing is T-shaped.

[0028] The two technical solutions of the present application propose a vehicle, characterized in that it includes a vehicle body, wheels and an electric drive system, the wheels are mounted on the vehicle body, the electric drive system includes a distributed electric drive system as described in any of the above embodiments, and the distributed electric drive system is used to drive the two wheels to move.

[0029] A vehicle disclosed in the present application forms a height difference design between a first drive device and a second drive device by applying a distributed electric drive system of any of the above-mentioned embodiments, a reduction device is installed between the first drive device and the second drive device, and the space between the first drive device, the second drive device and the reduction device is fully utilized to effectively reduce the height dimension of the electric drive system. Furthermore, the space between the first drive device and the second drive device is fully utilized in combination with a corresponding structural design, thereby effectively reducing the axial dimension of the electric drive system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of the spatial structure of a distributed electric drive system according to an embodiment of the present application;

[0031] Figure 2 This is one of the exploded views of the distributed electric drive system of one embodiment of the present application;

[0032] Figure 3 This is the second exploded view of the distributed electric drive system of one embodiment of the present application;

[0033] Figure 4 It is a left view of a distributed electric drive system according to an embodiment of the present application;

[0034] Figure 5 is a schematic diagram of the transmission structure of a distributed electric drive system according to an embodiment of the present application;

[0035] Figure 6 It is a structural schematic diagram of an oil pump assembly device according to an embodiment of the present application.

[0036] The corresponding relationship between the reference numerals and the component names is as follows:

[0037] 1 reduction gear, 101 mounting groove, 102 accommodating space, 103 groove, 104 first opening, 11 reducer, 111 primary reduction gear set, 1111 primary driving gear, 1112 primary driven gear, 112 secondary reduction gear set, 1121 secondary driving gear, 1122 secondary driven gear, 12 reducer housing;

[0038] 2 a first driving device;

[0039] 3. Second driving device;

[0040] 4 controller, 41 first mounting portion, 42 second mounting portion;

[0041] 51 a first output shaft, 52 a second output shaft;

[0042] 61 first input shaft, 62 second input shaft;

[0043] 71 a first electrical connector, 72 a second electrical connector;

[0044] 8. Locking mechanism;

[0045] 9 oil pump assembly device, 91 electric oil pump motor, 92 pump head, 93 electric oil pump housing. DETAILED DESCRIPTION

[0046] The utility model provides a distributed electric drive system and a vehicle. In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the protection scope of the utility model.

[0047] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as a limitation on the present invention.

[0048] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0049] The existing distributed electric drive technology integrates dual motors and dual electronic controls. The motor and controller 4 are usually large in size, and each drive system needs to be connected to the chassis and body of the vehicle, resulting in a large envelope size, which brings difficulties to the layout of the entire vehicle.

[0050] Based on this, an embodiment of one aspect of the present application proposes a distributed electric drive system, including a reduction device 1, a first drive device 2, a second drive device 3 and a controller 4.

[0051] Please refer to the attached Figure 1 To Attachment Figure 4 The first input terminal and the second input terminal are correspondingly provided on opposite sides of the reduction gear 1; the first drive device 2 and the second drive device 3 are located on opposite sides of the reduction gear 1, the first drive device 2 is connected to the first input terminal, and the second drive device 3 is connected to the second input terminal, and the reduction gear 1, the first drive device 2 and the second drive device 3 are enclosed by an accommodating space 102, and the controller 4 has a first mounting portion 41, and the first mounting portion 41 corresponds to the reduction gear 1 up and down and is located between the first drive device 2 and the second drive device 3.

[0052] As attached Figure 2 As shown, the first drive device 2 and the second drive device 3 are used for transmission connection with the reduction device 1. Under the action of the reduction device 1, the output power of the first drive device 2 and the second drive device 3 can be adjusted according to actual usage requirements. The controller 4 is used for electrically connecting with the first drive device 2 and the second drive device 3, so as to control the working state of the first drive device 2 and the second drive device 3.

[0053] Among them, in order to optimize the spatial configuration design of the distributed electric drive system, the first drive device 2 and the second drive device 3 are both raised upward relative to the reduction device 1, so that an accommodation space 102 is formed between the reduction device 1 and the first drive device 2 and the second drive device 3 arranged on both sides. Since the controller 4 has a first mounting portion 41, and the first mounting portion 41 corresponds to the reduction device 1 up and down and is located between the first drive device 2 and the second drive device 3, the first mounting portion 41 can be installed in the above-mentioned accommodation space 102. On the one hand, the height difference between the controller 4 and the first drive device 2 and the second drive device 3 is greatly shortened, and the height size of the distributed electric drive system is reduced as much as possible, making it more compact in a limited space. On the other hand, the spatial layout of the first drive device 2 and the second drive device 3 being higher than the reduction device 1 is also conducive to the cooling oil delivery efficiency from the first drive device 2 and the second drive device 3 to the reduction device 1, thereby improving the cooling effect of the distributed electric drive system during the transmission process, having good heat dissipation performance, and thus facilitating the stable operation of the distributed electric drive system under various working conditions and extending its service life.

[0054] In more detail, this layout can solve the existing distributed electric drive system configuration, which increases the difficulty of connection due to the large height difference between the controller 4 and the drive device, and causes problems such as messy distribution of connecting lines. In the distributed electric drive system configuration designed in this application, the height dimension between the controller 4 and the first drive device 2 and the second drive device 3 is greatly shortened, avoiding the need for the three-phase line of the motor of the drive device to bypass this height difference, thereby increasing the length and bending degree of the line, and the long distance and excessive bending may increase the resistance of the cable and affect the transmission effect of the signal. In the above-mentioned distributed electric drive system, it is convenient to directly connect the three-phase line of the motor of the drive device to the copper bus of the controller 4, shorten the connection path and reduce the bending degree of the cable, thereby improving the signal transmission efficiency and reducing the fault points, and also greatly saving the amount of copper, which can reduce the demand for copper materials, thereby reducing manufacturing costs.

[0055] In some embodiments, the corresponding two ends of the reduction gear 1 are the first end and the second end, the first input end and the second input end are correspondingly located at opposite sides of the first end, and the first output end and the second output end are correspondingly provided at opposite sides of the second end. The first end and the second end of the reduction gear 1 are respectively configured as the input end and the output end, wherein the input end is connected to the corresponding first drive device 2 or the second drive device 3 and serves as the power source of the reduction gear 1, and the output end is correspondingly connected to other transmission devices and serves as the power output end of the reduction gear 1.

[0056] Further, one end of the first mounting portion 41 is installed in the accommodating space 102 and is arranged corresponding to the first end. Specifically, Figure 2 and Figure 4 As shown, one end of the first mounting portion 41 corresponds to the first end up and down and is located between the first drive device 2 and the second drive device 3, and the other end of the first mounting portion 41 corresponds to the second end up and down. The controller 4 also has a second mounting portion 42, and second mounting portions 42 are arranged on opposite sides of the other end of the first mounting portion 41, and the two second mounting portions 42 are located on opposite sides of the second end.

[0057] Specifically, in order to further reduce the height dimension of the distributed electric drive system configuration, the space on one side of the output end of the reduction device 1 can be fully utilized by further designing the distribution structure of the controller 4. The controller 4 also includes a second mounting portion 42 arranged on the opposite sides of the other end of the first mounting portion 41. In this way, the second mounting portion 42 can provide additional space for other auxiliary components or connecting lines. The second mounting portion 42 is distributed on the opposite sides of the second end of the reduction device 1. In combination with the above-mentioned embodiment scheme and the accompanying drawings, it can be seen that the second mounting portion 42 is arranged with the drive device on the corresponding side, thereby further reducing the spatial height of the distributed electric drive system and improving the system integration.

[0058] In some embodiments, the first mounting portion 41 can be set as a long strip extension, and the second mounting portion 42 can be set as a long strip side convex portion, and accordingly, the two side convex portions are located on both sides of the extension. Further, the extension portion can be set up in correspondence with the length direction of the reduction gear 1, so that the space set along the length of the reduction gear 1 can be more fully utilized, and the side convex portion can be correspondingly installed between the second end of the reduction gear 1 and the first drive device 2, or between the second end of the reduction gear 1 and the first drive device 2, so as to better utilize the space of the distributed electric drive system.

[0059] For details, please refer to Figure 1 and Figure 2 The overall shape of the controller 4 is T-shaped, that is, the first mounting portion 41 and the second mounting portion 42 form a T-shape, the first mounting portion 41 is arranged correspondingly to the reducer 11 up and down, and the second mounting portions 42 on both sides of the first mounting portion 41 are distributed on the two outer sides of the second end of the reduction device 1, and are arranged opposite to the corresponding first drive device 2 and the second drive device 3.

[0060] Of course, the present application does not limit the shape of the controller 4 to the T-shape mentioned above. It can also be designed to be a convex shape, a turquoise shape, etc. As long as the distribution configuration includes the above-mentioned first mounting part 41 and the second mounting part 42, it also belongs to one of the solutions specified in the present application.

[0061] In some embodiments, the first mounting portion 41 and the second mounting portions 42 disposed on both sides form a groove 103, and the second end of the reduction device 1 is at least partially located in the groove 103. Figure 1 As shown, the groove 103 enclosed by the two second mounting portions 42 and the first mounting portion 41 is arranged toward the side where the second end of the reduction device 1 is located, so that the size of the second mounting portion 42 along the height direction of the first drive device 2 or the second drive device 3 can be increased. On the one hand, the controller 4 can accommodate more controller elements. On the other hand, without increasing the height dimension of the distributed electric drive system, the reduction device 1 and the second mounting portion 42 are at least partially overlapped in the height direction to reduce the size of the distributed electric drive system in the height direction.

[0062] Furthermore, the distributed electric drive system also includes a first output shaft 51 and a second output shaft 52, the first output shaft 51 is used to connect the first output end with the wheel, and the second output shaft 52 is used to connect the second output end with the wheel, one of the second mounting portions 42 corresponds to the first output shaft 51 up and down, and the other second mounting portion 42 corresponds to the second output shaft 52 up and down.

[0063] As attached Figure 5As shown, W1 and W2 indicated in the figure refer to the wheels on the left and right sides respectively. The output end of the reduction device 1 is connected to the wheel through the first output shaft 51 and the second output shaft 52, which can enhance the output stability of the whole system. The design of the output shaft can ensure that the power transmission is more direct and efficient, reduce energy loss and vibration, and by making the second mounting portion 42 correspond to the first output shaft 51 or the second output shaft 52 up and down, the two second mounting portions 42 are located on the opposite sides of the second end and are higher than the corresponding first output end and second output end in the up and down direction. In this way, when the distributed electric drive system is applied in the vehicle, not only can the space between the first output shaft 51 and the bottom of the vehicle be fully utilized to install the controller 4, but the second mounting portion 42 of the controller 4 is arranged relative to the corresponding first drive device and the second drive device, which is conducive to the direct connection of the motor three-phase line of the drive device with the copper busbar of the controller, greatly saving the amount of copper, but also better protecting the controller 4, thereby improving the stability of the structure.

[0064] like Figure 2 and Figure 3 As shown, the distributed electric drive system further includes a first electrical connector 71 and a second electrical connector 72. Correspondingly, the first electrical connector 71 and the second electrical connector 72 are respectively used for electrical control connection with the first drive device 2 and the second drive device 3. Among them, the first electrical connector 71 is located above the axial center line of the first drive device 2 and is arranged opposite to the second mounting portion 42 arranged on the same side. The first electrical connector 71 is used to connect the first drive device 2 with the second mounting portion 42 arranged on the same side. The second electrical connector 72 is located above the axial center line of the second drive device 3 and is arranged opposite to the second mounting portion 42 arranged on the same side. The second electrical connector 72 is used to connect the second drive device 3 with the second mounting portion 42 arranged on the same side.

[0065] For example, by arranging the first electrical connector 71 above the axial center line of the first drive device 2 and opposite to the second mounting portion 42, the electrical connection between the first drive device 2 and the second mounting portion 42 is a direct connection structure, avoiding the need for other connections to increase the length and bending degree of the wire, thereby enhancing electrical stability.

[0066] Similarly, the electrical connection between the second driving device 3 and the second mounting portion 42 is also a direct connection structure, which can shorten the connection path and reduce the bending degree of the cable, thereby improving signal transmission efficiency and reducing failure points, and greatly saving copper usage.

[0067] In more detail, the first drive device 2 and the second drive device 3 are respectively provided with motors, and correspondingly, the first drive device 2 and the second drive device 3 are respectively connected to the reduction device 1 through the rotor shaft. The axial center line of the first drive device 2 can be understood as the axial center line of the rotor shaft; and the electrical connector 7 is a high-voltage connector, and a sealing ring is set between the controller 4 and the high-voltage connectors on both sides to make it have better dustproof and waterproof effects, thereby improving the safety and stability of the electrical connection.

[0068] Among them, a first opening 104 is provided on the side above the axial center line of the first drive device 2 and facing the first electrical connector 71, and a second opening is provided on the second mounting portion 42 located on the same side as the first drive device 2, and the first opening 104 and the second opening are arranged opposite to each other. One side of the first electrical connector 71 is connected to the first drive device 2 through the first opening 104, and the other side of the first electrical connector 71 is connected to the second mounting portion arranged on the same side through the second opening. In this way, by providing corresponding openings on the first drive device 2 and the second mounting portion 42 corresponding to the first drive device 2, the two sides of the first electrical connector 71 can be connected to the first drive device 2 and the second mounting portion 42 on the corresponding side through the openings, thereby realizing a direct connection structure between the first drive device 2 and the controller.

[0069] Similarly, a third opening is provided on the side above the axial center line of the second drive device 3 and facing the second electrical connector 72, and a fourth opening is provided on the second mounting portion 42 located on the same side as the second drive device 3. The third opening and the fourth opening are arranged opposite to each other. One side of the second electrical connector 72 is connected to the second drive device 3 through the third opening, and the other side of the second electrical connector 72 is connected to the second mounting portion 42 arranged on the same side through the fourth opening, so that both sides of the second electrical connector 72 can be connected to the second drive device 3 and the second mounting portion 42 on the corresponding side through the opening, thereby realizing a direct connection structure between the second drive device 3 and the controller.

[0070] Furthermore, if Figure 3As shown, a reducer 11 is correspondingly arranged on the opposite sides of the reduction gear 1, the reducer 11 located on one side is provided with a first input end, and the reducer 11 located on the other side is provided with a second input end, and the two reducers 11 are arranged symmetrically at the center or arranged in translation along the opposite sides of the reduction gear 1. By arranging two reducers 11 on the opposite sides of the reduction gear 1, each reducer 11 corresponds to an input end, the driving capacity of the system can be increased, thereby improving the overall efficiency of the system. In more detail, the reducer 11 is correspondingly provided with the above-mentioned input end and output end, the input end is connected to the driving device on the corresponding side by transmission, and the output end can be used for connecting to the wheel by transmission. Further, by arranging the two reducers 11 symmetrically at the center or arranged in translation along the opposite sides of the reduction gear 1, the stability of the system can be enhanced. This symmetrical or translational design helps to balance the force and torque in the system, reduce vibration and imbalance, improve the reliability and stability of the system, and can also make more full use of space, making the entire system more compact and efficient.

[0071] In some embodiments, the reducer includes a primary reduction gear group and a secondary reduction gear group. The primary reduction gear group is located at one of the corresponding ends of the reduction device, and the secondary reduction gear group is located at the other end of the corresponding ends of the reduction device. The output end of the primary reduction gear group is transmission-connected to the input end of the secondary reduction gear group and is coaxially arranged.

[0072] In some embodiments, a locking mechanism 8 is further included. The locking mechanism 8 is connected between the two reducers 11. The locking mechanism 8 engages the two reducers 11 to transmit the decelerated power on one side to the reducer 11 on the other side.

[0073] Specifically, when a vehicle is stuck in mud, snow or other low-adhesion roads, a single drive device and reducer 11 may not be able to provide sufficient traction to get the vehicle out of trouble. Connecting two reducers 11 through the locking mechanism 8 can increase the traction of the vehicle. When the locking mechanism 8 is combined with the reducers 11 on both sides, when the reducer 11 on one side is working, the locking mechanism 8 transfers power to the reducer 11 on the other side, so that the two reducers 11 work together to provide greater driving force, which helps the vehicle overcome obstacles and get out of trouble. Moreover, under complex road conditions, the power transmission of the vehicle may be disturbed or interrupted. The setting in the locking mechanism 8 can ensure a stable connection between the two reducers 11 to prevent loss or interruption in the power transmission process. This stability ensures continuous and effective power output, which helps improve the vehicle's ability to get out of trouble.

[0074] Furthermore, it also includes a first input shaft 61 and a second input shaft 62, the first input shaft 61 is transmission-connected between the first drive device 2 and the reducer 11 on the corresponding side, the second input shaft 62 is transmission-connected between the second drive device 3 and the reducer 11 on the corresponding side, and the locking mechanism 8 is arranged between the first input shaft 61 and the second input shaft 62, so that the locking mechanism 8 is in an engaged state, and the power of the reducer 11 on one side is transmitted to the reducer 11 on the other side. By having the first drive device 2 and the second drive device 3 drive the reducer 11 on the corresponding side respectively, the first input shaft 61 and the second input shaft 62 are respectively used for power transmission, and the power of the first drive device 2 and the second drive device 3 is transmitted to the reducer 11, and the locking mechanism 8 is arranged between the first input shaft 61 and the second input shaft 62, it is possible to achieve synchronous power transmission of the reducers 11 on both sides.

[0075] Usually, when the first drive device 2 is started, its power is transmitted to the reducer 11 on the corresponding side through the first input shaft 61, driving the reducer 11 to work. Similarly, the power of the second drive device 3 is transmitted to the reducer 11 on the other side through the second input shaft 62. Figure 5 When it is necessary to transmit the power of the reducers 11 on both sides synchronously, the locking mechanism 8 is in a state of combining the first input shaft 61 and the second input shaft 62. At this time, the first input shaft 61 and the second input shaft 62 are connected together, realizing the power transmission of the reducers 11 on both sides. When it is not necessary for the reducers 11 on both sides to work together, the locking mechanism 8 can be in a separated state, so that the reducers 11 on both sides work independently to realize distributed drive. This can better adapt to different working conditions and requirements and improve the flexibility and efficiency of the system. In this way, the traction and escape ability of the vehicle can be improved, so that it can better adapt to complex road conditions and harsh environments. At the same time, the integration and flexibility of the system are also improved.

[0076] In some embodiments, the reducer 11 includes a primary reduction gear set 111 and a secondary reduction gear set 112, the primary reduction gear set 111 is located at one of the corresponding ends of the reduction device 1, and the secondary reduction gear set 112 is located at the other end of the corresponding ends of the reduction device 1, and the output end of the primary reduction gear set 111 is transmission-connected with the input end of the secondary reduction gear set 112 and is coaxially arranged. By correspondingly arranging the input end of the primary reduction gear set 111 and the output end of the secondary reduction gear set 112 at the corresponding ends of the reduction device 1, the Figure 3As shown, the corresponding two ends of the reduction gear 1 can also be understood as the length direction of the reduction gear 1. The first-stage reduction gear set 111 and the second-stage reduction gear set 112 are distributed along the length direction of the reduction gear 1. When the distributed electric drive system is applied to a vehicle, the space of the reducer 11 along the length direction of the vehicle body can be effectively utilized. The output end of the first-stage reduction gear set 111 and the input end of the second-stage reduction gear set 112 are connected by a coaxial transmission to shorten the occupied size along the length direction of the vehicle body, making the overall structure of the distributed electric drive system more compact.

[0077] Taking the reducer 11 with a first input end as an example, the first-stage reduction gear set 111 has a first input end, the second-stage reduction gear set 112 has a first output end, and the first-stage reduction gear set 111 is arranged closer to the first driving device than the second-stage reduction gear set 112.

[0078] It should be noted that, for the reducer 11 having a second input end, its primary reduction gear set 111 can also be arranged closer to the second driving device than its secondary reduction gear set 112 .

[0079] Specifically, the first-stage reduction gear set 111 of the reducer 11 on both sides is respectively provided with a first-stage input gear, which is directly connected to the first input shaft 61 or the second input shaft 62 on the corresponding side, so as to transmit power under the drive of the driving device. Figure 3 and Figure 5 The reducer 11 includes a primary reduction gear set 111 and a secondary reduction gear set 112, wherein the primary reduction gear set 111 includes a primary driving gear 1111 and a primary driven gear 1112 meshing with each other, and the secondary reduction gear set 112 includes a secondary driving gear 1121 and a secondary driven gear 1122 meshing with each other, the first input shaft 61 is connected to the primary driving gear 1111, the primary driven gear 1112 and the secondary driving gear 1121 are arranged on the same intermediate transmission shaft, and the secondary driven gear 1122 drives the wheels on both sides to rotate through the first output shaft 51 or the second output shaft 52. The locking mechanism 8 can also be arranged between the first output shaft 51 and the second output shaft 52, and can also play the role of transmitting the power of the reducer 11 on one side to the reducer 11 on the other side. However, the locking mechanism 8 is arranged between the first input shaft 61 and the second input shaft 62. Since the input shaft is the starting point of power transmission, controlling the power transmission at this position can be more direct and efficient, and can also reduce the loss of torque in the transmission process. The torque of the reducers 11 on both sides can be transmitted more efficiently, and the power synchronization of the reducers 11 on both sides can be achieved more quickly and accurately, thereby improving the vehicle's traction and escape ability.

[0080] To take a more detailed example, in order to further shorten the axial dimension of the distributed electric drive system, the first-stage driving gear 1111 is arranged close to the first drive device 2 or the second drive device 3 on the same side, which is beneficial to significantly reduce the axial distance between the first drive device 2 and the second drive device 3. On the other hand, taking the reducer close to the first drive device 2 as an example, the second-stage reduction gear set 112 is arranged farther away from the first drive device 2 relative to the first-stage reduction gear set 111. This can avoid interference between the output end of the second-stage reduction gear set 112 and the housing of the first drive device 2, which requires the drive device to move outward to avoid the increase in the axial distance.

[0081] Furthermore, the locking mechanism 8 includes a synchronizer, wherein the synchronizer can reduce the impact and vibration between the first input shaft 61 and the second input shaft 62. During the engagement and disengagement process, the synchronizer can smoothly transition, reduce the impact on the system, reduce vibration and noise, and improve the comfort and stability of the system.

[0082] In some embodiments, an oil pump assembly 9 is also included. The oil pump assembly 9 is arranged below the first mounting portion 41 and between the first drive device 2 and the second drive device 3. The tops of the first drive device 2 and the second drive device 3 are both raised upward relative to the top of the oil pump assembly 9. The oil pump assembly 9 is used to deliver cooling oil to the first drive device 2 and the second drive device 3. In the distributed electric drive system of the present application, the electric oil pump subassembly is designed as an independent structure and integrated into the oil pump assembly 9. The oil pump assembly 9 is used to deliver cooling oil to the first drive device 2 and the second drive device 3, thereby ensuring that the first drive device 2 and the second drive device 3 work at an appropriate temperature to avoid failures or safety hazards caused by overheating. Specifically, the oil pump assembly 9 is installed between the first drive device 2 and the second drive device 3, shortening the oil path of the oil pump assembly 9 for transporting cooling oil to both sides, and the oil pump assembly 9 is integrated below the first mounting portion 41 of the controller 4, which is beneficial to reducing the height of the distributed electric drive system. Moreover, the independently designed electric oil pump subassembly can more flexibly adapt to different spatial layout requirements, and can be placed in a more suitable position according to the specific vehicle design and the configuration of the electric drive system, thereby optimizing the layout of the entire system and improving the performance and efficiency of the vehicle.

[0083] For details, please refer to the attached Figure 6The oil pump assembly 9 includes an electric oil pump motor 91, a pump head 92 and an electric oil pump housing 93, wherein the electric oil pump housing 93 is provided with an installation cavity, so that the electric oil pump motor 91 and the pump head 92 can be integrated and installed in the installation cavity, and the electric oil pump housing 93 plays a protective role. Furthermore, the oil pump assembly 9 is connected to the first drive device 2 and the second drive device 3 on both sides by bolts, and the disassembly and replacement process is relatively simple. When the electric oil pump fails or needs to be replaced, it can be quickly removed from the bolt connection and replaced without the need to deeply disassemble the entire electric drive system. This greatly improves the maintenance efficiency and convenience.

[0084] Furthermore, a reducer housing 12 is provided on the outside of the reduction gear 1, and a portion of the reducer housing 12 is recessed to form a mounting groove 101, and the oil pump assembly 9 is installed in the mounting groove 101. By forming the mounting groove 101 by the recess of the reducer housing 12 so as to accommodate the oil pump assembly 9, on the one hand, the space between the reducer 11, the first mounting portion 41 of the controller 4, the first drive device 2 and the second drive device 3 can be more fully utilized, and the overall size of the system can be further optimized; on the other hand, the oil pump assembly 9 is installed in the mounting groove 101, which can enhance the stability of the oil pump assembly 9 and prevent it from displacement or vibration during operation.

[0085] In some embodiments, a sensor device is also included, which is electrically connected to the first drive device 2 and the second drive device 3, and is used to sense and obtain working state parameters of the first drive device 2 and the second drive device 3. The sensor device is arranged above the reduction device 1, and the sensor device corresponds to the reduction device 1 up and down and is located between the first drive device 2 and the second drive device 3.

[0086] Among them, the sensor device is used to sense and obtain the working state parameters of the first drive device 2 and the second drive device 3, such as speed, temperature, pressure, etc. This real-time monitoring function helps to detect abnormal conditions in time and take corresponding measures to deal with them. Compared with the prior art, integrating the sensor device in the area between the first drive device 2 and the second drive device 3 can maximize the use of limited space, thereby reducing the axial size of the first drive device 2 and the second drive device 3. When used in a vehicle, the size of the distributed electric drive system along the vehicle width direction can be reduced accordingly.

[0087] For example, the sensor device includes a resolver signal sensor and an oil temperature signal sensor, wherein the resolver signal sensor is usually used to detect the rotor position of the motor, which is conducive to accurately controlling the rotation angle and speed of the motor; the oil temperature signal sensor is used to monitor the oil temperature to ensure that the system works at a suitable temperature to prevent overheating or damage. The above-mentioned sensor is integrated in the area between the first drive device 2 and the second drive device 3, which effectively utilizes this space and avoids the additional size increase caused by the integration on the end cover side of the first drive device 2 and the second drive device 3. Through this integration method, the axial size of the distributed electric drive system can be reduced to make it more compact.

[0088] In some embodiments, the electrical connection lines of the first drive device 2 and the second drive device 3 are integrated and installed between the first drive device 2 and the second drive device 3. In detail, the first drive device 2 and the second drive device 3 include motors, and the electrical connection lines of the motors and the controller 4 or other devices are integrated in the area between them. Compared with the technical solution of distributing the electrical connection lines on both sides of the motor end cover in the prior art, the axial size of the distributed electric drive system can be well reduced, making the entire system more compact; it can also reduce the length and complexity of the electrical connection lines, and reduce the signal attenuation, interference and failure risks caused by too long or too complicated lines.

[0089] In some embodiments, the controller 4 includes a controller housing, and the controller housing is T-shaped.

[0090] Specifically, the controller housing is arranged to correspond to the overall shape of the controller 4, wherein the first mounting portion 41 in the T-shape of the controller housing corresponds to the first mounting portion 41 of the controller 4, and is correspondingly arranged above the reducer 11 and between the first drive device 2 and the second drive device 3, and the two side protrusions in the T-shape of the controller housing correspond to the second mounting portion 42 of the controller 4. Combined with the above-mentioned structural arrangement, the controller housing is T-shaped and correspondingly installed in the accommodating space formed by the two drive devices and the reduction device 1, and between the two sides of the output end of the reduction device 1, which can make the overall structure compact. On the other hand, it can shorten the height difference between the controller housing and the first drive device 2 and the second drive device 3, thereby facilitating the direct connection of the three-phase line of the motor with the copper busbar of the controller 4, shortening the connection path, and saving copper.

[0091] Another embodiment of the present application proposes a vehicle, including a vehicle body, wheels and an electric drive system, wherein the wheels are mounted on the vehicle body, and the electric drive system includes a distributed electric drive system as in any of the above embodiments, and the distributed electric drive system is used to drive two wheels to move. By adopting the distributed electric drive system of any of the above embodiments, a height difference design is formed between the first drive device 2 and the second drive device 3, the reduction device 1 is installed between the first drive device 2 and the second drive device 3, and the space between the first drive device 2, the second drive device 3 and the reduction device 1 is fully utilized to effectively reduce the height dimension of the electric drive system. Furthermore, the space between the first drive device 2 and the second drive device 3 is fully utilized in combination with the corresponding structural design, thereby effectively reducing the axial dimension of the electric drive system.

[0092] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and the utility model concept of the utility model, and all these changes or substitutions should fall within the protection scope of the utility model.

Claims

1. A distributed electric drive system, characterized in that: include: A reduction device, wherein two opposite sides of the reduction device are respectively provided with a first input end and a second input end; A first driving device and a second driving device are located at opposite sides of the reduction device, the first driving device is connected to the first input end, the second driving device is connected to the second input end, and the reduction device, the first driving device and the second driving device enclose an accommodating space; The controller has a first mounting portion, which is installed in the accommodating space and corresponds to the reduction device up and down.

2. The distributed electric drive system according to claim 1, characterized in that: The corresponding two ends of the deceleration device are a first end and a second end. One end of the first mounting portion is installed in the accommodating space and is arranged corresponding to the first end. The controller also has a second mounting portion, and the second mounting portion is arranged on opposite sides of the other end of the first mounting portion. The two second mounting portions are located on opposite sides of the second end.

3. The distributed electric drive system according to claim 2, characterized in that: A groove is enclosed between the first mounting portion and the second mounting portions arranged on both sides, and the second end of the deceleration device is at least partially located in the groove.

4. The distributed electric drive system according to claim 2, characterized in that: The first input end and the second input end are correspondingly located at two opposite sides of the first end, and the first output end and the second output end are correspondingly disposed at two opposite sides of the second end; It also includes a first output shaft and a second output shaft, the first output shaft is used to connect the first output end with the wheel, the second output shaft is used to connect the second output end with the wheel, one of the second mounting parts corresponds to the first output shaft up and down, and the other second mounting part corresponds to the second output shaft up and down.

5. The distributed electric drive system according to claim 2, characterized in that: Also includes: A first electrical connector and a second electrical connector, wherein the first electrical connector is located above the axial center line of the first drive device and is arranged opposite to the second mounting portion arranged on the same side, and the first electrical connector is used to connect the first drive device and the second mounting portion arranged on the same side, and the second electrical connector is located above the axial center line of the second drive device and is arranged opposite to the second mounting portion arranged on the same side, and the second electrical connector is used to connect the second drive device and the second mounting portion arranged on the same side.

6. The distributed electric drive system according to claim 5, characterized in that: A first opening is provided on a side above the axial centerline of the first driving device and facing the first electrical connector, and a second opening is provided on the second mounting portion located on the same side as the first driving device, the first opening and the second opening are arranged opposite to each other, one side of the first electrical connector is connected to the first driving device through the first opening, and the other side of the first electrical connector is connected to the second mounting portion arranged on the same side through the second opening; A third opening is provided on a side above the axial center line of the second driving device and facing the second electrical connector, and a fourth opening is provided on the second mounting portion located on the same side as the second driving device. The third opening and the fourth opening are arranged opposite to each other, one side of the second electrical connector is connected to the second driving device through the third opening, and the other side of the second electrical connector is connected to the second mounting portion arranged on the same side through the fourth opening.

7. The distributed electric drive system according to claim 1, characterized in that: A reducer is correspondingly arranged on two opposite sides of the reduction device, the reducer on one side is provided with the first input end, and the reducer on the other side is provided with the second input end, and the two reducers are arranged in a centrally symmetrical manner or translated along the opposite sides of the reduction device.

8. The distributed electric drive system according to claim 7, characterized in that: The reducer includes a primary reduction gear group and a secondary reduction gear group. The primary reduction gear group is located at one of the corresponding ends of the reduction device, and the secondary reduction gear group is located at the other end of the corresponding ends of the reduction device. The output end of the primary reduction gear group is transmission-connected to the input end of the secondary reduction gear group and is coaxially arranged.

9. The distributed electric drive system according to claim 8, characterized in that: The primary reduction gear set is provided with the first input end, the secondary reduction gear set is provided with the first output end, and the primary reduction gear set is arranged closer to the first driving device than the secondary reduction gear set.

10. The distributed electric drive system according to claim 7, characterized in that: It also includes a locking mechanism, which is connected between the two reducers. The locking mechanism transmits the decelerated power on one side to the reducer on the other side by engaging the two reducers.

11. The distributed electric drive system according to claim 10, characterized in that: It also includes a first input shaft and a second input shaft, the first input shaft is transmission-connected between the first drive device and the reducer on the corresponding side, the second input shaft is transmission-connected between the second drive device and the reducer on the corresponding side, and the locking mechanism is arranged between the first input shaft and the second input shaft; The locking mechanism includes a synchronizer.

12. The distributed electric drive system according to any one of claims 1 to 11, characterized in that: Also includes: An oil pump assembly device is arranged below the first mounting portion and between the first drive device and the second drive device. The tops of the first drive device and the second drive device both protrude upward relative to the top of the oil pump assembly device. The oil pump assembly device is used to transport cooling oil to the first drive device and the second drive device.

13. The distributed electric drive system according to claim 12, characterized in that: A reducer housing is provided on the outside of the reduction device, and the reducer housing is concavely provided with a mounting groove, and the oil pump assembly device is installed in the mounting groove.

14. The distributed electric drive system according to any one of claims 1 to 11, characterized in that: Also includes: A sensor device, wherein the sensor device is electrically connected to the first drive device and the second drive device, and is used to sense and obtain working state parameters of the first drive device and the second drive device. The sensor device is arranged above the reduction device, and the sensor device corresponds to the reduction device up and down and is located between the first drive device and the second drive device.

15. The distributed electric drive system according to any one of claims 1 to 11, characterized in that: The electrical connection line between the first driving device and the second driving device is integrally installed between the first driving device and the second driving device; and / or The controller comprises a controller housing, and the controller housing is T-shaped.

16. A vehicle, characterized in that: It includes a vehicle body, wheels and an electric drive system, wherein the wheels are mounted on the vehicle body, and the electric drive system includes a distributed electric drive system as described in any one of claims 1 to 11, and the distributed electric drive system is used to drive the two wheels to move.

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