Electric vehicle driving system and electric tricycle

Abstract

The utility model provides an electric vehicle driving system and electro-tricycle, the electric vehicle driving system includes differential speed reducer, controller and mounting tray, differential speed reducer includes shell and a plurality of mounting portion, the mounting portion is provided on the outer side of shell, mounting tray includes bottom plate and side guard plate, side guard plate has a plurality of fixed ear portion, the fixed ear portion is fixed on the bottom plate. The installation parts and the fixing lug parts are arranged in a one-to-one correspondence mode, the fixing lug parts are detachably installed on the installation parts, and the controller is detachably arranged on the bottom plate. According to the utility model, the assembly efficiency and the maintenance convenience can be improved, and the production and maintenance cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle power technology, specifically to an electric vehicle drive system and an electric tricycle. Background Technology

[0002] In the development of electric tricycle drive systems, to achieve compactness and integration, related technologies commonly employ a design that integrates the controller, motor, or differential reducer within the same housing. While this design saves space to some extent, during production and assembly, the tight integration of components leads to complex installation and connections, requiring highly skilled operators, resulting in low production efficiency and increased costs. Furthermore, during maintenance, if a component malfunctions, it is often difficult to disassemble individually, necessitating the removal of the entire integrated structure or even direct replacement. This significantly increases maintenance difficulty and costs, reducing the vehicle's economic viability. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide an electric vehicle drive system and an electric tricycle, which can improve assembly efficiency and maintenance convenience, and help reduce production and maintenance costs.

[0004] The electric vehicle drive system provided by this utility model includes a differential reducer, a controller, and a mounting tray. The differential reducer includes a housing and multiple mounting parts. The mounting parts are located on the outside of the housing. The mounting tray includes a base plate and a side guard plate. The side guard plate has multiple fixing ears. The mounting parts and the fixing ears are arranged one-to-one. The fixing ears are detachably mounted on the mounting parts. The controller is detachably located on the base plate.

[0005] In summary, the electric vehicle drive system provided by this utility model detachably installs the controller to the outside of the differential reducer, which not only significantly improves assembly efficiency and maintenance convenience, but also helps to reduce production and maintenance costs.

[0006] In some embodiments, the electric vehicle drive system further includes a fixing stud, and both the mounting portion and the fixing lug are provided with two studs. The mounting portion is provided with a threaded hole, and the fixing lug is provided with a through hole. One end of the fixing stud passes through the through hole and is screwed to the threaded hole to fix the mounting tray to the mounting portion.

[0007] In some embodiments, the mounting portion includes a mounting post and a plurality of reinforcing ribs, the differential reducer has a drive shaft, one end of the mounting post is connected to the housing, the mounting post extends along the axial direction of the drive shaft, and the plurality of reinforcing ribs are spaced apart on the outer side of the mounting post.

[0008] In some embodiments, the base plate and the side guard plate are configured as an integral structure.

[0009] In some embodiments, the mounting tray further includes a connecting column, the base plate has a positioning hole, the side guard plate has a mounting hole, and one end of the connecting column passes through the mounting hole and the positioning hole to fix the side guard plate and the base plate.

[0010] In some embodiments, the mounting tray further includes a first partition and a second partition, the bottom plate is provided with a drainage hole, the first partition and the second partition are spaced apart on the inner wall of the drainage hole in the hole direction, and the first partition and the second partition divide the drainage hole to form an S-shaped flow channel.

[0011] In some embodiments, the controller includes an upper housing that is detachably mounted on the base plate. The upper housing is provided with a wiring harness platform and a wiring harness connector. The wiring harness platform is inclined downward in the direction of the wiring harness connector toward the edge of the upper housing, and the inclination angle of the wiring harness platform is set to 1° to 2°.

[0012] In some embodiments, the controller further includes a waterproof strip and a protective cover, the waterproof strip surrounding the outside of the wiring harness connector and the protective cover covering the outside of the wiring harness connector.

[0013] In some embodiments, the electric vehicle drive system further includes a motor, and the motor and the controller are respectively located on opposite sides of the housing.

[0014] In addition, the present invention provides an electric tricycle, which includes the electric vehicle drive system of any of the above embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an electric vehicle drive system provided in an embodiment of the present invention.

[0016] Figure 2 This is a three-dimensional schematic diagram of an electric vehicle drive system provided in an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the structure of an electric vehicle drive system with the connection harness removed, according to an embodiment of the present invention.

[0018] Figure 4 This is a top view of the controller and mounting tray in an electric vehicle drive system according to an embodiment of the present invention.

[0019] Figure 5 This is a three-dimensional schematic diagram of the mounting tray in an electric vehicle drive system according to an embodiment of the present invention.

[0020] Figure 6 This is a schematic diagram of the drainage hole in the mounting tray of an electric vehicle drive system according to an embodiment of the present invention.

[0021] Figure 7 yes Figure 4 The controller and mounting tray shown are illustrated in a cross-sectional view along AA.

[0022] Figure label:

[0023] 10. Differential reducer; 11. Housing; 12. Mounting part; 122. Mounting post; 123. Reinforcing rib; 13. Drive shaft;

[0024] 20. Controller; 21. Upper shell; 211. Wiring harness platform; 212. Wiring harness connector; 22. Sealing strip; 23. Waterproof strip; 24. Protective cover;

[0025] 30. Mounting tray; 31. Base plate; 311. Drain hole; 312. First partition; 313. Second partition; 314. Flow channel; 315. Sealing groove; 316. First side; 317. Second side; 318. Heat sink; 32. Side guard plate; 321. Fixing lug; 322. Through hole;

[0026] 41. Fixing studs; 42. Power harness; 43. Vehicle wiring harness; 44. Magnetic braided wiring harness; 45. Three-phase wire;

[0027] 50. Electric motor; 60. Wheel. Detailed Implementation

[0028] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] like Figures 1 to 7 As shown, one embodiment of the present invention provides an electric vehicle drive system, which includes a differential reducer 10, a controller 20, and a mounting tray 30. The differential reducer 10 includes a housing 11 and a plurality of mounting portions 12. The mounting portions 12 are located on the outside of the housing 11. The mounting tray 30 includes a base plate 31 and a side guard plate 32. The side guard plate 32 has a plurality of fixing ears 321. The mounting portions 12 and the fixing ears 321 are arranged in a one-to-one correspondence. The fixing ears 321 are detachably mounted on the mounting portions 12. The controller 20 is detachably mounted on the base plate 31.

[0030] Specifically, the differential reducer 10 can drive the wheel 60 to rotate via the drive shaft 13. The mounting tray 30 is detachably mounted to the outside of the housing 11 via the mounting part 12, thereby providing a stable mounting position for the controller 20 and facilitating the disassembly and maintenance of the controller 20. The side guard plate 32 of the mounting tray 30 is provided with multiple fixing ears 321, each corresponding to a mounting part 12. A quick and stable connection between the mounting tray 30 and the differential reducer 10 can be achieved through detachable connections such as bolts and clips.

[0031] The controller 20 is detachably mounted on the base plate 31, enabling modular integration of the controller 20 and the differential reducer 10. This facilitates electrical connection and signal transmission between the two, and also allows for separate maintenance and upgrades of the controller 20. When the controller 20 malfunctions or needs to be replaced, it can simply be removed from the mounting tray 30 for repair or replacement, without requiring extensive disassembly of the entire drive system, significantly reducing maintenance costs and time.

[0032] In summary, the electric vehicle drive system provided by this utility model detachably installs the controller 20 to the outside of the differential reducer 10, which not only significantly improves assembly efficiency and maintenance convenience, but also helps to reduce production and maintenance costs.

[0033] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment, the electric vehicle drive system also includes a fixing stud 41. The mounting part 12 and the fixing ear 321 are both provided with two studs. The mounting part 12 is provided with a threaded hole, and the fixing ear 321 is provided with a through hole 322. One end of the fixing stud 41 passes through the through hole 322 and is screwed to the threaded hole to fix the mounting tray 30 to the mounting part 12, thereby realizing the installation and fixation of the mounting tray 30.

[0034] The mounting portion 12 and the fixing ear 321 are both provided in pairs, which ensures the stability of the connection and avoids the complexity and cost increase caused by too many connection points. In addition, the two mounting portions 12 are symmetrically arranged on the outside of the housing 11 of the differential reducer 10, while the two fixing ears 321 are correspondingly arranged on the side guard plate 32 of the mounting tray 30, thus forming a one-to-one correspondence layout, which facilitates the installation and fixing of the mounting tray 30.

[0035] During the assembly of the mounting tray 30, the operator only needs to align the through hole 322 on the mounting tray 30 with the threaded hole of the mounting part 12; then, pass one end of the fixing stud 41 through the through hole 322 of the fixing ear 321 and screw it into the threaded hole of the mounting part 12; as the fixing stud 41 is gradually tightened, the connection between the mounting tray 30 and the differential reducer 10 becomes more and more stable, thus fixing the mounting tray 30.

[0036] like Figure 3 As shown, in some embodiments, the mounting part 12 includes a mounting post 122 and a plurality of reinforcing ribs 123. The differential reducer 10 has a drive shaft 13. One end of the mounting post 122 is connected to the housing 11, and the mounting post 122 extends along the axial direction of the drive shaft 13. The plurality of reinforcing ribs 123 are spaced apart on the outside of the mounting post 122 to ensure the structural strength of the mounting part 12.

[0037] One end of the mounting post 122 can be connected to the housing 11 of the differential reducer 10 to ensure a stable connection; the other end extends out and is provided with a threaded hole, thus providing a stable support platform for the mounting tray 30. Furthermore, the mounting post 122 extends along the axial direction of the drive shaft 13 of the differential reducer 10, so that the mounting tray 30 can be on the same horizontal plane as the differential reducer 10, avoiding affecting the chassis height of the electric vehicle.

[0038] The reinforcing ribs 123 are spaced around the mounting column 122, forming a stable support structure. This not only significantly enhances the bending and torsional resistance of the mounting column 122, but also effectively disperses the stress exerted on the mounting column 122 by components such as the mounting tray 30 and the controller 20, thereby extending the service life of the mounting column 122 and even the entire drive system.

[0039] Optionally, the reinforcing ribs 123 are arranged around the mounting column 122 at equal angles, thereby forming a symmetrical support structure, so that the stress distribution in each direction is uniform when the mounting column 122 is subjected to radial loads (such as vibration and impact).

[0040] It should be noted that in some embodiments, the base plate 31 and the side guard plate 32 may be an integral structure. In other embodiments, the mounting tray 30 may be a separate structure, that is, the mounting tray 30 may include a connecting column, the base plate 31 is provided with positioning holes, the side guard plate 32 is provided with mounting holes, and one end of the connecting column passes through the mounting holes and positioning holes to fix the side guard plate 32 and the base plate 31. In this embodiment, the base plate 31 and the side guard plate 32 are an integral structure.

[0041] like Figure 4 , Figure 5 and Figure 6As shown, in some embodiments, the mounting tray 30 further includes a first partition 312 and a second partition 313. The bottom plate 31 is provided with a drainage hole 311. The first partition 312 and the second partition 313 are spaced apart on the inner wall of the drainage hole 311 in the hole direction. The first partition 312 and the second partition 313 divide the drainage hole 311 to form an S-shaped flow channel 314.

[0042] When liquids (such as rainwater, cleaning water, etc.) appear on the mounting tray 30, these liquids can drip smoothly down to the ground along the S-shaped flow channel 314 in the drain hole 311. This not only ensures that the liquid can be effectively drained from the tray, avoiding problems such as corrosion and bacterial growth that may be caused by the liquid accumulating on the tray for a long time, but also makes the liquid drainage process more stable and orderly, reducing the splashing and scattering that may occur when the liquid drips, thereby better protecting the controller 20.

[0043] Furthermore, in the event of standing water on the ground, it is difficult for the water to flow backward into the mounting tray 30 through the S-shaped flow channel 314. This is because the curved structure of the S-shaped channel increases the resistance and difficulty of reverse liquid flow, making it difficult for standing water to overcome this resistance and smoothly enter the tray. This improves the waterproof performance and stability of the mounting tray 30, especially in environments where standing water is common. It effectively prevents water from damaging the controller 20, thereby greatly enhancing the reliability and safety of the mounting tray 30 in actual use.

[0044] like Figure 4 , Figure 7 As shown, in some embodiments, the controller 20 includes an upper housing 21, which is detachably mounted on the base plate 31. The upper housing 21 is provided with a wiring harness platform 211 and a wiring harness connector 212. The wiring harness platform 211 is inclined downward in the direction of the wiring harness connector 212 toward the edge of the upper housing 21.

[0045] Specifically, the upper shell 21 can be detachably mounted on the base plate 31, making the assembly and maintenance of the controller 20 more flexible and convenient. Users can easily remove the upper shell 21 from the base plate 31 as needed to inspect, repair, or replace internal components, greatly improving the maintainability and service life of the controller 20.

[0046] Optionally, the connection between the upper shell 21 and the base plate 31 can be a threaded structure or a snap-fit ​​structure.

[0047] The wiring harness platform 211 is mainly used to set the wiring harness connector 212. The wiring harness connector 212 is a key component for connecting external devices and the internal circuitry of the controller 20. Through this interface, the controller 20 can receive signals from external devices and also output its own control signals to external devices, thereby achieving precise control of the entire system.

[0048] The wiring harness platform 211 is inclined downwards in the direction towards the edge of the upper shell 21, which can prevent liquids (such as rainwater, cleaning water, etc.) from accumulating on the platform to a certain extent, avoiding problems such as short circuits or corrosion that may be caused by liquid accumulation, thereby further improving the stability and safety of the controller 20.

[0049] Optionally, the tilt angle of the wire harness platform 211 is set to 1° to 2°, such as 1°, 1.5°, 2°, etc.

[0050] Furthermore, the controller 20 also includes a sealing strip 22. A sealing groove 315 is provided on the base plate 31, and the sealing strip 22 is installed within the sealing groove 315, abutting against the upper shell 21. When the upper shell 21 is installed on the base plate 31, the sealing strip 22 is subjected to pressure from the upper shell 21, resulting in elastic deformation. This elastic deformation allows the sealing strip 22 to tightly fill the tiny gap between the upper shell 21 and the base plate 31, forming a reliable sealing barrier. In this way, the cavity formed by the upper shell 21 and the base plate 31 can be effectively sealed, preventing external dust, moisture, gas, etc., from entering the cavity, thereby protecting the electronic components inside the controller 20 from the influence of the external environment.

[0051] like Figure 3 , Figure 4 As shown, in some embodiments, the controller 20 further includes a water-proof strip 23, which surrounds the outside of the wire harness connector 212, thereby forming a waterproof barrier around the wire harness connector 212 of the controller 20 to prevent water from entering the interior of the controller 20 through the wire harness connector 212, and can also guide the flow of water to the drain hole 311 on the mounting tray 30.

[0052] Furthermore, the controller 20 also includes a protective cover 24, which is placed on the outside of the wire harness connector 212 so that the protective cover 24 can completely cover the wire harness connector 212, forming a closed protective space. This not only effectively blocks moisture and dust, but also prevents accidental collisions and damage to the wire harness connector 212 by external objects to a certain extent.

[0053] In this embodiment, the electric vehicle drive system may include power harness 42, vehicle harness 43, magnetic braided harness 44, three-phase wire 45, and other connecting harnesses. The controller 20, as the control unit of the electric vehicle drive system, is connected to all the connecting harnesses, including the power harness 42, vehicle harness 43, magnetic braided harness 44, and three-phase wire 45. Correspondingly, the controller 20 is equipped with multiple harness platforms 211, each corresponding to one of the power harness 42, vehicle harness 43, magnetic braided harness 44, and three-phase wire 45. Furthermore, a water-proof strip 23 may be provided between adjacent harness platforms 211. The water-proof strip 23 prevents water from entering the harness connector 212 and guides the flow of water.

[0054] It should be noted that multiple protective covers 24 may be provided, with each protective cover 24 covering the top of the wire harness connector 212. In another embodiment, a single protective cover 24 may be provided, which can be applied to the controller 20 where the wire harness connectors 212 are relatively concentrated, and can provide uniform protection for all wire harness connectors 212.

[0055] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the electric vehicle drive system also includes a motor 50. The motor 50 and the controller 20 are respectively located on opposite sides of the housing 11, thereby forming a certain spatial isolation between them and effectively reducing the direct impact of the heat generated by the motor 50 on the controller 20.

[0056] Furthermore, the base plate 31 has a first surface 316 and a second surface 317. The first surface 316 is used to install the upper shell 21 of the controller 20 and electronic components, and the second surface 317 is provided with heat sinks 318, which can effectively dissipate heat to the surrounding environment, ensure that the controller 20 operates within the normal operating temperature range, and provide additional heat dissipation protection under high load or high temperature environments.

[0057] Furthermore, one embodiment of this utility model also provides an electric tricycle, which includes the electric vehicle drive system provided in any of the above embodiments. It should be noted that the electric vehicle drive system provided in this application embodiment is applicable to electric tricycles; therefore, the implementation principles and technical effects not mentioned in the electric tricycle embodiment can be referred to the corresponding content in the foregoing electric vehicle drive system embodiments.

[0058] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0061] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] In this utility model, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An electric vehicle drive system, characterized by, The device includes a differential reducer, a controller, and a mounting tray. The differential reducer includes a housing and multiple mounting portions. The mounting portions are located on the outside of the housing. The mounting tray includes a base plate and a side guard plate. The side guard plate has multiple fixing ears. The mounting portions and the fixing ears are arranged in a one-to-one correspondence. The fixing ears are detachably mounted on the mounting portions. The controller is detachably mounted on the base plate.

2. The electric vehicle drive system of claim 1, wherein, It also includes a fixing stud, and both the mounting part and the fixing lug are provided with two studs. The mounting part is provided with a threaded hole, and the fixing lug is provided with a through hole. One end of the fixing stud passes through the through hole and is screwed to the threaded hole to fix the mounting tray to the mounting part.

3. The electric vehicle drive system of claim 1, wherein, The mounting part includes a mounting post and multiple reinforcing ribs. The differential reducer has a drive shaft. One end of the mounting post is connected to the housing. The mounting post extends along the axial direction of the drive shaft. Multiple reinforcing ribs are spaced apart on the outer side of the mounting post.

4. The electric vehicle drive system of claim 1, wherein, The base plate and the side guard plate are designed as an integral structure.

5. The electric vehicle drive system of claim 1, wherein, The mounting tray also includes a connecting column, the base plate is provided with a positioning hole, the side guard plate is provided with a mounting hole, and one end of the connecting column passes through the mounting hole and the positioning hole to fix the side guard plate and the base plate.

6. The electric vehicle drive system of claim 1, wherein, The mounting tray also includes a first partition and a second partition. The bottom plate is provided with a drainage hole. The first partition and the second partition are spaced apart on the inner wall of the drainage hole in the hole direction. The first partition and the second partition divide the drainage hole to form an S-shaped flow channel.

7. The electric vehicle drive system of claim 1, wherein, The controller includes an upper shell that is detachably mounted on the base plate. The upper shell is provided with a wiring harness platform and a wiring harness connector. The wiring harness platform is inclined downward in the direction of the wiring harness connector toward the edge of the upper shell, and the inclination angle of the wiring harness platform is set to 1° to 2°.

8. The electric vehicle drive system of claim 7, wherein, The controller also includes a water-proof strip and a protective cover. The water-proof strip surrounds the outside of the wire harness connector, and the protective cover covers the outside of the wire harness connector.

9. The electric vehicle drive system of claim 1, wherein, It also includes a motor, and the motor and the controller are respectively located on opposite sides of the housing.

10. An electric tricycle, characterized by The electric vehicle drive system includes any one of claims 1 to 9.

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