A vehicle drive motor and an automobile

Abstract

The present invention discloses a vehicle-mounted drive motor and an automobile. The vehicle-mounted drive motor includes a motor body and a junction box provided on the motor body. A wiring board is provided inside the junction box. A high-voltage wire harness of the motor body is introduced into the junction box and is provided with a high-voltage terminal. The junction box is provided with a cable fixing head for accessing a controller wire harness. A connection end of the controller wire harness passes through the cable fixing head and is locked with the high-voltage terminal on the wiring board through a locking member. A heat insulation plate is provided at the connection between the junction box and the motor body. The heat insulation plate separates the internal spaces of the motor body and the junction box. An elastic pressing plate is provided inside the junction box, and the elastic pressing plate presses on the connection end of the locked controller wire harness, the locking member, and the high-voltage terminal. By optimizing the structure inside the junction box, the motor achieves the purpose of preventing condensation.

Description

Technical Field

[0001] The present invention relates to the technical field of drive motors, and particularly to in-vehicle drive motors for vehicles such as electric vehicles and hybrid vehicles. The present invention also relates to a vehicle provided with the in-vehicle drive motor. Background Art

[0002] The junction box is one of the important components of the motor structure. The stator busbar wiring harness of the motor and the connecting wire of the controller are mainly transferred and transitioned through the junction box, which has high requirements for insulation sealing and anti-condensation problems.

[0003] The structure of a water-cooled motor is usually divided into a motor body and a junction box. Usually, the two are connected and penetrated in space. During the operation of the motor, the temperature of the winding rises, and the heat causes the temperature inside the motor and the junction box to rise through convection and radiation. After the motor stops running, the ambient temperature causes the housing to cool down quickly. Among them, the inside of the junction box cools down faster than the motor body with the stator winding, and the two cool down faster than the air inside the motor. In this way, a large temperature difference will be generated between the inside of the motor body and the inside of the junction box, and the water vapor will directly liquefy and condense into dew on the surface of the cooler housing, that is, the motor condensation phenomenon.

[0004] During the actual use of the in-vehicle motor, there are strict requirements for the motor condensation problem. Motor condensation will cause the insulation resistance value between the three-phase lines of the motor to decrease, resulting in an alarm from the motor controller or a short circuit between the three-phase lines, and the motor will be burned out.

[0005] The traditional anti-condensation measures mainly include the following:

[0006] First, spray "three-proof" paint at the junction board. This preventive measure has the risk of peeling of the insulating paint and does not fundamentally solve the condensation problem.

[0007] Second, install a drying device inside the junction box. In the process of random vibration of the motor, the desiccant particles may scatter, bringing potential hazards to the performance of the motor and having poor maintainability.

[0008] Third, add an electronic dehumidification device. This preventive measure will cause the overall cost of the motor to be too high, bringing an additional cost burden to the motor. Summary of the Invention

[0009] The purpose of the present invention is to provide an in-vehicle drive motor. By optimizing the structure inside the junction box, the purpose of motor anti-condensation is achieved.

[0010] Another object of the present invention is to provide a vehicle provided with the in-vehicle drive motor.

[0011] To achieve the above object, the present invention provides a vehicle drive motor, which includes a motor body and a junction box provided on the motor body. A wiring board is provided inside the junction box. A high-voltage wire harness of the motor body is introduced into the junction box and is provided with a high-voltage terminal. The junction box is provided with a cable fixing head for accessing the controller wire harness. The connection end of the controller wire harness passes through the cable fixing head and is locked with the high-voltage terminal on the wiring board through a locking member. An insulating board is provided at the connection part between the junction box and the motor body. The insulating board separates the internal spaces of the motor body and the junction box; an elastic pressing plate is provided inside the junction box, and the elastic pressing plate presses on the connection end of the locked controller wire harness, the locking member, and the high-voltage terminal.

[0012] Optionally, a contoured concave part for accommodating at least a part of the top of the connection end of the controller wire harness, the locking member, and the high-voltage terminal is provided on the lower surface of the elastic pressing plate; and / or, a notch part is provided on one side of the elastic pressing plate adjacent to the cable fixing head.

[0013] Optionally, the elastic pressing plate is provided with outward flanging on both sides, and screw holes are provided on the outward flanging. The elastic pressing plate is fixed inside the junction box by screws.

[0014] Optionally, the insulating board is clamped between the junction box and the motor body.

[0015] Optionally, the insulating board is provided with a through hole for the high-voltage wire harness to pass through. The diameter of the through hole is smaller than the diameter of the high-voltage wire harness, and the high-voltage wire harness passes through the through hole and has an interference fit with the through hole.

[0016] Optionally, the locking member is a locking bolt; and / or, a copper row is provided at the connection end of the controller wire harness.

[0017] Optionally, the elastic pressing plate and the insulating board are made of flexible materials.

[0018] Optionally, the elastic pressing plate and the insulating board are made of silicone rubber.

[0019] Optionally, the junction box is provided with a breather plug.

[0020] To achieve the above another object, the present invention provides an automobile, which includes a vehicle body and a power system provided on the vehicle body. The power system is provided with a motor, wherein the motor is the vehicle drive motor described in any one of the above.

[0021] On the premise of ensuring the safety and performance of the vehicle-mounted drive motor provided by the present invention, by adding a heat insulation plate and an elastic pressing plate, the anti-condensation effect inside the motor junction box is achieved. Among them, the heat insulation plate can isolate the internal space of the motor body and the junction box, so that the heat of the motor winding cannot be transferred to the inside of the junction box. During the cooling process of the motor, there will be no large temperature difference between the junction box and the motor body, and the water vapor in the motor winding cannot be transferred into the junction box, ensuring the relative humidity and pressure inside the junction box cavity and effectively preventing the occurrence of motor condensation. On this basis, even if condensation occurs, since the elastic pressing plate is tightly pressed on the connection ends of the locked controller wiring harness, the locking components, and the high-voltage terminals, it can prevent the generated condensation from contacting the three components, realizing the isolation function of condensation, and thus realizing the anti-condensation function of the motor. It can be seen that the anti-condensation means adopted by the present invention is mainly mechanical in structure, and moreover, it is not a single form. This multiple protection means can not only effectively prevent the generation of condensation, but also isolate the influence of condensation on the three-phase lines of the motor.

[0022] The vehicle provided by the present invention is equipped with the vehicle-mounted drive motor. Since the vehicle-mounted drive motor has the above technical effects, the vehicle equipped with this vehicle-mounted drive motor should also have corresponding technical effects. Description of the Drawings

[0023] Figure 1 is a top view of a vehicle-mounted drive motor provided by an embodiment of the present invention after removing the top cover of the junction box;

[0024] Figure 2 is Figure 1 the A-A view of

[0025] Figure 3 is Figure 2 the B-B view of

[0026] In the figure:

[0027] 1. Motor body 2. Junction box 3. Wiring board 4. Boss 5. High-voltage wiring harness 6. High-voltage terminal 7. Cable fixing head 8. Locking bolt 9. Elastic pressing plate 10. Concave part 11. Notch part 12. Heat insulation plate 13. Through hole Detailed Embodiments

[0028] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0029] In this text, terms such as "upper, lower, inner, outer" are established based on the positional relationships shown in the drawings. Depending on the different drawings, the corresponding positional relationships may also change accordingly. Therefore, they should not be understood as absolute limitations on the scope of protection. Moreover, relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0030] Please refer to Figure 1 、 Figure 2 、 Figure 3 , Figure 1 is a top view of a vehicle-mounted drive motor provided by an embodiment of the present invention after removing the top cover of the junction box; Figure 2 is Figure 1 the A-A view of Figure 3 is Figure 2 the B-B view of

[0031] As shown in the figure, in a specific embodiment, the vehicle-mounted drive motor provided by the present invention mainly consists of parts such as a motor body 1 and a junction box 2. Among them, the junction box 2 is usually fixedly connected to the top of the motor body 1, and its main function is to transfer and transition the motor stator busbar wiring harness and the controller connection wire.

[0032] Inside the junction box 2, there is a wiring board 3. On the inner bottom of the junction box 2, there are a plurality of bosses 4 distributed at intervals. The wiring board 3 is supported by the bosses 4 so that the wiring board 3 is kept at a certain distance from the inner bottom of the junction box 2. After the high-voltage wiring harness 5 of the motor body 1 is introduced into the junction box 2 from the bottom of the junction box 2, it is connected with a high-voltage terminal 6. The junction box 2 is provided with a plurality of cable fixing heads 7 (commonly known as gland heads) for accessing the controller wiring harness (not shown in the figure). After the connecting end of the controller wiring harness passes through the cable fixing head, there is a copper bar, and the copper bar is locked on the wiring board 3 together with the high-voltage terminal 6 through a locking bolt 8.

[0033] After the controller wiring harness passes through the cable fixing head 7 and is locked with the high-voltage terminal 6 on the wiring board 3 through the locking bolt 8, at this time, the copper bar of the controller wiring harness, the locking bolt 8 and the outer surface of the high-voltage terminal 6 are in a bare state inside the junction box 2. After condensation occurs, the dripping water droplets converge here and are doped with conductive impurities, which will cause the insulation resistance value between the three-phase lines to decrease, and then cause the controller to alarm and even burn out the motor.

[0034] In response to this, the present invention is provided with an elastic pressing plate 9 inside the junction box 2. This elastic pressing plate 9 presses tightly on the copper bar, locking bolt 8, and high-voltage terminal 6 of the locked controller wiring harness, and is firmly adhered to the three of them. In this way, the outer surfaces of the copper bar of the motor controller wiring harness, the locking bolt 8, and the high-voltage terminal 6 are enclosed. After condensation occurs, the dripping water droplets are isolated outside the protective layer, preventing the generated condensation from coming into contact with the three, realizing the isolation function of condensation, thereby realizing the anti-condensation function of the motor, effectively preventing the reduction of the insulation resistance value between the three-phase lines, and achieving the purpose of protecting the motor.

[0035] Specifically, the elastic pressing plate 9 can be made of flexible materials such as silicone rubber. It has outward-turned edges on both sides, and screw holes are provided on the outward-turned edges. The elastic pressing plate 9 is fixed inside the junction box 2 by screws.

[0036] After the flexible elastic pressing plate 9 presses tightly on the copper bar, locking bolt 8, and high-voltage terminal 6, it can generate appropriate elastic deformation by itself, thereby tightly covering the copper bar, locking bolt 8, and high-voltage terminal 6.

[0037] Furthermore, a contoured concave part 10 can be provided on the lower surface of the elastic pressing plate 9. The shape of this concave part 10 is similar to the top shapes of the copper bar, locking bolt 8, and high-voltage terminal 6 it covers. After the elastic pressing plate 9 presses tightly on the three, at least a part of the tops of the copper bar, locking bolt 8, and high-voltage terminal 6 enters the corresponding concave part 10, thereby realizing the tight enclosure of the elastic pressing plate 9 on the three, and avoiding voids that may lead to the failure of protection.

[0038] In addition, a notch part 11 is provided on one side of the elastic pressing plate 9 adjacent to the cable fixed head 7. Since the diameter of the controller wiring harness is larger than the thickness of the copper bar, by designing the notch part, it can be avoided that the elastic pressing plate 9 is lifted by the controller wiring harness and causes the phenomenon of warping, which may further lead to poor sealing, and can further improve the tightness of pressing and ensure the isolation effect.

[0039] While the elastic pressing plate 9 is provided, a heat insulation plate 12 is also provided at the connection between the junction box 2 and the motor body 1. This heat insulation plate 12 can also be made of flexible materials such as silicone rubber. It is located at the bottom of the junction box 2 and is clamped between the junction box 2 and the motor body 1.

[0040] Specifically, the heat insulation plate 12 is provided with a through hole 13 for the high-voltage wiring harness to pass through, and the diameter of the through hole 13 is smaller than the diameter of the high-voltage wiring harness. After the high-voltage wiring harness passes through the through hole 13, it has an interference fit with the through hole 13, so that no gap will be generated between the two, avoiding the internal communication between the inside of the motor body 1 and the inside of the junction box 2.

[0041] By setting the heat insulation board 12, the internal spaces of the motor body 1 and the junction box 2 can be separated, so that the heat of the motor winding cannot be transferred to the inside of the junction box 2. During the cooling process of the motor, there will be no large temperature difference between the junction box 2 and the motor body 1, and the water vapor in the motor winding cannot be transferred to the inside of the junction box 2. At the same time, due to the breathing plug provided on the junction box 2, the relative humidity and pressure inside the junction box 2 can be guaranteed under the action of the breathing plug, effectively preventing the occurrence of motor condensation.

[0042] The above embodiments are only the preferred solutions of the present invention, and are not specifically limited thereto. On this basis, targeted adjustments can be made according to actual needs to obtain different implementation manners. For example, other connecting components other than the copper bar are provided at the connecting end of the controller wire harness, or other methods are used to lock the connecting end of the high-voltage terminal 6 and the controller wire harness, and so on. Since there are many possible implementation manners, they will not be listed one by one here.

[0043] After adopting the above structure, during the operation and cooling process of the motor, it can effectively prevent the internal circulation between the motor body 1 and the junction box 2 and generate a large temperature difference, avoid the water vapor in the motor body 1 flowing into the junction box 2, and effectively prevent the generation of condensation; at the same time, an elastic pressing plate 9 is added at the exposed part of the circuit to effectively protect the exposed part of the wiring, effectively prevent the insulation resistance value between the three-phase wires of the motor from decreasing, and avoid the problems caused by motor condensation.

[0044] In addition, the structures of the elastic pressing plate 9 and the heat insulation board 12 do not affect the internal structure and performance of the motor junction box. At the same time, the costs of the two structures are low. On the premise of ensuring the low cost of the motor, the problem of motor anti-condensation is effectively solved.

[0045] In addition to the above vehicle-mounted drive motor, the present invention also provides a vehicle, which can be a pure electric vehicle or a hybrid vehicle specifically. It has a vehicle body and a power system provided on the vehicle body. The power system is provided with a motor. Among them, the motor is the vehicle-mounted drive motor described above. For the remaining structures of the vehicle, please refer to the prior art and will not be elaborated herein.

[0046] The above has introduced the vehicle-mounted drive motor and vehicle provided by the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A vehicle-mounted drive motor, comprising a motor body (1) and a junction box (2) provided on the motor body (1). A wiring board (3) is provided inside the junction box (2). A plurality of bosses (4) spaced apart from each other are provided on the inner bottom of the junction box (2), and the wiring board (3) is supported by the bosses (4). A high-voltage wire harness of the motor body (1) is introduced into the junction box (2) and is provided with a high-voltage terminal (6). The junction box (2) is provided with a cable fixing head (7) for connecting to a controller wire harness. The connecting end of the controller wire harness passes through the cable fixing head (7) and is locked with the high-voltage terminal (6) on the wiring board (3) through a locking member, characterized in that, A heat insulation plate (12) is provided at the connection between the junction box (2) and the motor body (1), and the heat insulation plate (12) separates the internal spaces of the motor body (1) and the junction box (2); an elastic pressing plate (9) is provided in the junction box (2), and the elastic pressing plate (9) presses against the connection end of the controller wire harness, the locking member, and the high-voltage terminal (6) which are locked; A profiling concave part (10) for accommodating at least a part of the tops of the connection end of the controller wire harness, the locking member, and the high-voltage terminal (6) is provided on the lower surface of the elastic pressing plate (9); and / or, a notch part (11) is provided on one side of the elastic pressing plate (9) adjacent to the cable fixing head (7); The heat insulation plate (12) is clamped between the junction box (2) and the motor body (1), and the heat insulation plate (12) is provided with a through hole (13) for the high-voltage wire harness to pass through, the diameter of the through hole (13) is smaller than the diameter of the high-voltage wire harness, and the high-voltage wire harness passes through the through hole (13) and is in interference fit with the through hole (13); The elastic pressing plate (9) and the heat insulation plate (12) are made of flexible materials.

2. The in-vehicle drive motor according to claim 1, wherein Outward flanging is provided on both sides of the elastic pressing plate (9), screw holes are provided on the outward flanging, and the elastic pressing plate (9) is fixed to the inside of the junction box (2) by screws.

3. The in-vehicle drive motor according to claim 1, wherein The locking member is a locking bolt (8); and / or, a copper bar is provided at the connection end of the controller wire harness.

4. The vehicle-mounted drive motor according to claim 1, wherein The elastic pressing plate (9) and the heat insulation plate (12) are made of silicone rubber.

5. The in-vehicle drive motor according to any one of claims 1 to 4, characterized in that The junction box (2) is provided with a breather plug.

6. An automobile, comprising a vehicle body and a power system provided on the vehicle body, wherein the power system is provided with an electric motor, characterized in that, The motor is the vehicle-mounted drive motor according to any one of claims 1 to 5 above.

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