Oil-cooled motor and oil baffle thereof, and vehicle

Abstract

The utility model belongs to the cooling field of motor, specifically provides an oil -cooled motor and its oil baffle, vehicle. The radial outside of the rotating part of oil -cooled motor and located on the oil return path of cooling oil circuit to oil sump is equipped with the oil baffle, to be used for blocking the cooling oil of oil sump to splash to the rotating part of motor, and the oil baffle is the open -ended arc plate -like structure to the upwards, and is equipped with the oil return hole on the oil baffle for the cooling oil that flows back from cooling oil circuit to pass to return to the oil sump. The oil baffle is the oil baffle that the above -mentioned oil -cooled motor adopts. The vehicle includes above -mentioned oil -cooled motor. The oil -cooled motor in the utility model is equipped with the oil baffle, and the oil baffle is located at the radial outside of motor rotating part, can block the cooling oil that rises or splashes in the vehicle driving process because of acceleration, deceleration, road bumping and other reasons and the rotating part of motor contact, thereby avoided the additional friction that the cooling oil produced to the rotating part of motor, guaranteed that the motor has higher efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of motor cooling, and in particular relates to an oil-cooled motor and its oil baffle plate, and a vehicle. Background Technology

[0002] The drive motor is a core component of new energy vehicles, and its operational reliability directly affects the overall vehicle stability. To improve the power density of the motor, the industry is increasingly adopting motors cooled by cooling oil or a combination of oil and water cooling (hereinafter collectively referred to as oil-cooled motors). Because the cooling oil is insulating, it can directly contact the motor windings for heat dissipation, resulting in high heat dissipation efficiency. This allows for a larger electromagnetic load in the motor design, thereby reducing the motor's size and weight.

[0003] Oil-cooled motors typically have an internal oil passage structure and an oil sump at the bottom, along with components such as an oil pump and an oil cooler. The oil pump draws cooling oil from the oil sump and pumps it into the oil cooler for cooling. Afterward, the cooling oil flows into the cooling oil channels inside the motor to cool the windings at the ends and lubricate the bearings and oil seals. Subsequently, the cooling oil flows back into the oil sump under the influence of gravity.

[0004] To ensure proper extraction of coolant from the oil pan when the vehicle is at its extreme gradients (front and rear) and extreme tilt angles (left and right), the coolant level in the oil pan must be maintained at a certain height. During vehicle acceleration and deceleration, or on uneven road surfaces, the coolant may surge, slosh, or splash. This fluid will directly contact the rotating parts of the motor, increasing friction and reducing motor wear and efficiency. Utility Model Content

[0005] The purpose of this invention is to provide an oil-cooled motor to solve the technical problem in the prior art where the cooling oil inside the oil-cooled motor directly contacts the rotating parts of the motor, thus affecting the motor efficiency. Another purpose of this invention is to provide an oil baffle for an oil-cooled motor to solve the same technical problem.

[0006] Meanwhile, the purpose of this utility model is also to provide a vehicle that uses the above-mentioned oil-cooled motor to solve the same technical problem.

[0007] To achieve the above objectives, the technical solution for the oil-cooled motor provided by this utility model is as follows: An oil-cooled motor includes a housing, inside which a cooling oil passage and an oil sump are provided. An oil baffle is provided on the radially outer side of the rotating part of the motor and on the oil return path of the cooling oil passage to the oil sump to prevent the cooling oil in the oil sump from splashing onto the rotating part of the motor. The oil baffle is an arc-shaped plate structure with an upward opening, and the oil baffle is provided with an oil return hole for the cooling oil flowing back from the cooling oil passage to flow back to the oil sump.

[0008] As a further improvement, the oil return hole is located at the center of the width direction of the oil baffle, and the inner side of the oil baffle is provided with a guide surface for guiding the cooling oil to flow back to the center position.

[0009] As a further improvement, one end of the oil baffle is attached to the stator of the motor in the width direction, and the other end is provided with an inwardly protruding baffle to prevent cooling oil from overflowing from that end.

[0010] As a further improvement, the oil return hole is a funnel-shaped hole.

[0011] As a further improvement, the central angle of the oil baffle is in the range of 110°-130°.

[0012] This utility model is an improved invention, and its beneficial effects are as follows: The oil-cooled motor in this utility model is equipped with an oil baffle plate, which is located radially outside the rotating part of the motor. This baffle plate prevents cooling oil that surges or splashes during vehicle operation due to acceleration, deceleration, road bumps, etc., from contacting the rotating part of the motor. This avoids additional friction between the cooling oil and the rotating part of the motor, ensuring high motor efficiency. Cooling oil in the normal cooling circulation circuit, after falling onto the oil baffle plate, can flow back to the oil pan through the oil return hole of the baffle plate, ensuring normal oil cooling operation.

[0013] To achieve the above objectives, the technical solution for the oil baffle plate of the oil-cooled motor provided by this utility model is as follows: An oil baffle for an oil-cooled motor is provided. The oil baffle is an arc-shaped plate structure and is arranged radially outside the rotating part of the oil-cooled motor and located on the return path of the motor's cooling oil passage to the oil sump, so as to prevent the cooling oil in the oil sump from splashing onto the rotating part of the motor. The oil baffle is provided with a return hole for the cooling oil flowing back from the cooling oil passage to flow back to the oil sump.

[0014] As a further improvement, the oil return hole is located at the center of the width direction of the oil baffle, and the inner side of the oil baffle is provided with a guide surface for guiding the cooling oil to flow back to the center position.

[0015] As a further improvement, one end of the oil baffle in the width direction is used to contact the stator of the motor, and the other end is provided with an inwardly protruding baffle to prevent cooling oil from overflowing from that end.

[0016] As a further improvement, the oil return hole is a funnel-shaped hole.

[0017] As a further improvement, the central angle of the oil baffle is in the range of 110°-130°.

[0018] This utility model is a pioneering invention, and its beneficial effects are as follows: The oil baffle provided by this utility model can be used in oil-cooled motors. Specifically, during use, the oil baffle is located radially outside the rotating part of the motor, preventing the cooling oil that surges or splashes during vehicle operation due to acceleration, deceleration, road bumps, etc., from contacting the rotating part of the motor. This avoids additional friction between the cooling oil and the rotating part of the motor, ensuring high motor efficiency. After the cooling oil in the normal cooling circulation circuit falls onto the oil baffle, it can flow back to the oil pan through the oil return hole of the oil baffle, ensuring normal oil cooling.

[0019] To achieve the above objectives, the technical solution for the vehicle provided by this utility model is as follows: A vehicle includes a drive motor. The drive motor includes a housing, inside which a cooling oil passage and an oil sump are provided. An oil baffle is provided on the radially outer side of the rotating part of the motor and on the oil return path of the cooling oil passage to the oil sump to prevent the cooling oil in the oil sump from splashing onto the rotating part of the motor. The oil baffle is an arc-shaped plate structure with an upward opening, and the oil baffle is provided with an oil return hole for the cooling oil flowing back from the cooling oil passage to flow back to the oil sump.

[0020] As a further improvement, the oil return hole is located at the center of the width direction of the oil baffle, and the inner side of the oil baffle is provided with a guide surface for guiding the cooling oil to flow back to the center position.

[0021] As a further improvement, one end of the oil baffle is attached to the stator of the motor in the width direction, and the other end is provided with an inwardly protruding baffle to prevent cooling oil from overflowing from that end.

[0022] As a further improvement, the oil return hole is a funnel-shaped hole.

[0023] As a further improvement, the central angle of the oil baffle is in the range of 110°-130°.

[0024] This utility model is an improved invention, and its beneficial effects are as follows: The drive motor of the vehicle equipped with this utility model is provided with an oil baffle plate. The oil baffle plate is located radially outside the rotating part of the motor, which can prevent the cooling oil that surges or splashes during vehicle operation due to acceleration, deceleration, road bumps, etc., from contacting the rotating part of the motor. This avoids the additional friction generated by the cooling oil on the rotating part of the motor, ensuring that the motor has high efficiency. After the cooling oil in the normal cooling oil circulation circuit falls into the oil baffle plate, it can flow back to the oil pan through the oil return hole of the oil baffle plate, ensuring that oil cooling can proceed normally. Attached Figure Description

[0025] Figure 1 This is a cross-sectional view of an embodiment of the oil-cooled motor in this utility model; Figure 2This is an isometric view of an embodiment of the oil-cooled motor in this utility model; Figure 3 for Figure 1 Axonometric view of the center oil baffle; Figure 4 for Figure 1 Top view of the center oil baffle; Figure 5 for Figure 1 Cross-sectional view of the middle oil baffle.

[0026] Explanation of reference numerals in the attached figures: 1. Rear end cover; 2. Rotor; 3. Housing; 4. Stator; 5. Front end cover; 6. Bearing; 7. Oil seal; 8. Shaft; 9. Oil baffle; 10. Oil sump; 11. Oil pump; 12. Oil cooler; 100. Oil return path; 200. Liquid level; 901. Oil return hole; 902. Ramp; 903. Side flange. Detailed Implementation

[0027] To prevent the cooling oil that surges or splashes during vehicle operation from directly contacting the rotating parts of the motor, the basic technical concept of this utility model is to add an oil baffle to the oil-cooled motor to block the cooling oil. The oil baffle is located on the radial outer side of the rotating parts of the motor and on the cooling oil return path of the motor, so as to prevent the cooling oil from contacting the rotating parts while ensuring the normal return of the cooling oil.

[0028] Based on the above concept, the present invention will be further described in detail below with reference to the embodiments.

[0029] Specific implementation method of the oil-cooled motor provided by this utility model: The oil-cooled motor provided in this embodiment is specifically as follows: Figure 1 and Figure 2As shown, similar to a conventional oil-cooled motor, it includes a housing 3. A front cover 5 and a rear cover 1 are connected to the axial ends of the housing 3, respectively. Inside the housing 3 are a rotor 2 and a stator 4. The stator 4 is fixed relative to the housing 3, and the rotor 2 is located inside the stator 4. The motor's power output shaft, i.e., the rotating shaft 8, is connected to the rotor 2. To ensure the rotational stability of the rotating shaft 8, bearings 6 are fitted onto both ends of the rotating shaft 8 inside the housing 3. For an oil-cooled motor, naturally, the interior of the housing 3 (the internal space, not just referring to the material inside the housing) contains cooling oil passages and an oil sump 10. The oil sump 10 stores a certain amount of cooling oil. An oil pump 11 and an oil cooler 12 are also connected to the housing 3. The oil pump 11 draws the cooling oil from the oil sump 10. After being cooled by the oil cooler 12, the cooling oil is sent back into the motor's interior, cooling the windings from top to bottom before flowing back into the oil sump 10, completing the cooling cycle. Naturally, the cooling oil passage has a return path 100. To ensure the motor's sealing performance, an oil seal 7 is also provided on the outside of the rotating shaft 8.

[0030] It's easy to understand that when a vehicle travels on different road surfaces, the chassis may tilt vertically (climbing or descending slopes) and horizontally (cornering or over obstacles). In these situations, the oil-cooled motor will also tilt synchronously with the chassis. To prevent the oil pump 11 from running dry under these conditions, the cooling oil in the oil pan 10 should maintain a suitable level of 200 mm (not too low). During vehicle operation, acceleration and deceleration cause the cooling oil in the oil pan 10 to surge, or on bumpy roads, it may splash. If the cooling oil surges or splashes to a certain height and comes into contact with the rotating parts of the motor (including the rotor 2 and other components that rotate synchronously with it), it effectively increases the internal load on the motor, thereby reducing its output efficiency.

[0031] To address the aforementioned issues, unlike conventional oil-cooled motors, this embodiment includes an oil baffle 9 for the oil-cooled motor, such as... Figures 3-5 As shown, the oil baffle 9 is an arc-shaped plate structure with an upward opening. Specifically, the oil baffle 9 is installed radially outside the rotating part of the motor and located in the return oil path 100 of the cooling oil circuit inside the motor. Here, the return oil path 100 includes the meaning of being higher than the liquid level height 200 in the oil sump 10; otherwise, it cannot be called a "path". The oil baffle 9 is also provided with an oil return hole 901, through which the cooling oil falling from the return oil path 100 can land on the oil baffle 9. To ensure that the cooling oil can flow back to the oil sump 10 normally, the oil baffle 9 is also provided with an oil return hole 901 for the cooling oil returning from the cooling oil circuit to flow back to the oil sump 10 normally. Specifically, when fixing the oil baffle 9, it can be fixed to the housing 3 or fixedly connected to other fixed parts inside the housing 3.

[0032] In other words, the basic function of the oil baffle 9 is to cover the outside of the rotating parts of the motor to prevent splashed or surging cooling oil from directly contacting the rotating parts of the motor. This is on the premise that the oil baffle 9 does not affect the normal circulation of the cooling oil.

[0033] When the vehicle is in normal operation, the motor runs normally. The oil pump 11 pumps the cooling oil from the oil pan 10 into the oil cooler 12. After being cooled by the oil cooler 12, the cooling oil enters the oil passage inside the housing 3 and the stator core 4. The cooling oil is sprayed out from both ends of the stator core 4, spraying onto the ends of the windings. Under the action of gravity, it flows back to the oil baffle 9 and then back to the oil pan 10 through the oil return hole 901 of the oil baffle 9 (see reference). Figure 1 The return oil path shown is 100.

[0034] When the vehicle is accelerating, decelerating, or experiencing bumps, the coolant may surge or splash. Under the action of the oil baffle 9, the surged or splashed coolant will be blocked back to the oil pan 10, thereby preventing the coolant from directly contacting the rotating parts of the motor and ensuring that the motor has high efficiency.

[0035] Since the cooling oil is sprayed from both ends of the stator 4 core, the oil baffle 9 is preferably located at both ends of the stator 4 periphery.

[0036] In some preferred embodiments, such as Figures 3-5 As shown, the oil return hole 901 is located at the center of the width direction of the oil baffle plate 9, and the inner side of the oil baffle plate 9 (that is, the upper side or the side facing the rotating part of the motor) is also provided with a guide surface to guide the cooling oil to the oil return hole 901. For example, the guide surface can be an inclined surface, which is formed by the slope of the ramp 902 shown in the figure. That is to say, from the cross-sectional view, the oil baffle plate 9 can be compared to a "V" shaped structure. Of course, the guide surface can also be an arc surface. In short, it is necessary to achieve the purpose of guiding the coolant backflow.

[0037] In some preferred embodiments, such as Figures 3-5 As shown, the oil return hole 901 can be a funnel-shaped hole, which allows the cooling oil to flow back to the oil sump 10 more efficiently. Of course, it should be emphasized that in other embodiments, the oil return hole 901 may have other shapes, such as round holes, polygonal holes, or elongated holes. Furthermore, the specific number of oil return holes 901 is not specifically limited here; it can be 9 as shown in the figure, or 8 or 10, etc.

[0038] In some preferred embodiments, such as Figure 1 , Figures 3-5As shown, one end of the oil baffle 9 is attached to the stator 4 of the motor in the width direction, and the other end is provided with an inwardly protruding baffle 903. The baffle 903 is used to prevent coolant from overflowing from this end. This ensures that the oil baffle can still effectively block coolant when the vehicle is tilted to the left or right.

[0039] In some preferred embodiments, the central angle of the oil baffle 9 can be selected within the range of 110°-130°, for example, it can be 110°, 115°, 120°, 125°, 130°, or other values ​​within this range. Within this range, the oil baffle 9 can provide better shielding for the rotating parts of the motor, while its size will not be too large and occupy too much internal space of the motor.

[0040] Specific implementation of the oil baffle plate for the oil-cooled motor in this utility model: The implementation method of the oil baffle of the oil-cooled motor is the same as the oil baffle described in the above implementation method of the oil-cooled motor, and will not be described in detail here.

[0041] Specific implementation of the vehicle in this utility model: The vehicle includes a drive motor, the structure of which is consistent with the specific implementation of the oil-cooled motor described above, and will not be described again here. From the perspective of the powertrain, the vehicle can be a pure electric vehicle, a range-extended vehicle, or a hybrid vehicle.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An oil-cooled motor, comprising a housing, wherein the housing contains cooling oil passages and an oil sump, characterized in that, An oil baffle is provided on the radially outer side of the rotating part of the motor and on the oil return path of the cooling oil circuit to the oil sump, in order to prevent the cooling oil in the oil sump from splashing onto the rotating part of the motor. The oil baffle is an arc-shaped plate structure with an upward opening, and an oil return hole is provided on the oil baffle for the cooling oil flowing back from the cooling oil circuit to flow back to the oil sump.

2. The oil-cooled motor according to claim 1, characterized in that, The oil return hole is located at the center of the width direction of the oil baffle, and the inner side of the oil baffle is provided with a guide surface for guiding the cooling oil to flow back to the center.

3. The oil-cooled motor according to claim 1 or 2, characterized in that, One end of the oil baffle plate is attached to the stator of the motor in the width direction, and the other end is provided with an inwardly protruding baffle to prevent the cooling oil from overflowing from that end.

4. The oil-cooled motor according to claim 1 or 2, characterized in that, The oil return hole is a funnel-shaped hole.

5. The oil-cooled motor according to claim 1 or 2, characterized in that, The central angle of the oil baffle plate ranges from 110° to 130°.

6. An oil baffle for an oil-cooled motor, characterized in that, The oil baffle is an arc-shaped plate structure, which is used to be arranged on the radially outer side of the rotating part of the oil-cooled motor and on the oil return path of the motor's cooling oil circuit to the oil sump, so as to prevent the cooling oil in the oil sump from splashing onto the rotating part of the motor. The oil baffle is provided with an oil return hole for the cooling oil flowing back from the cooling oil circuit to flow back to the oil sump.

7. The oil baffle plate for an oil-cooled motor according to claim 6, characterized in that, The oil return hole is located at the center of the width direction of the oil baffle, and the inner side of the oil baffle is provided with a guide surface for guiding the cooling oil to flow back to the center.

8. The oil baffle plate for an oil-cooled motor according to claim 6 or 7, characterized in that, One end of the oil baffle is designed to be in contact with the stator of the motor, and the other end has an inwardly protruding baffle to prevent cooling oil from overflowing from that end.

9. The oil baffle plate for an oil-cooled motor according to claim 6 or 7, characterized in that, The oil return hole is a funnel-shaped hole.

10. The oil baffle plate for an oil-cooled motor according to claim 6 or 7, characterized in that, The central angle of the oil baffle plate ranges from 110° to 130°.

11. A vehicle including a drive motor, characterized in that, The drive motor is the oil-cooled motor as described in any one of claims 1-5.

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