Motor shell and motor
By setting oil drain holes on the motor housing, the oil in the oil chamber is directly poured onto the stator, solving the problem of difficult process caused by the use of oil rings by the oil-cooled motor, and achieving efficient oil cooling and cooling oil saving effect.
Patent Information
- Application Number
- CN202421592888.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-05
AI Technical Summary
The use of oil rings in the prior art of oil-cooled motors makes it difficult to manufacture and assembly processes.
A first oil drain hole is provided on the motor housing, and the oil in the oil cavity flows into the storage cavity and is poured onto the stator through the first oil drain hole to achieve oil cooling and avoid the use of an oil ring.
The manufacturing and assembly process is simplified, process difficulty is reduced, oil cooling efficiency is improved, and cooling oil is saved.
Smart Images
Figure CN222827073U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motor cooling, and specifically provides a motor housing and a motor. Background Art
[0002] The temperature rise of the motor is an important factor that limits the operation and life of the motor. However, actively and effectively cooling the main drive motor is a technical difficulty. The existing cooling methods of new energy motors are mainly air cooling, water cooling and oil cooling, depending on the power of the motor. Among them, due to the high dielectric constant and good insulation performance of the cooling oil, the oil-cooled motor has a higher cooling efficiency. It is usually equipped with a high-power, high-current density main drive motor, which can increase the peak torque / power of the main drive motor and improve the acceleration performance of the vehicle.
[0003] When oil-cooling the motor in the prior art, the stator is usually cooled by spraying oil through an oil ring. Since the use of the oil ring requires consideration of issues such as assembly space, clearance and sealing of structural parts, the difficulty of various processes such as manufacturing and assembly increases.
[0004] Accordingly, the art requires a new motor housing and motor to solve the above problems. Utility Model Content
[0005] The utility model aims to solve the above technical problem, that is, to solve the problem of great process difficulty caused by the use of oil rings in oil-cooled motors in the prior art.
[0006] In a first aspect, the utility model provides a motor housing, wherein an oil cavity is provided in the shell wall of the motor housing, and a receiving cavity is formed inside the motor housing, wherein the receiving cavity is used to set a stator, and a first oil pouring hole is provided on the motor housing, wherein the first oil pouring hole is connected to the oil cavity and the receiving cavity respectively.
[0007] When the above technical solution is adopted, by arranging a first oil spraying hole on the motor housing, the oil in the oil cavity in the shell wall of the motor housing can flow into the accommodating cavity through the first oil spraying hole and spray onto the stator, thereby oil-cooling the stator. The oil spraying function is integrated into the motor housing, and there is no need to use an oil ring, which effectively simplifies the manufacturing and assembly processes and reduces the process difficulty.
[0008] In a specific embodiment of the motor housing, both ends of the motor housing are provided with the first oil spraying holes, and the first oil spraying holes are used to guide the oil in the oil cavity to the stator winding of the stator.
[0009] When the above technical solution is adopted, since the stator winding usually extends from the two axial ends of the stator core to the outside of the stator core, the first oil spraying hole is set at the two ends of the motor housing. The first oil spraying hole is close to the stator winding, so that the oil flowing out of the first oil spraying hole can be quickly sprayed onto the stator winding, thereby improving the oil cooling efficiency and saving cooling oil.
[0010] In a specific implementation of the above motor housing, a plurality of the first oil spray holes are provided at both ends of the motor housing.
[0011] When the above technical solution is adopted, the oil cooling efficiency can be effectively improved by spraying oil onto the stator winding through the multiple first oil spray holes.
[0012] In a specific embodiment of the above motor housing, the first oil spray holes provided at the same end of the motor housing are evenly distributed along the circumference of the motor housing.
[0013] When the above technical solution is adopted, the first oil spraying holes are evenly distributed along the circumferential direction so that the cooling oil can be evenly sprayed to various positions of the stator winding in the circumferential direction, further improving the cooling effect.
[0014] In a specific embodiment of the above-mentioned motor housing, a second oil pouring hole is further provided on the motor housing, and the second oil pouring hole is arranged in the axial middle part of the motor housing. The second oil pouring hole is connected with the oil chamber and the accommodating chamber respectively, and the second oil pouring hole is used to guide the oil in the oil chamber to the stator core of the stator.
[0015] When the above technical solution is adopted, since the stator core is usually arranged in the axial middle part of the motor housing, the second oil spraying hole is arranged in the axial middle part of the motor housing, so that the second oil spraying hole is closer to the stator core, and the oil flowing out of the second oil spraying hole can be quickly sprayed onto the stator core, thereby improving the oil cooling efficiency and saving cooling oil.
[0016] In a specific embodiment of the above motor housing, the oil chamber includes a plurality of oil passages interconnected.
[0017] When adopting the above technical solution, through the setting of the oil circuit, it is possible to achieve communication with each first oil spraying hole. Compared with the cavity structure inside the shell wall of the motor housing, it can effectively reduce the oil storage space, avoid filling with excess cooling oil, save costs, and avoid the reduction in motor housing strength caused by the cavity.
[0018] In a specific implementation of the above motor housing, an oil filling hole is further provided on the motor housing, and the oil filling hole is communicated with the oil chamber.
[0019] When the above technical solution is adopted, oil is injected into the oil cavity through the oil injection hole.
[0020] In a specific embodiment of the motor housing, a pipe joint is installed at the oil filling hole, and the pipe joint is connected to the oil filling hole.
[0021] When the above technical solution is adopted, the setting of the pipe joint facilitates the connection of the external oil filling pipeline with the pipe joint to fill oil into the oil cavity.
[0022] In a specific implementation of the above motor housing, a mounting boss is provided on the motor housing, and the pipe joint is mounted on the mounting boss.
[0023] When the above technical solution is adopted, the installation of the pipe joint can be facilitated by the provision of the boss.
[0024] In a second aspect, the utility model also provides a motor, comprising the motor housing, the motor further comprising the stator, the stator being disposed in the accommodating cavity, the stator comprising the stator core and the stator winding wound on the stator core, a portion of the stator winding extending out of the stator core along the axial direction of the stator core.
[0025] Compared with the prior art, the beneficial effect of the motor housing provided by the utility model is that by arranging a first oil pouring hole on the motor housing, the oil in the oil cavity in the shell wall of the motor housing can flow into the accommodating cavity through the first oil pouring hole and pour onto the stator, thereby performing oil cooling on the stator. The oil pouring function is integrated into the motor housing, and there is no need to use an oil ring, which effectively simplifies the manufacturing and assembly process and reduces the process difficulty. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:
[0027] Figure 1 It is a partial structural schematic diagram of the motor of the utility model;
[0028] Figure 2 It is a partial structural schematic diagram of the motor housing of the utility model;
[0029] Figure 3 It is a schematic diagram of the cross-sectional structure of the motor of the utility model.
[0030] Reference numerals:
[0031] 1-motor housing, 2-stator, 11-oil chamber, 12-accommodating chamber, 13-first oil pouring hole, 14-second oil pouring hole, 15-oil filling hole, 21-stator core, 22-stator winding. DETAILED DESCRIPTION
[0032] Some embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not used to limit the scope of protection of the present invention. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.
[0033] It should be noted that, in the description of the present utility model, the terms "center", "upper", "lower", "left", "right", "front", "back", "top", "bottom", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are merely for the convenience of description, and do not indicate or imply that the relevant devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the ordinal numbers "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0034] In addition, it should be noted that in the description of the present invention, 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 or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0035] Based on the problem pointed out in the background technology that the use of oil rings in oil-cooled motors in the prior art leads to great process difficulty, the utility model provides a motor housing and a motor, aiming to provide a first oil spraying hole on the motor housing so that the oil in the oil cavity in the shell wall of the motor housing can flow into the accommodating cavity through the first oil spraying hole and spray onto the stator, thereby oil-cooling the stator. The oil spraying function is integrated into the motor housing, and there is no need to use an oil ring, which effectively simplifies the manufacturing and assembly processes and reduces the process difficulty.
[0036] See below Figures 1 to 3 The motor housing and the motor of the utility model are introduced in detail. Figure 1 The partial structure of the motor of the utility model is shown. Figure 2 The partial structure of the motor housing of the utility model is shown. Figure 3 The cross-sectional structure of the motor of the utility model is shown. Figures 1 to 3As shown, the motor of the utility model includes a motor housing 1 and a stator 2. The motor housing 1 is provided with a receiving cavity 12. The stator 2 is arranged in the receiving cavity 12. The stator 2 includes a stator core 21 and a stator winding 22 wound on the stator core 21. Part of the stator winding 22 extends out of the stator core 21 along the axial direction of the stator core 21. The motor also includes a rotor, which is rotatably arranged in the stator 2. Possibly, a plurality of open slots are arranged in the circumference of the stator core 21, and the open ends of the open slots are arranged on the inner circumference of the stator core 21, and part of the stator winding 22 is wound in the open slots.
[0037] An oil cavity 11 is provided in the shell wall of the motor housing 1, and a first oil pouring hole 13 is provided on the motor housing 1. The first oil pouring hole 13 is connected with the oil cavity 11 and the accommodating cavity 12 respectively. By arranging the first oil pouring hole 13 on the motor housing 1, the oil in the oil cavity 11 in the shell wall of the motor housing 1 can flow into the accommodating cavity 12 through the first oil pouring hole 13 and pour onto the stator 2, so as to cool the stator 2 with oil. The oil pouring function is integrated into the motor housing 1, and there is no need to use an oil ring, which effectively simplifies the manufacturing and assembly processes and reduces the process difficulty.
[0038] Those skilled in the art can understand that, although it is described above that the open end of the open slot is arranged on the inner circumference of the stator core 21, this is not restrictive, and the open end of the open slot can also be arranged on the outer circumference of the stator core 21, or at both ends of the stator core 21. As long as the stator winding 22 can be wound on the stator core 21, those skilled in the art can make adjustments as needed without deviating from the principle of the present invention and falling within the protection scope of the present invention.
[0039] Possibly, the stator 2 is connected to the motor housing 1 , and the stator 2 and the motor housing 1 may be fixed by bolt connection or by welding, which is not specifically limited here.
[0040] Specifically, both ends of the motor housing 1 are provided with a first oil pouring hole 13, and the first oil pouring hole 13 is used to guide the oil in the oil chamber 11 to the stator winding 22 of the stator 2. Since the stator winding 22 extends from both ends of the stator core 21 axially to the outside of the stator core 21, the first oil pouring hole 13 is arranged at the two ends of the motor housing 1. The first oil pouring hole 13 is close to the stator winding 22, so that the oil flowing out of the first oil pouring hole 13 can be quickly poured onto the stator winding 22, thereby improving the oil cooling efficiency and saving cooling oil. Regarding the number of the first oil spraying holes 13, optionally, multiple first oil spraying holes 13 are provided at both ends of the motor housing 1, and the first oil spraying holes 13 provided at the same end of the motor housing 1 are evenly distributed along the circumference of the motor housing 1. Oil is sprayed onto the stator winding 22 through multiple first oil spraying holes 13, which can effectively improve the oil cooling efficiency. The first oil spraying holes 13 are evenly distributed along the circumference, which can evenly spray the cooling oil to various positions of the stator winding 22 around the circumference, further improving the cooling effect.
[0041] It should be noted that the motor housing 1 may include only side walls, and the side wall covers are arranged on the circumference of the stator 2, or it may include both side walls and end walls, and the end walls are connected to the side walls, and the end walls are arranged at both ends of the stator 2. When the motor housing 1 includes only side walls, the first oil pouring hole 13 is arranged at both ends of the side wall of the motor housing 1. When the motor housing 1 includes both side walls and end walls, the first oil pouring hole 13 may be arranged at both ends of the side wall of the motor housing 1, or may be arranged on the two end walls of the motor housing 1.
[0042] The motor housing 1 is also provided with a second oil pouring hole 14, which is arranged in the axial middle of the motor housing 1. The second oil pouring hole 14 is connected to the oil cavity 11 and the accommodating cavity 12 respectively. The second oil pouring hole 14 is used to guide the oil in the oil cavity 11 to the stator core 21 of the stator 2. Since the stator core 21 is usually arranged in the axial middle of the motor housing 1, the second oil pouring hole 14 is arranged in the axial middle of the motor housing 1, so that the second oil pouring hole 14 is close to the stator core 21, and the oil flowing out of the second oil pouring hole 14 can be quickly poured onto the stator core 21, thereby improving the oil cooling efficiency and saving cooling oil. Regarding the number of the second oil pouring holes 14, there can be multiple or only one. When there are multiple second oil pouring holes 14, the second oil pouring holes 14 are evenly distributed along the circumference of the motor housing 1, so that the cooling oil can be evenly poured to various positions of the stator core 21 in the circumference, further improving the cooling effect.
[0043] It should be noted that although the above combination Figure 1-3It is described that the first oil pouring hole 13 is arranged at the two ends of the motor housing 1, and the second oil pouring hole 14 is arranged at the axial middle part of the motor housing 1, but this is not restrictive. The first oil pouring hole 13 can also be arranged at the axial middle part of the motor housing 1. Correspondingly, the second oil pouring hole 14 is arranged at the two ends of the motor housing 1, and the first oil pouring hole 13 can also be provided with multiple ones, some of which are arranged at the two ends of the motor housing 1, and some are arranged at the axial middle part of the motor housing 1. As long as the oil in the oil chamber 11 can be guided to the stator winding 22 and the stator core 21, they do not deviate from the principle of the utility model and belong to the protection scope of the utility model. Those skilled in the art can make adjustments as needed.
[0044] Furthermore, the motor housing 1 is provided with an oil filling hole 15, which is in communication with the oil cavity 11, and oil is filled into the oil cavity 11 through the oil filling hole 15. A pipe joint is installed at the oil filling hole 15, which is in communication with the oil filling hole 15, and the pipe joint can be an elbow joint or a straight joint. The setting of the pipe joint facilitates the connection of an external oil filling pipeline with the pipe joint, and oil is filled into the oil cavity 11 through the external oil filling pipeline.
[0045] Optionally, a mounting boss is provided on the motor housing 1, and the pipe joint is installed on the mounting boss. The setting of the boss can facilitate the installation of the pipe joint; possibly, a threaded hole is provided on the boss, the threaded hole is connected to the oil filling hole 15, and the pipe joint is installed in the threaded hole.
[0046] It should be noted that the oil injection hole 15 can be provided on the inner wall of the motor housing 1 or on the outer wall of the motor housing 1, and those skilled in the art can adjust it according to the layout of the motor and the oil injection demand. In addition, the position of the oil injection hole 15 can be provided between the first oil injection holes 13 at both ends of the motor housing 1, which can effectively reduce the space of the oil chamber 11, thereby reducing the injection of excess cooling oil and saving costs. Furthermore, when injecting oil into the oil chamber 11 through the oil injection hole 15, an oil injection machine can be used for oil injection, and the oil injection pressure can be adjusted by the oil injection machine to adjust the oil outlet pressure of the first oil injection hole 13 and / or the second oil injection hole 14.
[0047] Optionally, the oil chamber 11 includes a plurality of oil passages that are interconnected, each of which is connected to the first oil spray hole 13, the second oil spray hole 14, and the oil filling hole 15. By setting the oil passages, compared with the cavity structure inside the shell wall of the motor housing 1, the oil storage space can be effectively reduced, and the filling of excess cooling oil can be avoided, which saves costs and avoids the reduction of the strength of the motor housing 1 caused by the cavity. In addition, the oil chamber 11 can also be an annular cavity, and is provided in the shell wall at both ends of the motor housing, or in the middle part and the shell wall at both ends of the motor housing. Those skilled in the art can make adjustments as needed.
[0048] It should be noted that the above-mentioned implementation modes are only used to illustrate the principles of the present invention and are not intended to limit the protection scope of the present invention. Without departing from the principles of the present invention, those skilled in the art can adjust the above-mentioned implementation modes so that the present invention can be applied to more specific application scenarios.
[0049] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims
1. A motor housing, characterized in that: An oil cavity is arranged in the shell wall of the motor housing, and a receiving cavity is formed inside the motor housing. The receiving cavity is used to set the stator. A first oil spraying hole is arranged on the motor housing, and the first oil spraying hole is communicated with the oil cavity and the receiving cavity respectively.
2. The motor housing according to claim 1, characterized in that: The first oil spraying holes are provided at both ends of the motor housing, and the first oil spraying holes are used to guide the oil in the oil cavity to the stator winding of the stator.
3. The motor housing according to claim 2, characterized in that: A plurality of the first oil spray holes are provided at both ends of the motor housing.
4. The motor housing according to claim 3, characterized in that: The first oil spray holes arranged at the same end of the motor housing are evenly distributed along the circumference of the motor housing.
5. The motor housing according to claim 2, characterized in that: The motor housing is also provided with a second oil pouring hole, which is arranged in the axial middle part of the motor housing, and is connected with the oil cavity and the accommodating cavity respectively, and is used to guide the oil in the oil cavity to the stator core of the stator.
6. The motor housing according to claim 3, characterized in that: The oil chamber includes a plurality of oil passages that are interconnected.
7. The motor housing according to claim 1, characterized in that: The motor housing is also provided with an oil filling hole, which is communicated with the oil cavity.
8. The motor housing according to claim 7, characterized in that: A pipe joint is installed at the oil filling hole, and the pipe joint is communicated with the oil filling hole.
9. The motor housing according to claim 8, characterized in that: The motor housing is provided with a mounting boss, and the pipe joint is mounted on the mounting boss.
10. A motor, characterized in that: The motor includes a motor housing as described in any one of claims 1 to 9, and the motor also includes the stator, which is arranged in the accommodating cavity. The stator includes the stator core and the stator winding wound on the stator core, and a part of the stator winding extends out of the stator core along the axial direction of the stator core.