Motor end cover, motor and automobile

Abstract

The utility model relates to a motor end cover, a motor and an automobile, and relates to the technical field of automobiles, the motor end cover is used for covering a winding, the motor end cover is provided with a first through hole for connecting a bearing, and the motor end cover is provided with a copper bar area for installing a copper bar; the motor end cover is provided with a first annular channel, a connecting channel and a second annular channel, the first annular channel is used for being communicated with an external cooling medium, spraying holes penetrate through the inner wall of the first annular channel, and the spraying holes face the winding; the first annular channel is further provided with a cooling hole communicated with the copper bar area. One end of the connecting channel communicates with the first annular channel; the second annular channel is arranged around the first through hole and communicates with the first annular channel through the other end of the connecting channel. Through the arrangement of the first annular channel, the connecting channel and the second annular channel, the winding, the copper bar and the bearing can be cooled at the same time, the cooling capacity is improved, and the working efficiency of the motor is improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobiles, and particularly to a motor end cover, a motor and an automobile. Background Art

[0002] In the field of new energy vehicles, the motor end cover, as an important structural component in the electric drive assembly, plays important roles such as sealing, supporting, and bearing. In the field of oil-cooled motors, the scheme of cooling the heat-generating components of the motor with cooling oil is widely used. However, at present, the cooling schemes of oil-cooled motors rarely take into account the cooling of bearings, windings, and copper bars, and the imperfect cooling scheme will lead to insufficient cooling capacity of existing oil-cooled motors, affecting the working efficiency of the motors. Summary of the Utility Model

[0003] Based on this, there is provided a motor end cover, a motor and an automobile, which can simultaneously take into account the cooling of bearings, windings, and copper bars, improve the cooling capacity of the oil-cooled motor, and improve the working efficiency of the motor.

[0004] To this end, in a first aspect, an embodiment of the present application provides a motor end cover. The motor end cover is used to cover a winding. The motor end cover is provided with a first through hole for connecting a bearing, and a copper bar area for installing a copper bar; the motor end cover is provided with: a first annular channel for communicating with an external cooling medium, and the inner wall of the first annular channel is penetrated with spraying holes facing the winding; the first annular channel is further provided with cooling holes communicating with the copper bar area; a connecting channel, one end of which communicates with the first annular channel; and a second annular channel surrounding the first through hole and communicating with the first annular channel through the other end of the connecting channel.

[0005] In one embodiment, a plurality of the spraying holes are provided and are spaced at intervals around the circumferential side of the first annular channel; and / or, a plurality of the cooling holes are provided and are spaced apart.

[0006] In one embodiment, the connecting channel is further provided with a second through hole communicating with the outside, and further includes a plug adapted to the second through hole, and the plug is used to block the second through hole.

[0007] In one embodiment, the plug includes a main body portion and a guiding portion connected to each other, and the diameter of the guiding portion is smaller than the diameter of the main body portion.

[0008] In one embodiment, a groove is formed by concave inward at one end of the main body portion facing away from the guiding portion.

[0009] In one embodiment, the motor end cover is further provided with a sealing ring groove for installing a sealing ring. The sealing ring groove is coaxially arranged with the first annular channel and is located on the inner wall of the first annular channel.

[0010] In a second aspect, an embodiment of the present application provides a motor, including a housing and the motor end cover described in any one of the above. The housing is connected to the motor end cover.

[0011] In one embodiment, the housing is provided with an external connection channel communicating with the outside, and the external connection channel is used to communicate with the first annular channel of the motor end cover.

[0012] In one embodiment, the housing is provided with a first stepped portion, and the motor end cover is provided with a second stepped portion. The first stepped portion is engaged with the second stepped portion.

[0013] In a third aspect, an embodiment of the present application provides a motor, including a housing and the motor end cover described in any one of the above. The housing is connected to the motor end cover.

[0014] According to the motor end cover, motor and vehicle provided by the embodiments of the present application, the motor end cover is used to cover the winding. The motor end cover is provided with a first through hole for connecting a bearing, and a copper busbar area for installing a copper busbar; the motor end cover is provided with a first annular channel, a connection channel and a second annular channel. The first annular channel is used to communicate with an external cooling medium. The inner wall of the first annular channel is penetrated with spray holes, and the spray holes face the winding; the first annular channel is also provided with cooling holes communicating with the copper busbar area; one end of the connection channel communicates with the first annular channel; the second annular channel surrounds the first through hole and communicates with the first annular channel through the other end of the connection channel. The cooling medium enters the first annular channel, and sprays and cools the winding through the spray holes, cools and lubricates the copper busbar through the cooling holes. The cooling medium also enters the second annular channel through the connection channel, so as to lubricate and cool the bearing. Through the arrangement of the first annular channel, the connection channel and the second annular channel, the present application can cool the winding, the copper busbar and the bearing at the same time, improve the cooling capacity and the working efficiency of the motor. Description of the Drawings

[0015] Figure 1 Showing a bottom view of a motor provided by an embodiment of the present application;

[0016] Figure 2 Showing a cross-sectional view of a motor provided by an embodiment of the present application;

[0017] Figure 3 Showing a structural schematic diagram of a motor end cover provided by an embodiment of the present application;

[0018] Figure 4 Shows an exploded view of a motor end cover and a sealing ring provided by an embodiment of the present application;

[0019] Figure 5 Shows a schematic structural diagram of a plugging block provided by an embodiment of the present application.

[0020] Explanation of reference numerals:

[0021] 1. Motor end cover; 11. First through hole; 12. Copper row area; 13. First annular channel; 131. Spray hole; 132. Cooling hole; 14. Connection channel; 141. Second through hole; 15. Second annular channel; 16. Sealing ring groove; 17. Second step portion; 2. Winding; 3. Bearing; 4. Copper row; 5. Plugging block; 51. Main body portion; 511. Groove; 52. Guide portion; 6. Sealing ring; 7. Stator core; 8. Housing; 81. External connection channel; 82. First step portion. Detailed implementation manners

[0022] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0023] It should be noted that the illustrations provided in this embodiment only schematically illustrate the basic concept of the present invention. Therefore, only the components related to the present invention are shown in the drawings, rather than being drawn according to the number, shape and size of the components in actual implementation. The type, quantity and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0024] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the objectives that can be achieved, should still fall within the scope that can be covered by the technical content disclosed by the present invention.

[0025] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "middle", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc. cited in this specification is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplified description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0026] In the field of oil-cooled motors, the solution of cooling the heat-generating components of the motor with cooling oil is widely used. However, at present, the cooling solutions of oil-cooled motors rarely take into account the cooling of bearings, windings and busbars, and the imperfect cooling solution will lead to insufficient cooling capacity of existing oil-cooled motors, affecting the working efficiency of the motors.

[0027] To solve the above problems, refer to Figures 1-3 , Figure 1 showing a bottom view of a motor provided by an embodiment of the present application, Figure 2 showing a cross-sectional view of a motor provided by an embodiment of the present application, Figure 3 showing a schematic structural view of a motor end cover provided by an embodiment of the present application.

[0028] The present application provides a motor end cover 1. The motor end cover 1 is used to cover the winding 2. The motor end cover 1 is provided with a first through hole 11 for connecting the bearing 3, and the motor end cover 1 is provided with a busbar area 12 for installing the busbar 4; the motor end cover 1 is provided with a first annular channel 13, a connecting channel 14 and a second annular channel 15. The first annular channel 13 is used to communicate with the external cooling medium. The inner wall of the first annular channel 13 is penetrated with spray holes 131, and the spray holes 131 face the winding 2; the first annular channel 13 is also provided with cooling holes 132 communicating with the busbar area 12; one end of the connecting channel 14 communicates with the first annular channel 13; the second annular channel 15 is arranged around the first through hole 11 and communicates with the first annular channel 13 through the other end of the connecting channel 14.

[0029] It should be understood that the motor end cover 1 is connected to the housing 8, the winding 2 is located inside the housing 8, the motor end cover 1 covers the winding 2, and a first through hole 11 is also provided at the motor end cover 1. The first through hole 11 is located in the middle of the motor end cover 1 and is coaxially arranged with the motor end cover 1. When the motor is assembled, the bearing 3 extends into the first through hole 11. The motor end cover 1 is also provided with a busbar area 12, and the busbar 4 is installed in the busbar area 12.

[0030] The motor end cover 1 is also provided with a first annular channel 13. The first annular channel 13 is arranged in a ring shape and surrounds the winding 2. The first annular channel 13 is coaxially arranged with the winding 2 and is communicated with an external cooling medium. The cooling medium is cooling oil or other cooling media, which is not limited in this application. The inner wall of the first annular channel 13 is provided with spray holes 131. The spray holes 131 penetrate through the first annular channel 13 and face the winding 2, that is, the spray holes 131 can convey the cooling medium in the first annular channel 13 to the winding 2, so as to spray-cool and lubricate the winding 2.

[0031] Among them, the first annular channel 13 is also provided with cooling holes 132. The cooling holes 132 are communicated with the copper busbar area 12, that is, the cooling holes 132 can convey the cooling medium in the first annular channel 13 to the copper busbar area 12, so as to cool and lubricate the copper busbar 4.

[0032] The motor end cover 1 is provided with a connection channel 14 and a second annular channel 15. One end of the connection channel 14 is communicated with the first annular channel 13, that is, the cooling medium in the first annular channel 13 can exchange and flow with the cooling medium in the connection channel 14. The second annular channel 15 is communicated with the other end of the connection channel 14, that is, the cooling medium in the second annular channel 15 can exchange and flow with the cooling medium in the connection channel 14. That is, the cooling media in the first annular channel 13, the connection channel 14 and the second annular channel 15 exchange and flow with each other.

[0033] The second annular channel 15 is arranged at the first through hole 11 and is coaxially arranged with the first through hole 11, that is, the cooling medium in the second annular channel 15 can cool and lubricate the bearing 3 located at the first through hole 11. Compared with the existing situation that the rear bearing on the motor end cover 1 is far from the main oil passage, the problem of bearing failure caused by poor lubrication due to active lubrication is reduced, and thus the NVH (noise, vibration and harshness) and service life of the electric drive assembly are improved.

[0034] During operation, the cooling medium enters the first annular channel 13, and sprays and cools the winding 2 through the spray holes 131, cools and lubricates the copper busbar 4 through the cooling holes 132. The cooling medium also enters the second annular channel 15 through the connection channel 14, so as to lubricate and cool the bearing 3. Through the settings of the first annular channel 13, the connection channel 14 and the second annular channel 15 in this application, the winding 2, the copper busbar 4 and the bearing 3 can be cooled simultaneously, the cooling capacity is improved, and the working efficiency of the motor is improved.

[0035] Meanwhile, through the provision of the first annular channel 13 and the spray holes 131, the present application does not require an additional fuel injection ring, thus avoiding the situation of the sealing ring being turned up during the installation of the fuel injection ring and the misalignment caused by blind installation, reducing the occurrence of seal failure, and greatly reducing the repair cost. Moreover, since the fuel injection ring, as a single component, requires separate mold control, the present application also saves the mold opening cost and storage cost, and reduces the assembly time and cost.

[0036] In some alternative embodiments, a plurality of spray holes 131 are provided and are spaced apart around the circumferential side of the first annular channel 13. The provision of the plurality of spray holes 131 can improve the spraying effect on the winding 2, thereby improving the cooling capacity of the present application for the motor and enhancing the working effect of the motor. The present application does not limit the aperture of the spray holes 131. In one example, the aperture of one of the adjacent two spray holes 131 is larger than that of the other spray hole 131, so that the injection distances of the cooling medium sprayed by the adjacent two spray holes 131 are different, thereby improving the cooling effect on the winding 2.

[0037] In some alternative embodiments, a plurality of cooling holes 132 are provided and are spaced apart. In one example, three cooling holes 132 are provided and are located at a position of the first annular channel 13 close to the copper busbar area 12, and the three cooling holes 132 are spaced apart. The provision of the plurality of cooling holes 132 can improve the cooling effect on the copper busbar 4, thereby improving the cooling capacity of the present application for the motor and enhancing the working effect of the motor.

[0038] Refer to Figures 3-5 , Figure 4 which shows an exploded view of a motor end cover and a sealing ring provided by an embodiment of the present application, Figure 5 which shows a schematic structural view of a plug provided by an embodiment of the present application.

[0039] In some alternative embodiments, the connecting channel 14 is further provided with a second through hole 141 communicating with the outside, and further includes a plug 5 adapted to the second through hole 141, and the plug 5 is used to block the second through hole 141. When preparing the connecting channel 14, it is necessary to first open the second through hole 141 to facilitate the manufacture of the connecting channel 14 at the motor end cover 1. After the connecting channel 14 is manufactured, the second through hole 141 is then closed by the plug 5 to form a closed connecting channel 14.

[0040] Meanwhile, the operator can introduce a cooling medium through the second through hole 141 to improve the cooling effect on the motor. When cooling is not required, the second through hole 141 is then closed by the plug 5 to prevent foreign objects from entering the connecting channel 14.

[0041] Among them, the material of the plug 5 is not limited. The plug 5 can be made of elastic materials such as rubber and silica gel, so as to improve the sealing effect on the connection channel 14.

[0042] Referring to Figure 5 , in some alternative embodiments, the plug 5 includes a main body portion 51 and a guiding portion 52 connected to each other. The diameter of the guiding portion 52 is smaller than that of the main body portion 51. The main body portion 51 and the guiding portion 52 are coaxially arranged, and the guiding portion 52 is located at the end of the main body portion 51. The material of the main body portion 51 is the same as that of the guiding portion 52, and the guiding portion 52 and the main body portion 51 are integrally formed. The diameter of the guiding portion 52 is smaller than that of the main body portion 51, which facilitates the insertion of the guiding portion 52 into the second through hole 141, thereby improving the convenience of connecting the plug 5 to the connection channel 14.

[0043] In one example, the guiding portion 52 is conical.

[0044] In one example, the guiding portion 52 is frustum-shaped, and the end of the guiding portion 52 is chamfered.

[0045] In some alternative embodiments, a groove 511 is formed by concave inward at one end of the main body portion 51 away from the guiding portion 52. The groove 511 provided on the main body portion 51 facilitates the operator to install the plug 5 into the second through hole 141, and also facilitates the removal of the plug 5 from the second through hole 141.

[0046] In some alternative embodiments, the motor end cover 1 is further provided with a sealing ring groove 16 for installing a sealing ring 6. The sealing ring groove 16 is coaxially arranged with the first annular channel 13 and is located on the inner wall of the first annular channel 13. When the motor is assembled, the motor end cover 1 abuts against the stator core 7. The provision of the sealing ring 6 can improve the sealing effect between the motor end cover 1 and the stator core 7. The sealing ring groove 16 is located on the inner wall of the first annular channel 13, avoiding the sealing ring 6 being located at the housing 8 and avoiding affecting the connection effect between the first motor end cover 1 and the housing 8.

[0047] Referring to Figures 1-5, this application further includes a motor, the motor includes a housing 8 and the motor end cover 1 described in any one of the above, and the motor end cover 1 is connected to the housing 8. The motor end cover 1 is used to cover the winding 2. The motor end cover 1 is provided with a first through hole 11 for connecting the bearing 3, and the motor end cover 1 is provided with a bus bar area 12 for installing the bus bar 4; the motor end cover 1 is provided with a first annular channel 13, a connection channel 14 and a second annular channel 15. The first annular channel 13 is used to communicate with the external cooling medium. The inner wall of the first annular channel 13 is penetrated with spray holes 131, and the spray holes 131 face the winding 2; the first annular channel 13 is also provided with cooling holes 132 communicating with the bus bar area 12; one end of the connection channel 14 communicates with the first annular channel 13; the second annular channel 15 is arranged around the first through hole 11 and communicates with the first annular channel 13 through the other end of the connection channel 14.

[0048] During operation, the cooling medium enters the first annular channel 13, and sprays and cools the winding 2 through the spray holes 131, cools and lubricates the bus bar 4 through the cooling holes 132. The cooling medium also enters the second annular channel 15 through the connection channel 14, so as to lubricate and cool the bearing 3. Through the arrangement of the first annular channel 13, the connection channel 14 and the second annular channel 15, this application can cool the winding 2, the bus bar 4 and the bearing 3 at the same time, improving the cooling capacity and the working efficiency of the motor.

[0049] In some alternative embodiments, the housing 8 is provided with an external connection channel 81 communicating with the outside. The external connection channel 81 is used to communicate with the first annular channel 13 of the motor end cover 1. The external connection channel 81 can communicate with the external cooling medium, so as to introduce the cooling medium to the housing 8, thereby cooling the housing 8, and then introducing the cooling medium into the first annular channel 13 through the external connection channel 81, and further introducing it into the second annular channel 15 to cool the winding 2, the bus bar 4 and the bearing 3. In order to prevent foreign objects from entering the external connection channel 81, a filter element can be provided at the entrance of the external connection channel 81.

[0050] In some alternative embodiments, the housing 8 is provided with a first stepped portion 82, and the motor end cover 1 is provided with a second stepped portion 17. The first stepped portion 82 is engaged with the second stepped portion 17. The first stepped portion 82 has an opening facing upward, and the second stepped portion 17 has an opening facing downward. When the first stepped portion 82 is engaged with the second stepped portion 17, the connection tightness between the motor end cover 1 and the housing 8 is improved, and the probability of the cooling medium leaking from the connection between the motor end cover 1 and the housing 8 is avoided.

[0051] Refer to Figures 1-5 , this application further includes an automobile, and the automobile includes the motor described in any one of the above.

[0052] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0053] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A motor end cover (1), characterized in that: The motor end cover (1) is used to cover the winding (2), the motor end cover (1) is provided with a first through hole (11) for connecting the bearing (3), and the motor end cover (1) is provided with a copper bar area (12) for installing the copper bar (4); the motor end cover (1) is provided with: A first annular channel (13) is used for communicating with an external cooling medium, a spray hole (131) is penetrated through the inner wall of the first annular channel (13), and the spray hole (131) faces the winding (2); the first annular channel (13) is also provided with a cooling hole (132) communicating with the copper bar area (12); A connecting channel (14), one end of which is in communication with the first annular channel (13); as well as The second annular channel (15) is arranged around the first through hole (11) and is connected to the first annular channel (13) through the other end of the connecting channel (14).

2. The motor end cover (1) according to claim 1, characterized in that: The spray holes (131) are provided in plurality and are arranged at intervals around the circumference of the first annular channel (13); and / or the cooling holes (132) are provided in plurality and are arranged at intervals.

3. The motor end cover (1) according to claim 1, characterized in that: The connecting channel (14) is also provided with a second through hole (141) communicating with the outside, and also includes a sealing plug (5) adapted to the second through hole (141), wherein the sealing plug (5) is used to seal the second through hole (141).

4. The motor end cover (1) according to claim 3, characterized in that: The sealing plug (5) comprises a main body portion (51) and a guide portion (52) which are connected to each other, and the diameter of the guide portion (52) is smaller than the diameter of the main body portion (51).

5. The motor end cover (1) according to claim 4, characterized in that: One end of the main body portion (51) away from the guide portion (52) is inwardly concave to form a groove (511).

6. The motor end cover (1) according to claim 1, characterized in that: The motor end cover (1) is also provided with a sealing ring groove (16), the sealing ring groove (16) is used to install a sealing ring (6), the sealing ring groove (16) is coaxially arranged with the first annular channel (13), and the sealing ring groove (16) is located on the inner wall of the first annular channel (13).

7. A motor, characterized in that: It comprises a shell (8) and a motor end cover (1) according to any one of claims 1 to 6, wherein the shell (8) is connected to the motor end cover (1).

8. The motor according to claim 7, characterized in that The housing (8) is provided with an external channel (81) communicating with the outside, and the external channel (81) is used to communicate with the first annular channel (13) of the motor end cover (1).

9. The motor according to claim 7, characterized in that The housing (8) is provided with a first step portion (82), and the motor end cover (1) is provided with a second step portion (17), and the first step portion (82) is engaged with the second step portion (17).

10. An automobile, characterized in that: Comprising a motor as described in any one of claims 7-9.

Images