A driving motor and an automobile

Abstract

The present invention provides a drive motor and an automobile. The drive motor includes: a housing, including a motor housing and a front end cover and a rear end cover provided at both ends of the motor housing. A hollowed-out portion is provided on the motor housing. An oil inlet hole for cooling oil to flow into the hollowed-out portion and a motor housing oil outlet hole for flowing out of the hollowed-out portion and entering the interior of the housing are provided on the motor housing; a stator is coaxially arranged with the housing, and at least one stator radial hole is provided on the stator. The cooling oil flowing out through the motor housing oil outlet hole flows into the stator through the stator radial hole. By directly providing a hollowed-out portion on the housing, the cooling oil flowing into the hollowed-out portion is directly stored inside the housing. Since the outer walls of the hollowed-out portion are all part of the housing, setting the hollowed-out portion will not significantly affect the overall strength of the housing.

Description

Technical Field

[0001] The present invention relates to the technical field of drive motors, and particularly to a drive motor used in an automobile. Background Art

[0002] In recent years, with the strong advocacy of national policies, the new energy vehicle field has developed rapidly. As a core component of new energy vehicles, the drive motor of new energy vehicles undertakes the driving function of new energy vehicles.

[0003] For a drive motor, a large amount of heat is generated during the high-speed rotation of the drive motor. The heat is mainly concentrated in parts such as the housing, stator, rotor, and rotor bearings. If the heat is not timely conducted out of the drive motor, it will have an adverse impact on the working stability of the drive motor. In the prior art, the drive motor is usually cooled by an oil cooling method. Summary of the Invention

[0004] Therefore, the present invention provides a drive motor with better heat dissipation effect.

[0005] For this purpose, the present invention provides a drive motor, including: a housing, including a casing and a front end cover and a rear end cover provided at both ends of the casing, a hollowed-out portion is provided on the casing, an oil inlet hole for cooling oil to flow into the hollowed-out portion is provided on the casing, and a casing oil outlet hole for flowing out of the hollowed-out portion and entering the inside of the casing; a stator, coaxially arranged with the housing, at least one stator radial hole is provided on the stator, and the cooling oil flowing out through the casing oil outlet hole flows into the stator through the stator radial hole.

[0006] The stator includes a plurality of stator first iron cores arranged side by side with each other. A stator second iron core is provided at a position where two adjacent stator first iron cores correspond to the casing oil outlet hole, and the stator radial hole is provided on the stator second iron core.

[0007] The stator radial holes of a plurality of the second iron cores are arranged in a spiral shape.

[0008] Along the extension direction of the spiral line of the drive motor, the stator radial holes of the second iron core at the starting end and the stator radial holes of the second iron core at the ending end are on the same straight line.

[0009] The drive motor further includes a rotating shaft, a rotor is sleeved on the rotating shaft, a front accommodating cavity is provided on the front end cover, a front bearing is provided in the front accommodating cavity, a rear accommodating cavity is provided on the rear end cover, a rear bearing is provided in the rear accommodating cavity, and the rotating shaft rotates through the front bearing and the rear bearing; a lateral flow channel is provided in a region between the hollowed-out portion and the front bearing on the casing and the front end cover, and a region between the hollowed-out portion and the rear bearing on the casing and the rear end cover.

[0010] The lateral flow channel includes: a front end cover built-in flow channel provided between the hollowed-out portion and the front bearing; and a rear end cover built-in flow channel provided between the hollowed-out portion and the rear bearing.

[0011] A front end cover steel sleeve is provided in the front accommodation cavity, the front bearing is arranged inside the front end cover steel sleeve, the front end cover steel sleeve is provided with a front bearing flow channel, the front bearing flow channel is arranged opposite to the rotor of the front bearing, and the front bearing flow channel is communicated with the front end cover built-in flow channel.

[0012] A rear end cover steel sleeve is provided in the rear accommodation cavity, the rear bearing is arranged inside the rear end cover steel sleeve, the rear end cover steel sleeve is provided with a rear bearing flow channel, the rear bearing flow channel is arranged opposite to the rotor of the rear bearing, and the rear bearing flow channel is communicated with the rear end cover built-in flow channel.

[0013] An oil seal is provided on the front end cover and / or the rear end cover, and the rear bearing flow channel and / or the front bearing flow channel are located between the rear bearing and / or the front bearing and the oil seal.

[0014] The front end cover and / or the rear end cover are provided with end cover nozzles communicated with the front end cover built-in flow channel and / or the rear end cover built-in flow channel, and the cooling oil flowing out through the end cover nozzles is sprayed onto the rotor.

[0015] A plurality of the end cover nozzles are arranged in a ring shape, and a drainage channel is connected between a plurality of the rear end cover spray holes.

[0016] The rotor is provided with weight-reducing holes extending along the axial direction of the rotor, and the cooling oil flowing out through the end cover nozzles flows into the weight-reducing holes.

[0017] The stator is provided with a winding wire package, and an oil injection hole is formed in the hollowed-out portion and arranged towards the winding wire package.

[0018] A nozzle is detachably arranged on the oil injection hole, and the nozzle is provided with an oil guide hole communicated with the oil injection hole.

[0019] A one-word groove is arranged on the surface of the nozzle close to the stator, and the one-word groove is communicated with the oil guide hole.

[0020] The present invention also provides an automobile, including the drive motor provided by the present invention.

[0021] The technical solution of the present invention has the following advantages:

[0022] 1. The drive motor provided by the present invention includes: a housing, including a casing and a front end cover and a rear end cover provided at both ends of the casing, a hollowed-out portion is provided on the casing, an oil inlet hole for cooling oil to flow into the hollowed-out portion is provided on the casing, and a casing oil outlet hole for flowing out of the hollowed-out portion and entering the inside of the casing; a stator, coaxially arranged with the housing, at least one stator radial hole is provided on the stator, and the cooling oil flowing out through the casing oil outlet hole flows into the stator through the stator radial hole.

[0023] In the prior art, a hollowed-out portion is often directly provided on the inner wall of the housing. However, during the testing process, technicians found that: due to the existence of the hollowed-out portion, a part of the inner wall of the housing will be sunken. At this time, an oil passage is formed after the outer edge of the stator is assembled with the inner wall of the housing. However, since the area of the interference fit between the inner wall of the housing and the stator is reduced, the bonding strength between the stator and the casing is significantly decreased, and there is a risk of loosening during high-temperature operation of the motor.

[0024] In this application, a hollowed-out portion is directly provided on the housing, and the cooling oil flowing into the hollowed-out portion is directly stored inside the housing. Since the outer walls of the hollowed-out portion are all part of the housing, setting the hollowed-out portion will not significantly affect the overall strength of the housing. At the same time, in this application, since the hollowed-out portion is provided inside the housing, the positional relationship between the stator core and the housing will not change at all, thereby avoiding the risk of loosening between the stator core and the casing.

[0025] 2. The drive motor provided by the present invention, the stator includes a plurality of stator first cores arranged side by side with each other, a stator second core is provided at a position corresponding to the casing oil outlet hole between two adjacent stator first cores, and the stator radial hole is provided on the stator second core.

[0026] In this application, through the cooperation between the stator radial hole and the casing oil outlet hole, the cooling oil contained inside the hollowed-out portion stably flows into the stator through the stator second core, thereby playing a role in lubricating the stator.

[0027] At the same time, the cooling oil passing through the stator will further flow to the rotor located at the inner edge position of the stator. When the rotor rotates at a high speed, the middle position of the rotor can be lubricated.

[0028] 3. The drive motor provided by the present invention, the stator radial holes of several of the second cores are arranged in a spiral shape.

[0029] Since the stator holes of multiple second cores are arranged in a spiral shape, the area where the cooling oil enters the stator and the rotor can be increased. When the rotor rotates, the area of the rotor receiving the cooling oil is increased, thereby greatly enhancing the cooling capacity of the stator and the rotor.

[0030] 4. For the drive motor provided by the present invention, along the extending direction of the spiral line, the stator radial holes of the second iron core at the starting end and the stator radial holes of the second iron core at the ending end are on the same straight line.

[0031] Since the stator radial holes at the starting end and the stator radial holes at the ending end are on the same straight line, the stator can receive cooling oil in the entire circumferential direction. The cooling oil further flows to the rotor. When the rotor rotates, the entire rotor is lubricated, thus greatly enhancing the cooling capacity for the stator and the rotor.

[0032] 5. For the drive motor provided by the present invention, a rotor is sleeved on the rotating shaft. A front accommodation cavity is provided on the front end cover, and a front bearing is provided in the front accommodation cavity. A rear accommodation cavity is provided on the rear end cover, and a rear bearing is provided in the rear accommodation cavity. The rotating shaft rotates through the front bearing and the rear bearing; a lateral flow channel is provided in the area between the hollowed-out part and the front bearing on the machine shell and the front end cover and / or in the area between the hollowed-out part and the rear bearing on the machine shell and the rear end cover.

[0033] By providing the lateral flow channel, the cooling oil in the hollowed-out part can flow into the positions of the front bearing and the rear bearing through the lateral flow channel. By providing the lateral flow channel, the cooling oil can take away the heat generated by the bearings during high-speed rotation, thereby realizing the cooling of the front bearing and the rear bearing, and at the same time, realizing the lubrication of the front bearing and the rear bearing.

[0034] 6. For the drive motor provided by the present invention, a front end cover steel sleeve is provided in the front accommodation cavity. The front bearing is arranged inside the front end cover steel sleeve. The front end cover steel sleeve is provided with a front bearing flow channel, and the front bearing flow channel is arranged opposite to the rotor of the front bearing. The front bearing flow channel is communicated with the internal flow channel of the front end cover.

[0035] If the front end cover steel sleeve is not provided and the front bearing needs to be stabilized, then the front bearing must be abutted against the inside of the front accommodation cavity. At this time, the outer edge of the bearing will block the internal flow channel of the front end cover, and then the cooling oil flowing out through the internal flow channel of the front end cover will not be able to lubricate the front bearing.

[0036] In this application, by providing the front end cover steel sleeve and simultaneously providing the front bearing flow channel on the front end cover cylinder sleeve, at this time, the front end cover cylinder sleeve will be arranged in the area between the front bearing and the front accommodation cavity, which can first play a role in stably installing the front bearing. At the same time, the cooling oil flowing out through the front bearing flow channel will directly flow into the rotor part of the front bearing, directly lubricating the rotor, thus greatly improving the lubrication effect on the rotor.

[0037] 7. The drive motor provided by the present invention is provided with oil seals on the front end cover and / or the rear end cover, and the rear bearing flow channel and / or the front bearing flow channel are located between the rear bearing and / or the front bearing and the oil seals.

[0038] By providing the oil seals, all the cooling oil flowing out from the front bearing flow channel and the rear bearing flow channel acts on the rotor of the front bearing or the rear bearing, thereby improving the utilization efficiency of the cooling oil.

[0039] 7. The drive motor provided by the present invention is provided with end cover nozzles on the front end cover and / or the rear end cover that are connected to the internal flow channels of the front end cover and / or the internal flow channels of the rear end cover, and the cooling oil flowing out through the end cover nozzles is sprayed onto the rotor.

[0040] By providing the end cover nozzles, the cooling oil flowing out through the internal flow channels of the front end cover and the internal flow channels of the rear end cover can not only act on the positions of the front bearing and the rear bearing, but also directly act on the rotor, thereby improving the cooling capacity of both ends of the rotor. At the same time, by providing the end cover nozzles, the cooling oil in the internal flow channels of the front end cover or the internal flow channels of the rear end cover can act on both the bearing and the rotor simultaneously, thereby effectively improving the utilization efficiency of the cooling oil.

[0041] At the same time, by providing the oil seals, since the bearing adopts a structure without a dust cover, the cooling oil can flow out of this sealed space through the gap between the inner and outer raceways of the bearing. This structure can achieve double lubrication of the bearing and the oil seal.

[0042] 8. The drive motor provided by the present invention has a plurality of the end cover nozzles arranged in a ring, and a drainage channel is connected between a plurality of the injection holes on the rear end cover.

[0043] The multiple end cover nozzles arranged in a ring can fully exchange heat and lubricate the end of the rotor, thereby effectively improving the cooling capacity of the end of the rotor.

[0044] 9. The drive motor provided by the present invention has a weight reduction hole extending along the axial direction of the rotor on the rotor, and the cooling oil flowing out through the end cover nozzles flows into the weight reduction hole. Thereby achieving the purpose of cooling the entire rotor from the central part of the rotor.

[0045] 10. The drive motor provided by the present invention has a winding wire package on the stator, and an oil injection hole is opened on the hollowed-out part in the direction towards the winding wire package.

[0046] Through the combination of the hollowed-out part and the oil injection hole, the cooling oil can extend to the parts where the winding wire packages are located on both sides of the stator, so that the cooling oil in the hollowed-out part directly acts on the winding wire packages, thereby improving the cooling capacity of the winding wire packages.

[0047] 11. The drive motor provided by the present invention is provided with a nozzle detachably disposed on the fuel injection hole, and an oil guide hole communicating with the fuel injection hole is disposed on the nozzle. By adjusting the angle of the oil guide hole on the nozzle, the spraying range of the winding wire package can be improved, thereby improving the cooling capacity and flexibility of the winding wire package.

[0048] 12. The drive motor provided by the present invention is provided with a slotted head on the surface of the nozzle close to the stator, and the slotted head communicates with the oil guide hole.

[0049] Through the slotted head, the nozzle can disperse the cooling oil into a fan-shaped mist in a line shape, so that the contact area with the winding wire package is larger, the cooling is more sufficient, and the temperature reduction effect is more significant.

[0050] 13. The vehicle provided by the present invention includes the drive motor provided by the present invention. Since the drive motor provided by the present invention has good heat dissipation capacity, the vehicle has better driving stability. Description of the Drawings

[0051] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0052] Figure 1 It is a schematic structural diagram of the drive motor provided by the present invention;

[0053] Figure 2 It is an assembly schematic diagram between the front (rear) bearing and the front (rear) end cover provided by the present invention;

[0054] Figure 3 It is a schematic structural diagram of the stator provided by the present invention;

[0055] Figure 4 It is a schematic structural diagram of the second stator provided by the present invention;

[0056] Figure 5 It is an axial sectional view of the housing provided by the present invention;

[0057] Figure 6 It is a schematic diagram when the oil inlet hole sprays oil into the radial hole of the stator provided by the present invention;

[0058] Figure 7 It is a sectional view of the front end cover steel sleeve or the rear end cover cylinder sleeve provided by the present invention.

[0059] Description of the reference numerals:

[0060] 1 - Housing; 1a - Hollowed-out part; 1b - Oil inlet hole; 1c - Housing oil outlet hole; 1d - Oil injection hole; 2 - Front end cover; 2a - Front accommodation cavity; 3 - Rear end cover; 3a - Rear accommodation cavity; 4 - Stator; 4a - First iron core; 4b - Second iron core; 4b1 - Stator radial hole; 5 - Rotating shaft; 6 - Rotor; 6a - Weight reduction hole; 7 - Front bearing; 8 - Rear bearing; 9 - Flow channel inside the front end cover; 10 - Flow channel inside the rear end cover; 11 - Steel sleeve of the front end cover; 11a - Flow channel for the front bearing; 11b - Radial part; 11c - Axial part; 12 - Steel sleeve of the rear end cover; 12a - Flow channel for the rear bearing; 13 - Oil seal; 14 - End cover nozzle; 15 - Winding wire package; 16 - Nozzle; 16a - Oil guiding hole; 17 - Slotted crosshead. Detailed implementation mode

[0061] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work belong to the scope of protection of the present invention.

[0062] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0063] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "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 directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0064] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0065] Embodiment 1

[0066] This embodiment provides a drive motor, as Figure 1As shown, it includes: a housing, the housing includes a machine housing 1 at the middle part, and a front end cover 2 and a rear end cover 3 arranged at the left and right ends of the machine housing 1. A hollowed-out part 2 is arranged on the machine housing 1. An oil inlet hole 1b for cooling oil to flow into the hollowed-out part 2 is arranged on the machine housing 1, and an oil outlet hole 1c of the machine housing that flows out of the hollowed-out part 2 and enters the interior of the housing; a stator 4, at least one stator radial hole 4b1 is arranged on the stator 4, and the cooling oil flowing out through the oil outlet hole 1c of the machine housing flows into the stator 4 through the stator radial hole 4b1. The cooling oil flowing out through the oil outlet hole 1c of the machine housing flows into the stator 4 through the stator radial hole 4b1.

[0067] In this embodiment, the oil outlet hole 1c and the stator radial hole 4b1 can be correspondingly arranged. At this time, as Figure 1 shown, the stator radial hole 4b1 will be directly arranged directly below the oil outlet hole 1c, and the cooling oil flowing out through the oil outlet hole 1c will directly drip into the interior of the stator radial hole 4b1. As a variant, the oil outlet hole 1c and the stator radial hole 4b1 can be non-correspondingly arranged. For example, the stator radial hole 4b1 is arranged at the two side parts directly below the oil outlet hole 1c. At this time, the cooling oil will first drip to the position directly below the oil outlet hole 1c, and then flow in the two side directions in the figure and flow into the two side stator radial holes 4b1.

[0068] The number of stator radial holes 4b1 and oil outlet holes 1c can be exactly the same, or one oil outlet hole 1c can correspond to multiple stator radial holes 4b1, or multiple oil outlet holes 1c can correspond to one stator radial hole 4b1. As a preferred implementation method, in this embodiment, the number of stator radial holes 4b1 and oil outlet holes 1c is kept the same, and at the same time, the stator radial hole 4b1 is arranged directly below the oil outlet hole 1c.

[0069] In this embodiment, as Figure 1 shown, the hollowed-out part 2 is arranged in a long strip shape by itself. The oil inlet hole 1b is tangent to the outer edge of the machine housing 1, and then bends towards the center of the machine housing 1. The cooling oil flowing into the hollowed-out part 2 from the oil inlet hole 1b flows downward in the figure through the oil outlet hole 1c of the machine housing, and then flows to the position of the stator 4.

[0070] Specifically, the hollowed-out part is obtained by sand mold casting, that is, a glued sand mold is placed during casting, and after molding, the sand mold is shaken and broken and poured out. The production process of the hollowed-out part is not described in detail in this embodiment.

[0071] In this embodiment, as Figure 3 and Figure 4As shown, the stator 4 is arranged in a hollow cylindrical shape. The stator 4 includes a number of first iron cores 4a of the stator 4 arranged side by side with each other. At the positions where two adjacent first iron cores 4a of the stator 4 correspond to the oil outlet hole 1c of the housing, a second iron core 4b of the stator 4 is provided, and a stator radial hole 4b1 is provided on the second iron core 4b of the stator 4.

[0072] Specifically, as Figure 4 shown, wiring grooves are provided on the inner walls of the first iron core 4a and the second iron core 4b, and the windings are installed on the wiring grooves. In this embodiment, a second iron core 4b is clamped between two adjacent first iron cores 4a. The stator radial hole 4b1 provided on the second iron core 4b is arranged at a position below the oil outlet hole 1c of the housing. When the cooling oil flows out from the oil outlet hole 1c of the housing, it will enter the interior of the stator radial hole 4b1. At this time, the shape of the cooling oil is as Figure 6 shown in B in

[0073] In this embodiment, the stator radial holes 4b1 of several second iron cores 4b are arranged in a spiral shape. The connection lines between multiple stator radial holes 4b1 are spiral lines. The spiral line can be a complete spiral or a partial spiral.

[0074] In this embodiment, along the extending direction of the spiral line of the drive motor, the stator radial hole 4b1 of the second iron core 4b at the starting end and the stator radial hole 4b1 of the second iron core 4b at the ending end are on the same straight line. Since the stator radial hole 4b1 at the starting end and the stator radial hole 4b1 at the ending end are on the same straight line, the stator 4 can receive the cooling oil in the entire circumferential direction. The cooling oil further flows to the rotor 6. When the rotor 6 rotates, the entire rotor 6 is lubricated, thereby greatly enhancing the cooling capacity of the stator 4 and the rotor 6.

[0075] In this embodiment, the drive motor further includes a rotating shaft 5. A rotor 6 is sleeved on the rotating shaft 5. A front receiving cavity 2a is provided on the front end cover 2, and a front bearing 7 is provided in the front receiving cavity 2a. A rear receiving cavity 3a is provided on the rear end cover 3, and a rear bearing 8 is provided in the rear receiving cavity 3a. The rotating shaft 5 rotates through the front bearing 7 and the rear bearing 8.

[0076] Specifically, as Figure 1 shown, the front receiving cavity 2a and the rear receiving cavity 3a are arranged opposite to each other. A through hole is provided at the central part of the front receiving cavity 2a in the figure, and the rotating shaft 5 is arranged outside the front end cover 2 through the through hole.

[0077] In this embodiment, lateral flow channels are simultaneously provided in the regions between the hollowed-out part 2 and the front bearing 7 on the housing 1 and the front end cover 2, and in the regions between the hollowed-out part 2 and the rear bearing 8 on the housing 1 and the rear end cover 3. AsFigure 1 As shown, the lateral flow channel includes: a front end cover built-in flow channel 9 arranged between the hollow portion 2 and the front bearing 7; and a rear end cover built-in flow channel 10 arranged between the hollow portion 2 and the rear bearing 8.

[0078] In this embodiment, the cooling oil flowing in through the oil inlet hole 1b itself has a certain pressure. The cooling oil located in the hollow portion 2 will flow into the built-in flow channel 9 of the front end cover and the built-in flow channel 10 of the rear end cover under the action of pressure. The cooling oil can take away the heat generated by the bearing during high rotation, thereby cooling the front bearing 7 and the rear bearing 8, and lubricating the front bearing 7 and the rear bearing 8 at the same time.

[0079] In this embodiment, Figure 2 As shown, a front end cover steel sleeve 11 is arranged in the front accommodating chamber 2a, the front bearing 7 is arranged inside the front end cover steel sleeve 11, and the front end cover steel sleeve 11 is provided with a front bearing flow channel 11a, the front bearing flow channel 11a is arranged opposite to the rotor 6 of the front bearing 7, and the front bearing flow channel 11a is connected with the built-in flow channel 9 of the front end cover.

[0080] By providing the front end cover steel sleeve 11 and providing the front bearing flow channel 11a on the front end cover 2 cylinder sleeve, the front end cover 2 cylinder sleeve will be provided in the area between the front bearing 7 and the front accommodating chamber 2a, which can firstly play the role of stabilizing the installation of the front bearing 7. At the same time, the cooling oil flowing out through the front bearing flow channel 11a will directly flow into the rotor 6 part of the front bearing 7, directly lubricate the rotor 6, thereby greatly improving the lubrication effect on the rotor 6.

[0081] Specifically, Figure 2 and Figure 7 As shown, the front end cover steel sleeve 11 includes an axial portion and a radial portion extending toward the front bearing 7. By arranging a front bearing flow channel 11a on the radial portion, the outlet of the front bearing flow channel 11a is arranged opposite to the front bearing 7. The cooling oil can directly act on the front bearing 7 after flowing out, which greatly improves the use efficiency of the cooling oil and avoids wasting the cooling oil.

[0082] Meanwhile, in this embodiment, a rear end cover steel sleeve 12 is provided in the rear accommodation cavity 3a, the rear bearing 8 is provided inside the rear end cover steel sleeve 12, and the rear end cover steel sleeve 12 is provided with a rear bearing flow channel 12a, the rear bearing flow channel 12a is arranged opposite to the rotor 6 of the rear bearing 8, and the rear bearing flow channel 12a is connected to the rear end cover built-in flow channel 10. The rear bearing flow channel 12a has the same properties as the front bearing flow channel 11a, and the outlet of the rear bearing flow channel 12a is arranged opposite to the rear bearing 8, and the cooling oil can directly act on the rear bearing 8 after flowing out, which greatly improves the use efficiency of the cooling oil and avoids wasting the cooling oil.

[0083] In this embodiment, as Figure 2 shown, an oil seal 13 is provided on the front end cover 2 and the rear end cover 3. The rear bearing flow passage 12a is located in the area between the rear bearing 8 and the oil seal 13, and the front bearing flow passage 11a is located in the area between the front bearing 7 and the oil seal 13. By providing the oil seal 13, all the cooling oil flowing out from the front bearing flow passage 11a and the rear bearing flow passage 12a acts on the rotor 6 of the front bearing 7 or the rear bearing 8, thereby improving the utilization efficiency of the cooling oil.

[0084] Specifically, the oil seal 13 is made of a flexible coil. Its inner edge is tightly connected to the rotating shaft 5 and is driven by the rotating shaft 5. The outer edge is set to abut against the through hole of the front end cover 2 or the rear end cover 3.

[0085] In this embodiment, as Figure 1 shown, a end cover nozzle 14 communicating with the built-in flow passage 10 of the rear end cover is provided on the rear end cover 3, and the cooling oil flowing out through the end cover nozzle 14 is sprayed onto the rotor 6.

[0086] By providing the end cover nozzle 14, the cooling oil flowing out through the built-in flow passage 10 of the rear end cover can not only act on the position of the rear bearing 8, but also directly act on the rotor 6, thereby improving the cooling capacity of both ends of the rotor 6. By providing the end cover nozzle 14, the cooling oil in the built-in flow passage 10 of the rear end cover can act on both the bearing and the rotor 6 at the same time, thereby effectively improving the utilization efficiency of the cooling oil. At the same time, since the cooling oil itself has a certain pressure, as Figure 1 shown, the cooling oil flowing out through the end cover nozzle 14 can gradually penetrate the rotor 6 to the right side of the rotor 6, that is, the side of the rotor 6 close to the front end cover 2, thereby effectively improving the utilization efficiency of the cooling oil.

[0087] In this embodiment, an end cover nozzle 14 can also be provided on the front end cover 2, and its nature is the same as the function of the end cover nozzle 14 of the rear end cover 3, and will not be described in detail here.

[0088] In this embodiment, a plurality of the end cover nozzles 14 are arranged in a ring shape, and a drainage channel is connected between the injection holes of the plurality of rear end covers 3. By providing the drainage channel, the cooling oil between the multiple end cover nozzles 14 can communicate with each other, so as to spray the cooling oil in the built-in flow passage 10 of the rear end cover onto the entire axial end face of the rotor 6.

[0089] In this embodiment, as Figure 1 shown, a weight reduction hole 6a extending along the axial direction of the rotor 6 is provided on the rotor 6, and the cooling oil flowing out through the end cover nozzle 14 flows into the weight reduction hole 6a, so as to achieve the purpose of cooling the whole rotor 6 from the central part of the rotor 6.

[0090] In this embodiment, asFigure 1 As shown, a winding wire package 15 is provided on the stator 4, and an oil injection hole 1d is formed in the hollowed-out portion 2 and is arranged in the direction of the winding wire package 15. Through the combination of the hollowed-out portion 2 and the oil injection hole 1d, the cooling oil can extend to the positions where the winding wire packages 15 on both sides of the stator 4 are located, so that the cooling oil in the hollowed-out portion 2 directly acts on the winding wire package 15, thereby improving the cooling capacity for the winding wire package 15.

[0091] In this embodiment, as Figure 5 shown, a nozzle 16 is detachably arranged on the oil injection hole 1d, and an oil guiding hole 16a communicating with the oil injection hole 1d is arranged on the nozzle 16. By adjusting the angle of the oil guiding hole 16a on the nozzle 16, the spraying range for the winding wire package 15 can be increased, thereby improving the cooling capacity and flexibility for the winding wire package 15. At the same time, as Figure 5 shown, a slotted hole 17 is arranged on the surface of the nozzle 16 close to the stator 4, and the slotted hole 17 communicates with the oil guiding hole 16a. Through the slotted hole 17, the nozzle 16 can disperse the cooling oil into a linear fan-shaped mist, so that the contact area with the winding wire package 15 is larger, the cooling is more sufficient, and the temperature reduction effect is more remarkable.

[0092] In this application, as a variant, the nozzle 16 may not be arranged on the oil injection hole 1d. At this time, the aperture size of the oil injection hole 1d needs to be adjusted so that the oil injection hole 1d is a fine hole, and multiple fine holes can form a spray.

[0093] Embodiment 2

[0094] This embodiment provides an automobile, including the drive motor provided by the present invention. Specifically, the automobile may be a new energy vehicle or an ordinary vehicle.

[0095] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the present invention.

Claims

1. A drive motor, characterized in that, Comprising: A housing, including a casing (1), a front end cover (2) and a rear end cover (3) provided at both ends of the casing (1). A hollowed-out portion (1a) is provided on the casing (1). An oil inlet hole (1b) for cooling oil to flow into the hollowed-out portion (1a) is provided on the casing (1), and a casing oil outlet hole (1c) for the cooling oil to flow out of the hollowed-out portion (1a) and into the interior of the housing is provided; A stator (4), coaxially arranged with the housing. At least one stator radial hole (4b1) is provided on the stator (4). The cooling oil flowing out through the casing oil outlet hole (1c) flows into the stator (4) through the stator radial hole (4b1); The stator (4) includes a plurality of stator (4) first iron cores (4a) arranged side by side with each other. A stator (4) second iron core (4b) is provided at a position corresponding to the casing oil outlet hole between two adjacent stator (4) first iron cores (4a). The stator radial hole (4b1) is provided on the stator (4) second iron core (4b). The stator radial holes (4b1) of the plurality of second iron cores (4b) are arranged in a spiral shape.

2. The drive motor according to claim 1, wherein Along the extending direction of the spiral line, the stator radial holes (4b1) of the second iron core (4b) at the starting end and the stator radial holes (4b1) of the second iron core (4b) at the ending end are on the same straight line.

3. The drive motor according to claim 2, characterized in that It further includes a rotating shaft (5). A rotor (6) is sleeved on the rotating shaft (5). A front accommodation cavity (2a) is provided on the front end cover (2). A front bearing (7) is provided in the front accommodation cavity (2a). A rear accommodation cavity (3a) is provided on the rear end cover (3). A rear bearing (8) is provided in the rear accommodation cavity (3a). The rotating shaft (5) rotates through the front bearing (7) and the rear bearing (8); A lateral flow channel is provided in the area between the hollowed-out portion (1a) and the front bearing (7) on the casing (1) and the front end cover (2); and / or, A lateral flow channel is provided in the area between the hollowed-out portion (1a) and the rear bearing (8) on the casing (1) and the rear end cover (3).

4. The drive motor according to claim 3, characterized in that, The lateral flow channel includes: A front end cover internal flow channel (9) provided between the hollowed-out portion (1a) and the front bearing (7); And, A rear end cover internal flow channel (10) provided between the hollowed-out portion (1a) and the rear bearing (8).

5. The drive motor according to claim 4, wherein A front end cover steel sleeve (11) is provided in the front accommodation cavity (2a). The front bearing (7) is provided inside the front end cover (2) steel sleeve. The front end cover (2) steel sleeve is provided with a front bearing flow channel (11a). The front bearing flow channel (11a) is arranged opposite to the rotor (6) of the front bearing (7). The front bearing flow channel (11a) is communicated with the front end cover internal flow channel (9).

6. The drive motor according to claim 5, characterized in that A rear end cover steel sleeve (12) is arranged in the rear accommodating cavity (3a). The rear bearing (8) is arranged inside the steel sleeve of the rear end cover (3). The steel sleeve of the rear end cover (3) is provided with a rear bearing flow channel (12a). The rear bearing flow channel (12a) is arranged opposite to the rotor (6) of the rear bearing (8). The rear bearing flow channel (12a) is communicated with the internal flow channel (10) of the rear end cover.

7. The drive motor according to claim 6, characterized in that, An oil seal (13) is arranged on the front end cover (2) and / or the rear end cover (3). The rear bearing flow channel (12a) and / or the front bearing flow channel (11a) are located between the rear bearing (8) and / or the front bearing (7) and the oil seal (13).

8. The drive motor according to claim 4, characterized in that A end cover nozzle (14) communicated with the internal flow channel (9) of the front end cover and / or the internal flow channel (10) of the rear end cover is arranged on the front end cover (2) and / or the rear end cover (3). The cooling oil flowing out through the end cover nozzle (14) is sprayed onto the rotor (6).

9. The drive motor according to claim 8, characterized in that, A plurality of the end cover nozzles (14) are arranged in a ring shape, and a drainage channel is connected between a plurality of spray holes of the rear end cover (3).

10. The drive motor according to claim 8 or 9, characterized in that, A weight reduction hole (6a) extending along the axial direction of the rotor (6) is arranged on the rotor (6). The cooling oil flowing out through the end cover nozzle (14) flows into the weight reduction hole (6a).

11. The drive motor according to claim 1, characterized in that, A winding wire package (15) is arranged on the stator (4), and an oil injection hole (1d) facing the winding wire package (15) is formed in the hollowed-out portion (1a).

12. The drive motor according to claim 11, characterized in that, A nozzle (16) is detachably arranged on the oil injection hole (1d), and an oil guiding hole (16a) communicated with the oil injection hole (1d) is arranged on the nozzle (16).

13. The drive motor according to claim 12, characterized in that, A single-slot (17) is arranged on the surface of the nozzle (16) close to the stator (4), and the single-slot (17) is communicated with the oil guiding hole (16a).

14. A vehicle, characterized in that, Comprising The drive motor according to any one of claims 1-13.

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