Motor oil guide piece, motor and vehicle

Abstract

The utility model provides a motor oil guide piece, a motor and a vehicle, the motor oil guide piece comprises an oil guide piece body, and the oil guide piece body is provided with a first oil guide hole used for guiding cooling oil to a bearing. According to the motor oil guide piece, the cooling oil can be guided into the shaft hole for cooling, and part of the cooling oil can be guided to the bearing to lubricate the bearing, so that the use performance of the bearing can be improved, and the smoothness of a rotating shaft in the rotating process can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a motor oil guide, a motor applying the motor oil guide and a vehicle applying the motor. BACKGROUND

[0002] The permanent magnet synchronous motor is a synchronous motor using a permanent magnet to generate a magnetic field. The permanent magnet synchronous motor is widely applied to the driving system of an electric vehicle. At present, an oil-cooled motor is widely applied due to its high power density and good heat dissipation effect.

[0003] In the related art, the oil-cooled motor includes an oil inlet pipe, a rotating shaft, a bearing, a rear end cover, a rear end cover cover plate and an oil guide. The rear end cover and the rear end cover cover plate are connected together. The oil inlet pipe is used to transport cooling oil. The rotating shaft has a shaft hole. The bearing is arranged between the rotating shaft and the rear end cover. The rear end cover is arranged around the rotating shaft. The oil guide is connected to the rear end cover, and part of the structure of the oil guide extends into the shaft hole. The oil guide, the rear end cover and the rear end cover cover plate enclose an oil storage cavity. The oil inlet pipe extends into the oil storage cavity. The oil guide is provided with an oil guide hole communicating the oil storage cavity and the shaft hole, so that the cooling oil in the oil inlet pipe can flow into the shaft hole through the oil storage cavity and the oil guide hole in sequence to cool the rotating shaft.

[0004] However, in the process of cooling the rotating shaft, the bearing cannot be lubricated in the above oil-cooled motor, thereby affecting the rotation of the rotating shaft and the normal use of the motor. Utility model content

[0005] The present application provides a motor oil guide, a motor and a vehicle. The motor oil guide can not only guide cooling oil into the shaft hole of the rotating shaft to cool the rotating shaft, but also guide part of the cooling oil to the bearing to lubricate the bearing, thereby improving the smoothness of the rotating shaft during rotation and maintaining the normal use of the motor.

[0006] In a first aspect, the present application provides a motor oil guide, which includes an oil guide body. The oil guide body includes a main body part and an oil guide part connected together. The main body part is used to be connected with a rear end cover assembly of a motor. The oil guide part is used to extend into a shaft hole of a rotating shaft of the motor. A first oil guide hole is arranged on the main body part and used to guide cooling oil to a bearing. An end part of the oil guide part away from the main body part is provided with a second oil guide hole used to guide the cooling oil into the shaft hole. The axial direction of the second oil guide hole is consistent with the axial direction of the rotating shaft. The diameter of the second oil guide hole is greater than or equal to 4.0 mm and less than or equal to 4.5 mm.

[0007] As an optional implementation, the main body is a ring-shaped member, the main body comprises a mounting ring located at the periphery and an oil guiding ring connected to the inner side of the mounting ring, the mounting ring is connected with the rear end cover assembly, and the oil guiding part is connected with the oil guiding ring; wherein a plurality of first oil guiding holes are arranged on the oil guiding ring and are uniformly distributed along the circumferential direction of the oil guiding ring.

[0008] As an optional implementation, at least two third oil guiding holes are arranged on the side wall of the oil guiding part and are uniformly distributed; the third oil guiding holes are used for guiding the cooling oil to the bearing.

[0009] In the second aspect, the application provides an electric machine, comprising an oil inlet pipe, a rotating shaft, a rear end cover assembly, a bearing and the above-mentioned oil guiding part of the electric machine; the oil inlet pipe is used for conveying cooling oil; the rotating shaft has a shaft hole; the rear end cover assembly is partially arranged around the rotating shaft; the bearing is arranged between the rotating shaft and the rear end cover assembly; the oil guiding part body is connected to the rear end cover assembly, and part of the oil guiding part body extends into the shaft hole; the oil guiding part body and the rear end cover assembly enclose an oil storage cavity, and the oil inlet pipe extends into the oil storage cavity; wherein the first oil guiding hole is used for guiding the cooling oil in the oil storage cavity to the bearing; the second oil guiding hole is arranged on the oil guiding part body and communicates the oil storage cavity and the shaft hole.

[0010] As an optional implementation, the oil guiding part body comprises a main body and an oil guiding part connected together, the main body is connected with the rear end cover assembly, and the oil guiding part extends into the shaft hole; the oil storage cavity comprises a first cavity and a second cavity connected together, the main body and the rear end cover assembly enclose the first cavity, and the second cavity is formed in the oil guiding part; the first oil guiding hole is arranged on the main body and is used for guiding the cooling oil in the first cavity to the bearing; the second oil guiding hole is arranged on the oil guiding part and is used for guiding the cooling oil in the second cavity into the shaft hole.

[0011] As an optional implementation, an annular cavity is formed between the oil guiding part and the inner wall of the shaft hole; the third oil guiding hole is arranged on the side wall of the oil guiding part and communicates the second cavity and the annular cavity; an oil passing gap is formed between the end of the rotating shaft close to the first cavity and the main body, one end of the oil passing gap communicates the annular cavity, and the other end of the oil passing gap corresponds to the bearing.

[0012] As an optional implementation, in the direction from close to the first cavity to far from the first cavity, the shaft hole comprises a first straight hole section, a first transition hole section and a second straight hole section connected in sequence, the hole diameter of the first straight hole section is smaller than the hole diameter of the second straight hole section, and the hole diameter of the first transition hole section gradually increases in the direction from the first straight hole section to the second straight hole section; wherein, in the axial direction of the rotating shaft, the size of the first straight hole section is a first size, the size of the first transition hole section is a second size, the size of the second straight hole section is a third size, and the size of the oil guiding part is a fourth size, the fourth size is greater than or equal to the sum of the first size and the second size and smaller than the third size; the fourth size is greater than or equal to 70.3 millimeters and smaller than or equal to 70.7 millimeters.

[0013] As an optional implementation, a plurality of fourth oil guiding holes are arranged on the side wall of the second straight hole section; the outlet of the fourth oil guiding hole is arranged towards the bearing.

[0014] As an optional implementation, the rear end cover assembly comprises a rear end cover and a cover plate connected together, the rear end cover is arranged around the rotating shaft, and the oil guiding part body is connected to the rear end cover; the oil guiding part body, the rear end cover and the cover plate jointly enclose the oil storage cavity.

[0015] In a third aspect, the application provides a vehicle comprising the electric machine.

[0016] The electric machine oil guiding part, the electric machine and the vehicle provided by the application have the first oil guiding hole arranged on the oil guiding part body of the electric machine oil guiding part, which is used to guide the cooling oil to the bearing. Therefore, compared with the oil guiding part in the related art, the electric machine oil guiding part provided by the application not only can guide the cooling oil from the oil inlet pipe into the shaft hole of the rotating shaft to cool the rotating shaft, but also can transmit part of the cooling oil output by the oil inlet pipe to the bearing through the first oil guiding hole to lubricate the bearing, so that the bearing can maintain good use performance and the rotating shaft can rotate more smoothly. In this way, the use performance of the electric machine provided by the application can be improved, and the cooling oil input by the oil inlet pipe can be fully utilized. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The electric machine oil guiding part provided by the application is a three-dimensional structure schematic diagram;

[0018] Figure 2 The electric machine oil guiding part provided by the application is a three-dimensional structure schematic diagram; Figure 1 The structure schematic diagram in another perspective view;

[0019] Figure 3 The electric machine provided by the application is a structure schematic diagram;

[0020] Figure 4 The electric machine provided by the application is a structure schematic diagram of a local structure;

[0021] Figure 5 Fig. 1 is a perspective view of the present application; Figure 4 Fig. 2 is a sectional view along A-A direction;

[0022] Figure 6 Fig. 3 is a sectional view along B-B direction; Figure 5 Fig. 4 is an enlarged view of the partial structure at B;

[0023] Figure 7 Fig. 5 is a sectional view along C-C direction; Figure 4 Fig. 6 is a sectional view along D-D direction;

[0024] Figure 8 Fig. 7 is an enlarged view of the partial structure at D; Figure 7

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 1, housing; 2, oil inlet pipe; 3, rotating shaft; 4, rear end cover assembly; 5, fixed disc; 6, bearing; 7, oil guide body; 8, magnetic steel; 9, oil storage cavity;

[0027] 31, shaft hole; 32, first shaft section; 33, second shaft section; 34, third shaft section; 41, rear end cover; 42, cover plate; 43, sealing element; 71, second oil guide hole; 72, first oil guide hole; 73, main body part; 74, oil guide part; 91, first cavity; 92, second cavity; 10, rotary transformer rotor; 20, rotary transformer stator; 30, annular gap; 40, screw; 50, annular cavity; 60, oil passing gap; l1, first dimension; l2, second dimension; l3, third dimension; l4, fourth dimension;

[0028] 100, motor; 311, first straight hole section; 312, first transition hole section; 313, second straight hole section; 314, second transition hole section; 315, third straight hole section; 731, mounting ring; 732, oil guide ring; 733, reinforcing plate; 741, third oil guide hole;

[0029] 3131, fourth oil guide hole; 7311, connecting hole. DETAILED DESCRIPTION

[0030] The technical solutions in the present application will be described in detail below with reference to the drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " represents the meaning of or, for example, A / B can represent A or B: "and / or" in the text only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0031] ​Hereinafter, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are used only for the purpose of description, and cannot be understood as implying or suggesting relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features.

[0032] In the related art, the oil-cooled motor includes an oil inlet pipe, a rotating shaft, a rear end cover, a rear end cover cover plate and an oil guide, the rear end cover and the rear end cover cover plate are connected together, the oil inlet pipe is used for conveying cooling oil, the rotating shaft has a shaft hole, the rear end cover is arranged around the rotating shaft, the oil guide is connected on the rear end cover, and part of the structure of the oil guide extends into the shaft hole, the oil guide, the rear end cover and the rear end cover cover plate enclose an oil storage cavity, the oil inlet pipe extends into the oil storage cavity, and the oil guide is provided with an oil guide hole communicating the oil storage cavity and the shaft hole, so that the cooling oil in the oil inlet pipe can flow into the shaft hole through the oil storage cavity and the oil guide hole in sequence to cool the rotating shaft.

[0033] However, in the above-mentioned oil-cooled motor, the bearing cannot be lubricated during the cooling of the rotating shaft, thereby affecting the rotation of the rotating shaft and the normal use of the motor.

[0034] Therefore, the embodiment of the present application provides an oil guide of a motor, a motor and a vehicle. The first oil guide hole is arranged on the oil guide body of the oil guide of the motor, so that the oil guide of the motor can not only guide the cooling oil in the oil inlet pipe into the shaft hole of the rotating shaft, but also guide part of the cooling oil to the bearing to lubricate the bearing. In this way, the bearing can maintain good use performance and improve the smoothness of the rotating shaft during rotation.

[0035] It should be noted that the above-mentioned motor includes but is not limited to an oil-cooled motor, and the above-mentioned vehicle includes but is not limited to an electric vehicle. Herein, the type of the motor and the vehicle provided by the embodiment of the present application is not specifically limited.

[0036] The embodiment of the present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Please refer to Figures 1 to 4 , Figure 1 the three-dimensional structure diagram of the oil guide of the motor provided by the embodiment of the present application, Figure 2 the structure diagram of the oil guide of the motor provided by the embodiment of the present application, Figure 1 the structure diagram of the oil guide of the motor provided by the embodiment of the present application, Figure 3 the structure diagram of the motor provided by the embodiment of the present application, Figure 4 the structure diagram of the motor provided by the embodiment of the present application. As shown in the figure, the embodiment of the present application provides an oil guide of a motor, which includes an oil guide body 7, and the oil guide body 7 is provided with a first oil guide hole 72 for guiding cooling oil to the bearing 6.

[0038] Therefore, compared with the oil guide in the related art, the motor oil guide provided by the application can not only guide the cooling oil from the oil inlet pipe 2 of the motor 100 into the shaft hole of the rotating shaft 3 to cool the rotating shaft 3, but also can transmit part of the cooling oil output by the oil inlet pipe 2 to the bearing 6 through the first oil guide hole 72 to lubricate the bearing 6, so that the bearing 6 can maintain good use performance. In this way, the smoothness of the rotating shaft 3 during rotation can be improved, and the cooling oil input by the oil inlet pipe 2 can be fully utilized.

[0039] Further, please refer to Figures 5 to 8 , Figure 5 for Figure 4 the sectional view along the A-A direction, Figure 6 for Figure 5 the enlarged schematic view of the local structure at B in FIG. Figure 7 for Figure 4 the sectional view along the C-C direction, Figure 8 for Figure 7 the enlarged schematic view of the local structure at D in FIG. Among them, Figure 5 and Figure 7 the arrow direction in the figure is the flow direction of the cooling oil.

[0040] As shown in the figure, in some specific embodiments, the oil guide body 7 includes a main body part 73 and an oil guide part 74 connected together, the main body part 73 is used to be connected with the rear end cover assembly 4 of the motor 100, and the oil guide part 74 is used to extend into the shaft hole 31 of the rotating shaft 3 of the motor 100.

[0041] The first oil guide hole 72 is opened on the main body part 73; and the second oil guide hole 71 for guiding the cooling oil into the shaft hole 31 is opened on the end of the oil guide part 74 away from the main body part 73. Through the setting of the second oil guide hole 71, the cooling oil in the oil inlet pipe 2 can be guided into the shaft hole 31 to cool the shaft hole 31.

[0042] It can be understood that the hole diameter of the second oil guide hole 71 also affects the cooling effect of the cooling oil on the rotating shaft 3. Therefore, in the present embodiment, the hole diameter of the second oil guide hole 71 is also limited. Specifically, the axial direction of the second oil guide hole 71 is consistent with the axial direction of the rotating shaft 3, and the hole diameter of the second oil guide hole 71 is greater than or equal to 4.0 millimeters and less than or equal to 4.5 millimeters. In this way, the hole diameter of the second oil guide hole 71 is a relatively appropriate value, which maintains the oil inlet pressure of the shaft hole 31.

[0043] On one hand, the second cavity 92 and the shaft hole 31 can have a pressure difference, so that the cooling oil flows from the second cavity 92 to the shaft hole 31 in a jet shape, thereby improving the cooling effect on the rotating shaft 3. On the other hand, the second oil guide hole 71 can have a small diameter, so that the cooling oil is blocked in the second oil guide hole 71 during the flow, thereby affecting the cooling effect on the rotating shaft 3.

[0044] For example, the diameter of the second oil guide hole 71 can be 4.0 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, etc. Here, the diameter of the second oil guide hole 71 is not specifically limited.

[0045] For the specific structure of the oil guide body 7, the main body 73 can be an annular member, the main body 73 includes a mounting ring 731 on the periphery and an oil guide ring 732 connected to the inner side of the mounting ring 731, the mounting ring 731 is used to connect with the rear end cover assembly 4, and the oil guide part 74 is connected with the oil guide ring 732.

[0046] It can be understood that during the operation of the motor 100, the amount of cooling oil input into the oil inlet pipe 2 can not be sufficient. Therefore, in order to ensure that the cooling oil can still flow to the bearing 6 through the first oil guide hole 72 when the cooling oil is insufficient. In some embodiments, a plurality of first oil guide holes 72 are arranged on the oil guide ring 732 and are uniformly distributed along the circumference of the oil guide ring 732. In this way, even when the amount of cooling oil is insufficient, the first oil guide holes 72 are still distributed at the bottom of the oil guide ring 732. Thus, under the action of gravity, the cooling oil can flow to the bearing 6 through the first oil guide holes 72 located at the bottom of the oil guide ring 732.

[0047] In the specific embodiment of the present embodiment, since the oil guide ring 732 is arranged to protrude towards the side close to the cover plate 42 compared to the mounting ring 731, in order to improve the structural strength of the oil guide body 7, the side of the oil guide ring 732 away from the oil inlet of the first oil guide hole 72 and the side of the mounting ring 731 away from the cover plate 42 are further connected by a reinforcing plate 733. In this way, by arranging the reinforcing plate 733, the structural strength of the motor oil guide provided in the present embodiment can be improved, thereby prolonging the service life of the motor oil guide provided in the present embodiment, and further prolonging the service life of the motor 100 provided in the present embodiment.

[0048] More specifically, in the present embodiment, a plurality of reinforcing plates 733 are uniformly distributed along the circumference of the oil guide body 7, and one reinforcing plate 733 is arranged between two adjacent first oil guide holes 72. For example, as shown in FIG. 6, the reinforcing plate 733 is arranged between the first oil guide holes 72. Figure 7As shown, in this embodiment, there are 7 first oil guide holes 72 and 7 first reinforcing plates 733, and the diameter of the first oil guide holes 72 is 2 mm. Thus, by limiting the diameter and number of the first oil guide holes 72, after assembly, the motor oil guide component body 7 can be guaranteed to have 3 first oil guide holes 72 at its bottom. Even when the flow rate is insufficient (assuming it is 10 L / min), the cooling oil can still flow through the first oil guide holes 72 to the bearing 6.

[0049] In this embodiment, the motor oil guide component is a one-piece molded part. Therefore, the mounting ring 731, the oil guide ring 732, and the oil guide portion 74 are integrally molded to form the oil guide component body 7. The material of the motor oil guide component can be plastic or metal, and no specific limitation is made here.

[0050] like Figure 3 and Figure 4 As shown, this embodiment also provides a motor 100, including a housing 1, an oil inlet pipe 2, a rotating shaft 3, a rear end cover assembly 4, a bearing 6, and the motor oil guide component described in the above embodiment. The housing 1 can be fixed to the vehicle body. The oil inlet pipe 2 is connected to the housing 1, and the oil inlet end of the oil inlet pipe 2 is connected to an oil pump. The oil pump can pump cooling oil from the cooling oil tank into the oil inlet pipe 2, so that the cooling oil is delivered to the rotating shaft 3 through the oil inlet pipe 2. The rear end cover assembly 4 is connected to the housing 1 and located at the end of the rotating shaft 3. A portion of the structure of the rear end cover assembly 4 is arranged around the rotating shaft 3.

[0051] Understandably, in order to cool the rotating shaft 3 and the magnet 8 mounted on it, a shaft hole 31 needs to be provided inside the rotating shaft 3. Cooling oil is injected into the shaft hole 31 to cool the rotating shaft 3 and the magnet 8. The aforementioned oil guide part 74 extends into the shaft hole 31.

[0052] Among them, the magnet 8 is used to generate a constant magnetic field. During the operation of the motor 100, the temperature of the magnet 8 will also increase. Therefore, the cooling oil in the shaft hole 31 can not only cool the rotating shaft 3, but also cool the magnet 8.

[0053] Regarding the method of fixing the magnet 8, one option is to sleeve two fixing discs 5 on the outside of the rotating shaft 3, with the two fixing discs 5 arranged at intervals along the axial direction of the rotating shaft 3, and the magnet 8 bonded between the two fixing discs 5. No specific restrictions are placed on the method of fixing the magnet 8 here.

[0054] Furthermore, the rear end cover assembly 4 includes a rear end cover 41 and a cover plate 42 connected together. The rear end cover 41 is arranged around the rotating shaft 3. The main body 73 is connected to the rear end cover 41. The oil guide body 7, the rear end cover 41 and the cover plate 42 together form an oil storage cavity 9. The oil inlet pipe 2 extends into the oil storage cavity 9.

[0055] Specifically, the oil storage cavity 9 includes a first cavity 91 and a second cavity 92, the first cavity 91 is enclosed by the main body 73, the rear end cover 41 and the cover plate 42, and the second cavity 92 is formed in the oil guide portion 74. The first oil guide hole 72 is arranged on the main body 73, and the first oil guide hole 72 is used to guide the cooling oil in the first cavity 91 to the bearing 6; the second oil guide hole 71 is arranged on the oil guide portion 74, and the second oil guide hole 71 is used to guide the cooling oil in the second cavity 92 to the shaft hole 31.

[0056] It should be noted that the cover plate 42 is connected with the rear end cover 41 by screwing.

[0057] Since the rear end cover 41 and the cover plate 42 are screwed together, the sealing between the rear end cover 41 and the cover plate 42 may be poor, and therefore, in order to improve the sealing between the rear end cover 41 and the cover plate 42, a sealing member 43 is further arranged between the rear end cover 41 and the cover plate 42 in some specific embodiments. By arranging the sealing member 43, the sealing between the rear end cover 41 and the cover plate 42 can be improved, so as to avoid the dust and the like from the outside into the first cavity 91 and then into the space communicated with the first cavity 91, so that the motor 100 provided in the embodiment can maintain good use performance.

[0058] The sealing member 43 can be a sealing ring or a sealing gasket, etc. Herein, the type of the sealing member 43 is not specifically limited.

[0059] Further, the bearing 6 is arranged between the rotating shaft 3 and the rear end cover 41, and the cooling oil can flow to the bearing through the first oil guide hole 72. In this way, the rotating smoothness of the rotating shaft 3 can be improved, so as to maintain the use stability of the motor 100 provided in the embodiment.

[0060] It should be noted that in order to cool the rotating shaft 3 and the magnetic steel 8 and at the same time lubricate the bearing 6, the temperature of the cooling oil cannot be too high or too low, and in some embodiments, the temperature of the cooling oil can be 95-105 degrees, and specifically can be selected to be 100 degrees. Herein, the temperature of the cooling oil is not specifically limited.

[0061] In the specific embodiments of the embodiment, the rotating shaft 3 includes a first shaft segment 32, a second shaft segment 33 and a third shaft segment 34 connected in sequence, the first shaft segment 32 is arranged close to the first cavity 91 compared with the third shaft segment 34, and the diameter of the second shaft segment 33 is greater than the diameters of the first shaft segment 32 and the third shaft segment 34.

[0062] Correspondingly, in the direction from close to the first cavity 91 to far from the first cavity 91, the shaft hole 31 comprises a first straight hole section 311, a first transition hole section 312, a second straight hole section 313, a second transition hole section 314 and a third straight hole section 315 which are sequentially communicated. The first straight hole section 311 is formed in the first shaft section 32, the first transition hole section 312 is formed at the connection between the first shaft section 32 and the second shaft section 33, the second straight hole section 313 is formed in the second shaft section 33, the second transition hole section 314 is formed at the connection between the second shaft section 33 and the third shaft section 34, and the third straight hole section 315 is formed in the third shaft section 34.

[0063] Specifically, the hole diameter of the first straight hole section 311 and the hole diameter of the third straight hole section 315 are both smaller than the hole diameter of the second straight hole section 313, the hole diameter of the first transition hole section 312 gradually increases in the direction from the first straight hole section 311 to the second straight hole section 313, and the hole diameter of the second transition hole section 314 gradually decreases in the direction from the second straight hole section 313 to the third straight hole section 315.

[0064] In order to generate a constant magnetic field, the motor 100 provided by the embodiment further comprises a resolver rotor 10 and a resolver stator 20. The resolver rotor 10 is sleeved on the first shaft section 32, the resolver stator 20 is sleeved outside the resolver rotor 10 and located between the resolver rotor 10 and the rear end cover 41, and an annular gap 30 is formed between the resolver rotor 10 and the resolver stator 20.

[0065] For the connection mode between the mounting ring 731 and the rear end cover 41, a plurality of connection holes 7311 can be arranged on the mounting ring 731 and spaced along the circumference of the mounting ring 731, and the mounting ring 731, the resolver stator 20 and the rear end cover 41 are connected together through threaded fasteners such as screws 40 threaded through the connection holes 7311, the resolver stator 20 and the rear end cover 41. In this way, the mounting and fixing of the oil guide body 7 can be achieved. Of course, in some other embodiments, the oil guide body 7 and the rear end cover assembly 4 can also be connected in other ways, which are not limited here.

[0066] When the cooling oil in the oil inlet pipe 2 flows into the first cavity 91, the cooling oil will be divided into two parts: one part will flow to the bearing 6 through the first oil guide hole 72 and the annular gap 30 in sequence to lubricate the bearing 6; the other part will flow into the shaft hole 31 through the second cavity 92 and the second oil guide hole 71 in sequence to cool the shaft 3 and the magnetic steel 8.

[0067] Since the oil guide part 74 extends into the shaft hole 31, an annular cavity 50 is formed between the outer wall surface of the oil guide part 74 and the inner wall of the shaft hole 31. In the specific embodiment of the present embodiment, the annular cavity 50 is formed between the outer wall surface of the oil guide part 74 and the inner wall surface of the first straight hole section 311 and the inner wall surface of the first transition hole section 312.

[0068] In order to make more cooling oil flow to the bearing 6 to lubricate the bearing 6 and keep the bearing 6 in good use performance, in some embodiments, a third oil guiding hole 741 is formed in the side wall of the oil guiding part 74 and communicates the second cavity 92 with the annular cavity 50, and an oil passing gap 60 is formed between the end of the shaft 3 close to the first cavity 91 and the main body part 73. Specifically, an oil passing gap 60 is formed between the end of the first shaft segment 32 close to the first cavity 91 and the oil guiding ring 732.

[0069] The third oil guiding hole 741 is used to guide the cooling oil in the second cavity 92 to the annular cavity 50 and then to the bearing 6 through the oil passing gap 60 and the annular gap 30. In this way, more cooling oil can flow to the bearing 6 to lubricate the bearing 6, so that the bearing 6 can keep good use performance, and the motor 100 provided in the embodiment can keep good use performance.

[0070] In the embodiment, at least two third oil guiding holes 741 are formed in the side wall of the oil guiding part 74, and the diameter of the third oil guiding hole 741 is greater than or equal to 2.0 mm and less than or equal to 2.5 mm.

[0071] In this way, when the flow of the cooling oil is insufficient, part of the cooling oil in the second cavity 92 can still flow through the third oil guiding hole 741 and then flow through the annular cavity 50, the oil passing gap 60 and the annular gap 30 to the bearing 6 to lubricate the bearing 6.

[0072] For example, the diameter of the third oil guiding hole 741 can be 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, etc. In this embodiment, the diameter of the third oil guiding hole 741 is not limited.

[0073] It can be understood that if the oil guiding part 74 is short in the axial direction of the shaft 3, the oil in the second cavity 92 is difficult to flow into the other end of the shaft hole 31, i.e., difficult to flow into the third straight hole segment 315, when flowing through the second oil guiding hole 71 to the shaft hole 31. In this way, the cooling effect of the shaft 3 will be affected.

[0074] If the oil guiding part 74 is long in the axial direction of the shaft 3, the oil in the second cavity 92 will flow directly into the shaft hole 31 through the second oil guiding hole 71 and the third oil guiding hole 741, and then cannot flow to the bearing 6 through the annular cavity 50. In this way, the lubrication effect of the bearing 6 will be affected.

[0075] Therefore, in the embodiment, the size of the oil guiding part 74 in the axial direction of the shaft 3 is limited. Please refer to Figure 5 and Figure 7Specifically, in the axial direction of the rotating shaft 3, the first straight hole section 311 has a first size l 1, the first transition hole section 312 has a second size l 2, the second straight hole section 313 has a third size l 3, the oil guide portion 74 has a fourth size l 4, the fourth size l 4 is greater than or equal to the first size l 1 and less than the sum of the second size l 2 and the third size l 3.

[0076] In this way, the size of the oil guide portion 74 in the axial direction of the rotating shaft 3 is moderate. On the one hand, the cooling effect of the cooling oil on the rotating shaft 3 is good. On the other hand, the lubrication effect of the cooling oil on the bearing 6 is good.

[0077] In some specific embodiments, the fourth size l 4 is greater than or equal to 70.3 mm and less than or equal to 70.7 mm. For example, the fourth size l 4 can be 70.3 mm, 70.4 mm, 70.5 mm, 70.6 mm, 70.7 mm, etc. In this regard, the value of the fourth size l 4 is not specifically limited.

[0078] Further, in order to further improve the lubrication effect on the bearing 6, in some optional embodiments, a plurality of fourth oil guide holes 3131 are arranged on the side wall of the second straight hole section 313; the outlet of the fourth oil guide hole 3131 is arranged towards the bearing 6. In this way, the cooling oil flowing into the shaft hole 31 can flow to the bearing 6 through the fourth oil guide hole 3131 to lubricate the bearing 6.

[0079] In this way, even if the amount of cooling oil input by the oil inlet pipe 2 is insufficient, that is, only the three first oil guide holes 72 at the bottom of the oil guide body 7 deliver cooling oil to the bearing 6, part of the cooling oil can still flow to the bearing 6 through the third oil guide hole 741 and the fourth oil guide hole 3131 to lubricate the bearing 6.

[0080] In the motor 100 provided in the present embodiment, the cooling oil in the oil inlet pipe 2 first flows into the first cavity 91, and the cooling oil in the first cavity 91 flows in two parts, one part flows along the path of the first cavity 91→the first oil guide hole 72→the annular gap 30→the bearing 6;

[0081] Another part flows into the second cavity 92, and the cooling oil entering the second cavity 92 also flows in two parts, one part flows along the path of the second cavity 92→the third oil guide hole 741→the annular cavity 50→the oil passing gap 60→the annular gap 30→the bearing 6;

[0082] Another part flows into the shaft hole 31, and the cooling oil entering the shaft hole 31 flows to the other end of the rotating shaft 3 from one end of the rotating shaft 3 in one part, and flows to the bearing 6 through the fourth oil guide hole 3131 in another part.

[0083] The embodiment also provides a vehicle comprising the motor 100 in the above-mentioned embodiments. The motor 100 has been described in detail in the above-mentioned embodiments, and thus is not described here.

[0084] It should be noted that the vehicle provided by the embodiment should also comprise other modules or components capable of enabling the vehicle to normally operate and use, and other modules or components are not limited here.

[0085] The vehicle provided by the embodiment adopts the motor 100 in the above-mentioned embodiments, so that the compactness of the internal structure of the vehicle is good, the vehicle is convenient to assemble and manufacture, the cooling oil flowing in the oil inlet pipe 2 can lubricate the bearing 6, the use performance of the motor 100 is improved, and the use performance of the vehicle provided by the embodiment is improved.

[0086] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An electrical machine oil guide comprising an oil guide body, characterized in that The oil guide body comprises a main body part and an oil guiding part connected together, the main body part is used for connecting with the rear end cover assembly of the motor, and the oil guiding part is used for extending into the shaft hole of the rotating shaft of the motor; The main body part is provided with a first oil guiding hole for guiding the cooling oil to the bearing; The end of the oil guiding part away from the main body part is provided with a second oil guiding hole for guiding the cooling oil into the shaft hole; The axial direction of the second oil guiding hole is consistent with the axial direction of the rotating shaft, and the diameter of the second oil guiding hole is greater than or equal to 4.0 mm and less than or equal to 4.5 mm.

2. The motor oil guide of claim 1, wherein The main body part is an annular member, the main body part comprises a mounting ring located at the periphery and an oil guiding ring connected to the inner side of the mounting ring, the mounting ring is used for connecting with the rear end cover assembly, and the oil guiding part is connected with the oil guiding ring; The oil guiding ring is provided with a plurality of first oil guiding holes which are uniformly distributed along the circumferential direction of the oil guiding ring.

3. The motor oil guide of claim 1, wherein The side wall of the oil guiding part is provided with at least two third oil guiding holes which are uniformly distributed; The third oil guiding hole is used for guiding the cooling oil to the bearing.

4. An electric machine characterized by It comprises: An oil inlet pipe for conveying cooling oil; A rotating shaft with a shaft hole; A rear end cover assembly, part of the structure of which is arranged around the rotating shaft; A bearing arranged between the rotating shaft and the rear end cover assembly; and The oil guiding part of claim 1, the oil guiding part body is connected to the rear end cover assembly, and part of the structure of the oil guiding part body extends into the shaft hole, the oil guiding part body and the rear end cover assembly form an oil storage cavity, and the oil inlet pipe extends into the oil storage cavity. The first oil guiding hole is used for guiding the cooling oil in the oil storage cavity to the bearing; and the oil guiding part body is further provided with a second oil guiding hole which communicates the oil storage cavity and the shaft hole.

5. The electric machine of claim 4, wherein, The oil guiding part body comprises a main body part and an oil guiding part connected together, the main body part is used for connecting with the rear end cover assembly of the motor, and the oil guiding part is used for extending into the shaft hole of the rotating shaft of the motor; The oil storage cavity comprises a first cavity and a second cavity which are communicated, the main body part and the rear end cover assembly form the first cavity, and the second cavity is formed in the oil guiding part; The first oil guiding hole is provided on the main body part, and the first oil guiding hole is used for guiding the cooling oil in the first cavity to the bearing; The second oil guiding hole is provided on the oil guiding part, and the second oil guiding hole is used for guiding the cooling oil in the second cavity into the shaft hole.

6. The electric machine of claim 5, wherein, An annular cavity is formed between the oil guiding part and the inner wall of the shaft hole; The side wall of the oil guiding part is provided with a third oil guiding hole which communicates the second cavity and the annular cavity; The end of the rotating shaft close to the first cavity and the main body part form an oil passing gap, one end of the oil passing gap communicates with the annular cavity, and the other end of the oil passing gap corresponds to the bearing.

7. The electric machine of claim 5 or 6, wherein, The shaft hole comprises, in the direction from close to the first cavity to far from the first cavity, a first straight hole section, a first transition hole section and a second straight hole section in sequence, a hole diameter of the first straight hole section is smaller than a hole diameter of the second straight hole section, and the hole diameter of the first transition hole section gradually increases in the direction from the first straight hole section to the second straight hole section; In the axial direction of the rotating shaft, the first straight hole section has a first size, the first transition hole section has a second size, the second straight hole section has a third size, the oil guiding part has a fourth size, and the fourth size is greater than or equal to the sum of the first size and the second size and smaller than the third size; The fourth size is greater than or equal to 70.3 mm and smaller than or equal to 70.7 mm.

8. The electric machine of claim 7, wherein, A plurality of fourth oil guiding holes are arranged on the side wall of the second straight hole section in intervals, and outlets of the fourth oil guiding holes are arranged towards the bearing; and / or The rear end cover assembly comprises a rear end cover and a cover plate connected together, the rear end cover is arranged around the rotating shaft, the oil guiding part body is connected to the rear end cover, and the oil guiding part body, the rear end cover and the cover plate jointly form the oil storage cavity.

9. A vehicle characterized by comprising: The electric machine comprises any one of claims 4 to 8.

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